From harold.fellermann at upf.edu  Thu Apr 14 13:38:26 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Thu, 14 Apr 2005 19:38:26 +0200
Subject: curses for different terminals
In-Reply-To: <219t51pr0he28bke65jl2c1t0k5528qa7m@4ax.com>
References: <mailman.1917.1113496457.1799.python-list@python.org> 
	<219t51pr0he28bke65jl2c1t0k5528qa7m@4ax.com>
Message-ID: <74e2b8a76d1e4606961d159f14b9b37a@upf.edu>


On 14.04.2005, at 19:17, Christos TZOTZIOY Georgiou wrote:

> On Thu, 14 Apr 2005 18:39:14 +0200, rumours say that harold fellermann
> <harold.fellermann at upf.edu> might have written:
>
>> Hi all,
>
>> I want to use curses in a server application that provides a GUI for
>> telnet clients. Therefore, I need the functionality to open and handle
>> several
>> screens.
>
> Just to make sure we understand what you want to do:
>
> 1. Are you doing an single process application that produces output on
> many terminals?  ie the program is kind of like a service?

gotcha. I want to write a TCP server that handles incoming requests in
threads (one thread per request using SocketServer.ThreadingTCPServer).
Now, I want the server to use curses for client-server communication
(client will be telnet). Thus, my programm runs in a single process
(although several threads) and provides several curses screens (one for
each client.)

>> Concerning
>> http://dickey.his.com/ncurses/ncurses-intro.html#init
>> this can be done using the function newterm(type,ofp,ifp). However, 
>> this
>> function seems not to be defined in the python library. Does anyone 
>> know
>> how this can be done in python?
>
> Select one of the above, or describe more the desired situation if I
> didn't cover your case, and we will try to help you more.

great, thanks,

- harold -

--
Dieses Schreiben wurde maschinell erstellt und bedarf daher keiner 
Unterschrift.
--



From fuzzyman at gmail.com  Tue Apr  5 09:47:08 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Apr 2005 06:47:08 -0700
Subject: Python Google Server
In-Reply-To: <1112706994.922193.5610@z14g2000cwz.googlegroups.com>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<mailman.1375.1112701816.1799.python-list@python.org>
	<1112706994.922193.5610@z14g2000cwz.googlegroups.com>
Message-ID: <1112708828.425612.75110@z14g2000cwz.googlegroups.com>

Another change - change the line `dotloc = url.find('.') + 1` to
`dotloc = url.rfind('.') + 1`

This makes it find the last '.' in the url

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From mehmetmutigozel at gmail.com  Fri Apr 22 17:41:45 2005
From: mehmetmutigozel at gmail.com (mehmetmutigozel at gmail.com)
Date: 22 Apr 2005 14:41:45 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
Message-ID: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>

I was thinking about something like the following;

>>> a=[ t**n for n in range(4) ]
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
NameError: name 't' is not defined
>>>

or

>>> a=[ lambda t: t**n for n in range(4) ]
>>> t=2
>>> a
[<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
<function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
>>> t=3
>>> a
[<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
<function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
>>>

is something like that possible? Will you give me advice about that?



From ritterhaus at yahoo.com  Wed Apr  6 15:49:51 2005
From: ritterhaus at yahoo.com (ritterhaus at yahoo.com)
Date: 6 Apr 2005 12:49:51 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <d31ctj$jp9$02$1@news.t-online.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<d31ctj$jp9$02$1@news.t-online.com>
Message-ID: <1112816991.860177.68420@l41g2000cwc.googlegroups.com>

Nope. Does't work. Running Python 2.3.4 on Debian, Linux kernel 2.6.
This is actually test code for a larger project...

# flash the selected wx.TextControl

for flasher in range(4):
    self.textField.SetBackgroundColour(255, 0, 0)
    time.sleep(0.8)
    self.textField.SetBackgroundColour(255, 255, 223)
    time.sleep(0.8)

Even when I add an explicit call to repaint the TextCtrl between each
sleep, things appear to be 'queued' until after the loop is fnished.
Very bizarre.



From bronger at physik.rwth-aachen.de  Wed Apr 20 09:16:55 2005
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 20 Apr 2005 15:16:55 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <878y3doaew.fsf@wilson.rwth-aachen.de>

Hall?chen!

Antoon Pardon <apardon at forel.vub.ac.be> writes:

> Op 2005-04-20, Torsten Bronger schreef <bronger at physik.rwth-aachen.de>:
>
>> [...]
>>
>> It's interesting to muse about a language that starts at "1" for
>> all arrays and strings, as some more or less obsolete languages
>> do.  I think this is more intuitive, since most people (including
>> mathematicians) start counting at "1".  The reason for starting
>> at "0" is easier memory address calculation, so nothing for
>> really high level languages.
>
> Personnaly I would like to have the choice. Sometimes I prefer to
> start at 0, sometimes at 1 and other times at -13 or +7.

In HTBasic you have the choice between 0 and 1; there is a global
source code directive for it.  However, hardly anybody really wants
to use HTBasic.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus


From beliavsky at aol.com  Thu Apr 28 13:46:47 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 28 Apr 2005 10:46:47 -0700
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <1114710407.077569.43810@l41g2000cwc.googlegroups.com>

demon_slayer2... at yahoo.com wrote:
> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in
focus
> for me?

Maybe Part VI, "Classes and OOP", of the book "Learning Python", 2nd
edition, by Lutz and Ascher. Both the motivation for OOP and its
implementation in Python are discussed, in about 100 pages.



From jerf at jerf.org  Tue Apr 26 21:36:42 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 21:36:42 -0400
Subject: schedule a monthly ftp event
References: <1114553735.360210.290000@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.04.27.01.36.42.976974@jerf.org>

On Tue, 26 Apr 2005 15:15:35 -0700, willitfw wrote:

> Greetings,
> I am looking for some guidance on a script.
> 
> My goals are:
> 1) have this script run automatically through a time set schedule.
> 2) verify if a file is updated on an ftp site (usually on the 15th of
> the month).
> 3) If the updated file exists, ftp it to local drive.
> 4) e-mail other users when the file has been updated on the local
> drive.

Operating system?

comp.lang.python can help you with the other stuff, but the scheduling is
OS-dependent. (Which isn't to say you won't get help, but it is,
technically, off topic.) On UNIX, use some "cron" varient, Windows has
some sort of Scheduler built in but I've never done anything with it but
turn it off, and I have no clue about Mac, though perhaps it has cron too
in OSX.



From mirnazim at gmail.com  Thu Apr 28 06:42:22 2005
From: mirnazim at gmail.com (Mir Nazim)
Date: 28 Apr 2005 03:42:22 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1114665613.879362.75100@l41g2000cwc.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
	<1114587592.260950.181990@l41g2000cwc.googlegroups.com>
	<1114587846.011299.125420@g14g2000cwa.googlegroups.com>
	<1114663336.926935.97910@f14g2000cwb.googlegroups.com>
	<1114665613.879362.75100@l41g2000cwc.googlegroups.com>
Message-ID: <1114684942.036081.8880@o13g2000cwo.googlegroups.com>

Ok I get your point.
Well actually my application is small in the begining, but then may be
will a large one when we want to add more features.



From nde at no.spam.org  Wed Apr 20 07:52:40 2005
From: nde at no.spam.org (Nick Efford)
Date: Wed, 20 Apr 2005 11:52:40 +0000 (UTC)
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <d45fq7$bsq$1@iss-nntp.leeds.ac.uk>

seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
> Many people I know ask why Python does slicing the way it does.....

> Can anyone /please/ give me a good defense/justification???

> I'm referring to why mystring[:4] gives me
> elements 0, 1, 2 and 3 but *NOT* mystring[4] (5th element).

mystring[:4] can be read as "the first four characters of mystring".
If it included mystring[4], you'd have to read it as "the first
five characters of mystring", which wouldn't match the appearance
of '4' in the slice.

Given another slice like mystring[2:4], you know instantly by
looking at the slice indices that this contains 4-2 = 2 characters
from the original string.  If the last index were included in the
slice, you'd have to remember to add 1 to get the number of
characters in the sliced string.

It all makes perfect sense when you look at it this way!


Nick


From Michael.Coll-Barth at VerizonWireless.com  Sat Apr 16 10:43:37 2005
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Sat, 16 Apr 2005 10:43:37 -0400
Subject: trouble to print array contents using slice operator
Message-ID: <20050416144341.7FE591E4003@bag.python.org>

print a[10:15] 
or 
print a[10:]



-----Original Message-----
From:
python-list-bounces+michael.coll-barth=verizonwireless.com at python.org
[mailto:python-list-bounces+michael.coll-barth=verizonwireless.com at pytho
n.org]On Behalf Of praba kar
Sent: Saturday, April 16, 2005 10:28 AM
To: python-list at python.org
Subject: trouble to print array contents using slice operator


Dear all,

   In Php array_slice function base
we can print array contents as per our desire
eg)

$a = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
$arr = array_slice($a,10,10);

this function will print 11,12,13,14,15

But I try to print the same thing in python
using slice operator 

eg) print a[10:10] 

This statement print [] empty array.  

How I need to get my desired output like php
array_slice function?

with regards
Prabahar



 

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___________________________________________________________________
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If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
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From lee at example.com  Thu Apr  7 16:13:42 2005
From: lee at example.com (Lee Harr)
Date: Thu, 07 Apr 2005 20:13:42 GMT
Subject: Problems extracting attachment from email
References: <cf4db78a.0504070817.3c776e07@posting.google.com>
Message-ID: <Wvg5e.727$uA3.224@news02.roc.ny>

On 2005-04-07, foten <valinor at linuxmail.org> wrote:
> The problem I'm having is when I'm trying to extract the
> attachement using
>         f=open(Filename, "wb")
>         f.write(msg.get_payload(decode=1))
>         f.close()
> Not the whole message is decoded and stored!
> When only trying
>         f.write(msg.get_payload())
> I see that the last 255 bytes are missing.
>


What happens if you do...

m = msg.get_payload(decode=1)
f.write(m)
f.write(m)
f.close()
?

Just wondering if maybe some buffer not
being flushed properly.

Maybe could replace the 2nd f.write()
with an f.flush()


From gsakkis at rutgers.edu  Sat Apr 30 04:32:02 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 30 Apr 2005 01:32:02 -0700
Subject: Numeric/Numarray equivalent to zip ?
Message-ID: <1114849922.518669.105590@l41g2000cwc.googlegroups.com>

What's the fastest and most elegant equivalent of zip() in
Numeric/Numarray between two equally sized 1D arrays ? That is, how to
combine two (N,)-shaped arrays to one (N,2) (or (2,N)) shaped ? I
expect the fastest and the most elegant idiom to be identical, as it is
usually the case in this excellent library, but if not, both would be
useful to know. Thanks,

George



From steven.bethard at gmail.com  Wed Apr 13 03:23:47 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 01:23:47 -0600
Subject: Doubt regarding sorting of a list specific field
In-Reply-To: <d3ieb4$fd8$1@news4.zwoll1.ov.home.nl>
References: <mailman.1817.1113371391.1799.python-list@python.org>
	<d3ieb4$fd8$1@news4.zwoll1.ov.home.nl>
Message-ID: <X5idnYh-5fGYVMHfRVn-hA@comcast.com>

vincent wehren wrote:
> "praba kar" <prabapython at yahoo.co.in> schrieb im Newsbeitrag 
> news:mailman.1817.1113371391.1799.python-list at python.org...
> | Dear All,
> |
> |    I have doubt regarding sorting. I have a list
> | that list have another list (eg)
> |
> | list = [[1234,'name1'],[2234,'name2'],[0432,'name3']]
> 
> -> Be careful, 0432 is octal notation for 282.
> |
> | I want to sort only numeric value having array field.
> | How I need to do for that.
> 
> You may want use the decorate-sort-undecorate idiom.
> I othere words, you isolate the index you want to sort by,
> sort on the indices, than get rid of the indices again.
> 
> Something like:
> 
> def sortSeqOfSeqs(seq, idx):
>     tmp = sorted([(elem[idx], elem) for elem in seq])
>     return [elem[1] for elem in tmp]

Note that this is not stable:

py> seq = [(1,'c'),(1,'b')]
py> [tup[1] for tup in sorted((x[0], x) for x in seq)]
[(1, 'b'), (1, 'c')]

Which should not have reordered the list since 1 == 1.  If you want a 
stable version, you could use:

py> [tup[2] for tup in sorted((x[0], i, x) for i, x in enumerate(seq))]
[(1, 'c'), (1, 'b')]

But that seems pretty silly.  You're already using Python 2.4 features 
(e.g. sorted), so you might as well use the key argument to sorted:

py> sorted(seq, key=operator.itemgetter(0))
[(1, 'c'), (1, 'b')]

Note if you're not using 2.4, you may want to use the 
decorate-sort-undecorate pattern like:

py> decorated_seq = [(x[0], i, x) for i, x in enumerate(seq)]
py> decorated_seq.sort()
py> [tup[2] for tup in decorated_seq]
[(1, 'c'), (1, 'b')]

But personally, I'd just upgrade. ;)

STeVe


From jjl at pobox.com  Fri Apr 22 16:07:41 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 20:07:41 +0000
Subject: trying to read from dying disk
References: <1114195387.535143.76860@o13g2000cwo.googlegroups.com>
Message-ID: <871x92mv76.fsf@pobox.com>

jdh2358 at gmail.com writes:

> I have a python file that is trying to read raw data from a raw
> partition on a dying dist, eg
[...]
> On some blocks, the read succeeds, on others it fails and an IOError is
> thrown, and on others it appears to hang indefinitely and will not
> respond to any attempt to kill it with 'kill -9 PID', etc.
> 
> Is there anyway to do a timeout read on this kind of file, or even to
> kill the process once it hangs?
> 
> linux kernel 2.6.10
> python 2.4.1

This sounds like a linux kernel question much more than a Python one.
Try a linux programmers' list?


John


From donn at drizzle.com  Sat Apr  2 10:42:40 2005
From: donn at drizzle.com (Donn Cave)
Date: Sat, 02 Apr 2005 15:42:40 -0000
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net>
Message-ID: <1112456559.835048@yasure>

Quoth Scott David Daniels <Scott.Daniels at Acm.Org>:
| Sunnan wrote:
| > ...Because what is "boring"? The opposite of dense, tense, intense. Utterly 
| > predictable; it's like the combination of all my prejudices. Even before 
| > I knew, I thought "Bet Python separates statements from expressions".
|
| Python is for terse, pithy prose; Python is not for poetry.

That's an odd thing to say.  Poetry is verbose, florid?
Python is Dutch.

	Donn


From mikin at yourmail.com  Tue Apr 12 09:44:17 2005
From: mikin at yourmail.com (Mikin von Flap)
Date: Tue, 12 Apr 2005 15:44:17 +0200
Subject: Extending an embeded Python
Message-ID: <RgQ6e.111644$Vf.4177209@news000.worldonline.dk>

I'm trying to embed Python in a Windows exe, and extend it with some 
functions in the same program. So far I only add one function:
<file.h>
static PyObject* py_print( PyObject* self, PyObject* args ) {
const char* msg;
if( !PyArg_ParseTuple( args, "s", &msg ) )
return 0;
EventLog::log( msg );
Py_INCREF( Py_None );
return Py_None;
}
static PyMethodDef StoneAgeMethods[] = {
{ "log", py_print, METH_VARARGS, "Print a message to the log" },
{ 0, 0, 0, 0 } /* sentinel */
};
<file.cpp>
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE, LPSTR, int ) {
EventLog::init( "con_dump.txt" );
Py_Initialize();
EventLog::log( "Python version '%s'", Py_GetVersion() );
PyObject* res0 = Py_InitModule( "stoneage", StoneAgeMethods );
res1 = PyRun_SimpleString( "stoneage.log( \"test\" )\n" ); // FAIL
res2 = PyRun_SimpleString( "log( \"test\" )\n" ); // FAIL
res3 = PyRun_SimpleString( "print \"test\"\n" ); // OK
Py_Finalize();
}
This compiles without problems, but when I run it I can't use the "log" 
function. Result res0 is a non-null object.
As far as I can understand the "Extending and Embedding the Python 
Interpreter" doc, res1 should work but it doesn't!
I'm a total newbie to Python, so any help appreciated :) 




From philippe at philippecmartin.com  Wed Apr 20 13:09:59 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Wed, 20 Apr 2005 17:09:59 GMT
Subject: Faster os.walk()
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
	<mailman.2181.1114012135.1799.python-list@python.org>
	<dqCdneACDr5-5vvfRVn-tA@powergate.ca>
	<1114016094.531694.117130@z14g2000cwz.googlegroups.com>
Message-ID: <H1w9e.891$l45.867@newssvr12.news.prodigy.com>

How about rerouting stdout/err and 'popening" something like 

/bin/find -name '*' -exec
a_script_or_cmd_that_does_what_i_want_with_the_file {} \;

?

Regards,

Philippe




fuzzylollipop wrote:

> du is faster than my code that does the same thing in python, it is
> highly optomized at the os level.
> 
> that said, I profiled spawning an external process to call du and over
> the large number of times I need to do this it is actually slower to
> execute du externally than my os.walk() implementation.
> 
> du does not return the value I need anyway, I need files only not raw
> blocks consumed which is what du returns. also I need to filter out
> some files and dirs.
> 
> after extensive profiling I found out that the way that os.walk() is
> implemented it calls os.stat() on the dirs and files multiple times and
> that is where all the time is going.
> 
> I guess I need something like os.statcache() but that is deprecated,
> and probably wouldn't fix my problem. I only walk the dir once and then
> cache all bytes, it is the multiple calls to os.stat() that is kicked
> off by the os.walk() command internally on all the isdir() and
> getsize() and what not.
> 
> just wanted to check and see if anyone had already solved this problem.



From http  Fri Apr 22 15:21:02 2005
From: http (Paul Rubin)
Date: 22 Apr 2005 12:21:02 -0700
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
Message-ID: <7x8y3afwip.fsf@ruckus.brouhaha.com>

Mage <mage at mage.hu> writes:
> I am flirting with the idea of developing a gui app in python as a
> newbie. Which module should I use?

Tkinter is the most widespread and it's pretty easy to use.

> I have noticed that wxpython is already installed on my gentoo and the
> examples on their wiki looks easy. Is it okay or should I use wax or
> something else?

If wxpython already installed, then that's great.  It's not
preinstalled on the RH9 or FC3 systems I use, and I found it an
enormous pain to install.  I eventually gave up.


From joal at bigpond.net.au  Sat Apr  2 22:46:36 2005
From: joal at bigpond.net.au (Joal Heagney)
Date: Sun, 03 Apr 2005 03:46:36 GMT
Subject: Name of IDLE on Linux
In-Reply-To: <8KI3e.2623$44.1361@newsread1.news.atl.earthlink.net>
References: <mailman.1242.1112466945.1799.python-list@python.org>
	<V7D3e.2366$44.1509@newsread1.news.atl.earthlink.net>
	<8764z4nbv5.fsf@thomas.local>
	<8KI3e.2623$44.1361@newsread1.news.atl.earthlink.net>
Message-ID: <wGJ3e.22064$C7.197@news-server.bigpond.net.au>

Edward Diener wrote:
> Thomas Rast wrote:
> 
>>Edward Diener <eldiener_no_spam_here at earthlink.net> writes:
>>
>>
>>>It is a pity the Python Linux binary installations do not
>>>create folders on the desktop or in the Gnome menu system with links
>>>to the Python to the documentation and a readme telling me what
>>>executables were installed.
>>
>>Imagine they did, and the other 1392 packages (on my system) too :-)
> 
> 
> I can understand that <g>. But I would rather have links somewhere than not
> know what it was a particular package does and how to use it. As a relative
> Linux newbie, I have found it disconcerting to have things installed on my
> system when I first booted the system or when I install new packages or
> upgrade existing ones, and not know what these packages are used for. One
> can always delete links, and they are cheap, so I would rather have too much
> to begin with than too little.
> 
> 
>>Documentation usually resides in /usr/share/doc/<package>,
>>/usr/share/doc/packages/<package> or similiar.  You're on an RPM-based
>>system, so
>>
>>$ rpm -ql <package>
>>
>>lists all files belonging to that package.  You should have little
>>trouble spotting the documentation files there.
> 
> 
> Thanks. That does help.
> 
> 
As a "relative linux newbie" (Aren't we all? I've been using linux for 7 
years now, and the only thing that has happened is that my definition of 
"newbie" has stretched.), you might find the following useful.

If you're using KDE, you can set a bookmark in konqueror to the 
documentation and it'll bring it up in the bookmark toolbar. Only hassle 
is when you update python and the docs, you have to edit the bookmark.

Another approach is to type in /usr/share/doc/py into the konqueror URL 
and it'll pop up a list of folders containing python documentation.

Joal

PS: DON'T add a general bookmark to /usr/share/doc
I did that when I was beginning, and every time I went document hunting, 
I'd have to wait a good minute and a half for konqueror to display all 
the folders in this directory.


From steven.bethard at gmail.com  Sat Apr  2 12:21:11 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 02 Apr 2005 10:21:11 -0700
Subject: Ternary Operator in Python
In-Reply-To: <424e8e5a$1@nntp0.pdx.net>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<mailman.1198.1112380413.1799.python-list@python.org>
	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
	<roy-C95782.18531401042005@reader1.panix.com>
	<424e8e5a$1@nntp0.pdx.net>
Message-ID: <X92dnajH-6LCSdPfRVn-jQ@comcast.com>

Scott David Daniels wrote:
> Roy Smith wrote:
> 
>> ...  How our tools warp our thinking.
> 
> That is what it means to be human.  I can think of no better reason
> for a programmer to regularly learn languages: "our tools warp our
> thinking."  A programmer is a professionally warped thinker.
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org

+1 QOTW

STeVe


From mahs at telcopartners.com  Tue Apr 19 19:28:07 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 19 Apr 2005 16:28:07 -0700
Subject: Array of Chars to String
In-Reply-To: <42658990.7739398@news.oz.net>
References: <mailman.2133.1113942800.1799.python-list@python.org>
	<42658990.7739398@news.oz.net>
Message-ID: <d443t0$tg8$1@sea.gmane.org>

Bengt Richter wrote:
  > I think this will be worth it if your string to modify is _very_ long:
> 
>  >>> def some_func(s, letters, table=''.join([chr(i) for i in xrange(256)])):
>  ...     return s.translate(table,
>  ...            ''.join([chr(i) for i in xrange(256) if chr(i) not in letters]))
>  ...
>  >>> some_func("Bob Carol Ted Alice", 'adB')
>  'Bad'
> 
According to my measurements the string doesn't have to be long at all before 
your method is faster - cool use of str.translate:

  >>> def some_func(s, letters, table=''.join([chr(i) for i in xrange(256)])):
  ...     return s.translate(table,
  ...         ''.join([chr(i) for i in xrange(256) if chr(i) not in letters]))
  ...
  >>> some_func("Bob Carol Ted Alice", 'adB')
  'Bad'

  >>> def func_join(s, letters):
  ...     return "".join(letter for letter in s if letter in set(letters))
  ...
  >>> def func_join1(s, letters):
  ...     return "".join(letter for letter in s if letter in letters)


  >>> for multiplier in (1, 10, 100, 1000, 10000):
  ...     print "List multiplier: %s" % multiplier
  ...     print shell.timefunc(func_join, "Bob Carol Ted Alice" * multiplier, 'adB')
  ...     print shell.timefunc(func_join1, "Bob Carol Ted Alice" * multiplier, 
'adB')
  ...     print shell.timefunc(some_func, "Bob Carol Ted Alice" * multiplier, 'adB')
  ...
  List multiplier: 1
  func_join(...)  11267 iterations, 44.38usec per call
  func_join1(...)  38371 iterations, 13.03usec per call
  some_func(...)  1230 iterations, 406.69usec per call
  List multiplier: 10
  func_join(...)  1381 iterations, 362.40usec per call
  func_join1(...)  7984 iterations, 62.63usec per call
  some_func(...)  1226 iterations, 407.94usec per call
  List multiplier: 100
  func_join(...)  140 iterations, 3.59msec per call
  func_join1(...)  873 iterations, 0.57msec per call
  some_func(...)  1184 iterations, 422.42usec per call
  List multiplier: 1000
  func_join(...)  15 iterations, 35.50msec per call
  func_join1(...)  90 iterations, 5.57msec per call
  some_func(...)  949 iterations, 0.53msec per call
  List multiplier: 10000
  func_join(...)  2 iterations, 356.53msec per call
  func_join1(...)  9 iterations, 55.59msec per call
  some_func(...)  313 iterations, 1.60msec per call
  >>>

Michael



From ruses at users.snip.snip.ch  Wed Apr 20 06:29:49 2005
From: ruses at users.snip.snip.ch (Maurice Caret)
Date: Wed, 20 Apr 2005 12:29:49 +0200
Subject: goto statement
In-Reply-To: <mailman.2160.1113991926.1799.python-list@python.org>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2160.1113991926.1799.python-list@python.org>
Message-ID: <42662f0a$1_2@news.bluewin.ch>

Simon Brunning a ?crit :
> On 4/20/05, praba kar <prabapython at yahoo.co.in> wrote:
> 
>>   In Python what is equivalent to goto statement
> 
> 
> http://docs.python.org/tut/node6.html
> 
> See, it's those dratted node numbers again. ;-)
> 

other equivalents are in

http://docs.python.org/tut/node10.html


From fredrik at pythonware.com  Tue Apr 12 02:03:36 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 08:03:36 +0200
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com><d2v4b7$pb4$1@panix1.panix.com><86k6nbww6z.fsf@guru.mired.org>
	<d39ooc$pvr$1@panix1.panix.com> <861x9gwvys.fsf@guru.mired.org>
Message-ID: <d3fo4v$ecr$1@sea.gmane.org>

Mike Meyer wrote:

>> Yup, that's why emacs stands for Eighty Megabytes And Constantly
>> Swapping.  ;-)
>
> Gee, it's changed from eight to eighty. Probably because eight is a
> small app by todays standards. Then again, it's not like 80 is large
> these days.

my emacs starts in no time at all, and consumes just under 6 megs with python-
mode and a couple of moderately-sized python modules in memory.  that's just
over 1% of the available memory on this stock hardware.

guess my emacs is broken.

</F> 





From martin at v.loewis.de  Wed Apr 20 02:30:50 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 20 Apr 2005 08:30:50 +0200
Subject: Encoding Questions
In-Reply-To: <1113939785.827851.144980@l41g2000cwc.googlegroups.com>
References: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>
	<d43j6h$5ub$1@news4.zwoll1.ov.home.nl>
	<1113939785.827851.144980@l41g2000cwc.googlegroups.com>
Message-ID: <4265f71a$0$17562$9b622d9e@news.freenet.de>

jalil at feghhi.com wrote:
> thanks for the replies. As for why I set my default encoding to utf-8
> in python, I did it a while ago and I think I did it because when I was
> reading some strings from database in utf-8 it raised errors b/c there
> were some chars it could recongnize in standard encoding. When I made
> the change, the error didn't happen anymore.
> 
> Does it make sense? 

No. If reading the strings from the database already gives an exception
(i.e. without any processing of these strings), that is a bug in the
database. It is also unlikely that this is what actually happened.

More likely, you are reading the strings from the database, and then
combining them explicitly with Unicode strings. Instead of changing
the default encoding, you should tell your database adapter to return
the strings as Unicode objects; if this is not supported, you should
convert them to Unicode objects in the process of reading them.

Regards,
Martin


From aahz at pythoncraft.com  Mon Apr 18 12:24:54 2005
From: aahz at pythoncraft.com (Aahz)
Date: 18 Apr 2005 09:24:54 -0700
Subject: Removing dictionary-keys not in a set?
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
Message-ID: <d40n0m$s78$1@panix3.panix.com>

In article <1113824946.525441.285760 at l41g2000cwc.googlegroups.com>,
Tim N. van der Leeuw <tim.leeuwvander at nl.unisys.com> wrote:
>
>I'd like to remove keys from a dictionary, which are not found in a
>specific set. So it's kind of an intersection-operation.

Why not just use the builtin set operations?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From removethis.kartic.krishnamurthy at gmail.com  Thu Apr 28 17:59:35 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 28 Apr 2005 21:59:35 GMT
Subject: why "import wx" doesn't work?
In-Reply-To: <4271560d$1_2@rain.i-cable.com>
References: <427126ca$1_3@rain.i-cable.com>
	<AIGdndAYHJms3ezfRVn-ig@powergate.ca>
	<4271560d$1_2@rain.i-cable.com>
Message-ID: <b1dce.988$nM3.173@newssvr31.news.prodigy.com>

The Great 'monkey' uttered these words on 4/28/2005 5:30 PM:
> It is the current version of wxPython(2.6). But follow you instruction it
> still can't work...
> But if using the default "from wxPython.wx import *", it work, don't know
> what is the problem. May be this is an old example that cannot work with
> "import wx". Because I get another example and it is ok.
> 


I suspect you are mixing program code for the namespace version (import 
wx) with the old method of importing (from wxPython.wx import *).

Here are two version of a very simple app... try both and see if you get 
any errors. And if so, _please_ post the exact error you get.

--- BEGIN The "new" namespace version ----

import wx

class MainFrame(wx.Frame):
     def __init__(self, parent, id=-1, title="Test Wx", size=(-1, -1), 
pos=(-1,-1), style=wx.DEFAULT_FRAME_STYLE|wx.NO_FULL_REPAINT_ON_RESIZE):
         wx.Frame.__init__(self, parent, id, title, size, pos, style)
         self.Show(True)

app = wx.PySimpleApp()
frame = MainFrame(None, -1, "Test Wx NameSpace Style")
app.MainLoop()

--- END The "new" namespace version ----

--- BEGIN The old style import ----

from wxPython.wx import *

class MainFrame(wxFrame):
     def __init__(self, parent, id=-1, title="Test Wx", size=(-1, -1), 
pos=(-1,-1), style=wxDEFAULT_FRAME_STYLE|wxNO_FULL_REPAINT_ON_RESIZE):
         wxFrame.__init__(self, parent, id, title, size, pos, style)
         self.Show(True)

app = wxPySimpleApp()
frame = MainFrame(None, -1, "Test Wx Old Style")
app.MainLoop()

--- END The old style import ----

Hope that helped!

Thanks,
-Kartic



From bill.mill at gmail.com  Wed Apr 20 10:18:39 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 20 Apr 2005 10:18:39 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
	<slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <797fe3d4050420071852568e03@mail.gmail.com>

On 20 Apr 2005 13:39:42 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> Op 2005-04-20, Bill Mill schreef <bill.mill at gmail.com>:
> > On 20 Apr 2005 12:52:19 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> >> Op 2005-04-20, Torsten Bronger schreef <bronger at physik.rwth-aachen.de>:
> >> > Hall?chen!
> >> >
> >> > nde at no.spam.org (Nick Efford) writes:
> >> >
> >> >> seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
> >> >>> Many people I know ask why Python does slicing the way it does.....
> >> >>
> >> >>> Can anyone /please/ give me a good defense/justification???
> >> >>
> >> >>> I'm referring to why mystring[:4] gives me elements 0, 1, 2 and 3
> >> >>> but *NOT* mystring[4] (5th element).
> >> >>
> >> >> mystring[:4] can be read as "the first four characters of
> >> >> mystring".  If it included mystring[4], you'd have to read it as
> >> >> "the first five characters of mystring", which wouldn't match the
> >> >> appearance of '4' in the slice.
> >> >>
> >> >> [...]
> >> >>
> >> >> It all makes perfect sense when you look at it this way!
> >> >
> >> > Well, also in my experience every variant has its warts.  You'll
> >> > never avoid the "i+1" or "i-1" expressions in your indices or loops
> >> > (or your mind ;).
> >> >
> >> > It's interesting to muse about a language that starts at "1" for all
> >> > arrays and strings, as some more or less obsolete languages do.  I
> >> > think this is more intuitive, since most people (including
> >> > mathematicians) start counting at "1".  The reason for starting at
> >> > "0" is easier memory address calculation, so nothing for really high
> >> > level languages.
> >>
> >> Personnaly I would like to have the choice. Sometimes I prefer to
> >> start at 0, sometimes at 1 and other times at -13 or +7.
> >>
> >
> > -1. You can start arrays at 0 or 1 (and arbitrary bases? I don't
> > recall) in VB, and it's an unmitigated disaster. It adds needless
> > complexity.
> 
> Complexity that is now put on the programmers shoulders.
> 
> If I have a table with indexes going from -13 to +7, I have to
> add the offset myself if I want to use a list for that.
> 
> > What our slicing system loses in elegance in a few cases,
> > it more than makes up for in consistency throughout all programs.
> 
> You write this af if other solutions can't be consistent.

Propose one, and I won't write it off without thinking, but my bias is
way against it from experience. Knowledge gets scattered across the
program, unless you're defining the start index every time you use the
list, which seems no better than adding an offset to me.

Peace
Bill Mill
bill.mill at gmail.com


From WLigtenberg at gmail.com  Fri Apr 22 09:56:29 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Fri, 22 Apr 2005 15:56:29 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
	<pan.2005.04.22.13.22.14.591804@gmail.com>
	<mailman.2282.1114177844.1799.python-list@python.org>
Message-ID: <pan.2005.04.22.13.56.27.343483@gmail.com>

As you can read in the other post of mine, my problem was with the
iterating through the list. didn't know that you should do. e.text. I did
only print e, not print e.text
Did read documentation, but must admit not everything.

Anyway, thank you very much!

On Fri, 22 Apr 2005 15:47:08 +0200, Fredrik Lundh wrote:

> Willem Ligtenberg wrote:
> 
>> As I'm trying to write the code using cElementTree.
>> I stumble across one problem. Sometimes there are multiple values to
>> retrieve from one record for the same element. Like this:
>> <Prot-ref_name_E>ATP-binding cassette, subfamily G, member 1</Prot-ref_name_E>
>> <Prot-ref_name_E>ATP-binding cassette 8</Prot-ref_name_E>
>> 
>> How do you get not only the first, but the rest as well, so that I can
>> store it in a list.
> 
> findall returns a list of matching elements.  if "elem" is the paretnt element,
> this gives you a list of the text inside all Prot-ref_name_E child elements:
> 
>     [e.text for e in elem.findall("Prot-ref_name_E")]
> 
> (you have read the elementtree documentation, I hope?)
> 
> </F>



From eurleif at ecritters.biz  Mon Apr 25 06:23:43 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Mon, 25 Apr 2005 10:23:43 GMT
Subject: HTML cleaner?
In-Reply-To: <d4h9uv$cge$1@bagan.srce.hr>
References: <d4h9uv$cge$1@bagan.srce.hr>
Message-ID: <Py3be.2163$Cz3.284799@monger.newsread.com>

Ivan Voras wrote:
> Is there a HTML clean/tidy library or module written in pure python? I 
> found mxTidy, but it's a interface to command-line tool.
> 
> What I'm searching is something that will accept a list of allowed tags 
> and/or attributes and strip the rest from HTML string.

Here's a module I wrote to do something along the lines of what you 
want: <http://ecritters.biz/limithtml.py>. Unfortunately, it requires 
the HTML to be relatively well-formed (e.g. it doesn't like things like 
"<i><b>foo</i></b>"), so I feed the HTML into uTidyLib (another 
interface to HTML Tidy) first. I'm not sure why you don't want to use 
Tidy, but if you do change your mind, you should be able to use my 
module alongside Tidy to limit the HTML elements and attributes which 
will be accepted.


From ivanlan at pauahtun.org  Fri Apr 22 20:31:12 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Fri, 22 Apr 2005 18:31:12 -0600
Subject: trying to read from dying disk
References: <1114195387.535143.76860@o13g2000cwo.googlegroups.com>
	<871x92mv76.fsf@pobox.com>
	<1114203696.267519.189200@o13g2000cwo.googlegroups.com>
Message-ID: <42699750.567A888A@pauahtun.org>

Hi All--

jdh2358 at gmail.com wrote:
> 
> I'm currently attempting something with
> 
>   http://www.python.org/doc/current/lib/node368.html
> 
> but it seems the read operation is ignoring these signals just as it is
> ignoring my signals from the kill command -- perhaps unsurprisingly.
> 
> Perhaps there is no hope.
> 


Basically, if you are waiting for a hardware interrupt that never comes,
you are doomed.  You can escape by rebooting; in dire cases the only way
out is to power down.  One of the prime sources of zombie processes on
unix systems is users trying to interrupt (with ^C) a process that is
waiting for a hardware interrupt.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From reinhold-birkenfeld-nospam at wolke7.net  Wed Apr 20 14:53:31 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Wed, 20 Apr 2005 20:53:31 +0200
Subject: What's the difference between these 2 statements?
In-Reply-To: <70c4ec00.0504201052.30227e93@posting.google.com>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
Message-ID: <3cnmpbF6gnlkhU1@individual.net>

ATSkyWalker wrote:
> What's the difference between these 2 statements?
> 
> If you have a String s="12345"
> 
> s[len(s)::-1] = "54321"
> 
> But
> 
> s[len(s):0:-1] = "5432"
> 
> Why? What's the difference? What number then can I use as the end of
> the slice if I were to supply all 3 parameters?

-1.

Reinhold


From bokr at oz.net  Thu Apr 14 02:02:05 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 14 Apr 2005 06:02:05 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
Message-ID: <425e0615.339549977@news.oz.net>

On 13 Apr 2005 18:20:06 -0700, Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

>Dick Moores <rdm at rcblue.com> writes:
>> I need to figure out how to compute pi to base 12, to as many digits
>> as possible. I found this reference,
>> <http://mathworld.wolfram.com/Base.html>, but I really don't
>> understand it well enough. Could someone show me how to do what I need?
>
>Using the GNU "bc" utility:
>
>  $ bc -l
>  bc 1.06
>  Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
>  This is free software with ABSOLUTELY NO WARRANTY.
>  For details type `warranty'. 
>  scale = 3000    # number of output places wanted
>  obase = 12      # output base
>  print 4 * a(1)  # pi = 4*arctan(1)
>  3.184809493B918664573A6211BB151551A05729290A7809A492742140A60A55256A\
>  0661A03753A3AA54805646880181A3683083272BBBA0A370B12265529A828903B4B2\
>  56B8403759A71626B8A54687621849B849A8225616B442796A31737B229B23914898\
>  53943B8763725616447236B027A421AA17A38B52A18A838B01514A51144A23315A30\
>  09A8906B61B8B48A62253A88A50A43BA0944572315933664476B3AABB77583975120\
>  683526B75B462060BB03B432551913772729A2147553531793848A0402B999B50585\
>  35374465A68806716644039539A8431935198527B9399B112990ABB0383B10764542\
>  4577A51601B3624A88B7A676A3992912121A213887B92873946A61332242217AA735\
>  4115357744939112602BA4B888818A3269222B528487747839994AB223B65B876269\
>  5422822669BA00A586097842A51750362073B5A768363B21BB1A97A4A19444774939\
>  9804922175A068A46739461990A2065BB0A30BBAB7024A585B1A84428195489784A0\
>  7A331A7B0A1574565B373B05B03A5A80A13AB87857734679985558A5373178A7B282\
>  71992A3894A5776085083B9B238B2220542462888641A2BAB8B3083AB49659172A31\
>  2B78518654494A068662586A181835A64440B2970A12281397589881536720890580\
>  1032881449223841428763329617531239B9A657405584014534390B587625606BB8\
>  0923795944B43757A431B039556282978A6A49590553490BA1844947175637A90824\
>  7B50127722464441380A852B0847B5813019BB70A67663B426565434069884476132\
>  193344BA55A2128A03838974606B851B2979321A408067225A5AA4B3464A1A174735\
>  95333909AB9127079655B3164B68B9B28A9B818A220A025AB0934203995B7A62A7AA\
>  739355340539BA3182905B193905603A43B660B9426A92294697144A896A5B233935\
>  8BB2B7294BB89635B071A6351211360B820B1882AB8433B54757B87A373284B1BA18\
>  2A10326476B369A4A6365B58B8018994BB152556765475A704BB94B6B2A39458971A\
>  8B90512786B5029404818644323552916170B3ABB7363496427B088B68725A685700\
>  40617949289077B278069A09B559324B8A66828B40549B0296065B2300330592569A\
>  7B76B92BA1293585B6A9B604567A0901362856373B4B56897946256B4172B1B50474\
>  351364749A33996A81BA8847347A8411B850B79A03018291672AA0945656A159AA6A\
>  A0A845531A592005B8A34366B882257107B190969A846474836A9800750778920BA7\
>  97297A2791101B0685A86BB704B9BAA17B055293679843B35215B0A8B1182B611953\
>  B080AA5431B219907A8448A81B1A9493245676B88013B47033524085959415862101\
>  4216619553246570601967448B470174B9244892444817453865A4003B5AA7176451\
>  AAB90681A949786154AA040477382BA69371041710B8728458A23979252B25423675\
>  3A44A1900AA283536A227648812525743868B410A567794663359A6726A528678332\
>  8135114789B7645505B047848020A730A9557B206776AA56A19682744107901306B2\
>  9008808619866B4911A05264B872A46B5376383932699531B449195640B62A636228\
>  30886247A47B3957169861239358041AA281333622AA15912B0A636047A489BB0726\
>  282A78B96671B27305A9652496B9B999011A7BA36898891665B1A6009058978850A2\
>  1B01A158A1473B84A192B8672542A2A7056581995207A436A5B3BA2824637A3112AB\
>  B57176468206A071200A327B3216425148100786502AA21236ABB35499277670A126\
>  9730583403B1922A483856007301983989159BB688A58B602339806B63002A339A50\
>  B0BA533B84827793913081070A32595A101803A9A20234691B1A0B623274B69B0B44\
>  688195169461059543A252BB05208720BA13118266A872B26B9B584959B44B
>  quit
>  $ 
>
>The arctan calculation takes about 20 sec on an Athlon of around 2 ghz.

That's cool. I will have to find out about bc. Thanks ;-)

Interesting to note, it also took about 20 sec on my _old_ machine:

 >>> from time import clock
 >>> def foo():
 ...    t0 = clock()
 ...    open('pi12by60.txt','w').write(
 ...         ''.join(c+'\n'[:(i+1)%60==0] for i,c in enumerate(pidigits(12, 3003)))+'\n')
 ...    print clock()-t0
 ...
 >>> foo()
 22.3866400935

That's on a 300Mhz Pentium II using the Lambert Meertens algorithm for pi ;-)

Regards,
Bengt Richter


From peter at engcorp.com  Thu Apr 14 13:38:40 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 14 Apr 2005 13:38:40 -0400
Subject: smtplib does not send to all recipients
In-Reply-To: <9Y-dndpOXf1sNMPfRVn-sA@powergate.ca>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>
	<mailman.1715.1113251652.1799.python-list@python.org>
	<1113421803.445281.3660@l41g2000cwc.googlegroups.com>
	<mailman.1859.1113430962.1799.python-list@python.org>
	<1113487680.752215.194840@l41g2000cwc.googlegroups.com>
	<9Y-dndpOXf1sNMPfRVn-sA@powergate.ca>
Message-ID: <9Y-dndVOXf04N8PfRVn-sA@powergate.ca>

Peter Hansen wrote:
> dccarson at gmail.com wrote:
>> OK, I've discovered the lost messages, but I'm still slightly confused
>> as to why they ended up there.  The messages were being delivered to
>> the local machine, box1.domain.com, even though I was addressing them
>> to <user>@domain.com.
> 
> The address is irrelevant with SMTP.  What matters is

Well, that statement by itself is pretty silly... :-(

I hope you got my point from the rest of the post.

-Peter


From mefjr75 at hotmail.com  Sat Apr 23 14:01:30 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 23 Apr 2005 11:01:30 -0700
Subject: PDF Printing support from Python
In-Reply-To: <116km8isuo9736c@corp.supernews.com>
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<116inf1aivjgd28@corp.supernews.com>
	<1114205820.773917.70820@f14g2000cwb.googlegroups.com>
	<116is1or7an6735@corp.supernews.com>
	<d4dje8$ebt$02$3@news.t-online.com>
	<116km8isuo9736c@corp.supernews.com>
Message-ID: <1114279290.689629.97770@z14g2000cwz.googlegroups.com>

> You're use of the word "driver" is one with which I'm not
> familiar.  But I don't really "do windows" so it's probably a
> Widnowism.
It is a windowism but not exclusively ;).
http://www.collaborium.org/onsite/romania/UTILS/Printing-HOWTO/winprinters.html

This is the first link I found that mentioned drivers, but the last
time I installed Linux-Mandrake I saw a document that went into detail
about CUPS and windows printing.
It seems that cups is available for windows( they also use the word
driver )
http://www.cups.org/windows/index.php
Ghostscript for windows available here
http://www.ghostscript.com/
http://www.cs.wisc.edu/~ghost/



From kasimov at i.com.ua  Sat Apr 30 11:25:31 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Sat, 30 Apr 2005 18:25:31 +0300
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <427255b4$1_3@newspeer2.tds.net>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
	<d4tbib$cb9$1@news.tsystems.kiev.ua>
	<427255b4$1_3@newspeer2.tds.net>
Message-ID: <4273A36B.5010501@i.com.ua>


sorry for my question, but i've read the documentation, and can't find where is the explanation of how it is exactly works (but of course i do believe you). If it is buit in function, can i see the source code of the method to find it out?

Kent Johnson wrote:
> Maksim Kasimov wrote:
> 
>> Kent Johnson wrote:
>>  > for line in open(path):
>> the line of your example raise another question: opened file will be 
>> read at once time, as method readlines() do, or it will be read line 
>> by line as method readline() do.
> 
> 
> It will be read line by line as readline() does.
> 
>> as far i know, it is depends on implementation of method "__iter__" of 
>> the object that "open()" returns, so another question: where i can 
>> find such an information (about how does such a functions works)?
> 
> 
> http://docs.python.org/lib/built-in-funcs.html
> http://docs.python.org/lib/bltin-file-objects.html
> 
> Kent


-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From dcrespo at gmail.com  Mon Apr 25 11:40:27 2005
From: dcrespo at gmail.com (dcrespo)
Date: 25 Apr 2005 08:40:27 -0700
Subject: cross platform printing
In-Reply-To: <na2p619khs6tl9l2qunjvnap2vki9pgada@4ax.com>
References: <0hx4e.3479$3O2.2184@trnddc01>
	<mVa5e.6469$6k4.803027@news20.bellglobal.com>
	<1GYae.2601$Nc.903@trnddc05> <86pswjpgtt.fsf@guru.mired.org>
	<na2p619khs6tl9l2qunjvnap2vki9pgada@4ax.com>
Message-ID: <1114443627.828336.291630@f14g2000cwb.googlegroups.com>

Hi Dennis... Then, what would be your solution? Print a PDF? If so, how
you do that without assuming that an
application is available to print it?

Daniel



From fredrik at pythonware.com  Tue Apr 19 08:54:57 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 19 Apr 2005 14:54:57 +0200
Subject: Memory leak in python
References: <20050419115818.67408.qmail@web31708.mail.mud.yahoo.com>
Message-ID: <d42ur7$pvi$1@sea.gmane.org>

"Abhishek S" <abhishek216 at yahoo.com> wrote:

> I am seeing that the python application is very slowly
> eating up the memory. i need help to indentify it.

what Python application?

> It start with 11MB and keeps growing by 1 MB around
> every 30mins.

have you checked for growing lists (etc)?

</F> 





From prabapython at yahoo.co.in  Fri Apr  8 04:24:57 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Fri, 8 Apr 2005 09:24:57 +0100 (BST)
Subject: doubt regarding  Conversion of date into timestamp
In-Reply-To: 6667
Message-ID: <20050408082457.58848.qmail@web8410.mail.in.yahoo.com>


Dear All,

     I am new to Python I want to know how to 
change a time into timestamp
 
eg "Fri, 8 Apr 2005 09:22:14 +0900" like format
date I want to change as a timestamp.

I have used below code to get timestamp
import time
time.strptime(v,'%a, %d %b %Y %X +0900')

function.  This function will return time stamp.  But
If the format of date string is changed.  This
function raise error 

eg My web application always return different format
of date

Fri, 8 Apr 2005 10:31:37 +0530
Fri, 8 Apr 2005 10:11:03 +0900
Fri, 8 Apr 2005 09:40:47 +0800

Kindly help to resolve this problem. 

with regards,
Prabahar 

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From steve at holdenweb.com  Fri Apr  1 19:08:41 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 01 Apr 2005 19:08:41 -0500
Subject: New to programming question
In-Reply-To: <iJc3e.20399$C7.2091@news-server.bigpond.net.au>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>	<0_63e.19914$C7.11056@news-server.bigpond.net.au>	<B%63e.19916$C7.1024@news-server.bigpond.net.au>	<424d1573.11134991@news.oz.net>
	<iJc3e.20399$C7.2091@news-server.bigpond.net.au>
Message-ID: <424DE289.7070006@holdenweb.com>

Joal Heagney wrote:
> Bengt Richter wrote:
> 
>> On Fri, 01 Apr 2005 07:46:41 GMT, Joal Heagney <joal at bigpond.net.au> 
>> wrote:
>>
>>
>>> Oh goddammmnitttt. I seem to be doing this a lot today. Look below 
>>> for the extra addition to the code I posted.
>>>
>>> Joal Heagney wrote:
>>>
>>>> Here's my contribution anycase:
>>>>
>>>> count = 0
>>>> # Get first input
>>>> name = raw_input("Guess my name: ")
>>>> # Give the sucker two extra goes
>>>> while count < 2:
>>>>    # Check the value of name
>>>>    if name == 'Ben':
>>>>        print "You're right!"
>>>>        break
>>>>    else:
>>>>        name = raw_input("Try again: ")
>>>
>>>
>>>       # Here's the bit I missed out.
>>>       count += 1
>>>
>>>> # Of course, we haven't checked the sucker's last guess
>>>> # so we have to do that now.
>>>> if count == 2:
>>>>    if name == 'Ben':
>>>>        print "You're right!"
>>>>    else:
>>>>        print "No more tries for you!!!"
>>>>
>>>>
>>>> Hope this helps.
>>>> Joal
>>>
>>>
>>> GRRRRRRRR.
>>>
>>
>>
>> Need something more straightforward, e.g., a wrapped one-liner:
>>
>>  >>> def guess(n=3): print ("You're right!", 'No more tries for 
>> you!!!')[n-1 in
>>  ...    (x for x in xrange(n) for t in [raw_input('Guess my name: 
>> ')=='Ben']
>>  ...    if not t or iter([]).next())]
> 
> 
> Okay, now in my opinion, that's just too complex to give to a newbie as 
> a suggested implementation. :)
> 
> Joal

I suppose this would be far too easy to understand, then:

pr =['Guess my name', 'Wrong, try again', 'Last chance']
for p in pr:
   name = raw_input(p+": ")
   if name == "Ben":
     print "You're right!"
     break
else:
   print "Loser: no more tries for you"

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fred.dixon at gmail.com  Sat Apr  2 10:37:24 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 2 Apr 2005 07:37:24 -0800
Subject: terminating an inactive process
References: <mailman.1238.1112455273.1799.python-list@python.org>
Message-ID: <1112456244.140844.161920@f14g2000cwb.googlegroups.com>

i use this to open/close netscape as it also doesnt like to close all
the time. its a WMI script but easiely edited.

check out script-o-matic from ms-downloads , it outputs python code as
well as others.
######################################################################
strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer &
"\root\cimv2")
Set colItems = objWMIService.ExecQuery("Select * from
Win32_Process",,48)
For Each objItem in colItems
    strProcess = Ucase(objItem.Name)
    If strProcess = "NETSCP.EXE" Then
        objItem.Terminate()
    End If
Next
'---------------------
MyVar = MsgBox ("Do you want to start Netscape Mail and News " &
chr(13) & chr(13) & "Any Zombie processes have been exorcised from the
machine already." & chr(13) & chr(13) , 308, "Warning!")
Set objWMIService = Nothing
Set colItems = Nothing
If MyVar = 7 Then
    Wscript.Quit
Else
    sExecStr = "C:\Program Files\Netscape\Netscape\Netscp.exe -mail"
    Dim oShell, obj
    Set oShell = WScript.CreateObject ("WSCript.shell")
    Set obj = oShell.exec(sExecStr)
    Set oShell = Nothing
    Set obj = Nothing
End If

'--------------------------------
MyVar = MsgBox ("Click to close Netscape")
strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer &
"\root\cimv2")
Set colItems = objWMIService.ExecQuery("Select * from
Win32_Process",,48)
For Each objItem in colItems
    strProcess = Ucase(objItem.Name)
    If strProcess = "NETSCP.EXE" Then
        objItem.Terminate()
    End If    
Next
Set objWMIService = Nothing
Set colItems = Nothing



From fabian.steels at free.fr  Mon Apr 11 09:52:45 2005
From: fabian.steels at free.fr (fabian)
Date: 11 Apr 2005 06:52:45 -0700
Subject: variables exist
Message-ID: <9622d535.0504110552.1e070e8d@posting.google.com>

how testing if a variable exists in python as isset in php??

thanks


From ville at spammers.com  Fri Apr  1 05:38:12 2005
From: ville at spammers.com (Ville Vainio)
Date: 01 Apr 2005 13:38:12 +0300
Subject: Case-insensitive dict, non-destructive, fast, anyone?
Message-ID: <du7psxen5nv.fsf@lehtori.cc.tut.fi>

I need a dict (well, it would be optimal anyway) class that stores the
keys as strings without coercing the case to upper or lower, but still
provides fast lookup (i.e. uses hash table).


>> d = CiDict([('Hi', 12),('hoho',13)])
>> d['hi']

12

>> d.keys()

['Hi','hoho']

Note that 'Hi' preserved the case. I imagine that 'Hi' and 'hi' would
need to share the same hash value in order for the lookup to be fast.

Anyone have a an implementation that I could use? Quick googling only
produced implementations that coerce all keys to lowercase.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From ksenia.marasanova at gmail.com  Mon Apr 11 03:21:12 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Mon, 11 Apr 2005 09:21:12 +0200
Subject: templating system
In-Reply-To: <ho-dnRDXra5RSMTfRVn-qQ@speakeasy.net>
References: <mailman.1644.1113148510.1799.python-list@python.org>
	<ho-dnRDXra5RSMTfRVn-qQ@speakeasy.net>
Message-ID: <130df19305041100216862c8d9@mail.gmail.com>

> In EmPy, your template would look something like this::
> 
>         <ul>
>         @[for record in records]@
>                 <li><a href="@record.id">@record.title</a></li>
>         @[end for]@
>         </ul>
> 
> Batch expanding the template would look like something as simple as
> (substituting in your example)::
> 
>         ...
>         return em.expand(open(templateFilename).read(), **locals())

Thanks!

I've read "Known issues and caveats" on the website:

"""
EmPy was primarily intended for static processing of documents, 
rather than dynamic use, and hence speed of processing was not  the
primary consideration in its design.
"""

Have you noticed any speed problems with EmPy?

-- 
Ksenia


From dresserd at gouldacademy.org  Fri Apr 29 11:34:22 2005
From: dresserd at gouldacademy.org (dresserd at gouldacademy.org)
Date: 29 Apr 2005 08:34:22 -0700
Subject: WSDL.Proxy newbie question
Message-ID: <1114788862.001735.269700@g14g2000cwa.googlegroups.com>

Hello,

I am new to implementing and consuming web services with Python.  I
have had
some success setting up a simple SOAPServer and connecting to it and
also using
some of the simpler (one parameter) web services available from
xmethods.org.
I
am currently stuck trying to use a simple hashing service that requires
more
than one parameter to be passed.  I have done a lot of searching and
tried
passing the parameters in many ways.  I think I am stuck on what type
of data
structure to pass the service.

here's the xmethod service profile
http://www.xmethods.net/ve2/ViewListing.po;jsessionid=zbLKBgtAiSjIS-KAclxRipnP(QHyMHiRM)?key=uuid:FD460436-81BF-86BD-F252-2AB6C00B624C

Below is an example attempt.  Thanks in advance for any suggestions.

Python 2.3.3 (#1, May  7 2004, 10:31:40)
[GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import SOAPpy
>>> wsdlFile = 'http://www.bs-byg.dk/hashclass.wsdl'
>>> server.soapproxy.config.dumpSOAPOut =1
>>> server.soapproxy.config.dumpSOAPIn =1
>>> server.debug = 1
>>> server.HashString({'Str':'test','HashType':'MD5'})
*** Outgoing SOAP
******************************************************
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:xsd="http://www.w3.org/1999/XMLSchema"
>
<SOAP-ENV:Body>
<HashString SOAP-ENC:root="1">
<v1>
<HashType xsi:type="xsd:string">MD5</HashType>
<Str xsi:type="xsd:string">test</Str>
</v1>
</HashString>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
************************************************************************
*** Incoming SOAP
******************************************************
<?xml version="1.0" encoding="utf-8"?><soap:Envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><HashStringResponse
xmlns="http://tempuri.org/HashService/HashClass"
/></soap:Body></soap:Envelope>
************************************************************************
<SOAPpy.Types.structType HashStringResponse at -1213191124>: {}



From __peter__ at web.de  Tue Apr  5 09:03:55 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 05 Apr 2005 15:03:55 +0200
Subject: check interpreter version before running script
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
Message-ID: <d2u2bp$og4$01$2@news.t-online.com>

rbt wrote:

> Is there a recommended or 'Best Practices' way of checking the version
> of python before running scripts? I have scripts that use the os.walk()
> feature (introduced in 2.3) and users running 2.2 who get errors.
> Instead of telling them, 'Upgrade you Python Install, I'd like to use
> sys.version or some other way of checking before running.

I like

import os

try:
    os.walk
except AttributeError:
    # implement fallback

No need to remember in which version the desired feature came to be.

Peter


From pballard at ozemail.com.au  Tue Apr  5 04:34:10 2005
From: pballard at ozemail.com.au (Peter Ballard)
Date: 5 Apr 2005 01:34:10 -0700
Subject: DIY Spam Filter in Python
References: <9d5509fa.0504040039.526c93b6@posting.google.com>
	<42517cff$0$15069$636a15ce@news.free.fr>
Message-ID: <9d5509fa.0504050034.458e7b71@posting.google.com>

Damien Wyart <damien.wyart at free.fr> wrote in message news:<42517cff$0$15069$636a15ce at news.free.fr>...
> * pballard at ozemail.com.au (Peter Ballard) in comp.lang.python:
> > Source code, and a bit of documentation, is at:
> > http://members.ozemail.com.au/~pballard/diyspamfilter.html
> 
> BTW, 2 of the 3 files are links, so missing from the tar archive...

Sigh. Murphy's Law strikes again.

The tar file is fixed now.

--
Peter


From mahs at telcopartners.com  Mon Apr 18 23:21:37 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 18 Apr 2005 20:21:37 -0700
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <16996.30734.778261.632448@montanaro.dyndns.org>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
	<16996.30734.778261.632448@montanaro.dyndns.org>
Message-ID: <d41t79$ojs$1@sea.gmane.org>

Skip Montanaro wrote:
>     steve> I propose that an additional a URL be set up for the Python HTML
>     steve> documentation.  This URL will always contain the current version
>     steve> of the documentation.  Suppose we call it "current".  Then (while
>     steve> 2.4 is still the current version) the documentation for the os
>     steve> module would also be available at
>     steve> http://python.org/doc/current/lib/module-os.html.
> 
> Time machine at work?  The above URL works for me now.
> 
...
> 
> But appears to be firefox-specific.
> 
> Skip

Works for me with both Firefox and IE6 under WinXP

Michael



From hancock at anansispaceworks.com  Sun Apr  3 19:06:18 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 3 Apr 2005 18:06:18 -0500
Subject: Help me dig my way out of nested scoping
In-Reply-To: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
Message-ID: <200504031806.18732.hancock@anansispaceworks.com>

On Sunday 03 April 2005 04:12 pm, Brendan wrote:
> from ThirdPartyLibrary import F
> from MyOtherModule import AB
> 
> def FW(x):
>     lastX = None
>     aLastX = None
>     bLastX = None

I'm pretty sure your method will work if you just specify
that these are global:

def FW(x):
    global lastX = None
    global aLastX = None
    global bLastX = None

OTOH, I'm biased against using module-level variables
for this kind of purpose and I think things that retain
state really ought to be class instances, so I'd probably replace
AB(x)  with a callable object, and define two wrappers to access it
(untested):

class AB:
    def __init__(self):
         self._last_x = None
         self._last_a = None
         self._last_b = None

    def __call__(self, x):
         if x == self._last_x:
             return self._last_a, self._last_b
         else:
             self._last_a, self._last_b = self.AB(x)
             return self._last_a, self._last_b

    def  A(self, x):
          return self(x)[0]

    def B(self, x):
         return self(x)[1]

    def AB(self, x):
         """
         This is where you compute your new values when needed.
         """
         # something that computes a and b
         return a,b

ab = AB()

Then you actually pass the methods ab.A and ab.B to your
library routine.  This will usually work, though if it somehow
insists on an actual function instead of a callable, you can always
use wrapper functions.

This also has the advantage that you *can* process more than
one case at a time (i.e. if you have two different places where you
need this function to be called and you aren't sure what order
they'll be processed (or don't want to think about it), you can
give them different instances of AB to work with, and they'll
remember their previous calls separately.

Cheers,
Terry


-- 
--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From simon.brunning at gmail.com  Mon Apr  4 08:51:23 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 4 Apr 2005 13:51:23 +0100
Subject: (win32) speedfan api control
In-Reply-To: <Kln3e.13905$e06.7165@twister.socal.rr.com>
References: <Kln3e.13905$e06.7165@twister.socal.rr.com>
Message-ID: <8c7f10c6050404055148907888@mail.gmail.com>

On Apr 2, 2005 3:22 AM, tlviewer <tlviewer at yahoo.com> wrote:
(Snip Windows GUI automation stuff.)

WATSUP includes a module for Windows GUI automation. It's probably
worth a look - it might save you from doing all the research that I
had to do!

http://www.tizmoi.net/watsup/intro.html

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From kbk at shore.net  Thu Apr 14 14:43:28 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Thu, 14 Apr 2005 14:43:28 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200504141843.j3EIhSNw007456@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  314 open ( +6) /  2824 closed ( +5) /  3138 total (+11)
Bugs    :  898 open (+16) /  4921 closed ( +8) /  5819 total (+24)
RFE     :  177 open ( +1) /   151 closed ( +0) /   328 total ( +1)

New / Reopened Patches
______________________

typos in rpc.py  (2005-04-09)
CLOSED http://python.org/sf/1179503  opened by  engelbert gruber

[AST] Fix for core in test_grammar.py  (2005-04-08)
       http://python.org/sf/1179513  opened by  logistix

no html file for modulefinder  (2005-04-10)
       http://python.org/sf/1180012  opened by  George Yoshida

fix typos in Library Reference  (2005-04-10)
       http://python.org/sf/1180062  opened by  George Yoshida

great improvement for locale.py formatting functions  (2005-04-10)
       http://python.org/sf/1180296  opened by  Georg Brandl

clarify behavior of StringIO objects when preinitialized  (2005-04-10)
CLOSED http://python.org/sf/1180305  opened by  Georg Brandl

st_gen and st_birthtime support for FreeBSD  (2005-04-11)
       http://python.org/sf/1180695  opened by  Antti Louko

binary formats for marshalling floats  (2005-04-11)
       http://python.org/sf/1180995  opened by  Michael Hudson

make float packing copy bytes when they can  (2005-04-12)
       http://python.org/sf/1181301  opened by  Michael Hudson

range() in for loops, again  (2005-04-12)
       http://python.org/sf/1181334  opened by  Armin Rigo

HMAC hexdigest and general review  (2005-04-13)
       http://python.org/sf/1182394  opened by  Shane Holloway

Patches Closed
______________

Complex commented  (2005-04-06)
       http://python.org/sf/1177597  closed by  loewis

typos in rpc.py  (2005-04-08)
       http://python.org/sf/1179503  closed by  rhettinger

clarify behavior of StringIO objects when preinitialized  (2005-04-10)
       http://python.org/sf/1180305  closed by  rhettinger

Improved output for unittest failUnlessEqual  (2003-04-22)
       http://python.org/sf/725569  closed by  purcell

[AST] Generator expressions  (2005-03-21)
       http://python.org/sf/1167628  closed by  bcannon

New / Reopened Bugs
___________________

256 should read 255 in operator module docs  (2005-04-06)
CLOSED http://python.org/sf/1178255  opened by  Dan Everhart

operator.isMappingType and isSequenceType on instances  (2005-04-06)
CLOSED http://python.org/sf/1178269  opened by  Dan Everhart

Erroneous line number error in Py2.4.1  (2005-04-07)
       http://python.org/sf/1178484  opened by  Timo Linna

configure: refuses setgroups  (2005-04-07)
       http://python.org/sf/1178510  opened by  zosh

2.4.1 breaks pyTTS  (2005-04-07)
       http://python.org/sf/1178624  opened by  Dieter Deyke

Variable.__init__ uses self.set(), blocking specialization  (2005-04-07)
       http://python.org/sf/1178863  opened by  Emil

Variable.__init__ uses self.set(), blocking specialization  (2005-04-07)
       http://python.org/sf/1178872  opened by  Emil

IDLE bug - changing shortcuts  (2005-04-08)
       http://python.org/sf/1179168  opened by  Przemys&#322;aw Gocy&#322;a

can't import thru cygwin symlink  (2005-04-08)
       http://python.org/sf/1179412  opened by  steveward

Missing def'n of equality for set elements  (2005-04-09)
CLOSED http://python.org/sf/1179957  opened by  Skip Montanaro

codecs.readline sometimes removes newline chars  (2005-04-02)
       http://python.org/sf/1175396  reopened by  doerwalter

locale.format question  (2005-04-10)
CLOSED http://python.org/sf/1180002  opened by  Andrew Ma

test_posix fails on cygwin  (2005-04-10)
       http://python.org/sf/1180147  opened by  Henrik Wist

subprocess.Popen fails with closed stdout  (2005-04-10)
       http://python.org/sf/1180160  opened by  neuhauser

broken pyc files  (2005-04-10)
       http://python.org/sf/1180193  opened by  Armin Rigo

Python keeps file references after calling close methode  (2005-04-10)
       http://python.org/sf/1180237  opened by  Eelco

expanding platform module and making it work as it should  (2005-04-10)
       http://python.org/sf/1180267  opened by  Nikos Kouremenos

StringIO's docs should mention overwriting of initial value  (2005-04-10)
CLOSED http://python.org/sf/1180392  opened by  Leif K-Brooks

BaseHTTPServer uses deprecated mimetools.Message  (2005-04-11)
       http://python.org/sf/1180470  opened by  Paul Jimenez

lax error-checking in new-in-2.4 marshal stuff  (2005-04-11)
       http://python.org/sf/1180997  opened by  Michael Hudson

Bad sys.executable value for bdist_wininst install script  (2005-04-12)
       http://python.org/sf/1181619  opened by  follower

asyncore.loop() documentation  (2005-04-13)
       http://python.org/sf/1181939  opened by  Graham

re.escape(s) prints wrong for chr(0)  (2005-04-13)
       http://python.org/sf/1182603  opened by  Nick Jacobson

dir() does not include _  (2005-04-13)
       http://python.org/sf/1182614  opened by  Nick Jacobson

ZipFile __del__/close problem with longint/long files  (2005-04-14)
       http://python.org/sf/1182788  opened by  Robert Kiendl

Bugs Closed
___________

256 should read 255 in operator module docs  (2005-04-06)
       http://python.org/sf/1178255  closed by  rhettinger

operator.isMappingType and isSequenceType on instances  (2005-04-06)
       http://python.org/sf/1178269  closed by  rhettinger

GNU readline 4.2 prompt issue  (2002-12-30)
       http://python.org/sf/660083  closed by  mwh

non-ascii readline input crashes python  (2004-08-14)
       http://python.org/sf/1009263  closed by  mwh

readline+no threads   (2003-09-24)
       http://python.org/sf/811844  closed by  mwh

compiler module didn't get updated for "class foo():pass"  (2005-04-03)
       http://python.org/sf/1176012  closed by  bcannon

Missing def'n of equality for set elements  (2005-04-09)
       http://python.org/sf/1179957  closed by  rhettinger

locale.format question  (2005-04-10)
       http://python.org/sf/1180002  closed by  andrewma

StringIO's docs should mention overwriting of initial value/  (2005-04-10)
       http://python.org/sf/1180392  closed by  rhettinger

New / Reopened RFE
__________________

making builtin exceptions more informative  (2005-04-13)
       http://python.org/sf/1182143  opened by  Sebastien de Menten



From trasno-owner at ceu.fi.udc.es  Mon Apr  4 16:35:31 2005
From: trasno-owner at ceu.fi.udc.es (trasno-owner at ceu.fi.udc.es)
Date: Mon, 04 Apr 2005 22:35:31 +0200
Subject: Mail Delivery System
Message-ID: <mailman.565.1112646931.572.trasno@ceu.fi.udc.es>

You are not allowed to post to this mailing list, and your message has
been automatically rejected.  If you think that your messages are
being rejected in error, contact the mailing list owner at
trasno-owner at ceu.fi.udc.es.

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From kristian.zoerhoff at gmail.com  Tue Apr 26 20:52:20 2005
From: kristian.zoerhoff at gmail.com (Kristian Zoerhoff)
Date: Tue, 26 Apr 2005 19:52:20 -0500
Subject: Fwd: how to find the drive in python/cygwin?
In-Reply-To: <426E9E0E.1020905@little-lisper.org>
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
Message-ID: <3511dc7505042617524edd244a@mail.gmail.com>

Forwarding to list, as you forgot to Reply-all (Don't worry, we all do
it at least once!).

---------- Forwarded message ----------
From: Mayer Goldberg <gmayer at little-lisper.org>
Date: Apr 26, 2005 3:01 PM
Subject: Re: how to find the drive in python/cygwin?
To: Kristian Zoerhoff <kristian.zoerhoff at gmail.com>


Dear Kristian:

Thanks for the very fast reply! I wasn't thinking of the mount command
-- this is really the correct way to think about my problem.

>>My program needs to run on an external media that comes with Cygwin on
>>it. I have no control over what drive is assigned to that media, but
>>for some reason, I do need to know the letter.
>
> Why?

Basically this has to do with moving around: I use different computers
throughout the day, and need to carry with me a sane and productive
computing environment. Rebooting to linux is not an option for me, so I
need a Windows solution. I found it in the form of a 40G pocket hard
drive with a USB connection. I plug in the connection, go to my software
subdirectory and run what I need. I have a mixture of Unix and Windows
programs, and often I have to run a Windows program instead of a unix
program (for example, I run miktex instead of the tetex that comes with
cygwin). The Windows utilities need to be passed arguments in DOS
format, i.e., something like G:\FOO\foo.dll. Cygwin is only one specific
application I use, so I didn't install everything under the / (which
would have solved many problems for me!). As a result, I need to know
the drive letter.

Thanks again,

Mayer


-- 
Kristian

kristian.zoerhoff(AT)gmail.com
zoerhoff(AT)freeshell.org


From theaney at cablespeed.com  Mon Apr 25 22:00:29 2005
From: theaney at cablespeed.com (Tim Heaney)
Date: Mon, 25 Apr 2005 22:00:29 -0400
Subject: Quote-aware string splitting
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
Message-ID: <87oec2e1qa.fsf@mrbun.watterson>

"J. W. McCall" <jmccall at houston.rr.com> writes:
>
> I need to split a string as per string.strip(), but with a
> modification: I want it to recognize quoted strings and return them as
> one list item, regardless of any whitespace within the quoted string.
>
> For example, given the string:
>
> 'spam "the life of brian" 42'
>
> I'd want it to return:
>
> ['spam', 'the life of brian', '42']
>
> I see no standard library function to do this, so what would be the
> most simple way to achieve this?  This should be simple, but I must be
> tired as I'm not currently able to think of an elegant way to do this.
>
> Any ideas?

How about the csv module? It seems like it might be overkill, but it
does already handle that sort of quoting

  >>> import csv
  >>> csv.reader(['spam "the life of brian" 42'], delimiter=' ').next()
  ['spam', 'the life of brian', '42']



From gh at ghaering.de  Mon Apr  4 19:39:03 2005
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Tue, 05 Apr 2005 01:39:03 +0200
Subject: change extensions
In-Reply-To: <4251cef9@dnews.tpgi.com.au>
References: <4251cef9@dnews.tpgi.com.au>
Message-ID: <4251D017.2040808@ghaering.de>

Bob Then wrote:
> how can i change all files from one extension to another within a direcory?

Using os.listdir, os.path.split and os.rename.

-- Gerhard


From prabapython at yahoo.co.in  Fri Apr 22 03:35:33 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Fri, 22 Apr 2005 08:35:33 +0100 (BST)
Subject: regarding system function
In-Reply-To: 6667
Message-ID: <20050422073533.28224.qmail@web8408.mail.in.yahoo.com>


--- Robert Kern <rkern at ucsd.edu> wrote:
> praba kar wrote:
> > Dear All,
> > 
> >      In Php If I send a command to system function
> > then It will return 1 on success and 0 on failure.
>  So
> > based upon that value I can to further work.
> > 
> >      But In Python If I send a command to system
> > function then It will return 0 only for both
> > conditions(success and failure).
> 
> Are you sure about that?
> 
> In [3]:os.system('cat foo')
> cat: foo: No such file or directory
> Out[3]:256
> 

I agree above statement but When I delete a directory
os.system('rm -rf test')
0
if directory is not present then I again try to
delete
os.system('rm -rf test') 
now this time also It will print
0


________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From viznut at charter.net  Mon Apr 25 23:27:10 2005
From: viznut at charter.net (Randall Hopper)
Date: Mon, 25 Apr 2005 22:27:10 -0500
Subject: Python callbacks & PyGILState_Release()
In-Reply-To: <slrnd6q0gf.k9c.dek@bosshog.lbl.gov>
References: <mailman.2334.1114226424.1799.python-list@python.org>
	<vf6dadh3.fsf@python.net>
	<mailman.2345.1114265296.1799.python-list@python.org>
	<slrnd6q0gf.k9c.dek@bosshog.lbl.gov>
Message-ID: <20050426032710.GB13345@charter.net>

David E. Konerding DSD staff:
 |Randall Hopper wrote:
 |> Is there a clean way to save the full exception state in the callback
 |> before the PyGILState_Release(), and restore it when we return across the
 |> C++ wrapper?
...
 |I saved the exception state by retrieveing it from sys.exc_info(), which
 |contains all the traceback object data as Python variable.  I think you can
 |get the same info from your C++ callback wrapper, and use PyErr_Fetch and
 |PyErr_Restore to save and restore the exception sate.

Ok, thanks.  I'll give this a shot!

Randy


From robin at reportlab.com  Mon Apr 25 11:55:57 2005
From: robin at reportlab.com (Robin Becker)
Date: Mon, 25 Apr 2005 16:55:57 +0100
Subject: regex over files
In-Reply-To: <426D08BC.1040703@klix.ch>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
Message-ID: <426D130D.6040400@chamonix.reportlab.co.uk>

Gerald Klix wrote:
> Map the file into RAM by using the mmap module.
> The file's contents than is availabel as a seachable string.
> 

that's a good idea, but I wonder if it actually saves on memory? I just tried 
regexing through a 25Mb file and end up with 40Mb as working set (it rose 
linearly as the loop progessed through the file). Am I actually saving anything 
by not letting normal vm do its thing?

> HTH,
> Gerald
> 
> Robin Becker schrieb:
> 
>> Is there any way to get regexes to work on non-string/unicode objects. 
>> I would like to split large files by regex and it seems relatively 
>> hard to do so without having the whole file in memory. Even with 
>> buffers it seems hard to get regexes to indicate that they failed 
>> because of buffer termination and getting a partial match to be 
>> resumable seems out of the question.
>>
>> What interface does re actually need for its src objects?
> 
> 


-- 
Robin Becker



From claird at lairds.us  Mon Apr  4 13:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Mon, 04 Apr 2005 17:08:03 GMT
Subject: Sending keytrokes to Windows app
References: <42511F4B.40702@btk.utu.fi>
	<mailman.1288.1112614206.1799.python-list@python.org>
Message-ID: <eb88i2-1lc.ln1@lairds.us>

In article <mailman.1288.1112614206.1799.python-list at python.org>,
Simon Brunning  <simon at brunningonline.net> wrote:
>On Apr 4, 2005 12:04 PM, Marten Hedman <marten.hedman at btk.utu.fi> wrote:
>> I am trying to control a Windows application from a python script with
>> SendKeys and Python 2.3.
>
>WATSUP might be worth a look, instead...
>
>http://www.tizmoi.net/watsup/intro.html
			.
			.
			.
More references:  <URL: http://wiki.tcl.tk/8813 >.


From casevh at comcast.net  Fri Apr  1 12:14:01 2005
From: casevh at comcast.net (casevh at comcast.net)
Date: 1 Apr 2005 09:14:01 -0800
Subject: ANN: BigDecimal - decimal arithmetic on very large intergers
References: <032720052340.23979.42474457000403FA00005DAB220699973508900A9C0E0C@comcast.net>
	<mailman.1183.1112362032.1799.python-list@python.org>
Message-ID: <1112375640.957543.282190@z14g2000cwz.googlegroups.com>

M.-A. Lemburg wrote:
> casevh at comcast.net wrote:
> > BigDecimal is a Python class that supports decimal arithmetic on
very large integers. BigDecimal was inspired by the posting of BigDec
to c.l.py by Tim Peters. BigDecimal implements all the commonly used
integer methods. (It doesn't implement any of the binary/shifting
operations.)
> >
> > It has been optimized for performance. It uses a 4x4 Toom-Cook
algorithm for multiplication and a new, very fast, division algorithm.
If GMPY is available, it will be automatically used.
> >
> > Performance examples, computing the decimal represendation of the
42nd Mersenne prime:
> >     2**25964951 - 1
> >
> > Tim Peter's posting to c.l.py: 13 minutes 41 seconds
> > BigDecimal: 59 seconds
> > BigDecimal w/gmpy: 10 seconds
>
> You might want to look into mxNumber (part of the
egenix-mx-experimental
> package):
>
> 	http://www.egenix.com/files/python/mxNumber.html
>
> There's a C type called Integer in that package that basically
> wraps the GMP integer type.
>
> --
> Marc-Andre Lemburg
> eGenix.com
>
> Professional Python Services directly from the Source  (#1, Apr 01
2005)
> >>> Python/Zope Consulting and Support ...
http://www.egenix.com/
> >>> mxODBC.Zope.Database.Adapter ...
http://zope.egenix.com/
> >>> mxODBC, mxDateTime, mxTextTools ...
http://python.egenix.com/
>
________________________________________________________________________
>
> ::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,FreeBSD for free !
::::

I have used mxNumber in the past. This library uses "super" digits with
hundreds / thousands of decimal digits and then builds builds
multiplication and division on those. The original motivation was that
the conversion time to / from decimal string format is O(n) instead of
O(n^2).

Using just native Python long support, the 4-way Toom-Cook
multiplication algorithm is faster than the built-in multiplication
when the numbers are several hundred thousand digits long. On my
machine, it is roughly twice as fast when multiplying one million digit
numbers. (The 4-way Toom-Cook is O(n^~1.4) versus O(n^~1.585) for the
Karatsuba multiplication in Python.)

The division algortihm in BigDecimal is effectively O(n^~1.4) also.
Using just native Python long support, the division algorithm is faster
than the built-in division algorithm when the numbers are several tens
of thousands digits long.

Interestingly, BigDecimal can do division faster than GMP 3.1.x with
numbers approximately 10 million digits in length. BigDecimal is faster
than GMP 4.1.4 with numbers of approximately 1 million digits in
length. (GMP 4 is faster for small, ~10,000 digits, than GMP 3, but
grows more quickly.)

casevh



From wnebfynj at mnovryyb.pbz  Tue Apr 12 09:17:07 2005
From: wnebfynj at mnovryyb.pbz (JZ)
Date: Tue, 12 Apr 2005 15:17:07 +0200
Subject: os.open() i flaga lock
References: <12ff5c7es4cwa$.1fpe48svo59a1$.dlg@40tude.net>
Message-ID: <9se17ni2zulz.1tvoh66h4ipkp$.dlg@40tude.net>

Dnia Tue, 12 Apr 2005 15:14:25 +0200, JZ napisa?(a):

> Szukam jakiego? odpowiednika fcntl na win32. W manualu napisali ?e
> os.open() z odpowiedni? flag? jest bardziej uniwersalne od fcntl. Niestety
> zero informacji na temat tej flagi oraz brak jakiegokolwiek przyk?adu... :(

Sorry, I wanted to send to another group. because I cannot remove the post,
I provide simple translation:

I am looking for function similar ro fcnt but for win32. I've found brief
info in manual about os.open() which should work with specific flag value.
But I cannot find any info abotu that flag and no examples at all. :(

--
JZ


From jeffrey at fro.man  Sun Apr 17 02:28:13 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Sat, 16 Apr 2005 23:28:13 -0700
Subject: Decorator Syntax For Recursive Properties
Message-ID: <11640g942e65da1@corp.supernews.com>

Consider the following class:

class Node(object):
    def __init__(self, name, parent=None):
        self.name = name
        self.parent = parent

    def _ancestors(self, ants=None):
        if ants is None:
            ants = []
        else:
            ants.insert(0, self.name)
        if self.parent is None:
            return ants
        return self.parent._ancestors(ants)
    ancestors = property(_ancestors)

The ancestor property generates a list ancestor nodes by having each parent
examine its own name recursively. The recursion is managed by calling the
method underlying the parent property, rather than calling the property
directly.

Is it possible to rewrite this property using decorator syntax? Does the
@property decorator create some underlying method that I can call directly?

Alternately, perhaps there is a way to rewrite the recursion so that such a
call is unnecessary? Note that the property should not add its own name if
it is the originating node (the node trying to find _its_ ancestors). So
something like this didn't work for me:

    @property
    def ancestors(self):
        if self.parent is None:
            return [self.name]
        return [self.name] + self.parent.ancestors

In other words, since there is no longer a list passing from child to parent
during the recursion, is there a graceful way to examine the state of the
ancestor list so far?


Thanks,
Jeffrey


From tores at stud.cs.uit.no  Wed Apr 20 11:20:26 2005
From: tores at stud.cs.uit.no (Tor Erik Sønvisen)
Date: Wed, 20 Apr 2005 17:20:26 +0200
Subject: logging to two files
Message-ID: <d45rvr$rrm$1@news.uit.no>

Hi

Have the following code:
import logging

        logging.basicConfig(level = logging.DEBUG,
                            format = '[%(levelname)-8s %(asctime)s] 
%(message)s',
                            filename = 'rfs.log',
                            filemode = 'w')

When using logging.(debug, info etc) stuff is logged to rfs.log.
How may I specify another log with different charateristics, such as a 
different file

regards 




From perle at cs.tu-berlin.de  Thu Apr  7 13:50:07 2005
From: perle at cs.tu-berlin.de (Frank Wilde)
Date: 7 Apr 2005 17:50:07 GMT
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<1498066.d23UzBfE8y@yahoo.com> <3b5ui7F6h0vgtU1@individual.net>
Message-ID: <d33rsf$9ng$1@news.cs.tu-berlin.de>

Ulrich Hobelmann wrote:
> alex goldman wrote:

>> I personally think GOTO was unduly criticized by Dijkstra. With the
>> benefit of hindsight, we can see that giving up GOTO in favor of
>> other primitives failed to solve the decades-old software crisis.

> The fault of goto in imperative languages is that it has no
> arguments, thus creating spaghetti of gotos and assignments.
>
> Continuations rule!

While continuations are a very interesting abstraction, the improvement
of structured programming was to be able to prove properties of your
programs in time linear to the size of the program instead of quadratic.
I don't see how giving arguments to the GOTO would help there.

Ciao,
	Perle


From newsgroups at jhrothjr.com  Thu Apr 21 22:31:47 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 21 Apr 2005 21:31:47 -0500
Subject: deprecation of has_key?
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>	<mailman.2224.1114094137.1799.python-list@python.org>	<TIKdnV6iPosyIPrfRVn-2w@comcast.com><mailman.2226.1114095804.1799.python-list@python.org><dfWdnZdcUZbqX_rfRVn-vw@comcast.com>
	<mailman.2254.1114121746.1799.python-list@python.org>
Message-ID: <116gojl7je5jq10@news.supernews.com>

"Terry Reedy" <tjreedy at udel.edu> wrote in message 
news:mailman.2254.1114121746.1799.python-list at python.org...
>
> "Steven Bethard" <steven.bethard at gmail.com> wrote in message 
> news:dfWdnZdcUZbqX_rfRVn-vw at comcast.com...
>> Ahh, ok.  Now I understand.  I think you could probably search the 
>> python-dev archives and see why the decision was made as it was.  For 
>> pretty much all my purposes, "key in dict" is much more useful than "item 
>> in dict".  Practicality beats Purity and all. ;)
>
> In '[for] x in mydict:', x could potentially be key, value, or item-pair. 
> All three were considered and discussed -- I believe on clp-- and key 
> chosen as the most useful.  A specific analogy brought forth was the phone 
> book, a mapping of names to phone number and maybe address.  The decision 
> was definite closer to a coin-toss to a no-brainer.

I actually use the item-pair more frequently, but it's not
something that concerns me overmuch. I don't really worry
about a few extra keystrokes; just a whole lot of extra
keystrokes.

John Roth
>
> Terry J. Reedy
>
>
> 



From kay.schluehr at gmx.net  Sat Apr 30 12:24:52 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 30 Apr 2005 09:24:52 -0700
Subject: New Python website
In-Reply-To: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
Message-ID: <1114878292.384982.272050@o13g2000cwo.googlegroups.com>


lpe wrote:
> http://www.pycode.com
>
> I was kinda suprised when I could not find any good sites with 3rd
> party modules (other than the Vaults of Parnassus, where you must
host
> files elsewhere), so I decided to write one myself :)

Maybe You shot a bit fast? PiPy is good and the Vaults are good. Link
them makes them better, though not very innovative. Someone told me
that I'm on the Web here, am I?

> It is brand new and might still be buggy, but hopefully it will be
> usefull to some people.  Feel free to join and upload any of your
code.
> thanks

When I was younger I found anarchy cool. Now I find it grey.

Ciao,
Kay



From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 17 09:25:04 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 17 Apr 2005 15:25:04 +0200
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <4261c943.136032804@news.oz.net>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
	<Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>
	<4261c943.136032804@news.oz.net>
Message-ID: <3cf2qfF6jo33oU1@individual.net>

Bengt Richter wrote:

> Stretching for it, using my latest and greatest ;-)
> 
>     y = f(**::
>            x = 1
>            y = 'y for f'
>         )*g(**::
>            x = 'x for g'
>            y = 'y for g'
>            def foo(): return 'foo for g'
>         )
> 
> Note that there is no problem adding other parameters, because ::<suite> is just
> a unary expression returning dict subtype instance, e.g.,
> 
>     y = f(11,22,**::
>            x = 1
>            y = 'y for f'
>         )*g(*args_from_somewhere, **::
>            x = 'x for g'
>            y = 'y for g'
>            def foo(): return 'foo for g'
>         )

You know that this is dead ugly?

The real ``problem'' (if you see one) is that the indentation syntax
doesn't allow for suites in expressions.

Reinhold


From enleverlesO.OmcO at OmclaveauO.com  Tue Apr 26 01:55:54 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Tue, 26 Apr 2005 07:55:54 +0200
Subject: Import DiscID on Windows
References: <mailman.2499.1114484739.1799.python-list@python.org>
Message-ID: <426dd9d4$0$814$8fcfb975@news.wanadoo.fr>

Hi !


Look  ctypes, for call the DLLs


@-salutations
-- 
Michel Claveau





From martin at v.loewis.de  Sat Apr 16 12:58:21 2005
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sat, 16 Apr 2005 18:58:21 +0200
Subject: unicode "em space" in regex
In-Reply-To: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>
References: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>
Message-ID: <4261442D.1010800@v.loewis.de>

Xah Lee wrote:
> how to represent the unicode "em space" in regex?

You will have to pass a Unicode literal as the regular expression,
e.g.

 fracture=re.split(u'\u2003*\\|\u2003*',myline,re.U)

Notice that, in raw Unicode literals, you can still use \u to
escape characters, e.g.

 fracture=re.split(ur'\u2003*\|\u2003*',myline,re.U)

Regards,
Martin


From robin at SPAMREMOVEjessikat.fsnet.co.uk  Tue Apr 26 16:54:53 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Tue, 26 Apr 2005 20:54:53 +0000
Subject: regex over files
In-Reply-To: <mailman.2543.1114545234.1799.python-list@python.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
Message-ID: <426EAA9D.2050904@jessikat.fsnet.co.uk>

Skip Montanaro wrote:
...
> If I mmap() a file, it's not slurped into main memory immediately, though as
> you pointed out, it's charged to my process's virtual memory.  As I access
> bits of the file's contents, it will page in only what's necessary.  If I
> mmap() a huge file, then print out a few bytes from the middle, only the
> page containing the interesting bytes is actually copied into physical
> memory.
....
my simple rather stupid experiment indicates that windows mmap at least 
will reserve 25Mb of paged file for a linear scan through a 25Mb file. I 
probably only need 4096b to scan. That's a lot less than even the page 
table requirement. This isn't rocket science just an old style observation.
-- 
Robin Becker


From bill.oldroyd at bl.uk  Fri Apr  1 11:58:30 2005
From: bill.oldroyd at bl.uk (bill.oldroyd at bl.uk)
Date: 1 Apr 2005 08:58:30 -0800
Subject: Shelve DBRunRecoveryError
Message-ID: <1112374710.796497.14280@o13g2000cwo.googlegroups.com>

Can anyone help with this error message when using Shelve : Python 2.4.

Traceback (most recent call last):
  File "C:\Python24\CollectB\dataparser.py", line 743, in -toplevel-
    base.create()
  File "C:\Python24\CollectB\dataparser.py", line 252, in create
    self.dataStore[i] = v
  File "C:\Python24\lib\shelve.py", line 130, in __setitem__
    self.dict[key] = f.getvalue()
  File "C:\Python24\lib\bsddb\__init__.py", line 218, in __setitem__
    self.db[key] = value
DBRunRecoveryError: (-30978, 'DB_RUNRECOVERY: Fatal error, run database
recovery -- PANIC: Invalid argument')

Bill



From Facundo.Batista at telefonicamoviles.com.ar  Mon Apr 11 12:43:01 2005
From: Facundo.Batista at telefonicamoviles.com.ar (Batista, Facundo)
Date: Mon, 11 Apr 2005 13:43:01 -0300
Subject: ANNOUNCE: SiGeFi v0.3.1
Message-ID: <A128D751272CD411BC9200508BC2194D053C8237@escpl.tcp.com.ar>


We're proud to announce the 0.3.1 version of SiGeFi, which you can find
at:

	http://sourceforge.net/projects/sigefi

	
What is SiGeFi?
---------------

SiGeFi is a Financial Management System, with focus in the needs of
the administration of the money in each personal life and house.

Always keeping the easy usage and concepts, SiGeFi has features of a 
complex Management system:

- Complies with Double Entry Accounting

- Has a Budget-based Money Distribution system

- Allow to make Loans between accounts (with associated financial
  costs)

And of course, it's completely written in Python (didn't decided the
GUI yet).


What is in this version?
------------------------

GUI:
- Main window, with the full menu structure.
- Opening of a database and accounts' tree loading.

Internal changes:
- Specified the start-up procedure.
- Implemented consistency controls in the Persistence layer.
- Bugfixing (mainly with exchange rates constraints).

Created a "demo" application that shows how to work with the core by hand,
useful as documentation, and allows to create datasets for GUI testing.

See roadmap.txt to find out the milestone for each version, and TODO.txt
for more detail.

Be aware that most of the documentation is not translated yet, it's only
in Spanish.


What can I expect for the next version?
---------------------------------------

More work in the GUI:

- Finish the main windows, the interaction core of the program.
- Add shortcuts.
- Integrate a toolbar.


How can I help?
---------------

In a thousand ways, there's a lot of things to do: documentation,
fixing code, translations, set up the web page, etc...

If you want to participate, send us a mail to the list 
(sigefi-list at lists.sourceforge.net) or directly to us.


Thank you.

.    Facundo

Bit?cora De Vuelo: http://www.taniquetil.com.ar/plog
PyAr - Python Argentina: http://pyar.decode.com.ar/


  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
ADVERTENCIA.

La informaci?n contenida en este mensaje y cualquier archivo anexo al mismo,
son para uso exclusivo del destinatario y pueden contener informaci?n
confidencial o propietaria, cuya divulgaci?n es sancionada por la ley.
Si Ud. No es uno de los destinatarios consignados o la persona responsable
de hacer llegar este mensaje a los destinatarios consignados, no est?
autorizado a divulgar, copiar, distribuir o retener informaci?n (o parte de
ella) contenida en este mensaje. Por favor notif?quenos respondiendo al
remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo.
Todas las opiniones contenidas en este mail son propias del autor del
mensaje y no necesariamente coinciden con las de Telef?nica Comunicaciones
Personales S.A. o alguna empresa asociada.
Los mensajes electr?nicos pueden ser alterados, motivo por el cual
Telef?nica Comunicaciones Personales S.A. no aceptar? ninguna obligaci?n
cualquiera sea el resultante de este mensaje.
Muchas Gracias.
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From jelleferinga at gmail.com  Tue Apr 26 17:21:22 2005
From: jelleferinga at gmail.com (jelle)
Date: 26 Apr 2005 14:21:22 -0700
Subject: how to pass an array to a VB array via COM
In-Reply-To: <8y358mqj.fsf@python.net>
References: <1114515084.138728.26180@g14g2000cwa.googlegroups.com>
	<8y358mqj.fsf@python.net>
Message-ID: <1114550482.213271.103030@z14g2000cwz.googlegroups.com>

Thomas,

No, i went over the syntax extensively. The syntax is
RS.AddCurve(points, degree), so 3 represents the degree of a bezier
curve. I'm doing fine with all types of functions which use 2 x,y,z
coords, but all arrays -tuple of tuples- fail. The odd thing is that
when i use RS.GetPoints() which is a method to get back user-defines
x,y,z points, i get a tuple of tuples containing these points. Though
when i write these back to the program,  all fails:

I admit posting this problem also to the more specific python-win32
group, though no response there yet...

>>>s = RS.GetPoints()
>>>s
((-7.0, -30.0, 0.0), (15.0, -24.0, 0.0), (-7.0, 12.0, 0.0), (14.0,
29.0,
0.0), (28.0, 10.0, 0.0), (20.0, 1.0, 0.0))

Cool, I get to choose points in the GUI, right back into python,
wicked!
Though when I send these points back to the app:
RS.AddPolyline(s)
The same error all over again:
---
Traceback (most recent call last):
  File "<input> ", line 1, in ?
  File "c:\Python23\lib\site-packages\jf\interface\RhinoScript.py",
line
129, in AddPolyline
    return self._ApplyTypes_(85, 1, (12, 0), ((12, 0),), 'AddPolyline',
None,vaPoints)
  File "c:\Python23\lib\site-packages\win32com\client\__init__.py",
line
446, in _ApplyTypes_
    return self._get_good_object_(
com_error: (-2147352567, 'Exception occurred.', (6, 'RhinoScript_m',
'Type
mismatch in parameter.  One-dimensional array required.', 'C:\\Program
Files\\Rhinoceros 3.0\\RhinoScript_m.HLP', 393222, 0), None)
---



From simon.brunning at gmail.com  Tue Apr 19 11:58:31 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 19 Apr 2005 16:58:31 +0100
Subject: [Python-Dev] How do you get yesterday from a time object
In-Reply-To: <20050419153446.30407.qmail@web60116.mail.yahoo.com>
References: <20050419153446.30407.qmail@web60116.mail.yahoo.com>
Message-ID: <8c7f10c6050419085830e4e7cc@mail.gmail.com>

On 4/19/05, Ralph Hilton <flinkkettel at yahoo.com> wrote:
> i'm a beginning python programmer.
> 
> I want to get the date for yesterday
> 
> nowTime = time.localtime(time.time())
> print nowTime.
> oneDay = 60*60*24 # number seconds in a day
> yday = nowTime - oneDay  # <-- generates an error
> print yday.strftime("%Y-%m-%d")

today = datetime.date.today()
previous_working = today - datetime.timedelta(days=1)

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From ajikoe at gmail.com  Wed Apr  6 05:29:40 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 6 Apr 2005 02:29:40 -0700
Subject: Establishing connection SSH
Message-ID: <1112779780.058547.270960@o13g2000cwo.googlegroups.com>

Hello all,

I have one computer and 1 server.
I have login and password.
The only way I can connect to server is using SSH protocol.
I usually use Winscp3 to connect to the server (by providing login and
password).
Now I would like to connect to the server directly using python code.
How can I establish connection ?
Can I run something in the server and take the result back?

Sincerely Yours,
Pujo



From __peter__ at web.de  Tue Apr  5 08:59:08 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 05 Apr 2005 14:59:08 +0200
Subject: copying a file in the python script
References: <1112678460.464474.82610@z14g2000cwz.googlegroups.com>
	<2ZadndRAcawiGs_fRVn-ig@comcast.com>
Message-ID: <d2u22p$og4$01$1@news.t-online.com>

Larry Bates wrote:

> If you are moving the file to another directory on the same hard
> drive (e.g. same filesystem) you can use os.rename(old, new) and
> the file doesn't have to be copied at all. This is more efficient.
> If you are copying to another filesystem, you must use shutil.copy
> and os.remove (or os.unlink).

Or use shutil.move() which implements the strategy you describe.

Peter 



From fdreger at amiga.pl  Sat Apr 23 17:30:24 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Sat, 23 Apr 2005 23:30:24 +0200
Subject: func_code vs. string problem
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
	<d4easv$rgm$1@nemesis.news.tpi.pl>
	<QvKdnZAEj5TEKfffRVn-oQ@comcast.com>
Message-ID: <d4ef1b$ml4$1@nemesis.news.tpi.pl>


Uzytkownik "Steven Bethard" <steven.bethard at gmail.com> napisal w 
wiadomosci news:QvKdnZAEj5TEKfffRVn-oQ at comcast.com...
> Filip Dreger wrote:
>> I am trying to find a way of executing functions without creating a 
>> nested scope, so they can share local and global namespace (even if 
>> they are declared in some other module).
>
> Why?  Can you explain what the use case is?

I have a large set of objects of a single class - 'actor'. They are 
created all at once, and they all live in a sort of container written 
in C. The methods of the functions are few and general. One of them is 
simply 'act()', that is called by the C program every X seconds (tics, 
whatever).
Each object can play 0..N roles, and the roles played by an object 
often change during its lifetime. The roles should be played in the 
act() method. Also, the roles should be defined in some simple way, 
and in an external python file (so adding/removing roles does not 
require recompiling of the parts embedded in C).

If I had a magic function 'exec in current scope' I would implement it 
like this:

class actor:
  def __init__():
    self.roles=[]
  def act():
    for i in self.roles:
      exec i in current scope

then the roles would simply be functions defined in any importable 
file. For example creating an actor that logs each time it is called 
would be as simple as:

import actor

def log():
  self.counter+=1
  print "called %d times"%self.counter

a=actor.actor()
a.counter=0
a.roles.append(log)

Let me recapitulate (is that the right English word?):
1. I need to keep the definitions of roles in a separate file (they 
can not simply be additional methods)
2. I need the roles to have full access to global and local namespace 
of the actor object (sometimes they have to change it, and sometimes 
they have to use some external modules) - the roles should work like 
plugins.
3. I guess I also need a fresh look at the problem. Maybe I am simply 
going the wrong way? I am more than willing to change my design, if 
someone shows me the light :-)

regards,
Filip Dreger 




From gabriel.barros at gmail.com  Mon Apr 11 09:05:49 2005
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Mon, 11 Apr 2005 10:05:49 -0300
Subject: workaround for generating gui tools
In-Reply-To: <4259c2ed.60213392@news.oz.net>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<4259c2ed.60213392@news.oz.net>
Message-ID: <5175a81c050411060515786e54@mail.gmail.com>

On Apr 10, 2005 11:08 PM, Bengt Richter <bokr at oz.net> wrote:
> On Sat, 9 Apr 2005 19:22:16 +0200, "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>     open('mywidget_v2.txt','w').write(repr(mywidget.textview)

How about a pickle hook?

You'd just unpack the pickle data, and end up with a pointer to a
frame(?) containing all the goods, then just .pack() it into whatever
you want.


From donmcdaniel2005 at yahoo.com  Fri Apr 29 10:49:39 2005
From: donmcdaniel2005 at yahoo.com (Donald L McDaniel)
Date: Fri, 29 Apr 2005 07:49:39 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
Message-ID: <#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>

MC05 wrote:
> "sheltech" <quasara at earthlink.net> wrote in message
> news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
>>
>> "MC05" <smokerdude66 at myway.com> wrote in message
>> news:3dc8hjF6s5i2uU1 at individual.net...
>>>
>>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>>>>
>>>> 4) I doubt seriously whether God plays a guitar, since guitars are
>>>> made by men, for men.  His Son could theoretically play a guitar. 
>>>> Perhaps He does. Perhaps He doesn't.  Only the Father and His Holy
>>>> Angels know.
>>>
>>> So then Lucifer was a wicked bass player whose sex and drugs and
>>> rock n roll alientated the rest of the band and was fired?
>>>
>>>
>>>
>>
>> "Fired" ....  good one
>
> Heh.  Can't take credit for an accident.  Your eye is better than
> mine. :)

The Devil has been fired...by God Himself.  Read the Book of Revelation in 
the New Testament:  Satan's end is clearly outlined by the Angel Jesus sent 
to St. John.  This end is very clear:  he will be cast alive into the Lake 
which burns with fire and brimstone, where he will be tormented day and 
night forever.

Not only Satan and his angels will be cast into the Lake, but all those who 
follow him and his servants.  I assure you, Satan won't be ruling anyone in 
the Fire.  He will be in just as much torment as his followers.  Neither 
will he have any sort of job.

I strongly advise you to stop making fun of things you have no understanding 
of.  Your eternal destiny depends on the way you treat others.

-- 
Donald L McDaniel
Please reply to the original thread,
so that the thread may be kept intact.
============================== 




From steven.bethard at gmail.com  Wed Apr 13 03:13:40 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 01:13:40 -0600
Subject: Doubt regarding sorting of a list specific field
In-Reply-To: <mailman.1817.1113371391.1799.python-list@python.org>
References: <mailman.1817.1113371391.1799.python-list@python.org>
Message-ID: <6omdnTAhJfc-W8HfRVn-oQ@comcast.com>

praba kar wrote:
>     I have doubt regarding sorting. I have a list
> that list have another list (eg)
> 
> list = [[1234,'name1'],[2234,'name2'],[0432,'name3']]
> 
> I want to sort only numeric value having array field.
> How I need to do for that. 

In Python 2.4:

py> import operator
py> seq = [(1234,'name1'),(2234,'name2'),(1432,'name3')]
py> seq.sort(key=operator.itemgetter(0))
py> seq
[(1234, 'name1'), (1432, 'name3'), (2234, 'name2')]

Note that I've changed your name 'list' to 'seq' since 'list' is 
shadowing the builtin list function in your code, and I've changed your 
nested lists to tuples because they look like groups of differently 
typed objects, not sequences of similarly typed objects.  See:

http://www.python.org/doc/faq/general.html#why-are-there-separate-tuple-and-list-data-types

That said, the code I've given will still work if you shadow the builtin 
list or if you use lists instead of tuples.

STeVe


From tjreedy at udel.edu  Tue Apr 26 12:31:31 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 26 Apr 2005 12:31:31 -0400
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org>
Message-ID: <d4lq35$jaq$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:d4kh4q$tqf$1 at domitilla.aioe.org...

> Now I understand that Python bytecodes are only dealing with pure python 
> source codes.

Then stop blaming (machine-independent) CPython 'bytecodes' for any 
problems you have with compiled-to-machine-language C extensions, which 
have nothing to do with bytecodes.  Bytecodes also have nothing directly to 
do with source-code compatibility. 





From dcrespo at gmail.com  Fri Apr 22 15:38:23 2005
From: dcrespo at gmail.com (dcrespo)
Date: 22 Apr 2005 12:38:23 -0700
Subject: PDF Printing support from Python
In-Reply-To: <116iihncpcr5057@corp.supernews.com>
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
Message-ID: <1114198703.935948.286720@o13g2000cwo.googlegroups.com>

Hi Grant Edwards...

Your solution requires a previous installation of Acrobat. Internally,
the OS is sending the pdf file to the Acrobat PDF Driver and then it is
sent to the printer. So you have to have Acrobat installed. Don't you?
I want to avoid it installing a module that could do it (maybe I'm
dreaming:( ). If there's no solution, then I will be very sad :-S

This is what exactly I need to do:
Generate an invoice of 216cm width and 93cm height (1/3 of the height
of a letter paper size), and print it respecting these dimensions. So,
when I print this page on a dot matrix printer, it stops at those 93cm
of height for continuous printing.

What I tried:
I created a pdf file manually with these dimensions, and right-click on
the pdf file, and selected "print". It just work under Windows XP with
Acrobat Reader 7.0, but I want to do it from a Win98 as well.
Unfortunately, there's no Acrobat version under Win98 (the maximun is
5.1) that supports this kind of printing (what I had seen until now).
It prints, but the all paper at letter size :(

Any help? Any other tools? Any one like Cristal Report but for Python?
I heard that wxPython supports some kind of reporting, but I don't know
it. Anyone knows?

Daniel



From could.net at gmail.com  Tue Apr  5 04:42:11 2005
From: could.net at gmail.com (could ildg)
Date: Tue, 5 Apr 2005 16:42:11 +0800
Subject: Is it possible to distinguish between system environment variables
	and the user ones?
Message-ID: <311b5ce1050405014276d17aff@mail.gmail.com>

To a environment variable in Windows, can python know if it is a
system environment
variable or a current-user environment variable?
-- 
????????????????????
????????????????
????????


From robin at SPAMREMOVEjessikat.fsnet.co.uk  Fri Apr 29 03:51:25 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Fri, 29 Apr 2005 07:51:25 +0000
Subject: regex over files
In-Reply-To: <d4smkl$7be$04$1@news.t-online.com>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<17008.19697.939514.53469@montanaro.dyndns.org>
	<mailman.0.1114733851.14961.python-list@python.org>
	<d4smkl$7be$04$1@news.t-online.com>
Message-ID: <4271E77D.400@jessikat.fsnet.co.uk>

Peter Otten wrote:
> Robin Becker wrote:
> 
> 
>>#sscan1.py thanks to Skip
>>import sys, time, mmap, os, re
>>fn = sys.argv[1]
>>fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
>>s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
>>l=n=0
>>t0 = time.time()
>>for mat in re.split("XXXXX", s):
> 
> 
> re.split() returns a list, not a generator, and this list may consume a lot
> of memory.
> 
> 
..... that would certainly be the case and may answer why the simple way is so
bad for larger memory. I'll have a go at this experiment as well. My original
intention was to find the start of each match as a scanner would and this would
certainly do that. However, my observation with the trivial byte scan would seem
to imply that just scanning the file causes vm problems (at least in xp). I suppose it's
hard to explain to the os that I actually only need the relevant few pages.
-- 
Robin Becker


From steve at holdenweb.com  Fri Apr  8 10:23:30 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 10:23:30 -0400
Subject: Interpreter problem
In-Reply-To: <425684F8.5060507@novasyshealth.com>
References: <425684F8.5060507@novasyshealth.com>
Message-ID: <425693E2.5070903@holdenweb.com>

Greg Lindstrom wrote:
> I am using python 2.3.5 on a Linux system and have an odd problem 
> dealing with the 'sha-bang' line.  I have a file, driver.py which starts 
> with
> 
> #!/usr/bin/python
> 
> and works fine (that is, when I type in ./driver.py at the command 
> prompt the file runs as expected).  I have another file, myotherfile.py 
> which starts with the exact same line (#!/usr/bin/python) but I get
> 
> : bad interpreter: No such file or directory
> 
There's almost certainly a carriage return as well as a newline in the 
shebang line.

[...]

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From mefjr75 at hotmail.com  Wed Apr 27 12:37:57 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 27 Apr 2005 09:37:57 -0700
Subject: names of methods, exported functions
In-Reply-To: <d4o6t6$n6r$1@gemini.csx.cam.ac.uk>
References: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
	<d4nmv1$f5d$1@gemini.csx.cam.ac.uk> <426f9552.44993106@news.oz.net>
	<d4o6t6$n6r$1@gemini.csx.cam.ac.uk>
Message-ID: <1114619877.485916.232570@l41g2000cwc.googlegroups.com>


Michael Hoffman wrote:
> Bengt Richter wrote:
>
> > Using help: (BTW, it would be nice to have some keyword arguments
for help to filter down
> > information to exclude what may not be interesting)
>
> No kidding. What do you think the output should look like in that
case?
>
> I think we don't need the mro, or any of the magic methods inherited
> from the builtin.
> --
> Michael Hoffman

The help code is part of pydoc, IIRC, feel free to have a go at it ;)
M.E.Farmer



From auch-ich-m at g-kein-spam.com  Tue Apr  5 12:25:27 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Tue, 05 Apr 2005 18:25:27 +0200
Subject: re module non-greedy matches broken
References: <mailman.1308.1112637220.1799.python-list@python.org><1153658nrs82j13@corp.supernews.com>
	<d2tc04$84s$1@news.web.de> <1155e6jgesiik5d@corp.supernews.com>
Message-ID: <1480458.f8Wn7Cg56C@news.perlig.de>

* lothar wrote:

> a non-greedy match - as implicitly defined in the documentation - is a
> match in which there is no proper substring in the return which could also
> match the regex.

Your argumentation is starting at the wrong place. The documentation doesn't
define the bahviour, it tries to describe it (wrongly, as said).

> you are skirting the issue as to why a matcher should not be able to
> return a non-greedy match.
> 
> there is no theoretical reason why it can not be done.

I'm sure, you can explain the theory behind regexps in order to substantiate
your statement.

*shrug*

nd


From greg at cosc.canterbury.ac.nz  Thu Apr  7 01:15:31 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 07 Apr 2005 17:15:31 +1200
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <4253fe0c$1@nntp0.pdx.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com> <4253fe0c$1@nntp0.pdx.net>
Message-ID: <3bjtvuF6d00nnU2@individual.net>

Scott David Daniels wrote:
> Aahz wrote:
> 
>> You just can't have your cake and eat it, too.
> 
> I've always wondered about this turn of phrase.  I seldom
> eat a cake at one sitting.

You need to recursively subdivide the cake until
you have a piece small enough to fit in your input
buffer. Then the atomicity of the cake-ingestion
operation will become apparent.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From mage at mage.hu  Sun Apr 24 08:08:55 2005
From: mage at mage.hu (Mage)
Date: Sun, 24 Apr 2005 14:08:55 +0200
Subject: postgresql modules and performance
Message-ID: <426B8C57.1030802@mage.hu>

          Hello,

I started to write my PostgreSQL layer. I tried pyPgSQL and PyGreSQL. I
made a *very minimal* performance test and comparsion with the same
thing in php. Table "movie" has 129 record and many fields.

I found PyGreSQL / DB-API / fetchall horrible slow (32 sec in my test).
PHP did 13 secs and it gave the result in associative array. Maybe I did
something bad.

pyPgSQL / DB-API raised a futurewarning and didn't worked.

pyPgSQL / libpg worked well. I can create php-like dictionary result in
14 secs.

Here is the code. It's only a test...

       Mage

------ test.py --------
import mpypg
import datetime

print 'This is a python postgesql module'

db = mpypg.mpypgdb('dbname=test host=localhost')

def test():
    res = db.query('select * from movie')
    #print res['fields']
    #print res['rows']
    #pass

def test2():
    res = db.query('select * from movie')
    #print res['fields']
    #print len(res['rows'])
    #print res['rows']
    print len(res)
    print res[1]

start = datetime.datetime.now()

for i in range(100):
  test()
    #pass
   
end = datetime.datetime.now()

print end - start
   
test2()

------ mpypg.py --------
from pyPgSQL import libpq
from pyPgSQL import PgSQL
import sys
import pgdb

mpypg_connect_error_message = 'Could not connect to the database'
mpypg_query_error_message = 'Could not run the query'

class mpypgdb:
    'my database class'
    def __init__(self,str):
        try:
            self.database = libpq.PQconnectdb(str)
        except:
            mpypg_error_msg(mpypg_connect_error_message)
   
    def query(self,query):
        try:
            res = self.database.query(query)
            fields = tuple([res.fname(i) for i in range(res.nfields)])
            rows = []
           
            '''
            for name in fields:           
                rows[name] = []
           
           
            for i in range(res.ntuples):
                for j in range(len(fields)):
                    rows[fields[j]].append(res.getvalue(i,j))
            '''
            '''
            for j in range(len(fields)):
                rows[fields[j]] = tuple([res.getvalue(i,j) for i in
range(res.ntuples)])
            '''
           
            for i in range(res.ntuples):
                rows.append(dict([(fields[j], res.getvalue(i,j)) for j
in range(len(fields))]))
           
            res.clear()
            result = {'fields': fields, 'rows': rows}
            return result;
        except:
            mpypg_error_msg(mpypg_query_error_message)
           
       
class mpgdb:
    'my database class'
    def __init__(self,str):
        try:
            self.database = pgdb.connect(database='test')
        except:
            mpypg_error_msg(mpypg_connect_error_message)
   
    def query(self,query):
        try:
            cursor = self.database.cursor()
            res = cursor.execute(query)
           
            #result = {'fields': fields, 'rows': cursor.fetchall()}
            result = [cursor.fetchone() for i in range(cursor.rowcount)]
           
            #result = cursor.fetchall()
            return result;
        except:
            mpypg_error_msg(mpypg_query_error_message)
           


def mpypg_error_msg(message):
    'Database error handler'
    sys.exit(message)




From davidf at sjsoft.com  Tue Apr 12 05:08:35 2005
From: davidf at sjsoft.com (David Fraser)
Date: Tue, 12 Apr 2005 11:08:35 +0200
Subject: Why does StringIO discard its initial value?
In-Reply-To: <g9m6e.6295$ff4.1793@trndny08>
References: <XEb6e.556$Cz3.49700@monger.newsread.com>
	<g9m6e.6295$ff4.1793@trndny08>
Message-ID: <d3g36e$4oh$1@ctb-nnrp2.saix.net>

Raymond Hettinger wrote:
> [Leif K-Brooks]
> 
>>The obvious workaround is to call buffer.write() with the initial value
>>instead of passing it to StringIO's constructor,
> 
> 
> More than just a workaround, it is the preferred approach.
> That makes is easier to switch to cStringIO where initialized objects are
> read-only.
> 

Others may find this helpful ; it's a pure Python wrapper for cStringIO 
that makes it behave like StringIO in not having initialized objects 
readonly. Would it be an idea to extend cStringIO like this in the 
standard library? It shouldn't lose performance if used like a standard 
cStringIO, but it prevents frustration :-)

David

class StringIO:
     def __init__(self, buf = ''):
         if not isinstance(buf, (str, unicode)):
             buf = str(buf)
         self.len = len(buf)
         self.buf = cStringIO.StringIO()
         self.buf.write(buf)
         self.buf.seek(0)
         self.pos = 0
         self.closed = 0

     def __iter__(self):
         return self

     def next(self):
         if self.closed:
             raise StopIteration
         r = self.readline()
         if not r:
             raise StopIteration
         return r

     def close(self):
         """Free the memory buffer.
         """
         if not self.closed:
             self.closed = 1
             del self.buf, self.pos

     def isatty(self):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         return False

     def seek(self, pos, mode = 0):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         self.buf.seek(pos, mode)
         self.pos = self.buf.tell()

     def tell(self):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         return self.pos

     def read(self, n = None):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         if n == None:
           r = self.buf.read()
         else:
           r = self.buf.read(n)
         self.pos = self.buf.tell()
         return r

     def readline(self, length=None):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         if length is not None:
             r = self.buf.readline(length)
         else:
             r = self.buf.readline(length)
         self.pos = self.buf.tell()
         return r

     def readlines(self):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         lines = self.buf.readlines()
         self.pos = self.buf.tell()
         return lines

     def truncate(self, size=None):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         self.buf.truncate(size)
         self.pos = self.buf.tell()
         self.buf.seek(0, 2)
         self.len = self.buf.tell()
         self.buf.seek(self.pos)

     def write(self, s):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         origpos = self.buf.tell()
         self.buf.write(s)
         self.pos = self.buf.tell()
         if origpos + len(s) > self.len:
           self.buf.seek(0, 2)
           self.len = self.buf.tell()
           self.buf.seek(self.pos)

     def writelines(self, lines):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         self.buf.writelines(lines)
         self.pos = self.buf.tell()
         self.buf.seek(0, 2)
         self.len = self.buf.tell()
         self.buf.seek(self.pos)

     def flush(self):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         self.buf.flush()

     def getvalue(self):
         if self.closed:
             raise ValueError, "I/O operation on closed file"
         return self.buf.getvalue()


From hgk at et.uni-magdeburg.de  Thu Apr 14 02:33:42 2005
From: hgk at et.uni-magdeburg.de (Hans Georg Krauthaeuser)
Date: Thu, 14 Apr 2005 08:33:42 +0200
Subject: Newbie Tkinter Question
In-Reply-To: <d3l1c3$42n$04$1@news.t-online.com>
References: <425d9284$0$572$ed2e19e4@ptn-nntp-reader04.plus.net>
	<d3l1c3$42n$04$1@news.t-online.com>
Message-ID: <d3l2s6$4hv$1@fuerst.cs.uni-magdeburg.de>

Peter Otten schrieb:
> Pseud O'Nym wrote:
> 
> 
>>the following fragment doesn't cause any errors and results in buttons the
>>correct size for the images, but the buttons don't work, and the images
>>aren't displayed. If I add a text property, and remove the images, they
>>work fine, so the rest of my code's OK. I've searched this group and
>>Python.org to no avail.
>>
>>class App:
>>  def __init__(self, master):
>>    frame = Frame(master)
>>    frame.pack(side=LEFT, fill=Y)
>>    image1 = PhotoImage(file='button_a.gif')
>>    self.button = Button(frame, image=image1)
>>    self.button.pack(side=TOP)
> 
> 
>       self.image = image1
> 
> 
>>Can anyone enlighten me?
> 
> 
> For reasons that are beyond me widgets do not increase the reference count
> of a PhotoImage. Therefore you have to put a reference to the image
> elsewhere, e. g. into the App instance, to prevent it from being
> garbage-collected when the image1 variable goes out of scope.
> 
> Peter
> 
Because I stumbled across the same 'feature' just recently, I think it's
good to give a reference...

>From http://tkinter.unpythonic.net/wiki/Images

"Something that seems to bite every new Tkinter programmer at least
once: you've loaded a PhotoImage, applied it to a Button, Label, or
other widget, and nothing shows up - because you referenced the image
only via a local variable, so it went out of scope and got deleted
before the widget ever appeared. The usual solution is to store a
reference to the image as an attribute of the widget that is to display it.

You might just call this a bug in Tkinter, but the reality isn't quite
that simple... Tk images are not first-class objects: when you apply one
to a widget, you do not in any sense "pass a reference to" the image.
Instead, you just pass a name, which Tk looks up in an internal table of
defined images (from which images can only be deleted manually). From
Tkinter, passing a PhotoImage as a parameter actually only sends the
str() of the image object to the Tcl side: this is just a string, the
randomly-generated name assigned when the object was created. "No
reference to the image itself" means "no reference counting" means "no
way for the Python side to be notified when the image is truly no longer
used". If Tkinter didn't delete images when no Python reference to them
existed, they would be unavoidable memory leaks.
..."

Hans Georg


From aahz at pythoncraft.com  Tue Apr 19 14:21:42 2005
From: aahz at pythoncraft.com (Aahz)
Date: 19 Apr 2005 11:21:42 -0700
Subject: Proposal: an unchanging URL for Python documentation
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
	<1113914904.034233.192720@z14g2000cwz.googlegroups.com>
Message-ID: <d43i7m$gvo$1@panix1.panix.com>

In article <1113914904.034233.192720 at z14g2000cwz.googlegroups.com>,
Steve <steve at ferg.org> wrote:
>
>http://docs.python.org/modindex.html
>
>and there also is
>
>http://python.org/doc/current/modindex.html
>
>Anybody know why there are two different URLs?
>
>Which one should be considered the "official" current documentation
>URL?  (REASON: A person wanting to Wikalong annotate the "official"
>current documentation URL would want to know which one to annotate.)

I'd consider the official URL to be

http://www.python.org/doc/current/modindex.html

The primary reason for creating docs.python.org was to make Google
searches easier.  I believe the eventual intent is to make that the
official URL, but there were some glitches in setting it up and I'm not
sure whether they've been completely ironed out.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From steve at holdenweb.com  Thu Apr 21 14:13:37 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 14:13:37 -0400
Subject: python classes/file structure
In-Reply-To: <1114103206.925440.218520@l41g2000cwc.googlegroups.com>
References: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>	<mailman.2229.1114097050.1799.python-list@python.org>
	<1114103206.925440.218520@l41g2000cwc.googlegroups.com>
Message-ID: <d48q81$kq0$1@sea.gmane.org>

codecraig wrote:
> Thanks, but I am not familiar with the "__all__" variable, could u give
> me an example?
> 
> Without using, __all__....would i do this in my __init__.py?
> 
> import MyCustomWidget1
> import MyCustomWidget2
> import MyCustomWidget3
> 
> etc?
> 
Yes, correct. __all__ just limits the names that are imported into the 
receiving namespace with "from module import *".

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bronger at physik.rwth-aachen.de  Wed Apr 20 11:52:18 2005
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 20 Apr 2005 17:52:18 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<s9zu0m1mpry.fsf@thetis.intevation.de>
Message-ID: <87fyxlqwct.fsf@wilson.rwth-aachen.de>

Hall?chen!

Bernhard Herzog <bh at intevation.de> writes:

> Torsten Bronger <bronger at physik.rwth-aachen.de> writes:
>
>> It's interesting to muse about a language that starts at "1" for
>> all arrays and strings, as some more or less obsolete languages
>> do.  I think this is more intuitive, since most people (including
>> mathematicians) start counting at "1".  The reason for starting
>> at "0" is easier memory address calculation, so nothing for
>> really high level languages.
>
> There are very good reasons for half-open intervals and starting
> at 0 apart from memory organization.  Dijkstra explained this
> quite well in
> http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF

I see only one argument there: "Inclusion of the upper bound would
then force the latter to be unnatural by the time the sequence has
shrunk to the empty one."  While this surely is unaesthetical, I
don't think that one should optimise syntax according to this very
special case.  Besides, no language I know of has probems with
negative values.

Well, and the argument for "0" derives from that, according to
Dijkstra.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus


From removethis.kartic.krishnamurthy at gmail.com  Wed Apr 13 16:50:25 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Wed, 13 Apr 2005 20:50:25 GMT
Subject: permission
In-Reply-To: <425c8b44$1@dnews.tpgi.com.au>
References: <425c8b44$1@dnews.tpgi.com.au>
Message-ID: <lCf7e.1586$HK6.501@newssvr33.news.prodigy.com>

James said the following on 4/12/2005 11:00 PM:
> Is it possible to check if you have permission to access and or change a
> directory or file?


James - You can use the access() in the os module.

import os

print os.access('C:\\', os.R_OK | os.W_OK) # check for read/write access
# hopefully print True
print os.access('C:\\noexist.file', os.R_OK) # Check no existent file
# will print False
print os.access('C:\\Docume~1\\anotheruser\\Mydocu~1', os.R_OK) # Read 
another users documents folder
# should print False if no read access

Please read http://docs.python.org/lib/os-file-dir.html for more info.

Thanks,
-Kartic


From achrist at easystreet.com  Sat Apr  9 14:00:08 2005
From: achrist at easystreet.com (Al Christians)
Date: Sat, 09 Apr 2005 11:00:08 -0700
Subject: ntvdm problem on win2k
Message-ID: <115g61r25jhbaac@corp.supernews.com>

I started having some problems running python programs (python 2.3) from 
the Win2k command line.  I would get crashes with an NTVDM error.  Even 
just executing python would cause it.  I upgraded to python 2.3.5, and 
no difference.  When I rearranged my path to move cygwin and a bunch of 
other stuff (.net, etc) after C:\python23, the problem went away.

Is this problem known to anyone but me?  Any diagnosis, solution of 12 
or fewer steps, or support group?   If I'm distributing python programs 
(python 2.3.5 packaged with py2exe) should I warn or notify the 
recipients that this is a possible problem with the programs?

TIA

Al


From tom at dtsam.com  Thu Apr 21 13:13:48 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Thu, 21 Apr 2005 12:13:48 -0500
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
	<TIOdnQkhrMfcTPrfRVn-uA@telcove.net> <d48ktk$4ov$1@news.vcd.hp.com>
	<1114102481.963973.252500@g14g2000cwa.googlegroups.com>
Message-ID: <GqednSsPlsZ1Q_rfRVn-sQ@telcove.net>

"codecraig" <codecraig at gmail.com> wrote in message
news:1114102481.963973.252500 at g14g2000cwa.googlegroups.com...
> I found some benchmarking (perhaps simple) but search for "The Great
> Computer language shootout" ....look at the original shootout and the
> win32 one.
>
> Thomas:
> "I doubt the total execution time for all the RegEx queries you ever
> ran took
> as much time as you just wasted on your little experiment. " .....no
> need to be angry.  I don't have some "little experiment", but thanks
> for being concerned about me wasting my time.
>
> I do understand that python is certainly easier to read, no doubt.  I
> was just doing some research to find out about speed/performance
> between the two.
>
> But thanks for pointing out, again, that Pyton is easier to read.
> (let's just not forget that python is great for other things other than
> just readability.)

Your quite welcome.
BUT I didn't say a word about readability.

I claimed it was easier to *write*.
Thomas Bartkus




From bokr at oz.net  Wed Apr 20 06:19:24 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 10:19:24 GMT
Subject: Behaviour of str.split
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
	<3cm7t9F6nuiooU1@individual.net> <d455dk$spi$1@ctb-nnrp2.saix.net>
Message-ID: <42662833.48350644@news.oz.net>

On Wed, 20 Apr 2005 10:55:18 +0200, David Fraser <davidf at sjsoft.com> wrote:

>Greg Ewing wrote:
>> Will McGugan wrote:
>> 
>>> Hi,
>>>
>>> I'm curious about the behaviour of the str.split() when applied to 
>>> empty strings.
>>>
>>> "".split() returns an empty list, however..
>>>
>>> "".split("*") returns a list containing one empty string.
>> 
>> 
>> Both of these make sense as limiting cases.
>> 
>> Consider
>> 
>>  >>> "a b c".split()
>> ['a', 'b', 'c']
>>  >>> "a b".split()
>> ['a', 'b']
>>  >>> "a".split()
>> ['a']
>>  >>> "".split()
>> []
>> 
>> and
>> 
>>  >>> "**".split("*")
>> ['', '', '']
>>  >>> "*".split("*")
>> ['', '']
>>  >>> "".split("*")
>> ['']
>> 
>> The split() method is really doing two somewhat different things
>> depending on whether it is given an argument, and the end-cases
>> come out differently.
>> 
>You don't really explain *why* they make sense as limiting cases, as 
>your examples are quite different.
>
>Consider
> >>> "a*b*c".split("*")
>['a', 'b', 'c']
> >>> "a*b".split("*")
>['a', 'b']
> >>> "a".split("*")
>['a']
> >>> "".split("*")
>['']
>
>Now how is this logical when compared with split() above?

The trouble is that s.split(arg) and s.split() are two different functions.

The first is 1:1 and reversible like arg.join(s.split(arg))==s
The second is not 1:1 nor reversible: '<<various whitespace>>'.join(s.split()) == s ?? Not usually.

I think you can do it with the equivalent whitespace regex, preserving the splitout whitespace
substrings and ''.joining those back with the others, but not with split(). I.e.,

 >>> def splitjoin(s, splitter=None):
 ...     return (splitter is None and '<<whitespace>>' or splitter).join(s.split(splitter))
 ...
 >>> splitjoin('a*b*c', '*')
 'a*b*c'
 >>> splitjoin('a*b', '*')
 'a*b'
 >>> splitjoin('a', '*')
 'a'
 >>> splitjoin('', '*')
 ''
 >>> splitjoin('a b    c')
 'a<<whitespace>>b<<whitespace>>c'
 >>> splitjoin('a b    ')
 'a<<whitespace>>b'
 >>> splitjoin('  b    ')
 'b'
 >>> splitjoin('')
 ''

 >>> splitjoin('*****','*')
 '*****'
Note why that works:

 >>> '*****'.split('*')
 ['', '', '', '', '', '']
 >>> '*a'.split('*')
 ['', 'a']
 >>> 'a*'.split('*')
 ['a', '']

 >>> splitjoin('*a','*')
 '*a'
 >>> splitjoin('a*','*')
 'a*'

Regards,
Bengt Richter


From tzot at sil-tec.gr  Thu Apr 14 10:22:48 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 14 Apr 2005 17:22:48 +0300
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<425e47a9$0$26352$db0fefd9@news.zen.co.uk>
	<mailman.1886.1113479564.1799.python-list@python.org>
Message-ID: <v4vs51hm5d0jailbuif4m34hjfjoh9028a@4ax.com>

On Thu, 14 Apr 2005 13:49:22 +0200, rumours say that "Fredrik Lundh"
<fredrik at pythonware.com> might have written:

>Will McGugan wrote:
>
>> Please implement this as a Python module. I would like to compress my mp3 collection to single 
>> bits.
>
>here's the magic algorithm (somewhat simplified):

[snip algo [0]]

Well, I take advantage of this "folding" idea for years now.  Do you
remember DoubleSpace?  I was getting to the limits [1] of my 100 MiB
hard disk, so I was considering upgrading my hardware.  A female friend
of mine, knowing a little but not a lot about MS-DOS asked the
eye-opening question: "why don't you reapply double space to the
compressed drive?"

I was enlightened.

Of course, a couple of weeks ago I had a bad sector which destroyed 800
KiB right in the middle of _Echoes_, but I had my whole Pink Floyd
collection on a 5.25 floppy (zip of zip of zip of...)


[0] -- btw, in your code, Fredrik:
"""file = open(keycode + ".out", "wb")""".replace("keycode", "filename")

[1] disk space -- the final frontier
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From skip at pobox.com  Mon Apr 11 12:44:05 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 11 Apr 2005 11:44:05 -0500
Subject: Thoughts on some stdlib modules
In-Reply-To: <d3cq4b$t9u$1@sea.gmane.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<425999BD.7050308@v.loewis.de> <d3c88t$r27$1@sea.gmane.org>
	<200504102212.19392.hancock@anansispaceworks.com>
	<d3cq4b$t9u$1@sea.gmane.org>
Message-ID: <16986.43349.305695.807402@montanaro.dyndns.org>


    >> I guess the other thing to compare to is something like SciPy, which
    >> is a kind of specialized distribution of Python for scientific
    >> applications.

    Robert> No, Scipy is just a (large) package. Enthon, on the other hand,
    Robert> is just such a distribution.

I'm sorry, you lost me there.  What's the difference between a large package
and a distribution?

Skip


From rkern at ucsd.edu  Wed Apr 27 17:35:50 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 27 Apr 2005 14:35:50 -0700
Subject: Lexicographical sort for numarray
In-Reply-To: <1114636258.399427.181330@f14g2000cwb.googlegroups.com>
References: <uOSdnUooRt4OufLfRVn-sg@comcast.com>	<1114635125.849049.309880@l41g2000cwc.googlegroups.com>	<mailman.2601.1114635965.1799.python-list@python.org>
	<1114636258.399427.181330@f14g2000cwb.googlegroups.com>
Message-ID: <d4p09f$7k2$1@sea.gmane.org>

Jason Mobarak wrote:
> It does what the OPs example does, but with numeric types.

It certainly does not.

In [15]:arr = na.arange(100)

In [16]:random.shuffle(arr)

In [17]:arr.shape = (10,10)

In [18]:arr2 = na.array(arr)

In [19]:L = arr.tolist()

In [20]:L.sort()

In [21]:na.array(L)
Out[21]:
array([[ 8, 22, 40, 85, 64, 20, 91, 76, 19, 56],
        [11, 83, 86, 51, 72, 17, 80, 35,  1, 18],
        [13, 62,  0, 95, 25, 28,  5, 78, 54, 55],
        [41, 44, 15, 24, 27, 97, 31, 75, 65, 29],
        [45, 57, 16, 89, 87, 90, 42, 50, 93,  9],
        [53, 21, 47, 69,  2, 12, 92, 98, 66, 48],
        [70, 79, 36, 88, 10, 39, 81, 61, 43,  3],
        [74, 37, 49, 14, 33, 34, 52, 23, 96, 71],
        [82, 67, 30, 60,  6, 73, 99, 94,  7, 58],
        [84, 63,  4, 46, 26, 32, 59, 38, 68, 77]])

In [22]:arr2.flat.sort()

In [23]:arr2
Out[23]:
array([[ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9],
        [10, 11, 12, 13, 14, 15, 16, 17, 18, 19],
        [20, 21, 22, 23, 24, 25, 26, 27, 28, 29],
        [30, 31, 32, 33, 34, 35, 36, 37, 38, 39],
        [40, 41, 42, 43, 44, 45, 46, 47, 48, 49],
        [50, 51, 52, 53, 54, 55, 56, 57, 58, 59],
        [60, 61, 62, 63, 64, 65, 66, 67, 68, 69],
        [70, 71, 72, 73, 74, 75, 76, 77, 78, 79],
        [80, 81, 82, 83, 84, 85, 86, 87, 88, 89],
        [90, 91, 92, 93, 94, 95, 96, 97, 98, 99]])

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From kent37 at tds.net  Sat Apr 30 13:35:51 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 30 Apr 2005 13:35:51 -0400
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <4273A36B.5010501@i.com.ua>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
	<d4tbib$cb9$1@news.tsystems.kiev.ua>
	<427255b4$1_3@newspeer2.tds.net> <4273A36B.5010501@i.com.ua>
Message-ID: <4273bd7f$1_1@newspeer2.tds.net>

Maksim Kasimov wrote:
> 
> sorry for my question, but i've read the documentation, and can't find 
> where is the explanation of how it is exactly works (but of course i do 
> believe you). If it is buit in function, can i see the source code of 
> the method to find it out?
> 
> Kent Johnson wrote:
>> http://docs.python.org/lib/built-in-funcs.html

 From the above page:
open(  	filename[, mode[, bufsize]])
     An alias for the file() function above.

file(  	filename[, mode[, bufsize]])
     Return a new file object (described in section 2.3.9, ``File Objects'').

>> http://docs.python.org/lib/bltin-file-objects.html

2.3.9 File Objects

next(  	)
     A file object is its own iterator, for example iter(f) returns f (unless f is closed). When a 
file is used as an iterator, typically in a for loop (for example, for line in f: print line), the 
next() method is called repeatedly. This method returns the next input line, or raises StopIteration 
when EOF is hit. <etc>

or look at Objects/fileobject.c in the source code.

Kent


From radam2 at tampabay.rr.com  Wed Apr 20 11:24:21 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Wed, 20 Apr 2005 15:24:21 GMT
Subject: pre-PEP: Simple Thunks
In-Reply-To: <86u0m1udf3.fsf@guru.mired.org>
References: <3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
	<3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
	<Pine.A41.4.61b.0504171920010.34498@dante69.u.washington.edu>
	<eve761hv7vjktfppqb51eigi9otl0fldh6@4ax.com>
	<Pine.A41.4.61b.0504181043530.113056@dante74.u.washington.edu>
	<p4696196246vskcj3bua373fpvbf64hd2o@4ax.com>
	<86u0m1udf3.fsf@guru.mired.org>
Message-ID: <Fuu9e.9951$5f.1570@tornado.tampabay.rr.com>

Mike Meyer wrote:
> Ron_Adam <radam2_ at _tampabay.rr.com> writes:
> 
>>Here's yet another way to do it, but it has some limitations as well.
>>
>>import pickle
>>def pickle_it(filename, obj, commands):
>>    try:
>>        f = open(filename, 'r')    
>>        obj = pickle.load(f)
>>        f.close()
>>    except IOError:
>>        pass 	
>>    for i in commands:
>>        i[0](i[1])
>>    f = open(filename, 'w')
>>    pickle.dump(obj, f)
>>    f.close()
>> 
>>file = 'filename'
>>L = []
>>
>>opps = [ (L.append,'more data'),
>>         (L.append,'even more data') ]
>>pickle_it(file, L, opps)
> 
> 
> Um - it doesn't look like this will work. You pass L in as the "obj"
> paremeter, and then it gets changed to the results of a
> pickle.load. However, you call L.append in the for loop, so the data
> will be appended to L, not obj. You'll lose an list elements that were
> in the pickle.
> 
>    <mike

Hmmm, you are correct. :-/

I was trying to not use eval().  This could be made to work, but it will 
get messy, which is another reason not to do it.

Cheers,
Ron


From dcrespo at gmail.com  Thu Apr  7 11:22:12 2005
From: dcrespo at gmail.com (dcrespo)
Date: 7 Apr 2005 08:22:12 -0700
Subject: Distributing Python Apps and MySQL
Message-ID: <1112887332.324949.318960@z14g2000cwz.googlegroups.com>

Hi there... I want to distribute my python apps and the MySQL Database
in the easiest way possible. I mean a user just run the installation
file and all is automaticly installed. Any suggestions?

My knowledge: I know, as many of you, that there's py2exe for compiling
python apps for running under Windows. But what about the database
structure and data? I think it could be reached through a .qry run in
the MySQL database from an installation instruction. But (one more
time) what about the automated installation of the MySQL database
without user intervention?

Daniel Crespo



From rkern at ucsd.edu  Wed Apr 20 12:56:58 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 20 Apr 2005 09:56:58 -0700
Subject: Troll? was: Re: goto statement
In-Reply-To: <d460o7$g7j$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>	<d45to7$g02$1@news.tsystems.kiev.ua>	<mailman.2184.1114013215.1799.python-list@python.org>
	<d460o7$g7j$1@news.tsystems.kiev.ua>
Message-ID: <d461cm$4c6$1@sea.gmane.org>

Maxim Kasimov wrote:
> Andr? Roberge wrote:
> 
>> Maxim Kasimov wrote:
>>
>>>
>>> by the way, "goto" statement will be useful for writing more powerful 
>>> obfuscators
>>>
>> Let me get that clear: you want a goto to help with debugging.
>>
>> And you want to obfuscate your code even more?
>>
>> !?
>>
>> Perhaps you need to write in Perl, or some other similar language.
>>
>> Writing in Python is for those that seek clarity (not obfuscation) and 
>> less bugs.   Which is why a goto statement should definitely never be 
>> part of Python!
>>
>> Andr?
>>
> 
> so insulting to me - you asking i'm a troll, only becose i'm saing that 
> goto maybe sometimes usefull.

No, because you said that it was useful for obfuscating code. 
Obfuscating code is generally not a desirable feature of a language 
construct.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From sjmachin at lexicon.net  Mon Apr 18 18:41:06 2005
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 19 Apr 2005 08:41:06 +1000
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
Message-ID: <66d861tapjp3fo8duoh8oceinae6ands95@4ax.com>

On 18 Apr 2005 13:05:57 -0700, "AdSR" <artur_spruce at yahoo.com> wrote:

>Fellow Pythonistas,
>
>Please check out
>
>http://spyced.blogspot.com/2005/04/how-well-do-you-know-python-part-3.html
>
>if you haven't done so yet. It appears that you can specify a function
>explicitly to take n-tuples as arguments. It actually works, checked
>this myself. If you read the reference manual at
>http://docs.python.org/ref/function.html
>really carefully, you will find that it is indeed part of the language
>spec, but it's a likely candidate for the least advertised Python
>feature. Small wonder since it looks like one of those language
>features that make committing atrocities an order of magnitude easier.
>

Thanks for pointing this out. However I see no atrocity potential here
-- what did you have in mind?

See below. Better documentation in the "def" (even better than having
say "year_month_day" instead of my lazy "dt_tup"). No overhead;
byte-code is the same.

>>> def weird_date_from_tuple(dt_tup):
...    year, month, day = dt_tup
...    return
...
>>> import dis
>>> dis.dis(weird_date_from_tuple)
  2           0 LOAD_FAST                0 (dt_tup)
              3 UNPACK_SEQUENCE          3
              6 STORE_FAST               3 (year)
              9 STORE_FAST               1 (month)
             12 STORE_FAST               2 (day)

  3          15 LOAD_CONST               0 (None)
             18 RETURN_VALUE
>>> def weird_date_from_tuple((year, month, day)):
...    return
...
>>> dis.dis(weird_date_from_tuple)
  1           0 LOAD_FAST                0 (.0)
              3 UNPACK_SEQUENCE          3
              6 STORE_FAST               1 (year)
              9 STORE_FAST               2 (month)
             12 STORE_FAST               3 (day)

  2          15 LOAD_CONST               0 (None)
             18 RETURN_VALUE
>>>

Cheers,
John




From miki.tebeka at zoran.com  Mon Apr 25 07:43:45 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Mon, 25 Apr 2005 14:43:45 +0300
Subject: Is there a package with convolution and related methods?
In-Reply-To: <YTO9e.98425$cg1.44378@bgtnsc04-news.ops.worldnet.att.net>
References: <YTO9e.98425$cg1.44378@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <20050425114345.GK3652@zoran.com>

Hello Charles,

> Is there a Python package with Convolution and related methods?
> 
> I'm working on modeling some DSP processes in Python.  I've rolled one
> up, but don't feel much like reinventing the wheel, especially if
> there's already something like "Insanely Efficient FFT for Python"
> already.
Have you looked at NumArray (http://www.stsci.edu/resources/software_hardware/numarray)
and SciPy (http://www.scipy.org/)?

I also think that gmp (http://www.swox.com/gmp/) which has Python binding
(http://gmpy.sourceforge.net/) has FFT.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From kent37 at tds.net  Wed Apr 20 15:10:12 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 20 Apr 2005 15:10:12 -0400
Subject: Array of Chars to String
In-Reply-To: <mailman.2198.1114021232.1799.python-list@python.org>
References: <mailman.2133.1113942800.1799.python-list@python.org>	<42658990.7739398@news.oz.net>	<mailman.2139.1113953291.1799.python-list@python.org>	<d44uiv$it1$04$1@news.t-online.com>
	<mailman.2198.1114021232.1799.python-list@python.org>
Message-ID: <4266a4d1$1_2@newspeer2.tds.net>

Michael Spencer wrote:
> Anyway, here are the revised timings...
>  ...     print shell.timefunc(func_translate1, "Bob Carol Ted Alice" * 
> multiplier, 'adB')

What is shell.timefunc?

Thanks,
Kent


From grante at visi.com  Wed Apr 27 10:25:38 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 27 Apr 2005 14:25:38 -0000
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
	<116tf7lm0ivnl6c@corp.supernews.com>
	<1114600746.599172.163730@o13g2000cwo.googlegroups.com>
Message-ID: <116v872cjudbbd8@corp.supernews.com>

On 2005-04-27, dcrespo <dcrespo at gmail.com> wrote:

> And what did you use for deploying either PyGTK and wxPython? In other
> words, what were your workspace and logic of the development?

To whom is this question addressed?

I suggest you quote properly when replying in order to give
your question the context required to answer it.

-- 
Grant Edwards                   grante             Yow!  Am I elected yet?
                                  at               
                               visi.com            


From steven.bethard at gmail.com  Fri Apr  8 17:15:47 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 08 Apr 2005 15:15:47 -0600
Subject: Counting iterations
In-Reply-To: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
Message-ID: <MuSdncXdwqPgacvfRVn-1g@comcast.com>

Derek Basch wrote:
> Is there a better way to count iterations that this?:
> 
> pets = 0
> for i in pets:
>     pets += 1
>     print "pet" + "#" + pets

for i, pet in enumerate(pets):
     print 'pet#%i' % (i + 1)

STeVe


From roy at panix.com  Fri Apr  1 07:53:18 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 01 Apr 2005 07:53:18 -0500
Subject: Ternary Operator in Python
References: <mailman.1172.1112340286.1799.python-list@python.org>
Message-ID: <roy-64C3AF.07531801042005@reader1.panix.com>

praba kar <prabapython at yahoo.co.in> wrote:

> Dear All,
>     I am new to Python.  I want to know how to
> work with ternary operator in Python.  I cannot
> find any ternary operator in Python.

You answered your own question; there is no ternary operator in Python.  
There was a major debate on this newsgroup a year or so ago on this 
subject, and the decision was quite clear that no such feature would be 
added.

If you google for "python ternary", you will find a huge amount of material 
written on the subject.


From jarrod.roberson at gmail.com  Fri Apr 22 15:22:41 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 22 Apr 2005 12:22:41 -0700
Subject: Python licence again
In-Reply-To: <mailman.2299.1114196095.1799.python-list@python.org>
References: <mailman.2299.1114196095.1799.python-list@python.org>
Message-ID: <1114197761.019100.38890@o13g2000cwo.googlegroups.com>

try spelling license correctly next time and heading the google
suggestions that probably looked like "didn't you mean : Python License"



From invalidemail at aerojockey.com  Fri Apr  1 20:04:05 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 1 Apr 2005 17:04:05 -0800
Subject: Ternary Operator in Python
In-Reply-To: <mailman.1212.1112398120.1799.python-list@python.org>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
	<mailman.1212.1112398120.1799.python-list@python.org>
Message-ID: <1112403845.059741.213410@z14g2000cwz.googlegroups.com>


Terry Reedy wrote:
> "Carl Banks" <invalidemail at aerojockey.com> wrote in message
> news:1112391650.018826.274970 at l41g2000cwc.googlegroups.com...
> >> A unary operator has one operand; a binary operator has two
operands;
> >> ternary operator has three operands.  Python has none built-in,
> >
> > Not so fast, my friend.  What about the expression "0.0 < a < 1.0"?
>
> Gee, what about 0.0 < a < 1.0 < b < 2.0?  I see both as synthesized
> multinary operators, but your are right in that this combination does
act
> differently than a+b+c.

It seems that Python has an infinite number of operators.


-- 
CARL BANKS



From codecraig at gmail.com  Thu Apr 21 13:12:36 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 10:12:36 -0700
Subject: python classes/file structure
In-Reply-To: <1114103206.925440.218520@l41g2000cwc.googlegroups.com>
References: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>
	<mailman.2229.1114097050.1799.python-list@python.org>
	<1114103206.925440.218520@l41g2000cwc.googlegroups.com>
Message-ID: <1114103556.453615.304010@l41g2000cwc.googlegroups.com>

also is it common to have one class per file?

seems weird to have, MyCustomWidget.MyCustomWidget

thanks



From stevenaleach at mac.com  Thu Apr 28 00:00:08 2005
From: stevenaleach at mac.com (steve.leach)
Date: Thu, 28 Apr 2005 00:00:08 -0400
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114564416.221686.54300@l41g2000cwc.googlegroups.com>
Message-ID: <d4pn41$6ak$1@domitilla.aioe.org>

Harlin Seritt wrote:
> Hi monkey,
> 
> Not a stupid question especially if you're trying to create commercial
> software and don't want to reveal your source. At any rate, you can use
> py2exe to create a .exe file. It does have some cons to it since you

Some very severe cons considering that would mean his code would only 
run on a certain infamous legacy operating system that will remain 
unnamed.  The last I checked, ".exe" files were rather useless on most 
operating systems.


From prabapython at yahoo.co.in  Wed Apr  6 09:00:59 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Wed, 6 Apr 2005 14:00:59 +0100 (BST)
Subject: how to parse system functions output
In-Reply-To: 6667
Message-ID: <20050406130059.21786.qmail@web8410.mail.in.yahoo.com>

Dear all,

      I want to parse the system functions output
but I couldn't do it. Kindly assist me in this
task.

eg) bytesused = os.system('du -sh /Users/enmail')
if I print this bytesused variable the output of
bytesused variable is the below

14M     /Users/enmail
0

Now From this Output I want only '14M" I cannot split
this output by space.  If anyone know regarding this
mail me ASAP

regards
Prabahar


________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From mahs at telcopartners.com  Sun Apr  3 14:27:37 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 03 Apr 2005 11:27:37 -0700
Subject: Corectly convert from %PATH%=c:\\X; "c:\\a;   b" TO ['c:\\X',
 'c:\\a; b']
In-Reply-To: <1112520171.853820.90010@o13g2000cwo.googlegroups.com>
References: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>	<mailman.1249.1112491243.1799.python-list@python.org>
	<1112520171.853820.90010@o13g2000cwo.googlegroups.com>
Message-ID: <d2pchs$o95$1@sea.gmane.org>

chirayuk wrote:

> 
> However, I just realized that the following is also a valid PATH in
> windows.

> 
> PATH=c:\A"\B;C"\D;c:\program files\xyz"
> (The quotes do not need to cover the entire path)

Too bad!  What a crazy format!
> 
> So here is my handcrafted solution.
> 
> def WinPathList_to_PyList (pathList):
>     pIter = iter(pathList.split(';'))
>     OddNumOfQuotes = lambda x: x.count('"') % 2 == 1
>     def Accumulate (p):
>         bAcc, acc = OddNumOfQuotes(p), [p]
>         while bAcc:
>             p = pIter.next ()
>             acc.append (p)
>             bAcc = not OddNumOfQuotes (p)
>         return "".join (acc).replace('"','')
>     return [q for q in [Accumulate (p) for p in pIter] if q]
> 
Does it work?

I get:
  >>> test2 = r'c:\A"\B;C"\D;c:\program files\xyz"'
  >>> WinPathList_to_PyList(test2)
  Traceback (most recent call last):
    File "<input>", line 1, in ?
    File "pathsplit", line 31, in WinPathList_to_PyList
    File "pathsplit", line 27, in Accumulate
  StopIteration
  >>>

Also, on the old test case, I get:
  >>> WinPathList_to_PyList("""\"c:\\A;B";c:\\D;""")
  ['c:\\AB', 'c:\\D']
  >>>

Should the ';' within the quotes be removed?

> 
> So now I need to check if the os is windows.
> 
> Wishful thinking: It would be nice if something like this (taking care
> of the cases for other OS's) made it into the standard library - the
> interpreter must already be doing it.
> 
This sort of 'stateful' splitting is a somewhat common task.  If you're feeling 
creative, you could write itertools.splitby(iterable, separator_func)

This would be a sister function to itertools.groupby (and possible derive from 
its implementation).  separator_func is a callable that returns True if the item 
is a separator, False otherwise.

splitby would return an iterator of sub-iterators (like groupby) defined by the 
items between split points

You could then implement parsing of crazy source like your PATH variable by 
implementing a stateful separator_func

Michael



From olaamigoquepasa at hotmail.com  Thu Apr 21 19:52:15 2005
From: olaamigoquepasa at hotmail.com (hawkesed)
Date: 21 Apr 2005 16:52:15 -0700
Subject: Dictionary question.
In-Reply-To: <mailman.2213.1114079526.1799.python-list@python.org>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
	<8c7f10c60504210317a51586@mail.gmail.com>
	<mailman.2213.1114079526.1799.python-list@python.org>
Message-ID: <1114127535.805214.109140@o13g2000cwo.googlegroups.com>

Here is an example of the input list:
[101, 66, 75, 107, 108, 101, 106, 98, 111, 88, 119, 93, 115, 95, 114,
95, 118, 109, 85, 75, 88, 97, 53, 78, 98, 91, 115, 77, 107, 153, 108,
101]

Here is the code I am working on now:
>>> for num in alist:
... 	if adict.has_key(num):
... 		x = adict.get(num)
... 		x = x + 1
                // update the value here
        else
               // add the new value here.
Its these two commented out lines that I am working on. For the record,
I am not in a python class. I am trying to learn python. For one thing
I thought it looks like it would be a good tool to work with math and
statistics stuff. Thanks for the help.
Have a great day.
Ed



From damiansmom at shaw.ca  Mon Apr  4 07:22:27 2005
From: damiansmom at shaw.ca (JustMe)
Date: 4 Apr 2005 04:22:27 -0700
Subject: Text file to SDE
Message-ID: <aaaff51f.0504040322.201cd3d9@posting.google.com>

We have recently purchased ARCSDE 9.  I have attended the ARCSDE
administrator for Oracle course, but it did not cover how to write
data without an the arcgis interfaces.

I was told however that I could write data say from a text file
directly to the sde using python.

Does anyone have a sample script on how to do this, or tell me where I
can find this information.

Thanks in advance
Just me


From thn at mail.utexas.edu  Fri Apr 15 10:37:28 2005
From: thn at mail.utexas.edu (Thomas Nelson)
Date: Fri, 15 Apr 2005 09:37:28 -0500
Subject: new to mac OS10
In-Reply-To: <1113571800.485209.169320@z14g2000cwz.googlegroups.com>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>
Message-ID: <d3ojjf$n11$1@geraldo.cc.utexas.edu>

The main thing I would like is to be able to use tkinter with python on 
my mac.  will the command-line-style source allow this?  Does it come 
with IDLE?  How is the fink version different from the source i can 
download at python.org?  Here's the result of the requested commands on 
my Terminal.  It would appear that these links are broken, as 
Python.framework no longer exists.  Sorry to be so much trouble,

THN



Welcome to Darwin!
~ $ ls -all /usr/bin/python*
lrwxr-xr-x  1 root  wheel    9 20 Jun  2004 /usr/bin/python -> python2.3
lrwxr-xr-x  1 root  wheel   72 20 Jun  2004 /usr/bin/python2.3 -> 
../../System/Library/Frameworks/Python.framework/Versions/2.3/bin/python
lrwxr-xr-x  1 root  wheel   10 20 Jun  2004 /usr/bin/pythonw -> pythonw2.3
-rwxr-xr-x  1 root  wheel  122  8 Jun  2003 /usr/bin/pythonw2.3
~ $ ls /System/Library/Framework/Python.framework
ls: /System/Library/Framework/Python.framework: No such file or directory
~ $ cd /System/Library/Framework/Python.framwork
-bash: cd: /System/Library/Framework/Python.framwork: No such file or 
directory
~ $


Jorl Shefner wrote:
> If you simply want the latest python to run from the command line, then
> compiling the source code works fine on the mac.  I just installed
> 2.4.1 on Os 10.3.8 last week without any problems.
> 
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz
> 
> "./configure"
> "make"
> "make install"
> 
> J.S.
> 


From abkhd at earth.co.jp  Mon Apr 18 10:28:24 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 18 Apr 2005 07:28:24 -0700
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
Message-ID: <1113834504.919986.129180@z14g2000cwz.googlegroups.com>

Bill Davy wrote:
> I downlaoded and installed
> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
>
> I'm trying to build an extension using SWIG 1.3.24 and the linker
needs
> python24_d.lib (I do not have the DLL either).  I've not found it in
any of
> the
> downloads.
>
> So I tried to download the source to build it myself.  Of
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tar.bz2 and
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz, WinZip (9.0
SR1)
> just says "Error reading header after processing 0 entries".
>
> Additionally, I've had no joy downloading the unzipper
> (ftp://sources.redhat.com/pub/bzip2/v102/bzip2-102-x86-win32.exe)
from the
> site cited for the unzipper (http://sources.redhat.com/bzip2/).  It
flashed
> up a
> black console window momentarily.
>
> Oh, this is sooooo frustrating! :-(
>
> Can anyone point me in the right direction?
>
> And then I can get to grips with my work.
>
> tia
>     Bill



I am no expert in MSVC6, but it sounds like maybe you need to supply
the no-debug switch in your extention setup.py file: /d NDEBUG.

In case that does not work and help on this is not forthcoming, you can
always try pyMinGW[1].


Regards,
Khalid



[1] pyMinGW:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From dcrespo at gmail.com  Wed Apr 27 23:41:43 2005
From: dcrespo at gmail.com (dcrespo)
Date: 27 Apr 2005 20:41:43 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <mailman.2612.1114656144.1799.python-list@python.org>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<mailman.2580.1114613011.1799.python-list@python.org>
	<1114616192.342452.178720@o13g2000cwo.googlegroups.com>
	<mailman.2584.1114617214.1799.python-list@python.org>
	<1114626660.172481.303090@z14g2000cwz.googlegroups.com>
	<mailman.2612.1114656144.1799.python-list@python.org>
Message-ID: <1114659703.325422.195730@l41g2000cwc.googlegroups.com>

> Really though, these questions are more suited for the wxPython
mailing list.

Thank you very much for this acclaration :)



From philippe at philippecmartin.com  Fri Apr 15 09:31:02 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Fri, 15 Apr 2005 13:31:02 GMT
Subject: Using python from a browser/security hole
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
	<Q9P7e.65416$Bm2.4488309@phobos.telenet-ops.be>
Message-ID: <qmP7e.2473$VA3.25@newssvr30.news.prodigy.com>

I'll take a lok, thanks

Roel Schroeven wrote:

> Philippe C. Martin wrote:
> 
>> Since I need to access a local/client device from the page and that I
>> wish to be cross-platform; does that mean Java is my only way out ?
> 
> Or you could try Jython (http://www.jython.org/).
> 



From jjl at pobox.com  Fri Apr 29 15:16:57 2005
From: jjl at pobox.com (John J. Lee)
Date: 29 Apr 2005 20:16:57 +0100
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
	<slrnd70bt5.d0e.davecook@localhost.localdomain>
Message-ID: <r7gtpf4m.fsf@pobox.com>

Dave Cook <davecook at nowhere.net> writes:

> On 2005-04-27, monkey <m at m.com> wrote:
[...]
> Pydev has some compelling features, but I wish I didn't have to run eclipse
[...]

What are those compelling features of Pydev, for an emacs user?


John



From Dennis.Benzinger at gmx.net  Fri Apr 15 05:13:06 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Fri, 15 Apr 2005 11:13:06 +0200
Subject: RE Engine error with sub()
In-Reply-To: <d3nhqk$dlo$1@domitilla.aioe.org>
References: <d3nhqk$dlo$1@domitilla.aioe.org>
Message-ID: <425f85a2$1@news.uni-ulm.de>

Maurice LING schrieb:
> Hi,
> 
> I have the following codes:
> 
> from __future__ import nested_scopes
 > [...]

Are you still using Python 2.1?

In every later version you don't need the
"from __future__ import nested_scopes" line.

So, if you are using Python 2.1 I strongly recommend
upgrading to Python 2.4.1.

> [...]
> It all works well for rule count up to 800+ but when my replacement 
> rules swells up to 1800+, it gives me a runtime error that says 
> "Internal error in regular expression engine"... traceable to "return 
> self.regex.sub(self, text)" in substitute() method.
> [...]

I didn't read your code, but this sounds like you have a problem with 
the regular expression engine being recursive in Python versions < 2.4.
Try again using Python 2.4 or later (i.e. Python 2.4.1). The new regular 
expression engine is not recursive anymore.

Bye,
Dennis


From duncan.booth at invalid.invalid  Tue Apr  5 05:28:35 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Apr 2005 09:28:35 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com> <_2R3e.3341$7b.3033@trndny06>
	<uqednS7IkJQ69M3fRVn-qQ@comcast.com> <eOg4e.2512$7b.37@trndny04>
	<fqqdnVdRvpeXM8zfRVn-2g@comcast.com> <Uul4e.2689$7b.1684@trndny04>
	<mailman.1369.1112691118.1799.python-list@python.org>
Message-ID: <Xns962F690225657duncanrcpcouk@127.0.0.1>

Simon Brunning wrote:

> On Apr 5, 2005 2:04 AM, Raymond Hettinger <vze4rx4y at verizon.net> wrote:
>> [Steven Bethard]
>> > So do I read this right in preferring
>> >      [<x> for <y> in <z>]
>> > over
>> >      list(<x> for <y> in <z>)
>> 
>> Yes!
> 
> Why? (Serious question. I'm sure that you have a good reason - I just
> can't figure out what it is.)
> 
> The generator expression has the advantage of not leaking references
> into the enclosing namespace. What's advantage of the list comp?
> 
The list comprehension is about 15-20% faster according to timeit.py:

C:\Python24\Lib>..\python.exe timeit.py -s "t = range(1000)" "[ x for x in t]"
10000 loops, best of 3: 116 usec per loop

C:\Python24\Lib>..\python.exe timeit.py -s "t = range(1000)" "list(x for x in t)"
1000 loops, best of 3: 144 usec per loop

C:\Python24\Lib>..\python.exe timeit.py -s "t = range(100000)" "[ x for x in t]"
10 loops, best of 3: 13.9 msec per loop

C:\Python24\Lib>..\python.exe timeit.py -s "t = range(100000)" "list(x for x in t)"
10 loops, best of 3: 16.3 msec per loop

Alternatively you could just regard the list comprehension as having 
less clutter on the screen so it may be clearer.


From bokr at oz.net  Sun Apr 17 05:26:02 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 09:26:02 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
Message-ID: <4262261c.159801732@news.oz.net>

On Sun, 17 Apr 2005 01:00:46 -0700, Dick Moores <rdm at rcblue.com> wrote:

>M.E.Farmer wrote at 23:18 4/14/2005:
>> > >Using the GNU "bc" utility:
>> > >
>> > >   $ bc -l
>> > >   bc 1.06
>> > >   Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation,
>>Inc.
>> > >   This is free software with ABSOLUTELY NO WARRANTY.
>> > >   For details type `warranty'.
>> > >   scale = 3000    # number of output places wanted
>> > >   obase = 12      # output base
>> > >   print 4 * a(1)  # pi = 4*arctan(1)
>
>Wow! this got me the 3003 (changed from 3000) digits of pi to base 12 in 
>60.8 secs. No, I didn't count them yet, nor am I sure they're correct. 
>But I'd bet on them..
>
>Could someone remind me how to get the output of bc -l into a text file 
>on Windows? (I've tried employing " > pi3003.txt" in various ways) OR, 
>how to copy and paste from the command line window, or whatever that 
>window is called? (Sorry for the OT question.)
To copy from the command window to the clipboard:

1. Scroll top of desired stuff to make it visible near top
2. Hold down Alt
3. Tap Space Bar
4. Release Alt
5. Tap e
6. Tap k
7. Use mouse or arrow keys to place cursor on top left corner of desired box
8. Hold down Shift
9. Use arrow keys or mouse-with-left-button-pressed to go to bottom right character of desired box
9a. If the bottom is out of sight, keep holding  shift down and pretend you can cursor down below bottom.
    the attempt should make the screen scroll up and select more desired material. If you overshoot, don't panic,
    just keep holding down shift and use arrows (the are slower) or mouse-with-left-button-still-down to move to
    desired bottom right corner.
10. Release mouse button if using that
11. Release Shift
12. Press Enter
That should copy to the clipboard and make the selection box revert to normal display.

Pasting from clipboard is up to you. Pasting into the command window from clipboard
is 2-5 above, and Tap p

HTH

PS. Redirecting with > from a script whose interpreter was started by windows extension association
doesn't work on some version of windows. To be safe, invoke the interpreter explicitly, e.g.,
    python myscript.py [whatever args here] > pi3003.txt

If myscript.py is not in the current directory, use a sufficient path to it. If your windows is having
that problem, the same will happen with a perl script or other script when you run it as just myscript.ext ...
and depend on windows to start the right interpreter.

Regards,
Bengt Richter


From mark.greenbank at gmail.com  Sun Apr 10 12:02:13 2005
From: mark.greenbank at gmail.com (mark.greenbank at gmail.com)
Date: 10 Apr 2005 09:02:13 -0700
Subject: email and smtplib modules
In-Reply-To: <86d5t3wrtf.fsf@guru.mired.org>
References: <1113081060.969295.36900@o13g2000cwo.googlegroups.com>
	<86d5t3wrtf.fsf@guru.mired.org>
Message-ID: <1113148933.012000.139710@f14g2000cwb.googlegroups.com>

Hi Mike,

Thanks for the quick tutorial :) Quite helpful.



From scmarsh at hotmail.com  Thu Apr 21 16:46:25 2005
From: scmarsh at hotmail.com (scott)
Date: Thu, 21 Apr 2005 20:46:25 GMT
Subject: Jython run scripts problem  (2.2.0a0 on Mac OSX 10.3.8)
Message-ID: <BiU9e.1094373$Xk.33717@pd7tw3no>

I installed darwinports and did a "sudo port install jython"

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

scott$ which jython
/opt/local/bin/jython

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

Jython works in interactive mode as shown below:

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

pyprogs$ cd hotbits/
hotbits$ ls
flips50.py      jythoninstall.py randomX          randomflip.py
hotbits$ jython
Jython 2.2a0 on java1.4.2_05 (JIT: null)
 >>> # Truly random (radioactive decay triggered) coin flip
 >>> from randomX import randomHotBits
 >>> r = randomHotBits()
 >>> if r.nextByte() < 0:
...     print 'tails'
... else:
...     print 'heads'
...
tails

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

Jython *doesn't* work if I save the above as a script and try to run it. 
It refuses to run the script and simply starts up in interactive mode:

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

hotbits$ jython randomflip.py
Jython 2.2a0 on java1.4.2_05 (JIT: null)
 >>>

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

Question:
How can I run scripts as expected (outside interactive mode)?

Thanks in advance.


From bokr at oz.net  Fri Apr 22 21:42:35 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 23 Apr 2005 01:42:35 GMT
Subject: a=[ lambda t: t**n for n in range(4) ]
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>
Message-ID: <4269a0ea.275861307@news.oz.net>

On 22 Apr 2005 15:18:53 -0700, mehmetmutigozel at gmail.com wrote:

>Thanx for your replies.
>
>I'm looking for array of functions.
>Something like a=[ sin(x) , cos(x) ]
>
>>>> x=0.0
>>>> a
>[0, 1]
>>>> x=1.0
>>>> a
>...
>
>of course it can be made by
>>>> def cratearray(x):
>...           ~~~~
>...           return a
>a=createarray(1.0)
>
>but this isn't what i am asking for. something automized.
>
I still don't know what you are asking for, but here is a toy,
whose code you will be able to improve on later, but at least
provides concrete behavior that you can comment on, and maybe
explain what you are really asking for.

 >>> class FunArray(object):
 ...     def __init__(self, *funs):
 ...         self.__dict__['_funs'] = funs
 ...         self.__dict__['_names'] = []
 ...         vars
 ...     def __getattribute__(self, attr):
 ...         if attr.startswith('_') or hasattr(type(self), attr):
 ...             return object.__getattribute__(self, attr)
 ...         v = vars(self).get(attr)
 ...         if v is None: return ['%r is not set'%attr]
 ...         return [f(v) for f in self._funs]
 ...     def __setattr__(self, attr, v):
 ...         if attr.startswith('_'): raise AttributeError, attr
 ...         else:
 ...             if attr in self._names: self._names.remove(attr)
 ...             self._names.append(attr)
 ...             self.__dict__[attr] = v
 ...     def __repr__(self):
 ...         last = self._names and self._names[-1] or '??'
 ...         d= vars(self)
 ...         return '<FunArray names: %s\n  %r => %s>'% (
 ...                     ', '.join(['%s=%r'%(k, d[k]) for k in self._names]),
 ...                     last, repr(getattr(self, last)))
 ...
 >>> from math import sin, cos, pi
 >>> a = FunArray(sin, cos)
 >>> a.x = 0.0
 >>> a
 <FunArray names: x=0.0
   'x' => [0.0, 1.0]>
 >>> a.x
 [0.0, 1.0]
 >>> a.y = 1.0
 >>> a.y
 [0.8414709848078965, 0.54030230586813977]
 >>> a
 <FunArray names: x=0.0, y=1.0
   'y' => [0.8414709848078965, 0.54030230586813977]>
 >>> a.z = pi/3
 >>> a
 <FunArray names: x=0.0, y=1.0, z=1.0471975511965976
   'z' => [0.8660254037844386, 0.50000000000000011]>
 >>> a.x = pi/6
 >>> a
 <FunArray names: y=1.0, z=1.0471975511965976, x=0.52359877559829882
   'x' => [0.49999999999999994, 0.86602540378443871]


If you just want an interactive calculator that acts according to your taste,
you can program one to prompt and read (use raw_input, not input BTW) what you
type in and calculate and print whatever form of result you'd like. See the cmd
module for one way not to reinvent some wheels.

But why not spend some time with the tutorials, so have a few more cards in your deck
before you try to play for real? ;-)

Regards,
Bengt Richter


From cdkrug at worldnet.att.net  Fri Apr 29 23:56:19 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Sat, 30 Apr 2005 03:56:19 GMT
Subject: Data smoothing algorithms?
References: <000c01c54c38$313eb580$0201a8c0@mcuf7>
	<mailman.37.1114800769.14961.python-list@python.org>
Message-ID: <DlDce.164264$cg1.64813@bgtnsc04-news.ops.worldnet.att.net>

"Anthra Norell" <anthra.norell at tiscalinet.ch> writes:
> 
>> Hi,
>> 
> The following are differences of solar declinations from one day to
> the next, (never mind the unit). Considering the inertia of a
> planet, any progress of (apparent) celestial motion over regular
> time intervals has to be highly regular too, meaning that a plot
> cannot be jagged. The data I googled out of Her Majesty's Nautical
> Almanac are merely nautical precision and that, I suppose, is where
> the jitter comes in. There's got to be algorithms out there to iron
> it out. If it were a straight line, I could do it. But this, over
> the whole year, is a wavy curve, somthing with a dominant sine
> component. Suggestions welcome.
> 

Anything you do to your samples is going to distort the samples, either
in frequency or in time.

Luckily for you, all of the interesting information in your signal is in
the time domain representation, unless you consider a
3.1709791983764586504312531709792e-8Hz sinusoid interesting.

A simple moving average filter is often helpful in these cases, along
with being the Simplest Possible Thing That Might Work.

Take a look at: http://www.dspguide.com/pdfbook.htm
"The Scientist and Engineer's Guide to DSP," which is well regarded by
the denizens of comp.dsp.

Check out Chapter 14 for an overview, and 15 for moving average filters.

You can also try a single-pole recursive filter with a cutoff of 1/360
of your sample rate, but that slightly more complicated.

Try the moving average first.  It's the simplest and very often Good
Enough.




From tundra at tundraware.com  Thu Apr 21 04:37:31 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 21 Apr 2005 04:37:31 EDT
Subject: python LEX
In-Reply-To: <gs4kj2-uim.ln1@eskimo.tundraware.com>
References: <d47mli$d1v$1@bagan.srce.hr> <gs4kj2-uim.ln1@eskimo.tundraware.com>
Message-ID: <td5kj2-vjm.ln1@eskimo.tundraware.com>

Tim Daneliuk wrote:

> jozo wrote:
> 
>> I have to work on python lexical definition in Lex. I spent lots of my
>> time to find regular expresions written for Lex of Python language but
>> nothing.
>> Can somebody help me?
>>
>> I nEED hELP
>>
> http://systems.cs.uchicago.edu/ply/
> 

Whoops - I did not read your question carefully enough ... sorry, cannot
help with what you actually asked.

<Slinks off ...>

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From Ugo_DiGirolamo at invision.iip.com  Fri Apr 29 12:34:09 2005
From: Ugo_DiGirolamo at invision.iip.com (Ugo Di Girolamo)
Date: Fri, 29 Apr 2005 09:34:09 -0700
Subject: Problem with embedded python - bug?
Message-ID: <3D4A0A4A0225484B965A23CFD127B82F4A6811@invnmail.invision.iip.com>

I have been having a few more discussions around about this, and I'm starting to think that this is a bug.

My take is that, when I call Py_Finalize, the python thread should be shut down  gracefully, closing the file and everything. 
Maybe I'm missing a call to something (?PyEval_FinalizeThreads?) but the docs seem to say that just PyFinalize should be called.

The open file seems to be the issue, since if I remove all the references to the file I cannot get the program to crash.

I can reproduce the same behavior on two different wxp systems, under python 2.4 and 2.4.1.

Ugo


-----Original Message-----
From: Ugo Di Girolamo 
Sent: Tuesday, April 26, 2005 2:16 PM
To: 'python-dev at python.org'
Subject: Problem with embedded python

I have the following code, that seems to make sense to me. 


However, it crashes about 1/3 of the times. 


My platform is Python 2.4.1 on WXP (I tried the release version from 
the msi and the debug version built by me, both downloaded today to 
have the latest version). 


The crash happens while the main thread is in Py_Finalize. 
I traced the crash to _Py_ForgetReference(op) in object.c at line 1847, 
where I have op->_ob_prev == NULL.


What am I doing wrong? I'm definitely not too sure about the way I'm 
handling the GIL. 


Thanks in adv for any suggestion/ comment


Cheers and ciao 


Ugo 

////////////////////////// TestPyThreads.py ////////////////////////// 
#include <windows.h> 
#include "Python.h" 


int main() 
{ 
        PyEval_InitThreads(); 
        Py_Initialize(); 
        PyGILState_STATE main_restore_state = PyGILState_UNLOCKED; 
        PyGILState_Release(main_restore_state); 


        // start the thread 
        { 
                PyGILState_STATE state = PyGILState_Ensure(); 
                int trash = PyRun_SimpleString( 
                                "import thread\n" 
                                "import time\n" 
                                "def foo():\n" 
                                "  f = open('pippo.out', 'w', 0)\n" 
                                "  i = 0;\n" 
                                "  while 1:\n" 
                                "    f.write('%d\\n'%i)\n" 
                                "    time.sleep(0.01)\n" 
                                "    i += 1\n" 
                                "t = thread.start_new_thread(foo, ())\n" 
                                ); 
                PyGILState_Release(state); 
        } 


        // wait 300 ms 
        Sleep(300); 


        PyGILState_Ensure(); 
        Py_Finalize(); 
        return 0; 

} 


From manatlan at localhost.localdomain  Mon Apr 25 16:55:23 2005
From: manatlan at localhost.localdomain (manatlan)
Date: Mon, 25 Apr 2005 22:55:23 +0200
Subject: pygtk, gtk.treeview and virtuallist ?
Message-ID: <pan.2005.04.25.20.55.23.317317@localhost.localdomain>

Hello, I'm new to pygtk (but i know wxpython very well)

I'm trying to play with this example :
http://www.pygtk.org/pygtk2tutorial/sec-CellRenderers.html#filelistingfig
(the code is here
: http://www.pygtk.org/pygtk2tutorial/examples/filelisting.py)

I'd like to be able to use a virtual list (like wx.ListCtrl in mode
LC_VIRTUAL) ...

This example use a gtk.treeview with a listStore ...
There are callbacks to display "image, texts and info" (via
set_cell_data_func() )
But if there are 1000000 of items, the callbacks will be called 1000000
times before the window appears ;-(

I'd like that theses callbacks are called only when items are displayed in
the window (on demand) ...

is it possible to do that in pygtk ?


From jae at elkins.org  Sun Apr 24 06:41:19 2005
From: jae at elkins.org (jeff elkins)
Date: Sun, 24 Apr 2005 10:41:19 +0000
Subject: GUI woes
In-Reply-To: <bcfrj2-ua9.ln1@home.rogerbinns.com>
References: <mailman.2361.1114307134.1799.python-list@python.org>
	<bcfrj2-ua9.ln1@home.rogerbinns.com>
Message-ID: <200504241041.19200.jae@elkins.org>

On Sunday 24 April 2005 03:11 am, Roger Binns wrote:
> "jeff elkins" <jeffelkins at earthlink.net> wrote in message
> news:mailman.2361.1114307134.1799.python-list at python.org...
>
> > under debian sid, I installed (via apt-get) the various wxpython stuff
> > available.:
> >
> > libwxgtk2.4-python
> > libwxgtk2.5.3-python
> > python-opengl
> > python-pythoncard
> > python2.1-opengl
> > python2.2-opengl
> > python2.3-opengl
> > python2.3-pythoncard
> > pythoncard
> > pythoncard-doc
> > pythoncard-tools
> > wx2.5-examples
> > wxpython2.5.3
> > wxwin2.4-examples
>
> You have a mixture of different versions of wxPython in there.
>
> > AttributeError: MyFrame instance has no attribute 'Bind'
>
> Bind was introduced in wxPython 2.5.  Looks like you are
> running against thr 2.4 library.
>
> Roger

Thanks. I'll see if I can delete/reinstall and fix things.




From bokr at oz.net  Sun Apr  3 03:53:07 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 03 Apr 2005 07:53:07 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
Message-ID: <424f982c.175671582@news.oz.net>

On Sun, 03 Apr 2005 05:09:07 GMT, Ron_Adam <radam2 at tampabay.rr.com> wrote:

>On 2 Apr 2005 20:02:47 -0800, "El Pitonero" <pitonero at gmail.com>
>wrote:
>
>>Ron_Adam wrote:
>>>
>>> So I didn't know I could do this:
>>>
>>> def foo(a1):
>>>     def fee(a2):
>>>         return a1+a2
>>>     return fee
>>>
>>> fum = foo(2)(6)   <------ !!!
>>
>>Ah, so you did not know functions are objects just like numbers,
>>strings or dictionaries. I think you may have been influenced by other
>>languages where there is a concept of static declaration of functions.
>
>No, I did not know that you could pass multiple sets of arguments to
That phraseology doesn't sound to me like your concept space is quite isomorphic
with reality yet, sorry ;-) It sounds like you are thinking of "multiple sets of arguments"
as an aggregate that is passed as such, and that isn't happening, as I believe El Pitonero
is trying to indicate with his parenthesized visualization below.

What is happening is that an expression "foo(2)(6)" is being evaluated left to right.
First foo as a name evaluates to whatever it is bound to, which is the foo function.
Then () is the calling operator, which says evaluate the list inside the parens left to right
and call the thing you had so far, which was foo here. The arg list was just 2, so foo is called
with 2, and foo returns something, with which we will do the next operation if there is one.

If the next operation was "." (i.e., attribute getting) the next thing following would have had
to be an attribute name, e.g. like func_name. foo(2).func_name would evaluate to the same as fee.func_name
for the fee returned by foo(2). But we are not doing .func_name, we are doing (6) as the next operation
in the left-to-right evaluation of the expression. And whatever we have at the foo(2) stage, the (6) means
we should take it and call it with 6 as an argument.

So if you are seeing (2)(6) as something to pass, as opposed to a sequence of operations, I think there's
a misconception involved. Perhaps I am taking your words askew ;-)

>nested defined functions in that manner.  Just haven't ran acrossed it
>in the two years I've been playing around with python. I haven't had a
>reason to try it either.  But maybe now that I'm aware of it, I'll
>find more uses for it.
>
>
>
>>The last line can be better visualized as:
>>
>>fum = (foo(2)) (6)
>>
>>where foo(2) is a callable.
>>
That's clear to me, anyway ;-)

The code shows it too:

 >>> import dis, compiler
 >>> dis.dis(compiler.compile('foo(2)','','eval'))
   1           0 LOAD_NAME                0 (foo)
               3 LOAD_CONST               1 (2)
               6 CALL_FUNCTION            1
               9 RETURN_VALUE

The (6) just calls whatever the result of the preceding was

 >>> dis.dis(compiler.compile('foo(2)(6)','','eval'))
   1           0 LOAD_NAME                0 (foo)
               3 LOAD_CONST               1 (2)
               6 CALL_FUNCTION            1
               9 LOAD_CONST               2 (6)
              12 CALL_FUNCTION            1
              15 RETURN_VALUE

HTH

Regards,
Bengt Richter


From mefjr75 at hotmail.com  Sun Apr 17 15:47:15 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 17 Apr 2005 12:47:15 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
	<1113713669.255207.39580@f14g2000cwb.googlegroups.com>
	<1113726606.945042.71820@z14g2000cwz.googlegroups.com>
	<1113730429.336626.81360@g14g2000cwa.googlegroups.com>
	<1113732226.165477.295890@o13g2000cwo.googlegroups.com>
Message-ID: <1113767235.173452.224680@z14g2000cwz.googlegroups.com>

I found the bug and hope I have squashed it.
Single and qouble quoted strings that were assignments and spanned
multilines using \ , were chopped after the first line.
example:
__date__ =  'Apr 16, 2005,' \
            'Jan 15 2005,' \
            'Oct 24 2004'
became:
__date__ =  'Apr 16, 2005,' \

Not good :(

tokenizer sends this as:
name
operator
string
string
string
newline

I added test for string assignments that end in \.
A flag is set and then all strings till a newline are ignored.
Also rearranged the script a little.
Maybe that will do it ...
Updates available at
> The script is located at:
>  http://bellsouthpwp.net/m/e/mefjr75/python/stripper.py
> 
> M.E.Farmer



From axel at straschil.com  Fri Apr  8 13:07:01 2005
From: axel at straschil.com (Axel Straschil)
Date: 08 Apr 2005 17:07:01 GMT
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu> <slrnd5dbs1.f3b.axel@m2.sine>
	<d36bpj$s59$1@vegh.ks.cc.utah.edu>
Message-ID: <slrnd5dehk.fhj.axel@m2.sine>

Hello!

> thousands more entries. So we're talking about maybe a million+ total
> nested key:values. I don't know if that counts as large or not. I can't
> even guess how much k memory that is.

Mhh, maybe you should use a SQL-Database ;-)

Lg,
AXEL.
-- 
"Aber naja, ich bin eher der Forentyp." Wolfibolfi's outing in 
http://www.informatik-forum.at/showpost.php?p=206342&postcount=10


From peter at engcorp.com  Wed Apr 13 14:57:44 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 13 Apr 2005 14:57:44 -0400
Subject: printing with wxPython
In-Reply-To: <dV87e.43434$IN.789762@twister2.libero.it>
References: <h8Q6e.60538$zZ1.1719996@twister1.libero.it>
	<FKydnWvMkrSIasbfRVn-3g@powergate.ca>
	<dV87e.43434$IN.789762@twister2.libero.it>
Message-ID: <6MKdnTTF5KM29sDfRVn-hQ@powergate.ca>

Fabio Pliger wrote:
> Yeah,
> There are two about printing... there is also an example in the wxDemo...
> but they all talk about printing text... In my case i need to print (or at
> least to make a print preview) a bitmap (or a panel...)

The technique used should be the same.  Basically
you need to be doing draws directly to a Device Context
(or whatever DC stands for...temporary memory lapse)
and then you can draw to the screen or to a printer,
as required.

I don't know offhand what routine is used to draw
a Bitmap into a DC, but I'm sure it's reasonably
well documented under the various DC methods.

-Peter


From steve at holdenweb.com  Mon Apr  4 15:56:13 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 04 Apr 2005 15:56:13 -0400
Subject: How to reload local namespace definitions in the python
	interpreter?
In-Reply-To: <797fe3d4050404122377c77588@mail.gmail.com>
References: <1112435996.697236.231800@l41g2000cwc.googlegroups.com>	
	<3b7an1F6gf5b4U1@individual.net> <d2rl92$i62$1@sea.gmane.org>
	<797fe3d4050404122377c77588@mail.gmail.com>
Message-ID: <42519BDD.3020107@holdenweb.com>

Bill Mill wrote:
> On Apr 4, 2005 11:10 AM, Steve Holden <steve at holdenweb.com> wrote:
> 
>>Tim Jarman wrote:
>>
>>>test1dellboy3 at yahoo.co.uk wrote:
>>>
>>>
>>>
>>>>Hi,
>>>>
>>>>I am a beginner using the python interpreter. To reduce typing effort,
>>>>I created a module called "aliases.py" containing some aliases for
>>>>objects I commonly use like -
>>>>
>>>>aliases.py :
>>>>
>>>>
>>>>import filecmp, os, commands
>>>>
>>>>op = os.path
> 
> <snip>
> 
>>>By the way, are you aware of the import ... as ... idiom?
>>>e.g. import os.path as op
>>>
>>
>>This would, of course, require the user to qualify the names by
>>prefixing them with "op.".
>>
> 
> 
> What the OP listed above requires that too.
> 
I believe the OP was suggesting

   from aliases import *

which specifically loads the names in the module (or those specified in 
module.__all__) into the importing namespace for use without qualification.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/


From edcjones at comcast.net  Wed Apr 27 01:35:39 2005
From: edcjones at comcast.net (Edward C. Jones)
Date: Wed, 27 Apr 2005 01:35:39 -0400
Subject: Lexicographical sort for numarray
Message-ID: <uOSdnUooRt4OufLfRVn-sg@comcast.com>

Suppose arr is a two dimensional numarray array. Suppose we do the 
following:

def rowsort(arr):
     a = arr.tolist()
     a.sort()
     return numarray.array(a)

Can this sort be done efficiently in numarray? This function is called 
"rowsort" in MatLab.


From gsmith at Oxfam.org.uk  Fri Apr 15 10:01:49 2005
From: gsmith at Oxfam.org.uk (gsmith at Oxfam.org.uk)
Date: Fri, 15 Apr 2005 15:01:49 +0100
Subject: MS SQL Server/ODBC package for Python
Message-ID: <OF2DB2D57C.B65B8A59-ON80256FE4.004C9A9A-80256FE4.004C305B@oxfam.org.uk>


I do have a standard install of Python as well as Plone.  Can you have two?
I have run the mxInstaller for both instances .... however, whether I run
the ide from my standard install or my plone install the pythonpath is the
same (ie c:\...\plone 2\python).  My machine registry now has the python
entries all pointing at plone.

Sorry to trouble you like this but do you know how I can get myself out of
this mess?

Cheers.

graham






                                                                                                                                       
                      Simon Brunning                                                                                                   
                      <simon.brunning at g        To:       Graham <gsmith at oxfam.org.uk>                                                  
                      mail.com>                cc:       python-list at python.org                                                        
                                               Subject:  Re: MS SQL Server/ODBC package for Python                                     
                      15/04/2005 14:21                                                                                                 
                      Please respond to                                                                                                
                      simon                                                                                                            
                       :3 Kb                                                                                                           
                                                                                                                                       
                                                                                                                                       




On 4/15/05, Graham <gsmith at oxfam.org.uk> wrote:
> Thanks Simon
> I have just installed mxODBC and tried one of their samples.
> Am getting an error on trying to import mx.ODBC
>
>     ImportError: No module named mx.ODBC
>
> After the install the mx folder has been place in my C:\Program
Files\Plone
> 2\Python\lib\site-packages folder however when I browse the PythonPath
and
> look under Standard Python Library I can't see mx.

Hmmm. Have you got more than one instance of Python installed? Do you
have a 'standard' installation in addition to Plone's? If so, perhaps
mxODBC has been installed for the wrong one.

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/










From mwm at mired.org  Fri Apr 22 02:53:29 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 01:53:29 -0500
Subject: regarding system function
References: <mailman.2268.1114151801.1799.python-list@python.org>
Message-ID: <86sm1js3o6.fsf@guru.mired.org>

praba kar <prabapython at yahoo.co.in> writes:

> Dear All,
>
>      In Php If I send a command to system function
> then It will return 1 on success and 0 on failure.  So
> based upon that value I can to further work.
>
>      But In Python If I send a command to system
> function then It will return 0 only for both
> conditions(success and failure).  So What I need
> to do for this.  I want the result like php system
> function.

You don't say what platform you're on, but from your description of
the problem, it's not Unix:

py> os.system("grep foo /dev/null")
256
py> os.system("grep foo /no_such_file")
grep: /no_such_file: No such file or directory
512

os.system is a simple wrapper around the C system() function. It's
return value is the same as that function. On unix, that's the 1/0 you
want in the upper byte, and status information in the lower byte - so
you divide by 256. I have no idea what Windows does in this case.

I'd recommend using the subprocess routines instead of os.system. They
are much more powerful/flexible than os.system.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From mensanator at aol.com  Thu Apr 14 12:22:07 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 14 Apr 2005 09:22:07 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <slrnd5t1ii.rds.nick@irishsea.home.craig-wood.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<1113430615.592715.78440@f14g2000cwb.googlegroups.com>
	<slrnd5t1ii.rds.nick@irishsea.home.craig-wood.com>
Message-ID: <1113495726.884203.326670@f14g2000cwb.googlegroups.com>


Nick Craig-Wood wrote:
> mensanator at aol.com <mensanator at aol.com> wrote:
> >  I'm using GMPY (see code).
> [snip]
>
> If you are using gmpy you might as well do it like this.....
>
> gmpy.pi() uses the Brent-Salamin Arithmetic-Geometric Mean formula
for
> pi IIRC.  This converges quadratically, and it will calculate you a
> million places without breaking a sweat.

It would be nice if that were documented. What do I have to do, go get
the documentation for the original GMP to find out what else is in GMPY
that they didn't include in the doc file?


>
> >>> import gmpy
> >>> from math import log
> >>> bits = int(3003*log(12)/log(2))
> >>> pi=gmpy.pi(bits+100)
> >>> gmpy.fdigits(pi, 12, 3003)
>
'3.184809493b918664573a6211bb151551a05729290a7809a492742140a60a55256a0661a03753a3aa54805646880181a3683083272bbba0a370b12265529a828903b4b256b8403759a71626b8a54687621849b849a8225616b442796a31737b229b2391489853943b8763725616447236b027a421aa17a38b52a18a838b01514a51144a23315a3009a8906b61b8b48a62253a88a50a43ba0944572315933664476b3aabb77583975120683526b75b462060bb03b432551913772729a2147553531793848a0402b999b5058535374465a68806716644039539a8431935198527b9399b112990abb0383b107645424577a51601b3624a88b7a676a3992912121a213887b92873946a61332242217aa7354115357744939112602ba4b888818a3269222b528487747839994ab223b65b8762695422822669ba00a586097842a51750362073b5a768363b21bb1a97a4a194447749399804922175a068a46739461990a2065bb0a30bbab7024a585b1a84428195489784a07a331a7b0a1574565b373b05b03a5a80a13ab87857734679985558a5373178a7b28271992a3894a5776085083b9b238b2220542462888641a2bab8b3083ab49659172a312b78518654494a068662586a181835a64440b2970a122813975898815367208905801032881449223841428763329617531239b9a657405584014534390b587625606bb80923795944b43757a431b039556282978a6a49590553490ba1844947175637a908247b50127722464441380a852b0847b5813019bb70a67663b426565434069884476132193344ba55a2128a03838974606b851b2979321a408067225a5aa4b3464a1a17473595333909ab9127079655b3164b68b9b28a9b818a220a025ab0934203995b7a62a7aa739355340539ba3182905b193905603a43b660b9426a92294697144a896a5b2339358bb2b7294bb89635b071a6351211360b820b1882ab8433b54757b87a373284b1ba182a10326476b369a4a6365b58b8018994bb152556765475a704bb94b6b2a39458971a8b90512786b5029404818644323552916170b3abb7363496427b088b68725a68570040617949289077b278069a09b559324b8a66828b40549b0296065b2300330592569a7b76b92ba1293585b6a9b604567a0901362856373b4b56897946256b4172b1b50474351364749a33996a81ba8847347a8411b850b79a03018291672aa0945656a159aa6aa0a845531a592005b8a34366b882257107b190969a846474836a9800750778920ba797297a2791101b0685a86bb704b9baa17b055293679843b35215b0a8b1182b611953b080aa5431b219907a8448a81b1a9493245676b88013b470335240859594158621014216619553246570601967448b470174b9244892444817453865a4003b5aa7176451aab90681a949786154aa040477382ba69371041710b8728458a23979252b254236753a44a1900aa283536a227648812525743868b410a567794663359a6726a5286783328135114789b7645505b047848020a730a9557b206776aa56a19682744107901306b29008808619866b4911a05264b872a46b5376383932699531b449195640b62a63622830886247a47b3957169861239358041aa281333622aa15912b0a636047a489bb0726282a78b96671b27305a9652496b9b999011a7ba36898891665b1a6009058978850a21b01a158a1473b84a192b8672542a2a7056581995207a436a5b3ba2824637a3112abb57176468206a071200a327b3216425148100786502aa21236abb35499277670a1269730583403b1922a483856007301983989159bb688a58b602339806b63002a339a50b0ba533b84827793913081070a32595a101803a9a20234691b1a0b623274b69b0b44688195169461059543a252bb05208720ba13118266a872b26b9b584959b45179519534b221a335a2bb6971b3276b3a63a5b791723109b176529bb90651584279b7825712521b8269800738b07a62b14547884414451224092937165625696557a78799a82126613535a36b410309b759976119777b895801074b9779b9b5137538b2799951012273399bb818b722 at 0'
>
> --
> Nick Craig-Wood <nick at craig-wood.com> --
http://www.craig-wood.com/nick



From jdhunter at ace.bsd.uchicago.edu  Fri Apr 15 01:10:48 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Fri, 15 Apr 2005 00:10:48 -0500
Subject: ANN: matplotlib-0.80
Message-ID: <m31x9cwron.fsf@peds-pc311.bsd.uchicago.edu>


matplotlib is a 2D graphics package that produces plots from python
scripts, the python shell, or embeds them in your favorite python GUI
-- wx, gtk, tk, fltk and qt.  Unlike many python plotting alternatives
it is written in python, so it is easy to extend.  matplotlib is used
in the finance industry, web application servers, and many scientific
and engineering disciplines.  With a large community of users and
developers, matplotlib is approaching the goal of having a full
featured, high quality, 2D plotting library for python.

A lot of development has gone into matplotlib since the last major
release, which I'll summarize here.  For details, see the incremental
release notes at http://matplotlib.sf.net/whats_new.html.

Improvements since 0.70

 -- contouring: 

    Lots of new contour functionality with line and polygon contours
    provided by contour and contourf.  Automatic inline contour
    labeling with clabel. See
    http://matplotlib.sourceforge.net/screenshots.html#pcolor_demo

 -- QT backend
    Sigve Tjoraand, Ted Drain and colleagues at the JPL collaborated
    on a QTAgg backend

 -- Unicode strings are rendered in the agg and postscript backends.
    Currently, all the symbols in the unicode string have to be in the
    active font file.  In later releases we'll try and support symbols
    from multiple ttf files in one string.  See
    examples/unicode_demo.py

 -- map and projections

    A new release of the basemap toolkit -  See
    http://matplotlib.sourceforge.net/screenshots.html#plotmap

 -- Auto-legends

    The automatic placement of legends is now supported with
    loc='best'; see examples/legend_auto.py.  We did this at the
    matplotlib sprint at pycon -- Thanks John Gill and Phil! Note that
    your legend will move if you interact with your data and you force
    data under the legend line.  If this is not what you want, use a
    designated location code.

 -- Quiver (direction fields)

    Ludovic Aubry contributed a patch for the matlab compatible quiver
    method.  This makes a direction field with arrows.  See
    examples/quiver_demo.py

 -- Performance optimizations

    Substantial optimizations in line marker drawing in agg

 -- Robust log plots

    Lots of work making log plots "just work".  You can toggle log y
    Axes with the 'l' keypress -- nonpositive data are simply ignored
    and no longer raise exceptions.  log plots should be a lot faster
    and more robust

 -- Many more plotting functions, bugfixes, and features, detailed in
    the 0.71, 0.72, 0.73 and 0.74 point release notes at
    http://matplotlib.sourceforge.net/whats_new.html


Downloads at http://matplotlib.sourceforge.net

JDH


From newsuser at stacom-software.de  Mon Apr 25 03:12:57 2005
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Mon, 25 Apr 2005 09:12:57 +0200
Subject: Nice documentation Python / SWIG / C++
Message-ID: <d4i59q$qqm$02$1@news.t-online.com>

Hi alltogether,

I found a nice and useful article for extenting python with C++ using 
SWIG. It describe from the scratch especially for Windows. Maybe this 
can be included somewhere on www.python.org. Here is the link:

http://www.geocities.com/foetsch/python/extending_python.htm

Alexander

	


From radam2 at tampabay.rr.com  Tue Apr  5 17:32:12 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 21:32:12 GMT
Subject: Decorator Maker is working. What do you think?
References: <sql3515i90b9v5mojnkaet31ftr57hr99j@4ax.com>
	<1112686545.380929.142740@g14g2000cwa.googlegroups.com>
Message-ID: <17r551p9jp665caaf2m6b4egs41levq5bh@4ax.com>

On 5 Apr 2005 00:35:45 -0700, "Kay Schluehr" <kay.schluehr at gmx.net>
wrote:

>Ron_Adam wrote:
>> Ok... it's works! :)
>>
>> So what do you think?
>
>Not much. As long as You do not present any nontrivial examples like
>Guidos MultiMethod decorator or an implementation of the dispatching
>"case" decorator I proposed that would benefit from factoring into pre-
>and postprocessing the pattern has only limited use and worse it
>suggests a misnomer: it obscures the semantics that is clearly
>functional/OO not procedural. 
>
>Regards,
>Kay

No good points at all?  :/

Are you saying I need to present a non trivial example such as Guido's
MultiMethod decorator, or the one you proposed?  

If I'm not mistaken, there is a difference. Those axamples are
specific applications to solve specific problems using decorator
expressions. While what I'm attempting here is a general purpose
object in which many specific uses could more easily be built with.

What about commonly used trivial cases?  As a whole are they not
non-trivial?

How is it limited?

I'm still not sure when, and what type of things, should and should
not be done with decorators. 

It seems to me they may be good tools for validating inputs and
outputs, and for getting data on program performance.  In those cases,
it would be good to be able to disable them when they aren't needed.

Another use is to redefine a decorator as needed to adapt a function
to a specific input or output. Is that what Guido's multimethod does?

And they might also be used as a way to change the behavior of a group
of related functions all at once at run time in order to save a lot of
code duplication.  

I also think they could be abused easily and used when it would be
better to just use a class to do it in the first place.

Cheers,
Ron]




From mwm at mired.org  Sat Apr 16 17:51:05 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 16 Apr 2005 16:51:05 -0500
Subject: A little request about spam
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<425E7CB8.85DD2BA4@pauahtun.org>
	<20050414143640.GA94191@isis.sigpipe.cz>
	<mailman.1906.1113491179.1799.python-list@python.org>
Message-ID: <86y8bitmpi.fsf@guru.mired.org>

Ivan Van Laningham <ivanlan at pauahtun.org> writes:
> Of course I wouldn't base decisions _only_ on whether or not [PYTHON]
> appears in the subject.  But I ordinarily do base decisions on the whole
> subject line, and I think that's perfectly reasonable.  There's nothing
> else to go on without opening the message, and for HTML-based mail
> there's no surer way to let spammers know they've found a live email
> addres than to open it.  You know that.

No, I don't. My mail reader has a separate "decode" step. I can open
HTML email, and see the HTML. Actually, I usually see the ascii
version of the HTML followed by the HTML. If I want to see the HTML, I
have to tell the reader to "decode" the mail. Then it renders the HTML.

Further, I have the HTML renderer set to *not* fetch inline objects
unless/until I click on them. So even rendering the HTML won't tell
spammers anything.

In short - your mail reader needs an upgrade.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From bior_jobs at yahoo.com  Thu Apr 28 11:20:28 2005
From: bior_jobs at yahoo.com (Joe Deasy)
Date: 28 Apr 2005 08:20:28 -0700
Subject: Job openings for scientifically-oriented programmers
In-Reply-To: <1114697719.643475.284220@o13g2000cwo.googlegroups.com>
References: <1114697719.643475.284220@o13g2000cwo.googlegroups.com>
Message-ID: <1114701628.647054.219810@o13g2000cwo.googlegroups.com>

Email was scrambled by google:
Correct email address is:  bior _jobs  @ yahoo.com
(remove spaces).
I apologize for that.
- Joe Deasy



From g.brandl at gmx.net  Mon Apr  4 12:51:31 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Mon, 04 Apr 2005 18:51:31 +0200
Subject: "specialdict" module
In-Reply-To: <1112631551.683072.80970@f14g2000cwb.googlegroups.com>
References: <3bamhhF6j009lU1@individual.net>
	<mailman.1264.1112560102.1799.python-list@python.org>
	<3bb433F6fn6t3U1@individual.net>
	<1112631551.683072.80970@f14g2000cwb.googlegroups.com>
Message-ID: <3bd9jgF6heia2U1@individual.net>

Michele Simionato wrote:
> About not using super: you might have problems in multiple inheritance.
> Suppose I want to use both your defaultdict and a thirdpartdict. A
> subclass
> 
> class mydict(defaultdict, thirdpartdict):
>    pass
> 
> would not work if thirdpartdict requires a non-trivial __init__ , since
> without super in defaultdict.__init__ you would just call dict.__init__
> and not thirdpartdict.

Right. I thought about a combined defaultdict/keytransformdict,
which seems to be easy to create with the current implementation:

class defaultkeytransformdict(defaultdict, keytransformdict):
    pass

At least I hope so. This is another argument against the initializing
of defaultfactory or keytransformer in __init__.

mfg
Georg

Here comes the current module (keytransformdict should be working now
for all dict methods):

# specialdict - subclasses of dict for common tasks
#

class NoDefaultGiven(Exception):
    pass

class defaultdict(dict):
    __slots__ = ['_default']

    def __init__(self, *args, **kwargs):
        self._defaulttype = 0

        super(defaultdict, self).__init__(*args, **kwargs)

    def setdefaultvalue(self, value):
        def defaultfactory():
            return value
        self._default = (defaultfactory, (), {})

    def setdefaultfactory(self, factory, *args, **kwargs):
        if not callable(factory):
            raise TypeError, 'default factory must be a callable'
        self._default = (factory, args, kwargs)

    def cleardefault(self):
        def defaultfactory():
            raise NoDefaultGiven
        self._default = (defaultfactory, (), {})

    def __getitem__(self, key):
        try:
            return super(defaultdict, self).__getitem__(key)
        except KeyError, err:
            try:
                return self.setdefault(key, self._default[0](*self._default[1], **self._default[2]))
            except NoDefaultGiven:
                raise err

class keytransformdict(dict):
    __slots__ = ['_transformer']

    def __init__(self, *args, **kwargs):
        self._transformer = lambda x: x

        super(keytransformdict, self).__init__(*args, **kwargs)

    def settransformer(self, transformer):
        if not callable(transformer):
            raise TypeError, 'transformer must be a callable'
        self._transformer = transformer

    def __setitem__(self, key, value):
        print "setitem"
        super(keytransformdict, self).__setitem__(self._transformer(key), value)

    def __getitem__(self, key):
        print "getitem"
        return super(keytransformdict, self).__getitem__(self._transformer(key))

    def __delitem__(self, key):
        super(keytransformdict, self).__delitem__(self._transformer(key))

    def has_key(self, key):
        return super(keytransformdict, self).has_key(self._transformer(key))

    def __contains__(self, key):
        return self.has_key(key)

    def get(self, key, default):
        return super(keytransformdict, self).get(self._transformer(key), default)

    def setdefault(self, key, default):
        return super(keytransformdict, self).setdefault(self._transformer(key), default)

    def pop(self, key, default):
        return super(keytransformdict, self).pop(self._transfomer(key), default)

    def update(self, other=None, **kwargs):
        if other is not None:
            if hasattr(other, "keys"):
                super(keytransformdict, self).update((self._transformer(k), other[k]) for k in other.keys())
            else:
                super(keytransformdict, self).update((self._transformer(k), v) for (k, v) in other)
        if kwargs:
            super(keytransformdict, self).update((self._transformer(k), v) for (k, v) in kwargs.iteritems())

class sorteddict(dict):
    def __iter__(self):
        for key in sorted(super(sorteddict, self).__iter__()):
            yield key

    def keys(self):
        return list(self.iterkeys())

    def items(self):
        return list(self.iteritems())

    def values(self):
        return list(self.itervalues())

    def iterkeys(self):
        return iter(self)

    def iteritems(self):
        return ((key, self[key]) for key in self)

    def itervalues(self):
        return (self[key] for key in self)


From radam2 at tampabay.rr.com  Sun Apr  3 00:09:07 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 05:09:07 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
Message-ID: <0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>

On 2 Apr 2005 20:02:47 -0800, "El Pitonero" <pitonero at gmail.com>
wrote:

>Ron_Adam wrote:
>>
>> So I didn't know I could do this:
>>
>> def foo(a1):
>>     def fee(a2):
>>         return a1+a2
>>     return fee
>>
>> fum = foo(2)(6)   <------ !!!
>
>Ah, so you did not know functions are objects just like numbers,
>strings or dictionaries. I think you may have been influenced by other
>languages where there is a concept of static declaration of functions.

No, I did not know that you could pass multiple sets of arguments to
nested defined functions in that manner.  Just haven't ran acrossed it
in the two years I've been playing around with python. I haven't had a
reason to try it either.  But maybe now that I'm aware of it, I'll
find more uses for it.



>The last line can be better visualized as:
>
>fum = (foo(2)) (6)
>
>where foo(2) is a callable.
>
>-----------
>
>Since a function is an object, they can be assigned (rebound) to other
>names, pass as parameters to other functions, returned as a value
>inside another function, etc. E.g.:
>
>def g(x):
>    return x+3
>
>h = g # <-- have you done this before? assignment of function

Sure, I have no problem with that. Been doing it for quite a while. :)

>print h(1) # prints 4
>
>def f(p):
>    return p # <-- function as return value
>
>p = f(h) # <-- passing a function object
>
>print p(5) # prints 8
>
>Python's use of "def" keyword instead of the "=" assignment operator
>makes it less clear that functions are indeed objects. As I said
>before, this is something to think about for Python 3K (the future
>version of Python.)

I've always equated 'def' as if it were 'make', or in Python its just
a variation of 'class' for a subset of objects of type 'function'.  

>------------
>
>Function modifiers exist in other languages. Java particularly is
>loaded with them.
>
>public static synchronized double random() {
>...
>}
>
>So your new syntax:
>
>@decorator(a1)(foo)
>def foo(): 
>   pass 
>
>is a bit out of the line with other languages.

So?  Why would it need to be the same as other languages?  I like
Python because it's not the same. :)

The above syntax suggestion, just matches the already existing
behavior,

Thanks for helping BTW,  I think I have it down pretty good now. 

Cheers,
Ron




From exogen at gmail.com  Thu Apr 28 05:34:09 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 28 Apr 2005 05:34:09 -0400
Subject: Which IDE is recommended?
In-Reply-To: <du764y74djo.fsf@amadeus.cc.tut.fi>
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
Message-ID: <d4qamk$59u$1@eeyore.INS.cwru.edu>

Ville Vainio wrote:
> What version? PyDev has increased in maturity quite a bit lately.

PyDev 0.9.2 with Eclipse 3.0.2. It's a nice effort currently, but some
of my issues are:

* Code completion doesn't work properly for me, and I have no idea why.
I have to type the '.' then ADD A SPACE, *then* press Ctrl+Space. If I
type Ctrl+Space after the dot, nothing happens. So basically it's not
very useful, because I'd have to go back and get rid of the stupid space.

* Code completion isn't nearly as fast as WingIDE.

* Auto-indentation could be smarter, such as dedenting after a 'return'
statement.

* The Problems view finds 52 errors in a file with 0.

* Run As doesn't dump me into an interactive shell.

--
Brian Beck
Adventurer of the First Order


From ivanlan at pauahtun.org  Thu Apr 14 10:22:48 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Thu, 14 Apr 2005 08:22:48 -0600
Subject: A little request about spam
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
Message-ID: <425E7CB8.85DD2BA4@pauahtun.org>

Hi All--

The listowner could turn on the [PYTHON] headers.  I'm not using
spambayes yet, although I'm leaning toward it, but that step alone could
save me some work when trying to decide based on subject line alone
whether or not an email is spam.  As it stands now, it's too easy to
decide incorrectly that "Subject: Inelegant" is a spamdunk.

Metta,
Ivan

mark hellewell wrote:
> 
> On 4/14/05, James <spiralx at gmail.com> wrote:
> > Yes - it's been like that for the last month or so now and it's quite
> > annoying, especially seeing as before it was working at near enough
> > 100% accuracy.
> 
> And I don't suppose there's much we can do about it?
> 
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From python-url at phaseit.net  Mon Apr 11 15:47:46 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 11 Apr 2005 19:47:46 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
Message-ID: <mailman.1720.1113254882.1799.python-announce-list@python.org>

QOTW: "I think my code is clearer, but I wouldn't go so far as to say I'm
violently opposed to your code.  I save violent opposition for really
important matters like which text editor you use." - Roy Smith

"You need to recursively subdivide the cake until you have a piece small
enough to fit in your input buffer. Then the atomicity of the cake-ingestion
operation will become apparent." - Scott David Daniels


    Various Python Meetup groups are meeting this week:
        http://python.meetup.com/
        
    wxPython 2.5.5.1 is out...
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/7ca6358d54c9c617/84330473f542e5a6
    ... for those that don't hate it.
        http://fraca7.free.fr/blog/index.php?2005/04/04/10-a-word-about-guis
        
    A couple of nice cookbook recipes - check your docstring coverage, and let Python tell you what you meant to type.
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/355731
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/409000
        
    Exceptions are't just for errors in Python.
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/925f0b16cf56c2ab/793e0ab436c91d48

    The martellibot's working for Google!
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/c9d075e5f6b1f934/d6256652f5ffcc50
        
    Backup your del.icio.usly linked pages to Gmail.
        http://llimllib.f2o.org/blog/serve/entry/delbackup
        
    How to tell whether a wave function corresponds to bosons or fermions.
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e9cce91f429bc540/d78c7eec409154a4
    No, I'm none the wiser, either. Still, some interesting algorithms in there.
    
    Rolling your own __deepcopy__.
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/41269228e1827a87/444ac776c4ffe00f
        
    IronPython is getting good coverage these days.
        http://informationweek.com/story/showArticle.jhtml?articleID=160403713


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From jerf at jerf.org  Sun Apr 10 20:12:02 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sun, 10 Apr 2005 20:12:02 -0400
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<d3955k$kne$00$1@news.t-online.com>
	<pan.2005.04.09.21.20.39.130792@jerf.org>
	<d3b4b6$31o$00$1@news.t-online.com>
	<pan.2005.04.10.17.09.15.112872@jerf.org>
	<mailman.1650.1113163356.1799.python-list@python.org>
Message-ID: <pan.2005.04.11.00.12.01.53927@jerf.org>

On Sun, 10 Apr 2005 13:02:27 -0700, Ken Godee wrote:
> The original poster was just asking for an example of
> how to sub class his code generated form into his program
> for easy future updates, a "VERY STANDARD" way of doing it.

I recognize your sarcasm, and I recognize the poor attitude it shows, but
underneath it you do have a point. Continuing the (still IMHO very
good) OO vs. procedural metaphor, the problem is that posting a trivial
example of a dynamic interface, even were I to take the time to create one
for you for free, would meet with exactly the same response that posting
an OO snippet of some reasonable newsgroup size would receive from someone
skeptical of OO. "Well, heck, I can do that all in a procedural program,
and it would be a little shorter, too!" I am *particularly* not inclined
to post a trivial example because it would do nothing to blunt your
skepticism, or your sarcasm, and regardless, people who are genuinely
curious simply need to try it for themselves. 

The advantages only start kicking in with large programs.

But I do recall a book with similar themes, though I do not endorse it
whole-heartedly: "Software Development On A Leash", which also gives you
sample code for his particular framework.

http://www.apress.com/book/bookDisplay.html?bID=29

My opinion of this book is like my opinion of XP: Every serious programmer
ought to be exposed to the ideas contained in it (even if not by exposure
to this book or the actual XP writings), and ought to give them serious
thought, but 100% acceptance is not necessary.

To address your sarcasm directly, there's 456 pages of examples in
professionally written prose and real code samples, which I don't entirely
agree with but they do serve to show the point, available for the price of
$39.95. I consider my "obligation" to you discharged on this point; if you
prefer sarcasm to investing anything into your personal development,
that's your problem, not mine. (If this were a private email, I would have
just deleted it, but the underlying criticisms, even if uncivilly phrased,
bore answering.) Even though you probably won't adopt this guys framework,
if you're paid anything at all for programming you'll recover the $40 in
no time with the ideas in that book.


From roy at panix.com  Wed Apr 20 10:39:28 2005
From: roy at panix.com (Roy Smith)
Date: 20 Apr 2005 10:39:28 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <d45pj0$s4m$1@panix2.panix.com>

Antoon Pardon  <apardon at forel.vub.ac.be> wrote:
>Op 2005-04-20, Roy Smith schreef <roy at panix.com>:
>> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>>
>>> Personnaly I would like to have the choice. Sometimes I prefer to
>>> start at 0, sometimes at 1 and other times at -13 or +7.
>>
>> Argggh.  Having two (or more!) ways to do it, would mean that every time I 
>> read somebody else's code, I would have to figure out which flavor they are 
>> using before I could understand what their code meant.  That would be evil.
>
>This is nonsens. table[i] = j, just associates value j with key i.
>That is the same independend from whether the keys can start from
>0 or some other value. Do you also consider it more ways because
>the keys can end in different values?

There are certainly many examples where the specific value of the
first key makes no difference.  A good example would be

    for element in myList:
        print element

On the other hand, what output does

   myList = ["spam", "eggs", "bacon"]
   print myList[1]

produce?  In a language where some lists start with 0 and some start
with 1, I don't have enough information just by looking at the above
code.


From lothar at ultimathule.nul  Tue Apr  5 12:11:05 2005
From: lothar at ultimathule.nul (lothar)
Date: Tue, 5 Apr 2005 16:11:05 -0000
Subject: re module non-greedy matches broken
References: <mailman.1325.1112651826.1799.python-list@python.org>
Message-ID: <1155e6kak0ufk60@corp.supernews.com>

give an re to find every innermost "table" element:

innertabdoc = """
<table border="0" cellspacing="0" cellpadding="0">
  <tr><td>
<table border="0" cellspacing="0" cellpadding="0">
  <tr><td> <a>n</a>
  </td></tr>
</table>
  </td></tr>
</table>
<table border="0" cellspacing="0" cellpadding="0">
  <tr><td>
<table border="0" cellspacing="0" cellpadding="0">
  <tr><td> </td> <td>
<table border="0" cellspacing="0" cellpadding="0">
  <tr><td> <p>y</p> <td> z</td>
  </td></tr>
</table>
  </td></tr>
</table>
  </td></tr>
  <tr><td>
<table border="0" cellspacing="0" cellpadding="0">
  <tr><td>
  </td></tr>
</table>
  </td></tr>
</table>
"""

give an re to find every "pre" element directly followed by an "a" element:

preadoc = """
<pre>
a <i>r</i> n
</pre>
<pre>
<b>l</b> y
</pre><a href="#n1"></a>
<pre>
r
</pre>
<pre>
f <font>g</font> z
</pre>
<pre>
m <i>b</i> u <i>c</i> v
</pre><a href="#n2"></a>
<pre>
u
</pre>
"""

"John Ridley" <ojokimu at yahoo.co.uk> wrote in message
news:mailman.1325.1112651826.1799.python-list at python.org...
>

> Could you post some real-world examples of the problems you are trying
> to deal with, please? Trying to come up with general solutions for
> arbitrarily complex patterns is a bit to hard for me :)






From onurb at xiludom.gro  Mon Apr 18 11:42:16 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Mon, 18 Apr 2005 17:42:16 +0200
Subject: Zope3 and Plone
In-Reply-To: <1113835544.983163.202080@z14g2000cwz.googlegroups.com>
References: <1113835544.983163.202080@z14g2000cwz.googlegroups.com>
Message-ID: <4263d559$0$24682$626a14ce@news.free.fr>

Mir Nazim wrote:
> Hi,
> 
> I wanted to know what will happen to plone once Zope3 will be official
> version. 
(snip)
> what should be done. 
> 
Ask on the Plone mailing list ?-)

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


From sizer at nospam.com  Thu Apr 14 15:51:04 2005
From: sizer at nospam.com (Sizer)
Date: 14 Apr 2005 14:51:04 -0500
Subject: Looking for a very specific type of embedded GUI kit
References: <Xns963695069E82Esizernospamcom@216.40.28.87>
Message-ID: <Xns963882D37A06Esizernospamcom@216.40.28.86>

Thanks for your suggestions - after digging into SDL it looks pretty darn 
easy to add your own primitive devices at the low level (in src/video/), so 
that seems like the way to go. Once SDL is working, plenty of kits run on 
top of it.


From flippa at flippac.org  Thu Apr  7 18:04:21 2005
From: flippa at flippac.org (Philippa Cowderoy)
Date: Thu, 7 Apr 2005 23:04:21 +0100
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d33rsf$9ng$1@news.cs.tu-berlin.de>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<1498066.d23UzBfE8y@yahoo.com>
	<3b5ui7F6h0vgtU1@individual.net> <d33rsf$9ng$1@news.cs.tu-berlin.de>
Message-ID: <Pine.WNT.4.61.0504072302060.1940@SLINKY>

On Thu, 7 Apr 2005, Frank Wilde wrote:

>> Continuations rule!
>
> While continuations are a very interesting abstraction, the improvement
> of structured programming was to be able to prove properties of your
> programs in time linear to the size of the program instead of quadratic.
> I don't see how giving arguments to the GOTO would help there.
>

By allowing you to build your own control structures, whose properties you 
prove once before using them to prove properties in the programs that use 
them.

-- 
flippa at flippac.org

There is no magic bullet. There are, however, plenty of bullets that 
magically home in on feet when not used in exactly the right circumstances.


From Sylvain.Thenault at logilab.fr  Thu Apr 14 10:04:40 2005
From: Sylvain.Thenault at logilab.fr (Sylvain =?iso-8859-1?Q?Th=E9nault?=)
Date: Thu, 14 Apr 2005 16:04:40 +0200
Subject: [ANN] pylint 0.6.4
Message-ID: <20050414140440.GC5591@logilab.fr>

Hello all,

I'm pleased to announce a new release of PyLint. This release mainly
fixes multivalued options bug and a systematic crash with python 2.2.
Users should also use the latest logilab's common library (0.9.3).


What's new ?
------------
* allow to parse files without extension when a path is given on the
  command line (test noext)
	
* don't fail if we are unable to read an inline option  (e.g. inside a
  module), just produce an information message (test func_i0010)

* new message E0103 for break or continue outside loop (close #8883,
  test func_continue_not_in_loop)

* fix bug in the variables checker, causing non detection of some
  actual name error (close #8884, test
  func_nameerror_on_string_substitution)
	
* fix bug in the classes checker which was making pylint crash if
  "object" is assigned in a class inheriting from it (test 
  func_noerror_object_as_class_attribute)
	
* fix problem with the similar checker when related options are
  defined in a configuration file

* new --generate-man option to generate pylint's man page (require the
  latest logilab.common (>= 0.9.3)

* packaged (generated...) man page


What is pylint ?
----------------

Pylint is a python tool that checks if a module satisfy a coding
standard. Pylint can be seen as another pychecker since nearly all
tests you can do with pychecker can also be done with Pylint. But
Pylint offers some more features, like checking line-code's length,
checking if variable names are well-formed according to your coding
standard, or checking if declared interfaces are truly implemented,
and much more (see http://www.logilab.org/pylint/ for the complete
check list). The big advantage with Pylint is that it is highly
configurable, customizable, and you can easily write a small plugin to
add a personal feature.

The usage it quite simple :

$ pylint mypackage.mymodule
        

This command will output all the errors and warnings related to the
tested code (here : mypackage.mymodule), will dump a little summary at
the end, and will give a mark to the tested code.

Pylint is free software distributed under the GNU Public Licence.


Home page
---------
http://www.logilab.org/projects/pylint

Download
--------
ftp://ftp.logilab.org/pub/pylint

Mailing list
------------
mailto://python-projects at logilab.org


-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org



From fabio.pliger at siavr.it  Sat Apr  9 08:58:09 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Sat, 09 Apr 2005 12:58:09 GMT
Subject: change the date string into timestamp
References: <mailman.1610.1113039505.1799.python-list@python.org>
Message-ID: <BjQ5e.36540$IN.693557@twister2.libero.it>

You can use some date/time modules as:
time built in module
datetime
wxDatetime from wx

just take a look in the documentation... they are very simple to use.

F.P.

"praba kar" <prabapython at yahoo.co.in> ha scritto nel messaggio
news:mailman.1610.1113039505.1799.python-list at python.org...
> Dear All,
>
>     In Php strtotime() will change a date
> string into timestamp.  I want to know which
> python function will  change a date string
> into timestamp.
>
>
> Date string format is below
>
> Fri, 8 Apr 2005 09:22:14 +0900
>
> regards
> Prabahar
>
> ________________________________________________________________________
> Yahoo! India Matrimony: Find your life partner online
> Go to: http://yahoo.shaadi.com/india-matrimony




From eldiener_no_spam_here at earthlink.net  Sat Apr  2 13:05:49 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Sat, 02 Apr 2005 18:05:49 GMT
Subject: Name of IDLE on Linux
Message-ID: <1aB3e.2319$44.1393@newsread1.news.atl.earthlink.net>

What is the name of the IDLE program on Linux and where is it installed 
in a normal Linux distribution ? I have installed all the Python 2.3.5 
RPMs on my Fedora 3 system but I have no idea where they are installed 
or what IDLE is called. I lloked in the Python web pages to try to find 
a list of the files in the various installations, but was unable to find 
the information.


From codecraig at gmail.com  Fri Apr 15 09:54:35 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 06:54:35 -0700
Subject: Is Python appropriate for web applications?
In-Reply-To: <425fbed1$0$10366$636a15ce@news.free.fr>
References: <op.so85a1bgr3xrds@sony><425fbed1$0$10366$636a15ce@news.free.fr>
Message-ID: <1113573275.035694.281060@g14g2000cwa.googlegroups.com>

for more information on web application frameworks check out

http://pyre.third-bit.com/pyweb/

It is a project aimed at helping web app developers to figure out which
frameworks to use, etc.

good luck!



From rkern at ucsd.edu  Fri Apr 22 03:45:11 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 22 Apr 2005 00:45:11 -0700
Subject: regarding system function
In-Reply-To: <20050422073533.28224.qmail@web8408.mail.in.yahoo.com>
References: <20050422073533.28224.qmail@web8408.mail.in.yahoo.com>
Message-ID: <d4a9pj$k9e$1@sea.gmane.org>

praba kar wrote:

> I agree above statement but When I delete a directory
> os.system('rm -rf test')
> 0
> if directory is not present then I again try to
> delete
> os.system('rm -rf test') 
> now this time also It will print
> 0

As Roman Neuhauser says, this is the correct behavior of the -f switch 
for rm.

In [4]:os.system('rm -r foo')
rm: foo: No such file or directory
Out[4]:256

In [5]:os.system('rm -rf foo')
Out[5]:0

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From bogus@does.not.exist.com  Fri Apr 15 11:55:02 2005
From: bogus@does.not.exist.com ()
Date: Fri, 15 Apr 2005 15:55:02 -0000
Subject: (no subject)
Message-ID: <mailman.3.1572215320.3356.python-list@python.org>

#! rnews 2153
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!195.241.76.212.MISMATCH!transit1.news.tiscali.nl!transit0.news.tiscali.nl!tiscali!newsfeed1.ip.tiscali.net!proxad.net!proxad.net!newshosting.com!nx02.iad01.newshosting.com!novia!feed2.newsreader.com!newsreader.com!newsread.com!news-xfer.newsread.com!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: Python's use in RAD
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqxvf6o12c9.fsf at cola2.ca.boeing.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Lines: 46
Sender: hgg9140 at cola2.ca.boeing.com
Organization: The Boeing Company
References: <mailman.1972.1113576517.1799.python-list at python.org>
Mime-Version: 1.0
Date: Fri, 15 Apr 2005 15:33:58 GMT
Xref: news.xs4all.nl comp.lang.python:372620

"Ross Cowie" <ross1cowie at hotmail.com> writes:

> Hi,
> 
> I am currenly a second year university student and was wondering if
> you could help me ut. As part of a project i have decided to write
> about python, i am not having very much luck with regards to finding
> infrmation on pythons use in Rapid Application Development, and was
> wondering of you could highlight some of the features that make it
> suitable for RAD. Like the use of dinamic binding.
> 
> Your healp would be appreciated.
> 
> Hope to hear from you soon.
> 
> Ross
> 
> 

Generally we don't do homework here.   But we can give you pointers.

1. Searching google for "python RAD" shows 148,000 hits, and at least
   the first few pages look relevant.  Did you check?

2. "RAD" means different things to different people.   Do you mean:
a) Agile/Extreme Programming (2 or more people working together)
b) Test-driven
c) GUI builder
d) Rapid edit-run cycle
e) Lots of libraries so your work is just hooking together existing tools
f) Dynamic, code-generated-on-the-fly, or other meta programming
g) Project management experience in life cycle flow times and labor costs

You need to understand your assignment in these terms, then you can
investigate Python.

3. As a practical matter, Python does "a"-"g" quite well.  Originally
this was because of the rich-yet-clean syntax and batteries-included
libraries.  These days those factors still count, but they are
enhanced by large numbers of "other" libraries and tools which have
Python bindings.

-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From bvande at po-box.mcgill.ca  Thu Apr 21 16:46:04 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Thu, 21 Apr 2005 16:46:04 -0400
Subject: New line
In-Reply-To: <42680edf_3@mk-nntp-2.news.uk.tiscali.com>
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
	<mailman.2246.1114115139.1799.python-list@python.org>
	<42680edf_3@mk-nntp-2.news.uk.tiscali.com>
Message-ID: <4268110C.2090704@po-box.mcgill.ca>

ionic said unto the world upon 2005-04-21 16:34:
> Ok sorry guys,
> 
> using the python gui, if i hit the 'enter' key python just executes what
> ever ive typed.  It doesnt take me to the next line.
> 
> How do i type several lines without executing after each line?
> 
> Cheers


A bit more precision in your question would help. I'm going to assume 
that by "Python GUI" you mean IDLE.

You are likely trying to work in the interactive prompt. Very useful, 
but not for writing programs to save. For that, File->New and you will 
be in an IDLE window that lets you edit, run, and save files. (Be sure 
to save them with the .py extension, as IDLE doesn't automatically do so.)

Best,

brian vdB


From steve at holdenweb.com  Thu Apr 21 11:21:40 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 11:21:40 -0400
Subject: python classes/file structure
In-Reply-To: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>
References: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>
Message-ID: <d48g5l$fs5$1@sea.gmane.org>

codecraig wrote:
> What is the best/common way to structure ur python code for an
> application?
> 
> For example...if I create some custom GUI widgets I have this
> 
> C:\stuff
>     --> gui
>         --: MyCustomWidget.py
>     --: TestWidgets.py
> 
> so MyCustomWidget.py has one class, class MyCustomWidget: ...
> 
> so from TestWidgets.py i have to do this
> 
> from gui import *
> 
> widget = gui.MyCustomWidget.MyCustomWidge()
> 
> ...seems weird, how should I structure this?  Is it not common to have
> one class in a .py?
> 
> thanks
> 
gui/__init__.py should import MyCustomWidget. Then

from gui import *

will inject the "MyCustomWidget" name into the namespace of the 
TestWidgets module along with all other names defined by gui/__init__.py 
- you can control this by putting the names as strings in the "__all__" 
variable in __init__.py.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From beman at acm.org  Tue Apr  5 12:12:40 2005
From: beman at acm.org (Beman Dawes)
Date: Tue, 05 Apr 2005 16:12:40 GMT
Subject: os.path query functions behavior incorrect?
Message-ID: <YNy4e.25743$k66.11680@trnddc03>

The docs for os.path.exists(), isdir(), and the like, do not describe 
behavior when an I/O error occurs.

Testing on Windows XP SP2 with Python 2.4.1 (#65, Mar 30 2005, 09:13:57) 
[MSC v.1310 32 bit (Intel)] on win32, on a machine with no a: drive, c: is a 
hard disk with a top level directory named "path" but without a top level 
directory named "foo", and d: is a CD drive (with no disc inserted):

>>> import os
>>> print os.path.exists("c:\\")
True
>>> print os.path.isdir("c:\\")
True
>>> print os.path.isdir("c:\\boost")
True
>>> print os.path.isdir("c:\\foo")
False

OK, that meets my expectations. But now:

>>> print os.path.exists("a:\\")
False
>>> print os.path.isdir("a:\\")
False
>>> print os.path.exists("d:\\")
True
>>> print os.path.isdir("d:\\")
True

These to me are I/O errors that should result in an exception. Doing a 
command line dir a:\ reports "The system cannot find the path specified." 
Dir d:\ reports "The device is not ready."

So are these os.path functions specified and implemented incorrectly? Should 
they instead throw exceptions for the above examples?

If they are specified and implemented correctly, what is the rationale for 
this behavior?


Thanks,

--Beman 




From dan at dontspammecauseidontlikit.com  Thu Apr 21 20:23:12 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Fri, 22 Apr 2005 08:23:12 +0800
Subject: New line
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
	<mailman.2246.1114115139.1799.python-list@python.org>
	<42680edf_3@mk-nntp-2.news.uk.tiscali.com>
Message-ID: <hrgg61lgatrg6ebugfjidgvs4stl3e69eg@4ax.com>

On Thu, 21 Apr 2005 21:34:03 +0100, "ionic" <juggs at dfgt.com> wrote:

Open a text editor and write your code.  Save the file with a .py
extension, i.e., myprogram.py.  From the command line type 'python
myfile.py'

Dan

>
>Ok sorry guys,
>
>using the python gui, if i hit the 'enter' key python just executes what
>ever ive typed.  It doesnt take me to the next line.
>
>How do i type several lines without executing after each line?
>
>Cheers



From steven.bethard at gmail.com  Mon Apr 11 14:49:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 11 Apr 2005 12:49:53 -0600
Subject: singleton objects with decorators
In-Reply-To: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
Message-ID: <QridnReZKqJNW8ffRVn-2Q@comcast.com>

Uwe Mayer wrote:
> Hi,
> 
> I've been looking into ways of creating singleton objects. With Python2.3 I
> usually used a module-level variable and a factory function to implement
> singleton objects.
> 
> With Python2.4 I was looking into decorators. The examples from PEP 318
> http://www.python.org/peps/pep-0318.html#examples
> 
> don't work - AFAIK because:
> - you cannot decorate class definitions (why was it left out?)
> - __init__ must return None
> 
> 
> However, you can use the decorator:
> 
> def singleton(f):
>     instances = {}
>     def new_f(*args, **kwargs):
>         if (f not in instances):
>             instances[f] = f(*args, **kwargs)
>         return instances[f]
>     new_f.func_name = f.func_name
>     new_f.func_doc = f.func_doc       
>     return new_f
> 
> with a class that overwrites the __new__ methof of new-style classes:
> 
> class Foobar(object):
>     def __init__(self):
>         print self
> 
>     @singleton
>     def __new__(self):
>         return object.__new__(Foobar)
> 
> Is this particularly ugly or bad?

Seems a little confoluted.  Why can't you just use something like:

class Singleton(object):
     def __new__(cls, *args, **kwargs):
         try:
             return cls.__instance__
         except AttributeError:
        	    instance = cls.__instance__ = super(Singleton, cls).__new__(
                 cls, *args, **kwargs)
             return instance

class Foobar(Singleton):
     def __init__(self):
         print self

?

STeVe


From peter at engcorp.com  Tue Apr  5 09:09:31 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 09:09:31 -0400
Subject: Super Newbie Question
In-Reply-To: <1112694325.360762.53260@z14g2000cwz.googlegroups.com>
References: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
	<3be704F6gh9p1U1@individual.net>
	<1112694325.360762.53260@z14g2000cwz.googlegroups.com>
Message-ID: <F6idnRWbaJ2WE8_fRVn-2g@powergate.ca>

Joey C. wrote:
> To reply to many of your messages (I'm using Google right now due to
> lack of a better newsreader at the moment), the issue with the
> temporary file is that when I write something new to it, if the old
> contents of the file was larger, not all of it will be overwritten.

That's not likely true, unless you're doing something
unusual here.  Are you somehow terminating the process
before it closes the file (and not using flush())?
Or are you opening the file in some kind of "update"
mode (with a "+") instead of just using "w"?  Or
something else?

Or are you just assuming that what you describe will
happen, but haven't actually tried it?

-Peter


From __peter__ at web.de  Wed Apr 20 03:14:40 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 20 Apr 2005 09:14:40 +0200
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
	<3cm9r2F6nif67U1@individual.net>
Message-ID: <d44vgg$jmr$04$1@news.t-online.com>

Greg Ewing wrote:

> Steve Holden wrote:
> 
>> I've been wondering whether it's possible to perform a similar analysis
>> on non-mapping-type format strings, so as to know how long a tuple to
>> provide,
> 
> I just tried an experiment, and it doesn't seem to be possible.
> 
> The problem seems to be that it expects the arguments to be
> in the form of a tuple, and if you give it something else,
> it wraps it up in a 1-element tuple and uses that instead.
> 
> This seems to happen even with a custom subclass of tuple,
> so it must be doing an exact type check.

No, it doesn't do an exact type check, but always calls the tuple method:

>>> class Tuple(tuple):
...     def __getitem__(self, index):
...             return 42
...
>>> "%r %r" % Tuple("ab") # would raise an exception if wrapped
"'a' 'b'"

> So it looks like you'll have to parse the format string.
 
Indeed.

Peter


From tzot at sil-tec.gr  Mon Apr 25 10:24:36 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 25 Apr 2005 17:24:36 +0300
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
Message-ID: <ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>

On Mon, 25 Apr 2005 09:23:43 -0400, rumours say that rbt
<rbt at athop1.ath.vt.edu> might have written:

>Are there any plans in the near future to support PDF files in Python as 
>    thoroughly and completely as Perl does?

Before we let you know about our plans, what are *your* plans on this
subject? :) [0]

>http://cpan.uwinnipeg.ca/search?query=pdf&mode=dist

>I love Python's clean syntax and ease of use, etc. But on some things 
>(PDF for example) as barbaric as Perl's syntax is, it does outshine 
>Python... I hate having to use Perl just to deal with PDF files.

There are two issues here: a) a language, b) its library.  You imply
that the Perl syntax outshines Python's because it has _more thorough
and complete support for PDF_, as you say.  I don't see a connection,
but rather I see a lure to provoke answers, which doesn't always work
for you.  For example, my reply would be more helpful and to the point
if that reasoning was missing from your post.

>What do others do???

Search google perhaps?  Why do you feel that the first result of the
query "python pdf" does not help you?


[0] there's an ancient myth about a peasant's cart getting stuck in the
mud, so the peasant starts calling out for help from goddess Athena.
Another peasant passing by tells him: "Syn Athena kai kheira kinei",
which means, more or less, "keep on calling Athena, but start also using
your hands."
I don't know any related myth of anglo-saxon origin to quote.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From http  Thu Apr  7 13:00:40 2005
From: http (Paul Rubin)
Date: 07 Apr 2005 10:00:40 -0700
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mailman.1479.1112871689.1799.python-list@python.org>
Message-ID: <7xvf6yzflz.fsf@ruckus.brouhaha.com>

Peter Nuttall <p.s.nuttall at durham.ac.uk> writes:
> I would just write a quicksort and have a counter in the swap function.
> A cunning way to do it would be to multiply the counter by -1 for each
> swap. if you want I can write what I had in mind. Wikipedia has a good
> article of quicksort.

Writing a sorting function from scratch for this purpose seems like
reinventing the wheel.  Tim's answer of simply counting the cycles
(without having to pay attention to their length) is really clever.  I
didn't realize you could do that.  Proving it is a cute exercise.
Hint: any cycle of odd length has an even number of swaps, and any
cycle of even length has an odd number of swaps (another exercise).

http://en.wikipedia.org/wiki/Even_and_odd_permutations
http://en.wikipedia.org/wiki/Permutation


From __peter__ at web.de  Wed Apr 20 09:03:17 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 20 Apr 2005 15:03:17 +0200
Subject: exception handling
References: <mailman.2170.1114000426.1799.python-list@python.org>
Message-ID: <d45ju5$tmr$04$1@news.t-online.com>

Mage wrote:

> def error_msg(msg):
>     sys.exit(msg)
> 
> try:
>     do_something()
>     if value != my_wish:
>        error_msg('Invalid input')
> except:
>     print "Fatal IO or Network error"
> 
> This doesn't work because sys.exit raises an exception.
> 
> I know that I can define exception types after except, but there might
> be many. Also I know I can write:
> except:
>     if str(sys.exc_info()[0]) == 'exceptions.SystemExit':
>         raise
> 
> But honestly I would like simething like that:
> 
> except (!SystemExit):
> 
> Is this possible somehow?

try:
    # may raise any exception
except SystemExit:
    raise # propagate SystemExit (and subclasses)
except:
    # handle everything else

Peter



From timothy at open-networks.net  Sat Apr 16 01:28:18 2005
From: timothy at open-networks.net (Timothy Smith)
Date: Sat, 16 Apr 2005 15:28:18 +1000
Subject: pysvn install on freebsd
Message-ID: <4260A272.2030205@open-networks.net>

has anyone used or installed this on fbsd
the install for it is totally redundant. i get this error for it

make -f freebsd.mak clean all test
cd ../Source && make -f pysvn_freebsd_py.mak clean
make: cannot open pysvn_freebsd_py.mak.
*** Error code 2

Stop in /usr/home/timothy/pysvn-1.1.2/Extension/Builder.


From jeffrey at fro.man  Sun Apr 17 17:39:00 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Sun, 17 Apr 2005 14:39:00 -0700
Subject: Decorator Syntax For Recursive Properties
References: <11640g942e65da1@corp.supernews.com>
	<d3uf05$pgp$04$1@news.t-online.com>
Message-ID: <1165lrv6s0k5l22@corp.supernews.com>

Peter Otten wrote:

>> something like this didn't work for me:
<snip>
> But this will, I suppose:
> 
> @property
> def ancestors(self):
>     if self.parent:
>         return self.parent.ancestors + [self.parent]
>     return []
>  
> A non-recursive variant:
> 
> @property
> def ancestors(self):
>     result = []
>     node = self.parent
>     while node:
>         result.append(node)
>         node = node.parent
>     result.reverse()
>     return result

Indeed, both of these patterns suit my needs. Thanks very much for the
eye-opening insights.

Jeffrey


From finite.automaton at gmail.com  Mon Apr 25 18:04:04 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 25 Apr 2005 15:04:04 -0700
Subject: Bounding box on clusters in a 2D list
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
	<1114378980.909132.216600@f14g2000cwb.googlegroups.com>
	<1114456596.990810.233630@z14g2000cwz.googlegroups.com>
	<1114457990.995627.224160@z14g2000cwz.googlegroups.com>
	<1114463614.451494.79010@o13g2000cwo.googlegroups.com>
Message-ID: <1114466644.928560.284990@o13g2000cwo.googlegroups.com>

def floodFill4(m, r, c, newCol, oldCol):
  stack = [ (r, c) ]
  while stack:
    r, c = stack.pop()
    if c >=0 and c < maxc and r >=0 and r< maxr and m[r][c]==oldCol:
      m[r][c] = newCol
      stack += [ (r+1, c), (r-1, c), (r, c+1), (r, c-1) ]



From mwm at mired.org  Sat Apr 30 17:27:44 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 30 Apr 2005 16:27:44 -0500
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org> <86is29n9cg.fsf@guru.mired.org>
	<d4l825$mj7$1@domitilla.aioe.org> <86is29kkaw.fsf@guru.mired.org>
	<d4mv93$rft$1@domitilla.aioe.org>
Message-ID: <86u0loj6pb.fsf@guru.mired.org>

Maurice LING <mauriceling at acm.org> writes:

>>>Python can then have a built-in mechanism to read the description file
>>>and download the source codes and do the standard "sudo python
>>>setup.py install" to install the library into site-package.
>> I don't like this - it would make Python depend on sudo being
>> available. I'd rather it not do that, and let each systems
>> administrator issue the command according to *their* security policy.
>
> If you are installing packages into your home directory, then sudo is
> not needed. But if you are installing it for everybody's use, then it
> is necessary. Fink runs using superuser privileges.

No, sudo isn't necessary.  It isn't provided by
default for all Unix installations, so Python would have to add a
dependency on it, which would be a bad thing.

sudo is sufficient. Other means are also sufficient. It would be wrong
for Python to assume a specific Unix security model (i.e. - "sudo")
for installations.

    <mike

-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tjreedy at udel.edu  Sun Apr 24 21:32:46 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 24 Apr 2005 21:32:46 -0400
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<116nfblc10i9340@corp.supernews.com>
Message-ID: <d4hh2e$9ck$1@sea.gmane.org>

>    According to the language reference,
>
>      An augmented assignment expression like x += 1 can be
>      rewritten as x = x + 1 to achieve a similar, but not
>      exactly equal effect. In the augmented version, x is only
>      evaluated once.
>
>    I don't consider the two results you posted "similar".

It continues
"Also, when possible, the actual operation is performed in-place, meaning 
that rather than creating a new object and assigning that to the target, 
the old object is modified instead. ...Similarly, with the exception of the 
possible in-place behavior, the binary operation performed by augmented 
assignment is the same as the normal binary operations.
"
I take the behavior observed to be the exceptional in-place behavior 
referred to.  But this could certainly be clearer.

Also, Lib Ref  2.3.6.4 Mutable Sequence Types could have a line added to 
the table specifying the the operation 's+=x' is the same as s.extend(x).

Terry J. Reedy





From bokr at oz.net  Thu Apr 21 13:32:27 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 21 Apr 2005 17:32:27 GMT
Subject: Array of Chars to String
References: <mailman.2133.1113942800.1799.python-list@python.org>
	<42673B51.4040804@v.loewis.de>
Message-ID: <4267e35a.161797031@news.oz.net>

On Thu, 21 Apr 2005 07:34:09 +0200, =?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?= <martin at v.loewis.de> wrote:

>James Stroud wrote:
>> astr = "Bob Carol Ted Alice"
>> letters = "adB"
>
>Apparently nobody has proposed this yet:
>
>>>> filter(letters.__contains__, astr)
>'Bad'
>>>> filter(set(letters).__contains__, astr)
>'Bad'
>
Baaad ;-)
But since I'm playing the other side of the table for
the moment, isn't filter to be deprecated?

Regards,
Bengt Richter


From peter at engcorp.com  Mon Apr  4 10:09:58 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 04 Apr 2005 10:09:58 -0400
Subject: redundant imports
In-Reply-To: <d2odia$aa0$1@news.comcor-tv.ru>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<T9OdnU9kdqI2NNffRVn-ow@powergate.ca>
	<i4V2e.1146141$35.42440149@news4.tin.it>
	<86zmwgx0he.fsf@guru.mired.org> <d2odia$aa0$1@news.comcor-tv.ru>
Message-ID: <kv2dnZ8EbKVK18zfRVn-sA@powergate.ca>

Serge Orlov wrote:
> Mike Meyer wrote:
> 
> 
>>The semantic behavior of "include" in C is the same as "from module
>>import *" in python. Both cases add all the names in the included
>>namespace directly to the including namespace. This usage is
>>depreciated in Python ...
> 
> 
>  Did you mean discouraged? Or it's really slated for deprecation?

Deprecated basically means "the use of this is discouraged",
though because it is often followed by a comment like
"and it will be removed in a future release", people
sometimes are misled into thinking "deprecate" refers
to the pending act of removal rather than the discouragement
itself.

So, yes, its use is deprecated (though I'm not sure if that's
by any official statement, or simply by widespread convention),
but no, that doesn't mean it is going to go away any time soon.

-Peter


From kasimov at i.com.ua  Thu Apr 21 04:44:45 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Thu, 21 Apr 2005 11:44:45 +0300
Subject: goto statement
In-Reply-To: <dqCdneMCDr764fvfRVn-tA@powergate.ca>
References: <mailman.2158.1113989043.1799.python-list@python.org>
	<dqCdneMCDr764fvfRVn-tA@powergate.ca>
Message-ID: <426767FD.5050104@i.com.ua>


1. comment for debug

    It can be used in the same way, as the comments for debugging are used, but it will be easier than to use """ or ''', or using features of text-editors,
    when it is necessary to comment piece of code which already contains ''' or/and """ strings already, or there is another #-comments.
    Using goto, you do not need to edit a code, which is unfamiliar to you.

2. obfuscators

    goto can be used in the same way, as many of java-obfuscators do


Speaking in other words:
   1) goto exempts from necessity to install new software (it is critical for remote working, for example, installing X11 may be impossible at all)
   2) enables to make new, better software (better obfuscators)

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From radam2_ at _tampabay.rr.com  Sat Apr 16 16:18:58 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Sat, 16 Apr 2005 20:18:58 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
Message-ID: <3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>

On Fri, 15 Apr 2005 16:44:58 -0700, Brian Sabbey
<sabbey at u.washington.edu> wrote:

>
>Simple Thunks
>-------------
>
>Thunks are, as far as this PEP is concerned, anonymous functions that 
>blend into their environment. They can be used in ways similar to code 
>blocks in Ruby or Smalltalk. One specific use of thunks is as a way to 
>abstract acquire/release code. Another use is as a complement to 
>generators.

I'm not familiar with Ruby or Smalltalk.  Could you explain this
without referring to them?


>A Set of Examples
>=================
>
>Thunk statements contain a new keyword, 'do', as in the example below. The 
>body of the thunk is the suite in the 'do' statement; it gets passed to 
>the function appearing next to 'do'. The thunk gets inserted as the first 
>argument to the function, reminiscent of the way 'self' is inserted as the 
>first argument to methods.
>
>def f(thunk):
>    before()
>    thunk()
>    after()
>
>do f():
>    stuff()
>
>The above code has the same effect as:
>
>before()
>stuff()
>after()

You can already do this, this way.

>>> def f(thunk):
...     before()
...     thunk()
...     after()
...
>>> def before():
...     print 'before'
...
>>> def after():
...     print 'after'
...
>>> def stuff():
...     print 'stuff'
...
>>> def morestuff():
...     print 'morestuff'
...
>>> f(stuff)
before
stuff
after
>>> f(morestuff)
before
morestuff
after
>>>

This works with arguments also.


>Other arguments to 'f' get placed after the thunk:
>
>def f(thunk, a, b):
>     # a == 27, b == 28
>     before()
>     thunk()
>     after()
>
>do f(27, 28):
>     stuff()

Can you explain what 'do' does better?

Why is the 'do' form better than just the straight function call?

	f(stuff, 27, 28)

The main difference I see is the call to stuff is implied in the
thunk, something I dislike in decorators.  In decorators, it works
that way do to the way the functions get evaluated.  Why is it needed
here?

When I see 'do', it reminds me of 'do loops'. That is 'Do' involves
some sort of flow control.  I gather you mean it as do items in a
list, but with the capability to substitute the named function.  Is
this correct?

Cheers,
Ron



From bdesth.quelquechose at free.quelquepart.fr  Thu Apr 14 15:58:10 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 14 Apr 2005 21:58:10 +0200
Subject: How to debug SOAP using TCpMon and Python?
In-Reply-To: <wNydnQ8ROuBR0sHfRVn-qw@rogers.com>
References: <wNydnQ8ROuBR0sHfRVn-qw@rogers.com>
Message-ID: <425ec741$0$865$636a15ce@news.free.fr>

Jim a ?crit :
> Hello,
> 
> I am trying to debug a Python SOAP

What about unit tests ?


From simon.brunning at gmail.com  Thu Apr 14 10:10:45 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 14 Apr 2005 15:10:45 +0100
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <lMKdnShsStt_68PfRVn-3g@powergate.ca>
References: <d3ekhf$a0f$1@lairds.us> <3c670tF6jdeqrU1@individual.net>
	<lMKdnShsStt_68PfRVn-3g@powergate.ca>
Message-ID: <8c7f10c605041407103f0fa367@mail.gmail.com>

On 4/14/05, Peter Hansen <peter at engcorp.com> wrote:
> Greg Ewing wrote:
> > (Darn. I finally say something that gets into Quote of the
> > Week, and it's attributed to someone else! :-) :-) :-)
> 
> +1 on this for meta-QOTW, solving both problems...

Yeah, but to whom do I attribute it?

;-)

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From Grossi  Fri Apr 15 23:21:03 2005
From: Grossi (Grossi)
Date: 15 Apr 2005 22:21:03 -0500
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 140)
References: <1113613608.511723.298610@o13g2000cwo.googlegroups.com>
Message-ID: <901161dqkqtr2gkhf3qb4j6mvecgb8ivuf@4ax.com>

Nuf said.


From iny+news at iki.fi  Sun Apr 24 03:36:37 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Sun, 24 Apr 2005 10:36:37 +0300
Subject: Object oriented storage with validation (was: Re: Caching compiled
 regexps across sessions (was Re: Regular Expressions - Python vs
 Perl))
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
	<mailman.2289.1114190176.1799.python-list@python.org>
	<m3k6muaxmi.fsf@iny.iki.fi> <du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi>
Message-ID: <m3ekd0vd6i.fsf_-_@iny.iki.fi>


[reorganized a bit]

Ville Vainio <ville at spammers.com> writes:

> Why don't you use external validation on the created xml? Validating
> it every time sounds like way too much like Javaic B&D to be fun
> anymore. Pickle should serve you well, and would probably remove about
> half of your code. "Do the simplest thing that could possibly work"
> and all that.

What is the point in doing validation if it isn't done every time? Why
wouldn't I do it every time? It isn't that slow thing to do.

Pickle doesn't have validation. I am not comfortable for using it as
storage format that should be reliable over years when the program
evolves. It also doesn't tell me if my program has put something other
to the data than I meant to. The program will just throw some weird
exception.

I want to do the simplest thing, but I also want something that helps
me keep the program usable also in the future. I prefer putting some
resources to get some validation to it initially than use later more
resouces to do something with undetermined lump of data.

>     >> python has shipped with a fast XML parser since 2.1, or so.
>
>     Ilpo> With what features? validation? I really want a validating
>     Ilpo> parser with a DOM interface. (Or something better than DOM,
>     Ilpo> must be object oriented.)
>
> Check out (coincidentally) Fredrik's elementtree:
>
> http://effbot.org/zone/element-index.htm

At least the interface looks quite simple and usable. With some
validation wrapping over it, it might be ok...

>     Ilpo> And my point is that the regular expression compilation can
>     Ilpo> be a problem in python. The current regular expression
>     Ilpo> engine is just unusable slow in short lived programs with a
>     Ilpo> bit bigger amount of regexps. And fixing it should not be
>     Ilpo> that hard: an easy improvement would be to add some kind of
>     Ilpo> storing mechanism for the compiled regexps. Are there any
>     Ilpo> reasons not to do this?
>
> It should start life as a third-party module (perhaps written by you,
> who knows :-). If it is deemed useful and clean enough, it could be
> integrated w/ python proper. This is clearly something that should not
> be in the python core, because the regexps themselves aren't there
> either.

How can it work automatically in separate module? Replacing the
re.compile with something sounds possible way of getting the regexps,
but how and where to store the compiled data? Is there a way to put it
to the byte code file?

Maybe I need to take a look at it when I find the time...

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From franz.steinhaeusler at utanet.at  Thu Apr 28 03:52:53 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Thu, 28 Apr 2005 09:52:53 +0200
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
	<1114612588.435456.296960@z14g2000cwz.googlegroups.com>
Message-ID: <pd5171dmt0lfj8bu4qtji28dq6smeuhlq1@4ax.com>

On 27 Apr 2005 07:36:28 -0700, "Matt" <matt.fryer at gmail.com> wrote:

>The ActiveGrid IDE is a sample app with wxPython. It has a lot of good
>features including a source code debugger that allows you to debug wx
>apps and set breakpoints from the code editor. I am also biased
>though--I work on that IDE and use it for all my coding. Its pretty far
>along on Windows and getting better on Linux. We just got it working on
>a Mac yesterday so that version won't be out for a bit.

Little OT:

I tried to run or debug the current open file. but it didn't work.
As I found no forum, I ask here:

Traceback (most recent call last):
  File
"C:\Python24\Lib\site-packages\wx-2.6-msw-ansi\wx\lib\pydocview.py",
line
 930, in ProcessEvent
    return DocMDIParentFrameMixIn.ProcessEvent(self, event)
  File
"C:\Python24\Lib\site-packages\wx-2.6-msw-ansi\wx\lib\pydocview.py",
line
 325, in ProcessEvent
    return wx.GetApp().ProcessEvent(event)
  File
"C:\Python24\Lib\site-packages\wx-2.6-msw-ansi\wx\lib\pydocview.py",
line
 1636, in ProcessEvent
    if service.ProcessEvent(event):
  File "C:\Programme\wxPython2.6 Docs and
Demos\samples\ide\activegrid\tool\Debu
ggerService.py", line 1534, in ProcessEvent
    self.OnRunProject(event)
  File "C:\Programme\wxPython2.6 Docs and
Demos\samples\ide\activegrid\tool\Debu
ggerService.py", line 1633, in OnRunProject
    dlg = CommandPropertiesDialog(self.GetView().GetFrame(), 'Run',
projectServi
ce, None)
  File "C:\Programme\wxPython2.6 Docs and
Demos\samples\ide\activegrid\tool\Debu
ggerService.py", line 1933, in __init__
    self._selectedProjectDocument =
self._projectDocumentList[selectedIndex]
IndexError: list index out of range

Where to ask for help otherwise?

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From jorl.shefner at comcast.net  Fri Apr 15 09:30:00 2005
From: jorl.shefner at comcast.net (Jorl Shefner)
Date: 15 Apr 2005 06:30:00 -0700
Subject: new to mac OS10
In-Reply-To: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
Message-ID: <1113571800.485209.169320@z14g2000cwz.googlegroups.com>

If you simply want the latest python to run from the command line, then
compiling the source code works fine on the mac.  I just installed
2.4.1 on Os 10.3.8 last week without any problems.

http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz

"./configure"
"make"
"make install"

J.S.



From timothy.grant at gmail.com  Thu Apr 14 10:45:08 2005
From: timothy.grant at gmail.com (Timothy Grant)
Date: Thu, 14 Apr 2005 07:45:08 -0700
Subject: A little request about spam
In-Reply-To: <d3fd6366050414054728665d7e@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
Message-ID: <e775286d05041407456b88bc53@mail.gmail.com>

On 4/14/05, mark hellewell <mark.hellewell at gmail.com> wrote:
> On 4/14/05, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> > Please do not reply to spam. Replying to spam makes it much harder for
> > spam filters to catch all the spam or will produce very many false
> > positives. Atleast that's how gmail's filter works. And if you must
> > reply, please change the subject line.
> 
> Is anybody else finding that Gmails spam filter has started
> labelling a lot of python-list emails as spam? About 20
> python-list emails a day end up getting caught by their
> filter and I'm having to manually go in and mark them
> as "Not spam".

Absolutely! I didn't know if it were just me or what but starting a
couple of weeks ago, The filter went from near perfect to trapping 20+
good emails per day.

Very annoying.

-- 
Stand Fast,
    tjg.


From rkern at ucsd.edu  Mon Apr 25 07:27:18 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 04:27:18 -0700
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <426CBF86.4040407@freemail.gr>
References: <86ll77pgqz.fsf@guru.mired.org>	<mailman.2430.1114408769.1799.python-list@python.org>	<426CB5DC.1050301@freemail.gr>	<mailman.2437.1114424277.1799.python-list@python.org>
	<426CBF86.4040407@freemail.gr>
Message-ID: <d4ijt5$2cg$1@sea.gmane.org>

jfj wrote:
> Robert Kern wrote:
> 
>> jfj wrote:
>>
>>> 2) to convert a list/tuple/string to a list, which is
>>> done extremely fast.
>>
>> Add "any iteratable". Genexps are iterables.
> 
> The thing is that when you want to convert a tuple to a list
> you know already the size of it and you can avoid using append()
> and expanding the list gradually.  For iterables you can't avoid
> appending items until StopIteration so using list() doesn't have
> any advantage.

But no real disadvantage either.

> The OP was about genexps vs list comprehensions
> but this is about list() vs. list comprehensions.

Yes, and list(genexp) replaces list comprehensions rather handily. 
There's very little reason to prefer list comprehensions over the 
list(genexp) construction. If anything, it's pretty much a wash. That 
was the OP's question:

[mike]
 > when would I use a list comp instead of a generator expression if
 > I'm going to require 2.4 anyway?

>> Possibly. I find them too similar with little enough to choose between 
>> them, hence the OP's question. 
> 
> One solution is to forget about list().  If you want a list use []. 
> Unless you want to convert a tuple...
> 
> I think a better question would be "What do *generator expressions* do
> that list comprehensions don't?".  And always use list comprehensions
> unless you want the extra bit.

<shrug> What we have now are two very similar constructs, one of which 
is more general and subsumes nearly all the uses of the other. The 
presence of both is confusing, as evidenced by the fact that the OP 
asked his question. In the Great Breaking of Backwards Compatibility, 
list comprehensions should go away.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From dalke at dalkescientific.com  Sat Apr  9 14:17:27 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Sat, 09 Apr 2005 18:17:27 GMT
Subject: Counting iterations
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
	<1113064744.144787.315120@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2005.04.09.18.17.29.903696@dalkescientific.com>

runes wrote:
> You should avoid the "a" + "b" + "c" -kind of concatenation. As strings
> at immutable in Python you actually makes copies all the time and it's
> slow!

The OP wrote

    print "pet" + "#" + num_pets

(properly str(num_pets) )

You recommended the "alternative used in Steven Bethard's example"

     print 'pet#%i' % (i + 1)

because "it's slow".  I disagree, it isn't for this code.
It's comparable in performance to interpolation and most
of the time is spent in converting int -> string.  Indeed
if the object to be merged is a string then the addition
version is faster than interpolation.

Here's the details.

The string concatenation performance that you're
talking about doesn't hit until there are multiple
appends to the same string, where "multiple" is rather
more than 2.  The advice usually applies to things like

  text = ""
  for line in open(filename, "U"):
    text += line

which is much slower than, say
  lines = []
  for line in open(filename, "U")
    lines.append(line)
  text = "".join(lines)

or the more modern
  text = "".join(open(filename, "U"))

to say nothing of
  text = open(filename, "U").read()  :)

Anyway, to get back to the example at hand,
consider what happens in 

  "pet#%i" % (i+1)

(NOTE: most times that's written %d instead of %i)

The run-time needs to parse the format string
and construct a new string from the components.
Internally it does the same thing as 

   "pet#" + str(i+1)

except that it's done at the C level instead
Python and the implementation overallocates
100 bytes so there isn't an extra allocation
in cases like this.

Personally I would expect the "%" code to be
about the same performance as the "+" code.


Of course the real test is in the timing. 
Here's what I tried.  NOTE: I reformatted by
hand to make it more readable.  Line breaks and
the \ continuation character may have introduced
bugs.

First, the original code along with the 'str()'
correction.

% python /usr/local/lib/python2.3/timeit.py -s \
'pets = ["cat", "dog", "bird"]' \
'num_pets=0' 'for pet in pets:' \
'  num_pets += 1' \
'  s="pet" + "#" + str(num_pets)'
100000 loops, best of 3:
14.5 usec per loop


There's no need for the "pet" + "#" so I'll
turn that into "pet#"

% python /usr/local/lib/python2.3/timeit.py -s \
'pets = ["cat", "dog", "bird"]' \
'num_pets=0' \
'for pet in pets:' \
' num_pets += 1' \
'  s="pet#" + str(num_pets)' 
100000 loops, best of 3: 12.8 usec per loop 

That's 1.3 extra usecs.

By comparison here's the "%" version.

% python /usr/local/lib/python2.3/timeit.py -s \
'pets = ["cat", "dog", "bird"]'\
'num_pets=0' \
'for pet in pets:' \
' num_pets += 1' \
'  s="pet#%s" % num_pets' 
100000 loops, best of 3: 10.8 usec per loop

I'm surprised that it's that much faster - a
good 2 microseconds and that isn't the only
code in that loop.

But both the "%" and "+" solutions need to
convert the number into a string.  If I
use an existing string I find

% python /usr/local/lib/python2.3/timeit.py -s \
'pets = ["cat", "dog", "bird"]' \
'num_pets=0' \
'for pet in pets:' \
' num_pets += 1' \
'  s="pet#" + pet'
100000 loops, best of 3: 4.62 usec per loop

So really most of the time - about 8 usec - is
spent in converting int -> string and the
hit for string concatenation or interpolation
isn't as big a problem.

Compare with the string interpolation form
of the last version

% python /usr/local/lib/python2.3/timeit.py -s \
'pets = ["cat", "dog", "bird"]' \
'num_pets=0' 'for pet in pets:' \
' num_pets += 1' \
'  s="pet#%s" % pet' \
100000 loops, best of 3: 7.55 usec per loop


In this case you can see that the % version is
slower (by 2usec) than the + version.

I therefore disagree with the idea that simple
string concatenation is always to be eschewed
over string interpolation.

				Andrew
				dalke at dalkescientific.com



From chris at angband.org  Wed Apr 27 15:52:19 2005
From: chris at angband.org (Operation Latte Thunder)
Date: Wed, 27 Apr 2005 19:52:19 +0000 (UTC)
Subject: Shutting down twisted reacotr
Message-ID: <d4oqhj$he4$1@news-int2.gatech.edu>

I have a simple ( I hope ) problem that I have been baning my head against
all day.  I have isolated it down to a very small demo script, which I
will include below.

Basically, I want to have twisted run until an event makes it stop. My
problem is that my reactor.stop() doesn't seem to do anything if its not
called via a calllater or an equivilent.  Unfortunately, my google-fu
seems weak today, as I have not been able to discern its solution.
Without further adieu:

from thread import start_new_thread
import time
from twisted.internet import reactor

def shutdown():
        time.sleep( 1 )
        print "Stopping"
        reactor.stop()

start_new_thread ( shutdown, () )

reactor.run()
print "done"

This will continue to run even after printing "Stopping"

any ideas?

-- 
chris at acheris.net			|             Roma Invicta!


From benmarkwell at gmail.com  Fri Apr  1 22:53:55 2005
From: benmarkwell at gmail.com (Ben)
Date: 1 Apr 2005 19:53:55 -0800
Subject: New to programming question
In-Reply-To: <424d1573.11134991@news.oz.net>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<0_63e.19914$C7.11056@news-server.bigpond.net.au>
	<B%63e.19916$C7.1024@news-server.bigpond.net.au>
	<424d1573.11134991@news.oz.net>
Message-ID: <1112414035.125070.226060@f14g2000cwb.googlegroups.com>

Joal was right.  It is a bit beyond me.  But I appreciate your response.



From martin.witte at gmail.com  Sat Apr 30 07:32:46 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Apr 2005 04:32:46 -0700
Subject: Library Naming Conventions.
In-Reply-To: <1114851378.781754.194030@z14g2000cwz.googlegroups.com>
References: <1114851378.781754.194030@z14g2000cwz.googlegroups.com>
Message-ID: <1114860766.488589.152380@o13g2000cwo.googlegroups.com>

see http://www.python.org/peps/pep-0008.html for naming conventions and
other style issues



From bokr at oz.net  Sat Apr  2 16:59:54 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 02 Apr 2005 21:59:54 GMT
Subject: Performance issue
References: <edce2a2e05040207452bb2a1ad@mail.gmail.com>
	<mailman.1240.1112466613.1799.python-list@python.org>
Message-ID: <424f118c.141207545@news.oz.net>

On Sat, 02 Apr 2005 10:29:19 -0800, Shalabh Chaturvedi <shalabh at cafepy.com> wrote:

>Tom Carrick wrote:
>> Hi,
>> 
>> In my attempted learning of python, I've decided to recode an old
>> anagram solving program I made in C++. The C++ version runs in less
>> than a second, while the python takes 30 seconds. I'm not willing to
>> think it's just python being slow, so I was hoping someone could find
>> a faster way of doing this. Also, I was wondering if there was a more
>> builtin, or just nicer way of converting a string to a list (or using
>> the sort function on a list) than making a function for it.
>
><code snipped>
>
>Others have already given a good commentary and alternate suggestions. 
>Here is some more (and some disagreements):
>
>* Know your data structures (and how long different operations take). 
>Like don't do del L[0] unless required. This generally comes from 
>experience (and asking on this list).
>
>* list(any_sequence_here) will build a list from the sequence. There are 
>usually easy ways of converting built-in types - the Python docs will 
>help you here.
>
>* Try to write code as close to an english description of the problem as 
>possible. For example 'for word in words:' rather than using counters 
>and []. This is usually faster, clearer and IMO an important ingredient 
>of being 'Pythonic'.
>
>Anyway here's my rendition of your program:
>
>###
>anagram = raw_input("Find anagrams of word: ")
>lanagram = list(anagram)
>lanagram.sort()
>sorted_anagram = ''.join(lanagram).lower()
>
>f = open('/usr/share/dict/words', 'r')
>
>found = []
>
>for word in f:
>     word = word.strip('\n')
>     if len(word)==len(sorted_anagram):
>	sorted_word = list(word)
>	sorted_word.sort()
>	sorted_word = ''.join(sorted_word)
>         if sorted_word == sorted_anagram:
>	    found.append(word)
>
>print "Anagrams of %s:" % anagram
>
>for word in found:
>     print word
>###
>
>Hopefully it is fast enough.
>
If doing more than one anagram, I think making a set of anagram
dictionaries (one for each word length) and pickling them in
separate files for later re-use might help.

E.g., (untested!!) to make a dict (by wordlength) of anagram dicts, something like

d = {}
for word in open('/usr/share/dict/words'):
    word = word.strip().lower()
    d.setdefault(len(word), {}).setdefault(''.join(sorted(word)), []).append(word)))

Then
for wlen, adic in d.items():
    pickle_file_name = 'anagram_%s'% wlen
    # pickle adic and write it out to the file
    ...

Then the anagram utility can look for the appropriate pickle file per word length,
(i.e., 'anagram_%s'%len(word.strip())) and just load it to anadict and
print anadict(''.join(sorted(word.strip().lower())).

That's a sketch. Untested!! Gotta go ;-/

Regards,
Bengt Richter


From dcrespo at gmail.com  Mon Apr 11 16:10:46 2005
From: dcrespo at gmail.com (dcrespo)
Date: 11 Apr 2005 13:10:46 -0700
Subject: Distributing Python Apps and MySQL
In-Reply-To: <d343us$d54$1@nemesis.news.tpi.pl>
References: <1112887332.324949.318960@z14g2000cwz.googlegroups.com>
	<d341ij$lud$1@solaris.cc.vt.edu> <d343us$d54$1@nemesis.news.tpi.pl>
Message-ID: <1113250246.331556.308900@z14g2000cwz.googlegroups.com>

Hi. Thank you for your answer. I had been working on NSInstaller since
it was the first one I looked up.
I take advantage of this comment to say that NSInstaller really works
(for whoever that is reading this) ;)



From jdh2358 at gmail.com  Mon Apr 18 16:40:09 2005
From: jdh2358 at gmail.com (jdh2358 at gmail.com)
Date: 18 Apr 2005 13:40:09 -0700
Subject: ANN: Veusz 0.5 - a scientific plotting package
References: <mailman.2027.1113746240.1799.python-announce-list@python.org>
	<mailman.2036.1113789043.1799.python-list@python.org>
	<1113810917.134164.113060@g14g2000cwa.googlegroups.com>
	<pan.2005.04.18.10.10.58.36795@jeremysanders.net>
Message-ID: <1113856809.069302.17250@g14g2000cwa.googlegroups.com>

Hi Jeremy,

I'm the matplotlib author -- I'm writing under a different email
address since my email server seems to be dying...

I'll start by saying that I for one won't criticize you for rolling you
own plotting package rather than join forces with an existing project.
I've been accused of the same, on more than one occasion :-)  But I'm
also aware of the problem that this creates -- the tyranny of choice.
python is so fun to code in that many developers are looking for a
reason to find an existant package inadequate so they have an excuse to
write their own replacement.  Hence we have a proliferation of web-app
frameworks, plotting packages, array objects and so on.  There is a lot
of duplicated effort in many arenas and it would be nice to collaborate
more.

I read over your scipy list of problems that you found in matplotlib --
some were helpful and some, as you note, have been long fixed.  One
critique you might flesh out for me is the notion that matplotlib's
object model is baroque -- most of the developers feel the object model
is fairly solid.  You weren't by chance, trying to use the procedural
pylab (aka matlab) interface, were you, since pylab itself is just a
wrapper of the OO matplotlib API?  One area in the object model that we
plan to change is to make high level plot objects (scatter, error,
histogram) etc, proper objects, ala gnuplot.  Right now they are
methods that generate primitive objects (lines, rectangles, text, etc).

Another area you identify as a problem with matplotlib is the need to
regenerate the entire graph when one property is changed.  This is true
in one way and false in another.  matplotlib does have a proper object
model -- eg, you can selectively change the facecolor of a marker w/o
regenerating the graph scene.  But the *drawing* hierarchy (as opposed
to the object hierarchy) needs some work .  Once you have changed a
property, the entire graph is redrawn.  This is a known limitation and
will change in the not-too-distant-future.  One advantage of working in
mainstream in open source software is the network effect.  With 10
some-odd developers including institutions such as the U of C, STScI,
JPL and NOAA, bugs and limitations of matplotlib tend to be fixed
within minutes, days, weeks or months.

Your package looks very nice.  It specifically addresses two
limitations in matplotlib that we would like to address -- a GUI
interface for creating figures and a way to save the figure at any
point as a high level description (rather than an image).  I do wish
you had publicly voiced the problems you ran into along the way; I just
searched the archives and saw only one post from you on the users list
which I answered 28 minutes later with

http://sourceforge.net/mailarchive/message.php?msg_id=10124206

after which I never heard from you again.  Such response times are
fairly typical on the list, but if you don't report the bugs and follow
up on the suggested fixes, we can't fix them.

Anyway, nice work on veusz.  Are you committed to the GPL license?
matplotlib uses a more permissive license (PSF compatible) mainly to
encourage contributions from the commercial sector.  As you suggest, it
is still possible for someone to take the work you've done on the GUI
frontend and expose matplotlib as a backend based on your prior
experiments.  The NASA Jet Propulsion Laboroatory and others are
supporting the QT backend, and they might be willing to contribute some
time to porting your GUI frontend to matplotlib, provided the license
of veusz was compatible with the mpl license.

There are two specific issues you raised in the scipy post you linked
to that I'll take issue with:

  >> In my experience, the plotting code isn't that hard to do.
  >> The   hardest part was making the axes look good.

In my experience, the hardest part of plotting code is supporting all
the ways in which people want to use the code, and that includes
embedding the plot in their GUI of choice, working across platforms,
supporting script based, interactive shell work, application
developers,  web app developers and so on.  There are quite a few
plotting idioms that are mission critical to many developers, and
supporting them all is a complex task.  I'm fond of pointing out the
combinatorial problem -- take every GUI, cross two major versions in
the wild, cross the big-three platforms, cross the standard ways in
which people want to work with their plots and you have a lot of work
to do.  veusz "solves" this problem by restricting choice, which is a
respectable solution.  matplotlib takes the opposite tack and tries to
support the user in the environment in which they want to work.

The second point is

   >> I've done 90% of what's needed there. Basically, I'll be happy
   >> when contouring and images are added.

I tend to disagree that contouring and images are only 10% --  good
contouring, contour labeling, and image support strong enough to
satisfy people for whom images are their lifeblood is hard, and almost
impossible to do efficiently in pure python.  matplotlib isn't there
yet, but the support for both is pretty strong and getting better, and
matplotlib is increasingly being used by astronomers for image display.
 But I see from your web page that you too are an astronomer, so I
expect that you will handle these areas nicely; again, too bad we
couldn't collaborate more. Another tough area to do right of course is
nonlinear transformations (polar, log, mapping projections) with the
associated problems of proper tick locating and labeling...

Cheers,
JDH



From gandalf at geochemsource.com  Fri Apr  8 03:39:01 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Fri, 08 Apr 2005 09:39:01 +0200
Subject: __builtins__ wreidness
Message-ID: <42563515.8080401@geochemsource.com>

Given this module "test.py":

print type(__builtins__)

I ran into a wreid thing.

Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> __builtins__
<module '__builtin__' (built-in)>
 >>> type(__builtins__)
<type 'module'>
 >>> import test
<type 'dict'>
 >>>

What? __builtins__ is a dict when used in a module, but it is a module 
when used interactively? Why?



-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From fred at adventistcare.org  Sat Apr  9 06:36:24 2005
From: fred at adventistcare.org (Sells, Fred)
Date: Sat, 9 Apr 2005 06:36:24 -0400 
Subject: Equivalent string.find method for a list of strings
Message-ID: <777056A4A8F1D21180EF0008C7DF75EE03317438@sunbelt.org>

linenums = [i for i in range(len(lines)) if lines[i].find(searchstring) >=0]

-----Original Message-----
From: Joshua Ginsberg [mailto:listspam at flowtheory.net]
Sent: Friday, April 08, 2005 4:12 PM
To: python-list at mail.python.org
Subject: Re: Equivalent string.find method for a list of strings


try:

filter(lambda x: lines[x].find(searchstring) != -1, range(len(lines)))

That will return a list with the indices of every line containing a hit 
for your search string.

-jag


Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 8, 2005, at 1:52 PM, Jeremy Conlin wrote:

> Joshua Ginsberg wrote:
>
>> Try:
>>
>> filter(lambda x: x.find(searchstring) != -1, lines)
>>
> I really like this option, but what I want to  know where in the file 
> this line exists (i.e. line 42).  Can  I somehow access this line and 
> the lines immediately following?
> Thanks,
> Jeremy
>
-- 
http://mail.python.org/mailman/listinfo/python-list


From none  Wed Apr 27 15:03:55 2005
From: none (Hansan)
Date: Wed, 27 Apr 2005 21:03:55 +0200
Subject: Problem with sending a variable(python) while using html
Message-ID: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>

Hi all.

I am working on a webpage where I use python and html.

When I want to send one variable to a new script/page I use the following 
code:
0) print '''<input type=hidden name="eventid" 
value='''+str(variable_name)+'''>'''

This works fine, the problem occurs when I want to send a variable to a page 
while using a 1)meta refresh or a 2)Href.
1) and 2) works fine as they are but not when I try to send the variable 
with them.

The working version of 1) and 2) could look like
1) print ''<META HTTP-EQUIV="Refresh" CONTENT="0;URL=page xxx">'''
2) print "<a href='page xxx?id=", variable,  "'>", "some text", "</a>"

What I have to do is to combine 0) with 1) so that I can send the variable 
while using a meta refresh
and 0) and 2)

But I no matter how hard I try I cant get it done.

Can any of you experienced users give me some guidance.

I would really appreciate it.

Thanks 




From sunnan at handgranat.org  Fri Apr  1 22:39:53 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sat, 02 Apr 2005 03:39:53 GMT
Subject: Pseudocode in the wikipedia
In-Reply-To: <mailman.1205.1112386538.1799.python-list@python.org>
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>	<d2k70u$70h$1@sea.gmane.org>
	<mailman.1205.1112386538.1799.python-list@python.org>
Message-ID: <duo3e.21053$d5.156170@newsb.telia.net>

James Stroud wrote:
> bob == (carol = 2):
>   if bob = (bob or carol):
>     bob == 4
> 
> But no one could figure out what bob was supposed to equal anyway.

Wouldn't bob equal the boolean result of the expression (carol = 2)?


From prabapython at yahoo.co.in  Sat Apr  9 05:51:16 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Sat, 9 Apr 2005 10:51:16 +0100 (BST)
Subject: change the date string into timestamp
In-Reply-To: 6667
Message-ID: <20050409095116.4371.qmail@web8409.mail.in.yahoo.com>


--- Michael Hoffman <cam.ac.uk at mh391.invalid> wrote:
> praba kar wrote:
> 
> > In Php strtotime() will change a date
> > string into timestamp.  I want to know which 
> > python function will  change a date string
> > into timestamp.
> 
> What do you mean by "a timestamp?"
> -- 
Time stamp means datestring will converted as seconds

example is below

Fri, 8 Apr 2005 09:22:14 +0900 this date value

time stamp is 1112962934


________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From andrea.gavana at agip.it  Fri Apr 29 03:26:40 2005
From: andrea.gavana at agip.it (andrea.gavana at agip.it)
Date: Fri, 29 Apr 2005 09:26:40 +0200
Subject: Webbrowser On Windows
Message-ID: <OF4204A868.C2310605-ONC1256FF2.00288846-C1256FF2.0028EAC1@eni.pri>

Hello NG,

      I am using the webbrowser module (on Windows 2000/XP), and I am
wondering if anyone knows how to use the input arguments "new". On Windows,
it seems to be ignored. By looking at the commands it does on Windows:

class WindowsDefault:
    def open(self, url, new=0, autoraise=1):
        os.startfile(url)

    def open_new(self, url):
        self.open(url)


It seems to me that there is no way to create a new instance of Internet
Explorer (if there are already some IE windows opened).
Does anyone know a possible solution? Or a workaround (without using
startfile, maybe?) that will force IE to create a new instance?

Thank you for every suggestions.

Andrea.

------------------------------------------------------------------------------------------------------------------------------------------
 Message for the recipient only, if received in error, please notify the
sender and read http://www.eni.it/disclaimer/




From Scott.Daniels at Acm.Org  Thu Apr  7 20:40:12 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 07 Apr 2005 17:40:12 -0700
Subject: curious problem with large numbers
In-Reply-To: <mailman.1512.1112915956.1799.python-list@python.org>
References: <723eb693050407124816431b6a@mail.gmail.com>
	<mailman.1512.1112915956.1799.python-list@python.org>
Message-ID: <4255cd93$1@nntp0.pdx.net>

Terry Reedy wrote:
> On my Windows machine with 2.2.1, I get exactly what you expected:
> 
>>>>1e10000
> 1.#INF
> ...
> If you get wrong behavior on a later version, then a bug has been 
> introduced somewhere, even perhaps in VC 7, used for 2.4.

Nope, it is also there for 2.3.4 (May 25 2004, 21:17:02).  This is not
necessarily a bug in the sense of a fixable bug; floating point has
vagaries that are not necessarily easily controllable from the C source
side.

--Scott David Daniels
Scott.Daniels at Acm.Org


From rdm at rcblue.com  Sun Apr 17 04:00:46 2005
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 17 Apr 2005 01:00:46 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <1113545886.372148.82420@z14g2000cwz.googlegroups.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
Message-ID: <6.2.1.2.2.20050417004715.05ada940@rcblue.com>

M.E.Farmer wrote at 23:18 4/14/2005:
> > >Using the GNU "bc" utility:
> > >
> > >   $ bc -l
> > >   bc 1.06
> > >   Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation,
>Inc.
> > >   This is free software with ABSOLUTELY NO WARRANTY.
> > >   For details type `warranty'.
> > >   scale = 3000    # number of output places wanted
> > >   obase = 12      # output base
> > >   print 4 * a(1)  # pi = 4*arctan(1)

Wow! this got me the 3003 (changed from 3000) digits of pi to base 12 in 
60.8 secs. No, I didn't count them yet, nor am I sure they're correct. 
But I'd bet on them..

Could someone remind me how to get the output of bc -l into a text file 
on Windows? (I've tried employing " > pi3003.txt" in various ways) OR, 
how to copy and paste from the command line window, or whatever that 
window is called? (Sorry for the OT question.)

BTW I found a nice set of SCO UNIX man pages at <http://www.rt.com/man/>.

Dick




From danb_83 at yahoo.com  Sun Apr  3 18:58:05 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 3 Apr 2005 15:58:05 -0700
Subject: string goes away
References: <mailman.1156.1112322721.1799.python-list@python.org>
	<Xns962B5D9DAB99Eduncanrcpcouk@127.0.0.1>
	<87d5tcouct.fsf@pobox.com>
Message-ID: <1112569085.884702.165410@o13g2000cwo.googlegroups.com>

John J. Lee wrote:
> Duncan Booth <duncan.booth at invalid.invalid> writes:
> [...]
> >    str.join(sep, list_of_str)
> [...]
>
> Doesn't work with unicode, IIRC.

>>> u" ".join(["What's", "the", "problem?"])
u"What's the problem?"



From roy at panix.com  Tue Apr 19 10:50:19 2005
From: roy at panix.com (Roy Smith)
Date: 19 Apr 2005 10:50:19 -0400
Subject: Why does python class have not private methods? Will this never
 changed?
References: <311b5ce105041902165a0969a0@mail.gmail.com>
	<mailman.2091.1113911481.1799.python-list@python.org>
	<roy-1F0B84.08183019042005@reader1.panix.com>
	<ELednQVBIIDbmvjfRVn-1A@powergate.ca>
Message-ID: <d435rb$9ei$1@panix2.panix.com>

In article <ELednQVBIIDbmvjfRVn-1A at powergate.ca>,
Peter Hansen  <peter at engcorp.com> wrote:
>Roy Smith wrote:
>>  Simon Brunning <simon.brunning at gmail.com> wrote:
>>>On 4/19/05, could ildg <could.net at gmail.com> wrote:
>>>>Private stuff always makes programming much easier.
>>>
>>>That contention is, at best, debatable. See
>>>http://groups-beta.google.com/group/comp.lang.python/msg/b977ed1312e10b21.
>> 
>> Nice essay.  Now, for another look at the same issue...
>> http://thedailywtf.com/forums/32534/ShowPost.aspx
>
>Where in the original posting or in the 86 replies
>in that massive page are we supposed to find something
>pointed about this issue?

There are several comments in there speculating that the intent was to
find a way around private data hiding.  It's a WTF -- you can't take
it too seriously.



From nospam at nospam.com  Mon Apr  4 18:54:37 2005
From: nospam at nospam.com (3c273)
Date: Mon, 4 Apr 2005 15:54:37 -0700
Subject: Insert database rows from CSV file
References: <d2sb9901nlr@enews3.newsguy.com>
	<CuSdndFAEfVYIczfRVn-iw@comcast.com>
Message-ID: <d2sgje01vc1@enews3.newsguy.com>

Thanks for the link, but this is the step I am trying to save (for someone
else). Every time he goes to run a report, he must stop and import any new
csv files. Since the files are generated by a Python script, I thought I
could just insert them into his table and save him some steps. I'm also just
trying to learn the basics Python and SQL . Thanks again.
Louis

"Larry Bates" <lbates at syscononline.com> wrote in message
news:CuSdndFAEfVYIczfRVn-iw at comcast.com...
> You may want to take a look at this link.  It should
> be much faster than any programmatic technique.
>
> http://www.its.niu.edu/its/CSupport/tipoftheweek/tip_080502.shtml
>
> If you still want to do it programmatically, you will need to
> look at csv module to parse the lines.
>
> Larry Bates
>
>
>
> 3c273 wrote:
> > Hello,
> > I have a really simple Access database table with a format similar to
this:
> > CustomerName - ProductOrdered - QtyOrdered
> >
> > I have a CSV file with the appropriate values as follows:
> > Customer1, Widget1, 1000
> > Customer2, Widget2, 3000
> > etc
> >
> > I have figured out how to insert the data manually from the interactive
> > prompt:
> > cursor.execute(""" INSERT INTO "Table1" Values ('Customer1', "Widget1',
> > '1000') """)
> >
> > What I would like to do is iterate over the CSV file like this:
> > for lines in file:
> >     cursor.execute(""" INSERT INTO "Table1" lines """)
> >
> > I have googled and found some examples that use string formatting, but
> > without documentation I can't seem to find the right formula. I don't
have
> > any problem with the iteration part, I just can't seem to figure out how
to
> > use a variable to insert an entire row with the INSERT statement. Can
anyone
> > get me going in the right direction? I'm using odbc from win32all,
> > Python2.3, and Access2000 if it matters. Thanks.
> > Louis
> >
> >




From simon.brunning at gmail.com  Fri Apr 15 08:28:59 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 15 Apr 2005 13:28:59 +0100
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
Message-ID: <8c7f10c605041505281f9f4414@mail.gmail.com>

On 4/15/05, Graham <gsmith at oxfam.org.uk> wrote:
> I need a SQL Server or ODBC package for Python.  Can anyone help please?
> Have search the Python packages under Database and there is no reference to
> either SQL Server or ODBC.

Top of the line is probably mxODBC
(<http://www.egenix.com/files/python/mxODBC.html>). It's the Rolls
Royce of DB-API modules. It's not free for commercial use, but it's
worth every penny/cent/groat/whatever.

For commercial work where I've not been able to justify spending money
(in my bosses opinion at least), adodbapi
(<http://adodbapi.sourceforge.net/>) works a treat.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From rbt at athop1.ath.vt.edu  Mon Apr 25 10:32:11 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 25 Apr 2005 10:32:11 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
Message-ID: <d4iv1b$mfn$1@solaris.cc.vt.edu>

Christos TZOTZIOY Georgiou wrote:
> On Mon, 25 Apr 2005 09:23:43 -0400, rumours say that rbt
> <rbt at athop1.ath.vt.edu> might have written:
> 
> 
>>Are there any plans in the near future to support PDF files in Python as 
>>   thoroughly and completely as Perl does?
> 
> 
> Before we let you know about our plans, what are *your* plans on this
> subject? :) [0]

I just want to read PDF files in a portable way (windows, linux, mac) 
from within Python.

> 
> 
>>http://cpan.uwinnipeg.ca/search?query=pdf&mode=dist
> 
> 
>>I love Python's clean syntax and ease of use, etc. But on some things 
>>(PDF for example) as barbaric as Perl's syntax is, it does outshine 
>>Python... I hate having to use Perl just to deal with PDF files.
> 
> 
> There are two issues here: a) a language, b) its library.  You imply
> that the Perl syntax outshines Python's because it has _more thorough
> and complete support for PDF_, as you say.  I don't see a connection,
> but rather I see a lure to provoke answers

I do not seek to provoke. Sorry if my question comes across that way to you.


From fredrik at pythonware.com  Fri Apr  8 17:03:24 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 23:03:24 +0200
Subject: Registering File Extension?!?
References: <4200063400024066@ims9c.cp.tin.it>
Message-ID: <d36re6$727$1@sea.gmane.org>

<andrea_gavana at tin.it> wrote:

>  probably this question has been asked before, but I am unable to find
> an answer... I have a big application (written in Python + a GUI in wxPython)
> which allows the user to save its work in a file with an extension .glb.
> Does anyone know if is there a way (on Windows, but also on other platforms
< if possible, thought I know almost nothing about Unix/Linux/Mac things)
> to automatically register the extension .glb so that when the user double-clicks
> the project file my application is launched with the project file name as
> a first argument?

briefly, register an "extension => progid" mapping under

    HKEY_CLASSES_ROOT/extension

and a "program identity => command" mapping under

    HKEY_CLASSES_ROOT/progid/shell/open/command

under HKEY_CLASSES_ROOT

(use regedit to see how it's done for other applications)

for more info, see

http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_extending/extending.asp

</F> 





From bill.mill at gmail.com  Tue Apr 12 08:41:15 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Tue, 12 Apr 2005 08:41:15 -0400
Subject: some sort of permutations...
In-Reply-To: <d3fq51$iho$1@sea.gmane.org>
References: <9468aec7.0504112228.5d018278@posting.google.com>
	<d3fq51$iho$1@sea.gmane.org>
Message-ID: <797fe3d405041205413e96df2d@mail.gmail.com>

On Apr 12, 2005 2:37 AM, Fredrik Lundh <fredrik at pythonware.com> wrote:
> "Bernard A." wrote:
> 
> > i'm looking for a way to have all possible length fixed n-uples from a
> > list, i think generators can help, but was not able to do it myself,
> > maybe some one could point me out to an idea to do it ?
> 
> did you try googling for "python permutations" ?
> 
> here's the first hit:
> 
>     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465
> 

I've used that recipe a significant amount, and I feel like its
recursion really slows it down (but I haven't been profiled it). Does
anyone know of a non-recursive algorithm to do the same thing?

And, while I'm asking that question, is there a good reference for
finding such algorithms? Do most people keep an algorithms book handy?

Peace
Bill Mill
bill.mill at gmail.com


From sxanth at cs.teiath.gr  Sat Apr  2 05:10:29 2005
From: sxanth at cs.teiath.gr (stelios xanthakis)
Date: Sat, 02 Apr 2005 13:10:29 +0300
Subject: Looking for Benchmarklets to improve pyvm
In-Reply-To: <mailman.1219.1112402951.1799.python-list@python.org>
References: <424D5BD0.10601@cs.teiath.gr>
	<mailman.1219.1112402951.1799.python-list@python.org>
Message-ID: <424E6F95.3090607@cs.teiath.gr>

Skip Montanaro wrote:

> 
> Take a look around for Marc Andre Lemburg's pybench suite. 
> 

Thanks!  Although pybench needs module.re and module.pickle,
so I'll post results later.  Moreover, I have similar tests.
I'd prefer scripts that do *real* calculations.

Stelios


From newsgroups at jhrothjr.com  Fri Apr  1 08:37:35 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 1 Apr 2005 07:37:35 -0600
Subject: Ternary Operator in Python
References: <mailman.1172.1112340286.1799.python-list@python.org>
Message-ID: <114qjnjg54nnkd3@news.supernews.com>


"praba kar" <prabapython at yahoo.co.in> wrote in message 
news:mailman.1172.1112340286.1799.python-list at python.org...
> Dear All,
>    I am new to Python.  I want to know how to
> work with ternary operator in Python.  I cannot
> find any ternary operator in Python.  So Kindly
> clear my doubt regarding this

There isn't one, and there won't be one unless Guido
changes his mind, and that's quite unlikely.

There are a number of workarounds; the most
used one seems to be based on a feature of the
'and' and 'or' operators. I believe Pep 308 has
a summary of the different ways you can do it,
and the advantages and drawbacks of each.

John Roth
>
>
>
> __________________________________
> Yahoo! Messenger
> Show us what our next emoticon should look like. Join the fun.
> http://www.advision.webevents.yahoo.com/emoticontest 



From hancock at anansispaceworks.com  Mon Apr 25 21:37:20 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Mon, 25 Apr 2005 20:37:20 -0500
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <4269FCB8.5010402@mage.hu>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<42698692$1@nntp0.pdx.net> <4269FCB8.5010402@mage.hu>
Message-ID: <200504252037.20911.hancock@anansispaceworks.com>

On Saturday 23 April 2005 02:43 am, Mage wrote:
> Scott David Daniels wrote:
> > See, the body of your anonymous function just looks for "the current
> > value of n" when it is _invoked_, not when it is _defined_.
> 
> The "lambda functions" was an unclear part of the tutorial I read.
> Should I use them? Are they pythonic?
> As far I see they are good only for type less a bit.

Lambda has two main uses, IMHO:

1) You need to create a whole lot of functions which all follow a certain
pattern, but must evaluate "late" (i.e. the arguments will be added later,
so you can't just compute the result instead). This is basically the 
case the OP presented with his list of increasing powers.  You can, of
course, use named functions for each, but it may become impractical.

2) You are going to apply the same (arbitrary) function to many sets of arguments.
This argues for taking a function as an argument.  Python Imaging Library
does this with the 'point' method, for example.

Frequently you will run into a trivial case such as:

def squared_plus_one(x):
     return x**2 + 1

result_ob = source_ob(transform=squared_plus_one)

or something like that.  It gets pretty silly to clutter up your code with such
trivial functions, and lambda gives you a neat way to simply define the function
for the moment you need it and throw it away:

result_ob = source_ob(transform=lambda x: x**2 + 1)

Note that in this case, the expression is probably the clearest way to document
the function (clearer than the function name, IMHO).

So, yeah, they have some real uses.  But you can live without them most
of the time.

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From exarkun at divmod.com  Thu Apr 28 20:56:27 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Fri, 29 Apr 2005 00:56:27 GMT
Subject: Shutting down twisted reacotr
In-Reply-To: <d4ql8o$c6m$1@news-int2.gatech.edu>
Message-ID: <20050429005627.15422.842044080.divmod.quotient.6632@ohm>

On Thu, 28 Apr 2005 12:34:33 +0000 (UTC), Operation Latte Thunder <chris at angband.org> wrote:
>Jason  Mobarak <jason.mobarak at gmail.com> wrote:
>> Why do you want to do this in a thread? What's wrong with
>> reactor.callLater?
>>
>> import time
>> from twisted.internet import reactor
>>
>> def shutdown():
>>
>>    time.sleep(3)
>>    print "stopping"
>>    reactor.callFromThread(reactor.stop)
>>
>> reactor.callInThread(shutdown)
>> reactor.run()
>
>In the app I am playing with, I have a thread that reads from the console.
>When it terminates, I wanted it to shut down the reactor and couldn't use
>callLater.  However, callFromThread worked perfectly.   I guess I need to
>look at the docs some more to understand why its necessary

  In general, you cannot call Twisted APIs from a thread other than that in which the reactor is executing.  There are a few exceptions, callFromThread being one of them, but in general doing so has unpredictable behavior and is not supported.

  You also may be interested in twisted.internet.stdio and, in Twisted 2.0, twisted.conch.insults.

  Jp


From mwm at mired.org  Tue Apr 26 22:33:52 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 21:33:52 -0500
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
	<01os61t4vg97o4seimge9sppqf9shj7pns@4ax.com>
Message-ID: <86mzrlkkxb.fsf@guru.mired.org>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> On 26 Apr 2005 03:40:16 -0700, "ajikoe at gmail.com" <ajikoe at gmail.com>
> declaimed the following in comp.lang.python:
>
>> Hello Mike,
>> I have to know this topic otherwise my program has to check whether the
>> file / files are already deleted and this is a little bit messy.
>>
> 	Ah, but this requirement is different from the one you
> originally asked.
>
> 	In either event, the best solution is probably to wrap the call
> with a try block...
>
> 	try:
> 		os.remove(fileName)
> 	except <need to determine what errors can be raised>:
> 		# do whatever you need for the error
> 	except <other error>:
> 		# do whatever this error needs...
>
> 	If the error is that the file didn't exist to be deleted, you
> can probably use a "pass" as the except processing.

This is just a little bit tricky. os.remove (on FreeBSD 5-STABLE,
anyway) throws an OSError exception if it doesn't have permission to
remove the file, *or* if the file doesn't exist. You have to examine
the exception for it's value, which is the result of a strerror
call. I believe that the result of strerror is platform dependent.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From mefjr75 at hotmail.com  Thu Apr 21 00:55:01 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 20 Apr 2005 21:55:01 -0700
Subject: Python instances
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
Message-ID: <1114059301.558816.155630@z14g2000cwz.googlegroups.com>

henrikpierrou at hotmail.com wrote:
> Hi,
>
> How do python instances work?
> Why does the code at the end of my posting produce this output:
>
> list in a:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
> list in b:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>
> instead of
>
> list in a:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
> list in b:
> []
>
> ----------------------------
>
> class MyClass:
>     list = []
>
>     def add(self, x):
>         self.list.append(x)
>
>     def printer(self):
>         print self.list
>
> a = MyClass()
> b = MyClass()
>
> for n in range(10):
>     a.add(n)
>
> print "list in a:"
> a.printer()
> print "list in b:"
> b.printer()
>
> /H
As others have noted, you are using a class name and not an instance
name.
Class names are shared by all instances.Instance names are not shared.
Also this next bit can bite you.
Don't use list it is builtin name and can cause problems when you
rebind it.
Others to avoid are keywords and file, dict, tuple, object, etc...
They can be tempting to use, resist, it will save you debug time later.
hth,
M.E.Farmer



From kay.schluehr at gmx.net  Fri Apr  1 03:17:17 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 1 Apr 2005 00:17:17 -0800
Subject: Our Luxurious, Rubinesque, Python 2.4
In-Reply-To: <1112320986.513473.79510@g14g2000cwa.googlegroups.com>
References: <1112320986.513473.79510@g14g2000cwa.googlegroups.com>
Message-ID: <1112343437.396733.300400@f14g2000cwb.googlegroups.com>

Larry Hastings wrote:

> Also, how much would I be
> able to trim away if I recompiled it myself?  Is a lot of it native
> implementations of Python libraries that I might not care about
> including, or is it all fundamental VM stuff that couldn't possibly
be
> removed?

In Pythons config.c file You can determine which ext-modules will be
compiled into the core. I estimate that a lean core would have a size
around ~600kb. Trimming down further may become hard because You may
have to decide what to sacrifice: tuples, classes or objects ;)

Regards,
Kay



From xah at xahlee.org  Mon Apr 25 14:48:04 2005
From: xah at xahlee.org (Xah Lee)
Date: 25 Apr 2005 11:48:04 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <mailman.1813.1113355346.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
Message-ID: <1114454884.549187.122440@o13g2000cwo.googlegroups.com>

I have produced my doc.
( http://xahlee.org/perl-python/python_re-write/lib/module-re.html )

isn't there a hundred dollars due to me?

 Xah
 xah at xahlee.org
? http://xahlee.org/PageTwo_dir/more.html


Steve Holden wrote:
> Xah Lee wrote:
> [mountains of irrelevant drivel which normal people would boil down
to
> "I don't understand the doicumentation]. Even then, I'd still be on
the
> side of the documentation.
>
> > The answer to the questions are resounding yeses, you fucking
asses.
> >
> > paypal me a hundred dollars and i'll rewrite the whole re doc in a
few
> > hours.
> >
> I will personally pay you a hundred dollars if you can find enough
time
> between now and this time next week - you should be able to find "a
few
> hours" in 168 without unduly conveniencing yourself.
>
> The condition for winning the prize is that at least five regular
> posters to c.l.py have to mail me and saythey think your version is
better.
>
> If no such document gets produced, we must assume you are too busy?
>
> > Fuck you the standard IT morons. Excuse me for i didn't have time
to
> > write a more coherent and detailed analysis of the stupidities of
the
> > re doc.
>
> I have learned not to expect coherent and detailed analysis, so I
have
> managed to contain my disappointment.
>
> non-standard-moronical-ly y'rs  - steve
> --
> Steve Holden        +1 703 861 4237  +1 800 494 3119
> Holden Web LLC             http://www.holdenweb.com/
> Python Web Programming  http://pydish.holdenweb.com/



From max2 at fisso.casa  Sun Apr 10 06:57:24 2005
From: max2 at fisso.casa (max(01)*)
Date: Sun, 10 Apr 2005 10:57:24 GMT
Subject: very simple tkinter demo program
In-Reply-To: <9NidnQVTQ9LKMMXfRVn-tQ@adelphia.com>
References: <aQX5e.1205416$35.44366592@news4.tin.it>
	<9NidnQVTQ9LKMMXfRVn-tQ@adelphia.com>
Message-ID: <oE76e.1206995$35.44444963@news4.tin.it>

Samantha wrote:
> I can not get it to run.
> S

sorry about that. baybe it is a conflict between tabstop width in my 
editor and in my newsreader.

i substituted tabs with spaces and i hope now you can run it.

bye

macs

----cuthere----

from Tkinter import *

class MiaApp:
   def __init__(self, genitore):

     self.MioGenitore = genitore

     fonte = ("Helvetica", "12")

     self.campi = ["Cognome", "Nome" , "Data di nascita"]

     quadro_grande = Frame(genitore)
     quadro_grande.pack(expand = YES, fill = BOTH)

     quadro_menu = Frame(quadro_grande)
     quadro_menu.configure(
       bd = 1,
       relief = RAISED
       )
     quadro_menu.pack(side = TOP, fill = X)

     pm_file = Menubutton(quadro_menu)
     pm_file.configure(text = "File")
     pm_file.pack(side = LEFT)

     m_file = Menu(pm_file)
     pm_file.configure(menu = m_file)
     m_file.configure(tearoff = NO)
     m_file.add_command(
       label = "Scrivi",
       command = self.premuto_scrivi
       )
     m_file.add_command(
       label = "Leggi",
       command = self.premuto_leggi
       )
     m_file.add_separator()
     m_file.add_command(
       label = "Chiudi",
       command = genitore.destroy
       )

     pm_mod = Menubutton(quadro_menu)
     pm_mod.configure(text = "Modifica")
     pm_mod.pack(side = LEFT)

     pm_aiuto = Menubutton(quadro_menu)
     pm_aiuto.configure(text = "?")
     pm_aiuto.pack(side = RIGHT)

     msg = Label(quadro_grande)
     msg.configure(
       font = fonte,
       relief = RIDGE,
       wraplength = "10c",
       justify = LEFT,
       text = u"Questo \u00E8 un programma in Python \
che trae ispirazione da un analogo lavoro del collega \
G. Renda. Il programma originale era scritto \
in linguaggio Java, e sfruttava le librerie JFC \
(\u00ABJava Foundation Class\u00BB, dette anche \
\u00ABSwing\u00BB); questo invece usa le librerie Tk, \
mediante il modulo Tkinter."
       )
     msg.pack(
       side = TOP,
       padx = "2m",
       pady = "2m"
       )

     quadro_pulsanti = Frame(quadro_grande)
     quadro_pulsanti.pack(
       side = BOTTOM,
       fill = X,
       padx = "2m",
       pady = "2m"
       )

     scrivi = Button(quadro_pulsanti)
     scrivi.configure(
       text = "Scrivi",
       command = self.premuto_scrivi
       )
     scrivi.pack(side = LEFT, expand = YES)

     leggi = Button(quadro_pulsanti)
     leggi.configure(text = "Leggi", command = self.premuto_leggi)
     leggi.pack(side = LEFT, expand = YES)

     chiudi = Button(quadro_pulsanti)
     chiudi.configure(text = "Chiudi", command = genitore.destroy)
     chiudi.pack(side = LEFT, expand = YES)

   def premuto_scrivi(self):
     InserimentoRecord()

   def premuto_leggi(self):
     ConsultazioneRecord()

class InserimentoRecord(Toplevel):
   def __init__(self):

     Toplevel.__init__(self)

     self.titolo = "Inserimento"
     self.wm_title(self.titolo)

     quadro_grande = Frame(self)
     quadro_grande.pack(expand = YES, fill = BOTH)

     self.quadro_pulsanti = Frame(quadro_grande)
     self.quadro_pulsanti.pack(
       side = BOTTOM,
       fill = X,
       padx = "2m",
       pady = "2m"
       )

     quadri_ing = []
     self.n = len(miaApp.campi)
     self.var = []
     eti = []
     larg_eti = max(map(len, miaApp.campi))
     ing = []
     for i in range(self.n):
       quadri_ing.append(None)
       self.var.append(None)
       ing.append(None)
       eti.append(None)
       quadri_ing[i] = Frame(quadro_grande)
       quadri_ing[i].pack(side = TOP, expand = YES, fill = BOTH)
       self.var[i] = StringVar()
       eti[i] = Label(quadri_ing[i])
       eti[i].configure(
         text = miaApp.campi[i] + ": ",
         width = larg_eti,
         anchor = E
         )
       eti[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
       ing[i] = Entry(quadri_ing[i], textvariable = self.var[i])
       ing[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)

     self.salva = Button(self.quadro_pulsanti)
     self.salva.configure(
       text = "Salva",
       command = self.premuto_salva
       )
     self.salva.pack(side = LEFT, expand = YES)

     self.annulla = Button(self.quadro_pulsanti)
     self.annulla.configure(
       text = "Annulla",
       command = self.premuto_annulla
       )
     self.annulla.pack(side = LEFT, expand = YES)

   def premuto_salva(self):
     import tkFileDialog
     import pickle

     dati = []
     for i in range(self.n):
       dati.append(None)
       dati[i] = self.var[i].get()

     nomefile = tkFileDialog.asksaveasfilename(
       defaultextension = ".ana",
       filetypes = [
         ("Record anagrafici", "*.ana"),
         ("Tutti i file", "*")
         ]
       )

     if nomefile:
       f = open(nomefile, "w")
       pickle.dump(dati, f)
       f.close()

     self.destroy()

   def premuto_annulla(self):
     self.destroy()

class ConsultazioneRecord(Toplevel):
   def __init__(self):

     import tkFileDialog

     nomefile = tkFileDialog.askopenfilename(
       defaultextension = ".ana",
       filetypes = [
         ("Record anagrafici", "*.ana"),
         ("Tutti i file", "*")
         ]
       )

     if nomefile:

       try:  ### Il metodo 'pickle.load' potrebbe generare una
             ### eccezione se l'utente cerca di aprire un file
             ### non del formato giusto

         Toplevel.__init__(self)

         self.titolo = "Consultazione"
         self.wm_title(self.titolo)

         quadro_grande = Frame(self)
         quadro_grande.pack(expand = YES, fill = BOTH)

         eti_rec = Label(quadro_grande)
         eti_rec.configure(
           text = "Record: " + nomefile,
           relief = RIDGE
           )
         eti_rec.pack(
           side = TOP,
           fill = X,
           padx = "5m",
           pady = "5m"
           )

         self.quadro_pulsanti = Frame(quadro_grande)
         self.quadro_pulsanti.pack(
           side = BOTTOM,
           fill = X,
           padx = "2m",
           pady = "2m"
           )

         import pickle

         quadri_eti = []
         eti_campi = []
         eti_val = []
         larg_eti_campi = max(map(len, miaApp.campi))
         f = open(nomefile, "r")

         valori = pickle.load(f)  ### Potrebbe generare una
                                  ### eccezione 'KeyError'

         larg_eti_val = max(map(len, valori))
         n = len(miaApp.campi)
         for i in range(n):
           quadri_eti.append(None)
           eti_campi.append(None)
           eti_val.append(None)
           quadri_eti[i] = Frame(quadro_grande)
           quadri_eti[i].pack(side = TOP, expand = YES, fill = BOTH)
           eti_campi[i] = Label(
             quadri_eti[i],
             text = miaApp.campi[i] + ": ",
             width = larg_eti_campi,
             anchor = E
             )
           eti_campi[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
           eti_val[i] = Label(
             quadri_eti[i],
             text = valori[i],
             anchor = W,
             width = larg_eti_val,
             relief = SUNKEN
             )
           eti_val[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
         self.chiudi = Button(self.quadro_pulsanti)
         self.chiudi.configure(
           text = "Chiudi",
           command = self.premuto_chiudi
           )
         self.chiudi.pack(side = LEFT, expand = YES)

       except KeyError:  ### Eventualmente generato da
                         ### 'pickle.load()'

         import tkMessageBox

         tkMessageBox.showwarning(
           "Bad input",
           "Illegal values, please try again"
           )
         self.destroy()

       f.close()

   def premuto_chiudi(self):
     self.destroy()

radice = Tk()
radice.wm_title("Versione Python di un programma Java di G. Renda")
radice.wm_iconname("giuseppe")
radice.minsize(400, 300)
miaApp = MiaApp(radice)
radice.mainloop()


From timr at probo.com  Fri Apr  1 03:00:58 2005
From: timr at probo.com (Tim Roberts)
Date: Fri, 01 Apr 2005 00:00:58 -0800
Subject: urllib problem (maybe bugs?)
References: <mailman.1076.1112196965.1799.python-list@python.org>
Message-ID: <jkvp41psv1mbn03804022singqvr5bd63g@4ax.com>

Timothy Wu <2huggie at gmail.com> wrote:
>
>I'm trying to fill the form on page
>http://www.cbs.dtu.dk/services/TMHMM/ using urllib.
>
>There are two peculiarities. First of all, I am filling in incorrect
>key/value pairs in the parameters on purpose because that's the only
>way I can get it to work.. For "version" I am suppose to leave it
>unchecked, having value of empty string. And for name "outform" I am
>suppose to assign it a value of "-short". Instead, I left out
>"outform" all together and fill in "-short" for version. I discovered
>the method my accident.
>
>After I've done that it works fine for small SEQ values. Then, when I
>try to send large amount of data (1.4MB), it fails miserably with
>AttributeError exception.
>
>I highly suspect the two problems I have are the result of some bugs
>in the urllib module. Any suggestions?

The <form> on that page wants multipart/form-data encoding, where each
parameter is embedded in a separate MIME section.  That is common with very
large data, and is _required_ when the form includes a file upload.  urllib
doesn't do that.  It always sends plain old
application/x-www-form-urlencoded data.

I think you're going to have to roll your own sender.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From http  Thu Apr 21 23:12:40 2005
From: http (Paul Rubin)
Date: 21 Apr 2005 20:12:40 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
Message-ID: <7xk6mvh5cn.fsf@ruckus.brouhaha.com>

bokr at oz.net (Bengt Richter) writes:

> I would try right-clicking the shortcut icon and selecting
> properties, then select the shortcut tab and edit the target string
> with s/python/pythonw/ and then click ok.
> 
> Then try double clicking the shortcut icon again.  If that does it,
> you're home ;-) If not, post more symptoms.

Hmm, I clicked properties and the word python doesn't appear in the
shortcut string.  The shortcut string simply points to the .py file.
I think Windows knows to run Python because of some registry entry
that maps the .py extension to python.exe.  I don't know which entry
and changing it sounds a little bit dangerous.

I did see that I could select a button launch the dos box minimized,
so it doesn't clutter up the screen.  That mostly solves the immediate
problem.  A more complete solution (eliminate dos box altogether)
would be nice, but I can live with an auto-minimized box.

Thanks.


From roy at panix.com  Mon Apr 11 09:03:34 2005
From: roy at panix.com (Roy Smith)
Date: Mon, 11 Apr 2005 09:03:34 -0400
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
Message-ID: <roy-8590D3.09033311042005@reader1.panix.com>

In article <1113197530.990898.46130 at z14g2000cwz.googlegroups.com>,
 "ajikoe at gmail.com" <ajikoe at gmail.com> wrote:

> Hello I need to build table which need searching data which needs more
> power then dictionary or list in python, can anyone help me what kind
> of database suitable for python light and easy to learn. Is mySQL a
> nice start with python ?
> 
> Sincerely Yours,
> Pujo

MySQL lacks some of the more advanced features of commercial SQL databases 
like Oracle or Sybase, but other than that, it's an excellent and very 
popular choice.

It's free, easy to install, runs on many platforms and has interfaces to 
many languages (including Python).  It's also been around a long time and 
used on many large-scale projects, so you can have confidence that it's 
stable.  It's also well documented, both with on-line material from the 
makers, and from third party publishers (I like the O'Reily book).


From jorgen.cederberg at gmail.com  Tue Apr 19 09:46:45 2005
From: jorgen.cederberg at gmail.com (=?ISO-8859-1?Q?J=F8rgen_Cederberg?=)
Date: Tue, 19 Apr 2005 15:46:45 +0200
Subject: Update Label when Scale value changes
In-Reply-To: <1113916746.841747.274550@l41g2000cwc.googlegroups.com>
References: <1113916746.841747.274550@l41g2000cwc.googlegroups.com>
Message-ID: <9Z79e.969$cL6.77@news.get2net.dk>

codecraig wrote:

> Hi,
>   I am using Tkinter and I have a Label and a Scale.  I want to update
> my label everytime the Scale value changes.  What is the best way of
> doing this?  Do i have to bind for every event type?  Or is there some
> better way?  If I do have to bind each type of event to the scale, what
> types occur for a Scale?
> 
> Thanks.
> 

Hi

you could use a variable. Below is simple program that connects the value of the scale to 
the label.


from Tkinter import *

root = Tk()

var = IntVar()
Label(root, textvariable=var).pack()
Scale(root, from_=-2.0, to=10.0, variable=var).pack()

root.mainloop()

Hope this helps
Jorgen Cederberg


From kay.schluehr at gmx.net  Sun Apr 10 04:20:54 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Apr 2005 01:20:54 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1603.1113027761.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com>
	<mailman.1603.1113027761.1799.python-list@python.org>
Message-ID: <1113121254.874488.111250@f14g2000cwb.googlegroups.com>

Steve Holden wrote:

> You are correct in suggesting that the library could be better
organized
> than it is, but I felt we would be better off deferring such change
> until the emergence of Python 3.0, which is allowed to break
backwards
> compatibility. So, start working on your scheme now - PEP 3000 needs
> contributions.

I fear that Python 3.0 becomes some kind of vaporware in the Python
community that paralyzes all redesign efforts on the std-lib. The
argument goes like this: one has to wait until the BDFL has made his
syntax/feature/builtin decisions. It is not usefull to redesign a
std-library of a language that becomes somehow deprecated - but the
BDFL thinks that Python 3.0 is still py-in-the-sky. PEP 3000 seems to
be nothing more than a summary of the BDFLs musings about Python warts
and some wishfull but highly controversial features like type guards
that would have a great overall impact on the std-lib. 

Regards,
Kay



From jfine at pytex.org  Wed Apr 13 14:34:41 2005
From: jfine at pytex.org (Jonathan Fine)
Date: Wed, 13 Apr 2005 19:34:41 +0100
Subject: Simple Python + Tk text editor
Message-ID: <425D6641.5050906@pytex.org>

Hi

I'm looking for a simple Python + Tk text editor.

I want it as a building block/starting point.

I need basic functions only:
   open a file, save a file, new file etc.

It has to be open source.

Anyone know of a candidate?

-- 
Jonathan
http://qatex.sourceforge.org



From bvande at po-box.mcgill.ca  Sun Apr 17 17:11:00 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sun, 17 Apr 2005 17:11:00 -0400
Subject: pydoc preference for triple double over triple single quotes--
 anyreason?
In-Reply-To: <4262c00e$1_3@newspeer2.tds.net>
References: <mailman.2008.1113679688.1799.python-list@python.org>
	<42617449_3@newspeer2.tds.net>
	<mailman.2030.1113757909.1799.python-list@python.org>
	<4262c00e$1_3@newspeer2.tds.net>
Message-ID: <4262D0E4.6090206@po-box.mcgill.ca>

Kent Johnson said unto the world upon 2005-04-17 16:17:
> Brian van den Broek wrote:
> 
>> Kent Johnson said unto the world upon 2005-04-16 16:41:
>>
>>> Brian van den Broek wrote:
>>>
>>>> I've just spent a frustrating bit of time figuring out why pydoc 
>>>> didn't extract a description from my module docstrings. Even though 
>>>> I had a well formed docstring (one line, followed by a blank line, 
>>>> followed by the rest of the docstring), when I ran Module docs, my 
>>>> modules showed up as having "no description". ("Module docs" 
>>>> referring to the shortcut installed on Windows that launches the 
>>>> pydoc server.)
>>>
>>>
>>> ?? It works for me with triple-single quoted strings...from a quick 
>>> look it appears that pydoc uses inspect which looks at the __doc__ 
>>> attribute; do your modules have __doc__ attributes?
>>>
>> Kent, that's odd. My module does have a valid docstring and hence a 
>> __doc__ attribute (I did explicitly check). help(my_module) works fine 
>> at the prompt. It is just the results list in the TKinter interface to 
>> the pydoc server application that doesn't seem to pick up my module's 
>> description (in the first line of its docstring) when the docstring is 
>> triple-single quoted.
> 
> 
> I'm not sure what you mean by "the results list in the TKinter interface 
> to the pydoc server". I ran the server, clicked "open browser" and 
> browsed to a module in site-packages; that worked fine for me under 
> Win2K and Python 2.4.1.
> 
> Kent

By "the TKinter interface to the pydoc server" I mean the window that 
pops up when you select the Module Docs shortcut. It is pictured here 
  <http://www.onlamp.com/python/2001/04/18/graphics/pydoc1.gif>, which 
is Fig.1 in an article on pydoc by Cameron Laird 
<http://www.onlamp.com/pub/a/python/2001/04/18/pydoc.html>. By 
"results list" I mean the gray-backround'ed box immediately below the 
"Search for" input box in the illustration.

The puzzle for me was that if I enter my module name in the "Search 
for" box, it shows up in the list of results, as expected. But whether 
the results list entry for my module incorporates the description form 
my module's docstring or instead shows my module as having "(no 
description)" is a function of which style of triple quotes I used. 
(If my module docstring is enclosed by triple double quotes, the 
description is extracted from my module's docstring. If it uses triple 
single quotes instead, for purposes of the results list my module's 
docstring is ignored, and the module is listed as having "(no 
description)".)

At any rate, such was the (minor) irritation which caused me to launch 
the thread. It took me a bit to work out that the quote-style was what 
made the difference, and a preliminary google didn't cast light. 
2/3rd's the point of the post was to make the problem resolvable by 
google.

Thanks for your continued efforts to understand what I'm on about. :-)

Best to all,

Brian vdB




From __peter__ at web.de  Fri Apr 15 11:33:20 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 15 Apr 2005 17:33:20 +0200
Subject: eval function not working how i want it dag namn
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
Message-ID: <d3omrn$cq8$02$1@news.t-online.com>

robcarlton wrote:

> hi everybody
> I've written this function to make a list of all of an objects
> attributes and methods (not for any reason, I'm just learning)
> 
> def list_members(obj)
>     l = dir(obj)
>     return map(lambda x : eval('obj.'+x), l)
> 
> but I get an error saying that obj isn't defined. As I understand it
> eval has access to the current local namespace, which does contain
> object, so I'm not sure whats going wrong.
> 
> ps Im sure there are better ways of doing the above which doesn't call
> the eval function, and while I'd be glad to know what it is, I'd still
> like to understand why my way isnt working

It would work if obj were in the local namespace like so:

>>> def f(obj="x"):
...     return eval("obj")
...
>>> f()
'x'

but with the lambda you are introducing a nested namespace.

>>> def f(obj="x"):
...     return (lambda: eval("obj"))()
...
>>> f()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 2, in f
  File "<stdin>", line 2, in <lambda>
  File "<string>", line 0, in ?
NameError: name 'obj' is not defined

You are doing the equivalent to

>>> def f(obj="x"):
...     def g(): # no obj in g()'s namespace
...             return eval("obj")
...     return g()
...
>>> f()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 4, in f
  File "<stdin>", line 3, in g
  File "<string>", line 0, in ?
NameError: name 'obj' is not defined

only in a convoluted way. Let's make f()'s local variable obj visible in
g(), too:

>>> def f(obj="x"):
...     def g():
...             obj # now you can see me
...             return eval("obj")
...     return g()
...
>>> f()
'x'

Here's another way that is viable with lambda, too. 

>>> def f(obj="x"):
...     return (lambda obj=obj: eval("obj"))()
...
>>> f()
'x'

I'm sure you can fix your list_members() accordingly. Note that rebinding
obj between the definition and call of g() will affect the result only in
the first of the last two examples. 

And now for something completely different:

>>> def list_members(obj):
...     return [getattr(obj, name) for name in dir(obj)]
...
>>> import os
>>> list_members(os)[:5]
[73, 78, 65, 74, 68]
>>>

Peter



From rkern at ucsd.edu  Sat Apr 23 23:35:55 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 23 Apr 2005 20:35:55 -0700
Subject: Variables
In-Reply-To: <426B083A.70104@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<426B083A.70104@cloudthunder.com>
Message-ID: <d4f3tn$5rq$1@sea.gmane.org>

Richard Blackwood wrote:

> Indeed, this language is math. My friend says that foo is a constant and 
> necessarily not a variable. If I had written foo = raw_input(), he would 
> say that foo is a variable. Which is perfectly fine except that he 
> insists that since programming came from math, the concept of variable 
> is necessarily the identical. This can not be true. For example, I may 
> define foo as being a dictionary, but I can not do this within math 
> because there is no concept of dictionaries within mathematics; yet foo 
> is a variable, a name bound to a value which can change.

Your friend needs to learn, and very quickly if he persists in 
inflicting his erroneous pedantry on other people, that technical terms 
have different meanings in different fields, even if one can imagine 
that one "came from" the other. Hell, even in the same field, it can 
mean different things. Ask him what "domain" means in mathematics. And 
check his answer[1].

While one could argue that using the term "variable" for Python names is 
  incorrect for good programming reasons, your friend's reasoning is 
ridiculous.

[1] http://mathworld.wolfram.com/Domain.html

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From jdh2358 at gmail.com  Fri Apr 22 14:43:07 2005
From: jdh2358 at gmail.com (jdh2358 at gmail.com)
Date: 22 Apr 2005 11:43:07 -0700
Subject: trying to read from dying disk
Message-ID: <1114195387.535143.76860@o13g2000cwo.googlegroups.com>

I have a python file that is trying to read raw data from a raw
partition on a dying dist, eg

  f = file('/dev/sda')
  f.seek(SOMEWHERE)
  s = f.read(SOMEBYTES)

On some blocks, the read succeeds, on others it fails and an IOError is
thrown, and on others it appears to hang indefinitely and will not
respond to any attempt to kill it with 'kill -9 PID', etc.

Is there anyway to do a timeout read on this kind of file, or even to
kill the process once it hangs?

linux kernel 2.6.10
python 2.4.1

Thanks!
JDH



From tzot at sil-tec.gr  Wed Apr 20 11:15:18 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 18:15:18 +0300
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
Message-ID: <70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>

On Wed, 20 Apr 2005 16:13:32 +0300, rumours say that Maxim Kasimov
<kasimov at i.com.ua> might have written:

>but what if i just can't to do this becouse i'm working thrue ssh, and have to use only installed editors (such as vi)

If you use plain vi (not vim) and you want to comment e.g. 5 lines of
code, go to the first of these five and:

- if autoindent type:

	5>>O^Dif 0:{ESC}

^D above is Ctrl-D, {ESC} is your Escape key

- if noautoindent type:

	YP^Cif 0:{ESC}j5>>

^C above is literal ^, literal C, *NOT* Ctrl-C; {ESC} is your Escape key

To control autoindent, you can type:

:se ai

or

:se noai

If you need more help, I would gladly send you the output of `man vi'
from a non-GNU Unix.  I can also send you the output of `man vim' from a
GNU system.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From kent37 at tds.net  Sun Apr 17 16:21:07 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 17 Apr 2005 16:21:07 -0400
Subject: Accessing multidimensional lists with an index list
In-Reply-To: <32903d4e.0504171150.73b7feb0@posting.google.com>
References: <32903d4e.0504171150.73b7feb0@posting.google.com>
Message-ID: <4262c100_3@newspeer2.tds.net>

Gabriel Birke wrote:
> Given the multidimensional list l:
> l = [ {'v1': 1, 'v2': 2},
> 	  [ {'v1':4, 'v2': 7},
> 	    {'v1': 9, 'v2': 86},
> 		[ {'v1': 77, 'v2': 88}]
> 	  ]
> 	 ]
> 
> I want to access specific items the indices of which are stored in
> another list. For now, I created a function to do this:
> 
> def getNestedValue(l, indices):
> 	while len(indices) > 0:
> 		i = indices.pop(0)
> 		l = l[i] #In future versions, put error checking here
> 	return l
> 
> Is there a more elegant or performant language construct to accomplish
> my task?

def getNestedValue(l, indices):
	for i in indices:
		l = l[i] #In future versions, put error checking here
	return l

Kent


From cjw at sympatico.ca  Sat Apr 23 19:59:12 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sat, 23 Apr 2005 19:59:12 -0400
Subject: Using Ming on Windows
In-Reply-To: <mailman.2356.1114287722.1799.python-list@python.org>
References: <d4ea01$m02$1@sea.gmane.org>
	<mailman.2356.1114287722.1799.python-list@python.org>
Message-ID: <426AE150.5030109@sympatico.ca>

Jack Diederich wrote:
> On Sat, Apr 23, 2005 at 05:13:29PM -0300, Andr? Roberge wrote:
> 
>>I tried to install Ming
>>(http://sourceforge.net/projects/ming/)
>>on Windows to use with Python *but*
>>I can't [/don't know how to] use "make" to install it.
>>
>>Does anyone know where I could find a ready-made compiled
>>version for Windows to just "put in" my site-packages directory.
>>
>>Any help would be appreciated.
>>
> 
> Ming seems to be abandoded/unsupported.  Use groups.google.com to
> find some hints on how to install it.  I've done it on linux, but
> never tried on windows (why would I?) and replied with some
> suggestions last time it came up on c.l.py
> 
> -jackdied
I installed MinGW on a Windows XP with no trouble.  One needs to install 
MSYS, as well as MinGW, since some modules (eg. make) are only available
in MSYS.

Currently, I am trying to build a package from source and have some 
unresolved problems.  Earlier I had tried to use the Borland 
commandline, without success.

Colin W.


From steven.bethard at gmail.com  Thu Apr 28 21:56:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 28 Apr 2005 19:56:53 -0600
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <1114724023.743271.275710@g14g2000cwa.googlegroups.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
	<1114710873.292998.128090@f14g2000cwb.googlegroups.com>
	<1114714105.582253.12150@f14g2000cwb.googlegroups.com>
	<uIydnXD17Z2c2-zfRVn-2A@comcast.com>
	<1114724023.743271.275710@g14g2000cwa.googlegroups.com>
Message-ID: <S8qdneMehej_CezfRVn-rg@comcast.com>

Lonnie Princehouse wrote:
>>Likewise, the above is basically just an inefficient way of writing:
>>
>>def date_key(book):
>>    return book.data
>>
>>def author_and_date_key(book):
>>    return (author_key(book), date_key(book))
> 
> 
> It's certainly more elegant, but I wanted to talk about the mechanics
> of comparison functions =)
> 
> I don't know that it's more or less efficient in execution.  That
> depends on a few factors.

For most cases, key= will be more efficient than cmp=.  The key= 
argument will only be called once for each item in the list.  The cmp= 
argument will be called once for each comparison:

py> class Cmp(object):
...     def __init__(self):
...         self.count = 0
...     def __call__(self, x, y):
...         self.count += 1
...         return cmp(x, y)
...
py> class Key(object):
...     def __init__(self):
...         self.count = 0
...     def __call__(self, x):
...         self.count += 1
...         return x
...
py> import random
py> lst = range(1000)
py> random.shuffle(lst)
py> lst2 = list(lst)
py> c = Cmp()
py> lst.sort(cmp=c)
py> c.count
8599
py> k = Key()
py> lst.sort(key=k)
py> k.count
1000

Since in all but a few corner cases (e.g. where the list is already 
sorted) there will be way more comparisons than items, the key= argument 
will minimize the number of function calls.  Since function calls are 
one of the more expensive operations in Python, my guess is that there 
are very few cases where you would want to use the cmp= argument if you 
know you can use the key= argument.

STeVe


From firstname.lastname at iki.fi-spam  Sat Apr  2 01:35:02 2005
From: firstname.lastname at iki.fi-spam (Simo Melenius)
Date: 02 Apr 2005 09:35:02 +0300
Subject: How To Do It Faster?!?
References: <mailman.1216.1112400155.1799.python-list@python.org>
Message-ID: <87sm29fzzd.fsf@sme.intra.citec.fi>

andrea_gavana at tin.it writes:

> Every user of thsi big directory works on big studies regarding oil
> fields. Knowing the amount of data (and number of files) we have to
> deal with (produced by simulators, visualization tools, and so on)
> and knowing that users are usually lazy in doing clean up of
> unused/old files, this is a way for one of us to "fast" scan all the
> directories and identify which files belong to him. Having them in
> an organized, size-sorted wxPython list, the user can decide if he
> want to delete some files (that almost surely he forgot even that
> they exist...) or not. It is easy as a button click (retrieve the
> data-->delete the files).

Correct me if I'm wrong but since it _seems_ that the listing doesn't
need to be up-to-date each minute/hour as the users will be looking
primarily for old/unused files, why not have a daily cronjob on the
Unix server to produce an appropriate file list on e.g. the root
directory of your file server?

Your Python client would then load that (possibly compressed) text
file from the network share and find the needed bits in there.

Note that if some "old/unneeded" files are missing today, they'll show
right up the following day.

For example, running the GNU find command like this:

$ find . -type f -printf "%T@ %u %s %p\n" > /yourserverroot/files.txt

produces a file where each line contains the last modified time,
username, size and path for one file. Dead easy to parse with Python,
and you'll only have to set up the cronjob _once_ on the Unix server.

(If the file becomes too big, grep can be additionally used to split
the file e.g. per each user.)


br,
S

-- 
firstname.lastname at iki.fi-spam


From wp at tekran.spammenziemichnichtdankeschon.com  Thu Apr  7 10:27:25 2005
From: wp at tekran.spammenziemichnichtdankeschon.com (Warren Postma)
Date: Thu, 07 Apr 2005 10:27:25 -0400
Subject: Testing threading
In-Reply-To: <1112723255.126565.290450@o13g2000cwo.googlegroups.com>
References: <1112723255.126565.290450@o13g2000cwo.googlegroups.com>
Message-ID: <jsb5e.21703$Fy3.1249674@news20.bellglobal.com>

George Sakkis wrote:
> How one goes on testing a threaded program, apart from doing a few
> successful runs and crossing his fingers that it at least follows the
> 'correct 99.9999% of the time' rule ? 

If you haven't been in there and stepped through all the code, looked 
for a reasonable set of test cases, and tried those test cases, then you 
haven't tested! :-)

You test a threaded program the same way you test a non-threaded
program. Thoroughly.  Test cases. YOu don't *have* to write unit tests,
but it sure helps. Code running a few times isn't tested.  If you
prefer to test manually, really want to be thorough you have to find 
ways to make sure you've done coverage of a reasonable set of test 
cases.  How do I get myself a set of test cases? Personally I like to 
walk through my code in a debugger and ask myself "how could this go 
wrong?".  "What if I pass a huge amount of data in here? How 
unresponsive can I find ways to make this thread get?" "If this is a 
network communications thread, let's try all the various error 
conditions that can happen on a real network.". ...

When I think of an idea on how things could go wrong ("What happens if
the data isn't here or is invalid?"/"Where should I be catching 
exceptions and how should I be handling them?")

Regards,

Warren


From donn at drizzle.com  Mon Apr 25 11:26:00 2005
From: donn at drizzle.com (Donn Cave)
Date: Mon, 25 Apr 2005 15:26:00 -0000
Subject: Variables
References: None <mailman.2429.1114406690.1799.python-list@python.org>
Message-ID: <1114442759.889745@yasure>

Quoth Richard Blackwood <richardblackwood at cloudthunder.com>:
...
| Would you agree that the concept of variables differs in very important 
| ways between the domains of math and programming?

No, if "math" means the elementary notions that I have been exposed to
and "very important" means "important to implementors".  Cf. my prior
post on this.  Variables are semantically the same, "=" is different but
can be modeled in equational terms with a fairly simple transformation.

	Donn Cave, donn at drizzle.com


From thomas at eforms.co.nz  Fri Apr 29 00:00:59 2005
From: thomas at eforms.co.nz (Thomas)
Date: Fri, 29 Apr 2005 16:00:59 +1200
Subject: uploading large file 100mb
Message-ID: <20050429035906.68BCA37025@mail.tintz.co.nz>

Hi I am getting the following error when uploading large files.

 

Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
win32

Type "help", "copyright", "credits" or "license" for more information.

>>> ## working on region in file
c:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/python-1156QtG.py...

Traceback (most recent call last):

  File "<stdin>", line 1, in ?

  File "c:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/python-1156QtG.py", line 79, in ?

 
post_multipart("192.168.100.233","/UploaderHttp/",[('test','valTest')],[('FI
LE1','TM_A5_Bulk.pdf',data)]);

  File "c:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/python-1156QtG.py", line 17, in
post_multipart

    h.send(body)

  File "C:\Python23\lib\httplib.py", line 576, in send

    self.sock.sendall(str)

  File "<string>", line 1, in sendall

socket.error: (10055, 'No buffer space available')

>>> 

 

 

Thanks

Thomas

 

 

 

The code that I am using

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

import httplib, mimetypes

 

def post_multipart(host, selector, fields, files):

    """

    Post fields and files to an http host as multipart/form-data.

    fields is a sequence of (name, value) elements for regular form fields.

    files is a sequence of (name, filename, value) elements for data to be
uploaded as files

    Return the server's response page.

    """

    content_type, body = encode_multipart_formdata(fields, files)

    h = httplib.HTTP(host)

    h.putrequest('POST', selector)

    h.putheader('content-type', content_type)

    h.putheader('content-length', str(len(body)))

    h.endheaders()

    #print body;

    h.send(body)

    errcode, errmsg, headers = h.getreply()

    return h.file.read()

 

def encode_multipart_formdata(fields, files):

    """

    fields is a sequence of (name, value) elements for regular form fields.

    files is a sequence of (name, filename, value) elements for data to be
uploaded as files

    Return (content_type, body) ready for httplib.HTTP instance

    """

    BOUNDARY = '----------ThIs_Is_tHe_bouNdaRY_$'

    CRLF = '\r\n'

    L = []

    for (key, value) in fields:

        L.append('--' + BOUNDARY)

        L.append('Content-Disposition: form-data; name="%s"' % key)

        L.append('')

        L.append(value)

    for (key, filename, value) in files:

        L.append('--' + BOUNDARY)

        L.append('Content-Disposition: form-data; name="%s"; filename="%s"'
% (key, filename))

        L.append('Content-Type: %s' % get_content_type(filename))

        L.append('')

        L.append(value)

    L.append('--' + BOUNDARY + '--')

    L.append('')

    body = CRLF.join(L)

    content_type = 'multipart/form-data; boundary=%s' % BOUNDARY

    return content_type, body

 

def get_content_type(filename):

    return mimetypes.guess_type(filename)[0] or 'application/octet-stream'

 

FILE= 'c:/Documents and Settings/Administrator/Desktop/TM_A5_Bulk.pdf';

f = file(FILE, "rb")

data = f.read()

f.close()

post_multipart("192.168.100.233","/UploaderHttp/",[('test','valTest')],[('FI
LE1','TM_A5_Bulk.pdf',data)]);

-------------- next part --------------
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From ritterhaus at yahoo.com  Wed Apr  6 15:14:37 2005
From: ritterhaus at yahoo.com (ritterhaus at yahoo.com)
Date: 6 Apr 2005 12:14:37 -0700
Subject: Python sleep doesn't work right in a loop?
Message-ID: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>

Just a simple bit of code to toggle between two state at intervals...

import time
for i in range(4):
    print 'On'
    time.sleep(1)
    print 'Off'
    time.sleep(1)

... SHOULD toggle On and Off four times with one-second pauses. When I
run this, the loop pauses the full eight seconds then prints the Ons
and Offs all at once. What's up with that?



From fredrik at pythonware.com  Sat Apr 23 13:11:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 23 Apr 2005 19:11:19 +0200
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org><IFEpEp.7Gz@bath.ac.uk>
	<426A76A5.2050906@mage.hu>
Message-ID: <d4e12i$u1s$1@sea.gmane.org>

"Mage" wrote:

> I don't think so. Bad programmers are able to write bad programs in any
> language.

in PHP, good programmers are able to write bad programs without
even noticing.

(every successful server attack I've seen closely the last few years
have been through PHP.  it's totally without competition in this area)

> However one of the worst cases is the sql injection attack. And sql
> injections must be handled neither by php nor by python but by the
> programmer.

sql injection?  what's your excuse for not using data binding?

</F>





From tjreedy at udel.edu  Fri Apr  1 13:39:47 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 13:39:47 -0500
Subject: that is it is not it (logic in Python)
References: <424d0be1$0$2882$626a14ce@news.free.fr>
Message-ID: <d2k4eu$ufj$1@sea.gmane.org>


"F. Petitjean" <littlejohn.75 at news.proxad.net> wrote in message 
news:424d0be1$0$2882$626a14ce at news.free.fr...
>I want to know if iter(iterator) returns always its argument (when
> argument is an iterator)

By the strict definition of iterator (versus iterable) that requires that 
as a condition to be an iterator, then yes.  If you use a looser definition 
of iterator, then perhaps not.

>>>> iterable = range(10)
>>>> it = iter(iterable)
>>>> that = iter(it)
>>>> that is it
> True    # Good!
>>>> that is it is not it

This is equivalent to '(that is it) and (it is not it)' which is clearly 
false.

> False   # What ?

Reread the ref manual on chained comparison operators.

Terry J. Reedy





From electric.sunrise at gmail.com  Wed Apr  6 23:17:21 2005
From: electric.sunrise at gmail.com (Matt@revera)
Date: 6 Apr 2005 20:17:21 -0700
Subject: Overwrite just one line? Am I a n00b or is this impossible?
	Both? :D
In-Reply-To: <PtKdnVpGjLlOwsnfRVn-gg@speakeasy.net>
References: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>
	<PtKdnVpGjLlOwsnfRVn-gg@speakeasy.net>
Message-ID: <1112843841.813518.172350@l41g2000cwc.googlegroups.com>


Erik Max Francis wrote:
> Matt at revera wrote:
>
> > I'd like to overwrite just one line of a binary file, based on a
> > position set by seek().  Is there no way to do this? As far as I
can
> > tell I need to read the whole file, change the line, and write it
all
> > back out.  Not exactly easy on the memory, but I see no other
solution.
>
> You need to find what "just one line" means in a binary format.  If
the
> chunk you're replacing and the chunk you want to replace it with are
of
> different sizes, then you need to use a temporary file (or read the
> remainder of the file in memory).
>
> Otherwise, open the file in read-write binary mode ("r+b") and seek
and
> write appropriately.  In the general case, you need to write to a
> temporary file to get the job done.
>
> Memory usage is not a factor, here; read and write the temporary
files
> in chunks.  That way you can manage the memory usage to whatever
upper
> bound you wish.
>
> --
> Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
> San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
>    Be able to be alone. Lose not the advantage of solitude.
>    -- Sir Thomas Browne

Ok makes sense, I was using a+b.  Would r+b be a better choice? I was
under the impression that it was only for reading.  I am writing
something of the same length in fact, but the python reference says
that on some versions of unix (I'm on mac OS X) append will ignore the
seek() position and dump it at the bottom of the file - which is
exactly what it's doing.  Am I stuck?

Thanks for all your help!



From jjl at pobox.com  Wed Apr  6 14:39:17 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Apr 2005 19:39:17 +0100
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
	<20050406010456.GA31984@alcyon.progiciels-bpi.ca>
Message-ID: <zmwbkawa.fsf@pobox.com>

Fran?ois Pinard <pinard at iro.umontreal.ca> writes:
[...]
> Overall, Vim is also cleaner than Emacs, and this pleases me.
[...]

Is this still true when comparing XEmacs vs. vim? (rather than GNU
Emacs vs. vim)  I've always used GNU Emacs, but I have got the
impression that XEmacs is (was?) cleaner in some ways.


John



From tjreedy at udel.edu  Fri Apr  1 18:27:48 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 18:27:48 -0500
Subject: Ternary Operator in Python
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com><mailman.1198.1112380413.1799.python-list@python.org>
	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
Message-ID: <d2klat$ghj$1@sea.gmane.org>


"Carl Banks" <invalidemail at aerojockey.com> wrote in message 
news:1112391650.018826.274970 at l41g2000cwc.googlegroups.com...
>> A unary operator has one operand; a binary operator has two operands;
>> ternary operator has three operands.  Python has none built-in,
>
> Not so fast, my friend.  What about the expression "0.0 < a < 1.0"?

Gee, what about 0.0 < a < 1.0 < b < 2.0?  I see both as synthesized 
multinary operators, but your are right in that this combination does act 
differently than a+b+c.

Terry J. Reedy






From cfriedl at bigpond.net.au  Wed Apr 27 21:51:23 2005
From: cfriedl at bigpond.net.au (bwaha)
Date: 27 Apr 2005 18:51:23 -0700
Subject: suggestions on how to do this
In-Reply-To: <1114648489.758666.224590@o13g2000cwo.googlegroups.com>
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
	<1114648489.758666.224590@o13g2000cwo.googlegroups.com>
Message-ID: <1114653083.150763.269970@l41g2000cwc.googlegroups.com>

Hi bgs

Many thanks. This generates the correct coefficients. I am studying
your implementation now. I've  not used a dictionary of dictionaries
before so there's a bit of a learning curve going on right now. However
I can see that b[k] holds the relevant info (coefficients and powers)
so I can easily modify it to collect terms with like powers. As for
speed, its not a concern. Thanks again.

bwaha Chris



From mwm at mired.org  Wed Apr 20 03:15:28 2005
From: mwm at mired.org (Mike Meyer)
Date: Wed, 20 Apr 2005 02:15:28 -0500
Subject: pre-PEP: Simple Thunks
References: <3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
	<3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
	<Pine.A41.4.61b.0504171920010.34498@dante69.u.washington.edu>
	<eve761hv7vjktfppqb51eigi9otl0fldh6@4ax.com>
	<Pine.A41.4.61b.0504181043530.113056@dante74.u.washington.edu>
	<p4696196246vskcj3bua373fpvbf64hd2o@4ax.com>
Message-ID: <86u0m1udf3.fsf@guru.mired.org>

Ron_Adam <radam2_ at _tampabay.rr.com> writes:
> Here's yet another way to do it, but it has some limitations as well.
>
> import pickle
> def pickle_it(filename, obj, commands):
>     try:
>         f = open(filename, 'r')    
>         obj = pickle.load(f)
>         f.close()
>     except IOError:
>         pass 	
>     for i in commands:
>         i[0](i[1])
>     f = open(filename, 'w')
>     pickle.dump(obj, f)
>     f.close()
>  
> file = 'filename'
> L = []
>
> opps = [ (L.append,'more data'),
>          (L.append,'even more data') ]
> pickle_it(file, L, opps)

Um - it doesn't look like this will work. You pass L in as the "obj"
paremeter, and then it gets changed to the results of a
pickle.load. However, you call L.append in the for loop, so the data
will be appended to L, not obj. You'll lose an list elements that were
in the pickle.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From fredrik at pythonware.com  Wed Apr 27 06:57:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 27 Apr 2005 12:57:39 +0200
Subject: how to connect my sql with Python
References: <20050427104754.45719.qmail@web8407.mail.in.yahoo.com>
Message-ID: <d4nqt1$nv$1@sea.gmane.org>

"praba kar" <prabapython at yahoo.co.in> wrote:

>       I am doing Python-cgi Project in my company.
> To connect My sql database(Mysql 4.1.11.) into
> Python(2.3.3) cgi.  I have installed
> MySQL-python-1.2.0. After installation of
> MySQL-Python-1.2.0 I try import
> MySQLdb module.  It raised the following error
>
>>>import MySQLdb
>
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>  File
> "/System/Links/Libraries/python2.4/site-packages/MySQLdb/__init__.py",
> line 27, in ?
>    import _mysql
> ImportError: libmysqlclient.so.14: cannot open shared
> object file: No such file or directory
>
> so kindly give me guidance to connect Mysql and Python

have you installed the required "libmysqlclient" library?  if you have, have you
installed in a location where the runtime linker can find it?

</F> 





From jarrod.roberson at gmail.com  Fri Apr 15 16:28:03 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 15 Apr 2005 13:28:03 -0700
Subject: How to fix this error in the example in 6.1.4 Files and
	Directories
In-Reply-To: <d3ot48$vbl$03$1@news.t-online.com>
References: <1113583932.703797.118610@o13g2000cwo.googlegroups.com>
	<d3ot48$vbl$03$1@news.t-online.com>
Message-ID: <1113596883.573243.197250@f14g2000cwb.googlegroups.com>

can't see the forest for the trees, that seems to be the problem,
thanks for pointing out the obvious ( that I couldn't see ) :-(



From john at castleamber.com  Mon Apr 25 15:25:34 2005
From: john at castleamber.com (John Bokma)
Date: 25 Apr 2005 19:25:34 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
Message-ID: <Xns964392B70C958castleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <postmaster at castleamber.com> writes:
>> Mike Meyer wrote:

[ snip ]

>> do you really think that for / foreach and things like if / unless
>> bloat a language processor? I think you take your "pure programming
>> lanuage" way to far, and really don't understand your choice of
>> Python in your crusade.
> 
> I don't think I take it to far. All my experience dealing with
> languages that took the opposite tack (i.e. - Perl and Common LISP)
> demonstrate that such things are a bad idea.

Funny, quite a lot of Perl programmers consider using unless instead of 
if ! a good idea. And if a programmer is not able to grasp the meaning 
of unless if he sees it the first time, he should be able to look it up. 
And if a programmer says that it burdens his mental processes, or slows 
him down, I hope I never have to work with him/her and/or maintain 
his/her code.

>>> and increases the semantic load on
>>> the programmer. The best the programmer can do, as you imply, is to
>>> ignore the extraneous methods.
>> I am curious of a list of extraneous methods in Perl (more about the 
>> size by the way)
> 
> Methods isn't a very good word choice on my part, as it has to many
> meanings. But saying "extraneous ways to do it" is a bit wordy. I
> already gave you one such list, covering just the syntactic elements
> of the language.

I must have missed it, since I didn't see it.

>> A poorly skilled programmer has to puzzle about a lot of more things.
>> Or you think list comprehension (sp?) and all the tricks with it are
>> clear? or the and or trick? I just had a glance on Python, but what
>> probably to you is one clear path isn't clear to me yet. And I doubt
>> that can all be blamed on unpure new Python.
> 
> Correct - newbies have to puzzle about a lot of things. A good
> language design won't add to that set of things without a good
> reason. Adding features because you can is adding things to puzzle
> about without a good reason.

I doubt that features have been added to Perl just because. Even ones 
that look like it, unless for example, have an excellent use, it makes 
the code more readable.

>>> No, one I blew. One you still got wrong.
>> Which one?
> 
> Faling to put in the parens that would have distinguished the argument
> lists from the list of operators.

*sigh* you gave a list of problems, I replied by putting all answers on 
one line, with () around them, and commas between them. I was not 
constructing a tuple, or a list in Perl 

> Actually, it's not clear the grep was right either. The return value
> of grep (and map) isn't always the right thing.

If you want to have a list of results and you assign it to a scalar, you 
are doing the wrong thing.

But the bottom line is: I gave you answers to all, except one, of your 
problems, you think my set of answers is a kind of Perl list, you 
thought the grep was plainly wrong, and I guess you are not comfortable 
with split.

And this gives me the feeling that you either haven't been using Perl 
for over 4 years, or was never got beyond the absolute beginner level. 
In the latter case I can imagine that you are overwhelmed by Perl. As 
would one by any language.

>>>> If I could have a peek at the Perl code you maintained I could tell
>>>> you (often by just seeing 3-5 lines) the status of the programmer
>>>> who wrote it :-)
>>> So you'd either say you were wrong, or that my second contention was
>>> right. Either one would be a bad side effect of TMTOWTDI.
>> I am right, and you are wrong ;-)
> 
> In which case, I'm right in claiming that having more than one way to
> do things fragments the community - which is *still* a bad thing for
> the people writing the language.

It fragments it in a way every programming community is fragmented: 
absoluut beginner, beginner, junior, senior, guru. 

>> ARM assembly, told you ;-)
> 
> That's not a coverage. Unless ARM assembly includes garbage
> collection, dictionaries and similar things.

In a pure language such things are in the library.

>> Easier, sure. But does it turn beginners in rock solid programmers?
> 
> It means they never make errors like using free'd memory, or failing
> to free allocated memory. So in that since, yes, they are rock solid.

LOL, but they will make other mistakes. Otherwise, I am really curious, 
can you show a publication that shows that the number of bugs / 
application is much smaller when a garbage collection language is used, 
and one that does bounds checking?

>> So they looked close at one aspect of the language. But you think
>> that 10k lines of, say Java, has less bugs then 10k lines of C?
> 
> Nah. Then again, counting lines of code is a silly thing to do. You
> think 10K lines of C does as much as 10K lines of Java?

Depends of course, but rephrase: we take 10 programs of C, 10 of Java, 
each which are equal (except in the number of bugs). You think Java has 
less?

> The crucial
> question isn't how many bugs you get per line of code, it's how many
> bugs you get to achieve a given functionality. You can improve this
> number by cutting down the number of bugs per line of code, or by
> cutting down the number of lines of code needed to acheive a given
> functionality. Modern programming environments clearly improve the
> latter.

But are there now less bugs compared to a few years ago? Are, say, Java 
programs in general more bug free? 

>> And I am sure that you fixed enough bugs in the same *real* programs 
>> that were in no way related to this. I have fixed enough bugs in
>> Perl, Java, etc, to know that "life will find a way", so to speak.
> 
> We both agree you're always going to have bugs. I think that
> programming languages designed to eliminate whole classes of bugs are
> good thing, because bugs are a bad thing. You seem to argue that
> because we can't elimnate all bugs, we shouldn't eliminate any. That's
> simply silly.

Nope, I got the impression from you that Python restricts programmers, 
so they make less mistakes. They can't make mistakes of "whole classes", 
but that doesn't mean they are suddenly good programmers.

If I considered garbage collection bad, I would say so. But like airbags 
doesn't improve the driving skills of someone, so doesn't all kind of 
restrictions turn bad programmers suddenly in good programmers.

Moreover, good programmers rarely need to be restricted. But I don't see 
garbage collection as an anti-memory-leak restriction (which it can't be 
in all cases) but as a time saver.

>> What makes you think there are isolated communities?
> 
> Let's see. LISP - some of the communities were MacLISP, InterLISP,
> Zeta LISP, and Standard LISP. There are certainly others I
> forgot. Perl - they don't have names, they just show up in the code I
> have to maintain.

But is that because there are separate communities, or because there are 
different skill levels? Moreover, I hope that "have to maintain" was 
"had to maintain (some time ago)", because your Perl skills are more 
than lacking.

>> How long haven't you been in touch with Perl? 
> 
> Oh, are you claiming that PERL ships with HTML and XML parsers, SMTP
> clients and web servers in the standard library?

Which Perl? ActiveState Perl does indeed come with HTML, and XML 
parsers, SMTP, etc, clients. Web server(s), I have no idea, haven't 
needed a Perl webserver, I doubt it comes with AS Perl.

> That's odd - all the
> packages I see seem to want to install those things from CPAN.

Is there such a centralized place for libraries for Python?

>> I use either for or while. 
> 
> You never use the Perl foreach loop? That doesn't sound like a skilled
> Perl programmer to me.

I already stated you have little Perl experience. Now I have to change 
that to *extremely* little Perl experience.

So it seems I am right: the overwhelming effect of "many ways" is mainly 
seen by absolute beginners, who are able to make up many ways, even if 
there is just one or two :-D.

>> How did you measure this? And which distribution of Perl are you
>> talking about?
> 
> By looking at the functionality installed programs used from third
> parties (i.e. - CPAN in recent version) vs. what they used from the
> standard library. And in Perl 4 and 5.

Perl 4? Even Perl 5 is almost 11 years old. Which version of Perl 5 are 
you talking about?

>>> Right - Perl makes writing ugly,
>> Nope, the programmer does that.
> 
> No, the programme writes the ugly code. Perl makes it easy.

So, and who is to blame? Would you trust a programmer who can only write 
code in a certain way because he is restricted by the langauge to do so? 

And do you really think his/her code would be better compared to a 
skilled programmer?

>> And I think that there is the main problem in your whole story. You 
>> think this is a quest for superiority. It isn't.
> 
> What? You're not trying to find the superior tool for the application
> domain? Then what *are* you doing?

Programming, in a skilled way. There is no ultimate superior tool. Why 
do you think I am learning Python? Because I found the holy grail? Or 
that I just want another way to do things?

>> But if this all bothers you *this* much, I am afraid that the problem
>> is really behind the keyboard :-)
> 
> No, what bothers me *this* much is that every time I have to maintain
> a Perl program, I have to learn somebody else's subset/idioms/etc of
> the language. "All this" is the cause of that.

No. If this was crossposted in a Perl group, by now quite a lot of 
people would have pointed you out, probably in a less nice way, that 
your Perl skills are of a person who hasn't even gone beyond the first 
few chapters of "Learning Perl". 

>> Yup, to pick a tool out of a organized toolbox. Which is fine if
>> that's the only job involved. Programming, or as I see it, is not
>> about picking tools out of a box, but combining them.
> 
> Right. A good language will have an obvious tool for each part of the
> combination, so you don't spend time worrying about picking the right
> tools - the right choices are obvious. A bad language will have more
> than one tool for many parts of the combination, so you wind up
> wasting time on which of n interchangable tools is the right one
> instead of actually solving the problem at hand.

And a bad programmer will go at great length explaining how bad the 
tools are, because he has to learn them :-D

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


From sabbey at u.washington.edu  Fri Apr 15 19:44:58 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Fri, 15 Apr 2005 16:44:58 -0700
Subject: pre-PEP: Simple Thunks
Message-ID: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>

Here is a first draft of a PEP for thunks.  Please let me know what you 
think. If there is a positive response, I will create a real PEP.

I made a patch that implements thunks as described here. It is available 
at:
     http://staff.washington.edu/sabbey/py_do

Good background on thunks can be found in ref. [1].

Simple Thunks
-------------

Thunks are, as far as this PEP is concerned, anonymous functions that 
blend into their environment. They can be used in ways similar to code 
blocks in Ruby or Smalltalk. One specific use of thunks is as a way to 
abstract acquire/release code. Another use is as a complement to 
generators.

A Set of Examples
=================

Thunk statements contain a new keyword, 'do', as in the example below. The 
body of the thunk is the suite in the 'do' statement; it gets passed to 
the function appearing next to 'do'. The thunk gets inserted as the first 
argument to the function, reminiscent of the way 'self' is inserted as the 
first argument to methods.

def f(thunk):
    before()
    thunk()
    after()

do f():
    stuff()

The above code has the same effect as:

before()
stuff()
after()

Other arguments to 'f' get placed after the thunk:

def f(thunk, a, b):
     # a == 27, b == 28
     before()
     thunk()
     after()

do f(27, 28):
     stuff()

Thunks can also accept arguments:

def f(thunk):
    thunk(6,7)

do x,y in f():
    # x==6, y==7
    stuff(x,y)

The return value can be captured

def f(thunk):
    thunk()
    return 8

do t=f():
    # t not bound yet
    stuff()

print t
==> 8

Thunks blend into their environment

def f(thunk):
    thunk(6,7)

a = 20
do x,y in f():
    a = 54
print a,x,y

==> 54,6,7

Thunks can return values.  Since using 'return' would leave it unclear 
whether it is the thunk or the surrounding function that is returning, a 
different keyword should be used. By analogy with 'for' and 'while' loops, 
the 'continue' keyword is used for this purpose:

def f(thunk):
    before()
    t = thunk()
    # t == 11
    after()

do f():
    continue 11

Exceptions raised in the thunk pass through the thunk's caller's frame 
before returning to the frame in which the thunk is defined:

def catch_everything(thunk):
     try:
         thunk()
     except:
         pass    # SomeException gets caught here

try:
     do catch_everything():
        raise SomeException
except:
     pass        # SomeException doesn't get caught here because it was 
already caught

Because thunks blend into their environment, a thunk cannot be used after 
its surrounding 'do' statement has finished:

thunk_saver = None
def f(thunk):
     global thunk_saver
     thunk_saver = thunk

do f():
     pass

thunk_saver() # exception, thunk has expired

'break' and 'return' should probably not be allowed in thunks.  One could 
use exceptions to simulate these, but it would be surprising to have 
exceptions occur in what would otherwise be a non-exceptional situation. 
One would have to use try/finally blocks in all code that calls thunks 
just to deal with normal situations.  For example, using code like

def f(thunk):
     thunk()
     prevent_core_meltdown()

with code like

do f():
     p = 1
return p

would have a different effect than using it with

do f():
     return 1

This behavior is potentially a cause of bugs since these two examples 
might seem identical at first glance.

The thunk evaluates in the same frame as the function in which it was 
defined. This frame is accessible:

def f(thunk):
     frame = thunk.tk_frame

do f():
     pass

Motivation
==========

Thunks can be used to solve most of the problems addressed by PEP 310 [2] 
and PEP 288 [3].

PEP 310 deals with the abstraction of acquire/release code. Such code is 
needed when one needs to acquire a resource before its use and release it 
after.  This often requires boilerplate, it is easy to get wrong, and 
there is no visual indication that the before and after parts of the code 
are related.  Thunks solve these problems by allowing the acquire/release 
code to be written in a single, re-usable function.

def acquire_release(thunk):
    f = acquire()
    try:
       thunk(f)
    finally:
       f.release()

do t in acquire_release():
    print t

More generally, thunks can be used whenever there is a repeated need for 
the same code to appear before and after other code. For example,

do WaitCursor():
      compute_for_a_long_time()

is more organized, easier to read and less bug-prone than the code

DoWaitCursor(1)
compute_for_a_long_time()
DoWaitCursor(-1)

PEP 288 tries to overcome some of the limitations of generators.  One 
limitation is that a 'yield' is not allowed in the 'try' block of a 
'try'/'finally' statement.

def get_items():
     f = acquire()
     try:
         for i in f:
             yield i   # syntax error
     finally:
         f.release()

for i in get_items():
     print i

This code is not allowed because execution might never return after the 
'yield' statement and therefore there is no way to ensure that the 
'finally' block is executed.  A prohibition on such yields lessens the 
suitability of generators as a way to produce items from a resource that 
needs to be closed.  Of course, the generator could be wrapped in a class 
that closes the resource, but this is a complication one would like to 
avoid, and does not ensure that the resource will be released in a timely 
manner.  Thunks do not have this limitation because the thunk-accepting 
function is in control-- execution cannot break out of the 'do' statement 
without first passing through the thunk-accepting function.

def get_items(thunk):    # <-- "thunk-accepting function"
     f = acquire()
     try:
         for i in f:
             thunk(i)      # A-OK
     finally:
         f.release()

do i in get_items():
    print i

Even though thunks can be used in some ways that generators cannot, they 
are not nearly a replacement for generators.  Importantly, one has no 
analogue of the 'next' method of generators when using thunks:

def f():
     yield 89
     yield 91

g = f()
g.next()  # == 89
g.next()  # == 91

[1] see the "Extended Function syntax" thread, 
http://mail.python.org/pipermail/python-dev/2003-February/
[2] http://www.python.org/peps/pep-0310.html
[3] http://www.python.org/peps/pep-0288.html


From robin at SPAMREMOVEjessikat.fsnet.co.uk  Thu Apr 28 16:33:04 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Thu, 28 Apr 2005 20:33:04 +0000
Subject: regex over files
In-Reply-To: <mailman.2611.1114656019.1799.python-list@python.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<mailman.2611.1114656019.1799.python-list@python.org>
Message-ID: <42714880.4080205@jessikat.fsnet.co.uk>

Skip Montanaro wrote:
>...
> 
> I'm not sure why the mmap() solution is so much slower for you.  Perhaps on
> some systems files opened for reading are mmap'd under the covers.  I'm sure
> it's highly platform-dependent.  (My results on MacOSX - see below - are
> somewhat better.)
> 
> Let me return to your original problem though, doing regex operations on
> files.  I modified your two scripts slightly:
> 

I'm sure my results are dependent on something other than the coding 
style I suspect file/disk cache and paging operates here. Note that we 
now agree on total match length and split count. However, when the 
windows VM goes into paging mode the mmap thing falls off the world as I 
would expect for a thrashing system.

eg small memory (relatively)
C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=3.55

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=8.25

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=9.77

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=5.09

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=6.17

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=4.64

and large memory
C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=20.16

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=136.42

At the end of this run I had to wait quite a long time for other things 
to become responsive (ie things were entirely paged out).

as another data point with sscan0/1.py (slight mods of your code) I get 
this with a 200mb file on freeBSD 4.9

/usr/RL_HOME/users/robin/sstest:
$ python sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=7.37
/usr/RL_HOME/users/robin/sstest:
$ python sscan1.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=129.65
/usr/RL_HOME/users/robin/sstest:

ie the freeBSD vm seems to thrash just as nastily as xp :(


####################################################################
Here I've implemented slightly modified versions of the scanners that 
you put forward.

eg

#sscan0.py thanks to Bengt
import sys, time, re
fn = sys.argv[1]
rxo = re.compile('XXXXX')

def frxsplit(path, rxo, chunksize=4096):
	buffer = ''
	for chunk in iter((lambda f=open(path,'rb'): f.read(chunksize)),''):
		buffer += chunk
		pieces = rxo.split(buffer)
		for piece in pieces[:-1]: yield piece
		buffer = pieces[-1]
	yield buffer
l=n=0
t0 = time.time()
for mat in frxsplit(fn,rxo):
	n += 1
	l += len(mat)
t1 = time.time()

print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))

#sscan1.py thanks to Skip
import sys, time, mmap, os, re
fn = sys.argv[1]
fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
l=n=0
t0 = time.time()
for mat in re.split("XXXXX", s):
	n += 1
	l += len(mat)
t1 = time.time()

print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1
-- 
Robin Becker


From martin at v.loewis.de  Fri Apr  1 00:24:44 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 01 Apr 2005 07:24:44 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
In-Reply-To: <1112308637.190093.70910@l41g2000cwc.googlegroups.com>
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com>
	<424c5c9b$0$13375$9b622d9e@news.freenet.de>
	<1112308637.190093.70910@l41g2000cwc.googlegroups.com>
Message-ID: <424cdb1c$0$19434$9b622d9e@news.freenet.de>

Cappy2112 wrote:
> Do you really think this is a safe solution?

Not sure which of the three solutions I mentioned you are referring
to as "this".

> How do you deal with features that are in new 2.4, but you invoke it
> with the exe from 2.3?

If you want to have the script run with both Python 2.3 and 2.4, you
should avoid using features new in 2.4. Alternatively, you can check
for the presence of the feature, and fall back gracefully if the feature
is missing.

> The imports have to be handled as well, and the dlls, and the libs too

Yes. Using different interpreter binaries (i.e. \python23\python.exe
vs. \python24\python.exe) will automatically take care of this.
Each interpreter binary will safely have its own Python path, use its
own dlls, and its own libs.

Regards,
Martin


From rbt at athop1.ath.vt.edu  Mon Apr 25 16:41:07 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 25 Apr 2005 16:41:07 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <2zcbe.312$461.60@newssvr11.news.prodigy.com>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
	<vi0q61pu6ou038asoc0okleerhg92ni8ic@4ax.com>
	<2zcbe.312$461.60@newssvr11.news.prodigy.com>
Message-ID: <d4jkl3$42k$1@solaris.cc.vt.edu>

Philippe C. Martin wrote:
> This is highly frustrating !!
> 
> Did Athena come to help or not ?
> 
> 
> 
> 
> 
> Christos TZOTZIOY Georgiou wrote:
> 
> 
>>On Mon, 25 Apr 2005 10:32:11 -0400, rumours say that rbt
>><rbt at athop1.ath.vt.edu> might have written:
>>
>>
>>>I do not seek to provoke. Sorry if my question comes across that way to
>>>you.
>>
>>Thanks for giving attention to my post, no need for apologies.
>>
>>By the way, you didn't say in which way ReportLab and pdflib are not
>>helpful to you (packages suggested directly by Mike Meyer and indirectly
>>by me).
> 
> 
  NO.


From mage at mage.hu  Sun Apr 24 14:18:43 2005
From: mage at mage.hu (Mage)
Date: Sun, 24 Apr 2005 20:18:43 +0200
Subject: when will the file be closed
Message-ID: <426BE303.3040305@mage.hu>

       Hello,

The question is above: when will these file be closed?

for s in file('/etc/passwd'):
    print s

file('/home/mage/test.txt','w').write('foo')

       Mage




From paul at boddie.org.uk  Thu Apr  7 10:44:05 2005
From: paul at boddie.org.uk (Paul Boddie)
Date: 7 Apr 2005 07:44:05 -0700
Subject: Calling a Perl Module from Python ( future direction of Python)
References: <351e8871050406092449d4585b@mail.gmail.com>	<20050406184257.71587.qmail@web20707.mail.yahoo.com>
	<mailman.1452.1112814963.1799.python-list@python.org>
Message-ID: <5339b60d.0504070644.2bf4153b@posting.google.com>

Steve Holden <steve at holdenweb.com> wrote in message news:<mailman.1452.1112814963.1799.python-list at python.org>...
> 
> You might also look at the work Richard Jones and others did on PyPI 
> during their PyCon sprint. Richard was confident that PyPI

Hmmm. It would appear that this information wasn't "cleared" by the PSU. ;-)

Paul


From pete at osc.edu  Tue Apr 19 10:04:15 2005
From: pete at osc.edu (Peter G Carswell)
Date: Tue, 19 Apr 2005 10:04:15 -0400
Subject: New to Tkinter...
In-Reply-To: <opsphfvgo7rqur0o@eb.pragmadev>
References: <d431e1$9ee$1@malgudi.oar.net> <opsphfvgo7rqur0o@eb.pragmadev>
Message-ID: <d4334q$a6p$1@malgudi.oar.net>

Eric Brunel wrote:

> On Tue, 19 Apr 2005 09:35:03 -0400, Peter G Carswell <pete at osc.edu> 
> wrote:
>
>> Good Morning.
>>
>> I am new to Tkinter. I have been testing the installation of Tkinter
>> through the python web site. The first two test steps give no errors,
>> 'import _tkinter' and 'import Tkinter'. However, the third step,
>> 'Tkinter._test', gives the error:
>>     <function _test at 0xb7ec8df4>
>
>
> This is not an error. It's just the value of the _test function in the 
> Tkinter module. You don't give the URL where you found the 
> installation/test instructions, but you probably want:
>
> Tkinter._test()
>
> which *calls* the function. Tkinter._test just returns its value 
> (functions are first class objects in Python...)
>
> HTH

Thanks, I realized my beginners' error just after I emailed the 
newgroup. I am sure this won't be my last question.

pete


-- 
Peter G. Carswell   
The Ohio Supercomputer Center
pete at osc.edu
work: 614.292.1091  
fax:  614.292.XXXX
"DOC NOTE, I DISSENT. A FAST NEVER PREVENTS A FATNESS. I DIET ON COD."
-Peter Hilton



From eibrandr at gmail.com  Wed Apr 20 09:30:12 2005
From: eibrandr at gmail.com (Richard Eibrand)
Date: Wed, 20 Apr 2005 14:30:12 +0100
Subject: Python Debugger with source code tracking ability
In-Reply-To: <d52c72d205042005272e426006@mail.gmail.com>
References: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
	<d52c72d205042005272e426006@mail.gmail.com>
Message-ID: <1a8f96a00504200630654a24c9@mail.gmail.com>

On 4/20/05, Jaime Wyant <programmer.py at gmail.com> wrote:
> I haven't tried the customizations listed at the site below.  If it
> works, let me know.
> 
> http://page.sourceforge.net/tricks.html
> 
> jw
> 
> On 19 Apr 2005 19:45:05 -0700, Tran Tuan Anh <anhtt at hotmail.com> wrote:
> > Hi all,
> >
> > I am new to Python and desperated to look for a good Python debugger.
> > I mean a debugger with source coding tracking. For C/C++, emacs and
> > gud offers execellent development env. The source code tracking is
> > extremely useful for recursive functions.

You could take a look at Eclipse (http://eclipse.org/) in conjunction
with pydev (http://pydev.sourceforge.net/). Or you could take a look
at Komodo (http://www.activestate.com/Products/Komodo/) which is a
commercial product with a trial version.

Regards, 

R


From __peter__ at web.de  Wed Apr 20 02:58:55 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 20 Apr 2005 08:58:55 +0200
Subject: Array of Chars to String
References: <mailman.2133.1113942800.1799.python-list@python.org>
	<42658990.7739398@news.oz.net>
	<mailman.2139.1113953291.1799.python-list@python.org>
Message-ID: <d44uiv$it1$04$1@news.t-online.com>

Michael Spencer wrote:

> >>>?def?func_join(s,?letters):
> ...?????return?"".join(letter?for?letter?in?s?if?letter?in?set(letters))

Make that

def func_join(s, letters):
    letter_set = set(letters) 
    return?"".join(letter?for?letter?in?s?if?letter?in?letter_set)

for a fair timing of a set lookup as opposed to set creation.

Peter



From fredrik at pythonware.com  Fri Apr 22 16:51:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 22:51:39 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com><EFj8e.809$E57.495@fe51.usenetserver.com><pan.2005.04.20.10.08.25.97524@gmail.com><f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA><pan.2005.04.22.11.48.13.138980@gmail.com><pan.2005.04.22.13.22.14.591804@gmail.com><mailman.2282.1114177844.1799.python-list@python.org><pan.2005.04.22.13.56.27.343483@gmail.com><pan.2005.04.22.17.25.06.536391@gmail.com><mailman.2296.1114191795.1799.python-list@python.org>
	<pan.2005.04.22.18.02.15.156790@gmail.com>
Message-ID: <d4bns2$ksb$1@sea.gmane.org>

Willem Ligtenberg wrote:

> Since there are more than one database references possible per record you
> should get per record a list of database names, database strings and
> databases ids. (where the strings and the id's are really the same thing...)
> So per record you check for both alternatives but since there could be
> more than one, you do findall and get a (unsorted) list back.

findall returns matching elements in document order.

> And now you don't know which ID belonged to which database...

why not?  by looking at each database separately, surely you must be
able to figure out if the subelement holds an ID or a string?  sure, if you
do document.findall(".//Object-id_id"), you'll get all IDs in document
order.  but if you do record.findall(".//Dbtag"), you get a list of all Dbtag
elements, and can then look inside them to see what they contain.

> See my problem?

I'm afraid not.  the document seems to have a clear structure; for some
reason, you don't seem to take that into account in your program.

</F>



From eurleif at ecritters.biz  Sat Apr 30 04:53:40 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 30 Apr 2005 08:53:40 GMT
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <d4u60o$akh$1@news2.netvision.net.il>
References: <d4u60o$akh$1@news2.netvision.net.il>
Message-ID: <oIHce.2606$Cz3.383474@monger.newsread.com>

pythonchallenge wrote:
> For the riddles' lovers among you, you are most invited to take part
> in the Python Challenge, the first python programming riddle on the net.
> 
> You are invited to take part in it at:
> http://www.pythonchallenge.com

Very neat, I love things like this. Level 5 is maddening. Keep up the 
good work.


From fraca7 at free.fr  Thu Apr 21 06:11:16 2005
From: fraca7 at free.fr (Fraca7)
Date: Thu, 21 Apr 2005 12:11:16 +0200
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<pan.2005.04.18.18.35.12.343452@free.fr>
	<1113922995.033230.159220@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.04.21.10.11.14.672012@free.fr>

On Tue, 19 Apr 2005 08:03:15 -0700, Lucio Torre wrote:

> Do you have any experience on PODS? The whole thing is based on
> Codewarrior and Codewarrior for palm is dead.

Nope. Actually, I'm kind of reluctant to use IDEs and it seems PODS is
targeted towards Eclipse users; I'd rather use prc-tools since I'm used to
the GNU development tools.


From fredrik at pythonware.com  Mon Apr 11 03:28:29 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 09:28:29 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com><mailman.1603.1113027761.1799.python-list@python.org>	<1113121254.874488.111250@f14g2000cwb.googlegroups.com><mailman.1634.1113131893.1799.python-list@python.org>
	<42595E3D.7080301@v.loewis.de>
Message-ID: <d3d8pg$ola$1@sea.gmane.org>

Martin v. L?wis wrote:

>> if I were in charge
>
> Would you like to be?

I can help build an infrastructure that makes it easier to create a more
complete standard distribution, sure.  (and since this isn't exactly a new
idea, I'm 100% confident that I don't have to do all the work myself.)

if this is needed is something for the PSF to decide, I suppose.

</F> 





From vahmad70 at yahoo.com  Tue Apr 19 15:09:04 2005
From: vahmad70 at yahoo.com (waqar)
Date: 19 Apr 2005 12:09:04 -0700
Subject: python
Message-ID: <27b90ebf.0504191109.b4d8513@posting.google.com>

I am new to python. I need some information on following specifically:

- Background & Evolution of python
- current application areas
- future trend.

Kindly any one provide me such information or tell websites for that purpose.


From ivanlan at pauahtun.org  Thu Apr 14 11:06:08 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Thu, 14 Apr 2005 09:06:08 -0600
Subject: A little request about spam
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<425E7CB8.85DD2BA4@pauahtun.org>
	<20050414143640.GA94191@isis.sigpipe.cz>
Message-ID: <425E86E0.1F4207AE@pauahtun.org>

Hi All--

Roman Neuhauser wrote:
> 
> # ivanlan at pauahtun.org / 2005-04-14 08:22:48 -0600:
> > The listowner could turn on the [PYTHON] headers.
> 
>     I hope they don't.
> 

What's your reasoning?

> > I'm not using spambayes yet, although I'm leaning toward it, but that
> > step alone could save me some work when trying to decide based on
> > subject line alone whether or not an email is spam.  As it stands now,
> > it's too easy to decide incorrectly that "Subject: Inelegant" is a
> > spamdunk.
> 
>     Don't base your decisions (only) on subject then. Oh, and spam sent
>     through the list would have the [PYTHON] space eater too, so what
>     would it buy you?
> 

Of course I wouldn't base decisions _only_ on whether or not [PYTHON]
appears in the subject.  But I ordinarily do base decisions on the whole
subject line, and I think that's perfectly reasonable.  There's nothing
else to go on without opening the message, and for HTML-based mail
there's no surer way to let spammers know they've found a live email
addres than to open it.  You know that.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From fuzzyman at gmail.com  Tue Apr 12 10:20:28 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 12 Apr 2005 07:20:28 -0700
Subject: Northampton, UK
Message-ID: <1113315628.224648.292490@f14g2000cwb.googlegroups.com>

Just on the off chance.... I thought I'd ask if there were any
Pythoneers out there local to Northampton UK ?

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From tiissa at nonfree.fr  Thu Apr 21 14:33:03 2005
From: tiissa at nonfree.fr (tiissa)
Date: Thu, 21 Apr 2005 20:33:03 +0200
Subject: __del__ and reference count problem
In-Reply-To: <1114107504.036833.109360@z14g2000cwz.googlegroups.com>
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>
	<1114107504.036833.109360@z14g2000cwz.googlegroups.com>
Message-ID: <4267f1e0$0$8871$636a15ce@news.free.fr>

ajikoe at gmail.com wrote:
> Your problem can be simplified :
> 
> class A:
>   pop = 11
>   def __del__(self):
>     print A.pop
> 
> if __name__ == '__main__':
>   objA = A()
> 
> I got the same error message, and I don't know why ? it looks like the
> class variable can't be accessed from __del__?

It's interesting to note that self.pop instead of A.pop works as expected.
But I don't know why A.pop doesn't.


From lothar at ultimathule.nul  Tue Apr  5 12:24:05 2005
From: lothar at ultimathule.nul (lothar)
Date: Tue, 5 Apr 2005 16:24:05 -0000
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com><mailman.1279.1112602272.1799.python-list@python.org><11535p0mdgqde1@corp.supernews.com>
	<mailman.1392.1112714523.1799.python-list@python.org>
Message-ID: <1155et6khhpqu8c@corp.supernews.com>

a non-greedy match is implicitly defined in the documentation to be one such
that there is no proper substring in the return which could also match the
regex.

the documentation implies the module will return a non-greedy match.

the module does not return a non-greedy match.


"Fredrik Lundh" <fredrik at pythonware.com> wrote in message
news:mailman.1392.1112714523.1799.python-list at python.org...
> "lothar" wrote:
>
> > with respect to the documentation, the module is broken.
>
> nope.
>
> > the module does not necessarily deliver a "minimal length" match for a
> > non-greedy pattern.
>
> it isn't supposed to: a regular expression describes a *set* of matching
> strings, and the engine is free to return any string from that set.
Python's
> engine returns the *first* string it finds that belongs to the set.  if
you use
> a non-greedy operator, the engine will return the first non-greedy match
> it finds, not the overall shortest non-greedy match.
>
> if you don't want to understand how regular expressions work, don't use
> them.
>
> </F>
>
>
>





From limodou at gmail.com  Fri Apr 22 22:55:44 2005
From: limodou at gmail.com (limodou)
Date: Sat, 23 Apr 2005 10:55:44 +0800
Subject: Frog 1.4 (web log aka blogging server)
In-Reply-To: <4269535a$0$145$e4fe514c@news.xs4all.nl>
References: <4269535a$0$145$e4fe514c@news.xs4all.nl>
Message-ID: <505f13c05042219551ff8ea55@mail.gmail.com>

great!

How about change the bbcode like editor to FCKeditor? I think
FCKeditor is much better, or make it as an optional editor which the
user could select it himself.

2005/4/23, Irmen de Jong <irmen.NOSPAM at xs4all.nl>:
> I've released a new version of Frog, a web log
> aka blogging server written in 100% python.
> 
> Get version 1.4 from http://snakelets.sourceforge.net/frog/index.html
> 
> (note: storage file format has been changed since v1.3)
> 
> Some of the more interesting features are:
> 
> - multi user
> - no database needed (uses files for storage)
> - no web server needed (it runs in Snakelets,
>     which has its own web server)
> - splitted articles ("read more...")
> - email notification when comment is added
> - formatting similar to 'bbcode', supports images and other files
> - anti-spam measures: puzzles, auto-updating link blacklist,
>    anti-indexing hyperlinks in comments (rel="nofollow")
> - outputs lean xhtml+css pages
> - fully unicode compatible
> - web-based file manager, available as separate module
> 
> Have fun :)
> 
> --Irmen
> 
> PS You can see Frog in action here:
>      http://www.razorvine.net/snake/frog/user/irmen/
> --
> http://mail.python.org/mailman/listinfo/python-announce-list
> 
>         Support the Python Software Foundation:
>         http://www.python.org/psf/donations.html
> 


-- 
I like python! 
My Donews Blog: http://www.donews.net/limodou
New Google Maillist: http://groups-beta.google.com/group/python-cn


From roy at panix.com  Thu Apr  7 22:11:48 2005
From: roy at panix.com (Roy Smith)
Date: Thu, 07 Apr 2005 22:11:48 -0400
Subject: How to name Exceptions that aren't Errors
References: <3blfl8F6gt80jU1@individual.net>
Message-ID: <roy-139DDB.22114807042005@reader1.panix.com>

Leo Breebaart <leo at lspace.org> wrote:

> I've recently become rather fond of using Exceptions in Python to
> signal special conditions that aren't errors, but which I feel
> are better communicated up the call stack via the exception
> mechanism than via e.g. return values.
> 
> For instance, I'm thinking of methods such as:
> 
> 
>     def run(self):
>     """ Feed the input file to the simulator. """
> 
>         for linenr, line in enumerate(self.infile):
>             try:
>                 current_values = self.parse_line(linenr, line)
> ==>         except CommentLineException:
>                 continue
>             results = self.do_one_simulation_step(current_values)
>             self.process_simulation_results(results)

I know this isn't the question you asked, but I would have written a little 
generator function which hides the comment processing in a lower level:

def nonCommentLines (file):
    for lineNumber, line in enumerate (file):
        if not line.startswith('#'):
            yield lineNumber, line

for lineNumber, line in nonCommentLines (sys.stdin):
   current_values = self.parse_line(linenr, line)
   results = self.do_one_simulation_step(current_values)
   self.process_simulation_results(results)

This assumes you don't mind your line numbers starting from zero, but your 
version has the same behavior.

> My question is twofold. First, I know that many programmers are
> violently opposed to using exceptions in this fashion, i.e. for
> anything other than, well, exceptional circumstances. But am I
> correct in thinking that in Python this usage is actually
> considered quite normal, and not frowned upon? Is my snippet
> above indeed sufficiently Pythonic?

I think my code is clearer, but I wouldn't go so far as to say I'm 
violently opposed to your code.  I save violent opposition for really 
important matters like which text editor you use.

I suspect if you showed your code to a C++ guy, he might be violently 
opposed.  In C++, exceptions are perceived to be more heavyweight than they 
are in Python.  Some of this is just perception (perhaps colored by 
historical issues with older C++ compilers not handling exceptions well), 
some of it is real.  Just the other day, a colleague of mine was telling me 
about a bug in his code.  It happened because he had failed to write a copy 
constructor for an exception class he wrote.  The mind boggles how anybody 
can get anything useful done in a language like that.  But I digress.

In Python, exceptions seem to be the much more accepted way of doing 
things.  You often see:

try:
   value = dictionary[key]
except KeyError:
   whatever

instead of:

if dictionary.has_key (key):
   value = dictionary[key]
else:
   whatever

While in C++, the "if" version would be far more common.
 
> Second, purely as a question of aesthetics, I was wondering if
> the folks here might have any opinions about actual naming
> conventions for the exception classes used in this fashion.

If you look at the list of standard exceptions (import exceptions and do a 
dir() on it), you'll see things like KeyboardInterrupt, StopIteration, and 
SystemExit.  If the name fits, raise it.


From superprad at gmail.com  Sun Apr 24 12:00:10 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 24 Apr 2005 09:00:10 -0700
Subject: Handling lists
In-Reply-To: <mailman.2359.1114299799.1799.python-list@python.org>
References: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
	<mailman.2359.1114299799.1799.python-list@python.org>
Message-ID: <1114358410.431524.166110@z14g2000cwz.googlegroups.com>

 That helps.Thanks much.



From jlenton at gmail.com  Fri Apr 15 15:26:45 2005
From: jlenton at gmail.com (John Lenton)
Date: 15 Apr 2005 12:26:45 -0700
Subject: module placeholder
Message-ID: <1113593205.639128.197450@f14g2000cwb.googlegroups.com>

Once again I'm working on code that has several 'providers' of
different features, and I thought I'd ask the list what better
solutions it has to this other than what I've come up with.

Currently, the cleanest way I can find is to say

  import foo
  foo.config(bar='baz')
  # from this point on, foo.bar is provided by foo.bars.baz

this could be widget sets, database connectors, persistance layers,
RPC, you name it. This is very easy to do:

  # foo.py
  def config(bar_name=DEFAULT_BAR_NAME):
      global bar
      bar =  __import__('foo.' + bar_name, globals(), locals(),
bar_name)

This would work fine if people wanted to use this (once its configured)
as 'import foo; foo.bar.funkyFunction()', but no! they want to be able
to do 'from foo.bar import funkyFunction', which is reasonable really
because I'm just as lazy as they are.

So what I've come up with is

  def config(bar_name=DEFAULT_BAR_NAME):
      global bar
      barModule =  __import__('foo.' + bar_name, globals(), locals(),
bar_name)
      bar.faultFrom(barModule)

  class proxyModule(new.module):
     def faultFrom(self, other):
        self.__other = other
        self.__name__ = other.__name__
        self.__file__ = other.__file__ + ' [proxied]'
    def __getattr__(self, attr):
        return getattr(self.__other, attr)

  bar = proxyModule('bar proxy')

and this is the bit that feels ugly: is there a better way to have an
object that can be imported from a file and that behaves like a module,
but that isn't filled in until some point down the road?



From mal at egenix.com  Mon Apr  4 09:59:26 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Mon, 04 Apr 2005 15:59:26 +0200
Subject: Some notes about float approximations in mxNumber
In-Reply-To: <1112382280.714450.170380@f14g2000cwb.googlegroups.com>
References: <032720052340.23979.42474457000403FA00005DAB220699973508900A9C0E0C@comcast.net>	<mailman.1183.1112362032.1799.python-list@python.org>
	<1112382280.714450.170380@f14g2000cwb.googlegroups.com>
Message-ID: <4251483E.80608@egenix.com>

Kay Schluehr wrote:
> Hi Marc,
> 
> I was a bit surprised to find the very slow Farey approximation by
> means of the <FareyRational> class in the mxNumber package. If the goal
> was to reconstruct a rational from a float it is not a good choice and
> should be replaced by a continued fractions approximation. 

The idea was to be able to create a Rational() from a float
using a given upper bound on the denominator.

The standard Rational() constructor already provides a way
to construct a rational out of a Python or mxNumber float,
but always uses maximum precision - which may not always be
what the user wants (e.g. to work around rounding errors).

Thanks for posting your faster version. I think it would be
a good candidate for a Python Cookbook Entry and I'll
see whether I can add something like this to one of the next
mxNumber releases.

> Some time
> ago I implemented it by myself so it can be published here:
> 
> 
> def cfrac(z,bound=10**-5,n=10):
>     '''
>     creates a continued fraction from some number z.
>     @ bound - terminate cf if the rest is lower than the provided bound
>     @ n     - terminate cf after n steps
>     '''
>     l = []
>     while 1:
>         a = int(z)
>         l.append(a)
>         y = z-a
>         if y<=bound or len(l)==n:
>             return l
>         z = 1./y
> 
> 
> def fold(cf):
>     '''
>     create u/v = cfrac(a0,a1,...,an) using following rules:
> 
>     1. / u1 u0 \      / a1  1 \    / a0  1 \
>        |       |  =   |       | *  |       |
>        \ v1 v0 /      \ 1   0 /    \ 1   0 /
> 
>     2. The recursion rules
>        v(n+1) = v(n)*a(n+1)+v(n-1)
>        u(n+1) = u(n)*a(n+1)+u(n-1)
>     '''
>     if len(cf)<2:
>         return Rational(0,1)
>     un   = cf[0]*cf[1]+1
>     vn   = cf[1]
>     un_1 = cf[0]
>     vn_1 = 1
>     for a in cf[2:]:
>         b  = un
>         un = un*a+un_1
>         un_1 = b
>         b  = vn
>         vn = vn*a+vn_1
>         vn_1 = b
>     return Rational(un,vn)
> 
> 
> 
>>>>fold(cfrac(1./3))
> 
> 1/3
> 
>>>>fold(cfract(1525/42.))
> 
> 1525/42
> 
> import math
> 
> 
>>>>fold(cfract(math.sqrt(2)))
> 
> 3363/2378
> 
> 
> It is possible to provide this functionality in an even more efficient
> manner because it is usefull to bound only the approximation error of
> the rational, not the size of the continued fraction.
> 
> def float2ratio(z, bound=10**-5):
>     '''
>     convert a float into a Rational.
>     The approximation is bound by the error-limit 'bound'.
>     '''
>     a = int(z)
>     y = z-a
>     z = 1./y
>     b = int(z)
>     un   = a*b+1
>     vn   = b
>     un_1 = a
>     vn_1 = 1
>     a    = b
>     while 1:
>         y = z-a
>         if y<bound:
>             return Rational(un,vn),k
>         z = 1./y
>         a = int(z)
>         x  = un
>         un = un*a+un_1
>         un_1 = x
>         x  = vn
>         vn = vn*a+vn_1
>         vn_1 = x
>         xn = float(un)/vn
>         yn = float(un_1)/vn_1
>         if abs(xn-yn)<=bound:
>             return Rational(un,vn)
> 
> 
>>>>math.sqrt(2)
> 
> 1.4142135623730951
> 
> 
>>>>float2ratio(math.sqrt(2))
> 
> 1393/985
> 
>>>>1393./985
> 
> 1.4142131979695431
>         ^
> 
> 
>>>>float2ratio(math.sqrt(2),10**-10)
> 
> 275807/195025
> 
>>>>275807./195025
> 
> 1.4142135623637995
>             ^
> 
> 
>>>>math.pi
> 
> 3.1415926535897931
> 
> 
>>>>float2ratio(math.pi,10**-14)
> 
> 245850922/78256779
> 
>>>>245850922./78256779
> 
> 3.1415926535897931
> 
> Note that the algorithm needed only 13 iteration steps to approximate
> pi 
> in this accuracy.
> 
> Regards,
> Kay
> 

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 04 2005)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From secun at yahoo.com  Wed Apr 27 22:46:32 2005
From: secun at yahoo.com (ChrisH)
Date: Thu, 28 Apr 2005 02:46:32 GMT
Subject: pyqt and Eric 3
References: <MPG.1cda1800975d5139989680@news2.atlantic.net>
Message-ID: <MPG.1cda18ed71afddc8989681@news2.atlantic.net>

In article <MPG.1cda1800975d5139989680 at news2.atlantic.net>, 
secun at yahoo.com says...
> Are there any Eric 3 users out there?
> 
> I've been thinking about trying it.
> 
> Also, if I write scripts for internal use only at my company, do I have 
> to purchase a Qt or pyqt license?
> 
> Thanks for the info!
> Chris
> 

Oops.. I forgot to say I'm writing code for Windows.


From raoul.daruwala at gmail.com  Mon Apr 25 19:34:21 2005
From: raoul.daruwala at gmail.com (raoul)
Date: 25 Apr 2005 16:34:21 -0700
Subject: Do I need a nested lambda to do this?
Message-ID: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>

I can't figure this one out. Trying to be unnecessarily functional I
suspect.

I have the following lists.

vals = [1.000,2.344,4.2342]
tab = [((0,1),(0,3),(0,4)),
       ((2,2),(3,0),(3,9)),
       ((3,4),(6,3),(7,1))]

I'm trying to create a one liner using map/reduce/lambda/zip(* etc to
do replace the first element of each pair in each row by the the values
in vals as follows:

tab = [((1.000,1),(1.000,3),(1.000,4)),
       ((2.344,2),(2.344,0),(2.344,9)),
       ((4.2342,4),(4.2342,3),(4.2342,1))]

I'm pretty sure there's a oneline way to do this. Naturally, one could
loop mindlessly but this is my self-imposed programming challenge for
the day and I'm not feeling much love from my python.



From gnb at itga.com.au  Mon Apr 11 21:57:50 2005
From: gnb at itga.com.au (Gregory Bond)
Date: Tue, 12 Apr 2005 11:57:50 +1000
Subject: Threads and variable assignment
Message-ID: <vu9f3d.8fh.ln@lightning.itga.com.au>

I've had a solid hunt through the (2.3) documentation but it seems 
silent on this issue.

I have an problem that would naturally run as 2 threads:  One monitors a 
bunch of asyncrhonous external state and decides if things are "good" or 
"bad".  The second thread processes data, and the processing depends on 
the "good" or "bad" state at the time the data is processed.

Sort of like this:

Thread 1:

global isgood
while 1:
	wait_for_state_change()
	if new_state_is_good():
		isgood = 1
	else:
		isgood = 0

Thread 2:

s = socket(....)
s.connect(...)
f = s.makefile()
while 1:
	l = f.readline()
	if isgood:
		print >> goodfile, l
	else:
		print >> badfile, l

What guarantees (if any!) does Python make about the thread safety of 
this construct?   Is it possible for thread 2 to get an undefined 
variable if it somehow catches the microsecond when isgood is being 
updated by thread 1?


From gry at ll.mit.edu  Fri Apr 29 14:02:59 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 29 Apr 2005 11:02:59 -0700
Subject: module exports a property instead of a class -- Evil?
Message-ID: <1114797779.371054.189950@g14g2000cwa.googlegroups.com>

I often find myself wanting an instance attribute that can take on only
a few fixed symbolic values. (This is less functionality than an enum,
since there are no *numbers* associated with the values).  I do want
the thing to fiercely object to assignments or comparisons with
inappropriate values.  My implementation below gets me:

.import mode
.class C(object):
.   status = mode.Mode('started', 'done', 'on-hold')
.
.c=C()
.c.status = 'started'
.c.status = 'stated': #Exception raised
.if c.status == 'done': something
.if c.status == 'stated': #Exception raised
.if c.status.done: something  #simpler and clearer than string compare
.if c.status < 'done': something # Mode arg strings define ordering

I would appreciate comments on the overall scheme, as well as about the
somewhat sneaky (I think) exporting of a property-factory instead of a
class.  My intent is to provide a simple clear interface to the client
class ("C" above), but I don't want to do something *too* fragile or
confusing...
(I'd also welcome a better name than "Mode"...)

-------------------------- mode.py ----------------------
class _Mode:  #internal use only, not exported.
    def __init__(self, *vals):
        if [v for v in vals if not isinstance(v, str)]:
            raise ValueError, 'Mode values must be strings'
        else:
            self.values = list(vals)

    def set(self, val):
        if val not in self.values:
            raise ValueError, 'bad value for Mode: "%s"' % val
        else:
            self.state = val

    def __cmp__(self, other):
        if other in self.values:
            return cmp(self.values.index(self.state),
self.values.index(other))
        else:
            raise ValueError, 'bad value for Mode comparison'

    def __getattr__(self, name):
        if name in self.values:
            return self.state == name
        else:
            raise AttributeError, 'no such attribute: "%s"' % name


def Mode(*vals): # *function* returning a *property*, not a class.
    m = _Mode(*vals)
    def _insert_mode_get(self):
        return m
    def _insert_mode_set(self, val):
        m.set(val)
    return property(_insert_mode_get, _insert_mode_set)
-----------------------------------------------------------

Thanks,
    George



From philippe at philippecmartin.com  Mon Apr 25 15:43:07 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 25 Apr 2005 19:43:07 GMT
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<IB6be.547$m85.139@newssvr30.news.prodigy.com>
	<Ymh*8a0Mq@news.chiark.greenend.org.uk>
Message-ID: <fLbbe.273$gd5.271@newssvr12.news.prodigy.com>

Well,

At least I discovered os.uname :-)

Thanks,

Philippe


Sion Arrowsmith wrote:

> Philippe C. Martin <philippe at philippecmartin.com> wrote:
>>How about popen of 'uname -r' ?
> 
> os.uname()[2] is probably a better way (ie it doesn't spawning
> another process) of getting this information. I don't think it
> will help the original poster though (depending on *what* it is
> about FC3 which is breaking things) since it only provides the
> kernel version.
> 



From bokr at oz.net  Tue Apr 19 02:35:06 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 06:35:06 GMT
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
Message-ID: <42649c7f.321180923@news.oz.net>

On Mon, 18 Apr 2005 16:24:39 -0400, Steve Holden <steve at holdenweb.com> wrote:

>I was messing about with formatting and realized that the right kind of 
>object could quite easily tell me exactly what accesses are made to the 
>mapping in a string % mapping operation. This is a fairly well-known 
>technique, modified to tell me what keys would need to be present in any 
>mapping used with the format.
>
<snip code>
>I've been wondering whether it's possible to perform a similar analysis 
>on non-mapping-type format strings, so as to know how long a tuple to 
>provide, or whether I'd be forced to lexical analysis of the form string.
>
When I was playing with formatstring % mapping I thought it could
be useful if you could get the full format specifier info an do your own
complete formatting, even for invented format specifiers. This could be
done without breaking backwards compatibility if str.__mod__ looked for
a __format__ method on the other-wise-mapping-or-tuple-object. If found,
it would call the method, which would expect

    def __format__(self,
        ix,    # index from 0 counting  every %... format
        name,  # from %(name) or ''
        width, # from %width.prec
        prec,  # ditto
        fc,    # the format character F in %(x)F
        all    # just a copy of whatever is between % and including F
    ): ...

This would obviously let you handle non-mapping as you want, and more.

The most popular use would probably be intercepting width in  %(name)<width>s
and doing custom formatting (e.g. centering in available space) for the object
and returning the right size string.

Since ix is an integer and doesn't help find the right object without the normal
tuple, you could give your formatting object's __init__ method keyword arguments
to specify arguments for anonymous slots in the format string, conventionally
naming them a0, a1, a2 etc. Then later when you get an ix with no name, you could
write self.kw.get('%as'%ix) to get the value, as in use like
     '%(name)s %s' % Formatter(a1=thevalue) # Formatter as base class knows how to do name lookup

Or is this just idearrhea?
      
Regards,
Bengt Richter


From claird at lairds.us  Wed Apr 20 14:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 20 Apr 2005 18:08:03 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
Message-ID: <1rgij2-98r.ln1@lairds.us>

In article <d45gap$elj$1 at news.tsystems.kiev.ua>,
Maxim Kasimov  <kasimov at i.com.ua> wrote:
			.
			.
			.
>>> if you need to comment a couple of code (and then uncomment ), what 
>>> are you doing then?
>> 
>> 
>> Use comments?
>> 
>
>WOW, just greate! ... but i'd like to relax at some more interesting way
>than to comment each of rows
			.
			.
			.
Mr. Kasimov, here's another idiom you might want to consider:


        # Notice that we can make a code fragment into a string,
	# which is evaluated, then discarded.
    a = b
    c = d
    """e = f
    g = h
    i = j"""
    k = l


From ville at spammers.com  Sat Apr 23 11:04:25 2005
From: ville at spammers.com (Ville Vainio)
Date: 23 Apr 2005 18:04:25 +0300
Subject: Caching compiled regexps across sessions (was Re: Regular
	Expressions - Python vs Perl)
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
	<mailman.2289.1114190176.1799.python-list@python.org>
	<m3k6muaxmi.fsf@iny.iki.fi>
Message-ID: <du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi>

>>>>> "Ilpo" == Ilpo Nyyss?nen <iny> writes:

    >> so you picked the wrong file format for the task, and the slowest

    Ilpo> What would you recommend instead?

    Ilpo> I have searched alternatives, but somehow I still find XML
    Ilpo> the best there is. It is a standard format with standard
    Ilpo> programming API.

    Ilpo> I don't want to lose my calendar data. XML as a standard
    Ilpo> format makes it easier to convert later to some other
    Ilpo> format. As a textual format it is also readable as raw also
    Ilpo> and this eases debugging.

Use pickle, perhaps, for optimal speed and code non-ugliness. You can
always use xml as import/export format, perhaps even dumping the db to
xml at the end of each day.

    Ilpo> And my point is that the regular expression compilation can
    Ilpo> be a problem in python. The current regular expression
    Ilpo> engine is just unusable slow in short lived programs with a
    Ilpo> bit bigger amount of regexps. And fixing it should not be
    Ilpo> that hard: an easy improvement would be to add some kind of
    Ilpo> storing mechanism for the compiled regexps. Are there any
    Ilpo> reasons not to do this?

It should start life as a third-party module (perhaps written by you,
who knows :-). If it is deemed useful and clean enough, it could be
integrated w/ python proper. This is clearly something that should not
be in the python core, because the regexps themselves aren't there
either.

    >> python has shipped with a fast XML parser since 2.1, or so.

    Ilpo> With what features? validation? I really want a validating
    Ilpo> parser with a DOM interface. (Or something better than DOM,
    Ilpo> must be object oriented.)

Check out (coincidentally) Fredrik's elementtree:

http://effbot.org/zone/element-index.htm

    Ilpo> I don't want to make my programs ugly (read: use some more
    Ilpo> low level interface) and error prone (read: no validation)
    Ilpo> to make them fast.

Why don't you use external validation on the created xml? Validating
it every time sounds like way too much like Javaic B&D to be fun
anymore. Pickle should serve you well, and would probably remove about
half of your code. "Do the simplest thing that could possibly work"
and all that.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From mahs at telcopartners.com  Sat Apr  9 05:37:26 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 09 Apr 2005 02:37:26 -0700
Subject: How to check whether a  list have specific value exist or not?
In-Reply-To: <20050409093226.96954.qmail@web8402.mail.in.yahoo.com>
References: <20050409093226.96954.qmail@web8402.mail.in.yahoo.com>
Message-ID: <d387jl$4h3$1@sea.gmane.org>

praba kar wrote:
> Dear All
>      In Php we can find in_array() function
> which function is mainly useful to check
> whether a specific value is exist in the array
> or not.
> 
>    But In python In cannot find any function
> like that.  I want to check a list have specific
> value or not. So If any one know regarding this
> mail me
> 
> with regards
> PRabahar
> 
> 
> ________________________________________________________________________
> Yahoo! India Matrimony: Find your life partner online
> Go to: http://yahoo.shaadi.com/india-matrimony

No need to ask this list, ask the built-in one:

  >>> dir(list)
  ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', 
'__delslice__', '__doc__', '__eq__', '__ge__', '__getattribute__', 
'__getitem__', '__getslice__', '__gt__', '__hash__', '__iadd__', '__imul__', 
'__init__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', 
'__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', 
'__rmul__', '__setattr__', '__setitem__', '__setslice__', '__str__', 'append', 
'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']

A minute of two experimenting, would then lead you to:

  >>> l = [1,2,3,4,5]
  >>> l.index(3)
  2
  >>>

Note that all indexing in Python is 0-based

Michael



From radam2 at tampabay.rr.com  Mon Apr  4 16:02:51 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Mon, 04 Apr 2005 20:02:51 GMT
Subject: Decorator Base Class: Needs improvement.
Message-ID: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>


Hi, Thanks again for all the helping me understand the details of
decorators. 

I put together a class to create decorators that could make them a lot
easier to use.  

It still has a few glitches in it that needs to be addressed.  

(1) The test for the 'function' object needs to not test for a string
but an object type instead.  

(2) If the same decorator instance is stacked, it will get locked in a
loop.  But stacking different instances created from the same
decorator object works fine. 

(3) It has trouble if a decorator has more than one argument.
  

But I think all of these things can be fixed.  Would this be something
that could go in the builtins library? (After any issues are fixed
first of course.)

When these are stacked, they process all the prepossess's first, call
the decorator, then process all the postprocess's. It just worked out
that way, which was a nice surprise and makes this work a bit
different than the standard decorators.

Cheers,
Ron

#---start---

class Decorator(object):
    """
    Decorator - A class to make decorators with.

    self.function - name of function decorated.
    self.arglist - arguments of decorator
    self.preprocess - over ride to preprocess function arguments.
    self.postprocess - over ride to postprocess function 
						return value.
    
    Example use:
        class mydecorator(Decorate):
        def self.preprocess(self, args):
            # process args
            return args
        def self.postprocess(self, results):
            # process results
            return results

        deco = mydecorator()

        @deco
        def function(args):
            # function body
            return args
    """
    function = None
    arglist = []
    def __call__(self, arg):
        self.arglist.append(arg)        
        def _wrapper( args):
            pre_args = self.preprocess(args)
            result = self.function(pre_args)
            return self.postprocess(result)
        if 'function' in str(arg):
            self.arglist = self.arglist[:-1]
            self.function = arg
            return _wrapper
        return self            
    def preprocess(self, args):
        return args
    def postprocess(self, result):
        return result

class mydecorator(Decorater):
    def preprocess(self, args):
        args = 2*args
        return args
    def postprocess(self, args):
        args = args.upper()
        args = args + str(self.arglist[0])
        return args
deco = mydecorator()

@deco('xyz')
def foo(text):        
    return text
  
print foo('abc')


#---end---




From ckwiguno at gmail.com  Tue Apr 19 20:32:03 2005
From: ckwiguno at gmail.com (Clara)
Date: 19 Apr 2005 17:32:03 -0700
Subject: The value of the entry widget doesn't get updated
References: <ea0a4a1a.0504190736.1490276b@posting.google.com>
	<426563c7$0$20623$626a14ce@news.free.fr>
Message-ID: <1113957123.607686.135670@o13g2000cwo.googlegroups.com>

Yes that solves my problem all right...THanks a bunch to both of you



From Scott.Daniels at Acm.Org  Fri Apr  8 12:05:39 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 09:05:39 -0700
Subject: curious problem with large numbers
In-Reply-To: <mailman.1517.1112938969.1799.python-list@python.org>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>
	<mailman.1517.1112938969.1799.python-list@python.org>
Message-ID: <4256a676@nntp0.pdx.net>

Steve Holden wrote:
> Scott David Daniels wrote:
> 
>> Terry Reedy wrote:
>>
>>> On my Windows machine with 2.2.1, I get exactly what you expected:
>>>
>>>>>> 1e10000
>>>
>>> 1.#INF
>>> ...
>>> If you get wrong behavior on a later version, then a bug has been 
>>> introduced somewhere, even perhaps in VC 7, used for 2.4.
>>
>> Nope, it is also there for 2.3.4 (May 25 2004, 21:17:02)....
> 
> A further Windows data point from Cygwin:
> 
> Python 2.4 (#1, Dec  4 2004, 20:10:33)
> [GCC 3.3.3 (cygwin special)] on cygwin
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> 1e10000
> Inf
>  >>>
> 
> regards
>  Steve

Aha! Same version (2.3.4):

Idle:
     >>> 1e10000
     1.0
     >>> import struct; struct.pack('d', 1e10000)
     '\x00\x00\x00\x00\x00\x00\xf0?'
(which is actually 1.0)

python via command line (readline support):
     >>> 1e10000
     1.#INF
     >>> import struct; struct.pack('d', 1e10000)
     '\x00\x00\x00\x00\x00\x00\xf0\x7f'

Note the difference in the final byte.  Same results (command
line vs. Idle) for 2.4.1.


--Scott David Daniels
Scott.Daniels at Acm.Org


From kirk at jobsluder.net  Mon Apr 25 13:39:36 2005
From: kirk at jobsluder.net (Kirk Job Sluder)
Date: Mon, 25 Apr 2005 17:39:36 GMT
Subject: Changing a line in a text file
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
	<mailman.2435.1114423084.1799.python-list@python.org>
	<1114423528.568195.12750@l41g2000cwc.googlegroups.com>
	<mailman.2439.1114424658.1799.python-list@python.org>
Message-ID: <87y8b6ah61.fsf@debian.kirkjobsluder.is-a-geek.net>

Steve Holden <steve at holdenweb.com> writes:

> kah wrote:
> However, you asked about replacing one line with another of a
> different length: since this will mean changing the offsets of all
> subsequent bytes you have no way to do this other than writing out the
> whole content of the file following the modification. You would also
> have to ensure that you truncated the file to the correct length.
> 
> In general, although they don't make it obvious that they are doing so
> most programs that "change" files (text editors and the like) are
> really writing new copies.

In addition, I would argue that editing a file in place using a
non-interactive program is dangerous and bad practice in general.  By
the time you find a bug in your edit script, the original is lost.  This
is something I learned from bitter experience when I tried to be smart
and make script-based edits over entire directories of html files.

In unix shell scripting idiom, I would do something like:

  mv file file.bak
  sed -e 'g/oldline/c newline' < file.bak > file

And yes, I know that some versions of sed have the --in-place option.

Then, I would check for side effects:

  diff file file.bak

All of this can be done in python, however I'm not overly familiar with
difflib and it seems to require both versions of the file in memory.  So
an external diff might be better.

import os
os.rename(foo,foo.bak)
infile = open(foo.bak,'r')
outfile = open(foo,'w')
for line infile:
   #test and substitution code block
   outfile.write(line)

Using separate input and output files also has the advantage of being
memory efficient.  
    


> 
> regards
>   Steve
> -- 
> Steve Holden        +1 703 861 4237  +1 800 494 3119
> Holden Web LLC             http://www.holdenweb.com/
> Python Web Programming  http://pydish.holdenweb.com/
> 

-- 
Kirk Job-Sluder
"The square-jawed homunculi of Tommy Hilfinger ads make every day an
existential holocaust."  --Scary Go Round


From steve at holdenweb.com  Mon Apr 25 15:15:05 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 25 Apr 2005 15:15:05 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <d4jec2$20g$1@sea.gmane.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<mailman.1813.1113355346.1799.python-list@python.org>	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
	<d4jec2$20g$1@sea.gmane.org>
Message-ID: <d4jfa0$5u1$1@sea.gmane.org>

Robert Kern wrote:
> Xah Lee wrote:
> 
>> I have produced my doc.
>> ( http://xahlee.org/perl-python/python_re-write/lib/module-re.html )
>>
>> isn't there a hundred dollars due to me?
> 
> 
> No.
> 
> [Steve Holden]
> 
>>> The condition for winning the prize is that at least five regular
>>> posters to c.l.py have to mail me and saythey think your version is
>>> better.
> 
> 
... and I haven't received a single email yet. I should also point out 
that you originally said

>> paypal me a hundred dollars and i'll rewrite the whole re doc in a few
>> hours.

To which I replied

> I will personally pay you a hundred dollars if you can find enough
 > time between now and this time next week - you should be able to find
 > "a few hours" in 168 without unduly conveniencing yourself.

That offer was made on 4/12, and it's 4/25 today, so you're six days 
late. Since I don't want to be thought of as a welsher, however, the 
offer still stands despite the delay. I await five emails from regular 
c.l.py posters confirming that they think your version is better than 
the one in the documentation.

Having read it I'm not sure *why* you believe your version is better, 
but I am nevertheless impressed that you did get around to it.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From tgagne at wide-open-west.com  Tue Apr  5 23:34:25 2005
From: tgagne at wide-open-west.com (Thomas Gagne)
Date: Tue, 05 Apr 2005 23:34:25 -0400
Subject: Does IronPython indicate MS interest in dynamic languages?
In-Reply-To: <fnqbi2-p9c.ln1@lairds.us>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
	<mailman.1408.1112743462.1799.python-list@python.org>
	<fnqbi2-p9c.ln1@lairds.us>
Message-ID: <yIadneprl6oqxc7fRVn-gw@wideopenwest.com>

Cameron Laird wrote:
<snip>
> 
> And now, for something completely different, I'll tender a
> personal view:  I think Mr. Gates and Python are actually
> destined to get along uncharacteristically well.  Roughly, I
> suspect the habits and motivations of the two are so skew,
> that the usual "embrace and extend" simply won't obtain.  I
> soberly expect IronPython to work out well for both Microsoft
> and Python.

The techweb.com article said something interesting.

> "Python is an open-source dynamic language; dynamic languages enable developers to produce applications more efficiently by reducing the amount of complexity in the code they write," Jason Matusow, program manager of Microsoft's Shared Source Initiative, writes on his blog. "Microsoft's IronPython project demonstrates the benefits of putting the Python dynamic language on the .NET Common Language Runtime."

Assuming (I don't know for certain) that MS's PR approves all messages 
that leave the building, I'm wondering if this foray into dynamic 
languages doesn't signal something greater on MS' part.  While Sun and 
Java (and C# for the most part) have remained statically-typed, do you 
think IronPython might indicate a new direction for MS language development?


From megahrtz at gte.net  Tue Apr 12 12:50:38 2005
From: megahrtz at gte.net (Alex Nordhus)
Date: Tue, 12 Apr 2005 11:50:38 -0500
Subject: "The C++ part of the .. Has been deleted, wsTaskBarIcon
Message-ID: <000001c53f7f$c15951e0$6400a8c0@grondor>


I need some help. I cant seem to get rid of this error.

I can program a button that will exit the program and remove the icon in
the taskbar, but I have to tie it to OnTaskBarClose.

OnExit and OnCloseWindow do nothing and leave the icon in the taskbar, I
think I have tried every option, when you double click the icon it gives
you the error.

Traceback (most recent call last):
  File "D:/Python24/simple.py", line 43, in OnTaskBarActivate
    self.Show(true)
  File "D:\Python24\Lib\site-packages\wx-2.5.4-msw-unicode\wx\_core.py",
line 11263, in __getattr__
    raise PyDeadObjectError(self.attrStr % self._name)
wx._core.PyDeadObjectError: The C++ part of the MyFrame object has been
deleted, attribute access no longer allowed.

When the program runs, you can right click on the icon in the taskbar
and close and it works.
I hardcoded the file > Exit button to do the same thing and that works
too.
However if you click the top right X to just close the window, or on
close that's when the error happens.

How do I get the close to work properly from the default window? I have
been on this same thing for days. Any help would be greatly appreciated.

Heres the code, also attaching it.


from wxPython.wx import *
import sys
import os
ID_ABOUT = 101
ID_EXIT  = 102

class MyFrame(wxFrame):
    def __init__(self, NULL, ID, title):
        wxFrame.__init__(self, NULL, ID, title,
                         wxDefaultPosition, wxSize(200, 150))
        self.CreateStatusBar()
        self.SetStatusText("This is the statusbar")

        menu = wxMenu()
        menu.Append(ID_ABOUT, "&About",
                    "More information about this program")
        menu.AppendSeparator()
        menu.Append(ID_EXIT, "E&xit", "Terminate the program")

        menuBar = wxMenuBar()
        menuBar.Append(menu, "&File");

        self.SetMenuBar(menuBar)

        EVT_MENU(self, ID_ABOUT, self.OnAbout)
        EVT_MENU(self, ID_EXIT,  self.OnTaskBarClose)
                # make the TaskBar icon
        self.tbIcon = wxTaskBarIcon()
        # FIX ME WITH your Icon
        icon = wxIcon('small.ico', wxBITMAP_TYPE_ICO)
        self.tbIcon.SetIcon(icon, "It Doesnt work!")
        EVT_TASKBAR_LEFT_DCLICK(self.tbIcon, self.OnTaskBarActivate)
        EVT_TASKBAR_RIGHT_UP(self.tbIcon, self.OnTaskBarMenu)
        EVT_MENU(self.tbIcon, self.TBMENU_CLOSE, self.OnTaskBarClose)
        EVT_ICONIZE(self, self.OnIconify)

    def OnIconify(self, evt):
        self.Hide()

    def OnTaskBarActivate(self, event):
        self.Show(true)
        
    TBMENU_CLOSE   = 1001
        
    def OnTaskBarMenu(self, event):
        menu = wxMenu()
        menu.Append(self.TBMENU_CLOSE,   "Close")
        self.tbIcon.PopupMenu(menu)
        menu.Destroy()

    def OnOK(self, event):
        self.Show(false)

    def OnExit(self, event):
        del self.tbIcon
        sys.exit()
	
    def OnCloseWindow(self, event):
        del self.tbIcon
        sys.exit()

    def OnTaskBarClose(self, event):
        del self.tbIcon
        sys.exit()

    def OnAbout(self, event):
        dlg = wxMessageDialog(self, "This sample program shows off\n"
                              "frames, menus, statusbars, and this\n"
                              "message dialog.",
                              "About Me", wxOK | wxICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()


    def TimeToQuit(self, event):
        self.Destroy()

class MyApp(wxApp):
    def OnInit(self):
        frame = MyFrame(NULL, -1, "Hello from wxPython")
        frame.Show(true)
        self.SetTopWindow(frame)
        return true


app = MyApp(0)
app.MainLoop()


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From martin.witte at gmail.com  Tue Apr  5 15:26:42 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 5 Apr 2005 12:26:42 -0700
Subject: os.path query functions behavior incorrect?
In-Reply-To: <YNy4e.25743$k66.11680@trnddc03>
References: <YNy4e.25743$k66.11680@trnddc03>
Message-ID: <1112729202.724140.319860@z14g2000cwz.googlegroups.com>

It works fine under linux
martin at ubuntu:~ $ python
Python 2.3.4 (#2, Feb  2 2005, 11:10:56)
[GCC 3.3.4 (Debian 1:3.3.4-9ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os.path
>>> os.path.exists('/blah')
False
>>> os.path.isdir('/blah')
False
>>> os.path.isdir('/home/martin')
True
>>> os.path.exists('/home/martin')
True
>>>



From codecraig at gmail.com  Thu Apr 21 09:48:44 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 06:48:44 -0700
Subject: python classes/file structure
Message-ID: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>

What is the best/common way to structure ur python code for an
application?

For example...if I create some custom GUI widgets I have this

C:\stuff
    --> gui
        --: MyCustomWidget.py
    --: TestWidgets.py

so MyCustomWidget.py has one class, class MyCustomWidget: ...

so from TestWidgets.py i have to do this

from gui import *

widget = gui.MyCustomWidget.MyCustomWidge()

...seems weird, how should I structure this?  Is it not common to have
one class in a .py?

thanks



From nemesis at nowhere.invalid  Tue Apr 12 16:11:44 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Tue, 12 Apr 2005 20:11:44 GMT
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<20050411194907.1769.17472.XPN@orion.homeinvalid>
	<425AF2FD.2080006@v.loewis.de>
Message-ID: <20050412191956.1706.59231.XPN@orion.homeinvalid>

Mentre io pensavo ad una intro simpatica "Martin v. L?wis" scriveva:

>> What happens if I try to install Python2.4 on a system wich doesn't have
>> the dll?
> It will just work. Python installs the DLL if it is missing, and leaves
> it alone (just incrementing the refcount) if it is present on the target
> system.

OK, so the python installer _does_ ship this dll. So also the win
installer has the redistribution problem, or does they pay for
redistributing msvcr71.dll? 

-- 
Computers follow your orders, not your intentions.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From kasimov at i.com.ua  Wed Apr 20 07:00:57 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 14:00:57 +0300
Subject: goto statement
In-Reply-To: <mailman.2159.1113989175.1799.python-list@python.org>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
Message-ID: <d45cun$ec3$1@news.tsystems.kiev.ua>

Mage wrote:
> praba kar wrote:
> 
> 
>>Dear All,
>>
>>  In Python what is equivalent to goto statement
>>
>> 
>>
> 
> You shouldn't use goto in high-level languages.

it would be quite useful for debuging porposes


-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From gsakkis at rutgers.edu  Sat Apr  9 00:52:50 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 8 Apr 2005 21:52:50 -0700
Subject: Python Equivalent to Java Interfaces?
References: <d37kmc$lrp$1@news-int2.gatech.edu>
Message-ID: <1113022370.851748.51160@f14g2000cwb.googlegroups.com>

"Brian Kazian" wrote:

> I want to insure that all subclasses implement a certain method, but
could
> not find anything that would do this for me.  Is there anyway in
Python to
> implement this check?  Thanks!


Check out PyProtocols (http://peak.telecommunity.com/PyProtocols.html).
Protocols in a way extend (no pun intended) typical interfaces by
giving more flexibility to independent components to talk to each
other.

George



From ksenia.marasanova at gmail.com  Sun Apr 10 11:55:06 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Sun, 10 Apr 2005 17:55:06 +0200
Subject: templating system
Message-ID: <130df19305041008552621549c@mail.gmail.com>

Hi,

I am looking for fast, simple templating system that will allow me to
do the following:
- embed Python code (or some templating code) in the template
- generate text output (not only XML/HTML)

I don't need a framework (already have it), but just simple
templating. The syntax I had in mind is something like that:

# in Python module
def some_view():
    # some code goes here...
    records = get_some_data()
    req = get_request_class()
    return template('some_template.tmpl', **locals()).render()

# in some_template.tmpl:

<ul>
<%for record in records%>
    <li><a href="<%=record.id%>"><%=record.title%></a></li>
<%end for%>
</ul>


>From what I saw Cheetah seems to be the only one that can do it. I was
hoping there might be alternatives that I've missed :)
Thanks!

-- 
Ksenia


From peter at engcorp.com  Fri Apr  1 12:43:20 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 01 Apr 2005 12:43:20 -0500
Subject: Pseudocode in the wikipedia
In-Reply-To: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>
Message-ID: <r-mdneTvL9M6FdDfRVn-ug@powergate.ca>

bearophileHUGS at lycos.com wrote:
> (Further, Python has the baggage that there are no block-terminators:
> i.e., no "}" or "end"s or "fi"s or "repeat"s. By adding such
> terminators, we can make it a lot less ambiguous to all readers.) In
> otherwords, we're basically right on track: removing the quirks of
> Python, and making it higher-level.

Heh heh... good joke for April 1.

Clearly, calling the absence of something "baggage"
is intended to be humorous...

-Peter


From dcrespo at gmail.com  Mon Apr 25 11:56:23 2005
From: dcrespo at gmail.com (dcrespo)
Date: 25 Apr 2005 08:56:23 -0700
Subject: PyGTK vs. wxPython
Message-ID: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>

Hi all...

I think wxPython is much better than PyGTK. First of all, PyGTK needs
the GTK runtime installed, whereas wxPython is entirely Python's
modules, so It facilitates the apps' distribution. Also, PyGTK uses
specific controls or widgets of GTK, while wxPython uses native
controls of the platform where the app is running.

I'm learning both, but at a slow step, so I want to know all the
comments about this subject in this group.

I heard about Glade to make the graphic layout of the app and then
export it as XML. Then, it connects to PyGTK. The problem I see is that
What if you want to refer to a state of a specific radiobutton of a
radobutton's group? It seems to be very troublesome.

Please, post any comments about the pros and cons of each library, and
the proper way to construct the graphic layout (generating XML through
Glade, or by hand-code). Thanks.

Daniel



From aisaac0 at verizon.net  Wed Apr 27 18:56:12 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Wed, 27 Apr 2005 22:56:12 GMT
Subject: mbx repair script
Message-ID: <gMUbe.2502$iZ1.2213@trnddc03>

I'm looking for a Python script to repair the mbx header
for a mail file where only the header is corrupted.

Thanks,
Alan Isaac




From eucci.group at gmail.com  Thu Apr 21 15:26:50 2005
From: eucci.group at gmail.com (Jeff Shell)
Date: 21 Apr 2005 12:26:50 -0700
Subject: Persistent python object and the Web
In-Reply-To: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
References: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
Message-ID: <1114111609.946834.253480@o13g2000cwo.googlegroups.com>

The ZODB (Zope's object database, which can be downloaded and installed
separately from Zope) and Durus (part of the Quixote family, I believe)
are both high quality persistent Python object stores that are used
heavily for web sites.

I've never used the ZODB outside of Zope, and haven't used Durus yet.
But there may be some examples written up about how to use them with
mod_python.

You *might* even be served by the built-in 'shelve' module.
http://docs.python.org/lib/module-shelve.html



From cam.ac.uk at mh391.invalid  Mon Apr 25 13:54:51 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 25 Apr 2005 18:54:51 +0100
Subject: Python, Perl & PDF files
In-Reply-To: <ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
Message-ID: <d4jath$jpp$1@gemini.csx.cam.ac.uk>

Christos TZOTZIOY Georgiou wrote:

> [0] there's an ancient myth about a peasant's cart getting stuck in the
> mud, so the peasant starts calling out for help from goddess Athena.
> Another peasant passing by tells him: "Syn Athena kai kheira kinei",
> which means, more or less, "keep on calling Athena, but start also using
> your hands."
> I don't know any related myth of anglo-saxon origin to quote.

A man prays to God, very hard for a winning lottery ticket. He tells God 
that he will use most of the money to do good works. Some he will use to 
make life better for his family. He keeps praying and praying. He never 
wins the lottery.

One day he is so angry, he goes to church and rants and raves to God 
about not winning the lottery. Finally God comes and says to him "You 
have to buy a ticket my son, for me to help you."
-- 
Michael Hoffman


From Barron.Snyder at wholefoods.com  Tue Apr 19 11:52:47 2005
From: Barron.Snyder at wholefoods.com (Barron Snyder (MW MWC))
Date: Tue, 19 Apr 2005 10:52:47 -0500
Subject: ANN: Python 2.3.2 for PalmOS available
Message-ID: <D33F61953C681B4FA2B6D37A6E5BF6CB6F9C0D@wfm-exchprd1.wfm.pvt>


Isn't ** used for exponents? 
>>>4**2

-----Original Message-----
Sent: Tuesday, April 19, 2005 10:39 AM 
By: RM
To: python-list at python.org
Subject: Re: ANN: Python 2.3.2 for PalmOS available

I get odd results when trying to use exponents.  For example:

>>>4^2
6

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


From peufeu at free.fr  Tue Apr 12 15:10:36 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 21:10:36 +0200
Subject: ATTN : Georges ( gry@ll.mit.edu)
References: <d5178$425c1076$43461874$1508@nf1.news-service.com>
Message-ID: <op.so4vjyveqfv3if@localhost>



> My code so far:
> # -*- coding: iso-8859-1 -*-
> import sys
> import os
> from progadn import *
>
> ab1seq = raw_input("Entrez le r?pertoire o? sont les fichiers ?  
> analyser: ") or None

	Ce serait mieux d'utiliser sys.argv pour sp?cifier le r?pertoire dans la  
ligne de commande du programme :
import sys
help(sys.argv)

> if ab1seq == None :
>     print "Erreur: Pas de r?pertoire! \n" \
> "\nAu revoir \n"
>     sys.exit()

je propose :

import os, os.path, sys

def usage():
	print "documentation..."
	sys.exit(-1)


args = sys.argv[1:]

if not args:
	usage()

files = []
for path in args:
	if os.path.isfile( path ):
		files.append( path )
	elif os.path.isdir( path ):
		files.extend( [os.path.join( path, fname ) for fname in os.listdir( path  
)] )
	else:
		print "%s n'est ni un fichier ni un r?pertoire..." % path
		usage()

files = [ fname for fname in files if fname.endswith( ".Seq" ) ]
88
if not files:
	print "Aucun fichier a traiter."
	usage()

print "Fichier ? traiter :"
print ", ".join( files )

for path in files:
	print path
	checkDNA( open( path ).read() )

> def checkDNA(seq):
>     """Retourne une liste des caract?res non conformes ? l'IUPAC."""
>
>     junk=[]
>     for c in range (len(seq)):
>         if seq[c] not in iupac:
>             junk.append([seq[c],c])
>             #print junk
>             print "ATTN: Il y a le caract?re %s en position %s " %  
> (seq[c],c)
>         if junk == []:
>              indinv=range(len(seq))
>              indinv.reverse()
>              resultat=""
>              for i in indinv:
>                  resultat +=comp[seq[i]]
>              return resultat

	Je r??cris un peu votre fonction d'une mani?re plus "python", ? placer  
dans le programme avant son appel bien s?r !

def checkDNA( seq ):
	seq = seq.strip()
	if not seq:
		print "Fichier vide."
		return
	resultat = []
	for i,c in enumerate(seq):
		try:
			resultat.append( comp[c] )
		except KeyError:
			print "Catact?re <%s> en position <%d> invalide" % (c,i)
	resultat.reverse()
	return ''.join( resultat )
			


>
> seq=checkDNA(seq)
>
> -------------------------------------------------------------------------------------------------------------------------
>
> Path:  
> news3!feeder.news-service.com!news.glorb.com!postnews.google.com!o13g2000cwo.googlegroups.com!not-for-mail
> From: gry at ll.mit.edu
> Newsgroups: comp.lang.python
> Subject: Re: problem with the logic of read files
> Date: 12 Apr 2005 10:47:17 -0700
> Organization: http://groups.google.com
> Lines: 104
2> Message-ID: <1113328037.070319.136110 at o13g2000cwo.googlegroups.com>
> References: <68da8$425bf954$43461874$29054 at nf1.news-service.com>
> NNTP-Posting-Host: 129.55.200.20
> Mime-Version: 1.0
> Content-Type: text/plain; charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
> X-Trace: posting.google.com 1113328069 32347 127.0.0.1 (12 Apr 2005  
> 17:47:49 GMT)
> X-Complaints-To: groups-abuse at google.com
> NNTP-Posting-Date: Tue, 12 Apr 2005 17:47:49 +0000 (UTC)
> In-Reply-To: <68da8$425bf954$43461874$29054 at nf1.news-service.com>
> User-Agent: G2/0.2
> Complaints-To: groups-abuse at google.com
> Injection-Info: o13g2000cwo.googlegroups.com; posting-host=129.55.200.20;
>    posting-account=tzIXbQwAAACT3z3X4eITVLtksgiDRxhx
> Xref: news-x2.support.nl comp.lang.python:438583
>
>
> <m_t... at yahoo.com> wrote:
>> I am new to python and I am not in computer science. In fact I am a
> biologist and I ma trying to learn python. So if someone can help me, I
> will appreciate it.
>> Thanks
>>
>>
>> #!/cbi/prg/python/current/bin/python
>> # -*- coding: iso-8859-1 -*-
>> import sys
>> import os
>> from progadn import *
>>
>> ab1seq =3D raw_input("Entrez le r=E9pertoire o=F9 sont les fichiers =E0
> analyser: ") or None
>> if ab1seq =3D=3D None :
>>     print "Erreur: Pas de r=E9pertoire! \n"
>> "\nAu revoir \n"
>>     sys.exit()
>>
>> listrep =3D os.listdir(ab1seq)
>> #print listrep
>>
>> extseq=3D[]
>>
>> for f in listrep:
> ###### Minor -- this is better said as:  if f.endswith(".Seq"):
>>      if f[-4:]=3D=3D".Seq":
>>          extseq.append(f)
>> #         print extseq
>>
>> for x in extseq:
>>      f =3D open(x, "r")
> ###### seq=3D... discards previous data and refers only to that just
> read.
> ###### It would be simplest to process each file as it is read:
> @@@@@@ seq=3Df.read()
> @@@@@@ checkDNA(seq)
>>      seq=3Df.read()
>>      f.close()
>>      s=3Dseq
>>
>> def checkDNA(seq):
>>     """Retourne une liste des caract=E8res non conformes =E0
> l'IUPAC."""
>>
>>     junk=3D[]
>>     for c in range (len(seq)):
>>         if seq[c] not in iupac:
>>             junk.append([seq[c],c])
>>             #print junk
>>             print "ATTN: Il y a le caract=E8re %s en position %s " %
> (seq[c],c)
>>         if junk =3D=3D []:
>>              indinv=3Drange(len(seq))
>>              indinv.reverse()
>>              resultat=3D""
>>              for i in indinv:
>>                  resultat +=3Dcomp[seq[i]]
>>              return resultat
>>
>> seq=3DcheckDNA(seq)
>> print seq
>
> ##### The program segment you posted did not define "comp" or "iupac",
> ##### so it's a little hard to guess how it's supposed to work.  It
> would
> ##### be helpful if you gave a concise description of what you want the
>
> ##### program to do, as well as brief sample of input data.
> ##### I hope this helps!  -- George
>>
>> #I got the following ( as you see only one file is proceed by the
> function even if more files is in extseq
>>
>> ['B1-11_win3F_B04_04.ab1.Seq']
>> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq']
>> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
> 'B1-18_win3F_D04_08.ab1.Seq']
>> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
> 'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq']
>> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
> 'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq',
> 'B1-19_win3F_F04_12.ab1.Seq']
>> ..
>> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
> 'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq',
> 'B1-19_win3F_F04_12.ab1.Seq', 'B1-19_win3R_G04_14.ab1.Seq',
> 'B90_win3F_H04_16.ab1.Seq', 'B90_win3R_A05_01.ab1.Seq',
> 'DL2-11_win3F_H03_15.ab1.Seq', 'DL2-11_win3R_A04_02.ab1.Seq',
> 'DL2-12_win3F_F03_11.ab1.Seq', 'DL2-12_win3R_G03_13.ab1.Seq',
> 'M7757_win3F_B05_03.ab1.Seq', 'M7757_win3R_C05_05.ab1.Seq',
> 'M7759_win3F_D05_07.ab1.Seq', 'M7759_win3R_E05_09.ab1.Seq',
> 'TCR700-114_win3F_H05_15.ab1.Seq', 'TCR700-114_win3R_A06_02.ab1.Seq',
> 'TRC666-100_win3F_F05_11.ab1.Seq', 'TRC666-100_win3R_G05_13.ab1.Seq']
>>
>> after this listing my programs proceed only the last element of this
> listing (TRC666-100_win3R_G05_13.ab1.Seq)
>>
>>
> NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTCCCGAAGTGTCCCAGAGCAAATAAATGGACCAAAACGTTTTTAG=
> NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTCCCGAAGTGTCCCAGAGCAAATAAATGGACCAAAACGTTTTTAG=
> AATACTTGAACGTGTAATCTCATTTTAA
>
>
>
> **********End Of Post*************
>
>
>
>



From rbt at athop1.ath.vt.edu  Tue Apr 19 16:50:24 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 19 Apr 2005 16:50:24 -0400
Subject: Array of Chars to String
In-Reply-To: <mailman.2133.1113942800.1799.python-list@python.org>
References: <mailman.2133.1113942800.1799.python-list@python.org>
Message-ID: <d43qug$nnl$1@solaris.cc.vt.edu>

James Stroud wrote:
> Hello,
> 
> I am looking for a nice way to take only those charachters from a string that 
> are in another string and make a new string:
> 
> 
>>>>astr = "Bob Carol Ted Alice"
>>>>letters = "adB"
>>>>some_func(astr,letters)
> 
> "Bad"

astr = "Bob Carol Ted Alice"
letters = "adB"
both = [x for x in astr if x in letters]
print both

 >>>
['B', 'a', 'd']
 >>>


From vegeta.z at gmail.com  Tue Apr  5 11:03:17 2005
From: vegeta.z at gmail.com (vegetax)
Date: Tue, 05 Apr 2005 11:03:17 -0400
Subject: Python Google Server
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<mailman.1375.1112701816.1799.python-list@python.org>
	<1112706994.922193.5610@z14g2000cwz.googlegroups.com>
Message-ID: <d2u97r$oit$1@sea.gmane.org>

Fuzzyman wrote:


> Add the follwoing two lines to the start of the code :
> 
> import urllib2
> txheaders = { 'User-agent' : 'Mozilla/4.0 (compatible; MSIE 6.0;
> Windows NT 5.1; SV1; .NET CLR 1.1.4322)' }
> 
> Then change the start of the send_head method to this :
> 
>     def send_head(self):
>         """Only GET implemented for this.
>         This sends the response code and MIME headers.
>         Return value is a file object, or None.
>         """
>         print 'Request :', self.path # traceback to sys.stdout
>         url_tuple = urlparse.urlparse(self.path)
>         url = url_tuple[2]
>         domain = url_tuple[1]
>         if domain.find('.google.') != -1:   # bypass the cache for
> google domains
>             req = urllib2.Request(self.path, None, txheaders)
>             return urllib2.urlopen(req)


Doesnt work,the browsers keeps asking me to save the page.

this one works =)

>>  def send_head(self):
    print 'Request :', self.path #| traceback| to| sys.stdout
    url_tuple = urlparse.urlparse(self.path)
    url = url_tuple[2]
    domain = url_tuple[1]
    if domain.find('.google.') != -1: # bypass the cache for google domains
        req = urllib2.Request(self.path, None, txheaders)
        self.send_response(200)
        self.send_header("Content-type", 'text/html')
        self.end_headers()
        return urllib2.urlopen(req)
>>  dotloc = url.rfind('.') + 1





From leo at lspace.org  Thu Apr  7 17:20:19 2005
From: leo at lspace.org (Leo Breebaart)
Date: 7 Apr 2005 21:20:19 GMT
Subject: How to name Exceptions that aren't Errors
References: <3blfl8F6gt80jU1@individual.net> <_8-dnTyvubKUBMjfRVn-3Q@is.co.za>
Message-ID: <3blmgjF6gh1egU1@individual.net>

Max <rabkin at mweb[DOT]co[DOT]za> writes:

> LOOK EVERYONE, it's Leo Breebart. You are the same Leo
> Breebart, right?

Breeb*aa*rt. But otherwise, yeah -- I do frequent more than just
one newsgroup. :-)


> This guys famous in the alternative universe of
> alt.fan.pratchett.

I doubt anybody here cares! Who was it that said: "On the
Internet, everyone's famous to fifteen other people"...?

Anyways, regardless of any feeble claims to notoriety I may have
in alternate universes, here in Python country I am but a humble
grasshopper wot has only been programming in Python for slightly
over a year now.

*Dutch* grasshopper, though. Does that help any?

-- 
Leo Breebaart  <leo at lspace.org>


From wp at tekran.spammenziemichnichtdankeschon.com  Tue Apr  5 09:29:02 2005
From: wp at tekran.spammenziemichnichtdankeschon.com (Warren Postma)
Date: Tue, 05 Apr 2005 09:29:02 -0400
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
In-Reply-To: <1112456559.835048@yasure>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net> <1112456559.835048@yasure>
Message-ID: <Apw4e.4369$6k4.445730@news20.bellglobal.com>

Donn Cave wrote:
> 
> That's an odd thing to say.  Poetry is verbose, florid?
> Python is Dutch.

Ha. I'm vaguely dutch, whatever that means.

I would say if there is a sister word for "Programming" in the english 
language, it isn't Poetry and it surely isn't Prose. It's Dialectic.
I appreciate the idea of "Code Poetry", and I find more than a few 
coders out there with more than a rudimentary appreciation of Poetry as 
well, but I don't like the analogy. No slight to Poetry is intended. 
Rather, I intend it as a compliment. Code has an almost entirely 
practical purpose, Malbol et al excluded. Poetry, except in cases of 
extraordinarily bad poetry, may have little "practical" purpose.

Now dialectic. I like that word. And I think the art of programming is 
somewhere in the Late-Medeival period right now. From Merriam Webster, 
meanings 1,5,6 seem rather sympathetic to texts used in the creation of 
software:

Dialectic

1. LOGIC
5.  Any systematic reasoning, exposition, or argument that juxtaposes 
opposed or contradictory ideas and usually seeks to resolve their 
conflict/an intellectual exchange of ideas
6 : the dialectical tension or opposition between two interacting forces 
or elements

One way to look at Code is as a textual abstraction of a design. Having 
been flattened from brain-space into a two dimension matrix of latin 
glyphs, certain semantic/meta-data is typically omitted. Thus a 
classical programming problem in many languages: The "Write-only-code" 
syndrom. You wrote it, it runs, but you're afraid even to touch it 
yourself.  Python is stronger than other languages I have used.  When I 
go back to Python code I've written long enough ago to have forgotten 
everything about, I am more able to pick it up and work with it than I 
am with other less agile languages. I'm not merely talking about 
pedantic details of literal code-readability, I'm talking about the 
ability to intuit design from implementation, and the orthogonality of 
the design of the system to the to the faculty of human reason. (In not 
so many words: Python fits my brain.)

Warren



From cam.ac.uk at mh391.invalid  Thu Apr 28 20:44:30 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 29 Apr 2005 01:44:30 +0100
Subject: Best way to parse file into db-type layout?
In-Reply-To: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
Message-ID: <d4s01i$fbh$1@gemini.csx.cam.ac.uk>

Peter A. Schott wrote:

> I've got a file that seems to come across more like a dictionary from what I can
> tell.  Something like the following format:
> 
> ###,1,val_1,2,val_2,3,val_3,5,val_5,10,val_10
> ###,1,val_1,2,val_2,3,val_3,5,val_5,11,val_11,25,val_25,967,val_967

Peter, I'm not sure exactly what you want. Perhaps a dictionary for each
row in the file? Where the first row would result in:

{"letter_type": "###", 1: "val_1", 2: "val_2", 3: "val_3", 5: "val_5",
10: "val_10"}

Something like this:

import csv
import fileinput

row_dicts = []
for row in csv.reader(fileinput.input()):
     row_dict = dict(letter_type=row[0])

     for col_index in xrange(1, len(row), 2):
         row_dict[int(row[col_index])] = row[col_index+1]

     row_dicts.append(row_dict)

Someone else might come up with something more elegant.
-- 
Michael Hoffman


From bokr at oz.net  Mon Apr 11 01:44:11 2005
From: bokr at oz.net (Bengt Richter)
Date: Mon, 11 Apr 2005 05:44:11 GMT
Subject: Doubt regarding sorting functions
References: <mailman.1663.1113195016.1799.python-list@python.org>
Message-ID: <425a0c44.78988539@news.oz.net>

On Mon, 11 Apr 2005 05:50:11 +0100 (BST), praba kar <prabapython at yahoo.co.in> wrote:

>Dear All,
>
>          I am new to Python.  I am in need of
>some sorting functions (eg) numerical sorting
>functions and alphapetical sorting functions. 
>I have searched through net But I cannot
>find any regarding this so If anyone know
>regarding this. Kindly mail me as early as possible
>
>with regards
>PRabahr

Frankly, your claim to has "searched through the net" is not believable,
unless you are not using a search engine such as google, in which case
go to google.com (assuming you know how to do that) and type in something
like

    sorting site:python.org

and press enter. The "site:python.org" will limit the search to
what is available on the python.org site, which has a high concentration
of Python-relevant information.

Perhaps this will help someone avoid a seemingly helpless or lazy post like yours.

BTW, a request to "mail me as early as possible" is more likely
to get favorable consideration if you explain why you can't
monitor the newsgroup postings for a reply.

Regards,
Bengt Richter


From mahs at telcopartners.com  Sun Apr 24 19:35:08 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 24 Apr 2005 16:35:08 -0700
Subject: How to "generalize" a function?
In-Reply-To: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
References: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
Message-ID: <d4ha4b$qss$1@sea.gmane.org>

Thomas K?llmann wrote:
> Hi, everybody!
> 
> I'm teaching myself Python, and I have no experience in programming
> apart from some years of shell scripting. So, please bear with me.
> 
> These two funktions are part of an administrative script I've set
> myself as a first lesson, and, as you will see, they're practically the same,
> except for one variable. So I'd like to weld them together -- but I
> can't find out how to.
> 
> def writeIP(ip):
>     """ IP schreiben """
>     regex = re.compile('(.*)address(.*)')

This is the only difference between the functions, isn't it?
So, instead of hardwiring 'address' or 'netmask' into the regexp template, you 
should insert it based on an argument passed to the function.  String 
interpolation works well here: e.g.,
  >>> '(.*)%s(.*)' % 'netmask'
  '(.*)netmask(.*)'
  >>>

>     confFile = open(networkConf, 'r')
>     conf = confFile.readlines()
>     confFile.close

Note, here you presumably mean confFile.close() i.e., you must supply the parens 
to call the function.


[snip]
> 
> I feel it should be possible to use something like
> 
> def writeFile(ip,keyword):
>     ...
> 

Indeed.  Use keyword as the argument to the string interpolation
  >>> regex = re.compile('(.*)%s(.*)' % keyword)

> but how would I construct expressions like
> 
>     netmaskLineNum = conf.index(netmaskLine)
> 

I think these should work unchanged.  But it would be easier to read if you 
changed these names to be neutral to the application e.g., instead of 
netmaskLine, foundLine

HTH

Michael



From claird at lairds.us  Tue Apr 26 20:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 27 Apr 2005 00:08:03 GMT
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu> <d4j91s$bfp$1@solaris.cc.vt.edu>
	<tsd2k2-ed4.ln1@lairds.us> <d4m9hl$8br$1@solaris.cc.vt.edu>
Message-ID: <diu2k2-6l3.ln1@lairds.us>

In article <d4m9hl$8br$1 at solaris.cc.vt.edu>,
rbt  <rbt at athop1.ath.vt.edu> wrote:
			.
			.
			.
>Read and search them for strings. If I could do that on windows, linux 
>and mac with the *same* bit of Python code, I'd be very happy ;)

Textual content, right?  Without regard to font funniness, or
whether the string is in or out of a table, and so on?

'Might be a few days before I answer; I'm crashing into end-of-
the-month deadlines.


From martin at v.loewis.de  Fri Apr  1 00:34:09 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 01 Apr 2005 07:34:09 +0200
Subject: Problem with national characters
In-Reply-To: <MmW2e.4463$SL4.89670@news4.e.nsc.no>
References: <MmW2e.4463$SL4.89670@news4.e.nsc.no>
Message-ID: <424cdd51$0$21909$9b622d9e@news.freenet.de>

Leif B. Kristensen wrote:
> Is there a way around this problem? My character set in Linux is
> ISO-8859-1. In Windows 2000 it should be the equivavent Latin-1, though
> I'm not sure about which character set the command shell is using.

You need to do locale.setlocale(locale.LC_ALL, "") to get
locale-specific upper-casing.

Notice that things are more difficult in the Windows terminal window,
as this uses an encoding different from the one that the system's
locale functions expect.

Regards,
Martin


From bogus@does.not.exist.com  Mon Apr  4 11:45:01 2005
From: bogus@does.not.exist.com ()
Date: Mon, 04 Apr 2005 15:45:01 -0000
Subject: (no subject)
Message-ID: <mailman.7.1572215338.3356.python-list@python.org>

#! rnews 2776
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!central.cox.net!east.cox.net!filt02.cox.net!peer01.cox.net!cox.net!attga1!attga2!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: unittest vs py.test?
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
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References: <roy-428D85.21040831032005 at reader1.panix.com> <6I-dnbpiIZJNJNPfRVn-hA at powergate.ca> <6oQ3e.10378$db.6219 at trndny07> <Sd6dnU9B46Le38zfRVn-uA at powergate.ca> <d2rigf$sjj$1 at panix2.panix.com>
Mime-Version: 1.0
Date: Mon, 4 Apr 2005 15:30:36 GMT
Xref: news.xs4all.nl comp.lang.python:370744

roy at panix.com (Roy Smith) writes:

> Peter Hansen  <peter at engcorp.com> wrote:
> >It seems possible to me that I might have helped him
> >solely by pointing out that unittest might not be so
> >"heavy" as some people claimed.  I got the impression
> >that he might be swayed by some unfounded claims not
> >even to look further at unittest, which I felt would
> >be a bad thing.
> 
> I'm the "him" referred to above.  I've been using unittest ever since
> it was first added to the standard library (actually, now that I think
> about it, I believe I may have been using it even before then).
> 
> And yes, I think unittest brings along a certain amount of baggage.
> There is something attractive about having the same basic framework
> work in many languages (PyUnit, JUnit, C++Unit, etc), but on the other
> hand, it does add ballast.  I use it, I certainly don't hate it, but
> on the other hand, there are enough things annoying about it that it's
> worth investing the effort to explore alternatives.
> 
> From the few days I've been playing with py.test, I think I like what
> I see, but it's got other issues.  The "optimization elides assert"
> issue we've been talking about is one.
> 
> It's also neat that I can write unittest-style test classes or go the
> simplier route of just writing static test functions, but there's a
> certain amount of TIMTOWTDI (did I spell that right?) smell to that.
> 
> I'm also finding the very terse default output from unittest (basicly
> a bunch of dots followed by "all N tests passed") highly preferable to
> py.test's verbosity.
> 
> In short, I haven't made up my mind yet, but I do appreciate the input
> I've gotten.
> 
> 

I haven't used pytest, so no comparisons to offer.  But for unittest,
I've found a lot of the "baggage" can be automated.  My mkpythonproj
(http://www.seanet.com/~hgg9140/comp/index.html#L006) does that.  When
you generate a project, you get a unittest suite with a default test
ready to run, and the mechanisms needed to add more.


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From ishpeck at gmail.com  Wed Apr 27 10:05:36 2005
From: ishpeck at gmail.com (Ishpeck)
Date: 27 Apr 2005 07:05:36 -0700
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <1114608598.571508.6570@z14g2000cwz.googlegroups.com>


monkey wrote:
> Read through python site for programming tool, really plenty of
choices :-)
> (For c++, I just can't breath with very very limited choices)
>
> Tried Spe, it come with wxGlade built-in very nice(is Spe still
actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for
Eclipse)
> also worth looking. Actually which one are you guys using? and why? I
think
> it is also valuable for those who are new to python as me.



From ndbecker2 at verizon.net  Fri Apr  8 12:52:40 2005
From: ndbecker2 at verizon.net (Neal Becker)
Date: Fri, 8 Apr 2005 16:52:40 +0000 (UTC)
Subject: redirect stdout
Message-ID: <loom.20050408T184916-520@post.gmane.org>

I'd like to build a module that would redirect stdout to send it to a logging 
module.  I want to be able to use a python module that expects to print 
results using "print" or "sys.stdout.write()" and without modifying that 
module, be able to redirect it's stdout to a logger which will send the 
messages via datagrams to a server. 
 
Any ideas? 



From deetsNOSPAM at web.de  Sun Apr 24 10:20:16 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 24 Apr 2005 16:20:16 +0200
Subject: Question on metaclasses
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
Message-ID: <d4g9v1$oi8$05$1@news.t-online.com>

Steffen Gl?ckselig wrote:

> Hello,
> 
> I've been experimenting with metaclasses a bit (even though I am quite
> a newbie to python) and stumpled over the following problem in my code:
> 
> class Meta(type):
>   def __init__(cls, name, bases, dct):
>     for attr, value in dct.items():
>       if callable(value):
>         dct[attr] = wrapper(value)
> 
> wrapper adds debugging-information to methods of the class (at least
> that is my plan).
> 
> Using dct[attr] = wrapper(value) does not result in wrapped methods,
> though. Using setattr(cls, attr, wrapper(value)) creates the desired
> effect, though.
> 
> Why are the changes to dct not visible in the instantiated class? Is
> dct not the namespace of the class currently instantiated?

You don't use metaclasses correctly I believe. Usage should look like this:

class Foo(type):
    def __new__(cls, name, bases, dict):

        for k,v in [(k, v) for k,v in dict.items() if callable(v)]:
            cls.wrap(k,v,cls.get_directives(v), dict)

        return super(Foo, self).__new__(self, name, bases, dict)

Notice the __new__ instead of __init__, and the call to (actually, through
super) type.__new__

-- 
Regards,

Diez B. Roggisch


From ahaas at airmail.net  Thu Apr 28 09:52:05 2005
From: ahaas at airmail.net (Art Haas)
Date: Thu, 28 Apr 2005 08:52:05 -0500
Subject: [ANNOUNCE] Twenty-fourth release of PythonCAD now available
Message-ID: <20050428135205.GS11497@artsapartment.org>


I'm pleased to announce the twenty-fourth development release of PythonCAD,
a CAD package for open-source software users. As the name implies,
PythonCAD is written entirely in Python. The goal of this project is
to create a fully scriptable drafting program that will match and eventually
exceed features found in commercial CAD software. PythonCAD is released
under the GNU Public License (GPL).

PythonCAD requires Python 2.2 or newer. The interface is GTK 2.0
based, and uses the PyGTK module for interfacing to GTK. The design of
PythonCAD is built around the idea of separating the interface
from the back end as much as possible. By doing this, it is hoped
that both GNOME and KDE interfaces can be added to PythonCAD through
usage of the appropriate Python module. Addition of other PythonCAD 
interfaces will depend on the availability of a Python module for that
particular interface and developer interest and action.

The twenty-fourth release contains numerous improvements to the code
used for constructing the user interface and the entity drawing routines.
This release utilizes the GTK Action and ActionGroup classes for building
and controlling the menubar and menus. Using these classes greatly simplifies
and enhances the ability to manipulate the menu items, and these features
are used extensively in this release. Many menu choices are now activated
when the functionality they provide can be used, and deactivated when their
use is not possible. More enhancements of this nature will be appearing in
future releases. Another significant improvement is the refactoring of the
entity drawing routines. These routines are now provided as methods for each
entity class, making their usage much clearer and simpler. Changing the
drawing routines has allowed significant simplification of the code
responsible for drawing as well as fixing several drawing bugs. Future
releases of PythonCAD will build on this change to enhance and improve the
graphical behavior of the program even further. A number of PyGTK deprecation
warnings that slipped by in the previous release have been removed, and a
good number of bug fixes and code enhancements are present in this release
as well.

A mailing list for the development and use of PythonCAD is available.
Visit the following page for information about subscribing and viewing
the mailing list archive:

http://mail.python.org/mailman/listinfo/pythoncad

Visit the PythonCAD web site for more information about what PythonCAD
does and aims to be:

http://www.pythoncad.org/

Come and join me in developing PythonCAD into a world class drafting
program!

Art Haas
-- 
Man once surrendering his reason, has no remaining guard against absurdities
the most monstrous, and like a ship without rudder, is the sport of every wind.

-Thomas Jefferson to James Smith, 1822


From monocalibro at yahoo.com  Thu Apr 14 03:16:03 2005
From: monocalibro at yahoo.com (monocalibro)
Date: Thu, 14 Apr 2005 12:16:03 +0500
Subject: need help in PySparse
Message-ID: <4260bcfe@x-privat.org>

Hello all!
I need ready-for-use installable version of PySparse (for FiPy), because I
can't compile it with MingW. Or, may be, somebody knows step-by-step
instruction to complie this package under Win32 using Mingw?
Best regards




From steve at holdenweb.com  Sat Apr 30 09:31:47 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 30 Apr 2005 09:31:47 -0400
Subject: Can .py be complied?
In-Reply-To: <ll71peja.fsf@pobox.com>
References: <426ec8f7_2@rain.i-cable.com>	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>	<d4qsmj$5gr$1@domitilla.aioe.org>
	<d4tk6l$hb3$1@sea.gmane.org> <ll71peja.fsf@pobox.com>
Message-ID: <d5010r$pgf$1@sea.gmane.org>

John J. Lee wrote:
> Steve Holden <steve at holdenweb.com> writes:
> [...]
> 
>>There's nothing wrong with open source projects catering to a market,
>>and there's nothing wrong with running open source software on a
>>proprietary operating system. To behave otherwise might reduce the
>>growth opportunities for Python and its community.
>>
>>no-zealotry-please-ly y'rs  - steve
> 
> [...]
> 
> I'm hesitant to label everybody who disagrees with you (and me) on
> that a zealot.  Though I tend to take the same side you do, I'm not
> entirely sure it's not just laziness on my part that I think that way.
> 
> Seems to me that holding opinions such as "it's a bad thing to support
> open source software on closed source systems, and you should not do
> it, for the common good" is far from crazy, even though I don't
> currently happen to hold that view.
> 
Well, we appear to agree. Please note I wasn't labelling anyone a 
zealot, simply implying that I didn't want the discussion to descend to 
blind repetitions of principle with no supporting arguments.

I have no problem with others taking a different view from mine on this 
issue, though I reserve the right to disagree with them. My own view is 
that open source (Python included) wouldn't be anywhere near as advanced 
and popular as it is if it hadn't been ported to the majority platform, 
and that this actually positions it better for eventual world domination 
:-). There's a reason Microsoft are fighting Linux with FUD.

Let's also not forget that at PyCon, (I am told) when Jim Hugunin asked 
for a show of hands as to who principally developed for Windows 
platforms, *Guido* raised his hand.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fumanchu at amor.org  Tue Apr 12 13:11:39 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 12 Apr 2005 10:11:39 -0700
Subject: [perl-python] Python documentation moronicities (continued)
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E339876F@exchange.hqamor.amorhq.net>

His vitriol should at least warrant a temporary ban. No money need
change hands.


Top-posting-because-it-wasn't-worth-quoting,

Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


> -----Original Message-----
> From: python-list-bounces+fumanchu=amor.org at python.org 
> [mailto:python-list-bounces+fumanchu=amor.org at python.org] On 
> Behalf Of Richie Hindle
> Sent: Tuesday, April 12, 2005 4:10 AM
> To: python-list at python.org
> Subject: Re: [perl-python] Python documentation moronicities 
> (continued)
> 
> 
> 
> [Xah]
> > motherfucking ... fucking ... fucking ... fucking ... fuck 
> ... fucking
> > fucking ... fucking ... mother fucking ... fucking ... 
> piece of shit ...
> > motherfucking ... fucking ... fucking ... big asshole ... 
> masturbation ...
> > Fucking morons ... fucking stupid ... fuckhead coders ... 
> fuckheads ...
> > you fucking asses.
> 
> > paypal me a hundred dollars and i'll rewrite the whole re 
> doc in a few
> > hours.
> 
> Can we paypal you a hundred dollars to leave us alone?  I'll 
> pledge $10.
> Are there another nine people here who'll do the same?
> 
> -- 
> Richie Hindle
> richie at entrian.com
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


From steve at holdenweb.com  Wed Apr 13 18:21:05 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 18:21:05 -0400
Subject: smtplib does not send to all recipients
In-Reply-To: <1113421803.445281.3660@l41g2000cwc.googlegroups.com>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>	<mailman.1715.1113251652.1799.python-list@python.org>
	<1113421803.445281.3660@l41g2000cwc.googlegroups.com>
Message-ID: <425D9B51.5080804@holdenweb.com>

dccarson at gmail.com wrote:
> That seems reasonable.  However, using the 'mail' utility I can deliver
> the same mail successfully.  I assume mail is using sendmail under the
> covers, which is doing the same negotiation with the same SMTP server?
> 
The facts would appear to suggest that both sources are accepted by the 
local SMTP server - as long as you are positive both chains are indeed 
contacting the same server. Ethereal could show you this.

A possible scenario would be that the downstream SMTP chain is somehow 
discriminating against the Python-originated messages. Logs should give 
evidence here.

So, unless it's a simple typo and you are using different (email or SMTP 
server) addresses that you think are the same, see my original response, 
which included

> and you need to take the matter up with whoever runs the SMTP server. Are you sure the address is actually valid? 

Evidence for and against? These things are a pain, but with patience you 
can usually track them down. You could try explaining to a stuffed toy, 
or a sock on your hand, exactly why there can't be anything wrong with 
your code. My wife's bears are very forbearing [n.p.i.]. Whatever it 
takes to break the perceptual barrier.

We now return you to your regular episode of scheduled tasks ...

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From rtw at freenet.co.uk  Sat Apr  2 05:10:43 2005
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Sat, 02 Apr 2005 04:10:43 -0600
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1223.1112417955.1799.python-list@python.org>
Message-ID: <Xns962C71BC2E3rtwfreenetREMOVEcouk@216.196.109.145>

Tim Peters wrote in news:mailman.1223.1112417955.1799.python-
list at python.org in comp.lang.python:

> [Paul Rubin]
>> I'd like to have a function (or other callable object) that returns
>> 0, 1, 2, etc. on repeated calls.  That is:
>>
>>    print f()   # prints 0
>>    print f()   # prints 1
>>    print f()   # prints 2
>>    # etc.
>>
>> There should never be any possibility of any number getting returned
>> twice, or getting skipped over, even if f is being called from
>> multiple threads.
>> 
>> What's the simplest and most natural way to do this?  I can think of a
>> few but am not sure that they work.  And I can think of some ways that
>> are sure to work, but are messier than I'd like.
> 
> The GIL is your friend here:
> 

Yes but IIUC the GIL is only CPython, will this work with Jython,
IornPython etc ? (*)

>     import itertools
>     f = itertools.count().next
> 

*) I'm either being rhetorical or stupid, not sure which :).

Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From nw_moriarty at yahoo.com  Mon Apr 18 18:32:56 2005
From: nw_moriarty at yahoo.com (nw_moriarty at yahoo.com)
Date: 18 Apr 2005 15:32:56 -0700
Subject: strange error in socket.py
Message-ID: <1113863576.931976.222330@l41g2000cwc.googlegroups.com>

Folks

I'm getting a very strange error when I'm using the SocketServer.  Has
anybody got any ideas?

Nigel

  File
"/scratch1/nigel/c6/phenix-1.08a/build/intel-linux/python/lib/python2.4/SocketServer.py",
line 468, in process_request_thread
  File
"/scratch1/nigel/c6/phenix-1.08a/build/intel-linux/python/lib/python2.4/SocketServer.py",
line 378, in close_request
  File
"/scratch1/nigel/c6/phenix-1.08a/build/intel-linux/python/lib/python2.4/socket.py",
line 164, in close
exceptions.AttributeError: 'NoneType' object has no attribute 'write'
Unhandled exception in thread started by
Error in sys.excepthook:

Original exception was:



From davidf at sjsoft.com  Wed Apr  6 14:59:11 2005
From: davidf at sjsoft.com (David Fraser)
Date: Wed, 06 Apr 2005 20:59:11 +0200
Subject: Installing Python 2.4 on Linux
In-Reply-To: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
Message-ID: <d31anp$16t$1@ctb-nnrp2.saix.net>

Edward Diener wrote:
> I can install Python 2.4 on the Fedora 3 Linux system, but after I do a 
> number of Linux utilities and commands, like yum, stop working because 
> they were dependent on the Python 2.3 installation. What happens is that 
> Python 2.4 replaces the /usr/bin/python module with the Python 2.4 
> version. If I replace /usr/bin/python with the Python 2.3 version 
> executable, which is still on my system, that all the aforesaid modules 
> depend on, they start working again, but I can no longer execute 
> modules, like IDLE, which was part of my Python 2.4 distribution.
> 
> What is the solution to this ? The operating system was installed with 
> Python 2.3 and the development libraries but no tools, doc, or 
> otherwise. I have installed Python 2.4 with all the RPMs and copied down 
> the Python 2.4 documentation to my machine ( since python24-docs.rpm 
> gives one very little ). I would naturally like to use Python 2.4 
> without killing all the commands that depend on Python 2.3. No doubt 
> these commands have their modules in the site libraries for Python 2.3. 
> Of course I would love to update these dependencies to use Python 2.4 
> but newer RPMs for these commands do not exist.
> 
> I do not know whether this is a Python problem or a Fedora 3 problem but 
> I thought I would ask here first and see if anybody else had the same 
> problem. I imagine the problem might exist on other Linux systems.

Actually the Fedora RPMS supplied on the Python website are fine:
http://www.python.org/2.4.1/rpms.html
Quoting from that page:
> # Q) Is it safe to install these RPMs on a Red Hat system? Will they over-write the system python and cause problems with other Red Hat applications that expect a different version of Python?
> # A) The RPMs that start with "python2.4" are built to not interfere with the system Python. They install as "/usr/bin/python2.4" and will not conflict with the system Python unless you are running on a system that ships the a version of Python which has the same major/minor number.
> 
> To invoke the interpreter with these packages, you will explicitly have to run "python2.4". Note that all Python RPMs provided by Python.org and Red Hat provide a "/usr/bin/python2.4" (or similar, with major/minor number), even if they also provide "/usr/bin/python". So, yes, it should be safe.
> 
> Note that you may need to build and install a second copy of any packages which you need access to with the supplemental version of Python. You can build packages of these files for the Python 2.4 interpreters for packages which use Distutils, by using the command "python2.4 setup.py bdist_rpm". 

This is by far the preferred way to install a different version of 
Python to the default version provided with a distribution, as you don't 
then conflict with packages that require the default version.

Also, it is better to do it like this using real packages than to rename 
files manually. I have used the above successfully on Fedora Core 3 (and 
other similar versions on other distro versions), if it doesn't work for 
you there is a source RPM available to rebuild from

Hope that helps
David


From __peter__ at web.de  Fri Apr 22 11:30:21 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 22 Apr 2005 17:30:21 +0200
Subject: Problem deriving a class from the built-in file  object
References: <ay7ae.22073$Jg5.1129820@news20.bellglobal.com>
Message-ID: <d4b59q$js6$04$1@news.t-online.com>

Pierre Rouleau wrote:

> I'm trying to extend the functionality of the file object by creating a
> class that derives from file.??MyFile?class?re-implements?__init__(),
> write(), writelines() and close() to augment the capabilities of file.
> 
> All works fine, except for one thing:??'print?>>?myfile'??does?not
> execute Myfile.write(), it executes the file.write().???If?I?execute
> myfile.write() explicitly, then Myfile.write() is called as expected.

As a workaround, you can use delegation instead of inheritance:

>>> class File(object):
...     def __init__(self, *args):
...             self.file = file(*args)
...     def __getattr__(self, name):
...             return getattr(self.file, name)
...     def write(self, s):
...             print "writing", s
...             self.file.write(s)
...
>>> f = File("tmp.txt", "w")
>>> for s in ["alpha", "beta", "gamma"]:
...     print >> f, s
...
writing alpha
writing

writing beta
writing

writing gamma
writing

>>> f.close()
>>> File("tmp.txt").read()
'alpha\nbeta\ngamma\n'
 
> I was not expecting that behaviour.??I?though?that?'print?>>?afileobject
> ' would execute the afileobject.write() as you can easily obtain by
> defining a simple file-like class that implements write() and writeline().
> 
> I am running Python 2.3.4.??Can't?move?to?2.4?yet.

Nothing has changed with 2.4 in that respect.
 
> Is it the expected behavior?

I certainly didn't expect it either when I saw it for the first time.

Peter



From gsakkis at rutgers.edu  Sat Apr  9 06:49:19 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 9 Apr 2005 03:49:19 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
	<mailman.1596.1113015264.1799.python-list@python.org>
	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>
	<mailman.1607.1113039130.1799.python-list@python.org>
Message-ID: <1113043759.765568.9920@o13g2000cwo.googlegroups.com>

"Michael Spencer" <mahs at telcopartners.com> wrote:
>
> George,
>
> since you explicit allowed metaprogramming hacks :-), how about
something like
> this (not tested beyond what you see):
>
> [snipped]
>

Nice try, but ideally all boilerplate classes would rather be avoided
(at least being written explicitly). Also, it is not obvious in your
solution why and which placeholder classes have to be written (like
World2.Movable) and which do not. By the way, my current working
solution involves copying and pasting verbatim these classes :-) Below
is an abstracted example; note that the 'declaration string' of each
original class is exactly the same across all different versions after
the first (e.g. "class B(PreviousNamespace.B, A)").


#======================================================
# version_1.py

class Namespace:
    class A(object):
        def foo(self): return "version_1.foo()"
    class B(A):
        def bar(self): return "version_1.bar()"
    class C(B):
        def zen(self): return "version_1.zen()"
#======================================================
# version_2.py

from version_1 import Namespace as PreviousNamespace
class Namespace(PreviousNamespace):
    class A(PreviousNamespace.A):
        def foo(self): return "version_2.foo()"
    class B(PreviousNamespace.B, A):
        pass
    class C(PreviousNamespace.C, B):
        pass
#======================================================
# version_3.py

from version_2 import Namespace as PreviousNamespace
class Namespace(PreviousNamespace):
    class A(PreviousNamespace.A):
        pass
    class B(PreviousNamespace.B, A):
        def bar(self): return "version_3.bar()"
    class C(PreviousNamespace.C, B):
        pass

#======================================================
# test.py
# command: python test.py <#version>

def NamespaceFactory(version):
    return __import__("version_%d" % version).Namespace

print NamespaceFactory(2).B().foo() # "version_2.foo()"
print NamespaceFactory(3).C().bar() # "version_3.bar()"

import sys, inspect
namespace = NamespaceFactory(int(sys.argv[1]))
# print the __mro__ of each 'inner' class
for name,cls in inspect.getmembers(namespace,
                                   inspect.isclass):
    print cls
    for ancestor in cls.__mro__:
        print "\t", ancestor

#======================================================

George



From gh at ghaering.de  Thu Apr 21 19:36:41 2005
From: gh at ghaering.de (Gerhard Haering)
Date: Fri, 22 Apr 2005 01:36:41 +0200
Subject: [ANN] pysqlite 2.0.alpha3
In-Reply-To: <20050421233432.GA15825@mylene.ghaering.de>
References: <20050421233432.GA15825@mylene.ghaering.de>
Message-ID: <20050421233641.GA15865@mylene.ghaering.de>

On Fri, Apr 22, 2005 at 01:34:32AM +0200, Gerhard Haering wrote:
> ===================
> pysqlite 2.0.alpha3
> ===================
> 
> I'm glad to announce pysqlite 2.0.alpha3, which will be the last alpha
> release.  Documentation and more testing will be what I'm concentrating
> on in the beta test phase, so here's the explanation of the new features
> within the change log.
> 
> Download it from Sourceforge:
>     http://sourceforge.net/project/showfiles.php?group_id=54058
> [...]

Forgot the pysqlite homepage: http://pysqlite.org/ with Wiki, BugTracker
and Subversion repository.

-- Gerhard
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From quasara at earthlink.net  Fri Apr 29 08:20:53 2005
From: quasara at earthlink.net (sheltech)
Date: Fri, 29 Apr 2005 12:20:53 GMT
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
Message-ID: <FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>


"MC05" <smokerdude66 at myway.com> wrote in message
news:3dc8hjF6s5i2uU1 at individual.net...
>
> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
> >
> > 4) I doubt seriously whether God plays a guitar, since guitars are made
by
> > men, for men.  His Son could theoretically play a guitar.  Perhaps He
> > does. Perhaps He doesn't.  Only the Father and His Holy Angels know.
>
> So then Lucifer was a wicked bass player whose sex and drugs and rock n
roll
> alientated the rest of the band and was fired?
>
>
>

"Fired" ....  good one





From __peter__ at web.de  Thu Apr 28 03:05:06 2005
From: __peter__ at web.de (Peter Otten)
Date: Thu, 28 Apr 2005 09:05:06 +0200
Subject: List comprehension and FieldStorage
References: <1114552736.288675.248070@g14g2000cwa.googlegroups.com>
	<1114624635.234561.96390@o13g2000cwo.googlegroups.com>
Message-ID: <d4q1u8$9af$05$1@news.t-online.com>

Derek Basch wrote:

> print [(key, value) for key, value in form.keys() and form[key].value]

and

> bump

The tutorial is always willing to make time for you :-)

>>> import cgi
>>> fs = cgi.FieldStorage(environ=dict(QUERY_STRING="alpha=1&beta=2"))
>>> [(key, fs[key].value) for key in fs.keys()]
[('alpha', '1'), ('beta', '2')]

So you might have come up yourself with the above in the mean time. 
However, it breaks if there are multiple occurrences of the same key:

>>> fs =
cgi.FieldStorage(environ=dict(QUERY_STRING="alpha=1&beta=2&alpha=3"))
>>> [(key, fs[key].value) for key in fs.keys()]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'list' object has no attribute 'value'

A quick glance in the source suggests that

>>> [(mfs.name, mfs.value) for mfs in fs.list]
[('alpha', '1'), ('beta', '2'), ('alpha', '3')]

is a bit more robust. But perhaps you can get hold of the original unparsed
query string and avoid the detour via FieldStorage altogether?

Peter



From codecraig at gmail.com  Fri Apr 22 08:19:12 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 05:19:12 -0700
Subject: __init__.py question
Message-ID: <1114172352.208471.158410@o13g2000cwo.googlegroups.com>

Ok,  I have the following directory structure

C:\pycode
   --> blah.py
   --> mynewdir
      --> __init__.py
      --> abc.py

[[ C:\pycode\mynewdir\abc.py ]]

def doFoo():
    print "hi"

def doBar():
    print "bye"

[[ C:\pycode\mynewdir\__init__.py ]]

from mynewdir import *

[[ C:\pycode\blah.py ]]

????

what do i import in blah.py so that I can accesss, abc.doFoo() ?

thanks



From http  Wed Apr 13 17:54:48 2005
From: http (Paul Rubin)
Date: 13 Apr 2005 14:54:48 -0700
Subject: Newbie Tkinter Question
References: <425d9284$0$572$ed2e19e4@ptn-nntp-reader04.plus.net>
Message-ID: <7xfyxu8hqv.fsf@ruckus.brouhaha.com>

"Pseud O'Nym" <notexpletivedeleteduk at notyahoo.co.uk> writes:
> class App:
>   def __init__(self, master):
>     frame = Frame(master)
>     frame.pack(side=LEFT, fill=Y)
>     image1 = PhotoImage(file='button_a.gif')
>     self.button = Button(frame, image=image1)
>     self.button.pack(side=TOP)
> 
> Can anyone enlighten me?

You do have this inside a frame whose main loop is running, I hope?


From jerf at jerf.org  Mon Apr  4 19:26:29 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Mon, 04 Apr 2005 18:26:29 -0500
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <878y3y6ts4.fsf@pobox.com>
Message-ID: <pan.2005.04.04.23.26.28.468507@jerf.org>

On Mon, 04 Apr 2005 22:50:35 +0000, John J. Lee wrote:
> What I don't understand about py.test (and trying it out seems
> unlikely to answer this) is why it uses the assert statement.
> unittest used to do that, too, but then it was pointed out that that
> breaks when python -O is used, so unittest switched to self.assert_
> &c.  Does py.test have some way around that?

"Don't use -O because it doesn't do anything significant?"

Is this an issue in practice? (Honest question.) If -O did something
interesting I might use it, but I don't think it does. 




From garz at tmft.net  Fri Apr 22 20:13:47 2005
From: garz at tmft.net (Markus Wintermann)
Date: Sat, 23 Apr 2005 02:13:47 +0200
Subject: c-extension crashes unexpected
In-Reply-To: <vnki61d2dcdehlcj852v06e7iu5flt3t3k@4ax.com>
References: <f791a214.0504220637.63492afd@posting.google.com>
	<vnki61d2dcdehlcj852v06e7iu5flt3t3k@4ax.com>
Message-ID: <3cti95F6nmi80U1@news.dfncis.de>

John Machin schrieb:

> ...
>
> Some suggestions:
> 
> 1. Try Pyrex. You get to write in a higher-level language and it does
> all the boring ugly error-prone stuff for you -- this includes
> reference counting as well! Look at the C code that Pyrex generates,
> to see what Pyrex is saving you from.
> 2. If you still insist on DIY, look at some of the Python source code
> in the Modules and Objects directories to see how it is done.
> 3. Examine carefully the book or whatever you have been learning from.
> If it doesn't cover topics like always checking for errors, throw it
> in the garbage bin (and tell the world via this newsgroup). If it does
> cover such topics but you've been ignoring it, well then, it's up to
> you what you do next :-)
> 
> HTH,
> John

many thanks.

it works now, but i?ll try to do the whole thing with pyrex.
because i?m not so familiar with error handling.
i tried to write this with some tutorials and there is always written
something like:
"i know it?s no nice style to have no errorhandling but for excercise
purpose that?s not necessary."
and i never know what to add.
luckily now the good pyrex will do this for me,
if i get it to work.


From zarnovican at pobox.sk  Wed Apr  6 08:39:36 2005
From: zarnovican at pobox.sk (Brano Zarnovican)
Date: 6 Apr 2005 05:39:36 -0700
Subject: ignoring keywords on func. call
References: <1112787673.095411.266170@o13g2000cwo.googlegroups.com>
	<mailman.1424.1112788617.1799.python-list@python.org>
Message-ID: <1112791176.258876.200160@o13g2000cwo.googlegroups.com>

> > Q: Can you call 'f' with keywords that will be
> >  ignored, without changing 'f's definition ?
>
> no.

OK. Thank you for an answer.

> what's the use case?

I have extended the dict class, so that my __getitem__ accepts an
optional parameter

class MyTree(dict):

  def __getitem__(self, key, **k):
    ..

  def lookup(self, seq):
    node = self
    for k in seq:
      node = node.__getitem__(k, someoption=True)

lookup takes a sequence of keys to lookup in hierarchy
of Tree nodes. But I would like lookup to work also on objects
that are not subclasses of Tree. It has to work on any dict-like class.

If a user defines a custom class, he will intuitively define
__getitem__
like this:

def MyNode(??):
  def __getitem__(self, key):
    ..

I could check in 'lookup'

  if isinstance(node, Tree):
      node = node.__getitem__(k, someoption=True)
  else:
      node = node.__getitem__(k)

But it still doesn't guarantee that __getitem__ accepts keywords.
(What if somebody will extend the Tree class and overlook the
definition of __getitem__ and define a "classic" one)

BranoZ



From fredrik at pythonware.com  Thu Apr 14 07:49:22 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 14 Apr 2005 13:49:22 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<425e47a9$0$26352$db0fefd9@news.zen.co.uk>
Message-ID: <d3ll5p$mj3$1@sea.gmane.org>

Will McGugan wrote:

> Please implement this as a Python module. I would like to compress my mp3 collection to single 
> bits.

here's the magic algorithm (somewhat simplified):

def algorithm(data):
    m = 102021 # magic constant
    d = [int(c) for c in str(1*2*3*4*5*m+5+4+2+1)]
    x = [ord(c) for c in hex(1+2+4+5+m*5*4*3*2*1)]
    x[d[0]*d[1]*d[2]] = x[d[-1]] + sum(d) - d[d[-d[-1]-1]] + d[0]
    x = __import__("".join(chr(c) for c in x[d[0]*d[1]:])).encodestring
    return "".join(x(data).split("\n")).rstrip("="), sum(d)-sum(reversed(d))

and here's a driver for your MP3 collection:

import glob

def compress(filename):
    data = open(filename, "rb").read()
    keycode, bit = algorithm(data)
    file = open(keycode + ".out", "wb")
    file.write(chr(bit))
    file.close()
    print "compressed", filename,
    print len(data), "=>", 1, round(100.0/len(data), 3), "%"

for file in glob.glob("*.mp3"):
    compress(file)

</F> 





From peufeu at free.fr  Tue Apr 12 17:54:22 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 23:54:22 +0200
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
	<mailman.1684.1113228968.1799.python-list@python.org>
	<1113333625.215786.198580@l41g2000cwc.googlegroups.com>
	<1113339252.851450.184620@z14g2000cwz.googlegroups.com>
Message-ID: <op.so424whjqfv3if@localhost>


> It's not a bug if you didn't RTFM.

	I did read it in much detail !

	In fact I spent a lot of time trying to make understand how it could do a  
simple 4-table join to display also purchased products on an online store.  
The damn query took 0.5 seconds to execute no matter how I twisted it in  
and out !
	Postgres did it in 0.5 milliseconds.
	I had to split the query in two in the application !

	Speaking of the manual, the mysql manual is quite... well... i don't  
quite find the word, but it has many sentences which sound like PR stuff.  
Like, we don't do this like you or anyone would expect, but there is a  
reason ! Embrace our school of thought, stop worrying about integrity  !  
Peace, my friend, etc. And the non-working examples posted in the user  
comments are nice to look at, too. The organization of the manual is a  
mess, too, it's often quite difficult to find what I seek. The postgres  
manual is just wonderful.

	I know I'm feeding the flamewar, but I can't resist, once I came up on a  
post on the mysql website from a guy basically saying "wow, the fulltext  
is so powerful, I can search this document set in only half a second !"  
and then the same day, on the postgres mailinglist, there was a message  
 from a guy who was really upset because his full text search on something  
like 1000 times bigger would take more than one tenth a second, and that  
wan't really acceptable for him, and then several competent people  
responded and helped him make it work.

	That's also why I want to use postgres.



From beliavsky at aol.com  Wed Apr 20 09:33:17 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 20 Apr 2005 06:33:17 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
Message-ID: <1114003997.778676.144950@z14g2000cwz.googlegroups.com>

Terry Hancock wrote:

<snip>

> So I like Python's slicing because it "bites *less*" than intervals
in C or Fortran.

I disagree. Programming languages should not needlessly surprise
people, and a newbie to Python probably expects that x[1:3] =
[x[1],x[2],x[3]] . Array-oriented languages, such as Fortran 90/95,
Matlab/Octave/Scilab, and S-Plus/R do not follow the Python convention,
and I don't know of Fortran or R programmers who complain (don't follow
Matlab enough to say). There are Python programmers, such as the OP and
me, who don't like the Python convention. What languages besides Python
use the Python slicing convention?

Along the same lines, I think the REQUIREMENT that x[0] rather than
x[1] be the first element of list x is a mistake. At least the
programmer should have a choice, as in Fortran or VBA. In C starting at
0 may be justified because of the connection between array subscripting
and pointer arithmetic, but Python is a higher-level language where
such considerations are less relevant.



From tundra at tundraware.com  Thu Apr 21 05:17:28 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 21 Apr 2005 05:17:28 EDT
Subject: goto statement
In-Reply-To: <3cmtgvF6q13cvU1@individual.net>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
Message-ID: <dl7kj2-e6n.ln1@eskimo.tundraware.com>

Reinhold Birkenfeld wrote:

> John Bokma wrote:
> 
>>Mage wrote:
>>
>>
>>>praba kar wrote:
>>>
>>>
>>>>Dear All,
>>>>
>>>>  In Python what is equivalent to goto statement
>>>>
>>>> 
>>>>
>>>
>>>You shouldn't use goto in high-level languages.
>>
>>Nonsense

+1

> 
> 
> Thank you!
> 
> Above all your claim is well justified. These brilliant arguments
> you have put forth really explain in a magnificent way why goto is a
> sane addition to any HLL.
> 
> Reinhold

OK - Here's some reasoning that may illuminate it.  We could, in theory,
reduce any language to the minimal Boehm & Jacopini control structures
(iirc there were only four).  In effect, anything beyond these is
syntactic sugar.  IOW, feel free to use a minimalist Turing Machine
to implement your next 100,000 line program.

I, on the other hand, have a really hard time finding infinite tapes (in
both directions) and a suitably fast tape reader to implement such
ideas. (I also seem to recall that any digital circuit can be
implemented with nothing more than AND and NOT gates, but I'd rather
not, thanks - I don't have enough probes on my oscilloscope to debug
that kind of hardware.)

Control structures/directives evolve to solve real problems. 'goto',
properly used, can actually clarify code, especially when dealing with
exceptions and the like. Oh, we may rename it and call it 'break' or
'try/except' or whatever suits the language author's fancy, but the
concept is similar, if not identical.  'goto' certainly could be
synthesized in Python with the appropriate try/except hierarchy
and custom exceptions, but in many cases this would *really* be overkill -
a simple 'goto' would be considerably simpler *and* probably easier
to understand.  Note that I am not arguing for 'goto' in Python,
merely trying to respond to your point about why it is does not inherently
appropriate for HLLs.

Some HLLs almost have to have it by definition.  I cut my teeth as programmer
writing for embedded realtime systems in a HLL (PL/M).  While you could,
in theory, completely avoid 'goto' in a realtime environment, it would
make all manner of practical programming problems kind of ugly to implement.
BTW, all modern systems come complete with 'goto' implemented in
*hardware* - they're called "interrupts".

More to the point, I have seen some really tortured code written in the
name of maintaining religious purity of some kind ("Structure", "Object
Orientation",...). While language constructs can promote better- or
worse code structuring, at the end of the day, programming is still the
expression of human thought. Some people think clearly, some don't, and
this has little to do with just what language structures are in use.

Python is elegant at almost every level, and I am certainly not
arguing for 'goto' in the language.  But to reflexively assume that
it has *no* place in a modern HLL is, I think, a bit overstated.


I must now 'goto' sleep ... and I cannot think of a better way
to express this...


-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From http  Fri Apr 22 11:48:32 2005
From: http (Paul Rubin)
Date: 22 Apr 2005 08:48:32 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<42690932.237021939@news.oz.net>
Message-ID: <7xk6mun773.fsf@ruckus.brouhaha.com>

Wow, thanks for that very complete answer.  I'll try some of those things.


From lucio.torre at gmail.com  Mon Apr 18 09:22:13 2005
From: lucio.torre at gmail.com (Lucio Torre)
Date: 18 Apr 2005 06:22:13 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<1113682846.004698.182180@l41g2000cwc.googlegroups.com>
Message-ID: <1113830533.234327.105980@f14g2000cwb.googlegroups.com>

Most likely you run out of stack. The amount of memory this beast
required for initialization was too much for most old Palms.

Ive tried it on PalmOS simulator mainly, and on some version of OS5
hardware.

Lucio.



From mauriceling at acm.org  Tue Apr 26 21:54:50 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 11:54:50 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com><d4kh4q$tqf$1@domitilla.aioe.org>	<86wtqqm27r.fsf@guru.mired.org><d4ktck$r9a$1@domitilla.aioe.org>	<86is29n9cg.fsf@guru.mired.org><d4l825$mj7$1@domitilla.aioe.org><mailman.2525.1114534435.1799.python-list@python.org>	<d4md4t$gfm$1@domitilla.aioe.org>
	<mailman.2548.1114556884.1799.python-list@python.org>
Message-ID: <d4mrdf$jrc$1@domitilla.aioe.org>

> The same *can* be said for some decade-old .py files.  Certainly, most 
> everything written for 2.0 onward still works.  The same will also be true 
> for .pyc files as long as you run them with their corresponding binary and 
> as long as the binary stills run.
> 
> However, .pyc files are private, temporary caches created by a CPython 
> interpreter for its own use and tied to its current implementation 
> technology.  They are not intended to be a public distribution form and 
> indeed cannot be a means to run Python programs on other interpreters. 
> Guido has stated that he want the freedom to change or even replace parts 
> of the internal implementation as he sees fit. (2.5 will probably get a new 
> compiler, with the difference mostly transparent to users.)
> 
> One of the principles of OOP is separation of interface from 
> implementation.  User of a class should only use the public interface and 
> not depend on private implementation.  One reason is so implementation can 
> be changed even radically as long as interface is kept constant.  The 
> Python language is interface.  CPython bytecodes are implementation.
> 

 From a technical perspective, I can accept that .pyc files are private 
and temporary. To a certain extend, it does helps development cycle. 
Every time I amend my source codes, I just run it without having to 
consider or needing to re-compile the source files.

The idea of having to release the program or library as source files 
does ring alarms in many executives in corporate world. Less freezing 
the modules (which renders it platform dependent) or using Jython (which 
is not possible when C extensions are involved), there is no middle 
grounds in CPython for distribution without source codes.

Every now and then, there will be new threads in this list about people 
asking the means and possibilities of releasing a module/program without 
having to release the source code (there's another new thread on it 
today, "Can .py be compiled?")...

> 
>>What I do have resources (time and energy) for is to work with the 
>>maintainers of PyPI to implement the package maintenance system I've 
>>described......
> 
> 
> Good.  I agree that we need more along that line.
> 
I've posted my idea on catelog-sig mailing list. Hope it get picked up...

Cheers
Maurice


From sabbey at u.washington.edu  Sat Apr 16 21:46:28 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 18:46:28 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <4260bc72.67216001@news.oz.net>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<4260bc72.67216001@news.oz.net>
Message-ID: <Pine.A41.4.61b.0504161733560.72462@dante72.u.washington.edu>

Bengt Richter wrote:
>> Good background on thunks can be found in ref. [1].
>
> UIAM most of that pre-dates decorators. What is the relation of thunks
> to decorators and/or how might they interact?

Hmm, I think you answered this below better than I could ;).

>> def f(thunk):
>>    before()
>>    thunk()
>>    after()
>>
>> do f():
>>    stuff()
>>
>> The above code has the same effect as:
>>
>> before()
>> stuff()
>> after()
> Meaning "do" forces the body of f to be exec'd in do's local space? What if there
> are assignments in f? I don't think you mean that would get executed in do's local space,
> that's what the thunk call is presumably supposed to do...

Yes, I see now that there is an ambiguity in this example that I did not 
resolve.  I meant that the suite of the 'do' statement gets wrapped up as 
an anonymous function.  This function gets passed to 'f' and can be used 
by 'f' in the same way as any other function.  Bindings created in 'f' are 
not visible from the 'do' statement's suite, and vice-versa.  That would 
be quite trickier than I intended.

>> Other arguments to 'f' get placed after the thunk:
>>
>> def f(thunk, a, b):
>>     # a == 27, b == 28
>>     before()
>>     thunk()
>>     after()
>>
>> do f(27, 28):
>>     stuff()
> I'm not sure how you intend this to work. Above you implied (ISTM ;-)
> that the entire body of f would effectively be executed locally. But is that
> true? What if after after() in f, there were a last statment hi='from last statement of f'
> Would hi be bound at this point in the flow (i.e., after d f(27, 28): stuff() )?

I didn't mean to imply that.  The body of 'f' isn't executed any 
differently if it were called as one normally calls a function.  All of 
its bindings are separate from the bindings in the 'do' statement's scope.

> I'm thinking you didn't really mean that. IOW, by magic at the time of calling thunk from the
> ordinary function f, thunk would be discovered to be what I call an executable suite, whose
> body is the suite of your do statement.

yes

> In that case, f iself should not be a callable suite, since its body is _not_ supposed to be called locally,
> and other than the fact that before and after got called, it was not quite exact to say it was _equivalent_ to
>
> before()
> stuff() # the do suite
> after()

yes, I said "same effect as" instead of "equivalent" so that too much 
wouldn't be read from that example.  I see now that I should have been 
more clear.

> In that case, my version would just not have a do, instead defining the do suite
> as a temp executable suite, e.g., if instead
>
>
> we make an asignment in the suite, to make it clear it's not just a calling thing, e.g.,
>
> do f(27, 28):
>      x = stuff()
>
> then my version with explict name callable suite would be
>
> def f(thunk, a, b):
>      # a == 27, b == 28
>      before()
>      thunk()
>      after()
>
> set_x():
>     x = stuff() # to make it plain it's not just a calling thing
>
> f(set_x, 27, 28)
> # x is now visible here as local binding
>
> but a suitable decorator and an anonymous callable suite (thunk defined my way ;-) would make this
>
> @f(27, 28)
> (): x = stuff()
>

Hmm, but this would require decorators to behave differently than they do 
now.  Currently, decorators do not automatically insert the decorated 
function into the argument list.  They require you to define 'f' as:

def f(a, b):
 	def inner(thunk):
 		before()
 		thunk()
 		after()
 	return inner

Having to write this type of code every time I want an thunk-accepting 
function that takes other arguments would be pretty annoying to me.

>>
>> Thunks can also accept arguments:
>>
>> def f(thunk):
>>    thunk(6,7)
>>
>> do x,y in f():
>>    # x==6, y==7
>>    stuff(x,y)
>
> IMO
>    @f
>    (x, y): stuff(x, y)   # like def foo(x, y): stuff(x, y)
>
> is clearer, once you get used to the missing def foo format
>

OK.  I prefer a new keyword because it seems confusing to me to re-use 
decorators for this purpose.  But I see your point that decorators can be 
used this way if one allows anonymous functions as you describe, and if 
one allows decorators to handle the case in which the function being 
decorated is anonymous.

>>
>> The return value can be captured
>>
> This is just a fallout of f's being an ordinary function right?
> IOW, f doesn't really know thunk is not an ordinary callable too?
> I imagine that is for the CALL_FUNCTION byte code implementation to discover?

yes

>
>> def f(thunk):
>>    thunk()
>>    return 8
>>
>> do t=f():
>>    # t not bound yet
>>    stuff()
>>
>> print t
>> ==> 8
> That can't be done very well with a decorator, but you could pass an
> explicit named callable suite, e.g.,
>
>     thunk(): stuff()
>     t = f(thunk)

But not having to do it that way was most of the purpose of thunks.

>>
>> Thunks blend into their environment
> ISTM this needs earlier emphasis ;-)
>
>>
>> def f(thunk):
>>    thunk(6,7)
>>
>> a = 20
>> do x,y in f():
>>    a = 54
>> print a,x,y
>>
>> ==> 54,6,7
>
> IMO that's more readable as
>
>    def f(thunk):
>        thunk(6, 7)
>    @f
>    (x, y):         # think def foo(x, y): with "def foo" missing to make it a thunk
>        a = 54
>    print a,x,y
>
> IMO we need some real use cases, or we'll never be able to decide what's really useful.
>>
>> Thunks can return values.  Since using 'return' would leave it unclear
>> whether it is the thunk or the surrounding function that is returning, a
>> different keyword should be used. By analogy with 'for' and 'while' loops,
>> the 'continue' keyword is used for this purpose:
> Gak ;-/
>>
>> def f(thunk):
>>    before()
>>    t = thunk()
>>    # t == 11
>>    after()
>>
>> do f():
>>    continue 11
>
> I wouldn't think return would be a problem if the compiler generated a
> RETURN_CS_VALUE instead of RETURN_VALUE when it saw the end of
> the callable suite (hence _CS_) (or thunk ;-)
> Then it's up to f what to do with the result. It might pass it to after() sometimes.

It wouldn't be a problem to use 'return' instead of 'continue' if people 
so desired, but I find 'return' more confusing because a 'return' in 'for' 
suites returns from the function, not from the suite.  That is, having 
'return' mean different things in these two pieces of code would be 
confusing:

for i in [1,2]:
 	return 10

do i in each([1,2]):
 	return 10


>
>>
>> Exceptions raised in the thunk pass through the thunk's caller's frame
>> before returning to the frame in which the thunk is defined:
> But it should be possible to have try/excepts within the thunk, IWT?

yes, it is possible and they are allowed in the example implementation.

>>
>> def catch_everything(thunk):
>>     try:
>>         thunk()
>>     except:
>>         pass    # SomeException gets caught here
>>
>> try:
>>     do catch_everything():
>>        raise SomeException
>> except:
>>     pass        # SomeException doesn't get caught here because it was
>> already caught
>>
>> Because thunks blend into their environment, a thunk cannot be used after
>> its surrounding 'do' statement has finished:
>>
>> thunk_saver = None
>> def f(thunk):
>>     global thunk_saver
>>     thunk_saver = thunk
>>
>> do f():
>>     pass
>>
>> thunk_saver() # exception, thunk has expired
> Why? IWT the above line would be equivalent to executing the suite (pass) in its place.

The restriction on saving thunks for later is for performance reasons and 
because I believe it is hacky to use thunks in that way.

> What happens if you defined
>
> def f(thunk):
>    def inner(it):
>        it()
>    inner(thunk)
>
> do f():
>    x = 123
>
> Of course, I'd spell it
>    @f
>    (): x = 123
>
> Is there a rule against that (passing thunk on to inner)?

No, that is fine, as long as execution has not yet left the 'do' 
statement.

>> 'break' and 'return' should probably not be allowed in thunks.  One could
>> use exceptions to simulate these, but it would be surprising to have
>> exceptions occur in what would otherwise be a non-exceptional situation.
>> One would have to use try/finally blocks in all code that calls thunks
>> just to deal with normal situations.  For example, using code like
>>
>> def f(thunk):
>>     thunk()
>>     prevent_core_meltdown()
>>
>> with code like
>>
>> do f():
>>     p = 1
>> return p
>>
>> would have a different effect than using it with
>>
>> do f():
>>     return 1
>>
>> This behavior is potentially a cause of bugs since these two examples
>> might seem identical at first glance.
> I think less so with decorator and anonymous callable suite format
>
>    @f
>    (): return 1  # as in def foo(): return 1  -- mnemonically removing "def foo"
>

In your syntax, 'return' would return from the thunk.  With the 'do' 
syntax, 'return' would return from the surrounding function.  So the issue 
does not arise with your syntax.

>>
>> The thunk evaluates in the same frame as the function in which it was
>> defined. This frame is accessible:
>>
>> def f(thunk):
>>     frame = thunk.tk_frame
>      # no connection with tkinter, right? Maybe thunk._frame would also say be careful ;-)
>      assert sys._getframe(1) is frame # ?? when does that fail, if it can?

'tk' is supposed to remind one of 'thunk'.  I believe that follows a 
standard naming convention in python (e.g. see generators).

I don't see how that assert can fail.

I see what you're getting at with decorators and anonymous functions, but 
there are a couple of things that, to me, make it worth coming up with a 
whole new syntax.  First, I don't like how one does not get the thunk 
inserted automatically into the argument list of the decorator, as I 
described above.  Also, I don't like how the return value of the decorator 
cannot be captured (and is already used for another purpose).  The fact 
that decorators require one more line of code is also a little bothersome. 
Decorators weren't intended to be used this way, so it seems somewhat 
hacky to do so.  Why not a new syntax?

-Brian


From sunnan at handgranat.org  Sat Apr  2 06:35:17 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sat, 02 Apr 2005 11:35:17 GMT
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
 Flaw
In-Reply-To: <mailman.1221.1112416371.1799.python-list@python.org>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<pan.2005.04.01.15.50.51.219430@jerf.org>	<iUe3e.21015$d5.156054@newsb.telia.net>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
Message-ID: <Vrv3e.133894$dP1.471335@newsc.telia.net>

Tim Peters wrote:
> [Aahz]
> 
>>>"The joy of coding Python should be in seeing short, concise, readable
>>>classes that express a lot of action in a small amount of clear code --
>>>not in reams of trivial code that bores the reader to death."  --GvR
> 
> 
> [Sunnan]
> 
>>Can anyone please point me to the text that quote was taken from? I
>>tried to use a search engine but I only found quotations, not the source.
> 
> 
> That's because it was originally in email to a company-internal
> mailing list.  If you're willing to move to Fredericksburg, VA and
> work for Zope Corp, perhaps they'll let you in to the PythonLabs list
> archives.  Fair warning:  I work for Zope Corp, and I'm not sure I can
> get into those archives.  So don't switch jobs _just_ for that.

It's just that I'm having a hard time matching that quote to what I 
though python was about. I thought boring code was considered a virtue 
in python. ("Explicit is better than implicit", "sparse is better than 
dense".)

Because what is "boring"? The opposite of dense, tense, intense. Utterly 
predictable; it's like the combination of all my prejudices. Even before 
I knew, I thought "Bet Python separates statements from expressions".


Sunnan
PS.
(People easily offended can substitute "boring" for "readable" in the 
above text.)


From llothar at web.de  Mon Apr 18 21:52:46 2005
From: llothar at web.de (Lothar Scholz)
Date: 18 Apr 2005 18:52:46 -0700
Subject: Can't compile with --enable-shared on MacOSX
References: <6ee58e07.0504180620.4b157ebf@posting.google.com>
	<4263d20e$0$149$e4fe514c@news.xs4all.nl>
Message-ID: <6ee58e07.0504181752.c83afcf@posting.google.com>

Maarten Sneep <iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid> wrote in message news:<4263d20e$0$149$e4fe514c at news.xs4all.nl>...

> On Mac OS X the shared library functionality is obtained through 
> frameworks. It may detect this by default, but I'm not sure about 

Not good. I don't want frameworks. I must embedd python into my
application.
Setting up a framework and installing/maintaining it is much more work
especially when i'm already doing my own maintainance for the
Linux/Windows port.

No ther way then stealing the dylib from the framework directory ?


From jepler at unpythonic.net  Fri Apr  1 08:07:01 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Fri, 1 Apr 2005 07:07:01 -0600
Subject: Spider - path conflict [../test.htm,www.nic.nl/index.html]
In-Reply-To: <1112357294.881735.287370@o13g2000cwo.googlegroups.com>
References: <1112357294.881735.287370@o13g2000cwo.googlegroups.com>
Message-ID: <20050401130658.GA22184@unpythonic.net>

I think you want urllib.basejoin().

>>> urllib.basejoin("http://www.example.com/test/page.html", "otherpage.html")
'http://www.example.com/test/otherpage.html'
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From kay.schluehr at gmx.net  Tue Apr 19 03:16:32 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 19 Apr 2005 00:16:32 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
In-Reply-To: <42634e5c.235641494@news.oz.net>
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<4262e25b.207992156@news.oz.net>
	<1113799727.299053.138010@f14g2000cwb.googlegroups.com>
	<42634e5c.235641494@news.oz.net>
Message-ID: <1113894992.556496.73510@f14g2000cwb.googlegroups.com>


Bengt Richter wrote:

[...]

> Um, I think that's too narrow for where. Consider
>
>     foo = f1; bar=f2; x=k1; y=k2
>     foo(x)*bar(y)[3].attr
>
> now should
>
>     foo(x)*bar(y)[3].attr where:
>         foo = f1; bar=f2; x=k1; y=k2

I think we are diverging again. You are right with Your objection about
my claim of generality but I'm completely against the latter statement
not only because

foo(x) where:
   foo = f1

is not much better than

foo(x) where:
   def foo():
       # do some stuff

which should clearly raise an exception and be abandoned.

After all I start backtracking: the purpose of defining suites is still
prevention of namespaces pollution with helper-functions not a sake of
it's own and not inventing of a suite-based programming style for
everything. The examples You presented have become almost pathological
examples of what should be prevented and where syntax cannot be rigid
enough.

So there are following requierements about we seem to agree:

- define suites on a functions-call scope in order to define helper
functions
  that would otherwise pollute external namespaces

- mark the func-call-scope by some keyword either "with" or "where"
because
  it has to be separated from the calling environment both for
consistency
  and user friendlyness

- Simple matching rules for both keyword-parameters and
argument-tuples.
  Make explicit which kind of inference rule is selected.

I think that my last proposal I finally distilled from our discussion
would pretty much fullfill all three requirements whereas that of
Andrey Tatarinov would be somewhat more restrictive and fullfills only
the first two. 

Ciao,
Kay



From tiissa at nonfree.fr  Sat Apr 23 06:20:39 2005
From: tiissa at nonfree.fr (tiissa)
Date: Sat, 23 Apr 2005 12:20:39 +0200
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114215456.258241.194840@l41g2000cwc.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<1114215456.258241.194840@l41g2000cwc.googlegroups.com>
Message-ID: <426a2177$0$19274$636a15ce@news.free.fr>

mehmetmutigozel at gmail.com wrote:
> i wonder if there is an automatic way to make that without calling a
> function.

You mean without _explicitely_ calling a function.
May I inquire why you need to write f instead of f(x)?

> an automatic way that depends on changing the value of x. as each time
> x=something used the whole matrix changes automaticly.

As pointed out by El Pitonero property can be your friend:

  >>> class A(object):
  ...     def get_v(self):
  ...             return [1,x]
  ...     v=property(get_v)
  ...
  >>> a=A()
  >>> x=0
  >>> a.v
  [1, 0]
  >>> x=2
  >>> a.v
  [1, 2]
  >>>

However, you will calculate your matrix each time you will access it 
(and I find it ugly to use a global variable this way).

You can however build it the other way round:

  >>> class B(object):
  ...     def __init__(self):
  ...             self.v=[1,0]
  ...             self.x=0
  ...     def calc_v(self):
  ...             self.v[1]=self.__x
  ...     def set_x(self,x):
  ...             self.__x=x
  ...             self.calc_v()
  ...     def get_x(self):
  ...             return self.__x
  ...     x=property(get_x, set_x)
  ...
  >>> b=B()
  >>> b.v
  [1, 0]
  >>> b.x=2
  >>> b.v
  [1, 2]
  >>>

This time, calculations only occur when you change the value of x.


From xnews2 at fredp.lautre.net  Mon Apr 11 09:26:54 2005
From: xnews2 at fredp.lautre.net (Fred Pacquier)
Date: 11 Apr 2005 13:26:54 GMT
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
Message-ID: <Xns96359D512AF1APaCmAnRDLM@212.27.42.73>

"ajikoe at gmail.com" <ajikoe at gmail.com> said :

> Hello I need to build table which need searching data which needs more
> power then dictionary or list in python, can anyone help me what kind
> of database suitable for python light and easy to learn. Is mySQL a
> nice start with python ?

There are a number of separate database engines with a python interface, as 
others in the thread have shown. However, if you mostly work with one table 
at a time, as you seem to imply, then you might have a look a Kirbybase : 
it's a single python module, and databases don't come any lighter or easier 
than that :)

-- 
YAFAP : http://www.multimania.com/fredp/


From roy at panix.com  Fri Apr 29 18:12:58 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 29 Apr 2005 18:12:58 -0400
Subject: Sorting an Edge List
References: <fLqdne0t4Y81OO_fRVn-qw@comcast.com>
Message-ID: <roy-5F8B9B.18125729042005@reader1.panix.com>

In article <fLqdne0t4Y81OO_fRVn-qw at comcast.com>,
 "Anthony D'Agostino" <gamma-ray at dope.comcast.net> wrote:

> I need to sort this list:
> [('A','Y'), ('J','A'), ('Y','J')] like this:
> [('A','Y'), ('Y','J'), ('J','A')].
> 
> Note how the Ys and Js are together. All I need is for the second element of 
> one tuple to equal the first element of the next tuple. Another valid 
> solution is [('J','A'), ('A','Y'), ('Y','J')].

This is an interesting problem.  Can you give us more details?  I'm 
assuming the length of the list can be any arbitrary length.  Will there 
always only be three letters?  Can there ever be a pair with the same first 
and second elements, i.e. ('A', 'A')?

Will there always be a valid solution?  For example, it's trivial to show 
that

[('A', 'Y'), ('A', 'J'), ('J', 'A')]

cannot be sorted using your criteria (there's no pair starting with 'Y' to 
match the one that ends with 'Y')

Is this a real-life problem, or are we doing your homework for you? :-)


From mage at mage.hu  Sat Apr 23 03:43:52 2005
From: mage at mage.hu (Mage)
Date: Sat, 23 Apr 2005 09:43:52 +0200
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <42698692$1@nntp0.pdx.net>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>	<mailman.2320.1114211454.1799.python-list@python.org>
	<42698692$1@nntp0.pdx.net>
Message-ID: <4269FCB8.5010402@mage.hu>

Scott David Daniels wrote:

>
>
> See, the body of your anonymous function just looks for "the current
> value of n" when it is _invoked_, not when it is _defined_.

The "lambda functions" was an unclear part of the tutorial I read.
Should I use them? Are they pythonic?
As far I see they are good only for type less a bit.

       Mage




From swaroopch at gmail.com  Sat Apr  2 07:12:01 2005
From: swaroopch at gmail.com (Swaroop C H)
Date: Sat, 2 Apr 2005 17:42:01 +0530
Subject: pagecrawling websites with Python
In-Reply-To: <1112385491.601719.67420@o13g2000cwo.googlegroups.com>
References: <1112385491.601719.67420@o13g2000cwo.googlegroups.com>
Message-ID: <351e887105040204123ff58c0@mail.gmail.com>

On 1 Apr 2005 11:58:11 -0800, writeson <writeson at charter.net> wrote:
> We've got an application we wrote in Python called pagecrawler that
<snip />
> Does anyone have any insight if this is a reasonable approach to build web pages,
> or if we should look at another design?

I don't have an answer to your particular question, but maybe you can
have a look at how the HarvestMan works:

http://freshmeat.net/projects/harvestman


Regards,
-- 
Swaroop C H
Blog: http://www.swaroopch.info
Book: http://www.byteofpython.info


From rkern at ucsd.edu  Mon Apr 11 16:23:01 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 11 Apr 2005 13:23:01 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <d3dt89$s52$1@sea.gmane.org>
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de><mailman.1647.1113160640.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de><d3c88t$r27$1@sea.gmane.org>	<d3d0l5$8s1$1@sea.gmane.org><d3d7ft$ljg$1@sea.gmane.org>	<d3dcn8$3i9$1@sea.gmane.org>
	<d3dt89$s52$1@sea.gmane.org>
Message-ID: <d3em5k$rno$2@sea.gmane.org>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
> 
>>Agreed, which is why I think that proper package management and a CPyAN-type system is the way to 
>>go, not trying to stuff everything into a single distribution.
> 
> 
> I think we're looking at this in two different ways: you're looking at it from the "sumo
> python distribution" perspective, I'm trying to find a middle ground between a sumo
> distribution and today's put-it-in-our-repository-or-else approach.

Okay, then we may be advocating the same thing, and I'm misinterpreting 
your comments. Wouldn't be the first time.

> (I have more comments to your comments, but they have to wait until later)

I look forward to them.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From bj_666 at gmx.net  Sat Apr  2 15:42:35 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 02 Apr 2005 22:42:35 +0200
Subject: Performance issue
References: <mailman.1239.1112456748.1799.python-list@python.org>
Message-ID: <pan.2005.04.02.20.42.34.146641@gmx.net>

In <mailman.1239.1112456748.1799.python-list at python.org>, Tom Carrick
wrote:

> In my attempted learning of python, I've decided to recode an old
> anagram solving program I made in C++. The C++ version runs in less
> than a second, while the python takes 30 seconds. I'm not willing to
> think it's just python being slow, so I was hoping someone could find
> a faster way of doing this. Also, I was wondering if there was a more
> builtin, or just nicer way of converting a string to a list (or using
> the sort function on a list) than making a function for it.
> 
> The words.txt here is just a copy of FreeBSD's /usr/share/dict/words

Here's my attempt which builds an anagram dictionary ("sorted word" ->
list of anagrams) for fast lookup of anagrams::

#!/usr/bin/env python2.4
from itertools import imap, ifilter

WORDS = '/usr/share/dict/words'

def make_anagram_map(words):
    anagram_map = dict()
    for word in imap(lambda w: w.strip().lower(), words):
        sorted_word = ''.join(sorted(list(word)))
        anagram_map.setdefault(sorted_word, list()).append(word)
    
    return dict(ifilter(lambda x: len(x[1]) > 1, anagram_map.iteritems()))


def main():
    words_file = open(WORDS, 'r')
    anagram_map = make_anagram_map(words_file)
    words_file.close()
    
    while True:
        word = raw_input('Find anagrams of word (just enter to end): ')
        if not word:
            break
        try:
            print anagram_map[''.join(sorted(list(word.strip().lower())))]
        except KeyError:
            print 'No anagrams found for %r' % word

    # # Print all anagrams sorted by number of anagrams.
    # print '\n'.join(map(str, sorted(anagram_map.values(), key=len)))
    # print len(anagram_map)


if __name__ == '__main__':
    main()


Ciao,
	Marc 'BlackJack' Rintsch


From surrender_it at remove-yahoo.it  Thu Apr 28 19:35:33 2005
From: surrender_it at remove-yahoo.it (gabriele renzi)
Date: Thu, 28 Apr 2005 23:35:33 GMT
Subject: anonymous function objects?
In-Reply-To: <d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
	<d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
Message-ID: <9rece.70309$IN.1217267@twister2.libero.it>

Uwe Mayer ha scritto:
> Friday 29 April 2005 00:06 am Paul Rubin wrote:
> 
>>Closest you can come is:
>>
>>   f = lambda: sys.stdout.write("hello world\n")
> 
>  
> Ah. :))
> Why does the "print" statement return a syntax error here?
>                      ^^^^^^^^^
> 

this is the reason :)
You can't have statements into an expression


From robin at reportlab.com  Mon Apr 25 10:50:31 2005
From: robin at reportlab.com (Robin Becker)
Date: Mon, 25 Apr 2005 15:50:31 +0100
Subject: Python, Perl & PDF files
In-Reply-To: <d4iv1b$mfn$1@solaris.cc.vt.edu>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
Message-ID: <426D03B7.1020400@chamonix.reportlab.co.uk>

rbt wrote:
......
> 
> I just want to read PDF files in a portable way (windows, linux, mac) 
> from within Python.
> 
......

I suppose you mean extract PDF pages and do something with them. 
http://www.reportlab.com does have a tool that handles that in Python. It's not 
free though.

There are indeed a number of perl modules which do that and other modules which 
allow you to overprint etc etc.

You can always hand translate one of the extract perl modules. They don't seem 
that hard. Alternatively put a good case to andy at reportlab.com.
-- 
Robin Becker



From python at rcn.com  Tue Apr 12 08:03:50 2005
From: python at rcn.com (Raymond Hettinger)
Date: Tue, 12 Apr 2005 08:03:50 -0400
Subject: [Python-Dev] args attribute of Exception objects
In-Reply-To: <BAY103-F240325F2A9A571969FDB0A43F0@phx.gbl>
Message-ID: <000001c53f57$b0fe7d20$c2bd2c81@oemcomputer>

[S?bastien de Menten]
>  2) Could this be changed to .args more in line with:
>     a) first example: e.args = ('foo', "NameError: name 'foo' is not
> defined")
>     b) second example: e.args = (4, 'foo', "'int' object has no
attribute
> 'foo'",)
>   the message of the string can even be retrieved with str(e) so it is
> also
> redundant.

Something like this ought to be explored at some point.  It would
certainly improve the exception API to be able to get references to the
objects without parsing strings.

The balancing forces are backwards compatibility and a need to keep the
exception mechanism as lightweight as possible.

Please log a feature request on SF.  Note that the idea is only for
making builtin exceptions more informative.  User defined exceptions can
already attach arbitrary objects:

>>> class Boom(Exception):
        pass

>>> x = 10
>>> if x != 5:
        raise Boom("Value must be a five", x)

Traceback (most recent call last):
  File "<pyshell#12>", line 2, in -toplevel-
    raise Boom("Value must be a five", x)
Boom: ('Value must be a five', 10)


Raymond Hettinger


From littlejohn.75 at news.free.fr  Fri Apr  1 18:06:35 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 01 Apr 2005 23:06:35 GMT
Subject: that is it is not it (logic in Python)
References: <424d0be1$0$2882$626a14ce@news.free.fr>
	<mailman.1199.1112380840.1799.python-list@python.org>
	<424dc4b4$0$18707$636a15ce@news.free.fr>
	<pan.2005.04.01.22.42.30.441348@jerf.org>
Message-ID: <424dd3fb$0$19147$636a15ce@news.free.fr>

Le Fri, 01 Apr 2005 17:42:30 -0500, Jeremy Bowers a ?crit :
> On Fri, 01 Apr 2005 22:01:25 +0000, F. Petitjean wrote:
> 
>> Le Fri, 1 Apr 2005 13:39:47 -0500, Terry Reedy a ?crit :
>>> This is equivalent to '(that is it) and (it is not it)' which is clearly 
>>> false.
>>> 
>>>> False   # What ?
>>> 
>>> Reread the ref manual on chained comparison operators.
>>
>> And see the date of the post :-)
>> that is it  isn't it ?
> 
> Nope, nothing to do with it. Read the ref manual on chained comparision
> operators.
> 
> http://www.python.org/doc/2.4/ref/comparisons.html#l2h-430
> 
> For proof, run the given code in the original post. It's not faked in the
> slightest, and the manual holds the key to understanding.
*I* wrote the original post.  and am pretty sure it is not faked. And I
run it before posting to be sure not to say anything wrong. it is a kind
of relief to learn that computers in 2005 (even Python powered) are
humor-impaired and follow the ? ref manual ? every time even on first
April.

>>> There = True
>>> Python = map(bool, range(5))
>>> logic = True
>>> There is logic in Python
True   # naturally


From dbasch at yahoo.com  Sun Apr 10 15:45:20 2005
From: dbasch at yahoo.com (Derek Basch)
Date: 10 Apr 2005 12:45:20 -0700
Subject: Counting iterations
In-Reply-To: <pan.2005.04.09.18.17.29.903696@dalkescientific.com>
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
	<1113064744.144787.315120@o13g2000cwo.googlegroups.com>
	<pan.2005.04.09.18.17.29.903696@dalkescientific.com>
Message-ID: <1113162320.578460.95300@g14g2000cwa.googlegroups.com>

Interesting stuff Andrew. I do generally avoid string concantination
for the reason listed in the Python Performance Tips but your analysis
kinda puts that in question. Such a dense discussion for me just trying
to find the enumerate() function :). I guess that is why the python
list is so great. You guys always rip my code apart and correct my
style. Even if it is just a stupid one off example.

Thanks everyone,
Derek Basch



From mahs at telcopartners.com  Sat Apr 23 19:43:21 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 23 Apr 2005 16:43:21 -0700
Subject: Handling lists
In-Reply-To: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
References: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
Message-ID: <d4em8c$b3k$1@sea.gmane.org>

superprad at gmail.com wrote:
...
> list = [[10,11,12,13,14,78,79,80,81,300,301,308]]
> how do I convert it so that I arrange them into bins  .
> so If i hvae a set of consecutive numbers i would like to represent
> them as a range in the list with max and min val of the range alone.
> I shd get something like 
> list = [[10,14],[78,81],[300,308]]

> 
Mage:
> Maybe:
> 
> list = [10,11,12,13,14,78,79,80,81,300,301,308]
> 
> new_list = []
> start = 0
> for i in range(1,len(list) + 1):
>     if i == len(list) or list[i] - list[i-1] <> 1:
>         new_list.append([list[start],list[i-1]])
>         start = i
> 
> print new_list

superprad at gmail.com wrote:
> yes that makes sense.But the problem I am facing is  if list=
> [300,301,303,305] I want to consider it as one cluster and include the
> range as [300,305] so this is where I am missing the ranges.
> so If the list has l = [300,301,302,308,401,402,403,408] i want to
> include it as [[300,308],[401,408]].


Mage's solution meets the requirements that you initially stated of treating 
*consecutive* numbers as a group.  Now you also want to consider 
[300,301,303,305] as a cluster.

You need to specify your desired clustering rule, or alternatively specify ho 
many bins you want to create, but as an example, here is a naive approach, that 
could be adapted easily to other clustering rules and (a bit less easily) to 
target a certain number of bins

def lstcluster(lst):
     # Separate neighbors that differ by more than the mean difference
     lst.sort()
     diffs = [(b-a, (a, b)) for a, b in zip(lst,lst[1:])]
     mean_diff = sum(diff[0] for diff in diffs)/len(diffs)
     breaks = [breaks for diff, breaks in diffs if diff > mean_diff]
     groups = [lst[0]] + [i for x in breaks for i in x] + [lst[-1]]
     igroups = iter(groups) # Pairing mechanism due to James Stroud
     return [[i, igroups.next()] for i in igroups]

Note this is quite inefficient due to creating several intermediate lists.  But 
it's not worth optimizing yet, since I'm only guessing at your actual requirement.

lst0 = [10,11,12,13,14,78,79,80,81,300,301,308]
lst1 = [10,12,16,24,26,27,54,55,80,100, 105]
lst3 = [1,5,100,1000,1005,1009,10000, 10010,10019]

  >>> lst0 = [10,11,12,13,14,78,79,80,81,300,301,308]
  >>> lst1 = [10,12,16,24,26,27,54,55,80,100, 105]
  >>> lst2 = [1,5,100,1000,1005,1009,10000, 10010,10019]
  >>> lstcluster(lst0)
  [[10, 14], [78, 81], [300, 308]]
  >>> lstcluster(lst1)
  [[10, 27], [54, 55], [80, 80], [100, 105]]
  >>> lstcluster(lst2)
  [[1, 1009], [10000, 10019]]
  >>>


Michael



From peter at engcorp.com  Fri Apr 22 18:21:00 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 22 Apr 2005 18:21:00 -0400
Subject: Python licence again
In-Reply-To: <42697785$0$2594$da0feed9@news.zen.co.uk>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com> <FtCdneI1TKgS8vTfRVn-1w@powergate.ca>
	<42697785$0$2594$da0feed9@news.zen.co.uk>
Message-ID: <N5mdnSvGIfGT5PTfRVn-pg@powergate.ca>

Will McGugan wrote:
> Peter Hansen wrote:
>> How *do* you pronounce it?  "Thurrow" seems to match
>> how I say the word, along with everyone else I've
>> ever met (until now?).
> 
> I would pronounce it like 'thurra', since I'm Scottish. It always makes 
> me cringe when Americans pronounce 'Edinburgh' as 'edin-burrow' rather 
> then 'edin-burra'.

And I would pronounce it as just "edin-burr"... I've
heard the (as you call it) American pronunciation before,
but never the, uh, real one, which you use. :-)

> I love how this newsgroup can digress so quickly.. ;)

It does do that, doesn't it?  And all on its own, too! ;-)

-Peter


From duncan.booth at invalid.invalid  Fri Apr 15 10:55:27 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Apr 2005 14:55:27 GMT
Subject: sort of a beginner question about globals
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
	<Xns963892E01D954duncanrcpcouk@127.0.0.1>
	<1113573592.248241.38550@z14g2000cwz.googlegroups.com>
Message-ID: <Xns9639A1F15A98Bduncanrcpcouk@127.0.0.1>

fred.dixon wrote:

>:) unit test is something on my to-learn list. seems involved and i
> haven't seen any straight forward tutorials yet. as yet i still
> consider myself a hobbyist  at best.
> 
Hmm, I believe you are right. I can't see any straight-forward tutorials 
which use Python. I found a tutorial at onlamp.com, but it doesn't seem to 
me to explain TDD at all clearly.

Kent Beck's book is pretty good except that the main tutorial is in Java 
rather than Python, and the Python section tells you how to write a new 
unit test harness (using TDD). So it won't tell you how to use the unittest 
module, but if you use the Python documentation for that (library 
reference, chapter 5.3) you should be able to follow the Java tutorial 
converting it into Python as you go. (Likewise, I've worked through the 
Python chapter converting that into another language when there wasn't a 
suitable xUnit harness available).

It is one of those things that, once you get the hang of it, really grows 
on you: for me the turning point was the first time I added some code and a 
completely unrelated test which had been working fine up until that point, 
and which could not possibly be affected by the latest change, suddenly 
broke. At that point I realised I had just saved myself considerable 
debugging time as without the tests I wouldn't have realised I had 
introduced a problem until much later.


From radam2_ at _tampabay.rr.com  Sun Apr 10 13:32:20 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Sun, 10 Apr 2005 17:32:20 GMT
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com><mailman.1603.1113027761.1799.python-list@python.org>
	<1113121254.874488.111250@f14g2000cwb.googlegroups.com>
	<mailman.1634.1113131893.1799.python-list@python.org>
Message-ID: <r9ki51hrebthtrt42tb081qh4d338a3pol@4ax.com>

On Sun, 10 Apr 2005 13:18:01 +0200, "Fredrik Lundh"
<fredrik at pythonware.com> wrote:

>Kay Schluehr wrote:
>
>> I fear that Python 3.0 becomes some kind of vaporware in the Python
>> community that paralyzes all redesign efforts on the std-lib.

Even if Python 3.0 never materializes, The documented PEP may still
have an impact on further development of Python. So it might also be
referred to as PEP __future__ .  

Has there been any suggestion of a time line?  If there is a new
release every 18 months, v2.4 to v3.0 would be, 108 months?,  Or would
there be a jump from v2.5 or 2.6, to v3.0?

>that, combined with the old observation that CPython developers,
>when given a choice, prefer to write C code over Python code, is
>making the standard library a lot less useful than it could be.
>
>(if you look at recent releases, most standard lib additions are things
>that are fun for language tinkerers and people looking for many ways
>to write simple algorithms, but very little stuff that's useful for
>scripters
>and application builders.  a C implementation of _bisect.  hello?)

"Fun" things and demos could be put in an "extras". That might do a
lot to clean up the library so that the rest of it can be put in
better perspective.  Also looking at my python24 directory there is a
'tools' dir that probably could be put in the extra package as well.

>if I were in charge, I'd separate 90% of the standard library from the
>core distribution, made sure it ran on multiple implementions (at least
>the two latest CPython implementations, plus what's needed to make
>as much as possible available on the latest Jython and IronPython
>releases), bundled a number of carefully selected external libraries
>(without forcing developers to give up rights and loose control over
>maintenance), refactor the test suite so it could be used both to test
>the library and to see what parts worked properly on your platform,
>and make new releases (for testers and early adopters) available
>regularily.
>
></F>

Larger utility packages could be moved from the "stdlib" but still be
included as separate packages that can optionally be installed from
the python installer.  Idle, distutils, tcl/tk, .. ?

Probably a clearer definition of purpose for the different parts is
needed.  I haven't seen anything documented on that specifically.  Has
it been upto recently, 'more is better' as long as it doesn't break
anything?  With the emphasis on growing the language?

What would definitions of 'purpose' be for?
    '__builtin__'
    '__builtins__'
	packages:
    	'stdlib' ... 'stdlib23', 'stdlib24' # Versions?
        'extras'         # examples, demos, and fun stuff
		other packages included in the install
        packages available at 'pythonpacks.com' (possible?)

	seperately installed applications ?

Is it possible to get some sort of overview on extending python? Does
one already exist?

Cheers,
Ron



From yhdanid at yahoo.com  Sat Apr 30 16:35:59 2005
From: yhdanid at yahoo.com (Obaid R.)
Date: 30 Apr 2005 13:35:59 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<4-CdnYtONKWR3fTfRVn-sA@comcast.com>
Message-ID: <1114893359.535040.261000@o13g2000cwo.googlegroups.com>

Larry Bates,



I truly appreciate the dignified tone of your
response. Kindly allow me to respond.


IN SPITE OF THE BIBLE, NOT BECAUSE OF IT?
=========================================


First I do apologize for the earlier long
discourse; I am afraid this might be just as
long. There is much to discuss and I try
to be through.

Having said that, and to respond to your
point, please be informed that I did not take
any scripture out of context so as to reach a
conclusion of my own. If you'd be kind enough
to point out one incident I will promptly
apologize and will take it back.

With that said, I hope you are fair enough to
agree that if someone makes a claim that then
the same person should back that claim up with
proof. That out of context claim you make,
brother, is made without proof.

Please tell us how Christ the "man" (Acts 2:
22), and "the son of man" (Luke 9: 58) are
not part of the Christian textual sources
or how they were taken out of context. How
is that when it is proclaimed in the Law
attributed to Almighty God that "God is not a
man ... neither the son of man" (Numbers 23:
19) that this part of the Law (given Acts 2:22,
and Luke 9: 58) is not applicable to Christ
PBBUH or any other man and son of man from
the beginning of time until the end of time.

You see, Larry, if someone were to write an
essay and post satellite images in support
of the fact that earth is spherical, anyone
defending the false notion that the earth is
flat can simply counter: "you are taking
things out of context." But these words will
not do, as any fair person can confirm.
Without proof, a claim is what it is: just a
claim. The burden of proof is on the one who
makes the point to prove it, not on the other
party to refute what was not proven.

In my case, proof was offered in defence of
my assertions from what Christian authorities
themselves regard as Christian textual
sources of divine origin. Does that not carry
enough weight for you so as to be convinced?

If people will read in their textual sources
that "God is not a man ... neither the son of
man" and *yet* go on to believe in- and even
argue the exact opposite of that- just
because they have an opinion, then what is the
Bible for then? If people are going to believe
that Christ the "man" (Acts 2:22), and the "son
of man" (Luke 9: 58) is Almighty God Himself
in spite of Numbers (among others), then what
is the point of these people having textual
sources for their beliefs?

Wouldn't it be better if these people got
together, sat down, and wrote a novel and
made a religion out of it? This is what the
Church of Scientology did. Perhaps then that
novel would agree with their man-made
beliefs, namely that "God is a man and is the
son of man" in spite of (Numbers 23: 19)?
That "God will dwell on the earth" in spite
of (1 Kings 8: 27)? That "there are other
'Gods' with God" and that "there is now someone
like unto God" in spite of (Isaiah 46:9)? And
so on and so forth?

After all, let's face it, Larry, the novel is
there inside your (plural) head, and it is
from which you are all reading to us that
Christ PBBUH the "man" and "the son of man"
is actually God; but whether you realize it
or not, you are doing so in spite of the word
of God as found in the Bible, not because of it.
I truly don't know how to make a mention of
this and not appear like I wish to offend
you, which is truly not my intention, but I
must inform you anyway: does the word "anti"
ring any bells?


PLURAL GOD?
===========


Do you believe that God is one or not? Was it
not Christ PBBUH himself who said that the
"Lord our God is one Lord" (as opposed to a
"tri-une" Lord) or was he not? Is there a
single explicit mention of the word "Trinity"
in the entire encyclopaedia of books called
the Bible? Just one? There is none, can you
believe it?


THE DONKEY RIDE
---------------

Please read from the New Testament:

"... and they sat him thereon." (The Donkey)
(Matthew 21:7)

"... and he sat upon him." (The Donkey)
(Mark 11:7)

"... and they set Jesus thereon." (The Donkey)
(Luke 19:35)

"... Jesus ... sat thereon:" (The Donkey)
(John 12:14)


In "Is The Bible God's Word"[1], Ahmed
Deedat writes:

"Could God Almighty have been the author of
this incongruous situation - going out of His
Way to see that all the Gospel writers did
not miss their footing recording of His
"son's" donkey-ride into the Holy City - and
yet "inspiring" them to blackout the news
about His "son's" heavenly flight on the
wings of angels?"


I note the exact same amazing situation here. Why is
it so important to have all the Gospels
mention the donkey incident but not have one single
explicit remark anywhere about what effectively will
decide the eternal fate (repeat: eternal
fate) of many: the alleged "trinity"?
Astonishing, no?


WHY NOT A PENTINITY?
--------------------


Yes "as humans we will never fully understand
the Trinity in this lifetime," but so would
be the case, I put it to you, concerning
"dualnity," (as in two) "quadrupinity",
"pentinity", etc., if there is actually such
words. You see the issue is not merely that our
minds are unable to deal with these
impossible concepts, but also (and equally
importantly) that we must remember that these
concepts were never explicitly mentioned in
the word of God. And so the question that
faces us is this: why a "trinity," and not a
"pentinity"?

Any person can make up things in any aggregate
along the lines of your crude (yet unproven
theory) of what makes God like a man, even when it is
the Bible that states not only that "God is not a
man ... neither the son of man" (Numbers 23:
19), but also that "God is a Spirit" (John
4:24).

Nevertheless, one can add charisma, and the subconscious
mind to your physical, spiritual, and
emotional "aspects" and get that imaginary
"penta-une" false god to be also like man, so
as to make a man into Almighty God, may He be
glorified above all of this. No, Larry. God
is one, period. This is all human invention
and has nothing to do with divine
revelations.

Moreover, do you not see that by saying "Tri"
that you are automatically arguing for
plurality in God? One does not equal three,
Larry, not logically, and not linguistically.
All the universally agreed norms of language
and reason and even algebra are lined up in
defence of God against such illogical
notions. Not that Almighty God needs any
defence.


READ
====

I have read for C. S. Lewis and if I am not
mistaken, seen Josh McDowell lecture on TBN.
But the matter is different here, Larry. I
don't know about McDowell, but I know that C.
S. Lewis was questioning the existence of
God, not whether or not if he believed in a
"trinity" and in Christ PBBUH the "man" and
"son of man" as God that he would then be
doing so in spite of the word of God as
reported in the Bible, not because of it.

And since you made that offer, then allow me
to suggest you read the Qur'an. There is
truly no excuse for anyone not to read it,
especially that it is even available online
for free download.[2]

By the way, did you know that the first verse
revealed on prophet Muhammad PBBUH was
"Read!" upon which the prophet replied to
angel Gabriel PBBUH: "I am not learned." And
this, we hold, is a direct fulfillment of
Isaiah 29:12:

"And the book is delivered to him that is not
learned, saying, Read this, I pray thee: and
he saith, I am not learned."
(Isaiah 29: 12)


Here is the first revealed verses of the Qur'an:

"Read: In the name of thy Lord Who createth,
Createth man from a clot. Read: And thy Lord
is the Most Bounteous, Who teacheth by the
pen, Teacheth man that which he knew not."
(Translation, Qur'an, 96: 1)



OPINION VS. DIVINE REVELATIONS
==============================


You and I are entitled to our opinions, as
is the case for all the people of this earth.
These might even matter to someone. When
it comes to the issues of the unseen, however,
then our opinions (including mine I assure
you!) are just worthless. It is not within us
to have our minds dwell in the unseen. This
is the job of divine revelations. This is
their sole purpose: to reveal to us from the
world of the unseen that which we cannot
grasp or know on our own.

If you and I and everyone else are going to
make our opinions matter more than divine
revelations then not only would we be deceiving
ourselves that our inconsequential opinion is
now divine truth (which it is not), but we
would also be very likely at odds with Almighty
God's truth.



HOW DO WE INHERIT ETERNAL LIFE?
===============================


Your point that there is only one way to God
is a valid one. The issue is not that, but
whether you and I are following that only
way; or to keep to the topic of this thread,
whether Grossi's post accurately describes
that way.

You say that Christ PBBUH is the only way,
but did you know that Christ PBBUH is not
even your designated prophet? Believe it or
not Muhammad PBBUH is. And I know this might
come as a shock, but they both peace and
blessings of Almighty God be upon them PBBUT,
preached the same religion: the worship of
one God, we inherit heaven by keeping the
law and the commandments, i.e. surrendering
one's will to Almighty God, which is Islam in
a nutshell. They even prayed the same! In
Matthew 26:39 we are told that Christ PBBUH
"fell on his face, and prayed!" Must I remind
you who else falls on their faces to pray?

Moreover, and on at least two occasions in
the Bible, Christ PBBUH is explicitly
proclaiming that he was sent only to the lost
sheep of the house of Israel, not to anyone
else of the Gentiles.

"But he answered and said, I am not sent but
unto the lost sheep of the house of Israel."
(Matthew 15: 24) (see also Matthew 10:6).

And so even when he was the way, Christ PBBUH
was so to his people of the house of Israel
only (and this not according to my convenient
opinion, but according to the reported first
person words attributed to Christ PBBUH), and
only in the span of time that he lived on
earth, and hence this excludes people of
times past and future, especially of the
Gentiles.

With that said, it is indeed true that people
will struggle to come to terms that Islam (of
all religions) is God's divine Truth, which
it is. That is, I have come to believe, is
mankind's present test.

Will they contemplate that they might be
utterly misguided, that Islam of all
religions is the God's Truth, that its Arab
prophet PBBUH of the third world is actually
the seal of the Almighty God's prophets, the
comforter that Christ PBBUH foretold? Will
they follow their pride or will they let
their minds decide?

To have Christianity as the Truth temptation of
mankind makes no sense. The Christian West
boasts to have the power, the money, the
science-- they boast they have everything.
Earthly that is. So they must be right in
worshiping a "trinity"? Right?

But that is an easy test, Larry. If Islam was
the Truth and a Muslim failed the test and
worshiped a "trinity" in stead of his one
true God, he might think that he will gain
something in this world. But a Christian who
gives up the "trinity" and his earthly
wealth, power, and pride that comes with the
magic of the West actually seems to many that
he will lose according to the earthly ways.
No? which is the tougher test, Larry, you
tell me.

A tougher test would be to have you choose
between that alleged earthly power and wealth
and Almighty God's truth, even if hidden in
the weakest and most poor of places. Or was
Christ PBBUH wealthy and powerful compared to
the scribes and Pharisees or the Romans?
David PBBUH to Saul? Moses PBBUH to Pharaoh?
Don't you see the pattern here?

If Christ PBBUH was really "son of God" in
the literal sense or "God" as per the
scripture and word of God, we would be the
first to worship, Larry.

"Say: "If (Allah) Most Gracious had a son, I
would be the first to worship." Glory to the
Lord of the heavens and the earth, the Lord
of the Throne (of Authority)! (He is free)
from the things they attribute (to him)!"
(Translation, Qur'an 43: 81-82)



But he is not so. And this according to your
own scriptures. People are making Christ "God,"
and believing him to have been crucified and
later resurrected in spite of "the word of
God" as found in the Bible, not because of
it. The only way you can make your beliefs
agree with your sources is if either you
replace them with something that matches your
claims, or that you expunge those parts from
the present scripture that testify that
Christ is "a man" and "son of man" and that
"God is not a man ... neither the son of man"
and that the resurrected are spirits equal
unto the angels having spiritual bodies. For
while these things are still in your Bible
then you have a serious problem.


Here is an ex-practicing American Christian
sharing his thoughts on a topic related to
our discussion:

"I remember thinking a few years ago, when I
was studying about Christianity and Islam,
that it sure would be nice to have Jesus
around today so that I could go up and ask
him two questions: 1) Is it more important to
believe that God is "One" or "Tri-une"? and
2) What do I need to do in order to get into
Heaven? However, once I thought about it a
bit more, I realized that I already had
answers to these questions! The New Testament
shows how Jesus EXPLICITLY and CLEARLY
answered both of these questions - not to
mention the Qur'an! How could a prophet doing
the work of Almighty God do otherwise? If
something such as the "Doctrine of the
Trinity" or having Jesus as one's "Lord and
Personal Savior" is so important, it would be
unjust - if not criminal - for it not to be
an explicit teaching. It should be kept in
mind that Jesus' audience was made up mostly
of Jews, so when he mentioned "One God", they
certainly understood it in an absolute and
non-Trinitarian way.

"Those of you who don't already know Jesus',
peace be upon him, clear answers to these
direct questions, please see Mark 12:28-34;
Matthew 22:35-40; Matthew 19:16-17; Mark
10:17-19 and Luke 18:18-20.

"On top of all this, the New Testament says
that Jesus, peace be upon him, went around
preaching "the gospel". (See Matthew 4:23,
9:35, 11:5; Mark 1:15, 8:35; Luke 4:18, 7:22,
9:6 and 20:1). Based on this fact, Christians
should be able to COMPLETELY derive their
doctrines and "Gospel message" from the words
of Jesus as reported in the New Testament.
However, everyone who has taken a look at the
evidence should be able to conclude that
Christians certainly cannot do this - they
have to appeal to the epistles of Paul and to
an innovated Trinitarian vocabulary. So what
was this "gospel" that Jesus was preaching?
Was it CLEARLY the Divine Incarnation, the
Atonement and the Trinity? I certainly feel
that the longest and most eloquent sermon in
the New Testament (Matthew 5-7), commonly
know as "The Sermon on the Mount", lends
support to the Pure Monotheism of Islam, not
to Trinitarian Christian belief."[3]



Peace,
Obaid





RESOURCES
=========
[1] Deedat, Ahmed, Is The Bible God's Word, March 1980. April 2005:
http://www.ahmed-deedat.co.za/bible/index.html.
[2] Download a free Qur'an viewer: http://www.divineislam.co.uk/
[3] Squires, Robert, "A Muslim Response to a Christian Response." April
30, 2005:
http://thetruereligion.org/modules/wfsection/article.php?articleid=261&page=0




PS: I posted a response to BrianQ here:
http://groups-beta.google.com/group/microsoft.public.windowsxp.network_web/msg/048f37bac5b14460?hl=en



From Pierre_Rouleau at impathnetworks.com  Fri Apr 22 10:07:04 2005
From: Pierre_Rouleau at impathnetworks.com (Pierre Rouleau)
Date: Fri, 22 Apr 2005 10:07:04 -0400
Subject: Problem deriving a class from the built-in file  object
Message-ID: <ay7ae.22073$Jg5.1129820@news20.bellglobal.com>

Hi all!

I'm trying to extend the functionality of the file object by creating a 
class that derives from file.  MyFile class re-implements __init__(), 
write(), writelines() and close() to augment the capabilities of file.

All works fine, except for one thing:  'print >> myfile'  does not 
execute Myfile.write(), it executes the file.write().   If I execute 
myfile.write() explicitly, then Myfile.write() is called as expected.

I was not expecting that behaviour.  I though that 'print >> afileobject 
' would execute the afileobject.write() as you can easily obtain by 
defining a simple file-like class that implements write() and writeline().

I am running Python 2.3.4.  Can't move to 2.4 yet.

Is it the expected behavior?



# M y F i l e         -- Testing inheritance from file --
# ^^^^^^^^^^^
#
class MyFile(file):
     """ Testing new-style class inheritance from file"""

     #
     def __init__(self, name, mode="r", buffering=-1, verbose=False):
         """Constructor"""

         self.was_modified = False
         self.verbose = verbose
         super(MyFile, self).__init__(name, mode, buffering)
         if self.verbose:
             print "MyFile %s is opened.  The mode is: %s" % (self.name, 
self.mode)

     #
     def write(self, a_string):
         """ Write a string to the file."""

         super(MyFile, self).write(a_string)
         self.was_modified = True

     #
     def writelines(self, sequence):
         """ Write a sequence of strings to the file. """

         super(MyFile, self).writelines(sequence)
         self.was_modified = True

     #
     def close(self) :
         """Close the file."""

         if self.verbose:
             print "Closing file %s" % self.name

         super(MyFile, self).close()
         self.was_modified = False






From Gerald.Klix at klix.ch  Mon Apr 11 10:43:50 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Mon, 11 Apr 2005 16:43:50 +0200
Subject: variables exist
In-Reply-To: <9622d535.0504110552.1e070e8d@posting.google.com>
References: <9622d535.0504110552.1e070e8d@posting.google.com>
Message-ID: <425A8D26.9010905@klix.ch>

try:
  myVariable
except NameError:
  print "Not bound"
else:
  print "Bound"

If you want to distinguish between the local an the global environment:

if globals().has_key( "myVariable" ):
  ...

versus

if locals().has_key( ".....


HTH,
Gerald

fabian schrieb:
> how testing if a variable exists in python as isset in php??
> 
> thanks

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634



From Bill at SynectixLtd.com  Wed Apr 20 07:13:44 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Wed, 20 Apr 2005 11:13:44 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2108.1113922028.1799.python-list@python.org>
Message-ID: <d45dh8$ppl$1@sparta.btinternet.com>

Thanks Jaime,

I'm making gradual progress and am finding it quite satisfying.  Resorted to 
tracing Python in MSVC6 to see what it was trying to IMPORT, which is a bit 
heavy but thank heavens for the sources.

Had not thouight of "adapting" SWIG, and will think about it when I have a 
clearer view of what I am doing (rather deeply embedded at present, trying 
to get one success).  I had not spotted SWIG's wrapper round a wrapper 
(Module.py imports _Module.pyd) but it's reasonable except they go into 
different directories.  And there's the _d too, of course :-(

Many thanks for your help,

    Bill

"Jaime Wyant" <programmer.py at gmail.com> wrote in message 
news:mailman.2108.1113922028.1799.python-list at python.org...
I fight the python24_d.lib problem with swig daily.  The way I got
around it was to modify swig's python configuration module.  Mine was
located at

/lib/swig1.3/python/python.swg

(I'm using cygwin)

At the top, I changed

#include "python.h"

to

#ifdef _DEBUG
  #undef _DEBUG
  #include "python.h"
  #define _DEBUG
#else
  #include "python.h"
#endif

Somewhere in the includes, python uses a pragma telling the MSVC
compiler which library to link the object files against.  Because
you're building a _DEBUG build, you magically get the python24_d.lib
library.

hth,
jw

On 4/18/05, Bill Davy <Bill at synectixltd.com> wrote:
> I downlaoded and installed
> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
>
> I'm trying to build an extension using SWIG 1.3.24 and the linker needs
> python24_d.lib (I do not have the DLL either).  I've not found it in any 
> of
> the
> downloads.
>
> So I tried to download the source to build it myself.  Of
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tar.bz2 and
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz, WinZip (9.0 SR1)
> just says "Error reading header after processing 0 entries".
>
> Additionally, I've had no joy downloading the unzipper
> (ftp://sources.redhat.com/pub/bzip2/v102/bzip2-102-x86-win32.exe) from the
> site cited for the unzipper (http://sources.redhat.com/bzip2/).  It 
> flashed
> up a
> black console window momentarily.
>
> Oh, this is sooooo frustrating! :-(
>
> Can anyone point me in the right direction?
>
> And then I can get to grips with my work.
>
> tia
>     Bill
>
> --
> http://mail.python.org/mailman/listinfo/python-list
> 




From simon.brunning at gmail.com  Wed Apr 20 08:25:07 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 13:25:07 +0100
Subject: building a small calculator
In-Reply-To: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
Message-ID: <8c7f10c605042005255461ff@mail.gmail.com>

On 20 Apr 2005 05:18:17 -0700, aleksander.helgaker at gmail.com
<aleksander.helgaker at gmail.com> wrote:
> Now once the user has select a shape and typed in the lengths required,
> the result is printed and the program quits. What I want to do is make
> the program display the result and then make it wait for the user to
> press return (or something like that) after which the screen will be
> cleared and they'll be back at the main menu.

raw_input('Hit Enter to continue...')

> Also I would like to add option nr 4 to the menu and make that the quit
> command, but what command does python have to stop a program? I tried
> end but that did not work.

sys.exit()

Welcome to Python!

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From fredrik at pythonware.com  Wed Apr  6 07:55:26 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 6 Apr 2005 13:55:26 +0200
Subject: ignoring keywords on func. call
References: <1112787673.095411.266170@o13g2000cwo.googlegroups.com>
Message-ID: <d30ijf$m6s$1@sea.gmane.org>

Brano Zarnovican wrote:

> Q: Can you call 'f' with keywords that will be
>  ignored, without changing 'f's definition ?

no.

> I would like to avoid code like this:
> k = {}
> k['optional'] = 2
> try:
>  f(1, **k)
> except TypeError:
>  f(1)

why would you write code like this?  what's the use case?

> Also, the problem is that I don't know if the TypeError
> was caused by calling 'f' with keywords or somewhere
> "inside" f.
>
> You can also say that I need to specify optional parameters
> on caller side (not called side).

you can use reflection mechanisms to check the target function
signature, but I won't tell you how to do that until you show me
a reasonable use case ;-)

</F> 





From Ian.Sparks at etrials.com  Tue Apr  5 17:22:23 2005
From: Ian.Sparks at etrials.com (Ian Sparks)
Date: Tue, 5 Apr 2005 17:22:23 -0400
Subject: Class, object question.
Message-ID: <41A1CBC76FDECC42B67946519C6677A901915BD5@pippin.int.etrials.com>

Use the *args positional-argument to catch all the positional arguments in the constructor then test them to see what you have and call a kind of sub-init based on that :

class Point:
    def __init__(self,x,y,z):
        self.x = x
        self.y = y
        self.z = z
 
class Vector:
    def __init__(self,*args):
        if len(args) == 3:
            self.setFromValues(args)
        elif len(args) == 2:
            if isinstance(args[0],Point):
                self.setFromPoints(args)
        else:
            raise "Incorrect constructor"
                
        print self.i,self.j,self.k
 
    def setFromValues(self,args):
        self.i,self.j,self.k = args
 
    def setFromPoints(self,args):
        self.i = args[1].x - args[0].x
        self.j = args[1].y - args[0].y
        self.k = args[1].z - args[0].z
 
v = Vector(1,2,3)
 
p1 = Point(2,2,2)
p2 = Point(4,4,4)
 
v2 = Vector(p1,p2)
 
 Hope this helps.
 
 
 
 -----Original Message-----
From: Jeffrey Maitland [mailto:maitj at vianet.ca]
Sent: Tuesday, April 05, 2005 10:04 AM
To: python-list at python.org
Subject: Class, object question.



Hello folks, 

 

The question I am having is something like this. 

 

# ignore the precursing ....  I am using them for easy message formatting

 

from point import *

 

Class vector(point): 

..........def __init___(self, point1, point2):

.................self.i = point2.get_x() - point1.get_x()

.................self.j = point2.get_y() - point1.get_y()

.................self.k =  point2.get_z() - point1.get_z()

 

# methods of vector. Defined here. 

 

What I am wondering is if I have a 2nd init  or something similar to create a vector. Such as what follows and if I can how do I go about implementing it?

 

Class vector(point): 

..........def __init___(self, point1, point2):

.................self.i = point2.get_x() - point1.get_x()

.................self.j = point2.get_y() - point1.get_y()

.................self.k =  point2.get_z() - point1.get_z()

.

..........def __init___(self, i, j, k):

.................self.i = i

.................self.j = j

.................self.k = k

 

That way I can define a vector either using 2 points or if I have the vector data itself?

 

Thanks in advance

 

Jeff

 

 

 

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From s_david_rose at hotmail.com  Mon Apr 25 15:15:54 2005
From: s_david_rose at hotmail.com (GMane Python)
Date: Mon, 25 Apr 2005 15:15:54 -0400
Subject: Pickle an image?
Message-ID: <d4jfi5$6n3$1@sea.gmane.org>

Hey all.
  I have a ( list | tuple | dictionary ) with several graphics in it.
Trying to cPickle it to a file, I get errors.  For instance,
UnpickleableError: Cannon pickle <type 'ImagingCore'> objects.

  Anyone know of a way to get around this?  I'd like to pickle a list or
dictionary of about 5 .JPG images.

Thanks!
Dave





From rune.strand at gmail.com  Mon Apr 18 12:01:26 2005
From: rune.strand at gmail.com (runes)
Date: 18 Apr 2005 09:01:26 -0700
Subject: Behaviour of str.split
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
Message-ID: <1113838796.626344.309630@l41g2000cwc.googlegroups.com>

The behaviour of "".split("*") is not that strange as the splitpoint
always disappear. The re.split() have a nice option to keep the
splitpoint which the str.split should have, I think.

One expectation I keep fighting within myself is that I expect

"mystring".split('') to return  ['m', 'y', 's', 't', 'r', 'i', 'n',
'g']. But I guess it's in line with "There should be one-- and
preferably only one --obvious way to do it." that it's not so.



From martin at v.loewis.de  Sun Apr  3 10:27:32 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 03 Apr 2005 16:27:32 +0200
Subject: string goes away
In-Reply-To: <mailman.1156.1112322721.1799.python-list@python.org>
References: <mailman.1156.1112322721.1799.python-list@python.org>
Message-ID: <424FFD54.6080401@v.loewis.de>

Andreas Beyer wrote:
> If I am getting the docs etc. correctly, the string-module is depricated 
> and is supposed to be removed with the release of Python 3.0.
> I still use the module a lot and there are situations in which I don't 
> know what to do without it. Maybe you can give me some help.

Out of curiosity: when thinking about Python 3.0, what is the timespan
in which you expect that to appear? Before 2010? After 2010? After 2020?

Regards,
Martin


From merkosh at hadiko.de  Thu Apr 28 08:24:30 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Thu, 28 Apr 2005 14:24:30 +0200
Subject: anonymous function objects?
Message-ID: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>

Is it possible to specify anonymous functions, something like:

>>> f = {print "hello world"}
>>> f()
hello world


in Pyton?
Lambda expressions don't work here.

Thanks,
Uwe
        


From postmaster at castleamber.com  Sat Apr 23 22:48:21 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 02:48:21 GMT
Subject: Python or PHP?
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
	<Xns9641B65EDB2Ccastleamber@130.133.1.4>
	<kEAae.2308$5I5.223369@newshog.newsread.com>
Message-ID: <Xns9641DDCA5EB51castleamber@130.133.1.4>

Leif K-Brooks wrote:

> John Bokma wrote:
>> my $sort = $cgi->param( "sort" );
>> my $query = "SELECT * FROM table WHERE id=? ORDER BY $sort";
> 
> And the equivalent Python code:
> 
> cursor.execute('SELECT * FROM table WHERE id=%%s ORDER BY %s' % sort, 
> [some_id])
> 
> You're right, of course, about being *able* to write code with SQL 
> injection vulnerabilities in Python.

I can only speak for Perl for now, but I am sure it has been done, and I 
don't want to know how often :-D (Unless everyone who did pays me 1 USD).

> But it's not even close to being as 
> easy as in PHP.

I didn't deny that :-) Personally I don't like PHPs "magicaddslashquote" 
stuff. It gives beginners the impression that everything is taken care of.

It's like giving someone a house with a door with 7 locks, without telling 
all windows at ground level can't be closed (and the master key is under 
the doormat)

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


From sjmachin at lexicon.net  Wed Apr 20 08:01:56 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 20 Apr 2005 22:01:56 +1000
Subject: trying to understand unicode
References: <426635db$0$2079$626a14ce@news.free.fr>
Message-ID: <o0gc615q3mgi5pr8qqgm3k1alg7pgbp70d@4ax.com>

On 20 Apr 2005 10:58:35 GMT, "F. Petitjean"
<littlejohn.75 at news.free.fr> wrote:

>Python has a very good support of unicode, utf8, encodings ... But I
>have some difficulties with the concepts and the vocabulary.

You're not alone there. But I don't expect the docs for the Python
implementation of Unicode to explain the concepts and vocabulary of
Unicode. That's the job of the Unicode consortium, and they do a
not-unreasonable job of it; see www.unicode.org and in particular 

http://www.unicode.org/Public/UNIDATA/UCD.html

explains all the things that the Python unicodedata module is
implementing.


> The
>documentation is not bad, but for example in reading
>http://docs.python.org/lib/module-unicodedata.html
>I had a long time to figure out what unicodedata.digit(unichr) would
>mean, a simple example is badly lacking.
>
>So I wrote the following script :
>
[snip]
>

>I think that such code snippets should be included in the documentation
>or in a Wiki.
>

Any effort should be directed (IMESHO) towards (a) keeping the URL in
the Python documentation up-to-date [it's not] (b) using the *LATEST*
version of the ucd file when each version of Python is released [still
stuck on 3.2.0 when the current version available from Unicode.org is
4.1.0]
    
[Exit, pursued by a bear.]
[Noises off.]

OK OK don't hit me, Martin, how about instructions on how to DIY,
then?

Cheers,
John



From mark.hellewell at gmail.com  Thu Apr 14 08:47:20 2005
From: mark.hellewell at gmail.com (mark hellewell)
Date: Thu, 14 Apr 2005 13:47:20 +0100
Subject: A little request about spam
In-Reply-To: <740c3aec05041405157cb90625@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
Message-ID: <d3fd6366050414054728665d7e@mail.gmail.com>

On 4/14/05, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> Please do not reply to spam. Replying to spam makes it much harder for
> spam filters to catch all the spam or will produce very many false
> positives. Atleast that's how gmail's filter works. And if you must
> reply, please change the subject line.

Is anybody else finding that Gmails spam filter has started
labelling a lot of python-list emails as spam? About 20
python-list emails a day end up getting caught by their
filter and I'm having to manually go in and mark them
as "Not spam".

mark


From deetsNOSPAM at web.de  Thu Apr 21 18:14:31 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 22 Apr 2005 00:14:31 +0200
Subject: Jython run scripts problem  (2.2.0a0 on Mac OSX 10.3.8)
References: <BiU9e.1094373$Xk.33717@pd7tw3no>
Message-ID: <d498ju$4ee$01$1@news.t-online.com>

scott wrote:

> I installed darwinports and did a "sudo port install jython"
> 
> -------------------------
> 
> scott$ which jython
> /opt/local/bin/jython
> 
> -------------------------
> 
> Jython works in interactive mode as shown below:
> 
> -------------------------
> 
> pyprogs$ cd hotbits/
> hotbits$ ls
> flips50.py      jythoninstall.py randomX          randomflip.py
> hotbits$ jython
> Jython 2.2a0 on java1.4.2_05 (JIT: null)
>  >>> # Truly random (radioactive decay triggered) coin flip
>  >>> from randomX import randomHotBits
>  >>> r = randomHotBits()
>  >>> if r.nextByte() < 0:
> ...     print 'tails'
> ... else:
> ...     print 'heads'
> ...
> tails
> 
> --------------------------
> 
> Jython *doesn't* work if I save the above as a script and try to run it.
> It refuses to run the script and simply starts up in interactive mode:
> 
> ---------------------------
> 
> hotbits$ jython randomflip.py
> Jython 2.2a0 on java1.4.2_05 (JIT: null)
>  >>>
> 
> ---------------------------
> 
> Question:
> How can I run scripts as expected (outside interactive mode)?
> 
> Thanks in advance.

Looks as if the jython shell script does not pass your scriptname as
argument to the interpreter class.

Mine (on linux) looks like this:

"/usr/lib/j2se/1.4/jre/bin/java" -Dpython.home="/home/deets/lib/jython-2.1"
-classpath "/home/deets/lib/jython-2.1/jython.jar:$CLASSPATH"
"org.python.util.jython" "$@"

Note the "$@" - that passes all additional arguments.

-- 
Regards,

Diez B. Roggisch


From reply-to-group at use.net  Sun Apr 10 06:55:05 2005
From: reply-to-group at use.net (T Koster)
Date: Sun, 10 Apr 2005 20:55:05 +1000
Subject: Signals and system
Message-ID: <42590634$0$29863$afc38c87@news.optusnet.com.au>

Hi folks,

My python program needs to download a number of files.  Each file comes 
as a list of mirrors of that file.

Currently, I am using system (os.system) to run wget.  The mechanism is 
in a loop, so that it will try all the mirrors while wget is exiting 
with a non-zero exit status.  This is working fine as long as the user 
feels there is no need to interrupt it.

If wget receives a SIGINT, it stops (as expected) and returns non-zero 
(1 from memory).  The call to system returns the same status code, 
indicating that wget failed, but the program has no knowledge that it 
was a signal the killed wget, rather than a failed download, and as such 
it tries the next mirror.  I would like to be notified if wget received 
any signals, so that the user doesn't need to repetitively press Ctrl-C 
for each and every mirror to get the downloading process to stop.

Can someone point me in the right direction?

Thanks in advance,
Koster


From bdesth.quelquechose at free.quelquepart.fr  Wed Apr 27 17:20:04 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 27 Apr 2005 23:20:04 +0200
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <426ffda2$0$17026$626a14ce@news.free.fr>

monkey a ?crit :
> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
> 
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.
> 
emacs + ECB + python-mode.


From ilias at lazaridis.com  Sat Apr  2 10:13:48 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 02 Apr 2005 18:13:48 +0300
Subject: [EVALUATION] - E03 - jamLang Evaluation Case Applied to Python
Message-ID: <d2mcra$ejm$1@usenet.otenet.gr>

[EVALUATION] - E02 - Support for MinGW Open Source Compiler
http://groups-beta.google.com/group/comp.lang.python/msg/f5cd74aa26617f17

-

In comparison to the E02 thread, now a more practical one.

-

Here is a simple evaluation template (first part) which can be applied 
to the Python language:

http://lazaridis.com/case/lang/index.html

If you like, please post the most elegant solutions (either to sections 
or to the whole document).

I will collect the results and write them down in a document, which will 
compare python with other languages.

This document can serve as an flash-start (for people which simply like 
to take a look on python).

http://lazaridis.com/case/lang/python.html

-

You can see the ruby version here (which shows some limitations, which 
python can hopefully overcome):

http://lazaridis.com/case/lang/ruby.html

.

-- 
http://lazaridis.com


From martin at v.loewis.de  Sat Apr  9 07:37:47 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 09 Apr 2005 13:37:47 +0200
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1524.1112951803.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>
Message-ID: <4257BE8B.9080209@v.loewis.de>

vegetax wrote:
> Why does people have to put wrappers around about half of the standart
> library modules? i have wrappers for urllib,urllib2, [... many more ...]
> 
> I mean is this normal?

Not sure what "this" is :-) Is it normal that people write wrappers
around libraries? Yes, most certainly so. I see people writing wrappers
around the C++ library, around Java collection classes (*), around .NET
classes, ... essentially for every library that somebody writes,
somebody else will write a wrapper - unless the library is useless.

Is it normal that *you* write this many wrappers? I don't know you
good enough to answer that question :-)

Is it good that people write these wrappers? I don't think so. Is it
the library's fault? I don't think so, either. People write these
wrappers because they cannot remember how to use the library. This
is not because the library is hard to remember, but because people
cannot remember much at all - except for the things they have done
themselves (**). So they write a library wrapper, and doing so takes
them enough time to ingrain their own API into their own memory.
If somebody else wrote the very same wrapper for them, they still
would not like to use it.

So what can be done? Not much, I think - no matter what the
library reorganization is, people will continue to write wrappers
around it. That is not to say that a library reorganization couldn't
be helpful to some people - if people find enough energy, a library
reorganization will happen. Some will like it, some will hate it.

I personally try to avoid library wrappers like the plague. It makes
my code harder to write, but easier to read.

Regards,
Martin

(*) Just look at the Apache Commons library. People write wrappers
for stuff like

  bool isEmptyString(String s){
   return s==null || s.length()==0;
  }

(**) of course, most people can only remember a subset of these,
as well.


From mrtact at gmail.com  Wed Apr  6 16:27:47 2005
From: mrtact at gmail.com (Tim Keating)
Date: 6 Apr 2005 13:27:47 -0700
Subject: Best editor?
In-Reply-To: <mailman.1421.1112771646.1799.python-list@python.org>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
	<SqJ4e.771$r6.203@news.itd.umich.edu>
	<mailman.1421.1112771646.1799.python-list@python.org>
Message-ID: <1112819267.956169.107830@l41g2000cwc.googlegroups.com>

I bought the Komodo personal edition, and at only $30, it is worth it
for the regular expression toolkit alone.



From grig.gheorghiu at gmail.com  Tue Apr  5 20:22:49 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 5 Apr 2005 17:22:49 -0700
Subject: oracle interface
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <1112746969.528029.184120@l41g2000cwc.googlegroups.com>

I subscribe to the other posters' opinion: cx_Oracle is what I use on
Windows, Linux and Solaris. Works great cross-platform and across
Oracle versions (I use it with Oracle 9 and 10, haven't tried 8 yet).

Grig



From bokr at oz.net  Tue Apr 26 22:07:44 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 27 Apr 2005 02:07:44 GMT
Subject: What's do list comprehensions do that generator expressions
	don't?
References: <86ll77pgqz.fsf@guru.mired.org><mailman.2430.1114408769.1799.python-list@python.org><pan.2005.04.25.19.29.02.291034@jerf.org><du7wtqq8ukz.fsf@mozart.cc.tut.fi><mailman.2489.1114462128.1799.python-list@python.org><426ddda7.553554359@news.oz.net>
	<861x8ynha0.fsf@guru.mired.org>
	<mailman.2527.1114536283.1799.python-list@python.org>
Message-ID: <426ef346.3509746@news.oz.net>

On Tue, 26 Apr 2005 13:22:28 -0400, "Terry Reedy" <tjreedy at udel.edu> wrote:

>
>"Mike Meyer" <mwm at mired.org> wrote in message
>> The question under these circumstances is then: do you want bare
>> genexp to mean something? Right now, it's a syntax error. But there's
>> no reason you couldn't have:
>>
>>   y = x for x in stuff
>>
>> assign a generator object to y.
>
>Since this was considered, there is a reason why we don't have this.  As I 
>remenber, but vaguely, Guido's reasoning was both stylistic and technical, 
>but you'd have to check the archives for more.
>
Because it is too reminiscent of a lambda expression assignment? ;-)

Regards,
Bengt Richter


From claird at lairds.us  Sat Apr  2 14:08:01 2005
From: claird at lairds.us (Cameron Laird)
Date: Sat, 02 Apr 2005 19:08:01 GMT
Subject: Pseudocode in the wikipedia
References: <mailman.1210.1112394097.1799.python-list@python.org>
Message-ID: <ip53i2-7qm.ln1@lairds.us>

In article <mailman.1210.1112394097.1799.python-list at python.org>,
Ivan Van Laningham  <ivanlan at pauahtun.org> wrote:
			.
			.
			.
>> >>> 25
>> 25
>> >>> (_ | _)
>> 25
>> >>>
>> 
>> There's clearly some interesting biometrics research to be done here,
>> although there is a well-known ass-capturing attack based on readily
>> commercially available machines from Xerox that might make it hard to make
>> an ass-based identity system resistant to attacks.
>
>http://www.jacquelinestallone.com/rumps.html
>
>Metta,
>Ivan
>
>PS:  I don't think this is an 0401 page; it's been there a while.
			.
			.
			.
Welcome back, Ivan.  Your follow-ups make one wonder about the
span of related topics clp has been missing in your absence.


From stnchris at xmission.com  Tue Apr 19 18:47:01 2005
From: stnchris at xmission.com (Steve Christensen)
Date: Tue, 19 Apr 2005 22:47:01 +0000 (UTC)
Subject: build flow? SCons? AAP? process creation?
References: <1113420994.118316.245190@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd6b2j5.2d.stnchris@xmission.xmission.com>

In article <1113420994.118316.245190 at g14g2000cwa.googlegroups.com>, corey.coughlin at comcast.net wrote:
> Hey guys, here's a little question.  I'm looking for something like a
> build system, where I can set up a bunch of jobs with dependencies, and
> have them run in parallel.  Ideally, I'd like a system where jobs can
> be run in parallel, all the stdout and stderr for each job is kept in a
> database of some kind, jobs can be anything that can be run at a
> command line, and a failing job won't cause the whole run to fail.
> I've been looking into some of the standard stuff (GNU make) and some
> of the more pythonic stuff like SCons and AAP.  SCons seems to do
> parallel execution, which is nice, but I can't figure out from the docs
> if it's possible to keep stdout and stderr somewhere.  AAP seems to
> have a nice interface, but it doesn't do parallel.

Here's something from the SCons Wiki:
    http://www.scons.org/cgi-bin/wiki/BuildLog



-Steve

-- 
So if you people can't figure out what my birthday is based on subtle
hints and vague statements made at random intervals then I'm beginning
to think that you really don't care. -- Dean Lenort, a.r.k.


From snail at objmedia.demon.co.uk  Tue Apr 12 04:33:16 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Tue, 12 Apr 2005 09:33:16 +0100
Subject: NSInstaller Vs. Inno Setup
References: <1113250756.207904.29670@f14g2000cwb.googlegroups.com>
	<425AF329.6030603@v.loewis.de>
Message-ID: <ik$hPtBMf4WCFwlx@objmedia.demon.co.uk>

In message <425AF329.6030603 at v.loewis.de>, Martin v. L?wis 
<martin at v.loewis.de> writes
>dcrespo wrote:
>> Any comments?
>
>MSI.

MSI fails on every NT 4 system I've seen. Even with all the patches from 
Microsoft. Inno Setup wins every time in this situation. Its also a lot 
less hassle than MSI for what I need.

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From henrikpierrou at hotmail.com  Wed Apr 20 03:32:20 2005
From: henrikpierrou at hotmail.com (henrikpierrou at hotmail.com)
Date: 20 Apr 2005 00:32:20 -0700
Subject: Python instances
Message-ID: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>

Hi,

How do python instances work?
Why does the code at the end of my posting produce this output:

list in a:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
list in b:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

instead of

list in a:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
list in b:
[]

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

class MyClass:
    list = []

    def add(self, x):
        self.list.append(x)

    def printer(self):
        print self.list

a = MyClass()
b = MyClass()

for n in range(10):
    a.add(n)

print "list in a:"
a.printer()
print "list in b:"
b.printer()

/H



From eurleif at ecritters.biz  Sat Apr  2 05:18:25 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 02 Apr 2005 10:18:25 GMT
Subject: Simple thread-safe counter?
In-Reply-To: <3b70ntF6fd45tU1@individual.net>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
	<3b70ntF6fd45tU1@individual.net>
Message-ID: <Rju3e.719$bI3.67477@monger.newsread.com>

Artie Gold wrote:
> Skip Montanaro wrote:
> 
>>     counter = Queue.Queue()
>>     def f():
>>         i = counter.get()
> 
> I think you need:
>           i = counter.get(True)

The default value for the "block" argument to Queue.get is True.


From vegeta.z at gmail.com  Tue Apr  5 12:58:17 2005
From: vegeta.z at gmail.com (vegetax)
Date: Tue, 05 Apr 2005 12:58:17 -0400
Subject: Python Google Server
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<mailman.1375.1112701816.1799.python-list@python.org>
	<1112706994.922193.5610@z14g2000cwz.googlegroups.com>
	<mailman.1389.1112713620.1799.python-list@python.org>
	<1112714083.674249.44370@g14g2000cwa.googlegroups.com>
Message-ID: <d2ufve$h5r$1@sea.gmane.org>

Fuzzyman wrote:

> Of course - sorry. Thanks for the fix. Out of interest - why are you
> using this... just for curiosity, or is it helpful ?

because is fun to surf on the google cache, =)




From grante at visi.com  Mon Apr 25 12:03:30 2005
From: grante at visi.com (Grant Edwards)
Date: Mon, 25 Apr 2005 16:03:30 -0000
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
Message-ID: <116q56ie4vqtu04@corp.supernews.com>

On 2005-04-25, dcrespo <dcrespo at gmail.com> wrote:
> Hi all...
>
> I think wxPython is much better than PyGTK. First of all, PyGTK needs
> the GTK runtime installed, whereas wxPython is entirely Python's
> modules,

Huh?  wxPythonGTK requires GTK runtimes as well:

$ ldd libwx_gtk2_core-2.5.so> /tmp/foo
	linux-gate.so.1 =>  (0xffffe000)
	libz.so.1 => /lib/libz.so.1 (0x4028d000)
	libdl.so.2 => /lib/libdl.so.2 (0x4029e000)
	libgtk-x11-2.0.so.0 => /usr/lib/libgtk-x11-2.0.so.0 (0x402a1000)
	libgdk-x11-2.0.so.0 => /usr/lib/libgdk-x11-2.0.so.0 (0x40585000)
	libatk-1.0.so.0 => /usr/lib/libatk-1.0.so.0 (0x405fa000)
	libgdk_pixbuf-2.0.so.0 => /usr/lib/libgdk_pixbuf-2.0.so.0 (0x40616000)
        [...]

If you run wxPython on top of some other toolkit, then you'll
need that toolkit's runtimes instead of GTK.

-- 
Grant Edwards                   grante             Yow!  Yow! Those people
                                  at               look exactly like Donnie
                               visi.com            and Marie Osmond!!


From bearophileHUGS at lycos.com  Fri Apr  1 06:41:49 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Apr 2005 03:41:49 -0800
Subject: Suggesting methods with similar names
In-Reply-To: <mailman.1107.1112235413.1799.python-list@python.org>
References: <1112188872.175741.225080@f14g2000cwb.googlegroups.com>
	<424b3db3.107335950@news.oz.net>
	<mailman.1107.1112235413.1799.python-list@python.org>
Message-ID: <1112355709.500870.51200@l41g2000cwc.googlegroups.com>

Suggesting method names based on a wrong method name can be useful, but
I think the "smart help" can be improved: it can also be useful to have
a suggestion for method names on the basis on a short description (or
keywords) about what I want to do to/with the object. Maybe some people
here can give me some suggestions on how to do this.

I think I can add a
Keywords: xxxx, xxx, xxxx.
final part to each docstring of the methods, so a kind of little search
engine can search for the few most fitting methods based on the user
text search query, and on the methods keywords+doc texts.

User query example:
"How to rotate the object"

Result (a short ranked list of method names that can perform that
operation):
rotate, flip, pivot, mirror

(Note: the query is inserted calling a "help" method, or something
similar, etc. It doesn't require any magic.)
Do you know any little search engine that can be used for this purpose?

Thank you,
Bearophile



From stuff at slinkp.com  Wed Apr 13 15:52:05 2005
From: stuff at slinkp.com (Paul Winkler)
Date: 13 Apr 2005 12:52:05 -0700
Subject: HTTPSConnection script fails, but only on some servers (long)
References: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
	<d3ftlj$r3c$1@sea.gmane.org>
	<mailman.1824.1113387514.1799.python-list@python.org>
	<1113416410.167018.216860@g14g2000cwa.googlegroups.com>
Message-ID: <1113421925.843281.233620@l41g2000cwc.googlegroups.com>

pyg... at gmail.com wrote:
> I have a couple of recipes at the python cookbook site, that allows
> python to do proxy auth and ssl. The easiest one is:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/301740

Thanks for that John!
I gave it a whirl, changed the user, passwd, host, and phost and gave
it a run.
It instantly barfs with this:

Traceback (most recent call last):
  File "testYetAnotherHttpsClient.py", line 25, in ?
    ssl = socket.ssl(proxy, None, None)
  File "/usr/lib/python2.3/socket.py", line 73, in ssl
    return _realssl(sock, keyfile, certfile)
socket.sslerror: (8, 'EOF occurred in violation of protocol')

Hmm. On reflection, I don't think the problem solved by your script is
the
same as mine. As I understand it, your script connects to an
SSL-protected
server on port 443 by going through a plain HTTP proxy on port 80?
That's not the case for me.  The server on port 80 is behind the
server on port 443.



From steven.bethard at gmail.com  Thu Apr 21 12:54:54 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 21 Apr 2005 10:54:54 -0600
Subject: deprecation of has_key?
In-Reply-To: <mailman.2230.1114097442.1799.python-list@python.org>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>	<mailman.2224.1114094137.1799.python-list@python.org>	<TIKdnV6iPosyIPrfRVn-2w@comcast.com><mailman.2226.1114095804.1799.python-list@python.org>	<dfWdnZdcUZbqX_rfRVn-vw@comcast.com>
	<mailman.2230.1114097442.1799.python-list@python.org>
Message-ID: <f4ednXDcIqpBR_rfRVn-tA@comcast.com>

Fredrik Lundh wrote:
> Steven Bethard wrote:
> 
>>> For me dictionary is a collection of key-value pairs, but not a
>>> collection of keys (that's what set is).
>>
>> Ahh, ok.  Now I understand.  I think you could probably search the 
>> python-dev archives and see why the decision was made as it was.  For 
>> pretty much all my purposes, "key in dict" is much more useful than 
>> "item in dict".  Practicality beats Purity and all. ;)
> 
> well, for all my purposes, I find that "dict.get(key)" (or sometimes 
> "dict[key]" is a lot more useful than has_key and in...

True enough.  Grepping through my (small) code base, I found only five 
uses of "key in dict" style code...

STeVe


From ola.natvig at infosense.no  Wed Apr 27 02:44:36 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Wed, 27 Apr 2005 08:44:36 +0200
Subject: python equivalent of php implode
In-Reply-To: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
Message-ID: <kvo3k2-s9c.ln1@pluto.i.infosense.no>

Maksim Kasimov wrote:
> 
>   in php-scripts, to insert data to database, i'm doing like this:
> 
>   ...
>   $query_param = array(
>     'field0' => 1,
>     'field1' => 3,
>     'field2' => $var2,
>     'field3' => $var3,
>   );
>   ...
> 
>   $sql = "INSERT INTO $table (".implode(", ", 
> array_keys($query_param)).") VALUES ('".implode("','", $query_param)."')";
> 
>   how it can be done, using python (elegantly, without cycles)?
> 
> 

sql = "INSERT INTO %s (%s) VALUES (%s)" % (table, ','.params.keys()), 
','.join(param.values()))

should do the trick.


-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From abuse at solumslekt.org  Sat Apr  9 06:03:44 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Sat, 09 Apr 2005 12:03:44 +0200
Subject: Problem with national characters
References: <MmW2e.4463$SL4.89670@news4.e.nsc.no>
	<424cdd51$0$21909$9b622d9e@news.freenet.de>
Message-ID: <4MN5e.5727$SL4.116043@news4.e.nsc.no>

"Martin v. L?wis" skrev:

> You need to do locale.setlocale(locale.LC_ALL, "") to get
> locale-specific upper-casing.

That makes a lot of sense. Thank you.

>>> 'f?r'.upper()
'F\xf8R'
>>> 'F?R'
'F\xd8R'
>>> import locale
>>> locale.setlocale(locale.LC_ALL, "")
'no_NO'
>>> 'f?r'.upper()
'F\xd8R'
>>> 'F?R'
'F\xd8R'

I must make a note of the LC_ALL variable in the installation README. 
I for one have been running Gentoo Linux for two years without ever
setting the locale, - but now I've finally gotten around to write my
own /etc/env.d/02locale file :-)

> Notice that things are more difficult in the Windows terminal window,
> as this uses an encoding different from the one that the system's
> locale functions expect.

The real input will come from a GUI or a browser interface, so the
Windows terminal problem isn't really an issue.
-- 
Leif Biberg Kristensen
http://solumslekt.org/


From tjreedy at udel.edu  Mon Apr  4 19:56:40 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 4 Apr 2005 19:56:40 -0400
Subject: sparse sets of integers?
References: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
Message-ID: <d2sulm$v53$1@sea.gmane.org>


"Dan Stromberg" <strombrg at dcs.nac.uci.edu> wrote in message 
news:pan.2005.04.04.21.52.58.910482 at dcs.nac.uci.edu...
>
> Does anyone have a python implementation (or python C/C+ extension) that
> would allow me to perform set operations (union, intersection, 
> difference,
> number of elements, &c) over very large collections of integers?
>
> Some of the sets may have over 10**11 (probably less than 10**13
> though) integers in them, but there will tend to be runs of integers 
> being
> included or not included, so there might be 10**5 consecutive integers
> included, then 10**4 that are not included, and then another 10**6 that
> are.

I would call this chunky rather than sparse.  Or a set (ordered list) of 
integer ranges, which I am sure is how you implemented it before.  I did 
not find anything Googling 'Python integer range set' but would look harder 
before coding.

Terry J. Reedy





From serpent17 at gmail.com  Wed Apr 27 12:00:44 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 27 Apr 2005 09:00:44 -0700
Subject: How do I parse this ? regexp ?
In-Reply-To: <87mzrkxnz2.fsf@jupiter.g2ctech>
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
	<87mzrkxnz2.fsf@jupiter.g2ctech>
Message-ID: <1114617644.857534.307750@g14g2000cwa.googlegroups.com>

Hello,

 I am not understanding your answer, but I probably asked the wrong
question :-)

I want to remove the commas, and square brackets [ and ] characters and
rewrite this whole line (and all the ones following in a text file
where only space would be a delimiter. How do I do this ?

I have tried this:

f = open(name3,'r')
r = r"\d+\.\d*"
for line in f:
cols = line.split()
data1 = re.findall(r,line)

and then I don't know what to do with either cols nor data1

Jake.



From greg at cosc.canterbury.ac.nz  Tue Apr 19 23:38:18 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 15:38:18 +1200
Subject: pre-PEP: Simple Thunks
In-Reply-To: <Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
Message-ID: <3cm15nF6m5qgiU1@individual.net>

Brian Sabbey wrote:

> do f in with_file('file.txt'):
>     print f.read()

I don't like this syntax. Try to read it as an English sentence:
"Do f in with file 'file.txt'". Say what???

To sound right it would have to be something like

   with_file('file.txt') as f do:
     print f.read()

But, while that works with this particular function
name, and others of the form "with_xxx", there are
bound to be other use cases which would require
different words or word orders in order not to sound
contrived.

It's very difficult to come up with a good syntax for
this that isn't skewed towards one kind of use case.
That's probably a large part of the reason why nothing
like it has so far been seriously considered for
adoption.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From Sibylle.Koczian at Bibliothek.Uni-Augsburg.de  Wed Apr 13 08:11:22 2005
From: Sibylle.Koczian at Bibliothek.Uni-Augsburg.de (Sibylle Koczian)
Date: Wed, 13 Apr 2005 14:11:22 +0200
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <Pokerface.1ndl7k@no-mx.tacticalgamer.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<Pokerface.1ndl7k@no-mx.tacticalgamer.com>
Message-ID: <3c4gjaF6kr60dU1@news.dfncis.de>

Pokerface schrieb:
> Gotta say, is we let this man write the docs for us, they'll sure as
> sugar be more colorful than the ones we presently have, even if he
> doesn't manage to make them better.
> 
> "The [insert relation]****ing Python interpreter is usually installed
> as /usr/local/bin/python on those g*dd*mn machines where it is
> available; putting /usr/local/bin in your ****ing Unix shell's search
> path makes it possible to start it by typing the command python to the
> shell.  F***er."
> 
> 
Please think of people with other native languages who can possibly read 
the existing documentation without a dictionary but would certainly need 
one for this.

Koczian


From python.tr at gmail.com  Sat Apr  9 02:04:09 2005
From: python.tr at gmail.com (Hasan D)
Date: Sat, 9 Apr 2005 09:04:09 +0300
Subject: Https Form Page
In-Reply-To: <259dbf1b66d0acb9df2e992507914428@flowtheory.net>
References: <764176c10504081313501b1e1f@mail.gmail.com>
	<87b1fe089f338ada9e53838fd1f7d90e@flowtheory.net>
	<764176c105040815512969ae22@mail.gmail.com>
	<259dbf1b66d0acb9df2e992507914428@flowtheory.net>
Message-ID: <764176c10504082304cc6f3fa@mail.gmail.com>

 I cant figure out, always gives me the form page. Everything looks ok but ?


On Apr 9, 2005 2:07 AM, Joshua Ginsberg <listspam at flowtheory.net> wrote:
> If url is your formpage and your formdata is correct, it should work.
> 
> Do you need to have a cookie set? Is it 304 redirecting you?
> 
> -jag
> 
> 
> 
> Joshua Ginsberg -- joshg at brainstorminternet.net
> Brainstorm Internet Network Operations
> 970-247-1442 x131
> On Apr 8, 2005, at 4:51 PM, Hasan D wrote:
> 
> > Thank you for fast reply.
> > Your program works fine. But when i print the https_response it gives
> > me the form page. I want to send the form and print the result page.
> >
> >
> >
> > On Apr 9, 2005 12:19 AM, Joshua Ginsberg <listspam at flowtheory.net>
> > wrote:
> >> Try:
> >>
> >> import urllib2, urllib
> >> formdata = urllib.urlencode({'a':1,'b':2})
> >> request = urllib2.Request(url)
> >> request.add_data(formdata)
> >> opener = urllib2.build_opener(urllib2.HTTPSHandler())
> >> urllib2.install_opener(opener)
> >> fs = urllib2.urlopen(request)
> >> https_response = fs.read()
> >> https_headers = fs.info().headers
> >> https_mimetype = fs.info().type
> >>
> >> -jag
> >>
> >>
> >>
> >> Joshua Ginsberg -- joshg at brainstorminternet.net
> >> Brainstorm Internet Network Operations
> >> 970-247-1442 x131
> >> On Apr 8, 2005, at 2:13 PM, Hasan D wrote:
> >>
> >>> I'm new on this httplib and urllib. Actually I dont know what should
> >>> i
> >>> use.
> >>>
> >>> I want to fill the form in a "https" page , and return the result . I
> >>> write a test code but always gives errors. I cant find any good
> >>> example about this on the net. What should I do about this ?
> >>>
> >>>
> >>> import urlparse,urllib,httplib,string,htmllib,formatter
> >>>
> >>> #port="443"
> >>> target="https://www.abc.com/"
> >>> params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
> >>> http=httplib.HTTP("https://www.abc.com/",443)
> >>>
> >>> data='Name=x&Adress=x'
> >>> headers = {"Content-type":
> >>> "application/x-www-form-urlencoded","Accept": "text/plain"}
> >>>
> >>> print "Sending Data On "+target+"...\n"
> >>> http.putrequest("POST",target+"/xxx.asp?q=7&b=11",params)
> >>>
> >>> response = http.getresponse()
> >>> print response.status, response.reason
> >>>
> >>> http.send(data)
> >>>
> >>> code,msg,headers = http.getreply()
> >>>
> >>> print "HTTP Code : ",str(code)
> >>> print "HTTP Connection : ",msg
> >>> print "HTTP headers : \n",headers,"\n"
> >>>
> >>> HTML=http.getfile().read()
> >>> MyParser=htmllib.HTMLParser(formatter.NullFormatter())
> >>> MyParser.feed(HTML)
> >>> # Print all the anchors from the results page
> >>> print MyParser.anchorlist
> >>> --
> >>> http://mail.python.org/mailman/listinfo/python-list
> >>>
> >>
> >>
> >> --
> >> http://mail.python.org/mailman/listinfo/python-list
> >>
> >>
> >>
> >
> 
> 
> 
>


From opengeometry at yahoo.ca  Fri Apr 22 02:41:46 2005
From: opengeometry at yahoo.ca (William Park)
Date: Fri, 22 Apr 2005 02:41:46 -0400
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
Message-ID: <f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>

Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
> On Sun, 17 Apr 2005 02:16:04 +0000, William Park wrote:
> > Care to post more details?
> 
> The XML file I need to parse contains information about genes.
> So the first element is a gene and then there are a lot sub-elements with
> sub-elements. I only need some of the informtion and want to store it in
> my an object called gene. Lateron this information will be printed into a
> file, which in it's turn will be fed into some other program.

You have to help us a little more here.  Which info do you want to
extract from below example?

> <Entrezgene-Set>
> ...
> </Entrezgene-Set>

-- 
William Park <opengeometry at yahoo.ca>, Toronto, Canada
Slackware Linux -- because it works.


From Scott.Daniels at Acm.Org  Wed Apr 20 12:54:00 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 20 Apr 2005 09:54:00 -0700
Subject: pythonic use of properties?
In-Reply-To: <mailman.2009.1113685549.1799.python-list@python.org>
References: <5e183f3d05041420053ecd0ee@mail.gmail.com>	<d3nf2n$fm5$1@sea.gmane.org>	<5e183f3d05041507417d3fa81d@mail.gmail.com>
	<mailman.2009.1113685549.1799.python-list@python.org>
Message-ID: <42668374$1@nntp0.pdx.net>

Michael Spencer wrote:
   <a generally excellent summary of when and what to validate>

> ... of course there are cases where data must be validated.  For 
> data stored in one type, and used in many contexts - I would validate 
> where stored. If the reverse, then validate at the point it is used...

The big exception to this rule is "temporal" -- data used long after
storing is a candidate for more validation.  This rule applies "in
spades" for persistent data (stored in any form of database).  The
rule is to catch issues where you can figure them out.

--Scott David Daniels
Scott.Daniels at Acm.Org


From eurleif at ecritters.biz  Sat Apr 23 17:40:47 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 23 Apr 2005 21:40:47 GMT
Subject: Python or PHP?
In-Reply-To: <mailman.2346.1114273424.1799.python-list@python.org>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org>	<IFEpEp.7Gz@bath.ac.uk>
	<mailman.2346.1114273424.1799.python-list@python.org>
Message-ID: <zhzae.2305$5I5.222813@newshog.newsread.com>

Mage wrote:
> However one of the worst cases is the sql injection attack. And sql
> injections must be handled neither by php nor by python but by the
> programmer.

But Python's DB-API (the standard way to connect to an SQL database from 
Python) makes escaping SQL strings automatic. You can do this:

cursor.execute('UPDATE foo SET bar=%s WHERE id=%s', ["foo'bar", 123])

And "foo'bar" will be implicitly escaped to whatever is appropriate for 
your database. How's that for Python handling SQL injection automatically?


From pfkeb at kunz-pbdsl1.stanford.edu  Thu Apr 28 10:08:07 2005
From: pfkeb at kunz-pbdsl1.stanford.edu (Paul F. Kunz)
Date: 28 Apr 2005 07:08:07 -0700
Subject: Fast plotting?
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
	<5bbea$42706a5a$d1b714b9$22961@PRIMUS.CA>
Message-ID: <7td5sfxad4.fsf@kunz-pbdsl1.stanford.edu>

William Park <opengeometry at yahoo.ca> writes:

> Russell E. Owen <rowen at cesmail.net> wrote:
> > Can anyone recommend a fast cross-platform plotting package for 2-D 
> > plots?
> > 
> > Our situation:
> > We are driving an instrument that outputs data at 20Hz. Control is via 
> > an existing Tkinter application (which is being extended for this new 
> > instrument) that runs on unix, mac and windows. We wish to update 5-10 
> > summary plots at approximately 2 Hz and will be offering controls to 
> > control the instrument and the plots, preferably (but not necessarily) 
> > mixed in with the plots.
> 
> That's 10-20 plots per second.  The only GUI plotter that I know is
> 'gnuplot', and I don't know if it will spit out anything at 10-20Hz.
> For character plots (like old days terminal), it has speed but ugly to
> look at.
> 
   HippoDraw is quite fast and scriptable from Python

http://www.slac.stanford.edu/grp/ek/hippodraw


From codecraig at gmail.com  Tue Apr 19 10:02:05 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 07:02:05 -0700
Subject: Update Label when Scale value changes
In-Reply-To: <9Z79e.969$cL6.77@news.get2net.dk>
References: <1113916746.841747.274550@l41g2000cwc.googlegroups.com>
	<9Z79e.969$cL6.77@news.get2net.dk>
Message-ID: <1113919325.498539.323190@o13g2000cwo.googlegroups.com>

Yea that is what i needed.  Can you recommend a good Tkinter site (or
book, but preferably site) about learning Tkinter.

I've tried:
http://www.python.org/moin/TkInter
http://www.pythonware.com/library/tkinter/introduction/

But I am looking for more about events, etc.

Thanks



From steven.bethard at gmail.com  Wed Apr  6 14:28:42 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 06 Apr 2005 12:28:42 -0600
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <mailman.1444.1112811259.1799.python-list@python.org>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>	<mailman.1305.1112633442.1799.python-list@python.org>	<1112787265.022988.205630@z14g2000cwz.googlegroups.com>
	<mailman.1444.1112811259.1799.python-list@python.org>
Message-ID: <bNWdnWZC-vnKt8nfRVn-gw@comcast.com>

Michael Spencer wrote:
> BTW, as I mentioned in a previous comment, I believe this would be more 
> plainly written as type(self).__new__(), to emphasize that you are 
> constructing the object without initializing it.  (There is a 
> explanation of __new__'s behaviour at 
> http://www.python.org/2.2/descrintro.html#__new__).

There is also now documentation in the standard location:

http://docs.python.org/ref/customization.html

And just to clarify Michael's point here, writing this as __new__ means 
that __init__ is not called twice:

py> class C(object):
...     def __new__(cls):
...         print '__new__'
...         return super(C, cls).__new__(cls)
...     def __init__(self):
...         print '__init__'
...
py> c = C()
__new__
__init__
py> c2 = type(c)(); c2.__init__()
__new__
__init__
__init__
py> c3 = type(c).__new__(C); c3.__init__()
__new__
__init__

But definitely check the docs for more information on __new__.  Some of 
the interworkings are kind of subtle.

STeVe


From bokr at oz.net  Wed Apr 13 06:19:31 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 13 Apr 2005 10:19:31 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
Message-ID: <425cefae.268278123@news.oz.net>

On Wed, 13 Apr 2005 02:06:11 -0700, Dick Moores <rdm at rcblue.com> wrote:

>I need to figure out how to compute pi to base 12, to as many digits as 
>possible. I found this reference, 
><http://mathworld.wolfram.com/Base.html>, but I really don't understand 
>it well enough. Could someone show me how to do what I need?
>
>Thanks,
>
>Dick Moores
>rdm at rcblue.com
>
See if this is enough digits for homework? ;-) 

(Digits A and B are 10 and 11 in decimal respectively)

3184809493B918664573A6211BB151551A05729290A7809A492742140A60A55256A0661A03753A3AA54805646880181A
3683083272BBBA0A370B12265529A828903B4B256B8403759A71626B8A54687621849B849A8225616B442796A31737B2
29B2391489853943B8763725616447236B027A421AA17A38B52A18A838B01514A51144A23315A3009A8906B61B8B48A6
2253A88A50A43BA0944572315933664476B3AABB77583975120683526B75B462060BB03B432551913772729A21475535
31793848A0402B999B5058535374465A68806716644039539A8431935198527B9399B112990ABB0383B107645424577A
51601B3624A88B7A676A3992912121A213887B92873946A61332242217AA7354115357744939112602BA4B888818A326
9222B528487747839994AB223B65B8762695422822669BA00A586097842A51750362073B5A768363B21BB1A97A4A1944
47749399804922175A068A46739461990A2065BB0A30BBAB7024A585B1A84428195489784A07A331A7B0A1574565B373
B05B03A5A80A13AB87857734679985558A5373178A7B28271992A3894A5776085083B9B238B2220542462888641A2BAB
8B3083AB49659172A312B78518654494A068662586A181835A64440B2970A12281397589881536720890580103288144
9223841428763329617531239B9A657405584014534390B587625606BB80923795944B43757A431B039556282978A6A4
9590553490BA1844947175637A908247B50127722464441380A852B0847B5813019BB70A67663B426565434069884476
132193344BA55A2128A03838974606B851B2979321A408067225A5AA4B3464A1A17473595333909AB9127079655B3164
B68B9B28A9B818A220A025AB0934203995B7A62A7AA739355340539BA3182905B193905603A43B660B9426A922946971
44A896A5B2339358BB2B7294BB89635B071A6351211360B820B1882AB8433B54757B87A373284B1BA182A10326476B36
9A4A6365B58B8018994BB152556765475A704BB94B6B2A39458971A8B90512786B5029404818644323552916170B3ABB
7363496427B088B68725A68570040617949289077B278069A09B559324B8A66828B40549B0296065B2300330592569A7
B76B92BA1293585B6A9B604567A0901362856373B4B56897946256B4172B1B50474351364749A33996A81BA8847347A8
411B850B79A03018291672AA0945656A159AA6AA0A845531A592005B8A34366B882257107B190969A846474836A98007
50778920BA797297A2791101B0685A86BB704B9BAA17B055293679843B35215B0A8B1182B611953B080AA5431B219907
A8448A81B1A9493245676B88013B470335240859594158621014216619553246570601967448B470174B924489244481
7453865A4003B5AA7176451AAB90681A949786154AA040477382BA69371041710B8728458A23979252B254236753A44A
1900AA283536A227648812525743868B410A567794663359A6726A5286783328135114789B7645505B047848020A730A
9557B206776AA56A19682744107901306B29008808619866B4911A05264B872A46B5376383932699531B449195640B62
A63622830886247A47B3957169861239358041AA281333622AA15912B0A636047A489BB0726282A78B96671B27305A96
52496B9B999011A7BA36898891665B1A6009058978850A21B01A158A1473B84A192B8672542A2A7056581995207A436A
5B3BA2824637A3112ABB57176468206A071200A327B3216425148100786502AA21236ABB35499277670A126973058340
3B1922A483856007301983989159BB688A58B602339806B63002A339A50B0BA533B84827793913081070A32595A10180
3A9A20234691B1A0B623274B69B0B44688195169461059543A252BB05208720BA13118266A872B26B9B584959B451795
19534B221A335A2BB6971B3276B3A63A5B791723109B176529BB90651584279B7825712521B8269800738B07A62B1454
7884414451224092937165625696557A78799A82126613535A36B410309B759976119777B895801074B9779B9B513753
8B2799951012273399BB818B721967957713B90947B2A11A6A665848B22B531726616515939323229080B8AB574AA749
4773AB411A57150203067A112944833235A86153803A98689A0762B79835413A46B347888A4AAB259665694B93129B62
1391751430A98B002620718437A7B85B891179479651AA3410663715415B55BA47AA59465AB81567B7655780A8038135
85230122578485B071A529692B19A6537B28616A63556816945380634A90470354AAB303884B7B09B2037B95405BA145
704B19B14AA8028810881AB6072441194A875477836B37704B5199062319A336375437403562A663B835B891957883AB

Hint: Lambert Meertens. Tweak the algorithm you find ;-)

Regards,
Bengt Richter


From steven.bethard at gmail.com  Wed Apr 13 23:04:58 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 21:04:58 -0600
Subject: sort of a beginner question about globals
In-Reply-To: <1113434483.437663.206030@f14g2000cwb.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
Message-ID: <DNmdnVZhutRKQMDfRVn-qg@comcast.com>

fred.dixon wrote:
> #global1.py
> import global2
> import global3
> import sys
> 
> constant = 'dumb'
> option = sys.argv[1:]
> pass
> #global2.func1()
> a=global2.class1()
> a.func1()
> print newvar
> 
> #global2.py
> import __main__
> pass
> class class1:
>     def func1(self):
>         __main__.newvar = "string"
>         pass

The other ways of getting this behavior would be to write global2.py as:
     class class1:
         def func1(self):
             global newvar
             newvar = "string"
or
     class class1:
         def func1(self):
             globals()["newvar"] = "string"
or
     class class1:
         def func1(self):
             __import__(__name__).newvar = "string"
I don't know which of these is really preferred.  Generally if I see 
myself writing code like this, I figure I probably need to refactor things.

STeVe

P.S.  Why are you writing all those 'pass' statements?  They're not 
necessary in any of the locations you've placed them.


From sarir.khamsi at raytheon.com  Fri Apr  8 19:11:41 2005
From: sarir.khamsi at raytheon.com (Sarir Khamsi)
Date: Fri, 08 Apr 2005 16:11:41 -0700
Subject: sending signals to child process
References: <u1x9ldsw2.fsf@raytheon.com> <d36ktu$vgl$05$1@news.t-online.com>
Message-ID: <ud5t450eq.fsf@raytheon.com>

"Diez B. Roggisch" <deetsNOSPAM at web.de> writes:

> Sarir Khamsi wrote:
>
>> I would like to start a child process (like w/ popen3(), or some such)
>> and then be able to interrupt it by sending it a control-c. How do I
>> do that in Python? Is there a better way to gracefully halt a child
>
> Use os.kill and the signal module.
>
>> process? Is there a more cross-platform way to start a child process
>> (popen() is only on UNIX/Win32)? Thanks.
>
> In python2.4 there is the subprocess module.

This is what I was looking for...thanks.

Sarir


From tjreedy at udel.edu  Sun Apr  3 19:09:32 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 3 Apr 2005 19:09:32 -0400
Subject: Help me dig my way out of nested scoping
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
Message-ID: <d2pt00$qad$1@sea.gmane.org>


"Brendan" <spam4bsimons at yahoo.ca> wrote in message 
news:1112562768.181026.180140 at l41g2000cwc.googlegroups.com...
> I have a function, call it F(x), which asks for two
> other functions as arguments, say A(x) and B(x).  ...

If I understand this and the rest, a third party library whose code you 
cannot modify (easily) has a function F with (at least) three parameters: 
A, B, and x.  During its operation, F calls A(x) and B(x).  Because of code 
commonality for the particular A and B arg funcs you want to feed to F, you 
want avoid duplication by having the first call to either to calculate both 
return values.

If F calls each of A and B exactly once and always in the same order and 
only for the value x you supply, the solution is pretty easy.  A calls AB, 
stashes the B value away where it can be retrieved, and return the A value. 
B retrieves the B value and returns it.  But your problem is the stash and 
retrieve part.  Solutions:
1. global variable (easiest)  - use global declaration in A;
2. closure variable - use mutable such as 1 element list (see below);
3. instance attribute - with A and B as methods.

2 is what you tried to do, but without knowing the mutable (list or dict) 
trick:

def ABwrapper():
  bsave = [None]
  def A(x):
    aval,bval = AB(x)
    bsave[0] = bval
    return aval
  def B(x):
    return bsave[0]
  return A,B

This works because A does not try to *rebind* bsave to a new object.  It 
only mutates the existing object.

If the order of calling changes, you need more logic.  If F calls A and B 
on multiple 'x's, as with, for instance, a derivative approximizer, then I 
would memoize A and/or B using the recipe posted here more than once and on 
the cookbook site and included in the new Python Cookbook v2 (and maybe v1, 
don't have it).

Terry J. Reedy





From serpent17 at gmail.com  Sun Apr 17 14:37:48 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 17 Apr 2005 11:37:48 -0700
Subject: Problem with unpack hex to decimal
Message-ID: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>

Hello,

I was looking at this:
http://docs.python.org/lib/module-struct.html
and tried the following

>>> import struct
>>> struct.calcsize('h')
2
>>> struct.calcsize('b')
1
>>> struct.calcsize('bh')
4

I would have expected

>>> struct.calcsize('bh')
3

what am I missing ?

Thanks in advance,

Jake.



From kent37 at tds.net  Thu Apr 21 07:58:14 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 21 Apr 2005 07:58:14 -0400
Subject: Python instances
In-Reply-To: <426776fa.134053138@news.oz.net>
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
	<d450ub$2kp$1@news.web.de>
	<1113983093.813565.23430@l41g2000cwc.googlegroups.com>
	<426647ea$1_3@newspeer2.tds.net> <426776fa.134053138@news.oz.net>
Message-ID: <4267910f$1_3@newspeer2.tds.net>

Bengt Richter wrote:
> The following shows nothing static anywhere, yet a class has been defined, an instance created, and
> __init__ called with initial value, and the value retrieved as an attribute of the returned instance,
> and it's all an expression.
> 
>  >>> type('C', (), {'__init__': lambda self,v:setattr(self,'foo',v)})('hello').foo
>  'hello'

I have no idea what point you are trying to make, except maybe that it is possible to obfuscate a 
simple class definition.

Kenw


From skip at pobox.com  Mon Apr 18 23:03:00 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 18 Apr 2005 22:03:00 -0500
Subject: Wrapping C++ Class Heirachy in Python
In-Reply-To: <roy-607983.22515418042005@reader1.panix.com>
References: <d419gb$r67$1@pump1.york.ac.uk> <d41aau$8o5$03$1@news.t-online.com>
	<umzrvo5zk.fsf@bigfoot.com>
	<roy-607983.22515418042005@reader1.panix.com>
Message-ID: <16996.29924.640079.430476@montanaro.dyndns.org>


    Roy> I've been playing around with ctypes
    Roy> (http://starship.python.net/crew/theller/ctypes/) recently.  So
    Roy> far, it looks pretty cool.

Wrapping C++ libraries?

Skip



From mcassiano at gmail.com  Tue Apr 26 12:06:24 2005
From: mcassiano at gmail.com (Marco Cassiano)
Date: Tue, 26 Apr 2005 18:06:24 +0200
Subject: Shelve problem with Python 2.3.4 on RHEL 3 AS
Message-ID: <72bcfd7505042609061cadeb28@mail.gmail.com>

I installed python 2.3.4 on my system with configure/make/make altinstall in 
order to preserve the original python installation of RHEL3.
I have the following error entering these few python lines : 
Python 2.3.4 (#3, Apr 26 2005, 14:48:36)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-49)] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> import shelve

>>> fl='/tmp/test.shelve'

>>> dbase=shelve.open(fl)

Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/local/lib/python2.3/shelve.py", line 231, in open
return DbfilenameShelf(filename, flag, protocol, writeback, binary)
File "/usr/local/lib/python2.3/shelve.py", line 212, in __init__
Shelf.__init__(self, anydbm.open(filename, flag), protocol, writeback, binar 
y)
File "/usr/local/lib/python2.3/anydbm.py", line 83, in open
return mod.open(file, flag, mode)
File "/usr/local/lib/python2.3/dbhash.py", line 16, in open
return bsddb.hashopen(file, flag, mode)
File "/usr/local/lib/python2.3/bsddb/__init__.py", line 192, in hashopen
d.open(file, db.DB_HASH, flags, mode)
bsddb._db.DBError: (38, 'Function not implemented -- DB_ENV->dbremove: 
method not permitted before open')
 And typing it again I get :

>>> dbase=shelve.open(fl)
Exception exceptions.AttributeError: "DbfilenameShelf instance has no 
attribute 'writeback'" in ignored
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/local/lib/python2.3/shelve.py", line 231, in open
return DbfilenameShelf(filename, flag, protocol, writeback, binary)
File "/usr/local/lib/python2.3/shelve.py", line 212, in __init__
Shelf.__init__(self, anydbm.open(filename, flag), protocol, writeback, 
binary)
File "/usr/local/lib/python2.3/anydbm.py", line 83, in open
return mod.open(file, flag, mode)
File "/usr/local/lib/python2.3/dbhash.py", line 16, in open
return bsddb.hashopen(file, flag, mode)
File "/usr/local/lib/python2.3/bsddb/__init__.py", line 192, in hashopen
d.open(file, db.DB_HASH, flags, mode)
bsddb._db.DBError: (38, 'Function not implemented -- process-private: unable 
to initialize environment lock: Function not implemented')

If I did it with the standard Python 2.2.3 it works perfectly . The problem 
is I need Python 2.3.4 on my system...
Could you give me any advice ?
Thank you

Marco Cassiano


-- 
Marco Cassiano
Italy
email : mcassiano at manord.com
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From mefjr75 at hotmail.com  Mon Apr 18 00:28:18 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 17 Apr 2005 21:28:18 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <mailman.2021.1113737935.1799.python-list@python.org>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
	<4262261c.159801732@news.oz.net>
	<mailman.2021.1113737935.1799.python-list@python.org>
Message-ID: <1113798498.092249.5320@g14g2000cwa.googlegroups.com>

>>PS. Redirecting with > from a script whose interpreter was started by
>>windows extension association
>>doesn't work on some version of windows. To be safe, invoke the
>>interpreter explicitly, e.g.,
>>     python myscript.py [whatever args here] > pi3003.txt

>Thanks very much for this.
>What kind of args could I use here?
Any that your script allows or understands.
an example:
 python c:/Python22/Lib/PySourceColor.py -i- -s -l < c:/MyFile.py >
c:/tmp/myfile.html

A few things that might help you write a well behaved script:
if sys.stdin.isatty():
    "direct"
else:
    "redirected"
This snippet can determine if you have redirected IO.

I just found this and it looks informative.
http://www.jpsdomain.org/windows/redirection.html

hth,
M.E.Farmer



From martin at v.loewis.de  Wed Apr  6 16:33:38 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 06 Apr 2005 22:33:38 +0200
Subject: Erroneous line number error in Py2.4.1 [Windows 2000+SP3]
In-Reply-To: <1112794029.667294.134370@f14g2000cwb.googlegroups.com>
References: <1112794029.667294.134370@f14g2000cwb.googlegroups.com>
Message-ID: <425447A2.2070508@v.loewis.de>

Timo wrote:
> Does anyone have a clue what is going on?

No. Please make a bug report to sf.net/projects/python.

Regards,
Martin


From kent37 at tds.net  Sun Apr 17 11:44:23 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 17 Apr 2005 11:44:23 -0400
Subject: sscanf needed
In-Reply-To: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
References: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
Message-ID: <42628025_3@newspeer2.tds.net>

Uwe Mayer wrote:
> Hi,
> 
> I've got a ISO 8601 formatted date-time string which I need to read into a
> datetime object.

Something like this (adjust the format to suit):
import datetime, time
dt = datetime.datetime(*time.strptime(data, "%Y-%m-%d %H:%M:%S")[:6])

Kent


From eurleif at ecritters.biz  Sat Apr 23 07:59:48 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 23 Apr 2005 11:59:48 GMT
Subject: Python or PHP?
In-Reply-To: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
Message-ID: <UMqae.2015$Cz3.264034@monger.newsread.com>

Lad wrote:
> Is anyone capable of providing Python advantages over PHP if there are
> any?

Python is a programming language in more ways than simple Turing 
completeness. PHP isn't.


From RonGrossi  Tue Apr 19 12:03:02 2005
From: RonGrossi (RonGrossi)
Date: 19 Apr 2005 11:03:02 -0500
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 142)
References: <1113925283.115755.202120@f14g2000cwb.googlegroups.com>
Message-ID: <moaa61t1fn2nf2vvq389djbmtcl6o1lkkc@4ax.com>

!!


From steve at holdenweb.com  Sun Apr 24 19:03:39 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 24 Apr 2005 19:03:39 -0400
Subject: Python or PHP?
In-Reply-To: <3d04e3F6pjhi5U1@individual.net>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org>	<IFEpEp.7Gz@bath.ac.uk>	<mailman.2346.1114273424.1799.python-list@python.org>	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<3d04e3F6pjhi5U1@individual.net>
Message-ID: <d4h8ar$n5n$1@sea.gmane.org>

Leif Biberg Kristensen wrote:
> Leif K-Brooks skrev:
> 
> 
>>But Python's DB-API (the standard way to connect to an SQL database
>>from Python) makes escaping SQL strings automatic. You can do this:
>>
>>cursor.execute('UPDATE foo SET bar=%s WHERE id=%s', ["foo'bar", 123])
> 
> 
> So. I've been writing SQL queries in Python like this, using PostgreSQL
> and psycopg:
> 
> cursor.execute("select * from foo where bar=%s" % baz)
> 
> Is that wrong, and how should I have been supposed to know that this is
> bad syntax? No doc I have seen actually has told me so.

It's *wrong* for some value of "wrong" - it does potentially introduce a 
SQL injection vulnerability into your code.

Suppose I provide as input into the baz variable

     1; drop table foo

Your statement then becomes

select * from foo where bar=1; drop table foo

which is clearly not such a good idea. More sophisticated attackes are 
possible, but this gives you the idea.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bill.mill at gmail.com  Thu Apr 14 11:50:22 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Thu, 14 Apr 2005 11:50:22 -0400
Subject: A little request about spam
In-Reply-To: <e724b24405041407021decd1c4@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<e724b24405041407021decd1c4@mail.gmail.com>
Message-ID: <797fe3d405041408506aab4d13@mail.gmail.com>

On 4/14/05, C?sar Leonardo Blum Silveira <cesarbs at gmail.com> wrote:
> Yeah that is happening to me too! Almost all my python-list e-mails go
> to the Spam box.
> Maybe we should contact the gmail admins?
> 

I've already contacted the gmail admins. There was no response.

Peace
Bill Mill
bill.mill at gmail.com

> On 4/14/05, mark hellewell <mark.hellewell at gmail.com> wrote:
> > On 4/14/05, James <spiralx at gmail.com> wrote:
> > > Yes - it's been like that for the last month or so now and it's quite
> > > annoying, especially seeing as before it was working at near enough
> > > 100% accuracy.
> >
> > And I don't suppose there's much we can do about it?
> >
> > mark
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From bokr at oz.net  Fri Apr 29 21:37:20 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 30 Apr 2005 01:37:20 GMT
Subject: Micro-PEP: str.translate(None) to mean identity translation
Message-ID: <4272e00c.260731842@news.oz.net>

Just thought None as the first argument would be both handy and mnemonic,
signifying no translation, but allowing easy expression of deleting characters,
e.g.,

   s = s.translate(None, 'badcharshere')

Regards,
Bengt Richter


From secun at yahoo.com  Wed Apr 27 22:42:37 2005
From: secun at yahoo.com (ChrisH)
Date: Thu, 28 Apr 2005 02:42:37 GMT
Subject: pyqt and Eric 3
Message-ID: <MPG.1cda1800975d5139989680@news2.atlantic.net>

Are there any Eric 3 users out there?

I've been thinking about trying it.

Also, if I write scripts for internal use only at my company, do I have 
to purchase a Qt or pyqt license?

Thanks for the info!
Chris


From j at b.com  Sun Apr 10 07:57:28 2005
From: j at b.com (Charlie9)
Date: Sun, 10 Apr 2005 11:57:28 GMT
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60_=28new?=
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
	<1113074212.618866.24620@f14g2000cwb.googlegroups.com>
	<2hW5e.31873$hU7.19808@newssvr33.news.prodigy.com>
	<9dd7f022.0504092036.51bd14ca@posting.google.com>
Message-ID: <h35i51t0v06a6hs9ha6c7905ci4p7nf71n@4ax.com>

On 9 Apr 2005 21:36:06 -0700, anthonyjhcnospam at netscape.net (Anthony)
wrote:

>I thought 'The Greatest News Ever' might mean something serious like
>transfer of the classic Beatles albums to SACD.
>But no, it's just religious crap. Now that the Pope's dead, do you
>think we could declare christianity officially extinct? Please?

The Pope is not dead.  The man who filled the position is dead.  There
will be another man.


From ajikoe at gmail.com  Mon Apr 18 08:31:25 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 18 Apr 2005 05:31:25 -0700
Subject: Strings and Lists
In-Reply-To: <d769864e.0504180342.426357d3@posting.google.com>
References: <d769864e.0504180342.426357d3@posting.google.com>
Message-ID: <1113827485.685341.79540@f14g2000cwb.googlegroups.com>

Hello Tom,

I think it is more efficient if we can use list (with True,False)
member to do genetics algorithms. Of course a lot of works to do to
change from string binary into boolean list.

I do programming genetics algorithms in C# I guess I have to modify my
program also because my old program use binary string manipulation.

Sincerely Yours,
Pujo



From franz.steinhaeusler at utanet.at  Tue Apr  5 04:52:42 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Tue, 05 Apr 2005 10:52:42 +0200
Subject: Eric3 under WinXP
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
	<mailman.1366.1112689020.1799.python-list@python.org>
Message-ID: <i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>

On Tue, 5 Apr 2005 09:17:05 +0100 (BST), "Phil Thompson"
<phil at riverbankcomputing.co.uk> wrote:

>> Hello NG,
>>
>> (Win XP)
>>
>> I have successfully installed pyqt, but not
>> qtext, which I need to run Eric3.
>> The PyQT demo files run fine.
>>
>> I've downloaded QScintilla, compiled via MS-VC,
>> but (I suppose I need the SIG), to translate or provide
>> the Python interface with pyd Files.
>>
>> Eric complains, that qtext is not found.
>>
>> Has anyone success with getting this to work and how?
>>
>> Many thanks in advance for possible answers,
>
>You haven't said which version of PyQt you are using. I guess it's the
>non-commercial version based on Qt v2 - QScintilla (and therefore eric)
>requires Qt v3.
>
>Phil


Hello John and Phil,

thank you for your answers.

I have:
PyQt 3.13 Qt v2.3 Non-commercial Edition

I compiled:
qscintilla-1.62-gpl-1.5.1\
and the results seems ok


qmake qscintilla.pro
nmake 

for the qmake, I downloaded:
Qt 3.3.4 Evaluation


I installed also SIP.
sip-4.2.1

What steps are missing?

thank you again

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From bvande at po-box.mcgill.ca  Tue Apr 12 12:33:40 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 12 Apr 2005 12:33:40 -0400
Subject: variables exist
In-Reply-To: <d3g2fb$76m$1@blackmamba.itd.rl.ac.uk>
References: <9622d535.0504110552.1e070e8d@posting.google.com>
	<d3e0jj$93d$1@sea.gmane.org>
	<mailman.1703.1113237192.1799.python-list@python.org>
	<d3g2fb$76m$1@blackmamba.itd.rl.ac.uk>
Message-ID: <425BF864.3060605@po-box.mcgill.ca>

Richard Brodie said unto the world upon 2005-04-12 04:56:
> "Brian van den Broek" <bvande at po-box.mcgill.ca> wrote in message
> news:mailman.1703.1113237192.1799.python-list at python.org...
> 
> 
>>I'm a hobbyist and still learning, but the claim the try/except is
>>"lousy Python" surprise me a bit.
> 
> 
> I think it wasn't the use of try/except as such. It's more that
> if you're the developer you ought to know whether variables
> are defined or not. It might be a sign you're using global
> variables more often than would be considered good style in
> Python.

Richard and STeVe,

thanks for the replies :-)

I see your point, Richard. Though where it has come up for me most 
often is code internal to a class, where I only need a "real" value 
for a class attribute in some cases, depending upon the inputs to the 
class __init__. "Globals are bad" is one lesson I have learned :-)

STeVe stressed that the try/except solution is only really appropriate 
for cases where the failure to have the variable defined is quite 
rare. Even though wary of "the root of all evil ... " that seems a 
good reminder. Thanks.

Best to all,

Brian vdB



From auch-ich-m at g-kein-spam.com  Wed Apr  6 11:08:33 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Wed, 06 Apr 2005 17:08:33 +0200
Subject: regexp weirdness (bug?)
References: <1112715308.737856.234580@z14g2000cwz.googlegroups.com><2584344.b1EHUGjtUV@news.perlig.de><mailman.1395.1112720052.1799.python-list@python.org><1186100.a9ONk7P8cn@news.perlig.de>
	<1112781872.088784.129280@g14g2000cwa.googlegroups.com>
	<mailman.1425.1112788983.1799.python-list@python.org>
Message-ID: <1534368.LanBPdd5dR@news.perlig.de>

* Fredrik Lundh wrote:

> Sergey Schetinin wrote:
> 
>> it's line #159 here, but it did work! thanks. so it IS a bug?
> 
> sure looks like one.  please report it here:
> 
>     http://sourceforge.net/tracker/?group_id=5470&atid=105470

done :)

nd
-- 
"Das Verhalten von Gates hatte mir bewiesen, dass ich auf ihn und seine
beiden Gef?hrten nicht zu z?hlen brauchte" -- Karl May, "Winnetou III"

Im Westen was neues: <http://pub.perlig.de/books.html#apache2>


From duncan.booth at invalid.invalid  Thu Apr 28 08:20:07 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 28 Apr 2005 12:20:07 GMT
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
Message-ID: <Xns964687798F7D0duncanbooth@127.0.0.1>

runes wrote:
> I'm trying to set the title of the console window (CMD.EXE) in Windows.
> I want it set to the basename of the current directory and it should
> stay after the script has finished.
> 
> Any ideas?
> 
I don't think you can do that.

Whenever you start an application from the command prompt the title is 
modified by appending a dash and the name of the program you started. When 
the application terminates the title is reset (to remove the name of the 
running program). So any change to the title will only last until the next 
time CMD.EXE prompts for input. The exception is that any title set using 
the TITLE command becomes the reset title for that command prompt.

I can think of only one way round this, which is to run your python program 
from a batch file and find some way to pass the desired title back to the 
batch file where you can set it with the TITLE command. For example, you 
could write the title to a temporary file, or if your program doesn't 
produce much other output print it to stdout and parse the program output 
using a for command:

e.g. This sets the title to the current time:
 
C:\>FOR /F "tokens=*" %i in (
More? 'python -c "from time import *; print asctime(localtime())"'
More? ) DO @TITLE %i

C:\>

Obvious notes: In a batch file you would double the % characters, and you 
don't type C:\> or More? as these are the prompts from CMD.EXE. Also this 
won't work on really old versions of CMD.EXE or with COMMAND.COM.


From fredrik at pythonware.com  Fri Apr 22 17:04:46 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 23:04:46 +0200
Subject: handling tar, gz and bz2 with python
References: <d4bnr4$89e$1@vegh.ks.cc.utah.edu>
Message-ID: <d4bokk$nk8$1@sea.gmane.org>

Matthew Thorley wrote:

> Is there a module for unpacking tar files in python?

>>> import tarfile
>>> help(tarfile)
    ...
     |  open(cls, name=None, mode='r', fileobj=None, bufsize=10240) from __built
in__.type
     |      Open a tar archive for reading, writing or appending. Return
     |      an appropriate TarFile class.
     |
     |      mode:
     |      'r'          open for reading with transparent compression
     |      'r:'         open for reading exclusively uncompressed
     |      'r:gz'       open for reading with gzip compression
     |      'r:bz2'      open for reading with bzip2 compression
     |      'a' or 'a:'  open for appending
     |      'w' or 'w:'  open for writing without compression
     |      'w:gz'       open for writing with gzip compression
     |      'w:bz2'      open for writing with bzip2 compression
     |      'r|'         open an uncompressed stream of tar blocks for reading
     |      'r|gz'       open a gzip compressed stream of tar blocks
     |      'r|bz2'      open a bzip2 compressed stream of tar blocks
     |      'w|'         open an uncompressed stream for writing
     |      'w|gz'       open a gzip compressed stream for writing
     |      'w|bz2'      open a bzip2 compressed stream for writing
     |
     |  taropen(cls, name, mode='r', fileobj=None) from __builtin__.type
     |      Open uncompressed tar archive name for reading or writing.
    ...

> how about bzip2 and gzips? I know I can use the gzip module for gzips
> but is there anything that can detect what format a file is in and decopress
> and unpack it using the other methods?

see above.

</F>



From jaywgraves at gmail.com  Thu Apr 21 15:54:09 2005
From: jaywgraves at gmail.com (jay graves)
Date: 21 Apr 2005 12:54:09 -0700
Subject: recording data between [ and ]
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<d48fc1$2rm$00$1@news.t-online.com>
	<1114111155.408043.291950@o13g2000cwo.googlegroups.com>
Message-ID: <1114113249.117750.223000@o13g2000cwo.googlegroups.com>

bearophileH... at lycos.com wrote:
> Beside rxb15, there is also redict, in the standard lib (Jay Graves
> shows the HD path):
> http://home.earthlink.net/~jasonrandharper/reverb.py

I knew there was a newer one out there but my google skills failed me.
Thanks for the link.



From radam2 at tampabay.rr.com  Fri Apr  1 15:32:36 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Fri, 01 Apr 2005 20:32:36 GMT
Subject: Pseudocode in the wikipedia
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>
	<d2k70u$70h$1@sea.gmane.org>
	<mailman.1205.1112386538.1799.python-list@python.org>
Message-ID: <n9br41pcarifbu9umt6aligt9g5bdnscb5@4ax.com>

On Fri, 1 Apr 2005 12:15:35 -0800, James Stroud <jstroud at mbi.ucla.edu>
wrote:

>Is anybody else bothered by those stupid pascal-like ":=" assignment 
>operators?
>
>Maybe, for the sake of adding more variety to the world, wiki should come up 
>with a new assignment operator, like "==". I like that one because then it 
>could really be original:
>
>if (bob = 4):
>  bob == bob + 2

To me ":=" could mean to create a copy of an object...  or should it
be "=:" ?

Or how about ":=)" to mean is equal and ":=(" to mean it's not.

Then there is ";=)", to indicate 'True', and ':=O' to indicate 'False'




From tehom at REMOVEpanNOSPAMix.com  Fri Apr  1 19:47:58 2005
From: tehom at REMOVEpanNOSPAMix.com (Tom Breton)
Date: 01 Apr 2005 19:47:58 -0500
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
Message-ID: <m31x9uc8ch.fsf@mail.panix.com>

Daniel Silva <dsilva at ccs.neu.edu> writes:

[...]

> So now FOLD.  This is actually the one we've always hated most,
> because, apart from a few examples involving + or *, almost every time
> we see a FOLD call with a non-trivial function argument, we have to
> grab pen and paper and imagine the *result* of a function flowing back
> in as the *argument* to a function.  Plus, there are *more* arguments
> coming in on the side!  This is all absurdly complicated.  Because
> almost all the examples of FOLD we found in practice could be written
> as a simple loop with an accumulator, this style should be preferred,
> perhaps with us providing a simple helper function to abstract away
> the boilerplate code.  At any rate, FOLD must fold.

Couldn't you leave it in for just another month?  And during the
remaining month, we'll just call it the "APRIL FOLD".

-- 
Tom Breton, the calm-eyed visionary


From saravanand at vsnl.net  Mon Apr 25 09:04:19 2005
From: saravanand at vsnl.net (Saravanan)
Date: 25 Apr 2005 06:04:19 -0700
Subject: Exception in Python 2.3.3 Interpreter
Message-ID: <1114434259.853654.272420@z14g2000cwz.googlegroups.com>

Hello,

Im running Python Application as a Windows Service (using windows
extensions).  But, sporadically the application crashes (crash in
Python23.dll) and this stops the service.  This problem cann't be
reproduced easily in my system and the call stack generated by the
application is given below.


Occurrence: 2005/4/22  23:24:57
Process Id:  3072
Process Name : D:\Python23\lib\site-packages\win32\PythonService.exe
Thread Id:  292
Exception code: C0000005 ACCESS_VIOLATION
Fault address:  1E05C202 01:0005B202 C:\WINDOWS\system32\python23.dll

Registers:
EAX:1E0E2EAC
EBX:00732EA8
ECX:1E03E500
EDX:016EC200
ESI:00000000
EDI:00732EA8
CS:EIP:001B:1E05C202
SS:ESP:0023:025FFA3C  EBP:00637470
DS:0023  ES:0023  FS:003B  GS:0000
Flags:00010246

Call stack:
Address   Frame
1E05C202  00637470  0001:0005B202 C:\WINDOWS\system32\python23.dll
016EC29C  00000003  0000:00000000

The thread which throws the exception is from the Python-Core and not
from the application logic.

The above call stack points to PyObject_Compare function in object.c.

Any clue about the problem?  

Thanks in Advance.

Saravanan D



From jaywgraves at gmail.com  Thu Apr 14 17:23:59 2005
From: jaywgraves at gmail.com (jay graves)
Date: 14 Apr 2005 14:23:59 -0700
Subject: changing colors in python
References: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>
Message-ID: <1113513839.557906.32890@l41g2000cwc.googlegroups.com>

AFAIK, the cmd.exe program on Win2K/XP doesn't support ANSI escape
sequences.  There are various other options on windows but they
probably won't work on Linux.

http://newcenturycomputers.net/projects/wconio.html
http://effbot.org/zone/console-handbook.htm



From tim at tt1lock.org  Sun Apr 10 03:34:02 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Sun, 10 Apr 2005 07:34:02 GMT
Subject: Are circular dependencies possible in Python?
References: <IEosBE.GtB@bath.ac.uk> <pan.2005.04.09.23.51.14.597138@gmx.net>
Message-ID: <IEpzoq.71x@bath.ac.uk>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote or quoted:
> In <IEosBE.GtB at bath.ac.uk>, Tim Tyler wrote:

> > Like C, Python seems to insist I declare functions before calling
> > them - rather than, say, scanning to the end of the current script
> > when it can't immediately find what function I'm referring to.
> 
> They don't have to be declared but to be *defined* in Python before you
> can call them. [...]

That makes three of you who have called me on my use of "declare".

AFAICT, I was using the standard dictionary definition of this word:

  http://dictionary.reference.com/search?q=declare

The term "declare" doesn't have the same meaning as the term "predeclare".
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From ptmcg at austin.rr.com  Tue Apr 26 06:02:07 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 26 Apr 2005 03:02:07 -0700
Subject: Quote-aware string splitting
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
Message-ID: <1114507799.131989.307760@f14g2000cwb.googlegroups.com>

Quoted strings are surprisingly stateful, so that using a parser isn't
totally out of line.  Here is a pyparsing example with some added test
cases.  Pyparsing's quotedString built-in handles single or double
quotes (if you don't want to be this permissive, there are also
sglQuotedString and dblQuotedString to choose from), plus escaped quote
characters.

The snippet below includes two samples.  The first 3 lines give the
equivalent to other suggestions on this thread.  It is followed by a
slightly enhanced version that strips quotation marks from any quoted
entries.

-- Paul
(get pyparsing at http://pyparsing.sourceforge.net)
==========
from pyparsing import *
test = r'''spam 'it don\'t mean a thing' "the life of brian"
           42 'the meaning of "life"' grail'''
print OneOrMore( quotedString | Word(printables) ).parseString( test )

# strip quotes during parsing
def stripQuotes(s,l,toks):
    return toks[0][1:-1]
quotedString.setParseAction( stripQuotes )
print OneOrMore( quotedString | Word(printables) ).parseString( test )
==========

returns:
['spam', "'it don\\'t mean a thing'", '"the life of brian"', '42',
'\'the meaning of "life"\'', 'grail']
['spam', "it don\\'t mean a thing", 'the life of brian', '42', 'the
meaning of "life"', 'grail']



From daniel.dittmar at sap.corp  Fri Apr  1 08:30:24 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Fri, 01 Apr 2005 15:30:24 +0200
Subject: Case-insensitive dict, non-destructive, fast, anyone?
In-Reply-To: <du7ll82mza9.fsf@lehtori.cc.tut.fi>
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <d2j9nf$h0g$1@news.sap-ag.de>
	<du7ll82mza9.fsf@lehtori.cc.tut.fi>
Message-ID: <d2jif7$npk$1@news.sap-ag.de>

Ville Vainio wrote:
>>>>>>"Daniel" == Daniel Dittmar <daniel.dittmar at sap.corp> writes:
> 
> 
>     Daniel> Ville Vainio wrote:
> 
>     >> I need a dict (well, it would be optimal anyway) class that
>     >> stores the keys as strings without coercing the case to upper
>     >> or lower, but still provides fast lookup (i.e. uses hash
>     >> table).
> 
>     Daniel> Store the original key together with the value and use a
>     Daniel> lowercase key for lookup.
> 
> That's what I thought initially, but the strings take most of the
> space in dict and I didn't feel like doubling the size.

You could write a string wrapper that changes comparison and hashing. 
I'm not sure that this (+ 1 (Python object + instance dictionary)) would 
use less memory than the other proposal (+ 1 Tuple + 1 String).

Daniel



From pitonero at gmail.com  Wed Apr  6 12:28:26 2005
From: pitonero at gmail.com (El Pitonero)
Date: 6 Apr 2005 09:28:26 -0700
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<4252fec3@nntp0.pdx.net>
	<1112754535.800594.127430@g14g2000cwa.googlegroups.com>
	<42538190.432027552@news.oz.net>
Message-ID: <1112804906.026086.247650@z14g2000cwz.googlegroups.com>

Bengt Richter wrote:
> On 5 Apr 2005 19:28:55 -0700, "El Pitonero" <pitonero at gmail.com>
wrote:
>
> >Scott David Daniels wrote:
> >> Ron_Adam wrote:
> >> > ...
> >>
> >>      def tweakdoc(name):
> >>          def decorator(function):
> >> 	    function.__doc__ = 'Tweak(%s) %r' % (name, function.__doc__)
> >> 	    return function
> >>          return decorator
> >>
> >> What is confusing us about what you write is that you are
referring
> >to
> >> tweakdoc as a decorator, when it is a function returning a
decorator.
> >
> >"Decorator factory" would be a shorter name for "a function
returning a
> >decorator".
> >
> True, but tweakdoc doesn't have to be a function, so IMO we need a
better
> name for the @-line, unless you want to use many various specific
names
> like factory. E.g.,

There are two things:

(1) The "tweadoc" object in the example, which no doubt can be called a
decorator factory.

(2) The @-line, which you called a "decorator expression" and that's
fine with me. My preference would be something like the "decorator
header". A more clear statement would be something like: a "decorator
header expression" or the "expression in the decorator header", though
your proposed "decorator expression" would be clear enough, too.

I was addressing (1). You jumped in with (2), which I was aware of and
was not dissenting.



From steve at holdenweb.com  Fri Apr  1 18:54:57 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 01 Apr 2005 18:54:57 -0500
Subject: Grouping code by indentation - feature or ******?
In-Reply-To: <qXB2e.264074$r4.16023840@news-reader.eresmas.com>
References: <IDwEr6.K2u@bath.ac.uk>	<qH91e.259681$r4.15769879@news-reader.eresmas.com>	<pan.2005.03.27.07.00.34.307937@uiuc.edu>	<ktA1e.260110$r4.15818805@news-reader.eresmas.com>	<1112162883.943233.37980@o13g2000cwo.googlegroups.com>
	<qXB2e.264074$r4.16023840@news-reader.eresmas.com>
Message-ID: <d2kmth$hqt$1@sea.gmane.org>

Javier Bezos wrote:
> "Myles Strous" <myles at .com> escribi? en el mensaje
> news:1112162883.943233.37980 at o13g2000cwo.googlegroups.com...
> 
>>>>satisfy some handy properties, the first of which being:
>>>>  l[:n] + l[n:] = l
>>>
>>>I don't think l[:5] + l[5:] = l is a handy property
>>>and to me is clearly counterintuitive. Further,
>>
>>It can be quite useful for inserting something into a list (or string),
>>after finding the position where you wish to insert it.
>>improvedList = l[:n] + [new stuff] + l[n:]
> 
> 
> As I answered in another post this is not more
> useful than writing l[:n-1]. Of course, I'm aware
> of the case where n=0, but this would require only
> a bit of extra code (and, after all, I'm just saying
> that half-open ranges are not a panacea and that I
> don't like their side effects).
> 
> 
>>I vaguely remember hearing at one stage that the
>>sequence[position:position+length] notation is also potentially useful
>>for indexing into large strings or buffers.
> 
> 
> Right, to some extent it's useful, but at the cost
> of introducing tricky syntaxes for very specific
> cases, like this one, and unexpected off-by-one
> errors in other cases, which is my point. For
> example, recently I had to get a value from a
> list preceded by the two previous values:
> lst[n-2:n+1] and not the more logical (at last
> to my eyes) lst[n-2:n].
> 
> Instead of giving further examples I would like
> to cite three cases:
> 
> 1) You have a starting point (s) and a
>    length (t): lst[s:s+t].
> 2) You have an ending point (e) and a
>    length: lst[e-t+1:e+1].
> 3) You have a starting point and an ending
>    point: lst[s:e+1].
> 
> What's odd is that Python applies the syntax of
> case 3 to the logic of case 1. While something
> like lst[s:s+t-1] for the first case could be
> explained in simple mathematical terms (in other
> words, it's an integral part of the algorithms),
> I cannot find a way to explain the e+1 in cases
> 2 and 3 (and the inconsistency with e-t+1 in case
> 2 vs. s+t in case 1) except the Python syntax.
> 

While this may be an interesting philosophical (or should that be 
philological) discussion, since Python has worked this way for donkey's 
years, and since a change would break 30% of the existing codebase, you 
clearly can't be advocating change.

So, what's the point of this thread now?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From mefjr75 at hotmail.com  Sun Apr 17 05:33:49 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 17 Apr 2005 02:33:49 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
	<1113713669.255207.39580@f14g2000cwb.googlegroups.com>
	<1113726606.945042.71820@z14g2000cwz.googlegroups.com>
Message-ID: <1113730429.336626.81360@g14g2000cwa.googlegroups.com>

MrJean1 wrote:
> There is an issue with both my and your code: it only works if doc
> strings are triple quoted and if there are no other triple quoted
> strings in the Python code.
I had not considered single quoted strings ;)
> A triple quoted string used in an assignment will be removed, for
> example this case
>
>   s  =  '''this string should not be removed'''
>
>
> It is still unclear how to distinguish doc strings from other
strings.
> Also, I have not checked the precise Python syntax, but doc strings
do
> not need to be enclosed by triple quotes.  A single quote may be
> allowed too.
>
> Maybe this rule will work: a doc string is any string preceded by a
> COLON token followed by zero, one or more INDENT or NEWLINE tokens.
> Untested!
Not needed , if you reread my post I explain that I had solved that
issue.
If you use the line argument that tokenizer supplies we can strip
whitespace and 'rRuU' from the start of the line and look for a single
quote or a double quote .
I have tested it and it works.
Reworked the 'pep8' thing and fixed the bug you mentioned here is the
changes.

>
######################################################################
> > # Python source stripper
> >
>
######################################################################
> >
> > import os
> > import sys
> > import token
> > import keyword
> > import StringIO
> > import tokenize
> > import traceback
> > __credits__ = '''
> > J?rgen Hermann
> > M.E.Farmer
> > Jean Brouwers
> > '''
> > __version__ = '.8'
> > __author__ = 'M.E.Farmer'
> > __date__ =  'Apr 16, 2005,' \
> >             'Jan 15 2005,' \
> >             'Oct 24 2004' \
> >
> >
> >
>
######################################################################
> >
> > class Stripper:
> >     """Python source stripper
> >     """
> >     def __init__(self, raw):
> >         self.raw = raw
> >
> >     def format(self, out=sys.stdout, comments=0, docstrings=0,
> >                 spaces=1, untabify=1, eol='unix'):
> >         """ strip comments,
> >             strip docstrings,
> >             strip extra whitespace and lines,
> >             convert tabs to spaces,
> >             convert EOL's in Python code.
> >         """
> >         # Store line offsets in self.lines
> >         self.lines = [0, 0]
> >         pos = 0
> >         # Strips the first blank line if 1
> >         self.lasttoken = 1
> >         self.temp = StringIO.StringIO()
> >         self.spaces = spaces
> >         self.comments = comments
> >         self.docstrings = docstrings
> >
> >         if untabify:
> >            self.raw = self.raw.expandtabs()
> >         self.raw = self.raw.rstrip()+' '
> >         self.out = out
> >
> >         # Have you ever had a multiple line ending script?
> >         # They can be nasty so lets get them all the same.
> >         self.raw = self.raw.replace('\r\n', '\n')
> >         self.raw = self.raw.replace('\r', '\n')
> >         self.lineend = '\n'
> >
> >         # Gather lines
> >         while 1:
> >             pos = self.raw.find(self.lineend, pos) + 1
> >             if not pos: break
> >             self.lines.append(pos)
> >
> >         self.lines.append(len(self.raw))
> >         self.pos = 0
> >
> >         # Wrap text in a filelike object
> >         text = StringIO.StringIO(self.raw)
> >
> >         # Parse the source.
> >         ## Tokenize calls the __call__
> >         ## method for each token till done.
> >         try:
> >             tokenize.tokenize(text.readline, self)
> >         except tokenize.TokenError, ex:
> >             traceback.print_exc()
> >
> >         # Ok now we write it to a file
> >         # but we also need to clean the whitespace
> >         # between the lines and at the ends.
> >         self.temp.seek(0)
> >
> >         # All this should be written into the
> >         # __call__ method just haven't yet...
> >
> >         # Mac CR
> >         if eol == 'mac':
> >            self.lineend = '\r'
> >         # Windows CR LF
> >         elif eol == 'win':
> >            self.lineend = '\r\n'
> >         # Unix LF
> >         else:
> >            self.lineend = '\n'
> >
> >         for line in self.temp.readlines():
> >             if spaces == -1:
> >                 self.out.write(line.rstrip()+self.lineend)
> >             else:
> >                 if not line.isspace():
> >                     self.lasttoken=0
> >                     self.out.write(line.rstrip()+self.lineend)
> >                 else:
> >                     self.lasttoken+=1
> >                     if self.lasttoken<=self.spaces and self.spaces:
> >                         self.out.write(self.lineend)
> >
> >     def __call__(self, toktype, toktext,
> >                  (srow,scol), (erow,ecol), line):
> >         """ Token handler.
> >         """
> >         # calculate new positions
> >         oldpos = self.pos
> >         newpos = self.lines[srow] + scol
> >         self.pos = newpos + len(toktext)
> >
> >        # kill comments
> >        if self.comments:
> >            if toktype == tokenize.COMMENT:
> >                return
> >
        # kill doc strings
        if self.docstrings:
            # Assume if there is nothing on the
            # left side it must be a docstring
            if toktype == tokenize.STRING and \
                line.lstrip(' rRuU')[0] in ["'",'"']:
                t = toktext.lstrip('rRuU')
                # pep8 frowns on triple single quotes
                if ( self.docstrings == 'pep8' or
                     self.docstrings == 8):
                    # pep8 frowns on single triples
                    if not t.startswith('"""'):
                        return
                else:
                    return

        # handle newlines
        if toktype in [token.NEWLINE, tokenize.NL]:
            self.temp.write(self.lineend)
            return

        # send the original whitespace
        if newpos > oldpos:
            self.temp.write(self.raw[oldpos:newpos])

        # skip indenting tokens
        if toktype in [token.INDENT, token.DEDENT]:
            self.pos = newpos
            return

       # send text to the temp file
        self.temp.write(toktext)
        return
######################################################################

def Main():
    import sys
    if sys.argv[1]:
        filein = open(sys.argv[1]).read()
        Stripper(filein).format(out=sys.stdout,
                 comments=0, docstrings='pep8', untabify=1, eol='win')
######################################################################

if __name__ == '__main__':
    Main()


That should work like a charm for all types of docstrings without
disturbing others strings.

M.E.Farmer



From WLigtenberg at gmail.com  Wed Apr 20 06:08:36 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Wed, 20 Apr 2005 12:08:36 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
Message-ID: <pan.2005.04.20.10.08.25.97524@gmail.com>

On Sun, 17 Apr 2005 02:16:04 +0000, William Park wrote:

> Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
>> I want to parse a very large (2.4 gig) XML file (bioinformatics
>> ofcourse :)) But I have no clue how to do that. Most things I see read
>> the entire xml file at once. That isn't going to work here ofcourse.
>> 
>> So I would like to parse a XML file one record at a time and then be
>> able to store the information in another object.  How should I do
>> that?
>> 
>> Thanks in advance,
>> 
>> Willem Ligtenberg A total newbie to python by the way.
> 
> You may want to try Expat (www.libexpat.org) or Python wrapper to it.
> You can feed small piece at a time, say by lines or whatever.  Of
> course, it all depends on what kind of parsing you have in mind. :-)
> 
> Care to post more details?

The XML file I need to parse contains information about genes.
So the first element is a gene and then there are a lot sub-elements with
sub-elements. I only need some of the informtion and want to store it in
my an object called gene. Lateron this information will be printed into a
file, which in it's turn will be fed into some other program.
This is an example of the XML
<?xml version="1.0"?>
<!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN" "NCBI_Entrezgene.dtd">
<Entrezgene-Set>
  <Entrezgene>
    <Entrezgene_track-info>
      <Gene-track>
        <Gene-track_geneid>9996</Gene-track_geneid>
        <Gene-track_status value="secondary">1</Gene-track_status>
        <Gene-track_current-id>
          <Dbtag>
            <Dbtag_db>LocusID</Dbtag_db>
            <Dbtag_tag>
              <Object-id>
                <Object-id_id>320632</Object-id_id>
              </Object-id>
            </Dbtag_tag>
          </Dbtag>
          <Dbtag>
            <Dbtag_db>GeneID</Dbtag_db>
            <Dbtag_tag>
              <Object-id>
                <Object-id_id>320632</Object-id_id>
              </Object-id>
            </Dbtag_tag>
          </Dbtag>
        </Gene-track_current-id>
        <Gene-track_create-date>
          <Date>
            <Date_std>
              <Date-std>
                <Date-std_year>2003</Date-std_year>
                <Date-std_month>8</Date-std_month>
                <Date-std_day>28</Date-std_day>
                <Date-std_hour>21</Date-std_hour>
                <Date-std_minute>39</Date-std_minute>
                <Date-std_second>0</Date-std_second>
              </Date-std>
            </Date_std>
          </Date>
        </Gene-track_create-date>
        <Gene-track_update-date>
          <Date>
            <Date_std>
              <Date-std>
                <Date-std_year>2005</Date-std_year>
                <Date-std_month>2</Date-std_month>
                <Date-std_day>17</Date-std_day>
                <Date-std_hour>12</Date-std_hour>
                <Date-std_minute>54</Date-std_minute>
                <Date-std_second>0</Date-std_second>
              </Date-std>
            </Date_std>
          </Date>
        </Gene-track_update-date>
      </Gene-track>
    </Entrezgene_track-info>
    <Entrezgene_type value="protein-coding">6</Entrezgene_type>
    <Entrezgene_source>
      <BioSource>
        <BioSource_genome value="genomic">1</BioSource_genome>
        <BioSource_origin value="natural">1</BioSource_origin>
        <BioSource_org>
          <Org-ref>
            <Org-ref_taxname>Mus musculus</Org-ref_taxname>
            <Org-ref_common>house mouse</Org-ref_common>
            <Org-ref_db>
              <Dbtag>
                <Dbtag_db>taxon</Dbtag_db>
                <Dbtag_tag>
                  <Object-id>
                    <Object-id_id>10090</Object-id_id>
                  </Object-id>
                </Dbtag_tag>
              </Dbtag>
            </Org-ref_db>
            <Org-ref_syn>
              <Org-ref_syn_E>mouse</Org-ref_syn_E>
            </Org-ref_syn>
            <Org-ref_orgname>
              <OrgName>
                <OrgName_name>
                  <OrgName_name_binomial>
                    <BinomialOrgName>
                      <BinomialOrgName_genus>Mus</BinomialOrgName_genus>
                      <BinomialOrgName_species>musculus</BinomialOrgName_species>
                    </BinomialOrgName>
                  </OrgName_name_binomial>
                </OrgName_name>
                <OrgName_lineage>Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Sciurognathi; Muridae; Murinae; Mus</OrgName_lineage>
                <OrgName_gcode>1</OrgName_gcode>
                <OrgName_mgcode>2</OrgName_mgcode>
                <OrgName_div>ROD</OrgName_div>
              </OrgName>
            </Org-ref_orgname>
          </Org-ref>
        </BioSource_org>
      </BioSource>
    </Entrezgene_source>
    <Entrezgene_gene>
      <Gene-ref>
      </Gene-ref>
    </Entrezgene_gene>
    <Entrezgene_gene-source>
      <Gene-source>
        <Gene-source_src>LocusLink</Gene-source_src>
        <Gene-source_src-int>9996</Gene-source_src-int>
        <Gene-source_src-str2>9996</Gene-source_src-str2>
        <Gene-source_gene-display value="false"/>
        <Gene-source_locus-display value="false"/>
        <Gene-source_extra-terms value="false"/>
      </Gene-source>
    </Entrezgene_gene-source>
    <Entrezgene_locus>
      <Gene-commentary>
        <Gene-commentary_type value="genomic">1</Gene-commentary_type>
        <Gene-commentary_version>0</Gene-commentary_version>
      </Gene-commentary>
    </Entrezgene_locus>
    <Entrezgene_unique-keys>
      <Dbtag>
        <Dbtag_db>LocusID</Dbtag_db>
        <Dbtag_tag>
          <Object-id>
            <Object-id_id>9996</Object-id_id>
          </Object-id>
        </Dbtag_tag>
      </Dbtag>
    </Entrezgene_unique-keys>
    <Entrezgene_xtra-index-terms>
      <Entrezgene_xtra-index-terms_E>LOC320632</Entrezgene_xtra-index-terms_E>
    </Entrezgene_xtra-index-terms>
  </Entrezgene>
</Entrezgene-Set>



From roy at panix.com  Fri Apr  1 18:53:14 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 01 Apr 2005 18:53:14 -0500
Subject: Ternary Operator in Python
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<mailman.1198.1112380413.1799.python-list@python.org>
	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
Message-ID: <roy-C95782.18531401042005@reader1.panix.com>

In article <1112391650.018826.274970 at l41g2000cwc.googlegroups.com>,
 "Carl Banks" <invalidemail at aerojockey.com> wrote:

> Terry Reedy wrote:
> > "praba kar" <prabapython at yahoo.co.in> wrote in message
> > news:20050401072442.73412.qmail at web8408.mail.in.yahoo.com...
> > > Dear All,
> > >    I am new to Python.  I want to know how to
> > > work with ternary operator in Python.  I cannot
> > > find any ternary operator in Python.  So Kindly
> > > clear my doubt regarding this
> >
> > A unary operator has one operand; a binary operator has two operands;
> a
> > ternary operator has three operands.  Python has none built-in,
> 
> Not so fast, my friend.  What about the expression "0.0 < a < 1.0"?

I still remember one of the earliest bugs I ever wrote (I've long since 
forgotten most of the zillions I've written since).  It must have been 
around 1975, and my high school had an ASR-33 connected to a HP-3000 
running Time Shared Basic at another school a few towns away.

I wrote something like "1 < X < 10" and got an error.  I was puzzled by 
this, since we were using this notation in math class.  The answer of 
course was that I needed to write "1 < X AND X < 10", which I found really 
annoying and strange looking.  Or is my long-term memory returning 
corrupted data?  Maybe BASIC let you do 1 < X < 10, but I ran into this 
when I moved onto FORTRAN the next year?

In any case, I've gotten so used to writing 1 < x && x < 10 (or variations 
on the theme) that now I've got a language which lets me write it the 
normal math way, 1 < x < 10, and *that* looks strange.  Wierd, huh?  How 
our tools warp our thinking.


From michele.simionato at gmail.com  Sun Apr 10 00:35:58 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Apr 2005 21:35:58 -0700
Subject: Puzzling OO design problem
In-Reply-To: <20050409142843.26D9.0.NOFFLE@dthierbach.news.arcor.de>
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<20050409082128.A3E.0.NOFFLE@dthierbach.news.arcor.de>
	<20050409142843.26D9.0.NOFFLE@dthierbach.news.arcor.de>
Message-ID: <1113107758.450304.65000@o13g2000cwo.googlegroups.com>

Dirk wrote:
> So I dug through the documentation and found that new-style classes
> compute a monotonic linearization of the inheritance graph, observing
>local precedence order, using the algorithm also used in Dylan
> described here:

>http://www.webcom.com/haahr/dylan/linearization-oopsla96.html

<nitpick mode>
Actually Dylan authors invented the C3 algorithm but Dylan does not use
it:
for compatibility with Lisp, Dylan uses the CLOS algorithm. Languages
that
I know that use C3 are Python and Goo. Playing with the MOP you can get
lispy languages to follow C3 too.
</nitpick mode>



From polykrombelcentercom  Sat Apr 30 14:58:54 2005
From: polykrombelcentercom (Zoool (at dot))
Date: Sat, 30 Apr 2005 20:58:54 +0200
Subject: User Directory Path
References: <IKGdnQt3ufCXWe7fRVnyuQ@scarlet.biz>
	<1114885796.215916.99730@f14g2000cwb.googlegroups.com>
Message-ID: <yNOdneuncIjySO7fRVnyuQ@scarlet.biz>

Thanks a lot,

os.environ["HOMEDRIVE"]
os.environ["HOMEPATH"]

are what i was looking for ....




"wittempj at hotmail.com" <martin.witte at gmail.com> a ?crit dans le message de 
news: 1114885796.215916.99730 at f14g2000cwb.googlegroups.com...
> os.getenv or os.envoron, see http://docs.python.org/lib/os-procinfo.html
> 




From michele.simionato at gmail.com  Wed Apr  6 08:37:19 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 6 Apr 2005 05:37:19 -0700
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
	Flaw
In-Reply-To: <mDP4e.21483$d5.157888@newsb.telia.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<du7zmwcgzh5.fsf@mozart.cc.tut.fi>
	<mDP4e.21483$d5.157888@newsb.telia.net>
Message-ID: <1112791039.362368.58110@l41g2000cwc.googlegroups.com>

Sunnan:

> The python code I've read so far has looked like that. Not > type
declarations, but loooong class declarations.

What do you mean? Lots of repetitive
"self.variable=variable" in the __init__ method? Use of classes when
you would use closures? Or maybe you
are comparing with CLOS classes, which are pretty
slim, since the (multi)methods are defined outside
them?

              Michele Simionato



From eurleif at ecritters.biz  Fri Apr 15 20:56:00 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 16 Apr 2005 00:56:00 GMT
Subject: pre-PEP: Simple Thunks
In-Reply-To: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
Message-ID: <AoZ7e.1103$Cz3.120328@monger.newsread.com>

Brian Sabbey wrote:
> Thunk statements contain a new keyword, 'do', as in the example below. 
> The body of the thunk is the suite in the 'do' statement; it gets passed 
> to the function appearing next to 'do'. The thunk gets inserted as the 
> first argument to the function, reminiscent of the way 'self' is 
> inserted as the first argument to methods.

It would probably make more sense to pass the thunk as the last 
argument, not as the first. That would make it easier to create 
functions with optional thunks, as in:

def print_nums(start, end, thunk=None):
     for num in xrange(start, end+1):
         if thunk is not None:
             num = thunk(num)
         print num

print_nums(1, 3) # prints 1, 2, 3

do num print_nums(1, 3): # prints 2, 4, 6
     continue num * 2

> Because thunks blend into their environment, a thunk cannot be used 
> after its surrounding 'do' statement has finished

Why? Ordinary functions don't have that restriction:

 >>> def foo():
...     x = 1
...     def bar():
...         return x
...     return bar
...
 >>> foo()()
1


From tim.peters at gmail.com  Mon Apr 18 23:18:36 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Mon, 18 Apr 2005 23:18:36 -0400
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
Message-ID: <1f7befae0504182018211ef530@mail.gmail.com>

[Steve]
> I have a suggestion/request that will, I think, improve the Python
> documentation.
>
> Currently, the Python documentation in HTML format is stored at URLs
> that change with each new release of Python.  That is, for example, the
> documentation for the os module is at
> http://python.org/doc/2.3/lib/module-os.html for release 2.3 of Python,
> at http://python.org/doc/2.4/lib/module-os.html for release 2.4 and so
> on.

Have you tried <http://docs.python.org>?
 
> I propose that an additional a URL be set up for the Python HTML
> documentation.  This URL will always contain the current version of the
> documentation.  Suppose we call it "current".  Then (while 2.4 is still
> the current version)  the documentation for the os module would also be
> available at
> http://python.org/doc/current/lib/module-os.html.

Try

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

> There are three advantages to this proposal.
>
> (1) It is cheap and easy to do.
>
> (2) If a person regularly refers to the documentation for the os
> module, he can bookmark
> http://python.org/doc/current/lib/module-os.html and always be sure of
> getting the most current version.
>
> (3) This would give Pythonistas -- basically as a freebie --
> annotatable documentation.  You may be familiar with Wikalong (
> http://www.wikalong.org/ ).  Wikalong basically allows you to annotate
> any URL.  If we had a "current" URL for Python documentation, people
> could add Wikalong notes to the current documentation without worrying
> that the annotations would not survive the release of the next version
> of Python.  Being able to use Wikalong would provide the Python
> community with the opportunity to experiment with annotatable documents
> (not to mention,  ride the leading edge of the Wikalong wave).  And
> those who dislike annotated documentation can easily ignore it or turn
> it off the Wikalong sidebar (assuming that they have Wikalong installed
> in the first place).

Con:  It's already there, and TOOWTDI <wink>.


From james at wrong.nu  Mon Apr 25 09:57:24 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Mon, 25 Apr 2005 14:57:24 +0100
Subject: Multiple tuples for one for statement
In-Reply-To: <426CF1D5.E9F4396@pauahtun.org>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
	<200504251356.07715.james@wrong.nu> <426CF1D5.E9F4396@pauahtun.org>
Message-ID: <200504251457.28724.james@wrong.nu>

On Monday 25 April 2005 14:34, Ivan Van Laningham wrote:
> Hi All--
>
> "R. C. James Harlow" wrote:
> > or just:
> >
> > for a,b,c in (tup1, tup2, tup3):
> >     print a
> >     print b
> >     print c
>
> And this works in Python version???

Ah, reading the replies to the original post, this works but doesn't give the 
result that the original poster wanted.
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From bokr at oz.net  Mon Apr 11 23:42:06 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 12 Apr 2005 03:42:06 GMT
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
Message-ID: <425b1421.146537619@news.oz.net>

On Mon, 11 Apr 2005 17:26:09 +0200, Uwe Mayer <merkosh at hadiko.de> wrote:

>Hi,
>
>I've been looking into ways of creating singleton objects. With Python2.3 I
>usually used a module-level variable and a factory function to implement
>singleton objects.
>
>With Python2.4 I was looking into decorators. The examples from PEP 318
>http://www.python.org/peps/pep-0318.html#examples
>
>don't work - AFAIK because:
>- you cannot decorate class definitions (why was it left out?)
>- __init__ must return None
>
>
>However, you can use the decorator:
>
>def singleton(f):
>    instances = {}
>    def new_f(*args, **kwargs):
>        if (f not in instances):
>            instances[f] = f(*args, **kwargs)
>        return instances[f]
>    new_f.func_name = f.func_name
>    new_f.func_doc = f.func_doc       
>    return new_f
>
>with a class that overwrites the __new__ methof of new-style classes:
>
>class Foobar(object):
>    def __init__(self):
>        print self
>
>    @singleton
>    def __new__(self):
>        return object.__new__(Foobar)
>
>
>Is this particularly ugly or bad?
>
>Thanks for comments,

I thought of a different approach. The singleton function here
takes arguments for the initial instance of a class, and instantiates it,
and then modifies the class's __new__ and __init__ to return the initial
instance and prevent further initialization.

Used directly, as normal function decorators can be (i.e., fun = deco(fun)
or fun = deco(args)(fun)), singleton works (not counting bugs ;-) as is.

To invoke it as decorator demands a trick workaround using an intermediate
workaround decorator and a dummy funcion definition synonymous with the
class to be decorated (which mus pre-exist for this).

BTW, this is different from the class-decorator-as-sugar-for-metaclass,
(which I suggested previously) since it take one class argument vs arguments
for the metaclass __new__ etc.


I added a singularize decorator for when you don't immediately want to
specify the first initiazization parameters, but want the first instance
to to become the singleton instance whenever that happens later.

So here's some hacks to play with:

----< singleton.py >-----------------------------------------------
def singleton(*args, **kw):
    """decorator cacheing singleton instance immediately"""
    def singdeco(cls):
        assert isinstance(cls, type)
        inst = cls(*args, **kw)
        cls.__new__ = staticmethod(lambda *a, **kw: inst)
        cls.__init__ = staticmethod(lambda *a, **kw: None) # no re-init
        return cls
    return singdeco

import sys
def workaround(f):
    cls = sys._getframe(1).f_locals.get(f.func_name)
    if cls is None:
        cls = sys._getframe(1).f_globals.get(f.func_name)
    return cls

def singularize(cls):
    """decorator setting singleton-making mousetrap"""
    oldnew = cls.__new__
    def __new__(cls, *args, **kw):
        inst = oldnew(cls)
        inst.__init__(*args, **kw)
        cls.__new__ = staticmethod(lambda *a,**kw: inst)
        cls.__init__ = staticmethod(lambda *a, **kw: None)
        return inst
    cls.__new__ = staticmethod(__new__)
    return cls

def test():
    class Foobar(object): pass
    Foobar = singleton()(Foobar)
    print Foobar
    print [Foobar() for x in xrange(2)]

    class Boobar(object):
        def __init__(self, v):
            print self, v
            self.v = v
    @singleton(123)
    @workaround
    def Boobar(): pass  # dummy used by workaround for name
    
    print Boobar
    print [Boobar(x) for x in xrange(2)]
    print [Boobar(x).v for x in xrange(2)]
    
    class Gee(object):
        def __init__(self): print 'Gee:', self

    Gee = singularize(Gee)
    print Gee
    print [Gee() for x in xrange(2)]

    class Haw(object):
        def __init__(self, *args, **kw):
            self.args = args
            self.kw =kw

    Haw = singularize(Haw)
    haw = Haw(1,2L, 3.5, s='string', more='example')
    print vars(haw)
    print vars(Haw(111, a='222'))
    print [Haw(), Haw()]
    print [Haw().args[i] for i in xrange(len(Haw().args))]
    print [Haw().kw['s'], Haw().kw['more']]

    
if __name__ == '__main__':
    test()
-------------------------------------------------------------------
No guarantees, mind ;-)

Output, showing single instances and no repeat initialization:

<class '__main__.Foobar'>
[<__main__.Foobar object at 0x02F03BEC>, <__main__.Foobar object at 0x02F03BEC>]
<__main__.Boobar object at 0x02F03DCC> 123
<class '__main__.Boobar'>
[<__main__.Boobar object at 0x02F03DCC>, <__main__.Boobar object at 0x02F03DCC>]
[123, 123]
<class '__main__.Gee'>
Gee: <__main__.Gee object at 0x02F03E8C>
[<__main__.Gee object at 0x02F03E8C>, <__main__.Gee object at 0x02F03E8C>]
{'args': (1, 2L, 3.5), 'kw': {'s': 'string', 'more': 'example'}}
{'args': (1, 2L, 3.5), 'kw': {'s': 'string', 'more': 'example'}}
[<__main__.Haw object at 0x02F03F0C>, <__main__.Haw object at 0x02F03F0C>]
[1, 2L, 3.5]
['string', 'example']

Regards,
Bengt Richter


From exarkun at divmod.com  Mon Apr 25 14:16:00 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Mon, 25 Apr 2005 18:16:00 GMT
Subject: What is situation with threads in Python
In-Reply-To: <797fe3d4050425111074475da6@mail.gmail.com>
Message-ID: <20050425181600.10340.1919634272.divmod.quotient.24928@ohm>

On Mon, 25 Apr 2005 14:10:28 -0400, Bill Mill <bill.mill at gmail.com> wrote:
>On 4/25/05, Leonard J. Reder <reder at jpl.nasa.gov> wrote:
>> Hello Mark,
>>
>> I took your three day course here at JPL and recall that you said
>> something was wrong with the implementation of threads within Python
>> but I cannot recall what.  So what is wrong with threads in Python?
>
>I'm going to guess that he meant the Global Interpreter Lock is what's
>wrong with Python threads. You can read about it in the docs at
>http://docs.python.org/api/threads.html and get some good analysis
>from Ian Bicking (with some excellent, and some not so excellent,
>comments): http://blog.ianbicking.org/gil-of-doom.html .
>
>>
>> The other part of this question is, if there is something wrong with
>> the threads in Python has anyone wrapped the Posix threads C api using
>> swig to fix this problem?  I work on Solaris/Linux systems and this
>> seems like a quick fix - maybe.
>>
>
>Nope, since the interpreter is not entirely thread-safe, I don't
>believe you can wrap pthreads.

  Python _does_ wrap pthreads, where it is appropriate to do so.  Whether another threading library is present, it wraps that instead.  Whatever happens, it presents the result in the form of the thread module.

  Jp


From mfranklin1 at gatwick.westerngeco.slb.com  Fri Apr 22 05:58:17 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Fri, 22 Apr 2005 10:58:17 +0100
Subject: How to prevent Tkinter frame resize?
In-Reply-To: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
References: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
Message-ID: <d4ahj5$cne$1@sea.gmane.org>

phil_nospam_schmidt at yahoo.com wrote:
> I am trying to prevent a user from resizing a frame beyond its
> "natural" size as given by winfo_reqwidth and winfo_reqheight, without
> any success. Can anyone make any suggestions, based on my code below?
> 
> Thanks!
> 
> from Tkinter import *
> 
> class Table(Frame):
>     def __init__(self, master,
>                  rows=['row 1'], cols=['col 1'],
>                  row_labels=True,
>                  col_labels=True,
>                  row_buttons=True,
>                  col_buttons=True):
> 	Frame.__init__(self, master)
> 	self.rows = rows
> 	self.cols = cols
>         self.row_labels = row_labels
>         self.col_labels = col_labels
>         self.row_buttons = row_buttons
>         self.col_buttons = col_buttons
>         self.col_width = 6
>         self.draw()
>         self.bind('<Configure>', self.changed)
>     def changed(self, ev):
>         w, h = self.winfo_reqwidth(), self.winfo_reqheight()
>         cfg = {}
>         if ev.height > h:
>             cfg['height'] = h
>         if ev.width > w:
>             cfg['width'] = w
>         if cfg:
>             self.config(**cfg)   ######## this has no effect ########

I'm not sure I follow your code but this method is bound to the
<Configure> event *but* needs to return the string "break" so that it
does not pass that event on to the default event handler.



      def changed(self, ev):
          w, h = self.winfo_reqwidth(), self.winfo_reqheight()
          cfg = {}
          if ev.height > h:
              cfg['height'] = h
          if ev.width > w:
              cfg['width'] = w
          if cfg:
              self.config(**cfg)   ######## this has no effect ########
          return "break"

This may do what you want.....

Cheers
Martin



From http  Wed Apr 13 15:39:32 2005
From: http (Paul Rubin)
Date: 13 Apr 2005 12:39:32 -0700
Subject: Simple Python + Tk text editor
References: <425D6641.5050906@pytex.org>
Message-ID: <7xfyxuqxe3.fsf@ruckus.brouhaha.com>

Jonathan Fine <jfine at pytex.org> writes:
> I'm looking for a simple Python + Tk text editor.
> 
> I want it as a building block/starting point.

Something wrong with IDLE?


From aahz at pythoncraft.com  Tue Apr  5 18:43:51 2005
From: aahz at pythoncraft.com (Aahz)
Date: 5 Apr 2005 18:43:51 -0400
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <d2v4b7$pb4$1@panix1.panix.com>

In article <1112725379.514651.66540 at l41g2000cwc.googlegroups.com>,
ChinStrap <caneff at gmail.com> wrote:
>
>When not using the interactive prompt, what are you using? I keep
>hearing everyone say Emacs, but I can't understand it at all. I keep
>trying to learn and understand why so many seem to like it because I
>can't understand customization even without going through a hundred
>menus that might contain the thing I am looking for (or I could go
>learn another language just to customize!).

Use vim.  80% of the power of emacs at 20% of the learning curve.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From glauco.silva at cenpra.gov.br  Wed Apr 27 07:48:00 2005
From: glauco.silva at cenpra.gov.br (Glauco Silva)
Date: Wed, 27 Apr 2005 08:48:00 -0300
Subject: How can i solve this problem with py2exe ?
Message-ID: <00a001c54b1e$f6628140$e87290c8@piau>

Hi,
I?m with problem to create a executable program in python. 
I?m using py2exe but i don?t know if it?s right.
When i run in prompt "python setup.py py2exe", appear in the end this:

###########
The following modules appear to be missing
[ '_imaging_gif','libVTKCommonPython', 'libVTKContribPython', 'libVTKGraphicsPython', 'libVTKImagingPython', 'libVTKPatentedPython', libvtkCommonPython', 'libvtkFilteringPython', 'libvtkGraphicsPython', 'libvtkHybridPython', 'libvtkIOPython', 'libvtkImagingPython', 'libvtkParallelPython', 'libvtkPatentedPython', 'libvtkRenderingPython', 'numarray.array', 'numarray.dot', 'numarray.fromfile', 'numarray.size', 'numarray.zeros', 'vtk.vtkActor2D', 'vtk.vtkDCMParser', 'vtk.vtkImageClip', 'vtk.vtkImageFlip', 'vtk.vtkImageImport', 'vtk.vtkImageMagnify', 'vtk.vtkImageMapper', 'vtk.vtkImagePermute', 'vtk.vtkImageReader', 'vtk.vtkImageResample', 'vtk.vtkImageReslice', 'vtk.vtkImageShiftScale', 'vtk.vtkImageThreshold', 'vtk.vtkImageViewer', 'vtk.vtkImageWriter', 'vtk.vtkRenderWindow', 'vtk.vtkRenderer', 'vtk.vtkTextMapper', 'vtk.vtkTextProperty', 'vtk.vtkTransform']
###########

How can i solve this problem?


My setup.py:

from distutils.core import setup
import py2exe
from glob import glob

setup(
    # The first three parameters are not required, if at least a
    # 'version' is given, then a versioninfo resource is built from
    # them and added to the executables.
    version = "2.0",
    description = "programa InVesalius",
    name = "InVesalius",

    # targets to build
    console = ["C:\\promed2.0\\python\\MyMainModule.py"],
    data_files=[("icons", glob("C:\\promed2.0\\icons\\*.*")),
                ("docs",glob("C:\\promed2.0\\docs\\*.*")),
                ("config", ["C:\\promed2.0\\setup.cfg"])
                ],    
    packages = ['vtk-windows', 'vtk-windows.vtk',
                'vtk-windows.vtk.gtk', 'vtk-windows.vtk.qt',
                'vtk-windows.vtk.tk', 'vtk-windows.vtk.util',
                'vtk-windows.vtk.wx', 'vtk-windows.vtk.test'],  
    )

My PYTHONPATH = C:\Python23;C:\promed2.0\vtk-windows;C:\promed2.0\python

My dir:
##########
promed2.0/
              setup.cfg
               setup.py
               icons/
  
               docs/
 
               python/
                           MyMainModule.py
                 
               vtk-window/
                            vtkpython.py
                            vtkpythontk.py

                            vtk.pth
                            vtkCommon.dll
                            vtkCommonPython.dll
                            vtkCommonTCL.dll
                                           ...

                            vtk/ 
###########

OS: win 2K
Python ver: 2.3.5
py2exe ver: 0.5.4

Thanks
Glauco
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From vze4rx4y at verizon.net  Mon Apr 18 20:38:59 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Tue, 19 Apr 2005 00:38:59 GMT
Subject: Removing dictionary-keys not in a set?
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
	<slrnd67r9l.fc3.klaus@main.szn.dk>
Message-ID: <DqY8e.7741$4v3.3313@trndny03>

[Klaus Alexander Seistrup]
> >>> d1 = {1:'a', 2:'b', 3:'c', 4:'d', 5:'e'}
> >>> s1 = set(d1)
> >>> s1
> set([1, 2, 3, 4, 5])
> >>> s2 = set([1, 3, 5])
> >>> s1-s2
> set([2, 4])
> >>> for k in s1-s2:
> ...     del d1[k]
> ...

FWIW, if s2 is not already a set object, it need not be transformed before using
it.  Instead, write:

for k in set(d1).difference([1,3,5]):
    del d1[k]

If you prefer to work with dictionaries instead of sets, then adapt the existing
code for symmetric_difference_update() in sets.py.



Raymond Hettinger




From leo at lspace.org  Thu Apr  7 15:23:21 2005
From: leo at lspace.org (Leo Breebaart)
Date: 7 Apr 2005 19:23:21 GMT
Subject: How to name Exceptions that aren't Errors
Message-ID: <3blfl8F6gt80jU1@individual.net>

I've recently become rather fond of using Exceptions in Python to
signal special conditions that aren't errors, but which I feel
are better communicated up the call stack via the exception
mechanism than via e.g. return values.

For instance, I'm thinking of methods such as:


    def run(self):
    """ Feed the input file to the simulator. """

        for linenr, line in enumerate(self.infile):
            try:
                current_values = self.parse_line(linenr, line)
==>         except CommentLineException:
                continue
            results = self.do_one_simulation_step(current_values)
            self.process_simulation_results(results)


which I use in order to discard comments from a file I'm parsing
line-by-line.

My question is twofold. First, I know that many programmers are
violently opposed to using exceptions in this fashion, i.e. for
anything other than, well, exceptional circumstances. But am I
correct in thinking that in Python this usage is actually
considered quite normal, and not frowned upon? Is my snippet
above indeed sufficiently Pythonic?

Second, purely as a question of aesthetics, I was wondering if
the folks here might have any opinions about actual naming
conventions for the exception classes used in this fashion.

'CommentLineError' would clearly be wrong, but using the
'Exception' prefix seems a bit redundant and pointless too. I
suppose I could just call the exception "CommentLine" and leave
it at that, but I don't know, maybe there's something better I'm
overlooking.

Any suggestions?

-- 
Leo Breebaart  <leo at lspace.org>


From steven.bethard at gmail.com  Wed Apr 27 16:47:23 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 27 Apr 2005 14:47:23 -0600
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <1114634355.348110.141690@o13g2000cwo.googlegroups.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
Message-ID: <EYednbmZKbHHZ_LfRVn-gA@comcast.com>

Lonnie Princehouse wrote:
> Might as well make a class for Book instead of dealing with buckets of
> lists...
> 
> class Book(object):
>     def __init__(self, title, author, publisher, isbn, date):    # add
> more fields according to CSV
>         self.__dict__.update(locals())  # lazy!

Just for any newbies not paying attention, a slightly less lazy approach 
that doesn't leave the Book instance referencing itself would do 
something like:

     params = locals()
     del params['self']
     self.__dict__.update(params)

or just write it out:

     self.title = title
     self.author = author
     self.publisher = publisher
     self.isbn = isbn
     self.date = date

=)

STeVe


From rbt at athop1.ath.vt.edu  Mon Apr 25 13:23:07 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 25 Apr 2005 13:23:07 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <xImdnW33JJiov_DfRVn-iw@powergate.ca>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
	<uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
	<xImdnW33JJiov_DfRVn-iw@powergate.ca>
Message-ID: <d4j91s$bfp$1@solaris.cc.vt.edu>

Peter Hansen wrote:
> Peter Hansen wrote:
> 
>> Dennis Lee Bieber wrote:
>>
>>> On Mon, 25 Apr 2005 17:24:36 +0300, Christos "TZOTZIOY" Georgiou:
>>>
>>>> I don't know any related myth of anglo-saxon origin to quote.
> 
> 
>>>     The most commonly known phrasing would likely be "God only helps
>>> those who help themselves".
>>
>>
>> Google suggests that removing the word "only" produces a
>> phrase many times more commonly known...
> 
> 
> And very interesting reading (to spawn another diversion
> typical to c.l.p)

OK, I'm seeking to provoke now... why don't you go hijack some other 
thread?

OK, I'm done seeking to provoke. So, it's official. Perl has *much*, 
*much* better support for dealing with PDF files than does Python. 
Hopefully that'll change one day soon. If I had the programming 
knowledge, I'd get on it right away, but alas I do not so I cannot ;)

Thanks to all who responded on topic.


From fperez.net at gmail.com  Tue Apr 12 12:09:06 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Tue, 12 Apr 2005 10:09:06 -0600
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net> <du71x9ho29x.fsf@mozart.cc.tut.fi>
	<3c1qrjF6k3k4fU1@individual.net>
Message-ID: <d3grl9$p2k$1@sea.gmane.org>

Claudio Grondi wrote:

> Considering what I found in the ipython mailing archives
> and the fact, that after the fix with displaying colors on
> bright backgrounds Gary had no time yet to get in touch
> with me about the code I have sent him, I suppose, that
> there will be no new releases addressing this problem
> soon, right?

Sorry to hear this; unfortunately readline/win32 is beyond my control, so there
is not much I can offer on this front.  You could try to write to Gary again,
he might just have been swamped with other things at the time.

Best,

f



From stewart.midwinter at gmail.com  Tue Apr 26 21:32:56 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 26 Apr 2005 18:32:56 -0700
Subject: App suggestion please: blog / forum software in Python
In-Reply-To: <w2Abe.1320$Ne7.864@newssvr17.news.prodigy.com>
References: <mailman.2547.1114553904.1799.python-list@python.org>
	<w2Abe.1320$Ne7.864@newssvr17.news.prodigy.com>
Message-ID: <1114565576.866943.77420@g14g2000cwa.googlegroups.com>

thanks Kartic.  I use Frog already at my office.  For this particular
application, its design may not be appropriate, since each user gets
her own blog space.  I'm actually after a community blog, where any one
of the registered users can post an item, or discuss on a forum.

Drupal, from http://drupal.org, seems to do exactly what I want, except
it's written in php.

Thanks for the tip on Vellum. I'd like to find a few sites using it, so
I can see it in action. 

S



From bjgol at yahoo.com  Thu Apr 14 23:15:59 2005
From: bjgol at yahoo.com (Brett)
Date: Thu, 14 Apr 2005 22:15:59 -0500
Subject: Rookie Question: Passing a nested list into a function?
References: <oIWdnebQUt6Tg8LfRVn-sw@comcast.com>
	<mailman.1945.1113532023.1799.python-list@python.org>
Message-ID: <Yq-dnVvvw8NjrMLfRVn-rA@comcast.com>

I think so.  I later reference it as textfilelist[0][0].  My intent is to be 
able to use: titlelist1[x][1] as part of my "if" statement in my function.

-Brett



"James Stroud" <jstroud at mbi.ucla.edu> wrote in message 
news:mailman.1945.1113532023.1799.python-list at python.org...
>
> Do you really want quotation marks around "titlelist1[x][1]" ?
>
> e.g.
>
>>>> textfilelist = [["titlelist1[x][1]"]]
>>>> textfilelist[0][1]
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> IndexError: list index out of range
>
>
>
> On Thursday 14 April 2005 06:51 pm, Brett wrote:
>> I am trying to pass the value of a nested list into a function (to my 
>> "if"
>> statement) as follows:
>>
>> textfilelist = [["titlelist1[x][1]"]]
>> def idfer(listlength, comparelistlength, list):
>>         while x < (listlength - 1):
>>                        while y < comparelistlength:
>>                             if list == titlelist2[y][1]:
>> (I cutoff the end to focus on the problem)
>>
>> #Here i call my function hoping i am passing the value within
>> textfilelist[0][0] to my function
>> idfer(textfilelist[0][1], textfilelist[1][1], textfilelist[0][0])
>>
>>
>> --------------
>> I don't if there is a "legal" way to do this, but I would appreciate some
>> guidance.
>>
>> Thanks,
>>
>> Brett
>
> -- 
> James Stroud, Ph.D.
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/ 




From bulliver at badcomputer.org  Fri Apr 29 22:40:24 2005
From: bulliver at badcomputer.org (darren kirby)
Date: Fri, 29 Apr 2005 19:40:24 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <4272C8A0.7050404@hathawaymix.org>
References: <d4u60o$akh$1@news2.netvision.net.il>
	<4272C8A0.7050404@hathawaymix.org>
Message-ID: <200504291940.29908.bulliver@badcomputer.org>

quoth the Shane Hathaway:
> pythonchallenge wrote:
> > For the riddles' lovers among you, you are most invited to take part
> > in the Python Challenge, the first python programming riddle on the net.
> >
> > You are invited to take part in it at:
> > http://www.pythonchallenge.com
>
> That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
> "temporary end".
>
> Shane
>
> P.S. I hope I didn't hammer your server on step 3.  I was missing the
> mark. :-)

You're not the only one. This is where I am currently stuck. It's starting to 
hurt my head.

There are 478 results in the form *BBBsBBB* but the thing said 'exactly' 
right, well there are 10 results in the form *sBBBsBBBs*
None of them seem to work...

I quit ;)
-- 
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972
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From steve at holdenweb.com  Tue Apr  5 19:35:13 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 19:35:13 -0400
Subject: Best editor?
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <d2v778$4h5$1@sea.gmane.org>

ChinStrap wrote:
> When not using the interactive prompt, what are you using? I keep
> hearing everyone say Emacs, but I can't understand it at all. I keep
> trying to learn and understand why so many seem to like it because I
> can't understand customization even without going through a hundred
> menus that might contain the thing I am looking for (or I could go
> learn another language just to customize!).
> 
> Personally I like SciTE, it has everything I think a midweight editor
> should: code folding, proper python support, nice colors out of the
> box, hotkey access to compile (I'm sure emacs does this, but I couldn't
> figure out for the life of me how), etc.
> 
> Opinions on what the best is? Or reading I could get to maybe sway me
> to Emacs (which has the major advantage of being on everyone's system).
> 
There is only a "best" editor if you aare convinced that only oine 
measure is important, allowing you to place all editors on a single 
straight line and declare the one that appears furthest to the left or 
right the "best".

In practice, of course, different people value different editor 
characteristics, so there are a multitude of opinions about which is "best".

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From lucio.torre at gmail.com  Fri Apr 15 19:40:05 2005
From: lucio.torre at gmail.com (lucio.torre at gmail.com)
Date: 15 Apr 2005 16:40:05 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
Message-ID: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>

Hello,

Some months ago i did a port of the Python2.3.2 interpreter to PalmOS.
I didnt port any C module or created modules for PalmOS API's. But you
can run an interpreter and use stdin/stdout from a form.

There is also a tool to freeze scripts and use the interpreter as a
pseudo-shared library.

While talking with Facundo while in a PyAr meeting (python-argentina,
http://www.python.org/ar ) he told me that there is some interest in
this platform.

So, ive made an initial release that has no documentation on how to use
it or compile it (it requires codewarrior). If there is any interest on
this, please let me know so we can work on getting this as a real port.

As usual, this is just a proof of concept and is ugly in many ways.
(ie, in Palm, code segments must be less than 64K, so some files had to
be split and rearranged  ).

If anyone want to check this out, heres the url:
http://pyar.decode.com.ar/Members/ltorre/PythonPalm

Regards,

Lucio.



From cappy2112 at gmail.com  Thu Apr  7 18:13:04 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 7 Apr 2005 15:13:04 -0700
Subject: how can I extract all urls in a string by using re.findall() ?
In-Reply-To: <mailman.1464.1112844596.1799.python-list@python.org>
References: <311b5ce105040619052e00e10c@mail.gmail.com>
	<mailman.1464.1112844596.1799.python-list@python.org>
Message-ID: <1112911984.035191.238350@f14g2000cwb.googlegroups.com>

>>Reading the documentation on re might be helpfull here :-P
Many times, the python docs can make the problem more complicated,
espcecially with regexes.



From steven.bethard at gmail.com  Sun Apr  3 18:09:42 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 03 Apr 2005 16:09:42 -0600
Subject: StopIteration in the if clause of a generator expression
In-Reply-To: <_2R3e.3341$7b.3033@trndny06>
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com> <_2R3e.3341$7b.3033@trndny06>
Message-ID: <uqednS7IkJQ69M3fRVn-qQ@comcast.com>

Raymond Hettinger wrote:
> [Peter Otten]
> 
>>Do you see any chance that list comprehensions will be redefined as an
>>alternative spelling for list(<generator expression>)?
> 
> Not likely.  It is possible that the latter spelling would make it possible for
> Py3.0. eliminate list comps entirely.  However, they are very popular and
> practical, so my bet is that they will live on.

I suspect you're right, but I certainly wouldn't complain if list comps 
disappeared. TOOWTDI and all, and I often find myself alternating 
between the two when I can't decide which one seems more Pythonic. 
(These days I generally write a listcomp, but I wouldn't put any money 
on my code being entirely consistent about this...)

STeVe


From simoninusa2001 at yahoo.co.uk  Sat Apr 23 12:43:52 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 23 Apr 2005 09:43:52 -0700
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
Message-ID: <1114274632.128667.281820@l41g2000cwc.googlegroups.com>

I've been a PHP and Perl programmer (amongst others) for 10 years or
more now, and a Python coder for 3 or so.

I have come to hate PHP now, it's pseudo-OOP is awful, it's dog slow at
handling XML, it's so easy to use that most of the programmers I've had
contact with are very sloppy and do things like extract($_GET); or put
database usernames and passwords in index.php. I also have to agree
that php.net/manual seems to be the main reference that coders use -
which is not good if the comments are wrong!

Python seems to force you to write better code, maybe because of the
indentation, exception handling, proper OOP etc. Plus it's not so tied
into web stuff, in fact most of my Python programming is for the
desktop.

I still love Perl, it's a bit of an art form, as "there's more than one
way to do it", whereas Python usually only allows one way to do it,
which may or may not be a better mantra....

I've come to allocate PHP the same standing as ASP, VB or Java - the
language is OK, but the programmers are usually crap.



From kingofearth.com at gmail.com  Thu Apr 14 16:10:26 2005
From: kingofearth.com at gmail.com (kingofearth.com at gmail.com)
Date: 14 Apr 2005 13:10:26 -0700
Subject: Socket Error
In-Reply-To: <d3mduk$k9b$03$1@news.t-online.com>
References: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
	<d3mduk$k9b$03$1@news.t-online.com>
Message-ID: <1113509426.452739.166010@z14g2000cwz.googlegroups.com>

Thanks everybody, it works now. I thought I needed to do something like
that but it didn't show it in the tutorial so I decided to ask here.



From t-meyer at ihug.co.nz  Tue Apr 12 20:23:32 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 13 Apr 2005 12:23:32 +1200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E80297B49D@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB007E@its-xchg4.massey.ac.nz>

> installs it where?  the MS docs seem to indicate that they 
> want you to install it in the program directory, rather than 
> in a "shared" location:
> 
>     http://support.microsoft.com/default.aspx?scid=kb;en-us;326922

From
<http://mail.python.org/pipermail/python-list/2005-February/265334.html>:

"""This means to install it into the directory containing python.exe.
Unfortunately, this does not work if your extension is then used in
an embedded Python, e.g. one running as a COM object. In this case,
python.exe will not be the main executable, but, say, outlook.exe will
be. So Microsoft's recommendation to install the DLL into the EXE
directory is flawed for COM and other embedded cases. This is
precisely the reason why the Python installer installs both python24.dll
and msvcr71.dll into system32."""

=Tony.Meyer



From richardblackwood at cloudthunder.com  Sun Apr 24 00:14:16 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 00:14:16 -0400
Subject: Variables
In-Reply-To: <1114315847.532982.178620@z14g2000cwz.googlegroups.com>
References: <426B0283.40602@cloudthunder.com><d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<ZMydnQbLxdM9jfbfRVn-hg@comcast.com>	<mailman.2369.1114313380.1799.python-list@python.org>
	<1114315847.532982.178620@z14g2000cwz.googlegroups.com>
Message-ID: <426B1D18.4030504@cloudthunder.com>

Dan Bishop wrote:

>Richard Blackwood wrote:
>  
>
>>Steven Bethard wrote:
>>
>>    
>>
>>>Richard Blackwood wrote:
>>>
>>>      
>>>
>>>>Indeed, this language is math. My friend says that foo is a
>>>>        
>>>>
>constant
>  
>
>>>>and necessarily not a variable. If I had written foo =
>>>>        
>>>>
>raw_input(),
>  
>
>>>>he would say that foo is a variable.
>>>>        
>>>>
>>>Then what does he say if you write:
>>>
>>>foo = 5
>>>foo = 6
>>>      
>>>
>...
>  
>
>>He says that foo is a constant. At first it was a constant which
>>    
>>
>equaled
>  
>
>>5, then it was a constant that equaled 6.
>>    
>>
>
>He must have a very unusual definition of "constant".
>
>  
>
I believe he argues that foo existed as two separate constants. He also 
says that if I write:

foo = 6
foo = raw_input()

then foo first exists as a constant and then as a variable (because it 
can then be anything, any value that the user inputs).


From pgmoscatt at optushome.com.au  Fri Apr 15 03:53:49 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Fri, 15 Apr 2005 17:53:49 +1000
Subject: Tk Listbox - Selected Item ?
References: <pan.2005.04.14.12.05.18.839662@optushome.com.au>
	<mailman.1892.1113484982.1799.python-list@python.org>
Message-ID: <425f722b$0$5849$9a6e19ea@news.newshosting.com>

Martin Franklin wrote:

> Peter Moscatt wrote:
>> I am having trouble understanding the methods for the Listbox from Tk.
>> 
>> If I was to select at item in the list using a mouse click (have already
>> created the bind event) - what method returns the text of the selected
>> item ?
>> 
>> Pete
>> 
> 
> 
> Pete,
> 
> pydoc Tkinter.Listbox
> 
> <snip>
> 
>   |  curselection(self)
>   |      Return list of indices of currently selected item.
>   |
>   |  delete(self, first, last=None)
>   |      Delete items from FIRST to LAST (not included).
>   |
>   |  get(self, first, last=None)
>   |      Get list of items from FIRST to LAST (not included).
> 
> So to get the value of the selected item:
> 
> lb.get(lb.curselection()[0])
> 
> 
> provided the listbox is in single selection mode or only one item is
> selected
> 
> Martin

Thanks Martin,

I used the:
  lb.get(lb.curselection()[0])

ant this works to a point.  When I select the item in the listbox the system
generates an error:

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "/home/linux/programming/dxcluster/servers.py", line 37, in sel
    items = self.listbox.get(self.listbox.curselection()[0])
IndexError: tuple index out of range


Then if I select a second time directly after the error message I get my
desired result.

Am I to you the code you quoted in your original message:

>   |  curselection(self)
>   |      Return list of indices of currently selected item.
>   |
>   |  delete(self, first, last=None)
>   |      Delete items from FIRST to LAST (not included).
>   |
>   |  get(self, first, last=None)
>   |      Get list of items from FIRST to LAST (not included).



Pete





From jepler at unpythonic.net  Mon Apr 18 20:07:34 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 18 Apr 2005 19:07:34 -0500
Subject: New Python regex Doc (was: Python documentation moronicities)
In-Reply-To: <1113856843.023012.165500@l41g2000cwc.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1113856843.023012.165500@l41g2000cwc.googlegroups.com>
Message-ID: <20050419000731.GA10263@unpythonic.net>

On Mon, Apr 18, 2005 at 01:40:43PM -0700, Xah Lee wrote:
> i have rewrote the Python's re module documentation.
> See it here for table of content page:
> http://xahlee.org/perl-python/python_re-write/lib/module-re.html

For those who have long ago consigned Mr. Lee to a killfile, it looks
like he's making an honest attempt to improve Python's documentation
here.

Mr Lee, I hope you will submit your documentation changes to python's
patch tracker on sourceforge.net.  I don't fully agree with some of what
you've written (e.g., you give top billing to the use of functions like
re.search while I would encourage use of the search method on compiled
RE objetcts, and I like examples to be given as though from interactive
sessions, complete with ">>>" and "..."), but nits can always be picked
and I'm not the gatekeeper to Python's documentation.

Jeff
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From bokr at oz.net  Thu Apr 28 13:25:28 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 28 Apr 2005 17:25:28 GMT
Subject: creating very small types
References: <mailman.2599.1114633031.1799.python-list@python.org>	<pan.2005.04.27.21.46.20.199466@jerf.org>
	<427012B4.7090604@gmail.com>
	<mailman.2605.1114642557.1799.python-list@python.org>
	<42704f31.92576087@news.oz.net>
Message-ID: <4270fbd4.136771827@news.oz.net>

On Thu, 28 Apr 2005 05:07:34 GMT, bokr at oz.net (Bengt Richter) wrote:

... some not quite correct code ;-/
(I copy/pasted and created an illusion. My code dict has no EOS, so
I decode pad zero bits as code that a single zero stands for ('a' in this case)
so that was an oversight. I should have extended the coding some more or reserved
perhaps 'F' as EOString, and tested for EOS in the decode stream.

>
This is revised, sorry.
You can make a 'way more efficient decoder as an exercise ;-)
Hint: if you make a dict of all the 2**width integers as keys where
width is your widest code (4 here for 2**4), then you can do a single
mask of 2**width-1 and look up the translation to (char, codewidth) directly,
according to the codewidth least significant bits, if you make all the states
of the other bits into keys that map to the same (char,codewidth).
So for example all the even values of out 2**16 would have to map to ('a', 1)
and all the values with 2 LSBs of 01 (of which there are 4) would map to ('b',2)
and so forth. Thus the incrementing of width and trying one thing after
another is not necessary. I think that will work ...

Well, now Andrea has something to do ;-)
>----< trivcodec.py >------------------------------------------------
#trivcodec.py
EOS = ''
import itertools
def encode(stream):
    outchar = count = 0
    for char in itertools.chain(stream, [EOS]):
        bits, width = codes[char]
        outchar |= (bits<<count)
        count += width
        while count >= 8:
            yield chr(outchar&0xff)
            outchar >>= 8
            count -= 8
    if count:
        yield chr(outchar)

def decode(stream):
    codebuf = count = 0
    width = 1; char = None
    for codebyte in stream:
        codebyte = ord(codebyte)
        codebuf |= (codebyte<<count)
        count += 8
        if width>count:
            continue
        while width <= count:
            code = (codebuf&((1<<width)-1), width)
            if code not in chars:
                width += 1
                continue
            char = chars[code]
            if char == EOS: break
            yield char
            codebuf >>= width
            count -= width
            width = 1
        if char == EOS: break
        width = 1 

#trivial encoding dict: a=0 b=01 C=0011 D=0111 E=1011 EOS=1111
codes = {'a':(0x00,1), 'b':(0x01, 2), 
         'C':(0x3+0x4*0,4), 'D':(0x3+0x4*1,4),
         'E':(0x3+0x4*2,4), EOS:(0x3+0x4*3,4)}
chars = dict([(v,k) for k,v in codes.items()]) # reverse

def test(*tests):
    if not tests: tests = ['abaDECbaabbD']
    for charstream in tests:
        print
        codestream = ''.join(list(encode(charstream)))
        print '%r [%s] -(encode)-> %r [%s]' % (
            charstream, len(charstream), codestream, len(codestream))
        recovered = ''.join(list(decode(codestream)))
        print '%r [%s] -(decode)-> %r [%s]' % (
            codestream, len(codestream), recovered, len(recovered))
     
if __name__ == '__main__':
    import sys
    test(*sys.argv[1:])
>--------------------------------------------------------------------
>
>Result:
Not really. Tack enough a's on the recovered chars to account for zero fill
of the last encoded byte ;-/
>
>[22:02] C:\pywk\clp>py24 trivcodec.py
>
>'abaFECbaabbDF' [13] -(encode)-> '\xf2;Q\xf7' [4]
>'\xf2;Q\xf7' [4] -(decode)-> 'abaFECbaabbDF' [13]

Fine, because the [4] bytes were totally filled.
>
>[22:02] C:\pywk\clp>py24 trivcodec.py  a b C D E F
>
>'a' [1] -(encode)-> '\x00' [1]
>'\x00' [1] -(decode)-> 'a' [1]
Not so fine. There is no character serving as EOS mark.
>
>'b' [1] -(encode)-> '\x01' [1]
>'\x01' [1] -(decode)-> 'b' [1]
>
>'C' [1] -(encode)-> '\x03' [1]
>'\x03' [1] -(decode)-> 'C' [1]
>
>'D' [1] -(encode)-> '\x07' [1]
>'\x07' [1] -(decode)-> 'D' [1]
>
>'E' [1] -(encode)-> '\x0b' [1]
>'\x0b' [1] -(decode)-> 'E' [1]
>
>'F' [1] -(encode)-> '\x0f' [1]
>'\x0f' [1] -(decode)-> 'F' [1]

That really produced:

[ 8:03] C:\pywk\clp>py24  trivcodec.py a b C D E F

'a' [1] -(encode)-> '\x00' [1]
'\x00' [1] -(decode)-> 'aaaaaaaa' [8]

'b' [1] -(encode)-> '\x01' [1]
'\x01' [1] -(decode)-> 'baaaaaa' [7]

'C' [1] -(encode)-> '\x03' [1]
'\x03' [1] -(decode)-> 'Caaaa' [5]

'D' [1] -(encode)-> '\x07' [1]
'\x07' [1] -(decode)-> 'Daaaa' [5]

'E' [1] -(encode)-> '\x0b' [1]
'\x0b' [1] -(decode)-> 'Eaaaa' [5]

'F' [1] -(encode)-> '\x0f' [1]
'\x0f' [1] -(decode)-> 'Faaaa' [5]

So we need to assign a code as the EOS.
And probably translate that to '' as the return char,
and end on that.

So now it does (having given up 1111 for EOS instead of F):

[10:22] C:\pywk\clp>py24  trivcodec.py

'abaDECbaabbD' [12] -(encode)-> 'r;Q\xf7' [4]
'r;Q\xf7' [4] -(decode)-> 'abaDECbaabbD' [12]

[10:22] C:\pywk\clp>py24  trivcodec.py a b C D E

'a' [1] -(encode)-> '\x1e' [1]
'\x1e' [1] -(decode)-> 'a' [1]

'b' [1] -(encode)-> '=' [1]
'=' [1] -(decode)-> 'b' [1]

'C' [1] -(encode)-> '\xf3' [1]
'\xf3' [1] -(decode)-> 'C' [1]

'D' [1] -(encode)-> '\xf7' [1]
'\xf7' [1] -(decode)-> 'D' [1]

'E' [1] -(encode)-> '\xfb' [1]
'\xfb' [1] -(decode)-> 'E' [1]

Goes to show you, eh? Slice and dice similar lines carefully ;-)

Regards,
Bengt Richter


From mwm at mired.org  Tue Apr 26 22:59:29 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 21:59:29 -0500
Subject: python equivalent of php implode
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<mailman.2520.1114531188.1799.python-list@python.org>
Message-ID: <8664y8lyb2.fsf@guru.mired.org>

Jeff Epler <jepler at unpythonic.net> writes:

>     items = query_param.items()
>     keys = [item[0] for item in items]
>     values = [item[1] for item in items]

Is there some reason not to do:

   keys = query_params.keys()
   values = query_params.values()

That would seem to be a lot more obvious as to what was going on.

     Thanks,
     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From grante at visi.com  Tue Apr 26 18:13:09 2005
From: grante at visi.com (Grant Edwards)
Date: Tue, 26 Apr 2005 22:13:09 -0000
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
Message-ID: <116tf7lm0ivnl6c@corp.supernews.com>

On 2005-04-26, dcrespo <dcrespo at gmail.com> wrote:

> Aparently, none of you has tried wxPython recently or properly.

Not so.  I'm using it currently and have been using it for a
couple years now.

> wxPython is a cross-platform toolkit. Currently supported platforms are
> 32-bit Microsoft Windows, most Unix or unix-like systems, and Macintosh
> OS X. Certainly, there may be Linux distributions where it doesn't run
> well...

I've no idea where that idea came from.  It runs just fine on
all the Linux distro's I've tried it on.

>> The PyGTK is a better choice if you are writing for Linux and
>> want your application to also be able to run on windows.
>
> I want exactly the opossite: my apps must be developed for
> running primarly under Windows but also be able to run on
> Linux.
>
> So, tell me PyGTK (with or without Glade/w XML output) or
> entirely Python code through wxPython? Truely, what's the best
> for CROSS-platform for both Linux and Windows? Not just for
> Linux or just for Windows, but for both.

Why don't you try them?  I've only used PyGTK under Linux, so I
can't vouche for it under Windows.  Under Linux it worked fine
for me.  I've used wxPython under Linux and deployed on
Windows.  Worked fine for me.

-- 
Grant Edwards                   grante             Yow!  If this is the DATING
                                  at               GAME I want to know your
                               visi.com            FAVORITE PLANET! Do I get
                                                   th' MICROWAVE MOPED?


From gandalf at geochemsource.com  Wed Apr 20 03:52:13 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Wed, 20 Apr 2005 09:52:13 +0200
Subject: Python instances
In-Reply-To: <1113983093.813565.23430@l41g2000cwc.googlegroups.com>
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>	<d450ub$2kp$1@news.web.de>
	<1113983093.813565.23430@l41g2000cwc.googlegroups.com>
Message-ID: <42660A2D.7030502@geochemsource.com>


>Guess i shouldn't think of the __init__(self) function as a constructor
>then.
>  
>
__init__ is THE constructor in Python


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From claird at lairds.us  Thu Apr 28 15:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 28 Apr 2005 19:08:03 GMT
Subject: Getting the sender widget's name in function (Tkinter)
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
	<opspvv1vyxrqur0o@eb.pragmadev> <jaa7k2-ccg.ln1@lairds.us>
	<42712098$0$26202$626a14ce@news.free.fr>
Message-ID: <3rn7k2-ka5.ln1@lairds.us>

In article <42712098$0$26202$626a14ce at news.free.fr>,
tiissa  <tiissa at free.fr> wrote:
			.
			.
			.
>So far, the OP is proposed the choice to either use the event/bind 
>mecanism or use different callbacks for his different buttons (either 
>with the method I proposed or not).

Thanks, Tissa.  Is there general understanding that "use different
callbacks ..." can be implemented as "parametrize the same callback
with a widget-specific value"?


From claird at lairds.us  Sun Apr  3 08:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Sun, 03 Apr 2005 12:08:03 GMT
Subject: text analysis in python
References: <mailman.1255.1112523725.1799.python-list@python.org>
Message-ID: <1325i2-sd2.ln1@lairds.us>

In article <mailman.1255.1112523725.1799.python-list at python.org>,
Maurice Ling  <mauriceling at acm.org> wrote:
			.
			.
			.
>In the Java world, there is GATE (general architecture for text 
>engineering) and it seems very impressive. Are there something like that 
>for Python?
			.
			.
			.
I don't know if you're aware that, in a fairly strong sense,
anything "[i]n the Java world" *is* "for Python".  If you
program with Jython (for example--there are other ways to
achieve much the same end), your source code can be in
Python, but you have full access to any library coded in Java.


From tiissa at nonfree.fr  Mon Apr 18 16:38:55 2005
From: tiissa at nonfree.fr (tiissa)
Date: Mon, 18 Apr 2005 22:38:55 +0200
Subject: Tkinter & Tkconstants
In-Reply-To: <1113854966.648882.235040@l41g2000cwc.googlegroups.com>
References: <1113854966.648882.235040@l41g2000cwc.googlegroups.com>
Message-ID: <42641ade$0$18328$636a15ce@news.free.fr>

codecraig wrote:
> from Tkinter import *
> 
> you have access to the constants in Tkconstants, since Tkinter imports
> it automatically.

Yes

> However, in the shell if I do..
> 
> from Tkinter import *
> 
> print Tkinter.HORIZONTAL
> 
> I get an error..NameError: Tkinter is not defined

Sure, you ask for Tkinter.HORIZONTAL. But if you directly ask for 
HORIZONTAL it should work.
indeed your from statement imported the _content_ of the Tkinter module 
in the global namespace not the module in itself.

It's either:
from Tkinter import *
print HORIZONTAL

or:
import Tkinter
print Tkinter.HORIZONTAL

or even:
import Tkinter
from Tkinter import *
print HORIZONTAL,Tkinter.HORIZONTAL

> 
> any ideas?
I usually only use:
import OneModule

Or sometimes:
from OneModule import OneClass, OneConstant

But I usually don't import a whole module in my global namespace.

> I get what i expect.  but according to the tutorial i should only need
> Tkinter.
You do.


From mahs at telcopartners.com  Mon Apr  4 23:51:14 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 04 Apr 2005 20:51:14 -0700
Subject: Unexpected result when comparing method with variable
In-Reply-To: <20050405033441.GA15819@arno2>
References: <20050405033441.GA15819@arno2>
Message-ID: <d2t1ub$5j4$1@sea.gmane.org>

David Handy wrote:
> I had a program fail on me today because the following didn't work as I
> expected:
> 
> 
>>>>class C:
> 
> ...     def f(self):
> ...         pass
> ...
> 
>>>>c = C()
>>>>m = c.f
>>>>m is c.f
> 
> False
> 
> I would have expected that if I set a variable equal to a bound method, that
> variable, for all intents and purposes, *is* that bound method, especially
> since I hadn't changed or deleted anything on the class or its instance.
> 
> The same thing happens when attempting to compare an unbound method with a
> variable name bound to that unbound method:
> 
> 
>>>>M = C.f
>>>>M is C.f
> 
> False
> 
> If I were to guess what is going on here, I would say that the expression
> c.f invokes a descriptor that manufactures a brand new "method object" each
> time.  

Yes, I believe that's the case.  See Martelli's recent 'Black Magic' PyCon 
presentation for some details of what's going on, but IIRC, the essence is that 
a bound method is produced by calling __get__ on the function, with the 
class/instance as the argument

The problem is, this is non-intuitive (to me) and prevented me from
> doing something I thought was useful.

Agreed that:
  >>> class C(object):
  ...     def f(self):pass
  ...
  >>> C.f is C.f
  False

is surprising
> 
> My use case is deferring operations till later, by placing tuples of a
> method and its arguments in a list to be processed at some future time, but
> doing some special-case processing only for certain methods:
> 
> deferred = []
> ...
> deferred.append((c.f, ('abc', 123)))
> 
> ...
> 
> for method, params in deferred:
>     method(*params)
>     if method is c.f:
>         # handle a special case
> 
> But I can't do that special-case handling this way, I have to resort to some
> other means to identify a method, "method is c.f" is always False. Which
> seems strange to me.

Another workaround is to compare method.im_func which does pass the identity test
...
> 
> If I complain about this, would I get any sympathy? ;)
> 
Sympathy, sure ;-)

> 
Michael



From philippe at philippecmartin.com  Mon Apr 25 16:38:22 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 25 Apr 2005 20:38:22 GMT
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
	<vi0q61pu6ou038asoc0okleerhg92ni8ic@4ax.com>
Message-ID: <2zcbe.312$461.60@newssvr11.news.prodigy.com>

This is highly frustrating !!

Did Athena come to help or not ?





Christos TZOTZIOY Georgiou wrote:

> On Mon, 25 Apr 2005 10:32:11 -0400, rumours say that rbt
> <rbt at athop1.ath.vt.edu> might have written:
> 
>>I do not seek to provoke. Sorry if my question comes across that way to
>>you.
> 
> Thanks for giving attention to my post, no need for apologies.
> 
> By the way, you didn't say in which way ReportLab and pdflib are not
> helpful to you (packages suggested directly by Mike Meyer and indirectly
> by me).



From jack at performancedrivers.com  Fri Apr  8 22:54:20 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 8 Apr 2005 22:54:20 -0400
Subject: Puzzling OO design problem
In-Reply-To: <1113010854.638038.173460@g14g2000cwa.googlegroups.com>
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
Message-ID: <20050409025420.GB21924@performancedrivers.com>

On Fri, Apr 08, 2005 at 06:40:54PM -0700, George Sakkis wrote:
> > Err, you might want to explain what these things do instead of an
> > abstract description of how you are doing it.  It looks like you are
> > using inheritance in the normal way _and_ you are using it to handle
> > versioning of some kind (maybe stable interface releases? I don't
> know).
> >
> > Let us know what parts need inheritance for, and what you have
> > just been using a side effect of inheritance for as a convenience
> > (versioning, I think).
> >
> > A more concrete example would be easier to comment on, if possible
> > do a simple one (maybe just two classes with two versions each).
> >
> > -jackdied
> 
> I intentionally abstracted the problem to remove the irrelevant
> details, but here's a more concrete (though still simplified) example.
> I hope it is more clear now.

<boiled down version of George's exmaple>

> def worldModelFactory(version):
>     if version < 2: return WorldModel()
>     else: return WorldModel_v2()
> 
> class WorldModel_v1(object):
>     class Player(object):
>       def foo(self): pass # v1 implementation of foo()
>
> class WorldModel_v2(object):
>     class Player(WorldModel_v2.Player):
>       def foo(self): pass # v2 implementation of foo()

So you are using the WorldModel_* classes as a namespace to hold a
set of classes that might inherit and extend or redefine the previous
classes in a WorldModel_* namespace.  This seems to do what you wanted
in your original post, namely if a class is defined in v1 but not in v2
that v2 would just use v1's implementation.  WorldModel_v2 will inherit
Player from _v1 by default, so that should work OK out of the box.

So you should be fine there, but I think your question is more practical
than "what is the proper OO way to do it?" which is a bit of a shibboleth
in python.  We like "what is easiest and readable?" So here are some
practical recommendations (well, at least that's my intention).

Are you using the *_v1 naming convention for backwards compatibility?
Backwards compatibility is a giant pain in the ass, I notice you are
posting from a .edu address so if this is just something you are working
on by yourself or in a small group drop the versioning aspects from the
code.  Talking to the other people in the group is easier.

>From your example (which I over-pruned) it looks like you are using
the WorldModel namespace to define parameters for running an iteration
of a game.  The classes under "WorldModel" are something like
the rules/physics definition (MovableObject), coordinates of the team-A
goalpost, coordinates of the team-B goalpost, team-A strategy (Player), 
and team-B strategy (also Player).  WorldModel would be the gameboard.

If so, make WorldModel just a board - drop putting Player etc under it
as a namespace,  and give it a run() function that takes parameters.
Name the Player derivatives as PlayerDumb,  PlayerSmart, PlayerAggressive 
etc, you'll probably have a lot more of those than goals or physics rules.
The actual main routine would look something like

ob = WorldModel() # standard 100x100 board
winner = ob.run(physics=MovableObject,  # defines friction and gravity
                team_a_goal=(50,25),
                team_b_goal=(5,5),
                team_a_strategy=PlayerDumb,
                team_b_strategy=PlayerAggressive,
               )
print "Winner is ", winner

I wrote more than I meant to, but the basic idea is don't use classes
when you don't need to - it just makes things more complex.  That 
should give you more time to tackle the interesting parts (player 
strategies, I'd imagine).

-jackdied


From radam2 at tampabay.rr.com  Fri Apr  1 12:37:40 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Fri, 01 Apr 2005 17:37:40 GMT
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <d2j9nf$h0g$1@news.sap-ag.de>
	<du7ll82mza9.fsf@lehtori.cc.tut.fi>
Message-ID: <d61r4199qneds50qi5fiatkmun3reh21ia@4ax.com>

On 01 Apr 2005 15:55:58 +0300, Ville Vainio <ville at spammers.com>
wrote:

>>>>>> "Daniel" == Daniel Dittmar <daniel.dittmar at sap.corp> writes:
>
>    Daniel> Ville Vainio wrote:
>
>    >> I need a dict (well, it would be optimal anyway) class that
>    >> stores the keys as strings without coercing the case to upper
>    >> or lower, but still provides fast lookup (i.e. uses hash
>    >> table).
>
>    Daniel> Store the original key together with the value and use a
>    Daniel> lowercase key for lookup.
>
>That's what I thought initially, but the strings take most of the
>space in dict and I didn't feel like doubling the size.
>
>It would be the "simplest thing that could possibly work", though.

Try access the keys indirectly though another dictionary.  That way
you don't have to change the original.

Lkeys = {}
for k dict.keys():
	Lkeys[ k.lower] = dict[k]

Then use:

value = dict[ Lkeys[ key.lower() ] ]

To get your value from the original dictionary.

Watch out for duplicate keys in differing case in the original dict. 


Ron



From tores at stud.cs.uit.no  Thu Apr 14 10:55:49 2005
From: tores at stud.cs.uit.no (Tor Erik Sønvisen)
Date: Thu, 14 Apr 2005 16:55:49 +0200
Subject: EOF-file missing
Message-ID: <d3m09j$12m2$1@news.uit.no>

Hi

>From a client I read a file into a string using read().
On the server-side (it's a HTTPServer) i access the same string through the 
input stream rfile.
However all useful read-methods (readlines, readline, read) expect an EOF 
before terminating.
And for some reason the stream doesn't have the seek method either, so it's 
impossible to set the file-pointer to the end of the stream.
how can I access the whole string then?
Is it possible to add an EOF to the string before sending it from the 
client? Or maybe there are other solutions?

regards 




From zsolt-googleP6463 at mailblocks.com  Wed Apr 13 17:01:49 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 13 Apr 2005 14:01:49 -0700
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <1113422698.396417.45280@l41g2000cwc.googlegroups.com>

Python is great, but having much "admin" type experience, I've found
python to be less than Ideal when dealing with system calls and
standard Input Ouput.

For example, I've written complex tools that use perforce, I've taken
advantage of both regular IO and the perforce marshalled IO.  Under
heavy load, some of the threads in my scripts experience IO hang (Linux
and WIndows) (solaris and BSD were fine).  I did not get the same
behavior with Perl.

Having said that I still do 99% of my utilities in python.  Just be
aware.



From cam.ac.uk at mh391.invalid  Fri Apr 29 19:40:50 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 30 Apr 2005 00:40:50 +0100
Subject: Best way to parse file into db-type layout?
In-Reply-To: <v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
Message-ID: <d4ugm6$3r2$1@gemini.csx.cam.ac.uk>

John Machin wrote:
 > [Michael Hoffman]:
>>John Machin wrote:
>>>[Michael Hoffman]:
>>>
>>>>for row in csv.reader(fileinput.input()):
>>>
>>>csv.reader requires that if the first arg is a file that it be opened
>>>in binary mode.
>>
>>fileinput.input() is not a file.
> 
> Hair-splitter.

Is name-calling really necessary?

> It's an awk simulation and shouldn't be used for real-world data.

I don't see why not, so long as your data is text.

>>I have tested this code and it works fine for the provided example.
> 
> Well I've got news for you: real-world data has embedded CRs, LFs and
> (worst of all) ^Zs often enough, and you won't find them mentioned in
> any documentation, nor find them in examples.

That's nice. Well I agree with you, if the OP is concerned about embedded
CRs, LFs and ^Zs in his data (and he is using Windows in the latter case),
then he *definitely* shouldn't use fileinput.

And otherwise, there's really no reason not to.
-- 
Michael Hoffman


From mylastnameruntogether at mycompanyname.com  Tue Apr 12 12:10:15 2005
From: mylastnameruntogether at mycompanyname.com (Brandon J. Van Every)
Date: Tue, 12 Apr 2005 16:10:15 GMT
Subject: web authoring tools
References: <Xns9635B27CBB14Evaneveryindiegamedes@207.69.189.191>
	<mailman.1736.1113291110.1799.python-list@python.org>
Message-ID: <Xns96365D77A1AE5vaneveryindiegamedes@207.69.189.191>

Steve Holden <steve at holdenweb.com> wrote in
> Brandon J. Van Every wrote:
>> 
>> I believe Dreamweaver-esque.  I see myself writing articles and
>> eventually doing snazzy eye candy layouts.  I do not see myself
>> engaging in elaborate flow control or anything terribly programmatic.
>>  I want to concentrate on the content, not the mechanism.
>> 
>> 
> I've stayed out of this one so far because of a natural disinclination
> to join religious discussions, but sine we are now talking good common
> sense I'd like to ask whether a *batch-oriented* system for folding 
> database content into a static web site with common look-and-feel
> would be of interest.
> 
> Now PyCon is over I've been able to blog about the techniques used to 
> generate the web site at http://www.holdenweb.com/, and most recently 
> about using reStructured Text in the database to ease authorship 
> problems for the less-taxing content. See
> 
> http://www.holdenweb.com/blogs/2005/04/versioned-reviews-implemented-po
> st.html 
> 
> to determine whether the overall approach would work for you.

I have 2 goals:

1) to worry about plumbing as little as possible, as I generate articles 
and content.  Once a framework is established, this can be handled 
"cookie cutter."

2) to create a unique brand identity based on good eye candy.  For this 
part of the problem, the website cannot look generic.  At a minimum, I 
would need a facility that allows me to painlessly arrange my own 2D 
artwork.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

"The pioneer is the one with the arrows in his back."
                          - anonymous entrepreneur


From bdesth.quelquechose at free.quelquepart.fr  Sun Apr 24 15:47:55 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 24 Apr 2005 21:47:55 +0200
Subject: Python or PHP?
In-Reply-To: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
Message-ID: <426bf398$0$20479$626a14ce@news.free.fr>

Lad a troll? :
> Is anyone capable of providing Python advantages over PHP if there are
> any?

Why don't you check by yourself ?


From dcrespo at gmail.com  Tue Apr 26 17:46:05 2005
From: dcrespo at gmail.com (dcrespo)
Date: 26 Apr 2005 14:46:05 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <d4j8qk$tc1$1@domitilla.aioe.org>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
Message-ID: <1114551965.718056.197480@g14g2000cwa.googlegroups.com>

Hi all... Thank you for your answers...

wxPython, under Linux, tries to use GTK... A better way to say it is:
wxPython uses whatever it needs: under Windows, his API; under Linux,
his API (may imply the use of GTK or GNOME), etc...

Aparently, none of you has tried wxPython recently or properly.
wxPython is a cross-platform toolkit. Currently supported platforms are
32-bit Microsoft Windows, most Unix or unix-like systems, and Macintosh
OS X. Certainly, there may be Linux distributions where it doesn't run
well...

> The PyGTK is a better choice if you are writing for
> Linux and want your application to also be able to run on windows.

I want exactly the opossite: my apps must be developed for running
primarly under Windows but also be able to run on Linux.

So, tell me PyGTK (with or without Glade/w XML output) or entirely
Python code through wxPython?
Truely, what's the best for CROSS-platform for both Linux and Windows?
Not just for Linux or just for Windows, but for both.

Anyone who had used any a lot?

Thanks

Daniel



From tjreedy at udel.edu  Fri Apr  1 14:23:31 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 14:23:31 -0500
Subject: Pseudocode in the wikipedia
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>
Message-ID: <d2k70u$70h$1@sea.gmane.org>


<bearophileHUGS at lycos.com> wrote in message 
news:1112362451.848227.208120 at z14g2000cwz.googlegroups.com...
> The free wikipedia is adopting a standard pseudocode:
> http://en.wikipedia.org/wiki/Wikipedia_talk:Wikicode/Specification
>
> MShonle says something nice:

Calling a feature 'baggage' is not especially nice.  Neither is getting 
facts wrong.

> I support the idea of wikicode. Basically I think we should present
> code in a Python-like language that doesn't carry so much baggage. For
> example, we can use English sentences (or sentence fragments) instead
> of requiring the reader to understand some obscure Python library.
> (Further, Python has the baggage that there are no block-terminators:

Python does too have block terminators.  They are called dedents.  In doing 
so it follows standard English outline formatting and the practice of many 
algorithm pseudocode writers.  (I roughly estimate around half or more.) 
Two examples I have handy:  Jon Bently in Programming Pearls and Steven 
Skiena in The Algorithm Design Manual.

> i.e., no "}" or "end"s or "fi"s or "repeat"s.

So add #whateve-ender-you want, but leave the code executable if at all 
possible.

> By adding such terminators, we can make it a lot less ambiguous to all 
> readers.

Dedents are unambiguous.  Be adding additional redundant terminators, one 
adds the possibility of mismatch and ambiguity.

Terry J. Reedy





From cpl.19.ghum at spamgourmet.com  Sat Apr 23 10:41:16 2005
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Sat, 23 Apr 2005 14:41:16 +0000 (UTC)
Subject: a=[ lambda t: t**n for n in range(4) ]
References: <42698692$1@nntp0.pdx.net>
	<mailman.2339.1114242211.1799.python-list@python.org>
Message-ID: <Xns9641A9CF5AD4Bcpl19ghumspamgourmet@195.20.224.116>

Mage <mage at mage.hu> wrote in news:mailman.2339.1114242211.1799.python-

> The "lambda functions" was an unclear part of the tutorial I read.
> Should I use them? Are they pythonic?
> As far I see they are good only for type less a bit.

And to obfusicate code. lambda is evil, do not play with it.

Harald


From greg at cosc.canterbury.ac.nz  Thu Apr  7 23:30:03 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 08 Apr 2005 15:30:03 +1200
Subject: Using weakrefs instead of __del__
In-Reply-To: <1112808016.630995.87690@l41g2000cwc.googlegroups.com>
References: <1112808016.630995.87690@l41g2000cwc.googlegroups.com>
Message-ID: <3bmc6aF6jt8okU1@individual.net>

Rhamphoryncus wrote:
> class RealFoo:
>   refs = set()
>   def __init__(self, front):
>     self.refs.add(weakref.ref(front, self.cleanup))
>   def blah(self):
>     print "Blah!"
>   def cleanup(self, ref):
>     print "Doing cleanup"
>     self.refs.remove(ref)

That won't work, because the bound method you're using as
the cleanup function contains a reference to the object,
preventing it from being deallocated.

The weakref callback is only called *after* the object has
been deallocated. If you try to contrive a way of passing the
object to the callback, you will just end up keeping it alive.
To use a weakref as a finalizer, the information needed
for finalization needs to be kept somewhere outside of
the object triggering the finalization.

This may be what you were trying to achieve by separating
your object into a Foo and a RealFoo. If that's so, you
should have made the weak ref point to the Foo, not the
RealFoo.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From thesonoftruth at aol.com  Mon Apr 18 03:02:23 2005
From: thesonoftruth at aol.com (thesonoftruth)
Date: 18 Apr 2005 00:02:23 -0700
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven wh
References: <1113707535.383715.327170@g14g2000cwa.googlegroups.com>
	<rzl8e.7988$sp3.2080@newsread3.news.atl.earthlink.net>
Message-ID: <1113806696.907908.323410@g14g2000cwa.googlegroups.com>

I wonder if anyone yells VISHNU !!  VISHNUUUUUUUUUUUUU !  when making
out,



From yhdanid at yahoo.com  Sat Apr 30 15:44:28 2005
From: yhdanid at yahoo.com (Obaid R.)
Date: 30 Apr 2005 12:44:28 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
	<LXsce.2698$zu.1067@newssvr13.news.prodigy.com>
	<OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
	<1114831490.664193.236140@l41g2000cwc.googlegroups.com>
	<eJOor1ZTFHA.228@TK2MSFTNGP10.phx.gbl>
Message-ID: <1114890268.799739.309290@g14g2000cwa.googlegroups.com>

Donald L McDaniel wrote:

> 1) I am posting to a newsgroup on the Microsoft Usenet Server.  It's
not my
> fault the demon-lover who posted the original anti-Christian article
> cross-posted to so many newsgroups across so many servers.  Talk to
him
> about cross-posting.
> 1) I will go away, when Christ returns for me.  I hope you are ready
for His
> return, else you are in for a living Hell here on the Earth before
the REAL
> Hell rises up to swallow you in its Flames.
>
> --
> Donald L McDaniel
> Please reply to the original thread,
> so that the thread may be kept intact.
> ==============================


And the demon lover would be the one who
quotes from the "word of God" as reported in
your own Bible which proclaims that "God is
not a man ... neither the son of man"
(Numbers 23: 19)? Is it your contention that
this is demonic truth? See what the world is
comming to?

And it was not I who originally cross-posted
as you claim. I was replying to Mr. Grossi
who did start the cross-posting. Does your
words: "the demon-lover who posted the
original anti-Christian article cross-posted
to so many newsgroups across so many servers"
apply to him? Here is a quote from the head
of his original post:

>From: RonGrossi382... at yahoo.com
>Newsgroups:
Microsoft.public.windowsxp.network_web,rec.music.beatles,rec.music.makers.guitar.acoustic,alt.showbiz.gossip,comp.lang.python



In case you are interested in comparitive
religion then maybe these links might be of
help:


Qur'an:
=======
[1] Download a free Qur'an viewer:
http://www.divineislam.co.uk/


Audio:
======
[1] Christ in Islam - Parts 1, 2 & 3; a lecture by Ahmed Deedat.
http://islam.org/audio/ra622_1.ram

[2] Crucification: Fact or Fiction - Parts 1, & 2; a Christain Muslim
debate in the USA with a Christian and Muslim audience in attendence.
http://islam.org/audio/ra622_3.ram

[3] Is the Bible God's Word - Parts 1, & 2; a Christian Muslim debate
in the USA with a Christian and Muslim audience in attendence.
http://islam.org/audio/ra622_4.ram

[4] Audio & Video Files; Misc. topics.
http://www.beconvinced.com/SPEECHES.htm


Articles and booklets:
======================
[1] Christ In Islam by Sheikh Ahmad Deedat.
http://www.thestraightway.com/literature/0011.html

[2] What Does the Bible Say about Mohammed (PBUH)? by Sheikh Ahmad
Deedat.
http://www.thestraightway.com/literature/0014.html

[3] The God That Never Was by Sheikh Ahmad Deedat.
http://www.thestraightway.com/literature/0016.html

[4] What was the Sign of Jonah? by Sheikh Ahmad Deedat.
http://www.thestraightway.com/literature/0017.html

[5] Who moved the Stone?  by Sheikh Ahmad Deedat.
http://www.thestraightway.com/literature/0018.html

[6] Resurrection or Resuscitation? by Sheikh Ahmad Deedat.
http://www.thestraightway.com/literature/0019.html

[7] Other work by Sheikh Ahmed Deedat. 
http://www.jamaat.net/deedat.htm



From fredrik at pythonware.com  Tue Apr 12 05:44:20 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 11:44:20 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net><20050411194907.1769.17472.XPN@orion.homeinvalid>
	<425AF2FD.2080006@v.loewis.de>
Message-ID: <d3g53t$ggc$1@sea.gmane.org>

Martin v. L?wis wrote:

>> What happens if I try to install Python2.4 on a system wich doesn't have
>> the dll?
>
> It will just work. Python installs the DLL if it is missing, and leaves
> it alone (just incrementing the refcount) if it is present on the target
> system.

installs it where?  the MS docs seem to indicate that they want you to install
it in the program directory, rather than in a "shared" location:

    http://support.microsoft.com/default.aspx?scid=kb;en-us;326922

</F> 





From rodney.maxwell at gmail.com  Sun Apr 17 21:16:28 2005
From: rodney.maxwell at gmail.com (Rodney Maxwell)
Date: 17 Apr 2005 18:16:28 -0700
Subject: python.exe on Mac OS X!?
In-Reply-To: <mailman.2035.1113784817.1799.python-list@python.org>
References: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>
	<mailman.2035.1113784817.1799.python-list@python.org>
Message-ID: <1113786988.312168.265180@g14g2000cwa.googlegroups.com>

> The default file system on MacOSX is case insensitive.  As a result
the .exe
> extension is required to disambiguate the generated executable from
the 
> Python directory in the source distro. 

OK. I got it.



From dan at dontspammecauseidontlikit.com  Wed Apr 13 20:50:07 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Thu, 14 Apr 2005 08:50:07 +0800
Subject: Can't Stop Process On Windows
References: <lifm51hf5mhgl5sqf07a0uv8l0co0deu9h@4ax.com>
	<mailman.1750.1113310392.1799.python-list@python.org>
Message-ID: <hgfr51lsd34c41ebfphuubhn08s4krhmo2@4ax.com>

On Tue, 12 Apr 2005 06:53:04 -0600, Dave Brueck
<dave at pythonapocrypha.com> wrote:


>Are you calling select with a long timeout? An alternative would be to call 
>select with a much shorter timeout, but call it multiple times from a loop.

That seems to have fixed the problem.  Changed it from no timeout to
one second.

Thanks

Dan



From mahs at telcopartners.com  Fri Apr 15 00:17:54 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 14 Apr 2005 21:17:54 -0700
Subject: pythonic use of properties?
In-Reply-To: <5e183f3d05041420053ecd0ee@mail.gmail.com>
References: <5e183f3d05041420053ecd0ee@mail.gmail.com>
Message-ID: <d3nf2n$fm5$1@sea.gmane.org>

Marcus Goldfish wrote:
> I'd like advice/opinions on when it is appropriate to do

Just an opinion...
> attribute/property validation in python.  I'm coming from a C#/Java
> background, where of course tons of "wasted" code is devoted to
> property validation.  Here is a toy example illustrating my question:
> 
> #   Example: mixing instance attributes with properties.  Is it pythonic to
> #   validate property data in setters?  Since tens and ones are never
> #   validated, the class can be "broken" by setting these directly
> class SillyDecimal(object):
>    """A silly class to represent an integer from 0 - 99."""
>    def __init__(self, arg=17):
>        if isinstance(arg, tuple):
>            self.tens = arg[0]
>            self.ones = arg[1]
>        else:
>            self.number = arg
> 
>    def getNumber(self):
>        return self.tens*10 + self.ones
>    def setNumber(self, value):
>        if value < 0 or value > 99:
>            raise ArgumentException("Must in [0, 99]")
>        self.tens = value // 10
>        self.ones = value % 10
>    number = property(getNumber, setNumber, None, "Complete number, [0-99]")

It is conventional to indicate 'private' attributes with the _ prefix.
By this standard, you have three 'public' interfaces: number, get/setNumber and 
ones/tens, which is confusing and error-prone.  Moreover, if you are going to 
validate number, it might make more sense to put all the validation logic into 
the setter vs. splitting some into __init__.  So your class could look like:

class SillyDecimal1(object):
     """A silly class to represent an integer from 0 - 99."""
     def __init__(self, value = 17):
         self.number = value
     def _getNumber(self):
        return self._tens*10 + self._ones
     def _setNumber(self, value):
         if isinstance(value, tuple):
             value  = value[0] * 10 + value[1]
         if value in range(100):
             self._tens = value /10
             self._ones = value % 10
         else:
             raise ValueError, "Number out of range(100)"
     number = property(_getNumber, _setNumber, None, "Complete number, [0-99]"

There is nothing to stop a user from setting _tens and _ones directly, but their 
names indicate that this should not be done.

As for whether it is appropriate to validate the value at all, I think that 
depends on your larger design.

Note that one of the main purposes of properties is retrofitting bare attributes 
with getters/setters.  So, an initial version of  your class might be:

class SillyDecimal0(object):
     """A silly class to represent an integer from 0 - 99."""
     def __init__(self, value = 17):
         self.number = value

Later you can add the getter/setter/property logic if it turns out to be 
necessary, without changing the interface (except for the addition of a couple 
of 'private' attributes and 'private' methods, which well-behaved callers should 
not touch anyway.


Michael



From fredrik at pythonware.com  Tue Apr 19 06:24:22 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 19 Apr 2005 12:24:22 +0200
Subject: Why does python class have not private methods? Will this
	neverchanged?
References: <311b5ce105041902165a0969a0@mail.gmail.com>
Message-ID: <d42m0t$s26$1@sea.gmane.org>

"could ildg" <could.net at gmail.com> wrote:

> Private stuff always makes programming much easier.

says who?

</F> 





From simon.brunning at gmail.com  Wed Apr  6 11:50:19 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 6 Apr 2005 16:50:19 +0100
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <4253fe0c$1@nntp0.pdx.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com> <4253fe0c$1@nntp0.pdx.net>
Message-ID: <8c7f10c6050406085020a24b44@mail.gmail.com>

On Apr 6, 2005 4:42 PM, Scott David Daniels <Scott.Daniels at acm.org> wrote:
> I've always wondered about this turn of phrase.  I seldom
> eat a cake at one sitting.

Clearly you're just not trying. ;-)

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From dmj111.9352919 at bloglines.com  Fri Apr  8 22:14:52 2005
From: dmj111.9352919 at bloglines.com (David Jones)
Date: Fri, 08 Apr 2005 22:14:52 -0400
Subject: Python extension performance
Message-ID: <WqydncT1Hq80p8rfRVn-2w@adelphia.com>

Hi,

I am trying to hunt down the difference in performance between some raw 
C++ code and calling the C++ code from Python.  My goal is to use Python 
to control a bunch of number crunching code, and I need to show that 
this will not incur a (big) performance hit.

This post includes a description of my problem, ideas I have for the 
cause, and some things I plan to try next week.  If anyone knows the 
real cause, or thinks any of my ideas are way off base, I would 
appreciate hearing about it.

My C++ function (testfunction) runs in 2.9 seconds when called from a 
C++ program, but runs in 4.3 seconds when called from Python. 
testfunction calculates its own running time with calls to clock(), and 
this is for only one iteration, so none of the time is in the SWIG code 
or Python.

Both the C++ executable and python module were linked from the same 
object files, and linked with the same options.  The only difference is 
that the Python module is linked with -shared, and the C++ code is not.

The computer is an Itanium 2.  The code was compiled with the Intel 
Compiler, and uses the Intel Math Libraries.  Python is version 2.2 
(with little hope of being able to upgrade) from the Red Hat rpm 
install.  When I link the C++ exe, I get some warnings about "log2l not 
implemented" from libimf, but I do not see these when I link the Python .so.

Some potential causes of my problems:

- linking to a shared library instead building a static exe.
- intel libraries are not being used when I think they are
- libpython.so was built with gcc, so I am getting some link issues
- can linking to python affect my memory allocation and deallocation in 
c++??

Some things I can try:

- recompile python with the intel compiler and try again
- compile my extension into a python interpreter, statically
- segregate the memory allocations from the numerical work and compare 
how the C++ and Python versions compare


--end brain dump

Dave


From mcfletch at rogers.com  Mon Apr 18 12:55:16 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Mon, 18 Apr 2005 12:55:16 -0400
Subject: Any movement on FreeBSD segfaults when using threads?
Message-ID: <4263E674.8060406@rogers.com>

There was a post a few months ago from "snacktime" in which they
described a failure when running under Twisted:

    http://mail.python.org/pipermail/python-list/2005-February/265137.html

which they eventually narrowed down to an apparent problem with pycrypto:

    http://mail.python.org/pipermail/python-list/2005-February/265146.html

and which generated this sourceforge bug report for Python:

    http://twistedmatrix.com/pipermail/twisted-python/2005-February/009475.html
    http://sourceforge.net/tracker/index.php?func=detail&aid=1080660&group_id=5470&atid=105470

I am seeing a similar effect, (though only after the program has been
running a few days), in one of our products running on FreeBSD 5.3-RC2
with Python 2.3.4, PyOpenSSL 0.6, Twisted 2.0, and PyPgSQL 2.4 (which is
somewhat different than snacktime's library collection (different
OpenSSL and PostgreSQL bindings)).  Note particularly, that the PyCrypto
library to which the problem was apparently localised is *not* installed
on the failing machine.

As with snacktime, I see the failure coming from pthread_testcancel()

    (gdb) bt
    #0  0x28222f17 in pthread_testcancel () from /usr/lib/libpthread.so.1
    #1  0x2821b39f in pthread_mutexattr_init () from
    /usr/lib/libpthread.so.1
    #2  0x00000000 in ?? ()

I haven't been able to isolate the failures to a particular piece of
code (this is showing up on a live server, so I'm hesitant to run under
gdb for a couple of days to try to catch the failure).  I'm *not* using
RSA encryption (which was the area to which snacktime localised their
problem).  I *do* use SSL sockets from Twisted, however.  I am running a
background thread for database access, with a Queue mediating the set of
items to process and reactor.callFromThread returning control to Twisted
when the items are finished.

Anyway, my question is really "has this been solved already"?  If so,
what was the solution?  If not, I'll have to work at building a minimal
failing test case so I can begin to debug it.

Thanks for any information,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From rkern at ucsd.edu  Wed Apr 27 13:30:26 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 27 Apr 2005 10:30:26 -0700
Subject: How do I parse this ? regexp ?
In-Reply-To: <1114620387.283743.163460@z14g2000cwz.googlegroups.com>
References: <mailman.2587.1114618447.1799.python-list@python.org>
	<1114620387.283743.163460@z14g2000cwz.googlegroups.com>
Message-ID: <d4ohtd$m1q$1@sea.gmane.org>

serpent17 at gmail.com wrote:
> Thank you, it works, but I guess not all the way:
> 
> for instance, I have this:
> 04242005 18:20:42-0.024329, 271.2469504, [-4.097900390625,
> 3.4332275390625, 105.062255859375], [0.0384521484375, 0.08416748046875,
> -1.026885986328125], [0.00640869140625, 0.00885009765625,
> 0.00701904296875]
> 
> translates into
> 
> 
> '04242005 18:20:42-0.024329  271.2469504   -4.097900390625
> 3.4332275390625  105.062255859375    0.0384521484375  0.08416748046875
> -1.026885986328125    0.00640869140625  0.00885009765625
> 0.00701904296875 \n'
> 
> but I need to remove the first - between 18:20:42 and 0.024329 but not
> the others.

Use the find() method on the string to locate the index of this first 
'-', then break the line into two parts before and after the '-'.

You should spend some quality time with the string documentation to 
internalize the possibilities for yourself. There's only so much work we 
can do for you. Also, take a look at David Mertz's fine _Text Processing 
in Python_ available in dead-tree form or online.

http://gnosis.cx/TPiP/

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From cam.ac.uk at mh391.invalid  Sat Apr 30 06:35:05 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 30 Apr 2005 11:35:05 +0100
Subject: Best way to parse file into db-type layout?
In-Reply-To: <a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>
	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>
Message-ID: <d4vn0s$i3b$1@gemini.csx.cam.ac.uk>

John Machin wrote:

> I beg your pardon. How does: "Your point addresses the letter rather
> than the spirit of the 'law'" sound?

Sure, thanks.

> Real-world data is not "text".

A lot of real-world data is. For example, almost all of the data I deal with
is text.

>>That's nice. Well I agree with you, if the OP is concerned about embedded
>>CRs, LFs and ^Zs in his data (and he is using Windows in the latter case),
>>then he *definitely* shouldn't use fileinput.
> 
> And if the OP is naive enough not to be concerned, then it's OK, is
> it?

It simply isn't a problem in some real-world problem domains. And if there
are control characters the OP didn't expect in the input, and csv loads it
without complaint, I would say that he is likely to have other problems once
he's processing it.

> Except, perhaps, the reason stated in fileinput.py itself: 
> 
> """
> Performance: this module is unfortunately one of the slower ways of
> processing large numbers of input lines.
> """

Fair enough, although Python is full of useful things that save the
programmer's time at the expense of that of the CPU, and this is
frequently considered a Good Thing.

Let me ask you this, are you simply opposed to something like fileinput
in principle or is it only because of (1) no binary mode, and (2) poor
performance? Because those are both things that could be fixed. I think
fileinput is so useful that I'm willing to spend some time working on it
when I have some.
-- 
Michael Hoffman


From mahs at telcopartners.com  Sat Apr  9 12:36:46 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 09 Apr 2005 09:36:46 -0700
Subject: Are circular dependencies possible in Python?
In-Reply-To: <IEosBE.GtB@bath.ac.uk>
References: <IEosBE.GtB@bath.ac.uk>
Message-ID: <d3905o$ugc$1@sea.gmane.org>

Tim Tyler wrote:
> Like C, Python seems to insist I declare functions before calling
> them - rather than, say, scanning to the end of the current script
> when it can't immediately find what function I'm referring to.
> 
> C lets you predeclare functions to allow for the existence of
> functions with circular dependencies.
> 
> Does Python allow you to do something similar?
> 
> If not how do you create functions with circular dependencies in
> Python - where function A could call function B; and function
> B could call function A - or is that not possible?
Of course, for example:

def A(*args):
     if len(args) > 1:
         print "Calling B%s" % repr(args[1:])
         return B(*args[1:])
     else:
         print "A Called with: %s" % args[0]

def B(*args):
     if len(args) > 1:
         print "Calling A%s" % repr(args[1:])
         return A(*args[1:])
     else:
         print "B Called with: %s" % args[0]

  >>> A("Arg1","Arg2","Arg3","Arg4")
  Calling B('Arg2', 'Arg3', 'Arg4')
  Calling A('Arg3', 'Arg4')
  Calling B('Arg4',)
  B Called with: Arg4
  >>>

Functions have to exist before you call them, but they are not 'declared'.  def 
and its enclosed suite is a statement, like print, while, etc...  The def 
statement is executed to define the function.  For functions defined at module 
level, this statement is executed when the module is first imported (or 
reloaded) in source-code order along with any other module-level code.

Executing a def statement compiles (but does not execute) the body of the 
function.  Each function, when def'd also gets a reference to the global scope 
in which it is defined.  When you execute the function body (by calling the 
function), identifiers that are not resolved in the functions own local scope 
are looked up in this global scope.

So in the example above, the body of A calls B.  B is not defined in A's local 
scope, so it is looked up in A's globals, which is the module.  As long as def 
B(... has been executed in the same module before you first call A, everything 
is fine.


Michael



From bvande at po-box.mcgill.ca  Fri Apr 22 11:39:03 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Fri, 22 Apr 2005 11:39:03 -0400
Subject: Overiding error message when using a python program
In-Reply-To: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
References: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
Message-ID: <42691A97.8030406@po-box.mcgill.ca>

aleksander.helgaker at gmail.com said unto the world upon 2005-04-22 10:45:
> I've completely rewritten a calculator I wrote to help me learn Python.
> After someone told me about the def command I reliesed that I could
> make the program much better, but there is a very anoying problem which
> ocours when I run the program.
> 
> Here is the code
> <code>
> # IMPOSRTS #
> import sys
> import os
> 
> # DEF'S #
> def print_intro():
> 	os.system('clear')
> 	print "Welcome to Calc v 0.1a"
> 	print "----------------------"
> 
> def main():
> 	print_intro()
> 	while True:
> 		prompt_user()
> 
> def prompt_user():
> 	userinput = input(">")
> 
> def fib(n): # write Fibonacci series up to n
> 	"""Print a Fibonacci series up to n."""
> 	a, b = 0, 1
> 	while b < n:
> 		print b,
> 		a, b = b, a+b
> 		print
> 
> def quit():
> 	sys.exit()
> 
> # PROGRAM FLOW
> main()
> </code>
> 
> Now when I run this program and I type in a command which I have no
> code for e.g. "pi" (which is 3,14....) I get the error message
> "NameError: name 'pi' is not defined" and then the program quits.
> 
> I'm creating this program for my own use but naturally sometimes I
> would make spelling mistakes (being a dyslexic and all) and so having a
> long error message and having the program quit is more then a bit
> irritating. It would be much more preferable if the program simply
> wrote "Command not recognised" and then kept going. Is this possible?
> 

Sure, its possible. How to do it from where you are is a bit more 
dark; you've not included the part of your code which acts on the 
user's input. (And your prompt_user function should use raw_input and 
return the user input for processing by other functions. raw_input is 
safer; input executes arbitrary code.)

I see just before sending, that you seemed happy with Simon Brunning's 
suggestion. But, as I hate to waste the typing, here's another way 
sketched:

def funct1():
     print 'This is funct1'

def funct2():
     print 'This is funct2'

funct_dict = {'1': funct1, '2': funct2}
# strings as keys because of raw_input
# functions are objects, and thus can be values in a dict

def prompt_user():
     return raw_input('Well?')

def dispatch(request):
     function = funct_dict.get(request, None)
     if function:
         function()
     else:
         print 'You entered %s, but there is no such command' %request


Put that in a script and run

dispatch(prompt_user())

and you should see the desired behaviour. I will leave integrating the 
idea into the structure you have as yet to you.

HTH,

Brian vdB



From modelnine at ceosg.de  Sat Apr 30 16:28:10 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sat, 30 Apr 2005 22:28:10 +0200
Subject: Writing to log file when script is killed
In-Reply-To: <1114864012.637007.295800@z14g2000cwz.googlegroups.com>
References: <1114851873.072376.225820@z14g2000cwz.googlegroups.com>
	<1114864012.637007.295800@z14g2000cwz.googlegroups.com>
Message-ID: <200504302228.13863.modelnine@ceosg.de>

Am Samstag, 30. April 2005 14:26 schrieb wittempj at hotmail.com:
> If you run on unix you can use the signal module to intercept a kill -
> see http://docs.python.org/lib/node368.html for a quick example

You cannot intercept a kill (that's the whole meaning of SIGKILL, rather than 
SIGTERM)... Read up on UNIX signal handling.

But, for the rest: you could intercept SIGTERM, log a message, and raise a 
SystemExit exception. That should do the trick.

-- 
--- Heiko.
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From martin at v.loewis.de  Mon Apr 18 13:34:12 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 18 Apr 2005 19:34:12 +0200
Subject: EasyDialogs module problem with python 2.4.1
In-Reply-To: <C4S8e.1063265$Xk.1017278@pd7tw3no>
References: <C4S8e.1063265$Xk.1017278@pd7tw3no>
Message-ID: <4263EF94.9060806@v.loewis.de>

scott wrote:

> EasyDialogs module
> 
> ( http://www.python.org/doc/2.4.1/mac/module-EasyDialogs.html )
> 
> works with pyshell (interactive python program included with wxPython)
> but not with python launched at the terminal:

Could you be more precise what "works not" means? What do you expect
to happen, what happens instead?

Did you try pythonw?

Regards,
Martin


From steve at holdenweb.com  Thu Apr  7 12:51:45 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 07 Apr 2005 12:51:45 -0400
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <42556347.9030901@chamonix.reportlab.co.uk>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<mailman.1222.1112417820.1799.python-list@python.org>	<d2vhi8$k29$1@panix1.panix.com>	<4253fe0c$1@nntp0.pdx.net>
	<3bjtvuF6d00nnU2@individual.net>
	<42556347.9030901@chamonix.reportlab.co.uk>
Message-ID: <d33oab$t78$1@sea.gmane.org>

Robin Becker wrote:
> Greg Ewing wrote:
> 
>> Scott David Daniels wrote:
>>
>>> Aahz wrote:
>>>
>>>> You just can't have your cake and eat it, too.
>>>
>>>
>>>
>>> I've always wondered about this turn of phrase.  I seldom
>>> eat a cake at one sitting.
>>
>>
>>
>> You need to recursively subdivide the cake until
>> you have a piece small enough to fit in your input
>> buffer. Then the atomicity of the cake-ingestion
>> operation will become apparent.
>>
> Ok course according to Tarski we can cut the cake up so it increases in 
> volume.
> The slices have to be immeasurable, but the final volume can be almost 
> anything.
> I bet that makes cake buffering harder to plan for.
> 
> -paradoxically yrs-
> Robin Becker
> 
Not at all - we just apply the same division techniques to the buffer 
space until we can map the pieces of cake one-to-one onto the buffers.

stick-that-in-your-cakehole-ly y'rs  - steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From pitonero at gmail.com  Sat Apr  9 13:39:48 2005
From: pitonero at gmail.com (El Pitonero)
Date: 9 Apr 2005 10:39:48 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
	<mailman.1596.1113015264.1799.python-list@python.org>
	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>
	<mailman.1607.1113039130.1799.python-list@python.org>
	<1113043759.765568.9920@o13g2000cwo.googlegroups.com>
Message-ID: <1113068388.567089.18950@z14g2000cwz.googlegroups.com>

It may be useful to separate the code into version-independent part and
version-dependent part. Also, one can try to implement the higher-level
logic directly in the class definition of A, B, etc., and then use the
version objects only as patches for the details. That is, one can use
place-holder calls. The place-holder calls do nothing if a feature is
not really implemented (either in a parent class, or in an older
version).

class World(object):

    def __init__(w, version):

        class A(object):
            def ff(): pass # place holder for version-dependent code
            def f(self): # version-independent code
                return self.ff()

        class B(A):
            def gg(): pass
            def g(self):
                return self.gg()

        for cls in (A, B):
            setattr(w, cls.__name__, w.versionize(cls, version))

    def versionize(w, cls, version):
        import inspect
        methods = inspect.getmembers(version, inspect.ismethod)
        methods = [m[1] for m in methods if m[0].split('_')[0] ==
cls.__name__]
        for m in methods:
            m_name = '_'.join(m.__name__.split('_')[1:])
            import new
            im = new.instancemethod(m.im_func, None, cls)
            setattr(cls, m_name, im)
        return cls

class Version1(object):
    def A_ff(self):
        return 'A.ff: version 1'
    def B_gg(self):
        return 'B.gg: version 1'

class Version2(Version1):
    def A_ff(self):
        return 'A.ff: version 2'
    def B_ff(self):
        return 'B.ff: version 2'

w1, w2 = World(Version1), World(Version2)
a1, b1 = w1.A(), w1.B()
a2, b2 = w2.A(), w2.B()

print a1.f() # prints 'A.ff: version 1'
print b1.f() # prints 'A.ff: version 1'
print b1.g() # prints 'B.gg: version 1'
print '------------'
print a2.f() # prints 'A.ff: version 2'
print b2.f() # prints 'B.ff: version 2'
print b2.g() # prints 'B.gg: version 1'



From fphsml at gmail.com  Sun Apr 10 13:51:41 2005
From: fphsml at gmail.com (James)
Date: 10 Apr 2005 10:51:41 -0700
Subject: Document exchange!
Message-ID: <1113155501.394204.92470@o13g2000cwo.googlegroups.com>

This is not so much as a Python question though I will implement it in
it.

I am looking to securely aggregate documents based on a metadata from
multiple providers. I am getting the feeling that I am reinventing the
wheel. If anyone knows similar work elsewhere, please point me to it.

Security and simplicity (is it possible to use the two in the same
sentence? :-) ) of the protocol is king. I have the luxury of
implementing any protocol I choose on each reposity.

Thanks,
James



From fredrik at pythonware.com  Wed Apr  6 07:59:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 6 Apr 2005 13:59:21 +0200
Subject: regexp weirdness (bug?)
References: <1112715308.737856.234580@z14g2000cwz.googlegroups.com><2584344.b1EHUGjtUV@news.perlig.de><mailman.1395.1112720052.1799.python-list@python.org><1186100.a9ONk7P8cn@news.perlig.de>
	<1112781872.088784.129280@g14g2000cwa.googlegroups.com>
Message-ID: <d30iqp$mtm$1@sea.gmane.org>

Sergey Schetinin wrote:

> it's line #159 here, but it did work! thanks. so it IS a bug?

sure looks like one.  please report it here:

    http://sourceforge.net/tracker/?group_id=5470&atid=105470

</F> 





From grig.gheorghiu at gmail.com  Mon Apr  4 19:51:36 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 4 Apr 2005 16:51:36 -0700
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <878y3y6ts4.fsf@pobox.com>
Message-ID: <1112658696.587335.12530@z14g2000cwz.googlegroups.com>

py.test intercepts the assert statements before they are optimized
away. It's part of the profuse "magic" that py.test does.

Grig



From oren at REMOVETHIS1.hishome.net  Sun Apr 17 02:06:10 2005
From: oren at REMOVETHIS1.hishome.net (Oren Tirosh)
Date: 16 Apr 2005 23:06:10 -0700
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <cf052f0d.0504162206.129ccdbd@posting.google.com>

Take a look at Nick Coglan's "with" proposal:

http://groups.google.co.uk/groups?selm=mailman.403.1105274631.22381.python-list%40python.org

It addresses many of the same issues (e.g. easy definition of
properties). It is more general, though: while your proposal only
applies to keyword arguments in a function call this one can be used
to name any part of a complex expression and define it in a suite.

I think that a good hybrid solution would be to combine the "with"
block with optional use of the ellipsis to mean "all names defined in
the with block".

See also the thread resulting from Andrey Tatarinov's original
proposal (using the keyword "where"):

http://groups.google.co.uk/groups?selm=3480qqF46jprlU1%40individual.net


  Oren


From mwm at mired.org  Mon Apr 25 09:51:17 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 08:51:17 -0500
Subject: What's do list comprehensions do that generator expressions 
 don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<426CB5DC.1050301@freemail.gr>
	<mailman.2437.1114424277.1799.python-list@python.org>
	<mailman.2441.1114426201.1799.python-list@python.org>
Message-ID: <86hdhvotgq.fsf@guru.mired.org>

jfj <jfj at freemail.gr> writes:

> I think a better question would be "What do *generator expressions* do
> that list comprehensions don't?".  And always use list comprehensions
> unless you want the extra bit.

As the OP, I can say why I didn't ask those questions.

Generator expressions don't build the entire list in memory before you
have to deal with it. This makes it possible to deal with expressions
that are to long to fit in memory.

Which means that the real rule should be always use generator
expressions, unless you *know* the expression will always fit in
memory.

Which leads to the obvious question of why the exception.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From gsakkis at rutgers.edu  Tue Apr 26 02:31:29 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 23:31:29 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<426dab5c.540679656@news.oz.net>
Message-ID: <1114497089.020512.309660@o13g2000cwo.googlegroups.com>

> I'm not clear on what your real goal is, but if you just want a
snapshot
> of what locals() is just before exiting func, that could be done with
> a byte-code-hacking decorator with usage looking something like
>
>     #func defined before this
>     func_locals = {}
>     @getlocals(func, func_locals)
>     def probefunc(): pass
>
> which would make a probefunc function that would be identical to func
> except that before exiting, it would do func_locals.update(locals()).
> (you might want func_locals to be a list and do
func_locals.append(locals())
> in case func is recursive and you are interested in the all the
locals).

That's all good, at least if I knew how to poke with bytecodes ;-)
What's a good starting point to look at ?

By the way, the original problem was yet another property packager,
which I posted as recipe at the cookbook:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410698.

George



From robbiefcarlton at hotmail.com  Fri Apr 15 08:14:21 2005
From: robbiefcarlton at hotmail.com (robcarlton)
Date: 15 Apr 2005 05:14:21 -0700
Subject: eval function not working how i want it dag namn
Message-ID: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>

hi everybody
I've written this function to make a list of all of an objects
attributes and methods (not for any reason, I'm just learning)

def list_members(obj)
    l = dir(obj)
    return map(lambda x : eval('obj.'+x), l)

but I get an error saying that obj isn't defined. As I understand it
eval has access to the current local namespace, which does contain
object, so I'm not sure whats going wrong.

ps Im sure there are better ways of doing the above which doesn't call
the eval function, and while I'd be glad to know what it is, I'd still
like to understand why my way isnt working

thanks



From exogen at gmail.com  Thu Apr 28 06:21:32 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 28 Apr 2005 06:21:32 -0400
Subject: Which IDE is recommended?
In-Reply-To: <du7k6mnmcrb.fsf@lehtori.cc.tut.fi>
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
	<d4qaqn$59u$2@eeyore.INS.cwru.edu>
	<du7k6mnmcrb.fsf@lehtori.cc.tut.fi>
Message-ID: <d4qdfg$afj$1@eeyore.INS.cwru.edu>

Ville Vainio wrote:
> Perhaps you are just being impatient?
> 
> Also, make sure that Preferences/pydev/code completion has
> "Autocomplete on '.'" box checked.

Yeah, that option is enabled. I actually just discovered that it does
work in the example you give and for other modules in the standard
library. But calls to standard library modules only occur maybe twice in
any of my big scripts... the problem is I've been trying code completion
with third-party modules and local classes, which still doesn't work.

--
Brian Beck
Adventurer of the First Order


From steve at holdenweb.com  Tue Apr 26 06:03:06 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 06:03:06 -0400
Subject: Order of elements in a dict
In-Reply-To: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <d4l3ar$ca8$1@sea.gmane.org>

Marcio Rosa da Silva wrote:
> Hi!
> 
> In dictionaries, unlinke lists, it doesn't matter the order one inserts 
> the contents, elements are stored using its own rules.
> 
> Ex:
> 
>  >>> d = {3: 4, 1: 2}
>  >>> d
> {1: 2, 3: 4}
> 
> So, my question is: if I use keys() and values() it will give me the 
> keys and values in the same order?
> 
> In other words, it is safe to do:
> 
>  >>> dd = dict(zip(d.values(),d.keys()))
> 
> to exchange keys and values on a dictionary? Or I can have the values 
> and keys in a different order and end with something like this:
> 
>  >>> dd
> {2: 3 , 4: 1}
> 
> instead of:
> 
>  >>> dd
> {2: 1, 4: 3}
> 
> For this example it works as I wanted (the second output), but can I 
> trust this?
> 
> Also, if someone has a better way to exchange keys and values in a dict, 
> I would like to learn. :-)
> 
> Thanks!
> 
> Marcio

Well, a footnote to the "Mapping types" page in the Library Reference says

"""Keys and values are listed in an arbitrary order which is non-random, 
varies across Python implementations, and depends on the dictionary's 
history of insertions and deletions. If items(), keys(), values(), 
iteritems(), iterkeys(), and itervalues() are called with no intervening 
modifications to the dictionary, the lists will directly correspond. 
This allows the creation of (value, key) pairs using zip(): "pairs = 
zip(a.values(), a.keys())". The same relationship holds for the 
iterkeys() and itervalues() methods: "pairs = zip(a.itervalues(), 
a.iterkeys())" provides the same value for pairs. Another way to create 
the same list is "pairs = [(v, k) for (k, v) in a.iteritems()]". """

So it looks as though you will be safe, since there's a promise in the 
documentation.

If you just want to iterate over the (key, value) pairs, however, you 
should normally choose items() or iteritems() to do so. Then you could 
use (for example):

dd = dict((x[1], x[0]) for x in d.items())

I presume you are confident that each value will only occur once in the 
original dictionary, as otherwise the result will be smaller than the input.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From ivanlan at pauahtun.org  Mon Apr 25 09:34:13 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Mon, 25 Apr 2005 07:34:13 -0600
Subject: Multiple tuples for one for statement
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
	<200504242020.27440.jstroud@mbi.ucla.edu>
	<200504251356.07715.james@wrong.nu>
Message-ID: <426CF1D5.E9F4396@pauahtun.org>

Hi All--

"R. C. James Harlow" wrote:
> 
> or just:
> 
> for a,b,c in (tup1, tup2, tup3):
>     print a
>     print b
>     print c
> 

And this works in Python version???

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From kay.schluehr at gmx.net  Sat Apr  9 15:00:24 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 9 Apr 2005 12:00:24 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
Message-ID: <1113073224.002152.306200@l41g2000cwc.googlegroups.com>

Hi George,

it's a nice little puzzle and it is more fun to solve it if one is not
a student anymore :)

Filling the gaps in the lattice is somehow necessary but it is not
necessary to create all the classes.

Ansatz:

We can consider two matrices: one is filled with nodes ( class names )
the other is filled with arrows between the nodes representing the
inheritance relationships.

In symbolic notatation:

        | A  B  C |
Nodes = | D  0  F |
        | G  H  I |

         | 0   l    l  |
Arrows = | u   0   u*l |
         | u  u*l  u*l |


Remarks:
1 ) if a node or an arrow is empty a 0 is inserted into the matrix.

2 ) u is for uppermost, l is for leftmost. A multiplication between
    arrows should read as a logical AND: u*l ~ upper AND left.

With this interpretation the above matrizes contains the same
information than the lattice:

A <- B <- C
^    ^    ^
|    |    |
D <- 0 <- F
^    ^    ^
|    |    |
G <- H <- I

Now we need an algorithm to create all the classes from the matrix
information using multiple inheritance when needed:


# arrows symbolized as primes. Only u and l are used in the impl.
# d and r are somewhat more complicated to implement

l = 2
r = 3
u = 5
d = 7

class ClassGridError(Exception):pass

class ClassGrid(object):
    def __init__(self):
       self.class_names = []  # rows of the class-name matrix
       self.arrows      = []  # rows of the arrow matrix
       self.classes     = {}  # store the resulting classes

    def add_names(self,names):
        self.class_names.append(names)

    def add_arrow(self,arrow):
        self.arrows.append(arrow)

    def __repr__(self):
        if self.classes:
            return self.classes.__repr__()
        return object.__repr__(self)

    def create_classes(self):
        for i,class_row in enumerate(self.class_names):
            for j,cls_name in enumerate(class_row):
                if cls_name == 0:
                    continue
                arrow = self.arrows[i][j]
                if arrow == 0:
                   self.classes[cls_name] = type(cls_name,(),{})
                else:
                   bases = []
                   name  = 0
                   if arrow%u == 0:   # search uppermost
                      k = i-1
                      while k>=0:
                         name = self.class_names[k][j]
                         if name:
                            break
                         k-=1
                      if not name:
                         raise ClassGridError,"Wrong arrow matrix"
                      bases.append(self.classes[name])
                   if arrow%l == 0:  # search leftmost
                      k = j-1
                      while k>=0:
                         name = self.class_names[i][k]
                         if name:
                            break
                         k-=1
                      if not name:
                         raise ClassGridError,"Wrong arrow matrix"
                      bases.append(self.classes[name])
                   self.classes[cls_name] =
type(cls_name,tuple(bases),{})

cg = ClassGrid()

cg.add_names(("A","B","C"))
cg.add_names(("D", 0, "F"))
cg.add_names(("G","H","I"))

cg.add_arrow(( 0,  l,   l ))
cg.add_arrow(( u,  0,  u*l))
cg.add_arrow(( u, u*l, u*l))

cg.create_classes()

Now You can checkout Your solution:

>>> cg.classes["A"].__subclasses__()
[<class '__main__.B'>, <class '__main__.D'>]

>>> cg.classes["B"].__subclasses__()
[<class '__main__.C'>, <class '__main__.H'>]

>>> cg.classes["C"].__subclasses__()
[<class '__main__.F'>]

>>> cg.classes["D"].__subclasses__()
[<class '__main__.F'>, <class '__main__.G'>]

>>> cg.classes["F"].__subclasses__()
[<class '__main__.I'>]

>>> cg.classes["G"].__subclasses__()
[<class '__main__.H'>]

>>> cg.classes["H"].__subclasses__()
[<class '__main__.I'>]

>>> cg.classes["I"].__subclasses__()
[]

Ciao,
Kay



From qwweeeit at yahoo.it  Sat Apr 16 10:48:08 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 16 Apr 2005 07:48:08 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
Message-ID: <2ab23d7a.0504160648.2bcbfa9f@posting.google.com>

Hi,

At last I succeded in implementing a cross reference tool!
(with your help and that of other gurus...).
Now I can face the problem (for me...) of understanding your 
code (I have not grasped the classes and objects...).

I give you a brief example of the xref output (taken from your code,
also if the line numbers don't match, because I modified your code,
not beeing interested in eof's other than Linux).

and         076                     if self.lasttoken<=self.spaces and
self.spaces:
append      046             self.lines.append(pos)
append      048         self.lines.append(len(self.raw))
argv        116     if sys.argv[1]:
argv        117         filein = open(sys.argv[1]).read()
__author__  010 __author__ = s_
break       045             if not pos: break
__call__    080     def __call__(self, toktype, toktext, (srow,scol),
.                                        .                            
   (erow,ecol), line):
class       015 class Stripper:
COMMENT     092             if toktype == tokenize.COMMENT:
comments    021     def format(self, out=sys.stdout, comments=0,
spaces=1,untabify=1):
comments    033         self.comments = comments
comments    090         if not self.comments:
comments    118         Stripper(filein).format(out=sys.stdout,
comments=0,                        .                                  
            untabify=1)
__credits__ 008 __credits__ = s_
__date__    011 __date__ =  s_
DEDENT      105         if toktype in [token.INDENT, token.DEDENT]:
def         018     def __init__(self, raw):
def         021     def format(self, out=sys.stdout, comments=0, 
.                              spaces=1,untabify=1):
def         080     def __call__(self, toktype, toktext, (srow,scol),
(erow,ecol), line):
def         114 def Main():
ecol        080     def __call__(self, toktype, toktext, (srow,scol),
.                               (erow,ecol), line):
erow        080     def __call__(self, toktype, toktext, (srow,scol), 
.                                                 (erow,ecol), line):
ex          059         except tokenize.TokenError, ex:
except      059         except tokenize.TokenError, ex:
expandtabs  036            self.raw = self.raw.expandtabs()
filein      117         filein = open(sys.argv[1]).read()
filein      118         Stripper(filein).format(out=sys.stdout,
comments=0,
                                                           
untabify=1)
find        044             pos = self.raw.find(self.lineend, pos) + 1
format      021     def format(self, out=sys.stdout, comments=0, 
                               spaces=1,untabify=1):
format      118         Stripper(filein).format(out=sys.stdout,
comments=0,
                                               untabify=1)
import      005 import keyword, os, sys, traceback
import      006 import StringIO
import      007 import token, tokenize
import      115     import sys
INDENT      105         if toktype in [token.INDENT, token.DEDENT]:
__init__    018     def __init__(self, raw):
isspace     071                 if not line.isspace():
keyword     005 import keyword, os, sys, traceback
lasttoken   030         self.lasttoken = 1
lasttoken   072                     self.lasttoken=0
lasttoken   075                     self.lasttoken+=1
lasttoken   076                     if self.lasttoken<=self.spaces and
                                                       self.spaces:
...

To obtain this output, you must remove comments and empty lines, move
strings in a db file, leaving as place holder s_ for normal strings
and m_ for triple strings.
See an example:
    
m_   """python comment and whitespace stripper :)"""      #016
m_   ''' strip comments, strip extra whitespace, convert EOL's from
Python
                                                  code.'''#023     
m_   ''' Token handler.'''                                #082

s_ 'just another tool that I needed'	|008 __credits__ = 'just another
tool
                                                       that I needed'
s_ '.7'                   |009 __version__ = '.7'
s_ 'M.E.Farmer'           |010 __author__ = 'M.E.Farmer'
s_ 'Jan 15 2005, Oct 24 2004'	|011 __date__ =  'Jan 15 2005, Oct 24
2004'
s_ ' '                    |037         self.raw = self.raw.rstrip()+'
'
s_ '\n'                   |040         self.lineend = '\n'
s_ '__main__'             |122 if __name__ == '__main__':

I think that this tool is very useful.

Bye


From rkern at ucsd.edu  Thu Apr 14 04:15:03 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 14 Apr 2005 01:15:03 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1793.1113334936.1799.python-list@python.org>	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1818.1113375260.1799.python-list@python.org>	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1823.1113383437.1799.python-list@python.org>	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1860.1113432730.1799.python-list@python.org>
	<slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3l8k0$ecf$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
> 
>>Antoon Pardon wrote:

>>>Well if it comes so far I have to consult a lawyer I'd rather not publish
>>>it in the first place.
>>
>>Then take the (free) advice that you asked for. 
> 
> I'll do that and I appreciate your time in giving it.

Gladly given, and I apologize if I sound a bit snippy.

>>And please do read Rosen's book.
> 
> I started already.
> 
>>>The only reason I'm concerned is that this is to be part of a tutorial
>>>and I prefer not to burden those who read the tutoral with any kind of
>>>license. As far as I'm concerned people reading the tutorial can use
>>>any code provided with it in any way they see fit.
>>
>>You can't *quite* go that far if you are deriving code from Python, but 
>>it's about as close as you can get. You still have those light 
>>restrictions about attribution and notification of changes.
> 
> I'm not sure I follow. As far as I understand, I can license the result
> however I see fit, as long as I go by the conditions for using the
> original code. So it seems I can use a license so that the readers
> of the tutorial don't have to be concerned in how they use the code.

You can't take away the requirement to keep the PSF's copyright notice 
on their bits of code. You can give permission for users to do what they 
like with your parts of the code.

However, the requirements of the PSF license are about as trivial as you 
get outside of the public domain.

>>>I see this as my contribution to the communities who has provided me
>>>with all kinds of things that are usefull to me. I'm willing to put
>>>time into this, but if I have to spend money because it is impossible
>>>otherwise to find out how to contribute legally, that is a hurdle
>>>I'm reluctant to take.
>>
>>You could take a look at what other people are doing. Most of us here 
>>are writing and releasing software derived from Python, legally so and 
>>without complication.
> 
> I would do that if I were just writing code I thought others could
> find usefull. I then would feel no problem "burdening" those users
> with the same kind of license I found in the product I took some
> code from. But I also think that readers of documentation should
> be free to use any code included in any way they see fit.

If they have issues with distributing code derived from Python, why are 
they reading a Python tutorial?

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From sidharth.kuruvila at gmail.com  Fri Apr  1 15:36:45 2005
From: sidharth.kuruvila at gmail.com (Sidharth)
Date: 1 Apr 2005 12:36:45 -0800
Subject: how to close a gzip.GzipFile?
In-Reply-To: <mailman.1206.1112387183.1799.python-list@python.org>
References: <200504011154.18640.jguerin@cso.atmel.com>
	<mailman.1206.1112387183.1799.python-list@python.org>
Message-ID: <1112387805.759423.54120@o13g2000cwo.googlegroups.com>

GzipFile has a parameter 'fileobj' which you could use.
GzipFile( [filename[, mode[, compresslevel[, fileobj]]]])

For iteratng over the file
how about :
line =  oldfileobj.readline()
while line !="":
   oldmd5.update(line)
   line = oldfileobj.readline()



From robin at reportlab.com  Mon Apr 25 12:08:18 2005
From: robin at reportlab.com (Robin Becker)
Date: Mon, 25 Apr 2005 17:08:18 +0100
Subject: Python, Perl & PDF files
In-Reply-To: <a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
Message-ID: <426D15F2.7080201@chamonix.reportlab.co.uk>

Dennis Lee Bieber wrote:
.......
> 
> 
> 	The most commonly known phrasing would likely be "God only helps
> those who help themselves".
> 
Of course for politicians and others with troughed snouts it should read "God 
punish those that help themselves", never seems to work out in practice though :(

-guzzling-ly yrs-
Robin Becker



From prasad413in at gmail.com  Mon Apr 18 04:00:25 2005
From: prasad413in at gmail.com (hue)
Date: 18 Apr 2005 01:00:25 -0700
Subject: Parse command line options
Message-ID: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>

I am trying to parse command line options using getopt module.

I have written the following Code

import string

import getopt

def usage():
    print '''haarp_make.py -- uses getopt to recognize options

Options: -n  -- No
         -t  -- Time
         -h  -- help
         -i  -- image_file
         -o  -- Output:filename'''

    sys.exit(1)

def main():


    try:

        opts,args = getopt.getopt(sys.argv[1:], 'n:t:h:i:o:',
["Number=","time=","help=","image_file=","Output Filename="])

    except getopt.GetoptError:
        print 'Unrecognized argument or option'
        usage()
        sys.exit(0)



I have gone through getopt module from the help in python Library, but
i couldnot proceed from here.

My Task is

python  MyScriptName.py  n  t  h  i  o

How to parse those arguments, i is an Image File.
Please try to give some comments.
Hoping for a reply.



From jepler at unpythonic.net  Wed Apr 27 09:34:41 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 27 Apr 2005 08:34:41 -0500
Subject: python equivalent of php implode
In-Reply-To: <8664y8lyb2.fsf@guru.mired.org>
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<mailman.2520.1114531188.1799.python-list@python.org>
	<8664y8lyb2.fsf@guru.mired.org>
Message-ID: <20050427133438.GA24236@unpythonic.net>

On Tue, Apr 26, 2005 at 09:59:29PM -0500, Mike Meyer wrote:
> Jeff Epler <jepler at unpythonic.net> writes:
> 
> >     items = query_param.items()
> >     keys = [item[0] for item in items]
> >     values = [item[1] for item in items]
> 
> Is there some reason not to do:
> 
>    keys = query_params.keys()
>    values = query_params.values()
> 
> That would seem to be a lot more obvious as to what was going on.

I was afraid that .keys() and .values() might not "match up" (so that
the i'th key maps to the i'th value in query_param).  Now that I've
glanced at the documentation, I see that this *is* guaranteed[1], and
I should have written the code you proposed.

Jeff
[1] http://docs.python.org/lib/typesmapping.html note 3
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From richardjones at optushome.com.au  Fri Apr  1 00:42:14 2005
From: richardjones at optushome.com.au (richard)
Date: Fri, 01 Apr 2005 15:42:14 +1000
Subject: 48-hour game programming competition only 14 days away
Message-ID: <424cdf36$0$5397$afc38c87@news.optusnet.com.au>

The 48-Hour Game Programming Competition is a "mostly from scratch", timed,
solo coding challenge where all willing game developers spend their allowed
time making the best game they can under a common theme.

http://www.mechanicalcat.net/tech/ld48/

There have been numerous entries in the past using Python and PyGame or
PyOpenGL. Personally, I'll be using it again.

Come along, it's a hella lot of fun :)


    Richard



From steve at holdenweb.com  Fri Apr  1 01:59:23 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 01 Apr 2005 01:59:23 -0500
Subject: Stylistic question about inheritance
In-Reply-To: <I%Y2e.28660$cg1.19060@bgtnsc04-news.ops.worldnet.att.net>
References: <fgY2e.493073$w62.132731@bgtnsc05-news.ops.worldnet.att.net>	<424C5B09.9090006@v.loewis.de>
	<I%Y2e.28660$cg1.19060@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <d2irdi$psi$1@sea.gmane.org>

Andrew Koenig wrote:
> ""Martin v. L?wis"" <martin at v.loewis.de> wrote in message 
> news:424C5B09.9090006 at v.loewis.de...
> 
> 
>>You would normally try to avoid type queries, and rely on virtual
>>methods instead, if possible.
> 
> 
> Of course.
> 
> 
>>It seems likely for the application
>>that code can be shared across different subclasses, for example,
>>you might be able to define
>>
>>def Expr:
>>  def __str__(self):
>>    return '%s(%s)' % (self.__class__.__name__,
>>                       ", ".join(map(str, self.operands()))
>>
>>requiring you only to implement .operands() in the subclasses.
> 
> 
> Indeed.
> 
> 
>>If you can anticipate such common code, it is easier to add
>>a base class right away. If you cannot think of a specific
>>use case, there is little point in having a common base class.
> 
> 
> So, for example, you don't think it's worth including the base class as a 
> way of indicating future intent?
> 
> 
The obvious XP response to the question is "You aren't going to need 
it". If you already have the intent then basically you appear to be 
saying "I  *am* going to need it".

Since you say that almost as an integral feature of the specification 
I'm not sure I understand why you asked the question in the first place 
- unless it's really an anthropological inquiry.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From mrmaple at gmail.com  Wed Apr 20 13:58:18 2005
From: mrmaple at gmail.com (James Carroll)
Date: Wed, 20 Apr 2005 13:58:18 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <b273c74105042010584b2abafa@mail.gmail.com>

If you have five elements, numbered 0,1,2,3,4  and you ask for the
elements starting with the first one, and so on for the length you
would have [0:length].  So [0:5] gives you elemets 0,1,2,3,4.   Think
of the weirdess if you had to ask for [0:length-1] to get length
elements...

One based 1...  n  are what I call _counting numbers_
Zero based 0...  n-1 are the _indexes_ (offsets) into the collection. 
The first element is at offset 0.

It is a little weired that slicing does [index: count] instead of
[index:index] or [count:count] I agree, but python really does just
flow wonderfully once you see how clean code is that's written [index:
count].

In C++ the STL also has the idea that there's an 'end()' iterator that
is really one element past the end of your container.  It makes things
flow really well there too.  All code interates up to but not
including the last element you specify. always.

-Jim



On 19 Apr 2005 22:58:49 -0700, seberino at spawar.navy.mil
<seberino at spawar.navy.mil> wrote:
> Many people I know ask why Python does slicing the way it does.....
> 
> Can anyone /please/ give me a good defense/justification???
> 
> I'm referring to why mystring[:4] gives me
> elements 0, 1, 2 and 3 but *NOT* mystring[4] (5th element).
> 
> Many people don't like idea that 5th element is not invited.
> 
> (BTW, yes I'm aware of the explanation where slicing
> is shown to involve slices _between_ elements.  This
> doesn't explain why this is *best* way to do it.)
> 
> Chris
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
>


From gdamjan at gmail.com  Mon Apr 11 18:57:05 2005
From: gdamjan at gmail.com (Damjan)
Date: Tue, 12 Apr 2005 00:57:05 +0200
Subject: non-ascii charater image gereration with PIL
References: <d3d08e$ejh$1@news.kreonet.re.kr>
Message-ID: <425b010e_2@x-privat.org>

> PIL has 'text(position, string, options)' method in its ImageDraw module.
> Does this work with unicode or other 2byte encoded string?
> It seems not working on my python2.3.5 with PIL 1.1.5.

Yes, just tried and it works (python-2.4/PIL 1.1.5), but you also need a
font that supports your characters, see this script:

text = unicode('some cyrillic text: ??????', 'utf-8')
from PIL import ImageFont, ImageDraw, Image
image = Image.new('RGB',(400,300))
draw = ImageDraw.Draw(image)
font = ImageFont.truetype(".fonts/dejavu-ttf/DejaVuSans.ttf", 12)
draw.text((10, 10), text, font=font)
image.save('wow.jpg')

-- 
damjan


From mauriceling at acm.org  Sun Apr 17 03:42:30 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 17 Apr 2005 17:42:30 +1000
Subject: new to mac OS10
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>	<d3ojjf$n11$1@geraldo.cc.utexas.edu>	<4261C311.8070502@acm.org>
	<mailman.2012.1113707887.1799.python-list@python.org>
Message-ID: <d3t40r$i2k$1@domitilla.aioe.org>

Robert Kern wrote:

>> 3. Apple-installed Python's command line tools are symlinked from 
>> /usr/bin to /System/Library/Frameworks/Python.framework but the OSX 
>> installer for Python 2.4.1 places the commandline tools in 
>> /usr/local/bin and symlinked to /Library/Frameworks/Python.framework. 
>> So it seems to me that Python 2.4.1 (installed using OSX installer for 
>> Python 2.4.1) is not a precise replacement of Apple-installed Python...
> 
> 
> Bingo. It's not intended to be one.
> 

Hi Robert,

Once I've tried to install Python 2.4.1 through the installer Bob 
Ippolito built. I've already for Fink installed Python 2.3.5 in my 
system. So,

/usr/bin/python -> /sw/bin/python

and the newly installed Python 2.4.1 created /usr/local/bin/python -> 
/Library/Frameworks/Python.framework/python

Does /usr/bin/python takes precedence over /usr/local/bin/python?

Somehow it rings an alarm in me...

Cheers
Maurice


From fredrik at pythonware.com  Fri Apr 22 13:38:03 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 19:38:03 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com><EFj8e.809$E57.495@fe51.usenetserver.com><pan.2005.04.20.10.08.25.97524@gmail.com><f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA><pan.2005.04.22.11.48.13.138980@gmail.com><pan.2005.04.22.13.22.14.591804@gmail.com><mailman.2282.1114177844.1799.python-list@python.org><pan.2005.04.22.13.56.27.343483@gmail.com>
	<pan.2005.04.22.17.25.06.536391@gmail.com>
Message-ID: <d4bcko$95l$1@sea.gmane.org>

Willem Ligtenberg wrote:

> So I get a list database names and two! lists of ID's
> And those two are in no way related. Is there an easy way to create a
> dictionary like this DBname --> ID

why not just check for both alternatives?

    text = elem.findtext("Object-id_str")
    if text is None:
        text = elem.findtext("Object-id_id")

(or you can loop over the child elements and map elem.tag through a
dictionary...)

> If not, I still might need to revert to SAX... :(

you still have to check for both alternatives...

(if you find a parsing problem that you cannot solve with a light-weight
DOM, SAX won't help you...)

</F>



From axel at white-eagle.invalid.uk  Tue Apr 26 03:54:32 2005
From: axel at white-eagle.invalid.uk (Axel)
Date: Tue, 26 Apr 2005 02:54:32 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<pan.2005.04.26.00.01.53.726156@jerf.org>
Message-ID: <fbKdnXMbdo8lbvDfRVn-gw@adelphia.com>

Jeremy Bowers <jerf at jerf.org> wrote:
> Nobody ever changed their mind as a result of a 20-thread endless
> reply-fest. As usual, the posters aren't about to admit anything, and none
> of the bystanders are reading any more.

Well I am reading... always interested to learn.

Axel






From whocaresrmb at yahoo.com  Sat Apr 23 02:29:23 2005
From: whocaresrmb at yahoo.com (Johnny Gentile)
Date: 22 Apr 2005 23:29:23 -0700
Subject: Spamming nut won't go away
In-Reply-To: <lo9i6190r1fv2qlso1edictmvh14fa5frl@4ax.com>
References: <1114186957.814776.238490@z14g2000cwz.googlegroups.com>
	<lo9i6190r1fv2qlso1edictmvh14fa5frl@4ax.com>
Message-ID: <1114237763.730599.164900@l41g2000cwc.googlegroups.com>

There is no God. OK, Ron, discuss.
Ron wrote:
> Reports to groups-abuse at google.com, abuse at aol.net, domains at aol.net,
> abuse at yahoo.com, abuse at yahoo-inc.com
> 
> And do not feed the troll!



From steve at holdenweb.com  Mon Apr 25 06:23:29 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 25 Apr 2005 06:23:29 -0400
Subject: Changing a line in a text file
In-Reply-To: <1114423528.568195.12750@l41g2000cwc.googlegroups.com>
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>	<mailman.2435.1114423084.1799.python-list@python.org>
	<1114423528.568195.12750@l41g2000cwc.googlegroups.com>
Message-ID: <d4ig5d$n0i$1@sea.gmane.org>

kah wrote:
> Hi,
> 
> the example provided by Vishnu is quite close to what I want but it
> still required me to write all the data back to the file.
> 
> Is there any way where I can just write a particular line?
> 
If you are asking whether you can update a file in place, the answer is 
"yes" - look up "lseek" in the Python documentation (module os, under 
"File Descriptor Operations".

However, you asked about replacing one line with another of a different 
length: since this will mean changing the offsets of all subsequent 
bytes you have no way to do this other than writing out the whole 
content of the file following the modification. You would also have to 
ensure that you truncated the file to the correct length.

In general, although they don't make it obvious that they are doing so 
most programs that "change" files (text editors and the like) are really 
writing new copies.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From kay.schluehr at gmx.net  Sun Apr 17 02:43:03 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Apr 2005 23:43:03 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
In-Reply-To: <mailman.2014.1113717992.1799.python-list@python.org>
References: <mailman.2014.1113717992.1799.python-list@python.org>
Message-ID: <1113720183.913168.184770@f14g2000cwb.googlegroups.com>


Robert Brewer wrote:
> Bengt Richter wrote:
> > The '::' unary suite operator should return an ordered dict
> > subtype representing the bindings
>
> Why ordered?

Because You can't otherwise guarantee to feed optional argument
parameters in a correct way.

Example:

x = property(*seq) where:
            seq = (item[1] for item in ::
                def get_x():
                    return self.__x
                def set_x(value):
                    self.__x = value
                del_x = None
                doc   = "I'm the 'x' property." )

This statement would not work if the result of '::' ( considered as an
"ordered dict" ) would return simply a dict because the order of the
input parameters matters.

Ciao,
Kay



From postmaster at castleamber.com  Sat Apr 23 22:51:59 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 02:51:59 GMT
Subject: Python or PHP?
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
	<Xns9641B65EDB2Ccastleamber@130.133.1.4>
	<kEAae.2308$5I5.223369@newshog.newsread.com>
	<WPKdnXeIEOXobPffRVn-iA@comcast.com>
	<hlDae.2062$Cz3.271500@monger.newsread.com>
Message-ID: <Xns9641DE67DC9B9castleamber@130.133.1.4>

Leif K-Brooks wrote:

> Peter Ammon wrote:
>> I'm bewildered why you haven't mentioned magic quotes.  A one line 
>> change to the configuration file can render your PHP site almost 
>> entirely immune to SQL injection attacks.
> 
> PHP's magic quotes is one of the most poorly-designed features I can 
> think of. Instead of magically escaping only strings which will actually 
> be passed to a database (like Python's DB-API does), it escapes every 
> string that comes from the user, meaning that strings which will be sent 
> back to the user have to be manually unescaped.

Yup, I recently downloaded a script that required grc_magic_quotes (IIRC 
the name) to be *off*

I looked it up, and one has to do such a thing in the ini (!!!) file.

> Even worse, since it can be turned on and off, code which is designed 
> for a magic_quotes=on environment will become seriously vulnerable when 
> moved to an environment with magic_quotes on. Security-related features 
> should never be toggleable!

Amen.

And quite some people who nowadays install PHP scripts are the same ones 
who reply to questions like "My messenger program doesn't work" with "Did 
you disable the firewall?".

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


From jbo at cannedham.ee.ed.ac.uk  Mon Apr  4 06:34:02 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Mon, 04 Apr 2005 11:34:02 +0100
Subject: Raise Error in a Module and Try/Except in a different Module
In-Reply-To: <mailman.1283.1112610486.1799.python-list@python.org>
References: <7f285d16.0504040211.1e1b8783@posting.google.com>
	<mailman.1283.1112610486.1799.python-list@python.org>
Message-ID: <d2r563$gmj$1@scotsman.ed.ac.uk>


> 
> You're not *calling* FUNC1 here, you're just assigning a reference to
> it to the name 'a'. Try FUNC1() instead.
> 
Oh yeah.


From RonGrossi382791 at yahoo.com  Fri Apr 22 12:22:37 2005
From: RonGrossi382791 at yahoo.com (RonGrossi382791 at yahoo.com)
Date: 22 Apr 2005 09:22:37 -0700
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_your_?=
	=?iso-8859-1?q?location=2E_I_want_to_ask_you_the_most_important_qu?=
	=?iso-8859-1?q?estion_of_your_life=2E_Your_joy_or_sorrow_for_all_e?=
	=?iso-8859-1?q?ternity_depends_upon_your_answer=2E_The_question_is?=
	=?iso-8859-1?q?=3A_Are_you_saved=3F_It_is_not_a_question_of_how_go?=
	=?iso-8859-1?q?od_you_are=2C_nor_if_you_are_a_church_member=2C_but?=
	=?iso-8859-1?q?_are_you_saved=3F_Are_you_sure_you_will_go_to_Heave?=
	=?iso-8859-1?q?n_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST=B7147?=
Message-ID: <1114186957.814776.238490@z14g2000cwz.googlegroups.com>


The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrongdoing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

Jesus said, "I am the way, the truth and
the life: no one can come to the
Father(God)(in Heaven), but by me."
(John 14:6)

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi

*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!

____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.biblegateway.com


____________________________________________________



From __peter__ at web.de  Tue Apr 19 05:03:08 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 19 Apr 2005 11:03:08 +0200
Subject: Question about python 2.4 documentation
References: <4264b584$0$786$626a14ce@news.free.fr>
Message-ID: <d42hft$l1h$02$1@news.t-online.com>

Fouff wrote:

> I have a small question concerning the functions open(...) and file(...)
> with python 2.4

>> The intent is for open() to continue to be preferred for use as a factory
>> function which returns a new file object.

versus

>> The previous spelling, open(), is retained for compatibility, and is an
>> alias for file().

> what is the favorite function you recommend me to use ?

The former has BDFL blessing. Let Guido speak:

http://mail.python.org/pipermail/python-dev/2004-July/045921.html

Peter


From rkoida at yahoo.com  Wed Apr 20 02:36:20 2005
From: rkoida at yahoo.com (rkoida at yahoo.com)
Date: 19 Apr 2005 23:36:20 -0700
Subject: Refactoring in Python.
In-Reply-To: <mailman.2120.1113930792.1799.python-list@python.org>
References: <8764yiog3y.fsf@hector.domek>
	<mailman.2120.1113930792.1799.python-list@python.org>
Message-ID: <1113978980.824324.88240@l41g2000cwc.googlegroups.com>

Hello



From postmaster at castleamber.com  Sat Apr 23 22:49:26 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 02:49:26 GMT
Subject: Python or PHP?
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
	<Xns9641B65EDB2Ccastleamber@130.133.1.4>
	<kEAae.2308$5I5.223369@newshog.newsread.com>
	<WPKdnXeIEOXobPffRVn-iA@comcast.com>
Message-ID: <Xns9641DDF95E364castleamber@130.133.1.4>

Peter Ammon wrote:

> Leif K-Brooks wrote:
>> John Bokma wrote:
>> 
>>> my $sort = $cgi->param( "sort" );
>>> my $query = "SELECT * FROM table WHERE id=? ORDER BY $sort";
>> 
>> 
>> And the equivalent Python code:
>> 
>> 
>> cursor.execute('SELECT * FROM table WHERE id=%%s ORDER BY %s' % sort,
>> [some_id])
>> 
>> You're right, of course, about being *able* to write code with SQL 
>> injection vulnerabilities in Python. But it's not even close to being
>> as easy as in PHP.
> 
> I'm bewildered why you haven't mentioned magic quotes.  A one line 
> change to the configuration file can render your PHP site almost 
> entirely immune to SQL injection attacks.

There is no almost in security.

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


From tiissa at nonfree.fr  Wed Apr 20 16:26:28 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 22:26:28 +0200
Subject: pyGTK on Mouse over event ?
In-Reply-To: <1114027819.338892.278590@z14g2000cwz.googlegroups.com>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
Message-ID: <4266baf3$0$7208$626a14ce@news.free.fr>

Domenique.Tilleuil at gmail.com wrote:
> if i add a motion_notify or even a butten_press event to an image
> object it does absolutly nothing :s
> 
I have tried coding a simple application in pyGTK and I remember I had 
trouble getting button_press event in a DrawingArea.
I was using glade and despite having declared a handler to this event, I 
had to manually call add_events(gtk.gdk.BUTTON_PRESS_MASK) (the connect 
was ok but the event mask was not).
Have you checked this?


From raghulj at gmail.com  Thu Apr  7 04:54:13 2005
From: raghulj at gmail.com (Raghul)
Date: 7 Apr 2005 01:54:13 -0700
Subject: logging as root using python script
In-Reply-To: <1112852658.339035.185600@g14g2000cwa.googlegroups.com>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
	<1112852658.339035.185600@g14g2000cwa.googlegroups.com>
Message-ID: <1112864053.764844.210950@o13g2000cwo.googlegroups.com>

But this not the right answer



From exarkun at divmod.com  Wed Apr 27 11:53:54 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Wed, 27 Apr 2005 15:53:54 GMT
Subject: compile shebang into pyc file
In-Reply-To: <fb66056705042707372695904d@mail.gmail.com>
Message-ID: <20050427155354.15422.1469236266.divmod.quotient.3740@ohm>

On Wed, 27 Apr 2005 10:37:11 -0400, Michael Soulier <msoulier at gmail.com> wrote:
>On 26 Apr 2005 18:15:51 -0700, johnlichtenstein at gmail.com
><johnlichtenstein at gmail.com> wrote:
>> Is there some reason why you want to run the .pyc file, rather than the
>> .py file? If you start the script with
>
>a. It's more efficient, since the code doesn't need to be compiled
>before it's run.
>b. What if you want to ship closed-source?
>

  I don't think either of these reasons is particularly compelling.  

    To avoid the costs of byte compilation (which are typically pretty minimal), structure your code to have a simple, short main .py file which imports most of its code from other modules.  This gives you the automatic byte compilation caching behavior Python normally uses for imports for the bulk of your code.

    Shipping closed source takes a lot more than just shipping .pyc files.  .pyc files are trivially (or near trivially) converted back into .py files.  The only parts which cannot be restored are the comments, which are discarded at compilation time.

  Jp


From bokr at oz.net  Sat Apr 30 16:50:45 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 30 Apr 2005 20:50:45 GMT
Subject: Micro-PEP: str.translate(None) to mean identity translation
References: <4272e00c.260731842@news.oz.net> <FzHce.2828$Ab.1209@trndny04>
Message-ID: <4273eeb4.330019032@news.oz.net>

On Sat, 30 Apr 2005 08:44:21 GMT, "Raymond Hettinger" <vze4rx4y at verizon.net> wrote:

>[Bengt Richter]
>> Just thought None as the first argument would be both handy and mnemonic,
>> signifying no translation, but allowing easy expression of deleting
>characters,
>> e.g.,
>>
>>    s = s.translate(None, 'badcharshere')
>
>Log a feature request on SF and assignment to me.
>I'll put this in for you.
>
Thanks. It has request ID # 1193128

Regards,
Bengt Richter


From codecraig at gmail.com  Thu Apr 14 16:07:22 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 13:07:22 -0700
Subject: SimpleXMLRPCServer - turn of output
Message-ID: <1113508180.313755.216940@f14g2000cwb.googlegroups.com>

Hi,
  I have a simple script which starts a SimpleXMLRPCServer.  A client
connects to the server and executes one of the servers methods.  When
the server processes the request and returns it, the server prints some
info out to the console, something like this..

localhost - - [14/Apr/2005 15:47:12] "POST /RPC2 HTTP/1.0" 200 -

Any idea how I can prevent it from printing out?

Thanks



From fred.dixon at gmail.com  Fri Apr 15 09:59:52 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 15 Apr 2005 06:59:52 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <Xns963892E01D954duncanrcpcouk@127.0.0.1>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
	<Xns963892E01D954duncanrcpcouk@127.0.0.1>
Message-ID: <1113573592.248241.38550@z14g2000cwz.googlegroups.com>

:) unit test is something on my to-learn list. seems involved and i
haven't seen any straight forward tutorials yet. as yet i still
consider myself a hobbyist  at best.



From rogerb at rogerbinns.com  Sat Apr 23 23:11:21 2005
From: rogerb at rogerbinns.com (Roger Binns)
Date: Sat, 23 Apr 2005 20:11:21 -0700
Subject: GUI woes
References: <mailman.2361.1114307134.1799.python-list@python.org>
Message-ID: <bcfrj2-ua9.ln1@home.rogerbinns.com>

"jeff elkins" <jeffelkins at earthlink.net> wrote in message news:mailman.2361.1114307134.1799.python-list at python.org...
> under debian sid, I installed (via apt-get) the various wxpython stuff
> available.:
>
> libwxgtk2.4-python
> libwxgtk2.5.3-python
> python-opengl
> python-pythoncard
> python2.1-opengl
> python2.2-opengl
> python2.3-opengl
> python2.3-pythoncard
> pythoncard
> pythoncard-doc
> pythoncard-tools
> wx2.5-examples
> wxpython2.5.3
> wxwin2.4-examples

You have a mixture of different versions of wxPython in there.

> AttributeError: MyFrame instance has no attribute 'Bind'

Bind was introduced in wxPython 2.5.  Looks like you are
running against thr 2.4 library.

Roger 




From pitonero at gmail.com  Sat Apr  2 10:22:39 2005
From: pitonero at gmail.com (El Pitonero)
Date: 2 Apr 2005 07:22:39 -0800
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
Message-ID: <1112455359.773729.92080@l41g2000cwc.googlegroups.com>

Ron_Adam wrote:
>
> # (0) Read defined functions into memory
>
> def decorator(d_arg):     # (7) Get 'Goodbye' off stack
>
>     def get_function(function): # (8) Get func object off stack
>
>         def wrapper(f_arg):        # (9) Get 'Hello' off stack
>
>             new_arg = f_arg+'-'+d_arg
>             result = function(new_arg)  # (10) Put new_arg on stack
>                                         # (11) Call func object
>
>             return result          # (14) Return result to wrapper
>
>         return wrapper        # (15) Return result to get_function
>
>     return get_function    # (16) Return result to caller of func
>
>
>
> @decorator('Goodbye')   # (5) Put 'Goodbye' on stack
>                         # (6) Do decorator
>
> def func(s):            # (12) Get new_arg off stack
>
>     return s            # (13) Return s to result
>
> # (1) Done Reading definitions
>
>
> print func('Hello')     # (2) Put 'Hello' on stack
>                         # (3) Put func object on stack
>                         # (4) Do @decorator
>                         # (17) print 'Hello-Goodbye'
>
> # Hello-Goodbye

Is it possible that you mistakenly believe your @decorator() is being
executed at the line "func('Hello')"?

Please add a print statement to your code:

def decorator(d_arg):
     def get_function(function):
         print 'decorator invoked'
         def wrapper(f_arg):
             new_arg = f_arg+'-'+d_arg
             result = function(new_arg)
             return result
         return wrapper
     return get_function

When you run the program, you will see that the comment "decorator
invoked" is printed out at the moment when you finish defining:

@decorator('Goodbye')
def func(s):
    return s

That is, decorator is invoked before you run the line "func('Hello')".

Decorator feature is a metaprogramming feature. Not a programming
feature. By metaprogramming I mean you are taking a function/code
object, and try to do something with it (e.g., wrap it around.) By the
time you finish defining the function "func(s)", the decorator
"get_function()" was already invoked and will never be invoked again.

It's better to view functions as individual objects. And try to think
who holds reference to these objects. If no one holds reference to an
object, it will be garbage collected and will be gone. After you define
the function "func()" and before you execute "func('Hello')", this is
the situation:

decorator() <--- held by the module
get_function() <--- temporary object, garbage collected
wrapper() <--- held by the module, under the name "func"
func() <--- held by wrapper(), under the name "function"

'Goodbye' <--- string object, held by the wrapper function object,
under the name d_arg

Objects can be rebound to different names. In your code you have
rebound the original wrapper() and func() function objects to different
names.

I think the confusing part is that, for function name binding, Python
does not use the = operator, but instead relies on the "def" keyword.
Maybe this is something to be considered for Python 3K. Anonymous
function or codeblock objects are good to have, when you are doing
metaprogramming.



From jepler at unpythonic.net  Sun Apr  3 22:59:48 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 3 Apr 2005 21:59:48 -0500
Subject: Silly question re: 'for i in sys.stdin'?
In-Reply-To: <d2q7ni$h3t$1@sea.gmane.org>
References: <d2q7ni$h3t$1@sea.gmane.org>
Message-ID: <20050404025945.GB7293@unpythonic.net>

The iterator for files is a little bit like this generator function:
    def lines(f):
        while 1:
            chunk = f.readlines(sizehint)
            for line in chunk: yield line
Inside file.readlines, the read from the tty will block until sizehint
bytes have been read or EOF is seen.

If you want this kind of line-at-a-time functionality, then you could
use the iter(callable, sentinel) form, and switch between it and the
readlines method based on a commandline flag or whether the file
satisfies 'os.isatty()':
    def lines(f):  # untested
        """lines(f)
If f is a terminal, then return an iterator that gives a value after
each line is entered.  Otherwise, return the efficient iterator for
files."""
        if hasattr(f, "fileno") and isatty(f.fileno()):
            return iter(f.readline, '')
        return iter(f)

    for line in lines(sys.stdin):
        doSomethingWith(line)

Jeff
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From pajo at pajo.com  Thu Apr 28 09:10:33 2005
From: pajo at pajo.com (Pajo)
Date: Thu, 28 Apr 2005 15:10:33 +0200
Subject: Can .py be complied?
In-Reply-To: <4270defb$1_1@rain.i-cable.com>
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
	<116v84ftiq01ucb@corp.supernews.com>
	<426fb233$1_2@rain.i-cable.com>
	<116vefldolc6p88@corp.supernews.com>
	<4270defb$1_1@rain.i-cable.com>
Message-ID: <d4qnc9$3jk$1@sunce.iskon.hr>

I've just tried to build both console and windows exe and
it works just fine



monkey wrote:
> Thx very much, I got the point now ( ;
> 
> 


From sdementen at hotmail.com  Tue Apr 12 04:57:31 2005
From: sdementen at hotmail.com (Sebastien de Menten)
Date: 12 Apr 2005 01:57:31 -0700
Subject: args attribute of Exception objects
References: <mailman.1526.1112952761.1799.python-list@python.org>
	<pan.2005.04.08.16.07.30.85408@jerf.org>
	<8dad5312.0504110231.68f6a21b@posting.google.com>
	<425ae097.133343848@news.oz.net>
Message-ID: <8dad5312.0504120057.19c60370@posting.google.com>

Thank you guys for those good advices (and the very interesting
example of AST hacking).

However, this was an example of use for Exception.args. It does not
alleviate my concerns about the fact that the args attribute is poorly
designed for standard Exceptions.
It is as if the Exception design was only made for end users (display
of a string in an interpreter) without thinking about original ways to
use them :-)

Seb


From richardblackwood at cloudthunder.com  Sun Apr 24 01:25:06 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 01:25:06 -0400
Subject: Variables
In-Reply-To: <d4f9n1$fah$1@sea.gmane.org>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b0d03_3@newspeer2.tds.net>	<426B1300.6090802@cloudthunder.com>	<d4f4ps$7cu$1@sea.gmane.org>	<426B1A6F.2060401@cloudthunder.com>
	<d4f9n1$fah$1@sea.gmane.org>
Message-ID: <426B2DB2.7080005@cloudthunder.com>

Robert Kern wrote:

> Richard Blackwood wrote:
>
>> Robert Kern wrote:
>
>
>>> If you must, http://en.wikipedia.org/wiki/Variable
>>>
>> Fantastic, wikipedia deals precisely with the difference between 
>> variables in mathematics versus programming. However, he would never 
>> trust a definition from such an "unreputable" source. If you have any 
>> other sources I might direct him to...he maintains that the notion of 
>> foo being a variable where it's value is known (versus unknown) is 
>> illogical.
>
>
> His problem is that he doesn't respect that technical terms can have 
> different meanings in different fields and contexts. No authoritative 
> reference can solve his problem for him. He's being overly pedantic 
> about a field in which *he* is clearly not an authority. You can't 
> convince such people, only ignore them.
>
Unfortunately that's not much of an option for me. We are working on a 
project together so I am forced to either prove his notion incorrect or 
I give in to his conception. *throws hands in air*


From bokr at oz.net  Thu Apr 28 22:52:13 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 29 Apr 2005 02:52:13 GMT
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
	<1114696780.653849.220080@o13g2000cwo.googlegroups.com>
	<1114698836.708809.32780@o13g2000cwo.googlegroups.com>
	<Xns9646A9319F208duncanbooth@127.0.0.1>
	<1114717354.209028.30270@z14g2000cwz.googlegroups.com>
Message-ID: <42719bb9.177704245@news.oz.net>

On 28 Apr 2005 12:42:34 -0700, "runes" <rune.strand at gmail.com> wrote:

>Hi Duncan, sorry, I was unprecise.  I'm thinking of a script, called
>t.py  that can be used in the console  like an ordinary command. Som if
>I change directory from S:\scripts to d:\projects and execute the
>script  the title changes to "projects" etc.
>
>I have that functionality today with a combination of a python script
>and a batch file. I just wondered if I could use python all the way.
>Apparently I cannot.
>
>Here are the scripts:
>
>
>------ DirInPath:\t.bat --------------------------------
>@echo off
>:: reads bare directory name from file
>:: created by external Python script
>set DIR_FILE_NAME=DOS_IS_TERRIBLE.tmp
>PyBareDir.py %DIR_FILE_NAME%
>
>for /F "eol=;" %%t in (%DIR_FILE_NAME%) do (
>	title %%t
>)
>
>del /Q /F DOS_IS_TERRIBLE.tmp
>------------------------------------------------------------
>
>
>------ DirInPath:\PyBareDir.py --------------------------------
># extracts bare directory name and  writes
># it to file with name given as argument.
>
>from os import getcwd
>from os.path import basename
>import sys
>
>try:
>	saveAsName = sys.argv[1]
>	lastDir = basename(getcwd())
>	XWwz(saveAsName, 'w+').write(lastDir + '\n;')
>except:
>	print "PyBareDir failed:", sys.exc_info()[1]
>
>-----------------------------------------------------------------------
>

I think I'd try one of the win32 api packages and see if SetConsoleTitle
would work. I.e., from some old API docs:
----
The SetConsoleTitle function sets the title bar string for the current console window. 

BOOL SetConsoleTitle(

    LPTSTR  lpszTitle 	// address of new title  
   );	
Parameters

lpszTitle

Points to a null-terminated string that contains the string to appear in the title bar of the console window. 

Return Value

If the function succeeds, the return value is TRUE.
If the function fails, the return value is FALSE. To get extended error information, call GetLastError. 

See Also

GetConsoleTitle 
----

Alternatively, you could compile your own extension for
title setting/getting called consoletitle.dll
using the above API (assuming it works) and
its companion GetConsoleTitle.

Regards,
Bengt Richter


From http  Sat Apr  2 18:08:38 2005
From: http (Paul Rubin)
Date: 02 Apr 2005 15:08:38 -0800
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
	<d2mmi8$g9t$1@panix2.panix.com>
	<7xmzsg3ov6.fsf@ruckus.brouhaha.com>
	<mailman.1246.1112482106.1799.python-list@python.org>
Message-ID: <7xmzsgbwuh.fsf@ruckus.brouhaha.com>

Tim Peters <tim.peters at gmail.com> writes:
> If you don't want to exploit it, that's fine:  there was always an
> obvious approach using an explicit mutex here, and the only thing
> stopping you from using it is a desire to be clever.  Exploiting the
> GIL in CPython is clever; using an explicit mutex is utterly
> straightforward.  Pick your poison.

For my immediate requirement I'm going to use xrange as you suggested
(thanks!).  It will work exactly as I want.  I'd be uncomfortable
publishing such a program for long-term use by other people, but this
is just for a short-term hack (famous last words).

I think using an explicit mutex goes against Guido's quote mentioned
yesterday, about avoiding tedious code.  But relying on the GIL
results in a brittle program that only works correctly in one Python
implementation.  As use of other implementations becomes more
widespread, one of three things has to happen: 1) Python programs will
become uglier and more mistake-prone (from using explicit mutexes all
over the place); 2) Python programs will become unreliable (from
depending on a GIL that doesn't exist any more); or 3) Python will
acquire some new mechanisms for handling reliable synchronization
easily and cleanly, as other languages already have.

I think (3) is the preferable choice and it's reasonable to try to
figure out how such mechanisms should work.


From claudio.grondi at freenet.de  Mon Apr 11 09:32:39 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 11 Apr 2005 13:32:39 -0000
Subject: IPython - problem with using US international keyboard input scheme
	on W2K
Message-ID: <3bv5mgF6jbil9U1@individual.net>

German Windows 2000, SP 4
Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)]
IPython 0.6.10 -- An enhanced Interactive Python.

Is it already known, that after switching
the keyboard input scheme on German
Windows 2000 to english USA International
IPython generates \x00" instead of "
when trying to input quotation marks?

Idle works still OK under same conditions,

so I suppose, that this is because IPyhon
catches the keyboard input before
the appropriate driver processes
the raw keypresses - e.g. the key
combination AltGr-s (i.e. Ctrl-Alt-s)
which should generate a German
&szlig; i.e. ?  doesn't work in
IPython at all.

Claudio




From vincent at visualtrans.de  Thu Apr 14 01:00:12 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Thu, 14 Apr 2005 07:00:12 +0200
Subject: String manipulation
References: <Pine.LNX.4.44.0504132237250.11173-100000@feynman.ece.ualberta.ca>
Message-ID: <d3ktct$h5m$1@news2.zwoll1.ov.home.nl>

"Nicholas Graham" <nsgraham at ece.ualberta.ca> schrieb im Newsbeitrag 
news:Pine.LNX.4.44.0504132237250.11173-100000 at feynman.ece.ualberta.ca...
|
| I'm writing a program that requires some string manipulations.  Let's say
| I have a string
|
| s='x'
|
| Now, the ascii code for 'x' is 0x78.  I want to be able to perform
| operations on this number, and print the character corresponding to the
| results of the operation.  For example, the pseudo-code looks like:
|
| -read in string s from external file (for simplicity, we'll keep s='x')
|
| -determine the code for s (should be 0x78 or 120 in base 10), store it in
| variable c
|
| -add a literal to c (let's say c=c+1)
|
| -find out which character corresponds to the new code c=0x79
|
| -store the character in a new string s2
|
| At the end of this, I want s2='y'
|
| Any suggestions?

Take a look at the built-in functions ord() and chr() -- Chapter 2.1 of the 
manual.

>> s = 'x'
>> c = ord(s)
>> c
120
>> c+=1
>> s2 = chr(c)
>> s2
'y'

--

Vincent Wehren

|
| NG
| 




From roman.yakovenko at gmail.com  Thu Apr 14 00:30:27 2005
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Thu, 14 Apr 2005 06:30:27 +0200
Subject: Freezing python application
In-Reply-To: <7465b61705041321255cebadc4@mail.gmail.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
	<see-414FAA.23143013042005@news.frontiernet.net>
	<7465b61705041321255cebadc4@mail.gmail.com>
Message-ID: <7465b61705041321302535b26c@mail.gmail.com>

Sorry for previous post - hit the wrong button

Hi. I would like to freeze python application on linux. There are a
few tools that make the job to be done:
    freeze ( comes with python )
    cx_Freeze
    Gordon McMillan's installer

I have one problem with all of them: they require python to be
installed on target machine.
May be I missed something or did not understand right the docs? Also
if I am right could you point me to "freeze" tool that doesn't require
python installed on customer computer?

For windows I have py2exe. What should I use for linux to get same affect?

Thanks

Roman


From dthierbach at usenet.arcornews.de  Sat Apr  9 04:21:28 2005
From: dthierbach at usenet.arcornews.de (Dirk Thierbach)
Date: Sat, 9 Apr 2005 10:21:28 +0200
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
Message-ID: <20050409082128.A3E.0.NOFFLE@dthierbach.news.arcor.de>

George Sakkis <gsakkis at rutgers.edu> wrote:

> 1. There is a (single inheritance) hierarchy of domain classes, say
> A<-B<-..<-Z (arrows point to the parent in the inheritance tree).
> 2. This hierarchy evolved over time to different versions for each
> class. So for example, version's 1 hierarchy would be A_v1 <-B_v1
> <-..<-Z_v1.
> 3. At runtime, only one version is selected by a factory function.

> Up to this point, the inheritance graph would be the following:
> 
> A <- A_V1 ... <- A_Vn
> ^     ^           ^
> |     |           |
> B <- B_V1 ... <- B_Vn
> .     .           .
> .     .           .
> .     .           .
> ^     ^           ^
> |     |           |
> Z <- Z_V1 ... <- Z_Vn

Interesting problem.

> This could be implemented either with multiple inheritance (e.g.
> B_V1(B,A_V1)) 

To help myself thinking about that, let's make a somewhat complicated
example, somewhere in the middle of the graph, with the possibility of
introducing a hole at B3. I also shorten A_Vn to An etc. Consider the
subgraph (with nonstandard annotations of method definition after the bar
(to save space) as explained below):

    A2 | f   <-   A3 | f
    ^             ^    
    |             |    
    B2       <-   B3   
    ^             ^    
    |             |    
    C2 | g   <-   C3 | h

Assume a method g that is present in C2 but not changed in C3. Now g
calls a method f, which is inherited unchanged in C2 from A2 (and not
changed in B2, B3 or C3, either), but changed in A3. Finally, let h
call g in C3. As here the "inheritance columns" have "priority", one
would expect then g to call f in A3, and not in A2, for example.

So what you need is that every method, even if not originating from
the "real" class, is looked up first in the column above the "real"
class, then in the column left to that, and so on.

Ok. Multiple inheritance can often select priority for conflicting
methods. If you can specify yhat tou want "column priority" for
each class, you're fine.

> or using the bridge design pattern |Z| times, one per each row.

When I read your description above, I also thought immediately
"bridge pattern", but then I tried to write down details,
and got stuck. How would you do it?

> Now the problem is that there are 'holes' in this
> inheritance lattice: Not all versions introduced new variations of
> all types; [...]

> My first thought was to create all the missing classes dynamically,
> but it's somewhat obscure and it may not be that simple. Is there a
> more elegant solution, either a general design pattern or some
> clever python metaprogramming hack ?

In the most general case, you need to access time the whole "upper
left" subgraph at class creation, collect all methods defined in this
subgraph with "column priority", and overwrite or add to that any
methods defined in the newly defined class.

I don't know enough about the intricacies of Python's class creation
to make a concrete suggestion, but I'd think that would be possible
with the help of __metaclass__. You would need some sort of
repository for the complete inheritance. One way to do that would
be to create the chain A ... Z first, letting A inherit from some
special class with __metaclass__ set, and then store an array
of all versions somewhere inside the class namespace.

You'd also need some special syntax to create a new version of a class
(say, again inheriting from some special class with __metaclass__
set).  You could set the version inside the class definition, and then
let the __metaclass__ routine disable the normal inheritance
mechanism, and add missing methods as appropriate.

This could for example look like

class A(Versioning):
  ...

class B(A):
  ...

class C(B):
  def h ...
  ...

class A2(NewVersion,A):
  __version__ = 2
  def f(): ...

class B2(NewVersion,B):
  __version__ = 2

class C2(NewVersion,C): 
  __version__ = 2
  def g(): ... f() ...

class A3(NewVersion,A):
  __version__ = 3
  def f(): ...

class C3(NewVersion,C): 
  __version__ = 3
  def h(): ... g() ...

with a hole at B3, as in the example. C3 will get g from C2 and f from
A3, and hence the call chain will work correctly. Also, C3 will have no
base classes (or maybe only the __metaclass__ ones), the inherited
class A, B, C are just used by the class creation process to find
out where to look for the inheritance matrix.

Others who know more about the class creation mechanism will no doubt
improve this suggestion, point out my errors, and tell you how to
implement it :-) Note that you're basically completely changing the
normal inheritance mechanism, and the class objects will be larger,
because they'll have to copy all the necessary methods.

I cannot think of any pattern that would give similar flexibility.

- Dirk

  


From tom at cs.otago.ac.nz  Mon Apr  4 21:59:24 2005
From: tom at cs.otago.ac.nz (Tom Eastman)
Date: Tue, 05 Apr 2005 13:59:24 +1200
Subject: Silly question re: 'for i in sys.stdin'?
References: <d2q7ni$h3t$1@sea.gmane.org> <20050404025945.GB7293@unpythonic.net>
Message-ID: <d2sraa$mkc$1@sea.gmane.org>

Jeff Epler wrote:
> The iterator for files is a little bit like this generator function:
> <SNIP>

Cool thanks for that, it looks like iter(f.readline, '') is the best
solution for the job.

        Tom




From steven.bethard at gmail.com  Sat Apr 23 18:13:40 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 23 Apr 2005 16:13:40 -0600
Subject: func_code vs. string problem
In-Reply-To: <d4eg15$rm8$1@nemesis.news.tpi.pl>
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
	<04mdnXLeedaPLvffRVn-vQ@comcast.com>
	<d4eg15$rm8$1@nemesis.news.tpi.pl>
Message-ID: <-OedncKowsANVfffRVn-tg@comcast.com>

Filip Dreger wrote:
> Uzytkownik "Steven Bethard" <steven.bethard at gmail.com> napisal w 
> wiadomosci news:04mdnXLeedaPLvffRVn-vQ at comcast.com...
> 
>>See the documentation:
>>
>>http://docs.python.org/ref/dynamic-features.html
>>
>>"""The eval(), execfile(), and input() functions and the exec 
>>statement do not have access to the full environment for resolving 
>>names. Names may be resolved in the local and global namespaces of 
>>the caller. Free variables are not resolved in the nearest enclosing 
>>namespace, but in the global namespace."""
> 
> Thank you! I feel silly I have not found the piece of instruction 
> myself. And even worse, as I still do not understand: if exec() 
> resolves free bariable names in the global namespace, how come it 
> works well with code in a string? Or with a code in a compiled string?

Well, probably the best thing to do is to check out what byte-code is 
generated in each case:

py> s = compile('print b', 'string', 'exec')
py> def f():
...     print b
...
py> import dis
py> dis.dis(s)
   1           0 LOAD_NAME                0 (b)
               3 PRINT_ITEM
               4 PRINT_NEWLINE
               5 LOAD_CONST               0 (None)
               8 RETURN_VALUE
py> dis.dis(f)
   2           0 LOAD_GLOBAL              0 (b)
               3 PRINT_ITEM
               4 PRINT_NEWLINE
               5 LOAD_CONST               0 (None)
               8 RETURN_VALUE

So, the code is basically identical, except that with the string, the 
code uses LOAD_NAME, while with the function, the code uses LOAD_GLOBAL. 
  Note that this is because Python can tell that b is not defined in the 
function, and so it assumes that is must be a global lookup.  Look what 
happens if I give f a parameter:

py> def f(b):
...     print b
...
py> dis.dis(f)
   2           0 LOAD_FAST                0 (b)
               3 PRINT_ITEM
               4 PRINT_NEWLINE
               5 LOAD_CONST               0 (None)
               8 RETURN_VALUE

Now f is using LOAD_FAST, which looks at the locals.  I believe the 
point of LOAD_GLOBAL and LOAD_FAST (instead of always using LOAD_NAME) 
is to increase performance in the common case, where exec is not used.

Seems like the documentation is being a little conservative -- it does 
look like some statements will do the lookup in the locals too...  If I 
was more confident about what goes on here, I'd probably try to file a 
documentation bug...

> The manual says I can pass two dictionaries to exec, one for global 
> namespace and one for local. But, strange as it seems, I could not get 
> it to work. In the example I gave, changing exec f.func_code to exec 
> f.func_code in globals(),locals() does not help a bit.

That's because, as the dis.dis output above shows, the function you've 
defined is only searching the global namespace.  So the locals() dict 
you pass won't ever be looked at.

[snip example using locals as globals]
> 
> I thought about that... I don't know why, but it seems wrong. Maybe 
> the updating dictionaries is not very expensive, but there must be 
> some better way. This code has a 'workaround - fixme' written all over 
> it.

Yeah, I agree.  On the other hand, whenever I see exec, it has 
'workaround - fixme' written all over it too. ;)

STeVe


From ajw140NO at SPAMyork.ac.uk  Tue Apr 19 07:47:23 2005
From: ajw140NO at SPAMyork.ac.uk (Andrew Wilkinson)
Date: Tue, 19 Apr 2005 12:47:23 +0100
Subject: Wrapping C++ Class Heirachy in Python
References: <d419gb$r67$1@pump1.york.ac.uk>
	<mailman.2068.1113866328.1799.python-list@python.org>
Message-ID: <d42r49$a22$1@pump1.york.ac.uk>

Steve Juranich wrote:
>> I've found the tp_base and tp_bases elements and I've set them to the
>> base type object (and a tuple containing the base type object) before I
>> call PyType_Ready but in Python the base class isn't recognised. Is there
>> anything obvious I'm missing?
> 
> Well, I can't really recommend without seeing what you did (did you
> remember the preceding "&" for the type struct?

I realised it will be a little difficult to help without seeing my source,
but I was hoping someone would point me to some documentation so I wouldn't
have to cut my source down to an example suitable for a usenet post.
?
> Otherwise, I'd have to recommend Objects/unicodeobject.c in the Python
> source as a reference for how to do this.

Thanks! I was trying to think of a built in object hierarchy in Python, I
didn't think of unicode strings.

Cheers!

Andrew

Simple distributed computing with Python...
PyLinda - http://www-users.cs.york.ac.uk/~aw/pylinda


From rune.strand at gmail.com  Thu Apr 28 10:33:56 2005
From: rune.strand at gmail.com (runes)
Date: 28 Apr 2005 07:33:56 -0700
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
	<1114696780.653849.220080@o13g2000cwo.googlegroups.com>
Message-ID: <1114698836.708809.32780@o13g2000cwo.googlegroups.com>

Hi Jay. It seems like my requirement is a light edition of your. I like
having many console windows open, and to make it easier to switch
between them, I like to name them.  Todays solution is rather tedious

- a batch file that calls a python script that isolates the directory
name and stores it in temp file the batch file reads and use as
argument in the title command.

It works fine, but I dislike the combination and the entire concept of
having to create a temporary file for such a small task. The "batch
language" is probably the most terrible scripting environment ever
created ;-)



From bokr at oz.net  Fri Apr  1 18:52:53 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 01 Apr 2005 23:52:53 GMT
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <kLg3e.203$7b.56@trndny02>
	<424dc33c.55623752@news.oz.net> <esk3e.1612$4b.185@trndny09>
Message-ID: <424dda51.61532058@news.oz.net>

On Fri, 01 Apr 2005 23:04:42 GMT, "Raymond Hettinger" <vze4rx4y at verizon.net> wrote:

>[Bengt Richter]
>> I wonder if a dict with a general override hook for hashing all keys would be
>useful.
>> E.g.,  a dict.__keyhash__ that would take key as arg and default as now
>returning key.__hash__()
>> but that you could override. Seems like this could potentially be more
>efficient than key wrappers,
>> and would also make it so you wouldn't have to chase all the affected methods
>in doing an idict
>> like the above (e.g., get, setdefault, update etc. etc.)
>
>There has also been a discussion of adding a seqdict that maintains a keys in
>insertion order.  Another idea was to have a defaultdict that could be
>instructed to create values as necessary (either zero for counting or [] for
>list building).  Putting the three ideas together, perhaps we should write an
>extension module with a custom dictionary type with methods/attributes
>implementing those ideas.  Essentially, the thought is to put all the bells and
>whistles in one place.  If the extension became popular, it could ultimately
>wend its way into the collections module.
>
>A facetious naming idea would be to call it TrickyDict, a relative to DictMixin
>and no relation to a former U.S. president ;-)
>
>t = TrickyDict()
>t.keytransform(str.lower)
>t['abC'] = 1                  # case insensitive dictionary
>assert t['Abc'] == 1
 assert t.keys() == ['abC']    # actual keys unchanged (but transformed for hash and cmp)
[...]
>
>Taken together, these six attributes/methods could cover many wished for
>features for the 10% of the cases where a regular dictionary doesn't provide the
>best solution.
You think as much as 10% ?

Regards,
Bengt Richter


From fuzzyman at gmail.com  Mon Apr 25 04:34:25 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Apr 2005 01:34:25 -0700
Subject: bytecode non-backcompatibility
In-Reply-To: <d4frsf$ku$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org>
Message-ID: <1114418065.581779.52480@l41g2000cwc.googlegroups.com>


Maurice LING wrote:
> Hi,
>
> I've been using Python for about 2 years now, for my honours project
and
> now my postgrad project. I must say that I am loving it more and more

> now. From my knowledge, Python bytecodes are not back-compatible. I
must
> say that my technical background isn't strong enough but is there any

> good reason for not being back-compatible in bytecodes?
>

It *shouldn't* be a problem for pure python modules. The interpreter
will recognise that the bytecode has the wrong 'magic number' and
recompile.

Seeing as a new major version of python will probably be installed in a
new directory at the very least you will have to copy the modules
across. If they have install files (or a setup.py) wouldn't it be
better to use that *anyway* ?

> My problem is not about pure python modules or libraries but the
problem
> is with 3rd party libraries with C bindings (not python pure). It
means
> that with every upgrade of python, I have to reinstall all my 3rd
party
> libraries which can be quite a bit of work...
>

It is a nuisance. It's more of a nuisance when third part modules with
'c' components are compiled for the new version of python (a windows
specific problem).

I did find that the last upgrade forced me to evaluate which extensions
I actually used. The answer was 'a few less than I thought'. It became
a good opportunity to spring clean my 'site-packages' folder.

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python

> I do hope this problem will be sorted out some day.
> 
> Cheers
> Maurice



From Domenique.Tilleuil at gmail.com  Wed Apr 20 17:31:33 2005
From: Domenique.Tilleuil at gmail.com (Domenique.Tilleuil at gmail.com)
Date: 20 Apr 2005 14:31:33 -0700
Subject: pyGTK on Mouse over event ?
In-Reply-To: <4266c798$0$18013$636a15ce@news.free.fr>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
	<4266baf3$0$7208$626a14ce@news.free.fr>
	<1114029300.082094.293410@g14g2000cwa.googlegroups.com>
	<4266c798$0$18013$636a15ce@news.free.fr>
Message-ID: <1114032693.816847.193380@z14g2000cwz.googlegroups.com>

no problem i'll just keep using the eventbox but is there an event wich
is triggert when the mouse moves over the eventbox ?



From notsew-reversePreceedingAndRemoveThis at canncentral.org  Tue Apr 19 03:18:26 2005
From: notsew-reversePreceedingAndRemoveThis at canncentral.org (weston)
Date: 19 Apr 2005 00:18:26 -0700
Subject: Trouble Installing TTX/FontTools (asks for .NET Framework
	Packages)
In-Reply-To: <1113874162.678930.249700@g14g2000cwa.googlegroups.com>
References: <1113874162.678930.249700@g14g2000cwa.googlegroups.com>
Message-ID: <1113895106.385196.310650@g14g2000cwa.googlegroups.com>

This problem may be addressed here:

http://sourceforge.net/mailarchive/message.php?msg_id=1702374

Apparently setup.py tries to compile a c file, which of course doesn't
work if there's no compiler.



From pgmoscatt at optushome.com.au  Mon Apr  4 02:51:15 2005
From: pgmoscatt at optushome.com.au (Pete Moscatt)
Date: Mon, 04 Apr 2005 16:51:15 +1000
Subject: Makeing TopLevel Modal ?
Message-ID: <4250e32a$0$5821$9a6e19ea@news.newshosting.com>

Hi all,

I want to make a dialog (using Tk Toplevel) but need it to be modal.  Is
this possible using Tk ?

Show below is an example how I am calling the custom dialog:

class main:     
        def __init__(self,parent):
                
                top = self.top = Toplevel(parent)
                top.title("Server Settings")
                top.minsize(width=230,height=270)
                top.maxsize(width=230,height=270)                       





Pete



From fredrik at pythonware.com  Thu Apr 21 11:35:02 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 17:35:02 +0200
Subject: A smallish Tkinter question
References: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
Message-ID: <d48guo$ipo$1@sea.gmane.org>

Mediocre Person wrote:

> What I want: A little window to open with a 0 in it. Every second, the
> 0 should increment by 1.
> What I get: A one second delay, see the window with a 1 in it, and then
> nothing appears to happen. Never see the 0, never see a 2.  Any quick
> clues? Thanks. Nick. (Python 2.4, Win98).

simple solution:

    def run(self): #also tried self,parent
        sleep(1.0)
        self.time = self.time + 1
        self.display["text"] = str(self.time)
        self.update() # make sure to process all outstanding events

smarter solution:

    def run(self):
        self.display["text"] = str(self.time)
        self.time = self.time + 1
        self.after(1000, self.run)
        # no need to use update in this case

even smarter solution:

    import time

    TICK = 1.0 # time between updates, in seconds

    def run(self):
        self.display["text"] = str(self.time)
        self.time = self.time + 1
        delay = TICK - (time.time() % TICK)
        self.after(int(delay*1000), self.run)
        # no need to use update in this case

also see:

    http://tkinter.unpythonic.net/wiki/TkinterDiscuss

</F>



From stewart.midwinter at gmail.com  Tue Apr 26 18:18:21 2005
From: stewart.midwinter at gmail.com (Stewart Midwinter)
Date: Tue, 26 Apr 2005 16:18:21 -0600
Subject: App suggestion please: blog / forum software in Python
Message-ID: <d4c0d480050426151856a6895d@mail.gmail.com>

I'm starting up a new website for a small community of local sports
enthusiasts.  I want to be able to create pages of information easily
(i.e. a content management system), but also allow for discussion on
multiple topics (i.e. a forum). Numerous people should be able to log
in and create or update content, under the guidance of an admin
naturally.

Call me perverse, but I don't want to use phpBB for the forum.  I'm
not seeing anything available in Python though - except for Karrigell.
is that the only option, or am I missing something?

For the blog / CMS portion, I'm looking for something lightweight,
i.e. not Plone or Zope. I've looked at them before and they're total
overkill outside of an enterprise.Have any other suggestions?

I'm using CherryPy for a web application I'm building; it occurs to me
it could be used to build a discussion forum, but maybe someone's
already done that?

I currently use mySQL with CherryPy, but I'll add another db if necessary.

cheers,
-- 
Stewart Midwinter
stewart at midwinter.ca
stewart.midwinter at gmail.com
Skype: midtoad


From simon.brunning at gmail.com  Fri Apr 15 09:19:14 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 15 Apr 2005 14:19:14 +0100
Subject: Determine ip address
In-Reply-To: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
References: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
Message-ID: <8c7f10c605041506198edc8de@mail.gmail.com>

On 15 Apr 2005 06:03:06 -0700, codecraig <codecraig at gmail.com> wrote:
> hi,
>    how can i use python to figure the ip address of the machine which
> the python script is running on?  I dont mean like 127.0.0.1....but i
> want the external IP address (such as ipconfig on windows displays).

On Windows, this works:

socket.gethostbyname(socket.gethostname())

Is that OK on real operating systems too?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From kay.schluehr at gmx.net  Fri Apr  1 00:11:06 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 31 Mar 2005 21:11:06 -0800
Subject: assignments - want a PEP
In-Reply-To: <424c9401.194965575@news.oz.net>
References: <1112309280.565299.314250@f14g2000cwb.googlegroups.com>
	<424c9401.194965575@news.oz.net>
Message-ID: <1112332266.368605.255330@g14g2000cwa.googlegroups.com>


Bengt Richter wrote:
> you can do what you like, pretty much. I.e.,
>
>     cas = CAS()
>     cas.a        # like your plain a, where you said "that's it"
>
>
>     cas.a, cas.b = cas.Expr(), cas.Expr()
>     (cas.a + cas.b)/cas.c
>
> Etc.

Hmmm... feels like a good idea if extended to use properties as special
constructors:

>>> expr = CAS(Expr)
>>> expr.a
a
>>> type(expr.a)
<type 'Expr'>

>>> expr.a+expr.b
a+b

or a bit shorter if Expr becomes the "master algebra":

>>> _ = CAS(Expr)
>>> _.a + _.b
a+b

Regarding that an object oriented CAS will mix an arbitray number of
algebras/namespaces that use algebraic operators homogenously
referencing namespaces is a reasonable for providing clarity.

A helpfull suggestion. Thanks Bengt!

Regards,
Kay


Regards,
Kay



From rajarshi at presidency.com  Mon Apr 18 10:20:35 2005
From: rajarshi at presidency.com (Rajarshi Guha)
Date: Mon, 18 Apr 2005 10:20:35 -0400
Subject: accesing pages (or ranges of pages) via Reportlab
Message-ID: <pan.2005.04.18.14.20.35.385426@presidency.com>

Hi, I've been using pdflatex to dump ranges of pages from a PDF file via
Python. However, I was looking at the Reportlab toolkit and was wondering
if this operation would be possible using this toolkit as well.

Admittedly, I have'nt read the documentation in detail, but I was
wondering if anybody could provide any pointers to extracting pages from a
PDF via Python without using pdflatex

Thanks,
Rajarshi



From mynews44 at yahoo.com  Mon Apr 25 23:46:13 2005
From: mynews44 at yahoo.com (googleboy)
Date: 25 Apr 2005 20:46:13 -0700
Subject: what is the best way to determine system OS?
In-Reply-To: <86y8b6o8pw.fsf@guru.mired.org>
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org> <hpivj2-lh1.ln1@lairds.us>
	<86y8b6o8pw.fsf@guru.mired.org>
Message-ID: <1114487173.272526.13670@o13g2000cwo.googlegroups.com>

Thanks for the edifying responses.  I will try out these things and
figure out if I have enough to solve my problem.

What this script does is use take the output of vmstat to report idle
cpu cycles (or memory stuff, etc.) over a period specified by a
parameter,  all the better to be a plugin for a monitoring service.

Basically it parses the output of the command,  runs through a whole
bunch of regex to discard everything not required and then reports the
info.  Everything I had checked out that responded "Linux" to a uname
command had identical output for vmstat until FC3.   FC3 seems to use
similar output to BSD.   I wrote a simple if-then loop to try to
determine which regex function to use, but it obivously isn't working
under fc3.

I could post the script if you'd like to look at it, but I was a little
bit afraid of looking like a total newbie.  I don't get an excuse to
write code very often so it is probably quite lame.

B)


I will have a look at platform and see what I can come up with.
Delving into libraries seems a little bit much for my current level
(though lots of fun).

Thanks for the responses!

googleboy



From enleverlesO.OmcO at OmclaveauO.com  Mon Apr 11 16:37:34 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Mon, 11 Apr 2005 22:37:34 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<425ad806$0$3146$8fcfb975@news.wanadoo.fr>
Message-ID: <425b61d6$0$19351$8fcfb975@news.wanadoo.fr>

And, also, with  dotNET-framework





From fredrik at pythonware.com  Sun Apr 24 03:22:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 09:22:21 +0200
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org>	<IFEpEp.7Gz@bath.ac.uk><mailman.2346.1114273424.1799.python-list@python.org><zhzae.2305$5I5.222813@newshog.newsread.com>
	<3d04e3F6pjhi5U1@individual.net>
Message-ID: <d4fh5k$rmv$1@sea.gmane.org>

Leif Biberg Kristensen wrote:

> So. I've been writing SQL queries in Python like this, using PostgreSQL
> and psycopg:
>
> cursor.execute("select * from foo where bar=%s" % baz)
>
> Is that wrong, and how should I have been supposed to know that this is
> bad syntax?

do you get paid to write security sensitive applications?  if so, you should
know why that is bad, and what to do instead.

> No doc I have seen actually has told me so.

well, the DB-API specification spends enough time talking about para-
meters for you to figure out that maybe, just maybe, you should learn what
they are.

</F>





From harlinseritt at yahoo.com  Fri Apr  1 06:36:38 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 1 Apr 2005 03:36:38 -0800
Subject: Combining digit in a list to make an integer
In-Reply-To: <1112355049.196021.182720@g14g2000cwa.googlegroups.com>
References: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>
	<1112355049.196021.182720@g14g2000cwa.googlegroups.com>
Message-ID: <1112355398.158653.109790@g14g2000cwa.googlegroups.com>

If anyone has time, would you mind explaining the code that Dan Bishop
was so kind as to point out to me:

int(''.join(num1))

This worked perfectly for me, however, I'm not sure that I understand
it very well. 

Thanks,

Harlin Seritt



From spencermah at comcast.net  Thu Apr 28 13:17:38 2005
From: spencermah at comcast.net (Michael Spencer)
Date: Thu, 28 Apr 2005 10:17:38 -0700
Subject: split question
In-Reply-To: <1114707749.969274.293560@l41g2000cwc.googlegroups.com>
References: <1114707749.969274.293560@l41g2000cwc.googlegroups.com>
Message-ID: <3sudncKb35gWh-zfRVn-vA@comcast.com>

alexk wrote:
> I've a simple question. Why the following:
> 
> words = "123#@$#$@^%[wordA] wordB#@$".split('~`!@#$%^&*()_+-=[]{},./')
> 
> doesn't work? The length of the result vector is 1.
> 
> I'm using ActivePython 2.4
> 
> Alex
> 
Do you mean, why doesn't it split on every character in '~`!@#$%^&*()_+-=[]{},./' ?

Help on built-in function split:

split(...)
     S.split([sep [,maxsplit]]) -> list of strings

     Return a list of the words in the string S, using sep as the
     delimiter string.  If maxsplit is given, at most maxsplit
     splits are done. If sep is not specified or is None, any
     whitespace string is a separator.

sep as a whole is the delimeter string

If you want to split on any of the characters in your sep string, use a regexp:
Perhaps:
  >>> import re
  >>> splitter = re.compile("[\[\]~`!@#$%^&*()_+-= ]+") #note escapes for []
  >>> splitter.split("123#@$#$@^%[wordA] wordB#@$")
  ['', 'wordA', 'wordB', '']
  >>>

is closer to what you had in mind

Michael


From neuhauser+python-list#python.org at sigpipe.cz  Thu Apr 14 11:14:58 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Thu, 14 Apr 2005 17:14:58 +0200
Subject: A little request about spam
In-Reply-To: <425E86E0.1F4207AE@pauahtun.org>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<425E7CB8.85DD2BA4@pauahtun.org>
	<20050414143640.GA94191@isis.sigpipe.cz>
	<425E86E0.1F4207AE@pauahtun.org>
Message-ID: <20050414151458.GA94555@isis.sigpipe.cz>

# ivanlan at pauahtun.org / 2005-04-14 09:06:08 -0600:
> Roman Neuhauser wrote:
> > 
> > # ivanlan at pauahtun.org / 2005-04-14 08:22:48 -0600:
> > > The listowner could turn on the [PYTHON] headers.
> > 
> >     I hope they don't.
> > 
> 
> What's your reasoning?

    It's 9 characters ("[PYTHON] ") of screen real estate wasted.
    Of course it's mail from the python-list, it has the appropriate
    List-Id header!
 
> > > As it stands now, it's too easy to decide incorrectly that
> > > "Subject: Inelegant" is a spamdunk.
> > 
> >     Don't base your decisions (only) on subject then. Oh, and spam sent
> >     through the list would have the [PYTHON] space eater too, so what
> >     would it buy you?
> 
> Of course I wouldn't base decisions _only_ on whether or not [PYTHON]
> appears in the subject.  But I ordinarily do base decisions on the whole
> subject line, and I think that's perfectly reasonable.  There's nothing
> else to go on without opening the message, and for HTML-based mail
> there's no surer way to let spammers know they've found a live email
> addres than to open it.  You know that.

    I have no problem opening HTML emails: I (intentionally) don't have
    a viewer for them configured in mutt which means I see their source.
    And I delete them all without reading.

    For Content-Type: multipart/alternative emails, the text/plain part
    is displayed, and I mostly don't even get to notice there's a html
    part. If the text/plain part says something hilarious, like "This
    is a MIME email, get a better email client" which I've seen in a spam,
    I get to laugh as well.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From mauriceling at acm.org  Sat Apr  9 10:29:19 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 10 Apr 2005 00:29:19 +1000
Subject: PPC OSX vs. x86 Linux
References: <mailman.1617.1113050311.1799.python-list@python.org>
Message-ID: <d38os3$59i$1@domitilla.aioe.org>

Sells, Fred wrote:
> I'm no expert on internals, but I seem to recall that in the past, the
> string module could be implemented in either C or Python and I think there
> is a strop module that is related to all this.  Could it be that on the Mac,
> your string processing is using interpreted Python byte code while linux
> uses c?
> 

I have a suspicion towards Apple-installed Python, although this 
suspicion may be groundless. I've heard that OSX actually uses the 
installed Python for some of its work. Once I've deleted the 
Apple-installed Python totally and it does screw up some of my 
applications, like I can't click on a doc file and let it fire up 
OpenOffice to open the doc file. At the same time, I'm not sure of the 
Apple-installed Python is the same as if you had installed it from Fink, 
or has it been tweaked...

If Apple-installed Python is a problem for you, you might want to 
install a version of Python using Fink and see how it compares up...

Maurice


From Shermanfnx at aeroservicios.com  Wed Apr 20 04:40:10 2005
From: Shermanfnx at aeroservicios.com (Elbert Delaney)
Date: Wed, 20 Apr 2005 03:40:10 -0500
Subject: long time we haven't spoken ;)
References: Shermanfnx@aeroservicios.com
Message-ID: <20020702003042.A707@execpc.com>

Daayuum bro

You'll never guess what happened to me last week.

Basically found a 18 + date site that doesn't charge anything.

So many couples, guys and girls are there messaging and meeting eachother.

And I'm certain there is someone (or more than one) for you.

Although most of them want one-nighters, there are also those who like it serious.

Whatever you feel like pretty much ;-)


http://www.fernirr.com/a5/




PS:no.more?
http://www.fernirr.com/rmv/


From news at NOwillmcguganSPAM.com  Tue Apr 12 05:30:10 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Tue, 12 Apr 2005 10:30:10 +0100
Subject: World First Cancer Immune Booster
In-Reply-To: <425b5ebf$1$10822$afc38c87@news.optusnet.com.au>
References: <425b5ebf$1$10822$afc38c87@news.optusnet.com.au>
Message-ID: <425b9523$0$2589$da0feed9@news.zen.co.uk>

Health wrote:
> Most people with Cancer or AIDS have no immune system left.
> 
> We've developed a world first "natural immune booster" which helps
> people fight their disease.
> 
> Our totally natural product comes from the fresh Arctic Ocean.
> 
> www.protecura.com

Spam rarely offends me, but this is really low. Scamming money out of 
people with potentially fatal illnesses. I hope there's a level of hell 
devoted to spammers like this!


Will McGugan

-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From flupke at nonexistingdomain.com  Thu Apr 21 17:22:42 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Thu, 21 Apr 2005 21:22:42 GMT
Subject: __del__ and reference count problem
In-Reply-To: <1114116099.446355.13610@z14g2000cwz.googlegroups.com>
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>
	<1114107504.036833.109360@z14g2000cwz.googlegroups.com>
	<4267f1e0$0$8871$636a15ce@news.free.fr>
	<1114116099.446355.13610@z14g2000cwz.googlegroups.com>
Message-ID: <CQU9e.70716$3u1.4806758@phobos.telenet-ops.be>

ajikoe at gmail.com wrote:
> look at this discussion:
> http://www.dbforums.com/archive/index.php/t-1100372.html
> 
> it looks like we have to use other way, hold the data we want to
> preseve in an object, because it is possible the class is removed
> before the instance cleaned, and we can not expect __del__ 100% in
> handling finalizing process.
> 
> Pujo
> 

That forum helped. I changed this in my code and it worked
def __del__(self):
     self.__class__.refcount -= 1
     if (self.__class__.refcount == 0):
         print "Last table standing"
     else:
         print "There is/are still %d table(s) left." % 
self.__class__.refcount

Output:
table <__main__.Table instance at 0x009D5B98>
refcount = 1
table <__main__.Table instance at 0x009D5BC0>
refcount = 2
Supplier returned from a 1: not implemented
Supplier returned from b 2: not implemented
There are 2 tables active.
There are 2 tables active.
There is/are still 1 table(s) left.
Last table standing

Seems to work allright !

Thanks ! :)
Benedict


From kent37 at tds.net  Sat Apr 23 12:16:23 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 23 Apr 2005 12:16:23 -0400
Subject: XML parsing per record
In-Reply-To: <pan.2005.04.22.17.25.06.536391@gmail.com>
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
	<pan.2005.04.22.13.22.14.591804@gmail.com>
	<mailman.2282.1114177844.1799.python-list@python.org>
	<pan.2005.04.22.13.56.27.343483@gmail.com>
	<pan.2005.04.22.17.25.06.536391@gmail.com>
Message-ID: <426a7086$1_1@newspeer2.tds.net>

Willem Ligtenberg wrote:
> Is there an easy way, to couple data together. Because I have discoverd an
> irritating feature in the xml file.
> Sometimes this is a database reference:
> <Dbtag>
> 	<Dbtag_db>UCSC</Dbtag_db>
> 	<Dbtag_tag>
> 		<Object-id>
> 			<Object-id_str>1234</Object-id_str>
> 		</Object-id>
> 	</Dbtag_tag>
> </Dbtag>
> 
> And sometimes:
> 
> <Dbtag>
> 	<Dbtag_db>UCSC</Dbtag_db>
> 	<Dbtag_tag>
> 		<Object-id>
> 			<Object-id_id>1234</Object-id_id>
> 		</Object-id>
> 	</Dbtag_tag>
> </Dbtag>
> 
> So I get a list database names and two! lists of ID's
> And those two are in no way related. Is there an easy way to create a
> dictionary like this DBname --> ID
> If not, I still might need to revert to SAX... :(

None of your requirements sound particularly difficult to implement. If you would post a complete 
example of the data you want to parse and the data you would like to end up it would be easier to 
help you. The sample data you posted originally does not have many of the fields you want to extract 
and your example of what you want to end up with is not too clear either.

If you are having trouble with ElementTree I expect you will be completely lost with SAX, 
ElementTree is much easier to work with and cElementTree is very fast.

Kent


From joeyjwc at gmail.com  Tue Apr  5 05:45:25 2005
From: joeyjwc at gmail.com (Joey C.)
Date: 5 Apr 2005 02:45:25 -0700
Subject: Super Newbie Question
In-Reply-To: <3be704F6gh9p1U1@individual.net>
References: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
	<3be704F6gh9p1U1@individual.net>
Message-ID: <1112694325.360762.53260@z14g2000cwz.googlegroups.com>

To reply to many of your messages (I'm using Google right now due to
lack of a better newsreader at the moment), the issue with the
temporary file is that when I write something new to it, if the old
contents of the file was larger, not all of it will be overwritten.
So, the truncate() method will work very well.  Thank you Mr.
Neuhauser, Mr. Ewing, and all others.



From look.at.signature at somewhere  Fri Apr  8 10:31:58 2005
From: look.at.signature at somewhere (Ruud de Jong)
Date: Fri, 08 Apr 2005 16:31:58 +0200
Subject: Interpreter problem
In-Reply-To: <mailman.1530.1112966396.1799.python-list@python.org>
References: <mailman.1530.1112966396.1799.python-list@python.org>
Message-ID: <425695dc$0$44108$5fc3050@dreader2.news.tiscali.nl>

Greg Lindstrom schreef:
> I am using python 2.3.5 on a Linux system and have an odd problem 
> dealing with the 'sha-bang' line.  I have a file, driver.py which starts 
> with
> 
> #!/usr/bin/python
> 
> and works fine (that is, when I type in ./driver.py at the command 
> prompt the file runs as expected).  I have another file, myotherfile.py 
> which starts with the exact same line (#!/usr/bin/python) but I get
> 
> : bad interpreter: No such file or directory
> 
I remember encountering a similar problem once. It turned out that
the python interpreter, when invoked through the #! line, will only work 
properly if the line ends in a Unix newline (only a LF: '\n'). When you 
create the line on a Windows or Mac platform the line ending will 
typically be different: CR/LF (\r\n) for Windows, CR (\r) for Mac. For 
the body of the python script this doesn't matter, but it does matter 
for the #! line.
Not sure if this applies here, but who knows.

Good luck, Ruud
-- 
Ruud de Jong

'@'.join('.'.join(s) for s in (['ruud','de','jong'],['tiscali','nl']))


From jason.massey at gmail.com  Tue Apr  5 10:39:26 2005
From: jason.massey at gmail.com (jason.massey at gmail.com)
Date: 5 Apr 2005 07:39:26 -0700
Subject: Python & MySQL
Message-ID: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>

Hi all,

I've got a weird problem.  I was running Python 2.3 and MySQLdb and had
everything running fine.

Cutting to the chase: After upgrading to 2.4 (and latest modules) the
MySQLdb functions in Python can connect to the database, do queries and
do inserts.

Or rather, it seems to do inserts.  If I just run in the Python command
line and manually connect to the database and do an insert and then a
query on what I just inserted the info is there.

However when I use SQLyog to look at the database the info isn't there.
 When I close down Python, restart, reconnect and query the info isn't
there.

Info inserted from SQLyog is persistant.

Has anyone had any problems like this before? 

thanks,

jason



From kay.schluehr at gmx.net  Sun Apr 10 16:37:22 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Apr 2005 13:37:22 -0700
Subject: Behavioural identity - a short discussion
Message-ID: <1113165441.978711.64860@z14g2000cwz.googlegroups.com>

In mathematics two functions can be considered equal when they
represent the same function graph. This is nothing but a
set-theoretical identity. It is a nice criterion in theory bad a bad
one in practice because it is impossible to calculate all values of an
arbitrary function and this is true not only in practice but also in
theory. So mathematicians start to distinguish certain classes of
functions e.q. polynomials or power-series and prove identity theorems
about objects in those classes.

But what can be said about the equality of two arbitrary
Python-functions f and g? First of all not very much. If we define the
trivial functions

def f():pass
def g():pass

and we ask for equality the hash values will be compared and show us
that f and g are different.

On the other hand if we disassemble f and g we receive a completely
different picture:

>>> dis.dis(f)
  1           0 LOAD_CONST               0 (None)
              3 RETURN_VALUE

>>> dis.dis(g)
  1           0 LOAD_CONST               0 (None)
              3 RETURN_VALUE

This remains true if we add arguments to f:

def f(x):pass

>>> dis.dis(f)
  1           0 LOAD_CONST               0 (None)
              3 RETURN_VALUE

Inspecting a function using dis.dis() enables us to speak about it's
"behavioural idenity".

What is it good for? Answer: for using implementations as interfaces.

Let's consider following classes:

class NotImplemented(Exception):
    pass

class A(object):
    def __init__(self):
        raise NotImplemented

We can regard class A as a "pure abstract" class. It is impossible to
create instances of A. Each subclass of A that wants to be instantiated
must override __init__. This is clearly a property of A. But a client
object that inspects A by checking the availability of methods and
scanning argument signatures will remain insensitive to this simple
fact. Thinking in Python makes live easier because we can not only
check interfaces superficially but we can inspect the code and we can
compare two code-objects on the behavioural level with a certain
accuracy.

We start with a function

def not_implemented():
    raise NotImplemented

and we are not interested in the name or in the argument-signature that
remains empty but in the implementation of not_implemented() as being
prototypical for other functions.

A variant of the dis.disassemble() function ( see [1]) deliveres:

['LOAD_GLOBAL', 'NotImplemented', 'RAISE_VARARGS', 'LOAD_CONST', None,
'RETURN_VALUE']

Analyzing A.__init__ will create exactly the same token stream. A
client object that compares the token streams of __init__ and
not_implemented holds a sufficient criterion for the abstractness of A.



[1] Implementation of a stripped down variant of the dis.disassemble()
function:

def distrace(co):
    "trace a code object"
    code = co.co_code
    n = len(code)
    i = 0
    extended_arg = 0
    free = None
    while i < n:
        c = code[i]
        op = ord(c)
        yield opname[op]
        i = i+1
        if op >= HAVE_ARGUMENT:
            oparg = ord(code[i]) + ord(code[i+1])*256 + extended_arg
            extended_arg = 0
            i = i+2
            if op == EXTENDED_ARG:
                extended_arg = oparg*65536L
            if op in hasconst:
                yield co.co_consts[oparg]
            elif op in hasname:
                yield co.co_names[oparg]
            elif op in hasjrel:
                yield (i,oparg)
            elif op in haslocal:
                yield co.co_varnames[oparg]
            elif op in hascompare:
                yield cmp_op[oparg]
            elif op in hasfree:
                if free is None:
                    free = co.co_cellvars + co.co_freevars
                yield free[oparg]


>>> list(distrace(A.__init__.func_code))
['LOAD_GLOBAL', 'NotImplemented', 'RAISE_VARARGS', 'LOAD_CONST', None,
'RETURN_VALUE']


Ciao,
Kay



From gandalf at geochemsource.com  Thu Apr  7 05:27:34 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 11:27:34 +0200
Subject: client-client connection using socket
In-Reply-To: <1112859364.203394.34100@g14g2000cwa.googlegroups.com>
References: <1112859364.203394.34100@g14g2000cwa.googlegroups.com>
Message-ID: <4254FD06.6090107@geochemsource.com>

ajikoe at gmail.com wrote:

>Hello,
>
>I have two client computers, each has its own host name.
>  
>
  Hello,

I did not understand your problem. I do not see cleary what you want to do?

When you say "client", do you mean a client in a client-server architecture?
Maybe you want to create a peer-to-peer connection -- that is not the same.

>  #Server program. Could we use client hostname here ?
>  
>
Of course you can use the client's hostname. But for what purpose?

>    print "connected from:",addr
>  
>
You can do a reverse DNS lookup here to get the hostname of the client.

>
>  #Client program
>  
>
Ok, it seems to me that you have one client and one server. Am I wrong?
Do you want to create a connection socket between the two clients?
Is it your problem?


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From sjmachin at lexicon.net  Fri Apr  8 09:48:27 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 08 Apr 2005 23:48:27 +1000
Subject: Positions of regexp groups
References: <slrnd5d153.7ht.mlh@selje.idi.ntnu.no>
Message-ID: <vm2d51tnq58mc8b5sprft1q3rur4d32acr@4ax.com>

On Fri, 8 Apr 2005 13:18:27 +0000 (UTC), mlh at selje.idi.ntnu.no (Magnus
Lie Hetland) wrote:

>Just a quick question: Does anyone have a simple way of finding the
>positions (start, end) of the groups in a regexp match? AFAICS, the re
>API can only return the contents...?

These documented methods of the match object aren't simple enough???
"""
start( [group]) 
end( [group]) 

Return the indices of the start and end of the substring matched by
group
"""


and there's span() which returns a tuple (start, end) ... what simpler
could you ask for, Mr Occam?




From codecraig at gmail.com  Thu Apr 21 22:19:43 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 19:19:43 -0700
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <d49gns$cv6$1@baldur.whoi.edu>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<mailman.2257.1114123310.1799.python-list@python.org>
	<d49gns$cv6$1@baldur.whoi.edu>
Message-ID: <1114136383.310295.306150@l41g2000cwc.googlegroups.com>

Thanks for the input.  I was just looking for some feedback about which
was better and faster, if an answer exists.  However, I am not choosing
Perl or Python b/c of it's RegEx engine as someone mentioned.  The
question was just because I was curious, sorry if I misled you to think
I was choosing which language to program with based on the RegEx
performance.  Also, I was not choosing based on performance...I just
wanted to know how they compared.



From rkern at ucsd.edu  Mon Apr 18 22:02:36 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 18 Apr 2005 19:02:36 -0700
Subject: Can't compile with --enable-shared on MacOSX
In-Reply-To: <6ee58e07.0504181752.c83afcf@posting.google.com>
References: <6ee58e07.0504180620.4b157ebf@posting.google.com>	<4263d20e$0$149$e4fe514c@news.xs4all.nl>
	<6ee58e07.0504181752.c83afcf@posting.google.com>
Message-ID: <d41ok7$dcr$1@sea.gmane.org>

Lothar Scholz wrote:
> Maarten Sneep <iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid> wrote in message news:<4263d20e$0$149$e4fe514c at news.xs4all.nl>...
> 
> 
>>On Mac OS X the shared library functionality is obtained through 
>>frameworks. It may detect this by default, but I'm not sure about 
> 
> 
> Not good. I don't want frameworks. I must embedd python into my
> application.
> Setting up a framework and installing/maintaining it is much more work
> especially when i'm already doing my own maintainance for the
> Linux/Windows port.
> 
> No ther way then stealing the dylib from the framework directory ?

Umm, the framework gets embedded into the app bundle when you build it. 
I think you do want frameworks.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From bj_666 at gmx.net  Wed Apr  6 17:11:57 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 06 Apr 2005 23:11:57 +0200
Subject: Overwrite just one line? Am I a n00b or is this impossible?
	Both? :D
References: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.04.06.21.11.56.363271@gmx.net>

In <1112821286.411004.225400 at f14g2000cwb.googlegroups.com>, Matt at revera
wrote:

> I'd like to overwrite just one line of a binary file, based on a
> position set by seek().  Is there no way to do this? As far as I can
> tell I need to read the whole file, change the line, and write it all
> back out.  Not exactly easy on the memory, but I see no other solution.
> 
> so far:
> 
> 	patchme.seek(offset)
> 	patchme.write(a2b_hex(edit)) # the data is in hex first
> 	patchme.close
> 	print "Patching complete"
> 
> This writes the data at the given offset, but _everything_ before it is
> filled with 0's.

Are you sure that you haven't opened the file with the wrong mode? ::

  In [69]: f = open('test.dat', 'w')

  In [70]: f.seek(1000)

  In [71]: f.write('hello')

  In [72]: f.close()

  In [73]: f = open('test.dat')

  In [74]: a = f.read()

  In [75]: f.close()

  In [76]: a
  Out[76]:
  '\x00\x00\x00\x00\x00\x00\x00\00<...>hello

If you want to open an existing file without overwriting it you have to
use mode "w+" or "a".

Ciao,
	Marc 'BlackJack' Rintsch


From ivanlan at pauahtun.org  Sat Apr 30 10:44:55 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Sat, 30 Apr 2005 08:44:55 -0600
Subject: Fwd: how to find the drive in python/cygwin?
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
	<3511dc7505042617524edd244a@mail.gmail.com>
	<426EE4B8.6910F6DD@pauahtun.org>
	<20050430132423.GA2824@tishler.net>
	<4273883C.B25B19B0@pauahtun.org>
	<20050430143928.GB2824@tishler.net>
Message-ID: <427399E7.49228F17@pauahtun.org>

Hi All--

Jason Tishler wrote:
> 
> Ivan,
> 
> It depends on your needs.  If you are looking for a more Unix-like
> Python, then the Cygwin version would probably be better.  If
> Windows-like, then the native Windows version would probably be better.
> 
> The OP seem to be interested in a Cygwin Python solution -- not a
> Windows one.  So, I was just clarifying that the win32api module is not
> supported under Cygwin Python.
> 

Could you clarify?  I always thought that the only thing really
different were the default path assumptions--/ instead of \, and so
on--rather than anything substantive.  I try to use os.path.sep() and
os.path.join(), etc.

What else could bite me?  ;-)

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From sjmachin at lexicon.net  Wed Apr 13 21:05:17 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 14 Apr 2005 11:05:17 +1000
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
Message-ID: <16gr511c2ckc5q4crj5o0tfloicfpne4mt@4ax.com>

On Wed, 13 Apr 2005 08:28:29 -0400, Roy Smith <roy at panix.com> wrote:

>In article <1113390479.738210.49530 at z14g2000cwz.googlegroups.com>,
> "Dan Bishop" <danb_83 at yahoo.com> wrote:
>
>> But there's no reason other than tradition why you should arrange them
>> into groups of 10.
>
>Well, it is traditional for people to have 10 fingers :-)

According to anthropology archives, there was once a tribe called
"OS/360 system programmers" who would cut off their thumbs and great
toes in order that they might better count in hexadecimal.





From skip at pobox.com  Tue Apr 19 00:04:14 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 18 Apr 2005 23:04:14 -0500
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <d41t79$ojs$1@sea.gmane.org>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
	<16996.30734.778261.632448@montanaro.dyndns.org>
	<d41t79$ojs$1@sea.gmane.org>
Message-ID: <16996.33598.348086.859328@montanaro.dyndns.org>


    Skip> But appears to be firefox-specific.

    Michael> Works for me with both Firefox and IE6 under WinXP

The wikalong.org thing is firefox-specific.  You trimmed too much from my
reply.

Skip


From hello at spamm.er  Sun Apr  3 01:39:01 2005
From: hello at spamm.er (alex goldman)
Date: Sat, 02 Apr 2005 22:39:01 -0800
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<87is3663cn.fsf@wilson.rwth-aachen.de>
	<3b99ncF6fd2apU1@individual.net>
Message-ID: <6638350.99U9CtKfoi@yahoo.com>

Artie Gold wrote:

> Torsten Bronger wrote:
>> Hall?chen!
>> 
>> Daniel Silva <dsilva at ccs.neu.edu> writes:
>> 
>> 
>>>Shriram Krishnamurthi has just announced the following elsewhere; it
>>>might be of interest to c.l.s, c.l.f, and c.l.p:
>>>http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html
>>>
>>>
>>>                The Fate Of LAMBDA in PLT Scheme v300
>>>                                 or
>>>                  Lambda the Ultimate Design Flaw
>>>
>>>About 30 years ago, Scheme had FILTER and MAP courtesy of Lisp
>>>hackers who missed them from their past experience.  To this
>>>collection, Scheme added a lexically-scoped, properly-functioning
>>>LAMBDA.  But, despite of the PR value of anything with Guy
>>>Steele's name associated with it, we think these features should
>>>be cut from PLT Scheme v300.
>>>
>>>[...]
>> 
>> 
>> The whole text seems to be a variant of
>> <http://www.artima.com/weblogs/viewpost.jsp?thread=98196>.
>> 
>> Tsch?,
>> Torsten.
>> 
> Ya think? ;-)
> 
> --ag
> 

Wow, the original is much funnier than the "joke"! (Because it's meant
seriously)


"plus the lambda is slower than the list comprehension" - ROTFL!


From jtr at ofb.net  Wed Apr 20 21:06:49 2005
From: jtr at ofb.net (John Reese)
Date: Thu, 21 Apr 2005 01:06:49 +0000 (UTC)
Subject: memory profiler?
Message-ID: <slrnd6dv59.j93.jtr@ofb.net>

Good afternoon, ha ha ha!

Is there a memory or heap profiler for python programs?  So that, for
example, if a program was bloating over time I could see how many of
each object there were and maybe even where the references were?


From postmaster at castleamber.com  Sat Apr 23 18:04:48 2005
From: postmaster at castleamber.com (John Bokma)
Date: 23 Apr 2005 22:04:48 GMT
Subject: Python or PHP?
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
Message-ID: <Xns9641ADB7FB268castleamber@130.133.1.4>

Leif K-Brooks wrote:

> Mage wrote:
>> However one of the worst cases is the sql injection attack. And sql
>> injections must be handled neither by php nor by python but by the
>> programmer.
> 
> But Python's DB-API (the standard way to connect to an SQL database
> from Python) makes escaping SQL strings automatic. You can do this:
> 
> cursor.execute('UPDATE foo SET bar=%s WHERE id=%s', ["foo'bar", 123])
> 
> And "foo'bar" will be implicitly escaped to whatever is appropriate
> for your database. How's that for Python handling SQL injection
> automatically?

Not. Perl and Java use similar methods where one can specify place holders, 
and pass on the data unescaped. But still injection is possible. Moreover, 
a programmer still has to check if the values are acceptable or not.

AFAIK PHP is not able to do this, but goes at great length to "protect" 
newbie programmers at great length, and hence give them a false feeling of 
security. Defensive programming or a defensive programming language is 
wrong.

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


From mwakabayashi at gmail.com  Wed Apr 20 05:42:50 2005
From: mwakabayashi at gmail.com (Mike)
Date: 20 Apr 2005 02:42:50 -0700
Subject: Writing to stdout and a log file
In-Reply-To: <d44v94$k3d$1@ork-un.noris.net>
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
	<d44v94$k3d$1@ork-un.noris.net>
Message-ID: <1113990170.781940.201270@f14g2000cwb.googlegroups.com>

flushing stdout has no effect.

I've got an implementation that does not subclass file. It's not as
nice but it works.



From news2 at mystrobl.de  Sat Apr 30 15:25:46 2005
From: news2 at mystrobl.de (Wolfgang Strobl)
Date: Sat, 30 Apr 2005 21:25:46 +0200
Subject: [Py Windows] User Directory Path
References: <IKGdnQt3ufCXWe7fRVnyuQ@scarlet.biz>
Message-ID: <csm771t19vdrpph3flpe7ihqdnjcd3gm2q@4ax.com>

"Zoool" <polykrom(at)belcenter(dot)com>:

>Is there a way to know the main directory path of a user session?
>I mean the "C:\Documents and Settings\username" Directory of the user logged 
>into a windows session.

>>> from win32com.shell.shell import SHGetSpecialFolderPath
>>> from win32com.shell.shellcon import CSIDL_PROFILE
>>> SHGetSpecialFolderPath(0,shellcon.CSIDL_PROFILE)
u'C:\\Dokumente und Einstellungen\\wolfgang'


-- 
Wir danken f?r die Beachtung aller Sicherheitsbestimmungen


From fraca7 at free.fr  Mon Apr 18 14:35:12 2005
From: fraca7 at free.fr (Fraca7)
Date: Mon, 18 Apr 2005 20:35:12 +0200
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.04.18.18.35.12.343452@free.fr>

On Fri, 15 Apr 2005 16:40:05 -0700, lucio.torre at gmail.com wrote:

> Hello,

> While talking with Facundo while in a PyAr meeting (python-argentina,
> http://www.python.org/ar ) he told me that there is some interest in
> this platform.

You bet there is. i almost bought a Pocket PC instead of my Cli? TH55
because I thought Python would be available sooner on it...

> So, ive made an initial release that has no documentation on how to use
> it or compile it (it requires codewarrior). If there is any interest on
> this, please let me know so we can work on getting this as a real port.

I'm a beginner at PalmOS programming (actually, I've read a book about it,
and that's it) but I'd be glad to help...



From fredrik at pythonware.com  Sat Apr  9 06:10:35 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 9 Apr 2005 12:10:35 +0200
Subject: change the date string into timestamp
References: <20050409095116.4371.qmail@web8409.mail.in.yahoo.com>
Message-ID: <d389gv$8e8$1@sea.gmane.org>

"praba kar" wrote:

> In Php strtotime() will change a date
> string into timestamp.  I want to know which
> python function will  change a date string
> into timestamp.

you might save yourself (and everyone else) some time by looking for
things in the documentation before you post...

> Time stamp means datestring will converted as seconds
>
> example is below
>
> Fri, 8 Apr 2005 09:22:14 +0900 this date value
>
> time stamp is 1112962934

the quickest way to convert a time value to a string is to use the time.ctime()
function:

>>> x = 1112962934
>>> time.ctime(x)
'Fri Apr 08 14:22:14 2005'

to specify a non-standard format, use a format string with the time.strftime
function (or the corresponding datetime functions).  an example:

>>> x = 1112962934
>>> time.strftime("%Y%m%d %H%M%S", time.localtime(x))
'20050408 142214'

see the "time" and "datetime" documentation for details.

the timestamp format you're using is also known as the RFC(2)822 format.  the
"email" package contains several functions to deal with this format:

>>> x = 1112962934
>>> from email.Utils import formatdate
>>> formatdate(x) # default is utc
'Fri, 08 Apr 2005 12:22:14 -0000'
>>> formatdate(x, localtime=1)
'Fri, 08 Apr 2005 14:22:14 +0200'

>>> from email.Utils import parsedate_tz
>>> parsedate_tz(formatdate(x, localtime=1))
(2005, 4, 8, 14, 22, 14, 0, 1, 0, 7200)

for the full story, see:

    http://docs.python.org/lib/module-email.Utils.html

</F> 





From grante at visi.com  Wed Apr 27 10:27:12 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 27 Apr 2005 14:27:12 -0000
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
	<116tf7lm0ivnl6c@corp.supernews.com>
	<1114600793.617469.81200@z14g2000cwz.googlegroups.com>
Message-ID: <116v8a0kj2ba2e3@corp.supernews.com>

On 2005-04-27, dcrespo <dcrespo at gmail.com> wrote:

> Aaaaaaand: which do you prefer?

Neither particularly.  I'm using wxPython because GTK for
windows wasn't ready three years ago when I initially had to
write my first Windows application.  If I evaluated both of
them again today, I might choose GTK, and I might not.

-- 
Grant Edwards                   grante             Yow!  INSIDE, I have the
                                  at               same personality disorder
                               visi.com            as LUCY RICARDO!!


From artur_spruce at yahoo.com  Mon Apr 18 16:05:57 2005
From: artur_spruce at yahoo.com (AdSR)
Date: 18 Apr 2005 13:05:57 -0700
Subject: def a((b,c,d),e):
Message-ID: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>

Fellow Pythonistas,

Please check out

http://spyced.blogspot.com/2005/04/how-well-do-you-know-python-part-3.html

if you haven't done so yet. It appears that you can specify a function
explicitly to take n-tuples as arguments. It actually works, checked
this myself. If you read the reference manual at
http://docs.python.org/ref/function.html
really carefully, you will find that it is indeed part of the language
spec, but it's a likely candidate for the least advertised Python
feature. Small wonder since it looks like one of those language
features that make committing atrocities an order of magnitude easier.

Has anyone actually used it in real code?

Cheers,

AdSR



From mwm at mired.org  Fri Apr 22 01:43:41 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 00:43:41 -0500
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
	<3cr2caF6locm6U1@individual.net>
	<roy-41B7B8.22172521042005@reader1.panix.com>
Message-ID: <868y3btlgy.fsf@guru.mired.org>

Roy Smith <roy at panix.com> writes:

> Greg Ewing <greg at cosc.canterbury.ac.nz> wrote:
>> Also, everyone, please keep in mind that you always have
>> the option of using a *dictionary*, in which case your
>> indices can start wherever you want.
>> 
>> You can't slice them, true, but you can't have everything. :-)
>
> Of course you can slice them, you just have to subclass dict!  The 
> following was about 15 minutes work:
>
> ---------------
> import types
>
> class slicableDict (dict):
>     def __getitem__ (self, index):
>         if type (index) == types.SliceType:
>             d2 = slicableDict()
>             for key in self.keys():
>                 if key >= index.start and key < index.stop:
>                     d2[key] = self[key]
>             return d2
>         else:
>             return dict.__getitem__ (self, index)
>
> d = slicableDict()
> d['hen'] = 1
> d['ducks'] = 2
> d['geese'] = 3
> d['oysters'] = 4
> d['porpoises'] = 5
>
> print d
> print d['a':'m']
> ---------------

I couldn't resist:

py> d = slicableDict()
py> d[3j] = 1
py> d[4j] = 2
py> d[5j] = 3
py> d[6j] = 4
py> d[4j:5j]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 6, in __getitem__
TypeError: cannot compare complex numbers using <, <=, >, >=

Somehow, that seems like a wart.

         <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From richardblackwood at cloudthunder.com  Mon Apr 25 01:18:52 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Mon, 25 Apr 2005 01:18:52 -0400
Subject: Variables
Message-ID: <426C7DBC.9080604@cloudthunder.com>

I thought I'd share a piece of the discussion a friend of mine is having 
with a mathematician/programmer on this issue of variables:

> int foo = 5;
>
> Is foo not a variable? Within the scope of that statement, foo can be 
> no other value but 5. Is foo not a constant? Are constants and 
> variables not mutually exclusive? But wait, what if I write:
>
Yes, foo, here, is a variable in the program.  In this case, it is a 
variable that has been given a value at the same time that it is 
declared. It can, within the program, be changed at any time, as you 
illustrate with the following example:
Yet what if my program is a mere two lines where foo does not change 
(the following code is in Python):

foo = 5
print foo

Does the fact that foo fails to change in the execution of the /entire/ 
program invalidate its status as a variable? Or is it merely the 
potential to change (as enforced by the respective compiler) that 
defines foo as a variable? In a program where my name-value-couple (foo) 
does not change values, am I to consider foo a constant? What are the 
consequences of doing otherwise?

In programming (i.e. versus math) is the concept of variable and 
constant dependent on how a compiler processes identifiers and values in 
a program, and the various restrictions imposed on programmers regarding 
how they can manipulate those identifiers and values? For example, in 
C/C++ one can actually define constants, but this has a strict meaning 
in the sense that the compiler forces you to give constants known (?) 
values within the code which are then immutable. if I write the 
following program (pseudo-code):

const X = 5
print X
Y = 5
print Y

The only thing that makes X any more of a constant than Y is the fact 
that X is treated by the compiler as a constant--- I cannot change X's 
value with additional code, but I can change Y's, I merely happened to 
chose not to. From this standpoint, the notion of variable and constant 
in programming is very much bound to the way the language treats each, 
the "can"s and "cannot"s imposed on the programmer by the respective 
language. In Python, the interpreter unambiguously knows nothing about 
constants, and as many would argue, nothing about variables either (only 
names and values/data/objects).

>
> ...
>
>> ...
>
>> Is the definition of variable actually different between math and 
>> programming? And regardless, is the notion of variable so very 
>> ambiguous, even within each respective field?
>
>
> Variable is the same in both contexts.  In a computer *program*, 
> however, you can have statements such as "x = x+1" which is not 
> appropriate in mathematics.  You need there to be understanding that 
> within a computer a variable is treated as a place in the memory.  The 
> statement "x=x+1" refers to the process of looking at what is in x, 
> adding 1 to that value, and substituting that value back into the 
> location in memory. ... 

Many would argue a more general definition of variable: variables are 
symbolic references to data/values which can change. One math text in my 
possession concurs with this programming definition by stating a 
variable to be a symbol replaceable by a value which can change. Another 
(Scott Foresman, UCSMP, 1993) writes that a variable is "a letter or 
other symbol that can be replaced by any numbers (or other objects)." Is 
the definition of a variable, particularly in math, so simple? Your 
definition (identical to Raphael A. Finkel's [1996]) implies that, in 
such languages such as Python where names (i.e. foo) are mapped to 
values, there are no variables. For example, when I write foo = 5 in 
Python, the interpreter will create an integer 5 in memory, a name foo 
(unless it already exists), and then bound the name foo to the value 
int(5). Foo is not a place in memory in this sense, but instead a 
reference, a pointer that can direct us to values/data stored in various 
memory locations. Where foo points to (and hence what value foo provides 
us) can change. This is not like in C where foo would be a place in 
memory. In C, if I write int foo = 5, a block of memory is allocated for 
values of foo and 5 is stored there. If I later write foo = 6, the 
contents of foo's memory block are overwritten with the integer 6. In 
this memory based sense, values in C are bound to names, whereas in 
Python names are bound to values. Is it only the former case which 
defines a variable? Many would argue yes. Foo in Python is merely a name 
which can be mapped to a value they would say. On the other hand, many 
would argue no. They would say that a variable is simply an abstract or 
concrete "place" to store data. In the case of Python and the foo 
example, they would argue that foo is a variable in an abstract sense, 
though indeed not so semantically. But what functional good does focus 
on such details provide?

I agree with both camps. However, I posit that perhaps foo *is* 
semantically a variable in the practical sense that it exists in memory 
as a store of a value--- not 5 as in foo = 5, but the *reference* to the 
so-called anonymous object (the integer 5 in this case). The "value" of 
foo in Python is its reference to whatever value it is destine to return 
to us (as if that value was it's own).

Would you agree that the concept of variables differs in very important 
ways between the domains of math and programming?


From michael.kearns at REMOVEsaaconsultants.com  Mon Apr 11 12:09:01 2005
From: michael.kearns at REMOVEsaaconsultants.com (Michael Kearns)
Date: Mon, 11 Apr 2005 17:09:01 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <is2tmhzk.fsf@python.net>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
Message-ID: <425aa0fb$0$38041$bed64819@news.gradwell.net>

Thomas Heller wrote:

> For commercial development, it should not be a problem to buy a license
> for MSVC 7.1, which gives you the right to distribute msvcrt71.dll.
> 
> And maybe that's the reason that few people care about this issue?

Hi Thomas,

There are a few problems with this as I see it. In theory, the 'cost' of 
MSVC 7.1 shouldn't be a problem for a big organisation. However, I 
wouldn't expect to have to go and buy it purely because I'm developing 
(perhaps) a shareware application using python - this isn't my case, but 
I wasn't looking at it from just a big organisation perspective.

Also, I don't believe that just 'owning' MSVC 7.1 is enough. From 
cursory glances at the various redist files, I would also have to ship 
the EULA, and as an end-user (of python) I can't just redistribute the 
files - perhaps I could write a place holder application in  MSVC to 
suggest that I was no longer an end-user, but this seems ridiculous as a 
workaround.

There even seem to be 'exclude' clauses to redistribution concerning 
open-source material, but IANAL and ran from the various paragraphs.

I would like to think that python would encourage as many folk as 
possible to use the language wherever it fits best (and perhaps even 
beyond) and yet this is going in the opposite direction.

Would it be so difficult for a 'no legalese attached' version to be 
provided on windows, or at the very least, some kind of statement 
regarding what is and isn't allowed ? There seems nothing within the 
python distribution stating the redistribution rights of the dll 
(correct me if I'm wrong) which already seems contrary to the MS 
requirements.

As much as I'd like to continue using it, because of the vague legal 
situation, I can't, and that's unfortunate.

Michael.


From me at nowhere.invalid  Wed Apr  6 00:52:50 2005
From: me at nowhere.invalid (Mike L.G.)
Date: Wed, 06 Apr 2005 04:52:50 GMT
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <u3bu4sdzu.fsf@smtp.mahalosoft.com>

"ChinStrap" <caneff at gmail.com> writes:

> Opinions on what the best is? Or reading I could get to maybe sway me
> to Emacs (which has the major advantage of being on everyone's system).

When I first started using emacs, progress
was slow, but through my persistence, I was
able to harness the power of a very powerful
editor.  I find that with emacs I rarely
touch the mouse when editing code.

I just love the idea of splitting emacs into
multiple windows, one with my current
projects source code, another one with
py-shell loaded up (which makes for a
wonderful interactive python session with all
of your emacs key bindings), a third window
with GNUS (emacs news-reader) and lastly
chatting in a 4th window with ERC, an emacs
IRC chat client.  Doing all these activities
from within one editor just gives one an
enormous sense of satisfaction.  A one stop
shop editing tool-box at your disposal.

For me, maximum comfort working within emacs
included swapping the CTRL key with the CAPS
lock key.  It's just so much more comfortable on
the pinky finger!  In windows this meant
changing a registry key and on linux, altering
a keymap config. file.

Emacs may seem awkward at first, but the
payoff was amazing for me.  This is
comparable to my first experiences with
python.  Now, one of my greatest joys is
writing python code using emacs.

-- 

Mike L.G.
http://www.mahalosoft.com


From news at grauer-online.de  Wed Apr 13 07:21:21 2005
From: news at grauer-online.de (Uwe Grauer)
Date: Wed, 13 Apr 2005 13:21:21 +0200
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113311618.838281.205380@l41g2000cwc.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<op.so37qgvcqfv3if@localhost>
	<1113311618.838281.205380@l41g2000cwc.googlegroups.com>
Message-ID: <d3ivbe$hhi$1@online.de>

Kanthi Kiran Narisetti wrote:
> Hi All,
> 
> Thank You for your suggestions....I request you all to eloborate the
> Uses(In Practical) for systems administrator.Some of my questions
> regarding the same follows.
> 
> 1)Can i build web applications in Python ? If so how. I am planning to
> build a web application for intranet use which deals with workflow of
> Internal office communication.
> 
Look here:
http://www.python.org/moin/WebProgramming

> 2)Which is best opensource database to be used with Python ?
> 
I personally think that Firebird is a very good Database:
http://www.firebirdsql.org/
http://kinterbasdb.sourceforge.net/

> 3)When i write a remote execution script in python is it required that
> python should be installed in remote system.
> 
> 4)I heard about Perl/CGI and that CGI application done by python
> too.....Is CGI still valid when PHP has taken over the WebApplication
> Development, Dominating.
> 
> Sorry if these questions are out of this group , but answers to these ?
> will help me a lot.
> 
> Thanks in Advance
> 
> Kanthi.
> 


From bob_then at yahoo.com.au  Tue Apr 12 23:00:42 2005
From: bob_then at yahoo.com.au (James)
Date: Wed, 13 Apr 2005 13:00:42 +1000
Subject: permission
Message-ID: <425c8b44$1@dnews.tpgi.com.au>

Is it possible to check if you have permission to access and or change a
directory or file?




From ivoras at _-_fer.hr  Sun Apr 24 05:26:20 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Sun, 24 Apr 2005 11:26:20 +0200
Subject: Unicode problems, yet again
In-Reply-To: <mailman.2362.1114309342.1799.python-list@python.org>
References: <mailman.2362.1114309342.1799.python-list@python.org>
Message-ID: <d4foo1$vnr$1@bagan.srce.hr>

Jp Calderone wrote:

>  You don't have a string fetched from a database, in iso-8859-2, alas.  
> That is the root of the problem you're having.  What you have is a 
> unicode string.

Yes, you're right :) I actually did have iso-8859-2 data, but, as I 
found out late last night, the data got converted to unicode along the way.

Thanks to all who replied so quickly :)

>> (Does anyone else feel that python's unicode handling is, well... 
>> suboptimal at least?)
> 
>  Hmm.  Not really.  The only problem I've found with it is misguided 
> attempt to "do the right thing" by implicitly encoding unicode strings, 
> and this isn't so much of a problem once you figure things out, because 
> you can always do things explicitly and avoid invoking the implicit 
> behavior.

I'm learning that, the hard way :)

One thing that I always wanted to do (but probably can't be done?) is to 
set the default/implicit encoding to the one I'm using... I often have 
to deal with 8-bit encodings and rarely with unicode. Can it be done 
per-program?



From siona at chiark.greenend.org.uk  Mon Apr 25 10:38:42 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 25 Apr 2005 15:38:42 +0100 (BST)
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<IB6be.547$m85.139@newssvr30.news.prodigy.com>
Message-ID: <Ymh*8a0Mq@news.chiark.greenend.org.uk>

Philippe C. Martin <philippe at philippecmartin.com> wrote:
>How about popen of 'uname -r' ?

os.uname()[2] is probably a better way (ie it doesn't spawning
another process) of getting this information. I don't think it
will help the original poster though (depending on *what* it is
about FC3 which is breaking things) since it only provides the
kernel version.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From exogen at gmail.com  Wed Apr 27 11:28:04 2005
From: exogen at gmail.com (Brian Beck)
Date: Wed, 27 Apr 2005 11:28:04 -0400
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <d4ob28$2r0$1@eeyore.INS.cwru.edu>

monkey wrote:
> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
> 
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.

Here's been my experience:

* Don't underestimate IDLE, it's surprisingly capable considering it's
just a dinky little thing

* PyDev isn't yet mature enough to make it practical for me

* SPE has great features, but the pure-Python-ness makes it slow! Even
just typing at a steady pace is slowed down due to all the name lookups.
Plus, I still haven't found a way to reset the built-in Python shell, so
if you run/import your module into it, you have to reload the entire app
to reuse the shell. del <module-name> doesn't help because the classes
will still be in the registry

* WingIDE is the most advanced by far, but isn't free. Its built-in
Python shell also suffers from not easily being able to test _the module
you're writing_ without a bunch of path switching. I remember the
interface feeling slow on Windows, but on Linux everything is snappy.
The quickness of the autocompletion for even seperate module members
amazes me

* If you're running KDE, KDevelop is very capable. The autocompletion is
very generic though, it'll happily complete any word you've typed
before. The auto-indentation isn't nearly as spot-on as WingIDE's

* I hate PythonWin or whatever it's called. Dunno what more to say

--
Brian Beck
Adventurer of the First Order


From rupole at hotmail.com  Fri Apr 29 21:24:32 2005
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 29 Apr 2005 21:24:32 -0400
Subject: Killing process
References: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>
Message-ID: <4272df20$1_2@127.0.0.1>

TerminateProcess takes a process handle, not a pid.
win32api.OpenProcess will give you a handle.

         Roger

"Harlin Seritt" <harlinseritt at yahoo.com> wrote in message 
news:1114823011.063614.27150 at l41g2000cwc.googlegroups.com...
>I am using os.getpid() to get the pid value for a script running. I
> store that value (as a string) to a file. Later when I try to kill that
> pid (i pull this from the file as a string value) I get  errors.
>
> Using the following lines I get the subsequent error.
>
> (pid is a string value)
> win32api.TerminateProcess(int(pid), 0)
>
> OR
>
> ctypes.windll.kernel32.TerminateProcess(int(pid), 0)
>
> Errors:
>
> Exception in Tkinter callback
> Traceback (most recent call last):
>  File "C:\Python23\lib\lib-tk\Tkinter.py", line 1345, i
>    return self.func(*args)
>  File "vngconsole.py", line 27, in StopVngSvc
>    win32api.TerminateProcess(int(pid), 0)
> error: (6, 'TerminateProcess', 'The handle is invalid.')
>
> How exactly do I kill a pid using a string value?
> 




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


From http  Sat Apr  2 15:28:13 2005
From: http (Paul Rubin)
Date: 02 Apr 2005 12:28:13 -0800
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
	<d2mmi8$g9t$1@panix2.panix.com>
Message-ID: <7xmzsg3ov6.fsf@ruckus.brouhaha.com>

aahz at pythoncraft.com (Aahz) writes:
> This is one case where'd recommend using a plan RLock() instead of using
> Queue -- the RLock() will be more efficient...

I'm starting to believe the GIL covers up an awful lot of sloppiness
in Python.  I wonder if there could be a decorator approach:

    @synchronized
    def counter():
       t = itertools.count()
       while True:
         yield t.next()

or better yet,

    counter = synchronized(itertools.count())


From fredrik at pythonware.com  Sun Apr 24 11:52:36 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 17:52:36 +0200
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<d4ge1f$n13$1@sea.gmane.org>
Message-ID: <d4gf29$pc3$1@sea.gmane.org>

Robert Kern wrote:

> It's consistent with using a.extend("world") which is what the += is
> sugar for.
>
> In [1]:a = ['hello']
>
> In [2]:a.extend("world")
>
> In [3]:a
> Out[3]:['hello', 'w', 'o', 'r', 'l', 'd']
>
> It's a *good* thing that .extend() takes any iterable without explicit
> conversion to a list. I think that it's just a minor annoyance that the
> behavior passes on to +=.

mapping += to extend is a design mistake (I guess someone got a
little carried away).

</F>





From ckwiguno at gmail.com  Tue Apr 19 20:24:41 2005
From: ckwiguno at gmail.com (Clara)
Date: 19 Apr 2005 17:24:41 -0700
Subject: Thanks
Message-ID: <1113956681.662566.25360@g14g2000cwa.googlegroups.com>

Yes that solves my problem all right...THanks a bunch to both of you



From mahs at telcopartners.com  Thu Apr  7 13:51:02 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 07 Apr 2005 10:51:02 -0700
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d33oab$t78$1@sea.gmane.org>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<mailman.1222.1112417820.1799.python-list@python.org>	<d2vhi8$k29$1@panix1.panix.com>	<4253fe0c$1@nntp0.pdx.net>	<3bjtvuF6d00nnU2@individual.net>	<42556347.9030901@chamonix.reportlab.co.uk>
	<d33oab$t78$1@sea.gmane.org>
Message-ID: <d33rps$a1g$1@sea.gmane.org>

Steve Holden wrote:

>>
> Not at all - we just apply the same division techniques to the buffer 
> space until we can map the pieces of cake one-to-one onto the buffers.
> 
That technique can be applied to layer cakes, but not all real cakes.

Michael



From robin at reportlab.com  Tue Apr 26 14:32:29 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 26 Apr 2005 19:32:29 +0100
Subject: regex over files
In-Reply-To: <17006.31984.182979.430076@montanaro.dyndns.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
Message-ID: <426E893D.2070905@chamonix.reportlab.co.uk>

Skip Montanaro wrote:
>     Robin> So we avoid dirty page writes etc etc. However, I still think I
>     Robin> could get away with a small window into the file which would be
>     Robin> more efficient.
> 
> It's hard to imagine how sliding a small window onto a file within Python
> would be more efficient than the operating system's paging system. ;-)
> 
> Skip
well it might be if I only want to scan forward through the file (think lexical 
analysis). Most lexical analyzers use a buffer and produce a stream of tokens ie 
a compressed version of the input. There are problems crossing buffers etc, but 
we never normally need the whole file in memory.

If the lexical analyzer reads the whole file into memory then we need more 
pages. The mmap thing might help as we need only read pages (for a lexical scanner).

Scanners work by detecting the transitions between tokens so even if the tokens 
are very long we don't need to store them twice (in the input stream and token 
accumulator); I suppose that could be true of regex pattern matchers, but it 
doesn't seem to be for re ie we need the entire pattern in the input before we 
can match and extract to an accumulator.
-- 
Robin Becker



From tchur at optushome.com.au  Mon Apr  4 06:43:12 2005
From: tchur at optushome.com.au (Tim Churches)
Date: Mon, 04 Apr 2005 20:43:12 +1000
Subject: DIY Spam Filter in Python
In-Reply-To: <9d5509fa.0504040039.526c93b6@posting.google.com>
References: <9d5509fa.0504040039.526c93b6@posting.google.com>
Message-ID: <42511A40.7070702@optushome.com.au>

Peter Ballard wrote:
> I've no idea if this will be of any use to anyone. But since I've gone
> to the effort of writing it, I might as well make it publicly
> available...
> 
> Until last year, spam filtering was a source of frustration for me.
> Freeware packages I tried (specifically, spamassassin and dspam) were
> difficult to use. Custom rules using procmail were a pain.
> 
> Then I noticed that python came with email parsing capabilities in the
> email module. So I thought that maybe custom rules in python would be
> easier than (a) custom rules in procmail, or (b) deciphering the
> documentation of a package. And a lot more fun.
> 
> It turned out to be very easy. I got the filter up in a few evenings,
> and I've been using it successfully, and slowly enhancing it, over a
> number of months.
> 
> In short: a success story for "using the batteries" - at least in my
> opinion.
> 
> Source code, and a bit of documentation, is at:
> http://members.ozemail.com.au/~pballard/diyspamfilter.html
> 
> --
> Regards,
> 
> Peter Ballard
> Adelaide, AUSTRALIA
> http://members.ozemail.com.au/~pballard/

Pete mate,

Nice work, but your Web page on your DIY Spam Filter doesn't mention
SpamBayes, which is surely the definitive Pythonic spam filter, as well
as being eerily effective - see http://spambayes.sourceforge.net

Not sure that the Reverend Bayes would have agreed with your theology -
a bit too post-modern for him, no doubt, but he was nevertheless a
lovely little thinker.

Tim C


From peter at engcorp.com  Mon Apr  4 09:33:11 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 04 Apr 2005 09:33:11 -0400
Subject: unittest vs py.test?
In-Reply-To: <6oQ3e.10378$db.6219@trndny07>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07>
Message-ID: <Sd6dnU9B46Le38zfRVn-uA@powergate.ca>

Raymond Hettinger wrote:
> [Peter Hansen]
>>(I'm not dissing py.test, and intend to check it
>>out.
> 
> Not to be disrepectful, but objections raised by someone
> who hasn't worked with both tools equate to hot air.

Not to be disrespectful either, but criticism by
someone who has completely missed my point (and apparently
not read my posts) doesn't seem entirely fair.

At no time in this thread have I objected to py.test.
The sole point of my posts has been to object to those
claiming unittest as "heavy" when in the same
breath they seem to think you have to know all kinds
of details about TestSuite, TestRunner, and TestResult
objects just to use it.  I tried to demonstrate that
my way of using it appears to be on the same order of
"lightness" as some of the samples that were being used
to show how much lighter py.test was.

> Until you've exercised both packages, you haven't helped the OP
> whose original request was:  "Is there anybody out there who has
> used both packages and can give a comparative review?"

It seems possible to me that I might have helped him
solely by pointing out that unittest might not be so
"heavy" as some people claimed.  I got the impression
that he might be swayed by some unfounded claims not
even to look further at unittest, which I felt would
be a bad thing. (Not to say your comments are unfounded,
as clearly they are valid... I happen to believe mine
have been, in this thread, as well.  I guess you're
free to believe otherwise.  Cheers.)

-Peter


From tganss_at_t_dash_online_dot_de-remove-all-after-first-real-dash at yahoo.com  Fri Apr 29 01:08:16 2005
From: tganss_at_t_dash_online_dot_de-remove-all-after-first-real-dash at yahoo.com (Thomas Ganss)
Date: Fri, 29 Apr 2005 07:08:16 +0200
Subject: win32ui CreateFileDialog SLOW (since the SP2 Windows XP patch?)
In-Reply-To: <1114660828.584660.126820@f14g2000cwb.googlegroups.com>
References: <1114644362.619393.317800@l41g2000cwc.googlegroups.com>
	<MPG.1cdae4d3b1ffa39698968e@news-server>
	<1114660828.584660.126820@f14g2000cwb.googlegroups.com>
Message-ID: <d4sfd5$er4$05$1@news.t-online.com>

MsKitty schrieb:
> Neil -
> Interesting theory, but I installed brand new versions of Python
> (2.4.1) and the win32 extensions on a machine that had no Python and
> got the the same 4 minute response time, so that does not seem a likely
> explanation, although its possible.
>   - Kitty
> 
Standalone machine or connected to a network ?
By any chance an older server (W2K,NT4) there ?

There were some issues...

HTH

thomas


From kristian.zoerhoff at gmail.com  Thu Apr  7 16:55:29 2005
From: kristian.zoerhoff at gmail.com (Kristian Zoerhoff)
Date: Thu, 7 Apr 2005 15:55:29 -0500
Subject: curious problem with large numbers
In-Reply-To: <qnkfyy2gwc4.fsf@arbutus.physics.mcmaster.ca>
References: <mailman.1503.1112903288.1799.python-list@python.org>
	<qnkfyy2gwc4.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <3511dc7505040713552349b49@mail.gmail.com>

On Apr 7, 2005 3:34 PM, David M. Cooke 
> 
> I don't do Windows, so I can't say this will work, but try
> 
> >>> inf = 1e308*2

I *do* do Windows, and that does work. The value of inf then becomes
'1.#INF' as expected. Strangely, doing

float('1.#INF')

still fails on Windows. Weird, weird.

-- 
Kristian

kristian.zoerhoff(AT)gmail.com
zoerhoff(AT)freeshell.org


From RonGrossi382576 at yahoo.com  Fri Apr 15 21:06:48 2005
From: RonGrossi382576 at yahoo.com (RonGrossi382576 at yahoo.com)
Date: 15 Apr 2005 18:06:48 -0700
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 140)
Message-ID: <1113613608.511723.298610@o13g2000cwo.googlegroups.com>


The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrongdoing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi

*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!

____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.browser.to/jesus-animation

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.bibledatabase.net


____________________________________________________



The Death of John Paul II

John Paul II gained the whole world but
forfeited his soul. Year after year he
was the most loved and admired man in
the world. The idolatrous veneration
and adoration of this man was
unprecedented. His devotees, who are now
singing his praises, are probably
ignorant of the strong rebuke of Jesus
who said, "Woe to you when all men speak
well of you" (Luke 6:26). Had the pope
been devoted to Jesus Christ and His
Gospel of grace, he would have been
hated and persecuted by the world.
No one can judge John Paul's heart but
we are all called to judge the fruit of
our spiritual leaders. Clearly this man
was blinded by the prince of this world
and never saw the light of the gospel or
the glory of Christ. I mourn the death
of this man, not for the reason the
world mourns, but because he rejected
Jesus as God's only provision for his
sins. I also have a solemn compassion
for those who blindly followed this pope
and his man-centered religion. My heart
is painfully burdened to see so many
"professing" Christians unable to
discern truth from error and genuine
Christianity from its counterfeit.

The rest of this article that was
written by Mike Gendron can be found
at >> http://www.pro-gospel.org/main/Topics/topic-027.php


____________________________________________________



From radam2 at tampabay.rr.com  Sun Apr  3 16:20:56 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 20:20:56 GMT
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<1112466233.403989.125810@l41g2000cwc.googlegroups.com>
	<b8lu411dfphm8lbc6tc5anpq9m2tn3qlef@4ax.com>
	<1112516432.638697.193840@o13g2000cwo.googlegroups.com>
	<2erv41d8ilujl0vmformr26vm0tvhf689o@4ax.com>
	<1112552255.356217.81640@f14g2000cwb.googlegroups.com>
Message-ID: <n5d0515uhjfnrq6i536bhu50clp7j91d8h@4ax.com>

On 3 Apr 2005 11:17:35 -0700, "George Sakkis" <gsakkis at rutgers.edu>
wrote:

>>def define(func):
>>    if not ENABLE_TYPECHECKING:
>>        return lambda func: func
>>    # else decorate func
>
>A small correction: The argument of the decorator is not 'func' but the
>parameter checks you want to enforce. A template for define would be:
>
>def define(inputTypes, outputType):
>    if not ENABLE_TYPECHECKING:
>        return lambda func: func
>    def decorate(func):
>        def typecheckedFunc(*args,**kwds):
>            ##### TYPECHECK *args, **kwds HERE #####
>            r = func(*args,**kwds)
>            ##### TYPECHECK r HERE #####
>            return r
>        return typecheckedFunc
>    return decorate

This is the same pattern I used except without the enable/disable at
the top.

The inline type check function also checks for TYPECHECK == True, and
TYPESTRICT == False, as default to determine the strictness of the
type checking wanted.  Where TYPESTRICT == True, causes it to give an
error if they are not the correct type, even if they are the exact
value. TYPESTRICT == False, result in it trying to convert the object,
then checks it, by converting it back to the original type. If it's
still equal it returns the converted object in the specified type.

>Depending on how much flexibility you allow in inputTypes, filling in
>the typechecking logic can be from easy to challenging. For example,
>does typechecking have to be applied in all arguments or you allow
>non-typechecked aruments ? Can it handle *varargs and **kwdargs in the
>original function ? An orthogonal extension is to support 'templated
>types' (ala C++), so that you can check if something is 'a dict with
>string keys and lists of integers for values'. I would post my module
>here or the cookbook but at 560 (commented) lines it's a bit long to
>qualify for a recipe :-)
>
>George

Sounds like your version does quite a bit more than my little test
functions. :)  

I question how far type checking should go before you are better off
with a confirmtypes() function that can do a deep type check. And then
how much flexibility should that have? 

My view point is that type checking should be available to the
singleton types, with conversions only if data integrity can be
insured. ie.. the conversion is reversible with an "identical" result
returned.

def type_convert( a, t): 
    b = t(a)
    aa = type(a)(b)
    if a == aa:
        return b
    else:
        raise TypeError  

In cases where a conversion is wanted, but type checking gives an
error, an explicit conversion function or method should be used.  

In containers, and more complex objects, deep type checking should be
available through a general function which can compare an object to a
template of types, specific to that object. It's important to use a
template instead of a sample, because a sample could have been
changed. 

It's all about protecting the data content with a high degree of
confidence.  In general, 98% of the time the current python way would
be adequate, but those remaining 2% are important enough to warrant
the additional effort that type checking takes.

On another note, there's the possibility that type checking in python
source code could make writing a compiler easier.

Another idea is that of assigning a name a type preference. And then
overload the assign operators to check for that first before changing
a name to point to a new object.  It could probably be done with a
second name dictionary in name space with {name:type} pairs. With that
approach you only need to give key variables a type, then they keep
that type preference until it's assigned a new type, or removed from
the list. The down side to this is that it could slow things down.

Cheers,
Ron



From mauriceling at acm.org  Thu Apr 21 18:08:24 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 22 Apr 2005 08:08:24 +1000
Subject: python LEX
References: <d47mli$d1v$1@bagan.srce.hr>
Message-ID: <d4988o$6j7$1@domitilla.aioe.org>

jozo wrote:
> I have to work on python lexical definition in Lex. I spent lots of my
> time to find regular expresions written for Lex of Python language but
> nothing.
> Can somebody help me?
> 
> I nEED hELP 
> 
> 

Jython has a Python language lexer written using JavaCC.


From steve at holdenweb.com  Tue Apr 12 15:18:13 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 15:18:13 -0400
Subject: exporting imports to reduce exe size?
In-Reply-To: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>
References: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>
Message-ID: <d3h6n6$2de$1@sea.gmane.org>

Ron_Adam wrote:
> In looking at ways to reduce the size of exe's created with py2exe,
> I've noticed that it will include a whole library or module even if I
> only need one function or value from it.  
> 
> What I would like to do is to import individual functions and then
> export 'write' them to a common resource file and import that with
> just the resources I need in them.
> 
You've been thinking again, Ron ...

> Has anyone tried this?  
> 
I'd be surprised if they had (see below).

> I'm considering using pickle to do it, but was wondering if this is
> even a viable idea?  
> 
What would you pickle and what not? The reason that a function is stored 
in a module is often because the module contains other supporting code 
that it needs. Generally the elements of a module should have a 
higher-than-random degree of interdependence.

> Is it possible to pickle the name space after the imports and then
> reload the name space in place of the imports later?
> 
This would be quite a feat of introspection if you could do it.

> Cheers, 
> Ron
> 

As another respondent suggested the savings of this technique would 
likely not be a reasonable return on  the development and support effort.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From jepler at unpythonic.net  Sun Apr  3 13:25:11 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 3 Apr 2005 12:25:11 -0500
Subject: "specialdict" module
In-Reply-To: <3bamhhF6j009lU1@individual.net>
References: <3bamhhF6j009lU1@individual.net>
Message-ID: <20050403172510.GB3398@unpythonic.net>

The software you used to post this message wrapped some of the lines of
code.  For example:
>     def __delitem__(self, key):
>         super(keytransformdict, self).__delitem__(self,
> self._transformer(key))

In defaultdict, I wonder whether everything should be viewed as a
factory:
    def setdefaultvalue(self, value):
        def factory(): return value
        self.setdefaultfactory(factory)

and the "no-default" mode would either cease to exist, or 
    def cleardefault(self):
        def factory(): 
            raise KeyError, "key does not exist and no default defined"
        self.setdefaultfactory(factory)
(too bad that the key isn't available in the factory, this degrades the
quality of the error messge)

if so, __getitem__ becomes simpler:
    __slots__ = ['_default']
    def __getitem__(self, key):
      try:
          return super(defaultdict, self).__getitem__(key)
      except KeyError:
          return self.setdefault(key, apply(*self._default))

I don't ever have an itch for sorted dictionaries, as far as I can
remember, and I don't immediately understand the use of
keytransformdict.  Can you give an example of it?

Jeff
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From trentm at ActiveState.com  Mon Apr 18 19:31:17 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Mon, 18 Apr 2005 16:31:17 -0700
Subject: Updating Windows File Summary Data
In-Reply-To: <1113860278.876481.210270@z14g2000cwz.googlegroups.com>
References: <1113860278.876481.210270@z14g2000cwz.googlegroups.com>
Message-ID: <20050418233117.GE1979@ActiveState.com>

[Denrael wrote]
> I am looking for a way in Python to update Windows File Summary
> Metadata. By that I mean the data (Title, Subject, Keywords, Comments)
> found when you right click a windows file, select properties and then
> summary. Can anyone point me in the right direction?

I'm not sure if modifying that metadata works the same way as updating
version metadata. If so, verstamp.py here might help you get started:

    http://cvs.sourceforge.net/viewcvs.py/pywin32/pywin32/win32/scripts/VersionStamp/ 

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From fiedzia at fiedzia.prv.pl  Tue Apr 26 06:46:34 2005
From: fiedzia at fiedzia.prv.pl (Maciej Dziardziel)
Date: Tue, 26 Apr 2005 12:46:34 +0200
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
Message-ID: <20050426104635.2708.0.NOFFLE@fiedzia.homeip.net>

ajikoe at gmail.com wrote:

> Hello,
> 
> If I use os.remove(fileName), does it always assure that the code will
> move to the next code only if the fileName is deleted completely?

Yes, it will be deleted, but not necessary completly. Deleting isn't equal
to erasing file's content, so it might be possible to recover deleted file,
plus on some systems  deleted files are kept for those processes (and only
for them), who are still using them, and disappear  when everyone close
them.

-- 
Maciej "Fiedzia" Dziardziel (fiedzia (at) fiedzia (dot) prv (dot) pl)
www.fiedzia.prv.pl

Giraffiti: Concrete art spray-painted very, very high.


From steve at holdenweb.com  Wed Apr  6 10:30:47 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 06 Apr 2005 10:30:47 -0400
Subject: formatting file
In-Reply-To: <20050406132226.25060.qmail@web50110.mail.yahoo.com>
References: <20050406132226.25060.qmail@web50110.mail.yahoo.com>
Message-ID: <d30rma$ing$2@sea.gmane.org>

SPJ wrote:
> Hi,
> 
> I am new to python hence posing this question.
> I have a file with the following format:
> 
> test1    1.1-1   installed
> test1    1.1-1   update
> test2    2.1-1   installed
> test2    2.1-2   update
> 
> I want the file to be formatted in the following way:
> 
> test1    1.1-1   1.1-2
> test2    2.1-1   2.1-2
> 
> How can I achieve this? I am stuck here.
> 
I suspect you need to

   a) remove the error in your specification (should there
      not be a "1.1-2 somewhere in the input) and/or

   b) explain the exact intent in a little more detail -
      we aren't psychic, and while the problem may be very
      obvious to you, we aren't inside your head with it!

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From postmaster at castleamber.com  Sat Apr 23 23:03:30 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 03:03:30 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
Message-ID: <Xns9641E05B2BE91castleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <postmaster at castleamber.com> writes:
> 
>> Mike Meyer wrote:
>>
>>> "Simon John" <simoninusa2001 at yahoo.co.uk> writes:
>>> 
>>>> I still love Perl, it's a bit of an art form, as "there's more than
>>>> one way to do it", whereas Python usually only allows one way to do
>>>> it, which may or may not be a better mantra....
>>> 
>>> The Python mantra leads to 1) less programmer overhead, and 2) 
faster
>>> improvements in the language.
>>> 
>>> To be a Perl expert, you have to know which of the many ways to do
>>> various things is the fasted under what conditions.
>>
>> Why?
> 
> One of the stated conditions for more than one Perl position I've
> looked at.

That's weird, since some can differ between versions of Perl like for 
example a map in a void context. And I am sure Python has now and then 
improvements which make one operation suddenly 10% faster in a new 
version.

So it tells you a lot about the people providing the position ;-)

>>> Having only one obvious way
>> I doubt that too ;-)
> 
> Try programming in older Python for a while. You'll quit doubting it.

Again I doubt that. I doubt that if I give 100 old Python programmers a 
certain computer science problem I will see 100 exactly the same 
solutions, which when benchmarked run equally fast.

>>> to do things means developers only have to
>>> worry about impact on that way when making improvements, which will
>>> speed them up.
>> Yeah, Perl programmers are extremely slow ;-)
> 
> Nah, they aren't slow. They just have to worry about more things than
> the Python developers.

Do you have references to this? I would love to see if indeed 100 Python 
programmers do implement, say 5 CS tasks faster compared to 100 Perl 
programmers, on average.

>> In most cases, why worry? If speed is an issue you should probably 
have
>> picked a different programming language in the first place (for that
>> part of the code). 
> 
> You apparently haven't been programming in Python very long.

Nope. I think I copied 3 examples and had a peek at it. I did read the 
tutorial (twice) and am rereading Dive into Python.

> If speed
> is an issue, you should probably pick a different
> algorithm. Well-written Python programs use the C-coded parts of
> Python for the time-critical part of the code.

Why are those time critical parts not written in Python ;-)

>> Use the one that is the easiest to read and understand by yourself.
>> That's how I program Perl, and that's how I am going to program 
Python. 
> 
> The thing is, in Python there usually is one obvious way to do
> things. That's changed in recent years as improvements have been added
> without dropping the features they replaced so as not to break old
> programs.

I know to little about Python, especially about old Python, to have an 
idea of what you mean. I only saw, quite recently, someones solution to 
a problem that used 30 lines of Python, and I am sure I could have 
written it in 3-4. And I doubt that's because he was using, or I was 
thinking in, new Python
:-D.

>> An overloaded toolbox doesn't mean that if you have to hang a 
painting
>> on the wall that you have to think for 6 hours which tool you should
>> use. You just take the one that does the job in a way you feel
>> comfortable with. I know that the Perl mantra is often misunderstood,
>> but in my experience only by people who have very little experience 
with
>> the language. 
> 
> The problem with using "the way you feel comfortable with" is that it
> may not be comfortable for the maintainer - even if that's you six
> months from now.

After 5 years one gets comfortable with most constructions in a 
language. I am more often uncomfortable with the way someone translates 
a problem into code. And there is no way how you can force people with a 
language that is, to do that the same, not even close.

> My Perl evolved from very shell script like (lots of
> backticks and passing around the full text of files)

I am sure you can do that with Python too.

> to one more
> C-like as I used the language. That change was largely driven by
> performance concerns as my understanding of the language grew.

Yup, in Perl one should program Perl, not bash, not C. Same for Python.

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


From franz.steinhaeusler at utanet.at  Tue Apr  5 06:13:59 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Tue, 05 Apr 2005 12:13:59 +0200
Subject: Eric3 under WinXP
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
	<mailman.1366.1112689020.1799.python-list@python.org>
	<i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>
	<mailman.1370.1112692486.1799.python-list@python.org>
Message-ID: <8to45154ueb3m8gfb0sj1v3ud24j5jnm7d@4ax.com>

On Tue, 5 Apr 2005 10:14:48 +0100 (BST), "Phil Thompson"
<phil at riverbankcomputing.co.uk> wrote:

>> On Tue, 5 Apr 2005 09:17:05 +0100 (BST), "Phil Thompson"
>> <phil at riverbankcomputing.co.uk> wrote:
>>
>> What steps are missing?
>
>If you are using the evaluation version of Qt then you need the evaluation
>version of PyQt. This already includes SIP and QScintilla.
>
>Phil
Hello Phil,

Ok, new begin.

I installed PyQt 3.14.1 Evaluation now.
If I want to start for example aclock.py, I get:

ImportError: No module named qt
Is there any dll missing?

Or doesn't it fit with "Qt 3.3.4 Evaluation"

Any hints?

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From radam2 at tampabay.rr.com  Sun Apr  3 14:00:36 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 18:00:36 GMT
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
	<prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>
	<d2mqcl$r6t$02$1@news.t-online.com>
	<g3tt411e3ag0sak0ehckmsl3dou92sjuei@4ax.com>
	<424F8DE9.7070501@v.loewis.de>
Message-ID: <gv7051pcr1iklfpbnkphabom8n9ldu0elv@4ax.com>

On Sun, 03 Apr 2005 08:32:09 +0200, "Martin v. L?wis"
<martin at v.loewis.de> wrote:

>Ron_Adam wrote:
>> I wasn't aware that the form:
>> 
>> 	result = function(args)(args)
>> 
>> Was a legal python statement.
>> 
>> So python has a built in mechanism for passing multiple argument sets
>> to nested defined functions! (click)  Which means this is a decorator
>> without the decorator syntax.
>
>No. There is no mechanism for passing multiple argument sets to
>nested functions. Instead, functions are objects, which can be
>assigned to variables, passed as arguments to other functions,
>and returned:

Yes there is, it's the stack python uses to interpret the byte code.
But it's the same mechanism that is used for passing arguments to
sequential function calls (objects) also.  The only difference is the
next function (object) is returned on the stack in the nested case.
Then the next argument is then put on to the stack (passed), before
the next function is called.  

How you view this depends on the frame of reference you use, I was
using a different frame of reference, which I wasn't sure was correct
at the time, but turns out is also valid.  So both view points are
valid. 

In any case, I now have a complete picture of how it works. Inside,
and out. Which was my goal.  :)

>> So this isn't a decorator question any more.  Each argument gets
>> passed to the next inner defined function,  via... a stack(?)  ;)
>
>No, functions are objects. Notice that in step 1, the object returned
>doesn't have to be a function - other things are callable, too, like
>types, classes, and objects implementing __call__.

They are objects; which are data structures; containing program code &
data; which reside in memory; and get executed by, in this case, a
byte code interpreter.  The interpreter executes the byte code in a
sequential manner, using a *stack* to call functions (objects), along
with their arguments.

For the record, I never had any trouble understanding the concept of
objects. I think I first started programming OOP in the mid '90's with
c++.

It was the sequence of events in the objects of the nested def
functions that I was trying to understand along with where the objects
get their arguments, which isn't obvious because of the levels of
indirect calling.

Thanks for the help Martin, it's always appreciated.  :)

Cheers,
Ron


>Regards,
>Martin



From andreis at stud.cs.uit.no  Fri Apr 15 04:15:47 2005
From: andreis at stud.cs.uit.no (=?ISO-8859-1?Q?Andr=E9_S=F8reng?=)
Date: Fri, 15 Apr 2005 10:15:47 +0200
Subject: RE Engine error with sub()
In-Reply-To: <d3nhqk$dlo$1@domitilla.aioe.org>
References: <d3nhqk$dlo$1@domitilla.aioe.org>
Message-ID: <d3nt7i$1nua$1@news.uit.no>


Instead of using regular expressions, you could perhaps
use a multiple keyword matcher, and then for each match,
replace it with the correct string.

http://hkn.eecs.berkeley.edu/~dyoo/python/ahocorasick/

contains the Aho-Corasick algorithm written in C with
a Python extension.


Maurice LING wrote:
> Hi,
> 
> I have the following codes:
> 
> from __future__ import nested_scopes
> import re
> from UserDict import UserDict
> 
> 
> class Replacer(UserDict):
>     """
>     An all-in-one multiple string substitution class. This class was 
> contributed by Xavier
>     Defrang to the ASPN Python Cookbook 
> (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81330)
>     and alane at sourceforge.net.
> 
>     Copyright: The methods _make_regex(), __call__() and substitute() 
> were the work of Xavier Defrang,
>     __init__() was the work of alane at sourceforge.net, all others were 
> the work of Maurice Ling"""
> 
>     def __init__(self, dict = None, file = None):
>         """Constructor. It calls for the compilation of regular 
> expressions from either
>         a dictionary object or a replacement rule file.
> 
>         @param dict: dictionary object containing replacement rules with 
> the string to be
>                         replaced as keys.
>         @param file: file name of replacement rule file
>         """
>         self.re = None
>         self.regex = None
>         if file == None:
>             UserDict.__init__(self, dict)
>             self._make_regex()
>         else:
>             UserDict.__init__(self, self.readDictionaryFile(file))
>             self._make_regex()
> 
>     def cleanDictionaryFile(self, file):
>         """
>         Method to clean up the replacement rule dictionary file and 
> write the cleaned
>         file as the same name as the original file."""
>         import os
>         dict = self.readDictionaryFile(file)
>         f = open(file, 'w')
>         for key in dict.keys(): f.write(str(key) + '=' + str(dict[key]) 
> + os.linesep)
>         f.close()
> 
>     def readDictionaryFile(self, file):
>         """
>         Method to parse a replacement rule file (file) into a dictionary 
> for regular
>         expression processing. Each rule in the rule file is in the form:
>             <string to be replaced>=<string to replace with>
>             """
>         import string
>         import os
>         f = open(file, 'r')
>         data = f.readlines()
>         f.close()
>         dict = {}
>         for rule in data:
>             rule = rule.split('=')
>             if rule[1][-1] == os.linesep: rule[1] = rule[1][:-1]
>             dict[str(rule[0])] = str(rule[1])
>         print '%s replacement rule(s) read from %s' % 
> (str(len(dict.keys())), str(file))
>         return dict
> 
>     def _make_regex(self):
>         """ Build a regular expression object based on the keys of the 
> current dictionary """
>         self.re = "(%s)" % "|".join(map(re.escape, self.keys()))
>         self.regex = re.compile(self.re)
> 
>     def __call__(self, mo):
>         """ This handler will be invoked for each regex match """
>         # Count substitutions
>         self.count += 1 # Look-up string
>         return self[mo.string[mo.start():mo.end()]]
> 
>     def substitute(self, text):
>         """ Translate text, returns the modified text. """
>         # Reset substitution counter
>         self.count = 0
>         # Process text
>         #return self._make_regex().sub(self, text)
>         return self.regex.sub(self, text)
> 
>     def rmBracketDuplicate(self, text):
>         """Removes the bracketed text in occurrences of '<text-x> 
> (<text-x>)'"""
>         regex = re.compile(r'(\w+)\s*(\(\1\))')
>         return regex.sub(r'\1', text)
> 
>     def substituteMultiple(self, text):
>         """Similar to substitute() method except that this method loops 
> round the same text
>         multiple times until no more substitutions can be made or when 
> it had looped
>         10 times. This is to pre-ampt for cases of recursive 
> abbreviations."""
>         count = 1 # to get into the loop
>         run = 0 # counter for number of runs thru the text
>         while count > 0 and run < 10:
>             count = 0
>             text = self.rmBracketDuplicate(self.substitute(text))
>             count = count + self.count
>             run = run + 1
>             print "Pass %d: Changed %d things(s)" % (run, count)
>         return text
> 
> 
> 
> 
> Normally I will use the following to instantiate my module:
> 
> replace = Replacer('', 'rule.mdf')
> 
> rule.mdf is in the format of "<string to be replaced>=<string to replace 
> with>\n"
> 
> Then using replace.substituteMultiple('<my text>') to carry out multiple 
> replacements.
> 
> It all works well for rule count up to 800+ but when my replacement 
> rules swells up to 1800+, it gives me a runtime error that says 
> "Internal error in regular expression engine"... traceable to "return 
> self.regex.sub(self, text)" in substitute() method.
> 
> 
> Any ideas or workarounds?
> 
> Thanks in advance.
> 
> Cheers,
> Maurice


From sheila at spamcop.net  Fri Apr 22 02:45:11 2005
From: sheila at spamcop.net (Sheila King)
Date: Fri, 22 Apr 2005 06:45:11 GMT
Subject: time.strftime in 2.4.1 claims data out of range when not
Message-ID: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>

I have a web app that has been running just fine for several months under 
Python 2.2.2.

We are preparing to upgrade the server to run Python 2.4.1.

However, part of my web app is throwing an error on this code (that has 
previously worked without exception):

>>> time.strftime("%Y-%m-%d", (Y, M, D, 0,0,0,0,0,0))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: day of year out of range
>>> Y
2005
>>> M
5
>>> D
15L


I don't see what parts of the date that I have submitted to strftime are out 
of range?

Also, the phrasing of the error message is a bit odd?
"day of year out of range"

I'm not sure what the
day of a year

would be???

Sheila King
http://www.thinkspot.net/sheila/




From deetsNOSPAM at web.de  Fri Apr 29 09:25:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 29 Apr 2005 15:25:49 +0200
Subject: undefined symbol: PyUnicodeUCS4_AsUTF8String
References: <46o9k2-qe4.ln1@nb2.stroeder.com>
Message-ID: <d4tckr$3s1$02$1@news.t-online.com>

Michael Str?der wrote:

> HI!
> 
> I have the following problem after system upgrade to SuSE Linux 9.3:
> 
> $ python -c "import cPickle"
> Traceback (most recent call last):
>   File "<string>", line 1, in ?
> ImportError: /usr/lib/python2.4/lib-dynload/cPickle.so: undefined
> symbol: PyUnicodeUCS4_AsUTF8String
> 
> The Python 2.4.1 installation was built from source.
> 
> Anyone having a clue? Thanks in advance.

Yes - unfortunately binary extensions have to be rebuilt if you chose a
different unicode representation - ucs4 instead of ucs2. Which you most
probably didn't do on purpose. So there are two options here:

 - rebuilt python, with ucs2 as internal representation (configure option)
 - rebuilt the extensions.


-- 
Regards,

Diez B. Roggisch


From fredrik at pythonware.com  Wed Apr 13 05:07:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 11:07:13 +0200
Subject: A command in a String ?
References: <pan.2005.04.13.08.25.53.59804@optushome.com.au><mailman.1820.1113381375.1799.python-list@python.org>
	<pan.2005.04.13.08.52.50.894039@optushome.com.au>
Message-ID: <d3ina1$tlu$1@sea.gmane.org>

Peter Moscatt wrote:

>>     strings = "string1", "string2", "string3"
>>     fm = OptionMenu(root, xx, *strings)
>
> Thanks for the help on this.  Yea the 'exec' did the trick.
> The second example just placed all the strings in one option button.

did you include the asterisk?  if you remove that, you get one option.  if you
include it, you get three options.

</F> 





From beliavsky at aol.com  Thu Apr 21 22:06:41 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 21 Apr 2005 19:06:41 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>
	<1114109221.149346.64850@z14g2000cwz.googlegroups.com>
Message-ID: <1114135601.328421.165760@z14g2000cwz.googlegroups.com>


Dan Bishop wrote:
> Antoon Pardon wrote:

<snip>

> > Like users have a choice in how long they make a list, they
> > should have a choice where the indexes start. (And that
> > shouldn't be limited to 0 and 1).
>
> Suppose you could.  Then what should
>
> ([3, 1, 4] indexbase 0) + ([1, 5, 9] indexbase 4)
>
> equal?

Assuming the + sign means concatenate (as it does for Python lists)
rather than add (as it does for Numeric or Numarray arrays), it would
be

([3,1,4,1,5,9] indexbase 0)

since 0 would still be the default indexbase. If the user wanted a
1-based list as a result, he would use an expression such as

(([3, 1, 4] indexbase 0) + ([1, 5, 9] indexbase 4) indexbase 1)

If + means add, the result would be

([4,6,13] indexbase 0) .

Adding arrays makes sense if they have the same number of elements --
they do not need to have the same indices.

I rarely see problems caused by flexible lower array bounds mentioned
in comp.lang.fortran .



From ml at fgranger.com  Thu Apr 21 16:19:11 2005
From: ml at fgranger.com (Fran=?ISO-8859-1?B?5w==?=ois Granger)
Date: Thu, 21 Apr 2005 22:19:11 +0200
Subject: recording data between [ and ]
In-Reply-To: <d48cpb$hij$1@solaris.cc.vt.edu>
Message-ID: <BE8DD75F.49146%ml@fgranger.com>

Le 21/04/05 16:19, ??rbt?? <rbt at athop1.ath.vt.edu> a ?crit?:

> Peter Hansen wrote:
>> rbt wrote:
>> 
>>> Output from 'netstat -b' on a win2003 server will show what binary is
>>> responsible for the connection. For example, it may list something
>>> like this along with other connection specific data:
>>> 
>>> [lsass.exe]
>>> [System]
>>> [firefox.exe]
>>> [iexplorer.exe]
>>> 
>>> How might I process the output so that anything within brackets is
>>> recorded to a log file of my own making? I know how to parse and
>>> record things to a file, I don't know how to look make '[' and ']'
>>> appear as special characters so that I can record what's between them.
>> 
>> 
>> Does this help?
>> 
>>>>> import re
>>>>> 
>>>>> s = '''stuff   [lsass.exe]
>> ... [System]  more stuff
>> ... xxxxx [firefox.exe] ......
>> ... '''
>>>>> 
>>>>> re.findall(r'\[([^]]*)\]', s)
>> ['lsass.exe', 'System', 'firefox.exe']
> 
> Yes, it does... may take me a few minutes to get my head around it
> though. Why do re's have to be so arcane and complicated... especially
> in Python?

Items = s.split('[')
For item in items:
    end =  item.find(']')
    label = item[:end]

Not tested, ugly and slow, but may be more understandable

-- 
Convert from markup to markup:
http://fgranger.net1.nerim.net/mtom/



From miki.tebeka at zoran.com  Wed Apr  6 01:46:11 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Wed, 6 Apr 2005 08:46:11 +0300
Subject: cross platform printing
In-Reply-To: <0hx4e.3479$3O2.2184@trnddc01>
References: <0hx4e.3479$3O2.2184@trnddc01>
Message-ID: <20050406054611.GC876@zoran.com>

Hello David,

> "Alan Isaac" <aisaac0 at verizon.net> wrote in message
> news:_A34e.2207$1r6.248 at trnddc02...
> > I'd like to try personal financial management using Python.
> > I just found PyCheckbook, but it does not support check printing.
> > Is there a Python check printing application kicking around?
wxPython is a cross platfom UI framework which has printing support.
Maybe you can cook something.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From tjreedy at udel.edu  Tue Apr 26 13:15:00 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 26 Apr 2005 13:15:00 -0400
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net><mailman.2498.1114482620.1799.python-list@python.org>
	<7Ujbe.647694$w62.444038@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <d4lskp$veq$1@sea.gmane.org>


"Charles Krug" <cdkrug at worldnet.att.net> wrote in message 
news:7Ujbe.647694$w62.444038 at bgtnsc05-news.ops.worldnet.att.net...
> Both of these techniques look promising here.

Here a third, the closure approach (obviously not directly tested):

def func_with_static(datalist):
    def real_func(otherargs):
         <code that uses datalist>
    return real_func

func1 = func_with_static([.1, 99, 1e-10,...])

If needed, real_func can *modify* (but not *rebind*) datalist.
Unlike the attribute approach, but like the class approach, you can 
simultaneously have have multiple closures with different static data

func2 = func_with_static([.2, 152, 1e-9, ...])

Terry J. Reedy





From claudio.grondi at freenet.de  Tue Apr 19 17:17:08 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 19 Apr 2005 21:17:08 -0000
Subject: Name/ID of removable Media: how?
References: <d42lho$fbf$1@news.mch.sbs.de> <42650A59.3DF3C6DE@pauahtun.org>
	<mailman.2109.1113924702.1799.python-list@python.org>
Message-ID: <3cl3paF6m7kf4U1@individual.net>

Maybe the function below can help?
I suppose WMI returns same values as FSO (File System Object):

def  strDriveHexSerialNumberFromFSOintRetVal(intDriveSerialNumberByFSO):
  """Supplied with an integer representing a drive serial number returns the
  number in same format as \>dir command does (i.e. ####-####)."""
  # The value of axDrive.SerialNumber property (an int or float number) can
be
  # negative, so to get always a positive number as listed by e.g. \>dir
  # command it is necessary to apply a workaround:
  if(intDriveSerialNumberByFSO < 0):
    # dec 4294967295 == hex FFFFFFFF, dec 4294967296 == hex 100000000
    intDriveSerialNumber = 4294967296L + intDriveSerialNumberByFSO
  else:
    intDriveSerialNumber = intDriveSerialNumberByFSO
  #:if/else
  strHexSerialNumber = "%08X"%intDriveSerialNumber
  strHexSerialNumber = strHexSerialNumber[:4]+"-"+strHexSerialNumber[4:]
  return strHexSerialNumber
#:def  strDriveHexSerialNumberFromFSOintRetVal(intDriveSerialNumberByFSO)

In your case
strDriveHexSerialNumberFromFSOintRetVal(-793919769):
gives:
D0AD-BEE7

Claudio

"Ivan Van Laningham" <ivanlan at pauahtun.org> schrieb im Newsbeitrag
news:mailman.2109.1113924702.1799.python-list at python.org...
> Hi All--
> Tim's wmi stuff looked interesting, so I tried it out, and now I have a
> question.
>
>
> -----
> #!/usr/bin/python
>
> import wmi
> import win32api
>
>
> c=wmi.WMI()
> for i in c.Win32_CDROMDrive():
>     v=i.VolumeSerialNumber
>     print "WMI serial",v,long(v,0x10)
>
> vn,sn,ln,flg,fstype=win32api.GetVolumeInformation("d:\\")
> print "win32api serial",sn,long(sn)
> ----
>
> The output from the above script (drive d contains cd) is:
>
> WMI serial D0ADBEE7 3501047527
>
> win32api serial -793919769 -793919769
>
>
> What's the difference between the two serial numbers?  WMI is returning
> a long converted to a hex repr string, while win32api is returning an
> int (type(sn) is <type 'int'>), & converting to hex bears no resemblance
> to what WMI shows.  What am I missing?
>
> Metta,
> Ivan
> ----------------------------------------------
> Ivan Van Laningham
> God N Locomotive Works
> http://www.andi-holmes.com/
> http://www.foretec.com/python/workshops/1998-11/proceedings.html
> Army Signal Corps:  Cu Chi, Class of '70
> Author:  Teach Yourself Python in 24 Hours




From m at m.com  Wed Apr 27 05:06:51 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 17:06:51 +0800
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
Message-ID: <426f562f$1_3@rain.i-cable.com>

Thanks all of you guys, I found that python newsgroup is of wealthy
knowledge:

> If you would like to obfuscate your code (disguise it) without an
> executable you can try pyobfuscate as well.
>
> Harlin Seritt
>

Yes, I want more options. Since the python doc mentioned py2exe only, and it
is difficult to understand how it work.(may be you guys know C and make
file, but I am still foolish here...)

> It is generally not very easy or straight-forward.
> For now, you can use pyfreeze to snap the application.....
> If your application does not use any C modules, you can try to use
> Jython instead.
>
> Cheers
> Maurice

If using Jython to complie, is the end-user need JRE instead of Python
installed, or need both of them?

> I don't know the exact details, but try using the compiled Python
> scripts (bytecode). I believe they are semi-optimized and platform
> independent. They are the .pyc and .pyo files generated when the script
> is run.
>
>ryan at ryankaskel

Is that means a .py convert to .pyc or .pyo, without the need of "make file"
as using py2exe?




From steve.horsley at gmail.com  Mon Apr 18 16:21:36 2005
From: steve.horsley at gmail.com (Steve Horsley)
Date: Mon, 18 Apr 2005 21:21:36 +0100
Subject: Can a function be called within a function ?
In-Reply-To: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
References: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
Message-ID: <d414q6$ofv$1@news.freedom2surf.net>

Peter Moscatt wrote:
> Is it possible to write code and allow a function to be called within
> another like I have shown below ?
> 
> Pete
> 
> 
> 
> def populatelist():
>         f=open(_globals.appath + "dxcluster.svr","r")
>         while true:
>                 text = f.readline()
>                 if text =="":
>                         break
>                 _list.append(string.strip(text))        
>         f.close()
>         
>         
> def serversettings():
>         servers.main(root)
>         if _globals.refresh=="yes":
>                 populatelist()   <----------------------- calling function above.
> 
> 

Yes. It is perfectly normal. As programs get more complex,  you 
find methods calling methods calling methods. And as Kent pointed 
out, you are already callin methods from withon methods by 
calling the likes of open() and close().

Beware of creating loops - methods that call themselves, eitehr 
directly or by calling other methods that end up calling the 
original method. This can be done with care to make sure that at 
some point a method is sure to return without calling onwards, 
usually by having the problem simplified every time, but you 
should avoid this kind of thing for now. It's called recursion. 
An example would be in calculating x to the power of y. x^y can 
be calculated by working out x * x^(y-1), but x^(y-1) is x * 
x^(y-2) etc. But you canbe sure this ends when we finally come to 
work out x^1 which is x, and this breaks the loop. If that makes 
sense.

Steve


From kerny404 at gmail.com  Wed Apr 27 16:17:07 2005
From: kerny404 at gmail.com (andrea)
Date: Wed, 27 Apr 2005 22:17:07 +0200
Subject: creating very small types
Message-ID: <426FF343.4040008@gmail.com>

I was thinking to code the huffman algorithm and trying to compress
something with it, but I've got a problem.
How can I represent for example a char with only 3 bits??
I had a look to the compression modules but I can't understand them much...

Thank you very much
Any good link would be appreciated of course :)


From R.Brodie at rl.ac.uk  Tue Apr 19 09:03:07 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 19 Apr 2005 14:03:07 +0100
Subject: xmlrpclib and binary data as normal parameter strings
References: <svlacnvhrov.fsf@dresden.uio.no>
Message-ID: <d42vib$2ar$1@blackmamba.itd.rl.ac.uk>


"Rune Froysa" <rune.froysa at usit.uio.no> wrote in message news:svlacnvhrov.fsf at dresden.uio.no...

> From http://www.xmlrpc.com/spec ::
>   Any characters are allowed in a string except < and &, which are
>   encoded as &lt; and &amp;. A string can be used to encode binary
>   data.

the XMLRPC specification is worded pretty loosely. Obviously characters
forbidden in XML will be problematic.

> From http://www.w3.org/TR/2004/REC-xml11-20040204/#dt-character ::

That's XML 1.1; it's very rarely used in practice. Can XMLRPC use XML 1.1?
In principle, undefined, as far as I know. In practice, not in Python anyway.




From mwm at mired.org  Sat Apr 23 18:15:47 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 23 Apr 2005 17:15:47 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
Message-ID: <86br85rvfw.fsf@guru.mired.org>

"Simon John" <simoninusa2001 at yahoo.co.uk> writes:

> I still love Perl, it's a bit of an art form, as "there's more than one
> way to do it", whereas Python usually only allows one way to do it,
> which may or may not be a better mantra....

The Python mantra leads to 1) less programmer overhead, and 2) faster
improvements in the language.

To be a Perl expert, you have to know which of the many ways to do
various things is the fasted under what conditions. Python programmers
seldom have to worry about that - there's usually only one [obvious]
way to do things, so you just do it that way.

Having only one obvious way to do things means developers only have to
worry about impact on that way when making improvements, which will
speed them up.

The problem these days is that there are now multiple ways to do a
variety of things, because we have the "new, pythonic" way and the
"old, backwards-compatible way". So it's no longer clear which is the
fastest - and in the case of generators versus list comprehensions,
it's not clear which you should be using. To bad.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From dan at dontspammecauseidontlikit.com  Mon Apr 11 23:47:03 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Tue, 12 Apr 2005 11:47:03 +0800
Subject: Can't Stop Process On Windows
Message-ID: <lifm51hf5mhgl5sqf07a0uv8l0co0deu9h@4ax.com>


I have a python script running under Windows XP that I need to
terminate from the keyboard.  A control-c works fine under Linux, but
not under Windows.  I'm pretty sure that the culprit is 'select' that
I'm using to multiplex socket i/o, which seems to be blocking the
keyboard interrupt.  Is there some way around this?

Dan



From cam.ac.uk at mh391.invalid  Thu Apr 28 05:46:29 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 28 Apr 2005 10:46:29 +0100
Subject: dynamically generating temporary files through python/cgi
In-Reply-To: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
References: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
Message-ID: <d4qbdn$hia$1@gemini.csx.cam.ac.uk>

poisondart wrote:

> I've seen it on certain websites that will
> generate a file under certain parameters (through forms) that will
> dissapear (i.e. delete itself) after a specified amount of time...
> 
> Is there a group of library functions that allow this?

No.

The easiest way, in my mind would be to store the files in a directory 
according to the hour they were requested, for example, a file generated 
between 2 p.m. and 3 p.m. today:

http://www.example.com/temp/20050428T14/d41d8cd98f00b204e9800998ecf8427e.html

Then you can have a cron job that runs every hour that deletes 
everything in the temp directory generated 24 hours ago.
-- 
Michael Hoffman


From radam2 at tampabay.rr.com  Fri Apr  1 13:30:56 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Fri, 01 Apr 2005 18:30:56 GMT
Subject: Decorater inside a function? Is there a way?
Message-ID: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>


I'm trying to figure out how to test function arguments by adding a
decorator.

    @decorate
    def func( x):
        # do something
    return x

This allows me to wrap and replace the arguments with my own, but not
get the arguments that the original function received.

To do that I would need to put the decorator inside the function.

    def func( x):
        @decorate
		# doc something
	return x

Then I could use @decorators to check the function input for
condition, ranges, and or types.

Is there a equivalent way to do that?

Also can I use @decorate with assert?


Ron



From __peter__ at web.de  Fri Apr  8 10:50:19 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 08 Apr 2005 16:50:19 +0200
Subject: unknown encoding problem
References: <d361u0$152$1@news2.rz.uni-karlsruhe.de>
Message-ID: <d365n4$3c7$01$1@news.t-online.com>

Uwe Mayer wrote:

> I need to read in a text file which seems to be stored in some unknown
> encoding. Opening and reading the files content returns:
> 
>>>> f.read()
> '\x00 \x00 \x00<\x00l\x00o\x00g\x00E\x00n\x00t\x00r\x00y\x00...
> 
> Each character has a \x00 prepended to it. I suspect its some kind of
> unicode - how do I get rid of it?

Intermittent '\x00' bytes are a indeed strong evidence for unicode. Use
codecs.open() to access the data in such a file:

>>> import codecs
>>> f = codecs.open(filename, "r", "UTF-16-BE")
>>> f.read()
u'  <logEntry'

If you don't want unicode, convert back to str:

>>> _.encode("latin1")
'  <logEntry'

Note that the last step may fail if the file contains characters not
available in the string encoding you specify.

Peter


From magoldfish at gmail.com  Sat Apr  2 23:44:11 2005
From: magoldfish at gmail.com (Marcus Goldfish)
Date: Sat, 2 Apr 2005 23:44:11 -0500
Subject: Finding attributes in a list
In-Reply-To: <4249f2d0.22628407@news.oz.net>
References: <1112101524.879186.260630@o13g2000cwo.googlegroups.com>
	<1112116787.160723.219160@l41g2000cwc.googlegroups.com>
	<TtWdnTsfY9roA9TfRVn-vw@comcast.com> <4249f2d0.22628407@news.oz.net>
Message-ID: <5e183f3d050402204426e9099f@mail.gmail.com>

> class Player(object):
>    def __init__(self, **kw): self.__dict__.update(kw)
>    def __repr__(self): return '<Player %s>'%getattr(self, 'name', '(anonymous)')
>
> import operator
> [p.name for p in sorted(players, key=operator.attrgetter('attacking'), reverse=True)]

Just happened to read this thread and wanted to say this is a neat
little example-- thank you!  I have a couple of followup questions.

   (1) Is there a performance penalty for using key=operator.attrgetter()?
   (2) The Player class looks like a nice model for a data table when one
        wants to sort by arbitrary column.  Would you agree?
   (3) Suppose one wished to construct a player list from a collection of
        attribute lists, e.g.,

                names = ['bob', 'sam', 'linda']
                attack = [7, 5, 8]
                defense = [6, 8, 6]
                # construct players list here

       Can you recommend an efficient way to construct the player list?

Thanks!
Marcus


From sir.shz at gmail.com  Mon Apr 18 15:19:37 2005
From: sir.shz at gmail.com (sir.shz)
Date: 18 Apr 2005 12:19:37 -0700
Subject: Twisted for online games
Message-ID: <1113851977.195434.78980@l41g2000cwc.googlegroups.com>

Hi, I'm just starting to play with Twisted, and planning to use it for
sone online games (e.g., casino games, etc.), have people done that
before, are there any pointers? Thanks.



From Gerald.Klix at klix.ch  Tue Apr 12 09:37:14 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Tue, 12 Apr 2005 15:37:14 +0200
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113311618.838281.205380@l41g2000cwc.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>	<op.so37qgvcqfv3if@localhost>
	<1113311618.838281.205380@l41g2000cwc.googlegroups.com>
Message-ID: <425BCF0A.8060900@klix.ch>



Kanthi Kiran Narisetti schrieb:
> Hi All,
> 
> Thank You for your suggestions....I request you all to eloborate the
> Uses(In Practical) for systems administrator.Some of my questions
> regarding the same follows.
> 
> 1)Can i build web applications in Python ? If so how. I am planning to
> build a web application for intranet use which deals with workflow of
> Internal office communication.
Yes, you can.
There are far too many options, to be listed here:
Here are just 3 pointers:
http://www.zope.org/
http://www.cherrypy.org/
http://www.webwareforpython.org/
http://skunkweb.sourceforge.net/

> 
> 2)Which is best opensource database to be used with Python ?
It's hard to say. It depends on our taste and the type of your application.
There is a python standard for a relation DB-API
and there are som object relational adapters, like:
http://python-dbo.sourceforge.net/
http://sqlobject.org/
http://skunkweb.sourceforge.net/PyDO/
http://dustman.net/andy/python/SQLDict

And, of course, there is ZODB the object oriented DB below Zope:
http://www.zope.org/Products/ZODB3.3


> 
> 3)When i write a remote execution script in python is it required that
> python should be installed in remote system.
No.
Using xmlrpc the server and may be written in any programming language.
xmlrpc is include din the standard libray.
Other remote execution systems use CORBA or do things upon their own:
http://pyro.sourceforge.net/

It is also possible to package python applications in an executable using:
http://starship.python.net/crew/theller/py2exe/
http://starship.python.net/crew/atuining/cx_Freeze/
or the Freeze utility delivered with the python standard distribution.

> 
> 4)I heard about Perl/CGI and that CGI application done by python
> too.....Is CGI still valid when PHP has taken over the WebApplication
> Development, Dominating.
No it's rather slow, but widley used. There is a mod_python for Apache
which is used be some of the web application frameworks mentioned above.
> 
> Sorry if these questions are out of this group , but answers to these ?
> will help me a lot.
The are perfectly valid.

HTH,
Gerald

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634



From rkern at ucsd.edu  Sun Apr 17 22:28:31 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 17 Apr 2005 19:28:31 -0700
Subject: python.exe on Mac OS X!?
In-Reply-To: <1113786892.458768.95420@z14g2000cwz.googlegroups.com>
References: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>	<mailman.2033.1113780805.1799.python-list@python.org>
	<1113786892.458768.95420@z14g2000cwz.googlegroups.com>
Message-ID: <d3v5p3$n0r$1@sea.gmane.org>

Rodney Maxwell wrote:
>>>executable produced was 'python.exe'. Can someone tell me whether
> 
> this
> 
>>>is a bug, feature, or UserError?
> 
> 
>>I'm not sure. Why don't you grab the binary?
> 
> 
>>http://www.python.org/ftp/python/2.4.1/MacPython-OSX-2.4.1-1 .dmg
> 
> 
> Because I need to keep multiple versions of Python on this machine, and
> as far as I can tell the binary installer overwrites the default
> installed version.
> I could be wrong.

You are wrong. It installs alongside.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From dwelch at vcd.hp.com  Thu Apr 21 12:34:54 2005
From: dwelch at vcd.hp.com (djw)
Date: Thu, 21 Apr 2005 09:34:54 -0700
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <TIOdnQkhrMfcTPrfRVn-uA@telcove.net>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
	<TIOdnQkhrMfcTPrfRVn-uA@telcove.net>
Message-ID: <d48ktk$4ov$1@news.vcd.hp.com>

Thomas Bartkus wrote:
> "codecraig" <codecraig at gmail.com> wrote in message
> news:1114098472.768814.281750 at g14g2000cwa.googlegroups.com...
> <snip>
> 
>>Well so far from what I have found, Perl is faster than Python for
>>RegEx, although perl is harder to read.
> 
> 
> Yawn
> 
> How about Python being easier to *write*?
> 
> It never ceases to amaze me.  It takes days, weeks, months, sometimes even
> years to write significantly useful software.  And yet so many seem to think
> it is worthy to bother over the seconds that might be saved at execution
> time.
> 
> If one were to achieve a mere percentage point or two in improving the
> "write" efficiency of software - think how much more the world gains in
> software quality and quantity.  How about man hours saved?  Why does anyone
> still waste so much angst over execution speed?
> 
> I doubt the total execution time for all the RegEx queries you ever ran took
> as much time as you just wasted on your little experiment.
> Thomas Bartkus
> 
> 
While I agree with (most of) your points, one should not overlook the 
fact that there are cases when performance does matter (huge datasets 
maybe?). Since the OP didn't indicate why performance was important to 
him/her, one cannot assume that its not a valid concern.

-Don


From steven.bethard at gmail.com  Thu Apr 28 22:08:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 28 Apr 2005 20:08:09 -0600
Subject: Working with method-wrapper objects
In-Reply-To: <mailman.4.1114734744.14961.python-list@python.org>
References: <1830947848@web.de>
	<mailman.4.1114734744.14961.python-list@python.org>
Message-ID: <SPKdnbobAtSYCuzfRVn-hg@comcast.com>

Dr. Peer Griebel wrote:
>> Why has [].__str__ a different type than object.__str__?
>> Why is object.__str__ a routine while object().__str__ not?

Well, I don't know why inspect.isroutine does what it does, but if you 
really need to detect these, can you do something like:

py> MethodWrapperType = type(object().__str__)
py> type([].__str__) == MethodWrapperType
True

This is basically all the types module does for similar types.  (Take a 
look -- it's written in Python.)

> Some more investigation shows that also the module "types" is not 
> universally usable. E.g. InstanceType is only usabel for instances of 
> old classes. How do I test for instances of new classes?

isinstance(obj, object)

All new-style classes are subclasses of object (even type!)

STeVe


From bokr at oz.net  Wed Apr 27 14:57:45 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 27 Apr 2005 18:57:45 GMT
Subject: suggestions on how to do this
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
Message-ID: <426fe037.64166596@news.oz.net>

On Wed, 27 Apr 2005 11:34:53 GMT, "chris" <cf_1957 at hotmail.com> wrote:

>The problem I have is as follows:
>
>I have a recursive function b(k)
>
>b(k) = -(A/k**2)*(b(k-2) - b(k-5))
>k<0, b(k)=0
>k=0, b(k)=1
>k=1, b(k)=0
>
>eg. b(2) = -A/4
>      b(3) = 0
>      b(4) = A**2/64
>
>note that as k increases b(k) can itself be a sum of terms in powers of A
>rather than a single power of A in the examples above.
>
>Summing all terms and equating to zero gives:
>
>F= sum b(k) = 0 for all k = 0, infinity
>
>When this is expanded I get a polynomial F(A). I want to determine the
>coefficients of the polynomial so that I can find the roots of the function
>F up to a specified order of A.
>
>
>I have yet to code this but I was hoping for some ideas on how to do this
>reasonably.
>
>I figure I can compute each b(k) and store the numeric value(s) and
>associated powers of A. Then collect coefficients for like powers of A.
>Finally I have a set of polynomial coefficients in A which I can pass to
>scipy.base.roots()
>
>Any suggestions on how I might do this efficiently? I have no doubt I can
>get this done with brute force, but I would prefer to explore more elegant
>means which I look to the masters for.
>

Does this look right?

b(-5) -> 0
b(-4) -> 0
b(-3) -> 0
b(-2) -> 0
b(-1) -> 0
 b(0) -> 0
 b(1) -> 0
 b(2) -> -A/4
 b(3) -> 0
 b(4) -> A**2/64
 b(5) -> A/25
 b(6) -> -A**3/2304
 b(7) -> -29*A**2/4900
 b(8) -> A**4/147456
 b(9) -> 563*A**3/2116800
b(10) -> A**2/2500 -A**5/14745600
b(11) -> -5927*A**4/1024531200
b(12) -> -43*A**3/980000 +A**6/2123366400
b(13) -> 824003*A**5/11081329459200
b(14) -> 16397*A**4/10372320000 -A**7/416179814400
b(15) -> A**3/562500 -1260403*A**6/1994639302656000

Regards,
Bengt Richter


From reinhold-birkenfeld-nospam at wolke7.net  Fri Apr 22 09:42:41 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Fri, 22 Apr 2005 15:42:41 +0200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <roy-41B7B8.22172521042005@reader1.panix.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
	<3cr2caF6locm6U1@individual.net>
	<roy-41B7B8.22172521042005@reader1.panix.com>
Message-ID: <3csdegF6p6jpnU1@individual.net>

Roy Smith wrote:

> import types
> 
> class slicableDict (dict):
>     def __getitem__ (self, index):
>         if type (index) == types.SliceType:
>             d2 = slicableDict()
>             for key in self.keys():
>                 if key >= index.start and key < index.stop:
>                     d2[key] = self[key]
>             return d2
>         else:
>             return dict.__getitem__ (self, index)
[...]

> Roy-Smiths-Computer:play$ ./slice.py
> {'oysters': 4, 'hen': 1, 'porpoises': 5, 'geese': 3, 'ducks': 2}
> {'hen': 1, 'geese': 3, 'ducks': 2}
> 
> I defined d[x:y] as returning a new dictionary which contains those items 
> from the original whose keys are in the range x <= key < y.  I'm not sure 
> this is terribly useful but it's a neat demonstration of just how simple 
> Python makes it to do stuff like this.  I can't imagine how much work it 
> would be to add a similar functionality to something like C++ multimap.

Other possibility, probably faster when almost all keys in the range are in
the dictionary:

class sdict(dict):
    def __getitem__(self, index):
        if isinstance(index, slice):
            d = {}
            for key in xrange(slice.start, slice.stop, slice.step):
                if key in self:
                    d[key] = self[key]
            return d
        else:
            return dict.__getitem__(self, index)

Reinhold


From facundobatista at gmail.com  Fri Apr  1 11:21:48 2005
From: facundobatista at gmail.com (Facundo Batista)
Date: Fri, 1 Apr 2005 13:21:48 -0300
Subject: Combining digit in a list to make an integer
In-Reply-To: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>
References: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>
Message-ID: <e04bdf3105040108217c6c7d88@mail.gmail.com>

On 1 Apr 2005 03:21:12 -0800, Harlin Seritt <harlinseritt at yahoo.com> wrote:

> num1 = ['1', '4', '5']
> 
> How can I combine the elements in num1 to produce an integer 145?

>>> num1 = ['1', '4', '5']
>>> int(''.join(num1))
145

.    Facundo

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


From rphillips at engineer.co.summit.oh.us  Wed Apr 27 07:43:25 2005
From: rphillips at engineer.co.summit.oh.us (paron)
Date: 27 Apr 2005 04:43:25 -0700
Subject: Python, Perl & PDF files
In-Reply-To: <d4mme5$2ej$1@solaris.cc.vt.edu>
References: <d4ir0v$fed$1@solaris.cc.vt.edu><d4j91s$bfp$1@solaris.cc.vt.edu>
	<tsd2k2-ed4.ln1@lairds.us> <d4m9hl$8br$1@solaris.cc.vt.edu>
	<diu2k2-6l3.ln1@lairds.us> <d4mme5$2ej$1@solaris.cc.vt.edu>
Message-ID: <1114602205.058191.315490@g14g2000cwa.googlegroups.com>

Hopefully, Adobe will choose to support SVG as a response to
Microsoft's "Metro", and take us all off the hook with respect to
cracking open their proprietary format.



From drjonfox at gmail.com  Mon Apr 11 00:37:09 2005
From: drjonfox at gmail.com (drjonfox at gmail.com)
Date: 10 Apr 2005 21:37:09 -0700
Subject: PIGIP Meeting -- Python Interest Group In Princeton
Message-ID: <1113194229.477902.316460@f14g2000cwb.googlegroups.com>

Python Interest Group In Princeton (PIGIP)

PIG/IP will hold its fourth meeting on Tuesday April 12, 2005 at the
Lawrenceville Library. Unfortunately, the Lawrenceville library has no
free rooms at the usual 3rd Wednesday time. We will be reviewing more
of the Python Tutorial (we last left off finishing the chapter about
exceptions, so the next subject will be Classes) and then open
discussion about Python will be encouraged.

About PIGIP

The Python Interest Group In Princeton is a Central New Jersey
discussion and educational group for the Python computer language.

PIGIP is a forum for open discussion about the Python computer language
and source of exchange for people at different levels of learning about
Python. Meetings are monthly (generally on the third Wednesday) and are
open to the public.

You can learn more about PIGIP at the http://www.pigip.org webpage.



From stealthwang at gmail.com  Sat Apr  9 02:35:57 2005
From: stealthwang at gmail.com (lotmr)
Date: 8 Apr 2005 23:35:57 -0700
Subject: Python/wxPython Reducing memory usage.
Message-ID: <1113028557.757987.146950@g14g2000cwa.googlegroups.com>

I have previously posted a simple app I am working on, and while I love
python and wxWindows, after checking the memory usage on such a simple
app (system try application launcher) I see that it climbs to over
17mb! I have reduced all my imports to the bare workable minimum and
that just gets it under 17mb. Is there any way that I could compile or
optimize the my program and/or its memory usage?
(Note: I don't have a problem with making this program win32 specific,
as it already is only win32)


CODE:
#this section broken down soley for readability, normally one line
from wxPython.wx import wxMessageDialog,wxFrame,wxMenu,
wxBitmap,wxOK,wxID_ANY,wxID_EXIT,wxID_ABOUT,
wxBITMAP_TYPE_ICO,wxBITMAP_TYPE_PNG,wxMenuItem,
wxPySimpleApp,wxTaskBarIcon,wxIcon,EVT_TASKBAR_RIGHT_UP,EVT_MENU
#end

from os import startfile
from sys import exit

class MainWindow(wxFrame):
    def OnAbout (self, event):
        m = wxMessageDialog( self, " LUNCH Bar 0.1 \n"
                             " A launch bar written in Python using
wxWindows","About LUNCH", wxOK)
        m.ShowModal()
        m.Destroy
    def OnExit (self, event):
        self.tbi.Destroy()
        exit()
    def OnTrayRight (self, event):
    	self.PopupMenu(self.rhtmenu)
    def OnLaunch (self, event):
        print event.GetString()
        path = 'D:\Program Files\Mozilla Firefox\Firefox.exe'
        startfile(path)
    def __init__(self,parent,id,title):
        wxID_FIREFOX = 1117
        wxFrame.__init__(self,parent,wxID_ANY, title, size = (
200,100))
	self.tbi = wxTaskBarIcon()
	icon = wxIcon('package.ico',wxBITMAP_TYPE_ICO)
	self.tbi.SetIcon(icon, '')
        self.rhtmenu = wxMenu()
    	icon = wxBitmap(name = 'ffico.png', type = wxBITMAP_TYPE_PNG)
    	item = wxMenuItem(parentMenu = self.rhtmenu, id = wxID_FIREFOX,
text='Firefox')
    	item.SetBitmap(icon)
    	self.rhtmenu.Append(wxID_EXIT, "&Exit"," Terminate this program")
    	self.rhtmenu.Append(wxID_ABOUT, "&About"," Information about this
program")
    	self.rhtmenu.AppendSeparator()
    	self.rhtmenu.AppendItem(item)
        EVT_TASKBAR_RIGHT_UP(self.tbi, self.OnTrayRight)
        EVT_MENU(self, wxID_ABOUT, self.OnAbout)
        EVT_MENU(self, wxID_EXIT, self.OnExit)
        EVT_MENU(self, wxID_FIREFOX, self.OnLaunch)


appwin = wxPySimpleApp()
frame = MainWindow(None, -1, "Small editor")
appwin.MainLoop()



From iker at research.att.com  Wed Apr 27 16:05:21 2005
From: iker at research.att.com (Iker Arizmendi)
Date: Wed, 27 Apr 2005 20:05:21 GMT
Subject: Inheriting socket handles on Windows
Message-ID: <426FF081.5020500@research.att.com>

Hello all.

I'm trying to get a server process to do the following
on both Linux and Windows:

    1) Create a socket and bind it to some port number.
    2) Use spawnl to create other processes that will
       then listen and accept on that socket.

On Linux I've managed to do that by using command line
args to pass the FD number of the listening socket to
the spawned processes. Eg:

     # SERVER
     #
     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     s.bind(('', 9999))
     s.listen(5)
     exe = "childscript"
     fds = str(s.fileno())
     pid = os.spawnl(os.P_NOWAIT, exe, exe, fds))
     print "process spawned"
     time.sleep(5)

     # CLIENT
     # where fds was received from the parent
     #
     fds = int(sys.argv[1])
     s = socket.fromfd(fds, socket.AF_INET, socket.SOCK_STREAM)
     s.listen(5)
     print "child listening..."

However, this fails on Windows as it doesn't have the fromfd
function. Aren't WinSock handles inherited by default? And if
so, is there some other way to perform a listen()/accept() in
this case?

Regards,
Iker Arizmendi





From bokr at oz.net  Sat Apr 23 12:26:08 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 23 Apr 2005 16:26:08 GMT
Subject: a=[ lambda t: t**n for n in range(4) ]
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>
	<4269a0ea.275861307@news.oz.net>
	<1114227955.605994.162700@g14g2000cwa.googlegroups.com>
Message-ID: <426a3d7a.315941870@news.oz.net>

On 22 Apr 2005 20:45:55 -0700, "El Pitonero" <pitonero at gmail.com> wrote:

>Bengt Richter wrote:
>> I still don't know what you are asking for, but here is a toy,
>> ...
>> But why not spend some time with the tutorials, so have a few more
>cards in your deck
>> before you try to play for real? ;-)
>
>Communication problem.
Indeed.

>
>All he wanted is automatic evaluation a la spreadsheet application.
>Just like in Microsoft Excel. That's all.
>
>There are many ways for implementing the requested feature. Here are
>two:
>
>(1) Push model: use event listeners. Register dependent quantities as
>event listeners of independent quantities. When an independent quantity
>is modified, fire off the event and update the dependent quantities.
>Excel uses the push model.
This is essentially what I was demonstrating with the namespace of FunArray,
showing object attribute namespace access as perhaps _the_ 'listening" hook
of Python -- which properties and overriding base class methods with
subclass methods etc. etc. all depend on.

FunArray 'listens' for named "spreadsheet cell" assignments to its namespace,
and it "listens" for a repr access to the "spreadsheet" as a whole, presenting
its status in terms of cell names and the formula value of the last cell entered.

Not conventional, but I wanted to stay as close to the OP's proposed
example interactive log (if that was what it was, which apparently it wasn't ;-)

This does also demonstrate that if you want to "listen" for apparent
assignments to bare names, AFAIK there is no way without byte code hackery
or using a trace hook, or just doing your own eval-print loop,
which is why I suggested the cmd module as a start.

of course, you could mess with displayhook to get what the OP originally
appeared to be asking for. E.g., this toy produces an interactive log
much like the OP specified:

 >>> class DH(object):
 ...     def __init__(self):
 ...         import math
 ...         self.env = vars(math)
 ...         self.env.update(vars(__builtins__))
 ...     def evalstrex(self, s):
 ...         for name in compile(s,'','eval').co_names:
 ...             if type(self.env[name]) == str:
 ...                 self.env[name] = self.evalstrex(self.env[name])
 ...         return eval(s, self.env)
 ...     def __call__(self, o):
 ...         if type(o)==str:
 ...             self.env.update(globals())
 ...             o = self.evalstrex(o)
 ...         sys.__displayhook__(o)
 ...
 >>> import sys
 >>> sys.displayhook = DH()

Other than the quotes around the formula,

 >>> a = '[sin(x), cos(x)]'
 >>> x=0.0
 >>> a
 [0.0, 1.0]
 >>> x=1.0
 >>> a
 [0.8414709848078965, 0.54030230586813977]

looks a lot like

 """
 I'm looking for array of functions.
 Something like a=[ sin(x) , cos(x) ]

 >>> x=0.0
 >>> a
 [0, 1]
 >>> x=1.0
 >>> a
 ...

 of course it can be made by
 >>> def cratearray(x):
 ...           ~~~~
 ...           return a
 a=createarray(1.0)

 but this isn't what i am asking for. something automized.
"""

Of course, this is not what the OP _really_ wanted ;-)

But it's kind of fun. Anything you type in quotes is evaluated
using available global bindings plus the ones in the math module
and __builtins__, and it's recursive, so if a name in the quoted
formula refers to another string (which must be a valid expression),
that is evaluated, and so on. This is "pull" based on interactive
display trigger ;-)

 >>> x='pi/6'
 >>> a
 [0.49999999999999994, 0.86602540378443871]

 >>> x='pi/6'
 >>> a
 [0.49999999999999994, 0.86602540378443871]
 >>> x = 'pi/y'
 >>> y=6
 >>> a
 [0.49999999999999994, 0.86602540378443871]
 >>> y=3
 >>> a
 [0.8660254037844386, 0.50000000000000011]

The display hook passes through non-strings, so you can box a string formula to see it:

 >>> [a]
 ['[sin(x), cos(x)]']
 >>> [x]
 ['pi/y']
 >>> [y]
 [3]


You could specify your spread sheet:

 >>> a1,a2,a3=100,200,'sum([a1,a2])'
 >>> a1,a2,a3
 (100, 200, 'sum([a1,a2])')
 >>> a1
 100
 >>> a2
 200
 >>> a3
 300

;-)

>
>(2) Pull model: lazy evaluation. Have some flag on whether an
>independent quantity has been changed. When evaluating a dependent
>quantity, survey its independent quantities recursively, and update the
>cached copies whereever necessary.
>
>Of course, combination of the two approaches is possible.
>
>For Python, metaclasses and/or decorators and/or properties may help.
>
>But functional languages are a more natural territory.
>

Regards,
Bengt Richter


From aahz at pythoncraft.com  Thu Apr  7 11:11:31 2005
From: aahz at pythoncraft.com (Aahz)
Date: 7 Apr 2005 11:11:31 -0400
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com>
	<mailman.1429.1112794393.1799.python-list@python.org>
Message-ID: <d33ij3$9jj$1@panix2.panix.com>

In article <mailman.1429.1112794393.1799.python-list at python.org>,
=?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
>[Aahz]
>> [Fran?ois]
>>>
>>>Many of us are using Python today, week after week, year long.  So
>>>let's be pragmatic.  Python is what it became and now is.  Let's not
>>>define it as a memory from the past nor as a futuristic dream.
>>
>> You're free to continue using 1.5.2.  [...]
>
>Sure, of course.  Yet, our friendly argument is sliding away from was it
>originally was.  The point was about not asserting in this forum that
>Python "has only one way to do it", because this is not true anymore.
>
>The principle has been, it may be back in some distant future, but now
>it is not.

You're conflating two different things:

* Whether Python currently has only one way to do things

* Whether Python has a design goal of only one way to do things

I'll agree that Python currently has many examples of more than one way
to do things (and even Python 3.0 won't remove every example, because
anything more complicated than a Turing Machine has more than one way to
do things).  But I won't agree that Only One Way has been abandoned as a
design principle.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From max2 at fisso.casa  Tue Apr  5 13:30:47 2005
From: max2 at fisso.casa (max(01)*)
Date: Tue, 05 Apr 2005 17:30:47 GMT
Subject: redundant imports
In-Reply-To: <86zmwgx0he.fsf@guru.mired.org>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<T9OdnU9kdqI2NNffRVn-ow@powergate.ca>
	<i4V2e.1146141$35.42440149@news4.tin.it>
	<86zmwgx0he.fsf@guru.mired.org>
Message-ID: <bXz4e.739674$b5.33332279@news3.tin.it>

Mike Meyer wrote:
> "max(01)*" <max2 at fisso.casa> writes:
> 
> 
>>Peter Hansen wrote:
>>
>>>max(01)* wrote:
>>>
>>>
>>>>hi everybody.
>>>>
>>>>suppose that code-1.py imports code-2.py and code-3.py (because it
>>>>uses names from both), and that code-2.py imports code-3.py.
>>>>
>>>>if python were c, code-1.c should only *include* code-2.c, because
>>>>the latter in turns includes code-3.c.
>>>>
>>>>inclusion of modules in c is a purely preprocessing textual matter
>>>>(compilation is deferred to after the fact), i guess, so that such
>>>>things are possible. import of modules in python is a different
>>>>beast, so the "redundancy" is (i think) necessary.
>>>>
>>>>any comment/suggestion/idea?
>>>
>>>You're mixed up about this whole idea.
>>>
>>
>>that's why i am asking for advice here.
>>my concern was motivated by a (clumsy) attempt to understand the
>>difference of mechanism between the approach to modular programming in
>>a more "traditional" language (c) and python.
> 
> 
> [Names changed to be valid python module names.]
> 
> I feel I ought to point out that you don't really *have* to import the
> code_3.py in code_1.py. You can get to things code_3.py in code_1.py
> as code_2.code_3.<thing>.
> 

oh. it never occured to me. interesting i must say...

> The semantic behavior of "include" in C is the same as "from module
> import *" in python. Both cases add all the names in the included
> namespace directly to the including namespace. This usage is
> depreciated in Python, because it leads to problems figuring out where
> a specific variable came from. 

so 'import module' is to be preferred, right?

> In C, it creates a problem called "name
> space pollution". This is the case when a file1.c gets all the symbols
> for some_header.h, even though it doesn't include/need those symbols,
> because some header file1.c included needed a symbol from
> some_header.h. This is especially galling if the pollution collides
> with some_header2.h that file1.c actually needs.
> 
>      <mike

thanks a lot, mike!


From xah at xahlee.org  Sun Apr 10 03:49:32 2005
From: xah at xahlee.org (Xah Lee)
Date: 10 Apr 2005 00:49:32 -0700
Subject: EOL created by .write or .encode
In-Reply-To: <1113034010.742291.94360@o13g2000cwo.googlegroups.com>
References: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>
	<1113034010.742291.94360@o13g2000cwo.googlegroups.com>
Message-ID: <1113119372.892637.134950@f14g2000cwb.googlegroups.com>

can any GNU person or emacs coder answer this?

specifically: why does what-cursor-position give incorrect answer.

 Xah
 xah at xahlee.org
? http://xahlee.org/PageTwo_dir/more.html ?

Xah Lee wrote:
> I found the problem now. (after some  one hour debug time) Python
> didn't have problem. Emacs does.
>
> If you open a file in emacs, it will open fine regardless whether the
> EOL is ascii 10 or 13. (unix or mac) This is a nice feature. However,
> the what-cursor-position which is used to show cursor position and
the
> char's ascii code, says the EOL is ascii 10 when it is in fact ascii
> 13. Fuck the irresponsible fuckhead who is responsible for this.
>
> http://xahlee.org/UnixResource_dir/writ/responsible_license.html
>
>  Xah
>  xah at xahlee.org
> ? http://xahlee.org/
>
>
>
> Xah Lee wrote:
> > Why is that some of my files written out by
> >    outF.write(outtext.encode('utf-8'))
> > has ascii 10 as EOL, while others has ascii 13 as EOL?
> > both of these files's EOL are originally all ascii 10.
> >
> > If i remove the EOL after the tt below in the place string, then
this
> > doesn't happen.
> >
> > findreplace = [
> > (ur'</body>',
> > ur'''tt
> > </body>'''),
> > ]
> >
> > ...
> >
> >    inF = open(filePath,'rb')
> >    s=unicode(inF.read(),'utf-8')
> >    inF.close()
> >
> >    for couple in findreplace:
> >        outtext=s.replace(couple[0],couple[1])
> >        s=outtext
> >    outF = open(tempName,'wb')
> >    outF.write(outtext.encode('utf-8'))
> >    outF.close()
> >
> > thanks.
> >
> >  Xah
> >  xah at xahlee.org
> > ? http://xahlee.org/PageTwo_dir/more.html ?



From nick.graham at ieee.org  Tue Apr 12 19:01:22 2005
From: nick.graham at ieee.org (Nicholas S. Graham)
Date: Tue, 12 Apr 2005 17:01:22 -0600
Subject: Image Module
Message-ID: <Pine.BSO.4.61.0504121659140.12300@login2.srv.ualberta.ca>

I want to convert a field of 4:2:2 digital video data into a viewable 
format (.jpg or something) using the Image module.  Any suggestions??

NG



From ivanlan at pauahtun.org  Tue Apr 26 21:02:48 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 26 Apr 2005 19:02:48 -0600
Subject: Fwd: how to find the drive in python/cygwin?
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
	<3511dc7505042617524edd244a@mail.gmail.com>
Message-ID: <426EE4B8.6910F6DD@pauahtun.org>

Hi All--
Use win32api to find drives:

====cut here====
#!/usr/bin/python
# -*- coding: utf-8 -*-

import os
import os.path
import win32api
import sys


def findAllDrives():
    Drives=[]
    print "Searching for drives..."
    drives=win32api.GetLogicalDriveStrings().split(":")
    for i in drives:
        dr=i[-1].lower()
        if dr.isalpha():
            dr+=":\\"
            inf=None
            try:
                inf=win32api.GetVolumeInformation(dr)
            except:
                pass # Removable drive, not ready
		     # You'll still get the drive letter, but inf will be None
            Drives.append([dr,inf])
    return Drives

if __name__=="__main__":
    drives=findAllDrives()
    for i in drives:
        print i[0],i[1]

====cut here====

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From codecraig at gmail.com  Thu Apr 14 12:27:43 2005
From: codecraig at gmail.com (codecraig at gmail.com)
Date: 14 Apr 2005 09:27:43 -0700
Subject: py2exe + XML-RPC problem
Message-ID: <1113496062.959951.41150@l41g2000cwc.googlegroups.com>

Hi,
  I tried to take the Monkey Shell script
(http://www.sharp-ideas.net/archives/2005/03/monkey_shell_us.html) and
make it into an executable.  I am making an executable for the server
piece (monkey_shelld.py).  So my setup.py looks like this

# setup.py
from distutils.core import setup
import py2exe
import sys
import xmlrpclib
import os
import string
from SimpleXMLRPCServer import *
from ConfigParser import *
sys.argv.append("py2exe")
setup(console=[{"script": 'monkey_shelld.py'}],
data_files=["monkey_shell.conf"])

...which i think is right.  I imported the same imports as
monkey_shelld.py uses (is that necessary??)  And i execute it like...

python setup.py py2exe

Anyhow, i run the setup and get a monkey_shelld.exe.  I can run the exe
and the server runs just fine.  Then I connect to the server using the
client (monkey_shell.py), and when I execute a command,  the client
side prints out an error...

xmlrpclib.ProtocolError: <ProtocolError for 1.1.1.1:8888/RPC2: 500
Internal error

now, when i run the server script (i.e. python monkey_shelld.py),
everything works fine (i.e. i can send commands from client and get
server response), but when I try to use the server executable
(monkey_shelld.exe) I get the error (shown above) when I try to execute
a command.

Any ideas?  I am guessing that I am missing something from my setup.py.

Info that may be helpful in answering:
OS: win xp
Python ver: 2.4.1
py2exe ver: 0.5.4

Thanks!



From jalil at feghhi.com  Tue Apr 19 15:43:05 2005
From: jalil at feghhi.com (jalil at feghhi.com)
Date: 19 Apr 2005 12:43:05 -0700
Subject: Encoding Questions
In-Reply-To: <d43j6h$5ub$1@news4.zwoll1.ov.home.nl>
References: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>
	<d43j6h$5ub$1@news4.zwoll1.ov.home.nl>
Message-ID: <1113939785.827851.144980@l41g2000cwc.googlegroups.com>

thanks for the replies. As for why I set my default encoding to utf-8
in python, I did it a while ago and I think I did it because when I was
reading some strings from database in utf-8 it raised errors b/c there
were some chars it could recongnize in standard encoding. When I made
the change, the error didn't happen anymore.

Does it make sense? 

-JF



From fdreger at amiga.pl  Thu Apr 28 19:20:45 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Fri, 29 Apr 2005 01:20:45 +0200
Subject: why "import wx" doesn't work?
References: <427126ca$1_3@rain.i-cable.com>
	<VDcce.981$PA3.377@newssvr31.news.prodigy.com>
	<42715a8b$1_1@rain.i-cable.com>
Message-ID: <d4rrcn$a9l$1@nemesis.news.tpi.pl>


U?ytkownik "monkey" <m at m.com> napisa? w wiadomo?ci 
news:42715a8b$1_1 at rain.i-cable.com...
>> Which version of wxPython are you running? What do you mean by 
>> "does not
>> work"...does the import fail or is your code giving errors?
>
> It is the current new version 2.6. The error message said that the 
> class
> wxApp is not defined...

This is very good! wxApp is never defined if you use "import wx". You 
must use "wx.wxApp" instead.

If you import a module using "import anything", then all the names 
imported from the module must begin with "anything.". If you import wx 
using "import wx", then ALL the wx commands, classes and variables 
(all the names) MUST begin with 'wx.". Change them, and your program 
will work.

"from wx import *" is a special shortcut, allowing you to use all the 
names without "wx.". If you change "from something import *" to 
"import something", your code will always break, this is normal.

regards,
Filip Dreger 




From deetsNOSPAM at web.de  Sat Apr 23 11:47:16 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 23 Apr 2005 17:47:16 +0200
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
Message-ID: <d4dqm3$l1$04$1@news.t-online.com>

> php doesn't have any smell

au contraire! I've seen many code smells in PHP.

http://c2.com/cgi/wiki?CodeSmell

--  
Regards,

Diez B. Roggisch


From claudio.grondi at freenet.de  Sat Apr 16 19:52:22 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 16 Apr 2005 23:52:22 -0000
Subject: changing colors in python
References: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>
Message-ID: <3cdfpnF6mjvphU1@individual.net>

The readline module (used e.g. in IPython)
http://sourceforge.net/project/showfiles.php?group_id=82407
provides the Console.py
script and in my own version of it, the (extended)
Console() class supports any ANSI escape
sequences of the form ESC[#m and ESC[#,#m ,
making it possible to set any by console supported
text and background colors.
http://people.freenet.de/AiTI-IT/Python/Console.py

Replace the Console.py of the readline
module with my extended version and run
it as main script to see the coloured output
looking into the code to see how it comes.

Claudio
http://www.python.org/moin/ClaudioGrondi


"GujuBoy" <dirgesh at gmail.com> schrieb im Newsbeitrag
news:1113511856.510914.103960 at z14g2000cwz.googlegroups.com...
> i have a ansi.py file that i use in LINUX to change the text color to
> STDOUT when i use the "print" function...but when i move this ansi.py
> file over the windows...it does not work
>
> is there a version of ansi.py i can use for windows/linux....
>
> please help
>




From fredrik at pythonware.com  Mon Apr  4 04:23:20 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 4 Apr 2005 10:23:20 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com>
Message-ID: <d2qtdc$27j$1@sea.gmane.org>

Franz Steinh?usler wrote:

> My second question from my last post (PyQt on Python 2.4), I think, is
> a little got under (i have installed both Python 2.3 and Python 2.4)
>
> Is there any possibility under WinXP, to alterntate quickly
> (with batch file or similary) between python23 and python24.

if you want to deploy programs that depend on a specific python version,
exemaker is your friend:

    http://effbot.org/zone/exemaker.htm

</F> 





From foo.bar at freesurf.ch.invalid  Sat Apr  2 15:48:46 2005
From: foo.bar at freesurf.ch.invalid (Thomas Rast)
Date: Sat, 02 Apr 2005 22:48:46 +0200
Subject: Name of IDLE on Linux
References: <mailman.1242.1112466945.1799.python-list@python.org>
	<V7D3e.2366$44.1509@newsread1.news.atl.earthlink.net>
Message-ID: <8764z4nbv5.fsf@thomas.local>

Edward Diener <eldiener_no_spam_here at earthlink.net> writes:

> It is a pity the Python Linux binary installations do not
> create folders on the desktop or in the Gnome menu system with links
> to the Python to the documentation and a readme telling me what
> executables were installed.

Imagine they did, and the other 1392 packages (on my system) too :-)

Documentation usually resides in /usr/share/doc/<package>,
/usr/share/doc/packages/<package> or similiar.  You're on an RPM-based
system, so

$ rpm -ql <package>

lists all files belonging to that package.  You should have little
trouble spotting the documentation files there.

- Thomas

-- 
If you want to reply by mail, substitute my first and last name for
'foo' and 'bar', respectively, and remove '.invalid'.


From aubry at tls.cena.fr  Tue Apr 26 07:28:04 2005
From: aubry at tls.cena.fr (Sebastien Aubry)
Date: Tue, 26 Apr 2005 13:28:04 +0200
Subject: How to use a Tkinter widget inside a PyGtk or wxPython HMI?
Message-ID: <d4l8k4$see$1@socks.tls.cena.fr>

[This is the translation of a question issued on the fr.comp.lang.python 
newsgroup]

Hello,

I happen to use in my programs a widget based on Tkinter Canvas. It is 
Zinc (http://www.tkzinc.org), which allows to draw using transparency, 
gradients, translations, rotations, ... using OpenGL.

However, this widget depends on Tkinter, whose look I find oldy, though 
I would like to try PyGtk or wxPython.

I would like to know if there is a method for using a Tkinter widget 
inside a PyGtk or wxPython interface.

I have already seeked some information about this:

- in the same window: this seems impossible, but it might actually be 
possible! I have seen that with GTK and VTK 
(http://public.kitware.com/VTK), somebody has managed to solve such a 
problem (type "gtkvtkrenderwindow" in Google).

- in different windows: the (not so smart) idea would be to have a main 
PyGtk window, and, in the foreground, a Tkinter window without 
decorations, only containing the Tkinter-dependant widget. The events 
(resize, close...) should, of course, be synchronized.

If you have any hint, I would be happy to know more.

Regards


S?bastien Aubry


From llothar at web.de  Mon Apr 18 10:20:14 2005
From: llothar at web.de (Lothar Scholz)
Date: 18 Apr 2005 07:20:14 -0700
Subject: Can't compile with --enable-shared on MacOSX
Message-ID: <6ee58e07.0504180620.4b157ebf@posting.google.com>

Help,

i tried to generate a dynamic library from the official
Python-2.4.0.tgz on MacOSX 10.3 but when i do the

./configure --enable-shared ; make ; sudo make install

or 

./configure --enable-shared=yes ; make ; sudo make install


It links statically. It's also strange that i can't find a
libpython2.4.a in my
/usr/local/lib. It's not installed by the install command.

Also  /usr/local/bin/python24 works fine.

I get an error that TK/TCL was not found. Is this the reason, i
thought i can simply ignore this error message.


From tjreedy at udel.edu  Tue Apr 12 11:39:18 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 12 Apr 2005 11:39:18 -0400
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net><is2tmhzk.fsf@python.net><425aa0fb$0$38041$bed64819@news.gradwell.net><425AF2AB.1030401@v.loewis.de>
	<425b8948$0$38045$bed64819@news.gradwell.net>
Message-ID: <d3gptd$jni$1@sea.gmane.org>


"Michael Kearns" <michael.kearns at REMOVEsaaconsultants.com> wrote in message 
news:425b8948$0$38045$bed64819 at news.gradwell.net...
>I understand this, and it's obviously a solution. Unfortunately it defeats 
>the whole point of me 'freezing' my code in the first place.

>The main feature (for me) of the way I could use this, was to create a 
>simple Java launcher that didn't require the user to install anything 
>extra, or end up with a whole stack of unused data on their machine.

I guess I don't understand some people's determination to not have users 
install fully useable Python on their Windows machines.  Doing so seems no 
different to me than having to install (or upgrade) Shockwave, or Apple's 
Quicksomething for Windows (not used so much anymore), or RealPlayer, or 
the lastest upgrade for DirectX, or DivX, or a zip decoder, or any other 
3rd party software, to run .xxx files or specialized .exe programs.  (And I 
left out the most direct analogy of a java system.)

In other words, it seems to me that most Windows users should be familiar 
with the idea of having to install a player or platform to run something 
built on top of that player or platform.  Bundling a private Python 
interpreter with every Python script is much like bundling a private 
Shockwave player with every Schockwave script.  I think most people would 
prefer having one copy of each.

To put it another way, needing a Python interpreter to run .py files is no 
different from, for instance, needing a movie player to run .mpg files, and 
all Windows users are or need to become familiar with that general concept.

Also, I think it a bit 'anti-social' to hide usage of Python.  If all 
Python Windows programs ran with a normal, communally installed Python, 
then users would gradually get the idea that having Python installed is 
much like having Shockwave and other utility platforms installed, and that 
is is part of a 'fully loaded' Windows system to have a .py player 
installed.

If there is something about the default install of Python on Windows that 
makes it less desireable or less easy than other platforms, then maybe that 
can be fixed.  To make installation easier, maybe someone could write a 
small .exe that could be frozen with scripts or run with installers and 
that would detect the presence/absence of the needed Python version and 
offer an auto download and install if needed.

At least one thing in Python's favor is the lack of having to 'register' 
before downloading (or after installation) and the ability to redistribute 
the installer free and without special license.

Terry J. Reedy





From steve at holdenweb.com  Wed Apr 13 12:07:02 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 12:07:02 -0400
Subject: Codig style: " or """
In-Reply-To: <20050413151321.791.qmail@web61109.mail.yahoo.com>
References: <20050413151321.791.qmail@web61109.mail.yahoo.com>
Message-ID: <d3jfsf$lm1$1@sea.gmane.org>

Sara Khalatbari wrote:
> Hi!
> 
> Suppose you're writing a module & writing the
> definition of each function in that module in " or
> """.
> for example:
> a) "This function does this & that"
> or:
> b)  """This function does blah blah blah"""
> 
> What are the differences between " and """ ? 
> I'm using gedit & I wanna know a bit about coding
> style.
> 
Generally speaking """ ... """ is reserbed for multiline string constats 
and those whihc need to contain both single and double quotes - such as

"""Python's quotes are "'" and '"'"""

or
"""\
This is a multiline
string that has one newline in it."""

[Note that there is no starting newline in the second example, as I 
escaped it off with the \].

> To be very honest: I have a very strict boss who looks
> for bugs in my codes & he insists to know exactly
> which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
> my coding style on when using " or """.
> 
> Can anybody out there give me some hint?
> Can anybody tell me where to find a document on python
> coding style.
> 
> tnx,
> Sara
> 
Sara:

Show your boss

   http://python.org/peps/pep-0008.html

Be sure he understands that you are not responsible for the title :-)

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From abpillai at gmail.com  Wed Apr  6 14:26:10 2005
From: abpillai at gmail.com (Anand)
Date: 6 Apr 2005 11:26:10 -0700
Subject: Harvestman install not working
In-Reply-To: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
Message-ID: <1112811970.231676.122830@g14g2000cwa.googlegroups.com>

Hi

    Latest version of py2exe does not support the option
--force-imports anymore I think. You can edit the .bat file to remove
that option. It should work.

-Anand



From fernandomirandamuro at gmail.com  Wed Apr 13 14:58:12 2005
From: fernandomirandamuro at gmail.com (Fernando)
Date: 13 Apr 2005 11:58:12 -0700
Subject: are DLLs needed to run glade interfaces in python with Windows?
Message-ID: <9cac1d03.0504131058.451438a6@posting.google.com>

Hi,
I've a .glade file with a little interface I made. I've managed to
load it from a python script, using pyGTK, but the only way it succeed
was copying into the same directory the "libxml2.dll" and
"libglade-2.0.0.dll" files.

I think you only need to install theese as packages in Linux, but I'm
using Windows and I'm wondering if this is a must using it, or if
there are ways much cleaner that simply start dropping DLLs inside the
directory...

Thanks.


From fabio.pliger at siavr.it  Sat Apr 30 03:19:03 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Sat, 30 Apr 2005 07:19:03 GMT
Subject: [wxPython] Many wxPanel forms in 1 wxFrame
References: <d4uo3o$1ee4$1@node3.news.atman.pl>
Message-ID: <HjGce.72249$IN.1248703@twister2.libero.it>


"CYBER" <usenet at zly_adres.com> ha scritto nel messaggio
news:d4uo3o$1ee4$1 at node3.news.atman.pl...
> Is this possible to create 1 wxFrame and
> register more than 1 wxPanel in it.
> And select the one you want to show at the moment ?
>
> I'm trying to implement a multistep wizard under wxPython.
> I need to be able to hide and show windows inside my
> frame.
>
> Help :)
>

Take a look at the wx documentation about wizards... There is a good example
about doing wizards!

F.P.




From grante at visi.com  Sun Apr 24 22:03:27 2005
From: grante at visi.com (Grant Edwards)
Date: Mon, 25 Apr 2005 02:03:27 -0000
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<116nfblc10i9340@corp.supernews.com>
	<mailman.2422.1114392805.1799.python-list@python.org>
Message-ID: <116ojvf473dc16b@corp.supernews.com>

On 2005-04-25, Terry Reedy <tjreedy at udel.edu> wrote:
>>    According to the language reference,
>>
>>      An augmented assignment expression like x += 1 can be
>>      rewritten as x = x + 1 to achieve a similar, but not
>>      exactly equal effect. In the augmented version, x is only
>>      evaluated once.
>>
>>    I don't consider the two results you posted "similar".
>
> It continues
> "Also, when possible, the actual operation is performed in-place, meaning 
> that rather than creating a new object and assigning that to the target, 
> the old object is modified instead. ...Similarly, with the exception of the 
> possible in-place behavior, the binary operation performed by augmented 
> assignment is the same as the normal binary operations.
> "
> I take the behavior observed to be the exceptional in-place behavior 
> referred to.

I certainly don't see how.  Strings are immutable.  The old
object can't be modified in-place, so the "in-place" behavior
is moot.

In any case, the only difference is supposed to be whether a
new object is created or an existing object is modified.  The
two results shouldn't be completely different as shown by the
OP.  

Your quote states quite clearly that the binary operation *is
the same* whether it's spelt a = a + b or a += b.  That is
simply not true for the example we're discussing.

> But this could certainly be clearer.

I don't see how that statement has anything to do with the bug
at hand.

-- 
Grant Edwards                   grante             Yow!  Oh my GOD -- the
                                  at               SUN just fell into YANKEE
                               visi.com            STADIUM!!


From deetsNOSPAM at web.de  Mon Apr 18 19:08:29 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 19 Apr 2005 01:08:29 +0200
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<1113862997.242449.12330@l41g2000cwc.googlegroups.com>
Message-ID: <d41el2$ia7$03$1@news.t-online.com>

AdSR wrote:

>> Yes, but usually not so much in function arguments but more in
>> list-comprehensions or other places where unpacking was useful. I
> love the
>> feature - I just don't have nested enough data to use it more :)
> 
> I use tuple unpacking in its typical uses, it's one of the first
> language features I learned about. Somehow it never occurred to me that
> you could use it in function arguments this way - I only knew  f(*args,
> **kwargs) style in this context. That's what I made the whole fuss
> about...

Well, if you think about it the whole positional argument passing is nothing
more than tuple unpacking. Its like having an anonymous variable that gets
unpacked:

def foo(a,b,c = i_m_so_anonymous):
    pass


 So it's just orthogonal to have the full functionality of unpacking
available for function arguments - including the nested tuples.

-- 
Regards,

Diez B. Roggisch


From martin at v.loewis.de  Sat Apr  9 07:22:45 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 09 Apr 2005 13:22:45 +0200
Subject: changing from python2.3 to python2.4
In-Reply-To: <d35eul$kj7$1@news2.rz.uni-karlsruhe.de>
References: <d35eul$kj7$1@news2.rz.uni-karlsruhe.de>
Message-ID: <4257bb06$0$31529$9b622d9e@news.freenet.de>

Uwe Mayer wrote:
> How do you suggest dealing with this:
> - is calling /usr/bin/python2.3 in the bang-line problematic?
> - installing into both python2.3 and python2.4 
> - rebuilding (re- ./configure, make, make install) the app solves the
> problem
> 
> Whats the usual way to deal with this?

People normally often install multiple versions of Python on a machine
if they need to support many different Python applications. They then
migrate one application after another to the new Python version, and
eventually uninstall the old version.

Putting python2.3 in the bang line should work fine, so if you can
arrange to find all scripts that need to be changed, that might be
the easiest solution. For rebuilding, you probably would need to do
some testing whether everything still works fine; if it does, this
is likely what you will do in the long run either way - at some
point, on a new machine, it will be easier to recompile your application
than installing python2.3 from sources.

Regards,
Martin


From kay.schluehr at gmx.net  Mon Apr 18 01:07:39 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 17 Apr 2005 22:07:39 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<CoOdnZbRee_Mg_7fRVn-rQ@comcast.com>
Message-ID: <1113800859.317109.27720@f14g2000cwb.googlegroups.com>

Steven Bethard wrote:

> So the object of a "where" is then always an ordered dict?

Yes.

> If so, then
> I guess I like this proposal best so far.
>
> However, it does seem to have the problem that you can't have any
> additional local variables so, for example, list comprehensions are
> probably not usable...
>
> Or can you still drop the argument to "where" and just use the names
> directly?  E.g.:
>
> x = property(fget=fget, doc=doc) where:
>      doc = "I'm the 'x' property."
>      def fget(self):
>          return self.__x

I can't see why this shouldn't work?

The specifiers behind "where" are present to determine the matching
behaviour. The order of a dict is caused by different specifiers i.e. a
dict- or tuple-like specifier. If a specifier is not present only names
can be matched regardless of a sequence and this is always possible
because we still have a dict with names as keys.

What should not be possible are statements like this:

 x = property(a, b) where:
      doc = "I'm the 'x' property."
      def fget(self):
          return self.__x

because there is no rule to match doc and fget onto a and b. In this
case we would need specifiers:

 x = property(a, b)
     where **a:
        doc = "I'm the 'x' property."
     where **b:
        def fget(self):
            return self.__x

Ciao,
Kay



From fredrik at pythonware.com  Tue Apr  5 11:19:46 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 5 Apr 2005 17:19:46 +0200
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com><mailman.1279.1112602272.1799.python-list@python.org>
	<11535p0mdgqde1@corp.supernews.com>
Message-ID: <d2ua5p$s3u$1@sea.gmane.org>

"lothar" wrote:

> with respect to the documentation, the module is broken.

nope.

> the module does not necessarily deliver a "minimal length" match for a
> non-greedy pattern.

it isn't supposed to: a regular expression describes a *set* of matching
strings, and the engine is free to return any string from that set.  Python's
engine returns the *first* string it finds that belongs to the set.  if you use
a non-greedy operator, the engine will return the first non-greedy match
it finds, not the overall shortest non-greedy match.

if you don't want to understand how regular expressions work, don't use
them.

</F> 





From ola.natvig at infosense.no  Wed Apr  6 05:04:35 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Wed, 06 Apr 2005 11:04:35 +0200
Subject: Does IronPython indicate MS interest in dynamic languages?
In-Reply-To: <42539aa9.438452150@news.oz.net>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
	<mailman.1408.1112743462.1799.python-list@python.org>
	<fnqbi2-p9c.ln1@lairds.us>
	<yIadneprl6oqxc7fRVn-gw@wideopenwest.com>
	<42539aa9.438452150@news.oz.net>
Message-ID: <3alci2-rr1.ln1@pluto.i.infosense.no>

Bengt Richter wrote:
> 
> If there is to be an MSPython, how long 'til Mozilla FirePython? ;-)
> 
> Regards,
> Bengt Richter

'Reclaim your runtime'

I can't wait...

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From fallon at das.com  Fri Apr 29 12:06:03 2005
From: fallon at das.com (AKA)
Date: Fri, 29 Apr 2005 16:06:03 GMT
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
Message-ID: <LXsce.2698$zu.1067@newssvr13.news.prodigy.com>


"Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message 
news:%23ATbpqMTFHA.3980 at TK2MSFTNGP12.phx.gbl...
> MC05 wrote:
>> "sheltech" <quasara at earthlink.net> wrote in message
>> news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
>>>
>>> "MC05" <smokerdude66 at myway.com> wrote in message
>>> news:3dc8hjF6s5i2uU1 at individual.net...
>>>>
>>>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>>> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>>>>>
>>>>> 4) I doubt seriously whether God plays a guitar, since guitars are
>>>>> made by men, for men.  His Son could theoretically play a guitar. 
>>>>> Perhaps He does. Perhaps He doesn't.  Only the Father and His Holy
>>>>> Angels know.
>>>>
>>>> So then Lucifer was a wicked bass player whose sex and drugs and
>>>> rock n roll alientated the rest of the band and was fired?
>>>>
>>>>
>>>>
>>>
>>> "Fired" ....  good one
>>
>> Heh.  Can't take credit for an accident.  Your eye is better than
>> mine. :)
>
> The Devil has been fired...by God Himself.  Read the Book of Revelation in 
> the New Testament:  Satan's end is clearly outlined by the Angel Jesus 
> sent to St. John.  This end is very clear:  he will be cast alive into the 
> Lake which burns with fire and brimstone, where he will be tormented day 
> and night forever.
>
> Not only Satan and his angels will be cast into the Lake, but all those 
> who follow him and his servants.  I assure you, Satan won't be ruling 
> anyone in the Fire.  He will be in just as much torment as his followers. 
> Neither will he have any sort of job.
>
> I strongly advise you to stop making fun of things you have no 
> understanding of.  Your eternal destiny depends on the way you treat 
> others.
>
> -- 
> Donald L McDaniel
> Please reply to the original thread,
> so that the thread may be kept intact.
> ==============================
>
Just imagine if you actually had a coherent thought. 




From rbt at athop1.ath.vt.edu  Tue Apr  5 16:51:09 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 05 Apr 2005 16:51:09 -0400
Subject: Add System Path?!?
In-Reply-To: <mailman.1403.1112730254.1799.python-list@python.org>
References: <mailman.1403.1112730254.1799.python-list@python.org>
Message-ID: <d2utnu$b88$1@solaris.cc.vt.edu>

andrea_gavana at tin.it wrote:
> Hello NG,
> 
>     I have a GUI (written in wxPython) that calls some external exe files.
> Some of them requires that I add to the PATH variable 1 directory. Basically,
> the exe are located in:
> 
> /MyApp/Solvers/FirstExe
> /MyApp/Solvers/SecondExe
> 
> And so on, while the dll needed by these exe are located in:
> 
> /MyApp/MyDll
> 
> These exe files do not work if I don't set the PATH variable also to that
> adress. I know I can do it by hand (and also my users can), but I wonder
> if there is a way to do it in Python...
> 
> Thank you for all suggestions/pointers.
> 
> Andrea.
> 
> 

Check out the 'Path' value under this registry key:

"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session 
Manager\Environment"

You can import _winreg to edit it as you like. I think it's a string... 
just append your path(s) to them.

rbt


From rkern at ucsd.edu  Tue Apr 12 15:46:20 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 12 Apr 2005 12:46:20 -0700
Subject: chaco and wx 2.5....
In-Reply-To: <KAR6e.60706$zZ1.1721966@twister1.libero.it>
References: <KAR6e.60706$zZ1.1721966@twister1.libero.it>
Message-ID: <d3h8ch$7cm$1@sea.gmane.org>

Fabio Pliger wrote:
> anyone know if it's possibile to run chaco with wx 2.5.3 or grater?

No, not at this time. Enthought expects that they will have some 
"conversion days" around summertime to move their codebase to the 
soon-to-be-released wxPython 2.6.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From steve at holdenweb.com  Fri Apr  8 01:46:17 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 01:46:17 -0400
Subject: [JIM_SPAM] Microsoft supporting a .NET version of Python...
In-Reply-To: <42560469.8000104@msn.com>
References: <42560469.8000104@msn.com>
Message-ID: <42561AA9.2040601@holdenweb.com>

Jim Hargrave wrote:
> http://www.gotdotnet.com/workspaces/workspace.aspx?id=ad7acff7-ab1e-4bcb-99c0-57ac5a3a9742 
> 

You really shoud try and get out more:

   http://www.pycon.org/dc2005/talks/keynote

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bill.mill at gmail.com  Tue Apr  5 10:51:14 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Tue, 5 Apr 2005 10:51:14 -0400
Subject: change extensions
In-Reply-To: <001a01c539ed$dfc550d0$d502a8c0@JEFF>
References: <ouWdnSxD5IGTP8_fRVn-3A@powergate.ca>
	<001a01c539ed$dfc550d0$d502a8c0@JEFF>
Message-ID: <797fe3d405040507517d998772@mail.gmail.com>

On Apr 5, 2005 10:43 AM, Jeffrey Maitland <maitj at vianet.ca> wrote:
> That approach works, but so does this one.
> 
> import os, glob
> 
> input_file_list = glob.glob('*.txt')
> for in_file in input_file_list:
>     name = in_file.split('.')
>     os.rename(in_file, str(name[0]) + '.' + 'text'))
> 

you should really use in_file.splitext - your script renames
myfile.with.lots.of.dots.txt to myfile.text instead of
myfile.with.lots.of.dots.text .

If you *really* wanted to use split(), it oughta be
''.join(in_file.split('.')[:-1]) , but why not use the built-in?

Peace
Bill Mill
bill.mill at gmail.com


From bokr at oz.net  Tue Apr  5 08:36:44 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 05 Apr 2005 12:36:44 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<1112687665.297515.231430@o13g2000cwo.googlegroups.com>
Message-ID: <42526c32.357421755@news.oz.net>

On 5 Apr 2005 00:54:25 -0700, "Kay Schluehr" <kay.schluehr at gmx.net> wrote:

>Steve Holden wrote:
>
>> You have several times mentioned the possibility of a decorator
>taking
>> more than one argument, but in my understanding of decorators this
>just
>> wouldn't make sense. A decorator should (shouldn't it) take precisely
>
>> one argument (a function or a method) and return precisely one value
>(a
>> decorated function or method).
>
I agree from an English language point of view. I.e., a verber is
something that does the verbing, so a decorator ought to be the thing
that does the decorating, which is the function/callable(s) resulting
on stack from the evaluation of the @-line.

In the case of a single @deco name, the evaluation is trivial, and
the difference between the @-expression and the resulting callable
might be overlooked. Full-fledged general expressions after the '@'
are for some reason disallowed, but it is handy to allow attribute
access and calling in the syntax, so the relevant Grammar rules are:

>From the 2.4 Grammar, the key part seems to be

    decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
    decorators: decorator+
    funcdef: [decorators] 'def' NAME parameters ':' suite

and further on

    dotted_name: NAME ('.' NAME)*

So the Python Grammar's name for the @-expression is just plain "decorator"
which conflicts with my English-based reading of the word ;-/

So it appears the intent is to call the entire @-line the "decorator"
and I guess to have a name for what evaluating the @-line returns on the
stack, we could call it the "decorating callable" since it is what takes
the function parameter as its first parameter and decorates the function
and returns the decorated function.

But I don't like it, English-wise. I would rather call the @-line
the "decorator expression" and what it evaluates to the "decorator."

Can we change the grammar with s/decorator/decorator_expr/ ?

>Yes. I think this sould be fixed into the minds of the people exacly
>this way You state it:
I think we may be agreeing in principle but with different words ;-)
>
>When writing
>
>@decorator(x,y)
>def f():
>    ....
>
>not the so called "decorator" function but decorator(x,y) is the
                                           ^--(the result of evaluating)
>decorating function and decorator(x,y) is nothing but a callable object
                        ^--(the result of evaluating)
>that takes f as parameter. A little correcture of Your statement: it is
>NOT nessacary that a function or method will be returned from a
>decorator.

Yes, in fact it could even perversely be colluding with a known succeeding
decorator callable to pass info strangely, doing strange things, e.g.,

 >>> trick = ['spam', 'eggs']
 >>> def choose_name(tup):
 ...     nx, f = tup
 ...     f.func_name = trick[nx]
 ...     return f
 ...
 >>> def namedeco(nx=1):
 ...     return lambda f, nx=nx:(nx, f)
 ...
 >>> @choose_name
 ... @namedeco()
 ... def foo(): pass
 ...
 >>> foo
 <function eggs at 0x02EE8E64>
 >>> @choose_name
 ... @namedeco(0)
 ... def foo(): pass
 ...
 >>> foo
 <function spam at 0x02EE8DF4>

I.e., namedeco evaluates to the lambda as decorator function,
and that passes a perverse (nx, f) tuple on to choose_name, instead
of a normal f.

>
>def decorator(x,y):
>    def inner(func):
>        return x+y
>    return inner
>
>@decorator(1,2)
>def f():pass
>
>>>> f
>3
>
>This is perfectly valid allthough not very usefull ;)
>

Perhaps even less useful, the final decorator can return something
arbitrary, as only the name in the def matters at that point in
the execution (as a binding target name), so:

 >>> def dumbdeco(f): return 'something dumb'
 ...
 >>> @dumbdeco
 ... def foo(): pass
 ...
 >>> foo
 'something dumb'

Hm, maybe some use ...

 >>> def keydeco(name):
 ...     return lambda f: (name, f)
 ...
 >>> @keydeco('pooh_foo')
 ... def foo(): pass
 ...
 >>> @keydeco('tigger_bar')
 ... def bar(): pass
 ...
 >>> dict([foo, bar])
 {'pooh_foo': <function foo at 0x02EE8DBC>, 'tigger_bar': <function bar at 0x02EE8DF4>}

... nah ;-)


Anyway, I think a different name for what comes after the "@" and the
callable that that (very limited) expression is supposed to return
would clarify things. My conceptual model is

    @decorator_expression  # => decorator
    def decorating_target(...):
        ...

Regards,
Bengt Richter


From gsakkis at rutgers.edu  Wed Apr 27 20:07:08 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 27 Apr 2005 17:07:08 -0700
Subject: =?iso-8859-1?q?Re=3A_Good_morning_or_good_evening_depending_upon?=
	=?iso-8859-1?q?_your_location=2E_I_want_to_ask_you_the_most_import?=
	=?iso-8859-1?q?ant_question_of_your_life=2E_Your_joy_or_sorrow_for?=
	=?iso-8859-1?q?_all_eternity_depends_upon_your_answer=2E_The_quest?=
	=?iso-8859-1?q?ion_is=3A_Are_you_saved=3F_It_is_not_a_question_of_?=
	=?iso-8859-1?q?how_good_you_are=2C_nor_if_you_are_a_church_member?=
	=?iso-8859-1?q?=2C_but_are_you_saved=3F_Are_you_sure_you_will_go_t?=
	=?iso-8859-1?q?o_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST?=
	=?iso-8859-1?q?=B7151?=
In-Reply-To: <1114640110.171596.223260@g14g2000cwa.googlegroups.com>
References: <1114640110.171596.223260@g14g2000cwa.googlegroups.com>
Message-ID: <1114646828.777860.117470@o13g2000cwo.googlegroups.com>

<Please Don't Feed the Troll> wrote in message
news:2g8071h8e3np64c0tccf8053torm33p8te at 4ax.com...
> Reports to groups-abuse at google.com, abuse at aol.net, domains at aol.net,
> abuse at yahoo.com, abuse at yahoo-inc.com
>
> And do not feed the troll!

I'm afraid he's not a troll. He's just a lame spammer, doesn't need
feeding to survive...

In any case, the hell with :-/



From poisondart985 at gmail.com  Thu Apr 28 02:32:15 2005
From: poisondart985 at gmail.com (poisondart)
Date: 27 Apr 2005 23:32:15 -0700
Subject: dynamically generating temporary files through python/cgi
Message-ID: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>

Is there a way to dynamically generate temporary files (such as an
html, xml or text file) in Python?

I'm not sure if I'm explaining myself clearly as I've no clue how to
describe this mechanism. I've seen it on certain websites that will
generate a file under certain parameters (through forms) that will
dissapear (i.e. delete itself) after a specified amount of time. These
files usually have some phony string for their filenames...like it's
been md5 hashed or something.

Is there a group of library functions that allow this? I imagine that
if i manually go and allocate a bunch of timers to monitor files, it
would be really expensive in load. Or perhaps is this a client-side
mechanism?

Thanks,
- poisondart



From steve at holdenweb.com  Tue Apr  5 10:51:40 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 10:51:40 -0400
Subject: Python & MySQL
In-Reply-To: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
References: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
Message-ID: <4252A5FC.3030000@holdenweb.com>

jason.massey at gmail.com wrote:
> Hi all,
> 
> I've got a weird problem.  I was running Python 2.3 and MySQLdb and had
> everything running fine.
> 
> Cutting to the chase: After upgrading to 2.4 (and latest modules) the
> MySQLdb functions in Python can connect to the database, do queries and
> do inserts.
> 
> Or rather, it seems to do inserts.  If I just run in the Python command
> line and manually connect to the database and do an insert and then a
> query on what I just inserted the info is there.
> 
> However when I use SQLyog to look at the database the info isn't there.
>  When I close down Python, restart, reconnect and query the info isn't
> there.
> 
> Info inserted from SQLyog is persistant.
> 
> Has anyone had any problems like this before? 
> 
> thanks,
> 
> jason
> 
I suspect you are forgetting to commit your changes to the database, so 
they are being rolled back when you close your connection.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From greg at cosc.canterbury.ac.nz  Thu Apr  7 06:45:05 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 07 Apr 2005 22:45:05 +1200
Subject: Calling a Perl Module from Python ( future direction of Python)
In-Reply-To: <3bkgsvF6d50ppU2@individual.net>
References: <mailman.1448.1112812981.1799.python-list@python.org>
	<3bkgsvF6d50ppU2@individual.net>
Message-ID: <3bkh9tF6d50ppU3@individual.net>

By the way, is the Parrot project still alive,
or has it been given up on?

Not that I actually want it, but the idea is
kind of morbidly fascinating.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From cookedm+news at physics.mcmaster.ca  Mon Apr  4 20:27:23 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Mon, 04 Apr 2005 20:27:23 -0400
Subject: Gnuplot.py and, _by far_, the weirdest thing I've ever seen on
 my computer
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
Message-ID: <qnkll7yax04.fsf@arbutus.physics.mcmaster.ca>

"syd" <syd.diamond at gmail.com> writes:

> I don't even know where to begin.  This is just bizarre.  I just picked
> up the Gnuplot.py module (a light interface to gnuplot commands) and
> was messing around with it today.
>
> I've got a tiny script, but it only works from the command line about
> half the time!  In the python interpreter, 100%.   Ipython, 100%.  I'm
> not kidding.
>
> #!/bin/env python
> import Gnuplot
> g = Gnuplot.Gnuplot(debug=1)
> g.title('A simple example')
> g('set data style linespoints')
> g('set terminal png small color')
> g('set output "myGraph.png"')
> g.plot([[0,1.1], [1,5.8], [2,3.3], [3,100]])
>
> Here's just one example -- it does not work, then it works.  It seems
> totally random.  It will work a few times, then it won't for a few
> times...
>
> bash-2.05b$ ./myGnu.py
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> set terminal png small color
> gnuplot> set output "myGraph.png"
> gnuplot> plot '/tmp/tmp5LXAow' notitle
>
> gnuplot> plot '/tmp/tmp5LXAow' notitle
>               ^
>          can't read data file "/tmp/tmp5LXAow"
>          line 0: util.c: No such file or directory
>
> bash-2.05b$ ./myGnu.py
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> set terminal png small color
> gnuplot> set output "myGraph.png"
> gnuplot> plot '/tmp/tmpHMTkpL' notitle
>
> (and it makes the graph image just fine)
>
> I mean what the hell is going on?  My permissions on /tmp are wide open
> (drwxrwxrwt).  It does the same thing when I run as root.  And it
> _always_ works when I use the interpreter or interactive python.
>
> Any clues would be greatly appreciated.  I'm baffled.

What's your OS? Python version? Gnuplot.py version (I assume 1.7)?
Put a 'import sys; print sys.version' in there to make sure /bin/env
is using the same python as you expect it to.

It looks like any temporary file it's writing to is deleted too early.

Have a look at gp_unix.py in the Gnuplot source. There's some
customization options that might be helpful. In particular, I'd try

import Gnuplot
Gnuplot.GnuplotOpts.prefer_fifo_data = 0

... then the data will be save to a temporary file instead of piped
through a fifo.

Alternatively, try
Gnuplot.GnuplotOpts.prefer_inline_data = 1

... then no file will be used.

[I don't use Gnuplot myself; this is just what I came up with after a
few minutes of looking at it]

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From roy at panix.com  Tue Apr 19 08:18:30 2005
From: roy at panix.com (Roy Smith)
Date: Tue, 19 Apr 2005 08:18:30 -0400
Subject: Why does python class have not private methods? Will this never
	changed?
References: <311b5ce105041902165a0969a0@mail.gmail.com>
	<mailman.2091.1113911481.1799.python-list@python.org>
Message-ID: <roy-1F0B84.08183019042005@reader1.panix.com>

In article <mailman.2091.1113911481.1799.python-list at python.org>,
 Simon Brunning <simon.brunning at gmail.com> wrote:

> On 4/19/05, could ildg <could.net at gmail.com> wrote:
> > Python is an oop language,
> 
> Yes.
> 
> > Private stuff always makes programming much easier.
> 
> That contention is, at best, debatable. See
> http://groups-beta.google.com/group/comp.lang.python/msg/b977ed1312e10b21.

Nice essay.  Now, for another look at the same issue...

http://thedailywtf.com/forums/32534/ShowPost.aspx


From programmer.py at gmail.com  Tue Apr 19 09:42:16 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Tue, 19 Apr 2005 08:42:16 -0500
Subject: Why does python class have not private methods? Will this never
	changed?
In-Reply-To: <ELednQVBIIDbmvjfRVn-1A@powergate.ca>
References: <311b5ce105041902165a0969a0@mail.gmail.com>
	<mailman.2091.1113911481.1799.python-list@python.org>
	<roy-1F0B84.08183019042005@reader1.panix.com>
	<ELednQVBIIDbmvjfRVn-1A@powergate.ca>
Message-ID: <d52c72d205041906427f8869b3@mail.gmail.com>

Have I missed something?  Doesn't this mangle class methods:

class Foo:
  def __bar(self):
    print "bar"

Granted, you could probably figure out how the names are being
mangled.  In the example above __bar is a defacto private method. 
Griping about it not having `private' in front of it is asinine.  If
someone intentionally has to call a `private' method, then the design
is at fault, not the language.

jw

On 4/19/05, Peter Hansen <peter at engcorp.com> wrote:
> Roy Smith wrote:
> >  Simon Brunning <simon.brunning at gmail.com> wrote:
> >>On 4/19/05, could ildg <could.net at gmail.com> wrote:
> >>>Private stuff always makes programming much easier.
> >>
> >>That contention is, at best, debatable. See
> >>http://groups-beta.google.com/group/comp.lang.python/msg/b977ed1312e10b21.
> >
> > Nice essay.  Now, for another look at the same issue...
> > http://thedailywtf.com/forums/32534/ShowPost.aspx
> 
> Where in the original posting or in the 86 replies
> in that massive page are we supposed to find something
> pointed about this issue?
> 
> Also, do any of the people there use a language like
> Python, or are you merely pointing to one example in
> another language (Java) where, perhaps, "private"
> should have been used?
> 
> Or does this actually back up Simon's point?  You
> don't say and it's really unclear what your point is.
> 
> -Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mwm at mired.org  Tue Apr 26 03:12:07 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 02:12:07 -0500
Subject: What's do list comprehensions do that generator expressions
 don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
	<426ddda7.553554359@news.oz.net>
Message-ID: <861x8ynha0.fsf@guru.mired.org>

bokr at oz.net (Bengt Richter) writes:

> On Mon, 25 Apr 2005 16:48:46 -0400, Bill Mill <bill.mill at gmail.com> wrote:
>>+1 . I think that we should still have the form [genexp] , but without
>>the dangling variable, and implemented with generator expressions. It
>>seems to me that it is inconsistent if I can do list(genexp) but not
>>[genexp] , since they are so similar. Once that happens, we can tell
>>people who ask the OP's question that [genexp] is just another way to
>>spell list(genexp), and he should use it if he wants the entire list
>>constructed in memory.
> ISTM you have to account for
>
>  >>> def foo(g): return g
>  ...
>  >>> foo(123)
>  123
>  >>> foo(c for c in 'abc')
>  <generator object at 0x02EF154C>
>  >>> [(c for c in 'abc')]
>  [<generator object at 0x02EF158C>]
>  >>> [c for c in 'abc']
>  ['a', 'b', 'c']

Right. But that shouldn't be hard to do. Let genexp stand for a a
generator expression/list comprehension without any brackets on it at
all. Then [genexp] is the syntax to expand the list. [(genexp)] is the
syntax to create a list of one element - a generator
object. foo(genexp) will do the right thing.

The question under these circumstances is then: do you want bare
genexp to mean something? Right now, it's a syntax error. But there's
no reason you couldn't have:

   y = x for x in stuff

assign a generator object to y.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From fredrik at pythonware.com  Thu Apr 21 16:24:03 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 22:24:03 +0200
Subject: New line
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
Message-ID: <d491sj$h81$1@sea.gmane.org>

"ionic" wrote:

> This is probably going to sound very dull but, how do you get to the next
> line after youve finished typing the first line?
> 
> Thanks in advance

if you don't know how to get a new line, how did you write that message? </F>



From timo.linna at gmail.com  Thu Apr  7 12:39:14 2005
From: timo.linna at gmail.com (Timo)
Date: 7 Apr 2005 09:39:14 -0700
Subject: Erroneous line number error in Py2.4.1 [Windows 2000+SP3]
References: <1112794029.667294.134370@f14g2000cwb.googlegroups.com>
	<425447A2.2070508@v.loewis.de>
Message-ID: <1112891954.804992.113670@z14g2000cwz.googlegroups.com>

Martin v. L?wis wrote:
> Timo wrote:
> > Does anyone have a clue what is going on?
>
> No. Please make a bug report to sf.net/projects/python.
>

Done:

http://sourceforge.net/tracker/index.php?func=detail&aid=1178484&group_id=5470&atid=105470

BR,
    Timo



From spam4bsimons at yahoo.ca  Sun Apr  3 19:21:10 2005
From: spam4bsimons at yahoo.ca (Brendan)
Date: 3 Apr 2005 16:21:10 -0700
Subject: Help me dig my way out of nested scoping
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
	<qdp051lr4029bs8rhs3mj2pkd17d4fouit@4ax.com>
Message-ID: <1112570470.560599.223390@f14g2000cwb.googlegroups.com>

Thanks for the tips.  Making FW a callable class (choice 5) seems to be
a good (if verbose) solution.  I might just wrap my temporary values in
a list [lastX, lastA, lastB] and mutate them as Michael suggests.
Thanks to Michael especially for the explanation of the name-binding
process that's at the heart of the issue.

The other choicess are not as helpful to me for the following reasons:

choice 1: I don't want the temporary values of lastA and lastB to be
global variables in my case as they are great big numeric arrays, and
I'd like their memory to be reclaimed after FW is done.

choice 2:  I tried this without success.  Using Micheal's example, I
would assume you mean something like this:

def outer():
    b = 1
    def inner():
        outer.b += 1
        print outer.b
    inner()
outer()

Which gives me:
AttributeError: 'function' object has no attribute 'b'

Perhaps I misapplied this method?

choice 3:  I know that Python can return multiple values in one line,
but I don't think that applies here.  My library function F, is looking
for two separate function arguments



From cookedm+news at physics.mcmaster.ca  Fri Apr  1 16:10:12 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Fri, 01 Apr 2005 16:10:12 -0500
Subject: numeric module
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
Message-ID: <qnkr7huciff.fsf@arbutus.physics.mcmaster.ca>

shama.bell at gmail.com writes:

> Hello,
> What's the problem with this code? I get the following error message:
>
>  File "test.py", line 26, in test
>     print tbl[wi][bi]
> IndexError: index must be either an int or a sequence
>
> ---code snippet----
>
> from Numeric import *
> tbl = zeros((32, 16))
>
> def test():
>
>     val = testme()
>     wi = val >> 4
>     bi = val & 0xFL
[above changed to use val instead of crc, as you mentioned in another post]
>     print wi
>     print bi
>     print tbl[wi][bi]

tbl[wi][bi] would be indexing the bi'th element of whatever tbl[wi]
returns. For Numeric arrays, you need

tbl[wi,bi]

Now, you'll have another problem as Terry Reedy mentioned: the indices
(in Numeric) need to be Python ints, not longs. You could rewrite your
test() function as

def test():
    val = testme()
    wi = int(val >> 4)
    bi = int(val & 0xF)
    print wi
    print bi
    print tbl[wi,bi]

and that'll work.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From denise.hartley at gmail.com  Wed Apr 20 14:57:48 2005
From: denise.hartley at gmail.com (D. Hartley)
Date: Wed, 20 Apr 2005 11:57:48 -0700
Subject: python-text window vs. game/graphics window
Message-ID: <8daabe5605042011577adf2f7d@mail.gmail.com>

Hello, group!

I am asking anyone who is knowledgeable about entering text into the
text window while a game/graphics window is running (am using pygame).
 I have asked this on the 'tutor' mailing list and no one could/would
answer it.  I am making a space invaders clone for my Python Teacher's
birthday, and so obviously can not ask him for help! Even the debugger
wouldn't shed light on the situation, due to when it happens:

I am trying to make a high score list.  If you do not score high
enough, the list displays in the text window (fine), and you can type
y/n in the game window for a new game. If you DO make the high score
list, it prompts you to enter your name on the text window (and hit
enter), and displays the updated score list (great).  However, when I
click back to the graphics window, the whole thing closes/shuts
down/crashes.  For the life of me I cant figure it out.  I have looked
at the order of my steps, I've tried to follow it through piece by
piece, and like I said I tried to use the debugger to step through it
- but since the game just closes out, it doesnt tell me anything.

1. How can I stop this crash from happening? I have copied and pasted
the "game over" section of my code below, and am attaching the entire
code to the email, in case that would be helpful.

2. I'd REALLY like to make it display the high scores/prompt for user
name on the game/graphics window, not in the text window, anyway - and
that would eliminate the problem it seems to have when using
keystrokes in the text window and then trying to switch back to the
game window. (it's not a click-specific issue, alt-tab does it too).


I apologize for the "newbie" nature of this question to a more
advanced list, but I have tried everything else I can think of and am
at my wits' end.  The 'deadline' (birthday) is in a week and I'm
stuck.  I'd appreciate any comments or suggestions you might have, in
as simple of language as you can offer them, ha ha.  I *am* new to
python, and so my code may not be so elegant. But I hope you can read
it enough to see what I'm doing wrong or possibly just offer
suggestions for displaying it all in the graphics window and avoiding
the problem altogether.

Thank you so much for your time and ideas!

Sincerely,
Denise

            #game over..
            if lives == 0:

                def add_score():
                    high_scores = pickle.load(file("scores.pik"))
                    score = total_enemy_hits
                    if score > high_scores[-1][0]:
                        print "Ta da! You got", total_enemy_hits,
"Ranch Delivery Devices!"
                        name = read_string("You made the high score
list! What's your name? ")
                        user_score = (score,name)
                        high_scores.append(user_score)
                        high_scores.sort(reverse=True)
                        del high_scores[-1]
                        pickle.dump(high_scores, file("scores.pik", "w"))
                        for score, name in high_scores:
                            slip = 30 - len(name)
                            slip_amt = slip*" "
                            prefix = 5*" "
                            print prefix,name,slip_amt,score
                    else:
                        print "Sorry, you only got", total_enemy_hits,
"Ranch Delivery Devices."
                        print "You didn't quite make the high score list!"
                        for score, name in high_scores:
                            slip = 30 - len(name)
                            slip_amt = slip*" "
                            prefix = 5*" "
                            print prefix,name,slip_amt,score
                        print "Better luck next time!"

                add_score()

                end.play()
                showGameOver(screen, background_image)                
                pygame.display.flip()
                

                answer = ""
                while not answer in ("y","n"):
                   for event in pygame.event.get():
                      if event.type == KEYDOWN:
                         if event.key == K_n:
                            answer = "n"
                         elif event.key == K_y:
                            answer = "y"
                if answer == "n":
                    running = 0
                else:
                    return 1
    
            #refresh the display
            pygame.event.pump()
            pygame.display.flip()

    #well, nice playing with you...
    screen = pygame.display.set_mode((640, 480))
    return 0
-------------- next part --------------
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From bokr at oz.net  Fri Apr 15 17:12:36 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 15 Apr 2005 21:12:36 GMT
Subject: Using python from a browser/security hole
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
	<MPG.1cca20626fa9aeca98968a@news-server>
	<TkP7e.2472$VA3.2138@newssvr30.news.prodigy.com>
	<mailman.1963.1113573165.1799.python-list@python.org>
Message-ID: <42602bef.30220374@news.oz.net>

On Fri, 15 Apr 2005 09:52:41 -0400, James Carroll <mrmaple at gmail.com> wrote:

>I don't think Jython will help much here... you would have to embed
>jython in your applet which makes it big, which makes it take longer
>to download... (or you could install it ahead of time on each client.)
>
>I asked my friend who did some smartcard authentication at a previous
>job... and in his case the card had an LCD readout that gave a
>different key every minute, and the user had to look at that number,
>and type it in for access.   To automate this, with a card reader,
>there could be a (barcoder-scanner-like) app on each client that would
>emulate typing on the keyboard when the card was read.  The user would
>have to click on a text field, then scan their card and the number
>would show up automatically.  One step further... some javascript
>could possibly get the keyboard events as long as the page had input
>focus, and if it sees a smart-card key like sequence of keystrokes,
>then submit a form from a hidden IFrame....
>
>So, short of writing your own plug-in extension for each different
>browser, I'm not sure you're going to be able to access the client
>hardware from a client-side web page.  Either way (plug-in or java
>applet with privileges) your user will have to agree to give access to
>the hardware.
>
>-Jim
I wonder if anyone has written a safe proxy for this kind of purpose,
so that any browser would see just ordinary html at a particular url
but would then be viewing html either passed through from a particular
server or synthesized for for the local access part, which it could
do arbitrarily, depending on its user/privilege status.

[BTW, note reason why top-posts scramble things eventually. Please reconsider ;-)]

>
>On 4/15/05, Philippe C. Martin <philippe at philippecmartin.com> wrote:
>> Neil,
>>=20
>> Would Jpython let me do that ?
>> Would java let me call an external Python script - which in turn would
>> access my device ?
>>=20
>> Thanks
>>=20
>> Philippe
>>=20
>>=20
>> Neil Hodgson wrote:
>>=20
>> > Philippe:
>> >
>> >> Since I need to access a local/client device from the page and
>> >> that I wish to be cross-platform; does that mean Java is my only
>> >> way out ?
See comment above.

>> >
>> >    Java is designed to be safe and not allow access to client devices.
>> > There is a mechanism where you can attempt to ask for permission from
>> > Java but it looked complex to me and I doubt many browsers will
>> > cooperate. They have often locked security down to prevent this sort of
>> > access.
>> >
>> >    Neil
>>=20
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>=20
>>

Regards,
Bengt Richter


From mahs at telcopartners.com  Fri Apr  8 18:03:15 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 08 Apr 2005 15:03:15 -0700
Subject: [Marshal Bug] Was Re: curious problem with large numbers
In-Reply-To: <4256e2ff$1@nntp0.pdx.net>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>	<mailman.1517.1112938969.1799.python-list@python.org>	<4256a676@nntp0.pdx.net>	<4256b80b.34130777@news.oz.net>	<4256b774$1@nntp0.pdx.net>	<4256c65c$1@nntp0.pdx.net>	<mailman.1559.1112987745.1799.python-list@python.org>
	<4256e2ff$1@nntp0.pdx.net>
Message-ID: <4256FFA3.1060304@telcopartners.com>

OK - I think this is it:

My last post fingering pickle was almost but not quite right*.  Actually the 
cuplrit is marshal, which produces the incorrect result that was noted.  The bug 
has nothing to do with IDLE, except that it uses marshal for inter-process 
communication.

Here's the failure case:
  >>> marshal.dumps(1e10000)
  'f\x061.#INF'
  >>> marshal.loads(_)
  1.0
  >>>

I speculate that this comes from marshal doing eval('1.#INF') rather than 
float('1.#INF'), and that it should be fixed to use float.  Alternatively, it 
could detect this special case and raise its own exception.  By analogy with 
pickle and cPickle it would make sense to raise ValueError on unmarshalling 
i.e., marshal.load(s).

  >>> import pickle
  >>> pickle.dumps(1e10000)
  'F1.#INF\n.'
  >>> pickle.loads(_)
  Traceback (most recent call last):
    File "<input>", line 1, in ?
    File "c:\python24\lib\pickle.py", line 1394, in loads
      return Unpickler(file).load()
    File "c:\python24\lib\pickle.py", line 872, in load
      dispatch[key](self)
    File "c:\python24\lib\pickle.py", line 968, in load_float
      self.append(float(self.readline()[:-1]))
  ValueError: invalid literal for float(): 1.#INF
  >>>


A more ambitious fix (which could be combined with option 1) would have the 
float constructor accept 1.#INF



Incidentally, the reason why this workaround is effective:
IDLE 1.1
  >>> 1e308*2
1.#INF
  >>>

is that it is the compiled code object (not what it evaluates to) that is marshalled

  >>> co = compile("1e308*2","<None>","single")
  >>> dis.dis(co)
    1           0 LOAD_CONST               0 (1e+308)
                3 LOAD_CONST               1 (2)
                6 BINARY_MULTIPLY
                7 PRINT_EXPR
                8 LOAD_CONST               2 (None)
               11 RETURN_VALUE
  >>> ma = marshal.dumps(co)
  >>> ma
 
'c\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00@\x00\x00\x00s\x0c\x00\x00\x00d\x00\x00d\x01\x00\x14Fd\x02\x00S(\x03\x00\x00\x00f\x061e+308i\x02\x00\x00\x00N(\x00\x00\x00\x00(\x00\x00\x00\x00(\x00\x00\x00\x00(\x00\x00\x00\x00t\x06\x00\x00\x00<None>t\x01\x00\x00\x00?\x01\x00\x00\x00s\x00\x00\x00\x00'
  >>>

Michael



From mahs at telcopartners.com  Wed Apr 20 20:09:16 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 20 Apr 2005 17:09:16 -0700
Subject: Enumerating formatting strings
In-Reply-To: <pan.2005.04.20.22.50.45.945404@dalkescientific.com>
References: <mailman.2061.1113855968.1799.python-list@python.org>	<3cm9r2F6nif67U1@individual.net>	<d44vgg$jmr$04$1@news.t-online.com>
	<42660fc2.42093557@news.oz.net>	<d455oo$7et$02$1@news.t-online.com>
	<42662dc9.49780670@news.oz.net>	<mailman.2202.1114027350.1799.python-list@python.org>
	<pan.2005.04.20.22.50.45.945404@dalkescientific.com>
Message-ID: <d46qmq$nca$1@sea.gmane.org>

Andrew Dalke wrote:

> I see you assume that only \w+ can fit inside of a %()
> in a format string.  The actual Python code allows anything
> up to the balanced closed parens.
> 
Gah! I guess that torpedoes the regexp approach, then.

Thanks for looking at this

Michael



From robin at alldunn.com  Tue Apr 26 21:17:16 2005
From: robin at alldunn.com (Robin Dunn)
Date: Tue, 26 Apr 2005 18:17:16 -0700
Subject: ANN: wxPython 2.6.0.0
Message-ID: <426EE81C.6070608@alldunn.com>

Announcing
----------

I'm pleased to announce the 2.6.0.0 release of wxPython, now available
for download at http://wxpython.org/download.php.  This release
consists of one more round of stabalization work (bug fixes and such)
since the 2.5 series, and a few minor new features.  This first 2.6
release marks the begining of a new stable release series, which for
Python means that there will be no API compatibility breakage for the
life of the series.  (It means more than that for the core C++ code,
see http://wiki.wxpython.org/index.cgi/ReleaseSeries) See the changes
list below for details.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK or GTK2, and Mac OS X.


Changes in 2.6.0.0
------------------

wxMSW: Fixed wx.TransientPopupWindow (and therefore wx.TipWindow) to
auto-dismiss when the mouse is clicked outside of the popup like it is
supposed to.

wxMSW: Fixed bug #1167891 wx.Notebook display problem with wx.NB_MULTILINE.

wxMSW: Fixed bad cliping of hidden windows inside of wx.StaticBox.

wxGTK:  The configure flags for selecting GTK+ 1.2.x or 2.x has
changed slightly.  It is now --with-gtk[=VERSION] where VERSION is
either '1', '2' or 'any'.  The default is '2'.

wx.stc.StyledTextCtrl: Added the following methods for alternate ways
to set and fetch text from the document buffer.  They work similarly
to the existing methods of the same name, except that they don't go
through the same string/unicode <--> wxString conversions.  The "Raw"
methods will do no conversions at all and in a unicode build of
wxPython the strings will be in the utf-8 encoding and in an ansi
build no assumption is made about the encoding.  The "UTF8" functions
will attempt to always get/set utf-8 text, which it will always be
able to do in a unicode build, and in an ansi build it will depend on
the content of the utf-8 used being compatible with the current
encoding, (you'll get an exception otherwise.)

       ===================  ====================
       AddTextRaw           AddTextUTF8
       InsertTextRaw        InsertTextUTF8
       GetCurLineRaw        GetCurLineUTF8
       GetLineRaw           GetLineUTF8
       GetSelectedTextRaw   GetSelectedTextUTF8
       GetTextRangeRaw      GetTextRangeUTF8
       SetTextRaw           SetTextUTF8
       GetTextRaw           GetTextUTF8
       AppendTextRaw        AppendTextUTF8
       ===================  ====================


wx.stc.StyledTextCtrl:  Added the StyleSetFontEncoding(style, enc)
method that allows you to set the encoding to be used by the font for
a particular style.

wxMac: Fixed wx.ComboBox to forward the EVT_CHAR, EVT_KEY_DOWN,
EVT_KEY_UP and EVT_TEXT events from its embedded text control.

wxMac: Corrected refresh bugs in wxGrid.

XRCed: Updated to version 0.1.5.
     * Added wxWizard, wxWizardPageSimple (only from pull-down menu).
     * Hide command for test window.
     * Replacing classes works better.
     * Added Locate tool.



-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From magoldfish at gmail.com  Fri Apr 22 23:10:46 2005
From: magoldfish at gmail.com (Marcus Goldfish)
Date: Fri, 22 Apr 2005 23:10:46 -0400
Subject: internet explorer/firefox plugin/toolbar
In-Reply-To: <008201c5479c$18222b90$0301a8c0@Mesa.com>
References: <008201c5479c$18222b90$0301a8c0@Mesa.com>
Message-ID: <5e183f3d050422201016a48edf@mail.gmail.com>

> does anyone have any ideas as to how to go about creating a plugin/toolbar
> for both/either the IE/Firefox browsers?
For IE, checkout Browser Helper Objects (BHOs).  Sample python code
can be found at:

http://aspn.activestate.com/ASPN/Mail/Message/ctypes-users/2263094

Marcus


From bokr at oz.net  Sun Apr 17 03:31:34 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 07:31:34 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<4260bc72.67216001@news.oz.net>
	<Pine.A41.4.61b.0504161733560.72462@dante72.u.washington.edu>
Message-ID: <4261da60.140413834@news.oz.net>

On Sat, 16 Apr 2005 18:46:28 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:
[...]
>> In that case, my version would just not have a do, instead defining the do suite
>> as a temp executable suite, e.g., if instead
>>
>>
>> we make an asignment in the suite, to make it clear it's not just a calling thing, e.g.,
>>
>> do f(27, 28):
>>      x = stuff()
>>
>> then my version with explict name callable suite would be
>>
>> def f(thunk, a, b):
>>      # a == 27, b == 28
>>      before()
>>      thunk()
>>      after()
>>
>> set_x():
>>     x = stuff() # to make it plain it's not just a calling thing
>>
>> f(set_x, 27, 28)
>> # x is now visible here as local binding
>>
>> but a suitable decorator and an anonymous callable suite (thunk defined my way ;-) would make this
>>
>> @f(27, 28)
>> (): x = stuff()
>>
>
>Hmm, but this would require decorators to behave differently than they do 
>now.  Currently, decorators do not automatically insert the decorated 
>function into the argument list.  They require you to define 'f' as:
>
>def f(a, b):
> 	def inner(thunk):
> 		before()
> 		thunk()
> 		after()
> 	return inner
>
>Having to write this type of code every time I want an thunk-accepting 
>function that takes other arguments would be pretty annoying to me.
>
Yes, I agree. That's the way it is with the decorator expression.
Maybe decorator syntax is not the way to pass thunks to a function ;-)

My latest thinking is in terms of suite expressions, ::<suite> being one,
and actually (<arglist>):<suite> is also a suite expression, yielding a thunk.
So the call to f could just be written explicitly with the expression in line:

      f((():x=stuff()), 27, 28)
or
      f(():
          x = stuff()
          done = True
      ,27, 28)   # letting the dedented ',' terminate the ():<suite> rather than parenthesizing

or
      safe_open((f):

          for line in f:
              print f[:20]

      ,'datafile.txt', 'rb')

That's not too bad IMO ;-)


>>>
>>> Thunks can also accept arguments:
>>>
>>> def f(thunk):
>>>    thunk(6,7)
>>>
>>> do x,y in f():
>>>    # x==6, y==7
>>>    stuff(x,y)
>>
>> IMO
>>    @f
>>    (x, y): stuff(x, y)   # like def foo(x, y): stuff(x, y)
>>
>> is clearer, once you get used to the missing def foo format
>>
>
>OK.  I prefer a new keyword because it seems confusing to me to re-use 
>decorators for this purpose.  But I see your point that decorators can be 
>used this way if one allows anonymous functions as you describe, and if 
>one allows decorators to handle the case in which the function being 
>decorated is anonymous.
I tend to agree now about using decorators for this.
With thunk calling parameter and extra f calling parameters, in line would look like

    f((x,y):
        # x==6, y==7
        stuff(x, y)
    ,'other' ,'f' ,args)

I guess you could make a bound method to keep the thunk

    dothunk_n_all = f.__get__((x, y):
        stuff(x,y)
    ,type(():pass))

and then call that with whatever other parameter you specified for f

    do_thunk_n_all(whatever)

if that seemed useful ;-)

>
>>>
>>> The return value can be captured
>>>
>> This is just a fallout of f's being an ordinary function right?
>> IOW, f doesn't really know thunk is not an ordinary callable too?
>> I imagine that is for the CALL_FUNCTION byte code implementation to discover?
>
>yes
>
>>
>>> def f(thunk):
>>>    thunk()
>>>    return 8
>>>
>>> do t=f():
>>>    # t not bound yet
>>>    stuff()
>>>
>>> print t
>>> ==> 8
>> That can't be done very well with a decorator, but you could pass an
>> explicit named callable suite, e.g.,
>>
>>     thunk(): stuff()
>>     t = f(thunk)
>
>But not having to do it that way was most of the purpose of thunks.
I forgot that ():<suite> is an expression

       t = f(():stuff()) # minimal version

or

      final_status = safe_open((f):

          for line in f:
              print f[:20]

      ,'datafile.txt', 'rb')


<snip>
>
>It wouldn't be a problem to use 'return' instead of 'continue' if people 
>so desired, but I find 'return' more confusing because a 'return' in 'for' 
>suites returns from the function, not from the suite.  That is, having 
>'return' mean different things in these two pieces of code would be 
>confusing:
>
>for i in [1,2]:
> 	return 10

>
>do i in each([1,2]):
> 	return 10
But in my syntax,

    each((i):
        return 10
    ,[1,2])

Um, well, I guess one has to think about it ;-/

The thunk-accepter could pass the thunk a mutable arg to
put a return value in, or even a returnvalue verse thunk?

    def accepter(thk, seq):
        acquire()
        for i in seq:
            thk(i, (retval):pass)
            if retval: break
        release()

    accepter((i, rvt):
        print i
        rvt(i==7)  # is this legal?
    , xrange(10))

Hm, one thing my syntax does, I just noticed, is allow you
to pass several thunks to a thunk-accepter, if desired, e.g.,
(parenthesizing this time, rather than ending ():<suite> with
dedented comma)

    each(
        ((i):  # normal thunk
            print i),
        ((j):  # alternative thunk
            rejectlist.append(j)),
        [1,2])

<snip>

>I see what you're getting at with decorators and anonymous functions, but 
>there are a couple of things that, to me, make it worth coming up with a 
>whole new syntax.  First, I don't like how one does not get the thunk 
>inserted automatically into the argument list of the decorator, as I 
>described above.  Also, I don't like how the return value of the decorator 
>cannot be captured (and is already used for another purpose).  The fact 
>that decorators require one more line of code is also a little bothersome. 
>Decorators weren't intended to be used this way, so it seems somewhat 
>hacky to do so.  Why not a new syntax?
>
Ok, I agree this does not fit decorators well. And I do agree that a nice
syntax that sugars over the creation and passing of thunks makes for clean
simple cases, but I would like access to the non-sugar primitives too, which for

    do <opt assignment> <thunk arg list> in <callable>(<arglist>):
        <thunk-defining suite>

IIUC translates to my

   < opt assignment> <callable>(((<thunk arg list>):
           <thunk-defining-suite>),<arglist>)

With possible paren dropping and white space insertion if you want to arrange things.
With the primitives, I can pass multiple thunks to an accepter, and put them in
specific arg positions. I also can also bind it and use it to get a side effect
out of a generator expression that now has its own scope, e.g.,

    count = 0
    counter(count): count +=1
    list(i for i in xrange(20) if counter() or True)

Interestingly, this ought to work, right?

    stopper(i): if i>5: raise StopIteration
    list(stopper(i) or i for i in xrange(20))

All untested hadwaving, of course ;-)

Regards,
Bengt Richter


From dirgesh at gmail.com  Mon Apr  4 15:59:39 2005
From: dirgesh at gmail.com (GujuBoy)
Date: 4 Apr 2005 12:59:39 -0700
Subject: Changing TEXT color from python
Message-ID: <1112644779.486105.179240@l41g2000cwc.googlegroups.com>

so i am writing a program in Python and i want to print out a few
statements in Different colors

for example "Print hello world in RED, and "GOOD BYE in blue" "

how can i do this...and hopefully without including any external
modules.

thanks in advance



From python-url at phaseit.net  Mon Apr 25 13:08:03 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 25 Apr 2005 17:08:03 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 25)
Message-ID: <d4j5sn$82d$1@lairds.us>

QOTW: "Sure, but what about the case where his program is on paper tape and
all he has for an editor is an ice pick?" - Grant Edwards

"And in this case, you get improved usability *and* improved speed at the
same time. That's the way it should be." - Fredrik Lundh


    The Simplest Possible Metaclass:
        http://orbtech.com/blog/simplemetaclass
        
    Enumerating formatting strings:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/315099737b139c5e
        
    Andrew Dalke continues to produce interesting articles at a frankly
    preposterous rate. A selection, covering tracing python code, using
    XML-RPC, screen scraping, parsing and statistics:
        http://www.dalkescientific.com/writings/diary/archive/2005/04/20/tracing_python_code.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/21/using_xmlrpc.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/21/screen_scraping.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/22/parsing.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/22/statistics.html

    Wing 2.0.3 is available:
        http://wingware.com/pub/wingide/press/2.0.3-release.html

    Why does Python slicing work the way it does?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/947866ec21512405
        
    Another Python tool from Google; this one a MySQL status monitor:
        http://goog-mmaim.sourceforge.net/
        
    Processing XML one 'record' at a time:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/4b5f06d837a0e20b
        
    GOTO hell:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/832906c6122dc137
        
    Launching a subprocess without a console window on Windows:
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/409002
        
    Python or PHP? Duh!
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6d65bbac956ebbb0
        

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From ajikoe at gmail.com  Sun Apr 24 11:49:11 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 24 Apr 2005 08:49:11 -0700
Subject: Is this a bug?
In-Reply-To: <116nfblc10i9340@corp.supernews.com>
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<116nfblc10i9340@corp.supernews.com>
Message-ID: <1114357751.497493.307900@o13g2000cwo.googlegroups.com>

check this site:
http://mail.python.org/pipermail/python-bugs-list/2003-November/021201.html

pujo



From kent37 at tds.net  Wed Apr 27 07:10:22 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 27 Apr 2005 07:10:22 -0400
Subject: Can .py be complied?
In-Reply-To: <426f562f$1_3@rain.i-cable.com>
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
Message-ID: <426f6eb7$1_1@newspeer2.tds.net>

monkey wrote:
>>It is generally not very easy or straight-forward.
>>For now, you can use pyfreeze to snap the application.....
>>If your application does not use any C modules, you can try to use
>>Jython instead.
>>
>>Cheers
>>Maurice
> 
> 
> If using Jython to complie, is the end-user need JRE instead of Python
> installed, or need both of them?

The end-user needs the JRE, not Python.

Kent


From harlinseritt at yahoo.com  Fri Apr  1 06:19:16 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 1 Apr 2005 03:19:16 -0800
Subject: Showing errors explicitly in try... except
Message-ID: <1112354356.092391.238710@f14g2000cwb.googlegroups.com>

When using try... except... errors don't show up. Is there a way to
force stderr despite using try...except? 

thanks,

Harlin Seritt



From sjmachin at lexicon.net  Wed Apr 20 17:58:40 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 21 Apr 2005 07:58:40 +1000
Subject: Python Win32 Extensions and Excel 2003. OL 11.0 Supported?
References: <1114012496.533936.297580@l41g2000cwc.googlegroups.com>
	<mailman.2187.1114016871.1799.python-list@python.org>
Message-ID: <1iid61lqtl5u2hek2c7khnho9uinhgo4ie@4ax.com>

On Wed, 20 Apr 2005 13:05:54 -0400, Steve Holden <steve at holdenweb.com>
wrote:

>Mudcat wrote:
>> Howdy,
>> 
>> I could have sworn I downloaded a version of python win that supported
>> object library 11.0 at some point. However I just downloaded versions
>> 204 and 203, and the highest version they have is OL 9.0.
>> 
>> Does anyone know if this is a mistake or if Excel 2003 isn't yet
>> supported with the extensions?
>> 
>I was under the impression that makepy just listed the libraries it 
>found on the system it ran on. Is this wrong?
>

This is my impression also.

Basis 1: Observation: E.g. client machine with Excel 2000: OL 9.0. My
machine: OL 10.0 and (no kidding) 5.0

Basis 2: Reductio ad a[db]surdum [1]: Where else would makepy be
getting its info from? Would we really expect pywin32 to have all the
info available to support all libraries ever used on any Windows
machine? How long would the download take? What would be the legal
implications of [re]distributing all that Microsoft-created stuff?

Cheers,
John

Note [1]: What's happened to the martellibot? Not a post for over 2
months! Who else will leap in and tell me which of adsurdum and
absurdum is better usage?





From WLigtenberg at gmail.com  Fri Apr 22 14:02:16 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Fri, 22 Apr 2005 20:02:16 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
	<pan.2005.04.22.13.22.14.591804@gmail.com>
	<mailman.2282.1114177844.1799.python-list@python.org>
	<pan.2005.04.22.13.56.27.343483@gmail.com>
	<pan.2005.04.22.17.25.06.536391@gmail.com>
	<mailman.2296.1114191795.1799.python-list@python.org>
Message-ID: <pan.2005.04.22.18.02.15.156790@gmail.com>

Since there are more than one database references possible per record you
should get per record a list of database names, database strings and
databases ids. (where the strings and the id's are really the same thing...)
So per record you check for both alternatives but since there could be
more than one, you do findall and get a (unsorted) list back. And now you
don't know which ID belonged to which database...
See my problem?

Cheers,

Willem

On Fri, 22 Apr 2005 19:38:03 +0200, Fredrik Lundh wrote:

> Willem Ligtenberg wrote:
> 
>> So I get a list database names and two! lists of ID's
>> And those two are in no way related. Is there an easy way to create a
>> dictionary like this DBname --> ID
> 
> why not just check for both alternatives?
> 
>     text = elem.findtext("Object-id_str")
>     if text is None:
>         text = elem.findtext("Object-id_id")
> 
> (or you can loop over the child elements and map elem.tag through a
> dictionary...)
> 
>> If not, I still might need to revert to SAX... :(
> 
> you still have to check for both alternatives...
> 
> (if you find a parsing problem that you cannot solve with a light-weight
> DOM, SAX won't help you...)
> 
> </F>



From wweston at att.net  Fri Apr  8 11:04:32 2005
From: wweston at att.net (wes weston)
Date: Fri, 08 Apr 2005 15:04:32 GMT
Subject: Rotating arbitrary sets of elements within a list
In-Reply-To: <1112971150.361681.313100@o13g2000cwo.googlegroups.com>
References: <1112971150.361681.313100@o13g2000cwo.googlegroups.com>
Message-ID: <44x5e.54931$cg1.34951@bgtnsc04-news.ops.worldnet.att.net>

phil_nospam_schmidt at yahoo.com wrote:
> I'm trying to come up with a good algorithm to do the following:
> 
> Given a list 'A' to be operated on, and a list 'I' of indices into 'A',
> rotate the i'th elements of 'A' left or right by one position.
> 
> Here's are some examples:
> 
> A = [a, b, c, d, e, f]
> I = [0, 3, 4]
> 
> rotate(A, I, 'left') --> [b, c, d, e, f, a]
> rotate(A, I, 'right') --> [b, a, c, f, d, e]
> 
> I = [1, 3, 4]
> 
> rotate(A, I, 'left') --> [b, a, d, e, c, f]
> rotate(A, I, 'right') --> [a, c, b, f, d, e]
> 
> Any ideas?
> 

phil,
    Could you do a circlular buffer where the front
starts at 'a' (0) and rotate left increments front.
The i'th element is gotten as mod 6 (front+i) where
6 would be the length of the list.
wes



From roccomoretti at hotpop.com  Thu Apr 21 10:22:00 2005
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Thu, 21 Apr 2005 09:22:00 -0500
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <mailman.2211.1114078086.1799.python-list@python.org>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>	<_Lm9e.23143$Xm3.17864@trndny01>	<mailman.2173.1114002239.1799.python-list@python.org>	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
Message-ID: <d48cu8$1a9$1@news.doit.wisc.edu>

Steve Holden wrote:
> The principle of least surprise is all very well, but "needless surprise 
> of newbies" is a dangerous criterion to adopt for programming language 
> design and following it consistently would lead to a mess like Visual 
> Basic, which grew by accretion until Microsoft realized it was no longer 
> tenable and broke backward compatibility.

Well, *needless* surprise of newbies is never a good thing. If it were, 
it wouldn't be needless, now would it? :-) Surprising newbies just to 
surprise newbies is just cruel, but there is room in this world for "it 
may suprise you now, but you'll thank us later" and situations where 
there is a "newbie way" and an "other way", and the "other" way is 
chosen because it's the easiest thing for the most people in the long run.

But I agree, having "the easiest thing for newbies" as your sole 
criterion for language design is a road to madness, for no other reason 
than that newbies don't stay newbies forever.


From ola.natvig at infosense.no  Mon Apr 11 07:13:09 2005
From: ola.natvig at infosense.no (Ola Natvig)
Date: Mon, 11 Apr 2005 13:13:09 +0200
Subject: database in python ?
In-Reply-To: <op.so2d8n2cqfv3if@localhost>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
Message-ID: <5n2qi2-g9g.ln1@pluto.i.infosense.no>

Pierre-Fr?d?ric Caillaud wrote:
> 
>> MySQL is an excellent option is very well documented.  It is also a
>> defacto standard for OpenSource databases.
> 
> 
>     MySQL sucks for anything but very very basic stuff as it supports 
> no  transactions, foreign keys, procedures, triggers, concurrency, etc.
>     Postgresql is a lot better, free, and the psycopg adapter for 
> Postgres is  *very very* fast (a lot faster than the MySQL one) and it 
> has a  dictfetchall() method which is worth its weight in donuts !

MySQL has support for transactions and foreign keys in it's InnoDB 
engine. In 5.0 it supports views procedures. Some people seems to hate 
MySQL :-) but a whole lot of other people like it a lot.

The thing is, if you don't spesificaly state that you want triggers, 
concurrency and procedures I guess that your needs are quite basic.

However you won't be be disappointed with either MySQL or postgree in 
your trunk :)

ola

-- 
--------------------------------------
  Ola Natvig <ola.natvig at infosense.no>
  infoSense AS / development


From ville at spammers.com  Wed Apr  6 03:38:58 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 10:38:58 +0300
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<mailman.1419.1112771209.1799.python-list@python.org>
Message-ID: <du7ll7wicbx.fsf@mozart.cc.tut.fi>

>>>>> "Miki" == Miki Tebeka <miki.tebeka at zoran.com> writes:

    Miki> Emacs (or VIm in my case) takes time to learn. However when
    Miki> you start to understand it and know you way around it'll do
    Miki> things no other editor will do for you.

Other editors also do stuff Emacs won't do. Code completion is a
killer feature and emacs sucks at it (yes, w/ Cedet too).

Emacs is pretty good for Python if you can't wait for something like
Eclipse+pydev to start (which is a good choice, and worth
learning). Emacs is not necessarily worth learning unless you are an
emacs user already. Emacs also looks so horrible in Linux that I tend
to go for Kate when I'm at home.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From syorty at socal.rr.com  Tue Apr 19 12:33:09 2005
From: syorty at socal.rr.com (Sam Yorty)
Date: Tue, 19 Apr 2005 16:33:09 GMT
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven wh
References: <1113925283.115755.202120@f14g2000cwb.googlegroups.com>
Message-ID: <9pa9e.893$zX7.248@newssvr13.news.prodigy.com>

The only people who "know" they are going to heaven, clearly aren't


<RonGrossi382685 at yahoo.com> wrote in message
news:1113925283.115755.202120 at f14g2000cwb.googlegroups.com...
>
> The reason some people don't know for sure
> if they are going to Heaven when they die
> is because they just don't know.
>
> The good news is that you can know for
> sure that you are going to Heaven which is
> described in the Holy Bible as a beautiful
> place with no death, sorrow, sickness or
> pain.
>
> God tells us in the Holy Bible how simple
> it is to be saved so that we can live
> forever with Him in Heaven.
>
> "For if you confess with your mouth Jesus
> is Lord and believe in your heart that God
> raised Him from the dead, you
> WILL BE SAVED." (Romans 10:9)
>
> Over 2000 years ago God came from Heaven
> to earth in the person of Jesus Christ to
> shed His blood and die on a cross to pay
> our sin debt in full.
>
> Jesus Christ was born in Israel
> supernaturally to a virgin Jewish woman
> named Mary and lived a sinless life for
> thirty-three years.
>
> At the age of thirty-three Jesus was
> scourged and had a crown of thorns pressed
> onto His head then Jesus was crucified.
>
> Three days after Jesus died on a cross and
> was placed in a grave Jesus rose from the
> dead as Jesus said would happen before
> Jesus died.
>
> If someone tells you that they are going
> to die and in three days come back to life
> again and it happens then this person must
> be the real deal.
>
> Jesus Christ is the only person that ever
> lived a perfect sinless life.
>
> This is why Jesus is able to cover our
> sins(misdeeds) with His own blood because
> Jesus is sinless.
>
> The Holy Bible says, "In Him(Jesus) we
> have redemption through His blood, the
> forgiveness of sins..." (Ephesians 1:7)
>
> If you would like God to forgive you of
> your past, present and future sins just
> ask Jesus Christ to be your Lord and
> Saviour.
>
> It doesn't matter how old you are or how
> many bad things that you have done in
> your life including lying and stealing
> all the way up to murder.
>
> Just pray the prayer below with your
> mouth and mean it from your heart and
> God will hear you and save you.
>
> Dear Jesus Christ, I want to be saved so
> that I can have a home in Heaven with You
> when I die. I agree with You that I am a
> sinner. I believe that You love me and want
> to save me. I believe that You bled and
> died on the cross to pay the penalty for my
> sins and that You rose from the dead.
> Please forgive my sins and come into my
> heart and be my Lord and Saviour. Thanks
> Lord Jesus Christ for forgiving me and
> saving me through Your merciful grace.
> Amen.
>
> Welcome to the family of God if you just
> allowed God to save you. Now you are a real
> Christian and you can know for sure that
> you will live in Heaven forever when this
> life comes to an end.
>
> As a child of God we are to avoid
> sin(wrongdoing), but if you do sin the
> Holy Bible says, "My dear children, I
> write this to you so that you will not sin.
> But if anybody does sin, we have one who
> speaks to the Father in our defense Jesus
> Christ, the Righteous One."
>
> Those of you that have not yet decided to
> place your trust in the Lord Jesus Christ
> may never get another chance to do so
> because you do not know when you will die.
>
> Jesus said "I am the way, the truth and
> the life: no one can come to the
> Father(God)(in Heaven), but by me."
> (John 14:6)
>
> This means that if you die without
> trusting in Jesus Christ as your Lord and
> Saviour you will be forever separated from
> the love of God in a place called Hell.
>
> The Holy Bible descibes Hell as a place of
> eternal torment, suffering, pain and agony
> for all those who have rejected Jesus Christ.
>
> The good news is that you can avoid Hell by
> allowing Jesus Christ to save you today.
> Only then will you have true peace in your
> life knowing that no matter what happens you
> are on your way to Heaven.
>
>
> Praise the Lord!
> Servant of the Lord Jesus Christ
> Ronald L. Grossi
>
> *Show this to your family and friends so
> they can know that they have a choice
> where they will spend eternity. Thanks!
>
> ____________________________________________________
>
>
>
> Got Questions?
> http://www.gotquestions.org/archive.html
>
> Other Languages
> http://www.godssimpleplan.org/gsps.html
>
> Free Movie: To Hell and Back
> http://www.tbn.org/index.php/8/1.html
>
> Animation
> http://www.browser.to/jesus-animation
>
> The Passion Of The Christ
> http://www.thepassionofthechrist.com
>
> Beware Of Cults
> http://www.carm.org/cults/cultlist.htm
>
> About Hell
> http://www.equip.org/free/DH198.htm
>
> Is Jesus God?
> http://www.powertochange.com/questions/qna2.html
>
> Free Online Bible
> http://www.biblegateway.com
>
>
> ____________________________________________________
>




From peter at engcorp.com  Fri Apr 22 10:17:21 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 22 Apr 2005 10:17:21 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <d48cu8$1a9$1@news.doit.wisc.edu>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>	<_Lm9e.23143$Xm3.17864@trndny01>	<mailman.2173.1114002239.1799.python-list@python.org>	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<d48cu8$1a9$1@news.doit.wisc.edu>
Message-ID: <HOadnbQkd5fxmvTfRVn-og@powergate.ca>

Rocco Moretti wrote:
> Steve Holden wrote:
>> The principle of least surprise is all very well, but "needless 
>> surprise of newbies" is a dangerous criterion to adopt for programming 
>> language design and following it consistently would lead to a mess 
>> like Visual Basic, which grew by accretion until Microsoft realized it 
>> was no longer tenable and broke backward compatibility.
>... 
> But I agree, having "the easiest thing for newbies" as your sole 
> criterion for language design is a road to madness, for no other reason 
> than that newbies don't stay newbies forever.

If Visual BASIC is the example of "easiest thing for newbies",
then it disproves your theory already.  I think VB newbies
*do* stay newbies forever (or as long as they are using just VB).

-Peter


From greg at cosc.canterbury.ac.nz  Fri Apr  1 00:59:18 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 01 Apr 2005 17:59:18 +1200
Subject: Things you shouldn't do
In-Reply-To: <1112159461.244256.311350@z14g2000cwz.googlegroups.com>
References: <mailman.491.1110983650.1799.python-list@python.org>
	<d19h7u$gro$1@news.sap-ag.de> <424A2080.4080800@yahoo.com>
	<1112159461.244256.311350@z14g2000cwz.googlegroups.com>
Message-ID: <3b46a1F697cr9U1@individual.net>

Paul McGuire wrote:
> The code was filled with two key variables: t_1 and t_l.  Printing out
> the source in a Courier font made these two vars completely
> indistinguishable,

Are you sure it was Courier? I'm looking at it now
in Courier, and they are different, although very
similar.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From kay.schluehr at gmx.net  Tue Apr  5 03:35:45 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 5 Apr 2005 00:35:45 -0700
Subject: Decorator Maker is working. What do you think?
In-Reply-To: <sql3515i90b9v5mojnkaet31ftr57hr99j@4ax.com>
References: <sql3515i90b9v5mojnkaet31ftr57hr99j@4ax.com>
Message-ID: <1112686545.380929.142740@g14g2000cwa.googlegroups.com>

Ron_Adam wrote:
> Ok... it's works! :)
>
> So what do you think?

Not much. As long as You do not present any nontrivial examples like
Guidos MultiMethod decorator or an implementation of the dispatching
"case" decorator I proposed that would benefit from factoring into pre-
and postprocessing the pattern has only limited use and worse it
suggests a misnomer: it obscures the semantics that is clearly
functional/OO not procedural. 

Regards,
Kay



From bokr at oz.net  Tue Apr 26 03:38:46 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 26 Apr 2005 07:38:46 GMT
Subject: Quote-aware string splitting
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
	<116rahd5t0lq85e@corp.supernews.com>
Message-ID: <426de8f7.556450523@news.oz.net>

On Mon, 25 Apr 2005 19:40:44 -0700, Jeffrey Froman <jeffrey at fro.man> wrote:

>J. W. McCall wrote:
>
>> For example, given the string:
>> 
>> 'spam "the life of brian" 42'
>> 
>> I'd want it to return:
>> 
>> ['spam', 'the life of brian', '42']
>
>The .split() method of strings can take a substring, such as a quotation
>mark, as a delimiter. So a simple solution is:
>
>>>> x = 'spam "the life of brian" 42'
>>>> [z.strip() for z in x.split('"')]
>['spam', 'the life of brian', '42']
>

 >>> x = ' sspam " ssthe life of brianss " 42'
 >>> [z.strip() for z in x.split('"')]
 ['sspam', 'ssthe life of brianss', '42']

Oops, note some spaces inside quotes near ss and missing double quotes in result.
Maybe (not tested beyond what you see):

 >>> [r for r in [(i%2 and ['"'+z+'"'] or [z.strip()])[0] for i,z in enumerate(x.split('"'))] if r] or ['']
 ['sspam', '" ssthe life of brianss "', '42']
 >>> x = ' ""  ""  '
 >>> [r for r in [(i%2 and ['"'+z+'"'] or [z.strip()])[0] for i,z in enumerate(x.split('"'))] ifr] or ['']
 ['""', '""']
 >>> x='""'
 >>> [r for r in [(i%2 and ['"'+z+'"'] or [z.strip()])[0] for i,z in enumerate(x.split('"'))] ifr] or ['']
 ['""']
 >>> x=''
 >>> [r for r in [(i%2 and ['"'+z+'"'] or [z.strip()])[0] for i,z in enumerate(x.split('"'))] ifr] or ['']
 ['']

 >>> [(i%2 and ['"'+z+'"'] or [z.strip()])[0] for i,z in enumerate(x.split('"'))]
 ['sspam', '" ssthe life of brianss "', '42']


Regards,
Bengt Richter


From pclinch at internet-glue.co.uk  Fri Apr  8 11:30:58 2005
From: pclinch at internet-glue.co.uk (Paul Clinch)
Date: 8 Apr 2005 08:30:58 -0700
Subject: dynamic loading of code,
	and avoiding package/module name collisions.
References: <d349ef$scn$1@newsg2.svr.pol.co.uk>
Message-ID: <8cf2994e.0504080730.2cbdc4d4@posting.google.com>

Dear "John Perks and Sarah Mount",

> Long story short: what I'm looking for is information on how have a Python
> app that:
> * embeds an editor (or wxNoteBook full of editors)
> * loads code from the editors' text pane into the app
> * executes bits of it
> * then later unloads to make way for an edited version of the code.
> The new version needs to operate on a blank slate, so reload() may not be
> appropriate.


This sounds like 'idle'.

Regards, Paul C.


From hdnews at gawab.com  Fri Apr  1 07:56:17 2005
From: hdnews at gawab.com (Hans Oesterholt-Dijkema)
Date: Fri, 01 Apr 2005 14:56:17 +0200
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
Message-ID: <424d427e$0$142$e4fe514c@news.xs4all.nl>

> 
>                 The Fate Of LAMBDA in PLT Scheme v300
>                                  or
>                   Lambda the Ultimate Design Flaw
> 
> Why drop LAMBDA?  

Why not? Isn't all code eventually anonymous and relocatable?


From eurleif at ecritters.biz  Sat Apr 23 22:17:49 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 24 Apr 2005 02:17:49 GMT
Subject: Python or PHP?
In-Reply-To: <WPKdnXeIEOXobPffRVn-iA@comcast.com>
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
	<Xns9641B65EDB2Ccastleamber@130.133.1.4>
	<kEAae.2308$5I5.223369@newshog.newsread.com>
	<WPKdnXeIEOXobPffRVn-iA@comcast.com>
Message-ID: <hlDae.2062$Cz3.271500@monger.newsread.com>

Peter Ammon wrote:
> I'm bewildered why you haven't mentioned magic quotes.  A one line 
> change to the configuration file can render your PHP site almost 
> entirely immune to SQL injection attacks.

PHP's magic quotes is one of the most poorly-designed features I can 
think of. Instead of magically escaping only strings which will actually 
be passed to a database (like Python's DB-API does), it escapes every 
string that comes from the user, meaning that strings which will be sent 
back to the user have to be manually unescaped.

Even worse, since it can be turned on and off, code which is designed 
for a magic_quotes=on environment will become seriously vulnerable when 
moved to an environment with magic_quotes on. Security-related features 
should never be toggleable!


From steven.bethard at gmail.com  Thu Apr 21 10:50:25 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 21 Apr 2005 08:50:25 -0600
Subject: deprecation of has_key?
In-Reply-To: <mailman.2224.1114094137.1799.python-list@python.org>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>
	<mailman.2224.1114094137.1799.python-list@python.org>
Message-ID: <TIKdnV6iPosyIPrfRVn-2w@comcast.com>

Denis S. Otkidach wrote:
> I believe it's a bad idea to remove this method, since behavior of both
> "item in dict" and "for item in dict" (especially the later) in Python
> does't seem sane to me.  Just look at reverse operations:
> 
> dict.fromkeys(seq) <-> d.keys(), d.iterkeys() - OK
> dict(iterable) <-> d.iteritems()              - why not iter(d)?
> dict(l) <-> d.items()                         - why not list(d)?
> dict(seq) <-> d.keys(), d.iterkeys()          - looks very strange.
> 
> And those ("item in dict" and "for item in dict") are related of course,
> since the following should pass:
> 
> for item in d:
>     assert item in d
> 
> That's the reason why I always prefer to use has_key() and iteritems()
> to in and iter().

Huh?  I'm not following your logic.  Why is "item in dict" less readable 
than "dict.has_key(item)"?  Something to do with expecting inverses that 
don't exist?

Personally, I use "item in dict" because it's quite readable to me, and 
generally faster.

STeVe


From bokr at oz.net  Sat Apr  2 16:28:36 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 02 Apr 2005 21:28:36 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
Message-ID: <424f04d0.137947037@news.oz.net>

On Sat, 02 Apr 2005 14:29:08 GMT, Ron_Adam <radam2 at tampabay.rr.com> wrote:

>
>I was having some difficulty figuring out just what was going on with
>decorators.  So after a considerable amount of experimenting I was
>able to take one apart in a way.  It required me to take a closer look
>at function def's and call's, which is something I tend to take for
>granted.
>
I think it might help you to start out with very plain decorators rather than
decorators as factory functions that return decorator functions that wrap the
decorated function in a wrapper function. E.g., (this could obviously be
parameterized as a single decorator factory, but I wanted to show the simplest level
of decorator functionality)

 >>> def decoa(f):
 ...     f.decstr = getattr(f, 'decstr', '') + 'a'
 ...     return f
 ...
 >>> def decob(f):
 ...     f.decstr = getattr(f, 'decstr', '') + 'b'
 ...     return f
 ...
 >>> def decoc(f):
 ...     f.decstr = getattr(f, 'decstr', '') + 'c'
 ...     return f
 ...
 >>> @decoa
 ... @decoc
 ... @decob
 ... @decob
 ... def foo(): pass
 ...
 >>> foo.decstr
 'bbca'

I.e.,

    @decoa
    @decoc
    def foo(): pass

is almost[1] exactly equal to (note calling order c then a)

    def foo(): pass
    foo = decoc(foo)
    foo = decoa(foo)

[1] One difference is that foo = deco(foo) is a RE-binding of foo,
    and the binding wouldn't happen at all if the @deco version
    raised an exception in deco. E.g.,

 >>> def deco(f): raise NotImplementedError
 ...

foo not yet defined:
 >>> foo
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 NameError: name 'foo' is not defined

Try the bad decorator:
 >>> @deco
 ... def foo(): pass
 ...
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 1, in deco
 NotImplementedError

No go, and foo still undefined:
 >>> foo
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 NameError: name 'foo' is not defined

But the other way around:

bar undefined to start:
 >>> bar
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 NameError: name 'bar' is not defined

Define it sucessfully:
 >>> def bar():pass
 ...
 >>> bar
 <function bar at 0x02EE8B54>

Try to decorate the old-fashioned way:
 >>> bar = deco(bar)
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 1, in deco
 NotImplementedError

 >>> bar
 <function bar at 0x02EE8B54>

Still there, defined as before (well, strictly speaking, not
necessarily as before: with bar already defined, deco could
have messed with the existing bar and THEN raised the exception).
Which would also happen with @deco, just that the new binding to bar
wouln't happen.

 >>> def decobomb(f):
 ...     f.bomb = 'bombed'
 ...     raise Exception, 'Did it bomb the existing function?'
 ...
 >>> def foo(): pass
 ...
 >>> vars(foo).keys()
 []
 >>> @decobomb
 ... def foo(): pass
 ...
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 3, in decobomb
 Exception: Did it bomb the existing function?
 >>> vars(foo).keys()
 []

Nope, seems that was a new foo that got bombed and then not
bound to replace the old foo.

 >>> foo.bomb
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 AttributeError: 'function' object has no attribute 'bomb'


>I'm not sure this is 100%, or if there are other ways to view it, but
>it seems to make sense when viewed this way.
I like annotated code walk-throughs. But as others have pointed out,
it's still a bit buggy ;-)

Regards,
Bengt Richter


From mahs at telcopartners.com  Fri Apr  8 02:08:06 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 07 Apr 2005 23:08:06 -0700
Subject: curious problem with large numbers
In-Reply-To: <d355eq$na7$1@sea.gmane.org>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>
	<d355eq$na7$1@sea.gmane.org>
Message-ID: <d356uv$q71$1@sea.gmane.org>

Steve Holden wrote:
> Scott David Daniels wrote:
> 
>> Terry Reedy wrote:
>>
>>> On my Windows machine with 2.2.1, I get exactly what you expected:
>>>
>>>>>> 1e10000
>>>
>>>
>>> 1.#INF
>>> ...
>>> If you get wrong behavior on a later version, then a bug has been 
>>> introduced somewhere, even perhaps in VC 7, used for 2.4.
>>
>>
>>
>> Nope, it is also there for 2.3.4 (May 25 2004, 21:17:02).  This is not
>> necessarily a bug in the sense of a fixable bug; floating point has
>> vagaries that are not necessarily easily controllable from the C source
>> side.
> 
> 
> While this may be true, it's pretty strange that Michael Spencer reports 
> apparently correct results on Windows 2.3.3 and 2.4, and I confirm the 
> Windows 2.4 result on my own system, while you report that 2.3.4 gives 
> an error. Or isn't that what you are reporting?
> 
> A further Windows data point from Cygwin:
> 
> Python 2.4 (#1, Dec  4 2004, 20:10:33)
> [GCC 3.3.3 (cygwin special)] on cygwin
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> 1e10000
> Inf
>  >>>
> 
> regards
>  Steve
I guess the behavior is also hardware-dependent.  FWIW, I tested on an Athlon XP 
box.

Michael



From lucio.torre at gmail.com  Fri Apr 15 19:56:35 2005
From: lucio.torre at gmail.com (lucio.torre at gmail.com)
Date: 15 Apr 2005 16:56:35 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <A4WdnQQUzKq_zv3fRVn-jQ@speakeasy.net>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<A4WdnQQUzKq_zv3fRVn-jQ@speakeasy.net>
Message-ID: <1113609395.016316.202220@f14g2000cwb.googlegroups.com>

Fixed. Thanks.



From jjl at pobox.com  Sun Apr 24 07:44:22 2005
From: jjl at pobox.com (John J. Lee)
Date: 24 Apr 2005 11:44:22 +0000
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<116iir4hq8muc62@corp.supernews.com>
	<200504222027.40280.james@wrong.nu>
	<mailman.2302.1114198274.1799.python-list@python.org>
	<87sm1ilfhr.fsf@pobox.com>
Message-ID: <87sm1gqu09.fsf@pobox.com>

jjl at pobox.com (John J. Lee) writes:
> Shane Hathaway <shane at hathawaymix.org> writes:
[...]
> > However, I haven't heard whether PyQt for Qt 4 will also be available
> > under the GPL.
> 
> Yes, PyQt will be available under the same license as Qt.

Oops, s/license/licenses/


John


From reinhold-birkenfeld-nospam at wolke7.net  Tue Apr 19 09:21:27 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Tue, 19 Apr 2005 15:21:27 +0200
Subject: Variables variable
In-Reply-To: <mailman.2096.1113916800.1799.python-list@python.org>
References: <mailman.2096.1113916800.1799.python-list@python.org>
Message-ID: <3ckeukF6n53cpU1@individual.net>

Adriano Monteiro wrote:
> Hi folks,
> 
> Someone know how to make variables variable like in PHP?
> It's something like this:
> 
> $a = 'hi'
> $$a = 'testing'
> echo $hi
> 'testing'

You are most certainly wanting to use dictionaries.

Or, if you work with attributes of an object, use getattr.

Reinhold


From vze4rx4y at verizon.net  Wed Apr  6 20:35:30 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 07 Apr 2005 00:35:30 GMT
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
Message-ID: <mf%4e.318$Xm3.61@trndny01>

[RickMuller]
> I have to sort a list, but in addition to the sorting, I need to
> compute a phase factor that is +1 if there is an even number of
> interchanges in the sort, and -1 if there is an odd number of
> interchanges.

This sounds like a homework problem but will offer a solution anyway:

>>> phase = 1
>>> def mycmp(x, y):
        global phase
        phase = -phase
        return cmp(x, y)

>>> sorted('abracadabra', cmp=mycmp)
['a', 'a', 'a', 'a', 'a', 'b', 'b', 'c', 'd', 'r', 'r']
>>> phase
-1



Raymond Hettinger




From t.bettio at transnorm.ch  Thu Apr 14 14:44:13 2005
From: t.bettio at transnorm.ch (Tiziano Bettio)
Date: Thu, 14 Apr 2005 20:44:13 +0200
Subject: Socket Error
In-Reply-To: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
References: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
Message-ID: <425EB9FD.3020409@transnorm.ch>

kingofearth.com at gmail.com wrote:

>When I try to open a socket with python i get the following error:
>
>Traceback (most recent call last):
>  File "./mailer", line 3, in ?
>    sock = socket.socket(socket.PF_INET, socket.SOCK_STREAM)
>NameError: name 'socket' is not defined
>
>the code is:
>
>#!/usr/bin/python
>
>sock = socket.socket(socket.PF_INET, socket.SOCK_STREAM)
>sock.connect(("mail.oasd.k12.wi.us", 25))
>sock.send("HELO")
>print sock.recv(8192)
>sock.close()
>
>  
>
tried:
import socket
???


From michael.kearns at REMOVEsaaconsultants.com  Tue Apr 12 04:56:07 2005
From: michael.kearns at REMOVEsaaconsultants.com (Michael Kearns)
Date: Tue, 12 Apr 2005 09:56:07 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <1113264839.497914.210170@z14g2000cwz.googlegroups.com>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz>
	<mailman.1724.1113261387.1799.python-list@python.org>
	<1113264839.497914.210170@z14g2000cwz.googlegroups.com>
Message-ID: <425b8cf7$0$38043$bed64819@news.gradwell.net>

A.B., Khalid wrote:

> Kindly note that the Python source distribution does include project
> files for building Python 2.4 with MSVC6. Add to that the fact that
> with pyMinGW[1] one can build yet another Windows distribution not
> dependent on mscvr71.dll and some of the logic about not upgrading to
> Python 2.4, IMHO, just goes away.
> 
> An official release of installers for either or both versions would I
> think complicate matters: more choices translate to more confusion.
> Needless to say that extension authors (for Python 2.4) would then need
> to make two binaries for every extension they release for Python 2.4:
> one for the mscvr71.dll dependent Python distribution, and another one
> for the mscvrt.dll dependent version(s). This I think would hurt Python
> and its users.
> 
> The solution is to have those that know enough to really need to build
> Python on their own according to their requirments. They would then
> have to deal with compiling the Python 2.4 extensions themselves, of
> course. But this would make things simple and hopefully address the
> needs of everyone.

This is all very true, and a fair point of what is achievable. It just 
seems unfortunate that a developer is required to get involved in C 
compilation and looking after all module dependencies, purely to use 
Python in a commercial environment.

I write Java as my main language. It's what I'm paid to do, and I've 
spent the best part of the last 8 years doing so.

Over the last couple of years, I've been toying with Python, and trying 
to find ways to integrate it with my daily routine - I now have a 
complete internal build system written with it, along with several 
utility scripts.

I don't code C. I could probably blag it at a very slow pace, but I'm 
not going to be given time to play with it. We have some C developers, 
but again, no resource allocation will ever be made to compile a 
language that isn't used for the mainstream software we produce.

All I'm trying to do is use python wherever I can without having to 
persuade those in power that it would be a valuable asset (as this would 
probably be a waste of breath in many circumstances), and yet I can't 
(from 2.4 at least) because it requires more time and cost to be allocated.

I would guess from the responses so far that Python 2.4 just isn't used 
within commercially shipping products, or is quietly used by an product 
so as not to incur any legal wrath that might be found. Perhaps it isn't 
quite ready for what I want to achieve. I don't know.

I just know that I am spending the rest of the day migrating back to 2.3 
where I will stay.

Michael.


From nyamatongwe+gravity at gmail.com  Wed Apr 27 21:56:16 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Thu, 28 Apr 2005 01:56:16 GMT
Subject: win32ui CreateFileDialog SLOW (since the SP2 Windows XP patch?)
References: <1114644362.619393.317800@l41g2000cwc.googlegroups.com>
Message-ID: <MPG.1cdae4d3b1ffa39698968e@news-server>

Kitty:

> Now it can take up to 4 minutes for the file dialog box to appear. No
> problems with speed in PythonWin, of course, but she is not used to
> doing that. Any suggestions? Anyone know why it is so slow?

   I have seen similar issues in the past but mainly on Windows 9x with 
particular start directories for the dialog. Windows tries to remember 
which directory was most recently chosen by each application. Possibly 
it has associated python.exe with a directory on a removed drive, 
network share, or virtual location (like "My Network Places") and takes 
a while to fail over to a working place. 

   Neil


From ruach at chpc.utah.edu  Fri Apr  8 13:41:51 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 11:41:51 -0600
Subject: Can dictionary values access their keys?
In-Reply-To: <mailman.1544.1112978919.1799.python-list@python.org>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
	<mailman.1544.1112978919.1799.python-list@python.org>
Message-ID: <d36fp0$suk$1@vegh.ks.cc.utah.edu>

Steve Holden wrote:
while not impossible (using Python's excellent
> introspection facilities) is way beyond what most people would consider
> practical. Obviously the garbage collector has to solve this problem,
> but you *really* don't want to be doing this stuff in Python unless you
> absolutely *must*.
> 
> regards
>  Steve


Thanks very much for the detailed reply. Let me explain in a little more
detail what I am doing, and perhaps you could let me know if I am going
about it the wrong way.


I am creating an object database to store information about network
devices, e.g. switches and routers.

At the top level there are device objects, every device object contains
a mib object--and other various properties--where the actual data is
stored. The mib object is a dicitionary--or at least subclasses
dictionary--where the key is the oid (a unique string) and the value is
a special object called Datapoint. Datapoints come in two types Static
and Dynamic, and every Datapoint is unique.

So a simple structure looks something like this:

Device1
  Mib1
     {'1.3.6.1':Datapoint-x1,
      '1.3.6.2':Datapoint-y1,
      '1.1.5.4':Datapoint-z1,
      '1.2.7.3':Datapoint-q1}

Device2
  Mib2
     {'1.3.6.1':Datapoint-x2,
      '1.3.6.2':Datapoint-y2,
      '1.1.5.4':Datapoint-z2,
      '1.2.7.3':Datapoint-q2}

In the example Datapoint-xx should be read as, some unique data point in
memory.

The key in the Mib object is important because it is used by the
Datapoint is points to to look up its current value on the given device,
which is why I asked the two questions.

In my program I use snmp to look up values on network devices. i.e. 'Go
find the value of 1.3.6.1 from device1.' I want to be able to say
something like Device1.Mib['1.3.6.1].update(), and the correct Datapoint
discovers its key (oid) and parent device, then executes an snmp query
that looks something like this snmpget(keyThatPointsToSelf,
parentObj.ipAddress, parentObj.paramx)

I know of course I could keep all this in a relational database and do a
bunch of queries, but that would really suck! and I would have to track
all the Devices and oids my self. What I really want is smart objects
that think for me--thats what computers are for, right? ;)

I thought my design was a wonderfuly beautiful use of python an oop, but
perhaps I am mistaken and there is a much more pragmatic way to get the
job done. In the end preformance doesn't matter a lot. The front end
will be web based, so if the db can process faster than http/javascript
and user Bob who has to mouse, then everything will be fine.

Let me know what you think
Thanks much
--Matthew


From simon.brunning at gmail.com  Wed Apr  6 10:01:48 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 6 Apr 2005 15:01:48 +0100
Subject: shebang in cross platform scripts
In-Reply-To: <d30om0$lb4$1@solaris.cc.vt.edu>
References: <d30om0$lb4$1@solaris.cc.vt.edu>
Message-ID: <8c7f10c605040607015d7cb7d5@mail.gmail.com>

On Apr 6, 2005 2:37 PM, rbt <rbt at athop1.ath.vt.edu> wrote:

> Does the line below have any negative impact on Windows machines? I
> develop and test mostly on Unix, but my scripts are often used on Win
> systems too.
> 
> #!/usr/bin/env python

Nope. On Windows it's just a comment.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From bvande at po-box.mcgill.ca  Sat Apr 16 15:27:25 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 16 Apr 2005 15:27:25 -0400
Subject: pydoc preference for triple double over triple single quotes -- any
 reason?
Message-ID: <4261671D.7080404@po-box.mcgill.ca>

Hi all,

I'm posting partly so my problem and solution might be more easily 
found by google, and partly out of mere curiosity.

I've just spent a frustrating bit of time figuring out why pydoc 
didn't extract a description from my module docstrings. Even though I 
had a well formed docstring (one line, followed by a blank line, 
followed by the rest of the docstring), when I ran Module docs, my 
modules showed up as having "no description". ("Module docs" referring 
to the shortcut installed on Windows that launches the pydoc server.)

It turns out that I was using '''triple single quotes''' and pydoc 
only pulls a description out from module docstrings that are formatted 
in """triple double quotes""". I've poked about with google, and 
cannot find any explanation of why pydoc should treat the two cases 
differently. Anyone have an idea?

I do see that both <http://www.python.org/peps/pep-0008.html> -- Style 
Guide for Python Code and <http://www.python.org/peps/pep-0257.html> 
-- Docstring Conventions suggest triple double, so I guess it is my 
fault. But still, those PEP's have the tone of suggestions, and since 
the two quoting schemes are semantically equivalent . . .

I do prefer the look of triple-single, but oh well. My attempts to 
google for an answer didn't come up with anything, so perhaps this 
post will help someone else, if nothing else :-)

Best to all,

Brian vdB



From nyamatongwe+gravity at gmail.com  Wed Apr 20 09:17:15 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Wed, 20 Apr 2005 13:17:15 GMT
Subject: To decode the Subject =?iso-8859-2?Q?=... in email in python
References: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>
Message-ID: <MPG.1cd0ee1761377d1e98968d@news-server>

Dan Polansky:

> When parsing messages using python's libraries email and mailbox, the
> subject is often encoded using some kind of = notation. Apparently, the
> encoding used in this notation is specified like =?iso-8859-2?Q?=... or
> =?iso-8859-2?B?=. Is there a python library function to decode such a
> subject, returning a unicode string? The use would be like
> 
>   human_readable = cool_library.decode_equals(message['Subject'])

   Here is some code from a front end to Mailman moderation pages:

import email.Header
hdr = email.Header.make_header(email.Header.decode_header(sub))

   Neil


From artiegold at austin.rr.com  Sat Apr  2 23:28:27 2005
From: artiegold at austin.rr.com (Artie Gold)
Date: Sat, 02 Apr 2005 22:28:27 -0600
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <87is3663cn.fsf@wilson.rwth-aachen.de>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<87is3663cn.fsf@wilson.rwth-aachen.de>
Message-ID: <3b99ncF6fd2apU1@individual.net>

Torsten Bronger wrote:
> Hall?chen!
> 
> Daniel Silva <dsilva at ccs.neu.edu> writes:
> 
> 
>>Shriram Krishnamurthi has just announced the following elsewhere; it might
>>be of interest to c.l.s, c.l.f, and c.l.p:
>>http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html
>>
>>
>>                The Fate Of LAMBDA in PLT Scheme v300
>>                                 or
>>                  Lambda the Ultimate Design Flaw
>>
>>About 30 years ago, Scheme had FILTER and MAP courtesy of Lisp
>>hackers who missed them from their past experience.  To this
>>collection, Scheme added a lexically-scoped, properly-functioning
>>LAMBDA.  But, despite of the PR value of anything with Guy
>>Steele's name associated with it, we think these features should
>>be cut from PLT Scheme v300.
>>
>>[...]
> 
> 
> The whole text seems to be a variant of
> <http://www.artima.com/weblogs/viewpost.jsp?thread=98196>.
> 
> Tsch?,
> Torsten.
> 
Ya think? ;-)

--ag

-- 
Artie Gold -- Austin, Texas
http://it-matters.blogspot.com (new post 12/5)
http://www.cafepress.com/goldsays


From jeffrey at fro.man  Fri Apr  8 10:44:52 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Fri, 08 Apr 2005 07:44:52 -0700
Subject: compound strip() string problem
References: <hQu5e.3927$5F3.3909@news-server.bigpond.net.au>
Message-ID: <115d67dq70ht7d8@corp.supernews.com>

Dylan Wilson wrote:

> Now i need to compond that string remove the whitespace if you will.Well
> i read up on strip(), lstrip() and rstrip() and all i could deduce was
> that they striped the whitespace from the start and/or end of the
> string.But I tried that anyway and failed.Is there an easier way than i
> did it below?

As Sidharth Kuruvila pointed out, time.strftime() is probably the best
choice for your situation. For the general case of removing whitespace from
a sting, one method is:

''.join(mystring.split())


Jeffrey


From roy at panix.com  Fri Apr 22 08:37:51 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 22 Apr 2005 08:37:51 -0400
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
Message-ID: <roy-F93E58.08375122042005@reader1.panix.com>

iny+news at iki.fi (Ilpo Nyyss?nen) wrote:
> Of course it caches those when running. The point is that it needs to
> recompile every time you have restarted the program. With short lived
> command line programs this really can be a problem.

Are you speculating that it might be a problem, or saying that you have 
seen it be a problem in a real-life program?

I just generated a bunch of moderately simple regexes from a dictionary 
wordlist.  Looks something like:

Roy-Smiths-Computer:play$ head exps
a.*a[0-9]{34}
a.*ah[0-9]{34}
a.*ahed[0-9]{34}
a.*ahing[0-9]{34}
a.*ahs[0-9]{34}
a.*al[0-9]{34}
a.*alii[0-9]{34}
a.*aliis[0-9]{34}
a.*als[0-9]{34}
a.*ardvark[0-9]{34}

Then I ran them through a little script that does:

for exp in sys.stdin.readlines():
    regex = re.compile (exp)

and timed it for various numbers of lines.  On my G4 Powerbook (1 GHz 
PowerPC), I'm compiling about 1000 regex's per second:

Roy-Smiths-Computer:play$ time head -5000 < exps | ./regex.py

real    0m5.208s
user    0m4.690s
sys     0m0.090s

So, my guess is that unless you're compiling 100's of regexes each time you 
start up, the one-time compilation costs are probably not significant.

> And yes, I have read the source of sre.py and I have made an ugly
> module that digs the compiled data and pickles it to a file and then
> in next startup it reads that file and puts the stuff back to the
> cache.

That's exactly what I would have done if I really needed to improve startup 
speed.  In fact, I did something like that many moons ago, in a previous 
life.  See R. Smith, "A finite state machine algorithm for finding 
restriction sites and other pattern matching applications", CABIOS, Vol 4, 
no. 4, 1988.  In that case, I had about 1200 patterns I was searching for 
(and doing it on hardware running about 1% of the speed of my current 
laptop).

BTW, why did you have to dig out the compiled data before pickling it?  
Could you not have just pickled whatever re.compile() returned?


From simon.brunning at gmail.com  Mon Apr  4 06:28:03 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 4 Apr 2005 11:28:03 +0100
Subject: Raise Error in a Module and Try/Except in a different Module
In-Reply-To: <7f285d16.0504040211.1e1b8783@posting.google.com>
References: <7f285d16.0504040211.1e1b8783@posting.google.com>
Message-ID: <8c7f10c60504040328676e5539@mail.gmail.com>

On 4 Apr 2005 03:11:23 -0700, Issa-Ahmed SIDIBE <issa.sidibe at epfl.ch> wrote:
> I Have a function FUNC1 that is define in ModuleA. This function raise
> an exception EXCP1 (raise EXCP1), with EXCP1 a global variable in
> ModuleA.
> 
> In ModuleB, I have some classes that call FUNC1. I would like to catch
> EXCP1 and make some processing. How can I do that.
> 
> I tried in Module B
> 
> import ModuleA
> ...
> class():
>    ...
>    try: a = ModuleA.FUNC1
>    except ModuleA.EXCP1: print 'catch'
> 
> But It does not work. What is wrong?

You're not *calling* FUNC1 here, you're just assigning a reference to
it to the name 'a'. Try FUNC1() instead.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From tjreedy at udel.edu  Fri Apr  1 13:32:21 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 13:32:21 -0500
Subject: Ternary Operator in Python
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
Message-ID: <d2k40v$t3t$1@sea.gmane.org>


"praba kar" <prabapython at yahoo.co.in> wrote in message 
news:20050401072442.73412.qmail at web8408.mail.in.yahoo.com...
> Dear All,
>    I am new to Python.  I want to know how to
> work with ternary operator in Python.  I cannot
> find any ternary operator in Python.  So Kindly
> clear my doubt regarding this

A unary operator has one operand; a binary operator has two operands; a 
ternary operator has three operands.  Python has none built-in, although 
one can 'synthesize' all sorts of ternary operators by combining two binary 
operators, with the operand of one being the result of the other.  However, 
people often don't think of such combinations as being such.

Since C has one builtin ternary 'operator' (if-else), the term 'ternary 
operator' is too often used as a synonym for that particular example of a 
ternary operator.  Others have referred you to discussions of if-else 
expressions in Python.

Ironically, if one thinks of or defines an operator as being a function 
called without parenthesis, then C's ';:' and Python's 'and..or' are not 
really ternary operators but flow control expressions equivalent in effect 
to certain if/else statement pairs.  That is because some of the operands 
may not be evaluated.  That is also why there are no special methods 
corresponding to 'and' and 'or'.  They are directly compiled to conditional 
code with no a function call corresponding to the 'operator'.

Terry J. Reedy





From rkern at ucsd.edu  Thu Apr 14 06:20:02 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 14 Apr 2005 03:20:02 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5sfoj.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1793.1113334936.1799.python-list@python.org>	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1818.1113375260.1799.python-list@python.org>	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1823.1113383437.1799.python-list@python.org>	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1860.1113432730.1799.python-list@python.org>	<slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1881.1113466572.1799.python-list@python.org>	<slrnd5sckl.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1883.1113471781.1799.python-list@python.org>
	<slrnd5sfoj.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3lfu9$5ru$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2005-04-14, Robert Kern schreef <rkern at ucsd.edu>:
> 
>>Antoon Pardon wrote:
>>
>>>Op 2005-04-14, Robert Kern schreef <rkern at ucsd.edu>:
>>>
>>>
>>>>Antoon Pardon wrote:
>>>>
>>>>
>>>>>Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>>>>>
>>>>>I would do that if I were just writing code I thought others could
>>>>>find usefull. I then would feel no problem "burdening" those users
>>>>>with the same kind of license I found in the product I took some
>>>>>code from. But I also think that readers of documentation should
>>>>>be free to use any code included in any way they see fit.
>>>>
>>>>If they have issues with distributing code derived from Python, why are 
>>>>they reading a Python tutorial?
>>>
>>>
>>>Try and look it from a students viewpoint. He is learing languages,
>>>algorithms and so on. Now he is ready to write his own program.
>>>Chances are high that he will rely on examples from the
>>>courses/documentation he read. It is just not practical for someone
>>>like that to figure out all the possible different licenses under
>>>which he can use the examples from the various documenation sources.
>>
>>The PSF License is about as light as they come.
>>
>>
>>>Now if this documentation refers to code from yet another source
>>>with its own license, using it becomes an utter nightmare for
>>>the student, because now he has to figure out which piece of
>>>the code is original from the author of the documentation and
>>>which was copied from the other source.
>>
>>Then write your own code and don't use anyone else's. You can't offer 
>>extra permissions for code that's not yours.
> 
> 
> Well then I'll just have to do that.
> 
> 
>>>Consideration like this, let me come to the conclusion that
>>>code included with documentation should come with no strings
>>>attached for the students to reuse.
>>
>>No such thing, really. Copyright law requires almost as much as the PSF 
>>license. The MIT license is shorter, possibly more easily 
>>understandable, but practically amounts to more-or-less the same thing.
> 
> 
> If I read a tutorial or a course on algorithms both with examples.
> Does copyright law require that I attribute if I reuse code
> from these examples?

If the amount copied is large enough.

> Even if it was pseudo code that I had
> to translate in an actual language.

Probably not. Copyright controls copying (and a few other things, but 
they have less relevance in a software context).

> Suppose some time has passed and I have to write similar code.
> I cant find the documentation but this time I'm experienced
> enough so that I can recreate the code. Do I still need to
> attribute the code?

Again, probably not.

> What if the code is so short that basically everyone that
> solves the problem writes the same kind of code?

No, copyright requires creativity.

Rosen's book should answer these questions for you.

>>In short, don't worry about it. Don't sue people, keep the attributions 
>>intact, and probably no one will care.

Sorry, that list should also have had "follow courteous practices with 
other people's code" which includes listing changes and a reference to 
the license of that code.

> If they don't care, why did they attach such a license in the first
> place.

Lawyers. The original license (the "CNRI License") was much briefer and 
vaguer, although it amounts to the same requirements, practically. The 
PSF license made those requirements, disclaimers, etc. explicit.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From tim.leeuwvander at nl.unisys.com  Mon Apr 11 03:45:08 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 11 Apr 2005 00:45:08 -0700
Subject: PyWin32 COM mailing list / web forum?
Message-ID: <1113205508.055046.276360@f14g2000cwb.googlegroups.com>

Hi,

I have some questions specifically about python win32com extensions,
and I thought it might be more appropriate to ask them on a mailing
list / newsgroup / webforum etc. dedicated to that. But is there such a
thing anywhere? I couldn't find links to it from the pywin32 homepage
or sourceforge-page.

Cheers,

--Tim



From edcjones at comcast.net  Sun Apr 10 12:10:17 2005
From: edcjones at comcast.net (Edward C. Jones)
Date: Sun, 10 Apr 2005 12:10:17 -0400
Subject: numarray.array can be VERY slow
Message-ID: <hYmdnXBeqZ1K0sTfRVn-tg@comcast.com>

#! /usr/bin/env python

"""Should this program take 4.3 seconds to run? I have a Linux PC with
    an AMD Athlon XP 2000+ chip (1.7Gh). I use Python 2.4.1 and numarray
    1.2.3, both compliled from source."""

import time, numarray
from numarray.numerictypes import *

nested = []
for i in range(8):
     inner = []
     for j in range(8):
         inner.append(numarray.ones((256,256), Float64))
     nested.append(inner)
t = time.clock()
arr = numarray.array(nested)
print time.clock() - t


From vze4rx4y at verizon.net  Tue Apr  5 09:13:21 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Tue, 05 Apr 2005 13:13:21 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com>
	<sKe3e.1424$7b.577@trndny01><424db34c.51543105@news.oz.net>
	<Vzl3e.267$7b.220@trndny02><d2o7g8$lc5$01$1@news.t-online.com>
	<_2R3e.3341$7b.3033@trndny06><uqednS7IkJQ69M3fRVn-qQ@comcast.com>
	<eOg4e.2512$7b.37@trndny04><fqqdnVdRvpeXM8zfRVn-2g@comcast.com>
	<Uul4e.2689$7b.1684@trndny04>
	<mailman.1369.1112691118.1799.python-list@python.org>
Message-ID: <R9w4e.5909$7b.2158@trndny01>

> > [Steven Bethard]
> > > So do I read this right in preferring
> > >      [<x> for <y> in <z>]
> > > over
> > >      list(<x> for <y> in <z>)

[Raymond Hettinger]
> > Yes!

[Simon Brunning]
> Why? (Serious question. I'm sure that you have a good reason - I just
> can't figure out what it is.)
>
> The generator expression has the advantage of not leaking references
> into the enclosing namespace. What's advantage of the list comp?

One advantage relates to mental parsing and chunking.
A list comp reads as a single step:  "make a list".
The genexp form reads as "make a generator and turn it into a list."

The listcomp form has slightly more economy of expression (it is succinct) and
the brackets are a nice visual cue that may save a neuron or two.

Another advantage is that listcomps are older.   They tend to be better
understood already.  And, they run on older pythons.

The design rule, "use listcomps to make lists and genexps to make generators",
encourages data centric thinking.With being distracting, it helps maintain an
awareness of whether you're filling memory or
generating elements one-at-a-time.

Internally, there are performance differences favoring listcomps when the
desired output is a list.  List comprehensions are interpreted immediately
through syntax rather than a global lookup of the list() builtin.  The code for
listcomps does not have to create, switch between, and destroy a separate
stackframe.  The compiler creates custom code for list comps that takes
advantage of the new LIST_APPEND opcode.

Partially balancing out all of the above are some small advantages for the
list(somegen) form.  It lets you forget about listcomps and it works with other
contructors, deque(somegen) or set(somegen) for example.

To my tastes, the net balance favors using listcomps whenever you need to create
a list.


Raymond Hettinger






From littlejohn.75 at news.free.fr  Tue Apr 19 14:31:46 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 19 Apr 2005 18:31:46 GMT
Subject: XML-RPC -- send file
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
	<1113930209.259905.112850@o13g2000cwo.googlegroups.com>
	<mailman.2122.1113933410.1799.python-list@python.org>
	<1113933767.439552.169130@g14g2000cwa.googlegroups.com>
Message-ID: <42654e90$0$20628$626a14ce@news.free.fr>

Le 19 Apr 2005 11:02:47 -0700, codecraig a ?crit :
> Experient I have been :)
> 
> Here is what I am getting now....
> 
> CLIENT
> -----------
> d = xmlrpclib.Binary(open("C:\\somefile.exe").read())
open the file with mode "rb"
fin = open(r'C:\somefile.exe', 'rb')
contents = fin.read()
fin.close()
d = xmlrpclib.Binary(contents)

> server.sendFile(d)
> 
> any ideas?
> 


From ojokimu at yahoo.co.uk  Mon Apr  4 20:13:47 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Tue, 5 Apr 2005 01:13:47 +0100 (BST)
Subject: Super Newbie Question
Message-ID: <20050405001347.48469.qmail@web26801.mail.ukl.yahoo.com>


--- John Ridley <ojokimu at yahoo.co.uk> blurted:
> I suppose the simplest thing to do would be to write an empty string
> to the file:
> 
> >>> f = open('tmpfile.txt', 'w')
> >>> f.write('')
> >>> f.close()   # or f.flush(), if keeping open

Apologies - this is, of course, nonsense.

Time for me to hit the sack, I think...


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From bvande at po-box.mcgill.ca  Tue Apr 12 11:23:16 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 12 Apr 2005 11:23:16 -0400
Subject: [OT] Re: Programming Language for Systems Administrator
In-Reply-To: <1113307867.975905.300380@l41g2000cwc.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
	<du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
	<1113307867.975905.300380@l41g2000cwc.googlegroups.com>
Message-ID: <425BE7E4.6020400@po-box.mcgill.ca>

beliavsky at aol.com said unto the world upon 2005-04-12 08:11:

<SNIP>

> I actually like the Windows cmd language (it's an acquired taste), but
> I have read it is going away in Windows Longhorn (WH). That's an
> argument for writing more complicated scripts in Python. WH is supposed
> to get a much better shell, called Monad, inspired by the philosophy of
> Gottfried Wilhelm Leibniz :).

Hi all,

this is the first I've heard of Monad.

Leibniz characterized his monads as the fundamental building blocks of 
nature, insusceptible of change from the outside, and as "windowless".

So, if the account of MS's plans is true, it would seem to indicate a 
combination of arrogance, honesty, and ignorance. (I leave it to you 
to decide which part, if any, of this triad, is surprising.)

Best to all,

Brian vdB



From spiralx at gmail.com  Tue Apr 19 06:29:51 2005
From: spiralx at gmail.com (James)
Date: Tue, 19 Apr 2005 11:29:51 +0100
Subject: Why does python class have not private methods? Will this
	neverchanged?
In-Reply-To: <d42m0t$s26$1@sea.gmane.org>
References: <311b5ce105041902165a0969a0@mail.gmail.com>
	<d42m0t$s26$1@sea.gmane.org>
Message-ID: <7ee3dcd805041903294341f5ba@mail.gmail.com>

Trolls?

On 4/19/05, Fredrik Lundh <fredrik at pythonware.com> wrote:
> "could ildg" <could.net at gmail.com> wrote:
> 
> > Private stuff always makes programming much easier.
> 
> says who?
> 
> </F>
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From tjreedy at udel.edu  Fri Apr  8 18:16:01 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 8 Apr 2005 18:16:01 -0400
Subject: Thoughts on some stdlib modules
References: <d35hul$o4p$1@sea.gmane.org>
Message-ID: <d36vm9$iav$1@sea.gmane.org>


"vegetax" <vegeta.z at gmail.com> wrote in message 
news:d35hul$o4p$1 at sea.gmane.org...
> And those thoughts comes to mind again, if python is such a great 
> language
> why does the stdlib is so bloated with duplication,bad bad library
> design,clumsy to use modules,etc.

Some general responses:
1. The Python lib was not 'designed'.  It has grown over 15 years by 
contributions from numerous authors around the world.
2. Backwards compatibility is a near absolute constraint.  The major 
exception is code dependent on bugs.
3. Enhancing the lib, within that constraint, is a major focus of current 
development work.  (Fixing bugs is another, but that is constant.)  But 
many patches languish because there are not enough volunteers to review 
them.
4. I believe acceptance of new modules is tougher now than some years ago.
5. More help is needed to improve the lib.  Are you volunteering?

>Is it because of legacy code and backwards compatibility or
> because not too much people in the python-dev cares about library design?

I hope I answered that for you.

> Are those issues being considered right now? i cant find any PEP 
> addressing
> the issue especifically, at least cooking it for python 3000.
>
> specific topics could be:
>
> grouping related modules.

I would like this and others have said the same.  Not sure what Guido 
thinks.

> removing useless legacy modules.

like gopherlib?  But how do we know that none of the 100000s of Python 
programmers use it?  Any effort to find out is more effort than leaving it 
alone.  And if the number is greater than 0, how many are you willing to 
disappoint and say 'Tough' to?

> refactoring duplicated functionality.
> removing/redesigning poorly written modules.

Patches welcome within the compatibility constraint.

> adding a module versioning system.

Modules that began and continue as independent projects may have such 
already.  Otherwise, they get the CPython version number.  Or did you mean 
something else?

There are Python 3 topics in the Python wiki that you could add to.  Or go 
ahead and write a PEP,

Terry J. Reedy





From rune.strand at gmail.com  Fri Apr 29 10:05:07 2005
From: rune.strand at gmail.com (runes)
Date: 29 Apr 2005 07:05:07 -0700
Subject: Getting PID for process
In-Reply-To: <mailman.23.1114771542.14961.python-list@python.org>
References: <1114770926.016150.181310@l41g2000cwc.googlegroups.com>
	<mailman.23.1114771542.14961.python-list@python.org>
Message-ID: <1114783507.027246.152720@l41g2000cwc.googlegroups.com>

On XP/2003 at least, 
os.system('taskkill /pid le <pid>') will do.



From greg at cosc.canterbury.ac.nz  Wed Apr 13 23:59:35 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 14 Apr 2005 15:59:35 +1200
Subject: Programming Language for Systems Administrator
In-Reply-To: <d3g80m$2k9$1@swifty.westend.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
	<du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
	<d3g80m$2k9$1@swifty.westend.com>
Message-ID: <3c685iF6jaogjU1@individual.net>

Peter Maas wrote:
> 
> This is only true for trivial bash scripts. I have seen bash scripts
> which were quite hard to read especially for beginners.

I've seen shell scripts which are quite hard to read
even for experts!

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From harlinseritt at yahoo.com  Sat Apr 23 05:49:16 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Apr 2005 02:49:16 -0700
Subject: Question Regarding PIL and PhotoImage classes
Message-ID: <1114249756.229138.204300@l41g2000cwc.googlegroups.com>

Why is that I can only get the PhotoImage class to show up when I write
a straight procedural script (no object orientation) but not when I try
to use object-orientation?

These two scripts in theory should produce the same results but they
don't. Is there any reason why?

---Procedural---

    root = Tk()
    im = Image.open('image.gif')
    photo = ImageTk.PhotoImage(im)

    label = Label(image=photo)
    label.pack()
    root.mainloop()

---Object-Oriented---

from Tkinter import *
import Image, ImageTk

class App:

    def __init__(self, master):
        im = Image.open('dellserver.gif')
        photo = ImageTk.PhotoImage(im)

        label = Label(master, image=photo)
        label.pack()


if __name__ == '__main__':
    root = Tk()
    app = App(root)
    root.mainloop()

---END of CODE---

Thanks,

Harlin Seritt



From miki.tebeka at zoran.com  Mon Apr 25 07:09:53 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Mon, 25 Apr 2005 14:09:53 +0300
Subject: Changing a line in a text file
In-Reply-To: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
Message-ID: <20050425110953.GI3652@zoran.com>

Hello kah,

> How do I change a line in a file??
> 
> For example I have the follwing text in my file:
> 
> line1
> line2
> line3
> line4
> 
> How do I replace 'line2' with 'newline'. Since the write operation in
> python will  overwrite everything.
See http://docs.python.org/lib/module-fileinput.html (inplace=1 is what you
want).

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From dave at pythonapocrypha.com  Thu Apr 14 11:03:52 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Thu, 14 Apr 2005 09:03:52 -0600
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <ssv7e.64636$tE2.4675635@phobos.telenet-ops.be>
References: <d3ekhf$a0f$1@lairds.us>
	<ssv7e.64636$tE2.4675635@phobos.telenet-ops.be>
Message-ID: <425E8658.8020300@pythonapocrypha.com>

Roel Schroeven wrote:
> Simon Brunning wrote:
>>...
> 
> Not that it really matters, but does anybody know why the weekly Python
> news always arrives twice? Does it only happen to me, or does it happen
> to others too?
> 
> It's not that it irritates me or anything, I'm just being curious.

I just thought it was for emphasis.

-Dave


From apardon at forel.vub.ac.be  Thu Apr 21 06:48:18 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 10:48:18 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
Message-ID: <slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-21, Steve Holden schreef <steve at holdenweb.com>:
> beliavsky at aol.com wrote:
>> Terry Hancock wrote:
>> 
>> <snip>
>> 
>>>So I like Python's slicing because it "bites *less*" than intervals
>> 
>> in C or Fortran.
>> 
>> I disagree. Programming languages should not needlessly surprise
>> people, and a newbie to Python probably expects that x[1:3] =
>> [x[1],x[2],x[3]] . Array-oriented languages, such as Fortran 90/95,
>> Matlab/Octave/Scilab, and S-Plus/R do not follow the Python convention,
>> and I don't know of Fortran or R programmers who complain (don't follow
>> Matlab enough to say). There are Python programmers, such as the OP and
>> me, who don't like the Python convention. What languages besides Python
>> use the Python slicing convention?
>> 
> The principle of least surprise is all very well, but "needless surprise 
> of newbies" is a dangerous criterion to adopt for programming language 
> design and following it consistently would lead to a mess like Visual 
> Basic, which grew by accretion until Microsoft realized it was no longer 
> tenable and broke backward compatibility.

>> Along the same lines, I think the REQUIREMENT that x[0] rather than
>> x[1] be the first element of list x is a mistake. At least the
>> programmer should have a choice, as in Fortran or VBA. In C starting at
>> 0 may be justified because of the connection between array subscripting
>> and pointer arithmetic, but Python is a higher-level language where
>> such considerations are less relevant.
>> 
> But Pythonicity required that there should be one obvious way to do 
> something. How obvious is having two ways?

How obvious is that lists can be any length? Do you consider it
an unbounded number of ways, that lists can be any length?

Like users have a choice in how long they make a list, they
should have a choice where the indexes start. (And that
shouldn't be limited to 0 and 1).

> Then when you read code you 
> would continually be asking yourself "is this a one-based or a 
> zero-based structure?", which is not a profitable use of time.

No you wouldn't. If you have the choice you just take the start
index that is more natural. Sometimes that is 0 sometimes that
is 1 and other times it is some whole other number. The times
I had the opportunity to use such structures, the question of
whether it was zero-based or one-based, rarely popped up.
Either it was irrelevant or it was clear from what you were
processing.

That you are forced to use zero-based structures, while the
problem space you are working on uses one-based structures
is a far bigger stumbling block where you continually have
to be aware that the indexes in your program are one off
from the indexes the problem is expressed in.

The one obvious way is to use the same index scheme as the
one that is used in the specification or problem setting.
Not to use always zero no matter what.

-- 
Antoon Pardon


From gsakkis at rutgers.edu  Mon Apr 25 22:37:45 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 19:37:45 -0700
Subject: Quote-aware string splitting
In-Reply-To: <87oec2e1qa.fsf@mrbun.watterson>
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
	<87oec2e1qa.fsf@mrbun.watterson>
Message-ID: <1114483065.551933.68460@f14g2000cwb.googlegroups.com>

> "J. W. McCall" <jmccall at houston.rr.com> writes:
> >
> > I need to split a string as per string.strip(), but with a
> > modification: I want it to recognize quoted strings and return them
as
> > one list item, regardless of any whitespace within the quoted
string.
> >
> > For example, given the string:
> >
> > 'spam "the life of brian" 42'
> >
> > I'd want it to return:
> >
> > ['spam', 'the life of brian', '42']
> >
> > I see no standard library function to do this, so what would be the
> > most simple way to achieve this?  This should be simple, but I must
be
> > tired as I'm not currently able to think of an elegant way to do
this.
> >
> > Any ideas?
>
> How about the csv module? It seems like it might be overkill, but it
> does already handle that sort of quoting
>
>   >>> import csv
>   >>> csv.reader(['spam "the life of brian" 42'], delimiter='
').next()
>   ['spam', 'the life of brian', '42']
>


I don't know if this is as good as CSV's splitter, but it works
reasonably well for me:

import re
regex = re.compile(r'''
                   '.*?' |  # single quoted substring
                   ".*?" |  # double quoted substring
                   \S+      # all the rest
                   ''', re.VERBOSE)

print regex.findall('''
                    This is 'single "quoted" string'
                    followed by a "double 'quoted' string"
                    ''')

George



From matthew_shomphe at countrywide.com  Thu Apr 14 20:48:31 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 14 Apr 2005 17:48:31 -0700
Subject: Socket Error
In-Reply-To: <1113509426.452739.166010@z14g2000cwz.googlegroups.com>
References: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
	<d3mduk$k9b$03$1@news.t-online.com>
	<1113509426.452739.166010@z14g2000cwz.googlegroups.com>
Message-ID: <1113526111.194220.126160@o13g2000cwo.googlegroups.com>


kingofearth.... at gmail.com wrote:
> Thanks everybody, it works now. I thought I needed to do something
like
> that but it didn't show it in the tutorial so I decided to ask here.

Where was the tutorial?  If it's in the Python docs, perhaps you could
submit a patch to fix it ... ;-)

M@



From bucknuggets at yahoo.com  Tue Apr 12 13:06:40 2005
From: bucknuggets at yahoo.com (Buck Nuggets)
Date: 12 Apr 2005 10:06:40 -0700
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<op.so37qgvcqfv3if@localhost>
	<1113311618.838281.205380@l41g2000cwc.googlegroups.com>
	<mailman.1761.1113313532.1799.python-list@python.org>
	<2ctn519amssrp10m6ulo5bkakc6vrv6537@4ax.com>
Message-ID: <1113325600.436778.302960@o13g2000cwo.googlegroups.com>

>> I also tried SAP-DB before.

>        Now known as (or was, last time I checked) "MaxDB by MySQL"

and formerly known as the pre-relational dbms 'Adabas'.  I think the
only reason for its continued existance is that SAP was hoping for a
very low cost, low-end database years ago.  However, the database world
has changed substantially over the last ten years: you can get
postgresql and firebird for nothing, and db2 & oracle are often under
$1000 for a small server.

With that in mind I can't think of a database that's more of a has-been
than maxdb.  Maybe something from the 70s like IMS-DB or Model 204?

buck



From Please  Wed Apr 27 19:42:02 2005
From: Please (Please)
Date: 27 Apr 2005 18:42:02 -0500
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_yo?=
 =?iso-8859-1?q?ur_location=2E_I_want_to_ask_you_the_most_important_questi?=
 =?iso-8859-1?q?on_of_your_life=2E_Your_joy_or_sorrow_for_all_eternity_dep?=
 =?iso-8859-1?q?ends_upon_your_answer=2E_The_question_is=3A_Are_you_saved?=
 =?iso-8859-1?q?=3F_It_is_not_a_question_of_how_good_you_are=2C_nor_if_you?=
 =?iso-8859-1?q?_are_a_church_member=2C_but_are_you_saved=3F_Are_you_sure_?=
 =?iso-8859-1?q?you_will_go_to_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP?=
 =?iso-8859-1?q?=B7POST=B7151?=
References: <1114640110.171596.223260@g14g2000cwa.googlegroups.com>
Message-ID: <2g8071h8e3np64c0tccf8053torm33p8te@4ax.com>

Reports to groups-abuse at google.com, abuse at aol.net, domains at aol.net,
abuse at yahoo.com, abuse at yahoo-inc.com

And do not feed the troll!


From ml at fgranger.com  Fri Apr 15 05:17:03 2005
From: ml at fgranger.com (Fran=?ISO-8859-1?B?5w==?=ois Granger)
Date: Fri, 15 Apr 2005 11:17:03 +0200
Subject: new to mac OS10
In-Reply-To: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
Message-ID: <BE85532F.47F7B%ml@fgranger.com>

Le 15/04/05 1:54, ??Thomas Nelson?? <thn at mail.utexas.edu> a ?crit?:

> I'm on a mac OS X (10.3.8), and I seem to have accidentally destroyed
> the default python installation.  How should I put it on?  Do I need to
> use the unix version?  any help would be greatly appreciated.


There is also a list dedicated to this version of Python:

http://mail.python.org/mailman/listinfo/pythonmac-sig

HTH



From nick at craig-wood.com  Mon Apr 18 07:30:03 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 18 Apr 2005 11:30:03 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<1113430615.592715.78440@f14g2000cwb.googlegroups.com>
	<slrnd5t1ii.rds.nick@irishsea.home.craig-wood.com>
	<1113495726.884203.326670@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd6742v.jak.nick@irishsea.home.craig-wood.com>

mensanator at aol.com <mensanator at aol.com> wrote:
>  Nick Craig-Wood wrote:
> > mensanator at aol.com <mensanator at aol.com> wrote:
> > >  I'm using GMPY (see code).
> > [snip]
> >
> > If you are using gmpy you might as well do it like this.....
> >
> > gmpy.pi() uses the Brent-Salamin Arithmetic-Geometric Mean formula
> > for
> > pi IIRC.  This converges quadratically, and it will calculate you a
> > million places without breaking a sweat.
> 
>  It would be nice if that were documented. What do I have to do, go get
>  the documentation for the original GMP to find out what else is in GMPY
>  that they didn't include in the doc file?

"pydoc gmpy" works for me.  Not sure how you use pydoc on windows, but
you can do this...

>>> import gmpy
>>> help(gmpy)
Help on module gmpy:

NAME
    gmpy

FILE
    /usr/lib/python2.3/site-packages/gmpy.so
[snip]
Help on built-in function pi:

pi(...)
    pi(n): returns pi with n bits of precision in an mpf object
[snip]

The original gmp documentation is sensible also, since gmpy is really
just a thin wrapper to it.  There is also the gmp source code too.

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


From removethis.kartic.krishnamurthy at gmail.com  Mon Apr 25 19:13:14 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Mon, 25 Apr 2005 23:13:14 GMT
Subject: Parsing data from URL
In-Reply-To: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>
References: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>
Message-ID: <eQebe.633$6z3.398@newssvr33.news.prodigy.com>

"The Great 'Harlin Seritt' uttered these words" on 4/24/2005 8:24 PM:
> How can I make sure that I get the actual html data instead of the data
> from redirected URL?
> 
> thanks,
> 
> Harlin
> 

Harlin,

I am not sure I understand what you are asking but please see if the 
below mentioned link will help you. I am just sending the URL that I 
believe is relevant to you. You may want to read the entire chapter if 
you are interested.

http://diveintopython.org/http_web_services/redirects.html

(Dive into Python's Chapter 11.7. Handling redirects)

Thanks,
-Kartic


From abuse at solumslekt.org  Sat Apr 23 19:35:31 2005
From: abuse at solumslekt.org (Leif Biberg Kristensen)
Date: Sun, 24 Apr 2005 01:35:31 +0200
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org>	<IFEpEp.7Gz@bath.ac.uk>
	<mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
Message-ID: <3d04e3F6pjhi5U1@individual.net>

Leif K-Brooks skrev:

> But Python's DB-API (the standard way to connect to an SQL database
> from Python) makes escaping SQL strings automatic. You can do this:
> 
> cursor.execute('UPDATE foo SET bar=%s WHERE id=%s', ["foo'bar", 123])

So. I've been writing SQL queries in Python like this, using PostgreSQL
and psycopg:

cursor.execute("select * from foo where bar=%s" % baz)

Is that wrong, and how should I have been supposed to know that this is
bad syntax? No doc I have seen actually has told me so.
-- 
Leif Biberg Kristensen
http://solumslekt.org/


From lothar at ultimathule.nul  Tue Apr  5 12:10:12 2005
From: lothar at ultimathule.nul (lothar)
Date: Tue, 5 Apr 2005 16:10:12 -0000
Subject: re module non-greedy matches broken
References: <mailman.1308.1112637220.1799.python-list@python.org><1153658nrs82j13@corp.supernews.com>
	<d2tc04$84s$1@news.web.de>
Message-ID: <1155e6jgesiik5d@corp.supernews.com>

a non-greedy match - as implicitly defined in the documentation - is a match
in which there is no proper substring in the return which could also match
the regex.

you are skirting the issue as to why a matcher should not be able to return
a non-greedy match.

there is no theoretical reason why it can not be done.



"Andr? Malo" <auch-ich-m at g-kein-spam.com> wrote in message
news:d2tc04$84s$1 at news.web.de...
> * "lothar" <lothar at ultimathule.nul> wrote:
>
> > no - in the non-greedy regex
> >   <1st-pat><not-1st-pat>*?<follow-pat>
> >
> > <1st-pat>, <not-1st-pat> and <follow-pat> are arbitrarily complex
patterns.
>
> The "not" is the problem. Regex patterns are expressed positive by
> definition (meaning, you can say, what you expect, but not what you
> don't expect). In other words, regexps were invented to define (uh...
regular)
> sets, nothing more (especially you can't define "non-sets"). So the usual
> way is to define the set you've called '<not-1st-pat>*?' and describe
> it as regex. Modern regular expression engines (which are no longer
regular
> by the way ;-) allow shortcuts like negative lookahead assertions and the
> like.
>
> I want to make clear, that it isn't, that nobody _wants_ to give an advice
> how to express your pattern in general. The point is, that there's no
> real syntax for it. It depends on how your <1st-pat> and <follow-pat> look
> like. Chances are, that's even not expressable in one regex (depends on
> the complexity and kind of the set they define).
> Each pattern you write is special to the particular use case.







From martin at v.loewis.de  Sun Apr  3 17:59:51 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 03 Apr 2005 23:59:51 +0200
Subject: Docorator Disected
In-Reply-To: <mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
	<mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
Message-ID: <42506757.1010404@v.loewis.de>

Ron_Adam wrote:
> This would be the same without the nesting:
> 
> def foo(xx):
>     global x
>     x = xx
>     return fee
> 
> def fee(y):
>     global x
>     return y*x
> 
> z = foo(2)(6)

Actually, it wouldn't.


 >>> def foo(xx):
...   global x
...   x = xx
...   return fee
...
 >>> def fee(y):
...   global x
...   return y*x
...
 >>> z=foo(2)
 >>> x=8
 >>> z(6)
48

So the global variable can be changed between the time foo returns
and the time fee is invoked. This is not the same in the nested function
case: the value of x would be bound at the time foo is called. It can
be modified inside foo, but freezes once foo returns.

>>So if you are seeing (2)(6) as something to pass, as opposed to a sequence of operations, I think there's
>>a misconception involved. Perhaps I am taking your words askew ;-)
> 
> 
> It's not entirely a misconception. Lets see where this goes...
> 
> 
>>>>>dis.dis(compiler.compile('foo(2)(6)','','eval'))
>>
>>  1           0 LOAD_NAME                0 (foo)
>>              3 LOAD_CONST               1 (2)
>>              6 CALL_FUNCTION            1
>>              9 LOAD_CONST               2 (6)
>>             12 CALL_FUNCTION            1
>>             15 RETURN_VALUE

Hmm. If you think that this proves that (2)(6) is being *passed*, you
still might have a misconception. What this really does is:

0. Put foo on the stack. Stack is [value of foo]
3. Put 2 on the stack -> [value of foo, 2]
6. Call a function with one arg; invoking foo(2)
    Put the result of this call back on the stack ->
    [result of foo(2)]
9. Put 6 on the stack -> [result of foo(2), 6]
12. Call it, computing (result of foo(2))(6)
     Put the result on the stack ->
     [result of (result of foo(2))(6)]
13. Return top-of-stack, yielding foo(2)(6)

So at no point in time, (2)(6) actually exists. Instead,
when the 6 is being put onto the stack, the 2 is already gone.
It computes it one by one, instead of passing multiple sets
of arguments.

> While all of this isn't relevant, it's knowledge in my mind, and
> effects my view of programming sometimes.

There is nothing wrong with that. However, you really should try
to see what the interpreter actually does, instead of speculation
(of course, asking in a newsgroup is fine).

> The calling routine, puts (passes) the second set of arguments onto
> the stack before calling the function returned on the stack by the
> previous call.

Sure - you need the arguments to a function before being able to
call the function. So there is always a set of arguments on the
stack, which internally indeed gets converted into a tuple right
before calling the function. However, at no point in time, there
are *two* sets of arguments.

> Or it could be said equally the functions (objects) are passed with
> the stack. So both view are correct depending on the view point that
> is chosen.

Maybe I don't understand your view, when you said

# No, I did not know that you could pass multiple sets of arguments to
# nested defined functions in that manner.

However, they way I understood it, it seemed incorrect - there are
no multiple sets of arguments being passed, atleast not simultaneously.
It is, of course, possible to pass multiple sets of arguments
sequentially to multiple functions, eg.

a = len(x)
b = len(y)

Regards,
Martin


From RonGrossi382737 at yahoo.com  Thu Apr 21 11:43:41 2005
From: RonGrossi382737 at yahoo.com (RonGrossi382737 at yahoo.com)
Date: 21 Apr 2005 08:43:41 -0700
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_your_?=
	=?iso-8859-1?q?location=2E_I_want_to_ask_you_the_most_important_qu?=
	=?iso-8859-1?q?estion_of_your_life=2E_Your_joy_or_sorrow_for_all_e?=
	=?iso-8859-1?q?ternity_depends_upon_your_answer=2E_The_question_is?=
	=?iso-8859-1?q?=3A_Are_you_saved=3F_It_is_not_a_question_of_how_go?=
	=?iso-8859-1?q?od_you_are=2C_nor_if_you_are_a_church_member=2C_but?=
	=?iso-8859-1?q?_are_you_saved=3F_Are_you_sure_you_will_go_to_Heave?=
	=?iso-8859-1?q?n_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST=B7146?=
Message-ID: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>


The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrongdoing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

Jesus said, "I am the way, the truth and
the life: no one can come to the
Father(God)(in Heaven), but by me."
(John 14:6)

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi

*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!

____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.biblegateway.com


____________________________________________________



From saint.infidel at gmail.com  Tue Apr 26 16:37:29 2005
From: saint.infidel at gmail.com (infidel)
Date: 26 Apr 2005 13:37:29 -0700
Subject: Getting the sender widget's name in function (Tkinter)
In-Reply-To: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
Message-ID: <1114547849.644971.191270@f14g2000cwb.googlegroups.com>

from Tkinter import Tk, Button

def say_hello(event):
    print 'hello!'
    print event.widget['text']

root = Tk()
button1 = Button(root, text='Button 1')
button1.bind('<Button-1>', say_hello)
button1.pack()
button2 = Button(root, text='Button 2')
button2.bind('<Button-1>', say_hello)
button2.pack() 
root.mainloop()



From vvikram at stanford.edu  Fri Apr  1 02:47:27 2005
From: vvikram at stanford.edu (Vikram)
Date: Thu, 31 Mar 2005 23:47:27 -0800
Subject: __init__ method and raising exceptions
In-Reply-To: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
References: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
Message-ID: <Pine.GSO.4.44.0503312343170.26126-100000@epic19.Stanford.EDU>

> I can't use 'break' or 'continue' in a class method, nor can I return a
> boolean value from __init__() to check for errors within the for-loop.
> How would I be able to stop the current iteration and continue with the
> next after reporting an error?

maybe i don't fully understand your qn but why don't you let __init__ of
your class raise an exception and then catch it in the outer for loop and
continue. something like:

for i in ...
  try:
    foo()
  except:
    continue

			Vikram



From klaus at seistrup.dk  Mon Apr 11 01:35:57 2005
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Mon, 11 Apr 2005 05:35:57 +0000 (UTC)
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd5k35t.rjl.klaus@main.szn.dk>

ajikoe at gmail.com wrote:

> I need to build table which need searching data which needs more
> power then dictionary or list in python, can anyone help me what
> kind of database suitable for python light and easy to learn. Is
> mySQL a nice start with python ?

You could try SQLite for Python: <http://pysqlite.org/>.

Cheers,

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From reinhold-birkenfeld-nospam at wolke7.net  Thu Apr 21 06:07:48 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Thu, 21 Apr 2005 12:07:48 +0200
Subject: goto statement
In-Reply-To: <426767FD.5050104@i.com.ua>
References: <mailman.2158.1113989043.1799.python-list@python.org>
	<dqCdneMCDr764fvfRVn-tA@powergate.ca> <426767FD.5050104@i.com.ua>
Message-ID: <3cpcfmF6n6g9bU2@individual.net>

Maxim Kasimov wrote:

>    1) goto exempts from necessity to install new software
> (it is critical for remote working, for example, installing X11 may be
> impossible at all)

Attributing the need for a language feature to restrictions of your ambience
is hilarious.

Reinhold


From turkaye at ldre.Vanderbilt.Edu  Tue Apr 26 15:53:14 2005
From: turkaye at ldre.Vanderbilt.Edu (Emre Turkay)
Date: Tue, 26 Apr 2005 14:53:14 -0500
Subject: Python internal design
Message-ID: <pan.2005.04.26.19.53.14.623507@ldre.Vanderbilt.Edu>

Hi Folks,

I am designing a tool, in which there are dynamic types and
variables with these types. In this respect, it is more like an
interpreted language design.

I wonder how these issues are implemented in Python are there any
documents or articles about it, which I can read and get an idea.

Thanks,

emre


From ville at spammers.com  Mon Apr 25 02:49:50 2005
From: ville at spammers.com (Ville Vainio)
Date: 25 Apr 2005 09:49:50 +0300
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<du7zmvn24gi.fsf@mozart.cc.tut.fi>
	<Xns9642BBB29D7FFcastleamber@130.133.1.4>
Message-ID: <du77jiric4x.fsf@amadeus.cc.tut.fi>

>>>>> "John" == John Bokma <postmaster at castleamber.com> writes:

    John> Who told you Perl can't do exceptions?

Back when I learned (heh, I never 'really' learned, but knew enough to
write programs in it) perl, almost every function call was followed by

or die("blah");

i.e. the user had to check the error code. If the function would have
raised an exception instead, such check would be redundant because it
would never be executed.

In Python, all error conditions raise exceptions. If python
'supported' exceptions but standard library functions didn't raise
them, the feature would not be worth much.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From mirnazim at gmail.com  Mon Apr 18 10:39:07 2005
From: mirnazim at gmail.com (Mir Nazim)
Date: 18 Apr 2005 07:39:07 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
Message-ID: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>

Hi there.

I am about to undertake a project. My employer wants it to be developed
in PHP. While I was thinking that Python will be better for this job.

The project will implement the functionality similar to Yahoo360
(http://www.360.yahoo.com), http://www.Tribe.net, Orkut etc.

1) There will be a groups like functionality like google groups.
2) Groups/personal blogs/albums/events/buddy lists etc. need to be
implemented.
3) Most importantly it needs to be implemented like platform. that is
it has to expose API or web services so that application implemented on
it can talk to each other and other applications can talk to it.

My employer wants to go with PHP because almost all the functionality
is available with a Drupal CMS for PHP. But it is important to note
that for an application, rather a platform, which is intended to be
used for a long time, time to implement should not be the major
criteria above good design and maintainability(in which python scores
highest).

IMHO Zope3/Quixote seem to be the obvious choice here. Though
functionality is not available on them but i think time spent now will
be gained by gains in better design and maintainable code base.

Now I want this wonderful c.l.py community to pour in their suggestions
on what would be better alternatives. Also may we try various
combinations of frameworks like Zope3 for components, Twisted2.0 for
network functionality etc.

PS: I am leaving out Zope2.x and Twisted1.x as a lot has changed in
newer versions and I don't want to be hanged when Zope3 becomes
official.

Thanks 

---
Mir Nazim



From tlassagn at napanet.net  Tue Apr  5 15:21:30 2005
From: tlassagn at napanet.net (T.D. Lassagne)
Date: Tue, 5 Apr 2005 12:21:30 -0700
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<87is3663cn.fsf@wilson.rwth-aachen.de>
	<3b99ncF6fd2apU1@individual.net>
	<3g_3e.134005$dP1.471451@newsc.telia.net>
Message-ID: <MPG.1cbc851a10cc76ad9896c1@news.dsl.napanet.net>

In article <3g_3e.134005$dP1.471451 at newsc.telia.net>, 
sunnan at handgranat.org says...
> Artie Gold wrote:
> > Torsten Bronger wrote:
> >> The whole text seems to be a variant of
> >> <http://www.artima.com/weblogs/viewpost.jsp?thread=98196>.
> >>
> >> Tsch??,
> >> Torsten.
> >>
> > Ya think? ;-)
> 
> Heh. I was glad that Torsten pointed it out; I didn't get what was funny 
> about the joke until then.

Please consider joining the International Sarcasm Society.  Our motto is 
"Like We Need YOUR Support". 

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From fredrik at pythonware.com  Tue Apr 12 15:28:28 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 21:28:28 +0200
Subject: variables exist
References: <9622d535.0504110552.1e070e8d@posting.google.com>	<d3e0jj$93d$1@sea.gmane.org>	<mailman.1703.1113237192.1799.python-list@python.org>	<d3g2fb$76m$1@blackmamba.itd.rl.ac.uk><mailman.1775.1113323764.1799.python-list@python.org>
	<425c1353$1@nntp0.pdx.net>
Message-ID: <d3h7ar$4au$1@sea.gmane.org>

Scott David Daniels wrote:
> >... STeVe stressed that the try/except solution is only really
appropriate

> > for cases where the failure to have the variable defined is quite rare.
>
> Beware: C++ and Java have an immense overhead for exceptions.  Python
> has a very lightweight exception mechanism.  You should _very_seldom_
> choose exceptions or not on the basis of performance without measuring
> the actual use; you are sure to be surprised.
>
> Structure your code to be easiest to understand.  _If_ it is too slow,
> investigate ways to improve its performance.  The usual way is to
> build better data structures and use better algorithms.  Only in the
> core of a frequently used inner loop should you even care about the
> cost of exceptions.

you haven't really read this thread, have you?

</F>





From t.bettio at transnorm.ch  Thu Apr 14 17:24:53 2005
From: t.bettio at transnorm.ch (Tiziano Bettio)
Date: Thu, 14 Apr 2005 23:24:53 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <200504142221.41290.james@wrong.nu>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>	<d3ml4c$crn$1@sea.gmane.org>
	<425EDE12.3030208@transnorm.ch> <200504142221.41290.james@wrong.nu>
Message-ID: <425EDFA5.2010702@transnorm.ch>

R. C. James Harlow wrote:

>On Thursday 14 April 2005 22:18, Tiziano Bettio wrote:
>
>  
>
>>Actually your script doesn't work on my python distribution...
>>    
>>
>
>Works fine here - did you decompress the first bit of the python executable? 
>You have to do that before Fredrick's script works...
>  
>
well i tried, but i don't have enough diskspace... my 4.67TerraByte are 
just 98.889 ExaByte short to complete the task

;)


From mnations at gmail.com  Fri Apr 22 21:51:54 2005
From: mnations at gmail.com (Mudcat)
Date: 22 Apr 2005 18:51:54 -0700
Subject: Confusing: Canvas image working in function but not in class
In-Reply-To: <1114120377.568827.294120@z14g2000cwz.googlegroups.com>
References: <1114120377.568827.294120@z14g2000cwz.googlegroups.com>
Message-ID: <1114221114.617211.249470@z14g2000cwz.googlegroups.com>

I will answer my own question in case anyone else ever has this
problem.

I knew the problem (although some say it's not) existed with the
namespace of pictures, that if you didn't save the pictures in
persistent memory they would disappear as soon as the function that
called them was exited. So a while ago I went through this and fixed it
by saving all my pictures and widgets that held them as class objects.

However, apparently I was causing the same thing to happen by not
saving the class instance as an object of the class that called it. So
this fixed it:

    def uts5100(self):
        self.sys5100 = UTS5100( self.master )



From syd.diamond at gmail.com  Thu Apr  7 18:27:06 2005
From: syd.diamond at gmail.com (syd)
Date: 7 Apr 2005 15:27:06 -0700
Subject: within a class, redefining self with pickled file
Message-ID: <1112912826.542938.48500@o13g2000cwo.googlegroups.com>

def unpickle(self):
  self = pickle.load(open(self.getFilePath('pickle')))

This evidently does not work.  Any idea why?  I'd like to be able to
replace a lightly populated class (enough to identify the pickled
version correctly) with it's full version that's sitting pickled in a
file.

As of right now, I need to just return self and redefine the class.

Thanks!



From harlinseritt at yahoo.com  Fri Apr 29 21:03:31 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 29 Apr 2005 18:03:31 -0700
Subject: Killing process
Message-ID: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>

I am using os.getpid() to get the pid value for a script running. I
store that value (as a string) to a file. Later when I try to kill that
pid (i pull this from the file as a string value) I get  errors.

Using the following lines I get the subsequent error.

(pid is a string value)
win32api.TerminateProcess(int(pid), 0)

OR

ctypes.windll.kernel32.TerminateProcess(int(pid), 0)

Errors:

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python23\lib\lib-tk\Tkinter.py", line 1345, i
    return self.func(*args)
  File "vngconsole.py", line 27, in StopVngSvc
    win32api.TerminateProcess(int(pid), 0)
error: (6, 'TerminateProcess', 'The handle is invalid.')

How exactly do I kill a pid using a string value?



From della at toglimi.linux.it  Wed Apr  6 14:07:45 2005
From: della at toglimi.linux.it (Matteo Dell'Amico)
Date: Wed, 06 Apr 2005 18:07:45 GMT
Subject: Python Cookbook, 2'nd. Edition is published
In-Reply-To: <LrednfD1AsyBstXfRVn-pQ@comcast.com>
References: <1111973347.202875.256730@l41g2000cwc.googlegroups.com>
	<LrednfD1AsyBstXfRVn-pQ@comcast.com>
Message-ID: <RzV4e.49738$zZ1.1433822@twister1.libero.it>

Larry Bates wrote:

> I received my copy on Friday (because I was a contributor).
> 
> I wanted to thank Alex, Anna, and David for taking the time to put
> this together.  I think it is a GREAT resource, especially for
> beginners.  This should be required reading for anyone that
> is serous about learning Python.

+1.

The Python Cookbook is really great, and being included in the 
contributors, even if for a little tiny idea that got heavily 
refactored, feels wonderful. I'm really grateful to the python community.
-- 
Ciao,
Matteo


From python_only at yahoo.com  Tue Apr 26 03:15:09 2005
From: python_only at yahoo.com (python_only)
Date: 26 Apr 2005 00:15:09 -0700
Subject: Simple, elegant, pythonic solution for switch statement
Message-ID: <1114499709.437575.266630@z14g2000cwz.googlegroups.com>

Check it out!

Readable switch construction without lambdas or dictionaries:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410692



From matthew_shomphe at countrywide.com  Thu Apr  7 21:00:56 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 7 Apr 2005 18:00:56 -0700
Subject: text processing problem
In-Reply-To: <d34j31$nu6$1@domitilla.aioe.org>
References: <d34a7f$gnd$1@domitilla.aioe.org>
	<1112915641.663333.175260@f14g2000cwb.googlegroups.com>
	<d34j31$nu6$1@domitilla.aioe.org>
Message-ID: <1112922056.365893.307550@f14g2000cwb.googlegroups.com>


Maurice LING wrote:
> Matt wrote:
> >
> >
> > Try this:
> > import re
> > my_expr = re.compile(r'(\w+) (\(\1\))')
> > s = "this is (is) a test"
> > print my_expr.sub(r'\1', s)
> > #prints 'this is a test'
> >
> > M@
> >
>
> Thank you Matt. It works out well. The only think that gives it
problem
> is in events as "there  (there)", where between the word and the same

> bracketted word is more than one whitespaces...
>
> Cheers
> Maurice


Maurice,
I'd HIGHLY suggest purchasing the excellent <a
href="http://www.oreilly.com/catalog/regex2/index.html">Mastering
Regular Expressions</a> by Jeff Friedl.  Although it's mostly geared
towards Perl, it will answer all your questions about regular
expressions.  If you're going to work with regexs, this is a must-have.

That being said, here's what the new regular expression should be with
a bit of instruction (in the spirit of teaching someone to fish after
giving them a fish ;-)   )

my_expr = re.compile(r'(\w+)\s*(\(\1\))')

Note the "\s*", in place of the single space " ".  The "\s" means "any
whitespace character (equivalent to [ \t\n\r\f\v]).  The "*" following
it means "0 or more occurances".  So this will now match:

"there  (there)"
"there (there)"
"there(there)"
"there                                          (there)"
"there\t(there)" (tab)
"there\t\t\t\t\t\t\t\t\t\t\t\t(there)"
etc.

Hope that's helpful.  Pick up the book!

M@



From harlinseritt at yahoo.com  Sun Apr 24 23:03:36 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Apr 2005 20:03:36 -0700
Subject: Multiple tuples for one for statement
Message-ID: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>

I have three tuples of the same size: tup1, tup2, tup3

I'd like to do something like this:

for a,b,c in tup1, tup2, tup3:
   print a
   print b
   print c

Of course, you get an error when you try to run the pseudocode above.
What is the correct way to get this done?

Thanks,

Harlin



From jeffrey at fro.man  Mon Apr 25 22:40:44 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Mon, 25 Apr 2005 19:40:44 -0700
Subject: Quote-aware string splitting
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
Message-ID: <116rahd5t0lq85e@corp.supernews.com>

J. W. McCall wrote:

> For example, given the string:
> 
> 'spam "the life of brian" 42'
> 
> I'd want it to return:
> 
> ['spam', 'the life of brian', '42']

The .split() method of strings can take a substring, such as a quotation
mark, as a delimiter. So a simple solution is:

>>> x = 'spam "the life of brian" 42'
>>> [z.strip() for z in x.split('"')]
['spam', 'the life of brian', '42']


                        Jeffrey


From Mark.English at liffe.com  Mon Apr 25 10:44:41 2005
From: Mark.English at liffe.com (Mark English)
Date: Mon, 25 Apr 2005 15:44:41 +0100
Subject: What do list comprehensions do that generator expressions don't?
Message-ID: <40E605146701DE428FAF21286A97D3090457E42F@wphexa02.corp.lh.int>

> Date: Mon, 25 Apr 2005 08:51:17 -0500
> From: Mike Meyer <mwm at mired.org>

> Which means that the real rule should be always use generator
expressions,
> unless you *know* the expression will always fit in memory.

> Which leads to the obvious question of why the exception.
<code>
>>> l = [(1, 2), ('a', 'b'), (3, 2), (23, 32)]
>>> l
[(1, 2), ('a', 'b'), (3, 2), (23, 32)]
</code>
This screen dump of the object is quite useful to me.

<code>
>>> r = reversed(l)
>>> r
<listreverseiterator object at 0x009D2B90>
</code>
This screen dump of the object is less useful to me.

>From a pure programming point of view it's not a sufficient reason to
keep list comprehensions, especially as the interpreter shell could be
massaged into giving more output, but right here right now it's a lot
easier to read the former than the latter IMHO.

(That is assuming I'm right in assuming functions like "reversed" are
generator expressions).

Mark



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From mauriceling at acm.org  Sat Apr 30 00:56:56 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sat, 30 Apr 2005 14:56:56 +1000
Subject: "implementation" of PEP 262 as an academic project
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
	<42719DFF.5080504@acm.org>
	<1114781419.288939.30840@z14g2000cwz.googlegroups.com>
	<4272CE91.5080908@acm.org>
Message-ID: <42731018.5060700@acm.org>

Hi all,

I reckoned that if I'm on this work, I might as well make it into an 
academic engineering-type project for my pass degree. Hence, I am 
sending this posting out to everyone to inform of my intentions. Despite 
the possible interests in this work, academic requires a 'personal' 
project with defined work.

Of course, I do hope that comments and suggestions continue to flow like 
milk and honey. If in event I do decide against making it into an 
academic project or when it had cease to be academically-focused (i.e. 
submitted and passed my thesis), I will have the onus to inform everyone 
again through comp.lang.python (python-list) and catalog-sig mailing list.

Thank you everyone for your kind understanding.

Cheers
Maurice


> Hi,
> 
> I've just read PEP 262 last night and finds that it does more or less 
> describes what I have in mind. However, I am not sure if there is every 
> need for such a descriptive database file or something slimmer, like 
> Fink's .info files will suffice.
> 
> An example of Fink's .info file is:
> ====================================================
> Package: g77
> Version: 3.4.1
> Revision: 1
> BuildDependsOnly: true
> Source: mirror:gnu:gcc/gcc-%v/gcc-%v.tar.bz2
> Source-MD5: 31b459062499f9f68d451db9cbf3205c
> NoSourceDirectory: True
> ConfigureParams: --enable-languages=f77 --infodir='${prefix}/share/info' 
> --libexecdir='${prefix}/lib' --disable-shared
> #BuildDepends: dejagnu
> PatchScript: <<
>  #!/bin/sh
>  cd gcc-%v/gcc
>  mv Makefile.in Makefile.in.orig
>  sed 's|$(ALL_CPPFLAGS) $(INCLUDES)|$(INCLUDES) $(ALL_CPPFLAGS)|g' < 
> Makefile.in.orig > Makefile.in
> <<
> CompileScript: <<
>  #!/bin/sh
>  mkdir darwin
>  cd darwin
>  ../gcc-%v/configure %c
>  make CFLAGS='-O' LIBCFLAGS='-g -O2' LIBCXXFLAGS='-g -O2 
> -fno-implicit-templates' profiledbootstrap
> #cd gcc; make check-g77
> <<
> InstallScript: <<
>  #!/bin/sh
>  cd darwin
>  make install prefix=%i
>  cd %i/bin
>  /bin/rm -f gcc gccbug cpp gcov powerpc-apple*
>  ln -s %p/bin/g77 f77
>  darwinvers=`/usr/bin/uname -v | cut -f1 -d":" | awk '{print $4}'`
>  gccvers=`%i/bin/g77 -dumpversion | head -1 | cut -f4 -d" "`
>  ln -s 
> %p/lib/gcc/powerpc-apple-darwin${darwinvers}/${gccvers}/include/g2c.h 
> %i/include/g2c.h
>  /bin/rm -rf %i/share/locale %i/man
>  /bin/rm -f %i/lib/charset.alias
>  /bin/rm -f %i/share/info/gcc* %i/share/info/cpp*
>  /bin/mv -f %i/lib/libiberty.a %i/lib/libiberty-g77.a
> <<
> License: GPL
> DocFiles: gcc-%v/gcc/f/ChangeLog gcc-%v/COPYING gcc-%v/COPYING.LIB
> Description: GNU Fortran compiler
> DescDetail: <<
>  g77 consists of several components:
> 
>  1) The g77 command itself.
>  2) The libg2c run-time library.  This library contains the
>     machine code needed to support capabilities of the Fortran
>     language that are not directly provided by the machine code
>     generated by the g77 compilation phase.
>  3) The compiler itself, internally named f771.
>     f771 does not generate machine code directly --
>     it generates assembly code, leaving the conversion to
>     actual machine code to an assembler, usually named as.
> 
>  g77 supports some fortran90 features, like automatic arrays,
>  free source form, and DO WHILE.
> <<
> DescPort: <<
>  Installs g77 from the FSF gcc distribution.
> 
>  This version does not install in /usr. It contains it's own cc1 and
>  libgcc.a installed in %p.
> 
>  libiberty.a moved to libiberty-g77.a to avoid conflict with ddd.
> <<
> DescUsage: <<
>  If you get unresolved symbol '_saveFP', add -lcc_dynamic when linking.
> 
>  Does not support -framework argument, to link frameworks use -Wl flag
>  (for example, to link vecLib use "-Wl,-framework -Wl,vecLib").
> 
>  No man page, use "info g77".
> <<
> Homepage: http://gcc.gnu.org/onlinedocs/g77/
> Maintainer: Jeffrey Whitaker <jswhit at fastmail.fm>
> ================================================================================ 
> 
> 
> Implementing the API specified in PEP 262 is desirable.
> 
> What I am thinking is this,
> 
> 1. when user specify a package to install, the package's .info file will 
> be looked up in 'pkginfo' directory (in PEP 262, it is the INSTALLDB 
> directory that holds all these .info files).
> 
> 2. to the system, only 3 things are crucial: where to get the package? 
> what packages the package needs? how to install? These 3 things are the 
> real critical parts of .info file, the rest are information and metadata.
> 
> 3. from the dependencies, the system now creates a tree of dependencies. 
> Can all dependencies be satisfied, i.e. are there any required packages 
> that are not in standard library and there is no .info file for?
> 
> 4. dependencies are satisfied (install the packages) from terminal leaf 
> nodes on the dependency tree to the root node (which is the one the user 
> wants to install)
> 
> 5. appropriate entries are made in appropriate files (i.e. 
> pkg-install.log) to signify which packages are installed.
> 
> 6. satisfy the files needed for API requirements of PEP 262.
> 
> Please tell me what you think...
> 
> 
> Cheers
> Maurice


From bvande at po-box.mcgill.ca  Mon Apr  4 17:02:20 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 04 Apr 2005 17:02:20 -0400
Subject: testing -- what to do for testing code with behaviour dependant
 upon which files exist?
In-Reply-To: <d2o44f$q1e$1@sea.gmane.org>
References: <424F00D5.9020205@po-box.mcgill.ca> <d2o44f$q1e$1@sea.gmane.org>
Message-ID: <4251AB5C.7010809@po-box.mcgill.ca>


> "Brian van den Broek" <bvande at po-box.mcgill.ca> wrote in message 
> news:424F00D5.9020205 at po-box.mcgill.ca...
> 
>>Hi all,
>>
>>I'm just starting to employ unit testing (I'm using doctest), and I am
>>uncertain how to handle writing tests where the behaviour being tested is 
>>dependant on whether certain file paths point to actual files.

Hi all,

I had a busy weekend after posting, so didn't get a chance to 
follow-up until now. Thanks to all who responded.

Python's my first real language, and I am a mere hobbyist, so the 
suggestions for search terms provided by Terry (and implicitly by 
Andre who suggested a mock strategy) are most welcome! Sometimes the 
hardest part of googling is knowing what terms to search for.

Grig suggested the tempfile module; I had rejected that initially, as 
the code I am testing displays an error message containing the bad 
file path, so I thought I needed to know the path name at time of 
coding the tests. But, I've since learned that doctest can be made to 
consider only leading portions of a line's content. So, this might 
well work for me. Thanks for reminding me of the approach.

Jeremy suggested using a directory name akin to 
"C:\onlyanidiotwouldhavethisdirecotrynameonadrive". That is what I had 
settled on before I posted. Somehow it feels unhappy and inelegant. 
But, I'm a bit less uncomfortable with it seeing that others have done 
so, too.

Anyway, thanks again for the suggestions :-)  Best to all,

Brian vdB



From jjl at pobox.com  Wed Apr  6 14:30:05 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Apr 2005 19:30:05 +0100
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com> <4253fe0c$1@nntp0.pdx.net>
	<8c7f10c6050406085020a24b44@mail.gmail.com>
Message-ID: <4qejlpw2.fsf@pobox.com>

Simon Brunning <simon.brunning at gmail.com> writes:

> On Apr 6, 2005 4:42 PM, Scott David Daniels <Scott.Daniels at acm.org> wrote:
> > I've always wondered about this turn of phrase.  I seldom
> > eat a cake at one sitting.
> 
> Clearly you're just not trying. ;-)

:-)))


John



From no.spam at see.below.es  Wed Apr 20 14:18:16 2005
From: no.spam at see.below.es (Javier Bezos)
Date: Wed, 20 Apr 2005 20:18:16 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <lax9e.289256$r4.17675358@news-reader.eresmas.com>


<seberino at spawar.navy.mil> escribi? en el mensaje
news:1113976729.450677.261130 at o13g2000cwo.googlegroups.com...
> Many people I know ask why Python does slicing the way it does.....
>
> Can anyone /please/ give me a good defense/justification???
>
> I'm referring to why mystring[:4] gives me
> elements 0, 1, 2 and 3 but *NOT* mystring[4] (5th element).
>
> Many people don't like idea that 5th element is not invited.
>
> (BTW, yes I'm aware of the explanation where slicing
> is shown to involve slices _between_ elements.  This
> doesn't explain why this is *best* way to do it.)

Recently there was a short (sub)thread about that.
One of my messages (against half-open slices) is,
for example

http://groups-beta.google.com/group/comp.lang.python/msg/5532dd50b57853b1

Javier

___________________________________________________________
Javier Bezos                | TeX y tipograf?a
jbezos at wanadoo dot es    | http://perso.wanadoo.es/jbezos
............................|...............................
CervanTeX (Spanish TUG)     | http://www.cervantex.org









From jason at tishler.net  Mon Apr  4 16:17:23 2005
From: jason at tishler.net (Jason Tishler)
Date: Mon, 4 Apr 2005 16:17:23 -0400
Subject: Problems compiling PIL under Cygwin
In-Reply-To: <1112622420.b10f3c33f4b325231e47d8cc95e09ded@teranews>
References: <1112622420.b10f3c33f4b325231e47d8cc95e09ded@teranews>
Message-ID: <20050404201723.GA3636@tishler.net>

Martin,

On Mon, Apr 04, 2005 at 03:46:58PM +0200, Martin Magnusson wrote:
> I'm trying to build PIL under Cygwin (for use with the Skencil vector
> graphics program), and I couldn't find a better forum for questions
> than this.
> 
> I'm using Python 2.3.4, and when I run "python setup.py build_ext -i"
> I get the following output:
> 
> running build_ext
> building '_imaging' extension
> gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes 
> -DHAVE_LIBJPEG -DHAVE_LIBZ -I/usr/include/freetype2 -IlibImaging 
> -I/usr/include -I/usr/local/include -I/usr/include/python2.3 -c 
> libImaging/GifEncode.c -o 
> build/temp.cygwin-1.5.12-i686-2.3/libImaging/GifEncode.o
> C:\cygwin\bin\python2.3.exe (1352): *** unable to remap 
> C:\cygwin\bin\tk84.dll to same address as parent(0x760000) != 0xBB0000
>       4 [main] python 1984 sync_with_child: child 1352(0x238) died 
> before initialization with status code 0x1
>     282 [main] python 1984 sync_with_child: *** child state child 
> loading dlls
> error: Resource temporarily unavailable
> 
> Does anybody know what could be done to solve this?

See the following:

    http://www.google.com/search?hl=en&lr=&q=%22cygwin+python%22+%22unable+to+remap%22+%22same+address+as+parent%22

Jason

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


From kent37 at tds.net  Wed Apr 20 08:33:48 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 20 Apr 2005 08:33:48 -0400
Subject: Python instances
In-Reply-To: <1113983093.813565.23430@l41g2000cwc.googlegroups.com>
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
	<d450ub$2kp$1@news.web.de>
	<1113983093.813565.23430@l41g2000cwc.googlegroups.com>
Message-ID: <426647ea$1_3@newspeer2.tds.net>

henrikpierrou at hotmail.com wrote:
> Guess i shouldn't think of the __init__(self) function as a constructor
> then.

No, that's not it. You shouldn't think of variables defined outside of a method as instance variables.

In Java for example you can write something like

public class MyClass {
     private List list = new ArrayList();

     public void add(Object x) {
         list.add(x);
     }
}

In this case list is a member variable of MyClass instances; 'this' is implicit in Java.

In Python, if you write something that looks similar, the meaning is different:

class MyClass:
     list = []

     def add(self, x):
         self.list.append(x)

In this case, list is an attribute of the class. The Java equivalent is a static attribute. In 
Python, instance attributes have to be explicitly specified using 'self'. So instance attributes 
have to be bound in an instance method (where 'self' is available):

class MyClass:
     def __init__(self):
         self.list = []

     def add(self, x):
         self.list.append(x)

Kent


From no at spam  Fri Apr  1 16:58:08 2005
From: no at spam (D H)
Date: Fri, 01 Apr 2005 15:58:08 -0600
Subject: decorator syntax polling suggestion
In-Reply-To: <pan.2005.04.01.21.54.39.839887@jerf.org>
References: <d11dcfba.0408121252.7690a43a@posting.google.com>
	<411BF3FC.71051A6F@alcyone.com>
	<CISdnRfssu4lrIHcRVn-ow@powergate.ca>
	<mailman.1588.1092379795.5135.python-list@python.org>
	<pan.2004.08.13.20.15.22.544894@jerf.org>
	<pan.2005.04.01.21.54.39.839887@jerf.org>
Message-ID: <fIKdnfdim71sXtDfRVn-pQ@comcast.com>

Jeremy Bowers wrote:
> On Fri, 01 Apr 2005 16:52:52 -0500, Jeremy Bowers wrote:
> Oops, sorry, some "send later" messages I thought were gone got sent.
> Sorry. Didn't mean to revive dead threads.

At least it happened on April Fool's.  Or should I say:

@aprilfools
def happened:
    at least


From rkern at ucsd.edu  Mon Apr 11 04:35:30 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 11 Apr 2005 01:35:30 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <d3d7ft$ljg$1@sea.gmane.org>
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de><mailman.1647.1113160640.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de><d3c88t$r27$1@sea.gmane.org>	<d3d0l5$8s1$1@sea.gmane.org>
	<d3d7ft$ljg$1@sea.gmane.org>
Message-ID: <d3dcn8$3i9$1@sea.gmane.org>

Fredrik Lundh wrote:
> Robert Kern wrote:
> 
> 
>>>(the Linux distributors know how to do this: look for good stuff that's
>>>either actively maintained or simple and solid enough to live for a while,
>>>make sure the licenses are good enough, bundle the latest and greatest
>>>version, ship tested versions at regular intervals, update when necessary,
>>>and pass bugs and patches upstream.  why not use the same approach
>>>for Python's standard distribution?)
>>
>>The reason they don't is because making a distribution like this is a royal pain in the ass. It 
>>makes no sense to make the Python standard distribution like this. Only insane people do this. I'm 
>>one of them.
> 
> 
> with enough volunteers, and a distributed development environment, nobody
> needs to be insane.  if you try to channel everything through a small number of
> CPython developers, everyone will loose their sanity, and the users will suffer.

Agreed, which is why I think that proper package management and a 
CPyAN-type system is the way to go, not trying to stuff everything into 
a single distribution.

>>"Updating when necessary" is problematic and really requires proper package management. Python is 
>>not an OS and cannot control all of the little factors that make package management feasible for 
>>OS distributions to do.
> 
> 
> "updating when necessary" means "adding new components to the standard library
> when there are new stable releases available, and someone has time to run the test
> suite and contact the upstream provider if necessary".

Yes, that's the "royal pain in the ass" that I was referring to. Sounds 
easy, but it soaks up far more time than you (I) possibly thought it 
would. I think that pumping out a new release of the whole standard 
library every time one package gets updated is rather absurd and 
aggravates rather than ameliorates the problem.

Allow me to take an example that I'm sure you are familiar with (and can 
correct me if I get things wrong). You were once asked why you didn't 
use Numeric arrays as the memory store for PIL image objects. Your 
(good) reason was that Numeric was not part of the standard library and 
you didn't want to add a dependency on another 3rd party package. Now 
let's suppose that Numeric was included in this standard library and PIL 
wasn't. If you wanted to use Numeric arrays, you could not simply depend 
on the standard library; you would have to depend on specific releases 
of the standard library because Numeric is changing what with numarray 
and the impending Numeric/numarray unification (actually, we ought to 
talk about that[1]). What's more, the version numbers of the standard 
library that you would have to depend on would have no particular 
correlation with the versioning of the underlying component on which you 
are really depending. And then someone is going to want to use a package 
that requires stdlib < 2.5.1-1004 *and* a package that requires stdlib > 
2.5.1-1010.

CPyAN-type systems will, if they make good on their promises, avoid this 
hassle.

[1] As a side note, with the Numeric/numarray unification, the Numeric 
people are developing an array interface that will allow seamless and 
copyless interfacing between Numeric and other packages that either 
produce something array-like (e.g. PIL) or can consume something 
array-like (e.g. gui toolkits). With this protocol, PIL can support 
Numeric arrays (or anything else array-ish like whatever image classes 
in are in a gui toolkit) without needed to depend on the modules themselves.

   http://numeric.scipy.org/

Since PIL is one of the compelling reasons for such an interface, we'd 
like your input on it. If you have comments or questions, please let us 
know on the Numpy mailing list.

   http://lists.sourceforge.net/lists/listinfo/numpy-discussion

>>What's more, once you *do* have proper package management on the platforms that you care about, it 
>>doesn't matter what is or isn't in the standard distribution.
> 
> 
> which means that at the moment, the best way to get a Python module into the
> hands of users is to 1) provide windows installers that are compatible with the
> "official" distribution, and 2) make it easy for downstream providers to package
> your stuff, and leave it to them to take care of the rest.

At the moment, yes, more or less. However, neither the standard Windows 
and Mac installers are what I consider to be "proper package management."

> but if the library in the standard distribution doesn't really matter, it should be
> stripped down to minimum, to avoid overloading the CPython maintainers.

I agree, but the CPyAN systems have to come out of the vapour first.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From danb_83 at yahoo.com  Sat Apr 30 06:31:03 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 30 Apr 2005 03:31:03 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
References: <d4u60o$akh$1@news2.netvision.net.il>
	<4272C8A0.7050404@hathawaymix.org>
	<mailman.51.1114828830.14961.python-list@python.org>
Message-ID: <1114857063.468588.229880@g14g2000cwa.googlegroups.com>

darren kirby wrote:
> quoth the Shane Hathaway:
> > pythonchallenge wrote:
> > > For the riddles' lovers among you, you are most invited to take
part
> > > in the Python Challenge, the first python programming riddle on
the net.
> > >
> > > You are invited to take part in it at:
> > > http://www.pythonchallenge.com
> >
> > That was pretty fun.  Good for a Friday.  Too bad it comes to an
abrupt
> > "temporary end".
> >
> > Shane
> >
> > P.S. I hope I didn't hammer your server on step 3.  I was missing
the
> > mark. :-)
>
> You're not the only one. This is where I am currently stuck. It's
starting to
> hurt my head.
>
> There are 478 results in the form *BBBsBBB* but the thing said
'exactly'
> right, well there are 10 results in the form *sBBBsBBBs*
> None of them seem to work...

The same thing happened to me, but then I figured it out.

Hint: Print all 10 results in a column.



From erictexier at sbcglobal.net  Mon Apr 25 23:22:33 2005
From: erictexier at sbcglobal.net (Eric Texier)
Date: Tue, 26 Apr 2005 03:22:33 GMT
Subject: key binding with mac
Message-ID: <Ztibe.1433$zu.846@newssvr13.news.prodigy.com>

I am just starting to use python on the mac.
How do I get backspace, the arrows up/down and all the control like
ctrl-a to work nicely under the console.
for now I am getting a bunch of ^? ^[[A when I use any tcsh type of 
control.
thanks,


From kasimov at i.com.ua  Tue Apr 26 11:33:41 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Tue, 26 Apr 2005 18:33:41 +0300
Subject: python equivalent of php implode
Message-ID: <d4ln6a$2nse$1@news.tsystems.kiev.ua>


   in php-scripts, to insert data to database, i'm doing like this:

   ...
   $query_param = array(
     'field0' => 1,
     'field1' => 3,
     'field2' => $var2,
     'field3' => $var3,
   );
   ...

   $sql = "INSERT INTO $table (".implode(", ", array_keys($query_param)).") VALUES ('".implode("','", $query_param)."')";

   how it can be done, using python (elegantly, without cycles)?


-- 
Best regards,
Maksim Kasimov
mailto: kasimov at i.com.ua


From http  Wed Apr 20 02:38:06 2005
From: http (Paul Rubin)
Date: 19 Apr 2005 23:38:06 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
Message-ID: <7x1x960x81.fsf@ruckus.brouhaha.com>

bokr at oz.net (Bengt Richter) writes:
> I would try right-clicking the shortcut icon and selecting
> properties, then select the shortcut tab and edit the target string
> with s/python/pythonw/ and then click ok.

Thanks!  I'll try that tomorrow.  I never would have figured that out.


From cdkrug at worldnet.att.net  Wed Apr 27 20:59:21 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Thu, 28 Apr 2005 00:59:21 GMT
Subject: Is there a better interactive plotter then pylab?
Message-ID: <JzWbe.658796$w62.18013@bgtnsc05-news.ops.worldnet.att.net>

List:

I'm trying to us pylab to see what I'm doing with some DSP algorithms,
in case my posts about convolution and ffts weren't giving it away.

I've been using pylab's plot function, but I'm finding it a bit
cumbersome.

It works, but if I switch from the interactive window to the plot window
and back, the plot window gets trashed.

Is there a better alternative for interactive use?

Thanks


Charles



From fredrik at pythonware.com  Sun Apr 10 10:03:41 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 10 Apr 2005 16:03:41 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><1113126605.315861.44730@z14g2000cwz.googlegroups.com><mailman.1632.1113130699.1799.python-list@python.org>
	<1113139772.023037.153620@l41g2000cwc.googlegroups.com>
Message-ID: <d3bbih$lr1$1@sea.gmane.org>

Kay Schluehr wrote:

> > it's also GPL:ed, and the namespace support is totally broken.  there
> > are faster solutions out there with Python-compatible licenses.
>
> Interesting. Which implementation "out there" ( so not in the std-lib )
> that maps the whole XML into an internal structure and makes it easily
> accessible is currently faster?

here are three alternatives:

    ltree (http://codespeak.net/lxml/)
    libxml2 (http://xmlsoft.org/downloads.html)
    celementtree (http://effbot.org/zone/celementtree.htm)

(ltree is an alternative binding to libxml2).

for raw parsing performance (disk to memory), see:

    http://effbot.org/zone/celementtree.htm#benchmarks

as for access, celementtree builds a tree of Python objects, while
the others have to convert the internal structures to Python objects
as you access them.  if you need to access large parts of the tree,
celementtree can be a lot faster (the yum developers report a 2-3x
speedup, for example). on the other hand, libxml2/ltree supports a
lot more XML standards (XPath, XSLT, various validation models,
etc) which can come in handy in many cases.

</F>





From vze4rx4y at verizon.net  Fri Apr  1 11:34:32 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 01 Apr 2005 16:34:32 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com>
Message-ID: <sKe3e.1424$7b.577@trndny01>

[Peter Otten]
> a StopIteration raised in a generator expression
> silently terminates that generator:
>
> >>> def stop(): raise StopIteration
> ...
> >>> list(i for i in range(10) if i < 5 or stop())
> [0, 1, 2, 3, 4]
>
> In a list comprehension, on the other hand, it is propagated:
>
> >>> [i for i in range(10) if i < 5 or stop()]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 1, in stop
> StopIteration
>
> Is that an intentional difference?

I would call it an unfortunate assymmetry -- one the never comes up unless
you're up to no good ;-)

In a way, both behave identically.  They both raise StopIteration.  In the case
of the generator expression, that StopIteration is intercepted by the enclosing
list() call.  That becomes obvious if you write a pure python equivalent for
list:

    def lyst(s):
        it = iter(s)
        result = []
        try:
            while 1:
                result.append(it.next())
        except StopIteration:        # guess who trapped StopIter
            return result


Raymond Hettinger





From mefjr75 at hotmail.com  Fri Apr 15 17:48:11 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 15 Apr 2005 14:48:11 -0700
Subject: Pyrex colorizer please review
Message-ID: <1113601691.573420.93420@o13g2000cwo.googlegroups.com>

Hello all,
I have been working on a Pyrex colorizer,
and need a little feedback.
PyrexTypes are orange and PyrexKeywords are violet
( this will be fully extensible when finished ).
Please review the webpage and let me know what you think.
I do not fully grok Pyrex( never used it ).
If you find tokens missing that should be added,
or extra tokens that should be removed please comment.
If all is well I will post the updated
PySourceColor module and PyrexColor script to my website for download.

http://bellsouthpwp.net/m/e/mefjr75/python/PyrexTest_XHTML2.htm

M.E.Farmer



From mwm at mired.org  Tue Apr 26 00:00:57 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 23:00:57 -0500
Subject: What's do list comprehensions do that generator expressions
	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
	<pan.2005.04.25.23.56.25.840188@jerf.org>
Message-ID: <86acnmnq4m.fsf@guru.mired.org>

Jeremy Bowers <jerf at jerf.org> writes:

> On Mon, 25 Apr 2005 16:48:46 -0400, Bill Mill wrote:
> generalizing anyways, which is the right approach. I doubt that Python 3.0
> would have two radically different implementations; they'll just have the
> genexp implementation, and an optimization for list creation if the list
> creation can know the size in advance, regardless of where it came from.

Why do we have to wait for Python 3.0 for this? Couldn't list
comprehensions and generator expression be unified without breaking
existing code that didn't deserve to be broken?

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From ojokimu at yahoo.co.uk  Tue Apr  5 19:33:52 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Wed, 6 Apr 2005 00:33:52 +0100 (BST)
Subject: Installing Python 2.4 on Linux
In-Reply-To: 6667
Message-ID: <20050405233352.5238.qmail@web26809.mail.ukl.yahoo.com>


--- Edward Diener <eldiener_no_spam_here at earthlink.net> wrote:
[snip]
> I do not know whether this is a Python problem or a Fedora 3 problem
> but 
> I thought I would ask here first and see if anybody else had the same
> 
> problem. I imagine the problem might exist on other Linux systems.

On my Mandrake 10.1 system I have the default python 2.3 installation
plus a separate python 2.4 installation which I compiled from source.
There are two executables (python2.3 and python2.4) in /usr/bin, plus a
hard-link (from python2.4) named python. If necessary, I could switch
back to the default setup by replacing the hard-link with one from
python2.3 - so the system would then have its preferred python version
and I could selectively run python2.4 whenever appropriate. So far,
Mandrake has not complained about using python 2.4 exclusively, so I
might try removing the old installation eventually. (Then again, it's
always handy to keep it for compatibility testing).

Note that if compiling and installing from source there is an option of
'make altinstall' which will leave the existing python executables (and
man pages) as they are and just create a new python2.4 executable - by
default the library is installed in '/usr/local/lib/python2.4'. See the
README for details.


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From flamesrock at gmail.com  Thu Apr 28 22:09:00 2005
From: flamesrock at gmail.com (flamesrock)
Date: 28 Apr 2005 19:09:00 -0700
Subject: Python Client & Loggin into Secure User Database
Message-ID: <1114740540.255733.315170@f14g2000cwb.googlegroups.com>

First, my problem doesn't make much practical sense so I hope you're up
for a challenge.

What I have (in concept) is a standalone web client that connects
different 'players' to a central host and distributes game files
between them. A user claims certain files, plays them, and then
automatically uploads them to the site where they are subsequently
distributed.

What I want to do is have a secure system that lets users log in upon
connecting so that the client has ftp privileges to upload. I'd like to
avoid xmlrpc and anything that would require the server to do more than
a simple php + sql script,  preferably less. Basically, as simple as
possible without scripting the server in python too.

Whats the best way to accomplish this for a python client?
(registration will be browser based btw..)

-thanks in advance



From grante at visi.com  Tue Apr  5 17:27:41 2005
From: grante at visi.com (Grant Edwards)
Date: Tue, 05 Apr 2005 21:27:41 -0000
Subject: optparse and negative numbers as positional arguments
References: <115605ankljag93@corp.supernews.com>
Message-ID: <11560md3p6drtc8@corp.supernews.com>

On 2005-04-05, Tomi Silander <tsilande at hiit.fi> wrote:

> this must have been asked 1000 times (or nobody is as stupid as me),
> but since I could not find the answer, here is the question.

[...]

> $ python2.4 ./mitvit.py -1.1

[optparse error]

> How is one supposed to give negative numbers as positional arguments 
> when using optparse?

  ./mitvit.py -- -1.1

-- 
Grant Edwards                   grante             Yow!  .. over in west
                                  at               Philadelphia a puppy is
                               visi.com            vomiting...


From peter at engcorp.com  Fri Apr 29 21:29:02 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 29 Apr 2005 21:29:02 -0400
Subject: Killing process
In-Reply-To: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>
References: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>
Message-ID: <k8KdnRntjOUZQu_fRVn-qQ@powergate.ca>

Harlin Seritt wrote:
> I am using os.getpid() to get the pid value for a script running. I
> store that value (as a string) to a file. Later when I try to kill that
> pid (i pull this from the file as a string value) I get  errors.
[...]
>   File "vngconsole.py", line 27, in StopVngSvc
>     win32api.TerminateProcess(int(pid), 0)
> error: (6, 'TerminateProcess', 'The handle is invalid.')

I believe the problem is you are assuming TerminateProcess() takes a 
PID, when in fact it takes a "handle".  See this recipe for some hints: 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/347462
and 
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createprocess.asp
to learn more about the key function you're missing.

-Peter


From jbo at cannedham.ee.ed.ac.uk  Thu Apr 14 06:16:18 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Thu, 14 Apr 2005 11:16:18 +0100
Subject: preallocate list
In-Reply-To: <squq51l33q22o6qikeuqu66eunlqa4o5hp@4ax.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j6p7$ntl$1@scotsman.ed.ac.uk>
	<squq51l33q22o6qikeuqu66eunlqa4o5hp@4ax.com>
Message-ID: <d3lfs4$9v$1@scotsman.ed.ac.uk>

John Machin wrote:
> On Wed, 13 Apr 2005 14:28:51 +0100, Jim <jbo at cannedham.ee.ed.ac.uk>
> wrote:
> 
> 
>>Thanks for the suggestions. I guess I must ensure that this is my bottle 
>>neck.
>><code>
>>    def readFactorsIntoList(self,filename,numberLoads):
> 
> 
> 1. "numberLoads" is not used. 
> 
> 
>>	factors = []
>>        f = open(self.basedir + filename,'r')
>>        line = f.readline()
>>        tokens = line.split()
>>        columns = len(tokens)
>>        if int(columns) == number:
> 
> 
> 2. "columns" is already an int (unless of course you've redefined
> "len"!). Doing int(columns) is pointless.
> 3. What is "number"? Same as "numberLoads"?
> 4. Please explain in general what is the layout of your file and in
> particular, what is the significance of the first line of the file and
> of the above "if" test. 
> 
> 
>>            for line in f:
>>                factor = []
>>                tokens = line.split()
>>                for i in tokens:
>>                    factor.append(float(i))
> 
> 
> 4. "factor" is built and then not used any more??
> 
> 
>>                factors.append(loadFactor)
> 
> 
> 5. What is "loadFactor"? Same as "factor"?
> 
> 
>>        else:
>>            for line  in f:
>>                tokens = line.split()
>>                factors.append([float(tokens[0])] * number)
> 
> 
> 6. You throw away any tokens in the line after the first??
> 
> 
>>	return factors
>></code>
>>
>>OK. I've just tried with 4 lines and the code works.
> 
> 
> Which code works? The code you posted? Please define "works".
> 
> 
> 
>>With 11000 lines it 
>>uses all CPU for at least 30 secs. There must be a better way.
> 
> 
> Perhaps after you post the code that you've actually run, and
> explained what your file layout is, and what you are trying to
> achieve, then we can give you some meaningful help.
> 
> Cheers,
> 
> John
> 
> 
> 

Thanks for looking John. For that I should take a little time to explain.

I tried to rename the variables, some of them were four words long. I 
got a couple of the renames wrong. Sorry.

Regarding 'works'. I meant that with a text file of four lines the code 
completed. With my desired size 11000 lines it didn't complete within 
the limits of my patience. I didn't try any other size.

Also I perhaps wrongly use the newsgroup threads paradigm in trying to 
restart my query with extra information (that turned out a little faulty).

Luckily the other branches yielded fruit.

Thanks again
Jim



From peter at engcorp.com  Mon Apr 11 11:15:26 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 11 Apr 2005 11:15:26 -0400
Subject: My stupid newbie mistake
In-Reply-To: <Ka2dnRhGzbydEsffRVn-oQ@comcast.com>
References: <k00l51dagrs1b1cq8pam1ac8vht2v6t3rp@4ax.com>
	<Ka2dnRhGzbydEsffRVn-oQ@comcast.com>
Message-ID: <m5GdneHTZ4EbCcffRVn-3g@powergate.ca>

Larry Bates wrote:
> Matt Feinstein wrote:
>>>>>import try
>>
>>gave a syntax error... So, how about a
>>'YouAreUsingAReservedWordStupid' exception ?
>
> Because Python allows you to replace built-in methods with
> your own.  Later you will find that this can be extremely
> powerful.  

Powerful, but not involved in this case, since you
can't redefine *keywords* such as 'try'.

-Peter


From codecraig at gmail.com  Thu Apr 14 15:33:16 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 12:33:16 -0700
Subject: distribute python script
In-Reply-To: <fyxtw4mq.fsf@python.net>
References: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>
	<vPmdnUKBSeVrIcPfRVn-1Q@comcast.com>
	<1113505210.693247.143930@z14g2000cwz.googlegroups.com>
	<fyxtw4mq.fsf@python.net>
Message-ID: <1113507196.290786.264710@z14g2000cwz.googlegroups.com>

Thanks so much Thomas!!!  I added encodings to my setup's...here it is

setup(console=[{"script": 'monkey_shell.py'}], options={"py2exe":
{"packages": ["encodings"]}})

and i did the same for the other python script.

Thanks!!



From steven.bethard at gmail.com  Wed Apr  6 11:07:02 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 06 Apr 2005 09:07:02 -0600
Subject: formatting file
In-Reply-To: <mailman.1428.1112793749.1799.python-list@python.org>
References: <mailman.1428.1112793749.1799.python-list@python.org>
Message-ID: <drCdneKB9dGOZs7fRVn-ow@comcast.com>

SPJ wrote:
> Hi,
> 
> I am new to python hence posing this question.
> I have a file with the following format:
> 
> test1    1.1-1   installed
> test1    1.1-1   update
> test2    2.1-1   installed
> test2    2.1-2   update
> 
> I want the file to be formatted in the following way:
> 
> test1    1.1-1   1.1-2
> test2    2.1-1   2.1-2
> 
> How can I achieve this? I am stuck here.

py> import itertools as it
py> for line1, line2 in it.izip(f, f):
...     line1, line2 = [line.split() for line in [line1, line2]]
...     print '\t'.join(line1[:2] + line2[1:2])
...
test1	1.1-1	1.1-2
test2	2.1-1	2.1-2

where f is the file containing your data.  I assumed it looked like:

py> import StringIO as strio
py> f = strio.StringIO("""\
... test1    1.1-1   installed
... test1    1.1-2   update
... test2    2.1-1   installed
... test2    2.1-2   update
... """)

STeVe


From fred.dixon at gmail.com  Tue Apr 19 11:31:10 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 19 Apr 2005 08:31:10 -0700
Subject: py2exe - create one EXE
In-Reply-To: <mailman.1991.1113611832.1799.python-list@python.org>
References: <mailman.1991.1113611832.1799.python-list@python.org>
Message-ID: <1113924670.511745.181050@f14g2000cwb.googlegroups.com>

what about trying cx_freeze



From ajikoe at gmail.com  Thu Apr  7 03:36:04 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 7 Apr 2005 00:36:04 -0700
Subject: client-client connection using socket
Message-ID: <1112859364.203394.34100@g14g2000cwa.googlegroups.com>

Hello,

I have two client computers, each has its own host name.
Can I do connection like socket between the two?
I check when we want to make connection we have to only put hostname
and port.
For example:

  #Server program. Could we use client hostname here ?
  HOST = ""
  PORT = 21567
  BUFSIZ = 1024
  ADDR = (HOST,PORT)
  tcpSerSock = socket(AF_INET,SOCK_STREAM)
  tcpSerSock.bind(ADDR)
  tcpSerSock.listen(5)

  while 1:
    print "waiting for connection..."
    tcpCliSock,addr = tcpSerSock.accept()
    print "connected from:",addr
    while 1:
      data = tcpCliSock.recv(BUFSIZE)
      if not data:break
      tcpCliSock.send("[%s] %s" % ctime(time()),data)
    tcpCliSock.close()
  tcpSerSock.close()

  #Client program
  HOST = "fstbpc19"
  PORT = 21567
  BUFSIZ = 1024
  ADDR = (HOST,PORT)
  tcpCliSock = socket(AF_INET,SOCK_STREAM)
  tcpCliSock.connect(ADDR)
  while 1:
    data = raw_input("> ")
    if not data:break
    tcpCliSock.send(data)
    data = tcpCliSock.recv(1024)
    if not data:break
    print data

  tcpCliSock.close()

Sincerely Yours,
Pujo Aji



From tim.peters at gmail.com  Tue Apr 19 23:56:51 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 19 Apr 2005 23:56:51 -0400
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <7xekd66ra3.fsf@ruckus.brouhaha.com>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
Message-ID: <1f7befae050419205614660348@mail.gmail.com>

[Paul Rubin]
> Dumb question from a Windows ignoramus:
>
> I find myself needing to write a Python app (call it myapp.py) that
> uses tkinter, which as it happens has to be used under (ugh) Windows.
> That's Windows XP if it makes any difference.

Nope, the Windows flavor doesn't matter.

> I put a shortcut to myapp.py on the desktop and it shows up as a
> little green snake icon, which is really cool and Pythonic.  When I
> double click the icon, the app launches just fine and the tkinter
> interface does its thing.  But Windows also launches a DOS box that
> just sits on the screen uselessly.

...


> Question: is there any simple way to arrange to launch the app from
> the desktop, without also launching a DOS box? ...

>From a DOS box,

    ren myapp.py *.pyw

and click on a link to the resulting myapp.pyw instead.  It's the
purpose of the .pyw extension on Windows not to "bring up a DOS box".
.pyw is associated with the Windows-specific pythonw.exe.


From tom at lemurconsulting.com  Tue Apr 26 06:16:57 2005
From: tom at lemurconsulting.com (Tom Mortimer)
Date: Tue, 26 Apr 2005 11:16:57 +0100
Subject: pstats: negative time values
Message-ID: <426e1514$0$347$cc9e4d1f@news.dial.pipex.com>

Hi,

A quick question - can anyone tell me how to interpret
negative time values in pstats.Stats.print_stats() output?
Eg -

     39052965 function calls (38035317 primitive calls) in -250.959 CPU 
seconds

     Ordered by: internal time
     List reduced from 202 to 20 due to restriction <20>

     ncalls  tottime  percall  cumtime  percall 
filename:lineno(function)
     5829    26.423   0.005    -155.269  -0.027 :0(parse)
     ...


This is with Python 2.4 on Linux.  Is it a bug, or what
does it mean?

Thanks!

Tom


From Ugo_DiGirolamo at invision.iip.com  Tue Apr 26 18:02:24 2005
From: Ugo_DiGirolamo at invision.iip.com (Ugo Di Girolamo)
Date: Tue, 26 Apr 2005 15:02:24 -0700
Subject: Problem with embedded python
Message-ID: <3D4A0A4A0225484B965A23CFD127B82F4A6802@invnmail.invision.iip.com>

I have the following code, that seems to make sense to me. 


However, it crashes about 1/3 of the times. 


My platform is Python 2.4.1 on WXP (I tried the release version from 
the msi and the debug version built by me, both downloaded today to 
have the latest version). 


The crash happens while the main thread is in Py_Finalize. 
I traced the crash to _Py_ForgetReference(op) in object.c at line 1847, 
where I have op->_ob_prev == NULL.


What am I doing wrong? I'm definitely not too sure about the way I'm 
handling the GIL. 


Thanks in adv for any suggestion/ comment


Cheers and ciao 


Ugo 


////////////////////////// TestPyThreads.py ////////////////////////// 
#include <windows.h> 
#include "Python.h" 


int main() 
{ 
        PyEval_InitThreads(); 
        Py_Initialize(); 
        PyGILState_STATE main_restore_state = PyGILState_UNLOCKED; 
        PyGILState_Release(main_restore_state); 


        // start the thread 
        { 
                PyGILState_STATE state = PyGILState_Ensure(); 
                int trash = PyRun_SimpleString( 
                                "import thread\n" 
                                "import time\n" 
                                "def foo():\n" 
                                "  f = open('pippo.out', 'w', 0)\n" 
                                "  i = 0;\n" 
                                "  while 1:\n" 
                                "    f.write('%d\\n'%i)\n" 
                                "    time.sleep(0.01)\n" 
                                "    i += 1\n" 
                                "t = thread.start_new_thread(foo, ())\n" 
                                ); 
                PyGILState_Release(state); 
        } 


        // wait 300 ms 
        Sleep(300); 


        PyGILState_Ensure(); 
        Py_Finalize(); 
        return 0; 

} 


From martin at v.loewis.de  Thu Apr 14 02:23:02 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 14 Apr 2005 08:23:02 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <1o31j2-7l6.ln1@home.rogerbinns.com>
References: <425a9869$0$38039$bed64819@news.gradwell.net><is2tmhzk.fsf@python.net><425aa0fb$0$38041$bed64819@news.gradwell.net><425AF2AB.1030401@v.loewis.de><425b8948$0$38045$bed64819@news.gradwell.net>
	<mailman.1769.1113320562.1799.python-list@python.org>
	<1o31j2-7l6.ln1@home.rogerbinns.com>
Message-ID: <425e0c46$0$8215$9b622d9e@news.freenet.de>

Roger Binns wrote:
>    - I could make some sort of installer that did all the non-Python interpretter
>      pieces and it would have to be compatible with anyone else doing the same
>      thing.
> 
> The first is a waste of my time and effort, and I do the second except I also
> include the Python interpretter meaning there are no dependencies.

If that works for you and your users, fine - the main point of this
thread is that some users complain they can't do that anymore, because
they have no license to distribute msvcr71. For those users: what is
the reason not to use the approach of shipping an application that
requires a certain version of Python pre-installed on the target
machine?

Regards,
Martin


From john at castleamber.com  Mon Apr 25 19:26:56 2005
From: john at castleamber.com (John Bokma)
Date: 25 Apr 2005 23:26:56 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
Message-ID: <Xns9643BBA1F1263castleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <john at castleamber.com> writes:

[ unless ]

> Yeah - unless is a bad idea.

LOL, because you don't like it? You already showed code like:

if condition then
   nothing
else
   something

unless IMNSHO improves readability.

>> I doubt that features have been added to Perl just because. Even ones
>> that look like it, unless for example, have an excellent use, it
>> makes the code more readable.
> 
> Then why do most Perl programmers consider unless "! a good idea"?

Reread the last part of the last sentence you quoted above.

>> *sigh* you gave a list of problems, I replied by putting all answers
>> on one line, with () around them, and commas between them. I was not 
>> constructing a tuple, or a list in Perl 
> 
> Right. You were constructing something for humans to read - and
> managed to construct something that was a PITA to read. If you'd made
> the oher choice, it wouldn't have been a PITA to read.

*sigh*, you asked several *stand alone* problems, from the context of 
your question especially *you* should have been able to grasp that I 
wasn't creating some silly list. The etc was a giveaway.

>>> Actually, it's not clear the grep was right either. The return value
>>> of grep (and map) isn't always the right thing.
>> If you want to have a list of results and you assign it to a scalar,
>> you are doing the wrong thing.
> 
> And what if you do something with it other than assign it to a
> variable?

Depends on what you are going to do with it. If you give it to something 
that turns the context into scalar, you get the number of items, but 
either that is what you want, or you make a mistake.

>> But the bottom line is: I gave you answers to all, except one, of
>> your problems, you think my set of answers is a kind of Perl list,
>> you thought the grep was plainly wrong, and I guess you are not
>> comfortable with split.
> 
> I thought your answer was a kind of list, but the syntax you chose
> made it completely unclear where each item ended, because you
> overloaded the "," character to seperate arguments to functions in the
> list as well as to separate items in the list.

You claimed to have some experience with perl, so I was *hoping* that 
you at least were able to understand sort, split, and grep are perl 
keywords. I mean, as a joke, I even almost translated your examples 
literaly e.g.

sort a list                           sort @alist

split a string on white space         split ' ', $astring

pull select list elements based       grep criteria, @list
on some criteria of some kind

> Choosing the other
> option would have grouped the arguments, and made things clear.

I doubt it, you are just looking everywhere for a point, there is none. 
Your Perl skills are doubtfull to say the least. And yet you think you 
can say how badly it is designed, and so many things are wrong with it.

To me you appear like a parrot, just repeating what you read somewhere, 
or heard somewhere.

>> And this gives me the feeling that you either haven't been using Perl
>> for over 4 years, or was never got beyond the absolute beginner
>> level. In the latter case I can imagine that you are overwhelmed by
>> Perl. As would one by any language.
> 
> I'll admit it's been a while since I did anything other than
> debugging. I haven't had much call to do the things that Perl is
> really good at (simple re-heavy scripts), so I haven't done much
> development in it.

Amazing, how can you debug if you know next to nothing of it?

> You may be overwhelmed by any language. I'm not.

Sure, LOL. You are so overwhelmed with Perl that you even lack the basic 
skills, but yet nag about it a lot.

>> In a pure language such things are in the library.
> 
> So, where's the ARM assemblly library that includes dictionaries?

I don't have access to a small one I wrote ages ago. But I am sure there 
are enough people who can provide you with one, or otherwise, as a 
skilled programmer, you would be able to write one in a day or less.

> already pointed out the LISP study on garbage collection. Bounds
> checking doesn't prevent mistakes, it just makes them easier to find
> by causing an error report at the point the bug occured, instead of at
> some point in the future.

So it prevents a mistake from poping up in production code. That's 
enough for me.

>> If I considered garbage collection bad, I would say so. But like
>> airbags doesn't improve the driving skills of someone, so doesn't all
>> kind of restrictions turn bad programmers suddenly in good
>> programmers. 
> 
> You keep harping on restrictions. Garbage collection isn't a
> restriction. It's a feature.

It's also a restriction. Why do you think in Java one can call the gc 
explicitly?

>> Moreover, good programmers rarely need to be restricted. But I don't
>> see garbage collection as an anti-memory-leak restriction (which it
>> can't be in all cases) but as a time saver.
> 
> I think garbage collection is a time saver as well. It saves me time
> hunting bugs caused by incorrect usage of the facilities it
> replaced. It may save a little time in not having to write explicit
> deallocation instructions, but that's trivial.

In my case it saves time the other way around, I consider correct usage 
trivial, but the typing all the time...

>> But is that because there are separate communities, or because there
>> are different skill levels? Moreover, I hope that "have to maintain"
>> was "had to maintain (some time ago)", because your Perl skills are
>> more than lacking.
> 
> No, unfortunately I still have to maintain Perl code.

Then I seriously would recommend you to take a few days to read, and re-
read Learning Perl. Not as a joke, but to save yourself a lot of time. 
Make notes the second pass.

> Ok, so it's only the skill level of the programmers that's the cause
> of the changes. So why does the language offer bad choices to the
> programmers?

Who are "the programmers" to you? And what is a bad choice?

> That's as silly as a language having garbage collection
> and alloc/free. Good programmers won't use the latter.

Good programmers in your opinion. A really good programmer would use 
alloc/free, if garbage collection works as it does with Java, in those 
cases it's better.

>> Which Perl? ActiveState Perl does indeed come with HTML, and XML 
>> parsers, SMTP, etc, clients. Web server(s), I have no idea, haven't 
>> needed a Perl webserver, I doubt it comes with AS Perl.
> 
> Sure, anyone can bundle whatever they want up as a distribution, but
> that doesn't mean those things are part of the base library. The
> original contention which caused your reaction was that Python came
> with a larger base library than Perl does. It seems that this claim is
> still true even if you use the ActiveState distribution of Perl.

I have no idea. Which modules do you miss in Perl that come with Python?

>>> That's odd - all the
>>> packages I see seem to want to install those things from CPAN.
>> Is there such a centralized place for libraries for Python?
> 
> Unfortunately, no. PyPI is the one linked to from the web site. It
> doesn't have CPAN's auto-install capabilities

So instead of the ability to install a Perl module with just a few lines 
of typing, one has to eh... what? Use google? Ask around?

>> So it seems I am right: the overwhelming effect of "many ways" is
>> mainly seen by absolute beginners, who are able to make up many ways,
>> even if there is just one or two :-D.
> 
> Are you afraid to answer the question? Do you or do you not use the
> "foreach" loop in perl? Until you do, I can't know why my asking that
> question makes you call my perl experience into question.

I haven't been using *foreach* for quite some time, I use *for* all the 
time. Which is just because I am lazy.

>> Perl 4? Even Perl 5 is almost 11 years old. Which version of Perl 5
>> are you talking about?
> 
> Yup - I was using Perl back when it was at version 3. The currently
> installed Perl is 5.8.5.

You used Perl 3!?? LOL! For what? To write poetry? I mean, if you used 
version 3, and you still make extremely basic mistakes...

>>>>> Right - Perl makes writing ugly,
>>>> Nope, the programmer does that.
>>> No, the programme writes the ugly code. Perl makes it easy.
>> So, and who is to blame? Would you trust a programmer who can only
>> write code in a certain way because he is restricted by the langauge
>> to do so? 
> 
> Which would you trust more - a programmer who had to unlearn all his
> bad habits, or one who never had the chance to develop them?

Neither, and think about that for some time.

>> No. If this was crossposted in a Perl group, by now quite a lot of 
>> people would have pointed you out, probably in a less nice way, that 
>> your Perl skills are of a person who hasn't even gone beyond the
>> first few chapters of "Learning Perl". 
> 
> Oh, bullshit. I admit my perl skills are rusty - that comes from
> having found a language that is superior to it across a large
> collection of problem domains. I never read "Learning Perl". It didnt'
> exist when I learned Perl.

So you got stuck with Perl 3 somehow?

> Even if it is true, the point still stands - Perl programs are less
> maintainable than Python programs. I maintain that the difference in
> philosphy on the number of ways to do things is a cause for that.

But to me, you don't sound qualified to make that statement, your Perl 
skills are, well, rusty.

>> And a bad programmer will go at great length explaining how bad the 
>> tools are, because he has to learn them :-D
> 
> A good programmer will compare the toolset to others he's familiar
> with,

which only can be done when he/she knows both (almost) equally well.

> and choose the toolset that is best for the jobs he does. An
> evangelical programmer will then spend a lot of effort explaining why
> one toolset is better than another.

without a good understanding of the other toolset, yup.

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


From smacpher at gmail.com  Fri Apr 22 03:13:05 2005
From: smacpher at gmail.com (Shaun)
Date: 22 Apr 2005 00:13:05 -0700
Subject: Noobie Question: Using strings and paths in mkdir
	(os.mkdir("/test/"a))
Message-ID: <a462a352.0504212313.3bb6d361@posting.google.com>

Hello!

I can't seem to get paths and variables working together:

import os
a = 'books'
os.chdir( '/test')
os.mkdir("/test/"a)

the last line does not seem to work.  os.mkdir(a) makes the directory
books, but i want this directory as a subdirectory of test.

I also tried: os.mkdir("/test/",a), and trying to make b = 'test' and
then os.mkdir(a b).

Does someone have any ideas or a link they can give me, I looked under
strings in the python tutorial and library manual but I guess not in
the right spot.

Thanks for your help!

Shaun


From steven.bethard at gmail.com  Fri Apr 22 18:34:00 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 22 Apr 2005 16:34:00 -0600
Subject: grouping subsequences with BIO tags
In-Reply-To: <42686970.196123600@news.oz.net>
References: <wPidnSMBAONhgfXfRVn-sw@comcast.com>
	<42686970.196123600@news.oz.net>
Message-ID: <x8CdnR_SuMhL5vTfRVn-pA@comcast.com>

Bengt Richter wrote:
> On Thu, 21 Apr 2005 15:37:03 -0600, Steven Bethard <steven.bethard at gmail.com> wrote:
> 
>>I have a list of strings that looks something like:
>>    ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
>>I need to group the strings into runs (lists) using the following rules 
>>based on the string prefix:
>>    'O' is discarded
>>    'B_...' starts a new run
>>    'I_...' continues a run started by a 'B_...'
>>So, the example above should look like:
>>    [['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]
>>
>>At the same time that I'm extracting the runs, it's important that I 
>>check for errors as well.  'I_...' must always follow 'B_...', so errors 
>>look like:
>>    ['O', 'I_...']
>>    ['B_xxx', 'I_yyy']
>>where 'I_...' either follows an 'O' or a 'B_...' where the suffix of the 
>>'B_...' is different from the suffix of the 'I_...'.
> 
> With error checks on predecessor relationship,
> I think I'd do the whole thing in a generator,
> doing my own groupby as I went.
> E.g., see if this does what you want
> (slightly different error checking):
> 
>  >>> L = ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
>  >>> def get_runs(seq):
>  ...     subseq =[]
>  ...     curr = '<NO PRIOR ELEMENTS>'
>  ...     for latest in seq:
>  ...         curr, last = latest, curr
>  ...         if curr.startswith('B_'):
>  ...             if subseq: yield subseq
>  ...             subseq = [curr]
>  ...         elif curr.startswith('I_'):
>  ...             if (last[:2] not in ('B_', 'I_') or
>  ...                 last[2:] != curr[2:]
>  ...             ): raise ValueError, '%r followed by %r'%(last, curr)
>  ...             subseq.append(curr)
>  ...         elif curr!='O':
>  ...             raise ValueError, 'Unrecognized element: %r' % curr
>  ...     if subseq: yield subseq
>  ...
>  >>> list(get_runs(L))
>  [['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]

Yeah, I started this route, and got confused by it.  Of course it makes 
perfect sense when someone writes you a working version. ;)  Thanks!
> 
> But note that I allowed multiple I_X, did you want to do that?
>  >>> list(get_runs('B_X I_X I_X'.split()))
>  [['B_X', 'I_X', 'I_X']]

Yeah, that's right.  Multiple 'I_...'s should be grouped together.

> Did you want all these "errors" caught?
>  >>> list(get_runs('B_X I_X ?_X'.split()))
>  Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "<stdin>", line 15, in get_runs
>  ValueError: Unrecognized element: '?_X'
>  >>> list(get_runs('I_X I_X ?_X'.split()))
>  Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "<stdin>", line 12, in get_runs
>  ValueError: '<NO PRIOR ELEMENTS>' followed by 'I_X'
>  >>> list(get_runs('B_X I_Y ?_X'.split()))
>  Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "<stdin>", line 12, in get_runs
>  ValueError: 'B_X' followed by 'I_Y'
> 
> Does that do what you want? (BTW, I added an error check against ['B_X', '*_X'] and such)

Yeah, those are the right errors.  I'll have to think about whether I 
should be trying to catch the [^BI]_ error.  It doesn't appear in my 
data now, but that doesn't mean it might not in the future.  Thanks!

STeVe


From prabapython at yahoo.co.in  Wed Apr 20 05:23:58 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Wed, 20 Apr 2005 10:23:58 +0100 (BST)
Subject: goto statement
In-Reply-To: 6667
Message-ID: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>

Dear All,

   In Python what is equivalent to goto statement

regards,
praba 

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From kay.schluehr at gmx.net  Tue Apr 26 02:54:07 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 25 Apr 2005 23:54:07 -0700
Subject: Injecting code into a function
In-Reply-To: <1114495437.518381.140890@g14g2000cwa.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
	<1114457804.600476.324860@o13g2000cwo.googlegroups.com>
	<1114470993.307543.133770@z14g2000cwz.googlegroups.com>
	<1114493251.818250.6580@g14g2000cwa.googlegroups.com>
	<1114495437.518381.140890@g14g2000cwa.googlegroups.com>
Message-ID: <1114498447.291550.129980@z14g2000cwz.googlegroups.com>


George Sakkis wrote:
> > Oh, I overlooked this. Then the solution becomes simple:
> >
> >    sys._getframe().f_trace
> >
> > Test:
> >
> > >>> an = Analyzer()
> > >>> sys.settrace(an.trace_returns)
> > >>> sys._getframe().f_trace
> > <bound method Analyzer.trace_returns of <__main__.Analyzer instance
> at
> > 0x010015D0>>
>
> Does this work for you non-interactively ? I tried running it from a
> script or importing it from a module but it returns None. Very
> strange...
>
> George

You are right. The expression was context-dependent :-/

I had not yet the time to analyze the output of the following function
but it returns stable values:

def gettracefunc():
    import sys
    i = 0
    while 1:
        try:
            f_trace = sys._getframe(i).f_trace
            if f_trace:
                return f_trace
            i+=1
        except ValueError:
            break

Ciao,
Kay



From martin at v.loewis.de  Sat Apr  2 02:48:21 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 02 Apr 2005 09:48:21 +0200
Subject: Attributes and built-in types
In-Reply-To: <opstad-E606C0.12421701042005@reader0901.news.uu.net>
References: <opstad-E606C0.12421701042005@reader0901.news.uu.net>
Message-ID: <424E4E45.8090607@v.loewis.de>

Dave Opstad wrote:
> Is it just an implementation limitation that attributes cannot be 
> assigned to instances of internal types?

No, not "just". Some types have a fixed set of attributes by design,
whereas others allow addition of attributes. There are several reasons
for this design. Performance is one of them; backwards compatibility
another.

Regards,
Martin


From merkosh at hadiko.de  Tue Apr 12 12:40:17 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 18:40:17 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
	<d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>
Message-ID: <d3gtlh$2ll$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 17:00 pm Michele Simionato wrote:

> I did not put memoize on __new__. I put it on the metaclass __call__.
> Here is my memoize:
> 
>  def memoize(func):
>      memoize_dic = {}
>      def wrapped_func(*args):
>          if args in memoize_dic:
>              return memoize_dic[args]
>          else:
>              result = func(*args)
>              memoize_dic[args] = result
>              return result
>      wrapped_func.__name__ = func.__name__
>      wrapped_func.__doc__ = func.__doc__
>      wrapped_func.__dict__ = func.__dict__
>      return wrapped_func
> 
>  class Memoize(type): # Singleton is a special case of Memoize
>      @memoize
>      def __call__(cls, *args):
>          return super(Memoize, cls).__call__(*args)

I tried it out and found the following "inconsistency":

>>> class Foobar(object):
...     __metaclass__ = Memoize
...     def __init__(self, *args): pass
...
>>> Foobar(1)
<__main__.Foobar object at 0x4006f7ec>
>>> Foobar(2)
<__main__.Foobar object at 0x4006f7cc>
>>> Foobar(3)
<__main__.Foobar object at 0x4006f82c>

Unless I'm using it incorrectly (I haven't done much metaclass programming
yet) this is the same problem was with using @memoize on __new__ and
__init__.

Talking so much about singletons I'm not even sure what the definition on
calling a singleton with different constructor parameter values is.

Anyways, a fix for that could be:

class SingletonFactory(type):
    single = {}
    def __call__(cls, *args):
        if (cls not in SingletonFactory.single):
            SingletonFactory.single[cls] = super(SingletonFactory,
cls).__call__(*args)
        return SingletonFactory.single[cls]


i.e. not caching the parameter values or types.

Uwe


From radam2 at tampabay.rr.com  Sat Apr  2 15:34:21 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 20:34:21 GMT
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
	<prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>
	<d2mqcl$r6t$02$1@news.t-online.com>
Message-ID: <g3tt411e3ag0sak0ehckmsl3dou92sjuei@4ax.com>

On Sat, 02 Apr 2005 21:04:57 +0200, "Diez B. Roggisch"
<deetsNOSPAM at web.de> wrote:

>> I followed that part.  The part that I'm having problems with is the
>> first nested function get's the argument for the function name without
>> a previous reference to the argument name in the outer frames. So, a
>> function call to it is being made with the function name as the
>> argument, and that isn't visable so it looks as if it's magic.
>
>No, its not - but I stepped into that trap before - and thought its magic :)

It's magic until we understand it. ;)

I get the feeling that those who have gotten to know decorators find
them easy, and those who haven't, find them nearly impossible to
understand.  Which means there is a fairly large first few steps to
get over, then it gets easy.  There *is* some underlying processes
being made, which is also the reason that makes them attractive. Less
type/declare/organize/etc...  but that is also what causes the
difficulty in understanding and using them at first.  

>The trick is to know that
>
> - a decorator is a callable
> - get passed a callable
> - has to return a callable
>
>So this is the simplest decorator imaginable is:
>
>def identity(f):
>    return f
>
>And the decorator _syntax_ is just a python expression that has to be
>_evaluated_ to a yield decorator. So
>
>@identity
>def foo(self):
>    pass

This much I understand. 

>the @identity is just the expression evaluated - to the function reference
>to identity, which is callable and follows the decorator protocol - and the
>_result_ of that evaluation is called with the callable in question.

This tells me what it is, and what it does, but not how it works.  How
is the ***expression evaluated***,  what is the ***decorator
protocol***.

Those are the parts I'm trying to understand at this point.  I know
this is the equivalent of looking behind the curtains to reveal the
little man who is the wizard.  But I can't resist. :)

>So if you want to have _parametrized_ decorators, that expression is
>_evaluated_ and has to yield a decorator. Like this:
>

There's that word again... **evaluated**.  How?

>def arg_decorator(arg):
>    def real_decorator(f):
>        return f
>    return real_decorator
>
>So, this works 
>
>@arg_decorator('fooobar')
>def foo(self):
>    pass
>
>@arg_decorator('fooobar') is evaluated to real_decorator (which a scope
>containing arg), and _that_ gets called with foo.
>

So if I'm following you right?

When the interpreter gets to the line @arge_decorator('fooobar')

it does the following?

foo = arg_decorator('fooobar')(foo)() #?      

(experiment with idle a bit...)

Ok I got it. :)

I wasn't aware that the form:

	result = function(args)(args)

Was a legal python statement.

So python has a built in mechanism for passing multiple argument sets
to nested defined functions! (click)  Which means this is a decorator
without the decorator syntax.

def arg_decorator(arg1):
    def real_decorator(function):
		def wrapper(arg2)
        return f(arg2)
    return real_decorator

def foo(arg2):
    pass
foo = arg_decorator('fooobar')(foo)(2arg)

The apparent magic is the silent passing of the second two arguments.

So this isn't a decorator question any more.  Each argument gets
passed to the next inner defined function,  via... a stack(?)  ;)

Somehow I think I've completed a circle.  LOL

Cheers,
Ron


>HTH - bit me the first time too :)



From opstad at batnet.com  Fri Apr  1 15:42:17 2005
From: opstad at batnet.com (Dave Opstad)
Date: Fri, 01 Apr 2005 12:42:17 -0800
Subject: Attributes and built-in types
Message-ID: <opstad-E606C0.12421701042005@reader0901.news.uu.net>

Is it just an implementation limitation that attributes cannot be 
assigned to instances of internal types?

---------------------------
>>> x = 4
>>> type(x)
<type 'int'>
>>> class Test(int):
...   pass
... 
>>> y = Test(4)
>>> type(y)
<class '__main__.Test'>
>>> y.someattr = 10
>>> x.someattr = 10
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'int' object has no attribute 'someattr'
---------------------------

When I did a dir(int) there was no __dict__ entry, but a dir(Test) 
showed a __dict__entry, which is why (presumably) the attribute 
assignment worked for Test but not for int.

Just curious...

Dave


From jerf at jerf.org  Sat Apr 23 14:33:40 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 23 Apr 2005 14:33:40 -0400
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
	<IFEpEp.7Gz@bath.ac.uk> <426A76A5.2050906@mage.hu>
	<d4e12i$u1s$1@sea.gmane.org>
	<mailman.2349.1114279982.1799.python-list@python.org>
Message-ID: <pan.2005.04.23.18.33.39.343242@jerf.org>

On Sat, 23 Apr 2005 20:13:24 +0200, Mage wrote:
> Avoid them is easy with set_type($value,"integer") for integer values and
> correct escaping for strings.

"Avoiding buffer overflows in C is easy, as long as you check the buffers
each time."

The *existence* of a technique to avoid problems is not in question. The
problem is when the language makes it easier to *not* do the checks than
to do the checks. Any look at the real world shows that that pattern
causes trouble, and that clearly, the mere *existence* of a way to not get
in trouble is not sufficient in the general case.

Despite the fact that all you have to do to avoid cutting your finger off
with a saw is not stick your finger in the saw, most people, even
carpentry professionals, are going to want to use finger-guards and other
safety equipment. A programmer turning down such security protection
(without another good reason, which does happen), is being like the guy
too macho to use the finger guard; stupidity induced by arrogance, not
some one no longer using training wheels. Using PHP and futzing with SQL
directly is probably not a good enough reason, as surely PHP has safer
libraries available. (If not, my opinion of PHP goes down another notch.)

Data binding with something like SQLObject makes it *easier* to be secure
than insecure; barring an out-and-out bug in SQLObject (given the nature
of the requisite bug, it is extremely unlikely to have survived this
long), a programmer must go *way* out of their way to introduce the SQL
injection attacks that so plague PHP projects.


From steven.bethard at gmail.com  Mon Apr  4 17:13:47 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 04 Apr 2005 15:13:47 -0600
Subject: StopIteration in the if clause of a generator expression
In-Reply-To: <eOg4e.2512$7b.37@trndny04>
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com> <_2R3e.3341$7b.3033@trndny06>
	<uqednS7IkJQ69M3fRVn-qQ@comcast.com> <eOg4e.2512$7b.37@trndny04>
Message-ID: <fqqdnVdRvpeXM8zfRVn-2g@comcast.com>

Raymond Hettinger wrote:
> [Steven Bethard]
> 
>>and I often find myself alternating
>>between the two when I can't decide which one seems more Pythonic.
> 
> Both are pythonic.
> 
> Use a genexp when you need a generator
> and use a listcomp when you need a list.

So do I read this right in preferring
     [<x> for <y> in <z>]
over
     list(<x> for <y> in <z>)
?

STeVe


From theller at python.net  Thu Apr 14 16:20:37 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 14 Apr 2005 22:20:37 +0200
Subject: distribute python script
References: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>
	<vPmdnUKBSeVrIcPfRVn-1Q@comcast.com>
	<1113505210.693247.143930@z14g2000cwz.googlegroups.com>
	<fyxtw4mq.fsf@python.net>
	<1113507196.290786.264710@z14g2000cwz.googlegroups.com>
Message-ID: <ekddun3e.fsf@python.net>

"codecraig" <codecraig at gmail.com> writes:

> Thanks so much Thomas!!!  I added encodings to my setup's...here it is
>
> setup(console=[{"script": 'monkey_shell.py'}], options={"py2exe":
> {"packages": ["encodings"]}})
>
> and i did the same for the other python script.
>
> Thanks!!

Cool.  The next py2exe version will include the encodings automatically,
unless this is overridden with the '-a' or '--ascii' command line
option.

Thomas


From simon.brunning at gmail.com  Wed Apr 20 08:08:54 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 13:08:54 +0100
Subject: goto statement
In-Reply-To: <d45gap$elj$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
Message-ID: <8c7f10c60504200508486acf1a@mail.gmail.com>

On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
> WOW, just greate! ... but i'd like to relax at some more interesting way than to comment each of rows

Get a decent text editor.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From KittyMCooper at gmail.com  Wed Apr 27 19:26:02 2005
From: KittyMCooper at gmail.com (MsKitty)
Date: 27 Apr 2005 16:26:02 -0700
Subject: win32ui CreateFileDialog SLOW (since the SP2 Windows XP patch?)
Message-ID: <1114644362.619393.317800@l41g2000cwc.googlegroups.com>

My client is used to clicking on the script name on her PC and getting
a windows command line box which it runs in. Not fancy but did the job
until recently...

Now it can take up to 4 minutes for the file dialog box to appear. No
problems with speed in PythonWin, of course, but she is not used to
doing that. Any suggestions? Anyone know why it is so slow?

Here is the code snippet to open her input file (output goes in the
same directory so we have to get the directory path for that)

try:
	d=win32ui.CreateFileDialog(1)
	d.DoModal()
	inputpath=d.GetPathName()
	inputsplit=string.split(inputpath,"\\")
	inputdir = string.join(inputsplit[:-1],"\\")
	inputname=d.GetFileName()
	if printit:
		print "input file is ",inputname
	try:
		input = open(inputname,"r") # expects text to mark up
	except:
		print "Error opening input file",inputname
		if inputname:
			print "Invalid Input File ",inputname
			line = raw_input()
		sys.exit(2)

(there's another except later in the code ...)

Kitty
OpenSkyWebDesign.com



From test1dellboy3 at yahoo.co.uk  Sat Apr  2 05:01:30 2005
From: test1dellboy3 at yahoo.co.uk (test1dellboy3 at yahoo.co.uk)
Date: 2 Apr 2005 02:01:30 -0800
Subject: How to reload local namespace definitions in the python interpreter?
Message-ID: <1112435996.697236.231800@l41g2000cwc.googlegroups.com>

Hi,

I am a beginner using the python interpreter. To reduce typing effort,
I created a module called "aliases.py" containing some aliases for
objects I commonly use like -

aliases.py :


import filecmp, os, commands

op = os.path
go = commands.getoutput
dc = filecmp.dircmp
p1 = '/mnt/usbkey/flash/'
p2 = '/mnt/fat32/myfiles/flash/'

When I start up the interpreter, I can simply type -

from aliases import *

This works fine, but each time I change any of the definitions in
aliases.py, I
have to restart the interpreter and type "from aliases import *"
again. Is there any way to reload these definitions without restarting
the interpreter?

-Slath



From taroso at gmail.com  Fri Apr  1 02:00:39 2005
From: taroso at gmail.com (TSO)
Date: 31 Mar 2005 23:00:39 -0800
Subject: [python-perl] Translation review?
Message-ID: <fefcdfb7.0503312300.5477345c@posting.google.com>

Hi there,



I've recently tried to translate some Perl code into Python - code is below.


Is there a more Pythonic form?


Also, is there a good reason why there are plans to remove lambda from the language?


yrs complements-of-the-season-ly...






==== START OF CODE








## 2005-04-01 - TSO
## with apologies to Erudil

import sys,math;[


                                           vars()
                                       .__setitem__(
           "ham",                  lambda(spam):("").
       join([chr((               spam/144**i)%(02*72))
  for(i)in  xrange(             int(math.log(spam**0.5,
12)+1))])),[(lambda*           spam:globals().update({}
.__class__([spam])))(        ham(spam),eval(ham(__spam))
 )for(spam,__spam)in[      (47631497714,0x3A305499C7D37),
        (47159984399,    2337674),(327499859,2336509),(8901
       +34553*10000,   2402179),(6303405375459,2295612),(11+
      7540504603011,  303839094),(95,2295612),(7540504603011,
     303839094),(95,0x16241495E6D60314676F55F45E4D3F906),(216*
     10529,0x1053924DE35309345),(0x6DB401B64DC,0x262efd)]]and(_)
     (ham(231280211),[bacon(spam,ham(0x65936781522))()for(spam)in
      crispy(bacon(bacon((bacon(eggs,ham(0x1051936D9600B6F4F)))(0)
      ,ham(6296985467094)),ham(390129778476214073077203)))]+[bacon(
       ham(32),ham(48473858995))()]),_(ham(110),(lovely)(Spam(cheese
        ,SPAM))),_(ham(231280211),[[int((lambda spam:bacon(bacon(ham
         (32),ham(48473858995))(),ham(330651610))([ham(6961)[bacon((
           spam),ham(+906698009388057))()]for(spam)in(spam)]))(spam+
             spam_),2)for(spam,spam_)in(lambda(spam):[(spam)for(spam)
               in(_spam)(spam[::2],spam[1::2])])(list(_spam(*spam)))]
                  for(spam)  in(lambda(spam):list(_spam(spam[::2],spam
                                [1::2])))([(spam+ham   (32)*n)[:n]for(
                                   spam)in(SPAM)        ])])or(Spam)((
                                      bacon)(           bacon(eggs,ham
                                                        (7233055643059
                                                         )),ham(224343
             +                                           11402701*10**
             6+                                          30804988*10**
              14)                                         ),[(spam)for
              spam                                       in(_spam)(*[
             (ham(                                       668732698837
              )%(spam_                                  ,_spam),ham(
               668732698                               *1000+837)%(
                _spam,spam_                           ))for(_spam,
                 spam_)in(_spam)                    (*Spam(lambda
                   (spam_,_spam):                   [bacon(bacon
                     (ham(32),ham(                 0xB494463B3)
                       )(),ham(610+               330651000))(
                        [_spam[spam]for(spam)in(spam)[::spam_
                         *-2+1]])for(spam)in(SPAM)],Ham([ham
                          (0x40BA541813CECF0323A994C40AA00)
                             ,ham(412853488783846916352+
                                20980637114201*10**21
                                      )])))])])]

== END OF CODE


From newsuser at stacom-software.de  Tue Apr 26 05:06:24 2005
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Tue, 26 Apr 2005 11:06:24 +0200
Subject: Howto debug c++ (SWIG) extension under Windows
Message-ID: <d4l0ah$hqe$01$1@news.t-online.com>

Hi alltogether,

I use ActivePython 2.4.1 , also the debug part from 
http://ftp.activestate.com/ActivePython/etc/ and VC 6.0 unter Windows XP.

I can't figure out howto debug my c++ extension. If i compile it as 
release version, I've of course no chance to set a breakpoint. If I 
compile as debug I get the Error-window:

... missing MSVCR71D.dll ...

when I try to start or debug my application. Now I've only ;-) two 
questions:

1) Is it possible to debug a C++ extension in that environment anyhow ?
2) How do I have to setup the development environment in that I can debug ?

Thank you in advance for your ideas, links, help, hints or whatever ...

Regards
Alexander


From usenet at zly_adres.com  Fri Apr 29 21:48:37 2005
From: usenet at zly_adres.com (CYBER)
Date: Sat, 30 Apr 2005 03:48:37 +0200
Subject: [wxPython] Many wxPanel forms in 1 wxFrame
Message-ID: <d4uo3o$1ee4$1@node3.news.atman.pl>

Is this possible to create 1 wxFrame and
register more than 1 wxPanel in it.
And select the one you want to show at the moment ?

I'm trying to implement a multistep wizard under wxPython.
I need to be able to hide and show windows inside my
frame.

Help :)




From martin at v.loewis.de  Mon Apr 11 17:59:05 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 11 Apr 2005 23:59:05 +0200
Subject: NSInstaller Vs. Inno Setup
In-Reply-To: <1113250756.207904.29670@f14g2000cwb.googlegroups.com>
References: <1113250756.207904.29670@f14g2000cwb.googlegroups.com>
Message-ID: <425AF329.6030603@v.loewis.de>

dcrespo wrote:
> Any comments?

MSI.

Martin


From ivanlan at pauahtun.org  Fri Apr  1 15:32:36 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Fri, 01 Apr 2005 13:32:36 -0700
Subject: string goes away
References: <20050401113753.2hhq78s8z7nocwoo@mcherm.com>
Message-ID: <424DAFE4.A0F75D9A@pauahtun.org>

Hi All--

Michael Chermside wrote:
> 
> The REAL lesson here is that you shouldn't follow any "optimization"
> rules without actually testing them. If you don't have time to test,
> then just don't optimize... write whatever is most readable. If you
> NEED more speed, then profiling and testing will show you what to
> fix. (Using a better algorithm is a different story... do that
> whenever you need it.)
>

Tim Peters sayeth, "Premature Optimization is the Root of All Evil." 
And he is not kidding.

Ever try to persuade a boatload of Java programmers that?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From gene.tani at gmail.com  Fri Apr  1 20:36:44 2005
From: gene.tani at gmail.com (gene.tani at gmail.com)
Date: 1 Apr 2005 17:36:44 -0800
Subject: Ternary Operator in Python
In-Reply-To: <d2jj9k$6o7$00$1@news.t-online.com>
References: <mailman.1173.1112340305.1799.python-list@python.org>
	<d2jj9k$6o7$00$1@news.t-online.com>
Message-ID: <1112405804.458174.114250@o13g2000cwo.googlegroups.com>

The good ol' DiveInto says:

http://diveintopython.org/power_of_introspection/and_or.html#d0e9975

http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52310

Diez B. Roggisch wrote:
> praba kar wrote:
>
> > Dear All,
> >     I am new to Python.  I want to know how to
> > work with ternary operator in Python.  I cannot
> > find any ternary operator in Python.  So Kindly
> > clear my doubt regarding this
>
> There is no ternary operator in python. There are several idioms that
can be
> used to emulate one to a certain degree - but they are scolwed on by
quite
> a few people. So better to not use them and just do it in a if: else:
> clause. 
> 
> -- 
> Regards,
> 
> Diez B. Roggisch



From captainrobbo at gmail.com  Fri Apr  8 11:51:49 2005
From: captainrobbo at gmail.com (Andy Robinson)
Date: 8 Apr 2005 08:51:49 -0700
Subject: Tutorial at Python-UK, Oxford, 19 May - handful of places left
Message-ID: <1112975509.841509.287200@o13g2000cwo.googlegroups.com>

Michele Simionato is giving a full day tutorial
titled "The Wonders of Python" at the UK Python
Conference, Randolph Hotel, Oxford on 19 May.
(This replaces Alex Martelli, who is now working
for Google in California).  The program is here:

 https://www.accu.org/conference/python_tutorial.html

This is a fantastic opportunity to boost your Python
skills and catch up on the newer features of the
language, for a fraction of the price of a professional
training course.  The course costs ?135 for ACCU members
and ?160 for non-ACCU.

There are still a few places left; anyone wishing to
attend should directly contact the organisers,
Archer Yates Associates, whose details are on the
bottom left corner of the page.


Best Regards


Andy Robinson
UK Python Conference program chair



From MrJean1 at gmail.com  Sun Apr 17 04:30:06 2005
From: MrJean1 at gmail.com (MrJean1)
Date: 17 Apr 2005 01:30:06 -0700
Subject: whitespace , comment stripper, and EOL converter
In-Reply-To: <1113713669.255207.39580@f14g2000cwb.googlegroups.com>
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
	<1113713669.255207.39580@f14g2000cwb.googlegroups.com>
Message-ID: <1113726606.945042.71820@z14g2000cwz.googlegroups.com>

There is an issue with both my and your code: it only works if doc
strings are triple quoted and if there are no other triple quoted
strings in the Python code.

A triple quoted string used in an assignment will be removed, for
example this case

  s  =  '''this string should not be removed'''


It is still unclear how to distinguish doc strings from other strings.
Also, I have not checked the precise Python syntax, but doc strings do
not need to be enclosed by triple quotes.  A single quote may be
allowed too.

Maybe this rule will work: a doc string is any string preceded by a
COLON token followed by zero, one or more INDENT or NEWLINE tokens.
Untested!

/Jean Brouwers



M.E.Farmer wrote:
> Thanks Jean,
> I have thought about adding docstrings several times, but I was
stumped
> at how to determine a docstring from a regular tripleqoted string ;)
> I have been thinking hard about the problem and I think I have an
idea.
> If the line has nothing before the start of the string it must be a
> docstring.
> Sounds simple enough but in Python there are 12 or so 'types' of
> strings .
> Here is my crack at it feel free to improve it ;)
> I reversed  the logic on the comments and docstrings so I could add a
> special mode to docstring stripping ...pep8 mode .
> Pep8 mode only strips double triple quotes from your source code
> leaving the offending single triple quotes behind. Probably just
stupid
> but someone might find it usefull.
>
######################################################################
> # Python source stripper
>
######################################################################
>
> import os
> import sys
> import token
> import keyword
> import StringIO
> import tokenize
> import traceback
> __credits__ = '''
> J?rgen Hermann
> M.E.Farmer
> Jean Brouwers
> '''
> __version__ = '.8'
> __author__ = 'M.E.Farmer'
> __date__ =  'Apr 16, 2005,' \
>             'Jan 15 2005,' \
>             'Oct 24 2004' \
>
>
>
######################################################################
>
> class Stripper:
>     """Python source stripper
>     """
>     def __init__(self, raw):
>         self.raw = raw
>
>     def format(self, out=sys.stdout, comments=0, docstrings=0,
>                 spaces=1, untabify=1, eol='unix'):
>         """ strip comments,
>             strip docstrings,
>             strip extra whitespace and lines,
>             convert tabs to spaces,
>             convert EOL's in Python code.
>         """
>         # Store line offsets in self.lines
>         self.lines = [0, 0]
>         pos = 0
>         # Strips the first blank line if 1
>         self.lasttoken = 1
>         self.temp = StringIO.StringIO()
>         self.spaces = spaces
>         self.comments = comments
>         self.docstrings = docstrings
>
>         if untabify:
>            self.raw = self.raw.expandtabs()
>         self.raw = self.raw.rstrip()+' '
>         self.out = out
>
>         # Have you ever had a multiple line ending script?
>         # They can be nasty so lets get them all the same.
>         self.raw = self.raw.replace('\r\n', '\n')
>         self.raw = self.raw.replace('\r', '\n')
>         self.lineend = '\n'
>
>         # Gather lines
>         while 1:
>             pos = self.raw.find(self.lineend, pos) + 1
>             if not pos: break
>             self.lines.append(pos)
>
>         self.lines.append(len(self.raw))
>         self.pos = 0
>
>         # Wrap text in a filelike object
>         text = StringIO.StringIO(self.raw)
>
>         # Parse the source.
>         ## Tokenize calls the __call__
>         ## method for each token till done.
>         try:
>             tokenize.tokenize(text.readline, self)
>         except tokenize.TokenError, ex:
>             traceback.print_exc()
>
>         # Ok now we write it to a file
>         # but we also need to clean the whitespace
>         # between the lines and at the ends.
>         self.temp.seek(0)
>
>         # All this should be written into the
>         # __call__ method just haven't yet...
>
>         # Mac CR
>         if eol == 'mac':
>            self.lineend = '\r'
>         # Windows CR LF
>         elif eol == 'win':
>            self.lineend = '\r\n'
>         # Unix LF
>         else:
>            self.lineend = '\n'
>
>         for line in self.temp.readlines():
>             if spaces == -1:
>                 self.out.write(line.rstrip()+self.lineend)
>             else:
>                 if not line.isspace():
>                     self.lasttoken=0
>                     self.out.write(line.rstrip()+self.lineend)
>                 else:
>                     self.lasttoken+=1
>                     if self.lasttoken<=self.spaces and self.spaces:
>                         self.out.write(self.lineend)
>
>     def __call__(self, toktype, toktext,
>                  (srow,scol), (erow,ecol), line):
>         """ Token handler.
>         """
>         # calculate new positions
>         oldpos = self.pos
>         newpos = self.lines[srow] + scol
>         self.pos = newpos + len(toktext)
>
>         # kill comments
>         if self.comments:
>             if toktype == tokenize.COMMENT:
>                 return
>
>         # kill doc strings
>         if self.docstrings:
>             # Assume if there is nothing on the
>             # left side it must be a docstring
>             if toktype == tokenize.STRING and \
>                 line.lstrip(' rRuU')[0] in ["'",'"']:
>                 t = toktext.lstrip('rRuU')
>                 if (t.startswith('"""') and
>                     (self.docstrings == 'pep8' or
>                      self.docstrings =='8')):
>                      return
>                 elif t.startswith('"""') or t.startswith("'''"):
>                      return
>
>         # handle newlines
>         if toktype in [token.NEWLINE, tokenize.NL]:
>             self.temp.write(self.lineend)
>             return
>
>         # send the original whitespace
>         if newpos > oldpos:
>             self.temp.write(self.raw[oldpos:newpos])
>
>         # skip indenting tokens
>         if toktype in [token.INDENT, token.DEDENT]:
>             self.pos = newpos
>             return
>
>        # send text to the temp file
>         self.temp.write(toktext)
>         return
>
######################################################################
>
> def Main():
>     import sys
>     if sys.argv[1]:
>         filein = open(sys.argv[1]).read()
>         Stripper(filein).format(out=sys.stdout,
>                  comments=0, docstrings=1, untabify=1, eol='win')
>
######################################################################
> 
> if __name__ == '__main__':
>     Main()



From ramon.aragues at gmail.com  Fri Apr 29 06:28:18 2005
From: ramon.aragues at gmail.com (ramon.aragues at gmail.com)
Date: 29 Apr 2005 03:28:18 -0700
Subject: Persistent python object and the Web
References: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
	<426924f0.244123250@news.oz.net>
Message-ID: <1114770498.332741.133090@l41g2000cwc.googlegroups.com>

Thanks to all for your help.

My graphs are huge (and contain much more information than the list of
nodes and their edges... I am working with protein-protein interaction
networks) so I have decided to have a persistent object on the server.
I first had to make my objects "pickable" (which was not obvious, since
they also contain database connections) but I think now I am on the
right way. The only problem I see is that the web interface will be
slower, since it has to "load graph-process it -dump graph" after each
command, but I guess that is the price I'll have to pay.

Thanks a lot again!

Ramon



From lbates at syscononline.com  Thu Apr 21 10:59:54 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 21 Apr 2005 09:59:54 -0500
Subject: How can I verify that a passed argument is an interible
	collection?
In-Reply-To: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <4267BFEA.9070206@syscononline.com>

Others may know better ways but the 2 I know of are:

1) If you know that the arguments will be lists or tuples
you can use isinstance().

if not isinsance(arg, (list, tuple):
    print "arg must be list or tuple)

2) Or if you not you could see if the argument has next and
__iter__ methods (more general solution)

if  hasattr(arg, 'next') and not hasattr(arg, '__iter__'):
    # perform work on iterable

else:
    print "arg must be an iterable"


Larry Bates


Charles Krug wrote:
> List:
> 
> I'm working on some methods that operate on (mathematical) vectors as
> in:
> 
> def Convolution(x, y)
> """Returns a list containing the convolution of vectors x and y"""
> 
> Is there any way to determine at runtime that x and y are iterible
> collections?
> 
> Do I *coughs* simply *coughs* trap the exception created by:
> 
>     for v in x:
> 
> when v is a scaler quantity?
> 
> Thanks
> 
> 
> Charles
> 


From vishnu at acmet.com  Mon Apr 25 05:57:56 2005
From: vishnu at acmet.com (Vishnu)
Date: Mon, 25 Apr 2005 15:27:56 +0530
Subject: Changing a line in a text file
In-Reply-To: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
Message-ID: <001601c5497d$4304e0e0$0c00a8c0@vishnu>

Hi,
Here is the program for replacing 'line2' with 'newline'.

inp_file.txt contains,

line1
line2
line3
line4
EOF

#-- Program starts
#Get the inp file in to a list
inp_file_list = [x for x in open('inp_file.txt')]

#modify the desired line, Note: you should include newline
inp_file_list[1] = 'xxx\n'

#Open the same file
write_to_file = open('inp_file.txt', 'w')

#write the list in to the file
write_to_file.writelines(inp_file_list)

#close the file
write_to_file.close()

#-- Program ends

Hope someone will give better idea.
HTH,
Vishnu

-----Original Message-----
From: python-list-bounces+vishnu=acmet.com at python.org
[mailto:python-list-bounces+vishnu=acmet.com at python.org] On Behalf Of
kah
Sent: Monday, April 25, 2005 3:09 PM
To: python-list at python.org
Subject: Changing a line in a text file

How do I change a line in a file??

For example I have the follwing text in my file:

line1
line2
line3
line4

How do I replace 'line2' with 'newline'. Since the write operation in
python will  overwrite everything.

Regards,
Kah

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



From peter at engcorp.com  Wed Apr 20 11:52:45 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 11:52:45 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <mailman.2173.1114002239.1799.python-list@python.org>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
Message-ID: <IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>

Terry Hancock wrote:
> However, I used to make "off by one" errors all the time in both C and Fortran,
> whereas I hardly ever make them in Python.

This should probably be the overriding concern in this
case.

I can't remember the last time I made an off-by-one error
in Python (or, really, whether I ever have), whereas I
can't remember the last C program I wrote which didn't have
one.

> So I like Python's slicing because it "bites *less*" than intervals in C or Fortran.

+1 QOTW


From fdreger at amiga.pl  Wed Apr 27 06:53:18 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Wed, 27 Apr 2005 12:53:18 +0200
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
Message-ID: <d4nr7l$n$1@nemesis.news.tpi.pl>


U?ytkownik "monkey" <m at m.com> napisa? w wiadomo?ci 
news:426f562f$1_3 at rain.i-cable.com...

> If using Jython to complie, is the end-user need JRE instead of 
> Python
> installed, or need both of them?

Only JRE. Just like Java.

>> I don't know the exact details, but try using the compiled Python
>> scripts (bytecode). I believe they are semi-optimized and platform
>> independent. They are the .pyc and .pyo files generated when the 
>> script
>> is run.
> Is that means a .py convert to .pyc or .pyo, without the need of 
> "make file"
> as using py2exe?

.pyc files are generated every time a module (any .py file can be a 
module) is imported. So if you have a program, say, example.py, you 
just start the python interpreter and write:
>>> import example
And then example.pyc will appear beside example.py. This new file does 
not require example.py (you can even delete it), and works on any 
computer with Python installed (on Windows you can just double-click 
it)
If you start the Python interpreter using:
python -OO (if you are using Windows, you shoud start the interpreter 
from the command line, probably something like:
c:
cd \
python24\python -OO)
and then import your example.py, you will get a file example.pyo, 
which is also stripped of any documentation strings (a bit harder to 
decode).

regards,
Filip Dreger 




From grante at visi.com  Wed Apr 27 12:12:37 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 27 Apr 2005 16:12:37 -0000
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
	<116v84ftiq01ucb@corp.supernews.com>
	<426fb233$1_2@rain.i-cable.com>
Message-ID: <116vefldolc6p88@corp.supernews.com>

On 2005-04-27, monkey <m at m.com> wrote:

>> py2exe has nothing to do with C or make files.  You create a
>> setup.py file containing a couple lines of python.  You run
>> that python program, and you end up with an .exe file and some
>> associated .dll files.  I typically use inno-setup to create
>> an installer.exe that creates a desktop icon and start-menu
>> entry, but that's optional.
>
> Is py2exe used to make a .exe file to install .py, or make the self-contain
> .exe file of the program itself?


The latter.  It's not completely self contained, there is an
..exe and some dll files that need to be distributed together.
It's explained very clearly by the py2exe web site:

  http://starship.python.net/crew/theller/py2exe/

Never used google before?  Just go to www.google.com and type
in py2exe.  Click "search".  It's the first hit.
  
-- 
Grant Edwards                   grante             Yow!  Is something VIOLENT
                                  at               going to happen to a
                               visi.com            GARBAGE CAN?


From mwinrock at frontiernet.net  Sat Apr  2 18:28:17 2005
From: mwinrock at frontiernet.net (Mark Winrock)
Date: Sat, 02 Apr 2005 23:28:17 GMT
Subject: instance name
In-Reply-To: <99z3e.1157607$35.42889387@news4.tin.it>
References: <99z3e.1157607$35.42889387@news4.tin.it>
Message-ID: <lUF3e.356$y77.150@news02.roc.ny>

max(01)* wrote:
> hi.
> 
> is there a way to define a class method which prints the instance name?
> 
> e.g.:
> 
>  >>> class class_1:
> ...   def myName(self):
> ...     ????what should i do here????
> ...
>  >>> instance_1 = class_1()
>  >>> instance_1.myName()
> 'instance_1'
>  >>>
> 
> bye
> 
> macs

macs,

The object instance doesn't know about the identifier to which you 
assigned it (but see my example below using the inspect module).

If you are just trying to identify different instances, you can get a 
unique instance identifier from hash() function
	hash(instance1)

or
	self.__hash__(), or hash(self) from within the object

The default __str__ for a class will normally return something similar 
with more information , so that when you
	print instance_1
you get a string in the following format:
	<module.classname object at hashvalue>


The following is a very, very, very weak example of how you might use 
inspect to get the information you want. This is not a robust example at 
all, and I imagine it could have many ways it will fail. The init uses 
inspect information to dip into the source file and parse out the info 
-- like I said, this is not a robust parse.
# ------------------------
import os,sys

class class_1(object):
     def __init__(self):
         import inspect
         self.lineno = inspect.currentframe().f_back.f_lineno
         self.filename = inspect.currentframe().f_back.f_code.co_filename
         self.initial_instance = None

         try:
             # i'm not sure if filename is full path or not at this time
             f=open(self.filename,'r')
             lines=f.readlines()
             s = lines[self.lineno-1]
             split = s.split()
             try:
                 # find the assignment if possible
                 i = split.index('=')
                 self.initial_instance = split[i-1]
             except ValueError:
                 pass
         finally:
             f.close()

     def myName(self):
         print 'my initial instance was \'%s\''%(self.initial_instance)

if __name__ == '__main__':

     # two straight up examples
     instance_1 = class_1()
     instance_2 = class_1()

     instance_1.myName()
     instance_2.myName()

     #
     class_1().myName()

     c = instance_1

     c.myName()
# -----------------------------------------------

I got the following results:
my initial instance was 'instance_1'
my initial instance was 'instance_2'
my initial instance was 'None'
my initial instance was 'instance_1'



Best-regards,
Mark


From programmer.py at gmail.com  Mon Apr 25 22:30:18 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Mon, 25 Apr 2005 21:30:18 -0500
Subject: Pythonic way to do static local variables?
In-Reply-To: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <d52c72d2050425193044588a40@mail.gmail.com>

Well, if you're a c++ programmer, then you've probably ran into
`functors' at one time or another.  You can emulate it by making a
python object that is `callable'.

class functor:
	def __init__(self):
		self.ordered_sequence = [1, 2, 3, 4, 5]
	def __call__(self, arg1, arg2):
		self.ordered_sequence.extend((arg1,arg2))
		self.ordered_sequence.sort()
		
>>> f = functor()
>>> f(3,5)
>>> f.ordered_sequence
[1, 2, 3, 3, 4, 5, 5]

Hope that helps some.
jw

On 4/25/05, Charles Krug <cdkrug at worldnet.att.net> wrote:
> I've a function that needs to maintain an ordered sequence between
> calls.
> 
> In C or C++, I'd declare the pointer (or collection object) static at
> the function scope.
> 
> What's the Pythonic way to do this?
> 
> Is there a better solution than putting the sequence at module scope?
> 
> Thanks.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From greg at cosc.canterbury.ac.nz  Thu Apr 21 21:29:48 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 22 Apr 2005 13:29:48 +1200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <roy-30EA18.09365120042005@reader1.panix.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
Message-ID: <3cr2cnF6locm6U2@individual.net>

Roy Smith wrote:

> What would actually be cool is if Python were to support the normal math 
> notation for open or closed intervals.
 >
> foo = bar (1, 2)
> foo = bar (1, 2]
> foo = bar [1, 2)
> foo = bar [1, 2]
> 
> That would certainly solve this particular problem, but the cost to the 
> rest of the language syntax would be rather high :-)

Not to mention the sanity of everyone's editors when
they try to do bracket matching!

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From steffann at nederland.net  Wed Apr 20 08:08:37 2005
From: steffann at nederland.net (Sander Steffann)
Date: Wed, 20 Apr 2005 14:08:37 +0200
Subject: goto statement
In-Reply-To: <8c7f10c6050420031238ecc69a@mail.gmail.com>
Message-ID: <2B1A983EDCEC3447B22632B64F7264600B74B5@bill.office.computel.nl>

On 4/20/05, praba kar <prabapython at yahoo.co.in> wrote:
>    In Python what is equivalent to goto statement

An old user-friendly cartoon that might be relevant:
http://ars.userfriendly.org/cartoons/?id=20000506

Have fun :-)
Sander



From mwakabayashi at gmail.com  Tue Apr 19 20:17:55 2005
From: mwakabayashi at gmail.com (Mike)
Date: 19 Apr 2005 17:17:55 -0700
Subject: Writing to stdout and a log file
Message-ID: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>

I would like my 'print' statements to send its output to the user's
screen and a log file.

This is my initial attempt:

class StdoutLog(file):
    def __init__(self, stdout, name='/tmp/stdout.log',
mode='w',bufsize=-1):
        super(StdoutLog, self).__init__(name,mode,bufsize)
        self.stdout = stdout
    def write(self, data):
        self.stdout.write(data)
        self.write(data)

import sys
sys.stdout = StdoutLog(sys.stdout)
print 'STDOUT', sys.stdout

When the program is run the string is written to the log file but
nothing appears on my screen. Where's the screen output?

It looks like the superclass's write() method is getting called instead
of the StdoutLog instance's write() method.

The python documentation says 'print' should write to
sys.stdout.write() but that doesn't seem to be happening.

Any idea what's going one? 
Or ideas on how to debug this?

Thanks, Mike



From peter at engcorp.com  Fri Apr 22 17:41:00 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 22 Apr 2005 17:41:00 -0400
Subject: Python licence again
In-Reply-To: <87fyxilehj.fsf@pobox.com>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com>
Message-ID: <FtCdneI1TKgS8vTfRVn-1w@powergate.ca>

John J. Lee wrote:
> I will never pronounce thorough 'thurrow', though.  One must draw a
> line.

How *do* you pronounce it?  "Thurrow" seems to match
how I say the word, along with everyone else I've
ever met (until now?).

-Peter


From jstroud at mbi.ucla.edu  Fri Apr 15 00:58:08 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 14 Apr 2005 21:58:08 -0700
Subject: question about functions
In-Reply-To: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
References: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
Message-ID: <200504142158.08032.jstroud@mbi.ucla.edu>

Just pass a list. E.g.:

# start of ascript

def my_funk(alist):
  print "the first argument: %s" % alist[1]
  print "the second argument: %s" % alist[2]

mylist = ['wuzzup,','g?']

my_funk(mylist)

# end of ascript


Here is the output you expect:

the first argument: wuzzup,
the second argument: g?

On Thursday 14 April 2005 09:44 pm, chris patton wrote:
> Hi everyone.
>
> I have a question about passing arguments to python functions. Is there
> any way to make this job act like Perl?
>
> sub my_funk {
>
> print "the first argument: $_[0]\n";
> print "the second argument: $_[1]\n";  }
>
> In other words, can I call the arguments from a list?

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

http://www.jamesstroud.com/


From rkern at ucsd.edu  Mon Apr 25 10:50:26 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 07:50:26 -0700
Subject: New versions of numarray?
In-Reply-To: <1hvp61ttgpa9fsplvm9vkrd7io9d60vum9@4ax.com>
References: <1hvp61ttgpa9fsplvm9vkrd7io9d60vum9@4ax.com>
Message-ID: <d4ivpv$b9v$1@sea.gmane.org>

Matt Feinstein wrote:
> Hi--
> I notice that there are some new versions of numarray available for
> download-- is there any documentation on what's new/fixed/broken?

You could ask on the numarray list. When you do, you should specify what 
version you're coming from so you can get the appropriate answer. Or you 
can search Google Groups in comp.lang.python.announce for the numarray 
announcements. They contain the information you seek.

http://groups-beta.google.com/group/comp.lang.python.announce

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From rdm at rcblue.com  Wed Apr 13 05:06:11 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 02:06:11 -0700
Subject: Compute pi to base 12 using Python?
Message-ID: <6.2.1.2.2.20050413020222.060a2eb0@rcblue.com>

I need to figure out how to compute pi to base 12, to as many digits as 
possible. I found this reference, 
<http://mathworld.wolfram.com/Base.html>, but I really don't understand 
it well enough. Could someone show me how to do what I need?

Thanks,

Dick Moores
rdm at rcblue.com



From matthew_shomphe at countrywide.com  Fri Apr  1 14:48:56 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 1 Apr 2005 11:48:56 -0800
Subject: System bell
References: <BE723DD5.63FD%baza@themauvezone.fsnet.co.uk>
	<1112310983.885273.251200@f14g2000cwb.googlegroups.com>
	<d2i5vj$e7m$1@news6.svr.pol.co.uk>
	<mailman.1155.1112318334.1799.python-list@python.org>
Message-ID: <1112384936.858123.291170@f14g2000cwb.googlegroups.com>

Serves me right for blindlyrunning things from IDLE.

This does work (tested on WinXP only):
import os 
os.system('echo \a')



From michele.simionato at gmail.com  Mon Apr  4 01:00:09 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 3 Apr 2005 22:00:09 -0700
Subject: help with python-devel!!!
In-Reply-To: <hp5151pajasidblsvnrfnef4i9ms4pk49u@4ax.com>
References: <1112560641.532271.242920@g14g2000cwa.googlegroups.com>
	<hp5151pajasidblsvnrfnef4i9ms4pk49u@4ax.com>
Message-ID: <1112590809.737371.194100@z14g2000cwz.googlegroups.com>

Just give (as root)

# urpmi python-devel

(assuming you have configured urpmi properly, Google
for "easy urpmi").

             Michele Simionato



From fredrik at pythonware.com  Sun Apr 24 07:02:44 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 13:02:44 +0200
Subject: python sizeof ?
References: <1114333872.720156.255190@g14g2000cwa.googlegroups.com>
Message-ID: <d4fu2q$kt6$1@sea.gmane.org>

"ajikoe at gmail.com"

> How can I get the size of an object in python..?

you can't, and the size in bytes is mostly meaningless.

if you're looking for the size of a serialized/marshalled python
object, use len().

> analog with c sizeof?

Python's not C.  for more discussion, see:

    http://www.artima.com/forums/flat.jsp?forum=181&thread=67617

</F>





From kent37 at tds.net  Fri Apr 22 17:23:32 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 17:23:32 -0400
Subject: xmlrpclib.Server - how to disconnect
In-Reply-To: <1114195692.790677.204010@o13g2000cwo.googlegroups.com>
References: <1114195692.790677.204010@o13g2000cwo.googlegroups.com>
Message-ID: <42696707$1_3@newspeer2.tds.net>

codecraig wrote:
> Hi,
>    If I create a connection to a and XML-RPC server, how can the client
> disconnect from the server?
> 
> CLIENT:
> url = "http://1.1.1.1:1234"
> server = xmlrpclib.Server(url)
> 
> server.doSomething()
> 
> now how do i disconnect my client from the server?

Are you sure this is a problem? xmlrpc uses HTTP/1.0 to connect. Looking at the code it seems to 
close the connection after each request.

Kent


From sjmachin at lexicon.net  Sun Apr 10 21:46:20 2005
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 11 Apr 2005 11:46:20 +1000
Subject: Dictonary persistance weirdness
References: <pan.2005.04.10.22.07.17.604742@datafull.com>
Message-ID: <2uij515umrjnma9o0nhbv4arm3katvv6pj@4ax.com>

On Sun, 10 Apr 2005 19:07:23 -0300, Gonzalo Sainz-Tr?paga (GomoX)
<gomoSINSPAM at datafull.com> wrote:

>-- wrappers.py -------------------------
>class VarsWrapper:
>    def __init__(self,req):
>        self.fs = util.FieldStorage(req)
>
>    def get_vars():
>        d = {}
>        for each in self.fs.list:
>            self.d[x.name] = x.value
>        return d
>

Are you sure that is the code that you are executing? What is "x"?
What is "self.d"? "each" is not used. Even if "x" and "self.d" do
exist, the for loop will do nothing, and the method will return an
empty dictionary.

You weren't trying to "optimise" the references to self.d inside the
loop, were you?

Making the charitable assumptions that d and self.d are the same thing
and so are "x" and "each":

Assuming self.d does exist, why does it exist? I.e for what reason do
you want the data to persist? Could its persistence be the cause of
your problem? Are you sure you are not accidentally always referring
to the same VarsWrapper instance?

Is that all that VarsWrapper contains? Seems to me like an unnecessary
and possibly confusing convolution. If you "own" util.FieldStorage,
then giving it an as_dictionary() method might be a good idea.
Otherwise a simple wrapper *function* that replaces your two-step
__init__ and get_vars would be a not unreasonable idea; there's no law
that says that everything must be a class. 

Are you sure you don't have a dict as a default arg somewhere, like in
def handle(self, vars={})  ??

HTH,

John



From rkern at ucsd.edu  Fri Apr 22 21:42:39 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 22 Apr 2005 18:42:39 -0700
Subject: Python licence again
In-Reply-To: <pa7j61tmttfgeb8b388mg836i4tla4dsig@4ax.com>
References: <42694858.1060702@geochemsource.com>	<mailman.2325.1114215999.1799.python-list@python.org>
	<pa7j61tmttfgeb8b388mg836i4tla4dsig@4ax.com>
Message-ID: <d4c8tp$toc$1@sea.gmane.org>

John Machin wrote:
> On Fri, 22 Apr 2005 17:26:19 -0700, Robert Kern <rkern at ucsd.edu>
> wrote:
> 
> 
> 
>>While you can, sort of, and people have already pointed out the 
>>appropriate web page to you, I ask that you *don't* use the PSF License. 
>>The PSF License uses proper nouns that you will have to change[1].
> 
> 
> and don't forget the pronouns  ... 
> 
> Seen in a too-hasty copy-paste-edit of the BSD licence:
> 
> IN NO EVENT SHALL <person's name suppressed> OR ITS CONTRIBUTORS BE
> LIABLE ...

Yes, I think I've been guilty of that from time to time, too.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From m at m.com  Wed Apr 27 09:43:16 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 21:43:16 +0800
Subject: Can .py be complied?
References: <d4mq31$gq3$1@domitilla.aioe.org><426ec8f7_2@rain.i-cable.com>
	<1114569158.396231.45460@z14g2000cwz.googlegroups.com>
	<1114569525.807638.48640@l41g2000cwc.googlegroups.com>
	<wrLbe.118$pe3.111@newsread3.news.atl.earthlink.net>
Message-ID: <426f96f4$1_2@rain.i-cable.com>

>
> But those files can be decompyled.
>

Hi, so which way to go?




From bjourne at gmail.com  Thu Apr 14 08:15:33 2005
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 14 Apr 2005 14:15:33 +0200
Subject: A little request about spam
In-Reply-To: <t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
Message-ID: <740c3aec05041405157cb90625@mail.gmail.com>

Please do not reply to spam. Replying to spam makes it much harder for
spam filters to catch all the spam or will produce very many false
positives. Atleast that's how gmail's filter works. And if you must
reply, please change the subject line.

On 13 Apr 2005 17:50:06 -0500, "."@bag.python.org <"."@bag.python.org> wrote:
> Nuf said.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
mvh Bj?rn


From oren at REMOVETHIS1.hishome.net  Mon Apr 18 14:39:48 2005
From: oren at REMOVETHIS1.hishome.net (Oren Tirosh)
Date: 18 Apr 2005 11:39:48 -0700
Subject: Removing dictionary-keys not in a set?
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
Message-ID: <cf052f0d.0504181039.1518bd2b@posting.google.com>

"Tim N. van der Leeuw" <tim.leeuwvander at nl.unisys.com> wrote in message news:<1113824946.525441.285760 at l41g2000cwc.googlegroups.com>...
> Hi,
> 
> I'd like to remove keys from a dictionary, which are not found in a
> specific set. 

Here's my magic English-to-Python translator:

"I'd like to ... keys which ..."  ->  "for key in"
"keys from a dictionary"          ->  "set(dictionary)"
"not found in a specific set"     ->  "-specificset"
"... remove keys ..."             ->  "del dictionary[key]"

Putting it all together:

>>> for key in set(dictionary)-specificset:
...    del dictionary[key]

Oren


From fritoj at netscape.net  Fri Apr  1 12:52:06 2005
From: fritoj at netscape.net (coffeebug)
Date: 1 Apr 2005 09:52:06 -0800
Subject: numeric module
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
Message-ID: <1112377926.560904.99110@f14g2000cwb.googlegroups.com>

I don't know much here...but is there an assumption you're making about
the machine word size to be greather than 24 bits?
Also, more to the point, does the function zeros() instantiate a
two-dimensional table? If so, does it populate the table with any
values?  The error looks like tbl[ ][ ] doesn't get defined.
Thanks for patience!



From rpmuller at gmail.com  Wed Apr  6 22:55:58 2005
From: rpmuller at gmail.com (RickMuller)
Date: 6 Apr 2005 19:55:58 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <7xr7hn8jba.fsf@ruckus.brouhaha.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<6p1951pop1pfh3j57r7gg568cn3bo4c7lg@4ax.com>
	<7xr7hn8jba.fsf@ruckus.brouhaha.com>
Message-ID: <1112842558.389934.120030@z14g2000cwz.googlegroups.com>

The combinatorics application is very close, since we use A(N) to
represent fermions in quantum mechanics.



From jepler at unpythonic.net  Sun Apr 10 14:03:51 2005
From: jepler at unpythonic.net (jepler at unpythonic.net)
Date: Sun, 10 Apr 2005 13:03:51 -0500
Subject: Why does StringIO discard its initial value?
In-Reply-To: <XEb6e.556$Cz3.49700@monger.newsread.com>
References: <XEb6e.556$Cz3.49700@monger.newsread.com>
Message-ID: <20050410180350.GA19163@unpythonic.net>

Maybe this short interactive session can give you an idea why.

>>> from StringIO import StringIO
>>> b = StringIO("123456789")
>>> b.tell()
0
>>> b.write("abc")
>>> b.getvalue()
'abc456789'
>>> b.tell()
3

StringIO seems to operate like a file opened with "r+" (If I've got my modes
right): it is opened for reading and writing, and positioned at the beginning.
In my example, the write of 3 bytes overwrites the first 3 bytes of the file
and leaves the rest intact.  In your example your first write overwrote the
whole initial contents of the file, so you couldn't notice this effect.

Jeff
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From lucio.torre at gmail.com  Tue Apr 19 10:56:51 2005
From: lucio.torre at gmail.com (Lucio Torre)
Date: 19 Apr 2005 07:56:51 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <slrnd69cu7.1ab.klaus@main.szn.dk>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
	<1113830286.364709.164740@z14g2000cwz.googlegroups.com>
	<slrnd69cu7.1ab.klaus@main.szn.dk>
Message-ID: <1113922611.915845.256360@o13g2000cwo.googlegroups.com>


Klaus Alexander Seistrup wrote:
> Lucio Torre wrote:
>
> Say, are floats implemented?  Comparisons seem to work, but print'ing
> doesn't:
>
> #v+
>
> >>> 1.0 > 0.5
> True
> >>> print 1.23
> %.*g
> >>>
>
>
I think thats a problem with the printf implementation. Im using one
that came with codewarrior and maybe it doesnt parse %.*g .. (never
seen that format before)..

Lucio.



From ritterhaus at yahoo.com  Wed Apr  6 17:02:25 2005
From: ritterhaus at yahoo.com (ritterhaus at yahoo.com)
Date: 6 Apr 2005 14:02:25 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <d31g9v$k6j$01$1@news.t-online.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
	<d31g9v$k6j$01$1@news.t-online.com>
Message-ID: <1112821345.596432.255100@l41g2000cwc.googlegroups.com>

Actually, I've tried ALL of these things, and none of them work. I HAVE
run the simple for-print-sleep test code to try to determine if this
issue was specific to wx (that's good troubleshooting, folks - you
narrow down the problem) and even that didn't work, so I thought I'd
start with the simple problem first. Sorry if you were mislead.

As for wx, I HAVE used the for-setColour-refresh-update-sleep loop,
still no dice. The last thing the I put in the loop works (again, as if
all the changes are being queued) but the sleep just 'takes over' the
loop and nothing happens until al the sleeps are done. With or without
wx. Not good.



From news at NOwillmcguganSPAM.com  Thu Apr 14 06:36:25 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Thu, 14 Apr 2005 11:36:25 +0100
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
Message-ID: <425e47a9$0$26352$db0fefd9@news.zen.co.uk>

c3poptuse at yahoo.com wrote:
> Supercomputer and encryption and compression @ rate of 96%
> 
> The bit sent would be 0 and the key code would be F1-24,k 1-24,
> I 1-24,K 1-24,j24,j1,j12,j1,j6,j1,j3,j1,j2,j1 and would unzip or be new
> encryption you could encrypt or compress 100 terabits down to 1 bit of
> information. Now if you take this idea from my web site you could make
> this allot more complex and unbreakable. Data encryption 360 degrees
> rotation document 90 degrees and encrypt on every angel then 45 degrees
> change it two binary code do it again and again and fold it over like a
> piece of paper then having the one's and zero cancel each other out. In
> theory you could send a 100 terabit program to someone's computer and
> have it unzip and run and install or make
> A computer processor like the new 64 bit AMD have the bit unzip into a
> large ram drive and buffer use one half of the 64 bit processor decode
> the message and the main 64 bit run the numbers. Another way of doing
> this is to have a parallel computers with using one of the processes
> run the compressed 1 bit of information give the uncompressed a address
> on the ram drive to change and not even go threw the processor and then
> with different information on each machine compare and run statistics
> on information on a 45 tflops supercomputer and turn that 45 tflops
> computer into a 1 bit = 100,000 terabits to infinite as long as you
> have the ram for storage! with my calculations 45 tflops wouldn't
> matter any more it would be how much data you have on a 32bit operating
> system changing that to a 1 bit system it would be 32 * 45tflops would
> = 1440 tflops   Matter moves so fast that it intergreats and
> deintergreats faster then any speed we can see it like water from a
> hose at real close speed it moves in -------- lines.
> 

Please implement this as a Python module. I would like to compress my 
mp3 collection to single bits.

Will McGugan

-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From Serge.Orlov at gmail.com  Sat Apr  2 02:52:15 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sat, 2 Apr 2005 11:52:15 +0400
Subject: Installing Python on a Windows 2000 Server
References: <CTm3e.2461$tI6.928@fe2.columbus.rr.com>
Message-ID: <d2livf$1saa$1@news.comcor-tv.ru>

Mike Moum wrote:
> Hi,
>
> I'm a civil engineer who also doubles as chief programmer for
> technical applications at my company. Most of our software is written
> in Visual Basic because our VP in charge of I.T. likes to have
> "consistency", and at the moment we're a Microsoft shop. He has
> assigned me the task of developing an new application, the exact
> nature of which is not important for my question. I told him that, in
> my opinion, that Visual Basic was not the best choice for developing
> this application, and that I wanted to use Python. After a bit of
> discussion of the pros and cons, he said to go ahead. I managed to
> keep my jaw from hitting the floor. :>)
> We have a central server array running Windows Server 2000 (I think
> that's the right name; networking is not my specialty, but it's
> definately Windows). Some of our workstations run Windows 2000; others
> run Windows XP Pro. I would like to install Python on the server, and
> run the application that I'll be developing from the workstations,
> without having to install any Python components on the workstations
> themselves. In other words, the Python executable, and the various
> libraries, dll's, and what have you, as well as the application that
> I'm developing, should all reside on the server. The only thing on the
> workstations would be a shortcut to myapplication.py.
>
> Does anyone know whether it is possible to do this? I've done some
> Google searching, with no conclusive results, and poked about on
> python.org, but haven't really been able to find anything. Normally
> I'd be happy to just try it out and see what happens, but we're
> breaking new ground here (this is an amazingly big step for our
> hide-bound IS department!), so I'd like everything to go as smoothly
> as possible.

Try Movable Python http://www.voidspace.org.uk/python/movpy/
When you will be creating a shortcut to you application it shouldn't
point to yourapplication.py directly but rather at
\\yourserver\movpy\movpyw.exe \\yourserver\yourapp\yourapplication.py

  Serge.




From mylastnameruntogether at mycompanyname.com  Mon Apr 11 13:29:58 2005
From: mylastnameruntogether at mycompanyname.com (Brandon J. Van Every)
Date: Mon, 11 Apr 2005 17:29:58 GMT
Subject: web authoring tools
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>
	<mailman.1671.1113204815.1799.python-list@python.org>
Message-ID: <Xns96356AFD03D32vaneveryindiegamedes@207.69.189.191>

"Fredrik Lundh" <fredrik at pythonware.com> wrote in
news:mailman.1671.1113204815.1799.python-list at python.org: 

> Brandon J. Van Every wrote:
> 
>> Ideally, I would like an open source website + html design tool
>> implemented in Python
> 
> didn't you just say that ideally, you wanted a tool written in lisp or
> scheme? 

I honestly got a little tired of the tone of the answers I was getting
from that crowd, about what an idiot I am.  My query there is still
ongoing and perhaps genuinely useful answers will arise, but in the
interest of time I thought I'd initiate Plan B.  The Python universe has
a much larger cadre of web designers than the Lisp / Scheme universe, so
I figured the answers here would be of a higher quality.  I don't think
Python is appropriate to all programming tasks, but it's definitely
appropriate to web development and I wouldn't mind using / contributing
to open source web development tools written in it. 

> did you try the one frank wrote for you?
> 
>     http://groups-beta.google.com/group/comp.lang.lisp/msg/6df9eb74bfd1
>     6310 

No, because although it's amusing, it doesn't accomplish anything I wish
to accomplish.  Currently my website does exactly what I intend it to do.  
I want to see how long it is before I actually do something about it, and 
when people say "Your website is down" it actually amuses me.  Plus 
reminds me that perhaps I should do something.

> (for python tools, start here: http://www.python.org/topics/web/ )

Thanks!


-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

"The pioneer is the one with the arrows in his back."
                          - anonymous entrepreneur


From jobs at google.com  Fri Apr  1 03:09:03 2005
From: jobs at google.com (Google Jobs Autoresponder)
Date: Fri, 1 Apr 2005 00:09:03 -0800
Subject: (SPAM: 50) Mail Delivery (failure jobs-bangalore@google.com)
	(VIRUS REMOVED)
Message-ID: <200504010809.j31893dZ010696@cartman.corp.google.com>

We want to thank you for your interest in joining the Google team. We received
your email inquiry and look forward to the opportunity to review your background
and experience. Unfortunately, we are unable to give a personal reply to every
applicant. However, please know that we do review all resumes by hand so it
takes us just a little bit longer to get back to applicants we feel might be 
a fit for one of our positions. If you do not hear from one of us, we may not
have a position available for you at this time. We thank you for your patience 
and want to thank you again for your interest in Google. 

Google Staffing 
http://www.google.com/jobs.html


From martin at -xx-blecket-xx-.org  Mon Apr  4 09:46:58 2005
From: martin at -xx-blecket-xx-.org (Martin Magnusson)
Date: Mon, 04 Apr 2005 15:46:58 +0200
Subject: Problems compiling PIL under Cygwin
Message-ID: <1112622420.b10f3c33f4b325231e47d8cc95e09ded@teranews>

Hi group,

I'm trying to build PIL under Cygwin (for use with the Skencil vector 
graphics program), and I couldn't find a better forum for questions than 
this.

I'm using Python 2.3.4, and when I run "python setup.py build_ext -i" I 
get the following output:

running build_ext
building '_imaging' extension
gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes 
-DHAVE_LIBJPEG -DHAVE_LIBZ -I/usr/include/freetype2 -IlibImaging 
-I/usr/include -I/usr/local/include -I/usr/include/python2.3 -c 
libImaging/GifEncode.c -o 
build/temp.cygwin-1.5.12-i686-2.3/libImaging/GifEncode.o
C:\cygwin\bin\python2.3.exe (1352): *** unable to remap 
C:\cygwin\bin\tk84.dll to same address as parent(0x760000) != 0xBB0000
       4 [main] python 1984 sync_with_child: child 1352(0x238) died 
before initialization with status code 0x1
     282 [main] python 1984 sync_with_child: *** child state child 
loading dlls
error: Resource temporarily unavailable

Does anybody know what could be done to solve this?

/ martin


From paul at fxtech.com  Thu Apr 28 15:19:02 2005
From: paul at fxtech.com (Paul Miller)
Date: Thu, 28 Apr 2005 14:19:02 -0500
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <d4rb04$209$1@gemini.csx.cam.ac.uk>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk> <wh8ce.142$%o.107@fed1read05>
	<d4rb04$209$1@gemini.csx.cam.ac.uk>
Message-ID: <XFace.17198$UX1.12035@fe08.usenetserver.com>

Michael Hoffman wrote:
> Dave Benjamin wrote:
> 
>> I think you meant to write something like this:
>>
>> def attrsetter(obj, name, value):
>>     def _return_func():
>>         return setattr(obj, name, value)
>>     return _return_func
> 
> 
> Sure did. Sorry.

You guys have been very helpful!

While on the subject, is there an equivalent for "methodcaller"?

ie. if I want to bind a function which calls a specific method of an 
object with a specific parameter?



From steven.bethard at gmail.com  Wed Apr 13 11:36:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 09:36:09 -0600
Subject: Codig style: " or """
In-Reply-To: <mailman.1842.1113405204.1799.python-list@python.org>
References: <mailman.1842.1113405204.1799.python-list@python.org>
Message-ID: <6v-dnVnCJ7X7ocDfRVn-oA@comcast.com>

Sara Khalatbari wrote:
> Hi!
> 
> Suppose you're writing a module & writing the
> definition of each function in that module in " or
> """.
> for example:
> a) "This function does this & that"
> or:
> b)  """This function does blah blah blah"""
> 
> What are the differences between " and """ ? 
> I'm using gedit & I wanna know a bit about coding
> style.
> 
> To be very honest: I have a very strict boss who looks
> for bugs in my codes & he insists to know exactly
> which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
> my coding style on when using " or """.
> 
> Can anybody out there give me some hint?
> Can anybody tell me where to find a document on python
> coding style.

PEP 8:

http://www.python.org/peps/pep-0008.html

and for docstrings, PEP 257:

http://www.python.org/peps/pep-0257.html

which says:

For consistency, always use """triple double quotes""" around docstrings.

STeVe


From g.brandl at gmx.net  Mon Apr  4 11:27:46 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Mon, 04 Apr 2005 17:27:46 +0200
Subject: "specialdict" module
In-Reply-To: <mailman.1267.1112564712.1799.python-list@python.org>
References: <3bamhhF6j009lU1@individual.net>	<mailman.1264.1112560102.1799.python-list@python.org>	<3bb433F6fn6t3U1@individual.net>
	<mailman.1267.1112564712.1799.python-list@python.org>
Message-ID: <3bd4mfF6eagcoU1@individual.net>

Michael Spencer wrote:
> Georg Brandl wrote:
> 
>> 
>> I think I like Jeff's approach more (defaultvalues are just special
>> cases of default factories); there aren't many "hoops" required.
>> Apart from that, the names just get longer ;)
> 
> Yes Jeff's approach does simplify the implementation and more-or-less eliminates 
> my complexity objection
> 
> But why do you write:
> 
>      def __getitem__(self, key):
>          try:
>              return super(defaultdict, self).__getitem__(key)
>          except KeyError, err:
>              try:
>                  return self.setdefault(key,
>                            self._default[0](*self._default[1],
>                                             **self._default[2]))
>              except KeyError:
>                  raise err
> 
> rather than:
> 
>      def __getitem__(self, key):
>          return self.setdefault(key,
>                            self._default[0](*self._default[1],
>                                             **self._default[2]))
> 
> (which could catch AttributeError in the case of _default not set)
> I'm sure there's a reason, but I can't see it.

In your version, the default factory is called every time a value is
retrieved, which might be a performance problem.

>>>Alternatively, you could provide factory functions to construct the defaultdict. 
>>>  Someone (Michele?) recently posted an implementation of this
>> 
>> 
>> Yes, I think this could be reasonable.
> 
> 
> ...though this would more naturally complement a fixed-default dictionary IMO
> Your design permits - even encourages (by providing convenient setters) the 
> default to change over the lifetime of the dictionary.  I'm not sure whether 
> that's good or bad, but it's a feature worth discussing.

It's certainly more in the spirit of Python -- we're consenting adults,
and so we are allowed to change the default.

mfg
Georg


From mage at mage.hu  Mon Apr 18 14:29:39 2005
From: mage at mage.hu (Mage)
Date: Mon, 18 Apr 2005 20:29:39 +0200
Subject: packages
Message-ID: <4263FC93.5090104@mage.hu>

       Hello,

I read about modules and packages in the tutorial. I think I understand
how to use packages and modules, even I know how to create a module (as
far I understand it's a simple .py) file , but I don't know how can I
create a package and when should I do it.

Where should I look for more information?

       Mage



From finite.automaton at gmail.com  Fri Apr 29 15:18:57 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 29 Apr 2005 12:18:57 -0700
Subject: module exports a property instead of a class -- Evil?
References: <1114797779.371054.189950@g14g2000cwa.googlegroups.com>
Message-ID: <1114802337.216856.219870@l41g2000cwc.googlegroups.com>

The property factory is nice, but have you considered subclassing
property?

class Mode(property):
  def __init__(self, *vals):
    if [v for v in vals if not isinstance(v,str)]:
      raise ValueError, 'Mode values must be strings'
    else:
      self.values = list(vals)
    property.__init__(self, self.get, self.set)
  def get(self, instance):
     ... 
  def set(self, instance, value):
     ...



From ksenia.marasanova at gmail.com  Mon Apr 25 13:04:52 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Mon, 25 Apr 2005 19:04:52 +0200
Subject: web based file manager in python
Message-ID: <130df19305042510046ea432ad@mail.gmail.com>

Hi,

I didn't suceed in finding any kind of standard web based file
manager, written in Python. There are quite a lot for PHP (the nicest
I found is phpXplorer: http://www.phpxplorer.org) , but I'd rather use
Python. I don't mind installing one of the millions webframeworks for
this (well, except for Zope) :)
I know, it's not hard to write your own... I am just trying not
re-inventing the wheel this time :)
Any hints? 

Thanks!
-- 
Ksenia


From philippe at philippecmartin.com  Sun Apr 24 12:48:53 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Sun, 24 Apr 2005 16:48:53 GMT
Subject: [OT] Graphic editor within an MFC app. I have a wxPython
	prototype, that...
References: <pan.2005.04.24.22.29.27.952568@datec.at>
Message-ID: <V5Qae.50$461.49@newssvr11.news.prodigy.com>

Does that mean you are using C++/C# and not Python ?

I also guess you do not wish MFC and wxWindows to coexist in the same .exe
as the reasons for conflict are many (GDI port, main event loop .....)

Then do you simply wish to "map" your wxindows calls to equivalent MFC calls
with some kind of stub/glue?


Regards,

Philippe


F. GEIGER wrote:

> I have built a wxPython prototype of an app, that lets me place rectangles
> o a wxPanel, move them and change their size. How the rects are added
> and placed has to follow certain rules.
> 
> The final goal is to merge this "graphical editor" into a MFC app.
> Converting a standalone wxPython app into a wxWidget app ist not that
> complicated.
> 
> But how about merging it into a MFC app? Has anybody achieved that
> already?
> 
> All the functionality lies in my wxPanel-subclass "EditorWidget" and in
> the few widgets I can place on it. So it boils down to place that
> "EditorWidget" an a MFC-Panel. But what about the mainloops?
> 
> If that's not possibel at all, I'd consider getting an ActiveX that offers
> to me what I need. It does not need to be a full blown CAD ActiveX but
> should be customizeable. Does anyone know a source for such things?
> 
> Many thanks in advance and kind regards
> Franz GEIGER



From michele.simionato at gmail.com  Tue Apr 26 04:17:12 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Apr 2005 01:17:12 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
Message-ID: <1114503432.227799.52670@o13g2000cwo.googlegroups.com>

Mir Nazim:

> IMHO Zope3/Quixote seem to be the obvious choice here. > Though
> functionality is not available on them but i think time
> spent now will
> be gained by gains in better design and maintainable  code base.

Well, you are comparing two frameworks that are just
completely different. I suggest you to start evaluating
Quixote first, since it is much simpler to grasp,
and you can decide in a couple of days if it is the
platform you want to program in or not. Zope 3 is a
somewhat risky platform (i.e. you cannot leverage on
the existing Zope 2 applications and not many developers
are familiar with Zope 3 yet). Quixote too has a small
number of developers, but at least it is easy and you
don't need much help to work with it.

                 Michele Simionato

                 Michele Simionato



From fredrik at pythonware.com  Mon Apr 11 03:23:22 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 09:23:22 +0200
Subject: web authoring tools
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>
Message-ID: <d3d8ft$nug$1@sea.gmane.org>

Brandon J. Van Every wrote:

> Ideally, I would like an open source website + html design tool implemented
> in Python

didn't you just say that ideally, you wanted a tool written in lisp or scheme?

did you try the one frank wrote for you?

    http://groups-beta.google.com/group/comp.lang.lisp/msg/6df9eb74bfd16310

(for python tools, start here: http://www.python.org/topics/web/ )

</F> 





From caneff at gmail.com  Mon Apr 11 14:42:10 2005
From: caneff at gmail.com (ChinStrap)
Date: 11 Apr 2005 11:42:10 -0700
Subject: Creating a new instance of a class by what is sent in?
Message-ID: <1113244930.403334.66150@z14g2000cwz.googlegroups.com>

I am sorry if this is obvious, but I am not seeing it.  How would I go
about creating a new type that is of the same type as a class sent into
the function?

new = foo.__init__() refers to the current foo, not a new fresh
instance of my class.  The only way I can think of is to make a large
if-elif chain of isinstances, but that loses the generality I am after.

Thank you for your help.



From martijn at gamecreators.nl  Thu Apr 14 10:53:57 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 14 Apr 2005 07:53:57 -0700
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
Message-ID: <1113490437.037734.158740@g14g2000cwa.googlegroups.com>

And how do you get the data back ?

1+0=0 == 0+0=0
0+1=1 == 1+1=1

let's say you have the end key : 0
then you want to decompress it , but in what ? 0 0 or 1 0

;)



From modelnine at ceosg.de  Sat Apr  9 05:48:27 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sat, 9 Apr 2005 11:48:27 +0200
Subject: How to check whether a  list have specific value exist or not?
In-Reply-To: <d387jl$4h3$1@sea.gmane.org>
References: <20050409093226.96954.qmail@web8402.mail.in.yahoo.com>
	<d387jl$4h3$1@sea.gmane.org>
Message-ID: <200504091148.30320.modelnine@ceosg.de>

Am Samstag, 9. April 2005 11:37 schrieb Michael Spencer:
> praba kar wrote:
> > I want to check a list have specific
> > value or not. So If any one know regarding this
> > mail me
> A minute of two experimenting, would then lead you to:
>   >>> l = [1,2,3,4,5]
>   >>> l.index(3)
>
>   2

Or, if its that you just want to know whether a value is somewhere in an 
iterable:

>>> l = [1,2,3,4,5]
>>> 4 in l
True

See how there is special syntax to call the __contains__ method of the 
iterable automatically.

-- 
--- Heiko.
listening to: Pearl Jam - Rearviewmirror
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From mefjr75 at hotmail.com  Sun Apr 17 06:03:46 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 17 Apr 2005 03:03:46 -0700
Subject: whitespace , comment stripper, and EOL converter
In-Reply-To: <1113730429.336626.81360@g14g2000cwa.googlegroups.com>
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
	<1113713669.255207.39580@f14g2000cwb.googlegroups.com>
	<1113726606.945042.71820@z14g2000cwz.googlegroups.com>
	<1113730429.336626.81360@g14g2000cwa.googlegroups.com>
Message-ID: <1113732226.165477.295890@o13g2000cwo.googlegroups.com>

Google has now 'fixed' there whitespace issue and now has an auto-quote
issue argggh!

The script is located at:
 http://bellsouthpwp.net/m/e/mefjr75/python/stripper.py 

M.E.Farmer



From akineko at gmail.com  Fri Apr  8 00:02:48 2005
From: akineko at gmail.com (akineko at gmail.com)
Date: 7 Apr 2005 21:02:48 -0700
Subject: SWIG for Python - returning 64 bit value
Message-ID: <1112932968.041275.231310@f14g2000cwb.googlegroups.com>

Hello everyone,

I'm very new to SWIG and I'm trying to use SWIG to interface my Python
program to routines written in C. Only catch is it has to pass 40 bit
data both ways.

I found several postings in the Internet newsgroup related to such.
My swig interface file is:

%module ipc_msg
%{

%}

%typemap(in) unsigned long long cmd40b {
    $1 = (unsigned long long) PyLong_AsUnsignedLongLong($input);
}

%typemap(out) unsigned long long {
    $result = PyLong_FromUnsignedLongLong((unsigned long long) $1);
}

int open_ipc(void);
void close_ipc(void);
int update(int, unsigned long long cmd40b);
unsigned long long capture(int);

//

Now I confirmed a Python Long value is correctly sent to a C routine.
But I found the returned Python Long value from a C routine was
truncated to a 32 bit value (upper 32 bit).
After looking at the generated wrapper file, I found the reason.

>   result = (unsigned long long)capture(arg1);

There is no prototype of the function capture in the generated wrapper
code. Thus, the function was assumed to return an int (32 bit).

I added a prototype of the function manually.

> unsigned long long capture(int arg1);

Then Python received a correct 64 bit value from a C routine.

My question is:
(1) Am I missing something in my interface file?
The function prototype, unsigned long long capture(int); is already
there.
What else I need?
(2) Is this a bug in SWIG?
(3) Is there any work around rather than using a code insertion block ?

I tried to find an answer to this by reading SWIG manual and searching
the Internet, but so far not successful.

//

My platform is Solaris 9 (SUN Sparc) and I'm using Pthon 2.3 and Swig
1.3.24.

Any comments will be greatly appreciated.

Best regards,
Aki Niimura



From littlejohn.75 at news.free.fr  Thu Apr  7 15:57:40 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 07 Apr 2005 19:57:40 GMT
Subject: How to name Exceptions that aren't Errors
References: <3blfl8F6gt80jU1@individual.net>
Message-ID: <425590b4$0$18707$636a15ce@news.free.fr>

Le 7 Apr 2005 19:23:21 GMT, Leo Breebaart a ?crit :
> I've recently become rather fond of using Exceptions in Python to
> signal special conditions that aren't errors, but which I feel
> are better communicated up the call stack via the exception
> mechanism than via e.g. return values.
> 
> For instance, I'm thinking of methods such as:
> 
> 
>     def run(self):
>     """ Feed the input file to the simulator. """
> 
>         for linenr, line in enumerate(self.infile):
>             try:
>                 current_values = self.parse_line(linenr, line)
>==>         except CommentLineException:
>                 continue
>             results = self.do_one_simulation_step(current_values)
>             self.process_simulation_results(results)
> 
> 
> which I use in order to discard comments from a file I'm parsing
> line-by-line.
> 
[snip]
> 'Exception' prefix seems a bit redundant and pointless too. I
> suppose I could just call the exception "CommentLine" and leave
> it at that, but I don't know, maybe there's something better I'm
> overlooking.
You are overlooking the fact the flow of information is pretty much
linear. The comments lines can be safely ignored (filtered out) on the
fly.
                  enumerate             filter-out
infile(producer) --------> linenr, line -----------> linenr, line --->
> 
> Any suggestions?
 From your parse_line() method extract the logic to detect a comment line
put this code in a predicate function and use itertools.ifilter(pred,
iterable). Much more explicit. parse_line() is simplified. The client
code run() does not have to deal with bogus inputs anymore if you feed
it with the filtered out stream.
> 


From rkern at ucsd.edu  Mon Apr 25 14:59:02 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 11:59:02 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <1114454884.549187.122440@o13g2000cwo.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
Message-ID: <d4jec2$20g$1@sea.gmane.org>

Xah Lee wrote:
> I have produced my doc.
> ( http://xahlee.org/perl-python/python_re-write/lib/module-re.html )
> 
> isn't there a hundred dollars due to me?

No.

[Steve Holden]
>>The condition for winning the prize is that at least five regular
>>posters to c.l.py have to mail me and saythey think your version is
>>better.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From rune.strand at gmail.com  Tue Apr 12 18:48:59 2005
From: rune.strand at gmail.com (runes)
Date: 12 Apr 2005 15:48:59 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <u9io519uc5upv93l6sd8ssddbhdi50a41f@4ax.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<1113340181.174797.132250@f14g2000cwb.googlegroups.com>
	<u9io519uc5upv93l6sd8ssddbhdi50a41f@4ax.com>
Message-ID: <1113346139.139720.17510@o13g2000cwo.googlegroups.com>

Thank you for being so friendly!

I found the Howto through Google. Somehow I didn't see that link in the
documentation.

And please do not make any assumptions about my  reading of manuals.



From finite.automaton at gmail.com  Wed Apr 20 14:52:18 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 20 Apr 2005 11:52:18 -0700
Subject: Faster os.walk()
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
Message-ID: <1114023138.082762.277630@g14g2000cwa.googlegroups.com>

If you're trying to track changes to files on (e.g. by comparing
current size with previously recorded size), fam might obviate a lot of
filesystem traversal.

http://python-fam.sourceforge.net/



From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 09:28:51 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 14:28:51 +0100
Subject: preallocate list
In-Reply-To: <d3j4ds$njr$1@scotsman.ed.ac.uk>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
Message-ID: <d3j6p7$ntl$1@scotsman.ed.ac.uk>

Thanks for the suggestions. I guess I must ensure that this is my bottle 
neck.
<code>
     def readFactorsIntoList(self,filename,numberLoads):
	factors = []
         f = open(self.basedir + filename,'r')
         line = f.readline()
         tokens = line.split()
         columns = len(tokens)
         if int(columns) == number:
             for line in f:
                 factor = []
                 tokens = line.split()
                 for i in tokens:
                     factor.append(float(i))
                 factors.append(loadFactor)
         else:
             for line  in f:
                 tokens = line.split()
                 factors.append([float(tokens[0])] * number)
	return factors
</code>

OK. I've just tried with 4 lines and the code works. With 11000 lines it 
uses all CPU for at least 30 secs. There must be a better way.

Jim


From steven.bethard at gmail.com  Mon Apr  4 11:23:29 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 04 Apr 2005 09:23:29 -0600
Subject: Silly question re: 'for i in sys.stdin'?
In-Reply-To: <mailman.1293.1112619922.1799.python-list@python.org>
References: <d2q7ni$h3t$1@sea.gmane.org>	<mailman.1277.1112583592.1799.python-list@python.org>	<gJednSA9hrTLJM3fRVn-oA@comcast.com>
	<mailman.1293.1112619922.1799.python-list@python.org>
Message-ID: <oIydnTgwY9JpxszfRVn-3A@comcast.com>

Jeff Epler wrote:
> On Sun, Apr 03, 2005 at 09:49:42PM -0600, Steven Bethard wrote:
> 
>>Slick.  Thanks!
> 
> does isatty() actually work on windows?  I'm a tiny bit surprised!

Hmm...  I was just talking about using iter(f.readline, ''), but it does 
appear that isatty returns True for sys.stdin in the interactive prompt:

ActivePython 2.4.1 Build 245 (ActiveState Corp.) based on
Python 2.4.1 (#65, Mar 30 2005, 09:33:37) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
py> os.isatty(sys.stdin.fileno())
True

and at least some other things return False:

py> os.isatty(file('temp.txt').fileno())
False



STeVe


From bokr at oz.net  Wed Apr 20 04:22:54 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 08:22:54 GMT
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
	<3cm9r2F6nif67U1@individual.net>
	<d44vgg$jmr$04$1@news.t-online.com>
Message-ID: <42660fc2.42093557@news.oz.net>

On Wed, 20 Apr 2005 09:14:40 +0200, Peter Otten <__peter__ at web.de> wrote:

>Greg Ewing wrote:
>
>> Steve Holden wrote:
>> 
>>> I've been wondering whether it's possible to perform a similar analysis
>>> on non-mapping-type format strings, so as to know how long a tuple to
>>> provide,
>> 
>> I just tried an experiment, and it doesn't seem to be possible.
>> 
>> The problem seems to be that it expects the arguments to be
>> in the form of a tuple, and if you give it something else,
>> it wraps it up in a 1-element tuple and uses that instead.
>> 
>> This seems to happen even with a custom subclass of tuple,
>> so it must be doing an exact type check.
>
>No, it doesn't do an exact type check, but always calls the tuple method:
>
>>>> class Tuple(tuple):
>...     def __getitem__(self, index):
>...             return 42
>...
>>>> "%r %r" % Tuple("ab") # would raise an exception if wrapped
>"'a' 'b'"
>
>> So it looks like you'll have to parse the format string.
> 
>Indeed.
>
Parse might be a big word for

 >> def tupreq(fmt): return sum(map(lambda s:list(s).count('%'), fmt.split('%%')))
 ..
 >> tupreq('%s this %(x)s not %% but %s')

(if it works in general ;-)

Or maybe clearer and faster:

 >>> def tupreq(fmt): return sum(1 for c in fmt.replace('%%','') if c=='%')
 ...
 >>> tupreq('%s this %(x)s not %% but %s')
 3

Regards,
Bengt Richter


From dave at pythonapocrypha.com  Tue Apr 12 08:53:04 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Tue, 12 Apr 2005 06:53:04 -0600
Subject: Can't Stop Process On Windows
In-Reply-To: <lifm51hf5mhgl5sqf07a0uv8l0co0deu9h@4ax.com>
References: <lifm51hf5mhgl5sqf07a0uv8l0co0deu9h@4ax.com>
Message-ID: <425BC4B0.30000@pythonapocrypha.com>

Dan wrote:
> I have a python script running under Windows XP that I need to
> terminate from the keyboard.  A control-c works fine under Linux, but
> not under Windows.  I'm pretty sure that the culprit is 'select' that
> I'm using to multiplex socket i/o, which seems to be blocking the
> keyboard interrupt.  Is there some way around this?

Are you calling select with a long timeout? An alternative would be to call 
select with a much shorter timeout, but call it multiple times from a loop.


From grante at visi.com  Wed Apr 27 10:24:15 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 27 Apr 2005 14:24:15 -0000
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
Message-ID: <116v84ftiq01ucb@corp.supernews.com>

On 2005-04-27, monkey <m at m.com> wrote:

> Yes, I want more options. Since the python doc mentioned
> py2exe only, and it is difficult to understand how it
> work.(may be you guys know C and make file, but I am still
> foolish here...)

py2exe has nothing to do with C or make files.  You create a
setup.py file containing a couple lines of python.  You run
that python program, and you end up with an .exe file and some
associated .dll files.  I typically use inno-setup to create an
installer.exe that creates a desktop icon and start-menu entry,
but that's optional.

> Is that means a .py convert to .pyc or .pyo, without the need
> of "make file" as using py2exe?

Huh?  You don't need a make file for py2exe.

-- 
Grant Edwards                   grante             Yow!  I'd like TRAINED
                                  at               SEALS and a CONVERTIBLE on
                               visi.com            my doorstep by NOON!!


From kent37 at tds.net  Thu Apr 21 10:50:08 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 21 Apr 2005 10:50:08 -0400
Subject: Private class?
In-Reply-To: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
References: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
Message-ID: <4267b959$1_3@newspeer2.tds.net>

codecraig wrote:
> class EventListener:
>     def eventOccurred(self, eventType): pass
> 

The EventListener class is not needed in Python; you can include it for its documentation value if 
you like but Python does not require interfaces the way Java does.

> class EventBus:
>     EVENT_GROW_LEAVES = 0
> 
>     __listeners = {}
> 
>     def register(listener, eventType):
>         if __listeners.has_key(eventType):
>             curListeners = __listeners.get(eventType)
>             curListeners.append(listener)
>         else:
>             __listeners[eventType] = [listener]
> 
>     def fire(eventType):
>         if __listeners.has_key(eventType):
>             x = __listeners.get(eventType)
>             for l in x:
>                 l.eventOccurred(eventType)
> 
> ...so that is what I am thinking.  However, i guess my issue is how to
> make EventBus a singleton or prevent it from being instaniated and
> making it's methods statically accessible.

One way to do this is to make an EventBus module and make __listeners, register() and fire() be 
module attributes. Your client code would look like
import EventBus
...
EventBus.register(...)
EventBus.fire(...)

Kent


From northstar.eight at verizon.net  Sun Apr 10 08:41:06 2005
From: northstar.eight at verizon.net (Dhruva Hein)
Date: Sun, 10 Apr 2005 08:41:06 -0400
Subject: Help understanding code
Message-ID: <42591EE2.9040203@verizon.net>

Hi. I am trying to understand a section of code written for Plone and I 
am having problems understanding the Python syntax in a few of the 
following lines.

I'd be grateful if someone could help me understand what's happening in 
the lines I've marked. I can't see how the dictionary is built or how 
the lists ['bytype'][cytype] make sense in python.

Thanks in advance.

class Stats:

   def getContentTypes(self):
       """ Returns the number of documents by type """
       pc = getToolByName(self, "portal_catalog")
       # call the catalog and loop through the records
       results = pc()                                                   
               <=== what is the difference between pc and pc()?
       numbers = {"total":len(results),"bytype":{},"bystate":{}} <=== 
This is hard to understand
       for result in results:
           # set the number for the type
           ctype = str(result.Type)
           num = numbers["bytype"].get(ctype, 0)  <==== where does .get 
come from? and what is the string 'bytype' doing?
           num += 1
           numbers["bytype"][ctype] = num    <====== is this some kind 
of an array?

           # set the number for the state
           state = str(result.review_state)
           num = numbers["bystate"].get(state, 0)
           num += 1
           numbers["bystate"][state] = num
       return numbers



From sabbey at u.washington.edu  Fri Apr 15 19:45:55 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Fri, 15 Apr 2005 16:45:55 -0700
Subject: pre-PEP: Suite-Based Keywords
Message-ID: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>

Here is a pre-PEP for what I call "suite-based keyword arguments". The 
mechanism described here is intended to act as a complement to thunks. 
Please let me know what you think.

Suite-Based Keyword Arguments
-----------------------------

Passing complicated arguments to functions is currently awkward in Python. 
For example, the typical way to define a class property winds up polluting 
the class's namespace with the property's get/set methods.  By allowing 
keyword arguments to be defined in a suite following a function call, 
complicated arguments can be passed in a cleaner, easier way.

Examples
========

Using suite-based keyword arguments, the code

f(x = 1)

is equivalent to

f():
    x = 1

In general, a suite following a function call creates a new scope.  The 
bindings created in this scope get passed to the function as keyword 
arguments.

Suite-based keyword arguments can be mixed with regular arguments:

f(1, 2, y = 4):
     x = 1

Motivation
==========

One motivation for suite-based keywords is to allow cleaner definitions of 
properties.  Currently, properties are typically define as in this 
example:

class C(object):
    def getx(self):
       return self.__x
    def setx(self, value):
       self.__x = value
    def delx(self):
       del self.__x
    x = property(getx, setx, delx, "I'm the 'x' property.")

The 'getx', 'setx', and 'delx' methods get defined in the namespace of the 
class even though one wants only to pass them to 'property'.  Ideally, one 
would want these methods to be defined in their own namespace.  Also, it 
would be helpful when reading the code if the layout of the code gave 
visual indication that their only purpose is to be used in a property.

Using suite-based keyword arguments, and without any changes to the 
'property' type, this code can be written as:

class C(object):
    x = property():
       doc = "I'm the 'x' property."
       def fget(self):
          return self.__x
       def fset(self, value):
          self.__x = value
       def fdel(self):
          del self.__x

Here, 'fget', 'fset' and 'fdel' do not wind up as methods of the class, 
and it is visually clear that they are methods only for the 'x' property. 
Also, this code is less bug-prone since the name of each method need 
appear only once.

Passing callbacks in other situations is made similarly easier and 
cleaner:

setHandlers():
     def success():
         print 'success'
     def failure():
         print 'an error has occured'
     def apocalypse():
         print 'a serious error has occured'

a = [1,3,2]
a.sort():
     def cmpfunc(x,y):
         return cmp(x,y)

Situations that do not require callbacks can also be better organized 
using suite-based keywords.  For example, here is code as it would 
currently be written in Python:

if a:
     x = 1
else:
     x = 2
f(x=x)

When reading this code, one reaches the 'if' statment without knowing what 
its purpose is-- layout of the code does not indicate that the 'if' 
statement is calculating an argument to 'f'.  Also, it requires a binding 
that serves no purpose other than to hold an argument to 'f', yet this 
binding persists for the rest of the surrounding function.

Here is the same code using suite-based keyword arguments

f():
     if a:
         x = 1
     else:
         x = 2

When reading this code, it is easy to skip over everything that is 
involved in calling 'f', if one so desires.  Since the suite has its own 
namespace, one does not have to worry that the suite creates some bindings 
that will be important later in the function.


From codecraig at gmail.com  Wed Apr 20 17:05:33 2005
From: codecraig at gmail.com (codecraig)
Date: 20 Apr 2005 14:05:33 -0700
Subject: Define Constants
Message-ID: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>

Hi,
  I have a question about how to define constants.

  My directory structure looks like...

C:\
    --> abc.py
    --> utils
        --> __init__.py
        --> CustomThing.py

  Ok, CustomThing looks like...

TOP = 0
LEFT = 1

class CustomThing:
    def __init__(self):
        self.foo = "foo"



  so, from abc.py I have

from utils.CustomThing import CustomThing

print CustomThing.TOP

but i get an error: AttributeError: class 'CustomThing' has no
attribute 'TOP'


How can I access those??

Thanks.



From greg at cosc.canterbury.ac.nz  Thu Apr 21 21:29:35 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 22 Apr 2005 13:29:35 +1200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <3cr2caF6locm6U1@individual.net>

Antoon Pardon wrote:
> 
> This is nonsens. table[i] = j, just associates value j with key i.
> That is the same independend from whether the keys can start from
> 0 or some other value.

Also, everyone, please keep in mind that you always have
the option of using a *dictionary*, in which case your
indices can start wherever you want.

You can't slice them, true, but you can't have
everything. :-)

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From max2 at fisso.casa  Sat Apr  2 10:43:07 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 02 Apr 2005 15:43:07 GMT
Subject: redundant importr
In-Reply-To: <1MudnZ0j7M-bIdDfRVn-sA@powergate.ca>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<3avnh3F6cekgkU1@individual.net>
	<fZU2e.718439$b5.32462435@news3.tin.it>
	<juudnZEu35NXvNHfRVn-jg@powergate.ca>
	<Qkh3e.1153576$35.42709917@news4.tin.it>
	<1MudnZ0j7M-bIdDfRVn-sA@powergate.ca>
Message-ID: <f4z3e.1157512$35.42888414@news4.tin.it>

Peter Hansen wrote:
> max(01)* wrote:
> 
>> Peter Hansen wrote:
>>
>>> Not required except for performance reasons.  If the .pyc
>>> files don't exist, the .py files are recompiled and the
>>> resulting bytecode is simply held in memory and not cached
>>> and the next startup will recompile all over again.
>>
>>
>> but the other files *are* compiled, right? 
> 
> 
> Yes, definitely.  I did say that.
> 
>> so the initial question remains unanswered: 
> 
> 
> No it doesn't.  I thought I was clear, but I can reword
> it for you: the files are compiled *in-memory* and the
> results are never written to disk.
> 
>  > *if* they are compiled, where are they put, if the
> 
>> corresponding *.py files are on a non-writeable directory?
> 
> 
> They are not put anywhere.  Compilation is a process
> by which the source is converted to executable bytecodes.
> This says nothing about where either the source or the
> compiled result resides.  The actual compilation works
> on a long series of bytes in memory, and the result is
> just another long series of bytes.  Nothing requires that
> either of these things are even stored in a file.

ok, maybe it is an implementation-dependent issue after all.

i am working on a debian woody platform with the standard python2.3 package.

consider this:

max2 at 172.17.1.201:~/tmp/import-enigma$ ll
total 8
-rw-r--r--    1 max2     max2           36 2005-04-02 17:44 imported.py
-rw-r--r--    1 max2     max2           33 2005-04-02 17:44 importer.py
max2 at 172.17.1.201:~/tmp/import-enigma$ cat importer.py
import imported
imported.fun_1()
max2 at 172.17.1.201:~/tmp/import-enigma$ cat imported.py
def fun_1():
   print "I am fun_1()"
max2 at 172.17.1.201:~/tmp/import-enigma$ python importer.py
I am fun_1()
max2 at 172.17.1.201:~/tmp/import-enigma$ ll
total 12
-rw-r--r--    1 max2     max2           36 2005-04-02 17:44 imported.py
-rw-r--r--    1 max2     max2          307 2005-04-02 17:45 imported.pyc
-rw-r--r--    1 max2     max2           33 2005-04-02 17:44 importer.py
max2 at 172.17.1.201:~/tmp/import-enigma$

see?

bye

macs


From shama.bell at gmail.com  Fri Apr  1 12:38:10 2005
From: shama.bell at gmail.com (shama.bell at gmail.com)
Date: 1 Apr 2005 09:38:10 -0800
Subject: numeric module
Message-ID: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>

Hello,
What's the problem with this code? I get the following error message:

 File "test.py", line 26, in test
    print tbl[wi][bi]
IndexError: index must be either an int or a sequence

---code snippet----

from Numeric import *
tbl = zeros((32, 16))

def test():

    val = testme()
    wi = crc >> 4
    bi = crc & 0xFL
    print wi
    print bi
    print tbl[wi][bi]


def testme():
    val = 0xFFFFFFL
    val >>= 23
    return val

        
if __name__ == '__main__':
    test()

Thanks,
-SB



From gdamjan at gmail.com  Wed Apr 20 13:07:52 2005
From: gdamjan at gmail.com (Damjan)
Date: Wed, 20 Apr 2005 19:07:52 +0200
Subject: using locales
References: <1114013918.059442.30770@l41g2000cwc.googlegroups.com>
Message-ID: <42668c5c_2@x-privat.org>

> Is there some sort of tutorial on locales or the locale module?
> 
> I can't seem to find a list showing all possible locales. 

I think this depends on the platform

> Anyway, I'd love to have a method called get_available_locales to tell
> me what I can use on my machine, or something like that.
> 
> Can anyone tell me how I *do* get these names?

In linux (glibc) you can see all locales with "locale -a".


-- 
damjan


From finite.automaton at gmail.com  Tue Apr 26 17:13:23 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 26 Apr 2005 14:13:23 -0700
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <1114550003.643140.142900@f14g2000cwb.googlegroups.com>

A quick, hackish way to keep a static variable is to declare it as a
parameter and give it a default value.  The parameter list is evaluated
when the function is compiled, not when it is called.   The underscores
are added as per convention to indicate that the variable is
special/private.

Example-

def cumulative_sum(arg, __static__ = []):
    __static__.append(arg)
    return reduce(lambda a,b: a + b, __static__)

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

>>> cumulative_sum(1)
1
>>> cumulative_sum(1)
2
>>> cumulative_sum(1)
3



From vincent at visualtrans.de  Wed Apr 13 02:31:00 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Wed, 13 Apr 2005 08:31:00 +0200
Subject: Doubt regarding sorting of a list specific field
References: <mailman.1817.1113371391.1799.python-list@python.org>
Message-ID: <d3ieb4$fd8$1@news4.zwoll1.ov.home.nl>

"praba kar" <prabapython at yahoo.co.in> schrieb im Newsbeitrag 
news:mailman.1817.1113371391.1799.python-list at python.org...
| Dear All,
|
|    I have doubt regarding sorting. I have a list
| that list have another list (eg)
|
| list = [[1234,'name1'],[2234,'name2'],[0432,'name3']]

-> Be careful, 0432 is octal notation for 282.
|
| I want to sort only numeric value having array field.
| How I need to do for that.

You may want use the decorate-sort-undecorate idiom.
I othere words, you isolate the index you want to sort by,
sort on the indices, than get rid of the indices again.

Something like:

def sortSeqOfSeqs(seq, idx):
    tmp = sorted([(elem[idx], elem) for elem in seq])
    return [elem[1] for elem in tmp]

seq = [[1234,'name1'],[2234,'name2'],[1432,'name3']]
print sortSeqOfSeqs(seq, 0)
# prints [[1234, 'name1'], [1432, 'name3'], [2234, 'name2']]
# Or to sort by the name index
print sortSeqOfSeqs(seq, 1)
# prints [[1234, 'name1'], [2234, 'name2'], [1432, 'name3']]


Is this what you we're looking for?

--

Vincent Wehren








|
| with regards
| Prabahar
|
|
|
|
|
|
| ________________________________________________________________________
| Yahoo! India Matrimony: Find your life partner online
| Go to: http://yahoo.shaadi.com/india-matrimony 




From nyamatongwe+gravity at gmail.com  Tue Apr 12 02:51:21 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Tue, 12 Apr 2005 06:51:21 GMT
Subject: I've broken PythonWin2.4 - Dialogs don't pop up!
References: <1112815685.437815.285680@f14g2000cwb.googlegroups.com>
	<MPG.1cbefb05fd509d27989685@news-server>
	<1113262755.407761.92730@f14g2000cwb.googlegroups.com>
Message-ID: <MPG.1cc5c568dc4f974b989686@news-server>

Michael Murdock:

> Rebooting does not help. I uninstalled and removed everything from
> c:\python2.4 and then downloaded and installed the latest version.
> Right after installing it, everything worked fine. But when I rebooted,
> the problem came back. 

   Do you have a copy of win32ui.pyd on the system path?

   Neil


From codecraig at gmail.com  Fri Apr 15 11:51:57 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 08:51:57 -0700
Subject: py2exe - create one EXE
In-Reply-To: <mailman.1977.1113579964.1799.python-list@python.org>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<mailman.1977.1113579964.1799.python-list@python.org>
Message-ID: <1113580317.027071.183640@z14g2000cwz.googlegroups.com>

must have missed it on py2exe front page....and for google i didnt try
that search exactly.  Thanks though.  I was trying like "one executable
py2exe", etc.



From bill.mill at gmail.com  Wed Apr 20 13:09:17 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 20 Apr 2005 13:09:17 -0400
Subject: Troll? was: Re: goto statement
In-Reply-To: <d461cm$4c6$1@sea.gmane.org>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
	<d45to7$g02$1@news.tsystems.kiev.ua>
	<mailman.2184.1114013215.1799.python-list@python.org>
	<d460o7$g7j$1@news.tsystems.kiev.ua> <d461cm$4c6$1@sea.gmane.org>
Message-ID: <797fe3d40504201009182c45c6@mail.gmail.com>

On 4/20/05, Robert Kern <rkern at ucsd.edu> wrote:
> Maxim Kasimov wrote:
> > Andr? Roberge wrote:
> >
> >> Maxim Kasimov wrote:
> >>
> >>>
> >>> by the way, "goto" statement will be useful for writing more powerful
> >>> obfuscators
> >>>
> >> Let me get that clear: you want a goto to help with debugging.
> >>
> >> And you want to obfuscate your code even more?
> >>
> >> !?
> >>
> >> Perhaps you need to write in Perl, or some other similar language.
> >>
> >> Writing in Python is for those that seek clarity (not obfuscation) and
> >> less bugs.   Which is why a goto statement should definitely never be
> >> part of Python!
> >>
> >> Andr?
> >>
> >
> > so insulting to me - you asking i'm a troll, only becose i'm saing that
> > goto maybe sometimes usefull.
> 
> No, because you said that it was useful for obfuscating code.
> Obfuscating code is generally not a desirable feature of a language
> construct.
> 

I believe he meant obfuscating bytecode for a commercial product, to
try and avoid decompilation, which is often a desirable function for
commercial entities.

(Not that I have the technical knowledge to agree or disagree with
what he said, I'm just trying to help clear up what's become a fairly
bogged-down argument.)

Peace
Bill Mill
bill.mill at gmail.com

> --
> Robert Kern
> rkern at ucsd.edu
> 
> "In the fields of hell where the grass grows high
>   Are the graves of dreams allowed to die."
>    -- Richard Harter
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From thys at sentechsa.com  Tue Apr 12 18:41:16 2005
From: thys at sentechsa.com (Thys Meintjes)
Date: Wed, 13 Apr 2005 00:41:16 +0200
Subject: defining extern variables in pyrex
Message-ID: <1113345676.10043.39.camel@localhost.localdomain>

Hi All,

I've inherited a c library and is the process of wrapping it using
Pyrex. The library code is a state machine and remembers previous values
in order to determine new values on, for example, a decode() call. These
"state-full" variables were all implemented using 'extern' in the c
code. 

My wrapper works fine if I have only one instance of my new type
myclass. However, when I create more than one instance of myclass it
seems that the different instances each share the same extern variables.
And of course when one method call on a instance manipulates the
internal state machine it invalidates the other instance's state. I
guess this makes sense...

So, how do I define variables in the pyrex wrapper that is visible as
extern c values but are private to a instance ?  Take a look at the
example, both val2 and val1 are defined as extern in some .h or .c files
in the library, val2 is visible but not private to myclass, val1 is
private to myclass but when I import myclasslib I get undefined symbol
errors like these:

ImportError: ./codex/efr/src/libgsmefr.so: undefined symbol: past_gain

example:
cdef short val2
cdef class myclass:
    cdef short val1


I reckon that if I can define all the state-full vars in the same scope
as val1 and convince Pyrex (and the linker, I guess) that these are the
elusive externs I wouldn't need to go through the pain of passing these
state-full vars down each method call,

Do I have any hope of doing it this way ?

regards
Thys




From ricardo at nospam  Tue Apr 12 14:01:08 2005
From: ricardo at nospam (Ricardo)
Date: Tue, 12 Apr 2005 19:01:08 +0100
Subject: Embedding threaded Python
Message-ID: <17z9xcflpzk5z$.ao7hpt7phqfu$.dlg@40tude.net>

If I embed Python in a C app and the Python code is threaded, but the C
code isn't, do I need to call PyEval_InitThreads() ? - or do you only need
to do that if the C code is threaded ?


From ajikoe at gmail.com  Thu Apr 21 14:18:24 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 21 Apr 2005 11:18:24 -0700
Subject: __del__ and reference count problem
In-Reply-To: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>
Message-ID: <1114107504.036833.109360@z14g2000cwz.googlegroups.com>

Your problem can be simplified :

class A:
  pop = 11
  def __del__(self):
    print A.pop

if __name__ == '__main__':
  objA = A()

Exception exceptions.AttributeError: "'NoneType' object has no
attribute 'pop'" in <bound method A.__del__ of <__main__.A instance at
0x01474A08>> ignored

I got the same error message, and I don't know why ? it looks like the
class variable can't be accessed from __del__?


Pujo



From jerf at jerf.org  Wed Apr 27 17:46:20 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 27 Apr 2005 17:46:20 -0400
Subject: creating very small types
References: <mailman.2599.1114633031.1799.python-list@python.org>
Message-ID: <pan.2005.04.27.21.46.20.199466@jerf.org>

On Wed, 27 Apr 2005 22:17:07 +0200, andrea wrote:

> I was thinking to code the huffman algorithm and trying to compress
> something with it, but I've got a problem.
> How can I represent for example a char with only 3 bits??
> I had a look to the compression modules but I can't understand them much...
> 
> Thank you very much
> Any good link would be appreciated of course :)

I think the answer to this question very much depends on why you want to
do this. Easy and fast are pretty opposed in this particular domain in
Python (IMHO anyways, it's an easy bit-bashing language but it's slow
for that), and you're in one of the rare domains where it matters.

The answers strongly vary if you're trying to create something performant,
or just for your learning purposes. Or homework purposes... ;-)



From neuhauser+python-list#python.org at sigpipe.cz  Fri Apr 22 03:30:20 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Fri, 22 Apr 2005 09:30:20 +0200
Subject: Noobie Question: Using strings and paths in mkdir
	(os.mkdir("/test/"a))
In-Reply-To: <a462a352.0504212313.3bb6d361@posting.google.com>
References: <a462a352.0504212313.3bb6d361@posting.google.com>
Message-ID: <20050422073020.GA74505@isis.sigpipe.cz>

# smacpher at gmail.com / 2005-04-22 00:13:05 -0700:
> Hello!
> 
> I can't seem to get paths and variables working together:
> 
> import os
> a = 'books'
> os.chdir( '/test')
> os.mkdir("/test/"a)
> 
> the last line does not seem to work.  os.mkdir(a) makes the directory
> books, but i want this directory as a subdirectory of test.
> 
> I also tried: os.mkdir("/test/",a), and trying to make b = 'test' and
> then os.mkdir(a b).
> 
> Does someone have any ideas or a link they can give me, I looked under
> strings in the python tutorial and library manual but I guess not in
> the right spot.

    http://docs.python.org/ref/string-catenation.html

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From lee at example.com  Sun Apr 17 16:48:58 2005
From: lee at example.com (Lee Harr)
Date: Sun, 17 Apr 2005 20:48:58 GMT
Subject: pysvn install on freebsd
References: <mailman.2013.1113710547.1799.python-list@python.org>
Message-ID: <_Yz8e.1669$LX3.762@news02.roc.ny>

On 2005-04-17, Timothy Smith <timothy at open-networks.net> wrote:
> has anyone used or installed this on fbsd
> the install for it is totally redundant. i get this error for it
>
> make -f freebsd.mak clean all test
> cd ../Source && make -f pysvn_freebsd_py.mak clean
> make: cannot open pysvn_freebsd_py.mak.
> *** Error code 2
>
> Stop in /usr/home/timothy/pysvn-1.1.2/Extension/Builder.
>


Have you tried
/usr/ports/devel/subversion-python/
?


From swaroopch at gmail.com  Fri Apr  1 09:47:03 2005
From: swaroopch at gmail.com (Swaroop C H)
Date: Fri, 1 Apr 2005 20:17:03 +0530
Subject: Unzipping Files
In-Reply-To: <424D5E3E.3040506@novasyshealth.com>
References: <424D5E3E.3040506@novasyshealth.com>
Message-ID: <351e887105040106475b845943@mail.gmail.com>

On Apr 1, 2005 8:14 PM, Greg Lindstrom <greg.lindstrom at novasyshealth.com> wrote:
> How do I read the data from a file in a zip archive?

http://www.devshed.com/c/a/Python/Python-UnZipped

Regards,
-- 
Swaroop C H
Blog: http://www.swaroopch.info
Book: http://www.byteofpython.info


From pinard at iro.umontreal.ca  Wed Apr  6 09:59:20 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Wed, 6 Apr 2005 09:59:20 -0400
Subject: Best editor?
In-Reply-To: <u3bu4sdzu.fsf@smtp.mahalosoft.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<u3bu4sdzu.fsf@smtp.mahalosoft.com>
Message-ID: <20050406135920.GB23620@alcyon.progiciels-bpi.ca>

[Mike L.G.]

> Emacs may seem awkward at first, but the payoff was amazing for me.

Same here.  A good editor may tremendously increase your productivity.
However, nowadays, good editors abound, to the point that people are
not so astonished by them.  I've been around for many years, and a
good while ago, people were not stumbling on good editors as they do
nowadays.  At that time, something like Emacs was quite a breakthrough.

I guess that Python is extraordinary wonderful, or not that much,
depending on your background.  Younger people are exposed to many good
languages, so they all seem more natural to them.  If I compare Python
to FORTRAN, COBOL or Assembler, the change is impressive.  If I only
could have had something like Python when I started, years ago, and
considering all the work invested, where would I be today! :-)

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From __peter__ at web.de  Wed Apr  6 14:06:16 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 06 Apr 2005 20:06:16 +0200
Subject: formatting file
References: <mailman.1428.1112793749.1799.python-list@python.org>
Message-ID: <d318ek$567$01$1@news.t-online.com>

SPJ wrote:

> test1????1.1-1???installed
> test1????1.1-1???update
> test2????2.1-1???installed
> test2????2.1-2???update
> 
> I want the file to be formatted in the following way:
> 
> test1????1.1-1???1.1-2
> test2????2.1-1???2.1-2

The following program expects a sorted input file:

import itertools
from operator import itemgetter

def pivot(infile, outfile, 
          getkey=itemgetter(0), getvalue=itemgetter(1), sep="\t"):
    if not hasattr(infile, "read"):
        infile = file(infile)
    if not hasattr(outfile, "write"):
        outfile = file(outfile, "w")

    records = (line.split() for line in infile)
    for key, items in itertools.groupby(records, getkey):
        out_record = [key]
        out_record.extend(getvalue(item) for item in items)
        print >> outfile, sep.join(out_record)

if __name__ == "__main__":
    import sys
    infile, outfile = sys.argv[1:]
    if infile == "-": infile = sys.stdin
    if outfile == "-": outfile = sys.stdout
    pivot(infile, outfile)



From jstroud at mbi.ucla.edu  Sat Apr 23 22:30:12 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 23 Apr 2005 19:30:12 -0700
Subject: Variables
In-Reply-To: <426B0283.40602@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com>
Message-ID: <200504231930.12851.jstroud@mbi.ucla.edu>

I think, strictly speaking, foo would be a "name" in python.

>>> foo
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'foo' is not defined



On Saturday 23 April 2005 07:20 pm, so sayeth Richard Blackwood:
> To All:
>
>     Folks, I need your help. I have a friend who claims that if I write:
>
> foo = 5
>
> then foo is NOT a variable, necessarily. If you guys can define for me
> what a variable is and what qualifications you have to back you, I can
> pass this along to, hopefully, convince him that foo is indeed a variable.
>
> Thanks all!
>
> Richard B.

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

http://www.jamesstroud.com/


From __peter__ at web.de  Tue Apr 26 18:19:42 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 27 Apr 2005 00:19:42 +0200
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
	<8d7dabda.0504261239.37952804@posting.google.com>
Message-ID: <d4mep6$u11$05$1@news.t-online.com>

dumbkiwi wrote:

> I'd be interested to see what your default encoding is, 

ascii

> and why your output was different.

If only I knew.
 
> Anyway, from your post, I've done some more digging, and found the
> command:
> 
> sys.setappdefaultencoding()

That is an alias for sys.setdefaultencoding() created by your IDE (Eric),
and therefore may not always be available.

Peter



From fperez.net at gmail.com  Tue Apr  5 03:37:59 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Tue, 05 Apr 2005 01:37:59 -0600
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
Message-ID: <d2tf61$1nj$1@sea.gmane.org>

syd wrote:

> I don't even know where to begin.  This is just bizarre.  I just picked
> up the Gnuplot.py module (a light interface to gnuplot commands) and
> was messing around with it today.
> 
> I've got a tiny script, but it only works from the command line about
> half the time!  In the python interpreter, 100%.   Ipython, 100%.  I'm
> not kidding.

Nothing strange about it.  When run standalone, the python interpreter quits and
cleans up after itself, possibly deleting temp files before gnuplot gets a
chance to use them.  You can put a time.sleep(5) before exiting, or even safer,
a full safety check:

while 1:
  if os.path.isfile(your_plot_filename):
    break
  time.sleeep(1)

Best,

f



From remi at cherrypy.org  Thu Apr 28 07:11:02 2005
From: remi at cherrypy.org (remi at cherrypy.org)
Date: 28 Apr 2005 04:11:02 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
	<1114587592.260950.181990@l41g2000cwc.googlegroups.com>
	<1114587846.011299.125420@g14g2000cwa.googlegroups.com>
	<1114663336.926935.97910@f14g2000cwb.googlegroups.com>
	<1114665613.879362.75100@l41g2000cwc.googlegroups.com>
Message-ID: <1114686654.011511.306570@l41g2000cwc.googlegroups.com>

> CherryPy and Quixote are for programming in the small

May I ask why you say that ?
Just because a framework is light and easy doesn't mean it doesn't
scale well ...

> I have not idea how they scale in the large.

Well, I do :-)
Among many other sites, CherryPy powers the BackOffice system of a big
cinema chain in the UK. The web app gets hammered all day long by
hundreds of users whose work is completely dependent on this web app.
It has 500 different web forms (everything is data driven) and the code
is about 30K lines of python/cherrypy code (if the code wasn't
data-driven it would be a *lot* more ...).

If it gets accepted, there will be a talk about this system at
EuroPython ...

Remi.



From auch-ich-m at g-kein-spam.com  Tue Apr  5 02:42:16 2005
From: auch-ich-m at g-kein-spam.com (=?ISO-8859-1?Q?Andr=E9?= Malo)
Date: Tue, 5 Apr 2005 08:42:16 +0200
Subject: re module non-greedy matches broken
References: <mailman.1308.1112637220.1799.python-list@python.org>
	<1153658nrs82j13@corp.supernews.com>
Message-ID: <d2tc04$84s$1@news.web.de>

* "lothar" <lothar at ultimathule.nul> wrote:

> no - in the non-greedy regex
>   <1st-pat><not-1st-pat>*?<follow-pat>
> 
> <1st-pat>, <not-1st-pat> and <follow-pat> are arbitrarily complex patterns.

The "not" is the problem. Regex patterns are expressed positive by
definition (meaning, you can say, what you expect, but not what you
don't expect). In other words, regexps were invented to define (uh... regular)
sets, nothing more (especially you can't define "non-sets"). So the usual
way is to define the set you've called '<not-1st-pat>*?' and describe
it as regex. Modern regular expression engines (which are no longer regular
by the way ;-) allow shortcuts like negative lookahead assertions and the
like.

I want to make clear, that it isn't, that nobody _wants_ to give an advice
how to express your pattern in general. The point is, that there's no
real syntax for it. It depends on how your <1st-pat> and <follow-pat> look
like. Chances are, that's even not expressable in one regex (depends on
the complexity and kind of the set they define).
Each pattern you write is special to the particular use case.

Said that, there are some common patterns on how to write some specific
forms of regexes. I also suggest Friedl's book. Look for the
C-comment-example, where your problem (more or less) is discussed
execessively. Though I really recommend to read the book from start
to end. It's more like a story, but a good one ;-)

> with character classes and negative character classes you do not need
> non-greediness anyway.

AFAICS one needs non-greedy regexps very very rarely at all. I'm playing
with regular expressions for about ten years now and I've actually used
them, say, two or three times -- and only for quick hacks. I've never
actually _needed_ them.

nd


From rdm at rcblue.com  Fri Apr 15 13:16:49 2005
From: rdm at rcblue.com (Dick Moores)
Date: Fri, 15 Apr 2005 10:16:49 -0700
Subject: Compute pi to base 12 using Python?
Message-ID: <6.2.1.2.2.20050415101522.06d3b560@rcblue.com>

M.E.Farmer wrote at 23:18 4/14/2005:
>Nice collection of unix tools, Cygwin not needed.
>http://unxutils.sourceforge.net/

Thank you!

But a question. I've download both UnxUtils.zip and UnxUpdates.zip. I'm 
planning to put the contents of UnxUtils.zip in a directory and then move 
the contents of UnxUpdates.zip, which has many of the same filenames, to 
the same directory. Should I just let Windows replace the old files with 
the updated ones?

This seems obvious, but I wanted to make sure.

I'm using Win XP Pro.


Thanks,

Dick Moores





From mahs at telcopartners.com  Sun Apr  3 16:25:53 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 03 Apr 2005 13:25:53 -0700
Subject: "specialdict" module
In-Reply-To: <3bamhhF6j009lU1@individual.net>
References: <3bamhhF6j009lU1@individual.net>
Message-ID: <d2pjfj$asb$1@sea.gmane.org>

Georg Brandl wrote:
> Hello,
> 
> in follow-up to the recent "dictionary accumulator" thread, I wrote a
> little module with several subclassed dicts.
> 
> Comments (e.g. makes it sense to use super), corrections, etc.? Is this
> PEP material?
> 
> Docstrings, Documentation and test cases are to be provided later.
> 
> mfg
> Georg
> 

Georg:

A few reactions:

1. Given that these are specializations, why not have:

class defaultvaluedict(dict):
     ...

class defaultfactorydict(dict):
     ...

rather than having to jump through hoops to make one implementation satisfy both 
cases

2. I would really prefer to have the default value specified in the constructor

I realize that this is tricky due to the kw arguments of dict.__init__, but I 
would favor either breaking compatibility with that interface, or adopting some 
workaround to make something like d= defaultvaluedict(__default__ = 0) possible.

One worksaround would be to store the default in the dict, not as an attribute 
of the dict.  By default the default value would be associated with the key 
"__default__", but that keyname could be changed for the (I guess very few) 
cases where that key conflicted with non-default content of the dict.  Then 
dict.__init__ would simply take __default__ = value as a keyword argument, as it 
does today, and __getitem__ for a missing key would return 
dict.__getitem__(self, "__default__")

Alternatively, you could provide factory functions to construct the defaultdict. 
  Someone (Michele?) recently posted an implementation of this

3. Can you work in the tally and listappend methods that started this whole 
thread off?

4. On super, no I don't think it's necessary or particularly desirable.  These 
specializations have a close association with dict.  dict.method(self,...) feels 
more appropriate in this case.

Michael




From sjmachin at lexicon.net  Fri Apr 22 16:57:00 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 23 Apr 2005 06:57:00 +1000
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
Message-ID: <7loi61dq62m6gjutqoj52lgkaf2j4qm0g0@4ax.com>

On 22 Apr 2005 12:22:41 -0700, "fuzzylollipop"
<jarrod.roberson at gmail.com> wrote:

>try spelling license correctly next time

Yup, pesky furriners, can't spell 'Merican prop'ly like God intended;
they shouldn't be allowed on the net, sheriff should run 'em right out
o' the county ...

> and heading

Would that be like heading a soccer ball?

>the google
>suggestions that probably looked like "didn't you mean : Python License"

You might find, were you to try it, that it makes no such suggestions.




From radam2 at tampabay.rr.com  Fri Apr 29 12:12:13 2005
From: radam2 at tampabay.rr.com (Ron Adam)
Date: Fri, 29 Apr 2005 16:12:13 GMT
Subject: Can'r run BLT twice?
In-Reply-To: <1114717764.808143.317510@o13g2000cwo.googlegroups.com>
References: <1114717764.808143.317510@o13g2000cwo.googlegroups.com>
Message-ID: <x1tce.31439$5f.212@tornado.tampabay.rr.com>

Todd Krein wrote:
> I'm running PythonWin on XP. When I run my plotter program the first
> time, it works fine. The second time I run it, I get the following
> error. If I exit PythonWin, and restart, I can again run it once. Any
> ideas?
> 
> Error: 1
> TclError Exception in Tk callback
>   Function: <bound method PathEval.doOpenTrace of <__main__.PathEval
> instance at 0x0127AC60>> (type: <type 'instancemethod'>)
>   Args: ()
> Traceback (innermost last):
>   File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBase.py", line 1747, in
> __call__
>     None
>   File
> "C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
> line 89, in doOpenTrace
>     self.doPlotTrace()                          # go plot the thing
>   File
> "C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
> line 117, in doPlotTrace
>     self.graph = Pmw.Blt.Graph(tkRoot)                   # make a new
> graph area
>   File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBlt.py", line 260, in
> __init__
>     None
>   File "C:\Python24\lib\lib-tk\Tkinter.py", line 1861, in __init__
>     self.tk.call(
> TclError: invalid command name "::blt::graph"
> 

I had that problem also at one time, but I can't remember just what I 
did to solve it. :-(

It is fixable though.  I know that's not much help. I'll look at how I 
use it in my program and see if that rings any bells.

Ron Adam


From tjreedy at udel.edu  Fri Apr  8 16:54:51 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 8 Apr 2005 16:54:51 -0400
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu> <slrnd5dbs1.f3b.axel@m2.sine>
	<d36bpj$s59$1@vegh.ks.cc.utah.edu>
Message-ID: <d36qu4$5fo$1@sea.gmane.org>


"Matthew Thorley" <ruach at chpc.utah.edu> wrote in message 
news:d36bpj$s59$1 at vegh.ks.cc.utah.edu...
> I must say I am *very* suprised that python does not have a way to look
> up what key is pointing to a given object

But it does.  Of course, there could be zero to many keys in any dictionary 
pointing to any particular value object

>--without scanning the whole list that is.

That's one way.  Another is a reverse dict (for hashable values turned into 
keys) with the value being a list of zero to many keys.  A third (and 
fastest of these) is to keep the key with the value.

>Is that what list.index() does under-the-hood? I mean is
> list.index(y) just the same as
>
> itemnum = 0
> for item in list:
> if y == item:
> return itemnum
> else:
> itemnum = itemnum+1

More or less, yes.  If  your list is sorted, you can use binary search in 
the bisect module.

Terry J. Reedy





From ojokimu at yahoo.co.uk  Mon Apr  4 14:54:53 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Mon, 4 Apr 2005 19:54:53 +0100 (BST)
Subject: help with python-devel!!!
Message-ID: <20050404185454.93863.qmail@web26806.mail.ukl.yahoo.com>

* Michele Simionato wrote:
> Just give (as root)
>
> # urpmi python-devel

The OP mentioned that urpmi couldn't find a package by that name. So it
might be worth querying for "libpython" if that fails:

[user at home]$ urpmq libpython
The following packages contain libpython:
libpython2.3
libpython2.3-devel


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From michele.simionato at gmail.com  Tue Apr 12 12:36:26 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Apr 2005 09:36:26 -0700
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
In-Reply-To: <3bv5mgF6jbil9U1@individual.net>
References: <3bv5mgF6jbil9U1@individual.net>
Message-ID: <1113323786.737140.184800@o13g2000cwo.googlegroups.com>

Me too :-(
I have already submitted my issues with the Italian keyboard
on WinXP with no great success. It works on Linux, but this
is not of a big help since my plan was to use ipython -p pysh on
Windows as a replacement of the shell :-(

          Michele Simionato



From ville at spammers.com  Mon Apr 25 16:33:48 2005
From: ville at spammers.com (Ville Vainio)
Date: 25 Apr 2005 23:33:48 +0300
Subject: What's do list comprehensions do that generator
	expressions	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
Message-ID: <du7wtqq8ukz.fsf@mozart.cc.tut.fi>

>>>>> "Jeremy" == Jeremy Bowers <jerf at jerf.org> writes:

    Jeremy> On Sun, 24 Apr 2005 22:59:12 -0700, Robert Kern wrote:
    >> Never. If you really need a list
    >> 
    >> list(x*x for x in xrange(10))
    >> 
    >> Sadly, we can't remove list comprehensions until 3.0.

    Jeremy> Why "remove" them? Instead, we have these things called
    Jeremy> "comprehensions" (which, now that I say that, seems a
    Jeremy> rather odd name), and you can control whether they result
    Jeremy> in a list or a generator with () or [].

Still, list comprehensions should be implemented in terms of genexps
to get rid of the LC variable that is visible outside the scope of the
LC.

    Jeremy> should be relatively simple), it's not worth breaking that
    Jeremy> code.

Well, the code that relies on the dangling variable deserves to break.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From andrea.gavana at agip.it  Mon Apr 11 04:59:05 2005
From: andrea.gavana at agip.it (andrea.gavana at agip.it)
Date: Mon, 11 Apr 2005 10:59:05 +0200
Subject: Avoiding DOS Window...
Message-ID: <OF2642FFF8.9D188F7B-ONC1256FE0.003082E3-C1256FE0.00315B14@eni.pri>

Hello NG,

      I don't know if this is the right place to post this question, but
noting that it is os-related probably someone will have some nice idea.
I have built an application using Python+wxPython, and I have compiled it
into an exe file using py2exe. In my app, I use a call:

self.process = os.spawnl(os.P_NOWAIT, MyCommand)

where MyCommand is a call to an external exe file. When I run my
application (without the DOS window), a new DOS window is created for every
call to os.spawnl. This is something I would like to avoid because I don't
need to have 50 DOS windows opened on my PC. Moreover, I need to keep a
reference to self.process, because I woule like to be able to kill the
process when the user decides to kill it. In order to kill it, I use a
command like:

if self.process is not None:
    if wx.Platform == '__WXGTK__':
        try:
            status = os.kill(self.process, 9)
        except:
            pass
    else:
        try:
            win32api.TerminateProcess(self.process,0)
        except:
            pass
        status = 0

self.process = None

I thought I could use os.popen* things, but it seems to me that they do not
return something that could be killed using os.kill() or
win32api.TerminateProcess().
Am I missing something about the os things? Does anyone have a better
solution?

Thanks to you all.

Andrea.


------------------------------------------------------------------------------------------------------------------------------------------
 Message for the recipient only, if received in error, please notify the
sender and read http://www.eni.it/disclaimer/




From peter at engcorp.com  Thu Apr 14 09:57:49 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 14 Apr 2005 09:57:49 -0400
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <3c670tF6jdeqrU1@individual.net>
References: <d3ekhf$a0f$1@lairds.us> <3c670tF6jdeqrU1@individual.net>
Message-ID: <lMKdnShsStt_68PfRVn-3g@powergate.ca>

Greg Ewing wrote:
> (Darn. I finally say something that gets into Quote of the
> Week, and it's attributed to someone else! :-) :-) :-)

+1 on this for meta-QOTW, solving both problems...


From steven.bethard at gmail.com  Tue Apr  5 15:35:03 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 05 Apr 2005 13:35:03 -0600
Subject: Propagating poorly chosen idioms
In-Reply-To: <mailman.1398.1112721652.1799.python-list@python.org>
References: <mailman.1398.1112721652.1799.python-list@python.org>
Message-ID: <A9idnWvue9X4dc_fRVn-vA@comcast.com>

Skip Montanaro wrote:
> Unittest's API is difficult enough for me to remember (at least the initial
> framework I need to put together) that I generally hunt down some previous
> unittest usage, clone it and start from there.  I no longer have any idea
> what the original unittest example was that got me started using it in the
> first place (probably something in the distro's docs).  I can only hope it
> was a good example.

That's a really good point.  I do the exact same thing.  It's not like 
Unittest is all that complicated, but it's just complicated enough that 
I can't remember all the details when I want to write a new one...  I've 
been putting off looking into py.test for a while, but maybe I need to 
finally do so...

STeVe


From jarrod.roberson at gmail.com  Fri Apr 15 16:26:25 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 15 Apr 2005 13:26:25 -0700
Subject: How to fix this error in the example in 6.1.4 Files and
	Directories
In-Reply-To: <mailman.1979.1113584946.1799.python-list@python.org>
References: <1113583932.703797.118610@o13g2000cwo.googlegroups.com>
	<mailman.1979.1113584946.1799.python-list@python.org>
Message-ID: <1113596785.783631.45380@g14g2000cwa.googlegroups.com>

I am running 2.3.5



From martin at v.loewis.de  Thu Apr 21 01:34:09 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 21 Apr 2005 07:34:09 +0200
Subject: Array of Chars to String
In-Reply-To: <mailman.2133.1113942800.1799.python-list@python.org>
References: <mailman.2133.1113942800.1799.python-list@python.org>
Message-ID: <42673B51.4040804@v.loewis.de>

James Stroud wrote:
> astr = "Bob Carol Ted Alice"
> letters = "adB"

Apparently nobody has proposed this yet:

>>> filter(letters.__contains__, astr)
'Bad'
>>> filter(set(letters).__contains__, astr)
'Bad'

Regards,
Martin


From srm at netverk.com.ar  Mon Apr 25 14:09:43 2005
From: srm at netverk.com.ar (Gonzalo)
Date: 25 Apr 2005 11:09:43 -0700
Subject: C++ app. with python scripting IDE ?
Message-ID: <1114452583.238627.62000@z14g2000cwz.googlegroups.com>

Hi everyone!
I want to develop a C++ application, which must be scriptable (I'm
considering to use Python or Lua). The end users should develop and run
their scripts in an IDE, and the scripting language must be extended
with specific functions related to my application. The IDE should have
debugging capabilities (step by step execution, breakpoints, watching
variables, etc. )

What would be the best option in order to develop this using Python as
the scripting language (scheme, configuration, IDE, free/commercial
tools, etc)?

What language is more suitable for this project, Python or Lua?

Thanks in advance.



From peter at engcorp.com  Thu Apr 14 13:35:39 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 14 Apr 2005 13:35:39 -0400
Subject: smtplib does not send to all recipients
In-Reply-To: <1113487680.752215.194840@l41g2000cwc.googlegroups.com>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>
	<mailman.1715.1113251652.1799.python-list@python.org>
	<1113421803.445281.3660@l41g2000cwc.googlegroups.com>
	<mailman.1859.1113430962.1799.python-list@python.org>
	<1113487680.752215.194840@l41g2000cwc.googlegroups.com>
Message-ID: <9Y-dndpOXf1sNMPfRVn-sA@powergate.ca>

dccarson at gmail.com wrote:
> OK, I've discovered the lost messages, but I'm still slightly confused
> as to why they ended up there.  The messages were being delivered to
> the local machine, box1.domain.com, even though I was addressing them
> to <user>@domain.com.

The address is irrelevant with SMTP.  What matters is
what server you connect to, and how it is configured
to handle the envelope you give it.

Mail forwarders ought to query a DNS for the "MX"
record (on Linux, "dig domain.com mx" for that info)
and forward the mail to one of the specified mail
exchangers for that domain, regardless of what
server you actually connected to for the initial
delivery.

Not sure this is relevant in your case, but it seems
a likely candidate, since smtplib.py does not (and
should not) be looking up MX records for you, as far
as I know, while the "mail" utility might.

-Peter


From me at privacy.net  Thu Apr 14 22:31:39 2005
From: me at privacy.net (Unknown User)
Date: Thu, 14 Apr 2005 23:31:39 -0300
Subject: Is Python appropriate for web applications?
Message-ID: <op.so85a1bgr3xrds@sony>

I am a Python programmer and I'm thinking about learning PHP, which is  
similar to C++ (quite
different from Python). I want to start writing web applications. Do you  
think if I learn
PHP I'll develop faster? Does PHP have more features? How about the speed  
of execution? What
are the pros and cons? Our server can run both Python, Perl and PHP, so I  
have the choice.
Thanks for your opinion,

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


From corey.coughlin at comcast.net  Wed Apr 13 18:17:43 2005
From: corey.coughlin at comcast.net (corey.coughlin at comcast.net)
Date: 13 Apr 2005 15:17:43 -0700
Subject: build flow? SCons? AAP? process creation?
In-Reply-To: <425d7a08$1@news.uni-ulm.de>
References: <1113420994.118316.245190@g14g2000cwa.googlegroups.com>
	<425d7a08$1@news.uni-ulm.de>
Message-ID: <1113430663.410239.101560@f14g2000cwb.googlegroups.com>

good point, I hadn't checked the docs too closely.  Shame it's only in
2.4 though, we're still running 2.2 around here, but it would be nice
to have a reason to upgrade, anyway.  Thanks for the pointer!



From apardon at forel.vub.ac.be  Thu Apr 21 07:20:35 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 11:20:35 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
	<mailman.2204.1114033804.1799.python-list@python.org>
	<slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>
	<3cpc8oF6n6g9bU1@individual.net>
	<slrnd6f0bu.ge8.apardon@rcpc42.vub.ac.be>
	<3cpeu5F64gp32U1@individual.net>
Message-ID: <slrnd6f341.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-21, Reinhold Birkenfeld schreef <reinhold-birkenfeld-nospam at wolke7.net>:
> Antoon Pardon wrote:
>> Op 2005-04-21, Reinhold Birkenfeld schreef <reinhold-birkenfeld-nospam at wolke7.net>:
>>> Antoon Pardon wrote:
>>>
>>>> I sometimes think python should have been more explicite here,
>>>> using a marker for the start-index and end-index, may '^' and
>>>> '$'. So if you wanted the last element you had to write:
>>>> 
>>>>   lst[$]
>>>> 
>>>> And for the next to last element:
>>>> 
>>>>   lst[$ - 1]
>>>> 
>>>> 
>>>> This would make accessing list elements counted from the rear
>>>> almost just as easy as it is now but wouldn't interfere with
>>>> the ask forgiveness programming style.
>>>
>>> How would you pass this argument to __getitem__?
>> 
>> Well assuming lst.last, was the last index of lst, __getitem__
>> would get lst.last and lst.last - 1 passed.
>
> Then it would be an alias for len(lst)-1 ?

In the context of current python lists yes. But if you would
go further and allow lists to start from an other index than
0 then not.

>>> What would be allowed, only '$-x' or also '$+x' or what else?
>> 
>> Any expression where an int is allowed.
>
> Okay.
>
>>> What type would '$' be?
>> 
>> It would be an int.
>
> Where would it be allowed? Only in subscriptions?

Yes, the idea would be that the brackets indicate a
scope where $ would be the last index and ^ would
be the first index. So if you wanted the middle
element you could do: lst[(^ + $) // 2]

But outsides the brackets the scope where this
has any meaning wouldn't be present.

Not that I think this idea has any chance. Already
I can hear people shout that this is too perlish.


But here is another idea.

Sometime ago I read about the possibility of python
acquiring a with statement. So that instead of having
to write:

  obj.inst1 ...
  obj.inst2 ...
  obj.inst1 ...

You could write:

  with obj:
    .inst1 ...
    .inst2 ...
    .inst1 ...


If this would get implemented we could think of a left bracked
as implicitely exucting a with statement.  If we then had a list
like class where the start-index could be different from zero and
which had properties first and last indicating the first and last
index we could then write something like:

  lst[.last]                  for the last element or
  lst[.last - 1]              for the next to last element.
  lst[.first]                 for the first element
  lst[(.first + .last) // 2]  for the middle element

Maybe this makes the proposal again pythonic enough to get
a little consideration.

-- 
Antoon Pardon


From ivoras at _-_fer.hr  Sun Apr 24 19:25:59 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Mon, 25 Apr 2005 01:25:59 +0200
Subject: HTML cleaner?
Message-ID: <d4h9uv$cge$1@bagan.srce.hr>

Is there a HTML clean/tidy library or module written in pure python? I 
found mxTidy, but it's a interface to command-line tool.

What I'm searching is something that will accept a list of allowed tags 
and/or attributes and strip the rest from HTML string.



From steve at holdenweb.com  Tue Apr 26 08:37:50 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 08:37:50 -0400
Subject: how to pass an array to a VB array via COM
In-Reply-To: <1114515084.138728.26180@g14g2000cwa.googlegroups.com>
References: <1114515084.138728.26180@g14g2000cwa.googlegroups.com>
Message-ID: <d4lccu$hsg$2@sea.gmane.org>

jelle wrote:
> Hi,
> 
> I'm trying to script Rhino -the nurbs modeller, not the server soft-
> via COM.
> Which is good fun, except i cant seem to pass arrays to the program.
> I suppose its expecting VB arrays, and is not to keen when i send a
> tuple:
> 
> RS.AddCurve(((1,2,3),(4,5,6),(7,8,9)),3)
> ---
> Traceback (most recent call last):
>   File "<input> ", line 1, in ?
>   File "c:\Python23\lib\site-packages\jf\interface\RhinoScript.py",
> line 48,
> in AddCurve
>     return self._ApplyTypes_(77, 1, (12, 0), ((12, 0), (12, 16)),
> 'AddCurve', None,vaPoints, vaDegree)
>   File "c:\Python23\lib\site-packages\win32com\client\__init__.py",
> line
> 446, in _ApplyTypes_
>     return self._get_good_object_(
> com_error: (-2147352567, 'Exception occurred.', (6, 'RhinoScript_m',
> 'Type
> mismatch in parameter.  One-dimensional array required.', 'C:\\Program
> Files\\Rhinoceros 3.0\\RhinoScript_m.HLP', 393222, 0), None)
> ---
> 
> This is somewhat puzzling, since when i define points in the
> application, these are returned as a tuple of tuples:
> 
> 
> 
>>>>s = RS.GetPoints()
>>>>print s
> 
> ((-7.0, -30.0, 0.0), (15.0, -24.0, 0.0), (-7.0, 12.0, 0.0), (14.0,
> 29.0,
> 0.0), (28.0, 10.0, 0.0), (20.0, 1.0, 0.0))
> 
> I've been searching this list for a solution, but didnt find anything i
> could use. Any ideas?
> 
Have you tried wrapping them? One of the win32all modules lets you wrap 
a Python object so it can be accessed by COM interfaces. Not sure 
whether this will help, but it's a possibility.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From kretino at net.hr  Thu Apr 21 03:50:49 2005
From: kretino at net.hr (jozo)
Date: 21 Apr 2005 00:50:49 -0700
Subject: Lex
References: <bf594e7.0504200216.303729d0@posting.google.com>
Message-ID: <bf594e7.0504202350.7c380776@posting.google.com>

I NEED HELP!!!


From tim.golden at viacom-outdoor.co.uk  Fri Apr 15 10:24:06 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Fri, 15 Apr 2005 15:24:06 +0100
Subject: Get OS name
Message-ID: <9A28C052FF32734DACB0A288A3533991EBB778@vogbs009.gb.vo.local>

[codecraig]
| where can I get wmi module, it doesnt come with Python right?
| 

Sorry, should have said.

http://timgolden.me.uk/python/wmi.html


TJG

________________________________________________________________________
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From jfj at freemail.gr  Fri Apr  1 19:26:43 2005
From: jfj at freemail.gr (jfj)
Date: Fri, 01 Apr 2005 16:26:43 -0800
Subject: StopIteration in the if clause of a generator expression
In-Reply-To: <d2j6au$k1o$04$1@news.t-online.com>
References: <d2j6au$k1o$04$1@news.t-online.com>
Message-ID: <424DE6C3.9020305@freemail.gr>

Peter Otten wrote:
> To confuse a newbies and old hands alike, Bengt Richter wrote:

got me for one:)


> 
> To make it a bit clearer, a StopIteration raised in a generator expression
> silently terminates that generator:

*any* exception raised from a generator, terminates the generator


jfj


From tjreedy at udel.edu  Sun Apr 24 01:44:49 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 24 Apr 2005 01:44:49 -0400
Subject: Variables
References: <426B0283.40602@cloudthunder.com><d4f0op$kp$1@sea.gmane.org>	<426B083A.70104@cloudthunder.com><d4f6hi$aq0$1@sea.gmane.org>
	<426B22CD.60208@cloudthunder.com>
Message-ID: <d4fbfb$igo$1@sea.gmane.org>

>>In mathematics, the word 'variable' is generally an undefined meta-term 
>>that is *notorious* for having multiple possible meanings and shades of 
>>meaning.  One mathematician/linguist once claimed to have discerned 
>>somewhere around 15 different meanings and shades thereof. <SNIP>
>>
> What is his/her name?

Wish I could remember but this was some decades ago.  But you should be 
able to think a few yourself.

Terry J. Reedy





From ville at spammers.com  Fri Apr 22 10:14:17 2005
From: ville at spammers.com (Ville Vainio)
Date: 22 Apr 2005 17:14:17 +0300
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
Message-ID: <du7k6muhpae.fsf@amadeus.cc.tut.fi>

>>>>> "Ilpo" == Ilpo Nyyss?nen <iny> writes:

    Ilpo> Of course it caches those when running. The point is that it
    Ilpo> needs to recompile every time you have restarted the
    Ilpo> program. With short lived command line programs this really
    Ilpo> can be a problem.

I didn't imagine it could be longer than 1 second overhead - and if
you have so many regexps, it must do something so nontrivial that 1
second doesn't matter. Perhaps I have a different mindset about this
:-).

    Ilpo> And yes, I have read the source of sre.py and I have made an
    Ilpo> ugly module that digs the compiled data and pickles it to a
    Ilpo> file and then in next startup it reads that file and puts
    Ilpo> the stuff back to the cache.

What's so ugly about it? The fact that you need to rewrite the cache
when you change some of the regexps? I can't imagine you change more
than, say, 10 of the regexps a day (compiling of which is an
insignificant performance hit) and when you "ship" the script, you
will freeze the regexps anyway.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From skip at pobox.com  Tue Apr  5 13:20:47 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 5 Apr 2005 12:20:47 -0500
Subject: Propagating poorly chosen idioms
Message-ID: <16978.51439.878409.497671@montanaro.dyndns.org>


    Peter> unitttest is surely not the be all and end all of Python unit
    Peter> testing frameworks...  but it's one of the batteries included in
    Peter> the standard distribution, and it's pretty trivial to get started
    Peter> using it, unless maybe you try to go by the documentation instead
    Peter> of by the examples...

This reminded me of something I noticed awhile ago.  If you're learning
something new, there is a tendency to find a working example to start from,
then modify it to suit your needs.  This is fine as far as it goes, however,
if the idioms used in the code you're cloning are suboptimal, they get
cloned.

Unittest's API is difficult enough for me to remember (at least the initial
framework I need to put together) that I generally hunt down some previous
unittest usage, clone it and start from there.  I no longer have any idea
what the original unittest example was that got me started using it in the
first place (probably something in the distro's docs).  I can only hope it
was a good example.

>From that standpoint the simpler API of py.test seems attractive.

Skip


From rkern at ucsd.edu  Sat Apr 16 23:17:54 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 16 Apr 2005 20:17:54 -0700
Subject: new to mac OS10
In-Reply-To: <4261C311.8070502@acm.org>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>	<d3ojjf$n11$1@geraldo.cc.utexas.edu>
	<4261C311.8070502@acm.org>
Message-ID: <d3sk9v$bmg$1@sea.gmane.org>

Maurice LING wrote:
> Hi Thomas,
> 
> It seems that you've cleanly killed the Apple-installed Python, which 
> isn't too bad a thing after all. What I can suggest you do is this... 
> Copy the entire /System/Library/Frameworks/Python.framework directory 
> from someone and drop it into your system (same place of course). I will 
> not suggest installing Python 2.4.1 until the Apple-installed Python is 
> sorted out. My reasons being,
> 
> 1. I have no idea what Mac OSX uses Python for. Although symlink may get 
> you through most of the time but I cannot be sure that none of OSX's 
> stuffs are hardcoded to use the Python in 
> /System/Library/Frameworks/Python.framework.

I believe Apple only uses it for their fax utilities. There's also the 
CoreGraphics wrapper (which the fax stuff uses), but that's pretty 
useless as it is.

> 2. Installing another Python may or may not be a precise remedy. It may 
> just worsen things and I won't want to bet on that.

The 2.4.1 build by Bob Ippolito is designed to work alongside the 
system-installed Python. It certainly won't replace it, but it shouldn't 
worsen anything.

> 3. Apple-installed Python's command line tools are symlinked from 
> /usr/bin to /System/Library/Frameworks/Python.framework but the OSX 
> installer for Python 2.4.1 places the commandline tools in 
> /usr/local/bin and symlinked to /Library/Frameworks/Python.framework. So 
> it seems to me that Python 2.4.1 (installed using OSX installer for 
> Python 2.4.1) is not a precise replacement of Apple-installed Python...

Bingo. It's not intended to be one.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From michele.simionato at gmail.com  Tue Apr 12 08:51:09 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Apr 2005 05:51:09 -0700
Subject: singleton objects with decorators
In-Reply-To: <d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1113310269.596284.136100@f14g2000cwb.googlegroups.com>

Uwe Mayer wrote:
> "Singleton" is simple (like the wheel), but that does not make it
stupid.
> There are two aspects that are important:
>
> 1. a Singleton has one, very simple property and virtually everyone
knows
> what you talk about when you explain that you used a "Singleton". In
this
> case its just a technical term. We need technical terms.

No. Not everybody knows about Singleton. It is an acquired knowledge.
The reason why I am so opposed to Singletons is that a while ago I was
in the condition of not knowing what a Singleton was. However,
everybody
was talking about Singletons, posting recipes of how to implement them
in
Python, etc. So I figured out it was a very important concept and that
I was missing something, since I was incapable of understand its
relevance.
It was only after many months that I understood that there was really
nothing
more to it. I am the kind of person that can learn easily even very
hard
concept, if I can see and use/interest for them. However, I find
extremely
difficult to learn even simple concepts if they do not make sense for
me.
Singleton did not make sense for me since I did not have an use case
for
it. Now, I have some use case for it, but still I think these use cases
are much better managed by memoize. BTW, when I first heard about
memoize,
I understood it instantenously, since I had tons of cases where I had
implemented it in my own code without knowing the technique was called
memoize.

There is so much to know. I don't want to waste my time with concepts
that
are not worth it. IMO, Singleton is not worth the fuss, and we would
be better off without a fancy name for it (just tell what it is: a
class returning always the same instance). Let us reserve fancy names
to
worthy concepts.

In my lectures at Oxford next week I have carefully expunged anything
referring to Singletons ;)

> 2. the property of a Singleton, i.e. there is only one, is important
- you
> use it yourself through memoize. That is just a more flexible
> implementation of having one instance of whatever you memoize.

IMNSHO, the property "there is only one" is not important enough to
deserves
a name. The property "if you have already called this callable with the
same arguments you don't need to recompute it" instead is quite worthy
and subsumes the other concept as a special case. It also gives you
plenty of use case to illustrate it, even to beginner programmers.


             Michele Simionato



From bokr at oz.net  Sat Apr 16 11:24:49 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 16 Apr 2005 15:24:49 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
Message-ID: <4260bc72.67216001@news.oz.net>

On Fri, 15 Apr 2005 16:44:58 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:

>Here is a first draft of a PEP for thunks.  Please let me know what you 
>think. If there is a positive response, I will create a real PEP.
>
>I made a patch that implements thunks as described here. It is available 
>at:
>     http://staff.washington.edu/sabbey/py_do
>
>Good background on thunks can be found in ref. [1].

UIAM most of that pre-dates decorators. What is the relation of thunks
to decorators and/or how might they interact?

>
>Simple Thunks
>-------------
>
>Thunks are, as far as this PEP is concerned, anonymous functions that 
>blend into their environment. They can be used in ways similar to code 
>blocks in Ruby or Smalltalk. One specific use of thunks is as a way to 
>abstract acquire/release code. Another use is as a complement to 
>generators.

"blend into their environment" is not very precise ;-)
If you are talking about the code executing in the local namespace
as if part of a suite instead of apparently defined in a separate function,
I think I would prefer a different syntax ;-)

>
>A Set of Examples
>=================
>
>Thunk statements contain a new keyword, 'do', as in the example below. The 
>body of the thunk is the suite in the 'do' statement; it gets passed to 
>the function appearing next to 'do'. The thunk gets inserted as the first 
>argument to the function, reminiscent of the way 'self' is inserted as the 
>first argument to methods.
>
>def f(thunk):
>    before()
>    thunk()
>    after()
>
>do f():
>    stuff()
>
>The above code has the same effect as:
>
>before()
>stuff()
>after()
Meaning "do" forces the body of f to be exec'd in do's local space? What if there
are assignments in f? I don't think you mean that would get executed in do's local space,
that's what the thunk call is presumably supposed to do...

But let's get on to better examples, because this is probably confusing some, and I think there
are better ways to spell most use cases than we're seeing here so far ;-)

I want to explore using the thunk-accepting function as a decorator, and defining an anonymous
callable suite for it to "decorate" instead of using the do x,y in deco: or do f(27, 28): format.

To define an anonymous callable suite (aka thunk), I suggest the syntax for
    do x,y in deco:
        suite
should be
    @deco
    (x, y):        # like def foo(x, y):  without the def and foo
        suite

BTW, just dropping the def makes for a named thunk (aka callable suite), e.g.
    foo(x, y):
        suite
which you could call like
    foo(10, 4)
with the local-where-suite-was-define effect of
    x = 10
    y = 4
    suite

BTW, a callable local suite also makes case switching by calling through locals()[xsuitename]()
able to rebind local variables. Also, since a name is visible in an enclosing scope, it could
conceivably provide a mechanism for rebinding there. E.g.,

    def outer():
        xsuite(arg):
           x = arg
        def inner():
           xsuite(5)
        x = 2
        print x # => 2
        inner()
        print x # => 5

But it would be tricky if outer returned inner as a closure.
Or if it returned xsuite, for that matter. Probably simplest to limit
callable suites to the scope where they're defined.

>
>Other arguments to 'f' get placed after the thunk:
>
>def f(thunk, a, b):
>     # a == 27, b == 28
>     before()
>     thunk()
>     after()
>
>do f(27, 28):
>     stuff()
I'm not sure how you intend this to work. Above you implied (ISTM ;-)
that the entire body of f would effectively be executed locally. But is that
true? What if after after() in f, there were a last statment hi='from last statement of f'
Would hi be bound at this point in the flow (i.e., after d f(27, 28): stuff() )?

I'm thinking you didn't really mean that. IOW, by magic at the time of calling thunk from the
ordinary function f, thunk would be discovered to be what I call an executable suite, whose
body is the suite of your do statement.

In that case, f iself should not be a callable suite, since its body is _not_ supposed to be called locally,
and other than the fact that before and after got called, it was not quite exact to say it was _equivalent_ to

before()
stuff() # the do suite
after()

In that case, my version would just not have a do, instead defining the do suite
as a temp executable suite, e.g., if instead


we make an asignment in the suite, to make it clear it's not just a calling thing, e.g.,

 do f(27, 28):
      x = stuff()

then my version with explict name callable suite would be

 def f(thunk, a, b):
      # a == 27, b == 28
      before()
      thunk()
      after()

 set_x():
     x = stuff() # to make it plain it's not just a calling thing

 f(set_x, 27, 28)
 # x is now visible here as local binding

but a suitable decorator and an anonymous callable suite (thunk defined my way ;-) would make this

 @f(27, 28)
 (): x = stuff()


>
>Thunks can also accept arguments:
>
>def f(thunk):
>    thunk(6,7)
>
>do x,y in f():
>    # x==6, y==7
>    stuff(x,y)

IMO
    @f
    (x, y): stuff(x, y)   # like def foo(x, y): stuff(x, y)

is clearer, once you get used to the missing def foo format

>
>The return value can be captured
>
This is just a fallout of f's being an ordinary function right?
IOW, f doesn't really know thunk is not an ordinary callable too?
I imagine that is for the CALL_FUNCTION byte code implementation to discover?

>def f(thunk):
>    thunk()
>    return 8
>
>do t=f():
>    # t not bound yet
>    stuff()
>
>print t
>==> 8
That can't be done very well with a decorator, but you could pass an
explicit named callable suite, e.g.,

     thunk(): stuff()
     t = f(thunk)
>
>Thunks blend into their environment
ISTM this needs earlier emphasis ;-)

>
>def f(thunk):
>    thunk(6,7)
>
>a = 20
>do x,y in f():
>    a = 54
>print a,x,y
>
>==> 54,6,7

IMO that's more readable as

    def f(thunk):
        thunk(6, 7)
    @f
    (x, y):         # think def foo(x, y): with "def foo" missing to make it a thunk
        a = 54
    print a,x,y

IMO we need some real use cases, or we'll never be able to decide what's really useful.
>
>Thunks can return values.  Since using 'return' would leave it unclear 
>whether it is the thunk or the surrounding function that is returning, a 
>different keyword should be used. By analogy with 'for' and 'while' loops, 
>the 'continue' keyword is used for this purpose:
Gak ;-/
>
>def f(thunk):
>    before()
>    t = thunk()
>    # t == 11
>    after()
>
>do f():
>    continue 11

I wouldn't think return would be a problem if the compiler generated a
RETURN_CS_VALUE instead of RETURN_VALUE when it saw the end of
the callable suite (hence _CS_) (or thunk ;-)
Then it's up to f what to do with the result. It might pass it to after() sometimes.

>
>Exceptions raised in the thunk pass through the thunk's caller's frame 
>before returning to the frame in which the thunk is defined:
But it should be possible to have try/excepts within the thunk, IWT?
>
>def catch_everything(thunk):
>     try:
>         thunk()
>     except:
>         pass    # SomeException gets caught here
>
>try:
>     do catch_everything():
>        raise SomeException
>except:
>     pass        # SomeException doesn't get caught here because it was 
>already caught
>
>Because thunks blend into their environment, a thunk cannot be used after 
>its surrounding 'do' statement has finished:
>
>thunk_saver = None
>def f(thunk):
>     global thunk_saver
>     thunk_saver = thunk
>
>do f():
>     pass
>
>thunk_saver() # exception, thunk has expired
Why? IWT the above line would be equivalent to executing the suite (pass) in its place.
What happens if you defined

def f(thunk):
    def inner(it):
        it()
    inner(thunk)

do f():
    x = 123

Of course, I'd spell it
    @f
    (): x = 123

Is there a rule against that (passing thunk on to inner)?

>
>'break' and 'return' should probably not be allowed in thunks.  One could 
>use exceptions to simulate these, but it would be surprising to have 
>exceptions occur in what would otherwise be a non-exceptional situation. 
>One would have to use try/finally blocks in all code that calls thunks 
>just to deal with normal situations.  For example, using code like
>
>def f(thunk):
>     thunk()
>     prevent_core_meltdown()
>
>with code like
>
>do f():
>     p = 1
>return p
>
>would have a different effect than using it with
>
>do f():
>     return 1
>
>This behavior is potentially a cause of bugs since these two examples 
>might seem identical at first glance.
I think less so with decorator and anonymous callable suite format

    @f
    (): return 1  # as in def foo(): return 1  -- mnemonically removing "def foo"

>
>The thunk evaluates in the same frame as the function in which it was 
>defined. This frame is accessible:
>
>def f(thunk):
>     frame = thunk.tk_frame
      # no connection with tkinter, right? Maybe thunk._frame would also say be careful ;-)  
      assert sys._getframe(1) is frame # ?? when does that fail, if it can?
>
>do f():
>     pass
>
>Motivation
>==========
>
>Thunks can be used to solve most of the problems addressed by PEP 310 [2] 
>and PEP 288 [3].
>
>PEP 310 deals with the abstraction of acquire/release code. Such code is 
>needed when one needs to acquire a resource before its use and release it 
>after.  This often requires boilerplate, it is easy to get wrong, and 
>there is no visual indication that the before and after parts of the code 
>are related.  Thunks solve these problems by allowing the acquire/release 
>code to be written in a single, re-usable function.
>
>def acquire_release(thunk):
>    f = acquire()
>    try:
>       thunk(f)
>    finally:
>       f.release()
>
>do t in acquire_release():
>    print t
>
That could be done as a callable suite and decorator
   @acquire_release
   (t): print t   # like def foo(t): print t except that it's a thunk (or anonymous callable suite ;-)

BTW, since this callable suite definition is not named, there is no name binding
involved, so @acquire_release as a decorator doesn't have to return anything.

>More generally, thunks can be used whenever there is a repeated need for 
>the same code to appear before and after other code. For example,
>
>do WaitCursor():
>      compute_for_a_long_time()
>
>is more organized, easier to read and less bug-prone than the code
>
>DoWaitCursor(1)
>compute_for_a_long_time()
>DoWaitCursor(-1)

That would reduce to

    @WaitCursor
    (): compute_for_a_long_time()
>
>PEP 288 tries to overcome some of the limitations of generators.  One 
>limitation is that a 'yield' is not allowed in the 'try' block of a 
>'try'/'finally' statement.
>
>def get_items():
>     f = acquire()
>     try:
>         for i in f:
>             yield i   # syntax error
>     finally:
>         f.release()
>
>for i in get_items():
>     print i
>
>This code is not allowed because execution might never return after the 
>'yield' statement and therefore there is no way to ensure that the 
>'finally' block is executed.  A prohibition on such yields lessens the 
>suitability of generators as a way to produce items from a resource that 
>needs to be closed.  Of course, the generator could be wrapped in a class 
>that closes the resource, but this is a complication one would like to 
>avoid, and does not ensure that the resource will be released in a timely 
>manner.  Thunks do not have this limitation because the thunk-accepting 
>function is in control-- execution cannot break out of the 'do' statement 
>without first passing through the thunk-accepting function.
>
>def get_items(thunk):    # <-- "thunk-accepting function"
>     f = acquire()
>     try:
>         for i in f:
>             thunk(i)      # A-OK
>     finally:
>         f.release()
>
>do i in get_items():
>    print i

    @get_items
    (i): print i

But no yields in the thunk either, that would presumably not be A-OK ;-)
>
>Even though thunks can be used in some ways that generators cannot, they 
>are not nearly a replacement for generators.  Importantly, one has no 
>analogue of the 'next' method of generators when using thunks:
>
>def f():
>     yield 89
>     yield 91
>
>g = f()
>g.next()  # == 89
>g.next()  # == 91
>
>[1] see the "Extended Function syntax" thread, 
>http://mail.python.org/pipermail/python-dev/2003-February/
>[2] http://www.python.org/peps/pep-0310.html
>[3] http://www.python.org/peps/pep-0288.html

It's interesting, but I think I'd like to explore the decorator/callable suite version in some real
use cases. IMO the easy analogy with def foo(args): ... for specifying the thunk call parameters,
and the already established decorator call mechanism make this attractive. Also, if you allow named
thunks (I don't quite understand why they should "expire" if they can be bound to something. The
"thunk-accepting function" does not appear to "know" that the thunk reference will turn out to
be a real thunk as opposed to any other callable, so at that point it's just a reference,
and should be passable anywhere -- except maybe out of its defining scope, which would necessitate
generating a peculiar closure.

For a named callable suite, the decorator would have to return the callable, to preserve the binding,
or change it to something else useful. But without names, I could envisage a stack of decorators like
(not really a stack, since they are independent, and the first just uses the thunk to store a switch
class instance and a bound method to accumulate the cases ;-)

    @make_switch
    (switch, case): pass
    @case(1,2,3,5)
    (v): print 'small prime: %s'% v
    @case(*'abc')
    (v): print 'early alpha: %r'% v
    @case()
    (v): print 'default case value: %r'%v

and then being able to call
    switch('b')
and see early alpha: 'b'

Not that this example demonstrates the local rebinding capability of thunks, which was the whole
purpose of this kind of switch definition ;-/
Just substitute some interesting suites that bind something, in the place of the prints ;-)

Regards,
Bengt Richter


From tzot at sil-tec.gr  Wed Apr 20 11:20:14 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 18:20:14 +0300
Subject: random number between 0 and 20
References: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
Message-ID: <klsc611a9qqhc5ufc0rt5rm88egjn9uag5@4ax.com>

On 20 Apr 2005 08:15:02 -0700, rumours say that
aleksander.helgaker at gmail.com might have written:

>How can I generate a random number between 0 - 20 and store the number
>in nrrandom?

Just choose a random number yourself, eg. nrrandom=17 (just kidding :)


import random

nrrandom = random.randint(0,20)

See also the random.randrange function.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From bokr at oz.net  Fri Apr 22 11:43:52 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 15:43:52 GMT
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
Message-ID: <42690932.237021939@news.oz.net>

On 21 Apr 2005 20:12:40 -0700, Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

>bokr at oz.net (Bengt Richter) writes:
>
>> I would try right-clicking the shortcut icon and selecting
>> properties, then select the shortcut tab and edit the target string
>> with s/python/pythonw/ and then click ok.
>> 
>> Then try double clicking the shortcut icon again.  If that does it,
>> you're home ;-) If not, post more symptoms.
>
>Hmm, I clicked properties and the word python doesn't appear in the
>shortcut string.  The shortcut string simply points to the .py file.
Ok, in that caseput <proper path>\pythonw.exe in front of that.
If you need to have current working directory some place particular,
there is a "Start in" slot for that on the same property tab.

>I think Windows knows to run Python because of some registry entry
>that maps the .py extension to python.exe.  I don't know which entry
>and changing it sounds a little bit dangerous.
Right, but you don't have to.
>
>I did see that I could select a button launch the dos box minimized,
>so it doesn't clutter up the screen.  That mostly solves the immediate
>problem.  A more complete solution (eliminate dos box altogether)
>would be nice, but I can live with an auto-minimized box.
>
As someone else suggested, you could also change the extension on your script
from .py to .pyw (and make that change in your shortcut too (or delete it
and make a new shortcut to the renamed script), or it won't find the renamed script ;-).

If you type

    assoc .py

in a cmd console window, you should get what category of file the windows
registry thinks .py files are. (it uses an intermediate category classification
so that the category can be associated with a program -- e.g., many extensions
might be categorized as text files beside .txt and wind up starting notepad).
To find what's associated with the file category (sorry, type), type

    ftype categoryname

For .py and .pyw on my system, you get this:

[ 8:30] C:\pywk\clp>assoc .py
.py=Python.File

[ 8:30] C:\pywk\clp>assoc .pyw
.pyw=Python.NoConFile

[ 8:30] C:\pywk\clp>ftype python.File
python.File=d:\python23\python.exe "%1" %*

[ 8:30] C:\pywk\clp>ftype python.NoConFile
python.NoConFile=D:\Python23\pythonw.exe "%1" %*

To get the whole list of assocs, type it without arg
then pipe to more or window's grep aka findstr (qgrep might be avail too)

[ 8:30] C:\pywk\clp>assoc | findstr py
.py=Python.File
.pyc=Python.CompiledFile
.pyo=Python.CompiledFile

[ 8:30] C:\pywk\clp>ftype | findstr py
Python.CompiledFile=D:\Python23\python.exe "%1" %*
Python.File=d:\python23\python.exe "%1" %*
Python.NoConFile=D:\Python23\pythonw.exe "%1" %*

(I'm not running py24 via association, and in fact rarely let the system do it,
since I need to run python explictly to pipe script input or output due to broken
windows piping in file-associated script execution on my system).

NB: If you type assoc or ftype with the "=" assignment string in format that it shows you,
(e.g. assoc .py=Python.File ) you will non-gui-wise be setting the association in the registry,
assuming you have privilege, so BE CAREFUL with that ;-)

-->> Especially don't mess with .exe association! That was tricky to recover from. (I actually
did that accidentally via Netscape's gui file association thing long ago, not from the command window ;-)

(Start>run>browse can find you regedt32.exe and you can do anything you want
to the registry from there, if you have the information and privilege. The information
part is harder to get that privilege in most cases ;-)

BTW you can do a whole bunch of stuff in the target slot of a shortcut.
E.g., my main one to start a "DOS box" from the start menu[1] has

    %SystemRoot%\system32\cmd.exe /x /k prompt [$T$H$H$H$H$H$H] $P$G& d:\vc98\bin\vcvars32.bat & home.cmd & title C++

Which starts cmd.exe with /x options and /k to keep it displayed, changes the prompt, runs the .bat script to
set environment for MSVC++, runs a little command script I made called home.cmd, which enables me easily to
come back to various project "home" directories, and sets a title in the title bar, so my window is ready to go.

A different one can set me up to use Borland's Delphi command line object pascal compiler, etc., settting
appropriate path and other environment variables, so the right set of command utilities are accessible,
and others that might have the same name are not.

[1](which uses shortcuts you can get at via start>settings>taskbar>start-menu-programs> etc)

Hm, I need to set my computer clock ...

Regards,
Bengt Richter


From rbt at athop1.ath.vt.edu  Wed Apr 13 08:22:47 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 13 Apr 2005 08:22:47 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <1113388891.512839.111250@f14g2000cwb.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>
	<mailman.1819.1113380033.1799.python-list@python.org>
	<1113388891.512839.111250@f14g2000cwb.googlegroups.com>
Message-ID: <d3j2uo$2hu$1@solaris.cc.vt.edu>

runes wrote:

> Generally: I have got my experiences with the Python Manual over the
> the last 30 months Python beeing my preferred language. One of them is
> that I have to look elsewhere.

I've gotten great help from this newsgroup. By following these steps:

1. Read the docs at http://docs.python.org/modindex.html
2. Trail & Error testing.
3. If 2 doesn't work or if I don't fully understand how it's working, I 
post a message here asking for help and clarification.

I've never been disappointed with the help I've received here. There 
will always be a few wise guys who like to make snide remarks and give 
arrogant answers, but it has been my experience that 95% of the people 
who answer do so with a very helpful, encouraging attitude.


From steve at holdenweb.com  Sat Apr  9 02:22:45 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 09 Apr 2005 02:22:45 -0400
Subject: Thoughts on some stdlib modules
In-Reply-To: <ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com>
Message-ID: <d37s6b$do4$1@sea.gmane.org>

Ron_Adam wrote:
> On Fri, 08 Apr 2005 05:15:23 -0400, vegetax <vegeta.z at gmail.com>
> wrote:
> 
> 
>>Are those issues being considered right now? i cant find any PEP addressing
>>the issue especifically, at least cooking it for python 3000.
>>
>>specific topics could be:
>>
>>grouping related modules.
>>removing useless legacy modules.
>>refactoring duplicated functionality.
>>removing/redesigning poorly written modules.
>>adding a module versioning system.
> 
> 
> I've been thinking that the lib directory could be better named and
> rearranged a bit.  I sometimes mistakenly open the libs directory
> instead of lib because of the name similarity.
> 
> An alternative might be to use the name "packs" or "packages" in place
> of "lib", which would emphasize the use of packages as the primary
> method of extending python. The standard library could then be a
> package called "stdlib" within this directory. Third party packages
> would then be along side "stdlib" and not within a directory that is
> within the standard library.
> 
> It would be mostly a cosmetic change, but I believe it would be worth
> doing if it could be done without breaking programs that may have hard
> coded path references to the library.  :-/
> 
> Ron
> 
Ron:

You do a lot of thinking, don't you? :-)

This is a *very large* change, not a cosmetic one, requiring changes to 
many installation routines (including, probably, distutils) and causing 
problems for software that attempts to operate with multiple versions of 
Python - and those projects have problems enough as it is despite 
Python's quite fine record of careful development.

This seems a rather high price to pay just to avoid having you 
mistakenly avoid opening "libs" instead of "lib" - a distinction that is 
only meaningful on Windows platforms anyway, I believe.

You are correct in suggesting that the library could be better organized 
than it is, but I felt we would be better off deferring such change 
until the emergence of Python 3.0, which is allowed to break backwards 
compatibility. So, start working on your scheme now - PEP 3000 needs 
contributions. My own current favorite idea is to have the current 
standard library become the "stdlib" package, but I'm sure a lot of 
people would find that suggestion at least as half-baked as yours.

{If an idea is more-half-baked than something exactly half-baked is it 
0.4-baked or 0.6-baked? Does "more half-baked" actually mean "less baked"?)

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From juggs at dfgt.com  Thu Apr 21 17:07:45 2005
From: juggs at dfgt.com (ionic)
Date: Thu, 21 Apr 2005 22:07:45 +0100
Subject: New line
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
	<mailman.2246.1114115139.1799.python-list@python.org>
	<42680edf_3@mk-nntp-2.news.uk.tiscali.com>
	<1114116277.575910.172080@f14g2000cwb.googlegroups.com>
Message-ID: <426816a1_2@mk-nntp-2.news.uk.tiscali.com>

Got it now thanks all

--

"It's all in fun or life isn't worth it!"


"wittempj at hotmail.com" <martin.witte at gmail.com> wrote in message
news:1114116277.575910.172080 at f14g2000cwb.googlegroups.com...
> okay, you type your code in idle, and run your code by hitting the F5
> key?
>




From erikober at gmail.com  Fri Apr 29 14:34:04 2005
From: erikober at gmail.com (erikober at gmail.com)
Date: 29 Apr 2005 11:34:04 -0700
Subject: tkinter OptionMenu column break
Message-ID: <1114799644.189218.307370@g14g2000cwa.googlegroups.com>

I'm creating a OptionMenu button for a gui and I'm having a problem
where the drop down list is so long that most of the options are off
screen.  The correct behavior would be that another drop down menu list
would be created next to it with the continued options.  Here is the
small code snippet that I have now:

myOptionList = .......
OMcreate = "OptionMenu(frame, myVar, \"%s\",
command=myOMCB)"%(myOptionList)

I was thinking that there must be some variable to do this.  Any help
would be much appreciated.  Thanks!



From radam2 at tampabay.rr.com  Sat Apr  2 19:03:54 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 00:03:54 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
Message-ID: <f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>

On Sat, 02 Apr 2005 21:28:36 GMT, bokr at oz.net (Bengt Richter) wrote:

>I think it might help you to start out with very plain decorators rather than
>decorators as factory functions that return decorator functions that wrap the
>decorated function in a wrapper function. E.g., (this could obviously be
>parameterized as a single decorator factory, but I wanted to show the simplest level
>of decorator functionality)

<clipped interesting examples>  

Thanks for the examples of stacked decorators! :-)

I think I pretty much got it now, I had never needed to pass arguments
to nested "defined" functions before and none of the documentation I
have, ever mentioned that alternative.

So I didn't know I could do this:


def foo(a1):
    def fee(a2):
        return a1+a2
    return fee

fum = foo(2)(6)   <------ !!!

# fum is 8


The interesting thing about this is the 'return fee' statement gets
the (6) apparently appended to it. So it becomes 'return fee(6).

That subtle action is confusing if you don't already know about it,
which I didn't.

In this example.


def foo(a1):
    def fee(a2):
        return a1+a2
    return fee

fum = foo(2)


There is no second set of arguments to append to 'return fee', so the
name fum is pointed to object fee instead and fee is not evaluated.

This second subtle action, is also confusing if you aren't aware of
it. Since the two look the same when you examine the def statements.
So there is no reason to think they would not act the same, both
returning an function object.

Now, add in the @decorator syntax to the mix.  Which hides the extra
argument sets that are passed to the nested defined functions and the
obscuration is complete.  There then is no visual indication of where
the function calls get their arguments from, and this is what I
believe caused me to have so much trouble with this.  

Another inconsistency, although not a bad one, is that nested
'defined' function share scope, but nested function calls do not.  

Now what this means, is it will be very difficult for some people to
put it all together.  I would have gotten it sooner or later, but I
really happy to have help from comp.lang.python. on this one. :)


>I like annotated code walk-throughs. But as others have pointed out,
>it's still a bit buggy ;-)

It helped a lot, but notice that it took me several tries. That's a
strong indicator that decorators are more implicit than explicit and
that goes against the "Explicit is better than Implicit" guideline
that python tries to follow.

Maybe there are ways to make decorators -and- nested function calls a
bit more explicit?

I think a having indicators on the return statements that are meant to
return a value vs object would help readability and take some of the
mystery out as far as the un initiated are concerned.

def foo(a1):
    def fee(a2):
        def fiddle(a3):
            pass
        return a3
    return fee      # Always return a function object.
                    # Error, if argument is passed to it.
        # and

    return fee(a2)  # always require an argument,
                    # error if none is passed to it. 

Or some other way if this breaks something. But it will make it more
apparent what nested function should do.  And give clearer feed back
when trying to use or write decorators.

I'm not sure what might make @decorator more explicit. Maybe allowing
all the function to be specified as an option. Maybe it is already(?)

@decorator(a1)(foo)
def foo():
   pass


So we will have:

def foo(a1):
    def fee(a2):
        def fiddle(a3):
            pass
        return a3
    return fee      # Object always returned here or
                    # or error if argument is received.

@decorator(a1)(fum)  # Last argument optional.
def fum(a3):
    return a3

These I think are small changes that might be acceptable.  

A little more aggressive alterations would be: Requiring the
'function' argument may have a use when using stacked decorators. Then
it could be inserted into a sequence?

@deco3(postcalc)
@deco2(fum)
@deco1(precalc)
def fum(pointxyz):
    return translatepoint(pointxyz)
 
... and that reversed order... (yuck!), is it really necessary?
Readability is important, and it is a big reason people don't jump
ship for some other language. Why the exceptions here?

Ok, don't mean to grip. :-)  I'm sure there's been plenty of that in
past discussions.

Cheers,
Ron



From michael.kearns at REMOVEsaaconsultants.com  Tue Apr 12 06:35:42 2005
From: michael.kearns at REMOVEsaaconsultants.com (Michael Kearns)
Date: Tue, 12 Apr 2005 11:35:42 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <mailman.1741.1113298741.1799.python-list@python.org>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz><mailman.1724.1113261387.1799.python-list@python.org><1113264839.497914.210170@z14g2000cwz.googlegroups.com>	<425b8cf7$0$38043$bed64819@news.gradwell.net>
	<mailman.1741.1113298741.1799.python-list@python.org>
Message-ID: <425ba44e$0$38038$bed64819@news.gradwell.net>

Fredrik Lundh wrote:
> Michael Kearns wrote:

>>I would guess from the responses so far that Python 2.4 just isn't used within commercially 
>>shipping products
> 
> that kind of unfounded hyperbole only makes you look silly.

As no-one had replied that they had found it fine to use in a commercial 
sense, or pointed to other product that may use it, I'm not entirely 
sure how it makes me look any sillier than I normally do in real life.

>>I don't know.
> 
> exactly.  now calm down, and go read the replies to this thread again.  or consult
> a lawyer, and make it clear to him that you're not actually *using* the MSVCR71
> component yourself, *and* that the Python application you are using (and passing
> on to your users) is adding significant and primary functionality to the MSCVR71
> library.

I apologise if my writing suggests a lack of calm. I have fully read the 
replies, and although there are many fine suggestions of shipping 
additional products, none seems to address the lack of legality 
regarding the windows distribution other than "It's not the Python 
developers problem". Again, if I paraphrased incorrectly, I'm sorry.

As for consulting a lawyer, this is exactly what I'm trying to avoid. My 
usage of python in a commercial sense is as a small utility - a helper, 
if you will. It has no business value whatsoever, compared to the 
product that it ships with, and certainly does not warrant any 
investment regarding legal advice.

I would agree that Python is adding significant value to the library. 
Unfortunately, the Microsoft Redistribution document, from what I read, 
does not allow an end-user to further redistribute the library. I am 
that end-user, of Python.

The whole situation is already becoming far more work than if I'd used a 
different technology for what I had to achieve, and as such I have no 
desire to pursue it further. I'm once more running 2.3, and happy with that.

With respect,

Michael.


From quantumcheesedog at gmail.com  Wed Apr  6 20:41:01 2005
From: quantumcheesedog at gmail.com (python newbie)
Date: Thu, 07 Apr 2005 00:41:01 GMT
Subject: Harvestman install not working
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
	<1112811970.231676.122830@g14g2000cwa.googlegroups.com>
Message-ID: <xk%4e.19566$zl.16997@newssvr13.news.prodigy.com>

First of all, please disregard the extra posts, Anand, I need to really 
really get a new newsreader.  It kept on giving me an error, making me think 
that each sendbutton click wasnt' working.

 My mistake, I use the Harvestman.Py in the main folder, of course.

It works fine.
 Thanks again.

"Anand" <abpillai at gmail.com> wrote in message 
news:1112811970.231676.122830 at g14g2000cwa.googlegroups.com...
> Hi
>
>    Latest version of py2exe does not support the option
> --force-imports anymore I think. You can edit the .bat file to remove
> that option. It should work.
>
> -Anand
> 




From beliavsky at aol.com  Sun Apr  3 09:11:05 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 3 Apr 2005 06:11:05 -0700
Subject: text analysis in python
References: <mailman.1255.1112523725.1799.python-list@python.org>
Message-ID: <1112533865.277154.241930@o13g2000cwo.googlegroups.com>

The book "Text Processing in Python" by David Mertz, available online
at http://gnosis.cx/TPiP/ , may be helpful.



From steve at holdenweb.com  Sat Apr 30 11:11:06 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 30 Apr 2005 11:11:06 -0400
Subject: Tkinter app=App(root) problem
In-Reply-To: <1114870083.651218.160450@l41g2000cwc.googlegroups.com>
References: <1114870083.651218.160450@l41g2000cwc.googlegroups.com>
Message-ID: <d506r2$76o$1@sea.gmane.org>

snoylr at gmail.com wrote:
> This is my first day working with Tkinter.  I'm using python2.3 on
> WindowsXP. I found this program and entered it.
> 
> from Tkinter import *
> 
> class App:
>     def _init_(self,master):
           ^^^^^^

This should be __init__ (the underscores should be doubled). Python 
"magic methods" are all named in this way.

>         frame = Frame(master)
>         frame.pack()
> 
>         self.button = Button(frame, text = "Quit", fg = "red", command
> =frame.quit)
>         self.button.pack(side=LEFT)
> 
>         self.hi_there = Button(frame, text = "Hello", command =
> self.say_hi)
>         self.hi_there.pack(side=LEFT)
> 
>     def say_hi(self):
>         print "hi there, everyone!"
> 
> root = Tk()
> app = App(root)
> root.mainloop()
> 
> When I run the code in IDLE I get the initial frame but no buttons with
> the following error:
> 
> Traceback (most recent call last):
>   File "C:\Documents and Settings\INTERNET\Desktop\hello2.py", line 18,
> in ?
>     app = App(root)
> TypeError: this constructor takes no arguments
> 
> I have also tried to save the program as with a pyw extension.  Nothing
> happens when I try to run it with that extension.
> 
That's not strictly true. Nothing *appears* to happen, because the same 
error message is produced but there's no windows console to display it in.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From tjreedy at udel.edu  Thu Apr 14 13:37:53 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 14 Apr 2005 13:37:53 -0400
Subject: String manipulation
References: <Pine.LNX.4.44.0504132237250.11173-100000@feynman.ece.ualberta.ca>
	<d3ktct$h5m$1@news2.zwoll1.ov.home.nl>
Message-ID: <d3m9j3$4gp$1@sea.gmane.org>


"vincent wehren" <vincent at visualtrans.de> wrote in message 
news:d3ktct$h5m$1 at news2.zwoll1.ov.home.nl...
> "Nicholas Graham"
> | Any suggestions?

> Take a look at the built-in functions ord() and chr()
> -- Chapter 2.1 of the  manual.

And more generally, read all of Chap.2 of the Library Reference on builtin 
functions and types.  Later chapters, most of them, are 'look up when you 
need to' type stuff, but C.2 is core material that everyone should read 
after the tutorial.

Terry J. Reedy





From ionel.mc at gmail.com  Mon Apr  4 22:38:04 2005
From: ionel.mc at gmail.com (ionel)
Date: Tue, 5 Apr 2005 04:38:04 +0200
Subject: raw sockets please
Message-ID: <b322b4e60504041938e6c6ea@mail.gmail.com>

anyone got any idea how the get raw sockets working on win32 ? (on python 2.4)

-- 
ionel.


From mage at mage.hu  Sat Apr 23 16:14:11 2005
From: mage at mage.hu (Mage)
Date: Sat, 23 Apr 2005 22:14:11 +0200
Subject: Handling lists
In-Reply-To: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
References: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
Message-ID: <426AAC93.9040808@mage.hu>

superprad at gmail.com wrote:

>I have a question on python lists.
>Suppose I have a 2D list
>list = [[10,11,12,13,14,78,79,80,81,300,301,308]]
>how do I convert it so that I arrange them into bins  .
>so If i hvae a set of consecutive numbers i would like to represent
>them as a range in the list with max and min val of the range alone.
>I shd get something like 
>list = [[10,14],[78,81],[300,308]]
>
>  
>
Maybe:

list = [10,11,12,13,14,78,79,80,81,300,301,308]

new_list = []
start = 0
for i in range(1,len(list) + 1):
    if i == len(list) or list[i] - list[i-1] <> 1:
        new_list.append([list[start],list[i-1]])
        start = i

print new_list
   


From martin at v.loewis.de  Mon Apr 11 17:51:01 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 11 Apr 2005 23:51:01 +0200
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1670.1113204566.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org><ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com><mailman.1603.1113027761.1799.python-list@python.org>	<1113121254.874488.111250@f14g2000cwb.googlegroups.com><mailman.1634.1113131893.1799.python-list@python.org>	<42595E3D.7080301@v.loewis.de>
	<mailman.1670.1113204566.1799.python-list@python.org>
Message-ID: <425AF145.8030400@v.loewis.de>

Fredrik Lundh wrote:
> I can help build an infrastructure that makes it easier to create a more
> complete standard distribution, sure.  (and since this isn't exactly a new
> idea, I'm 100% confident that I don't have to do all the work myself.)
> 
> if this is needed is something for the PSF to decide, I suppose.

I can't get a clear picture what precisely would have to be done, and
how you would imagine to transition from where we are now. However, my
initial reaction would be that the PSF traditionally stays out of any
kind of technical decision on the Python source code and distribution
(*). It is to support the development of Python, not to control it. So
my intuition is that perhaps you could just start. If you need to
arrange something on python.org, you could well do so. If you want to
change the way in which Python is released, you would have to convince
the release manager (primarily) of doing things differently - if your
plan involves changes to the way Python is released.

So in the end, I think this sort of change will require some convincing,
which, in turn, may require to fill paper of what the proposed changes
are and how they could come about.

Regards,
Martin

(*) Atleast formally. Informally, the opinion of the PSF members (not
the formal vote of the directors) clearly does have impact on the future
of Python - as many of the PSF members are also contributors to Python.


From gtg856h at mail.gatech.edu  Sat Apr  9 00:12:15 2005
From: gtg856h at mail.gatech.edu (Brian Kazian)
Date: Sat, 9 Apr 2005 00:12:15 -0400
Subject: Python Equivalent to Java Interfaces?
Message-ID: <d37kmc$lrp$1@news-int2.gatech.edu>

I want to insure that all subclasses implement a certain method, but could 
not find anything that would do this for me.  Is there anyway in Python to 
implement this check?  Thanks! 




From xah at xahlee.org  Tue Apr  5 01:58:38 2005
From: xah at xahlee.org (Xah Lee)
Date: 4 Apr 2005 22:58:38 -0700
Subject: EOL created by .write or .encode
Message-ID: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>

Why is that some of my files written out by
   outF.write(outtext.encode('utf-8'))
has ascii 10 as EOL, while others has ascii 13 as EOL?
both of these files's EOL are originally all ascii 10.

If i remove the EOL after the tt below in the place string, then this
doesn't happen.

findreplace = [
(ur'</body>',
ur'''tt
</body>'''),
]

...

   inF = open(filePath,'rb')
   s=unicode(inF.read(),'utf-8')
   inF.close()

   for couple in findreplace:
       outtext=s.replace(couple[0],couple[1])
       s=outtext
   outF = open(tempName,'wb')
   outF.write(outtext.encode('utf-8'))
   outF.close()

thanks.

 Xah
 xah at xahlee.org
? http://xahlee.org/PageTwo_dir/more.html ?



From mauriceling at acm.org  Thu Apr 28 22:37:51 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 29 Apr 2005 12:37:51 +1000
Subject: New Python website
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
Message-ID: <42719DFF.5080504@acm.org>

lpe wrote:

> http://www.pycode.com
> 
> I was kinda suprised when I could not find any good sites with 3rd
> party modules (other than the Vaults of Parnassus, where you must host
> files elsewhere), so I decided to write one myself :)
> It is brand new and might still be buggy, but hopefully it will be
> usefull to some people.  Feel free to join and upload any of your code.
> thanks
> 

Hi,

Just yesterday, I was frustrated waiting for replies from Catelog-SIG 
about the possibilities of a package management system that works like 
Fink (fink.sf.net). Basically, the problems I see is that C extension 
modules aren't portable across major Python revisions and there is no 
easy way to maintain the installed packages in site-packages directory. 
My scenario is that a system admin has to maintain 50 different 
libraries and their dependencies...

So I've decided to write something myself... and call it 'centipyde'.

Modelled against Fink and Darwinports (darwinports.opendarwin.org) 
(obviously I'm a Mac user), information (in text file) are in a folder 
(centipyde/pkginfo/) as .info files. Each package will have a .info file 
which tells the system (centipyde) where to download the source tar (or 
zip) and how to install the package, as well as the dependecies, 
maintaining the installed packages etc etc. No difference from other 
package managers (a goal)...

It is still very rough at this moment, so please bear with me. 
Basically, the user will have to cvs checkout the system and just run it.

I've checked it into Sourceforge, under IB-DWB project (which is 
abandoned) as 'centipyde'. But for some reason, I still can't view it in 
  ViewCVS yet. Anyway, the directory layout is

../centipyde
../centipyde/centipyde.py
../centipyde/pgkinfo
../centipyde/pgkinfo/ply15.info


ply15.info contains the following text (pretty much modelled against Fink):

package=ply15
maintainer=.
dependencies=.
downloadurl=http://systems.cs.uchicago.edu/ply/ply-1.5.tar.gz
prebuildscript=tar zxvf ply-1.5.tar.gz
sourcedir=ply-1.5
buildscript=python setup.py build
installscript=sudo python setup.py install


centipyde.py is the following:
=====================================================

"""
Author: Maurice H.T. Ling <mauriceling at acm.org>
Copyright (c) 2005 Maurice H.T. Ling
Date created : 28th April 2005
"""

PKGINFOPATH = 'pkginfo'
INSTALL_LOG = 'install.log'

import os
import string
import sys

def install_package(package_name):
     f = open(os.getcwd() + os.sep + PKGINFOPATH + os.sep + package_name 
+ '.info', 'r')
     install_info = {}
     for line in f.readlines():
         line = string.split(line, '=')
         if line[1][-1] == os.linesep:
             install_info[line[0]] = string.strip(line[1][:-1])
         else: install_info[line[0]] = string.strip(line[1])
     f.close()
     print "Package Installation Information: " + str(install_info)

     os.system('curl -O ' + str(install_info['downloadurl']))

     preinstall = []
     preinstall = string.split(install_info['prebuildscript'], ';')
     for cmd in preinstall: os.system(cmd)

     cwd = os.getcwd()
     print cwd
     os.chdir(os.path.join(os.getcwd(), install_info['sourcedir']))
     print os.getcwd()

     buildscript = []
     buildscript = string.split(install_info['buildscript'], ';')
     for cmd in buildscript: os.system(cmd)

     installscript = []
     installscript = string.split(install_info['installscript'], ';')
     for cmd in installscript: os.system(cmd)


if sys.argv[1] == 'install':
     install_package(sys.argv[2])

=====================================================

When I run "python centipyde.py install ply15", PLY1.5 gets downloaded 
from David Beazley's website, uncompressed and installed into the 
site-package as shown here:


znichols-maurice:~/MyProjects/ib-dwb/centipyde mauriceling$ ls -alltotal 8
drwxr-xr-x   5 mauricel  mauricel   170 28 Apr 17:37 .
drwxr-xr-x  10 mauricel  mauricel   340 28 Apr 16:21 ..
drwxr-xr-x   5 mauricel  mauricel   170 28 Apr 17:33 CVS
-rw-r--r--   1 mauricel  mauricel  1385 28 Apr 23:47 centipyde.py
drwxr-xr-x   4 mauricel  mauricel   136 28 Apr 17:36 pkginfo
znichols-maurice:~/MyProjects/ib-dwb/centipyde mauriceling$ sudo python 
centipyde.py install ply15
Package Installation Information: {'maintainer': '.', 'sourcedir': 
'ply-1.5', 'package': 'ply15', 'downloadurl': 
'http://systems.cs.uchicago.edu/ply/ply-1.5.tar.gz', 'installscript': 
'sudo python setup.py install', 'dependencies': '.', 'buildscript': 
'python setup.py build', 'prebuildscript': 'tar zxvf ply-1.5.tar.gz'}
   % Total    % Received % Xferd  Average Speed          Time 
   Curr.
                                  Dload  Upload Total    Current  Left 
   Speed
100 69278  100 69278    0     0   7746      0  0:00:08  0:00:08  0:00:00 
31811
ply-1.5/
ply-1.5/doc/
ply-1.5/doc/ply.html
ply-1.5/CHANGES
ply-1.5/COPYING

..... [snipped] .....

ply-1.5/test/yacc_uprec.exp
ply-1.5/test/yacc_uprec.py
/sw/lib/python2.3/distutils/dist.py:213: UserWarning: 'licence' 
distribution option is deprecated; use 'license'
   warnings.warn(msg)
running build
running build_py
creating build
creating build/lib
copying lex.py -> build/lib
copying yacc.py -> build/lib
/sw/lib/python2.3/distutils/dist.py:213: UserWarning: 'licence' 
distribution option is deprecated; use 'license'
   warnings.warn(msg)
running install
running build
running build_py
running install_lib
znichols-maurice:~/MyProjects/ib-dwb/centipyde mauriceling$
================================

I think there are some obvious ways that we might work together...

Cheers
Maurice


From nszabolcs at gmail.com  Wed Apr 27 17:22:32 2005
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 27 Apr 2005 14:22:32 -0700
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<mailman.2580.1114613011.1799.python-list@python.org>
	<1114616192.342452.178720@o13g2000cwo.googlegroups.com>
	<mailman.2584.1114617214.1799.python-list@python.org>
	<1114626660.172481.303090@z14g2000cwz.googlegroups.com>
Message-ID: <1114636952.944082.233220@f14g2000cwb.googlegroups.com>

I forgot to mention in my previous post that the best thing in wxPython
is the wxPython demo. It helped me a lot. Browsing through the examples
usually faster than browsing through the api doc.

About XRCed:
I put every static components of the window layout in an xml file with
XRCed
(not static components: buttons moving around, changing labels ...)

Generally my code looks like:

import wx
import wx.xrc

class Frame(wx.Frame):
	def __init__(self, parent, resource):
		w = resource.LoadFrame(parent, 'FrameName')
		self.PostCreate(w)
		self.SetIcon(wx.Icon('myapp.ico', wx.BITMAP_TYPE_ICO))

		...
		#lots of init code here

	...
	#event handlers here


class App(wx.App):
	def OnInit(self):
		resource = wx.xrc.XmlResource('myapp.xrc')
		self.f = Frame(None, resource)
		self.f.Show()
		return True

if __name__ == '__main__':
	app = App()
	app.MainLoop()



From ville at spammers.com  Fri Apr  1 07:55:58 2005
From: ville at spammers.com (Ville Vainio)
Date: 01 Apr 2005 15:55:58 +0300
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <d2j9nf$h0g$1@news.sap-ag.de>
Message-ID: <du7ll82mza9.fsf@lehtori.cc.tut.fi>

>>>>> "Daniel" == Daniel Dittmar <daniel.dittmar at sap.corp> writes:

    Daniel> Ville Vainio wrote:

    >> I need a dict (well, it would be optimal anyway) class that
    >> stores the keys as strings without coercing the case to upper
    >> or lower, but still provides fast lookup (i.e. uses hash
    >> table).

    Daniel> Store the original key together with the value and use a
    Daniel> lowercase key for lookup.

That's what I thought initially, but the strings take most of the
space in dict and I didn't feel like doubling the size.

It would be the "simplest thing that could possibly work", though.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From codecraig at gmail.com  Mon Apr 18 16:09:26 2005
From: codecraig at gmail.com (codecraig)
Date: 18 Apr 2005 13:09:26 -0700
Subject: Tkinter & Tkconstants
Message-ID: <1113854966.648882.235040@l41g2000cwc.googlegroups.com>

Hi,
  I was reading through the Tkinter tutorial at
http://www.pythonware.com/library/tkinter/introduction/index.htm ...and
it mentions that by doing,

from Tkinter import *

you have access to the constants in Tkconstants, since Tkinter imports
it automatically.

However, in the shell if I do..

from Tkinter import *

print Tkinter.HORIZONTAL

I get an error..NameError: Tkinter is not defined

any ideas?  However, if I do,

import Tkconstants
print Tkconstants.HORIZTONAL

I get what i expect.  but according to the tutorial i should only need
Tkinter.

Thanks.



From grante at visi.com  Fri Apr  8 00:04:00 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 08 Apr 2005 04:04:00 -0000
Subject: Sockets
References: <36qb5199613lai084brifj8judpoummv6n@4ax.com>
	<mailman.1514.1112928735.1799.python-list@python.org>
	<idtb51pj2m244815tcoicsiee7h3n69v9j@4ax.com>
Message-ID: <115c0lg17silfcd@corp.supernews.com>

On 2005-04-08, Dan <dan at dontspammecauseidontlikit.com> wrote:
> On Thu, 7 Apr 2005 21:52:11 -0500, jepler at unpythonic.net wrote:
>
>>Python strings always carry their length, and can have embedded NULs.
>>    s.write("\0\1\2\3")
>>should write 4 bytes to the socket 's'.
>
> I'm taking binary data from a database, so it's not really a Python
> string.  Is there an easy way to convert it?

The struct module.

-- 
Grant Edwards                   grante             Yow!  I want to read my new
                                  at               poem about pork brains and
                               visi.com            outer space...


From codecraig at gmail.com  Fri Apr 15 13:03:05 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 10:03:05 -0700
Subject: py2exe - create one EXE
In-Reply-To: <1113582492.351604.257570@z14g2000cwz.googlegroups.com>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<mailman.1977.1113579964.1799.python-list@python.org>
	<1113580317.027071.183640@z14g2000cwz.googlegroups.com>
	<1113582492.351604.257570@z14g2000cwz.googlegroups.com>
Message-ID: <1113584585.082256.246110@z14g2000cwz.googlegroups.com>

oh and Fredrik, i tried the SingleInstaller link....which points to a
script using NSIS.  I followed those instructions which generated an
.exe.   HOwever, when i run the .exe nothing happens (meaning no
process starts, no output, no errors, nothing).

any ideas on that?  have ever used it?



From jason.mobarak at gmail.com  Tue Apr 26 23:24:25 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 26 Apr 2005 20:24:25 -0700
Subject: How remove directories with the content in the platform
	independent way?
In-Reply-To: <7_adnZLgfvS1YPPfRVn-rg@comcast.com>
References: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>
	<mailman.2555.1114569257.1799.python-list@python.org>
	<7_adnZPgfvQeYfPfRVn-rg@comcast.com>
	<7_adnZLgfvS1YPPfRVn-rg@comcast.com>
Message-ID: <1114572265.625931.221840@l41g2000cwc.googlegroups.com>

There's also the shutil module, which is platform independant.

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

...see the rmtree function



From jfj at freemail.gr  Thu Apr 28 11:45:53 2005
From: jfj at freemail.gr (jfj)
Date: Thu, 28 Apr 2005 18:45:53 +0300
Subject: Can .py be complied?
In-Reply-To: <1114696910.862093.100690@z14g2000cwz.googlegroups.com>
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
Message-ID: <42710531.6060006@freemail.gr>

beliavsky at aol.com wrote:

> IMO the fact that so many people ask
> 
> "How can I create executables in Python on Windows"
> 
> indicates that standard "batteries included" Windows Python
> distribution is missing a vital battery. There are tools such as
> py2exe, but this functionality should be built-in, so that a newbie to
> Python can just download it, type
> 
> python -o foo.exe foo.py
> 
> at the command line, and get an executable, without any further effort.
> 


Since this is about windows and windows users just want everything in
".exe" form (no matter if it also contains spyware), and they don't care
about the size of it (they just want the damn exe) and since there is
zero chance that python will be included in the next windows
distribution but these people still want the exe (they do, really),
I think I have a convenient solution to give it to them.

/* small program in C in self extracting archive
  */
if (have_application ("Python")) {
   have_python:
   system ("python.exe my_application.py")
} else {
   printf ("This software requires python. Wait until all the
necessary components are being installed\n");
   download_python_from_python_org();
   system ("install_python.exe");
   goto have_python;
}


Seriously, people who want executables wouldn't notice the difference.


jfj



From nyamatongwe+gravity at gmail.com  Wed Apr  6 17:16:03 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Wed, 06 Apr 2005 21:16:03 GMT
Subject: I've broken PythonWin2.4 - Dialogs don't pop up!
References: <1112815685.437815.285680@f14g2000cwb.googlegroups.com>
Message-ID: <MPG.1cbefb05fd509d27989685@news-server>

   Michael Murdock:

> I have broken PythonWin and I don't know how or why. It worked great
> until recently. I have installed / removed several apps since it worked
> last. I could have a virus unknown to my antivirus program, I guess.
> I'm stumped.

   You have tried rebooting? PythonWin can be upset by another non-
responding application. A simple thing to try is to remove and reinstall 
in case you have modified one of the files in Pythonwin.

   Neil


From roy at panix.com  Fri Apr 22 13:22:09 2005
From: roy at panix.com (Roy Smith)
Date: 22 Apr 2005 13:22:09 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<3csdegF6p6jpnU1@individual.net> <d4b32c$mo7$1@panix2.panix.com>
	<3csphpF6es7iuU1@individual.net>
Message-ID: <d4bbs1$hag$1@panix2.panix.com>

In article <3csphpF6es7iuU1 at individual.net>,
Reinhold Birkenfeld  <reinhold-birkenfeld-nospam at wolke7.net> wrote:
>Roy Smith wrote:
>
>>>Other possibility, probably faster when almost all keys in the range are in
>>>the dictionary:
>>>
>>>class sdict(dict):
>>>    def __getitem__(self, index):
>>>        if isinstance(index, slice):
>>>            d = {}
>>>            for key in xrange(slice.start, slice.stop, slice.step):
>>>                if key in self:
>>>                    d[key] = self[key]
>>>            return d
>>>        else:
>>>            return dict.__getitem__(self, index)
>> 
>> The problem with that is it requires the keys to be integers.
>
>Yes, but wasn't it thought as a replacement for a list?

Originally, yes.  I went off on a tangent with string-keyed slices.




From vze4rx4y at verizon.net  Mon Apr 18 20:13:16 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Tue, 19 Apr 2005 00:13:16 GMT
Subject: Behaviour of str.split
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
	<24a8619qhstqjrfi6vdit27bo8r4afd5nf@4ax.com>
Message-ID: <w2Y8e.12690$Fm5.10641@trndny09>

[Will McGugan]
> >I'm curious about the behaviour of the str.split() when applied to empty
> >strings.
> >
> >"".split() returns an empty list, however..
> >
> >"".split("*") returns a list containing one empty string.

[John Machin]
> You are missing a perusal of the documentation. Had you done so, you
> would have noticed that the actual behaviour that you mentioned is
> completely the reverse of what is in the documentation!

Nuts!  I've got it from here and will get it fixed up.

<lament>
str.split() has to be one of the most frequently revised pieces of
documentation.  In this case, the two statements about splitting empty strings
need to be swapped.  Previously, all the changes occured because
someone/somewhere would always find a way to misread whatever was there.

In the absence of reading the docs, a person's intuition seems to lead them to
guess that the behavior will be different than it actually is.  Unfortunately,
one person's intuition is often at odds with another's.
</lament>


Raymond Hettinger




From evenprimes at gmail.com  Thu Apr 14 08:16:05 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Thu, 14 Apr 2005 08:16:05 -0400
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <8c7f10c605041401491b7dd900@mail.gmail.com>
References: <d3ekhf$a0f$1@lairds.us> <3c670tF6jdeqrU1@individual.net>
	<8c7f10c605041401491b7dd900@mail.gmail.com>
Message-ID: <f03f4fdf050414051659b1e2a3@mail.gmail.com>

+1 on _that_ being a QOTW!

On 4/14/05, Simon Brunning <simon.brunning at gmail.com> wrote:
[snip]
> 
> Try and think of something else witty to say over the next day or two
> - I'm sure I can squeeze you into next week's. ;-)


-- 
"I was born not knowing and have had only a little time to change that
here and there." -- Richard Feynman


From mwh at python.net  Tue Apr  5 05:42:18 2005
From: mwh at python.net (Michael Hudson)
Date: Tue, 5 Apr 2005 09:42:18 GMT
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1223.1112417955.1799.python-list@python.org>
	<7xy8c1hic8.fsf@ruckus.brouhaha.com>
Message-ID: <m34qel7e6f.fsf@pc150.maths.bris.ac.uk>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Tim Peters <tim.peters at gmail.com> writes:
> > The GIL is your friend here:
> > 
> >     import itertools
> >     f = itertools.count().next
> 
> Thanks, I was hoping something like this would work but was not sure I
> could rely on it.
> 
> > A similar thing can be done with xrange.  But either way sucks if you
> > call it often enough to exceed the size of a Python short int
> > (platform C long).  The obvious way with an explicit mutex doesn't
> > have that problem.
> 
> Xrange, of course :).  I don't need to exceed the size of a short int,
> so either of these should work fine.  I wonder what measures the Pypy
> implementers will take (if any) to make sure these things keep
> working, but for now I won't worry about it.

Well, for now we don't support threads.  Easy!

Cheers,
mwh
(no, really, this is for the future)

-- 
  Two things I learned for sure during a particularly intense acid
  trip in my own lost youth: (1) everything is a trivial special case
  of something else; and, (2) death is a bunch of blue spheres.
                                             -- Tim Peters, 1 May 1998


From franz.steinhaeusler at utanet.at  Thu Apr 28 03:41:13 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Thu, 28 Apr 2005 09:41:13 +0200
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
	<mailman.2577.1114611436.1799.python-list@python.org>
Message-ID: <sp41715nrkvu7r743brtrdcfils75f6bdg@4ax.com>

On Wed, 27 Apr 2005 10:17:13 -0400, Bill Mill <bill.mill at gmail.com>
wrote:

>On 4/27/05, monkey <m at m.com> wrote:
>> Read through python site for programming tool, really plenty of choices :-)
>> (For c++, I just can't breath with very very limited choices)
>> 
>> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
>> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
>> also worth looking. Actually which one are you guys using? and why? I think
>> it is also valuable for those who are new to python as me.
>> 
>
>Believe it or not, this has been discussed before :)

But nevertheless interesting again and again :)



-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From littlejohn.75 at news.free.fr  Fri Apr  1 17:01:25 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 01 Apr 2005 22:01:25 GMT
Subject: that is it is not it (logic in Python)
References: <424d0be1$0$2882$626a14ce@news.free.fr>
	<mailman.1199.1112380840.1799.python-list@python.org>
Message-ID: <424dc4b4$0$18707$636a15ce@news.free.fr>

Le Fri, 1 Apr 2005 13:39:47 -0500, Terry Reedy a ?crit :
> 
> "F. Petitjean" <littlejohn.75 at news.proxad.net> wrote in message 
> news:424d0be1$0$2882$626a14ce at news.free.fr...
> 
>>>>> iterable = range(10)
>>>>> it = iter(iterable)
>>>>> that = iter(it)
>>>>> that is it
>> True    # Good!
>>>>> that is it is not it
> 
> This is equivalent to '(that is it) and (it is not it)' which is clearly 
> false.
> 
>> False   # What ?
> 
> Reread the ref manual on chained comparison operators.
And see the date of the post :-)
that is it  isn't it ?
> 
> Terry J. Reedy
> 
> 
> 


From mauriceling at acm.org  Thu Apr  7 21:10:24 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 08 Apr 2005 11:10:24 +1000
Subject: text processing problem
References: <d34a7f$gnd$1@domitilla.aioe.org>
	<1112915641.663333.175260@f14g2000cwb.googlegroups.com>
	<d34j31$nu6$1@domitilla.aioe.org>
	<1112922056.365893.307550@f14g2000cwb.googlegroups.com>
Message-ID: <d34lm5$pfe$1@domitilla.aioe.org>

Matt wrote:
> I'd HIGHLY suggest purchasing the excellent <a
> href="http://www.oreilly.com/catalog/regex2/index.html">Mastering
> Regular Expressions</a> by Jeff Friedl.  Although it's mostly geared
> towards Perl, it will answer all your questions about regular
> expressions.  If you're going to work with regexs, this is a must-have.
> 
> That being said, here's what the new regular expression should be with
> a bit of instruction (in the spirit of teaching someone to fish after
> giving them a fish ;-)   )
> 
> my_expr = re.compile(r'(\w+)\s*(\(\1\))')
> 
> Note the "\s*", in place of the single space " ".  The "\s" means "any
> whitespace character (equivalent to [ \t\n\r\f\v]).  The "*" following
> it means "0 or more occurances".  So this will now match:
> 
> "there  (there)"
> "there (there)"
> "there(there)"
> "there                                          (there)"
> "there\t(there)" (tab)
> "there\t\t\t\t\t\t\t\t\t\t\t\t(there)"
> etc.
> 
> Hope that's helpful.  Pick up the book!
> 
> M@
> 

Thanks again. I've read a number of tutorials on regular expressions but 
it's something that I hardly used in the past, so gone far too rusty.

Before my post, I've tried
my_expr = re.compile(r'(\w+) \s* (\(\1\))') instead but it doesn't work, 
so I'm a bit stumped......

Thanks again,
Maurice


From rune.strand at gmail.com  Mon Apr 18 14:18:28 2005
From: rune.strand at gmail.com (runes)
Date: 18 Apr 2005 11:18:28 -0700
Subject: Behaviour of str.split
In-Reply-To: <1113847387.862751.61780@f14g2000cwb.googlegroups.com>
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
	<1113838796.626344.309630@l41g2000cwc.googlegroups.com>
	<1113847387.862751.61780@f14g2000cwb.googlegroups.com>
Message-ID: <1113848308.429271.147840@f14g2000cwb.googlegroups.com>

[Tim N. van der Leeuw]
> Fortunately, this is easy to write as: list("mystring").

Sure, and map(None, "mystring")

Anyways, I have settled with this bevaviour, more or less ;-)

Rune



From johan at pulp.se  Wed Apr  6 12:46:24 2005
From: johan at pulp.se (Johan Lindberg)
Date: 6 Apr 2005 09:46:24 -0700
Subject: HTML editor component?
References: <3a6b56F665r0lU1@individual.net>
	<mailman.660.1111357793.1799.python-list@python.org>
	<3a6demF6aadf4U1@individual.net>
Message-ID: <1112805984.613082.9460@l41g2000cwc.googlegroups.com>

You could try the (very) simple HTML editor I use for my CM project. It
can only handle B, I, U and A, but then again, it was never meant to do
more. It's written in wxPython, based on Scintilla and can probably be
extended to fit your needs.

You can find it here:
http://sourceforge.net/project/showfiles.php?group_id=72786&package_id=138707

BR
/Johan Lindberg



From sutram at gmail.com  Fri Apr 15 16:01:15 2005
From: sutram at gmail.com (Mahesh)
Date: 15 Apr 2005 13:01:15 -0700
Subject: Python 2.4.1 hang
Message-ID: <1113595275.615168.189790@o13g2000cwo.googlegroups.com>

Hi,

This is on WinXP SP1.

I needed to get to the POST body and while I was trying out various
regular expressions, one of them caused Python to hang. The Python
process was taking up 100% of the CPU. I couldn't even see the "Max
recursion depth exceeded message". Is this a bug? Code below:

import re

s = \
"""POST /TradeManagement-RT3/ReportController.Servlet HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/vnd.ms-excel, application/vnd.ms-powerpoint,
application/msword, */*
Referer: https://dummy.com/TradeManagement-RT3/PrelimReportSearch.jsp
Accept-Language: en-us
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR
1.0.3705)
Host: dummy.com
Content-Length: 267
Connection: Keep-Alive
Cache-Control: no-cache
Cookie:
SMSESSION=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;
CCTMRT3=O0PVLBMWBVD2115CLLS4REI

EntrySourceDescription=All&SEARCHReportType=All&SEARCHReportStatus=All&available=IC&SEARCHReportCommodity=All&SortContract_Year=1&SortTrade_Price=&SortOrder_Type=&SortBuy_Sell_Ind=&SortAccount_Number=&SortExternal_TradeId=&GroupBy=contract&command=PrelimReportCommand"""

#pattern_str = "^POST.*\\r\\n\\r((\\n)|(\\n[^\r]*))"
#pattern_str = "^POST.*\\n((\\n)|(\\n[^\r]*&))"
pattern_str = "^POST(.*\\n*)+\\n\\n" # <--- Offending pattern

pattern = re.compile(pattern_str)

match = pattern.match(s);

if match:
    print match.groups()



From gsakkis at rutgers.edu  Sat Apr  9 14:35:43 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 9 Apr 2005 11:35:43 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
	<mailman.1596.1113015264.1799.python-list@python.org>
	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>
	<mailman.1607.1113039130.1799.python-list@python.org>
	<1113043759.765568.9920@o13g2000cwo.googlegroups.com>
	<mailman.1622.1113063262.1799.python-list@python.org>
Message-ID: <1113071743.646134.218180@l41g2000cwc.googlegroups.com>

> Have you considered a 'macro' solution composing source?  If I were
handling so
> many versions, I would want a complete class definition for each
version rather
> than having to scan many sources for each implementation.

Can you elaborate on this a little ? You mean something like a
template-based code generating script that creates all the boilerplate
code for each version before you start customising it ? This could be
an option, though you'd better be pretty sure that the template is
frozen; you don't want to go back and fill in the template more than
once !

George



From skip at pobox.com  Mon Apr 11 16:35:07 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 11 Apr 2005 15:35:07 -0500
Subject: smtplib does not send to all recipients
In-Reply-To: <1113246181.843652.158520@o13g2000cwo.googlegroups.com>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>
Message-ID: <16986.57211.324056.463303@montanaro.dyndns.org>


    dccarson> I changed debuglevel to 1 and looked at the response on the
    dccarson> recipient names.  They are BOTH accepted, but still only my id
    dccarson> (d123456) receives the e-mail.  The long id (d1234567890)
    dccarson> never gets the e-mail.  Here is the excerpt of the exchange.

    ...
    dccarson> reply: '250 2.1.5 <d123456>... Recipient ok\r\n'
    ...
    dccarson> reply: '250 2.1.5 <d1234567890>... Recipient ok\r\n'

Sorta makes it look like it's not an smtplib problem, doesn't it? ;-)

Skip


From lpe at pycode.com  Thu Apr 28 20:45:02 2005
From: lpe at pycode.com (lpe)
Date: 28 Apr 2005 17:45:02 -0700
Subject: New Python website
Message-ID: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>

http://www.pycode.com

I was kinda suprised when I could not find any good sites with 3rd
party modules (other than the Vaults of Parnassus, where you must host
files elsewhere), so I decided to write one myself :)
It is brand new and might still be buggy, but hopefully it will be
usefull to some people.  Feel free to join and upload any of your code.
thanks



From vvikram at stanford.edu  Fri Apr  1 02:16:19 2005
From: vvikram at stanford.edu (Vikram)
Date: Thu, 31 Mar 2005 23:16:19 -0800
Subject: what's the use of __repr__?when shall I use it?
In-Reply-To: <mailman.1169.1112338093.1799.python-list@python.org>
References: <mailman.1169.1112338093.1799.python-list@python.org>
Message-ID: <Pine.GSO.4.44.0503312311520.26126-100000@epic19.Stanford.EDU>


__repr__ should return something that when eval'ed yields an identical
object (if possible). essentially it should represent the programmer/debug
view of the object.

__str__ should mostly return a highly user-friendly string (note: str(obj)
will use __repr__ if __str__ doesn't exist)

you might also be interested in this thread covering the same topic:
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/d10731049459726f/2a8f62f478057abd?q=python+__repr__+__str__+difference&rnum=6#2a8f62f478057abd

thanks,
			Vikram



From jason.w.kane at gmail.com  Thu Apr 14 17:21:27 2005
From: jason.w.kane at gmail.com (Kane)
Date: 14 Apr 2005 14:21:27 -0700
Subject: changing colors in python
In-Reply-To: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>
References: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>
Message-ID: <1113513687.028969.316020@o13g2000cwo.googlegroups.com>

To convert ansi escape sequences into text colors you need a terminal
that understands what you are doing.  Linux does this by default; dos
and windows do not.  You need to have an extra program in memory.  The
conventional approach is the "ANSI.SYS" driver which probably still
ships with Windows (link below).

I've included a link to nansi.com but haven't used it with any windows
version > 3.1.  If memory serves it is significantly faster.

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q101875
http://alumnus.caltech.edu/~dank/nansi/



From danb_83 at yahoo.com  Thu Apr 21 02:59:06 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 20 Apr 2005 23:59:06 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
Message-ID: <1114066746.568467.95730@z14g2000cwz.googlegroups.com>

beliavsky at aol.com wrote:

> What languages besides Python use the Python slicing convention?

Java uses it for the "substring" method of strings.

> In C starting at
> 0 may be justified because of the connection between array
subscripting
> and pointer arithmetic, but Python is a higher-level language where
> such considerations are less relevant.

Maybe less relevant, but relevant nonetheless.

First, there's the desire for familiarity.  Many Python programmers are
also C programmers, and that fact has had an influence on the
development of the language.  That's why we write "x += 0x20" rather
than "x := x + $20".  Why not array indexing as well?

More importantly, there are reasons for counting from zero that have
nothing to do with pointers.

The biggest reason involves modular arithmetic: r=n%d satifies 0 <= r <
d, which conveniently matches Python's array syntax.

   DAY_NAMES = ["Sunday", "Monday", "Tuesday", "Wednesday",
                "Thursday", "Friday", "Saturday"]
   def weekday_name(date):
      return DAY_NAMES[date.toordinal() % 7]

Modular arithmetic's preference for 0-based counting goes beyond array
indexing.  For example, consider our notation for time, from 00:00:00
to 23:59:59.

   def time_add(time, delta):
      """
      time  = an (hour, minute, second) tuple for a time of day
      delta = an (hour, minute, second) tuple for an amount of time

      Returns time+delta, as an (hour, minute, second) tuple.
      """
      hour = time[0] + delta[0]
      minute = time[1] + delta[1]
      second = time[2] + delta[2]
      # Normalize the time
      second = ((hour * 60) + minute) * 60 + second
      minute, second = divmod(second, 60)
      hour, minute = divmod(minute, 60)
      hour %= 24
      return hour, minute, second

Imagine that the time notation went from 01:01:01 to 24:60:60.  Try
writing a time_add function for that.  The only simple way I can think
of is to temporarily convert to zero-based notation!

   def time_add(time, delta):
      # Add like terms and convert to zero-based notation.
      hour = time[0] + delta[0] - 1
      minute = time[1] + delta[1] - 1
      second = time[2] + delta[2] - 1
      # Normalize the time
      second = ((hour * 60) + minute) * 60 + second
      minute, second = divmod(second, 60)
      hour, minute = divmod(minute, 60)
      hour %= 24
      # Convert back to one-based notation on output
      return hour + 1, minute + 1, second + 1

> Along the same lines, I think the REQUIREMENT that x[0] rather than
> x[1] be the first element of list x is a mistake. At least the
> programmer should have a choice, as in Fortran or VBA.

If you really want 1-based arrays, just do what most BASIC programmers
do: Ignore x[0].

>>> months = [None, "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
"Aug", "Sep", "Oct", "Nov", "Dec"]
>>> print months[4]
Apr



From tim.golden at viacom-outdoor.co.uk  Tue Apr 19 06:27:44 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 19 Apr 2005 11:27:44 +0100
Subject: Name/ID of removable Media: how?
Message-ID: <9A28C052FF32734DACB0A288A3533991EBB78A@vogbs009.gb.vo.local>

[Heiko Selber]
| I am trying to find out (using Python under windows) the name 
| of a CD that
| is currently in the drive specified by a path name.
| 
| And while I am at it, I'd also like to know whether the 
| specified drive
| contains a CD at all, and whether the drive is actually a CD drive.

Try this:

<code>
import wmi

c = wmi.WMI ()
for i in c.Win32_CDROMDrive ():
  print i.Caption, i.VolumeName, i.VolumeSerialNumber

</code>

I haven't answered all your questions, but I'm willing
to bet that you can do pretty much what you want with
WMI.

There are also the pywin32 functions which give you some
of this (maybe all, don't know; haven't tried).

More info here: http://timgolden.me.uk/python/wmi.html
and here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_cdromdrive.asp
and here: http://pywin32.sf.net

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From rschroev_nospam_ml at fastmail.fm  Tue Apr 26 07:42:39 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 26 Apr 2005 11:42:39 GMT
Subject: what is the best way to determine system OS?
In-Reply-To: <86acnln8wi.fsf@guru.mired.org>
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org> <hpivj2-lh1.ln1@lairds.us>
	<86y8b6o8pw.fsf@guru.mired.org>
	<1114487173.272526.13670@o13g2000cwo.googlegroups.com>
	<V2nbe.73933$xJ7.4988028@phobos.telenet-ops.be>
	<86acnln8wi.fsf@guru.mired.org>
Message-ID: <POpbe.74075$lL3.4833408@phobos.telenet-ops.be>

Mike Meyer wrote:
>>In that case, it seems to be a better idea to check the version of
>>vmstat that's on the system. At least, I presume that such differences
>>in behaviour can be deduced from the vmstat version string.
> 
> 
> Hmm. That doesn't seem to work here:
> 
> guru% vmstat --version
> vmstat: illegal option -- -
> usage: vmstat [-aimsz] [-c count] [-M core [-N system]] [-w wait]
>               [-n devs] [disks]

The version on Debian Woody uses -V:

$ vmstat -V
procps version 2.0.7

Apparently it is quite a different program than yours; the -V option is 
cleary labeled in the man page, and it supports much less options:

$ vmstat --help
usage: vmstat [-V] [-n] [delay [count]]
               -V prints version.
               -n causes the headers not to be reprinted regularly.
               delay is the delay between updates in seconds.
               count is the number of updates.



-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From matt at mondoinfo.com  Mon Apr 25 15:23:58 2005
From: matt at mondoinfo.com (Matthew Dixon Cowles)
Date: Mon, 25 Apr 2005 14:23:58 -0500
Subject: Is this a bug?
References: <mailman.2402.1114358128.1799.python-list@python.org>
Message-ID: <426d43cd$0$613$804603d3@auth.newsreader.iphouse.com>

On 2005-04-24 10:52:36 -0500, "Fredrik Lundh" <fredrik at pythonware.com> said:
> 
> mapping += to extend is a design mistake (I guess someone got a
> little carried away).

I agree. I think that + and += should be the same except for the target 
of the assignment. But I discussed that with the Timbot a little while 
ago and he disagrees.

Regards,
Matt



From steven.bethard at gmail.com  Wed Apr 13 11:34:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 09:34:30 -0600
Subject: sort of a beginner question about globals
In-Reply-To: <1113405724.301516.232000@f14g2000cwb.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
Message-ID: <6v-dnV7CJ7WZocDfRVn-oA@comcast.com>

fred.dixon wrote:
> how would i use the following if OPTIONS was in a module ?
> -----------------------
> from optparse import OptionParser
> 
> usage = "usage: %prog [options] arg"
> parser = OptionParser(usage)
> 
> parser.add_option("-d", "--debug", ction="store_true", dest="verbose")
> (OPTIONS = parser.parse_args()

Just have this code update the options module:

import options
...
opts, args = parser.parse_args()
options.__dict__.update(opts.__dict__)

STeVe


From adomas.paltanavicius at gmail.com  Fri Apr 22 14:12:08 2005
From: adomas.paltanavicius at gmail.com (Adomas)
Date: 22 Apr 2005 11:12:08 -0700
Subject: Python logos
Message-ID: <1114193528.576352.162680@z14g2000cwz.googlegroups.com>

Hi all,

this question has nothing to do with Python syntax,
or libraries, however...

I'm looking for the so well-known python logo -- not
the boring "Python Powered", but the image of small
snake. However, the only such I could found was 32x32
or alike (windows icon size.)

Does anybody know where could I find a better-resolution
image, or yet better SVG/EPS?

Thanks in advance,
Adomas



From fredrik at pythonware.com  Tue Apr 12 13:57:40 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 19:57:40 +0200
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com><F4CdnYojx8MiN8bfRVn-2w@comcast.com>
	<FKydnWjMkrRTaMbfRVn-3g@powergate.ca>
Message-ID: <d3h20l$i6t$1@sea.gmane.org>

Peter Hansen wrote:

> Joe Smith wrote:
> > Xah Lee wrote:
> >> of motherf***ing irrevalent drivel?
> >
> > I am greatly amused.
> > A troll impersonating Xah Lee has made xah look like a total moron.
> > LOL
>
> Sorry, Joe, but why do you think this wasn't Xah?

why do you think "Joe" and "Xah" are two different persons? ;-)

</F>





From prabapython at yahoo.co.in  Thu Apr  7 07:38:52 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Thu, 7 Apr 2005 12:38:52 +0100 (BST)
Subject: doubt regarding  main function
In-Reply-To: 6667
Message-ID: <20050407113852.51725.qmail@web8401.mail.in.yahoo.com>

Dear All,

    I have doubt regarding main function in
Python.  In Python we can create a function
and we can call a function directly.
(eg:)
def test():
    print 'main function test'
I can call this function the following way

eg) test()

So why we need the below way of calling a
function?

if __name__ == '__main__':
     test() 

What is the advantage of this way calling a
function.

Kindly mail me as early as possible

regards,
Prabahar



________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From jeremit0 at gmail.com  Fri Apr  8 14:17:32 2005
From: jeremit0 at gmail.com (jeremit0)
Date: Fri, 08 Apr 2005 14:17:32 -0400
Subject: Equivalent string.find method for a list of strings
Message-ID: <d36hnj$6h6$1@sea.gmane.org>

I have read a text file using the command

lines = myfile.readlines()

and now I want to seach those lines for a particular string.  I was 
hoping there was a way to "find" that string in a similar way as 
searching simply a simple string.  I want to do something like

lines.find.('my particular string')

Is there a module that already exists that allows me to do this or will 
I have to created my own method?
Thanks,
Jeremy



From t.bettio at transnorm.ch  Thu Apr 14 14:43:22 2005
From: t.bettio at transnorm.ch (Tiziano Bettio)
Date: Thu, 14 Apr 2005 20:43:22 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <1113490437.037734.158740@g14g2000cwa.googlegroups.com>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<1113490437.037734.158740@g14g2000cwa.googlegroups.com>
Message-ID: <425EB9CA.1010708@transnorm.ch>

martijn at gamecreators.nl wrote:

>And how do you get the data back ?
>
>1+0=0 == 0+0=0
>0+1=1 == 1+1=1
>
>let's say you have the end key : 0
>then you want to decompress it , but in what ? 0 0 or 1 0
>
>;)
>
>  
>
hi there

could someone please tell me that this thread wasn't a aprilsfoll day
joke and it is for real...

i'm pretty much able to go down to a single bit but what would be the
reverse algorithm as stated by martin...

:0



From eppstein at ics.uci.edu  Tue Apr  5 22:18:10 2005
From: eppstein at ics.uci.edu (David Eppstein)
Date: Tue, 05 Apr 2005 18:18:10 -0800
Subject: math - need divisors algorithm
References: <gXq2e.24021$IH3.1980@fe3.news.blueyonder.co.uk>
	<mailman.1111.1112246542.1799.python-list@python.org>
Message-ID: <eppstein-C057F2.18181005042005@news.service.uci.edu>

> > Does anyone have suggested code for a compact, efficient, elegant, most of
> > all pythonic routine to produce a list of all the proper divisors of an
> > integer (given a list of prime factors/powers)

I have code for this in 
<http://www.ics.uci.edu/~eppstein/numth/egypt/egypt.py>
(look for the function called, surprisingly, "divisors").

It's not very compact -- 155 lines from the start of the Pollard Rho 
factorization (thanks to Kirby Urner) to the end of the divisors 
function, but it's reasonably efficient even for largish numbers.

-- 
David Eppstein
Computer Science Dept., Univ. of California, Irvine
http://www.ics.uci.edu/~eppstein/


From rkern at ucsd.edu  Mon Apr 11 16:21:30 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 11 Apr 2005 13:21:30 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <16986.43349.305695.807402@montanaro.dyndns.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de>
	<d3c88t$r27$1@sea.gmane.org>	<200504102212.19392.hancock@anansispaceworks.com>	<d3cq4b$t9u$1@sea.gmane.org>
	<16986.43349.305695.807402@montanaro.dyndns.org>
Message-ID: <d3em2q$rno$1@sea.gmane.org>

Skip Montanaro wrote:
>     >> I guess the other thing to compare to is something like SciPy, which
>     >> is a kind of specialized distribution of Python for scientific
>     >> applications.
> 
>     Robert> No, Scipy is just a (large) package. Enthon, on the other hand,
>     Robert> is just such a distribution.
> 
> I'm sorry, you lost me there.  What's the difference between a large package
> and a distribution?

Scipy is not a "distribution of Python." It's just a single package, a 
single library; you still need the interpreter. Enthon for Windows is a 
distribution of the Python interpreter and a number of packages. 
Currently, MacEnthon is just a collection of packages because I can rely 
on the presence of Python 2.3.0 on all OSX 10.3 machines. In the future, 
I will be releasing a version for 2.4.x and that will include the 
interpreter.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From ladasky at my-deja.com  Fri Apr 22 21:35:57 2005
From: ladasky at my-deja.com (ladasky at my-deja.com)
Date: 22 Apr 2005 18:35:57 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <mailman.2261.1114129671.1799.python-list@python.org>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
	<1114122554.228545.105700@g14g2000cwa.googlegroups.com>
	<mailman.2261.1114129671.1799.python-list@python.org>
Message-ID: <1114220157.718697.133960@z14g2000cwz.googlegroups.com>

Michael Spencer wrote:
> ladasky at my-deja.com wrote:
> > I'm back...
> [wondering why copy.deepcopy barfs on array instances]
> >
>
> http://www.python.org/doc/2.3.3/lib/module-copy.html
> deepcopy:
> ...
> This version does not copy types like module, class, function,
method, stack
> trace, stack frame, file, socket, window, *array*, or any similar
types.
> ...

*smacks forehead*

Duh.  Right in the docs.  Too many late nights in front of the screeen.
 Thanks, Michael...

--
Rainforest laid low.
"Wake up and smell the ozone,"
Says man with chainsaw.
John J. Ladasky Jr., Ph.D.



From xah at xahlee.org  Tue Apr 19 06:54:29 2005
From: xah at xahlee.org (Xah Lee)
Date: 19 Apr 2005 03:54:29 -0700
Subject: New Python regex Doc (was: Python documentation moronicities)
In-Reply-To: <1113856843.023012.165500@l41g2000cwc.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1113856843.023012.165500@l41g2000cwc.googlegroups.com>
Message-ID: <1113908069.264676.207090@g14g2000cwa.googlegroups.com>

send your feedbacks to Steve Holden. (http://www.holdenweb.com/)
If he deem it proper, he will paypal me $100 bucks, and you can thank
him for the instigation and betterment of the Python doc.

Meanwhile, feel free to incorporate my edits into python doc.

 Xah
 xah at xahlee.org
? http://xahlee.org/


Xah Lee wrote:
> i have rewrote the Python's re module documentation.
> See it here for table of content page:
> http://xahlee.org/perl-python/python_re-write/lib/module-re.html
>
> The doc is broken into 4 sections:
> * regex functions (node111.html)
> * regex OOP (re-objects.html)
> * matched objects (match-objects.html)
> * regex syntax (re-syntax.html)
>
> the regex syntax page i haven't edited, except the introductory first
> paragraph. The other pages are completely rewritten for about 80%.
>
> There are a couple fine points or 3 places in the original doc i
can't
> understand. They are noted as NOTE DOC WRITERS or NEED EXAMPLE HERE.
> 
>  Xah
>  xah at xahlee.org
> ? http://xahlee.org/



From fred.dixon at gmail.com  Thu Apr 14 08:26:47 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 14 Apr 2005 05:26:47 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <DNmdnVZhutRKQMDfRVn-qg@comcast.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
Message-ID: <1113481607.615479.72920@g14g2000cwa.googlegroups.com>

when i am roughing out my functions and classes i out a pass statement
as my first line just as a place holder and a convenient place to put a
break when i am testing. no other good reason.



From discard at dawes.za.net  Fri Apr 15 03:57:54 2005
From: discard at dawes.za.net (Rogan Dawes)
Date: Fri, 15 Apr 2005 09:57:54 +0200
Subject: Web Application Client Module
In-Reply-To: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
Message-ID: <d3ns63$fpr$1@server4.gts.cz>

Raffi wrote:
> Hi All,
> 
> I hope I'm posting this question to the correct newsgroups. We have a
> web based database application that's accessed using IE. The
> application opens a popup window to run in. With all the popup blockers
> and compromised browsers out there, I'm looking into developing a web
> based custom client side application to access the application with.
> The application will be developed to only reach the web application
> site using the https protocol. It also needs to javascript enabled. It
> will be downloaded from the main web site and used to access the
> database application.
> 
> Any suggestions/ideas on how to go about developing the client
> application? What tools tools are out there for such a project.
> 
> Thanks,
> Raffi
> 

Wouldn't it be easier simply to make it NOT open a pop-up window? 
Besides, most browsers usually allow you to whitelist a site, or allow a 
single pop-up per click . . .

Rogan
-- 
Rogan Dawes

*ALL* messages to discard at dawes.za.net will be dropped, and added
to my blacklist. Please respond to "nntp AT dawes DOT za DOT net"


From gsakkis at rutgers.edu  Mon Apr 25 22:45:30 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 19:45:30 -0700
Subject: Quote-aware string splitting
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
	<87oec2e1qa.fsf@mrbun.watterson>
	<1114483065.551933.68460@f14g2000cwb.googlegroups.com>
Message-ID: <1114483530.128707.297530@z14g2000cwz.googlegroups.com>

> import re
> regex = re.compile(r'''
>                    '.*?' |  # single quoted substring
>                    ".*?" |  # double quoted substring
>                    \S+      # all the rest
>                    ''', re.VERBOSE)

Oh, and if your strings may span more than one line, replace re.VERBOSE
with re.VERBOSE | re.DOTALL.

George



From mahs at telcopartners.com  Mon Apr 18 16:28:21 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 18 Apr 2005 13:28:21 -0700
Subject: def a((b,c,d),e):
In-Reply-To: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
Message-ID: <d4150k$l4q$1@sea.gmane.org>

AdSR wrote:
> Fellow Pythonistas,
> 
> Please check out
> 
> http://spyced.blogspot.com/2005/04/how-well-do-you-know-python-part-3.html
> 
> if you haven't done so yet. It appears that you can specify a function
> explicitly to take n-tuples as arguments. It actually works, checked
> this myself. If you read the reference manual at
> http://docs.python.org/ref/function.html
> really carefully, you will find that it is indeed part of the language
> spec, but it's a likely candidate for the least advertised Python
> feature. 
> 
See also the source of inspect.getargs for just how much this complicates the 
argument-passing logic!

 > Small wonder since it looks like one of those language
 > features that make committing atrocities an order of magnitude easier.
 >
 > Has anyone actually used it in real code?

It appears in a handful of places in the stdlib, mostly tests:
#Search C:\Python23\Lib
# Files *.py
#   For def [\w]+\(\(
c:\python23\lib\test\test_compile.py(49)         def comp_args((a, b)):
c:\python23\lib\test\test_compile.py(53)         def comp_args((a, b)=(3, 4)):
c:\python23\lib\test\test_grammar.py(159) def f5((compound, first), two): pass
c:\python23\lib\test\test_scope.py(318) def makeAddPair((a, b)):
c:\python23\lib\test\test_scope.py(319)     def addPair((c, d)):
c:\python23\lib\site-packages\wx-2.5.3-msw-ansi\wx\lib\imageutils.py(36) def 
makeGray((r,g,b), factor, maskColor):
c:\python23\lib\cgitb.py(82) def html((etype, evalue, etb), context=5):
c:\python23\lib\cgitb.py(168) def text((etype, evalue, etb), context=5):
c:\python23\lib\urlparse.py(118) def urlunparse((scheme, netloc, url, params, 
query, fragment)):
c:\python23\lib\urlparse.py(127) def urlunsplit((scheme, netloc, url, query, 
fragment)):

 >
 > Cheers,
 >
 > AdSR



From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 17 10:28:13 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 17 Apr 2005 16:28:13 +0200
Subject: unicode "em space" in regex
In-Reply-To: <1113744266.026254.183300@o13g2000cwo.googlegroups.com>
References: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>
	<4261442D.1010800@v.loewis.de>
	<1113744266.026254.183300@o13g2000cwo.googlegroups.com>
Message-ID: <3cf6gsF6lp5ilU1@individual.net>

Xah Lee wrote:

> "Regular expression pattern strings may not contain null bytes, but can
> specify the null byte using the \number notation."
> 
> What is meant by null bytes here? Unprintable chars?? and the "\number"
> is meant to be decimal? and in what encoding?

The null byte is a byte with the integer value 0. Difficult, isn't it.

The \number notation is, as you could read in http://docs.python.org/ref/strings.html,
octal.

Reinhold


From aleksander.helgaker at gmail.com  Fri Apr 22 11:04:06 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 22 Apr 2005 08:04:06 -0700
Subject: Overiding error message when using a python program
In-Reply-To: <mailman.2287.1114181799.1799.python-list@python.org>
References: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
	<mailman.2287.1114181799.1799.python-list@python.org>
Message-ID: <1114182246.383968.146810@l41g2000cwc.googlegroups.com>

Thanks, this works great.

I edited def prompt_user() so that it now reads

<code>
def prompt_user():
	try:
		userinput = input(">")
	except NameError:
		print "Command not recognised"
</code>



From mirnazim at gmail.com  Wed Apr 27 03:39:52 2005
From: mirnazim at gmail.com (Mir Nazim)
Date: 27 Apr 2005 00:39:52 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1114503432.227799.52670@o13g2000cwo.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
Message-ID: <1114587592.260950.181990@l41g2000cwc.googlegroups.com>

Thanks fro ur advice.
I was also thinking to look into quixote.
but wanted a second opinion.
thanks again.



From dbasch at yahoo.com  Fri Apr  8 18:21:01 2005
From: dbasch at yahoo.com (Derek Basch)
Date: 8 Apr 2005 15:21:01 -0700
Subject: Counting iterations
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
Message-ID: <1112998861.316958.152060@g14g2000cwa.googlegroups.com>

ooops you are right. Should have been:

pets = ["cat", "dog", "bird"]
num_pets = 0
for i in pets:
    num_pets += 1
    print "pet" + "#" + num_pets

That's the problem with one offs. I don't read them :).



From pdemb at gazeta.pl  Tue Apr 19 13:01:37 2005
From: pdemb at gazeta.pl (Peter Dembinski)
Date: Tue, 19 Apr 2005 19:01:37 +0200
Subject: Refactoring in Python.
Message-ID: <8764yiog3y.fsf@hector.domek>


I am trying to write Master Thesis on refactoring Python code.

Where should I look for information?

-- 
http://www.dembi?ski.prv.pl 


From codecraig at gmail.com  Fri Apr 15 11:30:12 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 08:30:12 -0700
Subject: py2exe - create one EXE
Message-ID: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>

Hi,
  Is there a way to create one .exe using py2exe (or some other
extension/utility that can do it)?

  Basically i want to generate one .exe that contains everything my
python app needs to run instead of having a .exe, some .zips, etc.

thanks



From leszczynscy at nospamyahoo.com  Tue Apr 26 22:50:00 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Tue, 26 Apr 2005 21:50:00 -0500
Subject: How remove directories with the content in the platform
 independent way?
In-Reply-To: <7_adnZPgfvQeYfPfRVn-rg@comcast.com>
References: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>
	<mailman.2555.1114569257.1799.python-list@python.org>
	<7_adnZPgfvQeYfPfRVn-rg@comcast.com>
Message-ID: <7_adnZLgfvS1YPPfRVn-rg@comcast.com>

Andy Leszczynski wrote:
> James Stroud wrote:
> 
>> Look at the os and os.path modules.
>>
>> http://docs.python.org/lib/module-os.html
>> http://docs.python.org/lib/module-os.path.html
>>
>>
>>
>> On Tuesday 26 April 2005 07:27 pm, so sayeth Andy Leszczynski:
>>
>>> How remove directories with the content in the platform independent way?
>>> Is the API for that?
>>>
>>> Thx, A.
>>
>>
>>
> It is not clear if rmdir would remove the non-empty dir ...
> 
never min, I found this in that doc :-)

# Delete everything reachable from the directory named in 'top',
# assuming there are no symbolic links.
# CAUTION:  This is dangerous!  For example, if top == '/', it
# could delete all your disk files.
import os
for root, dirs, files in os.walk(top, topdown=False):
     for name in files:
         os.remove(os.path.join(root, name))
     for name in dirs:
         os.rmdir(os.path.join(root, name))



From skip at pobox.com  Wed Apr 27 22:39:45 2005
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 27 Apr 2005 21:39:45 -0500
Subject: regex over files
In-Reply-To: <426F5B62.3010801@chamonix.reportlab.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
	<426EAA9D.2050904@jessikat.fsnet.co.uk>
	<pan.2005.04.26.21.39.15.988504@jerf.org>
	<426F5B62.3010801@chamonix.reportlab.co.uk>
Message-ID: <17008.19697.939514.53469@montanaro.dyndns.org>


    Robin> I implemented a simple scanning algorithm in two ways. First buffered scan 
    Robin> tscan0.py; second mmapped scan tscan1.py.

    ...

    Robin> C:\code\reportlab\demos\gadflypaper>\tmp\tscan0.py dingo.dat
    Robin> len=139583265 w=103 time=110.91

    Robin> C:\code\reportlab\demos\gadflypaper>\tmp\tscan1.py dingo.dat
    Robin> len=139583265 w=103 time=140.53

I'm not sure why the mmap() solution is so much slower for you.  Perhaps on
some systems files opened for reading are mmap'd under the covers.  I'm sure
it's highly platform-dependent.  (My results on MacOSX - see below - are
somewhat better.)

Let me return to your original problem though, doing regex operations on
files.  I modified your two scripts slightly:

tscan0.py:

    import sys, time, re
    fn = sys.argv[1]
    f=open(fn,'rb')
    n=0
    t0 = time.time()
    while 1:
         buf = f.read(4096)
         if not buf: break
         for i in re.split("XXXXX", buf):
             n += 1
    t1 = time.time()

    print "n=%d time=%.2f" % (n, (t1-t0))

tscan1.py:

    import sys, time, mmap, os, re
    fn = sys.argv[1]
    fh=os.open(fn,os.O_RDONLY)
    s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
    t0 = time.time()
    n = 0
    for mat in re.split("XXXXX", s):
        n += 1
    t1 = time.time()

    print "n=%d time=%.2f" % (n, (t1-t0))

The mmap version is almost obviously correct, assuming what we want to do is
split the file on "XXXXX".  The buffered read version is almost certainly
incorrect, given our understanding that corner cases lurk at buffer
boundaries.

I took the file from Bengt Richter's example and replicated it a bunch of
times to get a 122MB file.  I then ran the above two programs against it:

    % python tscan1.py splitX
    n=2112001 time=8.88
    % python tscan0.py splitX
    n=2139845 time=10.26

So the mmap'd version is within 15% of the performance of the buffered read
version and we don't have to solve the problem of any corner cases (note the
different values of n).  I'm happy to take the extra runtime in exchange for
simpler code.

Skip


From raoul.daruwala at gmail.com  Tue Apr 26 14:51:36 2005
From: raoul.daruwala at gmail.com (raoul)
Date: 26 Apr 2005 11:51:36 -0700
Subject: Fast plotting?
In-Reply-To: <rowen-608060.09385226042005@gnus01.u.washington.edu>
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
Message-ID: <1114541496.010129.280700@z14g2000cwz.googlegroups.com>

I like Ploticus. It's a bit kludgy for integration, you need to send
the data to a file and have ploticus read it, but this can be easily
done using memory mapped files. It's a very fast package and it
produces very nice plots. SVG plots too. We use an svg viewer and then
reload the svg tree to rerender the plot.



From Scott.Daniels at Acm.Org  Wed Apr 20 11:26:13 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 20 Apr 2005 08:26:13 -0700
Subject: Array of Chars to String
In-Reply-To: <4265a3c8.14451179@news.oz.net>
References: <mailman.2133.1113942800.1799.python-list@python.org>	<42658990.7739398@news.oz.net>
	<d443t0$tg8$1@sea.gmane.org>
	<mailman.2140.1113955187.1799.python-list@python.org>
	<4265a3c8.14451179@news.oz.net>
Message-ID: <42666ee2$1@nntp0.pdx.net>

Bengt Richter wrote:
> ... BTW, since str has .translate, why not .maketrans?
Probably because, while I can imagine u'whatever'.translate using a
256-wide table (and raising exceptions for other the rest), I have
more problems imagining the size of the table for a UCS-4 unicode
setup (32 bits per character).  I suppose it could be done, but a
na?ve program might be in for a big shock about memory consumption.

--Scott David Daniels
Scott.Daniels at Acm.Org


From m at m.com  Fri Apr 29 03:51:33 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 15:51:33 +0800
Subject: why "import wx" doesn't work?
References: <427126ca$1_3@rain.i-cable.com>
	<VDcce.981$PA3.377@newssvr31.news.prodigy.com>
	<42715a8b$1_1@rain.i-cable.com> <d4rrcn$a9l$1@nemesis.news.tpi.pl>
Message-ID: <4271e783$1_2@rain.i-cable.com>

Bright ( ; You show me a crystal clear explaination.
As a newbie in python and even oop, I find the python documentation is not
easy to figure out. That's great with you guys so nice here.

> This is very good! wxApp is never defined if you use "import wx". You
> must use "wx.wxApp" instead.
>
> If you import a module using "import anything", then all the names
> imported from the module must begin with "anything.". If you import wx
> using "import wx", then ALL the wx commands, classes and variables
> (all the names) MUST begin with 'wx.". Change them, and your program
> will work.
>
> "from wx import *" is a special shortcut, allowing you to use all the
> names without "wx.". If you change "from something import *" to
> "import something", your code will always break, this is normal.
>
> regards,
> Filip Dreger
>
>




From simon.brunning at gmail.com  Fri Apr 22 10:56:33 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 22 Apr 2005 15:56:33 +0100
Subject: Overiding error message when using a python program
In-Reply-To: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
References: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
Message-ID: <8c7f10c6050422075620c5e59b@mail.gmail.com>

On 22 Apr 2005 07:45:40 -0700, aleksander.helgaker at gmail.com > I'm
creating this program for my own use but naturally sometimes I
> would make spelling mistakes (being a dyslexic and all) and so having a
> long error message and having the program quit is more then a bit
> irritating. It would be much more preferable if the program simply
> wrote "Command not recognised" and then kept going. Is this possible?

It certainly is. "NameError" is what's called an exception, and you
can catch those. Try something like (untested):

try:
    print 10 / pi
except NameError:
    print "Command not recognised"

I can't see where you'd want that in your code, 'cos I can't see where
you are actually processing the user's input.

For more on exceptions, see <http://docs.python.org/tut/node10.html>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From tim.golden at viacom-outdoor.co.uk  Fri Apr 15 10:06:57 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Fri, 15 Apr 2005 15:06:57 +0100
Subject: Get OS name
Message-ID: <9A28C052FF32734DACB0A288A3533991EBB777@vogbs009.gb.vo.local>

[rbt]
| 
| codecraig wrote:
| > How can I get the OS Name, such as "Windows XP Pro".  I 
| know I can do
| > 
| > sys.getwindowsversion but that doesnt return a nice Windows XP Pro
| > string.
| > 
| > and os.name gives "nt"
| > 
| > thanks.
| > 
| 
| Read the docs... sys.getwindowsversion() should do the trick. AFAIK, 
| there is no way to differentiate between XP Home and Pro...

I'm no expert on this (I don't even use XP) but the WMI
Win32_OperatingSystem class seems to give a useful string
here:

<code>
import wmi

c = wmi.WMI ()
for os in c.Win32_OperatingSystem ():
  print os.Caption

</code>

gives "Microsoft Windows XP Professional" and 
"Microsoft Windows 2000 Professional" on a couple
of machines I tried.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From jstroud at mbi.ucla.edu  Fri Apr 15 01:03:17 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 14 Apr 2005 22:03:17 -0700
Subject: question about functions
In-Reply-To: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
References: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
Message-ID: <200504142203.17408.jstroud@mbi.ucla.edu>

Oops, I messed up the indices on the previous post.
Also, maybe you are thinking a bit more perlish:

# start of ascript

def my_funk(*alist):
  print "the first argument: %s" % alist[0]
  print "the second argument: %s" % alist[1]

my_funk('wuzzup,','g?')

# end of ascript

On Thursday 14 April 2005 09:44 pm, chris patton wrote:
> Hi everyone.
>
> I have a question about passing arguments to python functions. Is there
> any way to make this job act like Perl?
>
> sub my_funk {
>
> print "the first argument: $_[0]\n";
> print "the second argument: $_[1]\n";  }
>
> In other words, can I call the arguments from a list?

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

http://www.jamesstroud.com/


From simon.brunning at gmail.com  Wed Apr 20 08:39:51 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 13:39:51 +0100
Subject: building a small calculator
In-Reply-To: <1114000275.227950.50870@f14g2000cwb.googlegroups.com>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
	<mailman.2168.1113999910.1799.python-list@python.org>
	<1114000275.227950.50870@f14g2000cwb.googlegroups.com>
Message-ID: <8c7f10c605042005393c9d0219@mail.gmail.com>

On 20 Apr 2005 05:31:15 -0700, aleksander.helgaker at gmail.com
<aleksander.helgaker at gmail.com> wrote:
> I get the following error message when using the command sys.exit().
> 
> name 'sys' is not defined.

You really are new at this, aren't you? ;-) You need to import the sys
module before you use it. Put this at the top of your script:

import sys

I'd also suggest that you have a run through the tutorial -
<http://docs.python.org/tut/>. It's time well spent. If you don't get
on with that, there's another couple of tutorials available aimed
directly at those new to programming -
<http://www.livewires.org.uk/python/> and
<http://www.ibiblio.org/obp/thinkCSpy/>.

Lastly, although neophytes are more than welcome here, you might find
the tutor mailing list a good place to ask questions in the early days
of your Python experience. You'll find it here -
<http://mail.python.org/mailman/listinfo/tutor>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From Scott.Daniels at Acm.Org  Tue Apr 12 14:12:03 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 12 Apr 2005 11:12:03 -0700
Subject: problem with the logic of read files
In-Reply-To: <68da8$425bf954$43461874$29054@nf1.news-service.com>
References: <68da8$425bf954$43461874$29054@nf1.news-service.com>
Message-ID: <425c09f8$1@nntp0.pdx.net>

m_tach at yahoo.com wrote:
> #!/cbi/prg/python/current/bin/python
> # -*- coding: iso-8859-1 -*-
> import sys
> import os
> from progadn import *
> ...
> for x in extseq:
>      f = open(x, "r")
>      seq=f.read()
>      f.close()
>      s=seq
> 
> def checkDNA(seq):
>     ...
> 
> seq=checkDNA(seq)
> print seq

You terminated the loop to define checkDNA.

What you want is:
     ...
     from progadn import *
     def checkDNA(seq):
         ...

     ...
     for x in extseq:
         f = open(x, "r")
         seq=f.read()
         f.close()
         s=seq
         seq = checkDNA(seq)
         print seq

Even better might be:
     ...
     from progadn import *
     def checkDNA(seq):
         ...

     def main():
         ...
         for x in extseq:
             f = open(x, "r")
             try:
                 print checkDNA(f.read())
             finally:
                 f.close()


     if __name__ = '__main__':
         main()

--Scott David Daniels
Scott.Daniels at Acm.Org


From lbates at syscononline.com  Wed Apr 27 17:09:47 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 27 Apr 2005 16:09:47 -0500
Subject: interactive web graphics
In-Reply-To: <mailman.2600.1114635374.1799.python-list@python.org>
References: <mailman.2600.1114635374.1799.python-list@python.org>
Message-ID: <I7idnXNu8tQfYvLfRVn-2A@comcast.com>

Web application are different than local or client
server applications.  Web browser can connect to a
server and make a request, but the program that
satisfies the request runs to completion and disconnects
from the client.  You cannot easily do interactive-type
applications.  Things like progress bars can't really
even be done.  You can have your applications create
graphs, charts, etc. and deliver them back to the user
either as web pages or as PDF files.  There is a python
toolkit called ReportLab that provides a framework to
do this from python programs that run on the server.
The ReportLab graphics can do barcharts, line charts,
scatter plots, etc. and you can either save as .JPG
files that can be delivered on a web page or as a .PDF
file that the user can download.  Hard to say which
would work best for you.

Hope information helps a little.

-Larry Bates

Eckhoff, Michael A wrote:
> Hello,
> 
> I failed to locate a list for pygtk, so I thought I'd
> ask my question here. Is it possible to write CGI
> scripts that bring up a GUI (as in GTK+, QT, Tk, ...)
> or an openGL display that is windowed inside a web
> browser?
> 
> The answer would seem to me to be no, since the
> client could be Windows or Linux. I'd like to
> display some pretty graphics (scientific visualisation),
> but web applications are not my background.
> 
> I would like a form with progress bars, but I guess
> that would have to be implemented in some special way.
> Sorry if these questions are ill-posed; I am just
> getting my feet wet with python.
> 
> Thanks,
> Michael E
> 
> PS Congratulations for having such wonderful documentation
> on all things python. 


From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 24 10:36:50 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 24 Apr 2005 16:36:50 +0200
Subject: postgresql modules and performance
In-Reply-To: <mailman.2393.1114344513.1799.python-list@python.org>
References: <mailman.2393.1114344513.1799.python-list@python.org>
Message-ID: <3d1pbpF6rmccaU1@individual.net>

Mage wrote:
>           Hello,
> 
> I started to write my PostgreSQL layer. I tried pyPgSQL and PyGreSQL. I
> made a *very minimal* performance test and comparsion with the same
> thing in php. Table "movie" has 129 record and many fields.
> 
> I found PyGreSQL / DB-API / fetchall horrible slow (32 sec in my test).
> PHP did 13 secs and it gave the result in associative array. Maybe I did
> something bad.

Have you tried psycopg?

Reinhold


From mahs at telcopartners.com  Sun Apr  3 18:07:13 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 03 Apr 2005 15:07:13 -0700
Subject: Help me dig my way out of nested scoping
In-Reply-To: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
Message-ID: <d2ppdh$imk$1@sea.gmane.org>

Brendan wrote:
> Hi everyone
> 
> I'm new to Python, so forgive me if the solution to my question should
> have been obvious. 

...
Good question.  For a thorough explanation see: 
http://www.python.org/dev/doc/devel/ref/naming.html

Simple version follows:
> 
> OK, here's my problem:  How do I best store and change lastX, A(lastX)
> and B(lastX) in FW's scope?  This seems like it should be easy, but I'm
> stuck.  Any help would be appreciated!

Assignments (i.e., binding names to objects) are always made in the local scope 
(unless you've used the 'global' declaration, which I don't think can help you 
here).  So, for an even simpler demonstration of the problem see:
> 
  >>> def outer():
  ...     b = 1
  ...     def inner():
  ...         b += 1
  ...         print b
  ...     inner()
  ...
  >>> outer()
  Traceback (most recent call last):
    File "<input>", line 1, in ?
    File "<input>", line 6, in outer
    File "<input>", line 4, in inner
  UnboundLocalError: local variable 'b' referenced before assignment

The solution is not to re-bind the identifier from the enclosing scope, but 
rather to mutate the object that it references.  This requires a mutable object, 
such as a list:

  >>> def outer():
  ...     b = [1] # bind b to a mutable object
  ...     def inner():
  ...         b[0] += 1
  ...         print b[0]
  ...     inner()
  ...
  >>> outer()
  2
  >>>



HTH
Michael



From roy at panix.com  Sun Apr  3 08:37:01 2005
From: roy at panix.com (Roy Smith)
Date: Sun, 03 Apr 2005 08:37:01 -0400
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <7x3bu8t7or.fsf@ruckus.brouhaha.com>
Message-ID: <roy-057ED9.08370103042005@reader1.panix.com>

In article <7x3bu8t7or.fsf at ruckus.brouhaha.com>,
 Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> "Raymond Hettinger" <vze4rx4y at verizon.net> writes:
> > When writing a large suite, you quick come to appreciate being able
> > to use assert statements with regular comparision operators, debugging
> > with normal print statements, and not writing self.assertEqual over and
> > over again.  The generative tests are especially nice.
> 
> But assert statements vanish when you turn on the optimizer.  If
> you're going to run your application with the optimizer turned on, I
> certainly hope you run your regression tests with the optimizer on.

That's an interesting thought.  In something like C++, I would never think 
of shipping anything other than the exact binary I had tested ("test what 
you ship, ship what you test").  It's relatively common for turning on 
optimization to break something in mysterious ways in C or C++.  This is 
both because many compilers have buggy optimizers, and because many 
programmers are sloppy about depending on uninitialized values.

But, with something like Python (i.e. high-level interpreter), I've always 
assumed that turning optimization on or off would be a much safer 
operation.  It never would have occurred to me that I would need to test 
with optimization turned on and off.  Is my faith in optimization misguided?

Of course, all of the Python I write is for internal use; I haven't yet 
been able to convince an employer that we should be shipping Python to 
customers.


From klaus at seistrup.dk  Mon Apr 18 13:24:05 2005
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Mon, 18 Apr 2005 17:24:05 +0000 (UTC)
Subject: Removing dictionary-keys not in a set?
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
Message-ID: <slrnd67r9l.fc3.klaus@main.szn.dk>

Tim N. van der Leeuw wrote:

> I'd like to remove keys from a dictionary, which are not found
> in a specific set. So it's kind of an intersection-operation.

How about

#v+

klaus at home:~ $ python
Python 2.4.1 (#2, Mar 30 2005, 21:51:10)
[GCC 3.3.5 (Debian 1:3.3.5-8ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> d1 = {1:'a', 2:'b', 3:'c', 4:'d', 5:'e'}
>>> s1 = set(d1)
>>> s1
set([1, 2, 3, 4, 5])
>>> s2 = set([1, 3, 5])
>>> s1-s2
set([2, 4])
>>> for k in s1-s2:
...     del d1[k]
... 
>>> d1
{1: 'a', 3: 'c', 5: 'e'}
>>> ^D
klaus at home:~ $ 

#v-

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From walter at livinglogic.de  Mon Apr 25 10:08:43 2005
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Mon, 25 Apr 2005 16:08:43 +0200
Subject: HTML cleaner?
In-Reply-To: <d4ihp0$4sa$1@bagan.srce.hr>
References: <d4h9uv$cge$1@bagan.srce.hr>	<mailman.2433.1114417769.1799.python-list@python.org>
	<d4ihp0$4sa$1@bagan.srce.hr>
Message-ID: <426CF9EB.5060008@livinglogic.de>

Ivan Voras wrote:
> M.-A. Lemburg wrote:
> 
>> Not true: mxTidy integrates tidy as C lib. It's not an interface
>> to the command line tool.
> 
> Thanks, I'll look at it again!

Another option might be the HTML parser (libxml2.htmlReadMemory()) from 
libxml2 (http://www.xmlsoft.org)

Bye,
    Walter D?rwald


From grante at visi.com  Fri Apr 22 15:07:16 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 19:07:16 -0000
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
Message-ID: <116iir4hq8muc62@corp.supernews.com>

On 2005-04-22, Mage <mage at mage.hu> wrote:

> I am flirting with the idea of developing a gui app in python
> as a newbie. Which module should I use? I have noticed that
> wxpython is already installed on my gentoo and the examples on
> their wiki looks easy. Is it okay or should I use wax or
> something else?

If you need portability, then wxPython is hard to beat.
wxPython is a bit complex -- it took me a while to grasp the
concept of separate trees/hierarchies for widget layout and for
widget ownership.  Though there are a few situations where it
could be useful (I've never run across any of them in my apps),
the whole ID scheme seems pretty clunky. Wax unifies the two
trees so it's simpler to learn (it's more like Tk).

Sizers in wxPython feel a log like hbox/vbox layout from TeX,
so I like that.

The Gtk port of Python is pretty decent as well, but
portability to Windows and Mac isn't as good.

I've never tried Qt.

-- 
Grant Edwards                   grante             Yow!  Will the third world
                                  at               war keep "Bosom Buddies"
                               visi.com            off the air?


From max2 at fisso.casa  Sat Apr  2 11:05:10 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 02 Apr 2005 16:05:10 GMT
Subject: instance name
In-Reply-To: <5jz3e.504252$w62.286883@bgtnsc05-news.ops.worldnet.att.net>
References: <99z3e.1157607$35.42889387@news4.tin.it>
	<5jz3e.504252$w62.286883@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <Woz3e.1157665$35.42893113@news4.tin.it>

Andrew Koenig wrote:
> "max(01)*" <max2 at fisso.casa> wrote in message 
> news:99z3e.1157607$35.42889387 at news4.tin.it...
> 
> 
>>is there a way to define a class method which prints the instance name?
> 
> 
> The term "the instance name" is misleading, because it assumes, without 
> saying so explicitly, that every instance has a unique name.
> 
> In fact, there is no reason that an instance needs to have a name at all, or 
> that it should have only one.
> 
> You gave this example:
> 
>     instance_1 = class_1()
>     instance_1.myName()
> 
> but what if I did this instead?
> 
>     class_1().myName()
> 
> Or this?
> 
>     instance_1 = class_1()
>     instance_2 = instance_1
>     instance_2.myName()
> 
> 

excellent points.

i'll get back with proper questions afterwards.

thanks

macs


From michele.simionato at gmail.com  Wed Apr 27 03:44:06 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 27 Apr 2005 00:44:06 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1114587592.260950.181990@l41g2000cwc.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
	<1114587592.260950.181990@l41g2000cwc.googlegroups.com>
Message-ID: <1114587846.011299.125420@g14g2000cwa.googlegroups.com>

I would also look at CherryPy, the new 2.0 version seems pretty
interesting
(I have not tried it, but I have seen a short presentation at the ACCU
conference,
and it looks really trivial to use).



From bill.mill at gmail.com  Wed Apr 13 09:16:37 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 13 Apr 2005 09:16:37 -0400
Subject: preallocate list
In-Reply-To: <797fe3d40504130611dbf2ffe@mail.gmail.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
	<797fe3d40504130611dbf2ffe@mail.gmail.com>
Message-ID: <797fe3d4050413061618086ba@mail.gmail.com>

Just a correction:

<snip>
> I would profile your app to see that it's your append which is taking
> ages, but to preallocate a list of strings would look like:
> 
> ["This is an average length string" for i in range(approx_length)]
> 
> My guess is that it won't help to preallocate, but time it and let us
> know. A test to back my guess:
> 
> import timeit, math
> 
> def test1():
>     lst = [0 for i in range(100000)]
>     for i in xrange(100000):
>         lst[i] = math.sin(i) * i
> 
> def test2():
>     lst = []
>     for i in xrange(100000):
>         lst.append(math.sin(i) * i)
> 
> t1 = timeit.Timer('test1()', 'from __main__ import test1')
> t2 = timeit.Timer('test2()', 'from __main__ import test2')
> print "time1: %f" % t1.timeit(100)
> print "time2: %f" % t2.timeit(100)
> 

The results change slightly when I actually insert an integer, instead
of a float, with lst[i] = i and lst.append(i):

09:14 AM ~$ python test.py
time1: 3.352000
time2: 3.672000

The preallocated list is slightly faster in most of my tests, but I
still don't think it'll bring a large performance benefit with it
unless you're making a truly huge list.

I need to wake up before pressing "send".

Peace
Bill Mill


From sm.synonymous at gmail.com  Fri Apr 22 03:56:46 2005
From: sm.synonymous at gmail.com (Synonymous)
Date: 22 Apr 2005 00:56:46 -0700
Subject: Pattern Matching Given # of Characters and no String Input;
	use RegularExpressions?
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
Message-ID: <ae0b1ff7.0504212356.412ad197@posting.google.com>

Hello!

I was trying to create a program to search for the largest common
subsetstring among filenames in a directory, them move the filenames
to the substring's name.  I have succeeded, with help, in doing so and
here is the code.

Thanks for your help!

--- Code ---

#This program was created with feed back from: smeghead and sirup plus
aum of I2P; and also tiissa and John Machin of comp.lang.python
#Thank you very much.
#I still get the odd error in this, but it was 1 out of 2500 files
successfully sorted.  Make sure you have a directory under c:/test/
called 'aa' and have your
#I release this code into the public domain :o), send feed back to
sm.synonymous at gmail.com
files in c:/test/
import pickle
import os
import shutil
os.chdir ( '/test')
aaaa=2
aa='aa'
x=0
y=20
while y <> 2:
    print y
    List = []
    for fileName in os.listdir ( '/test/' ):
        Directory = fileName
        List.append(Directory)
    List.append("A111111111111")
    List.sort()
    List.append("Z111111111111")
    ListLength = len(List) - 1
    x = 0
    while x < ListLength:
        ListLength = len(List) - 1
        b = List[x]
        c = List[x + 1]
        backward1 = List[x - 1]
        d = b[:y]
        e = c[:y]
        backward2 = backward1[:y]
        f = str(d)
        g = str(e)
        backward3 = str(backward2)
        if f==g:
            if os.path.isdir (aa+"/"+f) == True:
                shutil.move(b,aa+"/"+f)
            else:
                os.mkdir(aa+"/"+f)
                #os.mkdir(f)
                shutil.move(b,aa+"/"+f)
        else:
            if f==backward3:
                if os.path.isdir (aa+"/"+f) == True:
                    shutil.move(b,aa+"/"+f)
                else:
                    os.mkdir(aa+"/"+f)
                    #os.mkdir(f)
                    shutil.move(b,aa+"/"+f)
            else:
                aaaa=3
        x = x + 1
    y = y - 1

--- End Code ---

sm.synonymous at gmail.com (Synonymous) wrote in message news:<ae0b1ff7.0504170134.66a01b0c at posting.google.com>...
> Hello,
> 
> Can regular expressions compare file names to one another. It seems RE
> can only compare with input i give it, while I want it to compare
> amongst itself and give me matches if the first x characters are
> similiar.
> 
> For example:
> 
> cccat
> cccap
> cccan
> dddfa
> dddfg
> dddfz
> 
> Would result in the 'ddd' and the 'ccc' being grouped together if I
> specified it to look for a match of the first 3 characters.
> 
> What I am trying to do is build a script that will automatically
> create directories based on duplicates like this starting with say 10
> characters, and going down to 1.  This way "Vacation1.jpg,
> Vacation2.jpg" would be sent to its own directory (if i specifiy the
> first 8 characters being similiar) and "Cat1.jpg, Cat2.jpg" would
> (with 3) as well.
> 
> Thanks for your help and interest!
> 
> S M


From bvande at po-box.mcgill.ca  Fri Apr 22 03:25:32 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Fri, 22 Apr 2005 03:25:32 -0400
Subject: time.strftime in 2.4.1 claims data out of range when not
In-Reply-To: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
References: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
Message-ID: <4268A6EC.2020108@po-box.mcgill.ca>

Sheila King said unto the world upon 2005-04-22 02:45:
> I have a web app that has been running just fine for several months under 
> Python 2.2.2.
> 
> We are preparing to upgrade the server to run Python 2.4.1.
> 
> However, part of my web app is throwing an error on this code (that has 
> previously worked without exception):
> 
> 
>>>>time.strftime("%Y-%m-%d", (Y, M, D, 0,0,0,0,0,0))
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: day of year out of range
> 
>>>>Y
> 
> 2005
> 
>>>>M
> 
> 5
> 
>>>>D
> 
> 15L
> 
> 
> I don't see what parts of the date that I have submitted to strftime are out 
> of range?
> 
> Also, the phrasing of the error message is a bit odd?
> "day of year out of range"
> 
> I'm not sure what the
> day of a year
> 
> would be???
> 
> Sheila King
> http://www.thinkspot.net/sheila/
> 
> 

The day of the year is the ordinal number of the day, counting from 
Jan. 1st. So, Feb. 1st is the 32nd day, Dec 31 the 365/6 (depending on 
leap year).

The docs for the time module indicate that the 8th (counting from 1) 
position of a struct_time is the day of the year, and that it can 
range from 1-366. So, naturally, the 0 value in your 8th position is 
the problem.

That does leave the mystery of why your code worked on 2.2.2; I've no 
idea. The docs do seem to indicate that there were a number of changes 
at 2.2, though.

Best,

Brian vdB


From RonGrossi382685 at yahoo.com  Tue Apr 19 11:41:23 2005
From: RonGrossi382685 at yahoo.com (RonGrossi382685 at yahoo.com)
Date: 19 Apr 2005 08:41:23 -0700
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 142)
Message-ID: <1113925283.115755.202120@f14g2000cwb.googlegroups.com>


The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrongdoing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

Jesus said "I am the way, the truth and
the life: no one can come to the
Father(God)(in Heaven), but by me."
(John 14:6)

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi

*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!

____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.browser.to/jesus-animation

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.biblegateway.com


____________________________________________________



From fredrik at pythonware.com  Tue Apr 12 02:28:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 08:28:21 +0200
Subject: Module for handling Nested Tables in HTML
References: <a3cc95f00504112303382e60cf@mail.gmail.com>
Message-ID: <d3fpja$heg$1@sea.gmane.org>

Gurpreet Sachdeva wrote:

>            Can anyone suggest some good tool for handling nested
> tables in a HTML page... BeautifulSoup is somehow not working with
> Nested Tables.

sounds strange.  have you tested the latest release? (2.0)

    http://www.crummy.com/software/BeautifulSoup/

if you cannot get BS to work, and the author cannot help you, you might consider
using an HTML->XML converter, and using your favourite XML tool to pull apart
the result.  some alternatives:

    http://utidylib.berlios.de/
    http://effbot.org/zone/element-tidylib.htm

</F> 





From jeremy+plusnews at jeremysanders.net  Mon Apr 18 06:10:58 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Mon, 18 Apr 2005 11:10:58 +0100
Subject: ANN: Veusz 0.5 - a scientific plotting package
References: <mailman.2027.1113746240.1799.python-announce-list@python.org>
	<mailman.2036.1113789043.1799.python-list@python.org>
	<1113810917.134164.113060@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.04.18.10.10.58.36795@jeremysanders.net>

On Mon, 18 Apr 2005 00:55:17 -0700, hemanth wrote:

> Why not matplotlib? Of late, it has seemed to have picked up a lot of
> attention. I would prefer that the different plotting packages developers
> join hands and implement missing features into a single plotting package
> and make this a part of Python standard library. In contrast to the
> various web frameworks we now have in Python, it is preferable to have
> atleast one plotting package as a standard Python package.

I made a reply on this subject to the SciPy mailing list:
 http://www.scipy.org/mailinglists/mailman?fn=scipy-user/2005-April/004312.html

Basically my main issue was the baroque object structure that matplotlib
used (it may have got better then), and its speed (which has).

The difficulty of writing a plotting package is the user interface, and so
I don't think I'm wasting much effort by having my own plotting routines.
I've done 90% of what's needed there. Basically, I'll be happy when
contouring and images are added.

The advantage of Veusz is the nice object-based system of building up a
plot.

I have a version of veusz which used matplotlib as a backend, but I
abandoned that several months ago.

Jeremy



From enleverlesO.OmcO at OmclaveauO.com  Thu Apr 14 15:34:56 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Thu, 14 Apr 2005 21:34:56 +0200
Subject: Using python from a browser
References: <mailman.1928.1113506375.1799.python-list@python.org>
Message-ID: <425eedec$0$3101$8fcfb975@news.wanadoo.fr>

Hi !

I confirm for IE.  Others, I don't know.

@-salutations

Michel Claveau








From radam2 at tampabay.rr.com  Sun Apr  3 09:23:28 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 13:23:28 GMT
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<1112466233.403989.125810@l41g2000cwc.googlegroups.com>
	<b8lu411dfphm8lbc6tc5anpq9m2tn3qlef@4ax.com>
	<1112516432.638697.193840@o13g2000cwo.googlegroups.com>
Message-ID: <2erv41d8ilujl0vmformr26vm0tvhf689o@4ax.com>

On 3 Apr 2005 00:20:32 -0800, "George Sakkis" <gsakkis at rutgers.edu>
wrote:

>Yes, it is possible to turn off type checking at runtime; just add this
>in the beginning of your define:
>
>def define(func):
>    if not ENABLE_TYPECHECKING:
>        return lambda func: func
>    # else decorate func
>
>where ENABLE_TYPECHECKING is a module level variable that can be
>exposed to the module's clients. In my module, the default is
>ENABLE_TYPECHECKING = __debug__.
>
>
>George

Cool, I'll try that. 

Thanks,
Ron



From barbaros at ptmat.fc.ul.pt  Mon Apr  4 14:31:11 2005
From: barbaros at ptmat.fc.ul.pt (barbaros)
Date: 4 Apr 2005 11:31:11 -0700
Subject: dynamic partial mirror, apt-get fails
Message-ID: <1112639471.508763.113780@f14g2000cwb.googlegroups.com>

Hi everybody,

I am trying to implement a cgi script for mirroring a small part of a
large collection of files (the debian distribution). The idea is to
mirror only those files which are requested, by downloading them "on
the fly" when the clients request them. Requests in the form "wget
http://local.mirror.pt/~debian/cgi-bin/get.cgi?pool/main/a/abcde/abcde.deb"
work fine already. The script get.cgi verifies if the file exists. If
it exists, the script simply sends a "Location: ..." directive to its
standart output and exists. If the file does not exist, the script
downloads it from one of several predefined locations, and after the
downloading process has succeeded it sends a "Location: ..." directive
to its standard output and exits.

This is more or less what apt-proxy (and other proxies) do, except that
my script is independent of the directory structure (it should work for
any collection of files, not only for the debian distribution) and it
can be run by an ordinary user (you don't have to be root in order to
install it).

Now, the problem is that the debian package manager (dselect or
apt-get) does not work exactly like wget. Requests in the form "apt-get
http://..." fail with the strange message "302 Found". I looked a
little bit into the source of both wget and apt-get and it seems to me
that wget has code which deals specifically with the "Location: ..."
directive, while apt-get has not.

The questions are: Is my conclusion above correct ? Are future
versions of apt-get going to accept "Location: ..." directives ? Should
I try and modify the source of apt-get in order to teach it to handle
these directives ?

You can find all the details about my problem at my web page:
http://cmaf.ptmat.fc.ul.pt/~barbaros -> english -> computers and
programming -> deb_part_mirr

Thank you. Cristian Barbarosie


-- 
PLEASE NOTE: comp.infosystems.www.authoring.cgi is a
SELF-MODERATED newsgroup. aa.net and boutell.com are
NOT the originators of the articles and are NOT responsible
for their content.

HOW TO POST to comp.infosystems.www.authoring.cgi:
http://www.thinkspot.net/ciwac/howtopost.html


From cpghost at cordula.ws  Wed Apr 13 11:32:22 2005
From: cpghost at cordula.ws (Cordula's Web)
Date: 13 Apr 2005 08:32:22 -0700
Subject: for line in file weirdness
References: <1113388411.589754.82600@f14g2000cwb.googlegroups.com>
	<mailman.1830.1113393526.1799.python-list@python.org>
Message-ID: <1113406342.700962.51800@l41g2000cwc.googlegroups.com>

A read-ahead buffer? Yes, that would explain it. Sorry, I missed this
piece of information in the documentation.

Thanks to all who replied.



From mefjr75 at hotmail.com  Wed Apr 27 14:02:55 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 27 Apr 2005 11:02:55 -0700
Subject: names of methods, exported functions
In-Reply-To: <1114619877.485916.232570@l41g2000cwc.googlegroups.com>
References: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
	<d4nmv1$f5d$1@gemini.csx.cam.ac.uk> <426f9552.44993106@news.oz.net>
	<d4o6t6$n6r$1@gemini.csx.cam.ac.uk>
	<1114619877.485916.232570@l41g2000cwc.googlegroups.com>
Message-ID: <1114622385.802866.265100@o13g2000cwo.googlegroups.com>

Appears that most of the relevant code is in the Helper and TextDoc
classes of pydoc also might need the doc() function.
My head hurts every time I stare at the internals of pydoc ;)
I guess it is time for a lunch break.
M.E.Farmer



From jerf at jerf.org  Fri Apr  1 16:46:14 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 16:46:14 -0500
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<it7r41dco1e2mejfl1ibgjh6ses3d04baa@4ax.com>
Message-ID: <pan.2005.04.01.21.46.13.894882@jerf.org>

On Fri, 01 Apr 2005 19:56:55 +0000, Ron_Adam wrote:

> On Fri, 01 Apr 2005 13:47:06 -0500, Jeremy Bowers <jerf at jerf.org>
> wrote:
>>Is this an April Fools gag? If so, it's not a very good one as it's quite
>>in line with the sort of question I've seen many times before. "I have
>>a hammer, how do I use it to inflate my tire?"
> 
> Not an April fools gag, I'm just new to decorators and google brings
> up lots of discussions from the past on how they may be implemented in
> the future, but not much in actually how they work or how to use them.

OK, just checking :-)

A decorator is completely equivalent in principle to

def function():
	pass
function = decorator(function)

That's a simplified form; decorators can themselves be an expression which
returns a callable that can be applied to a function and the rule for
applying several in sequence work as you'd expect (pipelining earlier
results into later ones, making for a great Obfuscated Python entry or
two based on the "function name misdirection" trick), but this simplified
form captures the essense, which is what I think you're looking for. In
particular, it's just "syntax sugar", not a "special feature".

> I'm trying to understand the use's, limits, and possibilities of
> decorators.
> 
> It just occurred to me that wrapping the contents of a function vs
> wrapping the function it's self, could be useful.

Decorators, literally, can only wrap functions. You can write a wrapper
then that does something to the arguments, which people sometimes do, but
you can't directly "wrap" the arguments. 

Note, having shown you how decorators work, you can "manually" apply the
decorator yourself:

Python 2.3.5 (#1, Mar  3 2005, 17:32:12) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import string
>>> string._join = string.join
>>> def joinWrap(*args, **kwargs):
...     print args, kwargs
...     return "My Wrapper", string._join(*args, **kwargs)
... 
>>> string.join = joinWrap
>>> string.join(["1","2","3"], "|")
My Wrapper (['1', '2', '3'], '|') {}
'1|2|3'
>>> 

So, whatever it is you are trying can do can still be done without the
decorator syntax, and *this* is not unheard of, though managing the
references correctly can be tricky the first few times if you're not used
to it. (Note the replaced function (join in this example) can go anywhere
the wrapper can get at it, I just stick it back in the original module for
simplicity.) It's not the first thing I reach for, in fact in all my
testing code I don't think I ever do this, but it is in the toolbox.

Do this instead of abusing the decorator syntax; you could write a
decorator that tries to figure out if it's being run in a testing
environment and conditionally affects the function, but that's probably a
bad idea.

Feeling-like-I-owed-you-an-answer-after-the-april-fool-accusation-ly yrs,
Jeremy Bowers
:-)


From grante at visi.com  Sun Apr 24 11:38:29 2005
From: grante at visi.com (Grant Edwards)
Date: Sun, 24 Apr 2005 15:38:29 -0000
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
Message-ID: <116nfblc10i9340@corp.supernews.com>

On 2005-04-24, Michael Sparks <zathras at thwackety.com> wrote:

>>>> a=["hello"]
>>>> a = a + "world"
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: can only concatenate list (not "str") to list

> However if we do this just slightly differently:
>
>>>> a = ["hello"]
>>>> a += "world"
>>>> a
> ['hello', 'w', 'o', 'r', 'l', 'd']
>
> We get completely different behaviour. This strikes me as a bug - should I
> log it as one, or is there a good reason for this behaviour?

I think it's a bug regardless of the reason for the behavior: 

 1) It doesn't do what a reasonable user expects.

 2) It doesn't do what the documentation says it will.
    According to the language reference,

      An augmented assignment expression like x += 1 can be
      rewritten as x = x + 1 to achieve a similar, but not
      exactly equal effect. In the augmented version, x is only
      evaluated once.

    I don't consider the two results you posted "similar".
  
-- 
Grant Edwards                   grante             Yow!  TAILFINS!!...click...
                                  at               
                               visi.com            


From gmuller at worldonline.nl  Thu Apr 21 14:44:25 2005
From: gmuller at worldonline.nl (Gerrit Muller)
Date: Thu, 21 Apr 2005 20:44:25 +0200
Subject: python-dev Summary for 2005-04-01 through 2005-04-15
In-Reply-To: <1114042877.208529.146820@g14g2000cwa.googlegroups.com>
References: <1114042877.208529.146820@g14g2000cwa.googlegroups.com>
Message-ID: <4267f48d$0$44097$5fc3050@dreader2.news.tiscali.nl>

Tim Lesher wrote:

> ---------------------------
> New python-dev summary team
> ---------------------------
> 
> This summary marks the first by the team of Steve Bethard, Tim Lesher,
> and Tony Meyer.  We're trying a collaborative approach to the
> summaries: each fortnight, we'll be getting together in a virtual
> smoke-filled back room to divide up the interesting threads.  Then
> we'll stitch together the summaries in roughly the same form as you've
> seen in the past. We'll mark each editor's entries with his initials.
> 
+1

This first summary is a good start! Thanks.

> Thanks to Brett Cannon for sixty-one excellent python-dev summaries.
> Also, thanks for providing scripts to help get the new summaries off
> the ground! We're looking forward to the contributions you'll make to
> the Python core, now that the summaries aren't taking up all your
> time.

+1

Brett, thanks a lot!

regards, Gerrit
--
Praktijk voor Psychosociale therapie Lia Charit?
http://www.liacharite.nl/


From sabbey at u.washington.edu  Sun Apr 17 18:02:12 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sun, 17 Apr 2005 15:02:12 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
Message-ID: <Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>

Ron_Adam wrote:
> On Sat, 16 Apr 2005 17:25:00 -0700, Brian Sabbey
>> Yes, much of what thunks do can also be done by passing a function
>> argument.  But thunks are different because they share the surrounding
>> function's namespace (which inner functions do not), and because they can
>> be defined in a more readable way.
>
> Generally my reason for using a function is to group and separate code
> from the current name space.  I don't see that as a drawback.

I agree that one almost always wants separate namespaces when defining a 
function, but the same is not true when considering only callback 
functions.  Thunks are a type of anonymous callback functions, and so a 
separate namespace usually isn't required or desired.

> Are thunks a way to group and reuse expressions in the current scope?
> If so, why even use arguments?  Wouldn't it be easier to just declare
> what I need right before calling the group?  Maybe just informally
> declare the calling procedure in a comment.
>
> def thunkit:	  # no argument list defines a local group.
> 	# set thunk,x and y before calling.
> 	before()
> 	result = thunk(x,y)
> 	after()
>
> def foo(x,y):
> 	x, y = y, x
> 	return x,y
>
> thunk = foo
> x,y = 1,2
> do thunkit
> print result
>
> -> (2,1)
>
> Since everything is in local name space, you  really don't need to
> pass arguments or return values.

I'm kicking myself for the first example I gave in my original post in 
this thread because, looking at it again, I see now that it really gives 
the wrong impression about what I want thunks to be in python.  The 
'thunkit' function above shouldn't be in the same namespace as the thunk. 
It is supposed to be a re-usable function, for example, to acquire and 
release a resource.  On the other hand, the 'foo' function is supposed to 
be in the namespace of the surrounding code; it's not re-usable.  So your 
example above is pretty much the opposite of what I was trying to get 
across.

>
> The 'do' keyword says to evaluate the group.  Sort of like eval() or
> exec would, but in a much more controlled way.  And the group as a
> whole can be passed around by not using the 'do'.  But then it starts
> to look and act like a class with limits on it.  But maybe a good
> replacement for lambas?
>
> I sort of wonder if this is one of those things that looks like it
> could be useful at first, but it turns out that using functions and
> class's in the proper way, is also the best way. (?)

I don't think so.  My pickled_file example below can't be done as cleanly 
with a class.  If I were to want to ensure the closing of the pickled 
file, the required try/finally could not be encapsulated in a class or 
function.

>
>> You're right that, in this case, it would be better to just write
>> "f(stuff, 27, 28)".  That example was just an attempt at describing the
>> syntax and semantics rather than to provide any sort of motivation.  If
>> the thunk contained anything more than a call to 'stuff', though, it would
>> not be as easy as passing 'stuff' to 'f'.  For example,
>>
>> do f(27, 28):
>> 	print stuff()
>>
>> would require one to define and pass a callback function to 'f'.  To me,
>> 'do' should be used in any situation in which a callback *could* be used,
>> but rarely is because doing so would be awkward.  Probably the simplest
>> real-world example is opening and closing a file.  Rarely will you see
>> code like this:
>>
>> def with_file(callback, filename):
>> 	f = open(filename)
>> 	callback(f)
>> 	f.close()
>>
>> def print_file(file):
>> 	print file.read()
>>
>> with_file(print_file, 'file.txt')
>>
>> For obvious reasons, it usually appears like this:
>>
>> f = open('file.txt')
>> print f.read()
>> f.close()
>>
>> Normally, though, one wants to do a lot more than just print the file.
>> There may be many lines between 'open' and 'close'.  In this case, it is
>> easy to introduce a bug, such as returning before calling 'close', or
>> re-binding 'f' to a different file (the former bug is avoidable by using
>> 'try'/'finally', but the latter is not).  It would be nice to be able to
>> avoid these types of bugs by abstracting open/close.  Thunks allow you to
>> make this abstraction in a way that is more concise and more readable than
>> the callback example given above:
>
> How would abstracting open/close help reduce bugs?

I gave two examples of bugs that one can encounter when using open/close. 
Personally, I have run into the first one at least once.

> I'm really used to using function calls, so anything that does things
> differently tend to be less readable to me. But this is my own
> preference.  What is most readable to people tends to be what they use
> most. IMHO
>
>> do f in with_file('file.txt'):
>> 	print f.read()
>>
>> Thunks are also more useful than callbacks in many cases since they allow
>> variables to be rebound:
>>
>> t = "no file read yet"
>> do f in with_file('file.txt'):
>> 	t = f.read()
>>
>> Using a callback to do the above example is, in my opinion, more
>> difficult:
>>
>> def with_file(callback, filename):
>> 	f = open(filename)
>> 	t = callback(f)
>> 	f.close()
>> 	return t
>>
>> def my_read(f):
>> 	return f.read()
>>
>> t = with_file(my_read, 'file.txt')
>
> Wouldn't your with_file thunk def look pretty much the same as the
> callback?

It would look exactly the same.  You would be able to use the same 
'with_file' function in both situations.

> I wouldn't use either of these examples.  To me the open/read/close
> example you gave as the normal case would work fine, with some basic
> error checking of course.

But worrying about the error checking is what one wants to avoid.  Even if 
it is trivial to remember to close a file, it's annoying to have to think 
about this every time one wants to use a file.  It would be nice to be 
able to worry about closing the file exactly once.

It's also annoying to have to use try/finally over and over again as one 
would in many real-life situations.  It would be nice to be able to think 
about the try/finally code once and put it in a re-usable function.

The open/close file is just the simplest example.  Instead of a file, it 
maybe be a database or something more complex.

> Since Python's return statement can handle
> multiple values, it's no problem to put everything in a single
> function and return both the status with an error code if any, and the
> result.  I would keep the open, read/write, and close statements in
> the same function and not split them up.

What about try/finally?  What if it is more complex than just opening and 
closing a file?  The example that got me annoyed enough to write this 
pre-PEP is pickling and unpickling.  I want to unpickle a file, modify it, 
and immediately pickle it again.  This is a pretty easy thing to do, but 
if you're doing it over and over again, there gets to be a lot of 
boilerplate.  One can of course create a class to handle the boilerplate, 
but instantiating a class is still more complicated than it has to be. 
Here is an example of using thunks to do this:

def pickled_file(thunk, name):
 	f = open(name, 'r')
 	l = pickle.load(f)
 	f.close()
 	thunk(l)
 	f = open(name, 'w')
 	pickle.dump(l, f)
 	f.close()

Now I can re-use pickled_file whenever I have to modify a pickled file:

do data in pickled_file('pickled.txt'):
 	data.append('more data')
 	data.append('even more data')

In my opinion, that is easier and faster to write, more readable, and less 
bug-prone than any non-thunk alternative.

>>> When I see 'do', it reminds me of 'do loops'. That is 'Do' involves
>>> some sort of flow control.  I gather you mean it as do items in a
>>> list, but with the capability to substitute the named function.  Is
>>> this correct?
>>
>> I used 'do' because that's what ruby uses for something similar.
>>
>
> I could see using do as an inverse 'for' operator.  Where 'do' would
> give values to items in a list, verses taking them from a list. I'm
> not exactly sure how that would work. Maybe...
>
> def fa(a,b):
> 	return a+b
> def fb(c,d):
> 	return c*b
> def fc(e,f):
> 	return e**f
>
> fgroup:
> 	fa(a,b)
> 	fb(c,d)
> 	fc(e,f)
>
> results = do 2,3 in flist
>
> print results
> ->  (5, 6, 8)
>
> But this is something else, and not what your thunk is trying to do.
>
>
>
> So it looks to me you have two basic concepts here.
>
> (1.) Grouping code in local name space.
>
> I can see where this could be useful. It would be cool if the group
> inherited the name space it was called with.
>
> (2.) A way to pass values to items in the group.
>
> Since you are using local space, that would be assignment statements
> in place of arguments.
>
> Would this work ok for what you want to do?
>
> def with_file:				# no argument list, local group.
> 	f = open(filename)
> 	t = callback(f)
> 	f.close
>
> def my_read(f):
> 	return f.read()
>
> callback = my_read
> filename = 'filename'
> do with_file

This wouldn't work since with_file wouldn't be re-usable.  It also doesn't 
get rid of the awkwardness of defining a callback.

-Brian


From antonyliu2002 at yahoo.com  Wed Apr 20 00:11:46 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Tue, 19 Apr 2005 21:11:46 -0700 (PDT)
Subject: Importing some functions from a py file
In-Reply-To: 6667
Message-ID: <20050420041147.94358.qmail@web54502.mail.yahoo.com>

O, sorry, I did have

main()

at the very end of code1.py.

Sorry for this confusion.


--- John Machin <sjmachin at lexicon.net> wrote:
> On Tue, 19 Apr 2005 20:17:06 -0700 (PDT), Anthony
> Liu
> <antonyliu2002 at yahoo.com> wrote:
> 
> >The choice is (b):
> >
> >(b) you do have "def main()" as per my example, but
> >you have an unguarded "main()" at the top level
> >
> >Below is exactly what I have:
> >
> >def func1():
> >    do_sth_1()
> >
> >def func2():
> >    do_sth_2()
> >
> >def main():
> >    do sth_m()
> >#end of code1.py
> 
> 
> If that's what you have, then main() won't be
> executed *EVER*, neither
> when code1 is imported, nor when it is run as a
> script.
> 
> >
> >So, you suggest that if I add to the end of
> code1.py
> >module the following,
> >
> >if __name__ == "__main__":
> >    main()
> >
> >I should be OK, right?
> >
> >
> 
> Maybe, nobody can tell WTF is going on from your
> descriptions :-( 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


	
		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - You care about security. So do we. 
http://promotions.yahoo.com/new_mail


From michele.simionato at gmail.com  Tue Apr 12 12:51:19 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Apr 2005 09:51:19 -0700
Subject: singleton objects with decorators
In-Reply-To: <d3gtlh$2ll$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
	<d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>
	<d3gtlh$2ll$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1113324679.749845.300040@l41g2000cwc.googlegroups.com>

Uhm? If I pass different parameters I want to have
different instances. The Singleton behaviour is recovered
only when I pass always the same arguments, in
particular when I pass 0-arguments:

>>> class Foobar:
...     __metaclass__ = Memoize
...
>>> Foobar()
<__main__.Foobar object at 0xb7defbcc>
>>> Foobar()
<__main__.Foobar object at 0xb7defbcc>
>>> Foobar()
<__main__.Foobar object at 0xb7defbcc>

Of course if for Singleton you mean "whatever I pass
to the constructor it must always return the same
instance" then this pattern is not a Singleton.
This is why I call it memoize ;)



From max2 at fisso.casa  Tue Apr  5 13:30:46 2005
From: max2 at fisso.casa (max(01)*)
Date: Tue, 05 Apr 2005 17:30:46 GMT
Subject: redundant importr
In-Reply-To: <kv2dnZwEbKWF18zfRVn-sA@powergate.ca>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<3avnh3F6cekgkU1@individual.net>
	<fZU2e.718439$b5.32462435@news3.tin.it>
	<juudnZEu35NXvNHfRVn-jg@powergate.ca>
	<Qkh3e.1153576$35.42709917@news4.tin.it>
	<1MudnZ0j7M-bIdDfRVn-sA@powergate.ca>
	<f4z3e.1157512$35.42888414@news4.tin.it>
	<kv2dnZwEbKWF18zfRVn-sA@powergate.ca>
Message-ID: <aXz4e.739673$b5.33332295@news3.tin.it>

Peter Hansen wrote:
> max(01)* wrote:
> 
>> Peter Hansen wrote:
>>
>>> No it doesn't.  I thought I was clear, but I can reword
>>> it for you: the files are compiled *in-memory* and the
>>> results are never written to disk.
>>>
>>>  > *if* they are compiled, where are they put, if the
>>>
>>>> corresponding *.py files are on a non-writeable directory?
>>>
>>>
>>> They are not put anywhere.  
>>
>>
>> ok, maybe it is an implementation-dependent issue after all.
> 
> 
> Not really.
> 
>> consider this:
> 
> [snip]
> 
>> -rw-r--r--    1 max2     max2          307 2005-04-02 17:45 imported.pyc
>>
>> see?
> 
> 
> Yes, but you don't, yet. :-)
> 
> Obviously the .pyc file is being written, so my comments
> above, out of context, is wrong.
> 

oops!

> Now please go put them back in context.  You asked what
> would happen if the directory was not writable.  That's
> the context in which to interpret my claims that the
> bytecode (the *result* of the compilation) is not
> written to disk.
> 
> I'll try one last time, before giving up in abject
> failure and letting someone else take a stab at this:
> the compilation will occur every time if a .pyc file
> does not exist.  The interpreter will attempt to write
> the results of the compilation process to disk in a
> ..pyc file to cache it for the next time, to avoid
> having to recompile.  *If* this is not possible, then
> no caching takes place, no .pyc file is written, and
> the next time you run the code, the compilation step
> will occur all over again (note: with the results being
> held in memory only while the program runs, then
> discarded).
> 
> Please tell me it's clear now. :-)

it's not clear. it's crystalline. :-)

thanks for your patience and help.

best regards

macs


From seberino at spawar.navy.mil  Wed Apr 20 01:58:49 2005
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 19 Apr 2005 22:58:49 -0700
Subject: Why Python does *SLICING* the way it does??
Message-ID: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>

Many people I know ask why Python does slicing the way it does.....

Can anyone /please/ give me a good defense/justification???

I'm referring to why mystring[:4] gives me
elements 0, 1, 2 and 3 but *NOT* mystring[4] (5th element).

Many people don't like idea that 5th element is not invited.

(BTW, yes I'm aware of the explanation where slicing
is shown to involve slices _between_ elements.  This
doesn't explain why this is *best* way to do it.)

Chris



From grante at visi.com  Thu Apr 21 09:47:47 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 21 Apr 2005 13:47:47 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
Message-ID: <116fbo3pma1lsdb@corp.supernews.com>

On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:

> Well, I'm writing for embedded realtime systems in C/C++ and
> have never encountered a single need to use goto.

I have encountered situations in C programs where the best
thing to use was a goto.  Those situations have always been
handled beutifully by a "raise" in Python.

> Comparing interrupts to goto doesn't make any sense for me
> either. For example, most architectures have 'branch'
> *hardware* instructions that are much more close equivalents
> to goto than interrupts are, but that doesn't justify use of
> goto in high-level languages in any way.

I agree.  The "jump" or "branch" instruction corresponds
exactly to a goto.  An interrupt is more like a "signal" and a
"signal handler" in C.  Sort of like an asynchronous function
call or thread context switch.

-- 
Grant Edwards                   grante             Yow!  Now that we're
                                  at               in LOVE, you can BUY
                               visi.com            this GOLDFISH for a 48%
                                                   DISCOUNT.


From peter at engcorp.com  Fri Apr  1 12:41:26 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 01 Apr 2005 12:41:26 -0500
Subject: Showing errors explicitly in try... except
In-Reply-To: <1112354356.092391.238710@f14g2000cwb.googlegroups.com>
References: <1112354356.092391.238710@f14g2000cwb.googlegroups.com>
Message-ID: <r-mdneXvL9OuFdDfRVn-ug@powergate.ca>

Harlin Seritt wrote:
> When using try... except... errors don't show up. Is there a way to
> force stderr despite using try...except? 

"force", no.  The "stderr" stuff is done by an "unhandled
exception" handler that is at the very top level, so
if you catch the exception, it will never see it to
print it.

Doing this will probably suffice, however:

import traceback
try:
     1/0

# one should avoid non-specific exception catching
# in most cases, but this is an example:
except:
     traceback.print_exc()


-Peter


From tjreedy at udel.edu  Sun Apr 24 00:20:40 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 24 Apr 2005 00:20:40 -0400
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<426B083A.70104@cloudthunder.com>
Message-ID: <d4f6hi$aq0$1@sea.gmane.org>


"Richard Blackwood" <richardblackwood at cloudthunder.com> wrote in message 
news:426B083A.70104 at cloudthunder.com...
> Indeed, this language is math.

In mathematics, the word 'variable' is generally an undefined meta-term 
that is *notorious* for having multiple possible meanings and shades of 
meaning.  One mathematician/linguist once claimed to have discerned 
somewhere around 15 different meanings and shades thereof.  The context 
usually makes the particular meaning clear enough, at least to other 
mathematicians.  But the ambiguity sometimes disconcerting to students.

> My friend says that foo is a constant and necessarily not a variable.

'constant' is one of the possible meanings of 'variable'.  As is "Given 
that (3*x -2)/5 = 1, what is the value of the variable x".  Sometimes, 
whether a 'variable' actually 'varies' or not, is a matter of viewpoint. 
We may think of 'varying' as something that happens in time, whereas most 
math is timeless.

In any case, 'foo=5' can be followed, in Python, by 'foo="hopscotch" '.  So 
names (as opposed to objects) do not even have a type.  Also, in Python, 
'variable' is not a part of the official language description in the way it 
is for some other programming languages.

Terry J. Reedy







From rpmuller at gmail.com  Wed Apr  6 18:30:41 2005
From: rpmuller at gmail.com (RickMuller)
Date: 6 Apr 2005 15:30:41 -0700
Subject: sorting a list and counting interchanges
Message-ID: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>

I have to sort a list, but in addition to the sorting, I need to
compute a phase factor that is +1 if there is an even number of
interchanges in the sort, and -1 if there is an odd number of
interchanges.

I could write a bubble sort, count the number of interchanges, and
compute the factor, but I have a feeling that there some
decorate-sort-undecorate solution buried in this problem somewhere.
However, I can't see it. Can anyone else help me with this?

I was thinking of something along the lines of zipping the list with a
range() of the same length, sorting that, and then counting the number
of times the second list has an item smaller than its previous item. In
other words

a = [1,10,2,7]
b = zip(a,range(len(a)))
b.sort()
a_sorted = [i for i,j in b]
order = [j for i,j in b]
phase = 0
for i in range(len(order)-1):
    if order[i] > order[i+1]: phase += 1
phase = 2*(phase%2)-1

However, I can't prove that this works, and there's *got* to be a more
elegant way.

Thanks in advance,
Rick



From fredrik at pythonware.com  Fri Apr  8 17:03:02 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 23:03:02 +0200
Subject: Declaring variables from a list
References: <1163d88e.0504081255.438fbb96@posting.google.com>
Message-ID: <d36rdg$708$1@sea.gmane.org>

"Cactus" wrote:

> If I got a list is it possible to declare a variable from the items in that list?
>
> Code Sample:
> Blob = ['Var1', 'Var2', 'vAR3']
> i = 5
> for listitems in Blob:
>    i += 1
>    listitems = i
>
> print Var1
> 6
> print Var2
> 7
> print vAR3
> 8
>

> Something like that? This doesn't work (obviously) but is there a way to do this?

why?

if you want a dictionary, use a dictionary (see the tutorial for details).

</F> 





From mediocre_person at hotmail.com  Thu Apr 21 11:46:48 2005
From: mediocre_person at hotmail.com (mediocre_person at hotmail.com)
Date: 21 Apr 2005 08:46:48 -0700
Subject: A smallish Tkinter question
In-Reply-To: <4267c284$1_3@newspeer2.tds.net>
References: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
	<4267c284$1_3@newspeer2.tds.net>
Message-ID: <1114098408.274110.136660@z14g2000cwz.googlegroups.com>

***Many*** thanks. I was getting right confused, but this is pretty
clear. I had also tried, in run(...):
  while True:
      sleep(1.0)
      ...

But it's clear from your response why this also didn't work!

Nick.



From gandalf at geochemsource.com  Thu Apr  7 11:37:46 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 17:37:46 +0200
Subject: import statement - package visibility problem
In-Reply-To: <425550AC.2020006@geochemsource.com>
References: <42550CB9.8060309@geochemsource.com> <425539D2.2020001@rubin.hu>
	<425550AC.2020006@geochemsource.com>
Message-ID: <425553CA.9090403@geochemsource.com>


>>
>> 2. Maybe the layering of your application is wrong. If 
>> DatabaseConnection provides common functionality to the different 
>> Adapters, it should be on the same layer or one beneath the Adapters. 
>
Another notice. If I put 'DatabaseConnection' under 'Adapters' then it 
means that 'DatabaseConnection' is an adapter. But it is not. :-) In the 
other direction, Adapters are deeper, so adapters should can 
DatabaseConnection-s (and in fact they are).

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From ivanlan at pauahtun.org  Mon Apr 18 11:02:44 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Mon, 18 Apr 2005 09:02:44 -0600
Subject: Slight discrepancy with filecmp.cmp
References: <mailman.2039.1113797181.1799.python-list@python.org>
	<hdf661dugeimek4tgesr863rgcb3gmh5dv@4ax.com>
Message-ID: <4263CC14.8E920226@pauahtun.org>

Hi All--

John Machin wrote:
> 
> On Sun, 17 Apr 2005 22:06:04 -0600, Ivan Van Laningham
> <ivanlan at pauahtun.org> wrote:
> [snip]
> > So I wrote a set of
> >programs to both index the disk versions with the cd versions, and to
> >compare, using filecmp.cmp(), the cd and disk version.  Works fine.
> >Turned up several dozen files that had been inadvertantly rotated or
> >saved with the wrong quality, various fat-fingered mistakes like that.
> >
> >However, it didn't flag the files that I know have bitrot.  I seem to
> >remember that diff uses a checksum algorithm on binary files, not a
> >byte-by-byte comparison.  Am I wrong?
> 
> According to the docs:
> 
> """
> cmp( f1, f2[, shallow[, use_statcache]])
> 
> Compare the files named f1 and f2, returning True if they seem equal,
> False otherwise.
> Unless shallow is given and is false, files with identical os.stat()
> signatures are taken to be equal
> """
> 
> and what is an os.stat() signature, you ask? So did I.
> 
> According to the code itself:
> 
> def _sig(st):
>     return (stat.S_IFMT(st.st_mode),
>             st.st_size,
>             st.st_mtime)
> 
> Looks like it assumes two files are the same if they are of the same
> type, same size, and same time-last-modified. Normally I guess that's
> good enough, but maybe the phantom bit-toggler is bypassing the file
> system somehow. What OS are you running?
> 

WinXP, SP2

> You might like to do two things: (1) run your comparison again with
> shallow=False (2) submit a patch to the docs.
> 

You know, I read that doc, tried it, and it made absolutely no
difference.  Then I read your message, read the docs again, and finally
realized I had flipped the sense of shallow in my head.  Sheesh.  So
then I tried it with shallow=False, not True, and it runs about ten
times slower, but it works.  Beautifully.

Now I have to go back and redo the first five thousand, but it's worth
it.  Thanks.  Shows how much you need another set of eyeballs to debug
your brain;-)

> (-:
> You have of course attempted to eliminate other variables by checking
> that the bit-rot effect is apparent using different display software,
> a different computer, an observer who's not on the same medication as
> you, ... haven't you?
> :-)
> 

;-)  Absolutely.  Several different viewers and several different OSs. 
And my wife never sees anything the way I do;-)

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From cfriedl at bigpond.net.au  Wed Apr 27 19:57:30 2005
From: cfriedl at bigpond.net.au (cfriedl at bigpond.net.au)
Date: 27 Apr 2005 16:57:30 -0700
Subject: suggestions on how to do this
In-Reply-To: <mailman.2588.1114618884.1799.python-list@python.org>
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
	<mailman.2588.1114618884.1799.python-list@python.org>
Message-ID: <1114646250.393470.152270@l41g2000cwc.googlegroups.com>

Hi Terry

I apprecaite the advice. Briefly I'm familiar with the math (its an
eigenvalue problem in fluid flow) but not so much with python (3 months
on and off), hence my post here. I'm looking for python advice on how
to implement this effectively. I love python and would like to use it
well.

As for vague subject, I've not found a strong correlation between
subject line and number or depth of responses. Perhaps today the
curious looked at it. But at other times, even with a quite specific
subject, no replies come. Such is life.



From deetsNOSPAM at web.de  Thu Apr  7 09:14:37 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 07 Apr 2005 15:14:37 +0200
Subject: Python backend binding to PAM, NSS or pppd
References: <mailman.1466.1112849070.1799.python-list@python.org>
Message-ID: <d33bnt$d48$04$1@news.t-online.com>

Heiko Wundram wrote:

> Hey all!
> 
> Before I start hacking away, I'm looking for a Python backend binding for
> libpam or libnss, or a python binding for the pppd plugin mechanism.
> 
> I'm trying to set up an SQL authentication scheme for virtual user
> accounts used for mail and PPTP-VPN-access, and I'd love to do the
> authentication bit in Python. And, yes, I know about pam-mysql and
> nss-mysql, but both projects are old and unmaintained, and I use Oracle as
> backend DB anyway.
> 
> If anybody knows of any project which has implemented a part of this, I'd
> love to hear about the effort...

I've been using pyton-pam before. Works as expected - but pam frustrated me
a bit, and you gotta run as root for it to work - a thing I didn't want to
do.

No idea for pppd.
-- 
Regards,

Diez B. Roggisch


From abhishek216 at yahoo.com  Wed Apr 20 03:46:36 2005
From: abhishek216 at yahoo.com (Abhishek S)
Date: Wed, 20 Apr 2005 00:46:36 -0700 (PDT)
Subject: Fwd: Memory leak in python
Message-ID: <20050420074636.57522.qmail@web31714.mail.mud.yahoo.com>

Hi Nick,

Thanks for reply... Please include me in reply.
Currently i am not in the list (i will subscribe soon)

I upgarded to 2.4.1 - still the same issue.

Nick>
Thats not a lot of leak - have you done that over a
longer time period?

Abhi>
I have tried for 4 days. It has reached 150MB.

Nick>
Are there any objects in gc.garbage?
>>> gc.set_debug(gc.DEBUG_LEAK)
>>> gc.get_debug( )
62
>>> gc.collect()
0
>>> gc.garbage
[]
>>>

Abhi>
There is none.

Nick>
Are you writing objects with __del__ methods?  If so
then that is your problem probably.

Abhi> 
I have not written any __del__ methods.

Nick>
Have you written any C extension modules in C?

Yes. Many - All of them are called only 
when the app starts. And never called again.
Till then it is stable only - 16MB used.

I have tried following - let me know if you need any
more details.. and want me to try something.

1)
I found a "sizer" python program. Which gives me the
module which is growing. It indicates that __main__ is
growing.

__main__': 4000774

2) I tried following.. (not smart but..)

def f():
 c = gc.get_objects()
 j = 0
 for i in c:
   j = j + 1
   try:
     tmp = len(i)
     if tmp > 1000:
      print "(c[%d]) (%d)," % (j-1, tmp)
   except:
     pass

it prints me as folows:

l(c[175]) (7336),
l(c[12475]) (1260),
l(c[12477]) (1260),
l(c[12479]) (1381),
l(c[12481]) (1381),
l(c[34159]) (1200),
l(c[37144]) (28234),
l(c[37191]) (28286),
>>> type(c[37191])
<type 'dict'>
>>> for k,v in c[37164].items():
...    print k, v
...    b = b + 1
...    if b > 30:
...       break
...
1085115764 620
1080048556 2
1085045932 4
1085146316 1
1085246700 2
1090615060 9
1089571940 2
1090519084 2
1090876932 234
1093456364 48
1085168140 2
1089964748 6
1089994828 0
1090095684 69
1076932268 2
1085014108 6
1080092204 10
1084888812 1
1118543628 48
1089994860 6
1076731524 6
1079640188 3
1084883076 15
1079712492 1
1118459244 64
1080295564 1
1076522028 4
1085211788 2
1076887700 20
1076729756 70
1091012236 2

This two dict in the last is growing slowly..
I am not maintaing any dict with such indices and
value.

Any clue? 
Please let me know what else to check and how!

At the time i am ending this.. module size..
'__main__': 7926830,

Thanks,
Abhishek

Note: forwarded message attached.


__________________________________________________
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Subject: Memory leak in python
Date: Tue, 19 Apr 2005 04:58:18 -0700 (PDT)
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From uche.ogbuji at gmail.com  Sat Apr 16 10:12:30 2005
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: Sat, 16 Apr 2005 08:12:30 -0600
Subject: python modules in home dir
In-Reply-To: <8416c258.0504091309.7ba2047d@posting.google.com>
References: <8416c258.0504091309.7ba2047d@posting.google.com>
Message-ID: <1113660751.14099.19.camel@borgia>

On Sat, 2005-04-09 at 14:09 -0700, dzieciou wrote:

> I'm new-comer in Python.
> I want to install few Python modules (4Suite, RDFLib, Twisted and Racoon)
> in my home directory, since Python installation is already installed in the
> system
> and I'm NOT its admin.
> I cannot install pyvm (portable binary python machine) - have no such big
> quota.
> Any idea how can I solve it?

To install 4Suite in the home dir, use an incantation such as:

./setup.py config --prefix=$HOME/lib
./setup.py install

Note: I expect you also installed Python in your home dir?


-- 
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Use CSS to display XML, part 2 - http://www-128.ibm.com/developerworks/edu/x-dw-x-xmlcss2-i.html
Writing and Reading XML with XIST - http://www.xml.com/pub/a/2005/03/16/py-xml.html
Use XSLT to prepare XML for import into OpenOffice Calc - http://www.ibm.com/developerworks/xml/library/x-oocalc/
Schema standardization for top-down semantic transparency - http://www-128.ibm.com/developerworks/xml/library/x-think31.html



From tlesher at gmail.com  Wed Apr 20 20:21:17 2005
From: tlesher at gmail.com (Tim Lesher)
Date: 20 Apr 2005 17:21:17 -0700
Subject: python-dev Summary for 2005-04-01 through 2005-04-15
Message-ID: <1114042877.208529.146820@g14g2000cwa.googlegroups.com>

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2005-04-01_2005-04-15.html]



======================
Summary Announcements
======================

---------------------------
New python-dev summary team
---------------------------

This summary marks the first by the team of Steve Bethard, Tim Lesher,
and Tony Meyer.  We're trying a collaborative approach to the
summaries: each fortnight, we'll be getting together in a virtual
smoke-filled back room to divide up the interesting threads.  Then
we'll stitch together the summaries in roughly the same form as you've
seen in the past. We'll mark each editor's entries with his initials.

Thanks to Brett Cannon for sixty-one excellent python-dev summaries.
Also, thanks for providing scripts to help get the new summaries off
the ground! We're looking forward to the contributions you'll make to
the Python core, now that the summaries aren't taking up all your
time.

[TDL]

=========
Summaries
=========

-----------------------
Acceptable diff formats
-----------------------

Nick Coghlan asked if context diffs are still favoured for patches.
Historically, context diffs were preferred, but it appears that
unified diffs are the today's choice.  Raymond Hettinger made the
sensible suggestion that whichever is most informative for the
particular patch should be used, and Bob Ippolito pointed out that if
CVS is replaced with subversion, unified diffs will have better
support.  The `patch submission guidelines`_ will be updated at some
point to reflect the preference for unified diffs, although if your
diff program doesn't support '-u', then context diffs are ok - plain
patches are, of course, not.

Contributing threads:

- `Unified or context diffs?
<http://mail.python.org/pipermail/python-dev/2005-April/052657.html>`__

.. _patch submission guidelines: http://www.python.org/patches/

[TAM]


---------------
Developers List
---------------

Raymond Hettinger has started a `project to track developers`_ and the
(tracker and commit) privileges they have, and who gave them the
privileges, and why (for example, was it for a one-shot
project). Removing inactive developers should improve clarity,
institutional memory, security, and makes everything tidier.  Raymond
has begun contacting recently inactive developers to check whether
they still require the privileges they have.

Contributing threads:

- `Developer list update
<http://mail.python.org/pipermail/python-dev/2005-April/052540.html>`__

.. _project to track developers:
http://cvs.sourceforge.net/viewcvs.py/*checkout*/python/python/dist/src/Misc/developers.txt

[TAM]

----------------------
Right Operator Methods
----------------------

Greg Ewing explored an issue with new-style classes that define only
right operator methods (__radd__, __rmul__, etc.)  Instances of such a
class cannot be added/multiplied/etc. together as Python raises a
TypeError. Armin Rigo explained the rule: if the instances on both
sides of an operator are of the same class, only the non-reversed
method is ever called. Armin also explained that an __add__ or __mul__
method that returns NotImplemented may be called twice when Python
attempts to differentiate between numeric and sequence operations.

Contributing threads:

- `New style classes and operator methods
<http://mail.python.org/pipermail/python-dev/2005-April/052577.html>`__

[SJB]

------------------------------------------
Hierarchical groups in regular expressions
------------------------------------------

Chris Ottrey demoed his `pyre2 project`_ that can extract a hierarchy
of strings when nested groups match in a regular expression.  The
current re module (in the stdlib) only matches the last occurrence of
a group in the string, throwing away any preceding matches. People
discussed some of pyre2's proposed API, with the main suggestion being
to extend the API to support unnamed (positional) groups in addition
to named groups.

Though a number of people expressed interest in the idea, it was not
clear whether the functionality should be included in the standard
library. However, most agreed that if it was included, it should be
integrated with the existing re module. Gustavo Niemeyer offered to
perform this integration if an API could be agreed upon. Further
discussion was moved to the pyre2 `development wiki`_ and `mailing
list`_.

Contributing threads:

- `hierarchicial named groups extension to the re library
<http://mail.python.org/pipermail/python-dev/2005-April/052508.html>`__

.. _pyre2 project: http://pyre2.sourceforge.net/

.. _development wiki: http://py.redsoft.be/pyre2/wiki/

.. _mailing list:
http://lists.sourceforge.net/lists/listinfo/pyre2-devel

[SJB]

-------------------------------
Security capabilities in Python
-------------------------------

The issue of security came up again, and Ka-Ping Yee suggested that in
Python's restricted execution mode secure proxies can be created by
using lexical scoping.  He posted `some code`_ for revealing only
certain "facets" of an object by using a function to declare a proxy
class that used a function's local variables to build the proxy. Thus
to access the attributes used in the proxy class, you need to access
things like im_func or func_closure, which are not accessible in
restricted execution mode.

James Y Knight illustrated how strategic overriding of __eq__ in a
subclass of str could allow access to the hidden "facets". Eyal Lotem
suggested that such an attack could be countered by implementing
"facets" in C, but having to turn to C every time you needed a
particular security construct seemed unappealing.

Contributing threads:

- `Security capabilities in Python
<http://mail.python.org/pipermail/python-dev/2005-April/052580.html>`__

.. _some code: http://zesty.ca/python/facet.py

[SJB]

---------------------------------
Improving GilState API Robustness
---------------------------------

Michael Hudson noted that his changes to thread handling in the
readline module appeared to trigger `bug 1176893`_ ("Readline
segfault"). However, he believed the problem lay in the GilState API,
rather than in his changes: PyGilState_Release crashes if
PyEval_InitThreads wasn't called, even if the code you're writing
doesn't use multiple threads.

He proposed several solutions, but no clear favorite emerged from
respondents, and Tim Peters noted that `PEP 311`_, Simplified Global
Interpreter Lock Acquisition for Extensions, "specifically disowns
responsibility for worrying about whether Py_Initialize and
PyEval_InitThreads have been called."  After further discussion,
Michael checked in a change to PyGilState_Release that calls
PyEval_SaveThread instead of PyEval_ReleaseThread, fixing the problem.

Bob Ippolito wondered whether just calling PyEval_InitThreads directly
in Py_Initialize might be a better idea.  No objections were raised,
so long as the underlying OS locking mechanisms weren't overly
expensive; some initial benchmarks indicated that this approach was
viable, at least on Linux and OS X.

Contributing threads:

- `threading (GilState) question
<http://mail.python.org/pipermail/python-dev/2005-April/052562.html>`__

.. _bug 1176893: http://www.python.org/sf/1176893

.. _PEP 311: http://www.python.org/peps/pep-0311.html

[TDL]

----------------------------------------
Unicode byte order mark decoding
----------------------------------------

Evan Jones saw that the UTF-16 decoder discards the byte-order mark
(BOM) from Unicode files, while the UTF-8 decoder doesn't. Although
the BOM isn't really required in UTF-8 files, many Unicode-generating
applications, especially on Microsoft platforms, add it.

Walter D?rwald created a patch_ to add a UTF-8-Sig codec that
generates a BOM on writing and skips it on reading. A long discussion
ensued on the history of the Unicode standard and Microsoft's
influence over its evolution.  Stephen Turnbull suggested (and
Marc-Andre Lemburg agreed) that BOM and signature handling be moved to
a higher-level API, but no overall consensus was achieved.

Contributing threads:

- `Unicode byte order mark decoding
<http://mail.python.org/pipermail/python-dev/2005-April/052501.html>`__

.. _patch: http://www.python.org/sf/1177307

[TDL]

--------------------
Marshalling Infinity
--------------------

Scott David Daniels kicked off a very long thread by asking what
(un)marshal should do with floating point NaNs.  The current behaviour
(as with any NaN, infinity, or signed zero) is undefined: a
platform-dependant accident, because Python is written to C89, which
has no such concepts.  Tim Peters pointed out all code for
(de)serialing C doubles should go through
_PyFloat_Pack8()/_PyFloat_Unpack8(), and that the current
implementation suggests that the routines could simply copy bytes on
platforms that use the standard IEEE-754 single and double formats
natively.  Michael Hudson obliged by creating a `patch to implement
this`_.

The consensus was that the correct behaviour is that packing a NaN or
infinity shouldn't cause an exception.  When unpacking, an IEEE-754
platform shouldn't cause an exception, but a non-754 platform should,
since there's no sensible value that it can be unpacked to, and errors
should never pass silently.

Contributing threads:

- `marshal / unmarshal
<http://mail.python.org/pipermail/python-dev/2005-April/052593.html>`__

.. _patch to implement this: http://python.org/sf/1181301

[TAM]

---------------------------------
Location of the sign bit in longs
---------------------------------

Michael Hudson asked about the possibility of longs storing the sign
bit somewhere other than the current location, suggesting the top bit
of ob_digit[0].  Tim Peters suggested that it would be better to give
struct _longobject a distinct sign member.  This simplifies code,
costs no extra bytes for some longs, and 8 extra bytes for others, and
shouldn't hurt binary compatibility.

Michael coughed up a `longobject patch`_, which seems likely to be
checked in.

Contributing threads:

- `marshal / unmarshal
<http://mail.python.org/pipermail/python-dev/2005-April/052593.html>`__

.. _longobject patch: http://python.org/sf/1177779

[TAM]


===============
Skipped Threads
===============

- python-dev Summary for 2005-03-16 through 2005-03-31 [draft]
- [Python-checkins] python/dist/src/Lib/logging handlers.py, 1.19,
1.19.2.1
- [Python-checkins] python/dist/src/Modules mathmodule.c, 2.74, 2.75
- Weekly Python Patch/Bug Summary
- Mail.python.org
- New bug, directly assigned, okay?
- inconsistency when swapping obj.__dict__ with a dict-like object...
- Pickling instances of nested classes
- args attribute of Exception objects



========
Epilogue
========

------------
Introduction
------------

This is a summary of traffic on the `python-dev mailing list`_ from
April 01, 2005 through April 15, 2005.  It is intended to inform the
wider Python community of on-going developments on the list on a
semi-monthly basis.  An archive_ of previous summaries is available
online.

An `RSS feed`_ of the titles of the summaries is available.  You can
also watch comp.lang.python or comp.lang.python.announce for new
summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This is the first summary written by the python-dev summary cabal of
Steve Bethard, Tim Lesher, and Tony Meyer (So long, Brett, and thanks
for all the fish!).

To contact us, please send email:

- Steve Bethard (steven.bethard at gmail.com)
- Tim Lesher (tlesher at gmail.com)
- Tony Meyer (tony.meyer at gmail.com)

Do *not* post to comp.lang.python if you wish to reach us.

The `Python Software Foundation`_ is the non-profit organization that
holds the intellectual property for Python.  It also tries to advance
the development and use of Python.  If you find the python-dev Summary
helpful please consider making a donation.  You can make a donation at
http://python.org/psf/donations.html .  Every penny helps so even a
small donation with a credit card, check, or by PayPal helps.


--------------------
Commenting on Topics
--------------------

To comment on anything mentioned here, just post to
`comp.lang.python`_ (or email python-list at python.org which is a
gateway to the newsgroup) with a subject line mentioning what you are
discussing.  All python-dev members are interested in seeing ideas
discussed by the community, so don't hesitate to take a stance on
something.  And if all of this really interests you then get involved
and join `python-dev`_!


-------------------------
How to Read the Summaries
-------------------------

The in-development version of the documentation for Python can be
found at http://www.python.org/dev/doc/devel/ and should be used when
looking up any documentation for new code; otherwise use the current
documentation as found at http://docs.python.org/ .  PEPs (Python
Enhancement Proposals) are located at http://www.python.org/peps/ .
To view files in the Python CVS online, go to
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ .  Reported
bugs and suggested patches can be found at the SourceForge_ project
page.

Please note that this summary is written using reStructuredText_.  Any
unfamiliar punctuation is probably markup for reST_ (otherwise it is
probably regular expression syntax or a typo =); you can safely ignore
it.  I do suggest learning reST, though; it's simple and is accepted
for `PEP markup`_ and can be turned into many different formats like
HTML and LaTeX.  Unfortunately, even though reST is standardized, the
wonders of programs that like to reformat text do not allow me to
guarantee you will be able to run the text version of this summary
through Docutils_ as-is unless it is from the `original text file`_.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list:
http://mail.python.org/mailman/listinfo/python-dev
.. _c.l.py:
.. _comp.lang.python:
http://groups.google.com/groups?q=comp.lang.python
.. _PEP Markup: http://www.python.org/peps/pep-0012.html

.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _PSF:
.. _Python Software Foundation: http://python.org/psf/

.. _last summary: http://www.python.org/dev/summary/
.. _original text file:
http://www.python.org/dev/summary/2005-04-01_2005-04-15.ht
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.. _RSS feed: http://www.python.org/dev/summary/channews.rdf



From steve at holdenweb.com  Mon Apr  4 16:51:49 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 04 Apr 2005 16:51:49 -0400
Subject: text analysis in python
In-Reply-To: <42507E00.1090806@acm.org>
References: <mailman.1255.1112523725.1799.python-list@python.org><1325i2-sd2.ln1@lairds.us>	<424FF1CD.2040102@acm.org>	<mailman.1270.1112566442.1799.python-list@python.org>
	<42507E00.1090806@acm.org>
Message-ID: <d2s998$t34$1@sea.gmane.org>

Maurice LING wrote:
> Terry Reedy wrote:
> 
>> "Maurice LING" <mauriceling at acm.org> wrote in message 
>> news:424FF1CD.2040102 at acm.org...
>>
>>> Say I code my  stuffs in Jython (importing java libraries) in a file 
>>> "text.py"
>>
>>
>>
>> Just to be clear, Jython is not a separate langague that you code 
>> *in*, but a separate implementation that you may slightly differently 
>> code *for*.
>>
> Yes, I do get this point rightly. Jython is just an implementation of 
> Python virtual machine using Java. I do note that there are some 
> differences, such as, Jython can only handle pure python modules. 
> However, I'm not a language expert to differentiate language differences 
> between these 2 implementations of Python, as in Jython and CPython. If 
> someone care to enlighten, it will be my pleasure to consult. TIA.
> 
That's not strictly correct. The Python virtual machine isn;t 
implemented at all in Jython, instead the JVM is used as the compilation 
target.

>>
>>> ... Will there be any issues when I try to import text.py into CPython?
>>
>>
>>
>> If text.py is written in an appropriate version of Python, it itself 
>> will cause no problem.  Hoqwever, when it imports javacode files, as 
>> opposed to CPython bytecode files, CPython will choke.
>>
> In my example, the file "text.py" is coded in Jython, importing Java 
> libraries. I do get that I cannot import Java jar files directly into 
> CPython. What I do not get is that what is so special about Jython that 
> it can "fool" CPython into using Java libraries... or is that there will 
> always be a need for Java virtual machine and Python virtual machine 
> when I use Java libraries in Jython... and importing Jython coded files 
> into CPython....
> 
Jython is pretty much a Python interpreter that compiles Python into JVM 
bytecodes. Consequently the amount of "trickery" involved is rather 
less, though clearly there is some (automated conversion b etween Java 
and Pythin data types where appropriate, and automated signature-based 
selection of the appropriate Java method being the two most obvious).

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From jepler at unpythonic.net  Tue Apr 12 17:09:01 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 12 Apr 2005 16:09:01 -0500
Subject: Why won't someone step up and make use of the Free tools (was
	Re: Python 2.4 killing commercial Windows Python development ?)
In-Reply-To: <425c29b6.217598109@news.oz.net>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<mailman.1760.1113313382.1799.python-list@python.org>
	<425c29b6.217598109@news.oz.net>
Message-ID: <20050412210900.GC6421@unpythonic.net>

On Tue, Apr 12, 2005 at 08:25:58PM +0000, Bengt Richter wrote:
> But credit where due. Someone has stepped up to a large chunk of the problem:
> 
>    http://jove.prohosting.com/iwave/ipython/pyMinGW.html

Yay.  I'm glad somebody *is* doing this.  Maybe all that is needed is to
"get the word out".  Some prepackaged binaries would be nice, however.

Jeff
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From james at wrong.nu  Thu Apr 14 09:47:05 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Thu, 14 Apr 2005 13:47:05 +0000
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
Message-ID: <200504141447.05710.james@wrong.nu>

On Thursday 14 April 2005 10:27, c3poptuse at yahoo.com wrote:
> Supercomputer and encryption and compression @ rate of 96%

<snip>

Dear Sir or Madam,
    I have received notification that you posted a compression algorithm on 
the newsgroup comp.lang.python on or about 10:27:26 on the 04/14/2005. I am 
writing to you to inform you that the algorithm published infringes my 
"zero-bit compression" algorithm, US Pat No. 13375P33K, which details the 
transmission of information using no bandwidth to achieve a 100% 
compression. Please immediately follow up with a retraction of rights to this 
algorithm or you will hear from my solicitor, Mr J. Peasbody.

    Yours in law,
        James Harlow.



From justaskme at if.you.want.to.contact.me  Sat Apr  9 08:12:11 2005
From: justaskme at if.you.want.to.contact.me (Joe)
Date: Sat, 09 Apr 2005 14:12:11 +0200
Subject: Python/wxPython Reducing memory usage.
References: <1113028557.757987.146950@g14g2000cwa.googlegroups.com>
Message-ID: <nghf51td0cs98a45k6vo9q00ei01jj9p8p@4ax.com>

On 8 Apr 2005 23:35:57 -0700, "lotmr" <stealthwang at gmail.com> wrote:
>Is there any way that I could compile or optimize the my program and/or its memory usage?

... and ideally, if we could also reduce the size of the DLL, so that
it would only include the widgets actually used, it'd be even nicer.

>(Note: I don't have a problem with making this program win32 specific,
>as it already is only win32)

I don't have much experience with it, but is the PythonWin wrapper to
MFC horrible to use as compared to wxWidgets? If it's good enough and
you don't care about non-Windows platforms, you'll probably save a lot
of RAM and file footprint.

Joe.


From matt.fryer at gmail.com  Fri Apr 22 12:31:59 2005
From: matt.fryer at gmail.com (Matt)
Date: 22 Apr 2005 09:31:59 -0700
Subject: Python Debugger with source code tracking ability
In-Reply-To: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
References: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
Message-ID: <1114187519.431002.184420@z14g2000cwz.googlegroups.com>

wxPython is including the ActiveGrid ide as a sample in its latest
point release. The ide includes a debugger that allows you to set
breakpoints in source code, inspect values, etc.



From irmen.NOSPAM at xs4all.nl  Sat Apr 16 09:43:32 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 16 Apr 2005 15:43:32 +0200
Subject: XML parsing per record
In-Reply-To: <pan.2005.04.16.13.24.51.477214@gmail.com>
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
Message-ID: <42611686$0$148$e4fe514c@news.xs4all.nl>

Willem Ligtenberg wrote:
> I want to parse a very large (2.4 gig) XML file (bioinformatics ofcourse :))
> But I have no clue how to do that. Most things I see read the entire xml
> file at once. That isn't going to work here ofcourse.
> 
> So I would like to parse a XML file one record at a time and then be able
> to store the information in another object.
> How should I do that?
> 
> Thanks in advance,
> 
> Willem Ligtenberg
> A total newbie to python by the way.


Read about SAX parsers.
This may be of help:
http://www.devarticles.com/c/a/XML/Parsing-XML-with-SAX-and-Python/

Out of curiousity, why is the data stored in a XML file?
XML is not known for its efficiency....

--Irmen


From Scott.Daniels at Acm.Org  Fri Apr  8 16:18:33 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 13:18:33 -0700
Subject: Can dictionary values access their keys?
In-Reply-To: <d36gj9$t44$1@vegh.ks.cc.utah.edu>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu> <4256b3d3$1@nntp0.pdx.net>
	<d36gj9$t44$1@vegh.ks.cc.utah.edu>
Message-ID: <4256e1ba$1@nntp0.pdx.net>

Matthew Thorley wrote:
> Scott David Daniels wrote: ...(explaining Python has no "the" parent)
> I see what your saying, but I my situation the values of the dictionary
> are unique objects created by a parent object. 
But that is your convention, not Python's. Some good general rules:
   1) For frequent (or fast) access you should know where something is,
      rather than search for it.
   2) You (your app) should be willing to "pay" for your own needs for
      navigation rather than expect a built-in cost for everyone that
      provides convenience for a few.
   3) A very "Pythonic" storage system makes it clear how you navigate,
      so relying on magic is usually a bad idea.

> When the 'root object' is 'global' I see what your saying, but when
> 
> class A:
>   def __init__(self, container):
>     self.container=container
> 
> class B(dict):
>   def magice_get_parent(self):
>      ...
> 
> class special_value():
>   def __init__(self, val):
>      self.val = val
> 
>   def magic_get_key(self):
>     ...
> 
> parent = A(B)
> parent.container[x] = special_value(1)
> parent.container[y] = special_value(2)
> parent.container[z] = special_value(1)


OK, if you want help, try doing code, not sketching what it might be.
 > class special_value():
Cannot be.  Perhaps:
    class special_value(object):

 > class A:
 >   def __init__(self, container):
 >     self.container=container
...
 > class B(dict):
...
 > parent = A(B)
 > parent.container[x] = ...

Either you must use:
   parent = A(B())

or
   class A:
     def __init__(self, containerClass):
        self.container = containerClass()

By the way, if you are subclassing dict, you might as well
use new-style throughout (so: class A(object): ...).

Now, how about rather than all of this magic, trying:

   class A:
     def __init__(self, container):
        self.container = container
        self.container.parent = self

and instead of

>   parent.container[x] = special_value(1)

     parent.container.set(x, special_value(1))


using:
     class B(dict):
         ...
         def set(self, key, contents):
             self[key] = contents
             contents.origin = self, key
         ...

Then after:
     parent = A(B())
     parent.container.set(x, special_value(1))
     parent.container.set(y, special_value(2))
     parent.container.set(z, special_value(1))

You can do:

     child = parent.container
     print child.parent

     value1 = parent.container[x]
     box, key = value1.origin
     assert box[key] is value1 and box.parent is parent

And you didn't have to use magic at all.

--Scott David Daniels
Scott.Daniels at Acm.Org


From bokr at oz.net  Sat Apr 30 03:28:05 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 30 Apr 2005 07:28:05 GMT
Subject: Micro-PEP: str.translate(None) to mean identity translation
References: <4272e00c.260731842@news.oz.net>
	<1114835238.762478.236940@o13g2000cwo.googlegroups.com>
Message-ID: <42732ed7.280902606@news.oz.net>

On 29 Apr 2005 21:27:18 -0700, "M.E.Farmer" <mefjr75 at hotmail.com> wrote:

>Bengt Richter wrote:
>> Just thought None as the first argument would be both handy and
>mnemonic,
>> signifying no translation, but allowing easy expression of deleting
>characters,
>> e.g.,
>>
>>    s = s.translate(None, 'badcharshere')
>>
>> Regards,
>> Bengt Richter
>
>What's wrong with :
>
>s = s.replace('badchars', "")
That's not what translate does with the badchars, which is a set of
characters, each and all of whose instances in the source string
will be deleted from the source string. Something like
   for c in badchars:
      s = s.replace(c,'')
>
>It seems obvious to replace a char ( to me anyway ) with a blank
>string, rather than to 'translate' it to None.
>I am sure you have a reason what am I missing ?
>M.E.Farmer
The first argument is normally a 256-character string that serves as a table
for converting source characters to destination, so s.translate(table, bad)
does something like
    s = ''.join([table[ord(c)] for c in s if c not in bad]

 >>> help(str.translate)
 Help on method_descriptor:

 translate(...)
     S.translate(table [,deletechars]) -> string
     Return a copy of the string S, where all characters occurring
     in the optional argument deletechars are removed, and the
     remaining characters have been mapped through the given
     translation table, which must be a string of length 256.

So just to delete, you wind up constructinf a table argument that is just 1:1 as in

 >>> 'abcde'.translate(''.join([chr(i) for i in xrange(256)]), 'tbd')
 'ace'

and the answer to the question, "What translation does such a table do?" is "None" ;-)

Regards,
Bengt Richter


From hmrosser at bellsouth.net  Wed Apr 27 22:38:04 2005
From: hmrosser at bellsouth.net (Hal Rosser)
Date: Wed, 27 Apr 2005 22:38:04 -0400
Subject: Problem with sending a variable(python) while using html
References: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
	<mailman.2596.1114630252.1799.python-list@python.org>
	<426ff886$0$13746$ba624c82@nntp03.dk.telia.net>
Message-ID: <3_Xbe.8981$lf2.6507@bignews6.bellsouth.net>

append "&eventid=str(variable_name)"  to the url in the link
The hidden field is not sent unless the form is submitted.
If you use the link - you send the data appended to the url

"Hansan" <none> wrote in message
news:426ff886$0$13746$ba624c82 at nntp03.dk.telia.net...
> Hi.
>
> Sorry forgot to post a "non-working" example
>
> That could be
> print "<a href=script.py?id=", variable,  "'>", "some text"  <input
> type=hidden name="eventid" value='''+str(variable_name)+'''>'''</a>"
>
> I know that it isnt very creative, but I am having a hard time getting
html
> to work together with python.
>
> When the link "some text" is clicked I want to send both the first
variable
> called variable and the second one(variable_name) to the script
(script.py)




From max at alcyone.com  Tue Apr 12 23:03:15 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 12 Apr 2005 20:03:15 -0700
Subject: templating system
In-Reply-To: <mailman.1669.1113204074.1799.python-list@python.org>
References: <mailman.1644.1113148510.1799.python-list@python.org>	<ho-dnRDXra5RSMTfRVn-qQ@speakeasy.net>
	<mailman.1669.1113204074.1799.python-list@python.org>
Message-ID: <196dnbltDvtpFsHfRVn-uA@speakeasy.net>

Ksenia Marasanova wrote:

> Thanks!
> 
> I've read "Known issues and caveats" on the website:
> 
> """
> EmPy was primarily intended for static processing of documents, 
> rather than dynamic use, and hence speed of processing was not  the
> primary consideration in its design.
> """
> 
> Have you noticed any speed problems with EmPy?

In the interests of full disclosure, I'm the author of EmPy.

All I meant by that note was that EmPy was not primarily designed for 
blazing speed; that is, it could easily be made much more efficient in a 
lot of ways.  I've never had a need to do so, so it's always been low 
priority.  I've certainly never heard of any complaints of EmPy's speed 
(or lack therefore) as being a problem in the field.  Unless you huge 
realtime demands, I doubt EmPy's speed would be a major impediment.  (Of 
course, if you find that it is, please tell me!)

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   A wise man never loses anything if he have himself.
   -- Montaigne


From fred.dixon at gmail.com  Wed Apr 13 10:44:11 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 13 Apr 2005 07:44:11 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
Message-ID: <1113403451.556360.116630@f14g2000cwb.googlegroups.com>

I want to use OPTIONS as a global var.
In this particular case I am trying to set a global debug constant so I
can have some debug logging happen when my program is run with a
-debug option.
what will actuall end up in OPTIONS is OPTIONS.debug = True as i am
using optparse module.



From fuzzyman at gmail.com  Fri Apr 29 09:30:30 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 29 Apr 2005 06:30:30 -0700
Subject: [ANN] Voidspace Python Guestbook 1.4.1 (etc)
Message-ID: <mailman.30.1114786085.14961.python-announce-list@python.org>

My Honoured Guests
=====================

Yup... the time has come, **The Voidspace Python Guestbook 1.4.1** has
been released into the wild.

* `The Guestbook Homepage`__
* `Quick Download Link (120k)`__
* `Plain Guestbook Example`__
* `Voidspace Guestbook`__ [#]_

__ http://www.voidsapce.org.uk/python/guestbook.html
__
http://www.voidsapce.org.uk/cgi-bin/voidspace/downman.py?file=guestbook.zip
__ http://www.voidsapce.org.uk/cgi-bin/voidspace/guestbook.py
__ http://www.voidsapce.org.uk/cgi-bin/voidspace/guestbook2.py

What is the Voidspace Python Guestbook
========================================

Guestbook is a Python script that allows you to add a 'guestbook'
facility to your website. It is fully customisable using HTML templates
- so the guestbook will appear to be fully integrated with your
website. The entries are saved in a plain text file, for easy editing,
and there is a naughty word filter as well. Almost every aspect of the
appearance is editable using the templates. A few other user settings
can be configured as well. All the instructions are contained in the
template file.

It can email you when an entry is made by someone, and also features
smilies, spam protection, javascript form validation, and allows a
limited set of html in comments. It is regularly improved and updated.


What's New ?
===============

This is a major update since the last release [#]_. The new features
are :

* Javascript form validation (client side)
* More advanced anti-spam features (we do a basic check that the entry
was made by a human rather than a bot)
* A limited set of html is now allowed in entries
* Smilies !!!!
* Better use of CSS in the standard template
* Counter tells you how many times the guestbook has been viewed
* A few other bugfixes and improvements

Because of the changes there are a few external files (python modules
and javascript files) that will need to be installed, as well as the
smiley images. Full instructions come with the docs.


.. [#] Using the HTML templates
.. [#] Version 1.3.0 was the last released version. 1.4.0 did exist for
a few days before it was superceded.....



*Also*...

FireMail the firedrop plugin has been updated. It now resolves the
macros before emailing. The plugin.zip also now contains rest.py (reST
support for firedrop) which has also been updated, and the update isn't
yet included in the official distribution.

See http://www.voidspace.org.uk/python/programs.shtml#firedrop


*Also*....

A couple of new 'recipes' that *may* be of interest.

googlerank
How Well Ranked is Your Website ?
Version 0.1.0 18th April 2005
googlerank is a small recipe that uses the google api. You give it a
domain (by setting a variable), and then a set of search terms via
stdin. It then does google searches until a result from your domain is
found (so long as it is within the first 200 results - 20 searches).
This tells you how far down the list your site appears for given search
terms. This is a useful tool for working with website design - it's
also very interesting.

It produces results that look like :

For the search term "python cookies" :
Out of an estimated 176000 results.
Your website came at position "7".
With URL - "http://www.voidspace.org.uk/python/recipebook.shtml"

see : http://www.voidspace.org.uk/python/recipebook.shtml#google



CGIHTTPServerWithSSI
A Simple Server with SSI Processing
Version 0.1.0 15th April 2005
This is a simple server implementation, this one based on
CGIHTTPServer. It does everything that CGIHTTPServer does, with some
SSI processing as well. So far it handles include and flastmod, but
adding additional instructions would be easy.

Simply drop it in a directory and it will serve webpages, with that
directory as the root directory. Any pages that end in .shtml or .shtm,
it does SSI processing on.

see : http://www.voidspace.org.uk/python/recipebook.shtml#ssi



Best Regards, 


Fuzzy 
http://www.voidspace.org.uk/py?thon



From bokr at oz.net  Sat Apr  2 21:58:58 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 03 Apr 2005 02:58:58 GMT
Subject: redundant imports
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<T9OdnU9kdqI2NNffRVn-ow@powergate.ca>
	<i4V2e.1146141$35.42440149@news4.tin.it>
	<86zmwgx0he.fsf@guru.mired.org>
Message-ID: <424f52e2.157933225@news.oz.net>

On Sat, 02 Apr 2005 16:44:29 -0600, Mike Meyer <mwm at mired.org> wrote:

>"max(01)*" <max2 at fisso.casa> writes:
>
>> Peter Hansen wrote:
>>> max(01)* wrote:
>>>
>>>> hi everybody.
>>>>
>>>> suppose that code-1.py imports code-2.py and code-3.py (because it
>>>> uses names from both), and that code-2.py imports code-3.py.
>>>>
>>>> if python were c, code-1.c should only *include* code-2.c, because
>>>> the latter in turns includes code-3.c.
>>>>
>>>> inclusion of modules in c is a purely preprocessing textual matter
>>>> (compilation is deferred to after the fact), i guess, so that such
>>>> things are possible. import of modules in python is a different
>>>> beast, so the "redundancy" is (i think) necessary.
>>>>
>>>> any comment/suggestion/idea?
>>> You're mixed up about this whole idea.
>>>
>>
>> that's why i am asking for advice here.
>> my concern was motivated by a (clumsy) attempt to understand the
>> difference of mechanism between the approach to modular programming in
>> a more "traditional" language (c) and python.
>
>[Names changed to be valid python module names.]
>
>I feel I ought to point out that you don't really *have* to import the
>code_3.py in code_1.py. You can get to things code_3.py in code_1.py
>as code_2.code_3.<thing>.
>
>The semantic behavior of "include" in C is the same as "from module
Bzzt ;-) It's not the same semantics!
>import *" in python. Both cases add all the names in the included
>namespace directly to the including namespace. This usage is
But a C #include results in processing as if the _source_ were substituted
into the including source in place of the #include line. That's not what
from module import * does, because when import executes the module's source
(happening only the first time BTW, unlike in-place #include)
it creates a module global that is distinct from the includer's global.
The import * creates local bindings to the objects visible as bindings
in the global space of the module, but the objects retain their module
global references (if any, since there doesn't have to be any).

IMO execfile('module.py') is closer to C's #include effect. Note:

 >>> print '----\n%s----'%open('impex.py').read()
 ----
 g = 'g in global space of impex.py'
 def showg(): print g

 ----
 >>> from impex import *
 >>> g
 'g in global space of impex.py'
 >>> showg()
 g in global space of impex.py
 >>> g = 'g in global space of importer'
 >>> g
 'g in global space of importer'
 >>> showg()
 g in global space of impex.py

Note that showg insisted on looking for g in it's idea of global.
Now we'll bring in g and showg via execfile:
 >>>
 >>> execfile('impex.py')
 >>> g
 'g in global space of impex.py'
 >>> showg()
 g in global space of impex.py
 >>> g = 'g in global space of importer'
 >>> showg()
 g in global space of importer

Note that because execfile executed the definition of showg in the
interactive global space, it sees the interactive change of g's binding
(in what it now also showg's global space).

(Execfile inside a function or class definition needs careful control, but can be done).

>depreciated in Python, because it leads to problems figuring out where
>a specific variable came from. In C, it creates a problem called "name
>space pollution". This is the case when a file1.c gets all the symbols
>for some_header.h, even though it doesn't include/need those symbols,
>because some header file1.c included needed a symbol from
>some_header.h. This is especially galling if the pollution collides
>with some_header2.h that file1.c actually needs.
>
Of course in C you could write some #ifxxx kludges to control inclusion of named things
from a given header file somewhat. But name space pollution is a pox, to be sure ;-)

Regards,
Bengt Richter


From j.p.t.j.berends at [N0SP4M].nl  Fri Apr  8 05:38:53 2005
From: j.p.t.j.berends at [N0SP4M].nl (J Berends)
Date: Fri, 08 Apr 2005 11:38:53 +0200
Subject: 'Address already in use' when using socket
In-Reply-To: <JoCdnX6tyPoIM8jfRVn-3Q@powergate.ca>
References: <87wtretghg.fsf@gto.net> <JoCdnX6tyPoIM8jfRVn-3Q@powergate.ca>
Message-ID: <9e7e6$4256511a$82a1a4df$15818@news1.tudelft.nl>

Peter Hansen wrote:
> Bearish wrote:
> 
>> I get 'Address already in use' errors when using sockets.
> 
> 
> Generally one can fix this using:
> 
> sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
> 
> where "sock" is the server socket in question.  Do
> this prior to attempting to bind to the port.
> 
> -Peter
I agree on this, wanted to write the same thing when I saw this.


From pinard at iro.umontreal.ca  Thu Apr 14 10:07:25 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Thu, 14 Apr 2005 10:07:25 -0400
Subject: Compute pi to base 12 using Python?
In-Reply-To: <see-414FAA.23143013042005@news.frontiernet.net>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
	<see-414FAA.23143013042005@news.frontiernet.net>
Message-ID: <20050414140725.GA17342@phenix.progiciels-bpi.ca>

[Doug Schwarz]

> The chromatic scale is based on one twelfth powers of two, i.e., if
> the frequency of a note in the scale is f(n), then the frequency of
> the next note is given by f(n+1) = f(n) * 2^(1/12)

This easy view of things has been known for a long time, but has only
been popular (relatively) recently.  Traditionally, scale designers were
definitely running after rational proportions between scale notes, not
fearing some problems they necessarily create, because such scales are
often nicer and interesting to the musical ear.

I should relate this discussion to Python somehow! :-) Easy, as I have a
few Python programs doing various scale computations -- I should try to
bundle these together somewhere in my personal Web site, some day...

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From u.hobelmann at web.de  Fri Apr  1 16:59:38 2005
From: u.hobelmann at web.de (Ulrich Hobelmann)
Date: Fri, 01 Apr 2005 15:59:38 -0600
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <1498066.d23UzBfE8y@yahoo.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<1498066.d23UzBfE8y@yahoo.com>
Message-ID: <3b5ui7F6h0vgtU1@individual.net>

alex goldman wrote:
> Daniel Silva wrote:
> 
> 
>>At any rate, FOLD must fold.
> 
> 
> I personally think GOTO was unduly criticized by Dijkstra. With the benefit
> of hindsight, we can see that giving up GOTO in favor of other primitives
> failed to solve the decades-old software crisis.

The fault of goto in imperative languages is that it has no 
arguments, thus creating spaghetti of gotos and assignments.

Continuations rule!


From peter at engcorp.com  Thu Apr 28 11:21:36 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 28 Apr 2005 11:21:36 -0400
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <W47ce.375$Jb6.363@fe63.usenetserver.com>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
Message-ID: <aeGdnR0QWZ8XYu3fRVn-vg@powergate.ca>

Paul Miller wrote:
> For example, let's say I have a function which binds a key to a function 
> call. I want to do something "simple" in this function call, and I have 
> a lot of bindings, so I don't want to have a ton of tiny little 
> functions scattered around:
> 
>     def setVarTo1():
>         foo.var = 1
>     def setVarTo2():
>         foo.var = 2
> 
>     bind('a', setVarTo1)
>     bind('b', setVarTo2)
> 
> Instead, I'd like to do something like this:
> 
>     bind('a', foo.var = 1)
>     bind('b', foo.var = 2)
> 
> What's the recommended way to do something like this?

This meets your requirements as stated:

def temp():
    foo.var = 1

bind('a', temp)

def temp():
    foo.var = 2

bind('b', temp)

del temp


-Peter


From joal at bigpond.net.au  Fri Apr  1 02:45:00 2005
From: joal at bigpond.net.au (Joal Heagney)
Date: Fri, 01 Apr 2005 07:45:00 GMT
Subject: New to programming question
In-Reply-To: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
Message-ID: <0_63e.19914$C7.11056@news-server.bigpond.net.au>

Ben wrote:
> This is an exercise from the Non-programmers tutorial for Python
> by Josh Cogliati.
> 
> The exercise is:
> 
> Write a program that has a user guess your name, but they only get 3
> chances to do so until the program quits.
> 
> Here is my script:
> 
> --------------------------
> 
> count = 0
> name = raw_input("Guess my name. ")
> 
> while name != 'Ben' and count < 3:

Everything inside this loop will only occur if the name doesn't equal 
'Ben' and the count is less than 3.

>     count = count + 1

You increase the count by one, which allows your code to catch the case 
where count = 2 and now equals 3.

>     if name != 'Ben' and count < 3:
>         name = raw_input('Guess again. ')
>     elif name == 'Ben' and count < 3:
>         print "You're right!"
>     else:
>         print 'No more tries.'

Which is why you get this print message, because count is now equal to 3.

> 
> ----------------------------------
> 
> Everything works except the line:  print "You're right!"

But at no point does the program get an opportunity to print "No more 
tries.' because there is no point inside this loop where name == 'Ben'.

> Could someone tell me what is wrong and give me a better alternative to
> what I came up with.  
> 
> Thank you 
> 
> Ben

Also, you're duplicating a lot of your case testing. You check to see if 
the name is 'Ben' at the start, and then inside the loop, and the same 
for the counts.

I tried to write out a logical method of approaching this problem, but 
in truth this particular use-case isn't that simple is it?

Here's my contribution anycase:

count = 0
# Get first input
name = raw_input("Guess my name: ")
# Give the sucker two extra goes
while count < 2:
	# Check the value of name
	if name == 'Ben':
		print "You're right!"
		break
	else:
		name = raw_input("Try again: ")
# Of course, we haven't checked the sucker's last guess
# so we have to do that now.
if count == 2:
	if name == 'Ben':
		print "You're right!"
	else:
		print "No more tries for you!!!"


Hope this helps.
Joal





From mal at egenix.com  Thu Apr  7 15:17:51 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Thu, 07 Apr 2005 21:17:51 +0200
Subject: oracle interface
In-Reply-To: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <4255875F.8030600@egenix.com>

Andrew Dalke wrote:
> In searching I find there several different ways to
> connect to an Oracle server on MS Windows:
> 
>   mxODBC - http://www.egenix.com/files/python/mxODBC.html
>     built on top of the ODBC drivers for a given database

mxODBC works nicely with Oracl on Windows. There are
two options:

1. MS Oracle ODBC driver:

   This is the MS version of an ODBC driver for Oracle.
   It is well integrated into MS transaction managers,
   authentication and other MS techniques, but doesn't
   support all the the 8i and 9i features.

2. Oracle ODBC driver:

   This driver is supported by Oracle itself and does
   have support for 8i and 9i.

If these don't work for you, there are also a number
of commercial ODBC driver kits which support Oracle
from the usual suspects (OpenLink, EasySoft, DataDirect,
etc.).

Usage is pretty straightforward:

a) install the ODBC driver
b) create an ODBC data source (this connects the ODBC
   driver with the database you want to talk to)
c) install egenix-mx-base and egenix-mx-commercial
d) fire up Python...

from mx.ODBC.Windows import DriverConnect
dbc = DriverConnect("DSN=<datasourcename>;UID=<username>;PWD=<password>")
c = dbc.cursor()
c.execute('select * from mytable')
print c.fetchall()

If you like it, contact sales at egenix.com and we'll let you
know what else is needed :-)

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 07 2005)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From bgs248 at hotmail.com  Sat Apr 30 15:32:31 2005
From: bgs248 at hotmail.com (bgs)
Date: 30 Apr 2005 12:32:31 -0700
Subject: array type casting problem in scipy.interpolate
References: <42732655@news.ColoState.EDU>
Message-ID: <1114889551.101190.312080@l41g2000cwc.googlegroups.com>

The routine requires real arrays, and you are giving it one complex
one.  It does not know what to do with the complex array.  What are you
expecting it to do?  If you need the real and imaginary parts to be
separately interpolated, then split the complex array into two real
arrays and use the routine twice.



From mauriceling at acm.org  Tue Apr 26 17:33:28 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 07:33:28 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
Message-ID: <d4mc39$dl9$1@domitilla.aioe.org>

Terry Reedy wrote:

> "Maurice LING" <mauriceling at acm.org> wrote in message 
> news:d4kh4q$tqf$1 at domitilla.aioe.org...
> 
> 
>>Now I understand that Python bytecodes are only dealing with pure python 
>>source codes.
> 
> 
> Then stop blaming (machine-independent) CPython 'bytecodes' for any 
> problems you have with compiled-to-machine-language C extensions, which 
> have nothing to do with bytecodes.  Bytecodes also have nothing directly to 
> do with source-code compatibility. 
> 
> 
> 

technicalities are wrong but situation remains unchanged.

maurice


From bokr at oz.net  Thu Apr 21 13:26:40 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 21 Apr 2005 17:26:40 GMT
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>	<3cm9r2F6nif67U1@individual.net>	<d44vgg$jmr$04$1@news.t-online.com>
	<42660fc2.42093557@news.oz.net>	<d455oo$7et$02$1@news.t-online.com>
	<42662dc9.49780670@news.oz.net>	<mailman.2202.1114027350.1799.python-list@python.org>
	<pan.2005.04.20.22.50.45.945404@dalkescientific.com>
	<mailman.2205.1114042168.1799.python-list@python.org>
Message-ID: <4267dc41.159980529@news.oz.net>

On Wed, 20 Apr 2005 17:09:16 -0700, Michael Spencer <mahs at telcopartners.com> wrote:

>Andrew Dalke wrote:
>
>> I see you assume that only \w+ can fit inside of a %()
>> in a format string.  The actual Python code allows anything
>> up to the balanced closed parens.
>> 
>Gah! I guess that torpedoes the regexp approach, then.
>
>Thanks for looking at this
>
I brute-forced a str subclass that will call a mapping object's __getitem__ for both
kinds of format spec and '*' specs. Just to see what it would take. I didn't go the whole
way loking for a __format__ method on the mapping object, along the lines I suggested in
a previous post. Someone else's turn again ;-)
This has not been tested thoroughly...

The approach is to scan the original format string and put pieces into an out list
and then ''.join that for final ouput. The pieces are the non-format parts and
string from doing the formatting as formats are found. %(name) format args are
retrieved from the mapping object by name as usual, and saved as the arg for
rewritten plain format made from the tail after %(name), which is the same tail
as %tail, except that the value is already retrieved. Next '*' or decimal strings
are packed into the rewritten format, etc. The '*' values are retrieved by integer
values passed to mapobj[i] and incremented each time. If the arg value was not
retrieved by name, that's another mapobj[i]. Then the conversion is done with
the plain format. The tests have MixFmt(fmt, verbose=True) % MapObj(position_params, namedict)
and the verbose prints each rewritten format and arg and result as it appends them to out.


----< mixfmt.py >------------------------------------------------------------------------
# mixfmt.py -- a string subclass with __mod__ permitting mixed '%(name)s %s' formatting
import re
class MixFmtError(Exception): pass
    
class MixFmt(str):
    def __new__(cls, s, **kw):
        return str.__new__(cls, s)
    def __init__(self, *a, **kw):
        self._verbose = kw.get('verbose')
        
    # Michael Spencer's regex, slightly modded, but only for reference, since XXX note
    parse_format = re.compile(r'''
        (
        \%                     # placeholder
        (?:\(\w*\))?           # 0 or 1 "named" groups XXX "%( (any)(balanced) parens )s" is legal!
        [\#0\-\+]?             # 0 or 1 conversion flags
        (?:\* | \d+)?          # optional minimum conversion width
        (?:\.\* | \.\d+)?      # optional precision
        [hlL]?                 # optional length modifier
        [diouxXeEfFgGcrs]      # conversion type - note %% omitted
        )
        ''',
        re.VERBOSE)

    def __mod__(self, mapobj):
        """
        The '%' MixFmt string operation allowing both %(whatever)fmt and %fmt
        by calling mapobj[whatever] for named args, and mapobj[i] sequentially
        counting i for each '*' width or precision spec, and unnamed args.
        It is up to the mapobj to handle this. See MapObj example used in tests.
        """
        out = []
        iarg = 0
        pos, end = 0, len(self)
        sentinel = object()
        while pos<end:
            pos, last = self.find('%', pos), pos
            while pos>=0 and self[pos:pos+2] == '%%':
                pos+=2
                pos = self.find('%', pos)
            if pos<0: out.append(self[last:].replace('%%','%')); break
            # here we have start of fmt with % at pos
            out.append(self[last:pos].replace('%%','%'))
            last = pos
            plain_arg = sentinel
            pos = pos+1
            if self[pos]=='(':
                # scan for balanced matching ')'
                brk = 1; pos+=1
                while brk>0:
                    nextrp = self.find(')',pos)
                    if nextrp<0: raise MixFmtError, 'no match for "(" at %s'%(pos+1)
                    nextlp = self.find('(', pos)
                    if nextlp>=0:
                        if nextlp<nextrp:
                            brk+=1; pos = nextlp+1
                        else:
                            pos = nextrp+1
                            brk-=1
                    else:
                        brk-=1
                        pos = nextrp+1
                plain_arg = mapobj[self[last+2:pos-1]]
            # else: normal part starts here, at pos
            plain_fmt = '%'    
            # [\#0\-\+]?             # 0 or 1 conversion flags
            if pos<end and self[pos] in '#0-+':
                plain_fmt += self[pos]; pos+=1
            # (?:\* | \d+)?          # optional minimum conversion width
            if pos<end and self[pos]=='*':
                plain_fmt += str(mapobj[iarg]); pos+=1; iarg+=1
            elif pos<end and self[pos].isdigit():
                eod = pos+1
                while eod<end and self[eod].isdigit(): eod+=1
                plain_fmt += self[pos:eod]
                pos = eod
            #(?:\.\* | \.\d+)?      # optional precision
            if self[pos] == '.':
                plain_fmt += '.'
                pos +=1
                if pos<end and self[pos]=='*':
                    plain_fmt += str(mapobj[iarg]); pos+=1; iarg+=1
                elif pos<end and self[pos].isdigit():
                    eod = pos+1
                    while eod<end and self[eod].isdigit(): eod+=1
                    plain_fmt += self[pos:eod]
                    pos = eod
            #[hlL]?                 # optional length modifier
            if pos<end and self[pos] in 'hlL': plain_fmt += self[pos]; pos+=1
            #[diouxXeEfFgGcrs]      # conversion type - note %% omitted
            if pos<end and self[pos] in 'diouxXeEfFgGcrs': plain_fmt += self[pos]; pos+=1
            else: raise MixFmtError, 'Bad conversion type %r at %s' %(self[pos], pos)
            if plain_arg is sentinel: # need arg
                plain_arg = mapobj[iarg]; iarg+=1
            result = plain_fmt % (plain_arg,)
            if self._verbose:
                print '    -> %r %% %r => %r' % (plain_fmt, (plain_arg,), result)
            out.append(result)
        return ''.join(out)
 
class MapObj(object):
    """
    Example for test.
    Handles both named and positional (integer) keys 
    for MixFmt(fmtstring) % MapObj(posargs, namedict)
    """
    def __init__(self, *args, **kw):
        self.args = args
        self.kw = kw
    def __getitem__(self, i):
        if isinstance(i, int): return self.args[i]
        else: 
            try: return self.kw[i]
            except KeyError: return '<KeyError:%r>'%i

def test(fmt, *args, **namedict):
    print '\n==== test with:\n  %r\n  %s\n  %s' %(fmt, args, namedict)
    print MixFmt(fmt, verbose=True) % MapObj(*args, **namedict)

def testseq():
    test('(no %%)')
    test('%s', *['first'])
    test('%(sym)s',**dict(sym='second'))
    test('%s %*.*d %*s', *['third -- expect "   012   ab" after colon:', 5, 3, 12, 4, 'ab'])
    test('%(arg1)s %% %(arg2).*f %()s %s', *[3, 'last'], **{
        'arg1':'fourth -- expect " % 2.220 NULL? last" after colon:', 'arg2':2.22, '':'NULL?'})
    #'%s %*.*d %*s', *['expect "  345  ab"??:', 2, 1, 12345, 4, 'ab'])
    test('fifth -- non-key name: %(this(is)a.--test!)s') 

if __name__ == '__main__':
    import sys
    if not sys.argv[1:]:
        raise SystemExit,'Usage: python24 mixfmt.py -test | fmt ([key =] (s | (-i|-f) num)+ )*'
    fmt, rawargs =  sys.argv[1], iter(sys.argv[2:])
    if fmt == '-test': testseq(); raise SystemExit
    args = []
    namedict = {}; to_name_dict=False
    for arg in rawargs:
        if arg == '-i': arg = int(rawargs.next())
        if arg == '-f': arg = float(rawargs.next())
        if arg == '=': to_name_dict = True
        elif to_name_dict: namedict[args.pop()] = arg; to_name_dict=False
        else: args.append(arg)
    test(fmt, *args, **namedict)
-----------------------------------------------------------------------------------------
Result of py24 mixfmt.py -test:

[10:06] C:\pywk\pymods>py24 mixfmt.py -test

==== test with:
  '(no %%)'
  ()
  {}
(no %)

==== test with:
  '%s'
  ('first',)
  {}
    -> '%s' % ('first',) => 'first'
first

==== test with:
  '%(sym)s'
  ()
  {'sym': 'second'}
    -> '%s' % ('second',) => 'second'
second

==== test with:
  '%s %*.*d %*s'
  ('third -- expect "   012   ab" after colon:', 5, 3, 12, 4, 'ab')
  {}
    -> '%s' % ('third -- expect "   012   ab" after colon:',) => 'third -- expect "   012   ab"
after colon:'
    -> '%5.3d' % (12,) => '  012'
    -> '%4s' % ('ab',) => '  ab'
third -- expect "   012   ab" after colon:   012   ab

==== test with:
  '%(arg1)s %% %(arg2).*f %()s %s'
  (3, 'last')
  {'': 'NULL?', 'arg1': 'fourth -- expect " % 2.220 NULL? last" after colon:', 'arg2': 2.2200000
000000002}
    -> '%s' % ('fourth -- expect " % 2.220 NULL? last" after colon:',) => 'fourth -- expect " %
2.220 NULL? last" after colon:'
    -> '%.3f' % (2.2200000000000002,) => '2.220'
    -> '%s' % ('NULL?',) => 'NULL?'
    -> '%s' % ('last',) => 'last'
fourth -- expect " % 2.220 NULL? last" after colon: % 2.220 NULL? last

==== test with:
  'fifth -- non-key name: %(this(is)a.--test!)s'
  ()
  {}
    -> '%s' % ("<KeyError:'this(is)a.--test!'>",) => "<KeyError:'this(is)a.--test!'>"
fifth -- non-key name: <KeyError:'this(is)a.--test!'>

You can also run it interactively with one format and some args, e.g.,

[10:25] C:\pywk\pymods>py24 mixfmt.py
Usage: python24 mixfmt.py -test | fmt ([key =] (s | (-i|-f) num)+ )*

[10:25] C:\pywk\pymods>py24 mixfmt.py "%*.*f %(hi)s" -i 6 -i 3 -f 3.5 hi = hello

==== test with:
  '%*.*f %(hi)s'
  (6, 3, 3.5)
  {'hi': 'hello'}
    -> '%6.3f' % (3.5,) => ' 3.500'
    -> '%s' % ('hello',) => 'hello'
 3.500 hello


Regards,
Bengt Richter


From codecraig at gmail.com  Thu Apr 21 12:54:41 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 09:54:41 -0700
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <d48ktk$4ov$1@news.vcd.hp.com>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
	<TIOdnQkhrMfcTPrfRVn-uA@telcove.net> <d48ktk$4ov$1@news.vcd.hp.com>
Message-ID: <1114102481.963973.252500@g14g2000cwa.googlegroups.com>

I found some benchmarking (perhaps simple) but search for "The Great
Computer language shootout" ....look at the original shootout and the
win32 one.

Thomas:
"I doubt the total execution time for all the RegEx queries you ever
ran took
as much time as you just wasted on your little experiment. " .....no
need to be angry.  I don't have some "little experiment", but thanks
for being concerned about me wasting my time.

I do understand that python is certainly easier to read, no doubt.  I
was just doing some research to find out about speed/performance
between the two.

But thanks for pointing out, again, that Pyton is easier to read.
(let's just not forget that python is great for other things other than
just readability.)



From claudio.grondi at freenet.de  Tue Apr 26 08:28:56 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 26 Apr 2005 12:28:56 -0000
Subject: from comp.ai.vision - beside C also Python code included
Message-ID: <3d6jgjF6i2pvtU1@individual.net>

From: Thomas Deselaers <deselaers at informatik.rwth-aachen.de>
Subject: Q&A  : FIRE (Flexible Image Retrieval Engine) sources available

 FIRE is an extensible image retrieval engine that was developed to
 investigate the impact of different features for content-based image
 retrieval. The system was used in the 2004 ImageCLEF evaluation and
 obtained the best results for the medical task using only visual
 information. The system also gives very good results for general color
 photographs using invariant color features and Tamura texture
 histograms.

 FIRE contains lots of different feature extraction tools, distance
 measures, and tools for performance evaluation.

 The source code, a demo, and further information about FIRE is available
 online at

 http://www-i6.informatik.rwth-aachen.de/~deselaers/fire.html





From greg at cosc.canterbury.ac.nz  Wed Apr 20 01:53:00 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 17:53:00 +1200
Subject: def a((b,c,d),e):
In-Reply-To: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
Message-ID: <3cm929F64ls55U1@individual.net>

AdSR wrote:
> if you haven't done so yet. It appears that you can specify a function
> explicitly to take n-tuples as arguments.
> 
> Has anyone actually used it in real code?

Yes. In PyGUI I have some point and rectangle manipulation
utilities that do things like

   def add_pt((x1, y1), (x2, y2)):
     return (x1 + y1, x2 + y2)

In cases like this, it can help to make things more concise
and probably also slightly more efficient.

 > it looks like one of those language features that make
 > committing atrocities an order of magnitude easier.

I don't remember ever being seriously burned by using it.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From bokr at oz.net  Thu Apr  7 20:55:41 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 08 Apr 2005 00:55:41 GMT
Subject: How to name Exceptions that aren't Errors
References: <3blfl8F6gt80jU1@individual.net>
	<mailman.1502.1112902903.1799.python-list@python.org>
Message-ID: <4255d539.584516580@news.oz.net>

On Thu, 07 Apr 2005 15:40:24 -0400, Steve Holden <steve at holdenweb.com> wrote:

>Leo Breebaart wrote:
>> I've recently become rather fond of using Exceptions in Python to
>> signal special conditions that aren't errors, but which I feel
>> are better communicated up the call stack via the exception
>> mechanism than via e.g. return values.
>> 
>Absolutely.
>
>> For instance, I'm thinking of methods such as:
>> 
>> 
>>     def run(self):
>>     """ Feed the input file to the simulator. """
>> 
>>         for linenr, line in enumerate(self.infile):
>>             try:
>>                 current_values = self.parse_line(linenr, line)
>> ==>         except CommentLineException:
>>                 continue
>>             results = self.do_one_simulation_step(current_values)
>>             self.process_simulation_results(results)
>> 
>> 
>> which I use in order to discard comments from a file I'm parsing
>> line-by-line.

It also possible for exception arguments to deliver a result, rather
than indicate something rejected. E.g., you can terminate a recursive
search via an exception. If no exception occurs, you have gone through
the entire search space and not met the solution criterion.

Regards,
Bengt Richter


From jepler at unpythonic.net  Thu Apr  7 12:11:04 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 7 Apr 2005 11:11:04 -0500
Subject: Read 16 bit integer complex data
In-Reply-To: <1112887876.272539.277420@z14g2000cwz.googlegroups.com>
References: <1112887876.272539.277420@z14g2000cwz.googlegroups.com>
Message-ID: <20050407161103.GG12835@unpythonic.net>

You may want to use the 'numeric' or 'numarray' extensions for this.
The page on numarray is here:
    http://www.stsci.edu/resources/software_hardware/numarray

numarray doesn't support "complex 16-bit integer" as a type, but you can
get a complex, floating-point valued array from your integer values.
Here's how, with a bit of explanation along the way:

I created a small example: a vector of 2 "complex 16-bit integers" 
in the native byte-order.
>>> s = struct.pack("hhhh", 1, 2, 3, 4)
>>> s
'\x01\x00\x02\x00\x03\x00\x04\x00'
I think this stands for the vector <1+2j, 3+4j> according to what you
wrote.

I can turn this into a 4-element numarray like so:
>>> numarray.fromstring(s, "s")
array([1, 2, 3, 4], type=Int16)
and extract the real and complex parts with extended slices:
>>> t[1::2] # take the items 1, 3, ..., 2*n+1 i.e., the complex parts
array([2, 4], type=Int16)

This expression forms the complex 64-bit floating point 2-element array
from 't':
>>> u = t[0::2] + t[1::2] * 1j
>>> u
array([ 1.+2.j,  3.+4.j])

If the byte-order of the file is different from the native byte order,
you can byte-swap it before forming the complex FP array:
>>> t.byteswap()
>>> t
array([ 256,  512,  768, 1024], type=Int16)


Jeff
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From mauriceling at acm.org  Thu Apr 28 22:47:12 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 29 Apr 2005 12:47:12 +1000
Subject: New Python website
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
	<mailman.17.1114741242.14961.python-list@python.org>
Message-ID: <d4s77g$g4t$1@domitilla.aioe.org>

Michael Soulier wrote:

> On 28 Apr 2005 17:45:02 -0700, lpe <lpe at pycode.com> wrote:
> 
>>http://www.pycode.com
>>
>>I was kinda suprised when I could not find any good sites with 3rd
>>party modules (other than the Vaults of Parnassus, where you must host
>>files elsewhere), so I decided to write one myself :)
>>It is brand new and might still be buggy, but hopefully it will be
>>usefull to some people.  Feel free to join and upload any of your code.
>>thanks
> 
> 
> Something wrong with PyPi?
> 
> Mike
> 

I think it is quite clear when he says "I could not find any good sites 
with 3rd party modules (other than the Vaults of Parnassus, where you 
must host files elsewhere)", suggesting that he is looking for a site 
whereby 3rd party modules can be hosted, rather than a site telling you 
where 3rd party modules are hosted.

maurice


From mwm at mired.org  Mon Apr 25 10:15:36 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 09:15:36 -0500
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
Message-ID: <868y37osc7.fsf@guru.mired.org>

"googleboy" <mynews44 at yahoo.com> writes:

> Hi there.
>
> I am writing a little app tha tI would like to make cross-platform
> (debian, RH, Fedora, Solaris, AIX, etc)
>
> Originally I decided to check what uname returned, as I didn't think it
> mattered beyond the detail of Linux or SunOS etc.
>
> Recently I have learned that FC3 breaks my script,  so I need to be
> able to determine not simply "Linux" but to know exactly what unix the
> script is being run on.

Anyway, checking the system name is the wrong way to build portable
programs. For one thing, as you've discovered, new systems won't work
properly. For another, upgrades to existing systems may break things
as well.

What you should do instead is check on how to use the features you
want. If you watch a typical autoconf script, you'll see it groveling
through libraries, include files, and various directories looking for
subroutines, defines and commands. That's the idea, but without
knowing which features you're looking for, I can't say how you would
check for them.

This takes more time to write, but results in more robust code. For
instance, if some distribution changes one of the features to mimic a
"better" distribution that you already support, instead of your script
breaking, it'll just work. This is much better than having to teach
your script how to distinguish between versions of distributions.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From martin at v.loewis.de  Sun Apr 24 12:18:34 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 24 Apr 2005 18:18:34 +0200
Subject: Unicode problems, yet again
In-Reply-To: <d4fp1v$3n5$1@bagan.srce.hr>
References: <d4eruk$gns$1@bagan.srce.hr>
	<171m61pido84fckea94h8231j8n077qt8k@4ax.com>
	<d4fp1v$3n5$1@bagan.srce.hr>
Message-ID: <426bc6db$0$10299$9b622d9e@news.freenet.de>

Ivan Voras wrote:
> Sorry, that was just steam venting from my ears - I often get bitten by
> the "ordinal not in range(128)" error. :)

I think I'm glad to hear that. Errors should never pass silently, unless
explicitly silenced. When you get that error, it means there is a bug in
your code (just like a ValueError, a TypeError, or an IndexError). The
best way to deal with them is to fix them.

Now, the troubling part is clearly that you are getting *bitten* by
this specific error, and often so. I presume you get other kinds of
errors also often, but they don't bite :-) This suggests that you should
really try to understand what the error message is trying to tell so,
and what precisely the underlying error is.

For other errors, you have already come to an understanding what they
mean: NameError, ah, there must be a typo. AttributeError on None, ah,
forgot to check for a None result somewhere. ordinal not in range(128),
hmm, let's try different variations of the code and see which ones
work. This is going to continue biting you until you really understand
what it means.

The most "sane" mental model (and architecture) is one where you always
have Unicode strings in your code, and decode/encode only at system
interfaces (sockets, databases, ...). It turns out that the database
you use already follows this strategy (i.e. it decodes for you), so
you now only need to design the other interfaces so it is clear when
you have Unicode characters and when you have bytes.

Regards,
Martin


From anthra.norell at tiscalinet.ch  Sat Apr 30 17:19:00 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Sat, 30 Apr 2005 23:19:00 +0200
Subject: Data smoothing algorithms? - Thank you all
References: <000c01c54c38$313eb580$0201a8c0@mcuf7><mailman.37.1114800769.14961.python-list@python.org>
	<MLGdnZTDLvEpGe_fRVn-rw@comcast.com>
Message-ID: <00a201c54dca$3a936d40$0201a8c0@mcuf7>

Thank you all for your solutions! The moving average filter will surely do.
I will take a closer look at SciPy, though. The doc is impressive. I believe
it's curve fitting I am looking for rather than interpolation. There's a
chapter on that too.

Frederic


----- Original Message -----
From: "Larry Bates" <lbates at syscononline.com>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Friday, April 29, 2005 9:02 PM
Subject: Re: Data smoothing algorithms?


> Sounds like what you are looking for is spline interpolation.
> Given a set of datapoints is passes spline curves through
> each point giving you smooth transitions.  Did a lot of this
> in Fortran MANY years ago.
>
> Google turned up:
>
> http://www.scipy.org/documentation/apidocs/scipy/scipy.interpolate.html
>
> http://cmp.felk.cvut.cz/~kybic/thesis/pydoc/bigsplines.html
>
> http://www.mirror5.com/software/plotutils/plotutils.html
>
> Good Luck
> Larry Bates
>
> John J. Lee wrote:
> > "Anthra Norell" <anthra.norell at tiscalinet.ch> writes:
> >
> >
> >>Hi,
> >>
> >>The following are differences of solar declinations from one day to
> >>the next, (never mind the unit). Considering the inertia of a
> >>planet, any progress of (apparent) celestial motion over regular
> >>time intervals has to be highly regular too, meaning that a plot
> >>cannot be jagged. The data I googled out of Her Majesty's Nautical
> >>Almanac are merely nautical precision and that, I suppose, is where
> >>the jitter comes in. There's got to be algorithms out there to iron
> >>it out. If it were a straight line, I could do it. But this, over
> >>the whole year, is a wavy curve, somthing with a dominant sine
> >>component. Suggestions welcome.
> >
> >
> > The important thing is to have a (mathematical, hopefully) model of
> > how you expect the data to vary with time.  Start from there, and
> > then, for example, use regression to fit a curve to the data.
> >
> > The "Numerical Recipes" (Press et al.) book is popular and IMHO is a
> > good place to learn about these things (comes in several language
> > flavours, including Fortran and C -- sadly no Python AFAIK), though
> > the implementations aren't a great choice for serious "production"
> > use, according to those in the know.
> >
> > OTOH, there are quick and dirty methods that don't involve any model
> > worth speaking of -- and Press et al. covers those too :-)
> >
> >
> > John
> >
> --
> http://mail.python.org/mailman/listinfo/python-list



From bokr at oz.net  Tue Apr 19 01:02:10 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 05:02:10 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <mailman.2065.1113858260.1799.python-list@python.org>
Message-ID: <42648ee7.317700188@news.oz.net>

On Mon, 18 Apr 2005 14:06:08 -0700, "Robert Brewer" <fumanchu at amor.org> wrote:

>Reinhold Birkenfeld wrote:
>> >y =3D (f(11, 22, x=3D1, y=3D'y for f') *
>> >     g(*args_from_somewhere,
>> >       x=3D'x for g', y=3D'y for g',
>> >       foo=3Dlambda: return 'foo for g'))
>> >
>> >would be my current way to express this. But still, the less lines,
>> >the less confusing it is.
>
>And Ron Adam replied:
>> I would probably do it this way.
>>=20
>> y =3D f(11, 22, x=3D1, y=3D'y for f') 		\
>>          * g( *args_from_somewhere,
>>               x=3D'x for g',=20
>>               y=3D'y for g',
>>               foo=3Dlambda: return 'foo for g' )
>
>Which are both prettier, until you actually try to use them:
>
>>>> g( *args_from_somewhere, x=3D'x for g', y=3D'y for g', foo=3Dlambda:
>return 'foo for g' )
>Traceback (  File "<interactive input>", line 1
>    g( *args_from_somewhere, x=3D'x for g', y=3D'y for g', foo=3Dlambda:
>return 'foo for g' )
>                             ^
>SyntaxError: invalid syntax
>
>
I had a bug too ;-/ No returns in lambda ;-)
Other than that, it compiles, so I suspect the
visual structure helped, even if not so pretty.

Regards,
Bengt Richter


From greg at cosc.canterbury.ac.nz  Tue Apr 19 22:24:56 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 14:24:56 +1200
Subject: eval function not working how i want it dag namn
In-Reply-To: <1113608512.081043.168400@g14g2000cwa.googlegroups.com>
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
	<d3olf8$7s7$1@gemini.csx.cam.ac.uk>
	<d3on01$cq8$02$2@news.t-online.com>
	<d3p29c$4rn$1@gemini.csx.cam.ac.uk>
	<1113608512.081043.168400@g14g2000cwa.googlegroups.com>
Message-ID: <3clssbF6p180fU1@individual.net>

robcarlton wrote:
> thanks. I'll use the getattr function now, and I think I understand
> where I went wrong with eval. I was thinking in Lisp where the lexical
> scope would mean that obj is defined

The full story is actually more subtle. The name 'obj'
*is* accessible from a nested scope if you do something
like

   def f(obj):
     def g():
       print obj
     g()

But the bytecode compiler has to do extra work to make
a name in an intermediate scope accessible to an inner
scope, and it only does this if it sees a reference to
the name in the inner scope. In your code, the reference
is invisible at compile time, so the compiler misses it,
and the run-time evaluation fails.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From jhargraveiii at msn.com  Fri Apr  1 23:12:15 2005
From: jhargraveiii at msn.com (Jim Hargrave)
Date: Fri, 01 Apr 2005 23:12:15 -0500
Subject: Python plug-in Frameworks like Eclipse RCP...
In-Reply-To: <mLidnbmI_5AzzNbfRVn-jQ@comcast.com>
References: <mLidnbmI_5AzzNbfRVn-jQ@comcast.com>
Message-ID: <yuCdnYkIPpMBhtPfRVn-tA@comcast.com>

Hum, maybe my question was too specific. What I would really like to 
know is what is the best way to implement a Python application with a 
pluggable architecture. In particular, I would like to use wxPython and 
have plug ins automatically register themselves with the GUI by adding 
themselves to the mean or adding a tab. Again this is much like Eclipse 
RCP - but forget that part :-)

J



Jim Hargrave wrote:
> Eclipse provides a very nice application framework which supports 
> plug-ins. It's easy to dynamically add new functionality, menu items, 
> property editors, options etc.. using a combination of XML and Java code.
> 
> Is there a similar framework for Python? If not any hints on how such a 
> framework would be implemented?
> 
> I'm building a client side tool using Python/wxPython for our 
> translators and would like to have a pluggable architecture similar to 
> Eclipse RCP
> 
> 
> thanks!


From kkrueger at example.edu  Thu Apr 21 20:33:00 2005
From: kkrueger at example.edu (Karl A. Krueger)
Date: Fri, 22 Apr 2005 00:33:00 +0000 (UTC)
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<mailman.2257.1114123310.1799.python-list@python.org>
Message-ID: <d49gns$cv6$1@baldur.whoi.edu>

Terry Reedy <tjreedy at udel.edu> wrote:
> Depending upon you particular application, 'completeness' may be a
> more relevant concern than 'performance'.  I believe the original
> Python regex engine did not have all the Perl extensions, some of them
> decidedly 'non regular'.  It was replace by the 'perl-compatible regex
> engine' (pcre or pre), written in C by a non-pythonista so that other
> languages/applications, like Python, could drop it in and have what
> the title claimed -- perl-like re capability.

By way of comparison, there do exist at least some Perl-compatible regex
libraries in other non-Perl languages, which don't use libpcre.

An example is CL-PPCRE (http://www.weitz.de/cl-ppcre/), which claims to
be "more compatible with the regex semantics of Perl 5.8.0 than, say,
Perl 5.6.1 is."

-- 
Karl A. Krueger <kkrueger at example.edu> { s/example/whoi/ }


From harold.fellermann at upf.edu  Wed Apr  6 14:11:08 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Wed, 6 Apr 2005 20:11:08 +0200
Subject: richcmpfunc semantics
Message-ID: <52cccc58d7ef2924d653acaf1f8690f1@upf.edu>

Hi all,

I want to implement rich comparision in an extension class. Problem is 
I cannot
find good documentation of the richcmpfunc semantics. Given the 
signature

richcmpfunc compare(PyObject *,PyObject, int);

I supposed the two objects passed are the ones to be compared.
What is the meaning of the integer argument? Does it specify the kind
of comparision operator (e.g. __eq__ or __le__), and if so, how?
What is my richcmpfunc supposed to return? 0 or 1 indicating False or
True? What has to be done, if the function is invoked for an operator
I don't want to define?

Maybe there is some good documentation available, but I cannot find it.
So, any references or help is appreciated.

Cheers,

- harold -

--
"Scientist are very good in answering the questions
they choose to answer."
-- Richard Alley



From fuzzyman at gmail.com  Tue Apr  5 11:14:43 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Apr 2005 08:14:43 -0700
Subject: Python Google Server
In-Reply-To: <mailman.1389.1112713620.1799.python-list@python.org>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<mailman.1375.1112701816.1799.python-list@python.org>
	<1112706994.922193.5610@z14g2000cwz.googlegroups.com>
	<mailman.1389.1112713620.1799.python-list@python.org>
Message-ID: <1112714083.674249.44370@g14g2000cwa.googlegroups.com>

Of course - sorry. Thanks for the fix. Out of interest - why are you
using this... just for curiosity, or is it helpful ?

Regards,


Fuzzy
http://www.voidspace.org.uk/python



From gsakkis at rutgers.edu  Sat Apr  2 13:23:53 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 2 Apr 2005 10:23:53 -0800
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
Message-ID: <1112466233.403989.125810@l41g2000cwc.googlegroups.com>

It turns out it's not a "how to inflate tires with a hammer" request;
I've actually written an optional type checking module using
decorators. The implementation details are not easy to grok, but the
usage is straightforward:

from typecheck import *
@returns(listOf(int, size=3))
@expects(x=str, y=containerOf(int))
def foo(x,y):
    return [len(x)] + list(y)

>>> foo('1',[2,3])
[1, 2, 3]
>>> foo('1',(2,3))
[1, 2, 3]
>>> foo(1,[2,3])
Traceback (most recent call last):
...
TypeError: str expected (int given)
>>> foo('1',[2,'3'])
Traceback (most recent call last):
...
TypeError: container<int> expected ([2, '3'] given)
>>> foo('1',[2,3,4])
Traceback (most recent call last):
...
TypeError: container of size 3 expected ([1, 2, 3, 4] given)


George



From mehmetmutigozel at gmail.com  Fri Apr 22 18:18:53 2005
From: mehmetmutigozel at gmail.com (mehmetmutigozel at gmail.com)
Date: 22 Apr 2005 15:18:53 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
Message-ID: <1114208333.622909.179640@l41g2000cwc.googlegroups.com>

Thanx for your replies.

I'm looking for array of functions.
Something like a=[ sin(x) , cos(x) ]

>>> x=0.0
>>> a
[0, 1]
>>> x=1.0
>>> a
...

of course it can be made by
>>> def cratearray(x):
...           ~~~~
...           return a
a=createarray(1.0)

but this isn't what i am asking for. something automized.



From cjbottaro at alumni.cs.utexas.edu  Fri Apr  8 14:44:45 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Fri, 08 Apr 2005 13:44:45 -0500
Subject: base64 interoperability
Message-ID: <d36j9a$b23$1@sea.gmane.org>

Python's base64 module encodes and decodes differently than PHP's.  Python's
docs says that it ahere's to RFC1521 (sept 1993), while PHP's adheres to
RFC2045 (nov 1996).  Is there any Python module that uses the new standard? 
Why is Python using the old standard anyways?

Thanks.



From tjreedy at udel.edu  Fri Apr  1 11:28:44 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 11:28:44 -0500
Subject: property and virtuality
References: <mailman.1128.1112268435.1799.python-list@python.org>
	<d3322b8e9c17c6f6827db716cfbaac12@upf.edu>
Message-ID: <d2jsp8$4na$1@sea.gmane.org>


"harold fellermann" <harold.fellermann at upf.edu> wrote in message 
news:d3322b8e9c17c6f6827db716cfbaac12 at upf.edu...
> I asked this question some time ago, but as I got no answer, so I just 
> try it a second time.

This did get out, but I can't answer except to suggest looking at code for 
other C extension modules.  Nested (inner) classes are fairly rare, but I 
presume that once you know how to add attributes in general, you add class 
as an attribute in the same way you would add an int, etc, as an attribute. 
(And if I am wrong, you should certainly get another response '-).

Terry J. Reedy







From sabbey at u.washington.edu  Sat Apr 16 17:01:56 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 14:01:56 -0700
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <3cc186F6lodv5U1@individual.net>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
Message-ID: <Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>

Reinhold Birkenfeld wrote:
> Brian Sabbey wrote:
>> Here is a pre-PEP for what I call "suite-based keyword arguments". The
>> mechanism described here is intended to act as a complement to thunks.
>> Please let me know what you think.
>>
>> Suite-Based Keyword Arguments
>> -----------------------------
>>
>> Passing complicated arguments to functions is currently awkward in Python.
>> For example, the typical way to define a class property winds up polluting
>> the class's namespace with the property's get/set methods.  By allowing
>> keyword arguments to be defined in a suite following a function call,
>> complicated arguments can be passed in a cleaner, easier way.
>>
>> Examples
>> ========
>>
>> Using suite-based keyword arguments, the code
>>
>> f(x = 1)
>>
>> is equivalent to
>>
>> f():
>>     x = 1
>
> Pretty cool, but it interferes with current suites.
>
> How would you write
>
> if f(x=1):
>    print "yes"
>
> using suite-based keyword args?
>
> Reinhold
>

You wouldn't be able to use suite keywords in that situation.  Also, one 
would not be able to use suite keywords when there is more than one 
function call on the same line:

y = f()*g():
  	x = 1    # ??  not allowed

There is only so much suites can do.  Cases in which you want to do both 
are probably far enough between that it seems acceptable to me to require 
two suites:

t = f():
          x = 1
if t:
          y = 1

In general, I think that anything more than just a function call with an 
optional assignment should be disallowed:

y = [f()]:      #  ? probably shouldn't be allowed
  	x = 1

-Brian


From ojokimu at yahoo.co.uk  Thu Apr 28 16:44:13 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Thu, 28 Apr 2005 21:44:13 +0100 (BST)
Subject: kdialog and unicode
Message-ID: <20050428204413.91626.qmail@web26810.mail.ukl.yahoo.com>

Matt wrote:
> Interesting - this displays correctly when I run the above code from
a
> python shell.  However, when I run it as a superkaramba theme (which
is
> a wrapper interface to some kde functions, but allegedly passes
> straight python functions direct to the python interpreter), it shows
> up as letters, with &nnn (where nnn is a number) instead of the \xc4
> etc.  I need to do some more investigating of this with the
> superkaramba developers, and my own machine to see where the problem
> lies - clearly it's not in the code I'm using - there's either
> something wrong on my machine, or wrong with the way superkaramba
> passes this code to the python interpreter.

If xml character escapes are showing up in the output, it suggests the
input is being treated as plain-text, rather than as rich-text (i.e.
markup). In order for kdialog to guess that the input is markup, it
needs to find some sort of tag before the first line-break. That is why
I used P tags to enclose the polish text in my example - you didn't
leave these off when you tried it out with superkaramba, did you? What
exactly *is* the code you are running?

BTW, if you want more details on kdialog's markup handling, try this
reference from the qt docs:

http://doc.trolltech.com/qstylesheet.html

HTH

John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From fdreger at amiga.pl  Sat Apr 23 12:28:13 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Sat, 23 Apr 2005 18:28:13 +0200
Subject: func_code vs. string problem
Message-ID: <d4dtar$4f4$1@nemesis.news.tpi.pl>

Each function has a func_code property that is suposed to contain the 
pure bytecode of the function. All the context (including reference to 
relevant namespaces) is stored in different fields of the function 
object. Since 'exec' is able to execute any string or bytecode in the 
current scope, it would seem possible to execute code of any function 
in any namespace. But no matter how I tried, I could not do it. There 
must be something I am missing.
Here's what I do:    (if anyone wants to help, I placed the source 
under http://www.bajobongo.net/foo.py - tested on Python 2.4.1)

1. I declare a function. In the next steps I will try to run its code 
from inside a class:

def myfunction():
   print abc
   self.test()

2. I declare a class foo, with two methods. The first one tries to 
reach some local variables from a string passed to exec. The other one 
tries to do the same from inside a bytecode (from myfunction). IMHE 
this should make no difference to 'exec' - [spoiler: it does].

class foo:
   def test(self):
      print "ABC"
   def checkfunction(self):
      abc=10
      exec myfunction.func_code
   def checkstring(self):
      abc=10
      exec "print abc;self.test()"

3. I test the both methods. Sadly, the 'checkfunction' fails to find 
the correct namespace (id does not see 'abc' nor 'self'). Adding 
things like:
"exec myfunction.func_code in globals(),locals()" does not help.

i=foo()
i.checkstring()
i.checkfunction()  # this throws exception; why???

4. I try to find some help here, and hope to also gain better 
undesrtanding of how Python works :-)

Thanks for any suggestions,
regards,
Filip Dreger 




From steve at holdenweb.com  Wed Apr 13 07:22:27 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 07:22:27 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <1113388891.512839.111250@f14g2000cwb.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>	<mailman.1819.1113380033.1799.python-list@python.org>
	<1113388891.512839.111250@f14g2000cwb.googlegroups.com>
Message-ID: <d3iv6u$ld7$1@sea.gmane.org>

runes wrote:
> Seems like criticising the manual is som kind of heresy.  So be it.
> 
Don't think so, but this being open source I suspect that Fredrik was 
trying to get them improved.

> You know, the Re documentation contains many pages. Ufortunately I
> didn't dwell with the first introductory paragraph, I was trying to
> solve a particular problem. I'm not that used to looking for links to
> external sources in the manual either. Unable? I wasn't looking for a
> Howto in the manual. And frankly, 'python regex howto" in Google is
> quicker way.
> 
Right, so you found what you needed, you just think it should be 
referenced from the main docs. I think this is a good idea.

> Of course I cannot suggest a better place for the link.
> 
Come on, of course you can. All you need to say is whereabouts in the re 
  documentation it should mention the How-To.

> Writing technical documents always trigger the question: Who is the
> audience. I accept that I may not be the primary audience.  If I should
> suggest anything, it would be that the examples section is expanded.
> 
Again, you would be a good candidate to suggest changes, since you've 
just been learning that part of Python.

> Generally: I have got my experiences with the Python Manual over the
> the last 30 months Python beeing my preferred language. One of them is
> that I have to look elsewhere.
> 
But anyone is allowed to suggest improvements. Please don't be deterred 
because you think people were trying to put you off. The documentation 
contains links for suggesting improvements. That is a working channel 
for criticism and suggestion (and it's how many others first got their 
names in the python documentation, including myself). See

   http://docs.python.org/doc/doc.html
   http://docs.python.org/doc/about.html

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From littlejohn.75 at news.free.fr  Mon Apr 18 15:02:31 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 18 Apr 2005 19:02:31 GMT
Subject: packages
References: <mailman.2058.1113848973.1799.python-list@python.org>
Message-ID: <42640447$0$24669$626a14ce@news.free.fr>

Le Mon, 18 Apr 2005 20:29:39 +0200, Mage a ?crit :
>        Hello,
> 
> I read about modules and packages in the tutorial. I think I understand
> how to use packages and modules, even I know how to create a module (as
> far I understand it's a simple .py) file , but I don't know how can I
> create a package and when should I do it.
The standard library contains some packages : email, xml, distutils ...
Read the __init__.py in the directory "package-name".
> 
> Where should I look for more information?
> 
>        Mage
> 
example of use :
import distutils
help(distutils)
help(distutils.sysconfig)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'sysconfig'
import distutils.sysconfig
help(distutils.sysconfig)
distutils.sysconfig.get_python_lib(standard_lib=True)
'/home/fp2x/local/lib/python2.4'
distutils.sysconfig.get_python_lib(standard_lib=False)
'/home/fp2x/local/lib/python2.4/site-packages'




From simon.brunning at gmail.com  Mon Apr  4 08:49:43 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 4 Apr 2005 13:49:43 +0100
Subject: (win32) speedfan api control
In-Reply-To: <3b8m2tF6enbpaU1@individual.net>
References: <Kln3e.13905$e06.7165@twister.socal.rr.com>
	<3b8m2tF6enbpaU1@individual.net>
Message-ID: <8c7f10c60504040549121c7d97@mail.gmail.com>

On Apr 3, 2005 1:52 AM, Claudio Grondi <claudio.grondi at freenet.de> wrote:
> May I ask how did you get the
> "TJvXPCheckbox" and the other
> values necessary to access the program
> GUI ? (as I can see, there is no source
> code of SpeedFan available) ?

Winspector is good for this kind of thing.

http://www.brunningonline.net/simon/blog/archives/001320.html

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From serpent17 at gmail.com  Mon Apr 18 13:45:34 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 18 Apr 2005 10:45:34 -0700
Subject: Problem with unpack hex to decimal
In-Reply-To: <3cgmfsF6hud65U1@individual.net>
References: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>
	<d3ueer$avn$1$8302bc10@news.demon.co.uk>
	<3cgmfsF6hud65U1@individual.net>
Message-ID: <1113846334.680404.284180@z14g2000cwz.googlegroups.com>

Thank you all very much. It looked like I was not the only one
confused.

Jake.



From lbates at syscononline.com  Tue Apr  5 08:43:01 2005
From: lbates at syscononline.com (Larry Bates)
Date: Tue, 05 Apr 2005 07:43:01 -0500
Subject: copying a file in the python script
In-Reply-To: <1112678460.464474.82610@z14g2000cwz.googlegroups.com>
References: <1112678460.464474.82610@z14g2000cwz.googlegroups.com>
Message-ID: <2ZadndRAcawiGs_fRVn-ig@comcast.com>

If you are moving the file to another directory on the same hard
drive (e.g. same filesystem) you can use os.rename(old, new) and
the file doesn't have to be copied at all. This is more efficient.
If you are copying to another filesystem, you must use shutil.copy
and os.remove (or os.unlink).

Larry Bates


Raghul wrote:
> hi
>    I am having a problem. I want to copy a file from the folder and
> paste it or move it to another folder. Is it possible in python?
> Actually I need to implement this in the zope for my site. When I click
> any file it should move or copied to another folder in the same machine
> using zope.
> 
> Thanks in advance.
> 


From polykrombelcentercom  Fri Apr 29 14:11:28 2005
From: polykrombelcentercom (Exeem (at dot))
Date: Fri, 29 Apr 2005 20:11:28 +0200
Subject: [newbie] Embedding Flash OCX object
Message-ID: <xeidnY1zZ8VM5e_fRVnyuA@scarlet.biz>


Hi All,

I'm trying to find a way to embbed the flash.ocx object in a Windows Python 
application,
I've successfully integrated a flash object with the ocx already installed 
on the system using the Activex Wrapper,
but i would like to embbed it inside my application in order to distribute 
my application without the need for the user to install the flash player.
It would like also to embbed the flash animation inside my application 
without loading it .. i mean directly from the memory.

I've seen that it was possible in C++ or in Delphi, using the 
http://www.flashplayercontrol.com/ .. but don't know how to make it in 
Python.

Any ideas are welcome

Dan. 




From tjreedy at udel.edu  Fri Apr  1 21:03:59 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 21:03:59 -0500
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi>
	<kLg3e.203$7b.56@trndny02><424dc33c.55623752@news.oz.net>
	<esk3e.1612$4b.185@trndny09><424dda51.61532058@news.oz.net>
	<rul3e.4647$db.487@trndny07>
Message-ID: <d2kufn$3dr$1@sea.gmane.org>


"Raymond Hettinger" <vze4rx4y at verizon.net> wrote in message 
news:rul3e.4647$db.487 at trndny07...
> More important than the percentage is the clarity of the resulting code 
> and the
> avoidance of continous reinvention of workarounds.
>
> Separating tool features into a basic and an advanced version is common 
> solution
> to managing option/customization complexity.

A super bells & whistles dict would certainly pre-answer a lot of queries 
and save much newsgroup/list response time.

tjr





From mahs at telcopartners.com  Tue Apr 26 13:26:51 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 26 Apr 2005 10:26:51 -0700
Subject: Pythonic way to do static local variables?
In-Reply-To: <d4lskp$veq$1@sea.gmane.org>
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net><mailman.2498.1114482620.1799.python-list@python.org>	<7Ujbe.647694$w62.444038@bgtnsc05-news.ops.worldnet.att.net>
	<d4lskp$veq$1@sea.gmane.org>
Message-ID: <d4ltac$2oo$1@sea.gmane.org>

Terry Reedy wrote:
> "Charles Krug" <cdkrug at worldnet.att.net> wrote in message 
> news:7Ujbe.647694$w62.444038 at bgtnsc05-news.ops.worldnet.att.net...
> 
>>Both of these techniques look promising here.
> 
> 
> Here a third, the closure approach (obviously not directly tested):
> 
> 
> 
Just for grins, here's a fourth approach, using the descriptor protocol

  >>> def func_with_state(state,a):
  ...     state.append(a)
  ...     return state
  ...
  >>> f = func_with_state.__get__([])
  >>> f(1)
  [1]
  >>> f(2)
  [1, 2]
  >>> f(3)
  [1, 2, 3]
  >>>

Michael



From tuure at laurinolli.net  Thu Apr 14 12:55:01 2005
From: tuure at laurinolli.net (Tuure Laurinolli)
Date: Thu, 14 Apr 2005 19:55:01 +0300
Subject: New-style classes, iter and PySequence_Check
Message-ID: <d3m795$cuq$1@epityr.hut.fi>

Someone pasted the original version of the following code snippet on 
#python today. I started investigating why the new-style class didn't 
work as expected, and found that at least some instances of new-style 
classes apparently don't return true for PyInstance_Check, which causes 
a problem in PySequence_Check, since it will only do an attribute lookup 
  for instances.

Things probably shouldn't be this way. Should I go to python-dev with this?

Demonstration snippet:

args={'a':0}

class Args(object):
     def __getattr__(self,attr):
         print "__getattr__:", attr
         return getattr(args,attr)

class ClassicArgs:
     def __getattr__(self, attr):
         print "__getattr__:", attr
         return getattr(args, attr)

if __name__ == '__main__':
     c = ClassicArgs()
     i = c.__iter__()
     print i
     i = iter(c)
     print i

     a = Args()
     i = a.__iter__()
     print i
     i = iter(a)
     print i


From james at wrong.nu  Sun Apr 24 10:51:08 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Sun, 24 Apr 2005 15:51:08 +0100
Subject: Variables
In-Reply-To: <426B0283.40602@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com>
Message-ID: <200504241551.21884.james@wrong.nu>

On Sunday 24 April 2005 03:20, Richard Blackwood wrote:
> To All:
>
>     Folks, I need your help. I have a friend who claims that if I write:
>
> foo = 5
>
> then foo is NOT a variable, necessarily. 

  This is a really amusingly recursive discussion. Your friend has a piece of 
knowledge, "what a variable is and is not". He uses the word "variable" to 
refer to this piece of knowledge. Now, if in some parallel universe people 
used the word "hairbrush" to refer to this bit of knowledge, that wouldn't 
stop his argument having validity if he travelled to that universe - if it 
would then it's already invalidated, as there are more people in *this* 
universe who use the word variable to refer to foo than there are who insist 
that it's not correct, by a significant proportion. So by corollary your 
friend has already argued that one can use many different words to correctly 
refer to the same concept.

  I think your friend would also find it hard to disagree that a single word 
can have multiple meanings, like the example given of "Domain" in maths. I 
think he would have a similarly tough time saying that these words with 
multiple meanings were only allowable in maths, not in english or the 
offshoots of maths like programming. So there's no reason why the concept of 
what you call a variable and what he calls a variable shouldn't be different.

  In summary, the words he uses to describe variables are constants, but point 
at variables, which are different than the constants you use to describe 
variables, which point at variables, and vary from the variables that his 
variables point at.

  And if that last sentence doesn't convince him of the futility of trying to 
use natual language to communicate precise concepts, nothing will.


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From monografia at xfdgr.com  Mon Apr 25 23:02:30 2005
From: monografia at xfdgr.com (monografia )
Date: Tue, 26 Apr 2005 04:02:30 +0100
Subject: 7474 monografia =?iso-8859-1?q?administra=E7=E3o?= - monografia
 direito 7474
Message-ID: <DDAC168FB5C09749AD96D27804CA35D105ACDC6E@SETUBAL>

  Monografias completas a partir de 250,00 !


  monografia administra??o direito turismo economia letras pedagogia
  monografias teses  tese.

Sua monografia a partir de 250,00
http://monografiadireta.rg3.net






From fdreger at amiga.pl  Sat Apr 23 17:47:22 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Sat, 23 Apr 2005 23:47:22 +0200
Subject: func_code vs. string problem
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
	<04mdnXLeedaPLvffRVn-vQ@comcast.com>
Message-ID: <d4eg15$rm8$1@nemesis.news.tpi.pl>

Uzytkownik "Steven Bethard" <steven.bethard at gmail.com> napisal w 
wiadomosci news:04mdnXLeedaPLvffRVn-vQ at comcast.com...

> See the documentation:
>
> http://docs.python.org/ref/dynamic-features.html
>
> """The eval(), execfile(), and input() functions and the exec 
> statement do not have access to the full environment for resolving 
> names. Names may be resolved in the local and global namespaces of 
> the caller. Free variables are not resolved in the nearest enclosing 
> namespace, but in the global namespace."""

Thank you! I feel silly I have not found the piece of instruction 
myself. And even worse, as I still do not understand: if exec() 
resolves free bariable names in the global namespace, how come it 
works well with code in a string? Or with a code in a compiled string?

> Note the last sentence, which tells you that your free variable, 
> 'abc', will be resolved in the *global* namespace.  In your 
> particular problem, you can solve this by substituting your local 
> namespace for the global namespace.

This particular problem - sadly - is a simplified version of the real 
one. I need access to both: global and local namespaces, so this 
solution is not for me.
The manual says I can pass two dictionaries to exec, one for global 
namespace and one for local. But, strange as it seems, I could not get 
it to work. In the example I gave, changing exec f.func_code to exec 
f.func_code in globals(),locals() does not help a bit.

> One possible workaround might be:
>
> py> class foo:
> ...     def test(self):
> ...         print "ABC"
> ...     def checkfunction(self):
> ...         abc=10
> ...         l = locals()
> ...         l.update(globals())
> ...         exec myfunction.func_code in l
> ...     def checkstring(self):
> ...         abc=10
> ...         exec "print abc;self.test()"
> ...
> py> foo().checkfunction()
> __main__.foo
> 10
> ABC

I thought about that... I don't know why, but it seems wrong. Maybe 
the updating dictionaries is not very expensive, but there must be 
some better way. This code has a 'workaround - fixme' written all over 
it.
Up to now, each time I encountered such a workaroundish solution, it 
turned out Python has a cleaner way to do it. I sure hope this is also 
the case here :-).

> But I'd have to know what your real use case is to tell you whether 
> or not this is worth the trouble.  Why do you want to exec the 
> func_code anyway?  Why can't you just call the function?

I put the description in the other post. Perhaps it's jkust my design 
that's broken.
Thanks again.

regards,
Filip Dreger




From gandalf at geochemsource.com  Wed Apr 20 11:47:49 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Wed, 20 Apr 2005 17:47:49 +0200
Subject: Faster os.walk()
In-Reply-To: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
Message-ID: <426679A5.8090504@geochemsource.com>

fuzzylollipop wrote:

>I am trying to get the number of bytes used by files in a directory.
>I am using a large directory ( lots of stuff checked out of multiple
>large cvs repositories ) and there is lots of wasted time doing
>multiple os.stat() on dirs and files from different methods.
>  
>
Do you need a precise value, or are you satisfied with approximations too?
Under which operating system? The 'du' command can be your firend.

man du

Best,

   Laci 2.0



-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From a.schmolck at gmx.net  Tue Apr 19 16:42:18 2005
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: Tue, 19 Apr 2005 21:42:18 +0100
Subject: Array of Chars to String
References: <mailman.2133.1113942800.1799.python-list@python.org>
Message-ID: <yfsis2i7b2t.fsf@black4.ex.ac.uk>

James Stroud <jstroud at mbi.ucla.edu> writes:

> But this seems ugly. I especially don't like "newstr += lttr" because it makes 
> a new string every time. I am thinking that something like this has to be a 
> function somewhere already or that I can make it more efficient using a 
> built-in tool.

"".join

'as


From max2 at fisso.casa  Wed Apr 13 13:37:48 2005
From: max2 at fisso.casa (max(01)*)
Date: Wed, 13 Apr 2005 17:37:48 GMT
Subject: domain specific UI languages
Message-ID: <MNc7e.1229125$35.44994692@news4.tin.it>

hi.

in a previous thread, mr lundh talks about the possibility to create 
"domain specific UI languages" using tkinter.

can he (or anyone else who pleases) explain what they are? give some 
examples (simple is better)?

bye

macs


From dave at pythonapocrypha.com  Tue Apr 12 12:39:06 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Tue, 12 Apr 2005 10:39:06 -0600
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <d3gptd$jni$1@sea.gmane.org>
References: <425a9869$0$38039$bed64819@news.gradwell.net><is2tmhzk.fsf@python.net><425aa0fb$0$38041$bed64819@news.gradwell.net><425AF2AB.1030401@v.loewis.de>	<425b8948$0$38045$bed64819@news.gradwell.net>
	<d3gptd$jni$1@sea.gmane.org>
Message-ID: <425BF9AA.2040800@pythonapocrypha.com>

Terry Reedy wrote:
> I guess I don't understand some people's determination to not have users 
> install fully useable Python on their Windows machines.
[snip]
> To put it another way, needing a Python interpreter to run .py files is no 
> different from, for instance, needing a movie player to run .mpg files, and 
> all Windows users are or need to become familiar with that general concept.
> 
> Also, I think it a bit 'anti-social' to hide usage of Python.  If all 
> Python Windows programs ran with a normal, communally installed Python, 
> then users would gradually get the idea that having Python installed is 
> much like having Shockwave and other utility platforms installed, and that 
> is is part of a 'fully loaded' Windows system to have a .py player 
> installed.
> 
> If there is something about the default install of Python on Windows that 
> makes it less desireable or less easy than other platforms, then maybe that 
> can be fixed.  To make installation easier, maybe someone could write a 
> small .exe that could be frozen with scripts or run with installers and 
> that would detect the presence/absence of the needed Python version and 
> offer an auto download and install if needed.

I mostly agree with the sentiment, but it does break down a little in practice. 
At least currently it does - like you said, this is fixable, but nobody has 
signed up to fix it yet.

The main thing that's needed is a zero-input Python distribution - a Python 
runtime, if you will - that (1) gets installed to a "good" place (2) does so 
without asking the user to do anything, (3) can coexist with different versions 
of the runtime, and (4) is easily detectable by applications wanting to use it.

One other minor component is a small launcher executable, because on Windows 
it's non-trivial to find out which "python.exe" in the task manager is running 
which Python script. Anyway, each app would have a small launcher that 
bootstraps the actual Python script[1]. (Or, if there's some way to trick the 
task manager into displaying something besides "python.exe", that'd work too)

In order to "fit" into the expectations of a typical Windows user, an 
application installer needs the ability to check for the presence of a 
particular version of the Python runtime, and then install it if it's not 
present, and do so without asking the user to do anything.

With that much in place, a lot of the need for freezing Python apps goes away 
(definitely not all of it, but a lot of it). Here's stuff that still needs to be 
considered though:

1) A way for apps to specify their compatibility with different versions of the 
runtime - "I work with pyrt2.3.3 through 2.4.1"

2) A way for apps to register their dependency on that runtime, so that if the 
user uninstalls it, there is at least an indication of what programs might break.

3) (this is a nice-to-have, but not 100% required) A way to download additional 
libraries once and use them for multiple programs, e.g. the installer could see 
if ctypes is present, and if not, go get it. Later programs would take advantage 
of it already being installed. Like I said, not a 100% requirement, and some of 
the ongoing work with code CPAN-like code repositories would shoehorn into this.

4) The security implications, e.g. an innocent app installs pywin32 and enables 
Python client-side scripting in Internet Explorer, and later this is used as a 
big door for malicious users to use.

Most of these tasks don't require a lot of work; indeed this has been on my "one 
of these days" lists for awhile. The main reasons it hasn't been done yet:

1) The code freezing tools like py2exe are *very* good and convenient 
(especially since loading code from zip archives was added - even if you include 
all of Python, it's only a few files on disk, and now they're all in the same 
directory)

2) Storage space and download speeds continue to increase at a rate much faster 
than the rate at which the size of Python is growing - a download of a few MB 
isn't too bad these days, who cares if your app takes 4MB on disk, and so what 
if it doesn't fit on a floppy, for example.

3) As soon as you get started on such a project, almost immediately you will be 
overwhelmed with a desire to create a CPAN-like system while you're at it, at 
which point your project's status will shift from "making good progress!" to "in 
quagmire, developers MIA". :)

-Dave

[1] I built a hacky one of these launcher exe's for one project, and it was 
fairly reusable for apps in the same vein. Basically, the exe would would look 
to see what its name was, and then load a Python module of the same name. So if 
you have MyGame.py, you'd just take the generic launcher.exe, copy it to the 
same directory as your .py files, and rename it to MyGame.exe. On launch, it'd 
load the interpreter, load MyGame.py, and pass it the command-line args.


From jepler at unpythonic.net  Tue Apr 19 22:43:50 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 19 Apr 2005 21:43:50 -0500
Subject: Writing to stdout and a log file
In-Reply-To: <1113958286.367038.182330@z14g2000cwz.googlegroups.com>
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
	<mailman.2142.1113957130.1799.python-list@python.org>
	<1113958286.367038.182330@z14g2000cwz.googlegroups.com>
Message-ID: <20050420024350.GC26325@unpythonic.net>

In that case, it looks like you won't be able to get what you want
without modifying CPython.  PRINT_ITEM calls PyFile_SoftSpace,
PyFile_WriteString, and PyFile_WriteObject, which all use
PyFile_Check().  It might be as simple as changing these to
PyFile_CheckExact() calls in PyFile_WriteString / PyFile_WriteObject,
but I have no idea whether the test suite still works after this change
is made.  It does make this program work (it prints things from X.write):

class X(file):
    def write(self, s):
        print "X.write", `s`
        return file.write(self, s)

import sys
x = X("/tmp/out.txt", "w")
print >>x, 42

I don't care to be the champion of this patch, or to submit it to
sourceforge; I suspect there should be a better review of PyFile_Check
vs PyFile_CheckExact uses in fileobject.c, instead of just picking the
few spots that make this usage work.  Before being submitted as a patch,
a testcase should be added too.  Feel free to run with this if you feel
strongly about it.

Jeff

Index: Objects/fileobject.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Objects/fileobject.c,v
retrieving revision 2.193
diff -u -u -r2.193 fileobject.c
--- Objects/fileobject.c	7 Nov 2004 14:15:28 -0000	2.193
+++ Objects/fileobject.c	20 Apr 2005 02:41:32 -0000
@@ -2012,7 +2012,7 @@
 		PyErr_SetString(PyExc_TypeError, "writeobject with NULL file");
 		return -1;
 	}
-	else if (PyFile_Check(f)) {
+	else if (PyFile_CheckExact(f)) {
 		FILE *fp = PyFile_AsFile(f);
 #ifdef Py_USING_UNICODE
 		PyObject *enc = ((PyFileObject*)f)->f_encoding;
@@ -2082,7 +2082,7 @@
 					"null file for PyFile_WriteString");
 		return -1;
 	}
-	else if (PyFile_Check(f)) {
+	else if (PyFile_CheckExact(f)) {
 		FILE *fp = PyFile_AsFile(f);
 		if (fp == NULL) {
 			err_closed();

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From python.tr at gmail.com  Fri Apr  8 16:13:08 2005
From: python.tr at gmail.com (Hasan D)
Date: Fri, 8 Apr 2005 23:13:08 +0300
Subject: Https Form Page
Message-ID: <764176c10504081313501b1e1f@mail.gmail.com>

I'm new on this httplib and urllib. Actually I dont know what should i use.

I want to fill the form in a "https" page , and return the result . I
write a test code but always gives errors. I cant find any good
example about this on the net. What should I do about this ?


import urlparse,urllib,httplib,string,htmllib,formatter

#port="443"
target="https://www.abc.com/"
params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
http=httplib.HTTP("https://www.abc.com/",443)

data='Name=x&Adress=x'
headers = {"Content-type":
"application/x-www-form-urlencoded","Accept": "text/plain"}

print "Sending Data On "+target+"...\n" 
http.putrequest("POST",target+"/xxx.asp?q=7&b=11",params)

response = http.getresponse()
print response.status, response.reason            

http.send(data)

code,msg,headers = http.getreply()

print "HTTP Code : ",str(code)
print "HTTP Connection : ",msg
print "HTTP headers : \n",headers,"\n"

HTML=http.getfile().read()
MyParser=htmllib.HTMLParser(formatter.NullFormatter())
MyParser.feed(HTML)
# Print all the anchors from the results page
print MyParser.anchorlist


From tjreedy at udel.edu  Wed Apr 27 02:39:47 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 27 Apr 2005 02:39:47 -0400
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com><d4kh4q$tqf$1@domitilla.aioe.org>	<86wtqqm27r.fsf@guru.mired.org><d4ktck$r9a$1@domitilla.aioe.org>	<86is29n9cg.fsf@guru.mired.org><d4l825$mj7$1@domitilla.aioe.org><mailman.2525.1114534435.1799.python-list@python.org>	<d4md4t$gfm$1@domitilla.aioe.org><mailman.2548.1114556884.1799.python-list@python.org>
	<d4mrdf$jrc$1@domitilla.aioe.org>
Message-ID: <d4nbph$h7o$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:d4mrdf$jrc$1 at domitilla.aioe.org...
> From a technical perspective, I can accept that .pyc files are private 
> and temporary. To a certain extend, it does helps development cycle. 
> Every time I amend my source codes, I just run it without having to 
> consider or needing to re-compile the source files.

>From a user perspective, source code is the run-time program.

> The idea of having to release the program or library as source files does 
> ring alarms in many executives in corporate world.

I understand that people use Python while resisting its purpose and design. 
But I also understand that it is *their* responsibilty to hide their code, 
which may possibly mean not using Python, or which may mean developing 
proprietary methods to translate to something designed to *not* be 
readable.  For all we know, some of the developers have been paid to do 
exactly that -- and not talk about it.

Python is *designed* for human readability.  That is one of its big 
features!  The same also seems somewhat true for CPython's bytecodes, 
especially when disassembled with the dis module that comes with the 
interpreter.  You even get all the object names included in the code 
object.

Terry J. Reedy







From david at handysoftware.com  Mon Apr  4 23:34:41 2005
From: david at handysoftware.com (David Handy)
Date: Mon, 4 Apr 2005 23:34:41 -0400
Subject: Unexpected result when comparing method with variable
Message-ID: <20050405033441.GA15819@arno2>

I had a program fail on me today because the following didn't work as I
expected:

>>> class C:
...     def f(self):
...         pass
...
>>> c = C()
>>> m = c.f
>>> m is c.f
False

I would have expected that if I set a variable equal to a bound method, that
variable, for all intents and purposes, *is* that bound method, especially
since I hadn't changed or deleted anything on the class or its instance.

The same thing happens when attempting to compare an unbound method with a
variable name bound to that unbound method:

>>> M = C.f
>>> M is C.f
False

If I were to guess what is going on here, I would say that the expression
c.f invokes a descriptor that manufactures a brand new "method object" each
time.  The problem is, this is non-intuitive (to me) and prevented me from
doing something I thought was useful.

My use case is deferring operations till later, by placing tuples of a
method and its arguments in a list to be processed at some future time, but
doing some special-case processing only for certain methods:

deferred = []
...
deferred.append((c.f, ('abc', 123)))

...

for method, params in deferred:
    method(*params)
    if method is c.f:
        # handle a special case

But I can't do that special-case handling this way, I have to resort to some
other means to identify a method, "method is c.f" is always False. Which
seems strange to me.

This behavior is in Python 2.4, 2.3, and 2.2.

The workaround really awkward:

SPECIAL_METHOD = c.f
...
deferred.append((SPECIAL_METHOD, ('abc', 123)))
...
if method is SPECIAL_METHOD:
    # handle special case

If I forget at any time to use the name SPECIAL_METHOD, but resort to it's
"real" name of c.f, then the comparison fails.

So, is this a bug or expected?

If I complain about this, would I get any sympathy? ;)

regards,
David H.



From bokr at oz.net  Tue Apr 12 09:26:52 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 12 Apr 2005 13:26:52 GMT
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de><ec6dnbne_Lf_zcbfRVn-tA@comcast.com><1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<425bac0d.185429854@news.oz.net>
	<mailman.1748.1113305360.1799.python-list@python.org>
Message-ID: <425bbc80.189640348@news.oz.net>

On Tue, 12 Apr 2005 13:26:54 +0200, "Fredrik Lundh" <fredrik at pythonware.com> wrote:

>Bengt Richter wrote:
>
>> But isn't bool supposed to be a singleton class/type ?
>>
>> >>> [bool(x) for x in 0, 0.0, [], {}, False]
>> [False, False, False, False, False]
>> >>> [id(bool(x)) for x in 0, 0.0, [], {}, False]
>> [505014288, 505014288, 505014288, 505014288, 505014288]
>
>"False" is an ordinary global object, not an object factory or a singleton class.
>
UIAM, "False" is a string, or a representation of a string ;-)
And the name False is typically found as  __builtins__.False  unless you
have shadowed it locally or in some module globals, as I'm sure you know.

I was just demonstrating that all the bool(x) _instances_ are the identical
False object in the above, and duck-wise that quacks singleton-like,
even though the True maybe makes it a dualton, since bool does return two distinct instances ;-)

IMO the global False name accessibility is a red herring, since it's the object it is
normally bound to that is the real subject.

 >>> __builtins__.False is bool(0)
 True

UIAM, the True and False objects per se are unique and built into boolobject.c
And you can bind all the names you like to them, but bool(0) is always that single
unique object and so is bool(1) its unique object. I don't believe this is an
optimization like that involving the first 100 integer values or so.

It's a weird beast, being a subtype of int also. I'll defer to the BDFL in
http://www.python.org/peps/pep-0285.html

"""
    The values False and True will be singletons, like None.  Because
    the type has two values, perhaps these should be called
    "doubletons"?  The real implementation will not allow other
    instances of bool to be created.
"""

Regards,
Bengt Richter


From tjreedy at udel.edu  Fri Apr  8 17:07:23 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 8 Apr 2005 17:07:23 -0400
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>	<mailman.1544.1112978919.1799.python-list@python.org>	<d36fp0$suk$1@vegh.ks.cc.utah.edu><mailman.1555.1112983423.1799.python-list@python.org>
	<d36hv6$51$1@vegh.ks.cc.utah.edu>
Message-ID: <d36rlk$7n9$1@sea.gmane.org>


> Further, is there much processing required to do the magic? When python
> do introspective magic, is it memory intensive? by that I mean does it
> have to make copies of the objects to do the look-ups?

A Python interpreter never copies *objects* (as opposed to references to 
objects) except when you ask it too.  (This sometimes trips up newbies when 
the copied reference is to an uncopied mutable object that they thought was 
copied.)  For CPython, references are 4 (possibly 8) byte pointers, which 
is smaller than any object.

Terry J. Reedy





From eric_brunel at despammed.com  Wed Apr 27 05:31:35 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 27 Apr 2005 11:31:35 +0200
Subject: tkinter text width
References: <mailman.2550.1114560111.1799.python-list@python.org>
Message-ID: <opspvwqxd4rqur0o@eb.pragmadev>

On Tue, 26 Apr 2005 17:01:46 -0700, James Stroud <jstroud at mbi.ucla.edu> wrote:

> Hello All,
>
> I would like for a tkinter text widget to be aware of how big the frame that
> contains it is, then I would like for it to reset its width to the
> appropriate number of characters when this frame changes size.

Errr... This is supposed to be the regular behaviour. How do you create your Text widget? Do you specify a width and height? If you do not, the default width and height are 80 and 24 respectively, and the widget won't resize to less than that. If you want a Text widget to be the smallest as possible in its container, you can do something like:

-----------------------------------------------------
 from Tkinter import *

root = Tk()

t = Text(root, width=1, height=1)
t.pack(fill=BOTH, expand=1)

root.geometry('500x200')

root.mainloop()
-----------------------------------------------------

The "trick" is to create the Text as small as possible (width=1, height=1), make it fill its whole container (pack(fill=BOTH, expand=1)), then set the dimensions for the container window (geometry('500x200')). You'll get a Text that will shrink and expand as much as you like.

Is it what you were after?

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17;8(%,5.Z65\\'*9--56l7+-'])"


From tim.leeuwvander at nl.unisys.com  Mon Apr 18 14:03:07 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 18 Apr 2005 11:03:07 -0700
Subject: Behaviour of str.split
In-Reply-To: <1113838796.626344.309630@l41g2000cwc.googlegroups.com>
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
	<1113838796.626344.309630@l41g2000cwc.googlegroups.com>
Message-ID: <1113847387.862751.61780@f14g2000cwb.googlegroups.com>


runes wrote:
> The behaviour of "".split("*") is not that strange as the splitpoint
> always disappear. The re.split() have a nice option to keep the
> splitpoint which the str.split should have, I think.
>
> One expectation I keep fighting within myself is that I expect
>
> "mystring".split('') to return  ['m', 'y', 's', 't', 'r', 'i', 'n',
> 'g']. But I guess it's in line with "There should be one-- and
> preferably only one --obvious way to do it." that it's not so.

Fortunately, this is easy to write as: list("mystring").
Actually for me it's not so counter-intuitive that "mystring".split('')
doesn't work; what are you trying to split on?

Anyways, I usually need to split on something more complicated so I
split with regexes, usually.

cheers,

--Tim



From onurb at xiludom.gro  Fri Apr 15 09:46:39 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 15 Apr 2005 15:46:39 +0200
Subject: Python - interpreted vs compiled
In-Reply-To: <1113566234.343746.48460@o13g2000cwo.googlegroups.com>
References: <1113566234.343746.48460@o13g2000cwo.googlegroups.com>
Message-ID: <425fc5c0$0$1259$636a15ce@news.free.fr>

codecraig wrote:
> Hi,
>   I have a question about Python.  I know that it is an interpreted
> language,

Nope. A *language* is neither compiled nor interpreted. An 
*implementation* of a language can use strict interpretation, byte-code 
compilation + VM, or native code compilation (it could as well use 
purely mechanical stuff or whatever).

CPython - the current reference implementation of Python - uses 
byte-code compilation + VM. Jython too, but is relies on the Java 
byte-code and VM. IronPython targets MS .NET CLR.

> meaning a python program is converted to binary on the fly
> each time it is run, or compiled.

Only the main script is recompiled each time - unless you compile it by 
yourself. Imported code is (re)compiled only if necessary.

>   What would be the purpose of compiling?  

Having an intermediate representation that is faster to execute for the 
VM. What is the purpose of compiling, be it to byte-code or to native 
object code ?

> I guess the compiled python
> code (question, is compiled python code called byte code?

yes.

> is not readable since it is not plain text, 

You mean human-readable ? Depends on which human reads it !-)
(NB : No, I can't read byte-code)

> which may be
> a reason for compiling...

No, this is an effect, not a cause.

Reverse-engineering Python byte-code is quite easy (idem for Java). This 
is not meant to "protect" code. Neither is native object-code 
compilation a protection against craking - or we wouldn't see so many 
cracked applications on Windows machines...

> but why else??

Execution speed. A byte-code is kind of an assembly language for a 
non-existing processor (hence the 'virtual machine' concept). This is 
exactly the same motivation as for native-code compilation : not having 
to tokenise/parse/translate the code each time it's runned.

The main difference here between Python and Java is that the Python 
runtime takes care of those details for you instead of requiring you to 
either manually recompile everything each time you make a change or use 
a complex build system (that you'll have to - manually - maintain anyway).

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


From unknownsoldier93 at yahoo.com  Tue Apr  5 22:53:57 2005
From: unknownsoldier93 at yahoo.com (gf gf)
Date: Tue, 5 Apr 2005 19:53:57 -0700 (PDT)
Subject: Calling a Perl Module from Python
Message-ID: <20050406025357.85585.qmail@web20708.mail.yahoo.com>

I've recently made the switch.  Wow, is Python great! 
One thing which I haven't been able to do is replace
Perl's great lib collection (HTML::Parser, for
instance, can do a lot that Soup just can't).

Is there anyway to call Perl modules from Python?

Thanks

PS Please cc me on all responses


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - Find what you need with new enhanced search. 
http://info.mail.yahoo.com/mail_250


From gsakkis at rutgers.edu  Sun Apr  3 14:17:35 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 3 Apr 2005 11:17:35 -0700
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<1112466233.403989.125810@l41g2000cwc.googlegroups.com>
	<b8lu411dfphm8lbc6tc5anpq9m2tn3qlef@4ax.com>
	<1112516432.638697.193840@o13g2000cwo.googlegroups.com>
	<2erv41d8ilujl0vmformr26vm0tvhf689o@4ax.com>
Message-ID: <1112552255.356217.81640@f14g2000cwb.googlegroups.com>

>def define(func):
>    if not ENABLE_TYPECHECKING:
>        return lambda func: func
>    # else decorate func

A small correction: The argument of the decorator is not 'func' but the
parameter checks you want to enforce. A template for define would be:

def define(inputTypes, outputType):
    if not ENABLE_TYPECHECKING:
        return lambda func: func
    def decorate(func):
        def typecheckedFunc(*args,**kwds):
            ##### TYPECHECK *args, **kwds HERE #####
            r = func(*args,**kwds)
            ##### TYPECHECK r HERE #####
            return r
        return typecheckedFunc
    return decorate


Depending on how much flexibility you allow in inputTypes, filling in
the typechecking logic can be from easy to challenging. For example,
does typechecking have to be applied in all arguments or you allow
non-typechecked aruments ? Can it handle *varargs and **kwdargs in the
original function ? An orthogonal extension is to support 'templated
types' (ala C++), so that you can check if something is 'a dict with
string keys and lists of integers for values'. I would post my module
here or the cookbook but at 560 (commented) lines it's a bit long to
qualify for a recipe :-)

George



From claird at lairds.us  Mon Apr 25 13:08:04 2005
From: claird at lairds.us (Cameron Laird)
Date: Mon, 25 Apr 2005 17:08:04 GMT
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org>
Message-ID: <hpivj2-lh1.ln1@lairds.us>

In article <868y37osc7.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
			.
			.
			.
>Anyway, checking the system name is the wrong way to build portable
>programs. For one thing, as you've discovered, new systems won't work
>properly. For another, upgrades to existing systems may break things
>as well.
>
>What you should do instead is check on how to use the features you
>want. If you watch a typical autoconf script, you'll see it groveling
>through libraries, include files, and various directories looking for
>subroutines, defines and commands. That's the idea, but without
>knowing which features you're looking for, I can't say how you would
>check for them.
>
>This takes more time to write, but results in more robust code. For
>instance, if some distribution changes one of the features to mimic a
>"better" distribution that you already support, instead of your script
>breaking, it'll just work. This is much better than having to teach
>your script how to distinguish between versions of distributions.
			.
			.
			.
Not for me.

Well, not absolutely.  I have a load of respect for you, Mike, and there 
certainly are amazing edifices built on autoconf.  Also, I think it's an
important part of our engineering to understand the principle of groveling
around interrogating capabilities; among other things, it's good practice
for duck typing and idiomatic Python exception style.  I'm very
uncomfortable, though, with an assertion that reliance on a fixed table of 
attributes is always wrong.  

Briefly, use of autoconf is FAR from a guarantee that everything works
right when starting with a new flavor.


From tiissa at nonfree.fr  Wed Apr 20 16:08:39 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 22:08:39 +0200
Subject: What's the difference between these 2 statements?
In-Reply-To: <1114026007.999930.12850@f14g2000cwb.googlegroups.com>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
	<1114026007.999930.12850@f14g2000cwb.googlegroups.com>
Message-ID: <4266b6c6$0$8860$636a15ce@news.free.fr>

ahmedt at gmail.com wrote:
> I'm sorry, I'm not really following your logic. Can you supply the
> statement with the three parameters ?
> 
> so if I want to reverse it fully using s[len(s)-1:x:-1] what would x be
> or is it impossible to express it in this way ?

Contrary to what I said above x should be _strictly_ less than -len(s).
You stop when you reach in the list the given end index (and don't take 
the item there) or if you leave the index range.

But -1 as an index is the same as (len(s)-1).
Therefore going from len(s)-1 down to -1 is the same as going from 
len(s)-1 to len(s)-1 hence an empty list.

And -len(s) is the same as 0 (my mistake above)
But -len(s)-1 is not in the list thus you won't discard any limit.

The example:
In [1]: s='12345'

In [2]: s[len(s)-1:0:-1]
Out[2]: '5432'

In [3]: s[len(s)-1:-1:-1]
Out[3]: ''

In [4]: s[-1],s[len(s)-1]
Out[4]: ('5', '5')

In [5]: s[len(s)-1:-len(s)-1:-1]
Out[5]: '54321'

In [6]: s[len(s)-1:-len(s):-1]
Out[6]: '5432'


From codecraig at gmail.com  Fri Apr 22 16:28:57 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 13:28:57 -0700
Subject: figuring out # of bytes
Message-ID: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>

i want to the number of bytes in a string...

is, len(x) accurate?

so, x = "hi"
len(x) == 2 ....so that means two bytes?

thanks



From claird at lairds.us  Tue Apr  5 22:08:23 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 06 Apr 2005 02:08:23 GMT
Subject: IronPython 0.7 released!
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
	<mailman.1408.1112743462.1799.python-list@python.org>
Message-ID: <fnqbi2-p9c.ln1@lairds.us>

In article <mailman.1408.1112743462.1799.python-list at python.org>,
Steve Holden  <steve at holdenweb.com> wrote:
			.
			.
			.
>Presumably when we get past the embracing and on to the extending Barry 
>can finally retrain Spambayes to reject penis enlargement emails?
			.
			.
			.
Hey!  I'm indignant; why, if you jokers were earnest about 
demonstrating Python's commercial applicability, you'd apply
Spambayes' algorithms to the dual, and presumably highly 
remunerative, problems of designing spam that readers answer.
This community just isn't *serious* enough.

And now, for something completely different, I'll tender a
personal view:  I think Mr. Gates and Python are actually
destined to get along uncharacteristically well.  Roughly, I
suspect the habits and motivations of the two are so skew,
that the usual "embrace and extend" simply won't obtain.  I
soberly expect IronPython to work out well for both Microsoft
and Python.

That changes nothing about my long-term feelings toward
Microsoft and Python.


From aleksander.helgaker at gmail.com  Wed Apr 20 11:39:41 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 20 Apr 2005 08:39:41 -0700
Subject: random number between 0 and 20
In-Reply-To: <_c-dnaseE4DQ7vvfRVn-3A@powergate.ca>
References: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
	<_c-dnaseE4DQ7vvfRVn-3A@powergate.ca>
Message-ID: <1114011580.964880.58280@l41g2000cwc.googlegroups.com>

Yes I know about assigning and all that. I just stated the name of the
variable so that people could easily explain how to create the random
number. I needed it to practice Python. I just finished making a number
guess program. I just finished it. It was much easier to do then I
thought it would be.



From larsmtl at yahoo.com  Thu Apr 21 16:29:47 2005
From: larsmtl at yahoo.com (larsmtl at yahoo.com)
Date: 21 Apr 2005 13:29:47 -0700
Subject: Python CGI Select Multiple Returning all items in box
Message-ID: <1114115387.081363.109450@o13g2000cwo.googlegroups.com>

Howdy all,

Is there an easy way to return all items of an "HTML select multiple"
even if they aren't highlighted?

form=cgi.FieldStorage()
form.getlist("box")

only returns those that are selected.

Thanks,

Mark



From fredrik at pythonware.com  Fri Apr 22 13:13:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 19:13:39 +0200
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com><d48ktk$4ov$1@news.vcd.hp.com>
	<RMmdnRLDlZu6fPrfRVn-rQ@telcove.net><mailman.2250.1114119969.1799.python-list@python.org><m3sm1jbfek.fsf@iny.iki.fi>
	<du7sm1j6uzc.fsf@mozart.cc.tut.fi><m3u0lzm5q1.fsf@iny.iki.fi><roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
Message-ID: <d4bb3f$46b$1@sea.gmane.org>

Ilpo Nyyss?nen wrote:

> > Are you speculating that it might be a problem, or saying that you have
> > seen it be a problem in a real-life program?
>
> Well, it depends, I might say yes. I have a calendar app with command
> line user interface. There the use is like this: "view, add, view,
> edit, view, ..." and those are separate command invocations. In that
> case a second in startup speed can be a long time. And I did use the
> profiler and it did show the sre compiling to be the slowest thing.

so you picked the wrong file format for the task, and the slowest tool you
could find for that file format, and instead of fixing that, you decided that the
regular expression engine was to blame for the bad performance.  hmm.

> Nowdays I use libxml2-python as the XML parser and so the problem is
> not so acute anymore. (That is just harder to get in running for
> python compiled from source outside the rpm system and it is not so
> easy to use via DOM interface.)

python has shipped with a fast XML parser since 2.1, or so.

</F> 




From __peter__ at web.de  Fri Apr 15 11:35:38 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 15 Apr 2005 17:35:38 +0200
Subject: eval function not working how i want it dag namn
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
	<d3olf8$7s7$1@gemini.csx.cam.ac.uk>
Message-ID: <d3on01$cq8$02$2@news.t-online.com>

Michael Hoffman wrote:

>> def list_members(obj)
>>l?=?dir(obj)
>>return?map(lambda?x?:?eval('obj.'+x),?l)
> 
> That works fine for me with Python 2.4.

Python 2.4 (#6, Jan 30 2005, 11:14:08)
[GCC 3.3.3 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> def lm(obj):
...     l = dir(obj)
...     return map(lambda x: eval("obj." + x), l)
...
>>> class X:
...     pass
...
>>> x = X()
>>> x.question = "Are you sure?"
>>> lm(x)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 3, in lm
  File "<stdin>", line 3, in <lambda>
  File "<string>", line 0, in ?
NameError: name 'obj' is not defined
>>>

Peter



From bvande at po-box.mcgill.ca  Thu Apr 21 20:58:37 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Thu, 21 Apr 2005 20:58:37 -0400
Subject: Dictionary question.
In-Reply-To: <1114129715.038945.227200@o13g2000cwo.googlegroups.com>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
	<1114129715.038945.227200@o13g2000cwo.googlegroups.com>
Message-ID: <42684C3D.3060705@po-box.mcgill.ca>

hawkesed said unto the world upon 2005-04-21 20:28:
> Actually,
>   I think I got it now. Here is what I did:
> 
>>>>for num in alist:
> 
> ... 	if adict.has_key(num):
> ... 		x = adict.get(num)
> ... 		x = x + 1
> ... 		adict.update({num:x})
> ... 	else:
> ... 		adict.update({num:1})
> ...
> 
>>>>adict
> 
> {128: 2, 129: 2, 132: 1, 153: 1, 30: 1, 53: 1, 57: 1, 61: 1, 66: 2, 67:
> 1, 69: 2, 71: 1, 72: 1, 73: 2, 74: 1, 75: 2, 76: 2, 77: 2, 78: 2, 82:
> 1, 84: 1, 85: 4, 87: 2, 88: 3, 89: 1, 91: 1, 92: 1, 93: 2, 94: 2, 95:
> 3, 96: 1, 97: 3, 98: 2, 99: 1, 100: 6, 101: 4, 102: 2, 103: 1, 104: 1,
> 105: 1, 106: 2, 107: 2, 108: 2, 109: 2, 111: 3, 112: 1, 114: 3, 115: 3,
> 116: 3, 118: 1, 119: 2, 122: 2, 123: 1, 125: 1, 126: 1}
> Thanks all for the help and best regards!
> Ed
> 


Hi Ed,

I think there is a more Pythonic way. Here's something I used in a 
similar context:

def get_frequency_dict(sequence):
     '''sequence of hashables -> dictionary of frequency of members

     Given a sequence of items, each of which is hashable (i.e. can
     serve as a key in a dictionary), the function returns a
     dictionary, using the items as keys, and the number of their
     occurrences as values.

     Usage:
     >>> get_frequency_dict([1,2,2,3,3,3,4,4,4,4])
     {1: 1, 2: 2, 3: 3, 4: 4}
     >>> get_frequency_dict([[], "will fail as list aren't hashable"])
     ...
     TypeError: list objects are unhashable
     '''
     frequency_dict = {}

     for element in sequence:
         frequency_dict[element] = frequency_dict.setdefault(
                                     element, 0) + 1

     return frequency_dict

HTH,

Brian vdB




From bill.mill at gmail.com  Wed Apr 27 10:17:13 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 27 Apr 2005 10:17:13 -0400
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <797fe3d405042707174a30cd9d@mail.gmail.com>

On 4/27/05, monkey <m at m.com> wrote:
> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
> 
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.
> 

Believe it or not, this has been discussed before :)

Some relevant links, in no particular order:

http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/e58230e15f7bb072/ec34f252a00c4b31?q=boa+wing+komodo&rnum=1#ec34f252a00c4b31
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/4ac901800452fe52/32f9a7f307d16bbd?q=boa+wing+komodo&rnum=3#32f9a7f307d16bbd
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/b4301bf4de581351/84fea0f68251b810?q=ide&rnum=14#84fea0f68251b810
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/6018db6e62e44895/46ef2516271a51d3?tvc=1&q=vim+emacs+komodo#46ef2516271a51d3
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a917d15f5a16500c/d989575525959c32?q=vim+emacs+komodo&rnum=4#d989575525959c32
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e3a65f2908bb8ba4/12ea5915f8f09546?q=vim+emacs+komodo&rnum=5#12ea5915f8f09546
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/8cf3565673bc4a7e/a4a84c1e7271ca1a?tvc=1&q=vim+emacs+komodo#a4a84c1e7271ca1a
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/5de87dcdd817ba26/b2ff72c8e864818b?q=vim+emacs+wing&rnum=1#b2ff72c8e864818b
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/766c24a82674da7/47d9c8157639d81e?q=vim+wing+komodo&rnum=2#47d9c8157639d81e
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/b21e43c45f183dc7/3a118074c68f1f35?q=vim+wing+komodo&rnum=3#3a118074c68f1f35
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/2225676eb7e1b4e/cdee764dfa2b5391?q=best+IDe&rnum=1#cdee764dfa2b5391

Peace
Bill Mill
bill.mill at gmail.com


From bronger at physik.rwth-aachen.de  Wed Apr 20 08:06:46 2005
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 20 Apr 2005 14:06:46 +0200
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
Message-ID: <87vf6hlkix.fsf@wilson.rwth-aachen.de>

Hall?chen!

Maxim Kasimov <kasimov at i.com.ua> writes:

> [...]
>
> WOW, just greate! ... but i'd like to relax at some more
> interesting way than to comment each of rows

Then just use a good editor.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus


From sjmachin at lexicon.net  Sat Apr 30 08:26:43 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 30 Apr 2005 22:26:43 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>
	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>
	<d4vn0s$i3b$1@gemini.csx.cam.ac.uk>
Message-ID: <fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>

On Sat, 30 Apr 2005 11:35:05 +0100, Michael Hoffman
<cam.ac.uk at mh391.invalid> wrote:

>John Machin wrote:

>> Real-world data is not "text".
>
>A lot of real-world data is. For example, almost all of the data I deal with
>is text.

OK, depends on one's definitions of "data" and "text". In the domain
of commercial database applications, there is what's loosely called
"text": entity names, and addresses, and product descriptions, and the
dreaded free-text "note" columns -- all of which (not just the
"notes") one can end up parsing trying to extract extraneous data
that's been dumped in there ... sigh ...

>
>>>That's nice. Well I agree with you, if the OP is concerned about embedded
>>>CRs, LFs and ^Zs in his data (and he is using Windows in the latter case),
>>>then he *definitely* shouldn't use fileinput.
>> 
>> And if the OP is naive enough not to be concerned, then it's OK, is
>> it?
>
>It simply isn't a problem in some real-world problem domains. And if there
>are control characters the OP didn't expect in the input, and csv loads it
>without complaint, I would say that he is likely to have other problems once
>he's processing it.

Presuming for the moment that the reason for csv not complaining is
that the data meets the csv non-spec and that the csv module is
checking that: then at least he's got his data in the structural
format he's expecting; if he doesn't do any/enough validation on the
data, we can't save him from that.

>
>> Except, perhaps, the reason stated in fileinput.py itself: 
>> 
>> """
>> Performance: this module is unfortunately one of the slower ways of
>> processing large numbers of input lines.
>> """
>
>Fair enough, although Python is full of useful things that save the
>programmer's time at the expense of that of the CPU, and this is
>frequently considered a Good Thing.
>
>Let me ask you this, are you simply opposed to something like fileinput
>in principle or is it only because of (1) no binary mode, and (2) poor
>performance? Because those are both things that could be fixed. I think
>fileinput is so useful that I'm willing to spend some time working on it
>when I have some.

I wouldn't use fileinput for a "commercial data processing" exercise,
because it's slow, and (if it involved using the Python csv module) it
opens the files in text mode, and because in such exercises I don't
often need to process multiple files as though they were one file.

When I am interested in multiple files -- more likely a script that
scans source files -- even though I wouldn't care about the speed nor
the binary mode, I usually do something like:

for pattern in args: # args from an optparse parser
    for filename in glob.glob(pattern):
        for line in open(filename):

There is also an "on principle" element to it as well -- with
fileinput one has to use the awkish methods like filelineno() and
nextfile(); strikes me as a tricksy and inverted way of doing things.

Cheers,
John



From sjmachin at lexicon.net  Sat Apr 30 19:16:22 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 01 May 2005 09:16:22 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>	<d4vn0s$i3b$1@gemini.csx.cam.ac.uk>
	<fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>
	<mailman.58.1114867406.14961.python-list@python.org>
Message-ID: <391871t746ng3pgjlm8dv801qjd5cg9qem@4ax.com>

On Sat, 30 Apr 2005 09:23:16 -0400, Steve Holden <steve at holdenweb.com>
wrote:

>John Machin wrote:
>[...]
>> 
>> I wouldn't use fileinput for a "commercial data processing" exercise,
>> because it's slow, and (if it involved using the Python csv module) it
>> opens the files in text mode, and because in such exercises I don't
>> often need to process multiple files as though they were one file.
>> 
>If the process runs once a month, and take ten minutes to process the 
>required data, isn't that fast enough.

Depends: (1) criticality: could it have been made to run in 5 minutes,
avoiding the accountant missing the deadline to EFT the taxes to the
government (or, worse, missing the last train home)?

(2) "Many a mickle makes a muckle": the total of all run times could
be such that overnight processing doesn't complete before the day
shift turns up ...

> It's unwise to act as though 
>"slow" is an absolute term.

>
>> When I am interested in multiple files -- more likely a script that
>> scans source files -- even though I wouldn't care about the speed nor
>> the binary mode, I usually do something like:
>> 
>> for pattern in args: # args from an optparse parser
>>     for filename in glob.glob(pattern):
>>         for line in open(filename):
>> 
>> There is also an "on principle" element to it as well -- with
>> fileinput one has to use the awkish methods like filelineno() and
>> nextfile(); strikes me as a tricksy and inverted way of doing things.
>> 
>But if it happens to be convenient for the task at hand why deny the OP 
>the use of a tool that can solve a problem? We shouldn't be so purist 
>that we create extra (and unnecessary) work :-), and principles should 
>be tempered with pragmatism in the real world.

If the job at hand is simulating awk's file reading habits, yes then
fileinput is convenient. However if the job at hand involves anything
like real-world commercial data processing requirements then fileinput
is NOT convenient.

Example 1: Requirement is, for each input file, to display name of
file, number of records, and some data totals.

Example 2: Requirement is, if end of file occurs when not expected
(including, but not restricted to, the case of zero records) display
an error message and terminate abnormally.

I'd like to see some code for example 1 that used fileinput (on a list
of filenames) and didn't involve "extra (and unnecessary) work"
compared to the "for filename in alist / f = open(filename) / for line
in f" way of doing it.

If fileinput didn't exist, what do you think the reaction would be if
you raised a PEP to include it in the core?



From Scott.Daniels at Acm.Org  Wed Apr 20 13:09:36 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 20 Apr 2005 10:09:36 -0700
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,winzip
 barfs on Python-2.4.1.tar, cannot download bzip2
In-Reply-To: <d45dh8$ppl$1@sparta.btinternet.com>
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2108.1113922028.1799.python-list@python.org>
	<d45dh8$ppl$1@sparta.btinternet.com>
Message-ID: <4266871c$1@nntp0.pdx.net>

Bill Davy wrote:
> Thanks Jaime,
> 
> I'm making gradual progress and am finding it quite satisfying.  Resorted to 
> tracing Python in MSVC6 to see what it was trying to IMPORT, which is a bit 
> heavy but thank heavens for the sources.
You might try running python from a command window and running it "-v" 
as in:

     python -v prog.py -args ...

--Scott David Daniels
Scott.Daniels at Acm.Org


From has.temp2 at virgin.net  Fri Apr 22 19:12:04 2005
From: has.temp2 at virgin.net (has)
Date: 22 Apr 2005 16:12:04 -0700
Subject: Python licence again
In-Reply-To: <87fyxilehj.fsf@pobox.com>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com>
Message-ID: <1114211524.594547.227060@o13g2000cwo.googlegroups.com>

John J. Lee wrote:
> Yes.  ISTR that licence is a British English spelling, though my
> British brain has been thoroughly contaminated by US spellings and
> usage by now.

Oh, it only gets worse: a couple years on the illiterate intarweb and
even basics like "its" and "it's" become a major struggle. ;p

> (Or are they like practice and practise, which (can)
> mean subtly different things in British English

Yep, we aim to confuse:

licence, practice = noun
license, practise = verb

/grammar geek



From maxm at mxm.dk  Wed Apr 20 03:43:36 2005
From: maxm at mxm.dk (Max M)
Date: Wed, 20 Apr 2005 09:43:36 +0200
Subject: To decode the Subject =?iso-8859-2?Q?=... in email in python
In-Reply-To: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>
References: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>
Message-ID: <42660779$0$226$edfadb0f@dread12.news.tele.dk>

Dan Polansky wrote:
> When parsing messages using python's libraries email and mailbox, the
> subject is often encoded using some kind of = notation. Apparently, the
> encoding used in this notation is specified like =?iso-8859-2?Q?=... or
> =?iso-8859-2?B?=. Is there a python library function to decode such a
> subject, returning a unicode string? The use would be like
> 
>   human_readable = cool_library.decode_equals(message['Subject'])


     parts = email.Header.decode_header(header)
     new_header = email.Header.make_header(parts)
     human_readable = unicode(new_header)



-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From igouy at yahoo.com  Fri Apr 15 12:31:36 2005
From: igouy at yahoo.com (igouy at yahoo.com)
Date: 15 Apr 2005 09:31:36 -0700
Subject: Is Python appropriate for web applications?
In-Reply-To: <d3nvlj$oud$1@swifty.westend.com>
References: <op.so85a1bgr3xrds@sony><d3nvlj$oud$1@swifty.westend.com>
Message-ID: <1113582696.738685.84860@l41g2000cwc.googlegroups.com>

> > How about the speed  of execution?
>
> There is no simple answer. Both languages use C functions which are
> executed at CPU speed. But with interpreted code Python seems to be
> approximately 3-4 times faster than PHP
(http://dada.perl.it/shootout/).

The Win32 Computer Language Shootout hasn't been updated for 22 months.

The Great Computer Language Shootout Benchmarks were updated 2 days ago
   http://shootout.alioth.debian.org/great/

For those original Doug Bagley tests click on "The Doug Bagley"



From michele.simionato at gmail.com  Fri Apr  8 06:17:17 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Apr 2005 03:17:17 -0700
Subject: decorating functions with generic signatures (not for the faint of
	heart)
Message-ID: <1112955437.518384.56960@g14g2000cwa.googlegroups.com>

I have realized today that defining decorators for functions
with generic signatures is pretty non-trivial.

Consider for instance this typical code:

#<traced_function.py>

def traced_function(f):
    def newf(*args, **kw):
        print "calling %s with args %s, %s" % (f.__name__, args, kw)
        return f(*args, **kw)
    newf.__name__ = f.__name__
    return newf

@traced_function
def f1(x):
    pass

@traced_function
def f2(x, y):
    pass

#</traced_function.py>

This is simple and works:

>>> from traced_function import traced_function, f1, f2
>>> f1(1)
calling f1 with args (1,), {}
>>> f2(1,2)
calling f2 with args (1, 2), {}

However, there is a serious disadvantage: the decorator replaces
a function with a given signature with a function with a generic
signature. This means that the decorator is *breaking pydoc*!

$ pydoc2.4 traced_function.f1
Help on function f1 in traced_function:

traced_function.f1 = f1(*args, **kw)

You see that the original signature of f1 is lost: even if I will get
an error when I will try to call it with a wrong number of arguments,
pydoc will not tell me that :-(

The same is true for f2:

$ pydoc2.4 traced_function.f2
Help on function f2 in traced_function:

traced_function.f2 = f2(*args, **kw)

In general all functions decorated by 'traced_function' will have the
same (too much) generic signature. This is a disaster for people
like me that rely heavily on Python introspection features.

I have found a workaround, by means of a helper function that
simplifies
the creation of decorators. Let's call this function 'decorate'.
I will give the implementation later, let me show how it works first.

'decorate' expects as input two functions: the first is the function
to be decorated (say 'func'); the second is a caller function
with signature 'caller(func, *args, **kw)'.
The caller will call 'func' with argument 'args' and 'kw'.
'decorate' will return a function *with the same signature* of
the original function, but enhanced by the capabilities provided
by the caller.

In our case we may name the caller function 'tracer', since
it just traces calls to the original function. The code makes
for a better explanation:

#<traced_function2.py>

from decorate import decorate

def tracer(f, *args, **kw):
    print "calling %s with args %s, %s" % (f.func_name, args, kw)
    return f(*args, **kw)

def traced_function(f):
    "This decorator returns a function decorated with tracer."
    return decorate(f, tracer)

@traced_function
def f1(x):
    pass

@traced_function
def f2(x, y):
    pass

#</traced_function2.py>

Let me show that the code is working:

>>> from traced_function2 import traced_function, f1, f2
>>> f1(1)
calling f1 with args (1,), {}
>>> f2(1,2)
calling f2 with args (1, 2), {}

Also, pydoc gives the right output:

$ pydoc2.4 traced_function2.f2
Help on function f1 in traced_function2:

traced_function2.f1 = f1(x)

$ pydoc2.4 traced_function2.f2
Help on function f2 in traced_function2:

traced_function2.f2 = f2(x, y)

In general all introspection tools using inspect.getargspec will
give the right signatures (modulo bugs in my implementation of
decorate).

All the magic is performed by 'decorate'. The implementation of
'decorate' is not for the faint of heart and ultimately it resorts
to 'eval' to generate the decorated function. I guess bytecode
wizards here can find a smarter way to generate the decorated function.
But my point is not about the implementation (which is very little
tested
at the moment). My point is that I would like to see something like
'decorate' in the standard library.
I think somebody already suggested a 'decorator' module containing
facilities to simplify the usage of decorators. This post is meant as
a candidate for that module. In any case, I think 'decorate' makes a
good example of decorator pattern.

Here is my the current implementation (not very tested):

#<decorate.py>

def _signature_gen(varnames, default_args, n_args, rm_defaults=False):
    n_non_default_args = n_args - len(default_args)
    non_default_names = varnames[:n_non_default_args]
    default_names = varnames[n_non_default_args:n_args]
    other_names = varnames[n_args:]
    n_other_names = len(other_names)
    for name in non_default_names:
        yield "%s" % name
    for name, default in zip(default_names, default_args):
        if rm_defaults:
            yield name
        else:
            yield "%s = %s" % (name, default)
    if n_other_names == 1:
        yield "*%s" % other_names[0]
    elif n_other_names == 2:
        yield "*%s" % other_names[0]
        yield "**%s" % other_names[1]

def decorate(func, caller):
    argdefs = func.func_defaults or ()
    argcount = func.func_code.co_argcount
    varnames = func.func_code.co_varnames
    signature = ", ".join(_signature_gen(varnames, argdefs, argcount))
    variables = ", ".join(_signature_gen(varnames, argdefs, argcount,
                                        rm_defaults=True))
    lambda_src = "lambda %s: call(func, %s)" % (signature, variables)
    dec_func = eval(lambda_src, dict(func=func, call=caller))
    dec_func.__name__ = func.__name__
    dec_func.__doc__ = func.__doc__
    dec_func.__dict__ = func.__dict__.copy()
    return dec_func

#</decorate.py>



From prabapython at yahoo.co.in  Fri Apr 22 02:36:37 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Fri, 22 Apr 2005 07:36:37 +0100 (BST)
Subject: regarding system function
Message-ID: <20050422063637.47212.qmail@web8403.mail.in.yahoo.com>

Dear All,

     In Php If I send a command to system function
then It will return 1 on success and 0 on failure.  So
based upon that value I can to further work.

     But In Python If I send a command to system
function then It will return 0 only for both
conditions(success and failure).  So What I need
to do for this.  I want the result like php system
function.


regards
Prabahar
 

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From demon_slayer2839 at yahoo.com  Thu Apr 28 13:34:44 2005
From: demon_slayer2839 at yahoo.com (demon_slayer2839 at yahoo.com)
Date: 28 Apr 2005 10:34:44 -0700
Subject: OOP
Message-ID: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>

Hey yall,
I'm new to Python and I love it. Now I can get most of the topics
covered with the Python tutorials I've read but the one thats just
stumping me is Object Orientation. I can't get the grasp of it. Does
anyone know of a good resource that could possibly put things in focus
for me? Thanks.



From Domenique.Tilleuil at gmail.com  Wed Apr 20 14:40:08 2005
From: Domenique.Tilleuil at gmail.com (Domenique.Tilleuil at gmail.com)
Date: 20 Apr 2005 11:40:08 -0700
Subject: pyGTK on Mouse over event ?
Message-ID: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>

hello,

Is there an event simular to the java event onMouseOver ?
I want to get the coordinates of the mouse pointer when it is over an
image ( GTKImage widget)

I've tried using the EventBox with the motion_notify but that only
seems to work when the mouse is pressed ?



From andrea_gavana at tin.it  Tue Apr  5 16:29:50 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Tue, 5 Apr 2005 22:29:50 +0200
Subject: Add System Path?!?
Message-ID: <4200063400021F9F@ims9c.cp.tin.it>

Hello NG,

    sorry, I forgot to mention that I am on Windows... 2000 or XP, I don't
think there will be any difference.

Thank you!

Andrea.



From brian at brianandkate.com  Tue Apr  5 14:11:56 2005
From: brian at brianandkate.com (Brian Blazer)
Date: Tue, 05 Apr 2005 18:11:56 GMT
Subject: playing with pyGoogle - strange codec error
References: <2005040410062316807%brian@brianandkatecom>
Message-ID: <2005040513115616807%brian@brianandkatecom>

On 2005-04-04 10:06:23 -0500, Brian Blazer <brian at brianandkate.com> said:

<snip>

You know, I am beginning to think that I MAY have stumbled on a bug 
here.  At first I was thinking that this issue was related to the 
offending character being out of range for the Mac.  Then I tried it on 
A MS machine and a linux box; all with the same error.

This does not happen when I wrote the same script in java.  This is 
making me wonder if there is an issue with the wrapper for the google 
api that was originally done in java.

For the sake of it, here is the full code (minus my google key).  It is 
going to look wierd, but those print statements are there so that I 
dont have to open the file it is writing to every time I want to see 
stuff.  it has my name hard coded into the search query.  The commented 
r.snippet.encode(mac_roman) was there to see if by changing the 
encoding, I could make it work (no luck).  I also tried putting

 #-*- coding: utf-8 -*-

right after the shebang (as listed here: 
http://www.python.org/peps/pep-0263.html).  Again, no help.

Anyway, here is the code ------------------------>

import google

google.LICENSE_KEY = 'insertKeyHere'
#print google.doSpellingSuggestion('helllo')
data = google.doGoogleSearch('Brian Blazer')
print 'Found %d results' % len(data.results)

searchData = open('searchData.txt','w')

for r in data.results:
#    r.snippet.encode('mac_roman')
    searchData.write ('Title: ' + r.title + '\n' + '\n')
    searchData.write ('URL: ' + r.URL + '\n' + '\n')
    searchData.write ('Snippet: ' + r.snippet + '\n' + '\n'+'\n')
    print r.URL
    print r.title
    print r.snippet



-- 
Nail a post to the Spalted Board. Free WW'ing software and forums.  
Regular freebies! http://www.spaltedboard.com



From zghelp at mail.powerleader.com.cn  Tue Apr 26 05:10:05 2005
From: zghelp at mail.powerleader.com.cn (zghelp)
Date: Tue, 26 Apr 2005 17:10:05 +0800
Subject: How to pass a arg of object to python's script in a c++ program?
Message-ID: <d4l14i$2vjm$1@mail.cn99.com>

/*I am sorry the prev post is a mistake...*/

//the c++ code

using namespace boost::python;

struct World
{
 void set(std::string msg) { this->msg = msg; }
 std::string greet() { return msg; }
 std::string msg;
};

BOOST_PYTHON_MODULE(hello)
{
 class_<World>("World")
  .def("greet", &World::greet)
  .def("set", &World::set)
  ;
}

int _tmain(int argc, _TCHAR* argv[])
{
 Py_Initialize();

 if (!Py_IsInitialized())
  return -1;

 inithello();

 PyRun_SimpleString("import sys");
 PyRun_SimpleString("sys.path.append('./')");

 PyObject* pName,*pModule,*pDict,*pFunc,*pArgs;

 pName = PyString_FromString("pytest");
 pModule = PyImport_Import(pName);
 if (!pModule)
  return -1;

 pDict = PyModule_GetDict(pModule);
 if (!pDict)
  return -1;

 pFunc = PyDict_GetItemString(pDict,"add");
 if (!pFunc || !PyCallable_Check(pFunc))
  return -1;

 World w;
 w.set("hi from main!");

 pArgs = PyTuple_New(3);
 PyTuple_SetItem(pArgs,0,Py_BuildValue("i",3));
 PyTuple_SetItem(pArgs,1,Py_BuildValue("i",4));
 PyTuple_SetItem(pArgs,2,Py_BuildValue("O",&w));

 try
 {
  PyObject_CallObject(pFunc,pArgs);
 }
 catch(error_already_set)
 {
  // handle the exception in some way
 }

 Py_DECREF(pName);
 Py_DECREF(pArgs);
 Py_DECREF(pModule);

 Py_Finalize();
 getchar();

 return 0;
}

//the python's script

import hello
from hello import *
def add(a,b,t):
 print "a + b = " + str(a+b)
 w = hello.World()
 w.set("hi from script!")
 print w.greet()
 print t.greet()
 return


but the exception occur when run to "print t.greet()"

How can I solve it?




From listspam at flowtheory.net  Fri Apr  8 13:02:38 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Fri, 8 Apr 2005 11:02:38 -0600
Subject: PPC OSX vs. x86 Linux
Message-ID: <f7551714add25c80ad72b99157571270@flowtheory.net>

Hello --

I writing some python code to do some analysis of my mail logs. I took 
a 10,000 line snippet from them (the files are about 5-6 million 
usually) to test my code with. I'm developing it on a Powerbook G4 
1.2GHz with 1.25GB of RAM and the Apple distributed Python* and I 
tested my code on the 10,000 line snippet. It took 2 minutes and 10 
seconds to process that snippet. Way too slow -- I'd be looking at 
about 20 hours to process a single daily log file.

Just for fun, I copied the same code and the same log snippet to a 
dual-proc P3 500MHz machine running Fedora Core 2* with 1GB of RAM and 
tested it there. This machine provides web services and domain control 
for my network, so it's moderately utilized. The same code took six 
seconds to execute.

Granted I've got the GUI and all of that bogging down my Mac. However, 
I had nothing else fighting for CPU cycles and 700MB of RAM free when 
my testing was done. Even still, what would account for such a wide, 
wide, wide variation in the time required to process the data file? The 
code is 90% regular expressions and string finds.

Theories? Thanks!

-jag


* versions are:
Python 2.3 (#1, Sep 13 2003, 00:49:11)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
and
Python 2.3.3 (#1, May  7 2004, 10:31:40)
[GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131

From jelleferinga at gmail.com  Tue Apr 26 07:31:24 2005
From: jelleferinga at gmail.com (jelle)
Date: 26 Apr 2005 04:31:24 -0700
Subject: how to pass an array to a VB array via COM
Message-ID: <1114515084.138728.26180@g14g2000cwa.googlegroups.com>

Hi,

I'm trying to script Rhino -the nurbs modeller, not the server soft-
via COM.
Which is good fun, except i cant seem to pass arrays to the program.
I suppose its expecting VB arrays, and is not to keen when i send a
tuple:

RS.AddCurve(((1,2,3),(4,5,6),(7,8,9)),3)
---
Traceback (most recent call last):
  File "<input> ", line 1, in ?
  File "c:\Python23\lib\site-packages\jf\interface\RhinoScript.py",
line 48,
in AddCurve
    return self._ApplyTypes_(77, 1, (12, 0), ((12, 0), (12, 16)),
'AddCurve', None,vaPoints, vaDegree)
  File "c:\Python23\lib\site-packages\win32com\client\__init__.py",
line
446, in _ApplyTypes_
    return self._get_good_object_(
com_error: (-2147352567, 'Exception occurred.', (6, 'RhinoScript_m',
'Type
mismatch in parameter.  One-dimensional array required.', 'C:\\Program
Files\\Rhinoceros 3.0\\RhinoScript_m.HLP', 393222, 0), None)
---

This is somewhat puzzling, since when i define points in the
application, these are returned as a tuple of tuples:


>>>s = RS.GetPoints()
>>>print s
((-7.0, -30.0, 0.0), (15.0, -24.0, 0.0), (-7.0, 12.0, 0.0), (14.0,
29.0,
0.0), (28.0, 10.0, 0.0), (20.0, 1.0, 0.0))

I've been searching this list for a solution, but didnt find anything i
could use. Any ideas?

Cheers,

Jelle



From andrevnobre at gmail.com  Tue Apr  5 09:27:34 2005
From: andrevnobre at gmail.com (Andre Nobre)
Date: Tue, 5 Apr 2005 10:27:34 -0300
Subject: start python web programming
Message-ID: <b76c48b9050405062764827c4c@mail.gmail.com>

I should implement a simple http/database page, based on python. I read some 
texts and it?s strange how python deal with html output. It?s something like 
Servlet... is there any diferent way to do that? Something like just 
bussiness code, applied in an MVC framework, or just like it. Thanks and 
sorry about my english.

-- 
Andr? Nobre
andrevnobre at gmail.com
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From steven.bethard at gmail.com  Sun Apr 24 23:24:22 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 24 Apr 2005 21:24:22 -0600
Subject: Multiple tuples for one for statement
In-Reply-To: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
Message-ID: <-fCdnSQ0XbR6__HfRVn-ug@comcast.com>

Harlin Seritt wrote:
> I have three tuples of the same size: tup1, tup2, tup3
> 
> I'd like to do something like this:
> 
> for a,b,c in tup1, tup2, tup3:
>    print a
>    print b
>    print c
> 
> Of course, you get an error when you try to run the pseudocode above.
> What is the correct way to get this done?

for a, b, c in zip(tup1, tup2, tup3):
     print a
     print b
     print c

If your tuples become iterators, look into itertools.izip.

STeVe


From sjmaster at gmail.com  Wed Apr 27 11:55:39 2005
From: sjmaster at gmail.com (Steve M)
Date: 27 Apr 2005 08:55:39 -0700
Subject: compile shebang into pyc file
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
Message-ID: <1114617339.180840.128590@z14g2000cwz.googlegroups.com>

I just happened across the page linked to below, and remembered this
thread, and, well... here you go:

http://www.lyra.org/greg/python/

Executable .pyc files

    Ever wanted to drop a .pyc file right into your web server's
cgi-bin directory? Frustrated because the OS doesn't know what to do
with a .pyc? (missing the #! line)

    Look no further! :-) Below is a tiny Bash script to do this. "cat"
your .pyc onto the end of this and drop it wherever you need direct
execution of that .pyc



From tzot at sil-tec.gr  Wed Apr 20 12:02:00 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 19:02:00 +0300
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
	<d45to7$g02$1@news.tsystems.kiev.ua>
Message-ID: <a5vc619vkk2mbrn67o7jm28mvcg8mq22mp@4ax.com>

On Wed, 20 Apr 2005 18:47:37 +0300, rumours say that Maxim Kasimov
<kasimov at i.com.ua> might have written:

>by the way, "goto" statement will be useful for writing more powerful obfuscators

At this point in time you might want to reconsider what are the true
reasons you like python (if you really do :)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From mefjr75 at hotmail.com  Fri Apr 15 17:52:42 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 15 Apr 2005 14:52:42 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <mailman.1980.1113585414.1799.python-list@python.org>
References: <mailman.1980.1113585414.1799.python-list@python.org>
Message-ID: <1113601962.316817.113510@g14g2000cwa.googlegroups.com>

Sounds good should work fine ;)
M.E.Farmer



From g.brandl at gmx.net  Tue Apr  5 15:50:52 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Tue, 05 Apr 2005 21:50:52 +0200
Subject: Best editor?
In-Reply-To: <1112729823.852393.107000@o13g2000cwo.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<1112729823.852393.107000@o13g2000cwo.googlegroups.com>
Message-ID: <3bg8flF6kd62dU1@individual.net>

beliavsky at aol.com wrote:
> ChinStrap wrote:
>> When not using the interactive prompt, what are you using? I keep
>> hearing everyone say Emacs, but I can't understand it at all. I keep
>> trying to learn and understand why so many seem to like it because I
>> can't understand customization even without going through a hundred
>> menus that might contain the thing I am looking for (or I could go
>> learn another language just to customize!).
> 
> Epsilon http://www.lugaru.com/ is a commercial Emacs-like editor with a
> built-in Python mode and will automatically treat .py files as being
> Python. No fiddling is required. It works well, and I spend many of my
> waking hours in front of an Epsilon (even created a Fortran mode :)). I
> think Epsilon is used more on Windows than Linux/Unix, where Emacs and
> XEmacs have existed for a long time, but an Epsilon license contains
> binaries for Linux and other Unices as well.

$250 just for an Emacs clone? Sorry, but this is a bit greedy. Sure, it does
some things differently, but in the same time you learn Epsilon, you can
learn Emacs.

> XEmacs/Emacs frustrate me, for example constantly asking if I want to
> enable a "recursive mini-buffer", which I have no clue about or
> interest in. Epsilon is a well-done Emacs IMO.

constantly? You seem to make fundamental mistakes using Emacs. Reading one or
two tutorials could have helped.

mfg
Georg


From harlinseritt at yahoo.com  Sun Apr 24 05:20:47 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Apr 2005 02:20:47 -0700
Subject: Decent Win32All Documentation
Message-ID: <1114334447.365988.197870@o13g2000cwo.googlegroups.com>

Does anyone know of any decent documenation on Mark Hammond's win32all
modules? I have tried looking at the documentation .chm file that comes
with it, Python Programming On Win32 (OReilly book) and ActiveState's
documentation and have found them all lacking -- yes I need it broken
down to me.

What I am hoping to do is to work on some Python versions of PSTools. I
think the win32 modules will be perfect for helping me do this,
however, I am having a (more than it should be) difficult time making
sense of the win32process module.

Any help would be appreciated.

Thanks,

Harlin Seritt



From codecraig at gmail.com  Thu Apr 14 15:13:04 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 12:13:04 -0700
Subject: py2exe + XML-RPC problem
In-Reply-To: <1113496062.959951.41150@l41g2000cwc.googlegroups.com>
References: <1113496062.959951.41150@l41g2000cwc.googlegroups.com>
Message-ID: <1113505983.959632.168610@f14g2000cwb.googlegroups.com>

sorry, I am actually still getting the 500 internal error I reported
earlier.

thanks for ur input.



From michele.simionato at gmail.com  Mon Apr 25 02:02:49 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 24 Apr 2005 23:02:49 -0700
Subject: Decorator pattern for new-style classes ?
In-Reply-To: <1114243122.753678.311960@l41g2000cwc.googlegroups.com>
References: <1114243122.753678.311960@l41g2000cwc.googlegroups.com>
Message-ID: <1114408969.417640.272100@o13g2000cwo.googlegroups.com>

I have no time for a long discussion, but the code should
speak for itself:

class Container(object):
    def __init__(self, content):
        self.content = content
    def __str__(self):
        return "<Container containing %r>" % self.content

class Wrapped(object):
    def __init__(self, obj):
        self._obj = obj
    def __getattribute__(self, name):
        obj = super(Wrapped, self).__getattribute__("_obj")
        return getattr(obj, name)

w = Wrapped(Container("hello"))

print w.content
print w.__str__() # works
print w # does not work as you would expect, see bug report SF 729913

The discussion around the bug report is worth reading,

             Michele Simionato



From winkler1 at gmail.com  Wed Apr 27 19:26:02 2005
From: winkler1 at gmail.com (Jeff  Winkler)
Date: 27 Apr 2005 16:26:02 -0700
Subject: Trigraph Idiom - Original?
Message-ID: <1114644362.854156.317830@l41g2000cwc.googlegroups.com>

I've come up with a trigraph idiom, am curious if it's been done before
(probably). I like to use trigraphs occasionally.

Scenario: I'm doing an RSS->Javascript conversion for our intranet. I'd
like to use different CSS class if a post is new. Code:

hoursOld=abs(time.time()-time.mktime(i.modified_parsed))/3600
cssClass=['rssLink','rssLinkNew'][hoursOld<12]
entry='<a href="%s" class="%s" target="detail">%s</a>' %
(cssClass,i['link'],i['title'])

So, ['rssLink','rssLinkNew'] is index by boolean value- False:0, or
True:1.

I realize many will find this hideous, but 3 lines of code to do
something simple seems equally bad. Thoughts? Is there a better way?

- Jeff



From escalation746 at yahoo.com  Sun Apr  3 21:41:59 2005
From: escalation746 at yahoo.com (robin)
Date: Mon, 04 Apr 2005 02:41:59 +0100
Subject: SimpleRPCServer
References: <4243efb6$0$248$14726298@news.sunsite.dk>
	<mailman.854.1111756390.1799.python-list@python.org>
Message-ID: <7n615192gnqbjs25dvvjttpvir72fqu2ot@4ax.com>

Skip Montanaro <skip at pobox.com> wrote:

>First, from my reading of SimpleXMLRPCServer, I don't think _dispatch()
>belongs at that level.  It belongs in the request handler class or in a
>separate dispatcher class, depending on what version of Python you're using.

Quite so. As a variant I just use verify_request() to persist the
client IP address, and then wait until _dispatch() to do everything
else.

class RPCServer(SimpleXMLRPCServer):
	def verify_request(self, handler, address):
		self.client_ip, self.client_port = address
		return True

	def _dispatch(self, method, args):
		do_something(self.client_ip)

Though using a firewall would not be remiss. :-)

-- robin


From apardon at forel.vub.ac.be  Mon Apr  4 09:28:53 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 4 Apr 2005 13:28:53 GMT
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
	<7xmzshvm94.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd52g8j.20i.apardon@rcpc42.vub.ac.be>

Op 2005-04-02, Paul Rubin schreef <http>:
> Have you looked at this?  A paper about adding asynchronous exceptions
> to Python.
>
> http://www.cs.williams.edu/~freund/papers/02-lwl2.ps

Looks interresting, but I doubt python will have it in the near
future. I'm very pessimitic about python development in this
area.

-- 
Antoon Pardon


From ojokimu at yahoo.co.uk  Mon Apr  4 20:03:56 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Tue, 5 Apr 2005 01:03:56 +0100 (BST)
Subject: Super Newbie Question
In-Reply-To: 6667
Message-ID: <20050405000356.90110.qmail@web26807.mail.ukl.yahoo.com>


--- joeyjwc at gmail.com wrote:

> In short, how might I go about deleting just the contents of a file?
> I tried several methods with my limited knowledge but had no luck.

I suppose the simplest thing to do would be to write an empty string to
the file:

>>> f = open('tmpfile.txt', 'w')
>>> f.write('')
>>> f.close()   # or f.flush(), if keeping open

HTH

 

John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From alexk at mailinator.com  Thu Apr 28 13:54:20 2005
From: alexk at mailinator.com (alexk)
Date: 28 Apr 2005 10:54:20 -0700
Subject: split question
In-Reply-To: <3sudncKb35gWh-zfRVn-vA@comcast.com>
References: <1114707749.969274.293560@l41g2000cwc.googlegroups.com>
	<3sudncKb35gWh-zfRVn-vA@comcast.com>
Message-ID: <1114710859.990276.183880@o13g2000cwo.googlegroups.com>

Yes, all of you are right. Thank you all for your answers - I'll use a
regex.



From mylastnameruntogether at mycompanyname.com  Mon Apr 11 20:31:41 2005
From: mylastnameruntogether at mycompanyname.com (Brandon J. Van Every)
Date: Tue, 12 Apr 2005 00:31:41 GMT
Subject: web authoring tools
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>
	<Xns96356AFD03D32vaneveryindiegamedes@207.69.189.191>
	<mailman.1671.1113204815.1799.python-list@python.org>
	<op.so2yz4blqfv3if@localhost>
Message-ID: <Xns9635B27CBB14Evaneveryindiegamedes@207.69.189.191>

=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?= <peufeu at free.fr> wrote in
news:op.so2yz4blqfv3if at localhost: 

> 
>>>> Ideally, I would like an open source website + html design tool
>>>> implemented in Python
>>>
>>> didn't you just say that ideally, you wanted a tool written in lisp
>>> or scheme?
>>
>> I honestly got a little tired of the tone of the answers I was
>> getting from that crowd, about what an idiot I am.  My query there is
>> still 
> 
>      You mean you are interested in a web application programming
>      framework in  
> the spirit of Seaside, or in a HTML/CSS editor in the spirit of  
> Dreamweaver ?

I believe Dreamweaver-esque.  I see myself writing articles and eventually 
doing snazzy eye candy layouts.  I do not see myself engaging in elaborate 
flow control or anything terribly programmatic.  I want to concentrate on 
the content, not the mechanism.


-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

"The pioneer is the one with the arrows in his back."
                          - anonymous entrepreneur


From simon.brunning at gmail.com  Fri Apr 22 04:51:01 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 22 Apr 2005 09:51:01 +0100
Subject: Run Unix shell command $ parse command line arguments in python
In-Reply-To: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>
References: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>
Message-ID: <8c7f10c605042201514644fa7b@mail.gmail.com>

On 21 Apr 2005 23:39:03 -0700, rkoida at yahoo.com <rkoida at yahoo.com> wrote:
> Kindly suggest me some ideas/comments.

Why don't you make a start, and come back to us with whatever problems
you encounter? We're happy to help, but we aren't going to do it for
you.

Andrew Dalke's "Wrapping command-line programs" series might come in
handy: http://www.dalkescientific.com/writings/diary/archive/2005/04/12/wrapping_command_line_programs.html

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From shalabh at cafepy.com  Sat Apr  2 13:30:34 2005
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Sat, 02 Apr 2005 10:30:34 -0800
Subject: Performance issue
In-Reply-To: <edce2a2e05040207452bb2a1ad@mail.gmail.com>
References: <edce2a2e05040207452bb2a1ad@mail.gmail.com>
Message-ID: <d2mo9e$4e2$2@sea.gmane.org>

Tom Carrick wrote:
> Hi,
> 
> In my attempted learning of python, I've decided to recode an old
> anagram solving program I made in C++. The C++ version runs in less
> than a second, while the python takes 30 seconds. I'm not willing to
> think it's just python being slow, so I was hoping someone could find
> a faster way of doing this. Also, I was wondering if there was a more
> builtin, or just nicer way of converting a string to a list (or using
> the sort function on a list) than making a function for it.

<code snipped>

Others have already given a good commentary and alternate suggestions.
Here is some more (and some disagreements):

* Know your data structures (and how long different operations take).
Like don't do del L[0] unless required. This generally comes from
experience (and asking on this list).

* list(any_sequence_here) will build a list from the sequence. There are
usually easy ways of converting built-in types - the Python docs will
help you here.

* Try to write code as close to an english description of the problem as
possible. For example 'for word in words:' rather than using counters
and []. This is usually faster, clearer and IMO an important ingredient
of being 'Pythonic'.

Anyway here's my rendition of your program:

###
anagram = raw_input("Find anagrams of word: ")
lanagram = list(anagram)
lanagram.sort()
sorted_anagram = ''.join(lanagram).lower()

f = open('/usr/share/dict/words', 'r')

found = []

for word in f:
     word = word.strip('\n')
     if len(word)==len(sorted_anagram):
	sorted_word = list(word)
	sorted_word.sort()
	sorted_word = ''.join(sorted_word)
         if sorted_word == sorted_anagram:
	    found.append(word)

print "Anagrams of %s:" % anagram

for word in found:
     print word
###

Hopefully it is fast enough.

Shalabh



From laura.skosnik at gmail.com  Tue Apr 19 20:09:06 2005
From: laura.skosnik at gmail.com (lauras)
Date: 19 Apr 2005 17:09:06 -0700
Subject: Python SSL Socket issue
Message-ID: <f759d2e6.0504191609.50d5f35a@posting.google.com>

Hello,

We are having an issue with Python SSL sockets using Apache and mod_python.  

When we try to get an SSL connection using the following code:

            con = httplib.HTTPSConnection( self.HOST, self.PORT )
            #con.set_debuglevel(10)
            con.putrequest( "POST", "" )
            con.putheader( "Content-Type", "text/xml" )
            con.putheader( "content-length", int(len(cmd)) )
            con.endheaders()
            con.send( cmd )

We get the following error:

         con.endheaders()
        File "/usr/lib/python2.3/httplib.py", line 715, in endheaders
         self._send_output()
        File "/usr/lib/python2.3/httplib.py", line 600, in _send_output
         self.send(msg)
        File "/usr/lib/python2.3/httplib.py", line 567, in send
         self.connect()
        File "/usr/lib/python2.3/httplib.py", line 988, in connect
         ssl = socket.ssl(sock, self.key_file, self.cert_file)
        File "/usr/lib/python2.3/socket.py", line 73, in ssl
         return _realssl(sock, keyfile, certfile)
     TypeError: ssl() argument 1 must be _socket.socket, not _socketobject


Has anyone encountered this before or has any suggestions?

Thanks,
Laura


From farcepest at gmail.com  Thu Apr 14 18:25:44 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 14 Apr 2005 15:25:44 -0700
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113339252.851450.184620@z14g2000cwz.googlegroups.com>
	<op.so424whjqfv3if@localhost>
	<200504130853.31989.hancock@anansispaceworks.com>
	<mailman.1841.1113405095.1799.python-list@python.org>
Message-ID: <1113517544.835410.238190@o13g2000cwo.googlegroups.com>

Steve Holden wrote:

> I don't know about the whole picture, but I know form evidence on
this
> group that there are PostgreSQL driver modules (the name "psycopg"
comes
> to mind, but this may be false memory) that appear to take diabolical

> liberties with DBAPI-2.0, whereas my experience with MySQLdb has been

> that I can interchange the driver with mxODBC (for example) as a
drop-in
> replacement (modulo the differing paramstyles :-().

There are a couple reasons for the interchangability: Marc-Andre
Lemburg, the author of mxODBC, was also one of the main people involed
with the DB API spec (now PEP-249). MySQLdb was also written with the
spec in mind. One reason for this is that prior to writing MySQLdb, I
used mxODBC in an application I wrote, connecting to a database called
Solid: http://www.solidtech.com/

I don't think they sell the database as a separate product any more; at
least my memory from the late 90's is that they stopped doing that.

I've also done a bit of database work with pyscopg (a few years back),
and there's not a marked difference between that and MySQLdb, as I
recall. Parameter styles are the main difference between the three
(MySQLdb and psycopg use pyformat or %s, and mxODBC uses qmark or ?).
MySQLdb-1.4/2.0 will most likely support both styles as the latter is
what MySQL expects for the Prepared Statement API that is new in 4.1.
By "support both", I mean that you'll be able to configure at run-time
which style you want to use.

For feature comparisons, check out:

http://dev.mysql.com/tech-resources/crash-me.php

These comparisons are a little old, but you can compare MySQL-4.1.1
against PostgreSQL-7.3.3 and others.

If speed is a critical factor, get both (they're free), put in some
representative data for your application, and start benchmarking.



From john_paul_ii at vatican.va  Mon Apr  4 01:10:27 2005
From: john_paul_ii at vatican.va (Ioannes Paulus PP. II (Karol Wojtyla))
Date: Mon, 4 Apr 2005 05:10:27 GMT
Subject: Last rites declaration of Ioannes Paulus PP. II (Karol Wojtyla)
Message-ID: <e315f879.aba1ca89@news.vatican.va>

"The unforgiveable sins this earth must confront and overcome are 
 Nationalism, capitalism, and hoarding.  The idea of every nation 
 should be forgot, price should be struck from the commons, and 
 princes should be seen for the devils they are.  The sins include 
 our church, secret societies, and other religions which make of 
 the spirit of God a divide." 

Last rites declaration of Ioannes Paulus PP. II (Karol Wojtyla)
2nd April 2005


















--
o SECTION II: THE MISERY OF MAN WITHOUT GOD
        o SECTION III: OF THE NECESSITY OF THE WAGER
        o SECTION IV: OF THE MEANS OF BELIEF
        o SECTION V: JUSTICE AND THE REASON OF EFFECTS
        o SECTION VI: THE PHILOSOPHERS
        o SECTION VII: MORALITY AND DOCTRINE
        o SECTION VIII: THE FUNDAMENTALS OF THE CHRISTIAN RELIGION
        o SECTION IX: PERPETUITY
        o SECTION X: TYPOLOGY
        o SECTION XI: THE PROPHECIES
        o SECTION XII: PROOFS OF JESUS CHRIST
        o SECTION XIII: THE MIRACLES
        o SECTION XIV: APPENDIX: POLEMICAL FRAGMENTS

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

                                   PENS?ES

                              by Blaise Pascal

                                    1660

                         translated by W. F. Trotter

                                   PENS?ES

                  SECTION I: THOUGHTS ON MIND AND ON STYLE

1. The difference between the mathematical and the intuitive mind.--In the
one, the principles are palpable, but removed from ordinary use; so that for
want of habit it is difficult to turn one's mind in that direction: but if
one turns it thither ever so little, one sees the principles fully, and one
must have a quite inaccurate mind who reasons wrongly from principles so
plain that it is almost impossible they should escape notice.

But in the intuitive mind the principles are found in common use and 




From roccomoretti at hotpop.com  Sun Apr 24 17:16:29 2005
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Sun, 24 Apr 2005 16:16:29 -0500
Subject: Variables
In-Reply-To: <mailman.2381.1114320663.1799.python-list@python.org>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b0d03_3@newspeer2.tds.net>	<426B1300.6090802@cloudthunder.com>	<d4f4ps$7cu$1@sea.gmane.org>	<426B1A6F.2060401@cloudthunder.com>	<d4f9n1$fah$1@sea.gmane.org>
	<mailman.2381.1114320663.1799.python-list@python.org>
Message-ID: <d4h2bd$jik$1@news.doit.wisc.edu>

Richard Blackwood wrote:
> Robert Kern wrote:
> 
>> His problem is that he doesn't respect that technical terms can have 
>> different meanings in different fields and contexts. No authoritative 
>> reference can solve his problem for him. He's being overly pedantic 
>> about a field in which *he* is clearly not an authority. You can't 
>> convince such people, only ignore them.
>>
> Unfortunately that's not much of an option for me. We are working on a 
> project together so I am forced to either prove his notion incorrect or 
> I give in to his conception. *throws hands in air*

Why are *you* the one that his notion is incorrect? Why isn't he the one 
that has to prove *you* incorrect? Put forth the Wikipedia article, and 
then the ball is in his court to disprove the arguments therein with a 
more authoritative source. (At least this is my understanding of the 
common rules of debate.)


From steven.bethard at gmail.com  Mon Apr 11 14:58:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 11 Apr 2005 12:58:09 -0600
Subject: Creating a new instance of a class by what is sent in?
In-Reply-To: <1113244930.403334.66150@z14g2000cwz.googlegroups.com>
References: <1113244930.403334.66150@z14g2000cwz.googlegroups.com>
Message-ID: <kpGdnReVk_9eVcffRVn-vg@comcast.com>

ChinStrap wrote:
> I am sorry if this is obvious, but I am not seeing it.  How would I go
> about creating a new type that is of the same type as a class sent into
> the function?
> 
> new = foo.__init__() refers to the current foo, not a new fresh
> instance of my class.  The only way I can think of is to make a large
> if-elif chain of isinstances, but that loses the generality I am after.

It looks like you want to create a new _instance_ of the same type as an 
_instance_ passed in to a function.  If this is correct, you can do this by:

py> def new(obj):
...     return type(obj)()
...
py> new('s')
''
py> new(3)
0
py> new(['a', 'b'])
[]
py> new((5.3, 3j))
()

If you need to support old-style classes, replace type(obj) with 
obj.__class__.

If this is not the question you meant to ask, could you reword things? 
Creating a new _type_ that is the same _type_ as something else doesn't 
make much sense to me.  If it's a new _type_, then it shouldn't be the 
same as any existing type.

STeVe


From http  Sat Apr  2 00:13:11 2005
From: http (Paul Rubin)
Date: 01 Apr 2005 21:13:11 -0800
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1223.1112417955.1799.python-list@python.org>
Message-ID: <7xy8c1hic8.fsf@ruckus.brouhaha.com>

Tim Peters <tim.peters at gmail.com> writes:
> The GIL is your friend here:
> 
>     import itertools
>     f = itertools.count().next

Thanks, I was hoping something like this would work but was not sure I
could rely on it.

> A similar thing can be done with xrange.  But either way sucks if you
> call it often enough to exceed the size of a Python short int
> (platform C long).  The obvious way with an explicit mutex doesn't
> have that problem.

Xrange, of course :).  I don't need to exceed the size of a short int,
so either of these should work fine.  I wonder what measures the Pypy
implementers will take (if any) to make sure these things keep
working, but for now I won't worry about it.

Out of interest, are the above guaranteed to work under Jython?  What
I'm doing right now is a short-term thing that will only have to run
under CPython, but I like to do things the right way when I can.


From Facundo.Batista at telefonicamoviles.com.ar  Thu Apr 14 13:59:14 2005
From: Facundo.Batista at telefonicamoviles.com.ar (Batista, Facundo)
Date: Thu, 14 Apr 2005 14:59:14 -0300
Subject: PyAr - Python Argentina 8th Meeting, today
Message-ID: <A128D751272CD411BC9200508BC2194D053C827E@escpl.tcp.com.ar>

The Argentine Python User Group, PyAr, will have its eighth
meeting today at 7:00pm.


Agenda
------

Despite our agenda tends to be rather open, this time we would
like to cover these topics:

- Conclusions of PyAr in PyCon 2005.
- See what we'll do with the t-shirts, and how we'll export them.
- Analyze a future meeting point.

	
Where
-----

We're meeting at Hip Bar, Hip?lito Yirigoyen 640, Ciudad de Buenos
Aires, starting at 19hs. We will be in the back room, so please ask
the barman for us.


About PyAr
----------

For more information on PyAr see http://pyar.decode.com.ar (in Spanish), 
or join our mailing list (Also in Spanish. For instructions see 
http://pyar.decode.com.ar/Members/ltorre/listademail)

We meet on the second Thursday of every month.

.	Facundo
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From mwm at mired.org  Wed Apr 13 18:48:04 2005
From: mwm at mired.org (Mike Meyer)
Date: Wed, 13 Apr 2005 17:48:04 -0500
Subject: permission
References: <425c8b44$1@dnews.tpgi.com.au>
	<mailman.1815.1113362028.1799.python-list@python.org>
Message-ID: <86aco2uwd7.fsf@guru.mired.org>

Skip Montanaro <skip at pobox.com> writes:

>     James> Is it possible to check if you have permission to access and or
>     James> change a directory or file?
>
> Yes, but it's generally much easier to try, then recover from any errors:

Especially since the answer to the question may change between
checking and trying - so you have to be prepared to deal with failure
either way.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From http  Sat Apr  2 02:54:13 2005
From: http (Paul Rubin)
Date: 01 Apr 2005 23:54:13 -0800
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
Message-ID: <7xsm29txzu.fsf@ruckus.brouhaha.com>

Skip Montanaro <skip at pobox.com> writes:
> How about (untested):
> 
>     import Queue
>     counter = Queue.Queue()
>     counter.put(0)
>     def f():
>         i = counter.get()
>         counter.put(i+1)
>         return i

Hmmm, that's a bit messier than I hoped for, but it looks sure to work.

I think for my immediate requirement, I'm going to use xrange as Tim
suggested.  However, I can't be sure that will work in non-GIL
implementations.


From Bill at SynectixLtd.com  Mon Apr 18 11:28:00 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Mon, 18 Apr 2005 15:28:00 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
	<1113834504.919986.129180@z14g2000cwz.googlegroups.com>
Message-ID: <d40jm0$b93$1@sparta.btinternet.com>


"A.B., Khalid" <abkhd at earth.co.jp> wrote in message 
news:1113834504.919986.129180 at z14g2000cwz.googlegroups.com...
> Bill Davy wrote:
>> I downlaoded and installed
>> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
>>
>> I'm trying to build an extension using SWIG 1.3.24 and the linker
> needs
>> python24_d.lib (I do not have the DLL either).  I've not found it in
> any of
>> the
>> downloads.

> I am no expert in MSVC6, but it sounds like maybe you need to supply
> the no-debug switch in your extention setup.py file: /d NDEBUG.
>
> In case that does not work and help on this is not forthcoming, you can
> always try pyMinGW[1].
>
>
> Regards,
> Khalid


Hmm, that's one possibility but I really do need to keep the debugger 
version going.  I'm only just getting started.  Any other suggestions? 




From gamma-ray at dope.comcast.net  Fri Apr 29 23:37:39 2005
From: gamma-ray at dope.comcast.net (Anthony D'Agostino)
Date: Fri, 29 Apr 2005 23:37:39 -0400
Subject: Sorting an Edge List
References: <fLqdne0t4Y81OO_fRVn-qw@comcast.com>
	<roy-5F8B9B.18125729042005@reader1.panix.com>
Message-ID: <3YOdncf7-p0aYO_fRVn-tA@comcast.com>

I found my old bubble sort solution:

============================================
def esort(edges):
    while 1:
        swaps = 0
        for j in range(len(edges)-2):
            if edges[j][1] != edges[j+1][0]:
                edges[j+1],edges[j+2] = edges[j+2],edges[j+1] # swap
                swaps = 1
        if swaps == 0: break
    return edges

print esort([('A','Y'), ('J','A'), ('Y','J')])
print esort([(5,0), (6, -12), (0,6), (-12, 3)])
============================================

The list can be any length and there will always be multiple valid 
solutions, depending on which edge you start with. I'm using this to sort 
edges for mesh subdivision. I just thought there might be a more elegant way 
to write it. 




From tjreedy at udel.edu  Mon Apr  4 12:36:05 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 4 Apr 2005 12:36:05 -0400
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com><20611953.SkRsez8GTE@news.perlig.de><11516i9g0usp235@corp.supernews.com><d2qnf5$a1b$1@news.web.de>
	<1152q99c7pjjl04@corp.supernews.com>
Message-ID: <d2rqa2$5tk$1@sea.gmane.org>

> what book or books on regexes

A standard is Mastering Regular Expressions, 2nd ed, by xxx (sorry, forget)

TJR





From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 06:18:10 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 11:18:10 +0100
Subject: how to explain such codes, python's bug or mine?
In-Reply-To: <d3iqhe$1s0l$1@mail.cn99.com>
References: <d3iqhe$1s0l$1@mail.cn99.com>
Message-ID: <d3irjm$msg$1@scotsman.ed.ac.uk>

MaHahaXixi wrote:
>>>>j = range(20)
>>>>print j
> 
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
> 
>>>>for k in j:
> 
>  if k <= 10:
>   j.remove(k)
> 
> 
> 
>>>>print j
> 
> [1, 3, 5, 7, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19]
> 
> 
> 
> Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "copyright", "credits" or "license()" for more information.
> 
> i think python do convert there codes to such style:
> for (i = 0; i < len(j); i++)
>    k = j[i]
>    ......

> what do u think?
> 
> 

I'm not quite sure of your question but with the second style you're not 
attempting to change the original list but make a copy. That's perfectly 
easy to do in Python as it is. The exampmle is a cautionary one about 
changing the list on which you are iterating.

Jim


From jjl at pobox.com  Fri Apr 29 15:29:45 2005
From: jjl at pobox.com (John J. Lee)
Date: 29 Apr 2005 20:29:45 +0100
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
	<d4qsmj$5gr$1@domitilla.aioe.org> <d4tk6l$hb3$1@sea.gmane.org>
Message-ID: <ll71peja.fsf@pobox.com>

Steve Holden <steve at holdenweb.com> writes:
[...]
> There's nothing wrong with open source projects catering to a market,
> and there's nothing wrong with running open source software on a
> proprietary operating system. To behave otherwise might reduce the
> growth opportunities for Python and its community.
> 
> no-zealotry-please-ly y'rs  - steve
[...]

I'm hesitant to label everybody who disagrees with you (and me) on
that a zealot.  Though I tend to take the same side you do, I'm not
entirely sure it's not just laziness on my part that I think that way.

Seems to me that holding opinions such as "it's a bad thing to support
open source software on closed source systems, and you should not do
it, for the common good" is far from crazy, even though I don't
currently happen to hold that view.


John



From sean_mcilroy at yahoo.com  Mon Apr  4 02:39:12 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 3 Apr 2005 23:39:12 -0700
Subject: the bugs that try men's souls
References: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>
	<1112534521.797702.53630@l41g2000cwc.googlegroups.com>
Message-ID: <e5063e96.0504032239.64bc8d25@posting.google.com>

<later>
Wow again. I had a real "V8 moment" when I looked at your solution
(smacking my forhead, groaning ruefully, etc). You were right: my
intention was simply to hide the trivial cases from view; I completely
missed the fact that I was now testing for membership in a different
set. I should have remembered that python "plays fair", and looked a
little harder to find my mistake.

Thanks again,
Sean


From bokr at oz.net  Sun Apr 24 16:51:02 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 24 Apr 2005 20:51:02 GMT
Subject: Bounding box on clusters in a 2D list
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<426b0f51.369660724@news.oz.net>
	<1114361089.412010.290250@g14g2000cwa.googlegroups.com>
Message-ID: <426c04ca.432501303@news.oz.net>

On 24 Apr 2005 09:44:49 -0700, "superprad at gmail.com" <superprad at gmail.com> wrote:

>Richter,yes what I am looking for is for cluster with rectangular
>bounding boxes as you explained in the first figure.
>
Sorry, not your fault, but I'm still not clear on diagonal connection/separation.
E.g., (removing punctuation ;-) is this 3 boxes or do the top left and bottom right
connect at their touching corners and thus become bounded with a rectangle that then
also includes the little box at the top right?

      +-------+   +---+
    0 | 1   1 | 0 | 1 |
      |       |   +---+
    0 | 1   1 | 0   0
      +-------+?------+
    0   0   0 ? 1   1 |
              |       |
    0   0   0 | 0   1 |
              +-------+

      +-------+   +---+      +-------+???+---+       +---------------+  
    0 | 1   1 | 0 | 1 |    0 | 1   1 | 0 | 1 |     0 | 1   1   0   1 |  
      |       |   +---+      |       |   +---+       |               |  
    0 | 1   1 | 0   0      0 | 1   1 | 0   0 ?     0 | 1   1   0   0 |  
      +-------+?------+ =>?  |       +-------+  =>   |               |  
    0   0   0 ? 1   1 |    0 | 0   0   1   1 |     0 | 0   0   1   1 |  
              |       |      |               |       |               |  
    0   0   0 | 0   1 |    0 | 0   0   0   1 |     0 | 0   0   0   1 |  
              +-------+      +---------------+       +---------------+  

And what about nested boxes?

   +-------------------+  
 0 | 1   1   1   1  1  |  
   |                   |  
 0 | 1   0   0   0  1  |  
   |       +---+       |  
 0 | 1   0 | 1 | 0  1  |  
   |       +---+       |  
 0 | 1   0   0   0  1  |  
   |                   |  
 0 | 1   1   1   1  1  |  
   +-------------------+  

Regards,
Bengt Richter


From xah at xahlee.org  Tue Apr 12 06:25:33 2005
From: xah at xahlee.org (Xah Lee)
Date: 12 Apr 2005 03:25:33 -0700
Subject: [perl-python] Python documentation moronicities (continued)
Message-ID: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>

http://python.org/doc/2.4.1/lib/module-re.html
http://python.org/doc/2.4.1/lib/node114.html

---------
QUOTE
The module defines several functions, constants, and an exception. Some
of the functions are simplified versions of the full featured methods
for compiled regular expressions. Most non-trivial applications always
use the compiled form
UNQUOTE


What does a programer who wants to use regex gets out from this piece
of motherfucking irrevalent drivel?

----------
QUOTE
compile(
pattern[, flags])

Compile a regular expression pattern into a regular expression  object,
which can be used for matching using its match() and  search() methods,
described below.

The expression's behaviour can be modified by specifying a  flags
value. Values can be any of the following variables,  combined using
bitwise OR (the | operator).
UNQUOTE


What exactly is it fucking saying?

I wanted to use regex to find & replace on text. I've read in a file.
Trying to reading this fucking doc is a pain in the ass. What are these
"flags"? Do i do

re.compile(r'mypat','M') or
re.compile(r'mypat',M)
or perhaps
re.compile(r'mypat',re.M)

The M isn't a fucking variable. Why does the doc incompetently use that
term?
And what the fuck is it unclearly meant by "OR" operator with the
mother fucking bitwise jargon?

All a person reading regex really wanted is to see how to use a string
pattern and replace it with another. The fucking doc cannot be possibly
fucking worsely written.

Fuck the mother fucking coders in the IT industry.

So, is
re.compile(r'mypat','M')
re.compile(r'mypat','MULTILINE')
equivalent?

and, by that fucking bitwise shit is it meant to say like
re.compile(r'mypat','M'|'U')
?

why cannot this piece of shit writing give a single example of usage?
and motherfucking confusedly organized, with fucking variable terms the
writer don't fucking understand, and meanwhile always trying to sound
big asshole and don't stop at masturbation by mention a regex book and
not hesitate to mention another language Perl. Fucking morons.

for a exposition of IT's fucking stupid docs and their fuckhead coders,
see:
http://xahlee.org/Periodic_dosage_dir/t2/xlali_skami_cukta.html

a cleaned up account of this post will be appended to the above
exposition.

--------

One final piece of advice here to sober up the fuckheads who are
currently offended and defiant: you want to ask yourself this question:
Can a seasoned programer, who is expert at least 2 languages, who is
also a expert at Perl and knew regex well, and who has also read the
official Python tutorial and has written at least 10 simple python
programs over a span of a month, can such a person, who have not yet
used regex in Python but now wants to use regex in Python and have just
read the doc, must he, resort to many trial and error to see exactly
what the doc is talking about?

But, can this doc be (re-)written effectively and easily so that any
programers needn't do trial'n'error post-reading?

The answer to the questions are resounding yeses, you fucking asses.

paypal me a hundred dollars and i'll rewrite the whole re doc in a few
hours.

Fuck you the standard IT morons. Excuse me for i didn't have time to
write a more coherent and detailed analysis of the stupidities of the
re doc.

 Xah
 xah at xahlee.org
? http://xahlee.org/PageTwo_dir/more.html ?



From gabriel.cooper at mediapulse.com  Tue Apr 12 17:03:41 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Tue, 12 Apr 2005 17:03:41 -0400
Subject: Better access to database search results
In-Reply-To: <8c7f10c60504120851224736e2@mail.gmail.com>
References: <425BEA2A.6020302@mediapulse.com>
	<8c7f10c60504120851224736e2@mail.gmail.com>
Message-ID: <425C37AD.1040102@mediapulse.com>



Simon Brunning wrote:

>On Apr 12, 2005 4:32 PM, Gabriel Cooper <gabriel.cooper at mediapulse.com> wrote:
>  
>
>>Usually when I access db search results it's something like this:
>>
>>cursor.execute("select A1,A2,A3,A4 from B where C")
>>for (a1,a2,a3,a4) in cursor.fetchall():
>>    stuff()
>>
>>But sometimes the point at which I use the data returned is not with the
>>search, and so having the ability to access the results as a dictionary
>>is more useful.
>>
>>Let me know what you think. Could this be done simpler?
>><snip>
>>    
>>
>
>Have you come across dtuple?
>(<http://www.lyra.org/greg/python/dtuple.py>). It's really easy to use
>- <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81252>.
>  
>
Hm. that's interesting, it's pretty much the same idea, only I do all 
the processing up front and return a complete variable that's generally 
indistinguishable from a list of dictionaries. This method (at least in 
the ASPN example) appears to prefer that you process each record as you 
come to it (which is undoubtedly more scalable). For my purposes, where 
as little programming logic as possible is required in the "view" 
section of code, I'm willing to accept the idea that I won't be using my 
function on immense amounts of data.

To explain, I develop websites using Snakeskin 
(http://snakeskin-tools.sf.net/). It separates design and logic by first 
processing a python object with specific event triggers and then loads 
the requested template to accompany it. The python object does the 
logic, the template does the display. e.g.


def page_process(self, ctx):
    c = ctx.request.db.cursor()
    c.execute("select a,b,c ....")
    ctx.locals.some_var = c.fetchall() # anything in ctx.locals is 
available as a var in the template


then in the template:

<html>
<body>
...
<ss-for expr="some_var" iter="i" expand="record">
    Print out A: <ss-value expr="record.a"/>
    Print out B: <ss-value expr="record['b']"/>
    ...
</ss-for>
...
</body>
</html>





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From jzgoda at gazeta.usun.pl  Thu Apr  7 16:03:19 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Thu, 07 Apr 2005 22:03:19 +0200
Subject: Distributing Python Apps and MySQL
In-Reply-To: <d341ij$lud$1@solaris.cc.vt.edu>
References: <1112887332.324949.318960@z14g2000cwz.googlegroups.com>
	<d341ij$lud$1@solaris.cc.vt.edu>
Message-ID: <d343us$d54$1@nemesis.news.tpi.pl>

rbt napisa?(a):

> I don't think one can distribute mysql within a software package w/o 
> buying a commercial license to do so. Check out their licensing on their 
> website here:
> 
> "When your application is not licensed under either the GPL-compatible 
> Free Software License as defined by the Free Software Foundation or 
> approved by OSI, and you intend to or you may distribute MySQL software, 
> you must first obtain a commercial license to the MySQL product."
> 
> http://www.mysql.com/company/legal/licensing/commercial-license.html

Don't see any legal problem here, if package is on GPL-compatible or 
OSI-approved license.

Anyway, if you want this "installer" to be multiplatform, I think you 
should write one. There are many good installer software packages for 
Windows (chief among free ones are Inno Setup and NSInstall), but I know 
only one for linux platform -- the one that XFCE uses and I don't know 
its internals, so I will speak only for Inno Setup for Windows.

It's really comprehensive tool set, as you can perform many tasks during 
installation -- you can install subpackages, perform pre- and 
post-installation steps and automate many tasks, providing they can be 
scripted. See http://www.jrsoftware.org/isinfo.php and read 
documentation, it's definitely worth this.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr  3 07:07:20 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 03 Apr 2005 13:07:20 +0200
Subject: Help with splitting
In-Reply-To: <1112493381.965950.89130@o13g2000cwo.googlegroups.com>
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
	<pan.2005.04.01.22.37.16.957649@jerf.org>
	<1112493381.965950.89130@o13g2000cwo.googlegroups.com>
Message-ID: <3ba128F6bbqolU1@individual.net>

George Sakkis wrote:

> If you don't want any null strings at the beginning or the end, an
> equivalent regexp is:
> 
>>>> whitespaceSplitter_2 = re.compile("\w+|\s+")
>>>> whitespaceSplitter_2.findall("1 2  3   \t\n5")
> ['1', ' ', '2', '  ', '3', '   \t\n', '5']
>>>> whitespaceSplitter_2.findall(" 1 2  3   \t\n5 ")
> [' ', '1', ' ', '2', '  ', '3', '   \t\n', '5', ' ']

Perhaps you may want to use "\s+|\S+" if you have non-alphanumeric
characters in the string.

Reinhold


From grig.gheorghiu at gmail.com  Wed Apr  6 13:03:33 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 6 Apr 2005 10:03:33 -0700
Subject: Establishing connection SSH
In-Reply-To: <1112779780.058547.270960@o13g2000cwo.googlegroups.com>
References: <1112779780.058547.270960@o13g2000cwo.googlegroups.com>
Message-ID: <1112807013.726577.323060@o13g2000cwo.googlegroups.com>

Try paramiko: http://www.lag.net/paramiko/

Grig



From miki.tebeka at zoran.com  Tue Apr 12 09:11:48 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 12 Apr 2005 16:11:48 +0300
Subject: Tkinter "withdraw" and "askstring" problem
Message-ID: <20050412131148.GT2960@zoran.com>

Hello All,

The following script "hangs" on win32 system:

    from Tkinter import *
    from tkSimpleDialog import askstring

    root = Tk()
    root.withdraw() # <<< Problem here
    askstring("Yap", "What's up?")

If I remove the problematic "withdraw" line the script works but there is
another Tk window at the back.

Any way to solve the problem?

Thanks.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From mahs at telcopartners.com  Thu Apr 14 18:25:58 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 14 Apr 2005 15:25:58 -0700
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <d3ml4c$crn$1@sea.gmane.org>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com><1113490437.037734.158740@g14g2000cwa.googlegroups.com>	<425EB9CA.1010708@transnorm.ch>
	<d3ml4c$crn$1@sea.gmane.org>
Message-ID: <d3mqev$te9$1@sea.gmane.org>

Fredrik Lundh wrote:
> Tiziano Bettio wrote:
> 
> 
>>could someone please tell me that this thread wasn't a aprilsfoll day
>>joke and it is for real...
>>
>>i'm pretty much able to go down to a single bit but what would be the
>>reverse algorithm as stated by martin...
> 
> 
> magic?
> 
> I suggest running my script on a couple of small text files.  when you've done that,
> see if you can figure out how the decompression algorithm works.
> 
> </F> 
> 

Tricky - especially checking the parity of the data bit, but I believe the 
following works:

def decompress(filename):
     m = '\x00\x00\x0fE\xc7\xc4'
     m = [(ord(i) & 0x7F) - (ord(i) & 0x80) for i in m]

     filename, data = open(filename, "rb").read(), filename[:-4]

     class Unfold(object):
         # Accumulator for partially unfolded data
         args = []

     try:
         unfold = Unfold()
         data  = "==".join([data,'\n'])
         compressed = [abs(data)]
         for fold in compressed:
             unfold.args.append(fold ** abs(fold))
     except TypeError, unfold:
         # No more unfolds
         pass

     decoder = __import__("".join(chr(ord(i)+j)
                 for i, j in zip(unfold.args[0], m))).decodestring
     return decoder(data)


Michael



From jerf at jerf.org  Fri Apr  8 12:07:30 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 08 Apr 2005 12:07:30 -0400
Subject: args attribute of Exception objects
References: <mailman.1526.1112952761.1799.python-list@python.org>
Message-ID: <pan.2005.04.08.16.07.30.85408@jerf.org>

On Fri, 08 Apr 2005 09:32:37 +0000, S?bastien de Menten wrote:

> Hi,
> 
> When I need to make sense of a python exception, I often need to parse the 
> string exception in order to retrieve the data.

What exactly are you doing with this info? (Every time I started to do
this, I found a better way. Perhaps one of them will apply for you.)

(As a general comment, I'd point out that you don't have to check the
entire error message; checking for a descriptive substring, while still
not "safe", is at least safe*r*.)


From mmrsva at gmail.com  Tue Apr 26 05:20:02 2005
From: mmrsva at gmail.com (Marcio Rosa da Silva)
Date: Tue, 26 Apr 2005 11:20:02 +0200
Subject: Order of elements in a dict
Message-ID: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>

Hi!

In dictionaries, unlinke lists, it doesn't matter the order one inserts 
the contents, elements are stored using its own rules.

Ex:

 >>> d = {3: 4, 1: 2}
 >>> d
{1: 2, 3: 4}

So, my question is: if I use keys() and values() it will give me the 
keys and values in the same order?

In other words, it is safe to do:

 >>> dd = dict(zip(d.values(),d.keys()))

to exchange keys and values on a dictionary? Or I can have the values 
and keys in a different order and end with something like this:

 >>> dd
{2: 3 , 4: 1}

instead of:

 >>> dd
{2: 1, 4: 3}

For this example it works as I wanted (the second output), but can I 
trust this?

Also, if someone has a better way to exchange keys and values in a dict, 
I would like to learn. :-)

Thanks!

Marcio


From fredrik at pythonware.com  Tue Apr  5 13:40:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 5 Apr 2005 19:40:54 +0200
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com><mailman.1279.1112602272.1799.python-list@python.org><11535p0mdgqde1@corp.supernews.com><mailman.1392.1112714523.1799.python-list@python.org>
	<1155et6khhpqu8c@corp.supernews.com>
Message-ID: <d2uiec$r5d$1@sea.gmane.org>

"lothar" wrote:

>a non-greedy match is implicitly defined in the documentation to be one such
> that there is no proper substring in the return which could also match the
> regex.

no, that's not what it says.  this is what is says:

    Adding "?" after the qualifier makes it perform the match in non-greedy
    or minimal fashion; as few characters as possible will be matched.

note that it says "qualifier" (that is, the preceeding *, +, or ? operator). it
doesn't say that the *entire* regex should be non-greedy.  it does not say
that search, findall, sub etc. should look for the shortest possible overall
match.  all it says is that the preceeding operator, and that operator only,
should look for the shortest possible match, rather than the longest.

> the module does not return a non-greedy match.

it does.  the problem is all in your head.

</F> 





From philippecmartin at sbcglobal.net  Thu Apr 14 14:57:34 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Thu, 14 Apr 2005 13:57:34 -0500
Subject: Using python from a browser
Message-ID: <200504141357.34646.philippecmartin@sbcglobal.net>

Hi,

I have a python script I wish to call from various browsers (IE; Mozilla, 
Firefox ..) on Windows & Linux.


I read that IE had the capability to embedd Python scripts, but what about the 
others ?

Regards,

Philippe



-- 
*************************************
Philippe C. Martin
SnakeCard, LLC
www.snakecard.com
+1 405 694 8098
*************************************


From fredrik at pythonware.com  Sat Apr  9 04:50:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 9 Apr 2005 10:50:19 +0200
Subject: Counting iterations
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com><4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
Message-ID: <d384qf$uk3$1@sea.gmane.org>

Derek Basch wrote:

> ooops you are right. Should have been:
>
> pets = ["cat", "dog", "bird"]
> num_pets = 0
> for i in pets:
>    num_pets += 1
>    print "pet" + "#" + num_pets

Traceback (most recent call last):
  File "example.py", line 5, in ?
    print "pet" + "#" + num_pets
TypeError: cannot concatenate 'str' and 'int' objects

</F> 





From hongqn at gmail.com  Sat Apr 16 04:20:34 2005
From: hongqn at gmail.com (Qiangning Hong)
Date: 16 Apr 2005 01:20:34 -0700
Subject: distutils question: different projects under same namespace
Message-ID: <1113639634.729450.191360@l41g2000cwc.googlegroups.com>

To avoid namespace confliction with other Python packages, I want all
my projects to be put into a specific namespace, e.g. 'hongqn' package,
so that I can use "from hongqn.proj1 import module1", "from
hongqn.proj2.subpack1 import module2", etc.

These projects are developed and maintained and distributed seperately,
so I should not make a whole 'hongqn' package with one setup.py.  I
must write setup.py scripts for each project.  I meet a problem here.

For instance, I am writing setup.py script for proj1. I use the
following parameters when calling distutils.core.setup:

setup(
    ...
    package_dir = {'hongqn.proj1': 'proj1'},
    packages = ['hongqn.proj1'],
    ...
)

"python setup.py install" will create /usr/lib/python2.3/hongqn/proj1
directory and copy proj1/*.py there.  But this is UNUSABLE!  There is
NO __init__.py file under /usr/lib/python2.3/hongqn/ so that import
hongqn.proj1 will fail!

I am considering manually create this __init__.py by hacking the
install_lib command.  But before making my hands dirty,  I want to know
if there is an "official" solution exists or others have already
success stories on this matter.

As a note, I wish the solution can handle setup.py bdist and
bdist_wininst well.



From mylastnameruntogether at mycompanyname.com  Mon Apr 11 13:31:29 2005
From: mylastnameruntogether at mycompanyname.com (Brandon J. Van Every)
Date: Mon, 11 Apr 2005 17:31:29 GMT
Subject: web authoring tools
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>
	<844k515hnt5h470jf50dd5r9sumn4q59qu@4ax.com>
Message-ID: <Xns96356B3F0670Avaneveryindiegamedes@207.69.189.191>

Ron_Adam <radam2_ at _tampabay.rr.com> wrote in 
>>
>>http://www.igda.org/seattle/
>>http://www.cyphondesign.com/
>>http://www.alphageeksinc.com/
>>http://www.gamasutra.com
> 
> These top three where done with text editors. If you view the source,
> you will notice the formatting has good consistent indenting and there
> isn't a lot of extra tags or other information needlessly inserted.
> 
> They make good use of CSS for formatting also.  If this is the type of
> thing you want, save the pages and study how they did it.  Use your
> own text and graphics of course.

Thanks for that insight.  It may not be the answer I exactly wanted to 
hear, but it does ring true with regards to my FrontPage 2000 experience.


-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

"The pioneer is the one with the arrows in his back."
                          - anonymous entrepreneur


From pythonch at nospam.not.com  Fri Apr 29 16:38:53 2005
From: pythonch at nospam.not.com (pythonchallenge)
Date: Fri, 29 Apr 2005 23:38:53 +0300
Subject: Python Challenge ahead [NEW] for riddle lovers
Message-ID: <d4u60o$akh$1@news2.netvision.net.il>

For the riddles' lovers among you, you are most invited to take part
in the Python Challenge, the first python programming riddle on the net.

You are invited to take part in it at:
http://www.pythonchallenge.com


From edcjones at comcast.net  Fri Apr  1 20:06:33 2005
From: edcjones at comcast.net (Edward C. Jones)
Date: Fri, 01 Apr 2005 20:06:33 -0500
Subject: Module subprocess: How to "communicate" more than once?
Message-ID: <1eOdnVIK972XbdDfRVn-og@comcast.com>

I have a program named "octave" (a Matlab clone). It runs in a terminal, 
types a prompt and waits for the user to type something. If I try

# Run octave.
oct = subprocess.Popen("octave", stdin=subprocess.PIPE)

# Run an octave called "startup".
oct.communicate("startup")

# Change directory inside octave.
oct.communicate("cd /home/path/to/my/dir")

I get:

Traceback (most recent call last):
   File "./popen.py", line 29, in ?
     oct.communicate("cd /home/path/to/my/dir")
   File "/usr/local/lib/python2.4/subprocess.py", line 1044, in communicate
     self.stdin.flush()
ValueError: I/O operation on closed file

How do I set up a subprocess so I can send it a command and get the 
answer, then send it another command and get an answer, etc.?


From rune.strand at gmail.com  Thu Apr 28 15:42:34 2005
From: rune.strand at gmail.com (runes)
Date: 28 Apr 2005 12:42:34 -0700
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
	<1114696780.653849.220080@o13g2000cwo.googlegroups.com>
	<1114698836.708809.32780@o13g2000cwo.googlegroups.com>
	<Xns9646A9319F208duncanbooth@127.0.0.1>
Message-ID: <1114717354.209028.30270@z14g2000cwz.googlegroups.com>

Hi Duncan, sorry, I was unprecise.  I'm thinking of a script, called
t.py  that can be used in the console  like an ordinary command. Som if
I change directory from S:\scripts to d:\projects and execute the
script  the title changes to "projects" etc.

I have that functionality today with a combination of a python script
and a batch file. I just wondered if I could use python all the way.
Apparently I cannot.

Here are the scripts:


------ DirInPath:\t.bat --------------------------------
@echo off
:: reads bare directory name from file
:: created by external Python script
set DIR_FILE_NAME=DOS_IS_TERRIBLE.tmp
PyBareDir.py %DIR_FILE_NAME%

for /F "eol=;" %%t in (%DIR_FILE_NAME%) do (
	title %%t
)

del /Q /F DOS_IS_TERRIBLE.tmp
------------------------------------------------------------


------ DirInPath:\PyBareDir.py --------------------------------
# extracts bare directory name and  writes
# it to file with name given as argument.

from os import getcwd
from os.path import basename
import sys

try:
	saveAsName = sys.argv[1]
	lastDir = basename(getcwd())
	XWwz(saveAsName, 'w+').write(lastDir + '\n;')
except:
	print "PyBareDir failed:", sys.exc_info()[1]

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



From sjmachin at lexicon.net  Mon Apr 18 17:49:58 2005
From: sjmachin at lexicon.net (John Machin)
Date: Tue, 19 Apr 2005 07:49:58 +1000
Subject: Behaviour of str.split
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
Message-ID: <24a8619qhstqjrfi6vdit27bo8r4afd5nf@4ax.com>

On Mon, 18 Apr 2005 16:16:00 +0100, Will McGugan
<news at NOwillmcguganSPAM.com> wrote:

>Hi,
>
>I'm curious about the behaviour of the str.split() when applied to empty 
>strings.
>
>"".split() returns an empty list, however..
>
>"".split("*") returns a list containing one empty string.
>
>I would have expected the second example to have also returned an empty 
>list. What am I missing?
>

You are missing a perusal of the documentation. Had you done so, you
would have noticed that the actual behaviour that you mentioned is
completely the reverse of what is in the documentation!

"""
Splitting an empty string with a specified separator returns an empty
list. 
If sep is not specified or is None, a different splitting algorithm is
applied. <snip> Splitting an empty string or a string consisting of
just whitespace will return "['']". 
"""

As you stumbled on this first, you may have the honour of submitting a
patch to the docs and getting your name on the roll of contributors.
Get in quickly, before X** L** does :-)

Cheers,

John


From kent37 at tds.net  Sat Apr 16 16:41:28 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 16 Apr 2005 16:41:28 -0400
Subject: pydoc preference for triple double over triple single quotes
 -- anyreason?
In-Reply-To: <mailman.2008.1113679688.1799.python-list@python.org>
References: <mailman.2008.1113679688.1799.python-list@python.org>
Message-ID: <42617449_3@newspeer2.tds.net>

Brian van den Broek wrote:
> Hi all,
> 
> I'm posting partly so my problem and solution might be more easily found 
> by google, and partly out of mere curiosity.
> 
> I've just spent a frustrating bit of time figuring out why pydoc didn't 
> extract a description from my module docstrings. Even though I had a 
> well formed docstring (one line, followed by a blank line, followed by 
> the rest of the docstring), when I ran Module docs, my modules showed up 
> as having "no description". ("Module docs" referring to the shortcut 
> installed on Windows that launches the pydoc server.)

?? It works for me with triple-single quoted strings...from a quick look it appears that pydoc uses 
inspect which looks at the __doc__ attribute; do your modules have __doc__ attributes?

Kent


From nick at craig-wood.com  Mon Apr 25 06:30:01 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 25 Apr 2005 10:30:01 GMT
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com>
	<1114211524.594547.227060@o13g2000cwo.googlegroups.com>
Message-ID: <slrnd6pg0j.uga.nick@irishsea.home.craig-wood.com>

has <has.temp2 at virgin.net> wrote:
>  licence, practice = noun
>  license, practise = verb

Tick

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


From kennywiggin at yahoo.com  Fri Apr 29 20:11:49 2005
From: kennywiggin at yahoo.com (kennywiggin)
Date: Sat, 30 Apr 2005 00:11:49 -0000
Subject: python and os.system() failure
Message-ID: <d4uig5+ch6q@eGroups.com>

Hi,

I'm actually not sure where the error is actually occurring, but the
effects are easily reproduced, but not reproducable. By not
reproducable, I mean the error does not occur exactly in the same
"spot" but it always happens.

I have my CD collection ripped to flac, so I have >4000 flacs. I wrote
this script that will automatically encode the flacs into mp3 or ogg
while transferring all the metaflac info over to id3 tag of the mp3.

Generally, the script works like this:

Get list of flac
for each flac file:
   Store metaflac_info in an information class
   os.system(decode flac using /usr/bin/flac)
   os.system(encode mp3 and embed info stored in class)

Now, this script will go on for some time but after 40-100 files the
decode will fail with /usr/bin/flac reporting an error in reading the
flac file.

.flac: ERROR while decoding data
state = FLAC__STREAM_DECODER_READ_FRAME

The script fails to decode any more flac files until the vm
crashes from having too many open files.

The flac file is perfectly fine, though. Restarting the script, the
flac file that "crashed" decodes/encodes just fine. Analysis by 'flac
-t' or 'flac -a' show a correct flac file. How ever, if I try to
decode a "bad" flac file in parallel with the script after the script
has "failed", I can't decode the flac and get the same error. Yet, I
can do 'flac -a' or 'flac -t' on the file and it reports 100% good in
parallel to the "dead" script.

It is not a disk space issue as I've checked. No stray tempfiles are
created since the command to create them fails when opening the flac
file.

I have tried invoking garbage collection after a set number of file
and sleeping the thread after running into the error, but neither
worked. The most likely culprit is my script, but it seems too simple
to "die" like that. I don't think it's a problem with the 'flac'
application. Another possible culprit is a python VM issue that I am
not aware of.

Any advice would be appreciated,

Kenny

Debian Linux, i686
Python 2.3 (2.3.5-2) and earlier versions of 2.3
flac 1.1.1 (1.1.1-5)





From mefjr75 at hotmail.com  Sun Apr 17 20:16:30 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 17 Apr 2005 17:16:30 -0700
Subject: Finding name of running script
In-Reply-To: <1113778866.595981.186480@f14g2000cwb.googlegroups.com>
References: <1113778866.595981.186480@f14g2000cwb.googlegroups.com>
Message-ID: <1113783390.440857.302680@l41g2000cwc.googlegroups.com>

> print locals()['__file__'].split(sep)[-1]
.split(sep)[-1] is pretty dense reading.
try:
print os.basename(locals()['__file__'])

runes wrote:
> Is it a more pythonic way of finding the name of the running script
> than these?
>
> from os import sep
> from sys import argv
>
> print argv[0].split(sep)[-1]
> # or
> print locals()['__file__'].split(sep)[-1]
> # or
> print globals()['__file__'].split(sep)[-1]

M.E.Farmer



From jepler at unpythonic.net  Tue Apr 19 20:32:06 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 19 Apr 2005 19:32:06 -0500
Subject: Writing to stdout and a log file
In-Reply-To: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
Message-ID: <20050420003203.GA26325@unpythonic.net>

This variation works:
#------------------------------------------------------------------------
class Tee:
    def __init__(self, *args):
        self.files = args

    def write(self, data):
        for f in self.files:
            result = f.write(data)
        return result

    def writelines(self, seq):
        for i in seq: self.write(i)

import sys
sys.stdout = Tee(sys.stdout, open("/tmp/stdout.log", "w"))

print 'STDOUT', sys.stdout
#------------------------------------------------------------------------

It appears that the 'print' statement always uses file.write if
isinstance(sys.stdout, file).  I don't know whether this has been
reported as a bug before, or if there's a reason for the current
behavior.  It may be an accidental behavior that is left over from the
days when builtin types were not subclassable.

Jeff
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From mlernerNO at SPAMumich.edu  Thu Apr  7 12:35:20 2005
From: mlernerNO at SPAMumich.edu (Michael George Lerner)
Date: Thu, 07 Apr 2005 16:35:20 GMT
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
	<SqJ4e.771$r6.203@news.itd.umich.edu>
	<mailman.1421.1112771646.1799.python-list@python.org>
Message-ID: <cjd5e.971$r6.240@news.itd.umich.edu>

Nicolay A. Vasiliev <nvasiliev at whiteriversoft.com> wrote:
> Hello!

> What do you think all about ActiveState Komodo?


Is this specifically to me?  I haven't tried it, but I'm tempted.
I've recently begun teaching my wife some Python in order to help
her write a useful GUI app, and that makes it look particularly
tempting.  I'm using BoaConstructor for the GUI stuff at the moment.
It has a bit of a learning curve, but it looks nice so far.

-michael

> Michael George Lerner wrote:

> >Aahz <aahz at pythoncraft.com> wrote:
> >
> >  
> >
> >>Use vim.  80% of the power of emacs at 20% of the learning curve.
> >>    
> >>
> >
> >A system administrator said this to me about unix a long time ago,
> >but it applies equally well to emacs:
> >
> >Emacs is a great place to live, but I'd hate to visit.
> >
> >-michael, an (x)emacs user
> >
> >  
> >




From john at castleamber.com  Mon Apr 25 15:33:54 2005
From: john at castleamber.com (John Bokma)
Date: 25 Apr 2005 19:33:54 GMT
Subject: Python or PHP?
References: <mailman.2419.1114383838.1799.python-list@python.org>
	<4ef0f3a4.0504242339.56b0506d@posting.google.com>
Message-ID: <Xns96439421AE239castleamber@130.133.1.4>

Alan Little wrote:

> Steve Holden <steve at holdenweb.com> wrote:
> 
>>Your statement then becomes
>>
>>select * from foo where bar=1; drop table foo
>>
>>which is clearly not such a good idea.
> 
> I'm sure Steve is very well aware of this and was just providing a
> simple and obvious example, nevertheless it might be worth pointing
> out that anyody who connects their web application to their database
> as a user that has DROP TABLE privileges, would clearly be in need of
> a lot more help on basic security concepts than just advice on
> choosing a programming language.

True. But how does it stop someone who uses inserts? (I exclude the case 
inserts are not needed).

> This goes back to the point somebody made earlier on in the thread -
> many web applications can be implemented as fairly simple wrappers
> around properly designed databases. "Properly designed" includes
> giving some thought to table ownership and privileges.

One should stop SQL injection always, no matter if the database takes care 
of it or not. There is no excuse (like, yeah, but I set up the privileges 
right) for allowing SQL injection, ever.

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


From http  Wed Apr 13 21:20:06 2005
From: http (Paul Rubin)
Date: 13 Apr 2005 18:20:06 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
Message-ID: <7x3btui27t.fsf@ruckus.brouhaha.com>

Dick Moores <rdm at rcblue.com> writes:
> I need to figure out how to compute pi to base 12, to as many digits
> as possible. I found this reference,
> <http://mathworld.wolfram.com/Base.html>, but I really don't
> understand it well enough. Could someone show me how to do what I need?

Using the GNU "bc" utility:

  $ bc -l
  bc 1.06
  Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
  This is free software with ABSOLUTELY NO WARRANTY.
  For details type `warranty'. 
  scale = 3000    # number of output places wanted
  obase = 12      # output base
  print 4 * a(1)  # pi = 4*arctan(1)
  3.184809493B918664573A6211BB151551A05729290A7809A492742140A60A55256A\
  0661A03753A3AA54805646880181A3683083272BBBA0A370B12265529A828903B4B2\
  56B8403759A71626B8A54687621849B849A8225616B442796A31737B229B23914898\
  53943B8763725616447236B027A421AA17A38B52A18A838B01514A51144A23315A30\
  09A8906B61B8B48A62253A88A50A43BA0944572315933664476B3AABB77583975120\
  683526B75B462060BB03B432551913772729A2147553531793848A0402B999B50585\
  35374465A68806716644039539A8431935198527B9399B112990ABB0383B10764542\
  4577A51601B3624A88B7A676A3992912121A213887B92873946A61332242217AA735\
  4115357744939112602BA4B888818A3269222B528487747839994AB223B65B876269\
  5422822669BA00A586097842A51750362073B5A768363B21BB1A97A4A19444774939\
  9804922175A068A46739461990A2065BB0A30BBAB7024A585B1A84428195489784A0\
  7A331A7B0A1574565B373B05B03A5A80A13AB87857734679985558A5373178A7B282\
  71992A3894A5776085083B9B238B2220542462888641A2BAB8B3083AB49659172A31\
  2B78518654494A068662586A181835A64440B2970A12281397589881536720890580\
  1032881449223841428763329617531239B9A657405584014534390B587625606BB8\
  0923795944B43757A431B039556282978A6A49590553490BA1844947175637A90824\
  7B50127722464441380A852B0847B5813019BB70A67663B426565434069884476132\
  193344BA55A2128A03838974606B851B2979321A408067225A5AA4B3464A1A174735\
  95333909AB9127079655B3164B68B9B28A9B818A220A025AB0934203995B7A62A7AA\
  739355340539BA3182905B193905603A43B660B9426A92294697144A896A5B233935\
  8BB2B7294BB89635B071A6351211360B820B1882AB8433B54757B87A373284B1BA18\
  2A10326476B369A4A6365B58B8018994BB152556765475A704BB94B6B2A39458971A\
  8B90512786B5029404818644323552916170B3ABB7363496427B088B68725A685700\
  40617949289077B278069A09B559324B8A66828B40549B0296065B2300330592569A\
  7B76B92BA1293585B6A9B604567A0901362856373B4B56897946256B4172B1B50474\
  351364749A33996A81BA8847347A8411B850B79A03018291672AA0945656A159AA6A\
  A0A845531A592005B8A34366B882257107B190969A846474836A9800750778920BA7\
  97297A2791101B0685A86BB704B9BAA17B055293679843B35215B0A8B1182B611953\
  B080AA5431B219907A8448A81B1A9493245676B88013B47033524085959415862101\
  4216619553246570601967448B470174B9244892444817453865A4003B5AA7176451\
  AAB90681A949786154AA040477382BA69371041710B8728458A23979252B25423675\
  3A44A1900AA283536A227648812525743868B410A567794663359A6726A528678332\
  8135114789B7645505B047848020A730A9557B206776AA56A19682744107901306B2\
  9008808619866B4911A05264B872A46B5376383932699531B449195640B62A636228\
  30886247A47B3957169861239358041AA281333622AA15912B0A636047A489BB0726\
  282A78B96671B27305A9652496B9B999011A7BA36898891665B1A6009058978850A2\
  1B01A158A1473B84A192B8672542A2A7056581995207A436A5B3BA2824637A3112AB\
  B57176468206A071200A327B3216425148100786502AA21236ABB35499277670A126\
  9730583403B1922A483856007301983989159BB688A58B602339806B63002A339A50\
  B0BA533B84827793913081070A32595A101803A9A20234691B1A0B623274B69B0B44\
  688195169461059543A252BB05208720BA13118266A872B26B9B584959B44B
  quit
  $ 

The arctan calculation takes about 20 sec on an Athlon of around 2 ghz.


From removethis.kartic.krishnamurthy at gmail.com  Mon Apr 25 19:00:05 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Mon, 25 Apr 2005 23:00:05 GMT
Subject: web based file manager in python
In-Reply-To: <mailman.2477.1114448699.1799.python-list@python.org>
References: <mailman.2477.1114448699.1799.python-list@python.org>
Message-ID: <VDebe.629$6z3.616@newssvr33.news.prodigy.com>

"The Great 'Ksenia Marasanova' uttered these words" on 4/25/2005 1:04 PM:
> Hi,
> 
> I didn't suceed in finding any kind of standard web based file
> manager, written in Python. There are quite a lot for PHP (the nicest


> Any hints? 
> 
> Thanks!

Ksenia - I recently came across this python web-based FM:

http://snakelets.sourceforge.net/filemgr/index.html

It is by Irmen De Jong, the author of Snakelets.

Thanks,
-Kartic


From skip at pobox.com  Thu Apr 28 10:07:54 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 28 Apr 2005 09:07:54 -0500
Subject: regex over files
In-Reply-To: <427071cc.101435286@news.oz.net>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
	<426EAA9D.2050904@jessikat.fsnet.co.uk>
	<pan.2005.04.26.21.39.15.988504@jerf.org>
	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<mailman.2611.1114656019.1799.python-list@python.org>
	<427071cc.101435286@news.oz.net>
Message-ID: <17008.60986.932705.506233@montanaro.dyndns.org>


    Bengt> To be fairer, I think you'd want to hoist the re compilation out
    Bengt> of the loop.

The re module compiles and caches regular expressions, so I doubt it would
affect the runtime of either version.

    Bengt> But also to be fairer, maybe include the overhead of splitting
    Bengt> correctly, at least for the simple case regex in my example -- or
    Bengt> is a you-goofed post for me in the usenet forwarding queues
    Bengt> somewhere still? ;-)

I was just too lazy to incorporate (something like) your change.  You will
note that I was also lazy enough to simply steal your XXXXX file. <wink>

Skip


From ods at strana.ru  Thu Apr 21 11:03:47 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 21 Apr 2005 19:03:47 +0400
Subject: deprecation of has_key?
In-Reply-To: <TIKdnV6iPosyIPrfRVn-2w@comcast.com>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>
	<426775C8.3000303@holdenweb.com>
	<mailman.2224.1114094137.1799.python-list@python.org>
	<TIKdnV6iPosyIPrfRVn-2w@comcast.com>
Message-ID: <20050421190347.1d1f2ab4.ods@strana.ru>

On Thu, 21 Apr 2005 08:50:25 -0600 Steven Bethard wrote:

SB> Huh?  I'm not following your logic.  Why is "item in dict" less
SB> readable than "dict.has_key(item)"?  Something to do with expecting
SB> inverses that don't exist?
SB> 
SB> Personally, I use "item in dict" because it's quite readable to me,
SB> and generally faster.

For me dictionary is a collection of key-value pairs, but not a
collection of keys (that's what set is).

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From ajw140NO at SPAMyork.ac.uk  Mon Apr 18 17:40:27 2005
From: ajw140NO at SPAMyork.ac.uk (Andrew Wilkinson)
Date: Mon, 18 Apr 2005 22:40:27 +0100
Subject: Wrapping C++ Class Heirachy in Python
Message-ID: <d419gb$r67$1@pump1.york.ac.uk>

Hi,

I'm trying to wrap a C++ class hierarchy with Python types and I'd like to
maintain the hierarchy in the types. I'm fairly sure this is possible,
isn't it?

Are there any documents explaining how to do this, the standard Python
manual doesn't go into enough detail about creating types for this.

I've found the tp_base and tp_bases elements and I've set them to the base
type object (and a tuple containing the base type object) before I call
PyType_Ready but in Python the base class isn't recognised. Is there
anything obvious I'm missing?

Thanks in advance for any help,
Andrew Wilkinson



From rockon02 at senet.com.au  Sat Apr 30 21:25:37 2005
From: rockon02 at senet.com.au (Mike brown)
Date: Sun, 01 May 2005 11:25:37 +1000
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
	<LXsce.2698$zu.1067@newssvr13.news.prodigy.com>
	<OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
	<1114831490.664193.236140@l41g2000cwc.googlegroups.com>
	<eJOor1ZTFHA.228@TK2MSFTNGP10.phx.gbl>
Message-ID: <rockon02-0105051125370001@1cust136.tnt5.adl1.da.uu.net>

Just go away from RMMGA


From sjmachin at lexicon.net  Wed Apr  6 21:26:32 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 07 Apr 2005 11:26:32 +1000
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
	<1112835544.302702.294570@z14g2000cwz.googlegroups.com>
Message-ID: <sb2951dj13v41qkgg4kl4gj78hcalkga4f@4ax.com>

On 6 Apr 2005 17:59:04 -0700, "Jordan Rastrick"
<jrastrick at student.usyd.edu.au> wrote:

>Unless I'm mistaken, this doesnt quite work, because it switches the
>parity of phase every time a comparison is made, rather than every time
>a swap is made. So:
>
># <untested>
>phase = 1
>def mycmp(x,y):
>   global phase
>   c = cmp(x,y)
>   if c > 0: # i.e. a swap will be performed in the sort

That's rather a wild assumption. It's not part of the language
definition that the first argument is at a lower index in the list
than the second argument. Perhaps it's been coded as though: c =
cmp(y, x); if c < 0: swap()

In any case I doubt if the OP's Data Structures & Algorithms 101 tutor
is interested in anything so practical as the implementation of
Python's list.sort() method :-)


>       phase = -phase
>   return c



From a.r.ferreira at gmail.com  Tue Apr 19 15:07:44 2005
From: a.r.ferreira at gmail.com (Adriano Ferreira)
Date: Tue, 19 Apr 2005 16:07:44 -0300
Subject: Why does python class have not private methods? Will this never
	changed?
In-Reply-To: <311b5ce105041902165a0969a0@mail.gmail.com>
References: <311b5ce105041902165a0969a0@mail.gmail.com>
Message-ID: <73ddeb6c05041912072f335677@mail.gmail.com>

>but why does it hava not private methods?
Because it does not need them, ain't it?

>Private stuff always makes programming much easier.
Does it? Sometimes contortion is needed to get rid of declarations
that restrain access, for example, when writing tests.

I think the point-of-view of Python is very akin to many others in
communities related to dynamic languages. Privacy is most convention.
If sometimes you decide to look under the hood, you are not forbidden
to, but you are on your own.

Two quotes that make sense in this issue:

(from "perlmodlib"): It [the programming language] would prefer that
you stayed out of its living room because you weren't invited, not
because it has a shotgun.

(from Roberto Ierusalimschy, Lua's designer): If you don't want to do
something, just don't.

I think it is a cultural thing. Python has no "real" private methods
and fields, because it did not grow worried about that. And that
doesn't stop programmers from being productive.

Regards,
Adriano.


From grante at visi.com  Wed Apr 13 13:50:10 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 13 Apr 2005 17:50:10 -0000
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
	<425d3b01$1@nntp0.pdx.net>
	<1113412899.536885.285890@g14g2000cwa.googlegroups.com>
Message-ID: <115qmuin44mnie0@corp.supernews.com>

On 2005-04-13, Dan Bishop <danb_83 at yahoo.com> wrote:

> Pi has an interesting representation in bases between 0 and 1,
> exclusive.  There are a finite number of digits after the radix point,
> but an infinite number _before_ it.

You really oughtn't make me think so hard right after lunch.

-- 
Grant Edwards                   grante             Yow!  I'd like some JUNK
                                  at               FOOD... and then I want to
                               visi.com            be ALONE --


From steve at ferg.org  Mon Apr 18 23:01:52 2005
From: steve at ferg.org (Steve)
Date: 18 Apr 2005 20:01:52 -0700
Subject: Proposal: an unchanging URL for Python documentation
Message-ID: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>

posted on: comp.lang.python
emailed to: docs at python.org

I have a suggestion/request that will, I think, improve the Python
documentation.

Currently, the Python documentation in HTML format is stored at URLs
that change with each new release of Python.  That is, for example, the
documentation for the os module is at
http://python.org/doc/2.3/lib/module-os.html for release 2.3 of Python,
at http://python.org/doc/2.4/lib/module-os.html for release 2.4 and so
on.

I propose that an additional a URL be set up for the Python HTML
documentation.  This URL will always contain the current version of the
documentation.  Suppose we call it "current".  Then (while 2.4 is still
the current version)  the documentation for the os module would also be
available at
http://python.org/doc/current/lib/module-os.html.

There are three advantages to this proposal.

(1) It is cheap and easy to do.

(2) If a person regularly refers to the documentation for the os
module, he can bookmark
http://python.org/doc/current/lib/module-os.html and always be sure of
getting the most current version.

(3) This would give Pythonistas -- basically as a freebie --
annotatable documentation.  You may be familiar with Wikalong (
http://www.wikalong.org/ ).  Wikalong basically allows you to annotate
any URL.  If we had a "current" URL for Python documentation, people
could add Wikalong notes to the current documentation without worrying
that the annotations would not survive the release of the next version
of Python.  Being able to use Wikalong would provide the Python
community with the opportunity to experiment with annotatable documents
(not to mention,  ride the leading edge of the Wikalong wave).  And
those who dislike annotated documentation can easily ignore it or turn
it off the Wikalong sidebar (assuming that they have Wikalong installed
in the first place).

-- Steve Ferg



From mefjr75 at hotmail.com  Sat Apr 30 13:12:27 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 30 Apr 2005 10:12:27 -0700
Subject: Micro-PEP: str.translate(None) to mean identity translation
In-Reply-To: <42732ed7.280902606@news.oz.net>
References: <4272e00c.260731842@news.oz.net>
	<1114835238.762478.236940@o13g2000cwo.googlegroups.com>
	<42732ed7.280902606@news.oz.net>
Message-ID: <1114881147.510389.129570@o13g2000cwo.googlegroups.com>

After I re-read your post in daylight and read your followup the "Aha!"
 hit me .I am a little slow at times. I have always just iterated thru
the badchars and replaced with  "" . What you suggest would be very
nice indeed!
Thanks for the time and explanation, and you too Peter !

For what it is worth +1 ;)

On another note why is maketrans in the string module....
I was a bit lost finding it the first time should it be builtin?
transtable = "abcdefg".maketrans("qwertyu")
Probably missing something.
M.E.Farmer



From fuzzyman at gmail.com  Wed Apr  6 03:14:43 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Apr 2005 00:14:43 -0700
Subject: Python Google Server
In-Reply-To: <mailman.1396.1112720427.1799.python-list@python.org>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<mailman.1375.1112701816.1799.python-list@python.org>
	<1112706994.922193.5610@z14g2000cwz.googlegroups.com>
	<mailman.1389.1112713620.1799.python-list@python.org>
	<1112714083.674249.44370@g14g2000cwa.googlegroups.com>
	<mailman.1396.1112720427.1799.python-list@python.org>
Message-ID: <1112771683.431054.82930@l41g2000cwc.googlegroups.com>


vegetax wrote:
> Fuzzyman wrote:
>
> > Of course - sorry. Thanks for the fix. Out of interest - why are
you
> > using this... just for curiosity, or is it helpful ?
>
> because is fun to surf on the google cache, =)

Ha - cool ! The bizarre thing is, that for me it's actually useful. I
doubt anyone else will be in the same situation though.

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From eurleif at ecritters.biz  Sat Apr 23 19:13:20 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 23 Apr 2005 23:13:20 GMT
Subject: Python or PHP?
In-Reply-To: <Xns9641B65EDB2Ccastleamber@130.133.1.4>
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
	<Xns9641B65EDB2Ccastleamber@130.133.1.4>
Message-ID: <kEAae.2308$5I5.223369@newshog.newsread.com>

John Bokma wrote:
> my $sort = $cgi->param( "sort" );
> my $query = "SELECT * FROM table WHERE id=? ORDER BY $sort";

And the equivalent Python code:


cursor.execute('SELECT * FROM table WHERE id=%%s ORDER BY %s' % sort, 
[some_id])

You're right, of course, about being *able* to write code with SQL 
injection vulnerabilities in Python. But it's not even close to being as 
easy as in PHP.


From bokr at oz.net  Fri Apr  1 17:21:33 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 01 Apr 2005 22:21:33 GMT
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <kLg3e.203$7b.56@trndny02>
Message-ID: <424dc33c.55623752@news.oz.net>

On Fri, 01 Apr 2005 18:52:00 GMT, "Raymond Hettinger" <vze4rx4y at verizon.net> wrote:

>[Ville Vainio]
>> I need a dict (well, it would be optimal anyway) class that stores the
>> keys as strings without coercing the case to upper or lower, but still
>> provides fast lookup (i.e. uses hash table).
>
>
>>>> class S(str):
>    def __hash__(self):
>        return hash(self.lower())
>    def __eq__(self, other):
>        return self.lower() == other.lower()
>
>
>>>> d = {}
>>>> d[S('ThE')] = 'quick'
>>>> d[S('the')]
>'quick'
>>>> d
>{'ThE': 'quick'}
>
Building on your S to sneak in a generalized idea ;-)

 >>> class idict(dict):
 ...     def __setitem__(self, key, value):
 ...         dict.__setitem__(self, S(key), value)
 ...     def __getitem__(self, key):
 ...         return dict.__getitem__(self, S(key))
 ...
 >>> d = idict()
 >>> d['ThE'] = 'quick'
 >>> d['the']
 'quick'
 >>> d
 {'ThE': 'quick'}

Ok, the idea:
I wonder if a dict with a general override hook for hashing all keys would be useful.
E.g.,  a dict.__keyhash__ that would take key as arg and default as now returning key.__hash__()
but that you could override. Seems like this could potentially be more efficient than key wrappers,
and would also make it so you wouldn't have to chase all the affected methods in doing an idict
like the above (e.g., get, setdefault, update etc. etc.)

Regards,
Bengt Richter


From prabapython at yahoo.co.in  Wed Apr 13 01:49:46 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Wed, 13 Apr 2005 06:49:46 +0100 (BST)
Subject: Doubt regarding sorting of a list specific field
In-Reply-To: 6667
Message-ID: <20050413054946.99185.qmail@web8409.mail.in.yahoo.com>

Dear All,

    I have doubt regarding sorting. I have a list
that list have another list (eg)

list = [[1234,'name1'],[2234,'name2'],[0432,'name3']]

I want to sort only numeric value having array field.
How I need to do for that. 

with regards
Prabahar






________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From kent37 at tds.net  Tue Apr 26 06:03:46 2005
From: kent37 at tds.net (Kent Johnson)
Date: Tue, 26 Apr 2005 06:03:46 -0400
Subject: Do I need a nested lambda to do this?
In-Reply-To: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>
References: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>
Message-ID: <426e0dac_2@newspeer2.tds.net>

raoul wrote:
> I can't figure this one out. Trying to be unnecessarily functional I
> suspect.
> 
> I have the following lists.
> 
> vals = [1.000,2.344,4.2342]
> tab = [((0,1),(0,3),(0,4)),
>        ((2,2),(3,0),(3,9)),
>        ((3,4),(6,3),(7,1))]
> 
> I'm trying to create a one liner using map/reduce/lambda/zip(* etc to
> do replace the first element of each pair in each row by the the values
> in vals as follows:
> 
> tab = [((1.000,1),(1.000,3),(1.000,4)),
>        ((2.344,2),(2.344,0),(2.344,9)),
>        ((4.2342,4),(4.2342,3),(4.2342,1))]

I don't know about map/etc but it's pretty easy using list comp and gen exp:
print [ tuple( (val, t[1]) for t in tt ) for val, tt in zip(vals, tab) ]

Kent


From radam2 at tampabay.rr.com  Tue Apr 19 18:40:54 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Tue, 19 Apr 2005 22:40:54 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
In-Reply-To: <1113800859.317109.27720@f14g2000cwb.googlegroups.com>
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<CoOdnZbRee_Mg_7fRVn-rQ@comcast.com>
	<1113800859.317109.27720@f14g2000cwb.googlegroups.com>
Message-ID: <WNf9e.8539$_t3.4915@tornado.tampabay.rr.com>

Kay Schluehr wrote:
> Steven Bethard wrote:
> 
> 
>>So the object of a "where" is then always an ordered dict?
> 
> 
> Yes.
> 
> 
>>If so, then
>>I guess I like this proposal best so far.
>>
>>However, it does seem to have the problem that you can't have any
>>additional local variables so, for example, list comprehensions are
>>probably not usable...
>>
>>Or can you still drop the argument to "where" and just use the names
>>directly?  E.g.:
>>
>>x = property(fget=fget, doc=doc) where:
>>     doc = "I'm the 'x' property."
>>     def fget(self):
>>         return self.__x
> 
> 
> I can't see why this shouldn't work?
> 
> The specifiers behind "where" are present to determine the matching
> behaviour. The order of a dict is caused by different specifiers i.e. a
> dict- or tuple-like specifier. If a specifier is not present only names
> can be matched regardless of a sequence and this is always possible
> because we still have a dict with names as keys.
> 
> What should not be possible are statements like this:
> 
>  x = property(a, b) where:
>       doc = "I'm the 'x' property."
>       def fget(self):
>           return self.__x
> 
> because there is no rule to match doc and fget onto a and b. In this
> case we would need specifiers:
> 
>  x = property(a, b)
>      where **a:
>         doc = "I'm the 'x' property."
>      where **b:
>         def fget(self):
>             return self.__x
> 
> Ciao,
> Kay


Just throwing in another slight variation to Kay's example here.

How about using ***name in the same way as *name, and **name are used? 
It extends the current argument options in a consistent manner and 'I 
believe' is easy to explain and visually says something different is 
happening here.

This builds on the already present arg, *arg, **arg,  and so why not a 
***arg to represent the 4th alternative, a suite?

You would also need to use it in the def statement as well, and probably 
would want to anyway if your argument suite is that long.

def property(***a, ***b):
     a:
         doc = "I'm the default 'x' property."
     b:
         def foo(arg):
		return arg
     return arg


x = property(***a, ***b)
     a:
          doc = "I'm the 'x' property."
     b:
          def fget(self):
              return self.__x


With the ***name syntax, making it's obvious it's different (a good 
thing), and you might be able to drop the 'with' or 'where'.

The (***name) == (name: suite) relationship may be useful in other 
places as well.

I'm not sure on the returns for the def above, just trying to make it 
more complete.  I presuming foo would be the default if 'b' isn't given 
in the function call. I suppose the ***b, and b: suite, in the function 
call can be optional.  Same for the ***a and a: suite.  By having them 
named, either one could be absent and the order could be swapped in the 
call if it makes it more readable.

Cheers,
Ron_Adam


From pballard at ozemail.com.au  Mon Apr  4 04:39:48 2005
From: pballard at ozemail.com.au (Peter Ballard)
Date: 4 Apr 2005 01:39:48 -0700
Subject: DIY Spam Filter in Python
Message-ID: <9d5509fa.0504040039.526c93b6@posting.google.com>

Hi all,

I've no idea if this will be of any use to anyone. But since I've gone
to the effort of writing it, I might as well make it publicly
available...

Until last year, spam filtering was a source of frustration for me.
Freeware packages I tried (specifically, spamassassin and dspam) were
difficult to use. Custom rules using procmail were a pain.

Then I noticed that python came with email parsing capabilities in the
email module. So I thought that maybe custom rules in python would be
easier than (a) custom rules in procmail, or (b) deciphering the
documentation of a package. And a lot more fun.

It turned out to be very easy. I got the filter up in a few evenings,
and I've been using it successfully, and slowly enhancing it, over a
number of months.

In short: a success story for "using the batteries" - at least in my
opinion.

Source code, and a bit of documentation, is at:
http://members.ozemail.com.au/~pballard/diyspamfilter.html

--
Regards,

Peter Ballard
Adelaide, AUSTRALIA
http://members.ozemail.com.au/~pballard/


From nsgraham at ece.ualberta.ca  Thu Apr 14 00:47:56 2005
From: nsgraham at ece.ualberta.ca (Nicholas Graham)
Date: Wed, 13 Apr 2005 22:47:56 -0600
Subject: String manipulation
Message-ID: <Pine.LNX.4.44.0504132237250.11173-100000@feynman.ece.ualberta.ca>


I'm writing a program that requires some string manipulations.  Let's say 
I have a string

s='x'

Now, the ascii code for 'x' is 0x78.  I want to be able to perform 
operations on this number, and print the character corresponding to the 
results of the operation.  For example, the pseudo-code looks like:

-read in string s from external file (for simplicity, we'll keep s='x')

-determine the code for s (should be 0x78 or 120 in base 10), store it in 
variable c

-add a literal to c (let's say c=c+1)

-find out which character corresponds to the new code c=0x79

-store the character in a new string s2

At the end of this, I want s2='y'

Any suggestions?

NG



From ritterhaus at yahoo.com  Wed Apr  6 15:27:29 2005
From: ritterhaus at yahoo.com (ritterhaus at yahoo.com)
Date: 6 Apr 2005 12:27:29 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <1112815288.465004.74840@z14g2000cwz.googlegroups.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<1112815288.465004.74840@z14g2000cwz.googlegroups.com>
Message-ID: <1112815649.741176.233850@l41g2000cwc.googlegroups.com>

This is running in the interactive 'PyShell', but in truth those print
statements are part of a gui app that flashes a control in wx.widgets
by toggling it's background color. The same behavior either way.



From bokr at oz.net  Sat Apr 16 03:14:50 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 16 Apr 2005 07:14:50 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<mailman.1993.1113618726.1799.python-list@python.org>
Message-ID: <4260b4e3.65280488@news.oz.net>

On Fri, 15 Apr 2005 19:32:02 -0700, James Stroud <jstroud at mbi.ucla.edu> wrote:

>I_vote_yes(James):
>   I_understand_what_it_does = True
>   Makes_code_formatting_way_more_managable_in_tough_cases = True
>   Makes_code_way_more_readable = True
>   To_cool = True
>
>On Friday 15 April 2005 04:45 pm, Brian Sabbey wrote:
>> Here is a pre-PEP for what I call "suite-based keyword arguments". The
>> mechanism described here is intended to act as a complement to thunks.
>> Please let me know what you think.
>>
Kind of cool. If we had full lambdas aka as anonymous defs (def foo(...) with foo left out ;-)
would this be concise sugar for the equivalents shown below your examples?

(The rule for parsing the suite of an anonymous def is that the left column of the first non-space
character of the first suite statement following the def(): becomes the suite indent reference,
and a dedent to the left of that ends the def(): or a closing bracket not opened in the def(): suite
also ends it. Otherwise it is standard suite indentation)

>> Suite-Based Keyword Arguments
>> -----------------------------
>>
>> Passing complicated arguments to functions is currently awkward in Python.
>> For example, the typical way to define a class property winds up polluting
>> the class's namespace with the property's get/set methods.  By allowing
>> keyword arguments to be defined in a suite following a function call,
>> complicated arguments can be passed in a cleaner, easier way.
>>
>> Examples
>> ========
>>
>> Using suite-based keyword arguments, the code
>>
>> f(x = 1)
>>
>> is equivalent to
>>
>> f():
>>     x = 1

   f(**def():
         x = 1
         return vars())
       
>>
>> In general, a suite following a function call creates a new scope.  The
>> bindings created in this scope get passed to the function as keyword
>> arguments.
>>
>> Suite-based keyword arguments can be mixed with regular arguments:
>>
>> f(1, 2, y = 4):
>>      x = 1

   f(1, 2, y = 4,
        **def():
            x =1
            return vars())
>>
>> Motivation
>> ==========
>>
>> One motivation for suite-based keywords is to allow cleaner definitions of
>> properties.  Currently, properties are typically define as in this
>> example:
>>
>> class C(object):
>>     def getx(self):
>>        return self.__x
>>     def setx(self, value):
>>        self.__x = value
>>     def delx(self):
>>        del self.__x
>>     x = property(getx, setx, delx, "I'm the 'x' property.")
>>
>> The 'getx', 'setx', and 'delx' methods get defined in the namespace of the
>> class even though one wants only to pass them to 'property'.  Ideally, one
>> would want these methods to be defined in their own namespace.  Also, it
>> would be helpful when reading the code if the layout of the code gave
>> visual indication that their only purpose is to be used in a property.
>>
>> Using suite-based keyword arguments, and without any changes to the
>> 'property' type, this code can be written as:
>>
>> class C(object):
>>     x = property():
>>        doc = "I'm the 'x' property."
>>        def fget(self):
>>           return self.__x
>>        def fset(self, value):
>>           self.__x = value
>>        def fdel(self):
>>           del self.__x
   clas C(object):
       x = property(
          **def():
            doc = "I'm the 'x' property."
            def fget(self):
               return self.__x
            def fset(self, value):
               self.__x = value
            def fdel(self):
               del self.__x
            return vars())
  
>>
>> Here, 'fget', 'fset' and 'fdel' do not wind up as methods of the class,
>> and it is visually clear that they are methods only for the 'x' property.
>> Also, this code is less bug-prone since the name of each method need
>> appear only once.
>>
>> Passing callbacks in other situations is made similarly easier and
>> cleaner:
>>
>> setHandlers():
>>      def success():
>>          print 'success'
>>      def failure():
>>          print 'an error has occured'
>>      def apocalypse():
>>          print 'a serious error has occured'
   setHandlers(**def():
        def success():
            print 'success'
        def failure():
            print 'an error has occured'
        def apocalypse():
            print 'a serious error has occured'
        return vars())
>>
>> a = [1,3,2]
>> a.sort():
>>      def cmpfunc(x,y):
>>          return cmp(x,y)
   a.sort(**def():
            def cmpfunc(x,y)
            return vars())
>>
>> Situations that do not require callbacks can also be better organized
>> using suite-based keywords.  For example, here is code as it would
>> currently be written in Python:
>>
>> if a:
>>      x = 1
>> else:
>>      x = 2
>> f(x=x)
>>
>> When reading this code, one reaches the 'if' statment without knowing what
>> its purpose is-- layout of the code does not indicate that the 'if'
>> statement is calculating an argument to 'f'.  Also, it requires a binding
>> that serves no purpose other than to hold an argument to 'f', yet this
>> binding persists for the rest of the surrounding function.
>>
>> Here is the same code using suite-based keyword arguments
>>
>> f():
>>      if a:
>>          x = 1
>>      else:
>>          x = 2
>>
   f(**def():
        if a:
            x = 1
        else:
            x = 2
        return vars())

>> When reading this code, it is easy to skip over everything that is
>> involved in calling 'f', if one so desires.  Since the suite has its own
>> namespace, one does not have to worry that the suite creates some bindings
>> that will be important later in the function.
>
Obviously leaving out the "**def(" and the "return vars())" makes it cleaner ;-)

Regards,
Bengt Richter


From bokr at oz.net  Sat Apr 16 22:24:12 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 02:24:12 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<42607b0f$1_2@newspeer2.tds.net>
	<mailman.1997.1113635188.1799.python-list@python.org>
	<Pine.A41.4.61b.0504161319250.132108@dante73.u.washington.edu>
Message-ID: <4261c067.133764643@news.oz.net>

On Sat, 16 Apr 2005 13:58:38 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:

[...]
>
>Yes, my description of the syntax was ambiguous.  To clarify, I intended 
>the syntax to be backwardly compatible.  That is, one would not be able to 
>use a suite to define keywords if there already exists a suite for other 
>reasons.  So, one would not be able to use a suite to pass keywords to 'f' 
>in this situation:
>
>if f():
>      x = 1
>
>This code should behave exactly as it does now.
>
>I agree that the ellipsis idea probably makes the code more readable, and 
>it may be a good idea to have them for that reason.  However, ellipses are 
>not necessary as a way to disambiguate the syntax; all statements 
>containing suites currently begin with a keyword, and keyword suites would 
>not.
>
Using my expression where: trailer, the above if could be spelled

    if f(x) where: x=1: # where:<suite> acts like '' other than its semantics.
       do_something()

I was debating whether to use a where: that applied to a whole previous statement and its suite,
indenting as if the where were a following statment, e.g.,

    if f(x):
        do_something()
    where:
        x = 1

But I thought that could get too far away, and not cover many use cases that could be done
other ways. The thing that where does though is create a transient namespace for the suite
bindings, so they don't clobber the calling namespace the way just prefixing a setup would

    x = 1 # clobber x
    if f(x):
        do_something()

Shoot, I just has another idea about the ::<suite> expression -- instead of returning a tuple,
it could return an order-maintaining subtype of dict with methods for items(), keys() and values()
and that would make better spellings for many examples in Kay's post ;-/

Also suite-based keyword calling would just become

    f(10, 4, **::  # note ease of including other parameters if part of the signature
         x = 1
         y = 2 )

and you could do
    print (::
        x = 1
        y = 2
    ).keys()
    => ['x', 'y']

or call foo
    foo(self, whatever, *(::
        x = 1
        y = 2).values())

Oh well, that's the way ideas evolve ;-)

Regards,
Bengt Richter


From andrew at nospam.com  Sun Apr 17 11:46:53 2005
From: andrew at nospam.com (Andrew E)
Date: Sun, 17 Apr 2005 17:46:53 +0200
Subject: sscanf needed
In-Reply-To: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
References: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
Message-ID: <d3u0d1$khc$1@news.hispeed.ch>

Uwe Mayer wrote:
> Hi,
> 
> I've got a ISO 8601 formatted date-time string which I need to read into a
> datetime object.
> Is there a shorter way than using regular expressions? Is there a sscanf
> function as in C?

in addition to the other comments...

I like re, because it gives me the most control. See below.


import re
import datetime

class Converter:
	
	def __init__( self ):
		self.isoPattern = re.compile( "(\d\d\d\d)-(\d\d)-(\d\d)[tT
](\d\d):(\d\d):(\d\d)" )
		
	def iso2date( self, isoDateString ):
		match = self.isoPattern.match( isoDateString )
		if not match: raise ValueError( "Not in ISO format: '%s'" %
isoDateString )
		
		return datetime.datetime(
			int(match.group(1)),
			int(match.group(2)),
			int(match.group(3)),
			int(match.group(4)),
			int(match.group(5)),
			int(match.group(6))
			)

c = Converter()


def demo( iso ):
	try:
		date = c.iso2date( iso )
		print "Input '%s' -> datetime: %s" % ( iso, date )
	except ValueError, e:
		print str(e)
		
demo( "2005-04-21T12:34:56" )
demo( "2005-04-21 12:34:57" )
demo( "2005-04-2 12:34:57" )




From aahz at pythoncraft.com  Sat Apr  9 19:33:32 2005
From: aahz at pythoncraft.com (Aahz)
Date: 9 Apr 2005 16:33:32 -0700
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com> <86k6nbww6z.fsf@guru.mired.org>
Message-ID: <d39ooc$pvr$1@panix1.panix.com>

In article <86k6nbww6z.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>aahz at pythoncraft.com (Aahz) writes:
>>
>> Use vim.  80% of the power of emacs at 20% of the learning curve.
>
>Hmm. Can I read mail/news/web pages in vim? I can in emacs.

Yup, that's why emacs stands for Eighty Megabytes And Constantly
Swapping.  ;-)

>Emacs is a computing environment. I read mail and news in it, so I
>don't have to worry about learning some applications custom editor
>(ok, a good MUA/newsreader will invoke my favorite editor - but that's
>Emacs, so why bother). I use emacs for the heavy lifting.

Doesn't work so well when you want to use an application that isn't
emacs, yet still invoke a custom editor.  But yeah, if you consider emacs
a Way of Life, then you're making sense.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From postmaster at castleamber.com  Wed Apr 20 16:19:57 2005
From: postmaster at castleamber.com (John Bokma)
Date: 20 Apr 2005 20:19:57 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<426645bb$0$3129$8fcfb975@news.wanadoo.fr>
Message-ID: <Xns963E9BA8CA510castleamber@130.133.1.4>

Do Re Mi chel La Si Do wrote:

> +1

I am modded up :-D

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


From WLigtenberg at gmail.com  Thu Apr 21 09:17:48 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Thu, 21 Apr 2005 15:17:48 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<426640b6$1_1@newspeer2.tds.net>
Message-ID: <pan.2005.04.21.13.17.45.470495@gmail.com>

Sorry I just decided that I want to use your solution, but I am wondering
is cElemenTree in expat or is that something different?

On Wed, 20 Apr 2005
08:03:00 -0400, Kent Johnson wrote:

> Willem Ligtenberg wrote:
>>>Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
>>>
>>>>I want to parse a very large (2.4 gig) XML file (bioinformatics
>>>>ofcourse :)) But I have no clue how to do that. Most things I see read
>>>>the entire xml file at once. That isn't going to work here ofcourse.
>>>>
>>>>So I would like to parse a XML file one record at a time and then be
>>>>able to store the information in another object.  How should I do
>>>>that?
>> 
>> The XML file I need to parse contains information about genes.
>> So the first element is a gene and then there are a lot sub-elements with
>> sub-elements. I only need some of the informtion and want to store it in
>> my an object called gene. Lateron this information will be printed into a
>> file, which in it's turn will be fed into some other program.
>> This is an example of the XML
>> <?xml version="1.0"?>
>> <!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN" "NCBI_Entrezgene.dtd">
>> <Entrezgene-Set>
>>   <Entrezgene>
>>     <snip>
>>   </Entrezgene>
>> </Entrezgene-Set>
> 
> This should get you started with cElementTree:
> 
> import cElementTree as ElementTree
> 
> source = 'Entrezgene.xml'
> 
> for event, elem in ElementTree.iterparse(source):
>      if elem.tag == 'Entrezgene':
>          # Process the Entrezgene element
>          geneid = elem.findtext('Entrezgene_track-info/Gene-track/Gene-track_geneid')
>          print 'Gene id', geneid
> 
>          # Throw away the element, we're done with it
>          elem.clear()
> 
> Kent



From vedanta.barooah at gmail.com  Fri Apr 22 15:47:58 2005
From: vedanta.barooah at gmail.com (Vedanta Barooah)
Date: Sat, 23 Apr 2005 01:17:58 +0530
Subject: rpm-python help!!
Message-ID: <c52b4e4c05042212472dde99b8@mail.gmail.com>

Hello All,

Has anyone worked with rpm-python, i am kinda stuck in the addErase() 
function, Any help will be appreciated!

Thanks,
Vedanta

Here is the code:

#!/bin/env python
import os,rpm,md5,sys

class rpm_cb:
def __init__(self):
self.fdno={}


def callbackInstall(self, what, amount, total, mydata, wibble):
if what == rpm.RPMCALLBACK_TRANS_START:
pass

elif what == rpm.RPMCALLBACK_INST_OPEN_FILE:
hdr, path = mydata
print "Installing %s\r" % (hdr["name"])
fdno = os.open(path, os.O_RDONLY)
nvr = '%s-%s-%s' % ( hdr['name'], hdr['version'], hdr['release'] )
self.fdno[nvr] = fdno
return fdno

elif what == rpm.RPMCALLBACK_INST_CLOSE_FILE:
hdr, path = mydata
nvr = '%s-%s-%s' % ( hdr['name'], hdr['version'], hdr['release'] )
os.close(self.fdno[nvr])

elif what == rpm.RPMCALLBACK_INST_PROGRESS:
hdr, path = mydata
print "%s: %.5s%% done\r" % (hdr["name"], (float(amount) / total) * 100)

def callbackRemove(self, what, amount, total, mydata, wibble):
if what == rpm.RPMCALLBACK_TRANS_START:
pass

#elif what == rpm.RPMCALLBACK_INST_OPEN_FILE:
# hdr, path = mydata
# print "Installing %s\r" % (hdr["name"])
# fdno = os.open(path, os.O_RDONLY)
# nvr = '%s-%s-%s' % ( hdr['name'], hdr['version'], hdr['release'] )
# self.fdno[nvr] = fdno
# return fdno

#elif what == rpm.RPMCALLBACK_INST_CLOSE_FILE:
# hdr, path = mydata
# nvr = '%s-%s-%s' % ( hdr['name'], hdr['version'], hdr['release'] )
# os.close(self.fdno[nvr])

elif what == rpm.RPMCALLBACK_UNINST_START:


elif what == rpm.RPMCALLBACK_INST_PROGRESS:
hdr, path = mydata
print "%s: %.5s%% done\r" % (hdr["name"], (float(amount) / total) * 100)


class myrpm:
def queryInstalledPackage(self,rpmname):
ts = rpm.ts()
mi = ts.dbMatch("name",rpmname)
for hdr in mi:
print "%s-%s-%s" % (hdr['name'],hdr['version'],hdr['release'])

def queryInstalledPackages(self,pattern):
ts = rpm.ts()
mi = ts.dbMatch()
mi.pattern("name",rpm.RPMMIRE_GLOB,pattern)
for hdr in mi:
print "%s-%s-%s" % (hdr['name'],hdr['version'],hdr['release'])

def queryPackage(self,rpmlocation):
ts = rpm.ts()
fdno=os.open(rpmlocation,os.O_RDONLY)
try:
hdr = ts.hdrFromFdno(fdno)
except:
fdno=os.open(rpmlocation,os.O_RDONLY)
ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES)
hdr = ts.hdrFromFdno(fdno)
os.close(fdno)
print "%s-%s-%s : %s" % 
(hdr['name'],hdr['version'],hdr['release'],hdr['description'])

def install(self,rpmlocation):
ts = rpm.ts()
fdno=os.open(rpmlocation,os.O_RDONLY)
try:
hdr = ts.hdrFromFdno(fdno)
except:
fdno=os.open(rpmlocation,os.O_RDONLY)
ts.setVSFlags(rpm._RPMVSF_NOSIGNATURES)
hdr = ts.hdrFromFdno(fdno)
os.close(fdno)
ts.addInstall(hdr,(hdr,rpmlocation),"u")
cb=rpm_cb()
ts.run(cb.callbackInstall,'')

def remove(self,rpmname):
ts = rpm.ts()
mi = ts.dbMatch(rpm.RPMTAG_NAME,rpmname)
mi.pattern(rpm.RPMTAG_ARCH,rpm.RPMMIRE_DEFAULT,"i386")
for idx in mi:
instance = mi.instance()
#ts.addErase(instance)
print type(instance);



if __name__=="__main__":
x=myrpm()

# query a particular installed package
#x.queryInstalledPackage(sys.argv[1])

# query many installed packages using regex
#x.queryInstalledPackages(sys.argv[1])

# query a package that exists in rpmlocation, but is not installed
#x.queryPackage(sys.argv[1])

# install a package
#x.install(sys.argv[1])

# uninstall a package
x.remove(sys.argv[1])


-- 
*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*
Vedanta Barooah
YM! - vedanta2006
Skype - vedanta2006
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From martin.witte at gmail.com  Sat Apr 30 08:26:52 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Apr 2005 05:26:52 -0700
Subject: Writing to log file when script is killed
In-Reply-To: <1114851873.072376.225820@z14g2000cwz.googlegroups.com>
References: <1114851873.072376.225820@z14g2000cwz.googlegroups.com>
Message-ID: <1114864012.637007.295800@z14g2000cwz.googlegroups.com>

If you run on unix you can use the signal module to intercept a kill -
see http://docs.python.org/lib/node368.html for a quick example



From jorgen.cederberg at gmail.com  Tue Apr 19 10:22:37 2005
From: jorgen.cederberg at gmail.com (=?ISO-8859-1?Q?J=F8rgen_Cederberg?=)
Date: Tue, 19 Apr 2005 16:22:37 +0200
Subject: Update Label when Scale value changes
In-Reply-To: <1113919325.498539.323190@o13g2000cwo.googlegroups.com>
References: <1113916746.841747.274550@l41g2000cwc.googlegroups.com>
	<9Z79e.969$cL6.77@news.get2net.dk>
	<1113919325.498539.323190@o13g2000cwo.googlegroups.com>
Message-ID: <Nu89e.1023$du6.687@news.get2net.dk>

codecraig wrote:

> Yea that is what i needed.  Can you recommend a good Tkinter site (or
> book, but preferably site) about learning Tkinter.
> 
> I've tried:
> http://www.python.org/moin/TkInter
> http://www.pythonware.com/library/tkinter/introduction/
> 
> But I am looking for more about events, etc.
> 
> Thanks
> 

Hi

the above links are good. Also check out
http://infohost.nmt.edu/tcc/help/pubs/tkinter/
which has a lot of information on events.

/Jorgen Cederberg




From zanesdad at bellsouth.net  Thu Apr 14 18:47:57 2005
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Thu, 14 Apr 2005 18:47:57 -0400
Subject: SimpleXMLRPCServer - disable output
In-Reply-To: <1113517877.473126.259590@o13g2000cwo.googlegroups.com>
References: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>	<mailman.1930.1113511323.1799.python-list@python.org>
	<1113517877.473126.259590@o13g2000cwo.googlegroups.com>
Message-ID: <425EF31D.5060806@bellsouth.net>

codecraig wrote:

>Jeremy Jones wrote:
>  
>
>>codecraig wrote:
>>
>>    
>>
>>>Hi,
>>> I thought I posted this, but its been about 10min and hasnt shown
>>>      
>>>
>up
>  
>
>>>on the group.
>>> Basically I created a SimpleXMLRPCServer and when one of its
>>>      
>>>
>methods
>  
>
>>>gets called and it returns a response to the client, the server
>>>      
>>>
>prints
>  
>
>>>some info out to the console, such as,
>>>
>>>localhost - - [14/Apr/2005 16:06:28] "POST /RPC2 HTTP/1.0" 200 -
>>>
>>>Anyhow, is there a way I can surpress that so its not printed to the
>>>console? I looked at SimpleXMLRPCServer.py ...it doesn't explicitly
>>>print that, I think perhaps std is...but not sure.   Any ideas??
>>>
>>>thanks.
>>>
>>>
>>>
>>>      
>>>
>>Here's the entire SimpleMLRPCServer class from SimpleXMLRPCServer.py:
>>
>>
>>class SimpleXMLRPCServer(SocketServer.TCPServer,
>>                         SimpleXMLRPCDispatcher):
>>    """Simple XML-RPC server.
>>
>>    Simple XML-RPC server that allows functions and a single instance
>>    to be installed to handle requests. The default implementation
>>    attempts to dispatch XML-RPC calls to the functions or instance
>>    installed in the server. Override the _dispatch method inhereted
>>    from SimpleXMLRPCDispatcher to change this behavior.
>>    """
>>
>>    def __init__(self, addr,
>>    
>>
>requestHandler=SimpleXMLRPCRequestHandler,
>  
>
>>                 logRequests=1):
>>        self.logRequests = logRequests
>>
>>        SimpleXMLRPCDispatcher.__init__(self)
>>        SocketServer.TCPServer.__init__(self, addr, requestHandler)
>>
>>You should be able to change logRequests to 0 and that should fix it.
>>    
>>
> I just tested it at a prompt and it worked just fine.
>  
>
>>Jeremy Jones
>>    
>>
>
>Jeremy,
>  So can you explain what I can do to set logRequests = 0?  Do i just
>do..
>
>server = SimpleXMLRPCServer(0)  ???
>
>I am sorta new to python thanks.
>
>  
>
You've got a couple of options.  You can either set it in the
constructor (server = SimpleXMLRPCServer(addr,
requestHandler=somehandler, logRequests=0)) or you can set it after you
have an instance of it (<<create an instance named foo>>;
foo.logRequests = 0).

HTH,

Jeremy Jones
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From farcepest at gmail.com  Thu Apr 14 18:46:16 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 14 Apr 2005 15:46:16 -0700
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
	<1113231173.277597.226710@g14g2000cwa.googlegroups.com>
	<mailman.1848.1113407556.1799.python-list@python.org>
Message-ID: <1113518776.127481.10550@l41g2000cwc.googlegroups.com>

Mage wrote:
> Andy Dustman wrote:
>
> >
> >Transactions available since 3.23.17 (June 2000)
> >
> >
> Transactions only supported on slow database types like innodb.
>
> If you ever tried it you cannot say that mysql supports transactions.
No.
> Last time when I tried mysql 4.x did explicit commit if you simply
> disconnected inside a transaction block. It was a year ago, but I
will
> never forget it.

You know that the default server setting has autocommit on, right?

> >>foreign keys,
> >>
> >>
> >
> >Foreign keys available since 3.23.44 (Oct 2001)
> >
> >
> They are syntactically accepted but not forced.

http://dev.mysql.com/doc/mysql/en/innodb-foreign-key-constraints.html
http://dev.mysql.com/doc/mysql/en/error-handling.html

  # Error: 1215 SQLSTATE: HY000 (ER_CANNOT_ADD_FOREIGN)
    Message: Cannot add foreign key constraint

  # Error: 1216 SQLSTATE: 23000 (ER_NO_REFERENCED_ROW)
    Message: Cannot add or update a child row: a foreign key constraint
fails

  # Error: 1217 SQLSTATE: 23000 (ER_ROW_IS_REFERENCED)
    Message: Cannot delete or update a parent row: a foreign key
constraint
    fails

Foreign keys work. Prior to 3.23, it was just syntactical support. But
that was 5 years ago.

> I have seen real benchmarks. MySQL 5 is slower than postgresql and
it's
> also slower than firebird if you do some real work.

So use the database that works best for your application. MySQL is not
a panacea, but there are a lot of applications it works well for.



From codecraig at gmail.com  Fri Apr 15 18:17:44 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 15:17:44 -0700
Subject: py2exe - create one EXE
In-Reply-To: <mailman.1987.1113602145.1799.python-list@python.org>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<b273c74105041510196bff2c9e@mail.gmail.com>
	<mailman.1987.1113602145.1799.python-list@python.org>
Message-ID: <1113603464.174120.121970@f14g2000cwb.googlegroups.com>

fredrik...

    any ideas on my last post?  (copied below for u)

oh and Fredrik, i tried the SingleInstaller link....which points to a
script using NSIS.  I followed those instructions which generated an
.exe.   HOwever, when i run the .exe nothing happens (meaning no
process starts, no output, no errors, nothing).

any ideas on that?  have ever used it? 

thanks



From antonyliu2002 at yahoo.com  Tue Apr 19 22:52:17 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Tue, 19 Apr 2005 19:52:17 -0700 (PDT)
Subject: Importing some functions from a py file
In-Reply-To: 6667
Message-ID: <20050420025217.46333.qmail@web54501.mail.yahoo.com>


--- Michael Soulier <msoulier at gmail.com> wrote:
> On 4/19/05, Anthony Liu <antonyliu2002 at yahoo.com>
> wrote:
> > But every time, I run code2.py, the main() of
> code1.py
> > is run.
> 
> You probably did not protect your main function in
> both modules. 
> 
> ie. 
> 
> if __name__ == '__main__': main()
> 

You are certainly right, because I don't know how to
protect the main functions.  Where do I put

if __name__ == '__main__': main()

?




		
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Do you Yahoo!? 
Yahoo! Mail - Find what you need with new enhanced search. 
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From cam.ac.uk at mh391.invalid  Sun Apr 17 03:45:12 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 17 Apr 2005 08:45:12 +0100
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <d3t46a$jcv$1@gemini.csx.cam.ac.uk>

lucio.torre at gmail.com wrote:

> Some months ago i did a port of the Python2.3.2 interpreter to PalmOS.
> I didnt port any C module or created modules for PalmOS API's.

Just port ctypes. Then we'll be good to go. <wink>

Seriously, this looks like a cool beginning.
-- 
Michael Hoffman


From hongqn at gmail.com  Sat Apr 30 23:00:57 2005
From: hongqn at gmail.com (Qiangning Hong)
Date: 30 Apr 2005 20:00:57 -0700
Subject: compare two voices
Message-ID: <1114916457.795332.45220@f14g2000cwb.googlegroups.com>

I want to make an app to help students study foreign language.  I want
the following function in it:

The student reads a piece of text to the microphone. The software
records it and compares it to the wave-file pre-recorded by the
teacher, and gives out a score to indicate the similarity between them.

This function will help the students pronounce properly, I think.

Is there an existing library (C or Python) to do this?  Or if someone
can guide me to a ready-to-implement algorithm?



From g.brandl at gmx.net  Mon Apr  4 12:53:47 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Mon, 04 Apr 2005 18:53:47 +0200
Subject: "specialdict" module
In-Reply-To: <3bd9jgF6heia2U1@individual.net>
References: <3bamhhF6j009lU1@individual.net>
	<mailman.1264.1112560102.1799.python-list@python.org>
	<3bb433F6fn6t3U1@individual.net>
	<1112631551.683072.80970@f14g2000cwb.googlegroups.com>
	<3bd9jgF6heia2U1@individual.net>
Message-ID: <3bd9nnF6heia2U2@individual.net>

Georg Brandl wrote:
> Michele Simionato wrote:
>> About not using super: you might have problems in multiple inheritance.
>> Suppose I want to use both your defaultdict and a thirdpartdict. A
>> subclass
>> 
>> class mydict(defaultdict, thirdpartdict):
>>    pass
>> 
>> would not work if thirdpartdict requires a non-trivial __init__ , since
>> without super in defaultdict.__init__ you would just call dict.__init__
>> and not thirdpartdict.
> 
> Right. I thought about a combined defaultdict/keytransformdict,
> which seems to be easy to create with the current implementation:
> 
> class defaultkeytransformdict(defaultdict, keytransformdict):
>     pass
> 
> At least I hope so. This is another argument against the initializing
> of defaultfactory or keytransformer in __init__.
> 
> mfg
> Georg
> 
> Here comes the current module (keytransformdict should be working now
> for all dict methods):
> 
> # specialdict - subclasses of dict for common tasks
> #
> 
> class NoDefaultGiven(Exception):
>     pass
> 
> class defaultdict(dict):
>     __slots__ = ['_default']
> 
>     def __init__(self, *args, **kwargs):
>         self._defaulttype = 0
          ^^^^^^^^^^^^^^^^^^^^^

This must read "self.cleardefault()", of course.

mfg
Georg


From tjreedy at udel.edu  Wed Apr 27 12:23:22 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 27 Apr 2005 12:23:22 -0400
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org><mailman.2524.1114533204.1799.python-list@python.org><d4mc39$dl9$1@domitilla.aioe.org>
	<426F2C3A.80402@v.loewis.de> <d4nrhu$rl3$1@domitilla.aioe.org>
Message-ID: <d4odvj$7t0$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:d4nrhu$rl3$1 at domitilla.aioe.org...
> So my alternative solution is that PyPI have a mechanism to maintain what 
> had been installed in the site-package directory and to download the 
> libraries and install into the new site-package directory...

> What do you think?

I doubt anyone disputes that upgrades are more hassle than we would like. 
My main point was that freezing CPython's technology is not the solution. 
Any other upgrade helper that you can contribute will be welcome.

Terry J. Reedy





From mefjr75 at hotmail.com  Sat Apr 30 12:31:38 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 30 Apr 2005 09:31:38 -0700
Subject: interactive web graphics
In-Reply-To: <mailman.44.1114808122.14961.python-list@python.org>
References: <mailman.44.1114808122.14961.python-list@python.org>
Message-ID: <1114878698.151389.73560@l41g2000cwc.googlegroups.com>

Blender has nothing to do with Mozilla.
It is a 3d creation suite it contains more things than you would
believe ;)
Blender is deep and wide, so it can be daunting to use at first but
once you have basic 3d concepts under you belt it is playtime.
Blender is the first software package to be bought from a private
company by a community to be put into opensource. Really cool stuff has
been happening ever since they went opensource. The game engine has
taken the longest to put back together, it was removed because of
licensing issues.  So the old game plugin might not be up to date but
it will eventually be revamped when the 'new' game engine is stable.
Until then you might be able to use the old one but I have had many
problems getting it to work reliably on Firefox or Mozilla, it works
well with I.E. but ........
Have fun and experiment. 
M.E.Farmer



From jerf at jerf.org  Tue Apr 26 23:53:13 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 23:53:13 -0400
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
	<pan.2005.04.26.19.13.19.951487@jerf.org>
	<86r7gxkldl.fsf@guru.mired.org>
Message-ID: <pan.2005.04.27.03.53.13.696070@jerf.org>

On Tue, 26 Apr 2005 21:24:06 -0500, Mike Meyer wrote:

> Jeremy Bowers <jerf at jerf.org> writes:
> 
>> On Tue, 26 Apr 2005 03:40:16 -0700, ajikoe at gmail.com wrote:
>> os.remove, as the module name implies, tells the OS to do something. I
>> would consider an OS that returned from a "remove" call, but still let you
>> access that file, highly broken. 
> 
> Um - not if you have permission to read the file, but don't have
> permission to remove it.

You snipped:

>> assuming the file is there, you have permissions, etc., basically that
>> the call succeeds,

First paragraph.



From rganesan at myrealbox.com  Wed Apr 20 02:06:14 2005
From: rganesan at myrealbox.com (Ganesan Rajagopal)
Date: 20 Apr 2005 11:36:14 +0530
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <xkvh7jiykmnd.fsf@cisco.com>

>>>>> "seberino at spawar" == seberino at spawar navy mil <seberino at spawar.navy.mil> writes:

> Many people I know ask why Python does slicing the way it does.....
> Can anyone /please/ give me a good defense/justification???

Try http://www.everything2.com/index.pl?node_id=1409551

Ganesan

-- 
Ganesan Rajagopal (rganesan at debian.org) | GPG Key: 1024D/5D8C12EA
Web: http://employees.org/~rganesan        | http://rganesan.blogspot.com



From harold.fellermann at upf.edu  Thu Apr 14 12:39:14 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Thu, 14 Apr 2005 18:39:14 +0200
Subject: curses for different terminals
Message-ID: <0e347ff142b50459ee579b8d44e91d9b@upf.edu>

Hi all,

I want to use curses in a server application that provides a GUI for 
telnet clients. Therefore, I need the functionality to open and handle 
several
screens. Concerning 
http://dickey.his.com/ncurses/ncurses-intro.html#init
this can be done using the function newterm(type,ofp,ifp). However, this
function seems not to be defined in the python library. Does anyone know
how this can be done in python?

cheers,

- harold -

--
Life is what happens while you're busy making other plans
-- John Lennon



From serpent17 at gmail.com  Wed Apr 27 12:46:27 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 27 Apr 2005 09:46:27 -0700
Subject: How do I parse this ? regexp ?
In-Reply-To: <mailman.2587.1114618447.1799.python-list@python.org>
References: <mailman.2587.1114618447.1799.python-list@python.org>
Message-ID: <1114620387.283743.163460@z14g2000cwz.googlegroups.com>

Thank you, it works, but I guess not all the way:

for instance, I have this:
04242005 18:20:42-0.024329, 271.2469504, [-4.097900390625,
3.4332275390625, 105.062255859375], [0.0384521484375, 0.08416748046875,
-1.026885986328125], [0.00640869140625, 0.00885009765625,
0.00701904296875]

translates into


'04242005 18:20:42-0.024329  271.2469504   -4.097900390625
3.4332275390625  105.062255859375    0.0384521484375  0.08416748046875
-1.026885986328125    0.00640869140625  0.00885009765625
0.00701904296875 \n'

but I need to remove the first - between 18:20:42 and 0.024329 but not
the others.

Thank you in advance,

Jake.



From db3l at fitlinxx.com  Tue Apr 19 18:16:36 2005
From: db3l at fitlinxx.com (David Bolen)
Date: 19 Apr 2005 18:16:36 -0400
Subject: email: Content-Disposition and linebreaks with long filenames
References: <d3ik62$4rm$1@beech.fernuni-hagen.de>
Message-ID: <umzrutnsr.fsf@fitlinxx.com>

Martin K?rner <me at mkone.net> writes:

> I am using email module for creating mails with attachment (and then
> sending via smtplib).
> 
> If the name of the attachment file is longer than about 60 characters
> the filename is wrapped in the Content-Disposition header:
> 
> Content-Disposition: attachment;
> 	filename="This is a sample file with a very long filename
> 	0123456789.zip"
> 
> 
> This leads to a wrong attachment filename in email clients - the space
> after "filename" is not shown or the client displays a special
> character (the linbreak or tab before 0123456789.zip).

Yes, it would appear that the default Generator used by the Message
object to create a textual version of a message explicitly uses tab
(\t) as a continuation character rather than space - probably because
it looks a little nicer when printed.  Interestingly enough, the
default Header continuation character is just a plain space which
would work fine here.

I should point out that I believe this header format could be
considered correct, although I find RFC2822 a bit ambiguous on this
point.  It talks about runs of FWS (folding white space) in an
unfolding operation as being considered a single space (section
3.2.3).  However, I suppose someone might argue if "runs" includes a
single character.  I think it should, but obviously some e-mail
clients disagree :-)

(...)
> Is it possible to prevent the linebreak?

Should be - two approaches I can think of (msg below is the email.Message):

1) Create your own Header object for the specific header line rather than
   just storing it as a string via add_header.  For that specific header you
   can then override the default maximum line length.  Something like:

    from email.Header import Header

    cd_header = Header('Content-Disposition: attachment; filename="....."',
                       maxlinelen=998)
    msg['Content-Disposition'] = cd_header

   Note that because Header defaults to a space continuation character,
   you could also leave maxlinelen alone and let it break the line, but
   since it would break with a single space it would work right in clients.

2) Use your own Generator object to generate the textual version of the
   message (which is when the wrapping is occurring), and during the
   flattening process, disable (or set a longer value for) header wrapping.
   Something like:

   Assuming "fp" is an output File-like object:

    from email.Generator import Generator

    g = Generator(fp)
    g.flatten(msg, maxheaderlen=998)   (or maxheaderlen=0 to disable wrapping)


-- David


From sjmachin at lexicon.net  Tue Apr 12 18:07:06 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 13 Apr 2005 08:07:06 +1000
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1746.1113303998.1799.python-list@python.org>
Message-ID: <sjeo51hst8a26uqd0ejlv30l5tjnkh43j6@4ax.com>

On Tue, 12 Apr 2005 13:06:36 +0200, Roman Neuhauser
<neuhauser+python-list#python.org at sigpipe.cz> wrote:

>
>    Unfortunately, the python community seems to bathe in the
>    misorganized half-documentation, see e. g.
>    http://marc.theaimsgroup.com/?l=python-list&m=111303919606261&w=2
>    especially the reply that (as I read it) suggested reverse
>    engineering as a viable alternative to documentation.


As I read the reply, it was a smart-arse attempt at humour, a *PUN* on
the word "list" (mailing list versus Python list). What I would call
"introspection" (not "reverse engineering") was then suggested.

Moreover, both of the concepts mentioned in the quoted thread
(sequence.index() and the "in" operator) are IMESHO adequately
documented.

Do you have any examples of what you regard as "misorganized
half-documentation"?

Here's a puzzle for you: Where does this list appear? What's missing?

"..., Mullender, Nagata, Ng, Oner, Oppelstrup, ..."




From strombrg at dcs.nac.uci.edu  Thu Apr  7 19:31:02 2005
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Thu, 07 Apr 2005 23:31:02 GMT
Subject: bourne shell parser in python
Message-ID: <pan.2005.04.07.23.31.02.247979@dcs.nac.uci.edu>


Hi folks.

We have a huge collection of sysadmin knowledge that's encoded in a vast
array of bourne shell scripts.

I'm now beginning to think that a transition to cfengine or similar might
be a good idea, but I'm loathe to toss out all that /bin/sh code that's
kept us from having to worry about neglecting this, that and the other
thing for so long.

So I guess my question is: "Is there a /bin/sh parser written in one of
the many python-based parser-generator systems?"

Thanks!



From fredrik at pythonware.com  Tue Apr 12 14:17:13 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 20:17:13 +0200
Subject: Removing comments... tokenize error
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
Message-ID: <d3h3eq$n63$1@sea.gmane.org>

"qwweeeit" <qwweeeit at yahoo.it> wrote:

> I don't know if this has already been corrected (I use Python 2.3)
> or perhaps is a mistake on my part...

it's a mistake on your part.  adding a print statement to the for-
loop might help you figure it out:

> nLastLine=0
> for i in tokenize.generate_tokens(f.readline):
       print i
> .   if nLastLine != (i[2])[0]:   # the 3rd element of the tuple is
> .   .   nLastLine = (i[2])[0]    # (startingRow, startingCol)
> .   .   fOut.write(i[4])

(hints: what happens if a token spans multiple lines?  and how does
the tokenize module deal with comments?)

</F>





From achrist at easystreet.com  Sat Apr  9 17:15:38 2005
From: achrist at easystreet.com (Al Christians)
Date: Sat, 09 Apr 2005 14:15:38 -0700
Subject: ntvdm problem on win2k
In-Reply-To: <1742sqz77o8kb.dlg@usenet.alexanderweb.de>
References: <115g61r25jhbaac@corp.supernews.com>
	<1742sqz77o8kb.dlg@usenet.alexanderweb.de>
Message-ID: <115ghgd6gbamob2@corp.supernews.com>

Alexander Schremmer wrote:

> Windows tries to execute the cygwin symbolic link and fails.
> Correcting your path works (as you said).

One thing about that: I re-installed python (ie upgraded to python 
2.3.5) and it did not solve the error.  I assume that the python 2.3.5 
installer is so well-mannered that it did not put itself at the head of 
the path, but saw that it was already in the path somewhere, and left 
itself there.  This is nice, but it was disappointing, in that I did a 
fresh install to no avail.  And, is it not fairly common for other 
installers of less refined software to add to the head of the path each 
time that they run, no matter how many times the same entry is repeated.
So, by being very nice, python is sort of non-conformist or nearly 
eccentric, which I wish everyone would be.  But how can one despise 99% 
of everything?

When I installed cygwin, I checked it for python.  It had something like 
python2.4.1.exe visible, but that symbolic link was not.

No big deal.


Al


From Bill at SynectixLtd.com  Thu Apr 21 04:20:32 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Thu, 21 Apr 2005 08:20:32 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2108.1113922028.1799.python-list@python.org>
	<d45dh8$ppl$1@sparta.btinternet.com> <4266871c$1@nntp0.pdx.net>
Message-ID: <d47nog$duk$1@sparta.btinternet.com>

Hi Scott,
Nice idea.  Tried that but no more information about where the file was 
(not) found (see below).
But many thanks for a useful flag.  I did not see them in the documentation. 
What should I be lkooking for? [StopPres: Ah ha -h why did I not think of 
that?]
Bill

# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
# C:\Python24\lib\site.pyc matches C:\Python24\lib\site.py
import site # precompiled from C:\Python24\lib\site.pyc
# C:\Python24\lib\os.pyc matches C:\Python24\lib\os.py
import os # precompiled from C:\Python24\lib\os.pyc
import nt # builtin
# C:\Python24\lib\ntpath.pyc matches C:\Python24\lib\ntpath.py
import ntpath # precompiled from C:\Python24\lib\ntpath.pyc
# C:\Python24\lib\stat.pyc matches C:\Python24\lib\stat.py
import stat # precompiled from C:\Python24\lib\stat.pyc
# C:\Python24\lib\UserDict.pyc matches C:\Python24\lib\UserDict.py
import UserDict # precompiled from C:\Python24\lib\UserDict.pyc
# C:\Python24\lib\copy_reg.pyc matches C:\Python24\lib\copy_reg.py
import copy_reg # precompiled from C:\Python24\lib\copy_reg.pyc
# C:\Python24\lib\types.pyc matches C:\Python24\lib\types.py
import types # precompiled from C:\Python24\lib\types.pyc
# C:\Python24\lib\locale.pyc matches C:\Python24\lib\locale.py
import locale # precompiled from C:\Python24\lib\locale.pyc
import _locale # builtin
# C:\Python24\lib\codecs.pyc matches C:\Python24\lib\codecs.py
import codecs # precompiled from C:\Python24\lib\codecs.pyc
import _codecs # builtin
import encodings # directory C:\Python24\lib\encodings
# C:\Python24\lib\encodings\__init__.pyc matches 
C:\Python24\lib\encodings\__ini
t__.py
import encodings # precompiled from C:\Python24\lib\encodings\__init__.pyc
# C:\Python24\lib\encodings\aliases.pyc matches 
C:\Python24\lib\encodings\aliase
s.py
import encodings.aliases # precompiled from 
C:\Python24\lib\encodings\aliases.py
c
# C:\Python24\lib\encodings\cp1252.pyc matches 
C:\Python24\lib\encodings\cp1252.
py
import encodings.cp1252 # precompiled from 
C:\Python24\lib\encodings\cp1252.pyc
# C:\Python24\lib\warnings.pyc matches C:\Python24\lib\warnings.py
import warnings # precompiled from C:\Python24\lib\warnings.pyc
# C:\Python24\lib\linecache.pyc matches C:\Python24\lib\linecache.py
import linecache # precompiled from C:\Python24\lib\linecache.pyc
Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
# C:\Python24\lib\encodings\cp850.pyc matches 
C:\Python24\lib\encodings\cp850.py

import encodings.cp850 # precompiled from 
C:\Python24\lib\encodings\cp850.pyc
>>> import SHIP
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named SHIP
>>> import SHIP_d
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named SHIP_d
>>> import _SHIP
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named _SHIP
>>> import _SHIP_d
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: DLL load failed: The specified module could not be found.
>>> _SHIP_d
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name '_SHIP_d' is not defined
>>>
"Scott David Daniels" <Scott.Daniels at Acm.Org> wrote in message 
news:4266871c$1 at nntp0.pdx.net...
> Bill Davy wrote:
>> Thanks Jaime,
>>
>> I'm making gradual progress and am finding it quite satisfying.  Resorted 
>> to tracing Python in MSVC6 to see what it was trying to IMPORT, which is 
>> a bit heavy but thank heavens for the sources.
> You might try running python from a command window and running it "-v" as 
> in:
>
>     python -v prog.py -args ...
>
> --Scott David Daniels
> Scott.Daniels at Acm.Org 




From thn at mail.utexas.edu  Thu Apr 14 19:54:16 2005
From: thn at mail.utexas.edu (Thomas Nelson)
Date: Thu, 14 Apr 2005 18:54:16 -0500
Subject: new to mac OS10
Message-ID: <d3mvre$q7m$1@geraldo.cc.utexas.edu>

I'm on a mac OS X (10.3.8), and I seem to have accidentally destroyed 
the default python installation.  How should I put it on?  Do I need to 
use the unix version?  any help would be greatly appreciated.

THN


From skip at pobox.com  Fri Apr  1 08:07:12 2005
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 1 Apr 2005 07:07:12 -0600
Subject: Spider - path conflict [../test.htm,www.nic.nl/index.html]
In-Reply-To: <1112357294.881735.287370@o13g2000cwo.googlegroups.com>
References: <1112357294.881735.287370@o13g2000cwo.googlegroups.com>
Message-ID: <16973.18304.369331.290488@montanaro.dyndns.org>


    martijn> I thought I was ready with my own spider...  But then there was
    martijn> a bug, or in other words a missing part in my code.

    martijn> I forget that people do this in website html:
    martijn> <a href="http://www.nic.nl/monkey.html">is oke</a>
    martijn> <a href="../monkey.html">error</a>
    martijn> <a href="../../monkey.html">error</a>

pydoc urlparse.urljoin

Skip


From tomlongridge at gmail.com  Mon Apr 18 07:42:17 2005
From: tomlongridge at gmail.com (Tom Longridge)
Date: 18 Apr 2005 04:42:17 -0700
Subject: Strings and Lists
Message-ID: <d769864e.0504180342.426357d3@posting.google.com>

My current Python project involves lots repeatating code blocks,
mainly centred around a binary string of data. It's a genetic
algorithm in which there are lots of strings (the chromosomes) which
get mixed, mutated and compared a lot.

Given Python's great list processing abilities and the relative
inefficiencies some string operations, I was considering using a list
of True and False values rather than a binary string.

I somehow doubt there would be a clear-cut answer to this, but from
this description, does anyone have any reason to think that one way
would be much more efficient than the other? (I realise the best way
would be to do both and `timeit` to see which is faster, but it's a
sizeable program and if anybody considers it a no-brainer I'd much
rather know now!)

Any advice would be gladly recieved.


From kent37 at tds.net  Fri Apr 29 06:49:32 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 29 Apr 2005 06:49:32 -0400
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
Message-ID: <42720ccb$1_2@newspeer2.tds.net>

possibilitybox wrote:
> this code here:
> 
> 
> def wordcount(lines):
>     for i in range(len(lines)/8):
>         words = lines[i].split(" ")
>         if not locals().has_key("frequency"):
>             frequency = {}
>         for word in words:
>             if frequency.has_key(word):
>                 frequency[word] += 1
>             else:
>                 frequency[word] = 1
>     return frequency
> wordcount(lines)
> 
> is taking over six minutes to run on a two megabyte text file.  i
> realize that's a big text file, a really big one (it's actually the
> full text of don quixote.).  i'm trying to figure out how.  is there a
> better way for me to do a frequency count of all the words in the text?
>  it seems to me like this should scale linearly, but perhaps it isn't?
> i don't know much about algorithmic complexity.  if someone could give
> a breakdown of this functions complexity as well i'd be much obliged.
> 
> lines is expected to be a list of lines as provided by file.readline()
> 

Here is a little cleaner version. It takes about a second to run on my PC. What hardware are you 
running on?

path = 'DonQuixote.txt'

frequency = {}

for line in open(path):
     for word in line.split():
         if frequency.has_key(word):
             frequency[word] += 1
         else:
             frequency[word] = 1

print len(frequency), 'words'


Kent


From olsongt at verizon.net  Wed Apr 13 12:23:17 2005
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 13 Apr 2005 09:23:17 -0700
Subject: terminate exectutioin in PythonWin
In-Reply-To: <d3jf20$onk$2@scotsman.ed.ac.uk>
References: <d3j265$ne6$1@scotsman.ed.ac.uk>
	<4u6dnQT8_ecAk8DfRVn-pA@comcast.com>
	<d3j3em$nhh$1@scotsman.ed.ac.uk>
	<mailman.1843.1113405941.1799.python-list@python.org>
	<d3jf20$onk$2@scotsman.ed.ac.uk>
Message-ID: <1113409397.223863.253400@l41g2000cwc.googlegroups.com>


> >
> >
> D'oh. I didn't think of that.
>
> Thanks
>
> Jim

A little off-topic, but here's a little more fun with pythonwin.  You
can spawn the debugging environment from a normal python script running
outside of pythonwin with:

import pywin.debugger;pywin.debugger.set_trace()

Also note that 'pywin.debugger.set_trace()' can be used anywhere if
you're trying to 'keep' breakpoints in the code without relying an an
IDE or project tracking them for you.



From danb_83 at yahoo.com  Wed Apr 13 13:21:39 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Apr 2005 10:21:39 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
	<425d3b01$1@nntp0.pdx.net>
Message-ID: <1113412899.536885.285890@g14g2000cwa.googlegroups.com>

Scott David Daniels wrote:
> Roy Smith wrote:
> > In article <1113390479.738210.49530 at z14g2000cwz.googlegroups.com>,
> >  "Dan Bishop" <danb_83 at yahoo.com> wrote:
> >
> >>But there's no reason other than tradition why you should arrange
them
> >>into groups of 10.
> >
> > Well, it is traditional for people to have 10 fingers :-)
> >
> > Other fun things to think about are negative bases.  For example,
3(10) =
> > 111(-2).  That's 1*(-2)^2  + 1*(-2)^1 + 1*(-2)^0 = 4 - 2 + 1.  I
can't
> > think of any use for negative bases, but they are a fun game to
play with
> > (if you're into that sort of stuff).
> >
> > Non-integer bases are fun too.

Pi has an interesting representation in bases between 0 and 1,
exclusive.  There are a finite number of digits after the radix point,
but an infinite number _before_ it.

> If you think those are fun, try base (1j - 1)

I think Knuth wrote something about complex bases back in the year
1000200000001000000010001.



From cmedcoff at hotmail.com  Sun Apr  3 09:00:43 2005
From: cmedcoff at hotmail.com (Chuck)
Date: Sun, 3 Apr 2005 09:00:43 -0400
Subject: Newsgroup Programming
Message-ID: <MoidnRMFi75tddLfRVn-gg@wideopenwest.com>

I've found and used the nntplib module for newgroup programming.  Can anyone 
suggest a library, technique or reference on how to combine mutliple 
messages with attachments such as mp3's, .wmv, *.avi, etc.? 




From eurleif at ecritters.biz  Fri Apr 29 14:25:45 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 29 Apr 2005 18:25:45 GMT
Subject: Reusing object methods?
In-Reply-To: <d4trsp$jsl$1@bagan.srce.hr>
References: <d4trsp$jsl$1@bagan.srce.hr>
Message-ID: <J_uce.2638$5I5.317851@newshog.newsread.com>

Ivan Voras wrote:
> I want to 'reuse' the same method from class A in class B, and without 
> introducing a common ancestor for both of them - is this possible in an 
> elegant, straightforward way?

 >>> import new
 >>>
 >>> class A:
...     def foo(self):
...         print "Hello, %s!" % self.__class__.__name__
...
 >>> class B:
...     def __init__(self):
...         self.foo = new.instancemethod(A.foo.im_func, self, B)
...
 >>> A().foo()
Hello, A!
 >>> B().foo()
Hello, B!


From andre.roberge at gmail.com  Wed Apr 20 12:03:01 2005
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9_Roberge?=)
Date: Wed, 20 Apr 2005 13:03:01 -0300
Subject: Troll? was: Re: goto statement
In-Reply-To: <d45to7$g02$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
	<d45to7$g02$1@news.tsystems.kiev.ua>
Message-ID: <d45u7f$o5u$1@sea.gmane.org>

Maxim Kasimov wrote:
> 
> by the way, "goto" statement will be useful for writing more powerful 
> obfuscators
> 
Let me get that clear: you want a goto to help with debugging.

And you want to obfuscate your code even more?

!?

Perhaps you need to write in Perl, or some other similar language.

Writing in Python is for those that seek clarity (not obfuscation) and 
less bugs.   Which is why a goto statement should definitely never be 
part of Python!

Andr?



From gry at ll.mit.edu  Thu Apr 14 09:17:28 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 14 Apr 2005 06:17:28 -0700
Subject: Inelegant
In-Reply-To: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>
References: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>
Message-ID: <1113484648.201612.249450@g14g2000cwa.googlegroups.com>

I sometimes use the implicit literal string concatenation:

def SomeFunction():
   if SomeCondition:
      MyString = 'The quick brown fox ' \
                 'jumped over the ' \
                 'lazy dog'
      print MyString

SomeFunction()
The quick brown fox jumped over the lazy dog


It looks pretty good, I think.  One could use triple quotes too, if the
string
contains quotes.

-- George



From mensanator at aol.com  Wed Apr 13 18:16:55 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 13 Apr 2005 15:16:55 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
Message-ID: <1113430615.592715.78440@f14g2000cwb.googlegroups.com>

Dan Bishop wrote:
> Dick Moores wrote:
> > I need to figure out how to compute pi to base 12, to as many
digits
> as
> > possible. I found this reference,
> <http://mathworld.wolfram.com/Base.html>,
> > but I really don't understand it well enough.
>
> How many stars are in "*************************"?
>
> You probably answered "25".  This means that, for convenience, you've
> broken down the row of stars into ********** + ********** + *****,
that
> is, 2 tens with 5 left over, which the base-10 numeral system denotes
> as "25".
>
> But there's no reason other than tradition why you should arrange
them
> into groups of 10.  For example, you could write it as ******** +
> ******** + ******** + *, or 3 eights plus 1.  In octal (base-8)
> notation, this is written as "31"; the "tens" place in octal
represents
> eights.
>
> In general, in the base-r numeral system, the nth digit to the left
of
> the ones digit represents r^n.  For example, in the binary number
> 11001, the place values for each digit are, right to left, 1, 2, 4,
8,
> and 16, so the number as a whole represents
> 1?16+1?8+0?4+0?2+1?1=16+8+1=25.  This analogous to 25=2?10+5 in
> base-10.
>
> It's also possible to write it as 3?8+0?4+0?2+1?1 = 3001 base 2,
> but by convention, base-r only uses the digits in range(r).  This
> ensures a unique represenation for each number.  This makes "11001"
the
> unique binary representation for decimal 25.
>
> Note that for bases larger than 10, the digits will be numbers that
are
> not single digits in base 10.  By convention, letters are used for
> larger digits: A=10, B=11, C=12, ... Z=35.  For example, the number
> (dec) 2005 = 1?12?+1?12?+11?12+1?1 is represented in base-12 by
> "11B1".
>
> Fractions are handled in a similar manner.  The nth place to the
right
> of the radix point (i.e., the "decimal point", but that term is
> inaccurate for bases other than ten) represents the value
radix**(-n).
>
> For example, in binary,
> 0.1 = 1/2 = dec. 0.5
> 0.01 = 1/4 = dec. 0.25
> 0.11 = 1/2 + 1/4 = 3/4 = dec. 0.75
> 0.001 = 1/8 = dec. 0.125
> 0.01010101... = 1/4 + 1/16 + 1/64 + ... = 1/3
> 0.0001100110011... = 1/10 = dec. 0.1
>
> The last row explains why Python gives:
>
> >>> 0.1
> 0.10000000000000001
>
> Most computers store floating-point numbers in binary, which doesn't
> have a finite representation for one-tenth.  The above result is
> rounded to 53 signficant bits
> (1.100110011001100110011001100110011001100110011010?2^-4), which is
> exactly equivalent to decimal
> 0.1000000000000000055511151231257827021181583404541015625, but gets
> rounded to 17 significant digits for display.
>
> Similarly, in base-12:
>
> 0.1 = 1/12
> 0.14 = 1/12 + 4/144 = 1/9
> 0.16 = 1/12 + 6/144 = 1/8
> 0.2 = 2/12 = 1/6
> 0.3 = 3/12 = 1/4
> 0.4 = 4/12 = 1/3
> 0.6 = 6/12 = 1/2
> 0.8 = 8/12 = 2/3
> 0.9 = 9/12 = 3/4
> 0.A = 10/12 = 5/6
>
> Notice that several common fractions have simpler representations in
> base-12 than in base-10.  For this reason, there are people who
believe
> that base-12 is superior to base-10.
> (http://www.dozenalsociety.org.uk)
>
> > Could someone show me how to do what I need?
>
> You'll need 3 things:
>
> (1) An algorithm for computing approximations of pi.
>
> The simplest one is 4*(1-1/3+1/5-1/7+1/9-1/11+...), which is based on
> the Taylor series expansion of 4*arctan(1).
>
> There are other, faster ways.  Search Google for them.

That one's way too slow. I found the one I use below on Mathworld.

>
> (2) An unlimited-precision numeric representation.  The standard
> "float" isn't good enough: It has only 53 bits of precision, which is
> only enough for 14 base-12 digits.
>
> The "decimal" module will probably work, although of course its
base-10
> internal representation will introduce slight inaccuracies.

I'm using GMPY (see code).

>
> (3) A function for converting numbers to their base-12
representation.

GMPY can do this also.

>
> For integers, this can be done with:
>
> DIGITS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
> def itoa(num, radix=10):
>    is_negative = False
>    if num < 0:
>       is_negative = True
>       num = -num
>    digits = []
>    while num >= radix:
>       num, last_digit = divmod(num, radix)
>       digits.append(DIGITS[last_digit])
>    digits.append(DIGITS[num])
>    if is_negative:
>       digits.append("-")
>    digits.reverse()
>    return ''.join(digits)
>
> For a floating-point number x, the representation with d "decimal"
> places count be found by taking the representation of int(round(x *
> radix ** d)) and inserting a "." d places from the right.


# better pi/2 = 1 + 1/3 + (1*2)/(3*5) + (1*2*3)/(3*5*7) + ...

import gmpy
# unlimited precision math library

def pialso(n,b):
# input number of digits (n) in requested base (b)
        p = gmpy.mpq(1,1)
        # gmpy rationals are unlimited precision
        sn = 1
        sd = 3
        c = gmpy.mpq(sn,sd)
        # create the next term to be summed
        num = gmpy.mpf(p.numer())
        # seperately convert the numerator
        den = gmpy.mpf(p.denom())
        # and denominator to gmpy floats
        f = (num/den) * 2
        # to get unlimited precision float
        olds = gmpy.fdigits(f,b,n,0,1,2)
        # extract the requested digits and do base conversion
        done = 0
        while done==0:
                p = p + c
                # sum next term of pi equation
                sn += 1
                # set numerator
                sd += 2
                # and demoniator
                c = c * gmpy.mpq(sn,sd)
                # to create term for next iteration
                num = gmpy.mpf(p.numer())
                # meanwhile, convert this iteration
                den = gmpy.mpf(p.denom())
                f = (num/den) * 2
                # to an unlimited precision float
                s = gmpy.fdigits(f,b,n,0,1,2)
                if s[0]==olds[0]:
                # we're done when the number of digits
                        done = 1
                # we want stops changing
                else:
                # otherwise, keep iterating until we reach the
                        olds = s
                # the desired convergence
        print s[0],sn
        # prints the digits and how many iterations it took
        print

"""

The first 100 digits of pi in base 10.
>>> pialso(100,10)
3141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067
327

The first 100 digits of pi in base 12.
>>> pialso(100,12)
3184809493b918664573a6211bb151551a05729290a7809a492742140a60a55256a0661a03753a3aa54805646880181a3682
353

Note it took more iterations (longer to converge) because base 12
digits are "bigger" than base 10.

"""



From mwm at mired.org  Tue Apr 26 03:54:01 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 02:54:01 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<86is2anqbj.fsf@guru.mired.org> <Xns964467144Dcastleamber@130.133.1.4>
Message-ID: <86r7gym0rq.fsf@guru.mired.org>

John Bokma <john at castleamber.com> writes:

> Mike Meyer wrote:
>
>> John Bokma <john at castleamber.com> writes:
>>> You already showed code like:
>> Actually, I never showed you this code.
> hence *like*, and yes you did, in a footnote.

Yes, but *I* didn't say like, because I wanted to point out that you
had purposely uglified it.

>> In this case, the good rewrite invokes the well-known logical operator
>> "not":
>> 
>> if not condition then
>>    something
>
> unless condition then
>     	something
>
> Weird, we use constructions like that in normal language all the time, 
> and when we program it's suddenly bloat?

If you want to program in a normal language, I recommend
COBOL. Natural languages have a different purpose than programming
languages, which are designed to communicate algorithms clearly and
concisely. In that domain, it's just bloat.

>>>>> it makes the code more readable.
>>>> Then why do most Perl programmers consider unless "! a good idea"?
>>> Reread the last part of the last sentence you quoted above.
>> I can't - in being argumentative, you neglected to include it.
> *sigh* in your obsession to call me argumentative, your skipped over it:
> "it makes the code more readable"

Let's get the facts straight here. I may have skipped over it the
first time, but I didn't call you argumentative then. It wasn't until
you argumentative until after you deleted it that I said you were
argumentative.

>> What you created was a list. Not in Python or Perl, but in English.
> I doubt if any Perl programmer in the given context would have any 
> problem with it, but lets drop it.

No, let's not. It's a perfect example of why having multiple ways to
do things is a bad idea.

>> Oh, I understood it.
> Sure, is that why you talked about a tuple? But, lets drop it.

No, I talked about a tuple to point out that doing it right made
something a machine could parse properly, with no thought at all.

>> And so far, I've only said *two* things were wrong with Perl. One is
>> that it provides more than one way to do things - which point you've
>> made for me by arguing about how you did/didn't choose the right one
>> in an example.
> If you think I gave a wrong example, give the right one. The only reason 
> for an argument was your lack of knowledge about split and map, which 
> only tells something about you, not Perl.

I already gave the right one. The one with the optional parens put
back in.

>> to a
>> scalar when you wanted a list was bad. You haven't argued that I was
>> wrong about Perl in either case.
> *sigh* if you want a list, you assign it to something that can handle a 
> list. If you assing a list to a scalar, you get the count. So if you 
> want to select items out of a list on a criteria, you use grep in a list 
> context, if you want to count the items, guess...

You still haven't argued that I'm wrong about Perl. You're arguing
about whether or not a behavior is bad, not the behavior.

Trying to argue that I'm wrong because I'm wrong about Perl's behavior
being bad would be a lot more effective if you pointed out where the
descriptions of bad behavior were incorrect.

>>> It's also a restriction. Why do you think in Java one can call the gc
>>> explicitly?
>> If it's a restriction, there must be something it restricts you from
>> doing. Care to tell me exactly what garbage collection keeps you from
>> doing?
> real time guaranteed memory allocation/deallocation (which might be 
> fixed by now in Java)

That's an implementation feature, not a language feature. That's an
implementation feature, not a language feature. I might also note that
you're wrong about alloc/free, in that you don't get real time
guaranteed memory allocation/deallocation with it, either.

Care to try again?

>>> In my case it saves time the other way around, I consider correct
>>> usage trivial, but the typing all the time...
>> I guess you haven't had to chase many bugs related to missing free's
> In my own code? I can't remember. In code written by other people: in 
> the cases they forget to free memory they did so many other things wrong 
> that I sincerly hope they have found other work by now.

I'd say you've never done anything but trivial

>> skilled programmers, and makes wrong choices painful. TMTOWTDI makes
>> wrong choices - or ugly code - easy.
> Especially if one keeps mixing up map and grep :-D

Righ - you once again avoid the real issue.

>> So the jvm implementations you're familiar with have really bad
>> garbage collectors.
> I have no idea if this has changed recently. The last thing I read about 
> it is that there are 4 kinds of garbage collection one can select in 
> Sun's implementation.

If you had enough experience with jvm's, you'd know that Sun's wasn't
the only one out ther.

>> A good programmer won't immediately abandon either
>> Java or garbage collection. They'd check out other implementations of
>> the jvm to see if one of those has a better garbage collector.
> Uhm, people often pick Java because of write once, run everywhere. So 
> that is not always, or even rarely an option.

Switching jvm's doesn't mean you switch away from Java. It means you
switch the implementation of the jvm that Java is running on. "Run
anywhere" has nothing to do with this.

>> another. There are probably others as well. You can't simply tag one
>> as "better" without knowing what the problem domain is.
> I didn't say better, what I meant: there are situations real time 
> free/alloc is prefered, unless my knowledge of gc in general is 
> outdated.

Your knowledge of free/alloc is wrong. They don't guarantee real time
behavior. Nor do they guarantee memory allocations.

I'm beginning to think your programming experience is limited.

>>> I haven't been using *foreach* for quite some time, I use *for* all
>>> the time. Which is just because I am lazy.
>> 
>> You make my case for me. You write in a subset of Perl that excludes
>> "foreach". Is that the "absolute beginner" or the "beginner" subet?
>> Or maybe it's a subset that doesn't depend on the skill level of the
>> programmer.
>
> "The foreach keyword is just a synonym for the for keyword, so you can 
>  just use foreach and for interchangeably, whichever you think is more 
>  readable in a given situation" (Programming Perl, 3rd edition, p118)

You didn't bother refuting the point that you've created a subset of
Perl which never uses "foreach".

>>>> A good programmer will compare the toolset to others he's familiar
>>>> with,
>>> which only can be done when he/she knows both (almost) equally well.
>> 
>> Nope. A quick survey of a toolset is all that's needed to make a first
>> approximation as to it's quality - to someone who's familiar with
>> enough toolsets, anyway.
> Weird: I am going study Python for at least one year. Unless you call 
> that a quick survey :-D.

That's enough time to become proficient in a language. Which isn't
required if all you want to do is decide if it's well-designed.

>> A good understanding of toolset design allows you to point out flaws
>> in a toolset without becoming intimately familiar with it. For
>> instance, mutliple nearly identical ways to express the same construct
>> is always a flaw in a toolset. Which has been the point I've been
>> making the whole time.
> So a hammer is a bad tool, since one can use a scewdriver...

I didn't say a word about bad tools.

> I always wondered why an artist, like for example a painter, has so many 
> nearly identical tools...

Because they do different things with them. while and if are nearly
identical tools - they both have a keyword, a boolean and a block of
code. But they do different things.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From rupole at hotmail.com  Mon Apr 18 21:20:11 2005
From: rupole at hotmail.com (Roger Upole)
Date: Mon, 18 Apr 2005 21:20:11 -0400
Subject: Updating Windows File Summary Data
References: <1113860278.876481.210270@z14g2000cwz.googlegroups.com>
Message-ID: <42645d94$1_1@127.0.0.1>

Pywin32 has functions to read and write these properties.
Take a look at testStorage.py in the \win32\test directory for
an example of how to use them.

           Roger

"Denrael" <learned at gmail.com> wrote in message 
news:1113860278.876481.210270 at z14g2000cwz.googlegroups.com...
>I am looking for a way in Python to update Windows File Summary
> Metadata. By that I mean the data (Title, Subject, Keywords, Comments)
> found when you right click a windows file, select properties and then
> summary. Can anyone point me in the right direction?
> 



----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
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From rpmuller at gmail.com  Fri Apr  1 17:20:51 2005
From: rpmuller at gmail.com (RickMuller)
Date: 1 Apr 2005 14:20:51 -0800
Subject: Help with splitting
Message-ID: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>

I'm trying to split a string into pieces on whitespace, but I want to
save the whitespace characters rather than discarding them.

For example, I want to split the string '1    2' into ['1','    ','2'].
I was certain that there was a way to do this using the standard string
functions, but I just spent some time poring over the documentation
without finding anything.

There's a chance I was instead thinking of something in the re module,
but I also spent some time there without luck. Could someone point me
to the right function, if it exists?

Thanks in advance.

R.



From superprad at gmail.com  Sat Apr 23 16:26:19 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 23 Apr 2005 13:26:19 -0700
Subject: Handling lists
In-Reply-To: <mailman.2355.1114287239.1799.python-list@python.org>
References: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
	<mailman.2355.1114287239.1799.python-list@python.org>
Message-ID: <1114287979.253782.61360@g14g2000cwa.googlegroups.com>

yes that makes sense.But the problem I am facing is  if list=
[300,301,303,305] I want to consider it as one cluster and include the
range as [300,305] so this is where I am missing the ranges.
so If the list has l = [300,301,302,308,401,402,403,408] i want to
include it as [[300,308],[401,408]].



From mahs at telcopartners.com  Fri Apr  8 16:03:10 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 08 Apr 2005 13:03:10 -0700
Subject: curious problem with large numbers - Due to subprocess - using
 pickle
In-Reply-To: <d36l0o$gsk$1@sea.gmane.org>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>	<mailman.1517.1112938969.1799.python-list@python.org>	<4256a676@nntp0.pdx.net>	<4256b80b.34130777@news.oz.net>	<4256b774$1@nntp0.pdx.net>	<4256c65c$1@nntp0.pdx.net>
	<d36l0o$gsk$1@sea.gmane.org>
Message-ID: <d36nsb$qcj$1@sea.gmane.org>

Michael Spencer wrote:

>>
> Problem is associated with executing iteractive input in a subprocess.
> 
>  >python idle.py -n
> 
> IDLE 1.1      ==== No Subprocess ====
>  >>> 1e10000
> 1.#INF
>  >>>
> 
> Michael
> 
> 
It seems that the culprit is pickle - used to send messages between the IDLE 
shell and the execution server.
  >>> import pickle

  >>> pickle.dumps(1e10000)
  'F1.#INF\n.'
  >>> pickle.loads(_)
  Traceback (most recent call last):
    File "<input>", line 1, in ?
    File "c:\python24\lib\pickle.py", line 1394, in loads
      return Unpickler(file).load()
    File "c:\python24\lib\pickle.py", line 872, in load
      dispatch[key](self)
    File "c:\python24\lib\pickle.py", line 968, in load_float
      self.append(float(self.readline()[:-1]))
  ValueError: invalid literal for float(): 1.#INF
  >>> import cPickle as pickle
  >>> pickle.dumps(1e10000)
  'F1.#INF\n.'
  >>> pickle.loads(_)
  Traceback (most recent call last):
    File "<input>", line 1, in ?
  ValueError: could not convert string to float
  >>>

  It seems that somewhere IDLE traps this error and shows '1.0' instead. 
However, I can't follow the IDLE output code, so I won't try to track this down 
any further

  IDLE 1.1
 >>> 2e10000
1.0
 >>> 3e10000
1.0
 >>> 100e10000
1.0
 >>> 999e1000
1.0
 >>>

Michael





From fabio.pliger at siavr.it  Wed Apr 13 09:12:41 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Wed, 13 Apr 2005 13:12:41 GMT
Subject: printing with wxPython
References: <h8Q6e.60538$zZ1.1719996@twister1.libero.it>
	<FKydnWvMkrSIasbfRVn-3g@powergate.ca>
Message-ID: <dV87e.43434$IN.789762@twister2.libero.it>

Yeah,
There are two about printing... there is also an example in the wxDemo...
but they all talk about printing text... In my case i need to print (or at
least to make a print preview) a bitmap (or a panel...)


"Peter Hansen" <peter at engcorp.com> ha scritto nel messaggio
news:FKydnWvMkrSIasbfRVn-3g at powergate.ca...
> Fabio Pliger wrote:
> > Hi!
> > I'm using wxPython to handle my application gui.. So,  I have a notebook
> > widget and i have to print the object inside it's tab ... Maybe doing a
> > preview before printing... I know that wx has many objects to handle
> > printing.. i've tryied to use them, but i wasn't able to... Any hint? By
> > now, i solved the problem saving a screenshot if the screen in an
image(bmp)
> > and then sending it to printer... (a print preview would be cool...)
> > tnx
>
> Maybe the recipes on the wxPython wiki page would
> help:
> http://wiki.wxpython.org/index.cgi/RecipesOther
>
> There are at least two dealing with "Printing".




From dh47302 at yahoo.com  Tue Apr 19 03:31:19 2005
From: dh47302 at yahoo.com (Klaus Alexander Seistrup)
Date: Tue, 19 Apr 2005 07:31:19 +0000 (UTC)
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
	<1113830286.364709.164740@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd69cu7.1ab.klaus@main.szn.dk>

Lucio Torre wrote:

> Make sure you write the expression in the lower text-area, and
> then press the send button. This should do it.

Ah, that's the trick!  It wasn't obvious that there were two text areas,
and I intuitively wrote commands at the python prompt.  Problem solved.

Say, are floats implemented?  Comparisons seem to work, but print'ing
doesn't:

#v+

>>> 1.0 > 0.5
True
>>> print 1.23
%.*g
>>> 

#v-

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From saravanand at vsnl.net  Mon Apr 25 10:14:21 2005
From: saravanand at vsnl.net (Saravanan)
Date: 25 Apr 2005 07:14:21 -0700
Subject: Python23.pdb
Message-ID: <1114438461.753620.324570@z14g2000cwz.googlegroups.com>

Hello,

1) Is is possible to get the pdb files for the Python version 2.3.3?

Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)]
on win32

2) Is there way to enable symptom collection/traces in the Python Core
modules?

Thanks in advance.

- Saravanan D



From huzaifa at hostway.com  Tue Apr 26 10:56:09 2005
From: huzaifa at hostway.com (Huzaifa Tapal)
Date: Tue, 26 Apr 2005 09:56:09 -0500
Subject: TypeError: ssl() argument 1 must be _socket.socket,
	not _socketobject
Message-ID: <426E5689.1010706@hostway.com>

I am getting this error from python 2.3.5 when making secure socket 
connections from my mod_python based application.  It is very odd 
because we cannot replicate this in the development environment, only in 
production on a cluster of 2 debian boxes with Apache2 MPM Worker w/ Mod 
Python 3.13.

Does anybody have any ideas as to what could be causing this error?

Here is the full traceback:

   Traceback:    File 
"/home/orderform/www/cgi-bin/OrderForm_bundle/hwmodules/register/dp_registrar/DPRegistrar.py", 
line 95, in _
_execCmd
       con.endheaders()
      File "/usr/lib/python2.3/httplib.py", line 715, in endheaders
       self._send_output()
      File "/usr/lib/python2.3/httplib.py", line 600, in _send_output
       self.send(msg)
      File "/usr/lib/python2.3/httplib.py", line 567, in send
       self.connect()
      File "/usr/lib/python2.3/httplib.py", line 988, in connect
       ssl = socket.ssl(sock, self.key_file, self.cert_file)
      File "/usr/lib/python2.3/socket.py", line 73, in ssl
       return _realssl(sock, keyfile, certfile)
   TypeError: ssl() argument 1 must be _socket.socket, not _socketobject

The thing is that if we restart the web server, it works fine for about 
20 minutes after which we start getting these errors.

Any help would be appreciated.

Hozi



From fuzzyman at gmail.com  Tue Apr 12 11:03:21 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 12 Apr 2005 08:03:21 -0700
Subject: Northampton, UK
Message-ID: <1113315607.375554.171070@f14g2000cwb.googlegroups.com>

Just on the off chance.... I thought I'd ask if there were any
Pythoneers out there local to Northampton UK ?

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From edcjones at comcast.net  Sun Apr 10 16:15:14 2005
From: edcjones at comcast.net (Edward C. Jones)
Date: Sun, 10 Apr 2005 16:15:14 -0400
Subject: numarray.array can be VERY slow
Message-ID: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>

Steven Bethard wrote:

 > As mentioned, this has nothing to do with numarray, and everything to
 > do with your inexplicable use of lists.  Why don't you just write this
 > as:
 >
 > arr = numarray.ones((8, 8, 256, 256), Float64)

The code I posted was simplified from a larger program which I have now 
revised. But I still ask: why did it take 4.3 seconds to run?


From mwm at mired.org  Fri Apr 22 02:05:21 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 01:05:21 -0500
Subject: python LEX
References: <d47mli$d1v$1@bagan.srce.hr>
	<mailman.2214.1114081654.1799.python-list@python.org>
Message-ID: <864qdztkgu.fsf@guru.mired.org>

Miki Tebeka <miki.tebeka at zoran.com> writes:

> Hello jozo,
>
>> I have to work on python lexical definition in Lex. I spent lots of my
>> time to find regular expresions written for Lex of Python language but
>> nothing.
>> Can somebody help me?
> http://www.antlr.org/grammar/list (search for Python)
>
> You can search in projects like Pyrex and Parrot for their parser
> implementation.

The python grammar is included with the Python sources, and is used
to build the compiler.

> HTH.

Trouble is, he wants a lexer, not a parser. The lexer in the sources
is an ad-hoc package, contained in Parser/tokenizer.c.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From flupke at nonexistingdomain.com  Sat Apr  9 13:21:46 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Sat, 09 Apr 2005 17:21:46 GMT
Subject: workaround for generating gui tools
In-Reply-To: <3bqgh6F6larilU1@individual.net>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
Message-ID: <KaU5e.60240$aM2.4497475@phobos.telenet-ops.be>

Reinhold Birkenfeld wrote:

> Have to disagree strongly.
> 
> It's evil anyway (for more complex applications) to put GUI construction
> in your code. GUI should be described appropriately in data files.
> 
> Glade does this very good, and with pygtk it's no problem to use the XML files.
> 
> Reinhold

So the GUI should be seperate from the code. Is the way i described 
valid then? Extending from the gui class and putting event handlers in 
the derived classes?
Or is there a better way to seperate the GUI from the code?

Benedict


From vze4rx4y at verizon.net  Thu Apr 14 18:08:37 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 14 Apr 2005 22:08:37 GMT
Subject: New-style classes, iter and PySequence_Check
References: <d3m795$cuq$1@epityr.hut.fi>
Message-ID: <FRB7e.14289$Xm3.2876@trndny01>

[Tuure Laurinolli]
> Someone pasted the original version of the following code snippet on
> #python today. I started investigating why the new-style class didn't
> work as expected
> classes apparently don't return true for PyInstance_Check, which causes
> a problem in PySequence_Check, since it will only do an attribute lookup
>   for instances.
>
> Things probably shouldn't be this way. Should I go to python-dev with this?

PyInstance_Check is defined as checking for instances of old style classes.
Hence, it appropriate that it does not return True for instances of new-style
classes.

PySequence_Check is pretty good shape.  In general, it is not always possible to
tell a mapping from a sequence, but the function does try to take advantage of
all available information.  In particular, it has a separate code path for
new-style instances which sometimes have additional information (i.e. dict and
its subclasses fill the tp_as_mapping->mp_subscript slot instead of the
tp_as_sequence->sq_slice slot).

Old style classes never inherit from dict, tuple, list, etc. so that slot
distinction isn't meaningful.  Accordingly, PySequence_Check simply checks to
see if an object defines __getitem__ and that check entails an attribute lookup.
The posted code snippet uses a __getattr__ gimmick to supply an affirmative
answer to that check.

The docs do not make guarantees about how iter(o) will determine whether object
o is a sequence.  Currently, it does the best it can and that entails having
different implementation logic for new-style and old-style objects as described
above.  The provided snippet uses the __getattr__ gimmick to reveal the
implementation specific behavior.  Mystery solved.

In contrast, the docs do make guarantees about explicit attribute lookup (i.e.
that an attribute lookup will actually occur and that slot checking logic will
not be substituted).  The posted snippet reveals that these guarantees are
intact for both new and old-style classes.

Knowing all of this reveals the behavior to be a feature rather than a bug -- 
the feature being that operator.IsMappingType and operator.IsSequenceType do a
remarkable job (few false positives and no false negatives) across a huge
variety of object types.  It has been tested with instances of set, int, float,
complex, long, bool, str, unicode, UserString, list, UserList, tuple, deque,
NoneType, NotImplemented, new and old style instances with and without defining
__getitem__.  Also, tested were subclasses of the above types.  The false
positives are limited to user defined classes (new or old-style) defining
__getitem__.   Since the mapping API overlaps with the sequence API, it is not
always possible to distinguish the two.

Of course, you found that it is possible to throw a monkey wrench in the process
using __getattr__ to exploit undefined, implementation specific behavior.  Don't
do that.  If a class needs to be iterable, then supply an __iter__ method.  If
that method needs to be retargeted dynamically, then
take advantage of the guarantee that iter(o) will always find a defined __iter__
method.  Perhaps, define __iter__ as lambda obj:  obj(obj.__getattr__(obj,
'__iter__')) or somesuch.  IOW, to guarantee that iter() performs an __iter__
lookup, fill the slot with something that does that lookup.


Raymond Hettinger


E = mc**2      # Einstein
E = IR         # Ohm's law
 therefore
IR = mc**2     # Raymond's grand unified theory




From bedouglas at earthlink.net  Fri Apr 22 20:33:36 2005
From: bedouglas at earthlink.net (bruce)
Date: Fri, 22 Apr 2005 17:33:36 -0700
Subject: internet explorer/firefox plugin/toolbar
Message-ID: <008201c5479c$18222b90$0301a8c0@Mesa.com>

hi...

this probably isn't the correct mailing list, but we're giving it a shot!!

does anyone have any ideas as to how to go about creating a plugin/toolbar
for both/either the IE/Firefox browsers?

We're curious as to how to do this, and what languages/technologies you'd
use to do this.. could it be done in python???

searching google didn't really turn up anything for the IE side of things...

any comments/assistance/etc would be useful...

thanks

bruce
bedouglas at earthlink.net




From __peter__ at web.de  Sun Apr  3 03:54:47 2005
From: __peter__ at web.de (Peter Otten)
Date: Sun, 03 Apr 2005 09:54:47 +0200
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
Message-ID: <d2o7g8$lc5$01$1@news.t-online.com>

Raymond Hettinger wrote:

(quoting Bengt)
>> I assumed that all standard sequence consumers (including list, of
>> course) would intercept the StopIteration of a sequence given them in the
>> form of a generator expression, so your lyst example would have an 
>> analogue for other sequence consumers as well, right? 
>> I.e., there's not a hidden list(genex) in those others I would hope ;-)
> 
> Right.

I see I followed the historical evolvement and saw generator expressions as
a lazy listcomp rather than a cool new way to write a generator. That
turned out to be the road to confusion.

Thanks Carl, thanks Raymond for setting me straight.

> I would call it an unfortunate assymmetry -- one the never comes up unless
> you're up to no good ;-)

Do you see any chance that list comprehensions will be redefined as an
alternative spelling for list(<generator expression>)?

Peter



From zanesdad at bellsouth.net  Thu Apr 14 16:41:45 2005
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Thu, 14 Apr 2005 16:41:45 -0400
Subject: SimpleXMLRPCServer - disable output
In-Reply-To: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>
References: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>
Message-ID: <425ED589.7090209@bellsouth.net>

codecraig wrote:

>Hi,
>  I thought I posted this, but its been about 10min and hasnt shown up
>on the group.
>  Basically I created a SimpleXMLRPCServer and when one of its methods
>gets called and it returns a response to the client, the server prints
>some info out to the console, such as,
>
>localhost - - [14/Apr/2005 16:06:28] "POST /RPC2 HTTP/1.0" 200 -
>
>Anyhow, is there a way I can surpress that so its not printed to the
>console? I looked at SimpleXMLRPCServer.py ...it doesn't explicitly
>print that, I think perhaps std is...but not sure.   Any ideas??
>
>thanks.
>
>  
>
Here's the entire SimpleMLRPCServer class from SimpleXMLRPCServer.py:


class SimpleXMLRPCServer(SocketServer.TCPServer,
                         SimpleXMLRPCDispatcher):
    """Simple XML-RPC server.

    Simple XML-RPC server that allows functions and a single instance
    to be installed to handle requests. The default implementation
    attempts to dispatch XML-RPC calls to the functions or instance
    installed in the server. Override the _dispatch method inhereted
    from SimpleXMLRPCDispatcher to change this behavior.
    """

    def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
                 logRequests=1):
        self.logRequests = logRequests

        SimpleXMLRPCDispatcher.__init__(self)
        SocketServer.TCPServer.__init__(self, addr, requestHandler)

You should be able to change logRequests to 0 and that should fix it.  I just tested it at a prompt and it worked just fine.


Jeremy Jones



From steve at holdenweb.com  Tue Apr 12 03:31:00 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 03:31:00 -0400
Subject: web authoring tools
In-Reply-To: <Xns9635B27CBB14Evaneveryindiegamedes@207.69.189.191>
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>	<Xns96356AFD03D32vaneveryindiegamedes@207.69.189.191>	<mailman.1671.1113204815.1799.python-list@python.org>	<op.so2yz4blqfv3if@localhost>
	<Xns9635B27CBB14Evaneveryindiegamedes@207.69.189.191>
Message-ID: <d3ft9a$q91$1@sea.gmane.org>

Brandon J. Van Every wrote:
> =?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?= <peufeu at free.fr> wrote in
> news:op.so2yz4blqfv3if at localhost: 
> 
> 
>>>>>Ideally, I would like an open source website + html design tool
>>>>>implemented in Python
>>>>
>>>>didn't you just say that ideally, you wanted a tool written in lisp
>>>>or scheme?
>>>
>>>I honestly got a little tired of the tone of the answers I was
>>>getting from that crowd, about what an idiot I am.  My query there is
>>>still 
>>
>>     You mean you are interested in a web application programming
>>     framework in  
>>the spirit of Seaside, or in a HTML/CSS editor in the spirit of  
>>Dreamweaver ?
> 
> 
> I believe Dreamweaver-esque.  I see myself writing articles and eventually 
> doing snazzy eye candy layouts.  I do not see myself engaging in elaborate 
> flow control or anything terribly programmatic.  I want to concentrate on 
> the content, not the mechanism.
> 
> 
I've stayed out of this one so far because of a natural disinclination 
to join religious discussions, but sine we are now talking good common 
sense I'd like to ask whether a *batch-oriented* system for folding 
database content into a static web site with common look-and-feel would 
be of interest.

Now PyCon is over I've been able to blog about the techniques used to 
generate the web site at http://www.holdenweb.com/, and most recently 
about using reStructured Text in the database to ease authorship 
problems for the less-taxing content. See

http://www.holdenweb.com/blogs/2005/04/versioned-reviews-implemented-post.html

to determine whether the overall approach would work for you.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From cweimann at k12hq.com  Mon Apr  4 17:47:43 2005
From: cweimann at k12hq.com (Christopher Weimann)
Date: Mon, 4 Apr 2005 17:47:43 -0400
Subject: re module non-greedy matches broken
In-Reply-To: <1152q99c7pjjl04@corp.supernews.com>
References: <d2qnf5$a1b$1@news.web.de> <1152q99c7pjjl04@corp.supernews.com>
Message-ID: <20050404214743.GF82152@tektite.k12usa.internal>

On 04/04/2005-04:20PM, lothar wrote:
> 
> how then, do i specify a non-greedy regex
>   <1st-pat><not-1st-pat>*?<follow-pat>
> 
> that is, such that non-greedy part <not-1st-pat>*?
> excludes a match of <1st-pat>
> 

jet% cat vwre2.py
#! /usr/bin/env python

import re

vwre = re.compile("V[^V]W")
vwlre = re.compile("V[^V]WL")

if __name__ == "__main__":

  newdoc = "V1WVVV2WWW"
  vwli = re.findall(vwre, newdoc)
  print "vwli[], expect", ['V1W', 'V2W']
  print "vwli[], return", vwli

  newdoc = "V1WLV2WV3WV4WLV5WV6WL"
  vwlli = re.findall(vwlre, newdoc)
  print "vwlli[], expect", ['V1WL', 'V4WL', 'V6WL']
  print "vwlli[], return", vwlli

jet% ./vwre2.py
vwli[], expect ['V1W', 'V2W']
vwli[], return ['V1W', 'V2W']
vwlli[], expect ['V1WL', 'V4WL', 'V6WL']
vwlli[], return ['V1WL', 'V4WL', 'V6WL']



From jstroud at mbi.ucla.edu  Sun Apr 24 13:26:42 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 24 Apr 2005 10:26:42 -0700
Subject: Rudeness on this list [Re: rudeness was: Python licence again]
In-Reply-To: <20050424135926.GA24384@phenix.progiciels-bpi.ca>
References: <mailman.2308.1114200498.1799.python-list@python.org>
	<d4fte8$sa1$1@gemini.csx.cam.ac.uk>
	<20050424135926.GA24384@phenix.progiciels-bpi.ca>
Message-ID: <200504241026.42684.jstroud@mbi.ucla.edu>

On Sunday 24 April 2005 06:59 am, so sayeth Fran?ois Pinard:
> As seen from here, the Python mailing list quality has been degrading
> significantly for the last half-year or so.

That's funny. That's exactly as long as I've been on this list. I wonder if 
the correlation is causal?

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

http://www.jamesstroud.com/


From roy at panix.com  Mon Apr  4 10:21:03 2005
From: roy at panix.com (Roy Smith)
Date: 4 Apr 2005 10:21:03 -0400
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07>
	<Sd6dnU9B46Le38zfRVn-uA@powergate.ca>
Message-ID: <d2rigf$sjj$1@panix2.panix.com>

Peter Hansen  <peter at engcorp.com> wrote:
>It seems possible to me that I might have helped him
>solely by pointing out that unittest might not be so
>"heavy" as some people claimed.  I got the impression
>that he might be swayed by some unfounded claims not
>even to look further at unittest, which I felt would
>be a bad thing.

I'm the "him" referred to above.  I've been using unittest ever since
it was first added to the standard library (actually, now that I think
about it, I believe I may have been using it even before then).

And yes, I think unittest brings along a certain amount of baggage.
There is something attractive about having the same basic framework
work in many languages (PyUnit, JUnit, C++Unit, etc), but on the other
hand, it does add ballast.  I use it, I certainly don't hate it, but
on the other hand, there are enough things annoying about it that it's
worth investing the effort to explore alternatives.

>From the few days I've been playing with py.test, I think I like what
I see, but it's got other issues.  The "optimization elides assert"
issue we've been talking about is one.

It's also neat that I can write unittest-style test classes or go the
simplier route of just writing static test functions, but there's a
certain amount of TIMTOWTDI (did I spell that right?) smell to that.

I'm also finding the very terse default output from unittest (basicly
a bunch of dots followed by "all N tests passed") highly preferable to
py.test's verbosity.

In short, I haven't made up my mind yet, but I do appreciate the input
I've gotten.




From radam2 at tampabay.rr.com  Tue Apr  5 14:59:32 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 18:59:32 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
	<mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
	<42506757.1010404@v.loewis.de>
	<e3s051p1dfqag3ph7h5f3292294lelk18p@4ax.com>
	<4251fba7.328610657@news.oz.net>
Message-ID: <0d9551t2ulpdihk2v1vo2dqi53ltoqoitv@4ax.com>

On Tue, 05 Apr 2005 06:52:58 GMT, bokr at oz.net (Bengt Richter) wrote:

>>Ok, yes, besides the globals, but I figured that part is obvious so I
>>didn't feel I needed to mention it.  The function call works the same
>>even though they are not nested functions.
>
>I am afraid that is wrong. But be happy, this may be the key to what ISTM
>is missing in your concept of python functions ;-)

The expression in the form of "function(args)(args)" is the same
pattern in two "different" cases, which was all that I was trying to
say.  Not that the exact process of the two different cases were the
same. 

>So, no, it does not "work the same." In fact, it is a misconception to talk about
>a nested fee as if it existed ready to call in the same way as foo. It doesn't
>exist that way until the fee def is EXECUTED, producing the callable fee.

Ok, I'm going to have to be more careful in how I phrase things I
think, I tend to over-genralize a bit. I said they were "the same",
but meant similar, a mistake in wording, but not in my understanding. 

But this is a good point. In my example the calling expression does
not yet know who the next tuple of arguments will go to until foo
returns it. That part is the same, but as you point out in a nested
scope foo defines fee then returns it. And in the non nested example
fee is already defined before foo is called.  And they must use
globals to communicate because they are not share the same name space.
They differ because fee is temporary, in the nested version, only
existing until the expression foo(arg)(arg) is evaluated.  It never
gets assigned a name in foo's parent name space. Do I have that
correct?


>We can use dis to see the above clearly:

Love the byte code walk through, Thanks.  Is there a resource that
goes in depth on python byte code and the compiler?  I haven't been
able to find much on it on google.

> >>> import time
> >>> def globalfun(): return '[%s]'%time.ctime()
> ...
> >>> foo()
> <function fee at 0x02EF802C>
> >>> foo()(111, 222)
> (111, 222)
> >>> foo()(333)
> (333, '[Mon Apr 04 22:31:23 2005][Mon Apr 04 22:31:23 2005]')
> >>> foo()(333)
> (333, '[Mon Apr 04 22:31:37 2005][Mon Apr 04 22:31:37 2005]')

I like your idea of using time stamps to trace code! :)


>[...]
>>Today I believe I have the correct view as I've said this morning. I
>>could be wrong yet again. I hope not though I might have to give up
>>programming. :/
>Don't give up. It would be boring if it were all instantly clear.
>The view is better after an enjoyable hike, and some of the flowers
>along the way may turn out prettier than whatever the vista at the
>top may be ;-)

I won't give up, at most I would take a break, but I love programming
too much to give it up.  ;-)


>Maybe the above will help make functions and decorators a little easier
>to understand.

I understand functions, sometimes it's difficult to describe just what
it is I don't understand yet, and sometimes I fool myself by jumping
to an invalid conclusion a little too quickly.  But I do this for
enjoyment and learning, so I'm not constrained by the need to not make
mistakes, (those are just part of learning in my oppinion), as I would
if my job depended on it.  However it's a little frustrating when my
inability to write well, gets in the way of expressing myself
accurately.

But a few questions remain...

When a @decorator statement is found, How does the compiler handle it?

Let me see if I can figure this out...using dis. :)

>>> from dis import dis
>>> def deco1(d1): return d1

>>> def func1(f1):
	@deco1
	def func2(f2):
		return f2
	return func2(f1)

>>> func1(2)
2

>>> dis(deco1)
  1           0 LOAD_FAST                0 (d1)
              3 RETURN_VALUE        
>>> dis(func1)
  2           0 LOAD_GLOBAL              0 (deco1)
              3 LOAD_CONST               1 (<code object func2 at
00B45CA0, file "<pyshell#11>", line 2>)
              6 MAKE_FUNCTION            0
              9 CALL_FUNCTION            1
             12 STORE_FAST               1 (func2)

  5          15 LOAD_FAST                1 (func2)
             18 LOAD_FAST                0 (f1)
             21 CALL_FUNCTION            1
             24 RETURN_VALUE        

I'm not sure how to interpret this... Line 5 and below is the return
expression. The part above it is the part I'm not sure about.

Is the first CALL_FUNCTION calling deco1 with the result of the
defined functions reference, as it's argument? Then storing the result
of deco1 with the name func2?

If so the precompiler/parser is replacing the @deco1 with a call to
the deco1 function like this.

    deco1( (def func2(f2):return f2) )

But this causes an illegal syntax error on the def statement. So you
can't do it directly. Or is there yet another way to view this? :)

Cheers,
Ron

 


From srijit at yahoo.com  Sat Apr  2 11:13:09 2005
From: srijit at yahoo.com (Srijit Kumar Bhadra)
Date: 2 Apr 2005 08:13:09 -0800
Subject: Example Code : Shared Memory with Mutex (pywin32 and ctypes)
Message-ID: <1112458389.683375.274990@g14g2000cwa.googlegroups.com>

Hello,
Here is some sample code with pywin32 build 203 and ctypes 0.9.6.

Best regards,
/Srijit

File: SharedMemCreate_Mutex_win32all.py

# This application should be used with SharedMemAccess_Mutex_ctypes.py
or SharedMemAccess_Mutex_win32all.py
#~ a) Creates a shared memory
#~ b) Creates or Opens a mutex
#~ c) Reads the contents (null terminated string) of shared memory
#~ d) Acquires a mutex and then writes a null terminated string to the
shared memory
#~ e) Sleeps upto 2 seconds. Sleep time is generated by a random number
#~ f) Repeats steps (c), (d) and (e) indefintely

import mmap, random, time
import win32event, pywintypes, win32api

def main():
    SHMEMSIZE = 256

    ERROR_ALREADY_EXISTS = 183

    szName = "MyFileMappingObject"
    szMsg1 = "Message from first process using win32all and mmap - "
    szMutex = "MyMutexObject"

    shmem = mmap.mmap(0, SHMEMSIZE, szName, mmap.ACCESS_WRITE)

    try:
        hMutex = win32event.CreateMutex(None, pywintypes.FALSE,
szMutex)
        if (win32api.GetLastError() == ERROR_ALREADY_EXISTS):
                print"Opened existing mutex object", szMutex
        else:
            print "Created new mutex"

        i=0
        random.seed()
        while 1:
            szMsg1 = szMsg1 + hex(i) + "\0"
            if (len(szMsg1) > SHMEMSIZE):
                print "Current size of string message is", len(szMsg1),
"and greater than", SHMEMSIZE
                break
            shmem_read = shmem.read(SHMEMSIZE)
            shmem_read = shmem_read.rstrip(chr(0))
            shmem_read = shmem_read.rstrip(" ")
            print "RECEIVED from SECOND Process: ", shmem_read
            shmem.seek(0)
            wait_result = win32event.WaitForSingleObject(hMutex, 1000)
            if (wait_result == win32event.WAIT_OBJECT_0):
                shmem.write(szMsg1)
                while (shmem.tell() != SHMEMSIZE):
                    shmem.write_byte(" ")
                shmem.seek(0)
                print "WROTE in FIRST process: ", szMsg1
                win32event.ReleaseMutex(hMutex)
            elif(wait_result == win32event.WAIT_TIMEOUT):
                 print "COULD NOT ACQUIRE MUTEX. TIMEOUT OCCURED"
            elif (wait_result == win32event.WAIT_ABONDONED):
                 print "WAIT ABANDONED"
            i = i + 1
            szMsg1 = "Message from first process using win32all and
mmap - "
            time.sleep(random.random()*2)

    except pywintypes.error, (errno, object, strerror):
            print "Error in", object, ":", strerror

if __name__ == "__main__":
    main()


File: SharedMemCreate_Mutex_ctypes.py

# This application should be used with SharedMemAccess_Mutex_ctypes.py
or SharedMemAccess_Mutex_win32all.py
#~ a) Creates a shared memory
#~ b) Creates or Opens a mutex
#~ c) Reads the contents (null terminated string) of shared memory
#~ d) Acquires a mutex and then writes a null terminated string to the
shared memory
#~ e) Sleeps upto 2 seconds. Sleep time is generated by a random number
#~ f) Repeats steps (c), (d) and (e) indefintely


# There are two options to implement this code - Option A or Option B.
If Option B(A) is chosen then
# Option A(B) should be commented.
import random, time
from ctypes import *

def main():
    try:
        SHMEMSIZE = 256

        TRUE = 1
        FALSE = 0
        ERROR_ALREADY_EXISTS = 183
        FILE_MAP_ALL_ACCESS = 0xF001F
        WAIT_OBJECT_0 = 0
        WAIT_TIMEOUT = 0x102
        WAIT_ABANDONED = 0x80
        PAGE_READWRITE = 0x04
        INVALID_HANDLE_VALUE = 0xFFFFFFFF

        szName = "MyFileMappingObject"
        szMsg1 = "Message from first process using ctypes - "
        szMutex = "MyMutexObject"

        hMutex = windll.kernel32.CreateMutexA(None, FALSE, szMutex)
        if (hMutex == 0):
            raise WinError()
        elif (windll.kernel32.GetLastError() == ERROR_ALREADY_EXISTS):
            print"Opened existing mutex object", szMutex
        else:
            print "Created new mutex"

        hMap = windll.kernel32.CreateFileMappingA(INVALID_HANDLE_VALUE,
None, PAGE_READWRITE, 0, SHMEMSIZE, szName)
        if (hMap == 0):
            print "Could not open file mapping object"
            raise WinError()

        MapViewOfFile = windll.kernel32.MapViewOfFile
        MapViewOfFile.restype = POINTER(c_char) # Option A
        pBuf = MapViewOfFile(hMap, FILE_MAP_ALL_ACCESS, 0, 0, 0)
        if (pBuf == 0):
            raise WinError()

        i=0
        random.seed()
        while 1:
            szMsg1 = szMsg1 + hex(i) + "\0"
            pBuf_str = cast(pBuf, c_char_p) # Option A
            if (len(szMsg1) > SHMEMSIZE):
                print "Current size of string message is", len(szMsg1),
"and greater than", SHMEMSIZE
                break
            print "RECEIVED from SECOND Process: ", pBuf_str.value #
Option A
            #~ print "RECEIVED from SECOND Process: ", string_at(pBuf)
# Option B
            wait_result = windll.kernel32.WaitForSingleObject(hMutex,
1000)
            if (wait_result == WAIT_OBJECT_0):
                memset(pBuf, ord(" "), SHMEMSIZE)
                cdll.msvcrt.strcpy(pBuf_str, szMsg1) # Option A
                #~ cdll.msvcrt.strcpy(pBuf, szMsg1) # Option B
                print "WROTE in FIRST process: ", szMsg1
                release_mutex = windll.kernel32.ReleaseMutex(hMutex)
                if (release_mutex == 0):
                    print "CANNOT RELEASE ACQUIRED MUTEX"
            elif(wait_result == WAIT_TIMEOUT):
                 print "COULD NOT ACQUIRE MUTEX. TIMEOUT OCCURED"
            elif (wait_result == WAIT_ABONDONED):
                 print "WAIT ABANDONED"
            i = i + 1
            szMsg1 = "Message from first process using ctypes - "
            time.sleep(random.random()*2)

        windll.kernel32.UnmapViewOfFile(pBuf)
        windll.kernel32.CloseHandle(hMap)
        return
    except WindowsError, (strerror):
        print strerror
        if (pBuf != 0):
            windll.kernel32.UnmapViewOfFile(pBuf)
        if (hMap != 0):
            windll.kernel32.CloseHandle(hMap)
        return

if __name__ == "__main__":
    main()


File : SharedMemAccess_Mutex_win32all.py

# This application should be used with SharedMemCreate_Mutex_ctypes.py
or SharedMemCreate_Mutex_win32all.py
#~ a) Opens an existing shared memory
#~ b) Opens an existing mutex
#~ c) Reads the contents (null terminated string) of shared memory
#~ d) Acquires a mutex and then writes a null terminated string to the
shared memory
#~ e) Sleeps upto 2 seconds. Sleep time is generated by a random number
#~ f) Repeats steps (c), (d) and (e) indefintely

import mmap, random, time
import win32event, pywintypes

def main():
    SHMEMSIZE = 256

    STANDARD_RIGHTS_REQUIRED = 0xF0000
    SYNCHRONIZE = 0x100000
    MUTANT_QUERY_STATE = 0x1

    MUTEX_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE |
MUTANT_QUERY_STATE

    szName = "MyFileMappingObject"
    szMsg1 = "Message from second process using win32all and mmap - "
    szMutex = "MyMutexObject"

    shmem = mmap.mmap(0, SHMEMSIZE, szName, mmap.ACCESS_WRITE)
    try:
        hMutex = win32event.OpenMutex(MUTEX_ALL_ACCESS,
pywintypes.FALSE, szMutex)
        print"Opened existing mutex object", szMutex
        i = 0;
        random.seed()
        while 1:
            szMsg1 = szMsg1 + hex(i) + "\0"
            if (len(szMsg1) > SHMEMSIZE):
                print "Current size of string message is", len(szMsg1),
"and greater than", SHMEMSIZE
                break
            shmem_read = shmem.read(SHMEMSIZE)
            shmem_read = shmem_read.rstrip(chr(0))
            shmem_read = shmem_read.rstrip(" ")
            print "RECEIVED from FIRST Process: ", shmem_read
            shmem.seek(0)
            wait_result = win32event.WaitForSingleObject(hMutex, 1000)
            if (wait_result == win32event.WAIT_OBJECT_0):
                shmem.write(szMsg1)
                while (shmem.tell() != SHMEMSIZE):
                    shmem.write_byte(" ")
                shmem.seek(0)
                print "WROTE in SECOND process: ", szMsg1
                win32event.ReleaseMutex(hMutex)
            elif(wait_result == win32event.WAIT_TIMEOUT):
                 print "COULD NOT ACQUIRE MUTEX. TIMEOUT OCCURED"
            elif (wait_result == win32event.WAIT_ABONDONED):
                 print "WAIT ABANDONED"
            i = i + 1
            szMsg1 = "Message from second process using win32all and
mmap - "
            time.sleep(random.random()*2)
    except pywintypes.error, (errno, object, strerror):
        print "Error in", object, ":", strerror

    shmem.close()
    return


if __name__ == "__main__":
    main()


File: SharedMemAccess_Mutex_ctypes.py

# This application should be used with SharedMemCreate_Mutex_ctypes.py
or SharedMemCreate_Mutex_win32all.py
#~ a) Opens an existing shared memory
#~ b) Opens an existing mutex
#~ c) Reads the contents (null terminated string) of shared memory
#~ d) Acquires a mutex and then writes a null terminated string to the
shared memory
#~ e) Sleeps upto 2 seconds. Sleep time is generated by a random number
#~ f) Repeats steps (c), (d) and (e) indefintely


# There are two options to implement this code - Option A or Option B.
If Option B(A) is chosen then
# Option A(B) should be commented.
import random, time
from ctypes import *

def main():

    SHMEMSIZE = 256

    FILE_MAP_ALL_ACCESS = 0xF001F
    STANDARD_RIGHTS_REQUIRED = 0xF0000
    SYNCHRONIZE = 0x100000
    MUTANT_QUERY_STATE = 0x1
    MUTEX_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE |
MUTANT_QUERY_STATE
    WAIT_OBJECT_0 = 0
    WAIT_TIMEOUT = 0x102
    WAIT_ABANDONED = 0x80
    TRUE = 1
    FALSE = 0

    szName = "MyFileMappingObject"
    szMsg1 = "Message from second process using ctypes - "
    szMutex = "MyMutexObject"

    hMap = 0
    pBuf = 0
    hMutex = 0

    try:
        hMap = windll.kernel32.OpenFileMappingA(FILE_MAP_ALL_ACCESS,
FALSE, szName)
        if (hMap == 0):
            raise WinError()

        MapViewOfFile = windll.kernel32.MapViewOfFile
        MapViewOfFile.restype = POINTER(c_char) # Option A
        pBuf = MapViewOfFile(hMap, FILE_MAP_ALL_ACCESS, 0, 0, 0)
        if (pBuf == 0):
            raise WinError()

        hMutex = windll.kernel32.OpenMutexA(MUTEX_ALL_ACCESS, FALSE,
szMutex)
        if (hMutex == 0):
            raise WinError()
        else:
            print"Opened existing mutex object", szMutex

        i=0
        random.seed()
        while 1:
            szMsg1 = szMsg1 + hex(i) + "\0"
            pBuf_str = cast(pBuf, c_char_p) # Option A
            if (len(szMsg1) > SHMEMSIZE):
                print "Current size of string message is", len(szMsg1),
"and greater than", SHMEMSIZE
                break
            print "RECEIVED from FIRST Process: ", pBuf_str.value #
Option A
            #~ print "RECEIVED from FIRST Process: ", string_at(pBuf) #
Option B
            wait_result = windll.kernel32.WaitForSingleObject(hMutex,
1000)
            if (wait_result == WAIT_OBJECT_0):
                memset(pBuf, ord(" "), SHMEMSIZE)
                cdll.msvcrt.strcpy(pBuf_str, szMsg1) # Option A
                #~ cdll.msvcrt.strcpy(pBuf, szMsg1) # Option B
                print "WROTE in SECOND process: ", szMsg1
                release_mutex = windll.kernel32.ReleaseMutex(hMutex)
                if (release_mutex == 0):
                    print "CANNOT RELEASE ACQUIRED MUTEX"
            elif(wait_result == WAIT_TIMEOUT):
                 print "COULD NOT ACQUIRE MUTEX. TIMEOUT OCCURED"
            elif (wait_result == WAIT_ABONDONED):
                 print "WAIT ABANDONED"
            i = i + 1
            szMsg1 = "Message from second process using ctypes - "
            time.sleep(random.random()*2)

        windll.kernel32.UnmapViewOfFile(pBuf)
        windll.kernel32.CloseHandle(hMap)
        return
    except WindowsError, (strerror):
        print strerror
        if (pBuf != 0):
            windll.kernel32.UnmapViewOfFile(pBuf)
        if (hMap != 0):
            windll.kernel32.CloseHandle(hMap)
        return
        
if __name__ == "__main__":
    main()



From mefjr75 at hotmail.com  Sun Apr 17 00:54:29 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 16 Apr 2005 21:54:29 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
Message-ID: <1113713669.255207.39580@f14g2000cwb.googlegroups.com>

Thanks Jean,
I have thought about adding docstrings several times, but I was stumped
at how to determine a docstring from a regular tripleqoted string ;)
I have been thinking hard about the problem and I think I have an idea.
If the line has nothing before the start of the string it must be a
docstring.
Sounds simple enough but in Python there are 12 or so 'types' of
strings .
Here is my crack at it feel free to improve it ;)
I reversed  the logic on the comments and docstrings so I could add a
special mode to docstring stripping ...pep8 mode .
Pep8 mode only strips double triple quotes from your source code
leaving the offending single triple quotes behind. Probably just stupid
but someone might find it usefull.
 ######################################################################
# Python source stripper
######################################################################

import os
import sys
import token
import keyword
import StringIO
import tokenize
import traceback
__credits__ = '''
J?rgen Hermann
M.E.Farmer
Jean Brouwers
'''
__version__ = '.8'
__author__ = 'M.E.Farmer'
__date__ =  'Apr 16, 2005,' \
            'Jan 15 2005,' \
            'Oct 24 2004' \


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

class Stripper:
    """Python source stripper
    """
    def __init__(self, raw):
        self.raw = raw

    def format(self, out=sys.stdout, comments=0, docstrings=0,
                spaces=1, untabify=1, eol='unix'):
        """ strip comments,
            strip docstrings,
            strip extra whitespace and lines,
            convert tabs to spaces,
            convert EOL's in Python code.
        """
        # Store line offsets in self.lines
        self.lines = [0, 0]
        pos = 0
        # Strips the first blank line if 1
        self.lasttoken = 1
        self.temp = StringIO.StringIO()
        self.spaces = spaces
        self.comments = comments
        self.docstrings = docstrings

        if untabify:
           self.raw = self.raw.expandtabs()
        self.raw = self.raw.rstrip()+' '
        self.out = out

        # Have you ever had a multiple line ending script?
        # They can be nasty so lets get them all the same.
        self.raw = self.raw.replace('\r\n', '\n')
        self.raw = self.raw.replace('\r', '\n')
        self.lineend = '\n'

        # Gather lines
        while 1:
            pos = self.raw.find(self.lineend, pos) + 1
            if not pos: break
            self.lines.append(pos)

        self.lines.append(len(self.raw))
        self.pos = 0

        # Wrap text in a filelike object
        text = StringIO.StringIO(self.raw)

        # Parse the source.
        ## Tokenize calls the __call__
        ## method for each token till done.
        try:
            tokenize.tokenize(text.readline, self)
        except tokenize.TokenError, ex:
            traceback.print_exc()

        # Ok now we write it to a file
        # but we also need to clean the whitespace
        # between the lines and at the ends.
        self.temp.seek(0)

        # All this should be written into the
        # __call__ method just haven't yet...

        # Mac CR
        if eol == 'mac':
           self.lineend = '\r'
        # Windows CR LF
        elif eol == 'win':
           self.lineend = '\r\n'
        # Unix LF
        else:
           self.lineend = '\n'

        for line in self.temp.readlines():
            if spaces == -1:
                self.out.write(line.rstrip()+self.lineend)
            else:
                if not line.isspace():
                    self.lasttoken=0
                    self.out.write(line.rstrip()+self.lineend)
                else:
                    self.lasttoken+=1
                    if self.lasttoken<=self.spaces and self.spaces:
                        self.out.write(self.lineend)

    def __call__(self, toktype, toktext,
                 (srow,scol), (erow,ecol), line):
        """ Token handler.
        """
        # calculate new positions
        oldpos = self.pos
        newpos = self.lines[srow] + scol
        self.pos = newpos + len(toktext)

        # kill comments
        if self.comments:
            if toktype == tokenize.COMMENT:
                return

        # kill doc strings
        if self.docstrings:
            # Assume if there is nothing on the
            # left side it must be a docstring
            if toktype == tokenize.STRING and \
                line.lstrip(' rRuU')[0] in ["'",'"']:
                t = toktext.lstrip('rRuU')
                if (t.startswith('"""') and
                    (self.docstrings == 'pep8' or
                     self.docstrings =='8')):
                     return
                elif t.startswith('"""') or t.startswith("'''"):
                     return

        # handle newlines
        if toktype in [token.NEWLINE, tokenize.NL]:
            self.temp.write(self.lineend)
            return

        # send the original whitespace
        if newpos > oldpos:
            self.temp.write(self.raw[oldpos:newpos])

        # skip indenting tokens
        if toktype in [token.INDENT, token.DEDENT]:
            self.pos = newpos
            return

       # send text to the temp file
        self.temp.write(toktext)
        return
######################################################################

def Main():
    import sys
    if sys.argv[1]:
        filein = open(sys.argv[1]).read()
        Stripper(filein).format(out=sys.stdout,
                 comments=0, docstrings=1, untabify=1, eol='win')
######################################################################

if __name__ == '__main__':
    Main()



From jfouhy at paradise.net.nz  Tue Apr 26 18:59:18 2005
From: jfouhy at paradise.net.nz (jfouhy at paradise.net.nz)
Date: 26 Apr 2005 15:59:18 -0700
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
Message-ID: <1114556358.676481.16500@o13g2000cwo.googlegroups.com>

Maxim Kasimov wrote:
> > Maxim Kasimov <kasimov at i.com.ua> writes:
> >>WOW, just greate! ... but i'd like to relax at some more
> >>interesting way than to comment each of rows
> but what if i just can't to do this becouse i'm working thrue ssh,
and have to
> use only installed editors (such as vi)

A slightly less arcane way of commenting out multiple lines in vi:

To comment out the current line, and the next 5:

:,+5s/^/#/

explanation:

:x,y -- specifies a line range.  If x is omitted, start with the
current line.  If y is +z, interpret it as z lines below the current
line.

^ -- regular expression matching the start of the line.

s/foo/bar/  -- replace foo with bar.

so s/^/#/ replaces the start of the line with the # character.

You can undo this with :,+5s/^#// which replaces a # at the start of
the line with the empty string (ie: deletes it).

HTH.

-- 
John.



From seefeld at sympatico.ca  Tue Apr 12 17:36:30 2005
From: seefeld at sympatico.ca (Stefan Seefeld)
Date: Tue, 12 Apr 2005 17:36:30 -0400
Subject: Missing Module when calling 'Import' _omnipy
In-Reply-To: <1113336595.556003.196620@z14g2000cwz.googlegroups.com>
References: <1113258389.432002.323790@f14g2000cwb.googlegroups.com>
	<425AC803.70704@sympatico.ca>
	<1113336595.556003.196620@z14g2000cwz.googlegroups.com>
Message-ID: <2J_6e.3363$MZ2.588132@news20.bellglobal.com>

gerald.maher at waytohere.com wrote:

> I found the fike _omnipy.pyd is that what you mean?

yep.

> Here is my Lib Path:

[...]

As a first step you may consider adding the directory containing '_omnipy.pyd'
to your PYTHONPATH variable. Second, you may read any documentation you can
find at http://omniorb.sourceforge.net/, and finally ask any unanswered question
on the omniORB ML.
Sorry, it has been a long while since I last used omniORB.

Regards,
		Stefan


From enjoy_linux at hotmail.com  Thu Apr 14 02:03:00 2005
From: enjoy_linux at hotmail.com (MaHahaXixi)
Date: Thu, 14 Apr 2005 14:03:00 +0800
Subject: how to explain such codes, python's bug or mine?
References: <d3iqhe$1s0l$1@mail.cn99.com> <d3irjm$msg$1@scotsman.ed.ac.uk>
Message-ID: <d3l1b5$2gbi$1@mail.cn99.com>

yes. i understand now.
but i use another trick.
list is in vary size, so i do not wanna copy it.
"Jim" <jbo at cannedham.ee.ed.ac.uk> wrote in message
news:d3irjm$msg$1 at scotsman.ed.ac.uk...
> MaHahaXixi wrote:
> >>>>j = range(20)
> >>>>print j
> >
> > [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
> >
> >>>>for k in j:
> >
> >  if k <= 10:
> >   j.remove(k)
> >
> >
> >
> >>>>print j
> >
> > [1, 3, 5, 7, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19]
> >
> >
> >
> > Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
> > win32
> > Type "copyright", "credits" or "license()" for more information.
> >
> > i think python do convert there codes to such style:
> > for (i = 0; i < len(j); i++)
> >    k = j[i]
> >    ......
>
> > what do u think?
> >
> >
>
> I'm not quite sure of your question but with the second style you're not
> attempting to change the original list but make a copy. That's perfectly
> easy to do in Python as it is. The exampmle is a cautionary one about
> changing the list on which you are iterating.
>
> Jim




From tzot at sil-tec.gr  Tue Apr 26 04:58:29 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 26 Apr 2005 11:58:29 +0300
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
	<uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
	<xImdnW33JJiov_DfRVn-iw@powergate.ca>
Message-ID: <2d0s61pt0i1isc2sh42sii894hu2u57gv7@4ax.com>

On Mon, 25 Apr 2005 13:00:51 -0400, rumours say that Peter Hansen
<peter at engcorp.com> might have written:

>Peter Hansen wrote:
>> Dennis Lee Bieber wrote:
>>> On Mon, 25 Apr 2005 17:24:36 +0300, Christos "TZOTZIOY" Georgiou:
>>>> I don't know any related myth of anglo-saxon origin to quote.

>>>     The most commonly known phrasing would likely be "God only helps
>>> those who help themselves".
 
>> Google suggests that removing the word "only" produces a
>> phrase many times more commonly known...

>And very interesting reading (to spawn another diversion
>typical to c.l.p), such as the third link in Google
>titled "Vessel of Honour: ..." (content available only
>via the "Cached" link), which points out that this
>biblical-sounding phrase was never in the bible,
>but actually comes *from Greek mythology*, and specifically
>(it claims) from the same story as Christos has
>quoted, except that the "god" in question was Hercules
>and other details differ somewhat...

It seems that I mixed two myths (I should pay more attention probably to
mythology lessons at primary school :).  The fable with Hercules is the
correct one, as far as a cart and mud is concerned.  The one about
Athena and arm-motion, is that Aesop's fable:

http://www.mythfolklore.net/aesopica/oxford/480.htm

Now there's another phrase, "the smart bird gets caught by the beak",
and I don't know if I'm a smart bird, but my nose is big...
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From prasad413in at gmail.com  Wed Apr 20 02:35:06 2005
From: prasad413in at gmail.com (hue)
Date: 19 Apr 2005 23:35:06 -0700
Subject: New to Tkinter...
In-Reply-To: <opsphfvgo7rqur0o@eb.pragmadev>
References: <d431e1$9ee$1@malgudi.oar.net><opsphfvgo7rqur0o@eb.pragmadev>
Message-ID: <1113978906.823983.323410@f14g2000cwb.googlegroups.com>

Hello



From skip at pobox.com  Tue Apr 12 23:15:03 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 12 Apr 2005 22:15:03 -0500
Subject: permission
In-Reply-To: <425c8b44$1@dnews.tpgi.com.au>
References: <425c8b44$1@dnews.tpgi.com.au>
Message-ID: <16988.36535.646396.892426@montanaro.dyndns.org>


    James> Is it possible to check if you have permission to access and or
    James> change a directory or file?

Yes, but it's generally much easier to try, then recover from any errors:

    try:
        f = open(somefile, "a")
    except IOError, msg:
        print "can't open", somefile, "for writing"
    else:
        f.write("hi mom!\n")

Skip


From cam.ac.uk at mh391.invalid  Thu Apr 28 14:45:21 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 28 Apr 2005 19:45:21 +0100
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <wh8ce.142$%o.107@fed1read05>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk> <wh8ce.142$%o.107@fed1read05>
Message-ID: <d4rb04$209$1@gemini.csx.cam.ac.uk>

Dave Benjamin wrote:

> I think you meant to write something like this:
> 
> def attrsetter(obj, name, value):
>     def _return_func():
>         return setattr(obj, name, value)
>     return _return_func

Sure did. Sorry.
-- 
Michael Hoffman


From rkern at ucsd.edu  Sat Apr 23 22:41:59 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 23 Apr 2005 19:41:59 -0700
Subject: Variables
In-Reply-To: <426B0283.40602@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com>
Message-ID: <d4f0op$kp$1@sea.gmane.org>

Richard Blackwood wrote:
> To All:
> 
>    Folks, I need your help. I have a friend who claims that if I write:
> 
> foo = 5
> 
> then foo is NOT a variable, necessarily. If you guys can define for me 
> what a variable is and what qualifications you have to back you, I can 
> pass this along to, hopefully, convince him that foo is indeed a variable.

None of us can do that unless you tell us what he thinks the word 
"variable" means. The terminology is a bit fluid. I suspect that your 
friend applying a somewhat restricted notion of "variable" that 
coincides with the behavior of variables in some other language.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From onurb at xiludom.gro  Wed Apr  6 13:19:54 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Wed, 06 Apr 2005 19:19:54 +0200
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
 Flaw
In-Reply-To: <ge_3e.134004$dP1.471285@newsc.telia.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<d2mh97$8sj$1@panix2.panix.com>
	<ge_3e.134004$dP1.471285@newsc.telia.net>
Message-ID: <42541a3c$0$12176$626a14ce@news.free.fr>

Sunnan wrote:
> Aahz wrote:
> 
(snip)
>>     print "foo is", foo
> 
> 
> Is the space added automatically? (Like awk does, if you add a comma.)

Yes. But you can also format it how you like:
   print "foo is %s and that's a good news, my friends" % foo

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


From tzot at sil-tec.gr  Tue Apr 26 05:10:45 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 26 Apr 2005 12:10:45 +0300
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
	<uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
	<xImdnW33JJiov_DfRVn-iw@powergate.ca>
	<2d0s61pt0i1isc2sh42sii894hu2u57gv7@4ax.com>
Message-ID: <181s61l6hoatlsre5dpha9no6pieblbhos@4ax.com>

On Tue, 26 Apr 2005 11:58:29 +0300, rumours say that Christos "TZOTZIOY"
Georgiou <tzot at sil-tec.gr> might have written:

>http://www.mythfolklore.net/aesopica/oxford/480.htm

BTW, does anyone see the connection between:

> we should make every possible effort on our own behalf
> and only then ask for divine assistance

and proper netiquette?-)

http://www.catb.org/~esr/faqs/smart-questions.html
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From kbk at shore.net  Mon Apr 25 23:56:11 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Mon, 25 Apr 2005 23:56:11 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200504260356.j3Q3uBNw020893@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  316 open ( +2) /  2831 closed ( +7) /  3147 total ( +9)
Bugs    :  908 open (+10) /  4941 closed (+20) /  5849 total (+30)
RFE     :  178 open ( +1) /   153 closed ( +2) /   331 total ( +3)

New / Reopened Patches
______________________

package_data chops off first char of default package  (2005-04-15)
       http://python.org/sf/1183712  opened by  Wummel

[ast] fix for 1183468: return/yield in class  (2005-04-16)
       http://python.org/sf/1184418  opened by  logistix

urllib2 dloads failing through HTTP proxy w/ auth  (2005-04-18)
       http://python.org/sf/1185444  opened by  Mike Fleetwood

binascii.b2a_qp does not handle binary data correctly  (2005-04-18)
       http://python.org/sf/1185447  opened by  Eric Huss

Automatically build fpectl module from setup.py  (2005-04-18)
       http://python.org/sf/1185529  opened by  Jeff Epler

Typo in Curses-Function doc  (2005-04-20)
       http://python.org/sf/1186781  opened by  grzankam

subprocess: optional auto-reaping fixing os.wait() lossage  (2005-04-21)
       http://python.org/sf/1187312  opened by  Mattias Engdeg?rd

Add const specifier to PySpam_System prototype  (2005-04-21)
       http://python.org/sf/1187396  opened by  Luis Bruno

Don't assume all exceptions are SyntaxError's  (2005-04-25)
       http://python.org/sf/1189210  opened by  John Ehresman

Patches Closed
______________

fix typos in Library Reference  (2005-04-10)
       http://python.org/sf/1180062  closed by  doerwalter

[AST] Fix for core in test_grammar.py  (2005-04-08)
       http://python.org/sf/1179513  closed by  nascheme

Implemented new 'class foo():pass' syntax  (2005-04-03)
       http://python.org/sf/1176019  closed by  nascheme

range() in for loops, again  (2005-04-12)
       http://python.org/sf/1181334  closed by  arigo

Info Associated with Merge to AST  (2005-01-07)
       http://python.org/sf/1097671  closed by  kbk

New / Reopened Bugs
___________________

Minor error in tutorial  (2005-04-14)
CLOSED http://python.org/sf/1183274  opened by  Konrads Smelkovs

check for return/yield outside function is wrong  (2005-04-15)
       http://python.org/sf/1183468  opened by  Neil Schemenauer

try to open /dev/null as directory  (2005-04-15)
       http://python.org/sf/1183585  opened by  Roberto A. Foglietta

PyDict_Copy() can return non-NULL value on error  (2005-04-15)
CLOSED http://python.org/sf/1183742  opened by  Phil Thompson

Popen4 wait() fails sporadically with threads  (2005-04-15)
       http://python.org/sf/1183780  opened by  Taale Skogan

return val in __init__ doesn't raise TypeError in new-style  (2005-04-15)
CLOSED http://python.org/sf/1183959  opened by  Adal Chiriliuc

dest parameter in optparse  (2005-04-15)
       http://python.org/sf/1183972  opened by  ahmado

Missing trailing newline with comment raises SyntaxError  (2005-04-15)
       http://python.org/sf/1184112  opened by  Eric Huss

example broken in section 1.12 of Extending & Embedding  (2005-04-16)
       http://python.org/sf/1184380  opened by  bamoore

Read-only property attributes raise wrong exception  (2005-04-16)
CLOSED http://python.org/sf/1184449  opened by  Barry A. Warsaw

itertools.imerge: merge sequences  (2005-04-18)
CLOSED http://python.org/sf/1185121  opened by  Jurjen N.E. Bos

pydoc doesn't find all module doc strings  (2005-04-18)
       http://python.org/sf/1185124  opened by  Kent Johnson

PyObject_Realloc bug in obmalloc.c  (2005-04-19)
       http://python.org/sf/1185883  opened by  Kristj?n Valur

python socketmodule dies on ^c  (2005-04-19)
CLOSED http://python.org/sf/1185931  opened by  nodata

tempnam doc doesn't include link to tmpfile  (2005-04-19)
       http://python.org/sf/1186072  opened by  Ian Bicking

[AST] genexps get scoping wrong  (2005-04-19)
       http://python.org/sf/1186195  opened by  Brett Cannon

[AST] assert failure on ``eval("u'\Ufffffffe'")``  (2005-04-19)
       http://python.org/sf/1186345  opened by  Brett Cannon

[AST] automatic unpacking of arguments broken  (2005-04-19)
       http://python.org/sf/1186353  opened by  Brett Cannon

Python Programming FAQ should be updated for Python 2.4  (2005-02-09)
CLOSED http://python.org/sf/1119439  reopened by  montanaro

nntplib shouldn't raise generic EOFError  (2005-04-20)
       http://python.org/sf/1186900  opened by  Matt Roper

TypeError message on bad iteration is misleading  (2005-04-21)
       http://python.org/sf/1187437  opened by  Roy Smith

Pickle with HIGHEST_PROTOCOL "ord() expected..."  (2005-04-22)
CLOSED http://python.org/sf/1188175  opened by  Heiko Selber

Rebuilding from source on RH9 fails (_tkinter.so missing)  (2005-04-22)
       http://python.org/sf/1188231  opened by  Marty Heyman

Python 2.4 Not Recognized by Any Programs  (2005-04-23)
       http://python.org/sf/1188637  opened by  Yoshi Nagasaki

zipfile module and 2G boundary  (2005-04-24)
       http://python.org/sf/1189216  opened by  Bob Ippolito

Seg Fault when compiling small program  (2005-04-24)
       http://python.org/sf/1189248  opened by  Reginald B. Charney

LINKCC incorrect  (2005-04-25)
       http://python.org/sf/1189330  opened by  Christoph Ludwig

LINKCC incorrect  (2005-04-25)
CLOSED http://python.org/sf/1189337  opened by  Christoph Ludwig

file.write(x) where len(x) > 64*1024**2 is unreliable  (2005-04-25)
CLOSED http://python.org/sf/1189525  opened by  Martin Gfeller

pydoc may hide non-private doc strings.  (2005-04-25)
       http://python.org/sf/1189811  opened by  J Livingston

"Atuple containing default argument values ..."  (2005-04-25)
       http://python.org/sf/1189819  opened by  Chad Whitacre

Bugs Closed
___________

Minor error in tutorial  (2005-04-14)
       http://python.org/sf/1183274  closed by  doerwalter

copy.py bug  (2005-02-03)
       http://python.org/sf/1114776  closed by  anthonybaxter

re.escape(s) prints wrong for chr(0)  (2005-04-13)
       http://python.org/sf/1182603  closed by  nascheme

PyDict_Copy() can return non-NULL value on error  (2005-04-15)
       http://python.org/sf/1183742  closed by  rhettinger

return val in __init__ doesn't raise TypeError in new-style  (2005-04-15)
       http://python.org/sf/1183959  closed by  rhettinger

dir() does not include _  (2005-04-13)
       http://python.org/sf/1182614  closed by  nickjacobson

Read-only property attributes raise wrong exception  (2005-04-16)
       http://python.org/sf/1184449  closed by  bwarsaw

Readline segfault  (2005-04-05)
       http://python.org/sf/1176893  closed by  mwh

python socketmodule dies on ^c  (2005-04-19)
       http://python.org/sf/1185931  closed by  nodata101

Bad sys.executable value for bdist_wininst install script  (2005-04-12)
       http://python.org/sf/1181619  closed by  theller

StringIO and cStringIO don't provide 'name' attribute  (2005-04-03)
       http://python.org/sf/1175967  closed by  mwh

Python Interpreter shell is crashed   (2005-01-12)
       http://python.org/sf/1100673  closed by  mwh

Python Programming FAQ should be updated for Python 2.4  (2005-02-09)
       http://python.org/sf/1119439  closed by  jafo

Dictionary Parsing Problem  (2005-02-05)
       http://python.org/sf/1117048  closed by  tjreedy

2.4.1 breaks pyTTS  (2005-04-07)
       http://python.org/sf/1178624  closed by  doerwalter

Pickle with HIGHEST_PROTOCOL "ord() expected..."  (2005-04-22)
       http://python.org/sf/1188175  closed by  drhok

multiple broken links in profiler docs  (2005-03-30)
       http://python.org/sf/1173773  closed by  isandler

LINKCC incorrect  (2005-04-25)
       http://python.org/sf/1189337  closed by  cludwig

file.write(x) where len(x) > 64*1024**2 is unreliable  (2005-04-25)
       http://python.org/sf/1189525  closed by  tim_one

New / Reopened RFE
__________________

"replace" function should accept lists.  (2005-04-17)
CLOSED http://python.org/sf/1184678  opened by  Poromenos

Make bisect.* functions accept an optional compare function  (2005-04-18)
       http://python.org/sf/1185383  opened by  Marcin Ciura

RFE Closed
__________

"replace" function should accept lists.  (2005-04-17)
       http://python.org/sf/1184678  closed by  rhettinger

itertools.imerge: merge sequences  (2005-04-18)
       http://python.org/sf/1185121  closed by  jneb



From tjreedy at udel.edu  Fri Apr  1 18:48:05 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 18:48:05 -0500
Subject: that is it is not it (logic in Python)
References: <424d0be1$0$2882$626a14ce@news.free.fr><mailman.1199.1112380840.1799.python-list@python.org>
	<424dc4b4$0$18707$636a15ce@news.free.fr>
Message-ID: <d2kmgu$j7r$1@sea.gmane.org>


"F. Petitjean" <littlejohn.75 at news.proxad.net> wrote in message 
news:424dc4b4$0$18707$636a15ce at news.free.fr...
Le Fri, 1 Apr 2005 13:39:47 -0500, Terry Reedy a ?crit :
>> Reread the ref manual on chained comparison operators.

>And see the date of the post :-)

Ditto for the reply ;-)

TJR







From maxm at mxm.dk  Fri Apr  8 05:15:38 2005
From: maxm at mxm.dk (Max M)
Date: Fri, 08 Apr 2005 11:15:38 +0200
Subject: doubt regarding  Conversion of date into timestamp
In-Reply-To: <mailman.1523.1112948701.1799.python-list@python.org>
References: <mailman.1523.1112948701.1799.python-list@python.org>
Message-ID: <42564b6f$0$246$edfadb0f@dread12.news.tele.dk>

praba kar wrote:
> Dear All,
> 
>      I am new to Python I want to know how to 
> change a time into timestamp


Is there any specific reason for not using datetime instead of time ?

-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From fredrik at pythonware.com  Fri Apr 22 02:21:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 08:21:39 +0200
Subject: Manipulating large blobs in Python
References: <42686F31.3060101@fourstonesExpressions.com>
Message-ID: <d4a4t0$7u8$1@sea.gmane.org>

Tim Stone wrote:

> I'm working on a module that will manipulate large blobs.  I'm using a C 
> dll to allocate big blocks of memory, using PyMem_Malloc, which is 
> working quite well up until I try to manipulate a blob that exhausts 
> Python's heap.

how large is that?

> I'm guessing that to increase the heapsize, I'm going to have to recompile 
> Python... (??)  Am I on the right track?

no.  if PyMem_Malloc fails (i.e. returns NULL), it's the operating system
that refuses to give your process more memory.

</F>



From steven.bethard at gmail.com  Sat Apr  2 17:02:28 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 02 Apr 2005 15:02:28 -0700
Subject: Performance issue
In-Reply-To: <pan.2005.04.02.20.42.34.146641@gmx.net>
References: <mailman.1239.1112456748.1799.python-list@python.org>
	<pan.2005.04.02.20.42.34.146641@gmx.net>
Message-ID: <wcOdnbfkvdPFi9LfRVn-oQ@comcast.com>

Marc 'BlackJack' Rintsch wrote:
> def make_anagram_map(words):
>     anagram_map = dict()
>     for word in imap(lambda w: w.strip().lower(), words):
>         sorted_word = ''.join(sorted(list(word)))
>         anagram_map.setdefault(sorted_word, list()).append(word)
>     
>     return dict(ifilter(lambda x: len(x[1]) > 1, anagram_map.iteritems()))

Or if you're afraid of map and filter like me, you can try:

def make_anagram_map(words):
     anagram_map = {}
     for word in (w.strip().lower() for w in words):
         anagram_map.setdefault(''.join(sorted(word)), []).append(word)
     return dict(sortedword_wordlist
                 for sortedword_wordlist in anagram_map.iteritems()
                 if len(sortedword_wordlist[1]) > 1)


py> make_anagram_map(['owers', 'pest', 'rowse', 'pets', 'sower', 'step'])
{'epst': ['pest', 'pets', 'step'], 'eorsw': ['owers', 'rowse', 'sower']}

STeVe


From peter at engcorp.com  Mon Apr 18 10:23:30 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 18 Apr 2005 10:23:30 -0400
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <1113832747.373571.13220@l41g2000cwc.googlegroups.com>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<1113832747.373571.13220@l41g2000cwc.googlegroups.com>
Message-ID: <LLOdnUWIq_J3X_7fRVn-vg@powergate.ca>

beliavsky at aol.com wrote:
> What are the potential applications of Python on PalmOS? Just curious.

Python is a general purpose programming language,
as you know.  Doesn't that suggest that the
set of potential applications is pretty much all
those which don't require the raw performance of
C or perhaps some highly specialized feature
available only in another language (if such a
thing even exists)?

Calendar tools, time tracking tools, games,
various kinds of network clients (for the latest
Palms), etc.  I've just written a very specialized
time tracking tool in Plua, which could easily have
been done using Python if it had access to the
UI elements and the file system as Plua does.

Given that you already know what Python is all about,
your question sounds to me like that of someone who
doesn't even know what a Palm is good for... which
I doubt you are, so I find the question rather puzzling.

-Peter


From ruach at chpc.utah.edu  Fri Apr 22 16:46:26 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 22 Apr 2005 14:46:26 -0600
Subject: handling tar, gz and bz2 with python
Message-ID: <d4bnr4$89e$1@vegh.ks.cc.utah.edu>

Is there a module for unpacking tar files in python? how about bzip2 and
gzips? I know I can use the gzip module for gzips but is there anything
that can detect what format a file is in and decopress and unpack it
using the other methods?

thanks
-Matthew


From sunnan at handgranat.org  Sun Apr  3 18:38:55 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sun, 03 Apr 2005 22:38:55 GMT
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <3b99ncF6fd2apU1@individual.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<87is3663cn.fsf@wilson.rwth-aachen.de>
	<3b99ncF6fd2apU1@individual.net>
Message-ID: <3g_3e.134005$dP1.471451@newsc.telia.net>

Artie Gold wrote:
> Torsten Bronger wrote:
>> The whole text seems to be a variant of
>> <http://www.artima.com/weblogs/viewpost.jsp?thread=98196>.
>>
>> Tsch?,
>> Torsten.
>>
> Ya think? ;-)

Heh. I was glad that Torsten pointed it out; I didn't get what was funny 
about the joke until then.


From vze4rx4y at verizon.net  Fri Apr  1 11:42:30 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 01 Apr 2005 16:42:30 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
Message-ID: <WRe3e.1286$7b.403@trndny05>

[Roy Smith  <roy at panix.com>]
> One thing that worries me a little is that all three seem to have
> advantages and disadvantages, yet none is so obviously better than the
> others that it stands out as the only reasonable way to do it.  This means
> some groups will adopt one, some will adopt another, and the world will
> become fragmented.

Worry is a natural thing for someone with "panix" in their email address ;-)

FWIW, the evolution of py.test is to also work seemlessly with existing tests
from the unittest module.

the world diversifies, the world congeals,


Raymond Hettinger




From timothy at open-networks.net  Sun Apr 17 00:02:20 2005
From: timothy at open-networks.net (Timothy Smith)
Date: Sun, 17 Apr 2005 14:02:20 +1000
Subject: pysvn install on freebsd
Message-ID: <4261DFCC.6010601@open-networks.net>

has anyone used or installed this on fbsd
the install for it is totally redundant. i get this error for it

make -f freebsd.mak clean all test
cd ../Source && make -f pysvn_freebsd_py.mak clean
make: cannot open pysvn_freebsd_py.mak.
*** Error code 2

Stop in /usr/home/timothy/pysvn-1.1.2/Extension/Builder.



From cpghost at cordula.ws  Wed Apr 13 11:37:34 2005
From: cpghost at cordula.ws (Cordula's Web)
Date: 13 Apr 2005 08:37:34 -0700
Subject: for line in file weirdness
References: <1113388411.589754.82600@f14g2000cwb.googlegroups.com>
	<1113393892.784115.79720@o13g2000cwo.googlegroups.com>
Message-ID: <1113406654.084550.118410@g14g2000cwa.googlegroups.com>

Thanks :)

Reading everything into a variable was not an option, due to some very
large files. Creating the iterator only once, as Fredrik suggested,
solved the problem nicely.

Again many thanks for your great support!



From carsten at uniqsys.com  Mon Apr  4 17:14:21 2005
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 04 Apr 2005 17:14:21 -0400
Subject: Looking for Stephen Turner, maintainer of informixdb
In-Reply-To: <42490c40$0$27184$9b4e6d93@newsread4.arcor-online.net>
References: <mailman.980.1112047851.1799.python-list@python.org>
	<42490c40$0$27184$9b4e6d93@newsread4.arcor-online.net>
Message-ID: <1112649261.15320.13.camel@dot.uniqsys.com>

On Tue, 2005-03-29 at 03:05, Michael Husmann wrote:
> Carsten Haese wrote:
> 
> > Hello everybody:
> > 
> > I have discovered that the functionality for connecting Python to an
> > Informix database is currently in a frustrating state of neglect. The
> > link to Kinfxdb is dead, and informixdb doesn't build on Python 2. I
> > couldn't find any usable workarounds to the build problem, so I worked
> > out successfully how to build informixdb using distutils.
> > 
> > Now I'd like to share the result with the community, but the maintainer
> > appears to have gone missing. My emails to sjturner at ix.netcom.com and
> > stepturn at mediaone.net have bounced back undeliverable, so now I'm
> > posting to the lists trying to locate Stephen.
> > 
> > If anybody has any pointers for locating Stephen Turner, please let me
> > know. If Stephen can't be located, I'd be willing to take over the
> > project, but I'd prefer the torch be given to me rather than me just
> > taking it.
> 
> Carsten,
> 
> haven't heard anything from Stephen either, but there are some extensions to
> the informixdb module. I'll send the sources to you next week. So if you
> like you can bundle everything in one package.

Michael, I'd certainly like to take a look at those extensions. (I tried
to respond to you off-list, but my mail bounced back. Is this project
cursed or am I? :) I hope you're reading this, Michael.)

A week has gone by with no replies as to Stephen's whereabouts, and one
reply telling me that I can, in good faith, go ahead and release a fork.
Unless somebody tells me I should wait longer, I guess I'll do that.
Stay tuned for the announcement on when and where my fork will be
available.

Best regards,

-- 
  Carsten Haese - Software Engineer   |    Phone:  (419) 861-3331
        Unique Systems, Inc.          |      FAX:  (419) 861-3340
     1446 Reynolds Rd, Suite 313      |
         Maumee, OH  43537            |  mailto:carsten at uniqsys.com



From apardon at forel.vub.ac.be  Fri Apr 15 03:32:21 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 15 Apr 2005 07:32:21 GMT
Subject: A testcase for a Queue like class.
Message-ID: <slrnd5urg5.lf2.apardon@rcpc42.vub.ac.be>

I'm writing some sort of replacement for the Queue module.
I'm calling the class I'm writing a tube. However I'm stuck
in how I should write some testcases.

The tube will have an open method, with as argument an
access parameter that will determine if the thread wants
to put things (write) on the queue or will get (read) things
from the queue (or both). Now what I want is that a thread that
opens the tube for read access will block until a thread opens
the same tube for write access.

The problem is how do I put such a requirement in a test case?

-- 
Antoon Pardon


From j1k1cki at hotmail.com  Mon Apr 11 02:41:31 2005
From: j1k1cki at hotmail.com (j1k1cki at hotmail.com)
Date: 10 Apr 2005 23:41:31 -0700
Subject: Cleaning up after C module
Message-ID: <1113201691.215996.129930@f14g2000cwb.googlegroups.com>

Hello,

I have a Python module written in C that spawns and kills processes
using OS-specific mechanisms. I want to kill all spawned processes when
the interpreter exits. I tried to wrap every spawned process in a
Python object like this:

    import cmodule
    class Process:
        __init__(self, execname): self.pid = cmodule.spawn(execname)
        __del__(self): cmodule.kill(self.pid)

    p = Process("foo")

but this does not work, I am getting and exception inidicating that
'cmodule' is 'None' in '__del__()'.

Moreover, the Language Reference states that "It is not guaranteed that
__del__() methods are called for objects that still exist when the
interpreter exits", so it looks like this approach is wrong anyway. How
do I do this right?

Thanks very much in advance
Grzegorz

PS: Python 2.3.3



From deetsNOSPAM at web.de  Sun Apr 10 07:57:26 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 10 Apr 2005 13:57:26 +0200
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<d3955k$kne$00$1@news.t-online.com>
	<pan.2005.04.09.21.20.39.130792@jerf.org>
Message-ID: <d3b4b6$31o$00$1@news.t-online.com>

> Domain-specific abstractions do that *faster* than GUI designers, not
> slower. And better, too, since every iteration tends to be fully
> functional and not just a "let's see what this looks like" prototype.

Can you show me some working, in-use example for that?  I _seriously_ doubt
that the process of rearranging and tuning the layout can be done faster in
the text-world than with a good designer like qt-designer. But I'm all ears
for better solutions.

BTW, when I talk of gui designers, I _only_ have them for creating guis - no
attaching of event code or stuff like that (except from some trivial
signal-slot-connections, that is)

As a programmer, the only thing of interest to me are the certain widgets I
need my logic to bind to. The structure of the thing itself I don't care
about.

> 
> Heck, switch 'em out dynamically based on what day of the week it is and
> how the user feels today. Let's see your GUI-designer do that.
> 
> And if you're not used to doing it that way, you'll be *stunned* at how
> much stuff tends to factor out and get easily re-used.

Well - stun me by example :)

> 
> An approach that has more data to work with (some idea of what things are
> doing and what they are for) will beat an approach with less data ("thing
> at row 4, col 2" or, worst case, "thing at 233,144") any day.

Hm. There certainly are cases where I take smaller building blocks and
rearrange them according to my current needs - all in python of course. But
that's only a comparably small part - at least to  my current apps. It
could grow depending on the type of application - e.g. database driven
stuff - but so far, I'm pretty well with creating the larger
dialogs/widgets in the designer and when the functionality is working, the
rearranging of these widgets for better usability is pretty important and
certainly easier done in the designer.

To me the whole discussion is similar to generating html using python or
using templates - templates need only to conform to a certain interface for
the app writer to work. Sure, sometimes things get a little bit more
tedious compared to just printing out html fragments. But the more control
you want over the look of your results, the less powerful the generating
approach becomes - because you simply lack the features to control the
layout or you take deep steps into parameter hell - but then I see html as
a domain specific language and prefer to use that to control the layout. 

I've seen such development in the java-world using struts, where people
introduced their own tags for displaying data objects - over time, some of
these grew 10 or more cryptic attributes for fine-controlling the layout.
Instead of just providing the necessary data and letting jsp do the layout.

-- 
Regards,

Diez B. Roggisch


From ksenia.marasanova at gmail.com  Mon Apr 11 03:42:22 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Mon, 11 Apr 2005 09:42:22 +0200
Subject: templating system
In-Reply-To: <d3ci1i$dsq$1@sea.gmane.org>
References: <130df19305041008552621549c@mail.gmail.com>
	<d3ci1i$dsq$1@sea.gmane.org>
Message-ID: <130df19305041100427ea9d54d@mail.gmail.com>

> >
> http://www.reportlab.org/preppy.html

Looks very close to what I was looking for :)
Thanks!

-- 
Ksenia


From codecraig at gmail.com  Fri Apr 15 09:43:15 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 06:43:15 -0700
Subject: Get OS name
Message-ID: <1113572595.889597.206690@g14g2000cwa.googlegroups.com>

How can I get the OS Name, such as "Windows XP Pro".  I know I can do

sys.getwindowsversion but that doesnt return a nice Windows XP Pro
string.

and os.name gives "nt"

thanks.



From gsakkis at rutgers.edu  Mon Apr 11 07:08:00 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 11 Apr 2005 04:08:00 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
	<mailman.1596.1113015264.1799.python-list@python.org>
	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>
	<mailman.1607.1113039130.1799.python-list@python.org>
	<1113043759.765568.9920@o13g2000cwo.googlegroups.com>
	<425919b6.16894062@news.oz.net>
Message-ID: <1113217680.850207.93810@z14g2000cwz.googlegroups.com>

"Bengt Richter" <bokr at oz.net> wrote in message
news:425919b6.16894062 at news.oz.net...
>
> See if this does what you want:
>
> [snipped]
>

Yes, that's pretty much what I had in mind. I particularly liked the
idea of mirroring automagically the nested class inheritance in each
version. So I tried to refine this recipe a little and I pushed down
the boilerplate code from 3 lines to one word; laziness is a virtue :-)


Below is the test only; I posted the main module to
http://rafb.net/paste/results/Hweu3t19.html to avoid messing up the
indentation.

Cheers,
George

#=================================================
# test.py
from namespace import Namespace

class Era(object):
    def __init__(self):
        self.lumberjack = self.GameUnit()
        self.warrior = self.CombatUnit()
        self.shooter = self.RangedUnit()

class MedievalAge(Era):
    __metaclass__ = Namespace()
    class GameUnit(object):
        def move(self): return "MedievalAge.GameUnit.move()"
    class CombatUnit(GameUnit):
        def fight(self): return "MedievalAge.CombatUnit.fight()"
    class RangedUnit(CombatUnit):
        def aim(self): return "MedievalAge.RangedUnit.aim()"

class ColonialAge(Era):
    __metaclass__ = Namespace(MedievalAge)
    class CombatUnit:
        def fight(self): return "ColonialAge.CombatUnit.fight()"

class IndustrialAge(Era):
    __metaclass__ = Namespace(ColonialAge)
    class GameUnit:
        def move(self): return "IndustrialAge.GameUnit.move()"
    class RangedUnit:
        def aim(self): return "IndustrialAge.RangedUnit.aim()"


if __name__ == '__main__':
    for era in MedievalAge(), ColonialAge(), IndustrialAge():
        for player in era.lumberjack, era.warrior, era.shooter:
            for action in "move", "fight", "aim":
                try: result = getattr(player,action)()
                except AttributeError:
                    result = "N/A"
                print "%s:%s.%s:\t%s" % (type(era).__name__,
                                         type(player).__name__,
                                         action, result)



From myata99 at tom.com  Wed Apr 13 14:17:15 2005
From: myata99 at tom.com (Tom)
Date: Thu, 14 Apr 2005 02:17:15 +0800
Subject: How to call a function in embeded python code in delphi?
Message-ID: <425D622B.1020600@tom.com>

delphi 7
python 2.3
win98
Python for Delphi V3.25


In Delphi:
1   Create a new Form ;
2   Drop a TMemo(Memo1) to contain python code;
3   Drop a TPythonInputOutput (PythonInputOutput1) ;
4   Drop a TPythonEngine (PythonEngine1) ;
5   Drag a PythonDelphiVar component and name it bx.  Set the VarName 
property to the same as its name;
6   Connect the attribute IO of the TPythonEngine to the 
TPythonInputOutput;
7   Drop a TButton (Button1) ;
8   Write python code in the Memo1 (set Memo1's property of lines):

           def ax(m,n):
                  y=10
                  bx.value=y+m+n
                  ...

Now, As click Button1, how to call the funtion ax passing the 
arguments(such as m=33 and n=25), and get bx.ValueAsString  ;


Delphi Code:

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

unit Unit1;

interface

uses
   Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, 
Forms,
   Dialogs, PythonEngine, StdCtrls;

type
   TForm1 = class(TForm)
     Memo1: TMemo;
     Button1: TButton;
     PythonEngine1: TPythonEngine;
     bx: TPythonDelphiVar;
     PythonInputOutput1: TPythonInputOutput;
     procedure Button1Click(Sender: TObject);
   private
     { Private declarations }
   public
     { Public declarations }
   end;

var
   Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
          /////////////////////////////////////////////////
          //                                             //
          //  How to call the funtion ax passing the     //
          //  arguments(such as m=33 and n=25), and      //
          //  get bx.ValueAsString ??                    // 

          //                                             //
          /////////////////////////////////////////////////


          showmessage( bx.ValueAsString );


end;

end.



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



Thank you very much!!










From jmeile at hotmail.com  Mon Apr 18 11:43:59 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Mon, 18 Apr 2005 17:43:59 +0200
Subject: Zope3 and Plone
In-Reply-To: <1113835544.983163.202080@z14g2000cwz.googlegroups.com>
References: <1113835544.983163.202080@z14g2000cwz.googlegroups.com>
Message-ID: <4263D5BF.40407@hotmail.com>

Hi Mir,

you are asking in the wrong place. This is a python specific list. You
can find a suitable list here:
http://mail.zope.org/mailman/listinfo

Regards,
Josef

Mir Nazim wrote:
> Hi,
> 
> I wanted to know what will happen to plone once Zope3 will be official
> version. Is plone being ported to Zope3. I googled it but did not come
> accross anything stating the plone's migration to zope3.
> 
> I am thinking to take up a project. plone is a candidate for it. should
> i want to take  benifit of zope3 features too.
> 
> what should be done. 
> 
> Please comment
> thanks
> 




From programmer.py at gmail.com  Fri Apr 15 22:23:32 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Fri, 15 Apr 2005 21:23:32 -0500
Subject: Piping data into script under Win32
In-Reply-To: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
References: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
Message-ID: <d52c72d205041519235013bce3@mail.gmail.com>

I can't think of any reason that wouldn't work.  You've entered the
code in exactly like you have it below?

Could you paste the traceback from your console?

jw

On 15 Apr 2005 19:11:44 -0700, runes <rune.strand at gmail.com> wrote:
> I trying to figure out a way to make a python script accept data output
> from another process under Windows XP, but I fail miserably. I have a
> vague memory having read this is not possible with Python under
> Windows...
> 
> But googling for a clue I came across this from /Learning Python/ (Lutz
> & Ascher) [1]
> 
> <Learning Python>
> 
> import sys
> data = sys.stdin.readlines()
> print "Counted", len(data), "lines."
> 
> On Unix, you could test it by doing something like:
> 
> % cat countlines.py | python countlines.py
> Counted 3 lines.
> 
> On Windows or DOS, you'd do:
> 
> C:\> type countlines.py | python countlines.py
> Counted 3 lines.
> 
> </Learning Python>
> 
> So: Is it possible to pipe data under DOS/Win9x but not NT/2k/XP or is
> it a bug in /Learning Python/ ?
> 
> I've tried about all kinds of sane and insane approaches involving
> sys.stdin, but they all results in IOError: [Errno 9] Bad file
> descriptor.
> 
> [1] <http://www.oreilly.com/catalog/lpython/chapter/ch09.html>
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From steve at holdenweb.com  Tue Apr 26 08:34:25 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 08:34:25 -0400
Subject: regex over files
In-Reply-To: <426E221D.5020005@chamonix.reportlab.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk><426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<d4l1o8$65v$1@sea.gmane.org>
	<426E221D.5020005@chamonix.reportlab.co.uk>
Message-ID: <d4lc6h$hsg$1@sea.gmane.org>

Robin Becker wrote:
> Steve Holden wrote:
> ......
> 
>>
>> I seem to remember that the Medusa code contains a fairly good 
>> overlapped search for a terminator string, if you want to chunk the file.
>>
>> Take a look at the handle_read() method of class async_chat in the 
>> standard library's asynchat.py.
> 
> .....
> thanks I'll give it a whirl
> 
Whoops, I don't think it's a regex search :-(

You should be able to adapt the logic fairly easily, I hope.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bogus@does.not.exist.com  Fri Apr 15 11:55:02 2005
From: bogus@does.not.exist.com ()
Date: Fri, 15 Apr 2005 15:55:02 -0000
Subject: (no subject)
Message-ID: <mailman.23.1572215648.3356.python-list@python.org>

#! rnews 2153
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!195.241.76.212.MISMATCH!transit1.news.tiscali.nl!transit0.news.tiscali.nl!tiscali!newsfeed1.ip.tiscali.net!proxad.net!proxad.net!newshosting.com!nx02.iad01.newshosting.com!novia!feed2.newsreader.com!newsreader.com!newsread.com!news-xfer.newsread.com!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: Python's use in RAD
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqxvf6o12c9.fsf at cola2.ca.boeing.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Lines: 46
Sender: hgg9140 at cola2.ca.boeing.com
Organization: The Boeing Company
References: <mailman.1972.1113576517.1799.python-list at python.org>
Mime-Version: 1.0
Date: Fri, 15 Apr 2005 15:33:58 GMT
Xref: news.xs4all.nl comp.lang.python:372620

"Ross Cowie" <ross1cowie at hotmail.com> writes:

> Hi,
> 
> I am currenly a second year university student and was wondering if
> you could help me ut. As part of a project i have decided to write
> about python, i am not having very much luck with regards to finding
> infrmation on pythons use in Rapid Application Development, and was
> wondering of you could highlight some of the features that make it
> suitable for RAD. Like the use of dinamic binding.
> 
> Your healp would be appreciated.
> 
> Hope to hear from you soon.
> 
> Ross
> 
> 

Generally we don't do homework here.   But we can give you pointers.

1. Searching google for "python RAD" shows 148,000 hits, and at least
   the first few pages look relevant.  Did you check?

2. "RAD" means different things to different people.   Do you mean:
a) Agile/Extreme Programming (2 or more people working together)
b) Test-driven
c) GUI builder
d) Rapid edit-run cycle
e) Lots of libraries so your work is just hooking together existing tools
f) Dynamic, code-generated-on-the-fly, or other meta programming
g) Project management experience in life cycle flow times and labor costs

You need to understand your assignment in these terms, then you can
investigate Python.

3. As a practical matter, Python does "a"-"g" quite well.  Originally
this was because of the rich-yet-clean syntax and batteries-included
libraries.  These days those factors still count, but they are
enhanced by large numbers of "other" libraries and tools which have
Python bindings.

-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From rkern at ucsd.edu  Sat Apr 23 23:50:53 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 23 Apr 2005 20:50:53 -0700
Subject: Variables
In-Reply-To: <426B1300.6090802@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b0d03_3@newspeer2.tds.net>
	<426B1300.6090802@cloudthunder.com>
Message-ID: <d4f4ps$7cu$1@sea.gmane.org>

Richard Blackwood wrote:
> Kent Johnson wrote:
> 
>> Richard Blackwood wrote:
>>
>>>>> To All:
>>>>>
>>>>>    Folks, I need your help. I have a friend who claims that if I 
>>>>> write:
>>>>>
>>>>> foo = 5
>>>>>
>>>>> then foo is NOT a variable, necessarily. 
>>>>
>>>>
>>>>
>>> Indeed, this language is math. My friend says that foo is a constant 
>>> and necessarily not a variable. 
>>
>>
>>
>> Well, we mostly talk Python here, not math. In Python, if you say
>> foo = 5
>> foo is a name bound to an immutable value.
>>
>> If I had written foo = raw_input(), he would
>>
>>> say that foo is a variable. 
>>
>>
>>
>> That's funny. foo is still a name bound to an immutable (string) 
>> value. foo is no more or less variable than it was with foo = 5.
>>
>> Which is perfectly fine except that he
>>
>>> insists that since programming came from math, the concept of 
>>> variable is necessarily the identical. This can not be true. For 
>>> example, I may define foo as being a dictionary, but I can not do 
>>> this within math because there is no concept of dictionaries within 
>>> mathematics; yet foo is a variable, a name bound to a value which can 
>>> change.
>>
>>
>>
>> Sounds like you are having a stupid and meaningless argument with your 
>> friend. What you call foo won't change what it is. He should learn 
>> Python, then he would understand the true zen of foo.
> 
> 
> That is exactly how I feel about it. Foo is what it is. Variable, name 
> bound to immutable value, etc., what we call it doesn't really change 
> how I program, only how I communicate with other programmers (and 
> mathematicians). Is the notion of variable not a fundamental concept in 
> programming?  Surely there must be an unambiguous definition I can relay 
> to him.

Why should there be? Different programming languages have different 
models. In C, a variable corresponds to a memory slot. In Python, it's a 
just a name that can be bound to an object.

If you must, http://en.wikipedia.org/wiki/Variable

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From nemesis at nowhere.invalid  Tue Apr 12 16:11:45 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Tue, 12 Apr 2005 20:11:45 GMT
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net><20050411194907.1769.17472.XPN@orion.homeinvalid>
	<425AF2FD.2080006@v.loewis.de>
	<mailman.1742.1113299104.1799.python-list@python.org>
Message-ID: <20050412192200.1706.92325.XPN@orion.homeinvalid>

Mentre io pensavo ad una intro simpatica "Fredrik Lundh" scriveva:

>> It will just work. Python installs the DLL if it is missing, and leaves
>> it alone (just incrementing the refcount) if it is present on the target
>> system.
> installs it where?  the MS docs seem to indicate that they want you to install
> it in the program directory, rather than in a "shared" location:

As far I remember the Python installer copies this dll in the system32
folder if you install Python as Administrator, instead it  leaves the
dll inside the Python folder if you install Python as User.

-- 
As a computer, I find your faith in technology amusing.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From peter at engcorp.com  Mon Apr  4 10:06:46 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 04 Apr 2005 10:06:46 -0400
Subject: redundant importr
In-Reply-To: <f4z3e.1157512$35.42888414@news4.tin.it>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<3avnh3F6cekgkU1@individual.net>
	<fZU2e.718439$b5.32462435@news3.tin.it>
	<juudnZEu35NXvNHfRVn-jg@powergate.ca>
	<Qkh3e.1153576$35.42709917@news4.tin.it>
	<1MudnZ0j7M-bIdDfRVn-sA@powergate.ca>
	<f4z3e.1157512$35.42888414@news4.tin.it>
Message-ID: <kv2dnZwEbKWF18zfRVn-sA@powergate.ca>

max(01)* wrote:
> Peter Hansen wrote:
>> No it doesn't.  I thought I was clear, but I can reword
>> it for you: the files are compiled *in-memory* and the
>> results are never written to disk.
>>
>>  > *if* they are compiled, where are they put, if the
>>> corresponding *.py files are on a non-writeable directory?
>>
>> They are not put anywhere.  
> 
> ok, maybe it is an implementation-dependent issue after all.

Not really.

> consider this:
[snip]
> -rw-r--r--    1 max2     max2          307 2005-04-02 17:45 imported.pyc
> 
> see?

Yes, but you don't, yet. :-)

Obviously the .pyc file is being written, so my comments
above, out of context, is wrong.

Now please go put them back in context.  You asked what
would happen if the directory was not writable.  That's
the context in which to interpret my claims that the
bytecode (the *result* of the compilation) is not
written to disk.

I'll try one last time, before giving up in abject
failure and letting someone else take a stab at this:
the compilation will occur every time if a .pyc file
does not exist.  The interpreter will attempt to write
the results of the compilation process to disk in a
.pyc file to cache it for the next time, to avoid
having to recompile.  *If* this is not possible, then
no caching takes place, no .pyc file is written, and
the next time you run the code, the compilation step
will occur all over again (note: with the results being
held in memory only while the program runs, then
discarded).

Please tell me it's clear now. :-)

-Peter


From nick at craig-wood.com  Mon Apr  4 07:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 04 Apr 2005 11:30:02 GMT
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
	<1112278104.651390.305160@f14g2000cwb.googlegroups.com>
	<1112278604.081328.60970@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd526t3.ne0.nick@irishsea.home.craig-wood.com>

pyguy2 at gmail.com <pyguy2 at gmail.com> wrote:
>  Thinking about cross-platform issues. I found this, from the venerable
>  Tim Peters to be enlightening for python's choice of design:
> 
>  "It's possible to build a better Queue implementation that runs only on
>  POSIX systems, or only on Windows systems, or only on one of a dozen
>  other less-popular target platforms.  The current implementation works
>  fine on all of them, although is suboptimal compared to what could be
>  done in platform-specific Queue implementations. "
> 
>  Here is a link:
>  http://groups-beta.google.com/group/comp.lang.python/messages/011f680b2dac320c,a03b161980b81d89,1162a30e96ae330a,0db1e52548493843,6b8d593c84ad4fd4,b6293a53f98252ce,82cddc89805b4b56,81c7289cc4cb4441,0906b24cc1534844,3ff6629391074ed4?thread_id=55b80d05e9d54705&mode=thread&noheader=1&q=queue+timeout+python#doc_011f680b2dac320c

Interesting thread.

How about leaving the current threading alone, but adding a pthreads
module for those OSes which can use or emulate posix threads? Which is
windows and most unixes?


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


From benmarkwell at gmail.com  Fri Apr  1 22:52:42 2005
From: benmarkwell at gmail.com (Ben)
Date: 1 Apr 2005 19:52:42 -0800
Subject: New to programming question
In-Reply-To: <b4kp41t8r330hqamkejptpdp9f82jlrl08@4ax.com>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<b4kp41t8r330hqamkejptpdp9f82jlrl08@4ax.com>
Message-ID: <1112413962.901616.37300@o13g2000cwo.googlegroups.com>

Thanks for your reply.



From bgs248 at hotmail.com  Wed Apr 27 20:34:49 2005
From: bgs248 at hotmail.com (bgs)
Date: 27 Apr 2005 17:34:49 -0700
Subject: suggestions on how to do this
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
Message-ID: <1114648489.758666.224590@o13g2000cwo.googlegroups.com>

You could probably use scipy.base.polynomial, but it's easy enough to
implement a polynomial yourself.  Just use a dict-- each key represents
the power and each value the coefficient of the polynomial.

You didn't say exactly how efficient you need this.  It takes only a
couple seconds to sum 100 of the b(k)'s using the implementation below.
  This gets you roots out to about A=500.

Perhaps there are bugs in the below implementation.  Either way, you
can compare your results and its results and if they're not the same,
well then there's a problem.


------------------------------------------
from rational import rational #get from bitconjurer.org/rational.py

def add(a, b, s=1):
    c = {}
    for k, v in b.items():
        if not a.has_key(k):
            c[k] = s*v
    for k, v in a.items():
        vb = b.get(k, 0)
        c[k] = a[k] + s*vb
    return c

def raise1(a):
    b = {}
    for k, v in a.items():
        b[k+1] = v
    return b

def scale(a, s):
    b = {}
    for k, v in a.items():
        b[k] = v*s
    return b

def eval(x, p):
    s = 0.0
    for k, v in p.items():
        s = s + float(v.num)/float(v.den)*x**k
    return s

b = {-3 : {}, -2 : {}, -1 : {}, 0 : {0:rational(1,1)}, 1 : {}}

N = 100
for k in range(2,N):
    b[k] = scale(raise1(add(b[k-5],b[k-2],-1)),rational(1,k**2))
o = [b[0]]
for k in range(1, N):
    o.append(add(o[-1], b[k]))

for x in range(0,800):
    print x, eval(x, o[-3]), eval(x, o[-2]), eval(x, o[-1])
# o[-1],o[-2], and o[-3] start to split around x = 500



From steve at holdenweb.com  Mon Apr 25 12:45:18 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 25 Apr 2005 12:45:18 -0400
Subject: Injecting code into a function
In-Reply-To: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <d4j6h6$6de$1@sea.gmane.org>

George Sakkis wrote:
> Is there a general way of injecting code into a function, typically
> before and/or after the existing code ? I know that for most purposes,
> an OO solution, such as the template pattern, is a cleaner way to get
> the same effect, but it's not always applicable (e.g. if you have no
> control over the design and you are given a function to start with). In
> particular, I want to get access to the function's locals() just before
> it exits, i.e. something like:
> 
> def analyzeLocals(func):
>     func_locals = {}
>     def probeFunc():
>         # insert func's code here
>         sys._getframe(1).f_locals["func_locals"].update(locals())
>     probeFunc()
>     # func_locals now contains func's locals
> 
> So, how can I add func's code in probeFunc so that the injected code
> (the update line here) is always called before the function exits ?
> That is, don't just inject it lexically in the end of the function if
> there are more than one exit points. I guess a solution will involve a
> good deal bytecode hacking, on which i know very little; if there's a
> link to a (relatively) simple HOWTO, it would be very useful.
> 
> Thanks,
> George
> 
A decorator would seem to be the sensible way to do this, assuming you 
are using Python 2.4.

def decorated(func):
     def wrapper(arg1, arg2, arg3):
         print "Arg2:", arg2
         func(arg1)
         print "Arg3:", arg3
     return wrapper

@decorated
def f1(x):
     print "F1:", x

f1('ARG1', 'ARG2', 'ARG3')

Arg2: ARG2
F1: ARG1
Arg3: ARG3

All the decorator really does is compute one function from another. 
There's been enough discussion on the list recently that I won't repeat 
the theory.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From ville at spammers.com  Fri Apr 29 15:58:01 2005
From: ville at spammers.com (Ville Vainio)
Date: 29 Apr 2005 22:58:01 +0300
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
	<slrnd70bt5.d0e.davecook@localhost.localdomain>
	<mailman.39.1114802234.14961.python-list@python.org>
Message-ID: <du7pswdtkxi.fsf@mozart.cc.tut.fi>

>>>>> "John" == John J Lee <jjl at pobox.com> writes:

    John> Dave Cook <davecook at nowhere.net> writes:

    John> What are those compelling features of Pydev, for an emacs
    John> user?

http://pydev.sourceforge.net/features.html

Code completion and debugger are the most obvious ones. Eclipse itself
is also quite a "feature".

-- 
Ville Vainio   http://tinyurl.com/2prnb


From theoryboy at my-deja.com  Fri Apr 29 07:31:08 2005
From: theoryboy at my-deja.com (Peter Saffrey)
Date: 29 Apr 2005 04:31:08 -0700
Subject: Python site-packages and import
Message-ID: <ced73313.0504290331.6a0f39e4@posting.google.com>

(apologies for starting a new thread - Google can't retrieve the other
message for some reason)

Yes, /usr/lib/python/site-packages is in sys.path. This series of
commands should explain what I mean: I've put the Python ID3 module in
a sub-directory of site-packages as an illustration.

pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/
ID3.py  ID3.pyc  ID3.pyo  README  apt_inst.so  apt_pkg.so  apt_proxy 
bsddb3  debconf.py  debconf.pyc  debconf.pyo  id3  pj  twisted

pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/apt_proxy/
__init__.py   __init__.pyo  apt_proxy.pyc  apt_proxy_conf.py  
apt_proxy_conf.pyo  apt_proxytap.pyc  memleak.py   memleak.pyo 
misc.pyc  packages.py   packages.pyo
__init__.pyc  apt_proxy.py  apt_proxy.pyo  apt_proxy_conf.pyc 
apt_proxytap.py     apt_proxytap.pyo  memleak.pyc  misc.py     
misc.pyo  packages.pyc  twisted_compat

pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/id3       
ID3.py  ID3.pyc  ID3.pyo

pzs at bonnie:~$ python
Python 2.3.5 (#2, Feb  9 2005, 00:38:15) 
[GCC 3.3.5 (Debian 1:3.3.5-8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/lib/python23.zip', '/usr/lib/python2.3',
'/usr/lib/python2.3/plat-linux2', '/usr/lib/python2.3/lib-tk',
'/usr/lib/python2.3/lib-dynload',
'/usr/local/lib/python2.3/site-packages',
'/usr/lib/python2.3/site-packages']
>>> import apt_proxy.memleak
>>> import id3.ID3
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named id3.ID3
>>> 



Peter


From ville at spammers.com  Wed Apr  6 02:53:15 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 09:53:15 +0300
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <kLg3e.203$7b.56@trndny02>
	<424dc33c.55623752@news.oz.net>
Message-ID: <du74qekieg4.fsf@mozart.cc.tut.fi>

>>>>> "Bengt" == Bengt Richter <bokr at oz.net> writes:

    Bengt> I wonder if a dict with a general override hook for hashing
    Bengt> all keys would be useful.  E.g., a dict.__keyhash__ that
    Bengt> would take key as arg and default as now returning
    Bengt> key.__hash__() but that you could override. Seems like this

There would need to be an override hook for key comparison as well (I
suppose it always uses == operation now?). But yes, I think it would
be *much* more useful than any 'keytransform' feature - is there any
use for 'keytransform' feature apart from the uses that would be
better covered by hash/comparison hooks?

It would be lovely to have something like this in the stdlib (or
anywhere, for that matter). Think about the use cases for hashing via
by os.path.normcase, str.lower...

-- 
Ville Vainio   http://tinyurl.com/2prnb


From bokr at oz.net  Wed Apr  6 04:10:22 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 06 Apr 2005 08:10:22 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<mailman.1412.1112744591.1799.python-list@python.org>
	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>
Message-ID: <425394bd.436936831@news.oz.net>

On Wed, 06 Apr 2005 02:31:05 GMT, Ron_Adam <radam2 at tampabay.rr.com> wrote:

>On Tue, 05 Apr 2005 19:38:38 -0400, Steve Holden <steve at holdenweb.com>
>wrote:
>
>
>>> 
>>So what you are saying is that you would like to be able to use 
>>arbitrarily complex expressions after the :at" sign, as long as they 
>>return a decorator? If so, you've been "pronounced" :-)
>>
>>regards
>>  Steve
>
>No not at all,  I never said that.  But.. ;-)
>
>
>If we get into what I would like, as in my personal wish list, that's
>a whole other topic. <g>
>
>
>I would have preferred the @ symbol to be used as an inline assert
>introducer.  Which would have allowed us to put debug code anywhere we
>need.  Such as   @print total @.  Then I can switch on and off
>debugging statements by setting __debug__ to True or False where ever
>I need it.
>
>And as far as decorators go.  I would of preferred a keyword, possibly
>wrap, with a colon after it.  Something like this.

I don't understand your seeming fixation with wrappers and wrapping. That's not
the only use for decorators. See Raymond Hettinger's optimizing decorators
in the cookbook for instance. Decorators are something like metaclasses for functions,
with much more general possibilities than wrapping, IMO.

>
>def function_name(x):
>   return x 
>
>wrap function_name:
>   wrapper1()
>   wrapper2()
>   wrapper3()
>
>A wrap command could more directly accomplish the wrapping, so that
>def statements within def statements aren't needed. (Unless you
>want'ed too for some reason.)
I think you'll have to show some convincing use cases showing a clear
advantage over current decoration coding if you want converts ;-)

>
>And as far as arbitrary complex expressions go.. Actually I think that
>it's quite possible to do as it is. ;-)
Yes and no. You can always write @deco and refer to an arbitrarily complex
callable deco ..., but the actual @-line expression has to abide by the language grammar,
and that does not allow arbitrary expressions. But it does provide enough rope.
E.g. see my most recent reply to El Pitonero.

>
>But this is just a few of my current thoughts which may very well
>change.  It's an ever changing list. <g>
>
I can see that ;-)

Regards,
Bengt Richter


From jepler at unpythonic.net  Sun Apr  3 16:45:29 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 3 Apr 2005 15:45:29 -0500
Subject: Corectly convert from  %PATH%=c:\\X; "c:\\a;
	b"  TO  ['c:\\X', 'c:\\a; b']
In-Reply-To: <200504032012.j33KCqU17294@unpythonic.net>
References: <20050403150134.GA3398@unpythonic.net>
	<200504032012.j33KCqU17294@unpythonic.net>
Message-ID: <20050403204529.GC3398@unpythonic.net>

The C code that Python uses to find the initial value of sys.path based
on PYTHONPATH seems to be simple splitting on the equivalent of
os.pathsep.  See the source file Python/sysmodule.c, function
makepathobject().
        for (i = 0; ; i++) {
                p = strchr(path, delim); // ";" on windows, ":" on unix
                if (p == NULL) ...
                w = PyString_FromStringAndSize(path, (int) (p - path));
                if (w == NULL) ...
                PyList_SetItem(v, i, w);
                if (*p == '\0')
                        break;
                path = p+1;
        }
No special handling of quote characters happens here.

> I think I will stick to a simple splitting at the ;. Luckily all the
> directories I am dealing with have nice names.

If you do this, you'll match the behavior of python itself, and you'll match
the behavior of wine.

> I have not even tried to see what quirks there exist with unix.

None.  There's no way to quote anything in paths, so while you can't place a
directory with a colon in its name on your path, nobody loses any sleep over
it either.  Here's what the Open Group has to say about PATH:
    PATH
        This variable shall represent the sequence of path prefixes that
        certain functions and utilities apply in searching for an executable
        file known only by a filename. The prefixes shall be separated by a
        colon ( ':' ). When a non-zero-length prefix is applied to this
        filename, a slash shall be inserted between the prefix and the
        filename. A zero-length prefix is a legacy feature that indicates the
        current working directory. It appears as two adjacent colons ( "::" ),
        as an initial colon preceding the rest of the list, or as a trailing
        colon following the rest of the list. A strictly conforming application
        shall use an actual pathname (such as .) to represent the current
        working directory in PATH . The list shall be searched from beginning
        to end, applying the filename to each prefix, until an executable file
        with the specified name and appropriate execution permissions is found.
        If the pathname being sought contains a slash, the search through the
        path prefixes shall not be performed. If the pathname begins with a
        slash, the specified path is resolved (see Pathname Resolution). If
        PATH is unset or is set to null, the path search is
        implementation-defined.
ah, if only windows was so well-defined!

Jeff
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From michael.kearns at REMOVEsaaconsultants.com  Tue Apr 12 04:48:35 2005
From: michael.kearns at REMOVEsaaconsultants.com (Michael Kearns)
Date: Tue, 12 Apr 2005 09:48:35 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <425ad806$0$3146$8fcfb975@news.wanadoo.fr>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<425ad806$0$3146$8fcfb975@news.wanadoo.fr>
Message-ID: <425b8b32$0$38040$bed64819@news.gradwell.net>

Do Re Mi chel La Si Do wrote:
> Hi !
> 
> This DLL come also with MS-JVM engine, who is free.  Therefore...
> 

This is very true (and the .NET suggestion as well). However, why should 
I require an end-user to install MS-JVM or the .NET framework, purely 
for a simple little launcher application ?

The main application it launches is Java, but there's no way it would 
run on the MS-JVM, and .NET just gives a load more technology that we 
don't really need (and is a bigger install than the entire application).

Michael.


From glauco.silva at cenpra.gov.br  Fri Apr 15 09:21:31 2005
From: glauco.silva at cenpra.gov.br (Glauco Silva)
Date: Fri, 15 Apr 2005 10:21:31 -0300
Subject: problem with py2exe !
Message-ID: <022901c541be$0a13d230$e87290c8@piau>

Hi,
I?m with problem to create a executable program in python. 
I?m using py2exe but i don?t know if it?s right.
My setup.py:

from distutils.core import setup
import py2exe
from glob import glob

setup(
    # The first three parameters are not required, if at least a
    # 'version' is given, then a versioninfo resource is built from
    # them and added to the executables.
    version = "2.0",
    description = "programa InVesalius",
    name = "InVesalius",

    # targets to build
    console = ["C:\\promed2.0\\python\\MyMainModule.py"],
    data_files=[("icons", glob("C:\\promed2.0\\icons\\*.*")),
                ("docs",glob("C:\\promed2.0\\docs\\*.*")),
                ("config", ["C:\\promed2.0\\setup.cfg"])
                ],    
    packages = ['vtk-windows', 'vtk-windows.vtk',
                'vtk-windows.vtk.gtk', 'vtk-windows.vtk.qt',
                'vtk-windows.vtk.tk', 'vtk-windows.vtk.util',
                'vtk-windows.vtk.wx', 'vtk-windows.vtk.test'],  
    )
When i run in prompt "python setup.py py2exe", appear in the end this:

###########
The following modules appear to be missing
[ '_imaging_gif','libVTKCommonPython', 'libVTKContribPython', 'libVTKGraphicsPython', 'libVTKImagingPython', 'libVTKPatentedPython', libvtkCommonPython', 'libvtkFilteringPython', 'libvtkGraphicsPython', 'libvtkHybridPython', 'libvtkIOPython', 'libvtkImagingPython', 'libvtkParallelPython', 'libvtkPatentedPython', 'libvtkRenderingPython', 'numarray.array', 'numarray.dot', 'numarray.fromfile', 'numarray.size', 'numarray.zeros', 'vtk.vtkActor2D', 'vtk.vtkDCMParser', 'vtk.vtkImageClip', 'vtk.vtkImageFlip', 'vtk.vtkImageImport', 'vtk.vtkImageMagnify', 'vtk.vtkImageMapper', 'vtk.vtkImagePermute', 'vtk.vtkImageReader', 'vtk.vtkImageResample', 'vtk.vtkImageReslice', 'vtk.vtkImageShiftScale', 'vtk.vtkImageThreshold', 'vtk.vtkImageViewer', 'vtk.vtkImageWriter', 'vtk.vtkRenderWindow', 'vtk.vtkRenderer', 'vtk.vtkTextMapper', 'vtk.vtkTextProperty', 'vtk.vtkTransform']
###########

My PYTHONPATH = C:\Python23;C:\promed2.0\vtk-windows;C:\promed2.0\python

My dir:
##########
promed2.0/
               setup.cfg
               setup.py
               icons/
  
               docs/
 
               python/
                           MyMainModule.py
                 
               vtk-window/
                            vtkpython.py
                            vtkpythontk.py

                            vtk.pth
                            vtkCommon.dll
                            vtkCommonPython.dll
                            vtkCommonTCL.dll
                                           ...

                            vtk/ 
###########

OS: win 2K
Python ver: 2.3.5
py2exe ver: 0.5.4

How can i solve this problem?

Thanks
Glauco


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From grante at visi.com  Tue Apr  5 09:40:15 2005
From: grante at visi.com (Grant Edwards)
Date: Tue, 05 Apr 2005 13:40:15 -0000
Subject: How to merge two binary files into one?
References: <mailman.1340.1112663541.1799.python-list@python.org>
	<1153pu8pvom6b02@corp.supernews.com>
	<mailman.1344.1112666821.1799.python-list@python.org>
	<1153vfhid1vfif1@corp.supernews.com>
	<pan.2005.04.05.05.58.12.668596@dalkescientific.com>
Message-ID: <115559v197r5e5c@corp.supernews.com>

On 2005-04-05, Andrew Dalke <dalke at dalkescientific.com> wrote:
> Grant Edwards wrote:
>> For large files, something like this is probably a better idea:
>
> Or with the little-used shutil module, and keeping your
> nomenclature and block size of 65536

I knew I should have looked through shutil to see if there was
already something like that.

-- 
Grant Edwards                   grante             Yow!  MMM-MM!! So THIS is
                                  at               BIO-NEBULATION!
                               visi.com            


From jelleferinga at gmail.com  Tue Apr 26 11:52:37 2005
From: jelleferinga at gmail.com (jelle)
Date: 26 Apr 2005 08:52:37 -0700
Subject: how to pass an array to a VB array via COM
In-Reply-To: <mailman.2516.1114519612.1799.python-list@python.org>
References: <1114515084.138728.26180@g14g2000cwa.googlegroups.com>
	<mailman.2516.1114519612.1799.python-list@python.org>
Message-ID: <1114530757.278144.193980@o13g2000cwo.googlegroups.com>

No I haven't, it might be an idea.
Would it be an effective method though?
I have little experience working with COM, but i suppose writing an
(VB!) array wouldnt be the most challenging problem, though browsing
through this list it looks like no good solution arrived yet.

Cheers,

Jelle



From jarrod.roberson at gmail.com  Fri Apr 15 12:52:12 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 15 Apr 2005 09:52:12 -0700
Subject: How to fix this error in the example in 6.1.4 Files and Directories
Message-ID: <1113583932.703797.118610@o13g2000cwo.googlegroups.com>

the following code is from the Python 2.3.5 docs (
http://www.python.org/doc/2.3.5/lib/os-file-dir.html )

import os
from os.path import join, getsize
for root, dirs, files in os.walk('python/Lib/email'):
    print root, "consumes",
    print sum([getsize(join(root, name)) for name in files]),
    print "bytes in", len(files), "non-directory files"
    if 'CVS' in dirs:
        dirs.remove('CVS')  # don't visit CVS directories

every time I try and run it I get the following error

    print sum([getsize(join(root,name)) from name in files]),
                                           ^

the only change I made was the path supplied to os.walk()
I think this has to do something with the list comprehension syntax
and I am trying to learn that part, using this example which seems to
be broken.



From irmen.NOSPAM at xs4all.nl  Mon Apr  4 14:41:43 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Mon, 04 Apr 2005 20:41:43 +0200
Subject: setup distributed computing for two computer only
In-Reply-To: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>
References: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>
Message-ID: <42518a67$0$136$e4fe514c@news.xs4all.nl>

ajikoe at gmail.com wrote:
> Is there any one who has experiance about how to setup distributed
> computing for 2 computer only. I really want to know from the start.
> Any suggestion appreciated.

Please be more specific about "distributed computing"...

--Irmen


From could.net at gmail.com  Thu Apr  7 21:32:17 2005
From: could.net at gmail.com (could ildg)
Date: Fri, 8 Apr 2005 09:32:17 +0800
Subject: how can I extract all urls in a string by using re.findall() ?
In-Reply-To: <1112911984.035191.238350@f14g2000cwb.googlegroups.com>
References: <311b5ce105040619052e00e10c@mail.gmail.com>
	<mailman.1464.1112844596.1799.python-list@python.org>
	<1112911984.035191.238350@f14g2000cwb.googlegroups.com>
Message-ID: <311b5ce10504071832413fc32@mail.gmail.com>

I agree with Cappy2112.
I got more puzzled after I read the docs

On 7 Apr 2005 15:13:04 -0700, Cappy2112 <cappy2112 at gmail.com> wrote:
> >>Reading the documentation on re might be helpfull here :-P
> Many times, the python docs can make the problem more complicated,
> espcecially with regexes.
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


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


From whocaresrmb at yahoo.com  Thu Apr 21 14:14:16 2005
From: whocaresrmb at yahoo.com (Johnny Gentile)
Date: 21 Apr 2005 11:14:16 -0700
Subject: =?iso-8859-1?q?Re=3A_Good_morning_or_good_evening_depending_upon?=
	=?iso-8859-1?q?_your_location=2E_I_want_to_ask_you_the_most_import?=
	=?iso-8859-1?q?ant_question_of_your_life=2E_Your_joy_or_sorrow_for?=
	=?iso-8859-1?q?_all_eternity_depends_upon_your_answer=2E_The_quest?=
	=?iso-8859-1?q?ion_is=3A_Are_you_saved=3F_It_is_not_a_question_of_?=
	=?iso-8859-1?q?how_good_you_are=2C_nor_if_you_are_a_church_member?=
	=?iso-8859-1?q?=2C_but_are_you_saved=3F_Are_you_sure_you_will_go_t?=
	=?iso-8859-1?q?o_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST?=
	=?iso-8859-1?q?=B7146?=
In-Reply-To: <80jf61d89lccsd5j8otesssamm93ecni5i@4ax.com>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<80jf61d89lccsd5j8otesssamm93ecni5i@4ax.com>
Message-ID: <1114107256.963720.222660@o13g2000cwo.googlegroups.com>

You seem to have a lot of questions for someone who talks to God every
three minutes.
What do you guys do, discuss the Yankees or something?



From steven.bethard at gmail.com  Wed Apr  6 02:06:51 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 06 Apr 2005 00:06:51 -0600
Subject: "specialdict" module
In-Reply-To: <3bha55F6dj9omU2@individual.net>
References: <3bamhhF6j009lU1@individual.net> <3bha55F6dj9omU2@individual.net>
Message-ID: <soqdne-43JPn4c7fRVn-2w@comcast.com>

Georg Brandl wrote:
> Georg Brandl wrote:
> 
>>Hello,
>>
>>in follow-up to the recent "dictionary accumulator" thread, I wrote a
>>little module with several subclassed dicts.
>>
>>Comments (e.g. makes it sense to use super), corrections, etc.? Is this
>>PEP material?
>>
>>Docstrings, Documentation and test cases are to be provided later.
> 
> So, no further interest in this? Or should I write a PEP before?

I'd personally like to see a PEP.  It'd give people a chance to come up 
with some use cases that really justify adding such specialized dicts to 
the standard library.  The only use cases I can come up with would be 
better served by functions that take a sequence and produce a dict (e.g. 
by counting items or by grouping items into lists).  Once the dict is 
built, I usually have no more need for the default-specialized methods.

I'm sure there are some good use cases out there for such dicts, but 
before I get behind this, I wouldn't mind seeing a few of them. =)

STeVe


From radam2_ at _tampabay.rr.com  Sat Apr  9 05:29:25 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Sat, 09 Apr 2005 09:29:25 GMT
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com>
	<mailman.1603.1113027761.1799.python-list@python.org>
Message-ID: <851f51tlm6nl24mbnt6s7246akgk6ng6ro@4ax.com>

On Sat, 09 Apr 2005 02:22:45 -0400, Steve Holden <steve at holdenweb.com>
wrote:

>Ron_Adam wrote:
>> On Fri, 08 Apr 2005 05:15:23 -0400, vegetax <vegeta.z at gmail.com>
>> wrote:
>> 
>> 
>>>Are those issues being considered right now? i cant find any PEP addressing
>>>the issue especifically, at least cooking it for python 3000.
>>>
>>>specific topics could be:
>>>
>>>grouping related modules.
>>>removing useless legacy modules.
>>>refactoring duplicated functionality.
>>>removing/redesigning poorly written modules.
>>>adding a module versioning system.
>> 
>> 
>> I've been thinking that the lib directory could be better named and
>> rearranged a bit.  I sometimes mistakenly open the libs directory
>> instead of lib because of the name similarity.
>> 
>> An alternative might be to use the name "packs" or "packages" in place
>> of "lib", which would emphasize the use of packages as the primary
>> method of extending python. The standard library could then be a
>> package called "stdlib" within this directory. Third party packages
>> would then be along side "stdlib" and not within a directory that is
>> within the standard library.
>> 
>> It would be mostly a cosmetic change, but I believe it would be worth
>> doing if it could be done without breaking programs that may have hard
>> coded path references to the library.  :-/
>> 
>> Ron
>> 
>Ron:
>
>You do a lot of thinking, don't you? :-)

Just the way my mind works. ;-)

>This is a *very large* change, not a cosmetic one, requiring changes to 
>many installation routines (including, probably, distutils) and causing 
>problems for software that attempts to operate with multiple versions of 
>Python - and those projects have problems enough as it is despite 
>Python's quite fine record of careful development.

I thought it might be more involved than it seemed.

>This seems a rather high price to pay just to avoid having you 
>mistakenly avoid opening "libs" instead of "lib" - a distinction that is 
>only meaningful on Windows platforms anyway, I believe.

That's not surprising on windows.  

>You are correct in suggesting that the library could be better organized 
>than it is, but I felt we would be better off deferring such change 
>until the emergence of Python 3.0, which is allowed to break backwards 
>compatibility. So, start working on your scheme now - PEP 3000 needs 
>contributions. My own current favorite idea is to have the current 
>standard library become the "stdlib" package, but I'm sure a lot of 
>people would find that suggestion at least as half-baked as yours.

Yes, I agree, the "stdlib" should be a package.  So I don't find it
half-baked at all.  Packages are part of python, so python should take
advantage of them.  

As far as a organizing scheme, I've come to the conclusion, files
should be organized by who's responsible for them, as in who to
contact if something doesn't work correctly. And not allowing files to
be intermixed from different sources is definitely worth doing if
possible.  Something Windows does very very badly.

For Python, that would mean packages should be fully self contained
and don't move any files to other directories if possible. Which
simplifies installs, uninstalls, and upgrades. But it would require
much more than a cosmetic change, and more than the simple, or not so
simple, directory changes I suggested.

One of the tools I wrote in C (early 90's), was a make file maker. I
still have the source code here somewhere.  Starting with the main
source file and a template with the compile options in it, it searched
all included files recursively for references and built the make file
using the template.  It really made large projects easy.  I don't
think that's anything new now.  Dist tools should do something like
that to find needed files.  It shouldn't matter what directories they
are in as long as it has read access rights to them, or they are in
the search path, or there's a direct or indirect reference to them in
the source code someplace.

>{If an idea is more-half-baked than something exactly half-baked is it 
>0.4-baked or 0.6-baked? Does "more half-baked" actually mean "less baked"?)
>
>regards
>  Steve

All new ideas are un-baked, they aren't fully baked until they are old
ideas which have been implemented. So 0.6 baked is more than half
baked, and 0.4 baked is ... pudding. ;-)

I'll consider working on that PEP. It sounds like it might be a good
project for me. 

Cheers,
Ron





From mrovner at propel.com  Sat Apr 30 03:36:40 2005
From: mrovner at propel.com (Mike Rovner)
Date: Sat, 30 Apr 2005 00:36:40 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <1f7befae05043000165448b8d@mail.gmail.com>
References: <d4u60o$akh$1@news2.netvision.net.il>	<mailman.47.1114818531.14961.python-list@python.org>	<3dg5isF6qe1nhU1@news.dfncis.de>
	<d4v1an$j7q$1@sea.gmane.org>
	<1f7befae05043000165448b8d@mail.gmail.com>
Message-ID: <d4vc7d$83b$1@sea.gmane.org>

Tim Peters wrote:
> [Mike Rovner]
> 
>>3 IS wrong because if you use any not BIG letter after bodyguard on both
>>sides, you get extra 'eCQQmSXK\n' which slow me down for 5 minutes.
> 
> 
> Get rid of the newlines first.
> 
> On level 7, I'm not sure whether there's something more to do, or
> whether I'm looking at a bug in how IE displays .png files.  Using
> Windows is good practice in solving maddening riddles every day
> <wink>.

There is! That black and white line contains the message.

Mike



From cam.ac.uk at mh391.invalid  Tue Apr  5 18:29:45 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Tue, 05 Apr 2005 23:29:45 +0100
Subject: Best editor?
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <d2v3gs$p3j$1@gemini.csx.cam.ac.uk>

ChinStrap wrote:
> 
> Opinions on what the best is?

The best editor? Ed is the standard text editor. Accept no substitutes.
-- 
Michael Hoffman


From tjreedy at udel.edu  Thu Apr 21 17:52:27 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 17:52:27 -0400
Subject: __del__ and reference count problem
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be><1114107504.036833.109360@z14g2000cwz.googlegroups.com><4267f1e0$0$8871$636a15ce@news.free.fr>
	<1114116099.446355.13610@z14g2000cwz.googlegroups.com>
Message-ID: <d4972b$2oo$1@sea.gmane.org>


<ajikoe at gmail.com> wrote in message 
news:1114116099.446355.13610 at z14g2000cwz.googlegroups.com...
> it looks like we have to use other way, hold the data we want to
> preseve in an object, because it is possible the class is removed
> before the instance cleaned,

What is removed first is the binding between name A and the class object. 
But the class object still exists (its refcount is > 0) and can be accessed 
via the instance which has a reference to that class object.

Terry J. Reedy





From lbates at syscononline.com  Thu Apr 14 14:57:02 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 14 Apr 2005 13:57:02 -0500
Subject: distribute python script
In-Reply-To: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>
References: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>
Message-ID: <vPmdnUKBSeVrIcPfRVn-1Q@comcast.com>

py2exe works just fine, but you didn't give enough information for us
to help you.  Thomas Heller (maintainer of py2exe) monitors this list.
So post some more information of what "...caused a problem in my
script..." means and we will all try to help.

Larry Bates

codecraig wrote:
> i want to distribute my python script as an executable.  I have tried
> py2exe but it caused a problem in my script when I ran it.  I know
> about Gordon McMillans Installer (which is no longer hosted)..but i
> tried that and when i run the .exe it generated, it just crashes (i.e.
> Windows wants to send an error report).  Pyco is gone as well.
> 
> anyone?
> 


From littlejohn.75 at news.free.fr  Sun Apr 17 11:03:46 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 17 Apr 2005 15:03:46 GMT
Subject: module to parse "pseudo natural" language?
References: <d3thql$4rh$1@news.hispeed.ch>
Message-ID: <42627ad1$0$3573$626a14ce@news.free.fr>

Le Sun, 17 Apr 2005 13:38:09 +0200, Andrew E a ?crit :
> Hi all
> 
> I've written a python program that adds orders into our order routing
> simulation system. It works well, and has a syntax along these lines:
> 
>   ./neworder --instrument NOKIA --size 23 --price MARKET --repeats 20
> 
> etc
> 
> However, I'd like to add a mode that will handle, say:
> 
>   ./neworder buy 23 NOKIA at MKT x 20
> 
> I could enter several orders either by running multiple times, or use a
> comma-separated approach, like:
> 
>   ./neworder buy 23 NOKIA at MKT on helsinki, sell 20 NOKIA at market on
> helsinki
It would be simpler to have the rule : one line == one order, action,
command wahtever.
> 
> The thing about this is that its a "tolerant" parser, so all of these
> should also work:
> 
>   # omit words like "at", "on"
>   ./neworder buy 23 NOKIA mkt helsinki
> 
>   # take any symbol for helsinki
>   ./neworder buy 23 mkt helsinki
> 
>   # figure out that market=helsinki
>   ./neworder buy 23 NOKIA at market price
You have some variation of the same ? buy ? order. If you want to detail
the semantics :  you arrive to determine the different parameter of a
BuyCommand : what, where, how (many) ...
  This semantic is expressed differently in english, US-english, french
  ...
  If you base your parser on regex you see that the same BuyOrder is
  represented by a number of variant :
  Please, buy 23 NOKIA at market Helsinki
  Acheter 40 actions Bouygues ? la Bouse de Paris

So you have for a given environment (orders management module) a number
of commands expressed in pseudo-natural languages. Each command has a
certain number of attributes
  name, module_name, parameters, variants(list of regexps for instance),
  description, short description, sample sentence  (to be presented
  to the user in an interactive session if requested).
  An important attribute is naturally the action taken when the
  parser/interpreter matches the current line.

So you group the description of the Commands in an easy to parse file
and write an interpreter which on startup read such a file for the
Commands it understands : command to load a module, to list the commands
in the currently loaded module or in the interpreter, command to display
the sample, short or long description (help about cmd  or how to spell
cmd)., command to stop the interpreter (and the program) ...
command to read/include a file containings commands to parse and
execute.
  Python is dynamic, with setattr() you can easily construct a Command
  object from its description.

Here is what could be the description of a command to compute the
equilibrium position in a stability module (using a ?here? shell like
syntax ):
command equilibre << eoc
description << eod
La commande ? equilibre ? permet de lancer le calcul de la position
d'?quilibre du flotteur couramment d?crit.
position equilibre en partant de pqr 0.0/0.0/1.0 et h=8.500
les mots-cl?s sont equilibre pqr et h[=]
eod
sample <<eos
equilibre pqr 0.0/0.0/1.0 avec h=8.500
eos
#  name of function to call
action compute_equi
#  parameters of the command (a dictionary of parameters could be in
#  action's arguments
parameters << eop
pqr
h
eop
> 
# The regexpes
variants << eov
# the following regexp is with re.I (ignore case flag) :
variant I << eovi
equilibrer?\spqr\s+(?P<pqr>\d*\.\d*/\d*\.\d*/\d*\.\d*)\s+(?P<h>\d*\.\d*)
eovvi
#  syntax of regexp untested :-)
variant << eovi
equilibrium\spqr\s+(?P<pqr>\d*\.\d*/\d*\.\d*/\d*\.\d*)\s+(?P<h>\d*\.\d*)
eovvi
eov
eoc

> Thanks for any suggestions :)
> 
> Andrew


From sjmachin at lexicon.net  Thu Apr 14 18:30:56 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 15 Apr 2005 08:30:56 +1000
Subject: Get the entire file in a variable - error
References: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
Message-ID: <rrpt51p0rjrll71fv0p4u5hrq9juodv69i@4ax.com>

On 14 Apr 2005 07:37:11 -0700, martijn at gamecreators.nl wrote:

>H!
>
>I'm using a database and now I want to compress a file and put it into
>the database.
>
>So I'm using gzip because php can open the gzip file's.
>The only problem is saving the file into the database.
>
>The function below does this:
>- gzip the file [oke]
>- get all the bytes with tst.getvalue() [error]
>I only get the first line.
>
>I have the same problem when I try it with file.open(), .read().
>
>"how to get all the binary data in a variable to put that in a database
>LONG field?"
>
>Thank's
>
>def compressFILE(sid,filedata):
>    tst = StringIO.StringIO()
>
>    #tmp
>    zip = gzip.GzipFile(str(sid)+'.gz','w',5,tst)

According to the docs, it will convert your 'w' into 'wb'. That
shouldn't be your problem. However just because I'm paranoid doesn't
mean someone isn't out to get you, so change it to 'wb' anyway. It's
an extremely good habit to put the 'b' on whenever you are reading or
writing binary data.

>    zip.write(filedata)
>
>    #put every byte in a database
>    print tst.getvalue()

Here's your problem, being over-eager. Compressors that allow you to
feed them their input a spoonful at a time will maintain a large
amount of "state" and won't finish the job until you call their
close() method. Just like if you have a process writing a file to
disk, a second process trying to read the file before the first
process closes it is not in general guaranteed to see *any* of the
file's content, let alone all of it.

>
>    zip.close()
>    tst.close()

OK, now you can inspect the contents of "tst", write it to your
database, and then (and only then) worry about BLOBs and embedded
nulls and other nasties.

HTH,

John


From tzot at sil-tec.gr  Fri Apr 15 05:24:15 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 15 Apr 2005 12:24:15 +0300
Subject: curses for different terminals
References: <mailman.1917.1113496457.1799.python-list@python.org>
	<219t51pr0he28bke65jl2c1t0k5528qa7m@4ax.com>
	<mailman.1920.1113500009.1799.python-list@python.org>
Message-ID: <tf1v519p1dei5bsajgil08hd3s8rrna1nq@4ax.com>

On Thu, 14 Apr 2005 19:38:26 +0200, rumours say that harold fellermann
<harold.fellermann at upf.edu> might have written:

>> 1. Are you doing an single process application that produces output on
>> many terminals?  ie the program is kind of like a service?

>gotcha. I want to write a TCP server that handles incoming requests in
>threads (one thread per request using SocketServer.ThreadingTCPServer).
>Now, I want the server to use curses for client-server communication
>(client will be telnet). Thus, my programm runs in a single process
>(although several threads) and provides several curses screens (one for
>each client.)

I see.  At first, here is some relevant source from
Modules/_cursesmodule.c :

"""
A number of SysV or ncurses functions don't have wrappers yet; if you
need
a given function, add it and send a patch.  Here's a list of currently
unsupported functions:

    addchnstr addchstr chgat color_set define_key
    del_curterm delscreen dupwin inchnstr inchstr innstr keyok
    mcprint mvaddchnstr mvaddchstr mvchgat mvcur mvinchnstr
    mvinchstr mvinnstr mmvwaddchnstr mvwaddchstr mvwchgat
    mvwgetnstr mvwinchnstr mvwinchstr mvwinnstr newterm
    resizeterm restartterm ripoffline scr_dump
    scr_init scr_restore scr_set scrl set_curterm set_term setterm
    tgetent tgetflag tgetnum tgetstr tgoto timeout tputs
    vidattr vidputs waddchnstr waddchstr wchgat
    wcolor_set winchnstr winchstr winnstr wmouse_trafo wscrl
"""

So the answer is that, no, you can't use newterm currently.

But even if you did, it's not certain that you could use multiterminal
ncurses in a multithreaded environment; AFAIK in ncurses you just change
the "current" term and then go on with normal curses calls; is there a
"current" term per thread, or is there one per process?  I couldn't find
an answer in the short search I did.

I am afraid you will have to make it into a 3-tier arch; that is, your
server has the data model and absolutely no curses knowledge, and the
clients run a middle application, interfacing ncurses I/O and server
protocol.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From saint.infidel at gmail.com  Thu Apr 28 14:35:10 2005
From: saint.infidel at gmail.com (infidel)
Date: 28 Apr 2005 11:35:10 -0700
Subject: Getting the sender widget's name in function (Tkinter)
In-Reply-To: <opspvv1vyxrqur0o@eb.pragmadev>
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
	<1114547849.644971.191270@f14g2000cwb.googlegroups.com>
	<opspvv1vyxrqur0o@eb.pragmadev>
Message-ID: <1114713310.899563.285880@f14g2000cwb.googlegroups.com>

Here's a slight variation of tiissa's solution that gives the callable
a reference to the actual widget instead of just it's name:

from Tkinter import Tk, Button

class say_hello:
    def __init__(self, widget):
        self.widget = widget
    def __call__(self):
        print 'Hello,', self.widget['text']

def run():
    root = Tk()
    b1 = Button(root, text='Button 1')
    b1.configure(command=say_hello(b1))
    b1.pack()
    b2 = Button(root, text='Button 2')
    b2.configure(command=say_hello(b2))
    b2.pack()
    root.mainloop()

run()



From greg at cosc.canterbury.ac.nz  Wed Apr 20 01:47:45 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 17:47:45 +1200
Subject: packages
In-Reply-To: <42640829$0$4565$626a14ce@news.free.fr>
References: <4263FC93.5090104@mage.hu>
	<mailman.2060.1113849926.1799.python-list@python.org>
	<42640829$0$4565$626a14ce@news.free.fr>
Message-ID: <3cm8ofF6o3tkaU1@individual.net>

tiissa wrote:
> There is: see PEP 8.
> http://www.python.org/peps/pep-0008.html
> 
> However, I understood there was no definitive convention hence various 
> common styles.

I think this is a relatively recent development. At the
time the tutorial was written, and the older parts of
the standard library, there wasn't any established
convention.

Hopefully the stdlib naming will gradually get ironed
out as the oldest bits get deprecated. The tutorial
could probably do with being updated, too.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From radam2 at tampabay.rr.com  Tue Apr 26 17:32:02 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Tue, 26 Apr 2005 21:32:02 GMT
Subject: Fast plotting?
In-Reply-To: <rowen-608060.09385226042005@gnus01.u.washington.edu>
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
Message-ID: <mrybe.14493$716.10977@tornado.tampabay.rr.com>

Russell E. Owen wrote:
> Can anyone recommend a fast cross-platform plotting package for 2-D 
> plots?
> 
> Our situation:
> We are driving an instrument that outputs data at 20Hz. Control is via 
> an existing Tkinter application (which is being extended for this new 
> instrument) that runs on unix, mac and windows. We wish to update 5-10 
> summary plots at approximately 2 Hz and will be offering controls to 
> control the instrument and the plots, preferably (but not necessarily) 
> mixed in with the plots.
> 
> Ideally the package would create plots in the Tkinter application. But 
> we realize we're unlikely to get the speed we need that way. So we are 
> willing to have the Tkinter app send data to the plotting package  (e.g. 
> via a socket) and have it display the plots in a separate process.
> 
> We started out with matplotlib, which is a wonderful package (and well 
> integrated with most or all GUI toolkits). Unfortunately it is just too 
> slow -- at least when driving plots integrated with the Tkinter app. (It  
> is getting faster and so are computers, so at some point this will be a 
> great way to go. But for now...)
> 
> Any suggestions?
> 
> -- Russell

Have you looked at BLT?

http://sourceforge.net/projects/blt/
http://heim.ifi.uio.no/~hpl/Pmw.Blt/doc/







From cappy2112 at gmail.com  Mon Apr  4 01:38:03 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 3 Apr 2005 22:38:03 -0700
Subject: (win32) speedfan api control
In-Reply-To: <Kln3e.13905$e06.7165@twister.socal.rr.com>
References: <Kln3e.13905$e06.7165@twister.socal.rr.com>
Message-ID: <1112593083.067017.31810@l41g2000cwc.googlegroups.com>

Nice idea- getting the handle to a control.
But how do you know what to pass for wparam , lparam , flags ?

BTW- I don't see anything unique to Active Python here.
You can do all of this with the Python windows extensions, which can be
installed without Active Python.



From mwm at mired.org  Wed Apr 20 23:00:26 2005
From: mwm at mired.org (Mike Meyer)
Date: Wed, 20 Apr 2005 22:00:26 -0500
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <86k6mwu94l.fsf@guru.mired.org>

Antoon Pardon <apardon at forel.vub.ac.be> writes:

> Op 2005-04-20, Torsten Bronger schreef <bronger at physik.rwth-aachen.de>:
>> Hall?chen!
>>
>> nde at no.spam.org (Nick Efford) writes:
>>
>>> seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
>>>> Many people I know ask why Python does slicing the way it does.....
>>>
>>>> Can anyone /please/ give me a good defense/justification???
>>>
>>>> I'm referring to why mystring[:4] gives me elements 0, 1, 2 and 3
>>>> but *NOT* mystring[4] (5th element).
>>>
>>> mystring[:4] can be read as "the first four characters of
>>> mystring".  If it included mystring[4], you'd have to read it as
>>> "the first five characters of mystring", which wouldn't match the
>>> appearance of '4' in the slice.
>>>
>>> [...]
>>>
>>> It all makes perfect sense when you look at it this way!
>>
>> Well, also in my experience every variant has its warts.  You'll
>> never avoid the "i+1" or "i-1" expressions in your indices or loops
>> (or your mind ;).
>>
>> It's interesting to muse about a language that starts at "1" for all
>> arrays and strings, as some more or less obsolete languages do.  I
>> think this is more intuitive, since most people (including
>> mathematicians) start counting at "1".  The reason for starting at
>> "0" is easier memory address calculation, so nothing for really high
>> level languages.
>
> Personnaly I would like to have the choice. Sometimes I prefer to
> start at 0, sometimes at 1 and other times at -13 or +7.

Some HLLs have had arrays that let you declare the first index as well
as the size for decades now. Algol-68, for instance. Modern language
still offer such features, but none seem to have been very popular.

Of course, in any reasonable OO language, you can roll your own. So
the question comes down to whether or not these get into the standard
library.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From kasimov at i.com.ua  Thu Apr 28 05:10:29 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Thu, 28 Apr 2005 12:10:29 +0300
Subject: interactive web graphics
References: <mailman.2600.1114635374.1799.python-list@python.org>
	<d4p0dh$4lk$05$1@news.t-online.com>
Message-ID: <d4q9fs$3cj$1@news.tsystems.kiev.ua>


java are also wide-spread browser plugin with interactive and multimedia
capabilities,
and java-applets can be written with python (jython)

"Diez B. Roggisch" <deetsNOSPAM at web.de> wrote:
news:d4p0dh$4lk$05$1 at news.t-online.com...

> you are after _might_ be done using macromedia flash - as that is a
> wide-spread browser plugin with interactive and multimedia capabilities.
> But how to do it in flash I've no idea - after all I'm a pythoneer.


>
> Alternatively, SVG might be an option - but I'm not sure if its mature and
> powerful enough.
>
> --
> Regards,
>
> Diez B. Roggisch


--
Best regards,
Maksim Kasimov
mailto: kasimov at i.com.ua




From mauriceling at acm.org  Wed Apr 27 00:36:15 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 14:36:15 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org> <86is29n9cg.fsf@guru.mired.org>
	<d4l825$mj7$1@domitilla.aioe.org>
	<mailman.2525.1114534435.1799.python-list@python.org>
	<d4md4t$gfm$1@domitilla.aioe.org>
	<mailman.2548.1114556884.1799.python-list@python.org>
	<d4mrdf$jrc$1@domitilla.aioe.org> <86ekcxkk15.fsf@guru.mired.org>
Message-ID: <d4n4s4$7k8$1@domitilla.aioe.org>

Mike Meyer wrote:

> Maurice LING <mauriceling at acm.org> writes:
> 
> 
>>The idea of having to release the program or library as source files
>>does ring alarms in many executives in corporate world. Less freezing
>>the modules (which renders it platform dependent) or using Jython
>>(which is not possible when C extensions are involved), there is no
>>middle grounds in CPython for distribution without source codes.
> 
> 
> You're right - and byte codes *as they exist now* aren't an acceptable
> middle ground, either. The problem isn't that the interpreter might
> change (that can be defeated by distributing the interpreter with the
> bytecode files), but that the byte code can be decompiled to get your
> Python source back. See <URL:
> http://www.crazy-compilers.com/decompyle/ > for an example.

I know that bytecodes can be decompiled back to python source. Similarly 
Java class files can be decompiled back to Java source files quite 
easily. IANAL, however, I do think that reverse engineering can be seen 
as a purposeful act in the eyes of law. I remembered that EU Council 
Directive 9/250/ECC does explicits the allowable scope of decompilation 
(for interoperability, preserving expression of ideas, achieving 
performance of objectives).

For companies, I think it is touchy to ask permission to release the 
source codes even though they may be alright with releasing the same 
Java JAR file into the community.

We do know that regardless of whatever methods of compilation there may 
be, if some genius is willing to spend sufficient time to crack a 
program. Even if he has to read the binary codes, it will still break. 
But that is a wilfull act rather than just looking at the source codes 
when it is distributed with it. It's just like picking up your money 
from the ground if you had dropped it as compared to pickpocketing you 
as compared to hold you at knife point and robbing you...... Same end 
result but it is viewed differently in the eyes of law and morals.


> 
> Selling byte codes to someone who's worried about shipping source is
> selling them snake oil. I think it's unprofessional, at best.
> 
>         <mike


From roy at panix.com  Thu Apr 21 11:01:23 2005
From: roy at panix.com (Roy Smith)
Date: 21 Apr 2005 11:01:23 -0400
Subject: How can I verify that a passed argument is an interible
	collection?
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <d48f83$1ea$1@panix2.panix.com>

Charles Krug  <cdkrug at worldnet.att.net> wrote:
> Do I *coughs* simply *coughs* trap the exception created by:
>
>    for v in x:
>
>when v is a scaler quantity?

Sure.  Why not?  If you're coming from a type-bondage language like
C++ or Java, it probabliy feels strange, but it's the Python way.  It
looks like what you want to catch is TypeError.


From steve at holdenweb.com  Sat Apr 30 23:00:17 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 30 Apr 2005 23:00:17 -0400
Subject: Trying to write CGI script with python...
In-Reply-To: <1114907876.724509.122910@z14g2000cwz.googlegroups.com>
References: <mailman.9.1114734748.14961.python-list@python.org>	<1114803082.851505.149730@o13g2000cwo.googlegroups.com>	<1114806476.477679.150290@f14g2000cwb.googlegroups.com>
	<1114907876.724509.122910@z14g2000cwz.googlegroups.com>
Message-ID: <d51gci$t1$1@sea.gmane.org>

Jason Mobarak wrote:
> M.E.Farmer wrote:
> 
>>I found an excellent example that was posted by the F-bot.
> 
> [...]
> 
>>try:
>>    import myscript
>>    myscript.main()
>>except:
>>    print "Content-Type:", "text/html"
>>    print
>>    file = StringIO.StringIO()
> 
> 
> Note: it's usually a very bad idea to name -anything- "file" unless you
> intentionally want to clobber the name of the built-in file object.
> 
[...]
In fairness to the effbot I feel duty bound to suggest that the example 
may have been produced before file() was a built-in function. The effbot 
is usually reiable on programming matters.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From franz.steinhaeusler at utanet.at  Mon Apr  4 14:53:39 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhäusler)
Date: Mon, 04 Apr 2005 20:53:39 +0200
Subject: Eric3 under WinXP
Message-ID: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>

Hello NG,

(Win XP)

I have successfully installed pyqt, but not
qtext, which I need to run Eric3.
The PyQT demo files run fine.

I've downloaded QScintilla, compiled via MS-VC,
but (I suppose I need the SIG), to translate or provide
the Python interface with pyd Files.

Eric complains, that qtext is not found.

Has anyone success with getting this to work and how?

Many thanks in advance for possible answers,

-- 
Franz Steinh?usler

DrPython (Project Developer) 
http://mitglied.lycos.de/drpython/


From michele.simionato at gmail.com  Sat Apr  9 01:18:40 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Apr 2005 22:18:40 -0700
Subject: Python Equivalent to Java Interfaces?
In-Reply-To: <d37kmc$lrp$1@news-int2.gatech.edu>
References: <d37kmc$lrp$1@news-int2.gatech.edu>
Message-ID: <1113023920.372623.137890@o13g2000cwo.googlegroups.com>

Google for "Hettinger interface checking": the first hit
is the cookbook recipe you are looking for.

        Michele Simionato



From hancock at anansispaceworks.com  Mon Apr 11 17:02:11 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Mon, 11 Apr 2005 16:02:11 -0500
Subject: Parent module idea dropped? [Python import parent package]
In-Reply-To: <42568C37.7090201@geochemsource.com>
References: <mailman.1478.1112870310.1799.python-list@python.org>
	<425628FE.9080901@geochemsource.com>
	<42568C37.7090201@geochemsource.com>
Message-ID: <200504111602.11095.hancock@anansispaceworks.com>

On Friday 08 April 2005 08:50 am, Laszlo Zsolt Nagy wrote:
> 
> > So finally I got the answer: there was a "parent package" feature in 
> > the ni module but it was dropped of its awkwardness. This is not a big 
> > loss but this is exatly the feature that I need. Is there a person on 
> > this list who was against the "parent package" idea? He must know the 
> > answer or a workaround :-)
> 
> I just created a new module that can handle the 'from __.__.SomeModule 
> import SomeClass' notation.
> Keywords: Python import parent package
> What is the right place to make it available for others?

Well, generally speaking, it seems that most people would stick it on their
website and post a link here.  Or you could just post the text here as an
example (I imagine it's pretty short?).

I'd find it useful myself.

Cheers,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From ken at perfect-image.com  Sun Apr 10 16:02:27 2005
From: ken at perfect-image.com (Ken Godee)
Date: Sun, 10 Apr 2005 13:02:27 -0700
Subject: workaround for generating gui tools
In-Reply-To: <pan.2005.04.10.17.09.15.112872@jerf.org>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>	<3bqgh6F6larilU1@individual.net>	<mailman.1625.1113067362.1799.python-list@python.org>	<d3955k$kne$00$1@news.t-online.com>	<pan.2005.04.09.21.20.39.130792@jerf.org>	<d3b4b6$31o$00$1@news.t-online.com>
	<pan.2005.04.10.17.09.15.112872@jerf.org>
Message-ID: <42598653.4040306@perfect-image.com>

Jeremy Bowers wrote:
> On Sun, 10 Apr 2005 13:57:26 +0200, Diez B. Roggisch wrote:
> 
> 
>>>Domain-specific abstractions do that *faster* than GUI designers, not
>>>slower. And better, too, since every iteration tends to be fully
>>>functional and not just a "let's see what this looks like" prototype.
>>
>>Can you show me some working, in-use example for that?  I _seriously_ doubt
>>that the process of rearranging and tuning the layout can be done faster in
>>the text-world than with a good designer like qt-designer. But I'm all ears
>>for better solutions.
> 
> 
> Regrettably, no. I have them but they are all unsharable, either because
> the real owner would consider them proprietary, or because they are an
> unreleased and at the moment unfinished product I can't give the code out
> for.
> 
> But I can help some.
> 

This guys gotta be a politician or english major or something! :)

155 lines, 1706 words, 9493 character reply, but his method is so simple
he still can't show us an example!

The original poster was just asking for an example of
how to sub class his code generated form into his program
for easy future updates, a "VERY STANDARD" way of doing it.

I tried at first to follow this "Great Way" of doing it,
but I guess I'm to simple minded, or just got to damed borded.

Hey, that's just me. I guess I'll just be stuck zapping out
forms with qt designer, the old fashion way.





From eldiener_no_spam_here at earthlink.net  Fri Apr  8 12:42:17 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Fri, 08 Apr 2005 16:42:17 GMT
Subject: Installing Python 2.4 on Linux
In-Reply-To: <mailman.1409.1112744034.1799.python-list@python.org>
References: <mailman.1409.1112744034.1799.python-list@python.org>
Message-ID: <Jvy5e.2556$go4.1121@newsread2.news.atl.earthlink.net>

John Ridley wrote:
> --- Edward Diener <eldiener_no_spam_here at earthlink.net> wrote:
> [snip]
> 
>>I do not know whether this is a Python problem or a Fedora 3 problem
>>but 
>>I thought I would ask here first and see if anybody else had the same
>>
>>problem. I imagine the problem might exist on other Linux systems.
> 
> 
> On my Mandrake 10.1 system I have the default python 2.3 installation
> plus a separate python 2.4 installation which I compiled from source.
> There are two executables (python2.3 and python2.4) in /usr/bin, plus a
> hard-link (from python2.4) named python. If necessary, I could switch
> back to the default setup by replacing the hard-link with one from
> python2.3 - so the system would then have its preferred python version
> and I could selectively run python2.4 whenever appropriate. So far,
> Mandrake has not complained about using python 2.4 exclusively, so I
> might try removing the old installation eventually. (Then again, it's
> always handy to keep it for compatibility testing).

I need python to be python2.3 else many utilities no longer work. The 
problem is then using IDLE and pydoc for Python2.4 since neither are .py 
scripts and need python to be a link to python2.4 and not python2.3. I 
guess the solution is to write a script a shell script which links 
python to python2.4, run IDLE let's say, then link back to python2.3. 
However while I am doing this, other system facilities which depend on 
python to be python2.3 will be dead.


From __peter__ at web.de  Sat Apr 30 03:23:45 2005
From: __peter__ at web.de (Peter Otten)
Date: Sat, 30 Apr 2005 09:23:45 +0200
Subject: Micro-PEP: str.translate(None) to mean identity translation
References: <4272e00c.260731842@news.oz.net>
	<1114835238.762478.236940@o13g2000cwo.googlegroups.com>
Message-ID: <d4vbp3$6nd$02$1@news.t-online.com>

M.E.Farmer wrote:

> Bengt Richter wrote:
>> Just thought None as the first argument would be both handy and
> mnemonic,
>> signifying no translation, but allowing easy expression of deleting
> characters,
>> e.g.,
>>
>>    s = s.translate(None, 'badcharshere')
>>
>> Regards,
>> Bengt Richter
> 
> What's wrong with :
> 
> s = s.replace('badchars', "")
> 
> It seems obvious to replace a char ( to me anyway ) with a blank
> string, rather than to 'translate' it to None.
> I am sure you have a reason what am I missing ?
> M.E.Farmer

>>> s = "NHoBwA RyAoSuB AsAeHeH AiBtH,A CnRoAwD HyBoAuC HdRoCnH'AtB"
>>> s.translate(None, "BADCHARS")
"Now you see it, now you don't"
>>> s.replace("BADCHARS", "")
"NHoBwA RyAoSuB AsAeHeH AiBtH,A CnRoAwD HyBoAuC HdRoCnH'AtB"

i. e. you have to replace() for every char in "BADCHARS":

>>> reduce(lambda x, y: x.replace(y, ""), "BADCHARS", s)
"Now you see it, now you don't"


+1, btw.

Peter


From tzot at sil-tec.gr  Thu Apr 14 13:17:44 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 14 Apr 2005 20:17:44 +0300
Subject: curses for different terminals
References: <mailman.1917.1113496457.1799.python-list@python.org>
Message-ID: <219t51pr0he28bke65jl2c1t0k5528qa7m@4ax.com>

On Thu, 14 Apr 2005 18:39:14 +0200, rumours say that harold fellermann
<harold.fellermann at upf.edu> might have written:

>Hi all,

>I want to use curses in a server application that provides a GUI for 
>telnet clients. Therefore, I need the functionality to open and handle 
>several
>screens.

Just to make sure we understand what you want to do:

1. Are you doing an single process application that produces output on
many terminals?  ie the program is kind of like a service?

2. Are you doing an application with one session per terminal?  ie a
user starts your app in every terminal, no multi-term output from a
single process.

3. Are you doing an application that runs on one terminal but with many
"virtual" sessions (or screens), kind of like the `screen(1)` program or
the behaviour of the linux or Novell console?

>Concerning 
>http://dickey.his.com/ncurses/ncurses-intro.html#init
>this can be done using the function newterm(type,ofp,ifp). However, this
>function seems not to be defined in the python library. Does anyone know
>how this can be done in python?

Select one of the above, or describe more the desired situation if I
didn't cover your case, and we will try to help you more.

-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From danb_83 at yahoo.com  Fri Apr  8 04:38:35 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 8 Apr 2005 01:38:35 -0700
Subject: curious problem with large numbers
References: <mailman.1503.1112903288.1799.python-list@python.org>
Message-ID: <1112949515.151213.274340@o13g2000cwo.googlegroups.com>

Chris Fonnesbeck wrote:
> I have been developing a python module for Markov chain Monte Carlo
> estimation, in which I frequently compare variable values with a very
> large number, that I arbitrarily define as:
>
> inf = 1e10000

Don't forget that you can write your own Infinity.

(Warning: Buggy code, especially for unsigned Infinity)

class Infinity(object):
   def __init__(self, sign=1):
      self._sign = cmp(sign, 0)
   def __repr__(self):
      return "Infinity(%d)" % self._sign
   def __str__(self):
      if self._sign == 0:
         return "UInf"
      elif self._sign < 0:
         return "-Inf"
      else:
         return "+Inf"
   def __eq__(self, other):
      return isinstance(other, Infinity) and self._sign == other._sign
   def __ne__(self, other):
      return not (self == other)
   def __le__(self, other):
      if self._sign == 0:
         raise ValueError("Unsigned Infinity is incomparable")
      elif self._sign < 0:
         return True
      else:
         return False
   def __ge__(self, other):
      if self._sign == 0:
         raise ValueError("Unsigned Infinity is incomparable")
      elif self._sign < 0:
         return False
      else:
         return True
   def __lt__(self, other):
      return not (self >= other)
   def __gt__(self, other):
      return not (self <= other)
   def __add__(self, other):
      if isinstance(other, Infinity):
         if self._sign == other._sign:
            return self
         else:
            raise ValueError("%s + %s is undefined" % (self, other))
      else:
         return self
   __radd__ = __add__
   def __neg__(self):
      return Infinity(-self._sign)
   def __sub__(self, other):
      return self + (-other)
   def __rsub__(self, other):
      return -self
   def __mul__(self, other):
      return Infinity(self._sign * other)
   __rmul__ = __mul__
   def __div__(self, other):
      if instance(other, Infinity):
         raise ValueError("Inf/Inf is undefined")
      else:
         return Infinity(self._sign * other)
   __truediv__ = __div__
   __floordiv__ = __div__
   def __rtruediv__(self, other):
      return 0
   __rdiv__ = __rtruediv__
   def __rfloordiv__(self, other):
      if self._sign * cmp(other, 0) < 0:
         return -1
      else:
         return 0

POSITIVE_INFINITY = Infinity(1)
NEGATIVE_INFINITY = Infinity(-1)
UNSIGNED_INFINITY = Infinity(0)



From fuzzyman at gmail.com  Tue Apr  5 11:51:54 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Apr 2005 08:51:54 -0700
Subject: Python Google Server
In-Reply-To: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
Message-ID: <1112716314.193243.151820@f14g2000cwb.googlegroups.com>

Note - there are a couple of *minor* chanegs to this. See the online
python cookbok, the thread on comp.lang.python or
http://www.voidspace.org.uk/python/weblog/index.shtml



From jcribbs at twmi.rr.com  Tue Apr 26 20:36:41 2005
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Tue, 26 Apr 2005 20:36:41 -0400
Subject: ANN: KirbyBase 1.8.1
Message-ID: <426EDE99.5090402@twmi.rr.com>

KirbyBase is a simple, plain-text, database management system written in 
Python.  It can be used either embedded in a python script or in a 
client/server, multi-user mode.  You use python code to express your 
queries instead of having to use another language such as SQL.  
KirbyBase is disk-based, not memory-based.  Database changes are 
immediately written to disk.

You can find more information on KirbyBase at:
http://www.netpromi.com/kirbybase.html

You can download KirbyBase for Python at:
http://www.netpromi.com/files/KirbyBase_Python_1.8.1.zip

The credit for this release goes entirely to Pierre Quentel, the author 
of Karrigell (http://karrigell.sourceforge.net).  Pierre contributed 
every code change that made it into this version.  Thanks!

Changes in Version 1.8.1:

        -Added the ability to select, update, delete multiple records by
         specifying a list of record numbers.
        -Cleaned up the internals of _getMatchesByRecno by not splitting
         the record line into fields if user is selecting all records, and
         by using a generator to return matches instead of building a list
         of matches and returning the whole list.


Jamey Cribbs
jcribbs at twmi.rr.com




From phil at riverbankcomputing.co.uk  Thu Apr 28 02:29:27 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Thu, 28 Apr 2005 07:29:27 +0100
Subject: pyqt and Eric 3
In-Reply-To: <MPG.1cda18ed71afddc8989681@news2.atlantic.net>
References: <MPG.1cda1800975d5139989680@news2.atlantic.net>
	<MPG.1cda18ed71afddc8989681@news2.atlantic.net>
Message-ID: <200504280729.27459.phil@riverbankcomputing.co.uk>

On Thursday 28 April 2005 3:46 am, ChrisH wrote:
> In article <MPG.1cda1800975d5139989680 at news2.atlantic.net>,
> secun at yahoo.com says...
>
> > Are there any Eric 3 users out there?
> >
> > I've been thinking about trying it.
> >
> > Also, if I write scripts for internal use only at my company, do I have
> > to purchase a Qt or pyqt license?
> >
> > Thanks for the info!
> > Chris
>
> Oops.. I forgot to say I'm writing code for Windows.

Until the GPL versions of Qt4 and PyQt4 are available for Windows (and eric 
has been ported to it) you will need Qt and PyQt licenses.

Phil


From jepler at unpythonic.net  Wed Apr  6 11:03:48 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 6 Apr 2005 10:03:48 -0500
Subject: Resticted mode still active (error?)
In-Reply-To: <d30r27$m7t$1@news.mch.sbs.de>
References: <d30r27$m7t$1@news.mch.sbs.de>
Message-ID: <20050406150348.GF12835@unpythonic.net>

Is there a script that causes this problem, without using mod_python or
jepp?  If so, please attach it to the sourceforge bug.
http://sourceforge.net/tracker/index.php?func=detail&aid=1163563&group_id=5470&atid=105470
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From kretino at net.hr  Thu Apr 21 04:01:54 2005
From: kretino at net.hr (jozo)
Date: Thu, 21 Apr 2005 10:01:54 +0200
Subject: python LEX
Message-ID: <d47mli$d1v$1@bagan.srce.hr>

I have to work on python lexical definition in Lex. I spent lots of my
time to find regular expresions written for Lex of Python language but
nothing.
Can somebody help me?

I nEED hELP 




From strombrg at dcs.nac.uci.edu  Mon Apr  4 17:53:01 2005
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Mon, 04 Apr 2005 21:53:01 GMT
Subject: sparse sets of integers?
Message-ID: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>


Does anyone have a python implementation (or python C/C+ extension) that
would allow me to perform set operations (union, intersection, difference,
number of elements, &c) over very large collections of integers?

Some of the sets may have over 10**11 (probably less than 10**13
though) integers in them, but there will tend to be runs of integers being
included or not included, so there might be 10**5 consecutive integers
included, then 10**4 that are not included, and then another 10**6 that
are.

Is there such code already available?

I wrote something like this in C ages ago, but:

1) I no longer have the code
2) Who wants to work in C if you can do it fast enough in python anyway?  :)

Thanks!



From bj_666 at gmx.net  Sat Apr  2 11:33:47 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 02 Apr 2005 18:33:47 +0200
Subject: Performance issue
References: <mailman.1239.1112456748.1799.python-list@python.org>
	<424ec521$0$149$e4fe514c@news.xs4all.nl>
Message-ID: <pan.2005.04.02.16.33.45.680716@gmx.net>

In <424ec521$0$149$e4fe514c at news.xs4all.nl>, Irmen de Jong wrote:

>> words = file.splitlines()
> 
> You can obtain this list without reading the file in its entirety,
> by using the readlines method of file objects:
> 
> words=open("words.txt").readlines()

This leaves the newline characters at the end of each line while
`str.splitlines()` removes them.

Ciao,
	Marc 'BlackJack' Rintsch


From paul at fxtech.com  Thu Apr 28 11:14:45 2005
From: paul at fxtech.com (Paul Miller)
Date: Thu, 28 Apr 2005 10:14:45 -0500
Subject: anonymous functions/expressions without lambda?
Message-ID: <W47ce.375$Jb6.363@fe63.usenetserver.com>

I see lambda is "going away", so I want to use something that will be 
around for awhile.

All I want to do is provide an "inline function" as an argument to 
another function.

For example, let's say I have a function which binds a key to a function 
call. I want to do something "simple" in this function call, and I have 
a lot of bindings, so I don't want to have a ton of tiny little 
functions scattered around:

	def setVarTo1():
		foo.var = 1
	def setVarTo2():
		foo.var = 2

	bind('a', setVarTo1)
	bind('b', setVarTo2)

Instead, I'd like to do something like this:

	bind('a', foo.var = 1)
	bind('b', foo.var = 2)

What's the recommended way to do something like this?

Note that the bind function is implemented in "C", and I am embedding 
the interpreter.



From ahmedt at gmail.com  Wed Apr 20 15:40:08 2005
From: ahmedt at gmail.com (ahmedt at gmail.com)
Date: 20 Apr 2005 12:40:08 -0700
Subject: What's the difference between these 2 statements?
In-Reply-To: <4266ad9f$0$14218$636a15ce@news.free.fr>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
Message-ID: <1114026007.999930.12850@f14g2000cwb.googlegroups.com>

I'm sorry, I'm not really following your logic. Can you supply the
statement with the three parameters ?

so if I want to reverse it fully using s[len(s)-1:x:-1] what would x be
or is it impossible to express it in this way ?

Thanks,
AT



From sjmachin at lexicon.net  Fri Apr 29 18:10:33 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 30 Apr 2005 08:10:33 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<a6v2711u3hft7ed2ft95gqiggi2cnaak2r@4ax.com>
	<32r471h0nnq5aieeip6p83bpo54fcv9ooq@4ax.com>
Message-ID: <b995711n9svdg1ajo5v63b2457u5j30odi@4ax.com>

On Fri, 29 Apr 2005 18:54:54 GMT, Peter A. Schott
<paschott at no.yahoo.spamm.com> wrote:

>That looks promising.

> The field numbers are pre-defined at the mainframe level.

Of course. Have you managed to acquire a copy of the documentation, or
do you have to reverse-engineer it?

>This may help me get to my ultimate goal which is to pump these into a DB on a
>row-by-row basis ( :-P  ) 

That's your *ultimate* goal? Are you running a retro-computing museum
or something? Don't you want to *USE* the data?

> I'll have to do some playing around with this.  I
>knew that it looked like a dictionary, but wasn't sure how best to handle this.
>
>One follow-up question:  I'll end up getting multiple records for each "type".

What does that mean?? If it means that more than one customer will get
the "please settle your account" letter, and more than one customer
will get the "please buy a spangled fritzolator, only $9.99" letter,
you are stating the obvious -- otherwise, please explain.

>Would I be referencing these by row[#][field#]?

Not too sure what you mean by that -- whether you can get away with a
(read a row, write a row) way of handling the data depends on its
structure (like what are the relationships if any between different
rows) and what you want to do with it -- both murky concepts at the
moment.

>
>Minor revision to the format is that starts like:
>###,1,1,val_1,....

How often do these "minor revisions" happen? How flexible do you have
to be? And the extra "1" means what? Is it ever any other number?

>
>
>I think right now the plan is to parse through the file and insert the pairs
>directly into a DB table.  Something like RowID, LetterType, date, Field#,
>Value.

Again, I'd recommend you lose the "Field#" in favour of a better
representation, ASAP.

>  I can get RowID and LetterType overall, date is a constant, the rest
>would involve reading each pair and inserting both values into the table.  Time
>to hit the books a little more to get up to speed on all of this.

What you need is (a) a clear appreciation of what you are trying to do
with the data at a high level (b) then develop an understanding of
what is the underlying data model (c) then and only then worry about
technical details.

Good luck,
John




From __peter__ at web.de  Wed Apr 27 03:27:09 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 27 Apr 2005 09:27:09 +0200
Subject: python equivalent of php implode
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<mailman.2520.1114531188.1799.python-list@python.org>
	<8664y8lyb2.fsf@guru.mired.org>
	<d4ndag$2st8$1@news.tsystems.kiev.ua>
Message-ID: <d4nerk$mav$01$1@news.t-online.com>

Maxim Kasimov wrote:

> i'm tying to run example, and then get a traceback. am i something missed?
> 
> mysql> create table tmp_tmp (id int not null auto_increment primary key,
> sd varchar(255) not null default '', si int not null default 1);
> 
>>>> import MySQLdb
>>>> db = MySQLdb.connect("localhost", "login", "password", "dbname")
>>>> c  = db.cursor()
>>>> query_param = {
> ... 'sd' : 'somedata',
> ... 'si' : 2,
> ... }
>>>> table = 'tmp_tmp'
>>>> keys = query_param.keys()
>>>> values = query_param.values()
>>>> sql = "INSERT INTO %s (%s) values (%s)" % (table, ", ".join(keys), ",
> ".join(["?"] * len(keys))    )
>>>> c.execute(sql, values)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/lib/python2.2/site-packages/MySQLdb/cursors.py", line
>   95,
> in execute
>     return self._execute(query, args)
>   File "/usr/local/lib/python2.2/site-packages/MySQLdb/cursors.py", line
> 108, in _execute
>     self.errorhandler(self, ProgrammingError, m.args[0])
>   File "/usr/local/lib/python2.2/site-packages/MySQLdb/connections.py",
>   line
> 33, in defaulterrorhandler
>     raise errorclass, errorvalue
> _mysql_exceptions.ProgrammingError: not all arguments converted

Try another paramstyle (see http://python.org/peps/pep-0249.html), e. g.

... ",".join(["%s"] * len(keys)) ...

instead of

... ",".join(["?"] * len(keys)) ...

Peter





From vincent at visualtrans.de  Mon Apr 11 01:08:17 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Mon, 11 Apr 2005 07:08:17 +0200
Subject: help with wxPython and wxGrid
References: <LNWdnelNabejW8TfRVn-tg@comcast.com>
Message-ID: <d3d0o2$7hd$1@news4.zwoll1.ov.home.nl>

"Sam the Cat" <sam_spam_cat at comcast.net> schrieb im Newsbeitrag 
news:LNWdnelNabejW8TfRVn-tg at comcast.com...
| using "from wxPython.wx import *" under python2.3 I cannot seem to find 
the
| wxGrid class -- it says its undefined -- am I missing something obvious ? 
I
| know the globalspace import is not the best, but that how I got started
| ;) -- any help owuld be appreciated
|
|

Try:

from wxPython.wx import *
from wxPython.grid import *

or

import wx
import wx.grid

--
Vincent Wehren 




From rune.strand at gmail.com  Tue Apr 12 18:06:30 2005
From: rune.strand at gmail.com (runes)
Date: 12 Apr 2005 15:06:30 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <1113340181.174797.132250@f14g2000cwb.googlegroups.com>

> why cannot this piece of shit writing give a single example of usage?


Actually, I can understand your frustration even if you should enhance
your vocabulary slightly. I often struggle with the Python
documnetation myself and I can't understand why a couple of  examples
are so hard to give. When I laernt PHP I used the resources at php.net
exclusively, and that's because of the plenty of examples and the
newbie friendlyness.  Recently I struggled with the regex module and
found the the documentation being close to worthless. I'm not a CS guy,
I may have a harder fight grasping concepts. The re documentation, like
much Python documentation seems to be written with other people than my
kind in mind. Luckily I found this regex howto:
http://www.amk.ca/python/howto/regex/ and that helped a lot. In
addition, Mr. Magnus Lie Hetland coincidentally  posted a question on
this list that got answers that helped me out.
(http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/734cdb90078d5298/fc4c56ca66231d7f?q=Hetland&rnum=2#fc4c56ca66231d7f)



From steve at holdenweb.com  Tue Apr  5 03:32:47 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 03:32:47 -0400
Subject: Insert database rows from CSV file
In-Reply-To: <bp2451l8psd6qnid15jpmv0ooipqsl95b0@4ax.com>
References: <d2sb9901nlr@enews3.newsguy.com>	<CuSdndFAEfVYIczfRVn-iw@comcast.com>	<d2sgje01vc1@enews3.newsguy.com>
	<bp2451l8psd6qnid15jpmv0ooipqsl95b0@4ax.com>
Message-ID: <d2teqt$vuk$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Mon, 4 Apr 2005 15:54:37 -0700, "3c273" <nospam at nospam.com> declaimed
> the following in comp.lang.python:
> 
> 
>>Thanks for the link, but this is the step I am trying to save (for someone
>>else). Every time he goes to run a report, he must stop and import any new
>>csv files. Since the files are generated by a Python script, I thought I
> 
> 
> 	That information wasn't supplied in the original message. Your
> original post implied that the data source /was/ the CSV file...
> 
> 	Show us the code segment that is writing the CSV file, and we
> can probably show you the DB-API equivalent for "writing" a new record
> to the table.
> 
> For short however:
> 
> aCustomer = "Customer1"
> theWidget = "Widget1"
> aQuantity = 1000
> 
> # I'm presuming the table only has the three columns, since you didn't
> list fields
> cursor.execute(""" INSERT INTO "Table1" Values (%s, %s, %s) """,
> 		(aCustomer, theWidget, aQuantity))

Beware, however, that the parameter markers ("%s" in the example above) 
will depend on which database module you use - some modules will expect 
"?", for example. This depends on the module's "paramstyle".

Also, don't forget to commit the changes!

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bokr at oz.net  Sun Apr 24 01:01:32 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 24 Apr 2005 05:01:32 GMT
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
Message-ID: <426b255d.375304108@news.oz.net>

On Sat, 23 Apr 2005 22:45:14 -0400, Richard Blackwood <richardblackwood at cloudthunder.com> wrote:

>Robert Kern wrote:
>
>> Richard Blackwood wrote:
>>
>>> To All:
>>>
>>>    Folks, I need your help. I have a friend who claims that if I write:
>>>
>>> foo = 5
>>>
>>> then foo is NOT a variable, necessarily. If you guys can define for 
>>> me what a variable is and what qualifications you have to back you, I 
>>> can pass this along to, hopefully, convince him that foo is indeed a 
>>> variable.
>>
>>
>> None of us can do that unless you tell us what he thinks the word 
>> "variable" means. The terminology is a bit fluid. I suspect that your 
>> friend applying a somewhat restricted notion of "variable" that 
>> coincides with the behavior of variables in some other language.
>>
>Indeed, this language is math. My friend says that foo is a constant and 
>necessarily not a variable. If I had written foo = raw_input(), he would 
>say that foo is a variable. Which is perfectly fine except that he 
>insists that since programming came from math, the concept of variable 
>is necessarily the identical. This can not be true. For example, I may 
>define foo as being a dictionary, but I can not do this within math 
>because there is no concept of dictionaries within mathematics; yet foo 
>is a variable, a name bound to a value which can change.

Maybe he doesn't know that foo = 5 in Python is not an equation as in math,
but a Python source language statement to be translated to a step in some
processing sequence.

Tell him in Python foo is a member of one set and 5 is a member of another,
and foo = 5 expresses the step of putting them into correspondence
to define a mapping, not declaring them equal.

Even in math notation, ISTM important to distinguish between
a finger and what it may for the moment be pointing at.

Regards,
Bengt Richter


From storchaka at ksf.kiev.ua  Mon Apr 18 11:30:50 2005
From: storchaka at ksf.kiev.ua (Serhiy Storchaka)
Date: Mon, 18 Apr 2005 18:30:50 +0300
Subject: pre-PEP: Simple Thunks
In-Reply-To: <Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
Message-ID: <d40jrb$ir$1@news.tsystems.kiev.ua>

Brian Sabbey wrote:
> do f in with_file('file.txt'):
>     print f.read()

def with_file(filename):
     f = open(filename)
     yield f
     f.close()

for f in with_file('file.txt'):
     print f.read()

> t = "no file read yet"
> do f in with_file('file.txt'):
>     t = f.read()

t = "no file read yet"
for f in with_file('file.txt'):
     t = f.read()

--
Serhiy Storchaka


From steve at holdenweb.com  Mon Apr  4 11:20:34 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 04 Apr 2005 11:20:34 -0400
Subject: Newsgroup Programming
In-Reply-To: <MoidnRMFi75tddLfRVn-gg@wideopenwest.com>
References: <MoidnRMFi75tddLfRVn-gg@wideopenwest.com>
Message-ID: <d2rls6$i62$2@sea.gmane.org>

Chuck wrote:
> I've found and used the nntplib module for newgroup programming.  Can anyone 
> suggest a library, technique or reference on how to combine mutliple 
> messages with attachments such as mp3's, .wmv, *.avi, etc.? 
> 
> 
Are you talking about reconstructing a long post like a .avi that has 
been split up into separate messages?

If so then you'll need to concatenate all the message bodies and use 
uudecode on the result, I suspect.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From harold.fellermann at upf.edu  Thu Apr  7 07:22:04 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Thu, 7 Apr 2005 13:22:04 +0200
Subject: richcmpfunc semantics
In-Reply-To: <3bkgpnF6d50ppU1@individual.net>
References: <mailman.1443.1112810784.1799.python-list@python.org> 
	<3bkgpnF6d50ppU1@individual.net>
Message-ID: <dcf914fbcb29c672a9d06a47c331357f@upf.edu>

Thank you Greg,

I figured most of it out in the meantime, myself. I only differ
from you in one point.

>> What has to be done, if the function is invoked for an operator
>> I don't want to define?
>
> Return Py_NotImplemented. (Note that's return, *not* raise.)

I used

PyErr_BadArgument();
return NULL;

instead. What is the difference between the two and which one
is to prefer. Also, do you need to increment the reference count
of Py_NotImeplemented before returning it?

Thanks,

- harold -

--
I like pigs. Dogs look up to us. Cats look down to us.
Pigs treat us as equal.
-- Winston Churchill



From rkoida at yahoo.com  Tue Apr 19 23:49:31 2005
From: rkoida at yahoo.com (rkoida at yahoo.com)
Date: 19 Apr 2005 20:49:31 -0700
Subject: How to Convert a makefile to Python Script
Message-ID: <1113968971.081613.140640@l41g2000cwc.googlegroups.com>

Hello All
   I am working on a Problem to convert makefile in to a python script.
Are there any Modules? Please try to comment.

Thanks
rkoida



From sjmachin at lexicon.net  Fri Apr 29 18:59:11 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 30 Apr 2005 08:59:11 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
Message-ID: <v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>

On Fri, 29 Apr 2005 23:21:43 +0100, Michael Hoffman
<cam.ac.uk at mh391.invalid> wrote:

>John Machin wrote:
>> [Michael Hoffman]:
>> 
>>>for row in csv.reader(fileinput.input()):
>> 
>> csv.reader requires that if the first arg is a file that it be opened
>> in binary mode.
>
>fileinput.input() is not a file.

Hair-splitter. fileinput opens its files in text mode.

It's an awk simulation and shouldn't be used for real-world data.

>
>I have tested this code and it works fine for the provided example.

Well I've got news for you: real-world data has embedded CRs, LFs and
(worst of all) ^Zs often enough, and you won't find them mentioned in
any documentation, nor find them in examples.




From sjmachin at lexicon.net  Wed Apr 27 08:15:56 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 27 Apr 2005 22:15:56 +1000
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
	<8d7dabda.0504261239.37952804@posting.google.com>
	<8aft611878hr6d3an0n55rbk23mm71hpht@4ax.com>
	<1114568185.015176.238000@g14g2000cwa.googlegroups.com>
Message-ID: <h4uu615taeb5dsr1vkb5af8mr05nrpk63e@4ax.com>

On 26 Apr 2005 19:16:25 -0700, dmbkiwi at gmail.com wrote:

>
>John Machin wrote:
>> On 26 Apr 2005 13:39:26 -0700, dmbkiwi at gmail.com (dumbkiwi) wrote:
>>
>> >Peter Otten <__peter__ at web.de> wrote in message
>news:<d4l92e$9di$05$1 at news.t-online.com>...
>> >> Dumbkiwi wrote:
>> >>
>> >> >> Just encode the data in the target encoding before passing it
>to
>> >> >> os.popen():
>>
>> >
>> >Anyway, from your post, I've done some more digging, and found the
>> >command:
>> >
>> >sys.setappdefaultencoding()
>> >
>> >which I've used, and it's fixed the problem (I think).
>> >
>>
>> Dumb Kiwi, eh? Maybe not so dumb -- where'd you find
>> sys.setappdefaultencoding()? I'm just a dumb Aussie [1]; I looked in
>> the 2.4.1 docs and also did import sys; dir(sys) and I can't spot it.
>
>Hmmm. See post above, seems to be something generated by eric3.  So
>this may not be the fix I'm looking for.
>
>>
>> In any case, how could the magical sys.setappdefaultencoding() fix
>> your problem? From your description, your problem appeared to be that
>> you didn't know what encoding to use.
>
>I knew what encoding to use,

Would you mind telling us (a) what that encoding is (b) how you came
to that knowledge (c) why you just didn't do

test = os.popen('kdialog --inputbox %s'
%(data.encode('that_encoding'))) 

instead of

test = os.popen('kdialog --inputbox %s' %(data.encode('utf-8'))) 

> the problem was that the text was being
>passed to kdialog as ascii.

It wasn't being passed to kdialog; there was an attempt which failed.

>  The .encode('utf-8') at least allows
>kdialog to run, but the text still looks like crap.  Using
>sys.setappdefaultencoding() seemed to help.  The text looked a bit
>better - although not entirely perfect - but I think that's because the
>font I was using didn't have the correct characters (they came up as
>square boxes).

And the font you *were* using is what? And the font you are now using
is what? What facilities do you have to use different fonts?

>>
>> What is the essential difference between
>>
>>    send(u_data.encode('polish'))
>>
>> and
>>
>>    sys.setappdefaultencoding('polish')
>>    ...
>>    send(u_data)
>
>Not sure - I'm new to character encoding, and most of this seems like
>black magic to me.

The essential difference is that setting a default encoding is a daft
idea. 


>
>>
>> [1]: Now that's *TWO* contenders for TautologyOTW :-)
>> 

Before I retract that back to one contender, I'll give it one more
shot:

1. Your data: you say it is Polish text, and is utf-8. This implies
that it is in Unicode, encoded as utf-8. What evidence do you have?
Have you been able to display it anywhere so that it "looks good"?
If it's not confidential, can you show us a dump of the first say 100
bytes of text, in an unambiguous form, like this:

print repr(open('polish.text', 'rb').read(100))

2. Your script: You say "I then manipulate the data to break it down
into text snippets" - uh-huh ... *what* manipulations? Care to tell
us? Care to show us the code?

3. kdialog: I know nothing of KDE and its toolkit. I would expect
either (a) it should take utf-8 and be able to display *any* of the
first 64K (nominal) Unicode characters, given a Unicode font or (b)
you can encode your data in a legacy charset, *AND* tell it what that
charset is, and have a corresponding font or (c) you have both
options. Which is correct, and what are the details of how you can
tell kdialog what to do -- configuration? command-line arguments?

HTHYTHYS,

John


From jacob at cd.chalmers.se  Sun Apr  3 18:57:33 2005
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: 3 Apr 2005 22:57:33 GMT
Subject: Europython 2005 is now accepting talk submissions
Message-ID: <mailman.1297.1112621141.1799.python-announce-list@python.org>


Europython 2005 is now accepting talk submissions!

Find out more at http://www.europython.org

Just as last year, we have a Refereed Paper Track. Last day for
proposing a refereed paper is 22 April 2005.

For regular talks, we have the following tracks:
Business
Education
Python Frameworks
Python Language
Science
Social skills and General Topics
Zope/Plone

We also have a special track for "Misfits" this year. It is
for any topic that is Python related but doesn't fit in
any of the above categories.

Last day for submitting talks to the regular tracks is
1 May 2005.

On top of this, we will have two tracks of Lightning Talks;
one for Zope/plone and one for other topics. You can register
talks for these all the time until the Lightning Talk
sessions end, or the schedule is filled, whichever comes first.

Europython 2005 will be held 27-29 June at the Chalmers University
of Techchnology, G?teborg, Sweden. Registration will open in
mid-April.

We hope this will become the best Europython Conference ever!
With your help it can. We are still seeking volunteers to help
us with a number of things. We have a recent vacancy as track
chair for Python Frameworks, and it is not too late to revive
the Applications Track. We also need people to help out in the
reception during the conference. Send an email to 
europython at python.org.

Jacob Hall?n
Head organiser

-- 


From finite.automaton at gmail.com  Tue Apr 26 16:58:23 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 26 Apr 2005 13:58:23 -0700
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <1114549103.844774.178070@o13g2000cwo.googlegroups.com>

A quick, hackish way to keep a static variable is to declare it as a
parameter and give it a default value.  The parameter list is evaluated
when the function is compiled, not when it is called.   The underscores
are added as per convention to indicate that the variable is
special/private.

Example-

def cumulative_sum(arg, __static__ = []):
    __static__.append(arg)
    return reduce(lambda a,b: a + b, __static__)

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

>>> cumulative_sum(1)
1
>>> cumulative_sum(1)
2
>>> cumulative_sum(1)
3



From fred.dixon at gmail.com  Tue Apr 12 21:08:51 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 12 Apr 2005 18:08:51 -0700
Subject: sort of a beginner question about globals
Message-ID: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>

i have read the book and searched the group too
----------------------------------------------
im not gettin it.
i want to read a global (OPTIONS) from file1 from a class method
(func1) in file2
i want to understand how this works.


----------------------------------------------
#file1.py
import file2
import sys

OPTION = sys.argv[1:]
pass
a=global2.class1()
a.func1()


#file2.py
import __main__
pass
class class1:
.    def func1(self):
.        pass
-------------------------------------------



From hoel at gl-group.com  Mon Apr 18 08:00:33 2005
From: hoel at gl-group.com (=?iso-8859-15?q?Berthold_H=F6llmann?=)
Date: Mon, 18 Apr 2005 14:00:33 +0200
Subject: compiling python 2.4.1 on Linux_X86_64 using PGI compiler fails
Message-ID: <sezmvwb8gu.fsf@pc047299.dhcp.germanlloyd.org>


I am trying to compile Python on an Opteron machine using the PGI C
compiler under Linux. I use:

CC=pgcc ./configure  --prefix=/usr/local/gltools/python/Python-2.2.1 \
   --exec-prefix=/usr/local/gltools/python/Python-2.2.1/$GL_ARCH \
   --with-cxx=pgCC

but make fails with:

pgCC  -Xlinker -export-dynamic -o python \
                Modules/ccpython.o \
                libpython2.4.a -lpthread -ldl  -lpthread -lutil   -lm  
libpython2.4.a(posixmodule.o)(.text+0x38d6): In function `posix_tmpnam':
: warning: the use of `tmpnam_r' is dangerous, better use `mkstemp'
libpython2.4.a(posixmodule.o)(.text+0x3841): In function `posix_tempnam':
: warning: the use of `tempnam' is dangerous, better use `mkstemp'
case $MAKEFLAGS in \
*-s*)  CC='pgcc' LDSHARED='pgcc -shared' OPT='-DNDEBUG -O' ./python -E ./setup.py -q build;; \
*)  CC='pgcc' LDSHARED='pgcc -shared' OPT='-DNDEBUG -O' ./python -E ./setup.py build;; \
esac
make: *** [sharedmods] Error 139

and issuing the last command from the command line gives:

>  CC='pgcc' LDSHARED='pgcc -shared' OPT='-DNDEBUG -O' ./python -E ./setup.py build
Segmentation fault (core dumped)

This is with PGI 5.2 and 6.0.

Has anyone compiled python successfully using PGI compilers under 64
bit Linux. If yes, what are the neccesarry switches?

Thanks
Berthold
-- 
hoel at GL-Group.com              __   Address:
                            G /  \ L Germanischer Lloyd
phone: +49-40-36149-7374    -+----+- Vorsetzen 35       P.O.Box 111606
fax  : +49-40-36149-7320      \__/   D-20459 Hamburg    D-20416 Hamburg


From philippe at philippecmartin.com  Sun Apr 24 12:54:20 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Sun, 24 Apr 2005 16:54:20 GMT
Subject: Using Ming on Windows
References: <d4ea01$m02$1@sea.gmane.org>
	<mailman.2356.1114287722.1799.python-list@python.org>
Message-ID: <0bQae.51$461.1@newssvr11.news.prodigy.com>

I never managed to link my python extensions (mingw .a) with python and
broke down and bought Visual/C++ as it is the compiler used by Python.

Yet some people seem to have managed:
http://uucode.com/texts/python-mingw/python-mingw.html

Regards,

Philippe



Jack Diederich wrote:

> On Sat, Apr 23, 2005 at 05:13:29PM -0300, Andr? Roberge wrote:
>> I tried to install Ming
>> (http://sourceforge.net/projects/ming/)
>> on Windows to use with Python *but*
>> I can't [/don't know how to] use "make" to install it.
>> 
>> Does anyone know where I could find a ready-made compiled
>> version for Windows to just "put in" my site-packages directory.
>> 
>> Any help would be appreciated.
>> 
> Ming seems to be abandoded/unsupported.  Use groups.google.com to
> find some hints on how to install it.  I've done it on linux, but
> never tried on windows (why would I?) and replied with some
> suggestions last time it came up on c.l.py
> 
> -jackdied



From sizer at nospam.com  Tue Apr 19 16:42:03 2005
From: sizer at nospam.com (Sizer)
Date: 19 Apr 2005 15:42:03 -0500
Subject: Extending base class methods
References: <1113919270.802463.54310@l41g2000cwc.googlegroups.com>
Message-ID: <Xns963D8B9217239sizernospamcom@216.40.28.86>

henrikpierrou at hotmail.com wrote in
news:1113919270.802463.54310 at l41g2000cwc.googlegroups.com: 
> Any ideas why this does not work? I get the error "TypeError: unbound
> method printer() must be called with Field_Collection instance as
> first argument (got MSD instance instead)"):
> 
> 
> #======================================================================
> =============== class Field_Collection:
>     fieldList = []
> 
>     def add(self, name, size, compression, responseValue, value,
> description):
>         self.fieldList.append( Field(name, size, compression,
> responseValue, value, description) )
> 
>     def update(self):
>         print "updating field"
> 
>     def get(self):
>         print "getting field"
> 
>     def printer(self):
>         for x in self.fieldList:
>             x.printer()
> 
> 
> #======================================================================
> =============== 
> 
> 
> class MSD(Field_Collection):
>     standard = ""
>     decField = ""
> 
>     def printer(self):
>         print "Standard: " + self.standard
>         print "decField: " + self.decField
>         Field_Collection.printer(self)
> 
> #======================================================================
> =============== 
> 
> w2k, python 2.3
> 


I added these lines to your code:

foo = MSD()
foo.printer()

And it worked perfectly (python 2.3.3). You would get that error if you 
accidentally did something like:

foo = MSD()
MSD.printer()   # oops, should be foo.printer()



From mwm at mired.org  Tue Apr 26 22:55:13 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 21:55:13 -0500
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org>
	<hpivj2-lh1.ln1@lairds.us> <86y8b6o8pw.fsf@guru.mired.org>
	<1114487173.272526.13670@o13g2000cwo.googlegroups.com>
	<V2nbe.73933$xJ7.4988028@phobos.telenet-ops.be>
	<86acnln8wi.fsf@guru.mired.org>
	<POpbe.74075$lL3.4833408@phobos.telenet-ops.be>
Message-ID: <86acnlkjxq.fsf@guru.mired.org>

Roel Schroeven <rschroev_nospam_ml at fastmail.fm> writes:

> Mike Meyer wrote:
>>>In that case, it seems to be a better idea to check the version of
>>>vmstat that's on the system. At least, I presume that such differences
>>>in behaviour can be deduced from the vmstat version string.
>> Hmm. That doesn't seem to work here:
>> guru% vmstat --version
>> vmstat: illegal option -- -
>> usage: vmstat [-aimsz] [-c count] [-M core [-N system]] [-w wait]
>>               [-n devs] [disks]
>
> The version on Debian Woody uses -V:
>
> $ vmstat -V
> procps version 2.0.7
>
> Apparently it is quite a different program than yours; the -V option
> is cleary labeled in the man page, and it supports much less options:

-V doesn't work here:
guru% vmstat -V
vmstat: illegal option -- V
usage: vmstat [-aimsz] [-c count] [-M core [-N system]] [-w wait]
              [-n devs] [disks]

Of course, you could use the fact that various things *don't* work
as a hint to what version of vmstat you have. I'd be interested in
what other BSD's did - especially with "what $(which vmstat)".

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tpherndon at gmail.com  Sun Apr 17 19:18:54 2005
From: tpherndon at gmail.com (Peter Herndon)
Date: 17 Apr 2005 16:18:54 -0700
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <7tj2619vr3b49iealucjcqacic9d067ndr@4ax.com>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>
	<42603197.9090002@egenix.com>
	<mailman.1988.1113604089.1799.python-list@python.org>
	<7tj2619vr3b49iealucjcqacic9d067ndr@4ax.com>
Message-ID: <1113779934.308133.27690@z14g2000cwz.googlegroups.com>

I switched around the order, both in the actual application and in my
tests as replied to Francois Lepoutre above.  Results were consistent,
after the first run of any given test, which unsurprisingly took a bit
longer.



From nospam at here.com  Wed Apr 20 13:40:56 2005
From: nospam at here.com (Matt Feinstein)
Date: Wed, 20 Apr 2005 13:40:56 -0400
Subject: goto statement
References: <mailman.2158.1113989043.1799.python-list@python.org>
Message-ID: <vu4d6151aqk22ug97147sg7e6prikcjt68@4ax.com>

On Wed, 20 Apr 2005 10:23:58 +0100 (BST), praba kar
<prabapython at yahoo.co.in> wrote:

>Dear All,
>
>   In Python what is equivalent to goto statement

I'd like to that implemented in an interpreted language. Requires some
time travel.

Matt Feinstein

--
There is no virtue in believing something that can be proved to be true.


From mage at mage.hu  Thu Apr 21 10:19:27 2005
From: mage at mage.hu (Mage)
Date: Thu, 21 Apr 2005 16:19:27 +0200
Subject: goto statement
In-Reply-To: <fb6605670504210703cb52e7e@mail.gmail.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<fb6605670504210703cb52e7e@mail.gmail.com>
Message-ID: <4267B66F.5040504@mage.hu>

Michael Soulier wrote:

>On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
>  
>
>>but what if i just can't to do this becouse i'm working thrue ssh, and have to use 
>>only installed editors (such as vi)
>>    
>>
>
>Then learn to use vi. 
>
>:.,+10s/^/#
>" comment the next 10 lines
>  
>
Or if you don't like that you can use sftpfs with gui editor.

       Mage


From noemail at noemail.com  Tue Apr 12 18:47:57 2005
From: noemail at noemail.com (Jim)
Date: Tue, 12 Apr 2005 18:47:57 -0400
Subject: How to debug SOAP using TCpMon and Python?
Message-ID: <wNydnQ8ROuBR0sHfRVn-qw@rogers.com>

Hello,

I am trying to debug a Python SOAP
application using tcpmon. I am wondering what
listen port, target port number and host
address should I use.

What about optional parameters: Http Proxy
support, host and port?

My PC is behind a firewall.


Thanks for your help.

Jim





From gene.tani at gmail.com  Sat Apr  9 00:55:01 2005
From: gene.tani at gmail.com (gene.tani at gmail.com)
Date: 8 Apr 2005 21:55:01 -0700
Subject: Python Equivalent to Java Interfaces?
In-Reply-To: <d37kmc$lrp$1@news-int2.gatech.edu>
References: <d37kmc$lrp$1@news-int2.gatech.edu>
Message-ID: <1113022501.240371.97120@g14g2000cwa.googlegroups.com>

There's 4 places to look: zope, twisted, PEAK and pyProtocols: this
link describes pyprotocols pretty well

http://peak.telecommunity.com/protocol_ref/module-protocols.html
http://peak.telecommunity.com/PyProtocols.html



From hancock at anansispaceworks.com  Wed Apr 20 18:04:40 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 20 Apr 2005 17:04:40 -0500
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <d463fn$kd7$1@panix2.panix.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
Message-ID: <200504201704.40894.hancock@anansispaceworks.com>

On Wednesday 20 April 2005 12:28 pm, Roy Smith wrote:
> Terry Hancock wrote:
> >> I used to make "off by one" errors all the time in both C and Fortran,
> >> whereas I hardly ever make them in Python. 
> 
> Part of the reason may be that most loops over lists involve
> iterators, 

> both endpoints are mentioned explicitly.  C++/STL also uses iterators,
> but the syntax is repulsive.

That's true of course.  It's more likely to show up in manipulating
lists or strings.  And Python provides a much richer environment for
processing strings, so one has to deal with explicit indexing much
less.

But I still think that I make fewer error per instance of dealing with
intervals. It's rare that I even have to think about it much when
writing such a thing.   Negative indexing also helps a lot.

Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From ivoras at _-_fer.hr  Fri Apr 29 14:12:17 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Fri, 29 Apr 2005 20:12:17 +0200
Subject: Reusing object methods?
In-Reply-To: <mailman.36.1114798257.14961.python-list@python.org>
References: <mailman.36.1114798257.14961.python-list@python.org>
Message-ID: <d4tte9$amf$1@bagan.srce.hr>

Jp Calderone wrote:

>> I want to 'reuse' the same method from class A in class B, and without 
>> introducing a common ancestor for both of them - is this possible in 
>> an elegant, straightforward way?
> 
> 
>  This is what sub-classing is for.  If it makes you feel better, call it 
> "mixing in" instead.  You can share this method between two classes 
> without inheritance (by defining a free function and then ...), but 
> using a common base class really is just the right way to do it.

Ok.


From ramon.aragues at gmail.com  Thu Apr 21 14:15:02 2005
From: ramon.aragues at gmail.com (ramon.aragues at gmail.com)
Date: 21 Apr 2005 11:15:02 -0700
Subject: Persistent python object and the Web
Message-ID: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>

Hi,

I'd like to know if I am trying to do something impossible or I am just
being unable to find how to do it. In the latter case, please... help
me...

I?ve implemented a python class Graph, which handles graphs (with its
nodes, edges, finding paths, etc). In my text-menu interface, I can add
nodes, delete nodes, add edges, find shortest routes, etc. I simply
create a graph_object before presenting the text menu and then, when a
user choses a command (eg. add-node) I call the method of this object
with the appropiate parameters.

Now... I need to "translate" this text-menu interface  to a web
interface. The same as the text-menu interface, but letting the user do
it through the web. I have created an HTML that lets the user enter the
parameters and chose which command to execute by pushing different
buttons. But...

My problem is that I don't know how to create a graph_object that
remains persistent through time (it has to be the same graph_object for
the first command as for the last one "pushed" by the user). I want to
be able to create the object when the user enters the web page (by
calling graph_object = Graph(id="graph1")) and then make calls to
graph_object methods when the user pushes a button.

I'm using python2.3, mod_python and Apache.

Any help will be greatly appreaciated.

Ramon



From axel at straschil.com  Mon Apr 11 04:14:47 2005
From: axel at straschil.com (Axel Straschil)
Date: 11 Apr 2005 08:14:47 GMT
Subject: Multiple inheritance: Interface problem workaround,
	please comment this
References: <slrnd5am6f.7ed.axel@m2.sine> <ybCdnTBdnr30w8jfRVn-pQ@comcast.com>
	<slrnd5c9qk.9rm.axel@m2.sine>
	<1112963912.909325.186760@f14g2000cwb.googlegroups.com>
	<slrnd5fusg.h7p.axel@m2.sine>
	<1113062849.105547.229830@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd5kcfm.ckp.axel@m2.sine>

Hallo!

> Look at the comment in the code! I have posted the "decorate" module in

Uuups, sorry, I'll RTFM myselfe *g*

Lg,
AXEL.
-- 
"Aber naja, ich bin eher der Forentyp." Wolfibolfi's outing in 
http://www.informatik-forum.at/showpost.php?p=206342&postcount=10


From draghuram at gmail.com  Thu Apr 28 10:18:28 2005
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 28 Apr 2005 07:18:28 -0700
Subject: Question about python code distribution...
In-Reply-To: <vamdnY5DgJLcfu3fRVn-vA@comcast.com>
References: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
	<vamdnY5DgJLcfu3fRVn-vA@comcast.com>
Message-ID: <1114697908.282178.266840@f14g2000cwb.googlegroups.com>

Hi,

I would like for all platforms, not just for windows. In any case, the
above two replies about "zipfile" support and "eggs" answer my
question. That's exactly what I was looking for. Thanks for prompt and
useful responses. 

Raghu.



From alex at quad.com.ar  Wed Apr 27 12:39:30 2005
From: alex at quad.com.ar (alex)
Date: Wed, 27 Apr 2005 13:39:30 -0300
Subject: Which IDE is recommended?
In-Reply-To: <200504271110.24334.jeffelkins@earthlink.net>
References: <426f90ac$1_2@rain.i-cable.com>
	<200504271110.24334.jeffelkins@earthlink.net>
Message-ID: <426FC042.1080805@quad.com.ar>

jeff elkins wrote:

>
>Is Boa actively used? There doesn't seem to be much activity its mailing list. 
>The tutorial fails for me using python 2.3.5, wxpython 2.5.3.2 and Boa 0.4.0 
>under debian sid.
>
>Jeff
>
>  
>
Boa is not a dead project if that's your concern, maybe it's not getting 
a lot of attention, but the cvs is getting some decent activity, 0.4.x 
was recently released, and I've seen some bug reports being fixed in cvs 
quite fast too.

It's really a great product if you can live with its poor documentation 
and its constraint-oriented design (as opposed to sizer oriented)
yes I know it supports sizers, but it wasn't designed for it, and you'll 
probably end up manually coding the sizers because the built-in support 
is really weird.

anyway,  I consider boa the best rad tool for wxpython, it could be 
better.. but it's still the best of its kind imho.

regards,
Alex Verstraeten.


From michele.simionato at gmail.com  Wed Apr 13 03:28:06 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 13 Apr 2005 00:28:06 -0700
Subject: win32 readline maintenance (was Re: IPython - problem with...
In-Reply-To: <du7pswz89e6.fsf_-_@lehtori.cc.tut.fi>
References: <3bv5mgF6jbil9U1@individual.net>
	<1113323786.737140.184800@o13g2000cwo.googlegroups.com>
	<mailman.1780.1113327396.1799.python-list@python.org>
	<du7pswz89e6.fsf_-_@lehtori.cc.tut.fi>
Message-ID: <1113377286.541980.68610@l41g2000cwc.googlegroups.com>

Switching to the US keyboard did not help for me.



From py.adriano at gmail.com  Sat Apr  9 13:36:59 2005
From: py.adriano at gmail.com (Adriano Monteiro)
Date: Sat, 9 Apr 2005 14:36:59 -0300
Subject: Help with modem terminal
Message-ID: <29ec2154050409103674b72340@mail.gmail.com>

Hey folks,

I need to talk to my modem through a terminal, so I can send commands
and get the answers. Does anybody here know what can I do?
I've tried to use pty.py, but I'm lost...

Regards,
[]'s!

-- 

Adriano Monteiro Marques
www.gopython.com.br
py.adriano at gmail.com

I'm FREE... Are you?
(PYTHON powered)


From tiissa at nonfree.fr  Wed Apr 20 15:35:51 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 21:35:51 +0200
Subject: pyGTK on Mouse over event ?
In-Reply-To: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
Message-ID: <4266af16$0$31058$626a14ce@news.free.fr>

Domenique.Tilleuil at gmail.com wrote:
> hello,
> 
> Is there an event simular to the java event onMouseOver ?
> I want to get the coordinates of the mouse pointer when it is over an
> image ( GTKImage widget)
> 
> I've tried using the EventBox with the motion_notify but that only
> seems to work when the mouse is pressed ?
> 
Why do you use an event box?
Image derives from Widget hence can be connected to the 
motion-notify-event just like EventBox. Did you try directly?


From kartic.krishnamurthy at gmail.com  Tue Apr  5 19:37:04 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 5 Apr 2005 16:37:04 -0700
Subject: Is it possible to distinguish between system environment
	variables and the user ones?
In-Reply-To: <mailman.1368.1112690534.1799.python-list@python.org>
References: <mailman.1368.1112690534.1799.python-list@python.org>
Message-ID: <1112744224.598681.89770@z14g2000cwz.googlegroups.com>

There is nothing that plainly differentiates whether an environment
variable is the system's or the current user's.

What you could do is:
1. Get the list of environment variables for the user the script is
executing as.
2. Use the pywin32 extensions to access the registry key
HKCU\Environment
3. Lookup the environment variables present in the list (Item 1)  that
appear as string values under HKCU\Environment.
4. The intersecting list belongs to the user, the rest can be surmised
as belonging to the system environment.

Thanks,
--Kartic



From msoulier at gmail.com  Tue Apr 19 22:57:23 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Tue, 19 Apr 2005 22:57:23 -0400
Subject: Importing some functions from a py file
In-Reply-To: <20050420025217.46333.qmail@web54501.mail.yahoo.com>
References: <20050420025217.46333.qmail@web54501.mail.yahoo.com>
Message-ID: <fb660567050419195750dac9bf@mail.gmail.com>

On 4/19/05, Anthony Liu <antonyliu2002 at yahoo.com> wrote:
> 
> You are certainly right, because I don't know how to
> protect the main functions.  Where do I put
> 
> if __name__ == '__main__': main()

I just glanced in the modules section of the python documentation and
surprisingly this is not mentioned at all that I could see. I think
that's an oversight.

See this example:

http://diveintopython.org/getting_to_know_python/index.html

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'
Jabber: msoulier at digitaltorque.ca


From kay.schluehr at gmx.net  Sun Apr 24 02:11:38 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 23 Apr 2005 23:11:38 -0700
Subject: Variables
In-Reply-To: <mailman.2379.1114319143.1799.python-list@python.org>
References: <426B0283.40602@cloudthunder.com><d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net>
	<mailman.2379.1114319143.1799.python-list@python.org>
Message-ID: <1114323098.854687.27750@g14g2000cwa.googlegroups.com>

Richard Blackwood wrote:

> Could I honestly argue this to him? From what basis do I argue that
it
> is not an equation? In any event, he would likely (passionately)
> disagree considering his notion that programming is an off-shoot of
math
> and thus at the fundamental level has identical concepts and rules.

What is special on *equations* in mathematics is that both sides of an
equation are ususually not equal! Identifying an equational expression
"x=1" with the solutionset {1} of the equation is for convenience. For
more complex equational expressions, say "x**5+4x-1 = 0" You never
confuse the equation with the solution set. The solution set is nothing
but a set of values that if inserted into the equation would really
create equal terms on both sides i.e. "0=0" in our example.

To make a difference between an assignment and an equation it would be
better to use a different operator for an equation, say "==". Usually
"==" is interpreted in programming languages as a binary operator that
returns a boolean value. This is a usefull but narrow perspective that
is broken by many computer algebra systems like Mathematica that adapts
"==" to the the more general equational interpretation.

The interpretation of "x = 5" as defining a "constant" may stem from
languages ( Visual Basic ? ) that introduce a "var" keyword to make
variable creation explicit.

  var x = 7;

or

  var int x = 8;

In C You refuse "var" and restrict "immutable variables" i.e. constants
by means of the keyword "const".

In Python You can't define a "constant" by simply assign a value to
name. You can interpret assignment as creation of a variable of domain
object. Since each expression is an object You can drop "object" from
C-like definitions

  object x = 8

and reduce it to

  x = 8

To become more precise You have to do workarounds.

Ciao,
Kay



From donmcdaniel2005 at yahoo.com  Thu Apr 28 03:04:49 2005
From: donmcdaniel2005 at yahoo.com (Donald L McDaniel)
Date: Thu, 28 Apr 2005 00:04:49 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
Message-ID: <ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>

Matt Hayden wrote:
> Johnny Gentile wrote:
>> C'mon. Everyone knows God plays a Martin.
>
> I dunno.  I think God has a honkin' big collection so he won't offend
> ANY luthiers when they come to visit.  SOMEONE has to set up his
> guitars...
>
> mh

1) God is a Being Who lives in Eternity and Infinity.

2) God is not a man.  However, His Son, Christ Jesus, left the loftiness of 
Eternity and became a Man without losing His God-Substance  which He 
receives from His Father.  This means He is not just a man, but the God-Man.

3)He lived a pure, sinless life, and died on the Cross in our place, as the 
Sacrifice for our sins.  However, He did not remain in the Tomb HE was 
placed in after He was taken down from the cross by those who loved Him. 
Within three days, HE was raised from the dead by His Father, still the 
God-Man.  After 40 days on the earth, He was returned to the Father in His 
Body of flesh, tho now It was glorified (made eternal by the Father).  There 
He is to this very day, interceeding for those who have received Him as the 
Anointed One of God.

4) One day, hopefully, soon, He will return in Power and Glory to judge the 
thoughts of all men, and transfer His servants from their bodies of flesh to 
glorified bodies, like His.

Do not try to reason this out, since the Incarnation of Christ is not a 
thing of logic and reason, but a Holy Mystery, only comprehended by faith in 
those who have put their hope and trust in Him and His Sacrifice on the 
Cross.  Faith can easily be understood by a man with an open mind:  Let us 
say that there is a Sargent in the Army;  his commanding officer, a General, 
whose desk is a thousand miles away, and whom he has never seen, gives him a 
letter containing an order.  The Sargent's act of obedience to the order can 
be explained as "faith", since he never saw the General, and obeys him 
simply because he is his commanding officer.  While we have never seen the 
Father, we obey Him, because He sent a Man with orders from Him for His 
servants.

Not only that, but this simple faith is testified to by the Holy Spirit 
after we obey, and our steps of faith are rewarded with experiential 
knowledge of God, as we learn to recognise His Hand in our lives.  We obey 
God simply because His Son and servants tell us to.  Through time and 
experience, we have learned to trust His Words, because they come to pass, 
in His Time, and in His Way.

4) I doubt seriously whether God plays a guitar, since guitars are made by 
men, for men.  His Son could theoretically play a guitar.  Perhaps He does. 
Perhaps He doesn't.  Only the Father and His Holy Angels know.

-- 
Donald L McDaniel
Please reply to the original thread,
so that the thread may be kept intact.
============================== 




From steve at holdenweb.com  Tue Apr  5 19:23:52 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 19:23:52 -0400
Subject: IronPython 0.7 released!
In-Reply-To: <1f7befae05040512422ef693d4@mail.gmail.com>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
Message-ID: <42531E08.8060706@holdenweb.com>

Tim Peters wrote:
> [Thomas Gagne]
> 
>>Does the Python community think Microsoft's embrace is a good or bad thing?
> 
> 
> All things in this world unfold exactly according to Guido's secret
> Master Plan.  So it depends on whether you think Guido is good or bad.
>  Members of the Python community are required to think Guido is good. 
> Therefore all things that happen in this world are good.
> 
> I know, it takes a bit of practice to truly believe that <wink>.
> 
> not-mentioning-that-i-don't-feel-particularly-embraced-yet-ly y'rs  - tim

Presumably when we get past the embracing and on to the extending Barry 
can finally retrain Spambayes to reject penis enlargement emails?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From steve at holdenweb.com  Tue Apr 12 20:01:41 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 20:01:41 -0400
Subject: Cannot import mod_python modules
In-Reply-To: <6c9897c2.0504121428.4c7238a9@posting.google.com>
References: <6c9897c2.0504120255.1f274@posting.google.com>	<mailman.1752.1113311063.1799.python-list@python.org>
	<6c9897c2.0504121428.4c7238a9@posting.google.com>
Message-ID: <d3hnak$mn0$1@sea.gmane.org>

Mark wrote:
> Thanks for the reply Steve,
> 
> I have re-installed mod_python and re-configured Apache and it works
> now. I'm not exactly sure what I done differently, but oh well at
> least it works now :)
> 
> Regards,
> 
> Mark.

Right, no point wasting much sleep when mod_python awaits!

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From littlejohn at DeleteMe.knology.net  Sun Apr 10 10:33:41 2005
From: littlejohn at DeleteMe.knology.net (LittleJohn)
Date: Sun, 10 Apr 2005 09:33:41 -0500
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com> <86k6nbww6z.fsf@guru.mired.org>
Message-ID: <pan.2005.04.10.14.33.36.578791@DeleteMe.knology.net>

Mike Meyer wrote:

> For quick edits (as either root or me) I use ex. I can't get past ed
> not having a prompt.

For a Linux gui editor, try NEdit.  It's almost identical to the old PFE
editor for Windoze and it 'knows' Python.

LittleJohn
Madison, AL


From jstroud at mbi.ucla.edu  Thu Apr 21 17:46:05 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 21 Apr 2005 14:46:05 -0700
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
Message-ID: <200504211446.05189.jstroud@mbi.ucla.edu>

Is it relevant that Python can produce compiled expressions? I don't think 
that there is such a thing with Perl.

Also, to all of the dozen or so people in the world less wise than me about 
programming: don't choose your language on how fast the regex engine is. This 
would then become a case of premature optimization.

James

On Thursday 21 April 2005 10:23 am, Thomas Bartkus wrote:
> "djw" <dwelch at vcd.hp.com> wrote in message
> news:d48ktk$4ov$1 at news.vcd.hp.com...
>
> > While I agree with (most of) your points, one should not overlook the
> > fact that there are cases when performance does matter (huge datasets
> > maybe?). Since the OP didn't indicate why performance was important to
> > him/her, one cannot assume that its not a valid concern.
>
> Yes, yes, but then - the converse would be true.  One cannot assume it *is*
> a valid concern.
>
> I could have gone further and pointed out that that RegEx module (now re !)
> is probably just C code hooked to Python syntax.  IOW - the execution speed
> of his RegEx module has *nothing at all* to do with the Python language,
> only the efficiency of the particular code library he was using.
>
> All in all, execution speed for any one particular task is a sucky way to
> evaluate a general purpose programming language. If gonzo RegEx query
> performance was of utmost importance, would anyone put either of Perl or
> Python at the top of his list?
>
> Thomas Bartkus

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

http://www.jamesstroud.com/


From abkhd at earth.co.jp  Tue Apr 19 10:30:56 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 19 Apr 2005 07:30:56 -0700
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2056.1113844188.1799.python-list@python.org>
	<d42ilb$dk0$1@titan.btinternet.com>
Message-ID: <1113921056.163970.216730@g14g2000cwa.googlegroups.com>

Okay, let me have another stap at this.

As you have probably noticed MSVC6 is no longer actively supported as
far as Python 2.4 goes. The official distribution of Python 2.4 for
Windows is built using MSVC7.1 (or whatever you wish to call it).

We are told that building C extensions with MSVC6 for use in the
official Python 2.4 (which uses the MSVCR71) is not safe, and mixing
the different runtime libraries that your extension (or my extension)
with that which official Python 2.4 uses will/might cause crashes.
Google around for details on this.

So, what to do? You seem to have four options.

1. Get and use the MSVC7.1 compiler.
2. Get and use the freely distributed MS compiler.
3. Download the Python source[1] and compile it yourself in MSVC6
(there are project files in the source to enable you to do that). Then
use your MSVC6 to create the extension.
4. Get and use MinGW and pyMinGW[2]




Regards,
Khalid




[1] Check to see if your archiever tool is working, or get the source
from CVS.

[2] pyMinGW:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From lbates at syscononline.com  Mon Apr 11 09:47:31 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 11 Apr 2005 08:47:31 -0500
Subject: Document exchange!
In-Reply-To: <1113155501.394204.92470@o13g2000cwo.googlegroups.com>
References: <1113155501.394204.92470@o13g2000cwo.googlegroups.com>
Message-ID: <8vSdnXignqBt4sffRVn-pA@comcast.com>

You may want to take a look at www.websafe.com.  If I can be so
bold (since I'm one of the developers), we belive it is both simple
and secure.  We provide web, WebDAV, and HTTPS interfaces (I can
provide you with sample Python code).  At-rest encryption is AES.
It is a hosted ASP-type application with annual subscriptions.

Larry Bates

James wrote:
> This is not so much as a Python question though I will implement it in
> it.
> 
> I am looking to securely aggregate documents based on a metadata from
> multiple providers. I am getting the feeling that I am reinventing the
> wheel. If anyone knows similar work elsewhere, please point me to it.
> 
> Security and simplicity (is it possible to use the two in the same
> sentence? :-) ) of the protocol is king. I have the luxury of
> implementing any protocol I choose on each reposity.
> 
> Thanks,
> James
> 


From gfyho at yahoo.com  Wed Apr 27 15:19:01 2005
From: gfyho at yahoo.com (Gary)
Date: 27 Apr 2005 12:19:01 -0700
Subject: Design advice for unit test asserters
In-Reply-To: <874qdzpdrr.fsf@titan.staselog.com>
References: <1114085180.425079.302580@z14g2000cwz.googlegroups.com>
	<874qdzpdrr.fsf@titan.staselog.com>
Message-ID: <1114629540.972450.121850@g14g2000cwa.googlegroups.com>

First, thanks to both Kent and Edvard for useful comments.  I certainly
need to consider whether it make sense to switch to py.test at this
time; its simplicity is attractive.

In response to Edvards question:

Edvard Majakari wrote:
> "Gary" <gfyho at yahoo.com> writes:
...
> >          self.AssertAllFilesExist(fileList)
...
> >
> >      def test_SomeTest(...):
> >          ...
> >          [ self.AssertFileExists(f) for f in fileList ]
>
> I prefer the latter, because then you'd get error for the missing
file -
> otherwise you'd just know a file didn't exist (but not which, unless
you
> explicitly coded that in, no?)

Yes, my intent is that AssertAllFilesExist(fileList) would be something
like the following, more or less:

    def AssertAllFilesExist(fileList):
        for f in fileList:
            self.assert_(os.path.isfile(f) and not os.path.islink(f),
                         "File %s is missing" % f)

It's the smarts in these that caused me to instantly see applicability
of the Template Pattern - which became quite a distraction to me,
because after doing it, I think it was obviously unnecessary overkill.

Gary



From Serge.Orlov at gmail.com  Sun Apr  3 05:38:18 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sun, 3 Apr 2005 09:38:18 +0000 (UTC)
Subject: redundant imports
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<T9OdnU9kdqI2NNffRVn-ow@powergate.ca>
	<i4V2e.1146141$35.42440149@news4.tin.it>
	<86zmwgx0he.fsf@guru.mired.org>
Message-ID: <d2odia$aa0$1@news.comcor-tv.ru>

Mike Meyer wrote:

> The semantic behavior of "include" in C is the same as "from module
> import *" in python. Both cases add all the names in the included
> namespace directly to the including namespace. This usage is
> depreciated in Python ...

 Did you mean discouraged? Or it's really slated for deprecation?

  Serge.




From gradius at fmf.nl  Fri Apr 15 10:02:31 2005
From: gradius at fmf.nl (Anton Jansen)
Date: Fri, 15 Apr 2005 16:02:31 +0200
Subject: IOError 11 CGI module
Message-ID: <d3ogce$dbl$1@info.service.rug.nl>

Hi list,

I have troubles with some python scripts I use as cgi scripts with 
thttpd. At irregular intervals when a post is made an IOError is raised 
by the CGI module. My question is how and why does this happen?


The exception looks like this:

---
Traceback (most recent call last):
   File "teamadmin.cgi", line 11, in ?
     iudex_cgi.makeform()
   File "/wing6/home/jury/iudex/nederlands/lib/iudex_cgi.py", line 24, 
in makeform
     form = _extractflat( cgi.FieldStorage() )
   File "/usr/lib/python2.3/cgi.py", line 517, in __init__
     self.read_urlencoded()
   File "/usr/lib/python2.3/cgi.py", line 622, in read_urlencoded
     qs = self.fp.read(self.length)
IOError: [Errno 11] Resource temporarily unavailable
---

The code:

File:iudex_cgi.py
---

import sys
import time
import traceback
import cgi
import MySQLdb
from iudex_tags import *

form = None

def _extractflat( fields ):
   form = {}
   for i in fields.value:
     if not form.has_key( i.name ):
       form[i.name] = []
     if i.filename:
       form[i.name].append( ( i.filename, i.value ) )
     else:
       form[i.name].append( i.value )
   return form

def makeform():
   global form
   form = _extractflat( cgi.FieldStorage() )

---


With kind regards,

Anton Jansen


From m at m.com  Thu Apr 28 17:50:05 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 05:50:05 +0800
Subject: why "import wx" doesn't work?
References: <427126ca$1_3@rain.i-cable.com>
	<VDcce.981$PA3.377@newssvr31.news.prodigy.com>
Message-ID: <42715a8b$1_1@rain.i-cable.com>

> Which version of wxPython are you running? What do you mean by "does not
> work"...does the import fail or is your code giving errors?

It is the current new version 2.6. The error message said that the class
wxApp is not defined...
But when using the default "from wxPython.wx import *", it works.




From martin at v.loewis.de  Mon Apr 11 17:58:21 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 11 Apr 2005 23:58:21 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <20050411194907.1769.17472.XPN@orion.homeinvalid>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<20050411194907.1769.17472.XPN@orion.homeinvalid>
Message-ID: <425AF2FD.2080006@v.loewis.de>

Nemesis wrote:
> I have the same problem. But I have a doubt, does Python installer ship
> this dll? 

It sure does.

> What happens if I try to install Python2.4 on a system wich doesn't have
> the dll?

It will just work. Python installs the DLL if it is missing, and leaves
it alone (just incrementing the refcount) if it is present on the target
system.

Regards,
Martin



From steve at holdenweb.com  Thu Apr 21 07:29:14 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 07:29:14 -0400
Subject: deprecation of has_key?
In-Reply-To: <20050421121306.00006637@LAB2-13.esi>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>
	<20050421121306.00006637@LAB2-13.esi>
Message-ID: <42678E8A.4020808@holdenweb.com>

Luis Bruno wrote:
> Hello,
> 
> Steve Holden wrote:
> 
>>Two words: backward compatibility. To lose that method now would break 
>>thousands of existing programs. The 2.4 library would probably 
>>experience breakage too ... let's see:
>>
>>$ find /lib/python2.4/ -name "*.py" -exec grep has_key {} \; | wc -l
>>587
> 
> 
> Is there any interest in changing that to the "key in dict" sintax?
> 

The general principles on which maintenance is based for Python decree 
that such changes not be made gratuitously: the code as it is works now, 
so it is only worth changing when has_key is removed.

If a module were being edited for other reasons there would be no 
objection to removal of the has_key usage then, but the chance of 
breakage due to careless modification is high enough to want to avoid it 
unless really *necessary*.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/


From osv at javad.ru  Thu Apr 21 10:53:19 2005
From: osv at javad.ru (Sergei Organov)
Date: 21 Apr 2005 18:53:19 +0400
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
	<116fbo3pma1lsdb@corp.supernews.com>
Message-ID: <d48eov$ddn$2@n6.co.ru>

Grant Edwards <grante at visi.com> writes:

> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> 
> > Well, I'm writing for embedded realtime systems in C/C++ and
> > have never encountered a single need to use goto.
> 
> I have encountered situations in C programs where the best
> thing to use was a goto.  Those situations have always been
> handled beutifully by a "raise" in Python.

setjmp/longjump?

-- 
Sergei.


From bgs248 at hotmail.com  Fri Apr 29 22:40:56 2005
From: bgs248 at hotmail.com (bgs)
Date: 29 Apr 2005 19:40:56 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
References: <d4u60o$akh$1@news2.netvision.net.il>
Message-ID: <1114828856.889984.171750@g14g2000cwa.googlegroups.com>

pythonchallenge wrote:
> For the riddles' lovers among you, you are most invited to take part
> in the Python Challenge, the first python programming riddle on the
net.
>
> You are invited to take part in it at:
> http://www.pythonchallenge.com

That was fun.  The very first step in 6 was the most frustrating I
thought.



From mage at mage.hu  Tue Apr 19 09:07:08 2005
From: mage at mage.hu (Mage)
Date: Tue, 19 Apr 2005 15:07:08 +0200
Subject: modules and namespaces
Message-ID: <4265027C.2090104@mage.hu>

       Hello,

I thought that this will work:

#m1.py
def f1():
    return string.join('a','a')

#m2.py
def f2():
    return string.join('b','b')

#main.py
import string
import m1
import m2

print f1()
print f2()

---------

However it doesn't work until I import the string module into m1 and m2
modules. I found in the manual that imported modules will be searched in
the container module first. Is it more efficient to import the string
module into main and m1 and m2 than importing only into m1 and m2?

       Mage




From gry at ll.mit.edu  Fri Apr 29 16:54:36 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 29 Apr 2005 13:54:36 -0700
Subject: module exports a property instead of a class -- Evil?
In-Reply-To: <1114802337.216856.219870@l41g2000cwc.googlegroups.com>
References: <1114797779.371054.189950@g14g2000cwa.googlegroups.com>
	<1114802337.216856.219870@l41g2000cwc.googlegroups.com>
Message-ID: <1114808076.408181.130480@z14g2000cwz.googlegroups.com>

Hmm, I had no idea that "property" was a class.  It's listed in the
library
reference manual under builtin-functions.  That will certainly make
things neater.  Thanks!

-- George



From pgmoscatt at optushome.com.au  Fri Apr 15 05:29:09 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Fri, 15 Apr 2005 19:29:09 +1000
Subject: Tk Listbox - Selected Item ?
References: <pan.2005.04.14.12.05.18.839662@optushome.com.au>	<mailman.1892.1113484982.1799.python-list@python.org>
	<425f722b$0$5849$9a6e19ea@news.newshosting.com>
	<mailman.1953.1113555334.1799.python-list@python.org>
Message-ID: <425f8882$0$5861$9a6e19ea@news.newshosting.com>

Martin Franklin wrote:

> Peter Moscatt wrote:
>> Martin Franklin wrote:
>> 
>> 
>>>Peter Moscatt wrote:
>>>
>>>>I am having trouble understanding the methods for the Listbox from Tk.
>>>>
>>>>If I was to select at item in the list using a mouse click (have already
>>>>created the bind event) - what method returns the text of the selected
>>>>item ?
>>>>
>>>>Pete
>>>>
>>>
>>>
>>>Pete,
>>>
>>>pydoc Tkinter.Listbox
>>>
>>><snip>
>>>
>>>  |  curselection(self)
>>>  |      Return list of indices of currently selected item.
>>>  |
>>>  |  delete(self, first, last=None)
>>>  |      Delete items from FIRST to LAST (not included).
>>>  |
>>>  |  get(self, first, last=None)
>>>  |      Get list of items from FIRST to LAST (not included).
>>>
>>>So to get the value of the selected item:
>>>
>>>lb.get(lb.curselection()[0])
>>>
>>>
>>>provided the listbox is in single selection mode or only one item is
>>>selected
>>>
>>>Martin
>> 
>> 
>> Thanks Martin,
>> 
>> I used the:
>>   lb.get(lb.curselection()[0])
>> 
>> ant this works to a point.  When I select the item in the listbox the
>> system generates an error:
>> 
>> Exception in Tkinter callback
>> Traceback (most recent call last):
>>   File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1345, in __call__
>>     return self.func(*args)
>>   File "/home/linux/programming/dxcluster/servers.py", line 37, in sel
>>     items = self.listbox.get(self.listbox.curselection()[0])
>> IndexError: tuple index out of range
>> 
>> 
>> Then if I select a second time directly after the error message I get my
>> desired result.
>> 
> 
> Pete,
> 
> Sounds like you are using the wrong kind of bind event. That is the
> first time you select an item the callback for the bind command is
> called *before* the selection is made.  Can you post the code you have
> showing the bind method and callback?
> 
> This code shows three different bind methods, the first produces the
> same exception that you got...
> 
> 
> from Tkinter import *
> 
> 
> root = Tk()
> lb = Listbox(root)
> lb.insert(0, "one")
> lb.insert(0, "two")
> lb.insert(0, "three")
> lb.pack()
> 
> def callback(*event):
>      print lb.get(lb.curselection()[0])
> 
> ## BAD
> #~ lb.bind("<1>", callback)
> 
> ## OK
> #~ lb.bind("<ButtonRelease-1>", callback)
> 
> ## Best
> lb.bind("<<ListboxSelect>>", callback)
> 
> root.mainloop()
> 
> 
> The <<ListboxSelect>> is a virtual event I think quick google would tell
> you more and the Tk man pages (online) have a complete explanation...
> 
> http://www.tcl.tk/man/tcl8.4/TkCmd/listbox.htm
> http://www.tcl.tk/man/tcl8.4/TkCmd/listbox.htm#M60
> 
> 
> Cheers,
> Martin.

Thanks Martin,

You're a legend !!!!!

I fixed the bind and used lb.bind("<<ListboxSelect>>", callback) and away it
went.

Thanks heaps for the help.

Pete



From simon.brunning at gmail.com  Mon Apr  4 07:31:49 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 4 Apr 2005 12:31:49 +0100
Subject: Testing for EOF ?
In-Reply-To: <4251226a$0$5805$9a6e19ea@news.newshosting.com>
References: <4251226a$0$5805$9a6e19ea@news.newshosting.com>
Message-ID: <8c7f10c605040404315c1854de@mail.gmail.com>

On Apr 4, 2005 12:21 PM, Pete Moscatt <pgmoscatt at optushome.com.au> wrote:
> I am reasonably new to python and am trying to read several lines of text
> from an open file.

my_file = open('whatever.txt', 'r')
for line in my_file:
    print line # Or whatever

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From roy at panix.com  Thu Apr 21 22:17:25 2005
From: roy at panix.com (Roy Smith)
Date: Thu, 21 Apr 2005 22:17:25 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
	<3cr2caF6locm6U1@individual.net>
Message-ID: <roy-41B7B8.22172521042005@reader1.panix.com>

Greg Ewing <greg at cosc.canterbury.ac.nz> wrote:
> Also, everyone, please keep in mind that you always have
> the option of using a *dictionary*, in which case your
> indices can start wherever you want.
> 
> You can't slice them, true, but you can't have everything. :-)

Of course you can slice them, you just have to subclass dict!  The 
following was about 15 minutes work:

---------------
import types

class slicableDict (dict):
    def __getitem__ (self, index):
        if type (index) == types.SliceType:
            d2 = slicableDict()
            for key in self.keys():
                if key >= index.start and key < index.stop:
                    d2[key] = self[key]
            return d2
        else:
            return dict.__getitem__ (self, index)

d = slicableDict()
d['hen'] = 1
d['ducks'] = 2
d['geese'] = 3
d['oysters'] = 4
d['porpoises'] = 5

print d
print d['a':'m']
---------------

Roy-Smiths-Computer:play$ ./slice.py
{'oysters': 4, 'hen': 1, 'porpoises': 5, 'geese': 3, 'ducks': 2}
{'hen': 1, 'geese': 3, 'ducks': 2}

I defined d[x:y] as returning a new dictionary which contains those items 
from the original whose keys are in the range x <= key < y.  I'm not sure 
this is terribly useful but it's a neat demonstration of just how simple 
Python makes it to do stuff like this.  I can't imagine how much work it 
would be to add a similar functionality to something like C++ multimap.

I'm sure the code above could be improved, and I know I've ignored all 
sorts of things like steps, and error checking.  Frankly, I'm amazed this 
worked at all; I expected to get a syntax error when I tried to create a 
slice with non-numeric values.

PS: Extra credit if you can identify the set of keys I used without 
resorting to google :-)


From max2 at fisso.casa  Sat Apr  9 17:57:48 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 09 Apr 2005 21:57:48 GMT
Subject: serialize a tkinter thing
Message-ID: <wdY5e.1205486$35.44369741@news4.tin.it>

hi.

i tried to serialize a list of StringVar's, but i got a pickle error.

this got me to thinking that tkinter objects are not picklable (in general).

would somebody confirm and/or give examples?

thanks

macs


From chromeclouds at yahoo.co.uk  Tue Apr 12 18:28:01 2005
From: chromeclouds at yahoo.co.uk (Mark)
Date: 12 Apr 2005 15:28:01 -0700
Subject: Cannot import mod_python modules
References: <6c9897c2.0504120255.1f274@posting.google.com>
	<mailman.1752.1113311063.1799.python-list@python.org>
Message-ID: <6c9897c2.0504121428.4c7238a9@posting.google.com>

Thanks for the reply Steve,

I have re-installed mod_python and re-configured Apache and it works
now. I'm not exactly sure what I done differently, but oh well at
least it works now :)

Regards,

Mark.


From robin at alldunn.com  Sat Apr  9 00:03:30 2005
From: robin at alldunn.com (Robin Dunn)
Date: Fri, 08 Apr 2005 21:03:30 -0700
Subject: ANNOUNCE: wxPython 2.5.5.1
Message-ID: <42575412.1000502@alldunn.com>

Announcing
----------

I'm pleased to announce the 2.5.5.1 release of wxPython, now available
for download at http://wxpython.org/download.php.  This is mostly a
bug-fix release, but there are a few new features as well.  See the
changes list below for details.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK or GTK2, and Apple Macintosh OS
X.


Changes in 2.5.5.1
------------------

wxMSW: Fixed bug #1022383, 'several ComboBoxes appear selected'

wx.grid.Grid: Fixed bug #1163384.  Moved the code that handles
activating the cell editors to a EVT_CHAR event handler.  This is done
so the character inserted into the editor will be the "cooked" char
value (including accented or composed keys) rather than the raw code
provided by the EVT_KEY_DOWN event.

Added orient parameter to wx.MDIParentFrame.Tile()

wxMSW: wxTextCtrl with wx.TE_RICH2 style now uses RichEdit 4.1 if
available.

Added GetCount, GetCountRGB, and GetCountColour methods to
wx.ImageHistogram.

wxMSW: wx.Window.Refresh changed to explicitly refresh all children as
well as the parent.  Previously it was implicitly done because parents
did not clip their children by default.  Now that they always clip
children then Refresh needed to be fixed to do a recursive refresh.
This also fixes the Freeze/Thaw problems that some people had with
2.5.4.1.

wx.SplitterWindow: Send EVT_SPLITTER_SASH_POS_CHANGED only once after
end of dragging and not after each CHANGING event (modified patch
#1076226)

wx.glcanvas.GLCanvas: applied patch fixing problems with X server
crash when using nVidia cards (patch 1155132)

wx.lib.mixins.listctrl: Patches from Toni Brkic:
    * Bugfix for TextEditMixin when the view can't be scrolled
    * Enhancement for ListCtrlAutoWidthMixin, allowing it to manage
      the width of any column.

wxMac: removal and reusing toolbar tools like the other platforms is
now possible.

wxMac: Correct radio tool selection after calling Realize a 2nd time.

wxMSW: Applied patch #1166587, removes all flicker from wx.StaticBox

Added wx.lib.foldpanelbar, Andrea Gavana's port of Jorgen Bodde's C++
wxFoldPanelBar classes to Python.

wxGTK: Applied patch #1173802, reimplementation of GtkFileChooser
wxFileDialog by Mart Raudsepp.  Note that this new file dialog is only
used on GTK2 >= 2.4.  For earlier GTK2 versions and GTK1 then the
older generic file dialog is used.

wxMSW: fixes to static box borders calculations (finalizes patch
#1166587)

wx.Image: Use Python's buffer interface API for all image data and
alpha Set/Get methods and the ImageFromData* constructors.  They all
still copy the buffer except for SetDataBuffer and SetAlphaBuffer, but
this gives more flexibility on where the data can come from.

Added MDI support to XRC

Added wx.animate module and a demo.  The wx.animate module provides a
control that is able to display an animated GIF file.

wx.lib.plot.py: Applied patch from Werner F. Bruhin that allows either
vertical and/or horizontal gridlines.

wxMSW: Extra space given for top border of wx.StaticBoxSizer so the
upper line is not cliped when there is no label.

wxMSW: Restored old behaviour of wx.StaticBox.SetBackgroundColour only
affecting the label.

wxMSW: Fixed missing EVT_RIGHT_DOWN and EVT_TREE_ITEM_RIGHT_CLICK
events in a wx.TreeCtrl.

Added wx.GetTopLevelWindows() function which returns a copy of the
list of top-level windows that currently exist in the application.

Updated docview library modules and sample apps from the ActiveGrid
folks.

Added the ActiveGrid IDE as a sample application.

-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From codecraig at gmail.com  Mon Apr 18 17:04:33 2005
From: codecraig at gmail.com (codecraig)
Date: 18 Apr 2005 14:04:33 -0700
Subject: Tkinter & Tkconstants
In-Reply-To: <1113854966.648882.235040@l41g2000cwc.googlegroups.com>
References: <1113854966.648882.235040@l41g2000cwc.googlegroups.com>
Message-ID: <1113855590.105946.16330@l41g2000cwc.googlegroups.com>

nevermind, i should access it by

HORIZONTAL

not

Tkinter.HORIZONTAL

since I imported everything from Tkinter already.  Thanks anyway



From brad at it.alliedpress.co.nz  Mon Apr 25 19:50:07 2005
From: brad at it.alliedpress.co.nz (Brad Murdoch)
Date: Tue, 26 Apr 2005 11:50:07 +1200
Subject: select() on pipe
Message-ID: <426D822F.7010402@mailhost>

im trying to run the select.selct() on a unix pipe, my expectation is 
that it will block untill there is something there to read, then 
continue. It seems to do this untill the pipe is written to once, then i 
get a busy while loop.
shouldnt this stop each time, to wait  for something to be written to 
the pipe. obviously im a novice when it comes to python programming, 
what am i missing here.

cheers..

#!/usr/bin/python

import os
import sys
import select

try:
 fifo = open('test.fifo','r')
except Exception, blah:
 report = "ERROR 001: " + str(blah)
 print report
 sys.exit(2)

while 1:
 line = False
 r,w,x = select.select([fifo],[],[])
 if r:
    line=fifo.read()
    print line



From simon.brunning at gmail.com  Mon Apr  4 07:48:00 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 4 Apr 2005 12:48:00 +0100
Subject: Testing for EOF ?
In-Reply-To: <1112614568.5293.4.camel@localhost>
References: <4251226a$0$5805$9a6e19ea@news.newshosting.com>
	<8c7f10c605040404315c1854de@mail.gmail.com>
	<1112614568.5293.4.camel@localhost>
Message-ID: <8c7f10c605040404484d8a837b@mail.gmail.com>

On Apr 4, 2005 12:36 PM, Peter Moscatt <pgmoscatt at optushome.com.au> wrote:
> Thanks Simon,
> 
> So the code should look like:
> 
> f=open(myfile,"r")
> 
> for some_var in f:
>   text=f.readline()
>   print text
> 
> Do I have this correct ?

Nearly - you don't need the text=f.readline() bit. A file object (as
returned to you by open()) is an iterator, and iterating over it gives
you the lines directly.

Why not give it a go? The nice thing about Python is how easy it is to
try stuff like this out at the interactive prompt. Err, *one* of the
nice things, that is. ;-)

BTW, newbies are more than welcome here, but there is a python-tutor
list[1] which might be more your speed if you are quite new to Python.
There are also a number of tutorials available[2] . I'd recommend
either the standard tutorial[3] or Dive Into Python[4] for someone
like you who already knows how to program but doesn't know Python.

Welcome to Python, and have fun.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/
[1] http://mail.python.org/mailman/listinfo/tutor
[2] http://www.python.org/moin/BeginnersGuide/Programmers
[3] http://www.python.org/doc/current/tut/
[4] http://diveintopython.org/


From could.net at gmail.com  Tue Apr  5 03:33:29 2005
From: could.net at gmail.com (could ildg)
Date: Tue, 5 Apr 2005 15:33:29 +0800
Subject: How to merge two binary files into one?
In-Reply-To: <pan.2005.04.05.05.58.12.668596@dalkescientific.com>
References: <mailman.1340.1112663541.1799.python-list@python.org>
	<1153pu8pvom6b02@corp.supernews.com>
	<mailman.1344.1112666821.1799.python-list@python.org>
	<1153vfhid1vfif1@corp.supernews.com>
	<pan.2005.04.05.05.58.12.668596@dalkescientific.com>
Message-ID: <311b5ce1050405003353935bd@mail.gmail.com>

I'm so glad that this this problem has so many recipes.

On Apr 5, 2005 1:57 PM, Andrew Dalke <dalke at dalkescientific.com> wrote:
> Grant Edwards wrote:
> > For large files, something like this is probably a better idea:
> 
> Or with the little-used shutil module, and keeping your
> nomenclature and block size of 65536
> 
> import shutil
> fout = file('C', 'wb')
> for n in ['A', 'B']:
>   fin = file(n, 'rb')
>   shutil.copyfileobj(fin, fout, 65536)
>   fin.close()
> fout.close()
> 
>                                 Andrew
>                                 dalke at dalkescientific.com
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


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


From Scott.Daniels at Acm.Org  Sat Apr  2 13:28:04 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 02 Apr 2005 10:28:04 -0800
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
In-Reply-To: <1112456559.835048@yasure>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net> <1112456559.835048@yasure>
Message-ID: <424edf02@nntp0.pdx.net>

Donn Cave wrote:
> Quoth Scott David Daniels <Scott.Daniels at Acm.Org>:
> | Sunnan wrote:
> | > ...Because what is "boring"? The opposite of dense, tense, intense. Utterly 
> | > predictable; it's like the combination of all my prejudices. Even before 
> | > I knew, I thought "Bet Python separates statements from expressions".
> |
> | Python is for terse, pithy prose; Python is not for poetry.
> 
> That's an odd thing to say.  Poetry is verbose, florid?

No, poetry is to be read slowly and carefully, appreciating the nuance
at every point.  You should be able to read "past" python, while poetry
is at least as much about the form of the expression as it is about
what is being expressed.

> Python is Dutch.
> 
> 	Donn


From claird at lairds.us  Wed Apr 20 14:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 20 Apr 2005 18:08:03 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<mailman.2163.1113997893.1799.python-list@python.org>
Message-ID: <okgij2-98r.ln1@lairds.us>

In article <mailman.2163.1113997893.1799.python-list at python.org>,
Maxim Kasimov  <kasimov at i.com.ua> wrote:
>Simon Brunning wrote:
>> On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
>> 
>>>it would be quite useful for debuging porposes
>> 
>> 
>> How does goto help you to remove bugs?
>> 
>> I can certainly see how it helps you put them in in the first place...
>> 
>
>if you need to comment a couple of code (and then uncomment ), what are
>you doing then?
			.
			.
			.
I might understand the question.  I often have

    if 0:
            # This is code we never should need; I
	    # leave it here for expository purposes.
        print some_key_debugging_information()

Does that help?


From beliavsky at aol.com  Fri Apr 22 11:12:56 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 22 Apr 2005 08:12:56 -0700
Subject: In defense of Visual Basic (was Re: Why Python does *SLICING* the
	way it does??)
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<d48cu8$1a9$1@news.doit.wisc.edu>
	<HOadnbQkd5fxmvTfRVn-og@powergate.ca>
Message-ID: <1114182776.534932.264940@f14g2000cwb.googlegroups.com>

Peter Hansen wrote:

<snip>

> > But I agree, having "the easiest thing for newbies" as your sole
> > criterion for language design is a road to madness, for no other
reason
> > than that newbies don't stay newbies forever.
>
> If Visual BASIC is the example of "easiest thing for newbies",
> then it disproves your theory already.  I think VB newbies
> *do* stay newbies forever (or as long as they are using just VB).

Much snobbery is directed at Visual Basic and other dialects of Basic
(they even have "basic" in their name), but I think VBA is better
designed than the prestigious C in some important ways.

Suppose you want to allocate a 2-D array at run-time and pass it to a
procedure. The VBA code is just

Option Explicit
Option Base 1

Sub make_matrix()
Dim x() As Double
Dim n1 As Integer, n2 As Integer
n1 = 2
n2 = 3
ReDim x(n1, n2)
Call print_matrix(x)
End Sub

Sub print_matrix(xmat() As Double)
Debug.Print UBound(xmat, 1), UBound(xmat, 2)
'do stuff with xmat
End Sub

It is trivial to allocate and pass multidimensional arrays in VBA, but
C requires expertise with pointers. The subroutine print_matrix can
query the dimensions of xmat, so they don't need to be passed as
separate arguments, as in C. The fact that is tricky to do simple
things is a sign of the poor design of C and similar languages, at
least for non-systems programming.

People bash VB as a language the corrupts a programmer and prevents him
from ever becoming a "real" programmer. Maybe VB programmers quickly
get so productive with it that they don't need to fuss with trickier
languages.



From mage at mage.hu  Wed Apr 20 08:33:56 2005
From: mage at mage.hu (Mage)
Date: Wed, 20 Apr 2005 14:33:56 +0200
Subject: exception handling
Message-ID: <42664C34.9090802@mage.hu>

       Hello,


def error_msg(msg):
    sys.exit(msg)

try:
    do_something()
    if value != my_wish:
       error_msg('Invalid input')
except:
    print "Fatal IO or Network error"

This doesn't work because sys.exit raises an exception.

I know that I can define exception types after except, but there might
be many. Also I know I can write:
except:
    if str(sys.exc_info()[0]) == 'exceptions.SystemExit':
        raise

But honestly I would like simething like that:

except (!SystemExit):

Is this possible somehow?

       Mage


From domma at procoders.net  Thu Apr 14 14:49:01 2005
From: domma at procoders.net (Achim Domma (Procoders))
Date: Thu, 14 Apr 2005 20:49:01 +0200
Subject: Socket Error
In-Reply-To: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
References: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
Message-ID: <d3mduk$k9b$03$1@news.t-online.com>

kingofearth.com at gmail.com wrote:

> NameError: name 'socket' is not defined

You forgot to import the socket module:

import socket

regards,
Achim


From steven.bethard at gmail.com  Wed Apr 13 11:26:53 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 09:26:53 -0600
Subject: Is socket.shutdown(1) useless
In-Reply-To: <1113397224.402755.286570@o13g2000cwo.googlegroups.com>
References: <1113397224.402755.286570@o13g2000cwo.googlegroups.com>
Message-ID: <1aGdnT6IAY6mp8DfRVn-rQ@comcast.com>

pyguy2 at gmail.com wrote:
> In my python books I find exclusive use of socket.close(). From my
> other readings, I know about a "partial close operation". So, I figured
> it would be useful to post some code about how socket.close() has an
> implicit send in it and you can actually gain some clarity by being
> more explicit with the partial close which means  splitting
> socket.close() up into socket.shutdown(1) and socket.close().
> 
> And got a response in essence saying, why bother, socket.shutdown,
> isn't useful.

I had to use socket.shutdown once because the socket architecture we had 
relied on sending a piece of data, waiting for it to be processed, and 
then receiving a result back.  The server on the other end of the socket 
wouldn't process anything until it was sure that all data had been sent. 
  So our code basically looked like:

s = socket.socket(...)
s.connect(...)
s.send(...)
s.shutdown(1)
data = s.makefile().read()
s.close()

STeVe


From steven.bethard at gmail.com  Wed Apr 13 11:08:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 09:08:08 -0600
Subject: os.path.walk
In-Reply-To: <hu6dnY4pjIlbisDfRVn-1g@powergate.ca>
References: <425c9902$1@dnews.tpgi.com.au>
	<hu6dnY4pjIlbisDfRVn-1g@powergate.ca>
Message-ID: <GpSdndakpZxIqMDfRVn-hw@comcast.com>

Peter Hansen wrote:
> Micheal wrote:
> 
>> If I have os.path.walk(name, processDirectory, None) and processDirectory
>> needs three arguments how can I ass them because walk only takes 3?
> 
> The best answer to this is: if you aren't stuck
> using a version of Python prior to 2.4, don't
> use os.path.walk but use os.walk() instead...

I believe os.walk was introduced in 2.3 (according to the docs[1]), so 
unless you're using a really old Python, you should be able to use it.

I also agree that os.walk is *much* simpler.

STeVe

[1] http://docs.python.org/lib/os-file-dir.html#l2h-1628


From rschroev_nospam_ml at fastmail.fm  Thu Apr 14 10:52:08 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Thu, 14 Apr 2005 14:52:08 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <d3ekhf$a0f$1@lairds.us>
References: <d3ekhf$a0f$1@lairds.us>
Message-ID: <ssv7e.64636$tE2.4675635@phobos.telenet-ops.be>

Simon Brunning wrote:

> ...

Not that it really matters, but does anybody know why the weekly Python
news always arrives twice? Does it only happen to me, or does it happen
to others too?

It's not that it irritates me or anything, I'm just being curious.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From radam2 at tampabay.rr.com  Sun Apr  3 09:53:42 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 13:53:42 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424F8F0E.2010701@v.loewis.de>
Message-ID: <ngrv41t91416l04kt8g9d15v3r45psdfhd@4ax.com>

On Sun, 03 Apr 2005 08:37:02 +0200, "Martin v. L?wis"
<martin at v.loewis.de> wrote:

>Ron_Adam wrote:
>>>Ah, so you did not know functions are objects just like numbers,
>>>strings or dictionaries. I think you may have been influenced by other
>>>languages where there is a concept of static declaration of functions.
>> 
>> 
>> No, I did not know that you could pass multiple sets of arguments to
>> nested defined functions in that manner.  
>
>Please read the statements carefully, and try to understand the mental
>model behind them. He did not say that you can pass around multiple
>sets of arguments. He said that functions (not function calls, but
>the functions themselves) are objects just like numbers. There is
>a way of "truly" understanding this notion, and I would encourage
>you to try doing so.

Hello Martin,

It is interesting how sometimes what we already know, and a new
situation presented in an indirect way, can lead us to viewing an
isolated situation in a biased way.

That's pretty much the situation I've experienced here with this one
point. I already knew that functions are objects, and objects can be
passed around.  My mind just wasn't clicking on this particular set of
conditions for some reason, probably because I was looking too closely
at the problem. 

(Starting off as a tech, with knowledge of how microchips work, can
sometimes be a obstacle when programming in high level languages.)

I'm sure I'm not the only one who's had difficulties with this.  But
I'm somewhat disappointed in myself for not grasping the concept as it
is, in this particular context, a bit sooner.     

Cheers,
Ron


>Regards,
>Martin



From ivanlan at pauahtun.org  Mon Apr 25 13:32:24 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Mon, 25 Apr 2005 11:32:24 -0600
Subject: Multiple tuples for one for statement
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>	<200504251356.07715.james@wrong.nu>	<426CF1D5.E9F4396@pauahtun.org>	<200504251457.28724.james@wrong.nu>	<mailman.2456.1114437838.1799.python-list@python.org>	<JoCdna5WP9b3Z_HfRVn-vA@powergate.ca>
	<mailman.2473.1114446257.1799.python-list@python.org>
	<uNKdnSHQLpLEgvDfRVn-pQ@powergate.ca>
Message-ID: <426D29A8.38E7DB90@pauahtun.org>



Peter Hansen wrote:
> 
> Ivan Van Laningham wrote:
> > I can see that now.  I had three hours sleep last night and my brain
> > hurts, so I don't get it.  I seek enlightenment.
> 
> So do I: did you mean you don't even "get" what
> my code is doing...?

Yes.  I barely remember my own name right now.

> 
> (My sample works only because I created tuples that
> had exactly three items each, of course.  It's the
> same as your previous code which didn't work, except
> for the number of elements in each tuple.  I wrote
> it just to show that R.C.James's idea was a reasonable,
> if probably mistaken, interpretation of the OP's request.)
> 

I worked out that the a,b,c must match the length of the tuples.  The
fog past that point is too dense.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From benji at benjiyork.com  Fri Apr 15 19:47:53 2005
From: benji at benjiyork.com (Benji York)
Date: Fri, 15 Apr 2005 19:47:53 -0400
Subject: Python Google Server
In-Reply-To: <1112717390.981837.39400@l41g2000cwc.googlegroups.com>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>	<7x7jjhw7ro.fsf@ruckus.brouhaha.com>
	<1112717390.981837.39400@l41g2000cwc.googlegroups.com>
Message-ID: <426052A9.5040201@benjiyork.com>

Fuzzyman wrote:
> The trouble is the current policy is 'whitelist only'... so I need the
> proxy installed on a server that is *on the whitelist*... which will
> take a little time to arrange.

If you construct a noop translation (English to English for example) 
Google becomes a (HTML only) proxy.  Here's an example:

http://google.com/translate_c?langpair=en%7Cen&u=http://python.org/
--
Benji York


From finite.automaton at gmail.com  Fri Apr 29 18:04:09 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 29 Apr 2005 15:04:09 -0700
Subject: Sorting an Edge List
References: <fLqdne0t4Y81OO_fRVn-qw@comcast.com>
Message-ID: <1114812249.753317.192080@f14g2000cwb.googlegroups.com>

Sort demands a unique ordering, which isn't present in your case.
You're constructing an Eulerian path.  See Fleury's algorithm:

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



From fredrik at pythonware.com  Fri Apr 15 16:21:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 15 Apr 2005 22:21:11 +0200
Subject: Python 2.4.1 hang
References: <1113595275.615168.189790@o13g2000cwo.googlegroups.com>
Message-ID: <d3p7fp$4qk$1@sea.gmane.org>

Mahesh wrote:

> I needed to get to the POST body and while I was trying out various
> regular expressions, one of them caused Python to hang. The Python
> process was taking up 100% of the CPU. I couldn't even see the "Max
> recursion depth exceeded message". Is this a bug?

no, it's just a very stupid way to implement a trivial operation.
 
> import re
> 
> s = \
> """POST /TradeManagement-RT3/ReportController.Servlet HTTP/1.1
> /snip>
> 
> #pattern_str = "^POST.*\\r\\n\\r((\\n)|(\\n[^\r]*))"
> #pattern_str = "^POST.*\\n((\\n)|(\\n[^\r]*&))"
> pattern_str = "^POST(.*\\n*)+\\n\\n" # <--- Offending pattern

the first .* is a variable-length match.  so is the second .*.  and then you're putting it
inside a repeated capturing group.  and then you're applying it to a moderately large
string.  the poor engine has to check zillions of combinations before finding something
that works.

if you want to split on "\r\n\r\n", use split:

    header, body = message.split("\r\n\r\n")

for more robust code, consider using the rfc822 module:

    f = StringIO.String(message)
    request = f.readline() 
    header = rfc822.Message(f)
    body = f.read()

</F>



From gtg856h at mail.gatech.edu  Wed Apr 27 23:46:34 2005
From: gtg856h at mail.gatech.edu (Brian Kazian)
Date: Wed, 27 Apr 2005 23:46:34 -0400
Subject: TKinter and Python Sync. Problems
Message-ID: <d4pmai$1e9$1@news-int2.gatech.edu>

I am currently having trouble running a piece of code I have written.  My 
main code is called new.py, and when I run it, it pops up the TKinter root 
window as specified.  However, if I try perform a function that uses an 
imported module, the code crashes, giving me this error:


Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python24\lib\lib-tk\Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "C:\jython\new.py", line 38, in save_var
    var = expression.Variable(name, description)
AttributeError: 'module' object has no attribute 'Variable'

Now, when I close the TKinter window that popped up when the code was 
compiled, an identical one is opened in its place.  If I perform the same 
action as before, the program works flawlessly.  Also worth noting is that 
when this same file is run from SPE, this problem does not ocur.

Does anyone have any idea why this would happen?   I do not understand why a 
new Window is created when I try to close it if run from the command line. 
Also, I don't understand why it can't find the proper module the on the 
first run, but can on the second.  It seems weird that it doesn't also 
happen from the IDE.

Another interesting thing to note is that if I run the module that it chokes 
on intially, ie. 'python expr.py', it brings up the GUI associated with the 
main code.  The problem is, there is no TKinter related code in the expr 
module!

If any additional info or clarification would be helpful, please let me 
know.  Thanks in advance for the help, as I am truly perplexed as to what is 
going on!! 




From carsten at uniqsys.com  Tue Apr 12 10:30:23 2005
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 12 Apr 2005 10:30:23 -0400
Subject: Informixdb: New maintainer, new version
Message-ID: <1113316222.16002.51.camel@dot.uniqsys.com>

Hi Everybody:

Since the current maintainer of the informixdb module appears to have
gone missing, I have decided to take over the project. The new home of
the informixdb module is http://sourceforge.net/projects/informixdb .

Version 1.4 features the following improvements:

* Build uses distutils instead of deprecated Makefile.pre.in mechanism.
* Connect method takes optional username and password parameters for
connecting to a remote database.
* Cursor attribute .sqlerrd exposes Informix's sqlca.sqlerrd resulting
from the cursor's most recent .execute() call.

If you have any questions or comments, please let me know.

Best regards,

-- 
  Carsten Haese - Software Engineer   |    Phone:  (419) 861-3331
        Unique Systems, Inc.          |      FAX:  (419) 861-3340
     1446 Reynolds Rd, Suite 313      |
         Maumee, OH  43537            |  mailto:carsten at uniqsys.com



From nav+posts at bandersnatch.org  Wed Apr 20 11:57:44 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 20 Apr 2005 11:57:44 -0400
Subject: How to Convert a makefile to Python Script
References: <1113968971.081613.140640@l41g2000cwc.googlegroups.com>
Message-ID: <87ll7d5tl3.fsf@localhost.localdomain>

rkoida at yahoo.com writes:

>    I am working on a Problem to convert makefile in to a python script.
> Are there any Modules? Please try to comment.

How about this (untested):

-------- cut here --------
import subprocess

print ("import os")
make = subprocess.Popen(["make", "-n"],stdout=subprocess.PIPE)
makeout = make.communicate()[0]
for l in makeout.split('\n'):
    print 'os.system("%s")' % l.replace('"', '\"')
-------- cut here --------

The quote escaping replace() might not be quite right, but you get
what I'm suggesting, right? To mangle a lwall quote, "The only
substitute for make is make."

Nick

-- 
# sigmask  (lambda deprecation version) 20041028 || feed this to a python
print ''.join([chr(ord(x)-1) for x in 'Ojdl!Wbshjti!=ojdlAwbshjti/psh?'])


From ali.jan at gmail.com  Tue Apr 19 08:06:13 2005
From: ali.jan at gmail.com (Ali)
Date: 19 Apr 2005 05:06:13 -0700
Subject: MessageBox ONOK?
Message-ID: <1113912372.980136.9870@g14g2000cwa.googlegroups.com>

Hi,

How do i connect the onOK of a win32ui MessageBox with the Ok button so
that I get to know when the user clicks the Ok button?

Regards,
Ali



From lee at example.com  Thu Apr 28 16:18:27 2005
From: lee at example.com (Lee Harr)
Date: Thu, 28 Apr 2005 20:18:27 GMT
Subject: interactive web graphics
References: <mailman.2600.1114635374.1799.python-list@python.org>
Message-ID: <nybce.65$Ww7.18@news02.roc.ny>

On 2005-04-27, Eckhoff, Michael A <EckhoffM at NAVO.NAVY.MIL> wrote:
> Hello,
>
> I failed to locate a list for pygtk, so I thought I'd
> ask my question here. Is it possible to write CGI
> scripts that bring up a GUI (as in GTK+, QT, Tk, ...)
> or an openGL display that is windowed inside a web
> browser?
>

How about the blender web plugin?
http://www.blender.org/modules/bc2002/plugin.html

I am not sure the plugin has been updated to match
recent blender releases, but recent blenders offer
python scripting. Could be interesting anyhow.


From bokr at oz.net  Wed Apr 13 16:45:30 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 13 Apr 2005 20:45:30 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be><mailman.1751.1113310691.1799.python-list@python.org><slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be><mailman.1793.1113334936.1799.python-list@python.org><slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be><mailman.1818.1113375260.1799.python-list@python.org><slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be><mailman.1823.1113383437.1799.python-list@python.org>
	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1852.1113413601.1799.python-list@python.org>
Message-ID: <425d6ebd.300805455@news.oz.net>

On Wed, 13 Apr 2005 13:30:18 -0400, "Terry Reedy" <tjreedy at udel.edu> wrote:

>
>"Antoon Pardon" <apardon at forel.vub.ac.be> wrote in message 
>news:slrnd5pqfh.lf2.apardon at rcpc42.vub.ac.be...
>> I see this as my contribution to the communities who has provided me
>> with all kinds of things that are usefull to me. I'm willing to put
>> time into this,
>
>Great.  My human, non-lawyer advice, if I were to give it, would be to 
>worry less and remember that PSF exists to promote Python, not to sue 
>Python promoters.
>
>>From what I understand from what you have written, you have written code 
>for a tutorial based on one module of the library.  I personally would 
>treat this minor extraction differently from a 'derived' work consisting of 
>an alternate interpreter + library, such as from ActiveState, or Enthought, 
>or Jython, or Iron-Python.  I think I would simply put lines in the header 
>something like:
>"Derived from module heapify in the library included with CPython 2.x, (C) 
><include PSA's copyright notice>, available from www.python.org/wherever.
>
As with code, perhaps authoritative and well-done examples for different
situations would be the easiest to take patterns from.

If there were a collection of URLs to various such software and their license
notices in the wiki, perhaps that would help well motivated people like Antoon.

If it is important to get right, maybe the PSF should hire a lawyer to work up
some paradigmatic examples and put them in the wiki?

BTW, I dislike large legal boilerplate (that IIRC I've even seen occupying more
lines than the code it was describing in a few cases).

Is a simple one-line notice referring to the full license text somewhere legally sufficient?
How do you make the reference unambiguous? Md5 or SHA hash?

Regards,
Bengt Richter


From aleksander.helgaker at gmail.com  Wed Apr 20 08:18:17 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 20 Apr 2005 05:18:17 -0700
Subject: building a small calculator
Message-ID: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>

I'm learning to program python on my Mac and I'd like some help. I
followed a tutorial which showed how to make a calculator for working
out the area of a shape. E.g. the area of a circal is pi*r*r.

To practice a bit I thought I'd make the program more advanced but I'm
already having difficoulties. Here is what I have so far.

<code>
# Area calculation program
print "Welcome to the Area calculation program"
print "---------------------------------------"
print

# Print out the menu:
print "Please select a shape:"
print "1 Rectangle"
print "2 Circle"
print "3 Square"

# Get the user's choice:
shape = input("> ")

# Calculate the area:
if shape == 1:
	height = input("Please enter the height: ")
	width = input("Please enter the width: ")
	area = height*width
	print "The area is", area
elif shape == 2:
	radius = input("Please enter the radius: ")
	area = 3.14*(radius**2)
	print "The area is", area
else:
	length = input("Please input the length: ")
	area = length**2
	print "The area is", area
</code>

Now once the user has select a shape and typed in the lengths required,
the result is printed and the program quits. What I want to do is make
the program display the result and then make it wait for the user to
press return (or something like that) after which the screen will be
cleared and they'll be back at the main menu.

Also I would like to add option nr 4 to the menu and make that the quit
command, but what command does python have to stop a program? I tried
end but that did not work.



From cam.ac.uk at mh391.invalid  Fri Apr 29 18:21:43 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 29 Apr 2005 23:21:43 +0100
Subject: Best way to parse file into db-type layout?
In-Reply-To: <7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
Message-ID: <d4uc1r$nfs$1@gemini.csx.cam.ac.uk>

John Machin wrote:
> [Michael Hoffman]:
> 
>>for row in csv.reader(fileinput.input()):
> 
> csv.reader requires that if the first arg is a file that it be opened
> in binary mode.

fileinput.input() is not a file.

I have tested this code and it works fine for the provided example.
-- 
Michael Hoffman


From pgmoscatt at optushome.com.au  Wed Apr 13 04:53:01 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Wed, 13 Apr 2005 18:53:01 +1000
Subject: A command in a String ?
References: <pan.2005.04.13.08.25.53.59804@optushome.com.au>
	<mailman.1820.1113381375.1799.python-list@python.org>
Message-ID: <pan.2005.04.13.08.52.50.894039@optushome.com.au>

</F>,

Thanks for the help on this.  Yea the 'exec' did the trick.
The second example just placed all the strings in one option button.

Pete



On Wed, 13 Apr 2005 10:34:20 +0200, Fredrik Lundh wrote:

> Peter Moscatt wrote:
> 
>>I have a rather odd question:
>>
>> Is there a way Python can execute a command within a string ?
>>
>> For example if I had something like:
>> _str = "fm=OptionMenu(root,xx,'string1','string2','string3')"
>>
>> And the execute _str.
> 
> exec _str
> 
>> The reason why I am trying to do this that as I am aware the OptionMenu
>> hasn't the ability insert options therefore the options would be inserted
>> by manipulating strings.
> 
> does this do what you want?
> 
>     strings = "string1", "string2", "string3"
>     fm = OptionMenu(root, xx, *strings)
> 
> </F>



From michele.simionato at gmail.com  Thu Apr 28 01:20:13 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 27 Apr 2005 22:20:13 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1114663336.926935.97910@f14g2000cwb.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
	<1114587592.260950.181990@l41g2000cwc.googlegroups.com>
	<1114587846.011299.125420@g14g2000cwa.googlegroups.com>
	<1114663336.926935.97910@f14g2000cwb.googlegroups.com>
Message-ID: <1114665613.879362.75100@l41g2000cwc.googlegroups.com>

Mir Nazim:
> Can you please brief me a bit about your decision to CherryPy

Decision? I made no decision about CherryPy, I am actually a Quixote
user. I evalued CherryPy six months ago and I did not like it, since
they were using custom classes and a strange compilation procedure.

However, from the presentation I saw at the ACCU conference, it looks
like now CherryPy is much more pythonic than before (use the definition
you like for pythonic). If I was shopping for a web framework today, I
would
certainly consider CherryPy.

CherryPy and Quixote are in the same league, Zope and Twisted and PEAK
are in an enterely different league. They are meant for programming in
the large
and do not scale well for small size applications. CherryPy and Quixote
are for
programming in the small, I have not idea how they scale in the large.
Is your application going to be large (many developers, hundred of
components, hundreds of thousand of lines of code) or small?

                   Michele Simionato



From philippe at philippecmartin.com  Thu Apr 28 14:01:16 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Thu, 28 Apr 2005 18:01:16 GMT
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114625172.700855.263140@l41g2000cwc.googlegroups.com>
Message-ID: <Mx9ce.1822$gd5.160@newssvr12.news.prodigy.com>

How about using the csv module instead of splitting ?


wittempj at hotmail.com wrote:

> What you want I guess is to read first all lines of the file into a
> string as you did, and then let the split method split it based on
> newlines only - see example below.
> 
> Then you use split again to put all elements of one line into another
> list - split it on commas.
> 
> Now you can define sortfunctions for all columns you want to sort, e.g.
> like below - and use those to compare elements. You get a script like:
> -#!/usr/bin/env python
> -
> -def cmp_index(a, b, ndx):
> -   if a[ndx] < b[ndx]:
> -        return -1
> -    elif a[ndx] > b[ndx]:
> -       return 1
> -    else:
> -        return 0
> -
> -def cmp_0(a, b):
> -    return cmp_index(a, b, 0)
> -
> -def cmp_1(a, b):
> -    return cmp_index(a, b, 1)
> -
> -s = 'Kikker en Eend,Max Veldhuis\nDikkie Dik,Jet Boeke\nRuminations on
> C++,Andrew Koenig & Barbara Moo'
> -s = s.split('\n')
> -l = []
> -for i in s:
> -    l.append(i.split(','))
> -
> -l.sort(cmp_0)
> -print l
> -l.sort(cmp_1)
> -print l
> 
> with output like:
> martin at ubuntu:~ $ ./test.py
> [['Dikkie Dik', 'Jet Boeke'], ['Kikker en Eend', 'Max Veldhuis'],
> ['Ruminations on C++', 'Andrew Koenig & Barbara Moo']]
> [['Ruminations on C++', 'Andrew Koenig & Barbara Moo'], ['Dikkie Dik',
> 'Jet Boeke'], ['Kikker en Eend', 'Max Veldhuis']]
> martin at ubuntu:~ $



From duncan.booth at invalid.invalid  Fri Apr  1 03:20:33 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 1 Apr 2005 08:20:33 GMT
Subject: string goes away
References: <mailman.1156.1112322721.1799.python-list@python.org>
Message-ID: <Xns962B5D9DAB99Eduncanrcpcouk@127.0.0.1>

Andreas Beyer wrote:

> I loved to use
> >>> string.join(list_of_str, sep)
> instead of
> >>> sep.join(list_of_str)
> 
> I think the former is much more telling what is happening than the 
> latter. However, I will get used to it.

No need to get used to it. Just reverse the order of the arguments and use:

   str.join(sep, list_of_str)

Alternatively it can be clearer if you bind a name to the bound method:

   joinLines = '\n'.join
   joinWords = ' '.join

   lines = joinLines(somelines)
   words = joinWords(somewords)


From RonGrossi_38_2513 at yahoo.com  Wed Apr 13 14:27:37 2005
From: RonGrossi_38_2513 at yahoo.com (RonGrossi_38_2513 at yahoo.com)
Date: 13 Apr 2005 11:27:37 -0700
Subject: =?iso-8859-1?q?THE_GREATEST_NEWS_EVER!_=B0=BA=B7=2E=5F=2E=5F=2E?=
	=?iso-8859-1?q?=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E?=
	=?iso-8859-1?q?=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7?=
	=?iso-8859-1?q?=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F?=
	=?iso-8859-1?q?=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F?=
	=?iso-8859-1?q?=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=5F=2E=5F=2E=B7_=28newsgroup-post_134=29?=
Message-ID: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>

The Greatest News Ever!
http://groups-beta.google.com/group/alt.politics.bush/browse_thread/thread/f9b35b05a72da1e1/66f1a43881a0fe82#66f1a43881a0fe82

?._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.??._._.???`???._._.???`???._._.???`???._._.???`???._._.???`???._._.?

__________________________________________


The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrongdoing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.



Servant of the Lord Jesus Christ,
Internet Evangelist
Ronald L. Grossi


____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.browser.to/jesus-animation

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.bibledatabase.net



From gandalf at geochemsource.com  Thu Apr  7 06:34:33 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 12:34:33 +0200
Subject: import statement - package visibility problem
Message-ID: <42550CB9.8060309@geochemsource.com>


  Hi All!

I have the following structure:


/Lib/Server/Db/
    __init_.py
    DatabaseConnection.py
    Adapters/
       __init__.py
       FireBirdConnection.py

Important file contents are:

/Lib/Server/Db/__init__.py:

    import DatabaseConnection
    import Adapters

/Lib/Server/Db/DatabaseConnection.py:

    class DatabaseConnection(object):
          pass


/Lib/Server/Db/Adapters/__init__.py

    import FireBirdConnection

/Lib/Server/Db/Adapters/FireBirdConnection.py:

    from DatabaseConnection import DatabaseConnection
    class FireBirdConnection(DatabaseConnection):
           pass

Here is the problem. I go to the directory where 'Lib' resides. Then I do:

C:\Temp\ccc>python
Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import Lib
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "Lib\__init__.py", line 1, in ?
    import Server
  File "Lib\Server\__init__.py", line 1, in ?
    import Db
  File "C:\Python\Lib\Db\__init__.py", line 29, in ?
    import      Adapters
  File "C:\Python\Lib\Db\Adapters\__init__.py", line 21, in ?
    import FireBirdConnection
  File "Db\Adapters\FireBirdConnection.py", line 27, in ?
ImportError: No module named DatabaseConnection
 >>>

My problem is that Lib/Server/Db/Adapters/FireBirdConnection.py does not 
see Lib/Server/Db/DatabaseConnection.py.
Of course I read the documentation about the import statement but I do 
not see a good solution.

Possible solutions and their drawbacks:

Solution 1:

Put the 'Db' directory into my PYTHONPATH or append it to "sys.path". It 
is too bad. This could make my 'Db' module
visible but this is not a good solution. For example, I can have this 
module structure:

Lib/
    Client/
       Db/
          Adapters/
    Server/
       Db/
          Adapters/

E.g. there could be two "Db" modules, one for Client and one for Server. 
Clearly, I cannot add EVERY module path to sys.path. It would be 
ambiguous to import 'Adapters', for example.

Solution 2:

Add the outermost 'Lib' directory to sys.path and use fully qualified 
module names.  In the example above I could use this:

/Lib/Server/Db/Adapters/FireBirdConnection.py:

    from Lib.Server.Db.Adapters.DatabaseConnection import DatabaseConnection

In this case FireBirdConnection.py would be dependent on the full module 
path. Otherwise it is independent on the whole module path, it only 
depends on the 'upper level' module, regardless of its name. So here are 
the problems with this solution:


- What if I want to rename 'Server' to 'Middletire'? Should I change all 
of my files inside the 'Midletire' dir?
-What if I would like to unify the server and client Db sides? Should I 
rename "from Lib.Server.Db.Adapters.DatabaseConnection import 
DatabaseConnection" to "from Lib.Db.Adapters.DatabaseConnection import 
DatabaseConnection" in all files?
- Lastly, the import statements are too long.  They are hard to manage.

I would like to use something like

    from __uppermodule__.DatabaseConnection import DatabaseConnection

but probably there is a standard Pythoninc way to do it. Just I can't 
find it.
Maybe we can start a new PEP on this. :-)

Please advise.

p.s.: sorry for the long e-mail

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From xnews2 at fredp.lautre.net  Thu Apr 14 17:24:32 2005
From: xnews2 at fredp.lautre.net (Fred Pacquier)
Date: 14 Apr 2005 21:24:32 GMT
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<425e47a9$0$26352$db0fefd9@news.zen.co.uk>
	<mailman.1886.1113479564.1799.python-list@python.org>
	<v4vs51hm5d0jailbuif4m34hjfjoh9028a@4ax.com>
Message-ID: <Xns9638EE7F2479EPaCmAnRDLM@212.27.42.73>

Christos "TZOTZIOY" Georgiou <tzot at sil-tec.gr> said :

> Well, I take advantage of this "folding" idea for years now.  Do you
> remember DoubleSpace?  I was getting to the limits [1] of my 100 MiB
> hard disk, so I was considering upgrading my hardware.  A female
> friend of mine, knowing a little but not a lot about MS-DOS asked the
> eye-opening question: "why don't you reapply double space to the
> compressed drive?"

Any BBS-era old-timers here remember NABOB ? :-)

-- 
YAFAP : http://www.multimania.com/fredp/


From timr at probo.com  Wed Apr 27 02:48:24 2005
From: timr at probo.com (Tim Roberts)
Date: Tue, 26 Apr 2005 23:48:24 -0700
Subject: ADODB Currency type broken in Python win32?
Message-ID: <gucu61teo2pglbr3ilrbukgsdc5k0gisla@4ax.com>

It looks to me like the handling of the currency type in an ADODB
connecction from Python is broken.  Currency data in an Access database is
stored as a 64-bit integer, scaled by 10000.  In an ADODB recordset, this
is returned as a 2-tuple, where the second element is the currency value,
but the value is stored as a normal integer, not a lont integer.  Thus, it
fails for values greater than about $214,700 (2**32 / 10**4).

Here is an example:

  import win32com.client
  conn = win32com.client.Dispatch("ADODB.Connection")
  conn.Open("DRIVER={Microsoft Access Driver (*.mdb)};DBQ=anydatabase.mdb")
  cmd = win32com.client.Dispatch("ADODB.Command")
  cmd.ActiveConnection = conn
  cmd.CommandText = "SELECT CCur(250000) AS myMoney;"
  rs = cmd.Execute()[0]
  for f in rs.Fields:
    print f.Name
    print f.Type
    print f.Value

One would expect

  myMoney
  6
  (0, 2500000000L)

Instead, we get:

  myMoney
  6
  (0, -1794967296)

The value has wrapped at 2**31.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From tzot at sil-tec.gr  Wed Apr 20 12:00:30 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 19:00:30 +0300
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
	<d45t7e$fum$1@news.tsystems.kiev.ua>
Message-ID: <quuc61lmup1h0v52vr7mm0hc3sqpr6b8tu@4ax.com>

On Wed, 20 Apr 2005 18:38:40 +0300, rumours say that Maxim Kasimov
<kasimov at i.com.ua> might have written:

>> If you need more help, I would gladly send you the output of `man vi'
>> from a non-GNU Unix.  I can also send you the output of `man vim' from a
>> GNU system.

>is it wrong to debug python script using python, but not some magic commands found somewhere in man ?

If you really believe you should use python to debug (and edit perhaps?)
python, use idle and X11 forwarding through your ssh connection instead
of vi.  Then you have menu-driven block un/commenting and un/indenting.

Otherwise, I believe your reply above is slightly adrift (you wondered
what one can do to comment a block of code when using vi, and I replied
to that; I don't quite understand what your exact point is.)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From gvandyk.nospam at agileworks.net  Mon Apr 18 10:33:12 2005
From: gvandyk.nospam at agileworks.net (Gerrit van Dyk)
Date: Mon, 18 Apr 2005 16:33:12 +0200
Subject: ANN: Python Training In South Africa
Message-ID: <d40gf9$2ih$1@ctb-nnrp2.saix.net>

AgileWorks (Pty) Ltd will be presenting an "Introduction to Python" 
training course at "The Innovation Hub" from the 4-6th of May 2005.

For more detail visit our website: 
(http://www.agileworks.net/AgileWorks/Training/Python/)


From klaus at seistrup.dk  Mon Apr 18 04:29:27 2005
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Mon, 18 Apr 2005 08:29:27 +0000 (UTC)
Subject: Parse command line options
References: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd66rv7.9jg.klaus@main.szn.dk>

Hue wrote:

>     try:
>
>         opts,args = getopt.getopt(sys.argv[1:], 'n:t:h:i:o:',
> ["Number=","time=","help=","image_file=","Output Filename="])
>
>     except getopt.GetoptError:
>         print 'Unrecognized argument or option'
>         usage()
>         sys.exit(0)

Proceed with e.g.:

#v+

    for (opt, arg) in opts:
        if opt in ('-n', '--No'):
            do_no()
        elif opt in ('-t', '--Time'):
            do_time()
        # [...]
        else:
            barf(opt, arg)
        # end if
    # end for

#v-

But be consistent when using long options: use all lowercase, use either
dashes or underscores (not both), don't use whitespace.

I usually do something like:

#v+

    Options = {
        'i:': 'input=',
        'o:': 'output=',
        'c' : 'copyright',
        'h' : 'help',
        'v' : 'version',
    }
    shortOpts = ''.join(Options.keys())
    longOpts  = Options.values()

    # [...]

    try:
        (opts, args) = getopt.getopt(argv[1:], shortOpts, longOpts)
    except getopt.error, msg:
        die(msg)
    # end try

    # [...]

    for (opt, arg) in opts:
        # Handle all options
	    :
    # end for

#v-

Additional, non-option, arguments will be in the "args" variable.

Cheers,

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From matt.fryer at gmail.com  Wed Apr 27 10:36:28 2005
From: matt.fryer at gmail.com (Matt)
Date: 27 Apr 2005 07:36:28 -0700
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <1114612588.435456.296960@z14g2000cwz.googlegroups.com>

The ActiveGrid IDE is a sample app with wxPython. It has a lot of good
features including a source code debugger that allows you to debug wx
apps and set breakpoints from the code editor. I am also biased
though--I work on that IDE and use it for all my coding. Its pretty far
along on Windows and getting better on Linux. We just got it working on
a Mac yesterday so that version won't be out for a bit.



From franz.steinhaeusler at utanet.at  Tue Apr  5 05:38:50 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Tue, 05 Apr 2005 11:38:50 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com><mailman.1280.1112603141.1799.python-list@python.org>	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>
	<mailman.1299.1112626394.1799.python-list@python.org>
	<4251d375$0$23625$9b622d9e@news.freenet.de>
Message-ID: <b1n451t1t19hmtoq2bm3gp4bfnr65vatcd@4ax.com>

On Tue, 05 Apr 2005 01:53:25 +0200, "Martin v. L?wis"
<martin at v.loewis.de> wrote:

>Fredrik Lundh wrote:
>
>> I'm not aware of any other tool that solves that specific problem.
>
>notepad does a fine job at creating batch files, IMO.
>
>Of course, it is not all that clear what the OP actually wanted.
>[...]

Hi, here I am again, the OP :)

I think, I considered the problem more complicated as it is in fact.

Maybe a batch file (py23.bat: c:\python23\python.exe should be enough)

thanks again!

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From peufeu at free.fr  Wed Apr 13 11:32:24 2005
From: peufeu at free.fr (peufeu at free.fr)
Date: Wed, 13 Apr 2005 17:32:24 +0200
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<mailman.1841.1113405095.1799.python-list@python.org>
	<200504130853.31989.hancock@anansispaceworks.com>
	<op.so424whjqfv3if@localhost>
	<1113339252.851450.184620@z14g2000cwz.googlegroups.com>
Message-ID: <op.so6f4aqapda12i@localhost>

>> postgresql
>> is slower than MySQL, at least for modest size tables.  There must, I

	When not using transactions, MySQL will blow away postgres in  
INSERT/UPDATE speed until the concurrency gets up a bit and the readers  
block writers strategy used by MyISAM starts to show its weaknesses.
	This is in agreement with mass hosting for instance, a lot of small  
databases on a mysql will not have concurrency problems.
	Of course when not using transactions you have to remind that your data  
is not secure, and any power crash might corrupt your database.
	Postgres on a RAID with battery backed up cache will no longer have to  
sync the disk on each transaction so it gets a lot faster, and you still  
have data security. You can also run it with fsync=off for a massive  
speedup in transactions per second but you lose data security.
	When using transactions (innodb) I've read that postgres is a bit faster.
	Regarding query optimization, for simple dumb queries like grabbing a row  
 from a table, mysql will be a little faster (say 0.2 vs 0.3 ms), and for  
medium complex queries like joins on >= 4 medium sized tables (>10 K rows)  
postgres can be faster by anything from 1x to 1000x. I've seen it happen,  
the same query taking 0.5 seconds in my and 0.5 ms in postgres, simply  
because mysql can't plan it correctly.

>> suppose,
>> be some turnover point on the size of the database?  Or are you arguing  
>> that
>> postgresql is now faster than MySQL in the general case?  Can you

	I'd suggest that on anything medium postgres will be a lot faster.

> I don't know about the whole picture, but I know form evidence on this  
> group that there are PostgreSQL driver modules (the name "psycopg" comes  
> to mind, but this may be false memory) that appear to take diabolical  
> liberties with DBAPI-2.0, whereas my experience with MySQLdb has been  
> that I can interchange the driver with mxODBC (for example) as a drop-in  
> replacement (modulo the differing paramstyles :-().

	psycopg is extremely fast and powerful, so it makes a lot more things  
that the dbapi says.
	I'd say that database independence is an utopia, once you start to use  
triggers and stored procedures and specific column types, you'll be more  
or less tied to one database, and doing this is necessary to get good  
performance and generally do things right.


From rschroev_nospam_ml at fastmail.fm  Mon Apr 11 11:13:20 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 11 Apr 2005 15:13:20 GMT
Subject: database in python ?
In-Reply-To: <5n2qi2-g9g.ln1@pluto.i.infosense.no>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost> <5n2qi2-g9g.ln1@pluto.i.infosense.no>
Message-ID: <kuw6e.62266$8c.4532354@phobos.telenet-ops.be>

Ola Natvig wrote:

> MySQL has support for transactions and foreign keys in it's InnoDB
> engine. In 5.0 it supports views procedures. Some people seems to hate
> MySQL :-) but a whole lot of other people like it a lot.

There are other problems, such as failing silently in many
circumstances, as documented on http://sql-info.de/mysql/gotchas.html.
I'm not saying these issues should make one avoid MySQL at all costs,
but I think one should at least be aware of them.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From jerf at jerf.org  Thu Apr 14 16:17:25 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 14 Apr 2005 16:17:25 -0400
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<425e47a9$0$26352$db0fefd9@news.zen.co.uk>
	<mailman.1886.1113479564.1799.python-list@python.org>
	<425e8d34$0$2589$da0feed9@news.zen.co.uk>
	<mailman.1913.1113493743.1799.python-list@python.org>
Message-ID: <pan.2005.04.14.20.17.24.623594@jerf.org>

On Thu, 14 Apr 2005 17:44:56 +0200, Fredrik Lundh wrote:

> Will McGugan wrote:
> 
>> Muchas gracias. Although there may be a bug. I compressed my Evanescence
>> albumn, but after decompression it became the complete works of Charles
> 
> strange.  the algorithm should be reversible.  sounds like an operating
> system bug.  what system are you using?
> 
> </F>

After I compressed my OS (on the other machine) with your code, none,
apparently.


From simon.brunning at gmail.com  Wed Apr 20 06:36:45 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 11:36:45 +0100
Subject: goto statement
In-Reply-To: <42662f0a$1_2@news.bluewin.ch>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2160.1113991926.1799.python-list@python.org>
	<42662f0a$1_2@news.bluewin.ch>
Message-ID: <8c7f10c6050420033658165014@mail.gmail.com>

On 4/20/05, Maurice Caret <ruses at users.snip.snip.ch> wrote:
> 
> other equivalents are in
> 
> http://docs.python.org/tut/node10.html

I also missed <http://docs.python.org/tut/node5.html#SECTION005200000000000000000>,
for the while statement.

Those URLs just keeg getting better...

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From donn at drizzle.com  Sun Apr 24 13:32:21 2005
From: donn at drizzle.com (Donn Cave)
Date: Sun, 24 Apr 2005 17:32:21 -0000
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net>
	<mailman.2379.1114319143.1799.python-list@python.org>
	<86ll78r63a.fsf@guru.mired.org>
Message-ID: <1114363940.742689@yasure>

Quoth Mike Meyer <mwm at mired.org>:
...
| He's right - programming is an offshoot of mathematics. It adds
| *dynamics* to the structures of mathematics. In mathematics, a
| construct (graph, function, mapping, set, whatever) is immutable. You
| can talk about things that change with time, but you do so with a
| function f(t) that describes the changes to the thing over time - and
| *that* function is immutable. You can say that it isn't time that's
| changing, but frobnitz, with the same function describing the change -
| and you get the same structures that you got with time.
|
| This change causes a fundamental change in the way practitioners
| *look* at objects. Which is visible as a change in the
| vocabulary. Yes, you can talk about programming with the vocabulary of
| mathematics. But that's like dancing about architecture (*).

There's a school of thought that holds this to be kind of an offshoot
of programming, too, albeit a dominant one at present.  In a "pure"
functional programming language like Haskell for example, the "="
operator is equational in about the same way as it is in mathematics.

Even Haskell's equivalent of "foo = raw_input()", the notation that
appears to create a variable is strictly bound to an underlying system
of functions and equations that preserves this equational property,
and maybe for the sake of harmony between mathematicians this system
could be applied to Python's semantics to show how it works in these
terms.  I guess it couldn't be done without some hand-waving, due to
non-functional structures like loops, but those are just details.

So here's a tiny Haskell example that reads a line from input and
prints it out with quotes around it:

   module Main (main) where
   main = do
       line <- getLine
       putStrLn (show line)

"main" is (=) a function that can be executed with that result.
This executability is a property of the "IO Monad", and this
function has that type -- main :: IO () -- but that's more than
we need to know for the present purposes.  The point is that
this "do" structure looks like a statement syntax, but it's
strictly equivalent to another more functional notation

   main = getLine >>= (\line -> putStrLn (show line))

Haskell's lambda syntax: \ arg -> expression.  You could read this
aloud as "bind getLine to a lambda function with one parameter ..."
and the result is a functional relation that can be executed.
Each step binds a function to a lamba that forms the entire rest
of the "do" block, not just the next step -- it's a nested sequence,
not a linear one.

So I'm proposing that Python's = operator is like Haskell's "<-",
and "foo = 5" is conceptually like "bind 5 to a lambda with one
argument "foo" implementing the rest of the procedure body."  The
confusion is not because foo needs to be so different, it's that
Python "=" is not at all math "=".

	Donn Cave, donn at drizzle.com


From steve at holdenweb.com  Tue Apr  5 10:53:45 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 10:53:45 -0400
Subject: Real ython Poetry [was: Re: boring the reader to death...]
In-Reply-To: <424e8d1d$1@nntp0.pdx.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<pan.2005.04.01.15.50.51.219430@jerf.org>	<iUe3e.21015$d5.156054@newsb.telia.net>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<Rdo3e.21051$d5.155911@newsb.telia.net>	<mailman.1221.1112416371.1799.python-list@python.org>	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net>
Message-ID: <4252A679.2030102@holdenweb.com>

Scott David Daniels wrote:
> Sunnan wrote:
> 
>> ...Because what is "boring"? The opposite of dense, tense, intense. 
>> Utterly predictable; it's like the combination of all my prejudices. 
>> Even before I knew, I thought "Bet Python separates statements from 
>> expressions".
> 
> 
> Python is for terse, pithy prose; Python is not for poetry.
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org

I though that too, until Michael Spencer sent me the following
executable Python limerick, which I declared the PyCon limerick
competition and read as a part of my closing address:

# Freely re-distributable under Poetic License*
# Voice only the alphanumeric tokens

from itertools import repeat
for feet in [3,3,2,2,3]:
     print " ".join("DA-DA-DUM"
     for dummy in [None]
for foot in repeat("metric", feet))

*thanks to Peter Hansen

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From chad at zetaweb.com  Tue Apr 26 23:58:42 2005
From: chad at zetaweb.com (Chad Whitacre)
Date: Tue, 26 Apr 2005 23:58:42 -0400
Subject: parse tree has symbols not in the grammar?
Message-ID: <d4n2c7$sj1$1@sea.gmane.org>

Hey all,

I've been playing around with the parser module, and based on the 
documentation I would expect all symbols in a parse tree to be part of 
the grammar.[1] For example, I find this line in the symbol module docs:

   Refer to the file Grammar/Grammar in the Python distribution for the
   definitions of the names in the context of the language grammar.[2]

However, the program below gives me a human-readable parse tree (also 
below) that contains symbols that don't seem to be in the grammar, e.g., 
small_stmt, expr_stmt, factor. Is my expectation wrong?

Thanks.



chad

----------

[1] http://python.org/doc/ref/grammar.txt
[2] http://python.org/doc/lib/module-symbol.html



############################
#   A PROGRAM              #
############################

#!/usr/bin/env python
"""print out a human-readable parse tree for a simple code block
"""

import parser, symbol, token
from pprint import pprint

def experiment(block):
     """experimenting, like the man said
     """

     ast = parser.suite(block)
     raw = ast.tolist()

     def interp(x):
         """given an int or a string, return a symbol, token, or other 
string
         """
         if type(x) is type(0):
             if x < 256:
                 return token.tok_name[x]
             else:
                 return symbol.sym_name[x]
         return x

     def process(raw):
         """recursively convert a raw parse tree into something readable
         """
         for node in raw:
             if type(node) is type([]):
                 process(node)
             else:
                 raw[raw.index(node)] = interp(node)

     process(raw)
     pprint(raw)


experiment("""\

x = 3
for y in range(10):
     y == x

""")



############################
#   ITS OUTPUT             #
############################

['file_input',
  ['stmt',
   ['simple_stmt',
    ['small_stmt',
     ['expr_stmt',
      ['testlist',
       ['test',
        ['and_test',
         ['not_test',
          ['comparison',
           ['expr',
            ['xor_expr',
             ['and_expr',
              ['shift_expr',
               ['arith_expr',
                ['term',
                 ['factor', ['power', ['atom', ['NAME', 'x']]]]]]]]]]]]]]],
      ['EQUAL', '='],
      ['testlist',
       ['test',
        ['and_test',
         ['not_test',
          ['comparison',
           ['expr',
            ['xor_expr',
             ['and_expr',
              ['shift_expr',
               ['arith_expr',
                ['term',
                 ['factor',
                  ['power', ['atom', ['NUMBER', '3']]]]]]]]]]]]]]]]],
    ['NEWLINE', '']]],
  ['stmt',
   ['compound_stmt',
    ['for_stmt',
     ['NAME', 'for'],
     ['exprlist',
      ['expr',
       ['xor_expr',
        ['and_expr',
         ['shift_expr',
          ['arith_expr',
           ['term', ['factor', ['power', ['atom', ['NAME', 'y']]]]]]]]]]],
     ['NAME', 'in'],
     ['testlist',
      ['test',
       ['and_test',
        ['not_test',
         ['comparison',
          ['expr',
           ['xor_expr',
            ['and_expr',
             ['shift_expr',
              ['arith_expr',
               ['term',
                ['factor',
                 ['power',
                  ['atom', ['NAME', 'range']],
                  ['trailer',
                   ['LPAR', '('],
                   ['arglist',
                    ['argument',
                     ['test',
                      ['and_test',
                       ['not_test',
                        ['comparison',
                         ['expr',
                          ['xor_expr',
                           ['and_expr',
                            ['shift_expr',
                             ['arith_expr',
                              ['term',
                               ['factor',
                                ['power',
                                 ['atom',
                                  ['NUMBER',
                                   '10']]]]]]]]]]]]]]]],
                   ['RPAR', ')']]]]]]]]]]]]]]],
     ['COLON', ':'],
     ['suite',
      ['NEWLINE', ''],
      ['INDENT', ''],
      ['stmt',
       ['simple_stmt',
        ['small_stmt',
         ['expr_stmt',
          ['testlist',
           ['test',
            ['and_test',
             ['not_test',
              ['comparison',
               ['expr',
                ['xor_expr',
                 ['and_expr',
                  ['shift_expr',
                   ['arith_expr',
                    ['term',
                     ['factor',
                      ['power', ['atom', ['NAME', 'y']]]]]]]]]],
               ['comp_op', ['EQEQUAL', '==']],
               ['expr',
                ['xor_expr',
                 ['and_expr',
                  ['shift_expr',
                   ['arith_expr',
                    ['term',
                     ['factor',
                      ['power', ['atom', ['NAME', 'x']]]]]]]]]]]]]]]]],
        ['NEWLINE', '']]],
      ['DEDENT', '']]]]],
  ['NEWLINE', ''],
  ['ENDMARKER', '']]



From bokr at oz.net  Fri Apr  1 03:39:22 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 01 Apr 2005 08:39:22 GMT
Subject: System bell
References: <BE723DD5.63FD%baza@themauvezone.fsnet.co.uk>
	<20050331235011.GD1786@ActiveState.com>
	<mailman.1171.1112339197.1799.python-list@python.org>
Message-ID: <424d0662.7277153@news.oz.net>

On Fri, 01 Apr 2005 02:06:07 -0500, Steve Holden <steve at holdenweb.com> wrote:

>Trent Mick wrote:
>> [Baza wrote]
>> 
>>>Am I right in thinking that >>>print "\a" should sound the system, 'bell'?
>> 
>> 
>> It works on the shell on Windows for me (WinXP).
>> 
>> Trent
>> 
>Interesting. From a Cygwin bash shell I got an elegant little dingish 
>sort of a beep (my volume control was set kind of low). I then ran the 
>same code in a Windows shell and nearly deafened myself. It appears that 
>the volume control doesn't affect the Windows XP commans shell beep - 
>even muting the Windows audio output doesn't stop it (though it does 
>stop the Cygwin beep). This could cause heart attacks!
>
Another couple of data points:

Running python 2.3/MSVC6 or python 2.4/MinGW in an NT4 console window,
print '\a' beeps via the PC internal speaker (like winsound.Beep).

Running the bash shell of msys, echo -e '\a' also beeps via the PC speaker.
These are not affected by any volume control that I know of.

But running py2.3 idle, print '\a' displays a square empty box (which I
take to be the symbol for "unprintable" characters). That seems like an
oversight in terminal emulation.

Regards,
Bengt Richter


From m at m.com  Wed Apr 27 09:40:49 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 21:40:49 +0800
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
Message-ID: <426f9661$1_2@rain.i-cable.com>

> And then example.pyc will appear beside example.py. This new file does
> not require example.py (you can even delete it), and works on any
> computer with Python installed

Filip, you can read through my mind (-: You just told me what I want to know
exactly, even I can't ask the question correctly. Thx..

> python24\python -OO)
> and then import your example.py, you will get a file example.pyo,
> which is also stripped of any documentation strings (a bit harder to
> decode).

Is .pyo still not secure for serious purpose? The -OO function refer to
which area of python that I can read a doc in details?

> The end-user needs the JRE, not Python.
>
> Kent

Actually I still not dare to touch Jython, because I am still digging python
now. But the JRE may not attract end-user, because it is still associate
with "slow" and "eating much system resource", although Java is sure a
respectfully programming language. What do you think?




From peter at engcorp.com  Thu Apr 28 20:57:51 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 28 Apr 2005 20:57:51 -0400
Subject: anonymous function objects?
In-Reply-To: <d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
	<d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
Message-ID: <tNednbwm1NXyG-zfRVn-gw@powergate.ca>

Uwe Mayer wrote:
> Unfortunately I want to assign a handler function to an object and something
> like this does not work:
> 
>>>>class Foobar(object): pass
> 
> ...
> 
>>>>a = Foobar()
>>>>def a.handler():
> 
>   File "<stdin>", line 1
>     def a.handler():
>          ^
> SyntaxError: invalid syntax

But this does work, or something close to it:

 >>> class Foobar(object): pass
...
 >>> def handler(self):
...   print 'in handler'
...
 >>> f = Foobar()
 >>> f.handler()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: 'Foobar' object has no attribute 'handler'
 >>>
 >>> import new
 >>> f.handler = new.instancemethod(handler, f)
 >>> f.handler()
in handler


-Peter


From max2 at fisso.casa  Sat Apr  9 17:30:34 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 09 Apr 2005 21:30:34 GMT
Subject: visibility between modules
Message-ID: <_PX5e.1205415$35.44366387@news4.tin.it>

hi.

if i have a single program file, different class instances can share 
information in (at least) two fashions:

1. using instance variables:

class AClass:
   def __init__(self):
     self.att_1 = 42
     self.att_2 = "Hello!"

class AnotherClass:
   def __init__(self):
     self.att_1 = anInstanceOfAClass.att_1

anInstanceOfAClass = AClass()
anInstanceOfAnotherClass = AnotherClass()
print anInstanceOfAnotherClass.att_1  ### This should print out 42

2. using globals:

class AClass:
   def __init__(self):
     self.att_1 = 42
     self.att_2 = "Hello!"

class AnotherClass:
   pass

aGlobalString = "No way."
anInstanceOfAClass = AClass()
anInstanceOfAClass.att2 = aGlobalString
anInstanceOfAnotherClass = AnotherClass()
anInstanceOfAnotherClass.att_1 = aGlobalString
print anInstanceOfAClass.att2  ### This should output "No way."
print anInstanceOfAnotherClass.att_1  ### And this too

----

i admit i prefer the fisrt way to do it. i have tried to make it work 
even if the "main program" and each class definition reside in different 
files, but i could not make it work:

max2 at 172.17.1.201:/tmp$ cat AClass.py
class AClass:
   def __init__(self):
     self.att_1 = 42
     self.att_2 = "Hello!"
max2 at 172.17.1.201:/tmp$ cat AnotherClass.py
class AnotherClass:
   def __init__(self):
     self.att_1 = anInstanceOfAClass.att_1
max2 at 172.17.1.201:/tmp$ cat Main.py
from AClass import *
from AnotherClass import *
anInstanceOfAClass = AClass()
anInstanceOfAnotherClass = AnotherClass()
print anInstanceOfAnotherClass.att_1  ### This should print out 42
max2 at 172.17.1.201:/tmp$ python Main.py
Traceback (most recent call last):
   File "Main.py", line 4, in ?
     anInstanceOfAnotherClass = AnotherClass()
   File "/tmp/AnotherClass.py", line 3, in __init__
     self.att_1 = anInstanceOfAClass.att_1
NameError: global name 'anInstanceOfAClass' is not defined
max2 at 172.17.1.201:/tmp$

----

any suggestion?

bye max


From lbruno at republico.estv.ipv.pt  Thu Apr  7 06:31:11 2005
From: lbruno at republico.estv.ipv.pt (Luis Bruno)
Date: Thu, 7 Apr 2005 11:31:11 +0100
Subject: logging as root using python script
In-Reply-To: <d32vf7$tl$1@sea.gmane.org>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
	<20050407105048.00004cd2@LAB2-13.esi> <d32vf7$tl$1@sea.gmane.org>
Message-ID: <20050407113111.000059aa@LAB2-13.esi>

Martin Franklin wrote:
> another alternative would be setuid

I also thought about making the script setuid root, but I'm under the 
impression that Linux (at least) won't honor the suid bit on a script.
That's from memory though.

Cheers!


From t.bettio at transnorm.ch  Wed Apr 20 13:49:47 2005
From: t.bettio at transnorm.ch (Tiziano Bettio)
Date: Wed, 20 Apr 2005 19:49:47 +0200
Subject: newbie question
In-Reply-To: <rj4ij2-pi5.ln1@lairds.us>
References: <465db603.0504191314.5d074cf8@posting.google.com>	<1113947675.400070.319430@o13g2000cwo.googlegroups.com>	<mailman.2137.1113949084.1799.python-list@python.org>
	<rj4ij2-pi5.ln1@lairds.us>
Message-ID: <4266963B.3060001@transnorm.ch>

Cameron Laird wrote:

>In article <mailman.2137.1113949084.1799.python-list at python.org>,
>Tiziano Bettio  <t.bettio at transnorm.ch> wrote:
>			.
>			.
>			.
>  
>
>>If u want to achieve high performance you'd rather use c++ and directly 
>>access libs like nvidias cg, ms directx or opengl...
>>    
>>
>			.
>			.
>			.
>Yes.  Well, maybe.  Python-coded programs, even graphically-intense
>games, *can* exhibit good performance, and there are numerous 
>anecdotes about applications LOSING speed on conversion to C++ from
>Python.  Moreover, there's no inherent conflict between C++ and
>Python; some successful applications use both.
>
>My summary:  it's a subtler matter than, "for performance, abandon
>Python on favor of C++".  I think you know that, but I want to make
>it explicit for less-experienced readers.
>  
>
yeah well, i didn't intended to say it in this specific way. tough to be 
more exact: for a game you can realize up to 95% in python without 
losing the needed performance. but there's almost always a little part 
where u really need to get even the last bit of performance out of the 
hardware or where nobody has already ported the lib you need into 
python, where c++ comes in rather handy.

I didn't ment to offend any pythonian (wouldn't want to offend 
myself...), but i think we all agree that sometimes all of us have seen 
or even programmed something in c++ (or other languages) what could come 
in really handy for a project one is working on.

so again, didn't ment to say that it's a performance matter (there are 
thousands of bad c++ programmers out there which are hiding behind 
compiled code...) :)

cheers tc


From aleksander.helgaker at gmail.com  Wed Apr 20 08:31:15 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 20 Apr 2005 05:31:15 -0700
Subject: building a small calculator
In-Reply-To: <mailman.2168.1113999910.1799.python-list@python.org>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
	<mailman.2168.1113999910.1799.python-list@python.org>
Message-ID: <1114000275.227950.50870@f14g2000cwb.googlegroups.com>

I get the following error message when using the command sys.exit().

name 'sys' is not defined.



From fredrik at pythonware.com  Fri Apr  8 16:05:04 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 22:05:04 +0200
Subject: problem saving tif files with PIL
References: <BAY9-F21CE02DE11077B72B31138D03F0@phx.gbl>
Message-ID: <d36o0r$r1a$1@sea.gmane.org>

"mchl gdbt" <mchlgdbt at hotmail.com> wrote:

> Ideally, I want the output image to be identical to the original in every way.  I suspect that it 
> might be enough to just change the size numbers though I don't know how.  I will be messing around 
> with the pixel colours eventually but the structure of the image must remain basically identical 
> so that application B works as before.

PIL's an image manipulation library, not a TIFF manipulation library.

for TIFF manipulation, using pytiff (and the underlying libtiff library) is probably
your best bet:

    http://pubweb.northwestern.edu/~omh221/software_projects/pytiff/

</F> 





From chromeclouds at yahoo.co.uk  Tue Apr 12 06:55:56 2005
From: chromeclouds at yahoo.co.uk (Mark)
Date: 12 Apr 2005 03:55:56 -0700
Subject: Cannot import mod_python modules
Message-ID: <6c9897c2.0504120255.1f274@posting.google.com>

Hi, I've just installed the Win32 build of mod_python 3.1.4 for Python
2.4 and have setup my Apache config file with the LoadModule and
PythonHandler directives and then copied "mod_python.so" to my Apache
modules directory.

I restarted Apache and decided to do a quick cgi.test() and it shows
that mod_python listed under server software section.

OK, next I tried mptest.py, but I get an Internal Server Error. The
traceback recorded in the error log says "No module named _apache"

mptest.py:

from mod_python import apache

def handler(req):
    req.write("Hello World!")
    return apache.OK

Why doesn't this work? or rather what have I missed?


From vze4rx4y at verizon.net  Sat Apr 30 04:44:21 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 30 Apr 2005 08:44:21 GMT
Subject: Micro-PEP: str.translate(None) to mean identity translation
References: <4272e00c.260731842@news.oz.net>
Message-ID: <FzHce.2828$Ab.1209@trndny04>

[Bengt Richter]
> Just thought None as the first argument would be both handy and mnemonic,
> signifying no translation, but allowing easy expression of deleting
characters,
> e.g.,
>
>    s = s.translate(None, 'badcharshere')

Log a feature request on SF and assignment to me.
I'll put this in for you.


Raymond Hettinger




From sunnan at handgranat.org  Tue Apr  5 20:42:04 2005
From: sunnan at handgranat.org (Sunnan)
Date: Wed, 06 Apr 2005 00:42:04 GMT
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <MPG.1cbc851a10cc76ad9896c1@news.dsl.napanet.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<87is3663cn.fsf@wilson.rwth-aachen.de>
	<3b99ncF6fd2apU1@individual.net>
	<3g_3e.134005$dP1.471451@newsc.telia.net>
	<MPG.1cbc851a10cc76ad9896c1@news.dsl.napanet.net>
Message-ID: <wfG4e.21459$d5.157841@newsb.telia.net>

T.D. Lassagne wrote:
> Please consider joining the International Sarcasm Society.  Our motto is 
> "Like We Need YOUR Support". 

I *recognize* sarcasm; I just don't think it's very funny. Now parody, 
which this turned out to be, I can appreciate.


From deetsNOSPAM at web.de  Sat Apr  2 08:17:31 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 02 Apr 2005 15:17:31 +0200
Subject: Python plug-in Frameworks like Eclipse RCP...
References: <mLidnbmI_5AzzNbfRVn-jQ@comcast.com>
	<yuCdnYkIPpMBhtPfRVn-tA@comcast.com>
Message-ID: <d2m61b$lh5$04$1@news.t-online.com>

Jim Hargrave wrote:

> Hum, maybe my question was too specific. What I would really like to
> know is what is the best way to implement a Python application with a
> pluggable architecture. In particular, I would like to use wxPython and
> have plug ins automatically register themselves with the GUI by adding
> themselves to the mean or adding a tab. Again this is much like Eclipse
> RCP - but forget that part :-)


This is close to beeing trivial in python - just utilize __import__ to
dynamically load modules that shall act as plugins. These modules then only
have to follow a sort of protocol - lets say you have a module called

pluginloader.py

that has a register-function. The loaded module could import pluginloader
and register itself, or a class defined in itself. Like this

---------plugin_example.py-------------

import pluginloader


class ExamplePlugin(pluginloader.PluginBase):
     def __init__(self,...):
         ....



pluginloader.register(ExamplePlugin())

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



-- 
Regards,

Diez B. Roggisch


From peufeu at free.fr  Tue Apr 12 07:21:14 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 13:21:14 +0200
Subject: semicolons
References: <425AF6AB.900@mage.hu>
	<mailman.1733.1113287984.1799.python-list@python.org>
Message-ID: <op.so39towpqfv3if@localhost>


	sometimes i'll write

	if( key in myarray ) { ...

	in PHP and then realize I have to use array_key_exists and curse that the  
parameters are key then array, and bless scite auto-api-display for saving  
me each time...


From removethis.kartic.krishnamurthy at gmail.com  Thu Apr 28 18:02:52 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 28 Apr 2005 22:02:52 GMT
Subject: why "import wx" doesn't work?
In-Reply-To: <42715a8b$1_1@rain.i-cable.com>
References: <427126ca$1_3@rain.i-cable.com>
	<VDcce.981$PA3.377@newssvr31.news.prodigy.com>
	<42715a8b$1_1@rain.i-cable.com>
Message-ID: <g4dce.989$nM3.794@newssvr31.news.prodigy.com>

The Great 'monkey' uttered these words on 4/28/2005 5:50 PM:
>>Which version of wxPython are you running? What do you mean by "does not
>>work"...does the import fail or is your code giving errors?
> 
> 
> It is the current new version 2.6. The error message said that the class
> wxApp is not defined...
> But when using the default "from wxPython.wx import *", it works.



See my previous post for examples... you are mixing the new import style 
and old style of using the classes. That will not work.

Thanks,
-K


From codecraig at gmail.com  Fri Apr 22 13:41:49 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 10:41:49 -0700
Subject: gui developing
In-Reply-To: <mailman.2295.1114191326.1799.python-list@python.org>
References: <mailman.2295.1114191326.1799.python-list@python.org>
Message-ID: <1114191709.671893.254560@o13g2000cwo.googlegroups.com>

I am fairly new to Python as well.  However, coming from a Java
background and Swing...I jumped into Jython.  It let me use my previous
swing knowledge to make GUI's.  However, python comes with Tkinter
which is the 'standard' gui library.  I'd suggest checking out Tkinter,
but i dont have much experience with others.

some other ones I have heard about... wxWidgest, and Python Card



From jfouhy at paradise.net.nz  Tue Apr 26 19:13:09 2005
From: jfouhy at paradise.net.nz (jfouhy at paradise.net.nz)
Date: 26 Apr 2005 16:13:09 -0700
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com>
Message-ID: <1114557189.561270.233350@f14g2000cwb.googlegroups.com>

Tim Daneliuk wrote:
> OK - Here's some reasoning that may illuminate it.  We could, in
theory,
> reduce any language to the minimal Boehm & Jacopini control
structures
> (iirc there were only four).  In effect, anything beyond these is
> syntactic sugar.  IOW, feel free to use a minimalist Turing Machine
> to implement your next 100,000 line program.

Now, how does it go ...

#!/usr/bin/env python

_pc = 1
while True:
    if _pc == 1:
        # statement 1
        _pc = _pc + 1
    elif _pc == 2:
        # statement 2
        _pc = _pc + 1
    elif pc == 3:
        # statement 3
        _pc = 17       # GOTO 17
    elif pc == 4:
        # statement 4
        _pc = _pc + 1
    ...
    else:
        # Fallen off the end of our program.
        break



From lostboard2001 at yahoo.com  Fri Apr  1 20:44:03 2005
From: lostboard2001 at yahoo.com (lostboard2001 at yahoo.com)
Date: 1 Apr 2005 17:44:03 -0800
Subject: Search-and-delete text processing problem...
In-Reply-To: <0eadnS8Lk5Aaa9DfRVn-gw@speakeasy.net>
References: <0eadnS8Lk5Aaa9DfRVn-gw@speakeasy.net>
Message-ID: <1112406243.575705.99350@g14g2000cwa.googlegroups.com>

Close:

>     if line[:4] == 'Bill':
.             ^^
>         line == ' '
>



From iayork at panix.com  Tue Apr 26 15:07:12 2005
From: iayork at panix.com (Ian A. York)
Date: Tue, 26 Apr 2005 19:07:12 +0000 (UTC)
Subject: python on mac keystroke
References: <2Fhbe.1394$zu.7@newssvr13.news.prodigy.com>
Message-ID: <d4m3h0$sma$1@reader1.panix.com>

In article <2Fhbe.1394$zu.7 at newssvr13.news.prodigy.com>,
Eric Texier  <erictexier at sbcglobal.net> wrote:
>I am testing python on a mac. In the python console, none of the
>control as the arrow to scroll back to a preview line are
>working. How can I fix this.

If I understand what you're asking, you need to install readline, which 
isn't included in the OSX Python.

Ian 
-- 
    Ian York   (iayork at panix.com)  <http://www.panix.com/~iayork/>
    "-but as he was a York, I am rather inclined to suppose him a
     very respectable Man." -Jane Austen, The History of England


From cjw at sympatico.ca  Thu Apr  7 10:22:14 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 07 Apr 2005 10:22:14 -0400
Subject: Best editor?
In-Reply-To: <1112755142.335149.218220@g14g2000cwa.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<1112755142.335149.218220@g14g2000cwa.googlegroups.com>
Message-ID: <nmb5e.6486$6k4.806137@news20.bellglobal.com>

Paul McGuire wrote:
> SciTE (Scintilla Text Editor) is just right for me too.  Low overhead,
> great just as a Notepad alternative, but with good coding support too.
> 
> -- Paul
> 
Yes, I use SciTE.  Syntax marking and multiple buffers. Works with 
Windows and Linux.

Boa-constructor (Scintilla based editor), aside from being a GUI 
designer, provides all of the above, with a debug capability.

PythonWin (scintilla based editor) is Windows only. It provides the 
Edit/Debug functionality of Boa and has an excellent auto-completion 
facility - this is particularly helpful when one doesn't remember the 
name or parameters of a function of method.  It currently has a bug 
which slows things down at times but, I understand that this is fixed in 
the forthcoming build 204.


From philippe at philippecmartin.com  Thu Apr 14 19:17:02 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Thu, 14 Apr 2005 23:17:02 GMT
Subject: Using python from a browser/security hole
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
Message-ID: <ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>

Since I need to access a local/client device from the page and that I wish
to be cross-platform; does that mean Java is my only way out ?

Regards,

Philippe



Neil Hodgson wrote:

> Philippe:
> 
>> I read that IE had the capability to embedd Python scripts, but what
>> about the others ?
> 
>    While Python can be set up as a scripting language for IE, this is
> normally disabled as it could be a security hole. The open call is
> available from Python scripts so a web site could read or destroy your
> files.
> 
>    Neil



From bokr at oz.net  Sun Apr 17 18:14:37 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 22:14:37 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
	<Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>
	<4261c943.136032804@news.oz.net> <3cf2qfF6jo33oU1@individual.net>
Message-ID: <4262c4b2.200399789@news.oz.net>

On Sun, 17 Apr 2005 15:25:04 +0200, Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:

>Bengt Richter wrote:
>
>> Stretching for it, using my latest and greatest ;-)
>> 
>>     y = f(**::
>>            x = 1
>>            y = 'y for f'
>>         )*g(**::
>>            x = 'x for g'
>>            y = 'y for g'
>>            def foo(): return 'foo for g'
>>         )
>> 
>> Note that there is no problem adding other parameters, because ::<suite> is just
>> a unary expression returning dict subtype instance, e.g.,
>> 
>>     y = f(11,22,**::
>>            x = 1
>>            y = 'y for f'
>>         )*g(*args_from_somewhere, **::
>>            x = 'x for g'
>>            y = 'y for g'
>>            def foo(): return 'foo for g'
>>         )
>
>You know that this is dead ugly?
What aspect in particular? I.e., does this (currently legal) look prettier:

       y = f(11,22, **dict(
              x = 1,
              y = 'y for f'
           ))*g(*args_from_somewhere, **dict(
              x = 'x for g',
              y = 'y for g',
              foo = lambda: return 'foo for g'
           ))

Can you express the same semantics in a prettier way?

To boil it down, doesn't a suite bindings expression like

      d = ::
          x = 1
          y = 'y for f'    

(which in this case doesn't even need parens) seem prettier than

      d = dict(
          x = 1,
          y = 'y for f'
      )

to you, especially given that (:: ...) gives you the power
of full suite syntax to create bindings
any way you want[1], not just keyword=<expression> ?
(and you can leave out the commas ;-)

[1] I.e., this should work to extend the power of the type expression in a way
that shows what you can't do with dict(...) ;-)

     type('C', (), ::
         def __repr__(self):
             return '<alternatively-created-class-object at %08x>'% (hex(id(self)&(2L**32-1))
         def cname(self): return type(self).__name__
         classvar = 123
         # ... anything you can do in a class definition body
     )

IMO that's pretty clean.

>
>The real ``problem'' (if you see one) is that the indentation syntax
>doesn't allow for suites in expressions.

I was trying to solve that "problem" with my "suite expressions" ;-)

   ::<suite>                  # suite bindings expression (as ordered dict)
   def(<arglist>):<suite>     # anonymous def
   (<arglist>):<suite>        # thunk (anonymous callable suite sharing local namespace)

I think suite indentation rules for suite expressions are not that hard, once you decide
to deal with it as a separate indentation space from outside the expression. That's already
done to allow multiline expressions without indentation interpretation inside bracketed expressions.
This is just adding indentation processing within certain types of expressions ("suite expressions" ;-)

For the most part I like indentation syntax very well, and
I suspect that if there were optional brackets, you would still be indenting
for clarity, so the chances are the bracket version of the above would
mainly add bracket noise to something close to the above.

Regards,
Bengt Richter


From codecraig at gmail.com  Thu Apr 14 18:31:17 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 15:31:17 -0700
Subject: SimpleXMLRPCServer - disable output
In-Reply-To: <mailman.1930.1113511323.1799.python-list@python.org>
References: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>
	<mailman.1930.1113511323.1799.python-list@python.org>
Message-ID: <1113517877.473126.259590@o13g2000cwo.googlegroups.com>


Jeremy Jones wrote:
> codecraig wrote:
>
> >Hi,
> >  I thought I posted this, but its been about 10min and hasnt shown
up
> >on the group.
> >  Basically I created a SimpleXMLRPCServer and when one of its
methods
> >gets called and it returns a response to the client, the server
prints
> >some info out to the console, such as,
> >
> >localhost - - [14/Apr/2005 16:06:28] "POST /RPC2 HTTP/1.0" 200 -
> >
> >Anyhow, is there a way I can surpress that so its not printed to the
> >console? I looked at SimpleXMLRPCServer.py ...it doesn't explicitly
> >print that, I think perhaps std is...but not sure.   Any ideas??
> >
> >thanks.
> >
> >
> >
> Here's the entire SimpleMLRPCServer class from SimpleXMLRPCServer.py:
>
>
> class SimpleXMLRPCServer(SocketServer.TCPServer,
>                          SimpleXMLRPCDispatcher):
>     """Simple XML-RPC server.
>
>     Simple XML-RPC server that allows functions and a single instance
>     to be installed to handle requests. The default implementation
>     attempts to dispatch XML-RPC calls to the functions or instance
>     installed in the server. Override the _dispatch method inhereted
>     from SimpleXMLRPCDispatcher to change this behavior.
>     """
>
>     def __init__(self, addr,
requestHandler=SimpleXMLRPCRequestHandler,
>                  logRequests=1):
>         self.logRequests = logRequests
>
>         SimpleXMLRPCDispatcher.__init__(self)
>         SocketServer.TCPServer.__init__(self, addr, requestHandler)
>
> You should be able to change logRequests to 0 and that should fix it.
 I just tested it at a prompt and it worked just fine.
>
>
> Jeremy Jones

Jeremy,
  So can you explain what I can do to set logRequests = 0?  Do i just
do..

server = SimpleXMLRPCServer(0)  ???

I am sorta new to python thanks.



From jimmy at retzlaff.com  Fri Apr 15 20:37:07 2005
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Fri, 15 Apr 2005 17:37:07 -0700
Subject: py2exe - create one EXE
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F380B76@MAYOR.retzlaff.com>

Codecraig wrote:
> i tried the SingleInstaller link....which points to a
> script using NSIS.  I followed those instructions which generated an
> .exe.   HOwever, when i run the .exe nothing happens (meaning no
> process starts, no output, no errors, nothing).
> 
> any ideas on that?  have ever used it?

There are a couple of things you can try. First off, if you are using
Python 2.4, then you may be missing msvcr71.dll and/or msvcp71.dll on
the system you are trying to run on (the corresponding file(s) for
Python 2.3 and earlier are extremely common so you aren't nearly as
likely to run into this problem). Look for the line that looks like this
in the NSIS script:

    File /r '${py2exe.....

And add this line just after it (assuming you installed Python in the
default location):

    File 'C:\Python24\msvc*.*'

If you intend to distribute your result, then you can Google this group
for discussions about msvcr71.dll and license requirements for
redistribution - you won't find a definitive answer to the questions
you'll see, but you should be aware of the issues.

If that doesn't solve your problem, the next step to debugging it is to
try running the multi-file version produced by setup.py. If that doesn't
work, some common problems/workarounds can be found on the py2exe wiki.
Obviously the single file version won't work until the multi file
version works.

Chris Liechti has another solution, but the last time I checked it was
only for Python 2.3. It's on his page at:

http://homepage.hispeed.ch/py430/python/

Jimmy


From wnebfynj at mnovryyb.pbz  Thu Apr  7 07:36:51 2005
From: wnebfynj at mnovryyb.pbz (JZ)
Date: Thu, 7 Apr 2005 13:36:51 +0200
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <7a2mcsi6t3u8$.jw7lghv8brwt.dlg@40tude.net>

Dnia 5 Apr 2005 11:22:59 -0700, ChinStrap napisa?(a):

> Opinions on what the best is?

Eclipse + plugins: pydev (http://pydev.sourceforge.net/updates/) and
subclipse(http://subclipse.tigris.org/update/). It is free, stable,
contains integrated (visual) debugger, code completion, refactoring, PyLint
for deep analise of python code, and fine work with SVN.

For win32 lighter solution is PythownWin
(http://activestate.com/Products/ActivePython/). It's very stable, fast and
has very good debugger.

--
JZ


From mefjr75 at hotmail.com  Tue Apr 26 00:46:54 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 25 Apr 2005 21:46:54 -0700
Subject: Pickle an image?
In-Reply-To: <mailman.2486.1114456860.1799.python-list@python.org>
References: <mailman.2486.1114456860.1799.python-list@python.org>
Message-ID: <1114490814.513103.180490@g14g2000cwa.googlegroups.com>

GMane Python wrote:
> Hey all.
>   I have a ( list | tuple | dictionary ) with several graphics in it.
> Trying to cPickle it to a file, I get errors.  For instance,
> UnpickleableError: Cannon pickle <type 'ImagingCore'> objects.
>
>   Anyone know of a way to get around this?  I'd like to pickle a list
or
> dictionary of about 5 .JPG images.
>
> Thanks!
> Dave
Open your images in binary mode and read them in as binary strings then
save them in a list/dict/tuple , then pickle it.
>>> import Image, pickle, cStringIO
>>> i = open('c:/1.jpg', 'rb')
>>> i.seek(0)
>>> w = i.read()
>>> i.close()
>>> dic =  {'1':w,'2':w,'3':w,'4':w}
>>> p = pickle.dumps(dic)
# storage would happen at this point

Ok now you take your pickled string and unpickle your object and select
the item you want and put it in a cStringIO or StringIO so we can open
it directly with PIL.
# sometime in the future
>>> o = pickle.loads(p)
>>> one_im = o['1']
>>> c = StringIO.StringIO()
>>> c.write(one_im)
>>> c.seek(0)
>>> im = Image.open(c)
>>> im.show()

Alternatively you can create a StringIO object and pickle that in your
dictionary so you can just load it later with PIL.

Pickling will bloat the size of your file so you might want to use some
compression, although most formats will compress very little the
pickling overhead can __mostly__ be avoided.
There are boundless ways to do this and this just one of them.
hth,
M.E.Farmer



From steven.bethard at gmail.com  Thu Apr 21 11:10:49 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 21 Apr 2005 09:10:49 -0600
Subject: deprecation of has_key?
In-Reply-To: <mailman.2226.1114095804.1799.python-list@python.org>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>	<mailman.2224.1114094137.1799.python-list@python.org>	<TIKdnV6iPosyIPrfRVn-2w@comcast.com>
	<mailman.2226.1114095804.1799.python-list@python.org>
Message-ID: <dfWdnZdcUZbqX_rfRVn-vw@comcast.com>

Denis S. Otkidach wrote:
> On Thu, 21 Apr 2005 08:50:25 -0600 Steven Bethard wrote:
> 
> SB> Huh?  I'm not following your logic.  Why is "item in dict" less
> SB> readable than "dict.has_key(item)"?  Something to do with expecting
> SB> inverses that don't exist?
> SB> 
> SB> Personally, I use "item in dict" because it's quite readable to me,
> SB> and generally faster.
> 
> For me dictionary is a collection of key-value pairs, but not a
> collection of keys (that's what set is).

Ahh, ok.  Now I understand.  I think you could probably search the 
python-dev archives and see why the decision was made as it was.  For 
pretty much all my purposes, "key in dict" is much more useful than 
"item in dict".  Practicality beats Purity and all. ;)

STeVe


From iny+news at iki.fi  Fri Apr 22 00:32:03 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Fri, 22 Apr 2005 07:32:03 +0300
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
Message-ID: <m3sm1jbfek.fsf@iny.iki.fi>

James Stroud <jstroud at mbi.ucla.edu> writes:

> Is it relevant that Python can produce compiled expressions? I don't think 
> that there is such a thing with Perl.

The problem in python here is that it needs to always recompile the
regexp. I would like to have a way to write a regexp as a constant and
then python should compile that regexp to the byte-code file.

This is a problem when one has a big amount of regexps. One example is
the xmlproc parser in PyXML,

This is not a problem in a program that continues to run long times,
but I want short lived programs like command line apps.

Of course we do have ways to go around that limitation, but that is
just ugly.

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From hancock at anansispaceworks.com  Wed Apr 20 09:18:35 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 20 Apr 2005 08:18:35 -0500
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <_Lm9e.23143$Xm3.17864@trndny01>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
Message-ID: <200504200818.35304.hancock@anansispaceworks.com>

On Wednesday 20 April 2005 01:36 am, Raymond Hettinger wrote:
> <seberino at spawar.navy.mil>
> > Many people I know ask why Python does slicing the way it does.....
 [...] 
> Python's way has some useful properties:
 [...]
> OTOH, it has some aspects that bite:
 [...]
> I suspect that whether it feels natural depends on your previous background and
> whether you're working in an environment with arrays indexed from one or from
> zero.  For instance, C programmers are used to seeing code like:   for(i=0 ;
> i<n; i++) a[i]=f(i);   In contrast, a BASIC programmer may be used to FOR I = 1
> to N:  a[I]=f(I); NEXT.    Hence, the C coders may find Python's a[:n] to be
> more natural than BASIC programmers.

Well, I learned Basic, Fortran, C, Python --- more or less.  And I first found
Python's syntax confusing as it didn't follow the same rules as any of the
previous ones.

However, I used to make "off by one" errors all the time in both C and Fortran,
whereas I hardly ever make them in Python.

So I like Python's slicing because it "bites *less*" than intervals in C or Fortran.

Cheers,
Terry


--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From polykrombelcentercom  Sat Apr 30 16:45:06 2005
From: polykrombelcentercom (Zoool (at dot))
Date: Sat, 30 Apr 2005 22:45:06 +0200
Subject: [newbie] Embedding Flash OCX object
References: <xeidnY1zZ8VM5e_fRVnyuA@scarlet.biz>
	<WMMce.2066$6z3.1571@newssvr33.news.prodigy.com>
	<6ZadnfF---HWO-7fRVnyuw@scarlet.biz>
	<6URce.2055$2f2.1166@newssvr19.news.prodigy.com>
Message-ID: <sPadnTuNyPvOc-7fRVnyhg@scarlet.biz>

Thanks Kartic,

Don't know if i have understand everything, but i 'll try using your lights,

To integrate a flash movie using wx, here is a piece of code (the Flash.py 
is auto-generated by makepy.py)

### testFlash.py
from wxPython.wx import *
import os

if wxPlatform == '__WXMSW__':
	from wxPython.lib.activexwrapper import MakeActiveXClass
	#import win32com.client.gencache
	#import win32com.client
	import flash

	flashControl = flash

class FlashPanel(wxPanel):
	def __init__(self, parent, flashFile):
		wxPanel.__init__(self, parent, -1)

		sizer = wxBoxSizer(wxVERTICAL)

		ActiveXWrapper = MakeActiveXClass(flashControl.ShockwaveFlash)
		self.Flash = ActiveXWrapper( self, -1)
		self.Flash.Movie = os.path.join(os.getcwd(), flashFile)
		self.Flash.Menu=False
		self.Flash.OnFSCommand = self.OnFSCommand

		sizer.Add(self.Flash, 1, wxEXPAND)
		self.SetSizer(sizer)
		self.SetAutoLayout(True)

		EVT_WINDOW_DESTROY(self, self.OnDestroy)

	def OnDestroy(self, evt):
		if self.Flash:
			self.Flash.Cleanup()
			self.Flash = None

	def OnFSCommand(self, command, *args):

		if command=="openFile":
			self.openFile()
		if command=="saveFile":
			self.saveFile(*args)


	def openFile(self):
		dlg = wxFileDialog(self, "Choose", "", "", "*.*", wxOPEN)
		if dlg.ShowModal()==wxID_OK:
			filename = dlg.GetFilename()
			dirname = dlg.GetDirectory()
			f = open(os.path.join(dirname, filename), "r")
			self.Flash.SetVariable("PyReply", f.read())
			f.close()
		dlg.Destroy()

	def saveFile(self, text):
		dlg = wxFileDialog(self, "Save As", "", "", "*.*", 
wxSAVE|wxOVERWRITE_PROMPT)
		if dlg.ShowModal()==wxID_OK:
			filename = dlg.GetFilename()
			dirname = dlg.GetDirectory()
			f = open(os.path.join(dirname, filename), "w")
			f.write(text)
			f.close()
		dlg.Destroy()


if __name__ == '__main__':
	class FlashFrame(wxFrame):
		def __init__(self):
			wxFrame.__init__(self, None, -1, "PyFlash -- Simple File Viewer", 
size=(550, 400))
			self.flashPanel = FlashPanel(self, "testFlash.swf")

	app = wxPySimpleApp()
	frame = FlashFrame()
	frame.Show(True)
	app.MainLoop()
### Flash.py

# -*- coding: mbcs -*-
# Created by makepy.py version 0.4.8
# By python version 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit 
(Intel)]
# From type library '{D27CDB6B-AE6D-11CF-96B8-444553540000}'
# On Tue Mar 16 01:58:37 2004
"""Shockwave Flash"""
makepy_version = '0.4.8'
python_version = 0x20303f0

import win32com.client.CLSIDToClass, pythoncom
import win32com.client.util
from pywintypes import IID
from win32com.client import Dispatch

# The following 3 lines may need tweaking for the particular server
# Candidates are pythoncom.Missing and pythoncom.Empty
defaultNamedOptArg=pythoncom.Empty
defaultNamedNotOptArg=pythoncom.Empty
defaultUnnamedArg=pythoncom.Empty

CLSID = IID('{D27CDB6B-AE6D-11CF-96B8-444553540000}')
MajorVersion = 1
MinorVersion = 0
LibraryFlags = 8
LCID = 0x0

from win32com.client import DispatchBaseClass
class IShockwaveFlash(DispatchBaseClass):
	"""Shockwave Flash"""
	CLSID = IID('{D27CDB6C-AE6D-11CF-96B8-444553540000}')
	coclass_clsid = IID('{D27CDB6E-AE6D-11CF-96B8-444553540000}')

	#default_interface = IShockwaveFlash
	#default_source = _IShockwaveFlashEvents

	def Back(self):
		"""method Back"""
		return self._oleobj_.InvokeTypes(114, LCID, 1, (24, 0), (),)

	def CurrentFrame(self):
		"""method CurrentFrame"""
		return self._oleobj_.InvokeTypes(128, LCID, 1, (3, 0), (),)

	def FlashVersion(self):
		"""method FlashVersion"""
		return self._oleobj_.InvokeTypes(132, LCID, 1, (3, 0), (),)

	def Forward(self):
		"""method Forward"""
		return self._oleobj_.InvokeTypes(115, LCID, 1, (24, 0), (),)

	def FrameLoaded(self, FrameNum=defaultNamedNotOptArg):
		"""method FrameLoaded"""
		return self._oleobj_.InvokeTypes(131, LCID, 1, (11, 0), ((3, 
1),),FrameNum)

	def GetVariable(self, name=defaultNamedNotOptArg):
		"""method GetVariable"""
		# Result is a Unicode object - return as-is for this version of Python
		return self._oleobj_.InvokeTypes(152, LCID, 1, (8, 0), ((8, 1),),name)

	def GotoFrame(self, FrameNum=defaultNamedNotOptArg):
		"""method GotoFrame"""
		return self._oleobj_.InvokeTypes(127, LCID, 1, (24, 0), ((3, 
1),),FrameNum)

	def IsPlaying(self):
		"""method IsPlaying"""
		return self._oleobj_.InvokeTypes(129, LCID, 1, (11, 0), (),)

	def LoadMovie(self, layer=defaultNamedNotOptArg, 
url=defaultNamedNotOptArg):
		"""method LoadMovie"""
		return self._oleobj_.InvokeTypes(142, LCID, 1, (24, 0), ((3, 1), (8, 
1)),layer, url)

	def Pan(self, x=defaultNamedNotOptArg, y=defaultNamedNotOptArg, 
mode=defaultNamedNotOptArg):
		"""method Pan"""
		return self._oleobj_.InvokeTypes(119, LCID, 1, (24, 0), ((3, 1), (3, 1), 
(3, 1)),x, y, mode)

	def PercentLoaded(self):
		"""method PercentLoaded"""
		return self._oleobj_.InvokeTypes(130, LCID, 1, (3, 0), (),)

	def Play(self):
		"""method Play"""
		return self._oleobj_.InvokeTypes(112, LCID, 1, (24, 0), (),)

	def Rewind(self):
		"""method Rewind"""
		return self._oleobj_.InvokeTypes(116, LCID, 1, (24, 0), (),)

	def SetVariable(self, name=defaultNamedNotOptArg, 
value=defaultNamedNotOptArg):
		"""method SetVariable"""
		return self._oleobj_.InvokeTypes(151, LCID, 1, (24, 0), ((8, 1), (8, 
1)),name, value)

	def SetZoomRect(self, left=defaultNamedNotOptArg, 
top=defaultNamedNotOptArg, right=defaultNamedNotOptArg, 
bottom=defaultNamedNotOptArg):
		"""method SetZoomRect"""
		return self._oleobj_.InvokeTypes(109, LCID, 1, (24, 0), ((3, 1), (3, 1), 
(3, 1), (3, 1)),left, top, right, bottom)

	def Stop(self):
		"""method Stop"""
		return self._oleobj_.InvokeTypes(113, LCID, 1, (24, 0), (),)

	def StopPlay(self):
		"""method StopPlay"""
		return self._oleobj_.InvokeTypes(126, LCID, 1, (24, 0), (),)

	def TCallFrame(self, target=defaultNamedNotOptArg, 
FrameNum=defaultNamedNotOptArg):
		"""method TCallFrame"""
		return self._oleobj_.InvokeTypes(155, LCID, 1, (24, 0), ((8, 1), (3, 
1)),target, FrameNum)

	def TCallLabel(self, target=defaultNamedNotOptArg, 
label=defaultNamedNotOptArg):
		"""method TCallLabel"""
		return self._oleobj_.InvokeTypes(156, LCID, 1, (24, 0), ((8, 1), (8, 
1)),target, label)

	def TCurrentFrame(self, target=defaultNamedNotOptArg):
		"""method TCurrentFrame"""
		return self._oleobj_.InvokeTypes(145, LCID, 1, (3, 0), ((8, 1),),target)

	def TCurrentLabel(self, target=defaultNamedNotOptArg):
		"""method TCurrentLabel"""
		# Result is a Unicode object - return as-is for this version of Python
		return self._oleobj_.InvokeTypes(146, LCID, 1, (8, 0), ((8, 1),),target)

	def TGetProperty(self, target=defaultNamedNotOptArg, 
Property=defaultNamedNotOptArg):
		"""method TGetProperty"""
		# Result is a Unicode object - return as-is for this version of Python
		return self._oleobj_.InvokeTypes(154, LCID, 1, (8, 0), ((8, 1), (3, 
1)),target, Property)

	def TGetPropertyAsNumber(self, target=defaultNamedNotOptArg, 
Property=defaultNamedNotOptArg):
		"""method TGetPropertyAsNumber"""
		return self._oleobj_.InvokeTypes(172, LCID, 1, (5, 0), ((8, 1), (3, 
1)),target, Property)

	def TGetPropertyNum(self, target=defaultNamedNotOptArg, 
Property=defaultNamedNotOptArg):
		"""method TGetPropertyNum"""
		return self._oleobj_.InvokeTypes(158, LCID, 1, (5, 0), ((8, 1), (3, 
1)),target, Property)

	def TGotoFrame(self, target=defaultNamedNotOptArg, 
FrameNum=defaultNamedNotOptArg):
		"""method TGotoFrame"""
		return self._oleobj_.InvokeTypes(143, LCID, 1, (24, 0), ((8, 1), (3, 
1)),target, FrameNum)

	def TGotoLabel(self, target=defaultNamedNotOptArg, 
label=defaultNamedNotOptArg):
		"""method TGotoLabel"""
		return self._oleobj_.InvokeTypes(144, LCID, 1, (24, 0), ((8, 1), (8, 
1)),target, label)

	def TPlay(self, target=defaultNamedNotOptArg):
		"""method TPlay"""
		return self._oleobj_.InvokeTypes(147, LCID, 1, (24, 0), ((8, 1),),target)

	def TSetProperty(self, target=defaultNamedNotOptArg, 
Property=defaultNamedNotOptArg, value=defaultNamedNotOptArg):
		"""method TSetProperty"""
		return self._oleobj_.InvokeTypes(153, LCID, 1, (24, 0), ((8, 1), (3, 1), 
(8, 1)),target, Property, value)

	def TSetPropertyNum(self, target=defaultNamedNotOptArg, 
Property=defaultNamedNotOptArg, value=defaultNamedNotOptArg):
		"""method TSetPropertyNum"""
		return self._oleobj_.InvokeTypes(157, LCID, 1, (24, 0), ((8, 1), (3, 1), 
(5, 1)),target, Property, value)

	def TStopPlay(self, target=defaultNamedNotOptArg):
		"""method TStopPlay"""
		return self._oleobj_.InvokeTypes(148, LCID, 1, (24, 0), ((8, 1),),target)

	def Zoom(self, factor=defaultNamedNotOptArg):
		"""method Zoom"""
		return self._oleobj_.InvokeTypes(118, LCID, 1, (24, 0), ((3, 1),),factor)

	_prop_map_get_ = {
		"AlignMode": (121, 2, (3, 0), (), "AlignMode", None),
		"AllowScriptAccess": (171, 2, (8, 0), (), "AllowScriptAccess", None),
		"BGColor": (140, 2, (8, 0), (), "BGColor", None),
		"BackgroundColor": (123, 2, (3, 0), (), "BackgroundColor", None),
		"Base": (136, 2, (8, 0), (), "Base", None),
		"DeviceFont": (138, 2, (11, 0), (), "DeviceFont", None),
		"EmbedMovie": (139, 2, (11, 0), (), "EmbedMovie", None),
		"FlashVars": (170, 2, (8, 0), (), "FlashVars", None),
		"FrameNum": (107, 2, (3, 0), (), "FrameNum", None),
		"InlineData": (191, 2, (13, 0), (), "InlineData", None),
		"Loop": (106, 2, (11, 0), (), "Loop", None),
		"Menu": (135, 2, (11, 0), (), "Menu", None),
		"Movie": (102, 2, (8, 0), (), "Movie", None),
		"MovieData": (190, 2, (8, 0), (), "MovieData", None),
		"Playing": (125, 2, (11, 0), (), "Playing", None),
		"Quality": (105, 2, (3, 0), (), "Quality", None),
		"Quality2": (141, 2, (8, 0), (), "Quality2", None),
		"ReadyState": (-525, 2, (3, 0), (), "ReadyState", None),
		"SAlign": (134, 2, (8, 0), (), "SAlign", None),
		"SWRemote": (159, 2, (8, 0), (), "SWRemote", None),
		"Scale": (137, 2, (8, 0), (), "Scale", None),
		"ScaleMode": (120, 2, (3, 0), (), "ScaleMode", None),
		"SeamlessTabbing": (192, 2, (11, 0), (), "SeamlessTabbing", None),
		"TotalFrames": (124, 2, (3, 0), (), "TotalFrames", None),
		"WMode": (133, 2, (8, 0), (), "WMode", None),
	}
	_prop_map_put_ = {
		"AlignMode": ((121, LCID, 4, 0),()),
		"AllowScriptAccess": ((171, LCID, 4, 0),()),
		"BGColor": ((140, LCID, 4, 0),()),
		"BackgroundColor": ((123, LCID, 4, 0),()),
		"Base": ((136, LCID, 4, 0),()),
		"DeviceFont": ((138, LCID, 4, 0),()),
		"EmbedMovie": ((139, LCID, 4, 0),()),
		"FlashVars": ((170, LCID, 4, 0),()),
		"FrameNum": ((107, LCID, 4, 0),()),
		"InlineData": ((191, LCID, 4, 0),()),
		"Loop": ((106, LCID, 4, 0),()),
		"Menu": ((135, LCID, 4, 0),()),
		"Movie": ((102, LCID, 4, 0),()),
		"MovieData": ((190, LCID, 4, 0),()),
		"Playing": ((125, LCID, 4, 0),()),
		"Quality": ((105, LCID, 4, 0),()),
		"Quality2": ((141, LCID, 4, 0),()),
		"SAlign": ((134, LCID, 4, 0),()),
		"SWRemote": ((159, LCID, 4, 0),()),
		"Scale": ((137, LCID, 4, 0),()),
		"ScaleMode": ((120, LCID, 4, 0),()),
		"SeamlessTabbing": ((192, LCID, 4, 0),()),
		"WMode": ((133, LCID, 4, 0),()),
	}

class _IShockwaveFlashEvents:
	"""Event interface for Shockwave Flash"""
	CLSID = CLSID_Sink = IID('{D27CDB6D-AE6D-11CF-96B8-444553540000}')
	coclass_clsid = IID('{D27CDB6E-AE6D-11CF-96B8-444553540000}')
	_public_methods_ = [] # For COM Server support
	_dispid_to_func_ = {
		      150 : "OnFSCommand",
		     1958 : "OnProgress",
		     -609 : "OnReadyStateChange",
		}

	def __init__(self, oobj = None):
		if oobj is None:
			self._olecp = None
		else:
			import win32com.server.util
			from win32com.server.policy import EventHandlerPolicy
			cpc=oobj._oleobj_.QueryInterface(pythoncom.IID_IConnectionPointContainer)
			cp=cpc.FindConnectionPoint(self.CLSID_Sink)
			cookie=cp.Advise(win32com.server.util.wrap(self, 
usePolicy=EventHandlerPolicy))
			self._olecp,self._olecp_cookie = cp,cookie
	def __del__(self):
		try:
			self.close()
		except pythoncom.com_error:
			pass
	def close(self):
		if self._olecp is not None:
			cp,cookie,self._olecp,self._olecp_cookie = 
self._olecp,self._olecp_cookie,None,None
			cp.Unadvise(cookie)
	def _query_interface_(self, iid):
		import win32com.server.util
		if iid==self.CLSID_Sink: return win32com.server.util.wrap(self)

	# Event Handlers
	# If you create handlers, they should have the following prototypes:
#	def OnFSCommand(self, command=defaultNamedNotOptArg, 
args=defaultNamedNotOptArg): pass
#	def OnProgress(self, percentDone=defaultNamedNotOptArg):
#	def OnReadyStateChange(self, newState=defaultNamedNotOptArg):


from win32com.client import CoClassBaseClass
class FlashObjectInterface(CoClassBaseClass): # A CoClass
	# IFlashObjectInterface Interface
	CLSID = IID('{D27CDB71-AE6D-11CF-96B8-444553540000}')
	coclass_sources = [
	]
	coclass_interfaces = [
	]

class FlashProp(CoClassBaseClass): # A CoClass
	# Macromedia Flash Player Properties
	CLSID = IID('{1171A62F-05D2-11D1-83FC-00A0C9089C5A}')
	coclass_sources = [
	]
	coclass_interfaces = [
	]

# This CoClass is known by the name 'ShockwaveFlash.ShockwaveFlash.1'
class ShockwaveFlash(CoClassBaseClass): # A CoClass
	# Shockwave Flash
	CLSID = IID('{D27CDB6E-AE6D-11CF-96B8-444553540000}')
	coclass_sources = [
		_IShockwaveFlashEvents,
	]
	default_source = _IShockwaveFlashEvents
	coclass_interfaces = [
		IShockwaveFlash,
	]
	default_interface = IShockwaveFlash

IDispatchEx_vtables_dispatch_ = 1
IDispatchEx_vtables_ = [
	(('GetDispID', 'bstrName', 'grfdex', 'pid'), 1610743808, (1610743808, (), 
[(8, 1, None, None), (19, 1, None, None), (16387, 2, None, None)], 1, 1, 4, 
0, 28, (3, 0, None, None), 0)),
	(('RemoteInvokeEx', 'id', 'lcid', 'dwFlags', 'pdp', 'pvarRes', 'pei', 
'pspCaller', 'cvarRefArg', 'rgiRefArg', 'rgvarRefArg'), 1610743809, 
(1610743809, (), [(3, 1, None, None), (19, 1, None, None), (19, 1, None, 
None), (36, 1, None, None), (16396, 2, None, None), (36, 2, None, None), 
(13, 1, None, "IID('{6D5140C1-7436-11CE-8034-00AA006009FA}')"), (3, 1, None, 
None), (16387, 1, None, None), (16396, 3, None, None)], 1, 1, 4, 0, 32, (3, 
0, None, None), 0)),
	(('DeleteMemberByName', 'bstrName', 'grfdex'), 1610743810, (1610743810, (), 
[(8, 1, None, None), (19, 1, None, None)], 1, 1, 4, 0, 36, (3, 0, None, 
None), 0)),
	(('DeleteMemberByDispID', 'id'), 1610743811, (1610743811, (), [(3, 1, None, 
None)], 1, 1, 4, 0, 40, (3, 0, None, None), 0)),
	(('GetMemberProperties', 'id', 'grfdexFetch', 'pgrfdex'), 1610743812, 
(1610743812, (), [(3, 1, None, None), (19, 1, None, None), (16403, 2, None, 
None)], 1, 1, 4, 0, 44, (3, 0, None, None), 0)),
	(('GetMemberName', 'id', 'pbstrName'), 1610743813, (1610743813, (), [(3, 1, 
None, None), (16392, 2, None, None)], 1, 1, 4, 0, 48, (3, 0, None, None), 
0)),
	(('GetNextDispID', 'grfdex', 'id', 'pid'), 1610743814, (1610743814, (), 
[(19, 1, None, None), (3, 1, None, None), (16387, 2, None, None)], 1, 1, 4, 
0, 52, (3, 0, None, None), 0)),
	(('GetNameSpaceParent', 'ppunk'), 1610743815, (1610743815, (), [(16397, 2, 
None, None)], 1, 1, 4, 0, 56, (3, 0, None, None), 0)),
]

IFlashFactory_vtables_dispatch_ = 0
IFlashFactory_vtables_ = [
]

IFlashObjectInterface_vtables_dispatch_ = 1
IFlashObjectInterface_vtables_ = [
]

IServiceProvider_vtables_dispatch_ = 0
IServiceProvider_vtables_ = [
	(('RemoteQueryService', 'guidService', 'riid', 'ppvObject'), 1610678272, 
(1610678272, (), [(36, 1, None, None), (36, 1, None, None), (16397, 2, None, 
None)], 1, 1, 4, 0, 12, (3, 0, None, None), 0)),
]

IShockwaveFlash_vtables_dispatch_ = 1
IShockwaveFlash_vtables_ = [
	(('ReadyState', 'pVal'), -525, (-525, (), [(16387, 10, None, None)], 1, 2, 
4, 0, 28, (3, 0, None, None), 0)),
	(('TotalFrames', 'pVal'), 124, (124, (), [(16387, 10, None, None)], 1, 2, 
4, 0, 32, (3, 0, None, None), 0)),
	(('Playing', 'pVal'), 125, (125, (), [(16395, 10, None, None)], 1, 2, 4, 0, 
36, (3, 0, None, None), 0)),
	(('Playing', 'pVal'), 125, (125, (), [(11, 1, None, None)], 1, 4, 4, 0, 40, 
(3, 0, None, None), 0)),
	(('Quality', 'pVal'), 105, (105, (), [(16387, 10, None, None)], 1, 2, 4, 0, 
44, (3, 0, None, None), 0)),
	(('Quality', 'pVal'), 105, (105, (), [(3, 1, None, None)], 1, 4, 4, 0, 48, 
(3, 0, None, None), 0)),
	(('ScaleMode', 'pVal'), 120, (120, (), [(16387, 10, None, None)], 1, 2, 4, 
0, 52, (3, 0, None, None), 0)),
	(('ScaleMode', 'pVal'), 120, (120, (), [(3, 1, None, None)], 1, 4, 4, 0, 
56, (3, 0, None, None), 0)),
	(('AlignMode', 'pVal'), 121, (121, (), [(16387, 10, None, None)], 1, 2, 4, 
0, 60, (3, 0, None, None), 0)),
	(('AlignMode', 'pVal'), 121, (121, (), [(3, 1, None, None)], 1, 4, 4, 0, 
64, (3, 0, None, None), 0)),
	(('BackgroundColor', 'pVal'), 123, (123, (), [(16387, 10, None, None)], 1, 
2, 4, 0, 68, (3, 0, None, None), 0)),
	(('BackgroundColor', 'pVal'), 123, (123, (), [(3, 1, None, None)], 1, 4, 4, 
0, 72, (3, 0, None, None), 0)),
	(('Loop', 'pVal'), 106, (106, (), [(16395, 10, None, None)], 1, 2, 4, 0, 
76, (3, 0, None, None), 0)),
	(('Loop', 'pVal'), 106, (106, (), [(11, 1, None, None)], 1, 4, 4, 0, 80, 
(3, 0, None, None), 0)),
	(('Movie', 'pVal'), 102, (102, (), [(16392, 10, None, None)], 1, 2, 4, 0, 
84, (3, 0, None, None), 0)),
	(('Movie', 'pVal'), 102, (102, (), [(8, 1, None, None)], 1, 4, 4, 0, 88, 
(3, 0, None, None), 0)),
	(('FrameNum', 'pVal'), 107, (107, (), [(16387, 10, None, None)], 1, 2, 4, 
0, 92, (3, 0, None, None), 0)),
	(('FrameNum', 'pVal'), 107, (107, (), [(3, 1, None, None)], 1, 4, 4, 0, 96, 
(3, 0, None, None), 0)),
	(('SetZoomRect', 'left', 'top', 'right', 'bottom'), 109, (109, (), [(3, 1, 
None, None), (3, 1, None, None), (3, 1, None, None), (3, 1, None, None)], 1, 
1, 4, 0, 100, (3, 0, None, None), 0)),
	(('Zoom', 'factor'), 118, (118, (), [(3, 1, None, None)], 1, 1, 4, 0, 104, 
(3, 0, None, None), 0)),
	(('Pan', 'x', 'y', 'mode'), 119, (119, (), [(3, 1, None, None), (3, 1, 
None, None), (3, 1, None, None)], 1, 1, 4, 0, 108, (3, 0, None, None), 0)),
	(('Play',), 112, (112, (), [], 1, 1, 4, 0, 112, (3, 0, None, None), 0)),
	(('Stop',), 113, (113, (), [], 1, 1, 4, 0, 116, (3, 0, None, None), 0)),
	(('Back',), 114, (114, (), [], 1, 1, 4, 0, 120, (3, 0, None, None), 0)),
	(('Forward',), 115, (115, (), [], 1, 1, 4, 0, 124, (3, 0, None, None), 0)),
	(('Rewind',), 116, (116, (), [], 1, 1, 4, 0, 128, (3, 0, None, None), 0)),
	(('StopPlay',), 126, (126, (), [], 1, 1, 4, 0, 132, (3, 0, None, None), 
0)),
	(('GotoFrame', 'FrameNum'), 127, (127, (), [(3, 1, None, None)], 1, 1, 4, 
0, 136, (3, 0, None, None), 0)),
	(('CurrentFrame', 'FrameNum'), 128, (128, (), [(16387, 10, None, None)], 1, 
1, 4, 0, 140, (3, 0, None, None), 0)),
	(('IsPlaying', 'Playing'), 129, (129, (), [(16395, 10, None, None)], 1, 1, 
4, 0, 144, (3, 0, None, None), 0)),
	(('PercentLoaded', 'percent'), 130, (130, (), [(16387, 10, None, None)], 1, 
1, 4, 0, 148, (3, 0, None, None), 0)),
	(('FrameLoaded', 'FrameNum', 'loaded'), 131, (131, (), [(3, 1, None, None), 
(16395, 10, None, None)], 1, 1, 4, 0, 152, (3, 0, None, None), 0)),
	(('FlashVersion', 'version'), 132, (132, (), [(16387, 10, None, None)], 1, 
1, 4, 0, 156, (3, 0, None, None), 0)),
	(('WMode', 'pVal'), 133, (133, (), [(16392, 10, None, None)], 1, 2, 4, 0, 
160, (3, 0, None, None), 0)),
	(('WMode', 'pVal'), 133, (133, (), [(8, 1, None, None)], 1, 4, 4, 0, 164, 
(3, 0, None, None), 0)),
	(('SAlign', 'pVal'), 134, (134, (), [(16392, 10, None, None)], 1, 2, 4, 0, 
168, (3, 0, None, None), 0)),
	(('SAlign', 'pVal'), 134, (134, (), [(8, 1, None, None)], 1, 4, 4, 0, 172, 
(3, 0, None, None), 0)),
	(('Menu', 'pVal'), 135, (135, (), [(16395, 10, None, None)], 1, 2, 4, 0, 
176, (3, 0, None, None), 0)),
	(('Menu', 'pVal'), 135, (135, (), [(11, 1, None, None)], 1, 4, 4, 0, 180, 
(3, 0, None, None), 0)),
	(('Base', 'pVal'), 136, (136, (), [(16392, 10, None, None)], 1, 2, 4, 0, 
184, (3, 0, None, None), 0)),
	(('Base', 'pVal'), 136, (136, (), [(8, 1, None, None)], 1, 4, 4, 0, 188, 
(3, 0, None, None), 0)),
	(('Scale', 'pVal'), 137, (137, (), [(16392, 10, None, None)], 1, 2, 4, 0, 
192, (3, 0, None, None), 0)),
	(('Scale', 'pVal'), 137, (137, (), [(8, 1, None, None)], 1, 4, 4, 0, 196, 
(3, 0, None, None), 0)),
	(('DeviceFont', 'pVal'), 138, (138, (), [(16395, 10, None, None)], 1, 2, 4, 
0, 200, (3, 0, None, None), 0)),
	(('DeviceFont', 'pVal'), 138, (138, (), [(11, 1, None, None)], 1, 4, 4, 0, 
204, (3, 0, None, None), 0)),
	(('EmbedMovie', 'pVal'), 139, (139, (), [(16395, 10, None, None)], 1, 2, 4, 
0, 208, (3, 0, None, None), 0)),
	(('EmbedMovie', 'pVal'), 139, (139, (), [(11, 1, None, None)], 1, 4, 4, 0, 
212, (3, 0, None, None), 0)),
	(('BGColor', 'pVal'), 140, (140, (), [(16392, 10, None, None)], 1, 2, 4, 0, 
216, (3, 0, None, None), 0)),
	(('BGColor', 'pVal'), 140, (140, (), [(8, 1, None, None)], 1, 4, 4, 0, 220, 
(3, 0, None, None), 0)),
	(('Quality2', 'pVal'), 141, (141, (), [(16392, 10, None, None)], 1, 2, 4, 
0, 224, (3, 0, None, None), 0)),
	(('Quality2', 'pVal'), 141, (141, (), [(8, 1, None, None)], 1, 4, 4, 0, 
228, (3, 0, None, None), 0)),
	(('LoadMovie', 'layer', 'url'), 142, (142, (), [(3, 1, None, None), (8, 1, 
None, None)], 1, 1, 4, 0, 232, (3, 0, None, None), 0)),
	(('TGotoFrame', 'target', 'FrameNum'), 143, (143, (), [(8, 1, None, None), 
(3, 1, None, None)], 1, 1, 4, 0, 236, (3, 0, None, None), 0)),
	(('TGotoLabel', 'target', 'label'), 144, (144, (), [(8, 1, None, None), (8, 
1, None, None)], 1, 1, 4, 0, 240, (3, 0, None, None), 0)),
	(('TCurrentFrame', 'target', 'FrameNum'), 145, (145, (), [(8, 1, None, 
None), (16387, 10, None, None)], 1, 1, 4, 0, 244, (3, 0, None, None), 0)),
	(('TCurrentLabel', 'target', 'pVal'), 146, (146, (), [(8, 1, None, None), 
(16392, 10, None, None)], 1, 1, 4, 0, 248, (3, 0, None, None), 0)),
	(('TPlay', 'target'), 147, (147, (), [(8, 1, None, None)], 1, 1, 4, 0, 252, 
(3, 0, None, None), 0)),
	(('TStopPlay', 'target'), 148, (148, (), [(8, 1, None, None)], 1, 1, 4, 0, 
256, (3, 0, None, None), 0)),
	(('SetVariable', 'name', 'value'), 151, (151, (), [(8, 1, None, None), (8, 
1, None, None)], 1, 1, 4, 0, 260, (3, 0, None, None), 0)),
	(('GetVariable', 'name', 'pVal'), 152, (152, (), [(8, 1, None, None), 
(16392, 10, None, None)], 1, 1, 4, 0, 264, (3, 0, None, None), 0)),
	(('TSetProperty', 'target', 'property', 'value'), 153, (153, (), [(8, 1, 
None, None), (3, 1, None, None), (8, 1, None, None)], 1, 1, 4, 0, 268, (3, 
0, None, None), 0)),
	(('TGetProperty', 'target', 'property', 'pVal'), 154, (154, (), [(8, 1, 
None, None), (3, 1, None, None), (16392, 10, None, None)], 1, 1, 4, 0, 272, 
(3, 0, None, None), 0)),
	(('TCallFrame', 'target', 'FrameNum'), 155, (155, (), [(8, 1, None, None), 
(3, 1, None, None)], 1, 1, 4, 0, 276, (3, 0, None, None), 0)),
	(('TCallLabel', 'target', 'label'), 156, (156, (), [(8, 1, None, None), (8, 
1, None, None)], 1, 1, 4, 0, 280, (3, 0, None, None), 0)),
	(('TSetPropertyNum', 'target', 'property', 'value'), 157, (157, (), [(8, 1, 
None, None), (3, 1, None, None), (5, 1, None, None)], 1, 1, 4, 0, 284, (3, 
0, None, None), 0)),
	(('TGetPropertyNum', 'target', 'property', 'pVal'), 158, (158, (), [(8, 1, 
None, None), (3, 1, None, None), (16389, 10, None, None)], 1, 1, 4, 0, 288, 
(3, 0, None, None), 0)),
	(('TGetPropertyAsNumber', 'target', 'property', 'pVal'), 172, (172, (), 
[(8, 1, None, None), (3, 1, None, None), (16389, 10, None, None)], 1, 1, 4, 
0, 292, (3, 0, None, None), 0)),
	(('SWRemote', 'pVal'), 159, (159, (), [(16392, 10, None, None)], 1, 2, 4, 
0, 296, (3, 0, None, None), 0)),
	(('SWRemote', 'pVal'), 159, (159, (), [(8, 1, None, None)], 1, 4, 4, 0, 
300, (3, 0, None, None), 0)),
	(('FlashVars', 'pVal'), 170, (170, (), [(16392, 10, None, None)], 1, 2, 4, 
0, 304, (3, 0, None, None), 0)),
	(('FlashVars', 'pVal'), 170, (170, (), [(8, 1, None, None)], 1, 4, 4, 0, 
308, (3, 0, None, None), 0)),
	(('AllowScriptAccess', 'pVal'), 171, (171, (), [(16392, 10, None, None)], 
1, 2, 4, 0, 312, (3, 0, None, None), 0)),
	(('AllowScriptAccess', 'pVal'), 171, (171, (), [(8, 1, None, None)], 1, 4, 
4, 0, 316, (3, 0, None, None), 0)),
	(('MovieData', 'pVal'), 190, (190, (), [(16392, 10, None, None)], 1, 2, 4, 
0, 320, (3, 0, None, None), 0)),
	(('MovieData', 'pVal'), 190, (190, (), [(8, 1, None, None)], 1, 4, 4, 0, 
324, (3, 0, None, None), 0)),
	(('InlineData', 'ppIUnknown'), 191, (191, (), [(16397, 10, None, None)], 1, 
2, 4, 0, 328, (3, 0, None, None), 0)),
	(('InlineData', 'ppIUnknown'), 191, (191, (), [(13, 1, None, None)], 1, 4, 
4, 0, 332, (3, 0, None, None), 0)),
	(('SeamlessTabbing', 'pVal'), 192, (192, (), [(16395, 10, None, None)], 1, 
2, 4, 0, 336, (3, 0, None, None), 0)),
	(('SeamlessTabbing', 'pVal'), 192, (192, (), [(11, 1, None, None)], 1, 4, 
4, 0, 340, (3, 0, None, None), 0)),
]

RecordMap = {
}

CLSIDToClassMap = {
	'{D27CDB6C-AE6D-11CF-96B8-444553540000}' : IShockwaveFlash,
	'{D27CDB6D-AE6D-11CF-96B8-444553540000}' : _IShockwaveFlashEvents,
	'{D27CDB6E-AE6D-11CF-96B8-444553540000}' : ShockwaveFlash,
	'{D27CDB71-AE6D-11CF-96B8-444553540000}' : FlashObjectInterface,
	'{1171A62F-05D2-11D1-83FC-00A0C9089C5A}' : FlashProp,
}
CLSIDToPackageMap = {}
win32com.client.CLSIDToClass.RegisterCLSIDsFromDict( CLSIDToClassMap )
VTablesToPackageMap = {}
VTablesToClassMap = {
	'{D27CDB72-AE6D-11CF-96B8-444553540000}' : 'IFlashObjectInterface',
	'{D27CDB6C-AE6D-11CF-96B8-444553540000}' : 'IShockwaveFlash',
	'{A6EF9860-C720-11D0-9337-00A0C90DCAA9}' : 'IDispatchEx',
	'{D27CDB70-AE6D-11CF-96B8-444553540000}' : 'IFlashFactory',
	'{6D5140C1-7436-11CE-8034-00AA006009FA}' : 'IServiceProvider',
}


NamesToIIDMap = {
	'_IShockwaveFlashEvents' : '{D27CDB6D-AE6D-11CF-96B8-444553540000}',
	'IFlashObjectInterface' : '{D27CDB72-AE6D-11CF-96B8-444553540000}',
	'IFlashFactory' : '{D27CDB70-AE6D-11CF-96B8-444553540000}',
	'IShockwaveFlash' : '{D27CDB6C-AE6D-11CF-96B8-444553540000}',
	'IServiceProvider' : '{6D5140C1-7436-11CE-8034-00AA006009FA}',
	'IDispatchEx' : '{A6EF9860-C720-11D0-9337-00A0C90DCAA9}',
}





"Kartic" <removethis.kartic.krishnamurthy at gmail.com> a ?crit dans le message 
de news: 6URce.2055$2f2.1166 at newssvr19.news.prodigy.com...
> The Great 'Exeem' uttered these words on 4/30/2005 11:37 AM:
>> Kartic,
>>
>> Thanks for your reply,
>>
>> I already use the wxPython to embbed my flash animation
>>
>> ###
>> from wxPython.lib.activexwrapper import MakeActiveXClass
>>
>> ActiveXWrapper = MakeActiveXClass(flashActiveXLib.ShockwaveFlash, 
>> eventClass=None, eventObj=self)
>>
>> Flash = ActiveXWrapper( self, -1, style=wxSUNKEN_BORDER)
>> ####
>>
>> It work fine and i can control my flash animation from Python without 
>> problem..
>>
>> But the Wrapper need the flash.ock to be installed on the user system in 
>> order to work,
>> and i would like to make an executable application that include the 
>> flash.ocx or load it on startup for
>> users who doesn't have the flash player installed.
>> I would like also to be able to load a flash animation from memory and 
>> not to load it from external file.
>>
>> Don't know if you understand me.. Take a look at 
>> http://www.flashplayercontrol.com/ .. I'd like such a solution for 
>> Python,
>> don't know if i can use that dll from Python or make a module myself..
>>
>> Anyway, thank a lot for your interest
>>
>> Dan
>
>
> Dan,
>
> Ah! I see what you are trying to do. While I don't have a working piece of 
> code to share with you, I can give you a few ideas that you could 
> consider:
>
> 1. Supply the Macromedia OCX with your app. Try to use the wxActivex class 
> and if that fails, register your copy of the OCX. You can do this either 
> using a batch file invoking regsvr32 or use Win32 to register. The flip 
> side: The flash will be loaded from a file rather than memory.
>
> 2. Wrap the flashplayercontrol.com's DLL in an Activex control using VB 
> and distribute your OCX. And then use wxActivex to access your OCX.
>
> 3. Use SWIG to generate Python bindings for the DLL. I have never done 
> this and I am sure some of the more erudite members of the newsgroup can 
> shed some light.
>
> 4. Call the supplied DLL using Ctypes. In this case, you can convert the 
> example under the "Features" link of that site in DLL calls using Ctypes. 
> Question: How will that integrate with wx?
>
> Hope that helped a bit.
>
> Thanks,
> -Kartic 




From a.schmolck at gmx.net  Sun Apr 24 19:25:18 2005
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: Mon, 25 Apr 2005 00:25:18 +0100
Subject: How to "generalize" a function?
References: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
Message-ID: <yfs3btfahb5.fsf@black4.ex.ac.uk>

Thomas K?llmann <koellmann at gmx.net> writes:

>     confFile.close

You want ``confFile.close()`` -- the above won't do anything [1].

'as


Footnotes: 
[1]  Best practice would be something like this (don't worry to much about it
     -- it just ensures the file is properly closed, even if something goes
     wrong):

        confFile = None
        try:
            confFile = open(networkConf, 'w')
            confFile.writelines(conf)
        finally:
            if confFile: confFile.close()

    






From fuzzyman at gmail.com  Fri Apr  8 05:16:23 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Apr 2005 02:16:23 -0700
Subject: [ANN] Voidspace Pythonutils Updates
Message-ID: <mailman.1533.1112967906.1799.python-announce-list@python.org>

Lots of updates to the Voidspace modules and recipes.

Update to the Firedrop plugins see :
http://www.voidspace.org.uk/python/programs.shtml#firedrop
New version of FireSpell the spell checker (based on PyEnchant by Ryan
Kelly)
New plugin called FireMail which lets you send blog entries (or
articles) by email - either as HTML or text.
All the plugins are available for download. There is also docs on
installing and using the plugins and docs on writing plugins.

downman.py
http://www.voidspace.org.uk/python/cgi.shtml#downman
More improvements to downman.py - the simple download manager CGI
2005/03/15      Version 0.4.0
Configuration moved into external config file.
HTML stuff mmoved into downman_templates.py
Put quotes round filename (This stops firefox truncating filenames with
spaces)
Flush the output buffer as we serve the file (may help those who have
to use env in the shebang line)


guestbook.py
http://www.voidspace.org.uk/python/guestbook.html
Quite a big change - with a cleaning up of the default HTML templates
and several new features to help combat guestbook spam.

2005/04/06          Version 1.3.0
Lots of restyling in the HTML templates - not *quite* so horrible now.
We write new entries at the start of the file rather than the end
(undoes a bug introduced in 1.2.0)
Max of two URLs in an entry.
A few extra words added to the banned list. (Still trying to combat
guestbook spam)
New value 'BREAKVAL' added to templates (so we can use the XHTML <br />
if needed)
The '_charset_' field added to the form and value checked (in case page
encoding changed by guests browser)
Now use rel="nofollow" in links to foil spammers
Email addresses shown using javascript in an attempt to foil address
harvesters.
Obviously invalid email addresses and urls are removed. (very basic)


Jalopy and Login Tools
Not a huge amount of progress - but a few bugs fixed.
http://www.voidspace.org.uk/python/jalopy.html
http://www.voidspace.org.uk/python/logintools.html
2005/03/23
Admin levels are now preserved when new users are created or invited.
Corrected bug causing accounts to not be editable.
Changed all the shebang lines to '#! /usr/bin/python'
Updated to latest versions of all the pythonutils modules (like
ConfigObj)
Fixed typo in HTML for editing users (causing crashes).


cgiutils.py
http://www.voidspace.org.uk/python/recipebook.shtml#utils
cgitutils now has much better functions for handling emails.
It includes a function for creating HTML emails and a single function
will do the sending, rather than 3 functions for the three different
cases as before (using sendmail, using smtplib, using smtplib with
login).

2005/04/07      Version 0.3.0
Changed the email functions, this may break things (but it's better
this way)
Added createhtmlemail, removed loginmailme
mailme is now a wrapper for sendmailme, mailme, *and* the old
loginmailme


upload.py
http://www.voidspace.org.uk/python/cgi.shtml#upload
2005/04/07      Version 1.1.1
We now set I/O to binary mode for windows.


googleCacheServer.py
http://www.voidspace.org.uk/python/recipebook.shtml#google

An innovative use of the google api !
Version 0.1.3 5th April 2005
This is a simple implementation of a proxy server that fetches web
pages from the google cache. It's based on SimpleHTTPServer and lets
you explore the internet from your browser, using the google cache. See
the world how google sees it. Alternatively - retro internet - no CSS,
no javascript, no images, this is back to the days of MOSAIC !


Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From gandalf at geochemsource.com  Thu Apr  7 07:41:17 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 13:41:17 +0200
Subject: doubt regarding  main function
In-Reply-To: <20050407113852.51725.qmail@web8401.mail.in.yahoo.com>
References: <20050407113852.51725.qmail@web8401.mail.in.yahoo.com>
Message-ID: <42551C5D.8040706@geochemsource.com>


>if __name__ == '__main__':
>     test() 
>
>What is the advantage of this way calling a
>function.
>  
>
For example, you can have a python script that has this function:

def search(keywords,engine='www.google.com')

At the end of the script, you can have this:

if __name__ == '__main__':
     import sys	
     print search(sys.argv[1]) 


E.g. if you run the script as a program, then you can use it for 
searching and print the results.
But you can use it as a library, like

import searchengine # This won't execute the search method because 
(searchengine.__name__ == '__main__') evaluates to False

# Use the module here
results = searchengine.search('Python')

Of course this is just one possible use. For example, you can run a self 
testing function (when not used as a module).

Best,

   Laci 2.0


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From noemail at noemail.com  Tue Apr 12 17:16:04 2005
From: noemail at noemail.com (Jim)
Date: Tue, 12 Apr 2005 17:16:04 -0400
Subject: A beginer question about SOAP and Python: <SOAPpy.Types.structType
	HashStringResponse at 23909440>: {}
Message-ID: <4c-dnVn7LJL3p8HfRVn-sw@rogers.com>

Hi all,

I am new to SOAP and Python. I am practicing
learning SOAP with Python. I sent a request
and I got the following response:

<SOAPpy.Types.structType HashStringResponse
at 23909440>: {}


What does that mean? and how can I print the
result hash string ?

Please reply to the group.

Thanks for your help.
Jim.




From a at a.com  Fri Apr 22 16:36:23 2005
From: a at a.com (Non-Offensive, Professional Sounding Name)
Date: Fri, 22 Apr 2005 15:36:23 -0500
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
Message-ID: <#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>

Good gracious.  I got tired just scrolling down through that mess.

That eloquent diatribe lacks only the virtue of being true.

Oabid, you have seriously been deceived by the demon posing as the false god
Allah.

"Obaid R." <yhdanid at yahoo.com> wrote in message
news:1114127633.859113.292290 at l41g2000cwc.googlegroups.com...
> SUMMARY
> =======
>
> For the past few weeks, a self-professed
> internet evangelist has posted several times

[lies mixed with truth thankfully snipped]




From mahs at telcopartners.com  Mon Apr  4 12:44:07 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 04 Apr 2005 09:44:07 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
Message-ID: <d2rqr7$7qt$1@sea.gmane.org>

ladasky at my-deja.com wrote:
> Hi, folks,
> 
> First, the obligatory cheerleading -- then, my questions...
> 
> I love Python!  I am only an occasional programmer.  Still, the logic
> of the language is clear enough that I can retain pretty much all that
> I have learned from one infrequent programming session to the next.
> That's quite an accomplishment for a language this powerful.  Also, I'm
> finally beginning to grasp OOP.  I could never quite get the hang of it
> in C++ or Java.  Recently, I discovered __getitem__ and pickle.  Oh,
> yeah.
> 
> Anyway, my present problem is that I want to make copies of instances
> of my own custom classes.  I'm having a little trouble understanding
> the process.  Not that I think that it matters -- but in case it does,
> I'll tell you that I'm running Python 2.3.4 on a Win32 machine.
> 
> I started naively, thinking that I could just call copy.deepcopy() and
> be done with it.  After getting a TypeError from the interpreter, I
> read the deepcopy docs and discovered that I need to implement a
> __deepcopy__ method in my class.  But the docs are a bit vague here.
> What exactly should this __deepcopy__ do?  I tried looking for examples
> of __deepcopy__ code on the Net, but I'm not quite understanding what
> I'm finding there.  I guess that I'm getting deeper into the guts of
> Python than I planned.
> 
> AFAIK, I'm supposed to add a "def __deepcopy__(self, memo):" to my
> class definition.  This will get called when I invoke
> copy.deepcopy(myObject).  The object to be copied is self, I presume.
> What exactly is memo?  The docs say that it's a dictionary which "keeps
> track of what has already been copied."  Somewhere I remember reading
> that the namespace of an object is a dictionary.  So is memo identical
> to the dictionary of the new object that I'm trying to create?  What
> exactly do I add to memo?  I think that I should make shallow copies of
> methods, but deep copies of data structures (the contents of which I'm
> likely to change).  Do I iterate through and copy the items in
> dir(self)?  Do I update memo manually, or does passing memo into copy()
> or deepcopy() automatically update memo's contents?  Are there any
> items that I *shouldn't* copy from self to memo?  Should __deepcopy__
> return memo?
> 
> Sorry for all the confusion -- and thanks for your help!
> 
> --
> Rainforest laid low.
> "Wake up and smell the ozone,"
> Says man with chainsaw.
> John J. Ladasky Jr., Ph.D.
> 
If you google for:
  python __deepcopy__ cookbook
you will find a couple of examples of this method in use, among them: 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259179

class deque(object):

     def __init__(self, iterable=()):
         if not hasattr(self, 'data'):
             self.left = self.right = 0
             self.data = {}
         self.extend(iterable)

[...snip methods...]

     def __deepcopy__(self, memo={}):
         from copy import deepcopy
         result = self.__class__()
         memo[id(self)] = result
         result.__init__(deepcopy(tuple(self), memo))
         return result

HTH
Michael



From radam2 at tampabay.rr.com  Sat Apr  2 11:43:01 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 16:43:01 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
Message-ID: <6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>

On 2 Apr 2005 07:22:39 -0800, "El Pitonero" <pitonero at gmail.com>
wrote:

>Is it possible that you mistakenly believe your @decorator() is being
>executed at the line "func('Hello')"?
>
>Please add a print statement to your code:
>
>def decorator(d_arg):
>     def get_function(function):
>         print 'decorator invoked'
>         def wrapper(f_arg):
>             new_arg = f_arg+'-'+d_arg
>             result = function(new_arg)
>             return result
>         return wrapper
>     return get_function

Thanks, you are correct.  I'll post a revised dissection with print
statements documenting the flow in a few minutes.  I'm still a bit
fuzzy on how the arguments are stored and passed.  

Regards,
Ron_Adam



From garykpdx at hotmail.com  Wed Apr 20 12:18:38 2005
From: garykpdx at hotmail.com (garykpdx at hotmail.com)
Date: 20 Apr 2005 09:18:38 -0700
Subject: using locales
Message-ID: <1114013918.059442.30770@l41g2000cwc.googlegroups.com>


Is there some sort of tutorial on locales or the locale module?

I can't seem to find a list showing all possible locales. I made 'en'
work alright, but when I tried 'de' or 'de_DE' or 'es_ES', etc. it said
that those were not valid locaes. Worst of all, when I tried 'es' it
said that this was estonian?! Obviously, this is not what ISO 639 says.
'es' should be Spanish, and Estonian should be 'et.

Anyway, I'd love to have a method called get_available_locales to tell
me what I can use on my machine, or something like that.

Can anyone tell me how I *do* get these names?

Thanks



From donn at u.washington.edu  Thu Apr 28 12:14:55 2005
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 28 Apr 2005 09:14:55 -0700
Subject: mbx repair script
References: <gMUbe.2502$iZ1.2213@trnddc03>
Message-ID: <donn-0E4BE4.09145528042005@gnus01.u.washington.edu>

In article <gMUbe.2502$iZ1.2213 at trnddc03>,
 "David Isaac" <aisaac0 at verizon.net> wrote:

> I'm looking for a Python script to repair the mbx header
> for a mail file where only the header is corrupted.

"Repair" and "corrupted" covers a lot of territory.

In the simplest case, a Python script would just be
a nuisance.  All mbx files start with a 2048 byte
header, and a valid header can be copied to another
file and still be valid.  For example, if the damaged
file still has 2048 bytes of header,

   1.  Find or create another mbx file "spud".
   2.  Copy header:    $ dd if=spud count=4 > newbx
   3.  Copy old file:  $ dd if=oldbx skip=4 >> newbx
   4.  change ownership and permission to match oldbx.

This approach isn't perfect - for example, it doesn't
preserve user flag information, but then, user flags
can be messed up by common IMAP4 operations like copying
a message from one folder to another.  It assumes you
know where message data actually starts in the file,
but I think you'd need to know that in any event.

If the damage is really just that someone edited the
file in vi and you need to restore the NUL characters,
you could probably write something.  Again, you have
to be able to recognize the start of message data
(or rather, the first MBX message header line.)  If
the NULs are gone, this is probably preceded by a
series of CRLF ('\r\n'.)  Keep track of how much has
been written to the output file, and at this point,
write '\0'*(2048 - n).

   Donn Cave, donn at u.washington.edu


From mwm at mired.org  Sat Apr 30 17:40:05 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 30 Apr 2005 16:40:05 -0500
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org> <426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
Message-ID: <86pswcj64q.fsf@guru.mired.org>

Maurice LING <mauriceling at acm.org> writes:
> So if C extension API (or whatever that is really called) is stable,
> the system admin can just copy all of /sw/lib/python2.3/site-packages
> into /sw/lib/python2.4/site-packages and it should work. From what
> you've said, it seems that this isn't possible.

Correct. This isn't possible. It's not clear it's *desirable*,
either. For one thing, code can fail to port across versions, so
things will break at random (instead of all at once, I admit). For
another, I dislike the idea of a module sitting unupdate for long
periods of time (decades, say). Updating Python provides a good excuse
to update all the python modules, etc.

Now, it would be nice if Python provided an easy way to do the
update. The FreeBSD packaging system happens to provide a way to
automate this process, but it's still not exactly easy.

> So my alternative
> solution is that PyPI have a mechanism to maintain what had been
> installed in the site-package directory and to download the libraries
> and install into the new site-package directory...

PyPI is the wrong place to maintain a record of installed
software. Distutils is the software that does the installing (ok, on
most modules, anyway), and is the software that should record what
packages are installed.

Neither distutils nor PyPI has a "download" functionality. For that
matter, PyPI doesn't have a hard requirement on listing where a module
comes from. I'd say distutils is the software that should provide it,
so I can say:

   python setup.py install --depends

and get all the dependencies. But that's not at all clear. PyPI will
have to cooperate by providing URLs to packages, instead of to pages.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From jstroud at mbi.ucla.edu  Sun Apr  3 00:51:09 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 2 Apr 2005 21:51:09 -0800
Subject: Finding attributes in a list
In-Reply-To: <5e183f3d050402204426e9099f@mail.gmail.com>
References: <1112101524.879186.260630@o13g2000cwo.googlegroups.com>
	<4249f2d0.22628407@news.oz.net>
	<5e183f3d050402204426e9099f@mail.gmail.com>
Message-ID: <200504022151.09978.jstroud@mbi.ucla.edu>

On Saturday 02 April 2005 08:44 pm, Marcus Goldfish wrote:
>    (2) The Player class looks like a nice model for a data table when one
>         wants to sort by arbitrary column.  Would you agree?

The Player class is (and any class) is absolutely fabulous when you have 
heterogenous data (string, int, etc). I would not fall into the trap of LoDs 
(Lists of Dictionaries). They get unwieldy because you always have to manage 
them with functions. You end up writing a module built around your specific 
dictionary and you end up with a duct-taped object oriented design anyway. 
Classes are way better--so use them up front, even if you think that your 
data structure will never be complicated enough to warrant a class. It 
eventually will if it is worth a damn to begin with. Given this is a soccer 
team we are talking about, it is definitely worth being a full fledged class. 
However, if it were basketball...

>    (3) Suppose one wished to construct a player list...[snip]

team = [Player(azip[0],azip[1],azip[2]) for azip in zip(names,attack,defense)]


You have to love listcomp.

Better (IMHO) would be

  team = [Player(azip) for azip in zip(names,attack,defense)]

where a Player might come to life with

  class Player(object):
    def __init__(self, atup):
      self.name, self.attack, self.defense = atup

BUT, even way better (again, IMHO) would be

  ateam = Team(zip(names,attack,defense))

where team could be initialized by a tuple:

  class Team(list):
    def __init__(self, azip):
      for azip in alist:
        self.data.append(Player(atup))

James

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

http://www.jamesstroud.com/


From cjw at sympatico.ca  Fri Apr  1 17:37:37 2005
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 01 Apr 2005 17:37:37 -0500
Subject: unittest vs py.test?
In-Reply-To: <1112372685.034751.99410@o13g2000cwo.googlegroups.com>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
Message-ID: <L2k3e.23850$w63.1398227@news20.bellglobal.com>

Grig Gheorghiu wrote:
> In my mind, practicing TDD is what matters most. Which framework you
> choose is a function of your actual needs. The fact that there are 3 of
> them doesn't really bother me. I think it's better to have a choice
> from a small number of frameworks rather than have no choice or have a
> single choice that might not be the best for your specific environment
> -- provided of course that this doesn't evolve into a PyWebOff-like
> nightmare :-) 
> 
> Grig
> 
Grig,

Many thanks for your helpful essays.

unittest seems rather heavy.  I don't like mixing tests with 
documentation, it gives the whole thing a cluttered look.
Py.test is the more appealing but it doesn't appear to be
ready for packaging yet.

Thanks,

Colin W.


From fredrik at pythonware.com  Fri Apr  8 13:08:35 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 19:08:35 +0200
Subject: __iadd__ and __isub__ map to += and -= but don't return result
References: <000e01c53c4c$4c1bd280$0201a8c0@mcuf7>
Message-ID: <d36dlv$okq$1@sea.gmane.org>

Anthra Norell wrote:

> If I am missing a point here, what could it be?

the documentation?

> class Vertex (list):
>    def __init__ (self, *coordinates): self [:] = list (coordinates [0:2])
>    def __add__ (self, V):  return Vertex (self [X] + V [X], self [Y] + V [Y])
>    def __iadd__ (self, V): self [X] += V [X]; self [Y] += V [Y]

> >>> V1 += V2      # ***
> V1                # ***
>                   # *** died ?
> >>> print V1
> None              # *** V1 died !

if you leave out the return statement, Python automagically inserts a "return None"
at the end of your method.

and the __iadd__ documentation says:

    These methods are called to implement the augmented arithmetic operations
    (+=, -=, *=, /=, %=, **=, <<=, >>=, &=, ^=, |=). These methods should
    attempt to do the operation in-place (modifying self) and return the result
    (which could be, but does not have to be, self).

in other words, it works exactly as documented.  you return None, you get None.

</F> 





From peter at engcorp.com  Fri Apr  1 18:08:39 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 01 Apr 2005 18:08:39 -0500
Subject: unittest vs py.test?
In-Reply-To: <L2k3e.23850$w63.1398227@news20.bellglobal.com>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
Message-ID: <1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca>

Colin J. Williams wrote:
> unittest seems rather heavy.  I don't like mixing tests with 
> documentation, it gives the whole thing a cluttered look.

unittest can really be rather light.  Most of our
test cases are variations on the following, with
primarily application-specific code added rather than
boilerplate or other unittest-related stuff:

import unittest

class TestCase(unittest.TestCase):
     def test01(self):
         '''some test....'''
         self.assertEquals(a, b)

     def test02(self):
         '''another test'''
         self.assertRaises(Error, func, args)


if __name__ == '__main__':
     unittest.main()


That's it... add testXX() methods as required and
they will be executed in sorted order (alphabetically)
automatically when you run from the command line.
The above might look excessive in comparison to the
test code, but add some real code and the overhead
quickly dwindles to negligible.

I'm a little puzzled why folks so often consider this
particularly "heavy".  No need to deal with suites,
TestResult objects, etc, as others have suggested,
unless you are trying to extend it in some special
way.

-Peter


From python-url at phaseit.net  Mon Apr  4 13:08:02 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 04 Apr 2005 17:08:02 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr  4)
Message-ID: <d2rpfk$96s$1@lairds.us>

QOTW: "Paraphrasing Occam,  I would say 'don't multiply base classes
without necessity'. ;)" - Michele Simionato

"The world diversifies, the world congeals." - Raymond Hettinger (commenting
on the fact that py.test happily runs unittest test suites)

"I can think of no better reason for a programmer to regularly learn
languages: 'our tools warp our thinking.'  A programmer is a
professionally warped thinker." - Scott David Daniels


    Highlight of the week; Python 2.4.1 final is out:
        http://groups-beta.google.com/group/comp.lang.python.announce/msg/b82afbc729226433

    The effbot was once asked how to find an object's name:  "The same
    way as you get the name of that cat you found on your porch:  the
    cat (object) itself cannot tell you its name, and it doesn't really
    care -- so the only way to find out what it's called is to ask all
    your neighbours (namespaces) if it's their cat (object) ... and
    don't be surprised if you'll find that it's known by many names, or
    no name at all!" Duncan Booth shows us how to ask the neighbours:
        http://groups-beta.google.com/group/comp.lang.python/msg/237dc92f3629dd9a

    Ian Bicking and David Hansson talk marketing:
        http://blog.ianbicking.org/why-web-programming-matters-most.html
	http://www.loudthinking.com/arc/000432.html
    Incidentally, when will a hero(ine) emerge to do for GUI
    toolkits what the PyWebOff has started for Web frameworks?
     
    A couple of nice decorator examples this week:  Scott David Daniels
    suggests that a decorator might tidy up wxPython event handlers, and
    Oren Tirosh shows us how to hide globals from a function:
        http://groups-beta.google.com/group/comp.lang.python/msg/338134f3bd7c439c
        http://groups-beta.google.com/group/comp.lang.python/msg/d34e97cc2ae284d6
    
    Guido demonstrates multimethods, and Ian Bicking gives us an alternative
    implementation using generic functions:
        http://www.artima.com/weblogs/viewpost.jsp?thread=101605
        http://blog.ianbicking.org/more-on-multimethods.html
    
    Is Python supposed to be boring?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/ccf712755b3af3f4/437f80709adcbd86?rnum=1#ba7ad3fb3f503426
        
    Evan Jones shows us How to Use UTF-8 with Python:
        http://evanjones.ca/python-utf8.html


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From abhishek216 at yahoo.com  Tue Apr 19 07:58:18 2005
From: abhishek216 at yahoo.com (Abhishek S)
Date: Tue, 19 Apr 2005 04:58:18 -0700 (PDT)
Subject: Memory leak in python
Message-ID: <20050419115818.67408.qmail@web31708.mail.mud.yahoo.com>

Hi,

using python2.2.2

I am seeing that the python application is very slowly
eating up the memory. i need help to indentify it.

It start with 11MB and keeps growing by 1 MB around
every 30mins.

#top | grep python
10351 root      15   0 26584  25M  3896 S     0.5  0.8
 46:05   1 python2
10351 root      15   0 26592  25M  3896 S     3.5  0.8
 46:06   1 python2
10351 root      15   0 26596  25M  3896 S    30.9  0.8
 46:07   0 python2
10351 root      15   0 26608  25M  3896 S    73.0  0.8
 46:11   0 python2
10351 root      15   0 26612  25M  3896 S    73.2  0.8
 46:15   0 python2
10351 root      15   0 26616  25M  3896 S    78.6  0.8
 46:18   1 python2
10351 root      15   0 26620  25M  3896 S    78.4  0.8
 46:22   1 python2
10351 root      15   0 26620  25M  3896 S    77.4  0.8
 46:26   1 python2
10351 root      15   0 26620  25M  3896 S    73.2  0.8
 46:30   1 python2
10351 root      15   0 26620  25M  3896 S    65.8  0.8
 46:33   1 python2
10351 root      15   0 26620  25M  3896 S    43.3  0.8
 46:35   1 python2
10351 root      15   0 26620  25M  3896 S    53.8  0.8
 46:38   1 python2
10351 root      15   0 26620  25M  3896 S    26.3  0.8
 46:39   1 python2
10351 root      15   0 26636  26M  3896 S    33.5  0.8
 46:41   1 python2
10351 root      15   0 26640  26M  3896 S    25.7  0.8
 46:42   1 python2
10351 root      15   0 26656  26M  3896 S    23.9  0.8
 46:44   1 python2
10351 root      15   0 26656  26M  3896 S    11.7  0.8
 46:44   1 python2
10351 root      15   0 26660  26M  3896 S    10.7  0.8
 46:45   1 python2
10351 root      15   0 26668  26M  3896 S     3.7  0.8
 46:45   1 python2
10351 root      15   0 26668  26M  3896 S     1.7  0.8
 46:45   1 python2
10351 root      15   0 26668  26M  3896 S     0.7  0.8
 46:45   1 python2
10351 root      15   0 26668  26M  3896 S     0.3  0.8
 46:45   1 python2
10351 root      15   0 26684  26M  3896 S     4.5  0.8
 46:45   1 python2
10351 root      15   0 26688  26M  3896 S     2.1  0.8
 46:45   1 python2

let me know how to approch this.
gc.collect - does not collect anything.


Thanks,
Abhishek

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From claird at lairds.us  Thu Apr 28 11:08:06 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 28 Apr 2005 15:08:06 GMT
Subject: Getting the sender widget's name in function (Tkinter)
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
	<1114547849.644971.191270@f14g2000cwb.googlegroups.com>
	<opspvv1vyxrqur0o@eb.pragmadev>
Message-ID: <jaa7k2-ccg.ln1@lairds.us>

In article <opspvv1vyxrqur0o at eb.pragmadev>,
Eric Brunel <eric_brunel at despammed.com> wrote:
>On 26 Apr 2005 13:37:29 -0700, infidel <saint.infidel at gmail.com> wrote:
>
>> from Tkinter import Tk, Button
>>
>> def say_hello(event):
>>     print 'hello!'
>>     print event.widget['text']
>>
>> root = Tk()
>> button1 = Button(root, text='Button 1')
>> button1.bind('<Button-1>', say_hello)
>> button1.pack()
>> button2 = Button(root, text='Button 2')
>> button2.bind('<Button-1>', say_hello)
>> button2.pack()
>> root.mainloop()
>
>Unfortunately, making a binding to <Button-1> on Button widgets does not
>have the same behavior as setting their 'command' option. The binding
>will fire when the button is *pressed*; the command will be called when
>the button is *released*. So, binding to <ButtonRelease-1> instead of
><Button-1> make things a little better, but still does not have the same
>effect, since ButtonPress and ButtonRelease events are balanced: the
>widget getting the ButtonRelease event is always the same as the one
>getting the ButtonPress event. So if the mouse button is pressed inside
>the Button, then the mouse pointer goes out of it, and then the mouse
>button is released, the Button will still get the ButtonRelease event
>and fire the binding. This is not the normal behavior for a button and
>this is not the behavior you get via the 'command' option (just try
>it...).
>
>So having a different function for each button or using tiissa's
>solution is definitely better.
			.
			.
			.
Without unraveling my own confusion about who has said what to whom, does
everyone realize that Tkinter bind()ings inherently can access the widgets
which generate their events?  Please refer to Table 7-2 in <URL:
http://www.pythonware.com/library/tkinter/introduction/events-and-bindings.htm >
(and thank Fredrik, once again, for his marvelous work in putting this
material online).


From cdkrug at worldnet.att.net  Thu Apr 28 13:58:47 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Thu, 28 Apr 2005 17:58:47 GMT
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <rv9ce.663204$w62.545894@bgtnsc05-news.ops.worldnet.att.net>

On 28 Apr 2005 10:34:44 -0700, demon_slayer2839 at yahoo.com
<demon_slayer2839 at yahoo.com> wrote:
> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.
> 

"Learning Python" (Lutz/Ascher) has a good discussion of the basics.

Unfortunately, most of the OOP writings I've read fall into two
catagories:  Trivial examples where you say, "But why Bother??" and
examples that you don't understand until you've some OO design under
your belt and can understand what it's all good for.

Objects are, at the end of the day, data and the accompanying methods.
Once you've read the various tutorials take a stab at converting a
problem you know well into objects.

You'll get it wrong at first.  Most everyone does.  Don't sweat it.
Eventually, you'll just "get" it.



From jerf at jerf.org  Sat Apr 23 00:02:21 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 23 Apr 2005 00:02:21 -0400
Subject: Python Imaging Library and PyGTK - color image path?
References: <pan.2005.04.23.02.43.12.576815@jerf.org>
Message-ID: <pan.2005.04.23.04.02.21.421432@jerf.org>

On Fri, 22 Apr 2005 22:43:13 -0400, Jeremy Bowers wrote:
> (Use case, in case it matters: I am trying to embed a graphic into a text
> widget. This is going fine. Because I want the text widget to be able use
> different size text, and no one image can look right with everything from
> 8pt to 40pt text (all reasonable possibilities), I load a large image in
> from the disk and scale it down as needed; the images are designed to
> scale well and later I can make multiple source images if that is
> desirable. But I can't figure out how to get the scaled image into GTK.
> This surprises me.)

As usual, posting for help after poking around for a long while guarantees
you'll figure it out in the next few minutes. You need to create GDK
pixbufs, which can be resized and scaled and stuff.

There is definitely some room for confusion here with GTK Images, GDK
Images, GTK pixbufs, and GDK pixbufs....


From peter at engcorp.com  Wed Apr 20 11:46:34 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 11:46:34 -0400
Subject: Faster os.walk()
In-Reply-To: <mailman.2181.1114012135.1799.python-list@python.org>
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
	<mailman.2181.1114012135.1799.python-list@python.org>
Message-ID: <dqCdneACDr5-5vvfRVn-tA@powergate.ca>

Laszlo Zsolt Nagy wrote:
> fuzzylollipop wrote:
> 
>> I am trying to get the number of bytes used by files in a directory.
>> I am using a large directory ( lots of stuff checked out of multiple
>> large cvs repositories ) and there is lots of wasted time doing
>> multiple os.stat() on dirs and files from different methods.
>>  
>>
> Do you need a precise value, or are you satisfied with approximations too?
> Under which operating system? The 'du' command can be your firend.

How can "du" find the sizes without do os.stat() on each
file?


From mauriceling at acm.org  Sun Apr  3 06:21:59 2005
From: mauriceling at acm.org (Maurice Ling)
Date: Sun, 03 Apr 2005 20:21:59 +1000
Subject: text analysis in python
Message-ID: <424FC3C7.1030205@acm.org>

Hi,

I'm a postgraduate and my project deals with a fair bit of text 
analysis. I'm looking for some libraries and tools that is geared 
towards text analysis (and text engineering). So far, the most 
comprehensive toolkit in python for my purpose is NLTK (natural language 
tool kit) by Edward Loper and Steven Bird, followed by mxTextTools. Are 
there any OSS tools out there that is more comprehensive than NLTK?

In the Java world, there is GATE (general architecture for text 
engineering) and it seems very impressive. Are there something like that 
for Python?

Thanks in advance.

Cheers
Maurice


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From "Kato Dakota" at yahoo.com  Sat Apr  9 14:25:40 2005
From: "Kato Dakota" at yahoo.com (Kato Dakota)
Date: Sat, 09 Apr 2005 18:25:40 GMT
Subject: THE GREATEST NEWS EVER ! =?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
 =?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
 =?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
 =?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
 =?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
 =?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
 =?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
 =?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60_?=
 =?iso-8859-1?q?=28newsgroup-post_127=29?=
In-Reply-To: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
Message-ID: <E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>

RonGrossi_38157 at yahoo.com wrote:
> 
> The reason some people don't know for sure
> if they are going to Heaven when they die
> is because they just don't know.






> 
SATAN RULEZ!!


From martin.witte at gmail.com  Sun Apr 24 12:45:02 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 24 Apr 2005 09:45:02 -0700
Subject: optparse: store callback return value
In-Reply-To: <1114340683.593168.148310@g14g2000cwa.googlegroups.com>
References: <1114340683.593168.148310@g14g2000cwa.googlegroups.com>
Message-ID: <1114361102.007871.193580@f14g2000cwb.googlegroups.com>

Callbacks are functions called when an optparse.OptionParser() object
has a callback option defined (don't know how to say this less obvious
sounding...) (they are documented in
http://docs.python.org/lib/optparse-option-callbacks.html)

Example (based on an example in the documentation):

this script:
-#!/usr/bin/env python
-import optparse
-def record_foo_seen(option, opt_str, value, parser):
-    print 'saw foo'
-
-parser = optparse.OptionParser()
-parser.add_option("--foo", action="callback",
callback=record_foo_seen)
-(options, args) = parser.parse_args()
-
-print options, args

prints when executed with or without argument:
martin at ubuntu:~$ ./test2.py --foo
saw foo
{} []
martin at ubuntu:~$ ./test2.py
{} []
martin at ubuntu:~$



From jjl at pobox.com  Wed Apr  6 14:46:00 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Apr 2005 19:46:00 +0100
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <vf6zkal3.fsf@pobox.com>

"ChinStrap" <caneff at gmail.com> writes:

> When not using the interactive prompt, what are you using? I keep
> hearing everyone say Emacs, but I can't understand it at all. I keep
> trying to learn and understand why so many seem to like it because I
> can't understand customization even without going through a hundred
> menus that might contain the thing I am looking for (or I could go
> learn another language just to customize!).
[...]
> Opinions on what the best is? Or reading I could get to maybe sway me
> to Emacs (which has the major advantage of being on everyone's system).

Two reasons I use emacs:

1. For any question "Can I do X with emacs", the answer is almost
   always "yes, use this code that's already written and working"

2. I already know it ;-)

BTW, I use vi keybindings, and I imagine all other editors can do the
same (though perhaps not as well as viper, the emacs package that does
this -- see 1. above), so that's no reason in itself to use vim.


John



From gry at ll.mit.edu  Wed Apr  6 11:00:35 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 6 Apr 2005 08:00:35 -0700
Subject: formatting file
In-Reply-To: <mailman.1428.1112793749.1799.python-list@python.org>
References: <mailman.1428.1112793749.1799.python-list@python.org>
Message-ID: <1112799635.165142.136620@f14g2000cwb.googlegroups.com>

SPJ wrote:
> I am new to python hence posing this question.
> I have a file with the following format:
>
> test1    1.1-1   installed
> test1    1.1-1   update
> test2    2.1-1   installed
> test2    2.1-2   update
>
> I want the file to be formatted in the following way:
>
> test1    1.1-1   1.1-2
> test2    2.1-1   2.1-2

For data that has a clear tree structure with keys, a quick solution
is often a dictionary, or dictionary of dictionaries.  The setdefault
idiom below is very handy for this sort of thing.  The test name
"test1"
is key to the top dict.  The operation "update" is the key to the sub
dictionary.  Setdefault returns the dict for the specified test, or a
new dict if there is none.

.d={}
.for line in open('tests.txt'):
.    test,version,operation = l.split()
.    d.setdefault(test,{})[operation] = version

.for test,d in d.items():
.    print test, d['installed'], d['update']

[BWT, your given test data appears to have been
 wrong "test1    1.1-1   update"; please be careful not to waste
 people's time who try to help...]

-- George



From lbates at syscononline.com  Mon Apr 11 10:51:47 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 11 Apr 2005 09:51:47 -0500
Subject: My stupid newbie mistake
In-Reply-To: <k00l51dagrs1b1cq8pam1ac8vht2v6t3rp@4ax.com>
References: <k00l51dagrs1b1cq8pam1ac8vht2v6t3rp@4ax.com>
Message-ID: <Ka2dnRhGzbydEsffRVn-oQ@comcast.com>

Because Python allows you to replace built-in methods with
your own.  Later you will find that this can be extremely
powerful.  You will stumble on this if you name a list 'list'
a string 'str', integer 'int', float 'float', dictionary
'dict', ... (at least I did <grin>).

-Larry Bates

Matt Feinstein wrote:
> I named a file 'try.py' and then was stumped, for a while, when
> 
> 
>>>>import try
> 
> 
> gave a syntax error... So, how about a
> 'YouAreUsingAReservedWordStupid' exception ?
> 
> Matt Feinstein
> 
> --
> There is no virtue in believing something that can be proved to be true.


From jstroud at mbi.ucla.edu  Tue Apr 19 15:18:13 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 19 Apr 2005 12:18:13 -0700
Subject: python
In-Reply-To: <27b90ebf.0504191109.b4d8513@posting.google.com>
References: <27b90ebf.0504191109.b4d8513@posting.google.com>
Message-ID: <200504191218.13423.jstroud@mbi.ucla.edu>

python.org

On Tuesday 19 April 2005 12:09 pm, waqar wrote:
> I am new to python. I need some information on following specifically:
>
> - Background & Evolution of python
> - current application areas
> - future trend.
>
> Kindly any one provide me such information or tell websites for that
> purpose.

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

http://www.jamesstroud.com/


From roccomoretti at hotpop.com  Sun Apr 24 17:04:32 2005
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Sun, 24 Apr 2005 16:04:32 -0500
Subject: Python or PHP?
In-Reply-To: <mailman.2350.1114282904.1799.python-list@python.org>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<426A534D.1080002@mage.hu>
	<mailman.2350.1114282904.1799.python-list@python.org>
Message-ID: <d4h1l0$j4n$1@news.doit.wisc.edu>

Roman Neuhauser wrote:
> # mage at mage.hu / 2005-04-23 15:53:17 +0200:
> 
>>Lad wrote:
>>
>>
>>>Is anyone capable of providing Python advantages over PHP if there are
>>>any?

The irreverant would point you to 
http://www.python.org/doc/Humor.html#vowels

*I* wouldn't consider doing anything like that, though. <wink>

>>check this: http://wiki.w4py.org/pythonvsphp.html
> 
>     The comparison found there is biased, the author is a Python
>     partisan.
> 

Yeah, as opposed to the completely unbiased opinions the OP expected to 
find on comp.lang.PYTHON


From ptmcg at austin.rr.com  Tue Apr 26 05:56:46 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 26 Apr 2005 02:56:46 -0700
Subject: Order of elements in a dict
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <1114509406.165590.90260@o13g2000cwo.googlegroups.com>

Here is a brute-force list comprehension that does not depend on
preserving order between dict.keys() and dict.values():

dict( [ (a[1],a[0]) for a in d.items() ] )

Or for map/lambda lovers:

rev = lambda a: (a[1],a[0])
dict( map( rev, d.items() )

But you still have no control over the order returned by d.items(), so
if your initial dict has duplicate values, there is no telling which
key a duplicate would map to.

The real general-purpose dict inversion results in a dict with each
value containing a list of keys in the original dict that mapped to the
given value.  That is:
    d = {3: 4, 1: 2, 0:4}
would invert to:
    d2 = { 2:[1], 4:[0,3] }

I couldn't cram this into a list comp, so here is a short for loop to
create d2:
d2 = {}
for k,v in d.items():
    d2[v] = d2.get(v, list()) + [k]

-- Paul



From anthra.norell at tiscalinet.ch  Fri Apr  8 11:04:43 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Fri, 8 Apr 2005 17:04:43 +0200
Subject: __iadd__ and __isub__ map to += and -= but don't return result
Message-ID: <000e01c53c4c$4c1bd280$0201a8c0@mcuf7>

Hi!

If I am missing a point here, what could it be? Watch the hot spots (***)

Frederic


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


# Python 2.4, Windows ME

X = 0, Y = 1  

class Vertex (list):
   def __init__ (self, *coordinates): self [:] = list (coordinates [0:2])
   def __add__ (self, V):  return Vertex (self [X] + V [X], self [Y] + V [Y])
   def __iadd__ (self, V): self [X] += V [X]; self [Y] += V [Y]


>>> V1 = Vertex (1, 2)
>>> V2 = Vertex (4, 6)

>>> V1 + V2
[5, 8]            # OK

>>> V1 += V2      # ***
V1                # ***   
                  # *** died ?
>>> print V1
None              # *** V1 died !
>>> V2
[5, 8]            # V2 is fine

   # Adding three traces to follow the state of self

   def __iadd__ (self, V):
      print 'A', self
      self [X] += V [X]
      print 'B', self
      self [Y] += V [Y]
      print 'C', self

>>> V1 += V2
A [1, 2]
B [5, 2]
C [5, 8]          # *** self is still OK when method terminates.
                  # *** Also shows that operator += did call __iadd__, 
                  # *** (though the 2.4 doc no longer mentions it)


# Explicit call works fine

>>> V1.__iadd__ (V2)
A [1, 2]
B [5, 2]
C [5, 8]

>>> V1 
[5, 8]     <<<< OK !!!

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From dek at bosshog.lbl.gov  Mon Apr 25 10:43:27 2005
From: dek at bosshog.lbl.gov (David E. Konerding DSD staff)
Date: Mon, 25 Apr 2005 14:43:27 +0000 (UTC)
Subject: Python callbacks & PyGILState_Release()
References: <mailman.2334.1114226424.1799.python-list@python.org>
	<vf6dadh3.fsf@python.net>
	<mailman.2345.1114265296.1799.python-list@python.org>
Message-ID: <slrnd6q0gf.k9c.dek@bosshog.lbl.gov>

In article <mailman.2345.1114265296.1799.python-list at python.org>, Randall Hopper wrote:
> Thomas Heller:
> |>      Python -> C++ -> Python Callback
> |>
> |> (example attached) an exception raised in the callback doesn't make it back
> |> across C++ to Python.
> ...
> |> void callback_wrapper( void *user_data )
> |> {
> |>   // Acquire interpreter lock
> |>   PyGILState_STATE gstate = PyGILState_Ensure();
> |>   ...
> |>   // Call Python
> |>   pyresult = PyEval_CallObject( pyfunc, pyargs );
> |>   ...
> |
> |    if (pyresult == NULL)
> |        PyErr_Print();
> |
> |>   // Free interpreter lock
> |>   PyGILState_Release(gstate);
> |> }
> |
> |PyErr_Print() will do the 'right' thing?s.
> 
> Thanks for the reply.  However, this won't:
> 
>    a) Stop the main Python script, and
>    b) Print the full stack trace (including Python and C++ SWIG wrapper)
> 
> Is there a clean way to save the full exception state in the callback
> before the PyGILState_Release(), and restore it when we return across the
> C++ wrapper?
> 
> If I knew what the proper "save" and "restore" exception state code bits
> were, I could easily implement this with exception typemaps in SWIG.
> 
> Thanks,
> 
> Randall
> 
> P.S. Perhaps PyGILState_Release should take an argument instructing it to
> exclude exception state when resetting the interpreter state back to its
> original state.

Randall:

It's not the job of the PyGILState_* functions to manage exception details for you.

I always solved this problem a different way, by saving the exception in an instance variable
within the Python callback, and using a condition variable so that the main thread could abort on a callback's
failure.  Notably, our callsbacks are always invoked from a C++ thread that the main Python interepreter didn't
create, and our main Python intepreter is blocked on a mutex most of the time.

I saved the exception state by retrieveing it from sys.exc_info(), which contains all the traceback object data as Python variable.
I think you can get the same info from your C++ callback wrapper, and use PyErr_Fetch and PyErr_Restore to save and restore the
exception sate.

Dave



From duncan.booth at invalid.invalid  Mon Apr 11 04:52:41 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 Apr 2005 08:52:41 GMT
Subject: Help understanding code
References: <42591EE2.9040203@verizon.net>
	<mailman.1639.1113137111.1799.python-list@python.org>
Message-ID: <Xns96356418826A8duncanrcpcouk@127.0.0.1>

Fredrik Lundh wrote:

> Dhruva Hein wrote:
>>        results = pc()
>>                <=== what is the difference between pc and pc()?
> 
> pc refers to an object, pc() calls it.  in this case, it looks like pc is
> the
> portal catalog, and calling the catalog returns the contents.
> 
Unfortunately there is quite a bit going on behind the scenes here so if 
you don't know Plone it will be confusing:

Calling the catalog is equivalent to calling the catalog method 
searchResults. This performs a catalog search and if (as in this case) no 
other arguments are passed to it it will pick up the search parameters from 
the current REQUEST object.

Also it will add some additional search parameters: there must be a match 
between the user's allowed roles or userid and the 'allowedRolesAndUsers' 
index, and if the user doesn't have permission to access expired content, 
it will add some additional parameters to constrain the search to objects 
after their effective date and before their expired date.


<snip>
> that line is equivalent to
> 
>     temp = numbers["bytype"]
>     temp[ctype] = num

... and since temp is a constant throughout the loop it can be extracted 
from the loop and given a better name.

All of that code would have been clearer if the original author had simply 
kept a reference to the bytype and bystate dictionaries and not insisted on 
the extra level of indirection by accessing them through the numbers 
dictionary.



From jjl at pobox.com  Fri Apr 22 16:54:00 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 20:54:00 +0000
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
Message-ID: <87fyxilehj.fsf@pobox.com>

Laszlo Zsolt Nagy <gandalf at geochemsource.com> writes:

> fuzzylollipop wrote:
> 
> >try spelling license correctly next time and heading the google
> >suggestions that probably looked like "didn't you mean : Python License"
> >
> Oh yes, that was the problem. I'm not aware of that. Unfortunately,
> I'm not an American. I'm Hungarian
> and my dictionary said 'licence' is correct. But I looked at
> 'license'. It means almost the same. :-)
> 
> Is it something like 'center' or 'color' for Americans and 'centre' or
> 'colour' for British people?

Yes.  ISTR that licence is a British English spelling, though my
British brain has been thoroughly contaminated by US spellings and
usage by now.  (Or are they like practice and practise, which (can)
mean subtly different things in British English (which few native
English speakers can keep straight, certainly not me...)?)

I will never pronounce thorough 'thurrow', though.  One must draw a
line.

<wink>


John


From robin at reportlab.com  Thu Apr 28 09:22:13 2005
From: robin at reportlab.com (Robin Becker)
Date: Thu, 28 Apr 2005 14:22:13 +0100
Subject: regex over files
In-Reply-To: <17008.19697.939514.53469@montanaro.dyndns.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<17008.19697.939514.53469@montanaro.dyndns.org>
Message-ID: <4270E385.6040403@chamonix.reportlab.co.uk>

Skip Montanaro wrote:
.....


> 
> Let me return to your original problem though, doing regex operations on
> files.  I modified your two scripts slightly:
> 
.....
> Skip
I'm sure my results are dependent on something other than the coding style
I suspect file/disk cache and paging operates here. Note that we now agree on 
total match length and split count. However, when the windows VM goes into 
paging mode the mmap thing falls off the world as I would expect for a thrashing 
  system.

eg small memory (relatively)
C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=3.55

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=8.25

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=9.77

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=5.09

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=6.17

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_100mb.dat
fn=xxx_100mb.dat n=1898737 l=90506416 time=4.64

and large memory
C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=20.16

C:\code\reportlab\demos\gadflypaper>\tmp\sscan1.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=136.42

At the end of this run I had to wait quite a long time for other things to 
become responsive (ie things were entirely paged out).


Here I've implemented slightly modified versions of the scanners that you put 
forward.

eg

#sscan0.py thanks to Bengt
import sys, time, re
fn = sys.argv[1]
rxo = re.compile('XXXXX')

def frxsplit(path, rxo, chunksize=4096):
	buffer = ''
	for chunk in iter((lambda f=open(path,'rb'): f.read(chunksize)),''):
		buffer += chunk
		pieces = rxo.split(buffer)
		for piece in pieces[:-1]: yield piece
		buffer = pieces[-1]
	yield buffer
l=n=0
t0 = time.time()
for mat in frxsplit(fn,rxo):
	n += 1
	l += len(mat)
t1 = time.time()

print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))

#sscan1.py thanks to Skip
import sys, time, mmap, os, re
fn = sys.argv[1]
fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
l=n=0
t0 = time.time()
for mat in re.split("XXXXX", s):
	n += 1
	l += len(mat)
t1 = time.time()

print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))
-- 
Robin Becker



From danb_83 at yahoo.com  Wed Apr 13 11:02:12 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Apr 2005 08:02:12 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<mailman.1829.1113393406.1799.python-list@python.org>
Message-ID: <1113404532.101185.226690@g14g2000cwa.googlegroups.com>

Dick Moores wrote:
> Dan Bishop wrote at 04:07 4/13/2005:
...
> >For a floating-point number x, the representation with d "decimal"
> >places count be found by taking the representation of int(round(x *
> >radix ** d)) and inserting a "." d places from the right.
>
> But I'm sorry, but I can't follow you. I do have the first 10000 or
so
> places of pi base 10 (<http://mathwithmrherte.com/pi_digits.htm>),
but
> could you show me what to do with, say, just 3.14159?

First, decide how many "decimal" places to use for the conversion.
Five decimal digits is equivalent to 5*log(10)/log(12) = 4.63 base-12
digits, so use 4 digits.

Next, multiply by 12**4, obtaining the value 65144.01024, and round to
the nearest integer, 65144.  Convert this to base 12, obtaining 31848.
But this is 12**4 times the number we really want, so divide this by
12**4 (i.e., shift the radix point left 4 places), for a final result
of 3.1848.



From bingham at cenix-bioscience.com  Wed Apr 20 11:51:16 2005
From: bingham at cenix-bioscience.com (Aaron Bingham)
Date: Wed, 20 Apr 2005 17:51:16 +0200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <s9zu0m1mpry.fsf@thetis.intevation.de> (Bernhard Herzog's message
	of "Wed, 20 Apr 2005 17:28:01 +0200")
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<s9zu0m1mpry.fsf@thetis.intevation.de>
Message-ID: <l8ll7djvkb.fsf@lynx.cenix-bioscience.com>

Bernhard Herzog <bh at intevation.de> writes:

> There are very good reasons for half-open intervals and starting at 0
> apart from memory organization.  Dijkstra explained this quite well in
> http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF

Thanks for the excellent link!

-- 
--------------------------------------------------------------------
Aaron Bingham
Software Engineer
Cenix BioScience GmbH
--------------------------------------------------------------------



From jfj at freemail.gr  Mon Apr 25 09:30:05 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 25 Apr 2005 16:30:05 +0300
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <86hdhvotgq.fsf@guru.mired.org>
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<426CB5DC.1050301@freemail.gr>
	<mailman.2437.1114424277.1799.python-list@python.org>
	<mailman.2441.1114426201.1799.python-list@python.org>
	<86hdhvotgq.fsf@guru.mired.org>
Message-ID: <426CF0DD.5050909@freemail.gr>

Mike Meyer wrote:

> jfj <jfj at freemail.gr> writes:
> 
> 
>>I think a better question would be "What do *generator expressions* do
>>that list comprehensions don't?".  And always use list comprehensions
>>unless you want the extra bit.
> 
> 
> As the OP, I can say why I didn't ask those questions.

Sorry. I was referring to the subject line:)

> 
> Generator expressions don't build the entire list in memory before you
> have to deal with it. This makes it possible to deal with expressions
> that are to long to fit in memory.
> 
> Which means that the real rule should be always use generator
> expressions, unless you *know* the expression will always fit in
> memory.
>

Consider this code which I also included the first reply:

    x = [i for in in something()]
    random.shuffle (x)
    x.sort ()

Shuffle and sort are two examples where need *the entire list* to
work. Similarily for a dictionary where the values are small lists.
In this example using a generator buys you *nothing* because you
will immediately build a list.

So there are cases where we need the list as the product of an algorithm
and a generator is not good enough.  In fact, in my experience with 
python so far I'd say that those cases are the most common case.

That is the one question.
The other question is "why not list(generator) instead of [list 
comprehension]?"

I guess that lists are *so important* that having a primary language
feature for building them is worth it.  On the other hand "list()" is
not a primary operator of the python language. It is merely a builtin
function.


jfj



From bh at intevation.de  Wed Apr 20 11:28:01 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Wed, 20 Apr 2005 17:28:01 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
Message-ID: <s9zu0m1mpry.fsf@thetis.intevation.de>

Torsten Bronger <bronger at physik.rwth-aachen.de> writes:

> It's interesting to muse about a language that starts at "1" for all
> arrays and strings, as some more or less obsolete languages do.  I
> think this is more intuitive, since most people (including
> mathematicians) start counting at "1".  The reason for starting at
> "0" is easier memory address calculation, so nothing for really high
> level languages.

There are very good reasons for half-open intervals and starting at 0
apart from memory organization.  Dijkstra explained this quite well in
http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From news at NOwillmcguganSPAM.com  Fri Apr  8 17:16:48 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Fri, 08 Apr 2005 22:16:48 +0100
Subject: Counting iterations
In-Reply-To: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
Message-ID: <4256f4c0$0$2603$da0feed9@news.zen.co.uk>

Derek Basch wrote:
> Is there a better way to count iterations that this?:
> 
> pets = 0
> for i in pets:
>     pets += 1
>     print "pet" + "#" + pets
> 

You can use 'enumerate' to get the index, but the code above wont work - 
you are trying to iterate over a non-sequence.

Will McGugan

-- 
"".join( [ {'@':'@','.':'.'}.get(c,None) or chr(97+((ord(c)-97)+13)%26) 
for c in "jvyy at jvyyzpthtna.pbz" ] )


From phil at riverbankcomputing.co.uk  Tue Apr  5 06:43:38 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 5 Apr 2005 11:43:38 +0100 (BST)
Subject: Eric3 under WinXP
In-Reply-To: <8to45154ueb3m8gfb0sj1v3ud24j5jnm7d@4ax.com>
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
	<mailman.1366.1112689020.1799.python-list@python.org>
	<i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>
	<mailman.1370.1112692486.1799.python-list@python.org>
	<8to45154ueb3m8gfb0sj1v3ud24j5jnm7d@4ax.com>
Message-ID: <6651.82.68.80.137.1112697818.squirrel@river-bank.demon.co.uk>

> On Tue, 5 Apr 2005 10:14:48 +0100 (BST), "Phil Thompson"
> <phil at riverbankcomputing.co.uk> wrote:
>
>>> On Tue, 5 Apr 2005 09:17:05 +0100 (BST), "Phil Thompson"
>>> <phil at riverbankcomputing.co.uk> wrote:
>>>
>>> What steps are missing?
>>
>>If you are using the evaluation version of Qt then you need the
>> evaluation
>>version of PyQt. This already includes SIP and QScintilla.
>>
>>Phil
> Hello Phil,
>
> Ok, new begin.
>
> I installed PyQt 3.14.1 Evaluation now.
> If I want to start for example aclock.py, I get:
>
> ImportError: No module named qt
> Is there any dll missing?
>
> Or doesn't it fit with "Qt 3.3.4 Evaluation"
>
> Any hints?

What version of Python do you have installed? The binary is built against
v2.4.

BTW, your email address is bouncing messages.

Phil



From shane at hathawaymix.org  Fri Apr 29 22:43:53 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Fri, 29 Apr 2005 20:43:53 -0600
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <200504291940.29908.bulliver@badcomputer.org>
References: <d4u60o$akh$1@news2.netvision.net.il>	<4272C8A0.7050404@hathawaymix.org>
	<200504291940.29908.bulliver@badcomputer.org>
Message-ID: <4272F0E9.5040406@hathawaymix.org>

darren kirby wrote:
> quoth the Shane Hathaway:
> 
>>pythonchallenge wrote:
>>
>>>For the riddles' lovers among you, you are most invited to take part
>>>in the Python Challenge, the first python programming riddle on the net.
>>>
>>>You are invited to take part in it at:
>>>http://www.pythonchallenge.com
>>
>>That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
>>"temporary end".
>>
>>Shane
>>
>>P.S. I hope I didn't hammer your server on step 3.  I was missing the
>>mark. :-)
> 
> 
> You're not the only one. This is where I am currently stuck. It's starting to 
> hurt my head.
> 
> There are 478 results in the form *BBBsBBB* but the thing said 'exactly' 
> right, well there are 10 results in the form *sBBBsBBBs*
> None of them seem to work...

I did the same thing.  Now just combine those ten results.

Shane


From radam2 at tampabay.rr.com  Sun Apr  3 12:38:28 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 16:38:28 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
Message-ID: <mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>

On Sun, 03 Apr 2005 07:53:07 GMT, bokr at oz.net (Bengt Richter) wrote:


>>No, I did not know that you could pass multiple sets of arguments to

>That phraseology doesn't sound to me like your concept space is quite isomorphic
>with reality yet, sorry ;-) 

You'll be happy to know, my conceptual conceptions are conclusively
isomorphic this morning.  :-)

>It sounds like you are thinking of "multiple sets of arguments"
>as an aggregate that is passed as such, and that isn't happening, as I believe El Pitonero
>is trying to indicate with his parenthesized visualization below.

Well there are multiple sets of arguments, and there are multiple
functions involved. It's just a matter of how they get matched up.
Depending on what level you look at it, it could be both ways. But the
correct way to view it is in the context of the language it self, and
not the underlying byte code, c++ or assembly code.

>What is happening is that an expression "foo(2)(6)" is being evaluated left to right.
>First foo as a name evaluates to whatever it is bound to, which is the foo function.
>Then () is the calling operator, which says evaluate the list inside the parens left to right
>and call the thing you had so far, which was foo here. The arg list was just 2, so foo is called
>with 2, and foo returns something, with which we will do the next operation if there is one.

Like this of course:

def foo(x):
   def fee(y):
      return y*x
   return fee

statement:  z = foo(2)(6) 
becomes:    z = fee(6)
becomes:    z = 12

The position of the 'def fee' inside of 'def foo' isn't relevant, it's
only needed there so it can have access to foo's name space. It could
be at the top or bottom of the function it is in, and it wouldn't make
a difference.

This would be the same without the nesting:

def foo(xx):
    global x
    x = xx
    return fee

def fee(y):
    global x
    return y*x

z = foo(2)(6)


>So if you are seeing (2)(6) as something to pass, as opposed to a sequence of operations, I think there's
>a misconception involved. Perhaps I am taking your words askew ;-)

It's not entirely a misconception. Lets see where this goes...

> >>> dis.dis(compiler.compile('foo(2)(6)','','eval'))
>   1           0 LOAD_NAME                0 (foo)
>               3 LOAD_CONST               1 (2)
>               6 CALL_FUNCTION            1
>               9 LOAD_CONST               2 (6)
>              12 CALL_FUNCTION            1
>              15 RETURN_VALUE

In this example, you have byte code that was compiled from source
code, and then an interpreter running the byte code; which in it self,
is a program written in another language to execute the byte code,
C++; which gets translated into yet another language, assembly; which
at one time would have corresponded to specific hardwired registers
and circuits,(I could go further...ie... translators... PNP...
holes...), but with modern processors, it may yet get translated still
further.  

While all of this isn't relevant, it's knowledge in my mind, and
effects my view of programming sometimes.

Now take a look at the following descriptions of the above byte codes
from http://docs.python.org/lib/bytecodes.html


LOAD_NAME    namei
    Pushes the value associated with "co_names[namei]" onto the stack.

LOAD_CONST    consti
    Pushes "co_consts[consti]" onto the stack. 

CALL_FUNCTION    argc
    Calls a function. The low byte of argc indicates the number of
positional parameters, the high byte the number of keyword parameters.
On the stack, the opcode finds the keyword parameters first. For each
keyword argument, the value is on top of the key. Below the keyword
parameters, the positional parameters are on the stack, with the
right-most parameter on top. Below the parameters, the function object
to call is on the stack. 

RETURN_VALUE
    Returns with TOS to the caller of the function. 

*TOS = Top Of Stack.

The calling routine, puts (passes) the second set of arguments onto
the stack before calling the function returned on the stack by the
previous call.

Which is exactly how I viewed it when I referred to coming full circle
and the second sets of arguments are pass with a "stack(?)".  

Or it could be said equally the functions (objects) are passed with
the stack. So both view are correct depending on the view point that
is chosen.

Cheers,
Ron


>HTH
>
>Regards,
>Bengt Richter



From scmarsh at hotmail.com  Mon Apr 18 22:03:32 2005
From: scmarsh at hotmail.com (scott)
Date: Tue, 19 Apr 2005 02:03:32 GMT
Subject: EasyDialogs module problem with python 2.4.1
In-Reply-To: <42641956$0$21477$9b622d9e@news.freenet.de>
References: <C4S8e.1063265$Xk.1017278@pd7tw3no>
	<%fS8e.1066640$6l.831254@pd7tw2no>
	<42641956$0$21477$9b622d9e@news.freenet.de>
Message-ID: <UFZ8e.1069056$6l.754056@pd7tw2no>

Martin v. L?wis wrote:

> Try pythonw.

Thanks, that was it.

One more question, when I use the EasyDialogs module to, for example, 
display a message in a dialog box, the dialog box doesn't appear directly.
I need to switch to 'python' by clicking on it on the dock or 
alt-tabbing to 'python' in order to see the dialog box.

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

scott$ pythonw
Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import EasyDialogs
 >>> EasyDialogs.Message('hi')

(At this point the 'python' icon appears on the dock and starts jumping. 
The actual dialog box won't appear until I manually switch to python 
with alt-tab.)

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

This again is in contrast to using Pyshell, where the dialog box 
automagically appears without further user input upon entry of 
EasyDialogs.Message('hi').

Question:
Can I get this Pyshell behavior using python from the terminal?


From raghulj at gmail.com  Thu Apr  7 00:12:35 2005
From: raghulj at gmail.com (Raghul)
Date: 6 Apr 2005 21:12:35 -0700
Subject: logging as root using python script
Message-ID: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>

Hi
   Is it possible to login as a root in linux using python script?
What I need is when I execute a script it should login as root and
execute my command and logout from root to my existing account. IS is
possible?

Thanx in advance.



From rdm at rcblue.com  Wed Apr 13 20:30:54 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 17:30:54 -0700
Subject: Compute pi to base 12 using Python?
Message-ID: <6.2.1.2.2.20050413173043.070989e0@rcblue.com>

Bengt Richter wrote at 14:52 4/13/2005:
>import sys
>
>def main():
>     k, a, b, a1, b1 = 2L, 4L, 1L, 12L, 4L
>     while 1:
>         p, q, k = k*k, 2L*k+1L, k+1L
>         a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
>         d, d1 = a/b, a1/b1
>         while d == d1:
>             output(d)
>             a, a1 = 10L*(a%b), 10L*(a1%b1)
>             d, d1 = a/b, a1/b1
>
>def output(d):
>     sys.stdout.write(`int(d)`)
>     sys.stdout.flush()
>
>main()
>
># Reading/writing Python source often gives me the impression of
># reading/writing a poem!
># Layout, indentation, rythm, I like the look and feel!
>
># What does this tiny program do? It is not a sonnet, even not a
># pi-sonnet, but it surely produces Pi!

It sure does. When I ran it my jaw dropped. I had 7,947 CORRECT digits in 
2 minutes 0 seconds (by my stopwatch)!

Now on to base 12.

Thanks!

Dick Moores
rdm at rcblue.com




From fredrik at pythonware.com  Tue Apr 26 05:24:57 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 26 Apr 2005 11:24:57 +0200
Subject: Order of elements in a dict
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <d4l13f$3lo$1@sea.gmane.org>

Marcio Rosa da Silva wrote:

> In dictionaries, unlinke lists, it doesn't matter the order one inserts the contents, elements are 
> stored using its own rules.
>
> Ex:
>
> >>> d = {3: 4, 1: 2}
> >>> d
> {1: 2, 3: 4}
>
> So, my question is: if I use keys() and values() it will give me the keys and values in the same 
> order?

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

    "Keys and values are listed in an arbitrary order which is non-random,
    varies across Python implementations, and depends on the dictionary's
    history of insertions and deletions. If items(), keys(), values(), iteritems(),
    iterkeys(), and itervalues() are called with no intervening modifications
    to the dictionary, the lists will directly correspond."

</F> 





From sdementen at hotmail.com  Fri Apr  8 05:32:37 2005
From: sdementen at hotmail.com (Sébastien de Menten)
Date: Fri, 08 Apr 2005 09:32:37 +0000
Subject: args attribute of Exception objects
Message-ID: <BAY103-F240325F2A9A571969FDB0A43F0@phx.gbl>

Hi,

When I need to make sense of a python exception, I often need to parse the 
string exception in order to retrieve the data.
Example:

try:
    print foo
except NameError, e:
    print e.args
    symbol = e.args[0][17:-16]
==> ("NameError: name 'foo' is not defined", )

or

try:
    (4).foo
except NameError, e:
    print e.args
==> ("'int' object has no attribute 'foo'",)

Moreover, in the documentation about Exception, I read
"""Warning: Messages to exceptions are not part of the Python API. Their 
contents may change from one version of Python to the next without warning 
and should not be relied on by code which will run under multiple versions 
of the interpreter. """

So even args could not be relied upon !

Two questions:
  1) did I miss something in dealing with exceptions ?
  2) Could this be changed to .args more in line with:
    a) first example: e.args = ('foo', "NameError: name 'foo' is not 
defined")
    b) second example: e.args = (4, 'foo', "'int' object has no attribute 
'foo'",)
  the message of the string can even be retrieved with str(e) so it is also 
redundant.
  BTW, the Warning in the doc enables to change this :-) To be backward 
compatible, the error message could also be the first element of the tuple.

Seb

ps: There may be problems (that I am not aware) with an exception keeping 
references to other objects




From kay.schluehr at gmx.net  Sat Apr 16 12:07:09 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Apr 2005 09:07:09 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <1113667629.375491.44380@l41g2000cwc.googlegroups.com>

The idea is interesting but not unambigously realizable. Maybe one
should introduce some extra syntax for disambiguation and thereby
generalize the proposal.

as <specifier>:
   # list of definitions and assignments

Proposed specifiers are dict, tuple, *, ** and func.


-  as dict:

   conversion into a dictionary

   Example:

   d = as dict:
       doc = "I'm the 'x' property."
       def fget(self):
           return self.__x

   We would get d = {"doc":"I'm the 'x' property.", "fget":fget}


-  as **:

   conversion into keyword-arguments. This comes close in spirit to the
   original proposal

   Example:

   x = property():
       as **:
           doc = "I'm the 'x' property."
           def fget(self):
               return self.__x

-  as tuple:

   conversion into a tuple. Preserving order.

   Example:

   t = as tuple:
           doc = "I'm the 'x' property."
           def fget(self):
               return self.__x
   >>> t[1]
   <function fget at 0x00EC4770>


-  as *:

   conversion into an argument tuple. Preserving order.

   Example:

   x = property():
       as *:
           def get_x():
               return self.__x
           def set_x(value):
               self.__x = value
           del_x = None
           doc   = "I'm the 'x' property."



-  as func(*args,**kw):

   Anoymus functions. Replacement for lambda. Support for
   arbirtray statements?

   Examples:

   p = as func(x,y): x+y
   p(1,2)

   i,j = 3,4
   if (as func(x,y): x+y) (i,j) > 10:
      print True


Ciao,
Kay



From jelleferinga at gmail.com  Fri Apr 29 11:56:11 2005
From: jelleferinga at gmail.com (jelle)
Date: 29 Apr 2005 08:56:11 -0700
Subject: how to pass an array to a VB array via COM
In-Reply-To: <mailman.2586.1114617817.1799.python-list@python.org>
References: <mailman.2586.1114617817.1799.python-list@python.org>
Message-ID: <1114790171.348692.50240@l41g2000cwc.googlegroups.com>

Hi Stefan,

Thanks for your insightful and in-depth response!
Wonderful to hear that a solution is in the works, that's absolutely
wonderful news.
If I can help you out beta-testing the PySafeArray implementation, I'd
be delighted to do so. Thanks again, Jelle.



From cesarbs at gmail.com  Thu Apr 14 10:02:26 2005
From: cesarbs at gmail.com (=?ISO-8859-1?Q?C=E9sar_Leonardo_Blum_Silveira?=)
Date: Thu, 14 Apr 2005 11:02:26 -0300
Subject: A little request about spam
In-Reply-To: <d3fd636605041405592212edf8@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
Message-ID: <e724b24405041407021decd1c4@mail.gmail.com>

Yeah that is happening to me too! Almost all my python-list e-mails go
to the Spam box.
Maybe we should contact the gmail admins?



On 4/14/05, mark hellewell <mark.hellewell at gmail.com> wrote:
> On 4/14/05, James <spiralx at gmail.com> wrote:
> > Yes - it's been like that for the last month or so now and it's quite
> > annoying, especially seeing as before it was working at near enough
> > 100% accuracy.
> 
> And I don't suppose there's much we can do about it?
> 
> mark
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From richardblackwood at cloudthunder.com  Sun Apr 24 00:02:55 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 00:02:55 -0400
Subject: Variables
In-Reply-To: <d4f4ps$7cu$1@sea.gmane.org>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b0d03_3@newspeer2.tds.net>	<426B1300.6090802@cloudthunder.com>
	<d4f4ps$7cu$1@sea.gmane.org>
Message-ID: <426B1A6F.2060401@cloudthunder.com>

Robert Kern wrote:

> Richard Blackwood wrote:
>
>> Kent Johnson wrote:
>>
>>> Richard Blackwood wrote:
>>>
>>>>>> To All:
>>>>>>
>>>>>>    Folks, I need your help. I have a friend who claims that if I 
>>>>>> write:
>>>>>>
>>>>>> foo = 5
>>>>>>
>>>>>> then foo is NOT a variable, necessarily. 
>>>>>
>>>>>
>>>>>
>>>>>
>>>> Indeed, this language is math. My friend says that foo is a 
>>>> constant and necessarily not a variable. 
>>>
>>>
>>>
>>>
>>> Well, we mostly talk Python here, not math. In Python, if you say
>>> foo = 5
>>> foo is a name bound to an immutable value.
>>>
>>> If I had written foo = raw_input(), he would
>>>
>>>> say that foo is a variable. 
>>>
>>>
>>>
>>>
>>> That's funny. foo is still a name bound to an immutable (string) 
>>> value. foo is no more or less variable than it was with foo = 5.
>>>
>>> Which is perfectly fine except that he
>>>
>>>> insists that since programming came from math, the concept of 
>>>> variable is necessarily the identical. This can not be true. For 
>>>> example, I may define foo as being a dictionary, but I can not do 
>>>> this within math because there is no concept of dictionaries within 
>>>> mathematics; yet foo is a variable, a name bound to a value which 
>>>> can change.
>>>
>>>
>>>
>>>
>>> Sounds like you are having a stupid and meaningless argument with 
>>> your friend. What you call foo won't change what it is. He should 
>>> learn Python, then he would understand the true zen of foo.
>>
>>
>>
>> That is exactly how I feel about it. Foo is what it is. Variable, 
>> name bound to immutable value, etc., what we call it doesn't really 
>> change how I program, only how I communicate with other programmers 
>> (and mathematicians). Is the notion of variable not a fundamental 
>> concept in programming?  Surely there must be an unambiguous 
>> definition I can relay to him.
>
>
> Why should there be? Different programming languages have different 
> models. In C, a variable corresponds to a memory slot. In Python, it's 
> a just a name that can be bound to an object.
>
> If you must, http://en.wikipedia.org/wiki/Variable
>
Fantastic, wikipedia deals precisely with the difference between 
variables in mathematics versus programming. However, he would never 
trust a definition from such an "unreputable" source. If you have any 
other sources I might direct him to...he maintains that the notion of 
foo being a variable where it's value is known (versus unknown) is 
illogical.


From bokr at oz.net  Sat Apr 16 23:24:50 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 03:24:50 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<1113667629.375491.44380@l41g2000cwc.googlegroups.com>
	<42618007.117284766@news.oz.net>
Message-ID: <4261d351.138606786@news.oz.net>

On Sun, 17 Apr 2005 01:10:47 GMT, bokr at oz.net (Bengt Richter) wrote:
[...]
>
>The "::" expression I'm proposing generalizes capturing suite bindings into an ordered sequence of (key,value)
>tuples, like an ordered vars().items() limited to the bindings produced in the suite following "::"
>Thus
>    items = ::
>        x = 1
>        y = [1,2]
>        def foo():pass
>
>    print items => (('x', 1), ('y', [1, 2]), ('foo', <function foo at 0x02EE8D14>))
>
Update, sorry. Galloping evolution here ;-)

The '::' unary suite operator should return an ordered dict subtype representing the bindings, so

     print items => {'x':1, 'y':[1, 2], 'foo':<function foo at 0x02EE8D14>}

instead. This allows cleaner suite-based keyword calling, since no dict(::<suite>) is necessary,

so
     def foo(**kw): print kw

followed by

     foo(**::
         x = 1
         y = [1,2]
         def foo():pass)

will print the same. Since ::<suite> is an expression, it can go anywhere an expression can go.
I like orthogonality ;-)

Methods allow (with order preserved from binding in suite)

    (:: x=1; y=2).keys()   # => ['x', 'y']
and
    (:: x=1; y=2).values() # => [1, 2]
and
    (:: x=1; y=2).items()  # => [('x', 1), ('y', 2)]

note that :: is ;-greedy in one-line suites, so
   :: x=1; y=2
is not
   (:: x=1); y=2

Regards,
Bengt Richter


From bogus@does.not.exist.com  Wed Apr  6 10:45:02 2005
From: bogus@does.not.exist.com ()
Date: Wed, 06 Apr 2005 14:45:02 -0000
Subject: (no subject)
Message-ID: <mailman.26.1572215757.3356.python-list@python.org>

#! rnews 4875
Newsgroups: comp.lang.python
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From: Harry George <harry.g.george at boeing.com>
Subject: Re: Best editor?
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
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References: <1112725379.514651.66540 at l41g2000cwc.googlegroups.com>
Mime-Version: 1.0
Date: Wed, 6 Apr 2005 14:22:57 GMT
Xref: news.xs4all.nl comp.lang.python:371122

"ChinStrap" <caneff at gmail.com> writes:

> When not using the interactive prompt, what are you using? I keep
> hearing everyone say Emacs, but I can't understand it at all. I keep
> trying to learn and understand why so many seem to like it because I
> can't understand customization even without going through a hundred
> menus that might contain the thing I am looking for (or I could go
> learn another language just to customize!).
> 
> Personally I like SciTE, it has everything I think a midweight editor
> should: code folding, proper python support, nice colors out of the
> box, hotkey access to compile (I'm sure emacs does this, but I couldn't
> figure out for the life of me how), etc.
> 
> Opinions on what the best is? Or reading I could get to maybe sway me
> to Emacs (which has the major advantage of being on everyone's system).
> 

The key (as others have said) is to know your editor and be effective
with it.  As long as it can handle ASCII, does autoindent, and knows
tab-is-4-chars, then it is a viable choice.

Since you asked specifically about emacs, and whether or not it is
worthwhile...

I've used emacs for 15 years, and am still learning useful new tricks
at a rate of about one per 6 months.  But I've also found that the
essentials can be taught in a 2 hour session and mastered in about 2
weeks of use.  I've taught dozens of people using this "Essential
Emacs" approach.  

We find that emacs is for people who will be doing serious editing all
day long (e.g., programmers).  I like that comment from another
poster: "Emacs is a good place to live, but I wouldn't want to visit
there."

For people who will just be editing an occassional file (and no python
code), we recommend notepad or nedit.

Now then, how do we use emacs?

1. Proper setup is essential.  Assuming you have python-mode.el and
.elc in emacs's program-modes dir, then your .emacs needs:

;---python---------------------------
(load "python-mode")
(setq auto-mode-alist
      (cons '("\\.py$" . python-mode) auto-mode-alist))
(setq interpreter-mode-alist
      (cons '("python" . python-mode)
            interpreter-mode-alist))
(autoload 'python-mode "python-mode" "Python editing mode." t)
(add-hook 'python-mode-hook 'turn-on-font-lock)
(setq python-mode-hook 'python-initialise)
(defun python-initialise ()
  (interactive)
  (setq default-tab-width 4)
  (setq indent-tabs-mode nil)
)


2. I almost never use the interactive prompt.  There are people here
who do, but as soon as the script is more than a couple lines long, it
takes longer to reenter the code (even copy-and-paste) than to
edit-save-run a dummy batch script.  When I'm doing Extreme
Programming with such people, I insist on using a stopwatch and
checking which approach is more efficient -- they usually come over to
my approach.

3. I run emacs with split windows:
a) Edit the working code
b) Edit the unittest code
c) Run a shell script, where I (re)run the "go_test" script by doing
alt-p ret

In another frame (same emacs process, different frame) I keep the
oracle (known good) and test outputs in split windows, and maybe do
ediff-buffers on them if the deltas are not obvious.   

For each module under consideration (view or edit), I use a separate
emacs process in a similar manner.  In normal work, that means 1-4
emacs processes running, each with its own shell and own test cycles.

4. Elsewhere I'm running emacs rmail all day, and run emacs gnus several
times a day (like now).

5. When I do Extreme Programming, the other author(s) tend to be using
emacs, vim, or nedit.  We don't let people use notepad for python
becuause it doesn't know proper formatting.  IDE's tend to want to own
the whole show, which makes cross-tool Extreme Programming a pain.

As long as the other programmers have set their editors for
auto-indention and tab-is-4-chars, then we get along fine.  [I do
notice a sizeable delay when vim people search for the appropriate
shell windows, instead of having them in a (joined-at-the-hip) split
window.  This has more to do with bookkeeping than with editors per
se, but it is a data point.]

6. On IDE's and code-completion: If you are going to be typing the
same thing over and over, why not use a function, or maybe code
generation?

-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From mkashkin at gmail.com  Thu Apr 28 17:02:27 2005
From: mkashkin at gmail.com (Mikhail 'Xen' Kashkin)
Date: 28 Apr 2005 14:02:27 -0700
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
Message-ID: <1114722147.505877.286950@o13g2000cwo.googlegroups.com>

If you use ssh, then you must to learn 'scp'. Or buy books about
programming ;)



From donn at drizzle.com  Sat Apr 30 12:18:49 2005
From: donn at drizzle.com (Donn Cave)
Date: Sat, 30 Apr 2005 16:18:49 -0000
Subject: mbx repair script: Python vs perl
References: None <EyNce.1037$nN.378@trnddc05>
Message-ID: <1114877929.236697@yasure>

Quoth "David Isaac" <aisaac0 at verizon.net>:
| I'm looking for the Python equivalent of the perl script and module
| described at
| http://comments.gmane.org/gmane.mail.imap.uw.c-client/707
|
| Any hope?

Sure, should be doable, if for some reason you can't just use that.
I personally wouldn't do it exactly that way, rather I would just
read the file directly.

At first you said you were only interested in fixing the header.
This one operates on the rest of the file, and I guess I will assume
that's what you really want.  MBX structure is just a one line message
header before each message, with a message size value among other things.
Readers of this format will add that size value to the current file
offset and expect another header line at that point.  When the data
there isn't a valid header line, they die.  One does not need the
c-client library to do this, but more to the point it isn't what you
want to do, with a damaged file.

Just read the file from one end to the other and find everything that
looks like a header line, and then rewrite the file with adjusted header
lines required so that

- they are in ascending order by ID number
- they have correct sizes.

	Donn Cave, donn at drizzle.com


From tim at tt1lock.org  Sat Apr  9 11:57:15 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Sat, 9 Apr 2005 15:57:15 GMT
Subject: Are circular dependencies possible in Python?
Message-ID: <IEosBE.GtB@bath.ac.uk>

Like C, Python seems to insist I declare functions before calling
them - rather than, say, scanning to the end of the current script
when it can't immediately find what function I'm referring to.

C lets you predeclare functions to allow for the existence of
functions with circular dependencies.

Does Python allow you to do something similar?

If not how do you create functions with circular dependencies in
Python - where function A could call function B; and function
B could call function A - or is that not possible?
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From irmen.NOSPAM at xs4all.nl  Sun Apr 24 10:08:08 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 24 Apr 2005 16:08:08 +0200
Subject: thread lock object.
In-Reply-To: <1114347545.147038.265210@g14g2000cwa.googlegroups.com>
References: <1114347545.147038.265210@g14g2000cwa.googlegroups.com>
Message-ID: <426ba849$0$166$e4fe514c@news.xs4all.nl>

ajikoe at gmail.com wrote:
> Hello,
> 
> I have multi thread program running together and each will increment
> int i.
> 
> How can we make only one thread at a time be able to access and
> increment i ?
> 
> Thanks in advance,
> 
> Sincerely Yours,
> pujo
> 

Use a synchronization primitive such as a lock
(threading.Lock, threading.RLock)

But for simply incrementing a number (i+=1) this is not needed
because that operation cannot be interrupted by another thread,
as far as I know.

--Irmen



From kirk at jobsluder.net  Sun Apr 24 14:05:30 2005
From: kirk at jobsluder.net (Kirk Job Sluder)
Date: Sun, 24 Apr 2005 18:05:30 GMT
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net>
	<mailman.2379.1114319143.1799.python-list@python.org>
Message-ID: <878y389hi1.fsf@debian.kirkjobsluder.is-a-geek.net>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:

> Bengt Richter wrote:
> 
> >Tell him in Python foo is a member of one set and 5 is a member of another,
> >and foo = 5 expresses the step of putting them into correspondence
> >to define a mapping, not declaring them equal.
> >
> Could I honestly argue this to him? From what basis do I argue that it
> is not an equation? In any event, he would likely (passionately)
> disagree considering his notion that programming is an off-shoot of
> math and thus at the fundamental level has identical concepts and
> rules. Believe it or not, he used to be a programmer. Back in the day
> (while I was getting my PhD in philosophy), he was a employed
> programmer using Cobol, Fortran, and other languages like that. Did
> his seemingly peculiar definition of variable exist at that time?

Because, this is shorthand that operates at quite a bit of a higher
level than the mathematical roots of a programming language.  Here is a
peek of what is going in when foo = 5 is evaluated.

create an anonymous int object
set the value of that object to 5 
create a symbol foo 
bind the location the anonymous object to symbol foo






> 
> >Even in math notation, ISTM important to distinguish between
> >a finger and what it may for the moment be pointing at.
> >
> >Regards,
> >Bengt Richter
> >
> 

-- 
Kirk Job-Sluder
"The square-jawed homunculi of Tommy Hilfinger ads make every day an
existential holocaust."  --Scary Go Round


From mauriceling at acm.org  Fri Apr 29 20:17:21 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sat, 30 Apr 2005 10:17:21 +1000
Subject: New Python website
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
	<42719DFF.5080504@acm.org>
	<1114781419.288939.30840@z14g2000cwz.googlegroups.com>
Message-ID: <4272CE91.5080908@acm.org>

lpe wrote:
> Hi maurice
> thanks for your interest, that surely looks interesting (and promising)
> I had no experience with any of the packages you mentioned, but it may
> well be usefull.
> Please email me with more details of what you had in mind.
> 

Hi,

I've just read PEP 262 last night and finds that it does more or less 
describes what I have in mind. However, I am not sure if there is every 
need for such a descriptive database file or something slimmer, like 
Fink's .info files will suffice.

An example of Fink's .info file is:
====================================================
Package: g77
Version: 3.4.1
Revision: 1
BuildDependsOnly: true
Source: mirror:gnu:gcc/gcc-%v/gcc-%v.tar.bz2
Source-MD5: 31b459062499f9f68d451db9cbf3205c
NoSourceDirectory: True
ConfigureParams: --enable-languages=f77 --infodir='${prefix}/share/info' 
--libexecdir='${prefix}/lib' --disable-shared
#BuildDepends: dejagnu
PatchScript: <<
  #!/bin/sh
  cd gcc-%v/gcc
  mv Makefile.in Makefile.in.orig
  sed 's|$(ALL_CPPFLAGS) $(INCLUDES)|$(INCLUDES) $(ALL_CPPFLAGS)|g' < 
Makefile.in.orig > Makefile.in
<<
CompileScript: <<
  #!/bin/sh
  mkdir darwin
  cd darwin
  ../gcc-%v/configure %c
  make CFLAGS='-O' LIBCFLAGS='-g -O2' LIBCXXFLAGS='-g -O2 
-fno-implicit-templates' profiledbootstrap
#cd gcc; make check-g77
<<
InstallScript: <<
  #!/bin/sh
  cd darwin
  make install prefix=%i
  cd %i/bin
  /bin/rm -f gcc gccbug cpp gcov powerpc-apple*
  ln -s %p/bin/g77 f77
  darwinvers=`/usr/bin/uname -v | cut -f1 -d":" | awk '{print $4}'`
  gccvers=`%i/bin/g77 -dumpversion | head -1 | cut -f4 -d" "`
  ln -s 
%p/lib/gcc/powerpc-apple-darwin${darwinvers}/${gccvers}/include/g2c.h 
%i/include/g2c.h
  /bin/rm -rf %i/share/locale %i/man
  /bin/rm -f %i/lib/charset.alias
  /bin/rm -f %i/share/info/gcc* %i/share/info/cpp*
  /bin/mv -f %i/lib/libiberty.a %i/lib/libiberty-g77.a
<<
License: GPL
DocFiles: gcc-%v/gcc/f/ChangeLog gcc-%v/COPYING gcc-%v/COPYING.LIB
Description: GNU Fortran compiler
DescDetail: <<
  g77 consists of several components:

  1) The g77 command itself.
  2) The libg2c run-time library.  This library contains the
     machine code needed to support capabilities of the Fortran
     language that are not directly provided by the machine code
     generated by the g77 compilation phase.
  3) The compiler itself, internally named f771.
     f771 does not generate machine code directly --
     it generates assembly code, leaving the conversion to
     actual machine code to an assembler, usually named as.

  g77 supports some fortran90 features, like automatic arrays,
  free source form, and DO WHILE.
<<
DescPort: <<
  Installs g77 from the FSF gcc distribution.

  This version does not install in /usr. It contains it's own cc1 and
  libgcc.a installed in %p.

  libiberty.a moved to libiberty-g77.a to avoid conflict with ddd.
<<
DescUsage: <<
  If you get unresolved symbol '_saveFP', add -lcc_dynamic when linking.

  Does not support -framework argument, to link frameworks use -Wl flag
  (for example, to link vecLib use "-Wl,-framework -Wl,vecLib").

  No man page, use "info g77".
<<
Homepage: http://gcc.gnu.org/onlinedocs/g77/
Maintainer: Jeffrey Whitaker <jswhit at fastmail.fm>
================================================================================

Implementing the API specified in PEP 262 is desirable.

What I am thinking is this,

1. when user specify a package to install, the package's .info file will 
be looked up in 'pkginfo' directory (in PEP 262, it is the INSTALLDB 
directory that holds all these .info files).

2. to the system, only 3 things are crucial: where to get the package? 
what packages the package needs? how to install? These 3 things are the 
real critical parts of .info file, the rest are information and metadata.

3. from the dependencies, the system now creates a tree of dependencies. 
Can all dependencies be satisfied, i.e. are there any required packages 
that are not in standard library and there is no .info file for?

4. dependencies are satisfied (install the packages) from terminal leaf 
nodes on the dependency tree to the root node (which is the one the user 
wants to install)

5. appropriate entries are made in appropriate files (i.e. 
pkg-install.log) to signify which packages are installed.

6. satisfy the files needed for API requirements of PEP 262.

Please tell me what you think...


Cheers
Maurice


From bokr at oz.net  Sun Apr 10 08:47:02 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 10 Apr 2005 12:47:02 GMT
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
	<mailman.1596.1113015264.1799.python-list@python.org>
	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>
	<mailman.1607.1113039130.1799.python-list@python.org>
	<1113043759.765568.9920@o13g2000cwo.googlegroups.com>
Message-ID: <425919b6.16894062@news.oz.net>

On 9 Apr 2005 03:49:19 -0700, "George Sakkis" <gsakkis at rutgers.edu> wrote:

>"Michael Spencer" <mahs at telcopartners.com> wrote:
>>
>> George,
>>
>> since you explicit allowed metaprogramming hacks :-), how about
>something like
>> this (not tested beyond what you see):
>>
>> [snipped]
>>
>
>Nice try, but ideally all boilerplate classes would rather be avoided
>(at least being written explicitly). Also, it is not obvious in your
>solution why and which placeholder classes have to be written (like
>World2.Movable) and which do not. By the way, my current working
>solution involves copying and pasting verbatim these classes :-) Below
>is an abstracted example; note that the 'declaration string' of each
>original class is exactly the same across all different versions after
>the first (e.g. "class B(PreviousNamespace.B, A)").
>
>
>#======================================================
># version_1.py
>
>class Namespace:
>    class A(object):
>        def foo(self): return "version_1.foo()"
>    class B(A):
>        def bar(self): return "version_1.bar()"
>    class C(B):
>        def zen(self): return "version_1.zen()"
>#======================================================
># version_2.py
>
>from version_1 import Namespace as PreviousNamespace
>class Namespace(PreviousNamespace):
>    class A(PreviousNamespace.A):
>        def foo(self): return "version_2.foo()"
>    class B(PreviousNamespace.B, A):
>        pass
>    class C(PreviousNamespace.C, B):
>        pass
>#======================================================
># version_3.py
>
>from version_2 import Namespace as PreviousNamespace
>class Namespace(PreviousNamespace):
>    class A(PreviousNamespace.A):
>        pass
>    class B(PreviousNamespace.B, A):
>        def bar(self): return "version_3.bar()"
>    class C(PreviousNamespace.C, B):
>        pass
>
>#======================================================
># test.py
># command: python test.py <#version>
>
>def NamespaceFactory(version):
>    return __import__("version_%d" % version).Namespace
>
>print NamespaceFactory(2).B().foo() # "version_2.foo()"
>print NamespaceFactory(3).C().bar() # "version_3.bar()"
>
>import sys, inspect
>namespace = NamespaceFactory(int(sys.argv[1]))
># print the __mro__ of each 'inner' class
>for name,cls in inspect.getmembers(namespace,
>                                   inspect.isclass):
>    print cls
>    for ancestor in cls.__mro__:
>        print "\t", ancestor
>
>#======================================================
>
See if this does what you want:
(Note that vermeta.py preliminarily writes out the three version_?.py files, so
you can just go to a temp directory and run python24 vermeta.py)

It makes the version files look a little more cluttered with the
open(..).write('''\ ... ''') wrapping. E.g., 2 & 3 are just


----< version_2.py >-----------
from version_1 import Namespace as PreviousNamespace
class Namespace(PreviousNamespace):
    __metaclass__ = vars(PreviousNamespace)['__metaclass__']
    
    class A:
        def foo(self): return "version_2.foo()"
-------------------------------

and 

----< version_3.py >-----------
from version_2 import Namespace as PreviousNamespace
class Namespace(PreviousNamespace):
    __metaclass__ = vars(PreviousNamespace)['__metaclass__']
    
    class B:
        def bar(self): return "version_3.bar()"
-------------------------------

And you only have to change one digit in the 3-line boilerplate
and your class definitions don't have to specify inheritance,
but it could test for type classobj (classic class) and only
redefine if so ;-)

There are some limitations I think (;-) but the idea is you just have to
specify  three lines of boilerplate for a new version, and then just
the classes and methods you are interested in overriding in the new
version, and you don't have to specify the class inheritance in the new versions,
as the lazystyle metaclass function takes care of that. I hope ;-)
Version_1 has to be hand made, but after that, see what you think.

----< vermeta.py >---------------------------------------------------------------
#======================================================
# version_1.py
open('version_1.py','w').write('''\
NAMESPACE_CLASSNAMES = ['A', 'B', 'C']
def metadeco(nsname, nsbases, nsdict):
#    print '--- metadeco ---', nsbases, nsdict['__module__'], __name__
#    print 'nsname  = %r\\nnsbases = %r\\nnsdict  = %s' %(
#        nsname, nsbases, ',\\n    '.join(str(nsdict).split(', ')))
    if nsdict['__module__'] != __name__:  # exclude this first-version module
#        print '--- doing meta stuff for namespace of module %s ---'% nsdict['__module__']
        for i, cname in enumerate(NAMESPACE_CLASSNAMES):
            cbases = (vars(nsbases[0])[cname],) + (i and (nsdict[NAMESPACE_CLASSNAMES[i-1]],) or ())
            if object not in cbases: cbases += (object,)
            if cname in nsdict:
                cdict = nsdict[cname].__dict__.copy()
                #cdict['__module__'] = __name__
            else:
                cdict = {'__doc__': '(Generated by version_1.metadeco)'}
            cdict['__module__'] = nsdict['__module__']
            nsdict[cname] = type(cname, cbases, cdict)
    return type(nsname, nsbases, nsdict)
    
class Namespace(object):
    __metaclass__ = metadeco
    class A(object):
        def foo(self): return "version_1.foo()"
    class B(A):
        def bar(self): return "version_1.bar()"
    class C(B):
        def zen(self): return "version_1.zen()"
''')

#======================================================
# version_2.py
open('version_2.py','w').write('''\
from version_1 import Namespace as PreviousNamespace
class Namespace(PreviousNamespace):
    __metaclass__ = vars(PreviousNamespace)['__metaclass__']
    
    class A:
        def foo(self): return "version_2.foo()"
''')
#======================================================
# version_3.py
open('version_3.py','w').write('''\
from version_2 import Namespace as PreviousNamespace
class Namespace(PreviousNamespace):
    __metaclass__ = vars(PreviousNamespace)['__metaclass__']
    
    class B:
        def bar(self): return "version_3.bar()"
''')

#======================================================
# test.py
# command: python test.py <#version>

def NamespaceFactory(version):
    return __import__("version_%d" % version).Namespace

print NamespaceFactory(2).B().foo() # "version_2.foo()"
print NamespaceFactory(3).C().bar() # "version_3.bar()"

import sys, inspect
namespace = NamespaceFactory(int(sys.argv[1]))
# print the __mro__ of each 'inner' class
for name,cls in inspect.getmembers(namespace,
                                   inspect.isclass):
#for name, cls in (t for t in namespace.__dict__.items() if isinstance(t[1], type)):
    print cls
    for ancestor in cls.__mro__:
        print "\t", ancestor

#======================================================
---------------------------------------------------------------------------------

Run:

[ 5:33] C:\pywk\clp\sakkis\meta>py24 vermeta.py 3
version_2.foo()
version_3.bar()
<class 'version_3.A'>
        <class 'version_3.A'>
        <class 'version_2.A'>
        <class 'version_1.A'>
        <type 'object'>
<class 'version_3.B'>
        <class 'version_3.B'>
        <class 'version_2.B'>
        <class 'version_1.B'>
        <class 'version_3.A'>
        <class 'version_2.A'>
        <class 'version_1.A'>
        <type 'object'>
<class 'version_3.C'>
        <class 'version_3.C'>
        <class 'version_2.C'>
        <class 'version_1.C'>
        <class 'version_3.B'>
        <class 'version_2.B'>
        <class 'version_1.B'>
        <class 'version_3.A'>
        <class 'version_2.A'>
        <class 'version_1.A'>
        <type 'object'>
<type 'type'>
        <type 'type'>
        <type 'object'>

Regards,
Bengt Richter


From michele.simionato at gmail.com  Thu Apr 28 09:29:25 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 28 Apr 2005 06:29:25 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1114686654.011511.306570@l41g2000cwc.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
	<1114587592.260950.181990@l41g2000cwc.googlegroups.com>
	<1114587846.011299.125420@g14g2000cwa.googlegroups.com>
	<1114663336.926935.97910@f14g2000cwb.googlegroups.com>
	<1114665613.879362.75100@l41g2000cwc.googlegroups.com>
	<1114686654.011511.306570@l41g2000cwc.googlegroups.com>
Message-ID: <1114694965.800390.101160@o13g2000cwo.googlegroups.com>

<talking about programming in the large and in the small>

Well, let me specialize my sentence

> CherryPy and Quixote are for programming in the small

in

> CherryPy and Quixote are good for programming in the small

meaning that these frameworks help you when programming in the small.
This statement does NOT imply that they get in your way when you
program
in the large. I just lack the experience in programming in the large
with
CherryPy and/or Quixote.

Also, let me specify what I mean by "programming in the large":
if a single person can grasp the application, and the application
can be implemented by a single team, then you are programming
in the small.

You are programming in the large only when you have many independent
team of developers and you have coordination problems. In this
situation
a component architecture is supposed to help (and maybe it does, I lack

the field experience to give an opinion), whereas when working in the
small a component architecture can just get in your way.

It is easy to evaluate a framework in the small: it is enough
to ask to self the question "how much time did it take to me to write
my first Web site in that framework starting from zero?". OTOH, to
evaluate a framework for programming in the large takes years of
experience and practice, and I will not hazard any opinion ;)

Still, I believe it is possible to have a frameworks which is
scalable both in the small and in the large. Look for instance
at the programming language spectrum: Java was intended to program
in the large and it is pretty bad when programming in the small;
Perl, on the other hand, was meant to program in the small and does
not scale at all in the large. However, Python works equally well
both in the large and in the small. So, I think there is no
contraddiction between large and small, in theory. But in practice
there is, so I use Zope at work and Quixote at home ;)


                Michele Simionato



From gandalf at geochemsource.com  Thu Apr  7 15:11:53 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 21:11:53 +0200
Subject: import statement - package visibility problem
In-Reply-To: <8cf2994e.0504071024.69de669f@posting.google.com>
References: <mailman.1478.1112870310.1799.python-list@python.org>
	<8cf2994e.0504071024.69de669f@posting.google.com>
Message-ID: <425585F9.8050806@geochemsource.com>

Paul Clinch wrote:

>>    
>>
>I get:
>  
>
>>>>import Lib
>>>>        
>>>>
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>ImportError: No module named Lib
>
>I guess there's a Lib/__init__.py.
>  
>
You are totally right. I was trying to create an example but Python 
found something on my PYTHONPATH.
Sorry for the confusion, I sent a bad example. Well, could not be so bad 
because you understood the point.
I'll try to create a new good example today and make it available.

>But onto the point you're making. I think its possibly a mis-viewing
>of the package idea in Python. A package creates a name space. If you
>create Lib/Server/Db with all the __init__.py files, its because you
>want to import Lib.Server.Db,  rather than a way of organising your
>source files.
>  
>
I agree. Sometimes I need to import Lib.Server.Db but sometimes I need 
to import Lib.Server.Db.Adapters.PostgreSQLConnection.
Importing from a not package related source code is not a problem, 
really. My problem is about importing inside a package.

Lib/Server/Db/__init__.py __can__  import Lib/Server/Db/Adapters usign 
relative paths, but

Lib/Server/Db/Adapters/PostgreSQLConnection.py  __cannot__  import from 
Lib/Server/Db using relative paths

Of course I can do the latter import using absolute paths but that is 
something I would like to avoid. In other words:
it is possible to import using relative lib paths only in one direction. 
Why is that? Why can't I import something
"from the containing package"?

Why I would like to do that? Please see my reasons in my original 
e-mail. If you think that I want a programatically
bad thing, please tell me what is the right way to do it. I'm sorry if I 
look demanding.  I'm open to any suggestions.
I can hardly find a design problem in the language itself, I believe 
these problems are just mine. I have a bug in my
mind. :-) Please help me to catch it.

>If you want to have a single name space, and keep the nested
>arrangement of directories, you can add python code in Lib/__init__.py
>to traverse directories and import packages that you find. 
>
Ok, in the example, you will see that this is not possible. I'm going to 
upload it soon.

>Or you can define any rules for mapping files and directories to the name space
>you desire.
>  
>
How to do that? By hacking?


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From jaywgraves at gmail.com  Thu Apr 21 11:36:09 2005
From: jaywgraves at gmail.com (jay graves)
Date: 21 Apr 2005 08:36:09 -0700
Subject: recording data between [ and ]
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
Message-ID: <1114097769.446445.70210@g14g2000cwa.googlegroups.com>

I haven't used either of these tools but they might help a little.

http://lfw.org/python/rxb15.py
http://pyparsing.sourceforge.net/

If you want to help building traditional regex patterns, I find
programs like these to be invaluable.

Tools/scripts/redemo.py in the python standard lib.
http://kodos.sourceforge.net/home.html
http://weitz.de/regex-coach/

HTH,
jay graves



From kay.schluehr at gmx.net  Mon Apr 25 18:50:28 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 25 Apr 2005 15:50:28 -0700
Subject: Injecting code into a function
In-Reply-To: <1114457804.600476.324860@o13g2000cwo.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
	<1114457804.600476.324860@o13g2000cwo.googlegroups.com>
Message-ID: <1114469428.476290.315110@f14g2000cwb.googlegroups.com>

George Sakkis wrote:

> Thanks, that's the closest to what I wanted. A minor point I didn't
> quite get from the documentation is how to set a local trace instead
of
> a global (sys) trace.

You never do. "Local" in this context only means that those local trace
functions are called inside the one global trace-function and return
the global trace function again.

In Lonnies example there are no local-trace functions at all.

> Also, there's no sys.gettrace() to return the
> current tracer; is there a way around this ?

The default tracer is None i.e. no debugging. The programmer has to
control his tracer which might not be to hard:


class Analyzer:
    def trace_returns(self, frame, event, arg):
        if event == 'return':
            self.func_locals = frame.f_locals
        return self.trace_returns

    def analyzeLocals(self, func,*args,**kw):
        sys.settrace(self.trace_returns)
        func(*args,**kw)
        sys.settrace(None)

Ciao,
Kay



From nikolai.kirsebom.NOJUNK at siemens.no  Mon Apr  4 10:58:40 2005
From: nikolai.kirsebom.NOJUNK at siemens.no (Nikolai Kirsebom)
Date: Mon, 04 Apr 2005 16:58:40 +0200
Subject: adodbapi return value
References: <ume251pif5d6jieb945ajo3ruohrt5e7p0@4ax.com>
Message-ID: <u6l251le80d6svom6g12o398e12s1nbv51@4ax.com>

Found out what's wrong.  The "Output Parameter Availablity" property
of the connection has the value DBPROPVAL_OA_ATROWRELEASE.  By closing
the record set (reading out the result set first) the output
parameters were correct.  Made the modification directly in the
executeHelper method of the Cursor object.  Changed at the end of the
method;

        if isStoredProcedureCall and parameters != None:
            return self._returnADOCommandParameters(self.cmd)

to

        if isStoredProcedureCall and parameters != None:
            x = self.fetchall()
            rs.Close()
            return self._returnADOCommandParameters(self.cmd), x

Guess this is not the right way.  Any comments appreciated.
Nikolai Kirsebom



From peter at engcorp.com  Fri Apr  1 16:14:53 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 01 Apr 2005 16:14:53 -0500
Subject: Who said that? (was Re: string goes away)
In-Reply-To: <mailman.1207.1112387569.1799.python-list@python.org>
References: <20050401113753.2hhq78s8z7nocwoo@mcherm.com>
	<mailman.1207.1112387569.1799.python-list@python.org>
Message-ID: <cNOdnbCdn-W0J9DfRVn-rQ@powergate.ca>

Ivan Van Laningham wrote:
> Tim Peters sayeth, "Premature Optimization is the Root of All Evil." 
> And he is not kidding.

And just to forestall another long thread about who
actually said that originally, it was really Mark
Twain, quoting Churchill.  Tim just added a <wink>.

-Peter


From beliavsky at aol.com  Mon Apr  4 14:40:31 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 4 Apr 2005 11:40:31 -0700
Subject: Symbol Referencing Error in Fortran 90
References: <1112635719.898929.108060@o13g2000cwo.googlegroups.com>
Message-ID: <1112640031.432645.32970@l41g2000cwc.googlegroups.com>

This message was also posted and replied to on comp.lang.fortran -- I
think it's presence here is an accident.



From tzot at sil-tec.gr  Thu Apr 14 11:43:55 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 14 Apr 2005 18:43:55 +0300
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com><425e47a9$0$26352$db0fefd9@news.zen.co.uk><mailman.1886.1113479564.1799.python-list@python.org>
	<v4vs51hm5d0jailbuif4m34hjfjoh9028a@4ax.com>
	<mailman.1901.1113489586.1799.python-list@python.org>
Message-ID: <ts3t51duq0geqtag9fvg0j6i0sdql371h7@4ax.com>

On Thu, 14 Apr 2005 16:35:59 +0200, rumours say that "Fredrik Lundh"
<fredrik at pythonware.com> might have written:

>> [0] -- btw, in your code, Fredrik:
>> """file = open(keycode + ".out", "wb")""".replace("keycode", "filename")
>
>if you do that, decompression won't work.

How obvious, now that you mention it... :)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From vinay_sajip at yahoo.co.uk  Fri Apr 29 13:39:11 2005
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Fri, 29 Apr 2005 17:39:11 +0000 (UTC)
Subject: logging problems
References: <loom.20050428T142438-258@post.gmane.org>
Message-ID: <loom.20050429T193718-936@post.gmane.org>

Simon Dahlbacka <simon.dahlbacka <at> gmail.com> writes:

This is a known problem, and a patch was put into CVS. I would suggest that you
either check out the version from CVS, or move the "import traceback" to the top
of the module.

The problem is caused by a threading deadlock which occurs when an importer
tries to log a message.

Regards,


Vinay Sajip





From tiissa at nonfree.fr  Tue Apr 26 16:19:12 2005
From: tiissa at nonfree.fr (tiissa)
Date: Tue, 26 Apr 2005 22:19:12 +0200
Subject: Getting the sender widget's name in function (Tkinter)
In-Reply-To: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
Message-ID: <426ea23e$0$12335$626a14ce@news.free.fr>

Harlin Seritt wrote:
> I have the following script. Two widgets call the same function. How
> can I tell inside of the called function which button called it?:

As far as I know you can't (but I can be proven wrong).
You may try to define a class to solve this (not tested):

####
class say_hello:
     def __init__(self, text):
         self.text=text
     def __call__(self)
         print 'Hello!'
         print self.text

root = Tk()
button1 = Button(root, text='Button 1', command=say_hello('Button 1'))
button1.pack()
button2 = Button(root, text='Button 2', command=say_hello('Button 2'))
button2.pack()
root.mainloop()
####


From bill.mill at gmail.com  Mon Apr 25 14:10:28 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Mon, 25 Apr 2005 14:10:28 -0400
Subject: What is situation with threads in Python
In-Reply-To: <426D2D11.3020905@jpl.nasa.gov>
References: <426D2D11.3020905@jpl.nasa.gov>
Message-ID: <797fe3d4050425111074475da6@mail.gmail.com>

On 4/25/05, Leonard J. Reder <reder at jpl.nasa.gov> wrote:
> Hello Mark,
> 
> I took your three day course here at JPL and recall that you said
> something was wrong with the implementation of threads within Python
> but I cannot recall what.  So what is wrong with threads in Python?

I'm going to guess that he meant the Global Interpreter Lock is what's
wrong with Python threads. You can read about it in the docs at
http://docs.python.org/api/threads.html and get some good analysis
from Ian Bicking (with some excellent, and some not so excellent,
comments): http://blog.ianbicking.org/gil-of-doom.html .

> 
> The other part of this question is, if there is something wrong with
> the threads in Python has anyone wrapped the Posix threads C api using
> swig to fix this problem?  I work on Solaris/Linux systems and this
> seems like a quick fix - maybe.
> 

Nope, since the interpreter is not entirely thread-safe, I don't
believe you can wrap pthreads.

> Enjoyed the class a great deal.  I am also sending this to the news
> group in hopes of various interesting replies.  Maybe there is a web
> article on this topic already that someone could send the URL.
> 
> Thanks for all replies,
> 
> Len
> --
> ____________________________________________________
> Leonard J. Reder
> Jet Propulsion Laboratory
> Interferometry Systems and Technology Section 383
> Email: reder at huey.jpl.nasa.gov
> Phone (Voice): 818-354-3639
> Phone (FAX): 818-354-4357
> Mail Address:
> Mail Stop: 171-113
> 4800 Oak Grove Dr.
> Pasadena, CA. 91109
> ---------------------------------------------------
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From danb_83 at yahoo.com  Thu Apr 21 14:47:01 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 21 Apr 2005 11:47:01 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <1114109221.149346.64850@z14g2000cwz.googlegroups.com>

Antoon Pardon wrote:
> Op 2005-04-21, Steve Holden schreef <steve at holdenweb.com>:
> > beliavsky at aol.com wrote:
...
> >> Along the same lines, I think the REQUIREMENT that x[0] rather
than
> >> x[1] be the first element of list x is a mistake. At least the
> >> programmer should have a choice, as in Fortran or VBA. In C
starting at
> >> 0 may be justified because of the connection between array
subscripting
> >> and pointer arithmetic, but Python is a higher-level language
where
> >> such considerations are less relevant.
> >>
> > But Pythonicity required that there should be one obvious way to do

> > something. How obvious is having two ways?
>
> How obvious is that lists can be any length? Do you consider it
> an unbounded number of ways, that lists can be any length?
>
> Like users have a choice in how long they make a list, they
> should have a choice where the indexes start. (And that
> shouldn't be limited to 0 and 1).

Suppose you could.  Then what should

([3, 1, 4] indexbase 0) + ([1, 5, 9] indexbase 4)

equal?

> That you are forced to use zero-based structures, while the
> problem space you are working on uses one-based structures
> is a far bigger stumbling block where you continually have
> to be aware that the indexes in your program are one off
> from the indexes the problem is expressed in.

Name a problem space that inherently requires arrays to be 1-based
rather than 0-based.



From deetsNOSPAM at web.de  Tue Apr 12 07:54:07 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 12 Apr 2005 13:54:07 +0200
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1747.1113304220.1799.python-list@python.org>
Message-ID: <d3gcso$jue$00$1@news.t-online.com>

> Can we paypal you a hundred dollars to leave us alone?  I'll pledge $10.
> Are there another nine people here who'll do the same?

Me, me. I'm good for ten, too. The current euro-dollar exchange course makes
that the price of a normal size McDonalds Menu - so sparing that makes me
healthier both mentally and physically. Great deal.
-- 
Regards,

Diez B. Roggisch


From sjmachin at lexicon.net  Wed Apr  6 18:44:01 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 07 Apr 2005 08:44:01 +1000
Subject: number conversion
References: <1112810997.893405.58560@g14g2000cwa.googlegroups.com>
Message-ID: <31n851tsdqsul60ongetv7guqvu1aj7d69@4ax.com>

On 6 Apr 2005 12:01:23 -0700, nicksjacobson at yahoo.com wrote:

>I'm writing a program to read in raw data from a WAV file, and write it
>to an IT file.  I got this to work in C by reading the data into an
>array of unsigned chars called "RawDataAry", then converted it to
>signed chars by doing the following:

It might help us help you if you explained why you think you need to
do this. An example or two might help: "I have these bytes in a WAV
file \xf0\x0b\xaa etc etc and I need to transform them into <whatever>
to write them to an IT file". Alternatively, "bytes in a WAV file
represent integers in range(A,B); bytes in an IT file represent
integers in range(C,D); I need to ...".

>
>signed char *CharAry = malloc(sizeof(signed char) * frames);
>for (i = 0; i < input_frames; i++)
>    CharAry[i] = (signed char)(((signed short)WavDataAry[i]) - 128);

WavDataAry or RawDataAry ??? Let's assume for the moment that they are
synonyms :-)

(1) raw is in an unsigned char, 0 <= raw <= 255
(2) casting that to a signed short gives you an I-don't-know-what
without some thought & flicking through K&R -- let's assume still 0 to
255
(3) subtracting 128 gives you -128 to +127
(4) which then gets cast as a signed char ....

Somehow I think your bit patterns have survived intact. 

May I ask a quick silly question: why don't you read it into an array
of signed chars in the first place??

Without further information, it appears that you want to travel from
New York City, NY to "The Big Apple", but you are diverting past Walla
Walla, WA.

>
>It worked.
>
>
>But when I tried to do this kind of conversion in Python, I got an
>OverflowError exception.
>
>First I read the data into an array of unsigned chars:
>
>fmt = str(chunklen) + 'B'
>fmtsize = struct.calcsize(fmt)
>rawdata = struct.unpack(fmt, s[:fmtsize])
>rawdata = list(rawdata)
>
>Then I tried to convert it:
>
>charary = array.array('b')
>charary.fromlist(rawdata)
>
>This last line threw the OverflowError exception, "OverflowError:
>signed char is greater than maximum."

That would be because you omitted one step in emulating your C antics:
subtracting 128.

>
>Is there a way to do this?? 

We're still not sure what "this" is.

> Thanks a lot in advance!!
>
>--Nick



From martin at v.loewis.de  Mon Apr 18 13:32:09 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 18 Apr 2005 19:32:09 +0200
Subject: compiling python 2.4.1 on Linux_X86_64 using PGI compiler fails
In-Reply-To: <sezmvwb8gu.fsf@pc047299.dhcp.germanlloyd.org>
References: <sezmvwb8gu.fsf@pc047299.dhcp.germanlloyd.org>
Message-ID: <4263EF19.9090804@v.loewis.de>

Berthold H?llmann wrote:
> Has anyone compiled python successfully using PGI compilers under 64
> bit Linux. If yes, what are the neccesarry switches?

As a starting point, I would try to compile without optimization.

If the compiler has something similar to gcc's -fno-strict-aliasing,
you should pass that as well.

Regards,
Martin


From fouff at fouff.com  Wed Apr  6 02:16:13 2005
From: fouff at fouff.com (Fouff)
Date: Wed, 06 Apr 2005 08:16:13 +0200
Subject: Add System Path?!?
In-Reply-To: <mailman.1403.1112730254.1799.python-list@python.org>
References: <mailman.1403.1112730254.1799.python-list@python.org>
Message-ID: <42537ed3$0$13914$636a15ce@news.free.fr>

andrea_gavana at tin.it a ?crit :
> Hello NG,
> 
>     I have a GUI (written in wxPython) that calls some external exe files.
> Some of them requires that I add to the PATH variable 1 directory. Basically,
> the exe are located in:
> 
> /MyApp/Solvers/FirstExe
> /MyApp/Solvers/SecondExe
> 
> And so on, while the dll needed by these exe are located in:
> 
> /MyApp/MyDll
> 
> These exe files do not work if I don't set the PATH variable also to that
> adress. I know I can do it by hand (and also my users can), but I wonder
> if there is a way to do it in Python...
> 
> Thank you for all suggestions/pointers.
> 
> Andrea.
> 
> 
Why not just adding in your app

import os
os.environ['PATH'] += ";the_new_adress_needed_by_exe"

this will just modify locally to your app the environement variable PATH

If you want to modify it for ever, just open a console DOS (cmd.exe) and 
type:
set PATH=%PATH%;the_new_adress_needed_by_exe



From grobinson at goombah.com  Mon Apr 25 12:43:14 2005
From: grobinson at goombah.com (Gary Robinson)
Date: Mon, 25 Apr 2005 12:43:14 -0400
Subject: Python consulting opportunity
Message-ID: <20050425124314.551810.5d2da129@goombah.com>

We'd like to find an experienced Python programmer for a full-time, 
three-month consulting contract to help us with our product, Goombah 
(http://www.goombah.com). 

Experience with wxPython and/or PyObjC would be a big plus. More 
importantly we're looking for someone who can get up to speed very 
quickly and who is used to working independently.

A longer-term relationship is possible, but right now we're focused on 
adding a fixed set of features that we plan to add in the very 
near-term. It's a lot of work and we'll need help to get it done as 
quickly as we want.

If this sounds like an opportunity you'd be interested in, or if you 
know of someone who might be a match, please let us know.

Thanks,

Gary

-- 

Gary Robinson
CTO
Emergent Music, LLC
grobinson at goombah.com
207-942-3463
Company: http://www.goombah.com
Blog:    http://www.garyrobinson.net


From tmj at SPAMLESSjarmania.com  Sat Apr  2 05:33:04 2005
From: tmj at SPAMLESSjarmania.com (Tim Jarman)
Date: Sat, 02 Apr 2005 11:33:04 +0100
Subject: How to reload local namespace definitions in the python
	interpreter?
References: <1112435996.697236.231800@l41g2000cwc.googlegroups.com>
Message-ID: <3b7an1F6gf5b4U1@individual.net>

test1dellboy3 at yahoo.co.uk wrote:

> Hi,
> 
> I am a beginner using the python interpreter. To reduce typing effort,
> I created a module called "aliases.py" containing some aliases for
> objects I commonly use like -
> 
> aliases.py :
> 
> 
> import filecmp, os, commands
> 
> op = os.path
> go = commands.getoutput
> dc = filecmp.dircmp
> p1 = '/mnt/usbkey/flash/'
> p2 = '/mnt/fat32/myfiles/flash/'
> 
> When I start up the interpreter, I can simply type -
> 
> from aliases import *
> 
> This works fine, but each time I change any of the definitions in
> aliases.py, I
> have to restart the interpreter and type "from aliases import *"
> again. Is there any way to reload these definitions without restarting
> the interpreter?
> 
> -Slath

reload(aliases)

See: http://www.python.org/doc/2.4.1/lib/built-in-funcs.html

By the way, are you aware of the import ... as ... idiom?
e.g. import os.path as op

-- 
Website: www DOT jarmania FULLSTOP com


From rkern at ucsd.edu  Sun Apr 24 06:52:54 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 24 Apr 2005 03:52:54 -0700
Subject: Variables
In-Reply-To: <86hdhwr5y3.fsf@guru.mired.org>
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b255d.375304108@news.oz.net>
	<426B27C1.4000907@cloudthunder.com>	<mailman.2383.1114322077.1799.python-list@python.org>
	<86hdhwr5y3.fsf@guru.mired.org>
Message-ID: <d4fth0$iqe$1@sea.gmane.org>

Mike Meyer wrote:
> Robert Kern <rkern at ucsd.edu> writes:
> 
>>>Could I honestly argue this to him? From what basis do I argue that
>>>it is not an equation?
>>
>>It's his responsibility to show that it *is* an equation.
>>
>>x = x + 1
>>
>>Equation? I think not.
> 
> 
> I think it is. One equation in one unknown. The solution set for x is
> {}.
> 
> As a logical equation, it has the value false (just like 0 = 1).

Okay, okay, fair enough. But that interpretation has no correspondence 
with the behavior of that statement in a Python program. x always has a 
value (presuming it had one before the statement and no exceptions were 
raised during the addition operation).

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From gnb at itga.com.au  Thu Apr 21 03:26:43 2005
From: gnb at itga.com.au (Gregory Bond)
Date: Thu, 21 Apr 2005 17:26:43 +1000
Subject: PyObject_New not running tp_new for iterators?
In-Reply-To: <2r254d.moe.ln@lightning.itga.com.au>
References: <2r254d.moe.ln@lightning.itga.com.au>
Message-ID: <jjk74d.sl9.ln@lightning.itga.com.au>

I wrote:

[snip]

 > What am I missing?

The fundamental problem is that this:

>>    if (!(ro = PyObject_New(MyIter, &MyIterType)))
>>       return NULL;

is really only a malloc() - it doesn't call the tp_new function at all. 
  This is not really clear in the 2.3 version of the C API document that 
I was consulting - the 2.4 version is much clearer.

I have no idea how to do in C all the things that calling a class 
constructor in Python does.  Am I supposed to be calling tp_new & 
tp_init directly?

In the end, this particular class really only needs to be created from a 
factory function, so I removed the tp_new member altogether and just 
wrote a C function to initialise the object, and called that from the C 
factory function.

[The above is not particular to the fact that my class is an iterator - 
all C classes have the same behaviour.  My test of a plain-old class 
probably looked like it worked due to lucky memory patterns.]




From martijn at gamecreators.nl  Thu Apr 14 11:19:19 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 14 Apr 2005 08:19:19 -0700
Subject: Get the entire file in a variable - error
In-Reply-To: <mailman.1904.1113490666.1799.python-list@python.org>
References: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
	<mailman.1904.1113490666.1799.python-list@python.org>
Message-ID: <1113491959.087887.170580@f14g2000cwb.googlegroups.com>

I mean it like this.

I must have a variable that includes a file (in this case a .gz file)
for putting that in a database. (never null)

Thanks,



From peter at engcorp.com  Thu Apr 14 21:23:01 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 14 Apr 2005 21:23:01 -0400
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <mailman.1936.1113515553.1799.python-list@python.org>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>	<425EDE12.3030208@transnorm.ch>
	<200504142221.41290.james@wrong.nu>
	<mailman.1936.1113515553.1799.python-list@python.org>
Message-ID: <mJqdnUFo6dDrisLfRVn-sg@powergate.ca>

R. C. James Harlow wrote:
> On Thursday 14 April 2005 22:21, R. C. James Harlow wrote:
> 
>>You have to do that before Fredrick's script works...
> 
> 
> Damn - 'Fredrik's' - I accidentally decompressed his name.

It actually *is* "Fredrick", but the c is both silent,
and hidden...

-seemed-silly-enough-for-this-thread-ly y'rs,
  Peter


From james at wrong.nu  Fri Apr 15 23:23:41 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Sat, 16 Apr 2005 04:23:41 +0100
Subject: Piping data into script under Win32
In-Reply-To: <1113619417.667245.148500@g14g2000cwa.googlegroups.com>
References: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
	<mailman.1992.1113618215.1799.python-list@python.org>
	<1113619417.667245.148500@g14g2000cwa.googlegroups.com>
Message-ID: <200504160423.51729.james@wrong.nu>

On Saturday 16 April 2005 03:43, runes wrote:

> type countlines.py | python countlines.py = Success
> type countlines.py | countlines.py = Failure
>
> Why doesn't the latter work?

Don't quote me on this, but I think it's because invoking countlines.py 
involves running some sort of wrapper that discards its stdin and stdout.

If anyone has a more authorative answer, I'd like to know, because this caught 
me out too.

james.
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From rbt at athop1.ath.vt.edu  Fri Apr 15 09:37:25 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 15 Apr 2005 09:37:25 -0400
Subject: Determine ip address
In-Reply-To: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
References: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
Message-ID: <d3og2l$c6g$1@solaris.cc.vt.edu>

codecraig wrote:
> hi,
>    how can i use python to figure the ip address of the machine which
> the python script is running on?  I dont mean like 127.0.0.1....but i
> want the external IP address (such as ipconfig on windows displays).
> 
> any ideas??
> 
> THanks
> 

To get the public IP (like when you're behind a wirless router, etc) you 
may try doing something like this:

import urllib
import re
import time

ip_search = re.compile ('\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}')

try:
     f = urllib.urlopen("http://www.ipchicken.com")
     data = f.read()
     f.close()
     current_ip = ip_search.findall(data)
     if current_ip:
         print current_ip
         time.sleep(3)
except Exception:
     pass

HTH,

rbt


From mirnazim at gmail.com  Mon Apr 18 10:45:45 2005
From: mirnazim at gmail.com (Mir Nazim)
Date: 18 Apr 2005 07:45:45 -0700
Subject: Zope3 and Plone
Message-ID: <1113835544.983163.202080@z14g2000cwz.googlegroups.com>

Hi,

I wanted to know what will happen to plone once Zope3 will be official
version. Is plone being ported to Zope3. I googled it but did not come
accross anything stating the plone's migration to zope3.

I am thinking to take up a project. plone is a candidate for it. should
i want to take  benifit of zope3 features too.

what should be done. 

Please comment
thanks



From bedouglas at earthlink.net  Sun Apr 17 22:32:04 2005
From: bedouglas at earthlink.net (bruce)
Date: Sun, 17 Apr 2005 19:32:04 -0700
Subject: trying to parse a file...
Message-ID: <01f801c543be$cfc971e0$0301a8c0@Mesa.com>

hi,

i'm trying to modify an app (gforge) that uses python to do some file
parsing/processing...

i have the following shell file that uses python. if i understand it
correctly, it's supposed to modify the 'viewcvs.conf' file, and
replace/update the section with 'svn_roots'.

it isn't working correctly... can anybody tell me what i need to do?
basically, i'd like to continually add to the svn_root: block with an
additional line as required. also, can someone tell me what i'd need to do,
if i wanted to remove a line of text from the 'svn_root' block if i had a
given 'test_x:'

thanks

bruce
bedouglas at earthlink.net

-----------------------------------------------------------
viewcvs.conf:
  .
  .
  .
  #
  # This setting specifies each of the Subversion roots (repositories)
  # on your system and assigns names to them. Each root should be given
  # by a "name: path" value. Multiple roots should be separated by
  # commas and can be placed on separate lines.
  #
  #svn_roots = test2: /svn-gforge/uploadsvn
  svn_roots = test5: /gforge-svn/test7/svn,
              test2: /gforge-svn/test7/svn,
              test3: /gforge-svn/test7/svn,

  # The 'root_parents' setting specifies a list of directories in which
  # any number of repositories may reside.  Rather than force you to add
  .
  .
  .
-----------------------------------------------------------




[root at lserver2 bin]# cat test.sh
-----------------------------------------------------------
#! /bin/sh

python <<EOF
import sys
import os
import string
import ConfigParser
r = ConfigParser.RawConfigParser ()
r.read ("/etc/viewcvs/viewcvs.conf")
r.set ("general","svn_roots","")
l = os.listdir ("/var/lib/gforge/chroot/svnroot")
l2 = []
for d in l:
  l2.append (d + ": svn://localhost/" + d)
r.set ("general","svn_roots",string.join (l2, ', '))
r.set ("general","cvs_roots","")
r.set ("general","default_root", l [0])
r.write (open ("/var/lib/gforge/etc/viewcvs.conf", "w"))
EOF

sed 's,pathname = CONF_PATHNAME .*,pathname =
"/var/lib/gforge/etc/viewcvs.conf",' \
    /usr/lib/python2.3/site-packages/viewcvs/viewcvs.py >
/var/lib/gforge/etc/viewcvs.py
-----------------------------------------------------------





From benn at cenix-bioscience.com  Mon Apr 25 12:24:51 2005
From: benn at cenix-bioscience.com (Neil Benn)
Date: Mon, 25 Apr 2005 18:24:51 +0200
Subject: PyGTK vs. wxPython
In-Reply-To: <116q56ie4vqtu04@corp.supernews.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<116q56ie4vqtu04@corp.supernews.com>
Message-ID: <426D19D3.2060505@cenix-bioscience.com>

Grant Edwards wrote:

>On 2005-04-25, dcrespo <dcrespo at gmail.com> wrote:
>  
>
>>Hi all...
>>
>>I think wxPython is much better than PyGTK. First of all, PyGTK needs
>>the GTK runtime installed, whereas wxPython is entirely Python's
>>modules,
>>    
>>
>
>Huh?  wxPythonGTK requires GTK runtimes as well:
>
><snip>
>  
>
Hello,

          Guess he's talking about windows :

http://www.dropline.net/gtk/

    You will already have a windowing toolkit on windows - mfc/win32.

BTW, I cheated and saw a windows related question from above also same 
poster ;-)

Cheers,

Neil


-- 

Neil Benn
Senior Automation Engineer
Cenix BioScience
BioInnovations Zentrum
Tatzberg 46
D-01307
Dresden
Germany

Tel : +49 (0)351 4173 154
e-mail : benn at cenix-bioscience.com
Cenix Website : http://www.cenix-bioscience.com



From __peter__ at web.de  Fri Apr  1 05:04:11 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 01 Apr 2005 12:04:11 +0200
Subject: StopIteration in the if clause of a generator expression
Message-ID: <d2j6au$k1o$04$1@news.t-online.com>

To confuse a newbies and old hands alike, Bengt Richter wrote:

> Need something more straightforward, e.g., a wrapped one-liner:
> 
>  >>> def guess(n=3): print ("You're right!", 'No more tries for
>  >>> you!!!')[n-1 in
>  ...    (x for x in xrange(n) for t in [raw_input('Guess my name:
>  ')=='Ben']
>  ...    if not t or iter([]).next())]
>  ...
>  >>> guess()

To make it a bit clearer, a StopIteration raised in a generator expression
silently terminates that generator:

>>> def stop(): raise StopIteration
...
>>> list(i for i in range(10) if i < 5 or stop())
[0, 1, 2, 3, 4]

In a list comprehension, on the other hand, it is propagated:

>>> [i for i in range(10) if i < 5 or stop()]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 1, in stop
StopIteration

Is that an intentional difference?

Peter



From kay.schluehr at gmx.net  Sun Apr 10 10:18:10 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Apr 2005 07:18:10 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1642.1113141835.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<1113139772.023037.153620@l41g2000cwc.googlegroups.com>
	<mailman.1642.1113141835.1799.python-list@python.org>
Message-ID: <1113142690.674650.238460@o13g2000cwo.googlegroups.com>

Fredrik Lundh wrote:

> here are three alternatives:
>
>     ltree (http://codespeak.net/lxml/)
>     libxml2 (http://xmlsoft.org/downloads.html)
>     celementtree (http://effbot.org/zone/celementtree.htm)

Thanks, Fredrik, I will take a look. 

Ciao,
Kay



From spork at spork.narod.ru  Sat Apr 30 18:29:15 2005
From: spork at spork.narod.ru (Alex)
Date: 30 Apr 2005 15:29:15 -0700
Subject: array type casting problem in scipy.interpolate
References: <42732655@news.ColoState.EDU>
	<1114889551.101190.312080@l41g2000cwc.googlegroups.com>
Message-ID: <4273f8ab@news.ColoState.EDU>

On 30 Apr 2005 12:32:31 -0700, bgs <bgs248 at hotmail.com> said:
> The routine requires real arrays, and you are giving it one complex
> one.  It does not know what to do with the complex array.  What are you
> expecting it to do?  If you need the real and imaginary parts to be
> separately interpolated, then split the complex array into two real
> arrays and use the routine twice.

Hello,

Thanks for the pointer. I will interpolate the real and imaginary parts
separately then.

Regards,

Alex




From martin.witte at gmail.com  Sat Apr 30 07:28:30 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Apr 2005 04:28:30 -0700
Subject: How to run a program?
In-Reply-To: <mailman.56.1114857360.14961.python-list@python.org>
References: <mailman.56.1114857360.14961.python-list@python.org>
Message-ID: <1114860510.681773.86450@z14g2000cwz.googlegroups.com>

please read the documentation for subprocess,
http://docs.python.org/lib/node230.html



From le_cactus at msn.com  Fri Apr  8 16:55:39 2005
From: le_cactus at msn.com (Cactus)
Date: 8 Apr 2005 13:55:39 -0700
Subject: Declaring variables from a list
Message-ID: <1163d88e.0504081255.438fbb96@posting.google.com>

Hi,

If I got a list is it possible to declare a variable from the items in that list? 

Code Sample: 
Blob = ['Var1', 'Var2', 'vAR3']
i = 5
for listitems in Blob:
    i += 1
    listitems = i

print Var1
6
print Var2
7
print vAR3
8
 


Something like that? This doesn't work (obviously) but is there a way to do this?

TIA,
Cacti


From rockon02 at senet.com.au  Thu Apr 28 07:39:55 2005
From: rockon02 at senet.com.au (Mike brown)
Date: Thu, 28 Apr 2005 21:39:55 +1000
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
Message-ID: <rockon02-2804052139550001@1cust199.tnt5.adl1.da.uu.net>

> 4) I doubt seriously whether God plays a guitar, since guitars are made by 
> men, for men.  His Son could theoretically play a guitar.  Perhaps He does. 
> Perhaps He doesn't.  Only the Father and His Holy Angels know.


Perleeeese.

Do you really take this stuf seriously ?

It's like the ancient discussion about how many angels can dance on the
head of a pin, a lot of bullshit.

Sorry in advance to the believers amongst us, but these God Botherers
annoy the crap out of me.

Believe what you want to, but leave me alone.

MJRB


From mcfletch at rogers.com  Wed Apr 13 09:46:22 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Wed, 13 Apr 2005 09:46:22 -0400
Subject: preallocate list
In-Reply-To: <d3j6p7$ntl$1@scotsman.ed.ac.uk>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j6p7$ntl$1@scotsman.ed.ac.uk>
Message-ID: <425D22AE.2050302@rogers.com>

Jim wrote:

> Thanks for the suggestions. I guess I must ensure that this is my
> bottle neck.

...

>             for line in f:
>                 factor = []
>                 tokens = line.split()
>                 for i in tokens:
>                     factor.append(float(i))
>                 factors.append(loadFactor)
>
...

You might try:

    factors = [ [float(item) for item in line.split()] for line in f ]

avoiding the extra statements for appending to the lists.  Also might try:

    factors = [ map(float, line.split()) for line in f ]

though it uses the out-of-favour functional form for the mapping.

Good luck,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From mefjr75 at hotmail.com  Sat Apr  2 17:53:22 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 2 Apr 2005 14:53:22 -0800
Subject: Docorator Disected
In-Reply-To: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
Message-ID: <1112482402.694276.228230@z14g2000cwz.googlegroups.com>

Hello Ron ,
You have many good explanations already, but I thought that this
__might__ help others.
Like you I was confused by the decorator syntax. till I realized it was
shorthand for ...

def identity(f):
    return f

def foo():
    pass

# this is the 'old way'
foo =  identity(foo)

It just rebinds foo to the return value of the decorator function.
With the new syntax it becomes.

def identity(f):
    return f

@identity
def foo(self):
    pass
This is the same as above but now the function is
passed and rebound behind the scenes.
Also note that decorators don't have to be a nested function, it really
depends on what you are trying to achieve.

hth,
M.E.Farmer



From abkhd at earth.co.jp  Fri Apr 15 15:44:11 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 15 Apr 2005 12:44:11 -0700
Subject: Get OS name
References: <1113572595.889597.206690@g14g2000cwa.googlegroups.com>
	<1113574033.787739.318840@o13g2000cwo.googlegroups.com>
	<mailman.1976.1113578487.1799.python-list@python.org>
	<1113579720.273453.32480@g14g2000cwa.googlegroups.com>
Message-ID: <1113594251.364696.52290@z14g2000cwz.googlegroups.com>

codecraig wrote:
> my requirements for getting the OS info havent changed.  My first
> message says "How can I get the OS Name, such as "Windows XP Pro"."
> ....that's what I wanted all along.
>
> thanks for the information anyway, i believe platform is better than
my
> previous approach.
>
> thanks



Please note that platform appears to require win32api to be in your
system. The following is the code from \Lib\platform.py.

The function that gets the data sets these values as default

[Code from platform.py]
def win32_ver(release='',version='',csd='',ptype=''):
[/Code]

And will return empty strings in case win32api is not found:

[Code from platform.py]
    # Import the needed APIs
    try:
        import win32api
    except ImportError:
        return release,version,csd,ptype
[/Code from platform.py]


Accordingly, my Python 2.3.5 final which has win32api installed can get
the platform answer right:

$ /py23/python/dist/src/MinGW/python -i
Python 2.3.5 (#62, Feb 12 2005, 02:56:20)
[GCC 3.4.2 (mingw-special)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import platform
>>> print platform.system(), platform.release()
Windows 98
>>>



But where I don't have win32api installed, my Python does not know that
answer you seek:


$ /py25/python/dist/src/MinGW/python -i
Python 2.5a0 (#65, Apr 12 2005, 20:22:54)
[GCC 3.4.2 (mingw-special)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import platform
>>> print platform.system(), platform.release()
Windows 
>>> 



Regards,
Khalid



From scmarsh at hotmail.com  Mon Apr 18 13:25:54 2005
From: scmarsh at hotmail.com (scott)
Date: Mon, 18 Apr 2005 17:25:54 GMT
Subject: EasyDialogs module problem with python 2.4.1
Message-ID: <C4S8e.1063265$Xk.1017278@pd7tw3no>

First my setup:

I'm using the framework build of Python 2.4.1

( http://bob.pythonmac.org/archives/2005/03/31/macpython-241-installer/ )

on an ibook G4 running Mac OS 10.3.8.

I installed wxPython 2.5.5.1 ( Unicode runtime 2.5.5.1 for the Panther 
version of Macpython-OSX 2.4 )

( http://wxpython.org )

Now my problem:

EasyDialogs module

( http://www.python.org/doc/2.4.1/mac/module-EasyDialogs.html )

works with pyshell (interactive python program included with wxPython) 
but not with python launched at the terminal:
ie:

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

PyShell 0.9.4 - The Flakiest Python Shell
Sponsored by Orbtech - Your source for Python programming expertise.
Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>>import EasyDialogs
 >>>EasyDialogs.Message('hi')


From mauriceling at acm.org  Fri Apr 29 20:38:30 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sat, 30 Apr 2005 10:38:30 +1000
Subject: Python site-packages and import
References: <ced73313.0504290331.6a0f39e4@posting.google.com>
Message-ID: <d4uk27$jfr$1@domitilla.aioe.org>

Peter Saffrey wrote:

> (apologies for starting a new thread - Google can't retrieve the other
> message for some reason)
> 
> Yes, /usr/lib/python/site-packages is in sys.path. This series of
> commands should explain what I mean: I've put the Python ID3 module in
> a sub-directory of site-packages as an illustration.
> 
> pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/
> ID3.py  ID3.pyc  ID3.pyo  README  apt_inst.so  apt_pkg.so  apt_proxy 
> bsddb3  debconf.py  debconf.pyc  debconf.pyo  id3  pj  twisted
> 
> pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/apt_proxy/
> __init__.py   __init__.pyo  apt_proxy.pyc  apt_proxy_conf.py  
> apt_proxy_conf.pyo  apt_proxytap.pyc  memleak.py   memleak.pyo 
> misc.pyc  packages.py   packages.pyo
> __init__.pyc  apt_proxy.py  apt_proxy.pyo  apt_proxy_conf.pyc 
> apt_proxytap.py     apt_proxytap.pyo  memleak.pyc  misc.py     
> misc.pyo  packages.pyc  twisted_compat
> 
> pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/id3       
> ID3.py  ID3.pyc  ID3.pyo
> 
> pzs at bonnie:~$ python
> Python 2.3.5 (#2, Feb  9 2005, 00:38:15) 
> [GCC 3.3.5 (Debian 1:3.3.5-8)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>import sys
>>>>sys.path
> 
> ['', '/usr/lib/python23.zip', '/usr/lib/python2.3',
> '/usr/lib/python2.3/plat-linux2', '/usr/lib/python2.3/lib-tk',
> '/usr/lib/python2.3/lib-dynload',
> '/usr/local/lib/python2.3/site-packages',
> '/usr/lib/python2.3/site-packages']
> 
>>>>import apt_proxy.memleak
>>>>import id3.ID3
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: No module named id3.ID3
> 
> 
> 
> 
> Peter

your site-package/id3 lacks a __init__.py file. '__init__.py' file can 
be just an empty file but it needs to be there for python to be 
considered as a package.

Alternatively, you can use 'from id3 import ID3' instead of 'import id3.ID3'

Cheers
Maurice


From ishpeck at gmail.com  Wed Apr 27 09:41:51 2005
From: ishpeck at gmail.com (Ishpeck)
Date: 27 Apr 2005 06:41:51 -0700
Subject: Internet Explorer, COM+, Javascript and Python
Message-ID: <1114609311.916761.272980@f14g2000cwb.googlegroups.com>

I need to make IE execute javascript in a web page with COM+ and
Python.

Similarly to the way they do it in this article. . .

http://www.codeproject.com/com/jscalls.asp



From Please  Sun Apr 24 19:28:03 2005
From: Please (Please)
Date: 24 Apr 2005 18:28:03 -0500
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_yo?=
 =?iso-8859-1?q?ur_location=2E_I_want_to_ask_you_the_most_important_questi?=
 =?iso-8859-1?q?on_of_your_life=2E_Your_joy_or_sorrow_for_all_eternity_dep?=
 =?iso-8859-1?q?ends_upon_your_answer=2E_The_question_is=3A_Are_you_saved?=
 =?iso-8859-1?q?=3F_It_is_not_a_question_of_how_good_you_are=2C_nor_if_you?=
 =?iso-8859-1?q?_are_a_church_member=2C_but_are_you_saved=3F_Are_you_sure_?=
 =?iso-8859-1?q?you_will_go_to_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP?=
 =?iso-8859-1?q?=B7POST=B7149?=
References: <1114384941.623433.251470@o13g2000cwo.googlegroups.com>
Message-ID: <skao61lo25q4kdaqnf5tdd228r7vjjo0a2@4ax.com>

Reports to groups-abuse at google.com, abuse at aol.net, domains at aol.net,
abuse at yahoo.com, abuse at yahoo-inc.com

And do not feed the troll!


From mwm at mired.org  Sun Apr 24 03:11:04 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 24 Apr 2005 02:11:04 -0500
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<86u0lwrfbw.fsf@guru.mired.org>
	<mailman.2375.1114316225.1799.python-list@python.org>
Message-ID: <86pswkr6nr.fsf@guru.mired.org>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:

> Mike Meyer wrote:
>>First, new disciplines often redefine words to mean something
>>different than the disciplines they were derived from. Variable is a
>>good example of that. In math, a variable is a placeholder in an (a
>>system of) equation(s), and will have associated with it a (possibly
>> empty) set of values that satisfy the equation(s).
>>
> Not merely a placeholder, right? A variable in math is a 'placeholder'
> for a dynamic value, one which can or does change. If one can graph
> the movement (change) of foo, foo is a variable within that scope. For
> example:
>
> foo = 5
> foo = 6
>
> I can graph foo's movement/change. It can thus be considered a
> variable within mathematics. If I write:

No. When I'm wearing my mathematicians hat, variables don't change
values.  What you are describing is a function, "foo", describing a
mapping from time to numbers. You can graph that function. When doing
calculus, we talk about the "rate of change" of a variable with
respect to a second variable (dfoo/dt), but that's just shorthand for
talking about the system foo = f(t). In this case, foo is a variable
that has a solution set with many possible values. If you add an
equation specifying t (i.e., t = 0) to the system, you'll change the
solution set for foo to a single value: {f(t)}.

Now, when I'm wearing my programmers hat, variables can be bound to
different values (or, in other languages, change values) as the
program progresses. In this case, the variable *is* changing.

> foo = 5
>
> I can graph this but it will merely be a static point, a
> constant. Constants are not variables because they do not change, they
> do not "vary" in content.

Actually, the graph of foo = 5 is a straight line, passing through the
point 5 on the foo axis, and parallel to any other axis in the
system. It's a very simple system, with one equation in one variable
with one possible solution.

Ask your friend if foo is a variable if you write:

foo = sqrt(1)

In this case, the solution set for foo is {1, -1}. In Python, foo has
the value 1.0 (if you do "import sqrt from math"). While there are
programming languages that support multiple return values for
functions, I'm not aware of any that define sqrt so that it will
return both 1 and -1 (and I *have* to wonder if that's worth a PEP).

>>In math, if you say "foo = 5", foo is a variable, with a single value
>>(5) that satisfies the equation. In Python, if you say "foo = 5", foo
>>is a variable, that currently references the value 5.
>>
>>
> He would argue strongly against your notion of variable. In the
> statement "foo = 5", foo is constant. He would thus argue that foo is
> a constant and not a variable (regardless of whether you change foo's
> value in subsequent statements).

He's wrong. Foo is a variable in the single-equation system "foo =
5". The solution set for it is {5}. If the two equations are "foo = 5"
and "foo = 6", then foo is a variable in a two-equation system with a
solution set of {} (the empty set).

I'd recommend your friend pick up an algebra textbook. It's been so
long since I did any that I can't recommend one, though.

Never forget: Constants aren't, variables won't.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From deetsNOSPAM at web.de  Tue Apr 12 07:17:54 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 12 Apr 2005 13:17:54 +0200
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<d3955k$kne$00$1@news.t-online.com>
	<pan.2005.04.09.21.20.39.130792@jerf.org>
	<d3b4b6$31o$00$1@news.t-online.com>
	<pan.2005.04.10.17.09.15.112872@jerf.org>
Message-ID: <d3gaor$j6m$04$1@news.t-online.com>

Hi,

> So, instead, with this new system (note I wasn't involved with the old
> system), I do everything with metadata. (Credit where credit is due, the
> other programmer was starting to do some of this, though he couldn't quite
> take it down to the interface and there are some things I had to add
> later.) Every "thing" (class) has a description of what it's made out of,
> and what type each of those things are. When I go to edit an instance, the
> Javascript pulls down that description, and a description of the instance
> (and all of its associated sub-instances), and instead *generates* a form
> to edit the object based on what it is made of.

Ok. I can assure you that I've been doing that myself, and that this
attitude describes my general approach to computers and programming: If the
machine can be told to do tedious work for me, I'd rather tell her how to
do it than do that work myself for the thousands time. I did this for a
LDAP browser/editor once, nice thing. But - there is a big BUT here - if
we're talking about GUIs, we inevitably enter the realm of taste and
customization requirements. And that's the point where things get tricky:
technically inclined people can be easily satisfied with simple and pureley
functional interfaces. But even I as a strong FFF (form follows function)
believer have to say: The form _does_ matter, once the function is in
place. In my more complicated qt forms, I had to invest quite an amount of
time to rearrange my controls in a way that (hopefully) communicated the
purpose of the whole thing. These days the rollout will come and certainly
some feedback will tell me that I still didn't do a perfect or even good
job. But then I'll fire up my designer, and can rearrange things - without
further bothering in the code.

To me the importent lesson to learn is not to mingle layout with logic. And
as layout follows its own rules (that techies sometimes have difficulties
to grasp), one should be as flexible and powerful with layouting tools as
it gets.

> How do I decide the order to create the fields? Classes carry a metadata
> field called "order" that lists the fields it wants in order, the
> remainder will by default be tacked on the end. What if I don't want a
> certain field to display? There's a metadata field that lists the ones we
> want to display for editing, there's another I can use to just filter a
> couple out if the first isn't present. What if I want a particular widget
> to do something special like be a certain width? I've created a metadata
> "escape hatch" that lets me pass parameters directly to the <input> node;
> it's "bad style", but sometimes useful. Everything I use is backed by a
> database which has limited typing abilities, so I have a field called
> "humantype" that declares the human type of the data, so I can then create
> intelligent widgets for that, too. One of the things we can do, for
> instance, is create an "image" widget that specifies a URL for an image,
> and as validation, shows it there in the browser. We could also make it
> accept uploads. Then, just by labelling a field as an "htmlImage", we get
> the image editor, no form redesign, no muss, no fuss.

I'm not convinced that this is really a superiour way to go. I'm all with
you in terms of form-validation, constraint checking and mapping to the
persistence layer. I do all of this based on meta-information (or
reflection, which is the same). But what you propose is that you create a
style-annotation which in the end will grow until it becomes a unmanagable
beast. Instead, I prefer to have the designer (this time the person doing
the html templates, not the tool) make the decision if a text-property of
my object becomes a simple <input type='text'> or a <textarea> - to me,
both just contain and propagate strings.

So I say: Use html (or qt xml gui description files) for what they are, and
programming for the rest.

Having said that, I can only emphasize again that I'm very well in favour of
automation of tasks - and where my data-types have an inherant flexibility,
I certainly prefer to generate editing forms (as e.g. zope does for
zclasses) instead of having to write them on my on. But usually
customization will be required, and then I'll have to deliver it.


-- 
Regards,

Diez B. Roggisch


From jdhunter at ace.bsd.uchicago.edu  Fri Apr  8 10:17:19 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Fri, 08 Apr 2005 09:17:19 -0500
Subject: Matplotlib question-- Numeric or numarray?
In-Reply-To: <ujtc519cgj0iltaamqqihpghckektkrjf3@4ax.com> (Matt Feinstein's
	message of "Fri, 08 Apr 2005 08:23:42 -0400")
References: <ujtc519cgj0iltaamqqihpghckektkrjf3@4ax.com>
Message-ID: <m3zmw9wdxs.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Matt" == Matt Feinstein <nospam at here.com> writes:

    Matt> I'm working my way through the matplotlib documentation &
    Matt> there's a point that's ambiguous-- the pdf file (dated
    Matt> Mar. 1, 2005) warns of dire consequences if I use the
    Matt> 'wrong' array package-- e.g., put numarray in the .matlabrc
    Matt> file if the compile-time package is Numeric.  But there's
    Matt> only one current, unlabeled, windows installer and there
    Matt> seems to have been a change, some time back before version
    Matt> 0.7, in how this question is dealt with. Can someone
    Matt> clarify?  thnksndvnc

Hi Matt -- it looks like the documentation is out of data.  matplotlib
can now be built to support Numeric and numarray simultaneously, and
which one you are using is controlled at runtime by the numerix
setting in your rc file.  The windows installers now have support for
both Numeric and numarray built in.

I recommend you use the matplotlib.numerix module to import your
Numeric/numarray symbols in matplotlib scripts, rather than using
Numeric/numarray directly.  The reason is that it is still important
that the arrays you create match the type in your rc file, and the
numerix module insures that this happens.

One good way to do this is

  import matplotlib.numerix as nx
  a = nx.array(blah)


The matplotlib numerix package structure mirros numarray.  Eg to
import mean, you would do

  from matplotlib.numerix.mlab import mean

which in numarray is located in numarray.mlab and in Numeric is in
MLab.

If trying to figure out where all the various numerix functions live
makes your head hurt, you can use the pylab module which aggregates
all the numerix and plotting functions into a single namespace

    import pylab as p

    a = p.array([1,2,3])
    n = p.randn(10000)
    mu, sigma = p.mean(n), p.std(n)

    p.hist(n, 1000)

    p.show()


Hope this helps,
JDH





From max at alcyone.com  Fri Apr  1 02:30:42 2005
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 31 Mar 2005 23:30:42 -0800
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
Message-ID: <l-qdnS9Is-M_ZdHfRVn-vA@speakeasy.net>

Daniel Silva wrote:

> Shriram Krishnamurthi has just announced the following elsewhere; it might
> be of interest to c.l.s, c.l.f, and c.l.p:
> http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html

April Fool's Day again, eh?

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   If you can't fight and you can't flee, flow.
   -- Robert Elliot


From ruach at chpc.utah.edu  Fri Apr  8 13:55:52 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 11:55:52 -0600
Subject: Can dictionary values access their keys?
In-Reply-To: <4256b3d3$1@nntp0.pdx.net>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu> <4256b3d3$1@nntp0.pdx.net>
Message-ID: <d36gj9$t44$1@vegh.ks.cc.utah.edu>

Scott David Daniels wrote:
> Matthew Thorley wrote:
> 
>> This may be a very rudimentary question, but here goes:
> 
> From your questions, I believe you are not thinking of values as
> being distinct from the names and data structures that refer to them.
> 
> What is the parent of 23 in the following expression?
> 
>     1 + 11 * 2
> 
> If you know that, what is the parent of 293 in the same expression?
> 
>> If I have a simple dictionary, where the value is a class or function,
>> is there an interface through which it can discover what its key is?
>> Similar to index() for list.
> 
> 
>     def keyfor(dictionary, element):
>         for key, value in dictionary.iteritems():
>             if value == element:  # value is element if identity quest
>                 return key
>         raise ValueError, element
> 
>> On a similar note, if one object is part of another, 
> 
> This is the idea you have wrong.  In C, C++, Java, and Fortran you
> might have objects part of other objects, but in Python objects refer
> to each other.
> 
> How about this:
> 
>     class Holder(object): pass
> 
>     v = [1 + 11 * 2]
>     w = [1, v, 3]
>     d = {1: v}
>     o = Holder()
>     o.x = v
> 
> What is the parent of v?
> 
> Or even worse:
> 
>     v = [1]
>     v[0] = v
> 
> What is the parent of v now?
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org

I see what your saying, but I my situation the values of the dictionary
are unique objects created by a parent object. Sorry :(, I didn't
explain that very well in my first post.

When the 'root object' is 'global' I see what your saying, but when

class A:
  def __init__(self, container):
    self.container=container

class B(dict):
  def magice_get_parent(self):
     ...

class special_value():
  def __init__(self, val):
     self.val = val

  def magic_get_key(self):
    ...

parent = A(B)
parent.container[x] = special_value(1)
parent.container[y] = special_value(2)
parent.container[z] = special_value(1)


In this example, in my mind, the following should happen, and in theory
using introspecition, actualy possible.

child = parent.container
D.magic_get_parent() #returns parent


value1 = parent.container[x]
value2 = parent.container[y]
value3 = parent.container[z]

value1.magic_get_key() #returns x
value2.magic_get_key() #returns y
value3.magic_get_key() #returns z

Let me know if I'm nutz!
--Matthew



From deetsNOSPAM at web.de  Fri Apr  1 08:45:24 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 01 Apr 2005 15:45:24 +0200
Subject: Ternary Operator in Python
References: <mailman.1173.1112340305.1799.python-list@python.org>
Message-ID: <d2jj9k$6o7$00$1@news.t-online.com>

praba kar wrote:

> Dear All,
>     I am new to Python.  I want to know how to
> work with ternary operator in Python.  I cannot
> find any ternary operator in Python.  So Kindly
> clear my doubt regarding this

There is no ternary operator in python. There are several idioms that can be
used to emulate one to a certain degree - but they are scolwed on by quite
a few people. So better to not use them and just do it in a if: else:
clause. 

-- 
Regards,

Diez B. Roggisch


From bokr at oz.net  Fri Apr 22 01:03:07 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 05:03:07 GMT
Subject: grouping subsequences with BIO tags
References: <wPidnSMBAONhgfXfRVn-sw@comcast.com>
Message-ID: <42686970.196123600@news.oz.net>

On Thu, 21 Apr 2005 15:37:03 -0600, Steven Bethard <steven.bethard at gmail.com> wrote:

>I have a list of strings that looks something like:
>     ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
>I need to group the strings into runs (lists) using the following rules 
>based on the string prefix:
>     'O' is discarded
>     'B_...' starts a new run
>     'I_...' continues a run started by a 'B_...'
>So, the example above should look like:
>     [['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]
>
>At the same time that I'm extracting the runs, it's important that I 
>check for errors as well.  'I_...' must always follow 'B_...', so errors 
>look like:
>     ['O', 'I_...']
>     ['B_xxx', 'I_yyy']
>where 'I_...' either follows an 'O' or a 'B_...' where the suffix of the 
>'B_...' is different from the suffix of the 'I_...'.

With error checks on predecessor relationship,
I think I'd do the whole thing in a generator,
doing my own groupby as I went.
E.g., see if this does what you want
(slightly different error checking):

 >>> L = ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
 >>> def get_runs(seq):
 ...     subseq =[]
 ...     curr = '<NO PRIOR ELEMENTS>'
 ...     for latest in seq:
 ...         curr, last = latest, curr
 ...         if curr.startswith('B_'):
 ...             if subseq: yield subseq
 ...             subseq = [curr]
 ...         elif curr.startswith('I_'):
 ...             if (last[:2] not in ('B_', 'I_') or
 ...                 last[2:] != curr[2:]
 ...             ): raise ValueError, '%r followed by %r'%(last, curr)
 ...             subseq.append(curr)
 ...         elif curr!='O':
 ...             raise ValueError, 'Unrecognized element: %r' % curr
 ...     if subseq: yield subseq
 ...
 >>> list(get_runs(L))
 [['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]

But note that I allowed multiple I_X, did you want to do that?
 >>> list(get_runs('B_X I_X I_X'.split()))
 [['B_X', 'I_X', 'I_X']]

Did you want all these "errors" caught?
 >>> list(get_runs('B_X I_X ?_X'.split()))
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 15, in get_runs
 ValueError: Unrecognized element: '?_X'
 >>> list(get_runs('I_X I_X ?_X'.split()))
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 12, in get_runs
 ValueError: '<NO PRIOR ELEMENTS>' followed by 'I_X'
 >>> list(get_runs('B_X I_Y ?_X'.split()))
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 12, in get_runs
 ValueError: 'B_X' followed by 'I_Y'

Does that do what you want? (BTW, I added an error check against ['B_X', '*_X'] and such)

>
>This is the best I've come up with so far:
>
>py> class K(object):
>...     def __init__(self):
>...         self.last_result = False
>...         self.last_label = 'O'
>...     def __call__(self, label):
>...         if label[:2] in ('O', 'B_'):
>...             self.last_result = not self.last_result
Thanks for nice reminder that groupby doesn't need distinct keys
for all groups, just different from last ;-)

>...         elif self.last_label[2:] != label[2:]:
>...             raise ValueError('%s followed by %s' %
>...                              (self.last_label, label))
>...         self.last_label = label
>...         return self.last_result
>...
>py> def get_runs(lst):
>...     for _, item in itertools.groupby(lst, K()):
>...         result = list(item)
>...         if result != ['O']:
>...             yield result
>...
>py> list(get_runs(['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']))
>[['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]
>py> list(get_runs(['O', 'I_Y']))
>Traceback (most recent call last):
>   ...
>ValueError: O followed by I_Y
>py> list(get_runs(['B_X', 'I_Y']))
>Traceback (most recent call last):
>   ...
>ValueError: B_X followed by I_Y
>
>Can anyone see another way to do this?
>
Well, there's no end to "another way", but above
is my .02USD ;-)

Regards,
Bengt Richter


From rune.strand at gmail.com  Fri Apr 15 22:43:37 2005
From: rune.strand at gmail.com (runes)
Date: 15 Apr 2005 19:43:37 -0700
Subject: Piping data into script under Win32
In-Reply-To: <mailman.1992.1113618215.1799.python-list@python.org>
References: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
	<mailman.1992.1113618215.1799.python-list@python.org>
Message-ID: <1113619417.667245.148500@g14g2000cwa.googlegroups.com>

You being so sure about what you were saying, was what I needed.
Thanks!

Under Windows, I'm used to rely on the PATHEXT env. variable, so I
typically don't write "python scriptname.py args", but just "scriptname
args".

So:
type countlines.py | python countlines.py = Success
type countlines.py | countlines.py = Failure

Why doesn't the latter work?

Traceback:
F:\groks>type countlines.py | countlines.py
The process tried to write to a nonexistent pipe.
Traceback (most recent call last):
  File "C:\groks\countlines.py", line 2, in ?
    data = sys.stdin.readlines()
IOError: [Errno 9] Bad file descriptor



From jstroud at mbi.ucla.edu  Tue Apr  5 23:11:49 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 5 Apr 2005 20:11:49 -0700
Subject: Best editor
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <200504052011.49968.jstroud@mbi.ucla.edu>

On Tuesday 05 April 2005 11:22 am, ChinStrap wrote:
> I keep hearing everyone say Emacs, but I can't understand it at all.

Both emacs and vi suffer from the fact that they can not be used by ordinary 
humans. Thus, I recommend using either to impress your friends.

James


From opengeometry at yahoo.ca  Fri Apr 22 11:16:16 2005
From: opengeometry at yahoo.ca (William Park)
Date: Fri, 22 Apr 2005 11:16:16 -0400
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
Message-ID: <d47ef$42691540$d1b71688$1083@PRIMUS.CA>

Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
...
> ID --> 	<Gene-track_geneid>320632</Gene-track_geneid>
...
> Product-type --> <Entrezgene_type value="protein-coding">6</Entrezgene_type>
...
> EC --> <Prot-ref_ec>
>         <Prot-ref_ec_E>1.5.1.5</Prot-ref_ec_E>
>         <Prot-ref_ec_E>3.5.4.9</Prot-ref_ec_E>
>       </Prot-ref_ec>
...
>
> Some can happen more than once in a record.

Since all your data are contained in unique tags on individual lines,
you can tackle this so many different ways.  Okey, that's your input
format.  What is your output format?

-- 
William Park <opengeometry at yahoo.ca>, Toronto, Canada
Slackware Linux -- because it works.


From baza41 at NOSPAM.gmail.com  Fri Apr  1 17:56:16 2005
From: baza41 at NOSPAM.gmail.com (Mr6)
Date: Fri, 01 Apr 2005 23:56:16 +0100
Subject: System bell
In-Reply-To: <424d0662.7277153@news.oz.net>
References: <BE723DD5.63FD%baza@themauvezone.fsnet.co.uk>
	<20050331235011.GD1786@ActiveState.com>
	<mailman.1171.1112339197.1799.python-list@python.org>
	<424d0662.7277153@news.oz.net>
Message-ID: <d2kjig$rjt$1@newsg3.svr.pol.co.uk>

Bengt Richter wrote:
> On Fri, 01 Apr 2005 02:06:07 -0500, Steve Holden <steve at holdenweb.com> wrote:
> 
> 
>>Trent Mick wrote:
>>
>>>[Baza wrote]
>>>
>>>
>>>>Am I right in thinking that >>>print "\a" should sound the system, 'bell'?
>>>
>>>
>>>It works on the shell on Windows for me (WinXP).
>>>
>>>Trent
>>>
>>
>>Interesting. From a Cygwin bash shell I got an elegant little dingish 
>>sort of a beep (my volume control was set kind of low). I then ran the 
>>same code in a Windows shell and nearly deafened myself. It appears that 
>>the volume control doesn't affect the Windows XP commans shell beep - 
>>even muting the Windows audio output doesn't stop it (though it does 
>>stop the Cygwin beep). This could cause heart attacks!
>>
> 
>

It's a weird thing. But if I run print "\a" from idle it does not work. 
But if I save as a file, say, sound.py. Then run that with python 
sound.py it does.

Why is that?

B


From electric.sunrise at gmail.com  Wed Apr  6 23:23:11 2005
From: electric.sunrise at gmail.com (Matt@revera)
Date: 6 Apr 2005 20:23:11 -0700
Subject: Overwrite just one line? Am I a n00b or is this impossible?
	Both? :D
In-Reply-To: <PtKdnVpGjLlOwsnfRVn-gg@speakeasy.net>
References: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>
	<PtKdnVpGjLlOwsnfRVn-gg@speakeasy.net>
Message-ID: <1112844191.105938.158340@o13g2000cwo.googlegroups.com>

Ok the key was "r+b" as opposed to "a+b" but why is that?  R is for
read, correct?  And b for binary.  Adding the plus gives me some form
of write capability?



From dalke at dalkescientific.com  Tue Apr  5 14:43:55 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Tue, 05 Apr 2005 18:43:55 GMT
Subject: oracle interface
Message-ID: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>

In searching I find there several different ways to
connect to an Oracle server on MS Windows:

  mxODBC - http://www.egenix.com/files/python/mxODBC.html
    built on top of the ODBC drivers for a given database

  DCOracle2 - http://www.zope.org/Members/matt/dco2/
    last update is 1.3 beta released 2 years ago?

  cx_oracle - http://www.computronix.com/utilities.shtml
     
  oc8py - http://sourceforge.net/projects/oci8py
    Looks dead

Based on my own observations, people generally use the
first two packages.  Left to me I would use DCOracle2
because I've used it under unix - I have rather little
MS Windows experience.

There hasn't been much discussion about either option
on c.l.py so I'ld be grateful for feedback.

				Andrew
				dalke at dalkescientific.com



From rkern at ucsd.edu  Mon Apr  4 11:30:46 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 04 Apr 2005 08:30:46 -0700
Subject: distutils
In-Reply-To: <mailman.1278.1112598343.1799.python-list@python.org>
References: <mailman.1278.1112598343.1799.python-list@python.org>
Message-ID: <42515db0$1_2@alt.athenanews.com>

Guillaume JULLIEN wrote:
> Hi,
> 
> New to python, I' m trying to use distutils.
> And I get this error
> 
> # python setup.py build
> Traceback (most recent call last):
>   File "setup.py", line 89, in ?
>     from distutils import core
> ImportError: No module named distutils
> 
> I have Python 2.3.4 installed
> 
> Any advice ?

I assume that you are on Linux or FreeBSD or somesuch. Install the 
Python development package for your system. It usually has a name like 
python-dev or python-devel.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From steven.bethard at gmail.com  Wed Apr 27 14:43:18 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 27 Apr 2005 12:43:18 -0600
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <mailman.2595.1114625255.1799.python-list@python.org>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<mailman.2595.1114625255.1799.python-list@python.org>
Message-ID: <mdudnZMQzJvYQPLfRVn-vg@comcast.com>

James Stroud wrote:
> Oops, last one had a typo:
> 
> 
> a = ['bob', 'greg', 'cindy', 'alice']
> b = ['fred','barney','betty','wilma','pebbles','bambam']
> c = ['jed', 'granny', 'jethro', 'ellie-mae']
> d = ['bob','carol','ted','alice']
> 
> e = [a,b,c,d]
> 
> for ary in e:
>   print ary
> 
> e.sort(lambda x,y:cmp(x[1],y[1]))
> 
> for ary in e:
>   print ary
> 
> e.sort(lambda x,y:cmp(x[0],y[0]))
> 
> for ary in e:
>   print ary

I would probably use the key= argument instead of the cmp= argument. 
Not only is it easier, but it'll probably be faster too:

py> lst = [['bob', 'greg', 'cindy', 'alice'],
...        ['fred', 'barney', 'betty', 'wilma', 'pebbles', 'bambam'],
...        ['jed', 'granny', 'jethro', 'ellie-mae'],
...        ['bob', 'carol', 'ted', 'alice']]
py> import operator
py> lst.sort(key=operator.itemgetter(3))
py> lst
[['bob', 'greg', 'cindy', 'alice'], ['bob', 'carol', 'ted', 'alice'], 
['jed', 'granny', 'jethro', 'ellie-mae'], ['fred', 'barney', 'betty', 
'wilma', 'pebbles', 'bambam']]
py> lst.sort(key=operator.itemgetter(0))
py> lst
[['bob', 'greg', 'cindy', 'alice'], ['bob', 'carol', 'ted', 'alice'], 
['fred', 'barney', 'betty', 'wilma', 'pebbles', 'bambam'], ['jed', 
'granny', 'jethro', 'ellie-mae']]
py> lst.sort(key=operator.itemgetter(slice(2)))
py> lst
[['bob', 'carol', 'ted', 'alice'], ['bob', 'greg', 'cindy', 'alice'], 
['fred', 'barney', 'betty', 'wilma', 'pebbles', 'bambam'], ['jed', 
'granny', 'jethro', 'ellie-mae']]

Note that you can pass slice objects to operator.itemgetter, so the last 
example is like "key=lambda x: x[:2]".

STeVe


From simoninusa2001 at yahoo.co.uk  Tue Apr  5 23:47:52 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 5 Apr 2005 20:47:52 -0700
Subject: Installing Python 2.4 on Linux
In-Reply-To: <pan.2005.04.05.22.59.24.557828@gmail.com>
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
	<pan.2005.04.05.22.59.24.557828@gmail.com>
Message-ID: <1112759272.268278.19210@l41g2000cwc.googlegroups.com>

Marcin Stepnicki wrote:

> It's rather Fedora related, I have Python 2.2, 2.3 and 2.4 on my
Ubuntu
> box and they seem to coexist without problems.

It's not a Fedora problem at all.

The 2.4.1 RPM's just move the default /usr/bin/python symlink to point
to the new Python24 instead of Python23 that is the system default. You
can move it back and then just point to it in the shebang in your
scripts (#!/usr/bin/python24)

Or you could compile 2.4 from source as I did, then you won't need to
change symlinks, just install it in /usr/local/bin/python24 or
something. I prefer this method, as it means you can have a seperate
2.4 install of wxPython etc (just change the LD_LIBRARY_PATH).



From bronger at physik.rwth-aachen.de  Wed Apr 20 08:14:57 2005
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 20 Apr 2005 14:14:57 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
Message-ID: <87r7h5lk5a.fsf@wilson.rwth-aachen.de>

Hall?chen!

nde at no.spam.org (Nick Efford) writes:

> seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
>> Many people I know ask why Python does slicing the way it does.....
>
>> Can anyone /please/ give me a good defense/justification???
>
>> I'm referring to why mystring[:4] gives me elements 0, 1, 2 and 3
>> but *NOT* mystring[4] (5th element).
>
> mystring[:4] can be read as "the first four characters of
> mystring".  If it included mystring[4], you'd have to read it as
> "the first five characters of mystring", which wouldn't match the
> appearance of '4' in the slice.
>
> [...]
>
> It all makes perfect sense when you look at it this way!

Well, also in my experience every variant has its warts.  You'll
never avoid the "i+1" or "i-1" expressions in your indices or loops
(or your mind ;).

It's interesting to muse about a language that starts at "1" for all
arrays and strings, as some more or less obsolete languages do.  I
think this is more intuitive, since most people (including
mathematicians) start counting at "1".  The reason for starting at
"0" is easier memory address calculation, so nothing for really high
level languages.

But most programmers are used to do it the Python (and most other
languages) way, so this opportunity has been missed for good.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus


From eee at nmt-dot-edu.no-spam.invalid  Sat Apr  9 15:22:30 2005
From: eee at nmt-dot-edu.no-spam.invalid (Earl Eiland)
Date: Sat, 9 Apr 2005 19:22:30 +0000 (UTC)
Subject: There's GOT to be a better way!
References: <mailman.3321.1109886650.22381.python-list@python.org>
Message-ID: <d39a1l$p4n$1@domitilla.aioe.org>

On Thu, 2005-03-03 at 16:43, Steve Holden wrote:
> Earl Eiland wrote:
> On Thu, 2005-03-03 at 15:11, Steve Holden wrote:
> 
> Earl Eiland wrote:
> 
> I'm writing my first program where I call custom modules.  The
'global'
> command doesn't seem to apply, so how do I change a variable
internally
> in a module without passing it down n layers, and then back out
again?
> 
> 
> You are correct in assuming that global isn't what you want - it
really
> means "global to the module namespace in which it appears".
> 
> However, if two separate pieces of code can both reference the same
> module then one can set an attribute in the module and the other can
> reference it. Don't forget that when you import a module its name
> becomes global within the importing module. Since a module is just a
> glorified namespace, anything that can reference the module can read
> and/or set that module's attributes.
> 
> a.py:
> 
> import something
> something.x = "A value"
> 
> b.py:
> 
> import something
> print something.x
> 
> will print "A value" as long as a is imported before b.
> 
> Right.  That part I figured out.  How does one function in an
imported
> module access a variable in the same module?
> 
> module.py
> 	def A():
> global test
> 		test = 1
> 		for x in range(10): B()
> 	
> 	def B():
> global test
> 		test = test + 1
> 
> 
> main.py
> 	import module
> 	module.A()
> print module.test
> 
> 
> This will fail, unless test is passed and returned.
> 
> I thought I tried that, and it didn't work.  I must have made some
other
mistake.

Thanks.



From kay.schluehr at gmx.net  Mon Apr 18 00:48:47 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 17 Apr 2005 21:48:47 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<4262e25b.207992156@news.oz.net>
Message-ID: <1113799727.299053.138010@f14g2000cwb.googlegroups.com>

Bengt Richter wrote:
> On 17 Apr 2005 09:27:34 -0700, "Kay Schluehr" <kay.schluehr at gmx.net>
wrote:
>
> >> Exactly. Except the above example is from the day-old-bread
> >items-tuple-returning version of :: ;-)
> >> And with an ordered dict subtype there is no need for the
generator
> >expression either,
> >> since there is a values method for dicts (which in the subtype
would
> >preserve order). E.g.,
> >>
> >>  x = property(*seq) where:
> >>              seq = (::
> >>                  def get_x():
> >>                      return self.__x
> >>                  def set_x(value):
> >>                      self.__x = value
> >>                  del_x = None
> >>                  doc   = "I'm the 'x' property." ).values())
> >>
> >> Or more directly:
> >>
> >>  x = property(*(::
> >>                  def get_x():
> >>                      return self.__x
> >>                  def set_x(value):
> >>                      self.__x = value
> >>                  del_x = None
> >>                  doc   = "I'm the 'x' property." ).values())
> >
> >Hmmm ... now You eliminate "where" completely in favor for '::'.
This
> >may be reasonable because '::' is stronger and less context
dependent.
> >But on the other hand it may be also reasonable to eliminate '::'
> >towards a stronger "where" ;)
> >
> >
> >x = property(**kw) where kw:
> >            doc = "I'm the 'x' property."
> >            def fget(self):
> >                return self.__x
> >
> >
> >x = property(*args) where args:
> >            def fget(self):
> >                return self.__x
> >            fset = None
> >            fdel = None
> >            doc = "I'm the 'x' property."
> >
> I like this. But how would you put "where args:" and "where kw:" if
you needed both?
> also, is it looking back to see the '*' or '**' to do (::x=1).values
vs. (::x=1)
> and how about (::x=1).keys() or (::x=1).items() ? And what if you
wanted to pass
> (::x=1) as a dict object without ** expansion into a keyword dict?
>
> Maybe we need asterisks on both ends. e.g.,
>
>     foo(dct, values, *args, **kw):
>        where **dct:
>           x=1
>        where *values:
>           x=2
>        where *args:
>           x=3
>        where **kw:
>           x=4

Yes... Why not?

>
> But that still doesn't give you, e.g.,
>
>        foo(keys) where:
>            keys=sorted((::
>                from interesting.module import *
>            ).keys())

This particular statement won't work anyway inside a where-clause
because
"from *" must be called from module level. You would have to import
interesting.module before:

        import interesting.module
        foo(keys) where:
            keys = sorted(interesting.module.__dict__).keys()

But it wasn't ever intended to put arbitrary statements in a kw-suite,
right?

> I like clean sugar, but I still want to be able to
> get at the general primitives to compose them in ways
> that can't be anticipated until a use case comes up.
> And then if the primitives are inaccessible, one is
> out of luck or doomed to workaround hacking ;-)

You can always consider "where" as function of a statement. The only
restriction You have to make is to bind "where" to a function-call i.e.
regard each function as a function object with a where() method.


f(*args,**kw ).where( <specifier>,
                        (<assignment-statement>|
                         <function-definition>|
                         <class-definition>)*
                    )

But that is not a loss of generality because a free (:: x=1 ) can be
mapped onto

  dict(**kw).where(**kw, x=1)

and that is

  dict(**kw) where **kw:
       x=1

I don't see any case where this translation fails. Only if it comes to
functional composition like

  f(g(...(h(:: x=1)...))

it may be awkward to expand this into a nested where clauses. You might
probably define the argument not in a suite ;)

Regards,
Kay



From peter at engcorp.com  Tue Apr  5 09:16:02 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 09:16:02 -0400
Subject: Placing Toplevel over the parent ?
In-Reply-To: <4252492b$0$5839$9a6e19ea@news.newshosting.com>
References: <4252492b$0$5839$9a6e19ea@news.newshosting.com>
Message-ID: <F6idnRebaJ0PEs_fRVn-2g@powergate.ca>

Pete Moscatt wrote:
> When calling a dialog box using the Toplevel widget, how do I place it over
> the calling parent ?
> 
> Currently when I call the dialog it appears to the side of the calling
> parent.

What framework?  What versions?  What platform?

-Peter


From mage at mage.hu  Wed Apr 20 08:08:31 2005
From: mage at mage.hu (Mage)
Date: Wed, 20 Apr 2005 14:08:31 +0200
Subject: goto statement
In-Reply-To: <d45gap$elj$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
Message-ID: <4266463F.7010009@mage.hu>

Maxim Kasimov wrote:

> WOW, just greate! ... but i'd like to relax at some more interesting
> way than to comment each of rows
>
There are editors that can comment and uncomment blocks.

In worst case you can use """ to comment blocks (not elegant but works).

       Mage


From bill at noreboots.com  Tue Apr 12 05:25:48 2005
From: bill at noreboots.com (Bill Anderson)
Date: Tue, 12 Apr 2005 03:25:48 -0600
Subject: zlib and zipfile module in Python2.4
References: <425a8caf$1_1@127.0.0.1>
Message-ID: <pan.2005.04.12.09.25.44.70463@noreboots.com>

On Mon, 11 Apr 2005 10:38:37 -0400, Alan Toppen wrote:

> I was unable to use the ZipFile class in the zipfile module in
> Python2.4. I got an error that zlib could not be found. Comparing my
> Python 2.2 installation I noticed Python 2.4 was missing a certain file:
> /usr/lib/python2.2/lib-dynload/zlibmodule.so. Unable to find a more
> elegant solution, I copied the file from my Python 2.2 directory into my
> Python 2.4 directory. When running my Python script it gives a warning:
> 
> /usr/local/lib/python2.4/zipfile.py:7: RuntimeWarning: Python C API
> version mismatch for module zlib: This Python has C API version 1012,
> module zlib has version 1011.
>   import zlib # We may need its compression method
> 
> But it works. Python 2.2 and 2.3 handle zipfiles out of the box. Could a
> file have been omitted from Python 2.4 by accident?

If you built it you should check for the zlib development headers. If they
are not, zlib will not be built.

I recently had this issue and discovered that if zlib headers are not
there, python still builds gzip ... which imports zlib. Seems to me that
since zlib apparently depends on gzip, gzip should only be built if zlib
is.

Cheers,
Bill


From jimmy at retzlaff.com  Tue Apr 12 18:00:01 2005
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Tue, 12 Apr 2005 15:00:01 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F380B22@MAYOR.retzlaff.com>

Terry Reedy wrote:
> I guess I don't understand some people's determination to not have
users
> install fully useable Python on their Windows machines.  Doing so
seems no
> different to me than having to install (or upgrade) Shockwave, or
Apple's
> Quicksomething for Windows (not used so much anymore), or RealPlayer,
or
> the lastest upgrade for DirectX, or DivX, or a zip decoder, or any
other
> 3rd party software, to run .xxx files or specialized .exe programs.
(And
> I left out the most direct analogy of a java system.)

The Windows application that I develop and distribute relies on Python
plus 14 other packages (wxPython, pywin32all, ctypes, Numeric, PIL,
etc.). My customers typically install the application on 20-100 user
machines within their organization at one time so it's mandatory that I
make an automated silent installer available. That's a lot easier to do
with py2exe and a Windows installer than it is to do with Python's MSI
and 14 other packages. It's also more robust - the installer is much
simpler and my application is always used with exactly the same Python
environment that was used for QA.

There are also significant hurdles to clear before software can be put
on user machines in an organization like this. The reviews with the IT
groups go much more smoothly since I can state that my installer will
only write files to one folder of the IT group's choosing, put an icon
in the Start Menu, and will only touch the registry to register an
uninstaller. If there were 15 installers being run (even if automated)
we'd have to review each of those individually and my product would
almost never be approved.

I don't actively hide the fact that I use Python, but my customers are
rarely interested in my toolbox - they are too focused on their own
business. Some groups will ask what language I use, and the following
question will always be something like "If we need it to, can it
interact with Java?" or C# or ...  that's their only interest in the
language I use. If they open themselves up by asking then I can't help
but badger them with the virtues of Python for a while. :)

> To put it another way, needing a Python interpreter to run .py files
is no
> different from, for instance, needing a movie player to run .mpg
files,
> and all Windows users are or need to become familiar with that general
> concept.

Many of my users don't have a concept of a "file" unless it's something
they ask their assistant to get from a cabinet. They are typically
corporate executives for very big companies and if they have a computer
problem then a team of IT people get paged to fix it immediately. They
don't "need" to become familiar with anything on a computer - their job
is managing many billions of dollars worth of business every year. They
can use almost every feature of my application if they can move the
mouse and click the left button. That requires training for some of
them, and I feel honored they'll take the time to learn that much in
order to use my software.

> Also, I think it a bit 'anti-social' to hide usage of Python.  If all
> Python Windows programs ran with a normal, communally installed
Python,
> then users would gradually get the idea that having Python installed
is
> much like having Shockwave and other utility platforms installed, and
that
> is is part of a 'fully loaded' Windows system to have a .py player
> installed.

I feel the opposite. I've skipped evaluating a number of applications
because they didn't come with their own dedicated JVM. I've spent way
too much of my own time trying to use applications with conflicting JVM
requirements only to give up in the end. It's just a new form of DLL
hell.

As a user, I only want to think about how well an application does what
I need it to do. The more time I spend dealing with supporting
technologies, the less time I spend on the intended task.

> If there is something about the default install of Python on Windows
that
> makes it less desireable or less easy than other platforms, then maybe
> that can be fixed.

Something like Flash is quite special purposed and you don't have tons
of large extension modules that are in common use. You just use the base
system and it is very tightly controlled by one organization to maintain
backwards compatibility. And it is primarily used to augment/replace
HTML pages, so you don't want to download/install the engine each time
you come across another page with Flash content. Applications are
different, you acquire them once and use them over and over and the
runtime environment is much more variable from app to app. You don't
just have to worry about the backward compatibility of Python itself,
but of every extension module in common use and all the combinations
that arise out of that. Again look at the pain of shared JVM use. I
think Microsoft is on the right track to addressing DLL hell now by
recommending that DLLs be installed in the application folder, not the
system folder. That's analogous to using application specific JVMs and
things like py2exe or cx_freeze for Python.

> To make installation easier, maybe someone could write a
> small .exe that could be frozen with scripts or run with installers
and
> that would detect the presence/absence of the needed Python version
and
> offer an auto download and install if needed.

My users only get access to "approved" sites (nothing else shows up in
their DNS). It's hard enough to get my own domain added to the ordained
list, much less a long list like python.org, sourceforge.net,
effbot.org, etc.

All this isn't just for my clients. I have a number of automated
processes that I run on my server that are written in Python. When I
need a new version of some module for one of those processes, I don't
want to spend the time testing it with each of the others to make sure
it didn't break anything. So I build single file executables from my
Python scripts so they are completely self-contained. When I want to
modify a module, then I can test/correct the impact of any new modules
at that point since I'll be in the code anyway. Before I started doing
this, the version of Python and the various extension modules in use on
my server was a couple of years older than the version on my development
machine because I almost never upgraded for fear of breaking several
processes.

Hard drive space is cheap and building exes is easy and I like the
benefits.

Jimmy

p.s. - on the original topic of this thread - I also buy development
tools from Microsoft that ensure I have the right to distribute the
needed DLLs so it's not a concern in my case.


From fabio.pliger at siavr.it  Fri Apr 29 08:45:09 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Fri, 29 Apr 2005 12:45:09 GMT
Subject: Best way to create temporary file?
References: <246a4e07.0504290311.7d692401@posting.google.com>
Message-ID: <p%pce.71049$IN.1224311@twister2.libero.it>


"Frank Millman" <frank at chagford.com> ha scritto nel messaggio
news:246a4e07.0504290311.7d692401 at posting.google.com...
> Hi all
>
> I need to generate potentially large reports from a database, and I
> want to offer the option of print preview before actually printing
> (using wxPython). I figure that the best way to achieve this is to
> write the report to a temporary file, or more likely to a temporary
> directory with a separate file for each page. I can use that for
> previewing and for printing, and then delete the file/directory.
>
> There seems to be a few ways to achieve this, and I am not sure of the
> best way.
>
> 1. I can call tempfile.TemporaryFile() for each file required.
>
> 2. I can call tempfile.mkdtemp() to create a temporary directory, and
> create each file manually.
>
> 3. I can call os.tmpfile() for each file required.
>
> After creating the files, I need to re-read them, either one at a time
> in sequence (if printing), or any one at random (if previewing a
> particular page). This makes me lean towards method 2.
>
> With this method, I create the files manually, so I can name them
> according to their page numbers, which makes it easy to open and close
> them as required. The other two methods return open file objects, so
> it seems that I cannot close them, as there would be no means of
> accessing their contents subsequently. Therefore I would have to
> maintain a list of open file objects, use indexing to retrieve a
> particular page, and then perform seek(0) before I could read it. A
> slight downside of method 2 is that I have to delete the files and the
> directory manually when I have finished.
>
> I have two additional questions regarding method 3.
>
> Firstly, I am not sure how it works. The docs say that the file has no
> directory entries associated with it, and it will be automatically
> deleted when there are no file descriptors for the file. What does
> this mean? Does it create a physical file, or is it stored in memory?
> If the latter, could I run into memory problems if I create a report
> with hundreds of pages?
>
> Secondly, I can create the file using FC3 (Python 2.4), but if I try
> on Windows 2000 (Python 2.4) I get the message 'OSError: Permission
> denied', even though I am a member of the Administrators group.
>
> Any advice on the best approach for this will be much appreciated.
>
> Frank Millman


 Why create an intermediate file to preview with wxPython? I would just
preview the data with wx and keep it inside your application. If you want to
print it just print... avoid temp file creation if it's not necessary... :)

F.P.




From fuzzyman at gmail.com  Wed Apr 20 04:22:07 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 20 Apr 2005 01:22:07 -0700
Subject: Python Google Server
In-Reply-To: <mailman.1990.1113608931.1799.python-list@python.org>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<7x7jjhw7ro.fsf@ruckus.brouhaha.com>
	<1112717390.981837.39400@l41g2000cwc.googlegroups.com>
	<mailman.1990.1113608931.1799.python-list@python.org>
Message-ID: <1113985327.561550.213260@o13g2000cwo.googlegroups.com>

Thanks Benji,

It returns the results using an ip address - not the google domain.
This means IPCop bans it :-(

Thanks for the suggestion though. In actual fact the googleCacheServer
works quite well.

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python/weblog



From ivanlan at pauahtun.org  Fri Apr  1 17:21:24 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Fri, 01 Apr 2005 15:21:24 -0700
Subject: Pseudocode in the wikipedia
Message-ID: <424DC964.5A3D03FA@pauahtun.org>

Hi All--

Jeremy Bowers wrote:

> Your ass is your identity function.
> 
> Python 2.3.5 (#1, Mar  3 2005, 17:32:12)
> [GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> 25
> 25
> >>> (_ | _)
> 25
> >>>
> 
> There's clearly some interesting biometrics research to be done here,
> although there is a well-known ass-capturing attack based on readily
> commercially available machines from Xerox that might make it hard to make
> an ass-based identity system resistant to attacks.

http://www.jacquelinestallone.com/rumps.html

Metta,
Ivan

PS:  I don't think this is an 0401 page; it's been there a while.
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From gigi-s at bigfoot.com  Fri Apr 22 03:10:49 2005
From: gigi-s at bigfoot.com (Gigi)
Date: Fri, 22 Apr 2005 00:10:49 -0700
Subject: How to get a Function object from a Frame object
In-Reply-To: <3cm889F6lms8sU1@individual.net>
References: <mailman.2054.1113843979.1799.python-list@python.org>	<nYWdnTAtyqHqbv7fRVn-hg@comcast.com>
	<3cm889F6lms8sU1@individual.net>
Message-ID: <4268A379.1090205@bigfoot.com>

Greg Ewing wrote:
> Steven Bethard wrote:
> 
>> Gigi wrote:
>>
>>> I need access to a function object that corresponds to a frame object 
>>> in a certain case from inside the function.
>>
>>
>> Can you look up the code's co_name in the previous frame's locals?
>>
>> You probably also need to check the previous frame's globals...  And 
>> there are probably some cases where this code still wouldn't work...
> 
> 
> Note that in general it's impossible to tell exactly
> which function object was involved, since there could
> be more than one function object sharing the same code
> object, and the frame only references the code object.
> 

I can get the co_name and everything that's available from the code 
object. However, I can't get to the actual function object. I need the 
function object to get a custom function attribute that was injected 
earlier as context. I didn't know that code objects could be shared. I 
guess it really makes the whole thing impossible, unless the code object 
kept a list of all the functions that share it. Thanks, anyway. I found 
a different solution.



From dcrespo at gmail.com  Fri Apr 22 17:26:16 2005
From: dcrespo at gmail.com (dcrespo)
Date: 22 Apr 2005 14:26:16 -0700
Subject: PDF Printing support from Python
In-Reply-To: <1114202411.647429.290030@o13g2000cwo.googlegroups.com>
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<1114202411.647429.290030@o13g2000cwo.googlegroups.com>
Message-ID: <1114205176.036101.153560@o13g2000cwo.googlegroups.com>

Thanks a lot... I'm attemping to give it a try :)



From beliavsky at aol.com  Mon Apr  4 17:43:22 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 4 Apr 2005 14:43:22 -0700
Subject: TOC of Python Cookbook now online (was Re: author index for
	Python Cookbook 2?)
References: <pan.2005.03.28.22.57.26.701125@dalkescientific.com>
	<1112088046.319458.283220@o13g2000cwo.googlegroups.com>
	<mailman.1000.1112088412.1799.python-list@python.org>
	<1112198902.605404.233130@l41g2000cwc.googlegroups.com>
	<1112211408.135697.223430@o13g2000cwo.googlegroups.com>
	<88n2515ki5j1b251uvak5s3dg769mtfvua@4ax.com>
Message-ID: <1112651002.314040.140910@l41g2000cwc.googlegroups.com>

robin wrote:
> beliavsky at aol.com wrote:
>
> >I emailed the O'Reilly webmaster, and the table of contents are now
> >online at http://www.oreilly.com/catalog/pythoncook2/toc.html and
also
> >listed below.
>
> Unfortunately there is no list of authors for the sections in the
> book. This is likely its only shortcoming!
>
> -- robin

I have found the site http://aspn.activestate.com/ASPN/Python/Cookbook/
, which has the code for 1142 recipes, with the names of authors
listed.



From bearophileHUGS at lycos.com  Fri Apr 29 07:17:14 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 29 Apr 2005 04:17:14 -0700
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <du7hdhpc0rs.fsf@amadeus.cc.tut.fi>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
	<du7hdhpc0rs.fsf@amadeus.cc.tut.fi>
Message-ID: <1114773434.838285.279040@g14g2000cwa.googlegroups.com>

Ville Vainio:
> This is a good place to use 'get' method of dict:
> frequency[word] = frequency.get(word,0) + 1

I think Kent Johnson is longer, but a bit faster...

Bye,
Bearophile



From vze4rx4y at verizon.net  Tue Apr  5 19:34:47 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Tue, 05 Apr 2005 23:34:47 GMT
Subject: Propagating poorly chosen idioms
References: <mailman.1398.1112721652.1799.python-list@python.org>
Message-ID: <rgF4e.6094$7b.3817@trndny01>

[Skip Montanaro]
> This reminded me of something I noticed awhile ago.  If you're learning
> something new, there is a tendency to find a working example to start from,
> then modify it to suit your needs.  This is fine as far as it goes, however,
> if the idioms used in the code you're cloning are suboptimal, they get
> cloned.
>
> Unittest's API is difficult enough for me to remember (at least the initial
> framework I need to put together) that I generally hunt down some previous
> unittest usage, clone it and start from there.  I no longer have any idea
> what the original unittest example was that got me started using it in the
> first place (probably something in the distro's docs).  I can only hope it
> was a good example.

If it was the distro or tutorial example, I hope you thought it was good.

I added those examples to the docs with the intention facilitating
cut-and-paste jobs so folks could get up and running quickly.

The remainder of the unittest docs are somewhat obtuse and uninspiring.



> >From that standpoint the simpler API of py.test seems attractive.

That is their number one selling point.  I hope they don't lose it as the
package evolves to include doctests and such.



Raymond Hettinger




From nospam at here.com  Wed Apr 27 11:18:18 2005
From: nospam at here.com (Matt Feinstein)
Date: Wed, 27 Apr 2005 11:18:18 -0400
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <n4bv619cmjhm05d8jl4h0ukrh5orrcksen@4ax.com>

On Wed, 27 Apr 2005 21:16:29 +0800, "monkey" <m at m.com> wrote:

>Read through python site for programming tool, really plenty of choices :-)
>(For c++, I just can't breath with very very limited choices)
>
>Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
>develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
>also worth looking. Actually which one are you guys using? and why? I think
>it is also valuable for those who are new to python as me.

If you intend to use Python for Matlab-like calculations with
numerical arrays and plotting with Matplotlib, then ipython is the
right choice-- it has a special 'pylab' mode that is Matplotlib-aware,
allowing you to make plots interactively (as well as various other
useful features).

Matt Feinstein

--
There is no virtue in believing something that can be proved to be true.


From sandygarg at gmail.com  Thu Apr 14 03:33:16 2005
From: sandygarg at gmail.com (sandygarg at gmail.com)
Date: 14 Apr 2005 00:33:16 -0700
Subject: Printable version of Python tutorila
In-Reply-To: <mailman.1878.1113463171.1799.python-list@python.org>
References: <1113462420.862936.132780@g14g2000cwa.googlegroups.com>
	<mailman.1878.1113463171.1799.python-list@python.org>
Message-ID: <1113463996.405586.65920@l41g2000cwc.googlegroups.com>

Thanks a lot...
I've foolishly WGETed the entire python.org.



From ivoras at _-_fer.hr  Sat Apr 16 11:01:39 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Sat, 16 Apr 2005 17:01:39 +0200
Subject: XML parsing per record
In-Reply-To: <42611686$0$148$e4fe514c@news.xs4all.nl>
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<42611686$0$148$e4fe514c@news.xs4all.nl>
Message-ID: <d3r9cv$h5l$1@bagan.srce.hr>

Irmen de Jong wrote:

> XML is not known for its efficiency....

<sarcasm> Surely you are blaspheming, sir! XML's the greatest thing 
since peanut butter! </sarcasm>

I'm just *waiting* for the day someone finds its use on the rolls of 
toilet paper... oh the glorious day...



From mefjr75 at hotmail.com  Fri Apr 29 15:31:22 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 29 Apr 2005 12:31:22 -0700
Subject: Trying to write CGI script with python...
In-Reply-To: <mailman.9.1114734748.14961.python-list@python.org>
References: <mailman.9.1114734748.14961.python-list@python.org>
Message-ID: <1114803082.851505.149730@o13g2000cwo.googlegroups.com>

Just  in case you don't have a clue what they are talking about ;)
import traceback
try:
    #your stuff here
except:
    traceback.print_exc()

That should return any exceptions you may be throwing.



From fredrik at pythonware.com  Thu Apr 21 12:49:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 18:49:58 +0200
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com><mailman.2159.1113989175.1799.python-list@python.org><d45cun$ec3$1@news.tsystems.kiev.ua><mailman.2162.1113995666.1799.python-list@python.org><42664190.6010507@i.com.ua><mailman.2164.1113998230.1799.python-list@python.org><d45gap$elj$1@news.tsystems.kiev.ua><87vf6hlkix.fsf@wilson.rwth-aachen.de><d45kna$f1o$1@news.tsystems.kiev.ua><N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
	<42666097.3040405@i.com.ua><1114100669.807737.192320@l41g2000cwc.googlegroups.com>
	<d48la8$onm$1@news.tsystems.kiev.ua>
Message-ID: <d48lb8$48a$1@sea.gmane.org>

Maxim Kasimov wrote:

> how do use this here:

are you still claiming you're not a troll?

*plonk*

</F>



From austin at maxtronic.com.tw  Wed Apr  6 03:38:43 2005
From: austin at maxtronic.com.tw (Austin)
Date: Wed, 6 Apr 2005 15:38:43 +0800
Subject: How to detect windows shutdown
Message-ID: <d303gk$btk$1@netnews.hinet.net>

I wrote a program running on windows.
I put the link of the program in "Start up" folder and let it executed 
minimized.
Every time when I open the computer, my program will be running in system 
tray.

But if the user would like to shutdown the computer, the OS will show an 
error about exception.

At first, I think windows will terminate all processes when it shutdown.
So, if python has the way to dectect shutdown process, I can kill the 
process in advance.

Thanks a lot. 




From bob_then at yahoo.com.au  Mon Apr  4 19:34:34 2005
From: bob_then at yahoo.com.au (Bob Then)
Date: Tue, 5 Apr 2005 09:34:34 +1000
Subject: change extensions
Message-ID: <4251cef9@dnews.tpgi.com.au>

how can i change all files from one extension to another within a direcory?




From ruach at chpc.utah.edu  Fri Apr 22 16:58:38 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 22 Apr 2005 14:58:38 -0600
Subject: rudeness    was:  Python licence again
In-Reply-To: <mailman.2308.1114200498.1799.python-list@python.org>
References: <mailman.2308.1114200498.1799.python-list@python.org>
Message-ID: <d4boi0$8dl$1@vegh.ks.cc.utah.edu>

Michael.Coll-Barth at VerizonWireless.com wrote:
> Laszlo,
> 
> 
>>>>Is it something like 'center' or 'color' for Americans and 'centre' or
> 
> 'colour' for British people?
> 
> Yes, exactly.  
> 
> 
>>>>(Sorry to be offtopic)
> 
> 
> No need to apologize.  I started to read the postings on this list and was
> dismayed at the depth of rudeness on here.  I thought that pythonistas might
> be a little more patient/tolerant.  I guess I was wrong.  I understood
> exactly what you wanted to say, I just didn't have an answer.  I did find it
> amusing that the person who incorrectly corrected you, was in fact,
> incorrect.  
> 

This is a public list so any one is able to post, rude or otherwise. I
read this list often--though not as often as some :) --and have not
found that rudeness generaly describes the behavior of most posters, esp
the regulars.

Please don't let the voices of a few rebels stereotype, in your mind,
the attitude of the python community.

-Matthew


From sjmachin at lexicon.net  Sat Apr 30 20:29:03 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 01 May 2005 10:29:03 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>
	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>
	<d4vn0s$i3b$1@gemini.csx.cam.ac.uk>
	<fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>
	<d501b0$9af$1@gemini.csx.cam.ac.uk>
Message-ID: <dl48715f2aciv9ngt1flnggc82v0uubnjo@4ax.com>

On Sat, 30 Apr 2005 14:31:08 +0100, Michael Hoffman
<cam.ac.uk at mh391.invalid> wrote:

>John Machin wrote:
>
>>>>>That's nice. Well I agree with you, if the OP is concerned about embedded
>>>>>CRs, LFs and ^Zs in his data (and he is using Windows in the latter case),
>>>>>then he *definitely* shouldn't use fileinput.
>>>>
>>>>And if the OP is naive enough not to be concerned, then it's OK, is
>>>>it?
>>>
>>>It simply isn't a problem in some real-world problem domains. And if there
>>>are control characters the OP didn't expect in the input, and csv loads it
>>>without complaint, I would say that he is likely to have other problems once
>>>he's processing it.
>> 
>> Presuming for the moment that the reason for csv not complaining is
>> that the data meets the csv non-spec and that the csv module is
>> checking that: then at least he's got his data in the structural
>> format he's expecting; if he doesn't do any/enough validation on the
>> data, we can't save him from that.
>
>What if the input is UTF-16? Your solution won't work for that. And there
>are certainly UTF-16 CSV files out in the wild.

The csv module docs do say that Unicode is not supported.

This does appear to work, however, at least for data that could in
fact be encoded as ASCII:

>>> import codecs
>>> j = codecs.open('utf16junk.txt', 'rb', 'utf-16')
>>> rdr = csv.reader(j, delimiter='\t')
>>> rows = list(rdr)

The usual trick to smuggle righteous data past the heathen (recode as
UTF-8, cross the border, decode) should work. However the OP's data is
coming from an MF, not from Excel "save as Unicode text" (which
produces a tab-delimited .txt file -- how do you get a UTF-16 CSV
file?) and if it's not in ASCII it may have a bit more chance of being
in EBCDIC than UTF-16 -- unless MFs have come a long way since I last
had anything to do with them :-)

In any case, my "solution" was a sketch, and stated to be such. We
don't know, and I suspect the OP doesn't know, exactly (1) what
encoding is being used (2) what the rules are about quoting the
delimiter, and quoting the quote character. It's very possible even if
it's encoded in ASCII and the delimiter is a comma that the quoting
system being used is not the expected Excel-like method but something
else and hence the csv module can't be used.

>
>I think at some point you have to decide that certain kinds of data
>are not sensible input to your program, and that the extra hassle in
>programming around them is not worth the benefit.

I prefer to decide at a very early point what is sensible input to a
program, and then try to ensure that nonsensible input neither goes
unnoticed nor crashes with an unhelpful message.

>
>> There is also an "on principle" element to it as well -- with
>> fileinput one has to use the awkish methods like filelineno() and
>> nextfile(); strikes me as a tricksy and inverted way of doing things.
>
>Yes, indeed. I never use those, and would probably do something akin to what
>you are suggesting rather than doing so. I simply enjoy the no-hassle
>simplicity of fileinput.input() rather than worrying about whether my data
>will be piped in, or in file(s) specified on the command line.

Good, now we're singing from the same hymnbook :-)



From mage at mage.hu  Sun Apr 10 15:46:03 2005
From: mage at mage.hu (Mage)
Date: Sun, 10 Apr 2005 21:46:03 +0200
Subject: hello
Message-ID: <4259827B.7010302@mage.hu>

        Hello,

I started learning python 2 days ago because the pgsql / plperl is
buggy. I think I will love it and I will use it not only for stored sql
procedures but also for fun. The only bad thing I found so far is that
the tutorial is full of "while True... break".

Of course I like John Cleese and Monty Python too.

So hi everyone.

       Mage






From steven.bethard at gmail.com  Sun Apr 17 22:41:21 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 17 Apr 2005 20:41:21 -0600
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
In-Reply-To: <1113755254.226237.138550@z14g2000cwz.googlegroups.com>
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
Message-ID: <CoOdnZbRee_Mg_7fRVn-rQ@comcast.com>

Kay Schluehr wrote:
> Hmmm ... now You eliminate "where" completely in favor for '::'. This
> may be reasonable because '::' is stronger and less context dependent.
> But on the other hand it may be also reasonable to eliminate '::'
> towards a stronger "where" ;)
> 
> x = property(**kw) where kw:
>             doc = "I'm the 'x' property."
>             def fget(self):
>                 return self.__x
> 
> 
> x = property(*args) where args:
>             def fget(self):
>                 return self.__x
>             fset = None
>             fdel = None
>             doc = "I'm the 'x' property."
[snip]
> I think this version is more mainstream syntax ( and without braces and
> additional punctuation ) than the unary prefix operator '::' which
> drops statements into expressions within expressions.

So the object of a "where" is then always an ordered dict?  If so, then 
I guess I like this proposal best so far.

However, it does seem to have the problem that you can't have any 
additional local variables so, for example, list comprehensions are 
probably not usable...

Or can you still drop the argument to "where" and just use the names 
directly?  E.g.:

x = property(fget=fget, doc=doc) where:
     doc = "I'm the 'x' property."
     def fget(self):
         return self.__x

STeVe


From ptmcg at austin.rr.com  Thu Apr 21 12:06:43 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 21 Apr 2005 09:06:43 -0700
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <mailman.2235.1114098946.1799.python-list@python.org>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
	<mailman.2235.1114098946.1799.python-list@python.org>
Message-ID: <1114099603.516710.150680@z14g2000cwz.googlegroups.com>

I'd be very interested to see if there actually is a benchmark suite
for regexp's.  I imagine that this could be an easy area for quite a
varied set of results, depending on the expression features included in
the actual regexp being tested, and even the nature of the input text.
For example, a simple re that just scans for words in a text stream may
perform very differently from one that searches for delimited text, has
to lookahead for greedy matches, maintains return groups, performs
named substitutions, etc.

Without a pretty thorough benchmark suite, I would be dubious of
performance claims being very much better than anecdotes.

-- Paul



From ajikoe at gmail.com  Tue Apr 26 01:34:13 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 25 Apr 2005 22:34:13 -0700
Subject: create python process
Message-ID: <1114493653.057561.96260@o13g2000cwo.googlegroups.com>

Hello,

I would like to create python processes instead of thread.
Can anyone give me an example or site which shows a tutorial about how
to create processes ?

Sincerely Yours,
Pujo



From nick at craig-wood.com  Tue Apr 19 09:30:06 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 19 Apr 2005 13:30:06 GMT
Subject: Memory leak in python
References: <mailman.2092.1113911901.1799.python-list@python.org>
Message-ID: <slrnd69vfm.51r.nick@irishsea.home.craig-wood.com>

Abhishek S <abhishek216 at yahoo.com> wrote:
>  I am seeing that the python application is very slowly
>  eating up the memory. i need help to indentify it.
> 
>  It start with 11MB and keeps growing by 1 MB around
>  every 30mins.
> 
>  #top | grep python
>  10351 root      15   0 26584  25M  3896 S     0.5  0.8  46:05   1 python2
[snip]
>  10351 root      15   0 26688  26M  3896 S     2.1  0.8  46:45   1 python2

Thats not a lot of leak - have you done that over a longer time
period?

>  let me know how to approch this.  gc.collect - does not collect
>  anything.

Are there any objects in gc.garbage?

Are you writing objects with __del__ methods?  If so then that is your
problem probably.

Have you written any extension modules in C?

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


From tiissa at nonfree.fr  Mon Apr 18 16:01:09 2005
From: tiissa at nonfree.fr (tiissa)
Date: Mon, 18 Apr 2005 22:01:09 +0200
Subject: fpectl
In-Reply-To: <1113843289.303006.186530@l41g2000cwc.googlegroups.com>
References: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
	<1113843289.303006.186530@l41g2000cwc.googlegroups.com>
Message-ID: <42641204$0$19344$626a14ce@news.free.fr>

Matt wrote:
> S?bastien Boisg?rault wrote:
>>My platform is Linux (Mandrake 10.x)
>>
> I'm assuming that means you can't use it on a Windows platform
> 
It's harsh to say Mandrake is a Windows platform. ;o)


From tsilande at hiit.fi  Tue Apr  5 17:19:32 2005
From: tsilande at hiit.fi (Tomi Silander)
Date: Tue, 05 Apr 2005 17:19:32 -0400
Subject: optparse and negative numbers as positional arguments
Message-ID: <115605ankljag93@corp.supernews.com>

Hi,
this must have been asked 1000 times (or nobody is as stupid as me),
but since I could not find the answer, here is the question.

My program mitvit.py:
--------------
import optparse
optparse.OptionParser().parse_args()
--------------
gives me

$ python2.4 ./mitvit.py -1.1
usage: mitvit.py [options]

mitvit.py: error: no such option: -1.1

How is one supposed to give negative numbers as positional arguments 
when using optparse?

ts.


From __peter__ at web.de  Wed Apr 20 05:01:28 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 20 Apr 2005 11:01:28 +0200
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
	<3cm9r2F6nif67U1@individual.net>
	<d44vgg$jmr$04$1@news.t-online.com> <42660fc2.42093557@news.oz.net>
Message-ID: <d455oo$7et$02$1@news.t-online.com>

Bengt Richter wrote:

> Parse might be a big word for
> 
>  >> def tupreq(fmt): return sum(map(lambda s:list(s).count('%'),
>  >> fmt.split('%%')))
>  ..
>  >> tupreq('%s this %(x)s not %% but %s')
> 
> (if it works in general ;-)

Which it doesn't:

>>> def tupreq(fmt): return sum(map(lambda s:list(s).count('%'),
fmt.split('%%')))
...
>>> fmt = "%*d"
>>> fmt % ((1,) * tupreq(fmt))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: not enough arguments for format string

> Or maybe clearer and faster:
> 
>  >>> def tupreq(fmt): return sum(1 for c in fmt.replace('%%','') if
>  >>> c=='%')
>  ...
>  >>> tupreq('%s this %(x)s not %% but %s')
>  3

Mixed formats show some "interesting" behaviour:

>>> "%s %(x)s" % (1,2)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: format requires a mapping
>>> class D:
...     def __getitem__(self, key):
...             return "D[%s]" % key
...
>>> "%s %(x)s" % D()
'<__main__.D instance at 0x402aaf2c> D[x]'
>>> "%s %(x)s %s" % D()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: not enough arguments for format string
>>> "%s %(x)s %(y)s" % D()
'<__main__.D instance at 0x402aad8c> D[x] D[y]'

That is as far as I got. So under what circumstances is 
'%s this %(x)s not %% but %s' a valid format string?

Peter



From theller at python.net  Fri Apr  1 13:01:59 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 01 Apr 2005 20:01:59 +0200
Subject: class attributes and inner classes in C extensions
References: <26f807b9d58f39d1ae191249a187caf4@upf.edu>
	<mailman.1189.1112372650.1799.python-list@python.org>
Message-ID: <k6nmidew.fsf@python.net>

harold fellermann <harold.fellermann at upf.edu> writes:

>> I am working on a C extension module that implements a bunch of
>> classes. Everything
>> works fine so far, but I cannot find any way to implement class
>> attributes or inner
>> classes. Consider you have the following lines of Python :
>>
>> class Foo :
>> 	class Bar :
>> 		pass
>>
>>      spam = "foobar"
>>
>> How can this class be translated to a C extension? Is there anything
>> comparable to
>> PyMethodDef that can be used for other attributes than functions?
>
> O.k. I found it out now, and in order to improve the knwoledge base of
> the mailing
> list, I will answer my question myself.
>
> The PyTypeObject structure has a field tp_dict that holds the
> dictionary of the class object. You can initialize it with a
> dictionary that holds class attributes.  If you provide a custom
> dictiomary, you must do so _before_ PyType_Ready() is called, because
> PyType_Ready adds other entries to this dictionary.

I think you could as well, after PyType_Ready() is called, set it
yourself with
  PyObject_SetAttrString(FooType, "Bar", FooBarType);

You *may* have to cast the FooType and FooBarType to (PyObject *), to
avoid compiler warnings.

Thomas


From artur_spruce at yahoo.com  Mon Apr 18 17:15:11 2005
From: artur_spruce at yahoo.com (AdSR)
Date: 18 Apr 2005 14:15:11 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<mailman.2063.1113856589.1799.python-list@python.org>
Message-ID: <1113858911.158287.166730@l41g2000cwc.googlegroups.com>

> if you think this is an "atrocity", maybe programming isn't for you.

My resume might suggest otherwise but I guess that's not the main topic
here. Maybe I got carried away -- this one took me completely by
surprise.

Anyway, this gets interesting:

def z(((a, b), (c, d)), (e, f)):
    pass

although I see that it could be perfectly valid in some contexts.

Cheers,

AdSR



From vze4rx4y at verizon.net  Wed Apr 13 00:09:06 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Wed, 13 Apr 2005 04:09:06 GMT
Subject: Python 2.4 killing commercial Windows Python development ?
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz>	<mailman.1724.1113261387.1799.python-list@python.org>	<1113264839.497914.210170@z14g2000cwz.googlegroups.com><425b8cf7$0$38043$bed64819@news.gradwell.net>
	<mailman.1740.1113297800.1799.python-list@python.org>
Message-ID: <CX07e.15622$nt3.11926@trndny04>

[Robin Becker]
> People have mentioned the older v6 build scripts/tools still work. Last time I
> tried they seemed a bit out of date.

I routinely use the current CVS to build Py2.4 and Py2.5 with MSC6.
It is effortless and I've had no problems.


Raymond Hettinger




From fuzzyman at gmail.com  Tue Apr  5 12:09:51 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Apr 2005 09:09:51 -0700
Subject: Python Google Server
In-Reply-To: <7x7jjhw7ro.fsf@ruckus.brouhaha.com>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<7x7jjhw7ro.fsf@ruckus.brouhaha.com>
Message-ID: <1112717390.981837.39400@l41g2000cwc.googlegroups.com>

The difficulty is 'on some other machine'... there's a fantastic python
CGI proxy called approx -
http://www.voidspace.org.uk/python/cgi.shtml#approx

The trouble is the current policy is 'whitelist only'... so I need the
proxy installed on a server that is *on the whitelist*... which will
take a little time to arrange.

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From mage at mage.hu  Sun Apr 24 14:10:26 2005
From: mage at mage.hu (Mage)
Date: Sun, 24 Apr 2005 20:10:26 +0200
Subject: Getting into Python, comming from Perl.
In-Reply-To: <426BDDB7.8010403@amplitudenet.pt>
References: <426BDDB7.8010403@amplitudenet.pt>
Message-ID: <426BE112.9050902@mage.hu>

Miguel Manso wrote:

>
>
> I've tryed to use python some times but I get frustrated very quick. I
> get myself many times needing to figure out how to loop through a
> list, declare an associative array, checking how to pass named
> parameters to functions, and simple things like that.

list = [3,5,9,11]
list.append(17)
for i in list:
    print i

foo = dict()
foo['bar'] = 7
foo['trooll'] = 'green'

for k,v in foo.iteritems():
    print k, v

def test(**args):
    for key in args.keys():
        print key, args[key]

test(a='apple', c='orange')

       Mage



From bogus@does.not.exist.com  Fri Apr 22 16:25:02 2005
From: bogus@does.not.exist.com ()
Date: Fri, 22 Apr 2005 20:25:02 -0000
Subject: (no subject)
Message-ID: <mailman.27.1572215809.3356.python-list@python.org>

#! rnews 2261
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: PDF Printing support from Python
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqxr7h2vaoo.fsf at cola2.ca.boeing.com>
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Sender: hgg9140 at cola2.ca.boeing.com
Organization: The Boeing Company
References: <1114191192.978923.268390 at f14g2000cwb.googlegroups.com> <116iihncpcr5057 at corp.supernews.com> <1114198703.935948.286720 at o13g2000cwo.googlegroups.com>
Mime-Version: 1.0
Date: Fri, 22 Apr 2005 20:05:59 GMT
Xref: news.xs4all.nl comp.lang.python:373861

"dcrespo" <dcrespo at gmail.com> writes:

> Hi Grant Edwards...
> 
> Your solution requires a previous installation of Acrobat. Internally,
> the OS is sending the pdf file to the Acrobat PDF Driver and then it is
> sent to the printer. So you have to have Acrobat installed. Don't you?
> I want to avoid it installing a module that could do it (maybe I'm
> dreaming:( ). If there's no solution, then I will be very sad :-S
> 
> This is what exactly I need to do:
> Generate an invoice of 216cm width and 93cm height (1/3 of the height
> of a letter paper size), and print it respecting these dimensions. So,
> when I print this page on a dot matrix printer, it stops at those 93cm
> of height for continuous printing.
> 
> What I tried:
> I created a pdf file manually with these dimensions, and right-click on
> the pdf file, and selected "print". It just work under Windows XP with
> Acrobat Reader 7.0, but I want to do it from a Win98 as well.
> Unfortunately, there's no Acrobat version under Win98 (the maximun is
> 5.1) that supports this kind of printing (what I had seen until now).
> It prints, but the all paper at letter size :(
> 
> Any help? Any other tools? Any one like Cristal Report but for Python?
> I heard that wxPython supports some kind of reporting, but I don't know
> it. Anyone knows?
> 
> Daniel
> 


When you say "OS", are you talking MS Windows by any chance?  On *NIX
(e.g., CUPS+ghostview+foomatic), PDF printing is not via Adobe code.

You could also consider pdf2ps, pdftops, and XPDF.


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From bokr at oz.net  Tue Apr  5 02:52:58 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 05 Apr 2005 06:52:58 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
	<mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
	<42506757.1010404@v.loewis.de>
	<e3s051p1dfqag3ph7h5f3292294lelk18p@4ax.com>
Message-ID: <4251fba7.328610657@news.oz.net>

On Mon, 04 Apr 2005 02:13:29 GMT, Ron_Adam <radam2 at tampabay.rr.com> wrote:

>On Sun, 03 Apr 2005 23:59:51 +0200, "Martin v. L?wis"
><martin at v.loewis.de> wrote:
>
>>Ron_Adam wrote:
>>> This would be the same without the nesting:
>>> 
>>> def foo(xx):
>>>     global x
>>>     x = xx
>>>     return fee
>>> 
>>> def fee(y):
>>>     global x
>>>     return y*x
>>> 
>>> z = foo(2)(6)
>>
>>Actually, it wouldn't.
>
>Ok, yes, besides the globals, but I figured that part is obvious so I
>didn't feel I needed to mention it.  The function call works the same
>even though they are not nested functions.

I am afraid that is wrong. But be happy, this may be the key to what ISTM
is missing in your concept of python functions ;-)

What you don't seem to grok is what the def statement really does.
When you compile a def statement, you code, but it's not principally the code
that runs when you call the function that is being defined.

When you compile a def statement, you get code that MAKES the function being defined,
from precompiled pieces (one of which is a code object representing the defined function)
and optionally code for evaluating default argument expressions. This becomes part of the
code generated by compiling the def statement. (Default argument value expressions are
the simplest examples).

When you work interactively as above, the interactive loop both compiles and executes
chunks as you go, so both your def foo and def fee would be compiled AND executed.

If you put def fee inside the body of foo, you get fee def-code inside the body of foo,
but it doesn't get executed, because foo hasn't been called yet, though the foo def
has been compiled and executed interactively (and thus the name foo is bound to
the finished foo function, ready to be called or otherwise used.

So, no, it does not "work the same." In fact, it is a misconception to talk about
a nested fee as if it existed ready to call in the same way as foo. It doesn't
exist that way until the fee def is EXECUTED, producing the callable fee.

It's something like the distinction between relocatable object files in C
representing a function and machine code  representing the function in a dll.
The execution of def is like a little make operation that links the function
pieces (and in the case of Python may dynamically generate some of the pieces
with arbitrarily complex code, including decorators etc).

def is hard to grok at first, if you're coming from languages that don't
do it Python's way.

We can use dis to see the above clearly:

Let's see what the difference in code is for a simple function
with the body

    fee = 'fee string'
    return fee

and the body

    def fee():
        return 'nested fee result'
    return fee

It's going to be returning whatever fee is either way, so what we need
to compare is how fee gets bound to something:

 >>> import dis
 >>> def foo():
 ...     fee = 'fee string'
 ...     return fee
 ...
 >>> dis.dis(foo)
   2           0 LOAD_CONST               1 ('fee string')
               3 STORE_FAST               0 (fee)

   3           6 LOAD_FAST                0 (fee)
               9 RETURN_VALUE

Now we'll look for what replaces
   2           0 LOAD_CONST               1 ('fee string')
               3 STORE_FAST               0 (fee)
when we do a simple nested function and return that:


 >>> def foo():
 ...     def fee():
 ...         return 'nested fee result'
 ...     return fee
 ...
 >>> dis.dis(foo)
   2           0 LOAD_CONST               1 (<code object fee at 02EF21E0, file "<stdin>", line 2>)
               3 MAKE_FUNCTION            0
               6 STORE_FAST               0 (fee)

   4           9 LOAD_FAST                0 (fee)
              12 RETURN_VALUE

Note the MAKE_FUNCTION. That is dynamically going to take its argument(s) -- in this case
what the single LOAD_CONST put on the stack -- and leave the now ready-to-call function
on the stack (as a reference, not the whole thing of course). Now we have the function
reference instead of a reference to the string 'fee string' in the first example on the
stack, and the next step is STORE_FAST to bind the local name fee to whatever was on the stack.
In both cases, what happens next is to return (by reference) whatever fee is bound to.

So fee doesn't exist as such until the three bytecodes (LOAD_CONST, MAKE_FUNCTION, STORE_FAST)
in this example have been executed. To show that MAKE_FUNCTION is in general doing more
than moving a constant, give fee an argument with a default value expression. It could be
arbitrarily complicated, but we'll keep it simple:

 >>> def foo():
 ...     def fee(x, y=2*globalfun()):
 ...         return x, y
 ...     return fee
 ...
 >>> dis.dis(foo)
   2           0 LOAD_CONST               1 (2)
               3 LOAD_GLOBAL              0 (globalfun)
               6 CALL_FUNCTION            0
               9 BINARY_MULTIPLY
              10 LOAD_CONST               2 (<code object fee at 02EF21A0, file "<stdin>", line 2>)
              13 MAKE_FUNCTION            1
              16 STORE_FAST               0 (fee)

   4          19 LOAD_FAST                0 (fee)
              22 RETURN_VALUE

Compare to what came before MAKE_FUNCTION in the previous example. The def fee ... compiled into
code to compute the argument default value expression right there. That is not part of the fee
code, that is part of the fee-making code.

If the nested function makes use of its nested environment, there is extra work in setting up
the closure variables, so MAKE_FUNCTION is replaced my MAKE_CLOSURE, but either way the creation
of fee doesn't happen until the code compiled from the def source is executed, and if the def
code is nested, it doesn't get executed until its enclosing function is called.

Notice that def foo (compiled AND executed interactively above) didn't complain about globalfun,
which is just a name I picked. That's because foo hasn't been called yet, and the def-code to
generate fee has not been executed yet. But when we do:

 >>> foo()
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 2, in foo
 NameError: global name 'globalfun' is not defined

That's not from fee, that's from trying to create a fee default argument
as part of creating fee dynamically.

Now supplying globalfun, we can make it succeed:

 >>> import time
 >>> def globalfun(): return '[%s]'%time.ctime()
 ...
 >>> foo()
 <function fee at 0x02EF802C>
 >>> foo()(111, 222)
 (111, 222)
 >>> foo()(333)
 (333, '[Mon Apr 04 22:31:23 2005][Mon Apr 04 22:31:23 2005]')
 >>> foo()(333)
 (333, '[Mon Apr 04 22:31:37 2005][Mon Apr 04 22:31:37 2005]')

Note that the times changed, because we execute foo() and therefore def fee
multiple times but if we capture the fee output as f1 and f2, the times
are captured in fee's default arg according to when def fee was executed
and then that belongs to fee and won't change when fee is called.

 >>> foo()(111, 222)
 (111, 222)
That generated a new fee with a new default time, but didn't use the default

 >>> foo()(333)
 (333, '[Mon Apr 04 22:32:48 2005][Mon Apr 04 22:32:48 2005]')
That used the default. Now we will make instances of fee and
bind them to f1 and f2, pausing a little between so the times
should be different.

 >>> f1 = foo()
(paused 8 seconds apparently)
 >>> f2 = foo()

Now calling f1 or f2 is calling different fees with different,
(but constant because we are not calling foo again) defaults:

 >>> f1(1)
 (1, '[Mon Apr 04 22:32:55 2005][Mon Apr 04 22:32:55 2005]')
 >>> f1(1)
 (1, '[Mon Apr 04 22:32:55 2005][Mon Apr 04 22:32:55 2005]')

And different, but repeated:
 >>> f2(1)
 (1, '[Mon Apr 04 22:33:03 2005][Mon Apr 04 22:33:03 2005]')
 >>> f2(1)
 (1, '[Mon Apr 04 22:33:03 2005][Mon Apr 04 22:33:03 2005]')

Now get foo to make another fee and call it without even storing it:
 >>> foo()(1)
 (1, '[Mon Apr 04 22:33:40 2005][Mon Apr 04 22:33:40 2005]')


[...]
>Today I believe I have the correct view as I've said this morning. I
>could be wrong yet again. I hope not though I might have to give up
>programming. :/
Don't give up. It would be boring if it were all instantly clear.
The view is better after an enjoyable hike, and some of the flowers
along the way may turn out prettier than whatever the vista at the
top may be ;-)

For this part of the trail, just grok that def is executable,
not just the thing def's execution produces ;-)
>
>It's interesting that I have had several others tell me they had
>trouble with this too.
>
>So it is my opinion that decorators are a little too implicit.  I
>think there should be a way to make them easier to use while achieving
>the same objective and use. 
Maybe the above will help make functions and decorators a little easier
to understand.

HTH

Regards,
Bengt Richter


From Michael.Coll-Barth at VerizonWireless.com  Wed Apr 27 12:14:01 2005
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Wed, 27 Apr 2005 12:14:01 -0400
Subject: How do I parse this ? regexp ?
Message-ID: <20050427161406.16BCF1E4006@bag.python.org>



> From: serpent17 at gmail.com
> 
> I want to remove the commas, and square brackets [ and ] 
> characters and
> rewrite this whole line (and all the ones following in a text file
> where only space would be a delimiter. How do I do this ?
> 

If all you want to do to the data as you read in and write out a line, how
about string.replace('[',' ')?

x = 'as[df]as,df'
x = x.replace(']',' ')
x = x.replace('[',' ')
x = x.replace(',',' ')
___________________________________________________________________
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product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
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If you have received this communication in error, please notify me
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From radam2 at tampabay.rr.com  Tue Apr  5 22:31:05 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Wed, 06 Apr 2005 02:31:05 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<mailman.1412.1112744591.1799.python-list@python.org>
Message-ID: <ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>

On Tue, 05 Apr 2005 19:38:38 -0400, Steve Holden <steve at holdenweb.com>
wrote:


>> 
>So what you are saying is that you would like to be able to use 
>arbitrarily complex expressions after the :at" sign, as long as they 
>return a decorator? If so, you've been "pronounced" :-)
>
>regards
>  Steve

No not at all,  I never said that.  But.. ;-)


If we get into what I would like, as in my personal wish list, that's
a whole other topic. <g>


I would have preferred the @ symbol to be used as an inline assert
introducer.  Which would have allowed us to put debug code anywhere we
need.  Such as   @print total @.  Then I can switch on and off
debugging statements by setting __debug__ to True or False where ever
I need it.

And as far as decorators go.  I would of preferred a keyword, possibly
wrap, with a colon after it.  Something like this.

def function_name(x):
   return x 

wrap function_name:
   wrapper1()
   wrapper2()
   wrapper3()

A wrap command could more directly accomplish the wrapping, so that
def statements within def statements aren't needed. (Unless you
want'ed too for some reason.)

And as far as arbitrary complex expressions go.. Actually I think that
it's quite possible to do as it is. ;-)

But this is just a few of my current thoughts which may very well
change.  It's an ever changing list. <g>

Cheers,
Ron



From gandalf at geochemsource.com  Thu Apr  7 16:16:00 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 22:16:00 +0200
Subject: import statement - package visibility problem
In-Reply-To: <8cf2994e.0504071024.69de669f@posting.google.com>
References: <mailman.1478.1112870310.1799.python-list@python.org>
	<8cf2994e.0504071024.69de669f@posting.google.com>
Message-ID: <42559500.5000307@geochemsource.com>

Here is the example:

http://designasign.biz/Lib2.zip

Please extract the file and try to import Lib2

Although \Lib2\Client\Db\DatabaseConnection.py and 
\Lib2\Server\Db\DatabaseConnection.py  have the same class name but they 
are in a different sub-package. From a programmer's view, I hope this is 
okay.

 >>> import Lib2
 >>> Lib2.Server.Db.Adapters.OracleConnection
<module 'Lib2.Server.Db.Adapters.OracleConnection' from 
'Lib2\Server\Db\Adapters\OracleConnection.pyc'>

As an example of my problem, please look inside OracleConnection. You 
will see that it imports DatabaseConnection with an absolute package name:

from Lib2.Client.Db.DatabaseConnection import DatabaseConnection

so the OracleConnection.py file is dependent of its location in the 
package tree. I would like to make it independent of the full package 
tree since it only depends on 'the upper level'. I could have 10 
different types of adapters and 3 drivers for each. This is not a 
special exampe, I would like to do the same with many other classes:

- SQLProcessor (with implementations connected directly to databases, 
logging to files, printing to stdout etc)
- ReportExporter (with implementations exporting reports to excel files, 
text files, CSV files, XML files, PDF files etc.)

You can think about others but with the same structure:

- Create  the abstraction level as the upper level package and
- not just separate the implementation by a new directory but also with 
a new namespace (new sub-package).

The advantages are clear:

- Keep the implementation level and the abstraction level in well 
separated namespaces
- Do not have redundacy in the code - every module can contain 
dependencies but only to other modules/packages that are really needed 
(for example, OracleConnection should not rely on the fact that the 'Db' 
package is inside the 'Server' package. It should not even rely on that 
the name of the containing package is 'Db'. Also it should not rely on 
that the 'Lib2' package on sys.path  etc.)
- As a result, you can move a sub-package to another location without 
the need to modify possibly hundreds of files
- As a result you can move the whole package tree to anywhere and import 
it without changes in your enviroment - this can lead to interesting 
uses as well

Are these advantages good enough to start developing a magic 
'__upperpackage__' variable?

This is my dream: assuming that the containing package is already 
imported to Python, this statement:

from __upperpackage__.DatabaseConnection import DatabaseConnection

would bind '__upperpackage__' to the containing package. Of course, if 
the containing package has not been imported yet then it would raise an 
exception (ImportError: no module named __upperpackage__).

What do you think?

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From m at m.com  Wed Apr 27 12:10:00 2005
From: m at m.com (monkey)
Date: Thu, 28 Apr 2005 00:10:00 +0800
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
Message-ID: <426fb959_1@rain.i-cable.com>

> * Don't underestimate IDLE, it's surprisingly capable considering it's
> just a dinky little thing

Yes, I believe IDLE is the a unbeatible last resort for python (-:

> * SPE has great features, but the pure-Python-ness makes it slow!

Is it related to wxpython you mean? or program with GUI in tk (the default
installed with python) is faster? Would you mind to tell me more...




From whocaresrmb at yahoo.com  Fri Apr 29 23:24:50 2005
From: whocaresrmb at yahoo.com (Johnny Gentile)
Date: 29 Apr 2005 20:24:50 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
	<LXsce.2698$zu.1067@newssvr13.news.prodigy.com>
	<OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
Message-ID: <1114831490.664193.236140@l41g2000cwc.googlegroups.com>

Donald - go away. Far away. Now.
And, for the last time (hopefully), stop crossposting to
rec.music.beatles.
Go sell crazy somewhere else. We're all stocked up.

Donald L McDaniel wrote:
> AKA wrote:
> > "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
> > news:%23ATbpqMTFHA.3980 at TK2MSFTNGP12.phx.gbl...
> >> MC05 wrote:
> >>> "sheltech" <quasara at earthlink.net> wrote in message
> >>> news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
> >>>>
> >>>> "MC05" <smokerdude66 at myway.com> wrote in message
> >>>> news:3dc8hjF6s5i2uU1 at individual.net...
> >>>>>
> >>>>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in
message
> >>>>> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
> >>>>>>
> >>>>>> 4) I doubt seriously whether God plays a guitar, since guitars
> >>>>>> are made by men, for men.  His Son could theoretically play a
> >>>>>> guitar. Perhaps He does. Perhaps He doesn't.  Only the Father
> >>>>>> and His Holy Angels know.
> >>>>>
> >>>>> So then Lucifer was a wicked bass player whose sex and drugs
and
> >>>>> rock n roll alientated the rest of the band and was fired?
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> "Fired" ....  good one
> >>>
> >>> Heh.  Can't take credit for an accident.  Your eye is better than
> >>> mine. :)
> >>
> >> The Devil has been fired...by God Himself.  Read the Book of
> >> Revelation in the New Testament:  Satan's end is clearly outlined
by
> >> the Angel Jesus sent to St. John.  This end is very clear:  he
will
> >> be cast alive into the Lake which burns with fire and brimstone,
> >> where he will be tormented day and night forever.
> >>
> >> Not only Satan and his angels will be cast into the Lake, but all
> >> those who follow him and his servants.  I assure you, Satan won't
be
> >> ruling anyone in the Fire.  He will be in just as much torment as
> >> his followers. Neither will he have any sort of job.
> >>
> >> I strongly advise you to stop making fun of things you have no
> >> understanding of.  Your eternal destiny depends on the way you
treat
> >> others.
> >>
> >> --
> >> Donald L McDaniel
> >> Please reply to the original thread,
> >> so that the thread may be kept intact.
> >> ==============================
> >>
> > Just imagine if you actually had a coherent thought.
>
> My Bible tells me that the Truth sounds like foolishness to a
perishing man.
> Are you perishing?  God threw out a life-raft for you.  Jesus is more
than
> willing to rescue a drowning man.  Go to the nearest church(Roman
Catholic,
> Eastern Orthodox), and ask how you can be saved from your sin.
>
> --
> Donald L McDaniel
> Please reply to the original thread,
> so that the thread may be kept intact.
> ==============================



From behnel_ml at gkec.informatik.tu-darmstadt.de  Mon Apr 18 05:12:43 2005
From: behnel_ml at gkec.informatik.tu-darmstadt.de (Stefan Behnel)
Date: Mon, 18 Apr 2005 11:12:43 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <n9c1j2-198.ln1@home.rogerbinns.com>
References: <425a9869$0$38039$bed64819@news.gradwell.net><mailman.1769.1113320562.1799.python-list@python.org><1o31j2-7l6.ln1@home.rogerbinns.com>
	<mailman.1876.1113453407.1799.python-list@python.org>
	<n9c1j2-198.ln1@home.rogerbinns.com>
Message-ID: <d3vscb$i8r$1@lnx107.hrz.tu-darmstadt.de>


Roger Binns schrieb:
> As far as I can tell, they failed at two hurdles.  One is that there
> is a new BitPim release every two weeks and they can't really keep up
> with that.  (eg it takes around two weeks for packages with a lot of
> attention on Gentoo to become stable and often is a lot longer)

This is why many open source projects include (possibly outdated) .spec 
files directly in their tree. Makes it easy to just adapt them and run 
rpmbuild. Similar for Debian package specs.

With Python sources it is even easier (most of the time) since you can run
python setup.py bdist_rpm
which spits out a readily baken RPM, ready to be nailed into the system. 
Sadly, this doesn't exist for Debian and it doesn't work for all Python 
packages (Twisted, that is).

Stefan


From kent37 at tds.net  Fri Apr 22 15:10:59 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 15:10:59 -0400
Subject: Python licence again
In-Reply-To: <mailman.2299.1114196095.1799.python-list@python.org>
References: <mailman.2299.1114196095.1799.python-list@python.org>
Message-ID: <426947f6$1_2@newspeer2.tds.net>

Laszlo Zsolt Nagy wrote:
> 
>  Hi All!
> 
> I know there has been a post about Python licencing but I have different 
> questions. I tried to Google for "Python Licence" and "Python Licencing" 
> but I could not find the answer.
> Is there a place where I can ready about Python licencing? (A FAQ 
> maybe?) I really need to know the details of the licence, but not in the 
> lawyer's language. Just simple questions:
> 
> - How put a software under the Python licence?
> - What can I do with the software?
> - What can't I do?

This might help:
http://www.python.org/moin/PythonSoftwareFoundationLicenseFaq

Kent


From rkern at ucsd.edu  Sun Apr 24 01:14:46 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 23 Apr 2005 22:14:46 -0700
Subject: Variables
In-Reply-To: <426B1A6F.2060401@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b0d03_3@newspeer2.tds.net>	<426B1300.6090802@cloudthunder.com>	<d4f4ps$7cu$1@sea.gmane.org>
	<426B1A6F.2060401@cloudthunder.com>
Message-ID: <d4f9n1$fah$1@sea.gmane.org>

Richard Blackwood wrote:
> Robert Kern wrote:

>> If you must, http://en.wikipedia.org/wiki/Variable
>>
> Fantastic, wikipedia deals precisely with the difference between 
> variables in mathematics versus programming. However, he would never 
> trust a definition from such an "unreputable" source. If you have any 
> other sources I might direct him to...he maintains that the notion of 
> foo being a variable where it's value is known (versus unknown) is 
> illogical.

His problem is that he doesn't respect that technical terms can have 
different meanings in different fields and contexts. No authoritative 
reference can solve his problem for him. He's being overly pedantic 
about a field in which *he* is clearly not an authority. You can't 
convince such people, only ignore them.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From sabbey at u.washington.edu  Sun Apr 17 17:15:57 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sun, 17 Apr 2005 14:15:57 -0700
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <cf052f0d.0504162206.129ccdbd@posting.google.com>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<cf052f0d.0504162206.129ccdbd@posting.google.com>
Message-ID: <Pine.A41.4.61b.0504171403540.232474@dante76.u.washington.edu>

Oren Tirosh wrote:
> Take a look at Nick Coglan's "with" proposal:
>
> http://groups.google.co.uk/groups?selm=mailman.403.1105274631.22381.python-list%40python.org
>
> It addresses many of the same issues (e.g. easy definition of
> properties). It is more general, though: while your proposal only
> applies to keyword arguments in a function call this one can be used
> to name any part of a complex expression and define it in a suite.
>
> I think that a good hybrid solution would be to combine the "with"
> block with optional use of the ellipsis to mean "all names defined in
> the with block".
>
> See also the thread resulting from Andrey Tatarinov's original
> proposal (using the keyword "where"):
>
> http://groups.google.co.uk/groups?selm=3480qqF46jprlU1%40individual.net

Thanks for the links.  I wasn't aware of that proposal.

I agree that a hybrid solution is probably the way to go.

Does anyone know if the 'where' keyword is only for readability (or does 
it disambiguate the syntax in some situations)?  I think I prefer leaving 
it off.

Maybe using '**' would be better than '...' since it already is used to 
indicate keyword arguments.  Example:

class C(object):
     x = property(**):
        doc = "I'm the 'x' property."
        def fget(self):
           return self.__x
        def fset(self, value):
           self.__x = value
        def fdel(self):
           del self.__x


-Brian


From gerrit at nl.linux.org  Tue Apr 12 15:01:22 2005
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 12 Apr 2005 21:01:22 +0200
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <425BDA9E.3085184C@pauahtun.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<8qan515t9sedgbp954fj85jvu0tc2171ec@4ax.com>
	<425BDA9E.3085184C@pauahtun.org>
Message-ID: <20050412190122.GA13205@topjaklont.student.utwente.nl>

Ivan Van Laningham wrote:
> Richie Hindle wrote:
> > 
> > [Xah]
> > > motherfucking ... fucking ... fucking ... fucking ... fuck ... fucking
> > > fucking ... fucking ... mother fucking ... fucking ... piece of shit ...
> > > motherfucking ... fucking ... fucking ... big asshole ... masturbation ...
> > > Fucking morons ... fucking stupid ... fuckhead coders ... fuckheads ...
> > > you fucking asses.
> > 
> > > paypal me a hundred dollars and i'll rewrite the whole re doc in a few
> > > hours.
> > 
> > Can we paypal you a hundred dollars to leave us alone?  I'll pledge $10.
> > Are there another nine people here who'll do the same?
> 
> Why don't we pay him $100 to re-write the PERL docs?

Interestingly, Richard Hindle's message was classified as ham by my
spambayes, whereas your message was unsure. Could it be the
second-to-last word doing it? (-;

Gerrit.

-- 
Weather in Twenthe, Netherlands 12/04 19:55:
	13.0?C   wind 2.2 m/s NNW (57 m above NAP)
-- 
In the councils of government, we must guard against the acquisition of
unwarranted influence, whether sought or unsought, by the
military-industrial complex. The potential for the disastrous rise of
misplaced power exists and will persist.
    -Dwight David Eisenhower, January 17, 1961


From mwm at mired.org  Sat Apr  9 16:07:32 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 09 Apr 2005 15:07:32 -0500
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
Message-ID: <86k6nbww6z.fsf@guru.mired.org>

aahz at pythoncraft.com (Aahz) writes:

> Use vim.  80% of the power of emacs at 20% of the learning curve.

Hmm. Can I read mail/news/web pages in vim? I can in emacs.

Emacs is a computing environment. I read mail and news in it, so I
don't have to worry about learning some applications custom editor
(ok, a good MUA/newsreader will invoke my favorite editor - but that's
Emacs, so why bother). I use emacs for the heavy lifting.

vi is adequate, and I use it for editing things as root. Every once
and a while I'll start an emacs as root, but I do try to avoid that.

For quick edits (as either root or me) I use ex. I can't get past ed
not having a prompt.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tpherndon at gmail.com  Fri Apr 15 11:42:54 2005
From: tpherndon at gmail.com (Peter Herndon)
Date: 15 Apr 2005 08:42:54 -0700
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <mailman.1957.1113568143.1799.python-list@python.org>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
Message-ID: <1113579774.353462.30960@l41g2000cwc.googlegroups.com>

Another option is adodbapi, which in my experience is much faster than
mx.ODBC.  You can find it at http://adodbapi.sourceforge.net , and it
is Windows-only.  There's also http://pymssql.sourceforge.net, which is
cross-platform using FreeTDS and unixodbc on *nix.  I haven't any
experience with it, though.



From roy at panix.com  Tue Apr  5 19:48:29 2005
From: roy at panix.com (Roy Smith)
Date: Tue, 05 Apr 2005 19:48:29 -0400
Subject: Propagating poorly chosen idioms
References: <mailman.1398.1112721652.1799.python-list@python.org>
	<rgF4e.6094$7b.3817@trndny01>
Message-ID: <roy-6223E6.19482905042005@reader1.panix.com>

"Raymond Hettinger" <vze4rx4y at verizon.net> wrote:
> The remainder of the unittest docs are somewhat obtuse and uninspiring.

QOTW, perhaps?


From jtr at ofb.net  Sat Apr 23 17:07:46 2005
From: jtr at ofb.net (John Reese)
Date: Sat, 23 Apr 2005 21:07:46 +0000 (UTC)
Subject: memory profiler?
References: <slrnd6dv59.j93.jtr@ofb.net> <-ISdnfAtjJdEhfrfRVn-uQ@powergate.ca>
Message-ID: <slrnd6le92.rpe.jtr@ofb.net>

On Wed, 20 Apr 2005 23:06:51 -0400, Peter Hansen <peter at engcorp.com> wrote:
> John Reese wrote:
>> Is there a memory or heap profiler for python programs?  So that, for
>> example, if a program was bloating over time I could see how many of
>> each object there were and maybe even where the references were?
>
> The "gc" module has a variety of helpful features
> like that.
>
> -Peter

In particular, get_objects() and get_referrers().  Good point.


From martin at v.loewis.de  Tue Apr  5 16:19:25 2005
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 05 Apr 2005 22:19:25 +0200
Subject: Add System Path?!?
In-Reply-To: <mailman.1403.1112730254.1799.python-list@python.org>
References: <mailman.1403.1112730254.1799.python-list@python.org>
Message-ID: <4252f2cd$0$21546$9b622d9e@news.freenet.de>

andrea_gavana at tin.it wrote:
> These exe files do not work if I don't set the PATH variable also to that
> adress. I know I can do it by hand (and also my users can), but I wonder
> if there is a way to do it in Python...

You didn't mention what operating system you are using. On Unix, PATH
is an environment variable, and environment variables can be set in
a process and all child processes, but not in a parent process. So if
you can somehow arrange that the processes that need the PATH setting
are child processes of a Python interpreter, this could be possible.

If you were hoping that you invoke a Python script, and that modifies
the environments of already-running shells - that is not possible.

Regards,
Martin


From J.Ferguson at 127.0.0.1  Tue Apr 26 17:47:02 2005
From: J.Ferguson at 127.0.0.1 (John A Ferguson)
Date: Wed, 27 Apr 2005 09:47:02 +1200
Subject: Progress Bar with urllib2
References: <%vxbe.156302$Nr5.39335@fe2.news.blueyonder.co.uk>
Message-ID: <xk3ingdqfe2h$.u7phq6ynrrn4.dlg@40tude.net>

On Tue, 26 Apr 2005 20:28:43 GMT, Andrew Godwin wrote:

> I'm trying to write a python script to download data (well, files) from a HTTP server (well, a PHP script spitting them out, at least).
> The file data is just the returned data from the request (the server script echoes the file and then dies).
> 
> I call the page using urllib2, like so:
> 
> satelliteRequest = urllib2.Request(satelliteServer + "?command=download&filepath="+filepath)
> satelliteRequestData = {"username":satelliteUsername, "password":satellitePassword}
> satelliteRequest.add_data(urllib.urlencode(satelliteRequestData))
> satelliteOpener = urllib2.build_opener()
> satelliteOpener.addheaders = [('User-agent', userAgent)]
> 
> Now, if I want to download the file all at once, I just do
> 
> satelliteData = satelliteOpener.open(satelliteRequest).read()
> 
> But some of these files are going to be really, really big, and I want to get a progress bar going. 
> I've tried doing a while loop like this:
> 
> chunkSize = 10240
> while 1:
>  dataBuffer = satelliteOpener.open(satelliteRequest).read(chunkSize)
>  data += dataBuffer
>  if not dataBuffer:
>   break
> 
> But that just gives me the first 10240 bytes again and again. Is there something I'm missing here?
> It might even be I'm calling urllib2 the wrong way (does it download when you read() or when you create the Request?)
> 
> All help is appreciated, I'm sort of stuck here.
> 
> Andrew Godwin

Each time through the loop you re-open the url and thus start from the
beginning. You need to separate the opening from the reading.

HTH,
 John


From peter at engcorp.com  Tue Apr  5 10:34:54 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 10:34:54 -0400
Subject: change extensions
In-Reply-To: <4251cef9@dnews.tpgi.com.au>
References: <4251cef9@dnews.tpgi.com.au>
Message-ID: <ouWdnSxD5IGTP8_fRVn-3A@powergate.ca>

Bob Then wrote:
> how can i change all files from one extension to another within a direcory?

Using Jason Orendorff's path.py module:

# change all .py files in '.' to extension .new
from path import path

for f in path('.').files():
     if f.endswith('.py'):
         f.rename(f.splitext()[0] + '.new')



Don't try the above in a folder containing useful
Python files! ;-)

-Peter


From andreis at stud.cs.uit.no  Tue Apr  5 04:34:14 2005
From: andreis at stud.cs.uit.no (=?ISO-8859-1?Q?Andr=E9_S=F8reng?=)
Date: Tue, 05 Apr 2005 10:34:14 +0200
Subject: monitoring folder in python
In-Reply-To: <1112680205.659755.211400@z14g2000cwz.googlegroups.com>
References: <1112680205.659755.211400@z14g2000cwz.googlegroups.com>
Message-ID: <d2tie7$1hge$1@news.uit.no>

Raghul wrote:
> Is it possible to monitor a folder in the python?My question is if I
> put any file in it that particular folder my script should monitor the
> folder and read the file name.If so what function can I use?
> 
> Thanx in advance
> 

If you do not want to poll (check for changes yourself regularly),
here are some pointers:

In Windows:

With the win32 extensions, it's quite simple:

http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html

In Linux:

http://www.edoceo.com/creo/inotify/

http://www.student.lu.se/~nbi98oli/dnotify.html

http://www.lambda-computing.com/projects/dnotify/

Don't know of any Python extensions for the above, so you might
have to write your own if you want to use them from Python. Also,
you probably need to reconfigure and compile a new kernel. Have
tested inotify myself and it seems to work, you also get the filename
with the event. Only problem is it don't support monitoring a directory
recursive (subdirectories) like in Windows with ReadDirectoryChangesW.



From simon.brunning at gmail.com  Thu Apr 21 05:11:10 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 21 Apr 2005 10:11:10 +0100
Subject: Using Jython in Ant Build Process
In-Reply-To: <d46p19$pmc$1@domitilla.aioe.org>
References: <d46p19$pmc$1@domitilla.aioe.org>
Message-ID: <8c7f10c605042102111e64cf17@mail.gmail.com>

On 4/21/05, Maurice LING <mauriceling at acm.org> wrote:
> I am looking for a way to use Jython in Ant build process. I have some
> pure Python scripts (not using any C extensions) that I'll like to
> incorporate into Java using Jython. I heard that this can be done but
> you can I set up Ant to do this? Sorry, I'm no expert with Ant.

http://www.pycs.net/users/0000177/stories/11.html

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From jstroud at mbi.ucla.edu  Sun Apr  3 00:59:16 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 2 Apr 2005 21:59:16 -0800
Subject: Finding attributes in a list
In-Reply-To: <200504022151.09978.jstroud@mbi.ucla.edu>
References: <1112101524.879186.260630@o13g2000cwo.googlegroups.com>
	<5e183f3d050402204426e9099f@mail.gmail.com>
	<200504022151.09978.jstroud@mbi.ucla.edu>
Message-ID: <200504022159.16598.jstroud@mbi.ucla.edu>

On Saturday 02 April 2005 09:51 pm, James Stroud wrote:
> where team could be initialized by a tuple:
>
> ? class Team(list):
> ? ? def __init__(self, azip):
> ? ? ? for azip in alist:
> ? ? ? ? self.data.append(Player(atup))

Sorry, this should read:

where team could be initialized by a list of tuples:

  class Team(list):
    def __init__(self, azip):
      for atup in azip:
        self.data.append(Player(atup))

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

http://www.jamesstroud.com/


From ville at spammers.com  Tue Apr 12 08:53:46 2005
From: ville at spammers.com (Ville Vainio)
Date: 12 Apr 2005 15:53:46 +0300
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net> <du71x9ho29x.fsf@mozart.cc.tut.fi>
	<3c1qrjF6k3k4fU1@individual.net>
Message-ID: <du7oeck2m1x.fsf@lehtori.cc.tut.fi>

>>>>> "Claudio" == Claudio Grondi <claudio.grondi at freenet.de> writes:

    Claudio> Considering what I found in the ipython mailing archives
    Claudio> and the fact, that after the fix with displaying colors
    Claudio> on bright backgrounds Gary had no time yet to get in
    Claudio> touch with me about the code I have sent him, I suppose,
    Claudio> that there will be no new releases addressing this
    Claudio> problem soon, right?

No idea. There have been multiple complaints about the issue (and
functional patches to fix the problem), so I wouldn't be surprised if
this issue was solved quickly enough.

    Claudio> lazy at the moment, because instead of trying to fix it
    Claudio> just switched back to Idle ...

Don't get too lazy, you're not alone with this problem. I get a beep
every time I try to type a scandinavian character (??) on ipython
console, luckily I never have to do that :-).

-- 
Ville Vainio   http://tinyurl.com/2prnb


From Pokerface.1ndl7k at no-mx.tacticalgamer.com  Tue Apr 12 08:32:09 2005
From: Pokerface.1ndl7k at no-mx.tacticalgamer.com (Pokerface)
Date: Tue, 12 Apr 2005 08:32:09 -0400
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <Pokerface.1ndl7k@no-mx.tacticalgamer.com>


Gotta say, is we let this man write the docs for us, they'll sure as
sugar be more colorful than the ones we presently have, even if he
doesn't manage to make them better.

"The [insert relation]****ing Python interpreter is usually installed
as /usr/local/bin/python on those g*dd*mn machines where it is
available; putting /usr/local/bin in your ****ing Unix shell's search
path makes it possible to start it by typing the command python to the
shell.  F***er."


-- 
Pokerface:: Posted from Tactical Gamer - http://www.TacticalGamer.com ::



From joeldg at gmail.com  Thu Apr  7 12:39:34 2005
From: joeldg at gmail.com (joeldg at gmail.com)
Date: 7 Apr 2005 09:39:34 -0700
Subject: logging as root using python script
In-Reply-To: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
Message-ID: <1112891974.637958.159720@o13g2000cwo.googlegroups.com>

use the program called 'expect'
it can be called via python.
you can build a script using the 'autoexpect' tool.
http://www.linuxjournal.com/article/3065

cheers

Raghul wrote:
> Hi
>    Is it possible to login as a root in linux using python script?
> What I need is when I execute a script it should login as root and
> execute my command and logout from root to my existing account. IS is
> possible?
> 
> Thanx in advance.



From tim at tt1lock.org  Fri Apr  8 03:57:23 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Fri, 8 Apr 2005 07:57:23 GMT
Subject: Grouping code by indentation - feature or ******?
References: <IDwEr6.K2u@bath.ac.uk>
Message-ID: <IEMBFn.L6n@bath.ac.uk>

I, Tim Tyler <tim at tt1lock.org> wrote or quoted:

> What do you guys think about Python's grouping of code via 
> indentation?

Some relevant resources:

http://c2.com/cgi/wiki?PythonWhiteSpaceDiscussion
http://c2.com/cgi/wiki?IndentationEqualsGrouping
http://c2.com/cgi/wiki?SyntacticallySignificantWhitespaceConsideredHarmful

The first page talks quite a bit about distinguishing between
tabs and spaces.
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From fredrik at pythonware.com  Sat Apr 23 04:20:29 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 23 Apr 2005 10:20:29 +0200
Subject: Python Imaging Library and PyGTK - color image path?
References: <pan.2005.04.23.02.43.12.576815@jerf.org>
Message-ID: <d4d07f$d7f$1@sea.gmane.org>

Jeremy Bowers wrote:

>I have an image in the Python Image Library. I'm trying to get it into
> PyGTK in color. Is there any way to do this cross-platform, preferably
> without writing to anything to the disk?
> 
> PIL apparently can't write XPMs. GTK will only take XPMs, that I can see.
> Therein lies the rub. I can ship over monochrome bitmaps via XBM, but I'd
> rather be able to ship over full color.

the first two google hits for "PyGTK PIL" are

    http://www.daa.com.au/pipermail/pygtk/2005-April/009988.html

which provides a StringIO-based solution, and

    http://www.daa.com.au/pipermail/pygtk/2003-February/004393.html

which discusses draw_rgb_image and friends, and says that "if you can convert
your PIL image to a  pixel data string or buffer object, you could use them to
display the image".  here's some code that seems to do exactly that:

    http://www.mail-archive.com/pygtk at daa.com.au/msg07167.html

(but maybe this is some kind of stupid "a bitmap isn't a pixmap isn't an image"
thing?  if so, I suggest getting a modern windowing system ;-)

</F>



From bill.mill at gmail.com  Wed Apr 13 11:30:41 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 13 Apr 2005 11:30:41 -0400
Subject: Codig style: " or """
In-Reply-To: <20050413151321.791.qmail@web61109.mail.yahoo.com>
References: <20050413151321.791.qmail@web61109.mail.yahoo.com>
Message-ID: <797fe3d4050413083043a4f587@mail.gmail.com>

On 4/13/05, Sara Khalatbari <sarapythonlist at yahoo.com> wrote:
> Hi!
> 
> Suppose you're writing a module & writing the
> definition of each function in that module in " or
> """.
> for example:
> a) "This function does this & that"
> or:
> b)  """This function does blah blah blah"""
> 
> What are the differences between " and """ ?
> I'm using gedit & I wanna know a bit about coding
> style.
> 
> To be very honest: I have a very strict boss who looks
> for bugs in my codes & he insists to know exactly
> which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
> my coding style on when using " or """.
> 
> Can anybody out there give me some hint?
> Can anybody tell me where to find a document on python
> coding style.
> 

the authoritative coding style guide is pep 8:

http://www.python.org/peps/pep-0008.html

Of course, there are style points that are debatable, but for
comments, you should definitely be using triple-quotes. Pep 8 points
you to pep 257, which is all about docstrings:

http://www.python.org/peps/pep-0257.html

Peace
Bill Mill
bill.mill at gmail.com


From mahs at telcopartners.com  Thu Apr 28 01:47:59 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 27 Apr 2005 22:47:59 -0700
Subject: creating very small types
In-Reply-To: <427012B4.7090604@gmail.com>
References: <mailman.2599.1114633031.1799.python-list@python.org>	<pan.2005.04.27.21.46.20.199466@jerf.org>
	<427012B4.7090604@gmail.com>
Message-ID: <d4pt32$o8q$1@sea.gmane.org>

andrea wrote:
> No it's not for homework but for learning purposes...

Bengt wrote:
> I think I prefer little-endian bit streams though, 

good point: should lead to easier decoding via right-shifts

e.g. (just hacked, not tested beyond
> what you see 

Yep, yours looks better.  Pretty soon there isn't going to be much learning left 
in this for Andrea ;-)

and not recommended as efficient either way, esp the decode,

I expect that decoding by walking the coding tree is cleaner (not sure about 
faster).


but it might
> be illustrative of something for Andrea  ;-) 

Michael





From dan at dontspammecauseidontlikit.com  Thu Apr 21 09:16:43 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Thu, 21 Apr 2005 21:16:43 +0800
Subject: Strings
Message-ID: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>

I've having trouble coming to grip with Python strings.

I need to send binary data over a socket.  I'm taking the data from a
database.  When I extract it, non-printable characters come out as a
backslash followed by a three numeric characters representing the
numeric value of the data.  I guess this is what you would call a raw
Python string.  I want to convert those four characters ( in C-think,
say "\\012" ) into a single character and put it in a new string.

There's probably a simple way to do it, but I haven't figured it out.
What I've done so far is to step through the string, character by
character.  Normal characters are appended onto a new string.  If I
come across a '\' character, I look for the next three numeric
characters.  But I don't know how to convert this code into a single
character and append it onto the new string.

I'm sure what I'm doing is long and convoluted.  Any suggestions would
be appreciated.

Dan



From eldiener_no_spam_here at earthlink.net  Fri Apr  8 13:30:33 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Fri, 08 Apr 2005 17:30:33 GMT
Subject: Installing Python 2.4 on Linux
In-Reply-To: <mailman.1545.1112979152.1799.python-list@python.org>
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
	<mailman.1545.1112979152.1799.python-list@python.org>
Message-ID: <Zcz5e.2604$sp3.2373@newsread3.news.atl.earthlink.net>

Joseph Garvin wrote:
> Another solution is to just install 2.4 and then make an alias for
> yum='/usr/bin/python2.3 yum' or whatever the path is :)

If it were just 'yum' under Fedora 3, I could probably do that but 
looking at the dependencies on the python2.3 package in Synaptic there 
must be about 50 other packages mentioned. Which one of these 
specifically use python2.3 to execute their .py scripts and which ones 
just use python2.3 shared libraries is another matter which will take 
much work to discover. But thanks for your suggestion nonetheless.

> 
> Edward Diener wrote:
> 
> 
>>I can install Python 2.4 on the Fedora 3 Linux system, but after I do
>>a number of Linux utilities and commands, like yum, stop working
>>because they were dependent on the Python 2.3 installation. What
>>happens is that Python 2.4 replaces the /usr/bin/python module with
>>the Python 2.4 version. If I replace /usr/bin/python with the Python
>>2.3 version executable, which is still on my system, that all the
>>aforesaid modules depend on, they start working again, but I can no
>>longer execute modules, like IDLE, which was part of my Python 2.4
>>distribution.
>>
>>What is the solution to this ? The operating system was installed with
>>Python 2.3 and the development libraries but no tools, doc, or
>>otherwise. I have installed Python 2.4 with all the RPMs and copied
>>down the Python 2.4 documentation to my machine ( since
>>python24-docs.rpm gives one very little ). I would naturally like to
>>use Python 2.4 without killing all the commands that depend on Python
>>2.3. No doubt these commands have their modules in the site libraries
>>for Python 2.3. Of course I would love to update these dependencies to
>>use Python 2.4 but newer RPMs for these commands do not exist.
>>
>>I do not know whether this is a Python problem or a Fedora 3 problem
>>but I thought I would ask here first and see if anybody else had the
>>same problem. I imagine the problem might exist on other Linux systems.
> 
> 
> 


From matthew_shomphe at countrywide.com  Thu Apr  7 19:14:01 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 7 Apr 2005 16:14:01 -0700
Subject: text processing problem
In-Reply-To: <d34a7f$gnd$1@domitilla.aioe.org>
References: <d34a7f$gnd$1@domitilla.aioe.org>
Message-ID: <1112915641.663333.175260@f14g2000cwb.googlegroups.com>


Maurice LING wrote:
> Hi,
>
> I'm looking for a way to do this: I need to scan a text (paragraph or

> so) and look for occurrences of "<text-x> (<text-x>)". That is, if
the
> text just before the open bracket is the same as the text in the
> brackets, then I have to delete the brackets, with the text in it.
>
> Does anyone knows any way to achieve this?
>
> The closest I've seen is
> (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305306) by
> Raymond Hettinger
>
>  >>> s = 'People of [planet], take us to your leader.'
>  >>> d = dict(planet='Earth')
>  >>> print convert_template(s) % d
> People of Earth, take us to your leader.
>
>  >>> s = 'People of <planet>, take us to your leader.'
>  >>> print convert_template(s, '<', '>') % d
> People of Earth, take us to your leader.
>
> """
>
> import re
>
> def convert_template(template, opener='[', closer=']'):
>      opener = re.escape(opener)
>      closer = re.escape(closer)
>      pattern = re.compile(opener + '([_A-Za-z][_A-Za-z0-9]*)' +
closer)
>      return re.sub(pattern, r'%(\1)s', template.replace('%','%%'))
>
> Cheers
> Maurice


Try this:
import re
my_expr = re.compile(r'(\w+) (\(\1\))')
s = "this is (is) a test"
print my_expr.sub(r'\1', s)
#prints 'this is a test'

M@



From steven.bethard at gmail.com  Wed Apr 20 01:55:05 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 19 Apr 2005 23:55:05 -0600
Subject: pre-PEP: Simple Thunks
In-Reply-To: <3cm15nF6m5qgiU1@individual.net>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<3cm15nF6m5qgiU1@individual.net>
Message-ID: <tbGdnWVMjZklc_jfRVn-tQ@comcast.com>

Greg Ewing wrote:
> Brian Sabbey wrote:
> 
>> do f in with_file('file.txt'):
>>     print f.read()
> 
> 
> I don't like this syntax. Try to read it as an English sentence:
> "Do f in with file 'file.txt'". Say what???
> 
> To sound right it would have to be something like
> 
>   with_file('file.txt') as f do:
>     print f.read()
> 

This is still strange since f is the arguments the thunk was called 
with, e.g. the current syntax is basically:

     do <unpack_list> in <returnval> = <callable>(<params>):
         <code>

I don't really know a more readable sequence of keywords, though someone 
suggested 'with' and 'from', which might read something like:

     with <unpack_list> from <callable>(<params>):
         <code>

which looks okay to me, though I'm not sure that 'with' makes it clear 
that this is not a normal block...  I also find readability problems 
when I try to stick <returnval> back in.

One of the other issues is that, with the current proposal, the thunk 
can be called multiple times within a function, so the keywords have to 
make sense both with a single iteration interpretation and a multiple 
iteration interpretation...  Makes it even harder...

STeVe


From ckwiguno at gmail.com  Sat Apr 30 13:30:48 2005
From: ckwiguno at gmail.com (custard_pie)
Date: 30 Apr 2005 10:30:48 -0700
Subject: Directory in Windows
Message-ID: <1114882248.306624.199600@o13g2000cwo.googlegroups.com>

Hi,..I tried to list files in a tree directory using os.path.walk. To
avoid dirnames fromm being listed i use the os.path.isdir method.
However, when isdir encounters directories that use spaces in their
name e.q My Documents it doesn;t recognize them as directories.. Is
there any solution to this,..pertaining that I want to keep the naming
of my directories?



From bokr at oz.net  Tue Apr 12 06:19:07 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 12 Apr 2005 10:19:07 GMT
Subject: args attribute of Exception objects
References: <mailman.1526.1112952761.1799.python-list@python.org>
	<pan.2005.04.08.16.07.30.85408@jerf.org>
	<8dad5312.0504110231.68f6a21b@posting.google.com>
	<425ae097.133343848@news.oz.net>
	<8dad5312.0504120057.19c60370@posting.google.com>
Message-ID: <425b979f.180199683@news.oz.net>

On 12 Apr 2005 01:57:31 -0700, sdementen at hotmail.com (Sebastien de Menten) wrote:

>Thank you guys for those good advices (and the very interesting
>example of AST hacking).
>
>However, this was an example of use for Exception.args. It does not
>alleviate my concerns about the fact that the args attribute is poorly
>designed for standard Exceptions.
>It is as if the Exception design was only made for end users (display
>of a string in an interpreter) without thinking about original ways to
>use them :-)
>
Look into it some more ;-)

Have you thought of subclassing Exception for your own purpose?
You can override the base exception class's Exception.__init__
which UIAM effectively does

    def __init__(self, *args):
        self.args = args

and no more. Using an existing special purpose exception like NameError
(IIRC seeing that correctly) to carry info for you is pretty weird ;-)

Here is a subclass that takes what would be e.args[0] and delivers it
instead as e.answer (well, "e" is "retans" below ;-)

 >>> class BailingOutWithAnswer(Exception):
 ...     def __init__(self, answer):
 ...         self.answer = answer
 ...
 >>> for ans in ['string', 123, 4.5, 67L, 8+9j,
 ...         type('MyClass',(),{}), type('MyInst',(),{})()]:
 ...     try: raise BailingOutWithAnswer(ans)
 ...     except BailingOutWithAnswer, retans:
 ...         print '%r -> retans.answer: %r' %(ans, retans.answer)
 ...
 'string' -> retans.answer: 'string'
 123 -> retans.answer: 123
 4.5 -> retans.answer: 4.5
 67L -> retans.answer: 67L
 (8+9j) -> retans.answer: (8+9j)
 <class '__main__.MyClass'> -> retans.answer: <class '__main__.MyClass'>
 <__main__.MyInst object at 0x02EF14EC> -> retans.answer: <__main__.MyInst object at 0x02EF14EC>

It's the easiest thing in the world to define a minimal Exception subclass to give you
back in e.args whatever you pass it as args when you raise it. Obviously I could have used
a table of arg tuples and just raise XEasy(*argtuples[i]) instead of separating them out,
but I wanted to show how plain raise expression syntax with
different numbers of arguments map to e.args.

 >>> class XEasy(Exception): pass
 ...
 >>> for i in xrange(7):
 ...     try:
 ...         if i==0: raise XEasy(123)
 ...         elif i==1: raise XEasy(4.5, 67L)
 ...         elif i==2: raise XEasy(*'this may seem tricky ;-)'.split())
 ...         elif i==3: raise XEasy, 'usual ordinary message form'
 ...         elif i==4: raise XEasy(8+9j, type('AClass',(),{}))
 ...         elif i==5: raise XEasy(type('AClass',(),{})(),'<=[class instance]')
 ...         elif i==6: raise XEasy('--------------------------------------------')
 ...     except XEasy, e:
 ...         print e.args
 ...
 (123,)
 (4.5, 67L)
 ('this', 'may', 'seem', 'tricky', ';-)')
 ('usual ordinary message form',)
 ((8+9j), <class '__main__.AClass'>)
 (<__main__.AClass object at 0x02EF166C>, '<=[class instance]')
 ('--------------------------------------------',)

Oops, left out the no-arg raises

 >>> try: raise XEasy
 ... except XEasy, e: print e.args
 ...
 ()
 >>> try: raise XEasy()
 ... except XEasy, e: print e.args
 ...
 ()

Did I misunderstand the problem again?

Regards,
Bengt Richter


From mal at egenix.com  Fri Apr 15 17:30:03 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 15 Apr 2005 23:30:03 +0200
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <OF2DB2D57C.B65B8A59-ON80256FE4.004C9A9A-80256FE4.004C305B@oxfam.org.uk>
References: <OF2DB2D57C.B65B8A59-ON80256FE4.004C9A9A-80256FE4.004C305B@oxfam.org.uk>
Message-ID: <4260325B.2030608@egenix.com>

gsmith at Oxfam.org.uk wrote:
> I do have a standard install of Python as well as Plone.  Can you have two?
> I have run the mxInstaller for both instances .... however, whether I run
> the ide from my standard install or my plone install the pythonpath is the
> same (ie c:\...\plone 2\python).  My machine registry now has the python
> entries all pointing at plone.
> 
> Sorry to trouble you like this but do you know how I can get myself out of
> this mess?

For Plone, you need to install the "mxODBC Zope DA", not
stand-alone mxODBC Python extension:

    http://www.egenix.com/files/python/mxODBC-Zope-DA.html

Installation docs are here:

    http://www.egenix.com/files/python/mxODBC-Zope-DA.html#Documentation

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 15 2005)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From gsakkis at rutgers.edu  Tue Apr 26 02:03:57 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 23:03:57 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
	<1114457804.600476.324860@o13g2000cwo.googlegroups.com>
	<1114470993.307543.133770@z14g2000cwz.googlegroups.com>
	<1114493251.818250.6580@g14g2000cwa.googlegroups.com>
Message-ID: <1114495437.518381.140890@g14g2000cwa.googlegroups.com>

> Oh, I overlooked this. Then the solution becomes simple:
>
>    sys._getframe().f_trace
>
> Test:
>
> >>> an = Analyzer()
> >>> sys.settrace(an.trace_returns)
> >>> sys._getframe().f_trace
> <bound method Analyzer.trace_returns of <__main__.Analyzer instance
at
> 0x010015D0>>

Does this work for you non-interactively ? I tried running it from a
script or importing it from a module but it returns None. Very
strange...

George



From apardon at forel.vub.ac.be  Thu Apr 21 05:57:30 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 09:57:30 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
	<slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2178.1114006723.1799.python-list@python.org>
	<slrnd6ei0q.ge8.apardon@rcpc42.vub.ac.be>
	<9LI9e.28173$1p4.20603@trndny06>
	<slrnd6eof7.ge8.apardon@rcpc42.vub.ac.be>
	<SDK9e.22142$nt3.10484@trndny04>
Message-ID: <slrnd6eu89.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-21, Raymond Hettinger schreef <vze4rx4y at verizon.net>:
>> > [Antoon Pardon]
>> >> I don't see why the start index can't be accessible through
>> >> a method or function just like the length of a list is now.
>> >>
>> >> My favourite would be a range method so we would have
>> >> the following idiom:
>> >>
>> >>   for i in lst.range():
>> >>     do something with lst[i]
>> >
>> > After going to all that trouble, you might as well also get the value at
> that
>> > position:
>> >
>> > for i, x in enumerate(lst):
>> >     do something with lst[i] also known as x
>>
>> No you wouldn't, enumerate always starts with 0.
>
> You don't get it.  Your proposed list-like class indicates its start index.
> enumerate() can be made to detect that start value so that the above code always
> works for both 0-based and 1-based arrays.

Oh you mean if it would be made a buildin class.

Personnally I would still prefer my range solution. I often find
enumerate gives me too much. Often enough I want to assign new values
to the elements in the list. I have no need for the old value, that
is also provided by enumerate.

-- 
Antoon Pardon


From neuhauser+python-list#python.org at sigpipe.cz  Mon Apr 11 19:17:17 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Tue, 12 Apr 2005 01:17:17 +0200
Subject: semicolons
In-Reply-To: <425AF6AB.900@mage.hu>
References: <425AF6AB.900@mage.hu>
Message-ID: <20050411231717.GE98521@isis.sigpipe.cz>

# mage at mage.hu / 2005-04-12 00:14:03 +0200:
>        Hello,
> 
> I amafraid of I will stop using semicolons in other languages after one
> or two months of python.

    Writing in multiple programming languages is just like writing or
    speaking in multiple human languages: you just need to obey the
    rules of the different grammars and pronounciations.

> However I see that python simply ignores the semicolons atd the end of
> the lines.

    That's not true.
 
> What's your advice? I don't want to write full-of-typo php scripts

    Then don't.

> but I see the logic of the python syntax too.

    Different languages have different "logics". You need to stick to
    the right set of rules appropriate for the language you're using.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From g.brandl at gmx.net  Sun Apr  3 14:23:16 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Sun, 03 Apr 2005 20:23:16 +0200
Subject: "specialdict" module
In-Reply-To: <mailman.1261.1112549114.1799.python-list@python.org>
References: <3bamhhF6j009lU1@individual.net>
	<mailman.1261.1112549114.1799.python-list@python.org>
Message-ID: <3baqjlF6gqhbaU1@individual.net>

Jeff Epler wrote:
> The software you used to post this message wrapped some of the lines of
> code.  For example:
>>     def __delitem__(self, key):
>>         super(keytransformdict, self).__delitem__(self,
>> self._transformer(key))

Somehow I feared that this would happen.

> In defaultdict, I wonder whether everything should be viewed as a
> factory:
>     def setdefaultvalue(self, value):
>         def factory(): return value
>         self.setdefaultfactory(factory)

That's a reasonable approach. __init__ must be changed too, but this
shouldn't hurt too badly.

> and the "no-default" mode would either cease to exist, or 
>     def cleardefault(self):
>         def factory(): 
>             raise KeyError, "key does not exist and no default defined"
>         self.setdefaultfactory(factory)
> (too bad that the key isn't available in the factory, this degrades the
> quality of the error messge)

That can be worked around with a solution in __getitem__, see below.

> if so, __getitem__ becomes simpler:
>     __slots__ = ['_default']
>     def __getitem__(self, key):
>       try:
>           return super(defaultdict, self).__getitem__(key)
>       except KeyError:
>           return self.setdefault(key, apply(*self._default))

You are peculating the kwargs. Also, apply() is on the verge of being
deprecated, so better not use it.

def __getitem__(self, key):
    try:
        return super(defaultdict, self).__getitem__(key)
    except KeyError, err:
        try:
            return self.setdefault(key,
                      self._default[0](*self._default[1],
                                       **self._default[2]))
        except KeyError:
            raise err

Although I'm not sure whether KeyError would be the right one to raise
(perhaps a custom error?).

> I don't ever have an itch for sorted dictionaries, as far as I can
> remember, and I don't immediately understand the use of
> keytransformdict.  Can you give an example of it?

See the thread "Case-insensitive dict, non-destructive, fast, anyone?",
starting at 04/01/05 12:38.

mfg
Georg


From wweston at att.net  Fri Apr  8 16:19:14 2005
From: wweston at att.net (wes weston)
Date: Fri, 08 Apr 2005 20:19:14 GMT
Subject: Rotating arbitrary sets of elements within a list
In-Reply-To: <1112971150.361681.313100@o13g2000cwo.googlegroups.com>
References: <1112971150.361681.313100@o13g2000cwo.googlegroups.com>
Message-ID: <6HB5e.542064$w62.57395@bgtnsc05-news.ops.worldnet.att.net>

phil_nospam_schmidt at yahoo.com wrote:
> I'm trying to come up with a good algorithm to do the following:
> 
> Given a list 'A' to be operated on, and a list 'I' of indices into 'A',
> rotate the i'th elements of 'A' left or right by one position.
> 
> Here's are some examples:
> 
> A = [a, b, c, d, e, f]
> I = [0, 3, 4]
> 
> rotate(A, I, 'left') --> [b, c, d, e, f, a]
> rotate(A, I, 'right') --> [b, a, c, f, d, e]
> 
> I = [1, 3, 4]
> 
> rotate(A, I, 'left') --> [b, a, d, e, c, f]
> rotate(A, I, 'right') --> [a, c, b, f, d, e]
> 
> Any ideas?
> 


class CBuf:
     def __init__(self,list=[]):
         self.List = list
         self.Front = 0
     def ActualIndexGet(self,index):
         return (self.Front + index) % len(self.List)
     def ValueGet(self,index):
         return self.List[self.ActualIndexGet(index)]
     def Rotate(self,dir):
         if dir == 'L':
             self.Front += 1
         else:
             self.Front -= 1
         self.Front = self.Front % len(self.List)
     def Show(self):
         i = self.Front
         while 1:
             print self.List[i]," ",
             i = (i+1) % len(self.List)
             if i == self.Front:
                 break
         print


b = CBuf(['a','b','c','d','e','f'])
b.Show()
b.Rotate('L')
b.Show()
b.Rotate('L')
b.Show()


 >>> ================================ RESTART ================================
 >>>
a   b   c   d   e   f
b   c   d   e   f   a
c   d   e   f   a   b
 >>>



From jason.w.kane at gmail.com  Tue Apr 12 18:07:00 2005
From: jason.w.kane at gmail.com (Kane)
Date: 12 Apr 2005 15:07:00 -0700
Subject: Web Application Client Module
In-Reply-To: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
Message-ID: <1113342878.386567.283890@g14g2000cwa.googlegroups.com>

Since you need javascript the cheap-n-dirty approach (xml parser, gui
library of your choice and just enough widget logic/https for your app
to work) is a no-go.  I don't know of a python  library with html
rendering and javascript (and https support could easily be another
barrier).

Another option starts with Mozilla/Firefox; just strip away all
unnecessary GUI 'features' with a customized XUL.  I imagine you could
effectivly hardcode the 'home' URL and make the location bar read-only
without great effort.  That will give you HTTPS support, html rendering
and full javascript fairly painlessly.

Course' if your app was designed and tested for IE only you'll have to
wrap the MS rendering/javascript IE libraries.  Plenty of commercial
programs do it (AIM and Quickbooks come to mind) but I've never tried
and suspect there are serious licencing hurdles.



From jason.mobarak at gmail.com  Thu Apr 28 22:52:14 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 28 Apr 2005 19:52:14 -0700
Subject: Trying to write CGI script with python...
In-Reply-To: <mailman.9.1114734748.14961.python-list@python.org>
References: <mailman.9.1114734748.14961.python-list@python.org>
Message-ID: <1114743134.032231.94960@g14g2000cwa.googlegroups.com>

Probably going to need more information about how mplayer is not being
accessed correctly.

CGI uses the shell environment to pass web information to a program...
so maybe this is messing up mplayer. You'll need to augment or wrap
your partners program in order to give you more information about
what's failing (e.g. wrap the call to mplayer in a try/except use the
traceback module to format a traceback if your CGI server is swallowing
it).



From eugene at boardkulture.com  Wed Apr 20 14:56:47 2005
From: eugene at boardkulture.com (EuGeNe)
Date: Wed, 20 Apr 2005 20:56:47 +0200
Subject: Python instances
In-Reply-To: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
Message-ID: <d468os$2g2$1@apollon.grec.isp.9tel.net>

henrikpierrou at hotmail.com wrote:
> Hi,
> 
> How do python instances work?
> Why does the code at the end of my posting produce this output:
> 
> list in a:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
> list in b:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
> 
> instead of
> 
> list in a:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
> list in b:
> []
> 
> ----------------------------
> 
> class MyClass:
>     list = []
> 
>     def add(self, x):
>         self.list.append(x)
> 
>     def printer(self):
>         print self.list
> 
> a = MyClass()
> b = MyClass()
> 
> for n in range(10):
>     a.add(n)
> 
> print "list in a:"
> a.printer()
> print "list in b:"
> b.printer()
> 
> /H
> 

because list is a class member not an instance member (not sure about 
the vocabulary) if in __init__ you set self.list=[] you'll get the 
result you want! By declaring list=[] in the class it is shared between 
all instances!

-- 
EuGeNe

[----
www.boardkulture.com
www.actiphot.com
www.xsbar.com
----]


From prabapython at yahoo.co.in  Fri Apr  1 02:24:42 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Fri, 1 Apr 2005 08:24:42 +0100 (BST)
Subject: Ternary Operator in Python
In-Reply-To: 6667
Message-ID: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>

Dear All,
    I am new to Python.  I want to know how to
work with ternary operator in Python.  I cannot
find any ternary operator in Python.  So Kindly
clear my doubt regarding this


		
__________________________________ 
Yahoo! Messenger 
Show us what our next emoticon should look like. Join the fun. 
http://www.advision.webevents.yahoo.com/emoticontest


From radam2_ at _tampabay.rr.com  Sun Apr 17 02:31:16 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Sun, 17 Apr 2005 06:31:16 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
Message-ID: <7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>

On Sat, 16 Apr 2005 17:25:00 -0700, Brian Sabbey
<sabbey at u.washington.edu> wrote:

>> You can already do this, this way.
>>
>>>>> def f(thunk):
>> ...     before()
>> ...     thunk()
>> ...     after()
>> ...
>>>>> def before():
>> ...     print 'before'
>> ...
>>>>> def after():
>> ...     print 'after'
>> ...
>>>>> def stuff():
>> ...     print 'stuff'
>> ...
>>>>> def morestuff():
>> ...     print 'morestuff'
>> ...
>>>>> f(stuff)
>> before
>> stuff
>> after
>>>>> f(morestuff)
>> before
>> morestuff
>> after
>>>>>
>>
>> This works with arguments also.
>
>Yes, much of what thunks do can also be done by passing a function 
>argument.  But thunks are different because they share the surrounding 
>function's namespace (which inner functions do not), and because they can 
>be defined in a more readable way.

Generally my reason for using a function is to group and separate code
from the current name space.  I don't see that as a drawback.

Are thunks a way to group and reuse expressions in the current scope?
If so, why even use arguments?  Wouldn't it be easier to just declare
what I need right before calling the group?  Maybe just informally
declare the calling procedure in a comment.

def thunkit:	  # no argument list defines a local group.
	# set thunk,x and y before calling.      
	before()
	result = thunk(x,y)
	after()

def foo(x,y):
	x, y = y, x
	return x,y

thunk = foo
x,y = 1,2
do thunkit
print result

-> (2,1)

Since everything is in local name space, you  really don't need to
pass arguments or return values.  

The 'do' keyword says to evaluate the group.  Sort of like eval() or
exec would, but in a much more controlled way.  And the group as a
whole can be passed around by not using the 'do'.  But then it starts
to look and act like a class with limits on it.  But maybe a good
replacement for lambas?

I sort of wonder if this is one of those things that looks like it
could be useful at first, but it turns out that using functions and
class's in the proper way, is also the best way. (?)

>You're right that, in this case, it would be better to just write 
>"f(stuff, 27, 28)".  That example was just an attempt at describing the 
>syntax and semantics rather than to provide any sort of motivation.  If 
>the thunk contained anything more than a call to 'stuff', though, it would 
>not be as easy as passing 'stuff' to 'f'.  For example,
>
>do f(27, 28):
> 	print stuff()
>
>would require one to define and pass a callback function to 'f'.  To me, 
>'do' should be used in any situation in which a callback *could* be used, 
>but rarely is because doing so would be awkward.  Probably the simplest 
>real-world example is opening and closing a file.  Rarely will you see 
>code like this:
>
>def with_file(callback, filename):
> 	f = open(filename)
> 	callback(f)
> 	f.close()
>
>def print_file(file):
> 	print file.read()
>
>with_file(print_file, 'file.txt')
>
>For obvious reasons, it usually appears like this:
>
>f = open('file.txt')
>print f.read()
>f.close()
>
>Normally, though, one wants to do a lot more than just print the file. 
>There may be many lines between 'open' and 'close'.  In this case, it is 
>easy to introduce a bug, such as returning before calling 'close', or 
>re-binding 'f' to a different file (the former bug is avoidable by using 
>'try'/'finally', but the latter is not).  It would be nice to be able to 
>avoid these types of bugs by abstracting open/close.  Thunks allow you to 
>make this abstraction in a way that is more concise and more readable than 
>the callback example given above:

How would abstracting open/close help reduce bugs?  

I'm really used to using function calls, so anything that does things
differently tend to be less readable to me. But this is my own
preference.  What is most readable to people tends to be what they use
most. IMHO

>do f in with_file('file.txt'):
> 	print f.read()
>
>Thunks are also more useful than callbacks in many cases since they allow 
>variables to be rebound:
>
>t = "no file read yet"
>do f in with_file('file.txt'):
> 	t = f.read()
>
>Using a callback to do the above example is, in my opinion, more 
>difficult:
>
>def with_file(callback, filename):
> 	f = open(filename)
> 	t = callback(f)
> 	f.close()
> 	return t
>
>def my_read(f):
> 	return f.read()
>
>t = with_file(my_read, 'file.txt')

Wouldn't your with_file thunk def look pretty much the same as the
callback?

I wouldn't use either of these examples.  To me the open/read/close
example you gave as the normal case would work fine, with some basic
error checking of course. Since Python's return statement can handle
multiple values, it's no problem to put everything in a single
function and return both the status with an error code if any, and the
result.  I would keep the open, read/write, and close statements in
the same function and not split them up.

>> When I see 'do', it reminds me of 'do loops'. That is 'Do' involves
>> some sort of flow control.  I gather you mean it as do items in a
>> list, but with the capability to substitute the named function.  Is
>> this correct?
>
>I used 'do' because that's what ruby uses for something similar.  
>

I could see using do as an inverse 'for' operator.  Where 'do' would
give values to items in a list, verses taking them from a list. I'm
not exactly sure how that would work. Maybe...  

def fa(a,b):
	return a+b
def fb(c,d):
	return c*b
def fc(e,f):
	return e**f

fgroup:
	fa(a,b)
	fb(c,d)
	fc(e,f)

results = do 2,3 in flist

print results
->  (5, 6, 8)

But this is something else, and not what your thunk is trying to do.



So it looks to me you have two basic concepts here.  

(1.) Grouping code in local name space.

I can see where this could be useful. It would be cool if the group
inherited the name space it was called with.  

(2.) A way to pass values to items in the group. 

Since you are using local space, that would be assignment statements
in place of arguments.

Would this work ok for what you want to do?

def with_file:				# no argument list, local group.
	f = open(filename)
	t = callback(f)
	f.close

def my_read(f):
 	return f.read()

callback = my_read
filename = 'filename'
do with_file


Something I've noticed is that there seems to be a trend to want to
put things behind other things as with decorators.

do with_file:
	filename = 'filename'
	callback = my_read


This in my opinion is yet a third item.  Could be that 'do' could also
relate to that as in do 'a' after 'b'.

do:							# do this after next group
	do with_file			# do group named with_file
after:						# don't like 'after', but what else?
	filename = 'filename'
	callback = my_read


Any way, this if just food for thought,  I'm really undecided on most
of this.

Cheers,
Ron














  





 


	


From peter at engcorp.com  Tue Apr 19 17:03:42 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 19 Apr 2005 17:03:42 -0400
Subject: poll: does name conventions in python matters?
In-Reply-To: <mailman.2132.1113941497.1799.python-list@python.org>
References: <mailman.2132.1113941497.1799.python-list@python.org>
Message-ID: <0O6dnQY2MsOZ7vjfRVn-gQ@powergate.ca>

vegetax wrote:
> in python it is common to see naming
> inconsistencies ,methods,modules,packages,classes with names in every
> posible style:
> thisisalongmethod
> ThisIsALongMethod
> thisIsALongMethod
> this_is_a_long_method
> and even This_Is_A_Long_Method
> All over the place,even within one module!

You certainly won't find most of those in a single
module, at least not in the standard library. You
might find a couple.  Check out the PEP(s) on the
topic, and just follow the conventions of whatever
code you are working with.

If you are working with new code and need to choose
something from scratch, go with your personal preference
and be consistent.

If all the above fail, use "names_like_this" or
"namesLikeThis".  If you really need somebody else
to tell you what to use: use the latter, because
I told you to. ;-)

-Peter


From keir.robinson at gmail.com  Thu Apr 21 09:49:17 2005
From: keir.robinson at gmail.com (keirr)
Date: 21 Apr 2005 06:49:17 -0700
Subject: Strings
References: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
Message-ID: <1114091357.035894.292280@f14g2000cwb.googlegroups.com>

I'd use the int and chr casts.  e.g.,

new_string = ""
a = '012'
new_string += chr(int(a))

Just in case the 012 is an octal code I'll mention that to cast to int
in general you can pass the base, as in int('034',8) or int('AF',16)

Cheers,

 Keir.



From kay.schluehr at gmx.net  Sun Apr 10 09:29:32 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Apr 2005 06:29:32 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1632.1113130699.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<1113126605.315861.44730@z14g2000cwz.googlegroups.com>
	<mailman.1632.1113130699.1799.python-list@python.org>
Message-ID: <1113139772.023037.153620@l41g2000cwc.googlegroups.com>


Fredrik Lundh wrote:
> Kay Schluehr wrote:
>
> > You have already given the arguments in Your discussion above. I
> > personally never use the standard-lib XML parser, but pyRXP/pyRXPU
> > which is fast, stores objects in pythonic list/tuple/dict
structures
> > and provides access by lazy tagging
>
> it's also GPL:ed, and the namespace support is totally broken.  there
> are faster solutions out there with Python-compatible licenses.
>
> </F>

Interesting. Which implementation "out there" ( so not in the std-lib )
that maps the whole XML into an internal structure and makes it easily
accessible is currently faster? Remark: I have a clearly limited
perspective on this issue. I did not recognize that namespaces are
broken in pyRXP because the XML-docs with which I deal in my company
are used for storing data that are used in industrial production where
one XML-doc matches one system. Those XML are tool-generated and used
as a replacement for initialization-files ( size ~ 1MB - 5MB ) and are
never broken because they are self contained.

Regards,
Kay



From dalke at dalkescientific.com  Wed Apr 20 18:50:43 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Wed, 20 Apr 2005 22:50:43 GMT
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
	<3cm9r2F6nif67U1@individual.net>
	<d44vgg$jmr$04$1@news.t-online.com> <42660fc2.42093557@news.oz.net>
	<d455oo$7et$02$1@news.t-online.com> <42662dc9.49780670@news.oz.net>
	<mailman.2202.1114027350.1799.python-list@python.org>
Message-ID: <pan.2005.04.20.22.50.45.945404@dalkescientific.com>

Michael Spencer wrote:
> I have wrapped up my current understanding in the following class:

I see you assume that only \w+ can fit inside of a %()
in a format string.  The actual Python code allows anything
up to the balanced closed parens.

>>> class Show:
...   def __getitem__(self, text):
...     print "Want", repr(text)
... 
>>> "%(this(is)a.--test!)s" % Show()
Want 'this(is)a.--test!'
'None'
>>> 

I found this useful for a templating library I once wrote
that allowed operations through a simple pipeline, like

   %(doc.text|reformat(68)|indent(4))s

				Andrew
				dalke at dalkescientific.com



From evenprimes at gmail.com  Mon Apr 18 14:45:06 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Mon, 18 Apr 2005 14:45:06 -0400
Subject: packages
In-Reply-To: <4263FC93.5090104@mage.hu>
References: <4263FC93.5090104@mage.hu>
Message-ID: <f03f4fdf050418114534974876@mail.gmail.com>

Check out http://docs.python.org/tut/node8.html#SECTION008400000000000000000

Basically a package is a directory with one or more Python modules
along with the "special" module called __init__.py.

Chris

On 18/04/05, Mage <mage at mage.hu> wrote:
>       Hello,
> 
> I read about modules and packages in the tutorial. I think I understand
> how to use packages and modules, even I know how to create a module (as
> far I understand it's a simple .py) file , but I don't know how can I
> create a package and when should I do it.
> 
> Where should I look for more information?
> 
>       Mage
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



-- 
"I was born not knowing and have had only a little time to change that
here and there." -- Richard Feynman


From simon.brunning at gmail.com  Wed Apr 20 08:48:16 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 13:48:16 +0100
Subject: building a small calculator
In-Reply-To: <1114000897.084753.80950@l41g2000cwc.googlegroups.com>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
	<mailman.2168.1113999910.1799.python-list@python.org>
	<1114000275.227950.50870@f14g2000cwb.googlegroups.com>
	<mailman.2171.1114000794.1799.python-list@python.org>
	<1114000897.084753.80950@l41g2000cwc.googlegroups.com>
Message-ID: <8c7f10c6050420054847f5cd6@mail.gmail.com>

On 20 Apr 2005 05:41:37 -0700, aleksander.helgaker at gmail.com
<aleksander.helgaker at gmail.com> wrote:
> Sorry. This is my first day using Python.

Nothing to apologise for. We were all new to Python once.

> Is there an equivelent to the goto command? I want to find some way to
> take the user back to the main menu.

Funny you should mention that...

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/832906c6122dc137/f4cca2f994881220#f4cca2f994881220

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From c3poptuse at yahoo.com  Thu Apr 14 05:27:26 2005
From: c3poptuse at yahoo.com (c3poptuse at yahoo.com)
Date: 14 Apr 2005 02:27:26 -0700
Subject: Supercomputer and encryption and compression @ rate of 96%
Message-ID: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>

Supercomputer and encryption and compression @ rate of 96%

Take a document then or a 3D matrix document change it two random or
binary code or just a program for 0's and 1's and fold it over and over
like a piece of paper then having the 1 and 0 add each other or the
0,1's canceling each other out 1+0=0 and 0+1=1 1+1=1 0+0=0 if you gave
the folds addresses like on a spread sheet there would be no math.
First A 1-24  would fold to k 1-24 down.(See Example A )  Then at F1-24
down two k 1-24 ( See example B )  If you written a very long letter
and then change it two binary code it would look like this.
   123456789.............24
 a.01010101010101010101010
 b.10010101010101010101010
 c.01010101001010101010010
 e.00010101000101010101010
 f.10010101010100101010101 First A 24  would fold to k 24 down
 g.01010101010100001100101              See Example A
 h.01001010101010101010111
 I.11110111001101010101010
 j.01010101010101010101010
 k.10101010101010101010101


       See Example A
   123456789.............24
 f.10010101010100101010101
 g.01010101010100001100101
 h.01001010101010101010111 Then at F1-24 down two k 1-24
 I.11110111001101010101010
 j.01010101010101010101010
 k.10101010101010101010101


      See example B
   123456789.............24
 I.11110111001101010101010
 j.01010101010101010101010 Then from I 1-24 to K 1-24
 k.10101010101010101010101

   123456789.............24
 j.01010101010101010101010  Then from j-24 to j-1

   123456789...
 j.010101010101             Then from j-12 to j-1

   123456
 j.010101                   Then from j-6 to j1

   123
 j.010                      Then from j-3 to j1

   12
 j.01                        Then from j-2 to j1


 j.0                         Then you would have
                             1 bit to transfer over the
                             Internet
The bit sent would be 0 and the key code would be F1-24,k 1-24,
I 1-24,K 1-24,j24,j1,j12,j1,j6,j1,j3,j1,j2,j1 and would unzip or be new
encryption you could encrypt or compress 100 terabits down to 1 bit of
information. Now if you take this idea from my web site you could make
this allot more complex and unbreakable. Data encryption 360 degrees
rotation document 90 degrees and encrypt on every angel then 45 degrees
change it two binary code do it again and again and fold it over like a
piece of paper then having the one's and zero cancel each other out. In
theory you could send a 100 terabit program to someone's computer and
have it unzip and run and install or make
A computer processor like the new 64 bit AMD have the bit unzip into a
large ram drive and buffer use one half of the 64 bit processor decode
the message and the main 64 bit run the numbers. Another way of doing
this is to have a parallel computers with using one of the processes
run the compressed 1 bit of information give the uncompressed a address
on the ram drive to change and not even go threw the processor and then
with different information on each machine compare and run statistics
on information on a 45 tflops supercomputer and turn that 45 tflops
computer into a 1 bit = 100,000 terabits to infinite as long as you
have the ram for storage! with my calculations 45 tflops wouldn't
matter any more it would be how much data you have on a 32bit operating
system changing that to a 1 bit system it would be 32 * 45tflops would
= 1440 tflops   Matter moves so fast that it intergreats and
deintergreats faster then any speed we can see it like water from a
hose at real close speed it moves in -------- lines.



From peter at somewhere.com  Thu Apr 21 11:20:11 2005
From: peter at somewhere.com (Peter Maas)
Date: Thu, 21 Apr 2005 17:20:11 +0200
Subject: goto statement
In-Reply-To: <d45kna$f1o$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
Message-ID: <d48gbv$52l$1@swifty.westend.com>

Maxim Kasimov schrieb:
> but what if i just can't to do this becouse i'm working thrue ssh, and 
> have to use only installed editors (such as vi)

- at first line of block enter: ma (mark line as 'a')
- go to last line of block
- enter :'a,.s/^/###/ (insert 3 comment chars at begin of line,
   starting from line marked as 'a' to current line)

:)

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From cdkrug at worldnet.att.net  Thu Apr 21 14:14:29 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Thu, 21 Apr 2005 18:14:29 GMT
Subject: Is there a package with convolution and related methods?
References: <YTO9e.98425$cg1.44378@bgtnsc04-news.ops.worldnet.att.net>
	<qnkpswoyrwy.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <94S9e.620678$w62.595301@bgtnsc05-news.ops.worldnet.att.net>

On Thu, 21 Apr 2005 13:13:17 -0400, David M. Cooke
<cookedm+news at physics.mcmaster.ca> wrote:
> Charles Krug <cdkrug at worldnet.att.net> writes:
> 
>> List:
>>
>> Is there a Python package with Convolution and related methods?
>>
>> I'm working on modeling some DSP processes in Python.  I've rolled one
>> up, but don't feel much like reinventing the wheel, especially if
>> there's already something like "Insanely Efficient FFT for Python"
>> already.
>>
>> Thanks
> 
> You most certainly want to look at the numerical python packages
> Numeric and numarray (http://numeric.scipy.org/) for array
> manipulations, and scipy (http://scipy.org) has wraps for FFTW (Fast
> Fourier Transform in the West).
> 

Great, thanks.

Figured someone had done it.



From gfyho at yahoo.com  Thu Apr 21 08:06:20 2005
From: gfyho at yahoo.com (Gary)
Date: 21 Apr 2005 05:06:20 -0700
Subject: Design advice for unit test asserters
Message-ID: <1114085180.425079.302580@z14g2000cwz.googlegroups.com>

I'm working on a project where I'm doing various file manipulations.
I'm not familiar with the idioms are common or good for this situation,
so I'd appreciate advice and suggestions.

Question 1:  A number of checks apply to a set of files.  So I'm
wondering whether to have something like:

     def test_SomeTest(...):
         ...
         self.AssertAllFilesExist(fileList)

or

     def test_SomeTest(...):
         ...
         [ self.AssertFileExists(f) for f in fileList ]

In a statically typed, tiny method design approach, the former would be
preferred.  But in Python the latter seems easy enough and more
natural.  And I'm wondering if I'm missing some other Python idiom that
would be even better.

Question 2:  A more complicated example:  My object defines its own
conditions that can be queried, e.g.

     def test_SomeTest(...):
         myObject.DoSomething()
         self._assert(myObject.isFileTypeQ(someFile))

but the parameter someFile is often an expression that should be
encapsulated into the assertion.  This gives me two possibilities:  I
can define a stand-alone query that takes myObject as a parameter:

     def AssertIsTypeQ(theObjectBeingTested, rawFileInfo):
         someComputedFile = DoStuff(rawFileInfo)
         return theObjectBeingTested.isFileTypeQ(someComputedFile)

and then call it from within various tests as:

     self._assert(AssertIsFileTypeQ(myObject, someFile)

or I can define an intermediate unit test case:

     class myTester(unittest.TestCase):
        def AssertIsFileTypeQ(self, rawFileInfo):
          someComputedFile = DoStuff(rawFileInfo)
          self.theObject.isFileTypeQ(someComputedFile)

and then define my test cases as

     class test_MyObjectX(myTester):

       def test_Sometest():
          self.theObject = ClassBeingTested()
          self.theObject.DoSomething()
          self.AssertIsFileTypeQ(someFile)

With these simple cases, this seems like six of one and a half dozen of
the other.  But the problem grows, in that there are several of these
assertions, and they often need to be applied to lists of things.  At
one point I was getting really complicated by abstracting out both the
looping and the computed file names, passing in a functor containing
the simple test and the name (for the message).  I gave up on this and
now I'm leaning towards the first, but again, I wonder if I'm missing a
better or more natural way to solve this problem.

Thanks,

Gary



From radam2 at tampabay.rr.com  Mon Apr 25 10:07:25 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Mon, 25 Apr 2005 14:07:25 GMT
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <4269397e.249385737@news.oz.net>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
	<1114188913.806103.120830@f14g2000cwb.googlegroups.com>
	<4269397e.249385737@news.oz.net>
Message-ID: <xQ6be.23972$5f.16796@tornado.tampabay.rr.com>

Bengt Richter wrote:

> I don't know what pythonw.exe does with std i/o that hasn't been intercepted,
> but I would think it could be handy to have it force a console window, and maybe
> have a pythonw.exe command line option to dump either or both stdout and stderr
> silently. That way by default you'd see errors etc. unless you opt now to.
> (I should check, maybe they've thought of this already. It's really easy to do)
> ... Nope, I don't see it in python -h (and pythonw -h doesn't show anything ;-)

Using Editpad Pro to capture std out to an edit panel, I get....

usage: Pythonw [option] ... [-c cmd | file | -] [arg] ...
Options and arguments (and corresponding environment variables):
-c cmd : program passed in as string (terminates option list)
-d     : debug output from parser (also PYTHONDEBUG=x)
-E     : ignore environment variables (such as PYTHONPATH)
-h     : print this help message and exit
-i     : inspect interactively after running script, (also PYTHONINSPECT=x)
          and force prompts, even if stdin does not appear to be a terminal
-O     : optimize generated bytecode (a tad; also PYTHONOPTIMIZE=x)
-OO    : remove doc-strings in addition to the -O optimizations
-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew
-S     : don't imply 'import site' on initialization
-t     : issue warnings about inconsistent tab usage (-tt: issue errors)
-u     : unbuffered binary stdout and stderr (also PYTHONUNBUFFERED=x)
          see man page for details on internal buffering relating to '-u'
-v     : verbose (trace import statements) (also PYTHONVERBOSE=x)
-V     : print the Python version number and exit
-W arg : warning control (arg is action:message:category:module:lineno)
-x     : skip first line of source, allowing use of non-Unix forms of #!cmd
file   : program read from script file
-      : program read from stdin (default; interactive mode if a tty)
arg ...: arguments passed to program in sys.argv[1:]
Other environment variables:
PYTHONSTARTUP: file executed on interactive startup (no default)
PYTHONPATH   : ';'-separated list of directories prefixed to the
                default module search path.  The result is sys.path.
PYTHONHOME   : alternate <prefix> directory (or <prefix>;<exec_prefix>).
                The default module search path uses <prefix>\lib.
PYTHONCASEOK : ignore case in 'import' statements (Windows).




From chirayuk at gmail.com  Sat Apr  2 18:27:55 2005
From: chirayuk at gmail.com (chirayuk)
Date: 2 Apr 2005 15:27:55 -0800
Subject: Corectly convert from  %PATH%=c:\\X; "c:\\a;
	b"  TO  ['c:\\X', 'c:\\a; b']
Message-ID: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>

Hi,

I am trying to treat an environment variable as a python list - and I'm
sure there must be a standard and simple way to do so. I know that the
interpreter itself must use it (to process $PATH / %PATH%, etc) but I
am not able to find a simple function to do so.

os.environ['PATH'].split(os.sep) is wrong on Windows for the case when
PATH="c:\\A;B";c:\\D;
where there is a ';' embedded in the quoted path.

Does anyone know of a simple way (addons ok) which would do it in a
cross platform way? If not - I will roll my own. My search has shown
that generally people just use the simple split menthod as above and
leave it there but it seemed like such a common operation that I
believe there must be a way out for it which I am not seeing.

Thanks,
Chirayu.



From rkern at ucsd.edu  Mon Apr 25 02:16:16 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 24 Apr 2005 23:16:16 -0700
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <4u2dnTeE0-PBFfHfRVn-vQ@comcast.com>
References: <86ll77pgqz.fsf@guru.mired.org>	<mailman.2430.1114408769.1799.python-list@python.org>
	<4u2dnTeE0-PBFfHfRVn-vQ@comcast.com>
Message-ID: <d4i1m2$eoh$1@sea.gmane.org>

Steven Bethard wrote:
> Robert Kern wrote:
> 
>> Mike Meyer wrote:
>>
>>> Ok, we've added list comprehensions to the language, and seen that
>>> they were good. We've added generator expressions to the language, and
>>> seen that they were good as well.
>>>
>>> I'm left a bit confused, though - when would I use a list comp instead
>>> of a generator expression if I'm going to require 2.4 anyway?
>>
>> Never. If you really need a list
>>
>> list(x*x for x in xrange(10))
> 
> Not quite true.  If you discovered the unlikely scenario that the 
> construction of a list from the generator expression was an efficiency 
> bottleneck, you might choose a list comprehension -- they're slightly 
> faster when you really do want a list:
> 
> $ python -m timeit "list(x*x for x in xrange(10))"
> 100000 loops, best of 3: 6.54 usec per loop
> 
> $ python -m timeit "[x*x for x in xrange(10)]"
> 100000 loops, best of 3: 5.08 usec per loop

Okay, okay, *almost* never.

However, I don't expect that speed relationship to hold past Python 2.4.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From jstroud at mbi.ucla.edu  Mon Apr 25 14:54:05 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 25 Apr 2005 11:54:05 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <1114454884.549187.122440@o13g2000cwo.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
Message-ID: <200504251154.05939.jstroud@mbi.ucla.edu>

On Monday 25 April 2005 11:48 am, so sayeth Xah Lee:
> I have produced my doc.
> ( http://xahlee.org/perl-python/python_re-write/lib/module-re.html )
>
> isn't there a hundred dollars due to me?
>
Yes, we have put it in an envelop that is sitting between the dumpster and the 
Dairy Queen in Dalhart, Texas. 

James


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

http://www.jamesstroud.com/


From johnlichtenstein at gmail.com  Tue Apr 26 21:15:51 2005
From: johnlichtenstein at gmail.com (johnlichtenstein at gmail.com)
Date: 26 Apr 2005 18:15:51 -0700
Subject: compile shebang into pyc file
In-Reply-To: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
Message-ID: <1114564551.358418.15350@g14g2000cwa.googlegroups.com>

Is there some reason why you want to run the .pyc file, rather than the
.py file? If you start the script with

#! /usr/bin/env python

Then if the file has the execution permission set, typing the file name
(foo.py) will make the script call up the Python interpreter on its
own.



From RonGrossi_38193 at yahoo.com  Sun Apr 10 13:55:10 2005
From: RonGrossi_38193 at yahoo.com (RonGrossi_38193 at yahoo.com)
Date: 10 Apr 2005 10:55:10 -0700
Subject: =?iso-8859-1?q?THE_GREATEST_NEWS_EVER!!!_=B0=BA=B7=2E=5F=2E=5F?=
	=?iso-8859-1?q?=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F?=
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	=?iso-8859-1?q?=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E?=
	=?iso-8859-1?q?=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0?=
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	=?iso-8859-1?q?=5F=2E=5F=2E=B7=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7?=
	=?iso-8859-1?q?=BA=B0=60=B0=BA=B7=2E=5F=2E=5F=2E=B7=BA=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=5F=2E=5F=2E=B7_=28newsgroup-post_130=29?=
Message-ID: <1113155710.250139.246390@o13g2000cwo.googlegroups.com>

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named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrong doing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.



Servant of the Lord Jesus Christ,
Internet Evangelist
Ronald L. Grossi


____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.bibledatabase.net



From peter at engcorp.com  Tue Apr  5 09:17:25 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 09:17:25 -0400
Subject: Is it possible to distinguish between system environment
 variables and the user ones?
In-Reply-To: <mailman.1368.1112690534.1799.python-list@python.org>
References: <mailman.1368.1112690534.1799.python-list@python.org>
Message-ID: <F6idnRabaJ14Es_fRVn-2g@powergate.ca>

could ildg wrote:
> To a environment variable in Windows, can python know if it is a
> system environment
> variable or a current-user environment variable?

Not just by using the "os.environ" approach.
You would have to resort to the "pywin32"
extensions.  Check the Python Cookbook using
Google for "environment variable" recipes and
you'll get a good start on it.

You'll also require a bit of Win32-specific
knowledge, since this entire concept is not
a cross-platform one.

-Peter


From t-meyer at ihug.co.nz  Mon Apr 11 19:16:18 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Tue, 12 Apr 2005 11:16:18 +1200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB006E@its-xchg4.massey.ac.nz>

[problems with dependency on msvr71.dll snipped]

One option is to create a Windows Python 2.4 installer that includes a
Python not built with MSVC7 - for example gcc or MSVC6 - which doesn't have
the dependency on mscvr71.dll.  Both VC6 and gcc are feasible, although
there may be a reasonable amount of work required.

If the installer proved popular, then I'm sure the python-dev people could
be convinced (for 2.5, perhaps) that there should be an official release of
this type, much like there's a separate 64 bit installer available.
(Assuming that patches could be submitted that made the build process as
seamless as the existing one).

This seems a much more achievable goal than anything involving a meeting
with Microsoft...

=Tony.Meyer



From cfbolz at gmx.de  Tue Apr 12 10:15:42 2005
From: cfbolz at gmx.de (cfbolz)
Date: 12 Apr 2005 07:15:42 -0700
Subject: HELP ! Anybody knows where the stackless python website is ?
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<d5uxzk7q.fsf@python.net> <42185D66.1020203@v.loewis.de>
	<op.so19tmaeqfv3if@localhost>
Message-ID: <1113315342.809621.14220@l41g2000cwc.googlegroups.com>

Hi!

Pierre-Fr?d?ric Caillaud wrote:
> I've been trying desperately to access http://www.stackless.com but
> it's been down, for about a week now !

The stackless webpage is working again.

Regards,

Carl Friedrich Bolz



From fredrik at pythonware.com  Thu Apr 14 11:44:56 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 14 Apr 2005 17:44:56 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>	<425e47a9$0$26352$db0fefd9@news.zen.co.uk><mailman.1886.1113479564.1799.python-list@python.org>
	<425e8d34$0$2589$da0feed9@news.zen.co.uk>
Message-ID: <d3m2v1$b4h$1@sea.gmane.org>

Will McGugan wrote:

> Muchas gracias. Although there may be a bug. I compressed my Evanescence
> albumn, but after decompression it became the complete works of Charles

strange.  the algorithm should be reversible.  sounds like an operating
system bug.  what system are you using?

</F>





From bokr at oz.net  Fri Apr 22 14:39:15 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 18:39:15 GMT
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
	<1114188913.806103.120830@f14g2000cwb.googlegroups.com>
Message-ID: <4269397e.249385737@news.oz.net>

On 22 Apr 2005 09:55:13 -0700, pyguy2 at gmail.com wrote:

>>This change is NOT a good idea!!
>I agree the .pyw shortcut method is better. However, if you are willing
>to lose
>stdin,stdout,stderr and really never want a console window to pop up, I
>do not see how it is a disasterous change. You can still run python.exe
>on your py files when you want  to test your code.
Sure, but those are some if conditions ;-) And if it is a shared workstation
and you change it for the all-users profile, people are likely to be upset.

BTW, it is very easy from a C windows program to make a console window
pop up with stdin,stdout,stderr ready to go at the next code line.
It's a win32 C API called AllocConsole and it does nothing if a console window already exists.

I don't know what pythonw.exe does with std i/o that hasn't been intercepted,
but I would think it could be handy to have it force a console window, and maybe
have a pythonw.exe command line option to dump either or both stdout and stderr
silently. That way by default you'd see errors etc. unless you opt now to.
(I should check, maybe they've thought of this already. It's really easy to do)
... Nope, I don't see it in python -h (and pythonw -h doesn't show anything ;-)

>
>>What do you mean by "their command prompt"? The actual prompt of
>cmd.exe
>>or the command line interpretation? I agree the latter sucks, but I
>could
>>change the shell if I wanted to go to the trouble.
>Of course, but one cannot always change it  on boxes you have to deal
>with.  Probably in an effort to not compete with themselves, there are
>some basic  things a multi-hundred dollar operating system doesn't give
>you. Like, oh, a simple editor that has multiple levels of undue and
>redo.
Sigh ;-)

>
>>Actually, I don't really like os system info mixed in with application
>>info, which is what #!
>
>I think of it like the ''.join semantics. The object knows best how to
>handle join (even if it looks wierd to some people). In the #! case,
>the program knows best how to start itself.
>
This I don't understand ;-)

Regards,
Bengt Richter


From usenet at gungfu.de  Sun Apr 24 10:37:40 2005
From: usenet at gungfu.de (=?iso-8859-1?q?Steffen_Gl=FCckselig?=)
Date: 24 Apr 2005 07:37:40 -0700
Subject: Question on metaclasses
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
Message-ID: <1114353460.225361.238720@g14g2000cwa.googlegroups.com>

Are wrap and get_directives somehow built-in? I couldn't find
references to them.

I've noticed, too, that using __new__ I can manipulate the dictionary
resulting in the behavior I intented.

I'd rather like to know: Why does it work in __new__ but not in
__init__?

And, stimulated by your response: Why is using __new__ superior to
__init__?


best regards
Steffen



From lothar at ultimathule.nul  Mon Apr  4 15:36:12 2005
From: lothar at ultimathule.nul (lothar)
Date: Mon, 4 Apr 2005 19:36:12 -0000
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com>
	<mailman.1279.1112602272.1799.python-list@python.org>
Message-ID: <11535p0mdgqde1@corp.supernews.com>

with respect to the documentation, the module is broken.

the module does not necessarily deliver a "minimal length" match for a
non-greedy pattern.


"Fredrik Lundh" <fredrik at pythonware.com> wrote in message
news:mailman.1279.1112602272.1799.python-list at python.org...
> "lothar" wrote:
>
> > this is a bug and it needs to be fixed.
>
> it's not a bug, and it's not going to be "fixed".  search, findall,
finditer, sub,
> etc. all scan the target string from left to right, and process the first
location
> (or all locations) where the pattern matches.
>
> </F>
>
>
>





From rtw at freenet.co.uk  Fri Apr 15 19:12:10 2005
From: rtw at freenet.co.uk (Rob Williscroft)
Date: Fri, 15 Apr 2005 18:12:10 -0500
Subject: trouble using \ to escape %
References: <1113606334.524947.54630@l41g2000cwc.googlegroups.com>
Message-ID: <Xns963A211A95F2rtwfreenetREMOVEcouk@216.196.109.145>

Lucas Machado wrote in news:1113606334.524947.54630
@l41g2000cwc.googlegroups.com in comp.lang.python:

> str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%U" % (list[0], list[1],
> list[0], list[1])
> 

In a format string use '%%' for a single % char':

str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/%%U" % (list[0], list[1],list[0], 
list[1])


Rob.
-- 
http://www.victim-prime.dsl.pipex.com/


From nde at no.spam.org  Fri Apr  8 07:20:17 2005
From: nde at no.spam.org (Nick Efford)
Date: Fri, 8 Apr 2005 11:20:17 +0000 (UTC)
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org>
Message-ID: <d35pdh$aj9$1@iss-nntp.leeds.ac.uk>

vegetax <vegeta.z at gmail.com> wrote:

> And those thoughts comes to mind again, if python is such a great language
> why does the stdlib is so bloated with duplication,bad bad library
> design,clumsy to use modules,etc.

> I mean is this normal? i dont think so.I havent seen such a messy stdlib in
> any language.

Perl hardly covers itself with glory in this regard.

And what of Java? AWT & Swing, Date & Calendar, Streams, Readers
and java.nio...  There's a lot of complex layering going on there,
with many older features being buried and then deprecated (actually
or effectively).  The net result may be interesting for software
archaeologists, but hardly inspires the notion of a coherently
designed library.

> Is it because of legacy code and backwards compatibility or

The full benefits and limitations of particular design decisions take
a while to emerge, after which point people are depending on the
code and you are limited to refactoring the implementation without
changing the interface - unless you are prepared for the howls
of protest from those whose code breaks.  So to some extent the
problems you mention are unavoidable - but I think you overstate
your case.

> because not too much people in the python-dev cares about library design?

I doubt that.

> admit the python language design is really really great but the stdlib is
> totally forgotten.

This is a very extreme view.  The standard library isn't perfect,
but it is far from being the mess you imply.

My own personal bugbear is the issue of consistency.  Java's standard
library might be a huge and clumsy beast with more than its fair share
of overloading and obsolescence, but it at least has the virtue of more
consistently following conventions on how classes and methods are
named, for instance.


Nick


From skemplay at gmail.com  Fri Apr  1 03:03:02 2005
From: skemplay at gmail.com (Sean Kemplay)
Date: Fri, 1 Apr 2005 18:03:02 +1000
Subject: Ternary Operator in Python
In-Reply-To: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
Message-ID: <b96eed2505040100032d2e319f@mail.gmail.com>

You could use 

condition and consequent or alternative

I use it
Sean

On Apr 1, 2005 5:24 PM, praba kar <prabapython at yahoo.co.in> wrote:
> Dear All,
>     I am new to Python.  I want to know how to
> work with ternary operator in Python.  I cannot
> find any ternary operator in Python.  So Kindly
> clear my doubt regarding this
> 
> 
> __________________________________
> Yahoo! Messenger
> Show us what our next emoticon should look like. Join the fun.
> http://www.advision.webevents.yahoo.com/emoticontest
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From greg at cosc.canterbury.ac.nz  Mon Apr  4 21:12:23 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Tue, 05 Apr 2005 13:12:23 +1200
Subject: Super Newbie Question
In-Reply-To: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
References: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
Message-ID: <3be704F6gh9p1U1@individual.net>

joeyjwc at gmail.com wrote:

> In short, how might I go about deleting just the contents of a file?

File objects have a truncate() method which chops the file
back to zero length (or a length that you specify).

But why not just delete the file? You can always
create another one with the same name later if
you want.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From steve at holdenweb.com  Mon Apr  4 16:35:50 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 04 Apr 2005 16:35:50 -0400
Subject: Real ython Poetry [was: Re: boring the reader to death...]
In-Reply-To: <424e8d1d$1@nntp0.pdx.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<pan.2005.04.01.15.50.51.219430@jerf.org>	<iUe3e.21015$d5.156054@newsb.telia.net>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<Rdo3e.21051$d5.155911@newsb.telia.net>	<mailman.1221.1112416371.1799.python-list@python.org>	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net>
Message-ID: <4251A526.3010600@holdenweb.com>

Scott David Daniels wrote:
> Sunnan wrote:
> 
>> ...Because what is "boring"? The opposite of dense, tense, intense. 
>> Utterly predictable; it's like the combination of all my prejudices. 
>> Even before I knew, I thought "Bet Python separates statements from 
>> expressions".
> 
> 
> Python is for terse, pithy prose; Python is not for poetry.
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org

I though that too, until Michael Spencer sent me the following 
executable Python limerick, which I declared the PyCon limerick 
competition and read as a part of my closing address:

# Freely re-distributable under Poetic License*
# Voice only the alphanumeric tokens

from itertools import repeat
for feet in [3,3,2,2,3]:
     print " ".join("DA-DA-DUM"
     for dummy in [None]
for foot in repeat("metric", feet))

*thanks to Peter Hansen

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From vze4rx4y at verizon.net  Fri Apr  1 19:15:19 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 02 Apr 2005 00:15:19 GMT
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <kLg3e.203$7b.56@trndny02>
	<424dc33c.55623752@news.oz.net> <esk3e.1612$4b.185@trndny09>
	<424dda51.61532058@news.oz.net>
Message-ID: <rul3e.4647$db.487@trndny07>

> >Taken together, these six attributes/methods could cover many wished for
> >features for the 10% of the cases where a regular dictionary doesn't provide
the
> >best solution.

> You think as much as 10% ?

Rounded up from 9.6 ;-)

More important than the percentage is the clarity of the resulting code and the
avoidance of continous reinvention of workarounds.

Separating tool features into a basic and an advanced version is common solution
to managing option/customization complexity.


Raymond




From max2 at fisso.casa  Sat Apr  9 17:30:46 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 09 Apr 2005 21:30:46 GMT
Subject: very simple tkinter demo program
Message-ID: <aQX5e.1205416$35.44366592@news4.tin.it>

hello.

i wrote a very simple tkinter demo program that uses menus, buttons, 
labels, entries, frames and secondary toplevels.

it is a python version of a java program made by a colleague.

the user can create ("Scrivi") a record with his second name, first name 
and date of birth, save ("Salva") the record to a file or read in 
("Leggi") a previously created file. "Annulla" is to cancel. "Chiudi" is 
to close.

i also used try-except for checking for invalid files.

only one menu is real ("File"), the others are for future use.

i'd like to hear your suggestions and comments for improving it.

i recently learned tkiner from stephen ferg's website and reading the 
tk8.4 widget demo programs.

one thing i still cannot do is to make the primary window and the 
secondary aware of each other (so avoid that a second instance of a 
secondary window can be generated if an instance still exists, for example).

so, here it is folks:

---cut here---

from Tkinter import *

class MiaApp:
   def __init__(self, genitore):

     self.MioGenitore = genitore

     fonte = ("Helvetica", "12")

     self.campi = ["Cognome", "Nome" , "Data di nascita"]

     quadro_grande = Frame(genitore)
     quadro_grande.pack(expand = YES, fill = BOTH)

     quadro_menu = Frame(quadro_grande)
     quadro_menu.configure(
       bd = 1,
       relief = RAISED
       )
     quadro_menu.pack(side = TOP, fill = X)

     pm_file = Menubutton(quadro_menu)
     pm_file.configure(text = "File")
     pm_file.pack(side = LEFT)

     m_file = Menu(pm_file)
     pm_file.configure(menu = m_file)
     m_file.configure(tearoff = NO)
     m_file.add_command(
       label = "Scrivi",
       command = self.premuto_scrivi
       )
     m_file.add_command(
       label = "Leggi",
       command = self.premuto_leggi
       )
     m_file.add_separator()
     m_file.add_command(
       label = "Chiudi",
       command = genitore.destroy
       )

     pm_mod = Menubutton(quadro_menu)
     pm_mod.configure(text = "Modifica")
     pm_mod.pack(side = LEFT)

     pm_aiuto = Menubutton(quadro_menu)
     pm_aiuto.configure(text = "?")
     pm_aiuto.pack(side = RIGHT)

     msg = Label(quadro_grande)
     msg.configure(
       font = fonte,
       relief = RIDGE,
       wraplength = "10c",
       justify = LEFT,
       text = u"Questo \u00E8 un programma in Python \
che trae ispirazione da un analogo lavoro del collega \
G. Renda. Il programma originale era scritto \
in linguaggio Java, e sfruttava le librerie JFC \
(\u00ABJava Foundation Class\u00BB, dette anche \
\u00ABSwing\u00BB); questo invece usa le librerie Tk, \
mediante il modulo Tkinter."
       )
     msg.pack(
       side = TOP,
       padx = "2m",
       pady = "2m"
       )

     quadro_pulsanti = Frame(quadro_grande)
     quadro_pulsanti.pack(
       side = BOTTOM,
       fill = X,
       padx = "2m",
       pady = "2m"
       )

     scrivi = Button(quadro_pulsanti)
     scrivi.configure(
       text = "Scrivi",
       command = self.premuto_scrivi
       )
     scrivi.pack(side = LEFT, expand = YES)

     leggi = Button(quadro_pulsanti)
     leggi.configure(text = "Leggi", command = self.premuto_leggi)
     leggi.pack(side = LEFT, expand = YES)

     chiudi = Button(quadro_pulsanti)
     chiudi.configure(text = "Chiudi", command = genitore.destroy)
     chiudi.pack(side = LEFT, expand = YES)

   def premuto_scrivi(self):
     InserimentoRecord()

   def premuto_leggi(self):
     ConsultazioneRecord()

class InserimentoRecord(Toplevel):
   def __init__(self):

     Toplevel.__init__(self)

     self.titolo = "Inserimento"
     self.wm_title(self.titolo)

     quadro_grande = Frame(self)
     quadro_grande.pack(expand = YES, fill = BOTH)

     self.quadro_pulsanti = Frame(quadro_grande)
     self.quadro_pulsanti.pack(
       side = BOTTOM,
       fill = X,
       padx = "2m",
       pady = "2m"
       )

     quadri_ing = []
     self.n = len(miaApp.campi)
     self.var = []
     eti = []
     larg_eti = max(map(len, miaApp.campi))
     ing = []
     for i in range(self.n):
       quadri_ing.append(None)
       self.var.append(None)
       ing.append(None)
       eti.append(None)
       quadri_ing[i] = Frame(quadro_grande)
       quadri_ing[i].pack(side = TOP, expand = YES, fill = BOTH)
       self.var[i] = StringVar()
       eti[i] = Label(quadri_ing[i])
       eti[i].configure(
	text = miaApp.campi[i] + ": ",
	width = larg_eti,
	anchor = E
	)
       eti[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
       ing[i] = Entry(quadri_ing[i], textvariable = self.var[i])
       ing[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)

     self.salva = Button(self.quadro_pulsanti)
     self.salva.configure(
       text = "Salva",
       command = self.premuto_salva
       )
     self.salva.pack(side = LEFT, expand = YES)

     self.annulla = Button(self.quadro_pulsanti)
     self.annulla.configure(
       text = "Annulla",
       command = self.premuto_annulla
       )
     self.annulla.pack(side = LEFT, expand = YES)

   def premuto_salva(self):
     import tkFileDialog
     import pickle

     dati = []
     for i in range(self.n):
       dati.append(None)
       dati[i] = self.var[i].get()

     nomefile = tkFileDialog.asksaveasfilename(
       defaultextension = ".ana",
       filetypes = [
	("Record anagrafici", "*.ana"),
	("Tutti i file", "*")
	]
       )

     if nomefile:
       f = open(nomefile, "w")
       pickle.dump(dati, f)
       f.close()

     self.destroy()

   def premuto_annulla(self):
     self.destroy()

class ConsultazioneRecord(Toplevel):
   def __init__(self):

     import tkFileDialog

     nomefile = tkFileDialog.askopenfilename(
       defaultextension = ".ana",
       filetypes = [
	("Record anagrafici", "*.ana"),
	("Tutti i file", "*")
	]
       )

     if nomefile:

       try:  ### Il metodo 'pickle.load' potrebbe generare una
	    ### eccezione se l'utente cerca di aprire un file
	    ### non del formato giusto

	Toplevel.__init__(self)

	self.titolo = "Consultazione"
	self.wm_title(self.titolo)

	quadro_grande = Frame(self)
	quadro_grande.pack(expand = YES, fill = BOTH)

	eti_rec = Label(quadro_grande)
	eti_rec.configure(
	  text = "Record: " + nomefile,
	  relief = RIDGE
	  )
	eti_rec.pack(
	  side = TOP,
	  fill = X,
	  padx = "5m",
	  pady = "5m"
	  )

	self.quadro_pulsanti = Frame(quadro_grande)
	self.quadro_pulsanti.pack(
	  side = BOTTOM,
	  fill = X,
	  padx = "2m",
	  pady = "2m"
	  )

	import pickle

	quadri_eti = []
	eti_campi = []
	eti_val = []
	larg_eti_campi = max(map(len, miaApp.campi))
	f = open(nomefile, "r")

	valori = pickle.load(f)  ### Potrebbe generare una
				 ### eccezione 'KeyError'

	larg_eti_val = max(map(len, valori))
	n = len(miaApp.campi)
	for i in range(n):
	  quadri_eti.append(None)
	  eti_campi.append(None)
	  eti_val.append(None)
	  quadri_eti[i] = Frame(quadro_grande)
	  quadri_eti[i].pack(side = TOP, expand = YES, fill = BOTH)
	  eti_campi[i] = Label(
	    quadri_eti[i],
	    text = miaApp.campi[i] + ": ",
	    width = larg_eti_campi,
	    anchor = E
	    )
	  eti_campi[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
	  eti_val[i] = Label(
	    quadri_eti[i],
	    text = valori[i],
	    anchor = W,
	    width = larg_eti_val,
	    relief = SUNKEN
	    )
	  eti_val[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
	self.chiudi = Button(self.quadro_pulsanti)
	self.chiudi.configure(
	  text = "Chiudi",
	  command = self.premuto_chiudi
	  )
	self.chiudi.pack(side = LEFT, expand = YES)

       except KeyError:  ### Eventualmente generato da
			### 'pickle.load()'

	import tkMessageBox

	tkMessageBox.showwarning(
	  "Bad input",
	  "Illegal values, please try again"
	  )
         self.destroy()

       f.close()

   def premuto_chiudi(self):
     self.destroy()

radice = Tk()
radice.wm_title("Versione Python di un programma Java di G. Renda")
radice.wm_iconname("giuseppe")
radice.minsize(400, 300)
miaApp = MiaApp(radice)
radice.mainloop()


From shalabh at cafepy.com  Sat Apr  2 13:29:19 2005
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Sat, 02 Apr 2005 10:29:19 -0800
Subject: Performance issue
In-Reply-To: <edce2a2e05040207452bb2a1ad@mail.gmail.com>
References: <edce2a2e05040207452bb2a1ad@mail.gmail.com>
Message-ID: <424EE47F.4040605@cafepy.com>

Tom Carrick wrote:
> Hi,
> 
> In my attempted learning of python, I've decided to recode an old
> anagram solving program I made in C++. The C++ version runs in less
> than a second, while the python takes 30 seconds. I'm not willing to
> think it's just python being slow, so I was hoping someone could find
> a faster way of doing this. Also, I was wondering if there was a more
> builtin, or just nicer way of converting a string to a list (or using
> the sort function on a list) than making a function for it.

<code snipped>

Others have already given a good commentary and alternate suggestions. 
Here is some more (and some disagreements):

* Know your data structures (and how long different operations take). 
Like don't do del L[0] unless required. This generally comes from 
experience (and asking on this list).

* list(any_sequence_here) will build a list from the sequence. There are 
usually easy ways of converting built-in types - the Python docs will 
help you here.

* Try to write code as close to an english description of the problem as 
possible. For example 'for word in words:' rather than using counters 
and []. This is usually faster, clearer and IMO an important ingredient 
of being 'Pythonic'.

Anyway here's my rendition of your program:

###
anagram = raw_input("Find anagrams of word: ")
lanagram = list(anagram)
lanagram.sort()
sorted_anagram = ''.join(lanagram).lower()

f = open('/usr/share/dict/words', 'r')

found = []

for word in f:
     word = word.strip('\n')
     if len(word)==len(sorted_anagram):
	sorted_word = list(word)
	sorted_word.sort()
	sorted_word = ''.join(sorted_word)
         if sorted_word == sorted_anagram:
	    found.append(word)

print "Anagrams of %s:" % anagram

for word in found:
     print word
###

Hopefully it is fast enough.

Shalabh



From pinard at iro.umontreal.ca  Fri Apr  1 12:26:10 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Fri, 1 Apr 2005 12:26:10 -0500
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <iUe3e.21015$d5.156054@newsb.telia.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<l-qdnS9Is-M_ZdHfRVn-vA@speakeasy.net>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
Message-ID: <20050401172610.GA18906@phenix.progiciels-bpi.ca>

[Sunnan]

> [...] for Pythons ideal of having one canonical, explicit way to
> program.

No doubt it once was true, but I guess this ideal has been abandoned a
few years ago.

My honest feeling is that it would be a mis-representation of Python,
assertng today that this is still one of the Python's ideals.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From Zhuanshi.He at gmail.com  Sun Apr 17 11:43:16 2005
From: Zhuanshi.He at gmail.com (Zhuanshi He)
Date: 17 Apr 2005 08:43:16 -0700
Subject: How to compile ScientificPython-2.4.9 under XP cygwin environment?
Message-ID: <a13c8f1c.0504170743.2b78c9ee@posting.google.com>

I try to compile ScientificPython-2.4.9
(http://starship.python.net/~hinsen/ScientificPython/) under Windows XP
cygwin environment using python 2.3.3 ,and gcc (GCC) 3.3.3 (cygwin
special).

The information shows as follows:

----------------------------------------------------------
Using netCDF installation in  /usr/local
running build
running build_py
running build_ext
building 'Scientific_netcdf' extension
gcc -shared -Wl,--enable-auto-image-base
build/temp.cygwin-1.5.10-i686-2.3/Src/Scientific_netcdf.o
-L/usr/local/lib -L/usr/lib/python2.3/config -lnetcdf -lpython2.3 -o
build/lib.cygwin-1.5.10-i686-2.3/Scientific/cygwin/Scientific_netcdf.dll

build/temp.cygwin-1.5.10-i686-2.3/Src/Scientific_netcdf.o(.text+0x6eb):
In function `initScientific_netcdf':
/cygdrive/c/pygmt/ScientificPython-2.4.9/Src/Scientific_netcdf.c:2050:
undefined reference to `_ncopts'
build/temp.cygwin-1.5.10-i686-2.3/Src/Scientific_netcdf.o(.text+0x3067):
In function `netcdf_seterror':
/cygdrive/c/pygmt/ScientificPython-2.4.9/Src/Scientific_netcdf.c:46:
undefined reference to `_ncerr'
collect2: ld returned 1 exit status
error: command 'gcc' failed with exit status 1
------------------------------------------------

Does anyone meet same problem?


From Michael.Coll-Barth at VerizonWireless.com  Fri Apr 22 16:08:12 2005
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Fri, 22 Apr 2005 16:08:12 -0400
Subject: rudeness    was:  Python licence again
Message-ID: <20050422200816.4EB661E4006@bag.python.org>

Laszlo,

>>> Is it something like 'center' or 'color' for Americans and 'centre' or
'colour' for British people?

Yes, exactly.  

>>> (Sorry to be offtopic)

No need to apologize.  I started to read the postings on this list and was
dismayed at the depth of rudeness on here.  I thought that pythonistas might
be a little more patient/tolerant.  I guess I was wrong.  I understood
exactly what you wanted to say, I just didn't have an answer.  I did find it
amusing that the person who incorrectly corrected you, was in fact,
incorrect.  

I wonder, how many others out there find that the documentation and
references materials seem to be written for someone that already knows the
answer, but are indecipherable, at times, for those that don't know the
answer.

thanks,
Michael
___________________________________________________________________
The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From steve at holdenweb.com  Wed Apr  6 15:05:26 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 06 Apr 2005 15:05:26 -0400
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <9rv7515o3o7fomvs5mlhnqrprb72n9arck@4ax.com>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>	<mailman.1412.1112744591.1799.python-list@python.org>	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>	<425394bd.436936831@news.oz.net>
	<9rv7515o3o7fomvs5mlhnqrprb72n9arck@4ax.com>
Message-ID: <d31bp7$hj4$1@sea.gmane.org>

Ron_Adam wrote:
> On Wed, 06 Apr 2005 08:10:22 GMT, bokr at oz.net (Bengt Richter) wrote:
> 
> 
>>I don't understand your seeming fixation with wrappers and wrapping.
> 
> 
> Fixated implies, I'm stuck on a single thing, but I'm not. I am
> learning as I go, and exploring some possibilities as well.  :-)
> 
> 
>>That's not
>>the only use for decorators. See Raymond Hettinger's optimizing decorators
>>in the cookbook for instance. 
> 
> 
> Thanks, I'll look for it.  Is it in the new edition?  I haven't picked
> it up yet.
> 
> 
>>Decorators are something like metaclasses for functions,
>>with much more general possibilities than wrapping, IMO.
> 
> 
> I'm not sure I see the metaclass relation.  What more general things
> can be done with Decorators, that can't be done with a wrapper?
> 
> Wrapping, and the @decorator expressions, interest me because I see a
> lot of potential in it's use, and so I'm trying to learn them, and at
> the same time, there are things about the @ expression that seems (to
> me), that it's not the most practical way to do what it was intended
> for.  
> 
> On the plus side, it's kind of cute with the little curly thing
> propped up on top of the function. It's a neat trick that it does what
> it does with a minimal amount of changes to the language by taking
> advantage of pythons existing function perimeter and object passing
> properties. It saves a bit of typing because we don't have to retype
> the function name a few times.  (Several people have referred to it as
> 'sugar', and now I am starting to agree with that opinion.)
> 
> On the minus side, it's not intuitive to use.  It is attached to the
> function definitions so they are limited, they can't be easily
> unwrapped and rewrapped without redefining the function also.  The
> recursive nature of stacked @ statements is not visible.
> 
> So my opinion of @ as a whole is currently: -1
> 
> 
> 
>>I think you'll have to show some convincing use cases showing a clear
>>advantage over current decoration coding if you want converts ;-)
> 
> 
> What about the following?  :-)
> 
> # Using this simple wrapper class:
> class wrapper(object):
>     def __call__(self,x):
>        # preprocess x
>        x*=2 			# Make a change so we can see it
>        result = self.function(x)
>        # postprocuess result
>        return result
> 
> # A function to apply the wrapper:
> def wrap(function,wrapper):
>     w = wrapper()
>     w.function = function
>     return w
> 
> # The function
> def fn(x):
>     return x
> 
> print fn(5)		# Before
> 
> # Wrapit.
> fn = wrap(fn,wrapper)
> 
> print fn(5)		# After
> 
> # Unwrap it.
> fn = fn.function
> 
> print fn(5)     # And back again
> 
> #prints
> #5
> #10
> #5
> 
> It has several advantages over @ expression.  It doesn't need the
> triple nested defines to get the function name and argument list, the
> wrapper is simpler, It can be placed on a function and then removed,
> when and where it's needed, instead of at the point where the function
> is defined.
> 
> The following behaves more closely to the existing @ expression in
> that it has the same nesting behavior for stacked wrappers.  
> 
> I'm looking into a way to do sequential non-nested stacked wrappers at
> this point, where the output of one goes to the input of the next.
> That can't be done currently with the @ decorator expression.
> 
> This stacks a list of 10 wrappers on 10 different functions and
> reverses the order of the stack every other function. In this case
> they are all the same, but they could all be differnt. 
> 
> Cheers,
> Ron
> 
> #---start---
> class wrapper(object):
>     def __call__(self,*x):
>         # preprocess
>         x = [x[0]+1,] 
>         print 'preprocess', x[0], self.args
>         # call function
>         result = self.function(*x)
>         # postprocess
>         result +=1
>         print 'postprocess', result, self.args
>         return result
> 
> def wrap(f,w,shape='forward'):
>     if shape=='reverse':
>         w.reverse()
>     for ww in w:
>         nw = wrapper()
>         try:
>             nw.args = ww[1]
>         except TypeError:
>             wf = ww[0]
>         nw.function = f
>         f = nw
>     return f
> 
> # Make a list of ten wrappers with an id number as an additional
> # wrapper perimeter.
> w = []
> for n in xrange(10):
>     w.append((wrapper,n))
>     
> # Wrap 10 functions, 10 times, in reversing order.
> def func0(x): return x
> def func1(x): return x
> def func2(x): return x
> def func3(x): return x
> def func4(x): return x
> def func5(x): return x
> def func6(x): return x
> def func7(x): return x
> def func8(x): return x
> def func9(x): return x
> 
> func0 = wrap(func0,w)
> func1 = wrap(func1,w,'reverse')
> func2 = wrap(func2,w)
> func3 = wrap(func3,w,'reverse')
> func4 = wrap(func4,w)
> func5 = wrap(func5,w,'reverse')
> func6 = wrap(func6,w)
> func7 = wrap(func7,w,'reverse')
> func8 = wrap(func8,w)
> func9 = wrap(func9,w,'reverse')
> 
> print func0(0)
> print func1(0)
> print func2(0)
> print func3(0)
> print func4(0)
> print func5(0)
> print func6(0)
> print func7(0)
> print func8(0)
> print func9(0)
> 
> #--end--
> 
> 
> 
I find I am still left asking the question "why would anyone want to do 
that?".

The difference between a use case and an example is that a use case 
should demonstrate the solution of a problem that someone might 
reasonably be wanting to solve, rather than a way of creating an 
abstract program structure for which there is no easily observable 
requirement.

I can understand it if you are merely pursuing this topic because of 
your fascination with the capabilities of Python, but I don't have the 
feeling that there are legion Python programmers out there waiting 
impatiently to be able to build wrapped functions. People have been 
doing that as necessary for years, you're just coming to it for the 
first time.

By the way, we pass *parameters* to functions, *perimeters* surround things.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From claird at lairds.us  Tue Apr 19 18:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Tue, 19 Apr 2005 22:08:03 GMT
Subject: Variables variable
References: <mailman.2096.1113916800.1799.python-list@python.org>
	<3ckeukF6n53cpU1@individual.net>
Message-ID: <3u8gj2-o28.ln1@lairds.us>

In article <3ckeukF6n53cpU1 at individual.net>,
Reinhold Birkenfeld  <reinhold-birkenfeld-nospam at wolke7.net> wrote:
>Adriano Monteiro wrote:
>> Hi folks,
>> 
>> Someone know how to make variables variable like in PHP?
>> It's something like this:
>> 
>> $a = 'hi'
>> $$a = 'testing'
>> echo $hi
>> 'testing'
>
>You are most certainly wanting to use dictionaries.
>
>Or, if you work with attributes of an object, use getattr.
			.
			.
			.
I have a few comments on this:  Python can do essentially what
PHP does.  One means is the getattr() Reinhold cites.

HOWEVER, it's generally always a mistake to do so.  Dictionaries
are simply better.  AND THAT'S TRUE IN PHP, too.  I'm frankly 
disappointed in PHP leaders that they continue to promote this
"variable-variable" idiom.  As much as anything is certain in
the realm of stylistic expression, dictionaries are a superior
mechanism.


From ccurvey at gmail.com  Thu Apr 28 10:20:42 2005
From: ccurvey at gmail.com (ccurvey at gmail.com)
Date: 28 Apr 2005 07:20:42 -0700
Subject: anybody have a CGIXMLRPCRequestHandler example?
Message-ID: <1114698042.831888.224060@g14g2000cwa.googlegroups.com>

I see the ones in the docs, but I really (apparently) need some usage
notes.  Something as simple as an "echo" would probably do the trick.



From jstroud at mbi.ucla.edu  Wed Apr 27 13:52:14 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 27 Apr 2005 10:52:14 -0700
Subject: tkinter text width
In-Reply-To: <opspvwqxd4rqur0o@eb.pragmadev>
References: <mailman.2550.1114560111.1799.python-list@python.org>
	<opspvwqxd4rqur0o@eb.pragmadev>
Message-ID: <200504271052.14236.jstroud@mbi.ucla.edu>

On Wednesday 27 April 2005 02:31 am, so sayeth Eric Brunel:
> The "trick" is to create the Text as small as possible (width=1, height=1),
> make it fill its whole container (pack(fill=BOTH, expand=1)), then set the
> dimensions for the container window (geometry('500x200')). You'll get a
> Text that will shrink and expand as much as you like.
>
> Is it what you were after?

This is more or less what I would like, but I would also like to probe the 
Text to see how many characters it thinks it can display within the container 
window. I am formatting text dynamically and so I rely on the width. I am not 
after the built in "wrap" option, it does not do what I want. But, say if 
wrap were turned on, it would be good to know how many characters the Text 
would wrap at.

James

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

http://www.jamesstroud.com/


From jstroud at mbi.ucla.edu  Wed Apr 27 15:52:21 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 27 Apr 2005 12:52:21 -0700
Subject: tkinter text width
In-Reply-To: <pan.2005.04.27.19.10.51.37432@jerf.org>
References: <mailman.2550.1114560111.1799.python-list@python.org>
	<mailman.2593.1114624338.1799.python-list@python.org>
	<pan.2005.04.27.19.10.51.37432@jerf.org>
Message-ID: <200504271252.21592.jstroud@mbi.ucla.edu>

Thank you to everybody helping me. I think I am almost there...

On Wednesday 27 April 2005 12:10 pm, so sayeth Jeremy Bowers:
> 2. Use a fixed-width font and manually wrap. (It's pretty easy then, you
> can ask the font for how wide any char is and do the math from there.)

How might I query the size of a fixed-width font in pixles? It appears that 
the width of the font in points does not correlate with its width in pixels 
based on some simple expriments I have done. Using cget("font") on the Text 
gives back a string with the point size.

> [snip some things to worry about]
> Basically, I'm pretty sure you can't do this.

My setup is not very complicated, so I don't think I have to worry about 
kerning, unicode, etc.. I am using a fixed width font (courier) only, and 
only one size and am also quite comfortable with giving away several pixels 
at the end of a line for "rounding errors" and will filter for a limited 
alphabet consisting only of the numbers, the captial letters, and the space.

I think I can do this given these limitations.

James

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

http://www.jamesstroud.com/


From ajikoe at gmail.com  Sat Apr 16 05:01:54 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 16 Apr 2005 02:01:54 -0700
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 140)
In-Reply-To: <1113613608.511723.298610@o13g2000cwo.googlegroups.com>
References: <1113613608.511723.298610@o13g2000cwo.googlegroups.com>
Message-ID: <1113642114.685230.165130@o13g2000cwo.googlegroups.com>

I don't know why you post this article and contradict pope and
Christian.
Is this the right forum to talk something like this ?????

I guess this is only python language forum not Religion forum !!!!


---
pujo



From kasimov at i.com.ua  Wed Apr 27 03:35:34 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Wed, 27 Apr 2005 10:35:34 +0300
Subject: python equivalent of php implode
In-Reply-To: <d4nerk$mav$01$1@news.t-online.com>
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<mailman.2520.1114531188.1799.python-list@python.org>
	<8664y8lyb2.fsf@guru.mired.org>
	<d4ndag$2st8$1@news.tsystems.kiev.ua>
	<d4nerk$mav$01$1@news.t-online.com>
Message-ID: <d4nfhr$2t3v$1@news.tsystems.kiev.ua>


done. thanks

> 
> 
> Try another paramstyle (see http://python.org/peps/pep-0249.html), e. g.
> 
> .... ",".join(["%s"] * len(keys)) ...
> 
> instead of
> 
> .... ",".join(["?"] * len(keys)) ...
> 
> Peter
> 
> 
> 


-- 
Best regards,
Maksim Kasimov
mailto: kasimov at i.com.ua


From sxanth at cs.teiath.gr  Fri Apr  1 09:33:52 2005
From: sxanth at cs.teiath.gr (stelios xanthakis)
Date: Fri, 01 Apr 2005 17:33:52 +0300
Subject: Looking for Benchmarklets to improve pyvm
Message-ID: <424D5BD0.10601@cs.teiath.gr>

Hi.

pyvm is a program that can run python 2.4 bytecode and most
of the times produce the expected output.  See

	http://students.ceid.upatras.gr/~sxanth/

I'm collecting small testlets to benchmark it, discover bottlenecks
and improve it.  They should be small and not use any crazy modules.
Only [sys, os, itertools, thread, threading, math, random] for now.

Basically, stuff that has appeared in c.l.py will be great
(like xah lee's "partition list be equivalence", etc)

Send!

Stelios




From aisaac0 at verizon.net  Sat Apr 30 11:32:52 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Sat, 30 Apr 2005 15:32:52 GMT
Subject: mbx repair script: Python vs perl
Message-ID: <EyNce.1037$nN.378@trnddc05>

I'm looking for the Python equivalent of the perl script and module
described at
http://comments.gmane.org/gmane.mail.imap.uw.c-client/707

Any hope?

Thanks,
Alan Isaac




From jarrod.roberson at gmail.com  Wed Apr 20 12:54:54 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 20 Apr 2005 09:54:54 -0700
Subject: Faster os.walk()
In-Reply-To: <dqCdneACDr5-5vvfRVn-tA@powergate.ca>
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
	<mailman.2181.1114012135.1799.python-list@python.org>
	<dqCdneACDr5-5vvfRVn-tA@powergate.ca>
Message-ID: <1114016094.531694.117130@z14g2000cwz.googlegroups.com>

du is faster than my code that does the same thing in python, it is
highly optomized at the os level.

that said, I profiled spawning an external process to call du and over
the large number of times I need to do this it is actually slower to
execute du externally than my os.walk() implementation.

du does not return the value I need anyway, I need files only not raw
blocks consumed which is what du returns. also I need to filter out
some files and dirs.

after extensive profiling I found out that the way that os.walk() is
implemented it calls os.stat() on the dirs and files multiple times and
that is where all the time is going.

I guess I need something like os.statcache() but that is deprecated,
and probably wouldn't fix my problem. I only walk the dir once and then
cache all bytes, it is the multiple calls to os.stat() that is kicked
off by the os.walk() command internally on all the isdir() and
getsize() and what not.

just wanted to check and see if anyone had already solved this problem.



From anhtt at hotmail.com  Tue Apr 19 22:45:05 2005
From: anhtt at hotmail.com (Tran Tuan Anh)
Date: 19 Apr 2005 19:45:05 -0700
Subject: Python Debugger with source code tracking ability
Message-ID: <ed89f8f2.0504191845.aaeebf5@posting.google.com>

Hi all,

I am new to Python and desperated to look for a good Python debugger.
I mean a debugger with source coding tracking. For C/C++, emacs and
gud offers execellent development env. The source code tracking is
extremely useful for recursive functions.

I have spent time Googling but not found anything near.

Thanks!
Tuan-Anh


From radam2 at tampabay.rr.com  Sat Apr  2 15:36:50 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 20:36:50 GMT
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
	<prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>
Message-ID: <ac0u41t9atuo65g7m0g3muelb6b4l32ipe@4ax.com>

On Sat, 02 Apr 2005 18:39:41 GMT, Ron_Adam <radam2 at tampabay.rr.com>
wrote:

>>def foo():
>>    a = 10
>>    def bar():
>>       return a*a
>>    return bar
>>
>>print foo()()  <---------------  *Here*
>>
>>
>>No decorator-specific magic here - just references kept to outer frames
>>which form the scope for the inner function.

Thanks Kay,  I wasn't aware of pythons ability to pass arguments to
nested functions in this way. I missed it the first time.

Cheers,
Ron




From martin at v.loewis.de  Mon Apr  4 19:53:25 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 05 Apr 2005 01:53:25 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
In-Reply-To: <mailman.1299.1112626394.1799.python-list@python.org>
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com><mailman.1280.1112603141.1799.python-list@python.org>	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>
	<mailman.1299.1112626394.1799.python-list@python.org>
Message-ID: <4251d375$0$23625$9b622d9e@news.freenet.de>

Fredrik Lundh wrote:

> I'm not aware of any other tool that solves that specific problem.

notepad does a fine job at creating batch files, IMO.

Of course, it is not all that clear what the OP actually wanted.
For all we know, he wanted to "alternate quickly (with batch
file or similary) between python23 and python24". Taken in the
literal sense, selecting different versions of python.exe in
the start menu might be the fastest way of "alternating".

Regards,
Martin


From tiissa at nonfree.fr  Thu Apr 28 15:18:03 2005
From: tiissa at nonfree.fr (tiissa)
Date: Thu, 28 Apr 2005 21:18:03 +0200
Subject: Getting the sender widget's name in function (Tkinter)
In-Reply-To: <3rn7k2-ka5.ln1@lairds.us>
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
	<opspvv1vyxrqur0o@eb.pragmadev> <jaa7k2-ccg.ln1@lairds.us>
	<42712098$0$26202$626a14ce@news.free.fr> <3rn7k2-ka5.ln1@lairds.us>
Message-ID: <427136ea$0$31212$636a15ce@news.free.fr>

Cameron Laird wrote:
> In article <42712098$0$26202$626a14ce at news.free.fr>,
> tiissa  <tiissa at free.fr> wrote:
> 
>>So far, the OP is proposed the choice to either use the event/bind 
>>mecanism or use different callbacks for his different buttons (either 
>>with the method I proposed or not).
> 
> Is there general understanding that "use different
> callbacks ..." can be implemented as "parametrize the same callback
> with a widget-specific value"?

Tough questions thou ask! Again I can't answer about general 
understanding. ;)

However, having myself proposed such a solution in this very thread (and 
hinted about it in the above sentence), I do hope most people (at least 
those interested in this issue) will be aware of this kind of trick 
(without any restriction on the actual implementation). :)


From wschneider at ra.rockwell.com  Mon Apr 11 09:01:39 2005
From: wschneider at ra.rockwell.com (wschneider at ra.rockwell.com)
Date: 11 Apr 2005 06:01:39 -0700
Subject: How to pass a runtime license key to CreateControl()
Message-ID: <1113223276.462819.274660@l41g2000cwc.googlegroups.com>

Hi

I have a problem with passing a runtime license key for an ActiveX
control to the method CreateControl() of the class
pywin.mfc.activex.Control.

Can anybody give me a hint in which form the license key string must be
passed to this method?

I got the license key for the ActiveX control using the "License Key
Requester" from Microsoft and I used the string given as comment above
the WCHAR array (since I don't know how to convert the WCHAR array for
Python).

But when creating the control with this string, the control is created
in "evaluation mode" and not, as expected, as a licensed control.

I looked up the code for the CreateControl() method and found out, that
it passes the license key string directly to the CreateControl() of the
PyCWnd class (the Python wrapper for the CWnd class of MFC). Than I
looked at the Python extension, where the PyCWnd::CreateControl() is
implemented, and found, that the macro T2OLE is used to convert the
given Python string for the license key to an OLE string, before
passing it to the original MFC method.

ok = pWnd->CreateControl(clsid, szWndName, style, rect, pWndParent, id,
NULL, bStorage, T2OLE(szLicKey));

I'm not sure, but when I understand this right, the MFC method
CreateControl() wants a BSTR here and I read somewhere that T2OLE does
not return a BSTR. Can this be the problem here?

Has anybody ever used the license key string parameter of the
CreateControl() method in Python and can tell my how to pass the
license key string correctly?

Thanks in advance.

Wolfgang Schneider



From finite.automaton at gmail.com  Tue Apr 19 17:54:35 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 19 Apr 2005 14:54:35 -0700
Subject: newbie question
References: <465db603.0504191314.5d074cf8@posting.google.com>
Message-ID: <1113947675.400070.319430@o13g2000cwo.googlegroups.com>

What is usually meant when Python is mentioned in the context of game
scripting is that it's relatively easy for a game's developers to embed
a Python interpreter into the game.  Python would then be used to
control higher-level gameplay elements like artificial intelligence
while the game's native language (probably C) handles the heavy lifting
(e.g. rendering, collision detection, etc).

This does /not/ mean that you will be able to use Python to modify your
favorite game, unless it happens to already have an interpreter
built-in.  Maybe some resident gamers here can list some games that use
Python for user-accessible scripting; I don't know of any.



From Scott.Daniels at Acm.Org  Fri Apr  8 13:18:05 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 10:18:05 -0700
Subject: curious problem with large numbers
In-Reply-To: <4256b80b.34130777@news.oz.net>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>
	<mailman.1517.1112938969.1799.python-list@python.org>
	<4256a676@nntp0.pdx.net> <4256b80b.34130777@news.oz.net>
Message-ID: <4256b774$1@nntp0.pdx.net>

Bengt Richter wrote:
>>Aha! Same version (2.3.4):
>>
>>Idle:
>>    >>> 1e10000
>>    1.0
>>    >>> import struct; struct.pack('d', 1e10000)
>>    '\x00\x00\x00\x00\x00\x00\xf0?'
>>(which is actually 1.0)
>>
>>python via command line (readline support):
>>    >>> 1e10000
>>    1.#INF
>>    >>> import struct; struct.pack('d', 1e10000)
>>    '\x00\x00\x00\x00\x00\x00\xf0\x7f'
>>
>>Note the difference in the final byte.  Same results (command
>>line vs. Idle) for 2.4.1.
>>

> Good aha, but ISTM one of them is more missing than different ;-)
> (I.e., returned packed string is length 7 vs 8)
In the first one, the final byte is '?' (I made the same mistake
myself when I first read it).

Also note:

     float('1e10000') is 1.#INF both in Idle and from the command line.

I suspect an Idle bug.


--Scott David Daniels
Scott.Daniels at Acm.Org


From fritoj at netscape.net  Fri Apr  1 12:42:27 2005
From: fritoj at netscape.net (coffeebug)
Date: 1 Apr 2005 09:42:27 -0800
Subject: Looking for Benchmarklets to improve pyvm
In-Reply-To: <mailman.1187.1112369071.1799.python-list@python.org>
References: <mailman.1187.1112369071.1799.python-list@python.org>
Message-ID: <1112377347.642818.56520@l41g2000cwc.googlegroups.com>

Hi Stelios,
Newbie here ("new" to the language and scripting in general).
I'm trying to figure out what you mean by bytecode.  Do you mean
a virtual python environment that can be hosted by any anonymous
operating system?   For example, you want to run Python programs on
BEOS so you crank up its version of PYVM and load a Python source code
and run it?

Or do you mean you want Python that's been compiled down to something
like p-code on my machine, then you receive the p-code that you can
expect to run?

Is pyvm your own work?

Has anyone computed the digits of pi (3.14159265) in Python?
That might be a good application for string processing.
Jim in Indiana USA



From __peter__ at web.de  Wed Apr  6 12:34:13 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 06 Apr 2005 18:34:13 +0200
Subject: ignoring keywords on func. call
References: <1112787673.095411.266170@o13g2000cwo.googlegroups.com>
	<mailman.1424.1112788617.1799.python-list@python.org>
	<1112791176.258876.200160@o13g2000cwo.googlegroups.com>
Message-ID: <d31321$efv$00$1@news.t-online.com>

Brano Zarnovican wrote:

> But it still doesn't guarantee that __getitem__ accepts keywords.
> (What if somebody will extend the Tree class and overlook the
> definition of __getitem__ and define a "classic" one)

I deem it more likely that that same somebody will not overlook it and dump
your Tree class altogether for not adhering to a sensible convention. Why
don't you just introduce a getitem_ex(self, key, all the options you like)
method and define __getitem__() in terms of that method? E. g.

def getitem_ex(self, key, some_option=None):
    # ...

def __getitem__(self, key):
    return self.getitem_ex(key, some_option=True)

Your docs could then recommend to override getitem_ex() instead of
__getitem__() and you and somebody would live happily ever after (*).

Peter

(*) or at least without calling each other names right from the start.


From kent37 at tds.net  Fri Apr 22 11:38:54 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 11:38:54 -0400
Subject: Python CGI Select Multiple Returning all items in box
In-Reply-To: <1114183402.091406.122140@g14g2000cwa.googlegroups.com>
References: <1114115387.081363.109450@o13g2000cwo.googlegroups.com>
	<o00h6197bkl1tfferhruu0i8du6fkov4o9@4ax.com>
	<1114183402.091406.122140@g14g2000cwa.googlegroups.com>
Message-ID: <42691641$1_3@newspeer2.tds.net>

larsmtl at yahoo.com wrote:
> Sorry, I should have explained better.  I'm using the "listbox" as a
> repository.  With some Javascript, the user dumps items into it and
> then hits the submit.  It's similar to what you see here:
> http://www.mredkj.com/tutorials/tutorial_mixed2b.html
> 

IIRC I have done this in the past with an onSubmit handler that went through and selected all the 
items in the desired list so they would be included in the submit. It was long ago and far away 
though...

Kent


From harlinseritt at yahoo.com  Sun Apr 24 23:25:45 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Apr 2005 20:25:45 -0700
Subject: Multiple tuples for one for statement
In-Reply-To: <mailman.2426.1114399231.1799.python-list@python.org>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
	<mailman.2426.1114399231.1799.python-list@python.org>
Message-ID: <1114399545.634698.217320@l41g2000cwc.googlegroups.com>

Thank you Mr. Stroud.



From kasimov at i.com.ua  Wed Apr 20 07:48:32 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 14:48:32 +0300
Subject: goto statement
In-Reply-To: <mailman.2162.1113995666.1799.python-list@python.org>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
Message-ID: <42664190.6010507@i.com.ua>

Simon Brunning wrote:
> On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
> 
>>it would be quite useful for debuging porposes
> 
> 
> How does goto help you to remove bugs?
> 
> I can certainly see how it helps you put them in in the first place...
> 

if you need to comment a couple of code (and then uncomment ), what are you doing then?


-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From ramen at lackingtalent.com  Tue Apr 26 03:28:14 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Tue, 26 Apr 2005 07:28:14 -0000
Subject: (PHP or Python) Developing something like www.tribe.net
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<F7KdnSD_t-AnU_7fRVn-qg@comcast.com>
	<1113886371.590749.253780@g14g2000cwa.googlegroups.com>
Message-ID: <slrnd6rrcf.n51.ramen@lackingtalent.com>

In article <1113886371.590749.253780 at g14g2000cwa.googlegroups.com>, Mir Nazim wrote:
> I agree Zope2/Plone are really mature. But I think you missed my point.
> It is not neccessary that I may be using all the functionality of Plone
> etc. More over zope3 seems to have got a few great features like better
> support for building filesystem based products, easier learning curve
> etc.

I played around with Plone a couple of years ago, and it was rather slow. It
seemed to have a very solid design and a lot of intelligence put into it,
but I couldn't use it in any productions because I just couldn't squeeze
enough juice out of it, and also, for some reason I needed to restart the
entire Zope process when I made even small changes to templates/skins.

Can anyone who's worked with Plone recently comment as to whether these
issues have been improved since then? I notice that Plone has been popping
up quite a bit lately, and they don't seem unreasonably slow to me. (CPUs
have of course exploded in speed in the past few years.)

-- 
 .:[ dave benjamin: ramen/[sp00] -:- spoomusic.com -:- ramenfest.com ]:.
        "talking about music is like dancing about architecture."


From aisaac0 at verizon.net  Sat Apr 30 00:11:31 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Sat, 30 Apr 2005 04:11:31 GMT
Subject: Tkinter weirdness item count
References: <mailman.38.1114801266.14961.python-list@python.org>
Message-ID: <TzDce.363$6q1.22@trnddc09>


"phil" <phillip.watts at anvilcom.com> wrote in message
news:mailman.38.1114801266.14961.python-list at python.org...
> Using Tkinter Canvas to teach High School Geometry
> with A LOT of success.


Can you post a link to your code.
I'd like to see what you are doing.

Thx,
Alan Isaac




From rodney.maxwell at gmail.com  Sun Apr 17 21:14:52 2005
From: rodney.maxwell at gmail.com (Rodney Maxwell)
Date: 17 Apr 2005 18:14:52 -0700
Subject: python.exe on Mac OS X!?
References: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>
	<mailman.2033.1113780805.1799.python-list@python.org>
Message-ID: <1113786892.458768.95420@z14g2000cwz.googlegroups.com>

>> executable produced was 'python.exe'. Can someone tell me whether
this
>> is a bug, feature, or UserError?

> I'm not sure. Why don't you grab the binary?

> http://www.python.org/ftp/python/2.4.1/MacPython-OSX-2.4.1-1 .dmg

Because I need to keep multiple versions of Python on this machine, and
as far as I can tell the binary installer overwrites the default
installed version.
I could be wrong.



From steven.bethard at gmail.com  Sat Apr 23 23:21:08 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 23 Apr 2005 21:21:08 -0600
Subject: Variables
In-Reply-To: <mailman.2368.1114311072.1799.python-list@python.org>
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
Message-ID: <ZMydnQbLxdM9jfbfRVn-hg@comcast.com>

Richard Blackwood wrote:
> Indeed, this language is math. My friend says that foo is a constant and 
> necessarily not a variable. If I had written foo = raw_input(), he would 
> say that foo is a variable.

Then what does he say if you write:

foo = 5
foo = 6

?

STeVe


From rupole at hotmail.com  Wed Apr 13 17:37:14 2005
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 13 Apr 2005 17:37:14 -0400
Subject: Read the windows event log
References: <d3i22b$e6p$1@netnews.hinet.net>
Message-ID: <425d91d3$1_1@127.0.0.1>

You'll need to read in a loop until no records are returned.

        Roger

"Austin" <austin at maxtronic.com.tw> wrote in message 
news:d3i22b$e6p$1 at netnews.hinet.net...
> My codes are below:
>
> ***********************************
> import win32evtlog
>
> def check_records(records):
>    for i in range(0,len(records)):
>        print records[i].SourceName
>
> h = win32evtlog.OpenEventLog(None,"System")
> flags = 
> win32evtlog.EVENTLOG_BACKWARD_READ|win32evtlog.EVENTLOG_SEQUENTIAL_READ
> records = win32evtlog.ReadEventLog(h,flags,0)
>
> print "Total " + str(len(records))
> check_records(records)
>
> ************************************
>
> The result from my codes are total 2.
> But the event log in windows event viewer are 24.
> How could I get all events?
> 




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


From jerf at jerf.org  Fri Apr  1 18:38:18 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 18:38:18 -0500
Subject: How To Do It Faster?!?
References: <mailman.1211.1112396440.1799.python-list@python.org>
Message-ID: <pan.2005.04.01.23.38.17.496603@jerf.org>

On Sat, 02 Apr 2005 01:00:34 +0200, andrea_gavana wrote:

> Hello Jeremy & NG,
> ...
> I hope to have been clearer this time...
> 
> I really welcome all your suggestions.

Yes, clearer, though I still don't know what you're *doing* with that data :-)

Here's an idea to sort of come at the problem from a different angle. Can
you run something on the file server itself, and use RPC to access it?

The reason I mention this is a lot of UNIXes have an API to detect file
changes live; for instance, google "python fam". It would be easy to hook
something up to scan the files at startup and maintain your totals live,
and then use one of the many extremely easy Python RPC mechanisms to
request the data as the user wants it, which would most likely come back
at network speeds (fast).

This would be orders of magnitude faster, and no scanning system could
compete with it.


From caneff at gmail.com  Tue Apr  5 14:22:59 2005
From: caneff at gmail.com (ChinStrap)
Date: 5 Apr 2005 11:22:59 -0700
Subject: Best editor?
Message-ID: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>

When not using the interactive prompt, what are you using? I keep
hearing everyone say Emacs, but I can't understand it at all. I keep
trying to learn and understand why so many seem to like it because I
can't understand customization even without going through a hundred
menus that might contain the thing I am looking for (or I could go
learn another language just to customize!).

Personally I like SciTE, it has everything I think a midweight editor
should: code folding, proper python support, nice colors out of the
box, hotkey access to compile (I'm sure emacs does this, but I couldn't
figure out for the life of me how), etc.

Opinions on what the best is? Or reading I could get to maybe sway me
to Emacs (which has the major advantage of being on everyone's system).



From robin at reportlab.com  Tue Apr 26 07:12:29 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 26 Apr 2005 12:12:29 +0100
Subject: regex over files
In-Reply-To: <d4l1o8$65v$1@sea.gmane.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk><426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>
	<d4l1o8$65v$1@sea.gmane.org>
Message-ID: <426E221D.5020005@chamonix.reportlab.co.uk>

Steve Holden wrote:
......
> 
> I seem to remember that the Medusa code contains a fairly good 
> overlapped search for a terminator string, if you want to chunk the file.
> 
> Take a look at the handle_read() method of class async_chat in the 
> standard library's asynchat.py.
.....
thanks I'll give it a whirl

-- 
Robin Becker



From greg at cosc.canterbury.ac.nz  Tue Apr  5 23:22:49 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 06 Apr 2005 15:22:49 +1200
Subject: Super Newbie Question
In-Reply-To: <1112694325.360762.53260@z14g2000cwz.googlegroups.com>
References: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
	<3be704F6gh9p1U1@individual.net>
	<1112694325.360762.53260@z14g2000cwz.googlegroups.com>
Message-ID: <3bh30kF697tgeU1@individual.net>

Joey C. wrote:
> the issue with the
> temporary file is that when I write something new to it, if the old
> contents of the file was larger, not all of it will be overwritten.

Not if you open it with

   f = open(filename, "w")

which will delete any previous contents the file
may have had.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From has.temp2 at virgin.net  Sat Apr  9 21:30:18 2005
From: has.temp2 at virgin.net (has)
Date: 9 Apr 2005 18:30:18 -0700
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60_=28newsgroup-post_127=29?=
In-Reply-To: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
Message-ID: <1113096618.274442.78850@f14g2000cwb.googlegroups.com>

No, the greatest news ever would be that Usenet spammers are being
riveted to trees.



From fdreger at amiga.pl  Sat Apr 23 16:19:48 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Sat, 23 Apr 2005 22:19:48 +0200
Subject: func_code vs. string problem
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
Message-ID: <d4easv$rgm$1@nemesis.news.tpi.pl>

I came up with a simpler description of the problem.
It's all in the simple source:

# we define 'print b' in three different ways: as a string,
# a bytecode and a function
string="print b"
code=compile(string,'string','exec')
def function():
    print b

# now we make functions that test if it is possible to execute 'print 
b'
# in some local scope

def execstring():
    b=5
    exec string

def execfunction():
    b=5
    exec function.func_code

def execcode():
    b=5
    exec code

execstring()   # works
execcode()     # works
execfunction() # throws name error exception...

My problem is that both 'string' and 'code' are references to code 
objects, so they _should_ behave in the same way... I am close to 
giving up...
I am trying to find a way of executing functions without creating a 
nested scope, so they can share local and global namespace (even if 
they are declared in some other module). I _could_ turn them into 
strings and pass around as compiled objects, butthis would be very 
ugly. I am sure Python has some better, cleaner way to do this.

regards,
Filip Dreger 




From mauriceling at acm.org  Fri Apr 15 10:31:40 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sat, 16 Apr 2005 00:31:40 +1000
Subject: RE Engine error with sub()
References: <d3nhqk$dlo$1@domitilla.aioe.org> <425f85a2$1@news.uni-ulm.de>
Message-ID: <d3oj88$pja$1@domitilla.aioe.org>

Hi Dennis,

Dennis Benzinger wrote:

> Maurice LING schrieb:
> 
>> Hi,
>>
>> I have the following codes:
>>
>> from __future__ import nested_scopes
> 
>  > [...]
> 
> Are you still using Python 2.1?
> 
> In every later version you don't need the
> "from __future__ import nested_scopes" line.
> 
> So, if you are using Python 2.1 I strongly recommend
> upgrading to Python 2.4.1.
> 

I am using Python 2.3.5, installed using Fink. That is the latest 
version Fink has to offer.

>> [...]
>> It all works well for rule count up to 800+ but when my replacement 
>> rules swells up to 1800+, it gives me a runtime error that says 
>> "Internal error in regular expression engine"... traceable to "return 
>> self.regex.sub(self, text)" in substitute() method.
>> [...]
> 
> 
> I didn't read your code, but this sounds like you have a problem with 
> the regular expression engine being recursive in Python versions < 2.4.
> Try again using Python 2.4 or later (i.e. Python 2.4.1). The new regular 
> expression engine is not recursive anymore.
> 

Apparently this problem had been reported in Bugs item #857676 
(http://mail.python.org/pipermail/python-bugs-list/2003-December/021473.html) 
and (http://www.lehuen.com/nicolas/index.php/Pytst/2005/04). Bugs item 
#857676 is consistent with my problem as in it works with smaller lists 
(~1000) but not much bigger than that. The problem seems to lie in the 
fact that the SRE engine works on a 16-bit opcode...

Cheers
Maurice


From dave at pythonapocrypha.com  Sat Apr  9 12:23:08 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Sat, 09 Apr 2005 10:23:08 -0600
Subject: Are circular dependencies possible in Python?
In-Reply-To: <IEosBE.GtB@bath.ac.uk>
References: <IEosBE.GtB@bath.ac.uk>
Message-ID: <4258016C.6040402@pythonapocrypha.com>

Tim Tyler wrote:
> Like C, Python seems to insist I declare functions before calling
> them - rather than, say, scanning to the end of the current script
> when it can't immediately find what function I'm referring to.

Yes and no. Yes, they have to exist before you can use them (that only makes 
sense), but no, they don't have to be placed in the same order in the source 
code like they do with C:

 >>> def A(count):
...   print 'A', count
...   B(count + 1)
...
 >>> def B(count):
...   print 'B', count
...   if count < 10:
...     A(count + 1)
...
 >>> B(0)
B 0
A 1
B 2
...

See - all that matters is that they exist before you call them.

-Dave


From sabbey at u.washington.edu  Sat Apr 16 16:58:38 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 13:58:38 -0700
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <mailman.1997.1113635188.1799.python-list@python.org>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<42607b0f$1_2@newspeer2.tds.net>
	<mailman.1997.1113635188.1799.python-list@python.org>
Message-ID: <Pine.A41.4.61b.0504161319250.132108@dante73.u.washington.edu>

Shane Hathaway wrote:
> Kent Johnson wrote:
>> Brian Sabbey wrote:
>>> Using suite-based keyword arguments, the code
>>>
>>> f(x = 1)
>>>
>>> is equivalent to
>>>
>>> f():
>>>    x = 1
>>
>>
>> ISTM the syntax is ambiguous. How do you interpret
>> if f():
>>   x = 1
>> ?
>>
>> Is a suite alllowed only when a block could not be introduced in the
>> current syntax?
>
> I like this PEP a lot, but your concern is valid.  Maybe Brian could
> modify the PEP slightly to disambiguate.  How about using an ellipsis in
> the argument list to signify suite-based keywords?  Examples:
>
> f(...):
>    x = 1
>
> class C(object):
>   x = property(...):
>      doc = "I'm the 'x' property."
>      def fget(self):
>         return self.__x
>      def fset(self, value):
>         self.__x = value
>      def fdel(self):
>         del self.__x
>
> d = dict(...):
>    a = 1
>    b = 2
>
> Using an ellipsis in a statement that would begin a different kind of
> block is illegal and generates a syntax error.  Note that this usage
> seems to fit well with the definition of "ellipsis".
>
> http://dictionary.reference.com/search?q=ellipsis
>
> Shane

Yes, my description of the syntax was ambiguous.  To clarify, I intended 
the syntax to be backwardly compatible.  That is, one would not be able to 
use a suite to define keywords if there already exists a suite for other 
reasons.  So, one would not be able to use a suite to pass keywords to 'f' 
in this situation:

if f():
      x = 1

This code should behave exactly as it does now.

I agree that the ellipsis idea probably makes the code more readable, and 
it may be a good idea to have them for that reason.  However, ellipses are 
not necessary as a way to disambiguate the syntax; all statements 
containing suites currently begin with a keyword, and keyword suites would 
not.

-Brian


From mwm at mired.org  Sat Apr 23 18:31:22 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 23 Apr 2005 17:31:22 -0500
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<86k6musact.fsf@guru.mired.org>
	<od1l61pdetidh0ilequraj24fk2l3nu0l8@4ax.com>
Message-ID: <867jitrupx.fsf@guru.mired.org>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> On Fri, 22 Apr 2005 17:41:22 -0500, Mike Meyer <mwm at mired.org> declaimed
> the following in comp.lang.python:
>
>> No, you don't. My print system does that, and I don't have acrobat
>> installed. I have ghostscript installed, which includes pdf2ps - which
>> handles this particular translation.
>>
> 	Okay, so you've converted one page layout language (PDF) to
> another (PS)... To actually print it you still need a RIP. A PostScript
> laser printer has the RIP built-in, but consumer level Windows printers
> do not have a PostScript RIP -- and some printers don't even have their
> own specific RIP built-in ("winprinters" put the RIP into the software
> driver that runs on the Windows machine, rather than sending drawing
> commands to the printer for rendering).

RIP? That term is to generic for google to be much use.

If you're saying you need a tool to convert from PDF to whatever the
printer understands, you're right. You can't avoid that. On Unix, PS
is used as the "universal" printer language. Unix vendors selling
printers sold PS printers 20 years ago. That's when apsfilter showed
up on the scene, automatically converting everything to PS to send it
to the printer. (These days, magicfilter is a much better tool than
apsfilter, though it's harder to install). That's why a "competent"
printer installation these days will include ghostscript (or something
equivalent) to drive the printer, and why my primary printer speaks
PostScript.

I disagree with your description of WinPrinters. Those are printers to
stupid to handle flat ASCII, so your computer has to convert flat
ASCII files to postscript or some other graphics format before you can
print them. (This is where magicfilter beats apsfilter - apsfilter
converts ASCII to PS to graphics images, whereas magicfilter can pass
the text straight through. This has caused apsfilter to fail on some
systems where magicfilter would work like a charm).  Such printers
typically only come with drivers for Windows, and are completely
useless - unable to even print flat ASCII text - on other systems,
hence the moniker "WinPrinters". Non-winprinters can be used to print
flat ASCII without a driver of any kind. GhostScript now includes
graphics drivers for several winprinters.

The only way to have Python render PDF (or PS, or JPEG, or any other
graphics format) without a "driver" of some kind is to write the
driver in Python. That's a pretty silly thing to want to do. For one
thing, the performance will probably suck. For another, there are lots
of drivers already written that you can use.

The only thing better than writing it in Python is finding that
someone else has already written it.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From bvande at po-box.mcgill.ca  Mon Apr 11 12:31:09 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 11 Apr 2005 12:31:09 -0400
Subject: variables exist
In-Reply-To: <d3e0jj$93d$1@sea.gmane.org>
References: <9622d535.0504110552.1e070e8d@posting.google.com>
	<d3e0jj$93d$1@sea.gmane.org>
Message-ID: <425AA64D.1060806@po-box.mcgill.ca>

Fredrik Lundh said unto the world upon 2005-04-11 10:14:
> "fabian" wrote:
> 
>>how testing if a variable exists in python as isset in php??
> 
> 
> try:
>     variable
> except NameError:
>     print "variable not set"
> 
> but that is really lousy Python; better make sure you always assign to
> all variables, and use None (or another suitable value) to mark that some
> variable has no meaningful content right now.
> 
> that is, instead of

<SNIP full try/except example>

> write
> 
>     variable = None
> 
>     if condition:
>         variable = 1
> 
>     ...
> 
>     if variable is None:
>         print "variable not set"
> 
> </F> 


Hi Fredrik and all,

I'm a hobbyist and still learning, but the claim the try/except is
"lousy Python" surprise me a bit. The try/except way seems like an
instance of "Easier to ask Forgiveness than Permission", and my sense
is that in 95% of cases that approach is widely considered more 
Pythonic than LBYL (of which the suggested idiom seems reminiscent).

As it happens, most of my code does preset names to None, but reading
this thread made me wonder. Are you suggesting setting to None is
better as it makes explicit that there is nothing there, but this may
change in the future? (This is why I do it.) Or for some other reason?

I have no partisan interests either way; I'm just trying to 
understand. Thanks and best,

Brian vdB




From fuzzyman at gmail.com  Thu Apr 28 06:26:10 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 28 Apr 2005 03:26:10 -0700
Subject: interactive web graphics
In-Reply-To: <mailman.2600.1114635374.1799.python-list@python.org>
References: <mailman.2600.1114635374.1799.python-list@python.org>
Message-ID: <1114683970.740020.152180@o13g2000cwo.googlegroups.com>

Hello Michael,

Eckhoff, Michael A wrote:
> Hello,
>
> I failed to locate a list for pygtk, so I thought I'd
> ask my question here. Is it possible to write CGI
> scripts that bring up a GUI (as in GTK+, QT, Tk, ...)
> or an openGL display that is windowed inside a web
> browser?
>
> The answer would seem to me to be no, since the
> client could be Windows or Linux. I'd like to
> display some pretty graphics (scientific visualisation),
> but web applications are not my background.
>
> I would like a form with progress bars, but I guess
> that would have to be implemented in some special way.
> Sorry if these questions are ill-posed; I am just
> getting my feet wet with python.
>

There is a simpler, but still non-trivial, way of adding server-client
interactivity - using javascript. If you are just moving square bars
around you could use the javascript XML http request functions and
dynamically change the images (including using PIL - and maybe some of
the graph generating stuff from 'pythonweb' web modules - to
dynamically generate images server side).

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python


> Thanks,
> Michael E
>
> PS Congratulations for having such wonderful documentation
> on all things python.



From g.brandl at gmx.net  Wed Apr  6 01:25:35 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Wed, 06 Apr 2005 07:25:35 +0200
Subject: "specialdict" module
In-Reply-To: <3bamhhF6j009lU1@individual.net>
References: <3bamhhF6j009lU1@individual.net>
Message-ID: <3bha55F6dj9omU2@individual.net>

Georg Brandl wrote:
> Hello,
> 
> in follow-up to the recent "dictionary accumulator" thread, I wrote a
> little module with several subclassed dicts.
> 
> Comments (e.g. makes it sense to use super), corrections, etc.? Is this
> PEP material?
> 
> Docstrings, Documentation and test cases are to be provided later.

So, no further interest in this? Or should I write a PEP before?

mfg
Georg


From Alexej.Goehring at arup.com  Thu Apr 21 07:51:16 2005
From: Alexej.Goehring at arup.com (Alexej Goehring)
Date: Thu, 21 Apr 2005 12:51:16 +0100
Subject: Python & Mayavi Problem
Message-ID: <079149C0072B0A45BBFC6445329047F5DC5BD8@ardnts01.global.arup.com>

Hi,

 

I read your Mayavi question from about a year ago, because I have
exactly the same problem. I believe it has to do with windows, because I
have seen it work under Linux. Did anyone reply to your query and if so,
do you know why the screen goes red?

 

I attached your email so that you know what I am talking about.

 

 

Thanks

 

Alexej

 

Hello NG,
 
      I'm trying to follow the mayavi documentation in order to run
mayavi from python. In "Chapter 4. Using MayaVi from Python", there is
a simple example like this:
 
# generate the data.
from Numeric import *
import scipy
x = (arange(50.0)-25)/2.0
y = (arange(50.0)-25)/2.0
r = sqrt(x[:,NewAxis]**2+y**2)
z = 5.0*scipy.special.j0(r)  # Bessel function of order 0
# now dump the data to a VTK file.
import pyvtk
# Flatten the 2D array data as per VTK's requirements.
z1 = reshape(transpose(z), (-1,))
point_data = pyvtk.PointData(pyvtk.Scalars(z1))
grid = pyvtk.StructuredPoints((50,50, 1), (-12.5, -12.5, 0), (0.5,
0.5, 1))
data = pyvtk.VtkData(grid, point_data)
data.tofile('test.vtk')
 
import mayavi
v = mayavi.mayavi() # create a MayaVi window.
d = v.open_vtk('test.vtk', config=0) # open the data file.
# The config option turns on/off showing a GUI control for the
data/filter/module.
# load the filters.
f = v.load_filter('WarpScalar', config=0) 
n = v.load_filter('PolyDataNormals', 0)
n.fil.SetFeatureAngle (45) # configure the normals.
# Load the necessary modules.
m = v.load_module('SurfaceMap', 0)
a = v.load_module('Axes', 0)
a.axes.SetCornerOffset(0.0) # configure the axes module.
o = v.load_module('Outline', 0)
v.Render() # Re-render the scene.
 
Everything goes fine, but at the end I obtain the mayavi window
completely red (without the expected surface/image), and when I click
on this window I get different errors depending on which Python editor
I run:
 
1) Pythonwin: Error: Microsoft Visual C++ Runtime Error. Everything
Crashes. After this, I get a vtkwindow coming up and showing me the
"always-present" error message from mayavi:
 
"Generic Warning: In 
/debian/stage/vtk-4.2.4/Rendering/vtkTkRenderWidget.cxx, line 638
A TkRenderWidget is being destroyed before it associated
vtkRenderWindow
is destroyed. This is very bad and usually due to the order in which 
objects are being destroyed. Always destroy the vtkRenderWindow before
destroying the user interface components"
 
I don't know why, but with mayavi this warning is EXTREMELY common...
 
2) IDLE for Python: All is frozen, nothing happen, I have to kill
Python;
3) Python Command Line: No windows appears, nothing happen.
 
Moreover, I would like to be able to compile my Python application to
a standalone EXE file by using py2exe, but py2exe complains about some
missing modules (either from mayavi and for scipy), and the created
EXE does not start.
I have installed Python using the Enthought Installer for Python (with
lots of site-packages inside), located at:
 
http://www.enthought.com/python/
 
I'm running Win2000, without administrator privileges (if this can
make differences).
 
Does anyone have an idea?
 
Thanks for every suggestion.
 
Andrea.

 

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From Scott.Daniels at Acm.Org  Fri Apr  1 11:27:49 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 01 Apr 2005 08:27:49 -0800
Subject: Ternary Operator in Python
In-Reply-To: <114qjnjg54nnkd3@news.supernews.com>
References: <mailman.1172.1112340286.1799.python-list@python.org>
	<114qjnjg54nnkd3@news.supernews.com>
Message-ID: <424d715b$1@nntp0.pdx.net>

John Roth wrote:
> 
> "praba kar" <prabapython at yahoo.co.in> wrote in message 
> news:mailman.1172.1112340286.1799.python-list at python.org...
> 
>> Dear All,
>>    I am new to Python.  I want to know how to
>> work with ternary operator in Python.  I cannot
>> find any ternary operator in Python.  So Kindly
>> clear my doubt regarding this
> 
> 
> There isn't one, and there won't be one unless Guido
> changes his mind, and that's quite unlikely.

Au contraire, mon frere:

There is a ternary operator in Python (fairly ill-documented)
Its name is "partial polynomial eval."  As is traditional in
implementing ternary operations in computer languages, the
name of the operator does not show up anywhere in the code,
so many people don't realize they are using it.  Here is an
example of the "ppe" used to evaluate a cubic, using the
ternary operator three times in a single statement:

     def cubic(x, a, b, c, d):
         return ((a * x + b) * x + c) * x + d

As you may be able to guess, the more common name is "*+",
and it is a nice self-documenting operator (it behaves just
like the primitives).  Originally the DEC Vax provided this
as a "vectorized" opcode, which is where Python got the
idea.  You probably don't see it since you aren't doing much
engineering work.

--Scott David Daniels
Scott.Daniels at Acm.Org

-- No truth has been harmed by this April Fool's post. :-)


From rkern at ucsd.edu  Mon Apr 25 10:56:55 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 07:56:55 -0700
Subject: What do list comprehensions do that generator expressions don't?
In-Reply-To: <40E605146701DE428FAF21286A97D3090457E42F@wphexa02.corp.lh.int>
References: <40E605146701DE428FAF21286A97D3090457E42F@wphexa02.corp.lh.int>
Message-ID: <d4j065$dh7$1@sea.gmane.org>

Mark English wrote:
>>Date: Mon, 25 Apr 2005 08:51:17 -0500
>>From: Mike Meyer <mwm at mired.org>
> 
> 
>>Which means that the real rule should be always use generator
> 
> expressions,
> 
>>unless you *know* the expression will always fit in memory.
> 
> 
>>Which leads to the obvious question of why the exception.
> 
> <code>
> 
>>>>l = [(1, 2), ('a', 'b'), (3, 2), (23, 32)]
>>>>l
> 
> [(1, 2), ('a', 'b'), (3, 2), (23, 32)]
> </code>
> This screen dump of the object is quite useful to me.
> 
> <code>
> 
>>>>r = reversed(l)
>>>>r
> 
> <listreverseiterator object at 0x009D2B90>
> </code>
> This screen dump of the object is less useful to me.
> 
>>From a pure programming point of view it's not a sufficient reason to
> keep list comprehensions, especially as the interpreter shell could be
> massaged into giving more output, but right here right now it's a lot
> easier to read the former than the latter IMHO.
> 
> (That is assuming I'm right in assuming functions like "reversed" are
> generator expressions).

No, generator expressions are like list comprehensions, only they create 
generator objects.

(x*x for x in xrange(1000))

versus

[x*x for x in xrange(1000))

Of course, one can always get an explicit list by passing the generator 
  object to list(). This also works for most iterables like the one you 
showed above.

list(x*x for x in xrange(1000))

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From martin.witte at gmail.com  Tue Apr  5 15:18:02 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 5 Apr 2005 12:18:02 -0700
Subject: oracle interface
In-Reply-To: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <1112728682.954192.66150@o13g2000cwo.googlegroups.com>

We use cx_oracle, for us it has proven to be very stable running on
Solaris.



From news at andyjeffries.co.uk  Fri Apr 15 11:35:55 2005
From: news at andyjeffries.co.uk (Andy Jeffries)
Date: Fri, 15 Apr 2005 15:35:55 GMT
Subject: Determine ip address
In-Reply-To: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
References: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
Message-ID: <vbR7e.8819$za2.611@news.easynews.com>

codecraig wrote:
> hi,
>    how can i use python to figure the ip address of the machine which
> the python script is running on?  I dont mean like 127.0.0.1....but i
> want the external IP address (such as ipconfig on windows displays).

I use the following (all on one line):

external_ip = os.popen("/sbin/ifconfig eth0|/bin/grep inet|/bin/awk
'{print $2}' | sed -e s/.*://", "r").read().strip()

Cheers,


Andy


From tjreedy at udel.edu  Thu Apr 21 18:15:22 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 18:15:22 -0400
Subject: Dictionary question.
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
Message-ID: <d498da$6mb$1@sea.gmane.org>


"hawkesed" <olaamigoquepasa at hotmail.com> wrote in message 
news:1114076862.063504.256970 at g14g2000cwa.googlegroups.com...
> Hi,
>  I am semi new to Python. Here is my problem : I have a list of 100
> random integers. I want to be able to construct a histogram out of the
> data. So I want to know how many 70's, 71's, etc. I can't figure out
> how to do this. A dictionary is supposedly can do key value pairs
> right? I want to be able to see if say 75 is in the data structure, and
> what its value is, then increment its value as I go through the list
> finding items.
>  I am sure there is a way to do this. Is a dictionary what I should be
> using? Thanks for any help. Hope this makes sense, its getting very
> late here.

The goal of making a histogram implies that there more numbers in rlist 
than possible values in range[min(rlist), max(rlist)+1].  I would use a 
list.

freq = [0]*(rmax-rmin+1)
for i in randomlist: freq[rmin+i] += 1

You can then further combine bins as needed for a histogram.
If your distribution is sparse instead of compact, a dict would be better, 
but 'random integer [in a range]' usually implies compactness.

Terry J. Reedy





From aisaac0 at verizon.net  Tue Apr  5 10:29:16 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Tue, 05 Apr 2005 14:29:16 GMT
Subject: cross platform printing
Message-ID: <0hx4e.3479$3O2.2184@trnddc01>

"Alan Isaac" <aisaac0 at verizon.net> wrote in message
news:_A34e.2207$1r6.248 at trnddc02...
> I'd like to try personal financial management using Python.
> I just found PyCheckbook, but it does not support check printing.
> Is there a Python check printing application kicking around?


OK, I'll assume silence means "no", so new question:
What is the current best practice for cross platform printing of PostScript
files from Python?
Same question for PDF.  (I'm aware of
URL:http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html.)

Thanks,
Alan Isaac





From tjreedy at udel.edu  Mon Apr  4 04:33:54 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 4 Apr 2005 04:33:54 -0400
Subject: Help me dig my way out of nested scoping
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com><mailman.1274.1112569810.1799.python-list@python.org>
	<1112571347.299876.275890@f14g2000cwb.googlegroups.com>
Message-ID: <d2qu23$44r$1@sea.gmane.org>


"Brendan" <spam4bsimons at yahoo.ca> wrote in message 
news:1112571347.299876.275890 at f14g2000cwb.googlegroups.com...
>F -is- in fact an iterative optimizer that minimizes A on x (B is the
> derivative of A).  So yes, F will call A and B on mulitple 'x's.   In
> that case, it seems the mutable object trick is the way to go.  Thanks.

As long as it calls A and B in that same order, rather than A several times 
and B several times, then my code, fleshed out, will probably work.
>
> I didn't follow your last sentence.  What about the Python Cookbook?

It is a book that is one place to find memoizer code which allows one to 
save several x,f(x) pairs at once for later reuse.  But you don't seem to 
need it since an optimizer should never return to the exact same x except 
by accident.

Terry J. Reedy

 





From greg at cosc.canterbury.ac.nz  Sun Apr  3 22:37:49 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Mon, 04 Apr 2005 14:37:49 +1200
Subject: property and virtuality
In-Reply-To: <mailman.1128.1112268435.1799.python-list@python.org>
References: <mailman.1128.1112268435.1799.python-list@python.org>
Message-ID: <4250A87D.2010402@cosc.canterbury.ac.nz>

Laszlo Zsolt Nagy wrote:
> 
> My problem is about properties and the virtuality of the methods. I 
> would like to create a property whose get and set methods
> are virtual.

You might find the following function useful, which I
developed for use in PyGUI.

   def overridable_property(name, doc = None):
     """Creates a property which calls methods get_xxx and set_xxx of
     the underlying object to get and set the property value, so that
     the property's behaviour may be easily overridden by subclasses."""

     getter_name = intern('get_' + name)
     setter_name = intern('set_' + name)
     return property(
         lambda self: getattr(self, getter_name)(),
         lambda self, value: getattr(self, setter_name)(value),
         None,
         doc)

Usage example:

   class MyClass(object):
     ...
     spam = overridable_property('spam', "Favourite processed meat product")
     ...

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From grante at visi.com  Mon Apr  4 16:06:24 2005
From: grante at visi.com (Grant Edwards)
Date: Mon, 04 Apr 2005 20:06:24 -0000
Subject: Changing TEXT color from python
References: <1112644779.486105.179240@l41g2000cwc.googlegroups.com>
Message-ID: <11537i028ddb407@corp.supernews.com>

On 2005-04-04, GujuBoy <dirgesh at gmail.com> wrote:

> so i am writing a program in Python and i want to print out a few
> statements in Different colors
>
> for example "Print hello world in RED, and "GOOD BYE in blue" "
>
> how can i do this...

Depends on what you're printing on.

tty?
    curses 
    os.popen('tput')

printer?    
    reportlab

> and hopefully without including any external modules.

I suppose you can pick an output device and hard-wire the
escape sequences into your code.

-- 
Grant Edwards                   grante             Yow!  SHHHH!! I hear SIX
                                  at               TATTOOED TRUCK-DRIVERS
                               visi.com            tossing ENGINE BLOCKS into
                                                   empty OIL DRUMS...


From mwm at mired.org  Sat Apr  9 17:47:31 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 09 Apr 2005 16:47:31 -0500
Subject: visibility between modules
References: <_PX5e.1205415$35.44366387@news4.tin.it>
Message-ID: <8664yvwrkc.fsf@guru.mired.org>

"max(01)*" <max2 at fisso.casa> writes:

> hi.
>
> if i have a single program file, different class instances can share
> information in (at least) two fashions:
>
> 1. using instance variables:
>
> class AClass:
>    def __init__(self):
>      self.att_1 = 42
>      self.att_2 = "Hello!"
>
> class AnotherClass:
>    def __init__(self):
>      self.att_1 = anInstanceOfAClass.att_1
>
> anInstanceOfAClass = AClass()
> anInstanceOfAnotherClass = AnotherClass()
> print anInstanceOfAnotherClass.att_1  ### This should print out 42
>
> 2. using globals:
>
> class AClass:
>    def __init__(self):
>      self.att_1 = 42
>      self.att_2 = "Hello!"
>
> class AnotherClass:
>    pass
>
> aGlobalString = "No way."
> anInstanceOfAClass = AClass()
> anInstanceOfAClass.att2 = aGlobalString
> anInstanceOfAnotherClass = AnotherClass()
> anInstanceOfAnotherClass.att_1 = aGlobalString
> print anInstanceOfAClass.att2  ### This should output "No way."
> print anInstanceOfAnotherClass.att_1  ### And this too


Both these methods actually use globals. In ther first case, the
global is "anInstanceOfAClass", that is bound to self.att_1 in the
__init__ method of AnotherClass.

The solution is to pass the instance in as a parameter:

class AClass:
      def __init__(self):
          self.att_1 = 42
          self.att_2 = "Hello!"

class AnotherClass:
      def __init__(self, instance):
          sefl.att_1 = instance

anInstanceOfAClass = AClass()
anInstanceOfAnotherClass = AnotherClass(anInstanceOfAClass)

or maybe just:

anInstaceOfAnotherClass = AnotherClass(AClass())


       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From reinhold-birkenfeld-nospam at wolke7.net  Tue Apr 26 14:48:10 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Tue, 26 Apr 2005 20:48:10 +0200
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <861x8ynha0.fsf@guru.mired.org>
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
	<426ddda7.553554359@news.oz.net> <861x8ynha0.fsf@guru.mired.org>
Message-ID: <3d7gqqF6rm5ecU1@individual.net>

Mike Meyer wrote:

> The question under these circumstances is then: do you want bare
> genexp to mean something? Right now, it's a syntax error. But there's
> no reason you couldn't have:
> 
>    y = x for x in stuff

I like

y = (x for x in stuff)

as it is, it's way more readable.

Reinhold


From ptmcg at austin.rr.com  Thu Apr 28 00:48:26 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Apr 2005 21:48:26 -0700
Subject: How do I parse this ? regexp ?
In-Reply-To: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
Message-ID: <1114663705.992945.159270@l41g2000cwc.googlegroups.com>

Jake -

If regexp's give you pause, here is a pyparsing version that, while
verbose, is fairly straightforward.  I made some guesses at what some
of the data fields might be, but that doesn't matter much.

Note the use of setResultsName() to give different parse fragments
names so that they are directly addressable in the results, instead of
having to count out "the 0'th group is the date, the 1'st group is the
time...".  Also, there is a commented-out conversion action, to
automatically convert strings to floats during parsing.

Download pyparsing at http://pyparsing.sourceforge.net.

Good luck,
-- Paul


data = """04242005 18:20:42-0.000002, 271.1748608, [-4.119873046875,
3.4332275390625, 105.062255859375], [0.093780517578125, 0.041015625,
-0.960662841796875], [0.01556396484375, 0.01220703125,
0.01068115234375]"""

from pyparsing import *

COMMA = Literal(",").suppress()
LBRACK = Literal("[").suppress()
RBRACK = Literal("]").suppress()

# define a two-digit integer, we'll need a lot of them
int2 = Word(nums,exact=2)
month = int2
day = int2
yr = Combine("20" + int2)
date = Combine(month + day + yr)

hr = int2
min = int2
sec = int2
tz = oneOf("+ -") + Word(nums) + "." + Word(nums)
time = Combine( hr + ":" + min + ":" + sec + tz )

realNum = Combine( Optional("-") + Word(nums) + "." + Word(nums) )
# uncomment the next line and reals will be converted from strings to
floats during parsing
#realNum.setParseAction( lambda s,l,t: float(t[0]) )

triplet = Group( LBRACK + realNum + COMMA + realNum + COMMA + realNum +
RBRACK )
entry = Group( date.setResultsName("date") +
          time.setResultsName("time") + COMMA +
          realNum.setResultsName("temp") + COMMA +
          Group( triplet + COMMA + triplet + COMMA + triplet
).setResultsName("coords") )

dataFormat = OneOrMore(entry)
results = dataFormat.parseString(data)

for d in results:
    print d.date
    print d.time
    print d.temp
    print d.coords[0].asList()
    print d.coords[1].asList()
    print d.coords[2].asList()

returns:

04242005
18:20:42-0.000002
271.1748608
['-4.119873046875', '3.4332275390625', '105.062255859375']
['0.093780517578125', '0.041015625', '-0.960662841796875']
['0.01556396484375', '0.01220703125', '0.01068115234375']



From fredrik at pythonware.com  Tue Apr  5 11:24:37 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 5 Apr 2005 17:24:37 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com><mailman.1280.1112603141.1799.python-list@python.org>	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net><mailman.1299.1112626394.1799.python-list@python.org>
	<4251d375$0$23625$9b622d9e@news.freenet.de>
Message-ID: <d2uaes$t53$1@sea.gmane.org>

"Martin v. L?wis" wrote:

>> I'm not aware of any other tool that solves that specific problem.
>
> notepad does a fine job at creating batch files, IMO.

have you used exemaker?  have you compared the behaviour of the
resulting executables to batch files using different environments, shells,
and OS versions?  or are you just guessing here?

</F> 





From bdesth.quelquechose at free.quelquepart.fr  Thu Apr 14 16:11:03 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 14 Apr 2005 22:11:03 +0200
Subject: Using python from a browser
In-Reply-To: <mailman.1928.1113506375.1799.python-list@python.org>
References: <mailman.1928.1113506375.1799.python-list@python.org>
Message-ID: <425eca46$0$865$636a15ce@news.free.fr>

Philippe C. Martin a ?crit :
> Hi,
> 
> I have a python script I wish to call from various browsers (IE; Mozilla, 
> Firefox ..) on Windows & Linux.

What do  you mean ? Is  that a client-side or server-side script ?

> I read that IE had the capability to embedd Python scripts, 

Where ?


From ksenia.marasanova at gmail.com  Tue Apr 26 02:21:33 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Tue, 26 Apr 2005 08:21:33 +0200
Subject: web based file manager in python
In-Reply-To: <VDebe.629$6z3.616@newssvr33.news.prodigy.com>
References: <mailman.2477.1114448699.1799.python-list@python.org>
	<VDebe.629$6z3.616@newssvr33.news.prodigy.com>
Message-ID: <130df193050425232126b8892a@mail.gmail.com>

> Ksenia - I recently came across this python web-based FM:
> 
> http://snakelets.sourceforge.net/filemgr/index.html
> 
> It is by Irmen De Jong, the author of Snakelets.
> 

Looks good! Thank you very much :)

-- 
Ksenia


From bokr at oz.net  Fri Apr 22 13:31:25 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 17:31:25 GMT
Subject: Persistent python object and the Web
References: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
Message-ID: <426924f0.244123250@news.oz.net>

On 21 Apr 2005 11:15:02 -0700, ramon.aragues at gmail.com wrote:

>Hi,
>
>I'd like to know if I am trying to do something impossible or I am just
>being unable to find how to do it. In the latter case, please... help
>me...
>
>I=B4ve implemented a python class Graph, which handles graphs (with its
>nodes, edges, finding paths, etc). In my text-menu interface, I can add
>nodes, delete nodes, add edges, find shortest routes, etc. I simply
>create a graph_object before presenting the text menu and then, when a
>user choses a command (eg. add-node) I call the method of this object
>with the appropiate parameters.
>
How much total data is involved in the state of the Graph object?
If it's typed in, it can't be that much? Or do you automatically generate
huge subtrees etc.? Anyway, the amount will influence your options.

Then the question is where you want the state to persist. A small amount
can be carried right in the url. Or in preset values in forms, which can
have hidden elements, or in javascript variables that are set from script
parts that represent the state, or cookies that can contain references to
data stored one way or another on the server.

>Now... I need to "translate" this text-menu interface  to a web
>interface. The same as the text-menu interface, but letting the user do
>it through the web. I have created an HTML that lets the user enter the
>parameters and chose which command to execute by pushing different
>buttons. But...
You could conceivably implement the whole thing via javascript in an html
page that runs entirely in the client browser, but that probably wouldn't
be as much fun as python ;-)

>
>My problem is that I don't know how to create a graph_object that
>remains persistent through time (it has to be the same graph_object for
>the first command as for the last one "pushed" by the user). I want to
>be able to create the object when the user enters the web page (by
>calling graph_object =3D Graph(id=3D"graph1")) and then make calls to
>graph_object methods when the user pushes a button.
>
>I'm using python2.3, mod_python and Apache.
>
>Any help will be greatly appreaciated.
>
If the state is not too huge, I think I might first create
Graph dump and load methods that would output a nice text
representation of the graph state, and then use a textarea
form element to carry that info, which would get submitted
along with the visible form data. (You could make it all visible
for debugging). You could roll your own format suitable for
textarea transfer. Or you might consider using pickle.Pickler
to create string representations of state info (even a whole tree
if you want to save everything) and maybe do something simple
to make the resulting string ok for a textarea (I don't know
if it can be used as is with protocol 0).
Then you could use pickle.Unpickler to reconstitute what you pickled
when it comes back to the server from the submittal of the textarea
(whose default content you set up each time you serve a web page)
when it comes back again.

Then on the server you can just create an empty Graph instance
an use the submitted textarea state for the load method, and then
go on with the indiviual command data, which would update the Graph
instance state and then you return a web page with the textarea
preset to whatever you get from your graph instance .dump method.

This would be just cgi with no server data base and no cookies or
any of that stuff. Everything persists in the page form data that
is handed back and forth. The client should be able to save the page
to disk  and bring it up again, and if your actions and hrefs are
absolute, they should go back to your server.

Anyway, you should be able to test this theory with a simple page
with a simple form. I may have forgotten some gotcha ;-)

If you have really big data, you might want to have it persist
on the server one way or another.

Regards,
Bengt Richter


From mahs at telcopartners.com  Thu Apr 21 18:30:00 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 21 Apr 2005 15:30:00 -0700
Subject: grouping subsequences with BIO tags
In-Reply-To: <wPidnSMBAONhgfXfRVn-sw@comcast.com>
References: <wPidnSMBAONhgfXfRVn-sw@comcast.com>
Message-ID: <d49984$8vf$1@sea.gmane.org>

Steven Bethard wrote:
> I have a list of strings that looks something like:
>     ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']


I'd have done it the same way as you, but here's 'another' way:

  >>> def grp(lst):
  ...     stack = []
  ...     for label in lst:
  ...         prefix = label[0]
  ...         if prefix == 'B':
  ...             group = [label]
  ...             stack.append(group)
  ...         elif prefix == 'I':
  ...             if group[0][2:] != label[2:]:
  ...                raise ValueError('%s followed by %s' %
  ...                              (group[0], label))
  ...             group.append(label)
  ...         elif prefix == 'O':
  ...             group = [label]
  ...     return stack
  ...
  >>>

  >>> grp(['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X'])
  [['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]
  >>>
  >>> grp(['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'O', 'I_X', 'B_X'])
  Traceback (most recent call last):
    File "<input>", line 1, in ?
    File "\\CC1040907-A\MichaelDocuments\PyDev\Junk\BIO.py", line 32, in grp
      raise ValueError('%s followed by %s' %
  ValueError: O followed by I_X

Michael



From abkhd at earth.co.jp  Mon Apr 11 20:13:59 2005
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 11 Apr 2005 17:13:59 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz>
	<mailman.1724.1113261387.1799.python-list@python.org>
Message-ID: <1113264839.497914.210170@z14g2000cwz.googlegroups.com>

Tony Meyer wrote:
> [problems with dependency on msvr71.dll snipped]
>
> One option is to create a Windows Python 2.4 installer that includes
a
> Python not built with MSVC7 - for example gcc or MSVC6 - which
doesn't have
> the dependency on mscvr71.dll.  Both VC6 and gcc are feasible,
although
> there may be a reasonable amount of work required.
>
> If the installer proved popular, then I'm sure the python-dev people
could
> be convinced (for 2.5, perhaps) that there should be an official
release of
> this type, much like there's a separate 64 bit installer available.
> (Assuming that patches could be submitted that made the build process
as
> seamless as the existing one).
>
> This seems a much more achievable goal than anything involving a
meeting
> with Microsoft...
>
> =Tony.Meyer


Kindly note that the Python source distribution does include project
files for building Python 2.4 with MSVC6. Add to that the fact that
with pyMinGW[1] one can build yet another Windows distribution not
dependent on mscvr71.dll and some of the logic about not upgrading to
Python 2.4, IMHO, just goes away.

An official release of installers for either or both versions would I
think complicate matters: more choices translate to more confusion.
Needless to say that extension authors (for Python 2.4) would then need
to make two binaries for every extension they release for Python 2.4:
one for the mscvr71.dll dependent Python distribution, and another one
for the mscvrt.dll dependent version(s). This I think would hurt Python
and its users.

The solution is to have those that know enough to really need to build
Python on their own according to their requirments. They would then
have to deal with compiling the Python 2.4 extensions themselves, of
course. But this would make things simple and hopefully address the
needs of everyone.


Regards,
Khalid



[1] pyMinGW:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From qwweeeit at yahoo.it  Tue Apr 12 12:57:53 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 12 Apr 2005 09:57:53 -0700
Subject: Removing comments... tokenize error
Message-ID: <2ab23d7a.0504120857.14ef094a@posting.google.com>

In analysing a very big application (pysol) made of almost
100 sources, I had the need to remove comments.

Removing the comments which take all the line is straightforward...

Instead for the embedded comments I used the tokenize module.

To my surprise the analysed output is different from the input
(the last tuple element should exactly replicate the input line)
The error comes out in correspondance of a triple string.
I don't know if this has already been corrected (I use Python 2.3)
or perhaps is a mistake on my part...

Next you find the script I use to replicate the strange behaviour:

import tokenize

Input = "pippo1"     
Output = "pippo2"     

f = open(Input)
fOut=open(Output,"w")

nLastLine=0
for i in tokenize.generate_tokens(f.readline):
.   if nLastLine != (i[2])[0]:   # the 3rd element of the tuple is
.   .   nLastLine = (i[2])[0]    # (startingRow, startingCol)
.   .   fOut.write(i[4])
        
f.close()
fOut.close()

The file to be used (pippo1) contains an extract:
        
class SelectDialogTreeData:
.   img = None
.   def __init__(self):
.   .   self.tree_xview = (0.0, 1.0)
.   .   self.tree_yview = (0.0, 1.0)
.   .   if self.img is None:
.   .   .   SelectDialogTreeData.img = (makeImage(dither=0, data="""
R0lGODlhEAAOAPIFAAAAAICAgMDAwP//AP///4AAAAAAAAAAACH5BAEAAAUALAAAAAAQAA4AAAOL
WLrcGxA6FoYYYoRZwhCDMAhDFCkBoa6sGgBFQAzCIAzCIAzCEACFAEEwEAwEA8FAMBAEAIUAYSAY
CAaCgWAgGAQAhQBBMBAMBAPBQDAQBACFAGEgGAgGgoFgIBgEAAUBBAIDAgMCAwIDAgMCAQAFAQQD
AgMCAwIDAgMCAwEABSaiogAKAKeoqakFCQA7"""), makeImage(dither=0, data="""
R0lGODlhEAAOAPIFAAAAAICAgMDAwP//AP///4AAAAAAAAAAACH5BAEAAAUALAAAAAAQAA4AAAN3
WLrcHBA6Foi1YZZAxBCDQESREhCDMAiDcFkBUASEMAiDMAiDMAgBAGlIGgQAgZeSEAAIAoAAQTAQ
DAQDwUAwAEAAhQBBMBAMBAPBQBAABACFAGEgGAgGgoFgIAAEAAoBBAMCAwIDAgMCAwEAAApERI4L
jpWWlgkAOw=="""), makeImage(dither=0, data="""
R0lGODdhEAAOAPIAAAAAAAAAgICAgMDAwP///wAAAAAAAAAAACwAAAAAEAAOAAADTii63DowyiiA
GCHrnQUQAxcQAAEQgAAIg+MCwkDMdD0LgDDUQG8LAMGg1gPYBADBgFbs1QQAwYDWBNQEAMHABrAR
BADBwOsVAFzoqlqdAAA7"""), makeImage(dither=0, data="""
R0lGODdhEAAOAPIAAAAAAAAAgICAgMDAwP8AAP///wAAAAAAACwAAAAAEAAOAAADVCi63DowyiiA
GCHrnQUQAxcUQAEUgAAIg+MCwlDMdD0LgDDQBE3UAoBgUCMUCDYBQDCwEWwFAUAwqBEKBJsAIBjQ
CDRCTQAQDKBQAcDFBrjf8Lg7AQA7"""))   

The output of tokenize (pippo2) gives instead:   
            
class SelectDialogTreeData:
.   img = None
.   def __init__(self):
.   .   self.tree_xview = (0.0, 1.0)
.   .   self.tree_yview = (0.0, 1.0)
.   .   if self.img is None:
.   .   .   SelectDialogTreeData.img = (makeImage(dither=0, data="""
AgMCAwIDAgMCAwEABSaiogAKAKeoqakFCQA7"""), makeImage(dither=0, data="""
jpWWlgkAOw=="""), makeImage(dither=0, data="""
BADBwOsVAFzoqlqdAAA7"""), makeImage(dither=0, data="""
CDRCTQAQDKBQAcDFBrjf8Lg7AQA7"""))

... with a big difference! Why?


From jbo at cannedham.ee.ed.ac.uk  Mon Apr  4 06:26:21 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Mon, 04 Apr 2005 11:26:21 +0100
Subject: Raise Error in a Module and Try/Except in a different Module
In-Reply-To: <7f285d16.0504040211.1e1b8783@posting.google.com>
References: <7f285d16.0504040211.1e1b8783@posting.google.com>
Message-ID: <d2r4nl$gjg$1@scotsman.ed.ac.uk>

Issa-Ahmed SIDIBE wrote:
> I Have a function FUNC1 that is define in ModuleA. This function raise
> an exception EXCP1 (raise EXCP1), with EXCP1 a global variable in
> ModuleA.
> 
> In ModuleB, I have some classes that call FUNC1. I would like to catch
> EXCP1 and make some processing. How can I do that.
> 
> I tried in Module B
> 
> import ModuleA
> ...
> class():
>    ...
>    try: a = ModuleA.FUNC1
>    except ModuleA.EXCP1: print 'catch'
> 
> But It does not work. What is wrong?

I'm just back from holiday so rusty but I tried to do this w few weeks ago.

What's the error?

Jim


From dcrespo at gmail.com  Mon Apr 11 16:28:00 2005
From: dcrespo at gmail.com (dcrespo)
Date: 11 Apr 2005 13:28:00 -0700
Subject: The convenient compiler for Python Apps and Distribution of it
Message-ID: <1113251280.923895.51860@l41g2000cwc.googlegroups.com>

Hi all...
There are py2exe, but it only works for Windows.
Which would be the convenient(s) compiler(s) to deploy an executable
that runs under Windows and under Linux (obviously, they have to be
from different source of program compiler)...
Any comments? (write the Pros and Cons of each one please)



From bvande at po-box.mcgill.ca  Mon Apr 11 02:02:31 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 11 Apr 2005 02:02:31 -0400
Subject: Doubt regarding sorting functions
In-Reply-To: <20050411045012.18146.qmail@web8406.mail.in.yahoo.com>
References: <20050411045012.18146.qmail@web8406.mail.in.yahoo.com>
Message-ID: <425A12F7.3020507@po-box.mcgill.ca>

praba kar said unto the world upon 2005-04-11 00:50:
> Dear All,
> 
>           I am new to Python.  I am in need of
> some sorting functions (eg) numerical sorting
> functions and alphapetical sorting functions. 
> I have searched through net But I cannot
> find any regarding this so If anyone know
> regarding this. Kindly mail me as early as possible
> 
> with regards
> PRabahr

Hi PRabahr,

 >>> some_references = [
   "<http://docs.python.org/lib/built-in-funcs.html> (look for 'cmp')",
   "<http://docs.python.org/lib/typesseq-mutable.html> (read fn 8)",
   "<http://aspn.activestate.com/ASPN/Cookbook/Python?kwd=Searching>",
   "<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52234> ]
 >>> some_references.sort()
 >>> for r in some_references:
         print r

<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52234>
<http://aspn.activestate.com/ASPN/Cookbook/Python?kwd=Searching>
<http://docs.python.org/lib/built-in-funcs.html> (look for 'cmp')
<http://docs.python.org/lib/typesseq-mutable.html> (read fn 8)>>>
 >>>

If you want to implement a specific sorting routine, the two dominant 
ways are to either use the decorate-sort-undecorate idiom or define a 
custom cmp function. Both are discussed in the links above.

Best wishes,

Brian vdB


From steven at lczmsoft.com  Wed Apr  6 03:46:18 2005
From: steven at lczmsoft.com (narke)
Date: 6 Apr 2005 00:46:18 -0700
Subject: A ClientForm Question
In-Reply-To: <87d5ta6w7v.fsf@pobox.com>
References: <1112351784.512279.198080@z14g2000cwz.googlegroups.com>
	<pan.2005.04.03.12.41.05.4355@f0x.it> <87d5ta6w7v.fsf@pobox.com>
Message-ID: <1112773578.561333.166300@l41g2000cwc.googlegroups.com>

John J. Lee wrote,

> See second bullet point under "Why does .click()ing on a button not
work for me?".

Thanks for you advice. However, after read through the FAQs, I have not
managed to find a solution for my problem.  I belive my button is
coupled with some Java script which mess thing up and there is no a
easy solution.  Am I right?

-
narke



From sm.synonymous at gmail.com  Thu Apr 21 01:33:55 2005
From: sm.synonymous at gmail.com (Synonymous)
Date: 20 Apr 2005 22:33:55 -0700
Subject: Pattern Matching Given # of Characters and no String Input;
	use RegularExpressions?
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
	<42623ba8$0$10322$636a15ce@news.free.fr>
	<ae0b1ff7.0504171712.731fabd3@posting.google.com>
	<426403c7$0$773$626a14ce@news.free.fr>
Message-ID: <ae0b1ff7.0504202133.749006e6@posting.google.com>

tiissa <tiissa at nonfree.fr> wrote in message news:<426403c7$0$773$626a14ce at news.free.fr>...
> Synonymous wrote:
> > tiissa <tiissa at nonfree.fr> wrote in message news:<42623ba8$0$10322$636a15ce at news.free.fr>...
> > 
> >>tiissa wrote:
> >>
> >>>If you know the number of characters to match can't you just compare 
> >>>slices?
> >>
> >>If you don't, you can still do it by hand:
> >>
> >>In [7]: def cmp(s1,s2):
> >>   ....:     diff_map=[chr(s1[i]!=s2[i]) for i in range(min(len(s1), 
> >>len(s2)))]
> >>   ....:     diff_index=''.join(diff_map).find(chr(True))
> >>   ....:     if -1==diff_index:
> >>   ....:         return min(len(s1), len(s2))
> >>   ....:     else:
> >>   ....:         return diff_index
> >>   ....:
> > 
> > I will look at that, although if i have 300 images i dont want to type
> > all the comparisons (In [9]: cmp('ccc','cccap')) by hand, it would
> > just be easier to sort them then :).
> 
> I didn't meant you had to type it by hand. I thought about writing a 
> small script (as opposed to using some in the standard tools). It might 
> look like:
> 
> In [22]: def make_group(L):
>     ....:     root,res='',[]
>     ....:     for i in range(1,len(L)):
>     ....:         if ''==root:
>     ....:             root=L[i][:cmp(L[i-1],L[i])]
>     ....:             if ''==root:
>     ....:                 res.append((L[i-1],[L[i-1]]))
>     ....:             else:
>     ....:                 res.append((root,[L[i-1],L[i]]))
>     ....:         elif len(root)==cmp(root,L[i]):
>     ....:             res[-1][1].append(L[i])
>     ....:         else:
>     ....:             root=''
>     ....:     if ''==root:
>     ....:         res.append((L[-1],[L[-1]]))
>     ....:     return res
>     ....:
> 
> In [23]: L=['cccat','cccap','cccan','dddfa','dddfg','dddfz']
> 
> In [24]: L.sort()
> 
> In [25]: make_group(L)
> Out[25]: [('ccca', ['cccan', 'cccap', 'cccat']), ('dddf', ['dddfa', 
> 'dddfg', 'dddfz'])]
> 
> 
> However I guarantee no optimality in the number of classes (but, hey, 
> that's when you don't specify the size of the prefix).
> (Actually, I guarantee nothing at all ;p)
> But in particular, you can have some file singled out:
> 
> In [26]: make_group(['cccan','cccap','cccat','cccb'])
> Out[26]: [('ccca', ['cccan', 'cccap', 'cccat']), ('cccb', ['cccb'])]
> 
> 
> It is a matter of choice: either you want to specify by hand the size of 
> the prefix and you'd rather look at itertools as pointed out by Kent, or 
> you don't and a variation with the above code might do the job.

Thank you, that is very kool I found out how to copy files finally
with shutil too, so i'm getting close to doing something.  Going to be
working on an old computer, playing with files = dangerous lol.

Thanks for your help and taking the time to post! 

Bye :o)

S M


From jstroud at mbi.ucla.edu  Wed Apr 20 14:01:27 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 20 Apr 2005 11:01:27 -0700
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <200504201050.54062.jstroud@mbi.ucla.edu>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<200504201050.54062.jstroud@mbi.ucla.edu>
Message-ID: <200504201101.27573.jstroud@mbi.ucla.edu>

I like this, it works for any integer.
>>> str="asdfjkl;"
>>> i=-400
>>> print str[:i]+str[i:]
asdfjkl;
>>> i = 65534214
>>> print str[:i]+str[i:]
asdfjkl;


Please forgive my reassigning str. I am one of those type first think later 
programmers.

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

http://www.jamesstroud.com/


From gsakkis at rutgers.edu  Tue Apr 26 18:00:59 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 26 Apr 2005 15:00:59 -0700
Subject: Komodo syntax checking for python2.4
References: <1114540510.452834.64330@f14g2000cwb.googlegroups.com>
	<mailman.2542.1114545128.1799.python-list@python.org>
Message-ID: <1114552859.482304.288180@z14g2000cwz.googlegroups.com>

"Trent Mick" wrote:

> George,
>
> My suspicion is that the difference is that you are using a Cygwin
> Python and it is using Un*x-style process return values. What do the
> following return for your Python.
>
> For me on Windows (with ActivePython 2.4):
>     >>> import os
>     >>> os.system("exit 0")
>     0
>     >>> os.system("exit 1")
>     1
>
> And on Linux:
>     >>> import os
>     >>> os.system("exit 0")
>     0
>     >>> os.system("exit 1")
>     256

Cygwin behaves exactly as Linux in this case.

> My cygwin Python is currently busted for some reason, so I can't test
it
> on my system.
>
> On Unix-y/posix-y systems the retval from a process encodes both the
> exit status and information on how the process was stopped (c.f. the
> os.WIF* methods).
>
> It would be helpful if you could log a bug for this in Komodo's bugdb
so
> we can track this and make sure it doesn't get lost:
>
>     http://bugs.activestate.com/Komodo

No problem, I'll do that.

> Cheers,
> Trent
> 
> -- 
> Trent Mick
> TrentM at ActiveState.com

Thanks,
George



From jbenson at sextans.lowell.edu  Sat Apr  2 13:31:56 2005
From: jbenson at sextans.lowell.edu (Jim Benson)
Date: Sat, 2 Apr 2005 11:31:56 -0700 (MST)
Subject: Name of IDLE on Linux
In-Reply-To: <1aB3e.2319$44.1393@newsread1.news.atl.earthlink.net>
Message-ID: <Pine.LNX.4.44.0504021130280.26843-100000@sextans.mesa.lowellnet>

On Sat, 2 Apr 2005, Edward Diener wrote:

> What is the name of the IDLE program on Linux and where is it installed 
> in a normal Linux distribution ? I have installed all the Python 2.3.5 
> RPMs on my Fedora 3 system but I have no idea where they are installed 
> or what IDLE is called. I lloked in the Python web pages to try to find 
> a list of the files in the various installations, but was unable to find 
> the information.
> 

Try idle (all lower case). 
On my RH-9 system it is in /usr/local/bin

HTH.

Jim




From gurpreet.sachdeva at gmail.com  Tue Apr 12 02:03:54 2005
From: gurpreet.sachdeva at gmail.com (Gurpreet Sachdeva)
Date: Tue, 12 Apr 2005 11:33:54 +0530
Subject: Module for handling Nested Tables in HTML
Message-ID: <a3cc95f00504112303382e60cf@mail.gmail.com>

Hi guys,

            Can anyone suggest some good tool for handling nested
tables in a HTML page... BeautifulSoup is somehow not working with
Nested Tables.

Thanks and Regards,
Garry


From rkern at ucsd.edu  Fri Apr 22 02:55:44 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 21 Apr 2005 23:55:44 -0700
Subject: regarding system function
In-Reply-To: <20050422063637.47212.qmail@web8403.mail.in.yahoo.com>
References: <20050422063637.47212.qmail@web8403.mail.in.yahoo.com>
Message-ID: <d4a6ss$c11$1@sea.gmane.org>

praba kar wrote:
> Dear All,
> 
>      In Php If I send a command to system function
> then It will return 1 on success and 0 on failure.  So
> based upon that value I can to further work.
> 
>      But In Python If I send a command to system
> function then It will return 0 only for both
> conditions(success and failure).

Are you sure about that?

In [3]:os.system('cat foo')
cat: foo: No such file or directory
Out[3]:256

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From fabio.pliger at siavr.it  Sat Apr 30 10:26:21 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Sat, 30 Apr 2005 14:26:21 GMT
Subject: date to digit
References: <mailman.57.1114858019.14961.python-list@python.org>
Message-ID: <hAMce.72852$IN.1260649@twister2.libero.it>


"Sara Khalatbari" <sarapythonlist at yahoo.com> ha scritto nel messaggio
news:mailman.57.1114858019.14961.python-list at python.org...
> Is there a program in python that inputs a date & a
> time, for example:  "2005-04-17 04:20+0000". And
> returns a digit, for example: "3501" instead?
>
> and if there is such program or built-in function, how
> can I run it inside a code?

Here you go:

>>> a = time.strptime("2005-04-17 04:20", "%Y-%m-%d %H:%M")
>>> time.mktime(a)
1113704400.0

F.P.



>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com






From bokr at oz.net  Thu Apr 28 01:07:34 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 28 Apr 2005 05:07:34 GMT
Subject: creating very small types
References: <mailman.2599.1114633031.1799.python-list@python.org>	<pan.2005.04.27.21.46.20.199466@jerf.org>
	<427012B4.7090604@gmail.com>
	<mailman.2605.1114642557.1799.python-list@python.org>
Message-ID: <42704f31.92576087@news.oz.net>

On Wed, 27 Apr 2005 15:54:54 -0700, Michael Spencer <mahs at telcopartners.com> wrote:

>andrea wrote:
>>>>I was thinking to code the huffman algorithm and trying to compress
>>>>something with it, but I've got a problem.
>>>>How can I represent for example a char with only 3 bits??
>
>>>>I had a look to the compression modules but I can't understand them much...
>...
>> I understand I can't do it easily in python, but maybe I could define a
>> new type in C and use it to do those dirty works, what do you think?
>
>Why do you need to create 'very small types'?
>
>You only need actual bit-twiddling when you do the encoding/de-coding right?
>If you create an encoding map 'codes' as a dict of strings of '1' and '0', 
>encoding might look like (untested):
>
>
>     def encode(stream):
>         outchar = count = 0
>         for char in stream:
>             for bit in codes[char]:
>                 (outchar << 1) | (bit == "1")
>                 count +=1
>                 if count ==8:
>                     yield chr(outchar)
>                     outchar = count = 0
>         if count:
              outchar <<= 8-count  # make last bit field big-endian like others?
>             yield chr(outchar)
>
>
I think I prefer little-endian bit streams though, e.g. (just hacked, not tested beyond
what you see and not recommended as efficient either way, esp the decode, but it might
be illustrative of something for Andrea ;-)

----< trivcodec.py >------------------------------------------------
#trivcodec.py
def encode(stream):
    outchar = count = 0
    for char in stream:
        #print '%r code: %r'%(char, codes[char])
        bits, width = codes[char]
        outchar |= (bits<<count)
        count += width
        while count >= 8:
            yield chr(outchar%0xff)
            outchar >>= 8
            count -= 8
    if count:
        yield chr(outchar)

def decode(stream):
    codebuf = count = 0
    width = 1
    for codebyte in stream:
        codebyte = ord(codebyte)
        codebuf |= (codebyte<<count)
        count += 8
        if width>count:
            continue
        while width <= count:
            code = (codebuf&((1<<width)-1), width)
            if code not in chars:
                width += 1
                continue
            yield chars[code]
            codebuf >>= width
            count -= width
            width = 1
        width = 1 

#trivial encoding dict: a=0 b=01 C=0011 D=0111 E=1011 F=1111
codes = {'a':(0x00,1), 'b':(0x01,2), 
         'C':(0x3+0x4*0,4), 'D':(0x3+0x4*1,4),
         'E':(0x3+0x4*2,4), 'F':(0x3+0x4*3,4)}
chars = dict([(v,k) for k,v in codes.items()]) # reverse

def test(*tests):
    if not tests: tests = ['abaFECbaabbDF']
    for charstream in tests:
        print
        codestream = ''.join(list(encode(charstream)))
        print '%r [%s] -(encode)-> %r [%s]' % (
            charstream, len(charstream), codestream, len(codestream))
        recovered = ''.join(list(decode(codestream)))
        print '%r [%s] -(decode)-> %r [%s]' % (
            codestream, len(codestream), charstream, len(charstream))
     
if __name__ == '__main__':
    import sys
    test(*sys.argv[1:])
--------------------------------------------------------------------

Result:

[22:02] C:\pywk\clp>py24 trivcodec.py

'abaFECbaabbDF' [13] -(encode)-> '\xf2;Q\xf7' [4]
'\xf2;Q\xf7' [4] -(decode)-> 'abaFECbaabbDF' [13]

[22:02] C:\pywk\clp>py24 trivcodec.py  a b C D E F

'a' [1] -(encode)-> '\x00' [1]
'\x00' [1] -(decode)-> 'a' [1]

'b' [1] -(encode)-> '\x01' [1]
'\x01' [1] -(decode)-> 'b' [1]

'C' [1] -(encode)-> '\x03' [1]
'\x03' [1] -(decode)-> 'C' [1]

'D' [1] -(encode)-> '\x07' [1]
'\x07' [1] -(decode)-> 'D' [1]

'E' [1] -(encode)-> '\x0b' [1]
'\x0b' [1] -(decode)-> 'E' [1]

'F' [1] -(encode)-> '\x0f' [1]
'\x0f' [1] -(decode)-> 'F' [1]

[22:02] C:\pywk\clp>py24 trivcodec.py

'abaFECbaabbDF' [13] -(encode)-> '\xf2;Q\xf7' [4]
'\xf2;Q\xf7' [4] -(decode)-> 'abaFECbaabbDF' [13]

[22:02] C:\pywk\clp>py24 trivcodec.py  aaaaaaaa bbbb CC DD EE FF

'aaaaaaaa' [8] -(encode)-> '\x00' [1]
'\x00' [1] -(decode)-> 'aaaaaaaa' [8]

'bbbb' [4] -(encode)-> 'U' [1]
'U' [1] -(decode)-> 'bbbb' [4]

'CC' [2] -(encode)-> '3' [1]
'3' [1] -(decode)-> 'CC' [2]

'DD' [2] -(encode)-> 'w' [1]
'w' [1] -(decode)-> 'DD' [2]

'EE' [2] -(encode)-> '\xbb' [1]
'\xbb' [1] -(decode)-> 'EE' [2]

'FF' [2] -(encode)-> '\x00' [1]
'\x00' [1] -(decode)-> 'FF' [2]

[22:03] C:\pywk\clp>py24 trivcodec.py  aaaaaaaabbbbCCDDEEFF

'aaaaaaaabbbbCCDDEEFF' [20] -(encode)-> '\x00U3w\xbb\x00' [6]
'\x00U3w\xbb\x00' [6] -(decode)-> 'aaaaaaaabbbbCCDDEEFF' [20]


Regards,
Bengt Richter


From bokr at oz.net  Fri Apr  8 13:16:34 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 08 Apr 2005 17:16:34 GMT
Subject: curious problem with large numbers
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>
	<mailman.1517.1112938969.1799.python-list@python.org>
	<4256a676@nntp0.pdx.net>
Message-ID: <4256b80b.34130777@news.oz.net>

On Fri, 08 Apr 2005 09:05:39 -0700, Scott David Daniels <Scott.Daniels at Acm.Org> wrote:

>Steve Holden wrote:
>> Scott David Daniels wrote:
>> 
>>> Terry Reedy wrote:
>>>
>>>> On my Windows machine with 2.2.1, I get exactly what you expected:
>>>>
>>>>>>> 1e10000
>>>>
>>>> 1.#INF
>>>> ...
>>>> If you get wrong behavior on a later version, then a bug has been 
>>>> introduced somewhere, even perhaps in VC 7, used for 2.4.
>>>
>>> Nope, it is also there for 2.3.4 (May 25 2004, 21:17:02)....
>> 
>> A further Windows data point from Cygwin:
>> 
>> Python 2.4 (#1, Dec  4 2004, 20:10:33)
>> [GCC 3.3.3 (cygwin special)] on cygwin
>> Type "help", "copyright", "credits" or "license" for more information.
>>  >>> 1e10000
>> Inf
>>  >>>
>> 
>> regards
>>  Steve
>
>Aha! Same version (2.3.4):
>
>Idle:
>     >>> 1e10000
>     1.0
>     >>> import struct; struct.pack('d', 1e10000)
>     '\x00\x00\x00\x00\x00\x00\xf0?'
>(which is actually 1.0)
>
>python via command line (readline support):
>     >>> 1e10000
>     1.#INF
>     >>> import struct; struct.pack('d', 1e10000)
>     '\x00\x00\x00\x00\x00\x00\xf0\x7f'
>
>Note the difference in the final byte.  Same results (command
>line vs. Idle) for 2.4.1.
>
Good aha, but ISTM one of them is more missing than different ;-)
(I.e., returned packed string is length 7 vs 8)

Regards,
Bengt Richter


From ctan at synopsys.com  Wed Apr 20 15:07:46 2005
From: ctan at synopsys.com (chong tan)
Date: Wed, 20 Apr 2005 12:07:46 -0700
Subject: freeze question..
Message-ID: <116da42s33dria9@corp.supernews.com>

I have the code that import the xml dom module:

import xml.dom.minido

that works OK.  But the freeze version keeps getting me this error:

ImportError: No module named dom

I run freeze this way:

freeze -q -E my.py



any idea and suggestion ?
thanks

tan




From foo.bar at freesurf.ch.invalid  Sat Apr 16 15:54:46 2005
From: foo.bar at freesurf.ch.invalid (Thomas Rast)
Date: Sat, 16 Apr 2005 21:54:46 +0200
Subject: pydoc preference for triple double over triple single quotes --
 any reason?
References: <mailman.2008.1113679688.1799.python-list@python.org>
Message-ID: <8764ymebuh.fsf@thomas.local>

Brian van den Broek <bvande at po-box.mcgill.ca> writes:

> It turns out that I was using '''triple single quotes''' and pydoc
> only pulls a description out from module docstrings that are formatted
> in """triple double quotes""". I've poked about with google, and
> cannot find any explanation of why pydoc should treat the two cases
> differently. Anyone have an idea?

Maybe because some editors, e.g. Emacs, do not (cannot) properly
handle triple quotes in syntax analysis and highlighting.  Instead,
the quotes are treated as ordinary quotes, which breaks

  '''This doesn't work'''

but not

  """This'll work"""

due to the apostrophe.  pydoc then probably decided to follow PEP 257
which says

  For consistency, always use """triple double quotes""" around
  docstrings.
  [http://www.python.org/peps/pep-0257.html]

- Thomas

-- 
If you want to reply by mail, substitute my first and last name for
'foo' and 'bar', respectively, and remove '.invalid'.


From chris.h.devries at gmail.com  Fri Apr 22 14:45:06 2005
From: chris.h.devries at gmail.com (Christopher De Vries)
Date: 22 Apr 2005 11:45:06 -0700
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
Message-ID: <1114195506.747672.266890@o13g2000cwo.googlegroups.com>

I have recently been using gtk+2 and glade2. I love glade because it
allows me to visually design my interface and then use my favorite
editor to code up all the callbacks. Best of all the UI is stored as an
xml file you just load from your python program.

For a good introduction, take a look at this article from Linux
Journal:
http://www.linuxjournal.com/article/6586

Chris



From bokr at oz.net  Mon Apr 11 18:45:30 2005
From: bokr at oz.net (Bengt Richter)
Date: Mon, 11 Apr 2005 22:45:30 GMT
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<4259c2ed.60213392@news.oz.net>
	<mailman.1681.1113224751.1799.python-list@python.org>
Message-ID: <425afd4e.140694197@news.oz.net>

On Mon, 11 Apr 2005 10:05:49 -0300, "Gabriel B." <gabriel.barros at gmail.com> wrote:

>On Apr 10, 2005 11:08 PM, Bengt Richter <bokr at oz.net> wrote:
>> On Sat, 9 Apr 2005 19:22:16 +0200, "Fredrik Lundh" <fredrik at pythonware.com> wrote:
>>     open('mywidget_v2.txt','w').write(repr(mywidget.textview)
>
>How about a pickle hook?
>
>You'd just unpack the pickle data, and end up with a pointer to a
>frame(?) containing all the goods, then just .pack() it into whatever
>you want.

Pickle is one way to store a representation of something, but it isn't
programming-language-agnostic ;-)

Regards,
Bengt Richter


From postmaster at castleamber.com  Sun Apr 24 20:23:54 2005
From: postmaster at castleamber.com (John Bokma)
Date: 25 Apr 2005 00:23:54 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
Message-ID: <Xns9642C549BBBEFcastleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <postmaster at castleamber.com> writes:
> 
>> Mike Meyer wrote:
>>> John Bokma <postmaster at castleamber.com> writes:
>>>> Mike Meyer wrote:
>>>>> Depends on the problem. If it's one of the things for which Python
>>>>> has an obvious solution (sort a list; split a string on
>>>>> whitespace; pull select list elements based on a criteria of some
>>>>> kind; search a file for lines with a given word in them; etc.)
>>>>> you'd get back the same answer from almost all of them.
>>>> And what makes you doubt it would be different with Perl? :-D
>>> Perl's "There's more than one way to do it" attitude.
>> There's doesn't mean that you have to use or know them all. I think 
>> every language here and there more ways to do something. And at a 
>> broader scope, e.g. a simple algorithm, it doesn't matter that much 
>> anymore.
> 
> Except that, as I said elsewhere, that having more than one way to do
> it bloats the language processor

do you really think that for / foreach and things like if / unless bloat 
a language processor? I think you take your "pure programming lanuage" 
way to far, and really don't understand your choice of Python in your 
crusade.

> and increases the semantic load on
> the programmer. The best the programmer can do, as you imply, is to
> ignore the extraneous methods.

I am curious of a list of extraneous methods in Perl (more about the 
size by the way)

> Then the poor programmer has to puzzle
> over them every time they show up in someone else's code.

A poorly skilled programmer has to puzzle about a lot of more things. Or 
you think list comprehension (sp?) and all the tricks with it are clear? 
or the and or trick? I just had a glance on Python, but what probably to 
you is one clear path isn't clear to me yet. And I doubt that can all be 
blamed on unpure new Python.

>>> You also chose the wrong way to do things globally, by leaving off
>>> the optional parens on the function invocations. That makes the list
>>> a PITA to parse,
> 
>> First of all, who cares? Not the programmer.
> 
> Of course the programmer doesn't care. They jyust have to deal with it
> for the rather short development period. The *maintainer* cares,
> though - as they have to deal with it for the life of the program.

You keep confusing me: are you talking about the programmer who designs 
/ maintains the parser? I guess yes. I talk about the programmers who 
use the language. 

>> But I doubt if you are  correct; why is 
>> OP PARAMETER, LIST
>> a PITA to parse, and
>> OP( PARAMETER, LIST )
>> not? I would even say that the former is easier to parse, since there
>> is no need for checking the ( and ) (and matching them).
> 
> Look at the *context*. You wrote
> 
> word word, word word, word, word word, word, word.

Yes, since it where several examples on one line. You gave several 
problems. The etc. was a kind of give away.

>>> N.B.: split(' ', $astring) is wrong as well. In this case, Perl
>>> doesn't provide the right tool for the job; you have to build it
>>> from parts.
>> You either misread your own problem specifications, or you should
>> read perldoc -f split (near the end, it starts with "As a special
>> case," ) 
> 
> No, I missed the wart hiding under the "special case". How, pray tell,
> do you do the equivalent of Python's string.split(' ') in Perl?

split /PATTERN/,EXPR (from perldoc -f split), so:
      ^^^^^^^^^

split / /, $string

> No, one I blew. One you still got wrong.

Which one?

>> Same could be said of floating point numbers, or complex numbers, or 
>> lists, dictionaries, etc. etc.
> 
> Right. And for each of those, there are languages that don't have them
> as a built in type.

True, perl has no built in complex numbers.

>> If I could have a peek at the Perl code you maintained I could tell
>> you (often by just seeing 3-5 lines) the status of the programmer who
>> wrote it :-)
> 
> So you'd either say you were wrong, or that my second contention was
> right. Either one would be a bad side effect of TMTOWTDI.

I am right, and you are wrong ;-)

>> Quite some people have been "tweaking" CGI scripts
>> Quite some people "know" PHP, and hence consider themselves Perl 
>> programmers.
> 
> Quite right. Neither is in the set of Perl things I maintain.

Does that matter? What matters is what are the skills and background of 
the Perl programmer who wrote the code you maintain.

>>> part of the grammar of the language, and are a recent addition. It's
>>> not clear how Python should evolve with them added to the language.
>> More fat: so I would say: learn to live with it. I only see
>> advantages. If you want a minimal set of operations, I recommend
>> programming ARM assembly, and don't go beyond ARM3 :-D.
> 
> You could also say more bloat. It's not a good thing. I don't want a
> minimal set of operations; I want an orthogonal 1-1 coverage of
> operations.

ARM assembly, told you ;-)

> That's will account for the least bloat in the processor,
> the least load on the programmer, and the least bad code.

ARM, maybe even ARM2. And the last thing depends on you.

>> seconds. Moreover, garbage collection gives newbies the impression
>> that everything is handled automatically, and hence, they forget that
>> other resources are less unforgiven, and *have to be* released.
> 
> Other resources are less forgivving only if they are badly
> designed.

Sure, a resource outside of your program that has certain limits is 
badly designed. Yup, a database for example.

> That means they *should* be released, but not *have to be*
> released.

Trust me: they *have to be* released.

> Consider the file type in Python. It'll be closed after
> you're through with it, guaranteed. However, garbage collection isn't
> triggered by running out of file descriptors, so you *should* close
> them.

Or otherwise?

>> A beginner will find a way. A nice example is garbage collection, 
>> beginners think they don't have to think. And then suddenly things
>> pop up like: memory leaking, how are circular references handled, and
>> oops, suddenly things like weak references are needed. Add, things
>> like threading, and shared resources, resources that are limited in
>> one way or another and I doubt programming has become easier, or less
>> error prone.
> 
> Having dealt with memory leaks in C (and other such languages) for a
> decade, I'd say programming is *much* easier than it would be if you
> didn't have some form of garbage collection.

Easier, sure. But does it turn beginners in rock solid programmers?

>> Has anyone ever did serious research to the number of bugs per 10k
>> lines for several programming languages?
> 
> Yeah. The LISP community did some research on garbage collection
> vs. explicit allocate/free a couple of decades ago. The explicit
> allocate/free methodology was found to be noticably more bug
> prone. Like I said, those date from a couple of decades ago, so I've
> lost the reference and google didn't turn anything up.

So they looked close at one aspect of the language. But you think that 
10k lines of, say Java, has less bugs then 10k lines of C?

>> I remember to have read that air bags makes people drive more
>> reckless. I am quite convinced the same holds for programming
>> languages. A language can't cover your behind, so to speak.
> 
> Could you provide examples of what kind of behavior you're talking
> about? What would be the analog of "driving more reckless" given that
> I've got a garbage collector?

I already gave that one: forgetting to release resources which are not 
unlimited.

> Of course, if you really believe that all the protections are a waste
> of language spec, you should be writing assembler.

Since programming languages have several more advantages then 
"protecting" and "guiding" and "limiting" programmers, why? 

>> potential bugs is often equal to something people *think* a beginner
>> is going to make.
> 
> Yes, but potential bugs even more often turn up in *real*
> programs. I've fixed enough bogus pointer/using free'd memory/memory
> leaks in C to know that.

And I am sure that you fixed enough bugs in the same *real* programs 
that were in no way related to this. I have fixed enough bugs in Perl, 
Java, etc, to know that "life will find a way", so to speak.

>> and if they are not hermits, they choose the ones they see the most 
>> often used (unless it's Perl golf).
> 
> Which means they adopt to their subset of the community. Which means
> that supporting code from another community will in practice require
> learning a new programming language that happens to have a syntax they
> are familiar with.

What makes you think there are isolated communities?

>> blocks. Perl is like legos. What you want sounds a lot like legos
>> that can instead of round thingies to connect them uses triangles, so
>> there is only one way to stack them. Oh, and you want them dull grey.
> 
> Nope, I make heavy use of libraries. The Python standard library isn't
> exemplary, and it some cases provides overlapping functionality.

I haven't seen a library that doesn't :-D

> But
> it does try to avoid that. It also tries to come with "batteries
> included". You can get an aweful lot done in Python without ever going
> to third party libraries. With Perl, you wind up going to CPAN for a
> lot of things - which puts you back into TMTOWTDI land.

How long haven't you been in touch with Perl? 

> I want programming to be the professors route. I don't want to worry
> about which for loop to use - I want there to be just one for loop, so
> I take that one and *get on with solving the problem*. Having multiple
> for loops (or other TMTOWTDI things) bloats the language
> processor/library and increases the load on the programmer to no
> benefit.

I use either for or while. 

> True. The WWW was extant when I learned Python, so I could learn it by
> reading the documention on the web site, and looking through the
> library. Perl, on the other hand, I had to learn from the
> documentation that shipped with it, and the library that shipped with
> it. Come to think of it, Python has a larger library than Perl as
> well.

How did you measure this? And which distribution of Perl are you talking 
about?

>> Yes, most languages make it clumsy and frustrating. Perl is a rare 
>> exception.
> 
> Right - Perl makes writing ugly,

Nope, the programmer does that.

> slow code easy. Python makes it
> hard. I think this makes python the superior language.

And I think that there is the main problem in your whole story. You 
think this is a quest for superiority. It isn't.

>> what everything means and does by trial and error. As I already
>> wrote: the more than one way is more often the *combination* of well
>> known building blocks.
> 
> Now you're trying to change the story. But I know better. Perl
> provides multiple ways to do things at the syntactic level, and that's
> the root of the problem. There are two iterative loops.

for and foreach? 

> There are two conditional loops.

while and do while?

> There are two conditional execution statements, not

if and unless?

> counting the variants that conditionalize the execution of a single
> statement.

? :, and and or

( hmmm, and or trick ;-) )

> There are two different syntaxes for invoking builtin
> functions (though I don't think one of them works on user-defined
> functions; never tried it).

Uhm, you mean with and without () ? Yes, you can do that with user-
defined functions.

But if this all bothers you *this* much, I am afraid that the problem is 
really behind the keyboard :-)

>> But who writes this code? The language, or the programmer? A
>> programmer who writes ugly Perl code is suddenly going to be a
>> skilled Python programmer? Are you serious?
> 
> No, he's not going to be a skilled Python programmer. But you avoiding
> ugly code in Python doesn't take a skilled programmer.

Funny, I saw recently something I consider ugly code, written by someone 
I thought was a skilled programmer.

>>> After all, "You can write FORTRAN in any
>>> language(*)". If I have to maintain the code, I'd *much* prefer that
>>> the language make it hard to write ugly code, as I'm that much less
>>> likely to get ugly code to maintain.
>> Nonsense.
> 
> I make that claim based on experiene maintaing both Perl and Python
> code. What basis do you have for calling it nonsense.

If you are talking about maintaining your own code, maybe you are right. 
But I claim that it's nonense that code written by other people, with 
clearly different programming skills compared to the maintainer are a 
PITA, no matter what language is used.

>>> TMTOWTDI makes it easy to write
>>> ugly code. TOOWTDI makes it hard to write ugly code.
>> And the funny thing is: it shouldn't matter to a skilled programmer.
>> And an unskilled programmer will make up for the TOOWTDI restriction
>> in more ways than you and I can imagine.
> 
> I don't agree. It doesn't say "There's one obvious to the skilled
> programmer way to do it." It says "There's one obvious way to do it."

Yup, to pick a tool out of a organized toolbox. Which is fine if that's 
the only job involved. Programming, or as I see it, is not about picking 
tools out of a box, but combining them.

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


From m_tach at yahoo.com  Tue Apr 12 14:16:22 2005
From: m_tach at yahoo.com (m_tach at yahoo.com)
Date: Tue, 12 Apr 2005 20:16:22 +0200
Subject: ATTN : Georges ( gry@ll.mit.edu)
Message-ID: <d5178$425c1076$43461874$1508@nf1.news-service.com>

First of all thanks for helping me out.

I have to admit I dont understand some of your suggestiosn, sorry.
I dont know what is the "3D" thing... Is there another way to make it
work something more simple for a newbie like me? Thanks

What I want to do is:
First check all the files from a folder and analyze only the one with the .Seq extension.
What I want to do is to get the reverse complement of the DNA sequence. If their is a problem
with some characters in the DNA Sequence I want the function to tell it to me.

Here are the comp and iupac:

iupac ="GgAaTtCcRrYyMmKkSsWwHhBbVvDdNn"

comp={"A":"T", "T":"A", "G":"C", "C":"G", "R":"Y", "Y":"R", "M":"K",
"K":"M", "S":"W", "W":"S", "B":"V", "V":"B", "D":"H", "H":"D", "r":"y",
"y":"r", "m":"k", "k":"m", "s":"w", "w":"s", "b":"v", "v":"b", "d":"h",
"h":"d", "a":"t", "t":"a", "g":"c", "c":"g", "N":"N","n":"n"}

So if a $ or Z appears in the DNA sequence, I want to know it. 

My code so far:
# -*- coding: iso-8859-1 -*-
import sys
import os
from progadn import *

ab1seq = raw_input("Entrez le r?pertoire o? sont les fichiers ? analyser: ") or None
if ab1seq == None :
    print "Erreur: Pas de r?pertoire! \n" \
"\nAu revoir \n"
    sys.exit()

listrep = os.listdir(ab1seq)
#print listrep

extseq=[]

for f in listrep:
     if f[-4:]==".Seq":
         extseq.append(f)
         #print extseq

for x in extseq:
     f=open(x, "r")
     seq=f.read()
     f.close()
     #s=seq


def checkDNA(seq):
    """Retourne une liste des caract?res non conformes ? l'IUPAC."""

    junk=[]
    for c in range (len(seq)):
        if seq[c] not in iupac:
            junk.append([seq[c],c])
            #print junk
            print "ATTN: Il y a le caract?re %s en position %s " % (seq[c],c)
        if junk == []:
             indinv=range(len(seq))
             indinv.reverse()
             resultat=""
             for i in indinv:
                 resultat +=comp[seq[i]]
             return resultat

seq=checkDNA(seq)

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

Path: news3!feeder.news-service.com!news.glorb.com!postnews.google.com!o13g2000cwo.googlegroups.com!not-for-mail
From: gry at ll.mit.edu
Newsgroups: comp.lang.python
Subject: Re: problem with the logic of read files
Date: 12 Apr 2005 10:47:17 -0700
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Xref: news-x2.support.nl comp.lang.python:438583


<m_t... at yahoo.com> wrote:
> I am new to python and I am not in computer science. In fact I am a
biologist and I ma trying to learn python. So if someone can help me, I
will appreciate it.
> Thanks
>
>
> #!/cbi/prg/python/current/bin/python
> # -*- coding: iso-8859-1 -*-
> import sys
> import os
> from progadn import *
>
> ab1seq =3D raw_input("Entrez le r=E9pertoire o=F9 sont les fichiers =E0
analyser: ") or None
> if ab1seq =3D=3D None :
>     print "Erreur: Pas de r=E9pertoire! \n"
> "\nAu revoir \n"
>     sys.exit()
>
> listrep =3D os.listdir(ab1seq)
> #print listrep
>
> extseq=3D[]
>
> for f in listrep:
###### Minor -- this is better said as:  if f.endswith(".Seq"):
>      if f[-4:]=3D=3D".Seq":
>          extseq.append(f)
> #         print extseq
>
> for x in extseq:
>      f =3D open(x, "r")
###### seq=3D... discards previous data and refers only to that just
read.
###### It would be simplest to process each file as it is read:
@@@@@@ seq=3Df.read()
@@@@@@ checkDNA(seq)
>      seq=3Df.read()
>      f.close()
>      s=3Dseq
>
> def checkDNA(seq):
>     """Retourne une liste des caract=E8res non conformes =E0
l'IUPAC."""
>
>     junk=3D[]
>     for c in range (len(seq)):
>         if seq[c] not in iupac:
>             junk.append([seq[c],c])
>             #print junk
>             print "ATTN: Il y a le caract=E8re %s en position %s " %
(seq[c],c)
>         if junk =3D=3D []:
>              indinv=3Drange(len(seq))
>              indinv.reverse()
>              resultat=3D""
>              for i in indinv:
>                  resultat +=3Dcomp[seq[i]]
>              return resultat
>
> seq=3DcheckDNA(seq)
> print seq

##### The program segment you posted did not define "comp" or "iupac",
##### so it's a little hard to guess how it's supposed to work.  It
would
##### be helpful if you gave a concise description of what you want the

##### program to do, as well as brief sample of input data.
##### I hope this helps!  -- George
>
> #I got the following ( as you see only one file is proceed by the
function even if more files is in extseq
>
> ['B1-11_win3F_B04_04.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq',
'B1-19_win3F_F04_12.ab1.Seq']
> ..
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq',
'B1-19_win3F_F04_12.ab1.Seq', 'B1-19_win3R_G04_14.ab1.Seq',
'B90_win3F_H04_16.ab1.Seq', 'B90_win3R_A05_01.ab1.Seq',
'DL2-11_win3F_H03_15.ab1.Seq', 'DL2-11_win3R_A04_02.ab1.Seq',
'DL2-12_win3F_F03_11.ab1.Seq', 'DL2-12_win3R_G03_13.ab1.Seq',
'M7757_win3F_B05_03.ab1.Seq', 'M7757_win3R_C05_05.ab1.Seq',
'M7759_win3F_D05_07.ab1.Seq', 'M7759_win3R_E05_09.ab1.Seq',
'TCR700-114_win3F_H05_15.ab1.Seq', 'TCR700-114_win3R_A06_02.ab1.Seq',
'TRC666-100_win3F_F05_11.ab1.Seq', 'TRC666-100_win3R_G05_13.ab1.Seq']
>
> after this listing my programs proceed only the last element of this
listing (TRC666-100_win3R_G05_13.ab1.Seq)
>
>
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTCCCGAAGTGTCCCAGAGCAAATAAATGGACCAAAACGTTTTTAG=
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTCCCGAAGTGTCCCAGAGCAAATAAATGGACCAAAACGTTTTTAG=
AATACTTGAACGTGTAATCTCATTTTAA



**********End Of Post*************






From joal at bigpond.net.au  Fri Apr  1 22:56:34 2005
From: joal at bigpond.net.au (Joal Heagney)
Date: Sat, 02 Apr 2005 03:56:34 GMT
Subject: New to programming question
In-Reply-To: <mailman.1218.1112400551.1799.python-list@python.org>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>	<0_63e.19914$C7.11056@news-server.bigpond.net.au>	<B%63e.19916$C7.1024@news-server.bigpond.net.au>	<424d1573.11134991@news.oz.net>	<iJc3e.20399$C7.2091@news-server.bigpond.net.au>
	<mailman.1218.1112400551.1799.python-list@python.org>
Message-ID: <SJo3e.20868$C7.13157@news-server.bigpond.net.au>

Steve Holden wrote:
> Joal Heagney wrote:
> 
>> Bengt Richter wrote:
>>
>>> On Fri, 01 Apr 2005 07:46:41 GMT, Joal Heagney <joal at bigpond.net.au> 
>>> wrote:
>>>
>>>
>>>> Oh goddammmnitttt. I seem to be doing this a lot today. Look below 
>>>> for the extra addition to the code I posted.
>>>>
>>>> Joal Heagney wrote:
>>>>
>>>>> Here's my contribution anycase:
>>>>>
>>>>> count = 0
>>>>> # Get first input
>>>>> name = raw_input("Guess my name: ")
>>>>> # Give the sucker two extra goes
>>>>> while count < 2:
>>>>>    # Check the value of name
>>>>>    if name == 'Ben':
>>>>>        print "You're right!"
>>>>>        break
>>>>>    else:
>>>>>        name = raw_input("Try again: ")
>>>>
>>>>
>>>>
>>>>       # Here's the bit I missed out.
>>>>       count += 1
>>>>
>>>>> # Of course, we haven't checked the sucker's last guess
>>>>> # so we have to do that now.
>>>>> if count == 2:
>>>>>    if name == 'Ben':
>>>>>        print "You're right!"
>>>>>    else:
>>>>>        print "No more tries for you!!!"
>>>>>
>>>>>
>>>>> Hope this helps.
>>>>> Joal
>>>>
>>>>
>>>>
>>>> GRRRRRRRR.
>>>>
>>>
>>>
>>> Need something more straightforward, e.g., a wrapped one-liner:
>>>
>>>  >>> def guess(n=3): print ("You're right!", 'No more tries for 
>>> you!!!')[n-1 in
>>>  ...    (x for x in xrange(n) for t in [raw_input('Guess my name: 
>>> ')=='Ben']
>>>  ...    if not t or iter([]).next())]
>>
>>
>>
>> Okay, now in my opinion, that's just too complex to give to a newbie 
>> as a suggested implementation. :)
>>
>> Joal
> 
> 
> I suppose this would be far too easy to understand, then:
> 
> pr =['Guess my name', 'Wrong, try again', 'Last chance']
> for p in pr:
>   name = raw_input(p+": ")
>   if name == "Ben":
>     print "You're right!"
>     break
> else:
>   print "Loser: no more tries for you"
> 
> regards
>  Steve

THIS is why I like python! There's always a simple, easy to understand 
way to do something. If it looks complex, then there must me something 
wrong.

Joal


From apardon at forel.vub.ac.be  Fri Apr 22 02:47:38 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 22 Apr 2005 06:47:38 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>
	<1114109221.149346.64850@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd6h7ga.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-21, Dan Bishop schreef <danb_83 at yahoo.com>:
> Antoon Pardon wrote:
>> Op 2005-04-21, Steve Holden schreef <steve at holdenweb.com>:
>> > beliavsky at aol.com wrote:
> ...
>> >> Along the same lines, I think the REQUIREMENT that x[0] rather
> than
>> >> x[1] be the first element of list x is a mistake. At least the
>> >> programmer should have a choice, as in Fortran or VBA. In C
> starting at
>> >> 0 may be justified because of the connection between array
> subscripting
>> >> and pointer arithmetic, but Python is a higher-level language
> where
>> >> such considerations are less relevant.
>> >>
>> > But Pythonicity required that there should be one obvious way to do
>
>> > something. How obvious is having two ways?
>>
>> How obvious is that lists can be any length? Do you consider it
>> an unbounded number of ways, that lists can be any length?
>>
>> Like users have a choice in how long they make a list, they
>> should have a choice where the indexes start. (And that
>> shouldn't be limited to 0 and 1).
>
> Suppose you could.  Then what should
>
> ([3, 1, 4] indexbase 0) + ([1, 5, 9] indexbase 4)
>
> equal?

There are multiple possibilities, that can make sense.
I'm sure that no consensus will be reached about what
is should be. This will stop this idea from ever being
implemented. So you shouldn't worry too much about it :-).

>> That you are forced to use zero-based structures, while the
>> problem space you are working on uses one-based structures
>> is a far bigger stumbling block where you continually have
>> to be aware that the indexes in your program are one off
>> from the indexes the problem is expressed in.
>
> Name a problem space that inherently requires arrays to be 1-based
> rather than 0-based.

None, but that is beside the question. If I look into my mathematics
books plenty of problems are described in terms of one based indexes
Sure most of them could just as easily be described in terms of
zero-based indexes, but the fact of the matter is they are not.

The same goes for problems other people would like me to solve.
Often enough they describe their problems in term of 1-based
indexes rather than 0-based. Sure I can translate it to 0-based,
but that will just make communication between me and the client
more difficult.

-- 
Antoon Pardon


From kasimov at i.com.ua  Wed Apr 27 03:04:26 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Wed, 27 Apr 2005 10:04:26 +0300
Subject: python equivalent of php implode
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<kvo3k2-s9c.ln1@pluto.i.infosense.no>
Message-ID: <d4ndnh$2suc$1@news.tsystems.kiev.ua>

... but not in the case when integers are in a dictionary (please, try to
execute your example by yourself first)


"Ola Natvig" <ola.natvig at infosense.no> wrote:
news:kvo3k2-s9c.ln1 at pluto.i.infosense.no...
> Maksim Kasimov wrote:
> >
> >   in php-scripts, to insert data to database, i'm doing like this:
> >
> >   ...
> >   $query_param = array(
> >     'field0' => 1,
> >     'field1' => 3,
> >     'field2' => $var2,
> >     'field3' => $var3,
> >   );
> >   ...
> >
> >   $sql = "INSERT INTO $table (".implode(", ",
> > array_keys($query_param)).") VALUES ('".implode("','",
$query_param)."')";
> >
> >   how it can be done, using python (elegantly, without cycles)?
> >
> >
>
> sql = "INSERT INTO %s (%s) VALUES (%s)" % (table, ','.params.keys()),
> ','.join(param.values()))
>
> should do the trick.
>
>
> --
> --------------------------------------
>   Ola Natvig <ola.natvig at infosense.no>
>   infoSense AS / development




From Scott.Daniels at Acm.Org  Fri Apr  1 11:48:31 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 01 Apr 2005 08:48:31 -0800
Subject: __init__ method and raising exceptions
In-Reply-To: <Pine.GSO.4.44.0503312343170.26126-100000@epic19.Stanford.EDU>
References: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
	<Pine.GSO.4.44.0503312343170.26126-100000@epic19.Stanford.EDU>
Message-ID: <424d7635$1@nntp0.pdx.net>

Vikram wrote:
>>I can't use 'break' or 'continue' in a class method, nor can I return a
>>boolean value from __init__() to check for errors within the for-loop.
>>How would I be able to stop the current iteration and continue with the
>>next after reporting an error?
> 
> 
> maybe i don't fully understand your qn but why don't you let __init__ of
> your class raise an exception and then catch it in the outer for loop and
> continue. something like:
> 
> for i in ...
>   try:
>     foo()
>   except:
     except (ValueError, TypeError), error:
>     continue

Use something like the above, (always expect certain kinds of errors)
lest you accidentally capture an real attempt to stop the program
such as the exception a Control-C causes.

-Scott David Daniels
Scott.Daniels at Acm.Org


From behnel_ml at gkec.informatik.tu-darmstadt.de  Tue Apr 19 14:31:46 2005
From: behnel_ml at gkec.informatik.tu-darmstadt.de (Stefan Behnel)
Date: Tue, 19 Apr 2005 20:31:46 +0200
Subject: XML-RPC -- send file
In-Reply-To: <1113933767.439552.169130@g14g2000cwa.googlegroups.com>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
	<1113930209.259905.112850@o13g2000cwo.googlegroups.com>
	<mailman.2122.1113933410.1799.python-list@python.org>
	<1113933767.439552.169130@g14g2000cwa.googlegroups.com>
Message-ID: <d43in3$438$1@lnx107.hrz.tu-darmstadt.de>


codecraig schrieb:
> CLIENT
> -----------
> d = xmlrpclib.Binary(open("C:\\somefile.exe").read())
> server.sendFile(d)
> 
> SERVER
> --------------
> def sendFile(tmp):
>     print "FILE:", tmp

This returns None. Don't know what XML-RPC expects, but you may either try 
to return something else from the function or make XML-RPC return nothing 
(don't know if that works).

> xmlrpclib.Fault: <Fault 1: 'exceptions.TypeError:cannot marshal None
> unless allow_none is enabled'>

The obvious error. :)

Stefan


From xah at xahlee.org  Mon Apr 25 21:12:58 2005
From: xah at xahlee.org (Xah Lee)
Date: 25 Apr 2005 18:12:58 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <mailman.2485.1114456610.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
	<d4jec2$20g$1@sea.gmane.org>
	<mailman.2485.1114456610.1799.python-list@python.org>
Message-ID: <1114477978.067147.293900@z14g2000cwz.googlegroups.com>

Dear Steve Holden,

the rewrite of the regex doc is instigated by your offer.

it is published and announced here on April 18th. If you deem it
proper, paypal me. It will be to your credit and easier to incorporate
into the main doc.

 Xah
 xah at xahlee.org
? http://xahlee.org/



From me at privacy.net  Sun Apr 24 19:16:44 2005
From: me at privacy.net (Dan Sommers)
Date: 24 Apr 2005 19:16:44 -0400
Subject: How to "generalize" a function?
References: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
Message-ID: <m2ekcz7okj.fsf@unique.fully.qualified.domain.name.yeah.right>

On Sun, 24 Apr 2005 23:40:22 +0200,
Thomas K?llmann <koellmann at gmx.net> wrote:

> Hi, everybody!
> I'm teaching myself Python, and I have no experience in programming
> apart from some years of shell scripting. So, please bear with me.

> These two funktions are part of an administrative script I've set
> myself as a first lesson, and, as you will see, they're practically
> the same, except for one variable. So I'd like to weld them together
> -- but I can't find out how to.

[ two very similar functions snipped ]


> I feel it should be possible to use something like

> def writeFile(ip,keyword):
>     ...

Absolutely.

> but how would I construct expressions like

>     netmaskLineNum = conf.index(netmaskLine)

> in that case (netmask being the keyword here)?

netmaskLineNum and addressLineNum are just names.  They may mean
something to you and to people who read your program, but they mean
nothing to Python.  So just use generic names:

    for line in conf:
        if regex.search( line )
            theLine = line
    theLineNum = conf.index( theLine )

    etc.

HTH,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From ville at spammers.com  Wed Apr  6 16:10:01 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 23:10:01 +0300
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<mailman.1419.1112771209.1799.python-list@python.org>
	<du7ll7wicbx.fsf@mozart.cc.tut.fi>
	<mailman.1450.1112813708.1799.python-list@python.org>
Message-ID: <du7zmwb1xba.fsf@mozart.cc.tut.fi>

>>>>> "jjl" == John J Lee <jjl at pobox.com> writes:

    >> Other editors also do stuff Emacs won't do. Code completion is a
    >> killer feature and emacs sucks at it (yes, w/ Cedet too).

    jjl> I thought that too, but then I bound dabbrev-expand to F4,
    jjl> and it seems even better than 'proper' completion (for
    jjl> reducing keystrokes, anyway).

But does not work when you don't know/can't recall what methods are
available for the object you are looking at.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From iny+news at iki.fi  Sat Apr 23 01:08:21 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Sat, 23 Apr 2005 08:08:21 +0300
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
	<mailman.2289.1114190176.1799.python-list@python.org>
Message-ID: <m3k6muaxmi.fsf@iny.iki.fi>

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

> so you picked the wrong file format for the task, and the slowest
> tool you could find for that file format, and instead of fixing
> that, you decided that the regular expression engine was to blame
> for the bad performance. hmm.

What would you recommend instead?

I have searched alternatives, but somehow I still find XML the best
there is. It is a standard format with standard programming API.

I don't want to lose my calendar data. XML as a standard format makes
it easier to convert later to some other format. As a textual format
it is also readable as raw also and this eases debugging.

And my point is that the regular expression compilation can be a
problem in python. The current regular expression engine is just
unusable slow in short lived programs with a bit bigger amount of
regexps. And fixing it should not be that hard: an easy improvement
would be to add some kind of storing mechanism for the compiled
regexps. Are there any reasons not to do this?

>> Nowdays I use libxml2-python as the XML parser and so the problem is
>> not so acute anymore. (That is just harder to get in running for
>> python compiled from source outside the rpm system and it is not so
>> easy to use via DOM interface.)
>
> python has shipped with a fast XML parser since 2.1, or so.

With what features? validation? I really want a validating parser with
a DOM interface. (Or something better than DOM, must be object
oriented.)

I don't want to make my programs ugly (read: use some more low level
interface) and error prone (read: no validation) to make them fast. 

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From none  Wed Apr 27 16:40:18 2005
From: none (Hansan)
Date: Wed, 27 Apr 2005 22:40:18 +0200
Subject: Problem with sending a variable(python) while using html
References: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
	<mailman.2596.1114630252.1799.python-list@python.org>
Message-ID: <426ff886$0$13746$ba624c82@nntp03.dk.telia.net>

Hi.

Sorry forgot to post a "non-working" example

That could be
print "<a href=script.py?id=", variable,  "'>", "some text"  <input 
type=hidden name="eventid" value='''+str(variable_name)+'''>'''</a>"

I know that it isnt very creative, but I am having a hard time getting html 
to work together with python.

When the link "some text" is clicked I want to send both the first variable 
called variable and the second one(variable_name) to the script (script.py)

Hope that makes some sense :)


"Jaime Wyant" <programmer.py at gmail.com> wrote in message 
news:mailman.2596.1114630252.1799.python-list at python.org...
On 4/27/05, Hansan <none at bag.python.org> wrote:
> Hi all.
>
> I am working on a webpage where I use python and html.
>
> When I want to send one variable to a new script/page I use the following
> code:
> 0) print '''<input type=hidden name="eventid"
> value='''+str(variable_name)+'''>'''
>
> This works fine, the problem occurs when I want to send a variable to a 
> page
> while using a 1)meta refresh or a 2)Href.
> 1) and 2) works fine as they are but not when I try to send the variable
> with them.
>
> The working version of 1) and 2) could look like
> 1) print ''<META HTTP-EQUIV="Refresh" CONTENT="0;URL=page xxx">'''
> 2) print "<a href='page xxx?id=", variable,  "'>", "some text", "</a>"
>

What exactly does the "non-working" version look like?  Perhaps a
snippet of broken code would be helpful here?

jw 




From jerf at jerf.org  Tue Apr 26 15:25:57 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 15:25:57 -0400
Subject: regex over files
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<mailman.2539.1114540486.1799.python-list@python.org>
Message-ID: <pan.2005.04.26.19.25.54.737109@jerf.org>

On Tue, 26 Apr 2005 19:32:29 +0100, Robin Becker wrote:

> Skip Montanaro wrote:
>>     Robin> So we avoid dirty page writes etc etc. However, I still think I
>>     Robin> could get away with a small window into the file which would be
>>     Robin> more efficient.
>> 
>> It's hard to imagine how sliding a small window onto a file within Python
>> would be more efficient than the operating system's paging system. ;-)
>> 
>> Skip
> well it might be if I only want to scan forward through the file (think lexical 
> analysis). Most lexical analyzers use a buffer and produce a stream of tokens ie 
> a compressed version of the input. There are problems crossing buffers etc, but 
> we never normally need the whole file in memory.

I think you might have a misunderstanding here. mmap puts a file into
*virtual* memory. It does *not* read the whole thing into physical memory;
if it did, there would be no purpose to mmap support in the OS in the
first place, as a thin wrapper around existing file calls would work.

> If the lexical analyzer reads the whole file into memory then we need more 
> pages. The mmap thing might help as we need only read pages (for a lexical scanner).

The read-write status of the pages is not why mmap is an advantage; the
advantage is that the OS naturally and transparent is taking care of
loading just the portions you want, and intelligently discarding them when
you are done (more intelligently than you could, even in theory, since it
can take advantage of knowing the entire state of the system, your program
can't). 

In other words, as Skip was trying to tell you, mmap *already
does* what you are saying might be better, and it does it better than you
can, even in theory, from inside a process (as the OS will not reveal to
you the data structures it has that you would need to match that
performance).

As you try to understand mmap, make sure your mental model can take into
account the fact that it is easy and quite common to mmap a file several
times larger than your physical memory, and it does not even *try* to read
the whole thing in at any given time. You may benefit from
reviewing/studying the difference between virtual memory and physical
memory.


From sxanth at cs.teiath.gr  Sat Apr  2 04:40:26 2005
From: sxanth at cs.teiath.gr (stelios xanthakis)
Date: Sat, 02 Apr 2005 12:40:26 +0300
Subject: Looking for Benchmarklets to improve pyvm
In-Reply-To: <1112377347.642818.56520@l41g2000cwc.googlegroups.com>
References: <mailman.1187.1112369071.1799.python-list@python.org>
	<1112377347.642818.56520@l41g2000cwc.googlegroups.com>
Message-ID: <424E688A.6000201@cs.teiath.gr>

coffeebug wrote:
>
> Newbie here ("new" to the language and scripting in general).
> I'm trying to figure out what you mean by bytecode.  Do you mean
> a virtual python environment that can be hosted by any anonymous
> operating system?   For example, you want to run Python programs on
> BEOS so you crank up its version of PYVM and load a Python source code
> and run it?

The pyc files.  See module 'compile' and module 'dis'.


Stelios


From .  Wed Apr 13 18:50:06 2005
From: . (.)
Date: 13 Apr 2005 17:50:06 -0500
Subject: JUST ANOTHER SPAMMER!
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
Message-ID: <t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>

Nuf said.


From theoryboy at my-deja.com  Thu Apr 28 19:16:58 2005
From: theoryboy at my-deja.com (Peter Saffrey)
Date: 28 Apr 2005 16:16:58 -0700
Subject: Python site-packages and import
Message-ID: <ced73313.0504281516.41b23879@posting.google.com>

I'm trying to write a python service, with an executable in
/usr/local/bin, but modules that are kept in a sub-directory of
/usr/lib/python/site-packages.

Using apt-proxy as my template, I've put the modules in
/usr/lib/python/site-packages/mymodules and tried to import them with
import mymodules.module1. However, this doesn't seem to be working,
even though something very similar works for apt-proxy. I thought this
might be something to do with sys.path, but I can't work out why it's
different for my modules and those used by apt-proxy.

To be fair, it is past midnight, and I'm probably just being stupid.
Would anybody care to point out where? :)

Peter


From richardblackwood at cloudthunder.com  Sun Apr 24 00:59:45 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 00:59:45 -0400
Subject: Variables
In-Reply-To: <426b255d.375304108@news.oz.net>
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net>
Message-ID: <426B27C1.4000907@cloudthunder.com>

Bengt Richter wrote:

>On Sat, 23 Apr 2005 22:45:14 -0400, Richard Blackwood <richardblackwood at cloudthunder.com> wrote:
>
>  
>
>>Robert Kern wrote:
>>
>>    
>>
>>>Richard Blackwood wrote:
>>>
>>>      
>>>
>>>>To All:
>>>>
>>>>   Folks, I need your help. I have a friend who claims that if I write:
>>>>
>>>>foo = 5
>>>>
>>>>then foo is NOT a variable, necessarily. If you guys can define for 
>>>>me what a variable is and what qualifications you have to back you, I 
>>>>can pass this along to, hopefully, convince him that foo is indeed a 
>>>>variable.
>>>>        
>>>>
>>>None of us can do that unless you tell us what he thinks the word 
>>>"variable" means. The terminology is a bit fluid. I suspect that your 
>>>friend applying a somewhat restricted notion of "variable" that 
>>>coincides with the behavior of variables in some other language.
>>>
>>>      
>>>
>>Indeed, this language is math. My friend says that foo is a constant and 
>>necessarily not a variable. If I had written foo = raw_input(), he would 
>>say that foo is a variable. Which is perfectly fine except that he 
>>insists that since programming came from math, the concept of variable 
>>is necessarily the identical. This can not be true. For example, I may 
>>define foo as being a dictionary, but I can not do this within math 
>>because there is no concept of dictionaries within mathematics; yet foo 
>>is a variable, a name bound to a value which can change.
>>    
>>
>
>Maybe he doesn't know that foo = 5 in Python is not an equation as in math,
>but a Python source language statement to be translated to a step in some
>processing sequence.
>
>Tell him in Python foo is a member of one set and 5 is a member of another,
>and foo = 5 expresses the step of putting them into correspondence
>to define a mapping, not declaring them equal.
>  
>
Could I honestly argue this to him? From what basis do I argue that it 
is not an equation? In any event, he would likely (passionately) 
disagree considering his notion that programming is an off-shoot of math 
and thus at the fundamental level has identical concepts and rules. 
Believe it or not, he used to be a programmer. Back in the day (while I 
was getting my PhD in philosophy), he was a employed programmer using 
Cobol, Fortran, and other languages like that. Did his seemingly 
peculiar definition of variable exist at that time?

>Even in math notation, ISTM important to distinguish between
>a finger and what it may for the moment be pointing at.
>
>Regards,
>Bengt Richter
>  
>



From axel at straschil.com  Fri Apr  8 12:21:22 2005
From: axel at straschil.com (Axel Straschil)
Date: 08 Apr 2005 16:21:22 GMT
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
Message-ID: <slrnd5dbs1.f3b.axel@m2.sine>

Hello!

> If I have a simple dictionary, where the value is a class or function,
> is there an interface through which it can discover what its key is?

The key of a value may not be unique, so you can also get a tupe of
keys, like dict(a=1, b=1), the key's of 1 are a and b.

For unique values, I did something like that couple of weeks ago, the
thing you would need is the getKey thing, it's fast, but needs much
memory for big structures becouse I use two dicts.
If speed does not matter:

class ReverseDict(dict):
	def get_keys(self, value):
		keys = []
		for k, v in self.items():
			if v == value: keys.append(k)
		return keys

class UniqueReverseDict(dict):
	"""
	A dictionary that can resolute reverse: A object to a key. Both, the Key and
	the Value must be unique.
	"""
	
	def __init__(self, **kws):
		super(UniqueReverseDict, self).__init__(kws)
		self.__reverse = {}

	def __setitem__(self, k, v):
		super(UniqueReverseDict, self).__setitem__(k, v)
		self.__reverse[v] = k
	
	def __update_reverse(self):
		self.__reverse.clear()
		for k, v in self.items():
			self.__reverse[v] == k
	
	def has_value(self, v):
		return self.__reverse.has_key(v)
	
	def __delitem__(self, k):
		self.__reverse[self[k]]	
		super(UniqueReverseDict, self).__delitem__(k)

	def clear(self):
		self.__reverse.clear()
		super(UniqueReverseDict, self).clear()
		
	def copy(self):
		return UniqueReverseDict(self)
	
	def pop(self, k):
		del self.__reverse[self[k]]
		return self.pop(k)
	
	def popitem(self, **kws): 
		raise 'AxsPy.Misc.Structures.UniqueReverseDict', \
			'NotImplemented'
	
	def setdefault(self, **kws): 
		raise 'AxsPy.Misc.Structures.UniqueReverseDict', \
			'NotImplemented'
	
	def update(self, **kws):
		super(UniqueReverseDict, self).update(**kws)
		self.__update_reverse()
		
	def getKey(self, v): return self.__reverse[v]

Lg,
AXEL
-- 
"Aber naja, ich bin eher der Forentyp." Wolfibolfi's outing in 
http://www.informatik-forum.at/showpost.php?p=206342&postcount=10


From http  Sun Apr  3 10:30:29 2005
From: http (Paul Rubin)
Date: 03 Apr 2005 07:30:29 -0700
Subject: string goes away
References: <mailman.1156.1112322721.1799.python-list@python.org>
	<424FFD54.6080401@v.loewis.de>
Message-ID: <7xhdioj5kq.fsf@ruckus.brouhaha.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
> Out of curiosity: when thinking about Python 3.0, what is the timespan
> in which you expect that to appear? Before 2010? After 2010? After 2020?

I'm not terribly worried about Python 3.0 incompatibilities, whenever
those are.  There are already three incompatible Python versions
(CPython, Jython, IronPython) with PyPy coming right along.  If any of
those newer ones take off in popularity, there's going to be much more
interoperability hassle than 3.0 will cause.


From bokr at oz.net  Thu Apr 14 06:05:43 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 14 Apr 2005 10:05:43 GMT
Subject: Inelegant
References: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>
	<mailman.1879.1113463795.1799.python-list@python.org>
Message-ID: <425e2fa5.350189245@news.oz.net>

On Thu, 14 Apr 2005 02:43:40 -0500, Terry Hancock <hancock at anansispaceworks.com> wrote:

>On Thursday 14 April 2005 02:03 am, Dan wrote:
>> If you use triple quotes to define a string, then the newlines are
>> implicitly included.  This is a very nice feature.  But if you're
>> inside a function or statement, then you'll want the string to be
>> positioned along that indentation.  And the consequences of this is
>> that the string will include those indentations.
>>  [...]
>> But that's just ugly. 
>
>Yeah, it's definitely a wart.  So much so that recent Python
>distributions include a function to fix it:
>
>>>> from textwrap import dedent
>>>> string_block = dedent("""
>...                       This string will have the leading
>...                       spaces removed so that it doesn't
>...                       have to break up the indenting.
>...                       """)
>>>> string_block
>"\nThis string will have the leading\nspaces removed so that it doesn't\nhave to break up the indenting.\n"
>>>> print string_block
> 
>This string will have the leading
>spaces removed so that it doesn't
>have to break up the indenting.
> 

I never liked any of the solutions that demand bracketing the string with expression brackets,
but I just had an idea ;-)

 >>> class Dedent(object):
 ...     def __init__(self, **kw): self.kw = kw
 ...     def __add__(self, s):
 ...         lines = s.splitlines()[1:]
 ...         margin = self.kw.get('margin', 0)*' '
 ...         mnow = min(len(L)-len(L.lstrip()) for L in lines)
 ...         return '\n'.join([line[mnow:] and margin+line[mnow:] or '' for line in lines])
 ...
 ...

Normally you wouldn't pass **kw in like this,
you'd just write
         mystring = Dedent()+\

or

         mystring = Dedent(margin=3)+\

but  I wanted to control the print. Note the the first line, unless you escape it (ugly there)
is zero length and therefore has zero margin, which subverts the other shifting, so I just drop that line.
You have to live with the backslash after the + as payment for preferring not to have parentheses ;-)

 >>> def foo(**kw):
 ...     mystring = Dedent(**kw)+\
 ...     """
 ...     This makes
 ...        for a cleaner isolation
 ...     of the string IMO.
 ...     """
 ...     return mystring
 ...
 >>> print '----\n%s----'%foo()
 ----
 This makes
    for a cleaner isolation
 of the string IMO.
 ----
 >>> print '----\n%s----'%foo(margin=3)
 ----
    This makes
       for a cleaner isolation
    of the string IMO.
 ----

Regards,
Bengt Richter


From bokr at oz.net  Sat Apr 30 03:02:30 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 30 Apr 2005 07:02:30 GMT
Subject: module exports a property instead of a class -- Evil?
References: <1114797779.371054.189950@g14g2000cwa.googlegroups.com>
Message-ID: <42732c00.280175481@news.oz.net>

On 29 Apr 2005 11:02:59 -0700, gry at ll.mit.edu wrote:

>I often find myself wanting an instance attribute that can take on only
                                ^^^^^^^^
without checking deeply, are you not sharing state among all instance?
See following for an alternative way, allowing initialization by a
first assignment of a name sequence, followed by normal operation on
a per instance basis.

>a few fixed symbolic values. (This is less functionality than an enum,
>since there are no *numbers* associated with the values).  I do want
>the thing to fiercely object to assignments or comparisons with
>inappropriate values.  My implementation below gets me:
>
>.import mode
>.class C(object):
>.   status = mode.Mode('started', 'done', 'on-hold')
>.
>.c=C()
>.c.status = 'started'
>.c.status = 'stated': #Exception raised
>.if c.status == 'done': something
>.if c.status == 'stated': #Exception raised
>.if c.status.done: something  #simpler and clearer than string compare
>.if c.status < 'done': something # Mode arg strings define ordering
>
>I would appreciate comments on the overall scheme, as well as about the
>somewhat sneaky (I think) exporting of a property-factory instead of a
>class.  My intent is to provide a simple clear interface to the client
>class ("C" above), but I don't want to do something *too* fragile or
>confusing...
>(I'd also welcome a better name than "Mode"...)
>
>-------------------------- mode.py ----------------------
>class _Mode:  #internal use only, not exported.
>    def __init__(self, *vals):
>        if [v for v in vals if not isinstance(v, str)]:
>            raise ValueError, 'Mode values must be strings'
>        else:
>            self.values = list(vals)
>
>    def set(self, val):
>        if val not in self.values:
>            raise ValueError, 'bad value for Mode: "%s"' % val
>        else:
>            self.state = val
>
>    def __cmp__(self, other):
>        if other in self.values:
>            return cmp(self.values.index(self.state),
>self.values.index(other))
>        else:
>            raise ValueError, 'bad value for Mode comparison'
>
>    def __getattr__(self, name):
>        if name in self.values:
>            return self.state == name
>        else:
>            raise AttributeError, 'no such attribute: "%s"' % name
>
>
>def Mode(*vals): # *function* returning a *property*, not a class.
>    m = _Mode(*vals)
>    def _insert_mode_get(self):
>        return m
>    def _insert_mode_set(self, val):
>        m.set(val)
>    return property(_insert_mode_get, _insert_mode_set)
>-----------------------------------------------------------
>
Not tested beyond what you see ;-)

----< state.py >----------------------------------------------------------------------------------------------
# set up to validate state name strings
namerefcode = compile('a','','eval').co_code
non_name_chars = []
for c in (chr(i) for i in xrange(256)):
    try:
        if compile(c, '', 'eval').co_code != namerefcode:
            non_name_chars.append(c)
    except (SyntaxError, TypeError):
        non_name_chars.append(c)
non_name_chars = ''.join(non_name_chars)
idem = ''.join([chr(i) for i in xrange(256)])    
        
class Status(object):
    def __get__(self, inst, cls=None):
        if inst is None: return self
        if not '_state' in inst.__dict__:
            raise ValueError, 'Uninitialized instance state names'
        return inst._state
    def __set__(self, inst, value):
        if not hasattr(inst, '_state'): inst._state = self.State(*value)
        else: inst._state._setv(value)
    
    class State(object):
        def __init__(self, *names):
            for s in names:
               if s[:1].isdigit() or s!= s.translate(idem, non_name_chars):
                    raise ValueError, '%r is not a valid name'%s
            self._names = list(names)
            self._value = names[0]
        def _name_ck(self, name):
            if name not in self._names:
                raise AttributeError(
                    'Legal names are: %s -- not %r' % (', '.join(map(repr, self._names)), name)) 
        def __getattr__(self, attr):
            if attr.startswith('_'):
                return object.__getattribute__(self, attr)
            self._name_ck(attr)
            return self._value == attr
        def _setv(self, value):
            self._name_ck(value)
            self._value = value
        def __cmp__(self, other):
            self._name_ck(other)
            return cmp(self._names.index(self._value), self._names.index(other))
        def __str__(self):
            return self._value

def test():
    class C(object):
        status = Status()
    instances = [C(), C(), C()]
    nameslist = map(str.split, ['started done on_hold', 'one two three', 'UNK running stopped'])
    for i, (inst, names) in enumerate(zip(instances, nameslist)):
        inst.status = names
        inst.status = names[i]
        print 'Instance %s names: %r' %(i, inst.status._names)
    for i, inst in enumerate(instances):
        print i, 'names:',inst.status._names
        print i, 'current:', inst.status
        print i, '     '.join([' .%s? -> %s'% (name, getattr(inst.status, name)) for name in inst.status._names])
        print i, '     '.join(['==%s? -> %s'% (name, inst.status == name) for name in inst.status._names])
        print i, '     '.join([' >%s? -> %s'% (name, inst.status  > name) for name in inst.status._names])
        print i, '     '.join([' <%s? -> %s'% (name, inst.status  < name) for name in inst.status._names])
        try: inst.status = 'fini'
        except Exception, e:
            print 'Exception %s: %s' %(e.__class__.__name__, e)
    class D(object):
        hownow = Status()
    dinst = D()
    for bogus in ['this$', 'an#d', 'with space', '4digitstart', 'bad\x00']:
       try: dinst.hownow = ('verily', bogus, 'will', 'fail')
       except Exception, e:
           print 'Exception %s: %s' %(e.__class__.__name__, e)
    
if __name__ == '__main__': test()
--------------------------------------------------------------------------------------------------------------
Result:

[ 0:00] C:\pywk\clp>py24 state.py
Instance 0 names: ['started', 'done', 'on_hold']
Instance 1 names: ['one', 'two', 'three']
Instance 2 names: ['UNK', 'running', 'stopped']
0 names: ['started', 'done', 'on_hold']
0 current: started
0  .started? -> True      .done? -> False      .on_hold? -> False
0 ==started? -> True     ==done? -> False     ==on_hold? -> False
0  >started? -> False      >done? -> False      >on_hold? -> False
0  <started? -> False      <done? -> True      <on_hold? -> True
Exception AttributeError: Legal names are: 'started', 'done', 'on_hold' -- not 'fini'
1 names: ['one', 'two', 'three']
1 current: two
1  .one? -> False      .two? -> True      .three? -> False
1 ==one? -> False     ==two? -> True     ==three? -> False
1  >one? -> True      >two? -> False      >three? -> False
1  <one? -> False      <two? -> False      <three? -> True
Exception AttributeError: Legal names are: 'one', 'two', 'three' -- not 'fini'
2 names: ['UNK', 'running', 'stopped']
2 current: stopped
2  .UNK? -> False      .running? -> False      .stopped? -> True
2 ==UNK? -> False     ==running? -> False     ==stopped? -> True
2  >UNK? -> True      >running? -> True      >stopped? -> False
2  <UNK? -> False      <running? -> False      <stopped? -> False
Exception AttributeError: Legal names are: 'UNK', 'running', 'stopped' -- not 'fini'
Exception ValueError: 'this$' is not a valid name
Exception ValueError: 'an#d' is not a valid name
Exception ValueError: 'with space' is not a valid name
Exception ValueError: '4digitstart' is not a valid name
Exception ValueError: 'bad\x00' is not a valid name

Regards,
Bengt Richter


From almondb at gmail.com  Thu Apr  7 11:33:58 2005
From: almondb at gmail.com (Brian)
Date: 7 Apr 2005 08:33:58 -0700
Subject: Best editor?
In-Reply-To: <4253a239$0$11600$636a15ce@news.free.fr>
References: <mailman.1416.1112759859.1799.python-list@python.org>
	<4253a239$0$11600$636a15ce@news.free.fr>
Message-ID: <1112888038.904313.72410@z14g2000cwz.googlegroups.com>

Yes, we vi/vim users are apparently extraordinary.  Is that such a sad
thing?  ;-)



From bvande at po-box.mcgill.ca  Mon Apr  4 20:05:56 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 04 Apr 2005 20:05:56 -0400
Subject: Super Newbie Question
In-Reply-To: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
References: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
Message-ID: <4251D664.3010809@po-box.mcgill.ca>

joeyjwc at gmail.com said unto the world upon 2005-04-04 19:39:

<SNIP>

> I want the "engine" to read the file, write its contents to another
> temporary file (for now it just writes the contents; later it will
> format it before writing the contents) and then deletes the *contents*
> of the temporary file after printing out the result, but not the
> temporary file itself.  I want it to do this because that temporary
> file will be reused to write to for other pages as well.
> 
> In short, how might I go about deleting just the contents of a file?
> I tried several methods with my limited knowledge but had no luck.
> 
> Thank you very much for answering a lowly newbie's question.  I really
> appreciate it.
> 
> P.S.  If there's a better that you think to perform what I am saying,
> I'd like to be enlightened.  But I'd also like my question answered
> too, in case I ever need to do something similar again.

Hi,

if I understand your question, I think the answer to how to delete 
will tell you that you don't need to worry about it.

 >>> old_file = open(file_path_to_delete, 'w')
 >>> old_file.write('')
 >>> old_file.close()

That will write an empty string to the file, erasing all its contents, 
while preserving the file in your file system (as one of 0 bytes).

So, I think this shows that your worry (at least as I understood it is 
misplaced. Unless you have a free space on the disk issue at hand, you 
don't need to bother with a delete step -- just open the file in write 
mode when you want to write to it again, and that will over-write any 
extant contents.

HTH,

Brian vdB





From bokr at oz.net  Tue Apr 26 05:25:44 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 26 Apr 2005 09:25:44 GMT
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<426dab5c.540679656@news.oz.net>
	<1114497089.020512.309660@o13g2000cwo.googlegroups.com>
Message-ID: <426df41d.559304397@news.oz.net>

On 25 Apr 2005 23:31:29 -0700, "George Sakkis" <gsakkis at rutgers.edu> wrote:

>> I'm not clear on what your real goal is, but if you just want a
>snapshot
>> of what locals() is just before exiting func, that could be done with
>> a byte-code-hacking decorator with usage looking something like
>>
>>     #func defined before this
>>     func_locals = {}
>>     @getlocals(func, func_locals)
>>     def probefunc(): pass
>>
>> which would make a probefunc function that would be identical to func
>> except that before exiting, it would do func_locals.update(locals()).
>> (you might want func_locals to be a list and do
>func_locals.append(locals())
>> in case func is recursive and you are interested in the all the
>locals).
>
>That's all good, at least if I knew how to poke with bytecodes ;-)
>What's a good starting point to look at ?
>
>By the way, the original problem was yet another property packager,
>which I posted as recipe at the cookbook:
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410698.
>
I made a couple of byte code hacking decorators based on the techniques
in Raymond Hettinger's optimization decorators, which optimize access to
globals and fold constant expressions and I forgot what else.

I stripped all the optimization out since I was interested in injecting
code to preset values for selected named local variables, to avoid using
the default argument value hack. Another variant used this plus modifying
the call signature to do a version of currying. Also modified the line
number map. You will have some trickier stuff to work out though, I think,
since there may be many returns, and they can happen in try/except/finally
context, and you'll have to see how that translates (you can see with
disassembler), and then if you can't just overwrite some returns to jump
to a common place, you may have to widen a place to put code and adjust
any jumps across modified stuff.

It would be much nicer if you can get the source and do it via AST mods.
I am toying with the concept of a custom importer that does import-time
"decoration" of statements or statement sequences (with their suites)

I am thinking of using '@@' something like

    # ... statments
    @@module.decorator(nstatements, args) # how many statements, and whatever other args
    # decorated statement(s)
    ...   

Where module has to be imported already at the time of the decorating-importer's importation
of the above (simplest way to guarantee that it's available to execute, but not the only way).

Of course this means that a .py file has to be available for the code you are interesting in
modifying, and you have to catch the import. (Since there's a '@@' you will know if you don't ;-)

Anyway, I am not going to have time for that for some time, so I'll mention what I had in mind,
in case someone wants to do something with it:

The decorating-importer would find the @@ lines and e.g. change

    @@decomodule.decorator(nstatements, <anything legal>) # how many statements, and whatever other args

to

    __AT_AT_DECO__ = decomodule.decorator(nstatementsliteral, <anything legal> ...)

which should just be a matter of src.replace('@@','__AT_AT_DECO__ = ') on lines where
line.lstrip().startswith('@@') is true, thus making valid python source.

It would then call compiler.parse with the modified source for an AST to work with.
It would walk the AST to find the __AT_AT_DECO__ assignments (saving a reference to the containing statement
list and index of the __AT_AT_DECO__ = ... statement in the list, and extract the nstatementsliteral
and then call the decomodule.decorator with a slice of statements to be replaced, including the __AT_AT_DECO__
statement, which is passed as the first statement AST node in the slice, and may have interesting things
in the <anything legal> part, which the decorating-importer doesn't need to know about. It just needs the
two names decomodule and decorator and the number of statements, replacing them something like

    containing_statement_list[index:index+int(nstatementsliteral)+1] = getattr(__import__(decomodule), decorator)(
             containing_statement_list[index:index+int(nstatementsliteral)+1])

IOW pass the slice of statement list nodes to the decorator and expect it to get additional info from the
__AT_AT_DECO__ = statement that is included, and expect it to return a replacement list of AST statment nodes to
replace what it got, which might be minor or major modifications.

The walk would continue until all the __AT_AT_DECO__ regions were replaced, and then the whole AST would be
compiled and made into a module delivered as if it were an ordinary import.

Note that this is not a macro preprocessor, but depending on what is in decomodule.decorator, one could mess with
legal source (after src.replace('@@','__AT_AT_DECO__ = ') it has to satisfy compiler.parse, and later check also)
pretty seriously, but it has to be pretty legal to start. Of course one could abuse magic-content strings, but
metaclasses can already do a lot of that. That's not what I'm hoping to do. Just super-duper-decoration ;-)

Anyway, that's a sketch of the idea. I won't have time for it or much else for a longish while now.
If someone's interested, they can quote this and start another thread ;-)

Regards,
Bengt Richter


From jbo at cannedham.ee.ed.ac.uk  Mon Apr  4 06:23:53 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Mon, 04 Apr 2005 11:23:53 +0100
Subject: import and scope inconsistency?
Message-ID: <d2r4j1$ggn$1@scotsman.ed.ac.uk>

I would be very grateful for help on the following.

I have the following modules in a program. Names changed to protect the
innocent.

1.Simulation
2.Branches
3.MyFiles

I import Branches, Myfiles and the publicly available module Numeric
inside Simulation.

Branches and MyFiles both contain class definitions.

I can call MyFiles methods inside methods of the Brances classes.
I cannot call Numeric methods inside methods of the Brances classes.

1. I was surprised I could call MyFiles methods in Branches methods.
2. Since I was used to using modules imported in the parent module I was
surprised I couldn't use Numeric methods.

What's going on?

Thanks
Jim O'Donnell


From grahamd at dscpl.com.au  Fri Apr  1 00:44:07 2005
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 31 Mar 2005 21:44:07 -0800
Subject: mod_python and zope
References: <m34qercv5j.fsf@moroni.pp.asu.edu>
Message-ID: <1112334247.399352.213730@o13g2000cwo.googlegroups.com>


David Bear wrote:
> I will be running zope, and I would also like to run mod_python. The
problem
> arised when zope wants a threaded version of python and mod_python
wants
> no_threads.

Threads work fine with mod_python. What makes you think they don't?
What
versions of Apache/Python/mod_python are you attempting to use?

Although threads work okay with mod_python, there are a couple of
patches
you might want to look at applying to mod_python if you intend using a
multithreaded MPM. Details of these can be found at:

  http://www.dscpl.com.au/projects/vampire/patches.html

BTW, for discussion of mod_python issues, the mod_python mailing list
might
be a better place.

  http://mailman.modpython.org/mailman/listinfo/mod_python

Graham



From could.net at gmail.com  Wed Apr  6 22:05:08 2005
From: could.net at gmail.com (could ildg)
Date: Thu, 7 Apr 2005 10:05:08 +0800
Subject: how can I extract all urls in a string by using re.findall() ?
Message-ID: <311b5ce105040619052e00e10c@mail.gmail.com>

I want to retrieve all urls in a string. When I use re.fiandall, I get
a list of tuples.
My code is like below:

[code]
url=unicode(r"((http|ftp)://)?(((([\d]+\.)+){3}[\d]+(/[\w./]+)?)|([a-z]\w*((\.\w+)+){2,})([/][\w.~]*)*)")
m=re.findall(url,html)
for i in m:
   print i
[/code]

html is a variable of string type which contains many urls in it.
the code will print many tuples, and each tuple seems not to represent
a url. e.g, one of them is as below:

(u'http://', u'http', u'image.zhongsou.com/image/netchina.gif', u'',
u'', u'', u'', u'image.zhongsou.com', u'.com', u'.com',
u'/netchina.gif')

Why is there two "http" in it? and why are there so many ampty strings
in the tupe above? It's obviously not a url. How can I get the urls
correctly?

Thanks in advance.
-- 
????????????????????
????????????????
????????


From martin at v.loewis.de  Sun Apr  3 10:21:09 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 03 Apr 2005 16:21:09 +0200
Subject: string goes away
In-Reply-To: <mailman.1158.1112324403.1799.python-list@python.org>
References: <424CCED4.60000@imb-jena.de>	<16972.46839.309827.574430@montanaro.dyndns.org>
	<mailman.1158.1112324403.1799.python-list@python.org>
Message-ID: <424FFBD5.6090505@v.loewis.de>

Andreas Beyer wrote:
> Yeeh, I was expecting something like that. The only reason to use map() 
> at all is for improving the performance.
> That is lost when using list comprehensions (as far as I know). So, this 
> is *no* option for larger jobs.

Don't believe anything you hear right away, especially not when it comes
to performance, especially not wrt. Python.

martin at mira:~$ python -m timeit -s "items=['']*10000;import string" 
"map(string.upper, items)"
100 loops, best of 3: 6.32 msec per loop
martin at mira:~$ python -m timeit -s "items=['']*10000;import string" 
"[s.upper for s in items]"
100 loops, best of 3: 2.22 msec per loop

So using map is *no* option for larger jobs.

Of course that statement is also false. Performance prediction is very
difficult, and you cannot imply much from this benchmark. In other
cases, list comprehension may be slower than map. More likely, for real
(i.e. non-empty) strings, the cost of .upper will make the precise
implementation of the loop irrelevant for performance reasons.

Regards,
Martin


From axel at straschil.com  Fri Apr  8 02:40:20 2005
From: axel at straschil.com (Axel Straschil)
Date: 08 Apr 2005 06:40:20 GMT
Subject: Multiple inheritance: Interface problem workaround,
	please comment this
References: <slrnd5am6f.7ed.axel@m2.sine> <ybCdnTBdnr30w8jfRVn-pQ@comcast.com>
Message-ID: <slrnd5c9qk.9rm.axel@m2.sine>

Hello!

>     (1) make A or B a mixin class that doesn't need __init__ called, or

Would be a solution for classes that just give functionality, no
data-structures. In that case, i would use functions, no classes ;-)

I've seen code where there are classes without init and the hope that
self has what they expect, not realy the blackbox oop should produce!

>     (2) make class AB inherit from A and delegate to B (or vice versa)

As every multiple inheritance can be solved as single inheritance, if no
better solution for my "hungry monster problem" is found, this would be
the best way. Don't take my AB example as a real word example ;-)

Also think of to libraries with classes which have inheritance depth
five or more (that's what I've got). Somtimes you want to stick things
together without knowing the inheritance tree.

So, if there are ready class-modules, and I want to use them for
multiple inheritance, I've to rewrite the init's of classes in the
module!

For me, python is the best solution in oop-webprogramming (tried perl,
got ugly code, tried php, got php ;-), tried C++, takes too long for web
projects). The only thing I'm dislike is the super thing with multiple
inheritance, maby I shoud see pythons multiple inheritance as a nice to
have and not to use thing ;-)

Thanks,
AXEL.


From lbates at syscononline.com  Fri Apr 29 15:02:40 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 29 Apr 2005 14:02:40 -0500
Subject: Data smoothing algorithms?
In-Reply-To: <mailman.37.1114800769.14961.python-list@python.org>
References: <000c01c54c38$313eb580$0201a8c0@mcuf7>
	<mailman.37.1114800769.14961.python-list@python.org>
Message-ID: <MLGdnZTDLvEpGe_fRVn-rw@comcast.com>

Sounds like what you are looking for is spline interpolation.
Given a set of datapoints is passes spline curves through
each point giving you smooth transitions.  Did a lot of this
in Fortran MANY years ago.

Google turned up:

http://www.scipy.org/documentation/apidocs/scipy/scipy.interpolate.html

http://cmp.felk.cvut.cz/~kybic/thesis/pydoc/bigsplines.html

http://www.mirror5.com/software/plotutils/plotutils.html

Good Luck
Larry Bates

John J. Lee wrote:
> "Anthra Norell" <anthra.norell at tiscalinet.ch> writes:
> 
> 
>>Hi,
>>
>>The following are differences of solar declinations from one day to
>>the next, (never mind the unit). Considering the inertia of a
>>planet, any progress of (apparent) celestial motion over regular
>>time intervals has to be highly regular too, meaning that a plot
>>cannot be jagged. The data I googled out of Her Majesty's Nautical
>>Almanac are merely nautical precision and that, I suppose, is where
>>the jitter comes in. There's got to be algorithms out there to iron
>>it out. If it were a straight line, I could do it. But this, over
>>the whole year, is a wavy curve, somthing with a dominant sine
>>component. Suggestions welcome.
> 
> 
> The important thing is to have a (mathematical, hopefully) model of
> how you expect the data to vary with time.  Start from there, and
> then, for example, use regression to fit a curve to the data.
> 
> The "Numerical Recipes" (Press et al.) book is popular and IMHO is a
> good place to learn about these things (comes in several language
> flavours, including Fortran and C -- sadly no Python AFAIK), though
> the implementations aren't a great choice for serious "production"
> use, according to those in the know.
> 
> OTOH, there are quick and dirty methods that don't involve any model
> worth speaking of -- and Press et al. covers those too :-)
> 
> 
> John
> 


From jeffelkins at earthlink.net  Sun Apr 24 07:39:36 2005
From: jeffelkins at earthlink.net (jeff elkins)
Date: Sun, 24 Apr 2005 11:39:36 +0000
Subject: GUI woes
In-Reply-To: <200504241041.19200.jae@elkins.org>
References: <mailman.2361.1114307134.1799.python-list@python.org>
	<bcfrj2-ua9.ln1@home.rogerbinns.com>
	<200504241041.19200.jae@elkins.org>
Message-ID: <200504241139.36592.jeffelkins@earthlink.net>

On Sunday 24 April 2005 10:41 am, jeff elkins wrote:
> On Sunday 24 April 2005 03:11 am, Roger Binns wrote:
> > You have a mixture of different versions of wxPython in there.

> Thanks. I'll see if I can delete/reinstall and fix things.

Fixed and thanks for the clue :)

Jeff



From jstroud at mbi.ucla.edu  Tue Apr 26 20:01:46 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 26 Apr 2005 17:01:46 -0700
Subject: tkinter text width
Message-ID: <200504261701.22395.jstroud@mbi.ucla.edu>

Hello All,

I would like for a tkinter text widget to be aware of how big the frame that 
contains it is, then I would like for it to reset its width to the 
appropriate number of characters when this frame changes size.

I can get a cget("width") for the text, but this does not dynamically reflect 
the visible width. 

One way I can think of is getting the size of the font used in the widget then 
getting the width of the frame with cget then doing the appropriate math and 
configuring the text widget upon resize events.

I'm thinking that there must be a more straightforward way.

Any ideas?

James


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

http://www.jamesstroud.com/


From jstroud at mbi.ucla.edu  Tue Apr 19 16:33:17 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 19 Apr 2005 13:33:17 -0700
Subject: Array of Chars to String
Message-ID: <200504191333.17374.jstroud@mbi.ucla.edu>

Hello,

I am looking for a nice way to take only those charachters from a string that 
are in another string and make a new string:

>>> astr = "Bob Carol Ted Alice"
>>> letters = "adB"
>>> some_func(astr,letters)
"Bad"

I can write this like this:

astr = "Bob Carol Ted Alice"
letters = "adB"

import sets
alist = [lttr for lttr in astr if lttr in Set(letters)]
newstr = ""
for lttr in alist:
  newstr += lttr

But this seems ugly. I especially don't like "newstr += lttr" because it makes 
a new string every time. I am thinking that something like this has to be a 
function somewhere already or that I can make it more efficient using a 
built-in tool.

Any ideas?

James

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

http://www.jamesstroud.com/


From peter at somewhere.com  Fri Apr 15 05:47:14 2005
From: peter at somewhere.com (Peter Maas)
Date: Fri, 15 Apr 2005 11:47:14 +0200
Subject: Is Python appropriate for web applications?
In-Reply-To: <op.so85a1bgr3xrds@sony>
References: <op.so85a1bgr3xrds@sony>
Message-ID: <d3nvlj$oud$1@swifty.westend.com>

Unknown User schrieb:
> I am a Python programmer and I'm thinking about learning PHP, which is
> similar to C++

wrong

> (quite  different from Python).

true

> I want to start writing web applications. Do  you  think if I learn
 > PHP I'll develop faster?

Nobody but you can anawer this question. You'll have to try.

Does PHP have more features?

PHP has a rich library which probably outperforms any Python alternative
in terms of features. But this doesn't necessarily mean that you will
develop faster in PHP. The problem with Python is that you have to make
a choice among many solutions (roughly ordered by inreasing complexity):

- plain cgi
- Quixote
- modpython
- CherryPy
- Spice
- Webware
- Twisted
- ZOPE
...

Have a look at http://www.python.org/topics/web/

> How about the speed  of execution? 

There is no simple answer. Both languages use C functions which are
executed at CPU speed. But with interpreted code Python seems to be
approximately 3-4 times faster than PHP (http://dada.perl.it/shootout/).

> What are the pros and cons?

http://www.allsites.com/Top.Computers.Programming.Languages.Comparison_and_Review.html

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From sjmachin at lexicon.net  Fri Apr 29 20:17:57 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 30 Apr 2005 10:17:57 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>
Message-ID: <a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>

On Sat, 30 Apr 2005 00:40:50 +0100, Michael Hoffman
<cam.ac.uk at mh391.invalid> wrote:

>John Machin wrote:
> > [Michael Hoffman]:
>>>John Machin wrote:
>>>>[Michael Hoffman]:
>>>>
>>>>>for row in csv.reader(fileinput.input()):
>>>>
>>>>csv.reader requires that if the first arg is a file that it be opened
>>>>in binary mode.
>>>
>>>fileinput.input() is not a file.
>> 
>> Hair-splitter.
>
>Is name-calling really necessary?

I beg your pardon. How does: "Your point addresses the letter rather
than the spirit of the 'law'" sound?

>
>> It's an awk simulation and shouldn't be used for real-world data.
>
>I don't see why not, so long as your data is text.

Real-world data is not "text".

>
>>>I have tested this code and it works fine for the provided example.
>> 
>> Well I've got news for you: real-world data has embedded CRs, LFs and
>> (worst of all) ^Zs often enough, and you won't find them mentioned in
>> any documentation, nor find them in examples.
>
>That's nice. Well I agree with you, if the OP is concerned about embedded
>CRs, LFs and ^Zs in his data (and he is using Windows in the latter case),
>then he *definitely* shouldn't use fileinput.

And if the OP is naive enough not to be concerned, then it's OK, is
it?

>
>And otherwise, there's really no reason not to.

Except, perhaps, the reason stated in fileinput.py itself: 

"""
Performance: this module is unfortunately one of the slower ways of
processing large numbers of input lines.
"""


From shane at hathawaymix.org  Fri Apr 29 19:52:00 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Fri, 29 Apr 2005 17:52:00 -0600
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <d4u60o$akh$1@news2.netvision.net.il>
References: <d4u60o$akh$1@news2.netvision.net.il>
Message-ID: <4272C8A0.7050404@hathawaymix.org>

pythonchallenge wrote:
> For the riddles' lovers among you, you are most invited to take part
> in the Python Challenge, the first python programming riddle on the net.
> 
> You are invited to take part in it at:
> http://www.pythonchallenge.com

That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
"temporary end".

Shane

P.S. I hope I didn't hammer your server on step 3.  I was missing the
mark. :-)


From exarkun at divmod.com  Sat Apr 23 22:22:18 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Sun, 24 Apr 2005 02:22:18 GMT
Subject: Unicode problems, yet again
In-Reply-To: 0
Message-ID: <20050424022218.10340.838949708.divmod.quotient.21484@ohm>

On Sun, 24 Apr 2005 03:15:02 +0200, Ivan Voras <ivoras at something.ortheother> wrote:
>I have a string fetched from database, in iso8859-2, with 8bit characters, 
>and I'm trying to send it over the network, via a socket:

  You don't have a string fetched from a database, in iso-8859-2, alas.  That is the root of the problem you're having.  What you have is a unicode string.

  It's easy to go from this to what you want (iso-8859-2 encoded string), fortunately.  Just call unicodeStr.encode('iso-8859-2') and write the result over the socket.

>
>(Does anyone else feel that python's unicode handling is, well... suboptimal 
>at least?)

  Hmm.  Not really.  The only problem I've found with it is misguided attempt to "do the right thing" by implicitly encoding unicode strings, and this isn't so much of a problem once you figure things out, because you can always do things explicitly and avoid invoking the implicit behavior.

  Jp



From yhdanid at yahoo.com  Sat Apr 30 16:39:05 2005
From: yhdanid at yahoo.com (Obaid R.)
Date: 30 Apr 2005 13:39:05 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
Message-ID: <1114893545.927914.299170@l41g2000cwc.googlegroups.com>

Non-Offensive, Professional Sounding Name


First of all, there was no "diatribe", even
when you can claim there was one. Unless of
course you consider the contents of the Bible
from which I quote as such. Seeing that you
claimed that there was no truth in my post, I
was hoping to read proof in support of your
claim. To my disappointment, there was none.
Just a reference to the word "Allah" made,
alas, in haste.

I wish that you'd considered your words
before you rushed to post. I say that for the
following reason: did you know that there are
around 26 million Christian Arabs living in
the world today? Did you know that their
Arabic Bibles (together with their Arab Jews
brethren) have the word "Allah" exactly where
the word "God" appears in your English Bible?

Furthermore, did you know that in Malta, made
up of a population of staunch Catholics,
people use the word "Allah" for God in their
own language?

Perhaps you'd be interested in reading "Who
is Allah?"[1] and "The Word ALLAH in the
Arabic Bible"[2] both essays by Abu Iman 'Abd
ar-Rahman Robert Squires.

And in case you don't believe either of us,
then visit these links from
bible.gospelcom.net showing you how the word
"Allah" does appear in the Arabic Bible where
the word "God" appears in the English one.



FROM THE ARABIC BIBLE
=====================

Genesis 1: 1
In the beginning God created the heavens and the earth.
http://bible.gospelcom.net/bible?passage=GEN+1:1&language=arabic&version=IBS&showfn=on&showxref=on


Genesis 1: 8:
And God called the firmament Heaven. And there was evening and there
was morning, a second day.
http://bible.gospelcom.net/bible?passage=GEN+1:8&language=arabic&version=IBS&showfn=on&showxref=on


Mark 10: 18
And Jesus said unto him, Why callest thou me good? there is none good
but one, that is, God.
http://bible.gospelcom.net/bible?passage=MARK+10:18&language=arabic&version=IBS&showfn=on&showxref=on


John 3: 16
For God so loved the world that he gave his only Son, that whoever
believes in him should not perish but have eternal life.
http://bible.gospelcom.net/bible?passage=JOHN+3:16&language=arabic&version=IBS&showfn=on&showxref=on


Luke 3: 38
the son of Enos, the son of Seth, the son of Adam, the son of God.
http://bible.gospelcom.net/bible?passage=LUKE+3:38&language=arabic&version=IBS&showfn=on&showxref=on


Mark 1: 14
Now after John was arrested, Jesus came into Galilee, preaching the
gospel of God,
http://bible.gospelcom.net/bible?passage=MARK+1:14&language=arabic&version=IBS&showfn=on&showxref=on

Mark 3: 35
Whoever does the will of God is my brother, and sister, and mother.
http://bible.gospelcom.net/bible?passage=MARK+3:35&language=arabic&version=IBS&showfn=on&showxref=on





RESOURCES
=========

[1] Squires, Robert, "Who is Allah?" April 30, 2005:
http://www.wol.net.pk/truth/6who.htm
[2] Squires, Robert, "The Word ALLAH in the Arabic Bible" April 30,
2005: http://www.wol.net.pk/truth/6aib.htm



From steve at holdenweb.com  Fri Apr  8 01:37:13 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 01:37:13 -0400
Subject: How to name Exceptions that aren't Errors
In-Reply-To: <roy-139DDB.22114807042005@reader1.panix.com>
References: <3blfl8F6gt80jU1@individual.net>
	<roy-139DDB.22114807042005@reader1.panix.com>
Message-ID: <42561889.2080601@holdenweb.com>

Roy Smith wrote:
[...]
> I think my code is clearer, but I wouldn't go so far as to say I'm 
> violently opposed to your code.  I save violent opposition for really 
> important matters like which text editor you use.

+1 QOTW

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From lbates at syscononline.com  Wed Apr 13 08:20:50 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 13 Apr 2005 07:20:50 -0500
Subject: terminate exectutioin in PythonWin
In-Reply-To: <d3j265$ne6$1@scotsman.ed.ac.uk>
References: <d3j265$ne6$1@scotsman.ed.ac.uk>
Message-ID: <4u6dnQT8_ecAk8DfRVn-pA@comcast.com>

1) To exit any application:

import sys
sys.exit(0)

2) I'm not familiar with any of these development systems.  I use
what comes with ActiveState's PythonWin.  It does have debugging
breakpoints, etc.

Larry Bates

Jim wrote:
> Hi all
> 
> 1.Could someone tell me how to terminate execution in PythonWin?
> 
> 2.Can anyone recommend a free development environment in which you can
> save your workspace (e.g. open files, debugging breakpoints etc.)
> 
> Jim


From brian at sweetapp.com  Tue Apr 26 08:33:27 2005
From: brian at sweetapp.com (Brian Quinlan)
Date: Tue, 26 Apr 2005 14:33:27 +0200
Subject: Python documentation moronicities (continued)
In-Reply-To: <j0vr61dgok60f13cdgpamomerj7ickr7fh@4ax.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<mailman.1813.1113355346.1799.python-list@python.org>	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
	<j0vr61dgok60f13cdgpamomerj7ickr7fh@4ax.com>
Message-ID: <426E3517.6090301@sweetapp.com>

I think that there are some nice ideas in the new version e.g. "Regex 
functions" is a nicer title than "Module contents", examples, caveats.

But there are some organizational problems and the actual writting is a 
bit weak.

Cheers,
Brian


From steven.bethard at gmail.com  Wed Apr 13 11:17:11 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 09:17:11 -0600
Subject: preallocate list
In-Reply-To: <d3j6p7$ntl$1@scotsman.ed.ac.uk>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j6p7$ntl$1@scotsman.ed.ac.uk>
Message-ID: <GpSdndGkpZxpqsDfRVn-hw@comcast.com>

Jim wrote:
> Thanks for the suggestions. I guess I must ensure that this is my bottle 
> neck.
> <code>
>     def readFactorsIntoList(self,filename,numberLoads):
>     factors = []
>         f = open(self.basedir + filename,'r')
>         line = f.readline()
>         tokens = line.split()
>         columns = len(tokens)
>         if int(columns) == number:
>             for line in f:
>                 factor = []
>                 tokens = line.split()
>                 for i in tokens:
>                     factor.append(float(i))
>                 factors.append(loadFactor)
>         else:
>             for line  in f:
>                 tokens = line.split()
>                 factors.append([float(tokens[0])] * number)
>     return factors
> </code>
> 
> OK. I've just tried with 4 lines and the code works. With 11000 lines it 
> uses all CPU for at least 30 secs. There must be a better way.

Was your test on *just* this function?  Or were you doing something with 
the list produced by this function as well?

STeVe


From finite.automaton at gmail.com  Mon Apr 25 13:45:47 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 25 Apr 2005 10:45:47 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <1114451147.737426.207980@z14g2000cwz.googlegroups.com>

I expect you could combine the following with decorators as an easy way
to grab a function's locals just before it exits...  you could also use
exec or eval to execute code in the function's local namespace.
---------------------------------------

# Try it:

def trace_returns(frame, event, arg):
  if event == 'return':
    print "[frame locals just before return: %s]" % frame.f_locals
  return trace_returns

def foo(a, b):
  return a + b

import sys
sys.settrace(trace_returns)

foo(1,2)



From iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid  Fri Apr 15 19:18:16 2005
From: iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid (Maarten Sneep)
Date: Sat, 16 Apr 2005 01:18:16 +0200
Subject: trouble using \ to escape %
References: <1113606334.524947.54630@l41g2000cwc.googlegroups.com>
Message-ID: <42604bb8$0$152$e4fe514c@news.xs4all.nl>

In article <1113606334.524947.54630 at l41g2000cwc.googlegroups.com>,
 "Lucas Machado" <LMachado1 at gmail.com> wrote:

> I'm writing a python script that modifies the smb.conf file, and i need
> to write the characters '%U' in the file.  

print "%s = %%U" % "a" yields a = %U for me.

Maarten


From rbt at athop1.ath.vt.edu  Fri Apr 15 09:56:06 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 15 Apr 2005 09:56:06 -0400
Subject: Get OS name
In-Reply-To: <1113572595.889597.206690@g14g2000cwa.googlegroups.com>
References: <1113572595.889597.206690@g14g2000cwa.googlegroups.com>
Message-ID: <425FC7F6.8040405@athop1.ath.vt.edu>

codecraig wrote:
> How can I get the OS Name, such as "Windows XP Pro".  I know I can do
> 
> sys.getwindowsversion but that doesnt return a nice Windows XP Pro
> string.
> 
> and os.name gives "nt"
> 
> thanks.
> 

Read the docs... sys.getwindowsversion() should do the trick. AFAIK, 
there is no way to differentiate between XP Home and Pro unless you 
attempt to call an executable that's only available on Pro... such as 
"systeminfo". If that call fails, it's reasonably safe to assume that 
you're on a XP Home machine... especially if getwindowsversion() 
produces a major of 5 and a minor of 1

As everyone knows that XP is really just NT 5.1 ;)


From codecraig at gmail.com  Thu Apr 14 19:07:16 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 16:07:16 -0700
Subject: SimpleXMLRPCServer - disable output
In-Reply-To: <1113517877.473126.259590@o13g2000cwo.googlegroups.com>
References: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>
	<mailman.1930.1113511323.1799.python-list@python.org>
	<1113517877.473126.259590@o13g2000cwo.googlegroups.com>
Message-ID: <1113519297.207451.266090@g14g2000cwa.googlegroups.com>

Jeremy,
   Thanks for clearing that up.  I am so used to java (i.e.
foo.setLogRequests(0))...that I forgot I could just do, foo.logRequests
= 0.

   Learning one day at a time :)

Thanks.



From robin at reportlab.com  Fri Apr 29 05:33:28 2005
From: robin at reportlab.com (Robin Becker)
Date: Fri, 29 Apr 2005 10:33:28 +0100
Subject: regex over files
In-Reply-To: <d4smkl$7be$04$1@news.t-online.com>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>	<17008.19697.939514.53469@montanaro.dyndns.org>	<mailman.0.1114733851.14961.python-list@python.org>
	<d4smkl$7be$04$1@news.t-online.com>
Message-ID: <4271FF68.1050103@chamonix.reportlab.co.uk>

Peter Otten wrote:
> Robin Becker wrote:
> 
> 
>>#sscan1.py thanks to Skip
>>import sys, time, mmap, os, re
>>fn = sys.argv[1]
>>fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
>>s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
>>l=n=0
>>t0 = time.time()
>>for mat in re.split("XXXXX", s):
> 
> 
> re.split() returns a list, not a generator, and this list may consume a lot
> of memory.
> 
> 
>>n += 1
>>l += len(mat)
>>t1 = time.time()
>>
>>print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))
> 
> 
> I wrote a generator replacement for re.split(), but as you might expect, the
> performance is nowhere near re.split(). For your large data it might help
> somewhat because of its smaller memory footprint.
> 
> def splititer(regex, data):
>     # like re.split(), but never yields the separators.
>     if not hasattr(regex, "finditer"):
>         regex = re.compile(regex)
>     start = 0
>     for match in regex.finditer(data):
>         end, new_start = match.span()
>         yield data[start:end]
>         start = new_start
>     yield data[start:]
> 
> Peter

OK now the split scan times are much more comparable for 200Mb (which is what I 
have freely available according to taskmanager), but things start getting bad 
for 300Mb.

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=23.05

C:\code\reportlab\demos\gadflypaper>\tmp\sscan2.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=27.63

C:\code\reportlab\demos\gadflypaper>\tmp\sscan2.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=28.13

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=22.66

C:\code\reportlab\demos\gadflypaper>\tmp\sscan2.py xxx_300mb.dat
fn=xxx_300mb.dat n=5696206 l=271519105 time=45.45

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_300mb.dat
fn=xxx_300mb.dat n=5696206 l=271519105 time=32.14

C:\code\reportlab\demos\gadflypaper>\tmp\sscan0.py xxx_300mb.dat
fn=xxx_300mb.dat n=5696206 l=271519105 time=33.17

C:\code\reportlab\demos\gadflypaper>\tmp\sscan2.py xxx_300mb.dat
fn=xxx_300mb.dat n=5696206 l=271519105 time=45.27


here sscan0.py is Bengt's adaptive buffer splitter and sscan2.py is Peter's 
generator splitter.
C:\code\reportlab\demos\gadflypaper>cat \tmp\sscan0.py
import sys, time, re
fn = sys.argv[1]
rxo = re.compile('XXXXX')

def frxsplit(path, rxo, chunksize=4096):
     buffer = ''
     for chunk in iter((lambda f=open(path,'rb'): f.read(chunksize)),''):
         buffer += chunk
         pieces = rxo.split(buffer)
         for piece in pieces[:-1]: yield piece
         buffer = pieces[-1]
     yield buffer
l=n=0
t0 = time.time()
for mat in frxsplit(fn,rxo):
     n += 1
     l += len(mat)
t1 = time.time()

print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))


C:\code\reportlab\demos\gadflypaper>cat \tmp\sscan2.py
import sys, time, mmap, os, re
def splititer(regex, data):
     # like re.split(), but never yields the separators.
     if not hasattr(regex, "finditer"):
         regex = re.compile(regex)
     start = 0
     for match in regex.finditer(data):
         end, new_start = match.span()
         yield data[start:end]
         start = new_start
     yield data[start:]
fn = sys.argv[1]
fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
l=n=0
t0 = time.time()
for mat in splititer("XXXXX", s):
     n += 1
     l += len(mat)
t1 = time.time()

print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))



-- 
Robin Becker



From bvande at po-box.mcgill.ca  Sat Apr  2 15:30:13 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sat, 02 Apr 2005 15:30:13 -0500
Subject: testing -- what to do for testing code with behaviour dependant upon
 which files exist?
Message-ID: <424F00D5.9020205@po-box.mcgill.ca>

Hi all,

I'm just starting to employ unit testing (I'm using doctest), and I am
uncertain how to handle writing tests where the behaviour being tested 
is dependant on whether certain file paths point to actual files.

I have a class which takes, in its __init__, a list of file paths to
process. The class has a method to validate that the paths passed in
are appropriate ones for the class. One portion of the validation code
ensures that the passed in file paths actually exist.

The relevant part of the validation method code looks like:

     # self.universe_files is a list of file paths
     non_existent_files = [ x for x in self.universe_files if
                                        not os.path.isfile(x) ]
     if non_existent_files:
         raise Files_dont_existError, non_existent_files

where Files_dont_existError is a custom exception with an informative
error message nicely printing a listing of all the file paths which
didn't point to extant files.

I can test the custom error class just fine, but I don't see how to
test the validation method itself.

My problem is that I want to test how it behaves both when it is sent 
only existing file paths, and when it is sent at least 1 non-existent 
one. But it seems like that in order to test that, I have to know in 
advance details of what files exist on the system running the tests. 
And, it won't do to pick file paths with the right properties with 
respect to my computer, as I am writing this code to share with 
someone else, and so I'd have to know details of his file system, too. 
(If it matters, I am using Python 2.4.1 on windows, and I am sending 
the code to someone running Python 2.2 on Linux.)

So, how does one handle such cases with tests?

Thanks for any suggestions. Best,

Brian vdB




From martin at v.loewis.de  Wed Apr 27 02:07:54 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 27 Apr 2005 08:07:54 +0200
Subject: bytecode non-backcompatibility
In-Reply-To: <d4mc39$dl9$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org>
Message-ID: <426F2C3A.80402@v.loewis.de>

Maurice LING wrote:
> technicalities are wrong but situation remains unchanged.

For C modules, it is very likely that new versions of Python
will continue to break the ABI, by changing the layout of
structures.

The most straight-forward way to deal with it as a sysadmin
or user is to install multiple versions of Python on a single
machine. If Fink considers python2.4 as a replacement for
python2.3, then this is a flaw in Fink. In Debian, there is
a python package, which currently depends on python2.3.
Sometime in the future, it will depend on python2.4. Users
which update will then get python2.4, however, python2.3
will remain installed and usable, with all the extension
modules that were installed for it.

Regards,
Martin


From stuff at slinkp.com  Fri Apr 15 17:37:30 2005
From: stuff at slinkp.com (Paul Winkler)
Date: 15 Apr 2005 14:37:30 -0700
Subject: HTTPSConnection script fails, but only on some servers (long)
In-Reply-To: <mailman.1824.1113387514.1799.python-list@python.org>
References: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
	<d3ftlj$r3c$1@sea.gmane.org>
	<mailman.1824.1113387514.1799.python-list@python.org>
Message-ID: <1113601050.183792.326590@z14g2000cwz.googlegroups.com>

andreas at kostyrka.org wrote:
> In the meantime you should take a look a cURL and pycurl, which do
support
> all kind of more extreme HTTP (FTP, etc.) handling, like using https
over
> an proxy.

Well, I got a pycurl solution working very nicely in twenty minutes,
including the time it took to read the libcurl docs and

I still wish I understood the original problem better. I'd like to
file a bug report against HTTPSConnection, but I'm afraid that without
understanding the server config better it might just be noise in the
collector. Should I go ahead anyway?

Thanks everybody!

-PW



From gb at cs.unc.edu  Fri Apr 15 20:13:26 2005
From: gb at cs.unc.edu (Gary Bishop)
Date: 15 Apr 2005 20:13:26 -0400
Subject: IPython - problem with using US international keyboard
	input	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net> <du71x9ho29x.fsf@mozart.cc.tut.fi>
	<3c1qrjF6k3k4fU1@individual.net>
	<mailman.1771.1113322382.1799.python-list@python.org>
Message-ID: <426058a6_1@news.unc.edu>

Fernando Perez <fperez.net at gmail.com> wrote:
> Claudio Grondi wrote:

> > Considering what I found in the ipython mailing archives
> > and the fact, that after the fix with displaying colors on
> > bright backgrounds Gary had no time yet to get in touch
> > with me about the code I have sent him, I suppose, that
> > there will be no new releases addressing this problem
> > soon, right?

Folks, the code is OPEN SOURCE! It is right there at
SourceForge. Anyone, anywhere, at any time is free to hack it,
redistribute it, or ignore it.

It works FINE FOR ME as it is. Furthermore, I know NOTHING about
localization. Someone who NEEDS LOCALIZATION should FIX IT in a
general way.

Make your own version. Create a SourceForge project for it and you can
be the developer. I wouldn't even care if you removed my name from it.

I've received a patch or two for specific keyboards but I have no way
to test them and no time or inclination to fool with it.

The bottom line is, I write code for my own use. If others benefit
that is great. If it doesn't do what you want, make your own
version. If you want to distribute a new version, go for it.

gb





From andreis at stud.cs.uit.no  Mon Apr 18 05:32:15 2005
From: andreis at stud.cs.uit.no (=?UTF-8?B?QW5kcsOpIFPDuHJlbmc=?=)
Date: Mon, 18 Apr 2005 11:32:15 +0200
Subject: re module methods: flags(), pattern()
In-Reply-To: <1113750473.663610.172200@z14g2000cwz.googlegroups.com>
References: <1113750473.663610.172200@z14g2000cwz.googlegroups.com>
Message-ID: <d3vuqr$1fmf$1@news.uit.no>


A flag is just an int. From the re doc, you can see
there is a ignorecase flag:

"
I
IGNORECASE
     Perform case-insensitive matching; expressions like [A-Z] will 
match lowercase letters, too. This is not affected by the current locale.
"

Using the ignorecase flag:

 >>> import re
 >>> print re.I
2
 >>> print re.IGNORECASE
2
 >>> r = re.compile("hello", re.IGNORECASE)
 >>> print r.pattern
'hello'
 >>> match = r.search("heLLo")
 >>> match.group()
'heLLo'

As the doc says, you can combine several flags with the '|' operator:
r = re.compile("your_regexp", re.SOMEFLAG|re.SOMEOTHERFLAG)


Xah Lee wrote:
> Python re module has methods flags and pattern. How to use these
> exactly?
> 
> e.g. i tried
> 
> print patternObj.flags()
> 
> and the error is some "int object is not callable".
> 
> newpattern=re.compile(ur'\w+',patternObj.flags())
> 
> also bad.
> 
> similar error for patternObj.pattern(). (and i suppose the same for
> groupindex() )
> 
> thanks.
> 
>  Xah
>  xah at xahlee.org
> ? http://xahlee.org/
> 


From unknownsoldier93 at yahoo.com  Wed Apr  6 14:42:57 2005
From: unknownsoldier93 at yahoo.com (gf gf)
Date: Wed, 6 Apr 2005 11:42:57 -0700 (PDT)
Subject: Calling a Perl Module from Python ( future direction of Python)
In-Reply-To: <351e8871050406092449d4585b@mail.gmail.com>
Message-ID: <20050406184257.71587.qmail@web20707.mail.yahoo.com>

Really!  That's a pity... Instead of trying to
recreate a repository the size of CPAN, a Python
interface to Perl modules is really called for.

Instead of fretting over decorator syntax and
lispiness, might I suggest that development efforts be
directed to this?  Developers, are you listening? 
Guido?

PS And I don't mean waiting for Perl 6 to condense...

--- Swaroop C H <swaroopch at gmail.com> wrote:

> On Apr 6, 2005 8:23 AM, gf gf
> <unknownsoldier93 at yahoo.com> wrote:
> > I've recently made the switch.  Wow, is Python
> great!
> > One thing which I haven't been able to do is
> replace
> > Perl's great lib collection (HTML::Parser, for
> > instance, can do a lot that Soup just can't).
> 
> You've just discovered the only limitation of Python
> (in my view) - it
> doesn't have a module repository to rival CPAN.
> 
> AFAIK, there isn't any reliable way to call Perl
> modules from Python.
> 
> 
> -- 
> Swaroop C H
> Blog: http://www.swaroopch.info
> Book: http://www.byteofpython.info
> 



		
__________________________________ 
Yahoo! Messenger 
Show us what our next emoticon should look like. Join the fun. 
http://www.advision.webevents.yahoo.com/emoticontest


From radam2 at tampabay.rr.com  Sun Apr  3 18:31:43 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 22:31:43 GMT
Subject: Help me dig my way out of nested scoping
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
Message-ID: <qdp051lr4029bs8rhs3mj2pkd17d4fouit@4ax.com>

On 3 Apr 2005 14:12:48 -0700, "Brendan" <spam4bsimons at yahoo.ca> wrote:

>Hi everyone
>
>I'm new to Python, so forgive me if the solution to my question should
>have been obvious.  I have a function, call it F(x), which asks for two
>other functions as arguments, say A(x) and B(x).  A and B are most
>efficiently evaluated at once, since they share much of the same math,
>ie, A, B = AB(x), but F wants to call them independantly (it's part of
>a third party library, so I can't change this behaviour easily).   My
>solution is to define a wrapper function FW(x), with two nested
>functions,  AW(x) and BW(x), which only call AB(x) if x has changed.

You have several easy choices, that would not require you modifying
your program much.

1.  Use the 'global' keyword to declare lastX, aLastX, and bLastX as
globals, then all functions will have access to them.

def FW(x):
   global lastX, aLastX, bLastX

2.  Use function attributes, which are just names attached to the
function using a '.'.

def FW(x):
    #
	#  Function body here
    #
    return F(AW, BW)

FW.lastX = None
FW.aLastX = None
FW.bLastX = None

result = FW(x)


You will need to always include the FW. in front of those names. 


3. Something else, that may help is you can return more than one value
at a time. Python has this neat feature that you can have multiple
items on either side of the '=' sign.

a,b,c = 1,2,3
 
same as:
a=1
b=2
c=3

And it also works with return statements so you can return multiple
value.

def abc(n):
    return n+1, n+2, n+3
	
a,b,c = abc(0)


5.  Choice 5 and above is to rewrite your function as a class.  Names
in class's retain their values between calls and you can access those
values the same way as accessing function attributes.  


Hope this helped.

Cheers,
Ron


>To make this all clear, here is my (failed) attempt:
>
>#------begin code ---------
>
>from ThirdPartyLibrary import F
>from MyOtherModule import AB
>
>def FW(x):
>    lastX = None
>    aLastX = None
>    bLastX = None
>
>    def AW(x):
>        if x != lastX:
>            lastX = x
>            # ^ Here's the problem.  this doesn't actually
>            # change FW's lastX, but creates a new, local lastX
>
>            aLastX, bLastX = AB(x)
>        return aLastX
>
>    def BW(x):
>        if x != lastX:
>            lastX = x
>            # ^ Same problem
>
>            aLastX, bLastX = AB(x)
>        return bLastX
>
>    #finally, call the third party function and return its result
>    return F(AW, BW)
>
>#-------- end code ---------
>
>OK, here's my problem:  How do I best store and change lastX, A(lastX)
>and B(lastX) in FW's scope?  This seems like it should be easy, but I'm
>stuck.  Any help would be appreciated!
>
>  -Brendan



From t-meyer at ihug.co.nz  Tue Apr 12 20:21:11 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 13 Apr 2005 12:21:11 +1200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E80297B83D@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB007D@its-xchg4.massey.ac.nz>

[Nemesis]
> OK, so the python installer _does_ ship this dll. So also the 
> win installer has the redistribution problem, or does they 
> pay for redistributing msvcr71.dll? 

If you have a legal copy of one of the commercial MS compilers that includes
msvcr71.dll, you get the right to redistribute it.  Many of the python-dev
people have one of these, so one of their copies is being distributed
(exactly whose copy is academic, really).  The redistribution is subject to
various conditions, including getting the user to agree to a certain form of
EULA, which the 2.4 and 2.4.1 .msi installers do not do, so they breach the
EULA, yes.  All of this is pretty clear in the EULA, and has been said
before, here and on python-dev.

If anyone wanted to help out, and lessen the incredibly remote chance that
MS will take legal action against the 2.4 distribution, then I'm sure that
MvL would be happy to accept patches for the .msi so that an appropriate
"click-through" EULA was part of the installation.

=Tony.Meyer



From lpe at pycode.com  Fri Apr 29 09:30:19 2005
From: lpe at pycode.com (lpe)
Date: 29 Apr 2005 06:30:19 -0700
Subject: New Python website
In-Reply-To: <42719DFF.5080504@acm.org>
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
	<42719DFF.5080504@acm.org>
Message-ID: <1114781419.288939.30840@z14g2000cwz.googlegroups.com>

Hi maurice
thanks for your interest, that surely looks interesting (and promising)
I had no experience with any of the packages you mentioned, but it may
well be usefull.
Please email me with more details of what you had in mind.



From franz.steinhaeusler at utanet.at  Tue Apr  5 07:06:55 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Tue, 05 Apr 2005 13:06:55 +0200
Subject: Eric3 under WinXP
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
	<mailman.1366.1112689020.1799.python-list@python.org>
	<i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>
	<mailman.1370.1112692486.1799.python-list@python.org>
	<8to45154ueb3m8gfb0sj1v3ud24j5jnm7d@4ax.com>
	<mailman.1373.1112697815.1799.python-list@python.org>
Message-ID: <01s4519rja95bv769poj5c6ohi34vlvtpj@4ax.com>

On Tue, 5 Apr 2005 11:43:38 +0100 (BST), "Phil Thompson"
<phil at riverbankcomputing.co.uk> wrote:

>>[...]
>> Or doesn't it fit with "Qt 3.3.4 Evaluation"
>>
>> Any hints?
>
>What version of Python do you have installed? The binary is built against
>v2.4.
>
Oh sorry, I think, there was a mix between Python2.3 and Python2.4
somewhere in the registry.
(it took the .pyd files from Python23 directory).
I don't understand exactly (replaced some Python23 with
Python24 with regedit), and, cool, it is working
(also with eric (before I had installed 3.5.1 (there 
was an error), and now with eric 3.6.2), all is fine.

thank you very much


>BTW, your email address is bouncing messages.
>

Hm, sorry, I don't understand, what you mean.

>Phil

best regards

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From forodejazz at gmail.com  Thu Apr 14 08:08:18 2005
From: forodejazz at gmail.com (David Asorey ?lvarez)
Date: 14 Apr 2005 05:08:18 -0700
Subject: templating system
References: <mailman.1644.1113148510.1799.python-list@python.org>
Message-ID: <c8dcf76f.0504140408.105ea5ba@posting.google.com>

Ksenia Marasanova <ksenia.marasanova at gmail.com> wrote in message news:<mailman.1644.1113148510.1799.python-list at python.org>...
> Hi,
> 
> I am looking for fast, simple templating system that will allow me to
> do the following:
> - embed Python code (or some templating code) in the template
> - generate text output (not only XML/HTML)
> 
> I don't need a framework (already have it), but just simple
> templating. The syntax I had in mind is something like that:
> ...

Have you tried cherrytemplate?. It is designed for using with
cherrypy, but it can be easily used alone.

http://cherrytemplate.python-hosting.com/

-- 
David.


From jstroud at mbi.ucla.edu  Tue Apr  5 23:57:37 2005
From: jstroud at mbi.ucla.edu (jstroud at mbi.ucla.edu)
Date: Tue, 5 Apr 2005 20:57:37 -0700 (PDT)
Subject: Best editor?
Message-ID: <33880.128.97.39.105.1112759857.squirrel@www.doe-mbi.ucla.edu>

On Tuesday 05 April 2005 11:22 am, ChinStrap wrote:
> I keep hearing everyone say Emacs, but I can't understand it at all.

Both emacs and vi suffer from the fact that they can not be used by ordinary
humans. Thus, I recommend using either to impress your friends.

James


From fred.dixon at gmail.com  Wed Apr 13 20:04:32 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 13 Apr 2005 17:04:32 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
Message-ID: <1113434483.437663.206030@f14g2000cwb.googlegroups.com>

this is what i am using to test with.
my program is not much more involved just longer
and with a GUI.
I did test it and everything works, just wondered if there was
something evil and bad about importing main.
#------------------------------------------------
 #global1.py
import global2
import global3
import sys

constant = 'dumb'
option = sys.argv[1:]
pass
#global2.func1()
a=global2.class1()
a.func1()
print newvar


#global2.py
import __main__
pass
class class1:
    def func1(self):
        __main__.newvar = "string"
        pass



From rschroev_nospam_ml at fastmail.fm  Tue Apr 26 04:35:01 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 26 Apr 2005 08:35:01 GMT
Subject: what is the best way to determine system OS?
In-Reply-To: <1114487173.272526.13670@o13g2000cwo.googlegroups.com>
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org> <hpivj2-lh1.ln1@lairds.us>
	<86y8b6o8pw.fsf@guru.mired.org>
	<1114487173.272526.13670@o13g2000cwo.googlegroups.com>
Message-ID: <V2nbe.73933$xJ7.4988028@phobos.telenet-ops.be>

googleboy wrote:

> What this script does is use take the output of vmstat to report idle
> cpu cycles (or memory stuff, etc.) over a period specified by a
> parameter,  all the better to be a plugin for a monitoring service.
> 
> Basically it parses the output of the command,  runs through a whole
> bunch of regex to discard everything not required and then reports the
> info.  Everything I had checked out that responded "Linux" to a uname
> command had identical output for vmstat until FC3.   FC3 seems to use
> similar output to BSD.   I wrote a simple if-then loop to try to
> determine which regex function to use, but it obivously isn't working
> under fc3.

In that case, it seems to be a better idea to check the version of 
vmstat that's on the system. At least, I presume that such differences 
in behaviour can be deduced from the vmstat version string.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From chrispatton at gmail.com  Fri Apr 15 00:44:48 2005
From: chrispatton at gmail.com (chris patton)
Date: 14 Apr 2005 21:44:48 -0700
Subject: question about functions
Message-ID: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>

Hi everyone.

I have a question about passing arguments to python functions. Is there
any way to make this job act like Perl?

sub my_funk {

print "the first argument: $_[0]\n";
print "the second argument: $_[1]\n";  }

In other words, can I call the arguments from a list?



From artiegold at austin.rr.com  Sat Apr  2 02:42:50 2005
From: artiegold at austin.rr.com (Artie Gold)
Date: Sat, 02 Apr 2005 01:42:50 -0600
Subject: Simple thread-safe counter?
In-Reply-To: <mailman.1224.1112418208.1799.python-list@python.org>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
Message-ID: <3b70ntF6fd45tU1@individual.net>

Skip Montanaro wrote:
>     Paul> I'd like to have a function (or other callable object) that
>     Paul> returns 0, 1, 2, etc. on repeated calls.
>     ...
>     Paul> There should never be any possibility of any number getting
>     Paul> returned twice, or getting skipped over, even if f is being called
>     Paul> from multiple threads.
> 
> How about (untested):
> 
>     import Queue
> 
>     counter = Queue.Queue()
>     counter.put(0)
>     def f():
>         i = counter.get()
I think you need:
           i = counter.get(True)
for this to work; otherwise a race condition would raise an exception.
>         counter.put(i+1)
>         return i

[snip]

This is, of course dependent upon counter.get() being guaranteed to be 
thread safe. (I haven't found anything in the docs specifically relating 
to that. Perhaps it's implicit?)

Thanks,
--ag

-- 
Artie Gold -- Austin, Texas
http://it-matters.blogspot.com (new post 12/5)
http://www.cafepress.com/goldsays


From jarrod.roberson at gmail.com  Wed Apr 20 19:42:52 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 20 Apr 2005 16:42:52 -0700
Subject: Faster os.walk()
In-Reply-To: <42668b84_3@newspeer2.tds.net>
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
	<mailman.2181.1114012135.1799.python-list@python.org>
	<dqCdneACDr5-5vvfRVn-tA@powergate.ca>
	<1114016094.531694.117130@z14g2000cwz.googlegroups.com>
	<42668b84_3@newspeer2.tds.net>
Message-ID: <1114040572.953141.266090@g14g2000cwa.googlegroups.com>

ding, ding, ding, we have a winner.

One of the guys on the team did just this, he re-implemented the
os.walk() logic and embedded the logic to the S_IFDIR, S_IFMT and
S_IFREG directly into the transversal code.

This is all going to run on unix or linux machines in production so
this is not a big deal.
All in all we went from 64+k function calls for 7070 files/dirs to 1
PER dir/file.

the new code is just a little bit more than twice as fast.

Huge improvement!



From rdm at rcblue.com  Thu Apr 14 00:23:34 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 21:23:34 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <see-414FAA.23143013042005@news.frontiernet.net>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
	<see-414FAA.23143013042005@news.frontiernet.net>
Message-ID: <6.2.1.2.2.20050413212105.03b3deb0@rcblue.com>

Doug Schwarz wrote at 20:14 4/13/2005:
>In article <mailman.1865.1113441561.1799.python-list at python.org>,
>  Dick Moores <rdm at rcblue.com> wrote:
>
> > Dan wrote at 18:02 4/13/2005:
> > >On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
> > >wrote:
> > >
> > > > I'm just trying to help an artist acquaintance who needs (I just
> > > >learned) the first 3003 digits of pi to the base 12.
> > >
> > >Now you've got me curious.  Why would an artist want the first 3003
> > >digits of pi to the base 12?
> >
> > He says,
> > Do you know how I can get "base12 pi"?
> > Because the chromatic scale is base12.
> > c c# d d# e f f# g g# a a# b
> >
> > Dick
>
>Does your artist friend have any idea what base 12 means?
>
>The chromatic scale is based on one twelfth powers of two, i.e., if the
>frequency of a note in the scale is f(n), then the frequency of the next
>note is given by
>
>   f(n+1) = f(n) * 2^(1/12)
>
>so by the time you go all 12 notes in an octave you have doubled the
>frequency.  There is nothing here involving base 12 or pi.

He's a friend of a friend. I don't know what he knows, but I'll forward 
this to MY friend. Thanks.

Dick


>--
>Doug Schwarz
>dmschwarz&urgrad,rochester,edu
>Make obvious changes to get real email address.
>--
>http://mail.python.org/mailman/listinfo/python-list



From ivanlan at pauahtun.org  Thu Apr 14 11:12:38 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Thu, 14 Apr 2005 09:12:38 -0600
Subject: Converting a perl module to a python module would it be worthit?
References: <425e7c41$1@usenet.ugs.com>
	<425e8494$0$10741$626a14ce@news.free.fr>
Message-ID: <425E8866.A3BB7AF7@pauahtun.org>

Hi All--

bruno modulix wrote:
> 
> Mothra wrote:
> > Hi All,
> >
> > I am the current author of the Astro-Sunrise perl module
> > http://search.cpan.org/~rkhill/Astro-Sunrise-0.91/Sunrise.pm
> > and was wondering if it would be worth while to convert it to python.
> 
> Only you and your module's users may tell...
> 

I'd use it.

> > First off, I have never programmed in python. I would like to use
> > this project to learn python.
> 
> Well, this might be an answer to your first question !-)
> 

If you can get your mind off the @#)*&^@#!!&-ing Perl syntax, you'll be
fine;-)

> > Another question is, if I do this where can I put the results?
> > As far as I know python has no "CPAN".
> http://www.python.org/pypi/
> 

They're working on the Python version of CPAN, but it's taking a long
time.  I think they started in 1998 or so?  Haven't kept up, so I have
no idea what's taking so long.  I'm sure someone more knowledgeable than
me will come along and set us straight.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From rkern at ucsd.edu  Sun Apr 24 01:53:53 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 23 Apr 2005 22:53:53 -0700
Subject: Variables
In-Reply-To: <426B27C1.4000907@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b255d.375304108@news.oz.net>
	<426B27C1.4000907@cloudthunder.com>
Message-ID: <d4fc0g$jar$1@sea.gmane.org>

Richard Blackwood wrote:
> Bengt Richter wrote:
> 
>> On Sat, 23 Apr 2005 22:45:14 -0400, Richard Blackwood 
>> <richardblackwood at cloudthunder.com> wrote:
>>
>>  
>>
>>> Robert Kern wrote:
>>>
>>>   
>>>
>>>> Richard Blackwood wrote:
>>>>
>>>>     
>>>>
>>>>> To All:
>>>>>
>>>>>   Folks, I need your help. I have a friend who claims that if I write:
>>>>>
>>>>> foo = 5
>>>>>
>>>>> then foo is NOT a variable, necessarily. If you guys can define for 
>>>>> me what a variable is and what qualifications you have to back you, 
>>>>> I can pass this along to, hopefully, convince him that foo is 
>>>>> indeed a variable.
>>>>>       
>>>>
>>>> None of us can do that unless you tell us what he thinks the word 
>>>> "variable" means. The terminology is a bit fluid. I suspect that 
>>>> your friend applying a somewhat restricted notion of "variable" that 
>>>> coincides with the behavior of variables in some other language.
>>>>
>>>>     
>>>
>>> Indeed, this language is math. My friend says that foo is a constant 
>>> and necessarily not a variable. If I had written foo = raw_input(), 
>>> he would say that foo is a variable. Which is perfectly fine except 
>>> that he insists that since programming came from math, the concept of 
>>> variable is necessarily the identical. This can not be true. For 
>>> example, I may define foo as being a dictionary, but I can not do 
>>> this within math because there is no concept of dictionaries within 
>>> mathematics; yet foo is a variable, a name bound to a value which can 
>>> change.
>>>   
>>
>>
>> Maybe he doesn't know that foo = 5 in Python is not an equation as in 
>> math,
>> but a Python source language statement to be translated to a step in some
>> processing sequence.
>>
>> Tell him in Python foo is a member of one set and 5 is a member of 
>> another,
>> and foo = 5 expresses the step of putting them into correspondence
>> to define a mapping, not declaring them equal.
>>  
>>
> Could I honestly argue this to him? From what basis do I argue that it 
> is not an equation?

It's his responsibility to show that it *is* an equation.

x = x + 1

Equation? I think not.

> In any event, he would likely (passionately) 
> disagree considering his notion that programming is an off-shoot of math 
> and thus at the fundamental level has identical concepts and rules. 
> Believe it or not, he used to be a programmer. Back in the day (while I 
> was getting my PhD in philosophy), he was a employed programmer using 
> Cobol, Fortran, and other languages like that.

Okay, I take back my comment that this is not his field. I instead put 
forth the contention that he is a stark raving nutter. My qualifications 
to back me are that I cut my USENET teeth at talk.origins. I know my 
stark raving nutters.

> Did his seemingly 
> peculiar definition of variable exist at that time?

Oh, I'm sure *some* programming textbook from that time has tried to use 
such a definition and maintained the assertion that "programming is an 
off-shoot of math and thus at the fundamental level has identical 
concepts and rules." Both are rather naive, though, and the rest of the 
field has grown out of it. Your friend hasn't, it seems. Leave him to 
it, I say.

If you insist on convincing him, however, you can point him to Raphael 
Finkel's _Advanced Programming Language Design_[1], page 5 which defines 
"variables" as "named memory locations." In this formal context, what we 
often informally call "variables" in Python aren't. This is why we 
sometimes use the term "names" instead. In C, when I declare a variable, 
I also specify a piece of memory to which that name refers. When I 
assign a value to that variable, the value goes into that memory 
location. When I assign a new value there, I overwrite the data in that 
memory location with the new value. It doesn't work like that in Python. 
The name just points to the new object. No memory gets overwritten. Your 
friends other assertions suggest that this is not what he is talking 
about, though.

As always in terminology issues, what is correct depends on the 
conversation one is having. If I'm talking about a piece of Python code 
a colleague and I say, "so I put the value in a temporary variable--" 
and he says "No, it's not a variable, it's a name!", he has just 
volunteered for a severe beating. If I'm talking about comparative 
language design like Finkel is, the distinction is quite useful and no 
beatings need occur.

None of this has anything to do with the terminology as it is used in 
mathematics.

[1] http://www.nondot.org/sabre/Mirrored/AdvProgLangDesign/

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From martin at v.loewis.de  Sun Apr 10 04:37:57 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 10 Apr 2005 10:37:57 +0200
Subject: Thoughts on some stdlib modules
In-Reply-To: <1113120099.217977.192190@g14g2000cwa.googlegroups.com>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<4257BE8B.9080209@v.loewis.de>
	<1113120099.217977.192190@g14g2000cwa.googlegroups.com>
Message-ID: <4258e5e6$0$3407$9b622d9e@news.freenet.de>

Kay Schluehr wrote:
> I slightly disagree. It's a symptom. The example of the path-module is
> instructive because it actually represents path objects not just a
> bunch of functions in isolation that manipulate strings that can be
> interpreted as paths. I started to read in the lib.py documentation of
> pypy and again I found the reference to the path-module. Different
> people seem to share similar ideas and claim about inconveniencies. I
> use the path-module by myself for a year. This indicates that there is
> something wrong or missing in the std-library.  

I personally find the notion of "path objects" confusing. Is this a
real path name on the local system, or merely a potential one? If
potential, why does it have a .size attribute (what is the size of
a non-existing file)? If real, how do I construct the name of a new
file?

What about relative paths? It says they are relative to the current
directory. Do I never need paths relative to some other directory?
What about the notion of "current drive" that Windows has?

That said, if the people who want a path object would get together
and contribute one, the library could be extended. I don't know
whether this would be an improvement, though - os.path could not
go away for backwards compatibility, so users would now have *two*
ways of dealing with path names.

I also think that one of the reasons why there isn't a path object
in the standard library yet is that nobody who has written one in
the past trusts his own code enough to make it "official". Jason
Orendorff writes "I find it a joy to use, and I hope you will too."
This is the standard open source attitude (and rightly so): if
you don't like it, don't use it. This attitude could not be
preserved anymore if this would be in the standard library (or
else we would not have this discussion).

For a number of libraries added recently, I heard lots of complaints
how terrible they are to use, including, in particular, the XML
and logging libraries, and the Unicode type, and that "something
else" is so much easier to use. Why is it that the authors of
"something else" never contribute it to Python?

Regards,
Martin


From james at wrong.nu  Sun Apr 24 22:04:22 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Mon, 25 Apr 2005 03:04:22 +0100
Subject: Parsing data from URL
In-Reply-To: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>
References: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>
Message-ID: <200504250304.33568.james@wrong.nu>

On Monday 25 April 2005 01:24, Harlin Seritt wrote:

> dat = urllib.urlopen(url, 'r').read()

Drop the 'r' - urlopen is posting the 'r' to the server, instead of doing what 
you mean, opening the file read-only.
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From simon.brunning at gmail.com  Tue Apr 12 11:51:38 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 12 Apr 2005 16:51:38 +0100
Subject: Better access to database search results
In-Reply-To: <425BEA2A.6020302@mediapulse.com>
References: <425BEA2A.6020302@mediapulse.com>
Message-ID: <8c7f10c60504120851224736e2@mail.gmail.com>

On Apr 12, 2005 4:32 PM, Gabriel Cooper <gabriel.cooper at mediapulse.com> wrote:
> Usually when I access db search results it's something like this:
> 
> cursor.execute("select A1,A2,A3,A4 from B where C")
> for (a1,a2,a3,a4) in cursor.fetchall():
>     stuff()
> 
> But sometimes the point at which I use the data returned is not with the
> search, and so having the ability to access the results as a dictionary
> is more useful.
>
> Let me know what you think. Could this be done simpler?

Have you come across dtuple?
(<http://www.lyra.org/greg/python/dtuple.py>). It's really easy to use
- <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81252>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From Dennis.Benzinger at gmx.net  Wed Apr 13 15:59:04 2005
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Wed, 13 Apr 2005 21:59:04 +0200
Subject: build flow? SCons? AAP? process creation?
In-Reply-To: <1113420994.118316.245190@g14g2000cwa.googlegroups.com>
References: <1113420994.118316.245190@g14g2000cwa.googlegroups.com>
Message-ID: <425d7a08$1@news.uni-ulm.de>

corey.coughlin at comcast.net schrieb:
> [...]
> So if I do wind up having to write this thing myself, I've been
> checking the docs on process creation, and have a couple questions if
> anyone can fill me in.  It looks like the os.spawn* commands can start
> nonblocking sub-processes, but there doesn't seem to be a way to get
> stdout and stderr.  On the other hand, the popen commands make it easy
> to trap stdout and stderr, but I guess I'd have to do the thread setup
> and spawning myself.  Is there another alternative that I'm missing
> here?  
> [...]

Yes, you are missing the subprocess module which was introduced in 
Python 2.4: http://docs.python.org/lib/module-subprocess.html

Bye,
Dennis


From peter at engcorp.com  Tue Apr 26 10:19:25 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 26 Apr 2005 10:19:25 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <mailman.2503.1114488322.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<mailman.1813.1113355346.1799.python-list@python.org>	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>	<d4jec2$20g$1@sea.gmane.org>	<mailman.2485.1114456610.1799.python-list@python.org>	<1114477978.067147.293900@z14g2000cwz.googlegroups.com>
	<mailman.2503.1114488322.1799.python-list@python.org>
Message-ID: <iK2dnRu0t_5S0PPfRVn-iQ@powergate.ca>

Steve Holden wrote:
> I still await the specified five emails preferring your version to the 
> current documentation.

So, for the record Steve, how many of those emails have you
received to date?  (And how many from *anyone*, not just
regulars, proclaiming Xah's version better?)

-Peter


From mikael at isy.liu.se  Thu Apr 14 03:19:28 2005
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Thu, 14 Apr 2005 09:19:28 +0200
Subject: Printable version of Python tutorila
References: <1113462420.862936.132780@g14g2000cwa.googlegroups.com>
Message-ID: <012101c540c2$4b9a8ca0$4334ec82@guinevere>


<sandygarg at gmail.com> wrote:
>I liked the python tutorial (
> http://www.python.org/doc/current/tut/tut.html ) very much.
> Now i want to print this tutorial.
> Where do i get a printable version of the document?

http://www.python.org/doc/current/download.html

Regards
/Mikael Olofsson
Universitetslektor (Senior Lecturer [BrE], Associate Professor [AmE])
Link?pings universitet

-----------------------------------------------------------------------
E-Mail:  mikael at isy.liu.se
WWW:     http://www.dtr.isy.liu.se/en/staff/mikael
Phone:   +46 - (0)13 - 28 1343
Telefax: +46 - (0)13 - 28 1339
-----------------------------------------------------------------------
Link?pings kammark?r: www.kammarkoren.com   Vi s?ker tenorer och basar! 



From mwm at mired.org  Fri Apr 22 18:51:38 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 17:51:38 -0500
Subject: trying to read from dying disk
References: <1114195387.535143.76860@o13g2000cwo.googlegroups.com>
Message-ID: <86fyxis9vp.fsf@guru.mired.org>

jdh2358 at gmail.com writes:

> I have a python file that is trying to read raw data from a raw
> partition on a dying dist, eg
>
>   f = file('/dev/sda')
>   f.seek(SOMEWHERE)
>   s = f.read(SOMEBYTES)
>
> On some blocks, the read succeeds, on others it fails and an IOError is
> thrown, and on others it appears to hang indefinitely and will not
> respond to any attempt to kill it with 'kill -9 PID', etc.
>
> Is there anyway to do a timeout read on this kind of file, or even to
> kill the process once it hangs?
>
> linux kernel 2.6.10
> python 2.4.1

Don't do this in Python. Dealing with flaky hardware is a maintenance
problem, and applications should report the error, and either exit or
proceed as best as possible after the error.

Use the "dd" command to extract as much good data as you can from the
failing disk.

Ok, if you *really* want to do this in Python, the answer is - you
need to provide more information. For instance, *where* does the
process hang? It's possible you've hung the process in an
uninterruptible state in the kernel. If so, you're screwed. You need
to find out where the process hangs (kernel, libc, python, etc.), and
if in the kernel what it's waiting on. In the latter case, you need to
ask on a Linux list.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From Ron  Fri Apr 22 12:38:02 2005
From: Ron (Ron)
Date: 22 Apr 2005 11:38:02 -0500
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_yo?=
 =?iso-8859-1?q?ur_location=2E_I_want_to_ask_you_the_most_important_questi?=
 =?iso-8859-1?q?on_of_your_life=2E_Your_joy_or_sorrow_for_all_eternity_dep?=
 =?iso-8859-1?q?ends_upon_your_answer=2E_The_question_is=3A_Are_you_saved?=
 =?iso-8859-1?q?=3F_It_is_not_a_question_of_how_good_you_are=2C_nor_if_you?=
 =?iso-8859-1?q?_are_a_church_member=2C_but_are_you_saved=3F_Are_you_sure_?=
 =?iso-8859-1?q?you_will_go_to_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP?=
 =?iso-8859-1?q?=B7POST=B7147?=
References: <1114186957.814776.238490@z14g2000cwz.googlegroups.com>
Message-ID: <lo9i6190r1fv2qlso1edictmvh14fa5frl@4ax.com>

Reports to groups-abuse at google.com, abuse at aol.net, domains at aol.net,
abuse at yahoo.com, abuse at yahoo-inc.com

And do not feed the troll!


From programmer.py at gmail.com  Wed Apr 20 08:27:28 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Wed, 20 Apr 2005 07:27:28 -0500
Subject: Python Debugger with source code tracking ability
In-Reply-To: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
References: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
Message-ID: <d52c72d205042005272e426006@mail.gmail.com>

I haven't tried the customizations listed at the site below.  If it
works, let me know.

http://page.sourceforge.net/tricks.html

jw

On 19 Apr 2005 19:45:05 -0700, Tran Tuan Anh <anhtt at hotmail.com> wrote:
> Hi all,
> 
> I am new to Python and desperated to look for a good Python debugger.
> I mean a debugger with source coding tracking. For C/C++, emacs and
> gud offers execellent development env. The source code tracking is
> extremely useful for recursive functions.
> 
> I have spent time Googling but not found anything near.
> 
> Thanks!
> Tuan-Anh
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From frithiof.jensen at die_spammer_die.ericsson.com  Wed Apr 13 04:31:02 2005
From: frithiof.jensen at die_spammer_die.ericsson.com (Frithiof Andreas Jensen)
Date: Wed, 13 Apr 2005 10:31:02 +0200
Subject: Looking for a very specific type of embedded GUI kit
References: <Xns963695069E82Esizernospamcom@216.40.28.87>
Message-ID: <d3il2l$103$1@newstree.wise.edt.ericsson.se>


"Sizer" <sizer at nospam.com> wrote in message
news:Xns963695069E82Esizernospamcom at 216.40.28.87...

> So the question is: what non-X gui toolkit can we use that has Python
> bindings and will let us use a custom display driver at the lowest level?

There is a discussion of Embedded X's here:

http://www.linuxdevices.com/files/elec-oct00/anderson/img0.html (metrolink
seem's to be dead).

http://www.microwindows.org/

maybe sourceforge knows more?





From gerryandsharon at sympatico.ca  Fri Apr 15 23:55:41 2005
From: gerryandsharon at sympatico.ca (Gerry Sutton)
Date: Fri, 15 Apr 2005 23:55:41 -0400
Subject: Problem when subclass instance changes base class instance variable
Message-ID: <5108e.6766$MZ2.990611@news20.bellglobal.com>

Hi All!

I have noticed a strange behavior when using a constant identifier to 
initialize an instance list variable in a base class and then trying to 
modifying the list in subclasses by using either the list.extend method or 
even by having the subclass create a whole new list in the variable.

The following example illustrates the situation.



Lbase = ['Initial Base Data']

LSub1 = ['SubClass 1 data']

LSub2 = ['SubClass 2 data']



##

class BaseClass:



def __init__(self):

   self.data = Lbase                 #<----  this fails??

#  self.data = ['Initial Base Data'] #<----  this works

   def printData(self):

   print self.data



##

class SubClass1(BaseClass):



  def __init__(self):

   BaseClass.__init__(self)

   self.data.extend(LSub1)

# self.data += LSub1



##

class SubClass2(BaseClass):



  def __init__(self):

    BaseClass.__init__(self)

    self.data.extend(LSub2)

#   self.data += LSub2



s1 = SubClass1()

s1.printData()



s2 = SubClass2()

s2.printData()



s11 = SubClass1()

s11.printData()



s21 = SubClass2()

s21.printData()

s1.printData()



>>>

['Initial Base Data', 'SubClass 1 data']

['Initial Base Data', 'SubClass 1 data', 'SubClass 2 data']

['Initial Base Data', 'SubClass 1 data', 'SubClass 2 data', 'SubClass 1 
data']

['Initial Base Data', 'SubClass 1 data', 'SubClass 2 data', 'SubClass 1 
data', 'SubClass 2 data']

['Initial Base Data', 'SubClass 1 data', 'SubClass 2 data', 'SubClass 1 
data', 'SubClass 2 data']

>>>

It looks like the instance variable is acting like a class variable with all 
the subclass changes accumulating as more objects are created.

Does anyone have an explanation for this behavior?

Are other mutable sequence types affected the same way?

To fix the problem you simply use a literal list to initialize the variable 
in the base class instead of an identifier.

This problem does not exist if the data variable is a string, maybe because 
it is immutable?

I am using Python Ver 2.3.

Does this code behave the same way in 2.4,








From sdhyok at gmail.com  Sat Apr 30 17:26:05 2005
From: sdhyok at gmail.com (sdhyok)
Date: 30 Apr 2005 14:26:05 -0700
Subject: How to track down all required shared libraries?
Message-ID: <1114896365.287665.126130@o13g2000cwo.googlegroups.com>

Recently, I installed many shared libraries to run a program written in
Python.
Now, I am in the situation to run the same program but on several
different machines with the same Linux OS. To avoid the reinstallation,
I like to pack up all shared libraries into a directory. Is there a
good way to track down all shared libraries required to run a Python
program?

Daehyok Shin



From thn at mail.utexas.edu  Thu Apr 14 20:33:42 2005
From: thn at mail.utexas.edu (Thomas Nelson)
Date: Thu, 14 Apr 2005 19:33:42 -0500
Subject: new to mac OS10
In-Reply-To: <d3n0uo$ohl$1@domitilla.aioe.org>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
	<d3n0uo$ohl$1@domitilla.aioe.org>
Message-ID: <d3n25g$rih$1@geraldo.cc.utexas.edu>

Maurice LING wrote:
> 
> I'm using OSX 10.3.8 as well. Just wondering, how did you "destroy" it? 
> What I am thinking is, it may not be as destroyed as you think it might 
> have...
> 
> cheers
> maurice

I was actually trying to update to the newest python version, and I had 
read something saying it would conflict with the old version, so I went 
through and deleted all the folders that had "python" in the name =]. 
clever of me, huh?  now I can't make either the new or the old work. 
Once again, any help would be terrific.

THN


From sw at wordtech-software.com  Sat Apr 16 14:08:37 2005
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 16 Apr 2005 14:08:37 -0400
Subject: new to mac OS10
In-Reply-To: <d3ojjf$n11$1@geraldo.cc.utexas.edu>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>
	<d3ojjf$n11$1@geraldo.cc.utexas.edu>
Message-ID: <426154A5.5000108@wordtech-software.com>

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

It's *not* a good idea to delete Apple's system Python. You will
probably need to reinstall the OS.

In addition to the mailing list that someone else posted (which is a
great resource!), here's a good site to check out:

http://pythonmac.org/

The site maintainer, Bob Ippolito, is one of the main developers of
Python on the Mac and maintains a lot of packages. This site also
includes lots of links to information.

Hope that helps,
Kevin

Thomas Nelson wrote:
| The main thing I would like is to be able to use tkinter with python on
| my mac.  will the command-line-style source allow this?  Does it come
| with IDLE?  How is the fink version different from the source i can
| download at python.org?  Here's the result of the requested commands on
| my Terminal.  It would appear that these links are broken, as
| Python.framework no longer exists.  Sorry to be so much trouble,
|
| THN
|
|
|
| Welcome to Darwin!
| ~ $ ls -all /usr/bin/python*
| lrwxr-xr-x  1 root  wheel    9 20 Jun  2004 /usr/bin/python -> python2.3
| lrwxr-xr-x  1 root  wheel   72 20 Jun  2004 /usr/bin/python2.3 ->
| ../../System/Library/Frameworks/Python.framework/Versions/2.3/bin/python
| lrwxr-xr-x  1 root  wheel   10 20 Jun  2004 /usr/bin/pythonw -> pythonw2.3
| -rwxr-xr-x  1 root  wheel  122  8 Jun  2003 /usr/bin/pythonw2.3
| ~ $ ls /System/Library/Framework/Python.framework
| ls: /System/Library/Framework/Python.framework: No such file or directory
| ~ $ cd /System/Library/Framework/Python.framwork
| -bash: cd: /System/Library/Framework/Python.framwork: No such file or
| directory
| ~ $
|
|
| Jorl Shefner wrote:
|
|> If you simply want the latest python to run from the command line, then
|> compiling the source code works fine on the mac.  I just installed
|> 2.4.1 on Os 10.3.8 last week without any problems.
|>
|> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz
|>
|> "./configure"
|> "make"
|> "make install"
|>
|> J.S.
|>


- --
Cheers,

Kevin Walzer, PhD
WordTech Software--Open Source Applications and Packages for OS X
http://www.wordtech-software.com
http://www.smallbizmac.com
http://www.kevin-walzer.com
mailto:sw at wordtech-software.com
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Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

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From __peter__ at web.de  Wed Apr 20 16:32:04 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 20 Apr 2005 22:32:04 +0200
Subject: What's the difference between these 2 statements?
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
	<1114026007.999930.12850@f14g2000cwb.googlegroups.com>
	<d46bvt$2l9$01$1@news.t-online.com>
	<4266b7cf$0$7202$626a14ce@news.free.fr>
Message-ID: <d46e7k$ef4$05$1@news.t-online.com>

tiissa wrote:

> Peter Otten wrote:
>> ahmedt at gmail.com wrote:
>> 
>> 
>>>so if I want to reverse it fully using s[len(s)-1:x:-1] what would x be
>>>or is it impossible to express it in this way ?
>> 
>> 
>> This does not work for integers, because the theoretically correct value
>> x = -1 already has another interpretation as the gap between the last and
>> the last but one character.
> AFAIK, it is not an issue of integer (what else can an slice index be in
> python?) but simply of index aliasing.
> 
> For x=-len(s)-1, you get the whole reversed list:
> 
> In [5]: s[len(s)-1:-len(s)-1:-1]
> Out[5]: '54321'

Clever. I didn't think of that.
Still, for practical purposes you have to test for slicelen >= stringlen, so
whether you choose None, -len(s)-1, or -sys.maxint as the second slice
parameter doesn't matter much.

Peter



From me at privacy.net  Sat Apr  9 12:39:48 2005
From: me at privacy.net (Dan Sommers)
Date: 09 Apr 2005 12:39:48 -0400
Subject: Are circular dependencies possible in Python?
References: <IEosBE.GtB@bath.ac.uk>
Message-ID: <m2is2vrjjf.fsf@unique.fully.qualified.domain.name.yeah.right>

On Sat, 9 Apr 2005 15:57:15 GMT,
Tim Tyler <tim at tt1lock.org>  wrote:

> Like C, Python seems to insist I declare functions before calling them
> - rather than, say, scanning to the end of the current script when it
> can't immediately find what function I'm referring to.

Python has no such restriction.

The only restriction is that the function be defined before it is
called.  Unlike C, function definitions in Python are executable
statements.

If your script looks like this:

    f( ) # call f

    def f( ) # define f
      print 'hello'

then it will fail because f has not yet been defined before it was
called.

> Does Python allow you to do something similar?

No.  Python has no such thing as a function declaration.

> If not how do you create functions with circular dependencies in
> Python - where function A could call function B; and function
> B could call function A - or is that not possible?

Perhaps if you can post a minimal example that shows us what you're
running into, someone here will know how to help.

HTH,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From greg at cosc.canterbury.ac.nz  Fri Apr  1 00:08:57 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 01 Apr 2005 17:08:57 +1200
Subject: itertools to iter transition (WAS: Pre-PEP: Dictionary
 accumulator methods)
In-Reply-To: <du73budhbff.fsf@lehtori.cc.tut.fi>
References: <_eednaLUwpA2o9XfRVn-vg@comcast.com> <OJ82e.30130$qN3.113@trndny01>
	<du78y46n659.fsf@lehtori.cc.tut.fi>
	<t8GdnWcs-9J6AdTfRVn-hw@comcast.com>
	<du73budhbff.fsf@lehtori.cc.tut.fi>
Message-ID: <3b43bjF6bcb60U2@individual.net>

Ville Vainio wrote:

> The issue that really bothers me here is bloating the builtin
> space. We already have an uncomfortable amount of builtin
> functions.

Maybe what we're really after here is the notion of a
builtin module that's pre-imported into the builtin
namespace.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From postmaster at castleamber.com  Sun Apr 24 19:27:17 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 23:27:17 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<du7zmvn24gi.fsf@mozart.cc.tut.fi>
Message-ID: <Xns9642BBB29D7FFcastleamber@130.133.1.4>

Ville Vainio wrote:

>>>>>> "John" == John Bokma <postmaster at castleamber.com> writes:
> 
>     >> Nah, they aren't slow. They just have to worry about more
>     >> things than the Python developers.
> 
>     John> Do you have references to this? I would love to see if
>     John> indeed 100 Python programmers do implement, say 5 CS tasks
>     John> faster compared to 100 Perl programmers, on average.
> 
> I am quite sure

I am sorry, "quite sure" doesn't count :-D

> no error handling needed (exceptions take care of it automatically).

Who told you Perl can't do exceptions?

> I would also venture to guess that random (adult) Python programmers
> would be of higher skill level as far as programming in general goes
> (know more languages, have a "good taste"...).

I already gave two very good reasons why this is the case.

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


From carlosea at gmail.com  Tue Apr 26 09:57:56 2005
From: carlosea at gmail.com (carlosea at gmail.com)
Date: 26 Apr 2005 06:57:56 -0700
Subject: Mailman attachments on archive
Message-ID: <1114523876.474377.41050@o13g2000cwo.googlegroups.com>

Hi.

   How can I keep the attachments on mailman archive with friendly
links, and without changing the file extension?
   Now messages look like this:

-------------------------------------------------
message blablabla...

-------------- next part --------------
A non-text attachment was scrubbed...
Name: Cronograma MPCM.mpp
Type: application/vnd.ms-project
Size: 262144 bytes
Desc: not available
Url :
/pipermail/group_domain/attachments/20050425/bb11911f/CronogramaMPCM-0001.bin
-------------------------------------------------

   There is no hyperlink to the URL and the path is invalid.

   Any suggestions that doesn't require rewriting the code (I'm using a
host service).

Thanks,

Carlos Eduardo



From expecthealth at yahoo.com  Tue Apr 19 12:19:48 2005
From: expecthealth at yahoo.com (bill norris)
Date: Tue, 19 Apr 2005 09:19:48 -0700 (PDT)
Subject: please unsubscibe
In-Reply-To: 6667
Message-ID: <20050419161948.15860.qmail@web80203.mail.yahoo.com>

Thank you,
 
 
Bill Norris

John Roth <newsgroups at jhrothjr.com> wrote:
I'm pleased to announce that PyFit 0.7a1
is now available in the file sections of
the Extreme Programming and FitNesse
Yahoo groups. This version implements
most of the Fit Library, and changes
needed to bring the package into 
conformance with the Fit 1.1 specification.
It also brings it to the level of FitNesse
20050405, plus additional features.

John Roth
April 18, 2005
-- 
http://mail.python.org/mailman/listinfo/python-announce-list

Support the Python Software Foundation:
http://www.python.org/psf/donations.html
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From tjreedy at udel.edu  Wed Apr 13 13:30:18 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 13 Apr 2005 13:30:18 -0400
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be><mailman.1751.1113310691.1799.python-list@python.org><slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be><mailman.1793.1113334936.1799.python-list@python.org><slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be><mailman.1818.1113375260.1799.python-list@python.org><slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be><mailman.1823.1113383437.1799.python-list@python.org>
	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3jkp7$8qs$1@sea.gmane.org>


"Antoon Pardon" <apardon at forel.vub.ac.be> wrote in message 
news:slrnd5pqfh.lf2.apardon at rcpc42.vub.ac.be...
> I see this as my contribution to the communities who has provided me
> with all kinds of things that are usefull to me. I'm willing to put
> time into this,

Great.  My human, non-lawyer advice, if I were to give it, would be to 
worry less and remember that PSF exists to promote Python, not to sue 
Python promoters.

>From what I understand from what you have written, you have written code 
for a tutorial based on one module of the library.  I personally would 
treat this minor extraction differently from a 'derived' work consisting of 
an alternate interpreter + library, such as from ActiveState, or Enthought, 
or Jython, or Iron-Python.  I think I would simply put lines in the header 
something like:
"Derived from module heapify in the library included with CPython 2.x, (C) 
<include PSA's copyright notice>, available from www.python.org/wherever.

Terry J. Reedy





From fredrik at pythonware.com  Sun Apr 24 07:19:49 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 13:19:49 +0200
Subject: Object oriented storage with validation (was: Re: Caching
	compiled regexps across sessions (was Re: Regular Expressions
	- Python vs Perl))
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com><d48ktk$4ov$1@news.vcd.hp.com>
	<RMmdnRLDlZu6fPrfRVn-rQ@telcove.net><mailman.2250.1114119969.1799.python-list@python.org><m3sm1jbfek.fsf@iny.iki.fi>
	<du7sm1j6uzc.fsf@mozart.cc.tut.fi><m3u0lzm5q1.fsf@iny.iki.fi><roy-F93E58.08375122042005@reader1.panix.com><m3oec6c056.fsf@iny.iki.fi><mailman.2289.1114190176.1799.python-list@python.org><m3k6muaxmi.fsf@iny.iki.fi>
	<du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi>
	<m3ekd0vd6i.fsf_-_@iny.iki.fi>
Message-ID: <d4fv2r$mu5$1@sea.gmane.org>

Ilpo Nyyss?nen wrote:

> What is the point in doing validation if it isn't done every time? Why
> wouldn't I do it every time? It isn't that slow thing to do.

DTD validation is useful in two cases: making sure that data from
a foreign source has the right structure, and making sure that data
you create has the right structure.  The former is relevant for de-
ployed code, but the latter really only makes sense during deve-
lopment, and can easily be solved by running an external validator
as part of your test suite.

> Pickle doesn't have validation. I am not comfortable for using it as
> storage format that should be reliable over years when the program
> evolves. It also doesn't tell me if my program has put something other
> to the data than I meant to.

But DTD validation doesn't tell you that either -- it's only concerned
with the structure, not the content. You can get a bit further with better
schema technologies, but if you want reliable storage, use checksums
or digests.  Validation is like the helmet used by skydivers; if you think
that's all you need, you sure is going to be surprised when you hit the
ground.

> I want to do the simplest thing, but I also want something that helps
> me keep the program usable also in the future. I prefer putting some
> resources to get some validation to it initially than use later more
> resouces to do something with undetermined lump of data.

If you want the simplest thing, get rid of the DTD, and make your
loader ignore things that it doesn't recognize, use default values for
fields that are not required (or weren't in the format from the start),
and give a nice readable error message if something required is
missing.  That'll give you a nice, portable, reliable, and extremely
future-proof design.

> > Check out (coincidentally) Fredrik's elementtree:
> >
> > http://effbot.org/zone/element-index.htm
>
> At least the interface looks quite simple and usable. With some
> validation wrapping over it, it might be ok...

I was going to point you to a validating parser for ET, but the "it might
be ok" statement is a bit too arrogant for my taste.

</F>





From bearophileHUGS at lycos.com  Sun Apr 10 13:41:13 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 10 Apr 2005 10:41:13 -0700
Subject: Smart help again
Message-ID: <1113154873.292836.251810@l41g2000cwc.googlegroups.com>

Hello, here I extend the idea of the smart help I've discussed
recently.
When I receive an error like:

TypeError: fun() takes exactly 2 arguments (1 given)

I'd also like to see that method/function parameters (or the first line
of its docstring).
>From a discussion with gentle programmers in another newsgroup, I've
see that this problem can probably be solved with something like:

. import sys, exceptions, difflib, inspect
.
. def excepthook(type, value, tb):
.   extra = ""
.   if sys.last_type == exceptions.TypeError:
.     # extra = string of function/method +
.     #  parameters inspect.getargspec(function or method)
.   import traceback
.   tblines = traceback.format_exception(type, value, tb)
.   tblines.append(extra)
.   print "".join( map(str, tblines) )
.   sys.exit(1)
.
. sys.excepthook = excepthook


inspect.getargspec is useful, but how can I find there the class+method
or (function name) of the raised error? I can find the function name
with something like this, but it doesn't look like a nice solution, and
it cannot be used to find the class of the method:

extra = str(sys.last_value)
extra = extra[:extra.find("()")]

Thank you,
Bearophile



From duncan.booth at invalid.invalid  Thu Apr 28 11:37:57 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 28 Apr 2005 15:37:57 GMT
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
	<1114696780.653849.220080@o13g2000cwo.googlegroups.com>
	<1114698836.708809.32780@o13g2000cwo.googlegroups.com>
Message-ID: <Xns9646A9319F208duncanbooth@127.0.0.1>

runes wrote:

> Hi Jay. It seems like my requirement is a light edition of your. I like
> having many console windows open, and to make it easier to switch
> between them, I like to name them.  Todays solution is rather tedious
> 
> - a batch file that calls a python script that isolates the directory
> name and stores it in temp file the batch file reads and use as
> argument in the title command.
> 
> It works fine, but I dislike the combination and the entire concept of
> having to create a temporary file for such a small task. The "batch
> language" is probably the most terrible scripting environment ever
> created ;-)

As I showed in my other post you can parse program output without using a 
temporary file.
 
If all you want to do is to run a script which sets the title when CMD.exe 
starts, that is actually quite easy:

---- c:\temp\startcmd.py ----
import os
print "Python startup"
os.execv('c:\\windows\\system32\\cmd.exe',
     ["/D", "/C", "title", "CMD - " + os.getcwd()]
-----------------------------

Then run regedit and find the key 
HKEY_CURRENT_USER\Software\Microsoft\Command Processor\AutoRun

edit it and insert the name of your script (in this example 
c:\temp\startcmd.py).

Now whenever you start a new command processor the script will set the 
title and CMD will NOT reset it. It seems that if you set the title from a 
subprocess when CMD is starting it will accept your change.

Warning: don't use os.system from the startcmd.py script as that would run 
CMD.exe without the /D flag which would run the script recursively as it 
starts.


From sizelji at insightbb.com  Tue Apr 12 11:00:15 2005
From: sizelji at insightbb.com (Jim Sizelove)
Date: Tue, 12 Apr 2005 15:00:15 GMT
Subject: Python / Win32 extensions compatibility with Windows XP
In-Reply-To: <1113315028.226858.245860@f14g2000cwb.googlegroups.com>
References: <1113315028.226858.245860@f14g2000cwb.googlegroups.com>
Message-ID: <3oR6e.7553$xL4.1607@attbi_s72>

Matthew wrote:
> Hi:
> 
> I recently installed Python 2.4 and the Win 32 extensions on
> Windows XP.  I had some problems with the COM makepy utility for the
> Excel COM libraries.  I reported this problem to the sourceforge bug
> tracker.
> 
> My question is , is python 2.3 and the win32 extensions more stable
> than Python 2.4?
> 
> Thank You
> 
> Matthew Harelick
> 

There were some memory issues that caused makepy on Python 2.4 to crash 
for some large type libraries (including Excel).  This problem has been 
fixed in build 204 of pywin32, released just today.

Regards,

Jim


From RonGrossi  Sun Apr 17 00:14:04 2005
From: RonGrossi (RonGrossi)
Date: 16 Apr 2005 23:14:04 -0500
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 141)
References: <1113707535.383715.327170@g14g2000cwa.googlegroups.com>
Message-ID: <vdo3619s4m9pkq6lm41ngosbqr5m6nngbk@4ax.com>

!!


From jstroud at mbi.ucla.edu  Fri Apr 15 22:32:02 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 15 Apr 2005 19:32:02 -0700
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <200504151932.02641.jstroud@mbi.ucla.edu>

I_vote_yes(James):
   I_understand_what_it_does = True
   Makes_code_formatting_way_more_managable_in_tough_cases = True
   Makes_code_way_more_readable = True
   To_cool = True

On Friday 15 April 2005 04:45 pm, Brian Sabbey wrote:
> Here is a pre-PEP for what I call "suite-based keyword arguments". The
> mechanism described here is intended to act as a complement to thunks.
> Please let me know what you think.
>
> Suite-Based Keyword Arguments
> -----------------------------
>
> Passing complicated arguments to functions is currently awkward in Python.
> For example, the typical way to define a class property winds up polluting
> the class's namespace with the property's get/set methods.  By allowing
> keyword arguments to be defined in a suite following a function call,
> complicated arguments can be passed in a cleaner, easier way.
>
> Examples
> ========
>
> Using suite-based keyword arguments, the code
>
> f(x = 1)
>
> is equivalent to
>
> f():
>     x = 1
>
> In general, a suite following a function call creates a new scope.  The
> bindings created in this scope get passed to the function as keyword
> arguments.
>
> Suite-based keyword arguments can be mixed with regular arguments:
>
> f(1, 2, y = 4):
>      x = 1
>
> Motivation
> ==========
>
> One motivation for suite-based keywords is to allow cleaner definitions of
> properties.  Currently, properties are typically define as in this
> example:
>
> class C(object):
>     def getx(self):
>        return self.__x
>     def setx(self, value):
>        self.__x = value
>     def delx(self):
>        del self.__x
>     x = property(getx, setx, delx, "I'm the 'x' property.")
>
> The 'getx', 'setx', and 'delx' methods get defined in the namespace of the
> class even though one wants only to pass them to 'property'.  Ideally, one
> would want these methods to be defined in their own namespace.  Also, it
> would be helpful when reading the code if the layout of the code gave
> visual indication that their only purpose is to be used in a property.
>
> Using suite-based keyword arguments, and without any changes to the
> 'property' type, this code can be written as:
>
> class C(object):
>     x = property():
>        doc = "I'm the 'x' property."
>        def fget(self):
>           return self.__x
>        def fset(self, value):
>           self.__x = value
>        def fdel(self):
>           del self.__x
>
> Here, 'fget', 'fset' and 'fdel' do not wind up as methods of the class,
> and it is visually clear that they are methods only for the 'x' property.
> Also, this code is less bug-prone since the name of each method need
> appear only once.
>
> Passing callbacks in other situations is made similarly easier and
> cleaner:
>
> setHandlers():
>      def success():
>          print 'success'
>      def failure():
>          print 'an error has occured'
>      def apocalypse():
>          print 'a serious error has occured'
>
> a = [1,3,2]
> a.sort():
>      def cmpfunc(x,y):
>          return cmp(x,y)
>
> Situations that do not require callbacks can also be better organized
> using suite-based keywords.  For example, here is code as it would
> currently be written in Python:
>
> if a:
>      x = 1
> else:
>      x = 2
> f(x=x)
>
> When reading this code, one reaches the 'if' statment without knowing what
> its purpose is-- layout of the code does not indicate that the 'if'
> statement is calculating an argument to 'f'.  Also, it requires a binding
> that serves no purpose other than to hold an argument to 'f', yet this
> binding persists for the rest of the surrounding function.
>
> Here is the same code using suite-based keyword arguments
>
> f():
>      if a:
>          x = 1
>      else:
>          x = 2
>
> When reading this code, it is easy to skip over everything that is
> involved in calling 'f', if one so desires.  Since the suite has its own
> namespace, one does not have to worry that the suite creates some bindings
> that will be important later in the function.

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

http://www.jamesstroud.com/


From mal at egenix.com  Fri Apr 15 17:26:47 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 15 Apr 2005 23:26:47 +0200
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <1113579774.353462.30960@l41g2000cwc.googlegroups.com>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>	<mailman.1957.1113568143.1799.python-list@python.org>
	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>
Message-ID: <42603197.9090002@egenix.com>

Peter Herndon wrote:
> Another option is adodbapi, which in my experience is much faster than
> mx.ODBC.  

Much faster ?

See http://www.microsoft.com/technet/prodtechnol/windows2000serv/technologies/iis/reskit/iischp7.mspx
and scroll down to Table 7.1:

      Table 7.1 TPS (transactions per second) Per Number of Threads by MDAC Technology
      Threads 	1 	2 	5 	10 	20 	50
      ODBC 	66.37 	146.28 	350.46 	626.76 	900.24 	859.91
      OLEDB 	67.30 	141.92 	326.19 	590.57 	794.91 	715.78
      OLEDB 2.0	61.73 	126.93 	297.29 	506.75 	575.35 	526.61
      ADO 2.0 	51.24 	108.12 	240.91 	377.30 	361.26 	310.34

> You can find it at http://adodbapi.sourceforge.net , and it
> is Windows-only.  There's also http://pymssql.sourceforge.net, which is
> cross-platform using FreeTDS and unixodbc on *nix.  I haven't any
> experience with it, though.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 15 2005)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From austin at maxtronic.com.tw  Tue Apr 12 03:46:22 2005
From: austin at maxtronic.com.tw (Austin)
Date: Tue, 12 Apr 2005 15:46:22 +0800
Subject: How to minimize the window
Message-ID: <d3fu6s$5ek$1@netnews.hinet.net>

I wrote a GUI program with wxPython.
In the window, there are 3 attributes on left top.
"_" could let the program to minimize to tool bar.
I want to let the program minimized to the system tray.
Is there any way to let the window have 4 attributes?
"."  "_"  "O " "x" 




From mahs at telcopartners.com  Thu Apr  7 23:59:13 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 07 Apr 2005 20:59:13 -0700
Subject: curious problem with large numbers
In-Reply-To: <d34euk$9um$1@sea.gmane.org>
References: <723eb693050407124816431b6a@mail.gmail.com>
	<d34euk$9um$1@sea.gmane.org>
Message-ID: <d34vdc$cfn$1@sea.gmane.org>

Terry Reedy wrote:
> "Chris Fonnesbeck" <fonnesbeck at gmail.com> wrote in message 
> news:723eb693050407124816431b6a at mail.gmail.com...
> 
>>However, on Windows (have tried on Mac, Linux) I get the following 
>>behaviour:
>>
>>
>>>>>inf = 1e10000
>>>>>inf
>>
>>1.0
>>
>>while I would have expected:
>>
>>1.#INF
> 
> 
> On my Windows machine with 2.2.1, I get exactly what you expected:
> 
>>>>1e10000
> 
> 1.#INF
> 
>>>>inf=1e10000
>>>>inf
> 
> 1.#INF
> 
> If you get wrong behavior on a later version, then a bug has been 
> introduced somewhere, even perhaps in VC 7, used for 2.4.
> 
> Terry J. Reedy
> 
> 
> 
On my Windows machine, both 2.3.3 and 2.4 give the same (expected) result:
  >>> 1e10000
  1.#INF

Michael



From wuwei23 at gmail.com  Fri Apr 15 23:06:09 2005
From: wuwei23 at gmail.com (alex23)
Date: 15 Apr 2005 20:06:09 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <Xns9639A1F15A98Bduncanrcpcouk@127.0.0.1>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
	<Xns963892E01D954duncanrcpcouk@127.0.0.1>
	<1113573592.248241.38550@z14g2000cwz.googlegroups.com>
	<Xns9639A1F15A98Bduncanrcpcouk@127.0.0.1>
Message-ID: <1113620769.916435.47130@o13g2000cwo.googlegroups.com>


Duncan Booth wrote:
> Hmm, I believe you are right. I can't see any straight-forward
tutorials
> which use Python. I found a tutorial at onlamp.com, but it doesn't
seem to
> me to explain TDD at all clearly.

Mark Pilgrim's 'Dive Into Python' (http://diveintopython.org/) has a
couple of  chapters on unit testing
(http://diveintopython.org/unit_testing/index.html) that I found
worthwhile.

-alex23



From tundra at tundraware.com  Wed Apr 13 04:37:33 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 13 Apr 2005 04:37:33 EDT
Subject: A command in a String ?
In-Reply-To: <pan.2005.04.13.08.25.53.59804@optushome.com.au>
References: <pan.2005.04.13.08.25.53.59804@optushome.com.au>
Message-ID: <qc2vi2-o031.ln1@eskimo.tundraware.com>

Peter Moscatt wrote:
> I have a rather odd question:
> 
> Is there a way Python can execute a command within a string ?
> 
> For example if I had something like:
> _str = "fm=OptionMenu(root,xx,'string1','string2','string3')"
> 
> And the execute _str.
> 
> The reason why I am trying to do this that as I am aware the OptionMenu
> hasn't the ability insert options therefore the options would be inserted
> by manipulating strings.
> 
> Pete
> 

Look into the "eval" operation ...

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From radam2 at tampabay.rr.com  Thu Apr  7 18:38:25 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Thu, 07 Apr 2005 22:38:25 GMT
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu><mailman.1222.1112417820.1799.python-list@python.org><d2vhi8$k29$1@panix1.panix.com><mailman.1429.1112794393.1799.python-list@python.org><d33ij3$9jj$1@panix2.panix.com>
	<idna51pof93qshrpr3lq3flm8cdpapkdld@4ax.com>
	<mailman.1510.1112910847.1799.python-list@python.org>
Message-ID: <dlcb51d85olmli7uta714libti41eje44h@4ax.com>

On Thu, 7 Apr 2005 17:49:39 -0400, "Terry Reedy" <tjreedy at udel.edu>
wrote:

>"Ron_Adam" <radam2 at tampabay.rr.com> wrote in message 
>news:idna51pof93qshrpr3lq3flm8cdpapkdld at 4ax.com...
>> Python has one obvious best way to do things.
>
>
>More exactly, 'should preferably have' rather than 'has'.
>
>> Meaning that the most obvious and clearest way, the way that comes to
>> mind first, will in most cases, also be the best way.
>>
>> I seem to remember reading it put in that way some place at some time.
>
>>>> import this # The Zen of Python
>
>tjr

  ;-)

Ron



From nospam at nospam.com  Mon Apr  4 17:23:53 2005
From: nospam at nospam.com (3c273)
Date: Mon, 4 Apr 2005 14:23:53 -0700
Subject: Insert database rows from CSV file
Message-ID: <d2sb9901nlr@enews3.newsguy.com>

Hello,
I have a really simple Access database table with a format similar to this:
CustomerName - ProductOrdered - QtyOrdered

I have a CSV file with the appropriate values as follows:
Customer1, Widget1, 1000
Customer2, Widget2, 3000
etc

I have figured out how to insert the data manually from the interactive
prompt:
cursor.execute(""" INSERT INTO "Table1" Values ('Customer1', "Widget1',
'1000') """)

What I would like to do is iterate over the CSV file like this:
for lines in file:
    cursor.execute(""" INSERT INTO "Table1" lines """)

I have googled and found some examples that use string formatting, but
without documentation I can't seem to find the right formula. I don't have
any problem with the iteration part, I just can't seem to figure out how to
use a variable to insert an entire row with the INSERT statement. Can anyone
get me going in the right direction? I'm using odbc from win32all,
Python2.3, and Access2000 if it matters. Thanks.
Louis




From mirnazim at gmail.com  Thu Apr 28 00:42:16 2005
From: mirnazim at gmail.com (Mir Nazim)
Date: 27 Apr 2005 21:42:16 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1114587846.011299.125420@g14g2000cwa.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<1114503432.227799.52670@o13g2000cwo.googlegroups.com>
	<1114587592.260950.181990@l41g2000cwc.googlegroups.com>
	<1114587846.011299.125420@g14g2000cwa.googlegroups.com>
Message-ID: <1114663336.926935.97910@f14g2000cwb.googlegroups.com>

Can you please brief me a bit about your decision to CherryPy



From steven.bethard at gmail.com  Sun Apr 10 16:31:04 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 10 Apr 2005 14:31:04 -0600
Subject: numarray.array can be VERY slow
In-Reply-To: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
References: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
Message-ID: <pYWdncAGZPWUEMTfRVn-uQ@comcast.com>

Edward C. Jones wrote:
> Steven Bethard wrote:
> 
>  > As mentioned, this has nothing to do with numarray, and everything to
>  > do with your inexplicable use of lists.  Why don't you just write this
>  > as:
>  >
>  > arr = numarray.ones((8, 8, 256, 256), Float64)
> 
> The code I posted was simplified from a larger program which I have now 
> revised. But I still ask: why did it take 4.3 seconds to run?

And I repeat, because you were using lists, not numarray. ;)  If you 
want a numarray array, create it directly, don't create it from lists.

What's your real code look like?  Are you sure you need two nested 
loops?  If you're sure, can you do something like
     import numarray as na
     arr = na.zeros((8, 8, 256, 256))
     for i in xrange(8):
         for j in xrange(8):
             arr[i,j] = na.ones((256, 256))
where you allocate the array first and then fill it?

STeVe


From steven.bethard at gmail.com  Thu Apr 21 17:37:03 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 21 Apr 2005 15:37:03 -0600
Subject: grouping subsequences with BIO tags
Message-ID: <wPidnSMBAONhgfXfRVn-sw@comcast.com>

I have a list of strings that looks something like:
     ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
I need to group the strings into runs (lists) using the following rules 
based on the string prefix:
     'O' is discarded
     'B_...' starts a new run
     'I_...' continues a run started by a 'B_...'
So, the example above should look like:
     [['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]

At the same time that I'm extracting the runs, it's important that I 
check for errors as well.  'I_...' must always follow 'B_...', so errors 
look like:
     ['O', 'I_...']
     ['B_xxx', 'I_yyy']
where 'I_...' either follows an 'O' or a 'B_...' where the suffix of the 
'B_...' is different from the suffix of the 'I_...'.

This is the best I've come up with so far:

py> class K(object):
...     def __init__(self):
...         self.last_result = False
...         self.last_label = 'O'
...     def __call__(self, label):
...         if label[:2] in ('O', 'B_'):
...             self.last_result = not self.last_result
...         elif self.last_label[2:] != label[2:]:
...             raise ValueError('%s followed by %s' %
...                              (self.last_label, label))
...         self.last_label = label
...         return self.last_result
...
py> def get_runs(lst):
...     for _, item in itertools.groupby(lst, K()):
...         result = list(item)
...         if result != ['O']:
...             yield result
...
py> list(get_runs(['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']))
[['B_X'], ['B_Y', 'I_Y'], ['B_X', 'I_X'], ['B_X']]
py> list(get_runs(['O', 'I_Y']))
Traceback (most recent call last):
   ...
ValueError: O followed by I_Y
py> list(get_runs(['B_X', 'I_Y']))
Traceback (most recent call last):
   ...
ValueError: B_X followed by I_Y

Can anyone see another way to do this?

STeVe


From claudio.grondi at freenet.de  Fri Apr  8 19:59:20 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 8 Apr 2005 23:59:20 -0000
Subject: ANN: Python script (for Windows) accessing motherboard sensory data
References: <3bilaqF6in0icU1@individual.net> <hdijzrny.fsf@python.net>
	<3birmbF6bhm54U1@individual.net> <y8bvy7vd.fsf@python.net>
	<3bj44iF6gj7t9U1@individual.net> <3bn4m3F6l2o3qU1@individual.net>
Message-ID: <3bodc2F6ilthcU1@individual.net>

Supervising motherboard sensory data  as
fan speeds or CPU and board temperatures
in Python can be done with help of the MBM 5
utility available at http://mbm.livewiredev.com/.

This utility exposes data got from the hardware
sensors in a shared memory area for querying
by another applications.

The pyMBM.py script provided below prints
excerpts of the content of the by MBM 5
in shared memory area provided data
and can be used as a starting point
for writing own scripts which need to
query motherboard sensory data or
as inspiration for creating an
appropriate pyMBM Python module.

Claudio Grondi

print
print '          pyMBM.py   ver. 0.10   2005-04-08             '
print '*** ************************************************ ***'
print '*** THIS code accesses shared memory area exposed by ***'
print '***            MBM 5 (MotherBoard Monitor)           ***'
print '***  install and run MBM 5 before using this script  ***'
print '***      MBM 5 home:  http://mbm.livewiredev.com     ***'
print '*** Port of the MBM API to Python by Claudio Grondi  ***'
print '***     http://www.python.org/moin/ClaudioGrondi     ***'
print '*** ************************************************ ***'

# centralized settings for portability and upgradability
SENSOR_INDEX_LENGTH     =  10
SENSOR_INFO_LENGTH      = 100

SENSOR_NAME_LEN         =  12
TIME_STRING_LENGTH      =  41
MBM_PATHNAME_LENGTH     = 256

SMBUSNAME_STRING_LENGTH =  41

PADDING1_SIZE_BYTES     =   3
PADDING2_SIZE_BYTES     =   4
PADDING3_SIZE_BYTES     =   8

#define BT_ISA         "type_isa"
#define BT_SMBUS       "type_smbus"
#define BT_VIA686ABUS  "type_via686abus"
#define BT_DIRECTIO    "type_directio"
#define BT_UNKNOWN     "type_unknown"
# typedef enum { btISA = 0, btSMBus, btVIA686ABus, btDirectIO } bus_t;
bus_t = [
   "ISA       "  # 0
  ,"SMBus     "  # 1
  ,"Via686aBus"  # 2
  ,"DirectIO  "  # 3
]

#define SMBT_INTEL   "type_intel"
#define SMBT_AMD     "type_amd"
#define SMBT_ALI     "type_ali"
#define SMBT_NFORCE  "type_nforce"
#define SMBT_SIS     "type_sis"
#define SMBT_UNK     BT_UNKNOWN
# typedef enum { smtSMBIntel = 0, smtSMBAMD, smtSMBALi, smtSMBNForce,
smtSMBSIS } smb_t;
smb_t = [
   "Intel "      # 0
  ,"AMD   "      # 1
  ,"Ali   "      # 2
  ,"nForce"      # 3
  ,"sis   "      # 4
]

#define ST_UNKNOWN      BT_UNKNOWN
#define ST_TEMPERATURE  "type_temperature"
#define ST_VOLTAGE      "type_voltage"
#define ST_FAN          "type_fan"
#define ST_MHZ          "type_mhz"
#define ST_PERCENTAGE   "type_percentage"
# typedef enum { stUnknown = 0, stTemperature, stVoltage, stFan, stMhz,
stPercentage } sensor_t;
sensor_t = [
   "unknown    "  # 0
  ,"temperature"  # 1
  ,"voltage    "  # 2
  ,"fan        "  # 3
  ,"mhz        "  # 4
  ,"percentage "  # 5
]

from ctypes import *

class index(Structure):
  _fields_ = [
     ("_type"    , c_int  ) # type of sensor
    ,("_count"   , c_int  ) # number of sensor for that type
  ]
class sensor(Structure):
  _fields_ = [
     ("_type"    , c_ubyte        ) # type of sensor
    ,("_name"    , c_ubyte * SENSOR_NAME_LEN     ) # name of sensor
    ,("_padding1", c_ubyte * PADDING1_SIZE_BYTES ) # padding of 3 byte
    ,("_current" , c_double       ) # current value
    ,("_low"     , c_double       ) # lowest readout
    ,("_high"    , c_double       ) # highest readout
    ,("_readout" , c_long         ) # total number of readout
    ,("_padding2", c_ubyte * PADDING2_SIZE_BYTES ) # padding of 4 byte
    ,("_total"   , c_double       ) # actual a long double - total amout of
all readouts
    ,("_padding3", c_ubyte * PADDING3_SIZE_BYTES ) # padding of 6 byte
    ,("_alarm1"  , c_double       ) # temp & fan: low alarm; voltage: % off;
    ,("_alarm2"  , c_double       ) # temp: high alarm
  ]
class info(Structure):
  _fields_ = [
     ("_smbBase"       , c_short ) # SMBus base address
    ,("_smbType"       , c_ubyte ) # bus_t variant of SMBus/Isa bus used to
access chip
                                   # typedef enum
{btISA=0,btSMBus,btVIA686ABus,btDirectIO} bus_t;
    ,("_smbCode"       , c_ubyte ) # smb_t variant of SMBus sub type, Intel,
AMD or ALi
                                   # typedef enum
{smtSMBIntel=0,smtSMBAMD,smtSMBALi,smtSMBNForce,smtSMBSIS} smb_t;
    ,("_smbAddr"       , c_ubyte ) # Address of sensor chip on SMBus
    ,("_smbName"       , c_ubyte * SMBUSNAME_STRING_LENGTH ) # Nice name for
SMBus
    ,("_isaBase"       , c_short ) # ISA base address of sensor chip on ISA
    ,("_chipType"      , c_int   ) # Chip nr, connects with Chipinfo.ini
    ,("_voltageSubType", c_ubyte ) # Subvoltage option selected
  ]
class data_t(Structure):
  _fields_ = [
     ("_version", c_double                      ) # version number (example:
51090)
    ,("_index"  , index   * SENSOR_INDEX_LENGTH ) # Sensor index
    ,("_sensor" , sensor  * SENSOR_INFO_LENGTH  ) # sensor info
    ,("_info"   , info                          ) # misc. info
    ,("_start"  , c_ubyte * TIME_STRING_LENGTH  ) # start time,
TIME_STRING_LENGTH = 41
    ,("_current", c_ubyte * TIME_STRING_LENGTH  ) # current time
    ,("_path"   , c_ubyte * MBM_PATHNAME_LENGTH ) # MBM path
  ]

FILE_MAP_READ = 2
strNameOfSharedMemoryAreaToAccess = "$M$B$M$5$S$D$"

handle = windll.kernel32.OpenFileMappingA(FILE_MAP_READ, 0,
strNameOfSharedMemoryAreaToAccess)
if not handle:
  raise WinError()
addr = windll.kernel32.MapViewOfFile(
   handle
  ,FILE_MAP_READ
  ,0
  ,0
  ,0
)
if not addr:
  raise WinError()
obj_data_t = data_t.from_address(addr)

# obj_data_t holds the entire shared memory area content which can be
accessed
# now from within Python code like it is done below:

if(__name__ == '__main__'):
  print
  print '_version ', obj_data_t._version
  print

  # print '_index   ', obj_data_t._index
  itemCounter = 0
  for item in obj_data_t._index:
    itemCounter += 1
    print '_index[%2i]._type ='%itemCounter, sensor_t[item._type],
'_index._count =',repr(item._count)
  print

  # print '_sensor  ', obj_data_t._sensor
  itemCounter = 0
  for item in obj_data_t._sensor:
    itemCounter += 1
    print '_sensor[%3i]._type ='%itemCounter, sensor_t[item._type],
    strSensorName = ''
    for subitem in item._name:
      strSensorName += chr(subitem)
    print '  ._name =', strSensorName,
    print '  ._current = %7.2f'%item._current, '  ._low = %7.2f'%item._low,
'  ._high = %7.2f'%item._high
  print
  # print '_info    ', obj_data_t._info
  print '_info._smbType =', bus_t[obj_data_t._info._smbType]
  print '_info._smbCode =', smb_t[obj_data_t._info._smbCode]

  print
  print '_start   ',
  strStart = ''
  for char in obj_data_t._start:
    strStart += chr(char)
  print strStart
  print '_current ',
  strCurrent = ''
  for char in obj_data_t._current:
    strCurrent += chr(char)
  print strCurrent,
  print
  print '_path    ',
  strPath = ''
  for char in obj_data_t._path:
    strPath += chr(char)
  print strPath,

  windll.kernel32.UnmapViewOfFile(addr)
  windll.kernel32.CloseHandle(handle)

  print
  raw_input('                              (exit with ENTER) #> OK? ')
#:if




From mahs at telcopartners.com  Fri Apr 29 21:50:18 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 29 Apr 2005 18:50:18 -0700
Subject: Micro-PEP: str.translate(None) to mean identity translation
In-Reply-To: <4272e00c.260731842@news.oz.net>
References: <4272e00c.260731842@news.oz.net>
Message-ID: <d4untj$qvr$2@sea.gmane.org>

Bengt Richter wrote:
> Just thought None as the first argument would be both handy and mnemonic,
> signifying no translation, but allowing easy expression of deleting characters,
> e.g.,
> 
>    s = s.translate(None, 'badcharshere')
> 
> Regards,
> Bengt Richter

+1

Michael



From vegeta.z at gmail.com  Tue Apr  5 06:55:47 2005
From: vegeta.z at gmail.com (vegetax)
Date: Tue, 05 Apr 2005 06:55:47 -0400
Subject: Python Google Server
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
Message-ID: <d2tqnq$4k3$1@sea.gmane.org>

fuzzyman at gmail.com wrote:

lol ,cool hack!! make a slashdot article about it!!

> I've hacked together a 'GoogleCacheServer'. It is based on
> SimpleHTTPServer. Run the following script (hopefully google groups
> won't mangle the indentation) and set your browser proxy settings to
> 'localhost:8000'. It will let you browse the internet using google's
> cache. Obviously you'll miss images, javascript, css files, etc.
> 
> See the world as google sees it !
> 
> (This is actually an 'inventive' short term measure to get round a
> restrictive internet policy at work :-) I'll probably put it in the
> Python Cookbook as it's quite fun (so if line lengths or indentation is
> mangled here, try there). Tested on Windows XP, with Python 2.3 and IE.
> 
> 
> 
> # Copyright Michael Foord, 2004 & 2005.
> # Released subject to the BSD License
> # Please see http://www.voidspace.org.uk/documents/BSD-LICENSE.txt
> 
> # For information about bugfixes, updates and support, please join the
> Pythonutils mailing list.
> # http://voidspace.org.uk/mailman/listinfo/pythonutils_voidspace.org.uk
> # Comments, suggestions and bug reports welcome.
> # Scripts maintained at http://www.voidspace.org.uk/python/index.shtml
> # E-mail fuzzyman at voidspace.org.uk
> 
> import google
> import BaseHTTPServer
> import shutil
> from StringIO import StringIO
> import urlparse
> 
> __version__ = '0.1.0'
> 
> 
> """
> This is a simple implementation of a server that fetches web pages
> from the google cache.
> 
> It lets you explore the internet from your browser, using the google
> cache.
> 
> Run this script and then set your browser proxy settings to
> localhost:8000
> 
> Needs google.py (and a google license key).
> See http://pygoogle.sourceforge.net/
> and http://www.google.com/apis/
> """
> 
> cached_types = ['txt', 'html', 'htm', 'shtml', 'shtm', 'cgi', 'pl',
> 'py']
> google.setLicense(google.getLicense())
> googlemarker = '''<i>Google is not affiliated with the authors of this
> page nor responsible for its
>
content.</i></font></center></td></tr></table></td></tr></table>\n<hr>\n'''
> markerlen = len(googlemarker)
> 
> class googleCacheHandler(BaseHTTPServer.BaseHTTPRequestHandler):
>     server_version = "googleCache/" + __version__
>     cached_types = cached_types
>     googlemarker = googlemarker
>     markerlen = markerlen
> 
>     def do_GET(self):
>         f = self.send_head()
>         if f:
>             self.copyfile(f, self.wfile)
>             f.close()
> 
>     def send_head(self):
>         """Common code for GET and HEAD commands.
> 
>         This sends the response code and MIME headers.
> 
>         Return value is either a file object (which has to be copied
>         to the outputfile by the caller unless the command was HEAD,
>         and must be closed by the caller under all circumstances), or
>         None, in which case the caller has nothing further to do.
> 
>         """
>         print self.path
>         url = urlparse.urlparse(self.path)[2]
>         dotloc = url.find('.') + 1
>         if dotloc and url[dotloc:] not in self.cached_types:
>             return None     # not a cached type - don't even try
> 
>         thepage = google.doGetCachedPage(self.path)
>         headerpos = thepage.find(self.googlemarker)
>         if headerpos != -1: # remove the google header
>             pos = self.markerlen + headerpos
>             thepage = thepage[pos:]
> 
>         f = StringIO(thepage)
> 
>         self.send_response(200)
>         self.send_header("Content-type", 'text/html')
>         self.send_header("Content-Length", str(len(thepage)))
>         self.end_headers()
>         return f
> 
>     def copyfile(self, source, outputfile):
>         shutil.copyfileobj(source, outputfile)
> 
> 
> def test(HandlerClass = googleCacheHandler,
>          ServerClass = BaseHTTPServer.HTTPServer):
>     BaseHTTPServer.test(HandlerClass, ServerClass)
> 
> 
> if __name__ == '__main__':
>     test()
> 




From __peter__ at web.de  Fri Apr 15 01:48:43 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 15 Apr 2005 07:48:43 +0200
Subject: Formated String in optparse
References: <3569dc63.0503302359.d7e163a@posting.google.com>
	<d2gflu$c1q$04$1@news.t-online.com>
	<1112264573.694445.31520@z14g2000cwz.googlegroups.com>
	<d2gkf2$ej9$02$1@news.t-online.com>
	<3569dc63.0504140104.1c32d0e3@posting.google.com>
Message-ID: <d3nkji$hth$04$1@news.t-online.com>

Norbert Thek wrote:

> Thank You for your help, its working!
> 
> Now I have an additional question.

...which would warrant a separate thread...

> The problem is the encoding of the Text
> I'm using German, Can you tell me how to encode
> the textstring that the Windows commandline shows the special letters
> right?
> For exampel i get 'f?r' but i want 'f?r'  (maybe reader with only an
> english enabled browser wouldn't see a difference..)
> 
> I tried to work with the encode method of string but It didn't work for me
> some hint what to do?

>>> u"f?r" # what you have (minus unicode)
u'f\xb3r'

>>> u"f?r" 
u'f\xfcr' # what you need

One way to get that (wrong) representation: 

>>> u"f?r".encode("cp1252").decode("cp850")
u'f\xb3r'

So it could be that you are interpreting cp1252 ("German" windows) as cp850
("German" DOS).

Try the following script:

# -*- coding: cp1252 -*-
text = u"text with umlauts ??? ??? ?".encode("cp850")
print text


If that works correctly, you can prepare every string literal in your
program in the same way. Or redirect sys.stdout

sys.stdout = codecs.getwriter("cp850")(sys.stdout)

as posted by Martin von L?wis on de.comp.lang.python only two days ago.

Peter








From james at wrong.nu  Fri Apr 29 17:26:41 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Fri, 29 Apr 2005 22:26:41 +0100
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <du7hdhpc0rs.fsf@amadeus.cc.tut.fi>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
	<du7hdhpc0rs.fsf@amadeus.cc.tut.fi>
Message-ID: <200504292226.46478.james@wrong.nu>

On Friday 29 April 2005 11:53, Ville Vainio wrote:
> >>>>> "Kent" == Kent Johnson <kent37 at tds.net> writes:
>
>     Kent> if frequency.has_key(word):
>     Kent> frequency[word] += 1
>     Kent> else:
>     Kent> frequency[word] = 1
>
> This is a good place to use 'get' method of dict:
>
> frequency[word] = frequency.get(word,0) + 1

try/except might be fastest of all:

http://gumuz.looze.net/wordpress/index.php/archives/2005/04/28/python-dictionary-speed-optimisation/
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From rpmuller at gmail.com  Wed Apr  6 22:46:37 2005
From: rpmuller at gmail.com (RickMuller)
Date: 6 Apr 2005 19:46:37 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <mf%4e.318$Xm3.61@trndny01>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
Message-ID: <1112841997.875293.178970@z14g2000cwz.googlegroups.com>

Well, it's a homework problem in the sense that I happen to be working
on it at my home, but, no, I'm not in school anymore. In Quantum
Mechanics we use determinants to enforce the Pauli principle, which
says that anytime two electrons are exchanged the wave function has to
change sign. In most Quantum Mechanical packages (for example,
PyQuante, http://pyquante.sf.net, which I wrote some years ago, is a
Python based quantum chemistry package) we don't actually have to
evaluate a determinant, we just evaluate the effect of the two-electron
operators on the permuted wave function. However, I'm working on some
quantum monte carlo codes where I'm trying to keep track of
configuration spin functions, which requires me to count every time I
flip orbitals.



From daniel.dittmar at sap.corp  Fri Apr  1 06:01:11 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Fri, 01 Apr 2005 13:01:11 +0200
Subject: Case-insensitive dict, non-destructive, fast, anyone?
In-Reply-To: <du7psxen5nv.fsf@lehtori.cc.tut.fi>
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi>
Message-ID: <d2j9nf$h0g$1@news.sap-ag.de>

Ville Vainio wrote:
> I need a dict (well, it would be optimal anyway) class that stores the
> keys as strings without coercing the case to upper or lower, but still
> provides fast lookup (i.e. uses hash table).

Store the original key together with the value and use a lowercase key 
for lookup.

only a sketch:

class MyDict:
     def __init__ (self):
         self.inner = {}

     def __setitem__ (self, key, value):
         self.inner [key.lower ()] = (key, value]

     def __getitem__ (self, key):
         realkey, realvalue = self.inner [self]
         return realvalue

     def get (self, key, default = None):
         try:
             return self [key]
         except KeyError:
             return default
         # or: return self.inner.get (key.lower (), (None, default)) [1]

     def keys (self):
         return [realkey for realkey, realval in self.inner.values ()]

     def values (self):
         return [realval for realkey, realval in self.inner.values  )]

    def items ():
         return self.inner.values ()

     # iterators are left as an exercise


From steven.bethard at gmail.com  Wed Apr 20 01:38:02 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 19 Apr 2005 23:38:02 -0600
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
In-Reply-To: <WNf9e.8539$_t3.4915@tornado.tampabay.rr.com>
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<CoOdnZbRee_Mg_7fRVn-rQ@comcast.com>
	<1113800859.317109.27720@f14g2000cwb.googlegroups.com>
	<WNf9e.8539$_t3.4915@tornado.tampabay.rr.com>
Message-ID: <bJCdnexxUpYnd_jfRVn-pw@comcast.com>

Ron wrote:
> How about using ***name in the same way as *name, and **name are used? 
> It extends the current argument options in a consistent manner and 'I 
> believe' is easy to explain and visually says something different is 
> happening here.
> 
> This builds on the already present arg, *arg, **arg,  and so why not a 
> ***arg to represent the 4th alternative, a suite?

I dont' see how this is consistent.  *arg and **arg correspond to the 
two different container protocols: sequence/iterable and mapping.  Which 
container protocol do you se ***arg as corresponding to?  Note that 
namespaces are just mappings, so if you want to treat a block like a 
namespace, **arg makes more sense...

STeVe


From mauriceling at acm.org  Wed Apr 27 18:42:55 2005
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 28 Apr 2005 08:42:55 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org> <426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
	<426fdea1$0$31536$9b622d9e@news.freenet.de>
Message-ID: <d4p4hn$rea$1@domitilla.aioe.org>

Martin v. L?wis wrote:

> [automatically install a set of packages]
> 
>>What do you think?
> 
> 
> That would certainly be possible. Contributions are welcome.
> 
> Regards,
> Martin

I've emailed to catelog-sig mailing list and is still waiting to hear 
something. Currently, I have no idea of the structure of PyPI. I hope I 
can hear from them soon and generate some starting points...

Maurice


From samantha7395 at hotmail.com  Sun Apr 10 00:36:41 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Sat, 9 Apr 2005 21:36:41 -0700
Subject: very simple tkinter demo program
References: <aQX5e.1205416$35.44366592@news4.tin.it>
Message-ID: <9NidnQVTQ9LKMMXfRVn-tQ@adelphia.com>

I can not get it to run.
S
"max(01)*" <max2 at fisso.casa> wrote in message 
news:aQX5e.1205416$35.44366592 at news4.tin.it...
> hello.
>
> i wrote a very simple tkinter demo program that uses menus, buttons, 
> labels, entries, frames and secondary toplevels.
>
> it is a python version of a java program made by a colleague.
>
> the user can create ("Scrivi") a record with his second name, first name 
> and date of birth, save ("Salva") the record to a file or read in 
> ("Leggi") a previously created file. "Annulla" is to cancel. "Chiudi" is 
> to close.
>
> i also used try-except for checking for invalid files.
>
> only one menu is real ("File"), the others are for future use.
>
> i'd like to hear your suggestions and comments for improving it.
>
> i recently learned tkiner from stephen ferg's website and reading the 
> tk8.4 widget demo programs.
>
> one thing i still cannot do is to make the primary window and the 
> secondary aware of each other (so avoid that a second instance of a 
> secondary window can be generated if an instance still exists, for 
> example).
>
> so, here it is folks:
>
> ---cut here---
>
> from Tkinter import *
>
> class MiaApp:
>   def __init__(self, genitore):
>
>     self.MioGenitore = genitore
>
>     fonte = ("Helvetica", "12")
>
>     self.campi = ["Cognome", "Nome" , "Data di nascita"]
>
>     quadro_grande = Frame(genitore)
>     quadro_grande.pack(expand = YES, fill = BOTH)
>
>     quadro_menu = Frame(quadro_grande)
>     quadro_menu.configure(
>       bd = 1,
>       relief = RAISED
>       )
>     quadro_menu.pack(side = TOP, fill = X)
>
>     pm_file = Menubutton(quadro_menu)
>     pm_file.configure(text = "File")
>     pm_file.pack(side = LEFT)
>
>     m_file = Menu(pm_file)
>     pm_file.configure(menu = m_file)
>     m_file.configure(tearoff = NO)
>     m_file.add_command(
>       label = "Scrivi",
>       command = self.premuto_scrivi
>       )
>     m_file.add_command(
>       label = "Leggi",
>       command = self.premuto_leggi
>       )
>     m_file.add_separator()
>     m_file.add_command(
>       label = "Chiudi",
>       command = genitore.destroy
>       )
>
>     pm_mod = Menubutton(quadro_menu)
>     pm_mod.configure(text = "Modifica")
>     pm_mod.pack(side = LEFT)
>
>     pm_aiuto = Menubutton(quadro_menu)
>     pm_aiuto.configure(text = "?")
>     pm_aiuto.pack(side = RIGHT)
>
>     msg = Label(quadro_grande)
>     msg.configure(
>       font = fonte,
>       relief = RIDGE,
>       wraplength = "10c",
>       justify = LEFT,
>       text = u"Questo \u00E8 un programma in Python \
> che trae ispirazione da un analogo lavoro del collega \
> G. Renda. Il programma originale era scritto \
> in linguaggio Java, e sfruttava le librerie JFC \
> (\u00ABJava Foundation Class\u00BB, dette anche \
> \u00ABSwing\u00BB); questo invece usa le librerie Tk, \
> mediante il modulo Tkinter."
>       )
>     msg.pack(
>       side = TOP,
>       padx = "2m",
>       pady = "2m"
>       )
>
>     quadro_pulsanti = Frame(quadro_grande)
>     quadro_pulsanti.pack(
>       side = BOTTOM,
>       fill = X,
>       padx = "2m",
>       pady = "2m"
>       )
>
>     scrivi = Button(quadro_pulsanti)
>     scrivi.configure(
>       text = "Scrivi",
>       command = self.premuto_scrivi
>       )
>     scrivi.pack(side = LEFT, expand = YES)
>
>     leggi = Button(quadro_pulsanti)
>     leggi.configure(text = "Leggi", command = self.premuto_leggi)
>     leggi.pack(side = LEFT, expand = YES)
>
>     chiudi = Button(quadro_pulsanti)
>     chiudi.configure(text = "Chiudi", command = genitore.destroy)
>     chiudi.pack(side = LEFT, expand = YES)
>
>   def premuto_scrivi(self):
>     InserimentoRecord()
>
>   def premuto_leggi(self):
>     ConsultazioneRecord()
>
> class InserimentoRecord(Toplevel):
>   def __init__(self):
>
>     Toplevel.__init__(self)
>
>     self.titolo = "Inserimento"
>     self.wm_title(self.titolo)
>
>     quadro_grande = Frame(self)
>     quadro_grande.pack(expand = YES, fill = BOTH)
>
>     self.quadro_pulsanti = Frame(quadro_grande)
>     self.quadro_pulsanti.pack(
>       side = BOTTOM,
>       fill = X,
>       padx = "2m",
>       pady = "2m"
>       )
>
>     quadri_ing = []
>     self.n = len(miaApp.campi)
>     self.var = []
>     eti = []
>     larg_eti = max(map(len, miaApp.campi))
>     ing = []
>     for i in range(self.n):
>       quadri_ing.append(None)
>       self.var.append(None)
>       ing.append(None)
>       eti.append(None)
>       quadri_ing[i] = Frame(quadro_grande)
>       quadri_ing[i].pack(side = TOP, expand = YES, fill = BOTH)
>       self.var[i] = StringVar()
>       eti[i] = Label(quadri_ing[i])
>       eti[i].configure(
> text = miaApp.campi[i] + ": ",
> width = larg_eti,
> anchor = E
> )
>       eti[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>       ing[i] = Entry(quadri_ing[i], textvariable = self.var[i])
>       ing[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>
>     self.salva = Button(self.quadro_pulsanti)
>     self.salva.configure(
>       text = "Salva",
>       command = self.premuto_salva
>       )
>     self.salva.pack(side = LEFT, expand = YES)
>
>     self.annulla = Button(self.quadro_pulsanti)
>     self.annulla.configure(
>       text = "Annulla",
>       command = self.premuto_annulla
>       )
>     self.annulla.pack(side = LEFT, expand = YES)
>
>   def premuto_salva(self):
>     import tkFileDialog
>     import pickle
>
>     dati = []
>     for i in range(self.n):
>       dati.append(None)
>       dati[i] = self.var[i].get()
>
>     nomefile = tkFileDialog.asksaveasfilename(
>       defaultextension = ".ana",
>       filetypes = [
> ("Record anagrafici", "*.ana"),
> ("Tutti i file", "*")
> ]
>       )
>
>     if nomefile:
>       f = open(nomefile, "w")
>       pickle.dump(dati, f)
>       f.close()
>
>     self.destroy()
>
>   def premuto_annulla(self):
>     self.destroy()
>
> class ConsultazioneRecord(Toplevel):
>   def __init__(self):
>
>     import tkFileDialog
>
>     nomefile = tkFileDialog.askopenfilename(
>       defaultextension = ".ana",
>       filetypes = [
> ("Record anagrafici", "*.ana"),
> ("Tutti i file", "*")
> ]
>       )
>
>     if nomefile:
>
>       try:  ### Il metodo 'pickle.load' potrebbe generare una
>     ### eccezione se l'utente cerca di aprire un file
>     ### non del formato giusto
>
> Toplevel.__init__(self)
>
> self.titolo = "Consultazione"
> self.wm_title(self.titolo)
>
> quadro_grande = Frame(self)
> quadro_grande.pack(expand = YES, fill = BOTH)
>
> eti_rec = Label(quadro_grande)
> eti_rec.configure(
>   text = "Record: " + nomefile,
>   relief = RIDGE
>   )
> eti_rec.pack(
>   side = TOP,
>   fill = X,
>   padx = "5m",
>   pady = "5m"
>   )
>
> self.quadro_pulsanti = Frame(quadro_grande)
> self.quadro_pulsanti.pack(
>   side = BOTTOM,
>   fill = X,
>   padx = "2m",
>   pady = "2m"
>   )
>
> import pickle
>
> quadri_eti = []
> eti_campi = []
> eti_val = []
> larg_eti_campi = max(map(len, miaApp.campi))
> f = open(nomefile, "r")
>
> valori = pickle.load(f)  ### Potrebbe generare una
> ### eccezione 'KeyError'
>
> larg_eti_val = max(map(len, valori))
> n = len(miaApp.campi)
> for i in range(n):
>   quadri_eti.append(None)
>   eti_campi.append(None)
>   eti_val.append(None)
>   quadri_eti[i] = Frame(quadro_grande)
>   quadri_eti[i].pack(side = TOP, expand = YES, fill = BOTH)
>   eti_campi[i] = Label(
>     quadri_eti[i],
>     text = miaApp.campi[i] + ": ",
>     width = larg_eti_campi,
>     anchor = E
>     )
>   eti_campi[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>   eti_val[i] = Label(
>     quadri_eti[i],
>     text = valori[i],
>     anchor = W,
>     width = larg_eti_val,
>     relief = SUNKEN
>     )
>   eti_val[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
> self.chiudi = Button(self.quadro_pulsanti)
> self.chiudi.configure(
>   text = "Chiudi",
>   command = self.premuto_chiudi
>   )
> self.chiudi.pack(side = LEFT, expand = YES)
>
>       except KeyError:  ### Eventualmente generato da
> ### 'pickle.load()'
>
> import tkMessageBox
>
> tkMessageBox.showwarning(
>   "Bad input",
>   "Illegal values, please try again"
>   )
>         self.destroy()
>
>       f.close()
>
>   def premuto_chiudi(self):
>     self.destroy()
>
> radice = Tk()
> radice.wm_title("Versione Python di un programma Java di G. Renda")
> radice.wm_iconname("giuseppe")
> radice.minsize(400, 300)
> miaApp = MiaApp(radice)
> radice.mainloop() 




From vincent at visualtrans.de  Thu Apr  7 14:27:46 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Thu, 7 Apr 2005 20:27:46 +0200
Subject: How to detect windows shutdown
References: <d303gk$btk$1@netnews.hinet.net>
	<F8WdnZpmZN6pc87fRVn-hQ@powergate.ca>
	<d32h4q$ifh$1@netnews.hinet.net>
Message-ID: <d33u31$115$1@news5.zwoll1.ov.home.nl>

"Austin" <austin at maxtronic.com.tw> schrieb im Newsbeitrag 
news:d32h4q$ifh$1 at netnews.hinet.net...
|I wrote a GUI program with wxPython.
| The error message is:
|
| Unhandled exception
| An unhandled exception occured. Press "Abort" to terminate the program,
| "Retry" to exit the program normally and "Ignore" to try to continue.
|
| Actually, besides the main program, there is another thread running
| background.
|
|
|
|
| > Austin wrote:
| >> I wrote a program running on windows.
| >> I put the link of the program in "Start up" folder and let it executed
| >> minimized.
| >> Every time when I open the computer, my program will be running in 
system
| >> tray.
| >>
| >> But if the user would like to shutdown the computer, the OS will show 
an
| >> error about exception.
| >
| > Important missing information:  is this a GUI program or
| > a console program, and if it's a GUI program, what framework
| > did you use to write it (wxPython, PyQt, other...)?  Also,
| > what is the exception that you got?  (Always report the
| > specific error: we can't guess what exception you got,
| > and the answer could well point directly to a cause that
| > is different than you think it is.)
| >
| > -Peter

Does this problem also occur when you "manually" exit the program (provided
you have a function to do so)?

If so, make sure you do something like self.tbicon.Destroy() -- with
self.tbicon being your instance of wx.TaskBarIcon() -- in your
event handler bound to wx.EVT_CLOSE.

HTH,

--

Vincent Wehren






From rkern at ucsd.edu  Mon Apr 25 10:13:34 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 07:13:34 -0700
Subject: what is the best way to determine system OS?
In-Reply-To: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
Message-ID: <d4itkr$3bl$1@sea.gmane.org>

googleboy wrote:
> Hi there.
> 
> I am writing a little app tha tI would like to make cross-platform
> (debian, RH, Fedora, Solaris, AIX, etc)
> 
> Originally I decided to check what uname returned, as I didn't think it
> mattered beyond the detail of Linux or SunOS etc.
> 
> Recently I have learned that FC3 breaks my script,  so I need to be
> able to determine not simply "Linux" but to know exactly what unix the
> script is being run on.
> 
> What is the best way to determine this?

Look at the platform module.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From maluke at gmail.com  Wed Apr  6 06:04:32 2005
From: maluke at gmail.com (Sergey Schetinin)
Date: 6 Apr 2005 03:04:32 -0700
Subject: regexp weirdness (bug?)
In-Reply-To: <1186100.a9ONk7P8cn@news.perlig.de>
References: <1112715308.737856.234580@z14g2000cwz.googlegroups.com>
	<2584344.b1EHUGjtUV@news.perlig.de>
	<mailman.1395.1112720052.1799.python-list@python.org>
	<1186100.a9ONk7P8cn@news.perlig.de>
Message-ID: <1112781872.088784.129280@g14g2000cwa.googlegroups.com>

it's line #159 here, but it did work! thanks. so it IS a bug?



From http  Wed Apr  6 21:30:33 2005
From: http (Paul Rubin)
Date: 06 Apr 2005 18:30:33 -0700
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<6p1951pop1pfh3j57r7gg568cn3bo4c7lg@4ax.com>
Message-ID: <7xr7hn8jba.fsf@ruckus.brouhaha.com>

John Machin <sjmachin at lexicon.net> writes:
> 1. What is an "interchange"?

Swapping two elements during the sort.

> 2. Without a definition that refers only to to the input and output,
> one would have to say that "interchange" implies "event" and so the
> number of interchanges would depend on the sorting method.

The number of interchanges depends on the sorting method, but whether
the number is odd or even is invariant.  Every permutation of elements
is either an odd permutation or an even permutation.

> 3. Of what practical use (or even esoteric academic interest) is the
> parity of the number of interchanges?

It is of considerable interest in combinatorics.  The group of even
permutations on N elements is called the alternating group A(N).
It's an order-2 subgroup of the symmetric group S(N) which is the
group of all the permutations on N elements.  The odd permutations
are of course a coset of A(N).


From Bill at SynectixLtd.com  Tue Apr 19 05:22:51 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Tue, 19 Apr 2005 09:22:51 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com><1113834504.919986.129180@z14g2000cwz.googlegroups.com><d40jm0$b93$1@sparta.btinternet.com>
	<mailman.2056.1113844188.1799.python-list@python.org>
Message-ID: <d42ilb$dk0$1@titan.btinternet.com>

Hi,
Many thanks for this.
I am constrained to use MSVC6 (customer) but will look to see if I can run 
VC7.1 alongside VC6.
However, I am still unable to decompress/unpack the downloaded source files 
even with their extensions amended.
Am I really the only person having this difficulty?
Hey ho,
    Bill

"James Carroll" <mrmaple at gmail.com> wrote in message 
news:mailman.2056.1113844188.1799.python-list at python.org...
Hi Bill,

Python 2.4 requires VC7.1 I just ran into this recently.  Once I
installed VC7.1, I could easily compile the Python source to create a
debug lib.

Winzip should be able to read the python source tarball... There is
one trick though.  Once you download it, it might get renamed to
python.tar.gz.tar  and the trick is to rename the file's extension to
.tar.gz or (my preference)  .tgz.

If it really is a bzip2 file, then you'll need some sort of bunzip.  I
use the cygnus version, but I don't remember having to do anything out
of the way for the python source.

-Jim

On 4/18/05, Bill Davy <Bill at synectixltd.com> wrote:
>
> "A.B., Khalid" <abkhd at earth.co.jp> wrote in message
> news:1113834504.919986.129180 at z14g2000cwz.googlegroups.com...
> > Bill Davy wrote:
> >> I downlaoded and installed
> >> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
> >>
> >> I'm trying to build an extension using SWIG 1.3.24 and the linker
> > needs
> >> python24_d.lib (I do not have the DLL either).  I've not found it in
> > any of
> >> the
> >> downloads.
>
> > I am no expert in MSVC6, but it sounds like maybe you need to supply
> > the no-debug switch in your extention setup.py file: /d NDEBUG.
> >
> > In case that does not work and help on this is not forthcoming, you can
> > always try pyMinGW[1].
> >
> >
> > Regards,
> > Khalid
>
> Hmm, that's one possibility but I really do need to keep the debugger
> version going.  I'm only just getting started.  Any other suggestions?
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
> 




From steve at holdenweb.com  Sun Apr 24 19:13:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 24 Apr 2005 19:13:16 -0400
Subject: Getting into Python, comming from Perl.
In-Reply-To: <426BFDED.5040004@amplitudenet.pt>
References: <mailman.2409.1114365369.1799.python-list@python.org>	<8664ycq7x6.fsf@guru.mired.org>
	<426BFDED.5040004@amplitudenet.pt>
Message-ID: <d4h8sr$n5n$2@sea.gmane.org>

Miguel Manso wrote:
> Mike Meyer wrote:
> 
>>Miguel Manso <mmanso at amplitudenet.pt> writes:
>>
>>  
>>
>>>I've tryed to use python some times but I get frustrated very quick. I
>>>get myself many times needing to figure out how to loop through a
>>>list, declare an associative array, checking how to pass named
>>>parameters to functions, and simple things like that.
>>>    
>>>
>>
>>I went through some of those frustrations.
>>
>>  
>>
>>>What I would like to know is if anyone had these problems and if you
>>>can share that experience with me. I'm trying to minimize my
>>>"frustration" :)
>>>    
>>>
>>
>>The thing is, the answers to all your questions are in the
>>documentation. You just need to know the Python names for things, and
>>not the Perl names. For instance, Python calls it's associative array
>>structure a dictionary, and a checking the documentation index for
>>dictionary turns up a link to the syntax for declaring one as
>>display/dictionary.
>>
>>Read through the tutorial. Then look through some "interesting"
>>modules in the standard library to see how these things fit together.
>>
>>        <mike
>>  
>>
> 
> I guess I'll just do that. I'll put the frustration in a bag, grab the 
> documentation and try to figure it out.
> 
> Thanks all.
> 
And, when the frustration returns, ask questions on c.l.py or the tutor 
list. By and large we don;t bite here, and the tutor list is 
particularly newbie-friendly, though with your Perl experience *that* 
may not be as appropriate.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bearophileHUGS at lycos.com  Mon Apr 25 19:33:40 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Apr 2005 16:33:40 -0700
Subject: Bounding box on clusters in a 2D list
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
	<1114378980.909132.216600@f14g2000cwb.googlegroups.com>
	<1114456596.990810.233630@z14g2000cwz.googlegroups.com>
	<1114457990.995627.224160@z14g2000cwz.googlegroups.com>
	<1114463614.451494.79010@o13g2000cwo.googlegroups.com>
	<1114466644.928560.284990@o13g2000cwo.googlegroups.com>
Message-ID: <1114472020.634684.285520@l41g2000cwc.googlegroups.com>

Then you can probably use something like this:

. def boxesArea(m, foreground=1, background=0):
.     maxr = len(m)
.     maxc = len(m[0])
.     newCol = 2
.     oldCol = foreground
.     for r,row in enumerate(m):
.         for c,e in enumerate(row):
.             if e == oldCol:
.                 # Flood fill by Lonnie Princehouse
.                 stack = [ (r, c) ]
.                 while stack:
.                     r, c = stack.pop()
.                     if c>=0 and c<maxc and r>=0 and r<maxr and
m[r][c]==oldCol:
.                         m[r][c] = newCol
.                         stack += [ (r+1, c), (r-1, c), (r, c+1), (r,
c-1) ]
.                 newCol += 1
.     box = {}
.     for r,row in enumerate(m):
.         for c,e in enumerate(row):
.             if e in box:
.                 box[e] = ( min(c, box[e][0]), min(r, box[e][1]),
.                            max(c, box[e][2]), max(r, box[e][3] ) )
.             else:
.                 box[e] = (c, r, c, r)
.     del box[background]
.     return [(b[2]-b[0]+1)*(b[3]-b[1]+1) for b in box.values()]
.
. try: import psyco
. except ImportError: pass
. else: psyco.bind(boxesArea)

Note that this version modifies the given m still.

Hugs,
Bearophile



From tomi.lindberg.NO_SPAM at pp.inet.fi.invalid  Sat Apr  9 00:20:27 2005
From: tomi.lindberg.NO_SPAM at pp.inet.fi.invalid (Tomi Lindberg)
Date: Sat, 09 Apr 2005 04:20:27 GMT
Subject: Unit tests in Leo
Message-ID: <fKI5e.3$7K4.2@read3.inet.fi>

I'm quite (or very) new to both unit testing and Leo. I've 
been trying to get @test nodes to work without success so 
I'd like to have very simple example.

So, if I have a @file with the following content...

def divide_by_two(x):
     return x/2

...and I'd like to write a @test node that checks whether 
the function returns the right number ( like 
assertsEqual(divide_by_two(8), 4) ). Now, what should the 
@test node look like?

-- 
"Nowhere in me is the presence of god
Nor do I need him or want him around"

     Deicide - Standing in the Flames

---
If you wish to send me an e-mail, remove .NO_SPAM and 
.invalid from the address.


From james at wrong.nu  Fri Apr 22 15:27:35 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Fri, 22 Apr 2005 20:27:35 +0100
Subject: gui developing
In-Reply-To: <116iir4hq8muc62@corp.supernews.com>
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<116iir4hq8muc62@corp.supernews.com>
Message-ID: <200504222027.40280.james@wrong.nu>

On Friday 22 April 2005 20:07, Grant Edwards wrote:

> I've never tried Qt.

Qt, in my opinion, is as excellent as python in the consistency stakes, has 
the best documentation bar none, an excellent set of python bindings, the 
best free layout tool, and an active and helpful community.

The killer, of course, is that there's no free windows port, so if you're 
doing free software that you want to run on linux then you're stuffed.

james.

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From Gerald.Klix at klix.ch  Fri Apr 15 02:23:17 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Fri, 15 Apr 2005 08:23:17 +0200
Subject: pythonic use of properties?
In-Reply-To: <5e183f3d05041420053ecd0ee@mail.gmail.com>
References: <5e183f3d05041420053ecd0ee@mail.gmail.com>
Message-ID: <425F5DD5.1060103@klix.ch>

The python rationale is "We are all consenting adults.".

You shoukd change "tens" to "_tens" and "ones" to "_ones", in order to
syntacticly mark these attributes as internal.
If someone not consenting, wants to mess with your internal
representation, it's his fault.

HTH,
Gerald



Marcus Goldfish schrieb:
> I'd like advice/opinions on when it is appropriate to do
> attribute/property validation in python.  I'm coming from a C#/Java
> background, where of course tons of "wasted" code is devoted to
> property validation.  Here is a toy example illustrating my question:
> 
> #   Example: mixing instance attributes with properties.  Is it pythonic to
> #   validate property data in setters?  Since tens and ones are never
> #   validated, the class can be "broken" by setting these directly
> class SillyDecimal(object):
>    """A silly class to represent an integer from 0 - 99."""
>    def __init__(self, arg=17):
>        if isinstance(arg, tuple):
>            self.tens = arg[0]
>            self.ones = arg[1]
>        else:
>            self.number = arg
> 
>    def getNumber(self):
>        return self.tens*10 + self.ones
>    def setNumber(self, value):
>        if value < 0 or value > 99:
>            raise ArgumentException("Must in [0, 99]")
>        self.tens = value // 10
>        self.ones = value % 10
>    number = property(getNumber, setNumber, None, "Complete number, [0-99]")
> 
> x = SillyDecimal()
> x.number, x.tens, x.ones        # returns (17, 7, 1)
> 
> Even though "tens", "ones" and "number" all appear as attributes, only
> "number" has its input validated.  Since the class is designed to only
> hold numbers 0 - 99, one can 'break' it by setting self.tens=11, for
> example.  Should tens and ones be made into full-fledged properties
> and validated?  Should number have no validation?  Is it more pythonic
> to encapsulate tightly, or rely on "responsible use."
> 
> Marcus

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634



From bill.oldroyd at bl.uk  Wed Apr 20 08:44:22 2005
From: bill.oldroyd at bl.uk (Bill Oldroyd)
Date: 20 Apr 2005 05:44:22 -0700
Subject: Redhat 9, Python 2.4.1, CGIHTTPServer problem
Message-ID: <191b8642.0504200444.7a2a3c04@posting.google.com>

I cannot get a simple CGI-script to work with this combination :

Redhat 9 Linux
Both Python 2.41. and ActiveState Python 2.4.1

either as an Apache 2 cgi-script or using CGIHTTPServer.

The same script works fine on Redhat 7.3.

The script fails at 230 in CGIHTTPServer :

     osexecve(scriptfile,args.os.environ)

the error message being 
OSError: [Errno 2] No such file or directory

Can anyone through any light on this problem ?. 

I have seen a few references to problems in this area, but nothing
that is helpful in solving the problem.

Bill


From roy at panix.com  Sat Apr  2 08:48:18 2005
From: roy at panix.com (Roy Smith)
Date: Sat, 02 Apr 2005 08:48:18 -0500
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
	<ixt3e.1907$7b.368@trndny01> <424e73a3.100782477@news.oz.net>
Message-ID: <roy-9BA12E.08481802042005@reader1.panix.com>

In article <424e73a3.100782477 at news.oz.net>, bokr at oz.net (Bengt Richter) 
> Is there a package that is accessible without svn?

That seems to be its weak point right now.

Fortunately, you can get pre-built svn clients for many platforms 
(http://subversion.tigris.org/project_packages.html#binary-packages), and 
from there you just have to run a single command (svn get URL).  Still, the 
py.test folks would be doing themselves a favor if they made it available 
with more common tools.


From cdkrug at worldnet.att.net  Thu Apr 21 10:43:21 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Thu, 21 Apr 2005 14:43:21 GMT
Subject: How can I verify that a passed argument is an interible collection?
Message-ID: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>

List:

I'm working on some methods that operate on (mathematical) vectors as
in:

def Convolution(x, y)
"""Returns a list containing the convolution of vectors x and y"""

Is there any way to determine at runtime that x and y are iterible
collections?

Do I *coughs* simply *coughs* trap the exception created by:

    for v in x:

when v is a scaler quantity?

Thanks


Charles



From bedouglas at earthlink.net  Mon Apr 18 10:07:26 2005
From: bedouglas at earthlink.net (bruce)
Date: Mon, 18 Apr 2005 07:07:26 -0700
Subject: trying to parse a file...
Message-ID: <029101c5441f$f3ff31b0$0301a8c0@Mesa.com>

hi,

i'm trying to modify an app (gforge) that uses python to do some file
parsing/processing...

i have the following shell file that uses python. if i understand it
correctly, it's supposed to modify the 'viewcvs.conf' file, and
replace/update the section with 'svn_roots'.

it isn't working correctly... can anybody tell me what i need to do?
basically, i'd like to continually add to the svn_root: block with an
additional line as required. also, can someone tell me what i'd need to do,
if i wanted to remove a line of text from the 'svn_root' block if i had a
given 'test_x:'

thanks

bruce
bedouglas at earthlink.net

-----------------------------------------------------------
viewcvs.conf:
  .
  .
  .
  #
  # This setting specifies each of the Subversion roots (repositories)
  # on your system and assigns names to them. Each root should be given
  # by a "name: path" value. Multiple roots should be separated by
  # commas and can be placed on separate lines.
  #
  #svn_roots = test2: /svn-gforge/uploadsvn
  svn_roots = test5: /gforge-svn/test7/svn,
              test2: /gforge-svn/test7/svn,
              test3: /gforge-svn/test7/svn,

  # The 'root_parents' setting specifies a list of directories in which
  # any number of repositories may reside.  Rather than force you to add
  .
  .
  .
-----------------------------------------------------------




[root at lserver2 bin]# cat test.sh
-----------------------------------------------------------
#! /bin/sh

python <<EOF
import sys
import os
import string
import ConfigParser
r = ConfigParser.RawConfigParser ()
r.read ("/etc/viewcvs/viewcvs.conf")
r.set ("general","svn_roots","")
l = os.listdir ("/var/lib/gforge/chroot/svnroot")
l2 = []
for d in l:
  l2.append (d + ": svn://localhost/" + d)
r.set ("general","svn_roots",string.join (l2, ', '))
r.set ("general","cvs_roots","")
r.set ("general","default_root", l [0])
r.write (open ("/var/lib/gforge/etc/viewcvs.conf", "w"))
EOF

sed 's,pathname = CONF_PATHNAME .*,pathname =
"/var/lib/gforge/etc/viewcvs.conf",' \
    /usr/lib/python2.3/site-packages/viewcvs/viewcvs.py >
/var/lib/gforge/etc/viewcvs.py
-----------------------------------------------------------





From MichaelMurdock at gmail.com  Wed Apr  6 15:28:05 2005
From: MichaelMurdock at gmail.com (Michael)
Date: 6 Apr 2005 12:28:05 -0700
Subject: I've broken PythonWin2.4 - Dialogs don't pop up!
Message-ID: <1112815685.437815.285680@f14g2000cwb.googlegroups.com>

I have broken PythonWin and I don't know how or why. It worked great
until recently. I have installed / removed several apps since it worked
last. I could have a virus unknown to my antivirus program, I guess.
I'm stumped.


---------- The Symptoms ---------------------

Here's what happens. I fire up PythonWin without opening a python file.
Everything looks good - the interactive window is at the bottom of the
main dialog and I can type python code into it and it seems to work
fine. But if I select anything from the menu or toolbar that requires a
new dialog box to pop up, either:

1. Nothing happens - it acts like it popped up the dialog, but it's not
there. At least I can't see it.

2. I get an error down in the interactive window

3. I get a windows error telling me that the program is now going to
crash.

4. PythonWin just disappears off my screen - all the processes seem to
die.

Note: Sometimes I can't even get a menu item to respond, but that's not
very often.

--------- Examples -----------------

Example #1. If I select "Edit Python Path" I get the following message
in the interactive window:

>>> Failed to execute command:
from pywin.tools import regedit;regedit.EditRegistry()
Traceback (most recent call last):
  File
"C:\Python24\Lib\site-packages\pythonwin\pywin\framework\toolmenu.py",
line 103, in HandleToolCommand
    exec "%s\n" % pyCmd
  File "<string>", line 1, in ?
  File
"C:\Python24\Lib\site-packages\pythonwin\pywin\tools\regedit.py", line
323, in ?
    template = RegTemplate()
  File
"C:\Python24\Lib\site-packages\pythonwin\pywin\tools\regedit.py", line
245, in __init__
    docview.DocTemplate.__init__(self, win32ui.IDR_PYTHONTYPE, None,
SplitterFrame, None)
  File "C:\Python24\Lib\site-packages\pythonwin\pywin\mfc\docview.py",
line 71, in __init__
    self._SetupSharedMenu_()
  File "C:\Python24\Lib\site-packages\pythonwin\pywin\mfc\docview.py",
line 74, in _SetupSharedMenu_
    sharedMenu = self.GetSharedMenu()
win32ui: The template has no menu


Example #2. If I try to open a file by selecting "open" from the "file"
menu or by hitting the icon on the toolbar, I almost always get the
behavior in which it acts like the File Open dialog box was displayed,
but it's not.

Example #3. If I hit the "?" icon on the toolbar, I get the following
error message:

File "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\app.py",
line 307, in OnHelpAbout
    win32ui.InitRichEdit()
win32ui: AfxInitRichEdit failed
win32ui: Error in Command Message handler for command ID 57664, Code 0

------------- Here's what I know --------------

My Machine:

 + I am on WinXP-Pro using Python 2.4:

 + In the interactive Window this is what is says: PythonWin 2.4 (#60,
Feb  9 2005, 19:03:27) [MSC v.1310 32 bit (Intel)] on win32.

 + The first item in my PATH env variable is: C:\Python24\.

 + From the PythonWin About box: Python 2.4 pywin32 extensions (build
203).

 + In my system registry, In HKEY_LOCAL_MACHINE\SOFTWARE\Python, I have
one entry: PythonCore and it has two sub-entries: 2.3 and 2.4.
Everything looks similar between the two and the registry data for
Python2.4 seems fine:

InstallPath = c:\Python24\
InstallGroup = ActiveState ActivePython2.4
PythonPath = C:\Python24\Lib;C:\Python24\DLLs;C:\Python24\Lib\lib-tk


The only dialog box that always correctly pops up is the About box from
the help menu.

I have Python 2.3 installed in an adjacent directory to my 2.4 version.
I can go down into the Python2.3 directories to PythonWin, which is
actually ver 2.3.4, and fire up PythonWin and I don't have any of these
problems.

After I have a problem with PythonWin2.4 I notice weird UI behavior
from my other apps until I kill PythonWin.


Any ideas?

Thanks,

~Michael.



From mark.greenbank at gmail.com  Sat Apr  9 17:11:01 2005
From: mark.greenbank at gmail.com (mark.greenbank at gmail.com)
Date: 9 Apr 2005 14:11:01 -0700
Subject: email and smtplib modules
Message-ID: <1113081060.969295.36900@o13g2000cwo.googlegroups.com>

Hi,

I'm writing a small script that generates email and I've noticed that:

1) one should add the 'To' and 'CC' headers to the email message
2) one needs to specify the recipients in the smtplib sendmail() method

Can someone explain how these are related?

Thanks,
Mark



From alex at quad.com.ar  Mon Apr 25 10:59:50 2005
From: alex at quad.com.ar (Alex)
Date: Mon, 25 Apr 2005 11:59:50 -0300
Subject: Python, Perl & PDF files
In-Reply-To: <d4iv1b$mfn$1@solaris.cc.vt.edu>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
Message-ID: <426D05E6.8060902@quad.com.ar>

rbt wrote:

> I just want to read PDF files in a portable way (windows, linux, mac) 
> from within Python.


reportlab is an excelent tool for generating pdf files, but as far as I 
know, it doesn't "read" pdf's.
http://www.reportlab.org/rl_toolkit.html

there's a project in sourceforge called pdf playground.
http://sourceforge.net/projects/pdfplayground

it's supposed to read/write pdf files..
I never tried it, you might want to check it out.

I don't think there's something like perl's pdf support on python.
but you can find tools and libs that might help.

regards,
Alex



From bokr at oz.net  Fri Apr  1 16:14:20 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 01 Apr 2005 21:14:20 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
Message-ID: <424db34c.51543105@news.oz.net>

On Fri, 01 Apr 2005 16:34:32 GMT, "Raymond Hettinger" <vze4rx4y at verizon.net> wrote:

>[Peter Otten]
>> a StopIteration raised in a generator expression
>> silently terminates that generator:
>>
>> >>> def stop(): raise StopIteration
>> ...
>> >>> list(i for i in range(10) if i < 5 or stop())
>> [0, 1, 2, 3, 4]
>>
>> In a list comprehension, on the other hand, it is propagated:
>>
>> >>> [i for i in range(10) if i < 5 or stop()]
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>>   File "<stdin>", line 1, in stop
>> StopIteration
>>
>> Is that an intentional difference?
>
>I would call it an unfortunate assymmetry -- one the never comes up unless
>you're up to no good ;-)
;-)
>
>In a way, both behave identically.  They both raise StopIteration.  In the case
>of the generator expression, that StopIteration is intercepted by the enclosing
>list() call.  That becomes obvious if you write a pure python equivalent for
>list:
>
>    def lyst(s):
>        it = iter(s)
>        result = []
>        try:
>            while 1:
>                result.append(it.next())
>        except StopIteration:        # guess who trapped StopIter
>            return result
>
>
I assumed that all standard sequence consumers (including list, of course) would intercept
the StopIteration of a sequence given them in the form of a generator expression, so your
lyst example would have an analogue for other sequence consumers as well, right?
I.e., there's not a hidden list(genex) in those others I would hope ;-)

E.g., "in" in my toy exposed more clearly, using Peter's stop:

 >>> def show(x): print x,; return x
 ...
 >>> def stop(): raise StopIteration
 ...
 >>> 2 in (x for x in xrange(5) if show(x)<4 or stop())
 0 1 2
 True
 >>> 7 in (x for x in xrange(5) if show(x)<4 or stop())
 0 1 2 3 4
 False

BTW I notice that this also nicely shortcuts when the 2 is found.

Regards,
Bengt Richter


From steven.bethard at gmail.com  Wed Apr 13 03:30:40 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 01:30:40 -0600
Subject: Doubt regarding sorting of a list specific field
In-Reply-To: <X5idnYt-5fFIVMHfRVn-hA@comcast.com>
References: <mailman.1817.1113371391.1799.python-list@python.org>
	<6omdnTAhJfc-W8HfRVn-oQ@comcast.com>
	<425cc854$0$1959$626a14ce@news.free.fr>
	<X5idnYt-5fFIVMHfRVn-hA@comcast.com>
Message-ID: <X5idnYp-5fEDV8HfRVn-hA@comcast.com>

Steven Bethard wrote:
> See my other post in this thread.  seq.sort() is not stable;

Hmmm...  That didn't come out right.  list.sort *is* stable.  It's just 
that if you want to sort only by the first element of each tuple in a 
list, then list.sort won't produce results that are stable under this 
criterion.

STeVe


From skip at pobox.com  Wed Apr 20 14:05:43 2005
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 20 Apr 2005 13:05:43 -0500
Subject: Python Debugger with source code tracking ability
In-Reply-To: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
References: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
Message-ID: <16998.39415.612976.398205@montanaro.dyndns.org>


    Tran> I am new to Python and desperated to look for a good Python
    Tran> debugger.  I mean a debugger with source coding tracking. For
    Tran> C/C++, emacs and gud offers execellent development env. The source
    Tran> code tracking is extremely useful for recursive functions.

There is some support for pdb (the Python debugger) in python-mode.  Google
around for pdbtrack.  Also, look at Misc/gdbinit in a recent Python
distribution (or use viewcvs in the CVS tab of Python's sourceforge project)
for some gdb magic.

Skip


From Mccormick.Johnw at epamail.epa.gov  Mon Apr 11 11:06:17 2005
From: Mccormick.Johnw at epamail.epa.gov (Mccormick.Johnw at epamail.epa.gov)
Date: Mon, 11 Apr 2005 11:06:17 -0400
Subject: Checking for the status of a device (before connection)... -- (John
 McCormick)
Message-ID: <OFBFB44AE5.8DCBA0FB-ON85256FE0.0051C8FA-85256FE0.0052F909@epamail.epa.gov>

Hello, ... I am John McCormick (Systems Programmer ) and I am currently
working on a python program which will connect (user) specified inputs
and connect them to (user) selected outputs (like screen or
video/audio-recording devices) and would like to know if there's a
technique to "test" or "sense" if the desired output device is busy
without interrupting the output device while checking to see if it's
busy... ?? If, perhaps, python does not have this type of feature, I
wonder if you could give me some type of direction (ie., manufacturer's
device response checking techniques that could be used in conjunction
with python) but the bottom line is not to "crash" or interrupt the
desired output device (if it's still busy)...

Thank You



John McCormick



##############################################
John W. McCormick, Systems Programmer / DBA
High Performance Computing & Scientific Visualization
Lockheed Martin Information Technology, Supporting the EPA
Research Triangle Park, NC
919-541-0890

Federal Infrastructure Contact - Ravi Nair
919-541-5467    -  nair.ravi at epa.gov
Federal Infrastructure Contact - Joe Retzer, Ph.D.
919-541-4190    -  retzer.joseph at epa.gov



From pyguy2 at gmail.com  Fri Apr 22 08:29:48 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 22 Apr 2005 05:29:48 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <7xk6mvh5cn.fsf@ruckus.brouhaha.com>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
Message-ID: <1114172988.809457.36220@l41g2000cwc.googlegroups.com>

click on my computer
Then select tools->folder options->File Types

scroll down the where the py extension is defined, highlight it, click
on advanced
then highlight open and hit the edit button.

There you should see python.exe with some other stuff, change it to
pythonw.exe

Then, in the future,  if you click on a python program, it should use
pythonw.exe
The steps should be roughly similar on different versions of windows.

I always liked the #! syntax of unix, too bad MS doesn't have it. And,
too bad their command prompt sucks, too bad process creation is heavy,
too bad . . .



From deetsNOSPAM at web.de  Wed Apr  6 16:20:20 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 06 Apr 2005 22:20:20 +0200
Subject: Python sleep doesn't work right in a loop?
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
Message-ID: <d31g9v$k6j$01$1@news.t-online.com>


> Nope. Does't work. Running Python 2.3.4 on Debian, Linux kernel 2.6.
> This is actually test code for a larger project...

No Nope - it _does_ work. Did you actually try it? Because you use it in a
wrong context does not mean that it doesn't work. Besides, giving a wrong
example to prove a point is always a bad idea. 

> # flash the selected wx.TextControl
> 
> for flasher in range(4):
>     self.textField.SetBackgroundColour(255, 0, 0)
>     time.sleep(0.8)
>     self.textField.SetBackgroundColour(255, 255, 223)
>     time.sleep(0.8)
> 
> Even when I add an explicit call to repaint the TextCtrl between each
> sleep, things appear to be 'queued' until after the loop is fnished.
> Very bizarre.

That's a totally different thing - no idea how wx works in detail, but the
behaviour you describe looks as if the calls to SetBackgroundColour are
queued until the event loop is processed again. So check how to do that
manually between calls, and things are most probably working.

Again - giving the above example would made us give you that advice way
earlier - and saved us digging in the wrong direction...

-- 
Regards,

Diez B. Roggisch


From john at castleamber.com  Wed Apr 27 03:15:51 2005
From: john at castleamber.com (John Bokma)
Date: 27 Apr 2005 07:15:51 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<86is2anqbj.fsf@guru.mired.org>
	<Xns964467144Dcastleamber@130.133.1.4>
	<86r7gym0rq.fsf@guru.mired.org>
Message-ID: <Xns964516D058372castleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <john at castleamber.com> writes:
> 
>> Mike Meyer wrote:
>>
>>> John Bokma <john at castleamber.com> writes:
>>>> You already showed code like:
>>> Actually, I never showed you this code.
>> hence *like*, and yes you did, in a footnote.
> 
> Yes, but *I* didn't say like, because I wanted to point out that you
> had purposely uglified it.

your footnote:
"
*) I still remember seeing FORTRAN programmers writing ALGOL-W
conditionals as:

             if not condition then
             else
                begin
                code
                end
"

mine purposely uglified version:

"
if condition then
   nothing
else
   something
"

> If you want to program in a normal language, I recommend
> COBOL. Natural languages have a different purpose than programming
> languages, which are designed to communicate algorithms clearly and
> concisely. In that domain, it's just bloat.

I, and I am sure I am not alone, consider unless not just bloat. To me 
it serves a purpose: "communicate algorithms clearly" :-)

>>> What you created was a list. Not in Python or Perl, but in English.
>> I doubt if any Perl programmer in the given context would have any 
>> problem with it, but lets drop it.
> 
> No, let's not. It's a perfect example of why having multiple ways to
> do things is a bad idea.

Ok, again:

"
> an obvious solution (sort a list; split a string on whitespace; pull
> select list elements based on a criteria of some kind; search a file
> for lines with a given word in them; etc.) you'd get back the same
> answer from almost all of them.

And what makes you doubt it would be different with Perl? :-D

( sort @alist, split ' ', $astring, grep criteria, @list, etc )
"

I skip over your "grep is wrong, should be map", and "split is also 
wrong":

The most funniest reply I ever read:

"
You also chose the wrong way to do things globally, by leaving off the
optional parens on the function invocations. That makes the list a
PITA to parse, in that you have to know the number of arguments to
each function in order to parse the list you provided.

Consider the python version:

         (alist.sort(), astring.split(), [x for x in alist if criteria
(x)])
"

I mean, that last part is extremely weird, I mean, in your original 
question you use ; to separate each question: how does Python parse 
that? Really Mike, give it up: you gave a few problems, I answered a 
few, everyone could have seen that I separated each solution with a 
comma, (almost each keyword is a dead giveaway since they match the word 
in your original question). And you are suddenly saying that the way I 
decided to write my answer says something about Perl? How much rope do 
you need?

Moreover, in your reply you clearly showed that you mixed up map and 
grep. Those are quite fundemental building blocks in perl, it's like 
mixing up an array with a hash. 

>>> Oh, I understood it.
>> Sure, is that why you talked about a tuple? But, lets drop it.
> 
> No, I talked about a tuple to point out that doing it right made
> something a machine could parse properly, with no thought at all.

So you have been assimilated by the borg then? And do you think one 
can't write a parser that is able to correctly parse my reply? I give 
you a hint:

if a comma is followed by a keyword (bareword), it's a new statement. 
etc is a no-op statement. Or should my answer be pure Perl? Is your 
group of problems pure python? Perl?

> Trying to argue that I'm wrong because I'm wrong about Perl's behavior
> being bad would be a lot more effective if you pointed out where the
> descriptions of bad behavior were incorrect.

If you can't distinguish map from grep, have problems with split (and 
maybe even white space), and have parsing problems (e.g. see a Perl list 
where there is none), it's going to be a bit hard, don't you think?

>> real time guaranteed memory allocation/deallocation (which might be 
>> fixed by now in Java)
> 
> That's an implementation feature, not a language feature.

*sigh*

> That's an
> implementation feature, not a language feature. I might also note that
> you're wrong about alloc/free, in that you don't get real time
> guaranteed memory allocation/deallocation with it, either.

That depends on the platform, of course.

[ memory allocation and freeing bugs ]
> I'd say you've never done anything but trivial

For someone who claims to maintain perl code but mixes up grep and map, 
and seems to have a hard time at understanding Perl in general, this is 
quite a bold statement, to say the least.

> Righ - you once again avoid the real issue.

The real issue seems to be your *lack* of Perl skills.

>> I have no idea if this has changed recently. The last thing I read
>> about it is that there are 4 kinds of garbage collection one can
>> select in Sun's implementation.
> 
> If you had enough experience with jvm's, you'd know that Sun's wasn't
> the only one out ther.

If your English reading skills where sufficient enough, you would have 
been able to understand from my use of the word implementation that I am 
aware of this. You want me to spell it out in Perl? Oh, no wait... >:->

>>> A good programmer won't immediately abandon either
>>> Java or garbage collection. They'd check out other implementations
>>> of the jvm to see if one of those has a better garbage collector.
>> Uhm, people often pick Java because of write once, run everywhere. So
>> that is not always, or even rarely an option.
> 
> Switching jvm's doesn't mean you switch away from Java. It means you
> switch the implementation of the jvm that Java is running on. "Run
> anywhere" has nothing to do with this.

Maybe do some research into which jvm's are available for which 
platforms, and also the problems some people have run into because "Run 
anywhere" is not that easy even if there is a jvm "anywhere". But again, 
maybe this all has recently changed.

>> I didn't say better, what I meant: there are situations real time 
>> free/alloc is prefered, unless my knowledge of gc in general is 
>> outdated.
> 
> Your knowledge of free/alloc is wrong. They don't guarantee real time
> behavior. Nor do they guarantee memory allocations.

Weird, I have worked on enough platforms where both are the case, if you 
know what you are doing. Maybe that's the difference ;-)

> I'm beginning to think your programming experience is limited.

Coming from a Perl "maintainer" that mixes up map and grep, that's quite 
a bold statement. Even if you are right (which you are not), I doubt you 
are qualified to make such a statement.

[ for is a synonym for foreach ]
> You didn't bother refuting the point that you've created a subset of
> Perl which never uses "foreach".

And you think that someone who *did* bother to learn Perl has a problem 
with reading my for's? Is slowed down? Has to stop, think, read up the 
documentation, is confused, etc?

I recommend to buy Learning Perl. I am sure that a skilled programmer, 
as you claim to be, can finish reading it in 3 hours. Re-read it again, 
and make some notes.

>> Weird: I am going study Python for at least one year. Unless you call
>> that a quick survey :-D.
> 
> That's enough time to become proficient in a language. Which isn't
> required if all you want to do is decide if it's well-designed.

Let's just say that I define "proficient in a language" different.

>>> A good understanding of toolset design allows you to point out flaws
>>> in a toolset without becoming intimately familiar with it. For
>>> instance, mutliple nearly identical ways to express the same
>>> construct is always a flaw in a toolset. Which has been the point
>>> I've been making the whole time.
>> So a hammer is a bad tool, since one can use a scewdriver...
> 
> I didn't say a word about bad tools.

Ok, flawed.

>> I always wondered why an artist, like for example a painter, has so
>> many nearly identical tools...
> 
> Because they do different things with them.

Yup.

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


From max at alcyone.com  Tue Apr 19 03:07:08 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 19 Apr 2005 00:07:08 -0700
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <mailman.2082.1113893816.1799.python-list@python.org>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
	<mailman.2082.1113893816.1799.python-list@python.org>
Message-ID: <b4-dnXP9eNSBM_nfRVn-hg@speakeasy.net>

Fredrik Lundh wrote:

> did you check that link before you posted it?

Works here.  Your browser is probably concluding the trailing . is part 
of the URL, rather than sentence punctuation :-).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Dear World: I am leaving because I am bored.
   -- George Sanders (in his suicide note)


From steve at holdenweb.com  Tue Apr 26 00:03:44 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 00:03:44 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <1114477978.067147.293900@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<mailman.1813.1113355346.1799.python-list@python.org>	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>	<d4jec2$20g$1@sea.gmane.org>	<mailman.2485.1114456610.1799.python-list@python.org>
	<1114477978.067147.293900@z14g2000cwz.googlegroups.com>
Message-ID: <d4ke94$6mi$1@sea.gmane.org>

Xah Lee wrote:
> Dear Steve Holden,
> 
> the rewrite of the regex doc is instigated by your offer.
> 
> it is published and announced here on April 18th.

I'll have to take your word for that.

  If you deem it
> proper, paypal me. It will be to your credit and easier to incorporate
> into the main doc.
> 
I still await the specified five emails preferring your version to the 
current documentation.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From rixdelei at hotmail.com  Mon Apr 11 20:56:23 2005
From: rixdelei at hotmail.com (rixdelei)
Date: Tue, 12 Apr 2005 02:56:23 +0200
Subject: help: loading binary image data into memory
Message-ID: <d3f6bo$2thb$1@news.wplus.net>


Hi there!
Tried successfully downloading data into memory from internet using the 
urllib module like this:
...
import urllib
import cStringIO

url_file = urllib.urlopen(url)
img = cStringIO.StringIO(url_file.read())
...
Was wondering HOW could I accomplish the same results using the ftplib 
module
-> retrbinary( command, callback[, maxblocksize[, rest]])
WITHOUT saving any information to the disk;

Will appreciate your comments,
TIA+BRGDS 




From bogus@does.not.exist.com  Wed Apr  6 15:55:02 2005
From: bogus@does.not.exist.com ()
Date: Wed, 06 Apr 2005 19:55:02 -0000
Subject: (no subject)
Message-ID: <mailman.28.1572215980.3356.python-list@python.org>

#! rnews 2135
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: Best editor?
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqx7jjfhf5r.fsf at cola2.ca.boeing.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Lines: 49
Sender: hgg9140 at cola2.ca.boeing.com
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References: <1112725379.514651.66540 at l41g2000cwc.googlegroups.com> <xqxll7wougu.fsf at cola2.ca.boeing.com> <mailman.1437.1112801727.1799.python-list at python.org> <1112805967.208689.96100 at o13g2000cwo.googlegroups.com>
Mime-Version: 1.0
Date: Wed, 6 Apr 2005 19:35:28 GMT
Xref: news.xs4all.nl comp.lang.python:371180

"ChinStrap" <caneff at gmail.com> writes:

> Well I would be more than willing to learn Emacs if it does all these
> things you speak of, but really I can't get started because the default
> scheme is so friggin ugly it isn't funny.
> 
> Anyone want to send me a configuration setup with Python in mind, and
> decent colors?
> 

Set .emacs for:
;;; basic
(set-background-color "white")
(set-foreground-color "black")
(set-border-color "black")
(setq column-number-mode t)
(setq dired-ls-F-marks-symlinks t)

Do that prior to the python settings:
;---python---------------------------
(load "python-mode")
(setq auto-mode-alist
      (cons '("\\.py$" . python-mode) auto-mode-alist))
(setq interpreter-mode-alist
      (cons '("python" . python-mode)
            interpreter-mode-alist))
(autoload 'python-mode "python-mode" "Python editing mode." t)
(add-hook 'python-mode-hook 'turn-on-font-lock)
(setq python-mode-hook 'python-initialise)
(defun python-initialise ()
  (interactive)
  (setq default-tab-width 4)
  (setq indent-tabs-mode nil)
)


Then the default color scheme looks ok (at least to me).
The critical command is:
(add-hook 'python-mode-hook 'turn-on-font-lock)

If you comment that out (with a leading ";"), then font coloring is
turned off and you just have black on white.  You can learn the
language and the editor in that mode if necessary.


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718
#! rnews 1727
Xref: xyzzy comp.security.ssh:39215
Newsgroups: comp.security.ssh
Path: xyzzy!nntp
From: "Mike Lowery" <michael.j.lowery at boeing.com>
Subject: Re: Ignoring known_hosts
X-Nntp-Posting-Host: e458612.nw.nos.boeing.com
Message-ID: <IEJIG6.L3M at news.boeing.com>
X-Mimeole: Produced By Microsoft MimeOLE V6.00.2800.1441
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Organization: The Boeing Company
X-Newsreader: Microsoft Outlook Express 6.00.2800.1437
References: <IEA950.D3r at news.boeing.com> <m2psxdzzho.fsf at darwin.oankali.net> <IEHE76.3Dp at news.boeing.com> <m2br8szd6w.fsf at darwin.oankali.net>
Date: Wed, 6 Apr 2005 19:36:09 GMT


"Richard E. Silverman" <res at qoxp.net> wrote in message
news:m2br8szd6w.fsf at darwin.oankali.net...
> >>>>> "Mike" == Mike Lowery <michael.j.lowery at boeing.com> writes:
>
>     >> [~/.ssh/known_hosts]
>     >>
>     >> foo [foo's key ...]  bar [foo's key ...]
>     >>
>     >> [~/.ssh/config]
>     >>
>     >> host foo hostname <foo's name or address> hostkeyalias foo
>     >>
>     >> host bar hostname <bar's name or address> hostkeyalias bar
>     >>
>     >> ... and use "ssh {foo|bar}".
>
>     Mike> This might work
>
> It will work.
>
>     Mike> but again, it requires me manually adding each server to the
>     Mike> config file which I'm hoping to avoid since there are many.
>
> How?  If your machines are not uniquely identified to the client by their
> names or addresses, then you must indicate the distinctions yourself by
> configuration.

How?  Tell SSH to stop checking for this potential "problem." I don't care that
the key doesn't match what it was last time, just give me access!  Apparently
that option doesn't exist.




From peter at engcorp.com  Wed Apr 20 23:06:51 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 23:06:51 -0400
Subject: memory profiler?
In-Reply-To: <slrnd6dv59.j93.jtr@ofb.net>
References: <slrnd6dv59.j93.jtr@ofb.net>
Message-ID: <-ISdnfAtjJdEhfrfRVn-uQ@powergate.ca>

John Reese wrote:
> Is there a memory or heap profiler for python programs?  So that, for
> example, if a program was bloating over time I could see how many of
> each object there were and maybe even where the references were?

The "gc" module has a variety of helpful features
like that.

-Peter


From usenet at zabiello.com  Tue Apr 26 19:35:43 2005
From: usenet at zabiello.com (JZ)
Date: 26 Apr 2005 16:35:43 -0700
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
	<IFEpEp.7Gz@bath.ac.uk>
	<mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
Message-ID: <1114558543.276438.210890@f14g2000cwb.googlegroups.com>

PHP can do the same. For ADOdb (excelent database wrapper)it can be as
the following:

$conn->Execute('UPDATED foo SET bar=? WHERE id=?', array("foo'bar",
123));



From rkern at ucsd.edu  Mon Apr 25 01:59:12 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 24 Apr 2005 22:59:12 -0700
Subject: What's do list comprehensions do that generator expressions
	don't?
In-Reply-To: <86ll77pgqz.fsf@guru.mired.org>
References: <86ll77pgqz.fsf@guru.mired.org>
Message-ID: <d4i0m1$cj2$1@sea.gmane.org>

Mike Meyer wrote:
> Ok, we've added list comprehensions to the language, and seen that
> they were good. We've added generator expressions to the language, and
> seen that they were good as well.
> 
> I'm left a bit confused, though - when would I use a list comp instead
> of a generator expression if I'm going to require 2.4 anyway?

Never. If you really need a list

list(x*x for x in xrange(10))

Sadly, we can't remove list comprehensions until 3.0.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From simon.brunning at gmail.com  Fri Apr 22 06:28:02 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 22 Apr 2005 11:28:02 +0100
Subject: Run Unix shell command $ parse command line arguments in python
In-Reply-To: <1114164962.105996.299460@z14g2000cwz.googlegroups.com>
References: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>
	<mailman.2277.1114159863.1799.python-list@python.org>
	<1114164962.105996.299460@z14g2000cwz.googlegroups.com>
Message-ID: <8c7f10c6050422032834f5a124@mail.gmail.com>

On 22 Apr 2005 03:16:02 -0700, hue <prasad413in at gmail.com> wrote:
> Thanks for your reply
> 
> I started writing the script.. I have gone through documentation for
> getopt

(snip)

Good start. I tend to prefer optparse over getopt these days, but if
you've got it working the way you want it, you should probably stick
with what you have.

> with the above code, I am planning to do command line parsing. But how
> to run unix shell command? DO i have to use os Module/  import command?
> 
> How should i proceed further, to
>  import commands
>  commands.getstatusoutput('ls /bin/ls')

You'll certainly need to import *something*. Have you looked at the
subprocess module?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From could.net at gmail.com  Thu Apr  7 03:26:12 2005
From: could.net at gmail.com (could ildg)
Date: Thu, 7 Apr 2005 15:26:12 +0800
Subject: how can I extract all urls in a string by using re.findall() ?
In-Reply-To: <2ab2ed55050406202960cc1382@mail.gmail.com>
References: <311b5ce105040619052e00e10c@mail.gmail.com>
	<2ab2ed55050406202960cc1382@mail.gmail.com>
Message-ID: <311b5ce1050407002636ebf957@mail.gmail.com>

That's it! Thank you~~

On Apr 7, 2005 11:29 AM, Sidharth Kuruvila <sidharth.kuruvila at gmail.com> wrote:
> Reading the documentation on re might be helpfull here :-P
> 
> findall returns a tuple of all the groups in each match.
> 
> You might find finditer usefull.
> 
> for m in re.finditer(url, html) :
>     print m.group()
> 
> or you could replace all your paranthesis with the non-grouping
> version. That is, all brackets (...) with (?:...)
> 
> 
> On Apr 7, 2005 7:35 AM, could ildg <could.net at gmail.com> wrote:
> > I want to retrieve all urls in a string. When I use re.fiandall, I get
> > a list of tuples.
> > My code is like below:
> >
> > [code]
> > url=unicode(r"((http|ftp)://)?(((([\d]+\.)+){3}[\d]+(/[\w./]+)?)|([a-z]\w*((\.\w+)+){2,})([/][\w.~]*)*)")
> > m=re.findall(url,html)
> > for i in m:
> >    print i
> > [/code]
> >
> > html is a variable of string type which contains many urls in it.
> > the code will print many tuples, and each tuple seems not to represent
> > a url. e.g, one of them is as below:
> >
> > (u'http://', u'http', u'image.zhongsou.com/image/netchina.gif', u'',
> > u'', u'', u'', u'image.zhongsou.com', u'.com', u'.com',
> > u'/netchina.gif')
> >
> > Why is there two "http" in it? and why are there so many ampty strings
> > in the tupe above? It's obviously not a url. How can I get the urls
> > correctly?
> >
> > Thanks in advance.
> > --
> > ????????????????????
> > ????????????????
> > ????????
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> 
> --
> http://blogs.applibase.net/sidharth
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


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


From maluke at gmail.com  Tue Apr  5 11:35:08 2005
From: maluke at gmail.com (Sergey Schetinin)
Date: 5 Apr 2005 08:35:08 -0700
Subject: regexp weirdness (bug?)
Message-ID: <1112715308.737856.234580@z14g2000cwz.googlegroups.com>

Here's the session log:

>>> _re_pair="(?(plus).|-)"
>>> _re1=("(?P<plus>\+)"+_re_pair)
>>> _re2=("((?P<plus>\+))"+_re_pair)
>>> _re3=("(?:(?P<plus>\+))"+_re_pair)
>>> _re4="(%s)"%_re3
>>> import re
>>> print [re.match(_re, "+a") and 'match' for _re in [_re1, _re2,
_re3, _re4]]
['match', None, 'match', None]

this is not the supposed behaivour. all theese patterns should match,
right?



From steven.bethard at gmail.com  Fri Apr 22 19:16:47 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 22 Apr 2005 17:16:47 -0600
Subject: grouping subsequences with BIO tags
In-Reply-To: <mailman.2319.1114210929.1799.python-list@python.org>
References: <wPidnSMBAONhgfXfRVn-sw@comcast.com>	<42686970.196123600@news.oz.net>	<x8CdnR_SuMhL5vTfRVn-pA@comcast.com>
	<mailman.2319.1114210929.1799.python-list@python.org>
Message-ID: <HsmdnWjxzctGGPTfRVn-jg@comcast.com>

Michael Spencer wrote:
> Steven Bethard wrote:
> 
>> Bengt Richter wrote:
>>
>>> On Thu, 21 Apr 2005 15:37:03 -0600, Steven Bethard 
>>> <steven.bethard at gmail.com> wrote:
>>>
>>>> I have a list of strings that looks something like:
>>>>    ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
> 
> [snip]
> 
>>> With error checks on predecessor relationship,
>>> I think I'd do the whole thing in a generator,
> 
> I'm curious why you (Bengt or Steve) think the generator is an advantage 
> here. As Steve stated, the data already exists in lists of strings.
> 
> The direct list-building solution I posted is simpler, and quite a bit 
> faster.

Aren't they basically just the same solution, with your stack.append 
replaced by a yield (and with a little additional error checking)?  As 
far as I'm concerned, either solution is great and writes the code that 
I couldn't. ;)

If you're still interested, in the real problem, the data doesn't exist 
as a list of strings; it exists as a list of objects for which there is 
a Python wrapper to a C API that retrieves the string.  I don't know 
exactly what happens in the wrapping, but it's possible that I can 
conserve some memory by using the generator function.  But I'd have to 
profile it to know for sure.

STeVe


From steve at holdenweb.com  Thu Apr 21 14:16:07 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 14:16:07 -0400
Subject: python classes/file structure
In-Reply-To: <1114103556.453615.304010@l41g2000cwc.googlegroups.com>
References: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>	<mailman.2229.1114097050.1799.python-list@python.org>	<1114103206.925440.218520@l41g2000cwc.googlegroups.com>
	<1114103556.453615.304010@l41g2000cwc.googlegroups.com>
Message-ID: <d48qcn$kq0$2@sea.gmane.org>

codecraig wrote:
> also is it common to have one class per file?
> 
> seems weird to have, MyCustomWidget.MyCustomWidget
> 
> thanks
> 
Well, this *is* fairly normal, but you can manage the namespace to your 
advantage if you wish. So, for example, gui/__init__.py could do

     from CustomWidget import CustomWidget

and then

     from gui import *

sees CustomWidget.CustomWidget simply as CustomWidget.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From peter at engcorp.com  Thu Apr 28 20:53:14 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 28 Apr 2005 20:53:14 -0400
Subject: How do I parse this ? regexp ? [slighly OT]
In-Reply-To: <mailman.1.1114733852.14961.python-list@python.org>
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>	<pan.2005.04.27.17.49.30.308584@jerf.org>
	<mailman.1.1114733852.14961.python-list@python.org>
Message-ID: <tNednb0m1NXEGOzfRVn-gw@powergate.ca>

Simon Dahlbacka wrote:
>>>>>safetyChecker = re.compile(r"^[-\[\]0-9,. ]*$")
> 
> ..doesn't the dot (.) in your character class mean that you are allowing
> EVERYTHING (except newline?)

The re docs clearly say this is not the case:

'''
[]
     Used to indicate a set of characters. Characters can be listed 
individually, or a range of characters can be indicated by giving two 
characters and separating them by a "-". Special characters are not 
active inside sets.
'''

Note the last sentence in the above quotation...

-Peter


From mwm at mired.org  Tue Apr 26 06:09:42 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 05:09:42 -0500
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
	<d4jec2$20g$1@sea.gmane.org>
	<mailman.2485.1114456610.1799.python-list@python.org>
	<1114477978.067147.293900@z14g2000cwz.googlegroups.com>
	<3d6c7jF6oidokU1@individual.net>
Message-ID: <86ekcxn921.fsf@guru.mired.org>

"Claudio Grondi" <claudio.grondi at freenet.de> writes:

> From my point of view both, the existing and
> the proposed documentation assume some
> knowledge about regular expressions as
> such, so doesn't really explain, beeing
> limited to showing the syntax of usage.

It's not clear that this belongs in the Python documentation. The
smtplib documentation doesn't explain what an smtp server is, and why
you'd want to contact one. It just tells you how to go about doing
those things - in other words, the syntax of usage.

Possibly a link to a number of resources like <URL:
http://dmoz.org/Computers/Programming/Languages/Regular_Expressions/ >
should be added to the documentation?

> In other words, I am missing the "Pythonic
> approach" here.

I don't think there's an agreed-upon "Pythonic approach" to regular
expressions. Some people swear by them. Other swear at them.

             <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From dcrespo at gmail.com  Fri Apr 22 13:33:13 2005
From: dcrespo at gmail.com (dcrespo)
Date: 22 Apr 2005 10:33:13 -0700
Subject: PDF Printing support from Python
Message-ID: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>

Hi all... Is there a way to print a PDF file directly from Python
without having Acrobat installed? I know about ReportLab. It's a python
module that lets you create almost any PDF document, but I still don't
know if it supports printing, so I'm looking for a Python module that
could do it. I want to print a PDF file just like if I were doing it
from Acrobat.

Daniel.



From s-mar at nospam.nospam  Fri Apr  8 12:35:12 2005
From: s-mar at nospam.nospam (Scott M.)
Date: Fri, 8 Apr 2005 12:35:12 -0400
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
	=?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8?=
References: <1112974428.387180.103030@f14g2000cwb.googlegroups.com>
Message-ID: <#oTEGlFPFHA.2704@TK2MSFTNGP15.phx.gbl>

>From your site:

"The reason some people don't know for sure if they are going to Heaven when 
they die is because they just don't know."

Isn't that like saying the reason I'm not a rocket scientist is because I'm 
not a rocket scientist?


<RonGrossi_38131 at yahoo.com> wrote in message 
news:1112974428.387180.103030 at f14g2000cwb.googlegroups.com...
>
> http://www.print-it-011.blogspot.com << The Greatest News Ever !
> 




From rbt at athop1.ath.vt.edu  Tue Apr 26 09:36:35 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 26 Apr 2005 09:36:35 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <1114511471.754141.137680@z14g2000cwz.googlegroups.com>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
	<mailman.2463.1114440684.1799.python-list@python.org>
	<1114511471.754141.137680@z14g2000cwz.googlegroups.com>
Message-ID: <426E43E3.907@athop1.ath.vt.edu>

davidb at mcs.st-and.ac.uk wrote:
> Robin Becker wrote:
> 
>>rbt wrote:
>>......
>>
>>>I just want to read PDF files in a portable way (windows, linux,
> 
> mac)
> 
>>>from within Python.
>>>
>>
>>......
>>
>>I suppose you mean extract PDF pages and do something with them.
>>http://www.reportlab.com does have a tool that handles that in
>>Python.
>>It's not free though.
> 
> 
> I imagine that you pay for a reasonable level of support.
> 
> 
>>There are indeed a number of perl modules which do that and other
>>modules which allow you to overprint etc etc.
>>
>>You can always hand translate one of the extract perl modules. They
>>don't seem that hard. Alternatively put a good case to
>>andy at reportlab.com.
> 
> 
> Before embarking on that route, it might be worth looking at this page:
> 
>   http://phaseit.net/claird/comp.text.pdf/PDF_converters.html
> 
> There's a link to a (surprisingly recent) snapshot of my own package,
> that can be used to read some PDF files, and another highly
> recommended module. In the interests of balance, if not completeness,
> I should also mention PDF Playground which has better support for
> reading and writing PDF files:
> 
>   http://sourceforge.net/projects/pdfplayground/
> 
> Maybe this should also be listed on the above resources page. Cameron?
> Are you reading this? ;-)
> 
> David
> 

Thanks David. I'll see what these tools can do for me. Wouldn't you 
agree that it would be in Python's interest to have a standard way in 
which it handles (reads, writes, etc) PDF files on multiple platforms? 
It'd would *really* help me... I hate using Barbaric Perl scripts just 
to deal with PDF files, but if I must, I must.


From bill.mill at gmail.com  Thu Apr  7 13:59:41 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Thu, 7 Apr 2005 13:59:41 -0400
Subject: sorting a list and counting interchanges
In-Reply-To: <1112895889.525655.128540@o13g2000cwo.googlegroups.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mailman.1479.1112871689.1799.python-list@python.org>
	<7xvf6yzflz.fsf@ruckus.brouhaha.com>
	<1112895889.525655.128540@o13g2000cwo.googlegroups.com>
Message-ID: <797fe3d4050407105965e07fef@mail.gmail.com>

On 7 Apr 2005 10:44:49 -0700, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:
> Tim's solution is very nice, it comes from basic things often taught in
> good computer science courses.

I dunno, that comes from my Abstract Algebra course a heck of a lot
more than it came from any of my CS classes (I graduated last May)

While I'm at it though, I want to thank Tim for that post. It was one
of those posts where afterwards you say "of course!" but beforehand I
was totally thinking of it the wrong way. Brought me right back to
Abstract.

Peace
Bill Mill
bill.mill at gmail.com

> 
> In Python when you have to do many (-1)**n you can do:
> (1-2*(n%2))
> This seems quite faster.
> 
> Bearophile
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From vze4rx4y at verizon.net  Sun Apr  3 08:10:34 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sun, 03 Apr 2005 12:10:34 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com>
Message-ID: <_2R3e.3341$7b.3033@trndny06>

[Peter Otten]
> Do you see any chance that list comprehensions will be redefined as an
> alternative spelling for list(<generator expression>)?

Not likely.  It is possible that the latter spelling would make it possible for
Py3.0. eliminate list comps entirely.  However, they are very popular and
practical, so my bet is that they will live on.

The more likely change is that in Py3.0 list comps will no longer expose the
loop variable outside the loop.


Raymond Hettinger





From richie at entrian.com  Tue Apr 26 04:54:23 2005
From: richie at entrian.com (Richie Hindle)
Date: Tue, 26 Apr 2005 09:54:23 +0100
Subject: Python documentation moronicities (continued)
In-Reply-To: <1114454884.549187.122440@o13g2000cwo.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
Message-ID: <j0vr61dgok60f13cdgpamomerj7ickr7fh@4ax.com>


[Xah]
> I have produced my doc.
> ( http://xahlee.org/perl-python/python_re-write/lib/module-re.html )
> 
> isn't there a hundred dollars due to me?

I don't have the time to write a full review of your version, but for the
record I've compared it with the original and I don't think it's a
significant improvement (apart from the title - "String Pattern Matching"
is a better title than "Regular expression operations").  (And no, I'm not
sure I could do any better, but that's not the question.)

[Xah]
> it is published and announced here on April 18th.

[Steve]
> I'll have to take your word for that.

Xah is right - I have a copy here of his message of 18th April, saying "i
have rewrote the Python's re module documentation.".

-- 
Richie Hindle
richie at entrian.com



From sizer at nospam.com  Mon Apr 18 16:49:02 2005
From: sizer at nospam.com (Sizer)
Date: 18 Apr 2005 15:49:02 -0500
Subject: Apache mod_python
References: <np866115k5mee8odb7msitsr03npskcqjf@4ax.com>
Message-ID: <Xns963C8CAEABA23sizernospamcom@216.40.28.86>

Dan <dan at dontspammecauseidontlikit.com> wrote in 
news:np866115k5mee8odb7msitsr03npskcqjf at 4ax.com:

> My question is, how mature/stable is mod_python?  Is it suitable for a
> production environment?  The documentation is a bit lacking, and I've

I use mod_python for all my web stuff, including several live production 
sites - no problems so far. Admittedly, I don't use anything too 
complicated - usually just the handler and publisher syntax and a little 
bit of authentication. Plus MySQL on the back end.

>From what I've been told, the one gotcha is that you want to make sure that 
different on-server users aren't sharing the same copy of mod_python, since 
they'll have a shared context. Which would only a problem where you're 
running a server open for lots of people to set up their own pages. I own 
all the servers being used so it's not an issue.


From mahs at telcopartners.com  Fri Apr 22 19:01:42 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 22 Apr 2005 16:01:42 -0700
Subject: grouping subsequences with BIO tags
In-Reply-To: <x8CdnR_SuMhL5vTfRVn-pA@comcast.com>
References: <wPidnSMBAONhgfXfRVn-sw@comcast.com>	<42686970.196123600@news.oz.net>
	<x8CdnR_SuMhL5vTfRVn-pA@comcast.com>
Message-ID: <d4bvet$bbo$1@sea.gmane.org>

Steven Bethard wrote:
> Bengt Richter wrote:
> 
>> On Thu, 21 Apr 2005 15:37:03 -0600, Steven Bethard 
>> <steven.bethard at gmail.com> wrote:
>>
>>> I have a list of strings that looks something like:
>>>    ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']

[snip]
>>
>> With error checks on predecessor relationship,
>> I think I'd do the whole thing in a generator,

I'm curious why you (Bengt or Steve) think the generator is an advantage here. 
As Steve stated, the data already exists in lists of strings.

The direct list-building solution I posted is simpler, and quite a bit faster.

L = ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']

def timethem(lst, funcs = (get_runsSB, get_runsMS, get_runsBR)):
     for func in funcs:
         print shell.timefunc(func, lst)

  >>> timethem(L)
  get_runsSB(...)  7877 iterations, 63.48usec per call
  get_runsMS(...)  31081 iterations, 16.09usec per call
  get_runsBR(...)  16114 iterations, 31.03usec per call


Michael



From martin at v.loewis.de  Wed Apr 27 02:02:48 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 27 Apr 2005 08:02:48 +0200
Subject: bytecode non-backcompatibility
In-Reply-To: <d4kh4q$tqf$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org>
Message-ID: <426f2b08$0$18804$9b622d9e@news.freenet.de>

Maurice LING wrote:
> Now I understand that Python bytecodes are only dealing with pure python
> source codes. However, the same question lies, how can it (set of
> bytecodes) be made stable, like Java bytecodes, which are pretty stable?
>  Perhaps a better question will be, what techniques Java VM designers
> use that enables Java class files (and JAR files) to be stable and
> usable across versions that is lacking in Python?

The Java class file format is not any more stable than the Python .pyc
format - I think every major release of the JVM has changed details
in the class file format.

The difference is that the newer JVMs accept old class files, by
means of separate loader code for each class file version that was
ever released (and very possibly also support for class file versions
that were never released).

The same approach would be possible in Python, but nobody has
contributed code to do so. It is unlikely that future Python
versions will provide such compatibility with the current byte
code format, either, unless somebody steps forward and volunteers
to maintain that compatibility.

Maintaining this backwards compatibiltiy is a tedious and boring
task, given the many much easier alternatives, so that volunteers are
unlikely to jump in. Sun manages to provide the compatibility by
paying somebody to actually maintain it.

Regards,
Martin


From radam2 at tampabay.rr.com  Tue Apr  5 21:07:51 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Wed, 06 Apr 2005 01:07:51 GMT
Subject: Docorator Disected
References: <424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
	<mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
	<42506757.1010404@v.loewis.de>
	<e3s051p1dfqag3ph7h5f3292294lelk18p@4ax.com>
	<4251fba7.328610657@news.oz.net>
	<0d9551t2ulpdihk2v1vo2dqi53ltoqoitv@4ax.com>
	<425311eb.399846008@news.oz.net>
Message-ID: <b89651ti9j7s84ugvlcshfiobu83r9kr2l@4ax.com>

On Wed, 06 Apr 2005 00:23:01 GMT, bokr at oz.net (Bengt Richter) wrote:

>I don't know of anything other than the compiler and cpython sources.
>The byte codes are not all the same from version to version, since
>added language features may require new byte code operations, at least
>for efficiency, and (as our postings here show ;-) explaining code
>clearly is as much of a job as writing it. Fortunately, python code
>is pretty readable, and there is a lot of interesting reading in
>
> Python-2.4xxx\Lib\compiler\ and Python-2.4xxx\Lib\compiler\
>
>on your disk if you download the source installation. Lots of
>other goodies as well like demo code etc.

Thanks, I've already downloaded the source as well as CVS, although I
don't have a resent version of VisualC++.  I Tried the Express version
8.0 since it's free, but it fails on the library with link errors.
:-/,  Not that I expected it to work since nothing I could find said
it would.  Probably easier to load up linux. But I don't need a
compiler to read the source.


>
>One of the original examples of decorating was to replace the
>staticmethod and classmethod function calls that had to be done
>after the method defs. So the simplest view goes back to
>
>    @deco
>    def foo(): pass
>
>being the equivalent (except if deco raises and exception) of
>
>    def foo(): pass
>    foo = deco(foo)
>
>The plain name @deco was then allowed to become a simple   xxx.yyy(zzz,...) expression
>returning a callable that would serve like the decorator function a bare name normally
>referred to. And then the mechanism could be cascaded. I suggest looking at the
>code for the simplest cascade of normal decorators. E.g., (putting the example in
>the body of a function makes dis.dis easy ;-)

So the @decorator functionality was a very small incremental change to
the pre compiler. That also explains the nesting behavior of stacked
decorators. A small change with a worth while functionality. :-)

Looks like the @decorator is pseudo function limited to a single
callable as it's body.

(experimenting with a different syntax)

@deco(a):
	def function(x): pass
	function = deco(a)(function)(x)


Stacked, it would be:

@deco1(a):
    @deco2(b):
        def function(x): 
            return x+1
        function = deco2(a)(function)(x)
    function = deco1(b)(function)(x)


Each subsequent stacked _ at _ statement redefines "function" when it
exits.

If I have this correct, this would be the equivalent long hand of two
stacked _ at _ expressions.


Cheers,
Ron



From ladasky at my-deja.com  Mon Apr  4 11:37:46 2005
From: ladasky at my-deja.com (ladasky at my-deja.com)
Date: 4 Apr 2005 08:37:46 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
Message-ID: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>

Hi, folks,

First, the obligatory cheerleading -- then, my questions...

I love Python!  I am only an occasional programmer.  Still, the logic
of the language is clear enough that I can retain pretty much all that
I have learned from one infrequent programming session to the next.
That's quite an accomplishment for a language this powerful.  Also, I'm
finally beginning to grasp OOP.  I could never quite get the hang of it
in C++ or Java.  Recently, I discovered __getitem__ and pickle.  Oh,
yeah.

Anyway, my present problem is that I want to make copies of instances
of my own custom classes.  I'm having a little trouble understanding
the process.  Not that I think that it matters -- but in case it does,
I'll tell you that I'm running Python 2.3.4 on a Win32 machine.

I started naively, thinking that I could just call copy.deepcopy() and
be done with it.  After getting a TypeError from the interpreter, I
read the deepcopy docs and discovered that I need to implement a
__deepcopy__ method in my class.  But the docs are a bit vague here.
What exactly should this __deepcopy__ do?  I tried looking for examples
of __deepcopy__ code on the Net, but I'm not quite understanding what
I'm finding there.  I guess that I'm getting deeper into the guts of
Python than I planned.

AFAIK, I'm supposed to add a "def __deepcopy__(self, memo):" to my
class definition.  This will get called when I invoke
copy.deepcopy(myObject).  The object to be copied is self, I presume.
What exactly is memo?  The docs say that it's a dictionary which "keeps
track of what has already been copied."  Somewhere I remember reading
that the namespace of an object is a dictionary.  So is memo identical
to the dictionary of the new object that I'm trying to create?  What
exactly do I add to memo?  I think that I should make shallow copies of
methods, but deep copies of data structures (the contents of which I'm
likely to change).  Do I iterate through and copy the items in
dir(self)?  Do I update memo manually, or does passing memo into copy()
or deepcopy() automatically update memo's contents?  Are there any
items that I *shouldn't* copy from self to memo?  Should __deepcopy__
return memo?

Sorry for all the confusion -- and thanks for your help!

--
Rainforest laid low.
"Wake up and smell the ozone,"
Says man with chainsaw.
John J. Ladasky Jr., Ph.D.



From steve at holdenweb.com  Wed Apr 20 14:27:57 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 20 Apr 2005 14:27:57 -0400
Subject: Troll? was: Re: goto statement
In-Reply-To: <d460o7$g7j$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>	<d45to7$g02$1@news.tsystems.kiev.ua>	<mailman.2184.1114013215.1799.python-list@python.org>
	<d460o7$g7j$1@news.tsystems.kiev.ua>
Message-ID: <d466na$nf6$1@sea.gmane.org>

Maxim Kasimov wrote:
> Andr? Roberge wrote:
> 
>> Maxim Kasimov wrote:
>>
>>>
>>> by the way, "goto" statement will be useful for writing more powerful 
>>> obfuscators
>>>
>> Let me get that clear: you want a goto to help with debugging.
>>
>> And you want to obfuscate your code even more?
>>
>> !?
>>
>> Perhaps you need to write in Perl, or some other similar language.
>>
>> Writing in Python is for those that seek clarity (not obfuscation) and 
>> less bugs.   Which is why a goto statement should definitely never be 
>> part of Python!
>>
>> Andr?
>>
> 
> so insulting to me - you asking i'm a troll, only becose i'm saing that 
> goto maybe sometimes usefull.
> 
Seemed like a fair response to me, given that computer scientists and 
programming practitioners concluded years ago that the potential of goto 
constructs was largely negative, and that they should be eschewed under 
most normal circumstances.

This has now been carried to the extent that there are may other 
languages besides Python that don't include a GOTO.

Do you know something we (and they) don't? If not then this is just an 
idle conversation, since you don't appear to perceive the negative 
aspects at all.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From pgmoscatt at optushome.com.au  Thu Apr 14 08:05:20 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Thu, 14 Apr 2005 22:05:20 +1000
Subject: Tk Listbox - Selected Item ?
Message-ID: <pan.2005.04.14.12.05.18.839662@optushome.com.au>

I am having trouble understanding the methods for the Listbox from Tk.

If I was to select at item in the list using a mouse click (have already
created the bind event) - what method returns the text of the selected
item ?

Pete



From rune.strand at gmail.com  Wed Apr 27 19:26:12 2005
From: rune.strand at gmail.com (runes)
Date: 27 Apr 2005 16:26:12 -0700
Subject: Which IDE is recommended?
In-Reply-To: <mailman.2581.1114614624.1799.python-list@python.org>
References: <426f90ac$1_2@rain.i-cable.com>
	<mailman.2581.1114614624.1799.python-list@python.org>
Message-ID: <1114644372.279641.197200@g14g2000cwa.googlegroups.com>

I used Boa for a Win32 project. It helped me enormously. It's very easy
to design windows etc. But the generated python code is not beautiful.



From erictexier at sbcglobal.net  Mon Apr 25 22:26:06 2005
From: erictexier at sbcglobal.net (Eric Texier)
Date: Tue, 26 Apr 2005 02:26:06 GMT
Subject: python on mac keystroke
Message-ID: <2Fhbe.1394$zu.7@newssvr13.news.prodigy.com>

I am testing python on a mac. In the python console, none of the
control as the arrow to scroll back to a preview line are
working. How can I fix this.
Thanks
eric

Following is an example:
>  python
> Python 2.4.1 (#1, Apr 22 2005, 21:15:26) 
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import sys
>>>> ^[[A
>   File "<stdin>", line 1
>     ^
> SyntaxError: invalid syntax
>>>> import os <<^?^?


From pgmoscatt at optushome.com.au  Wed Apr 13 05:50:33 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Wed, 13 Apr 2005 19:50:33 +1000
Subject: A command in a String ?
References: <pan.2005.04.13.08.25.53.59804@optushome.com.au>
	<mailman.1820.1113381375.1799.python-list@python.org>
	<pan.2005.04.13.08.52.50.894039@optushome.com.au>
	<mailman.1822.1113383415.1799.python-list@python.org>
Message-ID: <pan.2005.04.13.09.50.32.276916@optushome.com.au>

</F>,

No, I hadn't included the '*'   Ya learn something every day.

Pete


On Wed, 13 Apr 2005 11:07:13 +0200, Fredrik Lundh wrote:

> Peter Moscatt wrote:
> 
>>>     strings = "string1", "string2", "string3"
>>>     fm = OptionMenu(root, xx, *strings)
>>
>> Thanks for the help on this.  Yea the 'exec' did the trick.
>> The second example just placed all the strings in one option button.
> 
> did you include the asterisk?  if you remove that, you get one option.  if you
> include it, you get three options.
> 
> </F>



From phil at riverbankcomputing.co.uk  Tue Apr  5 09:06:28 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 5 Apr 2005 14:06:28 +0100 (BST)
Subject: Eric3 under WinXP
In-Reply-To: <01s4519rja95bv769poj5c6ohi34vlvtpj@4ax.com>
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
	<mailman.1366.1112689020.1799.python-list@python.org>
	<i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>
	<mailman.1370.1112692486.1799.python-list@python.org>
	<8to45154ueb3m8gfb0sj1v3ud24j5jnm7d@4ax.com>
	<mailman.1373.1112697815.1799.python-list@python.org>
	<01s4519rja95bv769poj5c6ohi34vlvtpj@4ax.com>
Message-ID: <13094.82.68.80.137.1112706388.squirrel@river-bank.demon.co.uk>

> On Tue, 5 Apr 2005 11:43:38 +0100 (BST), "Phil Thompson"
> <phil at riverbankcomputing.co.uk> wrote:
>
>>>[...]
>>> Or doesn't it fit with "Qt 3.3.4 Evaluation"
>>>
>>> Any hints?
>>
>>What version of Python do you have installed? The binary is built against
>>v2.4.
>>
> Oh sorry, I think, there was a mix between Python2.3 and Python2.4
> somewhere in the registry.
> (it took the .pyd files from Python23 directory).
> I don't understand exactly (replaced some Python23 with
> Python24 with regedit), and, cool, it is working
> (also with eric (before I had installed 3.5.1 (there
> was an error), and now with eric 3.6.2), all is fine.
>
> thank you very much
>
>
>>BTW, your email address is bouncing messages.
>>
>
> Hm, sorry, I don't understand, what you mean.

Email to your address bounces with "mailbox full" errors.

Phil



From acm at muc.de  Sun Apr 10 10:09:30 2005
From: acm at muc.de (Alan Mackenzie)
Date: Sun, 10 Apr 2005 14:09:30 +0000
Subject: EOL created by .write or .encode
References: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>
	<1113034010.742291.94360@o13g2000cwo.googlegroups.com>
Message-ID: <q2cb3d.c71.ln@acm.acm>

In comp.emacs.xemacs Xah Lee <xah at xahlee.org> wrote:
> I found the problem now. (after some  one hour debug time) Python
> didn't have problem. Emacs does.

> If you open a file in emacs, it will open fine regardless whether the
> EOL is ascii 10 or 13. (unix or mac) This is a nice feature. However,
> the what-cursor-position which is used to show cursor position and the
> char's ascii code, says the EOL is ascii 10 when it is in fact ascii
> 13.

The problem is that there are many ways (at least 3) of indicating where
one line of text ends and the next one begins.  Emacs deals with this
problem by converting the file loaded from disk to an internal format,
and converting back again when the time comes to save it again.  The
alternatives would have been worse: noting the line-end convention of
each file, and complicating many routines (and we're talking about more
than "at least 3") to take account of that.

The internal representation of an EOL is 0x0a.  Now that you know this,
it shouldn't bother you again.  Alternatively, you could write a patch
for `what-cursor-position' to fix the problem (if such it be) and submit
it to the mailing list (xemacs-beta at xemacs.org, or something like that).
However, it might introduce more problems than it would solve.  I suspect
the developers would reject it.

> Fuck the irresponsible fuckhead who is responsible for this.

You having a bad day, or something?  ;-)  The fuckhead was probably RMS
(Richard Stallman, he of the Free Software Foundation), and he's been
fucked so many times that once more wouldn't achieve anything at all.
;-)

-- 
Alan Mackenzie (Munich, Germany)
Email: aacm at muuc.dee; to decode, wherever there is a repeated letter
(like "aa"), remove half of them (leaving, say, "a").



From scott at leerssen.com  Wed Apr 13 12:29:35 2005
From: scott at leerssen.com (Scott Leerssen)
Date: Wed, 13 Apr 2005 12:29:35 -0400
Subject: unstatisfied symbols building Python 2.4.1 on HP-UX 10.20
Message-ID: <67be134efec4da3b1179f828945052a9@leerssen.com>

I'm trying to build Python 2.4.1 on HP-UX 10.20 and get the following 
during linking:

/usr/ccs/bin/ld: Unsatisfied symbols:
    PyThread_acquire_lock (code)
    PyThread_exit_thread (code)
    PyThread_allocate_lock (code)
    PyThread_free_lock (code)
    PyThread_start_new_thread (code)
    PyThread_release_lock (code)
    PyThread_get_thread_ident (code)
    PyThread__init_thread (code)


I tried adding the -D_REENTRANT flag to OPTS as suggested in the 
README, but that didn't seem to help/harm.  I searched the python lists 
and found lots of folks commiserating on HP-UX building, but no 
solutions other than building with '--without-threads', which simply 
isn't an option for me.  Any hints?

Thanks,
Scott



From ptmcg at austin.rr.com  Tue Apr  5 22:39:02 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 5 Apr 2005 19:39:02 -0700
Subject: Best editor?
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <1112755142.335149.218220@g14g2000cwa.googlegroups.com>

SciTE (Scintilla Text Editor) is just right for me too.  Low overhead,
great just as a Notepad alternative, but with good coding support too.

-- Paul



From mnations at gmail.com  Wed Apr 20 12:01:49 2005
From: mnations at gmail.com (Mudcat)
Date: 20 Apr 2005 09:01:49 -0700
Subject: Python Win32 Extensions and Excel 2003. OL 11.0 Supported?
Message-ID: <1114012496.533936.297580@l41g2000cwc.googlegroups.com>

Howdy,

I could have sworn I downloaded a version of python win that supported
object library 11.0 at some point. However I just downloaded versions
204 and 203, and the highest version they have is OL 9.0.

Does anyone know if this is a mistake or if Excel 2003 isn't yet
supported with the extensions?

Thanks,
Marc



From jason.mobarak at gmail.com  Wed Apr 27 16:52:05 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 27 Apr 2005 13:52:05 -0700
Subject: Lexicographical sort for numarray
References: <uOSdnUooRt4OufLfRVn-sg@comcast.com>
Message-ID: <1114635125.849049.309880@l41g2000cwc.googlegroups.com>

import numarray as na
import random

# example array
arr = range(100)
random.shuffle(arr)
arr = na.array(arr)
arr = na.reshape(arr, (10,10))

print arr # not rowsort'ed

arr.flat.sort() # key line

print arr # rowsort'ed



From steven.bethard at gmail.com  Wed Apr  6 10:55:45 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 06 Apr 2005 08:55:45 -0600
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <1112787265.022988.205630@z14g2000cwz.googlegroups.com>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
	<mailman.1305.1112633442.1799.python-list@python.org>
	<1112787265.022988.205630@z14g2000cwz.googlegroups.com>
Message-ID: <bI-dnW06qqTyZc7fRVn-1Q@comcast.com>

ladasky at my-deja.com wrote:
> Michael Spencer wrote:
> 
>>ladasky at my-deja.com wrote:
> 
> [snip]
> 
>>>Anyway, my present problem is that I want to make copies of
> 
> instances
> 
>>>of my own custom classes.  I'm having a little trouble
> 
> understanding
> 
>>>the process.  Not that I think that it matters -- but in case it
> 
> does,
> 
>>>I'll tell you that I'm running Python 2.3.4 on a Win32 machine.
> 
> [snip]
> 
>>If you google for:
>>  python __deepcopy__ cookbook
>>you will find a couple of examples of this method in use, among them:
> 
> 
>>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259179
>>
>> 1  class deque(object):
>> 2
>> 3      def __init__(self, iterable=()):
>> 4          if not hasattr(self, 'data'):
>> 5              self.left = self.right = 0
>> 6              self.data = {}
>> 7          self.extend(iterable)
>>
>>[...snip methods...]
>>
>> 8    def __deepcopy__(self, memo={}):
>> 9        from copy import deepcopy
>>10        result = self.__class__()
>>11        memo[id(self)] = result
>>12        result.__init__(deepcopy(tuple(self), memo))
>>13        return result
>>
> So, entering deepcopy, I encounter the first new concept (for me) on
> line 10.  We obtain the class/type of self.  On line 11 we create a
> dictionary item in memo, [id(self):type(self)].  So now I'm confused as
> to the purpose of memo.  Why should it contain the ID of the *original*
> object?

Note that you obtain *and then call* the class/type of self:

py> i, s = 100, 'string'
py> i.__class__, s.__class__
(<type 'int'>, <type 'str'>)
py> i.__class__(), s.__class__()
(0, '')

So you've created a new object calling the constructor with no 
arguments.  So 'result' is a new instance of the class.

> Things get even stranger for me on line 12.  Working from the inside of
> the parentheses outward, an attempt is made to convert self to a tuple.
>  Shouldn't this generate a TypeError when given a complex, non-iterable
> item like the deque class?  I just tried running one of my programs,
> which assigns the name "x" to one of my custom objects, and when I
> execute tuple(x), a TypeError is what I get.

tuple(x) works on any object that defines __iter__:

py> class C(object):
...     def __iter__(self):
...         yield 1
...         yield 2
...         yield 5
...
py> tuple(C())
(1, 2, 5)

So line 12 is making a tuple of the values in the object, and then 
calling result's __init__ again, this time with (a deepcopied) tuple as 
an argument.  This adds the content to the previously uninitialized object.

HTH,

STeVe


From fredrik at pythonware.com  Tue Apr 12 14:22:19 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 20:22:19 +0200
Subject: Please Hlp with msg: "The C++ part of the StaticText object has
	been deleted"
References: <000001c53f7d$b5d31a60$6400a8c0@grondor>
Message-ID: <d3h70b$3al$1@sea.gmane.org>

"Alex Nordhus" wrote:

(nothing)

mentioning what tool you're using, and when you get the message, might
be a bit more helpful than telling us where you work.

did you try googling for the error message, btw?

    http://tinyurl.com/6w9tj

here's the third message in the first thread returned by google:

    http://mail.python.org/pipermail/python-list/2004-September/242725.html

</F>





From djc at object-craft.com.au  Wed Apr  6 19:07:48 2005
From: djc at object-craft.com.au (Dave Cole)
Date: Thu, 07 Apr 2005 09:07:48 +1000
Subject: Sybase module 0.37 released
Message-ID: <42546BC4.3070501@object-craft.com.au>

WHAT IS IT:

The Sybase module provides a Python interface to the Sybase relational
database system.  It supports all of the Python Database API, version
2.0 with extensions.

NOTES:

The 0.37 release is identical to 0.37pre3 as no problems were reported
with the prerelease.

This release contains a number of small bugfixes and patches received
from users.

I have been unable to find the source of the memory leak reported here:
 
http://www.object-craft.com.au/pipermail/python-sybase/2004-December/000346.html

The test program I wrote follows:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
import sys
import Sybase

db = Sybase.connect(..., auto_commit=True)
db.execute('''
if exists (select name from sysobjects where name = "sp_test_leak")
begin
     drop procedure sp_test_leak
end
''')
db.execute('''
create procedure sp_test_leak
     @arg int
as
     select @arg
''')
for i in range(200):
     for j in range(1000):
         c = db.cursor()
         c.callproc('sp_test_leak', {'@arg': 12345 })
     sys.stdout.write('%3d\r' % i)
     sys.stdout.flush()
sys.stdout.write('\n')
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

If someone is able to modify this and come up with a leaking result I
am interested in working on the fix.

You can build for FreeTDS like this:

      python setup.py build_ext -D HAVE_FREETDS -U WANT_BULKCOPY
      python setup.py install


The module is available here:

 
http://www.object-craft.com.au/projects/sybase/download/sybase-0.37pre3.tar.gz

The module home page is here:

     http://www.object-craft.com.au/projects/sybase/

CHANGES SINCE 0.36:

* Fix FreeTDS compilation and rearrange header includes to remove warnings.

* Cursor state initialisation fix from Skip Montanaro.

* Callback declaration fix on Windows from Vadim Beloborodov.

* Cursor output parameters now work when parameters are passed as a
   sequence.

* Output parameters now work for FreeTDS 0.62.4.

     1> create procedure sp_test_output
     2>     @num int, @result int output
     3> as
     4>     select @result = @num
     5> go

     params = c.callproc('sp_test_output', {'@num': 12345,
                                            '@result': Sybase.OUTPUT(1)})
     print params['@result']

* The CS_STATUS_RESULT result set is now consumed internally in the
   Cursor and does not appear in the result sets consumed by the fetch
   and nextset methods.

   The return value from the stored procedure is available in the
   .return_status member of the Cursor.  It will only contain a
   meaningful value once all of the row result sets have been consumed.

   Note that this does not work with FreeTDS 0.62.4.  The return_status
   seems to always be 0.  Research shows that the problem is probably
   in the CT emulation layer as tsql displays the correct value, but
   sqsh displays 0.

* Output hook patch from Ty Sarna has been applied.

* Applied patch from Andre Sedinin to improve error handling.

* Improved detection of SYBASE_OCS.

-- 
http://www.object-craft.com.au


From kristian.zoerhoff at gmail.com  Tue Apr 26 14:33:58 2005
From: kristian.zoerhoff at gmail.com (Kristian Zoerhoff)
Date: Tue, 26 Apr 2005 13:33:58 -0500
Subject: how to find the drive in python/cygwin?
In-Reply-To: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
Message-ID: <3511dc75050426113375a904e@mail.gmail.com>

On 26 Apr 2005 11:29:26 -0700, Mayer <gmayer at cs.bgu.ac.il> wrote:
> Hello:
> 
> I'm running python under cygwin and need to find the drive letter.
> Cygwin has a way of calling my drives by a name relative to the Cygwin
> directory, so I get things like /home/user rather than
> /cygdrive/g/cygwin/home/usr, etc. How can I find the letter of the
> drive, or in the above example, the letter 'g'?

Generally, drive N gets mapped to /cygdrive/n/ but you could call the
'mount' command and parse the output to see what drive letter got
assigned to a given path. On my system, mount returns:

$ mount
C:\cygwin\usr\X11R6\lib\X11\fonts on /usr/X11R6/lib/X11/fonts type
system (binmode)
C:\cygwin\bin on /usr/bin type system (binmode)
C:\cygwin\lib on /usr/lib type system (binmode)
C:\cygwin on / type system (binmode)
c: on /cygdrive/c type user (binmode,noumount)
d: on /cygdrive/d type user (binmode,noumount)
g: on /cygdrive/g type user (binmode,noumount)
x: on /cygdrive/x type user (binmode,noumount)
z: on /cygdrive/z type user (binmode,noumount)
 
> My program needs to run on an external media that comes with Cygwin on
> it. I have no control over what drive is assigned to that media, but
> for some reason, I do need to know the letter.

Why?

-- 
Kristian

kristian.zoerhoff(AT)gmail.com
zoerhoff(AT)freeshell.org


From max2 at fisso.casa  Sat Apr  2 10:48:21 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 02 Apr 2005 15:48:21 GMT
Subject: instance name
Message-ID: <99z3e.1157607$35.42889387@news4.tin.it>

hi.

is there a way to define a class method which prints the instance name?

e.g.:

 >>> class class_1:
...   def myName(self):
...     ????what should i do here????
...
 >>> instance_1 = class_1()
 >>> instance_1.myName()
'instance_1'
 >>>

bye

macs


From meh1963 at gmail.com  Wed Apr 27 22:11:30 2005
From: meh1963 at gmail.com (Matt Hayden)
Date: 27 Apr 2005 19:11:30 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <1114329202.229148.82550@o13g2000cwo.googlegroups.com>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
Message-ID: <1114654290.690332.155200@f14g2000cwb.googlegroups.com>


Johnny Gentile wrote:
> C'mon. Everyone knows God plays a Martin.

I dunno.  I think God has a honkin' big collection so he won't offend
ANY luthiers when they come to visit.  SOMEONE has to set up his
guitars...

mh



From martin at v.loewis.de  Sun Apr 10 17:25:17 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 10 Apr 2005 23:25:17 +0200
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1647.1113160640.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de>
	<mailman.1647.1113160640.1799.python-list@python.org>
Message-ID: <425999BD.7050308@v.loewis.de>

Fredrik Lundh wrote:
> because we're not willing to go through endless PEP processes,
> generate patches that end up sitting on sourceforge for years, deal
> with shitstorms initiated by developers of "competing" libraries, sign
> over our copyrights to the PSF, loose control over the code base,
> seeing the code being forked into several incompatible versions,
> and so on ?

I can see why you are not willing to do some of these things. But
I can't see why that is for other things. For example, why are you
not willing to license your contribution to the PSF (nobody asks
you to "sign it over")?

As for patches sitting on sourceforge for years: regular contributors
can commit to the CVS without putting a patch on SF first (as you
certainly know), so an alternative to waiting for years is to become
a regular contributor.

As for "losing control" - you seem to have a notion of control that
truly makes it difficult to contribute to Python. In this specific
case, I don't think Python should change, though; it should be
possible to accept changes to your code before asking for
your permission to make that change.

Regards,
Martin


From rdm at rcblue.com  Wed Apr 13 21:56:45 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 18:56:45 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <7x3btui27t.fsf@ruckus.brouhaha.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
Message-ID: <6.2.1.2.2.20050413185224.09c425b0@rcblue.com>

Paul Rubin wrote at 18:20 4/13/2005:
>Dick Moores <rdm at rcblue.com> writes:
> > I need to figure out how to compute pi to base 12, to as many digits
> > as possible. I found this reference,
> > <http://mathworld.wolfram.com/Base.html>, but I really don't
> > understand it well enough. Could someone show me how to do what I need?
>
>Using the GNU "bc" utility:
>
>   $ bc -l
>   bc 1.06
>   Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
>   This is free software with ABSOLUTELY NO WARRANTY.
>   For details type `warranty'.
>   scale = 3000    # number of output places wanted
>   obase = 12      # output base
>   print 4 * a(1)  # pi = 4*arctan(1)

I don't believe GNU "bc" is available for Windows, is it?

Thanks,

Dick Moores
rdm at rcblue.com 



From fonnesbeck at gmail.com  Thu Apr  7 15:48:06 2005
From: fonnesbeck at gmail.com (Chris Fonnesbeck)
Date: Thu, 7 Apr 2005 15:48:06 -0400
Subject: curious problem with large numbers
Message-ID: <723eb693050407124816431b6a@mail.gmail.com>

I have been developing a python module for Markov chain Monte Carlo
estimation, in which I frequently compare variable values with a very
large number, that I arbitrarily define as:

inf = 1e10000

However, on Windows (have tried on Mac, Linux) I get the following behaviour:

>>> inf = 1e10000
>>> inf
1.0

while I would have expected:

1.#INF

Smaller numbers, as expected, yield:

>>> inf = 1e100
>>> inf
1e+100

Obviously, I cannot use the former to compare against large (but not
infinite) numbers, at least not to get the result I expect. Has anyone
seen this behaviour?

Thanks,
Chris


From dominic.fox at gmail.com  Sat Apr 30 17:06:35 2005
From: dominic.fox at gmail.com (Dominic Fox)
Date: Sat, 30 Apr 2005 22:06:35 +0100
Subject: Tripoli: a Python-based triplespace implementation
Message-ID: <f278b21305043014061dcc775b@mail.gmail.com>

I have been working on a Python implementation of a modified Tuple
Space (cf Linda, JavaSpaces) that contains only 3-tuples (triples),
and that has operators for copying and moving graphs of triples as
well as sets matching a given pattern. It's called Tripoli, and the
code for it can be found here:

http://www.codepoetics.com/code/tripoli

More explanation of what it is and what it's meant to do can be found
in these three blog posts:

http://codepoetics.com/poetix/index.php?p=110
http://codepoetics.com/poetix/index.php?p=111
http://codepoetics.com/poetix/index.php?p=113 (this post includes some
sample code, that may clarify intended usage somewhat)

At present, a simple XML-RPC server is used to expose a "manifold" - a
collection of triple spaces - to multiple clients. I will be
supplementing this with something beefier, and more REST-ful, in due
course - probably based on Twisted.

This is code in the very earliest stages of testing and development -
I would very much welcome comments and suggestions from any intrepid
persons who fancy having a play around with it.

Dominic


From sjmachin at lexicon.net  Fri Apr 22 21:02:52 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 23 Apr 2005 11:02:52 +1000
Subject: Python licence again
References: <42694858.1060702@geochemsource.com>
	<mailman.2325.1114215999.1799.python-list@python.org>
Message-ID: <pa7j61tmttfgeb8b388mg836i4tla4dsig@4ax.com>

On Fri, 22 Apr 2005 17:26:19 -0700, Robert Kern <rkern at ucsd.edu>
wrote:


>While you can, sort of, and people have already pointed out the 
>appropriate web page to you, I ask that you *don't* use the PSF License. 
>The PSF License uses proper nouns that you will have to change[1].

and don't forget the pronouns  ... 

Seen in a too-hasty copy-paste-edit of the BSD licence:

IN NO EVENT SHALL <person's name suppressed> OR ITS CONTRIBUTORS BE
LIABLE ...





From steve at holdenweb.com  Tue Apr 12 21:43:02 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 21:43:02 -0400
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <A7B5C22F20EE3C4E95744E2F03F1887F380B22@MAYOR.retzlaff.com>
References: <A7B5C22F20EE3C4E95744E2F03F1887F380B22@MAYOR.retzlaff.com>
Message-ID: <425C7926.6090700@holdenweb.com>

Jimmy Retzlaff wrote:
> Terry Reedy wrote:
> 
>>I guess I don't understand some people's determination to not have users 
>>install fully useable Python on their Windows machines.  Doing so seems no
>>different to me than having to install (or upgrade) Shockwave, or Apple's
>>Quicksomething for Windows (not used so much anymore), or RealPlayer,
[yada yada yada]
>>I left out the most direct analogy of a java system.)
> 
> 
> The Windows application that I develop and distribute relies on Python
> plus 14 other packages (wxPython, pywin32all, ctypes, Numeric, PIL,
> etc.). My customers typically install the application on 20-100 user
> machines within their organization at one time so it's mandatory that I
> make an automated silent installer available. That's a lot easier to do
> with py2exe and a Windows installer than it is to do with Python's MSI
> and 14 other packages. It's also more robust - the installer is much
> simpler and my application is always used with exactly the same Python
> environment that was used for QA.
> 
Given the choice between twelve time twenty-five megabytes of solid, 
reliable Python with no detectable version inconsistencies and a lean, 
mean, sharing, caring 25-program package at fifty megabytes total any 
sensible user would jump at the former. Disk is now below a dollar a 
gigabyte and you are right, people should get over it. Small may be 
beautiful, but for a bunch of related but independent modules, 
maintaining the system can lead to inconvenient version lock-step. The 
monolithically-installed program is a black box that stands alone.

> There are also significant hurdles to clear before software can be put
> on user machines in an organization like this. The reviews with the IT
> groups go much more smoothly since I can state that my installer will
> only write files to one folder of the IT group's choosing, put an icon
> in the Start Menu, and will only touch the registry to register an
> uninstaller. If there were 15 installers being run (even if automated)
> we'd have to review each of those individually and my product would
> almost never be approved.
> 
The refuseniks would probably be justified, too.

> I don't actively hide the fact that I use Python, but my customers are
> rarely interested in my toolbox - they are too focused on their own
> business. Some groups will ask what language I use, and the following
> question will always be something like "If we need it to, can it
> interact with Java?" or C# or ...  that's their only interest in the
> language I use. If they open themselves up by asking then I can't help
> but badger them with the virtues of Python for a while. :)
> 
> 
>>To put it another way, needing a Python interpreter to run .py files
> 
> is no
> 
>>different from, for instance, needing a movie player to run .mpg
> 
> files,
> 
>>and all Windows users are or need to become familiar with that general
>>concept.
> 
> 
> Many of my users don't have a concept of a "file" unless it's something
> they ask their assistant to get from a cabinet. They are typically
> corporate executives for very big companies and if they have a computer
> problem then a team of IT people get paged to fix it immediately. They
> don't "need" to become familiar with anything on a computer - their job
> is managing many billions of dollars worth of business every year. They
> can use almost every feature of my application if they can move the
> mouse and click the left button. That requires training for some of
> them, and I feel honored they'll take the time to learn that much in
> order to use my software.
> 
Now that's an approach that sounds crafted to ensure pride in one's work 
and job satisfaction. It's also correctly mindful of the computer's 
peripheral role in most decision-making and recording processes.
> 
>>Also, I think it a bit 'anti-social' to hide usage of Python.  If all
>>Python Windows programs ran with a normal, communally installed
>> Python,
>>then users would gradually get the idea that having Python installed
>> is 
>>much like having Shockwave and other utility platforms installed, and
> that
>>is is part of a 'fully loaded' Windows system to have a .py player
>>installed.
> 
> 
> I feel the opposite. I've skipped evaluating a number of applications
> because they didn't come with their own dedicated JVM. I've spent way
> too much of my own time trying to use applications with conflicting JVM
> requirements only to give up in the end. It's just a new form of DLL
> hell.
> 
I'm with you. This is a pragmatic engineering approach to operating 
large numbers of systems with minimum hassle.

> As a user, I only want to think about how well an application does what
> I need it to do. The more time I spend dealing with supporting
> technologies, the less time I spend on the intended task.
> 
> 
>>If there is something about the default install of Python on Windows
> that 
>>makes it less desireable or less easy than other platforms, then maybe
>>that can be fixed.
> 
> 
> Something like Flash is quite special purposed and you don't have tons
> of large extension modules that are in common use. You just use the base
> system and it is very tightly controlled by one organization to maintain
> backwards compatibility. And it is primarily used to augment/replace
> HTML pages, so you don't want to download/install the engine each time
> you come across another page with Flash content. Applications are
> different, you acquire them once and use them over and over and the
> runtime environment is much more variable from app to app. You don't
> just have to worry about the backward compatibility of Python itself,
> but of every extension module in common use and all the combinations
> that arise out of that. Again look at the pain of shared JVM use. I
> think Microsoft is on the right track to addressing DLL hell now by
> recommending that DLLs be installed in the application folder, not the
> system folder. That's analogous to using application specific JVMs and
> things like py2exe or cx_freeze for Python.
> 
> 
>>To make installation easier, maybe someone could write a
>>small .exe that could be frozen with scripts or run with installers
> and 
>>that would detect the presence/absence of the needed Python version
>> and 
>>offer an auto download and install if needed.
> 
> 
> My users only get access to "approved" sites (nothing else shows up in
> their DNS). It's hard enough to get my own domain added to the ordained
> list, much less a long list like python.org, sourceforge.net,
> effbot.org, etc.
> 
Yup. Single point of responsibility is usually also appreciated, given 
the finger-pointing that can occur.

> All this isn't just for my clients. I have a number of automated
> processes that I run on my server that are written in Python. When I
> need a new version of some module for one of those processes, I don't
> want to spend the time testing it with each of the others to make sure
> it didn't break anything. So I build single file executables from my
> Python scripts so they are completely self-contained. When I want to
> modify a module, then I can test/correct the impact of any new modules
> at that point since I'll be in the code anyway. Before I started doing
> this, the version of Python and the various extension modules in use on
> my server was a couple of years older than the version on my development
> machine because I almost never upgraded for fear of breaking several
> processes.
> 
Way hay! A sound engineering approach pays off. Who would have thought?

> Hard drive space is cheap and building exes is easy and I like the
> benefits.
> 
> Jimmy
> 
> p.s. - on the original topic of this thread - I also buy development
> tools from Microsoft that ensure I have the right to distribute the
> needed DLLs so it's not a concern in my case.

Jimmy:

Thanks for injecting the voice of experience into this debate. Your use 
cases certainly aren't vaporous.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From steve at holdenweb.com  Wed Apr 13 11:09:01 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 11:09:01 -0400
Subject: database in python ?
In-Reply-To: <200504130853.31989.hancock@anansispaceworks.com>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>	<1113339252.851450.184620@z14g2000cwz.googlegroups.com>	<op.so424whjqfv3if@localhost>
	<200504130853.31989.hancock@anansispaceworks.com>
Message-ID: <d3jcfn$817$1@sea.gmane.org>

Terry Hancock wrote:
[...]
> That's interesting.  Most sources I've read seemed to suggest that postgresql
> is slower than MySQL, at least for modest size tables.  There must, I suppose,
> be some turnover point on the size of the database?  Or are you arguing that
> postgresql is now faster than MySQL in the general case?  Can you suggest
> sources for investigating that formally?
> 
> It's just possible that I should reconsider Postgresql compatibility. I
> would assume that using the Python DB API would make portability
> between the two easier in any case, wouldn't it?
> 
> Cheers,
> Terry
> 
> --
> Terry Hancock ( hancock at anansispaceworks.com )
> Anansi Spaceworks  http://www.anansispaceworks.com
> 

I don't know about the whole picture, but I know form evidence on this 
group that there are PostgreSQL driver modules (the name "psycopg" comes 
to mind, but this may be false memory) that appear to take diabolical 
liberties with DBAPI-2.0, whereas my experience with MySQLdb has been 
that I can interchange the driver with mxODBC (for example) as a drop-in 
replacement (modulo the differing paramstyles :-().

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From polykrombelcentercom  Sat Apr 30 11:37:46 2005
From: polykrombelcentercom (Exeem (at dot))
Date: Sat, 30 Apr 2005 17:37:46 +0200
Subject: [newbie] Embedding Flash OCX object
References: <xeidnY1zZ8VM5e_fRVnyuA@scarlet.biz>
	<WMMce.2066$6z3.1571@newssvr33.news.prodigy.com>
Message-ID: <6ZadnfF---HWO-7fRVnyuw@scarlet.biz>


Kartic,

Thanks for your reply,

I already use the wxPython to embbed my flash animation

###
from wxPython.lib.activexwrapper import MakeActiveXClass

ActiveXWrapper = MakeActiveXClass(flashActiveXLib.ShockwaveFlash, 
eventClass=None, eventObj=self)

Flash = ActiveXWrapper( self, -1, style=wxSUNKEN_BORDER)
####

It work fine and i can control my flash animation from Python without 
problem..

But the Wrapper need the flash.ock to be installed on the user system in 
order to work,
and i would like to make an executable application that include the 
flash.ocx or load it on startup for
users who doesn't have the flash player installed.
I would like also to be able to load a flash animation from memory and not 
to load it from external file.

Don't know if you understand me.. Take a look at 
http://www.flashplayercontrol.com/ .. I'd like such a solution for Python,
don't know if i can use that dll from Python or make a module myself..

Anyway, thank a lot for your interest

Dan


"Kartic" <removethis.kartic.krishnamurthy at gmail.com> a ?crit dans le message 
de news: WMMce.2066$6z3.1571 at newssvr33.news.prodigy.com...
> The Great 'Exeem' uttered these words on 4/29/2005 2:11 PM:
>> Hi All,
>>
>> I'm trying to find a way to embbed the flash.ocx object in a Windows 
>> Python application,
>> I've successfully integrated a flash object with the ocx already 
>> installed on the system using the Activex Wrapper,
>> but i would like to embbed it inside my application in order to 
>> distribute my application without the need for the user to install the 
>> flash player.
>> It would like also to embbed the flash animation inside my application 
>> without loading it .. i mean directly from the memory.
>>
>> I've seen that it was possible in C++ or in Delphi, using the 
>> http://www.flashplayercontrol.com/ .. but don't know how to make it in 
>> Python.
>>
>> Any ideas are welcome
>>
>> Dan.
>
>
> Dan,
>
> wxPython has the capability to embed Flash inside a wxPython panel. It 
> uses Macromedia's Flash ocx that is installed when installing flash player 
> on Windows. And it is pretty nifty; take a look at the demo.
>
> From your message, it is appears you are using win32gui functions but I am 
> unable to tell. So using Win32, I do not know how you can do what you are 
> trying. But yeah, look into wxPython!
>
> Please let me know if you need more assistance.
>
> Thanks,
> -Kartic 




From kahsiang.wong at gmail.com  Mon Apr 25 06:05:28 2005
From: kahsiang.wong at gmail.com (kah)
Date: 25 Apr 2005 03:05:28 -0700
Subject: Changing a line in a text file
In-Reply-To: <mailman.2435.1114423084.1799.python-list@python.org>
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
	<mailman.2435.1114423084.1799.python-list@python.org>
Message-ID: <1114423528.568195.12750@l41g2000cwc.googlegroups.com>

Hi,

the example provided by Vishnu is quite close to what I want but it
still required me to write all the data back to the file.

Is there any way where I can just write a particular line?

Regards,
Kah



From iny+news at iki.fi  Fri Apr 22 11:16:21 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Fri, 22 Apr 2005 18:16:21 +0300
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
Message-ID: <m3oec6c056.fsf@iny.iki.fi>

Roy Smith <roy at panix.com> writes:

> iny+news at iki.fi (Ilpo Nyyss?nen) wrote:
>> Of course it caches those when running. The point is that it needs to
>> recompile every time you have restarted the program. With short lived
>> command line programs this really can be a problem.
>
> Are you speculating that it might be a problem, or saying that you have 
> seen it be a problem in a real-life program?

Well, it depends, I might say yes. I have a calendar app with command
line user interface. There the use is like this: "view, add, view,
edit, view, ..." and those are separate command invocations. In that
case a second in startup speed can be a long time. And I did use the
profiler and it did show the sre compiling to be the slowest thing.

Nowdays I use libxml2-python as the XML parser and so the problem is
not so acute anymore. (That is just harder to get in running for
python compiled from source outside the rpm system and it is not so
easy to use via DOM interface.)

> I just generated a bunch of moderately simple regexes from a dictionary 
> wordlist.  Looks something like:

[...]

> So, my guess is that unless you're compiling 100's of regexes each time you 
> start up, the one-time compilation costs are probably not significant.

Well, as I said, I did get it to be the worst in profiler when using
PyXML/xmlproc.

>> And yes, I have read the source of sre.py and I have made an ugly
>> module that digs the compiled data and pickles it to a file and then
>> in next startup it reads that file and puts the stuff back to the
>> cache.
>
> That's exactly what I would have done if I really needed to improve startup 
> speed.  In fact, I did something like that many moons ago, in a previous 
> life.  See R. Smith, "A finite state machine algorithm for finding 
> restriction sites and other pattern matching applications", CABIOS, Vol 4, 
> no. 4, 1988.  In that case, I had about 1200 patterns I was searching for 
> (and doing it on hardware running about 1% of the speed of my current 
> laptop).

The problem is that it is not so easy to get ALL of the regexps dumped
in that way.

> BTW, why did you have to dig out the compiled data before pickling it?  
> Could you not have just pickled whatever re.compile() returned?

Because it dumps the original regexp and then compiles it when loading.

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From sex_god_69 at yahoo.com.au  Tue Apr 12 23:59:20 2005
From: sex_god_69 at yahoo.com.au (Micheal)
Date: Wed, 13 Apr 2005 13:59:20 +1000
Subject: os.path.walk
Message-ID: <425c9902$1@dnews.tpgi.com.au>

If I have os.path.walk(name, processDirectory, None) and processDirectory
needs three arguments how can I ass them because walk only takes 3?




From stewart.midwinter at gmail.com  Mon Apr  4 16:19:17 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 4 Apr 2005 13:19:17 -0700
Subject: Name of IDLE on Linux
In-Reply-To: <d2o9qt$62a$04$1@news.t-online.com>
References: <mailman.1242.1112466945.1799.python-list@python.org>
	<V7D3e.2366$44.1509@newsread1.news.atl.earthlink.net>
	<8764z4nbv5.fsf@thomas.local>
	<8KI3e.2623$44.1361@newsread1.news.atl.earthlink.net>
	<wGJ3e.22064$C7.197@news-server.bigpond.net.au>
	<d2o9qt$62a$04$1@news.t-online.com>
Message-ID: <1112645957.534594.169770@g14g2000cwa.googlegroups.com>


Peter Otten wrote:
and now typing e. g.
> pym os.path
> in the address bar immediately brings up that module's documentation.
> 
> Peter


Nice one! Thanks.

S



From venkatbo at yahoo.com  Sun Apr  3 16:39:44 2005
From: venkatbo at yahoo.com (Venkat B)
Date: Sun, 3 Apr 2005 13:39:44 -0700
Subject: mini_httpd (ACME Labs) & Python 2.4.1 integration
Message-ID: <1112560609.371539@sj-nntpcache-5>

Hi folks,I have a webserver based on mini_httpd
v1.19(http://www.acme.com/software/mini_httpd/).I'd like to run some
python-based CGI scripts via this webserver on an RH9 system.In theory, with
the right env settings, Ishould be able to launch mini_httpd like so:
mini_httpd -c *.pyand be able to run scripts like so:
http://fqdn/simple.pyUsing info from (python) sys.path, multiple
get_config_var(..)s and sys.executable, Iwas able to build and use the env
settings (CGI_PATH, CGI_LD_LIBRARY_PATH) in the mini_httpd sources.However,
when I tried accessing the simple.pyscript as in the url above, I get an
error(errno of 8 - Exec format error) when thecode attempts to invoke the
execve() function. This same script works ok from a CGIHTTPServer.py based
test webserver.I was wondering if you knew what the right env settings
should be to get the py script working... I tried to google around to no
avail.

Thanks a lot.
Regards,
/venkat




From p.s.nuttall at durham.ac.uk  Thu Apr  7 07:01:49 2005
From: p.s.nuttall at durham.ac.uk (Peter Nuttall)
Date: Thu, 7 Apr 2005 12:01:49 +0100
Subject: sorting a list and counting interchanges
In-Reply-To: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
Message-ID: <20050407110149.GD7268@compsoc.dur.ac.uk>

On Wed, Apr 06, 2005 at 03:30:41PM -0700, RickMuller wrote:
> I have to sort a list, but in addition to the sorting, I need to
> compute a phase factor that is +1 if there is an even number of
> interchanges in the sort, and -1 if there is an odd number of
> interchanges.
>

<snip>

I would just write a quicksort and have a counter in the swap function.
A cunning way to do it would be to multiply the counter by -1 for each
swap. if you want I can write what I had in mind. Wikipedia has a good
article of quicksort.

Pete


From mauriceling at acm.org  Sat Apr 16 21:04:38 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 17 Apr 2005 11:04:38 +1000
Subject: RE Engine error with sub()
References: <d3nhqk$dlo$1@domitilla.aioe.org> <d3qiui$sh1$1@domitilla.aioe.org>
Message-ID: <d3scmp$sk3$1@domitilla.aioe.org>

Solved it. Instead of modifying Replacer class, I've made another class 
which initiates a list of Replacer objects from a list of substitution 
rule files. And then iterates through the list of Replacer objects and 
calls upon their own substitute() method. It seems to work.

Thanks for all your advices.

Cheers
Maurice


Maurice LING wrote:

> Hi all,
> 
> I think I might have a workaround to this problem but have no idea how 
> to work it through. I hope that someone can kindly help me out because I 
> do not quite understand the mechanics of the _make_regex() method in the 
> original codes...
> 
> My idea is, instead of having one UserDict, have a list of UserDicts. So 
>  a large unprocessable replacement rule set is split into multiple 
> smaller files, with each file read into a UserDict and it is made into a 
>  RE matcher. Then iterative matching using a list of REs.
> 
> In short, the current precedure is
> 1 dictionary, 1 RE, 1 RE matcher... to match inputs
> My workaround is to change it to
> list of dictionaries, list of REs, list of RE matcher... iterative 
> matching of inputs.
> 
> Can someone kindly help me out here?
> 
> Thanks in advance.
> 
> Cheers,
> Maurice
> 



From removethis.kartic.krishnamurthy at gmail.com  Thu Apr 28 17:32:37 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 28 Apr 2005 21:32:37 GMT
Subject: why "import wx" doesn't work?
In-Reply-To: <427126ca$1_3@rain.i-cable.com>
References: <427126ca$1_3@rain.i-cable.com>
Message-ID: <VDcce.981$PA3.377@newssvr31.news.prodigy.com>

The Great 'monkey' uttered these words on 4/28/2005 2:09 PM:
> I just learn to make a blank windows frame with python and wxpython. I found
> the statment "import wx" cannot work as the original "from wxPython.wx
> import *". I see in the readme file of wxpython that if I install it as the
> default one, I can use "import wx" instead of the long one. What is wrong?
> The code pasted below:
> 
> import wx   # the default is "from wxPython.wx import *", I change it and it
> just can't work.


Which version of wxPython are you running? What do you mean by "does not 
work"...does the import fail or is your code giving errors?


From kent37 at tds.net  Thu Apr 28 06:50:38 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 28 Apr 2005 06:50:38 -0400
Subject: Problem with sending a variable(python) while using html
In-Reply-To: <426ff886$0$13746$ba624c82@nntp03.dk.telia.net>
References: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
	<mailman.2596.1114630252.1799.python-list@python.org>
	<426ff886$0$13746$ba624c82@nntp03.dk.telia.net>
Message-ID: <4270bb93$1_2@newspeer2.tds.net>

Hansan wrote:
> Hi.
> 
> Sorry forgot to post a "non-working" example
> 
> That could be
> print "<a href=script.py?id=", variable,  "'>", "some text"  <input 
> type=hidden name="eventid" value='''+str(variable_name)+'''>'''</a>"
> 
> I know that it isnt very creative, but I am having a hard time getting html 
> to work together with python.
> 
> When the link "some text" is clicked I want to send both the first variable 
> called variable and the second one(variable_name) to the script (script.py)

As Hal pointed out you need to put both variables into the link. Also, you should be url-encoding 
your values using urllib.quote_plus(); otherwise variable values containing characters like &= will 
cause trouble. So for the link I would use

from ulrlib import quote_plus
link = "<a href='script.py?id=%s&eventid=%s'>" % (quote_plus(str(variable)), 
quote_plus(str(variable_name)))

Then you may need urllib.unquote_plus() on the reading end depending on the server.

Kent


From ben at galbraiths.org  Thu Apr 14 22:25:31 2005
From: ben at galbraiths.org (ben at galbraiths.org)
Date: Fri, 15 Apr 2005 10:25:31 +0800
Subject: Mail Delivery System
Message-ID: <200504150223.j3F2NUqK015707@proxy.fnst.com.cn>

Here are your banks documents.

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From steve at holdenweb.com  Tue Apr 12 03:37:33 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 03:37:33 -0400
Subject: HTTPSConnection script fails, but only on some servers (long)
In-Reply-To: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
References: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
Message-ID: <d3ftlj$r3c$1@sea.gmane.org>

Paul Winkler wrote:
> This is driving me up the wall... any help would be MUCH appreciated.
> I have a module that I've whittled down into a 65-line script in
> an attempt to isolate the cause of the problem.
> 
> (Real domain names have been removed in everything below.)
> 
> SYNOPSIS:
> 
> I have 2 target servers, at https://A.com and https://B.com.
> I have 2 clients, wget and my python script.
> Both clients are sending GET requests with exactly the
> same urls, parameters, and auth info.
> 
> wget works fine with both servers.
> The python script works with server A, but NOT with server B.
> On Server B, it provoked a "Bad Gateway" error from Apache.
> In other words, the problem seems to depend on both the client
> and the server. Joy.
> 
> Logs on server B show malformed URLs ONLY when the client
> is my python script, which suggests the script is broken...
> but logs on server A show no such problem, which suggests
> the problem is elsewhere.
> 
> DETAILS
> 
> Note, the module was originally written for the express
> purpose of working with B.com;  A.com was added as a point of reference
> to convince myself that the script was not totally insane.
> Likewise, wget was tried when I wanted to see if it might be
> a client problem.
> 
> Note the servers are running different software and return different
> headers. wget -S shows this when it (successfully) hits url A:
> 
>  1 HTTP/1.1 200 OK
>  2 Date: Tue, 12 Apr 2005 05:23:54 GMT
>  3 Server: Zope/(unreleased version, python 2.3.3, linux2) ZServer/1.1
>  4 Content-Length: 37471
>  5 Etag:
>  6 Content-Type: text/html;charset=iso-8859-1
>  7 X-Cache: MISS from XXX.com
>  8 Keep-Alive: timeout=15, max=100
>  9 Connection: Keep-Alive
> 
> ... and this when it (successfully) hits url B:
> 
>  1 HTTP/1.1 200 OK
>  2 Date: Tue, 12 Apr 2005 04:51:30 GMT
>  3 Server: Jetty/4.2.9 (Linux/2.4.26-g2-r5-cti i386 java/1.4.2_03)
>  4 Via: 1.0 XXX.com
>  5 Content-Length: 0
>  6 Connection: close
>  7 Content-Type: text/plain
> 
> Only things notable to me, apart from the servers are the "Via:" and
> "Connection:" headers. Also the "Content-Length: 0" from B is odd, but
> that doesn't seem to be a problem when the client is wget.
> 
> Sadly I don't grok HTTP well enough to spot anything really
> suspicious.
> 
> The apache ssl request log on server B is very interesting.
> When my script hits it, the request logged is like:
> 
> A.com - - [01/Apr/2005:17:04:46 -0500] "GET
> https://A.com/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
> HTTP/1.1" 502 351
> 
> ... which apart from the 502, I thought reasonable until I realized
> there's
> not supposed to be a protocol or domain in there at all.  So this is
> clearly
> wrong. When the client is wget, the log shows something more sensible
> like:
> 
> A.com - - [01/Apr/2005:17:11:04 -0500] "GET
> /SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
> HTTP/1.0" 200 -
> 
> ... which looks identical except for not including the spurious
> protocol and domain, and the response looks as expected (200 with size
> 0).
> 
> So, that log appears to be strong evidence that the problem is in my
> client
> script, right?  The failing request is coming in with some bad crap in
> the path, which Jboss can't handle so it barfs and Apache responds with
> 
> Bad Gateway.  Right?
> 
> So why does the same exact client code work when hitting server B??
> No extra gunk in the logs there. AFAICT there is nothing in the script
> that could lead to such an odd request only on server A.
> 
> 
> THE SCRIPT
> 
> #!/usr/bin/python2.3
> 
> from httplib import HTTPSConnection
> from urllib import urlencode
> import re
> import base64
> 
> url_re = re.compile(r'^([a-z]+)://([A-Za-z0-9._-]+)(:[0-9]+)?')
> 
> target_urls = {
>     'B': 'https://B/SkinServlet/zopeskin',
>     'A': 'https://A/zope/manage_main',
> }
> 
> auth_info= {'B':    ('userXXX', 'passXXX'),
>             'A':    ('userXXX', 'passXXX'),
>             }
> 
> def doRequest(target, **kw):
>     """Provide a trivial interface for doing remote calls.
>     Keyword args are passed as query parameters.
>     """
>     url = target_urls[target]
>     user, passwd = auth_info[target]
>     proto,host,port=url_re.match(url).groups()
>     if port:
>         port = int(port[1:])   # remove the ':' ...
>     else:
>         port = 443
>     creds = base64.encodestring("%s:%s" % (user, passwd))
>     headers = {"Authorization": "Basic %s" % creds }
>     params = urlencode(kw).strip()
>     if params:
>         url = '%s?%s' % (url, params)
>     body = None # only needed for POST
>     args =('GET', url, body, headers)
>     print "ARGS: %s" % str(args)
>     conn = HTTPSConnection(host)
>     conn.request(*args)
>     response = conn.getresponse()
>     data = response.read()
>     if response.status >= 300:
>         print
>         msg = '%i ERROR reported by remote system %s\n' %
> (response.status,
>                                                            url)
>         msg += data
>         raise IOError, msg
>     print "OK!"
>     return data
> 
> if __name__ == '__main__':
>     print "attempting to connect..."
>     result1 = doRequest('A', skey='id', rkey='id')
>     result2 = doRequest('B', action='updateSkinId',
>                         skinId='406',  facilityId='1466')
>     print "done!"
> 
> 
> # EOF
> 
> 
> So... what the heck is wrong here?
> 
> at-wits-end-ly y'rs,
> 
> Paul Winkler
> 
Paul:

I don't claim to have analyzed exactly what's going on here, but the 
most significant difference between the two is that you are accessing 
site B using HTTP 1.1 via an HTTP 1.0 proxy (as indicated byt he "Via:" 
header).

Whether this is a clue or a red herring time alone will tell.

It's possible that wget and your client code aren't using the same proxy 
settings, for example.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From gmayer at cs.bgu.ac.il  Tue Apr 26 14:29:26 2005
From: gmayer at cs.bgu.ac.il (Mayer)
Date: 26 Apr 2005 11:29:26 -0700
Subject: how to find the drive in python/cygwin?
Message-ID: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>

Hello:

I'm running python under cygwin and need to find the drive letter.
Cygwin has a way of calling my drives by a name relative to the Cygwin
directory, so I get things like /home/user rather than
/cygdrive/g/cygwin/home/usr, etc. How can I find the letter of the
drive, or in the above example, the letter 'g'?

My program needs to run on an external media that comes with Cygwin on
it. I have no control over what drive is assigned to that media, but
for some reason, I do need to know the letter.

Please help!

Thanks,

Mayer



From kahsiang.wong at gmail.com  Mon Apr 25 05:39:11 2005
From: kahsiang.wong at gmail.com (kah)
Date: 25 Apr 2005 02:39:11 -0700
Subject: Changing a line in a text file
Message-ID: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>

How do I change a line in a file??

For example I have the follwing text in my file:

line1
line2
line3
line4

How do I replace 'line2' with 'newline'. Since the write operation in
python will  overwrite everything.

Regards,
Kah



From m at m.com  Wed Apr 27 09:16:29 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 21:16:29 +0800
Subject: Which IDE is recommended?
Message-ID: <426f90ac$1_2@rain.i-cable.com>

Read through python site for programming tool, really plenty of choices :-)
(For c++, I just can't breath with very very limited choices)

Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
also worth looking. Actually which one are you guys using? and why? I think
it is also valuable for those who are new to python as me.





From s_david_rose at hotmail.com  Fri Apr 29 16:45:25 2005
From: s_david_rose at hotmail.com (GMane Python)
Date: Fri, 29 Apr 2005 16:45:25 -0400
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <d4u61g$in9$1@sea.gmane.org>

As with most things, you have to understand 'why' you want to do something
before you can really understand how it applies.

Ok.  Go to amazon.  They've setup a 'shopping cart'.  That cart is made of
variables, name, cred.card num, items, quantity of items, ship-to address,
state, shipping cost, shipping type, tax (if applicable), etc.  Ok.  If you
have a program and want this info, ok, you could set up variables for all of
them.

What if you now have 2 shopping carts?  How do you double the variables?
What if you now have 1000 shopping carts?  How do you scale your programming
so what works for 1 works for 1000?

OOP allows you to create a 'structure' of the variables, and when someone
enters their name in a field and hits, 'add to cart' , abstractly, you'll
have a structure in your program like:

User = ShoppingCartClass()

Now, you defined User to be an object of ShoppingCartClass.

Now, methods are pre-defined actions.  You might have:
.Checkout()
.DeleteItem()
.AddItem()

and of course inside the parenthesis, you'd have relevent info. for the
routine.

So maybe you'd do:
User = ShoppingCartClass()
User.AddItem(sku=5)
User.DeleteItem(sku=22)
User.CheckOut(State='CT', CredCard='Visa', CredNum='1234-5678-8765-4321')

So, there's the why. This just barely scratches the surface. hope I didn't
confuse you.

-Dave
<demon_slayer2839 at yahoo.com> wrote in message
news:1114709684.096071.109960 at l41g2000cwc.googlegroups.com...
> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>





From sharidas at zeomega.com  Fri Apr  1 03:25:38 2005
From: sharidas at zeomega.com (Satchidanand Haridas)
Date: Fri, 01 Apr 2005 13:55:38 +0530
Subject: dictionary: sorting the values preserving the order
In-Reply-To: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
References: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
Message-ID: <424D0582.4010605@zeomega.com>

Rakesh wrote:

>Hi,
>  For a particular problem of mine, I want to sort <key, value> pairs
>by its value.
>
>Eg:
>
>Input:
>
>A, 4
>B, 5
>C, 1
>D, 2
>E, 3
>
>I would like the output to be:
>
>C
>D
>E
>A
>B
>
>  
>
the following code does that:
 >>> d1 = {'a':4,'b':5,'c':1,'d':2,'e':3}
 >>> i1 = [ (d1[i], i) for i in d1.keys() ]
 >>> i1.sort()
 >>> i1
[(1, 'c'), (2, 'd'), (3, 'e'), (4, 'a'), (5, 'b')]
 >>> for each in i1:
...     print each[1]  
c
d
e
a
b


thanks,
Satchit




>i.e. I would like to get the keys in the sorted order of values.
>
>I did google around a little bit. One solution to a similar problem
>suggested is:
>
># Courtesy:
>http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52306
>def sortedDictValues3(adict):
>    keys = adict.keys()
>    keys.sort()
>    return map(adict.get, keys)
>
>This gets a list sorted by the keys. How would I get a revised
>dictionary 
>sorted by its values.
>
>  
>


From auch-ich-m at g-kein-spam.com  Sat Apr  2 16:20:01 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Sat, 02 Apr 2005 23:20:01 +0200
Subject: testing -- what to do for testing code with behaviour dependant
	upon which files exist?
References: <mailman.1245.1112473860.1799.python-list@python.org>
Message-ID: <15916192.CBGPbGuXk5@news.perlig.de>

* Brian van den Broek wrote:

> The relevant part of the validation method code looks like:
> 
>      # self.universe_files is a list of file paths
>      non_existent_files = [ x for x in self.universe_files if
>                                         not os.path.isfile(x) ]
>      if non_existent_files:
>          raise Files_dont_existError, non_existent_files
> 
> I can test the custom error class just fine, but I don't see how to
> test the validation method itself.

The logic is simple -- you don't want to test os.path.isfile, so mock it.
Just encapsulate the os.path.isfile call in an own method, which can be
overridden by your test.

nd
-- 
# Andr? Malo, <http://pub.perlig.de/> #


From danb_83 at yahoo.com  Sun Apr 24 00:10:47 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 23 Apr 2005 21:10:47 -0700
Subject: Variables
References: <426B0283.40602@cloudthunder.com><d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<ZMydnQbLxdM9jfbfRVn-hg@comcast.com>
	<mailman.2369.1114313380.1799.python-list@python.org>
Message-ID: <1114315847.532982.178620@z14g2000cwz.googlegroups.com>

Richard Blackwood wrote:
> Steven Bethard wrote:
>
> > Richard Blackwood wrote:
> >
> >> Indeed, this language is math. My friend says that foo is a
constant
> >> and necessarily not a variable. If I had written foo =
raw_input(),
> >> he would say that foo is a variable.
> >
> >
> > Then what does he say if you write:
> >
> > foo = 5
> > foo = 6
...
> He says that foo is a constant. At first it was a constant which
equaled
> 5, then it was a constant that equaled 6.

He must have a very unusual definition of "constant".



From prabapython at yahoo.co.in  Wed Apr 27 06:39:03 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Wed, 27 Apr 2005 11:39:03 +0100 (BST)
Subject: Doubt regarding python Compilation
Message-ID: <20050427103903.65602.qmail@web8403.mail.in.yahoo.com>

Dear all,

       I have doubt regarding python Compilation.
I want to know whether Python is compiler language
or interpreted language.  If Python is interpreter
language why compilation is there.


with regards 

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From bokr at oz.net  Sat Apr  2 05:29:12 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 02 Apr 2005 10:29:12 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <ixt3e.1907$7b.368@trndny01>
Message-ID: <424e73a3.100782477@news.oz.net>

On Sat, 02 Apr 2005 09:24:30 GMT, "Raymond Hettinger" <vze4rx4y at verizon.net> wrote:

>[Peter Hansen]
>> If py.test provides a driver utility that does
>> effectively this, well, that's nice for users.  If
>> it doesn't run them as separate processes, it wouldn't
>> suit me anyway.
>>
>> Still, it sounds like it does have a strong following
>> of smart people: enough to make me want to take a
>> closer look at it to see what the fuss is about. :-)
>
>FWIW, py.test scales nicely.  Also, it takes less time to try
>it out or read the docs than discuss it to death on a newsgroup.
>The learning curve is minimal.
>
>
Is there a package that is accessible without svn?

Regards,
Bengt Richter


From mwm at mired.org  Tue Apr 26 03:22:48 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 02:22:48 -0500
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org>
Message-ID: <86wtqqm27r.fsf@guru.mired.org>

Maurice LING <mauriceling at acm.org> writes:

> I find this part of the story a nuisance, C components in 3rd party
> modules... What are the C components compiled into? What are actually
> "so" files?

Shared object files. They're executable code that can be linked into a
program at runtime. Like DLL's on Windows.

> I am using Fink to maintain my Python installation and Fink maintains
> the 3rd party libraries in /sw/lib/python2.3/site-packages. Imagine
> the trouble if I do a "fink selfupdate" and "fink update-all" and
> finds that my Python is replaced by a newer version, say Python
> 2.4. Then all my 3rd party libraries in
> /sw/lib/python2.3/site-packages are un-usable... And I will have to
> re-download and re-install all the libraries again.

Yeah, it's pain. It would be nice if setup.py kept a list of installed
packages that you could extract before updating, so you would know
what needed to be updated.

Last time I updated, I used the systems package handler. I asked it
for the names of all the Python packages that were installed and saved
that to a file. Then I installed the new version of Python. Then I
edited the package list to turn it into a series of package update
commands, and ran that file.

> Now I understand that Python bytecodes are only dealing with pure
> python source codes. However, the same question lies, how can it (set
> of bytecodes) be made stable, like Java bytecodes, which are pretty
> stable? Perhaps a better question will be, what techniques Java VM
> designers use that enables Java class files (and JAR files) to be
> stable and usable across versions that is lacking in Python?

All you have to do is convince the developers to declare the set of
bytecodes fixed, and they'd be stable. I don't think that will be
easy, as it removes one of the methods used to improve the performance
of Python. Since rebuilding the bytecode files is trivial (just invoke
compileall.py in the library as a script), this isn't really a
problem. The only thing that breaks are modules that muck about inside
the bytecode. I don't know how much bytecode improvements have sped
things up, but I do know that if I ever used a module that mucked
around with byte codes, I wasn't aware of it - so this is a tradeoff
I'm more than happy to make.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From sunnan at handgranat.org  Fri Apr  1 22:34:22 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sat, 02 Apr 2005 03:34:22 GMT
Subject: Ternary Operator in Python
In-Reply-To: <mailman.1212.1112398120.1799.python-list@python.org>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com><mailman.1198.1112380413.1799.python-list@python.org>	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
	<mailman.1212.1112398120.1799.python-list@python.org>
Message-ID: <2po3e.21052$d5.156184@newsb.telia.net>

Terry Reedy wrote:
> Gee, what about 0.0 < a < 1.0 < b < 2.0?  I see both as synthesized 
> multinary operators, but your are right in that this combination does act 
> differently than a+b+c.

Is < really multinary in python? It looks binary to me, just like +.

(a+b)+c

(((0.0 < a) < 1.0) < b ) < 2.0
Sunnan


From http  Wed Apr  6 21:39:52 2005
From: http (Paul Rubin)
Date: 06 Apr 2005 18:39:52 -0700
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
	<1112835544.302702.294570@z14g2000cwz.googlegroups.com>
Message-ID: <7xmzsb8ivr.fsf@ruckus.brouhaha.com>

"Jordan Rastrick" <jrastrick at student.usyd.edu.au> writes:
> def mycmp(x,y):
>    global phase
>    c = cmp(x,y)
>    if c > 0: # i.e. a swap will be performed in the sort
>        phase = -phase
>    return c

That doesn't necessarily work.  You don't know that c>0 will always
result in a swap.  You don't know that the sorting algorithm necessarily
never swaps an element with itself.  You have to find all the cycles in
the permutation and count the length of each one.  Is this a homework
problem?  If yes, the above should be enough of a hint.



From removethis.kartic.krishnamurthy at gmail.com  Sat Apr 30 16:28:50 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sat, 30 Apr 2005 20:28:50 GMT
Subject: [newbie] Embedding Flash OCX object
In-Reply-To: <6ZadnfF---HWO-7fRVnyuw@scarlet.biz>
References: <xeidnY1zZ8VM5e_fRVnyuA@scarlet.biz>
	<WMMce.2066$6z3.1571@newssvr33.news.prodigy.com>
	<6ZadnfF---HWO-7fRVnyuw@scarlet.biz>
Message-ID: <6URce.2055$2f2.1166@newssvr19.news.prodigy.com>

The Great 'Exeem' uttered these words on 4/30/2005 11:37 AM:
> Kartic,
> 
> Thanks for your reply,
> 
> I already use the wxPython to embbed my flash animation
> 
> ###
> from wxPython.lib.activexwrapper import MakeActiveXClass
> 
> ActiveXWrapper = MakeActiveXClass(flashActiveXLib.ShockwaveFlash, 
> eventClass=None, eventObj=self)
> 
> Flash = ActiveXWrapper( self, -1, style=wxSUNKEN_BORDER)
> ####
> 
> It work fine and i can control my flash animation from Python without 
> problem..
> 
> But the Wrapper need the flash.ock to be installed on the user system in 
> order to work,
> and i would like to make an executable application that include the 
> flash.ocx or load it on startup for
> users who doesn't have the flash player installed.
> I would like also to be able to load a flash animation from memory and not 
> to load it from external file.
> 
> Don't know if you understand me.. Take a look at 
> http://www.flashplayercontrol.com/ .. I'd like such a solution for Python,
> don't know if i can use that dll from Python or make a module myself..
> 
> Anyway, thank a lot for your interest
> 
> Dan


Dan,

Ah! I see what you are trying to do. While I don't have a working piece 
of code to share with you, I can give you a few ideas that you could 
consider:

1. Supply the Macromedia OCX with your app. Try to use the wxActivex 
class and if that fails, register your copy of the OCX. You can do this 
either using a batch file invoking regsvr32 or use Win32 to register. 
The flip side: The flash will be loaded from a file rather than memory.

2. Wrap the flashplayercontrol.com's DLL in an Activex control using VB 
and distribute your OCX. And then use wxActivex to access your OCX.

3. Use SWIG to generate Python bindings for the DLL. I have never done 
this and I am sure some of the more erudite members of the newsgroup can 
shed some light.

4. Call the supplied DLL using Ctypes. In this case, you can convert the 
example under the "Features" link of that site in DLL calls using 
Ctypes. Question: How will that integrate with wx?

Hope that helped a bit.

Thanks,
-Kartic


From peter at engcorp.com  Thu Apr 21 10:09:59 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 21 Apr 2005 10:09:59 -0400
Subject: Strings
In-Reply-To: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
References: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
Message-ID: <UbqdnXN1cNHbKfrfRVn-rw@powergate.ca>

Dan wrote:
> I've having trouble coming to grip with Python strings.
> 
> I need to send binary data over a socket.  I'm taking the data from a
> database.  When I extract it, non-printable characters come out as a
> backslash followed by a three numeric characters representing the
> numeric value of the data.  I guess this is what you would call a raw
> Python string.  I want to convert those four characters ( in C-think,
> say "\\012" ) into a single character and put it in a new string.

Does this help?

 >>> s = 'foo \\012 bar'
 >>>
 >>> s.decode('string-escape')
'foo \n bar'
 >>> print s.decode('string-escape')
foo
  bar
 >>>

Note that the \n in the first one is because I didn't
*print* the result, but merely allowed the interpreter
to call repr() on it.  repr() for a newline is of course
backslash-n, so that's what you see (inside quotation marks)
but the string itself has only 9 characters in it, as
you wished.

-Peter


From matthew_shomphe at countrywide.com  Fri Apr  8 11:53:33 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 8 Apr 2005 08:53:33 -0700
Subject: text processing problem
In-Reply-To: <d34lm5$pfe$1@domitilla.aioe.org>
References: <d34a7f$gnd$1@domitilla.aioe.org>
	<1112915641.663333.175260@f14g2000cwb.googlegroups.com>
	<d34j31$nu6$1@domitilla.aioe.org>
	<1112922056.365893.307550@f14g2000cwb.googlegroups.com>
	<d34lm5$pfe$1@domitilla.aioe.org>
Message-ID: <1112975613.502560.242010@g14g2000cwa.googlegroups.com>


Maurice LING wrote:
> Matt wrote:
> > I'd HIGHLY suggest purchasing the excellent <a
> > href="http://www.oreilly.com/catalog/regex2/index.html">Mastering
> > Regular Expressions</a> by Jeff Friedl.  Although it's mostly
geared
> > towards Perl, it will answer all your questions about regular
> > expressions.  If you're going to work with regexs, this is a
must-have.
> >
> > That being said, here's what the new regular expression should be
with
> > a bit of instruction (in the spirit of teaching someone to fish
after
> > giving them a fish ;-)   )
> >
> > my_expr = re.compile(r'(\w+)\s*(\(\1\))')
> >
> > Note the "\s*", in place of the single space " ".  The "\s" means
"any
> > whitespace character (equivalent to [ \t\n\r\f\v]).  The "*"
following
> > it means "0 or more occurances".  So this will now match:
> >
> > "there  (there)"
> > "there (there)"
> > "there(there)"
> > "there                                          (there)"
> > "there\t(there)" (tab)
> > "there\t\t\t\t\t\t\t\t\t\t\t\t(there)"
> > etc.
> >
> > Hope that's helpful.  Pick up the book!
> >
> > M@
> >
>
> Thanks again. I've read a number of tutorials on regular expressions
but
> it's something that I hardly used in the past, so gone far too rusty.
>
> Before my post, I've tried
> my_expr = re.compile(r'(\w+) \s* (\(\1\))') instead but it doesn't
work,
> so I'm a bit stumped......
>
> Thanks again,
> Maurice

Maurice,
The reason your regex failed is because you have spaces around the
"\s*".  This translates to "one space, followed by zero or more
whitespace elements, followed by one space".  So your regex would only
match the two text elements separated by at least 2 spaces.

This kind of demostrates why regular expressions can drive you nuts.

I still suggests picking up the book; not because Jeff Friedl drove a
dump truck full of money up to my door, but because it specifically has
a use case like yours.  So you get to learn & solve your problem at the
same time!

HTH,
M@



From mauriceling at acm.org  Sun Apr  3 09:38:21 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 03 Apr 2005 23:38:21 +1000
Subject: text analysis in python
In-Reply-To: <1325i2-sd2.ln1@lairds.us>
References: <mailman.1255.1112523725.1799.python-list@python.org>
	<1325i2-sd2.ln1@lairds.us>
Message-ID: <424FF1CD.2040102@acm.org>

		.
> I don't know if you're aware that, in a fairly strong sense,
> anything "[i]n the Java world" *is* "for Python".  If you
> program with Jython (for example--there are other ways to
> achieve much the same end), your source code can be in
> Python, but you have full access to any library coded in Java.

Yes, I do know the presence of Jython but had not used it in any 
productive ways. So I might need some assistance here... Say I code my 
stuffs in Jython (importing java libraries) in a file "text.py"... Will 
there be any issues when I try to import text.py into CPython?

My impression is that NLTK is more of a teaching tool rather than for 
production use. Please correct me if I'm wrong... The main reason I'm 
looking at NLTK is that it is pure python and is about the comprehensive 
text analysis toolkit in python. Are there any projects that uses NLTK?

Thanks and Cheers
Maurice


From dmbkiwi at gmail.com  Tue Apr 26 22:16:25 2005
From: dmbkiwi at gmail.com (dmbkiwi at gmail.com)
Date: 26 Apr 2005 19:16:25 -0700
Subject: kdialog and unicode
In-Reply-To: <8aft611878hr6d3an0n55rbk23mm71hpht@4ax.com>
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
	<8d7dabda.0504261239.37952804@posting.google.com>
	<8aft611878hr6d3an0n55rbk23mm71hpht@4ax.com>
Message-ID: <1114568185.015176.238000@g14g2000cwa.googlegroups.com>


John Machin wrote:
> On 26 Apr 2005 13:39:26 -0700, dmbkiwi at gmail.com (dumbkiwi) wrote:
>
> >Peter Otten <__peter__ at web.de> wrote in message
news:<d4l92e$9di$05$1 at news.t-online.com>...
> >> Dumbkiwi wrote:
> >>
> >> >> Just encode the data in the target encoding before passing it
to
> >> >> os.popen():
>
> >
> >Anyway, from your post, I've done some more digging, and found the
> >command:
> >
> >sys.setappdefaultencoding()
> >
> >which I've used, and it's fixed the problem (I think).
> >
>
> Dumb Kiwi, eh? Maybe not so dumb -- where'd you find
> sys.setappdefaultencoding()? I'm just a dumb Aussie [1]; I looked in
> the 2.4.1 docs and also did import sys; dir(sys) and I can't spot it.

Hmmm. See post above, seems to be something generated by eric3.  So
this may not be the fix I'm looking for.

>
> In any case, how could the magical sys.setappdefaultencoding() fix
> your problem? From your description, your problem appeared to be that
> you didn't know what encoding to use.

I knew what encoding to use, the problem was that the text was being
passed to kdialog as ascii.  The .encode('utf-8') at least allows
kdialog to run, but the text still looks like crap.  Using
sys.setappdefaultencoding() seemed to help.  The text looked a bit
better - although not entirely perfect - but I think that's because the
font I was using didn't have the correct characters (they came up as
square boxes).
>
> What is the essential difference between
>
>    send(u_data.encode('polish'))
>
> and
>
>    sys.setappdefaultencoding('polish')
>    ...
>    send(u_data)

Not sure - I'm new to character encoding, and most of this seems like
black magic to me.

>
> [1]: Now that's *TWO* contenders for TautologyOTW :-)
> 
> Cheers,
> 
> John

Matt



From vincent at visualtrans.de  Sat Apr  2 11:40:57 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Sat, 2 Apr 2005 18:40:57 +0200
Subject: Performance issue
References: <mailman.1239.1112456748.1799.python-list@python.org>
Message-ID: <d2mhuo$ae5$1@news5.zwoll1.ov.home.nl>

"Tom Carrick" <knyght at gmail.com> schrieb im Newsbeitrag 
news:mailman.1239.1112456748.1799.python-list at python.org...
| Hi,
|
| In my attempted learning of python, I've decided to recode an old
| anagram solving program I made in C++. The C++ version runs in less
| than a second, while the python takes 30 seconds. I'm not willing to
| think it's just python being slow, so I was hoping someone could find
| a faster way of doing this. Also, I was wondering if there was a more
| builtin, or just nicer way of converting a string to a list (or using
| the sort function on a list) than making a function for it.
|
| The words.txt here is just a copy of FreeBSD's /usr/share/dict/words
|
| Anyway, the code:
|
| import string

You're importing string, but never use it, so you can omit that line.

|
| # Need a function to convert a string to a list to be
| # able to use the sort() function
| def string2list(s):
|    l = []
|    for i in range(0, len(s)):
|        l.append(s[i])
|    return l

No need to write your own function. list(s) already does the trick.

|
| words = []
| found = []
|
| anagram = raw_input("Find anagrams of word: ")
|
| f = open('words.txt', 'r')
| file = f.read()
| f.close()


I don't have a copy of words.txt, but here's what I would try
(untested):

anagram = raw_input("Find anagrams of word: ")
sorted_anagram = list(sorted(anagram.lower()))
# If you're Python is pre 2.4 ise
# sorted_anagram = list(anagram.lower())
# sorted_anagram.sort() #--sort list in place


found = []
# assuming "words.txt" contains a word per line
# iterate over the lines of the file

for line in open("/path/to/words.txt"):
    word = line[:-1]    # Get rid of trailing newline
    sorted_word = list(sorted(word.lower()))
    if sorted_word == sorted_anagram:
        found.append(word)
if found:
    print "Anagrams of %s:" % anagram
    for w in found:
        print w
else:
    print "No anagrams for %s" % anagram


--

Vincent Wehren






From jzgoda at gazeta.usun.pl  Sat Apr 16 17:35:35 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 16 Apr 2005 23:35:35 +0200
Subject: Python's use in RAD
In-Reply-To: <mailman.1972.1113576517.1799.python-list@python.org>
References: <mailman.1972.1113576517.1799.python-list@python.org>
Message-ID: <d3s0o0$2b3$1@nemesis.news.tpi.pl>

Ross Cowie napisa?(a):

> I am currenly a second year university student and was wondering if you 
> could help me ut. As part of a project i have decided to write about 
> python, i am not having very much luck with regards to finding 
> infrmation on pythons use in Rapid Application Development, and was 
> wondering of you could highlight some of the features that make it 
> suitable for RAD. Like the use of dinamic binding.

I develop applications in python on AS/400 really fast -- that is, 
rapidly ("five to eight" times faster comparing to Java, even more when 
comparing to RPG). Dynamic & strong typing, comprehensive standard 
library and clean syntax makes Python ideal for RAD event on such 
obscure platforms as i5 (formerly known as iSeries, formerly known as 
AS/400).

For me, at least.

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From rogerb at rogerbinns.com  Thu Apr 14 01:37:29 2005
From: rogerb at rogerbinns.com (Roger Binns)
Date: Wed, 13 Apr 2005 22:37:29 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net><mailman.1769.1113320562.1799.python-list@python.org><1o31j2-7l6.ln1@home.rogerbinns.com>
	<mailman.1876.1113453407.1799.python-list@python.org>
Message-ID: <n9c1j2-198.ln1@home.rogerbinns.com>

> Here is the situation I see. I use debian linux systems. Installing all the
> dependencies is trivial and if your program has a debian package it would be
> a single command.

Note that there is *nothing* precluding running using the system Python
other than you have to have the dependencies present.  In fact that is how
all the developers run.  The binary/frozen packages are provided as a
convenience to the users who just want to use the program and I don't
see any need for them to jump through hoops.

> The reason I don't like these programs that built the
> runtime, static link in a bunch of stuff etc is that it is a pain to upgrade
> later.

True.  People on both Gentoo and Debian have told me they are making
proper ebuild/dkpg for BitPim.  In both cases nothing came of it
which is why I tell people on those systems to just use the rpm.

As far as I can tell, they failed at two hurdles.  One is that there
is a new BitPim release every two weeks and they can't really keep up
with that.  (eg it takes around two weeks for packages with a lot of
attention on Gentoo to become stable and often is a lot longer)

The second is dealing with the dependencies.  The packager is trying
to do BitPim and finds they have to work with others or need assistance
to deal with the dependencies.  Gentoo is months out of date for wxPython
and I have no idea how far behind Debian is.  Typically other dependencies
aren't even packaged at all, even though they use distutils (ie all it
takes is figuring out how to do 'python setup.py install' in a way that
keeps the packaging system happy).

> If there is a security fix to python 2.4 I know there is ONE copy
> installed on the system and that updating it will fix it. If there is a
> problem with libpng, libjpeg, kdelibs, zope, apache etc the same is still
> true, there is only ONE copy of those items on the system and with a single
> command all of them can be updated and fixed.

True.  Noone forces you to install/run anything.  Right now someone on Debian
who wants to use BitPim has one of these choices:

  - Fix Debian's packaging so that it contains all of the dependencies and
    BitPim itself with the latter being updated every two weeks.  This will
    keep your scenario above on the right track.

  - Bypass Debian's packaging and install the various dependencies manually
    and run from "source"

  - Use alien and the rpm

> Keeping track of security updates, feature updates etc for a bunch of
> computers with a lot of software from different locations is a royal pain in
> the neck.

True.  And the reality is that various Python packages are backwaters/low
priority for the packagers.  All it takes is one missing dependency to
throw a spanner in the works.

And as I told the person who originally wanted to package BitPim for Debian,
I will supply all the help and make changes as necessary.  Someone from the
distros has to step forward to complete it.

Roger 




From quentel.pierre at wanadoo.fr  Thu Apr  7 15:07:29 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Thu, 07 Apr 2005 21:07:29 +0200
Subject: Web application toolkit recommendation?
In-Reply-To: <1112846308.216502.287610@o13g2000cwo.googlegroups.com>
References: <mailman.1333.1112659316.1799.python-list@python.org>
	<1112780472.948835.232070@f14g2000cwb.googlegroups.com>
	<1112846308.216502.287610@o13g2000cwo.googlegroups.com>
Message-ID: <425584f1$0$1254$8fcfb975@news.wanadoo.fr>

stewart.midwinter at gmail.com a ?crit :
> I have looked briefly at Karrigell. does it support user logins?
> 
> S
> 
Yes, you can take a look at the "portal" demo to see how it works

Regards,
Pierre


From juggs at dfgt.com  Thu Apr 21 16:34:03 2005
From: juggs at dfgt.com (ionic)
Date: Thu, 21 Apr 2005 21:34:03 +0100
Subject: New line
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
	<mailman.2246.1114115139.1799.python-list@python.org>
Message-ID: <42680edf_3@mk-nntp-2.news.uk.tiscali.com>


Ok sorry guys,

using the python gui, if i hit the 'enter' key python just executes what
ever ive typed.  It doesnt take me to the next line.

How do i type several lines without executing after each line?

Cheers
--

"It's all in fun or life isn't worth it!"


"James Stroud" <jstroud at mbi.ucla.edu> wrote in message
news:mailman.2246.1114115139.1799.python-list at python.org...
> In the absence of any context to this question: Hit the button that says
> "Enter".
>
> James
>
> On Thursday 21 April 2005 01:15 pm, ionic wrote:
> > Hi all
> >
> > This is probably going to sound very dull but, how do you get to the
next
> > line after youve finished typing the first line?
> >
> > Thanks in advance
> >
> > --
> >
> > "It's all in fun or life isn't worth it!"
>
> --
> James Stroud
> UCLA-DOE Institute for Genomics and Proteomics
> Box 951570
> Los Angeles, CA 90095
>
> http://www.jamesstroud.com/




From harlinseritt at yahoo.com  Sun Apr 10 07:30:41 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 10 Apr 2005 04:30:41 -0700
Subject: very simple tkinter demo program
In-Reply-To: <oE76e.1206995$35.44444963@news4.tin.it>
References: <aQX5e.1205416$35.44366592@news4.tin.it>
	<9NidnQVTQ9LKMMXfRVn-tQ@adelphia.com>
	<oE76e.1206995$35.44444963@news4.tin.it>
Message-ID: <1113132641.420742.125900@f14g2000cwb.googlegroups.com>

Max,

Thanks and good job!

Harlin



From yuba at conwaycorp.net  Sun Apr 10 15:48:34 2005
From: yuba at conwaycorp.net (yuba at conwaycorp.net)
Date: Sun, 10 Apr 2005 14:48:34 -0500
Subject: Creating a Package
Message-ID: <1113162514.425983126f4f1@mail.conwaycorp.net>

I have written an object to handle dealing with fixed and delimited records
[Note: This is the routine I talked about at PyCon and many wanted to me help
out but I lost your names.  There's still work to be done so email me if you're
still interested].

Most of the version 1.0 heavy lifting is complete, but I need some help turning
the routine into a package and creating the install scripts for windows and
*nix.

If you want to help with the development of the package (and there's still a lot
I want to do), please get in touch.  Look for it on sourceforge; the project
name is pyDataSegment.  If someone can teach me how to turn this into a package
and/or create install scripts, please drop me a line.  I think the routine will
be useful in the IT community; I have used it in one form or another for over 5
years and would like to give it to others.

Thanks for your help,
--greg



-----------------------------------------------------------------------------
This message was sent using Conway Corporation WebMail -- www.conwaycorp.net


From apardon at forel.vub.ac.be  Fri Apr  1 02:50:21 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 1 Apr 2005 07:50:21 GMT
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
	<1112278104.651390.305160@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd4pv9s.20i.apardon@rcpc42.vub.ac.be>

Op 2005-03-31, pyguy2 at gmail.com schreef <pyguy2 at gmail.com>:
> Cool Code!
>
> One possible sticking point is that I  think select only works on
> network sockets on windows. This would make the code not crossplatforn.

As far as I understand, what I did with pipes, can be done just as
fine with network sockets. If someone want to rewrite the code
to do so and make the code more crossplatform, I'll happily
incorperate it. I'm just not familiar enough with sockets to do
it myself.

-- 
Antoon Pardon


From chirayuk at gmail.com  Sun Apr  3 05:22:51 2005
From: chirayuk at gmail.com (chirayuk)
Date: 3 Apr 2005 01:22:51 -0800
Subject: Corectly convert from %PATH%=c:\\X; "c:\\a;
	b" TO ['c:\\X', 'c:\\a; b']
References: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>
	<mailman.1249.1112491243.1799.python-list@python.org>
Message-ID: <1112520171.853820.90010@o13g2000cwo.googlegroups.com>

Michael Spencer wrote:
> chirayuk wrote:
> > Hi,
> >
> > I am trying to treat an environment variable as a python list - and
I'm
> > sure there must be a standard and simple way to do so. I know that
the
> > interpreter itself must use it (to process $PATH / %PATH%, etc) but
I
> > am not able to find a simple function to do so.
> >
> > os.environ['PATH'].split(os.sep) is wrong on Windows for the case
when
> > PATH="c:\\A;B";c:\\D;
> > where there is a ';' embedded in the quoted path.
> >
> > Does anyone know of a simple way (addons ok) which would do it in a
> > cross platform way? If not - I will roll my own. My search has
shown
> > that generally people just use the simple split menthod as above
and
> > leave it there but it seemed like such a common operation that I
> > believe there must be a way out for it which I am not seeing.
> >
> > Thanks,
> > Chirayu.
> >
> You may be able to bend the csv module to your purpose:
>
>
>   >>> test = """\"c:\\A;B";c:\\D;"""
>   >>> test1 = os.environ['PATH']
>   >>> import csv
>   >>> class path(csv.excel):
>   ...     delimiter = ';'
>   ...     quotechar = '"'
>   ...
>   >>> csv.reader([test],path).next()
>   ['c:\\A;B', 'c:\\D', '']
>   >>> csv.reader([test1],path).next()
>   ['C:\\WINDOWS\\system32', 'C:\\WINDOWS',
'C:\\WINDOWS\\System32\\Wbem',
> 'C:\\Program Files\\ATI Technologies\\ATI Control Panel',
> 'C:\\PROGRA~1\\ATT\\Graphviz\\bin',
'C:\\PROGRA~1\\ATT\\Graphviz\\bin\\tools',
> 'C:\\WINDOWS\\system32', 'C:\\WINDOWS',
'C:\\WINDOWS\\System32\\Wbem',
> 'C:\\Program Files\\ATI Technologies\\ATI Control Panel',
> 'C:\\PROGRA~1\\ATT\\Graphviz\\bin',
'C:\\PROGRA~1\\ATT\\Graphviz\\bin\\tools',
> 'c:\\python24', 'c:\\python24\\scripts',
'G:\\cabs\\python\\pypy\\py\\bin']
>   >>>
>
> HTH
> Michael

That is a cool use of the csv module.

However, I just realized that the following is also a valid PATH in
windows.

PATH=c:\A"\B;C"\D;c:\program files\xyz"
(The quotes do not need to cover the entire path)

So here is my handcrafted solution.

def WinPathList_to_PyList (pathList):
    pIter = iter(pathList.split(';'))
    OddNumOfQuotes = lambda x: x.count('"') % 2 == 1
    def Accumulate (p):
        bAcc, acc = OddNumOfQuotes(p), [p]
        while bAcc:
            p = pIter.next ()
            acc.append (p)
            bAcc = not OddNumOfQuotes (p)
        return "".join (acc).replace('"','')
    return [q for q in [Accumulate (p) for p in pIter] if q]


So now I need to check if the os is windows.

Wishful thinking: It would be nice if something like this (taking care
of the cases for other OS's) made it into the standard library - the
interpreter must already be doing it.

Thanks,
Chirayu.



From fredrik at pythonware.com  Fri Apr 15 17:55:50 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 15 Apr 2005 23:55:50 +0200
Subject: py2exe - create one EXE
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com><mailman.1977.1113579964.1799.python-list@python.org><1113580317.027071.183640@z14g2000cwz.googlegroups.com><1113582492.351604.257570@z14g2000cwz.googlegroups.com><1113584585.082256.246110@z14g2000cwz.googlegroups.com>
	<b273c74105041510196bff2c9e@mail.gmail.com>
Message-ID: <d3pd18$jj0$1@sea.gmane.org>

James Carrol wrote:

> I like that you can automatically invoke NSIS and create an installer,
> but I thought the question was how can all of the libraries be in a
> single runnable program executable (not a program that installs, but
> the program that you wrote.)

the wiki recipe does exactly that -- it creates one EXE, which *temporarily*
unpacks the components that have be in separate files for Windows to find
them.  when you terminate the program, the files are removed.

> I don't think you can do this, because (unless you have your own
> version of python that statically links with all of the module's
> native code that you need) you would have to have some code that loads
> DLLs that are packed in your executable at the moment that the import
> happens for that module.

there are commerical libraries available that overrides Win32 API calls
so they fetch data from resources rather than disk files.  but given that
disks are fast and disk space is cheap, it's hardly worth the effort.

</F>



From Scott.Daniels at Acm.Org  Sun Apr 24 20:02:32 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 24 Apr 2005 17:02:32 -0700
Subject: How to "generalize" a function?
In-Reply-To: <yfs3btfahb5.fsf@black4.ex.ac.uk>
References: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
	<yfs3btfahb5.fsf@black4.ex.ac.uk>
Message-ID: <426c2dc5$1@nntp0.pdx.net>

Alexander Schmolck wrote:
> [1]  Best practice would be something like this (don't worry to much about it
>      -- it just ensures the file is properly closed, even if something goes
>      wrong):
> 
>         confFile = None
>         try:
>             confFile = open(networkConf, 'w')
>             confFile.writelines(conf)
>         finally:
>             if confFile: confFile.close()
> 

A clearer equivalent is:
     confFile = open(networkConf, 'w')
     try:
         confFile.writelines(conf)
     finally:
         confFile.close()


You did not say whether you are looking to replace all, the first,
or the last occurrence of your search target.  Assuming you really
mean all lines and the first occurrence on those lines:

     def replaces(source, search, replacement):
         '''Replace first of search on lines with replacement'''
         pat = re.compile(search)
         for line in source:
             yield re.sub(pat, replacement, line, 1)

And your application might go like:

     input = open(networkConf, 'r')
     part1 = replaces(input, 'address', 'ip')
     part2 = replaces(part1, 'netmask', 'mask')
     result = list(part2)
     input.close()
     output = open(networkConf, 'w')
     try:
         output.writelines(result)
     finally:
         output.close()


--Scott David Daniels
Scott.Daniels at Acm.Org


From auch-ich-m at g-kein-spam.com  Wed Apr 13 05:51:13 2005
From: auch-ich-m at g-kein-spam.com (=?ISO-8859-1?Q?Andr=E9?= Malo)
Date: Wed, 13 Apr 2005 11:51:13 +0200
Subject: email: Content-Disposition and linebreaks with long filenames
References: <d3ik62$4rm$1@beech.fernuni-hagen.de>
Message-ID: <d3iq2e$lo4$1@news.web.de>

* Martin K?rner <me at mkone.net> wrote:

> I am using email module for creating mails with attachment (and then 
> sending via smtplib).
> 
> If the name of the attachment file is longer than about 60 characters 
> the filename is wrapped in the Content-Disposition header:
> 
> Content-Disposition: attachment;
> 	filename="This is a sample file with a very long filename
> 	0123456789.zip"
> 
> 
> This leads to a wrong attachment filename in email clients - the space 
> after "filename" is not shown or the client displays a special character 
> (the linbreak or tab before 0123456789.zip).

Yeah, this is badly applied header folding. You can circumvent it by
encoding the filename parameter according to
<http://ftp.rfc-editor.org/in-notes/rfc2184.txt>

Note that parameter continuation ala filename*1="..."; filename*2="...." is not
really supported by MUAs, but support for filename*="..." seems to be a /bit/ better.

nd


From steven.bethard at gmail.com  Mon Apr 18 12:06:48 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 18 Apr 2005 10:06:48 -0600
Subject: Removing dictionary-keys not in a set?
In-Reply-To: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
Message-ID: <ftOdnRzAB6SFRv7fRVn-hg@comcast.com>

Tim N. van der Leeuw wrote:
> Hi,
> 
> I'd like to remove keys from a dictionary, which are not found in a
> specific set. So it's kind of an intersection-operation.
> 
> I can create a new dictionary, or a loop over all keys and test them
> for set-membership, but I was wondering if there was a smart way to
> express this in 1 or 2 concise statements that I'm not aware of.
> 
> So are there smarter ways to get the intersection of dictionary and set
> into a dictionary than the following pseudo-code:
> 
> # Variation 1
> d2 = {}
> for key in s: d2[key] = d1[key]
> 
> # Variation 2
> for key in d.iterkeys(): if key not in s: del d[key]

You could try a generator expression:

py> d = {1: 2, 3: 4, 5: 6, 7: 8, 9: 10}
py> s = set([1, 5, 7])
py> dict((k, v) for k, v in d.iteritems() if k in s)
{1: 2, 5: 6, 7: 8}

Note that your variation 2 won't work:

py> for key in d.iterkeys():
...     if key not in s:
...         del d[key]
...
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
RuntimeError: dictionary changed size during iteration

You can make it work using keys() instead of iterkeys():

py> for key in d.keys():
...     if key not in s:
...         del d[key]
...
py> d
{1: 2, 5: 6, 7: 8}

But I think I'd probably lean towards the generator expression...

STeVe


From grante at visi.com  Thu Apr 28 13:10:20 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 28 Apr 2005 17:10:20 -0000
Subject: split question
References: <1114707749.969274.293560@l41g2000cwc.googlegroups.com>
Message-ID: <117267s8lfa5b7@corp.supernews.com>

On 2005-04-28, alexk <alexk at mailinator.com> wrote:
> I've a simple question. Why the following:
>
> words = "123#@$#$@^%[wordA] wordB#@$".split('~`!@#$%^&*()_+-=[]{},./')
>
> doesn't work?

But it does work.  Your input string (the one on the left) does
not contain the delimiter string you're passing to the split()
method.  The argument to split() is a delimiter string not a
set of delimter characters.

> The length of the result vector is 1.

Yup :)

-- 
Grant Edwards                   grante             Yow!  This MUST be a good
                                  at               party -- My RIB CAGE is
                               visi.com            being painfully pressed up
                                                   against someone's MARTINI!!


From tim.golden at viacom-outdoor.co.uk  Tue Apr 19 11:49:04 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 19 Apr 2005 16:49:04 +0100
Subject: Name/ID of removable Media: how?
Message-ID: <9A28C052FF32734DACB0A288A3533991EBB78F@vogbs009.gb.vo.local>

[Ivan Van Laningham]
| Hi All--
| 
| Tim Golden wrote:
| > 
| > Try this: hex (-793919769)
| > 
| > You might need to check back on recent discussions here re
| > negative / positive numbers and hexadecimal.
| > 
| > (Short version: we used to treat hex numbers with the top bit
| > set as negative decimal numbers; now only negative hex numbers
| > are negative decimals)
| > 
| 
| 
| Of course I tried that.  Did you?
| 
| 
| Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
| win32
| Type "help", "copyright", "credits" or "license" for more information.
| >>> hex (-793919769)
| '-0x2f524119'
| >>>
| 

Yes I did. I just forgot to mention the critical fact that I'm still using 2.3.5:

<dump>

Python 2.3.5c1 (#61, Jan 25 2005, 19:52:06) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> hex (-793919769)
__main__:1: FutureWarning: hex()/oct() of negative int will return a signed string in Python 2.4 and up
'0xd0adbee7'
>>>
>>>

</dump>

TJG	

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
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From sdementen at hotmail.com  Mon Apr 11 06:31:23 2005
From: sdementen at hotmail.com (Sebastien de Menten)
Date: 11 Apr 2005 03:31:23 -0700
Subject: args attribute of Exception objects
References: <mailman.1526.1112952761.1799.python-list@python.org>
	<pan.2005.04.08.16.07.30.85408@jerf.org>
Message-ID: <8dad5312.0504110231.68f6a21b@posting.google.com>

Jeremy Bowers <jerf at jerf.org> wrote in message news:<pan.2005.04.08.16.07.30.85408 at jerf.org>...
> On Fri, 08 Apr 2005 09:32:37 +0000, S??bastien de Menten wrote:
> 
> > Hi,
> > 
> > When I need to make sense of a python exception, I often need to parse the 
> > string exception in order to retrieve the data.
> 
> What exactly are you doing with this info? (Every time I started to do
> this, I found a better way. Perhaps one of them will apply for you.)
> 
> (As a general comment, I'd point out that you don't have to check the
> entire error message; checking for a descriptive substring, while still
> not "safe", is at least safe*r*.)

I have symbolic expressions in a dictionnary like:

dct = dict( a = "b**2 + c", b = "cos(2.3) + sin(v)", v = "4", c =
"some_very_expensive_function(v)")

I want to build a function that finds the links between all those
expressions (think about computing dependencies between cells in a
spreadsheet).

All I do is:
def link(name):
   dependencies = {}
   while True:
      try:
         eval(dct[name], globals(), dependencies)
      except NameError,e:
         dependencies[e.args[0][6:-16]] = 1
      else:
         return dependencies

globals() can be replaced by a custom dictionnary for security
purposes.
variation on the theme can:
  - check SyntaxError and give interlligent feedback to user (BTW,
SyntaxError args are much smarter)
  - find or/and eval recursively the whole tree and keep in cache
values,...

Seb


From roy at panix.com  Sun Apr  3 21:16:28 2005
From: roy at panix.com (Roy Smith)
Date: Sun, 03 Apr 2005 21:16:28 -0400
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <7x3bu8t7or.fsf@ruckus.brouhaha.com>
	<mailman.1272.1112567512.1799.python-list@python.org>
	<7xacofo1j0.fsf@ruckus.brouhaha.com> <42508bf3$1@nntp0.pdx.net>
Message-ID: <roy-01D8DB.21162803042005@reader1.panix.com>

Scott David Daniels <Scott.Daniels at Acm.Org> wrote:
> Any code depending upon __debug__ being 0 won't be tested.  Sometimes
> test structures update values as a side-effect of tracking the debugging
> state.  Not massively likely, but it makes for a scary environment when
> your tests cannot be run on a non-debug version.
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org

What would happen if you defined

def verify (value):
   if not value:
      throw AssertionError

and then everyplace in your py.test suite where you would normally have 
done "assert foo", you now do "verify (foo)"?  A quick test shows that it 
appears to do the right thing.  I made a little test file:

------------------------------
#!/usr/bin/env python

def verify (value):
    if not value:
        raise AssertionError

class Test_foo:
    def test_one (self):
        assert 0

    def test_two (self):
        verify (0)
------------------------------

when I run that with "python py.test", I get two failures.  When I run it 
with "python -O py.test", I get one pass and one fail, which is what I 
expected to get if the assert gets optimized away.

The output is a little more verbose, since it shows the exception raised in 
verify(), but it gives you a stack dump, so it's not that hard to look one 
frame up and see where verify() was called from.

It's interesting that given the penchant for light-weight-ness in py.test, 
that the default output is so verbose (and, to my mind, confusing) compared 
to unittest.  I guess one could write their own output formatter and cut 
down on the verbosity?


From msoulier at gmail.com  Tue Apr 19 22:43:15 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Tue, 19 Apr 2005 22:43:15 -0400
Subject: Importing some functions from a py file
In-Reply-To: <20050420021313.34955.qmail@web54509.mail.yahoo.com>
References: <20050420021313.34955.qmail@web54509.mail.yahoo.com>
Message-ID: <fb6605670504191943141afef0@mail.gmail.com>

On 4/19/05, Anthony Liu <antonyliu2002 at yahoo.com> wrote:
> But every time, I run code2.py, the main() of code1.py
> is run.

You probably did not protect your main function in both modules. 

ie. 

if __name__ == '__main__': main()

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'
Jabber: msoulier at digitaltorque.ca


From flupke at nonexistingdomain.com  Mon Apr 18 04:57:46 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Mon, 18 Apr 2005 08:57:46 GMT
Subject: Glade for Windows and Python
In-Reply-To: <Pr2dnYstzcxopv3fRVn-oQ@bright.net>
References: <Pr2dnYstzcxopv3fRVn-oQ@bright.net>
Message-ID: <eEK8e.67703$Tw4.4786219@phobos.telenet-ops.be>

Richard Lyons wrote:
> Has anyone been successful in using Glade for Windows with Python?

Yeah, i'm using it right now.
See the previous email for the links

Benedict


From tomi.lindberg.NO_SPAM at pp.inet.fi.invalid  Sun Apr 10 20:34:14 2005
From: tomi.lindberg.NO_SPAM at pp.inet.fi.invalid (Tomi Lindberg)
Date: Mon, 11 Apr 2005 00:34:14 GMT
Subject: Unit tests in Leo
In-Reply-To: <1113123204.994313.91290@f14g2000cwb.googlegroups.com>
References: <fKI5e.3$7K4.2@read3.inet.fi>
	<1113123204.994313.91290@f14g2000cwb.googlegroups.com>
Message-ID: <aCj6e.418$4Y5.74@read3.inet.fi>

ajikoe at gmail.com wrote:

> Hello Tomi,
> 
> I'm not really sure about your question, but concerning unit testing
> you can do a simple test.

No problem. I found the Leo forums at Source Forge and I've 
already received some answers in there. Thanks for replying 
though.

-- 
"Nowhere in me is the presence of god
Nor do I need him or want him around"

     Deicide - Standing in the Flames

---
If you wish to send me an e-mail, remove .NO_SPAM and 
.invalid from the address.


From donmcdaniel2005 at yahoo.com  Sat Apr 30 11:58:23 2005
From: donmcdaniel2005 at yahoo.com (Donald L McDaniel)
Date: Sat, 30 Apr 2005 08:58:23 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
	<LXsce.2698$zu.1067@newssvr13.news.prodigy.com>
	<OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
	<1114831490.664193.236140@l41g2000cwc.googlegroups.com>
Message-ID: <eJOor1ZTFHA.228@TK2MSFTNGP10.phx.gbl>

Johnny Gentile wrote:
> Donald - go away. Far away. Now.
> And, for the last time (hopefully), stop crossposting to
> rec.music.beatles.
> Go sell crazy somewhere else. We're all stocked up.
>
> Donald L McDaniel wrote:
>> AKA wrote:
>>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>> news:%23ATbpqMTFHA.3980 at TK2MSFTNGP12.phx.gbl...
>>>> MC05 wrote:
>>>>> "sheltech" <quasara at earthlink.net> wrote in message
>>>>> news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
>>>>>>
>>>>>> "MC05" <smokerdude66 at myway.com> wrote in message
>>>>>> news:3dc8hjF6s5i2uU1 at individual.net...
>>>>>>>
>>>>>>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>>>>>> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>>>>>>>>
>>>>>>>> 4) I doubt seriously whether God plays a guitar, since guitars
>>>>>>>> are made by men, for men.  His Son could theoretically play a
>>>>>>>> guitar. Perhaps He does. Perhaps He doesn't.  Only the Father
>>>>>>>> and His Holy Angels know.
>>>>>>>
>>>>>>> So then Lucifer was a wicked bass player whose sex and drugs and
>>>>>>> rock n roll alientated the rest of the band and was fired?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> "Fired" ....  good one
>>>>>
>>>>> Heh.  Can't take credit for an accident.  Your eye is better than
>>>>> mine. :)
>>>>
>>>> The Devil has been fired...by God Himself.  Read the Book of
>>>> Revelation in the New Testament:  Satan's end is clearly outlined
>>>> by the Angel Jesus sent to St. John.  This end is very clear:  he
>>>> will be cast alive into the Lake which burns with fire and
>>>> brimstone, where he will be tormented day and night forever.
>>>>
>>>> Not only Satan and his angels will be cast into the Lake, but all
>>>> those who follow him and his servants.  I assure you, Satan won't
>>>> be ruling anyone in the Fire.  He will be in just as much torment
>>>> as his followers. Neither will he have any sort of job.
>>>>
>>>> I strongly advise you to stop making fun of things you have no
>>>> understanding of.  Your eternal destiny depends on the way you
>>>> treat others.
>>>>
>>>> --
>>>> Donald L McDaniel
>>>> Please reply to the original thread,
>>>> so that the thread may be kept intact.
>>>> ==============================
>>>>
>>> Just imagine if you actually had a coherent thought.
>>
>> My Bible tells me that the Truth sounds like foolishness to a
>> perishing man. Are you perishing?  God threw out a life-raft for
>> you.  Jesus is more than willing to rescue a drowning man.  Go to
>> the nearest church(Roman Catholic, Eastern Orthodox), and ask how
>> you can be saved from your sin.
>>
>> --
>> Donald L McDaniel
>> Please reply to the original thread,
>> so that the thread may be kept intact.
>> ==============================

1) I am posting to a newsgroup on the Microsoft Usenet Server.  It's not my 
fault the demon-lover who posted the original anti-Christian article 
cross-posted to so many newsgroups across so many servers.  Talk to him 
about cross-posting.
1) I will go away, when Christ returns for me.  I hope you are ready for His 
return, else you are in for a living Hell here on the Earth before the REAL 
Hell rises up to swallow you in its Flames.

-- 
Donald L McDaniel
Please reply to the original thread,
so that the thread may be kept intact.
============================== 




From ckwiguno at gmail.com  Sun Apr 24 23:09:34 2005
From: ckwiguno at gmail.com (Clara)
Date: 24 Apr 2005 20:09:34 -0700
Subject: opening new window in one window using Tkinter -- Help please
In-Reply-To: <1114369406.618811.316110@f14g2000cwb.googlegroups.com>
References: <1114365774.690048.280150@l41g2000cwc.googlegroups.com>
	<1114368587.303696.90130@l41g2000cwc.googlegroups.com>
	<mailman.2417.1114369026.1799.python-list@python.org>
	<1114369406.618811.316110@f14g2000cwb.googlegroups.com>
Message-ID: <1114398574.894930.168360@l41g2000cwc.googlegroups.com>

I've found the solution!!!!!!!! I must destroy the first window using
self.master.destroy(), but thanks anyway ^_^



From mauriceling at acm.org  Tue Apr 26 00:47:21 2005
From: mauriceling at acm.org (Maurice LING)
Date: Tue, 26 Apr 2005 14:47:21 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
Message-ID: <d4kh4q$tqf$1@domitilla.aioe.org>

> It is a nuisance. It's more of a nuisance when third part modules with
> 'c' components are compiled for the new version of python (a windows
> specific problem).
> 
> I did find that the last upgrade forced me to evaluate which extensions
> I actually used. The answer was 'a few less than I thought'. It became
> a good opportunity to spring clean my 'site-packages' folder.


I find this part of the story a nuisance, C components in 3rd party 
modules... What are the C components compiled into? What are actually 
"so" files?

I am using Fink to maintain my Python installation and Fink maintains 
the 3rd party libraries in /sw/lib/python2.3/site-packages. Imagine the 
trouble if I do a "fink selfupdate" and "fink update-all" and finds that 
my Python is replaced by a newer version, say Python 2.4. Then all my 
3rd party libraries in /sw/lib/python2.3/site-packages are un-usable... 
And I will have to re-download and re-install all the libraries again.

Yes, I do agree that it is a nice time to clean out "site-packages" but 
imagine the work of a system admin who has to re-install 50 packages... 
I do believe that we can use some help here, if possible... Perhaps 
someone can enlighten us on the technicalities of "so" files and/or C 
bindings in Python...

Now I understand that Python bytecodes are only dealing with pure python 
source codes. However, the same question lies, how can it (set of 
bytecodes) be made stable, like Java bytecodes, which are pretty stable? 
  Perhaps a better question will be, what techniques Java VM designers 
use that enables Java class files (and JAR files) to be stable and 
usable across versions that is lacking in Python?

Thanks.

Cheers
Maurice


From trentm at ActiveState.com  Mon Apr  4 13:50:25 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Mon, 4 Apr 2005 10:50:25 -0700
Subject: terminating an inactive process
In-Reply-To: <1112454348.28947.40.camel@dulcevida>
References: <1112454348.28947.40.camel@dulcevida>
Message-ID: <20050404175025.GC16567@ActiveState.com>

[Earl Eiland wrote]
> I'm running a PyWin program that executes another program using
> subprocess.Popen().  Unfortunately, this other program isn't well
> behaved, and frequently terminates without terminating its process. 
> After this happens enough times, all my memory is tied up, and the
> machine crashes.
> 
> Using subprocess.poll(), I can keep my program from hanging, by timing
> out the process, and starting anew.  This still leaves the previous
> process hogging memory.  How do I kill the old process in Windows?

You might be able to use or borrow code from my process.py module.
process.py is very similar to Python 2.4's subprocess. It provides a
ProcessOpen class (similar to subprocess' Popen). A ProcessOpen instance
has wait() and kill() methods that work fine on Windows. Under the hood
they are using the Win32 API WaitForSingleObject() and
TerminateProcess() functions.

    http://starship.python.net/~tmick/

Yes, I haven't updated process.py in a while. :) It works fine with
Python 2.3 and 2.4 (despite only saying Python 2.2 there). It *does*
rely on the PyWin32 extensions being installed with you Python
installation -- which you'll already have if you use ActivePython or
which you can install separately from here:

    http://sourceforge.net/project/showfiles.php?group_id=78018

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From ramen at lackingtalent.com  Thu Apr 28 16:09:03 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 28 Apr 2005 13:09:03 -0700
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <02o7k2-ka5.ln1@lairds.us>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<aeGdnR0QWZ8XYu3fRVn-vg@powergate.ca> <02o7k2-ka5.ln1@lairds.us>
Message-ID: <crbce.1962$i73.1117@okepread03>

Cameron Laird wrote:
> In article <aeGdnR0QWZ8XYu3fRVn-vg at powergate.ca>,
> Peter Hansen  <peter at engcorp.com> wrote:
> 
>>This meets your requirements as stated:
>>
>>def temp():
>>   foo.var = 1
>>
>>bind('a', temp)
>>
>>def temp():
>>   foo.var = 2
>>
>>bind('b', temp)
>>
>>del temp
> 
> Ewww!  *When* is lambda going bye-bye?  I apparently
> haven't been paying close enough attention.  Among other
> considerations, I still instruct people to use lambda for
> plenty of specific cases.

Well, IMNSHO, it's an empty threat that's been looming on the horizon 
for several years now. ;) Most recently, Guido mentioned his desire to 
remove the keyword in his post on Artima, which resulted in a huge debate:

http://www.artima.com/weblogs/viewpost.jsp?thread=98196

Note that in the OP's question, as with Peter's example above, you still 
can't do it with lambda alone, since you can't mix expressions with 
assignment. Nonetheless, lambda is nice for delaying binding, and 
combined with a helper function that sets attributes, it can produce the 
most concise solution:

bind('a', lambda: setattr(foo, 'var', 1))
bind('b', lambda: setattr(foo, 'var', 2))

The usual response is that you probably want to make a class anyway, and 
use bound methods for this type of stuff. But I find that in GUI/async 
programming, often you need a little dab of glue to connect events 
between objects, and lambda provides a nice way to avoid 
over-abstracting the problem.

We'll see how this all pans out in the next few years. I'm not too fond 
of removing features from a language for purely aesthetic reasons, but 
lambda's really stuck in a syntactic quandry due to the 
statement/expression dichotomy, so I can understand to some extent 
Guido's desire to remove it.

Dave


From rune.strand at gmail.com  Fri Apr 15 23:52:40 2005
From: rune.strand at gmail.com (runes)
Date: 15 Apr 2005 20:52:40 -0700
Subject: Piping data into script under Win32
In-Reply-To: <mailman.1995.1113621834.1799.python-list@python.org>
References: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
	<mailman.1992.1113618215.1799.python-list@python.org>
	<1113619417.667245.148500@g14g2000cwa.googlegroups.com>
	<mailman.1995.1113621834.1799.python-list@python.org>
Message-ID: <1113623560.124068.115650@l41g2000cwc.googlegroups.com>

Thanks James!  I'll post the explanation if I find it ;-)

Rune



From mwm at mired.org  Fri Apr 22 18:34:39 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 17:34:39 -0500
Subject: In defense of Visual Basic
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<d48cu8$1a9$1@news.doit.wisc.edu> <HOadnbQkd5fxmvTfRVn-og@powergate.ca>
	<1114182776.534932.264940@f14g2000cwb.googlegroups.com>
Message-ID: <86oec6sao0.fsf@guru.mired.org>

beliavsky at aol.com writes:
> Much snobbery is directed at Visual Basic and other dialects of Basic
> (they even have "basic" in their name), but I think VBA is better
> designed than the prestigious C in some important ways.

C and VBA have totally different application domains. Given any two
such languages, it's almost a given that either one will be better
than the other "in some important ways".

> It is trivial to allocate and pass multidimensional arrays in VBA, but
> C requires expertise with pointers. The subroutine print_matrix can
> query the dimensions of xmat, so they don't need to be passed as
> separate arguments, as in C. The fact that is tricky to do simple
> things is a sign of the poor design of C and similar languages, at
> least for non-systems programming.

Since C was desinged as a systems programming language, evaluating
it's design for non-systems programming is a pointless exercise.

Personally, I think of C as a "portable assembler". You write
time-critical code, important applications, and the kernel in it. You
let your HLL compilers generate it. Other than that, you ignore it.

> People bash VB as a language the corrupts a programmer and prevents him
> from ever becoming a "real" programmer. Maybe VB programmers quickly
> get so productive with it that they don't need to fuss with trickier
> languages.

I've not really heard a lot of nasty comments about VB, though I have
about BASIC. Nuts, I've said a lot of nasty things about BASIC. But VB
is so far removed from the BASICs I worked with that the point is
moot.

I have heard that VB is much more productive than "conventional
languages" (usually meaning C/C++/COBOL/etc.). Then again, this is
ture of modern "scripting" languages. That's where VB started life,
even though it's now compiled. So this should come as no surprise.

     <mieke
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From rkern at ucsd.edu  Mon Apr 11 16:09:35 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 11 Apr 2005 13:09:35 -0700
Subject: where is python.h? / NumPy installation
In-Reply-To: <1ba41a18.0504110617.3746a6d2@posting.google.com>
References: <1ba41a18.0504110617.3746a6d2@posting.google.com>
Message-ID: <d3elce$otl$1@sea.gmane.org>

martino wrote:
> Hi, I am trying to install NumPy (v23.8) onder Macosx (panther
> version). Python (v2.3) is bundled into panther and I installed the
> IDE on top of that. After having untarred the source distribution in
> the desktop directory and typed
> 
> 
>>python setup.py install
> 
> 
> as recommended in the attached documentation, I get:
> 
> running install
> running build
> running build_py
> running build_ext
> building '_numpy' extension
> gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp
> -mno-fused-madd -fno-common -dynamic -DNDEBUG -g -O3 -Wall
> -Wstrict-prototypes -I/System/Library/Frameworks/vecLib.framework/Headers
> -IInclude -IPackages/FFT/Include -IPackages/RNG/Include
> -I/System/Library/Frameworks/Python.framework/Versions/2.3/include/python2.3
> -c Src/arrayobject.c -o
> build/temp.darwin-7.8.0-Power_Macintosh-2.3/Src/arrayobject.o
> Src/arrayobject.c:18:20: Python.h: No such file or directory
> In file included from Src/arrayobject.c:26:
> Include/Numeric/arrayobject.h:24: parse error before '*' token
> Include/Numeric/arrayobject.h:24: warning: type defaults to `int' in
> declaration of `PyArray_GetItemFunc'
> Include/Numeric/arrayobject.h:24: warning: data definition has no type
> or storage class
> Include/Numeric/arrayobject.h:25: parse error before '*' token
> Include/Numeric/arrayobject.h:25: warning: function declaration isn't
> a prototype
> 
> + zilions of error messages that probably stem from this first error
> (i.e. not finding this Python.h file). Now I have looked everywhere
> else on the hard drive and Python.h is nowhere to be seen. Should I
> install something else before attempting to install NumPy (but what?).
> Thanks a lot.

It *should* be
/System/Library/Frameworks/Python.framework/Versions/2.3/include/python2.3/Python.h

In the meantime, you can snag a pre-built Numeric from

   http://pythonmac.org/packages/

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From rbt at athop1.ath.vt.edu  Tue Apr 26 11:46:51 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 26 Apr 2005 11:46:51 -0400
Subject: delete will assure file is deleted?
In-Reply-To: <1114512016.930540.164920@g14g2000cwa.googlegroups.com>
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
Message-ID: <d4lnpb$5gj$1@solaris.cc.vt.edu>

ajikoe at gmail.com wrote:
> Hello Mike,
> I have to know this topic otherwise my program has to check whether the
> file / files are already deleted and this is a little bit messy.
> 
> Pujo
> 

How about checking with isfile() before and after?


From kay.schluehr at gmx.net  Tue Apr 26 01:27:31 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 25 Apr 2005 22:27:31 -0700
Subject: Injecting code into a function
In-Reply-To: <1114470993.307543.133770@z14g2000cwz.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
	<1114457804.600476.324860@o13g2000cwo.googlegroups.com>
	<1114470993.307543.133770@z14g2000cwz.googlegroups.com>
Message-ID: <1114493251.818250.6580@g14g2000cwa.googlegroups.com>


Lonnie Princehouse wrote:
> I don't know of a way to get the current global trace function.  This
> could certainly cause trouble if you're trying to be compatible with
> other packages that want to use their own trace functions (like
psyco,
> or debuggers).   Does anyone know how to get the global trace?
>
> On the other hand, the local trace function is in the f_trace
attribute
> of a frame.

Oh, I overlooked this. Then the solution becomes simple:

   sys._getframe().f_trace

Test:

>>> an = Analyzer()
>>> sys.settrace(an.trace_returns)
>>> sys._getframe().f_trace
<bound method Analyzer.trace_returns of <__main__.Analyzer instance at
0x010015D0>>


> It looks like global trace functions only get the "call" event, and
are
> expected to return a local trace function that will receive "line"
and
> "return" events, so you will need a global trace in order to set
local
> traces (setting myframe.f_trace explicitly doesn't seem to do it).

I think that Your trace_returns function is actually a global trace
that returns itself and does not handle the 'call' event.

If You look at the code in the debug-module bdb.py the 'call' event
gets handled by the local trace function dispactch_call():

    def trace_dispatch(self, frame, event, arg):
        if self.quitting:
            return # None
        if event == 'line':
            return self.dispatch_line(frame)
        if event == 'call':
            return self.dispatch_call(frame, arg)
        if event == 'return':
            return self.dispatch_return(frame, arg)
        if event == 'exception':
            return self.dispatch_exception(frame, arg)
        print 'bdb.Bdb.dispatch: unknown debugging event:', `event`
        return self.trace_dispatch

Ciao,
Kay



From Michael.Coll-Barth at VerizonWireless.com  Fri Apr 22 15:28:52 2005
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Fri, 22 Apr 2005 15:28:52 -0400
Subject: Python licence again
Message-ID: <20050422192857.2C9801E4002@bag.python.org>


That should be 'heeding'.

From: 
python-list-bounces+michael.coll-barth=verizonwireless.com at python.org
[mailto:python-list-bounces+michael.coll-barth=verizonwireless.com at pytho
n.org]On Behalf Of fuzzylollipop
Sent: Friday, April 22, 2005 3:23 PM
To: python-list at python.org
Subject: Re: Python licence again


try spelling license correctly next time and heading the google
suggestions that probably looked like "didn't you mean : Python License"
___________________________________________________________________
The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From fowlertrainer at anonym.hu  Tue Apr  5 08:07:14 2005
From: fowlertrainer at anonym.hu (fowlertrainer at anonym.hu)
Date: Tue, 05 Apr 2005 14:07:14 +0200
Subject: Python IDE like NetBeans/Delphi IDE
Message-ID: <42527F72.5000909@anonym.hu>

Hi !

I search for an IDE that working in Windows, and knows these functions:

A.) Automatic name searching/showing/extending on classes with 
keypressing (like Netbeans, or Delphi Ctrl+Space).
B.) Debugging: breakpoints, step on lines (code), watch variables.

Or A and B both.

Please help me.

Thanx:
 ft
 


From pinard at iro.umontreal.ca  Thu Apr 14 10:18:08 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Thu, 14 Apr 2005 10:18:08 -0400
Subject: Compute pi to base 12 using Python?
In-Reply-To: <425df968.336304930@news.oz.net>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
	<see-414FAA.23143013042005@news.frontiernet.net>
	<425df968.336304930@news.oz.net>
Message-ID: <20050414141808.GB17342@phenix.progiciels-bpi.ca>

[Bengt Richter]

> It might also be interesting to keep a running sum of the base 12
> values and use sum % 88 to select piano keys, to let it walk intervals
> outside of a single octave ;-)

The generated would then run from the low octaves to high octaves
monotically, then start over again and again.

Maybe a more interesting approach might be to pick the note in the same
octave, the octave below or above, where the new note is closest to the
preceding one.

> a "random" walk picture was interesting.

Using the closest note would have similarity with a random walk, given
? digits are seemingly random.  On a random walk, one gets away from
the departure point on average, the distance being proportional to
sqrt(N) where N is the number of steps.  So, when using the closest
note, one would need a corrective device nevertheless so notes are kept
near the middle of the range of comfortable audible frequencies.

> Anyone have an easy python midi interface for windows to play on the
> sound card?  I could generate a .wav file to play tones, but midi
> would be much more compact ;-)

There are surely many.  I use my own (Python) interfaces on Linux, and
even there, by combining a few tools, it is rather easy to get .WAV
files out of MIDI.  In any case, googling around might help.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From martijn at gamecreators.nl  Fri Apr  1 07:08:14 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 1 Apr 2005 04:08:14 -0800
Subject: Spider - path conflict [../test.htm,www.nic.nl/index.html]
Message-ID: <1112357294.881735.287370@o13g2000cwo.googlegroups.com>

H!

I thought I was ready with my own spider...
But then there was a bug, or in other words a missing part in my code.

I forget that people do this in website html:
<a href="http://www.nic.nl/monkey.html">is oke</a>
<a href="../monkey.html">error</a>
<a href="../../monkey.html">error</a>

So now i'm trying to fix my spider but it fails and it fails.
I tryed something like this.

------------------------
import urlparse
import string

def fixPath(urlpath,deep):
    path=''
    test = urlpath.split('/',deep)
    for this in test:
        if this<>'' and this.count('.')==0:
            path=path+'/'+this
    return path

def fixUrl2(src,url):
    url = urlparse.urlparse('http://'+url)
    src = urlparse.urlparse('http://'+src)

    if url[2]:
        thepath = fixPath(url[2],url[2].count('/')-(src[2].count('/')))

    if src[1] == '..':
        if url[1]<>'':
            theurl = url[1]+''+thepath+''+src[2].replace('../','')

    print theurl

fixUrl2('../monkey2.html','www.nic.nl/test/info/monkey1.html')
fixUrl2('../../monkey2.html','www.nic.nl/test/info/monkey1.html')
fixUrl2('../monkey2.html','www.nic.nl/info/monkey1.html')
------------------------

info:
fixUrl2('a new link found','in this page')

I hope someone knows a professional working code for this,
Thanks a lot,
GC-Martijn



From __peter__ at web.de  Sun Apr  3 04:34:01 2005
From: __peter__ at web.de (Peter Otten)
Date: Sun, 03 Apr 2005 10:34:01 +0200
Subject: Name of IDLE on Linux
References: <mailman.1242.1112466945.1799.python-list@python.org>
	<V7D3e.2366$44.1509@newsread1.news.atl.earthlink.net>
	<8764z4nbv5.fsf@thomas.local>
	<8KI3e.2623$44.1361@newsread1.news.atl.earthlink.net>
	<wGJ3e.22064$C7.197@news-server.bigpond.net.au>
Message-ID: <d2o9qt$62a$04$1@news.t-online.com>

Joal Heagney wrote:

> If you're using KDE, you can set a bookmark in konqueror to the
> documentation and it'll bring it up in the bookmark toolbar. Only hassle
> is when you update python and the docs, you have to edit the bookmark.

Or you can bookmark a symlink to the documentation and bookmark that.
Another goodie are Konqueror's web shortcuts. I added one with the
URI file:/path_to_python_docs/lib/module-\{@}.html 
and the shortcut pym, and now typing e. g.

pym os.path

in the address bar immediately brings up that module's documentation.

Peter



From sean_mcilroy at yahoo.com  Sun Apr  3 03:59:27 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 2 Apr 2005 23:59:27 -0800
Subject: the bugs that try men's souls
Message-ID: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>

This needs some background so bear with me.

The problem: Suppose p is a permutation on {0...n} and t is the
transposition that switches x and y [x,y in {0...n}]. A "stepup pair"
(just a term I invented) for p is a pair (a,b) of integers in {0...n}
with a<b. A stepup pair (a,b) for p is an "inversion" (standard term)
of p iff (p(a),p(b)) is NOT a stepup pair. Now, if {a,b}={x,y}, then
clearly (a,b) is an inversion of p iff it is NOT an inversion of pt
(functional composition). Also, if {a,b} and {x,y} are disjoint, then
(a,b) is an inversion of p iff it is an inversion of pt. The remaining
cases are the ones where {a,b} and {x,y} have a single element in
common, and of these, there are exactly as many inversions of p as
there are of pt, though in general it is not the same set of stepup
pairs for each function.

The code below represents my attempt to apply python toward getting
insight into why the number of inversions, with exactly one coordinate
in {x,y}, is the same for p and pt. The problem with the code is that
if, at the relevant line ("MYSTERIOUSLY BROKEN"), I use the
commented-out expression instead of the expression that's actually
there, then in some cases the script gives a DIFFERENT ANSWER to the
question whether a given pair is or is not an inversion of p
respectively pt.

I'd sure like to know what's going wrong with this. Here's the code:


## STEPUP PAIR: AN ORDERED PAIR (x,y) OF INTEGERS WITH x<y

stepups = lambda n: n and stepups(n-1) + [[x,n] for x in range(n)] or
[]
xor = lambda x,y: (x and not y) or (y and not x)

def feedback(p,t):
    ## GIVEN A PERMUTATION f AND A STEPUP PAIR s WITH COORDINATES IN
THE RANGE OF f,
    ## SHOW THE INTEGER CASE OF THE PROPOSITION << f(s) IS A STEPUP
PAIR >>
    k = 18
    moved = [i for i in range(len(t)) if t[i]<>i]
    a, b = min(moved), max(moved)
    n = len(p) - 1
    s = stepups(n) ## MYSTERIOUSLY BROKEN: [x for x in stepups(n) if
xor(a in x,b in x)]
    print '-'*k
    print 'p: ' + str(range(n+1)) + '\n   ' + str(p)
    print '-'*k
    print 't = ' + str((a,b))
    print '-'*k
    print '%s %7s %3s' %('pair','p','pt') + '\n' + '-'*k
    for [a,b] in s:
        print '%s %5s %3s' %(str([a,b]),int([p[a],p[b]] in
s),int([p[t[a]],p[t[b]]] in s))
    print '-'*k



From tjreedy at udel.edu  Thu Apr  7 19:17:54 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 7 Apr 2005 19:17:54 -0400
Subject: curious problem with large numbers
References: <723eb693050407124816431b6a@mail.gmail.com>
Message-ID: <d34euk$9um$1@sea.gmane.org>


"Chris Fonnesbeck" <fonnesbeck at gmail.com> wrote in message 
news:723eb693050407124816431b6a at mail.gmail.com...
> However, on Windows (have tried on Mac, Linux) I get the following 
> behaviour:
>
>>>> inf = 1e10000
>>>> inf
> 1.0
>
> while I would have expected:
>
> 1.#INF

On my Windows machine with 2.2.1, I get exactly what you expected:
>>> 1e10000
1.#INF
>>> inf=1e10000
>>> inf
1.#INF

If you get wrong behavior on a later version, then a bug has been 
introduced somewhere, even perhaps in VC 7, used for 2.4.

Terry J. Reedy





From jmccall at houston.rr.com  Mon Apr 25 21:23:17 2005
From: jmccall at houston.rr.com (J. W. McCall)
Date: Tue, 26 Apr 2005 01:23:17 GMT
Subject: Quote-aware string splitting
Message-ID: <9Kgbe.24031$h6.523@tornado.texas.rr.com>

Hello,

I need to split a string as per string.strip(), but with a modification: 
I want it to recognize quoted strings and return them as one list item, 
regardless of any whitespace within the quoted string.

For example, given the string:

'spam "the life of brian" 42'

I'd want it to return:

['spam', 'the life of brian', '42']

I see no standard library function to do this, so what would be the most 
simple way to achieve this?  This should be simple, but I must be tired 
as I'm not currently able to think of an elegant way to do this.

Any ideas?

Thanks,

J. W. McCall


From stephen.thorne at gmail.com  Mon Apr 11 07:21:18 2005
From: stephen.thorne at gmail.com (Stephen Thorne)
Date: Mon, 11 Apr 2005 21:21:18 +1000
Subject: Weird...
In-Reply-To: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>
References: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>
Message-ID: <3e8ca5c805041104217802dae4@mail.gmail.com>

On Apr 11, 2005 7:57 AM, Joshua Ginsberg <listspam at flowtheory.net> wrote:
>  >>> {'a':1,'b':'2','c':[3,4]}.keys()
> ['a', 'c', 'b']
> 
> How come? :-)

Dicts are not ordered.

See note (3) on this page :
http://www.python.org/doc/current/lib/typesmapping.html

-- 
Stephen Thorne
Development Engineer


From jstroud at mbi.ucla.edu  Sun Apr  3 18:18:00 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 3 Apr 2005 14:18:00 -0800
Subject: Help me dig my way out of nested scoping
In-Reply-To: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
Message-ID: <200504031518.00267.jstroud@mbi.ucla.edu>

I wish I had time to dig into your specific problem because it looks 
interesting. But I think you might want to look at "python generators". I 
beleive there is no reason that they can't yield a function.

http://www.python.org/peps/pep-0255.html
http://docs.python.org/ref/yield.html
http://linuxgazette.net/100/pramode.html

James

On Sunday 03 April 2005 02:12 pm, Brendan wrote:
> Hi everyone
>
> I'm new to Python, so forgive me if the solution to my question should
> have been obvious.  I have a function, call it F(x), which asks for two
> other functions as arguments, say A(x) and B(x).  A and B are most
> efficiently evaluated at once, since they share much of the same math,
> ie, A, B = AB(x), but F wants to call them independantly (it's part of
> a third party library, so I can't change this behaviour easily).   My
> solution is to define a wrapper function FW(x), with two nested
> functions,  AW(x) and BW(x), which only call AB(x) if x has changed.
>
> To make this all clear, here is my (failed) attempt:
>
> #------begin code ---------
>
> from ThirdPartyLibrary import F
> from MyOtherModule import AB
>
> def FW(x):
>     lastX = None
>     aLastX = None
>     bLastX = None
>
>     def AW(x):
>         if x != lastX:
>             lastX = x
>             # ^ Here's the problem.  this doesn't actually
>             # change FW's lastX, but creates a new, local lastX
>
>             aLastX, bLastX = AB(x)
>         return aLastX
>
>     def BW(x):
>         if x != lastX:
>             lastX = x
>             # ^ Same problem
>
>             aLastX, bLastX = AB(x)
>         return bLastX
>
>     #finally, call the third party function and return its result
>     return F(AW, BW)
>
> #-------- end code ---------
>
> OK, here's my problem:  How do I best store and change lastX, A(lastX)
> and B(lastX) in FW's scope?  This seems like it should be easy, but I'm
> stuck.  Any help would be appreciated!
>
>   -Brendan
> --
> Brendan Simons

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

http://www.jamesstroud.com/


From mweihs at gmx.at  Sun Apr 10 04:56:40 2005
From: mweihs at gmx.at (Markus Weihs)
Date: Sun, 10 Apr 2005 10:56:40 +0200
Subject: Does Tk provide ComboBox ?
References: <pan.2005.04.10.07.59.15.983406@optushome.com.au>
Message-ID: <pan.2005.04.10.08.56.40.458342@gmx.at>

> Does Tkinter provide a combobox or do I have to find some way of making
> a listbox do the job ?

Hi!

In Tkinter this is called "OptionMenu".
If you don't like it, PMW (http://pmw.sourceforge.net/) has a 
*real* Combobox :)

Regards, mawe



From exarkun at divmod.com  Mon Apr 25 14:19:18 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Mon, 25 Apr 2005 18:19:18 GMT
Subject: What is situation with threads in Python
In-Reply-To: <426D2D11.3020905@jpl.nasa.gov>
Message-ID: <20050425181918.10340.702308926.divmod.quotient.24935@ohm>

On Mon, 25 Apr 2005 10:46:57 -0700, "Leonard J. Reder" <reder at jpl.nasa.gov> wrote:
>Hello Mark,
>
>I took your three day course here at JPL and recall that you said something 
>was wrong with the implementation of threads within Python
>but I cannot recall what.  So what is wrong with threads in Python?

  Nothing is wrong with threads, really.  What is often considered wrong is how well the interpreter mainloop can exploit them.  There is a single lock (the [G]lobal [I]interpreter [L]ock) which must be acquired to execute any Python bytecode.  This effectively serializes most Python programs.  Notable exceptions to this include most IO related operations (opening files, reading from sockets, etc), which explicitly release the lock during the actual IO operations, so as to allow other threads to execute Python bytecode while waiting on the disk or the network.

  Jp


From robin at SPAMREMOVEjessikat.fsnet.co.uk  Tue Apr 26 04:55:58 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Tue, 26 Apr 2005 08:55:58 +0000
Subject: regex over files
In-Reply-To: <d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk><426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
Message-ID: <426E021E.8000809@jessikat.fsnet.co.uk>

Richard Brodie wrote:
> "Robin Becker" <robin at reportlab.com> wrote in message
> news:mailman.2469.1114444689.1799.python-list at python.org...
> 
>>Gerald Klix wrote:
>>
>>>Map the file into RAM by using the mmap module.
>>>The file's contents than is availabel as a seachable string.
>>>
>>
>>that's a good idea, but I wonder if it actually saves on memory? I just tried
>>regexing through a 25Mb file and end up with 40Mb as working set (it rose
>>linearly as the loop progessed through the file). Am I actually saving anything
>>by not letting normal vm do its thing?
> 
> 
> You aren't saving memory in that sense, no. If you have any RAM spare the
> file will end up in it. However, if you are short on memory though, mmaping the
> file gives the VM the opportunity to discard pages from the file, instead of paging
> them out. Try again with a 25Gb file and watch the difference ;) YMMV.
> 
> 

:)

So we avoid dirty page writes etc etc. However, I still think I could 
get away with a small window into the file which would be more efficient.
-- 
Robin Becker


From rowen at cesmail.net  Tue Apr 26 12:38:52 2005
From: rowen at cesmail.net (Russell E. Owen)
Date: Tue, 26 Apr 2005 09:38:52 -0700
Subject: Fast plotting?
Message-ID: <rowen-608060.09385226042005@gnus01.u.washington.edu>

Can anyone recommend a fast cross-platform plotting package for 2-D 
plots?

Our situation:
We are driving an instrument that outputs data at 20Hz. Control is via 
an existing Tkinter application (which is being extended for this new 
instrument) that runs on unix, mac and windows. We wish to update 5-10 
summary plots at approximately 2 Hz and will be offering controls to 
control the instrument and the plots, preferably (but not necessarily) 
mixed in with the plots.

Ideally the package would create plots in the Tkinter application. But 
we realize we're unlikely to get the speed we need that way. So we are 
willing to have the Tkinter app send data to the plotting package  (e.g. 
via a socket) and have it display the plots in a separate process.

We started out with matplotlib, which is a wonderful package (and well 
integrated with most or all GUI toolkits). Unfortunately it is just too 
slow -- at least when driving plots integrated with the Tkinter app. (It  
is getting faster and so are computers, so at some point this will be a 
great way to go. But for now...)

Any suggestions?

-- Russell


From deetsNOSPAM at web.de  Thu Apr 21 07:15:29 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 21 Apr 2005 13:15:29 +0200
Subject: memory profiler?
References: <slrnd6dv59.j93.jtr@ofb.net> <-ISdnfAtjJdEhfrfRVn-uQ@powergate.ca>
Message-ID: <d4820g$vn$04$1@news.t-online.com>

Peter Hansen wrote:

> John Reese wrote:
>> Is there a memory or heap profiler for python programs?  So that, for
>> example, if a program was bloating over time I could see how many of
>> each object there were and maybe even where the references were?
> 
> The "gc" module has a variety of helpful features
> like that.

I created a qt-based memory analyzer on top of the gc module. I plan to
release it soon - it has been helpful to me for a few projects. Its a
client-server application that collects data through an in-process running
thread that delivers object histograms. The client fetches these and allows
to display the development of objects based various criteria over the time.
It can also record these data for offline-analysis. So far the in-proccess
threads communicate their histograms either by pyro or xmlrpc servers.  

Unfortunately debugging ZOPE with the xmlrpc server lead to a mem-leak
itself :( - so currently I'm no confident enough to release it. 
-- 
Regards,

Diez B. Roggisch


From http  Sun Apr  3 07:34:44 2005
From: http (Paul Rubin)
Date: 03 Apr 2005 04:34:44 -0700
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07>
Message-ID: <7x3bu8t7or.fsf@ruckus.brouhaha.com>

"Raymond Hettinger" <vze4rx4y at verizon.net> writes:
> When writing a large suite, you quick come to appreciate being able
> to use assert statements with regular comparision operators, debugging
> with normal print statements, and not writing self.assertEqual over and
> over again.  The generative tests are especially nice.

But assert statements vanish when you turn on the optimizer.  If
you're going to run your application with the optimizer turned on, I
certainly hope you run your regression tests with the optimizer on.


From Scott.Daniels at Acm.Org  Wed Apr  6 11:35:10 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 06 Apr 2005 08:35:10 -0700
Subject: Does IronPython indicate MS interest in dynamic languages?
In-Reply-To: <42539aa9.438452150@news.oz.net>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
	<mailman.1408.1112743462.1799.python-list@python.org>
	<fnqbi2-p9c.ln1@lairds.us>
	<yIadneprl6oqxc7fRVn-gw@wideopenwest.com>
	<42539aa9.438452150@news.oz.net>
Message-ID: <4253fc60$1@nntp0.pdx.net>

Bengt Richter wrote:
> If there is to be an MSPython, how long 'til Mozilla FirePython? ;-)
> 

Mexico has already designed the flag for that, I think.

--Scott David Daniels
Scott.Daniels at Acm.Org


From steven.bethard at gmail.com  Sat Apr 23 16:47:25 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 23 Apr 2005 14:47:25 -0600
Subject: func_code vs. string problem
In-Reply-To: <d4easv$rgm$1@nemesis.news.tpi.pl>
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
	<d4easv$rgm$1@nemesis.news.tpi.pl>
Message-ID: <QvKdnZAEj5TEKfffRVn-oQ@comcast.com>

Filip Dreger wrote:
> I am trying to find a way of executing functions without creating a 
> nested scope, so they can share local and global namespace (even if 
> they are declared in some other module).

Why?  Can you explain what the use case is?

STeVe


From ajikoe at gmail.com  Mon Apr 11 01:32:11 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 10 Apr 2005 22:32:11 -0700
Subject: database in python ?
Message-ID: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>

Hello I need to build table which need searching data which needs more
power then dictionary or list in python, can anyone help me what kind
of database suitable for python light and easy to learn. Is mySQL a
nice start with python ?

Sincerely Yours,
Pujo



From ksenia.marasanova at gmail.com  Wed Apr 13 16:24:50 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Wed, 13 Apr 2005 22:24:50 +0200
Subject: templating system
In-Reply-To: <b273c7410504122057339bf28b@mail.gmail.com>
References: <130df19305041008552621549c@mail.gmail.com>
	<b273c7410504122057339bf28b@mail.gmail.com>
Message-ID: <130df1930504131324550fa74@mail.gmail.com>

On 4/13/05, James Carroll <mrmaple at gmail.com> wrote:
> I've had fantastic results with SimpleTAL
>     http://www.owlfish.com/software/simpleTAL/
> 
> It uses the Zope Page Templates style markups (which are wysiwyg in
> dreamweaver) and then pulls contents from python functions and
> 'contexts' very nicely.  Your example would look something like:
> 
> <ul>
> <span tal:repeat="record records()">
>    <li><A href="www.yahoo.com" tal:attribute="href
> string:http://imdb.com?search=${record/title}"
> tal:content=record/title>record title goes here</A>
> </span>

ZPT looks nice, but it can't produce non-markup text, right? 
Besides that, I find it hard to read... it is kind of extra mental
step to translate "repeat="record records" into "for record in
records" :) But it is matter of taste of course.

-- 
Ksenia


From fabio.pliger at siavr.it  Tue Apr 12 11:13:46 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Tue, 12 Apr 2005 15:13:46 GMT
Subject: chaco and wx 2.5....
Message-ID: <KAR6e.60706$zZ1.1721966@twister1.libero.it>

anyone know if it's possibile to run chaco with wx 2.5.3 or grater?




From nid_oizo at yahoo.com_removethe_  Tue Apr 26 00:08:07 2005
From: nid_oizo at yahoo.com_removethe_ (Nicolas Fleury)
Date: Tue, 26 Apr 2005 00:08:07 -0400
Subject: Pythonic way to do static local variables?
In-Reply-To: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <96jbe.9413$oy2.458651@weber.videotron.net>

Charles Krug wrote:
> I've a function that needs to maintain an ordered sequence between
> calls.
> 
> In C or C++, I'd declare the pointer (or collection object) static at
> the function scope.
> 
> What's the Pythonic way to do this?
> 
> Is there a better solution than putting the sequence at module scope?
> 
> Thanks.

You might want a generator.  Search for yield keyword.
Regards,
Nicolas


From fredrik at pythonware.com  Fri Apr 22 09:51:08 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 15:51:08 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com><EFj8e.809$E57.495@fe51.usenetserver.com><pan.2005.04.20.10.08.25.97524@gmail.com><f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA><pan.2005.04.22.11.48.13.138980@gmail.com><pan.2005.04.22.13.22.14.591804@gmail.com>
	<pan.2005.04.22.13.41.45.76963@gmail.com>
Message-ID: <d4av7l$ol8$1@sea.gmane.org>

Willem Ligtenberg wrote:

> By the way, I know about findall, but when I iterate thruogh it like:
> for x in function:
> print 'function', x
> 
> I get:
> function <Element 'Prot-ref_name_E' at 0xb7d10cf8>
> function <Element 'Prot-ref_name_E' at 0xb7d10d10>
> 
> But ofcourse I want the information in there...

    for x in function:
        print 'function', x.text

</F>



From sjmachin at lexicon.net  Tue Apr 12 18:37:09 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 13 Apr 2005 08:37:09 +1000
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<1113340181.174797.132250@f14g2000cwb.googlegroups.com>
Message-ID: <u9io519uc5upv93l6sd8ssddbhdi50a41f@4ax.com>

On 12 Apr 2005 15:06:30 -0700, "runes" <rune.strand at gmail.com> wrote:

>Luckily I found this regex howto:
>http://www.amk.ca/python/howto/regex/ and that helped a lot. 

Luckily??? AMK's howto is pointed to by the 3rd paragraph of Section
4.2.1 of the documentation that you are dissing:

"""
A brief explanation of the format of regular expressions follows. For
further information and a gentler presentation, consult the Regular
Expression HOWTO, accessible from http://www.python.org/doc/howto/. 
"""

>In
>addition, Mr. Magnus Lie Hetland coincidentally  posted a question on
>this list that got answers that helped me out.
>(http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/734cdb90078d5298/fc4c56ca66231d7f?q=Hetland&rnum=2#fc4c56ca66231d7f)

The answers (paraphrased) were "read the [Xah-Lee-word]ing manual".
I'm glad that you RTFMed, and that it helped you. You should do so
more often.





From benmarkwell at gmail.com  Fri Apr  1 22:51:12 2005
From: benmarkwell at gmail.com (Ben)
Date: 1 Apr 2005 19:51:12 -0800
Subject: New to programming question
In-Reply-To: <0_63e.19914$C7.11056@news-server.bigpond.net.au>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<0_63e.19914$C7.11056@news-server.bigpond.net.au>
Message-ID: <1112413872.206600.215630@f14g2000cwb.googlegroups.com>

Thanks for your help.  

It is much appreciated.



From m.barenco at gmail.com  Mon Apr 11 10:17:46 2005
From: m.barenco at gmail.com (martino)
Date: 11 Apr 2005 07:17:46 -0700
Subject: where is python.h? / NumPy installation
Message-ID: <1ba41a18.0504110617.3746a6d2@posting.google.com>

Hi, I am trying to install NumPy (v23.8) onder Macosx (panther
version). Python (v2.3) is bundled into panther and I installed the
IDE on top of that. After having untarred the source distribution in
the desktop directory and typed

>python setup.py install

as recommended in the attached documentation, I get:

running install
running build
running build_py
running build_ext
building '_numpy' extension
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp
-mno-fused-madd -fno-common -dynamic -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I/System/Library/Frameworks/vecLib.framework/Headers
-IInclude -IPackages/FFT/Include -IPackages/RNG/Include
-I/System/Library/Frameworks/Python.framework/Versions/2.3/include/python2.3
-c Src/arrayobject.c -o
build/temp.darwin-7.8.0-Power_Macintosh-2.3/Src/arrayobject.o
Src/arrayobject.c:18:20: Python.h: No such file or directory
In file included from Src/arrayobject.c:26:
Include/Numeric/arrayobject.h:24: parse error before '*' token
Include/Numeric/arrayobject.h:24: warning: type defaults to `int' in
declaration of `PyArray_GetItemFunc'
Include/Numeric/arrayobject.h:24: warning: data definition has no type
or storage class
Include/Numeric/arrayobject.h:25: parse error before '*' token
Include/Numeric/arrayobject.h:25: warning: function declaration isn't
a prototype

+ zilions of error messages that probably stem from this first error
(i.e. not finding this Python.h file). Now I have looked everywhere
else on the hard drive and Python.h is nowhere to be seen. Should I
install something else before attempting to install NumPy (but what?).
Thanks a lot.

Martino


From zarnovican at pobox.sk  Wed Apr  6 07:41:13 2005
From: zarnovican at pobox.sk (Brano Zarnovican)
Date: 6 Apr 2005 04:41:13 -0700
Subject: ignoring keywords on func. call
Message-ID: <1112787673.095411.266170@o13g2000cwo.googlegroups.com>

Hi !

If I define 'f' like this

def f(a):
  print a

then, the call with keywords

f(1, optional=2)

fails. I have to change 'f' to

def f(a, **kwrds):
  print a

to ignore optional parameters.

BUT..

Q: Can you call 'f' with keywords that will be
  ignored, without changing 'f's definition ?

I would like to avoid code like this:
k = {}
k['optional'] = 2
try:
  f(1, **k)
except TypeError:
  f(1)

Also, the problem is that I don't know if the TypeError
was caused by calling 'f' with keywords or somewhere
"inside" f.

You can also say that I need to specify optional parameters
on caller side (not called side).

BranoZ



From richie at entrian.com  Tue Apr 12 07:10:18 2005
From: richie at entrian.com (Richie Hindle)
Date: Tue, 12 Apr 2005 12:10:18 +0100
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <8qan515t9sedgbp954fj85jvu0tc2171ec@4ax.com>


[Xah]
> motherfucking ... fucking ... fucking ... fucking ... fuck ... fucking
> fucking ... fucking ... mother fucking ... fucking ... piece of shit ...
> motherfucking ... fucking ... fucking ... big asshole ... masturbation ...
> Fucking morons ... fucking stupid ... fuckhead coders ... fuckheads ...
> you fucking asses.

> paypal me a hundred dollars and i'll rewrite the whole re doc in a few
> hours.

Can we paypal you a hundred dollars to leave us alone?  I'll pledge $10.
Are there another nine people here who'll do the same?

-- 
Richie Hindle
richie at entrian.com



From flupke at nonexistingdomain.com  Sat Apr  9 10:28:26 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Sat, 09 Apr 2005 14:28:26 GMT
Subject: workaround for generating gui tools
Message-ID: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>

Hi,

i create my GUIs mainly via wxGlade. However when you start of to 
program and want to do some rearranging to the gui, wxglade overwrites 
your file and you've got to put your own code back in.

I think i can work around that (at least a bit) by making a second file 
that imports the gui generated by wxglade and make classes that extend 
the original ones.
For instance i could have a class MainForm that extends the wxFrame 
class that wxGlade produces.

Are there other clever ways to work around this problem?

Thanks,
Benedict


From darkbard at extending-php.net  Mon Apr  4 11:32:12 2005
From: darkbard at extending-php.net (Gabriele *Darkbard* Farina)
Date: Mon, 04 Apr 2005 15:32:12 GMT
Subject: Extracting Font Outline informations
Message-ID: <06d4e.1168960$35.43275286@news4.tin.it>

Hi,

there is a Python library that makes me able to extract outline 
informations from font files? I'd like to manage TrueType and FreeType 
fonts ...

I searched for som wrappers, but I didn't find anything ...

bye


From google at almico.com  Tue Apr  5 19:32:28 2005
From: google at almico.com (Almico)
Date: 5 Apr 2005 16:32:28 -0700
Subject: (win32) speedfan api control
References: <Kln3e.13905$e06.7165@twister.socal.rr.com>
	<3b8m2tF6enbpaU1@individual.net>
Message-ID: <b3a3df2d.0504051532.15e882d4@posting.google.com>

"Claudio Grondi" <claudio.grondi at freenet.de> wrote in message news:<3b8m2tF6enbpaU1 at individual.net>...
> your script works ok on my W2K box :-).
> 
> It makes me curious if I can get also the
> temperatures into Python script for
> further processing as easy as the setting
> of the checkbox is done? (I have not
> much experience with this kind of
> programming yet)
> May I ask how did you get the
> "TJvXPCheckbox" and the other
> values necessary to access the program
> GUI ? (as I can see, there is no source
> code of SpeedFan available) ?

SpeedFan publishes a Shared Memory area. Drop SpeedFan's author (me
:-)) an email to get its specs.


From peter at engcorp.com  Mon Apr 25 12:51:43 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 25 Apr 2005 12:51:43 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
Message-ID: <uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>

Dennis Lee Bieber wrote:
> On Mon, 25 Apr 2005 17:24:36 +0300, Christos "TZOTZIOY" Georgiou:
>>I don't know any related myth of anglo-saxon origin to quote.
> 
> 	The most commonly known phrasing would likely be "God only helps
> those who help themselves".

Google suggests that removing the word "only" produces a
phrase many times more commonly known...

-Peter


From stevenaleach at mac.com  Thu Apr 28 10:40:30 2005
From: stevenaleach at mac.com (steve.leach)
Date: Thu, 28 Apr 2005 10:40:30 -0400
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
Message-ID: <d4qsmj$5gr$1@domitilla.aioe.org>

> python -o foo.exe foo.py
> 
> at the command line, and get an executable, without any further effort.

Hence making the resulting program useless to users of most operating 
systems.


From tiissa at free.fr  Thu Apr 21 04:39:25 2005
From: tiissa at free.fr (tiissa)
Date: 21 Apr 2005 01:39:25 -0700
Subject: inner sublist positions ?
References: <9468aec7.0504201354.7e6d84cf@posting.google.com>
Message-ID: <1114072765.696308.321340@l41g2000cwc.googlegroups.com>

Bernard A. wrote:
> maybe have you some better / faster ideas / implementations ? or even
> a more pythonic to help me learning that

You may want to look at string matches algorithm (a good review: [1]).
In particular there are classics like Boyer-Moore and some involving
minimal automatons similar to your regular expression ideas.

[1] http://www-igm.univ-mlv.fr/~lecroq/string/index.html



From skip at pobox.com  Tue Apr 19 13:56:46 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 19 Apr 2005 12:56:46 -0500
Subject: XML-RPC -- send file
In-Reply-To: <1113930209.259905.112850@o13g2000cwo.googlegroups.com>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
	<1113930209.259905.112850@o13g2000cwo.googlegroups.com>
Message-ID: <16997.18014.62862.616747@montanaro.dyndns.org>


    codecraig> how would I decode it?

Assuming you have Python at the other end and you get a Binary object
instead of a string, access its data attribute.  OTOH, xmlrpclib may
automatically decode the wrapper object for you.

In any case, I have two further recommendations:

    * Check the xmlrpclib docs.

    * Experiment.  Electrons are hardy fellows and hardly ever break at the
      energy levels present in modern computers.

Skip


From stewart.midwinter at gmail.com  Mon Apr  4 21:06:00 2005
From: stewart.midwinter at gmail.com (Stewart Midwinter)
Date: Mon, 4 Apr 2005 19:06:00 -0600
Subject: Python modules for image / map manipulation?
Message-ID: <d4c0d48005040418069d4ea65@mail.gmail.com>

I would like to do some image / map manipulation with Python. 

I've got a very large map file in .png format. My thought is to chop
it up into small tiles using some method.  What Python module would be
helpful for this?

Next, when I obtain the start and end co-ordinates of a user's trip,
I'd like to stitch together the approriate tiles and present the
images that show the terrain the user has travelled over.

Lastly, I'd like to plot the GPS tracklog of the trip on top of the map. 

Any suggestions for modules or projects to help accomplish this?  It's
a non-commercial hobby application.

thanks, 
-- 
Stewart Midwinter
stewart at midwinter.ca
stewart.midwinter at gmail.com
Skype: midtoad


From radam2 at tampabay.rr.com  Fri Apr  1 20:40:56 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 01:40:56 GMT
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<it7r41dco1e2mejfl1ibgjh6ses3d04baa@4ax.com>
	<pan.2005.04.01.21.46.13.894882@jerf.org>
Message-ID: <viqr419fk7msg8gqf1pvv12dm8amv1jh5h@4ax.com>

On Fri, 01 Apr 2005 16:46:14 -0500, Jeremy Bowers <jerf at jerf.org>
wrote:

>On Fri, 01 Apr 2005 19:56:55 +0000, Ron_Adam wrote:
>
>> On Fri, 01 Apr 2005 13:47:06 -0500, Jeremy Bowers <jerf at jerf.org>
>> wrote:
>>>Is this an April Fools gag? If so, it's not a very good one as it's quite
>>>in line with the sort of question I've seen many times before. "I have
>>>a hammer, how do I use it to inflate my tire?"
>> 
>> Not an April fools gag, I'm just new to decorators and google brings
>> up lots of discussions from the past on how they may be implemented in
>> the future, but not much in actually how they work or how to use them.
>
>OK, just checking :-)
>
>A decorator is completely equivalent in principle to
>
>def function():
>	pass
>function = decorator(function)

This helped some.  Thanks.

>That's a simplified form; decorators can themselves be an expression which
>returns a callable that can be applied to a function and the rule for
>applying several in sequence work as you'd expect (pipelining earlier
>results into later ones, making for a great Obfuscated Python entry or
>two based on the "function name misdirection" trick), but this simplified
>form captures the essense, which is what I think you're looking for. In
>particular, it's just "syntax sugar", not a "special feature".

Are you sure?  There appears to be some magic involved with these,
things happening under the hood with argument passing.  

def decorate(function):
    def wrapper(args):
        print 'args' = args
        return function(args)
    return wrapper

@decorate
def func(s):
    print s

func('hello')

In this example, how does wrapper get the correct arguments? This
leads me to believe what I'm looking for is possible, yet in this case
there isn't any way to pass, new arguments to the wrapper without
loosing the original ones.

Wait a min, hold the phone.. Eureka!  :)  I just figured how to do it.

(after trying it in idle)

def append_arg(n_args):
    def get_function(function):
        def wrapper(args):
            return function(args+'-'+n_args)
        return wrapper
    return get_function

@append_arg('goodbye')
def func(s):
    print s

func('hello')

prints:

hello-goodbye

Ok, this isn't a very useful example, but it demonstrates something
important. That, there seems to be a stack involved in the argument
passing of nested defined functions.  Any arguments passed in the
decorators get puts on top of the stack. And nested functions pull
them back off.  Does this sound right?

I still feel it can be simplified a bit. These aren't easy to
understand, and having to nest functions like this adds to the
confusion. possibly being able to get the argument "stack", as it
appears to be, directly in the first level could make things a lot
easier.


>
>Feeling-like-I-owed-you-an-answer-after-the-april-fool-accusation-ly yrs,
>Jeremy Bowers
>:-)

Thanks, it helped. :)


From merkosh at hadiko.de  Sun Apr 17 11:29:49 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Sun, 17 Apr 2005 17:29:49 +0200
Subject: sscanf needed
Message-ID: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>

Hi,

I've got a ISO 8601 formatted date-time string which I need to read into a
datetime object.
Is there a shorter way than using regular expressions? Is there a sscanf
function as in C?

Thanks,
Uwe     


From pinard at iro.umontreal.ca  Mon Apr 18 18:32:17 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Mon, 18 Apr 2005 18:32:17 -0400
Subject: def a((b,c,d),e):
In-Reply-To: <d41ao3$ir$04$1@news.t-online.com>
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
Message-ID: <20050418223217.GA3283@alcyon.progiciels-bpi.ca>

[Diez B. Roggisch]
> AdSR wrote:

> > It appears that you can specify a function explicitly to take
> > n-tuples as arguments. [...] Has anyone actually used it in real
> > code?

I do not use it often in practice, but sometimes, yes.  If the feature
was not there, it would be easy to do an explicit tuple unpacking from
the argument at the start of the function.  It allows me to spare
inventing a name for the compound formal argument. :-)

> [...] as a limited form of pattern-matching [...]

In one application, written long ago, I had a flurry of functions
kept in a list, which were tried in turn until the call does not
raise an Exception, so indicating a match.  Since then, I used other
means, first hoping to save at least the time it takes for creating a
traceback object (but I did not time it), and later trying to get a
better-than-linear time while trying to find the correct function.

I never considered the feature to be atrocious.  Implicit tuple
unpacking occurs in a few places in Python already, it is only elegant
that it also occurs while functions receive their argument.  The most
useful place for implicit tuple unpacking, in my experience, is likely
at the left of the `in' keyword in `for' statements (and it is even
nicer when one avoids extraneous parentheses).

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From aisaac0 at verizon.net  Sat Apr 30 00:04:43 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Sat, 30 Apr 2005 04:04:43 GMT
Subject: mbx repair script
References: <gMUbe.2502$iZ1.2213@trnddc03>
	<donn-0E4BE4.09145528042005@gnus01.u.washington.edu>
Message-ID: <vtDce.362$6q1.123@trnddc09>


"Donn Cave" <donn at u.washington.edu> wrote in message
news:donn-0E4BE4.09145528042005 at gnus01.u.washington.edu...
> All mbx files start with a 2048 byte
> header, and a valid header can be copied to another
> file and still be valid.  For example, if the damaged
> file still has 2048 bytes of header,
>
>    1.  Find or create another mbx file "spud".
>    2.  Copy header:    $ dd if=spud count=4 > newbx
>    3.  Copy old file:  $ dd if=oldbx skip=4 >> newbx
>    4.  change ownership and permission to match oldbx.


This did not work for me.
Should it?
I thought the header contained information tightly tied
to the rest of the content (to speed search etc) so that
e.g., byte counts could matter.

Can you point me to documentation of the mbx format?

Thanks,
Alan Isaac




From magoldfish at gmail.com  Fri Apr 15 10:41:14 2005
From: magoldfish at gmail.com (Marcus Goldfish)
Date: Fri, 15 Apr 2005 10:41:14 -0400
Subject: pythonic use of properties?
In-Reply-To: <d3nf2n$fm5$1@sea.gmane.org>
References: <5e183f3d05041420053ecd0ee@mail.gmail.com>
	<d3nf2n$fm5$1@sea.gmane.org>
Message-ID: <5e183f3d05041507417d3fa81d@mail.gmail.com>

On 4/15/05, Michael Spencer <mahs at telcopartners.com> wrote:
> > class SillyDecimal(object):
> >    """A silly class to represent an integer from 0 - 99."""
> >    def __init__(self, arg=17):
> >        if isinstance(arg, tuple):
> >            self.tens = arg[0]
> >            self.ones = arg[1]
> It is conventional to indicate 'private' attributes with the _ prefix.
Well, I actually want to expose tens and ones, which is why they are
not private.

> By this standard, you have three 'public' interfaces: number, get/setNumber and
> ones/tens, which is confusing and error-prone.  Moreover, if you are going to
> validate number, it might make more sense to put all the validation logic into
> the setter vs. splitting some into __init__.  So your class could look like:
Of course the toy example would be better coded by changing the
internal representation to number (instead of tens and ones), but then
the point about property validation is lost, as you demonstrate in
your example.

> As for whether it is appropriate to validate the value at all, I think that
> depends on your larger design.
So what do you consider when making this decision, and do these
factors differ between python and C#/Java?

Marcus


From bj_666 at gmx.net  Sat Apr 30 16:33:55 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 30 Apr 2005 22:33:55 +0200
Subject: Directory in Windows
References: <1114882248.306624.199600@o13g2000cwo.googlegroups.com>
	<4273c141_1@newspeer2.tds.net>
	<1114885529.537692.178620@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.04.30.20.33.53.689875@gmx.net>

In <1114885529.537692.178620 at l41g2000cwc.googlegroups.com>, custard_pie
wrote:

> Here's my code
> ========================================================
> filelist={}
> def listFiles(self, dirName, filesInDir):
> 	for fname in filesInDir:
> 		if os.path.isfile(fname):

`fname` contains just the file name without the path to the file.  So this
gives `False` for every file name except if there's a file with the same
name in the current working directory.

> 			key = os.path.join(dirName, fname)
> 			stats = os.stat(fname)

Same problem with `stat()`.  Move the assignment to `key` up and use that
to check with `isfile()`/`isdir()` and `stat()`.

> 			filelist[key] = (stats[stat.ST_MTIME], stats[stat.ST_SIZE])
> os.path.walk(string.strip(self.path.get()), listFiles, None)
> print filelist
> =======================================================

Ciao,
	Marc 'BlackJack' Rintsch


From ajikoe at gmail.com  Thu Apr 21 16:41:39 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 21 Apr 2005 13:41:39 -0700
Subject: __del__ and reference count problem
In-Reply-To: <4267f1e0$0$8871$636a15ce@news.free.fr>
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>
	<1114107504.036833.109360@z14g2000cwz.googlegroups.com>
	<4267f1e0$0$8871$636a15ce@news.free.fr>
Message-ID: <1114116099.446355.13610@z14g2000cwz.googlegroups.com>

look at this discussion:
http://www.dbforums.com/archive/index.php/t-1100372.html

it looks like we have to use other way, hold the data we want to
preseve in an object, because it is possible the class is removed
before the instance cleaned, and we can not expect __del__ 100% in
handling finalizing process.

Pujo



From martin.witte at gmail.com  Wed Apr  6 15:21:28 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 6 Apr 2005 12:21:28 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
Message-ID: <1112815288.465004.74840@z14g2000cwz.googlegroups.com>

For me it works fine. It seems that for you stdout is not flushed
correctly in your terminal. What kind of terminal are you writing to?



From ryan at ryankaskel.com  Tue Apr 26 22:32:38 2005
From: ryan at ryankaskel.com (ryan at ryankaskel.com)
Date: 26 Apr 2005 19:32:38 -0700
Subject: Can .py be complied?
In-Reply-To: <d4mq31$gq3$1@domitilla.aioe.org>
References: <426ec8f7_2@rain.i-cable.com><d4mq31$gq3$1@domitilla.aioe.org>
Message-ID: <1114569158.396231.45460@z14g2000cwz.googlegroups.com>

I don't know the exact details, but try using the compiled Python
scripts (bytecode). I believe they are semi-optimized and platform
independent. They are the .pyc and .pyo files generated when the script
is run.



From smokerdude66 at myway.com  Fri Apr 29 09:59:22 2005
From: smokerdude66 at myway.com (MC05)
Date: Fri, 29 Apr 2005 06:59:22 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
Message-ID: <3desu2F6qoj7aU1@individual.net>


"sheltech" <quasara at earthlink.net> wrote in message 
news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
>
> "MC05" <smokerdude66 at myway.com> wrote in message
> news:3dc8hjF6s5i2uU1 at individual.net...
>>
>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>> >
>> > 4) I doubt seriously whether God plays a guitar, since guitars are made
> by
>> > men, for men.  His Son could theoretically play a guitar.  Perhaps He
>> > does. Perhaps He doesn't.  Only the Father and His Holy Angels know.
>>
>> So then Lucifer was a wicked bass player whose sex and drugs and rock n
> roll
>> alientated the rest of the band and was fired?
>>
>>
>>
>
> "Fired" ....  good one

Heh.  Can't take credit for an accident.  Your eye is better than mine. :)
>
>
> 




From markus_GETRIDOFALLCAPSwankus at hotmail.com  Tue Apr  5 09:01:30 2005
From: markus_GETRIDOFALLCAPSwankus at hotmail.com (Markus Wankus)
Date: Tue, 05 Apr 2005 09:01:30 -0400
Subject: Python IDE like NetBeans/Delphi IDE
In-Reply-To: <2ZadnddAcaxOFc_fRVn-ig@comcast.com>
References: <mailman.1376.1112702768.1799.python-list@python.org>
	<2ZadnddAcaxOFc_fRVn-ig@comcast.com>
Message-ID: <5%v4e.4357$6k4.443808@news20.bellglobal.com>

More specifically, check out the pydev plugin for Eclipse.

pydev.sourceforge.net

M.

Larry Bates wrote:
> Take a look at ActiveState:
> 
> http://www.activestate.com/Products/ActivePythonFamily/?_x=1
> 
> or for something more general:
> 
> http://www.eclipse.org/
> 
> Larry Bates
> 
> 
> fowlertrainer at anonym.hu wrote:
> 
>>Hi !
>>
>>I search for an IDE that working in Windows, and knows these functions:
>>
>>A.) Automatic name searching/showing/extending on classes with
>>keypressing (like Netbeans, or Delphi Ctrl+Space).
>>B.) Debugging: breakpoints, step on lines (code), watch variables.
>>
>>Or A and B both.
>>
>>Please help me.
>>
>>Thanx:
>>ft
>>


From ladasky at my-deja.com  Wed Apr  6 07:34:25 2005
From: ladasky at my-deja.com (ladasky at my-deja.com)
Date: 6 Apr 2005 04:34:25 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <mailman.1305.1112633442.1799.python-list@python.org>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
	<mailman.1305.1112633442.1799.python-list@python.org>
Message-ID: <1112787265.022988.205630@z14g2000cwz.googlegroups.com>

Michael Spencer wrote:
> ladasky at my-deja.com wrote:
[snip]
> > Anyway, my present problem is that I want to make copies of
instances
> > of my own custom classes.  I'm having a little trouble
understanding
> > the process.  Not that I think that it matters -- but in case it
does,
> > I'll tell you that I'm running Python 2.3.4 on a Win32 machine.
[snip]
> If you google for:
>   python __deepcopy__ cookbook
> you will find a couple of examples of this method in use, among them:

> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259179
>
>  1  class deque(object):
>  2
>  3      def __init__(self, iterable=()):
>  4          if not hasattr(self, 'data'):
>  5              self.left = self.right = 0
>  6              self.data = {}
>  7          self.extend(iterable)
>
> [...snip methods...]
>
>  8    def __deepcopy__(self, memo={}):
>  9        from copy import deepcopy
> 10        result = self.__class__()
> 11        memo[id(self)] = result
> 12        result.__init__(deepcopy(tuple(self), memo))
> 13        return result
>
> HTH
> Michael

Hi, Michael,

I was indeed finding code like this in my web searches, though not this
particular example.  I'm glad that you cut out code that is irrelevant
to the deepcopy operation.  Still, I want to understand what is going
on here, and I don't.  I've numbered the lines in your example.

So, entering deepcopy, I encounter the first new concept (for me) on
line 10.  We obtain the class/type of self.  On line 11 we create a
dictionary item in memo, [id(self):type(self)].  So now I'm confused as
to the purpose of memo.  Why should it contain the ID of the *original*
object?

Things get even stranger for me on line 12.  Working from the inside of
the parentheses outward, an attempt is made to convert self to a tuple.
 Shouldn't this generate a TypeError when given a complex, non-iterable
item like the deque class?  I just tried running one of my programs,
which assigns the name "x" to one of my custom objects, and when I
execute tuple(x), a TypeError is what I get.

Anyway, I like what I think I see when you finally call __init__ for
the copied object, on lines 4-6.  If __deepcopy__ calls __init__, then
the new deque object should already have a "data" attribute.  So "data"
is only initialized if it doesn't already exist.

I do not understand whether the "iterable" variable, which appears on
lines 3 and 7, is relevant to the copying operation.  Line 12 calls
__init__ with a single argument, not two, so iterable should be
declared as an empty tuple.  Again I see what I think should generate a
TypeError on line 7, when an attempt is made to extend the non-sequence
object "self" with the iterable tuple.

Is there another section of the Python docs that will clarify all this
for me?  I got hung up on all the "static", "public", etc. declarations
in Java early on.  Python has taken me an awful lot farther, but
perhaps I'm hitting the conceptual wall again.

--
Rainforest laid low.
"Wake up and smell the ozone,"
Says man with chainsaw.
John J. Ladasky Jr., Ph.D.



From bokr at oz.net  Thu Apr 21 14:01:10 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 21 Apr 2005 18:01:10 GMT
Subject: Python instances
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
	<d450ub$2kp$1@news.web.de>
	<1113983093.813565.23430@l41g2000cwc.googlegroups.com>
	<426647ea$1_3@newspeer2.tds.net> <426776fa.134053138@news.oz.net>
	<4267910f$1_3@newspeer2.tds.net>
Message-ID: <4267e784.162863875@news.oz.net>

On Thu, 21 Apr 2005 07:58:14 -0400, Kent Johnson <kent37 at tds.net> wrote:

>Bengt Richter wrote:
>> The following shows nothing static anywhere, yet a class has been defined, an instance created, and
>> __init__ called with initial value, and the value retrieved as an attribute of the returned instance,
>> and it's all an expression.
>> 
>>  >>> type('C', (), {'__init__': lambda self,v:setattr(self,'foo',v)})('hello').foo
>>  'hello'
>
>I have no idea what point you are trying to make, except maybe that it is possible to obfuscate a 
>simple class definition.
>
I may have misunderstood your point ;-) I was just trying to add an exclamation point.
I.e., everything happening above shows that you don't need to have a name bound to the class
as in class C:pass, nor do you need to "put" and instance "somewhere", as in in inst = C('hello'),
and you don't need to do that to get inst.foo from all of the preceding. I.e., whatever the OP
thinks about assigning/binding, it's not an absolutely necessary part of any of the preceding.

Regards,
Bengt Richter


From rkern at ucsd.edu  Sat Apr 30 18:00:36 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sat, 30 Apr 2005 15:00:36 -0700
Subject: Numeric/Numarray equivalent to zip ?
In-Reply-To: <1114849922.518669.105590@l41g2000cwc.googlegroups.com>
References: <1114849922.518669.105590@l41g2000cwc.googlegroups.com>
Message-ID: <d50ur0$r3k$1@sea.gmane.org>

George Sakkis wrote:
> What's the fastest and most elegant equivalent of zip() in
> Numeric/Numarray between two equally sized 1D arrays ? That is, how to
> combine two (N,)-shaped arrays to one (N,2) (or (2,N)) shaped ? I
> expect the fastest and the most elegant idiom to be identical, as it is
> usually the case in this excellent library, but if not, both would be
> useful to know. Thanks,

Look at combining concatenate(), reshape(), and transpose(). In Scipy, I 
would use hstack() and vstack().

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From fredrik at pythonware.com  Sun Apr 24 11:49:43 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 17:49:43 +0200
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<1114357137.234806.141920@z14g2000cwz.googlegroups.com>
Message-ID: <d4gess$ov7$1@sea.gmane.org>

"ajikoe at gmail.com" wrote:

> when you use a = a + 'world'  python sees it as an error because of
> different type.
>
> But when you use a += 'world'
> python will change the right into list (because a is a list).

"changing into a list" is a bit misleadning; to bit a bit more precise,
you may want to change that to

    python will treat the right as a sequence

</F>





From dbickett at gmail.com  Sun Apr 10 00:46:04 2005
From: dbickett at gmail.com (Daniel Bickett)
Date: Sun, 10 Apr 2005 00:46:04 -0400
Subject: very simple tkinter demo program
In-Reply-To: <aQX5e.1205416$35.44366592@news4.tin.it>
References: <aQX5e.1205416$35.44366592@news4.tin.it>
Message-ID: <1d6cdae3050409214657844151@mail.gmail.com>

max(01)* wrote:
> 
> i also used try-except for checking for invalid files.
> 
[...]
> 
> i'd like to hear your suggestions and comments for improving it.

Without actually reading your code, if I may, I would suggest using
the os module to confirm that a file exists rather than waiting for an
error to be thrown.

>>> userSuppliedPath = "/this/path/does/not/exist/"
>>> import os.path
>>> if not os.path.isfile( userSuppliedPath ):
	# this has the twofold purpose of:
	# 1) making sure the path exists, and
	# 2) making sure the path is a file
	print "Error!"

	
Error!
>>> 

-- 
Daniel Bickett
dbickett at gmail.com
http://heureusement.org/


From mwm at mired.org  Thu Apr 14 02:42:38 2005
From: mwm at mired.org (Mike Meyer)
Date: Thu, 14 Apr 2005 01:42:38 -0500
Subject: Using a python web client behind a proxy (urllib and
 twisted.web)
References: <d3jiid$lne$1@azure.qinip.net>
Message-ID: <8664ypvoyp.fsf@guru.mired.org>

Matthijs <newsclient at high.speedlinq.nl> writes:

> I have been trying to make a script that will download several rss
> feeds to my computer. The only problem I have is that I have to go
> through a proxy.
>
> First I tried using urllib (python 2.4, win32) but I found that the
> http_proxy and no_proxy code were not implemented for win32. I have
> made changes to urllib and urllib2 so that they use the proxy set in
> either the windows registry or in an environment variable.
>
> Question: How can I get this code added to the python distribution?

submit a patch to <URL: http://sourceforge.net/tracker/?group_id=5470 >.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From jeffelkins at earthlink.net  Sat Apr 23 17:45:34 2005
From: jeffelkins at earthlink.net (jeff elkins)
Date: Sat, 23 Apr 2005 21:45:34 +0000
Subject: GUI woes
Message-ID: <200504232145.34377.jeffelkins@earthlink.net>

Howdy,

This may not belong here, if so apologies...

I'm a python newbie, but have completed a console app that I'd like to run 
under X. Reading recent postings here, wxpython seemed a reasonable choice so 
under debian sid, I installed (via apt-get) the various wxpython stuff 
available.:

libwxgtk2.4-python 
libwxgtk2.5.3-python
python-opengl
python-pythoncard
python2.1-opengl 
python2.2-opengl 
python2.3-opengl 
python2.3-pythoncard
pythoncard 
pythoncard-doc
pythoncard-tools
wx2.5-examples
wxpython2.5.3 
wxwin2.4-examples

test.py crashes with the error below. Any clues?  

===========

Running test.py: 

Traceback (most recent call last):
  File "./test.py", line 87, in ?
    app = MyApp(0)     # Create an instance of the application class
  File "/usr/lib/python2.3/site-packages/wxPython/wx.py", line 1951, in 
__init__
    _wxStart(self.OnInit)
  File "./test.py", line 76, in OnInit
    frame = MyFrame(None, -1, "This is a test")
  File "./test.py", line 26, in __init__
    self.Bind(wx.EVT_SIZE, self.OnSize)
AttributeError: MyFrame instance has no attribute 'Bind'


From leszczynscy at nospamyahoo.com  Tue Apr 26 22:27:00 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Tue, 26 Apr 2005 21:27:00 -0500
Subject: How remove directories with the content in the platform independent
 way?
Message-ID: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>

How remove directories with the content in the platform independent way?
Is the API for that?

Thx, A.


From thegrizzzly at yahoo.com  Tue Apr 12 17:11:27 2005
From: thegrizzzly at yahoo.com (Raffi)
Date: 12 Apr 2005 14:11:27 -0700
Subject: Web Application Client Module
Message-ID: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>

Hi All,

I hope I'm posting this question to the correct newsgroups. We have a
web based database application that's accessed using IE. The
application opens a popup window to run in. With all the popup blockers
and compromised browsers out there, I'm looking into developing a web
based custom client side application to access the application with.
The application will be developed to only reach the web application
site using the https protocol. It also needs to javascript enabled. It
will be downloaded from the main web site and used to access the
database application.

Any suggestions/ideas on how to go about developing the client
application? What tools tools are out there for such a project.

Thanks,
Raffi



From tjreedy at udel.edu  Thu Apr 21 22:35:56 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 22:35:56 -0400
Subject: How can I verify that a passed argument is an
	interiblecollection?
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net><4267BFEA.9070206@syscononline.com>
	<t89g61hb6vna4294e19tb5b6hqint6l9m2@4ax.com>
Message-ID: <d49nlq$b1e$1@sea.gmane.org>

> On Thu, 21 Apr 2005 09:59:54 -0500, Larry Bates
> <lbates at syscononline.com> wrote:
>
>>2) Or if you not you could see if the argument has next and
>>__iter__ methods (more general solution)
>>
>>if  hasattr(arg, 'next') and not hasattr(arg, '__iter__'):
>>    # perform work on iterable

The 'not' is a mistake and should be deleted.  Iterators *do* have __iter__ 
methods, as suggested by the previous sentence.  But anyway, I believe 
strings (or some builtin) still use __getitem__ instead of __next__, so 
this test is not adequate for everything.

Terry J. Reedy





From m at m.com  Wed Apr 27 11:39:31 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 23:39:31 +0800
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
	<116v84ftiq01ucb@corp.supernews.com>
Message-ID: <426fb233$1_2@rain.i-cable.com>

> py2exe has nothing to do with C or make files.  You create a
> setup.py file containing a couple lines of python.  You run
> that python program, and you end up with an .exe file and some
> associated .dll files.  I typically use inno-setup to create an
> installer.exe that creates a desktop icon and start-menu entry,
> but that's optional.

Is py2exe used to make a .exe file to install .py, or make the self-contain
.exe file of the program itself?




From jjl at pobox.com  Wed Apr  6 14:54:16 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Apr 2005 19:54:16 +0100
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<mailman.1419.1112771209.1799.python-list@python.org>
	<du7ll7wicbx.fsf@mozart.cc.tut.fi>
Message-ID: <r7hnka7b.fsf@pobox.com>

Ville Vainio <ville at spammers.com> writes:

> >>>>> "Miki" == Miki Tebeka <miki.tebeka at zoran.com> writes:
> 
>     Miki> Emacs (or VIm in my case) takes time to learn. However when
>     Miki> you start to understand it and know you way around it'll do
>     Miki> things no other editor will do for you.
> 
> Other editors also do stuff Emacs won't do. Code completion is a
> killer feature and emacs sucks at it (yes, w/ Cedet too).
[...]

I thought that too, but then I bound dabbrev-expand to F4, and it
seems even better than 'proper' completion (for reducing keystrokes,
anyway).


John



From quantumcheesedog at gmail.com  Wed Apr  6 20:08:13 2005
From: quantumcheesedog at gmail.com (python newbie)
Date: Thu, 07 Apr 2005 00:08:13 GMT
Subject: Harvestman install not working
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
	<1112811970.231676.122830@g14g2000cwa.googlegroups.com>
Message-ID: <NR_4e.19551$zl.11524@newssvr13.news.prodigy.com>

Thanks Anand, (both for writing Harvest,  and for the reply.)
By the way, I did try that, so that the command is:

c:\python23\python.exe install.py py2exe -O2 --packages=encodings

And this time the dist folder was created, but there were only these files
in there:

library.zip
python23.dll
unicodedata.pyd
w9xpopen.exe
zlib.pyd
_sre.pyd

I'll keep trying though.





"Anand" <abpillai at gmail.com> wrote in message 
news:1112811970.231676.122830 at g14g2000cwa.googlegroups.com...
> Hi
>
>    Latest version of py2exe does not support the option
> --force-imports anymore I think. You can edit the .bat file to remove
> that option. It should work.
>
> -Anand
> 




From aahz at pythoncraft.com  Sat Apr  2 12:59:36 2005
From: aahz at pythoncraft.com (Aahz)
Date: 2 Apr 2005 12:59:36 -0500
Subject: Simple thread-safe counter?
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
Message-ID: <d2mmi8$g9t$1@panix2.panix.com>

In article <mailman.1224.1112418208.1799.python-list at python.org>,
Skip Montanaro  <skip at pobox.com> wrote:
>
>Obviously, if you want multiple counters for some reason a little
>information hiding with a class would help (also untested):
>
>    import Queue
>
>    class Counter:
>        def __init__(self, start=0):
>            self.counter = Queue.Queue()
>            self.counter.put(start)
>
>        def __call__(self):
>            i = self.counter.get()
>            self.counter.put(i+1)
>            return i

This is one case where'd recommend using a plan RLock() instead of using
Queue -- the RLock() will be more efficient:

import threading

class Counter:
    def __init__(self, start=0, increment=1):
        self.counter = start
        self.increment = increment
        self.lock = threading.RLock()
    def __call__(self):
        self.lock.acquire()
        self.counter += self.increment
        i = self.counter
        self.lock.release()
        return i

There are several tricks one can use to squeeze further efficiency gains
from this, including using Lock() instead of RLock().
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From TechAlerts at gmail.com  Tue Apr 12 09:13:38 2005
From: TechAlerts at gmail.com (Kanthi Kiran Narisetti)
Date: 12 Apr 2005 06:13:38 -0700
Subject: Programming Language for Systems Administrator
In-Reply-To: <op.so37qgvcqfv3if@localhost>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<op.so37qgvcqfv3if@localhost>
Message-ID: <1113311618.838281.205380@l41g2000cwc.googlegroups.com>

Hi All,

Thank You for your suggestions....I request you all to eloborate the
Uses(In Practical) for systems administrator.Some of my questions
regarding the same follows.

1)Can i build web applications in Python ? If so how. I am planning to
build a web application for intranet use which deals with workflow of
Internal office communication.

2)Which is best opensource database to be used with Python ?

3)When i write a remote execution script in python is it required that
python should be installed in remote system.

4)I heard about Perl/CGI and that CGI application done by python
too.....Is CGI still valid when PHP has taken over the WebApplication
Development, Dominating.

Sorry if these questions are out of this group , but answers to these ?
will help me a lot.

Thanks in Advance

Kanthi.



From bokr at oz.net  Thu Apr 28 01:34:51 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 28 Apr 2005 05:34:51 GMT
Subject: regex over files
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
	<426EAA9D.2050904@jessikat.fsnet.co.uk>
	<pan.2005.04.26.21.39.15.988504@jerf.org>
	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<mailman.2611.1114656019.1799.python-list@python.org>
Message-ID: <427071cc.101435286@news.oz.net>

On Wed, 27 Apr 2005 21:39:45 -0500, Skip Montanaro <skip at pobox.com> wrote:

>
>    Robin> I implemented a simple scanning algorithm in two ways. First buffered scan 
>    Robin> tscan0.py; second mmapped scan tscan1.py.
>
>    ...
>
>    Robin> C:\code\reportlab\demos\gadflypaper>\tmp\tscan0.py dingo.dat
>    Robin> len=139583265 w=103 time=110.91
>
>    Robin> C:\code\reportlab\demos\gadflypaper>\tmp\tscan1.py dingo.dat
>    Robin> len=139583265 w=103 time=140.53
>
>I'm not sure why the mmap() solution is so much slower for you.  Perhaps on
>some systems files opened for reading are mmap'd under the covers.  I'm sure
>it's highly platform-dependent.  (My results on MacOSX - see below - are
>somewhat better.)
>
>Let me return to your original problem though, doing regex operations on
>files.  I modified your two scripts slightly:
>
>tscan0.py:
>
>    import sys, time, re
>    fn = sys.argv[1]
>    f=open(fn,'rb')
>    n=0
>    t0 = time.time()
>    while 1:
>         buf = f.read(4096)
>         if not buf: break
>         for i in re.split("XXXXX", buf):
To be fairer, I think you'd want to hoist the re compilation out of the loop.
But also to be fairer, maybe include the overhead of splitting correctly, at
least for the simple case regex in my example -- or is a you-goofed post
for me in the usenet forwarding queues somewhere still? ;-)

>             n += 1
>    t1 = time.time()
>
>    print "n=%d time=%.2f" % (n, (t1-t0))
>
>tscan1.py:
>
>    import sys, time, mmap, os, re
>    fn = sys.argv[1]
>    fh=os.open(fn,os.O_RDONLY)
>    s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
>    t0 = time.time()
>    n = 0
>    for mat in re.split("XXXXX", s):
>        n += 1
>    t1 = time.time()
>
>    print "n=%d time=%.2f" % (n, (t1-t0))
>
>The mmap version is almost obviously correct, assuming what we want to do is
>split the file on "XXXXX".  The buffered read version is almost certainly
>incorrect, given our understanding that corner cases lurk at buffer
>boundaries.
>I took the file from Bengt Richter's example and replicated it a bunch of
>times to get a 122MB file.  I then ran the above two programs against it:
>
>    % python tscan1.py splitX
>    n=2112001 time=8.88
>    % python tscan0.py splitX
>    n=2139845 time=10.26
>
>So the mmap'd version is within 15% of the performance of the buffered read
with regex recompilation in loop ;-)
>version and we don't have to solve the problem of any corner cases (note the
>different values of n).  I'm happy to take the extra runtime in exchange for
>simpler code.
>
Agree. Hm, I wonder if the OS notices sequential page faults and schedules speculative
read-ahead. Hm2, I wonder if you can just touch bytes from another coordinated thread
to cause that, if it isn't happening ;-) Not for 15% though ;-)

Regards,
Bengt Richter


From klaus at seistrup.dk  Sat Apr 16 09:21:51 2005
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sat, 16 Apr 2005 13:21:51 +0000 (UTC)
Subject: unicode "em space" in regex
References: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd624bf.3k0.klaus@main.szn.dk>

Xah Lee :

> how to represent the unicode "em space" in regex?
>
> e.g. i want do something like this:
>
>     fracture=re.split(r'\342371*\|\342371*',myline,re.U)

I'm not sure what you're trying to do, but would it help you to use
it's name:

	>>> EM_SPACE = u'\N{EM SPACE}'
	>>> fracture = myline.split(EM_SPACE)

?

Cheers,

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From peter at engcorp.com  Sat Apr  2 10:24:09 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 02 Apr 2005 10:24:09 -0500
Subject: unittest vs py.test?
In-Reply-To: <roy-9D39C9.20265001042005@reader1.panix.com>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
	<roy-9D39C9.20265001042005@reader1.panix.com>
Message-ID: <6I-dnbtiIZLWJNPfRVn-hA@powergate.ca>

Roy Smith wrote:
> Actually, I believe it does.  I'm just starting to play with this, but it 
> looks like you can do:
> 
> py.test test_sample.py
> 
> and it'll run a single test file.  

Well, my driver script can do that too.  I just meant
I could do "test_sample.py" and have it run the test
any time, if I wanted, and I was mainly trying to
show that even the __name__ == '__main__' part of
my example was not essential to the use of unittest.
Comparing apples to apples, so to speak, since it
looks like you don't use an import to get access
to py.test.

As near as I can tell, other than requiring an import
statement, and a class statement, there is zero
additional overhead with unittest versus py.test,
given the way I want to structure my tests (in
functions or methods).  Is that true?  If so, I stand
by my claim that the difference in "weight" between
the two is much much less than some have claimed.

-Peter


From johnandsarah at estragon.freeserve.co.uk  Thu Apr 14 19:28:04 2005
From: johnandsarah at estragon.freeserve.co.uk (John Perks and Sarah Mount)
Date: Fri, 15 Apr 2005 00:28:04 +0100
Subject: wxPython OGL: How make LineShape text b/g transparent?
Message-ID: <d3mu8v$m5a$1@news8.svr.pol.co.uk>

(Having problems receiving wxPython mailing list entries, so I'll ask here.)

I'm using wxPython 2.5.4, windows ansi version, on Python 2.4, the OS in
Win98SE. My application manipulates a graph, with CircleShapes for nodes and
LineShapes for arcs. The user needs to be able to get and set text on a arc.
When I use LineShape.AddText(), a large rectangle of background colour
blocks out much of the line, crucially including the arrow at the midpoint.

How I can I make the text b/g transparent so the lines can be seen, and
further is it possible programmatically to displace the text such that the
arrow is not covered?

Thanks

John




From g.brandl at gmx.net  Tue Apr  5 13:07:58 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Tue, 05 Apr 2005 19:07:58 +0200
Subject: re module non-greedy matches broken
In-Reply-To: <1155e6kak0ufk60@corp.supernews.com>
References: <mailman.1325.1112651826.1799.python-list@python.org>
	<1155e6kak0ufk60@corp.supernews.com>
Message-ID: <3bfuu6F6jnrj3U1@individual.net>

lothar wrote:
> give an re to find every innermost "table" element:
> 
> innertabdoc = """
> <table border="0" cellspacing="0" cellpadding="0">
>   <tr><td>
> <table border="0" cellspacing="0" cellpadding="0">
>   <tr><td> <a>n</a>
>   </td></tr>
> </table>
>   </td></tr>
> </table>
> <table border="0" cellspacing="0" cellpadding="0">
>   <tr><td>
> <table border="0" cellspacing="0" cellpadding="0">
>   <tr><td> </td> <td>
> <table border="0" cellspacing="0" cellpadding="0">
>   <tr><td> <p>y</p> <td> z</td>
>   </td></tr>
> </table>
>   </td></tr>
> </table>
>   </td></tr>
>   <tr><td>
> <table border="0" cellspacing="0" cellpadding="0">
>   <tr><td>
>   </td></tr>
> </table>
>   </td></tr>
> </table>
> """

REs are Regular Expressions, not parsers. There are problems for
which there is no RE solution (I'm not implying that this is the
case in your example).

In any case, complex text processing should be done using tools
better suited to this. In this case, HTMLParser seems like a
reasonable choice.

mfg
Georg


From bokr at oz.net  Wed Apr 13 17:52:45 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 13 Apr 2005 21:52:45 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
Message-ID: <425d87d5.307229753@news.oz.net>

On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com> wrote:

>Bengt Richter wrote at 03:19 4/13/2005:
>>On Wed, 13 Apr 2005 02:06:11 -0700, Dick Moores <rdm at rcblue.com> wrote:
>>
>> >I need to figure out how to compute pi to base 12, to as many digits as
>> >possible. I found this reference,
>> ><http://mathworld.wolfram.com/Base.html>, but I really don't understand
>> >it well enough. Could someone show me how to do what I need?
>> >
>> >Thanks,
>> >
>> >Dick Moores
>> >rdm at rcblue.com
>> >
>>See if this is enough digits for homework? ;-)
>
>This is not homework, nor am I a student, though I am trying to learn 
>Python. I'm just trying to help an artist acquaintance who needs (I just 
>learned) the first 3003 digits of pi to the base 12.
>
>>Hint: Lambert Meertens. Tweak the algorithm you find ;-)
>
>Sorry. Your hint is beyond me.
>
If you google with this line in the slot:

    lambert meertens pi site:python.org

the first hit is

    http://mail.python.org/pipermail/tutor/2000-August/002143.html

In that (scroll down) you will find:

--------------------------------------------------
# Based on a algorithm of Lambert Meertens (remember those days of the
# B -> ABC-programming language!!!)


import sys

def main():
    k, a, b, a1, b1 = 2L, 4L, 1L, 12L, 4L
    while 1:
        p, q, k = k*k, 2L*k+1L, k+1L
        a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
        d, d1 = a/b, a1/b1
        while d == d1:
            output(d)
            a, a1 = 10L*(a%b), 10L*(a1%b1)
            d, d1 = a/b, a1/b1

def output(d):
    sys.stdout.write(`int(d)`)
    sys.stdout.flush()

main()

# Reading/writing Python source often gives me the impression of
# reading/writing a poem!
# Layout, indentation, rythm, I like the look and feel!

# What does this tiny program do? It is not a sonnet, even not a
# pi-sonnet, but it surely produces Pi!
--------------------------------------------------

If you replace
            a, a1 = 10L*(a%b), 10L*(a1%b1)
with
            a, a1 = 12L*(a%b), 12L*(a1%b1)

and
    sys.stdout.write(`int(d)`)
with
    sys.stdout.write('%X'%d`)

and run it, I think it will do what you want, even though I haven't worked through exactly
what it's doing, though it's pretty. (For confidence I just tried it and decoded the result
far enough to match math.pi exactly ;-)

(the %X formats hex, but for single digits that's fine for base 12, giving A for 10 and B for 11.
If you want bases >16 you'll have to use something like '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'[digitvalue])

BTW, I find that googling restricted to site:python.org
is a good bet for python-related info. After that, if no joy,
you can of course expand the search.

BTW2, I played with using pi digits to various bases as directions for turtle-style plotting, to
see if my eye would pick out patterns in the random-seeming sequence. Also played with coloring
the vector steps. I.e., set up a base-length (12 in your case) list of (dx,dy) tuples
for relative plot vectors and just relatively plot deltalist[pidigitvalue] and update the display
so you can see it develop. It was kind of interesting. For bases under 4 you have to decide what
to do with the "first" digit ;-)

Regards,
Bengt Richter


From jjl at pobox.com  Fri Apr 29 14:53:01 2005
From: jjl at pobox.com (John J. Lee)
Date: 29 Apr 2005 19:53:01 +0100
Subject: Data smoothing algorithms?
References: <000c01c54c38$313eb580$0201a8c0@mcuf7>
Message-ID: <64y5qusy.fsf@pobox.com>

"Anthra Norell" <anthra.norell at tiscalinet.ch> writes:

> Hi,
> 
> The following are differences of solar declinations from one day to
> the next, (never mind the unit). Considering the inertia of a
> planet, any progress of (apparent) celestial motion over regular
> time intervals has to be highly regular too, meaning that a plot
> cannot be jagged. The data I googled out of Her Majesty's Nautical
> Almanac are merely nautical precision and that, I suppose, is where
> the jitter comes in. There's got to be algorithms out there to iron
> it out. If it were a straight line, I could do it. But this, over
> the whole year, is a wavy curve, somthing with a dominant sine
> component. Suggestions welcome.

The important thing is to have a (mathematical, hopefully) model of
how you expect the data to vary with time.  Start from there, and
then, for example, use regression to fit a curve to the data.

The "Numerical Recipes" (Press et al.) book is popular and IMHO is a
good place to learn about these things (comes in several language
flavours, including Fortran and C -- sadly no Python AFAIK), though
the implementations aren't a great choice for serious "production"
use, according to those in the know.

OTOH, there are quick and dirty methods that don't involve any model
worth speaking of -- and Press et al. covers those too :-)


John



From xah at xahlee.org  Sat Apr 16 07:53:57 2005
From: xah at xahlee.org (Xah Lee)
Date: 16 Apr 2005 04:53:57 -0700
Subject: unicode "em space" in regex
Message-ID: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>

how to represent the unicode "em space" in regex?

e.g. i want do something like this:

    fracture=re.split(r'\342371*\|\342371*',myline,re.U)

 Xah
 xah at xahlee.org
? http://xahlee.org/



From Paul.Casteels at ua.ac.be  Fri Apr  8 03:21:42 2005
From: Paul.Casteels at ua.ac.be (Paul Casteels)
Date: Fri, 08 Apr 2005 09:21:42 +0200
Subject: logging as root using python script
In-Reply-To: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
Message-ID: <d35be7$cms$1@ikaria.belnet.be>

Raghul wrote:
> Hi
>    Is it possible to login as a root in linux using python script?
> What I need is when I execute a script it should login as root and
> execute my command and logout from root to my existing account. IS is
> possible?
> 
> Thanx in advance.
> 
Hi,

  You can compile the small .c program and setuid it's executable.
  Change the path to your .py script of course.


#include <sys/types.h>
#include <unistd.h>

int main(int argc,char **argv)
{
         char *c1[]={"/tmp/Chg.py\0",'\0'};

         setuid(0);
         seteuid(0);
         execv(c1[0],c1);
         return 1;
}


From greg at cosc.canterbury.ac.nz  Thu Apr 14 00:13:06 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 14 Apr 2005 16:13:06 +1200
Subject: Best editor?
In-Reply-To: <861x9gwvys.fsf@guru.mired.org>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com> <86k6nbww6z.fsf@guru.mired.org>
	<d39ooc$pvr$1@panix1.panix.com> <861x9gwvys.fsf@guru.mired.org>
Message-ID: <3c68utF6jaogjU2@individual.net>

Mike Meyer wrote:

> Gee, it's changed from eight to eighty. Probably because eight is a
> small app by todays standards. Then again, it's not like 80 is large
> these days.

Yeah, it's probably time to upgrade it to 800. :-)

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From franz.steinhaeusler at utanet.at  Tue Apr  5 09:01:25 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Tue, 05 Apr 2005 15:01:25 +0200
Subject: Python IDE like NetBeans/Delphi IDE
References: <mailman.1376.1112702768.1799.python-list@python.org>
Message-ID: <5b25511ggv7g2h7s2h3tc567a2estc38bu@4ax.com>

On Tue, 05 Apr 2005 14:07:14 +0200, "fowlertrainer at anonym.hu"
<fowlertrainer at anonym.hu> wrote:

>
>I search for an IDE that working in Windows, and knows these functions:
>
>A.) Automatic name searching/showing/extending on classes with 
>keypressing (like Netbeans, or Delphi Ctrl+Space).
>B.) Debugging: breakpoints, step on lines (code), watch variables.
>
>Or A and B both.
>

What about Boa Constructor for A.)?

I personally don't like the debugger so much,
IMHO Hap Debugger is better and is similar to Visual Studio Debugger.

You can also try DrPython (the development debugger is apparantly in
process).


-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From Daniel.Cer at gmail.com  Sun Apr 24 20:57:19 2005
From: Daniel.Cer at gmail.com (Daniel Cer)
Date: Sun, 24 Apr 2005 18:57:19 -0600
Subject: pygtk and long running process
In-Reply-To: <pan.2005.04.25.10.17.03.869604@gmail.com>
References: <pan.2005.04.25.10.17.03.869604@gmail.com>
Message-ID: <426C406F.2070702@gmail.com>

Robert wrote:
> I have a command line app that can take up to 20 minutes to complete and
> every minute or so updates it's status (spits it out to console).  I am
> writing a front end for this app in python/gtk and was wondering what
> command I use to a) invoke the command and b) how to capture it's out put
> and for instance update a text box.

os.popen() will probably do what you want.

e.g.:

import os

some_external_command = "ls"
prog_output = os.popen(some_external_command)
for status_line in prog_output:
         print status_line

-Dan


From sxanth at cs.teiath.gr  Sat Apr  2 13:17:21 2005
From: sxanth at cs.teiath.gr (stelios xanthakis)
Date: Sat, 02 Apr 2005 21:17:21 +0300
Subject: Can I play too?
In-Reply-To: <424edd84$1@nntp0.pdx.net>
References: <mailman.1239.1112456748.1799.python-list@python.org>
	<87u0mpm8o9.fsf@thomas.local> <424edd84$1@nntp0.pdx.net>
Message-ID: <424EE1B1.2010700@cs.teiath.gr>

Scott David Daniels wrote:

> if __name__ == '__main__':
>     import sys
>     main(sys.argv[1:] or ['anagrams.py'])

This is *exactly* the kind of testcases I'm looking for to test
the soon-to-be-released pyvm.  Great!  I'll be back with results.


For now, a fast anagrams.py is
--------------------------------------
import sys

WORDS = [ i.rstrip () for i in file ('/usr/share/dict/words') ]

def findana (anagram):
     sorted_anagram = sorted(anagram.lower())
     len_anagram = len (anagram)
     found = [ word for word in WORDS if len(word)==len_anagram and 
sorted(word)==sorted_anagram ]
     print "Anagrams of %s: %s" % (anagram, ' '.join(found))

for i in sys.argv [1:]:
     findana (i)
-----------------------------------------


And timings....

time python anagram.pyc stop step words lots pool eat fast slow lamp 
cold door xyzzy
Anagrams of stop: opts post pots spot stop tops
Anagrams of step: pest pets sept step
Anagrams of words: sword words
Anagrams of lots: lost lots slot
Anagrams of pool: loop polo pool
Anagrams of eat: ate eat tea
Anagrams of fast: fast fats
Anagrams of slow: lows owls slow
Anagrams of lamp: lamp palm
Anagrams of cold: clod cold
Anagrams of door: door odor
Anagrams of xyzzy:

real	0m1.491s
user	0m1.390s
sys	0m0.040s

time pyvm anagram.pyc stop step words lots pool eat fast slow lamp cold 
door xyzzy
Anagrams of stop: opts post pots spot stop tops
Anagrams of step: pest pets sept step
Anagrams of words: sword words
Anagrams of lots: lost lots slot
Anagrams of pool: loop polo pool
Anagrams of eat: ate eat tea
Anagrams of fast: fast fats
Anagrams of slow: lows owls slow
Anagrams of lamp: lamp palm
Anagrams of cold: clod cold
Anagrams of door: door odor
Anagrams of xyzzy:

real	0m0.923s
user	0m0.760s
sys	0m0.070s


-------
Stelios



From grig.gheorghiu at gmail.com  Mon Apr  4 20:04:53 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 4 Apr 2005 17:04:53 -0700
Subject: Web application toolkit recommendation?
In-Reply-To: <mailman.1333.1112659316.1799.python-list@python.org>
References: <mailman.1333.1112659316.1799.python-list@python.org>
Message-ID: <1112659493.858953.301940@o13g2000cwo.googlegroups.com>

Check out http://pyre.third-bit.com/pyweb/index.html

Grig



From pdemb at gazeta.pl  Tue Apr 19 14:28:57 2005
From: pdemb at gazeta.pl (Peter Dembinski)
Date: Tue, 19 Apr 2005 20:28:57 +0200
Subject: Refactoring in Python.
References: <8764yiog3y.fsf@hector.domek>
	<mailman.2120.1113930792.1799.python-list@python.org>
Message-ID: <87y8bemxhy.fsf@hector.domek>

Skip Montanaro <skip at pobox.com> writes:

>     Peter> I am trying to write Master Thesis on refactoring Python
>     Peter> code.  Where should I look for information?
>
> I'm not sure, but one piece of code to check out would probably 
> be Bicycle Repair Man, a early-stage prototype refactoring tool 
> for Python.  I don't recall where it's hosted.  Google will know.

Well, I can't simply describe Bicycle Repairing Man in my thesis :)

The idea is to define some 'mechanics' for refactoring Python code
without specialized refactoring browser.  In other words, I want 
to convert Fowler's refactorizations to Python.

Similar work (or its seeds) is here:
http://hiper.com.br/python/refactor/index.html

-- 
http://www.dembi?ski.prv.pl 


From ville at spammers.com  Wed Apr 27 02:00:22 2005
From: ville at spammers.com (Ville Vainio)
Date: 27 Apr 2005 09:00:22 +0300
Subject: Python internal design
References: <pan.2005.04.26.19.53.14.623507@ldre.Vanderbilt.Edu>
Message-ID: <du7acnkiwsp.fsf@lehtori.cc.tut.fi>

>>>>> "Emre" == Emre Turkay <turkaye at ldre.Vanderbilt.Edu> writes:

    Emre> Hi Folks,

    Emre> I am designing a tool, in which there are dynamic types and
    Emre> variables with these types. In this respect, it is more like
    Emre> an interpreted language design.

    Emre> I wonder how these issues are implemented in Python are
    Emre> there any documents or articles about it, which I can read
    Emre> and get an idea.

It's built around string lookup. 

obj.stuff() -> look up what object is associated with string 'stuff',
get the object, see how it can be called, call it.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From trentm at ActiveState.com  Fri Apr  1 18:35:49 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Fri, 1 Apr 2005 15:35:49 -0800
Subject: System bell
In-Reply-To: <d2kjig$rjt$1@newsg3.svr.pol.co.uk>
References: <BE723DD5.63FD%baza@themauvezone.fsnet.co.uk>
	<20050331235011.GD1786@ActiveState.com>
	<mailman.1171.1112339197.1799.python-list@python.org>
	<424d0662.7277153@news.oz.net> <d2kjig$rjt$1@newsg3.svr.pol.co.uk>
Message-ID: <20050401233549.GC15305@ActiveState.com>

[Mr6 wrote]
> It's a weird thing. But if I run print "\a" from idle it does not work. 
> But if I save as a file, say, sound.py. Then run that with python 
> sound.py it does.
> 
> Why is that?

The IDLE stdout/stderr handling is not invoking a system bell when it
sees '\a'. I suppose that one could consider that a bug. If I were an
IDLE developer/maintainer, I don't think I'd rate that as a very high
prioirty bug though. :)

Trent

-- 
Trent Mick
TrentM at ActiveState.com


From LMachado1 at gmail.com  Fri Apr 15 19:05:34 2005
From: LMachado1 at gmail.com (Lucas Machado)
Date: 15 Apr 2005 16:05:34 -0700
Subject: trouble using \ to escape %
Message-ID: <1113606334.524947.54630@l41g2000cwc.googlegroups.com>

I'm writing a python script that modifies the smb.conf file, and i need
to write the characters '%U' in the file.  I tried making a string like
so:

str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%U" % (list[0], list[1],
list[0], list[1])

but i keep getting: "TypeError: not enough arguments for format
string". I've also tried making the string:

str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%" % (list[0], list[1],
list[0], list[1])

but i get: "ValueError: incomplete format". These errors lead me to
believe that for some reason it is not escaping the '%' character.
There has to be a way to write '%' to a file. Thanks in advance..

Cheers
-Lucas Machado



From mwm at mired.org  Fri Apr 22 18:41:22 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 17:41:22 -0500
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
Message-ID: <86k6musact.fsf@guru.mired.org>

"dcrespo" <dcrespo at gmail.com> writes:

> Hi Grant Edwards...
>
> Your solution requires a previous installation of Acrobat. Internally,
> the OS is sending the pdf file to the Acrobat PDF Driver and then it is
> sent to the printer. So you have to have Acrobat installed. Don't you?

No, you don't. My print system does that, and I don't have acrobat
installed. I have ghostscript installed, which includes pdf2ps - which
handles this particular translation.

> This is what exactly I need to do:
> Generate an invoice of 216cm width and 93cm height (1/3 of the height
> of a letter paper size), and print it respecting these dimensions. So,
> when I print this page on a dot matrix printer, it stops at those 93cm
> of height for continuous printing.

Ok, I'm a masochist. When I have problems like this (i.e. - printing
CD labels, addressing envelopes, etc) I just have the python generate
raw postscript. That gives you more than enough control over the
output to solve the problem. Integrating it with a GUI is another
matter, though.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From luismgz at gmail.com  Fri Apr  1 08:19:13 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 1 Apr 2005 05:19:13 -0800
Subject: dictionary: sorting the values preserving the order
In-Reply-To: <mailman.1176.1112343550.1799.python-list@python.org>
References: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
	<mailman.1176.1112343550.1799.python-list@python.org>
Message-ID: <1112361553.498996.192270@z14g2000cwz.googlegroups.com>

Another alternative:

d1 = {'a':4,'b':5,'c':1,'d':2,'e':3?}

il=[(v,k) for k,v in d1.items()]
il.sort()



From bytecolor at yahoo.com  Sun Apr 17 17:54:43 2005
From: bytecolor at yahoo.com (bytecolor)
Date: 17 Apr 2005 14:54:43 -0700
Subject: module to parse "pseudo natural" language?
References: <d3thql$4rh$1@news.hispeed.ch>
Message-ID: <1113774883.240775.45110@z14g2000cwz.googlegroups.com>

Andrew E wrote:
> Hi all
>
> I've written a python program that adds orders into our order routing
> simulation system. It works well, and has a syntax along these lines:
>
>   ./neworder --instrument NOKIA --size 23 --price MARKET --repeats 20
>
> etc
>
> However, I'd like to add a mode that will handle, say:
>
>   ./neworder buy 23 NOKIA at MKT x 20
>
> I could enter several orders either by running multiple times, or use
a
> comma-separated approach, like:
>
>   ./neworder buy 23 NOKIA at MKT on helsinki, sell 20 NOKIA at market
on
> helsinki

You could add a string option instead:
$ neworder -c 'buy 23 NOKIA at MKT on helsinki, sell 20 NOKIA at market
on helsinki'

This would leave your current option parsing in tact. Then just
split on the comma.

Another suggestion would be to drop into an interactive mode if
no arguments are passed:
$ neworder
->? buy 23 NOKIA at MKT on helsinki
->? sell 20 NOKIA at market on helsinki
->? ^d

> The thing about this is that its a "tolerant" parser, so all of these
> should also work:
>
>   # omit words like "at", "on"
>   ./neworder buy 23 NOKIA mkt helsinki
>
>   # take any symbol for helsinki
>   ./neworder buy 23 mkt helsinki
>
>   # figure out that market=helsinki
>   ./neworder buy 23 NOKIA at market price
>
>
> I've started writing a simple state-based parser, usage like:
>
>   class NaturalLanguageInsructionBuilder:
>
>     def parse( self, arglist ):
>       """Given a sequence of args, return an Instruction object"""
>       ...
>       return Instruction( instrument, size, price, ... )
>
>
>   class Instruction:
>     """encapsulate a single instruction to buy, sell, etc"""
>
>     def __init__( self, instrument, size, price, ... ):
>       ...
>
>
> This doesn't work yet, but I know with time I'll get there.
>
> Question is - is there a module out there that will already handle
this
> approach?
>
> Thanks for any suggestions :)
>
> Andrew

If I were in your situation, I'd probably write a BNF for the
tiny-language. This would help wrap my brain around the problem.
The BNF would help show what kind of regular expression you are
looking at creating as well.

--
bytecolor



From fredrik at pythonware.com  Thu Apr 14 17:47:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 14 Apr 2005 23:47:58 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com><1113490437.037734.158740@g14g2000cwa.googlegroups.com>	<425EB9CA.1010708@transnorm.ch><d3ml4c$crn$1@sea.gmane.org>
	<425EDE12.3030208@transnorm.ch>
Message-ID: <d3mo6p$n3p$1@sea.gmane.org>

Tiziano Bettio wrote:

> Actually your script doesn't work on my python distribution...
>
> (using 2.3.2)

since then, 2.3.3, 2.3.4, 2.3.5, 2.4, and 2.4.1 has been released.  since
the code uses generator expressions, you need at least 2.4.

(or you can add [] around the generator expressions, to turn them into
list comprehensions)

</F> 





From gnb at itga.com.au  Wed Apr 20 04:11:12 2005
From: gnb at itga.com.au (Gregory Bond)
Date: Wed, 20 Apr 2005 18:11:12 +1000
Subject: PyObject_New not running tp_new for iterators?
Message-ID: <2r254d.moe.ln@lightning.itga.com.au>

I'm trying to extend Python with an iterator class that should be 
returned from a factory function.

For some reason the iterator object is not being properly initialised if 
the iterator is created in a C function.  It works just fine if the 
object is created using the class contructor

Trying to minimise the cut-n-paste, but:

> typedef struct {
>     PyObject_HEAD
> 
>       int i;
>       
> } MyIter;
> 
> 
> static PyObject *
> MyIter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
> {
>     MyIter *self;
> 
>     self = (MyIter *)type->tp_alloc(type, 0);
>     if (self) {
>        self->i = 0;
>     }
> 
>     return (PyObject *)self;
> }
> 
> static PyObject *
> MyIter_Iter(PyObject *self)
> {
>    Py_INCREF(self);
>    return self;
> }
> 
> static PyObject *
> MyIter_Next(PyObject *self)
> {
>    MyIter *ep = (MyIter *) self;
>    return Py_BuildValue("i", ep->i++);
> }


plus the usual type stucture.  This simple iterator returns the integers 
from 0 to (programmer's) infinity.

This works fine if I create the object directly:

> Python 2.3.1 (#3, Oct  1 2003, 16:18:11) 
> [GCC 3.3] on sunos5
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import myiter
>>>> e = myiter.MyIter()
>>>> str(e)
> '<myiter.MyIter object at 0x184050>'
>>>> e.next()
> 0
>>>> e.next()
> 1
>>>> e.next()
> 2
>>>> e.next()
> 3

However, if I create the MyIter object from a C factory function:

> static PyObject *
> FromFile(PyObject *self, PyObject *args)
> {
>    MyIter *ro;
>    
>    if (!PyArg_ParseTuple(args, ""))
>         return NULL;
> 
>    if (!(ro = PyObject_New(MyIter, &MyIterType)))
>       return NULL;
> 
>    return (PyObject *)ro;
> }
> 
> static PyMethodDef My_methods[] = {
>    {"FromFile",  FromFile, METH_VARARGS,
>     "Return an  iterator."},
>     {NULL}  /* Sentinel */
> };

then the MyIter object is not properly initialised!

>>>> f = myiter.FromFile()
>>>> f
> <myiter.MyIter object at 0x184070>
>>>> f.next()
> -2080374694
>>>> f.next()
> -2080374693
>>>> f.next()
> -2080374692
>>>> 

I tried a similar problem with a plane-old-object using tp_members 
(rather than an iterator object) and that worked fine, even from a 
factory function.

I've looked long and hard at the API doc, but I'm stumped.....  I've 
checked a couple of examples and they just do what I'm doing!

What am I missing?


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 08:32:02 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 13:32:02 +0100
Subject: terminate exectutioin in PythonWin
In-Reply-To: <4u6dnQT8_ecAk8DfRVn-pA@comcast.com>
References: <d3j265$ne6$1@scotsman.ed.ac.uk>
	<4u6dnQT8_ecAk8DfRVn-pA@comcast.com>
Message-ID: <d3j3em$nhh$1@scotsman.ed.ac.uk>

Larry Bates wrote:
> 1) To exit any application:
> 
> import sys
> sys.exit(0)

...



Thanks Larry.

Actually I meant how do I stop a program running that I have started in 
the interpreter. If I get into an infinite loop I can't stop it without 
qutting PythonWin.

Then I have to open all the files and re-insert breakpoints etc.  :(

Jim


From onurb at xiludom.gro  Tue Apr 26 05:37:24 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Tue, 26 Apr 2005 11:37:24 +0200
Subject: Simple, elegant, pythonic solution for switch statement
In-Reply-To: <1114499709.437575.266630@z14g2000cwz.googlegroups.com>
References: <1114499709.437575.266630@z14g2000cwz.googlegroups.com>
Message-ID: <426e0bd5$0$20468$626a14ce@news.free.fr>

python_only wrote:
> Check it out!
> 
> Readable switch construction without lambdas or dictionaries:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410692
> 
Not sure I'll have a need for it, but, yes, nice job !-)

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


From steven.bethard at gmail.com  Sat Apr 23 16:41:58 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 23 Apr 2005 14:41:58 -0600
Subject: func_code vs. string problem
In-Reply-To: <d4dtar$4f4$1@nemesis.news.tpi.pl>
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
Message-ID: <04mdnXLeedaPLvffRVn-vQ@comcast.com>

Filip Dreger wrote:
> Each function has a func_code property that is suposed to contain the 
> pure bytecode of the function. All the context (including reference to 
> relevant namespaces) is stored in different fields of the function 
> object. Since 'exec' is able to execute any string or bytecode in the 
> current scope, it would seem possible to execute code of any function 
> in any namespace. But no matter how I tried, I could not do it. There 
> must be something I am missing.
> Here's what I do:    (if anyone wants to help, I placed the source 
> under http://www.bajobongo.net/foo.py - tested on Python 2.4.1)
> 
> 1. I declare a function. In the next steps I will try to run its code 
> from inside a class:
> 
> def myfunction():
>    print abc
>    self.test()
> 
> 2. I declare a class foo, with two methods. The first one tries to 
> reach some local variables from a string passed to exec. The other one 
> tries to do the same from inside a bytecode (from myfunction). IMHE 
> this should make no difference to 'exec' - [spoiler: it does].
> 
> class foo:
>    def test(self):
>       print "ABC"
>    def checkfunction(self):
>       abc=10
>       exec myfunction.func_code
>    def checkstring(self):
>       abc=10
>       exec "print abc;self.test()"
> 
> 3. I test the both methods. Sadly, the 'checkfunction' fails to find 
> the correct namespace (id does not see 'abc' nor 'self'). Adding 
> things like:
> "exec myfunction.func_code in globals(),locals()" does not help.
> 
> i=foo()
> i.checkstring()
> i.checkfunction()  # this throws exception; why???

See the documentation:

http://docs.python.org/ref/dynamic-features.html

"""The eval(), execfile(), and input() functions and the exec statement 
do not have access to the full environment for resolving names. Names 
may be resolved in the local and global namespaces of the caller. Free 
variables are not resolved in the nearest enclosing namespace, but in 
the global namespace."""

Note the last sentence, which tells you that your free variable, 'abc', 
will be resolved in the *global* namespace.  In your particular problem, 
you can solve this by substituting your local namespace for the global 
namespace:

py> def myfunction():
...     print abc
...     self.test()
...
py> class foo:
...     def test(self):
...         print "ABC"
...     def checkfunction(self):
...         abc=10
...         exec myfunction.func_code in locals()
...     def checkstring(self):
...         abc=10
...         exec "print abc;self.test()"
...
py> foo().checkstring()
10
ABC
py> foo().checkfunction()
10
ABC

But note that if your code actually needs access to any globals, it's 
out of luck:

py> def myfunction():
...     print foo
...     print abc
...     self.test()
...
py> foo().checkfunction()
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "<interactive input>", line 6, in checkfunction
   File "<interactive input>", line 2, in myfunction
NameError: global name 'foo' is not defined

One possible workaround might be:

py> class foo:
...     def test(self):
...         print "ABC"
...     def checkfunction(self):
...         abc=10
...         l = locals()
...         l.update(globals())
...         exec myfunction.func_code in l
...     def checkstring(self):
...         abc=10
...         exec "print abc;self.test()"
...
py> foo().checkfunction()
__main__.foo
10
ABC

But I'd have to know what your real use case is to tell you whether or 
not this is worth the trouble.  Why do you want to exec the func_code 
anyway?  Why can't you just call the function?

STeVe


From simon.brunning at gmail.com  Fri Apr 22 04:55:12 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 22 Apr 2005 09:55:12 +0100
Subject: Noobie Question: Using strings and paths in mkdir
	(os.mkdir("/test/"a))
In-Reply-To: <20050422073020.GA74505@isis.sigpipe.cz>
References: <a462a352.0504212313.3bb6d361@posting.google.com>
	<20050422073020.GA74505@isis.sigpipe.cz>
Message-ID: <8c7f10c6050422015541b64b68@mail.gmail.com>

On 4/22/05, Roman Neuhauser <neuhauser+python-list#python.org at sigpipe.cz> wrote:
> > import os
> > a = 'books'
> > os.chdir( '/test')
> > os.mkdir("/test/"a)
> >
> > the last line does not seem to work.  os.mkdir(a) makes the directory
> > books, but i want this directory as a subdirectory of test.
>     http://docs.python.org/ref/string-catenation.html

For this job, os.path.join() might be better. See
<http://docs.python.org/lib/module-os.path.html>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From simon.dahlbacka at gmail.com  Thu Apr 28 08:30:14 2005
From: simon.dahlbacka at gmail.com (Simon Dahlbacka)
Date: Thu, 28 Apr 2005 12:30:14 +0000 (UTC)
Subject: logging problems
Message-ID: <loom.20050428T142438-258@post.gmane.org>

Hi,

I'm currently using python 2.3.4 and I'm having problem with the logging module.

Occasionally when logging something with exc_info=True it just hangs, nothing is
logged, and software cannot continue executing.

By drilling down into logging package and adding rather many print statements
into  logging/__init__.py it seems like the "import traceback" in
formatException(self, ei) fails.

I.e.

print sys.modules["traceback"]
import traceback
print "Hello World"
sys.stdout.flush()

just renders: <module 'traceback' from 'C:\Python23\lib\traceback.pyc'> in the
console, and no "Hello World"

I'm running out of ideas what to try next, so suggestions/ideas appreciated!

/Simon



From codecraig at gmail.com  Mon Apr 18 16:48:50 2005
From: codecraig at gmail.com (codecraig)
Date: 18 Apr 2005 13:48:50 -0700
Subject: Tkinter Event Types
Message-ID: <1113857330.024552.245040@f14g2000cwb.googlegroups.com>

Hi,
  When I do something like.

s = Scale(master)
s.bind("<ENTER>", callback)

def callback(self, event):
    print event.type

I see "7" printed out.  Where are these constants defined for various
event types?  Basically i want to do something like...

def callback(self, event):
    if event.type == ENTER:
        print "You entered"

thanks



From apardon at forel.vub.ac.be  Wed Apr 20 08:52:19 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 20 Apr 2005 12:52:19 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
Message-ID: <slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Torsten Bronger schreef <bronger at physik.rwth-aachen.de>:
> Hall?chen!
>
> nde at no.spam.org (Nick Efford) writes:
>
>> seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
>>> Many people I know ask why Python does slicing the way it does.....
>>
>>> Can anyone /please/ give me a good defense/justification???
>>
>>> I'm referring to why mystring[:4] gives me elements 0, 1, 2 and 3
>>> but *NOT* mystring[4] (5th element).
>>
>> mystring[:4] can be read as "the first four characters of
>> mystring".  If it included mystring[4], you'd have to read it as
>> "the first five characters of mystring", which wouldn't match the
>> appearance of '4' in the slice.
>>
>> [...]
>>
>> It all makes perfect sense when you look at it this way!
>
> Well, also in my experience every variant has its warts.  You'll
> never avoid the "i+1" or "i-1" expressions in your indices or loops
> (or your mind ;).
>
> It's interesting to muse about a language that starts at "1" for all
> arrays and strings, as some more or less obsolete languages do.  I
> think this is more intuitive, since most people (including
> mathematicians) start counting at "1".  The reason for starting at
> "0" is easier memory address calculation, so nothing for really high
> level languages.

Personnaly I would like to have the choice. Sometimes I prefer to
start at 0, sometimes at 1 and other times at -13 or +7.

-- 
Antoon Pardon


From apardon at forel.vub.ac.be  Thu Apr 21 06:33:35 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 10:33:35 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
	<mailman.2204.1114033804.1799.python-list@python.org>
	<slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>
	<3cpc8oF6n6g9bU1@individual.net>
Message-ID: <slrnd6f0bu.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-21, Reinhold Birkenfeld schreef <reinhold-birkenfeld-nospam at wolke7.net>:
> Antoon Pardon wrote:
>
>> I sometimes think python should have been more explicite here,
>> using a marker for the start-index and end-index, may '^' and
>> '$'. So if you wanted the last element you had to write:
>> 
>>   lst[$]
>> 
>> And for the next to last element:
>> 
>>   lst[$ - 1]
>> 
>> 
>> This would make accessing list elements counted from the rear
>> almost just as easy as it is now but wouldn't interfere with
>> the ask forgiveness programming style.
>
> How would you pass this argument to __getitem__?

Well assuming lst.last, was the last index of lst, __getitem__
would get lst.last and lst.last - 1 passed.

> What would be allowed, only '$-x' or also '$+x' or what else?

Any expression where an int is allowed.

> What type would '$' be?

It would be an int.

-- 
Antoon Pardon


From Jeremy.Maxfield at gmx.net  Thu Apr  7 08:06:21 2005
From: Jeremy.Maxfield at gmx.net (Max)
Date: Thu, 7 Apr 2005 14:06:21 +0200
Subject: Resticted mode still active (error?)
References: <d30r27$m7t$1@news.mch.sbs.de>
	<mailman.1435.1112799853.1799.python-list@python.org>
Message-ID: <d337od$apr$1@news.mch.sbs.de>

Not that I know of - the problem only seems to occur when using the Python C
API.
I'm trying to come up with a C programs that shows the error but it'll take
a few days to set up
the emvironment.


>"Jeff Epler" <jepler at unpythonic.net> wrote in message
news:mailman.1435.1112799853.1799.python-list at python.org...




From brent.hughes at comcast.net  Tue Apr 26 14:51:37 2005
From: brent.hughes at comcast.net (Brent W. Hughes)
Date: Tue, 26 Apr 2005 12:51:37 -0600
Subject: [pygame]  Very simple program fails.  Why?
Message-ID: <1tWdneW8RMsvEPPfRVn-og@comcast.com>

I'm just starting to learn pygame.  I write what I think is just about the 
simplest program that should display a window and then quit.
#-----------------------------------------------
import sys
import time
import pygame

pygame.init()
screen = pygame.display.set_mode((640,480))
pygame.display.set_caption("A Bug's Life")
time.sleep(4)
#-----------------------------------------------
When I run this program from within PythonWin, the Bug's Life window appears 
and everything looks okay, but after 4 seconds the window still persists. 
When I finally close it using the close box in the upper right of the 
window, a box pops up telling me an error occurred ant it wants to send a 
report to Microsoft.  I click "Don't send" and another box pops up telling 
me that the program was trying to access memory location 0x1c.

If I try to run the program stand-alone (outside of PythonWin), a DOS box 
pops up for a second or two, then the Bug's Life window flashes up for a 
fraction of a second, and then both windows disappear.

Am I doing something wrong?

Brent





From iny+news at iki.fi  Fri Apr 22 07:05:42 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Fri, 22 Apr 2005 14:05:42 +0300
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
Message-ID: <m3u0lzm5q1.fsf@iny.iki.fi>

Ville Vainio <ville at spammers.com> writes:

>>>>>> "Ilpo" == Ilpo Nyyss?nen <iny> writes:
>
>     Ilpo> The problem in python here is that it needs to always
>     Ilpo> recompile the regexp. I would like to have a way to write a
>     Ilpo> regexp as a constant and then python should compile that
>     Ilpo> regexp to the byte-code file.
>
>     Ilpo> This is a problem when one has a big amount of regexps. One
>     Ilpo> example is the xmlproc parser in PyXML,
>
> Read the source for sre.py, esp. _compile. The compiled regexps are
> cached, so when you invoke e.g. re.match(), it doesn't recompile the
> regexp.

If you would have read what I waid, you would have noticed this:

,----
| I would like to have a way to write a regexp as a constant and then
| python should compile that regexp to the byte-code file.
`----

and this:

,----
| This is not a problem in a program that continues to run long times,
| but I want short lived programs like command line apps.
`----

Of course it caches those when running. The point is that it needs to
recompile every time you have restarted the program. With short lived
command line programs this really can be a problem.

And yes, I have read the source of sre.py and I have made an ugly
module that digs the compiled data and pickles it to a file and then
in next startup it reads that file and puts the stuff back to the
cache.

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From kent37 at tds.net  Sun Apr 24 08:43:56 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 24 Apr 2005 08:43:56 -0400
Subject: Variables
In-Reply-To: <mailman.2383.1114322077.1799.python-list@python.org>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<426b255d.375304108@news.oz.net>	<426B27C1.4000907@cloudthunder.com>
	<mailman.2383.1114322077.1799.python-list@python.org>
Message-ID: <426b9037$1_2@newspeer2.tds.net>

Robert Kern wrote:
> Richard Blackwood wrote:
> 
>> Bengt Richter wrote:
>>> Maybe he doesn't know that foo = 5 in Python is not an equation as in 
>>> math,
>>> but a Python source language statement to be translated to a step in 
>>> some
>>> processing sequence.
>>>
>>> Tell him in Python foo is a member of one set and 5 is a member of 
>>> another,
>>> and foo = 5 expresses the step of putting them into correspondence
>>> to define a mapping, not declaring them equal.
>>>  
>>>
>> Could I honestly argue this to him? From what basis do I argue that it 
>> is not an equation?

 From the basis of reality?

 From the point of view of Python, it is an assignment statement, not an 'equation'. According to 
the docs, "Assignment statements are used to (re)bind names to values....[it] evaluates the 
expression list...and assigns the single resulting object to each of the target lists, from left to 
right."
http://docs.python.org/ref/assignment.html

'foo = 5' means the same as d['foo'] = 5 for some dictionary d. Doesn't sound like an equation to me.

It also might be of interest that googling "equation site:docs.python.org" yields a single hit which 
is talking about random distributions.

If your friend (!) is open-minded enough to learn what the semantics of assignment actually are in 
Python then you might be able to have a more productive conversation.

Kent


From fredrik at pythonware.com  Sun Apr 17 11:40:05 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 17 Apr 2005 17:40:05 +0200
Subject: sscanf needed
References: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
Message-ID: <d3tvpf$2a4$1@sea.gmane.org>

Uwe Mayer wrote:

> I've got a ISO 8601 formatted date-time string which I need to read into a
> datetime object.

>>> import time
>>> help(time.strptime)
Help on built-in function strptime in module time:

strptime(...)
    strptime(string, format) -> struct_time

    Parse a string to a time tuple according to a format specification.
    See the library reference manual for formatting codes (same as
    strftime()).

</F>



From bokr at oz.net  Sun Apr 10 22:08:31 2005
From: bokr at oz.net (Bengt Richter)
Date: Mon, 11 Apr 2005 02:08:31 GMT
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be><1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
Message-ID: <4259c2ed.60213392@news.oz.net>

On Sat, 9 Apr 2005 19:22:16 +0200, "Fredrik Lundh" <fredrik at pythonware.com> wrote:

>Reinhold Birkenfeld wrote:
>
>> It's evil anyway (for more complex applications) to put GUI construction
>> in your code. GUI should be described appropriately in data files.
>
>why use data files when you have an extremely powerful programming
>language in your toolbox?  the advantage of building UI's in Python is
>that you can quickly create "domain specific UI languages", and use them
>to generate the interfaces for you.  UI editors may be useful for trivial
>applications, but if you're doing complex stuff, you sure want domain-
>specific abstractions.  Python gives you that, XML files don't.
>
Suppose tkinter elements all had a standard python property called, say, textview,
and for any given element in a GUI hierarchy, you could get and set and delete
this textview property, with suitable side effects. If you wrote python like
    print mywidget.textview
You might see something like Delphi's representation of a nested "panel" widget
with a label, text entry slot, and button (excerpted from a full form representation):

"""
  object Panel1: TPanel
    Left = 400
    Top = 160
    Width = 185
    Height = 113
    TabOrder = 0
    object Label2: TLabel
      Left = 24
      Top = 16
      Width = 65
      Height = 13
      Caption = 'Example label'
    end
    object Edit1: TEdit
      Left = 24
      Top = 32
      Width = 121
      Height = 21
      TabOrder = 0
      Text = ' (example text entry)'
    end
    object Button1: TButton
      Left = 24
      Top = 64
      Width = 121
      Height = 25
      Caption = 'Example Submit'
      TabOrder = 1
    end
  end
"""

(The parent form or GUI element specifies other things that are inherited (e.g. fonts etc),
so those aren't part of the widget representation unless you have locally
edited those attributes one way or another, in which case they would show up)

(I might add a standard TEXTVIEW_VERSION = ... line as the first line of output
in case you wanted to save a design for later (perhaps much later) but Delphi
doesn't seem to).

Anyway, with a textview property you could write

    open('mywidget_v2.txt','w').write(repr(mywidget.textview)

and if the textview property round-tripped, you could edit mywidget_v2.txt
with emacs or vim or a program, and then (just as an example) write

    mywidget.textview = open('mywidget_v2.txt').read()

and see the changes. Creating or deleting mywidget would be modifying the textview
of the parent, if you were doing it via textview, except that del mywidget.textview
might effectively delete mywidget from the parent. Not sure what would be most useful.

The textview is an alternate and fairly programming-language-agnostic representation
of a GUI design element. Obviously it would not be much of a transformation to convert
to nested python dict representation for the above (and for a python interface to tkinter
that might be better than text). It would not surprise me to find that someone has
done a tkinter walker (maybe it's built into tkinter, I haven't dug) that does something
like this for the read view, but I wonder about the round trip replacement write.

Anyway, I think this kind of programming-language-agnostic representation may be what
Reinhold is getting at, and the "evil" being non-programming-language-agnosticism
in GUI design representation (though textview representation syntax would be a language syntax too ;-)

Using Delphi's conventions might permit interesting interchange with the Delphi world, and I know
there is some Delphi/Python synergy being pursued, though I haven't looked into it, so I'd bet
there is python code somewhere translating between Delphi and tkinter. I just thought of this
textview property to help make my take on Reinhold's post clear, but I could see it making
GUI design interchange in general easier to have a standard representation for that purpose.

XML is too crufty for my taste, but the idea of a very broadly applicable definition of
useful pure abstractions with standard concrete representations appeals to me (I know of ASN ;-)
IMO XML has gotten a place in the world because it works well enough that people
who want to get other work done can't wait for it to be replaced with something better,
not because it's the best thing. Sort of like how MSDOS got its place in the world.

Alternatively, GUI elements could have registrable encode/decode methods with
some kind of UniGUIcode abstract core ;-) I kind of like that, off hand...

Regards,
Bengt Richter


From myles at geocities.com  Thu Apr  7 21:17:43 2005
From: myles at geocities.com (Myles Strous)
Date: 7 Apr 2005 18:17:43 -0700
Subject: oracle interface
In-Reply-To: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <1112923063.176118.275580@g14g2000cwa.googlegroups.com>

cx_Oracle here too (Win32, connecting to Oracle 9).
Thanks, Computronix! (And, of course, thanks to the Python team and
community.)



From james at wrong.nu  Mon Apr 25 08:56:03 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Mon, 25 Apr 2005 13:56:03 +0100
Subject: Multiple tuples for one for statement
In-Reply-To: <200504242020.27440.jstroud@mbi.ucla.edu>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
	<200504242020.27440.jstroud@mbi.ucla.edu>
Message-ID: <200504251356.07715.james@wrong.nu>

On Monday 25 April 2005 04:20, James Stroud wrote:
> for a,b,c in zip(tup1, tup2, tup3):
>    print a
>    print b
>    print c

or just:

for a,b,c in (tup1, tup2, tup3):
    print a
    print b
    print c
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From gandalf at geochemsource.com  Fri Apr  8 02:47:26 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Fri, 08 Apr 2005 08:47:26 +0200
Subject: Parent module idea dropped? [WAS: import statement - package
 visibility problem]
In-Reply-To: <8cf2994e.0504071024.69de669f@posting.google.com>
References: <mailman.1478.1112870310.1799.python-list@python.org>
	<8cf2994e.0504071024.69de669f@posting.google.com>
Message-ID: <425628FE.9080901@geochemsource.com>


>But onto the point you're making. I think its possibly a mis-viewing
>of the package idea in Python. A package creates a name space. If you
>create Lib/Server/Db with all the __init__.py files, its because you
>want to import Lib.Server.Db,  rather than a way of organising your
>source files.
>  
>
I went forward. I read all the documentation in the language reference.

About the import statement:

http://docs.python.org/ref/import.html

For importing packages and using hierarchical module names, there was no 
detailed description but a link to an essay:

http://www.python.org/doc/essays/packages.html

There is a section in that essay named "Intra-package references". It says:

"""The submodules often need to refer to each other. For example, the 
surround module might use the echo module. In fact, such references are 
so common that the import statement first looks in the containing 
package before looking in the standard module search path. Thus, the 
surround module can simply use |import echo| or |from echo import 
echofilter|. If the imported module is not found in the current package 
(the package of which the current module is a submodule), the import 
statement looks for a top-level module with the given name.

When packages are structured into subpackage (as with the Sound package 
in the example), there's no shortcut to refer to submodules of sibling 
packages - the full name of the subpackage must be used. For example, if 
the module Sound.Filters.vocoder needs to use the echo module in the 
Sound.Effects package, it can use |from Sound.Effects import echo|.

(One could design a notation to refer to parent packages, similar to the 
use of ".." to refer to the parent directory in Unix and Windows 
filesystems. In fact, ni supported this using __ for the package 
containing the current module, __.__ for the parent package, and so on. 
This feature was dropped because of its awkwardness; since most packages 
will have a relative shallow substructure, this is no big loss.)
"""

So finally I got the answer: there was a "parent package" feature in the 
ni module but it was dropped of its awkwardness. This is not a big loss 
but this is exatly the feature that I need. Is there a person on this 
list who was against the "parent package" idea? He must know the answer 
or a workaround :-)

-- 

_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From vegeta.z at gmail.com  Tue Apr 19 20:17:23 2005
From: vegeta.z at gmail.com (vegetax)
Date: Tue, 19 Apr 2005 20:17:23 -0400
Subject: poll: does name conventions in python matters?
References: <mailman.2132.1113941497.1799.python-list@python.org>
	<0O6dnQY2MsOZ7vjfRVn-gQ@powergate.ca>
Message-ID: <d446qf$42u$1@sea.gmane.org>

Peter Hansen wrote:

> vegetax wrote:
>> in python it is common to see naming
>> inconsistencies ,methods,modules,packages,classes with names in every
>> posible style:
>> thisisalongmethod
>> ThisIsALongMethod
>> thisIsALongMethod
>> this_is_a_long_method
>> and even This_Is_A_Long_Method
>> All over the place,even within one module!
> 
> You certainly won't find most of those in a single
> module, at least not in the standard library. You
> might find a couple.  

there are some of those inconsistent cases in the stdlib,check the sys
module which mixes a_method with amethod all over the place.

> 
> If you are working with new code and need to choose
> something from scratch, go with your personal preference
> and be consistent.
> 
> If all the above fail, use "names_like_this" or
> "namesLikeThis".  If you really need somebody else
> to tell you what to use: use the latter, because
> I told you to. ;-)
> 
> -Peter

Yes sir! =)
I actually follow the scheme you mentioned,the problem lies when you are
using several of this libs in a module and you have to mix all kind of
naming conventions (including yours) which makes the code less readable.





From mahs at telcopartners.com  Sat Apr  2 20:18:48 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 02 Apr 2005 17:18:48 -0800
Subject: Corectly convert from  %PATH%=c:\\X; "c:\\a; b"  TO  ['c:\\X',
 'c:\\a; b']
In-Reply-To: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>
References: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>
Message-ID: <d2ng99$lnr$1@sea.gmane.org>

chirayuk wrote:
> Hi,
> 
> I am trying to treat an environment variable as a python list - and I'm
> sure there must be a standard and simple way to do so. I know that the
> interpreter itself must use it (to process $PATH / %PATH%, etc) but I
> am not able to find a simple function to do so.
> 
> os.environ['PATH'].split(os.sep) is wrong on Windows for the case when
> PATH="c:\\A;B";c:\\D;
> where there is a ';' embedded in the quoted path.
> 
> Does anyone know of a simple way (addons ok) which would do it in a
> cross platform way? If not - I will roll my own. My search has shown
> that generally people just use the simple split menthod as above and
> leave it there but it seemed like such a common operation that I
> believe there must be a way out for it which I am not seeing.
> 
> Thanks,
> Chirayu.
> 
You may be able to bend the csv module to your purpose:


  >>> test = """\"c:\\A;B";c:\\D;"""
  >>> test1 = os.environ['PATH']
  >>> import csv
  >>> class path(csv.excel):
  ...     delimiter = ';'
  ...     quotechar = '"'
  ...
  >>> csv.reader([test],path).next()
  ['c:\\A;B', 'c:\\D', '']
  >>> csv.reader([test1],path).next()
  ['C:\\WINDOWS\\system32', 'C:\\WINDOWS', 'C:\\WINDOWS\\System32\\Wbem', 
'C:\\Program Files\\ATI Technologies\\ATI Control Panel', 
'C:\\PROGRA~1\\ATT\\Graphviz\\bin', 'C:\\PROGRA~1\\ATT\\Graphviz\\bin\\tools', 
'C:\\WINDOWS\\system32', 'C:\\WINDOWS', 'C:\\WINDOWS\\System32\\Wbem', 
'C:\\Program Files\\ATI Technologies\\ATI Control Panel', 
'C:\\PROGRA~1\\ATT\\Graphviz\\bin', 'C:\\PROGRA~1\\ATT\\Graphviz\\bin\\tools', 
'c:\\python24', 'c:\\python24\\scripts', 'G:\\cabs\\python\\pypy\\py\\bin']
  >>>

HTH
Michael



From dccarson at gmail.com  Wed Apr 13 15:50:03 2005
From: dccarson at gmail.com (dccarson at gmail.com)
Date: 13 Apr 2005 12:50:03 -0700
Subject: smtplib does not send to all recipients
In-Reply-To: <mailman.1715.1113251652.1799.python-list@python.org>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>
	<mailman.1715.1113251652.1799.python-list@python.org>
Message-ID: <1113421803.445281.3660@l41g2000cwc.googlegroups.com>

That seems reasonable.  However, using the 'mail' utility I can deliver
the same mail successfully.  I assume mail is using sendmail under the
covers, which is doing the same negotiation with the same SMTP server?



From fredrik at pythonware.com  Sun Apr 10 08:44:32 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 10 Apr 2005 14:44:32 +0200
Subject: Help understanding code
References: <42591EE2.9040203@verizon.net>
Message-ID: <d3b6ug$aql$1@sea.gmane.org>

Dhruva Hein wrote:

> Hi. I am trying to understand a section of code written for Plone and I
> am having problems understanding the Python syntax in a few of the
> following lines.
>
> I'd be grateful if someone could help me understand what's happening in
> the lines I've marked. I can't see how the dictionary is built or how
> the lists ['bytype'][cytype] make sense in python.
>
> Thanks in advance.
>
> class Stats:
>
>    def getContentTypes(self):
>        """ Returns the number of documents by type """
>        pc = getToolByName(self, "portal_catalog")
>        # call the catalog and loop through the records
>        results = pc()
>                <=== what is the difference between pc and pc()?

pc refers to an object, pc() calls it.  in this case, it looks like pc is
the
portal catalog, and calling the catalog returns the contents.

>        numbers = {"total":len(results),"bytype":{},"bystate":{}} <===
> This is hard to understand

that line creates a dictionary with three members.  you have read the
Python tutorial, right?

the code above is equivalent to:

    numbers = {}
    numbers["total"] = len(results)
    numbers["bytype"] = {}
    numbers["bystate"] = {}

where {} creates a new, empty dictionary.

>        for result in results:
>            # set the number for the type
>            ctype = str(result.Type)
>            num = numbers["bytype"].get(ctype, 0)  <==== where does .get
> come from? and what is the string 'bytype' doing?

"bytype" is a dictionary key, so numbers["bytype"] fetches a
dictionary from the numbers dictionary (see above).

get is a dictionary method; it returns the value corresponding
to the given key (ctype), or a default value (0) if the key does
not exist.  that last line is equivalent to

    temp = numbers["bytype"]
    if temp.has_key(ctype):
        num = temp[ctype]
    else:
        num = 0

>            num += 1
>            numbers["bytype"][ctype] = num    <====== is this some kind
> of an array?

no, it's a dictionary that contains a dictionary.  that line is equi-
valent to

    temp = numbers["bytype"]
    temp[ctype] = num

for more on dictionaries, see the Python tutorial.

>            # set the number for the state
>            state = str(result.review_state)
>            num = numbers["bystate"].get(state, 0)
>            num += 1
>            numbers["bystate"][state] = num
>        return numbers

hope this helps!

</F>





From fredrik at pythonware.com  Thu Apr 14 10:35:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 14 Apr 2005 16:35:59 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com><425e47a9$0$26352$db0fefd9@news.zen.co.uk><mailman.1886.1113479564.1799.python-list@python.org>
	<v4vs51hm5d0jailbuif4m34hjfjoh9028a@4ax.com>
Message-ID: <d3luu4$qp0$1@sea.gmane.org>

> [0] -- btw, in your code, Fredrik:
> """file = open(keycode + ".out", "wb")""".replace("keycode", "filename")

if you do that, decompression won't work.

</F> 





From Sebastien.Boisgerault at gmail.com  Fri Apr 29 11:45:24 2005
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 29 Apr 2005 08:45:24 -0700
Subject: doctest's ELLIPSIS
Message-ID: <1114789524.038880.312510@g14g2000cwa.googlegroups.com>

Hi,

Can anybody come up with a sensible argument that would explain
why the following test should fail ? (Expected: nothing, Got: 42).

cheers,

S.B.

----------------------------------------
#!/usr/bin/env python

import doctest

def test():
    """
    >>> print 42 #doctest: +ELLIPSIS
    ...
    """

def run():
    "Run the test."
    doctest.testmod()

if __name__ == '__main__':
    run()

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



From steven.bethard at gmail.com  Sat Apr  9 19:17:23 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 09 Apr 2005 17:17:23 -0600
Subject: Counting iterations
In-Reply-To: <pan.2005.04.09.18.17.29.903696@dalkescientific.com>
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
	<1113064744.144787.315120@o13g2000cwo.googlegroups.com>
	<pan.2005.04.09.18.17.29.903696@dalkescientific.com>
Message-ID: <o7qdncqf5bcd_8XfRVn-3Q@comcast.com>

Andrew Dalke wrote:
>   "pet#%i" % (i+1)
> 
> (NOTE: most times that's written %d instead of %i)

Any reason to prefer %d over %i? The library reference seems to suggest 
that they're the same thing[1].  I've typically used %i since I can 
remember it from the int type, like I can remember %f from the float 
type.  Is there any reason not to?

STeVe

[1] http://docs.python.org/lib/typesseq-strings.html


From raghulj at gmail.com  Wed Apr  6 09:53:11 2005
From: raghulj at gmail.com (Raghul)
Date: 6 Apr 2005 06:53:11 -0700
Subject: authentication in zope server & Python
In-Reply-To: <1112761222.527651.224740@f14g2000cwb.googlegroups.com>
References: <1112712052.977243.307630@o13g2000cwo.googlegroups.com>
	<1112757783.673823.296330@f14g2000cwb.googlegroups.com>
	<1112761222.527651.224740@f14g2000cwb.googlegroups.com>
Message-ID: <1112795591.463466.77880@z14g2000cwz.googlegroups.com>

I'm sorry



From dmbkiwi at gmail.com  Tue Apr 26 16:39:26 2005
From: dmbkiwi at gmail.com (dumbkiwi)
Date: 26 Apr 2005 13:39:26 -0700
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
Message-ID: <8d7dabda.0504261239.37952804@posting.google.com>

Peter Otten <__peter__ at web.de> wrote in message news:<d4l92e$9di$05$1 at news.t-online.com>...
> Dumbkiwi wrote:
> 
> >> Just encode the data in the target encoding before passing it to
> >> os.popen():
> >> 
> >> test = os.popen('kdialog --inputbox %s' % data.encode("utf-8"))
>  
> > I had tried that, but then the text looks like crap.  The text I'm using
> > for this is Polish, and there are a lot of non-English characters in
> > there. Using this method results in some strange characters - basically it
> > looks like a file encoded in utf-8, but displayed using iso-8859-1.
> > 
> > Is this the best I can do?
> 
> I've just tried the setup you described (with German umlauts instead of
> Polish characters) on my Suse 9.1, and it works as expected with both
> Python 2.3 and 2.4. Perhaps the target encoding you need is not UTF-8. I
> would try other popular encodings used for Polish text (no idea what these
> are). sys.stdout.encoding might give you a clue.
> 
> Peter

Both sys.stdout.encoding and sys.stdin.encoding give:

ANSI_X3.4-1968

which is ascii (I think).

I'd be interested to see what your default encoding is, and why your
output was different.

Anyway, from your post, I've done some more digging, and found the
command:

sys.setappdefaultencoding()

which I've used, and it's fixed the problem (I think).

Thanks for your help.

Matt


From mwm at mired.org  Sun Apr 24 03:26:28 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 24 Apr 2005 02:26:28 -0500
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net> <426B27C1.4000907@cloudthunder.com>
	<mailman.2383.1114322077.1799.python-list@python.org>
Message-ID: <86hdhwr5y3.fsf@guru.mired.org>

Robert Kern <rkern at ucsd.edu> writes:
>> Could I honestly argue this to him? From what basis do I argue that
>> it is not an equation?
>
> It's his responsibility to show that it *is* an equation.
>
> x = x + 1
>
> Equation? I think not.

I think it is. One equation in one unknown. The solution set for x is
{}.

As a logical equation, it has the value false (just like 0 = 1).

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From bokr at oz.net  Sat Apr 23 23:44:36 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 24 Apr 2005 03:44:36 GMT
Subject: Bounding box on clusters in a 2D list
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
Message-ID: <426b0f51.369660724@news.oz.net>

On 23 Apr 2005 13:17:55 -0700, "superprad at gmail.com" <superprad at gmail.com> wrote:

>If I have
>
>ex: x = [[1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0],
>         [1,1,1,0,1,1,0,0,0,0,0,1,1,1,1,0,0,0],
>         [1,1,1,0,1,1,1,0,1,1,0,1,1,1,0,0,0,0],
>         [0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0]]
>what I want is a boundingbox over the region where we find clusters of
>1's.So for instance in the above list first 3 roes and colums have 1's
>so the area of that box is 3x3
>so my final array should have an array of approx areas of clusters of
>1's like
>area = [ 9,4 ....]
Where does the 4 come from?

>Hope I am clear with my question.
>
Not quite clear on if "clusters" have to be rectangular and fill their bounding boxes
or whether

    [[0, 0, 0, 0, 0],
        +-----+
     [0,|1, 1,|0, 0],
        |     |
     [0,|0, 1,|0, 0],
        +-----+
     [0, 0, 0, 0, 0]]

is a cluster with three 1's. Or indeed whether "bounding boxes" have to be rectangular.
I.e., what about diagonal clusters?
           ,__,
    [[0, 0,|1,|0, 0],
         _/ _/   ,__, 
     [0,/1,/0, 0,|1],
      _/ _/    _/ /
     [1,/0, 0,/1,/0],
            _/ /
     [0, 0,/1,/0, 0]]

Or should that be
      +-------------+
    [[|0, 0, 1, 0, 0|],
      |             |
     [|0, 1, 0, 0, 1|],
      |             |
     [|1, 0, 0, 1, 0|],
      |             |
     [|0, 0, 1, 0, 0|]]
      +-------------+

since two 3x3 squares around the length-3 diagonals would overlap.

Regards,
Bengt Richter


From vze4rx4y at verizon.net  Wed Apr  6 20:54:03 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 07 Apr 2005 00:54:03 GMT
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
Message-ID: <Lw%4e.51$nt3.47@trndny04>

[RickMuller]
> I have to sort a list, but in addition to the sorting, I need to
> compute a phase factor that is +1 if there is an even number of
> interchanges in the sort, and -1 if there is an odd number of
> interchanges.

It occurs to me that the previously posted comparison count won't do it.

The only idea that comes to mind is to do a selection sort and count the number
of swaps.

a = [1,10,2,7]
parity = 1
for i in xrange(len(a)-1):
    x = a[i]
    lowest = i
    for j in xrange(i, len(a)):
        if a[j] < a[lowest]:
            lowest = j
    if i != lowest:
        a[i], a[lowest] = a[lowest], a[i]
        parity = -parity
        print 'swapping %d with %d.  parity is %d' % (i, lowest, parity)
print parity, a


Raymond




From pinard at iro.umontreal.ca  Sun Apr 24 09:59:26 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Sun, 24 Apr 2005 09:59:26 -0400
Subject: Rudeness on this list [Re: rudeness was: Python licence again]
In-Reply-To: <d4fte8$sa1$1@gemini.csx.cam.ac.uk>
References: <mailman.2308.1114200498.1799.python-list@python.org>
	<d4fte8$sa1$1@gemini.csx.cam.ac.uk>
Message-ID: <20050424135926.GA24384@phenix.progiciels-bpi.ca>

[Michael Hoffman]
> Michael.Coll-Barth at VerizonWireless.com wrote:

> >I started to read the postings on this list and was dismayed at the
> >depth of rudeness on here.

> I saw no evidence of rudeness whatsoever. [...]

It may be related to cultural differences, who knows.  Some people are
sensible to rude behaviour or language, while others just do not notice:
I might guess they grew and learned to live in such environments.

As seen from here, the Python mailing list quality has been degrading
significantly for the last half-year or so.  It is a bit unavoidable as
Python gains popularity and attracts people of all obediences.

One helping attitude, for everybody, would be to remember that we have
readers from everywhere on this planet, and that softness and politeness
is probably a good common denominator for people to be happy on the
average.  If you happen to live in a harsh country, best is to become
conscious of the difference, and try to respect others.

Do you remember those years when Tim Peters was our effective softening
device?  The list was then one of the nicest place one can be.  After
a few polite replies, abusive people were generally ignored by all
members, and even institutional flamers were getting discouraged by the
lack of fuel, eventually leaving for elswehere.  Nice times indeed! :-).

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From steven.bethard at gmail.com  Wed Apr 20 19:41:15 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 20 Apr 2005 17:41:15 -0600
Subject: inner sublist positions ?
In-Reply-To: <9468aec7.0504201354.7e6d84cf@posting.google.com>
References: <9468aec7.0504201354.7e6d84cf@posting.google.com>
Message-ID: <-NKdnTppfvQEdfvfRVn-3A@comcast.com>

Bernard A. wrote:
> hello, 
> 
> while trying to play with generator, i was looking for an idea to get
> the position of a inner list inside another one, here is my first idea
> :
> - first find position of first inner element, 
> - and then see if the slice starting from here is equal to the inner
> ->
> 
>>>>def subPositions(alist, innerlist):
> 
> 	if innerlist == []:
> 		return
> 	first, start = innerlist[0], 0
> 	while 1:
> 		try:
> 			p = alist[start:].index(first)
> 		except ValueError:
> 			break # or should i better use return ?
> 		start = start + p		
> 		if alist[start: start + len(innerlist)] == innerlist:
> 			yield start, start + len(innerlist)
> 		start += 1
> 
> 		
> 
>>>>list(subPositions(range(5) + range(5), [2,3]))
> 
> [(2, 4), (7, 9)]
> 
> maybe have you some better / faster ideas / implementations ? or even
> a more pythonic to help me learning that

I don't know if this is any faster, but you could try:

py> def indexes(lst, sublist):
...     sublen = len(sublist)
...     for i in range(len(lst)):
...         if lst[i:i+sublen] == sublist:
...             yield i, i+sublen
...
py> list(indexes(range(5) + range(5), [2, 3]))
[(2, 4), (7, 9)]

Use the timeit module to see if it's any faster.  Also, in your version 
you should probably use
     p = alist.index(first, start)
instead of
     p = alist[start:].index(first)
so you don't make so many new lists.

STeVe


From noway at sorry.com  Sat Apr 16 12:50:07 2005
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 16 Apr 2005 16:50:07 GMT
Subject: Dr Dobbs "with" keyword
References: <MPG.1ccb07fd51e023b098968c@news-server>
Message-ID: <3nb8e.49265$IN.877052@twister2.libero.it>

Neil Hodgson wrote:

>    In the March 2005 issue of Dr Dobbs Journal there is an article
> "Resource Management in Python" by Oliver Schoenborn. One paragraph
> (first new paragraph, page 56) starts "Starting with Python 2.4, a new
> type of expression lets you use the keyword /with/". It continues,
> mentioning PEP 310 (Reliable Acquisition/Release Pairs) which is at
> "Draft" status and unlikely to be accepted with the keyword "with" as
> Guido wants to use that for another purpose.

Whatever keyword is chosen, I hope PEP 310 eventually hit Python, I have been
awaiting it for a long time. I would also like to have a builtin resource()
like this:

def resource(enter_call, exit_call):
   class Res(object):
      __enter__ = lambda self: enter_call()
      __exit__ = lambda self: exit_call()
   return Res()

with resource(self.mutex.lock, self.mutex.unlock):
    pass

Either that, or "with" could call adapt() implicitly so I can register my
conversion functions.
-- 
Giovanni Bajo




From steve at holdenweb.com  Thu Apr 21 06:06:27 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 06:06:27 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <1114003997.778676.144950@z14g2000cwz.googlegroups.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>	<_Lm9e.23143$Xm3.17864@trndny01>	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
Message-ID: <d47tmo$h4r$1@sea.gmane.org>

beliavsky at aol.com wrote:
> Terry Hancock wrote:
> 
> <snip>
> 
>>So I like Python's slicing because it "bites *less*" than intervals
> 
> in C or Fortran.
> 
> I disagree. Programming languages should not needlessly surprise
> people, and a newbie to Python probably expects that x[1:3] =
> [x[1],x[2],x[3]] . Array-oriented languages, such as Fortran 90/95,
> Matlab/Octave/Scilab, and S-Plus/R do not follow the Python convention,
> and I don't know of Fortran or R programmers who complain (don't follow
> Matlab enough to say). There are Python programmers, such as the OP and
> me, who don't like the Python convention. What languages besides Python
> use the Python slicing convention?
> 
The principle of least surprise is all very well, but "needless surprise 
of newbies" is a dangerous criterion to adopt for programming language 
design and following it consistently would lead to a mess like Visual 
Basic, which grew by accretion until Microsoft realized it was no longer 
tenable and broke backward compatibility.

> Along the same lines, I think the REQUIREMENT that x[0] rather than
> x[1] be the first element of list x is a mistake. At least the
> programmer should have a choice, as in Fortran or VBA. In C starting at
> 0 may be justified because of the connection between array subscripting
> and pointer arithmetic, but Python is a higher-level language where
> such considerations are less relevant.
> 
But Pythonicity required that there should be one obvious way to do 
something. How obvious is having two ways? Then when you read code you 
would continually be asking yourself "is this a one-based or a 
zero-based structure?", which is not a profitable use of time.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From a.r.ferreira at gmail.com  Mon Apr 25 08:23:28 2005
From: a.r.ferreira at gmail.com (Adriano Ferreira)
Date: Mon, 25 Apr 2005 09:23:28 -0300
Subject: Squezing in replacements into strings
In-Reply-To: <d4in0e$d7s$03$1@news.t-online.com>
References: <mailman.2446.1114430162.1799.python-list@python.org>
	<d4in0e$d7s$03$1@news.t-online.com>
Message-ID: <73ddeb6c0504250523453333be@mail.gmail.com>

As Peter Otten said, sub() is probably what you want. Try:

---------------------------------------------------
import re

def _ok(matchobject):
    # more complicated stuff happens here
    return 1

def _massage(word):
    return "_" + word + "_"


def _massage_or_not(matchobj):
    if not _ok(matchobj):
        return matchobj.group(0) 
    else:
        word = matchobj.group(0)
        return _massage(word)


text = "don't allow the fuck swear word"
    
rtext = re.sub(r'fuck', _massage_or_not, text)
print rtext
---------------------------------------------------

No need to hassle with the changing length of the replaced string.

Best regards,
Adriano.


From steve at holdenweb.com  Tue Apr 26 05:36:07 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 05:36:07 -0400
Subject: regex over files
In-Reply-To: <426E021E.8000809@jessikat.fsnet.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk><426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
Message-ID: <d4l1o8$65v$1@sea.gmane.org>

Robin Becker wrote:
> Richard Brodie wrote:
> 
>> "Robin Becker" <robin at reportlab.com> wrote in message
>> news:mailman.2469.1114444689.1799.python-list at python.org...
>>
>>> Gerald Klix wrote:
>>>
>>>> Map the file into RAM by using the mmap module.
>>>> The file's contents than is availabel as a seachable string.
>>>>
>>>
>>> that's a good idea, but I wonder if it actually saves on memory? I 
>>> just tried
>>> regexing through a 25Mb file and end up with 40Mb as working set (it 
>>> rose
>>> linearly as the loop progessed through the file). Am I actually 
>>> saving anything
>>> by not letting normal vm do its thing?
>>
>>
>>
>> You aren't saving memory in that sense, no. If you have any RAM spare the
>> file will end up in it. However, if you are short on memory though, 
>> mmaping the
>> file gives the VM the opportunity to discard pages from the file, 
>> instead of paging
>> them out. Try again with a 25Gb file and watch the difference ;) YMMV.
>>
>>
> 
> :)
> 
> So we avoid dirty page writes etc etc. However, I still think I could 
> get away with a small window into the file which would be more efficient.

I seem to remember that the Medusa code contains a fairly good 
overlapped search for a terminator string, if you want to chunk the file.

Take a look at the handle_read() method of class async_chat in the 
standard library's asynchat.py.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From dalke at dalkescientific.com  Sat Apr 30 13:02:16 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Sat, 30 Apr 2005 17:02:16 GMT
Subject: lists in cx_Oracle
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <pan.2005.04.30.17.02.16.988085@dalkescientific.com>

A while back I asked about which Oracle client to use for
MS Windows.  Turns out I also needed one for unix so I followed
people's advice and installed cx_Oracle.

I want to execute a query with an "IN" in the WHERE clause
and with the parameter taken from a Python variable.  That
is, I wanted something like this to work

id_list = ["AB001", "AB002", "AB003"]

c.execute("""SELECT s.smiles FROM smiles_database s WHERE """
         """  s.id IN :id_list""", id_list = id_list)

I couldn't get it to work.  It complained

    arrays can only be bound to PL/SQL statements

I tried looking at the source code but couldn't figure out
how to do this.  In no small part due to my nearly complete
lack of experience with Oracle or for that matter SQL databases.

My solution was to build a new string to executed but it
wasn't pretty and I needed to explain to my client about
SQL injection; wanted to use repr(a_tuple) which was *almost*
correct.

How do I do what I want to do?

				Andrew
				dalke at dalkescientific.com



From bj_666 at gmx.net  Mon Apr  4 18:19:09 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 05 Apr 2005 00:19:09 +0200
Subject: Changing TEXT color from python
References: <1112644779.486105.179240@l41g2000cwc.googlegroups.com>
	<mailman.1316.1112645526.1799.python-list@python.org>
Message-ID: <pan.2005.04.04.22.19.05.461271@gmx.net>

In <mailman.1316.1112645526.1799.python-list at python.org>, Heiko Wundram
wrote:

> Am Montag, 4. April 2005 21:59 schrieb GujuBoy:
>> how can i do this...and hopefully without including any external
>> modules.
> 
> It depends.
> 
> Under *NIX, have a look at the curses module.
> 
> Under Windows, Google for ANSI.SYS and read up on Escape Sequences, or check 
> out the curses for Windows implementation that's floating around somewhere on 
> the net, I don't know the URL.

At least under Linux the ANSI color escapes should work too.  Out of the
box.

Ciao,
	Marc 'BlackJack' Rintsch


From bvande at po-box.mcgill.ca  Wed Apr 20 13:08:38 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Wed, 20 Apr 2005 13:08:38 -0400
Subject: building a small calculator
In-Reply-To: <1114000897.084753.80950@l41g2000cwc.googlegroups.com>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
	<mailman.2168.1113999910.1799.python-list@python.org>
	<1114000275.227950.50870@f14g2000cwb.googlegroups.com>
	<mailman.2171.1114000794.1799.python-list@python.org>
	<1114000897.084753.80950@l41g2000cwc.googlegroups.com>
Message-ID: <42668C96.7090309@po-box.mcgill.ca>

aleksander.helgaker at gmail.com said unto the world upon 2005-04-20 08:41:
> Sorry. This is my first day using Python.
> 
> Is there an equivelent to the goto command? I want to find some way to
> take the user back to the main menu.
> 


When I first started learning Python some long time after having done 
some BASIC, I found the lack of goto a puzzle, too. You'll get over it :-)

Looking at the code from your original post, you just have a linearly 
ordered list of statements, with very little structure. It is much 
easier to control program flow in Python if you employ functions.

Keeping in mind that this is a sketch, and I am no expert on Python, 
but a hobbyist, try changing it so it is more like this pseudo-code

def print_intro():
     # intro display logic here

def prompt_user():
     # menu display and input fetching logic here

def rectangle_stuff():
     # etc.

def circle_stuff():
     #

etc.

then,

def main():
     while True:
         prompt_user()
         # logic to do the right thing with the input goes here
         # there are better ways, but as a first go, you could use
         # if user_input_value == '1':
         #     rectangle_stuff()
         # etc
         if user_input_value == quit_value:
             break # or call an exit function to do other stuff on exit

Fill out those functions, and call them in the appropriate order, and 
the main function will continue to prompt the user, do what's wanted, 
and repeat until the user enters the menu option for quiting. (Once 
again, a rough first approximation.)

I'd second the recommendation you received to check out the Tutor list 
-- both lists are friendly, but Tutor is perhaps better geared to the 
level of explanation that you might find most helpful in these early 
stages.

Best,

Brian vdB




From ny_r_marquez at yahoo.com  Tue Apr 19 11:39:29 2005
From: ny_r_marquez at yahoo.com (RM)
Date: 19 Apr 2005 08:39:29 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <1113922611.915845.256360@o13g2000cwo.googlegroups.com>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
	<1113830286.364709.164740@z14g2000cwz.googlegroups.com>
	<slrnd69cu7.1ab.klaus@main.szn.dk>
	<1113922611.915845.256360@o13g2000cwo.googlegroups.com>
Message-ID: <1113925169.076737.41010@g14g2000cwa.googlegroups.com>

I get odd results when trying to use exponents.  For example:

>>>4^2
6



From programmer.py at gmail.com  Mon Apr 11 08:52:02 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Mon, 11 Apr 2005 07:52:02 -0500
Subject: Weird...
In-Reply-To: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>
References: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>
Message-ID: <d52c72d2050411055269ce40fb@mail.gmail.com>

Dictionary keys have no defined order.  This is what the docs say about that:

Keys and values are listed in random order. If items(), keys(),
values(), iteritems(), iterkeys(), and itervalues() are called with no
intervening modifications to the dictionary, the lists will directly
correspond.

jw

On Apr 10, 2005 4:57 PM, Joshua Ginsberg <listspam at flowtheory.net> wrote:
>  >>> {'a':1,'b':'2','c':[3,4]}.keys()
> ['a', 'c', 'b']
> 
> How come? :-)
> 
> -jag
> 
> Python 2.3.3 (#1, May  7 2004, 10:31:40)
> [GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
> 
> 
> 
> Joshua Ginsberg -- joshg at brainstorminternet.net
> Brainstorm Internet Network Operations
> 970-247-1442 x131
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
>


From bearophileHUGS at lycos.com  Thu Apr  7 13:44:49 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 7 Apr 2005 10:44:49 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <7xvf6yzflz.fsf@ruckus.brouhaha.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mailman.1479.1112871689.1799.python-list@python.org>
	<7xvf6yzflz.fsf@ruckus.brouhaha.com>
Message-ID: <1112895889.525655.128540@o13g2000cwo.googlegroups.com>

Tim's solution is very nice, it comes from basic things often taught in
good computer science courses.

In Python when you have to do many (-1)**n you can do:
(1-2*(n%2))
This seems quite faster.

Bearophile



From bedouglas at earthlink.net  Tue Apr 12 16:04:19 2005
From: bedouglas at earthlink.net (bruce)
Date: Tue, 12 Apr 2005 13:04:19 -0700
Subject: python/svn issues....
In-Reply-To: <qnkpswzye0q.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <003101c53f9a$d164e110$0301a8c0@Mesa.com>

david...

thanks for the reply...

it's starting to look as though the actual /usr/lib/libdb-4.2.so from the
rpm isn't exporting any of the symbols...

when i do:
nm /usr/lib/libdb-4.2.so | grep db_create

i get
 nm: /usr/lib/libdb-4.2.so: no symbols

which is strange... because i should be getting the db_create symbol...

i'll try to build berkeley db by hand and see what i get...

if you could try the 'nm' command against your berkely.. i'd appreciate you
letting me know what you get..

thanks

bruce



-----Original Message-----
From: python-list-bounces+bedouglas=earthlink.net at python.org
[mailto:python-list-bounces+bedouglas=earthlink.net at python.org]On Behalf
Of David M. Cooke
Sent: Tuesday, April 12, 2005 12:46 PM
To: python-list at python.org
Subject: Re: python/svn issues....


"bruce" <bedouglas at earthlink.net> writes:

> hi...
>
> in trying to get viewcvs up/running, i tried to do the following:
>
> [root at lserver2 viewcvs-0.9.2]# python
> Python 2.3.3 (#1, May  7 2004, 10:31:40)
> [GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import svn.repos
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File
>
"/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
> /svn/repos.py", line 19, in ?
>   File
>
"/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
> /svn/fs.py", line 28, in ?
>   File
>
"/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
> /libsvn/fs.py", line 4, in ?
> ImportError: /usr/lib/libsvn_fs_base-1.so.0: undefined symbol: db_create

This looks like a problem when Subversion was built: this library was
not linked against the Berkeley DB libraries.

You can check what's linked using ldd, and see the unresolved symbols
with ldd -r. For instance, on my AMD64 Debian system,

$ ldd -r /usr/lib/libsvn_fs_base-1.so.0
        libsvn_delta-1.so.0 => /usr/lib/libsvn_delta-1.so.0
(0x0000002a95696000)
        libsvn_subr-1.so.0 => /usr/lib/libsvn_subr-1.so.0
(0x0000002a9579f000)
        libaprutil-0.so.0 => /usr/lib/libaprutil-0.so.0 (0x0000002a958c8000)
        libldap.so.2 => /usr/lib/libldap.so.2 (0x0000002a959e0000)
        liblber.so.2 => /usr/lib/liblber.so.2 (0x0000002a95b19000)
        libdb-4.2.so => /usr/lib/libdb-4.2.so (0x0000002a95c27000)
        libexpat.so.1 => /usr/lib/libexpat.so.1 (0x0000002a95e05000)
        libapr-0.so.0 => /usr/lib/libapr-0.so.0 (0x0000002a95f29000)
        librt.so.1 => /lib/librt.so.1 (0x0000002a9604e000)
        libm.so.6 => /lib/libm.so.6 (0x0000002a96155000)
        libnsl.so.1 => /lib/libnsl.so.1 (0x0000002a962dc000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x0000002a963f2000)
        libc.so.6 => /lib/libc.so.6 (0x0000002a96506000)
        libdl.so.2 => /lib/libdl.so.2 (0x0000002a96746000)
        libcrypt.so.1 => /lib/libcrypt.so.1 (0x0000002a96849000)
        libresolv.so.2 => /lib/libresolv.so.2 (0x0000002a9697c000)
        libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x0000002a96a91000)
        libgnutls.so.11 => /usr/lib/libgnutls.so.11 (0x0000002a96ba8000)
        /lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
(0x000000552aaaa000)
        libtasn1.so.2 => /usr/lib/libtasn1.so.2 (0x0000002a96d1b000)
        libgcrypt.so.11 => /usr/lib/libgcrypt.so.11 (0x0000002a96e2b000)
        libgpg-error.so.0 => /usr/lib/libgpg-error.so.0 (0x0000002a96f77000)
        libz.so.1 => /usr/lib/libz.so.1 (0x0000002a9707b000)

If it doesn't look like that, then I'd say your Subversion package was
built badly. You may also want to run ldd on your svn binary, to see what
libraries it pulls in.

--
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca
--
http://mail.python.org/mailman/listinfo/python-list



From paul at boddie.org.uk  Fri Apr 15 03:27:47 2005
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Apr 2005 00:27:47 -0700
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
References: <d3ekhf$a0f$1@lairds.us>
	<3c670tF6jdeqrU1@individual.net>	<lMKdnShsStt_68PfRVn-3g@powergate.ca>
	<mailman.1897.1113487849.1799.python-list@python.org>
Message-ID: <5339b60d.0504142327.472a6f4d@posting.google.com>

Simon Brunning <simon.brunning at gmail.com> wrote in message news:<mailman.1897.1113487849.1799.python-list at python.org>...
> On 4/14/05, Peter Hansen <peter at engcorp.com> wrote:
> > Greg Ewing wrote:
> > > (Darn. I finally say something that gets into Quote of the
> > > Week, and it's attributed to someone else! :-) :-) :-)
> >
> > +1 on this for meta-QOTW, solving both problems...
> 
> Yeah, but to whom do I attribute it?

To Greg, of course. ;-)

Paul


From antonyliu2002 at yahoo.com  Tue Apr 19 22:13:13 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Tue, 19 Apr 2005 19:13:13 -0700 (PDT)
Subject: Importing some functions from a py file
Message-ID: <20050420021313.34955.qmail@web54509.mail.yahoo.com>

Hi,

I think I got confused by the python import facility.

Say, in code1.py I have func1, func2, func3 and main.

In code2.py, I *only* want to use func2 from code1.py.

So, I did

from code1 import func2

But every time, I run code2.py, the main() of code1.py
is run.

I don't know why.  Any hint please?  Thanks.

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From thegrizzzly at yahoo.com  Wed Apr 13 17:25:44 2005
From: thegrizzzly at yahoo.com (Raffi)
Date: 13 Apr 2005 14:25:44 -0700
Subject: Web Application Client Module
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
	<d3igum$tui$1@garrison.globalnet.hr>
Message-ID: <1113427544.186222.273010@g14g2000cwa.googlegroups.com>


Berislav Lopac wrote:
> Raffi wrote:
> > Hi All,
> >
> > I hope I'm posting this question to the correct newsgroups. We have
a
> > web based database application that's accessed using IE. The
> > application opens a popup window to run in. With all the popup
> > blockers and compromised browsers out there, I'm looking into
> > developing a web based custom client side application to access the
> > application with. The application will be developed to only reach
the
> > web application site using the https protocol. It also needs to
> > javascript enabled. It will be downloaded from the main web site
and
> > used to access the database application.
> >
> > Any suggestions/ideas on how to go about developing the client
> > application? What tools tools are out there for such a project.
>
>
http://msdn.microsoft.com/library/default.asp?url=/workshop/author/hta/hta_node_entry.asp

Thanks for the suggestions. They'll give me the starting point I need.

Raffi



From martin.witte at gmail.com  Sat Apr  9 19:02:11 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 9 Apr 2005 16:02:11 -0700
Subject: python modules in home dir
In-Reply-To: <8416c258.0504091309.7ba2047d@posting.google.com>
References: <8416c258.0504091309.7ba2047d@posting.google.com>
Message-ID: <1113086535.508461.79970@l41g2000cwc.googlegroups.com>

set the PYTHON_PATH to include your home directory



From snoylr at cheqnet.net  Fri Apr 15 18:12:00 2005
From: snoylr at cheqnet.net (Richard Lyons)
Date: Fri, 15 Apr 2005 17:12:00 -0500
Subject: Glade for Windows and Python
Message-ID: <Pr2dnYstzcxopv3fRVn-oQ@bright.net>

Has anyone been successful in using Glade for Windows with Python?


From valinor at linuxmail.org  Thu Apr  7 12:17:35 2005
From: valinor at linuxmail.org (foten)
Date: 7 Apr 2005 09:17:35 -0700
Subject: Problems extracting attachment from email
Message-ID: <cf4db78a.0504070817.3c776e07@posting.google.com>

Hi community,

This is the task I'm struggling with:
- A user sends me an email with the subject '*****3gp*****'
  including an attached .3gp-file.
- I then fetch that email, extracts the attachement and stores
  it localy as a file.
- I then run a python-script that parses the stored file
  and generates an excel-file with statistics of that file
  at a shared driver.
  
I'm using getmail (http://pyropus.ca/software/getmail/)
(running on cygwin with cygwin python 2.4)
and the filter function provided to fetch my mail. getmail
starts my filter script and the mail is send using stdin.

I then read from stdin using
        sys.stdin.read()
and the message is stored locally. The content of this stored file
is exactly the same as the mail sent to me.

I then parse that message using
        fp = open(tmp_file,'rb')
        p = email.Parser.Parser()

The problem I'm having is when I'm trying to extract the
attachement using
        f=open(Filename, "wb")
        f.write(msg.get_payload(decode=1))
        f.close()
Not the whole message is decoded and stored!
When only trying
        f.write(msg.get_payload())
I see that the last 255 bytes are missing.

How is this possible, I receive every last byte from stdin?

I then tried calling my windows python installation (2.4) instead of
the cygwin thingie, but that didn't work either.

Doing this using IDLE for windows or a cmdprompt for cygwin works
great!

Any ideas 'bout what I'm doing wrong here?

cheers

//Fredrik


From spam4bsimons at yahoo.ca  Sun Apr  3 17:12:48 2005
From: spam4bsimons at yahoo.ca (Brendan)
Date: 3 Apr 2005 14:12:48 -0700
Subject: Help me dig my way out of nested scoping
Message-ID: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>

Hi everyone

I'm new to Python, so forgive me if the solution to my question should
have been obvious.  I have a function, call it F(x), which asks for two
other functions as arguments, say A(x) and B(x).  A and B are most
efficiently evaluated at once, since they share much of the same math,
ie, A, B = AB(x), but F wants to call them independantly (it's part of
a third party library, so I can't change this behaviour easily).   My
solution is to define a wrapper function FW(x), with two nested
functions,  AW(x) and BW(x), which only call AB(x) if x has changed.

To make this all clear, here is my (failed) attempt:

#------begin code ---------

from ThirdPartyLibrary import F
from MyOtherModule import AB

def FW(x):
    lastX = None
    aLastX = None
    bLastX = None

    def AW(x):
        if x != lastX:
            lastX = x
            # ^ Here's the problem.  this doesn't actually
            # change FW's lastX, but creates a new, local lastX

            aLastX, bLastX = AB(x)
        return aLastX

    def BW(x):
        if x != lastX:
            lastX = x
            # ^ Same problem

            aLastX, bLastX = AB(x)
        return bLastX

    #finally, call the third party function and return its result
    return F(AW, BW)

#-------- end code ---------

OK, here's my problem:  How do I best store and change lastX, A(lastX)
and B(lastX) in FW's scope?  This seems like it should be easy, but I'm
stuck.  Any help would be appreciated!

  -Brendan
--
Brendan Simons



From aahz at pythoncraft.com  Thu Apr  7 17:19:30 2005
From: aahz at pythoncraft.com (Aahz)
Date: 7 Apr 2005 14:19:30 -0700
Subject: How to name Exceptions that aren't Errors
References: <3blfl8F6gt80jU1@individual.net>
Message-ID: <d34852$lk1$1@panix3.panix.com>

In article <3blfl8F6gt80jU1 at individual.net>,
Leo Breebaart  <leo at lspace.org> wrote:
>
>My question is twofold. First, I know that many programmers are
>violently opposed to using exceptions in this fashion, i.e. for
>anything other than, well, exceptional circumstances. But am I correct
>in thinking that in Python this usage is actually considered quite
>normal, and not frowned upon? Is my snippet above indeed sufficiently
>Pythonic?

Consider the use of StopIteration for ``for`` loops, and you will be
Enlightened.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From gaudetteje at gmail.com  Fri Apr  1 06:26:06 2005
From: gaudetteje at gmail.com (NavyJay)
Date: 1 Apr 2005 03:26:06 -0800
Subject: __init__ method and raising exceptions
In-Reply-To: <4G43e.540$bI3.55452@monger.newsread.com>
References: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
	<4G43e.540$bI3.55452@monger.newsread.com>
Message-ID: <1112354766.921997.192530@g14g2000cwa.googlegroups.com>

Exactly the answer I was looking for!  12 hours of straight programming
tends to fog ones mind.  Thanks for making it clear!

Jay



From vze4rx4y at verizon.net  Tue Apr 12 23:41:25 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Wed, 13 Apr 2005 03:41:25 GMT
Subject: Why does StringIO discard its initial value?
References: <XEb6e.556$Cz3.49700@monger.newsread.com>
	<g9m6e.6295$ff4.1793@trndny08> <d3g36e$4oh$1@ctb-nnrp2.saix.net>
Message-ID: <Fx07e.12389$Xm3.8777@trndny01>

[David Fraser]
> Others may find this helpful ; it's a pure Python wrapper for cStringIO
> that makes it behave like StringIO in not having initialized objects
> readonly. Would it be an idea to extend cStringIO like this in the
> standard library? It shouldn't lose performance if used like a standard
> cStringIO, but it prevents frustration :-)

IMO, that would be a step backwards.  Initializing the object and then
writing to it is not a good practice.  The cStringIOAPI needs to be as
file-like as possible.  With files, we create an emtpy object and then
starting writing (the append mode for existing files is a different story).
Good code ought to maintain that parallelism so that it is easier to
substitute a real file for a writeable cStringIO object.

This whole thread (except for the documentation issue which has been
fixed) is about fighting the API rather than letting it be a guide to good
code.

If there were something wrong with the API, Guido would have long
since fired up the time machine and changed the timeline so that all
would be as right as rain ;-)


Raymond Hettinger




From peufeu at free.fr  Tue Apr 12 20:54:08 2005
From: peufeu at free.fr (peufeu at free.fr)
Date: Wed, 13 Apr 2005 02:54:08 +0200
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>
	<u9io519uc5upv93l6sd8ssddbhdi50a41f@4ax.com>
	<1113340181.174797.132250@f14g2000cwb.googlegroups.com>
Message-ID: <op.so5bgiajpda12i@localhost>


	I sympathize with you and also think there should be an "add comment" in  
the Python documentation website, so that users could post their code  
snippets in the relevant places.



> I found the Howto through Google. Somehow I didn't see that link in the
> documentation.
>
> And please do not make any assumptions about my  reading of manuals.
>



From pitonero at gmail.com  Tue Apr  5 22:28:55 2005
From: pitonero at gmail.com (El Pitonero)
Date: 5 Apr 2005 19:28:55 -0700
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<4252fec3@nntp0.pdx.net>
Message-ID: <1112754535.800594.127430@g14g2000cwa.googlegroups.com>

Scott David Daniels wrote:
> Ron_Adam wrote:
> > ...
>
>      def tweakdoc(name):
>          def decorator(function):
> 	    function.__doc__ = 'Tweak(%s) %r' % (name, function.__doc__)
> 	    return function
>          return decorator
>
> What is confusing us about what you write is that you are referring
to
> tweakdoc as a decorator, when it is a function returning a decorator.

"Decorator factory" would be a shorter name for "a function returning a
decorator".



From n.20.e5ke at spamgourmet.com  Thu Apr 21 19:34:46 2005
From: n.20.e5ke at spamgourmet.com (Esben Pedersen)
Date: Fri, 22 Apr 2005 01:34:46 +0200
Subject: Persistent python object and the Web
In-Reply-To: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
References: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
Message-ID: <426838c9$0$79453$14726298@news.sunsite.dk>

ramon.aragues at gmail.com wrote:
> My problem is that I don't know how to create a graph_object that
> remains persistent through time (it has to be the same graph_object for

One possibility is to have a remote procedure call server that stores 
the graph running seperately from your wab application.

Your web application then simply calls the rpc which is running in a 
seperate process which gives you the persistence.

A good choice is the xmlrpc module in the standard python distribution, 
which makes it simple to comunicate between processes.

/Esben


From newsgroups at jhrothjr.com  Fri Apr  1 08:40:34 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 1 Apr 2005 07:40:34 -0600
Subject: Showing errors explicitly in try... except
References: <1112354356.092391.238710@f14g2000cwb.googlegroups.com>
Message-ID: <114qjt55v0opd2e@news.supernews.com>


"Harlin Seritt" <harlinseritt at yahoo.com> wrote in message 
news:1112354356.092391.238710 at f14g2000cwb.googlegroups.com...
> When using try... except... errors don't show up. Is there a way to
> force stderr despite using try...except?

If you're looking for stack traces, look at the inspect and
traceback modules. They contain the tools to do just
about anything you need for error reporting. Also there
is a logger module somewhere so you can put the stuff
somewhere permanent if you want.

John Roth

>
> thanks,
>
> Harlin Seritt
> 



From farcepest at gmail.com  Thu Apr  7 14:39:47 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 7 Apr 2005 11:39:47 -0700
Subject: Python & MySQL
In-Reply-To: <1112712443.051520.25660@g14g2000cwa.googlegroups.com>
References: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
	<1112712443.051520.25660@g14g2000cwa.googlegroups.com>
Message-ID: <1112899187.613336.31390@f14g2000cwb.googlegroups.com>

jason.massey at gmail.com wrote:
> Okay,
>
> I had the brilliant idea right after posting to google the newsgroups
> on this.
>
> db = MySQLdb.connect(user=database_user,passwd=database_password)
>
> db.autocommit(True)   <--- One little line!

You would be better off executing db.commit() periodically (at the end
of your transaction).



From gen2n at seznam.cz  Mon Apr  4 04:43:11 2005
From: gen2n at seznam.cz (pavel.kosina)
Date: Mon, 04 Apr 2005 10:43:11 +0200
Subject: Tkinter - pixel or widget color
Message-ID: <d2quod$1iuv$1@ns.felk.cvut.cz>

I would need to get at canvas pixel color under certain moving widget or 
better (= faster?) colors/"types" of underlying static widgets that are 
of polygon shape (not rectangle).

How to arrange it without using higher math that must have to compute 
actual distance of each of point on a polygon?

I have found find_overlapping() but its not what I need and do not found 
something like getColorPixel().

Pavel


From sjmachin at lexicon.net  Sun Apr 24 07:31:20 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 24 Apr 2005 21:31:20 +1000
Subject: Unicode problems, yet again
References: <mailman.2362.1114309342.1799.python-list@python.org>
	<d4foo1$vnr$1@bagan.srce.hr>
Message-ID: <1jvm619o04aa9qv36f6a91636pugb7b1ob@4ax.com>

On Sun, 24 Apr 2005 11:26:20 +0200, Ivan Voras <ivoras at _-_fer.hr>
wrote:

>Jp Calderone wrote:
>
>>  You don't have a string fetched from a database, in iso-8859-2, alas.  
>> That is the root of the problem you're having.  What you have is a 
>> unicode string.
>
>Yes, you're right :) I actually did have iso-8859-2 data, but, as I 
>found out late last night, the data got converted to unicode along the way.

Just a thought: I noticed from the traceback that you are running this
on a Windows box. Profound apologies in advance if this question is an
insult to your intelligence, but you do know that Windows code page
1250 (Latin 2) -- which I guess is the code page that you would be
using -- is *NOT* the same as iso-8859-2, don't you?

>>> (Does anyone else feel that python's unicode handling is, well... 
>>> suboptimal at least?)
>> 
>>  Hmm.  Not really.  The only problem I've found with it is misguided 
>> attempt to "do the right thing" by implicitly encoding unicode strings, 
>> and this isn't so much of a problem once you figure things out, because 
>> you can always do things explicitly and avoid invoking the implicit 
>> behavior.
>
>I'm learning that, the hard way :)
>
>One thing that I always wanted to do (but probably can't be done?) is to 
>set the default/implicit encoding to the one I'm using... I often have 
>to deal with 8-bit encodings and rarely with unicode. Can it be done 
>per-program?

It's a bit difficult to understand what you are trying to do, but I'd
suggest that you forget about setting the default encoding; if you
need to deal with Unicode, then set up the encoding explicitly on a
per-file or per-socket basis. The default ASCII encoding is then there
as a trap when (sorry to rub it in) you don't know what type of data
you have.

HTH,
John




From deetsNOSPAM at web.de  Sun Apr 24 10:31:08 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 24 Apr 2005 16:31:08 +0200
Subject: Question on metaclasses
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
Message-ID: <d4gajc$oi8$05$2@news.t-online.com>

> class Foo(type):
>     def __new__(cls, name, bases, dict):
> 
>         for k,v in [(k, v) for k,v in dict.items() if callable(v)]:
>             cls.wrap(k,v,cls.get_directives(v), dict)
> 
>         return super(Foo, self).__new__(self, name, bases, dict)

There is a confusion of self and cls above - rename self with cls.
-- 
Regards,

Diez B. Roggisch


From fumanchu at amor.org  Fri Apr 22 17:58:21 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 22 Apr 2005 14:58:21 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E3771ECC@exchange.hqamor.amorhq.net>

mehmetmutigozel at gmail.com wrote:
> I was thinking about something like the following;
> 
> >>> a=[ t**n for n in range(4) ]
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 't' is not defined
> >>>
> 
> or
> 
> >>> a=[ lambda t: t**n for n in range(4) ]
> >>> t=2
> >>> a
> [<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
> <function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
> >>> t=3
> >>> a
> [<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
> <function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
> >>>
> 
> is something like that possible? Will you give me advice about that?

Are you looking for this?

>>> def four_powers(base):
... 	return [base ** exp for exp in xrange(4)]
... 
>>> four_powers(2)
[1, 2, 4, 8]
>>> four_powers(3)
[1, 3, 9, 27]

Function-calling isn't deprecated yet, to my knowledge... ;)


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From cam.ac.uk at mh391.invalid  Thu Apr 28 20:31:10 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 29 Apr 2005 01:31:10 +0100
Subject: logging problems
In-Reply-To: <mailman.2.1114733852.14961.python-list@python.org>
References: <mailman.2.1114733852.14961.python-list@python.org>
Message-ID: <d4rv8i$dre$1@gemini.csx.cam.ac.uk>

Simon Dahlbacka wrote:

> print sys.modules["traceback"]
> import traceback
> print "Hello World"
> sys.stdout.flush()
> 
> just renders: <module 'traceback' from 'C:\Python23\lib\traceback.pyc'> in the
> console, and no "Hello World"

Works fine on Python 2.4 for Windows.

> I'm running out of ideas what to try next, so suggestions/ideas appreciated!

That's a very strange failure condition. Perhaps something is wrong with your
Python installation. Have you edited any other system modules besides logging?

I would try a clean installation of the newest version and see if that fixes
it.
-- 
Michael Hoffman


From harlinseritt at yahoo.com  Thu Apr  7 01:44:18 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 6 Apr 2005 22:44:18 -0700
Subject: logging as root using python script
In-Reply-To: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
Message-ID: <1112852658.339035.185600@g14g2000cwa.googlegroups.com>

Hi Raghul,

If possible, run your program as root.

Harlin



From claudio.grondi at freenet.de  Wed Apr  6 19:43:40 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 6 Apr 2005 23:43:40 -0000
Subject: Problem with access to shared memory(W2K) / ORIGINALLY (win32)
	speedfan api control
References: <3bilaqF6in0icU1@individual.net> <hdijzrny.fsf@python.net>
	<3birmbF6bhm54U1@individual.net> <y8bvy7vd.fsf@python.net>
Message-ID: <3bj44iF6gj7t9U1@individual.net>

Thomas Heller,
  it seems, that your email address
  theller at python.net doesn't work
  or at least don't accept attachments,
  so maybe you can provide me with
  another one?

> ptr = cast(pBuf, POINTER(Buffer))
> print ptr # should print <ctypes.LP_Buffer object at ...>
> struct = ptr[0]

results in breakdown of Python
(Windows exception, can't read from memory
at 0x0...07)
due to existance of
> ptr = cast(pBuf, POINTER(Buffer))
but the print
> print ptr # should print <ctypes.LP_Buffer object at ...>
does its output to the console...

Strange...

Claudio

"Thomas Heller" <theller at python.net> schrieb im Newsbeitrag
news:y8bvy7vd.fsf at python.net...
> "Claudio Grondi" <claudio.grondi at freenet.de> writes:
>
> >> For the mistake you made see below, hope that helps.
> > It doesn't.
> >
> >> >     pBuf_buf = cast(pBuf, Buffer)
> >> Here's the problem.  pBuf is a pointer to a Buffer structure, not the
> >> buffer structure itself.
> >> Something like
> >>     pBuf_buf = Buffer.from_address(pBuf)
> >> may work.
> > If I currently understand it right, cast() should
> > do exactly this, i.e. should write the content
> > pointed to by pBuf to a Python variable
> > pBuf_buf which is an object of the Buffer
> > class, where I can access the single
> > components like any other Python
> > variables - am I right or wrong?
>
> You are right - my bad.
> pBuf is a pointer to your structure, so:
>
> ptr = cast(pBuf, POINTER(Buffer))
> print ptr # should print <ctypes.LP_Buffer object at ...>
> struct = ptr[0]
>
> and now 'struct' should contain the data that you need.
>
> >> For the general way to solve this problem you should know that you can
> >> access a shared memory area with a certain name also with Python's mmap
> >> module, although that is probably not documented very good.  There was
a
> >> recipe posted a few days ago which showed different ways to acces
shared
> >> memory, with or without ctypes.
> >
> >> > The code I use is provided also here:
> >> >  http://www.codecomments.com/Python/message430495.html
> >> >  http://mail.python.org/pipermail/python-list/2005-March/271853.html
> >> > (the mmap part of it doesn't work at all)
> >
> > So I am already using the recipe, right?
> > But it doesn't work as expected.
> > mmap doesn't work at all failing in
> > shmem = mmap.mmap(0, 0, "$M$B$M$5$S$D$", mmap.ACCESS_READ)
> > with WindowsError: [Errno 87] wrong parameter
>
> I get this error when I try to open a non-existing shared memory block.
> From the mmap docs:
>
>   If length is 0, the maximum length of the map is the current size of
>   the file, except that if the file is empty Windows raises an exception
>   (you cannot create an empty mapping on Windows).
>
> If I run it with non-zero length it does not raise an exception
>
>   shmem = mmap.mmap(0, 0, "$M$B$M$5$S$D$", mmap.ACCESS_READ)
>
> although it *creates* the shared memory block, IIUC.  Are you sure your
> speedfan app is running when you get the WindowsError?
>
> Thomas




From EckhoffM at NAVO.NAVY.MIL  Thu Apr 28 15:48:37 2005
From: EckhoffM at NAVO.NAVY.MIL (Eckhoff, Michael A)
Date: Thu, 28 Apr 2005 14:48:37 -0500
Subject: interactive web graphics
Message-ID: <23E4371F6124D411B59B00805F9FA97115D68284@navont3.navo.navy.mil>

Thanks Larry and Diez. I figured that doing
'GUIs over the web' would probably not work.

Where I work, we have a bunch of numerical
weather-prediction-type models that take
several hours to run. By having a cron job
copy over the output, I think I can still
implement a type of progress bar using an
update button, and show some png images as
well. Animations would be nice, but I have
not reached that point yet.

In case anyone is interested...
The initial plan was to use a GTK+ GUI
to monitor these models and the GIMP
library to create an indexed image from
the pressure field, overlayed with vectors
depicting winds (or currents, for the ocean).
Think I'll take another look at pygtk.

Mike E


From mwm at mired.org  Sat Apr  9 17:42:04 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 09 Apr 2005 16:42:04 -0500
Subject: email and smtplib modules
References: <1113081060.969295.36900@o13g2000cwo.googlegroups.com>
Message-ID: <86d5t3wrtf.fsf@guru.mired.org>

"mark.greenbank at gmail.com" <mark.greenbank at gmail.com> writes:

> Hi,
>
> I'm writing a small script that generates email and I've noticed that:
>
> 1) one should add the 'To' and 'CC' headers to the email message
> 2) one needs to specify the recipients in the smtplib sendmail() method
>
> Can someone explain how these are related?

Sure.

It's all to do with smtp. With smtp mail, as with paper mail, there is
an "envelope" that has addresses on it that the mail system uses to
deliver messages, and the "letter", that has addresses in it that are
displayed to the end user.

The To: and Cc: headers in the message itself are in the letter. The
end user sees those. smtp servers ignore them.

The recipients passed to the smtplib sendmail() method go on the
envelope. The smtp server will deliver to those addresses, and they
won't be shown to end users.

This design makes many things possible. Most used these days is spam
delivered to one address while apparently to another.

          <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From deetsNOSPAM at web.de  Thu Apr 21 11:03:33 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 21 Apr 2005 17:03:33 +0200
Subject: recording data between [ and ]
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
Message-ID: <d48fc1$2rm$00$1@news.t-online.com>

> Yes, it does... may take me a few minutes to get my head around it
> though. Why do re's have to be so arcane and complicated... especially
> in Python?
> 
> It's hard to preach 'ease of use' with stuff such as this in the
> language. Perhaps one day it can be rolled up into something that
> *really* is easy to understand:

Welcome to the wonderful world of programming. Regular expressions are what
they are because they are modeled after a certain theory - that of finite
state automata and their correspondence to certain classes of grammars. And
they require a bit of understanding. And there is no language that does
them different - some integrate them syntactically (like perl), others
don't have them available in the standard lib at all. But if you get them,
they always look like that.

> import string
> 
> fp = file('filename')
> data = fp.read()
> fp.close()
> 
> string.between(data,[,])

how about

import whatever_is_needed
solve_my_problem()

? Seriously: Programming or maybe better saying the way we tell computers
what to do might evolve by standardization to a point where lots of tasks
get easier.You actual problem might be solved easier one day if
commandline-tools agree on a specific output format (viewed from today
thate means possibly xml) and standard tools to deal with these.

But as the world is complex and people want solutions to their complex
problems, IMHO programming will always be about such nitty gritty details. 


-- 
Regards,

Diez B. Roggisch


From tzot at sil-tec.gr  Mon Apr  4 13:31:52 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 04 Apr 2005 20:31:52 +0300
Subject: LD_LIBRARY_PATH - how to set?
References: <FSB2e.26553$aS5.16275@trndny05>
	<r8WdnesmkedK4NbfRVn-vA@speakeasy.net>
	<7465b617050330210850d1717a@mail.gmail.com>
	<424B96BF.5010305@pa.press.net>
	<7465b61705033022391fb9b52b@mail.gmail.com>
	<424B9A2A.8020603@pa.press.net>
	<mailman.1117.1112253348.1799.python-list@python.org>
	<BSR2e.19000$C7.5251@news-server.bigpond.net.au>
	<wVR2e.19002$C7.5542@news-server.bigpond.net.au>
	<slrnd4nrfe.20i.apardon@rcpc42.vub.ac.be>
	<ze13e.19619$C7.19233@news-server.bigpond.net.au>
Message-ID: <teu251pjadocjl6uvj4uo8riatsentp8b8@4ax.com>

On Fri, 01 Apr 2005 01:13:03 GMT, rumours say that Joal Heagney
<joal at bigpond.net.au> might have written:

>>><wrapped program> $*
>>>-----------------------------------------------------------
>> 
>> 
>> And you should change that last line to:
>> 
>>   <wrapped program> "$@"
>> 
>
>Ah yes, because we want the arguments passed in as seperate words, not 
>as a whole string.

No, this would happen if your last line was

<wrapped program> "$*"


To summarize, suppose your script is called with the following
arguments:

<wrapper_script> "File with space.txt" arg2 arg3

Here follow "last lines" and the corresponding sys.argv[1:]:

LAST LINE: <wrapped_program> $*
SYS.ARGV : ["File", "with", "space.txt", "arg2", "arg3"]

LAST LINE: <wrapped_program> "$*"
SYS.ARGV : ["File with space.txt arg2 arg3"]

LAST LINE: <wrapped_program> "$@"
SYS.ARGV : ["File with space.txt", "arg2", "arg3"]

For more information, see man 1 bash or man 1 ksh or man 1 sh.  Don't
know if this applies to *csh family.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From jerf at jerf.org  Fri Apr  1 10:50:53 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 10:50:53 -0500
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<l-qdnS9Is-M_ZdHfRVn-vA@speakeasy.net>
Message-ID: <pan.2005.04.01.15.50.51.219430@jerf.org>

On Thu, 31 Mar 2005 23:30:42 -0800, Erik Max Francis wrote:

> Daniel Silva wrote:
> 
>> Shriram Krishnamurthi has just announced the following elsewhere; it might
>> be of interest to c.l.s, c.l.f, and c.l.p:
>> http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html
> 
> April Fool's Day again, eh?

Yes and no. In the Python community, we're taking all of that pretty
seriously. The scheme community may not seriously be thinking of getting
rid of those things, but it's hardly impossible that some people think it
might be better off without it.


From jason.mobarak at gmail.com  Fri Apr 29 00:28:07 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 28 Apr 2005 21:28:07 -0700
Subject: Shutting down twisted reacotr
References: <d4oqhj$he4$1@news-int2.gatech.edu>
	<1114652186.103374.240070@o13g2000cwo.googlegroups.com>
	<d4ql8o$c6m$1@news-int2.gatech.edu>
Message-ID: <1114748887.154885.15310@z14g2000cwz.googlegroups.com>

You might not need threads to get user input from the console. Jp
posted this in response to a similar query on the twisted-python
mailing list:

http://article.gmane.org/gmane.comp.python.twisted/9019



From ivanlan at pauahtun.org  Tue Apr 19 19:18:54 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 19 Apr 2005 17:18:54 -0600
Subject: Variables variable
References: <mailman.2096.1113916800.1799.python-list@python.org>
	<3ckeukF6n53cpU1@individual.net> <3u8gj2-o28.ln1@lairds.us>
Message-ID: <426591DE.BE6609B3@pauahtun.org>

Hi All--

Cameron Laird wrote:
>                     .
> I have a few comments on this:  Python can do essentially what
> PHP does.  One means is the getattr() Reinhold cites.
> 
> HOWEVER, it's generally always a mistake to do so.  Dictionaries
> are simply better.  AND THAT'S TRUE IN PHP, too.  I'm frankly
> disappointed in PHP leaders that they continue to promote this
> "variable-variable" idiom.  As much as anything is certain in
> the realm of stylistic expression, dictionaries are a superior
> mechanism.
>

I don't know if this dictionary insight is Cameron's, but my experience
with Python has been that when I'm developing something from scratch,
I'll start with a big pile of cruft.  "I think I'll need this.  Oh, and
that, too.  And what about this!  Oooh, cool!"  Then I start carving
away the excess.  It usually takes two or three iterations at carving to
realize that whatever it is needs a dictionary.  I have never seen a
case where a dictionary didn't improve the design.  +1QOTW.

Well.  Storing a Mayan number/date as a dictionary turned out to be a
Spectacularly Bad Idea(tm);-), so I guess that's one case.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From ckwiguno at gmail.com  Tue Apr 19 20:17:21 2005
From: ckwiguno at gmail.com (ckwiguno at gmail.com)
Date: 19 Apr 2005 17:17:21 -0700
Subject: The value of the entry widget doesn't get updated
In-Reply-To: <426563c7$0$20623$626a14ce@news.free.fr>
References: <ea0a4a1a.0504190736.1490276b@posting.google.com>
	<426563c7$0$20623$626a14ce@news.free.fr>
Message-ID: <1113956241.104875.280640@o13g2000cwo.googlegroups.com>

Yes that solves my problem all right...THanks a bunch to both of you



From david at handysoftware.com  Mon Apr  4 23:57:12 2005
From: david at handysoftware.com (David Handy)
Date: Mon, 4 Apr 2005 23:57:12 -0400
Subject: Unexpected result when comparing method with variable
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB0030@its-xchg4.massey.ac.nz>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802812301@its-xchg4.massey.ac.nz>
	<ECBA357DDED63B4995F5C1F5CBE5B1E801DB0030@its-xchg4.massey.ac.nz>
Message-ID: <20050405035712.GA15960@arno2>

On Tue, Apr 05, 2005 at 03:38:09PM +1200, Tony Meyer wrote:
> [David Handy]
> > I had a program fail on me today because the following didn't 
> > work as I expected:
> > 
> > >>> class C:
> > ...     def f(self):
> > ...         pass
> > ...
> > >>> c = C()
> > >>> m = c.f
> > >>> m is c.f
> > False
> [...]
> > The workaround really awkward:
> 
> What's wrong with this?
> 
> >>> class C:
> ... 	def f(self):
> ... 		pass
> ... 	def g(self):
> ... 		pass
> ... 	
> >>> c = C()
> >>> m = c.f
> >>> m == c.f
> True
> >>> m == c.g
> False

Nothing is wrong with that, I just (blush) didn't think to try == instead of
"is".

Since == works, that also means that using a method as a key to a dictionary
also works reliably:

>>> d = {c.f: 'special case 1'}
>>> d[c.f]
'special case 1'

So I have no more complaints, other than I expected "is" to work and it
didn't...but I can do what I want and it isn't awkward, so  I'll just go
back in my hole now...

Thanks,
David H.



From fredrik at pythonware.com  Mon Apr 18 16:39:06 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 18 Apr 2005 22:39:06 +0200
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d4150k$l4q$1@sea.gmane.org>
Message-ID: <d415lm$ng0$1@sea.gmane.org>

Michael Spencer wrote:

> See also the source of inspect.getargs for just how much this complicates the 
> argument-passing logic!

it doesn't complicate the argument-passing in any way at all -- it complicates
the reverse engineering code a bit, though, since it has to convert the bytecode
for

    def f(tmp):
        a, b = tmp
        ...

back to the original source form

    def f((a, b)):
        ...

but that has absolutely nothing whatsoever to do with how argument passing
works at run time.

</F>



From eurleif at ecritters.biz  Sun Apr 10 11:31:03 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sun, 10 Apr 2005 15:31:03 GMT
Subject: Why does StringIO discard its initial value?
Message-ID: <XEb6e.556$Cz3.49700@monger.newsread.com>

When StringIO gets an initial value passed to its constructor, it seems 
to discard it after the first call to .write(). For instance:

 >>> from StringIO import StringIO
 >>> buffer = StringIO('foo')
 >>> buffer.getvalue()
'foo'
 >>> buffer.write('bar')
 >>> buffer.getvalue()
'bar'
 >>> buffer.write('baz')
 >>> buffer.getvalue()
'barbaz'

The obvious workaround is to call buffer.write() with the initial value 
instead of passing it to StringIO's constructor, so this issue doesn't 
bother me very much, but I'm still curious about it. Is this the 
expected behavior, and why it isn't mentioned in the docs if so?


From phil_nospam_schmidt at yahoo.com  Fri Apr  8 10:39:10 2005
From: phil_nospam_schmidt at yahoo.com (phil_nospam_schmidt at yahoo.com)
Date: 8 Apr 2005 07:39:10 -0700
Subject: Rotating arbitrary sets of elements within a list
Message-ID: <1112971150.361681.313100@o13g2000cwo.googlegroups.com>

I'm trying to come up with a good algorithm to do the following:

Given a list 'A' to be operated on, and a list 'I' of indices into 'A',
rotate the i'th elements of 'A' left or right by one position.

Here's are some examples:

A = [a, b, c, d, e, f]
I = [0, 3, 4]

rotate(A, I, 'left') --> [b, c, d, e, f, a]
rotate(A, I, 'right') --> [b, a, c, f, d, e]

I = [1, 3, 4]

rotate(A, I, 'left') --> [b, a, d, e, c, f]
rotate(A, I, 'right') --> [a, c, b, f, d, e]

Any ideas?



From ivanlan at pauahtun.org  Tue Apr 12 10:26:38 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 12 Apr 2005 08:26:38 -0600
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<8qan515t9sedgbp954fj85jvu0tc2171ec@4ax.com>
Message-ID: <425BDA9E.3085184C@pauahtun.org>

Hi All--

Richie Hindle wrote:
> 
> [Xah]
> > motherfucking ... fucking ... fucking ... fucking ... fuck ... fucking
> > fucking ... fucking ... mother fucking ... fucking ... piece of shit ...
> > motherfucking ... fucking ... fucking ... big asshole ... masturbation ...
> > Fucking morons ... fucking stupid ... fuckhead coders ... fuckheads ...
> > you fucking asses.
> 
> > paypal me a hundred dollars and i'll rewrite the whole re doc in a few
> > hours.
> 
> Can we paypal you a hundred dollars to leave us alone?  I'll pledge $10.
> Are there another nine people here who'll do the same?
> 
> 

Why don't we pay him $100 to re-write the PERL docs?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From andrew at nospam.com  Sun Apr 17 07:38:09 2005
From: andrew at nospam.com (Andrew E)
Date: Sun, 17 Apr 2005 13:38:09 +0200
Subject: module to parse "pseudo natural" language?
Message-ID: <d3thql$4rh$1@news.hispeed.ch>

Hi all

I've written a python program that adds orders into our order routing
simulation system. It works well, and has a syntax along these lines:

  ./neworder --instrument NOKIA --size 23 --price MARKET --repeats 20

etc

However, I'd like to add a mode that will handle, say:

  ./neworder buy 23 NOKIA at MKT x 20

I could enter several orders either by running multiple times, or use a
comma-separated approach, like:

  ./neworder buy 23 NOKIA at MKT on helsinki, sell 20 NOKIA at market on
helsinki

The thing about this is that its a "tolerant" parser, so all of these
should also work:

  # omit words like "at", "on"
  ./neworder buy 23 NOKIA mkt helsinki

  # take any symbol for helsinki
  ./neworder buy 23 mkt helsinki

  # figure out that market=helsinki
  ./neworder buy 23 NOKIA at market price


I've started writing a simple state-based parser, usage like:

  class NaturalLanguageInsructionBuilder:

    def parse( self, arglist ):
      """Given a sequence of args, return an Instruction object"""
      ...
      return Instruction( instrument, size, price, ... )


  class Instruction:
    """encapsulate a single instruction to buy, sell, etc"""

    def __init__( self, instrument, size, price, ... ):
      ...


This doesn't work yet, but I know with time I'll get there.

Question is - is there a module out there that will already handle this
approach?

Thanks for any suggestions :)

Andrew


From miki.tebeka at zoran.com  Wed Apr 27 07:16:08 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Wed, 27 Apr 2005 14:16:08 +0300
Subject: Howto debug c++ (SWIG) extension under Windows
In-Reply-To: <426F52F0.4080009@stacom-software.de>
References: <d4l0ah$hqe$01$1@news.t-online.com>
	<mailman.2532.1114537748.1799.python-list@python.org>
	<426F52F0.4080009@stacom-software.de>
Message-ID: <20050427111608.GD1168@zoran.com>

Hello Alexander,

> >>I can't figure out howto debug my c++ extension. If i compile it as 
> >>release version, I've of course no chance to set a breakpoint.
> >This is not true. You *can* set breakpoints in release mode, make sure to
> >add debug information to your release build so you'll be able to see the
> >sources.
> >There are several cases (such as inlined functions) that you *can't* set
> >breakpoint to.
> 
> Don't work because of  my MSVCR71D.dll problem. It seems, that if I 
> include DEBUG informations in my project, there is a reference to that 
> (debug) DLL.
But I'm talking about *release* build.

> >>If I > compile as debug I get the Error-window:
> >>
> >>... missing MSVCR71D.dll ...
> >Just copy it (and msvcp71d.dll) from your c:\windows\system32 (or wherever
> >your windows is installed) to the "Debug" library (or to the Python install
> >library).
> 
> I don't have the dll MSVCR71D.dll on my system path. What I'm a bit
> confused about is, that I can't even start python_d (installed by 
> ActiveState DEBUG extension to ActivePython). It requires also the DLL.
> 
> Does anybody know, where to get that DLL ?
Try "download MSVCR71D.dll" in google.

Another option if to compile you extension in debug mode but to link it to
the "regular" Python. Just undef _DEBUG when compiling the SWIG output
file.

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From mahs at telcopartners.com  Tue Apr 19 20:00:02 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 19 Apr 2005 17:00:02 -0700
Subject: Array of Chars to String
In-Reply-To: <d443t0$tg8$1@sea.gmane.org>
References: <mailman.2133.1113942800.1799.python-list@python.org>	<42658990.7739398@news.oz.net>
	<d443t0$tg8$1@sea.gmane.org>
Message-ID: <d445op$1pt$1@sea.gmane.org>

Michael Spencer wrote:
> Bengt Richter wrote:
>  > I think this will be worth it if your string to modify is _very_ long:
> 
>>
>>  >>> def some_func(s, letters, table=''.join([chr(i) for i in 
>> xrange(256)])):
>>  ...     return s.translate(table,
>>  ...            ''.join([chr(i) for i in xrange(256) if chr(i) not in 
>> letters]))
>>  ...
>>  >>> some_func("Bob Carol Ted Alice", 'adB')
>>  'Bad'
>>
> According to my measurements the string doesn't have to be long at all 
> before your method is faster - cool use of str.translate:
> 
...and here's a version that appears faster than "".join across all lengths of 
strings:
  >>> import string
  >>> def some_func1(s, letters, table=string.maketrans("","")):
  ...     return s.translate(table, table.translate(table, letters))
  ...
  >>> some_func1("Bob Carol Ted Alice", "adB")
  'Bad'
  >>>

Timings follow:

  >>> def some_func(s, letters, table=''.join([chr(i) for i in xrange(256)])):
  ...     return s.translate(table,
  ...         ''.join([chr(i) for i in xrange(256) if chr(i) not in letters]))
  ...
  >>> def some_func1(s, letters, table=string.maketrans("","")):
  ...     return s.translate(table, table.translate(table, letters))
  ...
  >>> for multiplier in (1, 10, 100, 1000, 10000):
  ...     print "List multiplier: %s" % multiplier
  ...     print shell.timefunc(some_func, "Bob Carol Ted Alice" * multiplier, 'adB')
  ...     print shell.timefunc(some_func1, "Bob Carol Ted Alice" * multiplier, 
'adB')
  ...
  List multiplier: 1
  some_func(...)  1224 iterations, 408.57usec per call
  some_func1(...)  61035 iterations, 8.19usec per call
  List multiplier: 10
  some_func(...)  1223 iterations, 408.95usec per call
  some_func1(...)  54420 iterations, 9.19usec per call
  List multiplier: 100
  some_func(...)  1190 iterations, 420.48usec per call
  some_func1(...)  23436 iterations, 21.34usec per call
  List multiplier: 1000
  some_func(...)  951 iterations, 0.53msec per call
  some_func1(...)  3870 iterations, 129.21usec per call
  List multiplier: 10000
  some_func(...)  309 iterations, 1.62msec per call
  some_func1(...)  417 iterations, 1.20msec per call
  >>>



From andrea.gavana at agip.it  Fri Apr  8 03:25:07 2005
From: andrea.gavana at agip.it (andrea.gavana at agip.it)
Date: Fri, 8 Apr 2005 09:25:07 +0200
Subject: Problems On Path
Message-ID: <OF3121C685.F4C7A671-ONC1256FDD.00284072-C1256FDD.0028C093@eni.pri>

Hello NG,

      yesterday I installed Python 2.4.1 (together with all the
site-packages I need for it, including Pythonwin, wxPython, py2exe,
etc...), but then I found that for some of my py2exe generated application
there were some problems. So, I came back and I re-installed Python 2.3.4
as before (together with all the site-packages I need for it). Now,
however, I am having some strange problems in using Pythonwin. If I do:

import wx

That is the usual import for wxPython, Python thinks that my wx is:

<module 'wx' from 'C:
\Python23\lib\site-packages\vtk_python\wx\__init__.pyc'>

so it imports VTK instead of wxPython. I know I can modify this behaviour
by doing, at the beginning of the app:

sys.path.insert(0, 'C:\\Python23\\lib\\site-packages\\wx-2.5.5-msw-ansi')

So that "wx" is REALLY wxPython... but in the old installation I didn't
need to da so, wx was recognised as wxPython and vtk_python as vtk.
Am I missing something?

Thanks to you all

Andrea.

------------------------------------------------------------------------------------------------------------------------------------------
 Message for the recipient only, if received in error, please notify the
sender and read http://www.eni.it/disclaimer/




From gandalf at geochemsource.com  Tue Apr 19 09:20:26 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 19 Apr 2005 15:20:26 +0200
Subject: modules and namespaces
In-Reply-To: <4265027C.2090104@mage.hu>
References: <4265027C.2090104@mage.hu>
Message-ID: <4265059A.1030301@geochemsource.com>


>However it doesn't work until I import the string module into m1 and m2
>modules. I found in the manual that imported modules will be searched in
>the container module first. Is it more efficient to import the string
>module into main and m1 and m2 than importing only into m1 and m2?
>  
>
I bet the most efficient is

str.join( ('a','b'))

The reason is that 'str' is a built-in type. But since new style classes 
were introduced, they are also real objects with methods. :-)


p.s.: Hello Mage. I'm also known as nagylzs at enternet dot hu. Do you 
remember me from the SQL list? Good to see you here. :-)


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From stephen.thorne at gmail.com  Sun Apr  3 18:22:07 2005
From: stephen.thorne at gmail.com (stephen.thorne at gmail.com)
Date: 3 Apr 2005 15:22:07 -0700
Subject: StopIteration in the if clause of a generator expression
In-Reply-To: <d2j6au$k1o$04$1@news.t-online.com>
References: <d2j6au$k1o$04$1@news.t-online.com>
Message-ID: <1112566927.548752.144950@z14g2000cwz.googlegroups.com>

This is all just making everything far too complicated. What you really
want to do is quite simple:

import itertools
def condition(x): return x < 5

list(itertools.takewhile(condition, (i for i in range(10))))

The 'Stop Iteration In Generator Expression' problem was solved in the
language that List Comprehensions came from, Haskell. Haskell's basic
library, prelude, had a series of functions that have found their way
into the itertools toolbox. I highly recommend having a read of the
itertools docs if you want to continue hacking around with generators.

Regards,
Stephen Thorne



From jason_ at jason.jason  Wed Apr  6 01:50:12 2005
From: jason_ at jason.jason (jason_)
Date: Wed, 06 Apr 2005 15:50:12 +1000
Subject: fastcgi
Message-ID: <42537894$1_1@news.iprimus.com.au>

Hi

Is anyone using fastcgi (the fastcgi.py file floasting around, or jonpy) 
in a poduction environment?

I'm just wondering how stable python would be with fastvgi and lightttpd

thanks
Jason


From fredrik at pythonware.com  Fri Apr 15 11:18:35 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 15 Apr 2005 17:18:35 +0200
Subject: Get OS name
References: <1113572595.889597.206690@g14g2000cwa.googlegroups.com><425FC7F6.8040405@athop1.ath.vt.edu>
	<1113574033.787739.318840@o13g2000cwo.googlegroups.com>
Message-ID: <d3olof$7t4$1@sea.gmane.org>

"codecraig" wrote:

> How can I get the OS Name, such as "Windows XP Pro"

>i guess i wanted the result in a nice string like Windows XP instead of
> 5.1
>
> i guess i'll have to convert it myself, thanks

your requirements keep changing.  to get the OS name in a platform-
independent way, use the platform module:

> python
>>> import platform
>>> print platform.system(), platform.release()
Windows XP

$ python
>>> import platform
>>> print platform.system(), platform.release()
Linux 2.4.18-3

etc.

(tip: reading the "library reference" table of contents a couple of times is a great way
to learn about the contents of the standard library. http://docs.python.org/lib/lib.html )

</F> 





From francesco at f0x.it  Sun Apr  3 08:41:07 2005
From: francesco at f0x.it (Francesco)
Date: Sun, 03 Apr 2005 14:41:07 +0200
Subject: A ClientForm Question
References: <1112351784.512279.198080@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2005.04.03.12.41.05.4355@f0x.it>

Il Fri, 01 Apr 2005 02:36:24 -0800, narke ha scritto:

> Does anyone here use ClientForm to handle a HTML form on client side?
> 
> I got a form, within which there is a image control, it direct me to
> another page if i use mouse click on it.  the code of the form as
> below:
> 
> <form name="ZoomControl1:Form1" method="post"
> action="CDocZ_MAG.aspx?Stat=DocZoom_DocZoom&amp;&amp;E=29YL53ZJBIEZ&amp;DT=ALB&amp;Pass=&amp;Total=104&amp;Pic=1&amp;o="
> id="ZoomControl1_Form1" onkeydown="JavaScript:Navigation_ie();">
> 
> ...
> 
> <input type="image" name="ZoomControl1:Imagebutton2" onclick="if
> (typeof(Page_ClientValidate) == 'function') Page_ClientValidate(); "
> language="javascript" id="ZoomControl1_Imagebutton2"
> src="../Images/Btn_GoImage.gif" border="0" />&nbsp;
> 
> ...
> 
> </form>
> 
> So write below code to 'click' the image button,
> 
>     forms = ParseResponse(urlopen(url))
> 
>     form = forms[0]
>     urlopen(form.click("ZoomControl1:Imagebutton2"))
> 
> unfortunatly, however, when the code run, it just got a page which is
> not the one i desired ( i actually wish to get the same page as i
> 'click' the button).  I guess that is "onclick=" statement cause
> something weird, but I do not understand it.  And, in the source
> containing the form, i found nowhere the Page_ClientValidate() resides.
> 
> What's wrong?
> 
> -
> narke

Similar problem for me.
In the form, i have
<input type="button" value="entra" class="button"
onClick="document.UserForm.submit()">
and i don't know how to click this.
urlopen(form.click()) doesn't nothing.
UserForm is the name of the form.

Francesco


From codecraig at gmail.com  Fri Apr 15 08:39:21 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 05:39:21 -0700
Subject: Python - interpreted vs compiled
In-Reply-To: <mailman.1955.1113567592.1799.python-list@python.org>
References: <1113566234.343746.48460@o13g2000cwo.googlegroups.com>
	<mailman.1955.1113567592.1799.python-list@python.org>
Message-ID: <1113568761.816410.123250@g14g2000cwa.googlegroups.com>

thanks.



From steve at holdenweb.com  Wed Apr 13 22:09:56 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 22:09:56 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <1113443536.428399.33790@f14g2000cwb.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>	<mailman.1819.1113380033.1799.python-list@python.org>	<1113388891.512839.111250@f14g2000cwb.googlegroups.com>	<mailman.1827.1113391383.1799.python-list@python.org>
	<1113443536.428399.33790@f14g2000cwb.googlegroups.com>
Message-ID: <d3kj6r$pk6$1@sea.gmane.org>

runes wrote:
> Steve, thank you for givig me those links. I'll go there if I manage to
> structure an improvement suggestion.
> 
RTFM :-) [The links came from the documentation]

> And about the link to the Howto: I suppose many people don't read the
> manual from a to z but with a particular problem in mind. Hence the
> link could ble locateded several places, perhaps referencing to an
> exact and relevant section of the Howto.
> 
> Rune
> 
That's great. There are any number of folk on this list that will help 
you provide something of lasting value to the community, and Fred Drake 
is always busy enough to appreciate help! These days you can overlay 
your own "virtual index" on the Internet content, simply referring to 
the published pages as hypertext resources.

I have my own concerns about the documentation, but happily nothing that 
stops me from finding it useful on a daily basis. [Having been a reader 
for five years doesn't hurt, but by no means exhausts the learning 
potential of these documents].

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From steve at holdenweb.com  Wed Apr 20 12:38:14 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 20 Apr 2005 12:38:14 -0400
Subject: Python Debugger with source code tracking ability
In-Reply-To: <1a8f96a00504200630654a24c9@mail.gmail.com>
References: <ed89f8f2.0504191845.aaeebf5@posting.google.com>	<d52c72d205042005272e426006@mail.gmail.com>
	<1a8f96a00504200630654a24c9@mail.gmail.com>
Message-ID: <d4609j$13a$1@sea.gmane.org>

Richard Eibrand wrote:
> On 4/20/05, Jaime Wyant <programmer.py at gmail.com> wrote:
> 
>>I haven't tried the customizations listed at the site below.  If it
>>works, let me know.
>>
>>http://page.sourceforge.net/tricks.html
>>
>>jw
>>
>>On 19 Apr 2005 19:45:05 -0700, Tran Tuan Anh <anhtt at hotmail.com> wrote:
>>
>>>Hi all,
>>>
>>>I am new to Python and desperated to look for a good Python debugger.
>>>I mean a debugger with source coding tracking. For C/C++, emacs and
>>>gud offers execellent development env. The source code tracking is
>>>extremely useful for recursive functions.
> 
> 
> You could take a look at Eclipse (http://eclipse.org/) in conjunction
> with pydev (http://pydev.sourceforge.net/). Or you could take a look
> at Komodo (http://www.activestate.com/Products/Komodo/) which is a
> commercial product with a trial version.
> 
For my money it's well worth looking at Wing (http://wingware.com) - the 
more I use this system the more I like it, and I especially like the way 
I can inspect and set breakpoints in GUI-based code - it can be 
wxPython, Tkinter or something else entirely. The ability to execute 
ad-hoc Python statements in the context of interrupted code is a godsend 
in heavy debugging sessions.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From sunnan at handgranat.org  Fri Apr  1 11:45:02 2005
From: sunnan at handgranat.org (Sunnan)
Date: Fri, 01 Apr 2005 16:45:02 GMT
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <pan.2005.04.01.15.50.51.219430@jerf.org>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<l-qdnS9Is-M_ZdHfRVn-vA@speakeasy.net>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
Message-ID: <iUe3e.21015$d5.156054@newsb.telia.net>

Jeremy Bowers wrote:
> Yes and no. In the Python community, we're taking all of that pretty
> seriously. The scheme community may not seriously be thinking of getting
> rid of those things, but it's hardly impossible that some people think it
> might be better off without it.

Lambda is a primitive in Scheme; in some implementations of scheme it's 
used to implement things like temporary variables (let), sequences 
(begin) and looping (named let/letrec).

Python has other ways of doing these things; and removing things that 
has been obsoleted or superfluous makes sense, for Pythons ideal of 
having one canonical, explicit way to program.

Having a few very abstract primitives that the rest of the language can 
theoretically be built upon is one of the reasons why Scheme/Lisp can 
work as a programmable programming language.

Scheme is like Go - a few abstract rules that can be combined in 
endless, sprawling ways.

Python is like (hmm, better let some pythonista answer this. I'm 
thinking of a game with a clear thematical connection (like Monopoly or 
The Creature that Ate Sheboygan) and a few explicit rules that combine 
in ways that is supposed to have a clear, readable, consistent result). 
Maybe shogi?

(I don't usually read comp.lang.python and I really don't want to offend 
anyone. My apologies if this post is either annoyingly obvious (and thus 
contains only stuff that's been said a million times), or totally wrong.)

Sunnan


From beyer at imb-jena.de  Fri Apr  1 00:00:13 2005
From: beyer at imb-jena.de (Andreas Beyer)
Date: Thu, 31 Mar 2005 21:00:13 -0800
Subject: string goes away
In-Reply-To: <16972.46839.309827.574430@montanaro.dyndns.org>
References: <424CCED4.60000@imb-jena.de>
	<16972.46839.309827.574430@montanaro.dyndns.org>
Message-ID: <424CD55D.8000506@imb-jena.de>

Yeeh, I was expecting something like that. The only reason to use map() 
at all is for improving the performance.
That is lost when using list comprehensions (as far as I know). So, this 
is *no* option for larger jobs.

Andreas

Skip Montanaro wrote:

>    >>> upper_list = map(string.upper, list_of_str)
>
>    Andreas> What am I supposed to do instead?
>
>Try
>
>    [s.upper() for s in list_of_str]
>
>Skip
>
>  
>



From kent37 at tds.net  Sun Apr 17 07:31:51 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 17 Apr 2005 07:31:51 -0400
Subject: Pattern Matching Given # of Characters and no String Input;
	useRegularExpressions?
In-Reply-To: <42623565$0$3566$626a14ce@news.free.fr>
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
Message-ID: <426244f5$1_2@newspeer2.tds.net>

tiissa wrote:
> Synonymous wrote:
> 
>> Can regular expressions compare file names to one another. It seems RE
>> can only compare with input i give it, while I want it to compare
>> amongst itself and give me matches if the first x characters are
>> similiar.
> 
> Do you have to use regular expressions?
> 
> If you know the number of characters to match can't you just compare 
> slices?
> 
> It seems to me you just have to compare each file to the next one (after 
> having sorted your list).

itertools.groupby() can do the comparing and grouping:

  >>> import itertools
  >>> def groupbyPrefix(lst, n):
  ...   lst.sort()
  ...   def key(item):
  ...     return item[:n]
  ...   return [ list(items) for k, items in itertools.groupby(lst, key=key) ]
  ...
  >>> names = ['cccat', 'cccap', 'cccan', 'cccbt', 'ccddd', 'dddfa', 'dddfg', 'dddfz']
  >>> groupbyPrefix(names, 3)
[['cccat', 'cccap', 'cccan', 'cccbt'], ['ccddd'], ['dddfa', 'dddfg', 'dddfz']]
  >>> groupbyPrefix(names, 2)
[['cccat', 'cccap', 'cccan', 'cccbt', 'ccddd'], ['dddfa', 'dddfg', 'dddfz']]

Kent


From mauriceling at acm.org  Thu Apr 28 17:49:35 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 29 Apr 2005 07:49:35 +1000
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
	<d4qsmj$5gr$1@domitilla.aioe.org>
Message-ID: <d4rlpk$37g$1@domitilla.aioe.org>

steve.leach wrote:
>> python -o foo.exe foo.py
>>
>> at the command line, and get an executable, without any further effort.
> 
> 
> Hence making the resulting program useless to users of most operating 
> systems.

In close sourced development, which most corporates may prefer, yes, the 
resulting program is useless to users of most operating systems.

In open sourced developement, it is still a good feature to have. At 
least for distribution to end users or as trial.

To end users, they don't care, as long as they can click and run the 
program they need.

To developers, if the codes are close source, nothing can be done anyway 
even if you have the codes, licensing agreements and contracts usually 
forbids everything. If the codes are open source, you will get the codes 
  anyway and do according to the limits of the licence.

maurice


From eldiener_no_spam_here at earthlink.net  Sat Apr  9 17:55:34 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Sat, 09 Apr 2005 21:55:34 GMT
Subject: Installing Python 2.4 on Linux
In-Reply-To: <mailman.1620.1113062462.1799.python-list@python.org>
References: <mailman.1620.1113062462.1799.python-list@python.org>
Message-ID: <qbY5e.3137$go4.181@newsread2.news.atl.earthlink.net>

John Ridley wrote:
> * Edward Diener wrote:
> 
>>I need python to be python2.3 else many utilities no longer work.
> 
> 
> Then leave your 2.3 installation exactly as it is (so that python is a
> link to python2.3) and run python2.4 where needed.
> 
> To specifically use python 2.4 to run IDLE, simply type in a shell:
> 
> [user]$ python2.4 /usr/bin/idle
> 
> Alternatively, create your own (executable) idle or pydoc with a
> shebang that points permanently at python2.4. For example:
> 
> file: $HOME/bin/idle2.4
> -----------------------------------
> #!/usr/bin/python2.4
> 
> from idlelib.PyShell import main
> if __name__ == '__main__':
>     main()
> -----------------------------------
> 
> Then if $HOME/bin is on your PATH, you can simply run: idle2.4

This change worked. Thanks !

> 
> 
>>The problem is then using IDLE and pydoc for Python2.4 since neither
>>are .py scripts
> 
> 
> Really?! What are they on Fedora, then?

I realized they are links to the respective idle2.4.py and pydoc2.4.py 
scripts.


From pythonista at gmail.com  Thu Apr  7 18:40:19 2005
From: pythonista at gmail.com (Sean Blakey)
Date: Thu, 7 Apr 2005 15:40:19 -0700
Subject: within a class, redefining self with pickled file
In-Reply-To: <1112912826.542938.48500@o13g2000cwo.googlegroups.com>
References: <1112912826.542938.48500@o13g2000cwo.googlegroups.com>
Message-ID: <372a762405040715406bacd554@mail.gmail.com>

On 7 Apr 2005 15:27:06 -0700, syd <syd.diamond at gmail.com> wrote:
> def unpickle(self):
>   self = pickle.load(open(self.getFilePath('pickle')))
> 
> This evidently does not work.  Any idea why?  I'd like to be able to
> replace a lightly populated class (enough to identify the pickled
> version correctly) with it's full version that's sitting pickled in a
> file.
> 
> As of right now, I need to just return self and redefine the class.
> 
> Thanks!
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

This problem has nothing to do with pickling. In general, assigning to
a parameter (even self) will not make a change that lasts after the
method call. For example:

>>> class A:
...     def change(self):
...         self = "something else entirely"
...
>>> a = A()
>>> a.change()
>>> a
<__main__.A instance at 0x009DCD00>

Note, however, that you can MODIFY self in-place within a method. You
can probably hack together a solution that modifies self.__dict__,
self.__class__, self.__class__.__dict__, or some other magic
properties.
-- 
Sean Blakey
Saint of Mild Amusement, Evil Genius, Big Geek
Python/Java/C++/C(Unix/Windows/Palm/Web) developer
quine = ['print "quine =",quine,"; exec(quine[0])"'] ; exec(quine[0])


From rschroev_nospam_ml at fastmail.fm  Sun Apr 17 04:45:41 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 17 Apr 2005 08:45:41 GMT
Subject: Compute pi to base 12 using Python?
In-Reply-To: <mailman.2016.1113724848.1799.python-list@python.org>
References: <mailman.1821.1113383175.1799.python-list@python.org>	<7x3btui27t.fsf@ruckus.brouhaha.com>	<mailman.1868.1113444002.1799.python-list@python.org>	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
Message-ID: <Vmp8e.66673$Ze5.4755611@phobos.telenet-ops.be>

Dick Moores wrote:
> M.E.Farmer wrote at 23:18 4/14/2005:
> 
>> > >Using the GNU "bc" utility:
>> > >
>> > >   $ bc -l
>> > >   bc 1.06
>> > >   Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation,
>> Inc.
>> > >   This is free software with ABSOLUTELY NO WARRANTY.
>> > >   For details type `warranty'.
>> > >   scale = 3000    # number of output places wanted
>> > >   obase = 12      # output base
>> > >   print 4 * a(1)  # pi = 4*arctan(1)
> 
> 
> Wow! this got me the 3003 (changed from 3000) digits of pi to base 12 in 
> 60.8 secs. No, I didn't count them yet, nor am I sure they're correct. 
> But I'd bet on them..
> 
> Could someone remind me how to get the output of bc -l into a text file 
> on Windows? (I've tried employing " > pi3003.txt" in various ways) OR, 
> how to copy and paste from the command line window, or whatever that 
> window is called? (Sorry for the OT question.)

Works for me (using the Cygwin version though) when I do

C:\cygwin\bin\bc -l > pi12.txt

Otherwise, to copy from the command prompt window: open the system menu
(icon in the top left corner of the window) and choose Edit->Mark. Then
select what you want to copy and press Enter or choose Edit->Copy in the
system menu.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From no at spam  Wed Apr  6 17:36:42 2005
From: no at spam (D H)
Date: Wed, 06 Apr 2005 16:36:42 -0500
Subject: Calling a Perl Module from Python ( future direction of Python)
In-Reply-To: <mailman.1448.1112812981.1799.python-list@python.org>
References: <mailman.1448.1112812981.1799.python-list@python.org>
Message-ID: <yaqdnVPlkJnxy8nfRVn-sA@comcast.com>

gf gf wrote:
> Really!  That's a pity... Instead of trying to
> recreate a repository the size of CPAN, a Python
> interface to Perl modules is really called for.

CPAN modules are designed for Perl though.  There's pyperl like they 
mentioned but it's like speaking two languages at once.
It's not like the Java standard library or the .NET/Mono standard 
library that can be used easily with different languages.  For Python, 
see PyPI and the Vaults of Parnassus: http://www.python.org/pypi 
http://www.vex.net/parnassus/

> Instead of fretting over decorator syntax and
> lispiness, might I suggest that development efforts be
> directed to this?  Developers, are you listening? 
> Guido?

They are actually focusing more on the python standard library lately.


From radam2 at tampabay.rr.com  Wed Apr  6 14:04:31 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Wed, 06 Apr 2005 18:04:31 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<mailman.1412.1112744591.1799.python-list@python.org>
	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>
	<425394bd.436936831@news.oz.net>
Message-ID: <9rv7515o3o7fomvs5mlhnqrprb72n9arck@4ax.com>

On Wed, 06 Apr 2005 08:10:22 GMT, bokr at oz.net (Bengt Richter) wrote:

>I don't understand your seeming fixation with wrappers and wrapping.

Fixated implies, I'm stuck on a single thing, but I'm not. I am
learning as I go, and exploring some possibilities as well.  :-)

> That's not
>the only use for decorators. See Raymond Hettinger's optimizing decorators
>in the cookbook for instance. 

Thanks, I'll look for it.  Is it in the new edition?  I haven't picked
it up yet.

>Decorators are something like metaclasses for functions,
>with much more general possibilities than wrapping, IMO.

I'm not sure I see the metaclass relation.  What more general things
can be done with Decorators, that can't be done with a wrapper?

Wrapping, and the @decorator expressions, interest me because I see a
lot of potential in it's use, and so I'm trying to learn them, and at
the same time, there are things about the @ expression that seems (to
me), that it's not the most practical way to do what it was intended
for.  

On the plus side, it's kind of cute with the little curly thing
propped up on top of the function. It's a neat trick that it does what
it does with a minimal amount of changes to the language by taking
advantage of pythons existing function perimeter and object passing
properties. It saves a bit of typing because we don't have to retype
the function name a few times.  (Several people have referred to it as
'sugar', and now I am starting to agree with that opinion.)

On the minus side, it's not intuitive to use.  It is attached to the
function definitions so they are limited, they can't be easily
unwrapped and rewrapped without redefining the function also.  The
recursive nature of stacked @ statements is not visible.

So my opinion of @ as a whole is currently: -1


>I think you'll have to show some convincing use cases showing a clear
>advantage over current decoration coding if you want converts ;-)

What about the following?  :-)

# Using this simple wrapper class:
class wrapper(object):
    def __call__(self,x):
       # preprocess x
       x*=2 			# Make a change so we can see it
       result = self.function(x)
       # postprocuess result
       return result

# A function to apply the wrapper:
def wrap(function,wrapper):
    w = wrapper()
    w.function = function
    return w

# The function
def fn(x):
    return x

print fn(5)		# Before

# Wrapit.
fn = wrap(fn,wrapper)

print fn(5)		# After

# Unwrap it.
fn = fn.function

print fn(5)     # And back again

#prints
#5
#10
#5

It has several advantages over @ expression.  It doesn't need the
triple nested defines to get the function name and argument list, the
wrapper is simpler, It can be placed on a function and then removed,
when and where it's needed, instead of at the point where the function
is defined.

The following behaves more closely to the existing @ expression in
that it has the same nesting behavior for stacked wrappers.  

I'm looking into a way to do sequential non-nested stacked wrappers at
this point, where the output of one goes to the input of the next.
That can't be done currently with the @ decorator expression.

This stacks a list of 10 wrappers on 10 different functions and
reverses the order of the stack every other function. In this case
they are all the same, but they could all be differnt. 

Cheers,
Ron

#---start---
class wrapper(object):
    def __call__(self,*x):
        # preprocess
        x = [x[0]+1,] 
        print 'preprocess', x[0], self.args
        # call function
        result = self.function(*x)
        # postprocess
        result +=1
        print 'postprocess', result, self.args
        return result

def wrap(f,w,shape='forward'):
    if shape=='reverse':
        w.reverse()
    for ww in w:
        nw = wrapper()
        try:
            nw.args = ww[1]
        except TypeError:
            wf = ww[0]
        nw.function = f
        f = nw
    return f

# Make a list of ten wrappers with an id number as an additional
# wrapper perimeter.
w = []
for n in xrange(10):
    w.append((wrapper,n))
    
# Wrap 10 functions, 10 times, in reversing order.
def func0(x): return x
def func1(x): return x
def func2(x): return x
def func3(x): return x
def func4(x): return x
def func5(x): return x
def func6(x): return x
def func7(x): return x
def func8(x): return x
def func9(x): return x

func0 = wrap(func0,w)
func1 = wrap(func1,w,'reverse')
func2 = wrap(func2,w)
func3 = wrap(func3,w,'reverse')
func4 = wrap(func4,w)
func5 = wrap(func5,w,'reverse')
func6 = wrap(func6,w)
func7 = wrap(func7,w,'reverse')
func8 = wrap(func8,w)
func9 = wrap(func9,w,'reverse')

print func0(0)
print func1(0)
print func2(0)
print func3(0)
print func4(0)
print func5(0)
print func6(0)
print func7(0)
print func8(0)
print func9(0)

#--end--





From atoppen at screaminet.com  Mon Apr 11 10:38:37 2005
From: atoppen at screaminet.com (Alan Toppen)
Date: Mon, 11 Apr 2005 10:38:37 -0400
Subject: zlib and zipfile module in Python2.4
Message-ID: <425a8caf$1_1@127.0.0.1>

I was unable to use the ZipFile class in the zipfile module in Python2.4. I 
got an error that zlib could not be found. Comparing my Python 2.2 
installation I noticed Python 2.4 was missing a certain file: 
/usr/lib/python2.2/lib-dynload/zlibmodule.so. Unable to find a more elegant 
solution, I copied the file from my Python 2.2 directory into my Python 2.4 
directory. When running my Python script it gives a warning:

/usr/local/lib/python2.4/zipfile.py:7: RuntimeWarning: Python C API version 
mismatch for module zlib: This Python has C API version 1012, module zlib 
has version 1011.
  import zlib # We may need its compression method

But it works. Python 2.2 and 2.3 handle zipfiles out of the box. Could a 
file have been omitted from Python 2.4 by accident?



----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From bokr at oz.net  Mon Apr 11 18:20:31 2005
From: bokr at oz.net (Bengt Richter)
Date: Mon, 11 Apr 2005 22:20:31 GMT
Subject: args attribute of Exception objects
References: <mailman.1526.1112952761.1799.python-list@python.org>
	<pan.2005.04.08.16.07.30.85408@jerf.org>
	<8dad5312.0504110231.68f6a21b@posting.google.com>
Message-ID: <425ae097.133343848@news.oz.net>

On 11 Apr 2005 03:31:23 -0700, sdementen at hotmail.com (Sebastien de Menten) wrote:

>Jeremy Bowers <jerf at jerf.org> wrote in message news:<pan.2005.04.08.16.07.30.85408 at jerf.org>...
>> On Fri, 08 Apr 2005 09:32:37 +0000, S????bastien de Menten wrote:
>> 
>> > Hi,
>> > 
>> > When I need to make sense of a python exception, I often need to parse the 
>> > string exception in order to retrieve the data.
>> 
>> What exactly are you doing with this info? (Every time I started to do
>> this, I found a better way. Perhaps one of them will apply for you.)
>> 
>> (As a general comment, I'd point out that you don't have to check the
>> entire error message; checking for a descriptive substring, while still
>> not "safe", is at least safe*r*.)
>
>I have symbolic expressions in a dictionnary like:
>
>dct = dict( a = "b**2 + c", b = "cos(2.3) + sin(v)", v = "4", c =
>"some_very_expensive_function(v)")
>
>I want to build a function that finds the links between all those
>expressions (think about computing dependencies between cells in a
>spreadsheet).
>
Here's a way of finding the symbols being used in the expressions, and dependencies:
(no guarantees, I haven't explored any special corner cases or caught syntax errors etc ;-)

And note that eval is not safe even for expressions, if you don't know what's in the string.
A safer approach would be to use compiler.parse and a visitor to extract names from the ast.

 >>> dct = dict(
 ...     a = "b**2 + c",
 ...     b = "cos(2.3) + sin(v)",
 ...     v = "4",
 ...     c = "some_very_expensive_function(v)")
 >>>
 >>> symdep = dict((sym, sorted(eval('lambda:'+expr).func_code.co_names)) for sym, expr in dct.items())
 >>>
 >>> def tree(startsym, depdict):
 ...     seen = set()
 ...     def _tree(sym, level=0):
 ...         print '%s%s'%('    '*level, sym)
 ...         seen.add(sym)
 ...         for dep in depdict.get(sym, []): _tree(dep, level+1)
 ...     for sym in sorted(depdict.keys()):
 ...         if sym in seen: continue
 ...         _tree(sym)
 ...
 >>> tree(sorted(symdep.keys())[0], symdep)
 a
     b
         cos
         sin
         v
     c
         some_very_expensive_function
         v

Skipping fancy visitor stuff ;-), getting names brute force from the ast, should be safer
than eval('lambda:'+expr).func_code.co_names):
(not tested beyond what you see ;-)

 >>> def getnames(expr):
 ...     ast = compiler.parse(expr, 'eval')
 ...     names = []
 ...     def descend(node):
 ...         if isinstance(node, compiler.ast.Name): names.append(node.name)
 ...         if not hasattr(node, 'getChildren'): return
 ...         for child in node.getChildren(): descend(child)
 ...     descend(ast)
 ...     return sorted(names)
 ...
 >>> getnames('a*b+c**foo(x)')
 ['a', 'b', 'c', 'foo', 'x']
 >>> for v,x in sorted(dct.items()):
 ...     print '%5s: %s'%(v, getnames(x))
 ...
     a: ['b', 'c']
     b: ['cos', 'sin', 'v']
     c: ['some_very_expensive_function', 'v']
     v: []

>All I do is:
>def link(name):
>   dependencies = {}
>   while True:
>      try:
>         eval(dct[name], globals(), dependencies)
>      except NameError,e:
>         dependencies[e.args[0][6:-16]] = 1
>      else:
>         return dependencies
>
>globals() can be replaced by a custom dictionnary for security
>purposes.
I would use something  getnames above, and put getnames(expr)
in the expression for symdep = dict(...) in place of
sorted(eval('lambda:'+expr).func_code.co_names))

>variation on the theme can:
>  - check SyntaxError and give interlligent feedback to user (BTW,
>SyntaxError args are much smarter)
compiler.parse will raise SyntaxError in getnames, so you could make your own message, e.g.,

 >>> try: getnames('a*b+c***foo(x)') # *** is syntax error
 ... except SyntaxError, e:
 ...     print 'SyntaxError: %s<<--BROKE HERE-->>%s' % (e.text[:e.offset], e.text[e.offset:])
 ...
 SyntaxError: a*b+c***<<--BROKE HERE-->>foo(x)


>  - find or/and eval recursively the whole tree and keep in cache
>values,...
>
HTH

Regards,
Bengt Richter


From goandspamyourself at doamin.com  Fri Apr  8 08:31:09 2005
From: goandspamyourself at doamin.com (Dylan Wilson)
Date: Fri, 08 Apr 2005 12:31:09 GMT
Subject: compound strip() string problem
Message-ID: <hQu5e.3927$5F3.3909@news-server.bigpond.net.au>

Hi,
I'm new to python and i have a string problem.
My problem is this
--------------------------------------------------------------------------
 >>>import time
 >>>time = time.asctime()
 >>>time
'Fri Apr 08 22:14:14 2005'
 >>>ti = time[0:13]
 >>>me = time[14:16]
 >>>time = ti + me
 >>>time
'Fri Apr 08 2214'
--------------------------------------------------------------------------
Now i need to compond that string remove the whitespace if you will.Well
i read up on strip(), lstrip() and rstrip() and all i could deduce was 
that they striped the whitespace from the start and/or end of the 
string.But I tried that anyway and failed.Is there an easier way than i 
did it below? I'm sorry it's ugly and tedious.
--------------------------------------------------------------------------
#!/bin/bash/env python

import os, time

#Figure out what os this is
platform = os.name

#Create string with date, time and extension for our pcap file
ext = '.out'
time = time.asctime()
ti = time[0:13]       #
me = time[14:16]     #
time = ti + me      #There has to be a better way to do this?
fo = time[0:3]       #
rm = time[4:7]        #
at  = time[11:18]
time = fo + rm + at + ext

#Get rid of yukkies
del ti, me, ext, fo, rm, at

#create command string
flag = '-w'
wincommand = 'c:/progra~1/ethereal/tethereal'
lincommand = '/usr/sbin/./tethereal'

#run tethereal and send the output to a pcap file DDDMMMHHMM.out

if platform == 'nt':
     os.system('%s %s %s' % (wincommand, flag, time))

if platform == 'posix':
     os.system('%s %s %s' % (lincommand, flag, time))
--------------------------------------------------------------------------
Thanks,
Dylan


From ark at acm.org  Sat Apr  2 10:58:57 2005
From: ark at acm.org (Andrew Koenig)
Date: Sat, 02 Apr 2005 15:58:57 GMT
Subject: instance name
References: <99z3e.1157607$35.42889387@news4.tin.it>
Message-ID: <5jz3e.504252$w62.286883@bgtnsc05-news.ops.worldnet.att.net>

"max(01)*" <max2 at fisso.casa> wrote in message 
news:99z3e.1157607$35.42889387 at news4.tin.it...

> is there a way to define a class method which prints the instance name?

The term "the instance name" is misleading, because it assumes, without 
saying so explicitly, that every instance has a unique name.

In fact, there is no reason that an instance needs to have a name at all, or 
that it should have only one.

You gave this example:

    instance_1 = class_1()
    instance_1.myName()

but what if I did this instead?

    class_1().myName()

Or this?

    instance_1 = class_1()
    instance_2 = instance_1
    instance_2.myName()




From dmbkiwi at yahoo.com  Tue Apr 26 05:21:58 2005
From: dmbkiwi at yahoo.com (Dumbkiwi)
Date: Tue, 26 Apr 2005 21:21:58 +1200
Subject: kdialog and unicode
Message-ID: <pan.2005.04.26.09.21.55.862042@yahoo.com>

I'm trying to get python, unicode and kdialog to play nicely together.
This is a linux machine, and kdialog is a way to generate dialog boxes in
kde with which users can interact (for example input text), and you can
use the outputted text in your script.

Anyway, what I'm doing is reading from a utf-8 encoded text file using the
codecs module, and using the following:

data = codecs.open('file', 'r', 'utf-8')

I then manipulate the data to break it down into text snippets.

Then I run this command:

>>> test = os.popen('kdialog --inputbox %s' %(data))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode character u'\u017a' in
position 272: ordinal not in range(128)

I would really like kdialog display the text as utf-8.  However, it seems
that python is trying to pass the utf-8 encoded data as ascii, which
obviously fails because it can't deal with the utf-8 encoded text.  Is it
possible to pass the text out to kdialog as utf-8, rather than ascii?

Or have I completely misunderstood the whole process, in which case, can
you please enlighten me.

Matt


From bjgol at yahoo.com  Thu Apr 14 21:51:08 2005
From: bjgol at yahoo.com (Brett)
Date: Thu, 14 Apr 2005 20:51:08 -0500
Subject: Rookie Question: Passing a nested list into a function? 
Message-ID: <oIWdnebQUt6Tg8LfRVn-sw@comcast.com>

I am trying to pass the value of a nested list into a function (to my "if" 
statement) as follows:

textfilelist = [["titlelist1[x][1]"]]
def idfer(listlength, comparelistlength, list):
        while x < (listlength - 1):
                       while y < comparelistlength:
                            if list == titlelist2[y][1]:
(I cutoff the end to focus on the problem)

#Here i call my function hoping i am passing the value within 
textfilelist[0][0] to my function
idfer(textfilelist[0][1], textfilelist[1][1], textfilelist[0][0])


--------------
I don't if there is a "legal" way to do this, but I would appreciate some 
guidance.

Thanks,

Brett




From radam2_ at _tampabay.rr.com  Sun Apr 17 16:02:19 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Sun, 17 Apr 2005 20:02:19 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<1113727574.834162.10650@l41g2000cwc.googlegroups.com>
Message-ID: <6a5561tipe85c3v3va36e9v8ulgq23paj2@4ax.com>

On 17 Apr 2005 01:46:14 -0700, "Kay Schluehr" <kay.schluehr at gmx.net>
wrote:

>Ron_Adam wrote:
>
>> I sort of wonder if this is one of those things that looks like it
>> could be useful at first, but it turns out that using functions and
>> class's in the proper way, is also the best way. (?)
>
>I think Your block is more low level. 

Yes, that's my thinking too.  I'm sort of looking to see if there is a
basic building blocks here that can be used in different situations
but in very consistent ways.  And questioning the use of it as well.  

>It is like copying and pasting
>code-fragments together but in reversed direction: ...

Yes, in a function call, you send values to a remote code block and
receive back a value.

The reverse is to get a remote code block, then use it.  

In this case the inserted code blocks variables become local, So my
point is you don't need to use arguments to pass values. But you do
need to be very consistent in how you use the code block.  (I'm not
suggesting we do this BTW)

The advantage to argument passing in this case would be that it puts a
control on the block that certain arguments get assigned before it
gets executed.

Is it possible to have a tuple argument translation independently of a
function call?  This would also be a somewhat lower level operation,
but might be useful, for example at a certain point in a program you
want to facilitate that certain values are set, you could use a tuple
argument parser to do so.  It could act the same way as a function
call argument parser but could be used in more places and it would
raise an error as expected.  Basically it would be the same as:

    def argset(x,y,z=1):
        return x,y,z

But done in a inline way.

    a,b,c = (x,y,z=1)    	# looks familiar doesn't it.  ;-)

As an inline expression it could use '%' like the string methods,
something like this?

	(x,y,z=1)%a,b,c			# point x,y,z to a,b,c (?)


And combined with code chunks like this.

    def chunk:				# code chunk, ie.. no arguments.
		# set (x,y)			# informal arguments commented
		return x+y			# return a value for inline use 

	value = (x,y)%a,b: chunk	# use local code chunk as body

I think this might resemble some of the suggested lambda replacements.


The altenative might be just to have functions name space imported as
an option.  

    def f(x,y):
        return x+y

    z = dolocal f(1,2)   #But why would I want to do this?

I think these pre-peps are really about doing more with less typing
and don't really add anything to Python.  I also feel that the
additional abstraction when used only to compress code, will just make
programs harder to understand.

>You have to change all the environments that use the thunk e.g.
>renaming variables. It is the opposite direction of creating
>abstractions i.e. a method to deabstract functions: introduce less
>modularity and more direct dependencies. This is the reason why those
>macros are harmfull and should be abandoned from high level languages (
>using them in C is reasonable because code expansion can be time
>efficient and it is also a way to deal with parametric polymorphism but
>Python won't benefit from either of this issues ).
>
>Ciao,
>Kay

I agree. If a code block of this type is used it should be limited to
within the function it's defined in. The advantage, if it's used in a
bare bones low level way with no argument passing, would be some
performance benefits over function calls in certain situations. That
is, a small reusable code block without the function call overhead.
But only use it in the local name space it's defined in.  Otherwise
use a function or a class.

Cheers,
Ron



From bill.mill at gmail.com  Wed Apr 20 09:19:55 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 20 Apr 2005 09:19:55 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <797fe3d4050420061947e417d6@mail.gmail.com>

On 20 Apr 2005 12:52:19 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
> Op 2005-04-20, Torsten Bronger schreef <bronger at physik.rwth-aachen.de>:
> > Hall?chen!
> >
> > nde at no.spam.org (Nick Efford) writes:
> >
> >> seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
> >>> Many people I know ask why Python does slicing the way it does.....
> >>
> >>> Can anyone /please/ give me a good defense/justification???
> >>
> >>> I'm referring to why mystring[:4] gives me elements 0, 1, 2 and 3
> >>> but *NOT* mystring[4] (5th element).
> >>
> >> mystring[:4] can be read as "the first four characters of
> >> mystring".  If it included mystring[4], you'd have to read it as
> >> "the first five characters of mystring", which wouldn't match the
> >> appearance of '4' in the slice.
> >>
> >> [...]
> >>
> >> It all makes perfect sense when you look at it this way!
> >
> > Well, also in my experience every variant has its warts.  You'll
> > never avoid the "i+1" or "i-1" expressions in your indices or loops
> > (or your mind ;).
> >
> > It's interesting to muse about a language that starts at "1" for all
> > arrays and strings, as some more or less obsolete languages do.  I
> > think this is more intuitive, since most people (including
> > mathematicians) start counting at "1".  The reason for starting at
> > "0" is easier memory address calculation, so nothing for really high
> > level languages.
> 
> Personnaly I would like to have the choice. Sometimes I prefer to
> start at 0, sometimes at 1 and other times at -13 or +7.
> 

-1. You can start arrays at 0 or 1 (and arbitrary bases? I don't
recall) in VB, and it's an unmitigated disaster. It adds needless
complexity. What our slicing system loses in elegance in a few cases,
it more than makes up for in consistency throughout all programs.

Peace
Bill Mill
bill.mill at gmail.com


From jacob at cd.chalmers.se  Mon Apr 25 13:41:32 2005
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: 25 Apr 2005 17:41:32 GMT
Subject: Europython 2005 registration open
Message-ID: <mailman.2534.1114537968.1799.python-announce-list@python.org>

EuroPython is held -for the second time- in G?teborg, Sweden, during
the week of June 27-29, 2005.  Registration is open and now is your
chance to submit a proposal (or more).

Several topics are handled in parallel tracks at EuroPython2005, these
include: Business, Education, Lightning talks, Python Frameworks,
Python Language, Refereed papers, Science, Social skills/General
topics, Tutorials/Neopythes, Zope and Zope Related, Zope Lightning
talks. If you would like to tell the community something about your
work, interest or experience, then then submit button is your way to
go.

The Refereed Track is intended for prestigious peer-reviewed talks for
presenting technical and scientific papers. To our knowledge,
EuroPython is the only Python conference, with peer-reviewed
talks. Everybody can submit a paper for the Refereed Track, as long as
it follows the Refereed paper instructions. For detailed information
concerning this subject, please have a look at the Tracks & Talks
webpage of EuroPython. To give you yet another opportunity to submit a
refereed paper, we have extended the deadline to coincide with the
deadline for regular talks. Lat day for submission is 1 May 2005!

If you don't want to participate as a speaker, you might be interested
in hearing the talks. Registration for EuroPython2005 is now
open. Several registration alternatives are possible. Pre-Registration
will be available until 17th of June, but Early Bird registration will
end on May the 15th. Everybody is welcome: from novice to advanced.

Our keynote speakers will be Guido van Rossum and Steve Pemberton.
You may not have heard of Steve, since his focus is in an area that is
not directly connected to Python. However, we expect him to give you
an interesting perspective on what is going on in the industry.
Find out more at http://homepages.cwi.nl/~steven/.
If you don't know who Guido van Rossum is, you really need to come to
Europython to find out.

Feel free to spread the word about EuroPython2005 to your friends, family,
colleagues, ...

For all conference details, go to:
http://www.europython.org

See you at G?teborg.

EuroPython Team.

About EuroPython: Europython is an annual conference for the Python
and Zope communities. It circulates between different sites in
Europe. Having started in Charleroi, Belgium, it is now in G?teborg,
Sweden and will move to CERN in Swizerland next year. Europython is a
community conference run by volunteers.

-- 


From jerf at jerf.org  Wed Apr 27 15:10:52 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 27 Apr 2005 15:10:52 -0400
Subject: tkinter text width
References: <mailman.2550.1114560111.1799.python-list@python.org>
	<opspvwqxd4rqur0o@eb.pragmadev>
	<mailman.2593.1114624338.1799.python-list@python.org>
Message-ID: <pan.2005.04.27.19.10.51.37432@jerf.org>

On Wed, 27 Apr 2005 10:52:14 -0700, James Stroud wrote:
> This is more or less what I would like, but I would also like to probe the 
> Text to see how many characters it thinks it can display within the container 
> window. I am formatting text dynamically and so I rely on the width. I am not 
> after the built in "wrap" option, it does not do what I want. But, say if 
> wrap were turned on, it would be good to know how many characters the Text 
> would wrap at.

I have extensive experience with trying to get text containers to do this.
It is not easy. You have two choices:

1. Give up. You can't tell anyhow if you're using a proportional font.

2. Use a fixed-width font and manually wrap. (It's pretty easy then, you
can ask the font for how wide any char is and do the math from there.)

I have 70 line function that tries to replicate the Tk wrapping algorithm
in the proportional text case, and it *still* doesn't work. For one thing,
I actually found some bugs in the wrapping code (if a Unicode character
gets into just the right position, it can actually run off the right end
of the text widget, even if the widget is being wrapped), so completely
matching the layout seems infeasible.

I would strongly, strongly suggest finding another way to do what you are
trying to do. I have blown many, many hours on this problem, and I found
no simple logic. The edge cases kill you; while Tk is consistent (same
text, same wrap every time), sometimes it wraps a word if it goes up to
the edge, sometimes if it's one pixel off, damned if I can find a pattern
(probably has something to do with trying to space the letters out,
kerning or one of its simpler friends), and it probably changes
periodically anyhow... and note based on this I can't even guarantee #2
above, if you get unlucky.

Basically, I'm pretty sure you can't do this.



From greg at cosc.canterbury.ac.nz  Sun Apr  3 23:40:22 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Mon, 04 Apr 2005 15:40:22 +1200
Subject: string goes away
In-Reply-To: <1112569085.884702.165410@o13g2000cwo.googlegroups.com>
References: <mailman.1156.1112322721.1799.python-list@python.org>
	<Xns962B5D9DAB99Eduncanrcpcouk@127.0.0.1>
	<87d5tcouct.fsf@pobox.com>
	<1112569085.884702.165410@o13g2000cwo.googlegroups.com>
Message-ID: <3bbr9jF69t2nnU1@individual.net>

Dan Bishop wrote:
> John J. Lee wrote:
>
>>Doesn't work with unicode, IIRC.
> 
>>>>u" ".join(["What's", "the", "problem?"])
> 
> u"What's the problem?"

str.join(x, y) isn't quite a drop-in replacement for
string.join(y, x), since it's not polymorphic on the
joining string:

 >>> str.join(u" ", ["a", "b"])
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: descriptor 'join' requires a 'str' object but received a 'unicode'

The strings being joined can be unicode, though:

 >>> str.join(" ", [u"a", u"b"])
u'a b'

So it's probably not a serious problem, since in most
cases you'll know whether the joining string is unicode
or not when you write the code. If not, you'll just
have to do it the "new" way.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From michele.simionato at gmail.com  Mon Apr  4 12:19:11 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 4 Apr 2005 09:19:11 -0700
Subject: "specialdict" module
In-Reply-To: <3bb433F6fn6t3U1@individual.net>
References: <3bamhhF6j009lU1@individual.net>
	<mailman.1264.1112560102.1799.python-list@python.org>
	<3bb433F6fn6t3U1@individual.net>
Message-ID: <1112631551.683072.80970@f14g2000cwb.googlegroups.com>

About not using super: you might have problems in multiple inheritance.
Suppose I want to use both your defaultdict and a thirdpartdict. A
subclass

class mydict(defaultdict, thirdpartdict):
   pass

would not work if thirdpartdict requires a non-trivial __init__ , since
without super in defaultdict.__init__ you would just call dict.__init__
and not thirdpartdict.

            Michele Simionato



From jack at performancedrivers.com  Sat Apr 23 16:21:58 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Sat, 23 Apr 2005 16:21:58 -0400
Subject: Using Ming on Windows
In-Reply-To: <d4ea01$m02$1@sea.gmane.org>
References: <d4ea01$m02$1@sea.gmane.org>
Message-ID: <20050423202158.GD14995@performancedrivers.com>

On Sat, Apr 23, 2005 at 05:13:29PM -0300, Andr? Roberge wrote:
> I tried to install Ming
> (http://sourceforge.net/projects/ming/)
> on Windows to use with Python *but*
> I can't [/don't know how to] use "make" to install it.
> 
> Does anyone know where I could find a ready-made compiled
> version for Windows to just "put in" my site-packages directory.
> 
> Any help would be appreciated.
> 
Ming seems to be abandoded/unsupported.  Use groups.google.com to
find some hints on how to install it.  I've done it on linux, but
never tried on windows (why would I?) and replied with some
suggestions last time it came up on c.l.py

-jackdied


From petite.abeille at gmail.com  Sat Apr  9 15:25:54 2005
From: petite.abeille at gmail.com (PA)
Date: Sat, 9 Apr 2005 21:25:54 +0200
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
 =?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
 =?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
 =?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
 =?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
 =?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
 =?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
 =?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
 =?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60_=28newsgroup-post_127=29?=
In-Reply-To: <1113074212.618866.24620@f14g2000cwb.googlegroups.com>
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
	<1113074212.618866.24620@f14g2000cwb.googlegroups.com>
Message-ID: <8a2b6ac58e47e399defb8488bd4fe943@gmail.com>


On Apr 09, 2005, at 21:16, Soy Bomb wrote:

> Sounds like the USA 2005.

http://images.ucomics.com/comics/nq/2005/nq050329.gif

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From ville at spammers.com  Tue Apr 12 05:15:36 2005
From: ville at spammers.com (Ville Vainio)
Date: 12 Apr 2005 12:15:36 +0300
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
Message-ID: <du7d5t0gxtz.fsf@lehtori.cc.tut.fi>

>>>>> "Sizer" == Sizer  <sizer at nospam.com> writes:

    Sizer> Looking at my followup, I really didn't make it clear that
    Sizer> you'll have to learn some bash scripting to be an effective
    Sizer> *nix administrator, just because so many parts of the
    Sizer> system use bash scripting. But python is much nicer to
    Sizer> write anything non-trivial in.

If you don't need to edit already existing system scripts, you don't
really need to know bash scripting. For debugging purposes, it's easy
to see what commands the script executes to perform a task.

You just need to know about `backticks` and $ENV_VARS, but that's more
general Unix knowledge than actual shell scripting.

So IMHO learning bash scripting might be a waste of time, and it
should be learnt 'as you go' - i.e. if/when you eventually bump into a
problem where you need to be able to do bash scripting. There's the
'Unix romantic' movement that still thinks shell scripts are a good
idea, but this is my .02EUR to point out that not everyone agrees with
them.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From __peter__ at web.de  Wed Apr 20 15:53:49 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 20 Apr 2005 21:53:49 +0200
Subject: What's the difference between these 2 statements?
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
	<1114026007.999930.12850@f14g2000cwb.googlegroups.com>
Message-ID: <d46bvt$2l9$01$1@news.t-online.com>

ahmedt at gmail.com wrote:

> so if I want to reverse it fully using s[len(s)-1:x:-1] what would x be
> or is it impossible to express it in this way ?

This does not work for integers, because the theoretically correct value 
x = -1 already has another interpretation as the gap between the last and
the last but one character. Here are two workarounds:

1. Set x to None

>>> s = "12345"
>>> s[len(s):None:-1]
'54321'

2. Separate slicing operation and reversal:

>>> s = "12345"
>>> s[0:len(s)][::-1]
'54321'

Peter



From rdsteph at mac.com  Sun Apr  3 10:58:38 2005
From: rdsteph at mac.com (rdsteph at mac.com)
Date: 3 Apr 2005 07:58:38 -0700
Subject: Python Cookbook
In-Reply-To: <mailman.1257.1112537406.1799.python-list@python.org>
References: <mailman.1257.1112537406.1799.python-list@python.org>
Message-ID: <1112540318.873364.302160@g14g2000cwa.googlegroups.com>

I want to just second this comment by Heike. I received my copy of the
2nd Edition from O'Reilly on Friday. I am still working my way slowly
through the first chapter on Text, and  I am nearing the end of that
chapter.

I intend to work my way through sequentially, because I can't think of
a better way to improve my understanding of intelligent usage of
Python. So far, even the recipes and discussions that are reach-out and
difficult for me are beginning to make sense after I read carefully and
sometimes re-read the discussions. I couldn't ask for better
instruction, and the effort I make to learn is richly rewarded.

I know that the material will become considerably more complex as I
move deeper into the book, but the work of the authors and editors in
chapter one gives me faith that I can make progress as I go, as long as
I make the effort to really try to understand each recipe's discussion.


This will no doubt be a valued reference work, but I am finding it to
be a uniquely rewarding educational experience.

Ron Stephens
www.awaretek.com/plf.html



From sidharth.kuruvila at gmail.com  Sat Apr  9 05:53:49 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Sat, 9 Apr 2005 15:23:49 +0530
Subject: How to check whether a list have specific value exist or not?
In-Reply-To: <d387jl$4h3$1@sea.gmane.org>
References: <20050409093226.96954.qmail@web8402.mail.in.yahoo.com>
	<d387jl$4h3$1@sea.gmane.org>
Message-ID: <2ab2ed55050409025332b02888@mail.gmail.com>

Hi Prabha,

if 3 in [1, 2, 3, 4]:
    print "yes"


Python is an amazing language if you understand that it is actually
quite a bit different from php. The python tutorial is pretty good, I
suggest you go through it.


On Apr 9, 2005 3:07 PM, Michael Spencer <mahs at telcopartners.com> wrote:
> praba kar wrote:
> > Dear All
> >      In Php we can find in_array() function
> > which function is mainly useful to check
> > whether a specific value is exist in the array
> > or not.
> >
> >    But In python In cannot find any function
> > like that.  I want to check a list have specific
> > value or not. So If any one know regarding this
> > mail me
> >
> > with regards
> > PRabahar
> >
> >
> > ________________________________________________________________________
> > Yahoo! India Matrimony: Find your life partner online
> > Go to: http://yahoo.shaadi.com/india-matrimony
> 
> No need to ask this list, ask the built-in one:
> 
>   >>> dir(list)
>   ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__',
> '__delslice__', '__doc__', '__eq__', '__ge__', '__getattribute__',
> '__getitem__', '__getslice__', '__gt__', '__hash__', '__iadd__', '__imul__',
> '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__',
> '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__',
> '__rmul__', '__setattr__', '__setitem__', '__setslice__', '__str__', 'append',
> 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']
> 
> A minute of two experimenting, would then lead you to:
> 
>   >>> l = [1,2,3,4,5]
>   >>> l.index(3)
>   2
>   >>>
> 
> Note that all indexing in Python is 0-based
> 
> Michael
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From http  Wed Apr 13 22:05:01 2005
From: http (Paul Rubin)
Date: 13 Apr 2005 19:05:01 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
Message-ID: <7xoeci3ygi.fsf@ruckus.brouhaha.com>

Dick Moores <rdm at rcblue.com> writes:
> I don't believe GNU "bc" is available for Windows, is it?

I don't know.  It probably works ok under Cygwin at least.


From Domenique.Tilleuil at gmail.com  Thu Apr 21 05:26:47 2005
From: Domenique.Tilleuil at gmail.com (Domenique.Tilleuil at gmail.com)
Date: 21 Apr 2005 02:26:47 -0700
Subject: pyGTK on Mouse over event ?
In-Reply-To: <4266ce05$0$7200$626a14ce@news.free.fr>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
	<4266baf3$0$7208$626a14ce@news.free.fr>
	<1114029300.082094.293410@g14g2000cwa.googlegroups.com>
	<4266ce05$0$7200$626a14ce@news.free.fr>
Message-ID: <1114075607.747353.74180@o13g2000cwo.googlegroups.com>

the POINTER MOTION MASK doesn't do the trick either. This is the first
time i'm using python and pyGTK and it's really sad to see that a
simple mouseover is hard to program. :s



From peer.griebel at web.de  Mon Apr 18 10:46:28 2005
From: peer.griebel at web.de (Peer Dr. Griebel)
Date: Mon, 18 Apr 2005 16:46:28 +0200
Subject: Working with method-wrapper objects
Message-ID: <1829340036@web.de>

Hi,

I'm currently working on a Python Management Console.
During inspection of my objects I stumbled over method-wrapper objects.
Such an object may be obtained e.g. as 

    method_wrapper = [].__str__

My problem is: This object is not a method, not a function, not a
method descriptor. And it is not a routine according to inspect.py.

So how do I work with it?  I would like to be able to detect it.  And
I would like to be able to issue a inspect.getargspec() on it.


As we are at it: I have a similar problem with
builtin_function_or_method's.  These objects can't be inspected by
getargspec().  So is there some way to determine the argspec in some way?

Thanks
  Peer

__________________________________________________________
Mit WEB.DE FreePhone mit hoechster Qualitaet ab 0 Ct./Min.
weltweit telefonieren! http://freephone.web.de/?mc=021201



From usenet at gungfu.de  Mon Apr 25 09:14:44 2005
From: usenet at gungfu.de (=?iso-8859-1?q?Steffen_Gl=FCckselig?=)
Date: 25 Apr 2005 06:14:44 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <1114434884.847759.238940@l41g2000cwc.googlegroups.com>

Perhalps metaclasses are of interest to you. You can decorate existing
methods with additional behavior using metaclasses. A simple example
can be found at http://soiland.no/software/logmeta
I've gathered some more links under
http://www.gungfu.de/facts/wiki/field.php?pagename=Main.MetaProgramming


regards
Steffen



From grante at visi.com  Fri Apr 15 10:21:46 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 15 Apr 2005 14:21:46 -0000
Subject: Get OS name
References: <mailman.1967.1113574056.1799.python-list@python.org>
	<1113574675.170849.111260@f14g2000cwb.googlegroups.com>
Message-ID: <115vjfq231k6957@corp.supernews.com>

On 2005-04-15, codecraig <codecraig at gmail.com> wrote:

> where can I get wmi module, it doesnt come with Python right?

http://www.google.com/search?q=python+wmi+module

-- 
Grant Edwards                   grante             Yow!  ... I want a COLOR
                                  at               T.V. and a VIBRATING BED!!!
                               visi.com            


From modelnine at ceosg.de  Mon Apr  4 11:13:45 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 17:13:45 +0200
Subject: boolean -> DNF
In-Reply-To: <ad97512905040406083068108c@mail.gmail.com>
References: <ad97512905040406083068108c@mail.gmail.com>
Message-ID: <200504041713.48171.modelnine@ceosg.de>

Am Montag, 4. April 2005 15:08 schrieb Alex Polite:
> I'd like to skip BoolStuff and do it all in python but I have no idea
> where to start. Anyone out there with a PhD in computer science that
> can give me a starting point?

I once wrote a library which implemented parsing boolean expressions (with a 
simple homegrown parser) and reprinting the tree (to print it in DNF-Form is 
a pretty simple algorithm once you have the tree structure, I didn't 
implement this, but if you ask me I will).

I don't have access to it at the moment (because I created it at home), but 
I'll send it to you tonight if you just contact me off-list.

-- 
--- Heiko.
listening to: Nine Inch Nails - The Wretched
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From mefjr75 at hotmail.com  Sat Apr 16 14:28:15 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 16 Apr 2005 11:28:15 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<2ab23d7a.0504160648.2bcbfa9f@posting.google.com>
Message-ID: <1113676095.558321.204570@l41g2000cwc.googlegroups.com>

Glad you are making progress ;)

>I give you a brief example of the xref output (taken from your >code,
>also if the line numbers don't match, because I modified >your code,
>not beeing interested in eof's other than Linux).

What happens when you try to analyze a script from a diffrent os ? It
usually looks like a skewed mess, that is why I have added EOL
conversion so it is painless for you to convert to your eol of choice.
The code I posted consist of a class and a Main function.
The class has three methods.
 __init__ is called by Python when you create an instance of the class
Stripper.  All __init__ does here is just set a class variable self.raw
.
format is called explicitly with a few arguments to start the
tokenizer.
__call__ is special it is not easy to grasp how this even works.. at
first.
In Python when you treat an instance like a function, Python invokes
the __call__method of that instance if present and if it is callable().
example:
         try:
            tokenize.tokenize(text.readline, self)
        except tokenize.TokenError, ex:
            traceback.print_exc()
The snippet above is from the Stripper class.
Notice that tokenize.tokenize is being feed a reference to self ( if
this code is running self is an instance of Stripper ).
tokenize.tokenize is really a hidden loop.
Each token generated is sent to self as five parts toktype, toktext,
(startrow,startcol), (endrow,endcol), and line. Self is callable and
has a __call__  method so tokenize sends really sends the five part
info to __call__ for every token.
If this was obvious then ignore it ;)

M.E.Farmer



From cfriedl at bigpond.net.au  Wed Apr 27 19:59:44 2005
From: cfriedl at bigpond.net.au (cfriedl at bigpond.net.au)
Date: 27 Apr 2005 16:59:44 -0700
Subject: suggestions on how to do this
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
	<426fe037.64166596@news.oz.net>
Message-ID: <1114646384.201298.35570@g14g2000cwa.googlegroups.com>

Hi Bengt

OK, that's right. So I'm curious how you did this. And any comments on
how to collect coefficients of like powers in your result.

Be Well and Happy Always

Chris



From gsakkis at rutgers.edu  Sun Apr  3 04:20:32 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 3 Apr 2005 00:20:32 -0800
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<1112466233.403989.125810@l41g2000cwc.googlegroups.com>
	<b8lu411dfphm8lbc6tc5anpq9m2tn3qlef@4ax.com>
Message-ID: <1112516432.638697.193840@o13g2000cwo.googlegroups.com>

Yes, it is possible to turn off type checking at runtime; just add this
in the beginning of your define:

def define(func):
    if not ENABLE_TYPECHECKING:
        return lambda func: func
    # else decorate func

where ENABLE_TYPECHECKING is a module level variable that can be
exposed to the module's clients. In my module, the default is
ENABLE_TYPECHECKING = __debug__.


George



From anna at tin.org  Mon Apr  4 16:36:36 2005
From: anna at tin.org (anna at tin.org)
Date: Mon, 4 Apr 2005 13:36:36 -0700
Subject: hello
Message-ID: <20050405022258.B3E381E4006@bag.python.org>

The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.


From modelnine at ceosg.de  Mon Apr  4 15:38:16 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 21:38:16 +0200
Subject: help with python-devel!!!
In-Reply-To: <20050404185454.93863.qmail@web26806.mail.ukl.yahoo.com>
References: <20050404185454.93863.qmail@web26806.mail.ukl.yahoo.com>
Message-ID: <200504042138.19984.modelnine@ceosg.de>

Am Montag, 4. April 2005 20:54 schrieb John Ridley:
> The OP mentioned that urpmi couldn't find a package by that name. So it
> might be worth querying for "libpython" if that fails:

This is why why I don't use a binary distribution... :-) (Differences in) 
Naming makes getting at devel-packages a guessing-game at best.

-- 
--- Heiko.
listening to: Nine Inch Nails - Hurt
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From e-huss at netmeridian.com  Wed Apr 27 18:44:32 2005
From: e-huss at netmeridian.com (Eric Huss)
Date: Wed, 27 Apr 2005 15:44:32 -0700 (PDT)
Subject: Descriptor Transparency
Message-ID: <Pine.BSF.4.58.0504271459460.69833@wintermute.sponsor.net>

I'm trying to write a descriptor (similar to the EiffelDescriptor example
in the Demo directory).  However, I noticed an odd behavior that
descriptors written in pure Python mask the underlying object they are
wrapping, whereas the descriptors written in C do not.

For example, taking the code from
http://users.rcn.com/python/download/Descriptor.htm which implements what
one would think is a straightforward implementation:

class ClassMethod(object):
     "Emulate PyClassMethod_Type() in Objects/funcobject.c"

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

     def __get__(self, obj, klass=None):
          if klass is None:
               klass = type(obj)
          def newfunc(*args):
               return self.f(klass, *args)
          return newfunc

class MyClass(object):

	def c_method_1(k, foo):
		"some docstring"
		print 'c_method_1: %r %r' % (k, foo)
	c_method_1 = ClassMethod(c_method_1)

	def c_method_2(k, foo):
		"some docstring"
		print 'c_method_2: %r %r' % (k, foo)
	c_method_2 = classmethod(c_method_2)

You can see that the Python version does not behave the same as the C
version:

>>> print MyClass.c_method_1.__doc__
None
>>> print MyClass.c_method_2.__doc__
some docstring

I have seen some people manually assign the __doc__ attribute to match the
method they are wrapping (above in the __get__ method it would be
newfunc.__doc__ = self.f.__doc__ before the return).  However, this
extends further into introspection:

>>> import inspect
>>> print inspect.getargspec(MyClass.c_method_1)
([], 'args', None, None)
>>> print inspect.getargspec(MyClass.c_method_2)
(['k', 'foo'], None, None, None)

SO, my question is, is it possible to make a simple descriptor in Python
that has the same behavior as one implemented in C?  Or, at least a way
that does not require a very large amount of emulation code. ;)

-Eric


From finite.automaton at gmail.com  Thu Apr 28 17:33:43 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 28 Apr 2005 14:33:43 -0700
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
	<1114710873.292998.128090@f14g2000cwb.googlegroups.com>
	<1114714105.582253.12150@f14g2000cwb.googlegroups.com>
	<uIydnXD17Z2c2-zfRVn-2A@comcast.com>
Message-ID: <1114724023.743271.275710@g14g2000cwa.googlegroups.com>

> Likewise, the above is basically just an inefficient way of writing:
>
> def date_key(book):
>     return book.data
>
> def author_and_date_key(book):
>     return (author_key(book), date_key(book))

It's certainly more elegant, but I wanted to talk about the mechanics
of comparison functions =)

I don't know that it's more or less efficient in execution.  That
depends on a few factors.



From peter at engcorp.com  Sun Apr 24 12:02:44 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 24 Apr 2005 12:02:44 -0400
Subject: thread lock object.
In-Reply-To: <426ba849$0$166$e4fe514c@news.xs4all.nl>
References: <1114347545.147038.265210@g14g2000cwa.googlegroups.com>
	<426ba849$0$166$e4fe514c@news.xs4all.nl>
Message-ID: <16idnQNPFvyFXvbfRVn-ow@powergate.ca>

Irmen de Jong wrote:
> ajikoe at gmail.com wrote:
>> How can we make only one thread at a time be able to access and
>> increment i ?
> 
> Use a synchronization primitive such as a lock
> (threading.Lock, threading.RLock)
> 
> But for simply incrementing a number (i+=1) this is not needed
> because that operation cannot be interrupted by another thread,
> as far as I know.

Most assuredly it can:

 >>> def f():
...   global x
...   x += 1
...
 >>> dis.dis(f)
   3           0 LOAD_GLOBAL              0 (x)
               3 LOAD_CONST               1 (1)
               6 INPLACE_ADD
...a context-change here can lead to incorrect results...
               7 STORE_GLOBAL             0 (x)
              10 LOAD_CONST               0 (None)
              13 RETURN_VALUE

-Peter


From james at wrong.nu  Mon Apr 25 20:27:41 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Tue, 26 Apr 2005 01:27:41 +0100
Subject: Do I need a nested lambda to do this?
In-Reply-To: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>
References: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>
Message-ID: <200504260127.42614.james@wrong.nu>

On Tuesday 26 April 2005 00:34, raoul wrote:
> I can't figure this one out. Trying to be unnecessarily functional I
> suspect.

With list comprehensions:

Python 2.3.4 (#1, Mar 26 2005, 20:54:10)
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> vals = [1.000,2.344,4.2342]
>>> tabs = [((0,1),(0,3),(0,4)),
...        ((2,2),(3,0),(3,9)),
...        ((3,4),(6,3),(7,1))]
>>> [(tuple([(vals[index],subtab[1]) for subtab in tab])) for index,tab in 
enumerate(tabs)]
[((1.0, 1), (1.0, 3), (1.0, 4)), ((2.3439999999999999, 2), 
(2.3439999999999999, 0), (2.3439999999999999, 9)), ((4.2342000000000004, 4), 
(4.2342000000000004, 3), (4.2342000000000004, 1))]


From http  Thu Apr 21 04:04:21 2005
From: http (Paul Rubin)
Date: 21 Apr 2005 01:04:21 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
	<mailman.2204.1114033804.1799.python-list@python.org>
	<slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <7x3btkd08q.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> I sometimes think python should have been more explicite here,
> using a marker for the start-index and end-index, may '^' and
> '$'. So if you wanted the last element you had to write:
> 
>   lst[$]
> 
> And for the next to last element:
> 
>   lst[$ - 1]

I like this.  I don't know how many times I've gotten screwed by
wanting the n'th element from the last for variable n, and saying
"lst[n]" then realizing I have a bug when n=0.  lst[$-n] works perfectly.


From peufeu at free.fr  Mon Apr 11 14:29:54 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Mon, 11 Apr 2005 20:29:54 +0200
Subject: web authoring tools
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>
	<Xns96356AFD03D32vaneveryindiegamedes@207.69.189.191>
	<mailman.1671.1113204815.1799.python-list@python.org>
Message-ID: <op.so2yz4blqfv3if@localhost>


>>> Ideally, I would like an open source website + html design tool
>>> implemented in Python
>>
>> didn't you just say that ideally, you wanted a tool written in lisp or
>> scheme?
>
> I honestly got a little tired of the tone of the answers I was getting
> from that crowd, about what an idiot I am.  My query there is still

	You mean you are interested in a web application programming framework in  
the spirit of Seaside, or in a HTML/CSS editor in the spirit of  
Dreamweaver ?


From belred at gmail.com  Wed Apr 13 21:27:26 2005
From: belred at gmail.com (Bryan)
Date: Wed, 13 Apr 2005 18:27:26 -0700
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113422698.396417.45280@l41g2000cwc.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<1113422698.396417.45280@l41g2000cwc.googlegroups.com>
Message-ID: <425DC6FE.5000305@gmail.com>

pythonUser_07 wrote:
> Python is great, but having much "admin" type experience, I've found
> python to be less than Ideal when dealing with system calls and
> standard Input Ouput.
> 
> For example, I've written complex tools that use perforce, I've taken
> advantage of both regular IO and the perforce marshalled IO.  Under
> heavy load, some of the threads in my scripts experience IO hang (Linux
> and WIndows) (solaris and BSD were fine).  I did not get the same
> behavior with Perl.
> 
> Having said that I still do 99% of my utilities in python.  Just be
> aware.
> 

i've written some complex tools around perforce too, but i use the perforce 
python module and get an order of magnitude better performance than when i use 
popen to execute the same command (if that is what you are referring to  by 
"regular IO and marshalled IO".  my app doesn't use threads, so i can't speak to 
that, but i've never experienced an IO hang related to perforce.

bryan



From harlinseritt at yahoo.com  Sun Apr 10 07:29:08 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 10 Apr 2005 04:29:08 -0700
Subject: serialize a tkinter thing
In-Reply-To: <wdY5e.1205486$35.44369741@news4.tin.it>
References: <wdY5e.1205486$35.44369741@news4.tin.it>
Message-ID: <1113132548.034670.308910@z14g2000cwz.googlegroups.com>

No reason why they shouldn't be.

-Harlin



From eric_brunel at despammed.com  Tue Apr 19 03:56:11 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 19 Apr 2005 09:56:11 +0200
Subject: Tkinter Event Types
References: <1113857330.024552.245040@f14g2000cwb.googlegroups.com>
Message-ID: <opspgyzxusrqur0o@eb.pragmadev>

On 18 Apr 2005 13:48:50 -0700, codecraig <codecraig at gmail.com> wrote:

> Hi,
>   When I do something like.
>
> s = Scale(master)
> s.bind("<ENTER>", callback)
>
> def callback(self, event):
>     print event.type
>
> I see "7" printed out.  Where are these constants defined for various
> event types?  Basically i want to do something like...
>
> def callback(self, event):
>     if event.type == ENTER:
>         print "You entered"

The usual way is to bind different callbacks on different events. So you won't have to test the event type in your callback, since the callback itself will already have been selected from the event type. If you insist in doing it the way you mention, you can always do:


ENTER_EVENT = 1
KEYPRESS_EVENT = 2
# ...

def myCallback(evtType, evt):
   if evtType == ENTER_EVENT:
     # some action...
   elif evtType == KEYPRESS_EVENT:
     # some other action...
   # ...

myWidget.bind('<Enter>', lambda evt: myCallback(ENTER_EVENT, evt))
myWidget.bind('<KeyPress>', lambda evt: myCallback(KEYPRESS_EVENT, evt))


I can't really see what it will be good for however...

HTH
-- 
python -c 'print "".join([chr(154 - ord(c)) for c in "U(17zX(%,5.z^5(17l8(%,5.Z*(93-965$l7+-"])'


From gabriel.cooper at mediapulse.com  Fri Apr  1 16:02:53 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Fri, 01 Apr 2005 16:02:53 -0500
Subject: Pseudocode in the wikipedia
In-Reply-To: <n9br41pcarifbu9umt6aligt9g5bdnscb5@4ax.com>
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>	<d2k70u$70h$1@sea.gmane.org>	<mailman.1205.1112386538.1799.python-list@python.org>
	<n9br41pcarifbu9umt6aligt9g5bdnscb5@4ax.com>
Message-ID: <424DB6FD.3030206@mediapulse.com>



Ron_Adam wrote:

>To me ":=" could mean to create a copy of an object...  or should it
>be "=:" ?
>
>Or how about ":=)" to mean is equal and ":=(" to mean it's not.
>
>Then there is ";=)", to indicate 'True', and ':=O' to indicate 'False'
>  
>
Not to mention "(_ | _)" for asserts!




From prasad413in at gmail.com  Fri Apr 22 06:16:02 2005
From: prasad413in at gmail.com (hue)
Date: 22 Apr 2005 03:16:02 -0700
Subject: Run Unix shell command $ parse command line arguments in python
In-Reply-To: <mailman.2277.1114159863.1799.python-list@python.org>
References: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>
	<mailman.2277.1114159863.1799.python-list@python.org>
Message-ID: <1114164962.105996.299460@z14g2000cwz.googlegroups.com>

Thanks for your reply

I started writing the script.. I have gone through documentation for
getopt

import string, getopt, sys

def usage():

    print '''myscript.py -- uses getopt to recognize options
Options: -n  -- No
         -t  -- T
         -h  -- help
         -i  -- i
         -o  -- Output:filename'''
    sys.exit(1)
def main():

    print "SYS ARGV: ", ",".join(sys.argv)

# Define the Options

Options = {
        'n:': 'Number=',
        't:': 'T',
        'h' : 'help',
        'i' : 'i',
        'o' : 'Output_file',
    }
shortOpts = ''.join(Options.keys())
longOpts  = Options.values()


try:
        (opts, args) = getopt.getopt(argv[1:], shortOpts, longOpts)
except getopt.error, msg:
        print "Unrecognized argument or option"
    # end try


for (opt, arg) in opts:

        if opt in ('-n', '--Number'):
            print '-n is the Number', Number
            sys.exit()

        elif opt in ('-t', '--T'):
            print '-t is the T', T
            sys.exit()

        elif opt in ('-h', '--help'):
            usage()
            print " "
            sys.exit()

        elif opt in ('-i', '--i'):
            print " I", i


        elif opt  in ('-o', '--Output Filename'):
            print "Output", Output


        # end if
       # end for

            print "OPTS: ", ",".join([repr(o) for o in opts])
        print "ARGS: ", ",".join(args)

if __name__ == "__main__":
    main()

with the above code, I am planning to do command line parsing. But how
to run unix shell command? DO i have to use os Module/  import command?

How should i proceed further, to
 import commands
 commands.getstatusoutput('ls /bin/ls')

Please suggest me some ideas how to proceed further

Thanks



From jerf at jerf.org  Thu Apr 28 16:35:03 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 28 Apr 2005 16:35:03 -0400
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.04.28.20.35.02.860074@jerf.org>

On Thu, 28 Apr 2005 10:34:44 -0700, demon_slayer2839 wrote:

> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.

The biggest problem with understanding Object Orientation is that it is
only a net gain, even when using something as nice as Python, when you
pass the trivial. 

If you're looking at provided examples of OO that fits on a screen or two
and going "And so what...?", I'd actually consider that a sign of
comprehension, not a bad thing. (No sarcasm.)

It only goes past "And so what...?" when you get into larger programs.

One example that exists in the Python library and has a lot of code
available on line is the urllib2 library. (Unfortunately, that is
something of a complicated bit of code and you're almost better off just
listening to what I'm going to say here than actually looking at the
code :-) )It uses an OO pattern called the "template" pattern, where you
bundle as much code as possible that can be used generally into a
"superclass", and inherit and specialize when you need to do something
specific.

When you want to send an HTTP request, and do something useful with the
results, you create your own request subclass. As a result of using it,
the superclass does all of it's stuff, in this case making the connection
and basic parsing of the results, so you don't have to. The superclass
then calls into the sub-class's overridden methods, based on what happened
with the request. For instance, if you are writing an RSS retriever and
the retrieval results in a 302 code, "Moved Permanently", the superclass
will call self.error_302(), and the RSS reader can then update its
personal database of RSS file locations.

OO consists structurally of the code+data combination; OO consists
*practically* of each of these little techniques, like I gave in the
previous paragraph, adding together and making things easy. None of them
are *impossible* with non-OO code, merely harder to write, but the
cumulative easing effect is quite significant.

You're probably closer to understanding the theory than you think; now you
just need to use it for a while, with an active, open mind probing for
ways to make your programming life easier. Only that will bring deeper
understanding, or maybe reading other's code if you're dedicated. You
might also look online for some of the "Design Patterns", which aren't
worth worshiping but provide a concise description of some of the other
things that OO makes easier than the alternatives.

(You may also be interested in this essay I wrote:

http://www.jerf.org/writings/bowersLaw.html

One of the problems OO faced in general, especially the late 80s and most
of the 90s, was prematurely jumping to dogma before there was adequate
community experience to formulate a *good* dogma; even today there are a
lot of "OO experts" who would take extensive exception to both this post
and that essay, even though I'm pretty sure that facts and experience are
on my side :-) . The old dogma lives on, even as many communities like
Python, Ruby, and the Testing Methodology folk are formulating better
ones. The reality of OO is that it is a rich and highly varied *family* of
techniques, which may also not be helping if you try to learn from
multiple sources; that essay tries to explore the common thread behind all
of those techniques, and explain why it is the common thread.)


From theller at python.net  Fri Apr  8 07:21:52 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 08 Apr 2005 13:21:52 +0200
Subject: decorating functions with generic signatures (not for the faint
 of heart)
References: <1112955437.518384.56960@g14g2000cwa.googlegroups.com>
Message-ID: <ll7t5x9r.fsf@python.net>

"Michele Simionato" <michele.simionato at gmail.com> writes:

> I have realized today that defining decorators for functions
> with generic signatures is pretty non-trivial.

I've not completely read your post ;-), but I assume you're trying to do
something that I've also done some time ago. Maybe the following code
snippet is useful for you - it creates a source code string which can
than be compiled.

The code prints this when run:

"""
def f(a, b=42, c='spam', d=None):
    'docstring'
    return f._api_(a, b, c, d)
def g(*args, **kw):
    ''
    return g._api_(*args, **kw)
"""

Thomas

<code>
def make_codestring(func):
    import inspect
    args, varargs, varkw, defaults = inspect.getargspec(func)
    return "def %s%s:\n    %r\n    return %s._api_%s" % \
           (func.func_name,
            inspect.formatargspec(args, varargs, varkw, defaults),
            func.func_doc or "",
            func.func_name,
            inspect.formatargspec(args, varargs, varkw))

def f(a, b=42, c="spam", d=None):
    "docstring"

def g(*args, **kw):
    pass

print make_codestring(f)
print make_codestring(g)
</code>


From gamma-ray at dope.comcast.net  Fri Apr 29 17:22:45 2005
From: gamma-ray at dope.comcast.net (Anthony D'Agostino)
Date: Fri, 29 Apr 2005 17:22:45 -0400
Subject: Sorting an Edge List
Message-ID: <fLqdne0t4Y81OO_fRVn-qw@comcast.com>

I need to sort this list:
[('A','Y'), ('J','A'), ('Y','J')] like this:
[('A','Y'), ('Y','J'), ('J','A')].

Note how the Ys and Js are together. All I need is for the second element of 
one tuple to equal the first element of the next tuple. Another valid 
solution is [('J','A'), ('A','Y'), ('Y','J')].

I was successful in doing this a while back with a modified bubble sort 
algorithm, but now I can't find my own code. Can the list be sorted with a 
comparison function or some other way?





From philippe at philippecmartin.com  Wed Apr 20 12:29:32 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Wed, 20 Apr 2005 16:29:32 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
	<dqCdneECDr445vvfRVn-tA@powergate.ca>
Message-ID: <Mrv9e.882$l45.490@newssvr12.news.prodigy.com>

I do not want to pollute the debate but:

-) I remember a software QA managanager responsible for "C" coding rules
also not allowing us to use 'break', 'continue', or 'return' (in the middle
of a function). 

Although I find them 'cleaner' than goto, would not use goto, and certainly
do use 'return' in the middle of functions, I also agree that some people
might think the former do reduce code readibility - ex: I , somehow, do not
feel good using 'continue' and 'break'.

-) Having worked on a few lex/yacc projects, I remmember being troubled ,as
I ported the resulting c code into an embedded environement, that the
latter extensively used gotos - Was that done only because people are not
supposed to look at the generated code - or is it also simpler to generate
non-structured C code ?

Regards,

Philippe



Peter Hansen wrote:

> Maxim Kasimov wrote:
>>  uuuuf..., i don't requesting that "goto" was available in next versions
>> of python, but i'm saying if it will be so, it will be easy and quickly
>  > _debug_ some skripts, _not only_ for commenting
> 
> Then we go right back to Simon Brunning's question for
> you: "How does goto help you to remove bugs?"
> 
> Maxim, nobody is really saying that *you* cannot have
> found goto useful in debugging (though we're curious
> for a real example, rather than just rhetoric).  What
> most people are saying (roughly) is that after writing
> tens (or hundreds) of thousands of lines of code, we
> cannot think of examples where the value of "goto",
> for debugging or otherwise, outweighs the incredible
> damage it does to the structure and (thus) readability
> of code.  And keep in mind that many of us were raised
> on languages like BASIC and yet we've learned, improved,
> and moved on to the point where we fully understand the
> perceived value of GOTO in the mind of a newbie, but
> remain unconvinced that even (or especially!) for a newbie
> it is a good idea to have it available.
> 
> So far, nobody on the "use goto!" side of the fence has
> presented arguments that haven't already been shot down
> dozens of times in this newsgroup and elsewhere.  Of
> course, we should all take this hint as a reminder that
> this is a "religious" issue and that this particular
> thread is not going to settle it once and for all.
> 
> -Peter



From philippe at philippecmartin.com  Mon Apr 25 16:32:05 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 25 Apr 2005 20:32:05 GMT
Subject: ANN: PyDev 0.9.3 released
References: <42261366.3020602@esss.com.br><424C2A8E.9030104@esss.com.br>
	<mailman.2479.1114451614.1799.python-list@python.org>
	<OSbbe.306$461.263@newssvr11.news.prodigy.com>
	<1114459936.454063.242790@z14g2000cwz.googlegroups.com>
Message-ID: <9tcbe.310$461.270@newssvr11.news.prodigy.com>

I forced the installation and it worked

I'm using 2.4.1

Regards,

Philippe




James wrote:

> It does for me. I just installed through it.
> 
> http://pydev.sourceforge.net/updates/
> 
> I am having some other problems though. When I run it, I get ...
> 
> sys:1: DeprecationWarning: Non-ASCII character '\x90' in file
> C:\Python24\python.exe on line 1, but no encoding declared; see
> http://www.python.org/peps/pep-0263.html for details
>   File "C:\Python24\python.exe", line 1
>     MZ?$,000$0 0
n.pdbA?330??3?::0?3??3?
>       ^
> 
> It is reading python.exe as a text source file. I must have configured
> something off.



From kent37 at tds.net  Tue Apr 19 14:33:26 2005
From: kent37 at tds.net (Kent Johnson)
Date: Tue, 19 Apr 2005 14:33:26 -0400
Subject: Encoding Questions
In-Reply-To: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>
References: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>
Message-ID: <42654ab8$1_3@newspeer2.tds.net>

jalil at feghhi.com wrote:
> 1. I download a page in python using urllib and now want to convert and
> keep it as utf-8? I already know the original encoding of the page.
> What calls should I make to convert the encoding of the page to utf8?
> For example, let's say the page is encoded in gb2312 (simple chinese)
> and I want to keep it in utf-8?

Something like
data = urllib.url_open(...).read()
unicodeData = data.decode('gb2312')
utf8Data = unicodeData.encode('utf-8')

You may want to supply the errors parameter to decode() or encode(); see the docs for details.
http://docs.python.org/lib/string-methods.html

> 2. Is this a good approach? Can I keep any pages in any languages in
> this way and return them when requested using utf-8 encoding?

Yes, as long as you know reliably what the encoding is for the source pages.

> 3. Does python 2.4 support all encodings?

I doubt it :-) but it supports many encodings. The list is at
http://docs.python.org/lib/standard-encodings.html

Kent


From dh47302 at yahoo.com  Tue Apr 26 03:47:00 2005
From: dh47302 at yahoo.com (Klaus Alexander Seistrup)
Date: Tue, 26 Apr 2005 07:47:00 +0000 (UTC)
Subject: Simple, elegant, pythonic solution for switch statement
References: <1114499709.437575.266630@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd6rsfk.gib.klaus@main.szn.dk>

python_only wrote:

> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410692

Neat solution!

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From see at sig.for.address.edu  Wed Apr 13 23:14:51 2005
From: see at sig.for.address.edu (Doug Schwarz)
Date: Thu, 14 Apr 2005 03:14:51 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
Message-ID: <see-414FAA.23143013042005@news.frontiernet.net>

In article <mailman.1865.1113441561.1799.python-list at python.org>,
 Dick Moores <rdm at rcblue.com> wrote:

> Dan wrote at 18:02 4/13/2005:
> >On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
> >wrote:
> >
> > > I'm just trying to help an artist acquaintance who needs (I just
> > >learned) the first 3003 digits of pi to the base 12.
> >
> >Now you've got me curious.  Why would an artist want the first 3003
> >digits of pi to the base 12?
> 
> He says,
> Do you know how I can get "base12 pi"?
> Because the chromatic scale is base12.
> c c# d d# e f f# g g# a a# b
> 
> Dick

Does your artist friend have any idea what base 12 means?

The chromatic scale is based on one twelfth powers of two, i.e., if the 
frequency of a note in the scale is f(n), then the frequency of the next 
note is given by

  f(n+1) = f(n) * 2^(1/12)

so by the time you go all 12 notes in an octave you have doubled the 
frequency.  There is nothing here involving base 12 or pi.

-- 
Doug Schwarz
dmschwarz&urgrad,rochester,edu
Make obvious changes to get real email address.


From greg at cosc.canterbury.ac.nz  Wed Apr 13 23:40:00 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 14 Apr 2005 15:40:00 +1200
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <d3ekhf$a0f$1@lairds.us>
References: <d3ekhf$a0f$1@lairds.us>
Message-ID: <3c670tF6jdeqrU1@individual.net>

Simon Brunning wrote:
> 
> "You need to recursively subdivide the cake until you have a piece small
> enough to fit in your input buffer. Then the atomicity of the cake-ingestion
> operation will become apparent." - Scott David Daniels

Actually it was me who wrote that, not Scott.

(Darn. I finally say something that gets into Quote of the
Week, and it's attributed to someone else! :-) :-) :-)

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From rbt at athop1.ath.vt.edu  Fri Apr  8 11:41:39 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 08 Apr 2005 11:41:39 -0400
Subject: Interpreter problem
In-Reply-To: <mailman.1540.1112974136.1799.python-list@python.org>
References: <425684F8.5060507@novasyshealth.com>	<mailman.1538.1112970334.1799.python-list@python.org>	<d365ha$h33$1@solaris.cc.vt.edu>
	<mailman.1540.1112974136.1799.python-list@python.org>
Message-ID: <d368nj$n56$1@solaris.cc.vt.edu>

Steve Holden wrote:
> rbt wrote:
> 
>> Steve Holden wrote:
>>
>>> Greg Lindstrom wrote:
>>>
>>>> I am using python 2.3.5 on a Linux system and have an odd problem 
>>>> dealing with the 'sha-bang' line.  I have a file, driver.py which 
>>>> starts with
>>>>
>>>> #!/usr/bin/python
>>>>
>>>> and works fine (that is, when I type in ./driver.py at the command 
>>>> prompt the file runs as expected).  I have another file, 
>>>> myotherfile.py which starts with the exact same line 
>>>> (#!/usr/bin/python) but I get
>>>>
>>>> : bad interpreter: No such file or directory
>>>>
>>> There's almost certainly a carriage return as well as a newline in 
>>> the shebang line.
>>>
>>> [...]
>>>
>>> regards
>>>  Steve
>>
>>
>>
>> Not so. I get the same result with python 2.3 and 2.4 on Debian Linux 
>> Testing. Nothing odd at all in the shebang.
> 
> 
> What, you are telling me you've checked the file with a command like
> 
>   head driver.py | od -bc
> 
> and verified the absence of any extraneous characters?
> 
> regards
>  Steve

You're right:

rbt at athop1:~$ cd /usr/local/bin
rbt at athop1:/usr/local/bin$ head web* | od -bc
0000000 043 041 057 165 163 162 057 142 151 156 057 160 171 164 150 157
           #   !   /   u   s   r   /   b   i   n   /   p   y   t   h   o
0000020 156 015 012 144 145 146 040 167 145 142 137 142 141 143 153 165
           n  \r  \n

How can this be fixed? vim doesn't see it.


From mmanso at amplitudenet.pt  Sun Apr 24 13:56:07 2005
From: mmanso at amplitudenet.pt (Miguel Manso)
Date: Sun, 24 Apr 2005 18:56:07 +0100
Subject: Getting into Python, comming from Perl.
Message-ID: <426BDDB7.8010403@amplitudenet.pt>

Hi, list.

I'm into a psicological doubt that I would like to share with you 
(you'll know why later on this mail).

I'm a programmer with 5 year of experience into Perl. I'm on that point 
where you resolve problems without thinking on HOW you'll do it with 
that language but only on the problem itself.

Since Perl 6 started I've been following it. The conclusion I have is 
they're making a whole new language and I'll have to learn it. This 
being said and, since I've to learn a new language, I've started 
thinking in a new language. I've noticed Python is getting more and more 
developers and many projects are being made.

I've tryed to use python some times but I get frustrated very quick. I 
get myself many times needing to figure out how to loop through a list, 
declare an associative array, checking how to pass named parameters to 
functions, and simple things like that.

What I would like to know is if anyone had these problems and if you can 
share that experience with me. I'm trying to minimize my "frustration" :)

Thanks a lot.

-- 
Miguel Manso <mmanso at amplitudenet.pt>
============================================
Amplitude Net
Net - Rua dos Salazares, 842
4100-442 Porto

Phone: +351 22 532 2000
Fax: +351 22 618 2157
Web: www.amplitudenet.pt
============================================



From timr at probo.com  Fri Apr  1 03:05:11 2005
From: timr at probo.com (Tim Roberts)
Date: Fri, 01 Apr 2005 00:05:11 -0800
Subject: hex string into binary format?
References: <mailman.1136.1112277359.1799.python-list@python.org>
Message-ID: <740q4155k49755r54dejv85jptqq1o0uck@4ax.com>

"Tertius Cronje" <Tertius.Cronje at postoffice.co.za> wrote:
>
>How do I get a hexvalued string to a format recognized for binary
>calculation?

You're going to be embarrassed.

>import binascii
>s1 = '1C46BE3D9F6AA820'
>s2 = '8667B5236D89CD46'
>
>i1 = binascii.unhexlify(s1)
>i2 = binascii.unhexlify(s2)
>x = i1 ^i2
>
>	TypeError: unsupported operand type(s) for ^: 'str' and 'str'

No imports at all:

s1 = '1C46BE3D9F6AA820'
s2 = '8667B5236D89CD46'
i1 = int(s1,16)
i2 = int(s2,16)
x = i1 ^ i2
print hex(x)
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From tjreedy at udel.edu  Tue Apr 26 12:51:58 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 26 Apr 2005 12:51:58 -0400
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com><d4kh4q$tqf$1@domitilla.aioe.org>
	<86wtqqm27r.fsf@guru.mired.org><d4ktck$r9a$1@domitilla.aioe.org>
	<86is29n9cg.fsf@guru.mired.org> <d4l825$mj7$1@domitilla.aioe.org>
Message-ID: <d4lr9h$oid$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:d4l825$mj7$1 at domitilla.aioe.org...
> I think backward compatibility is good enough. A Java JAR file compiled 
> under for JVM 1.2 can still run in JVM 1.4. I don't think anyone will or 
> can expect forward compatibility, that will require godly powers...

One difference between Java and Python is this: Java bytecodes are, as I 
understand it, part of the Java language definition.  CPython bytecodes are 
intentionally not part of the language at all.  Except maybe fore PyPy, 
other implementations do not use them.  Jython translates Python source to 
Java bytecodes.  Pyrex translates augmented Python source to C, to be 
compiled to native machine code.  Ironman translates, I presume, to .NET 
common language.  PyParrot (don't know if it has an official name) 
translates to Parrot bytecodes.  Viper translated to OCamel.

If you want an implementation with frozen bytecodes, you are free to make 
one ;-)

Terry J. Reedy







From andrea_gavana at tin.it  Fri Apr  1 18:00:34 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Sat, 2 Apr 2005 01:00:34 +0200
Subject: How To Do It Faster?!?
Message-ID: <42000634000201E8@ims9c.cp.tin.it>

Hello Jeremy & NG,

>* Poke around in the Windows API for a function that does what you want,
>and hope it can do it faster due to being in the kernel.

I could try it, but I think I have to explain a little bit more my problem.

>If you post more information about how you are using this data, I can try
to help you. 

Basically, I have to scan a really BIG directory: essentially, is a UNIX
file system where all our projects resides, with thousand and thousand of
files and more than 1 TB of information. However, we are about 200-300 users
of this space. This is what I do now and I would like to improve:

1) For a particular user (1 and only 1 at a time), I would like to scan
all directories and subdirectories in order to find which FILES are owned
by this user (I am NOT interested in directory owner, only files). Noting
that I am searching only for 1 user, its disc quota is around 20-30 GB,
or something like this;
2) My application is a GUI designed with wxPython. It run on Windows, at
the moment (this is why I am asking for Windows user IDs and similar, on
Unix is much simpler);
3) While scanning the directories (using os.walk), I process the results
of my command "dir /q /-c /a-d MyDirectory" and I display this results on
a wxListCtrl (a list viewer) of wxPython in my GUI; 
4) I would not use the suggested command "dir /S" on a DOS shell because,
even if it scans recursively all directories, I am NOT able to process intermediate
results because this command never returns until it has finished to scan
ALL directories (and for 1 TB of files, it can take a LOT of time);
5) For all the files in each directory scanned, I do:
- IF a file belongs to that particular user THEN:
      Get the file name;
      Get the file size;
      Get the last modification date;
      Display the result on my wxListCtrl
- ELSE:
      Disregard the information;
- END

I get the file owner using the /Q switch of the DIR command, and I exclude
a priori the subdirectories using the /a-d switch. That because I am using
os.walk().
6) All of our users can see this big unix directory on their PC, labeled
as E:\ or F:\ or whatever. I can not anyway use UNIX command on dos (and
I can not use rsh to communicate with the unix machine and then use something
like "find . -name etc".

I hope to have been clearer this time...

I really welcome all your suggestions.

Andrea.



From flupke at nonexistingdomain.com  Sat Apr  9 19:06:04 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Sat, 09 Apr 2005 23:06:04 GMT
Subject: workaround for generating gui tools
In-Reply-To: <pan.2005.04.09.21.20.39.130792@jerf.org>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<d3955k$kne$00$1@news.t-online.com>
	<pan.2005.04.09.21.20.39.130792@jerf.org>
Message-ID: <wdZ5e.60569$wV2.4520061@phobos.telenet-ops.be>

Jeremy Bowers wrote:

<snip>

> 
> Domain-specific abstractions do that *faster* than GUI designers, not
> slower. And better, too, since every iteration tends to be fully
> functional and not just a "let's see what this looks like" prototype.
> 
> Heck, switch 'em out dynamically based on what day of the week it is and
> how the user feels today. Let's see your GUI-designer do that.
> 
> And if you're not used to doing it that way, you'll be *stunned* at how
> much stuff tends to factor out and get easily re-used.
> 
> An approach that has more data to work with (some idea of what things are
> doing and what they are for) will beat an approach with less data ("thing
> at row 4, col 2" or, worst case, "thing at 233,144") any day.
> 
> GUI designers are like the regexs in the famous jwz quote: "Some people,
> when confronted with a problem, think 'I know, I'll use a GUI designer'.
> Now they have two problems." Both have a niche in the "quick fix"
> department, both are typically over-used, but overall regexs are the more
> useful of the two; at least there are cases where they are the undisputed
> right answer (like defining tokens in a language parser).
> 
> Generally, over the first couple of weeks of a project, the
> domain-specific language writer may seem to be behind the GUI designer
> cranking out screen after screen of templated GUI widgets, but after a
> couple of weeks the domain-specific language user will pull into the lead
> and never give it up, and will be a lot happier to boot.

First time i hear about domain-specific abstractions.
Do you mean that instead of using a GUI designer, you make some sort of 
engine that constructs a gui for you?

One thing i find repetitive to do is designing gui's that are just 
simple views on a database tables where one can create,edit and delete 
records. If one could construct a gui dynamically for these types of 
things, that would be great.

Benedict


From adarsh at stat.tamu.edu  Mon Apr  4 13:28:39 2005
From: adarsh at stat.tamu.edu (student)
Date: 4 Apr 2005 10:28:39 -0700
Subject: Symbol Referencing Error in Fortran 90
Message-ID: <1112635719.898929.108060@o13g2000cwo.googlegroups.com>

while compiling on:

SunOS 5.8 Generic_108528-27 sun4u sparc SUNW,Sun-Fire-280R

I get the following error:

Undefined                       first referenced
 symbol                             in file
matrixi_                            tst.o
ld: fatal: Symbol referencing errors. No output written to a.out

However, the compilation is successful when linking is suppressed. Can
anyone help me get rid of this error..

Compiling with the verbose option gives the following message:

###     command line files and options (expanded):
### -v tst.f90
### f90: Note: LM_LICENSE_FILE = (null)
### f90: Note: NLSPATH =
/local/SUNWspro/bin/../WS6U2/bin/../lib/locale/%L/LC_MESSAGES/%N.cat:/local/SUNWspro/bin/../WS6U2/bin/../../lib/locale/%L/LC_MESSAGES/%N.cat
/local/SUNWspro/bin/../WS6U2/bin/f90comp -y-o -ytst.o -ev
-y-ftrap=common -m3 -dq -y-fbe -y/local/SUNWspro/bin/../WS6U2/bin/fbe
-y-xarch=generic -y-s -H "/local/SUNWspro/bin/../WS6U2/bin/f90 -v "
-y-xcache=generic -xcache=generic
-I/local/SUNWspro/WS6U2/include/f90/v8 -p/local/SUNWspro/WS6U2/lib
-y-verbose -xall tst.f90
### f90: Note: LD_LIBRARY_PATH = (null)
### f90: Note: LD_RUN_PATH     = (null)
### f90: Note: LD_OPTIONS = (null)
/usr/ccs/bin/ld -t -R/local/SUNWspro/lib:/opt/SUNWspro/lib -o a.out
/local/SUNWspro/WS6U2/lib/crti.o /local/SUNWspro/WS6U2/lib/crt1.o
/local/SUNWspro/WS6U2/lib/values-xi.o -Y
P,/local/SUNWspro/lib:/local/SUNWspro/WS6U2/lib:/usr/ccs/lib:/usr/lib
tst.o -lfui -lfai -lfai2 -lfsumai -lfprodai -lfminlai -lfmaxlai
-lfminvai -lfmaxvai -lfsu -lsunmath -lm -lc
/local/SUNWspro/WS6U2/lib/crtn.o
Undefined                       first referenced
 symbol                             in file
matrixi_                            tst.o
ld: fatal: Symbol referencing errors. No output written to a.out
rm tst.o



From tjreedy at udel.edu  Mon Apr 25 12:06:54 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 25 Apr 2005 12:06:54 -0400
Subject: Exception in Python 2.3.3 Interpreter
References: <1114434259.853654.272420@z14g2000cwz.googlegroups.com>
Message-ID: <d4j498$t15$1@sea.gmane.org>


"Saravanan" <saravanand at vsnl.net> wrote in message 
news:1114434259.853654.272420 at z14g2000cwz.googlegroups.com...
> Any clue about the problem?

None except to suggest that you upgrade to 2.3.5 and see if it has been 
fixed.

tjr





From codecraig at gmail.com  Tue Apr 19 11:17:04 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 08:17:04 -0700
Subject: Tkinter and Scrollbar
Message-ID: <1113923824.233138.173670@l41g2000cwc.googlegroups.com>

Hi,
  I am trying to use a Scrollbar for a Listbox.  I want a scrollbar
which which has the vertical and horizontal scroll bars.  Here is how i
am doing it now, is the only way or "best" way to do it?


        # vertical scroll bar for list
        self._scrollbarY = Scrollbar(self.myContainer)
        self._scrollbarY.pack(side=RIGHT, fill=Y)

        # horizontal scroll bar for list
        self._scrollbarX = Scrollbar(self.myContainer,
orient=HORIZONTAL)
        self._scrollbarX.pack(side=BOTTOM, fill=X)

        self._list = Listbox(self.myContainer)
        self._list.pack()

        for i in range(100):
            self._list.insert(END, "a"*i)

        self._list.config(yscrollcommand=self._scrollbarY.set)
        self._list.config(xscrollcommand=self._scrollbarX.set)
        self._scrollbarY.config(command = self._list.yview)
        self._scrollbarX.config(command = self._list.xview)


Thanks.



From just at xs4all.nl  Mon Apr 11 05:30:25 2005
From: just at xs4all.nl (Just)
Date: Mon, 11 Apr 2005 11:30:25 +0200
Subject: unicode character '\N{ }'
References: <d3df9u$nml$1@news.kreonet.re.kr>
Message-ID: <just-FD8295.11302511042005@news1.news.xs4all.nl>

In article <d3df9u$nml$1 at news.kreonet.re.kr>,
 Daewon YOON <dwyoon at purunSPAMinfo.co.kr> wrote:

> I learned from http://www.jorendorff.com/articles/unicode/python.html that
> one can specify a unicode character by u'\N {name of the character}'.
> 
> Is there any method that I do the reverse of this process? For example,
> when
> I have a unicode character '?', uc.method() should return the character name
> 'POUND SIGN' in str format.

  import unicodedata
  name = unicodedata.name(c)

Just


From martin at v.loewis.de  Tue Apr 19 14:47:05 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 19 Apr 2005 20:47:05 +0200
Subject: Encoding Questions
In-Reply-To: <42654ab8$1_3@newspeer2.tds.net>
References: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>
	<42654ab8$1_3@newspeer2.tds.net>
Message-ID: <42655229$0$29157$9b622d9e@news.freenet.de>

Kent Johnson wrote:
> Something like
> data = urllib.url_open(...).read()
> unicodeData = data.decode('gb2312')
> utf8Data = unicodeData.encode('utf-8')
> 
> You may want to supply the errors parameter to decode() or encode(); see
> the docs for details.
> http://docs.python.org/lib/string-methods.html

In addition, for an HTML page, you might need to update the META element
for the content-type HTTP header. For an XHTML page, you might need to
update/remove the XML declaration.

Regards,
Martin


From robin at SPAMREMOVEjessikat.fsnet.co.uk  Thu Apr 28 16:35:43 2005
From: robin at SPAMREMOVEjessikat.fsnet.co.uk (Robin Becker)
Date: Thu, 28 Apr 2005 20:35:43 +0000
Subject: regex over files
In-Reply-To: <pan.2005.04.26.21.39.15.988504@jerf.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
	<426EAA9D.2050904@jessikat.fsnet.co.uk>
	<pan.2005.04.26.21.39.15.988504@jerf.org>
Message-ID: <4271491F.9040500@jessikat.fsnet.co.uk>

Jeremy Bowers wrote:
....
 >
 > As you try to understand mmap, make sure your mental model can take into
 > account the fact that it is easy and quite common to mmap a file several
 > times larger than your physical memory, and it does not even *try* to read
 > the whole thing in at any given time. You may benefit from
 > reviewing/studying the difference between virtual memory and physical
 > memory.
I've been using vm systems for 30 years and I suspect my mental model is a bit
decrepit. However, as convincingly demonstrated by testing my mental model seems
able to predict low memory problems. When systems run out of memory they tend to
perform poorly. I'm not sure the horrible degradation I see with large files is
necessary, but I know it occurs on at least two common vm implementations.
-- 
Robin Becker


From neuhauser+python-list#python.org at sigpipe.cz  Sun Apr 17 08:47:52 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Sun, 17 Apr 2005 14:47:52 +0200
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <sjeo51hst8a26uqd0ejlv30l5tjnkh43j6@4ax.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1746.1113303998.1799.python-list@python.org>
	<sjeo51hst8a26uqd0ejlv30l5tjnkh43j6@4ax.com>
Message-ID: <20050417124752.GA1482@isis.sigpipe.cz>

# sjmachin at lexicon.net / 2005-04-13 08:07:06 +1000:
> On Tue, 12 Apr 2005 13:06:36 +0200, Roman Neuhauser
> <neuhauser+python-list#python.org at sigpipe.cz> wrote:
> 
> >    Unfortunately, the python community seems to bathe in the
> >    misorganized half-documentation, see e. g.
> >    http://marc.theaimsgroup.com/?l=python-list&m=111303919606261&w=2
> >    especially the reply that (as I read it) suggested reverse
> >    engineering as a viable alternative to documentation.
> 
> As I read the reply, it was a smart-arse attempt at humour, a *PUN* on
> the word "list" (mailing list versus Python list). What I would call
> "introspection" (not "reverse engineering") was then suggested.
> 
> Moreover, both of the concepts mentioned in the quoted thread
> (sequence.index() and the "in" operator) are IMESHO adequately
> documented.
> 
> Do you have any examples of what you regard as "misorganized
> half-documentation"?
 
    Description of classes:
    
    * What's with "Programmer's Note", is the other paragraph of the
      description aimed at salesmen?

    * Why isn't there a link to a description of "new-style classes"
      (presumably to the "New-style Classes" essay since, as
      http://www.python.org/doc/newstyle.html says, NSC aren't
      integrated into the standard documentation.

    * Aren't class objects instances of a builtin type? What should
      I read into "<class __main__.foo at 0x81c050c>"?

    distutils:

    * sections 10.26 through 10.45 are completely empty

    * http://docs.python.org/dist/listing-packages.html:
      "when you say packages = ['foo'] in your setup script" couldn't
      be any more vague I guess. Does the statement belong in the
      global scope?

    * http://docs.python.org/dist/listing-packages.html:
      "Then you would put package_dir = {'': 'lib'} in your setup
      script.": does that statement belong in the global scope, or
      is it a keyword argument for setup(), which would mean that the
      listing at http://docs.python.org/dist/module-distutils.core.html
      cannot be trusted as complete?

    lists: this is a matter of taste, but I find the split of list
    description between http://docs.python.org/lib/typesseq.html and
    http://docs.python.org/lib/typesseq-mutable.html (without pointers
    from typesseq.html to typesseq-mutable.html where I would expect
    them, such as mentioning append()) confusing.
    
    The above applies to other mutable sequential types as well, of
    course.

    In general, various parts of the documentation often refer the
    reader to other parts without using html anchors, what should be
    concise, accurate, and complete description is a meandering essay
    with vague formulations (see quotes from the distutils manual
    above), etc.

    There's also this thing with easy access to individual nodes:
    I often miss being able to type something like
    http://docs.python.org/os.path.expanduser and be redirected to 
    http://docs.python.org/lib/module-os.path.html#l2h-1731
    
    Mebbe it's just me, but I've been trying python on and off for
    several years now, and it's always been precisely its documentation
    that has made me back out. I know I'll get to know the language
    quite well some time, but it'll be through scars, and I'll have many
    f*cks behind me.

> Here's a puzzle for you: Where does this list appear? What's missing?
> 
> "..., Mullender, Nagata, Ng, Oner, Oppelstrup, ..."

    Sorry, I don't have time for puzzles.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From mwm at mired.org  Tue Apr 26 22:24:06 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 21:24:06 -0500
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
	<pan.2005.04.26.19.13.19.951487@jerf.org>
Message-ID: <86r7gxkldl.fsf@guru.mired.org>

Jeremy Bowers <jerf at jerf.org> writes:

> On Tue, 26 Apr 2005 03:40:16 -0700, ajikoe at gmail.com wrote:
> os.remove, as the module name implies, tells the OS to do something. I
> would consider an OS that returned from a "remove" call, but still let you
> access that file, highly broken. 

Um - not if you have permission to read the file, but don't have
permission to remove it. Whatever the "remove" call does in this case,
you *better* have access to it after the fact.  The "remove" call on
Unix (uka "unlink") returns even if it can't remove the file: it
returns 0 if it succeeds, and -1 if it doesn't.

os.remove is a little brighter than that. It will throw an OSError
exception if it can't remove the file.

          <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From rune.strand at gmail.com  Thu Apr 28 06:30:15 2005
From: rune.strand at gmail.com (runes)
Date: 28 Apr 2005 03:30:15 -0700
Subject: Setting win32 console title from Python
Message-ID: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>

Hi,
I'm trying to set the title of the console window (CMD.EXE) in Windows.
I want it set to the basename of the current directory and it should
stay after the script has finished.

Now, the console title is easily set with the DOS-command 'title
NewTitle'. But I'd like to do this from a Python script.

os.system('title NewTitle') will not do, because it spawns a new
process.

win32api.SetConsoleTitle('NewTitle') will not do either, because the
NewTitle is reset as soon as the script finishes.

Chris Gonnerman's WConio
<http://newcenturycomputers.net/projects/wconio.html>
has a settitle() method and
WConio.settitle("NewTitle") does what I want, but not under CMD.EXE,
only COMMAND.EXE.

Any ideas?



From littlejohn.75 at news.free.fr  Tue Apr  5 09:04:37 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 05 Apr 2005 13:04:37 GMT
Subject: check interpreter version before running script
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
Message-ID: <42528ce5$0$26833$626a14ce@news.free.fr>

Le Tue, 05 Apr 2005 08:57:12 -0400, rbt a ?crit :
> Is there a recommended or 'Best Practices' way of checking the version 
> of python before running scripts? I have scripts that use the os.walk() 
> feature (introduced in 2.3) and users running 2.2 who get errors. 
> Instead of telling them, 'Upgrade you Python Install, I'd like to use 
> sys.version or some other way of checking before running.
> 
> 
> I thought of sys.version... but getting info out of it seems awkward to 
> me. First 5 chars are '2.4.1' in string format have to split it up and 
> convert it to ints to do proper checking, etc. It doesn't seem that 
> sys.version was built with this type of usage in mind. So, what is the 
> *best* most correct way to go about this?
try:
    from os import walk as os_walk
except ImportError:
    os_walk = None
    # raise some exception  or implement a fallback solution
# use os_walk instead of os.walk
> 
> Thanks,
> 
> rbt


From RonGrossi_38131 at yahoo.com  Fri Apr  8 11:33:48 2005
From: RonGrossi_38131 at yahoo.com (RonGrossi_38131 at yahoo.com)
Date: 8 Apr 2005 08:33:48 -0700
Subject: =?iso-8859-1?q?THE_GREATEST_NEWS_EVER_!_=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
	=?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8?=
Message-ID: <1112974428.387180.103030@f14g2000cwb.googlegroups.com>

 
http://www.print-it-011.blogspot.com << The Greatest News Ever !



From apardon at forel.vub.ac.be  Wed Apr 13 02:23:26 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Apr 2005 06:23:26 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1793.1113334936.1799.python-list@python.org>
Message-ID: <slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-12, Robert Kern schreef <rkern at ucsd.edu>:
> Antoon Pardon wrote:
>
>> What licence can I use? Somewhere they say you can combine python
>> code with GPL code. Does that mean that the resulting code has
>> to have both the GPL license as the PSF license, as both seem
>> to want that derived work uses the same license.
>
> No, the PSF does not want that. It does not say so anywhere in the 
> license text. Yes, you can GPL the derived work. The licenses are 
> compatible.
>

This comes from the license text.

| 2. Subject to the terms and conditions of this License Agreement, PSF
| hereby grants Licensee a nonexclusive, royalty-free, world-wide
| license to reproduce, analyze, test, perform and/or display publicly,
| prepare derivative works, distribute, and otherwise use Python 2.3
| alone or in any derivative version, provided, however, that PSF's
| License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
| 2001, 2002, 2003 Python Software Foundation; All Rights Reserved" are
| retained in Python 2.3 alone or in any derivative version prepared by
| Licensee.

So what should I understand by: provided, however, that PSF's License
Agreement ... are retained in Python 2.3 alone or in any derivative 
version prepared by Licensee.

-- 
Antoon Pardon


From codecraig at gmail.com  Fri Apr 22 14:48:12 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 11:48:12 -0700
Subject: xmlrpclib.Server - how to disconnect
Message-ID: <1114195692.790677.204010@o13g2000cwo.googlegroups.com>

Hi,
   If I create a connection to a and XML-RPC server, how can the client
disconnect from the server?

CLIENT:
url = "http://1.1.1.1:1234"
server = xmlrpclib.Server(url)

server.doSomething()

now how do i disconnect my client from the server?

thanks



From fredrik at pythonware.com  Wed Apr 13 04:34:20 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 10:34:20 +0200
Subject: A command in a String ?
References: <pan.2005.04.13.08.25.53.59804@optushome.com.au>
Message-ID: <d3ilcd$o0v$1@sea.gmane.org>

Peter Moscatt wrote:

>I have a rather odd question:
>
> Is there a way Python can execute a command within a string ?
>
> For example if I had something like:
> _str = "fm=OptionMenu(root,xx,'string1','string2','string3')"
>
> And the execute _str.

exec _str

> The reason why I am trying to do this that as I am aware the OptionMenu
> hasn't the ability insert options therefore the options would be inserted
> by manipulating strings.

does this do what you want?

    strings = "string1", "string2", "string3"
    fm = OptionMenu(root, xx, *strings)

</F> 





From willitfw at gmail.com  Thu Apr 21 12:02:33 2005
From: willitfw at gmail.com (willitfw)
Date: 21 Apr 2005 09:02:33 -0700
Subject: Resolving 10060, 'Operation timed out'
References: <1114018777.408294.304200@z14g2000cwz.googlegroups.com>
	<42669814.9000104@syscononline.com>
	<q_GdnV7wcP9dbfvfRVn-vw@powergate.ca>
Message-ID: <1114099353.581868.292880@o13g2000cwo.googlegroups.com>

I'm including the code that I've been using.  I am relatively new to
python, and not sure if a socket was created:

*****************
import socket

socket.setdefaulttimeout(None)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

from urllib import urlopen
import urllib, urlparse, string, time

web = 'http://www.python.org'

socket.setdefaulttimeout(1200)
website = web

print website

pinhtml = urllib.urlopen(website)
data = pinhtml.read()
sock.close()
pinhtml.close()

*****************



From liyangdal at 163.com  Wed Apr 27 03:05:56 2005
From: liyangdal at 163.com (yang)
Date: Wed, 27 Apr 2005 15:05:56 +0800
Subject: about Frame.__init__(self)
Message-ID: <d4ne89$iqe$1@mail.cn99.com>

I just a newbie of python
Now I found that almost every program use Tkinter have this line

class xxx(xxx):
     """xxxxx"""

     def __init__(self):
         """xxxxx"""

         Frame.__init__(self)
         .....................
         .......


the line "Frame.__init__(self)" puzzle me.
why use it like this?
can some one explain it?
regards,
yang


From newstonne at web.de  Wed Apr 20 03:38:55 2005
From: newstonne at web.de (Roland Heiber)
Date: Wed, 20 Apr 2005 09:38:55 +0200
Subject: Python instances
In-Reply-To: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
Message-ID: <d450ub$2kp$1@news.web.de>

Hi,

> class MyClass:
>     list = []

you have "list" defined as a classmember, not an instancemember. So 
"list" ist defined ONCE for all instances.

Try this instead:

class MyClass:
     def __init__(self):
	self.list = []
[...]

and use self.list ...

HtH, Roland


From lbolognini at gmail.com  Thu Apr 28 05:06:58 2005
From: lbolognini at gmail.com (lbolognini at gmail.com)
Date: 28 Apr 2005 02:06:58 -0700
Subject: pyqt and Eric 3
In-Reply-To: <MPG.1cda1800975d5139989680@news2.atlantic.net>
References: <MPG.1cda1800975d5139989680@news2.atlantic.net>
Message-ID: <1114679217.996943.17730@f14g2000cwb.googlegroups.com>

http://kscraft.sourceforge.net/convert_xhtml.php?doc=pyqt-windows-install.xhtml

Lorenzo



From steve at holdenweb.com  Fri Apr 29 11:40:36 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 29 Apr 2005 11:40:36 -0400
Subject: Can .py be complied?
In-Reply-To: <d4qsmj$5gr$1@domitilla.aioe.org>
References: <426ec8f7_2@rain.i-cable.com>	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
	<d4qsmj$5gr$1@domitilla.aioe.org>
Message-ID: <d4tk6l$hb3$1@sea.gmane.org>

steve.leach wrote:
>> python -o foo.exe foo.py
>>
>> at the command line, and get an executable, without any further effort.
> 
> 
> Hence making the resulting program useless to users of most operating 
> systems.

Let's ignore for the moment whether including py2exe as a "battery" is a 
desirable thing from an abstract point of view. We may legitimately 
differ about that.

We should not forget in our enthusiasm for open source that while "users 
of most operating systems" might not find py2exe useful, "most users of 
operating systems" may well, since Windows users outnumber the rest 
several times.

There's nothing wrong with open source projects catering to a market, 
and there's nothing wrong with running open source software on a 
proprietary operating system. To behave otherwise might reduce the 
growth opportunities for Python and its community.

no-zealotry-please-ly y'rs  - steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From syd.diamond at gmail.com  Wed Apr  6 10:33:21 2005
From: syd.diamond at gmail.com (syd)
Date: 6 Apr 2005 07:33:21 -0700
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
In-Reply-To: <mailman.1418.1112762290.1799.python-list@python.org>
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
	<1112732528.830194.320710@z14g2000cwz.googlegroups.com>
	<mailman.1418.1112762290.1799.python-list@python.org>
Message-ID: <1112798001.228799.305360@g14g2000cwa.googlegroups.com>

Ok yall, here's my summary.  Thanks again for all the help.

Most importantly, upgrading to gnuplot-py 1.7 fixes this problem.

In gnuplot-py 1.6, this is the bottom line...

Does not fix:
Gnuplot.GnuplotOpts.prefer_fifo_data = 0

Fixes:
Gnuplot.GnuplotOpts.prefer_inline_data = 1

Fixes:  (placed between setting output and plot)
while 1:
  if os.path.isfile("myGraph.png"):
    break
  time.sleep(1)

As for matplotlib, I checked it out.  Looks amazing!  I really, really
like what demos I tried.

HOWEVER, I could not find a good way to do smoothing.  I like the
gnuplot bezier smoothing.  This wouldn't be the hardest thing in the
world to code, but I was a little disappointed.  If yall have any
ideas, bring em on!  :)



From vvikram at stanford.edu  Fri Apr  1 02:35:48 2005
From: vvikram at stanford.edu (Vikram)
Date: Thu, 31 Mar 2005 23:35:48 -0800
Subject: dictionary: sorting the values preserving the order
In-Reply-To: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
References: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
Message-ID: <Pine.GSO.4.44.0503312332250.26126-100000@epic19.Stanford.EDU>


hi,

assuming your key-value relationship is one-to-one then as a simple first
pass you can simply initialize d1={} and for i in d.keys(): d1[d[i]] = i
and pass d1 to your sortedDictValue3 function, no?

thanks,
			Vikram


On 31 Mar 2005, Rakesh wrote:

> Hi,
>   For a particular problem of mine, I want to sort <key, value> pairs
> by its value.
>
> Eg:
>
> Input:
>
> A, 4
> B, 5
> C, 1
> D, 2
> E, 3
>
> I would like the output to be:
>
> C
> D
> E
> A
> B
>
> i.e. I would like to get the keys in the sorted order of values.
>
> I did google around a little bit. One solution to a similar problem
> suggested is:
>
> # Courtesy:
> http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52306
> def sortedDictValues3(adict):
>     keys = adict.keys()
>     keys.sort()
>     return map(adict.get, keys)
>
> This gets a list sorted by the keys. How would I get a revised
> dictionary
> sorted by its values.
>
>



From modelnine at ceosg.de  Mon Apr  4 06:34:14 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 12:34:14 +0200
Subject: Raise Error in a Module and Try/Except in a different Module
In-Reply-To: <7f285d16.0504040211.1e1b8783@posting.google.com>
References: <7f285d16.0504040211.1e1b8783@posting.google.com>
Message-ID: <200504041234.18755.modelnine@ceosg.de>

Am Montag, 4. April 2005 12:11 schrieb Issa-Ahmed SIDIBE:

Try:

> import ModuleA
> ...
> class():
>    ...
>    try: a = ModuleA.FUNC1()
                           ^^ <-- Actually call the method.
>    except ModuleA.EXCP1: print 'catch'


HTH!

-- 
--- Heiko.
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From simon.brunning at gmail.com  Wed Apr 20 04:27:27 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 09:27:27 +0100
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <16996.30734.778261.632448@montanaro.dyndns.org>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
	<16996.30734.778261.632448@montanaro.dyndns.org>
Message-ID: <8c7f10c60504200127b1b6ddc@mail.gmail.com>

On 4/19/05, Skip Montanaro <skip at pobox.com> wrote:
> ... the documentation for the os
>     steve> module would also be available at
>     steve> http://python.org/doc/current/lib/module-os.html.
> 
> Time machine at work?  The above URL works for me now.

Yup, but it's not all unchanging. Take, for example,
<http://www.python.org/doc/current/tut/node16.html>. I have wanted to
steer people towards that page a number of times, and that node number
keeps changing.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From rkern at ucsd.edu  Mon Apr  4 21:35:40 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 04 Apr 2005 18:35:40 -0700
Subject: Python modules for image / map manipulation?
In-Reply-To: <d4c0d48005040418069d4ea65@mail.gmail.com>
References: <d4c0d48005040418069d4ea65@mail.gmail.com>
Message-ID: <d2sptr$k11$1@sea.gmane.org>

Stewart Midwinter wrote:
> I would like to do some image / map manipulation with Python. 
> 
> I've got a very large map file in .png format. My thought is to chop
> it up into small tiles using some method.  What Python module would be
> helpful for this?

The PIL. I'm not sure how well it handles files of your size (not least 
because you haven't actually *said* how large it is).

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

If that doesn't work, non-Python software, like ImageMagick, might do 
the trick.

   http://www.imagemagick.org/

> Next, when I obtain the start and end co-ordinates of a user's trip,
> I'd like to stitch together the approriate tiles and present the
> images that show the terrain the user has travelled over.
> 
> Lastly, I'd like to plot the GPS tracklog of the trip on top of the map. 
> 
> Any suggestions for modules or projects to help accomplish this?  It's
> a non-commercial hobby application.

Even if the PIL can't handle the big image, it should work like a charm 
piecing together the tiles afterwards.

I use PROJ.4 via pipes for cartographic projections.

   http://proj.maptools.org/

There is an addon to the matplotlib plotting library that contains a 
binding for the PROJ.4 library, but I haven't gotten it to work on my Mac.

   http://matplotlib.sourceforge.net/toolkits.html
 
http://sourceforge.net/project/showfiles.php?group_id=80706&package_id=142792

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From KittyMCooper at gmail.com  Thu Apr 28 00:00:28 2005
From: KittyMCooper at gmail.com (MsKitty)
Date: 27 Apr 2005 21:00:28 -0700
Subject: win32ui CreateFileDialog SLOW (since the SP2 Windows XP patch?)
In-Reply-To: <MPG.1cdae4d3b1ffa39698968e@news-server>
References: <1114644362.619393.317800@l41g2000cwc.googlegroups.com>
	<MPG.1cdae4d3b1ffa39698968e@news-server>
Message-ID: <1114660828.584660.126820@f14g2000cwb.googlegroups.com>

Neil -
Interesting theory, but I installed brand new versions of Python
(2.4.1) and the win32 extensions on a machine that had no Python and
got the the same 4 minute response time, so that does not seem a likely
explanation, although its possible.
  - Kitty



From fredrik at pythonware.com  Fri Apr  8 16:13:06 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 22:13:06 +0200
Subject: Equivalent string.find method for a list of strings
References: <d36hnj$6h6$1@sea.gmane.org>
Message-ID: <d36oft$t8j$1@sea.gmane.org>

"jeremit0" <jeremit0 at gmail.com> wrote:
>I have read a text file using the command
>
> lines = myfile.readlines()
>
> and now I want to seach those lines for a particular string.  I was hoping there was a way to 
> "find" that string in a similar way as searching simply a simple string.  I want to do something 
> like
>
> lines.find.('my particular string')
>
> Is there a module that already exists that allows me to do this or will I have to created my own 
> method?

are you looking for a line that's equal to "my particular string", or a list that
*contains* "my particular string".

if the former, use

    index = lines.index("my particular string\n") # note the trailing newline

if the latter, you have to loop over the lines, and call the find method on each
one of them (alternatively, if all you want to know if "my particular string" is
anywhere in the file, just load the *entire* file using myfile.read(), and use find
on the entire file)

</F> 





From vslavov at gmail.com  Tue Apr 19 00:40:01 2005
From: vslavov at gmail.com (Vasil Slavov)
Date: Mon, 18 Apr 2005 23:40:01 -0500
Subject: uploading/streaming a file to a java servlet
Message-ID: <a179fedc05041821402d11cf5c@mail.gmail.com>

I apologize for the long email. I hope somebody will have time to read
it and give some suggestions.

I am working on a school project written in Python (using mod_python)
and I need to upload a file to a java servlet. Here are the high-level
instructions given by the servlet authors (the instructions are geared
towards my C#/VB competition (and I really want to show them how cool
Python is):

- Open the file for reading.
- Open an HTTP connection to the servlet and get the RequestStream object.
- Read bytes from the file and write them to the stream until the
entire file has been read.
- Close the stream.

Here is how the url looks like:
http://10.0.0.21/MillenniumMobile/servlet/com.cerner.capstone.dictation.FileStorageServlet?TransactionName=AddDictationFile&FileName=myfile.wav&Username=team1&Password=password&Domain=mobj

I am having a hard time figuring out how to translate the above
instructions into something which can be implemented in Python. How am
I supposed to "stream" the file.

I get a successful XML response with the following code, but
obviously, it doesn't do anything useful because it doesn't actually
upload the file:

url = "http://10.0.0.21/MillenniumMobile/servlet/"
servlet = "com.cerner.capstone.dictation.FileStorageServlet"
params = urllib.urlencode({'TransactionName':'AddDictationFile','FileName':'myfakefile.wav'})
request = urllib2.Request("".join([url, servlet]), params)
request.add_header('User-Agent', 'Velositer')
request.add_header('Cookie', sessid)
opener = urllib2.build_opener()
datastream = opener.open(request)
# I am using mod_python
req.write(datastream.read())

I tried urllib2_file.py:
http://fabien.seisen.org/python/urllib2_multipart.html

with which you can do stuff like:
data = [('TransactionName','AddDictationFile'),('FileName','back9.jpg'),('file',open(file,'rb'))]
request = urllib2.Request("".join([url, servlet]), data, headers)
response = urllib2.urlopen(request).read()

and this:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306

but they don't work. I get errors that the servlet can't parse the XML request.

Any suggestions would be greatly appreciated.

Thanks in advance,
Vasil


From harlinseritt at yahoo.com  Fri Apr 29 06:35:26 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 29 Apr 2005 03:35:26 -0700
Subject: Getting PID for process
Message-ID: <1114770926.016150.181310@l41g2000cwc.googlegroups.com>

Let's say I have a simple script on Windows NT. I would like for that
script to find its own PID once it's started and store that as a value
within the script. Also, down the road I'd like to kill that process by
its PID. How is this done?

Thanks,

Harlin Seritt



From timr at probo.com  Wed Apr 27 01:53:43 2005
From: timr at probo.com (Tim Roberts)
Date: Tue, 26 Apr 2005 22:53:43 -0700
Subject: Getting into Python, comming from Perl.
References: <mailman.2409.1114365369.1799.python-list@python.org>
	<slrnd6pd48.uga.nick@irishsea.home.craig-wood.com>
Message-ID: <75au619qpianhqjofhqmr8jenf1eol0abq@4ax.com>

Nick Craig-Wood <nick at craig-wood.com> wrote:
>
>I have had a similar experience.  Actually it was Perl 6, and and
>particular this chart
>
>  http://www.ozonehouse.com/mark/blog/code/PeriodicTable.html
>
>that made me think that Perl was leaving the rails, and it was time to
>jump ship (to mix my metaphors).

That is truly wonderous.  Are you famliar with the phrase "jumping the
shark"?  This chart might prove that, with Perl 6, Perl has now "jumped the
shark".
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From fredrik at pythonware.com  Mon Apr 11 10:14:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 16:14:59 +0200
Subject: variables exist
References: <9622d535.0504110552.1e070e8d@posting.google.com>
Message-ID: <d3e0jj$93d$1@sea.gmane.org>

"fabian" wrote:

> how testing if a variable exists in python as isset in php??

try:
    variable
except NameError:
    print "variable not set"

but that is really lousy Python; better make sure you always assign to
all variables, and use None (or another suitable value) to mark that some
variable has no meaningful content right now.

that is, instead of

    if condition:
        variable = 1

    ...

    try:
        variable
    except NameError:
        ....

write

    variable = None

    if condition:
        variable = 1

    ...

    if variable is None:
        print "variable not set"

</F> 





From ivanlan at pauahtun.org  Tue Apr  5 17:09:24 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 05 Apr 2005 15:09:24 -0600
Subject: IronPython 0.7 released!
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
Message-ID: <4252FE84.3F01C8FE@pauahtun.org>

Hi All--

Tim Peters wrote:
> 
> not-mentioning-that-i-don't-feel-particularly-embraced-yet-ly y'rs  - tim
> 

Don't worry, Tim.  You will.

<it-only-takes-a-little-groupthink-exercise>-ly y'rs,
Ivan

Meta:  <1984-in-what-base-was-that?>-ly y'rs,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From enjoy_linux at hotmail.com  Thu Apr 14 01:56:44 2005
From: enjoy_linux at hotmail.com (MaHahaXixi)
Date: Thu, 14 Apr 2005 13:56:44 +0800
Subject: how to explain such codes, python's bug or mine?
References: <d3iqhe$1s0l$1@mail.cn99.com><1113386913.961445.165950@z14g2000cwz.googlegroups.com><d3j0pf$1tjo$1@mail.cn99.com>
	<mailman.1832.1113394505.1799.python-list@python.org>
Message-ID: <d3l0vc$2g9p$1@mail.cn99.com>

SORRY, my inattention
"Fredrik Lundh" <fredrik at pythonware.com> wrote in message
news:mailman.1832.1113394505.1799.python-list at python.org...
> "MaHahaXixi" <enjoy_linux at hotmail.com> wrote:
>
> > for python, i am a newbie, but i did not found the warning of such usage
> > from the python tutorial
>
>     "4.2 for Statements"
>
>     "It is not safe to modify the sequence being iterated over in the loop
(this
>     can only happen for mutable sequence types, such as lists). If you
need
>     to modify the list you are iterating over (for example, to duplicate
selected
>     items) you must iterate over a copy." (followed by an example)
>
> </F>
>
>
>




From rbt at athop1.ath.vt.edu  Tue Apr 26 16:49:57 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 26 Apr 2005 16:49:57 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <tsd2k2-ed4.ln1@lairds.us>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
	<xImdnW33JJiov_DfRVn-iw@powergate.ca>
	<d4j91s$bfp$1@solaris.cc.vt.edu> <tsd2k2-ed4.ln1@lairds.us>
Message-ID: <d4m9hl$8br$1@solaris.cc.vt.edu>

Cameron Laird wrote:
> In article <d4j91s$bfp$1 at solaris.cc.vt.edu>,
> rbt  <rbt at athop1.ath.vt.edu> wrote:
> 			.
> 			.
> 			.
> 
>>OK, I'm done seeking to provoke. So, it's official. Perl has *much*, 
>>*much* better support for dealing with PDF files than does Python. 
> 
> 			.
> 			.
> 			.
> No, it's not; maybe Perl even has *worse* support.  At the very least,
> there's more redundancy in what Perl offers.
> 
> I understand that <URL: http://cpan.uwinnipeg.ca/search?query=pdf&mode=dist >
> looks rather convincing; in fact, a couple of years ago, we argued <URL:
> http://www.unixreview.com/documents/s=7822/ur0304g/ > that indeed Perl was
> ahead.  I'm not sure that's true now.  
> 
> Rather than wander into all the details, let's start over:  what kinds of
> things do you think you want to do with PDFs?  You might be surprised to
> find that, despite all that CPAN *seems* to offer, your needs aren't met
> at all.  Or maybe they are.  It depends.  Let's get specific.

Read and search them for strings. If I could do that on windows, linux 
and mac with the *same* bit of Python code, I'd be very happy ;)


From newsclient at high.speedlinq.nl  Wed Apr 13 12:49:16 2005
From: newsclient at high.speedlinq.nl (Matthijs)
Date: Wed, 13 Apr 2005 18:49:16 +0200
Subject: Using a python web client behind a proxy (urllib and twisted.web)
Message-ID: <d3jiid$lne$1@azure.qinip.net>

I have been trying to make a script that will download several rss feeds 
to my computer. The only problem I have is that I have to go through a 
proxy.

First I tried using urllib (python 2.4, win32) but I found that the 
http_proxy and no_proxy code were not implemented for win32. I have made 
changes to urllib and urllib2 so that they use the proxy set in either 
the windows registry or in an environment variable.

Question: How can I get this code added to the python distribution?

Then I found this script: 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277099

which uses twisted.web and does asynchronous requests, which is nice 
when you want to download a lot of rss feeds. But again it doesn't 
support a proxy, that I could find.

Question: Am i right that twisted.web.client does not support proxying?

Kind regards,
Matthijs

ps. I am just starting with Python


From tundra at tundraware.com  Tue Apr 12 15:37:35 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 12 Apr 2005 15:37:35 EDT
Subject: [ANN]: mkapachepw 1.21 Released And Available
Message-ID: <59kti2-g8s.ln1@eskimo.tundraware.com>

'mkapachepw' Version 1.121 is now released and available for download at:

          http://www.tundraware.com/Software/mkapachepw

This is the first public release of the program.

A FreeBSD port has been submitted as well.


What Is 'mkapachepw'?
------------------

'mkapachepw' is an Apache user/group management package with a
rich set of features:

   - Automatically Create Apache Users/Groups From Underlying OS Users/Groups:

     'mkapachepw' can extract any or all Unix system users and/or
     groups and automatically include them in the production
     Apache user and group files.  This makes it easy to
     manage users via the traditional Unix tools and propagate
     this information for Apache's use.  Note that for this to work,
     Apache has to understand the hash algorithm the underlying
     Unix system uses to encrypt password.

   - Break Large, Complex User & Group Data Into Separately Managed Files:

     User/Group files can be constructed out of any number of
     subsidiary files.  This allows the webmaster to combine
     separate user and group files that are independently
     managed by, say, Marketing, Engineering, Sales, and so on,
     into single, production Apache user and group files.

   - Specify Which Particular Users/Groups Are To Be Included Or Excluded:

     Specific users and/or groups can be explicitly included or
     excluded in the final user and group files.  This can
     be done by name, UID, or GID.  These in/exclusions are applied
     to both system users/groups, as well as those found in the
     subsidiary files.

   - Catch (And Prevent) Redefinition Of User/Groups:

     "Collisions" of users or groups are caught, and optionally,
     prevented.   Say the Marketing user file has a user
     named "bob", and so does Engineering.  If an attempt is
     made to consolitate these two subsidiary files into a single
     Apache user file, 'mkapachepw' will, by default, issue
     a warning (and the last definition will be that one loaded
     into the Apache user file).   A command line switch is
     available to prevent this entirely by issuing an error and
     exiting on the first collision encountered.

'mkapachepw' is a pure-Python application and should run on
any Unix system that support Python 2.4 or later.  The program
is known to work on FreeBSD.

See the web page for licensing terms and the complete documentation.


------------------------------------------------------------------------------
Tim Daneliuk
tundra at tundraware.com











From neuhauser+python-list#python.org at sigpipe.cz  Sun Apr 10 07:06:39 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Sun, 10 Apr 2005 13:06:39 +0200
Subject: email and smtplib modules
In-Reply-To: <86d5t3wrtf.fsf@guru.mired.org>
References: <1113081060.969295.36900@o13g2000cwo.googlegroups.com>
	<86d5t3wrtf.fsf@guru.mired.org>
Message-ID: <20050410110639.GD76849@isis.sigpipe.cz>

# mwm at mired.org / 2005-04-09 16:42:04 -0500:
> "mark.greenbank at gmail.com" <mark.greenbank at gmail.com> writes:
> 
> > Hi,
> >
> > I'm writing a small script that generates email and I've noticed that:
> >
> > 1) one should add the 'To' and 'CC' headers to the email message
> > 2) one needs to specify the recipients in the smtplib sendmail() method
> >
> > Can someone explain how these are related?

    ...

> This design makes many things possible. Most used these days is spam
> delivered to one address while apparently to another.

    What about mailing lists? Quoting from your message as it arrived
    here:

    Return-Path: python-list-bounces+neuhauser+python-list#python.org=sigpipe.cz at python.org
    X-Original-To: neuhauser+python-list#python.org at sigpipe.cz
    From: Mike Meyer <mwm at mired.org>
    To: python-list at python.org

    For the OP:
    
    Return-Path: header contains the envelope sender (SMTP MAIL command)
    X-Original-To: is the envelope recipient (SMTP RCPT command)
    
    So, despite the email claiming to be sent from Mike to the list,
    it's actually from the list to me.

    Please take Mike's note about spam with two grains of salt, the
    distinction between headers and envelope is vital to the SMTP
    protocol and many services built around it.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From bokr at oz.net  Wed Apr 20 04:45:18 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 08:45:18 GMT
Subject: Python instances
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
	<d450ub$2kp$1@news.web.de>
	<1113983093.813565.23430@l41g2000cwc.googlegroups.com>
Message-ID: <42661348.42995424@news.oz.net>

On 20 Apr 2005 00:44:53 -0700, henrikpierrou at hotmail.com wrote:

>Guess i shouldn't think of the __init__(self) function as a constructor
>then.
>Thanks.
Depends on what you think when you think "constructor" ;-)
Read about both __new__ and __init__. The former is always
necessary to create an object, and __init__ may take parameters to
define intial state from its parameters, but __new__ does the whole
job for immutables. I.e., "constructor" translates to combination of
both if both are present, but __new__ must be always be there and
come first. In general there are default methods inherited from
object and/or type, the most primitive classes, so you don't have
to define them except to customize for your purposes.
At least, that's the way I think of it ;-)

Regards,
Bengt Richter


From Sizer at nospam.com  Sun Apr 10 02:11:21 2005
From: Sizer at nospam.com (Sizer)
Date: 10 Apr 2005 01:11:21 -0500
Subject: ANN: Wavy Navy 1.00 (Pygame shoot 'em up)
Message-ID: <mailman.1693.1113233954.1799.python-announce-list@python.org>

Wavy Navy 1.00 is now available at http://sizer99.com/wavy/
under BSD License.

This is a Pygame shoot-em-up based on the 1983 Sirius Software
game by Rodney McAuley.

Created from scratch in about 3 weeks of my spare time using Python and
Pygame as a test project for Pygame (which was easily up to the task).
My art and sound skills are weak, so if you'd like to create better 
art and sound effects the game is nearly fully skinnable and I
welcome contributions!

I still enjoy playing the game, even after spending three weeks of
my life making it, I hope you will enjoy it!

sizer at san.rr.com

<P><A HREF="http://sizer99.com/wavy/>Wavy Navy 1.00</A> - Pygame shoot 
'em up.  (09-Apr-05)


From osv at javad.ru  Thu Apr 21 11:17:46 2005
From: osv at javad.ru (Sergei Organov)
Date: 21 Apr 2005 19:17:46 +0400
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
	<116fbo3pma1lsdb@corp.supernews.com> <d48eov$ddn$2@n6.co.ru>
	<116fg649v5rsf14@corp.supernews.com>
Message-ID: <d48g6q$f66$1@n6.co.ru>

Grant Edwards <grante at visi.com> writes:

> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> > Grant Edwards <grante at visi.com> writes:
> >
> >> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> >> 
> >> > Well, I'm writing for embedded realtime systems in C/C++ and
> >> > have never encountered a single need to use goto.
> >> 
> >> I have encountered situations in C programs where the best
> >> thing to use was a goto.  Those situations have always been
> >> handled beutifully by a "raise" in Python.
> >
> > setjmp/longjump?
> 
> I've always found setjmp/longjmp much more confusing and hard
> to maintain than a simple goto.  It also requires library
> support that goto doesn't.

Agreed. The 'goto error' idiom is in fact the only goto usage I do
agree with provided there is no support for exceptions, but that's not
applicable to Python anyway.

-- 
Sergei.


From codecraig at gmail.com  Thu Apr 21 08:01:26 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 05:01:26 -0700
Subject: Define Constants
In-Reply-To: <mailman.2203.1114032148.1799.python-list@python.org>
References: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>
	<mailman.2203.1114032148.1799.python-list@python.org>
Message-ID: <1114084886.513470.149770@f14g2000cwb.googlegroups.com>

Thanks for the input.

i am renaming my module to be customthing.  I noticed that is how many
python modules are, so I will stick to the "convention".

Thanks for the help.



From rixdelei at hotmail.com  Tue Apr 12 16:25:53 2005
From: rixdelei at hotmail.com (rixdelei)
Date: Tue, 12 Apr 2005 22:25:53 +0200
Subject: loading binary image data into memory
References: <d3f6bo$2thb$1@news.wplus.net>
Message-ID: <d3hasu$2mtq$1@news.wplus.net>


tx vm guys, helped a lot

"rixdelei" <rixdelei at hotmail.com> escribi? en el mensaje 
news:d3f6bo$2thb$1 at news.wplus.net...
>
> Hi there!
> Tried successfully downloading data into memory from internet using the 
> urllib module like this:
> ...
> import urllib
> import cStringIO
>
> url_file = urllib.urlopen(url)
> img = cStringIO.StringIO(url_file.read())
> ...
> Was wondering HOW could I accomplish the same results using the ftplib 
> module
> -> retrbinary( command, callback[, maxblocksize[, rest]])
> WITHOUT saving any information to the disk;
>
> Will appreciate your comments,
> TIA+BRGDS
> 




From aahz at pythoncraft.com  Tue Apr  5 22:29:28 2005
From: aahz at pythoncraft.com (Aahz)
Date: 5 Apr 2005 22:29:28 -0400
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
Message-ID: <d2vhi8$k29$1@panix1.panix.com>

In article <mailman.1222.1112417820.1799.python-list at python.org>,
=?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
>[Aahz]
>> =?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
>>>
>>>No doubt it once was true, but I guess this ideal has been
>>>abandoned a few years ago.  My honest feeling is that it would be a
>>>mis-representation of Python, assertng today that this is still one
>>>of the Python's ideals.
>>
>> Mind providing evidence rather than simply citing your feelings?
>
>The important word was "honest", not "feeling". :-)

Fair enough.

>> Yes, there's certainly redundancy in Python right now, but a large
>> portion of that will go away in Python 3.0.
>
>And when will that be?  The principle of "there is only way to do it"
>was observable in Python 1.5.2, and started to disappear at that time.
>How many years between 1.5.2 and 3.0?
>
>> So where's the abandonment of the ideal?
>
>Many of us are using Python today, week after week, year long.  So
>let's be pragmatic.  Python is what it became and now is.  Let's not
>define it as a memory from the past nor as a futuristic dream.

You're free to continue using 1.5.2.  Why don't you?  Because you want
shiny new features only available in current releases.  To maintain true
"only one way", existing features would need to be removed -- but that
would break backward compatibility.  Given the tension of the various
requirements, I think that Python has broken "only one way" as little as
possible, with the full intention of getting closer to its ideal when the
time comes to break backward compatibility.

You just can't have your cake and eat it, too.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From daniel at bowettsolutions.com  Wed Apr 27 04:54:54 2005
From: daniel at bowettsolutions.com (Daniel Bowett)
Date: Wed, 27 Apr 2005 09:54:54 +0100
Subject: Secure FTP
Message-ID: <d4nka1$atl$1@sea.gmane.org>

I need to download files over a secure channel.

I have been looking into Paramiko which seems to have the functonality I 
need. The problem is I need a FTP server which supports key based 
encryption to install on my windows server.

Has anyone succeeded in doing this? If so - what FTP server did you use?

Dan.



From rkern at ucsd.edu  Mon Apr  4 22:26:49 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 04 Apr 2005 19:26:49 -0700
Subject: Python modules for image / map manipulation?
In-Reply-To: <d2sptr$k11$1@sea.gmane.org>
References: <d4c0d48005040418069d4ea65@mail.gmail.com>
	<d2sptr$k11$1@sea.gmane.org>
Message-ID: <d2ssto$r34$1@sea.gmane.org>

Robert Kern wrote:

> I use PROJ.4 via pipes for cartographic projections.
> 
>   http://proj.maptools.org/
> 
> There is an addon to the matplotlib plotting library that contains a 
> binding for the PROJ.4 library, but I haven't gotten it to work on my Mac.
> 
>   http://matplotlib.sourceforge.net/toolkits.html

Just checked out version 0.1.2 of the basemap toolkit, and it works like 
a charm. 0.1.1 was the version not working for me.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From steve at holdenweb.com  Mon Apr 11 10:57:32 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 11 Apr 2005 10:57:32 -0400
Subject: args attribute of Exception objects
In-Reply-To: <8dad5312.0504110231.68f6a21b@posting.google.com>
References: <mailman.1526.1112952761.1799.python-list@python.org>	<pan.2005.04.08.16.07.30.85408@jerf.org>
	<8dad5312.0504110231.68f6a21b@posting.google.com>
Message-ID: <d3e32q$il7$1@sea.gmane.org>

Sebastien de Menten wrote:
> Jeremy Bowers <jerf at jerf.org> wrote in message news:<pan.2005.04.08.16.07.30.85408 at jerf.org>...
> 
>>On Fri, 08 Apr 2005 09:32:37 +0000, S??bastien de Menten wrote:
>>
>>
>>>Hi,
>>>
>>>When I need to make sense of a python exception, I often need to parse the 
>>>string exception in order to retrieve the data.
>>
>>What exactly are you doing with this info? (Every time I started to do
>>this, I found a better way. Perhaps one of them will apply for you.)
>>
>>(As a general comment, I'd point out that you don't have to check the
>>entire error message; checking for a descriptive substring, while still
>>not "safe", is at least safe*r*.)
> 
> 
> I have symbolic expressions in a dictionnary like:
> 
> dct = dict( a = "b**2 + c", b = "cos(2.3) + sin(v)", v = "4", c =
> "some_very_expensive_function(v)")
> 
> I want to build a function that finds the links between all those
> expressions (think about computing dependencies between cells in a
> spreadsheet).
> 
> All I do is:
> def link(name):
>    dependencies = {}
>    while True:
>       try:
>          eval(dct[name], globals(), dependencies)
>       except NameError,e:
>          dependencies[e.args[0][6:-16]] = 1
>       else:
>          return dependencies
> 
> globals() can be replaced by a custom dictionnary for security
> purposes.
> variation on the theme can:
>   - check SyntaxError and give interlligent feedback to user (BTW,
> SyntaxError args are much smarter)
>   - find or/and eval recursively the whole tree and keep in cache
> values,...
> 
> Seb
Wouldn't it actually be better to use a namespace that reported attempts 
to use its members? Then when you evaluated an expression you would be 
in control of how the attempted accesses were recorded, and could 
provide exactly the needed information.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From rune.strand at gmail.com  Fri Apr 15 22:11:44 2005
From: rune.strand at gmail.com (runes)
Date: 15 Apr 2005 19:11:44 -0700
Subject: Piping data into script under Win32
Message-ID: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>

I trying to figure out a way to make a python script accept data output
from another process under Windows XP, but I fail miserably. I have a
vague memory having read this is not possible with Python under
Windows...

But googling for a clue I came across this from /Learning Python/ (Lutz
& Ascher) [1]


<Learning Python>

import sys
data = sys.stdin.readlines()
print "Counted", len(data), "lines."

On Unix, you could test it by doing something like:


% cat countlines.py | python countlines.py
Counted 3 lines.

On Windows or DOS, you'd do:


C:\> type countlines.py | python countlines.py
Counted 3 lines.

</Learning Python>


So: Is it possible to pipe data under DOS/Win9x but not NT/2k/XP or is
it a bug in /Learning Python/ ?


I've tried about all kinds of sane and insane approaches involving
sys.stdin, but they all results in IOError: [Errno 9] Bad file
descriptor.


[1] <http://www.oreilly.com/catalog/lpython/chapter/ch09.html>



From and-google at doxdesk.com  Mon Apr 11 03:49:17 2005
From: and-google at doxdesk.com (and-google at doxdesk.com)
Date: 11 Apr 2005 00:49:17 -0700
Subject: Python 2.4.1 install broke RedHat 9 printconf-backend
In-Reply-To: <1113176970.564908.293230@o13g2000cwo.googlegroups.com>
References: <1113176970.564908.293230@o13g2000cwo.googlegroups.com>
Message-ID: <1113205757.344865.304460@o13g2000cwo.googlegroups.com>

BrianS wrote:

>   File "/usr/share/printconf/util/printconf_conf.py", line 83, in ?
>     from xml.utils import qp_xml
> ImportError: No module named utils

> It seems that the xml package have been changed.

Not exactly. xml.utils is part of the XML processing package PyXML -
you don't get it in the cut-down XML stuff available in the standard
library.

You could try downloading and installing from http://pyxml.sf.net/.
Though I can't guarantee there won't be other problems as RedHat can be
very annoying like this. You might have to keep Python 2.2 around in
addition to 2.4 for RH's benefit; in any case trying to remove 2.2 will
probably lead you into an RPM dependency nightmare.

-- 
Andrew Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/



From nid_oizo at yahoo.com_removethe_  Sun Apr  3 20:02:22 2005
From: nid_oizo at yahoo.com_removethe_ (Nicolas Fleury)
Date: Sun, 03 Apr 2005 20:02:22 -0400
Subject: threading.Event file descriptor
In-Reply-To: <1112569514.641782.165380@f14g2000cwb.googlegroups.com>
References: <zxM3e.55834$rl.2020212@weber.videotron.net>
	<1112562641.542176.202030@z14g2000cwz.googlegroups.com>
	<8XZ3e.13367$g_5.314475@wagner.videotron.net>
	<1112569514.641782.165380@f14g2000cwb.googlegroups.com>
Message-ID: <Ur%3e.14521$g_5.388780@wagner.videotron.net>

elbertlev at gmail.com wrote:
> //And there's no handle at all?
> 
> There is one (check thread_nt.h) you have to "propagate" HANDLE to
> Pythom level. That's why, you have to change the interpreter. Do not
> forget, that thread is a build-in module.

Sounds fine with me.  A fileno (or whatever) function can be added to 
threading.Event on all platforms, giving access to internal file 
descriptor/handle.

> //I wouldn't want to derive from Event since my goal would be to submit
> a
> patch to make subprocess.Popen.wait take an optional threading.Event to
> kill the process.
> 
> And that's it? Right now aquire_lock is non-interruptable, as a result
> your Popen.wait is also non-interruptable, but if you pass derived
> event you will be able to handle more generic cases.

I'm not 100% sure I understand what you say.  Support killing the 
process with any handle, not only an event, would be a good thing.  But 
it doesn't change the fact that, IMHO, the usefulness of threading.Event 
is just too limited if it doesn't support select or 
WaitForMultipleObjects.  I think also that threading.Thread should give 
access to its internal handle (at least thread module does).

Regards,
Nicolas


From bearophileHUGS at lycos.com  Fri Apr 29 17:51:33 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 29 Apr 2005 14:51:33 -0700
Subject: Sorting an Edge List
References: <fLqdne0t4Y81OO_fRVn-qw@comcast.com>
Message-ID: <1114811493.206517.85150@g14g2000cwa.googlegroups.com>

Anthony D'Agostino, this is my first raw version, it can fail in lots
of ways depending on your input list l (and surely there are better
ways to do it), but it's a start:

. l = [('A','Y'), ('J','A'), ('Y','J')]
. pairs = dict(l)
. result = []
. key = pairs.iterkeys().next()
. while pairs:
.     val = pairs.pop(key)
.     result.append( (key, val) )
.     key = val
. print result

Bear hugs,
Bearophie



From tjreedy at udel.edu  Tue Apr 19 15:26:59 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 19 Apr 2005 15:26:59 -0400
Subject: Refactoring in Python.
References: <8764yiog3y.fsf@hector.domek><mailman.2120.1113930792.1799.python-list@python.org>
	<87y8bemxhy.fsf@hector.domek>
Message-ID: <d43lq7$fhr$1@sea.gmane.org>


"Peter Dembinski" <pdemb at gazeta.pl> wrote in message 
news:87y8bemxhy.fsf at hector.domek...
>     Peter> I am trying to write Master Thesis on refactoring Python
>     Peter> code.  Where should I look for information?

As best I remember, there has been little posted here over several years 
other than general comments like 'Python makes it easier to refactor'.  So 
there is room for you to do something new ;-).

Where to look: if you have not already, read the tutorial, at least chap 2 
of the Library Ref, and at least skim the FAQ.  Use Google or whatever for 
web searches.  Specifically use Google for searching its archives of 
comp.lang.python.  Then ask specific questions here.

>The idea is to define some 'mechanics' for refactoring Python code
>without specialized refactoring browser.  In other words, I want
>to convert Fowler's refactorizations to Python.

> Similar work (or its seeds) is here:
> http://hiper.com.br/python/refactor/index.html

I have not seen this before.  Since he only did chapter 1, I think 'seed' 
is the word.

Another specifically helpful reference might be Beck's (author?) book on 
Test-Driven Development.  Part 1 uses an example in Java, I believe.  Part 
2, I know, uses an example in Python.  There at least used to be a copy 
online.

Wishing you an 'A' and hoping to see the result online...
Terry J. Reedy






From py.adriano at gmail.com  Tue Apr 19 09:19:56 2005
From: py.adriano at gmail.com (Adriano Monteiro)
Date: Tue, 19 Apr 2005 10:19:56 -0300
Subject: Variables variable
Message-ID: <29ec2154050419061977e4210@mail.gmail.com>

Hi folks,

Someone know how to make variables variable like in PHP?
It's something like this:

$a = 'hi'
$$a = 'testing'
echo $hi
'testing'

Regards

-- 

Adriano Monteiro Marques
www.gopython.com.br
py.adriano at gmail.com

I'm FREE... Are you?
(PYTHON powered)


From neuhauser+python-list#python.org at sigpipe.cz  Thu Apr 14 10:36:40 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Thu, 14 Apr 2005 16:36:40 +0200
Subject: A little request about spam
In-Reply-To: <425E7CB8.85DD2BA4@pauahtun.org>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<425E7CB8.85DD2BA4@pauahtun.org>
Message-ID: <20050414143640.GA94191@isis.sigpipe.cz>

# ivanlan at pauahtun.org / 2005-04-14 08:22:48 -0600:
> The listowner could turn on the [PYTHON] headers.

    I hope they don't.

> I'm not using spambayes yet, although I'm leaning toward it, but that
> step alone could save me some work when trying to decide based on
> subject line alone whether or not an email is spam.  As it stands now,
> it's too easy to decide incorrectly that "Subject: Inelegant" is a
> spamdunk.

    Don't base your decisions (only) on subject then. Oh, and spam sent
    through the list would have the [PYTHON] space eater too, so what
    would it buy you?

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From steve at holdenweb.com  Sat Apr 30 09:23:16 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 30 Apr 2005 09:23:16 -0400
Subject: Best way to parse file into db-type layout?
In-Reply-To: <fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>	<d4vn0s$i3b$1@gemini.csx.cam.ac.uk>
	<fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>
Message-ID: <d500gs$ocg$1@sea.gmane.org>

John Machin wrote:
[...]
> 
> I wouldn't use fileinput for a "commercial data processing" exercise,
> because it's slow, and (if it involved using the Python csv module) it
> opens the files in text mode, and because in such exercises I don't
> often need to process multiple files as though they were one file.
> 
If the process runs once a month, and take ten minutes to process the 
required data, isn't that fast enough. It's unwise to act as though 
"slow" is an absolute term.

> When I am interested in multiple files -- more likely a script that
> scans source files -- even though I wouldn't care about the speed nor
> the binary mode, I usually do something like:
> 
> for pattern in args: # args from an optparse parser
>     for filename in glob.glob(pattern):
>         for line in open(filename):
> 
> There is also an "on principle" element to it as well -- with
> fileinput one has to use the awkish methods like filelineno() and
> nextfile(); strikes me as a tricksy and inverted way of doing things.
> 
But if it happens to be convenient for the task at hand why deny the OP 
the use of a tool that can solve a problem? We shouldn't be so purist 
that we create extra (and unnecessary) work :-), and principles should 
be tempered with pragmatism in the real world.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fredrik at pythonware.com  Tue Apr 12 02:37:47 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 08:37:47 +0200
Subject: some sort of permutations...
References: <9468aec7.0504112228.5d018278@posting.google.com>
Message-ID: <d3fq51$iho$1@sea.gmane.org>

"Bernard A." wrote:

> i'm looking for a way to have all possible length fixed n-uples from a
> list, i think generators can help, but was not able to do it myself,
> maybe some one could point me out to an idea to do it ?

did you try googling for "python permutations" ?

here's the first hit:

    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465

</F> 





From pgmoscatt at optushome.com.au  Mon Apr 18 17:33:28 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Tue, 19 Apr 2005 07:33:28 +1000
Subject: Can a function be called within a function ?
References: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
Message-ID: <426426ba$0$5891$9a6e19ea@news.newshosting.com>

Thanks Guys,

I didn't think it was calling the function so I will put some test code and
print something to the screen just to ensure it's entering the function.

Thanks for all ya help.

Pete




Peter Moscatt wrote:

> 
> Is it possible to write code and allow a function to be called within
> another like I have shown below ?
> 
> Pete
> 
> 
> 
> def populatelist():
>         f=open(_globals.appath + "dxcluster.svr","r")
>         while true:
>                 text = f.readline()
>                 if text =="":
>                         break
>                 _list.append(string.strip(text))
>         f.close()
>         
>         
> def serversettings():
>         servers.main(root)
>         if _globals.refresh=="yes":
>                 populatelist()   <----------------------- calling function
>                 above.



From ivoras at _-_fer.hr  Sun Apr 24 18:22:34 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Mon, 25 Apr 2005 00:22:34 +0200
Subject: Getting into Python, comming from Perl.
In-Reply-To: <mailman.2411.1114366231.1799.python-list@python.org>
References: <426BDDB7.8010403@amplitudenet.pt>
	<mailman.2411.1114366231.1799.python-list@python.org>
Message-ID: <d4h681$paf$1@bagan.srce.hr>

Mage wrote:

> foo = dict()

or:

foo = {}


From rbt at athop1.ath.vt.edu  Mon Apr 25 09:23:43 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 25 Apr 2005 09:23:43 -0400
Subject: Python, Perl & PDF files
Message-ID: <d4ir0v$fed$1@solaris.cc.vt.edu>

Are there any plans in the near future to support PDF files in Python as 
    thoroughly and completely as Perl does?

http://cpan.uwinnipeg.ca/search?query=pdf&mode=dist

I love Python's clean syntax and ease of use, etc. But on some things 
(PDF for example) as barbaric as Perl's syntax is, it does outshine 
Python... I hate having to use Perl just to deal with PDF files. What do 
others do???


From fredrik at pythonware.com  Mon Apr 11 03:18:34 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 09:18:34 +0200
Subject: Cleaning up after C module
References: <1113201691.215996.129930@f14g2000cwb.googlegroups.com>
Message-ID: <d3d86u$n8l$1@sea.gmane.org>

<j1k1cki at hotmail.com> wrote:

> I have a Python module written in C that spawns and kills processes
> using OS-specific mechanisms. I want to kill all spawned processes when
> the interpreter exits. I tried to wrap every spawned process in a
> Python object like this:
>
>    import cmodule
>    class Process:
>        __init__(self, execname): self.pid = cmodule.spawn(execname)
>        __del__(self): cmodule.kill(self.pid)
>
>    p = Process("foo")
>
> but this does not work, I am getting and exception inidicating that
> 'cmodule' is 'None' in '__del__()'.

module-level names may be cleaned away before your objects, so if you want
to make sure you can reach a module-level object, create your own binding:

    def__del__(self, cmodule=cmodule): cmodule.kill(self.pid)

> Moreover, the Language Reference states that "It is not guaranteed that
> __del__() methods are called for objects that still exist when the
> interpreter exits", so it looks like this approach is wrong anyway. How
> do I do this right?

the "atexit" module might be what you need.

</F> 





From lucio.torre at gmail.com  Tue Apr 19 11:03:15 2005
From: lucio.torre at gmail.com (Lucio Torre)
Date: 19 Apr 2005 08:03:15 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <pan.2005.04.18.18.35.12.343452@free.fr>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<pan.2005.04.18.18.35.12.343452@free.fr>
Message-ID: <1113922995.033230.159220@f14g2000cwb.googlegroups.com>


Fraca7 wrote:
> On Fri, 15 Apr 2005 16:40:05 -0700, lucio.torre at gmail.com wrote:
>
> > So, ive made an initial release that has no documentation on how to
use
> > it or compile it (it requires codewarrior). If there is any
interest on
> > this, please let me know so we can work on getting this as a real
port.
>
> I'm a beginner at PalmOS programming (actually, I've read a book
about it,
> and that's it) but I'd be glad to help...

Do you have any experience on PODS? The whole thing is based on
Codewarrior and Codewarrior for palm is dead.

Lucio.



From sidharth.kuruvila at gmail.com  Mon Apr 18 09:09:10 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Mon, 18 Apr 2005 18:39:10 +0530
Subject: Strings and Lists
In-Reply-To: <d769864e.0504180342.426357d3@posting.google.com>
References: <d769864e.0504180342.426357d3@posting.google.com>
Message-ID: <2ab2ed550504180609854f9d5@mail.gmail.com>

Hi,
   I not sure what sorts of operations you plan to do. But if you
intend to use fixed length arrays or even carrying out repetetive
operations. You should probably look at numeric
http://numeric.scipy.org/


On 18 Apr 2005 04:42:17 -0700, Tom Longridge <tomlongridge at gmail.com> wrote:
> My current Python project involves lots repeatating code blocks,
> mainly centred around a binary string of data. It's a genetic
> algorithm in which there are lots of strings (the chromosomes) which
> get mixed, mutated and compared a lot.
> 
> Given Python's great list processing abilities and the relative
> inefficiencies some string operations, I was considering using a list
> of True and False values rather than a binary string.
> 
> I somehow doubt there would be a clear-cut answer to this, but from
> this description, does anyone have any reason to think that one way
> would be much more efficient than the other? (I realise the best way
> would be to do both and `timeit` to see which is faster, but it's a
> sizeable program and if anybody considers it a no-brainer I'd much
> rather know now!)
> 
> Any advice would be gladly recieved.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From anthonyjhcnospam at netscape.net  Sun Apr 10 00:36:06 2005
From: anthonyjhcnospam at netscape.net (Anthony)
Date: 9 Apr 2005 21:36:06 -0700
Subject: =?iso-8859-1?q?THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
 =?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
 =?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
 =?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
 =?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
 =?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
 =?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
 =?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60_?=
 =?iso-8859-1?q?=28new?=
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
	<1113074212.618866.24620@f14g2000cwb.googlegroups.com>
	<2hW5e.31873$hU7.19808@newssvr33.news.prodigy.com>
Message-ID: <9dd7f022.0504092036.51bd14ca@posting.google.com>

I thought 'The Greatest News Ever' might mean something serious like
transfer of the classic Beatles albums to SACD.
But no, it's just religious crap. Now that the Pope's dead, do you
think we could declare christianity officially extinct? Please?


From martin at v.loewis.de  Thu Apr 28 17:53:02 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 28 Apr 2005 23:53:02 +0200
Subject: unicode encoding problem
In-Reply-To: <1114723563.553068.115410@z14g2000cwz.googlegroups.com>
References: <1114723563.553068.115410@z14g2000cwz.googlegroups.com>
Message-ID: <42715b3e$0$3362$9b622d9e@news.freenet.de>

garykpdx at hotmail.com wrote:
> So how do I tell what encoding my unicode string is in, and how do I
> retrieve that when I read it from a file?

In interactive mode, you best avoid non-ASCII characters in a Unicode
literal.

In theory, Python should look at sys.stdin.encoding when processing
the interactive source. In practice, various Python releases ignore
sys.stdin.encoding, and just assume it is Latin-1. What is
sys.stdin.encoding on your system?

Regards,
Martin


From danielpm72 at yahoo.es  Tue Apr  5 04:32:01 2005
From: danielpm72 at yahoo.es (danielpm72)
Date: Tue, 05 Apr 2005 08:32:01 -0000
Subject: How to read a wxTreeCtrl
Message-ID: <d2tie1+je2h@eGroups.com>


Hi,

I want to read a wxTreeCtrl from the root since I want to store all 
the information in it in a python dictionary. I know that the methods 
I have to use are ItemHasChildren, GetFirstChild and GetNextChild and 
I have been success in getting the first node in this manner:

 while child.IsOk():
            print wx.TreeCtrl.GetItemText ( self, child )  
            if wx.TreeCtrl.ItemHasChildren ( self, child ):
                (child, cookie) = wx.TreeCtrl.GetNextChild( self,    
child, cookie )
            else:
                (child, cookie) = wx.TreeCtrl.GetNextChild( self, 
child, cookie )

my problem is that each one of this nodes has others children whose 
has its values. How can I read more that one level? 

Thanks in advance,


Daniel del Pozo







From beyer at imb-jena.de  Fri Apr  1 14:09:35 2005
From: beyer at imb-jena.de (Andreas Beyer)
Date: Fri, 01 Apr 2005 11:09:35 -0800
Subject: string goes away
In-Reply-To: <16972.49639.890702.835036@montanaro.dyndns.org>
References: <424CCED4.60000@imb-jena.de>
	<16972.46839.309827.574430@montanaro.dyndns.org>
	<424CD55D.8000506@imb-jena.de>
	<16972.49639.890702.835036@montanaro.dyndns.org>
Message-ID: <424D9C6F.2080702@imb-jena.de>

OK, you won. I read in an (regretably old) guidline for improving 
Python's performance that you should prefer map() compared to list 
comprehensions. Apparently the performance of list comprehensions has 
improved a lot, which is great. (Or the overhead of calling map() got 
too big, but I hope this is not the case.)  So, what is the purpose of 
map()? Should it too be deprecated?

Andreas

Skip Montanaro wrote:

>    Andreas> Yeeh, I was expecting something like that. The only reason to
>    Andreas> use map() at all is for improving the performance.  That is
>    Andreas> lost when using list comprehensions (as far as I know). So,
>    Andreas> this is *no* option for larger jobs.
>
>Did you test your hypothesis?
>
>    % python -m timeit -s 'lst = ("abc"*10).split() ; import string' 'map(string.upper, lst)'
>    100000 loops, best of 3: 9.24 usec per loop
>    % python -m timeit -s 'lst = ("abc"*10).split()' '[s.upper() for s in lst]'
>    100000 loops, best of 3: 4.18 usec per loop
>    % python -m timeit -s 'lst = ("abc"*100).split() ; import string' 'map(string.upper, lst)'
>    100000 loops, best of 3: 16.1 usec per loop
>    % python -m timeit -s 'lst = ("abc"*100).split()' '[s.upper() for s in lst]'
>    100000 loops, best of 3: 10.8 usec per loop
>    % python -m timeit -s 'lst = ("abc"*1000).split() ; import string' 'map(string.upper, lst)'
>    10000 loops, best of 3: 72.7 usec per loop
>    % python -m timeit -s 'lst = ("abc"*1000).split()' '[s.upper() for s in lst]'
>    10000 loops, best of 3: 67.7 usec per loop
>    % python -m timeit -s 'lst = ("abc"*10000).split() ; import string' 'map(string.upper, lst)'
>    1000 loops, best of 3: 844 usec per loop
>    % python -m timeit -s 'lst = ("abc"*10000).split()' '[s.upper() for s in lst]'
>    1000 loops, best of 3: 828 usec per loop
>
>    % python -m timeit -s 'lst = ["abc"*10]*10 ; import string' 'map(string.upper, lst)'
>    10000 loops, best of 3: 42.7 usec per loop
>    % python -m timeit -s 'lst = ["abc"*10]*10' '[s.upper() for s in lst]'
>    10000 loops, best of 3: 26.5 usec per loop
>    % python -m timeit -s 'lst = ["abc"*10]*100 ; import string' 'map(string.upper, lst)'
>    1000 loops, best of 3: 376 usec per loop
>    % python -m timeit -s 'lst = ["abc"*10]*100' '[s.upper() for s in lst]'
>    1000 loops, best of 3: 230 usec per loop
>    % python -m timeit -s 'lst = ["abc"*10]*1000 ; import string' 'map(string.upper, lst)'
>    100 loops, best of 3: 3.72 msec per loop
>    % python -m timeit -s 'lst = ["abc"*10]*1000' '[s.upper() for s in lst]'
>    100 loops, best of 3: 2.23 msec per loop
>
>The above results are using Python CVS (aka 2.5a0).
>
>Skip
>
>  
>



From steve at holdenweb.com  Thu Apr  7 15:40:24 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 07 Apr 2005 15:40:24 -0400
Subject: How to name Exceptions that aren't Errors
In-Reply-To: <3blfl8F6gt80jU1@individual.net>
References: <3blfl8F6gt80jU1@individual.net>
Message-ID: <d3426i$se$1@sea.gmane.org>

Leo Breebaart wrote:
> I've recently become rather fond of using Exceptions in Python to
> signal special conditions that aren't errors, but which I feel
> are better communicated up the call stack via the exception
> mechanism than via e.g. return values.
> 
Absolutely.

> For instance, I'm thinking of methods such as:
> 
> 
>     def run(self):
>     """ Feed the input file to the simulator. """
> 
>         for linenr, line in enumerate(self.infile):
>             try:
>                 current_values = self.parse_line(linenr, line)
> ==>         except CommentLineException:
>                 continue
>             results = self.do_one_simulation_step(current_values)
>             self.process_simulation_results(results)
> 
> 
> which I use in order to discard comments from a file I'm parsing
> line-by-line.
> 
This specific example assumes that it isn't possible to easily determine 
by examination that the line is a comment, otherwise it's more readably 
re-cast as

         for linenr, line in enumerate(self.infile):
             if not isComment(line):
                 current_values = self.parse_line(linenr, line)
                 results = self.do_one_simulation_step(current_values)
                 self.process_simulation_results(results)

but the general point is still a valid one, so I'll assume you just 
grabbed something that was readily to hand.

> My question is twofold. First, I know that many programmers are
> violently opposed to using exceptions in this fashion, i.e. for
> anything other than, well, exceptional circumstances. But am I
> correct in thinking that in Python this usage is actually
> considered quite normal, and not frowned upon? Is my snippet
> above indeed sufficiently Pythonic?
> 
Well, you will doubtless get as many opinions as you consult 
programmers, but in general there's much more tolerance in the Python 
world for such programming methods, and indeed much more tolerance 
generally than in some communities I've been a part of.

> Second, purely as a question of aesthetics, I was wondering if
> the folks here might have any opinions about actual naming
> conventions for the exception classes used in this fashion.
> 
> 'CommentLineError' would clearly be wrong, but using the
> 'Exception' prefix seems a bit redundant and pointless too. I
> suppose I could just call the exception "CommentLine" and leave
> it at that, but I don't know, maybe there's something better I'm
> overlooking.
> 
Here you could be guided by the standard hierarchy, quoted here from the 
2.4 documentation:

     Exception
      +-- SystemExit
      +-- StopIteration
      +-- StandardError
      |    +-- KeyboardInterrupt
      |    +-- ImportError
      |    +-- EnvironmentError
      |    |    +-- IOError
      |    |    +-- OSError
      |    |         +-- WindowsError
      |    +-- EOFError
      |    +-- RuntimeError
      |    |    +-- NotImplementedError
      |    +-- NameError
      |    |    +-- UnboundLocalError
      |    +-- AttributeError
      |    +-- SyntaxError
      |    |    +-- IndentationError
      |    |         +-- TabError
      |    +-- TypeError
      |    +-- AssertionError
      |    +-- LookupError
      |    |    +-- IndexError
      |    |    +-- KeyError
      |    +-- ArithmeticError
      |    |    +-- OverflowError
      |    |    +-- ZeroDivisionError
      |    |    +-- FloatingPointError
      |    +-- ValueError
      |    |    +-- UnicodeError
      |    |        +-- UnicodeEncodeError
      |    |        +-- UnicodeDecodeError
      |    |        +-- UnicodeTranslateError
      |    +-- ReferenceError
      |    +-- SystemError
      |    +-- MemoryError
      +---Warning
	  +-- UserWarning
	  +-- DeprecationWarning
	  +-- PendingDeprecationWarning
	  +-- SyntaxWarning
	  +-- OverflowWarning (not generated in 2.4; won't exist in 2.5)
	  +-- RuntimeWarning
	  +-- FutureWarning

> Any suggestions?
> 
Obviously *Error and *Warning predominate, but I would suggest it's 
largely a matter of code readability. I've even used an exception called 
Continue to overcome an irksome restriction in the language (you used 
not to be able to continue a loop from an except clause).

As long as the intent of the code is obvious to the casual reader I 
suspect it's very unlikely you'll get complaints.

     except CommentLine:
         pass

seems reasonably comprehensible, so time spent arguing about it would be 
better devoted to a discussion of the number of angels that could dance 
on the head of a pin.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From firstname.lastname at iki.fi-spam  Sat Apr  2 12:51:41 2005
From: firstname.lastname at iki.fi-spam (Simo Melenius)
Date: 02 Apr 2005 20:51:41 +0300
Subject: How To Do It Faster?!?
References: <mailman.1233.1112444897.1799.python-list@python.org>
Message-ID: <87oecxf4nm.fsf@sme.intra.citec.fi>

andrea_gavana at tin.it writes:

> >$ find . -type f -printf "%T@ %u %s %p\n" > /yourserverroot/files.txt
> That is a nice idea. I don't know very much about Unix, but I suppose that
> on a ksh I can run this command (or a similar one) in order to obtain the
> list I need. If anyone knows if that command will run also on a simple ksh,
> could please confirm that?

That depends on the unix flavor you're using -- my example was for GNU
utilities which are heavily used on (probably all) Linux systems.
BSDs, Solaris and other unixen have slightly different 'find' syntax.
Use "man find" to find out more about how 'find' works on your system.

On all systems I know, it goes like:

find <directory> [-switches ...]

where the switches vary depending on the system. In my example, I used
-type f (f as in file) to only list files (otherwise 'find' will
include directories too in the output) and -printf to include desired
data -- in this case, owner, last modified time, size, path -- in the
output (otherwise 'find' will only print the path).

You should at least go through the -printf formatting codes to see
what information you're able to include in the output (=> man find).

I used %T@ to print the last modified time in Unix time because it's
as simple as it can be: an integer, counting the number of seconds
since Jan 1 1970. Python's "time" module groks Unix time just like
that.

> Moreover, I could run this script in a while loop, like:

Except that, I'd imagine, constantly traversing the filesystem will
seriously degrade the performance of the file server. You want to run
your script periodically over a day, maybe at times when the server is
inactive. Or hourly between 8am-4pm and then once at night.

In Unix, there's a facility called cron to do just that, it runs
scripts and commands over and over again hourly, daily, weekly, or
just whenever you want it. Consult your unix flavor's manual or
newsgroup on that.

>         copy /yourserverroot/files.txt   /yourserverroot/filesbackup.txt
> always have the filesbackup.txt up-to-date, as a function of the "find"
> speed on the server.

Yes, creating a temporary file is a good approach. I'd suggest moving
the new list over the old one (mv tmpfile filelist.txt) instead of
copying, since usually move is merely a rename operation on the
filesystem and doesn't involve actually copying of any data.


br,
S

-- 
firstname.lastname at iki.fi-spam


From narshe at gmail.com  Thu Apr 14 20:22:13 2005
From: narshe at gmail.com (Josh Close)
Date: Thu, 14 Apr 2005 19:22:13 -0500
Subject: Announcement: AsyncSocket module
Message-ID: <4a0cafe20504141722538b9bf@mail.gmail.com>

I wrote an asynchronous socket module because asyncore and asynchat
didn't quite fit my needs. AsyncSocket has support for connection and
read/write timeouts. It is currently only supported in linux.

It's been stable for me in all my uses so far. I'd like people to give
it a try and let me know what they think, and any bugs that are found.

https://sourceforge.net/projects/asyncsocket/

Thanks.

-Josh


From lbates at syscononline.com  Mon Apr 18 11:09:48 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 18 Apr 2005 10:09:48 -0500
Subject: accesing pages (or ranges of pages) via Reportlab
In-Reply-To: <pan.2005.04.18.14.20.35.385426@presidency.com>
References: <pan.2005.04.18.14.20.35.385426@presidency.com>
Message-ID: <4263CDBC.4020507@syscononline.com>

ReportLab doesn't support this in the free version but they sell
an add-on called PageCatcher that has this feature.  I've used
it on a couple of projects and it works EXTREMELY well.

-Larry


Rajarshi Guha wrote:
> Hi, I've been using pdflatex to dump ranges of pages from a PDF file via
> Python. However, I was looking at the Reportlab toolkit and was wondering
> if this operation would be possible using this toolkit as well.
> 
> Admittedly, I have'nt read the documentation in detail, but I was
> wondering if anybody could provide any pointers to extracting pages from a
> PDF via Python without using pdflatex
> 
> Thanks,
> Rajarshi
> 


From mwm at mired.org  Tue Apr 26 03:55:39 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 02:55:39 -0500
Subject: create python process
References: <1114493653.057561.96260@o13g2000cwo.googlegroups.com>
Message-ID: <86mzrmm0p0.fsf@guru.mired.org>

"ajikoe at gmail.com" <ajikoe at gmail.com> writes:

> Hello,
>
> I would like to create python processes instead of thread.
> Can anyone give me an example or site which shows a tutorial about how
> to create processes ?

See the os.fork documentation.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From eurleif at ecritters.biz  Sat Apr 23 18:40:09 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 23 Apr 2005 22:40:09 GMT
Subject: Python or PHP?
In-Reply-To: <Xns9641ADB7FB268castleamber@130.133.1.4>
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
Message-ID: <d9Aae.2046$Cz3.269988@monger.newsread.com>

John Bokma wrote:
> Not. Perl and Java use similar methods where one can specify place holders, 
> and pass on the data unescaped. But still injection is possible.

How?


From mahs at telcopartners.com  Thu Apr 21 22:21:05 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 21 Apr 2005 19:21:05 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <d49g4a$onn$1@sea.gmane.org>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>	<1114122554.228545.105700@g14g2000cwa.googlegroups.com>
	<d49g4a$onn$1@sea.gmane.org>
Message-ID: <d49mpa$90v$1@sea.gmane.org>

Michael Spencer wrote:
> http://www.python.org/doc/2.3.3/lib/module-copy.html
> deepcopy:
> ...
> This version does not copy types like module, class, function, method, 
> stack trace, stack frame, file, socket, window, *array*, or any similar 
> types.
> ...
> 
On reflection, I realize that this says that the array type is not 
deep-copyable, not array instances.  Still, it does appear that array instances 
don't play nicely with deepcopy

It appears that if you want to deepcopy an object that may contain arrays, 
you're going to have to 'roll your own' deep copier.  Something like this would 
do it:

class Test1(object):

     def __init__(self, **items):
         self.items = items

     def __deepcopy__(self, memo={}):
         mycls = self.__class__
         newTestObj = mycls.__new__(mycls)
         memo[id(self)] = newTestObj

         # We need a deep copy of a dictionary, that may contain
         # items that cannot be deep copied.  The following code
         # emulates copy._deepcopy_dict, so it should act the same
         # way as deepcopy does.

         x = self.items
         y = {}
         memo[id(x)] = y
         for key, value in x.iteritems():
             try:
                 newkey = deepcopy(key, memo)
             except TypeError:
                 newkey = copy(key)
             try:
                 newvalue = deepcopy(value, memo)
             except TypeError:
                 newvalue = copy(value)
             y[newkey] = newvalue

         newTestObj.__init__(**y)
         return newTestObj

     def __repr__(self):
         return '%s object at %s: %s' % (self.__class__.__name__
                                     , hex(id(self)), self.items)

  >>> t = Test1(a=array("d",[1,2,3]))
  >>> t
  Test1 object at 0x196c7f0: {'a': array('d', [1.0, 2.0, 3.0])}
  >>> t1 = deepcopy(t)
  >>> t1
  Test1 object at 0x1b36b50: {'a': array('d', [1.0, 2.0, 3.0])}
  >>>

BTW: are you sure you really need to copy those arrays?

Michael



From chirayu at chirayuk.com  Sun Apr  3 16:12:46 2005
From: chirayu at chirayuk.com (Chirayu Krishnappa)
Date: Sun, 3 Apr 2005 13:12:46 -0700
Subject: Corectly convert from  %PATH%=c:\\X; "c:\\a;
	b"  TO  ['c:\\X', 'c:\\a; b']
In-Reply-To: <20050403150134.GA3398@unpythonic.net>
Message-ID: <20050403201251.032811E4003@bag.python.org>

My goal is to check for certain paths appearing in the current PATH (set by
a bunch of scripts run in some random order) and (1) rearrange some of them
so that they are in the "correct" order and (2) replace some for which I
have preferred alternatives.

The quote processing I saw cmd.exe do was discovered when I tried
C:\temp>dir \Pro<TAB>
C:\temp>dir "\Program Files"
C:\temp>dir "\Program Files"\vim

...and it worked. That's when I placed something in c:\temp\a;b\c and set
path to begin with c:\temp"\a;b"\c;%path% and realized that cmd.exe picks it
up from there. (You can have more than 2 quotes in the path too.)

However, I noticed that

INCLUDE="c:\temp\a;b\c";%INCLUDE%

does not help the vc++ compiler find include files there. (PYTHONSTARTUP
could not find a python file there either.)

So in the end - this behavior is quirky. Google searches (and peeks into
code) suggest that each app has its own logic to process such paths. It
might make more sense to avoid using ;'s in paths.

I have not even tried to see what quirks there exist with unix.

I think I will stick to a simple splitting at the ;. Luckily all the
directories I am dealing with have nice names.

I was thinking that I was doing the wrong thing with the split(';') when I
noticed cmd.exe's behavior and was looking for something which most apps did
(mainly I just wanted to call whatever function python used to process
PATH). For now - its not a big deal.

Thanks for your response,
Chirayu.

-----Original Message-----
From: Jeff Epler [mailto:jepler at unpythonic.net] 
Sent: Sunday, April 03, 2005 8:02 AM
To: chirayuk
Cc: python-list at python.org
Subject: Re: Corectly convert from %PATH%=c:\\X; "c:\\a; b" TO ['c:\\X',
'c:\\a; b']

if your goal is to search for files on a windows-style path environment
variable, maybe you don't want to take this approach, but instead wrap
and use the _wsearchenv or _searchenv C library functions
 
http://msdn.microsoft.com/library/en-us/vclib/html/_crt__searchenv.2c_._wsea
rchenv.asp

Incidentally, I peeked at the implementation of _searchenv in wine (an
implementation of the win32 API for Unix), and it doesn't do the
quote-processing that you say Windows does.  The msdn page doesn't give
the syntax for the variable either, which is pretty typical.  Do you
have an "official" page that discusses the syntax?

Jeff



From martin at v.loewis.de  Tue Apr  5 16:14:49 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 05 Apr 2005 22:14:49 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
In-Reply-To: <mailman.1393.1112715195.1799.python-list@python.org>
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com><mailman.1280.1112603141.1799.python-list@python.org>	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net><mailman.1299.1112626394.1799.python-list@python.org>	<4251d375$0$23625$9b622d9e@news.freenet.de>
	<mailman.1393.1112715195.1799.python-list@python.org>
Message-ID: <4252f1b9$0$21546$9b622d9e@news.freenet.de>

Fredrik Lundh wrote:
  > have you used exemaker?  have you compared the behaviour of the
> resulting executables to batch files using different environments, shells,
> and OS versions?  or are you just guessing here?

I have invoked it once, but that was some time ago, and I did not do a 
full case study of all its capabilities. In particular, I don't use
different environments, shells, or OS versions, so I cannot compare
the behaviour of the executables under circumstances different from
the ones on my machine(s). For the use cases that I guessed that the
OP was referring to, a batch file should be sufficient (actually,
the OP clarified that a "py23.bat" batch file was sufficient for
his needs).

Regards,
Martin


From steve at holdenweb.com  Sat Apr  2 00:55:23 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 02 Apr 2005 00:55:23 -0500
Subject: that is it is not it (logic in Python)
In-Reply-To: <424dd3fb$0$19147$636a15ce@news.free.fr>
References: <424d0be1$0$2882$626a14ce@news.free.fr>	<mailman.1199.1112380840.1799.python-list@python.org>	<424dc4b4$0$18707$636a15ce@news.free.fr>	<pan.2005.04.01.22.42.30.441348@jerf.org>
	<424dd3fb$0$19147$636a15ce@news.free.fr>
Message-ID: <d2lc18$v8c$1@sea.gmane.org>

F. Petitjean wrote:
[...]
> 
> *I* wrote the original post.  and am pretty sure it is not faked. And I
> run it before posting to be sure not to say anything wrong. it is a kind
> of relief to learn that computers in 2005 (even Python powered) are
> humor-impaired and follow the ? ref manual ? every time even on first
> April.
> 
But you also wrote in your original post:

> Seriously on an April fool's day.

which would seem to be falsely denying that your post was an April 
Fool's prank. Rather bad form, old chap ;-)

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From tim.golden at viacom-outdoor.co.uk  Tue Apr 19 11:34:51 2005
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 19 Apr 2005 16:34:51 +0100
Subject: Name/ID of removable Media: how?
Message-ID: <9A28C052FF32734DACB0A288A3533991EBB78E@vogbs009.gb.vo.local>

[Ivan Van Laningham]
| Hi All--
| Tim's wmi stuff looked interesting, so I tried it out, and 
| now I have a
| question.
| 

[... snip code ...]

| The output from the above script (drive d contains cd) is:
| 
| WMI serial D0ADBEE7 3501047527
| 
| win32api serial -793919769 -793919769
| 
| 
| What's the difference between the two serial numbers?  


Try this: hex (-793919769)

You might need to check back on recent discussions here re
negative / positive numbers and hexadecimal.

(Short version: we used to treat hex numbers with the top bit
set as negative decimal numbers; now only negative hex numbers
are negative decimals)

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From peter at engcorp.com  Tue Apr 12 14:17:31 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 12 Apr 2005 14:17:31 -0400
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <mailman.1783.1113328850.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com><F4CdnYojx8MiN8bfRVn-2w@comcast.com>	<FKydnWjMkrRTaMbfRVn-3g@powergate.ca>
	<mailman.1783.1113328850.1799.python-list@python.org>
Message-ID: <QOudnUX2BtwhjcHfRVn-ug@powergate.ca>

Fredrik Lundh wrote:
> Peter Hansen wrote:
>>Joe Smith wrote:
>>
>>>Xah Lee wrote:
>>>
>>>>of motherf***ing irrevalent drivel?
>>>
>>>I am greatly amused.
>>>A troll impersonating Xah Lee has made xah look like a total moron.
>>>LOL
>>
>>Sorry, Joe, but why do you think this wasn't Xah?
> 
> why do you think "Joe" and "Xah" are two different persons? ;-)

Because Joe writes properly, and concisely. ;-)


From jason.mobarak at gmail.com  Wed Apr 27 19:48:19 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 27 Apr 2005 16:48:19 -0700
Subject: Lexicographical sort for numarray
In-Reply-To: <mailman.2602.1114637826.1799.python-list@python.org>
References: <uOSdnUooRt4OufLfRVn-sg@comcast.com>
	<1114635125.849049.309880@l41g2000cwc.googlegroups.com>
	<mailman.2601.1114635965.1799.python-list@python.org>
	<1114636258.399427.181330@f14g2000cwb.googlegroups.com>
	<mailman.2602.1114637826.1799.python-list@python.org>
Message-ID: <1114645699.774002.34250@o13g2000cwo.googlegroups.com>

Ah, okay, I didn't remember correctly what arr.tolist did. My mistake.



From correiajREMOVECAPS at hotmail.com  Tue Apr  5 20:11:47 2005
From: correiajREMOVECAPS at hotmail.com (J Correia)
Date: Wed, 06 Apr 2005 00:11:47 GMT
Subject: How to get rid of FutureWarning: hex/oct constants...
References: <1146is3kgedf575@corp.supernews.com>
	<mailman.842.1111709499.1799.python-list@python.org>
	<1146m2p2k4b53c1@corp.supernews.com>
	<rKSdnSnRPZqxxt7fRVn-ug@powergate.ca>
Message-ID: <7PF4e.3431$jR3.1862@edtnps84>

Assuming you're just trying to get rid of the message each time the program
runs, the following suppresses it:

import warnings
warnings.filterwarnings('ignore', category=FutureWarning)


HTH,




From prabapython at yahoo.co.in  Mon Apr 11 00:50:11 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Mon, 11 Apr 2005 05:50:11 +0100 (BST)
Subject: Doubt regarding sorting functions
In-Reply-To: 6667
Message-ID: <20050411045012.18146.qmail@web8406.mail.in.yahoo.com>

Dear All,

          I am new to Python.  I am in need of
some sorting functions (eg) numerical sorting
functions and alphapetical sorting functions. 
I have searched through net But I cannot
find any regarding this so If anyone know
regarding this. Kindly mail me as early as possible

with regards
PRabahr

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From larsmtl at yahoo.com  Fri Apr 22 11:23:22 2005
From: larsmtl at yahoo.com (larsmtl at yahoo.com)
Date: 22 Apr 2005 08:23:22 -0700
Subject: Python CGI Select Multiple Returning all items in box
In-Reply-To: <o00h6197bkl1tfferhruu0i8du6fkov4o9@4ax.com>
References: <1114115387.081363.109450@o13g2000cwo.googlegroups.com>
	<o00h6197bkl1tfferhruu0i8du6fkov4o9@4ax.com>
Message-ID: <1114183402.091406.122140@g14g2000cwa.googlegroups.com>

Sorry, I should have explained better.  I'm using the "listbox" as a
repository.  With some Javascript, the user dumps items into it and
then hits the submit.  It's similar to what you see here:
http://www.mredkj.com/tutorials/tutorial_mixed2b.html



From cesarbs at gmail.com  Sat Apr  9 18:37:21 2005
From: cesarbs at gmail.com (=?ISO-8859-1?Q?C=E9sar_Leonardo_Blum_Silveira?=)
Date: Sat, 9 Apr 2005 19:37:21 -0300
Subject: How to detect if file is a directory
In-Reply-To: <3bqmofF6di925U1@individual.net>
References: <mailman.1627.1113072050.1799.python-list@python.org>
	<3bqmofF6di925U1@individual.net>
Message-ID: <e724b244050409153755b6369c@mail.gmail.com>

Thanks :-)

On Apr 9, 2005 3:55 PM, Tim Jarman <tmj at spamlessjarmania.com> wrote:
> C?sar Leonardo Blum Silveira wrote:
> 
> > Hello all, I'm new to this list.
> >
> > How can I detect if a file is a directory or not?
> >
> > Thanks
> >
> > C?sar
> 
> The os module contains many helpful tools for working with files,
> directories, links and so forth. Check out the docs and marvel. The
> following snippet answers your specific question:
> 
> <code>
> import os.path
> 
> if os.path.isdir("/some/path/here"):
>     print "It's a directory!"
> </code>
> --
> Website: www DOT jarmania FULLSTOP com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From sidharth.kuruvila at gmail.com  Wed Apr  6 23:29:54 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Thu, 7 Apr 2005 08:59:54 +0530
Subject: how can I extract all urls in a string by using re.findall() ?
In-Reply-To: <311b5ce105040619052e00e10c@mail.gmail.com>
References: <311b5ce105040619052e00e10c@mail.gmail.com>
Message-ID: <2ab2ed55050406202960cc1382@mail.gmail.com>

Reading the documentation on re might be helpfull here :-P

findall returns a tuple of all the groups in each match.

You might find finditer usefull.

for m in re.finditer(url, html) :
    print m.group()

or you could replace all your paranthesis with the non-grouping
version. That is, all brackets (...) with (?:...)


On Apr 7, 2005 7:35 AM, could ildg <could.net at gmail.com> wrote:
> I want to retrieve all urls in a string. When I use re.fiandall, I get
> a list of tuples.
> My code is like below:
> 
> [code]
> url=unicode(r"((http|ftp)://)?(((([\d]+\.)+){3}[\d]+(/[\w./]+)?)|([a-z]\w*((\.\w+)+){2,})([/][\w.~]*)*)")
> m=re.findall(url,html)
> for i in m:
>    print i
> [/code]
> 
> html is a variable of string type which contains many urls in it.
> the code will print many tuples, and each tuple seems not to represent
> a url. e.g, one of them is as below:
> 
> (u'http://', u'http', u'image.zhongsou.com/image/netchina.gif', u'',
> u'', u'', u'', u'image.zhongsou.com', u'.com', u'.com',
> u'/netchina.gif')
> 
> Why is there two "http" in it? and why are there so many ampty strings
> in the tupe above? It's obviously not a url. How can I get the urls
> correctly?
> 
> Thanks in advance.
> --
> ????????????????????
> ????????????????
> ????????
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From rune.froysa at usit.uio.no  Tue Apr 19 08:33:20 2005
From: rune.froysa at usit.uio.no (Rune Froysa)
Date: Tue, 19 Apr 2005 14:33:20 +0200
Subject: xmlrpclib and binary data as normal parameter strings
Message-ID: <svlacnvhrov.fsf@dresden.uio.no>

Trying something like::
  import xmlrpclib
  svr = xmlrpclib.Server("http://127.0.0.1:8000")
  svr.test("\x1btest")

Failes on the server with::
  xml.parsers.expat.ExpatError: not well-formed (invalid token)

(Smaller test-case: xmlrpclib.loads(xmlrpclib.dumps(('\x1btest',))))

Shouldn't this be allowed? 

>From http://www.xmlrpc.com/spec ::
  Any characters are allowed in a string except < and &, which are
  encoded as &lt; and &amp;. A string can be used to encode binary
  data.

>From http://www.w3.org/TR/2004/REC-xml11-20040204/#dt-character ::
  Consequently, XML processors MUST accept any character in the range
  specified for Char
  ...
  Char  ::=  [#x1-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]

(I'm aware that xmlrpclib.Binary can be used as an ugly work-around.)

-- 
Rune Fr?ysa


From juggs at dfgt.com  Thu Apr 21 16:15:34 2005
From: juggs at dfgt.com (ionic)
Date: Thu, 21 Apr 2005 21:15:34 +0100
Subject: New line
Message-ID: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>

Hi all

This is probably going to sound very dull but, how do you get to the next
line after youve finished typing the first line?

Thanks in advance

--

"It's all in fun or life isn't worth it!"





From sjmachin at lexicon.net  Wed Apr  6 21:11:05 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 07 Apr 2005 11:11:05 +1000
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
Message-ID: <6p1951pop1pfh3j57r7gg568cn3bo4c7lg@4ax.com>

On 6 Apr 2005 15:30:41 -0700, "RickMuller" <rpmuller at gmail.com> wrote:

>I have to sort a list, but in addition to the sorting, I need to
>compute a phase factor that is +1 if there is an even number of
>interchanges in the sort, and -1 if there is an odd number of
>interchanges.
>
>I could write a bubble sort, count the number of interchanges, and
>compute the factor, but I have a feeling that there some
>decorate-sort-undecorate solution buried in this problem somewhere.
>However, I can't see it. Can anyone else help me with this?
>

1. What is an "interchange"?

2. Without a definition that refers only to to the input and output,
one would have to say that "interchange" implies "event" and so the
number of interchanges would depend on the sorting method.

3. Of what practical use (or even esoteric academic interest) is the
parity of the number of interchanges?





From Sebastien.Boisgerault at gmail.com  Tue Apr 19 05:05:11 2005
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 19 Apr 2005 02:05:11 -0700
Subject: fpectl
In-Reply-To: <mailman.2071.1113869781.1799.python-list@python.org>
References: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
	<mailman.2071.1113869781.1799.python-list@python.org>
Message-ID: <1113900597.167410.91470@z14g2000cwz.googlegroups.com>

Thanks for this answer.

Did you forward this info to python-dev ?

Cheers,

SB



From johnandsarah at estragon.freeserve.co.uk  Thu Apr  7 17:42:30 2005
From: johnandsarah at estragon.freeserve.co.uk (John Perks and Sarah Mount)
Date: Thu, 7 Apr 2005 22:42:30 +0100
Subject: dynamic loading of code,
	and avoiding package/module name collisions.
Message-ID: <d349ef$scn$1@newsg2.svr.pol.co.uk>

Long story short: what I'm looking for is information on how have a Python
app that:
* embeds an editor (or wxNoteBook full of editors)
* loads code from the editors' text pane into the app
* executes bits of it
* then later unloads to make way for an edited version of the code.
The new version needs to operate on a blank slate, so reload() may not be
appropriate.

One of the reasons I am asking is that I am writing a simulator, where the
behaviour of the objects is written in Python by the user (with callbacks
into the simulator's API to update the display). How should I best go about
this, with respect to loading (and unloading) of user code? It is expected
that each project will take the form of a Python package, with some files
therein having standard names for particular purposes (presumably
__init__.py will be one of these), and the rest being user code and data
files. It is not expected that we restrict the user's package hierarchy to
be only one level deep. Given the name of a package:

How can we be sure it doesn't conflict with a Python package/module name?

What if a new module/package is added (e.g. to site-packages) that has the
same name?

One possibility that occurred to me was having a package
MyAppName.UserProject as part of the app, with the user's project root
package occurring as a subpackage in there, and being reloaded (either via
reload() or a method on imp) each time we re-start the simulation. One
reason for this was to avoid top-level name collisions. Is this a good way
to go about it, and if so, how should users' imports refer between modules
in the same package, and across sub-packages?

Can someone please explain the interaction between the relevant parts of the
imp module (which is presumably what I'll be needing) and: the import lock;
sys.modules; sys.path?

Is removing a module from sys.modules tantamount to uninstalling it? In
particular, will imp.load_module() then create a new one?

When cheking the user's intended filenames for validity as module names, is
the canonical regexp to use
[a-zA-Z_][a-zA-Z0-9_]*, or is it something more subtle?

In general, on deciding on a module file name, how can one be sure that it
doesn't conflict with another package (either standard or third-party)? In
particular, if I have a thing.py file in my local dir, and then Python 2.5
brings out a (possibly undocumented) standard module called thing, how can I
avoid problems with running python from my local dir? (As an experiment, I
put a file called ntpath.py in my local dir, and I couldn't import site.) To
make matters worse, I may be unaware of this Python upgrade if it is done by
the sysadmin. The same applies with new keywords in Python, but this may be
ameliorated by their gradual introduction via __future__.

If all this wasn't complicated enough, at some point we'll want to let the
users write their code in Java as well (though not mixing langauges in one
project; that would make my brain hurt). Can someone point to a resource
that will list the issues we should be aware of from the start? (Googling
just gets references to Jython and jPype, rather than anything than, say, a
list of gotchas).

Thank you

John




From skip at pobox.com  Fri Apr  1 19:49:14 2005
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 1 Apr 2005 18:49:14 -0600
Subject: Looking for Benchmarklets to improve pyvm
In-Reply-To: <424D5BD0.10601@cs.teiath.gr>
References: <424D5BD0.10601@cs.teiath.gr>
Message-ID: <16973.60426.523957.411320@montanaro.dyndns.org>


    Stelios> I'm collecting small testlets to benchmark it, discover
    Stelios> bottlenecks and improve it.  They should be small and not use
    Stelios> any crazy modules.  Only [sys, os, itertools, thread,
    Stelios> threading, math, random] for now.

Take a look around for Marc Andre Lemburg's pybench suite. 

Skip


From simon.brunning at gmail.com  Mon Apr  4 07:30:04 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 4 Apr 2005 12:30:04 +0100
Subject: Sending keytrokes to Windows app
In-Reply-To: <42511F4B.40702@btk.utu.fi>
References: <42511F4B.40702@btk.utu.fi>
Message-ID: <8c7f10c6050404043016ee21ec@mail.gmail.com>

On Apr 4, 2005 12:04 PM, Marten Hedman <marten.hedman at btk.utu.fi> wrote:
> I am trying to control a Windows application from a python script with
> SendKeys and Python 2.3.

WATSUP might be worth a look, instead...

http://www.tizmoi.net/watsup/intro.html

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From aahz at pythoncraft.com  Sat Apr  2 11:29:27 2005
From: aahz at pythoncraft.com (Aahz)
Date: 2 Apr 2005 11:29:27 -0500
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
 Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
Message-ID: <d2mh97$8sj$1@panix2.panix.com>

In article <Vrv3e.133894$dP1.471335 at newsc.telia.net>,
Sunnan  <sunnan at handgranat.org> wrote:
>>> [Aahz]
>>>> 
>>>>"The joy of coding Python should be in seeing short, concise, readable
>>>>classes that express a lot of action in a small amount of clear code --
>>>>not in reams of trivial code that bores the reader to death."  --GvR
>
>It's just that I'm having a hard time matching that quote to what I 
>though python was about. I thought boring code was considered a virtue 
>in python. ("Explicit is better than implicit", "sparse is better than 
>dense".)
>
>Because what is "boring"? The opposite of dense, tense, intense. Utterly 
>predictable; it's like the combination of all my prejudices. Even before 
>I knew, I thought "Bet Python separates statements from expressions".

Note very, VERY, *VERY* carefully that the quote says nothing about
"boring code".  The quote explicitly refers to "reams of trivial code"
as boring -- and that's quite true.  Consider this distinction:

    if foo == 'red':
        print 'foo is red'
    elif foo == 'blue':
        print 'foo is blue'

versus

    print "foo is", foo

I'm sure you can think of many other examples -- real examples -- if you
put your mind to work; Guido's point is about the essential necessity of
refactoring and rewriting code for conciseness and clarity.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From sjmachin at lexicon.net  Wed Apr 13 16:33:05 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 14 Apr 2005 06:33:05 +1000
Subject: preallocate list
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j6p7$ntl$1@scotsman.ed.ac.uk>
Message-ID: <squq51l33q22o6qikeuqu66eunlqa4o5hp@4ax.com>

On Wed, 13 Apr 2005 14:28:51 +0100, Jim <jbo at cannedham.ee.ed.ac.uk>
wrote:

>Thanks for the suggestions. I guess I must ensure that this is my bottle 
>neck.
><code>
>     def readFactorsIntoList(self,filename,numberLoads):

1. "numberLoads" is not used. 

>	factors = []
>         f = open(self.basedir + filename,'r')
>         line = f.readline()
>         tokens = line.split()
>         columns = len(tokens)
>         if int(columns) == number:

2. "columns" is already an int (unless of course you've redefined
"len"!). Doing int(columns) is pointless.
3. What is "number"? Same as "numberLoads"?
4. Please explain in general what is the layout of your file and in
particular, what is the significance of the first line of the file and
of the above "if" test. 

>             for line in f:
>                 factor = []
>                 tokens = line.split()
>                 for i in tokens:
>                     factor.append(float(i))

4. "factor" is built and then not used any more??

>                 factors.append(loadFactor)

5. What is "loadFactor"? Same as "factor"?

>         else:
>             for line  in f:
>                 tokens = line.split()
>                 factors.append([float(tokens[0])] * number)

6. You throw away any tokens in the line after the first??

>	return factors
></code>
>
>OK. I've just tried with 4 lines and the code works.

Which code works? The code you posted? Please define "works".


> With 11000 lines it 
>uses all CPU for at least 30 secs. There must be a better way.

Perhaps after you post the code that you've actually run, and
explained what your file layout is, and what you are trying to
achieve, then we can give you some meaningful help.

Cheers,

John





From Scott.Daniels at Acm.Org  Sat Apr  2 13:21:43 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 02 Apr 2005 10:21:43 -0800
Subject: Can I play too?
In-Reply-To: <87u0mpm8o9.fsf@thomas.local>
References: <mailman.1239.1112456748.1799.python-list@python.org>
	<87u0mpm8o9.fsf@thomas.local>
Message-ID: <424edd84$1@nntp0.pdx.net>

Thomas Rast wrote:
> Tom Carrick <knyght at gmail.com> writes:
>>In my attempted learning of python, I've decided to recode an old
>>anagram solving program I made in C++. The C++ version runs in less
>>than a second, while the python takes 30 seconds.
> 
> Indeed, your program can be improved to run about ten times as fast, ...
> <great stuff>

This problem inspired an "all anagrams" program.  Using it I was able
to find the largest anagram group in Shakespeare's first folio in about
the time you originally found anagrams for an individual word.

  7: owers = rowse = sower = sowre = swore = woers = worse

====

     def words(source):
         for line in source:
             for word in line.split():
                 yield word


     def all_anagrams(words):
         seen = dict()

         for word in words:
             word = word.lower()
             if word not in seen:
                 dorw = ''.join(sorted(word))
                 try:
                     seen[dorw].append(word)
                 except KeyError:
                     seen[dorw] = [word]
                     if word == dorw:
                         continue
                 seen[word] = ()
         for group in seen.itervalues():
             if len(group) > 1:
                 yield -len(group), sorted(group) # conveniently sortable


def main(sources):
     for filename in sources:
         dictionary = open(filename, 'r')
         print "All anagrams from %s:" % filename
         try:
             for nsize, group in sorted(all_anagrams(words(dictionary))):
                 print '%2s: %s' % (-nsize, ' = '.join(group))
         finally:
             dictionary.close()
             print



if __name__ == '__main__':
     import sys
     main(sys.argv[1:] or ['anagrams.py'])


From mauriceling at acm.org  Sun Apr  3 19:36:32 2005
From: mauriceling at acm.org (Maurice LING)
Date: Mon, 04 Apr 2005 09:36:32 +1000
Subject: text analysis in python
In-Reply-To: <mailman.1270.1112566442.1799.python-list@python.org>
References: <mailman.1255.1112523725.1799.python-list@python.org><1325i2-sd2.ln1@lairds.us>	<424FF1CD.2040102@acm.org>
	<mailman.1270.1112566442.1799.python-list@python.org>
Message-ID: <42507E00.1090806@acm.org>

Terry Reedy wrote:

> "Maurice LING" <mauriceling at acm.org> wrote in message 
> news:424FF1CD.2040102 at acm.org...
> 
>>Say I code my  stuffs in Jython (importing java libraries) in a file 
>>"text.py"
> 
> 
> Just to be clear, Jython is not a separate langague that you code *in*, but 
> a separate implementation that you may slightly differently code *for*.
> 
Yes, I do get this point rightly. Jython is just an implementation of 
Python virtual machine using Java. I do note that there are some 
differences, such as, Jython can only handle pure python modules. 
However, I'm not a language expert to differentiate language differences 
between these 2 implementations of Python, as in Jython and CPython. If 
someone care to enlighten, it will be my pleasure to consult. TIA.

> 
>>... Will there be any issues when I try to import text.py into CPython?
> 
> 
> If text.py is written in an appropriate version of Python, it itself will 
> cause no problem.  Hoqwever, when it imports javacode files, as opposed to 
> CPython bytecode files, CPython will choke.
>
In my example, the file "text.py" is coded in Jython, importing Java 
libraries. I do get that I cannot import Java jar files directly into 
CPython. What I do not get is that what is so special about Jython that 
it can "fool" CPython into using Java libraries... or is that there will 
always be a need for Java virtual machine and Python virtual machine 
when I use Java libraries in Jython... and importing Jython coded files 
into CPython....

Cheers
Maurice


From rune.strand at gmail.com  Sat Apr  9 12:39:04 2005
From: rune.strand at gmail.com (runes)
Date: 9 Apr 2005 09:39:04 -0700
Subject: Counting iterations
In-Reply-To: <1112998861.316958.152060@g14g2000cwa.googlegroups.com>
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
Message-ID: <1113064744.144787.315120@o13g2000cwo.googlegroups.com>

You should avoid the "a" + "b" + "c" -kind of concatenation. As strings
at immutable in Python you actually makes copies all the time and it's
slow!

The alternative used in Steven Bethard's example is preferable.



From __peter__ at web.de  Sat Apr 16 02:06:24 2005
From: __peter__ at web.de (Peter Otten)
Date: Sat, 16 Apr 2005 08:06:24 +0200
Subject: Problem when subclass instance changes base class instance
	variable
References: <5108e.6766$MZ2.990611@news20.bellglobal.com>
Message-ID: <d3qa0m$gt6$01$1@news.t-online.com>

Gerry Sutton wrote:

> I have noticed a strange behavior when using a constant identifier to
> initialize an instance list variable in a base class and then trying to
> modifying the list in subclasses by using either the list.extend method or
> even by having the subclass create a whole new list in the variable.
> 
> The following example illustrates the situation.

> Lbase = ['Initial Base Data']

> class BaseClass:
>     def __init__(self):
>         self.data?=?Lbase?????????????????#<----??this?fails??

self.data and Lbase are now bound to the same variable. Consequently changes
to that variable through self.data affect Lbase and vice versa. This is
standard Python behaviour. If you want to use Lbase as a kind of initial
value, modify BaseClass to make a (shallow) copy:

class BaseClass:
    def __init__(self):
        self.data = list(Lbase)

Now every BaseClass instance gets its separate copy. If you have nested
mutables, e. g. a list of lists, look into the copy module for deepcopy().

Peter



From programmer.py at gmail.com  Fri Apr 22 16:37:45 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Fri, 22 Apr 2005 15:37:45 -0500
Subject: figuring out # of bytes
In-Reply-To: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
References: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
Message-ID: <d52c72d2050422133716bada33@mail.gmail.com>

On 22 Apr 2005 13:28:57 -0700, codecraig <codecraig at gmail.com> wrote:
> i want to the number of bytes in a string...
> 
> is, len(x) accurate?
> 
> so, x = "hi"
> len(x) == 2 ....so that means two bytes?
> 
> thanks

No, that means that the string is two bytes in length.  The number of
bytes is dependent on the encoding.  It seems like there was a thread
on this subject recently.

jw


From skip at pobox.com  Tue Apr 19 13:13:08 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 19 Apr 2005 12:13:08 -0500
Subject: Refactoring in Python.
In-Reply-To: <8764yiog3y.fsf@hector.domek>
References: <8764yiog3y.fsf@hector.domek>
Message-ID: <16997.15396.734173.138934@montanaro.dyndns.org>


    Peter> I am trying to write Master Thesis on refactoring Python code.

    Peter> Where should I look for information?

I'm not sure, but one piece of code to check out would probably be Bicycle
Repair Man, a early-stage prototype refactoring tool for Python.  I don't
recall where it's hosted.  Google will know.

Skip



From Michael.Coll-Barth at VerizonWireless.com  Sat Apr 16 10:42:41 2005
From: Michael.Coll-Barth at VerizonWireless.com (Michael.Coll-Barth at VerizonWireless.com)
Date: Sat, 16 Apr 2005 10:42:41 -0400
Subject: No subject
Message-ID: <20050416144244.7E18F1E4003@bag.python.org>

All,

I have been going through the manuals and not having much luck with the
following code.  This is basically an issue of giving 'split' multiple
patterns to split a string.  If it had an ignore case switch, the problem
would be solved.  Instead, I have to code the following, which works fine
for a single byte string.  What can I do when I want to look for strings?

>>> test = 'A big Fat CAt'
>>> A = test.split('A')
>>> print A
['', ' big Fat C', 't']
>>> a = []
>>> for x in xrange(len(A)):
...     tmp = A[x].split('a')
...     for y in xrange(len(tmp)):
...         a.append(tmp[y])
...
>>>
>>> a
['', ' big F', 't C', 't']



It is odd about the help files, after I figure out how to do something, the
help makes sense.  Before hand is another story...  Are there any others out
there that share this misery? 

thanks,
Michael
___________________________________________________________________
The information contained in this message and any attachment may be
proprietary, confidential, and privileged or subject to the work
product doctrine and thus protected from disclosure.  If the reader
of this message is not the intended recipient, or an employee or
agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination,
distribution or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify me
immediately by replying to this message and deleting it and all
copies and backups thereof.  Thank you.



From davidf at sjsoft.com  Mon Apr 18 04:06:51 2005
From: davidf at sjsoft.com (David Fraser)
Date: Mon, 18 Apr 2005 10:06:51 +0200
Subject: need help in PySparse
In-Reply-To: <4260bcfe@x-privat.org>
References: <4260bcfe@x-privat.org>
Message-ID: <d3vpqq$is5$1@ctb-nnrp2.saix.net>

monocalibro wrote:
> Hello all!
> I need ready-for-use installable version of PySparse (for FiPy), because I
> can't compile it with MingW. Or, may be, somebody knows step-by-step
> instruction to complie this package under Win32 using Mingw?
> Best regards
> 
> 
At least describe the web site you got it from, the versions of Python 
and MinGW you are using, and the errors you got when you tried to build it.

See here for more info on how to ask questions:
http://www.catb.org/~esr/faqs/smart-questions.html

David


From radio913 at aol.com  Sat Apr 30 16:44:27 2005
From: radio913 at aol.com (radio913 at aol.com)
Date: 30 Apr 2005 13:44:27 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <1114329202.229148.82550@o13g2000cwo.googlegroups.com>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
Message-ID: <1114893867.341194.206610@g14g2000cwa.googlegroups.com>


Johnny Gentile wrote:
> C'mon. Everyone knows God plays a Martin.


    But He also has a de Jonge or two...

    Also, i've heard that Satan plays an
old, beat up Takamine....  it's NEVER in
tune, the action is ultra-high, and 
it buzzes like mad.



Slick



From Sebastien.Boisgerault at gmail.com  Fri Apr 29 12:34:28 2005
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 29 Apr 2005 09:34:28 -0700
Subject: doctest's ELLIPSIS
In-Reply-To: <1114790657.829547.59680@g14g2000cwa.googlegroups.com>
References: <1114789524.038880.312510@g14g2000cwa.googlegroups.com>
	<1114790657.829547.59680@g14g2000cwa.googlegroups.com>
Message-ID: <1114792468.495670.98150@z14g2000cwz.googlegroups.com>


Doh ! Obviously ... too bad.

I guess that I could set doctest.ELLIPSIS_MARKER to "[...]" to
distinguish
the two usages of "...". (The "..." used for multiline statements is
hard-coded
into a regular expression pattern).

But it feels too hackish, ELLIPSIS_MATKER being not described in the
docs ...   

Well, anyway, thanks for your insight.

S.B.



From steve at holdenweb.com  Wed Apr 13 07:29:59 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 07:29:59 -0400
Subject: os.path.walk
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB008E@its-xchg4.massey.ac.nz>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E80297B9C6@its-xchg4.massey.ac.nz>
	<ECBA357DDED63B4995F5C1F5CBE5B1E801DB008E@its-xchg4.massey.ac.nz>
Message-ID: <d3ivl1$mos$1@sea.gmane.org>

Tony Meyer wrote:
>>If I have os.path.walk(name, processDirectory, None) and 
>>processDirectory needs three arguments how can I ass them 
>>because walk only takes 3?
> 
> 
> Assuming that processDirectory is a function of yours that returns a bool,
> then you'd do something like:
> 
>   os.path.walk(name, processDirectory(a,b,c))
> 
> Where a, b, and c are the arguments that processDirectory requires.  (You
> can add the None parameter to the os.path.walk call, but it won't change
> anything, since it's the default).
> 
Tony:

I think if you try this you will find that it doesn't work because 
os.path.walk will try to call the *result* of processDirectory(a,b,c) 
for each directory in the path.

You could, however, write a doDirectory() function that called 
processDirectory() when os.path.walk called *it*.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fredrik at pythonware.com  Wed Apr 13 07:56:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 13:56:54 +0200
Subject: for line in file weirdness
References: <1113388411.589754.82600@f14g2000cwb.googlegroups.com>
Message-ID: <d3j189$rvn$1@sea.gmane.org>

"Cordula's Web" <cpghost at cordula.ws> wrote:

> here's a strange bug (?) I've came across (using Python 2.2):
>
> # loop_1
> for line in file:
>    if some_condition(line): break
>    do_something()
>
> # loop_2
> for line in file:
>    do_something_else()
>
> The problem is, that loop_2 doesn't resume where loop_1 left off, but
> skips many lines (a block's worth or so) before continuing.
>
> Why is this? Is reading from a file non-reentrant?

as mentioned in the documentation, the iterator interface (which is used by the
for-in machiner) uses a read-ahead buffer.  in 2.2, whenever you enter a new
loop, a new read-ahead buffer is created, and it starts where the last one ended,
rather than right after the last line you read.

to get more reliable results in 2.2, you can create the iterator outside the loop,
and loop over the iterator object instead of the file itself.

    file = iter(open(...))
    for line in file:
        if some_condition(line): break
        do_something()
    for line in file:
        do_something_else()

(iirc, this quirk was fixed in 2.3)

</F> 





From serpent17 at gmail.com  Fri Apr 15 08:41:03 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 15 Apr 2005 05:41:03 -0700
Subject: key-logging capability using python ?
Message-ID: <1113568863.382537.52200@o13g2000cwo.googlegroups.com>

Hi,

I am commanding a robot through a laptop keyboard and I would like to
be able to record the different keys I hit in order to achieve a
certain goal. I looked at PyHook,
http://sourceforge.net/project/showfiles.php?group_id=65529&package_id=92632&release_id=307838
but it seems to only be available for Python 2.4. However, I using
several modules that are working well under python 2.3 and would like
to remain at 2.3. Is there any other package (with examples) that would
allow me to records events on the keyboard that is compatible with
Python 2.3 ?   

Thank you in advance,

Jake.



From raghulj at gmail.com  Tue Apr  5 23:23:03 2005
From: raghulj at gmail.com (Raghul)
Date: 5 Apr 2005 20:23:03 -0700
Subject: authentication in zope server & Python
In-Reply-To: <1112712052.977243.307630@o13g2000cwo.googlegroups.com>
References: <1112712052.977243.307630@o13g2000cwo.googlegroups.com>
Message-ID: <1112757783.673823.296330@f14g2000cwb.googlegroups.com>

Pls help Guys no idea?



From jstroud at mbi.ucla.edu  Fri Apr  1 15:15:35 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 1 Apr 2005 12:15:35 -0800
Subject: Pseudocode in the wikipedia
In-Reply-To: <d2k70u$70h$1@sea.gmane.org>
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>
	<d2k70u$70h$1@sea.gmane.org>
Message-ID: <200504011215.35188.jstroud@mbi.ucla.edu>

Is anybody else bothered by those stupid pascal-like ":=" assignment 
operators?

Maybe, for the sake of adding more variety to the world, wiki should come up 
with a new assignment operator, like "==". I like that one because then it 
could really be original:

if (bob = 4):
  bob == bob + 2

See how nice that looks? Then we could have people who are used to python and 
c and perl complaining that "=" is for comparison and "==" is for assignment. 
Then the wikilitests would say "hey, man, part and parcel of being a 
programmer is getting assignment and comparison straight--and not making 
typos, you buffoon". But then the guys who have to program in a bunch of 
languages would point out how the wikilitests only psuedo code in wiki--so 
they would never even run the code they wrote. And then some understanding 
fellow would recommend a wiki precompiler to catch "==" inside of "if" 
statements, but then someone else would say that it would limit the 
expressiveness of wiki language:

bob == (carol = 2):
  if bob = (bob or carol):
    bob == 4

But no one could figure out what bob was supposed to equal anyway. And then 
someone would say something about a "Turing Machine", just to show that 
theoretically, the above code could be understood by something theoretical.

James

On Friday 01 April 2005 11:23 am, Terry Reedy wrote:
> <bearophileHUGS at lycos.com> wrote in message
> news:1112362451.848227.208120 at z14g2000cwz.googlegroups.com...
>
> > The free wikipedia is adopting a standard pseudocode:
> > http://en.wikipedia.org/wiki/Wikipedia_talk:Wikicode/Specification

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

http://www.jamesstroud.com/


From Please  Thu Apr 28 10:35:02 2005
From: Please (Please)
Date: 28 Apr 2005 09:35:02 -0500
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_yo?=
 =?iso-8859-1?q?ur_location=2E_I_want_to_ask_you_the_most_important_questi?=
 =?iso-8859-1?q?on_of_your_life=2E_Your_joy_or_sorrow_for_all_eternity_dep?=
 =?iso-8859-1?q?ends_upon_your_answer=2E_The_question_is=3A_Are_you_saved?=
 =?iso-8859-1?q?=3F_It_is_not_a_question_of_how_good_you_are=2C_nor_if_you?=
 =?iso-8859-1?q?_are_a_church_member=2C_but_are_you_saved=3F_Are_you_sure_?=
 =?iso-8859-1?q?you_will_go_to_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP?=
 =?iso-8859-1?q?=B7POST=B7152?=
References: <1114696150.162751.153190@f14g2000cwb.googlegroups.com>
Message-ID: <8ts171t60ejmetq0ursfgglno00ugemgvi@4ax.com>

Report to groups-abuse at google.com, abuse at aol.net, domains at aol.net,
abuse at yahoo.com, abuse at yahoo-inc.com


From none  Thu Apr 28 07:38:21 2005
From: none (Hansan)
Date: Thu, 28 Apr 2005 13:38:21 +0200
Subject: Problem with sending a variable(python) while using html
References: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
	<mailman.2596.1114630252.1799.python-list@python.org>
	<426ff886$0$13746$ba624c82@nntp03.dk.telia.net>
	<4270bb93$1_2@newspeer2.tds.net>
Message-ID: <4270cb0d$0$25502$ba624c82@nntp05.dk.telia.net>

Thanks for you help, it is working now :D

Take care


"Kent Johnson" <kent37 at tds.net> wrote in message 
news:4270bb93$1_2 at newspeer2.tds.net...
> Hansan wrote:
>> Hi.
>>
>> Sorry forgot to post a "non-working" example
>>
>> That could be
>> print "<a href=script.py?id=", variable,  "'>", "some text"  <input 
>> type=hidden name="eventid" value='''+str(variable_name)+'''>'''</a>"
>>
>> I know that it isnt very creative, but I am having a hard time getting 
>> html to work together with python.
>>
>> When the link "some text" is clicked I want to send both the first 
>> variable called variable and the second one(variable_name) to the script 
>> (script.py)
>
> As Hal pointed out you need to put both variables into the link. Also, you 
> should be url-encoding your values using urllib.quote_plus(); otherwise 
> variable values containing characters like &= will cause trouble. So for 
> the link I would use
>
> from ulrlib import quote_plus
> link = "<a href='script.py?id=%s&eventid=%s'>" % 
> (quote_plus(str(variable)), quote_plus(str(variable_name)))
>
> Then you may need urllib.unquote_plus() on the reading end depending on 
> the server.
>
> Kent 




From peufeu at free.fr  Tue Apr 12 06:36:06 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 12:36:06 +0200
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <op.so37qgvcqfv3if@localhost>

> I am confused to chose between C++,Python,Perl.

	Writing scripts in C++, you'll just die of brain burn.

	Python has very good shell integration and I heard it can do funky stuff  
with COM/OLE with a few lines of code where you'd need a few pages worth  
of impossible to understand COM code to do the same in C. Also basic shell  
tasks like spawning processes, piping from / to their output, regular  
expressions, parsing files, etc are a breeze. There are modules for INI  
files, csv files, etc.

	Perl should be about the same, but you have to like the scary syntax.


From codecraig at gmail.com  Thu Apr 21 11:47:52 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 08:47:52 -0700
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
Message-ID: <1114098472.768814.281750@g14g2000cwa.googlegroups.com>

Well so far from what I have found, Perl is faster than Python for
RegEx, although perl is harder to read.



From steve at holdenweb.com  Sat Apr  2 01:05:19 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 02 Apr 2005 01:05:19 -0500
Subject: Installing Python on a Windows 2000 Server
In-Reply-To: <CTm3e.2461$tI6.928@fe2.columbus.rr.com>
References: <CTm3e.2461$tI6.928@fe2.columbus.rr.com>
Message-ID: <d2lcjt$q2$1@sea.gmane.org>

Mike Moum wrote:
> Hi,
> 
> I'm a civil engineer who also doubles as chief programmer for technical 
> applications at my company. Most of our software is written in Visual 
> Basic because our VP in charge of I.T. likes to have "consistency", and 
> at the moment we're a Microsoft shop. He has assigned me the task of 
> developing an new application, the exact nature of which is not 
> important for my question. I told him that, in my opinion, that Visual 
> Basic was not the best choice for developing this application, and that 
> I wanted to use Python. After a bit of discussion of the pros and cons, 
> he said to go ahead. I managed to keep my jaw from hitting the floor. :>)
> 
> We have a central server array running Windows Server 2000 (I think 
> that's the right name; networking is not my specialty, but it's 
> definately Windows). Some of our workstations run Windows 2000; others 
> run Windows XP Pro. I would like to install Python on the server, and 
> run the application that I'll be developing from the workstations, 
> without having to install any Python components on the workstations 
> themselves. In other words, the Python executable, and the various 
> libraries, dll's, and what have you, as well as the application that I'm 
> developing, should all reside on the server. The only thing on the 
> workstations would be a shortcut to myapplication.py.
> 
> Does anyone know whether it is possible to do this? I've done some 
> Google searching, with no conclusive results, and poked about on 
> python.org, but haven't really been able to find anything. Normally I'd 
> be happy to just try it out and see what happens, but we're breaking new 
> ground here (this is an amazingly big step for our hide-bound IS 
> department!), so I'd like everything to go as smoothly as possible.
> 
> TIA,
> Mike

Mike:

Well done, sounds like you are in for a big success!

What you describe sounds like a pretty normal setup, assuming that there 
is a network share accessible to all desktops that the Python binaries 
can be located on.

Windows XP and 2000 run the same Python binaries, so there shouldn't be 
any problems. If I'm wrong this message will bring Tim Peters into the 
conversation, and his opinion can safely be regarded as authoritative 
(right, Tim?).

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From rbt at athop1.ath.vt.edu  Fri Apr  8 15:24:19 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 08 Apr 2005 15:24:19 -0400
Subject: Interpreter problem
In-Reply-To: <mailman.1542.1112977883.1799.python-list@python.org>
References: <425684F8.5060507@novasyshealth.com>	<mailman.1538.1112970334.1799.python-list@python.org>	<d365ha$h33$1@solaris.cc.vt.edu>	<mailman.1540.1112974136.1799.python-list@python.org>	<d368nj$n56$1@solaris.cc.vt.edu>
	<mailman.1542.1112977883.1799.python-list@python.org>
Message-ID: <d36lp3$fnu$1@solaris.cc.vt.edu>

Steve Holden wrote:
> rbt wrote:
> 
>> Steve Holden wrote:
>>
>>> rbt wrote:
>>>
>>>> Steve Holden wrote:
>>>>
>>>>> Greg Lindstrom wrote:
>>>>>
>>>>>> I am using python 2.3.5 on a Linux system and have an odd problem 
>>>>>> dealing with the 'sha-bang' line.  I have a file, driver.py which 
>>>>>> starts with
>>>>>>
>>>>>> #!/usr/bin/python
>>>>>>
>>>>>> and works fine (that is, when I type in ./driver.py at the command 
>>>>>> prompt the file runs as expected).  I have another file, 
>>>>>> myotherfile.py which starts with the exact same line 
>>>>>> (#!/usr/bin/python) but I get
>>>>>>
>>>>>> : bad interpreter: No such file or directory
>>>>>>
>>>>> There's almost certainly a carriage return as well as a newline in 
>>>>> the shebang line.
>>>>>
>>>>> [...]
>>>>>
>>>>> regards
>>>>>  Steve
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Not so. I get the same result with python 2.3 and 2.4 on Debian 
>>>> Linux Testing. Nothing odd at all in the shebang.
>>>
>>>
>>>
>>>
>>> What, you are telling me you've checked the file with a command like
>>>
>>>   head driver.py | od -bc
>>>
>>> and verified the absence of any extraneous characters?
>>>
>>> regards
>>>  Steve
>>
>>
>>
>> You're right:
>>
>> rbt at athop1:~$ cd /usr/local/bin
>> rbt at athop1:/usr/local/bin$ head web* | od -bc
>> 0000000 043 041 057 165 163 162 057 142 151 156 057 160 171 164 150 157
>>           #   !   /   u   s   r   /   b   i   n   /   p   y   t   h   o
>> 0000020 156 015 012 144 145 146 040 167 145 142 137 142 141 143 153 165
>>           n  \r  \n
>>
> Nice to know my psychic powers are still functioning correctly :-)
> 
>> How can this be fixed? vim doesn't see it.
> 
> 
> Do you have a "dos2unix" utility? Otherwise use "tr" to delete \013 
> characters, IIRC - it's a while since I used anything but dos2unix to do 
> this.
> 
> Of course you could just read and write the file in Python in text mode, 
> that might get rid of the returns.
> 
> There's probably a vim mode you can set to display the extraneous 
> characters - it normally screams "^M" at me for files with carriage 
> returns in them. You may find it telling you the file is being edits in 
> "DOS mode" when you open it up, and again there's probably vim magic you 
> can do to force it to write in "unix mode" too - I'll leave that to the 
> vimsters.
> 
> regards
>  Steve

vim -b File_name worked! It shows the ^M's at the end of each line. 
Thanks for the help... this has been bugging me!


From radam2 at tampabay.rr.com  Mon Apr  4 20:21:11 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 00:21:11 GMT
Subject: Decorator Maker is working. What do you think?
Message-ID: <sql3515i90b9v5mojnkaet31ftr57hr99j@4ax.com>



Ok... it's works! :)

So what do you think?

Look at the last stacked example, it process the preprocess's first in
forward order, then does the postprocess's in reverse order.  Which
might be usefull.  Interesting in any case.

Making decorators with this class is a snap!

Any thoughts?  Any improvements?  Any bugs?

Cheers,
Ron_Adam


#---start---


class Decorator(object):
    """
    Decorator - A base class to make decorators with.

    self.function - the function decorated.
    self.arglist - list of arguments of decorator
    self.preprocess - over ride to preprocess function arguments.
    self.postprocess - over ride to postprocess function 
                        return value.
    Example use:
        class mydecorator(Decorate):
        def self.preprocess(self, args):
            # process args
            return args
        def self.postprocess(self, results):
            # process results
            return results

        deco = mydecorator()

        @deco
        def function(args):
            # function body
            return args
    """
    def __init__(self):
        self.function = None
        self.arglist = []
    def __call__(self, *arg):
        if len(arg) == 1:
            arg = arg[0]
        self.arglist.append(arg)
        def _wrapper(*args):
            pre_args = self.preprocess(*args)
            if type(pre_args) is not tuple:
                pre_args = (pre_args,)
            result = self.function(*pre_args)
            return self.postprocess(result)
        if '<function ' in str(arg):
            self.arglist = self.arglist[:-1]
            self.function = arg
            return _wrapper
        return self
    
    def preprocess(self, *args):
        #
        #   Over ride this method.
        #
        return args
    
    def postprocess(self, result):
        #
        #   Over ride this method.
        #
        return result


#---1---
class decorator1(Decorator):
    def preprocess(self, arg):
        newarg = ""
        n = 0
        darg = list(self.arglist[0])
        for a in list(arg):
            newarg += a
            newarg += darg[n]
            n += 1
            if n>=len(darg):
                n = 0            
        return newarg
deco1 = decorator1()

@deco1('_-^-')
def test1(text):        
    return text 
print test1('abcdefg')
# a_b-c^d-e_f-g^


#---2---
class decorator2(Decorator):
    def postprocess(self, result):
        result = result*1.0*self.arglist[0][0]/self.arglist[0][1]
        return result
deco2 = decorator2()

@deco2(2,3)
def test2(a):
    return a  
print test2(7)
# 4.66666666667


#---3---
class decorator3(Decorator):
    def preprocess(self, arg1, arg2):
        arg1 *= 2
        arg2 *= 2
        return arg1, arg2
deco3 = decorator3()

@deco3
def test3(a,b):
    return a,b
print test3(1,3)
# (2, 6)


#---4---
class decorator4(Decorator):
    def postprocess(self, result):
        result = int(result/self.arglist[0])
        return result
deco4 = decorator4()

@deco4(2)
def test4(n1,n2,n3,n4,n5):
    return n1+n2+n3+n4+n5    
print test4(1,2,3,4,5)
# 7


#---5---
class decorator5(Decorator):    
    def preprocess(self, arg):
        arg *= 2
        print 'Preprocess:',self.arglist[0][0],arg
        return arg
    def postprocess(self, result):
        result *= 2
        print 'Postprocess:',self.arglist[0][0],result
        return result
deco5a = decorator5()
deco5b = decorator5()
deco5c = decorator5()
deco5d = decorator5()
deco5e = decorator5()

@deco5a('a')
@deco5b('b')
@deco5c('c')
@deco5d('d')
@deco5e('e')
def test5(i):
    return i

print test5(10)
# Preprocess: a 20
# Preprocess: b 40
# Preprocess: c 80
# Preprocess: d 160
# Preprocess: e 320
# Postprocess: e 640
# Postprocess: d 1280
# Postprocess: c 2560
# Postprocess: b 5120
# Postprocess: a 10240
# 10240

#---end---




From kasimov at i.com.ua  Wed Apr 27 08:27:23 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Wed, 27 Apr 2005 15:27:23 +0300
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <d4mq31$gq3$1@domitilla.aioe.org>
Message-ID: <d4o0l1$2uol$1@news.tsystems.kiev.ua>


"Maurice LING" <mauriceling at acm.org> wrote:
news:d4mq31$gq3$1 at domitilla.aioe.org...
> If your application does not use any C modules, you can try to use
> Jython instead. Program in python but use jythonc to convert it into
> Java source files and package it into Java JAR files, then you will only
> need to release the JAR files without needing to release your codes.

using Jython will not helps to hide your sources - jar-files are also easy
to decompile and to receive the source code (it will even looks like
original).
To avoid releasing your java-code (as far as it possible), the jar-files are
also necessary for processing by obfuscators


--
Best regards,
Maksim Kasimov
mailto: kasimov at i.com.ua




From mfranklin1 at gatwick.westerngeco.slb.com  Thu Apr  7 05:47:27 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 07 Apr 2005 10:47:27 +0100
Subject: logging as root using python script
In-Reply-To: <20050407105048.00004cd2@LAB2-13.esi>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
	<20050407105048.00004cd2@LAB2-13.esi>
Message-ID: <d32vf7$tl$1@sea.gmane.org>

Luis Bruno wrote:
> Raghul wrote:
> 
> 
>>What I need is when I execute a script it should login as root and
>>execute my command and logout from root to my existing account.
> 
> 
> I'm not sure of what you need, so I'll assume your *whole* .py script
> needs root priviledges. In this case, you can configure sudo(8) or use
> su(1).
> 
> For example, the script below does nothing special:
> 
> | #!/usr/bin/env python
> | 
> | print "Hello world!"
> 
> You can run it with higher priviledges if you use sudo(8):
> 
> $ chmod 755 hello.py
> $ sudo ./hello.py
> 
> Or you can use su(1):
> 
> $ su - root -c ./hello.py
> 
> You can configure sudo(8) to not prompt for any password, BTW.
> 
> Cheers!

another alternative would be setuid for more on this (and why it could
be a bad idea) google...

Martin





From sizer at nospam.com  Mon Apr 11 19:25:03 2005
From: sizer at nospam.com (Sizer)
Date: 11 Apr 2005 18:25:03 -0500
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <Xns9635A70671703sizernospamcom@216.40.28.87>

Looking at my followup, I really didn't make it clear that you'll have to 
learn some bash scripting to be an effective *nix administrator, just 
because so many parts of the system use bash scripting. But python is much 
nicer to write anything non-trivial in.


From skip at pobox.com  Mon Apr 11 12:51:44 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 11 Apr 2005 11:51:44 -0500
Subject: Weird...
In-Reply-To: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>
References: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>
Message-ID: <16986.43808.588620.631217@montanaro.dyndns.org>


    >>> {'a':1,'b':'2','c':[3,4]}.keys()
    ['a', 'c', 'b']

    Joshua> How come? :-)

Because:

    >>> {'A':1,'b':'2','Cat':[3,4]}.keys()
    ['A', 'b', 'Cat']

:-)

For more detail:

    http://www.python.org/doc/faq/general.html#id48

Skip


From bokr at oz.net  Sun Apr 17 04:46:23 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 08:46:23 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
Message-ID: <42621c83.157344138@news.oz.net>

On 16 Apr 2005 23:43:03 -0700, "Kay Schluehr" <kay.schluehr at gmx.net> wrote:

>
>Robert Brewer wrote:
>> Bengt Richter wrote:
>> > The '::' unary suite operator should return an ordered dict
>> > subtype representing the bindings
>>
>> Why ordered?
>
>Because You can't otherwise guarantee to feed optional argument
>parameters in a correct way.
>
>Example:
>
>x = property(*seq) where:
>            seq = (item[1] for item in ::
>                def get_x():
>                    return self.__x
>                def set_x(value):
>                    self.__x = value
>                del_x = None
>                doc   = "I'm the 'x' property." )
>
>This statement would not work if the result of '::' ( considered as an
>"ordered dict" ) would return simply a dict because the order of the
>input parameters matters.
>
Exactly. Except the above example is from the day-old-bread items-tuple-returning version of :: ;-)
And with an ordered dict subtype there is no need for the generator expression either,
since there is a values method for dicts (which in the subtype would preserve order). E.g.,

 x = property(*seq) where:
             seq = (::
                 def get_x():
                     return self.__x
                 def set_x(value):
                     self.__x = value
                 del_x = None
                 doc   = "I'm the 'x' property." ).values())

Or more directly:

 x = property(*(::
                 def get_x():
                     return self.__x
                 def set_x(value):
                     self.__x = value
                 del_x = None
                 doc   = "I'm the 'x' property." ).values())

Or eliminating parens by using dedent to end the :: suite:

 x = property(*::
                 def get_x():
                     return self.__x
                 def set_x(value):
                     self.__x = value
                 del_x = None
                 doc   = "I'm the 'x' property."
              .values())

Regards,
Bengt Richter


From davidf at sjsoft.com  Fri Apr 15 11:53:18 2005
From: davidf at sjsoft.com (David Fraser)
Date: Fri, 15 Apr 2005 17:53:18 +0200
Subject: Why does StringIO discard its initial value?
In-Reply-To: <Fx07e.12389$Xm3.8777@trndny01>
References: <XEb6e.556$Cz3.49700@monger.newsread.com>
	<g9m6e.6295$ff4.1793@trndny08> <d3g36e$4oh$1@ctb-nnrp2.saix.net>
	<Fx07e.12389$Xm3.8777@trndny01>
Message-ID: <425FE36E.5090209@sjsoft.com>

Raymond Hettinger wrote:
> [David Fraser]
> 
>>Others may find this helpful ; it's a pure Python wrapper for cStringIO
>>that makes it behave like StringIO in not having initialized objects
>>readonly. Would it be an idea to extend cStringIO like this in the
>>standard library? It shouldn't lose performance if used like a standard
>>cStringIO, but it prevents frustration :-)
> 
> 
> IMO, that would be a step backwards.  Initializing the object and then
> writing to it is not a good practice.  The cStringIOAPI needs to be as
> file-like as possible.  With files, we create an emtpy object and then
> starting writing (the append mode for existing files is a different story).
> Good code ought to maintain that parallelism so that it is easier to
> substitute a real file for a writeable cStringIO object.
> 
> This whole thread (except for the documentation issue which has been
> fixed) is about fighting the API rather than letting it be a guide to good
> code.
> 
> If there were something wrong with the API, Guido would have long
> since fired up the time machine and changed the timeline so that all
> would be as right as rain ;-)

But surely the whole point of files is that you can do more than either 
creating a new file or appending to an existing one (seek, write?)

The reason I wrote this was to enable manipulating zip files inside zip 
files, in memory. This is on translate.sourceforge.net - I wanted to 
manipulate Mozilla XPI files, and replace file contents etc. within the 
XPI. The XPI files are zip format that contains jars inside (also zip 
format). I needed to alter the contents of files within the inner zip files.

The zip classes in Python can handle adding files but not replacing 
them. The cStringIO is as described above.

So I created extensions to the zipfile.ZipFile class that allow it to 
delete existing files, and add them again with new contents (thus 
replacing them).

And I created wStringIO so that I could do this all inplace on the 
existing zip files.

This all required some extra hacking because of the dual-layer zip files.

But all this as far as I see would have been really tricky using the 
existing zipfile and cStringIO classes, which both assume (conceptually) 
that files are either readable or new or merely appendable (for zipfile).

The problem for me was not that cStringIO classes are too similar to 
files, it was that they are too dissimilar. All of this would work with 
either StringIO (but too slow) or real files (but I needed it in memory 
because of the zipfiles being inside other zip files).

Am I missing something?

David


From Domenique.Tilleuil at gmail.com  Wed Apr 20 16:10:19 2005
From: Domenique.Tilleuil at gmail.com (Domenique.Tilleuil at gmail.com)
Date: 20 Apr 2005 13:10:19 -0700
Subject: pyGTK on Mouse over event ?
In-Reply-To: <4266af16$0$31058$626a14ce@news.free.fr>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
Message-ID: <1114027819.338892.278590@z14g2000cwz.googlegroups.com>

if i add a motion_notify or even a butten_press event to an image
object it does absolutly nothing :s



From danb_83 at yahoo.com  Fri Apr  1 07:00:35 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 1 Apr 2005 04:00:35 -0800
Subject: Combining digit in a list to make an integer
References: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>
	<1112355049.196021.182720@g14g2000cwa.googlegroups.com>
	<1112355398.158653.109790@g14g2000cwa.googlegroups.com>
Message-ID: <1112356835.331635.233150@l41g2000cwc.googlegroups.com>

Harlin Seritt wrote:
> If anyone has time, would you mind explaining the code that Dan
Bishop
> was so kind as to point out to me:
>
> int(''.join(num1))
>
> This worked perfectly for me, however, I'm not sure that I understand
> it very well.

join(...)
    S.join(sequence) -> string

    Return a string which is the concatenation of the strings in the
    sequence.  The separator between elements is S.

For example:

>>> '<'.join(['1', '2', '3'])
'1<2<3'

If you don't want a separator, simply let S be the empty string ('').



From hancock at anansispaceworks.com  Sat Apr 23 00:35:25 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 23:35:25 -0500
Subject: python classes/file structure
In-Reply-To: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>
References: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>
Message-ID: <200504222335.26041.hancock@anansispaceworks.com>

On Thursday 21 April 2005 08:48 am, codecraig wrote:
> widget = gui.MyCustomWidget.MyCustomWidge()
> 
> ...seems weird, how should I structure this?  Is it not common to have
> one class in a .py?

No, it isn't really. Usually, there will be several related classes in a single
module.  Only if the classes get really large would I bother to separate
them out into separate files.  "One class per module" is perlthink. ;-)

Someone has already mentioned using __init__.py to control how your
classes are assembled into the package namespace.

You should also be aware that:

from gui.MyCustomWidget import MyCustomWidget

is a pretty common idiom too.

Cheers,
Terry


--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From deetsNOSPAM at web.de  Fri Apr 29 07:42:17 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 29 Apr 2005 13:42:17 +0200
Subject: interactive web graphics
References: <mailman.7.1114734747.14961.python-list@python.org>
Message-ID: <d4t6io$sag$05$1@news.t-online.com>

> In case anyone is interested...
> The initial plan was to use a GTK+ GUI
> to monitor these models and the GIMP
> library to create an indexed image from
> the pressure field, overlayed with vectors
> depicting winds (or currents, for the ocean).
> Think I'll take another look at pygtk.

Take qt if you can - the upcoming version qt4 will be GPLed for windows
(which means better binary support for windows), but recently the qt3 x11
free edition got adapted to windows. I use that myself, and have to say
that I'm pretty impressed - apart from some real minor glitches (e.g. the
date entry widget shows some highlighting problems) things work smooth. And
qt is a fantastic toolkit. And very well worth the money you have to buy it
- the time and effort saved using a well-designed orthogonal toolkit will
make the cost amortise pretty quick. Especially when used in conjunction
with PyQt.
 
-- 
Regards,

Diez B. Roggisch


From tzot at sil-tec.gr  Thu Apr 14 10:09:33 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 14 Apr 2005 17:09:33 +0300
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
Message-ID: <o9us51l3jqopbbmfgiao8oljmf5srblofk@4ax.com>

On 14 Apr 2005 02:27:26 -0700, rumours say that c3poptuse at yahoo.com
might have written:

>Supercomputer and encryption and compression @ rate of 96%

[snip]

In other words, the story of your life can be expressed as a single
binary zero.  Get one.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From deetsNOSPAM at web.de  Fri Apr  8 15:09:53 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 08 Apr 2005 21:09:53 +0200
Subject: sending signals to child process
References: <u1x9ldsw2.fsf@raytheon.com>
Message-ID: <d36ktu$vgl$05$1@news.t-online.com>

Sarir Khamsi wrote:

> I would like to start a child process (like w/ popen3(), or some such)
> and then be able to interrupt it by sending it a control-c. How do I
> do that in Python? Is there a better way to gracefully halt a child

Use os.kill and the signal module.

> process? Is there a more cross-platform way to start a child process
> (popen() is only on UNIX/Win32)? Thanks.

In python2.4 there is the subprocess module.
-- 
Regards,

Diez B. Roggisch


From jmsouth at indiana.edu  Fri Apr 29 11:31:50 2005
From: jmsouth at indiana.edu (Josh)
Date: Fri, 29 Apr 2005 10:31:50 -0500
Subject: Sockets  SO_RCVBUF
Message-ID: <d4tk16$53s$1@rainier.uits.indiana.edu>

I have written a simple TCP client/server.  I would like to change the TCP 
receive buffer on the server side, to see performance differences.  I am 
trying



err = sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 4096)



but that doesn't seem to actual change the buffer size.



The code is:



#Create a socket

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)



#Ensure that you can restart your server quickly when it terminates

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)



#Set the Recieve Buffer Size

err = sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 4096)



print socket.SO_RCVBUF

#Set the client socket's TCP port number

sock.bind(('', portno))



Development is being done a Gentoo Linux box.



Any suggestions would be great!



-Thanks







From john at castleamber.com  Mon Apr 25 21:46:01 2005
From: john at castleamber.com (John Bokma)
Date: 26 Apr 2005 01:46:01 GMT
Subject: Python or PHP?
References: <pan.2005.04.26.00.01.53.726156@jerf.org>
	<mailman.2492.1114476385.1799.python-list@python.org>
Message-ID: <Xns9643D336E2837castleamber@130.133.1.4>

Steve Holden wrote:

> Yup.

Even aol in this group...

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


From ritterhaus at yahoo.com  Thu Apr  7 10:11:53 2005
From: ritterhaus at yahoo.com (ritterhaus at yahoo.com)
Date: 7 Apr 2005 07:11:53 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <pan.2005.04.06.22.44.00.857559@jerf.org>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
	<pan.2005.04.06.22.44.00.857559@jerf.org>
Message-ID: <1112883113.734835.227480@z14g2000cwz.googlegroups.com>

I appreciate all the responses. It IS possible that wx and/or python is
whacked on my machine. I've got python 2.2 and 2.3 installed, I have
installed and uninstalled 2.4, I've had about three versions of wx
installed along the way for different programs, so it is possible that
it is just my machine.

Nevertheless, I came here looking for ideas, and you've given me some
good ones: some I had already tried (but I like validation) and some
were new to me. Thanks, all.



From bvande at po-box.mcgill.ca  Tue Apr  5 10:43:31 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 05 Apr 2005 10:43:31 -0400
Subject: Change between Python 2.3 and 2.4 under WinXP
In-Reply-To: <d2u0t9$lbp$1@solaris.cc.vt.edu>
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com>
	<mailman.1280.1112603141.1799.python-list@python.org>
	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>
	<mailman.1299.1112626394.1799.python-list@python.org>
	<4251d375$0$23625$9b622d9e@news.freenet.de>
	<d2u0t9$lbp$1@solaris.cc.vt.edu>
Message-ID: <4252A413.1040606@po-box.mcgill.ca>

rbt said unto the world upon 2005-04-05 08:39:
> Martin v. L?wis wrote:
> 
>> Of course, it is not all that clear what the OP actually wanted.
>> For all we know, he wanted to "alternate quickly (with batch
>> file or similary) between python23 and python24"...
> 
> 
> Maybe off-topic for this thread, but I noticed that when installing 
> 2.4.1 that 2.4.0 is automatically removed. Does 2.4 do the same thing to 
> 2.3 versions?

Hi,

on a different thread

<http://groups.google.ca/groups?hl=en&lr=&safe=off&selm=42353d7d%240%2419431%249b622d9e%40news.freenet.de>

Martin said that only one 2.4 version at a time is supported due to 
there being only one python24.dll.

But the msi install process now informs you of this (thanks Martin :-)

Best,

Brian vdB



From rbt at athop1.ath.vt.edu  Wed Apr  6 09:37:04 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 06 Apr 2005 09:37:04 -0400
Subject: shebang in cross platform scripts
Message-ID: <d30om0$lb4$1@solaris.cc.vt.edu>


Haven't tested this on Windows yet... thought I'd ask here:

Does the line below have any negative impact on Windows machines? I 
develop and test mostly on Unix, but my scripts are often used on Win 
systems too.

#!/usr/bin/env python

Many thanks,

rbt



From gurpreet.sachdeva at gmail.com  Mon Apr 25 05:56:50 2005
From: gurpreet.sachdeva at gmail.com (Gurpreet Sachdeva)
Date: Mon, 25 Apr 2005 15:26:50 +0530
Subject: Getting into Python, comming from Perl.
In-Reply-To: <426BDDB7.8010403@amplitudenet.pt>
References: <426BDDB7.8010403@amplitudenet.pt>
Message-ID: <a3cc95f00504250256274cd505@mail.gmail.com>

I also coded for more than 3 years and eventually I got that I was not
coding but writting poems in perl... Even after 3 months, I go back
and check my hand written code, I had to think twice about the logic
used...
Now its pretty much systematic which incode dcoumentation and
programming structure.

Rest both are blessed by open source...

Regards,
Garry

On 4/24/05, Miguel Manso <mmanso at amplitudenet.pt> wrote:
> Hi, list.
> 
> I'm into a psicological doubt that I would like to share with you
> (you'll know why later on this mail).
> 
> I'm a programmer with 5 year of experience into Perl. I'm on that point
> where you resolve problems without thinking on HOW you'll do it with
> that language but only on the problem itself.
> 
> Since Perl 6 started I've been following it. The conclusion I have is
> they're making a whole new language and I'll have to learn it. This
> being said and, since I've to learn a new language, I've started
> thinking in a new language. I've noticed Python is getting more and more
> developers and many projects are being made.
> 
> I've tryed to use python some times but I get frustrated very quick. I
> get myself many times needing to figure out how to loop through a list,
> declare an associative array, checking how to pass named parameters to
> functions, and simple things like that.
> 
> What I would like to know is if anyone had these problems and if you can
> share that experience with me. I'm trying to minimize my "frustration" :)
> 
> Thanks a lot.
> 
> --
> Miguel Manso <mmanso at amplitudenet.pt>
> ============================================
> Amplitude Net
> Net - Rua dos Salazares, 842
> 4100-442 Porto
> 
> Phone: +351 22 532 2000
> Fax: +351 22 618 2157
> Web: www.amplitudenet.pt
> ============================================
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
Thanks and Regards,
GSS


From __peter__ at web.de  Fri Apr  1 03:59:39 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 01 Apr 2005 10:59:39 +0200
Subject: split an iteration
References: <mailman.1145.1112291727.1799.python-list@python.org>
	<d2hfkc$mn1$05$1@news.t-online.com>
	<424C7AFB.9090008@jessikat.fsnet.co.uk>
Message-ID: <d2j2hu$aed$02$1@news.t-online.com>

Robin Becker wrote:

> eg for
> >>>?e?=?enumerate([0,1,2,3,4,5])
> >>>?for?i,a?in?e:
> ... ????????if a==3: break
> ...
> >>>?for?i,a?in?e:
> ... ????????print i,a
> ...
> 4 4
> 5 5
> >>>
> 
> I think the second loop needs to start at 3 ie the split needs to be
> start, limit semantics
> 
> It would be nice to be able to fix it with a move back method.

I have to reread your previous post, it seems. Meanwhile:

>>> e = enumerate(range(6))
>>> for i, a in e:
...     if a == 3:
...             for i, a in itertools.chain([(i, a)], e):
...                     print i, a
...             break
...
3 3
4 4
5 5

Nesting the loops is necessary to handle empty lists and lists with no
matching item correctly. Alternatively, you could set a 'found' flag.

Another option:

>>> def predicate((i, a)): return a != 3
...
>>> for i, a in itertools.dropwhile(predicate, enumerate(range(6))):
...     print i, a
...
3 3
4 4
5 5

The extra function call might have a negative impact on performance, though.

Peter



From bac at OCF.Berkeley.EDU  Sun Apr  3 03:54:46 2005
From: bac at OCF.Berkeley.EDU (Brett C.)
Date: Sat, 02 Apr 2005 23:54:46 -0800
Subject: python-dev Summary for 2005-03-16 through 2005-03-31 (my last)
Message-ID: <424FA146.6010403@ocf.berkeley.edu>

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2005-03-16_2005-03-31.html]



=====================
Summary Announcements
=====================

---------------
My last summary
---------------
So, after nearly 2.5 years, this is my final python-dev Summary.  Steve
Bethard, Tim Lesher, and Tony Meyer will be taking over for me starting with
the April 1 - April 15 summary (and no, this is not an elaborate April Fool's).
 I have learned a ton during my time doing the Summaries and I appreciate
python-dev allowing me to do them all this time.  Hopefully I will be able to
contribute more now in a programming capacity thanks to having more free time.

--------------------
PyCon was fantastic!
--------------------
For those of you who missed PyCon, you missed a great one!  It is actually my
favorite PyCon to date.  Already looking forward to next year.

--------------------
Python fireside chat
--------------------
Scott David Daniels requested a short little blurb from me expounding on my
thoughts on Python.  Not one to pass on an opportunity to just open myself and
possibly shoot myself in the foot, I figured I would take up the idea.  So here
we go...

First, I suspect Python 3000 stuff will start to make its way into Python.
Stuff that doesn't break backwards compatibility will most likely start to be
implemented as we head toward the Python 2.9 barrier (Guido has stated several
times that there will never be a Python 2.10).  Things that are not
backwards-compatible will most likely end up being hashed out in various PEPs.
 All of this will allow the features in Python 3000 to be worked in over time
so there is not a huge culture shock.

As for things behind the scenes, work on the back-end will move forward.  Guido
himself has suggested that JIT work should be looked into (according to an
interview at http://www.devsource.com/article2/0,1759,1778272,00.asp).  I know
I plan to fiddle with the back-end to see if the compiler can be made to do
more work.

Otherwise I expect changes to be made, flame wars to come and go, and for
someone else to write the python-dev Summaries.  =)


=========
Summaries
=========

----------------
Python 2.4.1 out
----------------
Anthony Baxter, on behalf of python-dev, has released `Python 2.4.1`_.

.. _Python 2.4.1: http://www.python.org/2.4.1/

Contributing threads:
  - `RELEASED Python 2.4.1, release candidate 1
<http://mail.python.org/pipermail/python-dev/2005-March/051992.html>`__
  - `RELEASED Python 2.4.1, release candidate 2
<http://mail.python.org/pipermail/python-dev/2005-March/052270.html>`__
  - `BRANCH FREEZE for 2.4.1 final, 2005-03-30 00:00 UTC
<http://mail.python.org/pipermail/python-dev/2005-March/052444.html>`__
  - `RELEASED Python 2.4.1 (final)
<http://mail.python.org/pipermail/python-dev/2005-March/052467.html>`__


-----------------
AST branch update
-----------------
I, along with some other people, sprinted on the `AST branch`_ at PyCon.  This
led to a much more fleshed out design document (found in Python/`compile.txt`_
in the AST branch), the ability to build on Windows, and applying Nick
Coghlan's fix for hex numbers.

Nick also did some more patch work and asked how AST work should be tagged.
There is now an AST category on SourceForge that people should use to flag
things as for the AST.  They should also, by default, assign such items to me
("bcannon" on SF).  We have also taken to flagging threads on the AST with
"[AST]" as the first item in the subject line.

There was also a slight discussion/clarification on the functions named
marshal_write_*() that output a byte format for the AST that is supposed to be
agnostic of implementation.  This will most likely end up being used as the way
to pass AST objects back and forth between C and Python code.  But with the
name collision of the word "marshal" with the actual 'marshal' module, it needs
to be changed.  I have suggested

- byte_encode
- linear_form
- zephyr_encoding
- flat_form
- flat_prefix
- prefix_form

while Nick Coghlan suggsted

- linear_ast
- bytestream_ast

Obviously I prefer "form" and Nick prefers "ast".  With Nick's reply being
independent of mine it will most likely have "linear" or "byte" in the name.

With the patches for descriptors and generator expressions sitting on SF,
syntactic support for all of Python 2.4 should get applied shortly.  After that
it will come down to bug hunting and such.  There is a todo list in the design
doc for those interested in helping out.

.. _AST branch:
http://cvs.sourceforge.net/viewcvs.py/python/python/dist/src/Python/?only_with_tag=ast-branch
.. _compile.txt:
http://cvs.sourceforge.net/viewcvs.py/python/python/dist/src/Python/Attic/compile.txt?rev=1.1.2.10&only_with_tag=ast-branch&view=markup

Contributing threads:
  - `Procedure for AST Branch patches
<http://mail.python.org/pipermail/python-dev/2005-March/052308.html>`__
  - `[AST] A somewhat less trivial patch than the last one. . .
<http://mail.python.org/pipermail/python-dev/2005-March/052336.html>`__
  - `[AST] question about marshal_write_*() fxns
<http://mail.python.org/pipermail/python-dev/2005-March/052340.html>`__


-------------------------------------------------------
Putting docstrings before function declarations is ugly
-------------------------------------------------------
The idea of moving docstrings before a 'def' was proposed, making it like most
other practices in other languages.  But very quickly people spoke up against
the suggestion.  A main argument was people just like the current way much
better.  I personally like the style so much that even in my C code I put the
comment for all functions after the first curly brace, indented to match the
flow of code.

There was also an issue of ambiguity.  How do you tell where the docstring for
a module is when there is a function definition with a comment right after?::

  """Module doc"""

  """Fxn doc"""
  def foo(): pass

There is an ambiguity there thanks to constant string concatenation.

In the end no one seemed to like the idea.

Contributing threads:
  - `docstring before function declaration
<http://mail.python.org/pipermail/python-dev/2005-March/052406.html>`__


-------------------------------------------
PyPI improvements thanks to PyCon sprinting
-------------------------------------------
Thanks to the hard work of Richard Jones, "Fred Drake, Sean Reifschneider,
Martin v. L?wis, Mick Twomey, John Camara, Andy Harrington, Andrew Kuchling,
David Goodger and Ian Bicking (with Barry Warsaw in a supporting role)"
accordinng to Richard, there are a bunch of new features to PyPI_ (pronounced
"pippy" to prevent name clashes with PyPy).  These improvements include using
reST_ for descriptions, a new 'upload' feature for Distutils (requires Python
2.5), ability to sign releases using OpenPGP (requires Python 2.5), metadata
fields are now expected to be UTF-8 encoded, interface cleanup, and saner URLs
for projects (e.g., http://www.python.org/pypi/roundup/0.8.2).

.. _PyPI: http://www.python.org/pypi/

Contributing threads:
  - `New PyPI broken package editing
<http://mail.python.org/pipermail/python-dev/2005-March/052360.html>`__
  - `Re: python/dist/src/Lib/distutils/command upload.py, 1.3, 1.4
<http://mail.python.org/pipermail/python-dev/2005-March/052362.html>`__


-------------------------------
Decorators for class statements
-------------------------------
The desire to have decorators applied to class statements was brought up once
again.  Guido quickly responded, though, stating that unless a compelling use
case that showed them much more useful than metaclasses it just would not happen.

Contributing threads:
  - `@decoration of classes
<http://mail.python.org/pipermail/python-dev/2005-March/052369.html>`__


===============
Skipped Threads
===============
+ itertools.walk()
+ Problems with definition of _POSIX_C_SOURCE
+ thread semantics for file objects
    Assume nothing is thread-safe
+ Draft PEP to make file objects support non-blocking mode.
+ Faster Set.discard() method?
+ __metaclass__ problem
+ Example workaround classes for using Unicode with csv module...
+ Change 'env var BROWSER override' semantics in webbrowser.py
+ bdist_deb checkin comments
+ Python 2.4 | 7.3 The for statement
+ Patch review: all webbrowser.py related patches up to	2005-03-20
+ webbrowser.py: browser >/dev/null 2>&1
+ C API for the bool type?
+ Shorthand for lambda
+ FYI: news items about Burton Report on P-languages
+ using SCons to build Python
+ 64-bit sequence and buffer protocol
+ Pickling instances of nested classes
+ python.org/sf URLs aren't working?



========
Epilogue
========

------------
Introduction
------------

This is a summary of traffic on the `python-dev mailing list`_ from
March 16, 2005 through March 31, 2005.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This is the sixty-first summary written by Brett Cannon (it's been fun).

To contact me, please send email to brett at python.org.  Do *not*
post to comp.lang.python if you wish to reach me.

The `Python Software Foundation`_ is the non-profit organization that
holds the intellectual property for Python.  It also tries to advance
the development and use of Python.  If you find the python-dev Summary
helpful please consider making a donation.  You can make a donation at
http://python.org/psf/donations.html .  Every penny helps so even a
small donation with a credit card, check, or by PayPal helps.


--------------------
Commenting on Topics
--------------------

To comment on anything mentioned here, just post to
`comp.lang.python`_ (or email python-list at python.org which is a
gateway to the newsgroup) with a subject line mentioning what you are
discussing.  All python-dev members are interested in seeing ideas
discussed by the community, so don't hesitate to take a stance on
something.  And if all of this really interests you then get involved
and join `python-dev`_!


-------------------------
How to Read the Summaries
-------------------------

The in-development version of the documentation for Python can be
found at http://www.python.org/dev/doc/devel/ and should be used when
looking up any documentation for new code; otherwise use the current
documentation as found at http://docs.python.org/ .  PEPs (Python
Enhancement Proposals) are located at http://www.python.org/peps/ .
To view files in the Python CVS online, go to
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ .  Reported
bugs and suggested patches can be found at the SourceForge_ project
page.

Please note that this summary is written using reStructuredText_.
Any unfamiliar punctuation is probably markup for reST_ (otherwise it
is probably regular expression syntax or a typo =); you can safely
ignore it.  I do suggest learning reST, though; it's simple and is
accepted for `PEP markup`_ and can be turned into many different
formats like HTML and LaTeX.  Unfortunately, even though reST is
standardized, the wonders of programs that like to reformat text do
not allow me to guarantee you will be able to run the text version of
this summary through Docutils_ as-is unless it is from the
`original text file`_.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
.. _c.l.py:
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _PEP Markup: http://www.python.org/peps/pep-0012.html

.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _PSF:
.. _Python Software Foundation: http://python.org/psf/

.. _last summary: http://www.python.org/dev/summary/2005-03-01_2005-03-15.html
.. _original text file: http://www.python.org/dev/summary/2005-03-16_2005-03-31.ht
.. _archive: http://www.python.org/dev/summary/
.. _RSS feed: http://www.python.org/dev/summary/channews.rdf



From bokr at oz.net  Fri Apr 22 22:10:57 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 23 Apr 2005 02:10:57 GMT
Subject: grouping subsequences with BIO tags
References: <wPidnSMBAONhgfXfRVn-sw@comcast.com>	<42686970.196123600@news.oz.net>
	<x8CdnR_SuMhL5vTfRVn-pA@comcast.com>
	<mailman.2319.1114210929.1799.python-list@python.org>
Message-ID: <4269a8ee.277913338@news.oz.net>

On Fri, 22 Apr 2005 16:01:42 -0700, Michael Spencer <mahs at telcopartners.com> wrote:

>Steven Bethard wrote:
>> Bengt Richter wrote:
>> 
>>> On Thu, 21 Apr 2005 15:37:03 -0600, Steven Bethard 
>>> <steven.bethard at gmail.com> wrote:
>>>
>>>> I have a list of strings that looks something like:
>>>>    ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
>
>[snip]
>>>
>>> With error checks on predecessor relationship,
>>> I think I'd do the whole thing in a generator,
>
>I'm curious why you (Bengt or Steve) think the generator is an advantage here. 
>As Steve stated, the data already exists in lists of strings.

I hadn't seen your post[1], which I think is a nice crisp and clever solution ;-)

I just wrote what I thought was a straightforward solution, anticipating that
the imput list might be some huge bioinfo thing, and you might want to iterate
through the sublists one at a time and not want to build the whole list of
lists as represented by your stack.

[1] I don't know why stuff arrives almost instantly sometimes, and sometimes quite
delayed and out of order, but it is a bit embarrassing to post a me-too without
relevant comment, or being able to decide whether to play open source leapfrog.
In this case, I don't see a lily pad on the other side of your code, other than
the memory aspect ;-)

>
>The direct list-building solution I posted is simpler, and quite a bit faster.
>
>L = ['O', 'B_X', 'B_Y', 'I_Y', 'O', 'B_X', 'I_X', 'B_X']
>
>def timethem(lst, funcs = (get_runsSB, get_runsMS, get_runsBR)):
>     for func in funcs:
>         print shell.timefunc(func, lst)
>
>  >>> timethem(L)
>  get_runsSB(...)  7877 iterations, 63.48usec per call
>  get_runsMS(...)  31081 iterations, 16.09usec per call
>  get_runsBR(...)  16114 iterations, 31.03usec per call
>
>
>Michael
>

Regards,
Bengt Richter


From steve at holdenweb.com  Tue Apr  5 19:38:38 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 19:38:38 -0400
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
Message-ID: <d2v7dk$4h5$2@sea.gmane.org>

Ron_Adam wrote:
> On Tue, 05 Apr 2005 02:55:35 -0400, Steve Holden <steve at holdenweb.com>
> wrote:
> 
> 
>>Ron_Adam wrote:
>>
>>>Ok, that post may have a few(dozen?) problems in it.  I got glitched
>>>by idles not clearing variables between runs, so it worked for me
>>>because it was getting values from a previous run.
>>>
>>>This should work better,  fixed a few things, too.
>>>
>>>The decorators can now take more than one argument.
>>>The function and arguments lists initialize correctly now.
>>>
>>
>>Ron:
>>
>>I've followed your attempts to understand decorators with interest, and 
>>have seen you engage in conversation with many luminaries of the Python 
>>community, so I hesitate at this point to interject my own remarks.
> 
> 
> I don't mind.  It might help me communicate my ideas better.
> 
> 
>>In a spirit of helpfulness, however, I have to ask whether your 
>>understanding of decorators is different from mine because you don't 
>>understand them or because I don't.
> 
> 
> Or it's just a communication problem, and we both understand.
> Communicating is not my strongest point. But I am always willing to
> clarify something I say.
> 
> 
>>You have several times mentioned the possibility of a decorator taking 
>>more than one argument, but in my understanding of decorators this just 
>>wouldn't make sense. A decorator should (shouldn't it) take precisely 
>>one argument (a function or a method) and return precisely one value (a 
>>decorated function or method).
>>
>>
>>>It doesn't work with functions with more than one variable.  It seems
>>>tuples don't unpack when given to a function as an argument.  Any way
>>>to force it?
> 
> 
> What I was referring to is the case:
> 
>     @decorator(x,y,z) 
> 
> As being a decorator expression with more than one argument.  and not:
> 
>     @decorator(x)(y)
> 
> This would give a syntax error if you tried it.
> 
> 
>>>>@d1(1)(2)
> 
> SyntaxError: invalid syntax
> 
> The problem I had with tuple unpacking had nothing to do with
> decorators.  I was referring to a function within the class, and I
> needed to be consistent with my use of tuples as arguments to
> functions and the use of the '*' indicator.
> 
> 
>>Do you understand what I mean when I say a decorator should take one 
>>function as its argument and it should return a function?
>>
>>regards
>> Steve
> 
> 
> Hope this clarifies things a bit.
> 
> Cheers,
> Ron
> 
> 
So what you are saying is that you would like to be able to use 
arbitrarily complex expressions after the :at" sign, as long as they 
return a decorator? If so, you've been "pronounced" :-)

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From suggest at mathworks.com  Wed Apr  6 15:42:29 2005
From: suggest at mathworks.com (MATLAB/Simulink Suggestions)
Date: Wed, 6 Apr 2005 15:42:29 -0400 (EDT)
Subject: Mail Delivery (failure suggest@mathworks.com)
Message-ID: <200504061942.j36JgTu04671@fred-ce0.mathworks.com>

Hello,

Thank you for sending us your comments. Any new suggestions or product 
enhancement requests that are sent to this address are immediately entered into
our database and forwarded to the appropriate group in our Development staff.
Every suggestion and enhancement request is reviewed and considered when
designing and developing future products or future releases of existing
products. 

We will not contact you again regarding this issue unless we need any 
follow-up information. 

Sincerely,

The MathWorks, Inc.

For Support, Licensing, Usability Testing, and general contact information: 
http://www.mathworks.com/company/contact.shtml 


 


From sunnan at handgranat.org  Wed Apr  6 07:21:54 2005
From: sunnan at handgranat.org (Sunnan)
Date: Wed, 06 Apr 2005 11:21:54 GMT
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
 Flaw
In-Reply-To: <du7zmwcgzh5.fsf@mozart.cc.tut.fi>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<du7zmwcgzh5.fsf@mozart.cc.tut.fi>
Message-ID: <mDP4e.21483$d5.157888@newsb.telia.net>

Ville Vainio wrote:
> Boring code is code that numbs your senses with constant flow of
> boilerplate crap, memory management and redundant type declarations
> and general blah blah that you skip when you are trying to figure out
> what a piece of code does.

The python code I've read so far has looked like that. Not type 
declarations, but loooong class declarations.

Also, Guido recently urged people to explicitly write recursions rather 
than to use reduce - which I thought was completely in line with what 
I've seen as python's goals: readability/understandability as more 
important than terseness/non-boringness.

 > It's a code that you wish you could train a
> monkey to write for you while you go for lunch. Think C++ or Java.
> 

Oh, yes. C++ and Java can be super boring. C++ can also be pretty hard 
to understand - it's not all boilerplate.

I'm not saying Python is always boring (maybe I've just been in an 
easily bored mood when I've read Python stuff), and I'm not saying that 
boring is always bad.

Yesterday, I read some marketing prop describing a proprietary IDE 
(don't remember what language) as "exciting", and I went "Ugh, no 
thanks! Give me calm computing." And then I thought - wait: I just 
ranted about boringness on comp.lang.python. Can't boring and calm 
sometimes mean the same thing?


From ville at spammers.com  Thu Apr 28 07:34:09 2005
From: ville at spammers.com (Ville Vainio)
Date: 28 Apr 2005 14:34:09 +0300
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
	<d4qaqn$59u$2@eeyore.INS.cwru.edu>
	<du7k6mnmcrb.fsf@lehtori.cc.tut.fi>
	<d4qdfg$afj$1@eeyore.INS.cwru.edu>
Message-ID: <du7wtqn5e4u.fsf@lehtori.cc.tut.fi>

>>>>> "Brian" == Brian Beck <exogen at gmail.com> writes:

    Brian> Ville Vainio wrote:
    >> Perhaps you are just being impatient?
    >> 
    >> Also, make sure that Preferences/pydev/code completion has
    >> "Autocomplete on '.'" box checked.

    Brian> Yeah, that option is enabled. I actually just discovered
    Brian> that it does work in the example you give and for other
    Brian> modules in the standard library. But calls to standard
    Brian> library modules only occur maybe twice in any of my big
    Brian> scripts... the problem is I've been trying code completion
    Brian> with third-party modules and local classes, which still
    Brian> doesn't work.

>From the faq at http://pydev.sourceforge.net/faq.html:

How do I set the PYTHONPATH for code completion to work in my project?


To set the PYTHONPATH for code completion purposes, you have to right
click your project root, choose properties->PyDev PYTHONPATH and set
it. The Restore PYTHONPATH button should get your enviroment
PYTHONPATH and automatically set it. If it does not work, check python
interpreter is correctly set (see questions above).

Does this help?

-- 
Ville Vainio   http://tinyurl.com/2prnb


From contact at alanlittle.org  Mon Apr 25 03:39:26 2005
From: contact at alanlittle.org (Alan Little)
Date: 25 Apr 2005 00:39:26 -0700
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org>	<IFEpEp.7Gz@bath.ac.uk>	<mailman.2346.1114273424.1799.python-list@python.org>	<zhzae.2305$5I5.222813@newshog.newsread.com>	<3d04e3F6pjhi5U1@individual.net>
	<mailman.2419.1114383838.1799.python-list@python.org>
Message-ID: <4ef0f3a4.0504242339.56b0506d@posting.google.com>

Steve Holden <steve at holdenweb.com> wrote:

>Your statement then becomes
>
>select * from foo where bar=1; drop table foo
>
>which is clearly not such a good idea.

I'm sure Steve is very well aware of this and was just providing a
simple and obvious example, nevertheless it might be worth pointing
out that anyody who connects their web application to their database
as a user that has DROP TABLE privileges, would clearly be in need of
a lot more help on basic security concepts than just advice on
choosing a programming language.

This goes back to the point somebody made earlier on in the thread -
many web applications can be implemented as fairly simple wrappers
around properly designed databases. "Properly designed" includes
giving some thought to table ownership and privileges.


From draghuram at gmail.com  Wed Apr 27 23:20:28 2005
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 27 Apr 2005 20:20:28 -0700
Subject: Question about python code distribution...
Message-ID: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>

Hi,

I am sure that this question might have come up repeatedly. Companies
may not want to distribute their python code in source form. Even
though pyc files are one option, it gets inconvenient to distribute
bunch of them . If there is some way to bundle pyc files (akin to
.jar), it would be really nice. I understand that pyc files are not
hard to decompile (from my reading of previous posts) and module
startup times may be longer if they have to be read from an archive.
Neverthless, an option to distribute in the form of an archive is
attractive. Has this ever been considered for Python? If one were to
consider it, what would be pros and cons of such approach?

Any comments are appreciated.

Thanks,
Raghu.



From lee at example.com  Tue Apr 12 16:54:44 2005
From: lee at example.com (Lee Harr)
Date: Tue, 12 Apr 2005 20:54:44 GMT
Subject: PyChart into web site error
References: <425c0b61$0$10969$5fc30a8@news.tiscali.it>
Message-ID: <oAW6e.1070$eW7.115@news02.roc.ny>

On 2005-04-12, Michele Petrazzo <michele.petrazzo at TOGLIunipex.it> wrote:
> I'm using PyChart like a module for create charts into a little web
> site, but when I try to create one, I have this error:
>
> /var/www/html/lgt/draw.py:19, in draw:
> can = canvas.init(self.file_name)
> /usr/lib/python2.3/site-packages/pychart/canvas.py:60, in init:
> can = pngcanvas.T(fname)
> /usr/lib/python2.3/site-packages/pychart/pscanvas.py:25, in __init__:
> basecanvas.T.__init__(self)
> /usr/lib/python2.3/site-packages/pychart/basecanvas.py:70, in __init__:
> self.title = re.sub("(.*)\\.py$", "\\1", sys.argv[0])
>
> AttributeError: 'module' object has no attribute 'argv'
>
> Why my script doesn't have sys.argv?
>
> Is there another way to use PyChart into my script?
>


You are probably going to have to give more details.

Is there a file in your html/lgt folder called sys?

How are you serving the pages?


From me at privacy.net  Tue Apr 12 19:25:07 2005
From: me at privacy.net (Dan Sommers)
Date: 12 Apr 2005 19:25:07 -0400
Subject: Looking for a very specific type of embedded GUI kit
References: <Xns963695069E82Esizernospamcom@216.40.28.87>
Message-ID: <m2is2rwpbg.fsf@unique.fully.qualified.domain.name.yeah.right>

On 12 Apr 2005 16:38:05 -0500,
Sizer <sizer at nospam.com> wrote:

> So the question is: what non-X gui toolkit can we use that has Python
> bindings and will let us use a custom display driver at the lowest
> level? ...

Curses?

There's a HOWTO at <http://www.amk.ca/python/howto/curses/>.

HTH,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From apardon at forel.vub.ac.be  Thu Apr 14 05:59:48 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Apr 2005 09:59:48 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1793.1113334936.1799.python-list@python.org>
	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1818.1113375260.1799.python-list@python.org>
	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1823.1113383437.1799.python-list@python.org>
	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1860.1113432730.1799.python-list@python.org>
	<slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1881.1113466572.1799.python-list@python.org>
	<slrnd5sckl.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1883.1113471781.1799.python-list@python.org>
Message-ID: <slrnd5sfoj.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-14, Robert Kern schreef <rkern at ucsd.edu>:
> Antoon Pardon wrote:
>> Op 2005-04-14, Robert Kern schreef <rkern at ucsd.edu>:
>> 
>>>Antoon Pardon wrote:
>>>
>>>>Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>>>>
>>>>I would do that if I were just writing code I thought others could
>>>>find usefull. I then would feel no problem "burdening" those users
>>>>with the same kind of license I found in the product I took some
>>>>code from. But I also think that readers of documentation should
>>>>be free to use any code included in any way they see fit.
>>>
>>>If they have issues with distributing code derived from Python, why are 
>>>they reading a Python tutorial?
>> 
>> 
>> Try and look it from a students viewpoint. He is learing languages,
>> algorithms and so on. Now he is ready to write his own program.
>> Chances are high that he will rely on examples from the
>> courses/documentation he read. It is just not practical for someone
>> like that to figure out all the possible different licenses under
>> which he can use the examples from the various documenation sources.
>
> The PSF License is about as light as they come.
>
>> Now if this documentation refers to code from yet another source
>> with its own license, using it becomes an utter nightmare for
>> the student, because now he has to figure out which piece of
>> the code is original from the author of the documentation and
>> which was copied from the other source.
>
> Then write your own code and don't use anyone else's. You can't offer 
> extra permissions for code that's not yours.

Well then I'll just have to do that.

>> Consideration like this, let me come to the conclusion that
>> code included with documentation should come with no strings
>> attached for the students to reuse.
>
> No such thing, really. Copyright law requires almost as much as the PSF 
> license. The MIT license is shorter, possibly more easily 
> understandable, but practically amounts to more-or-less the same thing.

If I read a tutorial or a course on algorithms both with examples.
Does copyright law require that I attribute if I reuse code
from these examples? Even if it was pseudo code that I had
to translate in an actual language.

Suppose some time has passed and I have to write similar code.
I cant find the documentation but this time I'm experienced
enough so that I can recreate the code. Do I still need to
attribute the code?

What if the code is so short that basically everyone that
solves the problem writes the same kind of code?

> In short, don't worry about it. Don't sue people, keep the attributions 
> intact, and probably no one will care.

If they don't care, why did they attach such a license in the first
place.

-- 
Antoon Pardon


From radam2 at tampabay.rr.com  Sat Apr  2 09:29:08 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 14:29:08 GMT
Subject: Docorator Disected
Message-ID: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>


I was having some difficulty figuring out just what was going on with
decorators.  So after a considerable amount of experimenting I was
able to take one apart in a way.  It required me to take a closer look
at function def's and call's, which is something I tend to take for
granted.

I'm not sure this is 100%, or if there are other ways to view it, but
it seems to make sense when viewed this way.

Is there a way to do this same thing in a more direct way?  Like
taking values off the function stack directly.  How much of it get's
optimized out by the compiler?


#
#   Follow the numbers starting with zero.
#

# (0) Read defined functions into memory

def decorator(d_arg):     # (7) Get 'Goodbye' off stack
    
    def get_function(function): # (8) Get func object off stack
        
        def wrapper(f_arg):        # (9) Get 'Hello' off stack
            
            new_arg = f_arg+'-'+d_arg
            result = function(new_arg)  # (10) Put new_arg on stack
                                        # (11) Call func object
                                        
            return result          # (14) Return result to wrapper
        
        return wrapper        # (15) Return result to get_function
    
    return get_function    # (16) Return result to caller of func



@decorator('Goodbye')   # (5) Put 'Goodbye' on stack
                        # (6) Do decorator 

def func(s):            # (12) Get new_arg off stack

    return s            # (13) Return s to result

# (1) Done Reading definitions


print func('Hello')     # (2) Put 'Hello' on stack
                        # (3) Put func object on stack
                        # (4) Do @decorator
                        # (17) print 'Hello-Goodbye'

# Hello-Goodbye




From mensanator at aol.com  Mon Apr 18 18:55:16 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 18 Apr 2005 15:55:16 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<1113430615.592715.78440@f14g2000cwb.googlegroups.com>
	<slrnd5t1ii.rds.nick@irishsea.home.craig-wood.com>
	<1113495726.884203.326670@f14g2000cwb.googlegroups.com>
	<slrnd6742v.jak.nick@irishsea.home.craig-wood.com>
Message-ID: <1113864916.289406.172440@f14g2000cwb.googlegroups.com>


Nick Craig-Wood wrote:
> mensanator at aol.com <mensanator at aol.com> wrote:
> >  Nick Craig-Wood wrote:
> > > mensanator at aol.com <mensanator at aol.com> wrote:
> > > >  I'm using GMPY (see code).
> > > [snip]
> > >
> > > If you are using gmpy you might as well do it like this.....
> > >
> > > gmpy.pi() uses the Brent-Salamin Arithmetic-Geometric Mean
formula
> > > for
> > > pi IIRC.  This converges quadratically, and it will calculate you
a
> > > million places without breaking a sweat.
> >
> >  It would be nice if that were documented. What do I have to do, go
get
> >  the documentation for the original GMP to find out what else is in
GMPY
> >  that they didn't include in the doc file?
>
> "pydoc gmpy" works for me.  Not sure how you use pydoc on windows,
but
> you can do this...
>
> >>> import gmpy
> >>> help(gmpy)
> Help on module gmpy:
>
> NAME
>     gmpy
>
> FILE
>     /usr/lib/python2.3/site-packages/gmpy.so
> [snip]
> Help on built-in function pi:
>
> pi(...)
>     pi(n): returns pi with n bits of precision in an mpf object
> [snip]

Thanks, didn't know you could do that. And I'm glad you didn't reply
until today, because I learned how to do it the hard way:

>>> import gmpy
>>> f = dir(gmpy)
>>> def print_docs(f):
            for q in f:
                    if q[:2]=='__':
                             pass
                    else:
                             d = 'gmpy.' + q + '.__doc__'
                             e = eval(compile(d,'<string>','eval')
                             print e
                             print
>>> print_docs(f)


That's 3 new functions I learned, dir(), compile() and eval().
And now that I know help(), I'll probably never need them, but
hopefully will remember them.

Even better, I realize the inadequecy of the doc strings of a
program I wrote. Now that I know how to use them interactively,
I can make them more useful.

>
> The original gmp documentation is sensible also, since gmpy is really
> just a thin wrapper to it.

I already looked. Utterly useless.

> There is also the gmp source code too.

That helped, as there's a list of the function names in the source
code, but help() makes it unnecessary.

You still have to wonder, though, with as easy as this is, how the
gmpy documention ended up incomplete. I'm always reminded of something
I read in the National Lampoon:

"You know what a fuck-up you are at work, how would anything get
done if everyone was like you? Well, the sad fact is everyone _is_
just like you...including the air traffic controller who's supposed
to be tracking your flight but has just looked away because he
dropped a cigarette ash and burned a hole in his trousers..."

So I suppose I shouldn't complain, after all, I got something
positive out of it.

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



From deetsNOSPAM at web.de  Fri Apr  8 11:53:23 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 08 Apr 2005 17:53:23 +0200
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
Message-ID: <d369dj$9vs$04$1@news.t-online.com>

> 
> Is there a way to do something like that with dicts?

Not without searching the dict's items through, or keeping a additional
mapping between values and keys.

> 
> On a similar note, if one object is part of another, is there a way for
> the 'child' obj to discover what/who the 'parent' object is? That way
> parent does not have to be explicityly passed to get_parent_index?

No. 
-- 
Regards,

Diez B. Roggisch


From ville at spammers.com  Thu Apr 28 06:15:13 2005
From: ville at spammers.com (Ville Vainio)
Date: 28 Apr 2005 13:15:13 +0300
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
	<d4qb1m$59u$3@eeyore.INS.cwru.edu>
	<d4qbjb$7qf$1@eeyore.INS.cwru.edu>
Message-ID: <du7ekcvmclq.fsf@lehtori.cc.tut.fi>

>>>>> "Brian" == Brian Beck <exogen at gmail.com> writes:


    Brian> Okay, sorry for spamming the newsgroup so much, but I
    Brian> installed 0.9.3 properly and the same issues I mentioned
    Brian> before persist. Code completion for imports or locals don't
    Brian> work at all -- the space thing was PyDev just listing all
    Brian> the built-ins, with none of my modules or locals included
    Brian> in the list.

This is another thing that works fine for me. Have you tried starting
with an empty file to see whether there is something in your source
file that trips up pydev?

Whining at the pydev mailing list might work as well.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From exarkun at divmod.com  Tue Apr 26 14:08:20 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Tue, 26 Apr 2005 18:08:20 GMT
Subject: Coding Standards (and Best Practices)
In-Reply-To: <1114538687.21150@hqnntp01.autodesk.com>
Message-ID: <20050426180820.15422.1136315431.divmod.quotient.1841@ohm>

On Tue, 26 Apr 2005 14:04:45 -0400, Isaac Rodriguez <discussion.support at autodesk.com> wrote:
>Hi,
>
>I am fairily new to Python, but I am really liking what I am seeing. My team
>is going to re-design some automation projects, and we were going to use
>Python as our programming language. One of the things we would like to do,
>since we are all new to the language, is to define a set of guidelines and
>best practices as our coding standards.
>
>Does anyone know where I can get some information about what the community
>is doing? Are there any well defined guidelines established?
>

  One such document:

    http://python.org/peps/pep-0008.html

  Jp


From onurb at xiludom.gro  Fri Apr 22 06:27:48 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 22 Apr 2005 12:27:48 +0200
Subject: Persistent python object and the Web
In-Reply-To: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
References: <1114107302.827987.230560@l41g2000cwc.googlegroups.com>
Message-ID: <4268d1a5$0$28534$626a14ce@news.free.fr>

ramon.aragues at gmail.com wrote:
> Hi,
> 
> I'd like to know if I am trying to do something impossible or I am just
> being unable to find how to do it. In the latter case, please... help
> me...
> 
(snip)
 >
> My problem is that I don't know how to create a graph_object that
> remains persistent through time (it has to be the same graph_object for
> the first command as for the last one "pushed" by the user). I want to
> be able to create the object when the user enters the web page (by
> calling graph_object = Graph(id="graph1")) and then make calls to
> graph_object methods when the user pushes a button.
> 
> I'm using python2.3, mod_python and Apache.
> 
You may want to have a look at ZODB - the Zope object database. It has 
been developped for Zope, but can be used without.

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


From mstepnicki at gmail.com  Tue Apr  5 18:59:25 2005
From: mstepnicki at gmail.com (=?iso-8859-2?q?Marcin_St=EApnicki?=)
Date: Wed, 06 Apr 2005 00:59:25 +0200
Subject: Installing Python 2.4 on Linux
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
Message-ID: <pan.2005.04.05.22.59.24.557828@gmail.com>

Dnia Tue, 05 Apr 2005 21:21:37 +0000, Edward Diener napisal(a):

> I can install Python 2.4 on the Fedora 3 Linux system, but after I do a 
> number of Linux utilities and commands, like yum, stop working because 
> they were dependent on the Python 2.3 installation. What happens is that 
> Python 2.4 replaces the /usr/bin/python module with the Python 2.4 
> version. If I replace /usr/bin/python with the Python 2.3 version 
> executable, which is still on my system, that all the aforesaid modules 
> depend on, they start working again, but I can no longer execute 
> modules, like IDLE, which was part of my Python 2.4 distribution.
> 
> What is the solution to this ? The operating system was installed with 
> Python 2.3 and the development libraries but no tools, doc, or 
> otherwise. I have installed Python 2.4 with all the RPMs and copied down 
> the Python 2.4 documentation to my machine ( since python24-docs.rpm 
> gives one very little ). I would naturally like to use Python 2.4 
> without killing all the commands that depend on Python 2.3. No doubt 
> these commands have their modules in the site libraries for Python 2.3. 
> Of course I would love to update these dependencies to use Python 2.4 
> but newer RPMs for these commands do not exist.
> 
> I do not know whether this is a Python problem or a Fedora 3 problem but 
> I thought I would ask here first and see if anybody else had the same 
> problem. I imagine the problem might exist on other Linux systems.

It's rather Fedora related, I have Python 2.2, 2.3 and 2.4 on my Ubuntu
box and they seem to coexist without problems.

If you can afford breaking package dependencies a bit, save a copy of
python2.3 binary somewhere and recreate it after installing Python 2.4,
OR make a symbolic link /usr/bin/python to /usr/bin/python2.3 and use
/usr/bin/python2.4 explicitely when you want to use the newer version. You
may also try to link modules from /usr/lib/python2.3/site-packages to
/usr/lib/python2.4/site-packages (all or just few of them) - most should
be upwards compatible. It may make Fedora utilities work again
(you haven't provided error messages, so it's hard to tell) even with
Python 2.4.

-- 
   Przed siebie idziesz i zabijasz      | http://apcoln.linuxpl.org 
 Nic nie czujac w serce sztylet wbijasz | http://biznes.linux.pl
----------------------------------------| http://www.juanperon.info
     JID: Aragorn_Vime at jabber.org       | http://www.naszedzieci.org



From mage at mage.hu  Sat Apr 23 14:13:24 2005
From: mage at mage.hu (Mage)
Date: Sat, 23 Apr 2005 20:13:24 +0200
Subject: Python or PHP?
In-Reply-To: <d4e12i$u1s$1@sea.gmane.org>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org><IFEpEp.7Gz@bath.ac.uk>	<426A76A5.2050906@mage.hu>
	<d4e12i$u1s$1@sea.gmane.org>
Message-ID: <426A9044.4020502@mage.hu>

Fredrik Lundh wrote:

>
>sql injection?  what's your excuse for not using data binding?
>  
>
I am not sure I truly understand your question.
So far my own servers didn't get successful sql injection attack. I just
saw some on other sites and did one for demonstration.

Avoid them is easy with set_type($value,"integer") for integer values
and correct escaping for strings.

However, php programmers usually don't initialize their variables
because they don't have to do. They even turn off warnings and errors.
Our php errorlog at my full time working company is so huge I could cry.
We have php-copypasters.
I don't know anyone IRL who uses python. So I started to learn it.

       Mage




From michele.simionato at gmail.com  Mon Apr 25 14:05:31 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 25 Apr 2005 11:05:31 -0700
Subject: ACCU Conference (PyUK) 2005
In-Reply-To: <1114442474.770008.238600@o13g2000cwo.googlegroups.com>
References: <1114442474.770008.238600@o13g2000cwo.googlegroups.com>
Message-ID: <1114452331.924006.285370@l41g2000cwc.googlegroups.com>

The previous post was getting too long, so I decided to put my
impressions on the technical talks here. You may also want to
read what our chairman Andy Robinson has to say:
http://www.reportlab.org/~andy/accu2005/accu2005.html
There you can find the materials of the conference (slides etc.)

ACCU Conference (PyUK) 2005: a personal view (part 2)
=======================================================

I am definitely a technical person (as opposed to a marketing person)
so what impressed me the most were the presentations by Armin Rigo.

He gave two presentations: the official one, about the PyPy project,
and
a lightening talk about greenlets. Of course, I had heard something
about these topics previously, but it is pretty different to see a live
demonstration. Armin shown us really *impressive* stuff.

Basically, PyPy is already there and it is working! He explained us
the idea behind just-in-time compilation (which is actually quite
simple),
type inference at work, as well as other really impressive stuff, such
as sharing an object through an Internet connection (!)

The only problem with PyPy as it is now, is that it runs on top of
traditional Python and it is terribly slow. Nevertheless, Armin says
that it can be made fast and actually faster than current Python.
If any other guy would have made the same claim I would have been
skeptical, but Armin is the person who gave us Psyco, so I am forced to

take him seriously. And the other persons working full time on the
project have names such as Christian Tismer, Samuele Pedroni,
Holger Krekel, etc. As reported by Jacob Hallen, Guido himself has
great hopes for the project and Tim Peters would have liked to work
full time on PyPy.

The European Community founded the project for 1,300,000+ Euros in two
years. So there is money to join the project and to cover travel
expenses,
if you are an Europen citizen. If you are no EU member,
things are more complicated from the burocratical point
of view. If somebody knows how to turn around the
restrictions and to get some money for non-EU nationalities,
I am sure Jacob Hallen would be happy to know.

Jacob Hallen is in charge of the organization of the
sprints and of some of the burocratical part. He looks
like he is doing a pretty good job. Of course his firm,
the Strakt, has a very strong and direct interest in the
project. It is worth repeating that Alex Martelli worked for Strakt,
that Laura Chreighton is there as well, and that recently
they hired Samuele Pedroni of Jython fame. So, it looks
like they are really doing a LOT for Python in Europe.

On my part, I have resolved to keep a close eye on the
development in http://codespeak.net, since there is really
cool stuff in there, and really innovative ideas. It is
unfortunate that most of the stuff is still under SVN
and not easy available to the average Joe User, even if
there are plenty of things that would be useful to the average
Joe User, such as py.test (I would not talk about py.test since
it has been discussed elsewhere pretty well, but I definitely
like it a lot).

I certainly hope that part of this very substantial effort will go back

into the standard library someday.

It is interesting to notice that Armin and I were the two speakers to
use non-traditional presentation materials.

Whereas I have just shown simple HTML slides generated by a hand-cooked
Python script, he made a very effective usage of Pygame, so you
got the impression type inference was as easy as playing PacMan.
His presentation is available for download, at the reportlab link
I mentioned before, so everybody can see it. Armin also used GraphViz
to
plot the output of PyPy type-inferencer (I am not sure of the right
term
to use here, just as I am not sure of what "interpreter" and "compiler"
means anymore) and he got really nice-looking results. I am a
known evangelist of the "dot" language,
http://www.linuxdevcenter.com/pub/a/linux/2004/05/06/graphviz_dot.html,
so I very much liked the approach.

It is also fun to notice that both Armin's and my talk were
the two metacircular talks of the conference: Armin was talking about
implementing a programming language using itself as implementation
language (let me remind that PyPy stands for Python in Python) whereas
I presented a web application to demonstrate doctest which was used to
doctest itself.

Well, that's all for the moment. I have written enough for today, now
it is time to start playing with greenlets. They are extremely cool,
I don't know where I want to use them yet, but I am pretty sure I'll
figure out something eventually ;)


                 Michele Simionato



From eldiener_no_spam_here at earthlink.net  Sat Apr  2 15:20:05 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Sat, 02 Apr 2005 20:20:05 GMT
Subject: Name of IDLE on Linux
In-Reply-To: <mailman.1242.1112466945.1799.python-list@python.org>
References: <mailman.1242.1112466945.1799.python-list@python.org>
Message-ID: <V7D3e.2366$44.1509@newsread1.news.atl.earthlink.net>

Jim Benson wrote:
> On Sat, 2 Apr 2005, Edward Diener wrote:
> 
> 
>>What is the name of the IDLE program on Linux and where is it installed 
>>in a normal Linux distribution ? I have installed all the Python 2.3.5 
>>RPMs on my Fedora 3 system but I have no idea where they are installed 
>>or what IDLE is called. I lloked in the Python web pages to try to find 
>>a list of the files in the various installations, but was unable to find 
>>the information.
>>
> 
> 
> Try idle (all lower case). 
> On my RH-9 system it is in /usr/local/bin

Thanks. The system came with Python and the development libraries but 
not with the latest installation and tools. Once I was able to install 
all the latest Python RPM for Fedora 3, 'idle' showed up. Now all I have 
to do is find everything else, including the latest documentation files. 
It is a pity the Python Linux binary installations do not create folders 
on the desktop or in the Gnome menu system with links to the Python to 
the documentation and a readme telling me what executables were installed.


From fredrik at pythonware.com  Tue Apr 12 06:36:33 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 12:36:33 +0200
Subject: Overlapping matches in Regular Expressions
References: <d3g7ih$21uf$1@news.uit.no>
Message-ID: <d3g85q$ors$1@sea.gmane.org>

Andr? S?reng wrote:

> With the re/sre module included with Python 2.4:
>
> pattern = "(?P<id1>avi)|(?P<id2>avi|mp3)"
> string2match = "some string with avi in it"
> matches = re.finditer(pattern, string2match)
> ...
> matches[0].groupdict()
> {'id2': None, 'id1': 'avi'}
>
> Which was expected since overlapping matches are ignored.
> But I would also like to know if other groups had a match.

that's not how regular expressions work: a regular expression describes a
set of strings (the regular set), and the engine can tell you if a given string
belongs to that set.

> What modifications to the re/sre module is needed to allow
> overlapping matches?

if you want overlapping matches, you have to apply the pattern multiple
times.  for trivial cases like your example, it's probably easier to create a
single pattern that matches all interesting cases, and use a dictionary (or
a number of sets) to do the rest.

</F> 





From asmundg at stud.cs.uit.no  Fri Apr  8 17:55:44 2005
From: asmundg at stud.cs.uit.no (=?ISO-8859-1?Q?=C5smund_Grammeltvedt?=)
Date: Fri, 8 Apr 2005 23:55:44 +0200 (CEST)
Subject: Ply(LALR) and Yacc behaving differently
In-Reply-To: <1112981416.26943.21.camel@dot.uniqsys.com>
Message-ID: <Pine.LNX.4.44.0504082344340.19462-100000@lgserv3.stud.cs.uit.no>

On Fri, 8 Apr 2005, Carsten Haese wrote:

> On Thu, 2005-04-07 at 14:51, ?smund Grammeltvedt wrote:
> > Hi.
> > 
> > I am trying to implement a small compiler in python and, trying to use 
> > something a bit more pythonic than lex/yacc, ended up with ply 
> > (http://systems.cs.uchicago.edu/ply/). The only problem is that whereas 
> > yacc accepts the grammar and appears to parse it correctly, ply does not.

> Maybe this is a PLY bug? LALR(1) support appears to be a relatively
> recent addition to PLY. Have you tried contacting PLY's author?
>
> For what it's worth, it appears that you can make your example grammar
> work in LALR-mode PLY by eliminating the empty production and making the
> Block rule right recursive like this:

> Of course, I don't know whether this rewrite is applicable to your
> larger grammar.

Unfortunately, it is not. Fortunately, I tried PyBison as a replacement 
and everything worked perfectly. So I suspect, as you said, that this is a 
bug with PLY's LALR(1) implementation.

Thanks for the help.

-- 
?smund Grammeltvedt

Are you infringing, citizen? | webshop.ffii.org/



From fabio.pliger at siavr.it  Sat Apr  9 04:31:09 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Sat, 09 Apr 2005 08:31:09 GMT
Subject: check instace already running...
Message-ID: <hpM5e.36121$IN.685498@twister2.libero.it>

Hi,
is it possibile, in python, to check for an already running instance of an
application?
My problem is that, if my program i running and the user relaunch it, i
don't want to open a new instance and have to instances of the same program
running togheter...
Can someone help me on this?
Fabio P.




From reinhold-birkenfeld-nospam at wolke7.net  Fri Apr 22 09:47:44 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Fri, 22 Apr 2005 15:47:44 +0200
Subject: goto statement
In-Reply-To: <116fhmd75m1a00a@corp.supernews.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
	<116fbo3pma1lsdb@corp.supernews.com> <d48eov$ddn$2@n6.co.ru>
	<116fg649v5rsf14@corp.supernews.com> <d48g6q$f66$1@n6.co.ru>
	<116fhmd75m1a00a@corp.supernews.com>
Message-ID: <3csdntF6p6jpnU3@individual.net>

Grant Edwards wrote:
> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> 
>>>>>> Well, I'm writing for embedded realtime systems in C/C++ and
>>>>>> have never encountered a single need to use goto.
>>>>> 
>>>>> I have encountered situations in C programs where the best
>>>>> thing to use was a goto.  Those situations have always been
>>>>> handled beutifully by a "raise" in Python.
>>>>
>>>> setjmp/longjump?
>>> 
>>> I've always found setjmp/longjmp much more confusing and hard
>>> to maintain than a simple goto.  It also requires library
>>> support that goto doesn't.
>>
>> Agreed. The 'goto error' idiom is in fact the only goto usage
>> I do agree with provided there is no support for exceptions,
>> but that's not applicable to Python anyway.
> 
> Exactly.  I've been writing C code for 20+ years, and the only
> problems where I found goto to be a good solution are the ones
> where exceptions are even better solutions in Python.  I've
> never found myself wishing for a goto when writing Python code.

The Python C source code is full of such gotos, it must be good
practise...

Reinhold


From mahs at telcopartners.com  Fri Apr 22 18:33:34 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 22 Apr 2005 15:33:34 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114208333.622909.179640@l41g2000cwc.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>
Message-ID: <d4btq5$77s$1@sea.gmane.org>

mehmetmutigozel at gmail.com wrote:
> Thanx for your replies.
> 
> I'm looking for array of functions.
> Something like a=[ sin(x) , cos(x) ]
> 
> 
>>>>x=0.0
>>>>a
> 
> [0, 1]
> 
>>>>x=1.0
>>>>a
> 
> ...
> 
> of course it can be made by
> 
>>>>def cratearray(x):
> 
> ...           ~~~~
> ...           return a
> a=createarray(1.0)
> 
> but this isn't what i am asking for. something automized.
> 
Still, guessing, but perhaps this:

  >>> def make_func_map(*funcs):
  ...     def f(x):
  ...         return [func(x) for func in funcs]
  ...     return f
  ...
  >>> from math import sin, cos, pi
  >>> a = make_func_map(sin, cos)
  >>> a(0)
  [0.0, 1.0]
  >>> a(pi)
  [1.2246063538223773e-016, -1.0]
  >>>

Michael



From bokr at oz.net  Sat Apr  2 17:24:12 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 02 Apr 2005 22:24:12 GMT
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
	<prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>
	<d2mqcl$r6t$02$1@news.t-online.com>
Message-ID: <424f1748.142675386@news.oz.net>

On Sat, 02 Apr 2005 21:04:57 +0200, "Diez B. Roggisch" <deetsNOSPAM at web.de> wrote:

>> I followed that part.  The part that I'm having problems with is the
>> first nested function get's the argument for the function name without
>> a previous reference to the argument name in the outer frames. So, a
>> function call to it is being made with the function name as the
>> argument, and that isn't visable so it looks as if it's magic.
>
>No, its not - but I stepped into that trap before - and thought its magic :)
>
>The trick is to know that
>
> - a decorator is a callable
Strictly speaking, UIAM "deco" in @deco is a non-general
very-limited-syntax expression that should evaluate to a callable.
> - get passed a callable
> - has to return a callable

That last is a "should" ;-) Actually, you can abuse the def just
to provide a binding name whose associated function is otherwise ignored
(other than syntax check and compilation ), e.g.,

 >>> def maverick(f): return 'maverick'
 ...
 >>> @maverick
 ... def foo(): pass
 ...
 >>> foo
 'maverick'

Or

 >>> @str
 ... def foo(): pass
 ...
 >>> foo
 '<function foo at 0x02EE8D14>'

Note the quotes ;-)

 >>> type(foo)
 <type 'str'>

Just being picky about absolute statements ;-)

Regards,
Bengt Richter


From postmaster at castleamber.com  Sat Apr 23 18:37:06 2005
From: postmaster at castleamber.com (John Bokma)
Date: 23 Apr 2005 22:37:06 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
Message-ID: <Xns9641B33152AA6castleamber@130.133.1.4>

Mike Meyer wrote:

> "Simon John" <simoninusa2001 at yahoo.co.uk> writes:
> 
>> I still love Perl, it's a bit of an art form, as "there's more than
>> one way to do it", whereas Python usually only allows one way to do
>> it, which may or may not be a better mantra....
> 
> The Python mantra leads to 1) less programmer overhead, and 2) faster
> improvements in the language.
> 
> To be a Perl expert, you have to know which of the many ways to do
> various things is the fasted under what conditions.

Why?

> Python programmers
> seldom have to worry about that - there's usually only one [obvious]
> way to do things, so you just do it that way.

I doubt that :-D. I have never seen a programming language that forced
me in such a way :-D. 

> Having only one obvious way

I doubt that too ;-)

> to do things means developers only have to
> worry about impact on that way when making improvements, which will
> speed them up.

Yeah, Perl programmers are extremely slow ;-)

> The problem these days is that there are now multiple ways to do a
> variety of things, because we have the "new, pythonic" way and the
> "old, backwards-compatible way". So it's no longer clear which is the
> fastest -

In most cases, why worry? If speed is an issue you should probably have
picked a different programming language in the first place (for that
part of the code). 

> and in the case of generators versus list comprehensions,
> it's not clear which you should be using. To bad.

Use the one that is the easiest to read and understand by yourself.
That's how I program Perl, and that's how I am going to program Python. 

An overloaded toolbox doesn't mean that if you have to hang a painting
on the wall that you have to think for 6 hours which tool you should
use. You just take the one that does the job in a way you feel
comfortable with. I know that the Perl mantra is often misunderstood,
but in my experience only by people who have very little experience with
the language. 

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


From jared.kuolt at gmail.com  Fri Apr  8 17:29:40 2005
From: jared.kuolt at gmail.com (SuperJared)
Date: 8 Apr 2005 14:29:40 -0700
Subject: Exception Handling
Message-ID: <1112995780.656492.18540@o13g2000cwo.googlegroups.com>

I'm new to Python, well versed in PHP and a bit of Perl.

I've written a simple backup utility that FTPs from one server to
another. I'd like to implement exception handling on the FTP should
someting go wrong.

This is basically what I have so far:


try:
   ftp = FTP(ftp_host, ftp_user, ftp_pass)
   ftp.storbinary('STOR ' + filename, pointer)
   ftp.close()
except:
   # do something with an error message here...?


I'd like to use 'all_errors' but I don't know how! Will I have to
create a handler for each other exception?



From grante at visi.com  Mon Apr  4 21:20:08 2005
From: grante at visi.com (Grant Edwards)
Date: Tue, 05 Apr 2005 01:20:08 -0000
Subject: How to merge two binary files into one?
References: <mailman.1340.1112663541.1799.python-list@python.org>
Message-ID: <1153pu8pvom6b02@corp.supernews.com>

On 2005-04-05, could ildg <could.net at gmail.com> wrote:

> I want to merge file A and file B into a new file C, All of
> them are binary.

file('C','wb').write(file('A','rb').read()+file('B','rb').read())

-- 
Grant Edwards                   grante             Yow!  ... or were you
                                  at               driving the PONTIAC that
                               visi.com            HONKED at me in MIAMI last
                                                   Tuesday?


From bokr at oz.net  Tue Apr  5 21:33:06 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 06 Apr 2005 01:33:06 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
	<ixt3e.1907$7b.368@trndny01> <424e73a3.100782477@news.oz.net>
	<roy-9BA12E.08481802042005@reader1.panix.com>
	<m3r7hp5njr.fsf@pc150.maths.bris.ac.uk>
Message-ID: <42533b7c.414087696@news.oz.net>

On Tue, 5 Apr 2005 14:02:49 GMT, Michael Hudson <mwh at python.net> wrote:

>Roy Smith <roy at panix.com> writes:
>
>> In article <424e73a3.100782477 at news.oz.net>, bokr at oz.net (Bengt Richter) 
>> > Is there a package that is accessible without svn?
>> 
>> That seems to be its weak point right now.
>> 
>> Fortunately, you can get pre-built svn clients for many platforms 
>> (http://subversion.tigris.org/project_packages.html#binary-packages), and 
>> from there you just have to run a single command (svn get URL).
>
>wget -r should work fine!
>
If you'll bear with my laziness, what should replace "should work fine!" in that?
TIA

Regards,
Bengt Richter


From rbt at athop1.ath.vt.edu  Thu Apr  7 15:27:14 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Thu, 07 Apr 2005 15:27:14 -0400
Subject: Distributing Python Apps and MySQL
In-Reply-To: <1112887332.324949.318960@z14g2000cwz.googlegroups.com>
References: <1112887332.324949.318960@z14g2000cwz.googlegroups.com>
Message-ID: <d341ij$lud$1@solaris.cc.vt.edu>

dcrespo wrote:
> Hi there... I want to distribute my python apps and the MySQL Database
> in the easiest way possible. I mean a user just run the installation
> file and all is automaticly installed. Any suggestions?
> 
> My knowledge: I know, as many of you, that there's py2exe for compiling
> python apps for running under Windows. But what about the database
> structure and data? I think it could be reached through a .qry run in
> the MySQL database from an installation instruction. But (one more
> time) what about the automated installation of the MySQL database
> without user intervention?
> 
> Daniel Crespo
> 

I don't think one can distribute mysql within a software package w/o 
buying a commercial license to do so. Check out their licensing on their 
website here:

"When your application is not licensed under either the GPL-compatible 
Free Software License as defined by the Free Software Foundation or 
approved by OSI, and you intend to or you may distribute MySQL software, 
you must first obtain a commercial license to the MySQL product."

http://www.mysql.com/company/legal/licensing/commercial-license.html


From polykrombelcentercom  Sat Apr 30 13:44:42 2005
From: polykrombelcentercom (Zoool (at dot))
Date: Sat, 30 Apr 2005 19:44:42 +0200
Subject: [Py Windows] User Directory Path
Message-ID: <IKGdnQt3ufCXWe7fRVnyuQ@scarlet.biz>

Hi,

Is there a way to know the main directory path of a user session?
I mean the "C:\Documents and Settings\username" Directory of the user logged 
into a windows session.
In .NET you can do this with a :
System.Environment.GetEnvironmentVariable("HOMEDRIVE")
System.Environment.GetEnvironmentVariable("HOMEPATH")

Maybe it's a stupid question that was already answered.. but can't anything 
on archives..

thanks a lot

Ben 




From Daniel.Cer at gmail.com  Sun Apr 24 23:31:51 2005
From: Daniel.Cer at gmail.com (Daniel Cer)
Date: Sun, 24 Apr 2005 21:31:51 -0600
Subject: Multiple tuples for one for statement
In-Reply-To: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
Message-ID: <426C64A7.9000209@gmail.com>

Harlin Seritt wrote:
> I have three tuples of the same size: tup1, tup2, tup3
> 
> I'd like to do something like this:
> 
> for a,b,c in tup1, tup2, tup3:
>    print a
>    print b
>    print c
> 
> Of course, you get an error when you try to run the pseudocode above.
> What is the correct way to get this done?

For something like this, you can use izip from itertools to package 
things up.

e.g. a working version of the code you posted using izip would be:

import itertools

tup1 = (1, 2, 3)
tup2 = (4, 5, 6)
tup3 = (7, 8, 9)

for a,b,c in itertools.izip(tup1, tup2, tup3):
    print "a: %d b: %d c: %d" % (a, b, c)

This outputs:

a: 1 b: 4 c: 7
a: 2 b: 5 c: 8
a: 3 b: 6 c: 9

-Dan


From hoel at gl-group.com  Tue Apr 19 10:53:58 2005
From: hoel at gl-group.com (=?iso-8859-15?q?Berthold_H=F6llmann?=)
Date: Tue, 19 Apr 2005 16:53:58 +0200
Subject: modules and namespaces
References: <4265027C.2090104@mage.hu>
	<mailman.2097.1113916875.1799.python-list@python.org>
Message-ID: <sepswqkebd.fsf@pc047299.dhcp.germanlloyd.org>

Laszlo Zsolt Nagy <gandalf at geochemsource.com> writes:

>>However it doesn't work until I import the string module into m1 and m2
>>modules. I found in the manual that imported modules will be searched in
>>the container module first. Is it more efficient to import the string
>>module into main and m1 and m2 than importing only into m1 and m2?
>>
>>
> I bet the most efficient is

But is is not working.

> str.join( ('a','b'))

Python 2.4.1 (#1, Mar 31 2005, 09:19:04) 
[GCC 3.2.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> str.join(('a','b'))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: descriptor 'join' requires a 'str' object but received a 'tuple'
>>> str.join('a','bcdefg')
'bacadaeafag'
>>> str().join(('a','b'))
'ab'

Kind regards
Berthold
-- 
hoel at GL-Group.com              __   Address:
                            G /  \ L Germanischer Lloyd
phone: +49-40-36149-7374    -+----+- Vorsetzen 35       P.O.Box 111606
fax  : +49-40-36149-7320      \__/   D-20459 Hamburg    D-20416 Hamburg


From codecraig at gmail.com  Fri Apr 15 10:07:13 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 07:07:13 -0700
Subject: Get OS name
In-Reply-To: <425FC7F6.8040405@athop1.ath.vt.edu>
References: <1113572595.889597.206690@g14g2000cwa.googlegroups.com>
	<425FC7F6.8040405@athop1.ath.vt.edu>
Message-ID: <1113574033.787739.318840@o13g2000cwo.googlegroups.com>

i guess i wanted the result in a nice string like Windows XP instead of
5.1

i guess i'll have to convert it myself, thanks



From ods at strana.ru  Thu Apr 21 10:36:01 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 21 Apr 2005 18:36:01 +0400
Subject: deprecation of has_key?
In-Reply-To: <426775C8.3000303@holdenweb.com>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>
	<426775C8.3000303@holdenweb.com>
Message-ID: <20050421183601.230b65c6.ods@strana.ru>

On Thu, 21 Apr 2005 05:43:36 -0400 Steve Holden wrote:

SH> Two words: backward compatibility. To lose that method now would
SH> break thousands of existing programs.
[...]
SH> The method might disappear in Python 3.0, when we will be allowed to
SH> break backward compatibility - you are correct in saying it's no
SH> longer necessary.

I believe it's a bad idea to remove this method, since behavior of both
"item in dict" and "for item in dict" (especially the later) in Python
does't seem sane to me.  Just look at reverse operations:

dict.fromkeys(seq) <-> d.keys(), d.iterkeys() - OK
dict(iterable) <-> d.iteritems()              - why not iter(d)?
dict(l) <-> d.items()                         - why not list(d)?
dict(seq) <-> d.keys(), d.iterkeys()          - looks very strange.

And those ("item in dict" and "for item in dict") are related of course,
since the following should pass:

for item in d:
    assert item in d

That's the reason why I always prefer to use has_key() and iteritems()
to in and iter().  Readability counts.

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From rkern at ucsd.edu  Wed Apr 20 14:08:02 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 20 Apr 2005 11:08:02 -0700
Subject: goto statement
In-Reply-To: <vu4d6151aqk22ug97147sg7e6prikcjt68@4ax.com>
References: <mailman.2158.1113989043.1799.python-list@python.org>
	<vu4d6151aqk22ug97147sg7e6prikcjt68@4ax.com>
Message-ID: <d465ht$itb$1@sea.gmane.org>

Matt Feinstein wrote:
> On Wed, 20 Apr 2005 10:23:58 +0100 (BST), praba kar
> <prabapython at yahoo.co.in> wrote:
> 
> 
>>Dear All,
>>
>>  In Python what is equivalent to goto statement
> 
> 
> I'd like to that implemented in an interpreted language. Requires some
> time travel.

Yes, to 2004-04-01.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From escalation746 at yahoo.com  Mon Apr  4 11:29:19 2005
From: escalation746 at yahoo.com (robin)
Date: Mon, 04 Apr 2005 16:29:19 +0100
Subject: TOC of Python Cookbook now online (was Re: author index for
	Python Cookbook 2?)
References: <pan.2005.03.28.22.57.26.701125@dalkescientific.com>
	<1112088046.319458.283220@o13g2000cwo.googlegroups.com>
	<mailman.1000.1112088412.1799.python-list@python.org>
	<1112198902.605404.233130@l41g2000cwc.googlegroups.com>
	<1112211408.135697.223430@o13g2000cwo.googlegroups.com>
Message-ID: <88n2515ki5j1b251uvak5s3dg769mtfvua@4ax.com>

beliavsky at aol.com wrote:

>I emailed the O'Reilly webmaster, and the table of contents are now
>online at http://www.oreilly.com/catalog/pythoncook2/toc.html and also
>listed below.

Unfortunately there is no list of authors for the sections in the
book. This is likely its only shortcoming!

-- robin


From dccarson at gmail.com  Thu Apr 14 10:08:00 2005
From: dccarson at gmail.com (dccarson at gmail.com)
Date: 14 Apr 2005 07:08:00 -0700
Subject: smtplib does not send to all recipients
In-Reply-To: <mailman.1859.1113430962.1799.python-list@python.org>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>
	<mailman.1715.1113251652.1799.python-list@python.org>
	<1113421803.445281.3660@l41g2000cwc.googlegroups.com>
	<mailman.1859.1113430962.1799.python-list@python.org>
Message-ID: <1113487680.752215.194840@l41g2000cwc.googlegroups.com>

OK, I've discovered the lost messages, but I'm still slightly confused
as to why they ended up there.  The messages were being delivered to
the local machine, box1.domain.com, even though I was addressing them
to <user>@domain.com.

My past experience with smtp mail has been that if I addressed the
domain explicitly, the mail would not stop at the local machine.  This
is in fact why the 'mail' utility is working.  If I use 'mail' to mail
something to <user> with no domain, it goes to the local machine, as I
would expect, but addressed to <user>@domain.com, it goes to the
corporate server.

So why does smtplib deliver to box1.domain.com?  If the local smtp at
box1.domain.com is configured such that this is correct behavior, I
guess I'd expect the 'mail' utility to do the same thing when handling
address <user>@domain.com.

By the way, the long vs. short usernames was a red herring.  Those with
.forward files were getting their mail.



From bokr at oz.net  Wed Apr 27 01:58:07 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 27 Apr 2005 05:58:07 GMT
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net><mailman.2498.1114482620.1799.python-list@python.org>	<7Ujbe.647694$w62.444038@bgtnsc05-news.ops.worldnet.att.net>
	<d4lskp$veq$1@sea.gmane.org>
	<mailman.2528.1114536542.1799.python-list@python.org>
Message-ID: <426f19eb.13402131@news.oz.net>

On Tue, 26 Apr 2005 10:26:51 -0700, Michael Spencer <mahs at telcopartners.com> wrote:

>Terry Reedy wrote:
>> "Charles Krug" <cdkrug at worldnet.att.net> wrote in message 
>> news:7Ujbe.647694$w62.444038 at bgtnsc05-news.ops.worldnet.att.net...
>> 
>>>Both of these techniques look promising here.
>> 
>> 
>> Here a third, the closure approach (obviously not directly tested):
>> 
>> 
>> 
>Just for grins, here's a fourth approach, using the descriptor protocol
>
>  >>> def func_with_state(state,a):
>  ...     state.append(a)
>  ...     return state
>  ...
>  >>> f = func_with_state.__get__([])
>  >>> f(1)
>  [1]
>  >>> f(2)
>  [1, 2]
>  >>> f(3)
>  [1, 2, 3]
>  >>>
>
For those who don't recognize it, this is the mechanism that binds instances to
methods of their type to make bound methods. It's as if you had given list a
new method and picked up the bound method from an instance like [].func_with_state

 >>> def func_with_state(state, a):
 ...     state.append(a)
 ...     return state
 ...
 >>> f = func_with_state.__get__([])
 >>> f
 <bound method ?.func_with_state of []>

The '?' is because we didn't supply the second argument to __get__, i.e., type([])

 >>> f = func_with_state.__get__([], list)
 >>> f
 <bound method list.func_with_state of []>

 >>> f.im_func
 <function func_with_state at 0x02EFD614>
 >>> func_with_state
 <function func_with_state at 0x02EFD614>


For grins, here's a fifth approach (I'm assuming you counted correctly to the fourth ;-)

 >>> from ut.presets import presets
 >>> @presets(state=[])
 ... def f(a):
 ...     state.append(a)
 ...     return state
 ...
 >>> f(1)
 [1]
 >>> f(2)
 [1, 2]
 >>> f(3)
 [1, 2, 3]

This is a straight function, with byte-code hack preset of internal state as specified.
The disassemby shows [1, 2, 3] because that is the object referred to still. What would have
been a global reference got hacked to LOAD_FAST 1 (state) after preset from "constant".

 >>> import dis
 >>> dis.dis(f)
   1           0 LOAD_CONST               1 ([1, 2, 3])
               3 STORE_FAST               1 (state)

   3           6 LOAD_FAST                1 (state)
               9 LOAD_ATTR                1 (append)
              12 LOAD_FAST                0 (a)
              15 CALL_FUNCTION            1
              18 POP_TOP

   4          19 LOAD_FAST                1 (state) 
              22 RETURN_VALUE

To see the initial state, we have to re-decorate another instance of f:
 >>>
 >>> @presets(state=[])
 ... def f(a):
 ...     state.append(a)
 ...     return state
 ...
 >>> dis.dis(f)
   1           0 LOAD_CONST               1 ([])
               3 STORE_FAST               1 (state)

   3           6 LOAD_FAST                1 (state)
               9 LOAD_ATTR                1 (append)
              12 LOAD_FAST                0 (a)
              15 CALL_FUNCTION            1
              18 POP_TOP

Of course, we could put this inside a factory and pass the desired state

 >>> def factory(state):
 ...     @presets(state=state)
 ...     def f(a):
 ...         state.append(a)
 ...         return state
 ...     return f
 ...
 >>> f2 = factory([111,222])
 >>> f2('third')
 [111, 222, 'third']
 >>> dis.dis(f2)
   2           0 LOAD_CONST               1 ([111, 222, 'third'])
               3 STORE_FAST               1 (state)

   4           6 LOAD_FAST                1 (state)
               9 LOAD_ATTR                1 (append)
              12 LOAD_FAST                0 (a)
              15 CALL_FUNCTION            1
              18 POP_TOP

   5          19 LOAD_FAST                1 (state)
              22 RETURN_VALUE
 >>> dis.dis(factory('append will fail'))
   2           0 LOAD_CONST               1 ('append will fail')
               3 STORE_FAST               1 (state)

   4           6 LOAD_FAST                1 (state)
               9 LOAD_ATTR                1 (append)
              12 LOAD_FAST                0 (a)
              15 CALL_FUNCTION            1
              18 POP_TOP

   5          19 LOAD_FAST                1 (state)
              22 RETURN_VALUE

Note that the function takes only one argument:

 >>> f2
 <function f at 0x02EF841C>
 >>> f2.func_code.co_argcount
 1
 >>> f2(10, 'fails')
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: f() takes exactly 1 argument (2 given)

Regards,
Bengt Richter


From ojokimu at yahoo.co.uk  Tue Apr  5 15:07:43 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Tue, 5 Apr 2005 20:07:43 +0100 (BST)
Subject: re module non-greedy matches broken
In-Reply-To: 6667
Message-ID: <20050405190744.57004.qmail@web26809.mail.ukl.yahoo.com>


--- lothar <lothar at ultimathule.nul> wrote:
> a non-greedy match is implicitly defined in the documentation to be
> one such
> that there is no proper substring in the return which could also
> match the regex.
> 

If I understand this correctly, what you are asking is for re to look
for, or rather, anticipate, over-lapping matches (e.g. tags nested
inside tags). But the module documentation at "4.2.3 Module Contents"
specifically states that functions like re.findall do not do this. So I
think it's not that the regex engine is not up to the task - rather
that you may need to take into account the behaviour of some of the
module functions when composing your regexes. I'm sure it's possible to
do what you want using a regex alone - however, it may also be worth
looking at rolling your own search functions in order to get finer
control over the strategy of searching.


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From spunnjbob at aol.com  Fri Apr 22 11:36:33 2005
From: spunnjbob at aol.com (BrianQ)
Date: Fri, 22 Apr 2005 15:36:33 GMT
Subject: Another Phoney "intellectual"    Re: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
Message-ID: <Xns9640768FE7FC3quigatolahaolcom@140.99.99.130>

There is no honesty here.

I'll spare you attempts at interpretation.
If it means anything to you, look it up and read it for yourself.
If not, I apologize for perpetuating this OT thread.


> And who is Paul, does anyone know? 
> 
> "But when Paul perceived that the one part
> were Sadducees, and the other Pharisees, he
> cried out in the council, Men and brethren, I
> am a Pharisee, the son of a Pharisee: of the
> hope and resurrection of the dead I am called
> in question." (Acts 23: 6)> 

> And what did Christ PBBUH himself say
> concerning those?
> "Then Jesus said unto them, Take heed and
> beware of the leaven of the Pharisees and of
> the Sadducees." (Matthew 16: 6)
> 
>... Paul, whom
> if we are to believe in the Bible, we now
> know who he is and what we should do about
> his leaven, to Almighty God!


INDIVIDUAL Pharisees believed in Jesus
Acts 15:14

Jesus kindly received a fearful, believing, yet fearful Pharisee
John 3:1-21 In fact, what is probably the scripture most 
publicized these days (J3:16) was part of Jesus personal answer 
to this Pharisee

Who did JESUS say his message was for?
Luke 5:32

>From gospel writer Luke,who also wrote "Acts of the Apostles" 
this is what Jesus said about Paul:
Acts9:15-23



There are millions, maybe hundreds of millions of honest hearted 
Muslims
seeking to better know and serve The God.  You, the author of 
"God is not a man" are not one of them.


If you have something you'd like to offer from the Qur'an,
do so. Period.

And what of pretending to esteem The Bible while deliberately 
perverting it's message? (Galatians 1:6-9, Luke 17:1-2)


 Stop blemishing the name of honest people.
 


From rbt at athop1.ath.vt.edu  Wed Apr 27 16:48:35 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 27 Apr 2005 16:48:35 -0400
Subject: compile shebang into pyc file
In-Reply-To: <mailman.2591.1114620619.1799.python-list@python.org>
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com><fb66056705042707372695904d@mail.gmail.com><mailman.2582.1114615536.1799.python-list@python.org>	<1114616582.677507.252650@z14g2000cwz.googlegroups.com>
	<mailman.2591.1114620619.1799.python-list@python.org>
Message-ID: <d4otr3$b9f$1@solaris.cc.vt.edu>

Fredrik Lundh wrote:
> Joerg Schuster wrote:
> 
>> > #!/usr/bin/env python
>> > import app
>>
>> Yes, of course this is a possibility. But it implies having (or giving
>> away) two files.
> 
> 
> yeah, think of all the disk space you'll waste!
> 
>> Because if you have two files, you need a third one: a README
>> that tells you what to do with the two files
> 
> 
> so you're saying that the set of people that can deal with no more than one
> file at a time but knows how to install and configure Python (which in 
> itself
> comes with a few thousand files) is larger than zero?

On Windows, installing Python takes only a few clicks. No brain cycles 
needed ;)


From dcrespo at gmail.com  Mon Apr 18 12:28:57 2005
From: dcrespo at gmail.com (dcrespo)
Date: 18 Apr 2005 09:28:57 -0700
Subject: SQLite Database Manager
Message-ID: <1113841737.044401.44790@f14g2000cwb.googlegroups.com>

Hi all...
Does anybody know about the best SQLite Database Manager open source
web-based or standalone app under windows?

I tried:
- SQLiteManager (web-based - http://sqlitemanager.sourceforge.net/) but
I can't get it working. (When I try to just create a new database, it
does nothing... If anyone knows how to get it working, I am all ears
(or eyes) :) )

- the demo version of SQLite Analyzer 3
(http://www.kraslabs.com/sqlite_analyzer.html). It seems to be good
enough, but it isn't free ($40).

- SQLiteManager (stand-alone program - http://sqlabs.net) that isn't
free ($39)



From gg at yahoo.com  Tue Apr 12 02:22:17 2005
From: gg at yahoo.com (NewFilmFan)
Date: Tue, 12 Apr 2005 08:22:17 +0200
Subject: Problem with downloading from www
Message-ID: <pan.2005.04.12.06.22.16.63000@yahoo.com>

I use Python 2.3 on Windows XP.
I wrote this program:

import httplib
conn = httplib.HTTPConnection("www.x.net")
conn.request("GET", "/x/y.jpg")
r1 = conn.getresponse()
print r1.status, r1.reason
data = r1.read()
datei = open('test.jpg','w')
datei.write(data)
datei.close()

It is almost a copy of the manual. Now I can establish the connection and
receive the data. (The first response from the server is 200, OK.) The jpg
file is 198 K. But it is not a valid jpeg file. When I download with my
browser, the file has the length 197K and it is valid, of course. Is this
a problem of writing text or binary data to a file? Can anybody help me?

TIA,

nff


----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From codecraig at gmail.com  Tue Apr 19 13:03:29 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 10:03:29 -0700
Subject: XML-RPC -- send file
In-Reply-To: <mailman.2118.1113929395.1799.python-list@python.org>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
Message-ID: <1113930209.259905.112850@o13g2000cwo.googlegroups.com>

how would I decode it?



From ville at spammers.com  Thu Apr 28 06:11:52 2005
From: ville at spammers.com (Ville Vainio)
Date: 28 Apr 2005 13:11:52 +0300
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
	<d4qaqn$59u$2@eeyore.INS.cwru.edu>
Message-ID: <du7k6mnmcrb.fsf@lehtori.cc.tut.fi>

>>>>> "Brian" == Brian Beck <exogen at gmail.com> writes:

    Brian> Oh yeah, and what's with not being able to configure the
    Brian> code completion key sequence. How about *no* key sequence?
    Brian> That's the way every other IDE I've used does it. This is
    Brian> more like semi-automatic code completion.

It works like that for me. 

I type:

import os
os.<wait a second>

And I get the list of completions. 

Perhaps you are just being impatient?

Also, make sure that Preferences/pydev/code completion has
"Autocomplete on '.'" box checked.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From jjl at pobox.com  Fri Apr 22 16:45:38 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 20:45:38 +0000
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
Message-ID: <87oec6levh.fsf@pobox.com>

"dcrespo" <dcrespo at gmail.com> writes:

> Hi Grant Edwards...
> 
> Your solution requires a previous installation of Acrobat. Internally,
> the OS is sending the pdf file to the Acrobat PDF Driver and then it is
> sent to the printer. So you have to have Acrobat installed. Don't you?
> I want to avoid it installing a module that could do it (maybe I'm
> dreaming:( ). If there's no solution, then I will be very sad :-S
[...]
> Acrobat Reader 7.0, but I want to do it from a Win98 as well.
> Unfortunately, there's no Acrobat version under Win98 (the maximun is
> 5.1) that supports this kind of printing (what I had seen until now).
> It prints, but the all paper at letter size :(

That doesn't sound like a fundamental problem with AR 5.1 to me --
sounds like you just need to ask it more nicely ;-)

Have you tried the latest version of APFL ghostscript, though (8.51)?


> Any help? Any other tools? Any one like Cristal Report but for Python?
> I heard that wxPython supports some kind of reporting, but I don't know
> it. Anyone knows?

First, decide what qualities you need from your output format, then
decide which format you want, and how to generate and print it.  Is it
important that you have one, other, or both of bitmap or vector
output, for example?


John


From t.bettio at transnorm.ch  Thu Apr 14 17:18:10 2005
From: t.bettio at transnorm.ch (Tiziano Bettio)
Date: Thu, 14 Apr 2005 23:18:10 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <d3ml4c$crn$1@sea.gmane.org>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com><1113490437.037734.158740@g14g2000cwa.googlegroups.com>	<425EB9CA.1010708@transnorm.ch>
	<d3ml4c$crn$1@sea.gmane.org>
Message-ID: <425EDE12.3030208@transnorm.ch>

Fredrik Lundh wrote:

>Tiziano Bettio wrote:
>
>  
>
>>could someone please tell me that this thread wasn't a aprilsfoll day
>>joke and it is for real...
>>
>>i'm pretty much able to go down to a single bit but what would be the
>>reverse algorithm as stated by martin...
>>    
>>
>
>magic?
>
>I suggest running my script on a couple of small text files.  when you've done that,
>see if you can figure out how the decompression algorithm works.
>
></F> 
>
>
>
>  
>
Actually your script doesn't work on my python distribution...

(using 2.3.2)

cheers


From peter at engcorp.com  Thu Apr 28 15:56:55 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 28 Apr 2005 15:56:55 -0400
Subject: why "import wx" doesn't work?
In-Reply-To: <427126ca$1_3@rain.i-cable.com>
References: <427126ca$1_3@rain.i-cable.com>
Message-ID: <AIGdndAYHJms3ezfRVn-ig@powergate.ca>

monkey wrote:
> I just learn to make a blank windows frame with python and wxpython. I found
> the statment "import wx" cannot work as the original "from wxPython.wx
> import *". I see in the readme file of wxpython that if I install it as the
> default one, I can use "import wx" instead of the long one. What is wrong?
> The code pasted below:
> 
> import wx   # the default is "from wxPython.wx import *", I change it and it
> just can't work.
> 
> class MyApp(wxApp):
...

Assuming you've installed a version of wxPython that is recent enough 
that "import wx" works (it's really unclear from what you've written 
above), then the problem you are facing is not using the namespace that 
you've now imported.  Do this instead:

class MyApp(wx.App):
     def OnInit(self):
         frame = wx.Frame(NULL, -1, "....


Note that "wx." before everything from wxPython...

-Peter


From news at NOwillmcguganSPAM.com  Thu Apr 14 11:33:08 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Thu, 14 Apr 2005 16:33:08 +0100
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <mailman.1886.1113479564.1799.python-list@python.org>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>	<425e47a9$0$26352$db0fefd9@news.zen.co.uk>
	<mailman.1886.1113479564.1799.python-list@python.org>
Message-ID: <425e8d34$0$2589$da0feed9@news.zen.co.uk>

Fredrik Lundh wrote:
> Will McGugan wrote:
> 
> 
>>Please implement this as a Python module. I would like to compress my mp3 collection to single 
>>bits.
> 
> 
> here's the magic algorithm (somewhat simplified):
> 
> def algorithm(data):
>     m = 102021 # magic constant
>     d = [int(c) for c in str(1*2*3*4*5*m+5+4+2+1)]
>     x = [ord(c) for c in hex(1+2+4+5+m*5*4*3*2*1)]
>     x[d[0]*d[1]*d[2]] = x[d[-1]] + sum(d) - d[d[-d[-1]-1]] + d[0]
>     x = __import__("".join(chr(c) for c in x[d[0]*d[1]:])).encodestring
>     return "".join(x(data).split("\n")).rstrip("="), sum(d)-sum(reversed(d))
> 
> and here's a driver for your MP3 collection:
> 
> import glob
> 
> def compress(filename):
>     data = open(filename, "rb").read()
>     keycode, bit = algorithm(data)
>     file = open(keycode + ".out", "wb")
>     file.write(chr(bit))
>     file.close()
>     print "compressed", filename,
>     print len(data), "=>", 1, round(100.0/len(data), 3), "%"
> 
> for file in glob.glob("*.mp3"):
>     compress(file)
> 
> </F> 
> 
> 

Muchas gracias. Although there may be a bug. I compressed my Evanescence 
albumn, but after decompression it became the complete works of Charles 
Dickens..


-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From peer.griebel at web.de  Tue Apr 19 09:31:51 2005
From: peer.griebel at web.de (Peer Dr. Griebel)
Date: Tue, 19 Apr 2005 15:31:51 +0200
Subject: Working with method-wrapper objects
Message-ID: <1830947848@web.de>

I think I was a little bit unspecific in my last mail.

I would like to see some description about method-wrapper and
wrapper_descriptor objects.  I dont' understand the following behaviour:

>>> type([].__str__)
<type 'method-wrapper'>
>>> type(object.__str__)
<type 'wrapper_descriptor'>
>>> type(object().__str__)
<type 'method-wrapper'>

>>> import inspect
>>> inspect.isroutine([].__str__)
False
>>> inspect.isroutine(object.__str__)
True
>>> inspect.isroutine(object().__str__)
False

Why has [].__str__ a different type than object.__str__?
Why is object.__str__ a routine while object().__str__ not?

And one again my question: Can I extract some more information about a
methed-wrapper object. E.g. can I somehow determine the arg spec?

Thanks
  Peer

______________________________________________________________
Verschicken Sie romantische, coole und witzige Bilder per SMS!
Jetzt bei WEB.DE FreeMail: http://f.web.de/?mc=021193



From onurb at xiludom.gro  Thu Apr 14 10:56:19 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Thu, 14 Apr 2005 16:56:19 +0200
Subject: Converting a perl module to a python module would it be worth
 it?
In-Reply-To: <425e7c41$1@usenet.ugs.com>
References: <425e7c41$1@usenet.ugs.com>
Message-ID: <425e8494$0$10741$626a14ce@news.free.fr>

Mothra wrote:
> Hi All,
> 
> I am the current author of the Astro-Sunrise perl module
> http://search.cpan.org/~rkhill/Astro-Sunrise-0.91/Sunrise.pm
> and was wondering if it would be worth while to convert it to python.

Only you and your module's users may tell...

> First off, I have never programmed in python. I would like to use
> this project to learn python. 

Well, this might be an answer to your first question !-)

> I was wondering if there was a
> "How to program python for perl programmers" 
> Kinda
> like what is different between the two, pitfalls for perl programmers
> and what not.

http://www.hackdiary.com/slides/lpw2004/
http://starship.python.net/crew/aahz/OSCON2002/
http://mail.python.org/pipermail/python-list/2004-September/241757.html
http://pleac.sourceforge.net/

Google is your friend, as usual...

Note that, apart from the Perl/Python diffs, Python has some (few) 
gotchas, one of them being the difference between mutable and immutable 
objects.

> Another question is, if I do this where can I put the results?
> As far as I know python has no "CPAN".
http://www.python.org/pypi/

> Thanks in advance.

HTH, and welcome on board.

PS: please don't consider my sig as representative of a good Python 
coding style !-)

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


From hongqn at gmail.com  Fri Apr 15 13:46:13 2005
From: hongqn at gmail.com (Qiangning Hong)
Date: Sat, 16 Apr 2005 01:46:13 +0800
Subject: distutils question: different projects under same namespace
Message-ID: <b64ef0ce050415104652d9ca7b@mail.gmail.com>

To avoid namespace confliction with other Python packages, I want all my 
projects to be put into a specific namespace, e.g. 'hongqn' package, so that 
I can use "from hongqn.proj1 import module1", "from
hongqn.proj2.subpack1import module2", etc.

These projects are developed and maintained and distributed seperately, so I 
should not make a whole 'hongqn' package with one setup.py. I must write 
setup.py scripts for each project. I meet a problem here.

For instance, I am writing setup.py script for proj1. I use the following 
parameters when calling distutils.core.setup:

setup(
...
package_dir = {'hongqn.proj1': 'proj1'},
packages = ['hongqn.proj1'],
...
)

"python setup.py install" will create /usr/lib/python2.3/hongqn/proj1 
directory and copy proj1/*.py there. But this is UNUSABLE! There is NO 
__init__.py file under /usr/lib/python2.3/hongqn/ so that import 
hongqn.proj1 will fail!

I am considering manually create this __init__.py by hacking the install_lib 
command. But before making my hands dirty, I want to know if there is an 
"official" solution exists or others have already success stories on this 
matter.

As a note, I wish the solution can handle setup.py bdist and bdist_wininst 
well.

-- 
Qiangning Hong
Get Firefox! <
http://www.spreadfirefox.com/?q=affiliates&amp;id=67907&amp;t=1>
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From jepler at unpythonic.net  Thu Apr  7 22:52:11 2005
From: jepler at unpythonic.net (jepler at unpythonic.net)
Date: Thu, 7 Apr 2005 21:52:11 -0500
Subject: Sockets
In-Reply-To: <36qb5199613lai084brifj8judpoummv6n@4ax.com>
References: <36qb5199613lai084brifj8judpoummv6n@4ax.com>
Message-ID: <20050408025211.GA4677@unpythonic.net>

Python strings always carry their length, and can have embedded NULs.
    s.write("\0\1\2\3")
should write 4 bytes to the socket 's'.

Jeff
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From ajikoe at gmail.com  Wed Apr 13 06:08:33 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 13 Apr 2005 03:08:33 -0700
Subject: how to explain such codes, python's bug or mine?
In-Reply-To: <d3iqhe$1s0l$1@mail.cn99.com>
References: <d3iqhe$1s0l$1@mail.cn99.com>
Message-ID: <1113386913.961445.165950@z14g2000cwz.googlegroups.com>

Hi,

it is not python bug.
You refer the list j and remove the element in the same time, that is
the problem. Python dinamicaly goes to the next element with the same
index but apply it in the new list.

use this code instead:
  j = range(20)
  print j
  L = [x for x in j if x > 10]
  print L

Sincerely Yours,
Pujo



From rpmuller at gmail.com  Sat Apr 23 16:16:53 2005
From: rpmuller at gmail.com (RickMuller)
Date: 23 Apr 2005 13:16:53 -0700
Subject: Does numarray search for blas and lapack during installation?
In-Reply-To: <doqdnR9EAZG14vffRVn-gg@comcast.com>
References: <doqdnR9EAZG14vffRVn-gg@comcast.com>
Message-ID: <1114287413.674743.319290@g14g2000cwa.googlegroups.com>

IIRC, no. But the setup.py script is fairly easy to hack to link in
your own blas/lapack libraries.



From mauriceling at acm.org  Sat Apr 16 21:59:45 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 17 Apr 2005 11:59:45 +1000
Subject: new to mac OS10
In-Reply-To: <d3ojjf$n11$1@geraldo.cc.utexas.edu>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>
	<d3ojjf$n11$1@geraldo.cc.utexas.edu>
Message-ID: <4261C311.8070502@acm.org>

Hi Thomas,

It seems that you've cleanly killed the Apple-installed Python, which 
isn't too bad a thing after all. What I can suggest you do is this... 
Copy the entire /System/Library/Frameworks/Python.framework directory 
from someone and drop it into your system (same place of course). I will 
not suggest installing Python 2.4.1 until the Apple-installed Python is 
sorted out. My reasons being,

1. I have no idea what Mac OSX uses Python for. Although symlink may get 
you through most of the time but I cannot be sure that none of OSX's 
stuffs are hardcoded to use the Python in 
/System/Library/Frameworks/Python.framework.

2. Installing another Python may or may not be a precise remedy. It may 
just worsen things and I won't want to bet on that.

3. Apple-installed Python's command line tools are symlinked from 
/usr/bin to /System/Library/Frameworks/Python.framework but the OSX 
installer for Python 2.4.1 places the commandline tools in 
/usr/local/bin and symlinked to /Library/Frameworks/Python.framework. So 
it seems to me that Python 2.4.1 (installed using OSX installer for 
Python 2.4.1) is not a precise replacement of Apple-installed Python...

For me, my setup is this

ls -all /usr/bin/python*
lrwxr-xr-x  1 root  wheel   14  4 Apr 08:40 /usr/bin/python -> 
/sw/bin/python
lrwxr-xr-x  1 root  wheel   72  1 Apr  1976 /usr/bin/python2.3 -> 
../../System/Library/Frameworks/Python.framework/Versions/2.3/bin/python
lrwxr-xr-x  1 root  wheel   10  1 Apr  1976 /usr/bin/pythonw -> pythonw2.3
-rwxr-xr-x  1 root  wheel  122  9 Jun  2003 /usr/bin/pythonw2.3

/usr/bin/pythonw2.3 and /usr/bin/python2.3 points to the same thing, 
/System/Library/Frameworks/Python.framework/Versions/2.3/bin/python. And 
I have Fink's Python in /sw/bin/python.

So now, for me, if I need to use the Apple-installed Python, my command 
line is "pythonw" while "python" gives me Fink's Python as shown below:

~ mauriceling$ pythonw
Python 2.3 (#1, Sep 13 2003, 00:49:11)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import sys
 >>> sys.path
['', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python23.zip', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-darwin', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-mac', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/plat-mac/lib-scriptpackages', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-tk', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-dynload', 
'/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/site-packages']
 >>>


~ mauriceling$ python
Python 2.3.5 (#1, Apr  6 2005, 13:01:10)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1671)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import sys
 >>> sys.path
['', '/sw/lib/python23.zip', '/sw/lib/python2.3', 
'/sw/lib/python2.3/plat-darwin', '/sw/lib/python2.3/plat-mac', 
'/sw/lib/python2.3/plat-mac/lib-scriptpackages', 
'/sw/lib/python2.3/lib-tk', '/sw/lib/python2.3/lib-dynload', 
'/sw/lib/python2.3/site-packages', 
'/sw/lib/python2.3/site-packages/Numeric', 
'/sw/lib/python2.3/site-packages/libsbml', 
'/sw/lib/python2.3/site-packages/gtk-2.0']
 >>>

There is no problem with having multiple versions and copies of Pythons 
in your system. The problems are:

1. get all the symlinks correct
2. know when to use what and how to use
3. means that you may have to install the same 3rd party library x-times 
for x-numbers of Pythons you might have... quite a pain...

Cheers
Maurice




From maxm at mxm.dk  Fri Apr  8 03:14:37 2005
From: maxm at mxm.dk (Max M)
Date: Fri, 08 Apr 2005 09:14:37 +0200
Subject: Problems extracting attachment from email
In-Reply-To: <cf4db78a.0504070817.3c776e07@posting.google.com>
References: <cf4db78a.0504070817.3c776e07@posting.google.com>
Message-ID: <42562f28$0$259$edfadb0f@dread12.news.tele.dk>

foten wrote:

> The problem I'm having is when I'm trying to extract the
> attachement using
>         f=open(Filename, "wb")
>         f.write(msg.get_payload(decode=1))
>         f.close()
> Not the whole message is decoded and stored!
> When only trying
>         f.write(msg.get_payload())
> I see that the last 255 bytes are missing.
> 
> How is this possible, I receive every last byte from stdin?


I don't think its a Python problem. Those methods are used in a lot of 
places. Your file is most likely not what it is supposed to be.


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From martijn at gamecreators.nl  Fri Apr  1 08:21:28 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 1 Apr 2005 05:21:28 -0800
Subject: Spider - path conflict [../test.htm,www.nic.nl/index.html]
In-Reply-To: <mailman.1181.1112360824.1799.python-list@python.org>
References: <1112357294.881735.287370@o13g2000cwo.googlegroups.com>
	<mailman.1181.1112360824.1799.python-list@python.org>
Message-ID: <1112361688.180856.220390@f14g2000cwb.googlegroups.com>

urllib.basejoin() that's what I need :)

 haha what a stupid code did I made.

Thanks
 GC-Martijn



From simon.brunning at gmail.com  Thu Apr 21 06:17:01 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 21 Apr 2005 11:17:01 +0100
Subject: Dictionary question.
In-Reply-To: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
Message-ID: <8c7f10c60504210317a51586@mail.gmail.com>

On 21 Apr 2005 02:47:42 -0700, hawkesed <olaamigoquepasa at hotmail.com> wrote:
>   I am semi new to Python. Here is my problem : I have a list of 100
> random integers. I want to be able to construct a histogram out of the
> data. So I want to know how many 70's, 71's, etc. I can't figure out
> how to do this. A dictionary is supposedly can do key value pairs
> right? I want to be able to see if say 75 is in the data structure, and
> what its value is, then increment its value as I go through the list
> finding items.
>   I am sure there is a way to do this. Is a dictionary what I should be
> using? Thanks for any help. Hope this makes sense, its getting very
> late here.

Sounds like homework, so I'll just say that yes, a dictionary would be
ideal for what you are trying to do.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From tjreedy at udel.edu  Sat Apr 23 23:58:02 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 23 Apr 2005 23:58:02 -0400
Subject: help with binary file io, perhaps with generators?
References: <5e183f3d0504231924e989ea2@mail.gmail.com>
Message-ID: <d4f574$8qj$1@sea.gmane.org>


"Marcus Goldfish" <magoldfish at gmail.com> wrote in message 
news:5e183f3d0504231924e989ea2 at mail.gmail.com...
>I need to write a "fast" file reader in python for binary files structured 
>as:
>
> ? x[0] y[0] z[0] x[1] y[1] z[1]  ?
>
> where c[k] is the k-th element from sequence c.  As mentioned, the
> file is binary -- spaces above are just for visualization.  Each
> element, c[k], is a 16-bit int.

You have a sequence of machine-format triples

>   (ii) how can I handle the 16-bit word aspect of the binary data?

that you want to unpack (see struct module) and unzip (your code).

>  I can assume I know the number of sequences in the file a priori.

Then you can pre-allocate x,y,z instead of growing them by appends:

x = n*[0]; ...

> Files are stored and processed on a
> WinXP machine (in case Endian-ness matters).

I believe struct module takes care of this.  Read its doc.

>   (i) should I use generators for iterating over the file?

If you will only ever unpack when you also unzip to separate lists, then 
you might put the unpack code in the inner loop of the unzip method.  If 
you think that you might someday directly process the file as a sequence of 
scaler triples without creating intermediate x,y,z lists, then you should 
factor out the file read/unpack as you are thinking.

>   (iii) ultimately, the data will need to be processed in chunks of
>         M-values at a time... I assume this means I need some
>         form of buffered io wrapper, but I'm not sure where to start
>         with this.

I presume this means M triplets or 3*N values.
In any case, Python is ahead of you ;-).

>>>help(file.read)
    read([size]) -> read at most size bytes, returned as a string.

    If the size argument is negative or omitted, read until EOF is reached.

Terry J. Reedy






From pclinch at internet-glue.co.uk  Thu Apr  7 14:24:04 2005
From: pclinch at internet-glue.co.uk (Paul Clinch)
Date: 7 Apr 2005 11:24:04 -0700
Subject: import statement - package visibility problem
References: <mailman.1478.1112870310.1799.python-list@python.org>
Message-ID: <8cf2994e.0504071024.69de669f@posting.google.com>

Laszlo,
For :-
> Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
> win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import Lib
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "Lib\__init__.py", line 1, in ?
>     import Server
>   File "Lib\Server\__init__.py", line 1, in ?
>     import Db
>   File "C:\Python\Lib\Db\__init__.py", line 29, in ?
>     import      Adapters
>   File "C:\Python\Lib\Db\Adapters\__init__.py", line 21, in ?
>     import FireBirdConnection
>   File "Db\Adapters\FireBirdConnection.py", line 27, in ?
> ImportError: No module named DatabaseConnection
>  >>>
> 
I get:
>>> import Lib
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: No module named Lib

I guess there's a Lib/__init__.py.

But onto the point you're making. I think its possibly a mis-viewing
of the package idea in Python. A package creates a name space. If you
create Lib/Server/Db with all the __init__.py files, its because you
want to import Lib.Server.Db,  rather than a way of organising your
source files.

If you want to have a single name space, and keep the nested
arrangement of directories, you can add python code in Lib/__init__.py
to traverse directories and import packages that you find. Or you can
define any rules for mapping files and directories to the name space
you desire.

Regards, Paul


From bill.mill at gmail.com  Fri Apr 22 20:58:49 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 22 Apr 2005 20:58:49 -0400
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
Message-ID: <797fe3d40504221758302e6f94@mail.gmail.com>

On 22 Apr 2005 14:41:45 -0700, mehmetmutigozel at gmail.com
<mehmetmutigozel at gmail.com> wrote:
> I was thinking about something like the following;
> 
> >>> a=[ t**n for n in range(4) ]
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 't' is not defined
> >>>
> 
> or
> 
> >>> a=[ lambda t: t**n for n in range(4) ]
> >>> t=2
> >>> a
> [<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
> <function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
> >>> t=3
> >>> a
> [<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
> <function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
> >>>
> 

Well, everybody else took away your lambda (greedy people!) but I'm
here to say that it doesn't *have* to go away. I didn't think this
would be possible, but it is:

>>> t = 2
>>> [(lambda n: t**n)(n) for n in range(4)]
[1, 2, 4, 8]
>>> t = 3
>>> [(lambda n: t**n)(n) for n in range(4)]
[1, 3, 9, 27]

I just thought that was kinda neat. If you wanted to obfuscate some
python, this would be an awesome trick - hide the value of t somewhere
early in the function then pull a variation of this out later.

Peace
Bill Mill
bill.mill at gmail.com


From cookedm+news at physics.mcmaster.ca  Thu Apr 21 13:13:17 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 21 Apr 2005 13:13:17 -0400
Subject: Is there a package with convolution and related methods?
References: <YTO9e.98425$cg1.44378@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <qnkpswoyrwy.fsf@arbutus.physics.mcmaster.ca>

Charles Krug <cdkrug at worldnet.att.net> writes:

> List:
>
> Is there a Python package with Convolution and related methods?
>
> I'm working on modeling some DSP processes in Python.  I've rolled one
> up, but don't feel much like reinventing the wheel, especially if
> there's already something like "Insanely Efficient FFT for Python"
> already.
>
> Thanks

You most certainly want to look at the numerical python packages
Numeric and numarray (http://numeric.scipy.org/) for array
manipulations, and scipy (http://scipy.org) has wraps for FFTW (Fast
Fourier Transform in the West).

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From removethis.kartic.krishnamurthy at gmail.com  Sat Apr 30 10:39:50 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sat, 30 Apr 2005 14:39:50 GMT
Subject: [newbie] Embedding Flash OCX object
In-Reply-To: <xeidnY1zZ8VM5e_fRVnyuA@scarlet.biz>
References: <xeidnY1zZ8VM5e_fRVnyuA@scarlet.biz>
Message-ID: <WMMce.2066$6z3.1571@newssvr33.news.prodigy.com>

The Great 'Exeem' uttered these words on 4/29/2005 2:11 PM:
> Hi All,
> 
> I'm trying to find a way to embbed the flash.ocx object in a Windows Python 
> application,
> I've successfully integrated a flash object with the ocx already installed 
> on the system using the Activex Wrapper,
> but i would like to embbed it inside my application in order to distribute 
> my application without the need for the user to install the flash player.
> It would like also to embbed the flash animation inside my application 
> without loading it .. i mean directly from the memory.
> 
> I've seen that it was possible in C++ or in Delphi, using the 
> http://www.flashplayercontrol.com/ .. but don't know how to make it in 
> Python.
> 
> Any ideas are welcome
> 
> Dan. 


Dan,

wxPython has the capability to embed Flash inside a wxPython panel. It 
uses Macromedia's Flash ocx that is installed when installing flash 
player on Windows. And it is pretty nifty; take a look at the demo.

 From your message, it is appears you are using win32gui functions but I 
am unable to tell. So using Win32, I do not know how you can do what you 
are trying. But yeah, look into wxPython!

Please let me know if you need more assistance.

Thanks,
-Kartic


From piet at cs.uu.nl  Wed Apr 27 05:38:02 2005
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Wed, 27 Apr 2005 11:38:02 +0200
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<116inf1aivjgd28@corp.supernews.com>
	<1114205820.773917.70820@f14g2000cwb.googlegroups.com>
	<116is1or7an6735@corp.supernews.com>
	<d4dje8$ebt$02$3@news.t-online.com>
Message-ID: <wz8y34woed.fsf@ordesa.cs.uu.nl>

>>>>> "Diez B. Roggisch" <deetsNOSPAM at web.de> (DBR) wrote:

>>> You're use of the word "driver" is one with which I'm not
>>> familiar.  But I don't really "do windows" so it's probably a
>>> Widnowism.

>DBR> It could be that he means that creating PDFs on windows is done using
>DBR> a fake printer that will produce the pdf when being printed to - and
>DBR> that fake printer is implemented as a driver.

But that is about creating a PDF file, whereas the OP was speaking about
printing an existing PDF file, For that you need a PDF interpreter, not a
PDF printer driver.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: piet at vanoostrum.org


From modelnine at ceosg.de  Mon Apr  4 06:52:13 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 12:52:13 +0200
Subject: import and scope inconsistency?
In-Reply-To: <d2r4j1$ggn$1@scotsman.ed.ac.uk>
References: <d2r4j1$ggn$1@scotsman.ed.ac.uk>
Message-ID: <200504041252.16767.modelnine@ceosg.de>

You're putting a Reply-To header in your posts to the mailing-list, but the 
Reply-To address bounces.

Please correct: on't put in a Reply-To header, or at least put in some address 
that doesn't bounce.

-- 
--- Heiko.
listening to: aenima_15_Third Eye.mp3
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From merkosh at hadiko.de  Tue Apr 12 11:30:56 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 17:30:56 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
	<d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>
Message-ID: <d3gpjh$uva$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 17:00 pm Michele Simionato wrote:

> I did not put memoize on __new__. I put it on the metaclass __call__.
> Here is my memoize:
[...] 

Clever, thanks! :)

Ciao
Uwe     


From adonisv at DELETETHISTEXTearthlink.net  Tue Apr 12 17:44:04 2005
From: adonisv at DELETETHISTEXTearthlink.net (Adonis)
Date: Tue, 12 Apr 2005 21:44:04 GMT
Subject: Web Application Client Module
In-Reply-To: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
Message-ID: <EiX6e.8689$44.2430@newsread1.news.atl.earthlink.net>

Raffi wrote:
> Hi All,
> 
> I hope I'm posting this question to the correct newsgroups. We have a
> web based database application that's accessed using IE. The
> application opens a popup window to run in. With all the popup blockers
> and compromised browsers out there, I'm looking into developing a web
> based custom client side application to access the application with.
> The application will be developed to only reach the web application
> site using the https protocol. It also needs to javascript enabled. It
> will be downloaded from the main web site and used to access the
> database application.
> 
> Any suggestions/ideas on how to go about developing the client
> application? What tools tools are out there for such a project.
> 
> Thanks,
> Raffi
> 

This is slightly what I am doing right now, you can use the JavaScript 
on the browser to (mainly the XMLHttpRequest object) to access servers 
asynchronously, when accessing the server's resource it returns an XML 
representation (document) of whatever you want using the browser's 
builtin DOM you can parse this and using the same DOM you can modify the 
predefined tags or whatever you want.  This approach reduces the traffic 
to the webserver by only accessing data you need. go to cherrypy.org and 
right on the start page there should be a link labeled AJAX which is the 
buzzword being used for this kind of implementation.

Hope this helps.

Adonis


From cjbottaro at alumni.cs.utexas.edu  Fri Apr  8 17:17:33 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Fri, 08 Apr 2005 16:17:33 -0500
Subject: base64 interoperability
References: <d36j9a$b23$1@sea.gmane.org> <d36oad$sfa$1@sea.gmane.org>
Message-ID: <d36s7q$esa$1@sea.gmane.org>

<posted & mailed>

Fredrik Lundh wrote:

> Christopher J. Bottaro wrote:
>> Python's base64 module encodes and decodes differently than PHP's.
> 
> really?

Yeah, weird, huh?  Actually the problem is that Python puts newlines at
every 76th char.  How do I stop Python from doing that?  I just want
everyone on one line.

>> Python's docs says that it ahere's to RFC1521 (sept 1993), while PHP's
>> adheres
>> to RFC2045 (nov 1996).  Is there any Python module that uses the new
>> standard? Why is Python using the old standard anyways?
> 
> have you checked this, or are you just assuming that RFC1521 and RFC2045
> contains different BASE64 definitions?

I was just assuming...=)

> (if you look at the standards, 
> you'll find
> that they're about MIME, not BASE64 itself.  as far as I know, BASE64
> hasn't changed a bit since it was first defined back in RFC1113).
> 
> </F>

-- C



From todd at digeo.com  Thu Apr 28 15:49:24 2005
From: todd at digeo.com (Todd Krein)
Date: 28 Apr 2005 12:49:24 -0700
Subject: Can'r run BLT twice?
Message-ID: <1114717764.808143.317510@o13g2000cwo.googlegroups.com>

I'm running PythonWin on XP. When I run my plotter program the first
time, it works fine. The second time I run it, I get the following
error. If I exit PythonWin, and restart, I can again run it once. Any
ideas?

Error: 1
TclError Exception in Tk callback
  Function: <bound method PathEval.doOpenTrace of <__main__.PathEval
instance at 0x0127AC60>> (type: <type 'instancemethod'>)
  Args: ()
Traceback (innermost last):
  File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBase.py", line 1747, in
__call__
    None
  File
"C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
line 89, in doOpenTrace
    self.doPlotTrace()                          # go plot the thing
  File
"C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
line 117, in doPlotTrace
    self.graph = Pmw.Blt.Graph(tkRoot)                   # make a new
graph area
  File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBlt.py", line 260, in
__init__
    None
  File "C:\Python24\lib\lib-tk\Tkinter.py", line 1861, in __init__
    self.tk.call(
TclError: invalid command name "::blt::graph"



From peufeu at free.fr  Tue Apr 12 16:47:01 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 22:47:01 +0200
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113333625.215786.198580@l41g2000cwc.googlegroups.com>
	<mailman.1684.1113228968.1799.python-list@python.org>
	<op.so2d8n2cqfv3if@localhost>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
Message-ID: <op.so4z0nftqfv3if@localhost>


> Bottomline - mysql has a lot of marketshare, is improving, and I'm sure
> that it'll eventually be a credible product.  But right now it's has a
> wide range of inexcusable problems.

	I so totally agree with you.
	I find that mysql promotes bad coding practices by ignoring errors and  
substituting invalid data with factory defaults. If it complained when an  
obvious error occured (like inserting an invalid date or saying "I can't  
fit this data in this column") it would be easy to find the bug ; instead  
it shows up months later in creepy ways when you realize part of your data  
was truncated, or otherwise screwed up in quite imaginative ways, and you  
have to fix the damn thing by hand, burning your eyes on phpmyadmin  
screens.
	Also most of the interesting features are in the Beta 5.0 !
	I find it ironic that it's the biggest open source database while there  
are a lot of really free alternatives like firebird or postgres, which  
have all the good features Right Now, and which Just Work. There is also a  
lot of marketing hype and frankly I have no trust at all in a company  
which was making public statements like "Who needs foreign keys ?" just  
because their product didnot supports them, then when it supports them,  
changing their PR to match.

> More info at http://sql-info.de/mysql/gotchas.html
> buck




From gandalf at geochemsource.com  Thu Apr  7 11:24:28 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 17:24:28 +0200
Subject: import statement - package visibility problem
In-Reply-To: <425539D2.2020001@rubin.hu>
References: <42550CB9.8060309@geochemsource.com> <425539D2.2020001@rubin.hu>
Message-ID: <425550AC.2020006@geochemsource.com>


>
> Two solutions come into my mind:
>
> 1. Do not inherit from DatabaseConnection, but pass a 
> DatabaseConnection object as a parameter to the FireBirdConnection's 
> __init__function. After this you can delegate the necessary 
> functionality to the DatabaseConnection (by using __getattr__). This 
> introduces less coupling between DatabaseConnection and 
> FireBirdConnection, event module testing is easier.

I do not like this solution. I would like to use the classic 
'generalization/specialization' idiom, where the base class defines the 
interface and some common methods; while the descendants are 
specializing the basic classes. The language should allow me this 
classic approach and indeed it does.

>
> 2. Maybe the layering of your application is wrong. If 
> DatabaseConnection provides common functionality to the different 
> Adapters, it should be on the same layer or one beneath the Adapters.

I have a bad feeling about it. For example, I have database related 
modules under Db. I would like to implement the basic abstract classes 
at the top level, then implement the specialized classes at deeper 
levels. E.g. I can access DatabaseConnection, DatabaseSchema, 
SQLProcessor and similar classes in the top level module "Db". I would 
like to implement as much functionality in this abstract level as 
possible (reusing code is important for me). Then at some point when I 
want to implement something - for example, a connection class for 
PostgreSQL databases - then I only need to implement the unimplemented 
or extra features of a PostgreSQL connection. There can be many 
different implementations, this is why I want to store the more 
implemented (less abstracted) levels deeper in the source tree. I cannot 
imagine how could it be in the opposite direction. The abstract classes 
at the top level need to import their abstract counterparts, so I cannot 
place the abstract classes in the deepest folders - I need to place them 
at top level because they use each other very frequently. Do you 
disagree? Is this a bad design from me?

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From leszczynscy at nospamyahoo.com  Tue Apr 26 22:47:15 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Tue, 26 Apr 2005 21:47:15 -0500
Subject: How remove directories with the content in the platform
 independent way?
In-Reply-To: <mailman.2555.1114569257.1799.python-list@python.org>
References: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>
	<mailman.2555.1114569257.1799.python-list@python.org>
Message-ID: <7_adnZPgfvQeYfPfRVn-rg@comcast.com>

James Stroud wrote:
> Look at the os and os.path modules.
> 
> http://docs.python.org/lib/module-os.html
> http://docs.python.org/lib/module-os.path.html
> 
> 
> 
> On Tuesday 26 April 2005 07:27 pm, so sayeth Andy Leszczynski:
> 
>>How remove directories with the content in the platform independent way?
>>Is the API for that?
>>
>>Thx, A.
> 
> 
It is not clear if rmdir would remove the non-empty dir ...



From steven.bethard at gmail.com  Tue Apr 12 17:09:49 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 12 Apr 2005 15:09:49 -0600
Subject: variables exist
In-Reply-To: <425c1353$1@nntp0.pdx.net>
References: <9622d535.0504110552.1e070e8d@posting.google.com>	<d3e0jj$93d$1@sea.gmane.org>	<mailman.1703.1113237192.1799.python-list@python.org>	<d3g2fb$76m$1@blackmamba.itd.rl.ac.uk>
	<mailman.1775.1113323764.1799.python-list@python.org>
	<425c1353$1@nntp0.pdx.net>
Message-ID: <IqCdnV4EB9OBpMHfRVn-sg@comcast.com>

Scott David Daniels wrote:
> Brian van den Broek wrote:
> 
>> ... STeVe stressed that the try/except solution is only really 
>> appropriate for cases where the failure to have the variable defined 
>> is quite rare. 
> 
> Beware: C++ and Java have an immense overhead for exceptions.  Python
> has a very lightweight exception mechanism.  You should _very_seldom_
> choose exceptions or not on the basis of performance without measuring
> the actual use; you are sure to be surprised.

I'll just point out that I wasn't suggesting that try/except should be 
used as an optimization, but that it should be used when *exceptional* 
behavior is encountered.  Using try/except for non-exceptional behavior 
can be confusing for readers of your code who assume the normal 
semantics.  Just to make sure my point is clear, a great case for 
try/except is with dictionaries, e.g.
     try:
         v = d[k]
     except KeyError:
         ...
In this case, the key not being in the dictionary clearly makes sense as 
exceptional behavior because there's no reason to have a dictionary if 
there's nothing in it.  Similarly, try/excepts are great for dealing 
with duck typing issues, e.g.:
     def f(mapping)
         try:
             itervalues = mapping.itervalues
         except AttributeError:
             values = (mapping[k] for k in mapping)
         else:
             values = itervalues()
         ...
Again, the point is that the AttributeError is the *exceptional* 
behavior; f expects a mapping with an itervalues method, and if it 
receives an object that doesn't have one, it has to deal with the 
exceptional case of replacing that method.

Anyway, I hope that clarifies my intentions.  Use try/except when it 
makes sense to talk about something as being *exceptional* behavior.  If 
it doesn't, you should probably use if/else.

STeVe

P.S. That said, there *are* performance differences.  Here's a test that 
shows how try/except can be more costly the more often the except clause 
is reached:

----------------------------------------------------------------------
import timeit

def ifelse(mapping, key):
     if key in mapping:
         return mapping[key]
     else:
         return None

def tryexcept(mapping, key):
     try:
         return mapping[key]
     except KeyError:
         return None

setup_code = """\
from __main__ import %s as func
mapping = %s
keys = %s
"""

test_code = '[func(mapping, key) for key in keys]'

def get_time(func, mapping, keys):
     return timeit.Timer(test_code, setup_code % (
         func.__name__, mapping, keys)).timeit(1000)

if __name__ == '__main__':
     N = 1000
     mapping = dict((i, i**2) for i in xrange(N))
     for i in [0, 1, 2, 4, 8]:
         number_missing = i*N/100
         keys = range(number_missing, N + number_missing)
         ifelse_time, tryexcept_time = (get_time(func, mapping, keys)
                                        for func in [ifelse, tryexcept])
         result = ['%3i%%' % (100*number_missing/N)]
         for time, func in sorted([(ifelse_time, ifelse),
                                   (tryexcept_time, tryexcept)]):
             result.extend(['%.4f' % time, '%10s' % func.__name__])
         print '\t'.join(result)
----------------------------------------------------------------------

And the results I get from running it:

[D:\Steve]$ test.py
   0%    0.8467   tryexcept      0.9415      ifelse
   1%    0.9374   tryexcept      0.9430      ifelse
   2%    0.9499      ifelse      1.0375   tryexcept
   4%    0.9580      ifelse      1.1576   tryexcept
   8%    0.9333      ifelse      1.4187   tryexcept

Thus try/except is better when almost all of the keys can be found in 
the dict, but as soon as even 2% of the keys cannot, if/else is the more 
efficient solution.  This is toy data, so obviously YMMV.  But if you 
use try/except for a very frequent occurrence instead of an exceptional 
one, you may notice a performance hit.


From mauriceling at acm.org  Thu Apr  7 20:26:07 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 08 Apr 2005 10:26:07 +1000
Subject: text processing problem
References: <d34a7f$gnd$1@domitilla.aioe.org>
	<1112915641.663333.175260@f14g2000cwb.googlegroups.com>
Message-ID: <d34j31$nu6$1@domitilla.aioe.org>

Matt wrote:
> 
> 
> Try this:
> import re
> my_expr = re.compile(r'(\w+) (\(\1\))')
> s = "this is (is) a test"
> print my_expr.sub(r'\1', s)
> #prints 'this is a test'
> 
> M@
> 

Thank you Matt. It works out well. The only think that gives it problem 
is in events as "there  (there)", where between the word and the same 
bracketted word is more than one whitespaces...

Cheers
Maurice


From codecraig at gmail.com  Fri Apr 22 14:14:48 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 11:14:48 -0700
Subject: Threading question
Message-ID: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>

If i have a class such as

class Foo:
    def doSomething(self, cmd, cmd2, callback):
        cmd = <translate command>
        results = <..do some possibly long task..>
        callback(results)

What I am looking to do is have that "long task" done in a separate
thread...how can I do this?

I was thinking..

class MyThread(Thread):
    def __init__(self, cmd, cmd2, callback):
        self.__cmd = cmd
        self.__cmd2 = cmd2
        self.__callback = callback

    def run(self):
        # do stuff here
        self.__callback(some_results)

...anyhow, this just didnt seem good.  I felt like i either had to pass
MyThread a bunch of arguments it needed to run the long task, or i
would end up passing it a 'master'...but then in MyThread I'd have

self.__master.__service.execute_cmd(self.__cmd)

...in java I would just create an inner class..but i am not sure
how/what to do in python.

thanks.



From msoulier at gmail.com  Thu Apr 28 22:20:39 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Thu, 28 Apr 2005 22:20:39 -0400
Subject: New Python website
In-Reply-To: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
References: <1114735502.510591.6360@f14g2000cwb.googlegroups.com>
Message-ID: <fb66056705042819206be133d5@mail.gmail.com>

On 28 Apr 2005 17:45:02 -0700, lpe <lpe at pycode.com> wrote:
> http://www.pycode.com
> 
> I was kinda suprised when I could not find any good sites with 3rd
> party modules (other than the Vaults of Parnassus, where you must host
> files elsewhere), so I decided to write one myself :)
> It is brand new and might still be buggy, but hopefully it will be
> usefull to some people.  Feel free to join and upload any of your code.
> thanks

Something wrong with PyPi?

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'


From paul at fxtech.com  Thu Apr 28 16:12:49 2005
From: paul at fxtech.com (Paul Miller)
Date: Thu, 28 Apr 2005 15:12:49 -0500
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <d4rf5e$ae5$1@gemini.csx.cam.ac.uk>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk> <wh8ce.142$%o.107@fed1read05>
	<d4rb04$209$1@gemini.csx.cam.ac.uk>
	<XFace.17198$UX1.12035@fe08.usenetserver.com>
	<d4rf5e$ae5$1@gemini.csx.cam.ac.uk>
Message-ID: <lsbce.16945$wr2.10247@fe60.usenetserver.com>

Michael Hoffman wrote:
> Paul Miller wrote:
> 
>> While on the subject, is there an equivalent for "methodcaller"?
>>
>> ie. if I want to bind a function which calls a specific method of an 
>> object with a specific parameter?
>>
> 
> def funccaller(func, *args, **kwargs):
>     def _return_func():
>         return func(*args, **kwargs)
>     return _return_func

...

> And this time I actually tested it, and it works! ;)

Wow! Amazing. Yer right, it works!

Man, I LOVE this language.



From davidb at mcs.st-and.ac.uk  Tue Apr 26 06:31:11 2005
From: davidb at mcs.st-and.ac.uk (davidb at mcs.st-and.ac.uk)
Date: 26 Apr 2005 03:31:11 -0700
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
	<mailman.2463.1114440684.1799.python-list@python.org>
Message-ID: <1114511471.754141.137680@z14g2000cwz.googlegroups.com>

Robin Becker wrote:
> rbt wrote:
> ......
> >
> > I just want to read PDF files in a portable way (windows, linux,
mac)
> > from within Python.
> >
> ......
>
> I suppose you mean extract PDF pages and do something with them.
> http://www.reportlab.com does have a tool that handles that in
> Python.
> It's not free though.

I imagine that you pay for a reasonable level of support.

> There are indeed a number of perl modules which do that and other
> modules which allow you to overprint etc etc.
>
> You can always hand translate one of the extract perl modules. They
> don't seem that hard. Alternatively put a good case to
> andy at reportlab.com.

Before embarking on that route, it might be worth looking at this page:

  http://phaseit.net/claird/comp.text.pdf/PDF_converters.html

There's a link to a (surprisingly recent) snapshot of my own package,
that can be used to read some PDF files, and another highly
recommended module. In the interests of balance, if not completeness,
I should also mention PDF Playground which has better support for
reading and writing PDF files:

  http://sourceforge.net/projects/pdfplayground/

Maybe this should also be listed on the above resources page. Cameron?
Are you reading this? ;-)

David



From phil at riverbankcomputing.co.uk  Tue Apr  5 05:14:48 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 5 Apr 2005 10:14:48 +0100 (BST)
Subject: Eric3 under WinXP
In-Reply-To: <i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
	<mailman.1366.1112689020.1799.python-list@python.org>
	<i6k451hocmq6kks0qdvta8v615eac7uf57@4ax.com>
Message-ID: <2888.82.68.80.137.1112692488.squirrel@river-bank.demon.co.uk>

> On Tue, 5 Apr 2005 09:17:05 +0100 (BST), "Phil Thompson"
> <phil at riverbankcomputing.co.uk> wrote:
>
>>> Hello NG,
>>>
>>> (Win XP)
>>>
>>> I have successfully installed pyqt, but not
>>> qtext, which I need to run Eric3.
>>> The PyQT demo files run fine.
>>>
>>> I've downloaded QScintilla, compiled via MS-VC,
>>> but (I suppose I need the SIG), to translate or provide
>>> the Python interface with pyd Files.
>>>
>>> Eric complains, that qtext is not found.
>>>
>>> Has anyone success with getting this to work and how?
>>>
>>> Many thanks in advance for possible answers,
>>
>>You haven't said which version of PyQt you are using. I guess it's the
>>non-commercial version based on Qt v2 - QScintilla (and therefore eric)
>>requires Qt v3.
>>
>>Phil
>
>
> Hello John and Phil,
>
> thank you for your answers.
>
> I have:
> PyQt 3.13 Qt v2.3 Non-commercial Edition
>
> I compiled:
> qscintilla-1.62-gpl-1.5.1\
> and the results seems ok
>
>
> qmake qscintilla.pro
> nmake
>
> for the qmake, I downloaded:
> Qt 3.3.4 Evaluation
>
>
> I installed also SIP.
> sip-4.2.1
>
> What steps are missing?

If you are using the evaluation version of Qt then you need the evaluation
version of PyQt. This already includes SIP and QScintilla.

Phil



From gry at ll.mit.edu  Tue Apr 12 13:47:17 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 12 Apr 2005 10:47:17 -0700
Subject: problem with the logic of read files
In-Reply-To: <68da8$425bf954$43461874$29054@nf1.news-service.com>
References: <68da8$425bf954$43461874$29054@nf1.news-service.com>
Message-ID: <1113328037.070319.136110@o13g2000cwo.googlegroups.com>


<m_t... at yahoo.com> wrote:
> I am new to python and I am not in computer science. In fact I am a
biologist and I ma trying to learn python. So if someone can help me, I
will appreciate it.
> Thanks
>
>
> #!/cbi/prg/python/current/bin/python
> # -*- coding: iso-8859-1 -*-
> import sys
> import os
> from progadn import *
>
> ab1seq = raw_input("Entrez le r?pertoire o? sont les fichiers ?
analyser: ") or None
> if ab1seq == None :
>     print "Erreur: Pas de r?pertoire! \n"
> "\nAu revoir \n"
>     sys.exit()
>
> listrep = os.listdir(ab1seq)
> #print listrep
>
> extseq=[]
>
> for f in listrep:
###### Minor -- this is better said as:  if f.endswith(".Seq"):
>      if f[-4:]==".Seq":
>          extseq.append(f)
> #         print extseq
>
> for x in extseq:
>      f = open(x, "r")
###### seq=... discards previous data and refers only to that just
read.
###### It would be simplest to process each file as it is read:
@@@@@@ seq=f.read()
@@@@@@ checkDNA(seq)
>      seq=f.read()
>      f.close()
>      s=seq
>
> def checkDNA(seq):
>     """Retourne une liste des caract?res non conformes ?
l'IUPAC."""
>
>     junk=[]
>     for c in range (len(seq)):
>         if seq[c] not in iupac:
>             junk.append([seq[c],c])
>             #print junk
>             print "ATTN: Il y a le caract?re %s en position %s " %
(seq[c],c)
>         if junk == []:
>              indinv=range(len(seq))
>              indinv.reverse()
>              resultat=""
>              for i in indinv:
>                  resultat +=comp[seq[i]]
>              return resultat
>
> seq=checkDNA(seq)
> print seq

##### The program segment you posted did not define "comp" or "iupac",
##### so it's a little hard to guess how it's supposed to work.  It
would
##### be helpful if you gave a concise description of what you want the

##### program to do, as well as brief sample of input data.
##### I hope this helps!  -- George
>
> #I got the following ( as you see only one file is proceed by the
function even if more files is in extseq
>
> ['B1-11_win3F_B04_04.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq']
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq',
'B1-19_win3F_F04_12.ab1.Seq']
> ..
> ['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq',
'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq',
'B1-19_win3F_F04_12.ab1.Seq', 'B1-19_win3R_G04_14.ab1.Seq',
'B90_win3F_H04_16.ab1.Seq', 'B90_win3R_A05_01.ab1.Seq',
'DL2-11_win3F_H03_15.ab1.Seq', 'DL2-11_win3R_A04_02.ab1.Seq',
'DL2-12_win3F_F03_11.ab1.Seq', 'DL2-12_win3R_G03_13.ab1.Seq',
'M7757_win3F_B05_03.ab1.Seq', 'M7757_win3R_C05_05.ab1.Seq',
'M7759_win3F_D05_07.ab1.Seq', 'M7759_win3R_E05_09.ab1.Seq',
'TCR700-114_win3F_H05_15.ab1.Seq', 'TCR700-114_win3R_A06_02.ab1.Seq',
'TRC666-100_win3F_F05_11.ab1.Seq', 'TRC666-100_win3R_G05_13.ab1.Seq']
>
> after this listing my programs proceed only the last element of this
listing (TRC666-100_win3R_G05_13.ab1.Seq)
>
>
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTCCCGAAGTGTCCCAGAGCAAATAAATGGACCAAAACGTTTTTAGAATACTTGAACGTGTAATCTCATTTTAA



From meh1963 at gmail.com  Sun Apr 24 03:46:46 2005
From: meh1963 at gmail.com (Matt Hayden)
Date: 24 Apr 2005 00:46:46 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
Message-ID: <1114328806.147822.64660@z14g2000cwz.googlegroups.com>

And y'all obviously don't care what kind of acoustic guitar your
god/gods/invisible cloud dwellers/space alien higher intelligence
plays.  Which is a slightly OT but otherwise generally on-topic post
for this NG.....

Sad that you don't care about the important stuff.



From Zhuanshi.He at gmail.com  Sun Apr 17 11:48:31 2005
From: Zhuanshi.He at gmail.com (Zhuanshi He)
Date: 17 Apr 2005 08:48:31 -0700
Subject: How to compile ScientificPython-2.4.9 under XP cygwin environment?
Message-ID: <a13c8f1c.0504170748.4d28cb0c@posting.google.com>

Dear All,

I try to compile ScientificPython-2.4.9
(http://starship.python.net/~hinsen/ScientificPython/) under Windows XP
cygwin environment using python 2.3.3 ,and gcc (GCC) 3.3.3 (cygwin
special).

The information shows as fillows:

----------------------------------------------------------
Using netCDF installation in  /usr/local
running build
running build_py
running build_ext
building 'Scientific_netcdf' extension
gcc -shared -Wl,--enable-auto-image-base
build/temp.cygwin-1.5.10-i686-2.3/Src/Scientific_netcdf.o
-L/usr/local/lib -L/usr/lib/python2.3/config -lnetcdf -lpython2.3 -o
build/lib.cygwin-1.5.10-i686-2.3/Scientific/cygwin/Scientific_netcdf.dll

build/temp.cygwin-1.5.10-i686-2.3/Src/Scientific_netcdf.o(.text+0x6eb):
In function `initScientific_netcdf':
/cygdrive/c/pygmt/ScientificPython-2.4.9/Src/Scientific_netcdf.c:2050:
undefined reference to `_ncopts'
build/temp.cygwin-1.5.10-i686-2.3/Src/Scientific_netcdf.o(.text+0x3067):
In function `netcdf_seterror':
/cygdrive/c/pygmt/ScientificPython-2.4.9/Src/Scientific_netcdf.c:46:
undefined reference to `_ncerr'
collect2: ld returned 1 exit status
error: command 'gcc' failed with exit status 1
------------------------------------------------

Does anyone meet same problem?


--
Zhuanshi He / Z. He
Advanced Environmental Monitoring Research Center (ADEMRC)
Gwangju Institute of Science and Technology (GIST)
1 Oryong-dong, Puk-gu, Gwangju 500-712, South Korea
Tel: +82-(0)62-970-3406
Fax: +82-(0)62-970-3404


From radam2_ at _tampabay.rr.com  Mon Apr 18 17:59:25 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Mon, 18 Apr 2005 21:59:25 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <mailman.2065.1113858260.1799.python-list@python.org>
Message-ID: <dn88615e447ajai00rec6ip6t2trf8iaj5@4ax.com>

On Mon, 18 Apr 2005 14:06:08 -0700, "Robert Brewer"
<fumanchu at amor.org> wrote:

>Reinhold Birkenfeld wrote:
>> >y = (f(11, 22, x=1, y='y for f') *
>> >     g(*args_from_somewhere,
>> >       x='x for g', y='y for g',
>> >       foo=lambda: return 'foo for g'))
>> >
>> >would be my current way to express this. But still, the less lines,
>> >the less confusing it is.
>
>And Ron Adam replied:
>> I would probably do it this way.
>> 
>> y = f(11, 22, x=1, y='y for f') 		\
>>          * g( *args_from_somewhere,
>>               x='x for g', 
>>               y='y for g',
>>               foo=lambda: return 'foo for g' )
>
>Which are both prettier, until you actually try to use them:
>
>>>> g( *args_from_somewhere, x='x for g', y='y for g', foo=lambda:
>return 'foo for g' )
>Traceback (  File "<interactive input>", line 1
>    g( *args_from_somewhere, x='x for g', y='y for g', foo=lambda:
>return 'foo for g' )
>                             ^
>SyntaxError: invalid syntax
>

I didn't test that particular part..  but this should work.  It wasn't
the fault of the formatting. ;-)

def f(a,b,x=None,y=None):
    return 1
    
def g( args,x=None,y=None,foo=None):
    return 1

args_from_somewhere = (23,24)

y = f(11, 22, x=1, y='y for f') 		\
         * g( args_from_somewhere,
              x='x for g', 
              y='y for g',
              foo=lambda foo: 'foo for g' )

print y

1


>
>Robert Brewer
>MIS
>Amor Ministries
>fumanchu at amor.org



From bearophileHUGS at lycos.com  Fri Apr  1 08:34:11 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Apr 2005 05:34:11 -0800
Subject: Pseudocode in the wikipedia
Message-ID: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>

The free wikipedia is adopting a standard pseudocode:
http://en.wikipedia.org/wiki/Wikipedia_talk:Wikicode/Specification

MShonle says something nice:
I support the idea of wikicode. Basically I think we should present
code in a Python-like language that doesn't carry so much baggage. For
example, we can use English sentences (or sentence fragments) instead
of requiring the reader to understand some obscure Python library.
(Further, Python has the baggage that there are no block-terminators:
i.e., no "}" or "end"s or "fi"s or "repeat"s. By adding such
terminators, we can make it a lot less ambiguous to all readers.) In
otherwords, we're basically right on track: removing the quirks of
Python, and making it higher-level.

Bearophile



From robin at reportlab.com  Thu Apr 28 04:07:02 2005
From: robin at reportlab.com (Robin Becker)
Date: Thu, 28 Apr 2005 08:07:02 +0000
Subject: regex over files
In-Reply-To: <mailman.2611.1114656019.1799.python-list@python.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<mailman.2611.1114656019.1799.python-list@python.org>
Message-ID: <427099A6.8030604@jessikat.fsnet.co.uk>

Skip Montanaro wrote:
......
> 
> I'm not sure why the mmap() solution is so much slower for you.  Perhaps on
> some systems files opened for reading are mmap'd under the covers.  I'm sure
> it's highly platform-dependent.  (My results on MacOSX - see below - are
> somewhat better.)
> 

I'll have a go at doing the experiment on some other platforms I have 
available. The problem is certainly paging related. Perhaps the fact 
that we don't need to write dirty pages is moot when the system is 
actually writing out other processes' pages to make room for the 
incoming ones needed by the cpu hog. I do know that I cannot control 
that in detail. Also it's entirely possible that file caching/readahead 
etc etc can skew the results.

All my old compiler texts recommend the buffered read approach, but that 
might be because mmap etc weren't around. Perhaps some compiler expert 
can say? Also I suspect that in a low level language the minor overhead 
caused by the book keeping is lower than that for the paging code.

> Let me return to your original problem though, doing regex operations on
> files.  I modified your two scripts slightly:
> 
......
> I took the file from Bengt Richter's example and replicated it a bunch of
> times to get a 122MB file.  I then ran the above two programs against it:
> 
>     % python tscan1.py splitX
>     n=2112001 time=8.88
>     % python tscan0.py splitX
>     n=2139845 time=10.26
> 
> So the mmap'd version is within 15% of the performance of the buffered read
> version and we don't have to solve the problem of any corner cases (note the
> different values of n).  I'm happy to take the extra runtime in exchange for
> simpler code.
> 
> Skip

I will have a go at repeating this on my system. Perhaps with Bengt's 
code in the buffered case as that would be more realistic.

It has been my experience that all systems crawl when driven into the 
swapping region and some users of our code seem anxious to run huge 
print jobs.
-- 
Robin Becker


From radam2 at tampabay.rr.com  Sat Apr  2 14:28:41 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 19:28:41 GMT
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112459975.790455.122900@z14g2000cwz.googlegroups.com>
Message-ID: <6eqt41pu0m7l7f2mtoi0sg6ebbntn3u2kv@4ax.com>

On 2 Apr 2005 08:39:35 -0800, "Kay Schluehr" <kay.schluehr at gmx.net>
wrote:

>
>There is actually nothing mysterious about decorators. 

I've heard this quite a few times now, but *is* quite mysterious if
you are not already familiar with how they work.  Or instead of
mysterious, you could say complex, as they can be used in quite
complex ways.

What is missing most with them is some really good documentation. I
got the basic idea and syntax of decorators down right away, but ran
into problems implementing them because, the structure of the
functions being used for the decorators wasn't clear.

>It is nothing
>more than ordinary function composition, executed when the decorated
>function is defined. In case of Your definition it, the composition
>rules are:
>
>decorator("Goodbye")(func)(s) = get_function(func)(s) = wrapper(s),
>where wrapper stores "Goodbye" in the local d_arg.

It worked as a model, but I mixed in concepts from cstacks and
function calls, which apparently isn't correct.  I posted another
model, it should be a bit closer. (with the Subject line spelled
correctly, continue this thread there. ;)

>Or a bit more formally we state the composition principle:
>
>Args x Func -> Func, where decorator() is a function of Args, that
>returns a function Func -> Func. As Guido had shown recently in his
>Artima blog, Func need not be an instance of an ordinary function but
>can be a function-object like his MultiMethod :
>
>http://www.artima.com/weblogs/viewpost.jsp?thread=101605

I read this, this morning it was very interesting. 

>It is also possible to extend this view by "chaining" decorators.
>
>decorator : Args(2) x (Args(1) x Func - > Func ) -> Func.
>
>To understand decorator chains it is very helpfull to accept the
>functional view instead of arguing in a procedural picture i.e. pushing
>and popping arguments onto and from the stack.

Understanding chains is next on my list. :)

>Someone asked once for a solution of the following problem that is
>similar in character to Guidos multimethod but some more general.
>
>def mul(m1,m2):
>    def default(m1,m2):
>        return "default",1+m1*m2
>    def mul_dec(m1,m2):
>        return "mul_dec",Decimal(str(m1))*Decimal(str(m2))
>    def mul_float(m1,m2):
>        return "mul_float",m1*m2
>    return (default,mul_dec,mul_float)
>
>The function mul defines the inner functions default, mul_float and
>mul_dec. What we want is a unified access to this functions by means of
>mul. Guidos solution would decompose mul in three different versions of
>mul:

This is similar to c++'s polymorphism which I've played with nearly 10
years ago. I generally found it useful only in small doses even then.
I seem to think now that c++'s version of it was implemented at
compile time, with each function call being matched up with the
correct function, by the argument types.  Where as Guido's version, is
dynamic and handles the situation at run time.  I may not be correct
in this, it's been a while.

>@multimethod(int,float)
>def mul(m1,m2):
>    return m1*m2
>
>@multimethod(float,float)
>def mul(m1,m2):
>    return m1*m2
>
>
>@multimethod(Decimal,Decimal)
>def mul(m1,m2):
>    return m1*m2
>
>but it is hard to tell, what should be done if no argument tuple
>matches.

It could then invoke the adapt() function to determine if a possible
single way to continue is available.  But with that you could run into
some very subtle bugs.  Or just annoying windows like behavior, such
as a word processor auto correcting a word when don't want it to.

>An attempt like:
>
>@multimethod(object,object)
>def mul(m1,m2):
>    return 1+m1*m2
>
>would be useless, because there is no concrete match of argument types
>onto (object,object).
>
>So I introduced an "external switch" over argument tuples, using a
>decorator chain:
>
>@case(None,"default")
>@case((float,float),'mul_float')
>@case((int,float),'mul_float')
>@case((Decimal,Decimal),'mul_dec')
>
>def mul(m1,m2):
>    def default(m1,m2):
>        return "default",1+m1*m2
>    def mul_dec(m1,m2):
>        return "mul_dec",Decimal(str(m1))*Decimal(str(m2))
>    def mul_float(m1,m2):
>        return "mul_float",m1*m2
>    return (default,mul_dec,mul_float)
>
>Can You imagine how "case" works internally?
>
>Regards,
>Kay

Sure, That should be fairly straight forward. Although I can imagine
several ways of implementing it at the moment. I think after I play
with decorator chains, one way will probably stand out as being
cleaner than the others.

Cheers,
Ron



From nick at craig-wood.com  Tue Apr 19 05:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 19 Apr 2005 09:30:02 GMT
Subject: Nokia to speak at Python-UK next week
References: <mailman.1909.1113491601.1799.python-list@python.org>
	<slrnd67hjt.lvd.nick@irishsea.home.craig-wood.com>
	<du7zmvvgtfg.fsf@lehtori.cc.tut.fi>
Message-ID: <slrnd69hhu.2jg.nick@irishsea.home.craig-wood.com>

Ville Vainio <ville at spammers.com> wrote:
> >>>>> "Nick" == Nick Craig-Wood <nick at craig-wood.com> writes:
> 
>     Nick> Not entirely on topic, but does anyone know if there is a
>     Nick> series 80 python?  Or if the series 60 python runs on a
>     Nick> series 80 phone (eg communicator 9300/9500)?
> 
>  Nope & nope. It would be easy-ish to get Python working on a console
>  level on 9300/9500 if there was access to the source code...

Ah well...  Well hopefully someone from c.l.py will go to the talk and
can report back on progress on series 80 python.

>  There's also an open source implementation of Python for UIQ (UI
>  toolkit used by SonyEricsson)
> 
>  See
> 
>  http://www.mobilewhack.com/programming/python/

Interesting web site - thanks.

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


From der_tank at web.de  Tue Apr 19 03:24:32 2005
From: der_tank at web.de (Sven Kobow)
Date: Tue, 19 Apr 2005 07:24:32 +0000
Subject: Tiny fonts in wxPython app
In-Reply-To: <1113860411.942144.54520@g14g2000cwa.googlegroups.com>
References: <42641a4f_2@news.arcor-ip.de>
	<1113860411.942144.54520@g14g2000cwa.googlegroups.com>
Message-ID: <426495e4_2@news.arcor-ip.de>

Jeff Reavis wrote:
> Sven,
> It may be the default gtk font settings. This can be changed in the
> .gtkrc file.
> 
> -jjr
> 
I'm not sure but the gnome font in general looks okay? Could be
something about proportional fonts? Or maybe a Unicode issue? I read
something about that.

Sven


From nick at craig-wood.com  Sat Apr  2 00:38:37 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 02 Apr 2005 05:38:37 GMT
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
	<7xsm2e7kg7.fsf@ruckus.brouhaha.com>
	<slrnd4igas.20i.apardon@rcpc42.vub.ac.be>
	<7xvf7aws6c.fsf@ruckus.brouhaha.com>
	<slrnd4ijtf.20i.apardon@rcpc42.vub.ac.be>
	<7xvf79ehf9.fsf@ruckus.brouhaha.com>
	<slrnd4kq5v.20i.apardon@rcpc42.vub.ac.be>
	<7xhditlckv.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd4rbep.l2j.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
>  Antoon Pardon <apardon at forel.vub.ac.be> writes:
> > I'm not sure that this would be an acceptable approach. I did the man
> > semop and it indicates this is part of system V IPC. This makes me
> > fear that semaphores will use file descriptors or other resources
> > that are only available in a limited amount. Not usefull if you are
> > talking about thousands of threads.
> 
>  That would be terrible, if semaphores are as heavy as file descriptors.
>  I'd like to hope the OS's are better designed than that.

I believe futex is the thing you want for a modern linux.  Not
very portable though.

>From futex(4)

       The  Linux  kernel  provides  futexes  ('Fast  Userspace muTexes') as a
       building block for fast userspace locking and semaphores.  Futexes  are
       very  basic  and lend themselves well for building higher level locking
       abstractions such as POSIX mutexes.

       This page does not  set  out  to  document  all  design  decisions  but
       restricts  itself to issues relevant for application and library devel-
       opment. Most programmers will in fact not be using futexes directly but
       instead  rely  on  system  libraries  built  on  them, such as the NPTL
       pthreads implementation.

       A futex is identified by a piece of memory which can be shared  between
       different  processes.  In  these  different processes, it need not have
       identical addresses. In its bare form, a futex has semaphore semantics;
       it  is  a  counter  that can be incremented and decremented atomically;
       processes can wait for the value to become positive.

       Futex operation is entirely userspace for the non-contended  case.  The
       kernel  is  only  involved to arbitrate the contended case. As any sane
       design will strive for non-contension, futexes are also  optimised  for
       this situation.

       In  its  bare form, a futex is an aligned integer which is only touched
       by atomic assembler instructions. Processes can share this integer over
       mmap,  via shared segments or because they share memory space, in which
       case the application is commonly called multithreaded.

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


From cam.ac.uk at mh391.invalid  Wed Apr 27 05:45:05 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 27 Apr 2005 10:45:05 +0100
Subject: names of methods, exported functions
In-Reply-To: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
References: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
Message-ID: <d4nmv1$f5d$1@gemini.csx.cam.ac.uk>

Mayer wrote:

> Is there a way to see at the python prompt the names of all the public
> methods of a class or the names exported by a module? I know that
> GUI-based IDEs have a nifty way of displaying these in the form of a
> drop-down list, but I'm looking for some function or method that will
> simply return a list of strings.

Modules generally do not export names[1]. You import a module and 
perhaps specific names within the module. The module can specify which 
names are "public" by the use of the underscore naming convention and 
the magic __all__ name, which can contain a list of those names which 
will be imported by default through "from module import *."

That said, dir() is the function you are looking for. If you want to 
restrict to only methods on the class, and not just all attributes, 
you'll have to check the type of each attribute.
-- 
Michael Hoffman

[1] OK, I have written modules that set a variable in __main__ using 
sys.modules but other than that...


From shama.bell at gmail.com  Fri Apr  1 12:51:27 2005
From: shama.bell at gmail.com (shama.bell at gmail.com)
Date: 1 Apr 2005 09:51:27 -0800
Subject: numeric module
In-Reply-To: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
Message-ID: <1112377887.071234.83730@z14g2000cwz.googlegroups.com>

In function test(),
Read wi and bi as:
wi = val >> 4
bi = val & 0xFL

-SB



From nyamatongwe+gravity at gmail.com  Thu Apr 14 18:24:18 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Thu, 14 Apr 2005 22:24:18 GMT
Subject: Using python from a browser
References: <mailman.1928.1113506375.1799.python-list@python.org>
Message-ID: <MPG.1cc9988eccb9eaf7989689@news-server>

Philippe:

> I read that IE had the capability to embedd Python scripts, but what 
> about the others ?

   While Python can be set up as a scripting language for IE, this is 
normally disabled as it could be a security hole. The open call is 
available from Python scripts so a web site could read or destroy your 
files.

   Neil


From steve at holdenweb.com  Tue Apr 12 08:58:41 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 08:58:41 -0400
Subject: Cannot import mod_python modules
In-Reply-To: <6c9897c2.0504120255.1f274@posting.google.com>
References: <6c9897c2.0504120255.1f274@posting.google.com>
Message-ID: <d3ggfk$i2b$2@sea.gmane.org>

Mark wrote:
> Hi, I've just installed the Win32 build of mod_python 3.1.4 for Python
> 2.4 and have setup my Apache config file with the LoadModule and
> PythonHandler directives and then copied "mod_python.so" to my Apache
> modules directory.
> 
> I restarted Apache and decided to do a quick cgi.test() and it shows
> that mod_python listed under server software section.
> 
> OK, next I tried mptest.py, but I get an Internal Server Error. The
> traceback recorded in the error log says "No module named _apache"
> 
> mptest.py:
> 
> from mod_python import apache
> 
> def handler(req):
>     req.write("Hello World!")
>     return apache.OK
> 
> Why doesn't this work? or rather what have I missed?

Usually this is a permissions issue, often because you installed 
mod_python as a non-administrator.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From deetsNOSPAM at web.de  Wed Apr 20 10:18:51 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 20 Apr 2005 16:18:51 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <d45oca$gj9$03$2@news.t-online.com>

> Personnaly I would like to have the choice. Sometimes I prefer to
> start at 0, sometimes at 1 and other times at -13 or +7.


Subclass from builtin list - and make the necessary adjustmenst yourself in
an overloaded __getitem__.

-- 
Regards,

Diez B. Roggisch


From dan at dontspammecauseidontlikit.com  Sun Apr 17 23:18:35 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Mon, 18 Apr 2005 11:18:35 +0800
Subject: Apache mod_python
Message-ID: <np866115k5mee8odb7msitsr03npskcqjf@4ax.com>


I've been writing a server application in Python.  The app listens on
a socket and interfaces to a database.

Now I'd like to write a web application to also access the database.
It seems natural to use Python.  I've installed mod_python (Debian
libapache2-mod-python2.3, mod_python 3.1.3-4).

My question is, how mature/stable is mod_python?  Is it suitable for a
production environment?  The documentation is a bit lacking, and I've
found some errors in the demo example where it looks like the link
should work, but it doesn't. (Could well be something I'm doing.).
I've also noted that there's still work being done on it.

Thanks.

Dan


From werner_DOT_merkl_ at _fujitsu_DASH_siemens.com  Wed Apr 13 08:14:38 2005
From: werner_DOT_merkl_ at _fujitsu_DASH_siemens.com (Werner Merkl)
Date: Wed, 13 Apr 2005 14:14:38 +0200
Subject: Has Python 2.4.1 changed implementation for __init__.py???
In-Reply-To: <mailman.1831.1113393802.1799.python-list@python.org>
References: <d3j0uc$fak$1@nntp.fujitsu-siemens.com>
	<mailman.1831.1113393802.1799.python-list@python.org>
Message-ID: <d3j2ff$ol5$1@nntp.fujitsu-siemens.com>

Fredrik Lundh wrote:
> Werner Merkl wrote:
> 
> 
>>I just downloaded http://www.python.org/pypi/xexpr/0.02, installed
>>if (python setup.py install) and tried the example in the README file.
>>
>>Than I got following error: AttributeError: 'module' object has no attribute 'Read'
>>
>>This is same behavior for all module using empty __init__.pr files,
>>like venster, Pyrex or libxmlmods...
> 
> 
> if "xexpr" is a package with an empty __init__.py file, the behaviour you're
> seeing is the expected behaviour.  importing a toplevel module doesn't auto-
> matically import any submodules.
Oh, I see. I have to write:
import xexpr.Read

Now it works...
> 
> 
>>Is there a change in the implementation, so that every module needs an
>>explicit list for exchanged modules?
> 
> 
> what's an "exchanged module"?
Oops! This should say "every module"...

Thanx a lot
Werner
> 
> 
>>EXAMPLE
>>------------------------------------------------------------------------
>>
>>Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on win32
>>Type "help", "copyright", "credits" or "license" for more information.
>>
>>>>>import xexpr
>>>>>example = '<foo a="b" c="d"><bar><baz a="d" />Blah</bar></foo>'
>>>>>xexpr.Read.to_xexpr(example)
>>
>>Traceback (most recent call last):
>>  File "<stdin>", line 1, in ?
>>AttributeError: 'module' object has no attribute 'Read'
>>
> 
> does it work better if you type
> 
>     import xexpr.Read
> 
> before you call the to_xexpr function?
> 
> </F> 
> 
> 
> 


From http  Sun Apr 17 05:35:47 2005
From: http (Paul Rubin)
Date: 17 Apr 2005 02:35:47 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
	<Vmp8e.66673$Ze5.4755611@phobos.telenet-ops.be>
	<mailman.2019.1113729837.1799.python-list@python.org>
Message-ID: <7xr7h9sq30.fsf@ruckus.brouhaha.com>

Dick Moores <rdm at rcblue.com> writes:
> >C:\cygwin\bin\bc -l > pi12.txt
> 
> But how or when do you enter the lines
> 
> scale = 3000
> obase = 12
> print 4 * a(1)

You could put them into a file, say pi.bc.  Then run
  bc -l pi.bc


From enjoy_linux at hotmail.com  Thu Apr 14 02:03:20 2005
From: enjoy_linux at hotmail.com (MaHahaXixi)
Date: Thu, 14 Apr 2005 14:03:20 +0800
Subject: how to explain such codes, python's bug or mine?
References: <d3iqhe$1s0l$1@mail.cn99.com><d3irjm$msg$1@scotsman.ed.ac.uk>
	<1113389164.495602.86170@f14g2000cwb.googlegroups.com>
Message-ID: <d3l344$2gp9$1@mail.cn99.com>

yes, i use the 2th way
<ajikoe at gmail.com> wrote in message
news:1113389164.495602.86170 at f14g2000cwb.googlegroups.com...
> Hi
>
> The second style can be used:
>    j = range(20)
>   print j
>   L = [x for x in j if x > 10]
>   j = L
>
> There are another method such poping the item based on last index to 0:
>  for i in range(len(j)-1,0-1,-1):
>     if j[i]<=10:
>       j.pop(i)
>
>  print j
>
> Pujo
>




From nospam at here.com  Mon Apr 11 09:53:55 2005
From: nospam at here.com (Matt Feinstein)
Date: Mon, 11 Apr 2005 09:53:55 -0400
Subject: My stupid newbie mistake
Message-ID: <k00l51dagrs1b1cq8pam1ac8vht2v6t3rp@4ax.com>

I named a file 'try.py' and then was stumped, for a while, when

>>> import try

gave a syntax error... So, how about a
'YouAreUsingAReservedWordStupid' exception ?

Matt Feinstein

--
There is no virtue in believing something that can be proved to be true.


From gandalf at geochemsource.com  Thu Apr  7 17:05:36 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 23:05:36 +0200
Subject: curious problem with large numbers
In-Reply-To: <qnkfyy2gwc4.fsf@arbutus.physics.mcmaster.ca>
References: <mailman.1503.1112903288.1799.python-list@python.org>
	<qnkfyy2gwc4.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <4255A0A0.1030404@geochemsource.com>

I thought it will be the same for FreeBSD, but here are the results:

FreeBSD 4.8 with Python 2.3.4

Python 2.3.4 (#2, Nov 10 2004, 05:08:39)
[GCC 2.95.4 20020320 [FreeBSD]] on freebsd4
Type "help", "copyright", "credits" or "license" for more information.
 >>> inf = 1e308*2
 >>> inf
Inf
 >>> float('Inf')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for float(): Inf
 >>>



FreeBSD 4.8 with Python 2.4

Python 2.4 (#2, Jan 27 2005, 17:11:08)
[GCC 2.95.4 20020320 [FreeBSD]] on freebsd4
Type "help", "copyright", "credits" or "license" for more information.
 >>> inf = 1e308*2
 >>> inf
Inf
 >>> float('Inf')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: invalid literal for float(): Inf
 >>>



-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From roy at panix.com  Wed Apr 20 09:36:51 2005
From: roy at panix.com (Roy Smith)
Date: Wed, 20 Apr 2005 09:36:51 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <roy-30EA18.09365120042005@reader1.panix.com>

Antoon Pardon <apardon at forel.vub.ac.be> wrote:

> Personnaly I would like to have the choice. Sometimes I prefer to
> start at 0, sometimes at 1 and other times at -13 or +7.

Argggh.  Having two (or more!) ways to do it, would mean that every time I 
read somebody else's code, I would have to figure out which flavor they are 
using before I could understand what their code meant.  That would be evil.

What would actually be cool is if Python were to support the normal math 
notation for open or closed intervals.  Any of the following would make 
sense:

foo = bar (1, 2)
foo = bar (1, 2]
foo = bar [1, 2)
foo = bar [1, 2]

That would certainly solve this particular problem, but the cost to the 
rest of the language syntax would be rather high :-)


From tim at tt1lock.org  Sat Apr 23 11:54:44 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Sat, 23 Apr 2005 15:54:44 GMT
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
Message-ID: <IFEpJ8.7MG@bath.ac.uk>

fuzzylollipop <jarrod.roberson at gmail.com> wrote or quoted:

> try spelling license correctly next time and heading the google
> suggestions that probably looked like "didn't you mean : Python License"

How do you spell license correctly?
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From mrovner at propel.com  Tue Apr 26 13:40:56 2005
From: mrovner at propel.com (Mike Rovner)
Date: Tue, 26 Apr 2005 10:40:56 -0700
Subject: How to pass a arg of object to python's script in a c++ program?
In-Reply-To: <d4l14i$2vjm$1@mail.cn99.com>
References: <d4l14i$2vjm$1@mail.cn99.com>
Message-ID: <426E7D28.5040700@propel.com>

Couple notes:
- boost.python issues better discuss in comp.lang.python.c++ group;
- debug your extension from python first, then embed it
- don't call PyFinalize()

zghelp wrote:
> but the exception occur when run to "print t.greet()"
> 
> How can I solve it?

Providing exception text will be helpful.

Mike



From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 11:49:14 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 16:49:14 +0100
Subject: preallocate list
In-Reply-To: <GpSdndGkpZxpqsDfRVn-hw@comcast.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j6p7$ntl$1@scotsman.ed.ac.uk>
	<GpSdndGkpZxpqsDfRVn-hw@comcast.com>
Message-ID: <d3jf0e$onk$1@scotsman.ed.ac.uk>

Steven Bethard wrote:
> Jim wrote:
..
>> OK. I've just tried with 4 lines and the code works. With 11000 lines 
>> it uses all CPU for at least 30 secs. There must be a better way.
> 
> 
> Was your test on *just* this function?  Or were you doing something with 
> the list produced by this function as well?
> 
> STeVe

Well it's fast enough now. Thanks for having a look.

Jim


From fredrik at pythonware.com  Tue Apr 19 02:55:53 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 19 Apr 2005 08:55:53 +0200
Subject: Proposal: an unchanging URL for Python documentation
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
Message-ID: <d429q1$mk7$1@sea.gmane.org>

"Steve" <steve at ferg.org> wrote:

> I propose that an additional a URL be set up for the Python HTML
> documentation.  This URL will always contain the current version of the
> documentation.  Suppose we call it "current".  Then (while 2.4 is still
> the current version)  the documentation for the os module would also be
> available at
> http://python.org/doc/current/lib/module-os.html.

did you check that link before you posted it?

</F> 





From pinard at iro.umontreal.ca  Mon Apr  4 19:42:00 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Mon, 4 Apr 2005 19:42:00 -0400
Subject: sparse sets of integers?
In-Reply-To: <1112656112.650114.261720@z14g2000cwz.googlegroups.com>
References: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
	<1112656112.650114.261720@z14g2000cwz.googlegroups.com>
Message-ID: <20050404234200.GA11766@alcyon.progiciels-bpi.ca>

[runes]

> You have sets in Python 2.3x and 2.4x. I don't know if they can handle
> your amounts of data, but i guess so.

The original poster (OP) spoke about 10**13 numbers, if I remember
correctly (I did not keep the original message).  It all depends on the
real sparsity of the spare sets! :-) If not sparse enough, this might be
a bit inordinate for standard Python sets on most machines, also given
that each Python integer uses a lot more than 4 bytes...

On the other hand, the OP also wrote that the numbers he handles are
grouped in big and compact intervals, separated by big unpopulated
holes.  So maybe his data could be represented in Python as a
user-written type hiding a sorted list of intervals, for which it should
be relatively easy to write set functions.  That might make the problem
tractable enough, with reasonably speedy processing.

As last resort, the wanted sets could be represented as sorted files of
numbers.  Slower, but set operations would also be easy to write.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From jerf at jerf.org  Mon Apr  4 17:26:50 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Mon, 04 Apr 2005 16:26:50 -0500
Subject: testing -- what to do for testing code with behaviour dependant
	upon which files exist?
References: <424F00D5.9020205@po-box.mcgill.ca> <d2o44f$q1e$1@sea.gmane.org>
	<mailman.1321.1112648615.1799.python-list@python.org>
Message-ID: <pan.2005.04.04.21.26.42.319488@jerf.org>

On Mon, 04 Apr 2005 17:02:20 -0400, Brian van den Broek wrote:
> Jeremy suggested using a directory name akin to 
> "C:\onlyanidiotwouldhavethisdirecotrynameonadrive". That is what I had 
> settled on before I posted. Somehow it feels unhappy and inelegant. 
> But, I'm a bit less uncomfortable with it seeing that others have done 
> so, too.

To be clear, I would actually suggest
"onlyanidiotwouldhavethisdirecotrynameonadrive"... note the lack of C:\,
which would be platform specific, as would any other root specification.
Take advantage of the fact that every system I know of makes relative
directories easy, and also note you can work out what directory the
"current file" is in with a combination of __file__ and os.getcwd() (and
that while that won't work if someone changes the working directory,
that's bad form and IIRC breaks some other things in Python as well, so
don't do that). 

Making it a relative directory may make it look just as bad, but it is in
some sense somewhat less inelegant; at that point, if someone is creating
that directory in the test directory of your app, they're just fooling
with you, and you don't really have to worry about people who maliciously
make your unit tests fail under most circumstances... :-)


From mwinrock at frontiernet.net  Sun Apr  3 14:00:30 2005
From: mwinrock at frontiernet.net (Mark Winrock)
Date: Sun, 03 Apr 2005 18:00:30 GMT
Subject: text analysis in python
In-Reply-To: <mailman.1255.1112523725.1799.python-list@python.org>
References: <mailman.1255.1112523725.1799.python-list@python.org>
Message-ID: <2bW3e.2777$hg.2203@news01.roc.ny>

Maurice Ling wrote:
> Hi,
> 
> I'm a postgraduate and my project deals with a fair bit of text 
> analysis. I'm looking for some libraries and tools that is geared 
> towards text analysis (and text engineering). So far, the most 
> comprehensive toolkit in python for my purpose is NLTK (natural language 
> tool kit) by Edward Loper and Steven Bird, followed by mxTextTools. Are 
> there any OSS tools out there that is more comprehensive than NLTK?
> 
> In the Java world, there is GATE (general architecture for text 
> engineering) and it seems very impressive. Are there something like that 
> for Python?
> 
> Thanks in advance.
> 
> Cheers
> Maurice
> 
> 

You might try http://web.media.mit.edu/~hugo/montylingua/

"Liu, Hugo (2004). MontyLingua: An end-to-end natural
language processor with common sense. Available
at: web.media.mit.edu/~hugo/montylingua."


From Scott.Daniels at Acm.Org  Tue Apr 12 09:25:55 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 12 Apr 2005 06:25:55 -0700
Subject: some sort of permutations...
In-Reply-To: <mailman.1749.1113309679.1799.python-list@python.org>
References: <9468aec7.0504112228.5d018278@posting.google.com>	<d3fq51$iho$1@sea.gmane.org>
	<mailman.1749.1113309679.1799.python-list@python.org>
Message-ID: <425bc6e9$1@nntp0.pdx.net>

Bill Mill wrote:
> On Apr 12, 2005 2:37 AM, Fredrik Lundh <fredrik at pythonware.com> wrote:
> 
>>"Bernard A." wrote:
>>>i'm looking ... to have all possible length fixed n-uples from a list...
>>... http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465
> And, while I'm asking that question, is there a good reference for
> finding such algorithms? Do most people keep an algorithms book handy?
Volume 4 of Knuth's TAOCP (The Art of Computer Programming) is about
combinatorics.  Fascicle 2 is out and relevant.  Admittedly buying
fascicles is a bit like buying a long chapter at a time, but it is
chock-a-block with great stuff. I paid about twenty bucks a fascicle.

--Scott David Daniels
Scott.Daniels at Acm.Org


From onurb at xiludom.gro  Thu Apr 14 06:26:04 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Thu, 14 Apr 2005 12:26:04 +0200
Subject: A beginer question about SOAP and Python:
 <SOAPpy.Types.structType HashStringResponse at 23909440>: {}
In-Reply-To: <4c-dnVn7LJL3p8HfRVn-sw@rogers.com>
References: <4c-dnVn7LJL3p8HfRVn-sw@rogers.com>
Message-ID: <425e453d$0$6793$626a14ce@news.free.fr>

Jim wrote:
> Hi all,
> 
> I am new to SOAP and Python. I am practicing
> learning SOAP with Python. I sent a request
> and I got the following response:
> 
> <SOAPpy.Types.structType HashStringResponse
> at 23909440>: {}
> 
> 
> What does that mean? 

Seems like you've got a SOAPpy.Types.structType instance that is named 
HashStringResponse, that is located at memory address 23909440, and that 
looks like an empty dict.

> and how can I print the
> result hash string ?

I don't know. I've never played with SOAP, so I don't even know if this 
(HashStringResponse) is part of the standard SOAP api or if it's 
specific to the service you're calling.

Did you look at the SOAPpy api for the description of Types.structType ?

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


From tzot at sil-tec.gr  Mon Apr 25 10:46:57 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 25 Apr 2005 17:46:57 +0300
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<d4iv1b$mfn$1@solaris.cc.vt.edu>
Message-ID: <vi0q61pu6ou038asoc0okleerhg92ni8ic@4ax.com>

On Mon, 25 Apr 2005 10:32:11 -0400, rumours say that rbt
<rbt at athop1.ath.vt.edu> might have written:

>I do not seek to provoke. Sorry if my question comes across that way to you.

Thanks for giving attention to my post, no need for apologies.

By the way, you didn't say in which way ReportLab and pdflib are not
helpful to you (packages suggested directly by Mike Meyer and indirectly
by me).
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From harold.fellermann at upf.edu  Fri Apr  1 04:54:16 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Fri, 1 Apr 2005 11:54:16 +0200
Subject: class attributes and inner classes in C extensions
Message-ID: <26f807b9d58f39d1ae191249a187caf4@upf.edu>

Hello,

I just posted this question with a wrong subject... So here again with 
a better one.

I am working on a C extension module that implements a bunch of 
classes. Everything
works fine so far, but I cannot find any way to implement class 
attributes or inner
classes. Consider you have the following lines of Python :

class Foo :
	class Bar :
		pass

      spam = "foobar"

How can this class be translated to a C extension? Is there anything 
comparable to
PyMethodDef that can be used for other attributes than functions?

Thanks for your help,

- harold -

--
Always remember that you are unique;
just like everyone else.
--



From peter at rt.sk  Wed Apr 27 16:51:46 2005
From: peter at rt.sk (Peter Szinek)
Date: Wed, 27 Apr 2005 22:51:46 +0200
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <426FFB62.9070501@rt.sk>

What about eric? (btw afaik it is not listed among the python.org 
editors, or have i overlooked it)? I have installed it today only, so do 
not kill me if it's crap, i am just asking ;-) however it looks 
promising... (at least after IDLE)

I have been using PyDev for some time, but i think it is not always very 
handsome (e.g. writing a 5-line script in vim needs less time than 
eclipse startup ;-) otoh, for 5line scripts i am using vim anyway...

monkey wrote:
> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
> 
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.
> 
> 
> 



From dscottr at bellatlantic.net  Thu Apr 28 20:03:53 2005
From: dscottr at bellatlantic.net (Scott Robinson)
Date: Fri, 29 Apr 2005 00:03:53 GMT
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
	<rv9ce.663204$w62.545894@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <f6f371dlije97anaebo5odkgkb0bk79p5p@4ax.com>

On Thu, 28 Apr 2005 17:58:47 GMT, Charles Krug
<cdkrug at worldnet.att.net> wrote:

>On 28 Apr 2005 10:34:44 -0700, demon_slayer2839 at yahoo.com
><demon_slayer2839 at yahoo.com> wrote:
>> Hey yall,
>> I'm new to Python and I love it. Now I can get most of the topics
>> covered with the Python tutorials I've read but the one thats just
>> stumping me is Object Orientation. I can't get the grasp of it. Does
>> anyone know of a good resource that could possibly put things in focus
>> for me? Thanks.
>> 
>
>"Learning Python" (Lutz/Ascher) has a good discussion of the basics.
>
>Unfortunately, most of the OOP writings I've read fall into two
>catagories:  Trivial examples where you say, "But why Bother??" and
>examples that you don't understand until you've some OO design under
>your belt and can understand what it's all good for.
>
>Objects are, at the end of the day, data and the accompanying methods.
>Once you've read the various tutorials take a stab at converting a
>problem you know well into objects.
>
>You'll get it wrong at first.  Most everyone does.  Don't sweat it.
>Eventually, you'll just "get" it.

[Note:  this is just the start of an explanation.  If you don't
understand OOP, just try programming that way (yes, I got it wrong to
see my usage of "Wally objects").  

This is something I thought of awhile ago, and wondered where I could
use it.  My background is a hardware guy who first learned spaghetti
coding in basic on 8-bits, received the wisdom of modular programming
when learning assembler, then much later tried his hand teaching
himself python.  Those from other backgrounds may be amused at my
naivete.]
 
I've been trying to figure out the "Dilbert" view of OOP.

My first objects were like C types:

	class Super_object:
		pass

Consider this the Wally object.

	Wally=Super_object():

Things get put on his desk:

	Wally.MeetingActionItems=[1,2,3]

And stay there.  At first, this seems great.  It gives you plenty of
desks to store data on.

After a while, you might paint yourself into a corner (such as wanting
to append to lists, but later wish to hard limit the number of
entries, thus needing to change from a list to an overloaded object).
This brings the Dilbert object.  You can put things on Dilbert's desk,
but unlike Wally, he can actually notice the objects, manage them, and
do some work on it.

Class Dilbert_object:
	__init__(self):
		ActionItems=[]
	def AddItems(self,items):
		self.ActionItems.append(items)
	
	def DoAction(self):
		return self.ActionItems.pop()	

Ok, I admit that this just looks like yet another getter and setter.
Maybe this is an Asok object and Dilbert would realize that the Boss
doesn't remember everything on his desk, so we change it to:

Class Dilbert_object:
	__init__(self):
		ActionItems=[]
	def AddItems(self,items):
		self.ActionItems.append(items)
		if len(self.ActionItems)>10:
		self.ActionItems.pop(0)	
	def DoAction(self):
		return self.ActionItems.pop()	

Since OOP dogmatists insist that inheritance is vital to OOP, we
include the Alice object.  Alice can do everything Dilbert can do, and
then some.  To include Dilbert's skills we simply include

	Class Alice_object(Dilbert_object):

To add new things to the Alice object:

	Class Alice_object(Dilbert_object):
		def FistOfDeath(self):
			import os
			os._exit(0)


The critical thing is that you can now let Dilbert manage your data.
That's one of the main reasons for inventing computers anyway, to
manage data.  So write subprograms (objects) that do your work for
you, and work as thanklessly as Dilbert, and then try to concentrate
on debugging the big picture.

Scott



From joe at inwap.com  Tue Apr 12 07:02:20 2005
From: joe at inwap.com (Joe Smith)
Date: Tue, 12 Apr 2005 04:02:20 -0700
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <F4CdnYojx8MiN8bfRVn-2w@comcast.com>

Xah Lee wrote:

> of motherf***ing irrevalent drivel?

I am greatly amused.
A troll impersonating Xah Lee has made xah look like a total moron.
LOL


From fdreger at amiga.pl  Sun Apr 24 13:01:44 2005
From: fdreger at amiga.pl (Filip Dreger)
Date: Sun, 24 Apr 2005 19:01:44 +0200
Subject: func_code vs. string problem
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
	<d4easv$rgm$1@nemesis.news.tpi.pl>
	<QvKdnZAEj5TEKfffRVn-oQ@comcast.com>
	<d4ef1b$ml4$1@nemesis.news.tpi.pl>
	<FL2dnap6a5snXPffRVn-1g@comcast.com>
Message-ID: <d4gjld$3pm$1@nemesis.news.tpi.pl>


Uzytkownik "Steven Bethard" <steven.bethard at gmail.com> napisal w 
wiadomosci news:FL2dnap6a5snXPffRVn-1g at comcast.com...
> Any reason you can't define it like:
>
> class actor(object):
>     def __init__(self):
>         self.roles = []
>     def act(self):
>         for role_func in self.roles:
>             role_func(self)
[snip]
> By importing actor, they have full access to the global namespace of 
> the actor.actor object, by simply accessing the actor module 
> attributes.
>
> So the issue here is really about full *local* namespace access.  Do 
> you really need *full* local namespace access?  Why isn't access to 
> the actor.actor instance sufficient?

!!! Yep, of course it is sufficient. Abondoning the obvious 
role_func() must have had some good reasons some time ago, but now I 
can not even remember them, probably they were not so important :-)
Thanks a million,
Filip 




From scott at leerssen.com  Thu Apr 14 13:04:43 2005
From: scott at leerssen.com (Scott Leerssen)
Date: Thu, 14 Apr 2005 13:04:43 -0400
Subject: Python-list Digest, Vol 19, Issue 209
In-Reply-To: <20050413164143.40C601E401B@bag.python.org>
References: <20050413164143.40C601E401B@bag.python.org>
Message-ID: <b6f760c35a03992f3ca75e2ec02ea64e@leerssen.com>


On Apr 13, 2005, at 12:41 PM, python-list-request at python.org wrote:

> From: Scott Leerssen <scott at leerssen.com>
> Date: April 13, 2005 12:29:35 PM EDT
> To: python-list at python.org
> Subject: unstatisfied symbols building Python 2.4.1 on HP-UX 10.20
>
>
> I'm trying to build Python 2.4.1 on HP-UX 10.20 and get the following  
> during linking:
>
> /usr/ccs/bin/ld: Unsatisfied symbols:
>    PyThread_acquire_lock (code)
>    PyThread_exit_thread (code)
>    PyThread_allocate_lock (code)
>    PyThread_free_lock (code)
>    PyThread_start_new_thread (code)
>    PyThread_release_lock (code)
>    PyThread_get_thread_ident (code)
>    PyThread__init_thread (code)
>
>
> I tried adding the -D_REENTRANT flag to OPTS as suggested in the  
> README, but that didn't seem to help/harm.  I searched the python  
> lists and found lots of folks commiserating on HP-UX building, but no  
> solutions other than building with '--without-threads', which simply  
> isn't an option for me.  Any hints?
>

*blush*

Actually, the box on which I was building was HP 11.11.  I finally  
googled up a reference and this helped:

http://mail.python.org/pipermail/python-bugs-list/2005-January/ 
027083.html
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From wolfgang.keller.nospam at gmx.de  Sat Apr 16 02:38:09 2005
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Sat, 16 Apr 2005 08:38:09 +0200
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <gemini.if113l00hr0yd02vs.wolfgang.keller.nospam@gmx.de>

> If there is any interest on this, please let me know so we can work on
> getting this as a real port.

"Interest" is just a "slight" understatement... :-)

Best regards

Wolfgang Keller

-- 
P.S.: My From-address is correct


From sjmachin at lexicon.net  Sun Apr 10 00:41:45 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 10 Apr 2005 14:41:45 +1000
Subject: Are circular dependencies possible in Python?
References: <IEosBE.GtB@bath.ac.uk>
Message-ID: <me9h51lhsiprfsaqntuqitpadjhecc2t1c@4ax.com>

On Sat, 9 Apr 2005 15:57:15 GMT, Tim Tyler <tim at tt1lock.org>  wrote:

>Like C, Python seems to insist I declare functions before calling
>them

One is left wondering what gave you that impression about Python.
Nothing could be further from the truth. The only construct in Python
that smells anything like a declaration is the wartish "global". The
Python philosophy is that everything is dynamic. You don't muck about
with declarations; you just get on with the job. See example below,
where we have a list of functions, which of course all follow the same
protocol, but what that protocol is is of no concern of the Python
compiler.

def nothing_to_declare(data_fields, validation_funcs, other_info):
    for k, fld in enumerate(data_fields):
	validation_funcs[k](fld, k, other_info)

Aside: How many iterations would it take for the average C programmer
to get the declaration for "validation_funcs" correct?

Others have pointed out that "def" is executed. So is "class". An OO
example of dynamism would be a bit longer, but would involve creating
classes on the fly and stuffing into them whatever methods are
required for the task at hand.

HTH,

John



From cam.ac.uk at mh391.invalid  Thu Apr 28 15:56:26 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 28 Apr 2005 20:56:26 +0100
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <XFace.17198$UX1.12035@fe08.usenetserver.com>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk> <wh8ce.142$%o.107@fed1read05>
	<d4rb04$209$1@gemini.csx.cam.ac.uk>
	<XFace.17198$UX1.12035@fe08.usenetserver.com>
Message-ID: <d4rf5e$ae5$1@gemini.csx.cam.ac.uk>

Paul Miller wrote:

> While on the subject, is there an equivalent for "methodcaller"?
> 
> ie. if I want to bind a function which calls a specific method of an 
> object with a specific parameter?
> 

def funccaller(func, *args, **kwargs):
     def _return_func():
         return func(*args, **kwargs)
     return _return_func

class Test1(object):
     def __init__(self, x):
         self.x = x
     def method(self, a, b, c):
         return self.x + a + b + c

t1 = Test1(42)

funccaller_result = funccaller(t1.method, 3, 4, c=5)
funccaller_result()

And this time I actually tested it, and it works! ;)
-- 
Michael Hoffman


From codecraig at gmail.com  Thu Apr 14 15:00:10 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 12:00:10 -0700
Subject: distribute python script
In-Reply-To: <vPmdnUKBSeVrIcPfRVn-1Q@comcast.com>
References: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>
	<vPmdnUKBSeVrIcPfRVn-1Q@comcast.com>
Message-ID: <1113505210.693247.143930@z14g2000cwz.googlegroups.com>

sure....i posted another thread eariler, which explains much more
related to py2exe..check that out and let me know if that helps.

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/4071921987be308d



From mahs at telcopartners.com  Thu Apr 21 13:06:24 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 21 Apr 2005 10:06:24 -0700
Subject: Array of Chars to String
In-Reply-To: <42673B51.4040804@v.loewis.de>
References: <mailman.2133.1113942800.1799.python-list@python.org>
	<42673B51.4040804@v.loewis.de>
Message-ID: <d48m9h$7m8$1@sea.gmane.org>

Martin v. L?wis wrote:
> Apparently nobody has proposed this yet:
> >>>filter(letters.__contains__, astr)
> 'Bad'
> 
> >>>filter(set(letters).__contains__, astr)
> 'Bad'


Everyone is seeking early PEP 3000 compliance ;-)

filter wins on conciseness - it's short enought to use in-line, but for a fair 
speed comparison, I've wrapped it in a function, below; str.translate is far 
ahead on speed for all but the shortest strings:

def func_translate1(s, letters, table=string.maketrans("","")):
     return s.translate(table, table.translate(table, letters))

def func_filter1(s, letters):
     in_set = letters.__contains__
     return filter(in_set, s)

def func_filter2(s, letters):
     in_set = set(letters).__contains__
     return filter(in_set, s)


  >>> for m in (1, 10, 100, 1000, 10000):
  ...     s = "Bob Carol Ted Alice" * m
  ...     letters = "adB"
  ...     print "List length: %s" % len(s)
  ...     print shell.timefunc(func_translate1, s, letters)
  ...     print shell.timefunc(func_filter1, s, letters)
  ...     print shell.timefunc(func_filter2, s, letters)
  ...
  List length: 19
  func_translate1(...)  64179 iterations, 7.79usec per call
  func_filter1(...)  63706 iterations, 7.85usec per call
  func_filter2(...)  45336 iterations, 11.03usec per call
  List length: 190
  func_translate1(...)  54950 iterations, 9.10usec per call
  func_filter1(...)  12224 iterations, 40.90usec per call
  func_filter2(...)  10737 iterations, 46.57usec per call
  List length: 1900
  func_translate1(...)  22760 iterations, 21.97usec per call
  func_filter1(...)  1293 iterations, 386.87usec per call
  func_filter2(...)  1184 iterations, 422.52usec per call
  List length: 19000
  func_translate1(...)  3713 iterations, 134.67usec per call
  func_filter1(...)  137 iterations, 3.67msec per call
  func_filter2(...)  124 iterations, 4.05msec per call
  List length: 190000
  func_translate1(...)  426 iterations, 1.18msec per call
  func_filter1(...)  14 iterations, 38.29msec per call
  func_filter2(...)  13 iterations, 40.59msec per call
  >>>

Michael



From bill.mill at gmail.com  Thu Apr 14 12:41:49 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Thu, 14 Apr 2005 12:41:49 -0400
Subject: A little request about spam
In-Reply-To: <d3m5li$md8$1@sea.gmane.org>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<e724b24405041407021decd1c4@mail.gmail.com>
	<797fe3d405041408506aab4d13@mail.gmail.com>
	<d3m5li$md8$1@sea.gmane.org>
Message-ID: <797fe3d40504140941564bbadf@mail.gmail.com>

On 4/14/05, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Bill Mill wrote:
> 
> > > Maybe we should contact the gmail admins?
> >
> > I've already contacted the gmail admins. There was no response.
> 
> have you tried reading the newsgroup via
> 
>     http://groups-beta.google.com/group/comp.lang.python
> 
> while being logged in to your gmail account?
> 

Yup, I don't like that interface *nearly* as much as I do the gmail
interface. In gmail, I see threads as their subject headers, lined up
neatly. Threads which I've read are dimmed, and ones I haven't are
bolded. I see people's real email addresses . Threads in which I have
a personal conversation with one of the authors pop up to the top when
a private email comes in. Spam ("The greatest news ever!") is filtered
out, and up until recently, it was very successful.

In short, the groups-beta interface is very inadequate compared to the
gmail one.

Peace
Bill Mill
bill.mill at gmail.com

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


From rknair77 at gmail.com  Mon Apr 25 03:28:43 2005
From: rknair77 at gmail.com (Ram)
Date: Mon, 25 Apr 2005 12:58:43 +0530
Subject: help needed :-pgdb givig error
Message-ID: <709b4926050425002850d4df3a@mail.gmail.com>

Dear All
 I am very new to python . i would appreciate any help from you all on
this problem which i am facing.

I am trying to connect to postgres from python.for this i am using
something like " import pgdb". i am able to connect to postgres and
fetch data , if i execute the python file directly in unix prompt.
However when i try to do thsi through broeser iam getting the
following error..
Traceback (most recent call last):
  File "/opt/tools/cvs/htdocs/viewcvs/cgi/test.cgi", line 5, in ?
    import sys,string,os,pgdb
  File "/usr/local/lib/python2.3/site-packages/pgdb.py", line 62, in ?
    from _pg import *
ImportError: ld.so.1: /usr/local/bin/python: fatal: libpq.so.3: open
failed: No
such file or directory
premature end of script headers...

I have python2.3 and 2.4 installed , of which pgdb.py and pg.py is  installed in
/usr/local/lib/python2.3/site-packages . Please help me out how to solve this
 when i give $python it is going to python 2.3.3. I also have the
shared library _pg.so in the same directory.

Luv
Ram


From stnchris at xmission.com  Tue Apr 19 18:45:12 2005
From: stnchris at xmission.com (Steve Christensen)
Date: Tue, 19 Apr 2005 22:45:12 +0000 (UTC)
Subject: Utah Python Users Group
References: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>
	<d3k8ur$2vi$1@vegh.ks.cc.utah.edu>
	<mailman.1863.1113438478.1799.python-list@python.org>
Message-ID: <slrnd6b2fo.2d.stnchris@xmission.xmission.com>

In article <mailman.1863.1113438478.1799.python-list at python.org>, Ivan Van Laningham wrote:
> Hi All--
> 
> Matthew Thorley wrote:
>> 
>> lugal wrote:
>> > Is anyone aware if there's a Utah-based Python User Group? If not, does
>> > any else from Utah have any interest in forming a Utah-based Python
>> > User Group?
>> >
>> I'm in Utah, I don't know of any groups but I might be interested.
>>
>  
> Ditto.
> 

I'm interested as well.

-Steve
-- 
So if you people can't figure out what my birthday is based on subtle
hints and vague statements made at random intervals then I'm beginning
to think that you really don't care. -- Dean Lenort, a.r.k.


From codecraig at gmail.com  Tue Apr 19 14:02:47 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 11:02:47 -0700
Subject: XML-RPC -- send file
In-Reply-To: <mailman.2122.1113933410.1799.python-list@python.org>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
	<1113930209.259905.112850@o13g2000cwo.googlegroups.com>
	<mailman.2122.1113933410.1799.python-list@python.org>
Message-ID: <1113933767.439552.169130@g14g2000cwa.googlegroups.com>

Experient I have been :)

Here is what I am getting now....

CLIENT
-----------
d = xmlrpclib.Binary(open("C:\\somefile.exe").read())
server.sendFile(d)

SERVER
--------------
def sendFile(tmp):
    print "FILE:", tmp

The server receives the file, because it prints it out, but on the
client I get this....

xmlrpclib.Fault: <Fault 1: 'exceptions.TypeError:cannot marshal None
unless allow_none is enabled'>

so it sends it, but the client is getting an error.  The error occurs
on the, server.sendFile(d) line.

any ideas?



From kay.schluehr at gmx.net  Tue Apr  5 13:47:10 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 5 Apr 2005 10:47:10 -0700
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<1112687665.297515.231430@o13g2000cwo.googlegroups.com>
	<42526c32.357421755@news.oz.net>
Message-ID: <1112723230.556648.239160@f14g2000cwb.googlegroups.com>

Bengt Richter wrote:

> From the 2.4 Grammar, the key part seems to be
>
>     decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
>     decorators: decorator+
>     funcdef: [decorators] 'def' NAME parameters ':' suite
>
> and further on
>
>     dotted_name: NAME ('.' NAME)*
>
> So the Python Grammar's name for the @-expression is just plain
"decorator"
> which conflicts with my English-based reading of the word ;-/

What about playing with the words decorator/decoration? The allegoric
meaning of the decorator

def deco(f):
    pass

would be: f is "vanishing under decoration" - all is vanity.

In the example deco would be both a decorator and a decoration. In
other examples deco were a decorator and deco(x,y) the decoration.

Regards,
Kay



From claudio.grondi at freenet.de  Mon Apr  4 13:09:43 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 4 Apr 2005 17:09:43 -0000
Subject: (win32) speedfan api control
References: <Kln3e.13905$e06.7165@twister.socal.rr.com><3b8m2tF6enbpaU1@individual.net>
	<mailman.1291.1112618988.1799.python-list@python.org>
Message-ID: <3bd3m8F6ii16oU1@individual.net>

>>It makes me curious if I can get also the
>>temperatures into Python script for
>>further processing

> Winspector is good for this kind of thing.

Thanks for the link to Winspector - with this
tool it's really easy to find out the names
required to get down to the window elements
of a running application.

In the special case of speedfan there seems
to be no way to get the temperatures shown
in Reading tab into a Python script, because
the texts with the temperature values are not
separate window elements. The only
message sent to "TJvPanel" (it's the class
of the element with the temperatures)  is
WM_PAINT with 0, 0 values, so the actual
temperatures are "hidden" from beeing
accessed as easy as the value of the
checkbox.
Knowing the rectangle of the "TJvPanel"
it should be probably possible to OCR
the text shown, but this is another story.

By the way: is there a free tool (primary
for Windows, but best for both Linux
and Windows) able to get the text of the
word under the current mouse pointer
position like it is done e.g. by Babylon
translator?

Claudio


"Simon Brunning" <simon.brunning at gmail.com> schrieb im Newsbeitrag
news:mailman.1291.1112618988.1799.python-list at python.org...
> On Apr 3, 2005 1:52 AM, Claudio Grondi <claudio.grondi at freenet.de> wrote:
> > May I ask how did you get the
> > "TJvXPCheckbox" and the other
> > values necessary to access the program
> > GUI ? (as I can see, there is no source
> > code of SpeedFan available) ?
>
> Winspector is good for this kind of thing.
>
> http://www.brunningonline.net/simon/blog/archives/001320.html
>
> -- 
> Cheers,
> Simon B,
> simon at brunningonline.net,
> http://www.brunningonline.net/simon/blog/





From roy at panix.com  Thu Apr 21 11:23:49 2005
From: roy at panix.com (Roy Smith)
Date: 21 Apr 2005 11:23:49 -0400
Subject: recording data between [ and ]
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<d48fc1$2rm$00$1@news.t-online.com>
Message-ID: <d48gi5$cho$1@panix2.panix.com>

Diez B. Roggisch <deetsNOSPAM at web.de> wrote:
>> Yes, it does... may take me a few minutes to get my head around it
>> though. Why do re's have to be so arcane and complicated... especially
>> in Python?
>> 
>> It's hard to preach 'ease of use' with stuff such as this in the
>> language. Perhaps one day it can be rolled up into something that
>> *really* is easy to understand:
>
>Welcome to the wonderful world of programming. Regular expressions are what
>they are because they are modeled after a certain theory - that of finite
>state automata and their correspondence to certain classes of
>grammars.

Another way to look at it is that RE's are a programming language of
their own, and Python just provides an interface to it, just like it
provides interfaces to databases, network protocols, and operating
systems.

RE's predate Python by many years (at least as far back as the early
70's in a form we would recognize today), and have evolved over the
decades to become more powerful.  Unfortunately, with power came
arcane syntax.  On the good side, most of the time you can use a
smallish subset of the full RE syntax and still have some pretty
powerfull pattern matching.

Python's motto is "there's one way to do it".  Sometimes that means
"let's do it the way everybody else does it instead of reinventing it
ourselves".  The Python RE module is certainly an example of that.

BTW, there's a pretty good Wikipedia article on RE's
(http://en.wikipedia.org/wiki/Regular_expression).


From tmj at SPAMLESSjarmania.com  Sat Apr  9 14:55:06 2005
From: tmj at SPAMLESSjarmania.com (Tim Jarman)
Date: Sat, 09 Apr 2005 19:55:06 +0100
Subject: How to detect if file is a directory
References: <mailman.1627.1113072050.1799.python-list@python.org>
Message-ID: <3bqmofF6di925U1@individual.net>

C?sar Leonardo Blum Silveira wrote:

> Hello all, I'm new to this list.
> 
> How can I detect if a file is a directory or not?
> 
> Thanks
> 
> C?sar

The os module contains many helpful tools for working with files,
directories, links and so forth. Check out the docs and marvel. The
following snippet answers your specific question:

<code>
import os.path

if os.path.isdir("/some/path/here"):
    print "It's a directory!"
</code>
-- 
Website: www DOT jarmania FULLSTOP com


From nyamatongwe+gravity at gmail.com  Wed Apr 13 19:14:19 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Wed, 13 Apr 2005 23:14:19 GMT
Subject: terminate exectutioin in PythonWin
References: <d3j265$ne6$1@scotsman.ed.ac.uk>
	<MPG.1cc7cd342ff0eccc989687@news-server>
	<d3j909$o60$1@scotsman.ed.ac.uk>
Message-ID: <MPG.1cc852a021f38c3c989688@news-server>

Jim:

> Great thanks! PythonWin isn't hot on keyboard shortcuts but ironically 
> calls this a KeyboardInterrupt :|

   I don't think the keyboard can be accessed in this situation so the 
icon is provided.

> Know any keyboard shortcuts for debug view? e.g. open it, run(debug), 
> step etc.

   No, I use PythonWin just as a console and prefer HAP Debugger 
although it hasn't been updated for Python 2.4.
http://hapdebugger.sourceforge.net/

   Neil


From hancock at anansispaceworks.com  Fri Apr 22 19:25:53 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 18:25:53 -0500
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114208333.622909.179640@l41g2000cwc.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>
Message-ID: <200504221825.53617.hancock@anansispaceworks.com>

On Friday 22 April 2005 05:18 pm, mehmetmutigozel at gmail.com wrote:
> Thanx for your replies.
> 
> I'm looking for array of functions.
> Something like a=[ sin(x) , cos(x) ]

You had a list of lambda functions in your first post and in the
subject line still. How is that not what you wanted?

If you want an *answer*, you need to ask a *question*. 

Perhaps you don't know how to call such functions?  E.g.:

a=[ lambda t: t**n for n in range(4) ]

>>> a[2](3)
27

If you want to see *names* for the functions, you have two
choices: either used named functions, 

def unity(t): return 1
def identity(t): return t
def square(t): return t**2
def cube(t): return t**3
a = [unity, identity, square, cube]

>>> a
[<function unity at 0x401e609c>, <function identity at 0x401e6b54>,
<function square at 0x401e6b8c>, <function cube at 0x401e6ca4>]

or replace the list with a dictionary, e.g.:

a = dict([('t**%d' % n, lambda t: t**n) for n in range(4)])

>>> a
{'t**0': <function <lambda> at 0x401e6bc4>, 't**1': <function <lambda> at 0x401e6bfc>, 
't**2': <function <lambda> at 0x401e6c34>, 't**3': <function <lambda> at 0x401e6c6c>}
>>> a.keys()
['t**0', 't**1', 't**2', 't**3']
>>> a['t**3'](4)
64



--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From nick at craig-wood.com  Thu Apr 14 11:30:06 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 14 Apr 2005 15:30:06 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<1113430615.592715.78440@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd5t1ii.rds.nick@irishsea.home.craig-wood.com>

mensanator at aol.com <mensanator at aol.com> wrote:
>  I'm using GMPY (see code).
[snip]

If you are using gmpy you might as well do it like this.....

gmpy.pi() uses the Brent-Salamin Arithmetic-Geometric Mean formula for
pi IIRC.  This converges quadratically, and it will calculate you a
million places without breaking a sweat.

>>> import gmpy
>>> from math import log
>>> bits = int(3003*log(12)/log(2))
>>> pi=gmpy.pi(bits+100)
>>> gmpy.fdigits(pi, 12, 3003)
'3.184809493b918664573a6211bb151551a05729290a7809a492742140a60a55256a0661a03753a3aa54805646880181a3683083272bbba0a370b12265529a828903b4b256b8403759a71626b8a54687621849b849a8225616b442796a31737b229b2391489853943b8763725616447236b027a421aa17a38b52a18a838b01514a51144a23315a3009a8906b61b8b48a62253a88a50a43ba0944572315933664476b3aabb77583975120683526b75b462060bb03b432551913772729a2147553531793848a0402b999b5058535374465a68806716644039539a8431935198527b9399b112990abb0383b107645424577a51601b3624a88b7a676a3992912121a213887b92873946a61332242217aa7354115357744939112602ba4b888818a3269222b528487747839994ab223b65b8762695422822669ba00a586097842a51750362073b5a768363b21bb1a97a4a194447749399804922175a068a46739461990a2065bb0a30bbab7024a585b1a84428195489784a07a331a7b0a1574565b373b05b03a5a80a13ab87857734679985558a5373178a7b28271992a3894a5776085083b9b238b2220542462888641a2bab8b3083ab49659172a312b78518654494a068662586a181835a64440b2970a122813975898815367208905801032881449223841428763329617531239b9a657405584014534390b587625606bb80923795944b43757a431b039556282978a6a49590553490ba1844947175637a908247b50127722464441380a852b0847b5813019bb70a67663b426565434069884476132193344ba55a2128a03838974606b851b2979321a408067225a5aa4b3464a1a17473595333909ab9127079655b3164b68b9b28a9b818a220a025ab0934203995b7a62a7aa739355340539ba3182905b193905603a43b660b9426a92294697144a896a5b2339358bb2b7294bb89635b071a6351211360b820b1882ab8433b54757b87a373284b1ba182a10326476b369a4a6365b58b8018994bb152556765475a704bb94b6b2a39458971a8b90512786b5029404818644323552916170b3abb7363496427b088b68725a68570040617949289077b278069a09b559324b8a66828b40549b0296065b2300330592569a7b76b92ba1293585b6a9b604567a0901362856373b4b56897946256b4172b1b50474351364749a33996a81ba8847347a8411b850b79a03018291672aa0945656a159aa6aa0a845531a592005b8a34366b882257107b190969a846474836a9800750778920ba797297a2791101b0685a86bb704b9baa17b055293679843b35215b0a8b1182b611953b080aa5431b219907a8448a81b1a9493245676b88013b470335240859594158621014216619553246570601967448b470174b9244892444817453865a4003b5aa7176451aab90681a949786154aa040477382ba69371041710b8728458a23979252b254236753a44a1900aa283536a227648812525743868b410a567794663359a6726a5286783328135114789b7645505b047848020a730a9557b206776aa56a19682744107901306b29008808619866b4911a05264b872a46b5376383932699531b449195640b62a63622830886247a47b3957169861239358041aa281333622aa15912b0a636047a489bb0726282a78b96671b27305a9652496b9b999011a7ba36898891665b1a6009058978850a21b01a158a1473b84a192b8672542a2a7056581995207a436a5b3ba2824637a3112abb57176468206a071200a327b3216425148100786502aa21236abb35499277670a1269730583403b1922a483856007301983989159bb688a58b602339806b63002a339a50b0ba533b84827793913081070a32595a101803a9a20234691b1a0b623274b69b0b44688195169461059543a252bb05208720ba13118266a872b26b9b584959b45179519534b221a335a2bb6971b3276b3a63a5b791723109b176529bb90651584279b7825712521b8269800738b07a62b14547884414451224092937165625696557a78799a82126613535a36b410309b759976119777b895801074b9779b9b5137538b2799951012273399bb818b722 at 0'

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


From codecraig at gmail.com  Fri Apr 15 13:00:35 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 10:00:35 -0700
Subject: py2exe - create one EXE
In-Reply-To: <1113582492.351604.257570@z14g2000cwz.googlegroups.com>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<mailman.1977.1113579964.1799.python-list@python.org>
	<1113580317.027071.183640@z14g2000cwz.googlegroups.com>
	<1113582492.351604.257570@z14g2000cwz.googlegroups.com>
Message-ID: <1113584435.451325.271380@o13g2000cwo.googlegroups.com>

I tried the installer v6...and i generated a spec, and i built the
exe...when i run the exe i get a error popup window from Windows asking
me to send an Error report.

The warnings that were generated during the build all appear to be
"ignorable" as the documentation mentions.

any ideas?



From beliavsky at aol.com  Sun Apr 10 12:17:19 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 10 Apr 2005 09:17:19 -0700
Subject: UselessPython 2.0
References: <Pokerface.1na1cc@no-mx.tacticalgamer.com>
Message-ID: <1113149839.081297.10330@o13g2000cwo.googlegroups.com>

Nice idea for a site, but I suggest renaming it to something like
FunPython.com . My guess from reading the subject of your message was
that you hated Python! Besides, "fun" is shorter than "useless" and is
therefore more Pythonic :).



From bernadal2008 at yahoo.fr  Tue Apr 12 02:28:02 2005
From: bernadal2008 at yahoo.fr (Bernard A.)
Date: 11 Apr 2005 23:28:02 -0700
Subject: some sort of permutations...
Message-ID: <9468aec7.0504112228.5d018278@posting.google.com>

hello,

i'm looking for a way to have all possible length fixed n-uples from a
list, i think generators can help, but was not able to do it myself,
maybe some one could point me out to an idea to do it ?

for example, from :
l = [0, 1, 2, 3, 4]

and searching for n-uples of 3, i should produce :
(
(0, 1, 2),
(0, 1, 3),
(0, 1, 4),
(0, 2, 3),
(0, 2, 4),
(0, 3, 4),
(1, 2, 3),
(1, 2, 4),
(1, 3, 4),
(2, 3, 4),
)

does the set module or itertools can help in such cases ? i still have
missed the black magic behind itertools...

best regards


From writeson at charter.net  Tue Apr  5 10:30:57 2005
From: writeson at charter.net (writeson)
Date: 5 Apr 2005 07:30:57 -0700
Subject: pagecrawling websites with Python
In-Reply-To: <mailman.1232.1112443928.1799.python-list@python.org>
References: <1112385491.601719.67420@o13g2000cwo.googlegroups.com>
	<mailman.1232.1112443928.1799.python-list@python.org>
Message-ID: <1112711457.494277.157240@f14g2000cwb.googlegroups.com>

Swaroop,

Thanks for the reply, I'll take a look at HarvestMan and see if we can
use it directly, or get some ideas from the source code. :)

Doug



From lbates at syscononline.com  Wed Apr 20 13:57:40 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 20 Apr 2005 12:57:40 -0500
Subject: Resolving 10060, 'Operation timed out'
In-Reply-To: <1114018777.408294.304200@z14g2000cwz.googlegroups.com>
References: <1114018777.408294.304200@z14g2000cwz.googlegroups.com>
Message-ID: <42669814.9000104@syscononline.com>

My manual says that socket has a settimeout(value) but I don't
seem to find anything on socket.setdefaulttimeout method you
refer to.

<snip>
settimeout( value)

Set a timeout on blocking socket operations. The value argument can be a
nonnegative float expressing seconds, or None. If a float is given, subsequent
socket operations will raise an timeout exception if the timeout period value
has elapsed before the operation has completed. Setting a timeout of None
disables timeouts on socket operations. s.settimeout(0.0) is equivalent to
s.setblocking(0); s.settimeout(None) is equivalent to s.setblocking(1). New in
version 2.3.

-Larry Bates



willitfw wrote:
> Does anyone know how to prevent this error from occurring: IOError:
> [Errno socket error] (10060, 'Operation timed out').
> 
> I am using the following code without any luck.  Obviously I am missing
> something.
> 
> import socket
> socket.setdefaulttimeout(20)
> 
> Thank you in advance.
> 
> Tom Williams
> 


From newsgroups at jhrothjr.com  Thu Apr 21 18:16:42 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 21 Apr 2005 17:16:42 -0500
Subject: goto statement
References: <mailman.2158.1113989043.1799.python-list@python.org>
Message-ID: <116g9lcqj767c6f@news.supernews.com>

"praba kar" <prabapython at yahoo.co.in> wrote in message 
news:mailman.2158.1113989043.1799.python-list at python.org...
> Dear All,
>
>   In Python what is equivalent to goto statement

Sheesh! It took 20 days for this to get to my mail server!

John Roth

>
> regards,
> praba



From cam.ac.uk at mh391.invalid  Fri Apr 15 14:48:10 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 15 Apr 2005 19:48:10 +0100
Subject: eval function not working how i want it dag namn
In-Reply-To: <d3on01$cq8$02$2@news.t-online.com>
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
	<d3olf8$7s7$1@gemini.csx.cam.ac.uk>
	<d3on01$cq8$02$2@news.t-online.com>
Message-ID: <d3p29c$4rn$1@gemini.csx.cam.ac.uk>

Peter Otten wrote:
> Michael Hoffman wrote:
> 
>>>def list_members(obj)
>>>l = dir(obj)
>>>return map(lambda x : eval('obj.'+x), l)
>>
>>That works fine for me with Python 2.4.
> 
>>>>x.question = "Are you sure?"

I should clarify. It works fine for me when I've already globally 
assigned obj to something else. D'oh!
-- 
Michael Hoffman


From vze4rx4y at verizon.net  Thu Apr 21 05:46:26 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 21 Apr 2005 09:46:26 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
	<slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2178.1114006723.1799.python-list@python.org>
	<slrnd6ei0q.ge8.apardon@rcpc42.vub.ac.be>
	<9LI9e.28173$1p4.20603@trndny06>
	<slrnd6eof7.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <SDK9e.22142$nt3.10484@trndny04>

> > [Antoon Pardon]
> >> I don't see why the start index can't be accessible through
> >> a method or function just like the length of a list is now.
> >>
> >> My favourite would be a range method so we would have
> >> the following idiom:
> >>
> >>   for i in lst.range():
> >>     do something with lst[i]
> >
> > After going to all that trouble, you might as well also get the value at
that
> > position:
> >
> > for i, x in enumerate(lst):
> >     do something with lst[i] also known as x
>
> No you wouldn't, enumerate always starts with 0.

You don't get it.  Your proposed list-like class indicates its start index.
enumerate() can be made to detect that start value so that the above code always
works for both 0-based and 1-based arrays.


Raymond Hettinger









From pitonero at gmail.com  Fri Apr 22 23:45:55 2005
From: pitonero at gmail.com (El Pitonero)
Date: 22 Apr 2005 20:45:55 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>
	<4269a0ea.275861307@news.oz.net>
Message-ID: <1114227955.605994.162700@g14g2000cwa.googlegroups.com>

Bengt Richter wrote:
> I still don't know what you are asking for, but here is a toy,
> ...
> But why not spend some time with the tutorials, so have a few more
cards in your deck
> before you try to play for real? ;-)

Communication problem.

All he wanted is automatic evaluation a la spreadsheet application.
Just like in Microsoft Excel. That's all.

There are many ways for implementing the requested feature. Here are
two:

(1) Push model: use event listeners. Register dependent quantities as
event listeners of independent quantities. When an independent quantity
is modified, fire off the event and update the dependent quantities.
Excel uses the push model.

(2) Pull model: lazy evaluation. Have some flag on whether an
independent quantity has been changed. When evaluating a dependent
quantity, survey its independent quantities recursively, and update the
cached copies whereever necessary.

Of course, combination of the two approaches is possible.

For Python, metaclasses and/or decorators and/or properties may help.

But functional languages are a more natural territory.



From mage at mage.hu  Mon Apr 11 18:14:03 2005
From: mage at mage.hu (Mage)
Date: Tue, 12 Apr 2005 00:14:03 +0200
Subject: semicolons
Message-ID: <425AF6AB.900@mage.hu>

       Hello,

I amafraid of I will stop using semicolons in other languages after one
or two months of python. However I see that python simply ignores the
semicolons atd the end of the lines.

What's your advice? I don't want to write full-of-typo php scripts but I
see the logic of the python syntax too.

       Mage




From jussij at zeusedit.com  Thu Apr  7 06:57:45 2005
From: jussij at zeusedit.com (Jussi Jumppanen)
Date: Thu, 07 Apr 2005 20:57:45 +1000
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<1112827243.578968.237010@z14g2000cwz.googlegroups.com>
Message-ID: <42551229.7B75@zeusedit.com>

Joey C. wrote:

> When I'm using Windows, I have found the Syn TextEditor

The Zeus for Windows programmer's supports Python:

   http://www.zeusedit.com/lookmain.html

Some of the programming specific features include:

  + Code folding (supports python)
  + Integrated class browser
  + Project/workspace management
  + Fully configurable syntax highlighting
  + FTP editing
  + Integrated version control (including CVS)
  + Fully scriptable using Python, Lua, JavaScript, VbScript

But Zeus is shareware and cost $35-00 to register. It is free 
to test drive the editor as the shareware version runs fully 
functional for 60 days.

Jussi Jumppanen
Author of: Zeus for Windows (New version 3.94 out now)


From merkosh at hadiko.de  Tue Apr 12 12:58:32 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 18:58:32 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
	<d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>
	<d3gtlh$2ll$1@news2.rz.uni-karlsruhe.de>
	<1113324679.749845.300040@l41g2000cwc.googlegroups.com>
Message-ID: <d3gunp$384$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 18:51 pm Michele Simionato wrote:

> Uhm? If I pass different parameters I want to have
> different instances. The Singleton behaviour is recovered
> only when I pass always the same arguments, in
> particular when I pass 0-arguments:
> 
>>>> class Foobar:
> ...     __metaclass__ = Memoize
> ...
>>>> Foobar()
> <__main__.Foobar object at 0xb7defbcc>
>>>> Foobar()
> <__main__.Foobar object at 0xb7defbcc>
>>>> Foobar()
> <__main__.Foobar object at 0xb7defbcc>
> 
> Of course if for Singleton you mean "whatever I pass
> to the constructor it must always return the same
> instance" then this pattern is not a Singleton.
> This is why I call it memoize ;)

:)

I guess it depends on what you want to do with the instance and the
constructor, wether it satisfies the condition to be a "singleton":

If you pass i.e. the timestamp of object creation in the constructor, or the
class name that instanciates the object, a memoized implementation would
not suffice.

On the other hand if you need parameterized implementations of a singleton,
i.e. for each colour 'red', 'green', 'blue' - then a memoized
implementation would be better.

Uwe


From xah at xahlee.org  Sun Apr 17 11:07:53 2005
From: xah at xahlee.org (Xah Lee)
Date: 17 Apr 2005 08:07:53 -0700
Subject: re module methods: flags(), pattern()
Message-ID: <1113750473.663610.172200@z14g2000cwz.googlegroups.com>

Python re module has methods flags and pattern. How to use these
exactly?

e.g. i tried

print patternObj.flags()

and the error is some "int object is not callable".

newpattern=re.compile(ur'\w+',patternObj.flags())

also bad.

similar error for patternObj.pattern(). (and i suppose the same for
groupindex() )

thanks.

 Xah
 xah at xahlee.org
? http://xahlee.org/



From MrJean1 at gmail.com  Thu Apr 14 19:35:51 2005
From: MrJean1 at gmail.com (MrJean1)
Date: 14 Apr 2005 16:35:51 -0700
Subject: Text & Unicode processing references on the web.
In-Reply-To: <mailman.1594.1113009034.1799.python-list@python.org>
References: <mailman.1594.1113009034.1799.python-list@python.org>
Message-ID: <1113521751.227441.217430@f14g2000cwb.googlegroups.com>

Check David Mertz' book and web site

 <http://gnosis.cx/TPiP/>

to start. There is more in some of the list here

 <http://gnosis.cx/publish/tech_index_cp.html>.


/Jean Brouwers


anthony hornby wrote:
> Hi,
> I am starting my honours degree project and part of it is going to be
> manipulating ASCII encoded XML files from a legacy database and
> converting them to Unicode and doing text processing stuff on the
data.
>
> I am new to python ( total n00b ) but am keen to use it as the rest
of
> the software my application has to extend is already written in
python,
> plus I've always wanted to learn more about it - so here's my chance
:-)
>
> I've written stuff in Java and Perl so I expect I'll pick up the
basics
> without too much trouble.
>
> Can anyone point out some good "Python & Unicode" and "Python & Text
> processing" resources on the net to get me started? Any good book
> recommend
ations?
>
> Thanks a lot for your help.

> -
> Mr Anthony Hornby RHCE BIT ALIATEC
> Library Systems & Technology Coordinator
> Charles Darwin University | CRICOS 300K
> anthony.hornby at cdu.edu.au | office +61 8 89 466011



From olsongt at verizon.net  Wed Apr 20 12:12:59 2005
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 20 Apr 2005 09:12:59 -0700
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <mailman.2157.1113985649.1799.python-list@python.org>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
	<16996.30734.778261.632448@montanaro.dyndns.org>
	<mailman.2157.1113985649.1799.python-list@python.org>
Message-ID: <1114013579.678371.39120@z14g2000cwz.googlegroups.com>


Simon Brunning wrote:
>
> Yup, but it's not all unchanging. Take, for example,
> <http://www.python.org/doc/current/tut/node16.html>. I have wanted to
> steer people towards that page a number of times, and that node
number
> keeps changing.
>

Here's the code I've been using to translate the latex2html links
(including embedded anchors) to something that has some context.  I can
lookup links via something that is understandable like
('os','path','exists').  A truly adventurous person could probably use
this to write a redirector.

http://pyxr.sourceforge.net/PyXR/c/python24/lib/site-packages/pyxr/htmlCrawler.py.html



From davecook at nowhere.net  Sun Apr 10 10:19:07 2005
From: davecook at nowhere.net (Dave Cook)
Date: Sun, 10 Apr 2005 14:19:07 GMT
Subject: Distributing Python Apps and MySQL
References: <1112887332.324949.318960@z14g2000cwz.googlegroups.com>
Message-ID: <slrnd5ider.2nh.davecook@localhost.localdomain>

On 2005-04-07, dcrespo <dcrespo at gmail.com> wrote:

> Hi there... I want to distribute my python apps and the MySQL Database
> in the easiest way possible. I mean a user just run the installation
> file and all is automaticly installed. Any suggestions?

sqlite is even easier: a single DLL for the engine, a single file for the
data, and the license couldn't be more liberal.

http://www.sqlite.org

Dave Cook


From R.Brodie at rl.ac.uk  Tue Apr  5 08:32:12 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 5 Apr 2005 13:32:12 +0100
Subject: playing with pyGoogle - strange codec error
References: <2005040410062316807%brian@brianandkatecom>
Message-ID: <d2u0gc$piv$1@blackmamba.itd.rl.ac.uk>


"Brian Blazer" <brian at brianandkate.com> wrote in message
news:2005040410062316807%brian at brianandkatecom...

> Everything works fine until I get to r.snippet.  Here is the error:
>
> UnicodeEncodeError: 'ascii' codec can't encode character '\ua9' in
> position 119: ordinal not in range(128)

You have a character there (the copyright sign) that isn't in the ASCII
set. If you have anything other than plain ASCII, you need to consider
encoding. This reference might help:

http://diveintopython.org/xml_processing/unicode.html




From tjreedy at udel.edu  Fri Apr  1 14:37:00 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 14:37:00 -0500
Subject: numeric module
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
Message-ID: <d2k7q7$9cp$1@sea.gmane.org>


<shama.bell at gmail.com> wrote in message 
news:1112377090.192124.303640 at o13g2000cwo.googlegroups.com...
> What's the problem with this code? I get the following error message:

2.4 or earlier?

> File "test.py", line 26, in test
>    print tbl[wi][bi]
> IndexError: index must be either an int or a sequence

Longs are not ints; message implies that Numeric, unlike Python, does not 
allow them as indexes.

> from Numeric import *
> tbl = zeros((32, 16))
>
> def test():
>
>    val = testme()

val is never used

>    wi = crc >> 4

crc is never set, so how did this run?

>    bi = crc & 0xFL

making bi a long.  Try 0xF which should be faster anyway.

>    print wi
>    print bi
print type(wi), type(bi)
>    print tbl[wi][bi]
>
> def testme():
>    val = 0xFFFFFFL
>    val >>= 23
>    return val
>
> if __name__ == '__main__':
>    test()





From dthierbach at usenet.arcornews.de  Sun Apr 10 11:00:08 2005
From: dthierbach at usenet.arcornews.de (Dirk Thierbach)
Date: Sun, 10 Apr 2005 17:00:08 +0200
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<20050409082128.A3E.0.NOFFLE@dthierbach.news.arcor.de>
	<20050409142843.26D9.0.NOFFLE@dthierbach.news.arcor.de>
	<1113070926.355501.147880@f14g2000cwb.googlegroups.com>
Message-ID: <20050410150008.ACB.1.NOFFLE@dthierbach.news.arcor.de>

George Sakkis <gsakkis at rutgers.edu> wrote:
>>    A1 - A2 - A3 - A4 - ...
>>    |    |    |    |
>>    B1 - B2 - +  - B4 - ...
>>    |    |    |    |
>>    C1 - +  - C3 - +  - ...
>>    |    |    |    |
>>    D1 - D2 - +  - D4 - ...
>>    |    |    |    |

>> The solution is simply to include C3 in the list of parents of D4,
>> as in D4(C3,B4,D2). So for every hole in a column, you have to
>> include the first class (or classes, if the hole spans multiple
>> rows) to the left of the hole as parents if the class just below
>> the hole, in order from bottom to top. 

> Nice. I had taken for granted that you need to fill in the holes
> (D3,B3,C2), either manually or automa[tg]ically, but if you allow a
> class to inherit from more than two bases, you can pick a set of
> parents that does the job, without any boilerplate code or
> __metaclass__ magic. The downside of this approach is that it's even
> harder to see the big picture, as in the schematic notation above;
> remember that each column is a different version that resides in a
> separate module, so it's not obvious which classes should be the
> parents of each variation. 

It's obvious if you know which versions are available, and which
aren't. If you don't have this information, and you're only looking at
each module locally, than it's probably even safer (i.e., less likely
to confuse a casual reader of the source) to just generate all the
dummy classes manually. But that sort of makes your original problem 
irrelevant :-)

- Dirk


From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 24 10:40:18 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 24 Apr 2005 16:40:18 +0200
Subject: Question on metaclasses
In-Reply-To: <1114353460.225361.238720@g14g2000cwa.googlegroups.com>
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
	<1114353460.225361.238720@g14g2000cwa.googlegroups.com>
Message-ID: <3d1piaF6q2idjU1@individual.net>

Steffen Gl?ckselig wrote:
> Are wrap and get_directives somehow built-in? I couldn't find
> references to them.
> 
> I've noticed, too, that using __new__ I can manipulate the dictionary
> resulting in the behavior I intented.
> 
> I'd rather like to know: Why does it work in __new__ but not in
> __init__?
> 
> And, stimulated by your response: Why is using __new__ superior to
> __init__?

At short, __new__ is called on the class and must return the instance; that
means that the instance isn't created yet.

__init__, on the other hand, is called on the instance which is already created
at that point. So changing dct in __init__ is pointless, because the instance
(which is a class actually) is already created.

Reinhold


From snail at objmedia.demon.co.uk  Thu Apr 14 07:05:39 2005
From: snail at objmedia.demon.co.uk (Stephen Kellett)
Date: Thu, 14 Apr 2005 12:05:39 +0100
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<425e47a9$0$26352$db0fefd9@news.zen.co.uk>
Message-ID: <4IdnkRCD6kXCFwNl@objmedia.demon.co.uk>

In message <425e47a9$0$26352$db0fefd9 at news.zen.co.uk>, Will McGugan 
<news at NOwillmcguganSPAM.com> writes
>Please implement this as a Python module. I would like to compress my 
>mp3 collection to single bits.

Just think you could have better than broadband download speeds, on your 
old 300bps modem!
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html


From elbertlev at gmail.com  Sun Apr  3 17:10:41 2005
From: elbertlev at gmail.com (elbertlev at gmail.com)
Date: 3 Apr 2005 14:10:41 -0700
Subject: threading.Event file descriptor
In-Reply-To: <zxM3e.55834$rl.2020212@weber.videotron.net>
References: <zxM3e.55834$rl.2020212@weber.videotron.net>
Message-ID: <1112562641.542176.202030@z14g2000cwz.googlegroups.com>


Nicolas Fleury wrote:
> Hi,
> Is there any way to get the file descriptor on Unix or handle on
Windows
> associated internally with a threading.Event object?  So that it can
be
> used in a call to select or WaitForMultipleObjects.
> Thx and regards,
> Nicolas

Good idea! But...

There is no event handle used in Event object (for NT at least). Do not
know about Linux...

Unless you want to rewrite the interpreter (namelly
PyThread_allocate_lock.c) for platforms you are talking about, you
would be better of, if you create your own class (derived from Event,
and ovewritte aquire, release and wait methods).



From EckhoffM at NAVO.NAVY.MIL  Fri Apr 29 16:55:15 2005
From: EckhoffM at NAVO.NAVY.MIL (Eckhoff, Michael A)
Date: Fri, 29 Apr 2005 15:55:15 -0500
Subject: interactive web graphics
Message-ID: <23E4371F6124D411B59B00805F9FA97115D68286@navont3.navo.navy.mil>


On 2005-04-29 Diez Roggisch wrote:
> Take qt if you can - the upcoming version qt4 will be GPLed for windows
> (which means better binary support for windows), but recently the qt3 x11
> free edition got adapted to windows. I use that myself, and have to say
> that I'm pretty impressed - apart from some real minor glitches (e.g. the
> date entry widget shows some highlighting problems) things work smooth.
And
> qt is a fantastic toolkit. And very well worth the money you have to buy
it
> - the time and effort saved using a well-designed orthogonal toolkit will
> make the cost amortise pretty quick. Especially when used in conjunction
> with PyQt.

I'm surprised that Trolltech is allowing Microsoft to get their product
for free. I have played with Qt3 somewhat; not sure how their widgetry
compares with GTK+, as far as looks are concerned, but much prefer C++.
Disappointingly, the openGL module for QT failed to work when I ran the 
examples.  I hear VTK is nice. Just checked Google and, sure enough,
there's a pyVTK. 


On 2005-04-28 Lee Harr wrote:
> How about the blender web plugin?
> http://www.blender.org/modules/bc2002/plugin.html
> 
> I am not sure the plugin has been updated to match
> recent blender releases, but recent blenders offer
> python scripting. Could be interesting anyhow.

Blender looks impressive too, but do I have to learn
how to program with mozilla? I feel like a bee who cannot
decide on which flower to light. Anyway, thanks to you all
for the input.

Mike E


From antonxx at gmx.de  Tue Apr 26 07:00:17 2005
From: antonxx at gmx.de (stephan)
Date: 26 Apr 2005 04:00:17 -0700
Subject: Interrupting execution of PyRun_SimpleScript()
Message-ID: <35b78d97.0504260300.7b5d0458@posting.google.com>

Hi,

Im am using PyRun_SimpleString() inside a BCB 5.0 GUI app
on win32.

All works fine.

The PyRun_SimpleStript() runs a piece of python
code which calls often a callback function to
refresh my gui App so my Form still can react
to user input.

Now, I would like to implement a possibility
to interrupt the execution.

For this I have a button called "stop", and when
the user executes it, I generate an exeption by
calling:
PyRun_SimpleString("raise KeyboardInterrupt\n").

I see in the window where I redirected stderr and stdout
the exception, but the original code (a for loop)
still continues to run.

Does there somebody have some idea (in the Python FAQ
i didnT find anything)

Thanks

 Anton


From fredrik at pythonware.com  Mon Apr 11 11:42:18 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 17:42:18 +0200
Subject: My stupid newbie mistake
References: <k00l51dagrs1b1cq8pam1ac8vht2v6t3rp@4ax.com>
	<Ka2dnRhGzbydEsffRVn-oQ@comcast.com>
Message-ID: <d3e5n2$tj6$1@sea.gmane.org>

Larry Bates wrote:

> Because Python allows you to replace built-in methods with
> your own.  Later you will find that this can be extremely
> powerful.  You will stumble on this if you name a list 'list'
> a string 'str', integer 'int', float 'float', dictionary
> 'dict', ... (at least I did <grin>).

try is a reserved word.

list, str, int, float, dict are not reserved words.  you can accidentally
shadow built-in objects by using one of them for your own purposes
(this may or may not matter), but it's not a syntax error.

</F>





From fredrik at pythonware.com  Sat Apr 23 05:06:52 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 23 Apr 2005 11:06:52 +0200
Subject: tracing function calls
References: <1114245537.919546.254320@f14g2000cwb.googlegroups.com>
Message-ID: <d4d2uj$js9$1@sea.gmane.org>

"Stormbringer" wrote:

> I've been wondering if there is a mechanism similar to trace/untrace
> found in lisp, for example call trace(function-name) and whenever this
> function is called it will show its parameters to stdout ....

def trace(func):
    def tracer(*args, **kwargs):
        print func.__name__, args, kwargs
        result = func(*args, **kwargs)
        print func.__name__, "return", result
        return result
    return tracer

def myfunc(a, b, c):
    return a + b + c

myfunc = trace(myfunc)

myfunc(1, 2, 3)

(tweak as necessary)

</F>



From ajikoe at gmail.com  Mon Apr  4 13:04:46 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Apr 2005 10:04:46 -0700
Subject: setup distributed computing for two computer only
Message-ID: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>

Hello,

Is there any one who has experiance about how to setup distributed
computing for 2 computer only. I really want to know from the start.
Any suggestion appreciated.

Sincerely Yours,
Pujo



From gandalf at geochemsource.com  Fri Apr 22 14:54:16 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Fri, 22 Apr 2005 20:54:16 +0200
Subject: Python licence again
Message-ID: <42694858.1060702@geochemsource.com>


  Hi All!

I know there has been a post about Python licencing but I have different 
questions. I tried to Google for "Python Licence" and "Python Licencing" 
but I could not find the answer.
Is there a place where I can ready about Python licencing? (A FAQ 
maybe?) I really need to know the details of the licence, but not in the 
lawyer's language. Just simple questions:

- How put a software under the Python licence?
- What can I do with the software?
- What can't I do?

I only need to know the most common things (like who can copy, 
distribute, who can ask for money etc.)

I would like to make a bigger application. I would like to make it Open 
source. GPL is not so good because I would like to encourage commercial 
users too. I believe the best is to use the same licence for my application.

Thank you,

   Laci 2.0


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From writeson at charter.net  Fri Apr  1 14:58:11 2005
From: writeson at charter.net (writeson)
Date: 1 Apr 2005 11:58:11 -0800
Subject: pagecrawling websites with Python
Message-ID: <1112385491.601719.67420@o13g2000cwo.googlegroups.com>

Hi all,

We've got an application we wrote in Python called pagecrawler that
generates a list of URL's based on sql queries. It then runs through
this list of URL's 'browsing' one of our staging servers for all those
URL's. We do this to build the site dynamically, but each page
generated by the URL is saved as a static HTML file. Anyway, the
pagecrawler program uses Python threads to try and build the pages as
fast as it can. The list of URL's is stored in a queue and the thread
objects get URL's from the queue and run them till the queue is empty.
This works okay but it still seems to take a long time to build the
site this way, even though the actual pages only take milliseconds to
run (the pages are generated with PHP on separate server). Does anyone
have any insight if this is a reasonable approach to build web pages,
or if we should look at another design?

Thanks in advance,
Doug



From grante at visi.com  Sat Apr 23 19:00:15 2005
From: grante at visi.com (Grant Edwards)
Date: Sat, 23 Apr 2005 23:00:15 -0000
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<86k6musact.fsf@guru.mired.org>
	<od1l61pdetidh0ilequraj24fk2l3nu0l8@4ax.com>
	<867jitrupx.fsf@guru.mired.org>
Message-ID: <116lkrvm5ku3p39@corp.supernews.com>

On 2005-04-23, Mike Meyer <mwm at mired.org> wrote:

>>> No, you don't. My print system does that, and I don't have
>>> acrobat installed. I have ghostscript installed, which
>>> includes pdf2ps - which handles this particular translation.
>>>
>> 	Okay, so you've converted one page layout language
>> (PDF) to another (PS)... To actually print it you still need a
>> RIP. A PostScript laser printer has the RIP built-in, but
>> consumer level Windows printers do not have a PostScript RIP
>> -- and some printers don't even have their own specific RIP
>> built-in ("winprinters" put the RIP into the software driver
>> that runs on the Windows machine, rather than sending drawing
>> commands to the printer for rendering).
>
> RIP? That term is to generic for google to be much use.

Raster Image Processor.  It renders postscript into a raster
image at the proper image.

-- 
Grant Edwards                   grante             Yow!  If this is the DATING
                                  at               GAME I want to know your
                               visi.com            FAVORITE PLANET! Do I get
                                                   th' MICROWAVE MOPED?


From nyamatongwe+gravity at gmail.com  Fri Apr 15 20:32:23 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Sat, 16 Apr 2005 00:32:23 GMT
Subject: Using python from a browser/security hole
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
	<MPG.1cca20626fa9aeca98968a@news-server>
	<TkP7e.2472$VA3.2138@newssvr30.news.prodigy.com>
Message-ID: <MPG.1ccb006aa0b692f298968b@news-server>

Philippe:

> Would Jpython let me do that ?
> Would java let me call an external Python script - which in turn would
> access my device ?

   Not without asking for more permissions than accessing the device as 
being able to execute arbitrary code is very dangerous. Think of this 
from the point of view of someone trying to stop malicious code from 
executing because of visiting a web page. There are various ways to 
install code that can be called from web pages such as installing COM 
objects or writing browser extensions but you will have to get the user 
to allow these and they may not have permission to do so. Often they 
won't know how to allow this so you will have to write up detailed 
instructions after exploring the area thoroughly yourself.

   Neil


From greg at cosc.canterbury.ac.nz  Fri Apr  8 01:47:38 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 08 Apr 2005 17:47:38 +1200
Subject: within a class, redefining self with pickled file
In-Reply-To: <mailman.1511.1112913622.1799.python-list@python.org>
References: <1112912826.542938.48500@o13g2000cwo.googlegroups.com>
	<mailman.1511.1112913622.1799.python-list@python.org>
Message-ID: <3bmk88F657s85U1@individual.net>

Sean Blakey wrote:
> On 7 Apr 2005 15:27:06 -0700, syd <syd.diamond at gmail.com> wrote:
> 
>> def unpickle(self):
>>   self = pickle.load(open(self.getFilePath('pickle')))

> Note, however, that you can MODIFY self in-place within a method. You
> can probably hack together a solution that modifies self.__dict__,
> self.__class__, self.__class__.__dict__, or some other magic
> properties.

such as

   def unpickle(self):
     new_self = pickle.load(open(self.getFilePath('pickle')))
     self.__class__ = new_self.__class__
     self.__dict__.update(new_self.__dict__)

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From m at m.com  Fri Apr 29 03:44:14 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 15:44:14 +0800
Subject: why "import wx" doesn't work?
References: <427126ca$1_3@rain.i-cable.com>
	<AIGdndAYHJms3ezfRVn-ig@powergate.ca>
	<4271560d$1_2@rain.i-cable.com>
	<b1dce.988$nM3.173@newssvr31.news.prodigy.com>
Message-ID: <4271e5cc$1_1@rain.i-cable.com>

They both work, thanks for your instruction ( :

> I suspect you are mixing program code for the namespace version (import
> wx) with the old method of importing (from wxPython.wx import *).
>
> Here are two version of a very simple app... try both and see if you get
> any errors. And if so, _please_ post the exact error you get.
>
> --- BEGIN The "new" namespace version ----
>
> import wx
>
> class MainFrame(wx.Frame):
>      def __init__(self, parent, id=-1, title="Test Wx", size=(-1, -1),
> pos=(-1,-1), style=wx.DEFAULT_FRAME_STYLE|wx.NO_FULL_REPAINT_ON_RESIZE):
>          wx.Frame.__init__(self, parent, id, title, size, pos, style)
>          self.Show(True)
>
> app = wx.PySimpleApp()
> frame = MainFrame(None, -1, "Test Wx NameSpace Style")
> app.MainLoop()
>
> --- END The "new" namespace version ----
>
> --- BEGIN The old style import ----
>
> from wxPython.wx import *
>
> class MainFrame(wxFrame):
>      def __init__(self, parent, id=-1, title="Test Wx", size=(-1, -1),
> pos=(-1,-1), style=wxDEFAULT_FRAME_STYLE|wxNO_FULL_REPAINT_ON_RESIZE):
>          wxFrame.__init__(self, parent, id, title, size, pos, style)
>          self.Show(True)
>
> app = wxPySimpleApp()
> frame = MainFrame(None, -1, "Test Wx Old Style")
> app.MainLoop()
>
> --- END The old style import ----
>
> Hope that helped!
>
> Thanks,
> -Kartic
>




From mauriceling at acm.org  Tue Apr 26 21:32:13 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 11:32:13 +1000
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
Message-ID: <d4mq31$gq3$1@domitilla.aioe.org>

monkey wrote:
> Hi all, I am new to programming, already have a glace on introduction of
> c++, java and finally decided on python. But I found that the .py file is
> just like the source file, how can I make a program without revealing its
> source? (may be my question is a little bit stupid)
> 
> 

It is generally not very easy or straight-forward. The developers of 
CPython had generally intended that the source codes be the actual 
distribution, and is not likely to change. (see the thread on "bytecode 
non-backcompatibility")

For now, you can use pyfreeze to snap the application, which is to 
bundle your application to a python interpreter (bootstrapping) as a 
package but this will not create a portable application. You can only 
run the application on the native system that it is frozen on. For 
example, if i freeze my application on Mac OSX, I won't be able to run 
that on MS Windows. Freezing bootstraps the system's python onto the 
application.

If your application does not use any C modules, you can try to use 
Jython instead. Program in python but use jythonc to convert it into 
Java source files and package it into Java JAR files, then you will only 
need to release the JAR files without needing to release your codes.

Cheers
Maurice


From ville at spammers.com  Thu Apr 28 02:32:11 2005
From: ville at spammers.com (Ville Vainio)
Date: 28 Apr 2005 09:32:11 +0300
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
Message-ID: <du764y74djo.fsf@amadeus.cc.tut.fi>

>>>>> "pydev" == Brian Beck <exogen at gmail.com> writes:

    pydev> * PyDev isn't yet mature enough to make it practical for me

What version? PyDev has increased in maturity quite a bit lately.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From jjl at pobox.com  Mon Apr  4 17:57:56 2005
From: jjl at pobox.com (John J. Lee)
Date: 04 Apr 2005 21:57:56 +0000
Subject: A ClientForm Question
References: <1112351784.512279.198080@z14g2000cwz.googlegroups.com>
	<pan.2005.04.03.12.41.05.4355@f0x.it>
Message-ID: <87d5ta6w7v.fsf@pobox.com>

Francesco <francesco at f0x.it> writes:

> Il Fri, 01 Apr 2005 02:36:24 -0800, narke ha scritto:
> 
> > Does anyone here use ClientForm to handle a HTML form on client side?

Yes. :-)

[...]
> >     forms = ParseResponse(urlopen(url))
> > 
> >     form = forms[0]
> >     urlopen(form.click("ZoomControl1:Imagebutton2"))
> > 
> > unfortunatly, however, when the code run, it just got a page which is
> > not the one i desired ( i actually wish to get the same page as i
> > 'click' the button).  I guess that is "onclick=" statement cause
> > something weird, but I do not understand it.  And, in the source
> > containing the form, i found nowhere the Page_ClientValidate() resides.

Learn JS ;-/  Could be lots of things, read these:

http://wwwsearch.sourceforge.net/ClientForm/index.html#faq

http://wwwsearch.sourceforge.net/ClientCookie/doc.html#debugging


> Similar problem for me.
> In the form, i have
> <input type="button" value="entra" class="button"
> onClick="document.UserForm.submit()">
> and i don't know how to click this.
> urlopen(form.click()) doesn't nothing.
> UserForm is the name of the form.

http://wwwsearch.sourceforge.net/ClientForm/index.html#faq


See second bullet point under "Why does .click()ing on a button not
work for me?".


John


From mefjr75 at hotmail.com  Wed Apr 20 01:24:15 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 19 Apr 2005 22:24:15 -0700
Subject: newbie question
In-Reply-To: <465db603.0504191314.5d074cf8@posting.google.com>
References: <465db603.0504191314.5d074cf8@posting.google.com>
Message-ID: <1113974655.887903.275910@z14g2000cwz.googlegroups.com>

You might want to look at PyGame.
http://pygame.org/

Newbies can go far using PyGame but the maths can be a bit complex no
matter what language or package you use.
For an alternative try Blender 3d.
http://blender.org
Blender is a 3d suite that can do it all and then some , it's free ,and
it uses Python for it's  scripting. You can create a game and never
touch a piece of code if you use the builtin actuators and sensors, or
you can script with Python.
hth,
M.E.Farmer



From kanedatakeshi at gmx.de  Fri Apr  1 14:41:36 2005
From: kanedatakeshi at gmx.de (kanedatakeshi at gmx.de)
Date: 1 Apr 2005 11:41:36 -0800
Subject: Creating Modules/Namespaces from C/C++ for better class/function
	encapsulation/cleanup
Message-ID: <1112384496.219927.176310@z14g2000cwz.googlegroups.com>

Hi folks!

The problem is the following:

I use Python 2.1 embedded in a C++ game engine. Some of the engines
complexer objects (AI, game logic, etc.) use python classes that act as
an extension of those "parent" C++-classes.

The python classes are currently loaded on demand by their "parent"
C++-instances, say if an enemy gets activated and starts running. I do
that by:
1.) reading the needed python script (dedicated to that enemy class)
into a string and then
2) calling 'Py_CompileString()' followed by
3) 'PyEval_EvalCode()'

Then I have access to all class(es) defined in the python script
implementing all the needed methods for my enemy.
It looks a bit tedious than just calling e.g. 'PyRun_SimpleFile()', but
I thought, that PyEval_EvalCode() could provide me with means to force
a local and global namespace on the interpreted code.

Problem and Question:
To get rid of ALL code/class definitions/etc. defined when I loaded and
interpreted the enemy's python script, I want the python interpreter to
force a namespace or module context on everything associated with my
enemy, so I can be sure I cleaned up everything that is related to the
previous loading operation. I tried to use a new module (e.g. calling
'PyImport_AddModule') as my local namespace, but the script couldn't
find any built-in functions or even other classes defined in the very
same script file anymore when I did that.

Any idea how to do that properly?

Cheers!

PiLLe



From bokr at oz.net  Wed Apr 27 02:01:29 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 27 Apr 2005 06:01:29 GMT
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
	<1114549103.844774.178070@o13g2000cwo.googlegroups.com>
Message-ID: <426f2a0f.17534463@news.oz.net>

On 26 Apr 2005 13:58:23 -0700, "Lonnie Princehouse" <finite.automaton at gmail.com> wrote:

>A quick, hackish way to keep a static variable is to declare it as a
>parameter and give it a default value.  The parameter list is evaluated
>when the function is compiled, not when it is called.   The underscores
>are added as per convention to indicate that the variable is
>special/private.
>
>Example-
>
>def cumulative_sum(arg, __static__ = []):
>    __static__.append(arg)
>    return reduce(lambda a,b: a + b, __static__)
>
>#-------------------
>
>>>> cumulative_sum(1)
>1
>>>> cumulative_sum(1)
>2
>>>> cumulative_sum(1)
>3
>
This default-value hack is what my presets decorator was motivated to replace
(if you are willing to depend to a byte-code-hacking decorator ;-)

Regards,
Bengt Richter


From NODARNSPAMdboland9 at stny.rr.com  Thu Apr  7 14:17:27 2005
From: NODARNSPAMdboland9 at stny.rr.com (Dave Boland)
Date: Thu, 07 Apr 2005 18:17:27 GMT
Subject: Manipulating Peach Tree (accounting) Btrieve database
Message-ID: <XOe5e.62465$Ms3.962@twister.nyroc.rr.com>

Has anyone used Python (or other language) to query and 
report on data in the accounting program Peach Tree?  Peach 
Tree uses a Btrieve database, but I can't be certain the 
database conforms to all of the Btrieve standards.  Some 
companies take liberties with things like that ;-).

When all is done, I need to do some good looking cross-tab 
reports and maybe make the info available by web page.

Thanks,
Dave



From gigi-s at bigfoot.com  Sun Apr 17 18:40:58 2005
From: gigi-s at bigfoot.com (Gigi)
Date: Sun, 17 Apr 2005 15:40:58 -0700
Subject: How to get a Function object from a Frame object
Message-ID: <d3uoea$s5p$1@sea.gmane.org>

Hi,
I need access to a function object that corresponds to a frame object in 
a certain case from inside the function.

I can get the frame object using:

f = sys._getframe(0)

But the resulting frame object doesn't contain the information I need. 
There is a lot of information in the code object (f.f_code), but not the 
     actual function or method object.

The inspect module doesn't help either it just provides nicer interface 
to the Frame object.

Any ideas out there?

Thanks, Gigi



From dimitri.pater at gmail.com  Tue Apr 12 18:23:11 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Wed, 13 Apr 2005 00:23:11 +0200
Subject: nested tuple slice
In-Reply-To: <54668D97C0199943A454516A5FF6481E58A993@EXCHUS001.AD.MLP.COM>
References: <54668D97C0199943A454516A5FF6481E58A993@EXCHUS001.AD.MLP.COM>
Message-ID: <e75321bd050412152340cf764c@mail.gmail.com>

Thanks,
I have been trying this:

tuple = (('goat', 90, 100), ('cat', 80, 80), ('platypus', 60, 800))

index = 0
newtuple = ()
for item in tuple:
newtuple = newtuple + tuple[index][0:2]
index += 1

print newtuple

but it returns:
('goat', 90, 'cat', 80, 'platypus', 60)
which is no longer nested, and I need a nested tuple

Dimitri
On Apr 12, 2005 11:53 PM, Leeds, Mark <mleeds at mlp.com> wrote:
> 
>  maybe list(tuple)[0:2])) will
> 
> get you what you
> 
> want but I don't know how to
> 
> change it back to a tuple.
> 
> I'm just starting out but
> 
> I would be interested also.
> 
>  mark
> 
>  -----Original Message-----
> *From:* python-list-bounces+mleeds=mlp.com at python.org [mailto:
> python-list-bounces+mleeds=mlp.com at python.org] *On Behalf Of *dimitri 
> pater
> *Sent:* Tuesday, April 12, 2005 5:49 PM
> *To:* python-list at python.org
> *Subject:* nested tuple slice
> 
>  hello!
> 
> I want to change a nested tuple like:
> tuple = (('goat', 90, 100), ('cat', 80, 80), ('platypus', 60, 800))
> into:
> tuple = (('goat', 90), ('cat', 80), ('platypus', 60))
> 
> in other words, slice the first elements of every index
> 
> Any ideas on how to do this in an elegant, pythonic way?
> 
> Best regards,
> Dimitri
> 
> 
>  


-- 
Please visit dimitri's website: www.serpia.com <http://www.serpia.com>
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From spam4bsimons at yahoo.ca  Sun Apr  3 19:35:47 2005
From: spam4bsimons at yahoo.ca (Brendan)
Date: 3 Apr 2005 16:35:47 -0700
Subject: Help me dig my way out of nested scoping
In-Reply-To: <mailman.1274.1112569810.1799.python-list@python.org>
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
	<mailman.1274.1112569810.1799.python-list@python.org>
Message-ID: <1112571347.299876.275890@f14g2000cwb.googlegroups.com>

F -is- in fact an iterative optimizer that minimizes A on x (B is the
derivative of A).  So yes, F will call A and B on mulitple 'x's.   In
that case, it seems the mutable object trick is the way to go.  Thanks.

I didn't follow your last sentence.  What about the Python Cookbook?



From llucier at shaw.ca  Thu Apr 28 16:55:35 2005
From: llucier at shaw.ca (Lawrence Lucier)
Date: Thu, 28 Apr 2005 20:55:35 GMT
Subject: Ron Grossi: God is not a man
In-Reply-To: <#jF1aVBTFHA.3176@TK2MSFTNGP09.phx.gbl>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<#jF1aVBTFHA.3176@TK2MSFTNGP09.phx.gbl>
Message-ID: <b5cce.1148364$Xk.950496@pd7tw3no>

Donald L McDaniel wrote:
> 3) Since Lucifer is an angel, he does not engage in sexual relations. 
> (Christ tells us that angels don't engage in sexual relations by His Own 
> Words.)

Maybe you should take time to stop posting this inane drivel and do some 
studying pertaining to the "Nephilim".....or have you just conveniently 
decided to ignore the writtings of Genesis?


From Daniel.Cer at gmail.com  Mon Apr 18 02:28:13 2005
From: Daniel.Cer at gmail.com (Daniel Cer)
Date: Mon, 18 Apr 2005 00:28:13 -0600
Subject: Canceling/interrupting raw_input
In-Reply-To: <2LG8e.12216$hu5.4874@tornado.texas.rr.com>
References: <2LG8e.12216$hu5.4874@tornado.texas.rr.com>
Message-ID: <4263537D.9020606@gmail.com>

For what it's worth, this looks like a Windows specific problem.

The code below seems to work as expected on a Linux box. That is, 
everything terminates, including the "inputLoop", after sys.exit() is 
called, without the user needing to press 'enter' one last time.

However, if I try to run the code on Windows XP, it exhibits the exact 
same behavior you described.

#!/usr/bin/python

import thread
import time
import sys

def inputLoop():
      while 1:
              input_string = raw_input("Type something: ")
              print "You entered: ", input_string

thread.start_new_thread(inputLoop, () )

time.sleep(15)

sys.exit()

-Dan


J. W. McCall wrote:
> I'm working on a MUD server and I have a thread that gets keyboard input 
> so that you can enter commands from the command line while it's in its 
> main server loop.  Everything works fine except that if a player enters 
> the 'shutdown' command, everything shuts down, but the input thread is 
> still sitting waiting for enter to be pressed for raw_input.  After 
> enter is pressed, it exits back to the command prompt as it should.
> 
> I'm wondering if there's a way that I can make the thread stop waiting 
> for input.  Even sys.exit() still leaves it waiting.  It's not a big 
> deal, but it bugs me.
> 
> Any ideas?  Should I be using something other than raw_input?  I'm on 
> Windows2000 and running this from the DOS prompt.  I'm using Python 2.4.


From merkosh at hadiko.de  Fri Apr 29 07:46:21 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Fri, 29 Apr 2005 13:46:21 +0200
Subject: anonymous function objects?
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
	<d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
	<1114746052.411476.129880@o13g2000cwo.googlegroups.com>
Message-ID: <d4t6qd$v9s$1@news2.rz.uni-karlsruhe.de>

Friday 29 April 2005 05:40 am Michele Simionato wrote:

> Uwe Mayer:
>> Why does the "print" statement return a syntax error here?
> 
> Google for "Python regrets" where Guido admits that
> 'print' should have been a function.

:) Will this change in future - and if not, why not?

Ciao
Uwe     


From tjreedy at udel.edu  Tue Apr 26 19:06:42 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 26 Apr 2005 19:06:42 -0400
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com><d4kh4q$tqf$1@domitilla.aioe.org>	<86wtqqm27r.fsf@guru.mired.org><d4ktck$r9a$1@domitilla.aioe.org>	<86is29n9cg.fsf@guru.mired.org><d4l825$mj7$1@domitilla.aioe.org><mailman.2525.1114534435.1799.python-list@python.org>
	<d4md4t$gfm$1@domitilla.aioe.org>
Message-ID: <d4mh8c$jr2$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:d4md4t$gfm$1 at domitilla.aioe.org...
> So there are currently 7 implementations or variations of the Python 
> language and you are suggesting I make another one?

Perhaps you missed the winkie ;-)

> The Pacman (binary executable) that I played on a 286 a decade ago still 
> works well on my brother's pentium III system, so from the point of a 
> user, it is backward compatible.

How well does it work on a P4 WinXP system?  If it does, you're lucky.  I 
have games that will not run in spite of the compatibility settings being 
set.  And so I will keep a Win95 machine and a Win98 machine for as long as 
they run.

>The same can't be said for .pyc files

The same *can* be said for some decade-old .py files.  Certainly, most 
everything written for 2.0 onward still works.  The same will also be true 
for .pyc files as long as you run them with their corresponding binary and 
as long as the binary stills run.

However, .pyc files are private, temporary caches created by a CPython 
interpreter for its own use and tied to its current implementation 
technology.  They are not intended to be a public distribution form and 
indeed cannot be a means to run Python programs on other interpreters. 
Guido has stated that he want the freedom to change or even replace parts 
of the internal implementation as he sees fit. (2.5 will probably get a new 
compiler, with the difference mostly transparent to users.)

One of the principles of OOP is separation of interface from 
implementation.  User of a class should only use the public interface and 
not depend on private implementation.  One reason is so implementation can 
be changed even radically as long as interface is kept constant.  The 
Python language is interface.  CPython bytecodes are implementation.

> What I do have resources (time and energy) for is to work with the 
> maintainers of PyPI to implement the package maintenance system I've 
> described......

Good.  I agree that we need more along that line.

Terry J. Reedy





From claudio.grondi at freenet.de  Wed Apr  6 16:06:13 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 6 Apr 2005 20:06:13 -0000
Subject: (win32) speedfan api control
References: <Kln3e.13905$e06.7165@twister.socal.rr.com>
	<3b8m2tF6enbpaU1@individual.net>
	<b3a3df2d.0504051532.15e882d4@posting.google.com>
Message-ID: <3bimomF6jgc5vU1@individual.net>

I have got the specs for SpeedFan from
the SpeedFan author :-) ,
but ...
inbetween I found, that full specs of the
shared memory access to
fan speeds, board, CPU temperature data
are also exposed by the MBM application
  http://mbm.livewiredev.com
and already published online
(including C, VB, Delphi code examples).
but ...
I failed to get the data into
a Python script :-( .
For details see my other
"Problem with access to shared memory(W2K) /
ORIGINALLY (win32) speedfan api control"
posting.

Claudio


"Almico" <google at almico.com> schrieb im Newsbeitrag
news:b3a3df2d.0504051532.15e882d4 at posting.google.com...
> "Claudio Grondi" <claudio.grondi at freenet.de> wrote in message
news:<3b8m2tF6enbpaU1 at individual.net>...
> > your script works ok on my W2K box :-).
> >
> > It makes me curious if I can get also the
> > temperatures into Python script for
> > further processing as easy as the setting
> > of the checkbox is done? (I have not
> > much experience with this kind of
> > programming yet)
> > May I ask how did you get the
> > "TJvXPCheckbox" and the other
> > values necessary to access the program
> > GUI ? (as I can see, there is no source
> > code of SpeedFan available) ?
>
> SpeedFan publishes a Shared Memory area. Drop SpeedFan's author (me
> :-)) an email to get its specs.




From kent37 at tds.net  Thu Apr 21 08:15:59 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 21 Apr 2005 08:15:59 -0400
Subject: Using Jython in Ant Build Process
In-Reply-To: <d46p19$pmc$1@domitilla.aioe.org>
References: <d46p19$pmc$1@domitilla.aioe.org>
Message-ID: <42679538$1_3@newspeer2.tds.net>

Maurice LING wrote:
> I am looking for a way to use Jython in Ant build process. I have some 
> pure Python scripts (not using any C extensions) that I'll like to 
> incorporate into Java using Jython. I heard that this can be done but 
> you can I set up Ant to do this? Sorry, I'm no expert with Ant.

The ant <script> task lets you embed Jython in Ant build files using Bean Scripting Framework. See 
the Ant docs for <script> for some (non-Jython) examples.

The links in the Ant docs are out-of-date.
BSF is here: http://jakarta.apache.org/bsf/manual.html
Jython is here: http://www.jython.org

Kent


From mfranklin1 at gatwick.westerngeco.slb.com  Tue Apr  5 09:22:27 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Tue, 05 Apr 2005 14:22:27 +0100
Subject: check interpreter version before running script
In-Reply-To: <42528ce5$0$26833$626a14ce@news.free.fr>
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
	<42528ce5$0$26833$626a14ce@news.free.fr>
Message-ID: <d2u3av$2p2$1@sea.gmane.org>

F. Petitjean wrote:
> Le Tue, 05 Apr 2005 08:57:12 -0400, rbt a ?crit :
> 
>>Is there a recommended or 'Best Practices' way of checking the version 
>>of python before running scripts? I have scripts that use the os.walk() 
>>feature (introduced in 2.3) and users running 2.2 who get errors. 
>>Instead of telling them, 'Upgrade you Python Install, I'd like to use 
>>sys.version or some other way of checking before running.
>>
>>
>>I thought of sys.version... but getting info out of it seems awkward to 
>>me. First 5 chars are '2.4.1' in string format have to split it up and 
>>convert it to ints to do proper checking, etc. It doesn't seem that 
>>sys.version was built with this type of usage in mind. So, what is the 
>>*best* most correct way to go about this?
> 
> try:
>     from os import walk as os_walk
> except ImportError:
>     os_walk = None
>     # raise some exception  or implement a fallback solution
> # use os_walk instead of os.walk
> 
>>Thanks,
>>
>>rbt

You may be interested in this...


http://www.jorendorff.com/articles/python/path/


as an alternative to the os.path functions...
Martin




From jepler at unpythonic.net  Mon Apr  4 09:21:19 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 4 Apr 2005 08:21:19 -0500
Subject: Tkinter - pixel or widget color
In-Reply-To: <d2quod$1iuv$1@ns.felk.cvut.cz>
References: <d2quod$1iuv$1@ns.felk.cvut.cz>
Message-ID: <20050404132118.GC15341@unpythonic.net>

On Mon, Apr 04, 2005 at 10:43:11AM +0200, pavel.kosina wrote:
> I would need to get at canvas pixel color under certain moving widget or 
> better (= faster?) colors/"types" of underlying static widgets that are 
> of polygon shape (not rectangle).

I don't believe this information is available anywhere, unfortunately.

Jeff
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From grig.gheorghiu at gmail.com  Sat Apr  9 12:44:14 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 9 Apr 2005 09:44:14 -0700
Subject: SoCal Piggies meeting Tuesday 4/12
Message-ID: <1113065053.977165.165520@z14g2000cwz.googlegroups.com>

The Southern California Python Interest Group (SoCal Piggies) will meet
Tuesday April 12 @ 7:30 PM, at the Kerckhoff Marine Lab in Newport
Beach. If you're a Pythonista in the area and you're interested in
participating, please e-mail socal-piggies at lists.idyll.org and
request more info.

Thanks,

Grig



From jesper.olsen at gmail.com  Sat Apr 23 11:53:48 2005
From: jesper.olsen at gmail.com (Jesper  Olsen)
Date: 23 Apr 2005 08:53:48 -0700
Subject: Trouble Installing TTX/FontTools (asks for .NET Framework
	Packages)
In-Reply-To: <1113895106.385196.310650@g14g2000cwa.googlegroups.com>
References: <1113874162.678930.249700@g14g2000cwa.googlegroups.com>
	<1113895106.385196.310650@g14g2000cwa.googlegroups.com>
Message-ID: <1114271628.513013.158090@l41g2000cwc.googlegroups.com>


weston wrote:
> This problem may be addressed here:
>
> http://sourceforge.net/mailarchive/message.php?msg_id=1702374
>
> Apparently setup.py tries to compile a c file, which of course
doesn't
> work if there's no compiler.

In fact it does not work even if there is a compiler - seems distutils
has been broken in python2.4 (it works in python2.3).

Jesper



From jerf at jerf.org  Fri Apr 22 22:43:13 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 22 Apr 2005 22:43:13 -0400
Subject: Python Imaging Library and PyGTK - color image path?
Message-ID: <pan.2005.04.23.02.43.12.576815@jerf.org>

I have an image in the Python Image Library. I'm trying to get it into
PyGTK in color. Is there any way to do this cross-platform, preferably
without writing to anything to the disk?

PIL apparently can't write XPMs. GTK will only take XPMs, that I can see.
Therein lies the rub. I can ship over monochrome bitmaps via XBM, but I'd
rather be able to ship over full color.

(Use case, in case it matters: I am trying to embed a graphic into a text
widget. This is going fine. Because I want the text widget to be able use
different size text, and no one image can look right with everything from
8pt to 40pt text (all reasonable possibilities), I load a large image in
from the disk and scale it down as needed; the images are designed to
scale well and later I can make multiple source images if that is
desirable. But I can't figure out how to get the scaled image into GTK.
This surprises me.)

If there's an easy Google search, it has eluded me.


From dimitri.pater at gmail.com  Tue Apr 12 17:49:27 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Tue, 12 Apr 2005 23:49:27 +0200
Subject: nested tuple slice
Message-ID: <e75321bd0504121449454c7581@mail.gmail.com>

hello!

I want to change a nested tuple like:
tuple = (('goat', 90, 100), ('cat', 80, 80), ('platypus', 60, 800))
into:
tuple = (('goat', 90), ('cat', 80), ('platypus', 60))

in other words, slice the first elements of every index

Any ideas on how to do this in an elegant, pythonic way?

Best regards,
Dimitri
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From ajikoe at gmail.com  Tue Apr 26 06:12:30 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 26 Apr 2005 03:12:30 -0700
Subject: delete will assure file is deleted?
Message-ID: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>

Hello,

If I use os.remove(fileName), does it always assure that the code will
move to the next code only if the fileName is deleted completely?

Pujo



From lbruno at republico.estv.ipv.pt  Thu Apr  7 05:50:48 2005
From: lbruno at republico.estv.ipv.pt (Luis Bruno)
Date: Thu, 7 Apr 2005 10:50:48 +0100
Subject: logging as root using python script
In-Reply-To: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
Message-ID: <20050407105048.00004cd2@LAB2-13.esi>

Raghul wrote:

> What I need is when I execute a script it should login as root and
> execute my command and logout from root to my existing account.

I'm not sure of what you need, so I'll assume your *whole* .py script
needs root priviledges. In this case, you can configure sudo(8) or use
su(1).

For example, the script below does nothing special:

| #!/usr/bin/env python
| 
| print "Hello world!"

You can run it with higher priviledges if you use sudo(8):

$ chmod 755 hello.py
$ sudo ./hello.py

Or you can use su(1):

$ su - root -c ./hello.py

You can configure sudo(8) to not prompt for any password, BTW.

Cheers!
-- 
Luis Bruno


From mahs at telcopartners.com  Sat Apr  9 16:55:48 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 09 Apr 2005 13:55:48 -0700
Subject: Puzzling OO design problem
In-Reply-To: <1113071743.646134.218180@l41g2000cwc.googlegroups.com>
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>	<mailman.1593.1113005609.1799.python-list@python.org>	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>	<mailman.1596.1113015264.1799.python-list@python.org>	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>	<mailman.1607.1113039130.1799.python-list@python.org>	<1113043759.765568.9920@o13g2000cwo.googlegroups.com>	<mailman.1622.1113063262.1799.python-list@python.org>
	<1113071743.646134.218180@l41g2000cwc.googlegroups.com>
Message-ID: <d39fba$79i$1@sea.gmane.org>

George Sakkis wrote:
>>Have you considered a 'macro' solution composing source?
> 
> 
> Can you elaborate on this a little ? You mean something like a
> template-based code generating script that creates all the boilerplate
> code for each version before you start customising it ? 

I was thinking more along the lines of repeatable code generation.
I started from this idea: 
http://groups-beta.google.com/group/comp.lang.python/msg/77ef889e9f99696c
which is a straightforward wrapping case, but illustrates source code 
composition/generation.

Now given that you have:
#World1.py

class Field:
     ...
class Movable
     ...
etc...


#Then in World2Delta.py

class FieldDelta:
    """just the classes that have changed"""
    def somemethod(self):
     """just the methods that are added or changed
        you could even have nomenclature for method deletion, (a lack which
        sometimes bugs me in OO schemes)"""
	etc...


then you have a 'makefile' that generates a new module for each of your worlds

#makefile.py

def generateWorld(baseworld, delta, newworld):
     """reads two modules:
        baseworld defines the 'superclasses'
        delta defines any changes to these
        writes module newworld, that contains complete
        source for all the classes in the model, with no
        external dependencies
     """

I haven't tried it, but I'm sure it is fairly straightforward to implement (and 
very easy to test).


This could be
> an option, though you'd better be pretty sure that the template is
> frozen; you don't want to go back and fill in the template more than
> once !

I envisage something that could be regenerated at will, simply by re-running the 
makefile.

The thing that would need to be frozen is the inheritance graph within each 
world.  If you want to change that between versions, that would make 
generateWorld much more complex.

The general advantage that I see with this approach is that whatever the hoops 
you have to jump through to get the makefile process working right - the result 
is extremely simple to verify.  You would also probably get better performance, 
by avoiding so much subclassing (not that you mentioned that as factor, but...)

Michael














From fredrik at pythonware.com  Sun Apr 17 09:30:17 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 17 Apr 2005 15:30:17 +0200
Subject: unicode "em space" in regex
References: <1113652436.971442.311570@z14g2000cwz.googlegroups.com><4261442D.1010800@v.loewis.de>
	<1113744266.026254.183300@o13g2000cwo.googlegroups.com>
Message-ID: <d3to61$gav$1@sea.gmane.org>

Xah Lee wrote:

> "Regular expression pattern strings may not contain null bytes, but can
> specify the null byte using the \number notation."
>
> What is meant by null bytes here? Unprintable chars??

no, null bytes.  "\0".  "\x00".  ord(byte) == 0.  chr(0).

> and the "\number" is meant to be decimal? 

octal.  this is explained on the "Regular Expression Syntax" page.

> and in what encoding?

null byte encoding?  you're confused.

</F>



From bokr at oz.net  Thu Apr 21 21:37:13 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 01:37:13 GMT
Subject: Strings
References: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
	<UbqdnXN1cNHbKfrfRVn-rw@powergate.ca>
Message-ID: <42685006.189617365@news.oz.net>

On Thu, 21 Apr 2005 10:09:59 -0400, Peter Hansen <peter at engcorp.com> wrote:

>Dan wrote:
>> I've having trouble coming to grip with Python strings.
>> 
>> I need to send binary data over a socket.  I'm taking the data from a
>> database.  When I extract it, non-printable characters come out as a
>> backslash followed by a three numeric characters representing the
>> numeric value of the data.  I guess this is what you would call a raw
>> Python string.  I want to convert those four characters ( in C-think,
>> say "\\012" ) into a single character and put it in a new string.
>
>Does this help?
>
> >>> s = 'foo \\012 bar'
> >>>
> >>> s.decode('string-escape')
>'foo \n bar'
> >>> print s.decode('string-escape')
>foo
>  bar
> >>>
>
>Note that the \n in the first one is because I didn't
>*print* the result, but merely allowed the interpreter
>to call repr() on it.  repr() for a newline is of course
>backslash-n, so that's what you see (inside quotation marks)
>but the string itself has only 9 characters in it, as
>you wished.
When I wonder how many characters are actually in a_string, I find
list(a_string) helpful, which BTW also re-reprents equivalent escapes
in a consistent way, e.g., note \n's at the end:

 >>> s= 'escapes \\n \n \x0a \012'
 >>> list(s)
 ['e', 's', 'c', 'a', 'p', 'e', 's', ' ', '\\', 'n', ' ', '\n', ' ', '\n', ' ', '\n']

OTOH, don't try that with '\a':

 >>> list('\a \x07 \07')
 ['\x07', ' ', '\x07', ' ', '\x07']

Why not like \n above or like \t

 >>> list('\t \x09 \011')
 ['\t', ' ', '\t', ' ', '\t']

Is this fixed by now? It's not news ;-)

 >>> '\a'
 '\x07'

Regards,
Bengt Richter


From peter at engcorp.com  Mon Apr 25 12:48:49 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 25 Apr 2005 12:48:49 -0400
Subject: Multiple tuples for one for statement
In-Reply-To: <mailman.2473.1114446257.1799.python-list@python.org>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>	<200504251356.07715.james@wrong.nu>	<426CF1D5.E9F4396@pauahtun.org>	<200504251457.28724.james@wrong.nu>	<mailman.2456.1114437838.1799.python-list@python.org>	<JoCdna5WP9b3Z_HfRVn-vA@powergate.ca>
	<mailman.2473.1114446257.1799.python-list@python.org>
Message-ID: <uNKdnSHQLpLEgvDfRVn-pQ@powergate.ca>

Ivan Van Laningham wrote:
> I can see that now.  I had three hours sleep last night and my brain
> hurts, so I don't get it.  I seek enlightenment.

So do I: did you mean you don't even "get" what
my code is doing, or you don't get what the OP
really wanted, or something else?

(My sample works only because I created tuples that
had exactly three items each, of course.  It's the
same as your previous code which didn't work, except
for the number of elements in each tuple.  I wrote
it just to show that R.C.James's idea was a reasonable,
if probably mistaken, interpretation of the OP's request.)

-Peter


From sam_spam_cat at comcast.net  Sun Apr 10 20:35:10 2005
From: sam_spam_cat at comcast.net (Sam the Cat)
Date: Sun, 10 Apr 2005 20:35:10 -0400
Subject: help with wxPython and wxGrid
Message-ID: <LNWdnelNabejW8TfRVn-tg@comcast.com>

using "from wxPython.wx import *" under python2.3 I cannot seem to find the
wxGrid class -- it says its undefined -- am I missing something obvious ?  I
know the globalspace import is not the best, but that how I got started
;) -- any help owuld be appreciated




From steve at holdenweb.com  Tue Apr 12 08:57:19 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 08:57:19 -0400
Subject: Python license (2.3)
In-Reply-To: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3ggd3$i2b$1@sea.gmane.org>

Antoon Pardon wrote:
> I have made a module derived from the Queue module deliverd
> with python 2.3. I would like to make this module (called
> tube) available for other people. However it is not clear
> to me how I can do this in accordance with the python
> license.
> 
> First of all it seems I have to make a sumary of how
> my module differs from the original.
> 
That would seem to apply primarily because this is a derivative product 
of a Python distribution. Therefore, your description could be limited 
to "removed the rest of the distribution" followed by specific details 
of your changes making Queue into tube.

> Second it seems I have to include the following in
> my code:
> 
>   "Copyright (c) 2001, 2002 Python Software Foundation;
>    All Rights Reserved"
> 
> Do I understand correctly?
> 
I believe so.

> Because I don't mind the first but I'm not so happy
> with the second. Are there other things I have to
> watch out for?
> 
Since the PSF copyrighted the original work from which you are deriving, 
you have already agreed to do this in any distributed derived work:

   http://www.python.org/2.3/license.html

clearly says """provided, however, that PSF's License Agreement and 
PSF's notice of copyright, i.e., "Copyright (c) 2001, 2002, 2003 Python 
Software Foundation; All Rights Reserved" are retained in Python 2.3 
alone or in any derivative version prepared by Licensee."""

Should we wait until you publish tube and then remove *your* attribution 
to claim the code as our own?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From max at alcyone.com  Wed Apr  6 18:16:51 2005
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 06 Apr 2005 15:16:51 -0700
Subject: Overwrite just one line? Am I a n00b or is this impossible?
 Both? :D
In-Reply-To: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>
References: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>
Message-ID: <PtKdnVpGjLlOwsnfRVn-gg@speakeasy.net>

Matt at revera wrote:

> I'd like to overwrite just one line of a binary file, based on a
> position set by seek().  Is there no way to do this? As far as I can
> tell I need to read the whole file, change the line, and write it all
> back out.  Not exactly easy on the memory, but I see no other solution.

You need to find what "just one line" means in a binary format.  If the 
chunk you're replacing and the chunk you want to replace it with are of 
different sizes, then you need to use a temporary file (or read the 
remainder of the file in memory).

Otherwise, open the file in read-write binary mode ("r+b") and seek and 
write appropriately.  In the general case, you need to write to a 
temporary file to get the job done.

Memory usage is not a factor, here; read and write the temporary files 
in chunks.  That way you can manage the memory usage to whatever upper 
bound you wish.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Be able to be alone. Lose not the advantage of solitude.
   -- Sir Thomas Browne


From rkern at ucsd.edu  Mon Apr  4 18:17:35 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 04 Apr 2005 15:17:35 -0700
Subject: Status of Chaco?
In-Reply-To: <1112642906.229193.14360@g14g2000cwa.googlegroups.com>
References: <1112642906.229193.14360@g14g2000cwa.googlegroups.com>
Message-ID: <d2seag$hf7$1@sea.gmane.org>

Tim Lesher wrote:
> I recently had reason to look up Chaco again, but after searching the
> SciPy and Enthought websites, I see it seems to have gone missing.
> 
> Looking over c.l.p, I can find only one quasi-recent message from Eric
> about at, from almost a year ago:
> 
> 
>>Chaco has moved to a new package.  We hope to have it released within
>>the next few weeks.
> 
> 
> Is Chaco dead?  Or just pining?

It is in active development in-house. If you are on Windows, you can get 
the test release of Enthon, which has the latest Chaco.

   http://www.enthought.com/downloads/downloads.htm

There is an SVN server with anonymous read-access. You can ask Eric 
Jones for the address.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From news at NOwillmcguganSPAM.com  Wed Apr 13 11:28:24 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Wed, 13 Apr 2005 16:28:24 +0100
Subject: Codig style: " or """
In-Reply-To: <mailman.1842.1113405204.1799.python-list@python.org>
References: <mailman.1842.1113405204.1799.python-list@python.org>
Message-ID: <425d3a98$0$26335$db0fefd9@news.zen.co.uk>

Sara Khalatbari wrote:
> Hi!
> 
> Suppose you're writing a module & writing the
> definition of each function in that module in " or
> """.
> for example:
> a) "This function does this & that"
> or:
> b)  """This function does blah blah blah"""
> 
> What are the differences between " and """ ? 
> I'm using gedit & I wanna know a bit about coding
> style.
> 
> To be very honest: I have a very strict boss who looks
> for bugs in my codes & he insists to know exactly
> which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
> my coding style on when using " or """.
> 
> Can anybody out there give me some hint?
> Can anybody tell me where to find a document on python
> coding style.

Triple quotes allow you to have quotes inside the string. I tend to use 
triple quotes if I'm writing text of any length, that way I dont need to 
change anything if I do need to insert a quote. I dont think its a 
matter of coding style, its purely a practical issue. If your PHB 
insists on consistency, I would just use """


Will McGugan

-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From steven.bethard at gmail.com  Fri Apr  1 04:39:29 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 01 Apr 2005 02:39:29 -0700
Subject: Ternary Operator in Python
In-Reply-To: <mailman.1172.1112340286.1799.python-list@python.org>
References: <mailman.1172.1112340286.1799.python-list@python.org>
Message-ID: <AZGdnQAxtp8ri9DfRVn-iw@comcast.com>

praba kar wrote:
> Dear All,
>     I am new to Python.  I want to know how to
> work with ternary operator in Python.  I cannot
> find any ternary operator in Python.

http://www.python.org/peps/pep-0308.html


From vincent at visualtrans.de  Tue Apr 19 14:38:07 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Tue, 19 Apr 2005 20:38:07 +0200
Subject: Encoding Questions
References: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>
Message-ID: <d43j6h$5ub$1@news4.zwoll1.ov.home.nl>


<jalil at feghhi.com> schrieb im Newsbeitrag 
news:1113934291.419258.314390 at o13g2000cwo.googlegroups.com...
| 1. I download a page in python using urllib and now want to convert and
| keep it as utf-8? I already know the original encoding of the page.
| What calls should I make to convert the encoding of the page to utf8?
| For example, let's say the page is encoded in gb2312 (simple chinese)
| and I want to keep it in utf-8?

Something like:

utf8_s = s.decode('gb2312').encode('utf-8')

- with s being the simplified chinese string - should work.

|
| 2. Is this a good approach? Can I keep any pages in any languages in
| this way and return them when requested using utf-8 encoding?
|
| 3. Does python 2.4 support all encodings?

See http://docs.python.org/lib/standard-encodings.html for an overview.

|
| By the way, I have set my default encoding in Python to utf8.
|

Why would you want to do that?

--

Vincent Wehren

|
| I appreciate any help.
|
| -JF
| 




From bokr at oz.net  Fri Apr 22 12:10:48 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 16:10:48 GMT
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
Message-ID: <42691bbe.241769556@news.oz.net>

On 22 Apr 2005 05:29:48 -0700, pyguy2 at gmail.com wrote:

>click on my computer
>Then select tools->folder options->File Types
>
>scroll down the where the py extension is defined, highlight it, click
>on advanced
>then highlight open and hit the edit button.
>
>There you should see python.exe with some other stuff, change it to
>pythonw.exe

>Then, in the future,  if you click on a python program, it should use
>pythonw.exe

This change is NOT a good idea!!

Files with .py should almost always run with a console window.
For an execption to that, you can always change a particular shortcut to
do what you like, including bringing it up in gvim instead of running it.
Or you can change the extension to .pyw to get pythonw.exe association.
Or you can run it manually either way.

>The steps should be roughly similar on different versions of windows.
>
>I always liked the #! syntax of unix, too bad MS doesn't have it. And,
>too bad their command prompt sucks, too bad process creation is heavy,
>too bad . . .
What do you mean by "their command prompt"? The actual prompt of cmd.exe
or the command line interpretation? I agree the latter sucks, but I could
change the shell if I wanted to go to the trouble. Sometimes I run msys.
But the actual shell that starts when I log in could be changed too.

Actually, I don't really like os system info mixed in with application
info, which is what #! lines and other file-tagging magic is. I think
it belongs closely associated with the file, but not in it. Likewise
I don't like the use of current-container-name (file name) as content-name
(which should be a persistent name associated with the content, not with
the latest container that happens to contain a copy). But that's another rant ;-)

Regards,
Bengt Richter


From http  Sun Apr  3 19:58:59 2005
From: http (Paul Rubin)
Date: 03 Apr 2005 16:58:59 -0700
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <7x3bu8t7or.fsf@ruckus.brouhaha.com>
	<mailman.1272.1112567512.1799.python-list@python.org>
Message-ID: <7xacofo1j0.fsf@ruckus.brouhaha.com>

"Terry Reedy" <tjreedy at udel.edu> writes:
> > But assert statements vanish when you turn on the optimizer.  If
> > you're going to run your application with the optimizer turned on, I
> > certainly hope you run your regression tests with the optimizer on.
> 
> I don't see why you think so.  Assertion statements in the test code make 
> it harder, not easier for the test to pass.  Ditto, I believe, for any in 
> the run code, if indeed there are any.

If the unit tests are expressed as assert statements, and the assert
statements get optimized away, then running the unit tests on the
optimized code can obviously never find any test failures.


From theller at python.net  Sat Apr 23 08:23:36 2005
From: theller at python.net (Thomas Heller)
Date: Sat, 23 Apr 2005 14:23:36 +0200
Subject: Python callbacks & PyGILState_Release()
References: <mailman.2334.1114226424.1799.python-list@python.org>
Message-ID: <vf6dadh3.fsf@python.net>

Randall Hopper <viznut at charter.net> writes:

>      What is the correct way to propagate exceptions from Python callbacks?
>
>      When I do this:
>
>      Python -> C++ -> Python Callback
>
> (example attached) an exception raised in the callback doesn't make it back
> across C++ to Python.
>
>      It appears that PyGILState_Release() at the bottom of the callback
> wrapper is resetting the error state (as I can set a global based on
> PyErr_Occurred() there, and can catch that up in the exception handler in
> Python).
>
>      This obviously isn't correct.  What should I be doing?
>
> Thanks,
>
> Randall
>
>
> ------------------------------------------------------------------------------
> void callback_wrapper( void *user_data )
> {
>   // Acquire interpreter lock
>   PyGILState_STATE gstate = PyGILState_Ensure();
>   ...
>   // Call Python
>   pyresult = PyEval_CallObject( pyfunc, pyargs );
>   ...
>   /*********** At this point, PyErr_Occurred() is true   **************/
>   /****** But it's not true when we return through C++ to Python  ******/

    if (pyresult == NULL)
        PyErr_Print();

>   // Free interpreter lock
>   PyGILState_Release(gstate);
> }

PyErr_Print() will do the 'right' thing?s.

Thomas


From jyap80 at gmail.com  Mon Apr 11 06:52:45 2005
From: jyap80 at gmail.com (jyap80 at gmail.com)
Date: 11 Apr 2005 03:52:45 -0700
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
Message-ID: <1113216765.784331.156820@f14g2000cwb.googlegroups.com>

MySQL is an excellent option is very well documented.  It is also a
defacto standard for OpenSource databases.

You will need to install the Python module MySQLdb.  -->
http://sourceforge.net/projects/mysql-python

There should be plenty of examples online too for using MySQLdb with
Python.

If you get more advanced, you can look into the SQLObject module which
allows you to use databases in a more Pythonic objective way.

Julian
http://julianyap.blogspot.com



From cam.ac.uk at mh391.invalid  Wed Apr 20 08:55:41 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 20 Apr 2005 13:55:41 +0100
Subject: Writing to stdout and a log file
In-Reply-To: <1113958286.367038.182330@z14g2000cwz.googlegroups.com>
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
	<mailman.2142.1113957130.1799.python-list@python.org>
	<1113958286.367038.182330@z14g2000cwz.googlegroups.com>
Message-ID: <d45jgf$bks$1@gemini.csx.cam.ac.uk>

Mike wrote:

> I should've mentioned I want StdoutLog to subclass the 'file' type
> because I need all the file attributes available.

You might use a surrogate pattern. Here's one I use for this kind of 
situation, where I want to subclass but that can't be done for some reason.

class SurrogateNotInitedError(exceptions.AttributeError):
     pass

class Surrogate(object):
     def __init__(self, data):
         self._data = data

     def __getattr__(self, name):
         if name == "_data":
             raise SurrogateNotInitedError, name
         else:
             try:
                 return getattr(self._data, name)
             except SurrogateNotInitedError:
                 raise SurrogateNotInitedError, name

I'll leave it as an exercise to the reader to make this work when 
self._data is actually a list of objects instead of a single object. 
You'll obviously need special logic for different methods, like write(), 
since for some of them you will want to call every object in self._data, 
and others only a single object.
-- 
Michael Hoffman


From jarrod.roberson at gmail.com  Wed Apr 20 11:40:06 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 20 Apr 2005 08:40:06 -0700
Subject: Faster os.walk()
Message-ID: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>

I am trying to get the number of bytes used by files in a directory.
I am using a large directory ( lots of stuff checked out of multiple
large cvs repositories ) and there is lots of wasted time doing
multiple os.stat() on dirs and files from different methods.



From shane at hathawaymix.org  Fri Apr 22 15:26:21 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Fri, 22 Apr 2005 13:26:21 -0600
Subject: gui developing
In-Reply-To: <200504222027.40280.james@wrong.nu>
References: <mailman.2295.1114191326.1799.python-list@python.org>	<116iir4hq8muc62@corp.supernews.com>
	<200504222027.40280.james@wrong.nu>
Message-ID: <42694FDD.1070908@hathawaymix.org>

R. C. James Harlow wrote:
> Qt, in my opinion, is as excellent as python in the consistency stakes, has 
> the best documentation bar none, an excellent set of python bindings, the 
> best free layout tool, and an active and helpful community.
> 
> The killer, of course, is that there's no free windows port, so if you're 
> doing free software that you want to run on linux then you're stuffed.

That situation is about to change: Qt 4 for Windows will be available
under the GPL.

http://www.trolltech.com/newsroom/announcements/00000192.html

However, I haven't heard whether PyQt for Qt 4 will also be available
under the GPL.

Shane


From irmen.NOSPAM at xs4all.nl  Sat Apr  2 11:15:28 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 02 Apr 2005 18:15:28 +0200
Subject: Performance issue
In-Reply-To: <mailman.1239.1112456748.1799.python-list@python.org>
References: <mailman.1239.1112456748.1799.python-list@python.org>
Message-ID: <424ec521$0$149$e4fe514c@news.xs4all.nl>

Tom Carrick wrote:
> Hi,
> 
> In my attempted learning of python, I've decided to recode an old
> anagram solving program I made in C++. The C++ version runs in less
> than a second, while the python takes 30 seconds. I'm not willing to
> think it's just python being slow, so I was hoping someone could find
> a faster way of doing this.

I like your attitude, not thinking that it's just Python that is slow :-)

> Also, I was wondering if there was a more
> builtin, or just nicer way of converting a string to a list (or using
> the sort function on a list) than making a function for it.

String to list:   list("irmen")  # --> ['i','r','m','e','n']
Sorted list:      sorted("irmen")   # --> ['e', 'i', 'm', 'n', 'r']
(the latter works in Python 2.4+)

> 
> The words.txt here is just a copy of FreeBSD's /usr/share/dict/words
> 
> Anyway, the code:
> 
> import string
> 
> # Need a function to convert a string to a list to be
> # able to use the sort() function
> def string2list(s):
>     l = []
>     for i in range(0, len(s)):
>         l.append(s[i])
>     return l

... see above... just replace string2list(s) with sorted(s)

> 
> words = []
> found = []
> 
> anagram = raw_input("Find anagrams of word: ")
> 
> f = open('words.txt', 'r')
> file = f.read()
> f.close()

Style: don't use 'file' as a variable name, you're hiding the
builtin 'file' function

> 
> words = file.splitlines()

You can obtain this list without reading the file in its entirety,
by using the readlines method of file objects:

words=open("words.txt").readlines()

> 
> sorted_anagram = anagram.lower()
> sorted_anagram = string2list(anagram)
> sorted_anagram.sort(lambda x, y: cmp(x, y))

The lambda is optional and only slows it down :-)
But to get a sorted list of letters, just use sorted(s)
if you're on Python 2.4+

> while words:
>     if len(words[0]) == len(sorted_anagram):
>         wordlist = string2list(words[0])
>         wordlist.sort(lambda x, y: cmp(x, y))
>         sorted_wordlist = wordlist

(same here.. replacing this by sorted(words[0]) probably
will speed it up rather significantly, partly because
it avoids the creation of those temporary lists)

>         if sorted_anagram == sorted_wordlist:
>             found.append(words[0])
>     del words[0]
> 
> print "Anagrams of " + anagram + ": "
> while found:
>     print found[0] + " "
>     del found[0]

print " ".join(found)


Cheers

--Irmen de Jong


From martin.witte at gmail.com  Thu Apr 14 14:46:30 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 14 Apr 2005 11:46:30 -0700
Subject: Socket Error
In-Reply-To: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
References: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>
Message-ID: <1113504390.087161.157190@z14g2000cwz.googlegroups.com>

You missed the import socket statement. Also the socket.PF_INET should
be socket.AF_INET



From ivanlan at pauahtun.org  Tue Apr  5 17:13:59 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 05 Apr 2005 15:13:59 -0600
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<1112729823.852393.107000@o13g2000cwo.googlegroups.com>
	<1112730821.686753.16250@l41g2000cwc.googlegroups.com>
Message-ID: <4252FF97.3049088@pauahtun.org>

Hi All--

elbertlev at gmail.com wrote:
> 
> Windows: textpad
> Linux: vim
> 

Windows:  gvim
Linux: gvim, or vim if I have to.
Other unices: gvim, vim, vi

SlickEdit doesn't suck.  Emacs doesn't suck, either.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From radam2 at tampabay.rr.com  Wed Apr  6 17:19:39 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Wed, 06 Apr 2005 21:19:39 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>	<mailman.1412.1112744591.1799.python-list@python.org>	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>	<425394bd.436936831@news.oz.net>
	<9rv7515o3o7fomvs5mlhnqrprb72n9arck@4ax.com>
	<mailman.1451.1112814512.1799.python-list@python.org>
Message-ID: <b7e8519mq0th0je12e1mng53t5eceopt1m@4ax.com>


>I find I am still left asking the question "why would anyone want to do 
>that?".


You didn't say which part you were referring too. As far as wrapping
the same exact wrapper more than once. You probably wouldn't do that.
It's just easier to test the use of multiple wrappers that way.

As far as reversing the stack of wrappers, that could matter. Because
the wrappers are nested, the inputs are done in forward order, and the
results are sent back out in reverse order. If you are applying
several different graphic filters to an image display function, the
order makes a difference, so depending on weather you are modifying
the input values, or the returned values, you may need to reverse the
wrappers before applying them.

>The difference between a use case and an example is that a use case 
>should demonstrate the solution of a problem that someone might 
>reasonably be wanting to solve, rather than a way of creating an 
>abstract program structure for which there is no easily observable 
>requirement.

It was an example that demonstrates a basic capabilities of an
alternative approach, but it is also one solution to certain
sub-problems, simpler function wrapping, and adding and removing
wrappers at locations other than the function definitions.  It's
probably not a new approach either.

>I can understand it if you are merely pursuing this topic because of 
>your fascination with the capabilities of Python, but I don't have the 
>feeling that there are legion Python programmers out there waiting 
>impatiently to be able to build wrapped functions.

Yes, I am pursuing the topic because I enjoy experimenting, and
because I enjoy programming with Python, and I have an interest in
using it in solving real problems.  So the answer is all of the above.
;-)

Cheers,
Ron



From jepler at unpythonic.net  Mon Apr  4 09:05:16 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 4 Apr 2005 08:05:16 -0500
Subject: Silly question re: 'for i in sys.stdin'?
In-Reply-To: <gJednSA9hrTLJM3fRVn-oA@comcast.com>
References: <d2q7ni$h3t$1@sea.gmane.org>
	<mailman.1277.1112583592.1799.python-list@python.org>
	<gJednSA9hrTLJM3fRVn-oA@comcast.com>
Message-ID: <20050404130513.GB15341@unpythonic.net>

On Sun, Apr 03, 2005 at 09:49:42PM -0600, Steven Bethard wrote:
> Slick.  Thanks!

does isatty() actually work on windows?  I'm a tiny bit surprised!

Jeff
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From joel-123 at dodgeit.com  Fri Apr  1 06:50:22 2005
From: joel-123 at dodgeit.com (Joel)
Date: 1 Apr 2005 03:50:22 -0800
Subject: Combining digit in a list to make an integer
In-Reply-To: <1112355398.158653.109790@g14g2000cwa.googlegroups.com>
References: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>
	<1112355049.196021.182720@g14g2000cwa.googlegroups.com>
	<1112355398.158653.109790@g14g2000cwa.googlegroups.com>
Message-ID: <1112356222.189976.158110@l41g2000cwc.googlegroups.com>


Harlin Seritt wrote:
> If anyone has time, would you mind explaining the code that Dan
Bishop
> was so kind as to point out to me:
>
> int(''.join(num1))
>
> This worked perfectly for me, however, I'm not sure that I understand
> it very well.
>
> Thanks,
>
> Harlin Seritt

''.join(list of strings) is a python idiom for fast string
concatenation. ''.join(num1) would give "145". The function int() is
then used to convert the resulting string into an integer.



From Gerald.Klix at klix.ch  Fri Apr 15 11:16:25 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Fri, 15 Apr 2005 17:16:25 +0200
Subject: eval function not working how i want it dag namn
In-Reply-To: <d3olf8$7s7$1@gemini.csx.cam.ac.uk>
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
	<d3olf8$7s7$1@gemini.csx.cam.ac.uk>
Message-ID: <425FDAC9.60104@klix.ch>

How about using the vars builtin?

Michael Hoffman schrieb:
> robcarlton wrote:
> 
>> I've written this function to make a list of all of an objects
>> attributes and methods (not for any reason, I'm just learning)
>>
>> def list_members(obj)
>>     l = dir(obj)
>>     return map(lambda x : eval('obj.'+x), l)
> 
> 
> That works fine for me with Python 2.4.
> 
> This is the best way to do it:
> 
> def list_members(obj):
>     return [getattr(obj, name) for name in dir(obj)]
> 
> Although personally I would prefer to have this information in dict 
> form, so i'd use:
> 
> return dict((name, getattr(obj, name)) for name in dir(obj))
> 
> For objects defined in CPython, you can use obj.__dict__, but this is 
> somewhat hacky, and I'd avoid it.

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634



From theller at python.net  Fri Apr 22 11:01:43 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 22 Apr 2005 17:01:43 +0200
Subject: c-extension crashes unexpected
References: <f791a214.0504220637.63492afd@posting.google.com>
Message-ID: <u0lyx3c8.fsf@python.net>

garz at tmft.net (Markus Wintermann) writes:

> /* Wrapper-Funktion f?r apiJob() */
> static PyObject* wrap_apiJob(PyObject* self, PyObject* args) {

> 	PyObject *resultlist;

> 	for (i=0;i<setcount+1;i++) {
> 		PyList_SetItem(resultlist, i, Py_BuildValue("i",i));
>
> 	}

> 	resultlist =  PyList_New(setcount+1);

Do you see it now?

Thomas


From gmayer at cs.bgu.ac.il  Wed Apr 27 05:02:01 2005
From: gmayer at cs.bgu.ac.il (Mayer)
Date: 27 Apr 2005 02:02:01 -0700
Subject: names of methods, exported functions
Message-ID: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>

Hello:

Is there a way to see at the python prompt the names of all the public
methods of a class or the names exported by a module? I know that
GUI-based IDEs have a nifty way of displaying these in the form of a
drop-down list, but I'm looking for some function or method that will
simply return a list of strings.

Thanks,

Mayer



From could.net at gmail.com  Tue Apr  5 00:47:11 2005
From: could.net at gmail.com (could ildg)
Date: Tue, 5 Apr 2005 12:47:11 +0800
Subject: How to merge two binary files into one?
In-Reply-To: <1153vfhid1vfif1@corp.supernews.com>
References: <mailman.1340.1112663541.1799.python-list@python.org>
	<1153pu8pvom6b02@corp.supernews.com>
	<mailman.1344.1112666821.1799.python-list@python.org>
	<1153vfhid1vfif1@corp.supernews.com>
Message-ID: <311b5ce105040421471f0d0f36@mail.gmail.com>

Thank Grant, it works well.

On Apr 5, 2005 10:54 AM, Grant Edwards <grante at visi.com> wrote:
> On 2005-04-05, could ildg <could.net at gmail.com> wrote:
> >> > I want to merge file A and file B into a new file C, All of
> >> > them are binary.
> >>
> >> file('C','wb').write(file('A','rb').read()+file('B','rb').read())
> >
> > Python is really magic, even merge file can use "+".
> 
> You probably shouldn't use the above code for very large files,
> since it reads files A and B entirely into memory before
> writing the combined data to C.
> 
> For large files, something like this is probably a better idea:
> 
> fout = file('C','wb')
> for n in ['A','B']:
>     fin  = file(n,'rb')
>     while True:
>         data = fin.read(65536)
>         if not data:
>             break
>         fout.write(data)
>     fin.close()
> fout.close()
> 
> --
> Grant Edwards                   grante             Yow!  I feel like a wet
>                                   at               parking meter on Darvon!
>                                visi.com
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


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


From nszabolcs at gmail.com  Wed Apr 27 11:36:32 2005
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 27 Apr 2005 08:36:32 -0700
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<mailman.2580.1114613011.1799.python-list@python.org>
Message-ID: <1114616192.342452.178720@o13g2000cwo.googlegroups.com>

it's not quite true since the latest stable release (2.6.0.0)

see the new wx doc (it's generated with epydoc so it's not for C++):
http://www.wxpython.org/docs/api/

i used wxPython with XRCed a few times and i liked the way it works
(worked under linux and win as well for me)

nsz



From jason at tishler.net  Tue Apr 19 17:01:26 2005
From: jason at tishler.net (Jason Tishler)
Date: Tue, 19 Apr 2005 17:01:26 -0400
Subject: How to compile ScientificPython-2.4.9 under XP cygwin
	environment?
In-Reply-To: <a13c8f1c.0504170748.4d28cb0c@posting.google.com>
References: <a13c8f1c.0504170748.4d28cb0c@posting.google.com>
Message-ID: <20050419210125.GA3084@tishler.net>

Zhuanshi,

On Sun, Apr 17, 2005 at 08:48:31AM -0700, Zhuanshi He wrote:
> I try to compile ScientificPython-2.4.9
> (http://starship.python.net/~hinsen/ScientificPython/) under Windows
> XP cygwin environment using python 2.3.3 ,and gcc (GCC) 3.3.3 (cygwin
> special).
> 
> The information shows as fillows:
> 
> [snip]
> 
> Does anyone meet same problem?

I was able to build ScientificPython-2.4.9 with the following
configuration:

    netcdf 3.6.1-beta3
    Numeric 24.0
    Python 2.4
    gcc 3.3.1

Jason

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


From mcfletch at rogers.com  Mon Apr  4 12:06:01 2005
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Mon, 04 Apr 2005 12:06:01 -0400
Subject: Extracting Font Outline informations
In-Reply-To: <06d4e.1168960$35.43275286@news4.tin.it>
References: <06d4e.1168960$35.43275286@news4.tin.it>
Message-ID: <425165E9.8010201@rogers.com>

TTFQuery, built on top of FontTools, allows you to do this.  You can see
use of the extraction in the OpenGLContext/scenegraph/text package,
which uses TTFQuery to implement 3D text rendering.

http://ttfquery.sourceforge.net/
http://pyopengl.sourceforge.net/context/

HTH,
Mike

Gabriele *Darkbard* Farina wrote:

> Hi,
>
> there is a Python library that makes me able to extract outline
> informations from font files? I'd like to manage TrueType and FreeType
> fonts ...
>
> I searched for som wrappers, but I didn't find anything ...
>
> bye

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From sjmachin at lexicon.net  Fri Apr  8 21:27:38 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 09 Apr 2005 11:27:38 +1000
Subject: Read 16 bit integer complex data
References: <1112887876.272539.277420@z14g2000cwz.googlegroups.com>
	<mailman.1490.1112890274.1799.python-list@python.org>
	<1112897070.001472.225740@o13g2000cwo.googlegroups.com>
Message-ID: <dfae51lkp2easse43gl59d85bmtu6madem@4ax.com>

On 7 Apr 2005 11:04:30 -0700, "Greg" <gja at cc.usu.edu> wrote:

>That worked, thanks a lot.

That's great, and given your Matlab background, you'll no doubt find
lots of other uses for numeric / numarray.

I'd just like to make a few other points:

(1) struct.unpack shouldn't be that slow, provided you do it in one
hit -- see example below. Looping, unpacking one or two items at a
time, could be a dog. 

(2) If you are concerned about the efficiency of any particular
feature, time it. Any surprises are usually pleasant.

(3) There is an intermediate alternative -- the built-in array module.
See example below.

(4) Be careful of endian considerations if you are getting data from
"outside".

Example:

>>> import struct
>>> s = struct.pack("hhhh", 1, 2, -3, 4)
>>> ha = array.array('h', s)
>>> ha
array('h', [1, 2, -3, 4])
>>> fmt = '%dh' % (len(s) // 2)
>>> fmt
'4h'
>>> ha2 = struct.unpack(fmt, s)
>>> ha2
(1, 2, -3, 4)
>>> 

Cheers,
John



From mwm at mired.org  Sun Apr 24 15:41:25 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 24 Apr 2005 14:41:25 -0500
Subject: Getting into Python, comming from Perl.
References: <mailman.2409.1114365369.1799.python-list@python.org>
Message-ID: <8664ycq7x6.fsf@guru.mired.org>

Miguel Manso <mmanso at amplitudenet.pt> writes:

> I've tryed to use python some times but I get frustrated very quick. I
> get myself many times needing to figure out how to loop through a
> list, declare an associative array, checking how to pass named
> parameters to functions, and simple things like that.

I went through some of those frustrations.

> What I would like to know is if anyone had these problems and if you
> can share that experience with me. I'm trying to minimize my
> "frustration" :)

The thing is, the answers to all your questions are in the
documentation. You just need to know the Python names for things, and
not the Perl names. For instance, Python calls it's associative array
structure a dictionary, and a checking the documentation index for
dictionary turns up a link to the syntax for declaring one as
display/dictionary.

Read through the tutorial. Then look through some "interesting"
modules in the standard library to see how these things fit together.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From iny+news at iki.fi  Tue Apr 26 01:08:30 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Tue, 26 Apr 2005 08:08:30 +0300
Subject: Object oriented storage with validation
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
	<mailman.2289.1114190176.1799.python-list@python.org>
	<m3k6muaxmi.fsf@iny.iki.fi> <du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi>
	<m3ekd0vd6i.fsf_-_@iny.iki.fi>
	<mailman.2389.1114341599.1799.python-list@python.org>
Message-ID: <m3mzrm15wx.fsf@iny.iki.fi>

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

> Ilpo Nyyss?nen wrote:
>
>> What is the point in doing validation if it isn't done every time? Why
>> wouldn't I do it every time? It isn't that slow thing to do.
>
> DTD validation is useful in two cases:
[...]

I didn't mention DTD validation. Yes, I know the limitations of DTD
validation. DTD validation gives a clear error message with line
number in case of it doesn't match.

Show me this:

- An object oriented storage library
- A flat thing is not enough, needs some hierarchy, like in XML
- Validation that also converts the data to pythonic types, like
numbers to ints or data of my objects to my objects
- Includes a way to define version migration steps
- Parsing and validation must be fast
- Storage format preferably a readable text file
- Easy to use in application

These things would be nice to have in it too:

- Multiple backends, at least text file, XML and SQL database
- Some kind of synchronization or replication utilities

>> Pickle doesn't have validation. I am not comfortable for using it as
>> storage format that should be reliable over years when the program
>> evolves. It also doesn't tell me if my program has put something other
>> to the data than I meant to.
>
> But DTD validation doesn't tell you that either -- it's only concerned
> with the structure, not the content.
[...]

Pickle doesn't have even that. Also I can't read pickle file without
doing some program to dump it in readable format. So, I can't use
validation to make sure the data in pickle is the one I want and I
can't use less to see what is in the file. I really have NO IDEA what
is in a pickle file.

Or, yes, I clearly would need to build the validation myself on top of
it! Not going to happen.

> If you want the simplest thing, get rid of the DTD, and make your
> loader ignore things that it doesn't recognize, use default values for
> fields that are not required (or weren't in the format from the start),
> and give a nice readable error message if something required is
> missing.  That'll give you a nice, portable, reliable, and extremely
> future-proof design.

So my program will just work in the wrong way if I make a typo to a
non-required field when writing the file? No thanks.

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From ajikoe at gmail.com  Fri Apr 15 13:39:24 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 15 Apr 2005 10:39:24 -0700
Subject: mySQL values not updating after query
In-Reply-To: <1113577745.655703.22120@l41g2000cwc.googlegroups.com>
References: <1113577745.655703.22120@l41g2000cwc.googlegroups.com>
Message-ID: <1113586764.112845.70180@f14g2000cwb.googlegroups.com>

Don't forget to call:
  db.commit()

Hope that's help.

Pujo



From jerf at jerf.org  Wed Apr  6 18:44:00 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 06 Apr 2005 17:44:00 -0500
Subject: Python sleep doesn't work right in a loop?
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.04.06.22.44.00.857559@jerf.org>

On Wed, 06 Apr 2005 12:49:51 -0700, ritterhaus wrote:

> Nope. Does't work. Running Python 2.3.4 on Debian, Linux kernel 2.6. This
> is actually test code for a larger project...
> 
> # flash the selected wx.TextControl
> 
> for flasher in range(4):
>     self.textField.SetBackgroundColour(255, 0, 0) time.sleep(0.8)
>     self.textField.SetBackgroundColour(255, 255, 223) time.sleep(0.8)
> 
> Even when I add an explicit call to repaint the TextCtrl between each
> sleep, things appear to be 'queued' until after the loop is fnished. Very
> bizarre.

GUIs don't like "time.sleep". All of them come with some sort of "fire a
timing event in X milliseconds and call this handler". Use that instead.

I believe wx's is the wxTimer class, and the wxFutureCall class looks
promising.

If you want to maintain the same basic calling structure, start playing
games with generators; you can write the same function with "yield", and
then call .next() on an iterator every time the timeout triggers. Best of
both worlds.



From peter at engcorp.com  Mon Apr 11 20:16:17 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 11 Apr 2005 20:16:17 -0400
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <425AF2AB.1030401@v.loewis.de>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
	<425AF2AB.1030401@v.loewis.de>
Message-ID: <aYudnZgTb9XXjsbfRVn-hw@powergate.ca>

Martin v. L?wis wrote:
> Michael Kearns wrote:
>>There are a few problems with this as I see it. In theory, the 'cost' of
>>MSVC 7.1 shouldn't be a problem for a big organisation. However, I
>>wouldn't expect to have to go and buy it purely because I'm developing
>>(perhaps) a shareware application using python - this isn't my case, but
>>I wasn't looking at it from just a big organisation perspective.
> 
> For developers that need msvcr71.dll on the target system which don't
> have a license to distribute it, the solution is simple: they just need
> to advise their users to install python-2.4.1.msi. This comes with
> msvcr71.dll included.

I believe there are no restrictions on us redistributing
python-2.4.1.msi either, which would suggest that it
could simply be included in an installer package, and
perhaps the relevant DLLs could even be extracted from
the msi file without having to install it...  I seem
to recall someone ;-) was making progress on an msi
package for Python which might be capable of this
too.

Of course then you'd need Python installed already in
order to install your application.  On the other hand,
you could always include a copy of Python 2.3 as well,
and use that to extract the DLLs from the MSI.

Or other equally insane approaches ...

-Peter


From eric.nieuwland at xs4all.nl  Wed Apr 20 17:22:23 2005
From: eric.nieuwland at xs4all.nl (Eric Nieuwland)
Date: Wed, 20 Apr 2005 23:22:23 +0200
Subject: Define Constants
In-Reply-To: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>
References: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>
Message-ID: <e5df5b7ab2cd9c596698c1960b499262@xs4all.nl>

codecraig wrote:
>   My directory structure looks like...
>
> C:\
>     --> abc.py
>     --> utils
>         --> __init__.py
>         --> CustomThing.py
>
>   Ok, CustomThing looks like...
>
> TOP = 0
> LEFT = 1
>
> class CustomThing:
>     def __init__(self):
>         self.foo = "foo"
>
>   so, from abc.py I have
>
> from utils.CustomThing import CustomThing
>
> print CustomThing.TOP
>
> but i get an error: AttributeError: class 'CustomThing' has no
> attribute 'TOP'
>
> How can I access those??

You're only importing the class. Try importing the whole module:

from utils import CustomThing
print CustomThing.TOP

--eric



From bokr at oz.net  Fri Apr 22 17:12:07 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 22 Apr 2005 21:12:07 GMT
Subject: rudeness    was:  Python licence again
References: <mailman.2308.1114200498.1799.python-list@python.org>
Message-ID: <426966e5.261008440@news.oz.net>

On Fri, 22 Apr 2005 16:08:12 -0400, Michael.Coll-Barth at VerizonWireless.com wrote:

>Laszlo,
>
>>>> Is it something like 'center' or 'color' for Americans and 'centre' or
>'colour' for British people?
>
>Yes, exactly.  
>
>>>> (Sorry to be offtopic)
>
>No need to apologize.  I started to read the postings on this list and was
>dismayed at the depth of rudeness on here.  I thought that pythonistas might
>be a little more patient/tolerant.  I guess I was wrong.  I understood
>exactly what you wanted to say, I just didn't have an answer.  I did find it
>amusing that the person who incorrectly corrected you, was in fact,
>incorrect.  
>
>I wonder, how many others out there find that the documentation and
>references materials seem to be written for someone that already knows the
>answer, but are indecipherable, at times, for those that don't know the
>answer.
>
I wonder how many people complaining about documentation have noticed
the lines at the bottom of typical python.org doc pages (taken from the
first page of the tutorial at http://docs.python.org/tut/tut.html):

Release 2.4.1, documentation updated on 30 March 2005.
See About this document... for information on suggesting changes. 
    ^^^^^^^^^^^^^^^^^^^
           ^
           |
       clickable link to http://docs.python.org/tut/about.html


Regards,
Bengt Richter


From reinhold-birkenfeld-nospam at wolke7.net  Wed Apr 20 08:04:41 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Wed, 20 Apr 2005 14:04:41 +0200
Subject: goto statement
In-Reply-To: <d45gap$elj$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
Message-ID: <3cmuqpF6km9ruU1@individual.net>

Maxim Kasimov wrote:
> Robert Kern wrote:
>> Maxim Kasimov wrote:
>> 
>>> Simon Brunning wrote:
>>>
>>>> On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
>>>>
>>>>> it would be quite useful for debuging porposes
>>>>
>>>>
>>>>
>>>>
>>>> How does goto help you to remove bugs?
>>>>
>>>> I can certainly see how it helps you put them in in the first place...
>>>>
>>>
>>> if you need to comment a couple of code (and then uncomment ), what 
>>> are you doing then?
>> 
>> 
>> Use comments?
>> 
> 
> WOW, just greate! ... but i'd like to relax at some more interesting way than to comment each of rows

Use multi-line string literals.

'''

This whole 'code' is "commented out", and you can
use every type of """quote""" except three singles.

'''

Or, if you really like the spirit of goto,
use "if 0:".

Reinhold


From gsakkis at rutgers.edu  Mon Apr 25 15:36:44 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 12:36:44 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
Message-ID: <1114457804.600476.324860@o13g2000cwo.googlegroups.com>

"Lonnie Princehouse" wrote:

> I expect you could combine the following with decorators as an easy
way
> to grab a function's locals just before it exits...  you could also
use
> exec or eval to execute code in the function's local namespace.
> ---------------------------------------
>
> # Try it:
>
> def trace_returns(frame, event, arg):
>   if event == 'return':
>     print "[frame locals just before return: %s]" % frame.f_locals
>   return trace_returns
>
> def foo(a, b):
>   return a + b
>
> import sys
> sys.settrace(trace_returns)
>
> foo(1,2)
>

Thanks, that's the closest to what I wanted. A minor point I didn't
quite get from the documentation is how to set a local trace instead of
a global (sys) trace. Also, there's no sys.gettrace() to return the
current tracer; is there a way around this ?

George



From deetsNOSPAM at web.de  Wed Apr  6 17:32:02 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 06 Apr 2005 23:32:02 +0200
Subject: Python sleep doesn't work right in a loop?
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
	<d31g9v$k6j$01$1@news.t-online.com>
	<1112821345.596432.255100@l41g2000cwc.googlegroups.com>
Message-ID: <d31kgc$43u$02$1@news.t-online.com>

ritterhaus at yahoo.com wrote:

> Actually, I've tried ALL of these things, and none of them work. I HAVE
> run the simple for-print-sleep test code to try to determine if this
> issue was specific to wx (that's good troubleshooting, folks - you
> narrow down the problem) and even that didn't work, so I thought I'd
> start with the simple problem first. Sorry if you were mislead.

But it _is_ no problem - the code you gave us works for me and others as
expected - on a very similar system, btw. So there _is_ a difference - do
you call the script from an ide, pipe it or something similar?

And as you yourself found that 4 time.sleep(2) produce 8 seconds timeout in
total, it is pretty obvious that the problem is _not_ time.sleep - but that
whatever effect you want to produce between the calls is not happening. For
the print, we gave you some suggestions.
 
> As for wx, I HAVE used the for-setColour-refresh-update-sleep loop,
> still no dice. The last thing the I put in the loop works (again, as if
> all the changes are being queued) but the sleep just 'takes over' the
> loop and nothing happens until al the sleeps are done. With or without
> wx. Not good.

certainly not good - maybe you should read this

http://fraca7.free.fr/blog/index.php?2005/04/04/10-a-word-about-guis

One quote from the comments:

'''
I am working on a major project, using Python+Twisted. I started using
wxPython for the GUI, then discovered that it was completely unuseable. The
wxWidgets event loop is hidden away, and the only way Twisted can integrate
(the reactor) is to set a timer and run for a few cycles every so often.
The resulting app does not paint properly, has huge lags, and is basically
useless. I rewrote it using PyGtk and the GUI is nice and smooth, thanks to
the flexible event loop design. I am not likely to use wxWidgets again,
I've had many stability problems with it under both Linux and Mac, and the
current stable version doesn't even support the latest Gtk.
 So that's my rant too I guess, agree with all you wrote above.
'''

If you can live without windows compatibility - or wait for qt4 - and the
GPL, I suggest a switch to qt.

Sleep does not "takeover" a loop - there is no semantics defined for that.
Try putting the flushes after the prints, and you'll see things work. What
wx influences are on this  I can't say - but the quote above suggests that
event handling is not as straight in wx as it should be.

-- 
Regards,

Diez B. Roggisch


From bokr at oz.net  Fri Apr  1 04:47:28 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 01 Apr 2005 09:47:28 GMT
Subject: New to programming question
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<0_63e.19914$C7.11056@news-server.bigpond.net.au>
	<B%63e.19916$C7.1024@news-server.bigpond.net.au>
Message-ID: <424d1573.11134991@news.oz.net>

On Fri, 01 Apr 2005 07:46:41 GMT, Joal Heagney <joal at bigpond.net.au> wrote:

>Oh goddammmnitttt. I seem to be doing this a lot today. Look below for 
>the extra addition to the code I posted.
>
>Joal Heagney wrote:
>> 
>> Here's my contribution anycase:
>> 
>> count = 0
>> # Get first input
>> name = raw_input("Guess my name: ")
>> # Give the sucker two extra goes
>> while count < 2:
>>     # Check the value of name
>>     if name == 'Ben':
>>         print "You're right!"
>>         break
>>     else:
>>         name = raw_input("Try again: ")
>	  # Here's the bit I missed out.
>	  count += 1
>> # Of course, we haven't checked the sucker's last guess
>> # so we have to do that now.
>> if count == 2:
>>     if name == 'Ben':
>>         print "You're right!"
>>     else:
>>         print "No more tries for you!!!"
>> 
>> 
>> Hope this helps.
>> Joal
>
>GRRRRRRRR.
>

Need something more straightforward, e.g., a wrapped one-liner:

 >>> def guess(n=3): print ("You're right!", 'No more tries for you!!!')[n-1 in
 ...    (x for x in xrange(n) for t in [raw_input('Guess my name: ')=='Ben']
 ...    if not t or iter([]).next())]
 ...
 >>> guess()
 Guess my name: Jack
 Guess my name: Bob
 Guess my name: Ben
 You're right!
 >>> guess()
 Guess my name: Jack
 Guess my name: Ben
 You're right!
 >>> guess()
 Guess my name: Kermit
 Guess my name: Ms Piggy
 Guess my name: Ernie
 No more tries for you!!!
 >>> guess(1)
 Guess my name: Einstein
 No more tries for you!!!
 >>> guess()
 Guess my name: Ben
 You're right!

Regards,
Bengt Richter


From project5 at redrival.net  Tue Apr 12 02:35:17 2005
From: project5 at redrival.net (Andrei)
Date: Tue, 12 Apr 2005 06:35:17 +0000 (UTC)
Subject: semicolons
References: <425AF6AB.900@mage.hu>
Message-ID: <loom.20050412T082635-689@post.gmane.org>

Mage <mage <at> mage.hu> writes:

> I amafraid of I will stop using semicolons in other languages after one
> or two months of python. However I see that python simply ignores the
> semicolons atd the end of the lines.

I notice that when switching between Python and Delphi I'll sometimes type "if
... then ..." constructs in Python or "if ... :" in Delphi, or define classes
the wrong way, but I get used to the different syntax extremely quickly (I might
make a mistake once or twice, that's it). Same goes for semicolons. 

So I wouldn't worry about it, just write Python in Python, PHP in PHP, C in C,
etc. The semicolons are only a very small part of the differences between
languages and their absence is detected by the compiler when you forget them.

Yours,

Andrei






From martin at v.loewis.de  Sat Apr  9 07:53:18 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 09 Apr 2005 13:53:18 +0200
Subject: Python extension performance
In-Reply-To: <WqydncT1Hq80p8rfRVn-2w@adelphia.com>
References: <WqydncT1Hq80p8rfRVn-2w@adelphia.com>
Message-ID: <4257C22E.80205@v.loewis.de>

David Jones wrote:
> Both the C++ executable and python module were linked from the same
> object files, and linked with the same options.  The only difference is
> that the Python module is linked with -shared, and the C++ code is not.
[...]
> Some potential causes of my problems:
> 
> - linking to a shared library instead building a static exe.

That is unlikely the problem - the shared library should long be loaded
when you call the function.

> - intel libraries are not being used when I think they are

Very much possible. I would do an strace on each binary (python and
your stand-alone application) to see what libraries are picked up.

> - libpython.so was built with gcc, so I am getting some link issues

Unlikely.

> - can linking to python affect my memory allocation and deallocation in
> c++??

It can - Python grabs a 128k at startup, and then another one if the
first one is exhausted. But that should not cause a performance
difference.

Other possible explanations:
- The intel compiler somehow arranges to use multiple processors in the
  code (e.g. through OpenMP); for some reason, your multiple processor
  are not used when this is run in the Python interpreter (and no,
  the GIL would not be an immediate explanation)
- The Python interpreter (unknowingly) switches the processor to a
  different floating-point operation mode, one which is less efficient
  (but, say, more correct).

Regards,
Martin


From reinhold-birkenfeld-nospam at wolke7.net  Fri Apr 22 09:46:11 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Fri, 22 Apr 2005 15:46:11 +0200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <3csdegF6p6jpnU1@individual.net>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
	<3cr2caF6locm6U1@individual.net>
	<roy-41B7B8.22172521042005@reader1.panix.com>
	<3csdegF6p6jpnU1@individual.net>
Message-ID: <3csdl0F6p6jpnU2@individual.net>

Reinhold Birkenfeld wrote:

> Other possibility, probably faster when almost all keys in the range are in
> the dictionary:
> 
> class sdict(dict):
>     def __getitem__(self, index):
>         if isinstance(index, slice):
>             d = {}
>             for key in xrange(slice.start, slice.stop, slice.step):

Hm. I wonder whether (x)range could be made accepting a slice as single argument...

Reinhold


From modelnine at ceosg.de  Sat Apr  2 18:00:26 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sun, 3 Apr 2005 01:00:26 +0200
Subject: Simple thread-safe counter?
In-Reply-To: <200504030057.56239.modelnine@ceosg.de>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<7xmzsg3ov6.fsf@ruckus.brouhaha.com>
	<200504030057.56239.modelnine@ceosg.de>
Message-ID: <200504030100.29480.modelnine@ceosg.de>

Am Sonntag, 3. April 2005 00:57 schrieb Heiko Wundram:
> <snip>
> or

Make that:

create_counter = syncronized_iterator(itertools.count)

and

counter = create_counter()

to create the actual counter regardless of iterator.

-- 
--- Heiko.
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From rbt at athop1.ath.vt.edu  Fri Apr  8 10:47:06 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Fri, 08 Apr 2005 10:47:06 -0400
Subject: Interpreter problem
In-Reply-To: <mailman.1538.1112970334.1799.python-list@python.org>
References: <425684F8.5060507@novasyshealth.com>
	<mailman.1538.1112970334.1799.python-list@python.org>
Message-ID: <d365ha$h33$1@solaris.cc.vt.edu>

Steve Holden wrote:
> Greg Lindstrom wrote:
> 
>> I am using python 2.3.5 on a Linux system and have an odd problem 
>> dealing with the 'sha-bang' line.  I have a file, driver.py which 
>> starts with
>>
>> #!/usr/bin/python
>>
>> and works fine (that is, when I type in ./driver.py at the command 
>> prompt the file runs as expected).  I have another file, 
>> myotherfile.py which starts with the exact same line 
>> (#!/usr/bin/python) but I get
>>
>> : bad interpreter: No such file or directory
>>
> There's almost certainly a carriage return as well as a newline in the 
> shebang line.
> 
> [...]
> 
> regards
>  Steve

Not so. I get the same result with python 2.3 and 2.4 on Debian Linux 
Testing. Nothing odd at all in the shebang.


From Scott.Daniels at Acm.Org  Wed Apr  6 15:58:51 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 06 Apr 2005 12:58:51 -0700
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <mailman.1451.1112814512.1799.python-list@python.org>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>	<mailman.1412.1112744591.1799.python-list@python.org>	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>	<425394bd.436936831@news.oz.net>	<9rv7515o3o7fomvs5mlhnqrprb72n9arck@4ax.com>
	<mailman.1451.1112814512.1799.python-list@python.org>
Message-ID: <42543a2a$1@nntp0.pdx.net>

Guess I am listening to language funny today.

Steve Holden wrote:
> By the way, we pass *parameters* to functions, *perimeters* surround 
> things.
But we do pass parameters *around*, which may be the source of the
confusion. :-)

-Scott David Daniels
Scott.Daniels at Acm.Org


From brian at brianandkate.com  Tue Apr  5 18:01:54 2005
From: brian at brianandkate.com (Brian Blazer)
Date: Tue, 05 Apr 2005 22:01:54 GMT
Subject: playing with pyGoogle - strange codec error
References: <xc-dne0eN-WpQs_fRVn-oQ@speakeasy.net>
Message-ID: <2005040517015316807%brian@brianandkatecom>

On 2005-04-05 13:55:48 -0500, Erik Max Francis <max at alcyone.com> said:
<snip>

Thank you, that worked.

Brian

-- 
Nail a post to the Spalted Board. Free WW'ing software and forums.  
Regular freebies! http://www.spaltedboard.com



From simon.brunning at gmail.com  Thu Apr 21 11:34:25 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 21 Apr 2005 16:34:25 +0100
Subject: recording data between [ and ]
In-Reply-To: <d48cpb$hij$1@solaris.cc.vt.edu>
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca> <d48cpb$hij$1@solaris.cc.vt.edu>
Message-ID: <8c7f10c60504210834f2c7782@mail.gmail.com>

On 4/21/05, rbt <rbt at athop1.ath.vt.edu> wrote:
> string.between(data,[,])

def between(data, start, end):
    return re.findall(re.escape(start) + r'([^]]*)'+ re.escape(end), data)
    
foo = '''stuff   [lsass.exe]
[System]  more stuff
xxxxx [firefox.exe] ......
'''

print between(foo, '[', ']')

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From martin at v.loewis.de  Tue Apr 19 14:45:02 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 19 Apr 2005 20:45:02 +0200
Subject: gc.DEBUG_LEAK and gc.garbage
In-Reply-To: <d8768f2d.0504190928.35411d46@posting.google.com>
References: <d8768f2d.0504190928.35411d46@posting.google.com>
Message-ID: <426551af$0$29157$9b622d9e@news.freenet.de>

Cesar wrote:
> I have set the DEBUG_LEAK flag with the GC and in the program cycle
> printed the length of the garbage list. Is this enough to determine if
> there is a leak in the python code? (the value rises). 

Well, define "a leak". It could mean a number of things:

- an object that is not used anymore, but still referenced
  from a "live" object.
  This will not be released until the reference from the live
  object is broken.
- an object that is not referenced "from the outside", but
  still referenced from a cycle. It will not be released immediately,
  but will be released eventually when the cyclic GC runs.
- an object that is part of a cycle, but not even released by
  the cyclic GC.
- an object that is never released because its reference counter
  is wrong.

Except for the last category, none of these are "true" leaks,
since you could always arrange to release them eventually through
explicit Python code.

> I played with other flags as DEBUG_SAVEALL, but I think they are not
> useful for what I want.

DEBUG_LEAK includes DEBUG_SAVEALL; all objects in cycles are not
released, but added to gc.garbage. This is to detect whether
you have objects that are not released even when they become
unreachable, but only when the GC runs. Some people consider
this a leak, and DEBUG_LEAK helps you to find such objects
(so you can break the cycles explicitly).

If you want to know whether you have objects that participate
in cycles and are not released by the cyclic GC, then don't
set any flags, and just look at gc.garbage.

> Finally, in this group I have seen a reference to an article in which
> they had the look to gc.garbage after calling explicitally to
> gc.collect(). is this necessary?

Necessary to do what? If you want to verify that all unreferenced
objects are collectable, you should check gc.garbage after invoking
gc.collect().

Regards,
Martin


From nyamatongwe+gravity at gmail.com  Fri Apr 15 07:07:46 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Fri, 15 Apr 2005 11:07:46 GMT
Subject: Using python from a browser/security hole
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
Message-ID: <MPG.1cca20626fa9aeca98968a@news-server>

Philippe:

> Since I need to access a local/client device from the page and 
> that I wish to be cross-platform; does that mean Java is my only 
> way out ?

   Java is designed to be safe and not allow access to client devices. 
There is a mechanism where you can attempt to ask for permission from 
Java but it looked complex to me and I doubt many browsers will 
cooperate. They have often locked security down to prevent this sort of 
access.

   Neil


From mage at mage.hu  Fri Apr 22 13:35:41 2005
From: mage at mage.hu (Mage)
Date: Fri, 22 Apr 2005 19:35:41 +0200
Subject: gui developing
Message-ID: <426935ED.90708@mage.hu>

          Hello,


I am flirting with the idea of developing a gui app in python as a
newbie. Which module should I use?
I have noticed that wxpython is already installed on my gentoo and the
examples on their wiki looks easy. Is it okay or should I use wax or
something else?

       Mage




From mefjr75 at hotmail.com  Sun Apr 17 21:57:34 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 17 Apr 2005 18:57:34 -0700
Subject: Finding name of running script
References: <1113778866.595981.186480@f14g2000cwb.googlegroups.com>
	<1113783390.440857.302680@l41g2000cwc.googlegroups.com>
	<1113787226.002190.265140@g14g2000cwa.googlegroups.com>
Message-ID: <1113789454.494468.52130@l41g2000cwc.googlegroups.com>

runes wrote:
> Thanks!
>
> That's os.path.basename() I guess. It's better, but still complex.

Yea murphy's typo ;)

> I have a
> _nof_ = argv[0].split(sep)[-1]  in my script template and use it
under
> the usage() function to tell what the script does, like:
> "cf.py counts files in directory or directory structure"
>
> If I change the filename, I want it to be automatically reflected
when
> running the script. That's the motivation.

Generally I do it the very same way just spell it different.
os.path.basename(sys.argv[0])

> I have the feeling that I came a cross some very simple way to
extract
> the filename, but I can't find my mental note ;-)
Maybe you found some black magic ;)
M.E.Farmer



From timr at probo.com  Sun Apr 17 01:05:07 2005
From: timr at probo.com (Tim Roberts)
Date: Sat, 16 Apr 2005 22:05:07 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1864.1113438657.1799.python-list@python.org>
Message-ID: <thr361h5pk9km1lsmhakhq7stdi601o0ei@4ax.com>

Dick Moores <rdm at rcblue.com> wrote:
>>
>># Reading/writing Python source often gives me the impression of
>># reading/writing a poem!
>># Layout, indentation, rythm, I like the look and feel!
>>
>># What does this tiny program do? It is not a sonnet, even not a
>># pi-sonnet, but it surely produces Pi!
>
>It sure does. When I ran it my jaw dropped. I had 7,947 CORRECT digits in 
>2 minutes 0 seconds (by my stopwatch)!

How do you know?  I think the 7,912th digit is wrong.

;)
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From nyamatongwe+gravity at gmail.com  Fri Apr 15 20:32:23 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Sat, 16 Apr 2005 00:32:23 GMT
Subject: Dr Dobbs "with" keyword
Message-ID: <MPG.1ccb07fd51e023b098968c@news-server>

   In the March 2005 issue of Dr Dobbs Journal there is an article 
"Resource Management in Python" by Oliver Schoenborn. One paragraph 
(first new paragraph, page 56) starts "Starting with Python 2.4, a new 
type of expression lets you use the keyword /with/". It continues, 
mentioning PEP 310 (Reliable Acquisition/Release Pairs) which is at 
"Draft" status and unlikely to be accepted with the keyword "with" as 
Guido wants to use that for another purpose. The discussion of cyclic 
garbage also troubles me but is not an area in which I have much 
experience.

   While publishing a correction in a future issue would not be very 
helpful, adding a correction to online and CD-ROM versions would be. If 
anyone understands the technical review process at DDJ, could they give 
them a little prod.

   Neil


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 08:10:25 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 13:10:25 +0100
Subject: terminate exectutioin in PythonWin
Message-ID: <d3j265$ne6$1@scotsman.ed.ac.uk>

Hi all

1.Could someone tell me how to terminate execution in PythonWin?

2.Can anyone recommend a free development environment in which you can 
save your workspace (e.g. open files, debugging breakpoints etc.)

Jim


From dan at dontspammecauseidontlikit.com  Fri Apr  8 02:18:24 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Fri, 08 Apr 2005 14:18:24 +0800
Subject: Sockets
References: <36qb5199613lai084brifj8judpoummv6n@4ax.com>
	<115bt9ubqdpvi49@corp.supernews.com>
Message-ID: <gf8c51pu68k7ag4d6h06b5cibjdr3pjncf@4ax.com>

On Fri, 08 Apr 2005 03:06:38 -0000, Grant Edwards <grante at visi.com>
wrote:


>Nope. You're thinking of C strings. Python strings aren't
>terminated with a null. 

Yes, that make sense.  Thanks for the input, and the note on struct.

Dan



From just at xs4all.nl  Fri Apr 22 04:27:29 2005
From: just at xs4all.nl (Just)
Date: Fri, 22 Apr 2005 10:27:29 +0200
Subject: deprecation of has_key?
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>
	<426775C8.3000303@holdenweb.com>
	<mailman.2224.1114094137.1799.python-list@python.org>
	<TIKdnV6iPosyIPrfRVn-2w@comcast.com>
	<mailman.2254.1114121746.1799.python-list@python.org>
Message-ID: <just-36665B.10272922042005@news1.news.xs4all.nl>

In article <mailman.2254.1114121746.1799.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Steven Bethard" <steven.bethard at gmail.com> wrote in message 
> news:dfWdnZdcUZbqX_rfRVn-vw at comcast.com...
> > Ahh, ok.  Now I understand.  I think you could probably search the 
> > python-dev archives and see why the decision was made as it was.  For 
> > pretty much all my purposes, "key in dict" is much more useful than "item 
> > in dict".  Practicality beats Purity and all. ;)
> 
> In '[for] x in mydict:', x could potentially be key, value, or item-pair. 
> All three were considered and discussed -- I believe on clp-- and key 
> chosen as the most useful.  A specific analogy brought forth was the phone 
> book, a mapping of names to phone number and maybe address.  The decision 
> was definite closer to a coin-toss to a no-brainer.

The main argument was that nothing but "key in d" made sense (for 
__contains__), and that therefore "for key in d" was the only option, 
for symmetry with the other "in".

Just


From fredrik at pythonware.com  Tue Apr 12 06:59:50 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 12:59:50 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz><mailman.1724.1113261387.1799.python-list@python.org><1113264839.497914.210170@z14g2000cwz.googlegroups.com>	<425b8cf7$0$38043$bed64819@news.gradwell.net><mailman.1741.1113298741.1799.python-list@python.org>
	<425ba44e$0$38038$bed64819@news.gradwell.net>
Message-ID: <d3g9he$smm$1@sea.gmane.org>

Michael Kearns wrote:

> As for consulting a lawyer, this is exactly what I'm trying to avoid. My usage of python in a 
> commercial sense is as a small utility - a helper, if you will. It has no business value 
> whatsoever, compared to the product that it ships with, and certainly does not warrant any 
> investment regarding legal advice.

without consulting a lawyer, how come you're so sure that the MS C support
library is the only component you're using that may cause you legal problems?

> Unfortunately, the Microsoft Redistribution document, from what I read, does not allow an end-user 
> to further redistribute the library.

the REDIST document doesn't say anything like that, and neither does the
EULA (at least not the copies I have in my properly licensed VS Enterprise
installation).

all it says is that when the Python developers ("you" in the EULA) redistributes
the redistributable component as part of a Python distribution (the "licensee soft-
ware" in the EULA), the developers must respect the original EULA wrt. this
component.  And when someone using Python is redistributing Python, that third
part ("your distributors" in the EULA) must also respect the original EULA wrt.
this component.

(see section 3.1a in the EULA, and make sure you understand what the words
"you", "licensee software", "redistributables" and "distributors" mean in that text)

</F> 





From tjreedy at udel.edu  Thu Apr 21 18:47:19 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 18:47:19 -0400
Subject: Strings
References: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
Message-ID: <d49a96$bmf$1@sea.gmane.org>


"Dan" <dan at dontspammecauseidontlikit.com> wrote in message 
news:5s9f61t9o5iv2qa5vccq3757djq0e0usor at 4ax.com...
> I've having trouble coming to grip with Python strings.
>
> I need to send binary data over a socket.  I'm taking the data from a
> database.  When I extract it, non-printable characters come out as a
> backslash followed by a three numeric characters representing the
> numeric value of the data.

Are you sure that the printable expansion is actually in the string itself, 
and not just occurring when you 'look' at the string by printing it -- as 
in...

>>> s='1\001b'
>>> s
'1\x01b'
>>> len(s)
3
?
>  I guess this is what you would call a raw Python string.

No such thing.  There are only strings (and unicode strings).  'raw' only 
applies to a mode of interpreting string literals in the process of turning 
them into bytes or unicode.

Terry J. Reedy





From peter at engcorp.com  Fri Apr  1 16:22:43 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 01 Apr 2005 16:22:43 -0500
Subject: redundant importr
In-Reply-To: <Qkh3e.1153576$35.42709917@news4.tin.it>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<3avnh3F6cekgkU1@individual.net>
	<fZU2e.718439$b5.32462435@news3.tin.it>
	<juudnZEu35NXvNHfRVn-jg@powergate.ca>
	<Qkh3e.1153576$35.42709917@news4.tin.it>
Message-ID: <1MudnZ0j7M-bIdDfRVn-sA@powergate.ca>

max(01)* wrote:
> Peter Hansen wrote:
>> Not required except for performance reasons.  If the .pyc
>> files don't exist, the .py files are recompiled and the
>> resulting bytecode is simply held in memory and not cached
>> and the next startup will recompile all over again.
> 
> but the other files *are* compiled, right? 

Yes, definitely.  I did say that.

> so the initial question remains unanswered: 

No it doesn't.  I thought I was clear, but I can reword
it for you: the files are compiled *in-memory* and the
results are never written to disk.

 > *if* they are compiled, where are they put, if the
> corresponding *.py files are on a non-writeable directory?

They are not put anywhere.  Compilation is a process
by which the source is converted to executable bytecodes.
This says nothing about where either the source or the
compiled result resides.  The actual compilation works
on a long series of bytes in memory, and the result is
just another long series of bytes.  Nothing requires that
either of these things are even stored in a file.

Not sure what else I could say to make it clearer...

(I'm not misunderstanding you am I?  I get the feeling
we're not quite on the same page here.)
-Peter


From cam.ac.uk at mh391.invalid  Sun Apr 24 06:46:28 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sun, 24 Apr 2005 11:46:28 +0100
Subject: rudeness    was:  Python licence again
In-Reply-To: <mailman.2308.1114200498.1799.python-list@python.org>
References: <mailman.2308.1114200498.1799.python-list@python.org>
Message-ID: <d4fte8$sa1$1@gemini.csx.cam.ac.uk>

Michael.Coll-Barth at VerizonWireless.com wrote:

> I started to read the postings on this list and was dismayed
 > at the depth of rudeness on here.

I saw no evidence of rudeness whatsoever. Well, with the possible 
exception of some posters calling others names like "rude."
-- 
Michael Hoffman


From nid_oizo at yahoo.com_removethe_  Sun Apr  3 03:04:25 2005
From: nid_oizo at yahoo.com_removethe_ (Nicolas Fleury)
Date: Sun, 03 Apr 2005 03:04:25 -0400
Subject: threading.Event file descriptor
Message-ID: <zxM3e.55834$rl.2020212@weber.videotron.net>

Hi,
Is there any way to get the file descriptor on Unix or handle on Windows 
associated internally with a threading.Event object?  So that it can be 
used in a call to select or WaitForMultipleObjects.
Thx and regards,
Nicolas


From programmer.py at gmail.com  Mon Apr 18 14:45:14 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Mon, 18 Apr 2005 13:45:14 -0500
Subject: packages
In-Reply-To: <4263FC93.5090104@mage.hu>
References: <4263FC93.5090104@mage.hu>
Message-ID: <d52c72d2050418114546e8b942@mail.gmail.com>

A package is a collection of related modules.  The modules are
'collected' in a directory that contains a special __init__.py script.

Put this directory some where in your PYTHONPATH and you can do stuff like ->
from mypackage.mymodule import MyObject

The tutorial uses a sound package as its example.  The idea being that
the Sound package contains sub packages.  For instance the
sound.effects package represents some specific sound effect such as:
`echo', 'surround', 'reverse'.

This means that you have a directory structure like (stripped from the
tutorial) ->

Sound/                          Top-level package
      __init__.py               Initialize the sound package
      Effects/                  Subpackage for sound effects
              __init__.py
              echo.py
              surround.py
              reverse.py

What I *dont* like about the example is the PascalStyleCasing used for
the package names.  Is their not some *suggested* standard on naming
conventions?  This is one of my few gripes about python!  The
libraries seem to be written without regards to a consistent naming
standard.  Some modules, such as the logging module use camelCasing
while others such as the string module use lowercaseruntogether
methods.

I hope that python 3000 addresses this!  Me, I've just gotten used to
RTFM'n.  Doh!  Tangent!  Anyway...

Another example of packages that I use is for building my GUI. 
Because I don't have many `screens', I break things up into packages
like this:

myapp.panels (contains all of the `panels' i use)
myapp.dialogs (contains all of the dialogs i use)
myapp.database (contains database related modules)

Which allows me to do something like this in my app ->

from myapp.panels.firsttimepanel import FirstTimePanel

Get it?
jw

On 4/18/05, Mage <mage at mage.hu> wrote:
>        Hello,
> 
> I read about modules and packages in the tutorial. I think I understand
> how to use packages and modules, even I know how to create a module (as
> far I understand it's a simple .py) file , but I don't know how can I
> create a package and when should I do it.
> 
> Where should I look for more information?
> 
>        Mage
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From Mccormick.Johnw at epamail.epa.gov  Mon Apr 11 12:08:06 2005
From: Mccormick.Johnw at epamail.epa.gov (Mccormick.Johnw at epamail.epa.gov)
Date: Mon, 11 Apr 2005 12:08:06 -0400
Subject: Sockets (jepler@unpythonic.net)
Message-ID: <OF02D0CA50.5B9D577E-ON85256FE0.005870B8-85256FE0.0058A1D1@epamail.epa.gov>




Hello, ... I am John McCormick (Systems Programmer ) and I am currently
working on a python program which will connect (user) specified inputs
and connect them to (user) selected outputs (like screen or
video/audio-recording devices) and would like to know if there's a
technique to "test" or "sense" if the desired output device is busy
without interrupting the output device while checking to see if it's
busy... ?? If, perhaps, python does not have this type of feature, I
wonder if you could give me some type of direction (ie., manufacturer's
device response checking techniques that could be used in conjunction
with python) but the bottom line is not to "crash" or interrupt the
desired output device (if it's still busy)...

Thank You



John McCormick



##############################################
John W. McCormick, Systems Programmer / DBA
High Performance Computing & Scientific Visualization
Lockheed Martin Information Technology, Supporting the EPA
Research Triangle Park, NC
919-541-0890

Federal Infrastructure Contact - Ravi Nair
919-541-5467    -  nair.ravi at epa.gov
Federal Infrastructure Contact - Joe Retzer, Ph.D.
919-541-4190    -  retzer.joseph at epa.gov



From mail at peterbe.com  Mon Apr 25 07:07:26 2005
From: mail at peterbe.com (Peter Bengtsson)
Date: Mon, 25 Apr 2005 11:07:26 +0000 (UTC)
Subject: Squezing in replacements into strings
Message-ID: <loom.20050425T124656-179@post.gmane.org>

I've got a regular expression that finds certain words from a longer string.
>From "Peter Bengtsson PETER, or PeTeR" it finds: 'Peter','PETER','PeTeR'.

What I then want to do is something like this:

 def _ok(matchobject):
     # more complicated stuff happens here
     return 1

 def _massage(word):
     return "_" + word + "_"

 for match in regex.finditer(text):
    if not _ok(match):
        continue
    text = text[:match.start()] +\
           _massageMatch(text[match.start():match.end()]) +\
           text[match.end():]

This code works and can convert something like "don't allow the fuck swear word"

to "don't allow the _fuck_ swear word".

The problem is when there are more than one matches. The match.start() and

match.end() are for the original string but after the first iteration in the

loop the original string changes (it gains 2 characters in length due to the
 "_"'s)

How can I do this this concatenation correctly? 



--
Peter Bengtsson,
work www.fry-it.com
home www.peterbe.com
hobby www.issuetrackerproduct.com



From martin at v.loewis.de  Wed Apr 13 17:21:07 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 13 Apr 2005 23:21:07 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <hu6dnY8pjImpi8DfRVn-1g@powergate.ca>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<20050411194907.1769.17472.XPN@orion.homeinvalid>
	<425AF2FD.2080006@v.loewis.de>
	<20050412191956.1706.59231.XPN@orion.homeinvalid>
	<d9GdnYjHStB30MHfRVn-pg@powergate.ca>
	<hu6dnY8pjImpi8DfRVn-1g@powergate.ca>
Message-ID: <425d8d43$0$10546$9b622d9e@news.freenet.de>

Peter Hansen wrote:
>> The last I recall reading in this forum was that the regular
>> distribution is compiled with a copy of the compiler
>> *provided by* Microsoft.
[...]
> By 'provided by' I meant *donated by*, as in given
> free (apparently) to the PSF or at least to one of
> the core developers for the purpose of compiling
> Python itself.

Just for the record: While I do have received such a copy,
this copy isn't actually used to build the binaries. Instead,
I use a copy of the compiler that my employer has licensed
(not that this matters much).

I cannot personally see much difference between using VC6
or VC7.1. One key reason for me to push the change for VC7.1
is that VC7.1 has updated SDK headers, which in turn means
that Python 2.4 supports IPv6 (which wasn't really possible
with VC6). Also, many people who build Python extensions
cannot get a copy of VC6 anymore (because MS stopped selling
it), so if Python was built with VC6, many people could
not build Python extensions.

I cannot see much of a difference because Python would have
to include the CRT in *either* case - whether it is mscvrt4.dll,
or msvc71.dll. Neither of these DLLs is guaranteeed to be
shipped with the operating system; that people got away with
not distributing mscvrt4.dll is only because so much other
software distributes it that it is available on virtually
every system. I predict the same will happen with mscvr71.dll
over time (and then with the CRT that will be shipped with
the next release of VC).

Regards,
Martin


From radam2 at tampabay.rr.com  Sat Apr  2 21:57:08 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 02:57:08 GMT
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
	<1112466233.403989.125810@l41g2000cwc.googlegroups.com>
Message-ID: <b8lu411dfphm8lbc6tc5anpq9m2tn3qlef@4ax.com>

On 2 Apr 2005 10:23:53 -0800, "George Sakkis" <gsakkis at rutgers.edu>
wrote:

>It turns out it's not a "how to inflate tires with a hammer" request;
>I've actually written an optional type checking module using
>decorators. The implementation details are not easy to grok, but the
>usage is straightforward:
>
>from typecheck import *
>@returns(listOf(int, size=3))
>@expects(x=str, y=containerOf(int))
>def foo(x,y):
>    return [len(x)] + list(y)
>

Hi George,

I wrote one like that too yesterday once I figured out how to pass the
arguments, except not with 'conainerof' emplemented. That's a nice
touch.

>>@define((int, int, float), (int, list))
>>def somefunction( a_int, b_int, c_float):
	# some stuff
	return an_int, an_list

It checks both the inputs and returns for types and number of items.
And gives error appropriate for both. 

Next, would be to surround the 'def define' statements with an
"if __debug__: " statement so it can be turned off for the final
version.  I wonder if a decorator, that just passes values straight
though, gets optimized out or not?  Or if there's another way to turn
of a decorator?

I also have a test_type function that can be put inline that tries to
adapt the value before it gives an error.

These are interesting problems to solve and go into my tool box,
although I don't have a need for them at the moment. :)

Cheers,
Ron



From bokr at oz.net  Thu Apr 14 01:50:00 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 14 Apr 2005 05:50:00 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
	<16gr511c2ckc5q4crj5o0tfloicfpne4mt@4ax.com>
Message-ID: <425e01bc.338436265@news.oz.net>

On Thu, 14 Apr 2005 11:05:17 +1000, John Machin <sjmachin at lexicon.net> wrote:

>On Wed, 13 Apr 2005 08:28:29 -0400, Roy Smith <roy at panix.com> wrote:
>
>>In article <1113390479.738210.49530 at z14g2000cwz.googlegroups.com>,
>> "Dan Bishop" <danb_83 at yahoo.com> wrote:
>>
>>> But there's no reason other than tradition why you should arrange them
>>> into groups of 10.
>>
>>Well, it is traditional for people to have 10 fingers :-)
>
>According to anthropology archives, there was once a tribe called
>"OS/360 system programmers" who would cut off their thumbs and great
>toes in order that they might better count in hexadecimal.
>
I suspect using four dates back to the nixie tribe, who practiced bi-quinary.
And they would cut off little toes and fingers rather, because then the thumb
was more significant and it was easier to remember it as 5 (or 0 if hidden)
with the rest counting octally ;-)

Regards,
Bengt Richter


From mwm at mired.org  Sun Apr 24 03:23:21 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 24 Apr 2005 02:23:21 -0500
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net>
	<mailman.2379.1114319143.1799.python-list@python.org>
Message-ID: <86ll78r63a.fsf@guru.mired.org>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:
> In any event, he would likely (passionately)
> disagree considering his notion that programming is an off-shoot of
> math and thus at the fundamental level has identical concepts and
> rules.

My formal training is as a mathematician, but my profession is
programmer.

He's right - programming is an offshoot of mathematics. It adds
*dynamics* to the structures of mathematics. In mathematics, a
construct (graph, function, mapping, set, whatever) is immutable. You
can talk about things that change with time, but you do so with a
function f(t) that describes the changes to the thing over time - and
*that* function is immutable. You can say that it isn't time that's
changing, but frobnitz, with the same function describing the change -
and you get the same structures that you got with time.

This change causes a fundamental change in the way practitioners
*look* at objects. Which is visible as a change in the
vocabulary. Yes, you can talk about programming with the vocabulary of
mathematics. But that's like dancing about architecture (*).

             <mike

Original quote "Talking about music is like dancing about
architecture." - attributed to Elvis Costello


-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From dalke at dalkescientific.com  Tue Apr  5 01:57:30 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Tue, 05 Apr 2005 05:57:30 GMT
Subject: How to merge two binary files into one?
References: <mailman.1340.1112663541.1799.python-list@python.org>
	<1153pu8pvom6b02@corp.supernews.com>
	<mailman.1344.1112666821.1799.python-list@python.org>
	<1153vfhid1vfif1@corp.supernews.com>
Message-ID: <pan.2005.04.05.05.58.12.668596@dalkescientific.com>

Grant Edwards wrote:
> For large files, something like this is probably a better idea:

Or with the little-used shutil module, and keeping your
nomenclature and block size of 65536

import shutil
fout = file('C', 'wb')
for n in ['A', 'B']:
  fin = file(n, 'rb')
  shutil.copyfileobj(fin, fout, 65536)
  fin.close()
fout.close()


				Andrew
				dalke at dalkescientific.com



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From: justin at mobileforlife.com (Justin Harrison)
Date: Thu, 14 Apr 2005 12:25:21 +0100
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From eldiener_no_spam_here at earthlink.net  Tue Apr  5 17:21:37 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Tue, 05 Apr 2005 21:21:37 GMT
Subject: Installing Python 2.4 on Linux
Message-ID: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>

I can install Python 2.4 on the Fedora 3 Linux system, but after I do a 
number of Linux utilities and commands, like yum, stop working because 
they were dependent on the Python 2.3 installation. What happens is that 
Python 2.4 replaces the /usr/bin/python module with the Python 2.4 
version. If I replace /usr/bin/python with the Python 2.3 version 
executable, which is still on my system, that all the aforesaid modules 
depend on, they start working again, but I can no longer execute 
modules, like IDLE, which was part of my Python 2.4 distribution.

What is the solution to this ? The operating system was installed with 
Python 2.3 and the development libraries but no tools, doc, or 
otherwise. I have installed Python 2.4 with all the RPMs and copied down 
the Python 2.4 documentation to my machine ( since python24-docs.rpm 
gives one very little ). I would naturally like to use Python 2.4 
without killing all the commands that depend on Python 2.3. No doubt 
these commands have their modules in the site libraries for Python 2.3. 
Of course I would love to update these dependencies to use Python 2.4 
but newer RPMs for these commands do not exist.

I do not know whether this is a Python problem or a Fedora 3 problem but 
I thought I would ask here first and see if anybody else had the same 
problem. I imagine the problem might exist on other Linux systems.


From xah at xahlee.org  Sat Apr  9 04:06:50 2005
From: xah at xahlee.org (Xah Lee)
Date: 9 Apr 2005 01:06:50 -0700
Subject: EOL created by .write or .encode
In-Reply-To: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>
References: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>
Message-ID: <1113034010.742291.94360@o13g2000cwo.googlegroups.com>

I found the problem now. (after some  one hour debug time) Python
didn't have problem. Emacs does.

If you open a file in emacs, it will open fine regardless whether the
EOL is ascii 10 or 13. (unix or mac) This is a nice feature. However,
the what-cursor-position which is used to show cursor position and the
char's ascii code, says the EOL is ascii 10 when it is in fact ascii
13. Fuck the irresponsible fuckhead who is responsible for this.

http://xahlee.org/UnixResource_dir/writ/responsible_license.html

 Xah
 xah at xahlee.org
? http://xahlee.org/



Xah Lee wrote:
> Why is that some of my files written out by
>    outF.write(outtext.encode('utf-8'))
> has ascii 10 as EOL, while others has ascii 13 as EOL?
> both of these files's EOL are originally all ascii 10.
>
> If i remove the EOL after the tt below in the place string, then this
> doesn't happen.
>
> findreplace = [
> (ur'</body>',
> ur'''tt
> </body>'''),
> ]
>
> ...
>
>    inF = open(filePath,'rb')
>    s=unicode(inF.read(),'utf-8')
>    inF.close()
>
>    for couple in findreplace:
>        outtext=s.replace(couple[0],couple[1])
>        s=outtext
>    outF = open(tempName,'wb')
>    outF.write(outtext.encode('utf-8'))
>    outF.close()
>
> thanks.
>
>  Xah
>  xah at xahlee.org
> ? http://xahlee.org/PageTwo_dir/more.html ?



From finite.automaton at gmail.com  Fri Apr 29 13:42:49 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 29 Apr 2005 10:42:49 -0700
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
	<1114710873.292998.128090@f14g2000cwb.googlegroups.com>
	<1114714105.582253.12150@f14g2000cwb.googlegroups.com>
	<uIydnXD17Z2c2-zfRVn-2A@comcast.com>
	<1114724023.743271.275710@g14g2000cwa.googlegroups.com>
	<S8qdneMehej_CezfRVn-rg@comcast.com>
Message-ID: <1114796569.028242.45700@o13g2000cwo.googlegroups.com>

key and cmp are equivalent for non-trivial cases (defined below), and
for trivial cases the performance will be a trade-off between more
function calls with cmp versus more memory use with key.  Granted, for
the smallish lists that the majority of Python sorts are done on, key
is probably the better choice.

Non-trivial:
  Any time the user decides to (1) cache intermediary results for a cmp
function or (2) define a __cmp__ function for the key return value.
These arise when comparison of partial keys is often sufficient to
establish order between two objects.



From andrea_gavana at tin.it  Tue Apr  5 15:44:09 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Tue, 5 Apr 2005 21:44:09 +0200
Subject: Add System Path?!?
Message-ID: <4200063400021F50@ims9c.cp.tin.it>

Hello NG,

    I have a GUI (written in wxPython) that calls some external exe files.
Some of them requires that I add to the PATH variable 1 directory. Basically,
the exe are located in:

/MyApp/Solvers/FirstExe
/MyApp/Solvers/SecondExe

And so on, while the dll needed by these exe are located in:

/MyApp/MyDll

These exe files do not work if I don't set the PATH variable also to that
adress. I know I can do it by hand (and also my users can), but I wonder
if there is a way to do it in Python...

Thank you for all suggestions/pointers.

Andrea.




From qwweeeit at yahoo.it  Wed Apr 13 17:39:13 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 13 Apr 2005 14:39:13 -0700
Subject: Removing comments... tokenize error
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
Message-ID: <2ab23d7a.0504131339.1c0088b@posting.google.com>

My code, besides beeing cumbersome and criptic, has another quality:
it is
buggy!
I apologize for that; obviously I discovered it after posting (in the
best tradition of Murphy's law!).
When I will find the solution I let you know, also if the problem is
made difficult for the fact that the for cycle is indexed in terms of
a 5 element tuple, not very easy (at least for me!...).


From g.brandl at gmx.net  Sun Apr  3 17:05:07 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Sun, 03 Apr 2005 23:05:07 +0200
Subject: "specialdict" module
In-Reply-To: <mailman.1264.1112560102.1799.python-list@python.org>
References: <3bamhhF6j009lU1@individual.net>
	<mailman.1264.1112560102.1799.python-list@python.org>
Message-ID: <3bb433F6fn6t3U1@individual.net>

Michael Spencer wrote:

> 1. Given that these are specializations, why not have:
> 
> class defaultvaluedict(dict):
>      ...
> 
> class defaultfactorydict(dict):
>      ...
> 
> rather than having to jump through hoops to make one implementation satisfy both 
> cases

I think I like Jeff's approach more (defaultvalues are just special
cases of default factories); there aren't many "hoops" required.
Apart from that, the names just get longer ;)

> 2. I would really prefer to have the default value specified in the constructor
> 
> I realize that this is tricky due to the kw arguments of dict.__init__, but I 
> would favor either breaking compatibility with that interface, or adopting some 
> workaround to make something like d= defaultvaluedict(__default__ = 0) possible.

Too much specialcased for my liking.

> One worksaround would be to store the default in the dict, not as an attribute 
> of the dict.  By default the default value would be associated with the key 
> "__default__", but that keyname could be changed for the (I guess very few) 
> cases where that key conflicted with non-default content of the dict.  Then 
> dict.__init__ would simply take __default__ = value as a keyword argument, as it 
> does today, and __getitem__ for a missing key would return 
> dict.__getitem__(self, "__default__")

I thought about this too (providing a singleton instance named Default,
just like None is, and using it as a key), but you would have to
special-case the (iter)keys,values,items methods to exclude the default
- definitely too much work, and too much magic.

> Alternatively, you could provide factory functions to construct the defaultdict. 
>   Someone (Michele?) recently posted an implementation of this

Yes, I think this could be reasonable.

> 3. Can you work in the tally and listappend methods that started this whole 
> thread off?

They aren't necessary any longer.

Use defaultdict.setdefaultvalue(0) instead of the tally approach and
defaultdict.setdefaultfactory(list) instead of listappend.

> 4. On super, no I don't think it's necessary or particularly desirable.  These 
> specializations have a close association with dict.  dict.method(self,...) feels 
> more appropriate in this case.

Any other opinions on this?

Thanks for the comments,

mfg
Georg


From jack at performancedrivers.com  Thu Apr 21 11:33:00 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Thu, 21 Apr 2005 11:33:00 -0400
Subject: Private class?
In-Reply-To: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
References: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
Message-ID: <20050421153300.GC18907@performancedrivers.com>

On Thu, Apr 21, 2005 at 06:13:02AM -0700, codecraig wrote:
> Hi,
>   First, I come from a Java background.
> 
>   Ok, so I have this idea that I want to create an EventBus...basically
> a central class where objects can register themselves as listeners for
> different events.  This central class also has methods so that objects
> can fire events.  Something like this...
> 
> Say we have object MrTree and object MotherNature.  MrTree listens for
> EVENT_GROW_LEAVES.  So, when MrTree "hears" about EVENT_GROW_LEAVES,
> MrTree will do just that, grow some leaves.  So, while our python app
> is running, MotherNature needs to tell MrTree to grow leaves.  I am
> suggesting something like this...
> 
> 1. MrTree has a method, growLeaves()
> 
> 2. MrTree registers for the event, EventBus.register(MrTree,
> EVENT_GROW_LEAVES)
> 
> 3. MotherNature fires grow leaves, EventBus.fire(EVENT_GROW_LEAVES)
> 
> 4. MrTree's growLeaves method gets called by EventBus.
> 
<snip>

Singletons are overrated, if you need a namespace just use a class or
module as another responder suggested.  Some of the indirection you
need to do this in Java goes away in python because you can do things
like pass around bound function objects.  Here is some code that includes
those  suggestions.

class EventCaller(object):
  def __init__(self):
    self.listeners = []
    return
  def append(self, listener):
    self.listeners.append(listener)
    return
  def __call__(self):
    for (listener) in self.listeners:
      listener()
    return

class EventBus(object):
  growLeaves = EventCaller()

class MrTree(object):
  def __init__(self):
    EventBus.growLeaves.append(self.growLeaves)

  def growLeaves(self): pass

class MotherNature(object):
  def doStuff(self):
    EventBus.growLeaves()


The EventCaller class is overloaded to behave both like a list and
like a function.  The EventBus class never gets instantiated, it is
just used as a place to lookup the different event queues.  MrTree
doesn't need to inherit from an interface class, his growLeaves method
is just a function that we can pass around.

-jackdied


From rune.strand at gmail.com  Mon Apr  4 19:08:32 2005
From: rune.strand at gmail.com (runes)
Date: 4 Apr 2005 16:08:32 -0700
Subject: sparse sets of integers?
In-Reply-To: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
References: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
Message-ID: <1112656112.650114.261720@z14g2000cwz.googlegroups.com>

You have sets in Python 2.3x and 2.4x. I don't know if they can handle
your amounts of data, but i guess so.



From mmanso at amplitudenet.pt  Sun Apr 24 16:13:33 2005
From: mmanso at amplitudenet.pt (Miguel Manso)
Date: Sun, 24 Apr 2005 21:13:33 +0100
Subject: Getting into Python, comming from Perl.
In-Reply-To: <8664ycq7x6.fsf@guru.mired.org>
References: <mailman.2409.1114365369.1799.python-list@python.org>
	<8664ycq7x6.fsf@guru.mired.org>
Message-ID: <426BFDED.5040004@amplitudenet.pt>

Mike Meyer wrote:

>Miguel Manso <mmanso at amplitudenet.pt> writes:
>
>  
>
>>I've tryed to use python some times but I get frustrated very quick. I
>>get myself many times needing to figure out how to loop through a
>>list, declare an associative array, checking how to pass named
>>parameters to functions, and simple things like that.
>>    
>>
>
>I went through some of those frustrations.
>
>  
>
>>What I would like to know is if anyone had these problems and if you
>>can share that experience with me. I'm trying to minimize my
>>"frustration" :)
>>    
>>
>
>The thing is, the answers to all your questions are in the
>documentation. You just need to know the Python names for things, and
>not the Perl names. For instance, Python calls it's associative array
>structure a dictionary, and a checking the documentation index for
>dictionary turns up a link to the syntax for declaring one as
>display/dictionary.
>
>Read through the tutorial. Then look through some "interesting"
>modules in the standard library to see how these things fit together.
>
>        <mike
>  
>

I guess I'll just do that. I'll put the frustration in a bag, grab the 
documentation and try to figure it out.

Thanks all.

-- 
Miguel Manso <mmanso at amplitudenet.pt>
============================================
Amplitude Net
Net - Rua dos Salazares, 842
4100-442 Porto

Phone: +351 22 532 2000
Fax: +351 22 618 2157
Web: www.amplitudenet.pt
============================================

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From mwakabayashi at gmail.com  Wed Apr 20 19:27:24 2005
From: mwakabayashi at gmail.com (Mike)
Date: 20 Apr 2005 16:27:24 -0700
Subject: Writing to stdout and a log file
In-Reply-To: <d45jgf$bks$1@gemini.csx.cam.ac.uk>
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
	<mailman.2142.1113957130.1799.python-list@python.org>
	<1113958286.367038.182330@z14g2000cwz.googlegroups.com>
	<d45jgf$bks$1@gemini.csx.cam.ac.uk>
Message-ID: <1114039644.372665.210570@o13g2000cwo.googlegroups.com>

Perfect. This is what I"ll use. Thanks! Mike



From artiegold at austin.rr.com  Sun Apr 17 23:05:29 2005
From: artiegold at austin.rr.com (Artie Gold)
Date: Sun, 17 Apr 2005 22:05:29 -0500
Subject: Problem with unpack hex to decimal
In-Reply-To: <d3ueer$avn$1$8302bc10@news.demon.co.uk>
References: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>
	<d3ueer$avn$1$8302bc10@news.demon.co.uk>
Message-ID: <3cgmfsF6hud65U1@individual.net>

Jonathan Brady wrote:
> <serpent17 at gmail.com> wrote in message 
> news:1113763068.002612.240940 at l41g2000cwc.googlegroups.com...
> 
>>Hello,
>>
>>I was looking at this:
>>http://docs.python.org/lib/module-struct.html
>>and tried the following
>>
>>
>>>>>import struct
>>>>>struct.calcsize('h')
>>
>>2
>>
>>>>>struct.calcsize('b')
>>
>>1
>>
>>>>>struct.calcsize('bh')
>>
>>4
>>
>>I would have expected
>>
>>
>>>>>struct.calcsize('bh')
>>
>>3
>>
>>what am I missing ?
> 
> 
> Not sure, however I also find the following confusing:
> 
>>>>struct.calcsize('hb')
> 
> 3
> 
>>>>struct.calcsize('hb') == struct.calcsize('bh')
> 
> False
> 
> I could understand aligning to multiples of 4, but why is 'hb' different 
> from 'bh'? 
> 
> 
Evidently, shorts need to be aligned at an even address on your 
platform. Consider the following layout, where `b' represents the signed 
char, `h' represents the bytes occupied by the short and `X' represents 
unused bytes (due to alignment.

'bh', a signed char followed by a short would look like:

bXhh -- or four bytes, but 'hb', a short followed by a signed char would be:

hhb (as `char' and its siblings have no alignment requirements)

HTH,
--ag

-- 
Artie Gold -- Austin, Texas
http://it-matters.blogspot.com (new post 12/5)
http://www.cafepress.com/goldsays


From programmer.py at gmail.com  Wed Apr 27 15:30:46 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Wed, 27 Apr 2005 14:30:46 -0500
Subject: Problem with sending a variable(python) while using html
In-Reply-To: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
References: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
Message-ID: <d52c72d205042712306fe76889@mail.gmail.com>

On 4/27/05, Hansan <none at bag.python.org> wrote:
> Hi all.
> 
> I am working on a webpage where I use python and html.
> 
> When I want to send one variable to a new script/page I use the following
> code:
> 0) print '''<input type=hidden name="eventid"
> value='''+str(variable_name)+'''>'''
> 
> This works fine, the problem occurs when I want to send a variable to a page
> while using a 1)meta refresh or a 2)Href.
> 1) and 2) works fine as they are but not when I try to send the variable
> with them.
> 
> The working version of 1) and 2) could look like
> 1) print ''<META HTTP-EQUIV="Refresh" CONTENT="0;URL=page xxx">'''
> 2) print "<a href='page xxx?id=", variable,  "'>", "some text", "</a>"
> 

What exactly does the "non-working" version look like?  Perhaps a
snippet of broken code would be helpful here?

jw


From jstroud at mbi.ucla.edu  Tue Apr 12 20:48:00 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 12 Apr 2005 17:48:00 -0700
Subject: singleton objects with decorators
In-Reply-To: <425c3823.221291079@news.oz.net>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>
	<425c3823.221291079@news.oz.net>
Message-ID: <200504121748.00475.jstroud@mbi.ucla.edu>

Other than using modules, I thought @classmethod took care of this kind of 
need:

class SingleThing:
  some_values = {"fanciness":0}
  def __init__(self):
    raise Exception, "not enough preceding stars to be fancy enough"
  @classmethod
  def why_so_fancy(self):
    print "why make every thing so fancy?"

I call this pattern:

"Using a Class to Be Something Single Because It Already Is Single"

or "uactbssbiais", for short.

James

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

http://www.jamesstroud.com/


From ville at spammers.com  Wed Apr 13 02:42:57 2005
From: ville at spammers.com (Ville Vainio)
Date: 13 Apr 2005 09:42:57 +0300
Subject: win32 readline maintenance (was Re: IPython - problem with...
References: <3bv5mgF6jbil9U1@individual.net>
	<1113323786.737140.184800@o13g2000cwo.googlegroups.com>
	<mailman.1780.1113327396.1799.python-list@python.org>
Message-ID: <du7pswz89e6.fsf_-_@lehtori.cc.tut.fi>

>>>>> "Fernando" == Fernando Perez <fperez.net at gmail.com> writes:

    Fernando> Bummer.  I wonder, if the changes are minor and easy,
    Fernando> perhaps you (or someone else) could offer Gary to take
    Fernando> over maintenance of readline/win32?  It sounds

Someone on the ipython mailing list already had patches for it - I
think it was for Belgian keyboards. She didn't submit the patches,
just asked whether she should submit them.

    Fernando> like he is perhaps too busy to keep up with the patches
    Fernando> and improvements, so perhaps it's time for someone else
    Fernando> to take over?  That kind of library, while

Optimally, something like this should be in the pywin32 package. I
suppose it could be hosted at scipy if someone was to take over the
maintenance? It's open source, so the maintenance doesn't need to be
"transferred" - just put up version control somewhere and we'll see
what happens :-).

In the meantime I would suggest win32 users to do as I do and use a
different keyboard layout. US layout is better for programming anyway
and you learn it in a day or two. Settings->Control Panel->Regional
Options->Input Locales.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From fredrik at pythonware.com  Thu Apr 21 11:16:34 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 17:16:34 +0200
Subject: recording data between [ and ]
References: <d488q5$apl$1@solaris.cc.vt.edu><UbqdnXB1cNHtLvrfRVn-rw@powergate.ca><d48cpb$hij$1@solaris.cc.vt.edu>
	<d48fc1$2rm$00$1@news.t-online.com>
Message-ID: <d48fs5$eqg$1@sea.gmane.org>

Diez B. Roggisch wrote:

> Welcome to the wonderful world of programming. Regular expressions are what
> they are because they are modeled after a certain theory - that of finite
> state automata and their correspondence to certain classes of grammars.

(except that Python regexps are not always regular, of course.  and that back-
tracking engines like the ones used in Perl and Python differs in subtle ways
from "real" DFA-based engines, etc.  but as long as you're looking at things
from a proper distance, you're right, of course)

</F>



From deetsNOSPAM at web.de  Mon Apr 18 17:54:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 18 Apr 2005 23:54:49 +0200
Subject: Wrapping C++ Class Heirachy in Python
References: <d419gb$r67$1@pump1.york.ac.uk>
Message-ID: <d41aau$8o5$03$1@news.t-online.com>

> PyType_Ready but in Python the base class isn't recognised. Is there
> anything obvious I'm missing?

Maybe - I'd go for one of the several available python wrapper generators. I
personally had good experiences with SIP. But you might also try boost
python or SWIG. 

The python C-API is great - for C. For C++, use one of the above.
-- 
Regards,

Diez B. Roggisch


From nicksjacobson at yahoo.com  Wed Apr  6 15:01:23 2005
From: nicksjacobson at yahoo.com (nicksjacobson at yahoo.com)
Date: 6 Apr 2005 12:01:23 -0700
Subject: number conversion
Message-ID: <1112810997.893405.58560@g14g2000cwa.googlegroups.com>

I'm writing a program to read in raw data from a WAV file, and write it
to an IT file.  I got this to work in C by reading the data into an
array of unsigned chars called "RawDataAry", then converted it to
signed chars by doing the following:

signed char *CharAry = malloc(sizeof(signed char) * frames);
for (i = 0; i < input_frames; i++)
    CharAry[i] = (signed char)(((signed short)WavDataAry[i]) - 128);

It worked.


But when I tried to do this kind of conversion in Python, I got an
OverflowError exception.

First I read the data into an array of unsigned chars:

fmt = str(chunklen) + 'B'
fmtsize = struct.calcsize(fmt)
rawdata = struct.unpack(fmt, s[:fmtsize])
rawdata = list(rawdata)

Then I tried to convert it:

charary = array.array('b')
charary.fromlist(rawdata)

This last line threw the OverflowError exception, "OverflowError:
signed char is greater than maximum."

Is there a way to do this??  Thanks a lot in advance!!

--Nick



From tim at fourstonesExpressions.com  Thu Apr 21 23:27:45 2005
From: tim at fourstonesExpressions.com (Tim Stone)
Date: Thu, 21 Apr 2005 22:27:45 -0500
Subject: Manipulating large blobs in Python
Message-ID: <42686F31.3060101@fourstonesExpressions.com>

I'm working on a module that will manipulate large blobs.  I'm using a C 
dll to allocate big blocks of memory, using PyMem_Malloc, which is 
working quite well up until I try to manipulate a blob that exhausts 
Python's heap.  I'm guessing that to increase the heapsize, I'm going to 
have to recompile python... (??)  Am I on the right track?  If so, can 
you steer me toward some instructions on how to do that compile?  I'm a 
command-line make kind of dude, and I don't see any of that kind of 
stuff in the source distribution.  I see .vcproj xml-ish files... do I 
need some version of visual studio ide to do the windows compile?  It'd 
be great if there was some way to increase the heapsize without all that 
bother :)

Tim Stone


From lee at example.com  Fri Apr 15 16:46:54 2005
From: lee at example.com (Lee Harr)
Date: Fri, 15 Apr 2005 20:46:54 GMT
Subject: Determine ip address
References: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
Message-ID: <2LV7e.1491$ik2.186@news02.roc.ny>

On 2005-04-15, codecraig <codecraig at gmail.com> wrote:
> hi,
>    how can i use python to figure the ip address of the machine which
> the python script is running on?  I dont mean like 127.0.0.1....but i
> want the external IP address (such as ipconfig on windows displays).
>
> any ideas??
>



I use this:

#conf.py
ifconfig = '/sbin/ifconfig'
iface = 'eth0'
telltale = 'inet addr:'


#addr.py
import commands

from conf import ifconfig, iface, telltale

def my_addr():
    cmd = '%s %s' % (ifconfig, iface)
    output = commands.getoutput(cmd)

    inet = output.find(telltale)
    if inet >= 0:
        start = inet + len(telltale)
        end = output.find(' ', start)
        addr = output[start:end]
    else:
        addr = ''



From tim.leeuwvander at nl.unisys.com  Mon Apr 18 08:14:31 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 18 Apr 2005 05:14:31 -0700
Subject: Can a function be called within a function ?
In-Reply-To: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
References: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
Message-ID: <1113826471.743794.237160@z14g2000cwz.googlegroups.com>

Hiya,

That's certainly possible, it's standard practice.

(It might be cleaner to pass filenames using parameters though)

cheers,

--Tim



From michele.simionato at gmail.com  Fri Apr  8 08:38:33 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Apr 2005 05:38:33 -0700
Subject: Multiple inheritance: Interface problem workaround,
	please comment this
In-Reply-To: <slrnd5c9qk.9rm.axel@m2.sine>
References: <slrnd5am6f.7ed.axel@m2.sine><ybCdnTBdnr30w8jfRVn-pQ@comcast.com>
	<slrnd5c9qk.9rm.axel@m2.sine>
Message-ID: <1112963912.909325.186760@f14g2000cwb.googlegroups.com>

Axel:

> So, if there are ready class-modules, and I want to use them for
> multiple inheritance, I've to rewrite the init's of classes in the
> module!

Or you use a metaclass that rewrites the __init___ method for you.

This is a start (warning: written in 5 minutes and not tested more than
you see):

"""Given a hierarchy, makes __init__ cooperative.
The only change needed is to add a line

    __metaclass__ = CooperativeInit

to the base class of you hierarchy."""

from decorate import decorate # see today thread on decorators for this

def make_cooperative_init(cls, name, bases, dic):

    def call_cooperatively(__init__, self, *args, **kw):
        super(cls, self).__init__(*args, **kw)
        __init__(self, *args, **kw)

    __init__ = cls.__dict__.get("__init__")
    if __init__:
        cls.__init__ = decorate(__init__, call_cooperatively)

class CooperativeInit(type):
    __init__ = make_cooperative_init

class Base:
    __metaclass__ = CooperativeInit
    def __init__(self):
        print "B.__init__"

class C1(Base):
    def __init__(self):
        print "C1.__init__"

class C2(Base):
    def __init__(self):
        print "C2.__init__"

class D(C1, C2):
    def __init__(self):
        print "D.__init__"




D()

# you get
# B.__init__
# C2.__init__
# C1.__init__
# D.__init__


                  Michele Simionato



From elbertlev at hotmail.com  Sun Apr 10 09:02:37 2005
From: elbertlev at hotmail.com (elbertlev at hotmail.com)
Date: 10 Apr 2005 06:02:37 -0700
Subject: Help understanding code
In-Reply-To: <mailman.1638.1113136579.1799.python-list@python.org>
References: <mailman.1638.1113136579.1799.python-list@python.org>
Message-ID: <1113137392.623068.128070@o13g2000cwo.googlegroups.com>

Reading the language tututorial would help you a lot :(

=== what is the difference between pc and pc()?

pc = getToolByName(....)  - returnes a refference to a method

pc is a refference to a method, pc() is a method invocation.

============

       	   numbers = {"total":len(results),"bytype":{},"bystate":{}}
<=== This is hard to understand
           num = numbers["bytype"].get(ctype, 0)  <==== where does .get
come from? and what is the string 'bytype' doing?
           numbers["bytype"][ctype] = num    <====== is this some kind
of an array? 

Read the tutorial especially portion about dictionaries!



From sabbey at u.washington.edu  Tue Apr 19 00:11:52 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Mon, 18 Apr 2005 21:11:52 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <eve761hv7vjktfppqb51eigi9otl0fldh6@4ax.com>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
	<3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
	<Pine.A41.4.61b.0504171920010.34498@dante69.u.washington.edu>
	<eve761hv7vjktfppqb51eigi9otl0fldh6@4ax.com>
Message-ID: <Pine.A41.4.61b.0504181043530.113056@dante74.u.washington.edu>

Ron_Adam wrote:
> The load and dump would be private to the data class object. Here's a
> more complete example.
>
> import pickle
> class PickledData(object):
> 	def __init__(self, filename):
> 		self.filename = filename
> 		self.L = None
> 		try:
> 			self._load()
> 		except IOError:
> 			self.L = []
> 	def _load(self):
> 		f = open(self.filename, 'r')
> 		self.L = pickle.load(f)
> 		f.close()
> 	def _update(self):
> 		f = open(self.filename, 'w')
> 		pickle.dump(self.L, f)
> 		f.close()
> 	def append(self, record):
> 		self.L.append(record)
> 		self._update()
> 	# add other methods as needed ie.. get, sort, clear, etc...
>
> pdata = PickledData('filename')
>
> pdata.append('more data')
> pdata.append('even more data')
>
> print pdata.L
> ['more data', 'even more data']
>
>
>> This has the same issues as with opening and closing files:  losing the
>> 'dump', having to always use try/finally if needed, accidentally
>> re-binding 'p', significantly more lines.  Moreover, class 'Pickled' won't
>> be as readable as the 'pickled_file' function above since 'load' and
>> 'dump' are separate methods that share data through 'self'.
>
> A few more lines to create the class, but it encapsulates the data
> object better. It is also reusable and extendable.

This class isn't reusable in the case that one wants to pickle something 
other than an array.  Every type of object that one would wish to pickle 
would require its own class.

Also, this implementation behaves differently because the object is 
re-pickled after every modification.  This could be a problem when writing 
over a network, or to a shared resource.

-Brian


From bearophileHUGS at lycos.com  Mon Apr 11 15:39:10 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Apr 2005 12:39:10 -0700
Subject: Smart help again
References: <1113154873.292836.251810@l41g2000cwc.googlegroups.com>
	<1113162633.524074.91440@f14g2000cwb.googlegroups.com>
Message-ID: <1113248350.694945.204130@o13g2000cwo.googlegroups.com>

>You can create your own Exception class, based on this recipe:<

Thank you for your answer, the recipe you have suggested gives a very
big output, but it doesn't contain what I've asked for... :-) I was
asking to see that faulty method/function parameters (or the first line
of its docstring).
Probably the use of sys.excepthook is better, because you don't need
that
except: raise test.Error('xxx')
I've studied that solution of yours, and I think I still have to learn
many things about Python :-)

Bye, thank you,
Bearophile



From fumanchu at amor.org  Sun Apr 17 02:08:22 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 16 Apr 2005 23:08:22 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E33987E3@exchange.hqamor.amorhq.net>

Bengt Richter wrote:
> The '::' unary suite operator should return an ordered dict 
> subtype representing the bindings

Why ordered?


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From dthierbach at usenet.arcornews.de  Sat Apr  9 10:28:43 2005
From: dthierbach at usenet.arcornews.de (Dirk Thierbach)
Date: Sat, 9 Apr 2005 16:28:43 +0200
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<20050409082128.A3E.0.NOFFLE@dthierbach.news.arcor.de>
Message-ID: <20050409142843.26D9.0.NOFFLE@dthierbach.news.arcor.de>

Dirk Thierbach <dthierbach at usenet.arcornews.de> wrote:

> Ok. Multiple inheritance can often select priority for conflicting
> methods. If you can specify yhat tou want "column priority" for
> each class, you're fine.

On second thought, I had doubts. Consider the following scenario:

   A2 | f   <-   A3 
   ^             ^    
   |             |    
   B2 | f   <-   B3   
   ^             ^    
   |             |    
   C2       <-   C3 | g

Assume g calls f. Since f is defined in B version 2, it should taken
over unchanged into B version 3, and that should be the version g
calls. However, with multiple inheritance doing depth-first search,
giving the "upper" class priority over the "left", the first path
searched is B3 - A3 - A2, and hence it finds f at A2. A quick test
confirms this for old-style classes, which failed in exactly that
way. But with new-style classes, it works, and finds f at B2 instead.

So I dug through the documentation and found that new-style classes
compute a monotonic linearization of the inheritance graph, observing
local precedence order, using the algorithm also used in Dylan
described here:

http://www.webcom.com/haahr/dylan/linearization-oopsla96.html

And this algorithm will even work correctly if one leaves out B3
in the example above, inheriting directly as in C3(A3,C2), because
the ordering constraint that A2 comes before B2 will still be
valid in the linearization for C3. 

However, in the following case (shortening the notation even more)
it will fail, if a method defined at C3 is looked up at D4:

   A1 - A2 - A3 - A4 - ...
   |    |    |    |
   B1 - B2 - +  - B4 - ...
   |    |    |    |
   C1 - +  - C3 - +  - ...
   |    |    |    |
   D1 - D2 - +  - D4 - ...
   |    |    |    |

The solution is simply to include C3 in the list of parents of D4, as
in D4(C3,B4,D2). So for every hole in a column, you have to include
the first class (or classes, if the hole spans multiple rows) to the
left of the hole as parents if the class just below the hole, in order
from bottom to top. This adds the missing constraints, and should
solve the problem without any need to write __metaclass__ stuff.

Interesting question. I learned a lot while thinking about that.

- Dirk


From zolkos+newsgroups at gmail.com  Mon Apr 25 14:12:19 2005
From: zolkos+newsgroups at gmail.com (Robert)
Date: Mon, 25 Apr 2005 18:12:19 +0000
Subject: pygtk and long running process
References: <pan.2005.04.25.10.17.03.869604@gmail.com>
	<426C406F.2070702@gmail.com> <426C4C0C.9070609@gmail.com>
Message-ID: <pan.2005.04.25.18.12.15.653970@gmail.com>

On Sun, 24 Apr 2005 19:46:52 -0600, Daniel Cer wrote:

> Daniel Cer wrote:
>> Robert wrote:
>> 
>>> I have a command line app that can take up to 20 minutes to complete and
>>> every minute or so updates it's status (spits it out to console).  I am
>>> writing a front end for this app in python/gtk and was wondering what
>>> command I use to a) invoke the command and b) how to capture it's out put
>>> and for instance update a text box.
>> 
>> 
>> os.popen() will probably do what you want.
>> 
>> e.g.:
> 
> (....)
> 
> As for the latter part of (b)....
> 
> I don't know much about pygtk, but I imagine you should be able to put 
> the code that monitors the external program in a thread, and then 
> whenever you get some new status information update the text box.
> 
> -Dan

Thanks for your help



From simon.dahlbacka at gmail.com  Fri Apr 29 02:55:06 2005
From: simon.dahlbacka at gmail.com (simon.dahlbacka at gmail.com)
Date: 28 Apr 2005 23:55:06 -0700
Subject: logging problems
In-Reply-To: <d4rv8i$dre$1@gemini.csx.cam.ac.uk>
References: <mailman.2.1114733852.14961.python-list@python.org>
	<d4rv8i$dre$1@gemini.csx.cam.ac.uk>
Message-ID: <1114757706.562951.242300@l41g2000cwc.googlegroups.com>

I probably did not mention it, but I've used traceback module in other
places, and it works fine.

We've been planning to upgrade to 2.4 but unfortunately I cannot do
that right now, and no, I have not messed with any other system modules.



From littlejohn.75 at news.free.fr  Wed Apr 20 06:58:35 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 20 Apr 2005 10:58:35 GMT
Subject: trying to understand unicode
Message-ID: <426635db$0$2079$626a14ce@news.free.fr>

Python has a very good support of unicode, utf8, encodings ... But I
have some difficulties with the concepts and the vocabulary. The
documentation is not bad, but for example in reading
http://docs.python.org/lib/module-unicodedata.html
I had a long time to figure out what unicodedata.digit(unichr) would
mean, a simple example is badly lacking.

So I wrote the following script :

#!/usr/bin/env python

"""Example of use of the unicodedata module
http://docs.python.org/lib/module-unicodedata.html
"""

import unicodedata
import sys

# outcodec = 'latin_1'
outcodec = 'iso8859_15'
if len(sys.argv) > 1:
    outcodec = sys.argv[1]

for c in range(256):
    uc = unichr(c)
    uname = unicodedata.name(uc, None)
    if uname:
        unfd = unicodedata.normalize('NFD', uc).encode(outcodec,
'replace')
        unfc = unicodedata.normalize('NFC', uc).encode(outcodec,
'replace')
        print str(c).ljust(3), uname.ljust(42), unfd.ljust(2),
unfc.ljust(2), \
                unicodedata.category(uc), unicodedata.numeric(uc, None)


and here are some samples of output
44  COMMA                                      ,  ,  Po None
45  HYPHEN-MINUS                               -  -  Pd None
46  FULL STOP                                  .  .  Po None
47  SOLIDUS                                    /  /  Po None
48  DIGIT ZERO                                 0  0  Nd 0.0
49  DIGIT ONE                                  1  1  Nd 1.0
50  DIGIT TWO                                  2  2  Nd 2.0

It seems that 'Nd' category means Numerical digit  doh!

64  COMMERCIAL AT                              @  @  Po None
65  LATIN CAPITAL LETTER A                     A  A  Lu None
66  LATIN CAPITAL LETTER B                     B  B  Lu None

'Lu' should read 'Letter upper' ?

94  CIRCUMFLEX ACCENT                          ^  ^  Sk None
95  LOW LINE                                   _  _  Pc None
96  GRAVE ACCENT                               `  `  Sk None
97  LATIN SMALL LETTER A                       a  a  Ll None
98  LATIN SMALL LETTER B                       b  b  Ll None
'Ll' == Letter lower

124 VERTICAL LINE                              |  |  Sm None
125 RIGHT CURLY BRACKET                        }  }  Pe None
126 TILDE                                      ~  ~  Sm None
160 NO-BREAK SPACE                             ?  ?  Zs None
161 INVERTED EXCLAMATION MARK                  ?  ?  Po None

What a gap !

245 LATIN SMALL LETTER O WITH TILDE            o? ?  Ll None
246 LATIN SMALL LETTER O WITH DIAERESIS        o? ?  Ll None
247 DIVISION SIGN                              ?  ?  Sm None
248 LATIN SMALL LETTER O WITH STROKE           ?  ?  Ll None

'Sm' should read 'sign mathematics' ?

I think that such code snippets should be included in the documentation
or in a Wiki.

Regards

Sorry for bad english, I'm not a native speaker.


From codecraig at gmail.com  Mon Apr 25 08:17:32 2005
From: codecraig at gmail.com (codecraig)
Date: 25 Apr 2005 05:17:32 -0700
Subject: figuring out # of bytes
In-Reply-To: <87is2cqsvc.fsf@pobox.com>
References: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
	<mailman.2309.1114202268.1799.python-list@python.org>
	<87is2cqsvc.fsf@pobox.com>
Message-ID: <1114431452.925701.55600@g14g2000cwa.googlegroups.com>

so each character in the string is 1 byte? if so, can u point me to
somewhere that states that perhaps?

thanks



From martin.witte at gmail.com  Tue Apr 12 14:57:23 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 12 Apr 2005 11:57:23 -0700
Subject: Smart help again
In-Reply-To: <1113248350.694945.204130@o13g2000cwo.googlegroups.com>
References: <1113154873.292836.251810@l41g2000cwc.googlegroups.com>
	<1113162633.524074.91440@f14g2000cwb.googlegroups.com>
	<1113248350.694945.204130@o13g2000cwo.googlegroups.com>
Message-ID: <1113332243.798874.86110@o13g2000cwo.googlegroups.com>

I hope a rewrite makes it a bit more clear for you.

The test module is defined below, it contains a simplified Error
object, it resemble the one I use a lot in my own scripting. The test
file generates an error ( A  ZeroDivisionError in method eggs of class
Spam).

-#!/usr/bin/env python

-import test, sys
-
-try:
-    try:
-        class Spam:
-            def eggs(self):
-                return 1/0
-        foo = Spam()
-        foo.eggs()
-    except Exception, e:
-        raise test.Error('%s: %s' % (e.__class__.__name__, e))
-except test.Error, e:
-    print >> sys.stderr, e.__class__.__name__, e

The Error class takes the last exception, and tries to find the
originating method of that exception, by unwinding the stacktrace


-import sys, traceback
-class Error:
-    def __init__(self, arg):
-        tb = sys.exc_info()[2]
-       while 1:
-            if not tb.tb_next:
-                break
-            tb = tb.tb_next
-        stack = []
-        f = tb.tb_frame
-        while f:
-            stack.append(f)
-            f = f.f_back
-
-        error_originator = stack[0]
-
-        (obj, instance) = error_originator.f_locals.items()[0]
-
-        self._str = 'class instance: %s, method: %s raises %s' % \
-                    (instance, \
-                     error_originator.f_code.co_name, \
-                     arg)
-
-    def __repr__(self):
-        return repr(self._str)

Now the output is:


Error 'class instance: <__main__.Spam instance at 0xb7e0444c>, method:
eggs raises ZeroDivisionError: integer division or modulo by zero'

Now you see the class and methos where the exception was raised,
although I admit that it is quite complicated with all the exception
handling



From jerf at jerf.org  Tue Apr 26 17:39:16 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 17:39:16 -0400
Subject: regex over files
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
	<426EAA9D.2050904@jessikat.fsnet.co.uk>
Message-ID: <pan.2005.04.26.21.39.15.988504@jerf.org>

On Tue, 26 Apr 2005 20:54:53 +0000, Robin Becker wrote:

> Skip Montanaro wrote:
> ...
>> If I mmap() a file, it's not slurped into main memory immediately, though as
>> you pointed out, it's charged to my process's virtual memory.  As I access
>> bits of the file's contents, it will page in only what's necessary.  If I
>> mmap() a huge file, then print out a few bytes from the middle, only the
>> page containing the interesting bytes is actually copied into physical
>> memory.
> ....
> my simple rather stupid experiment indicates that windows mmap at least 
> will reserve 25Mb of paged file for a linear scan through a 25Mb file. I 
> probably only need 4096b to scan. That's a lot less than even the page 
> table requirement. This isn't rocket science just an old style observation.

Are you trying to claim Skip is wrong, or what? There's little value in
saying that by mapping a file of 25MB into VM pages, you've increased your
allocated paged file space by 25MB. That's effectively tautological. 

If you are trying to claim Skip is wrong, you *do not understand* what you
are talking about. Talk less, listen and study more. (This is my best
guess, as like I said, observing that allocating things increases the
number of things that are allocated isn't worth posting so my thought is
you think you are proving something. If you really are just posting
something tautological, my apologies and disregard this paragraph but,
well, it's certainly not out of line at this point.)


From Mccormick.Johnw at epamail.epa.gov  Mon Apr 11 12:05:05 2005
From: Mccormick.Johnw at epamail.epa.gov (Mccormick.Johnw at epamail.epa.gov)
Date: Mon, 11 Apr 2005 12:05:05 -0400
Subject: Sockets (Dan)
Message-ID: <OF2D6BB4B9.3C64B94B-ON85256FE0.00584DBF-85256FE0.00585B36@epamail.epa.gov>

##############################################
John W. McCormick, Systems Programmer / DBA
High Performance Computing & Scientific Visualization
Lockheed Martin Information Technology, Supporting the EPA
Research Triangle Park, NC
919-541-0890

Federal Infrastructure Contact - Ravi Nair
919-541-5467    -  nair.ravi at epa.gov
Federal Infrastructure Contact - Joe Retzer, Ph.D.
919-541-4190    -  retzer.joseph at epa.gov
----- Forwarded by JohnW McCormick/RTP/USEPA/US on 04/11/2005 12:04 PM
-----
                                                                        
             JohnW                                                      
             McCormick/RTP/US                                           
             EPA/US                                                  To 
                                      python-list at python.org            
             04/11/2005 12:03                                        cc 
             PM                                                         
                                                                Subject 
                                      Sockets (Dave Brueck)             
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                                                                        




Hello, ... I am John McCormick (Systems Programmer ) and I am currently
working on a python program which will connect (user) specified inputs
and connect them to (user) selected outputs (like screen or
video/audio-recording devices) and would like to know if there's a
technique to "test" or "sense" if the desired output device is busy
without interrupting the output device while checking to see if it's
busy... ?? If, perhaps, python does not have this type of feature, I
wonder if you could give me some type of direction (ie., manufacturer's
device response checking techniques that could be used in conjunction
with python) but the bottom line is not to "crash" or interrupt the
desired output device (if it's still busy)...

Thank You



John McCormick



##############################################
John W. McCormick, Systems Programmer / DBA
High Performance Computing & Scientific Visualization
Lockheed Martin Information Technology, Supporting the EPA
Research Triangle Park, NC
919-541-0890

Federal Infrastructure Contact - Ravi Nair
919-541-5467    -  nair.ravi at epa.gov
Federal Infrastructure Contact - Joe Retzer, Ph.D.
919-541-4190    -  retzer.joseph at epa.gov



From jjl at pobox.com  Fri Apr 22 17:03:40 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 21:03:40 +0000
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
	<1114188913.806103.120830@f14g2000cwb.googlegroups.com>
Message-ID: <87br86le1f.fsf@pobox.com>

pyguy2 at gmail.com writes:

> >This change is NOT a good idea!!
> I agree the .pyw shortcut method is better. However, if you are willing
> to lose
> stdin,stdout,stderr and really never want a console window to pop up, I
> do not see how it is a disasterous change. You can still run python.exe
> on your py files when you want  to test your code.
[...]

Under some Windows OSes (95/98/ME?) writing to stdout in a Windows app
(.pyw) can crash the Python interpreter.


John


From robin at reportlab.com  Fri Apr 15 08:40:08 2005
From: robin at reportlab.com (Robin Becker)
Date: Fri, 15 Apr 2005 13:40:08 +0100
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <200504141447.05710.james@wrong.nu>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<200504141447.05710.james@wrong.nu>
Message-ID: <425FB628.3020301@chamonix.reportlab.co.uk>

R. C. James Harlow wrote:
> On Thursday 14 April 2005 10:27, c3poptuse at yahoo.com wrote:
> 
>>Supercomputer and encryption and compression @ rate of 96%
> 
> 
> <snip>
> 
> Dear Sir or Madam,
>     I have received notification that you posted a compression algorithm on 
> the newsgroup comp.lang.python on or about 10:27:26 on the 04/14/2005. I am 
> writing to you to inform you that the algorithm published infringes my 
> "zero-bit compression" algorithm, US Pat No. 13375P33K, which details the 
> transmission of information using no bandwidth to achieve a 100% 
> compression. Please immediately follow up with a retraction of rights to this 
> algorithm or you will hear from my solicitor, Mr J. Peasbody.
> 
>     Yours in law,
>         James Harlow.
> 
Isn't it time we decompressed Adolf Hitler so that this thread can die?
-- 
Robin Becker



From philippe at philippecmartin.com  Mon Apr 25 15:51:10 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 25 Apr 2005 19:51:10 GMT
Subject: ANN: PyDev 0.9.3 released
References: <42261366.3020602@esss.com.br> <424C2A8E.9030104@esss.com.br>
	<mailman.2479.1114451614.1799.python-list@python.org>
Message-ID: <OSbbe.306$461.263@newssvr11.news.prodigy.com>

Hi,

For some reason, Eclipse automatic search for updating existing features
does not see it ....

Regards,

Philippe





Fabio Zadrozny wrote:

> Hi All,
> 
> PyDev - Python IDE (Python development enviroment for Eclipse) version
> 0.9.3 has just been released.
> 
> Check the homepage (http://pydev.sourceforge.net/) for more details.
> 
> Regards,
> 
> Fabio Zadrozny
> ------------------------------------------------------
> Software Developer
> 
> ESSS - Engineering Simulation and Scientific Software
> www.esss.com.br
> 
> PyDev - Python Development Enviroment for Eclipse
> pydev.sf.net
> pydev.blogspot.com



From Domenique.Tilleuil at gmail.com  Thu Apr 21 13:14:29 2005
From: Domenique.Tilleuil at gmail.com (Domenique.Tilleuil at gmail.com)
Date: 21 Apr 2005 10:14:29 -0700
Subject: pyGTK on Mouse over event ?
In-Reply-To: <1114075607.747353.74180@o13g2000cwo.googlegroups.com>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
	<4266baf3$0$7208$626a14ce@news.free.fr>
	<1114029300.082094.293410@g14g2000cwa.googlegroups.com>
	<4266ce05$0$7200$626a14ce@news.free.fr>
	<1114075607.747353.74180@o13g2000cwo.googlegroups.com>
Message-ID: <1114103669.848277.188150@o13g2000cwo.googlegroups.com>

I've managed to get it all working !

I've used an Image inside an eventBox and used the motion notify event.
The trick was to add the Events in the Common tab of the Glade property
editor. Those where the MASK's you where talking about. Anyway, now it
works just fine :) Thx for the information and for pushing me into the
right direction :)



From chris at angband.org  Thu Apr 21 08:34:38 2005
From: chris at angband.org (Operation Latte Thunder)
Date: Thu, 21 Apr 2005 12:34:38 +0000 (UTC)
Subject: freeze and expat
Message-ID: <d486ku$gob$1@news-int.gatech.edu>

I am playing around with jabberpy, and on a lark decided to try to freeze
one of the included samples, test_client.py

The freeze/build worked fine, but when I attempted to run the resulting
binary, I got an error hinting that it couldn't find parsers.expat:

canal:/home/chris/build% ./test_client
Traceback (most recent call last):
  File "/home/chris/build/../test_client.py", line 15, in ?
    import jabber
  File "/usr/lib/python2.3/site-packages/jabber.py", line 67, in ?
    import xmlstream
  File "/usr/lib/python2.3/site-packages/xmlstream.py", line 36, in ?
    import xml.parsers.expat
ImportError: No module named parsers.expat

I have tried this with python2.3.5 and 2.4.1, and played around with the -m
option on the freeze cmd line, but no joy.  Google seems to delight in
frustating me...

In a much simpler case than the test_client.py, the following also fails:

import xml.parsers.expat
print "Hello world"

Though it runs from the interpreter... ideas?

-- 
chris at acheris.net			|             Roma Invicta!


From gsakkis at rutgers.edu  Tue Apr  5 13:47:35 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 5 Apr 2005 10:47:35 -0700
Subject: Testing threading
Message-ID: <1112723255.126565.290450@o13g2000cwo.googlegroups.com>

How one goes on testing a threaded program, apart from doing a few
successful runs and crossing his fingers that it at least follows the
'correct 99.9999% of the time' rule ? I've written a stripped-down
python version of Doug Lea's PooledExecutor thread pool class
(http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/PooledExecutor.html),
I ran a few simple examples that seem to work as expected, but I still
wouldn't bet any serious amount on its correctness. Any general, or
specific to this problem, tesing guidelines ?

As for the 'stripped-down version', it refers to the lack of shutting
down facilities. These are based on interrupting a thread and AFAIK
this is not possible in python, is it ?

On the other hand, in addition to the main execute(command) method of
the original PooledExecutor, I added a new dispatch(callables)
generator method. This takes an iterable over zero-argument callables,
it dispatches them to separate threads according to the thread pool's
configuration (minPoolSize,maxPoolSize,etc.), collects the results in a
queue as they are computed and yields them back to the caller. Since
the order of the computed results is not in general the same with the
order of the input, the yielded items are tuples (i,result), where i is
the index of the respective callable that returned this result. As a
toy example:

from math import sqrt
from itertools import count
tasks = (lambda x=n: sqrt(x) for n in count())
pool = PooledExecutor(minPoolSize=4)
for n,s in pool.dispatch(tasks):
    print "The square root of %d is %s" % (n,s)


George



From rupole at hotmail.com  Thu Apr 28 07:16:32 2005
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 28 Apr 2005 07:16:32 -0400
Subject: Internet Explorer, COM+, Javascript and Python
References: <1114609311.916761.272980@f14g2000cwb.googlegroups.com>
Message-ID: <4270c6ed$1_2@127.0.0.1>

Something like this should be close:

import win32com.client, pythoncom
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
ie.Navigate('somepagewithjavascript.html')
id=ie.Document.Script._oleobj_.GetIDsOfNames('somejsfunction')
res=ie.Document.Script._oleobj_.Invoke(id, 0, pythoncom.DISPATCH_METHOD, 
True, <parameter or tuple of parameters> )

   hth
       Roger


"Ishpeck" <ishpeck at gmail.com> wrote in message 
news:1114609311.916761.272980 at f14g2000cwb.googlegroups.com...
>I need to make IE execute javascript in a web page with COM+ and
> Python.
>
> Similarly to the way they do it in this article. . .
>
> http://www.codeproject.com/com/jscalls.asp
> 



----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From cookedm at physics.mcmaster.ca  Tue Apr 12 16:57:16 2005
From: cookedm at physics.mcmaster.ca (David M. Cooke)
Date: Tue, 12 Apr 2005 16:57:16 -0400
Subject: python/svn issues....
In-Reply-To: <003101c53f9a$d164e110$0301a8c0@Mesa.com>
	(bedouglas@earthlink.net's
	message of "Tue, 12 Apr 2005 13:04:19 -0700")
References: <003101c53f9a$d164e110$0301a8c0@Mesa.com>
Message-ID: <qnkll7nyaqb.fsf@arbutus.physics.mcmaster.ca>

"bruce" <bedouglas at earthlink.net> writes:

> david...
>
> thanks for the reply...
>
> it's starting to look as though the actual /usr/lib/libdb-4.2.so from the
> rpm isn't exporting any of the symbols...
>
> when i do:
> nm /usr/lib/libdb-4.2.so | grep db_create
>
> i get
>  nm: /usr/lib/libdb-4.2.so: no symbols
>
> which is strange... because i should be getting the db_create symbol...
>
> i'll try to build berkeley db by hand and see what i get...
>
> if you could try the 'nm' command against your berkely.. i'd appreciate you
> letting me know what you get..

Not surprising; plain 'nm' doesn't work for me on shared libraries. I
need to use 'nm -D'. In that case, I get a db_create (or rather, a
versioned form, db_create_4002). Running 'nm -D -g' on the
libsvn_fs_base library shows it uses the same db_create_4002 function.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke                      http://arbutus.physics.mcmaster.ca/dmc/
|cookedm at physics.mcmaster.ca


From jerf at jerf.org  Fri Apr  1 16:52:52 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 16:52:52 -0500
Subject: decorator syntax polling suggestion
References: <d11dcfba.0408121252.7690a43a@posting.google.com>
	<411BF3FC.71051A6F@alcyone.com>
	<CISdnRfssu4lrIHcRVn-ow@powergate.ca>
	<mailman.1588.1092379795.5135.python-list@python.org>
Message-ID: <pan.2004.08.13.20.15.22.544894@jerf.org>

On Fri, 13 Aug 2004 16:49:53 +1000, Anthony Baxter wrote:
> The
> people who hate pie-decorators post a _lot_ - most people seem to either
> not care, or else post once or twice and then disappear.

I just posted on another mailing list about how posting the same message,
over and over, is fundamentally offensive; it implies the belief, from
whatever the source, that the poster needs to "show you the light" and if
they just keep pounding on it, they'll eventually blast through your
ignorance. People who internalize this will not look loud in a debate, so
it is important to not just look at volume. 

(My call: Hated it at first, waded through the arguments and alternatives,
now agree with the syntax as is.)


From postmaster at castleamber.com  Wed Apr 20 16:23:34 2005
From: postmaster at castleamber.com (John Bokma)
Date: 20 Apr 2005 20:23:34 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
Message-ID: <Xns963E9C45A3C66castleamber@130.133.1.4>

Reinhold Birkenfeld wrote:

> John Bokma wrote:
>> Mage wrote:
>> 
>>> praba kar wrote:
>>> 
>>>>Dear All,
>>>>
>>>>   In Python what is equivalent to goto statement
>>>>
>>>>  
>>>>
>>> You shouldn't use goto in high-level languages.
>> 
>> Nonsense
> 
> Thank you!
> 
> Above all your claim is well justified.

You are probably smart enough to think of several situations that 
justify the use of a goto (or something that is a goto in disguise, like 
an early return in a function, a break or a continue, or a switch).

One can abuse a goto in any language, like every other language 
construction. But don't make it a "shouldn't" like a law.

Some people take Dijkstra too serious. Learn to think for yourself, I am 
sure he did.

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


From http  Thu Apr 21 22:17:24 2005
From: http (Paul Rubin)
Date: 21 Apr 2005 19:17:24 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>
	<1114109221.149346.64850@z14g2000cwz.googlegroups.com>
	<1114135601.328421.165760@z14g2000cwz.googlegroups.com>
Message-ID: <7xekd3v9l7.fsf@ruckus.brouhaha.com>

beliavsky at aol.com writes:
> > Suppose you could.  Then what should
> > ([3, 1, 4] indexbase 0) + ([1, 5, 9] indexbase 4)
> > equal?

> If + means add, the result would be ([4,6,13] indexbase 0) .

That's counterintuitive.  I'd expect c = a + b to result in c[i] =
a[i]+b[i] for all elements.  So, for example,
   ([0,1,2,3,4] indexbase 0) + ([2,3] indexbase 2)
should result in ([0,1,4,6,4] indexbase 0)
and ([3, 1, 4] indexbase 0) + ([1, 5, 9] indexbase 4)
should either result in ([3,1,4,0,1,5,9] indexbase 0) or
else raise an exception.


From michele.simionato at gmail.com  Tue Apr 12 11:00:42 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Apr 2005 08:00:42 -0700
Subject: singleton objects with decorators
In-Reply-To: <d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
	<d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1113318042.836605.132820@o13g2000cwo.googlegroups.com>

I did not put memoize on __new__. I put it on the metaclass __call__.
Here is my memoize:

 def memoize(func):
     memoize_dic = {}
     def wrapped_func(*args):
         if args in memoize_dic:
             return memoize_dic[args]
         else:
             result = func(*args)
             memoize_dic[args] = result
             return result
     wrapped_func.__name__ = func.__name__
     wrapped_func.__doc__ = func.__doc__
     wrapped_func.__dict__ = func.__dict__
     return wrapped_func

 class Memoize(type): # Singleton is a special case of Memoize
     @memoize
     def __call__(cls, *args):
         return super(Memoize, cls).__call__(*args)



From steve at holdenweb.com  Fri Apr  8 11:26:58 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 11:26:58 -0400
Subject: Interpreter problem
In-Reply-To: <d365ha$h33$1@solaris.cc.vt.edu>
References: <425684F8.5060507@novasyshealth.com>	<mailman.1538.1112970334.1799.python-list@python.org>
	<d365ha$h33$1@solaris.cc.vt.edu>
Message-ID: <d367mu$1q3$1@sea.gmane.org>

rbt wrote:
> Steve Holden wrote:
> 
>> Greg Lindstrom wrote:
>>
>>> I am using python 2.3.5 on a Linux system and have an odd problem 
>>> dealing with the 'sha-bang' line.  I have a file, driver.py which 
>>> starts with
>>>
>>> #!/usr/bin/python
>>>
>>> and works fine (that is, when I type in ./driver.py at the command 
>>> prompt the file runs as expected).  I have another file, 
>>> myotherfile.py which starts with the exact same line 
>>> (#!/usr/bin/python) but I get
>>>
>>> : bad interpreter: No such file or directory
>>>
>> There's almost certainly a carriage return as well as a newline in the 
>> shebang line.
>>
>> [...]
>>
>> regards
>>  Steve
> 
> 
> Not so. I get the same result with python 2.3 and 2.4 on Debian Linux 
> Testing. Nothing odd at all in the shebang.

What, you are telling me you've checked the file with a command like

   head driver.py | od -bc

and verified the absence of any extraneous characters?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From mwm at mired.org  Mon Apr 25 18:28:11 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 17:28:11 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
Message-ID: <86mzrmo5j8.fsf@guru.mired.org>

John Bokma <john at castleamber.com> writes:

> Mike Meyer wrote:
>
>> John Bokma <postmaster at castleamber.com> writes:
>>> Mike Meyer wrote:
>
> [ snip ]
>
>>> do you really think that for / foreach and things like if / unless
>>> bloat a language processor? I think you take your "pure programming
>>> lanuage" way to far, and really don't understand your choice of
>>> Python in your crusade.
>> 
>> I don't think I take it to far. All my experience dealing with
>> languages that took the opposite tack (i.e. - Perl and Common LISP)
>> demonstrate that such things are a bad idea.
>
> Funny, quite a lot of Perl programmers consider using unless instead of 
> if ! a good idea. And if a programmer is not able to grasp the meaning 
> of unless if he sees it the first time, he should be able to look it up. 
> And if a programmer says that it burdens his mental processes, or slows 
> him down, I hope I never have to work with him/her and/or maintain 
> his/her code.

Yeah - unless is a bad idea. If that were the only such problem in
Perl, it wouldn't be a problem. Unfortnately, it's a symptom of the
design philosphy of the language.

>>>> and increases the semantic load on
>>>> the programmer. The best the programmer can do, as you imply, is to
>>>> ignore the extraneous methods.
>>> I am curious of a list of extraneous methods in Perl (more about the 
>>> size by the way)
>> Methods isn't a very good word choice on my part, as it has to many
>> meanings. But saying "extraneous ways to do it" is a bit wordy. I
>> already gave you one such list, covering just the syntactic elements
>> of the language.
> I must have missed it, since I didn't see it.

Um - you commented on it.

>>> A poorly skilled programmer has to puzzle about a lot of more things.
>>> Or you think list comprehension (sp?) and all the tricks with it are
>>> clear? or the and or trick? I just had a glance on Python, but what
>>> probably to you is one clear path isn't clear to me yet. And I doubt
>>> that can all be blamed on unpure new Python.
>> Correct - newbies have to puzzle about a lot of things. A good
>> language design won't add to that set of things without a good
>> reason. Adding features because you can is adding things to puzzle
>> about without a good reason.
> I doubt that features have been added to Perl just because. Even ones 
> that look like it, unless for example, have an excellent use, it makes 
> the code more readable.

Then why do most Perl programmers consider unless "! a good idea"? No,
things were added to Perl so there would be more than one way to do
them - which is even *worse* than adding them without a good reason.

>>>> No, one I blew. One you still got wrong.
>>> Which one?
>> 
>> Faling to put in the parens that would have distinguished the argument
>> lists from the list of operators.
>
> *sigh* you gave a list of problems, I replied by putting all answers on 
> one line, with () around them, and commas between them. I was not 
> constructing a tuple, or a list in Perl 

Right. You were constructing something for humans to read - and
managed to construct something that was a PITA to read. If you'd made
the oher choice, it wouldn't have been a PITA to read.

>> Actually, it's not clear the grep was right either. The return value
>> of grep (and map) isn't always the right thing.
> If you want to have a list of results and you assign it to a scalar, you 
> are doing the wrong thing.

And what if you do something with it other than assign it to a
variable?

You're right - the assignment is doing something wrong. A good
language would catch things at that point and let the programmer know
about it, so you get notified of the bug at the location of the
bug. Python doesn't do this any better, though.

> But the bottom line is: I gave you answers to all, except one, of your 
> problems, you think my set of answers is a kind of Perl list, you 
> thought the grep was plainly wrong, and I guess you are not comfortable 
> with split.

I thought your answer was a kind of list, but the syntax you chose
made it completely unclear where each item ended, because you
overloaded the "," character to seperate arguments to functions in the
list as well as to separate items in the list. Choosing the other
option would have grouped the arguments, and made things clear. And
yes, I consider the Perl split atrocious.

> And this gives me the feeling that you either haven't been using Perl 
> for over 4 years, or was never got beyond the absolute beginner level. 
> In the latter case I can imagine that you are overwhelmed by Perl. As 
> would one by any language.

I'll admit it's been a while since I did anything other than
debugging. I haven't had much call to do the things that Perl is
really good at (simple re-heavy scripts), so I haven't done much
development in it.

You may be overwhelmed by any language. I'm not. The only one that
ever overwhelmed me was Common LISP. It looks like Perl 6 would, if I
ever bothered to learn it - because it's going to be bigger than
Common LISP.


>>>>> If I could have a peek at the Perl code you maintained I could tell
>>>>> you (often by just seeing 3-5 lines) the status of the programmer
>>>>> who wrote it :-)
>>>> So you'd either say you were wrong, or that my second contention was
>>>> right. Either one would be a bad side effect of TMTOWTDI.
>>> I am right, and you are wrong ;-)
>> In which case, I'm right in claiming that having more than one way to
>> do things fragments the community - which is *still* a bad thing for
>> the people writing the language.
> It fragments it in a way every programming community is fragmented: 
> absoluut beginner, beginner, junior, senior, guru. 

It also fragments along subsets of the language, which is the bad thing.

>>> ARM assembly, told you ;-)
>> 
>> That's not a coverage. Unless ARM assembly includes garbage
>> collection, dictionaries and similar things.
>
> In a pure language such things are in the library.

So, where's the ARM assemblly library that includes dictionaries?

>>> Easier, sure. But does it turn beginners in rock solid programmers?
>> It means they never make errors like using free'd memory, or failing
>> to free allocated memory. So in that since, yes, they are rock solid.
> LOL, but they will make other mistakes. Otherwise, I am really curious, 
> can you show a publication that shows that the number of bugs / 
> application is much smaller when a garbage collection language is used, 
> and one that does bounds checking?

Of course they'll make other mistakes. No programmer is perfect.  I
already pointed out the LISP study on garbage collection. Bounds
checking doesn't prevent mistakes, it just makes them easier to find
by causing an error report at the point the bug occured, instead of at
some point in the future.

>>> So they looked close at one aspect of the language. But you think
>>> that 10k lines of, say Java, has less bugs then 10k lines of C?
>> Nah. Then again, counting lines of code is a silly thing to do. You
>> think 10K lines of C does as much as 10K lines of Java?
> Depends of course, but rephrase: we take 10 programs of C, 10 of Java, 
> each which are equal (except in the number of bugs). You think Java has 
> less?

If they have the same functionality, then yes, I think the java will
have fewer bugs, because it will have fewer lines of code.

>> The crucial
>> question isn't how many bugs you get per line of code, it's how many
>> bugs you get to achieve a given functionality. You can improve this
>> number by cutting down the number of bugs per line of code, or by
>> cutting down the number of lines of code needed to acheive a given
>> functionality. Modern programming environments clearly improve the
>> latter.
> But are there now less bugs compared to a few years ago? Are, say, Java 
> programs in general more bug free? 

No, because programs do more things than they did a few years ago.

>>> And I am sure that you fixed enough bugs in the same *real* programs 
>>> that were in no way related to this. I have fixed enough bugs in
>>> Perl, Java, etc, to know that "life will find a way", so to speak.
>> We both agree you're always going to have bugs. I think that
>> programming languages designed to eliminate whole classes of bugs are
>> good thing, because bugs are a bad thing. You seem to argue that
>> because we can't elimnate all bugs, we shouldn't eliminate any. That's
>> simply silly.
> Nope, I got the impression from you that Python restricts programmers, 
> so they make less mistakes. They can't make mistakes of "whole classes", 
> but that doesn't mean they are suddenly good programmers.

Python doesn't restrict programmers. Python is one of the *least*
restrictive languages I know. It eliminates certain classes of bugs by
providing well-designed facilities in lieue of older facilities, but
that's not a restriction. And that's not a unique to Python,
either. Most modern languages share those facilities.

> If I considered garbage collection bad, I would say so. But like airbags 
> doesn't improve the driving skills of someone, so doesn't all kind of 
> restrictions turn bad programmers suddenly in good programmers.

You keep harping on restrictions. Garbage collection isn't a
restriction. It's a feature. It replaces the explicit alloc/free found
in older languages. Since good language design calls for one way to do
things, you lose the older, more bug-prone facility. After all, it now
contributes nothing to the language. No restriction at all.

As I said before, I hate restrictions. Restrictions hamper
programmers.

> Moreover, good programmers rarely need to be restricted. But I don't see 
> garbage collection as an anti-memory-leak restriction (which it can't be 
> in all cases) but as a time saver.

I think garbage collection is a time saver as well. It saves me time
hunting bugs caused by incorrect usage of the facilities it
replaced. It may save a little time in not having to write explicit
deallocation instructions, but that's trivial.

>>> What makes you think there are isolated communities?
>> Let's see. LISP - some of the communities were MacLISP, InterLISP,
>> Zeta LISP, and Standard LISP. There are certainly others I
>> forgot. Perl - they don't have names, they just show up in the code I
>> have to maintain.
> But is that because there are separate communities, or because there are 
> different skill levels? Moreover, I hope that "have to maintain" was 
> "had to maintain (some time ago)", because your Perl skills are more 
> than lacking.

No, unfortunately I still have to maintain Perl code.

Ok, so it's only the skill level of the programmers that's the cause
of the changes. So why does the language offer bad choices to the
programmers? That's as silly as a language having garbage collection
and alloc/free. Good programmers won't use the latter. Bad ones will,
just because it's there.

>>> How long haven't you been in touch with Perl? 
>> Oh, are you claiming that PERL ships with HTML and XML parsers, SMTP
>> clients and web servers in the standard library?
> Which Perl? ActiveState Perl does indeed come with HTML, and XML 
> parsers, SMTP, etc, clients. Web server(s), I have no idea, haven't 
> needed a Perl webserver, I doubt it comes with AS Perl.

Sure, anyone can bundle whatever they want up as a distribution, but
that doesn't mean those things are part of the base library. The
original contention which caused your reaction was that Python came
with a larger base library than Perl does. It seems that this claim is
still true even if you use the ActiveState distribution of Perl.

>> That's odd - all the
>> packages I see seem to want to install those things from CPAN.
> Is there such a centralized place for libraries for Python?

Unfortunately, no. PyPI is the one linked to from the web site. It
doesn't have CPAN's auto-install capabilities

>>> I use either for or while. 
>> You never use the Perl foreach loop? That doesn't sound like a skilled
>> Perl programmer to me.
> I already stated you have little Perl experience. Now I have to change 
> that to *extremely* little Perl experience.
> So it seems I am right: the overwhelming effect of "many ways" is mainly 
> seen by absolute beginners, who are able to make up many ways, even if 
> there is just one or two :-D.

Are you afraid to answer the question? Do you or do you not use the
"foreach" loop in perl? Until you do, I can't know why my asking that
question makes you call my perl experience into question.

Is it because only an idiot would never use the foreach loop? I
agree. Which is why I find your claim not to use it ludicruous.

Is it because only an idiot would use the foreach loop? If so, please
back that up by telling me what's wrong with the foreach loop.

>>> How did you measure this? And which distribution of Perl are you
>>> talking about?
>> 
>> By looking at the functionality installed programs used from third
>> parties (i.e. - CPAN in recent version) vs. what they used from the
>> standard library. And in Perl 4 and 5.
> Perl 4? Even Perl 5 is almost 11 years old. Which version of Perl 5 are 
> you talking about?

Yup - I was using Perl back when it was at version 3. The currently
installed Perl is 5.8.5.

>>>> Right - Perl makes writing ugly,
>>> Nope, the programmer does that.
>> No, the programme writes the ugly code. Perl makes it easy.
> So, and who is to blame? Would you trust a programmer who can only write 
> code in a certain way because he is restricted by the langauge to do so? 

Which would you trust more - a programmer who had to unlearn all his
bad habits, or one who never had the chance to develop them?

> And do you really think his/her code would be better compared to a 
> skilled programmer?

No, I don't think it would be better. I don't think it would be as
good. I never claimed any of those things - I claimed that code
written in a TOOWTDI language is more maintainable than code written
in a TMTOWTDI language.

>>> And I think that there is the main problem in your whole story. You 
>>> think this is a quest for superiority. It isn't.
>> What? You're not trying to find the superior tool for the application
>> domain? Then what *are* you doing?
> Programming, in a skilled way. There is no ultimate superior tool. Why 
> do you think I am learning Python? Because I found the holy grail? Or 
> that I just want another way to do things?

Of course there's no holy grail, just as there's no silver
bullet. However, languages can be compared as to their suitability for
an application domain, and I try to chose the superior language for
each application domain. At one point, I did a lot of work in
application domains for which Perl was a good choice. That simply
isn't true any more.

>>> But if this all bothers you *this* much, I am afraid that the problem
>>> is really behind the keyboard :-)
>> No, what bothers me *this* much is that every time I have to maintain
>> a Perl program, I have to learn somebody else's subset/idioms/etc of
>> the language. "All this" is the cause of that.
> No. If this was crossposted in a Perl group, by now quite a lot of 
> people would have pointed you out, probably in a less nice way, that 
> your Perl skills are of a person who hasn't even gone beyond the first 
> few chapters of "Learning Perl". 

Oh, bullshit. I admit my perl skills are rusty - that comes from
having found a language that is superior to it across a large
collection of problem domains. I never read "Learning Perl". It didnt'
exist when I learned Perl.

Even if it is true, the point still stands - Perl programs are less
maintainable than Python programs. I maintain that the difference in
philosphy on the number of ways to do things is a cause for that.

>>> Yup, to pick a tool out of a organized toolbox. Which is fine if
>>> that's the only job involved. Programming, or as I see it, is not
>>> about picking tools out of a box, but combining them.
>> 
>> Right. A good language will have an obvious tool for each part of the
>> combination, so you don't spend time worrying about picking the right
>> tools - the right choices are obvious. A bad language will have more
>> than one tool for many parts of the combination, so you wind up
>> wasting time on which of n interchangable tools is the right one
>> instead of actually solving the problem at hand.
>
> And a bad programmer will go at great length explaining how bad the 
> tools are, because he has to learn them :-D

A good programmer will compare the toolset to others he's familiar
with, and choose the toolset that is best for the jobs he does. An
evangelical programmer will then spend a lot of effort explaining why
one toolset is better than another.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From marten.hedman at btk.utu.fi  Mon Apr  4 07:04:43 2005
From: marten.hedman at btk.utu.fi (Marten Hedman)
Date: Mon, 04 Apr 2005 14:04:43 +0300
Subject: Sending keytrokes to Windows app
Message-ID: <42511F4B.40702@btk.utu.fi>

Hello,

I am trying to control a Windows application from a python script with 
SendKeys and Python 2.3. My problem is that the characters ':' and '\' 
are sent to the application as ';' and '+'. See code example below.

I suspect that the problem has to do with the regional and keyboard 
settings in Windows. I am using the setting English (UK) with Finnish 
keyboard. If I change the settings to English (US) with US keyboard, 
everything works fine.

Is there a way to either change the language and keyboard settings from 
my python script, or get Sendkeys to send the characters correctly? Or 
should I use another way to send the keystrokes to the application?

Transcript of Python session:

Python 2.3.5 (#62, Feb  8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import SendKeys
 >>> a='C:\\'
 >>> SendKeys.SendKeys(a)
 >>> C;+

Thank's in advance

Marten Hedman
Turku Centre for Biotechnology
Turku, Finland


From Scott.Daniels at Acm.Org  Sat Apr 23 11:00:11 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 23 Apr 2005 08:00:11 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <mailman.2339.1114242211.1799.python-list@python.org>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>	<mailman.2320.1114211454.1799.python-list@python.org>	<42698692$1@nntp0.pdx.net>
	<mailman.2339.1114242211.1799.python-list@python.org>
Message-ID: <426a5d32$1@nntp0.pdx.net>

Mage wrote:
> Scott David Daniels wrote:
>>
>>See, the body of your anonymous function just looks for "the current
>>value of n" when it is _invoked_, not when it is _defined_.
> 
> The "lambda functions" was an unclear part of the tutorial I read.
> Should I use them? Are they pythonic?
> As far I see they are good only for type less a bit.

As for most python features which are not "dead obvious", you should
only use them where they they make the code clearer than it would be
without the use of that feature.  In this case, I was responding to
a particular use of lambda which, in fact, had a flaw that made the
code do something different from what it looked like it was doing.
I felt the distinction was clearer in the lambda form than it would
have been with "def-style" function definitions.  One of the reasons
the distinction came out was that there was no confusing naming of
"what this function means," only program structure.  In a real program
that is a hindrance.  In the case of pointing out a flaw, it makes
differences between two versions of some code more obvious.

--Scott David Daniels
Scott.Daniels at Acm.Org


From deetsNOSPAM at web.de  Sat Apr 30 09:34:48 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 30 Apr 2005 15:34:48 +0200
Subject: interactive web graphics
References: <mailman.44.1114808122.14961.python-list@python.org>
Message-ID: <d501hp$78u$04$1@news.t-online.com>

> 
> I'm surprised that Trolltech is allowing Microsoft to get their product
> for free. 

If the free version is used, it's license is GPL. So for commercial apps,
you still need a license (for linux as well)

> I have played with Qt3 somewhat; not sure how their widgetry 
> compares with GTK+, as far as looks are concerned, but much prefer C++.
> Disappointingly, the openGL module for QT failed to work when I ran the
> examples.  I hear VTK is nice. Just checked Google and, sure enough,
> there's a pyVTK.

Dunno why that happened - Qt certainly has gl support.

-- 
Regards,

Diez B. Roggisch


From kartic.krishnamurthy at gmail.com  Tue Apr  5 14:32:52 2005
From: kartic.krishnamurthy at gmail.com (Kartic)
Date: 5 Apr 2005 11:32:52 -0700
Subject: ANN : Columbus OH Meetup Group
Message-ID: <1112725972.666950.72400@o13g2000cwo.googlegroups.com>

Announcing the creation of a Columbus/Dublin Ohio Meetup group.

http://python.meetup.com/161/

Hope to see Pythonistas from the Columbus/Dublin areas, and vicinity,
sign up for this group and enrich our collective Python experience!

Thanks,
--Kartic



From caneff at gmail.com  Wed Apr  6 12:46:07 2005
From: caneff at gmail.com (ChinStrap)
Date: 6 Apr 2005 09:46:07 -0700
Subject: Best editor?
In-Reply-To: <mailman.1437.1112801727.1799.python-list@python.org>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<xqxll7wougu.fsf@cola2.ca.boeing.com>
	<mailman.1437.1112801727.1799.python-list@python.org>
Message-ID: <1112805967.208689.96100@o13g2000cwo.googlegroups.com>

Well I would be more than willing to learn Emacs if it does all these
things you speak of, but really I can't get started because the default
scheme is so friggin ugly it isn't funny.

Anyone want to send me a configuration setup with Python in mind, and
decent colors?



From richardblackwood at cloudthunder.com  Sat Apr 23 23:23:42 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sat, 23 Apr 2005 23:23:42 -0400
Subject: Variables
In-Reply-To: <ZMydnQbLxdM9jfbfRVn-hg@comcast.com>
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>
	<ZMydnQbLxdM9jfbfRVn-hg@comcast.com>
Message-ID: <426B113E.5070105@cloudthunder.com>

Steven Bethard wrote:

> Richard Blackwood wrote:
>
>> Indeed, this language is math. My friend says that foo is a constant 
>> and necessarily not a variable. If I had written foo = raw_input(), 
>> he would say that foo is a variable.
>
>
> Then what does he say if you write:
>
> foo = 5
> foo = 6
>
> ?
>
> STeVe

He says that foo is a constant. At first it was a constant which equaled 
5, then it was a constant that equaled 6.


From dmbkiwi at gmail.com  Tue Apr 26 22:11:37 2005
From: dmbkiwi at gmail.com (dmbkiwi at gmail.com)
Date: 26 Apr 2005 19:11:37 -0700
Subject: kdialog and unicode
In-Reply-To: <d4mep6$u11$05$1@news.t-online.com>
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
	<8d7dabda.0504261239.37952804@posting.google.com>
	<d4mep6$u11$05$1@news.t-online.com>
Message-ID: <1114567897.304650.271330@l41g2000cwc.googlegroups.com>


Peter Otten wrote:
> dumbkiwi wrote:
>
> > I'd be interested to see what your default encoding is,
>
> ascii
>
> > and why your output was different.
>
> If only I knew.
>
> > Anyway, from your post, I've done some more digging, and found the
> > command:
> >
> > sys.setappdefaultencoding()
>
> That is an alias for sys.setdefaultencoding() created by your IDE
(Eric),
> and therefore may not always be available.
>
> Peter

Hmmm.  That's disappointing.  I've also discovered that you can do:

import sys
reload(sys)

and then get access to sys.setdefaultencoding().

Will that get me into trouble?

Matt



From mahs at telcopartners.com  Fri Apr  8 13:51:47 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 08 Apr 2005 10:51:47 -0700
Subject: curious problem with large numbers
In-Reply-To: <4256a676@nntp0.pdx.net>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>	<mailman.1517.1112938969.1799.python-list@python.org>
	<4256a676@nntp0.pdx.net>
Message-ID: <d36g62$1bi$1@sea.gmane.org>

Scott David Daniels wrote:
> Steve Holden wrote:
> 
>> Scott David Daniels wrote:
>>
>>> Terry Reedy wrote:
>>>
>>>> On my Windows machine with 2.2.1, I get exactly what you expected:
>>>>
>>>>>>> 1e10000
>>>>
>>>>
>>>> 1.#INF
>>>> ...
>>>> If you get wrong behavior on a later version, then a bug has been 
>>>> introduced somewhere, even perhaps in VC 7, used for 2.4.
>>>
>>>
>>> Nope, it is also there for 2.3.4 (May 25 2004, 21:17:02)....
>>
>>
>> A further Windows data point from Cygwin:
>>
>> Python 2.4 (#1, Dec  4 2004, 20:10:33)
>> [GCC 3.3.3 (cygwin special)] on cygwin
>> Type "help", "copyright", "credits" or "license" for more information.
>>  >>> 1e10000
>> Inf
>>  >>>
>>
>> regards
>>  Steve
> 
> 
> Aha! Same version (2.3.4):
> 
> Idle:
>     >>> 1e10000
>     1.0
>     >>> import struct; struct.pack('d', 1e10000)
>     '\x00\x00\x00\x00\x00\x00\xf0?'
> (which is actually 1.0)
> 
> python via command line (readline support):
>     >>> 1e10000
>     1.#INF
>     >>> import struct; struct.pack('d', 1e10000)
>     '\x00\x00\x00\x00\x00\x00\xf0\x7f'
> 
> Note the difference in the final byte.  Same results (command
> line vs. Idle) for 2.4.1.
Good catch!  Same for me:

Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.

...

IDLE 1.1
 >>> 1e10000
1.0

and note this happens only at the IDLE interactive interpreter:
  >>> import testidleinf
1.#INF
(where testidleinf is "print 1e10000")

On a quick inspection, it seems that IDLE just passes the input to 
code.InteractiveInterpreter (after removing tabs and normalizing EOL), but 
calling code.InteractiveInterpreter directly does not reproduce the error...

(still in IDLE at the interactive prompt):

  >>> from code import InteractiveInterpreter
  >>> II = InteractiveInterpreter()
  >>> II.runsource("1e10000")
1.#INF
  False
  >>>

hmmm...

Michael






From jepler at unpythonic.net  Tue Apr 19 12:32:39 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 19 Apr 2005 11:32:39 -0500
Subject: fpectl
In-Reply-To: <1113900597.167410.91470@z14g2000cwz.googlegroups.com>
References: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
	<mailman.2071.1113869781.1799.python-list@python.org>
	<1113900597.167410.91470@z14g2000cwz.googlegroups.com>
Message-ID: <20050419163236.GA610@unpythonic.net>

On Tue, Apr 19, 2005 at 02:05:11AM -0700, S?bastien Boisg?rault wrote:
> Thanks for this answer.
> 
> Did you forward this info to python-dev ?

I created a patch on the sf tracker.  It's been responded to by several
developers.  You can read what they said there.

http://python.org/sf/1185529

Jeff
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From jstroud at mbi.ucla.edu  Mon Apr 25 23:53:16 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 25 Apr 2005 20:53:16 -0700
Subject: key binding with mac
In-Reply-To: <Ztibe.1433$zu.846@newssvr13.news.prodigy.com>
References: <Ztibe.1433$zu.846@newssvr13.news.prodigy.com>
Message-ID: <200504252053.16665.jstroud@mbi.ucla.edu>

If I remember correctly, the Mac OS X python (circa OS X 10.3.2) had this 
"probelm". I'm not sure about the state of affairs now--I'm doing Linux only 
these days so I'm kind of out of touch with the Mac scene. I installed the 
one from fink (fink.sf.net) and used that. Well worth your time and you will 
learn a little getting everything set up. You can also build it the hard way 
by downloading everything from Python, Tcl/Tk, etc., and using the dev-tools 
compilers. Lots of learning there, and lots of fun if you are a masochist.

On Monday 25 April 2005 08:22 pm, so sayeth Eric Texier:
> I am just starting to use python on the mac.
> How do I get backspace, the arrows up/down and all the control like
> ctrl-a to work nicely under the console.
> for now I am getting a bunch of ^? ^[[A when I use any tcsh type of
> control.
> thanks,

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

http://www.jamesstroud.com/


From nemesis at nowhere.invalid  Sun Apr 24 14:06:15 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Sun, 24 Apr 2005 18:06:15 GMT
Subject: filename used by shelve
Message-ID: <20050424180725.3658.6265.XPN@orion.homeinvalid>

In the python docs about shelve module I read:

-----------------------------------------------------------------------------
 open( filename[,flag='c'[,protocol=None[,writeback=False[,binary=None]]]])
    Open a persistent dictionary. The filename specified is the base filename 
    for the underlying database. As a side-effect, an extension may be
    added to the filename and more than one file may be created.
-----------------------------------------------------------------------------

So the real filename may be different from the argument passed to
"open". I have this problem, I want to delete (in some circustances) the
file created by shelve.open, how can I know which is the name of this
file (or files) ?

-- 
I'm not a complete idiot - several parts are missing.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From thomasadunham at yahoo.co.uk  Mon Apr 18 15:32:35 2005
From: thomasadunham at yahoo.co.uk (thomasadunham at yahoo.co.uk)
Date: 18 Apr 2005 12:32:35 -0700
Subject: Parse command line options
References: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>
Message-ID: <1113852755.870067.178530@o13g2000cwo.googlegroups.com>

Hue,
It looks like you may have options and arguments confused. Arguments
are the pieces of information that your program needs to run. Options
are used to tune the behaviour of your program.

For example:
grep -i foo bar
Tries to match the expression "foo" in the file "bar", ignoring the
case of the letters. The grep program needs to know what expression to
look for and where to look, so "foo" and "bar" are arguments. Ignoring
the case of the letters is tuning the behaviour of the grep program -
in this case making it less sensitive. The program will run without it.


If your task is :
python  MyScriptName.py  n  t  h  i  o
Then n, t, h, i and o are arguments. You can get them from the args
array:

import sys
print ",".join(sys.argv)

would print "n, t, h, i, o"

If you are using options, you must put dashes before them, and they
must be before the arguments. So, if this was hue.py:

import sys
import string
import getopt

def usage():
    print '''haarp_make.py -- uses getopt to recognize options

Options: -n  -- No
         -t  -- Time
         -h  -- help
         -i  -- image_file
         -o  -- Output:filename'''

    sys.exit(1)

def main():

    print "SYS ARGV: ", ",".join(sys.argv)
    try:

        opts,args = getopt.getopt(sys.argv[1:], 'n:t:h:i:o:',
["Number=","time=","help=","image_file=","Output Filename="])

    except getopt.GetoptError:
        print 'Unrecognized argument or option'
        usage()
        sys.exit(0)

    print "OPTS: ", ",".join([repr(o) for o in opts])
    print "ARGS: ", ",".join(args)

if __name__ == "__main__":
    main()


Then:
C:\temp>python hue.py n  t  h  i  o
SYS ARGV:  hue.py,n,t,h,i,o
OPTS:
ARGS:  n,t,h,i,o

And:
C:\temp>python hue.py  -i image.py n  t  h  o
SYS ARGV:  hue.py,-i,image.py,n,t,h,o
OPTS:  ('-i', 'image.py')
ARGS:  n,t,h,o

Hope that hepls.
Tom



From dan at dontspammecauseidontlikit.com  Wed Apr 13 20:59:54 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Thu, 14 Apr 2005 08:59:54 +0800
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
	<425d3b01$1@nntp0.pdx.net> <d3jg22$hvn$1@panix2.panix.com>
Message-ID: <r3gr51di7jad7f129jcdgori0cc8nc03do@4ax.com>

On 13 Apr 2005 12:06:26 -0400, roy at panix.com (Roy Smith) wrote:

>Scott David Daniels  <Scott.Daniels at Acm.Org> wrote:
>>If you think those are fun, try base (1j - 1)
>
>Get real.  I can't imagine using anything so complex.

Well said.  :-)

Dan


From notsew-reversePreceedingAndRemoveThis at canncentral.org  Mon Apr 18 21:29:22 2005
From: notsew-reversePreceedingAndRemoveThis at canncentral.org (weston)
Date: 18 Apr 2005 18:29:22 -0700
Subject: Trouble Installing TTX/FontTools (asks for .NET Framework Packages)
Message-ID: <1113874162.678930.249700@g14g2000cwa.googlegroups.com>

I'm trying to install FontTools ("a library for manipulating fonts,
written in Python") on a Win XP box, and I'm given a bit of pause that
this process seems to require downloading some MS .NET framework
packages -- at least, this is what the "setup.py" script has told when
I've tried to run it:

"error: The .NET Framework SDK needs to be installed before building
extensions
for Python."

Hmmm. It gets a bit worse, too. If one searches for the .NET Framework
SDK, one arrives at a page on the Microsoft site which states: "You
must install the .NET Framework Redistributable Package version 1.1
prior to installing the Microsoft .NET Framework SDK version 1.1."

Is this really the case? It seems odd that a python library would
require anything related to .NET. Could I have messed up somewhere in
the installation process?



From sabbey at u.washington.edu  Sat Apr 16 20:25:00 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 17:25:00 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
Message-ID: <Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>

On Sat, 16 Apr 2005, Ron_Adam wrote:
>> Thunks are, as far as this PEP is concerned, anonymous functions that
>> blend into their environment. They can be used in ways similar to code
>> blocks in Ruby or Smalltalk. One specific use of thunks is as a way to
>> abstract acquire/release code. Another use is as a complement to
>> generators.
>
> I'm not familiar with Ruby or Smalltalk.  Could you explain this
> without referring to them?

Hopefully my example below is more understandable.  I realize now that I 
should have provided more motivational examples.

>> def f(thunk):
>>    before()
>>    thunk()
>>    after()
>>
>> do f():
>>    stuff()
>>
>> The above code has the same effect as:
>>
>> before()
>> stuff()
>> after()
>
> You can already do this, this way.
>
>>>> def f(thunk):
> ...     before()
> ...     thunk()
> ...     after()
> ...
>>>> def before():
> ...     print 'before'
> ...
>>>> def after():
> ...     print 'after'
> ...
>>>> def stuff():
> ...     print 'stuff'
> ...
>>>> def morestuff():
> ...     print 'morestuff'
> ...
>>>> f(stuff)
> before
> stuff
> after
>>>> f(morestuff)
> before
> morestuff
> after
>>>>
>
> This works with arguments also.

Yes, much of what thunks do can also be done by passing a function 
argument.  But thunks are different because they share the surrounding 
function's namespace (which inner functions do not), and because they can 
be defined in a more readable way.

>> Other arguments to 'f' get placed after the thunk:
>>
>> def f(thunk, a, b):
>>     # a == 27, b == 28
>>     before()
>>     thunk()
>>     after()
>>
>> do f(27, 28):
>>     stuff()
>
> Can you explain what 'do' does better?
>
> Why is the 'do' form better than just the straight function call?
>
> 	f(stuff, 27, 28)
>
> The main difference I see is the call to stuff is implied in the
> thunk, something I dislike in decorators.  In decorators, it works
> that way do to the way the functions get evaluated.  Why is it needed
> here?

You're right that, in this case, it would be better to just write 
"f(stuff, 27, 28)".  That example was just an attempt at describing the 
syntax and semantics rather than to provide any sort of motivation.  If 
the thunk contained anything more than a call to 'stuff', though, it would 
not be as easy as passing 'stuff' to 'f'.  For example,

do f(27, 28):
 	print stuff()

would require one to define and pass a callback function to 'f'.  To me, 
'do' should be used in any situation in which a callback *could* be used, 
but rarely is because doing so would be awkward.  Probably the simplest 
real-world example is opening and closing a file.  Rarely will you see 
code like this:

def with_file(callback, filename):
 	f = open(filename)
 	callback(f)
 	f.close()

def print_file(file):
 	print file.read()

with_file(print_file, 'file.txt')

For obvious reasons, it usually appears like this:

f = open('file.txt')
print f.read()
f.close()

Normally, though, one wants to do a lot more than just print the file. 
There may be many lines between 'open' and 'close'.  In this case, it is 
easy to introduce a bug, such as returning before calling 'close', or 
re-binding 'f' to a different file (the former bug is avoidable by using 
'try'/'finally', but the latter is not).  It would be nice to be able to 
avoid these types of bugs by abstracting open/close.  Thunks allow you to 
make this abstraction in a way that is more concise and more readable than 
the callback example given above:

do f in with_file('file.txt'):
 	print f.read()

Thunks are also more useful than callbacks in many cases since they allow 
variables to be rebound:

t = "no file read yet"
do f in with_file('file.txt'):
 	t = f.read()

Using a callback to do the above example is, in my opinion, more 
difficult:

def with_file(callback, filename):
 	f = open(filename)
 	t = callback(f)
 	f.close()
 	return t

def my_read(f):
 	return f.read()

t = with_file(my_read, 'file.txt')

>
> When I see 'do', it reminds me of 'do loops'. That is 'Do' involves
> some sort of flow control.  I gather you mean it as do items in a
> list, but with the capability to substitute the named function.  Is
> this correct?

I used 'do' because that's what ruby uses for something similar.  It can 
be used in a flow control-like way, or as an item-in-a-list way.  For 
example, you could replace 'if' with your own version (not that you would 
want to):

def my_if(thunk, val):
 	if val:
 		thunk()

do my_if(a):     # same as "if a:"
 	assert a

(replacing "else" wouldn't be possible without allowing multiple thunks.)

Or you could create your own 'for' (again, NTYWWT):

def my_for(thunk, vals):
 	for i in vals:
 		thunk(i)

do i in my_for(range(10)):
 	print i


-Brian


From paul at prescod.net  Tue Apr  5 13:13:07 2005
From: paul at prescod.net (Paul Prescod)
Date: Tue, 05 Apr 2005 10:13:07 -0700
Subject: Reminder: Vanouver Python Meeting Tonight
Message-ID: <4252C723.100@prescod.net>

DateTime: April 5, 2005, 7:00 PM
Place: http://www.vanpyz.org/ActiveState
Topic: Python Quirks, Warts and Complaints

Nothing is perfect: even Python. This meeting will be an opportunity for 
Python programmers to get together and learn from each other. We'll go 
through issues we've run into and things we would like changed in future 
versions of Python. The discussion will start with a presentation based 
on a talk from last year's conference. From there we'll open the floor 
to everyone.

More information: http://www.vanpyz.org/

(or reply to me)

  Paul Prescod



From Mailer_Daemon at physoc.org  Mon Apr 11 02:45:11 2005
From: Mailer_Daemon at physoc.org (Mailer_Daemon at physoc.org)
Date: Mon, 11 Apr 2005 07:45:11 +0100
Subject: Message Delivery Failure - due to attachments
Message-ID: <20050411064603.E22262524AC@smtp.nildram.co.uk>

The message below (subject: "Server Report")  that you sent was not delivered because it contained one or more prohibited attachments. The prohibited attachment filenames are below:

 - "epclrti.zip" was prohibited


---------------------------------------
-------------- next part --------------
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From Pokerface.1nhocp at no-mx.tacticalgamer.com  Thu Apr 14 13:06:41 2005
From: Pokerface.1nhocp at no-mx.tacticalgamer.com (Pokerface)
Date: Thu, 14 Apr 2005 13:06:41 -0400
Subject: Get the entire file in a variable - error
References: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
Message-ID: <Pokerface.1nhocp@no-mx.tacticalgamer.com>


What kind of DB?  Maybe the field type you're hunting for is a BLOB?  Or
perhaps you need to be formatting the string differently than it's
entered (like php's addslashes() or something)?


-- 
Pokerface:: Posted from Tactical Gamer - http://www.TacticalGamer.com ::



From bokr at oz.net  Sat Apr  2 22:20:51 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 03 Apr 2005 03:20:51 GMT
Subject: instance name
References: <99z3e.1157607$35.42889387@news4.tin.it>
Message-ID: <424f5ca8.160435864@news.oz.net>

On Sat, 02 Apr 2005 15:48:21 GMT, "max(01)*" <max2 at fisso.casa> wrote:

>hi.
>
>is there a way to define a class method which prints the instance name?
>
>e.g.:
>
> >>> class class_1:
>...   def myName(self):
>...     ????what should i do here????
>...
> >>> instance_1 = class_1()
> >>> instance_1.myName()
>'instance_1'
> >>>
>
Names in any given name space do not have a 1:1 relationship with class instances.
If you want to give an instance its own name, give it a name when you create it,
or attach a name to the instance. E.g, maybe this will give you an idea:

 >>> class Ego(object):
 ...     def __init__(self, name='(anonymous)'): self.name = name
 ...     def myName(self): return self.name
 ...
 >>> instance_1 = Ego('one')
 >>> instance_2 = Ego('two')
 >>> instance_1.myName()
 'one'
 >>> instance_2.myName()
 'two'
 >>> instance_2 = instance_1
 >>> instance_2.myName()
 'one'
Did you catch that ;-)

Ok, now without instance name bindings at all, just references from a list:
 >>> egoes = [Ego(name) for name in 'one two three'.split()]
 >>> egoes
 [<__main__.Ego object at 0x02EF1A4C>, <__main__.Ego object at 0x02EF1A6C>, <__main__.Ego object
 at 0x02EF1A8C>]
 >>> for ego in egoes: print ego.myName()
 ...
 one
 two
 three

We don't have to access instance by names like instance_1, if we didn't make
them with bindings like that. E.g., egoes is a name bound to a list of Ego instances,
so we can get at the second (counting from index 0) instance thus, and change it's
name from the outside, since we know it's stored as an attribute called 'name':

 >>> egoes[1].name = 'Zeppo'
 >>> for ego in egoes: print ego.myName()
 ...
 one
 Zeppo
 three 

HTH

Regards,
Bengt Richter


From theller at python.net  Tue Apr 12 12:05:13 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 12 Apr 2005 18:05:13 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
	<425AF2AB.1030401@v.loewis.de>
	<425b8948$0$38045$bed64819@news.gradwell.net>
	<mailman.1769.1113320562.1799.python-list@python.org>
Message-ID: <aco47zgm.fsf@python.net>

"Terry Reedy" <tjreedy at udel.edu> writes:

[...]
> Also, I think it a bit 'anti-social' to hide usage of Python.  If all 
> Python Windows programs ran with a normal, communally installed Python, 
> then users would gradually get the idea that having Python installed is 
> much like having Shockwave and other utility platforms installed, and that 
> is is part of a 'fully loaded' Windows system to have a .py player 
> installed.

Isn't it a bit harsh to call this 'anti-social'?

>
> If there is something about the default install of Python on Windows that 
> makes it less desireable or less easy than other platforms, then maybe that 
> can be fixed.  To make installation easier, maybe someone could write a 
> small .exe that could be frozen with scripts or run with installers and 
> that would detect the presence/absence of the needed Python version and 
> offer an auto download and install if needed.

Sure.  Someone.

>
> At least one thing in Python's favor is the lack of having to 'register' 
> before downloading (or after installation) and the ability to redistribute 
> the installer free and without special license.

Thomas


From fred at adventistcare.org  Sat Apr  9 08:38:25 2005
From: fred at adventistcare.org (Sells, Fred)
Date: Sat, 9 Apr 2005 08:38:25 -0400 
Subject: PPC OSX vs. x86 Linux
Message-ID: <777056A4A8F1D21180EF0008C7DF75EE0331743B@sunbelt.org>

I'm no expert on internals, but I seem to recall that in the past, the
string module could be implemented in either C or Python and I think there
is a strop module that is related to all this.  Could it be that on the Mac,
your string processing is using interpreted Python byte code while linux
uses c?

-----Original Message-----
From: Joshua Ginsberg [mailto:listspam at flowtheory.net]
Sent: Friday, April 08, 2005 1:03 PM
To: python-list at mail.python.org
Subject: PPC OSX vs. x86 Linux


Hello --

I writing some python code to do some analysis of my mail logs. I took 
a 10,000 line snippet from them (the files are about 5-6 million 
usually) to test my code with. I'm developing it on a Powerbook G4 
1.2GHz with 1.25GB of RAM and the Apple distributed Python* and I 
tested my code on the 10,000 line snippet. It took 2 minutes and 10 
seconds to process that snippet. Way too slow -- I'd be looking at 
about 20 hours to process a single daily log file.

Just for fun, I copied the same code and the same log snippet to a 
dual-proc P3 500MHz machine running Fedora Core 2* with 1GB of RAM and 
tested it there. This machine provides web services and domain control 
for my network, so it's moderately utilized. The same code took six 
seconds to execute.

Granted I've got the GUI and all of that bogging down my Mac. However, 
I had nothing else fighting for CPU cycles and 700MB of RAM free when 
my testing was done. Even still, what would account for such a wide, 
wide, wide variation in the time required to process the data file? The 
code is 90% regular expressions and string finds.

Theories? Thanks!

-jag


* versions are:
Python 2.3 (#1, Sep 13 2003, 00:49:11)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
and
Python 2.3.3 (#1, May  7 2004, 10:31:40)
[GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2


Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
-- 
http://mail.python.org/mailman/listinfo/python-list


From bvande at po-box.mcgill.ca  Tue Apr 12 18:28:24 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Tue, 12 Apr 2005 18:28:24 -0400
Subject: nested tuple slice
In-Reply-To: <e75321bd0504121449454c7581@mail.gmail.com>
References: <e75321bd0504121449454c7581@mail.gmail.com>
Message-ID: <425C4B88.6030706@po-box.mcgill.ca>

dimitri pater said unto the world upon 2005-04-12 17:49:
> hello!
> 
> I want to change a nested tuple like:
> tuple = (('goat', 90, 100), ('cat', 80, 80), ('platypus', 60, 800))
> into:
> tuple = (('goat', 90), ('cat', 80), ('platypus', 60))
> 
> in other words, slice the first elements of every index
> 
> Any ideas on how to do this in an elegant, pythonic way?
> 
> Best regards,
> Dimitri
> 
> 

Hi Dimitri,

here's one way:

 >>> my_tuple = (('goat', 90, 100), ('cat', 80, 80), ('platypus', 60, 
800))
 >>> my_sliced_tuple = tuple([x[0:2] for x in my_tuple])
 >>> my_sliced_tuple
(('goat', 90), ('cat', 80), ('platypus', 60))
 >>>

BTW, don't use `tuple' as a name. You can, but then you hide the 
built-in tuple function. And, you need that :-)

Best,

Brian vdB



From rkern at ucsd.edu  Mon Apr  4 11:35:02 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 04 Apr 2005 08:35:02 -0700
Subject: Question about Enthought python distribution
In-Reply-To: <d2qubl$77j$1@news.Stanford.EDU>
References: <d2qubl$77j$1@news.Stanford.EDU>
Message-ID: <42515eaf$1_5@alt.athenanews.com>

Oh Kyu Yoon wrote:
> Hi!
> I have been using the python 2.3.3 distribution from Enthought Inc because 
> it has most of the libraries I use included.
> Does anyone know when Enthought will release the python 2.4 distribution?

The next release will be based on Python 2.3.5. They probably won't 
release a 2.4-based version for some time. They use this distribution as 
the base for the software they write for their clients, and they don't 
have current intentions to develop against 2.4 quite yet.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From facundobatista at gmail.com  Tue Apr 19 16:54:04 2005
From: facundobatista at gmail.com (Facundo Batista)
Date: Tue, 19 Apr 2005 17:54:04 -0300
Subject: Array of Chars to String
In-Reply-To: <200504191333.17374.jstroud@mbi.ucla.edu>
References: <200504191333.17374.jstroud@mbi.ucla.edu>
Message-ID: <e04bdf310504191354357d63b0@mail.gmail.com>

On 4/19/05, James Stroud <jstroud at mbi.ucla.edu> wrote:

> astr = "Bob Carol Ted Alice"
> letters = "adB"
> 
> import sets
> alist = [lttr for lttr in astr if lttr in Set(letters)]
> newstr = ""
> for lttr in alist:
>   newstr += lttr

>>> astr = "Bob Carol Ted Alice"
>>> letters = "adB"
>>> s1 = set(astr)   # set is a core data type in Py2.4
>>> s2 = set(letters)
>>> ''.join(s1 & s2)
'aBd'

>>> .    Facundo

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


From mauriceling at acm.org  Wed Apr 27 18:39:06 2005
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 28 Apr 2005 08:39:06 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org><mailman.2524.1114533204.1799.python-list@python.org><d4mc39$dl9$1@domitilla.aioe.org>	<426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
	<mailman.2589.1114619222.1799.python-list@python.org>
Message-ID: <d4p4af$qn4$1@domitilla.aioe.org>

Terry Reedy wrote:

> I doubt anyone disputes that upgrades are more hassle than we would like. 
> My main point was that freezing CPython's technology is not the solution. 
> Any other upgrade helper that you can contribute will be welcome.
> 
> Terry J. Reedy
> 
> 
> 

So there is no way of releasing a close-source application written in 
Python?

Forget about reverse engineering or decompiling, things like EU Council 
Directive, Berne Convention , and legislation of individual countries 
are to be used and argued for handling what decompilation is allowed or 
not allowed. It does make a difference between  looking at the codes 
when it is given and performing an act of decompilation to look at the 
codes. As mentioned in one of my postings, it may be analogous to the 
difference between you dropping some cash on the ground and I take it, 
and I performing the act of pickpocketing and take your money.

I am not advocating close source in any sense and I believe the choice 
of open or close source distribution is individual's and corporate's rights.

Cheers
Maurice


From steven.bethard at gmail.com  Mon Apr 25 02:04:12 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 25 Apr 2005 00:04:12 -0600
Subject: What's do list comprehensions do that generator expressions
	don't?
In-Reply-To: <mailman.2430.1114408769.1799.python-list@python.org>
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
Message-ID: <4u2dnTeE0-PBFfHfRVn-vQ@comcast.com>

Robert Kern wrote:
> Mike Meyer wrote:
> 
>> Ok, we've added list comprehensions to the language, and seen that
>> they were good. We've added generator expressions to the language, and
>> seen that they were good as well.
>>
>> I'm left a bit confused, though - when would I use a list comp instead
>> of a generator expression if I'm going to require 2.4 anyway?
> 
> Never. If you really need a list
> 
> list(x*x for x in xrange(10))

Not quite true.  If you discovered the unlikely scenario that the 
construction of a list from the generator expression was an efficiency 
bottleneck, you might choose a list comprehension -- they're slightly 
faster when you really do want a list:

$ python -m timeit "list(x*x for x in xrange(10))"
100000 loops, best of 3: 6.54 usec per loop

$ python -m timeit "[x*x for x in xrange(10)]"
100000 loops, best of 3: 5.08 usec per loop

STeVe


From RonGrossi382905 at yahoo.com  Wed Apr 27 19:52:35 2005
From: RonGrossi382905 at yahoo.com (RonGrossi382905 at yahoo.com)
Date: 27 Apr 2005 16:52:35 -0700
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_your_?=
	=?iso-8859-1?q?location=2E_I_want_to_ask_you_the_most_important_qu?=
	=?iso-8859-1?q?estion_of_your_life=2E_Your_joy_or_sorrow_for_all_e?=
	=?iso-8859-1?q?ternity_depends_upon_your_answer=2E_The_question_is?=
	=?iso-8859-1?q?=3A_Are_you_saved=3F_It_is_not_a_question_of_how_go?=
	=?iso-8859-1?q?od_you_are=2C_nor_if_you_are_a_church_member=2C_but?=
	=?iso-8859-1?q?_are_you_saved=3F_Are_you_sure_you_will_go_to_Heave?=
	=?iso-8859-1?q?n_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST=B7151?=
Message-ID: <1114640803.968454.307070@o13g2000cwo.googlegroups.com>


This is the most important question of your life.

The question is: Are you saved?

It is not a question of how good you are,
nor if you are a church member, but are you saved?

Are you sure you will go to Heaven when you die?

The reason some people don't know for sure if they
are going to Heaven when they die is because they
just don't know.

The good news is that you can know for sure that
you are going to Heaven.

The Holy Bible describes Heaven as a beautiful
place with no death, sorrow, sickness or pain.

God tells us in the Holy Bible how simple it is
to be saved so that we can live forever with Him
in Heaven.

"For if you confess with your mouth Jesus is Lord
and believe in your heart that God raised Him from
the dead, you WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven to earth
in the person of Jesus Christ to shed His blood
and die on a cross to pay our sin debt in full.

Jesus Christ was born in Israel supernaturally to
a virgin Jewish woman named Mary and lived a sinless
life for thirty-three years.

At the age of thirty-three Jesus was scourged and
had a crown of thorns pressed onto His head then
Jesus was crucified.

Three days after Jesus died on a cross and was
placed in a grave Jesus rose from the dead as Jesus
said would happen before Jesus died.

If someone tells you that they are going to die and
then three days later come back to life and it
actually happens then this person must be the
real deal.

Jesus Christ is the only person that ever lived a
perfect sinless life.

This is why Jesus is able to cover our sins(misdeeds)
with His own blood because Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we have
redemption through His blood, the forgiveness of
sins..." (Ephesians 1:7)

If you would like God to forgive you of your past,
present and future sins just ask Jesus Christ to be
your Lord and Saviour.

It doesn't matter how old you are or how many bad
things that you have done in your life including
lying and stealing all the way up to murder.

Just pray the prayer below with your mouth and mean
it from your heart and God will hear you and save you.

Dear Jesus Christ, I want to be saved so that I can
have a home in Heaven with You when I die. I agree
with You that I am a sinner. I believe that You love
me and want to save me. I believe that You bled and
died on the cross to pay the penalty for my sins and
that You rose from the dead. Please forgive my sins
and come into my heart and be my Lord and Saviour.
Thanks Lord Jesus Christ for forgiving me and saving
me through Your merciful grace. Amen.

Welcome to the family of God if you just allowed God
to save you.

Now you are a real Christian and you can know for
sure that you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid sin(wrongdoing),
but if you do sin the Holy Bible says, "My dear
children, I write this to you so that you will not
sin. But if anybody does sin, we have one who speaks
to the Father in our defense Jesus Christ,
the Righteous One."

Those of you that have not yet decided to place your
trust in the Lord Jesus Christ may never get another
chance to do so because you do not know when you
will die.

Jesus said, "I am the way, the truth and the life:
no one can come to the Father(God)(in Heaven), but
by me." (John 14:6)

This means that if you die without trusting in Jesus
Christ as your Lord and Saviour you will die in your
sins and be forever separated from the love of God in
a place called Hell.

The Holy Bible descibes Hell as a place of eternal
torment, suffering, pain and agony for all those who
have rejected Jesus Christ.

The good news is that you can avoid Hell by allowing
Jesus Christ to save you today. Only then will you
have true peace in your life knowing that no matter
what happens you are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi


*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!






..???`???...???`???.?..???`???...???`???.


Got Questions?
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Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.biblegateway.com


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*This message may get deleted so you may want to print a copy.
*Just press the [Ctrl][P] keys on your keyboard to print this page.



From WLigtenberg at gmail.com  Thu Apr 21 08:55:31 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Thu, 21 Apr 2005 14:55:31 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<426640b6$1_1@newspeer2.tds.net>
Message-ID: <pan.2005.04.21.12.55.28.485326@gmail.com>

I'll first try it using SAX, because I want to have as little dependancies
as possible. I already have BioPython as a dependancy. And I personally
don't like to install lot's of packages for a program to work. So I don't
want to impose that on other people.
But thanks anyway and I might go for the cElementTree later on, if the
ordinary SAX proves to slow...

On Wed, 20 Apr 2005 08:03:00 -0400,
Kent Johnson wrote:

> Willem Ligtenberg wrote:
>>>Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
>>>
>>>>I want to parse a very large (2.4 gig) XML file (bioinformatics
>>>>ofcourse :)) But I have no clue how to do that. Most things I see read
>>>>the entire xml file at once. That isn't going to work here ofcourse.
>>>>
>>>>So I would like to parse a XML file one record at a time and then be
>>>>able to store the information in another object.  How should I do
>>>>that?
>> 
>> The XML file I need to parse contains information about genes.
>> So the first element is a gene and then there are a lot sub-elements with
>> sub-elements. I only need some of the informtion and want to store it in
>> my an object called gene. Lateron this information will be printed into a
>> file, which in it's turn will be fed into some other program.
>> This is an example of the XML
>> <?xml version="1.0"?>
>> <!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN" "NCBI_Entrezgene.dtd">
>> <Entrezgene-Set>
>>   <Entrezgene>
>>     <snip>
>>   </Entrezgene>
>> </Entrezgene-Set>
> 
> This should get you started with cElementTree:
> 
> import cElementTree as ElementTree
> 
> source = 'Entrezgene.xml'
> 
> for event, elem in ElementTree.iterparse(source):
>      if elem.tag == 'Entrezgene':
>          # Process the Entrezgene element
>          geneid = elem.findtext('Entrezgene_track-info/Gene-track/Gene-track_geneid')
>          print 'Gene id', geneid
> 
>          # Throw away the element, we're done with it
>          elem.clear()
> 
> Kent



From dimitri.pater at gmail.com  Fri Apr 15 18:51:17 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Sat, 16 Apr 2005 00:51:17 +0200
Subject: Glade for Windows and Python
In-Reply-To: <Pr2dnYstzcxopv3fRVn-oQ@bright.net>
References: <Pr2dnYstzcxopv3fRVn-oQ@bright.net>
Message-ID: <e75321bd05041515515f8cf4c1@mail.gmail.com>

It's not exactly Glade, but did you try wxGlade?

dimitri

On 4/16/05, Richard Lyons <snoylr at cheqnet.net> wrote:
> 
> Has anyone been successful in using Glade for Windows with Python?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



-- 
Please visit dimitri's website: www.serpia.com <http://www.serpia.com>
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From WLigtenberg at gmail.com  Fri Apr 22 09:22:17 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Fri, 22 Apr 2005 15:22:17 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
Message-ID: <pan.2005.04.22.13.22.14.591804@gmail.com>

As I'm trying to write the code using cElementTree.
I stumble across one problem. Sometimes there are multiple values to
retrieve from one record for the same element. Like this:
<Prot-ref_name_E>ATP-binding cassette, subfamily G, member 1</Prot-ref_name_E>
<Prot-ref_name_E>ATP-binding cassette 8</Prot-ref_name_E>

How do you get not only the first, but the rest as well, so that I can
store it in a list.

Thanks in advance,

Willem Ligtenberg

On Fri, 22 Apr 2005 13:48:15 +0200, Willem Ligtenberg wrote:

> This is all the info I need from the xml file:
> ID --> 	<Gene-track_geneid>320632</Gene-track_geneid>
> 
> Name --> 	<Gene-ref>
>         <Gene-ref_locus>Pzp</Gene-ref_locus>
>         
> Startbase --> <Gene-commentary_seqs>
>         <Seq-loc>
>           <Seq-loc_int>
>             <Seq-interval>
>               <Seq-interval_from>126957426</Seq-interval_from>
>               <Seq-interval_to>126989473</Seq-interval_to>
>               <Seq-interval_strand>
>                 <Na-strand value="plus"/>
>               </Seq-interval_strand>
>               <Seq-interval_id>
>                 <Seq-id>
>                   <Seq-id_gi>51860766</Seq-id_gi>
>                 </Seq-id>
>               </Seq-interval_id>
>             </Seq-interval>
>           </Seq-loc_int>
>         </Seq-loc>
>       </Gene-commentary_seqs>
> Endbase
> 
> Function --> <Prot-ref_name>
>         <Prot-ref_name_E>U5 snRNP-specific protein, 200 kDa</Prot-ref_name_E>
>         <Prot-ref_name_E>U5 snRNP-specific protein, 200 kDa (DEXH RNA helicase
> family)</Prot-ref_name_E>
>       </Prot-ref_name>
> 
> DBLink --> <Gene-ref_locus-tag>MGI:2444401</Gene-ref_locus-tag>
> <Gene-commentary_source>
>                 <Other-source>
>                   <Other-source_src>
>                     <Dbtag>
>                       <Dbtag_db>GO</Dbtag_db>
>                       <Dbtag_tag>
>                         <Object-id>
>                           <Object-id_id>5524</Object-id_id>
>                         </Object-id>
>                       </Dbtag_tag>
>                     </Dbtag>
>                   </Other-source_src>
>                   <Other-source_anchor>ATP binding</Other-source_anchor>
>                   <Other-source_post-text>evidence: ISS</Other-source_post-text>
>                 </Other-source>
>               </Gene-commentary_source>
> 
> Product-type --> <Entrezgene_type value="protein-coding">6</Entrezgene_type>
> 
> gene-comment --> <Gene-ref_desc>activating signal cointegrator 1 complex subunit 3-like
> 1</Gene-ref_desc>
> 
> synonym --> <Gene-ref_syn>
>         <Gene-ref_syn_E>HELIC2</Gene-ref_syn_E>
>         <Gene-ref_syn_E>KIAA0788</Gene-ref_syn_E>
>         <Gene-ref_syn_E>U5-200KD</Gene-ref_syn_E>
>         <Gene-ref_syn_E>U5-200-KD</Gene-ref_syn_E>
>         <Gene-ref_syn_E>A330064G03Rik</Gene-ref_syn_E>
>       </Gene-ref_syn>
>       
> EC --> <Prot-ref_ec>
>         <Prot-ref_ec_E>1.5.1.5</Prot-ref_ec_E>
>         <Prot-ref_ec_E>3.5.4.9</Prot-ref_ec_E>
>       </Prot-ref_ec>
> 
> Chromosome: <SubSource>
>             <SubSource_subtype value="chromosome">1</SubSource_subtype>
>             <SubSource_name>6</SubSource_name>
>           </SubSource>
> 
> Some can happen more than once in a record.
> 
> 
> On Fri, 22 Apr 2005 02:41:46 -0400, William Park wrote:
> 
>> Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
>>> On Sun, 17 Apr 2005 02:16:04 +0000, William Park wrote:
>>> > Care to post more details?
>>> 
>>> The XML file I need to parse contains information about genes.
>>> So the first element is a gene and then there are a lot sub-elements with
>>> sub-elements. I only need some of the informtion and want to store it in
>>> my an object called gene. Lateron this information will be printed into a
>>> file, which in it's turn will be fed into some other program.
>> 
>> You have to help us a little more here.  Which info do you want to
>> extract from below example?
>> 
>>> <Entrezgene-Set>
>>> ...
>>> </Entrezgene-Set>



From ahmedt at gmail.com  Wed Apr 20 15:32:45 2005
From: ahmedt at gmail.com (ahmedt at gmail.com)
Date: 20 Apr 2005 12:32:45 -0700
Subject: What's the difference between these 2 statements?
In-Reply-To: <3cnmpbF6gnlkhU1@individual.net>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
Message-ID: <1114025565.402098.276640@l41g2000cwc.googlegroups.com>

s[len(s):-1:-1] yields an empty list !

Test code :

	s = "12345"
	print s[len(s)::-1]             -> prints "54321"
	print s[len(s):-1:-1]          -> prints "" (nothing)



From WLigtenberg at gmail.com  Fri Apr 22 09:41:46 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Fri, 22 Apr 2005 15:41:46 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
	<pan.2005.04.22.13.22.14.591804@gmail.com>
Message-ID: <pan.2005.04.22.13.41.45.76963@gmail.com>

By the way, I know about findall, but when I iterate thruogh it like:
for x in function:
	print 'function', x

I get:
function <Element 'Prot-ref_name_E' at 0xb7d10cf8>
function <Element 'Prot-ref_name_E' at 0xb7d10d10>

But ofcourse I want the information in there...

On Fri, 22 Apr 2005 15:22:17 +0200, Willem Ligtenberg wrote:

> As I'm trying to write the code using cElementTree.
> I stumble across one problem. Sometimes there are multiple values to
> retrieve from one record for the same element. Like this:
> <Prot-ref_name_E>ATP-binding cassette, subfamily G, member 1</Prot-ref_name_E>
> <Prot-ref_name_E>ATP-binding cassette 8</Prot-ref_name_E>
> 
> How do you get not only the first, but the rest as well, so that I can
> store it in a list.
> 
> Thanks in advance,
> 
> Willem Ligtenberg
> 


From aldric.lhernault at free.fr.net^W  Sun Apr 10 06:43:16 2005
From: aldric.lhernault at free.fr.net^W (Aldric L'Hernault)
Date: Sun, 10 Apr 2005 12:43:16 +0200
Subject: check instace already running...
In-Reply-To: <mailman.1606.1113038508.1799.python-list@python.org>
References: <hpM5e.36121$IN.685498@twister2.libero.it>	<2ab2ed5505040902024cc47944@mail.gmail.com>
	<mailman.1606.1113038508.1799.python-list@python.org>
Message-ID: <42590357$0$28646$636a15ce@news.free.fr>

Sidharth Kuruvila a ?crit :
> I haven't tested this. There is probably a better way of doing this
> looking at process information. I use a lock file to mark that the
> program is already running. The problem is that for an abrupt shutdown
> the file might not be removed.

To enhance your check, just write the PID into the file.
On startup, if file exists, you may check that the process
who has written it is still alive.

Aldric L.


From anthra.norell at tiscalinet.ch  Tue Apr 19 10:25:49 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Tue, 19 Apr 2005 16:25:49 +0200
Subject: Problem with colors writing ImageFonts into a 'P'-mode Image
Message-ID: <01f301c544eb$af68a000$0201a8c0@mcuf7>

Hi all,

   I have a problem with writing an ImageFont into a 'P' mode Image.
The letters pick up what look like randomly colored pixels along their edges.

Thanks for any suggestions

Frederic


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


The attached picture is one of those that tell more than a thousand words.


The code that made its two components

   ...
   I = Image.new ('P', (10, 10), color = I_EVEN_REDDISH)  # okay. 
   I.putpalette (p)  # p: 3 * 256 integers                # okay
   D = ImageDraw.Draw (I)                                 # okay
   D.line ((0,0,50,50), fill = I_ODD_BLUISH)              # okay. index
   F = ImageFont.truetype (FONT_FILE, font_size)          # okay
>>>D.text (F, 'Abc', (0,0), fill = BLACK_I_256)           # Not okay? <<<

The second run was a fill color closer to the background color:

>>>D.text (F, 'Abc', (0,0), fill = I_ODD_BLUISH)          # Not okay but different! <<<

I_EVEN_REDDISH, I_ODD_BLUISH, BLACK_I_256 are palette indexes somewhere in the range 0 to 255 

The attached composite is a manual edit.


The (obvious) problem

The D.text method seems to scatter strangely colored pixels along 
the outlines or the letters. These false colors somehow depend on 
the fill color (color of the text). Namely, if the fill color approaches 
the background color, the confetti get tamer too. 


A hunch

Could it be that some aliasing mechanism interpolates palette 
indexes instead of color triplets? If I don't load my palette, the 
default palette is a linear gray scale and the letters indeed have 
aliased outlines. With a linear gray scale, of course, the indexes 
are identical with the data they index and so a wrong algorithm 
would produce a correct result.


The Configuration

Dell Insprion 8000
Windows ME
Python 2.2.2. 
Python Imaging Library 1.1.2
No evidence ever of an improper configuration.

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


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From kay.schluehr at gmx.net  Sun Apr 17 01:46:17 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Apr 2005 22:46:17 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<1113667629.375491.44380@l41g2000cwc.googlegroups.com>
	<42618007.117284766@news.oz.net> <4261d351.138606786@news.oz.net>
Message-ID: <1113716777.825250.15660@l41g2000cwc.googlegroups.com>

Bengt Richter wrote:
> On Sun, 17 Apr 2005 01:10:47 GMT, bokr at oz.net (Bengt Richter) wrote:
> [...]
> >
> >The "::" expression I'm proposing generalizes capturing suite
bindings into an ordered sequence of (key,value)
> >tuples, like an ordered vars().items() limited to the bindings
produced in the suite following "::"
> >Thus
> >    items = ::
> >        x = 1
> >        y = [1,2]
> >        def foo():pass

I like this idea of "folding definitions into dicts" very much and
think that it is on the ground of suite-basing. It breaks down the
barrier between expressions and statements in Python without
annihilating it. I think it is also wise to restrict '::' to certain
accumulations. I don't like the idea of storing and dropping whole code
fragments in an irresponsible manner as Brian did for trapping the
compiler in his generator-to-function example of the thunks pre-PEP.

I think that '::' and 'where' are true and explicit representations of
the content of this proposal and be less redundant than the "as
<specifier>" syntax with it's various specifiers. Introducing '::'
would make the "folding definitions into dict" operation visible that
takes place in the machinery of the VM. Very Pythonic IMHO :-)

+1 from me for '::' and 'where'.

Regards,
Kay



From rogerb at rogerbinns.com  Wed Apr 13 23:11:33 2005
From: rogerb at rogerbinns.com (Roger Binns)
Date: Wed, 13 Apr 2005 20:11:33 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net><is2tmhzk.fsf@python.net><425aa0fb$0$38041$bed64819@news.gradwell.net><425AF2AB.1030401@v.loewis.de><425b8948$0$38045$bed64819@news.gradwell.net>
	<mailman.1769.1113320562.1799.python-list@python.org>
Message-ID: <1o31j2-7l6.ln1@home.rogerbinns.com>


"Terry Reedy" <tjreedy at udel.edu> wrote in message news:mailman.1769.1113320562.1799.python-list at python.org...
> I guess I don't understand some people's determination to not have users install fully useable Python on their Windows machines.

Ok, here is how you install BitPim which contains a frozen Python:

  - Download and run the setup.exe from www.bitpim.org  (The
    instructions are the equivalent on Linux and Mac)

This is how you would do it if a "fully usable" Python had to be put on a
machine.

  - Download and install Python from www.python.org
  - Download and install wxPython from www.wxpython.org making sure to
    get the correct platform, Python version, wxPython version and Unicode
    setting
  - Download and install pyserial from pyserial.sf.net for your platform
  - Download and install win32all making sure you get the right Python
    version (Windows only)
  - Download and install DSV from sf.net/projects/python-dsv
  - Download and install APSW from www.rogerbinns.com/apsw.html
    (Non-Windows users will also have to compile SQLite 3)
  - Download and install the BitPim code
  - There are a few other components which non-Windows users typically need
    and Windows users don't (eg USB library)
  - Now launch the main Python script to start BitPim

The uninstall instructions have the same corresponding lengths.  Now for the
second part, you could make some arguments:

   - I shouldn't be using other components in order to reduce dependencies
     and should instead re-invent the wheel myself.
   - I could make some sort of installer that did all the non-Python interpretter
     pieces and it would have to be compatible with anyone else doing the same
     thing.

The first is a waste of my time and effort, and I do the second except I also
include the Python interpretter meaning there are no dependencies.

> Also, I think it a bit 'anti-social' to hide usage of Python.

  http://www.bitpim.org/testhelp/3rdparty.htm

The reality is that users don't care what language your program was written in,
what development methodology you use, how hard it was to write, what editor you
use or how your environment enlightens your mind.  They do care that what you
produce works as expected.  In fact if it works really well, they may decide
to dig in deeper and try to emulate your language, methodology, procedures,
editors in what they do or may contribute to your project if it is open source.
That is the point at which Python matters.

In all these matters I think it is better to lead by example rather than try
to make people aware of things early in order to perform some sort of attempt
to gain mindshare.

Roger 




From daniel.dittmar at sap.corp  Mon Apr 25 05:59:42 2005
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Mon, 25 Apr 2005 11:59:42 +0200
Subject: Getting into Python, comming from Perl.
In-Reply-To: <mailman.2409.1114365369.1799.python-list@python.org>
References: <mailman.2409.1114365369.1799.python-list@python.org>
Message-ID: <d4if4h$g4k$1@news.sap-ag.de>

Miguel Manso wrote:
> I've tryed to use python some times but I get frustrated very quick. I 
> get myself many times needing to figure out how to loop through a list, 
> declare an associative array, checking how to pass named parameters to 
> functions, and simple things like that.

Create a cheat sheet with all those stock phrases that you know by heart 
in Perl, but have to look up in Python. That way, it's only one look. 
And you'll know them by heart soon enough.

You could also print out or keep bookmarks on the modules you use the 
most. When I started using Python, I did this for strings, regular 
expressions and the os and os.path modules.

Daniel


From steven.bethard at gmail.com  Thu Apr 28 16:22:28 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 28 Apr 2005 14:22:28 -0600
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <1114714105.582253.12150@f14g2000cwb.googlegroups.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
	<1114710873.292998.128090@f14g2000cwb.googlegroups.com>
	<1114714105.582253.12150@f14g2000cwb.googlegroups.com>
Message-ID: <uIydnXD17Z2c2-zfRVn-2A@comcast.com>

Lonnie Princehouse wrote:
> So far, we've been using the "key" parameter of list.sort.  If you want
> sort criteria more complicated than a single attribute, you can sort
> based on a custom comparison function.

Actually, the key= parameter can do anything the cmp= parameter can:

class Key(object):
     def __init__(self, item)
         self.item = item
     def __cmp__(self, other):
         # put your usual cmp code here
         cmp(self.item, other)
lst.sort(key=Key)

Of course this is a pretty silly way to write a cmp function.  But the 
point is that you shouldn't think of the key= parameter as only useful 
for simple comparisons. See
     http://mail.python.org/pipermail/python-list/2005-April/277448.html
for a recent example of a pretty complex key function.

I would guess that 80-90% of all uses of sort that need a custom 
comparison function can be met easily by using the key= parameter and 
will be more efficient than using the cmp= parameter.

The above "Key" example has the same inefficiency problems that the cmp= 
parameter normally does, but in most cases, you won't need to define a 
custom __cmp__ function, and you can rely on __cmp__ functions 
implemented in C, like those of strs and tuples (as I do below).

> So another way to do a sort-by-author for your books would be:
> 
>   def compare_authors(book1, book2):
>       return cmp(book1.author, book2.author)
> 
>    books.sort(compare_authors)

This is definitely not a case where you want to use a comparison 
function.  It will be much more efficient to write:

def author_key(book):
     return book.author
books.sort(key=author_key)

> A more complicated comparison function might nest two others:
> 
>   def compare_dates(book1, book2):
>       # Assuming that your dates are either numerical or are strings
> for which
>       # alphabetical sorting is identical to chronological...
>       return cmp(book1.date, book2.date)
> 
>   def compare_author_and_date(book1, book2):
>        different_authors = compare_authors(book1, book2)
>        if different_authors:  # different authors
>            return different_authors
>        else:  # same author.  sort by date.
>            return compare_dates(book1, book2)
>   
>   books.sort(compare_author_and_date)

Likewise, the above is basically just an inefficient way of writing:

def date_key(book):
     return book.data

def author_and_date_key(book):
     return (author_key(book), date_key(book))

books.sort(key=author_and_date_key)

Note that the thing I take advantage of here is that tuples are 
comparable, and compare as you'd expect them to (in lexicographic order).

STeVe


From cookedm+news at physics.mcmaster.ca  Tue Apr 12 15:46:13 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Tue, 12 Apr 2005 15:46:13 -0400
Subject: python/svn issues....
References: <mailman.1781.1113327900.1799.python-list@python.org>
Message-ID: <qnkpswzye0q.fsf@arbutus.physics.mcmaster.ca>

"bruce" <bedouglas at earthlink.net> writes:

> hi...
>
> in trying to get viewcvs up/running, i tried to do the following:
>
> [root at lserver2 viewcvs-0.9.2]# python
> Python 2.3.3 (#1, May  7 2004, 10:31:40)
> [GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import svn.repos
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File
> "/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
> /svn/repos.py", line 19, in ?
>   File
> "/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
> /svn/fs.py", line 28, in ?
>   File
> "/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
> /libsvn/fs.py", line 4, in ?
> ImportError: /usr/lib/libsvn_fs_base-1.so.0: undefined symbol: db_create

This looks like a problem when Subversion was built: this library was
not linked against the Berkeley DB libraries.

You can check what's linked using ldd, and see the unresolved symbols
with ldd -r. For instance, on my AMD64 Debian system,

$ ldd -r /usr/lib/libsvn_fs_base-1.so.0
        libsvn_delta-1.so.0 => /usr/lib/libsvn_delta-1.so.0 (0x0000002a95696000)
        libsvn_subr-1.so.0 => /usr/lib/libsvn_subr-1.so.0 (0x0000002a9579f000)
        libaprutil-0.so.0 => /usr/lib/libaprutil-0.so.0 (0x0000002a958c8000)
        libldap.so.2 => /usr/lib/libldap.so.2 (0x0000002a959e0000)
        liblber.so.2 => /usr/lib/liblber.so.2 (0x0000002a95b19000)
        libdb-4.2.so => /usr/lib/libdb-4.2.so (0x0000002a95c27000)
        libexpat.so.1 => /usr/lib/libexpat.so.1 (0x0000002a95e05000)
        libapr-0.so.0 => /usr/lib/libapr-0.so.0 (0x0000002a95f29000)
        librt.so.1 => /lib/librt.so.1 (0x0000002a9604e000)
        libm.so.6 => /lib/libm.so.6 (0x0000002a96155000)
        libnsl.so.1 => /lib/libnsl.so.1 (0x0000002a962dc000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x0000002a963f2000)
        libc.so.6 => /lib/libc.so.6 (0x0000002a96506000)
        libdl.so.2 => /lib/libdl.so.2 (0x0000002a96746000)
        libcrypt.so.1 => /lib/libcrypt.so.1 (0x0000002a96849000)
        libresolv.so.2 => /lib/libresolv.so.2 (0x0000002a9697c000)
        libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x0000002a96a91000)
        libgnutls.so.11 => /usr/lib/libgnutls.so.11 (0x0000002a96ba8000)
        /lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x000000552aaaa000)
        libtasn1.so.2 => /usr/lib/libtasn1.so.2 (0x0000002a96d1b000)
        libgcrypt.so.11 => /usr/lib/libgcrypt.so.11 (0x0000002a96e2b000)
        libgpg-error.so.0 => /usr/lib/libgpg-error.so.0 (0x0000002a96f77000)
        libz.so.1 => /usr/lib/libz.so.1 (0x0000002a9707b000)

If it doesn't look like that, then I'd say your Subversion package was
built badly. You may also want to run ldd on your svn binary, to see what
libraries it pulls in.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From Scott.Daniels at Acm.Org  Tue Apr 12 14:51:58 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 12 Apr 2005 11:51:58 -0700
Subject: variables exist
In-Reply-To: <mailman.1775.1113323764.1799.python-list@python.org>
References: <9622d535.0504110552.1e070e8d@posting.google.com>	<d3e0jj$93d$1@sea.gmane.org>	<mailman.1703.1113237192.1799.python-list@python.org>	<d3g2fb$76m$1@blackmamba.itd.rl.ac.uk>
	<mailman.1775.1113323764.1799.python-list@python.org>
Message-ID: <425c1353$1@nntp0.pdx.net>

Brian van den Broek wrote:
>... STeVe stressed that the try/except solution is only really appropriate 
> for cases where the failure to have the variable defined is quite rare. 

Beware: C++ and Java have an immense overhead for exceptions.  Python
has a very lightweight exception mechanism.  You should _very_seldom_
choose exceptions or not on the basis of performance without measuring
the actual use; you are sure to be surprised.

Structure your code to be easiest to understand.  _If_ it is too slow,
investigate ways to improve its performance.  The usual way is to
build better data structures and use better algorithms.  Only in the
core of a frequently used inner loop should you even care about the
cost of exceptions.  Even then, you can often lift the exception
handler around the loop and recover the most necessary performance.

--Scott David Daniels
Scott.Daniels at Acm.Org


From ville at spammers.com  Wed Apr  6 16:07:42 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 23:07:42 +0300
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<xqxll7wougu.fsf@cola2.ca.boeing.com>
	<mailman.1437.1112801727.1799.python-list@python.org>
	<1112805967.208689.96100@o13g2000cwo.googlegroups.com>
Message-ID: <du74qej3bzl.fsf@mozart.cc.tut.fi>

>>>>> "caneff" == ChinStrap  <caneff at gmail.com> writes:

    caneff> Anyone want to send me a configuration setup with Python
    caneff> in mind, and decent colors?

http://www.emacswiki.org/cgi-bin/wiki/ColorTheme

-- 
Ville Vainio   http://tinyurl.com/2prnb


From paul at fxtech.com  Thu Apr 28 15:46:11 2005
From: paul at fxtech.com (Paul Miller)
Date: Thu, 28 Apr 2005 14:46:11 -0500
Subject: embedding an interactive console
Message-ID: <n3bce.1944$dl5.384@fe58.usenetserver.com>

I did this YEARS ago with Python 1.5, and I recall it being slightly 
painful. I have an embedded Python interpreter and I want to provide an 
interactive console (implemented in my GUI application with a Qt 
TextEdit widget). I can handle the GUI part of it, but I'm wondering 
what the latest Python method of implementing this is.

I note the documentation for InteractiveConsole, which is implemented in 
Python. Is there any example code for using this from within C/C++ code 
to emulate the command-line interpreter inside a GUI app?



From tdelaney at avaya.com  Wed Apr  6 21:07:52 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 7 Apr 2005 11:07:52 +1000
Subject: the bugs that try men's souls
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0252049B@au3010avexu1.global.avaya.com>

Jordan Rastrick wrote:

> I had a doozy myself the other night, writing a mergesort for python's
> deque class (I can't believe it doesnt come with one!)....

Post it to the Cookbook ... ;)

Tim Delaney


From tim.leeuwvander at nl.unisys.com  Mon Apr 18 07:49:06 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 18 Apr 2005 04:49:06 -0700
Subject: Removing dictionary-keys not in a set?
Message-ID: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>

Hi,

I'd like to remove keys from a dictionary, which are not found in a
specific set. So it's kind of an intersection-operation.

I can create a new dictionary, or a loop over all keys and test them
for set-membership, but I was wondering if there was a smart way to
express this in 1 or 2 concise statements that I'm not aware of.

So are there smarter ways to get the intersection of dictionary and set
into a dictionary than the following pseudo-code:

# Variation 1
d2 = {}
for key in s: d2[key] = d1[key]

# Variation 2
for key in d.iterkeys(): if key not in s: del d[key]


And if there's no smarter way, then which of these two options would
give best performance?

Cheers,

--Tim



From martin at v.loewis.de  Wed Apr 27 14:49:04 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 27 Apr 2005 20:49:04 +0200
Subject: bytecode non-backcompatibility
In-Reply-To: <d4nrhu$rl3$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org> <426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
Message-ID: <426fdea1$0$31536$9b622d9e@news.freenet.de>

Maurice LING wrote:
> So if C extension API (or whatever that is really called) is stable, the
> system admin can just copy all of /sw/lib/python2.3/site-packages into
> /sw/lib/python2.4/site-packages and it should work. 

It would be counter-productive to make it stable, as this would render
certain desirable changes impossible. Backwards compatibility on C API
(source) level is a goal, binary compatibility within a 2.x release
is a goal, binary compatibility across 2.x releases is not.

[automatically install a set of packages]
> What do you think?

That would certainly be possible. Contributions are welcome.

Regards,
Martin


From bokr at oz.net  Sat Apr 23 12:51:13 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 23 Apr 2005 16:51:13 GMT
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
	<1114188913.806103.120830@f14g2000cwb.googlegroups.com>
	<4269397e.249385737@news.oz.net>
	<1114229764.079444.145570@g14g2000cwa.googlegroups.com>
Message-ID: <426a7882.331053609@news.oz.net>

On 22 Apr 2005 21:16:04 -0700, pyguy2 at gmail.com wrote:

>>>I think of it like the ''.join semantics. The object knows best how
>to
>>>handle join (even if it looks wierd to some people). In the #! case,
>>>the program knows best how to start itself.
>
>>This I don't understand ;-)
>
>With  ','.join(['a','b','c'])    You rely on what wants to join the
>sequence to handle the issue of joining rather than have the sequence
>understand joining. I think of it as the object knows best.
>
>I think of  #! as "the program knowing best" how to startup, rather
>than having to rely on something else to deal with it. I also like the
My point was that the "program" -- whether script or executable --
_is_ depending on something else, i.e., whatever is launching it
in an appropriate environment, and my real point was that the launcher
looks at the beginning of the file contents to check what to do, rather
than looking at separate file metadata. I am objecting to embeddeding
metadata in data. The convention of using a first #! line in scripts
as metadata and passing the whole script to whatever interpreter
means that the interpreters have to know to ignore the first line
--usually meaning the '#' is a comment line start. Or else it has
to be told with a command line option like python's -x to ignore
extraneous metadata. Carrying metadata in file names and extensions
is not better, just different, and brings a bag of problems, like
having no identifier for the data per se, just its various containers.

>text based simplicity and explictness. Just like text based "etc" files
>on unix versus the registry in windows. And, if you want you can add
>more power like use env variables in #!.
>It can be as simple or as powerful as you need, you can use whatever
>means you want to manage the #! line: text editors, other programs,
>etc.  It is data-centric, just like http, sql, file I/O rather than
>verb-centric (learn another whole set of methods to figure out how to
>change startup).
I don't disagree about the usefulness of various text data, I just
want to distinguish data from metadata and container identifiers
from data identifiers.
>
>hopefully I am making sense,
>
I think we were just looking a different aspects of the elephant ;-)

Regards,
Bengt Richter


From baas at ira.uka.de  Fri Apr 15 16:45:31 2005
From: baas at ira.uka.de (Matthias Baas)
Date: Fri, 15 Apr 2005 22:45:31 +0200
Subject: ANN: Python Computer Graphics Kit v2.0.0alpha3
Message-ID: <et90619o6qns15v5t951o4hs811lnspl48@4ax.com>

The third alpha release of version 2 of the Python Computer Graphics
Kit is available at http://cgkit.sourceforge.net


What is it?
-----------

The Python Computer Graphics Kit is a generic 3D package written in
C++ and Python that can be used for a variety of domains such as
scientific visualization, photorealistic rendering, Virtual Reality or
even games. The package contains a number of generic modules that can
be useful for any application that processes 3D data. This includes
new types such as vectors, matrices and quaternions. Furthermore, the
package can read and store 3D models in memory where they can be
manipulated by Python programs. The kit comes with tools that can be
used to display the scene either interactively or by rendering it
offline via a RenderMan renderer.


What's new?
-----------

- New polyhedron geometry (made up of general concave polygons that
may have holes)
- New storage classes FACEVARYING and FACEVERTEX for primitive
variables
- OBJ import and export (including the material files)
- OFF export and improved import
- ASF/AMC import
- BVH import
- an additional maxscript that exports a Biped skeleton and motion
into ASF/AMC

+ several smaller enhancements and bugfixes (see changelog)


Windows binary versions are available for Python 2.3 and Python 2.4.


For more information, visit:

http://cgkit.sourceforge.net


- Matthias -



From deetsNOSPAM at web.de  Thu Apr 21 12:43:32 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 21 Apr 2005 18:43:32 +0200
Subject: recording data between [ and ]
References: <d488q5$apl$1@solaris.cc.vt.edu><UbqdnXB1cNHtLvrfRVn-rw@powergate.ca><d48cpb$hij$1@solaris.cc.vt.edu>
	<d48fc1$2rm$00$1@news.t-online.com>
	<mailman.2227.1114096685.1799.python-list@python.org>
Message-ID: <d48l7f$ump$05$1@news.t-online.com>

Fredrik Lundh wrote:

> Diez B. Roggisch wrote:
> 
>> Welcome to the wonderful world of programming. Regular expressions are
>> what they are because they are modeled after a certain theory - that of
>> finite state automata and their correspondence to certain classes of
>> grammars.
> 
> (except that Python regexps are not always regular, of course.  and that
> back- tracking engines like the ones used in Perl and Python differs in
> subtle ways
> from "real" DFA-based engines, etc.  but as long as you're looking at
> things from a proper distance, you're right, of course)

They use backtracking? Thats news to me. I always thought that mechanisms
like prefixes and backreferences can work in a strict DFA paragigm - with
possibly very large automata, but nevertheless.

Gotta go google I think....

-- 
Regards,

Diez B. Roggisch


From peter at engcorp.com  Wed Apr 20 11:10:21 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 11:10:21 -0400
Subject: random number between 0 and 20
In-Reply-To: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
References: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
Message-ID: <_c-dnaseE4DQ7vvfRVn-3A@powergate.ca>

aleksander.helgaker at gmail.com wrote:
> How can I generate a random number between 0 - 20 and store the number
> in nrrandom?

You would use the "random" module from the standard
library.  It has a randint() method that should do
the job.  Read the docs for more.

Assigning to nrrandom?  Is that just a variable
name?  Have you read the tutorial, which covers
basic things like assignment?

-Peter


From michele.simionato at gmail.com  Fri Apr 29 08:53:15 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 29 Apr 2005 05:53:15 -0700
Subject: anonymous function objects?
In-Reply-To: <d4t6qd$v9s$1@news2.rz.uni-karlsruhe.de>
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
	<d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
	<1114746052.411476.129880@o13g2000cwo.googlegroups.com>
	<d4t6qd$v9s$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1114779195.020178.302110@g14g2000cwa.googlegroups.com>

I have not access to Guido's time machine!

           M. S.



From bill.mill at gmail.com  Wed Apr  6 13:33:09 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 6 Apr 2005 13:33:09 -0400
Subject: shebang in cross platform scripts
In-Reply-To: <4253FB0A.7EF0B8CA@pauahtun.org>
References: <d30om0$lb4$1@solaris.cc.vt.edu>
	<8c7f10c605040607015d7cb7d5@mail.gmail.com>
	<4253FB0A.7EF0B8CA@pauahtun.org>
Message-ID: <797fe3d405040610333b200b59@mail.gmail.com>

On Apr 6, 2005 11:06 AM, Ivan Van Laningham <ivanlan at pauahtun.org> wrote:
> Hi All--
> 
> Simon Brunning wrote:
> >
> > On Apr 6, 2005 2:37 PM, rbt <rbt at athop1.ath.vt.edu> wrote:
> >
> > > Does the line below have any negative impact on Windows machines? I
> > > develop and test mostly on Unix, but my scripts are often used on Win
> > > systems too.
> > >
> > > #!/usr/bin/env python
> >
> > Nope. On Windows it's just a comment.
> >
> 
> It works fine using cygwin, uwin, mks and pdksh, all available for
> Windows.  Google is your friend.
> 
> Symbolic links also work under uwin (don't know for sure about the
> others).  That means you can install a link in /usr/bin to whereever
> python lives, and expect #!/usr/bin/python to work just fine.

This works in cygwin as well; I didn't mention cygwin since the OP
seemed to be asking about windows distribution, but it's a good point.

Peace
Bill Mill


From max at alcyone.com  Fri Apr  1 16:12:07 2005
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 01 Apr 2005 13:12:07 -0800
Subject: Ternary Operator in Python
In-Reply-To: <9l1r41tes7n87d16ou3hibff02tkh9p1pj@4ax.com>
References: <mailman.1172.1112340286.1799.python-list@python.org>
	<9l1r41tes7n87d16ou3hibff02tkh9p1pj@4ax.com>
Message-ID: <CeGdnVzzxMK6JNDfRVn-2Q@speakeasy.net>

Ron_Adam wrote:

> I've used boolean opperations to do it.
> 
> 	result = (v == value) * first + (v != value) * second
> 
> Same as:
> 
> 	if v == value: result = first else: result = second

No, it isn't, because it isn't short circuiting.  If first or second had 
side effects, then the two would not be equivalent.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   If the sun comes up / And you're not home / I'll be strong
   -- India Arie


From kay.schluehr at gmx.net  Mon Apr 11 12:13:50 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 11 Apr 2005 09:13:50 -0700
Subject: Behavioural identity - a short discussion
In-Reply-To: <mailman.1661.1113190516.1799.python-list@python.org>
References: <1113165441.978711.64860@z14g2000cwz.googlegroups.com>
	<mailman.1661.1113190516.1799.python-list@python.org>
Message-ID: <1113236030.046290.47860@o13g2000cwo.googlegroups.com>

Terry Reedy wrote:
> "Kay Schluehr" <kay.schluehr at gmx.net> wrote in message
> news:1113165441.978711.64860 at z14g2000cwz.googlegroups.com...
> > class A(object):
> >    def __init__(self):
> >        raise NotImplemented
> >
> > We can regard class A as a "pure abstract" class. It is impossible
to
> > create instances of A.
>
> You see that parameter 'self'?  When __init__ is called, it is bound
to an
> already created instance of A.

Yes. I've forgotten.

This would make sense and instantiable subclasses have to override
__new__.

class A(object):
    def __new__(cls):
        raise NotImplemented

    def __init__(self):
        self.x = 0

> How soon the last reference goes away I am
> not sure.  If you change the raise statement to 'raise
> SomeException(self)', then that instance will become bound to the
'args'
> attribute of the resulting exception object.  That exception object
can in
> turn be get captured by an 'except SomeException, obj' statement.
The
> binding of 'obj' persists after the except statement.

I considered the statement "raise Implemented" as kind of pattern: an
implementation that is at the same time a "declaration" for some client
who understands behavioural equivalence. One can not go much further
with the idea of scripting :)

On the other hand for real applications it may be wiser to use
decorators, because they are a standard and easy to use and to
understand.

This one would be completely appropriate:

def not_implemented(f):
    setattr(f,"not_implemented",True)
    return f

class A(object):
   @not_implemented
   def f(self):
       pass


Allthough this one

class A(object):
   def f(self):
       raise NotImplemented

would be minimalistic and somehow innocent.

> To abort object creation, write a metaclass with __new__ and raise an

> exception there.

Yes.

>
> > Thinking in Python makes live easier because we can not only
> > check interfaces superficially but we can inspect the code and we
can
> > compare two code-objects on the behavioural level with a certain
> > accuracy.
>
> You are actually thinking in terms of the CPython implementation, not

> Python itself, which is fine as long as you don't expect
CPython-specific
> introspection to work with other implementations.  But it is pretty
neat
> sometimes.
>
> Terry J. Reedy

I think it is scripting putting to the extreme. I don't know much about
the introspective capabilities of Jython and IronPython because I don't
use them but without them not even a variant of Pychecker will work for
either of the two Pychecker versions ( i.e. AST / bytecode ).

Ciao,
Kay



From dav.josty at pasemail  Sat Apr  9 16:42:17 2005
From: dav.josty at pasemail (David Josty)
Date: Sat, 9 Apr 2005 22:42:17 +0200
Subject: wsh and Python 
Message-ID: <42583de2$0$6791$626a14ce@news.free.fr>

Hello

I have this function :
--------------------------------------------------------
import sys
import win32com.client
import win32api

def close_softawre("name")
    shell = win32com.client.Dispatch("WScript.Shell")
    shell.AppActivate ("name")
    win32api.Sleep(100)
    shell.SendKeys ("%{F4}")
--------------------------------------------------------- 
But sometimes i have any problemes, the programme is not activate a time !!!


==> this is wsh !! i don't know translate in python

Do while WshShell.AppActivate ("name") = FALSE
     wscript.sleep 100
loop

Thank a lot

a french guy




From xah at xahlee.org  Sun Apr 17 09:24:26 2005
From: xah at xahlee.org (Xah Lee)
Date: 17 Apr 2005 06:24:26 -0700
Subject: unicode "em space" in regex
In-Reply-To: <4261442D.1010800@v.loewis.de>
References: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>
	<4261442D.1010800@v.loewis.de>
Message-ID: <1113744266.026254.183300@o13g2000cwo.googlegroups.com>

Thanks. Is it true that any unicode chars can also be used inside regex
literally?

e.g.
re.search(ur'?+',mystring,re.U)

I tested this case and apparently i can. But is it true that any
unicode char can be embedded in regex literally. (does this apply to
the esoteric ones such as other non-printing chars and combining
forms...)

----
Related...:

The official python doc:
 http://python.org/doc/2.4.1/lib/module-re.html
says:

"Regular expression pattern strings may not contain null bytes, but can
specify the null byte using the \number notation."

What is meant by null bytes here? Unprintable chars?? and the "\number"
is meant to be decimal? and in what encoding?

 Xah
 xah at xahlee.org
? http://xahlee.org/



From fredrik at pythonware.com  Sun Apr 24 14:55:56 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 20:55:56 +0200
Subject: opening new window in one window using Tkinter -- Help please
References: <1114365774.690048.280150@l41g2000cwc.googlegroups.com><mailman.2414.1114367330.1799.python-list@python.org>
	<1114368587.303696.90130@l41g2000cwc.googlegroups.com>
Message-ID: <d4gpq1$nk2$1@sea.gmane.org>

"Clara" wrote:

> Well, but where do I call withdraw?

when you want the new window to appear, and the old one to
go away, of course.  something like this, perhaps?

  from mainmenu import FileManager
  app2 = FileManager(self.username.get())
  app2.master.title("File Manager")
  app2.master.maxsize("400,1500")
- app2.mainloop()
+ app.master.withdraw()

</F>





From bokr at oz.net  Wed Apr  6 03:34:15 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 06 Apr 2005 07:34:15 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<4252fec3@nntp0.pdx.net>
	<1112754535.800594.127430@g14g2000cwa.googlegroups.com>
Message-ID: <42538190.432027552@news.oz.net>

On 5 Apr 2005 19:28:55 -0700, "El Pitonero" <pitonero at gmail.com> wrote:

>Scott David Daniels wrote:
>> Ron_Adam wrote:
>> > ...
>>
>>      def tweakdoc(name):
>>          def decorator(function):
>> 	    function.__doc__ = 'Tweak(%s) %r' % (name, function.__doc__)
>> 	    return function
>>          return decorator
>>
>> What is confusing us about what you write is that you are referring
>to
>> tweakdoc as a decorator, when it is a function returning a decorator.
>
>"Decorator factory" would be a shorter name for "a function returning a
>decorator".
>
True, but tweakdoc doesn't have to be a function, so IMO we need a better
name for the @-line, unless you want to use many various specific names
like factory. E.g.,

(Preliminary definition):

 >>> class Deco(object):
 ...     class __metaclass__(type):
 ...         def __getattribute__(cls, name):
 ...             if hasattr(type(cls), name): return type.__getattribute__(cls, name)
 ...             def decorator(f):
 ...                 f.func_name = '%s_%s'%(f.func_name, name)
 ...                 return f
 ...             return decorator
 ...
 >>> deco = Deco

Ok, now what do you call this @-line? Freaky decorator factory invocation?
Decoratoriferous expression? ;-) Lexical decoration?
Decorator{-producing,-generating, ??} expression ?

Decorator expression for short? vs the decorator callable produced.

 >>> @deco.one
 ... def foo(): pass
 ...
 >>> foo
 <function foo_one at 0x02EE8E2C>
 >>> @deco.three
 ... @deco.two
 ... def bar():pass
 ...
 >>> bar
 <function bar_two_three at 0x02EE8E9C>

Regards,
Bengt Richter


From sunnan at handgranat.org  Fri Apr  1 22:22:25 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sat, 02 Apr 2005 03:22:25 GMT
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design Flaw
In-Reply-To: <d2kqqt$ss7$1@panix2.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
Message-ID: <Rdo3e.21051$d5.155911@newsb.telia.net>

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

Can anyone please point me to the text that quote was taken from? I 
tried to use a search engine but I only found quotations, not the source.
Sunnan


From steven.bethard at gmail.com  Sat Apr 16 17:20:13 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 16 Apr 2005 15:20:13 -0600
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <mailman.1997.1113635188.1799.python-list@python.org>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>	<42607b0f$1_2@newspeer2.tds.net>
	<mailman.1997.1113635188.1799.python-list@python.org>
Message-ID: <ctWdnTWjX6gaHPzfRVn-oQ@comcast.com>

Shane Hathaway wrote:
> I like this PEP a lot, but your concern is valid.  Maybe Brian could
> modify the PEP slightly to disambiguate.  How about using an ellipsis in
> the argument list to signify suite-based keywords?  Examples:
> 
> f(...):
>     x = 1
> 
> class C(object):
>    x = property(...):
>       doc = "I'm the 'x' property."
>       def fget(self):
>          return self.__x
>       def fset(self, value):
>          self.__x = value
>       def fdel(self):
>          del self.__x
> 
> d = dict(...):
>     a = 1
>     b = 2

I also like the ellipsis idea much better than the original proposal. 
While I figured out what the original syntax meant after half a minute 
of staring at it (unlike the thunk proposal which I still can't decode), 
I couldn't help but feel that I'd like a visual cue that arguments had 
been omitted.  Seeing
     f():
gives me only ':' as a tiny clue that arguments have been omitted.  And 
':' is used in all Python suites, so it doesn't have a good intuition 
associated with it.  Using ellipsis or something similar to indicate 
that keyword arguments have been omitted would make this much easier for 
me to read.

STeVe


From bearophileHUGS at lycos.com  Sun Apr  3 10:31:51 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Apr 2005 07:31:51 -0700
Subject: On slashdot
Message-ID: <1112538711.237377.308100@l41g2000cwc.googlegroups.com>

There is a discussion about "Python Moving into the Enterprise" on
Slashdot:

http://it.slashdot.org/it/05/04/03/0715209.shtml?tid=156&tid=8

Bearophile



From philippe at philippecmartin.com  Wed Apr 20 12:37:59 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Wed, 20 Apr 2005 16:37:59 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
	<dqCdneECDr445vvfRVn-tA@powergate.ca>
	<116d16et9de2146@corp.supernews.com>
Message-ID: <Hzv9e.884$l45.502@newssvr12.news.prodigy.com>

Loop bodies (for break)


Grant Edwards wrote:

> On 2005-04-20, Philippe C. Martin <philippe at philippecmartin.com> wrote:
> 
>> Although I find them 'cleaner' than goto, would not use goto,
>> and certainly do use 'return' in the middle of functions, I
>> also agree that some people might think the former do reduce
>> code readibility - ex: I , somehow, do not feel good using
>> 'continue' and 'break'.
> 
> Do you just avoid switch() statements?  Or are you referring
> only to loop bodies?
> 



From steve at holdenweb.com  Wed Apr 20 13:05:54 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 20 Apr 2005 13:05:54 -0400
Subject: Python Win32 Extensions and Excel 2003. OL 11.0 Supported?
In-Reply-To: <1114012496.533936.297580@l41g2000cwc.googlegroups.com>
References: <1114012496.533936.297580@l41g2000cwc.googlegroups.com>
Message-ID: <d461tf$5uf$1@sea.gmane.org>

Mudcat wrote:
> Howdy,
> 
> I could have sworn I downloaded a version of python win that supported
> object library 11.0 at some point. However I just downloaded versions
> 204 and 203, and the highest version they have is OL 9.0.
> 
> Does anyone know if this is a mistake or if Excel 2003 isn't yet
> supported with the extensions?
> 
I was under the impression that makepy just listed the libraries it 
found on the system it ran on. Is this wrong?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fredrik at pythonware.com  Thu Apr 21 11:27:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 17:27:59 +0200
Subject: deprecation of has_key?
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>	<mailman.2224.1114094137.1799.python-list@python.org>	<TIKdnV6iPosyIPrfRVn-2w@comcast.com><mailman.2226.1114095804.1799.python-list@python.org>
	<dfWdnZdcUZbqX_rfRVn-vw@comcast.com>
Message-ID: <d48ghi$h5q$1@sea.gmane.org>

Steven Bethard wrote:

>> For me dictionary is a collection of key-value pairs, but not a
>> collection of keys (that's what set is).
> 
> Ahh, ok.  Now I understand.  I think you could probably search the 
> python-dev archives and see why the decision was made as it was.  For 
> pretty much all my purposes, "key in dict" is much more useful than 
> "item in dict".  Practicality beats Purity and all. ;)

well, for all my purposes, I find that "dict.get(key)" (or sometimes "dict[key]"
is a lot more useful than has_key and in...

</F>



From tiissa at nonfree.fr  Mon Apr 18 15:00:23 2005
From: tiissa at nonfree.fr (tiissa)
Date: Mon, 18 Apr 2005 21:00:23 +0200
Subject: Pattern Matching Given # of Characters and no String Input; use
 RegularExpressions?
In-Reply-To: <ae0b1ff7.0504171712.731fabd3@posting.google.com>
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
	<42623ba8$0$10322$636a15ce@news.free.fr>
	<ae0b1ff7.0504171712.731fabd3@posting.google.com>
Message-ID: <426403c7$0$773$626a14ce@news.free.fr>

Synonymous wrote:
> tiissa <tiissa at nonfree.fr> wrote in message news:<42623ba8$0$10322$636a15ce at news.free.fr>...
> 
>>tiissa wrote:
>>
>>>If you know the number of characters to match can't you just compare 
>>>slices?
>>
>>If you don't, you can still do it by hand:
>>
>>In [7]: def cmp(s1,s2):
>>   ....:     diff_map=[chr(s1[i]!=s2[i]) for i in range(min(len(s1), 
>>len(s2)))]
>>   ....:     diff_index=''.join(diff_map).find(chr(True))
>>   ....:     if -1==diff_index:
>>   ....:         return min(len(s1), len(s2))
>>   ....:     else:
>>   ....:         return diff_index
>>   ....:
> 
> I will look at that, although if i have 300 images i dont want to type
> all the comparisons (In [9]: cmp('ccc','cccap')) by hand, it would
> just be easier to sort them then :).

I didn't meant you had to type it by hand. I thought about writing a 
small script (as opposed to using some in the standard tools). It might 
look like:

In [22]: def make_group(L):
    ....:     root,res='',[]
    ....:     for i in range(1,len(L)):
    ....:         if ''==root:
    ....:             root=L[i][:cmp(L[i-1],L[i])]
    ....:             if ''==root:
    ....:                 res.append((L[i-1],[L[i-1]]))
    ....:             else:
    ....:                 res.append((root,[L[i-1],L[i]]))
    ....:         elif len(root)==cmp(root,L[i]):
    ....:             res[-1][1].append(L[i])
    ....:         else:
    ....:             root=''
    ....:     if ''==root:
    ....:         res.append((L[-1],[L[-1]]))
    ....:     return res
    ....:

In [23]: L=['cccat','cccap','cccan','dddfa','dddfg','dddfz']

In [24]: L.sort()

In [25]: make_group(L)
Out[25]: [('ccca', ['cccan', 'cccap', 'cccat']), ('dddf', ['dddfa', 
'dddfg', 'dddfz'])]


However I guarantee no optimality in the number of classes (but, hey, 
that's when you don't specify the size of the prefix).
(Actually, I guarantee nothing at all ;p)
But in particular, you can have some file singled out:

In [26]: make_group(['cccan','cccap','cccat','cccb'])
Out[26]: [('ccca', ['cccan', 'cccap', 'cccat']), ('cccb', ['cccb'])]


It is a matter of choice: either you want to specify by hand the size of 
the prefix and you'd rather look at itertools as pointed out by Kent, or 
you don't and a variation with the above code might do the job.


From onurb at xiludom.gro  Wed Apr  6 04:47:51 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Wed, 06 Apr 2005 10:47:51 +0200
Subject: Best editor?
In-Reply-To: <mailman.1416.1112759859.1799.python-list@python.org>
References: <mailman.1416.1112759859.1799.python-list@python.org>
Message-ID: <4253a239$0$11600$636a15ce@news.free.fr>

jstroud at mbi.ucla.edu wrote:
> On Tuesday 05 April 2005 11:22 am, ChinStrap wrote:
> 
>>I keep hearing everyone say Emacs, but I can't understand it at all.
> 
> 
> Both emacs and vi suffer from the fact that they can not be used by ordinary
> humans. 

My my my... I'm sorry to learn I'm not an ordinary human :(

> Thus, I recommend using either to impress your friends.

Err... most of my friend not being coders, they don't even have a clue 
about what are emacs and vim, so they're not really impressed. The other 
are coders and use either vim or emacs or both, so they're not really 
impressed either...

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


From theller at python.net  Tue Apr  5 09:56:12 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 05 Apr 2005 15:56:12 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com>
	<mailman.1280.1112603141.1799.python-list@python.org>
	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>
	<mailman.1299.1112626394.1799.python-list@python.org>
	<4251d375$0$23625$9b622d9e@news.freenet.de>
	<d2u0t9$lbp$1@solaris.cc.vt.edu>
Message-ID: <ll7x1g5f.fsf@python.net>

rbt <rbt at athop1.ath.vt.edu> writes:

> Martin v. L?wis wrote:
>
>> Of course, it is not all that clear what the OP actually wanted.
>> For all we know, he wanted to "alternate quickly (with batch
>> file or similary) between python23 and python24"...
>
> Maybe off-topic for this thread, but I noticed that when installing
> 2.4.1 that 2.4.0 is automatically removed. Does 2.4 do the same thing
> to 2.3 versions?

No.

2.4 and 2.3 (and other versions) can coexist.

Thomas


From jjl at pobox.com  Sun Apr 24 08:03:15 2005
From: jjl at pobox.com (John J. Lee)
Date: 24 Apr 2005 12:03:15 +0000
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com> <FtCdneI1TKgS8vTfRVn-1w@powergate.ca>
	<42697785$0$2594$da0feed9@news.zen.co.uk>
Message-ID: <87oec4qt4s.fsf@pobox.com>

Will McGugan <news at NOwillmcguganSPAM.com> writes:

> Peter Hansen wrote:
> > John J. Lee wrote:
> >
> >> I will never pronounce thorough 'thurrow', though.  One must draw a
> >> line.
> > How *do* you pronounce it?  "Thurrow" seems to match
> > how I say the word, along with everyone else I've
> > ever met (until now?).
> 
> I would pronounce it like 'thurra', since I'm Scottish.

Me too (England).


> It always
> makes me cringe when Americans pronounce 'Edinburgh' as 'edin-burrow'
> rather then 'edin-burra'.

Edin-br.  (There's a short vowel (a "schwa"?) on the end there that I
missed off because there's no unambigous ASCII symbol for it... But
it's the same vowel a child uses - at least in England! - to say "r"
when running through the alphabet, before they've learned the names
(ay bee cee dee) for the letters.)


John


From tjreedy at udel.edu  Thu Apr 21 18:04:58 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 18:04:58 -0400
Subject: deprecation of has_key?
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>	<426775C8.3000303@holdenweb.com>	<mailman.2224.1114094137.1799.python-list@python.org>	<TIKdnV6iPosyIPrfRVn-2w@comcast.com><mailman.2226.1114095804.1799.python-list@python.org>
	<dfWdnZdcUZbqX_rfRVn-vw@comcast.com>
Message-ID: <d497pq$4v3$1@sea.gmane.org>


"Steven Bethard" <steven.bethard at gmail.com> wrote in message 
news:dfWdnZdcUZbqX_rfRVn-vw at comcast.com...
> Ahh, ok.  Now I understand.  I think you could probably search the 
> python-dev archives and see why the decision was made as it was.  For 
> pretty much all my purposes, "key in dict" is much more useful than "item 
> in dict".  Practicality beats Purity and all. ;)

In '[for] x in mydict:', x could potentially be key, value, or item-pair. 
All three were considered and discussed -- I believe on clp-- and key 
chosen as the most useful.  A specific analogy brought forth was the phone 
book, a mapping of names to phone number and maybe address.  The decision 
was definite closer to a coin-toss to a no-brainer.

Terry J. Reedy





From martin.witte at gmail.com  Thu Apr 21 16:44:37 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 21 Apr 2005 13:44:37 -0700
Subject: New line
In-Reply-To: <42680edf_3@mk-nntp-2.news.uk.tiscali.com>
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
	<mailman.2246.1114115139.1799.python-list@python.org>
	<42680edf_3@mk-nntp-2.news.uk.tiscali.com>
Message-ID: <1114116277.575910.172080@f14g2000cwb.googlegroups.com>

okay, you type your code in idle, and run your code by hitting the F5
key?



From jason at tishler.net  Sat Apr 30 10:39:28 2005
From: jason at tishler.net (Jason Tishler)
Date: Sat, 30 Apr 2005 10:39:28 -0400
Subject: Fwd: how to find the drive in python/cygwin?
In-Reply-To: <4273883C.B25B19B0@pauahtun.org>
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
	<3511dc7505042617524edd244a@mail.gmail.com>
	<426EE4B8.6910F6DD@pauahtun.org>
	<20050430132423.GA2824@tishler.net>
	<4273883C.B25B19B0@pauahtun.org>
Message-ID: <20050430143928.GB2824@tishler.net>

Ivan,

On Sat, Apr 30, 2005 at 07:29:32AM -0600, Ivan Van Laningham wrote:
> Jason Tishler wrote:
> > On Tue, Apr 26, 2005 at 07:02:48PM -0600, Ivan Van Laningham wrote:
> > > Use win32api to find drives:
> > >
> > > ====cut here====
> > > #!/usr/bin/python
> > > # -*- coding: utf-8 -*-
> > >
> > > import os
> > > import os.path
> > > import win32api
> > > [snip]
> > 
> > AFAICT, the win32api module has not been ported to Cygwin Python.
> > 
> 
> I'm not running Cygwin, but Uwin.  I installed regular Python:
> 
> Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> ^Z                                      
> 
> with the win32api that matched.  I have no trouble running it.  Is
> there some reason to prefer a Python compiled by the Cygwin tools?

It depends on your needs.  If you are looking for a more Unix-like
Python, then the Cygwin version would probably be better.  If
Windows-like, then the native Windows version would probably be better.

The OP seem to be interested in a Cygwin Python solution -- not a
Windows one.  So, I was just clarifying that the win32api module is not
supported under Cygwin Python.

Jason

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


From percivall at gmail.com  Tue Apr  5 22:43:40 2005
From: percivall at gmail.com (Simon Percivall)
Date: 5 Apr 2005 19:43:40 -0700
Subject: os.path query functions behavior incorrect?
References: <YNy4e.25743$k66.11680@trnddc03>
Message-ID: <1112755420.148935.69980@g14g2000cwa.googlegroups.com>

> These to me are I/O errors that should result in an exception.
> Doing a command line dir a:\ reports "The system cannot find
> the path specified."

The functions use the underlying C library, and in this case, the
result is not guaranteed by the standard.



From bernadal2008 at yahoo.fr  Wed Apr 20 17:54:11 2005
From: bernadal2008 at yahoo.fr (Bernard A.)
Date: 20 Apr 2005 14:54:11 -0700
Subject: inner sublist positions ?
Message-ID: <9468aec7.0504201354.7e6d84cf@posting.google.com>

hello, 

while trying to play with generator, i was looking for an idea to get
the position of a inner list inside another one, here is my first idea
:
- first find position of first inner element, 
- and then see if the slice starting from here is equal to the inner
->

>>> def subPositions(alist, innerlist):
	if innerlist == []:
		return
	first, start = innerlist[0], 0
	while 1:
		try:
			p = alist[start:].index(first)
		except ValueError:
			break # or should i better use return ?
		start = start + p		
		if alist[start: start + len(innerlist)] == innerlist:
			yield start, start + len(innerlist)
		start += 1

		
>>> list(subPositions(range(5) + range(5), [2,3]))
[(2, 4), (7, 9)]

maybe have you some better / faster ideas / implementations ? or even
a more pythonic to help me learning that

game2 :) => how can i imagine a way to have the inclusion test rather
be a test upon a regular expression ? i mean instead of checking for
an inner list, rather checking for an "inner regular expression"
matching upon consecutives items of a list ? (btw it isn't still not
really clear in my own mind, but it looks like ideas from here are
always clever one, it may help :)

best,


From franz.steinhaeusler at utanet.at  Thu Apr 28 03:57:18 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Thu, 28 Apr 2005 09:57:18 +0200
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<426fb959_1@rain.i-cable.com>
Message-ID: <5o5171pc1c71cdciglchcrg2nokck5f201@4ax.com>

On Thu, 28 Apr 2005 00:10:00 +0800, "monkey" <m at m.com> wrote:

>Is it related to wxpython you mean? or program with GUI in tk (the default
>installed with python) is faster? Would you mind to tell me more...

I have the impression, that the startup time of tkinter is twice as fast
as in wxPython.
But after that, wxPython response times ar as fast as in tkinter.

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From irmen.NOSPAM at xs4all.nl  Sat Apr 23 11:05:18 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 23 Apr 2005 17:05:18 +0200
Subject: Frog 1.4 (web log aka blogging server)
In-Reply-To: <mailman.2332.1114224946.1799.python-list@python.org>
References: <4269535a$0$145$e4fe514c@news.xs4all.nl>
	<mailman.2332.1114224946.1799.python-list@python.org>
Message-ID: <426a642f$0$146$e4fe514c@news.xs4all.nl>

limodou wrote:
> great!
> 
> How about change the bbcode like editor to FCKeditor? I think
> FCKeditor is much better, or make it as an optional editor which the
> user could select it himself.

Isn't that pretty heavyweight for a blog?
I mean; Frog is not a CMS with which you write HTML pages...

Then again, it shouldn't be very hard to switch de default
formatting engine for another one, the code is already
somewhat prepared for this.

I'd say, give it a shot :)   Patches are gladly accepted.

(I'll put this as a nice-to-have on the list)

--Irmen



> 
> 2005/4/23, Irmen de Jong <irmen.NOSPAM at xs4all.nl>:
> 
>>I've released a new version of Frog, a web log
>>aka blogging server written in 100% python.
>>
[...]


From steve at holdenweb.com  Mon Apr 25 20:44:35 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 25 Apr 2005 20:44:35 -0400
Subject: Python or PHP?
In-Reply-To: <pan.2005.04.26.00.01.53.726156@jerf.org>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>	<86br85rvfw.fsf@guru.mired.org>	<Xns9641B33152AA6castleamber@130.133.1.4>	<863bthrmtg.fsf@guru.mired.org>	<Xns9641E05B2BE91castleamber@130.133.1.4>	<86y8b8rgg5.fsf@guru.mired.org>	<Xns9642125692F42castleamber@130.133.1.4>	<86d5skr2l3.fsf@guru.mired.org>	<Xns9642A952FD589castleamber@130.133.1.4>	<86y8b7pydc.fsf@guru.mired.org>	<Xns9642C549BBBEFcastleamber@130.133.1.4>	<86u0lvph0n.fsf@guru.mired.org>	<Xns964392B70C958castleamber@130.133.1.4>	<86mzrmo5j8.fsf@guru.mired.org>	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<pan.2005.04.26.00.01.53.726156@jerf.org>
Message-ID: <d4k2jo$57h$1@sea.gmane.org>

Jeremy Bowers wrote:
> On Mon, 25 Apr 2005 23:26:56 +0000, John Bokma wrote:
> 
> 
>>Mike Meyer wrote:
>>
>>
>>>John Bokma <john at castleamber.com> writes:
> 
> 
> Nobody ever changed their mind as a result of a 20-thread endless
> reply-fest. As usual, the posters aren't about to admit anything, and none
> of the bystanders are reading any more.

Yup.

zzzzzzzzzzzzzz-ly y'r  - steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From vze4rx4y at verizon.net  Mon Apr  4 20:44:28 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Tue, 05 Apr 2005 00:44:28 GMT
Subject: sparse sets of integers?
References: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
Message-ID: <Mbl4e.2686$7b.1113@trndny04>

[Dan Stromberg]
> Does anyone have a python implementation (or python C/C+ extension) that
> would allow me to perform set operations (union, intersection, difference,
> number of elements, &c) over very large collections of integers?
>
> Some of the sets may have over 10**11 (probably less than 10**13
> though) integers in them, but there will tend to be runs of integers being
> included or not included, so there might be 10**5 consecutive integers
> included, then 10**4 that are not included, and then another 10**6 that
> are.

This may help:

    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/230113


Raymond Hettinger




From reinhold-birkenfeld-nospam at wolke7.net  Wed Apr 20 15:33:08 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Wed, 20 Apr 2005 21:33:08 +0200
Subject: What's the difference between these 2 statements?
In-Reply-To: <4266ad9f$0$14218$636a15ce@news.free.fr>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
Message-ID: <3cnp3kF6qj7b9U1@individual.net>

tiissa wrote:
> Reinhold Birkenfeld wrote:
>> ATSkyWalker wrote:
>> 
>>>What's the difference between these 2 statements?
>>>
>>>If you have a String s="12345"
>>>
>>>s[len(s)::-1] = "54321"
>>>
>>>But
>>>
>>>s[len(s):0:-1] = "5432"
>>>
>>>Why? What's the difference? What number then can I use as the end of
>>>the slice if I were to supply all 3 parameters?
>> 
>> 
>> -1.
> 
> -len(s) or less.
> -1 will return an empty string.
> 
> Actually you start from len(s)-1 (len(s) is not an index in s) and you 
> stop when you reach the index specified (or the end). Since -1 is the 
> same index as the starting one (-1~>len(s)-1, -2~>len(s)-2, 
> -len(s)+1~>0), you end up with an empty string.
> 
> Therefore you have to try to reach indices lower (due to the negative 
> step) than the minimum valid index of your list in order to reverse it 
> fully.

Right, sorry.

Well, I guess that's why one can leave out the index...

Reinhold


From ivanlan at pauahtun.org  Tue Apr 26 11:27:57 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 26 Apr 2005 09:27:57 -0600
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
	<j0vr61dgok60f13cdgpamomerj7ickr7fh@4ax.com>
Message-ID: <426E5DFD.9D908099@pauahtun.org>

Hi All--

Richie Hindle wrote:
> 
> Xah is right - I have a copy here of his message of 18th April, saying "i
> have rewrote the Python's re module documentation.".
> 

Which announcement alone I take as evidence sufficient unto itself.  I
shall not be reading the "rewrote" documentation.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From bokr at oz.net  Sun Apr  3 03:14:55 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 03 Apr 2005 07:14:55 GMT
Subject: Finding attributes in a list
References: <1112101524.879186.260630@o13g2000cwo.googlegroups.com>
	<1112116787.160723.219160@l41g2000cwc.googlegroups.com>
	<TtWdnTsfY9roA9TfRVn-vw@comcast.com>
	<4249f2d0.22628407@news.oz.net>
	<mailman.1250.1112503454.1799.python-list@python.org>
Message-ID: <424f8e75.173184706@news.oz.net>

On Sat, 2 Apr 2005 23:44:11 -0500, Marcus Goldfish <magoldfish at gmail.com> wrote:

>> class Player(object):
>>    def __init__(self, **kw): self.__dict__.update(kw)
>>    def __repr__(self): return '<Player %s>'%getattr(self, 'name', '(anonymous)')
>>
>> import operator
>> [p.name for p in sorted(players, key=operator.attrgetter('attacking'), reverse=True)]
>
>Just happened to read this thread and wanted to say this is a neat
>little example-- thank you!  I have a couple of followup questions.
>
>   (1) Is there a performance penalty for using key=operator.attrgetter()?
        I would think sorted would make it as efficient as possible, but possibly.
        I can conceive of low level optimization for key=<some C builtin that can be recognized>
        But timing is best ;-) Also, vs what? There are a number of alternatives.

>   (2) The Player class looks like a nice model for a data table when one
>        wants to sort by arbitrary column.  Would you agree?
         Depends on scale, and what else use you have for a custom object representation. E.g.,
         (using below lists available from interactive session below) a plain dict by names (unique required)
         with (attack, defense) tuples as values is probably pretty efficient and fast.

          >>> dict(zip(names, zip(attack, defense)))
          {'linda': (8, 6), 'bob': (7, 6), 'sam': (5, 8)}

         But if objects are going to be complex and have methods or properties, OO makes it easy.

>   (3) Suppose one wished to construct a player list from a collection of
>        attribute lists, e.g.,
>
>                names = ['bob', 'sam', 'linda']
>                attack = [7, 5, 8]
>                defense = [6, 8, 6]
>                # construct players list here
>
>       Can you recommend an efficient way to construct the player list?
>
I wouldn't worry about efficiency unless you are dealing with a database of
all the worlds teams ;-) (And in that case, you probably want to look into
interfacing with the database your data is already in, to let it do things
for you natively e.g. via SQL).

If you know the "columns" as matching attribute lists as above, zip will associate them
into tuples. Also, I used a keyword argument in the Player __init__ above because I
wanted to copy and paste the dict calls from the prior post, but knowing exact columns,
I'd probably do some thing like:

 >>> class Player(object):
 ...     def __init__(self, name, attack=None, defense=None): # require name
 ...         self.name = name
 ...         self.attack = attack
 ...         self.defense = defense
 ...
 >>> names = ['bob', 'sam', 'linda']
 >>> attack = [7, 5, 8]
 >>> defense = [6, 8, 6]
 >>>

Then the players list is just
 >>> players = [Player(*tup) for tup in zip(names, attack, defense)]
where *tup unpacks a tuple from the output of zip into the arg list of Player's __init__.

And you can extract the names like
 >>> [player.name for player in players]
 ['bob', 'sam', 'linda']

Or whatever you want
 >>> for player in players: print player.name, player.attack, player.defense
 ...
 bob 7 6
 sam 5 8
 linda 8 6

As mentioned, zip makes tuples of corresponding elements of its argument lists:
 >>> zip(names, attack, defense)
 [('bob', 7, 6), ('sam', 5, 8), ('linda', 8, 6)]

If you had huge input lists, you could avoid the terporary tuple list using
 >>> import itertools
 >>> iplayers = list(itertools.starmap(Player, itertools.izip(names, attack, defense)))
 >>> for player in iplayers: print player.name, player.attack, player.defense
 ...
 bob 7 6
 sam 5 8
 linda 8 6

You can look into __slots__ if you want to have objects but need reduced memory footprint.
But don't worry about optimizing 'til you can prove you need it, unless just for fun ;-)

Ok. That's enough relief for me. Got other stuff ...

Regards,
Bengt Richter


From rune.strand at gmail.com  Sun Apr 17 21:20:26 2005
From: rune.strand at gmail.com (runes)
Date: 17 Apr 2005 18:20:26 -0700
Subject: Finding name of running script
References: <1113778866.595981.186480@f14g2000cwb.googlegroups.com>
	<1113783390.440857.302680@l41g2000cwc.googlegroups.com>
Message-ID: <1113787226.002190.265140@g14g2000cwa.googlegroups.com>

Thanks!

That's os.path.basename() I guess. It's better, but still complex.

I have a
_nof_ = argv[0].split(sep)[-1]  in my script template and use it under
the usage() function to tell what the script does, like:

"cf.py counts files in directory or directory structure"

If I change the filename, I want it to be automatically reflected when
running the script. That's the motivation.

I have the feeling that I came a cross some very simple way to extract
the filename, but I can't find my mental note ;-)



From syd.diamond at gmail.com  Tue Apr  5 16:22:08 2005
From: syd.diamond at gmail.com (syd)
Date: 5 Apr 2005 13:22:08 -0700
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
In-Reply-To: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
Message-ID: <1112732528.830194.320710@z14g2000cwz.googlegroups.com>

Thanks for all the help, guys!

The affected computer is at home, but I'll address all these issues
before I post again with my fix.

James: It's on my personal box, and I've got reiserfs.

David:
OS: GNU/Linux 2.4 (Gentoo)
Python 2.3
GNUplot 1.6

I just checked the Gentoo Portage tree and 1.7 is listed "~x86"
(unstable), so unwittingly I had gotten 1.6 when I emerged gnuplot-py.
Definitely, the first thing I'm going to do is upgrade to 1.7.

Before I do, though, I'll try to see if this works:
Gnuplot.GnuplotOpts.prefer_fifo_data = 0
Gnuplot.GnuplotOpts.prefer_inline_data = 1

It sounds like Paul had the same problem.  I'll also try the "binary =
1" before I upgrade.

Fernando, that's a creative solution, I'll try it as well...
while 1:
  if os.path.isfile(your_plot_filename):
    break
  time.sleep(1)

Thanks guys!



From eurleif at ecritters.biz  Fri Apr 15 21:30:14 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 16 Apr 2005 01:30:14 GMT
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <GUZ7e.1862$5I5.97650@newshog.newsread.com>

Brian Sabbey wrote:
> class C(object):
>    x = property():
>       doc = "I'm the 'x' property."
>       def fget(self):
>          return self.__x
>       def fset(self, value):
>          self.__x = value
>       def fdel(self):
>          del self.__x

After seeing this example, I think I'll go on a killing spree if your 
proposal doesn't get used in Python 2.5 or 2.6. Defining properties like 
that would be awesome, only better.


From sm.synonymous at gmail.com  Thu Apr 21 01:30:23 2005
From: sm.synonymous at gmail.com (Synonymous)
Date: 20 Apr 2005 22:30:23 -0700
Subject: Pattern Matching Given # of Characters and no String Input;
	use RegularExpressions?
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
	<42623ba8$0$10322$636a15ce@news.free.fr>
	<ae0b1ff7.0504171712.731fabd3@posting.google.com>
	<aq3661d0q7f204t61f4mghf01fm8v5g9pv@4ax.com>
Message-ID: <ae0b1ff7.0504202130.6ccbd5@posting.google.com>

John Machin <sjmachin at lexicon.net> wrote in message news:<aq3661d0q7f204t61f4mghf01fm8v5g9pv at 4ax.com>...
> On 17 Apr 2005 18:12:19 -0700, sm.synonymous at gmail.com (Synonymous)
> wrote:
> 
> >
> >I will look for a Left$(str) function that looks at the first X
> >characters for python :)).
> >
> 
> Wild goose chase alert! AFAIK there isn't one. Python uses slice
> notation instead of left/mid/right/substr/whatever functions. I do
> suggest that instead of looking for such a beastie, you read this
> section of the Python Tutorial: 3.1.2 Strings. 
> 
> Then, if you think that that was a good use of your time, you might
> like to read the *whole* tutorial :))

Haha it always comes down to RTFM i guess, which is always the best
advice :o).

Thank you for your help, Now that I think about it I guess string is
exactly what I am looking for because even though I am using file
names I am treating them like strings when comparing them.

Byebye :o)

S M


From rho at see.signature.invalid  Fri Apr  1 01:27:45 2005
From: rho at see.signature.invalid (Nigel Rowe)
Date: Fri, 01 Apr 2005 16:27:45 +1000
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
Message-ID: <114pqf31isr8k4d@news.supernews.com>

Roy Smith wrote:

> I've used the standard unittest (pyunit) module on a few projects in the
> past and have always thought it basicly worked fine but was just a little
> too complicated for what it did.
> 
> I'm starting a new project now and I'm thinking of trying py.test
> (http://codespeak.net/py/current/doc/test.html).  It looks pretty cool
> from
> the docs.  Is there anybody out there who has used both packages and can
> give a comparative review?

Have you seen Grig Gheorghiu's 3 part comparison of unittest, and py.test?

http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-1-unittest.html
http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-2-doctest.html
http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-3-pytest-tool.html

-- 
        Nigel Rowe
        A pox upon the spammers that make me write my address like..
                rho (snail) swiftdsl (stop) com (stop) au


From sunnan at handgranat.org  Wed Apr  6 06:53:34 2005
From: sunnan at handgranat.org (Sunnan)
Date: Wed, 06 Apr 2005 10:53:34 GMT
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
In-Reply-To: <du7vf70gzel.fsf@mozart.cc.tut.fi>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net> <1112456559.835048@yasure>
	<424edf02@nntp0.pdx.net> <Qb_3e.134003$dP1.471291@newsc.telia.net>
	<du7vf70gzel.fsf@mozart.cc.tut.fi>
Message-ID: <OcP4e.21481$d5.157914@newsb.telia.net>

Ville Vainio wrote:
> Read up on list comprehensions and generator expressions. You'll see
> the terse side of Python (and genexps look kinda poetic too ;-).
> 

I am familiar with lc:s/genexps, I usually program in scheme which also 
has them (srfi-42).
They're very nice and I use them a lot.


From james at wrong.nu  Fri Apr 15 22:37:26 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Sat, 16 Apr 2005 03:37:26 +0100
Subject: Piping data into script under Win32
In-Reply-To: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
References: <1113617504.067692.311950@o13g2000cwo.googlegroups.com>
Message-ID: <200504160337.36696.james@wrong.nu>

On Saturday 16 April 2005 03:11, runes wrote:
> I trying to figure out a way to make a python script accept data output
> from another process under Windows XP, but I fail miserably. I have a
> vague memory having read this is not possible with Python under
> Windows...
>
> C:\> type countlines.py | python countlines.py
> Counted 3 lines.

Are you definitely doing this and not:

C:\> type countlines.py | countlines.py

That will give you the error you're seeing. The example you posted works for 
me.
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From listspam at flowtheory.net  Fri Apr  8 17:19:34 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Fri, 8 Apr 2005 15:19:34 -0600
Subject: Https Form Page
In-Reply-To: <764176c10504081313501b1e1f@mail.gmail.com>
References: <764176c10504081313501b1e1f@mail.gmail.com>
Message-ID: <87b1fe089f338ada9e53838fd1f7d90e@flowtheory.net>

Try:

import urllib2, urllib
formdata = urllib.urlencode({'a':1,'b':2})
request = urllib2.Request(url)
request.add_data(formdata)
opener = urllib2.build_opener(urllib2.HTTPSHandler())
urllib2.install_opener(opener)
fs = urllib2.urlopen(request)
https_response = fs.read()
https_headers = fs.info().headers
https_mimetype = fs.info().type

-jag

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 8, 2005, at 2:13 PM, Hasan D wrote:

> I'm new on this httplib and urllib. Actually I dont know what should i 
> use.
>
> I want to fill the form in a "https" page , and return the result . I
> write a test code but always gives errors. I cant find any good
> example about this on the net. What should I do about this ?
>
>
> import urlparse,urllib,httplib,string,htmllib,formatter
>
> #port="443"
> target="https://www.abc.com/"
> params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
> http=httplib.HTTP("https://www.abc.com/",443)
>
> data='Name=x&Adress=x'
> headers = {"Content-type":
> "application/x-www-form-urlencoded","Accept": "text/plain"}
>
> print "Sending Data On "+target+"...\n"
> http.putrequest("POST",target+"/xxx.asp?q=7&b=11",params)
>
> response = http.getresponse()
> print response.status, response.reason
>
> http.send(data)
>
> code,msg,headers = http.getreply()
>
> print "HTTP Code : ",str(code)
> print "HTTP Connection : ",msg
> print "HTTP headers : \n",headers,"\n"
>
> HTML=http.getfile().read()
> MyParser=htmllib.HTMLParser(formatter.NullFormatter())
> MyParser.feed(HTML)
> # Print all the anchors from the results page
> print MyParser.anchorlist
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>

From __peter__ at web.de  Fri Apr 15 13:20:17 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 15 Apr 2005 19:20:17 +0200
Subject: How to fix this error in the example in 6.1.4 Files and
	Directories
References: <1113583932.703797.118610@o13g2000cwo.googlegroups.com>
Message-ID: <d3ot48$vbl$03$1@news.t-online.com>

fuzzylollipop wrote:

> print?sum([getsize(join(root,?name))?for?name?in?files]),
> print?sum([getsize(join(root,name))?from?name?in?files]),

Do you see the difference? ... for ... is the correct syntax, ... from ...
is what Python seems to complain about.

Peter





From mage at mage.hu  Tue Apr 26 10:32:55 2005
From: mage at mage.hu (Mage)
Date: Tue, 26 Apr 2005 16:32:55 +0200
Subject: How to start python interactively from python script?
In-Reply-To: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>
References: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>
Message-ID: <426E5117.5060005@mage.hu>

draghuram at gmail.com wrote:

>Hi,
>
>I would like to have a python script which does some computations at
>the beginning and then changes to interactive mode (by displaying the
>prompt). How can I do this?
>  
>
popen()

       Mage


From mwm at mired.org  Sat Apr  9 15:17:45 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 09 Apr 2005 14:17:45 -0500
Subject: checkbook manager -> cross platform printing
References: <_A34e.2207$1r6.248@trnddc02> <6ri4e.3393$3O2.1384@trnddc01>
Message-ID: <86oecnwyhy.fsf@guru.mired.org>

"David Isaac" <aisaac0 at verizon.net> writes:

> "Alan Isaac" <aisaac0 at verizon.net> wrote in message
> news:_A34e.2207$1r6.248 at trnddc02...
>> I'd like to try personal financial management using Python.
>> I just found PyCheckbook, but it does not support check printing.
>> Is there a Python check printing application kicking around?
> OK, I'll assume silence means "no", so new question.

You really should wait more than a day for answers. Lots of people
(me, for instance) read the newsgroup once aq day.

> What is the current be practice for cross platform printing of PostScript
> files from Python?
> Same question for PDF.  (I'm aware of
> URL:http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html.)

I don't think there's a cross-platform solution for these things,
because different platforms handle printing in different manners. Your
URL talks about shellExecute for Windows. On Unix, I expect to be able
to hand ps to lpr and have the right thing happen. pdf may need a
pdf2ps (part of ghostscript) run on it first, or it may not, depending
on the system setup.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tiissa at nonfree.fr  Sun Apr 17 06:34:17 2005
From: tiissa at nonfree.fr (tiissa)
Date: Sun, 17 Apr 2005 12:34:17 +0200
Subject: Pattern Matching Given # of Characters and no String Input; use
 RegularExpressions?
In-Reply-To: <42623565$0$3566$626a14ce@news.free.fr>
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
Message-ID: <42623ba8$0$10322$636a15ce@news.free.fr>

tiissa wrote:
> If you know the number of characters to match can't you just compare 
> slices?
If you don't, you can still do it by hand:

In [7]: def cmp(s1,s2):
   ....:     diff_map=[chr(s1[i]!=s2[i]) for i in range(min(len(s1), 
len(s2)))]
   ....:     diff_index=''.join(diff_map).find(chr(True))
   ....:     if -1==diff_index:
   ....:         return min(len(s1), len(s2))
   ....:     else:
   ....:         return diff_index
   ....:

In [8]: cmp('cccat','cccap')
Out[8]: 4

In [9]: cmp('ccc','cccap')
Out[9]: 3

In [10]: cmp('cccat','dddfa')
Out[10]: 0


From mfranklin1 at gatwick.westerngeco.slb.com  Fri Apr 15 04:54:18 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Fri, 15 Apr 2005 09:54:18 +0100
Subject: Tk Listbox - Selected Item ?
In-Reply-To: <425f722b$0$5849$9a6e19ea@news.newshosting.com>
References: <pan.2005.04.14.12.05.18.839662@optushome.com.au>	<mailman.1892.1113484982.1799.python-list@python.org>
	<425f722b$0$5849$9a6e19ea@news.newshosting.com>
Message-ID: <d3nv99$qf4$1@sea.gmane.org>

Peter Moscatt wrote:
> Martin Franklin wrote:
> 
> 
>>Peter Moscatt wrote:
>>
>>>I am having trouble understanding the methods for the Listbox from Tk.
>>>
>>>If I was to select at item in the list using a mouse click (have already
>>>created the bind event) - what method returns the text of the selected
>>>item ?
>>>
>>>Pete
>>>
>>
>>
>>Pete,
>>
>>pydoc Tkinter.Listbox
>>
>><snip>
>>
>>  |  curselection(self)
>>  |      Return list of indices of currently selected item.
>>  |
>>  |  delete(self, first, last=None)
>>  |      Delete items from FIRST to LAST (not included).
>>  |
>>  |  get(self, first, last=None)
>>  |      Get list of items from FIRST to LAST (not included).
>>
>>So to get the value of the selected item:
>>
>>lb.get(lb.curselection()[0])
>>
>>
>>provided the listbox is in single selection mode or only one item is
>>selected
>>
>>Martin
> 
> 
> Thanks Martin,
> 
> I used the:
>   lb.get(lb.curselection()[0])
> 
> ant this works to a point.  When I select the item in the listbox the system
> generates an error:
> 
> Exception in Tkinter callback
> Traceback (most recent call last):
>   File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1345, in __call__
>     return self.func(*args)
>   File "/home/linux/programming/dxcluster/servers.py", line 37, in sel
>     items = self.listbox.get(self.listbox.curselection()[0])
> IndexError: tuple index out of range
> 
> 
> Then if I select a second time directly after the error message I get my
> desired result.
> 

Pete,

Sounds like you are using the wrong kind of bind event. That is the
first time you select an item the callback for the bind command is
called *before* the selection is made.  Can you post the code you have
showing the bind method and callback?

This code shows three different bind methods, the first produces the
same exception that you got...


from Tkinter import *


root = Tk()
lb = Listbox(root)
lb.insert(0, "one")
lb.insert(0, "two")
lb.insert(0, "three")
lb.pack()

def callback(*event):
     print lb.get(lb.curselection()[0])

## BAD
#~ lb.bind("<1>", callback)

## OK
#~ lb.bind("<ButtonRelease-1>", callback)

## Best
lb.bind("<<ListboxSelect>>", callback)

root.mainloop()


The <<ListboxSelect>> is a virtual event I think quick google would tell
you more and the Tk man pages (online) have a complete explanation...

http://www.tcl.tk/man/tcl8.4/TkCmd/listbox.htm
http://www.tcl.tk/man/tcl8.4/TkCmd/listbox.htm#M60


Cheers,
Martin.



From codecraig at gmail.com  Tue Apr 19 14:53:05 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 11:53:05 -0700
Subject: XML-RPC -- send file
In-Reply-To: <42654e90$0$20628$626a14ce@news.free.fr>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
	<1113930209.259905.112850@o13g2000cwo.googlegroups.com>
	<mailman.2122.1113933410.1799.python-list@python.org>
	<1113933767.439552.169130@g14g2000cwa.googlegroups.com>
	<42654e90$0$20628$626a14ce@news.free.fr>
Message-ID: <1113936785.569089.11210@z14g2000cwz.googlegroups.com>

stefan:  i added, "return 1" to my sendFile method on the server...took
care of the error, thanks.

f. petitjean: i cleaned up my code by closing the file, however, when i
tried your exact code above...i got stuck an infinite loop and my PC
speaker beeped over and over :)

thanks.



From mwm at mired.org  Tue Apr 26 06:13:01 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 05:13:01 -0500
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org>
	<hpivj2-lh1.ln1@lairds.us> <86y8b6o8pw.fsf@guru.mired.org>
	<1114487173.272526.13670@o13g2000cwo.googlegroups.com>
	<V2nbe.73933$xJ7.4988028@phobos.telenet-ops.be>
Message-ID: <86acnln8wi.fsf@guru.mired.org>

Roel Schroeven <rschroev_nospam_ml at fastmail.fm> writes:

> googleboy wrote:
>
>> What this script does is use take the output of vmstat to report idle
>> cpu cycles (or memory stuff, etc.) over a period specified by a
>> parameter,  all the better to be a plugin for a monitoring service.
>> Basically it parses the output of the command,  runs through a whole
>> bunch of regex to discard everything not required and then reports the
>> info.  Everything I had checked out that responded "Linux" to a uname
>> command had identical output for vmstat until FC3.   FC3 seems to use
>> similar output to BSD.   I wrote a simple if-then loop to try to
>> determine which regex function to use, but it obivously isn't working
>> under fc3.
>
> In that case, it seems to be a better idea to check the version of
> vmstat that's on the system. At least, I presume that such differences
> in behaviour can be deduced from the vmstat version string.

Hmm. That doesn't seem to work here:

guru% vmstat --version
vmstat: illegal option -- -
usage: vmstat [-aimsz] [-c count] [-M core [-N system]] [-w wait]
              [-n devs] [disks]
guru% what $(which vmstat)
/usr/bin/vmstat:
	 Copyright (c) 1980, 1986, 1991, 1993

The man page doesn't turn up any information on how to extract a
version for vmstat, either.

vmstat isn't a very unixish program. It's output clearly wasn't
designed to be used as input to other programs.

         <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From skip at pobox.com  Sat Apr  2 00:03:24 2005
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 1 Apr 2005 23:03:24 -0600
Subject: Simple thread-safe counter?
In-Reply-To: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
Message-ID: <16974.10140.527737.100810@montanaro.dyndns.org>


    Paul> I'd like to have a function (or other callable object) that
    Paul> returns 0, 1, 2, etc. on repeated calls.
    ...
    Paul> There should never be any possibility of any number getting
    Paul> returned twice, or getting skipped over, even if f is being called
    Paul> from multiple threads.

How about (untested):

    import Queue

    counter = Queue.Queue()
    counter.put(0)
    def f():
        i = counter.get()
        counter.put(i+1)
        return i

Obviously, if you want multiple counters for some reason a little
information hiding with a class would help (also untested):

    import Queue

    class Counter:
        def __init__(self, start=0):
            self.counter = Queue.Queue()
            self.counter.put(start)

        def __call__(self):
            i = self.counter.get()
            self.counter.put(i+1)
            return i

Skip


From eric_brunel at despammed.com  Tue Apr 19 10:00:42 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Tue, 19 Apr 2005 16:00:42 +0200
Subject: New to Tkinter...
References: <d431e1$9ee$1@malgudi.oar.net>
Message-ID: <opsphfvgo7rqur0o@eb.pragmadev>

On Tue, 19 Apr 2005 09:35:03 -0400, Peter G Carswell <pete at osc.edu> wrote:

> Good Morning.
>
> I am new to Tkinter. I have been testing the installation of Tkinter
> through the python web site. The first two test steps give no errors,
> 'import _tkinter' and 'import Tkinter'. However, the third step,
> 'Tkinter._test', gives the error:
>     <function _test at 0xb7ec8df4>

This is not an error. It's just the value of the _test function in the Tkinter module. You don't give the URL where you found the installation/test instructions, but you probably want:

Tkinter._test()

which *calls* the function. Tkinter._test just returns its value (functions are first class objects in Python...)

HTH
-- 
python -c 'print "".join([chr(154 - ord(c)) for c in "U(17zX(%,5.z^5(17l8(%,5.Z*(93-965$l7+-"])'


From ajikoe at gmail.com  Thu Apr 21 03:40:37 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 21 Apr 2005 00:40:37 -0700
Subject: regarding main function
In-Reply-To: <mailman.2206.1114067150.1799.python-list@python.org>
References: <mailman.2206.1114067150.1799.python-list@python.org>
Message-ID: <1114069237.189995.68330@g14g2000cwa.googlegroups.com>

if you run in the same file there is no difference.

Block under "__main__" will be executed if you run that file only but
if you import that file from another file, then if you don't put your
code inside "__main__" your code it will be executed (this is not what
you want).

Example:

You have 1 file called mydll.py
inside mydll you have :

def func1():
   print 'Helo world'

# you want to test your func1()
func1() # when you run you get 'Helo world'

then you have another file called MyCode.py which you like to call
func1(), inside this file you have this code:
import mydll
mydll.func1()

# you hope you get 'Helo World'
# In fact you get :
# 'Helo World'
# 'Helo World'
--------------
This happened because when you import mydll python will execute all
code in mydll including the one you put it for test.

So to overcome this problem if you want to test your code put inside
block __main__, next time you import your mydll it won't execute any
codes inside __main__

Hope this help.

Pujo



From steve at holdenweb.com  Sat Apr 30 23:11:48 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 30 Apr 2005 23:11:48 -0400
Subject: Best way to parse file into db-type layout?
In-Reply-To: <391871t746ng3pgjlm8dv801qjd5cg9qem@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>	<d4vn0s$i3b$1@gemini.csx.cam.ac.uk>	<fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>	<mailman.58.1114867406.14961.python-list@python.org>
	<391871t746ng3pgjlm8dv801qjd5cg9qem@4ax.com>
Message-ID: <d51h25$2i2$1@sea.gmane.org>

John Machin wrote:
> On Sat, 30 Apr 2005 09:23:16 -0400, Steve Holden <steve at holdenweb.com>
> wrote:
> 
> 
>>John Machin wrote:
>>[...]
>>
>>>I wouldn't use fileinput for a "commercial data processing" exercise,
>>>because it's slow, and (if it involved using the Python csv module) it
>>>opens the files in text mode, and because in such exercises I don't
>>>often need to process multiple files as though they were one file.
>>>
>>
>>If the process runs once a month, and take ten minutes to process the 
>>required data, isn't that fast enough.
> 
> 
> Depends: (1) criticality: could it have been made to run in 5 minutes,
> avoiding the accountant missing the deadline to EFT the taxes to the
> government (or, worse, missing the last train home)?
> 
Get real: if that's the the timeline you don't need new software, you 
need a new accountant.

> (2) "Many a mickle makes a muckle": the total of all run times could
> be such that overnight processing doesn't complete before the day
> shift turns up ...
> 
Again, get real and stop nitpicking.
> 
>>It's unwise to act as though 
>>"slow" is an absolute term.
> 
> 
>>>When I am interested in multiple files -- more likely a script that
>>>scans source files -- even though I wouldn't care about the speed nor
>>>the binary mode, I usually do something like:
>>>
>>>for pattern in args: # args from an optparse parser
>>>    for filename in glob.glob(pattern):
>>>        for line in open(filename):
>>>
>>>There is also an "on principle" element to it as well -- with
>>>fileinput one has to use the awkish methods like filelineno() and
>>>nextfile(); strikes me as a tricksy and inverted way of doing things.
>>>
>>
>>But if it happens to be convenient for the task at hand why deny the OP 
>>the use of a tool that can solve a problem? We shouldn't be so purist 
>>that we create extra (and unnecessary) work :-), and principles should 
>>be tempered with pragmatism in the real world.
> 
> 
> If the job at hand is simulating awk's file reading habits, yes then
> fileinput is convenient. However if the job at hand involves anything
> like real-world commercial data processing requirements then fileinput
> is NOT convenient.
> 
Yet again, get real. If someone tells me that fileinput  meets their 
requirements who am I (not to mention who are *you*) to say they should 
invest extra effort in solving their problem some other way?

> Example 1: Requirement is, for each input file, to display name of
> file, number of records, and some data totals.
> 
> Example 2: Requirement is, if end of file occurs when not expected
> (including, but not restricted to, the case of zero records) display
> an error message and terminate abnormally.
> 
Possibly these examples would have some force if they weren't simply 
invented.

> I'd like to see some code for example 1 that used fileinput (on a list
> of filenames) and didn't involve "extra (and unnecessary) work"
> compared to the "for filename in alist / f = open(filename) / for line
> in f" way of doing it.
> 
> If fileinput didn't exist, what do you think the reaction would be if
> you raised a PEP to include it in the core?
> 
Why should such speculation interest me?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From bokr at oz.net  Fri Apr  8 18:51:57 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 08 Apr 2005 22:51:57 GMT
Subject: curious problem with large numbers
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>
	<mailman.1517.1112938969.1799.python-list@python.org>
	<4256a676@nntp0.pdx.net> <4256b80b.34130777@news.oz.net>
	<4256b774$1@nntp0.pdx.net>
Message-ID: <425709d7.55070387@news.oz.net>

On Fri, 08 Apr 2005 10:18:05 -0700, Scott David Daniels <Scott.Daniels at Acm.Org> wrote:

>Bengt Richter wrote:
>>>Aha! Same version (2.3.4):
>>>
>>>Idle:
>>>    >>> 1e10000
>>>    1.0
>>>    >>> import struct; struct.pack('d', 1e10000)
>>>    '\x00\x00\x00\x00\x00\x00\xf0?'
>>>(which is actually 1.0)
>>>
>>>python via command line (readline support):
>>>    >>> 1e10000
>>>    1.#INF
>>>    >>> import struct; struct.pack('d', 1e10000)
>>>    '\x00\x00\x00\x00\x00\x00\xf0\x7f'
>>>
>>>Note the difference in the final byte.  Same results (command
>>>line vs. Idle) for 2.4.1.
>>>
>
>> Good aha, but ISTM one of them is more missing than different ;-)
>> (I.e., returned packed string is length 7 vs 8)
>In the first one, the final byte is '?' (I made the same mistake
>myself when I first read it).
>
D'oh. Must always switch from driving glasses to computer glasses when reading NG ;-/

>Also note:
>
>     float('1e10000') is 1.#INF both in Idle and from the command line.
>
>I suspect an Idle bug.
>
I'll trust you this time ;-)

Regards,
Bengt Richter


From jfine at pytex.org  Thu Apr 14 01:41:26 2005
From: jfine at pytex.org (Jonathan Fine)
Date: Thu, 14 Apr 2005 06:41:26 +0100
Subject: Simple Python + Tk text editor
References: <425D6641.5050906@pytex.org> <7xfyxuqxe3.fsf@ruckus.brouhaha.com>
Message-ID: <425E0286.2020402@pytex.org>

Paul Rubin wrote:
> Jonathan Fine <jfine at pytex.org> writes:
> 
>>I'm looking for a simple Python + Tk text editor.
>>
>>I want it as a building block/starting point.
> 
> 
> Something wrong with IDLE?


Thanks for this suggestion.

For some reason, I did not think of IDLE as an editor.
Must have been a blind spot.

Though not simple, IDLE is a good starting point for me.

And for my project (integration of Python and TeX) there
is most unlikely to be a better one.

However, learning IDLE details might be quite a detour
from my immediate goals.


Some code follows, in case anyone else is interested.


IDLE is not yet a package, it seems.  But the idea is there.
===
jfine at apricot:/usr/lib/idle-python2.1$ cat __init__.py
# Dummy file to make this a potential package.
===

/usr/bin/idle hacked to produce an EditorWindow.
===
#! /usr/bin/python

import os
import sys
sys.path[:0] = ['/usr/lib/idle-python2.1']
import IdleConf

idle_dir = os.path.dirname(IdleConf.__file__)
IdleConf.load(idle_dir)

# new code
import Tkinter
import EditorWindow

root = Tkinter.Tk()

EditorWindow.EditorWindow(root=root)
EditorWindow.mainloop()
sys.exit()
# end of new code

# defer importing Pyshell until IdleConf is loaded
import PyShell
PyShell.main()
===

-- 
Jonathan
http://qatex.souceforge.org



From bogus@does.not.exist.com  Fri Apr 22 16:25:02 2005
From: bogus@does.not.exist.com ()
Date: Fri, 22 Apr 2005 20:25:02 -0000
Subject: (no subject)
Message-ID: <mailman.34.1572216645.3356.python-list@python.org>

#! rnews 2261
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: PDF Printing support from Python
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References: <1114191192.978923.268390 at f14g2000cwb.googlegroups.com> <116iihncpcr5057 at corp.supernews.com> <1114198703.935948.286720 at o13g2000cwo.googlegroups.com>
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"dcrespo" <dcrespo at gmail.com> writes:

> Hi Grant Edwards...
> 
> Your solution requires a previous installation of Acrobat. Internally,
> the OS is sending the pdf file to the Acrobat PDF Driver and then it is
> sent to the printer. So you have to have Acrobat installed. Don't you?
> I want to avoid it installing a module that could do it (maybe I'm
> dreaming:( ). If there's no solution, then I will be very sad :-S
> 
> This is what exactly I need to do:
> Generate an invoice of 216cm width and 93cm height (1/3 of the height
> of a letter paper size), and print it respecting these dimensions. So,
> when I print this page on a dot matrix printer, it stops at those 93cm
> of height for continuous printing.
> 
> What I tried:
> I created a pdf file manually with these dimensions, and right-click on
> the pdf file, and selected "print". It just work under Windows XP with
> Acrobat Reader 7.0, but I want to do it from a Win98 as well.
> Unfortunately, there's no Acrobat version under Win98 (the maximun is
> 5.1) that supports this kind of printing (what I had seen until now).
> It prints, but the all paper at letter size :(
> 
> Any help? Any other tools? Any one like Cristal Report but for Python?
> I heard that wxPython supports some kind of reporting, but I don't know
> it. Anyone knows?
> 
> Daniel
> 


When you say "OS", are you talking MS Windows by any chance?  On *NIX
(e.g., CUPS+ghostview+foomatic), PDF printing is not via Adobe code.

You could also consider pdf2ps, pdftops, and XPDF.


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From donmcdaniel2005 at yahoo.com  Fri Apr 29 23:19:04 2005
From: donmcdaniel2005 at yahoo.com (Donald L McDaniel)
Date: Fri, 29 Apr 2005 20:19:04 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
	<LXsce.2698$zu.1067@newssvr13.news.prodigy.com>
Message-ID: <OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>

AKA wrote:
> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
> news:%23ATbpqMTFHA.3980 at TK2MSFTNGP12.phx.gbl...
>> MC05 wrote:
>>> "sheltech" <quasara at earthlink.net> wrote in message
>>> news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
>>>>
>>>> "MC05" <smokerdude66 at myway.com> wrote in message
>>>> news:3dc8hjF6s5i2uU1 at individual.net...
>>>>>
>>>>> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>>>> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>>>>>>
>>>>>> 4) I doubt seriously whether God plays a guitar, since guitars
>>>>>> are made by men, for men.  His Son could theoretically play a
>>>>>> guitar. Perhaps He does. Perhaps He doesn't.  Only the Father
>>>>>> and His Holy Angels know.
>>>>>
>>>>> So then Lucifer was a wicked bass player whose sex and drugs and
>>>>> rock n roll alientated the rest of the band and was fired?
>>>>>
>>>>>
>>>>>
>>>>
>>>> "Fired" ....  good one
>>>
>>> Heh.  Can't take credit for an accident.  Your eye is better than
>>> mine. :)
>>
>> The Devil has been fired...by God Himself.  Read the Book of
>> Revelation in the New Testament:  Satan's end is clearly outlined by
>> the Angel Jesus sent to St. John.  This end is very clear:  he will
>> be cast alive into the Lake which burns with fire and brimstone,
>> where he will be tormented day and night forever.
>>
>> Not only Satan and his angels will be cast into the Lake, but all
>> those who follow him and his servants.  I assure you, Satan won't be
>> ruling anyone in the Fire.  He will be in just as much torment as
>> his followers. Neither will he have any sort of job.
>>
>> I strongly advise you to stop making fun of things you have no
>> understanding of.  Your eternal destiny depends on the way you treat
>> others.
>>
>> --
>> Donald L McDaniel
>> Please reply to the original thread,
>> so that the thread may be kept intact.
>> ==============================
>>
> Just imagine if you actually had a coherent thought.

My Bible tells me that the Truth sounds like foolishness to a perishing man.
Are you perishing?  God threw out a life-raft for you.  Jesus is more than 
willing to rescue a drowning man.  Go to the nearest church(Roman Catholic, 
Eastern Orthodox), and ask how you can be saved from your sin.

-- 
Donald L McDaniel
Please reply to the original thread,
so that the thread may be kept intact.
============================== 




From ville at spammers.com  Fri Apr 29 06:53:11 2005
From: ville at spammers.com (Ville Vainio)
Date: 29 Apr 2005 13:53:11 +0300
Subject: large dictionary creation takes a LOT of time.
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
Message-ID: <du7hdhpc0rs.fsf@amadeus.cc.tut.fi>

>>>>> "Kent" == Kent Johnson <kent37 at tds.net> writes:

    Kent> if frequency.has_key(word):
    Kent> frequency[word] += 1
    Kent> else:
    Kent> frequency[word] = 1

This is a good place to use 'get' method of dict:

frequency[word] = frequency.get(word,0) + 1

-- 
Ville Vainio   http://tinyurl.com/2prnb


From vze4rx4y at verizon.net  Thu Apr 14 23:59:34 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 15 Apr 2005 03:59:34 GMT
Subject: New-style classes, iter and PySequence_Check
References: <d3m795$cuq$1@epityr.hut.fi> <_u-dnQ8UApqBQ8PfRVn-hw@comcast.com>
	<425ef142.399754396@news.oz.net>
Message-ID: <G_G7e.6716$Fm5.4610@trndny09>

[Bengt Richter]
> I'm not sure, but I think it may be expedient optimization practicality
beating purity.

It is more a matter of coping with the limitations of the legacy API where want
to wrap a sequence iterator around __getitem__  in sequences but not in
mappings.



> <snipped code experiments>
> I haven't walked the relevant iter() code.
> That would be too easy ;-)

The actual code for Object/abstract.c's PyObject_GetIter() is somewhat more
straight-forward and less mysterious than those experiments suggest.



Raymond




From finite.automaton at gmail.com  Thu Apr 14 18:26:50 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 14 Apr 2005 15:26:50 -0700
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
Message-ID: <1113517610.449151.242500@o13g2000cwo.googlegroups.com>

That's pretty good, but I have an algorithm that compresses data into
zero bits.

def compress(data):
  pass

To decompress, you simply generate a random string of random length
using a random number generator based on quantum states, with the
expectation that you happen to be in one of the possible universes for
which this string turns out to be the data you compressed in the first
place.

Now, according to Leibniz,  God (who alone exists by necessity)
initially conceived of all possible worlds, and He chose this world out
of all others to actualize.  Because God is benevolent, he chose the
fullest world with the least evil, meaning that we do indeed exist in
the Best of All Possible Worlds.  In the Best of All Possible worlds,
that random string you just generated would be your uncompressed data,
right?  In fact, it might even be better than the original data.  (a
"gainy" algorithm?)


[file under "Faith Algorithms"]



From greg at cosc.canterbury.ac.nz  Fri Apr  1 01:05:11 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 01 Apr 2005 18:05:11 +1200
Subject: Grouping code by indentation - feature or ******?
In-Reply-To: <qXB2e.264074$r4.16023840@news-reader.eresmas.com>
References: <IDwEr6.K2u@bath.ac.uk>
	<qH91e.259681$r4.15769879@news-reader.eresmas.com>
	<pan.2005.03.27.07.00.34.307937@uiuc.edu>
	<ktA1e.260110$r4.15818805@news-reader.eresmas.com>
	<1112162883.943233.37980@o13g2000cwo.googlegroups.com>
	<qXB2e.264074$r4.16023840@news-reader.eresmas.com>
Message-ID: <3b46l3F6g23prU1@individual.net>

Javier Bezos wrote:
> 2) You have an ending point (e) and a
>    length: lst[e-t+1:e+1].

If you use the "slice indices represent points between
the elements" mental model, then you don't have an
ending point here, you have one less than the ending
point -- hence it's not surprising that you need to
add 1.

> 3) You have a starting point and an ending
>    point: lst[s:e+1].

Again, you don't really have an ending point.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From possibilitybox at gmail.com  Fri Apr 29 02:51:08 2005
From: possibilitybox at gmail.com (possibilitybox)
Date: 28 Apr 2005 23:51:08 -0700
Subject: large dictionary creation takes a LOT of time.
Message-ID: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>

this code here:


def wordcount(lines):
    for i in range(len(lines)/8):
        words = lines[i].split(" ")
        if not locals().has_key("frequency"):
            frequency = {}
        for word in words:
            if frequency.has_key(word):
                frequency[word] += 1
            else:
                frequency[word] = 1
    return frequency
wordcount(lines)

is taking over six minutes to run on a two megabyte text file.  i
realize that's a big text file, a really big one (it's actually the
full text of don quixote.).  i'm trying to figure out how.  is there a
better way for me to do a frequency count of all the words in the text?
 it seems to me like this should scale linearly, but perhaps it isn't?
i don't know much about algorithmic complexity.  if someone could give
a breakdown of this functions complexity as well i'd be much obliged.

lines is expected to be a list of lines as provided by file.readline()



From dcrespo at gmail.com  Wed Apr 27 22:30:28 2005
From: dcrespo at gmail.com (dcrespo)
Date: 27 Apr 2005 19:30:28 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <1114636952.944082.233220@f14g2000cwb.googlegroups.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<mailman.2580.1114613011.1799.python-list@python.org>
	<1114616192.342452.178720@o13g2000cwo.googlegroups.com>
	<mailman.2584.1114617214.1799.python-list@python.org>
	<1114626660.172481.303090@z14g2000cwz.googlegroups.com>
	<1114636952.944082.233220@f14g2000cwb.googlegroups.com>
Message-ID: <1114655428.613559.159920@l41g2000cwc.googlegroups.com>

Ok, I get the point. So, when a dynamic component comes up, It can be
handled importing from an XRC file?
I have to develop a complete MDI app, so I'm realizing that I will get
ride of hand-coding it.

Daniel



From mrovner at propel.com  Sat Apr 30 20:10:02 2005
From: mrovner at propel.com (Mike Rovner)
Date: Sat, 30 Apr 2005 17:10:02 -0700
Subject: How to track down all required shared libraries?
In-Reply-To: <1114896365.287665.126130@o13g2000cwo.googlegroups.com>
References: <1114896365.287665.126130@o13g2000cwo.googlegroups.com>
Message-ID: <d516do$ahk$1@sea.gmane.org>

sdhyok wrote:
> Recently, I installed many shared libraries to run a program written in
> Python.
> Now, I am in the situation to run the same program but on several
> different machines with the same Linux OS. To avoid the reinstallation,
> I like to pack up all shared libraries into a directory. Is there a
> good way to track down all shared libraries required to run a Python
> program?
> 
> Daehyok Shin
> 

To get executable requirements use ldd.
When python can't load a lib at run-time usually ImportError is raised.
As with other errors you can never know which libs will be dynamically 
required.

Mike



From RonGrossi382842 at yahoo.com  Sun Apr 24 19:22:21 2005
From: RonGrossi382842 at yahoo.com (RonGrossi382842 at yahoo.com)
Date: 24 Apr 2005 16:22:21 -0700
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_your_?=
	=?iso-8859-1?q?location=2E_I_want_to_ask_you_the_most_important_qu?=
	=?iso-8859-1?q?estion_of_your_life=2E_Your_joy_or_sorrow_for_all_e?=
	=?iso-8859-1?q?ternity_depends_upon_your_answer=2E_The_question_is?=
	=?iso-8859-1?q?=3A_Are_you_saved=3F_It_is_not_a_question_of_how_go?=
	=?iso-8859-1?q?od_you_are=2C_nor_if_you_are_a_church_member=2C_but?=
	=?iso-8859-1?q?_are_you_saved=3F_Are_you_sure_you_will_go_to_Heave?=
	=?iso-8859-1?q?n_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST=B7149?=
Message-ID: <1114384941.623433.251470@o13g2000cwo.googlegroups.com>


This is the most important question of your life.

The question is: Are you saved?

It is not a question of how good you are,
nor if you are a church member, but are you saved?

Are you sure you will go to Heaven when you die?

The reason some people don't know for sure if they
are going to Heaven when they die is because they
just don't know.

The good news is that you can know for sure that
you are going to Heaven.

The Holy Bible describes Heaven as a beautiful
place with no death, sorrow, sickness or pain.

God tells us in the Holy Bible how simple it is
to be saved so that we can live forever with Him
in Heaven.

"For if you confess with your mouth Jesus is Lord
and believe in your heart that God raised Him from
the dead, you WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven to earth
in the person of Jesus Christ to shed His blood
and die on a cross to pay our sin debt in full.

Jesus Christ was born in Israel supernaturally to
a virgin Jewish woman named Mary and lived a sinless
life for thirty-three years.

At the age of thirty-three Jesus was scourged and
had a crown of thorns pressed onto His head then
Jesus was crucified.

Three days after Jesus died on a cross and was
placed in a grave Jesus rose from the dead as Jesus
said would happen before Jesus died.

If someone tells you that they are going to die and
then three days later come back to life and it
actually happens then this person must be the
real deal.

Jesus Christ is the only person that ever lived a
perfect sinless life.

This is why Jesus is able to cover our sins(misdeeds)
with His own blood because Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we have
redemption through His blood, the forgiveness of
sins..." (Ephesians 1:7)

If you would like God to forgive you of your past,
present and future sins just ask Jesus Christ to be
your Lord and Saviour.

It doesn't matter how old you are or how many bad
things that you have done in your life including
lying and stealing all the way up to murder.

Just pray the prayer below with your mouth and mean
it from your heart and God will hear you and save you.

Dear Jesus Christ, I want to be saved so that I can
have a home in Heaven with You when I die. I agree
with You that I am a sinner. I believe that You love
me and want to save me. I believe that You bled and
died on the cross to pay the penalty for my sins and
that You rose from the dead. Please forgive my sins
and come into my heart and be my Lord and Saviour.
Thanks Lord Jesus Christ for forgiving me and saving
me through Your merciful grace. Amen.

Welcome to the family of God if you just allowed God
to save you.

Now you are a real Christian and you can know for
sure that you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid sin(wrongdoing),
but if you do sin the Holy Bible says, "My dear
children, I write this to you so that you will not
sin. But if anybody does sin, we have one who speaks
to the Father in our defense Jesus Christ,
the Righteous One."

Those of you that have not yet decided to place your
trust in the Lord Jesus Christ may never get another
chance to do so because you do not know when you
will die.

Jesus said, "I am the way, the truth and the life:
no one can come to the Father(God)(in Heaven), but
by me." (John 14:6)

This means that if you die without trusting in Jesus
Christ as your Lord and Saviour you will be forever
separated from the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of eternal
torment, suffering, pain and agony for all those who
have rejected Jesus Christ.

The good news is that you can avoid Hell by allowing
Jesus Christ to save you today. Only then will you
have true peace in your life knowing that no matter
what happens you are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi


*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!


..???`???...???`???.?_?_?.?`???`???....???`???.


Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.biblegateway.com


..???`???...???`???.?_?_?.?`???`???....???`???.



From steven.bethard at gmail.com  Wed Apr 13 00:32:28 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 12 Apr 2005 22:32:28 -0600
Subject: sort of a beginner question about globals
In-Reply-To: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
Message-ID: <3aOdnX8D67t5PcHfRVn-qQ@comcast.com>

fred.dixon wrote:
> i have read the book and searched the group too
> ----------------------------------------------
> im not gettin it.
> i want to read a global (OPTIONS) from file1 from a class method
> (func1) in file2
> i want to understand how this works.
> 
> ----------------------------------------------
> #file1.py
> import file2
> import sys
> 
> OPTION = sys.argv[1:]
> pass
> a=global2.class1()
> a.func1()
> 
> 
> #file2.py
> import __main__
> pass
> class class1:
> .    def func1(self):
> .        pass
> -------------------------------------------

----- file1.py -----
import file2

a = file2.class1()
a.func1()
--------------------

----- file2.py -----
class class1(object):
     def func1(self):
         pass
--------------------

I don't see what you want OPTION for, so I've removed it.  If you can 
explain your intentions better, maybe I can help more.

STeVe


From cam.ac.uk at mh391.invalid  Wed Apr 20 09:00:25 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 20 Apr 2005 14:00:25 +0100
Subject: goto statement
In-Reply-To: <mailman.2158.1113989043.1799.python-list@python.org>
References: <mailman.2158.1113989043.1799.python-list@python.org>
Message-ID: <d45jpa$ce2$1@gemini.csx.cam.ac.uk>

praba kar wrote:

>    In Python what is equivalent to goto statement

http://groups-beta.google.com/group/comp.lang.python/msg/98264a0daa007c46
-- 
Michael Hoffman


From anthony.hornby at cdu.edu.au  Fri Apr  8 21:10:25 2005
From: anthony.hornby at cdu.edu.au (anthony hornby)
Date: Sat, 09 Apr 2005 10:40:25 +0930
Subject: Text & Unicode processing references on the web.
Message-ID: <1113009026.6784.18.camel@bacchus.hornby.homedns.org>

Hi,
I am starting my honours degree project and part of it is going to be
manipulating ASCII encoded XML files from a legacy database and
converting them to Unicode and doing text processing stuff on the data.

I am new to python ( total n00b ) but am keen to use it as the rest of
the software my application has to extend is already written in python,
plus I've always wanted to learn more about it - so here's my chance :-)

I've written stuff in Java and Perl so I expect I'll pick up the basics
without too much trouble.

Can anyone point out some good "Python & Unicode" and "Python & Text
processing" resources on the net to get me started? Any good book
recommendations?

Thanks a lot for your help.

-- 
Mr Anthony Hornby RHCE BIT ALIATEC
Library Systems & Technology Coordinator
Charles Darwin University | CRICOS 300K
anthony.hornby at cdu.edu.au | office +61 8 89 466011



From max at alcyone.com  Wed Apr  6 23:27:54 2005
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 06 Apr 2005 20:27:54 -0700
Subject: Overwrite just one line? Am I a n00b or is this impossible?
 Both? :D
In-Reply-To: <1112844191.105938.158340@o13g2000cwo.googlegroups.com>
References: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>
	<PtKdnVpGjLlOwsnfRVn-gg@speakeasy.net>
	<1112844191.105938.158340@o13g2000cwo.googlegroups.com>
Message-ID: <cYydnTk6vuMnNcnfRVn-pQ@speakeasy.net>

Matt at revera wrote:

> Ok the key was "r+b" as opposed to "a+b" but why is that?  R is for
> read, correct?  And b for binary.  Adding the plus gives me some form
> of write capability?

Read binary is "rb," but read-write binary is "r+b."  The "+" means that 
you can write, too.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   It's a man's world, and you men can have it.
   -- Katherine Anne Porter


From damien.wyart at free.fr  Mon Apr  4 13:44:31 2005
From: damien.wyart at free.fr (Damien Wyart)
Date: Mon, 04 Apr 2005 19:44:31 +0200
Subject: DIY Spam Filter in Python
References: <9d5509fa.0504040039.526c93b6@posting.google.com>
Message-ID: <42517cff$0$15069$636a15ce@news.free.fr>

* pballard at ozemail.com.au (Peter Ballard) in comp.lang.python:
> Source code, and a bit of documentation, is at:
> http://members.ozemail.com.au/~pballard/diyspamfilter.html

BTW, 2 of the 3 files are links, so missing from the tar archive...

-- 
DW


From martin at v.loewis.de  Sun Apr  3 01:37:02 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 03 Apr 2005 08:37:02 +0200
Subject: Docorator Disected
In-Reply-To: <0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
Message-ID: <424F8F0E.2010701@v.loewis.de>

Ron_Adam wrote:
>>Ah, so you did not know functions are objects just like numbers,
>>strings or dictionaries. I think you may have been influenced by other
>>languages where there is a concept of static declaration of functions.
> 
> 
> No, I did not know that you could pass multiple sets of arguments to
> nested defined functions in that manner.  

Please read the statements carefully, and try to understand the mental
model behind them. He did not say that you can pass around multiple
sets of arguments. He said that functions (not function calls, but
the functions themselves) are objects just like numbers. There is
a way of "truly" understanding this notion, and I would encourage
you to try doing so.

Regards,
Martin


From quasara at earthlink.net  Tue Apr 12 06:59:56 2005
From: quasara at earthlink.net (sheltech)
Date: Tue, 12 Apr 2005 10:59:56 GMT
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60_=28newsgroup?=
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
	<1113074212.618866.24620@f14g2000cwb.googlegroups.com>
Message-ID: <MSN6e.4359$go4.130@newsread2.news.atl.earthlink.net>


"Soy Bomb" <whocaresrmb at yahoo.com> wrote in message
news:1113074212.618866.24620 at f14g2000cwb.googlegroups.com...
> "The Holy Bible descibes Hell as a place of
> eternal torment, suffering, pain and agony
> for all those who have rejected Jesus Christ. "
>
> Sounds like the USA 2005.
>

and what's worse is that it smells like teen spirit .
a generation of kids growing up being taught  superstition instead of
science,
in this day and age ? . sanctioned by otherwise presumably intelligent,
educated people holding public office ?. unfreaking believable, in this
day and age . what  *^&$*$ planet did I wake up on ?. I'm all for  us
exploring
our spiritual nature , but  everything in it's place , and  some things are
just
so obviously metaphorical , allegorical, or just plain storytelling , that
it's
stupid to take them literally .  f#kin freaks  (^:#  ....






From ajikoe at gmail.com  Tue Apr 26 06:40:16 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 26 Apr 2005 03:40:16 -0700
Subject: delete will assure file is deleted?
In-Reply-To: <8664y9n8hy.fsf@guru.mired.org>
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
Message-ID: <1114512016.930540.164920@g14g2000cwa.googlegroups.com>

Hello Mike,
I have to know this topic otherwise my program has to check whether the
file / files are already deleted and this is a little bit messy.

Pujo



From RonGrossi382904 at yahoo.com  Wed Apr 27 19:33:58 2005
From: RonGrossi382904 at yahoo.com (RonGrossi382904 at yahoo.com)
Date: 27 Apr 2005 16:33:58 -0700
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_your_?=
	=?iso-8859-1?q?location=2E_I_want_to_ask_you_the_most_important_qu?=
	=?iso-8859-1?q?estion_of_your_life=2E_Your_joy_or_sorrow_for_all_e?=
	=?iso-8859-1?q?ternity_depends_upon_your_answer=2E_The_question_is?=
	=?iso-8859-1?q?=3A_Are_you_saved=3F_It_is_not_a_question_of_how_go?=
	=?iso-8859-1?q?od_you_are=2C_nor_if_you_are_a_church_member=2C_but?=
	=?iso-8859-1?q?_are_you_saved=3F_Are_you_sure_you_will_go_to_Heave?=
	=?iso-8859-1?q?n_when_you_die=3F_GOOGLE=B7NEWSGROUP=B7POST=B7151?=
Message-ID: <1114640110.171596.223260@g14g2000cwa.googlegroups.com>


This is the most important question of your life.

The question is: Are you saved?

It is not a question of how good you are,
nor if you are a church member, but are you saved?

Are you sure you will go to Heaven when you die?

The reason some people don't know for sure if they
are going to Heaven when they die is because they
just don't know.

The good news is that you can know for sure that
you are going to Heaven.

The Holy Bible describes Heaven as a beautiful
place with no death, sorrow, sickness or pain.

God tells us in the Holy Bible how simple it is
to be saved so that we can live forever with Him
in Heaven.

"For if you confess with your mouth Jesus is Lord
and believe in your heart that God raised Him from
the dead, you WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven to earth
in the person of Jesus Christ to shed His blood
and die on a cross to pay our sin debt in full.

Jesus Christ was born in Israel supernaturally to
a virgin Jewish woman named Mary and lived a sinless
life for thirty-three years.

At the age of thirty-three Jesus was scourged and
had a crown of thorns pressed onto His head then
Jesus was crucified.

Three days after Jesus died on a cross and was
placed in a grave Jesus rose from the dead as Jesus
said would happen before Jesus died.

If someone tells you that they are going to die and
then three days later come back to life and it
actually happens then this person must be the
real deal.

Jesus Christ is the only person that ever lived a
perfect sinless life.

This is why Jesus is able to cover our sins(misdeeds)
with His own blood because Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we have
redemption through His blood, the forgiveness of
sins..." (Ephesians 1:7)

If you would like God to forgive you of your past,
present and future sins just ask Jesus Christ to be
your Lord and Saviour.

It doesn't matter how old you are or how many bad
things that you have done in your life including
lying and stealing all the way up to murder.

Just pray the prayer below with your mouth and mean
it from your heart and God will hear you and save you.

Dear Jesus Christ, I want to be saved so that I can
have a home in Heaven with You when I die. I agree
with You that I am a sinner. I believe that You love
me and want to save me. I believe that You bled and
died on the cross to pay the penalty for my sins and
that You rose from the dead. Please forgive my sins
and come into my heart and be my Lord and Saviour.
Thanks Lord Jesus Christ for forgiving me and saving
me through Your merciful grace. Amen.

Welcome to the family of God if you just allowed God
to save you.

Now you are a real Christian and you can know for
sure that you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid sin(wrongdoing),
but if you do sin the Holy Bible says, "My dear
children, I write this to you so that you will not
sin. But if anybody does sin, we have one who speaks
to the Father in our defense Jesus Christ,
the Righteous One."

Those of you that have not yet decided to place your
trust in the Lord Jesus Christ may never get another
chance to do so because you do not know when you
will die.

Jesus said, "I am the way, the truth and the life:
no one can come to the Father(God)(in Heaven), but
by me." (John 14:6)

This means that if you die without trusting in Jesus
Christ as your Lord and Saviour you will die in your
sins and be forever separated from the love of God in
a place called Hell.

The Holy Bible descibes Hell as a place of eternal
torment, suffering, pain and agony for all those who
have rejected Jesus Christ.

The good news is that you can avoid Hell by allowing
Jesus Christ to save you today. Only then will you
have true peace in your life knowing that no matter
what happens you are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi


*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!






..???`???...???`???.?..???`???...???`???.


Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.biblegateway.com


..???`???...???`???.?..???`???...???`???.






*This message may get deleted so you may want to print a copy.
*Just press the [Ctrl][P] keys on your keyboard to print this page.



From epimethee at gmail.com  Mon Apr 25 15:19:13 2005
From: epimethee at gmail.com (?pim?th?e)
Date: 25 Apr 2005 12:19:13 -0700
Subject: Wanted: Freedom Force game mod community looking for Python
	developers
Message-ID: <76a563bb.0504251119.5ca68560@posting.google.com>

Hi,

Sorry for the slightly off-topic post.

Freedom Force and its recent follow-up, Freedom Force vs the Third
Reich, are 3D RPG/TRS games using Python for higher-level programming,
such as mission scripting.

As such, the game has gotten quite a few people to discover Python (a
prodigious language, in my uninformed opinion). Clever hacks have been
developped, allowing things ranging from astral projection to
animating mailboxes to on-the-fly level transformation. However, while
there are some programmers in our little community, I believe there's
no one with extensive Python experience outside the game.

As the second game is just out, this seems like a good jumping point
for anybody interested in joining. If you've got free time and are
interested in participating, your expertise and inventiveness could
certainly be useful and you could have some great fun doing
development on a silly project. ;)

Scripters are usually hanging on the scring and mods forums of 
http://freedomreborn.net/invision/

Thanks.


(Disclaimer: I'm not affiliated with either the game developper or
publisher, nor with the Freedom Reborn board admins; this is strictly
a personal initiative.)


From Corinne.Grosstephan at urs.u-strasbg.fr  Tue Apr 26 08:29:48 2005
From: Corinne.Grosstephan at urs.u-strasbg.fr (Corinne Grosstephan)
Date: Tue, 26 Apr 2005 14:29:48 +0200
Subject: Mail Delivery (failure telephonie.freebox@freetelecom.com)
Message-ID: <5.0.2.1.2.20050426142826.00aa2330@urs.u-strasbg.fr>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20050426/242466a1/attachment.html>

From bokr at oz.net  Fri Apr  1 02:03:55 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 01 Apr 2005 07:03:55 GMT
Subject: Little Q: how to print a variable's name, not its value?
References: <1112076404.328077.247630@f14g2000cwb.googlegroups.com>
	<1112079694.786110.73040@o13g2000cwo.googlegroups.com>
	<5voi419517lc3a5pmbevs8j5hjbjmtplff@4ax.com>
	<mailman.1017.1112113429.1799.python-list@python.org>
	<ao7j411od71ilqqsjnudlcmrdutl5rmf0s@4ax.com>
	<mailman.1033.1112126329.1799.python-list@python.org>
	<05dj41p9od4qv8jto77m6t695lapet1080@4ax.com>
	<Xns9629624CA1C97duncanrcpcouk@127.0.0.1>
	<1112248566.277611.96040@g14g2000cwa.googlegroups.com>
	<424ba7e2.134518517@news.oz.net>
	<1112331282.118840.178060@l41g2000cwc.googlegroups.com>
Message-ID: <424cef42.1357321@news.oz.net>

On 31 Mar 2005 20:54:42 -0800, "stewart.midwinter at gmail.com" <stewart.midwinter at gmail.com> wrote:

>Bengt wrote:
>"The way you use those words makes me wonder: "assign _it_"?? Which
>'it'? "
>
>- it's probably evident to any close observer that my understanding of
>objects is superficial, no doubt a reflection of the fact that I
>started programming on punch cards a very long time ago.  I use objects
>every day, but I clearly need to do some further study in order to
>develop my knowledge. 
>
>Thanks for your explanations.!
>
You're welcome. But I started programming with flexowriter punched
paper tape before I got to punch cards, so either the prognosis is hopeful or
maybe you should take what I write with a grain or two of salt. Probably both ;-)

Regards,
Bengt Richter


From rkern at ucsd.edu  Tue Apr 12 15:41:34 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 12 Apr 2005 12:41:34 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3h83i$6f0$1@sea.gmane.org>

Antoon Pardon wrote:

> What licence can I use? Somewhere they say you can combine python
> code with GPL code. Does that mean that the resulting code has
> to have both the GPL license as the PSF license, as both seem
> to want that derived work uses the same license.

No, the PSF does not want that. It does not say so anywhere in the 
license text. Yes, you can GPL the derived work. The licenses are 
compatible.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From fredrik at pythonware.com  Fri Apr 22 09:47:08 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 15:47:08 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com><EFj8e.809$E57.495@fe51.usenetserver.com><pan.2005.04.20.10.08.25.97524@gmail.com><f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA><pan.2005.04.22.11.48.13.138980@gmail.com>
	<pan.2005.04.22.13.22.14.591804@gmail.com>
Message-ID: <d4av05$nq8$1@sea.gmane.org>

Willem Ligtenberg wrote:

> As I'm trying to write the code using cElementTree.
> I stumble across one problem. Sometimes there are multiple values to
> retrieve from one record for the same element. Like this:
> <Prot-ref_name_E>ATP-binding cassette, subfamily G, member 1</Prot-ref_name_E>
> <Prot-ref_name_E>ATP-binding cassette 8</Prot-ref_name_E>
> 
> How do you get not only the first, but the rest as well, so that I can
> store it in a list.

findall returns a list of matching elements.  if "elem" is the paretnt element,
this gives you a list of the text inside all Prot-ref_name_E child elements:

    [e.text for e in elem.findall("Prot-ref_name_E")]

(you have read the elementtree documentation, I hope?)

</F>



From ivoras at _-_fer.hr  Sun Apr 24 05:31:38 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Sun, 24 Apr 2005 11:31:38 +0200
Subject: Unicode problems, yet again
In-Reply-To: <171m61pido84fckea94h8231j8n077qt8k@4ax.com>
References: <d4eruk$gns$1@bagan.srce.hr>
	<171m61pido84fckea94h8231j8n077qt8k@4ax.com>
Message-ID: <d4fp1v$3n5$1@bagan.srce.hr>

John Machin wrote:

>>(Does anyone else feel that python's unicode handling is, well... 
>>suboptimal at least?)
> 
> 
> Your posting gives no evidence for such a conclusion.

Sorry, that was just steam venting from my ears - I often get bitten by 
the "ordinal not in range(128)" error. :)


From pdemb at gazeta.pl  Wed Apr 20 06:06:38 2005
From: pdemb at gazeta.pl (Peter Dembinski)
Date: Wed, 20 Apr 2005 12:06:38 +0200
Subject: Refactoring in Python.
References: <8764yiog3y.fsf@hector.domek>
	<1113945572.931011.149970@z14g2000cwz.googlegroups.com>
Message-ID: <8764yhoj81.fsf@hector.domek>

QuotesViewer at gmail.com writes:

> Investigate the CVS histories of the few 1000s python projects
> available at www.sourceforge.net

I don't work with these guys :>

-- 
http://www.pdemb.prv.pl 


From axel at straschil.com  Sat Apr  9 11:58:08 2005
From: axel at straschil.com (Axel Straschil)
Date: 09 Apr 2005 15:58:08 GMT
Subject: Multiple inheritance: Interface problem workaround,
	please comment this
References: <slrnd5am6f.7ed.axel@m2.sine> <ybCdnTBdnr30w8jfRVn-pQ@comcast.com>
	<slrnd5c9qk.9rm.axel@m2.sine>
	<1112963912.909325.186760@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd5fusg.h7p.axel@m2.sine>

Hello!

> from decorate import decorate # see today thread on decorators for this

Gives me an ImportError: No module named decorate. I've got to donwload
that? (python 2.4)

Thanks,
AXEL.
-- 
"Aber naja, ich bin eher der Forentyp." Wolfibolfi's outing in 
http://www.informatik-forum.at/showpost.php?p=206342&postcount=10


From cdkrug at worldnet.att.net  Mon Apr 25 21:10:18 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Tue, 26 Apr 2005 01:10:18 GMT
Subject: Pythonic way to do static local variables?
Message-ID: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>

I've a function that needs to maintain an ordered sequence between
calls.

In C or C++, I'd declare the pointer (or collection object) static at
the function scope.

What's the Pythonic way to do this?

Is there a better solution than putting the sequence at module scope?

Thanks.





From ville at spammers.com  Wed Apr  6 07:43:43 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 14:43:43 +0300
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
	Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<du7zmwcgzh5.fsf@mozart.cc.tut.fi>
	<mDP4e.21483$d5.157888@newsb.telia.net>
Message-ID: <du7ekdof7v4.fsf@amadeus.cc.tut.fi>

>>>>> "Sunnan" == Sunnan  <sunnan at handgranat.org> writes:

    Sunnan> Ville Vainio wrote:

    Sunnan> Also, Guido recently urged people to explicitly write
    Sunnan> recursions rather than to use reduce - which I thought was
    Sunnan> completely in line with what I've seen as python's goals:
    Sunnan> readability/understandability as more important than
    Sunnan> terseness/non-boringness.

The problem w/ reduce is that it's not intuitive. You'll have to stop
to think what the code w/ reduce does - effectively converting it to a
normal loop (not recursion!) in your head. It's a net loss when you
compare it to just reading an explicit loop as written in code.

    Sunnan> Yesterday, I read some marketing prop describing a
    Sunnan> proprietary IDE (don't remember what language) as
    Sunnan> "exciting", and I went "Ugh, no thanks! Give me calm
    Sunnan> computing." And then I thought - wait: I just ranted about
    Sunnan> boringness on comp.lang.python. Can't boring and calm
    Sunnan> sometimes mean the same thing?

Not for me at least. 'Boring' implies a certain sense of frustration,
not getting anywhere and generally feeling like you are wasting your
time. Human attention is a limited resource, and being bored leads to
loss of attention.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From mrmaple at gmail.com  Fri Apr 15 13:19:52 2005
From: mrmaple at gmail.com (James Carroll)
Date: Fri, 15 Apr 2005 13:19:52 -0400
Subject: py2exe - create one EXE
In-Reply-To: <1113584585.082256.246110@z14g2000cwz.googlegroups.com>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<mailman.1977.1113579964.1799.python-list@python.org>
	<1113580317.027071.183640@z14g2000cwz.googlegroups.com>
	<1113582492.351604.257570@z14g2000cwz.googlegroups.com>
	<1113584585.082256.246110@z14g2000cwz.googlegroups.com>
Message-ID: <b273c74105041510196bff2c9e@mail.gmail.com>

I like that you can automatically invoke NSIS and create an installer,
but I thought the question was how can all of the libraries be in a
single runnable program executable (not a program that installs, but
the program that you wrote.)

I don't think you can do this, because (unless you have your own
version of python that statically links with all of the module's
native code that you need) you would have to have some code that loads
DLLs that are packed in your executable at the moment that the import
happens for that module.

Please correct me if I'm wrong, I'd love to minimize the files that
have to be in the same directory as my executable (or nearby, or in a
common lib dir.)

(sorry you got this twice Craig.)

-Jim


From quantumcheesedog at gmail.com  Wed Apr  6 19:56:54 2005
From: quantumcheesedog at gmail.com (python newbie)
Date: Wed, 06 Apr 2005 23:56:54 GMT
Subject: Harvestman install not working
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
	<1112811970.231676.122830@g14g2000cwa.googlegroups.com>
Message-ID: <aH_4e.19543$zl.11044@newssvr13.news.prodigy.com>

Thanks Anand, (both for Harvestman and for the reply.)
By the way, I did try that, so that the command is:

c:\python23\python.exe install.py py2exe -O2 --packages=encodings

And this time the dist folder was created, but there were only these files 
in there:

library.zip
python23.dll
unicodedata.pyd
w9xpopen.exe
zlib.pyd
_sre.pyd

I'll keep trying though.


"Anand" <abpillai at gmail.com> wrote in message 
news:1112811970.231676.122830 at g14g2000cwa.googlegroups.com...
> Hi
>
>    Latest version of py2exe does not support the option
> --force-imports anymore I think. You can edit the .bat file to remove
> that option. It should work.
>
> -Anand
> 




From philippe at philippecmartin.com  Fri Apr 15 09:29:23 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Fri, 15 Apr 2005 13:29:23 GMT
Subject: Using python from a browser/security hole
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
	<MPG.1cca20626fa9aeca98968a@news-server>
Message-ID: <TkP7e.2472$VA3.2138@newssvr30.news.prodigy.com>

Neil,

Would Jpython let me do that ?
Would java let me call an external Python script - which in turn would
access my device ?

Thanks

Philippe



Neil Hodgson wrote:

> Philippe:
> 
>> Since I need to access a local/client device from the page and
>> that I wish to be cross-platform; does that mean Java is my only
>> way out ?
> 
>    Java is designed to be safe and not allow access to client devices.
> There is a mechanism where you can attempt to ask for permission from
> Java but it looked complex to me and I doubt many browsers will
> cooperate. They have often locked security down to prevent this sort of
> access.
> 
>    Neil



From jeremit0 at gmail.com  Fri Apr  8 22:48:22 2005
From: jeremit0 at gmail.com (jeremit0)
Date: Fri, 08 Apr 2005 22:48:22 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <dJCdnTddJ4h-rsrfRVn-rA@comcast.com>
References: <d36hnj$6h6$1@sea.gmane.org>	<78f6595afdb48aabb9c72dfe549a543e@upf.edu>	<d36mds$l3q$1@sea.gmane.org>	<d36n3h$n0s$1@sea.gmane.org>	<mailman.1575.1112994068.1799.python-list@python.org>
	<dJCdnTddJ4h-rsrfRVn-rA@comcast.com>
Message-ID: <d37fl9$mia$1@sea.gmane.org>

Steven Bethard wrote:
> jeremit0 wrote:
> 
>> Steve Holden wrote:
>>
>>> If you want line numbers,. of course, then you can use
>>>
>>>   for linenum, line in enumerate(myfile.readlines()):
>>>       ...
>>>
>>> Remember that true to Python's philosophy numbering will start at zero.
>>>
>> Is this any better than:
>>
>>     lines = myfile.readlines()
>>     for linenum in xrange(len(lines)):
>>         # Do stuff with lines[linenum] ...
> 
> 
> Well, if you use lines[linenum] often in that code, it'll be more 
> efficient to use enumerate (or bind lines[linenum] to a name, which is 
> basically what enumerate is doing for you).  Given the file test.py:
> 
> --------------------------------------------------
> def elines(lines):
>     for linenum, line in enumerate(lines):
>         x = linenum
>         y = line
>         z = line
> 
> def xlines(lines):
>     for linenum in xrange(len(lines)):
>         x = linenum
>         y = lines[linenum]
>         z = lines[linenum]
> 
> --------------------------------------------------
> 
> Here's what I get with timeit:
> 
> [D:\Steve]$ python -m timeit -s"lines = range(10000); import test" 
> "test.elines(lines)"
> 100 loops, best of 3: 2.85 msec per loop
> 
> [D:\Steve]$ python -m timeit -s"lines = range(10000); import test" 
> "test.xlines(lines)"
> 100 loops, best of 3: 3.18 msec per loop
> 
> The other thing worth noting is that enumerate will work with any 
> iterable, while your xrange technique won't.  Try:
>     for linenum, line in enumerate(myfile):
>         ...
> and
>     for linenum in xrange(len(myfile)):
>         line = myfile[linenum]
>         ...
> and see what kind of cool errors you get with the xrange solution. :)
> 
> STeVe

Wow that is significant evidence.  Thanks for doing that.

This is the first time I have posted to this list.  I really like it for 
two reasons.  1) There are lots of people who are willing to help out 
and 2) there are so many ideas now I can pick which one I like best.  I 
think I am leaning towards using enumerate.

Thanks,
Jeremy



From steve at holdenweb.com  Sun Apr 10 20:41:28 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 10 Apr 2005 20:41:28 -0400
Subject: NYZPUG: Does it still exist?
Message-ID: <4259C7B8.5050304@holdenweb.com>

Following the NYZPUG link at www.python.org gives a Server Application 
Error (this for a very simple link: http://www.nyzpug.org/).

Does anyone know if it's still active?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From deetsNOSPAM at web.de  Sun Apr 24 11:32:19 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 24 Apr 2005 17:32:19 +0200
Subject: Question on metaclasses
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
	<d4gajc$oi8$05$2@news.t-online.com>
	<3d1ovcF6ni178U2@individual.net>
Message-ID: <d4ge64$7pa$02$1@news.t-online.com>

Reinhold Birkenfeld wrote:

> Diez B. Roggisch wrote:
>>> class Foo(type):
>>>     def __new__(cls, name, bases, dict):
>>> 
>>>         for k,v in [(k, v) for k,v in dict.items() if callable(v)]:
>>>             cls.wrap(k,v,cls.get_directives(v), dict)
>>> 
>>>         return super(Foo, self).__new__(self, name, bases, dict)
>> 
>> There is a confusion of self and cls above - rename self with cls.
> 
> And remove the first argument to __new__.

Ehm, no, I don't think so. The code was copied and pasted from a working
metaclass (at least I hope so...), and in the original code a underscore
was used for the first argument. I've been following that bad habit for a
while but recently started to be more following to the established
conventions. So I rewrote that code on the fly. 

This is the full metaclass:

class TransactionAware(type):
    TAS_REX = re.compile("tas::([^, ]+(, *[^, ]+)*)")


    WRAPPERS = {
        "create" : w_create,
        "active" : w_active,
        "bind" : w_bind,
        "sync" : w_sync,
        "autocommit" : w_autocommit,
        }
    def __new__(_, name, bases, dict):

        for k,v in [(k, v) for k,v in dict.items() if callable(v)]:
            _.wrap(k,v,_.get_directives(v), dict)

        return super(TransactionAware, _).__new__(_, name, bases, dict)

    def wrap(_, name, fun, ds, dict, level=0):
        if ds:
            d, rest = ds[0], ds[1:]
            key = "_taw_%s_%i" % (name, level)
            try:
                w_fun = _.WRAPPERS[d](key)
                dict[key] = fun
                _.wrap(name, w_fun, rest, dict, level+1)
            except KeyError, e:
                print "No transaction aware property named %s" % d
                raise e
        else:

            dict[name] = fun

    wrap = classmethod(wrap)

    def get_directives(_, v):
        try:
            doc = v.__doc__
            res = []
            if doc:
                for l in doc.split("\n"):
                    m = _.TAS_REX.match(l.strip())
                    if m:
                        res += [s.strip() for s in m.group(1 ).split(",")]
            res.reverse()
            return res
        except KeyError:
            return []
    get_directives = classmethod(get_directives)



-- 
Regards,

Diez B. Roggisch


From reinhold-birkenfeld-nospam at wolke7.net  Wed Apr 20 07:42:23 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Wed, 20 Apr 2005 13:42:23 +0200
Subject: goto statement
In-Reply-To: <Xns963E3180496D3castleamber@130.133.1.4>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
Message-ID: <3cmtgvF6q13cvU1@individual.net>

John Bokma wrote:
> Mage wrote:
> 
>> praba kar wrote:
>> 
>>>Dear All,
>>>
>>>   In Python what is equivalent to goto statement
>>>
>>>  
>>>
>> You shouldn't use goto in high-level languages.
> 
> Nonsense

Thank you!

Above all your claim is well justified. These brilliant arguments
you have put forth really explain in a magnificent way why goto is a
sane addition to any HLL.

Reinhold


From steve at holdenweb.com  Fri Apr  1 02:06:07 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 01 Apr 2005 02:06:07 -0500
Subject: System bell
In-Reply-To: <20050331235011.GD1786@ActiveState.com>
References: <BE723DD5.63FD%baza@themauvezone.fsnet.co.uk>
	<20050331235011.GD1786@ActiveState.com>
Message-ID: <d2irq5$qu8$1@sea.gmane.org>

Trent Mick wrote:
> [Baza wrote]
> 
>>Am I right in thinking that >>>print "\a" should sound the system, 'bell'?
> 
> 
> It works on the shell on Windows for me (WinXP).
> 
> Trent
> 
Interesting. From a Cygwin bash shell I got an elegant little dingish 
sort of a beep (my volume control was set kind of low). I then ran the 
same code in a Windows shell and nearly deafened myself. It appears that 
the volume control doesn't affect the Windows XP commans shell beep - 
even muting the Windows audio output doesn't stop it (though it does 
stop the Cygwin beep). This could cause heart attacks!

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From gsakkis at rutgers.edu  Tue Apr 26 14:35:10 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 26 Apr 2005 11:35:10 -0700
Subject: Komodo syntax checking for python2.4
Message-ID: <1114540510.452834.64330@f14g2000cwb.googlegroups.com>

I downloaded the latest Komodo (3.1) and configured it for python 2.4
so that it doesn't show decorators and genexps as syntax errors, but
background syntax checking doesn't seem to work at all for python 2.4.
Even for correct files, it shows a "Syntax checking error: Error
checking syntax: retval = 128, stderr=" alert. For python 2.3 it works
fine (modulo the new 2.4 syntax of course). Both 2.3 and 2.4 are built
from source on Cygwin, not ActiveState's binaries, so it might have to
do with this, but I'm unwilling to install yet another python
distribution. Does anyone have the same problem with background syntax
checking on 2.4 ? Thanks,

George



From radam2 at tampabay.rr.com  Wed Apr  6 00:47:30 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Wed, 06 Apr 2005 04:47:30 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<mailman.1412.1112744591.1799.python-list@python.org>
	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>
	<3bh752F6gf4gcU1@individual.net>
Message-ID: <3mp651t9oopr9velectfpv0kfko7eq3836@4ax.com>

On Wed, 06 Apr 2005 16:33:24 +1200, Greg Ewing
<greg at cosc.canterbury.ac.nz> wrote:

>Ron_Adam wrote:
>> I would have preferred the @ symbol to be used as an inline assert
>> introducer.  Which would have allowed us to put debug code anywhere we
>> need.  Such as   @print total @.
>
>Don't lose heart, there are still two unused characters
>left, $ and ?.
>
>? might even be more mnemonic for this purpose, as
>
>     ?print "foo =", foo
>
>has a nice hint of "WT?%$%$ is going on at this point?"
>to it.

LOL, yes, it does.  :-)




From nemesis at nowhere.invalid  Mon Apr 25 04:55:01 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Mon, 25 Apr 2005 08:55:01 GMT
Subject: filename used by shelve
References: <20050424180725.3658.6265.XPN@orion.homeinvalid>
	<mailman.2416.1114368346.1799.python-list@python.org>
Message-ID: <20050425071614.1855.14993.XPN@orion.homeinvalid>

Mentre io pensavo ad una intro simpatica "Fredrik Lundh" scriveva:

>> So the real filename may be different from the argument passed to
>> "open". I have this problem, I want to delete (in some circustances) the
>> file created by shelve.open, how can I know which is the name of this
>> file (or files) ?
> if you put the shelve in a subdirectory, and nuke the entire directory when
> done, you don't have to know the names.
>
>     dbfile = "mydatabase"
>     if not os.path.isdir(dbfile):
>         os.makedirs(dbfile)
>     db = shelve.open(os.path.join(dbfile, "data"), ...)
>     shutil.rmtree(dbfile)

Hmm, this is a good idea. Thanks.

Anyway I think that shelve should provide a method which returns the
files used by the backend database, and the argument "filename" can
confuse users, it should be named "dbname".

-- 
Are crop circles the work of a cereal killer?
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From radam2 at tampabay.rr.com  Thu Apr 21 04:03:34 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Thu, 21 Apr 2005 08:03:34 GMT
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <q7J9e.8283$716.5185@tornado.tampabay.rr.com>

seberino at spawar.navy.mil wrote:
> Many people I know ask why Python does slicing the way it does.....
> 
> Can anyone /please/ give me a good defense/justification???
> 
> I'm referring to why mystring[:4] gives me
> elements 0, 1, 2 and 3 but *NOT* mystring[4] (5th element).
> 
> Many people don't like idea that 5th element is not invited.
> 
> (BTW, yes I'm aware of the explanation where slicing
> is shown to involve slices _between_ elements.  This
> doesn't explain why this is *best* way to do it.)
> 
> Chris
> 

Hi Chris,

What I've found is foreword slicing with positive stepping is very 
convenient for a lot of things. :-)

But when you start trying to use reverse steps, it can get tricky.

There are actually 4 different ways to slice and dice. So we have a 
pretty good choice. So the trick is to match the slice method to what 
you need, and also use the correct index's for that method.


Where s = 'abcd'
With s[i,j]

Foreword slices index, forward steps
     a,  b,  c,  d
i=  0,  1,  2,  3
j=  1,  2,  3,  4

s[0,4] = 'abcd'
s[1,3] = 'bc'

Foreword slice index (-steps)
     a,  b,  c,  d
i=  0,  1,  2,  3
j= -5, -4, -3, -2

s[3,-5] = 'dcba'
s[2,-4] = 'cb'

Reverse slice index (+steps)
     a,  b,  c,  d
i= -4, -3, -2, -1
j=  1,  2,  3,  4

s[-4,4] = 'abcd'
s[-3,3] = 'bc'

Reverse slice index (-steps)
     a,  b,  c,  d
i= -4, -3, -2, -1
j= -5, -4, -3, -2

s[-1,-5] = 'dcba'
s[-2,-4] = 'cb'


(Maybe this could be made a little more symetrical for Python 3000?)

Cheers,
Ron_Adam


From bokr at oz.net  Sun Apr 17 04:18:10 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 08:18:10 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<cf052f0d.0504162206.129ccdbd@posting.google.com>
Message-ID: <42621673.155792998@news.oz.net>

On 16 Apr 2005 23:06:10 -0700, oren at REMOVETHIS1.hishome.net (Oren Tirosh) wrote:

>Take a look at Nick Coglan's "with" proposal:
>
>http://groups.google.co.uk/groups?selm=mailman.403.1105274631.22381.python-list%40python.org
>
>It addresses many of the same issues (e.g. easy definition of
>properties). It is more general, though: while your proposal only
>applies to keyword arguments in a function call this one can be used
>to name any part of a complex expression and define it in a suite.
>
>I think that a good hybrid solution would be to combine the "with"
>block with optional use of the ellipsis to mean "all names defined in
>the with block".
>
>See also the thread resulting from Andrey Tatarinov's original
>proposal (using the keyword "where"):
>
>http://groups.google.co.uk/groups?selm=3480qqF46jprlU1%40individual.net
>
Apologies for lack of attibution, Andrey. And I'm not sure I used your "where" properly just recently.
I added it to some other stuff in haste, without actually remembering exactly where it came from,
believe it or not, even though I got heavily into it in that thread. Somewhat disturbing memory lapse ;-/
I need some sleep ;-/

Regards,
Bengt Richter


From frank at chagford.com  Fri Apr 29 07:11:50 2005
From: frank at chagford.com (Frank Millman)
Date: 29 Apr 2005 04:11:50 -0700
Subject: Best way to create temporary file?
Message-ID: <246a4e07.0504290311.7d692401@posting.google.com>

Hi all

I need to generate potentially large reports from a database, and I
want to offer the option of print preview before actually printing
(using wxPython). I figure that the best way to achieve this is to
write the report to a temporary file, or more likely to a temporary
directory with a separate file for each page. I can use that for
previewing and for printing, and then delete the file/directory.

There seems to be a few ways to achieve this, and I am not sure of the
best way.

1. I can call tempfile.TemporaryFile() for each file required.

2. I can call tempfile.mkdtemp() to create a temporary directory, and
create each file manually.

3. I can call os.tmpfile() for each file required.

After creating the files, I need to re-read them, either one at a time
in sequence (if printing), or any one at random (if previewing a
particular page). This makes me lean towards method 2.

With this method, I create the files manually, so I can name them
according to their page numbers, which makes it easy to open and close
them as required. The other two methods return open file objects, so
it seems that I cannot close them, as there would be no means of
accessing their contents subsequently. Therefore I would have to
maintain a list of open file objects, use indexing to retrieve a
particular page, and then perform seek(0) before I could read it. A
slight downside of method 2 is that I have to delete the files and the
directory manually when I have finished.

I have two additional questions regarding method 3.

Firstly, I am not sure how it works. The docs say that the file has no
directory entries associated with it, and it will be automatically
deleted when there are no file descriptors for the file. What does
this mean? Does it create a physical file, or is it stored in memory?
If the latter, could I run into memory problems if I create a report
with hundreds of pages?

Secondly, I can create the file using FC3 (Python 2.4), but if I try
on Windows 2000 (Python 2.4) I get the message 'OSError: Permission
denied', even though I am a member of the Administrators group.

Any advice on the best approach for this will be much appreciated.

Frank Millman


From sabbey at u.washington.edu  Sat Apr 16 20:21:06 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 17:21:06 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <AoZ7e.1103$Cz3.120328@monger.newsread.com>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<AoZ7e.1103$Cz3.120328@monger.newsread.com>
Message-ID: <Pine.A41.4.61b.0504161407470.132108@dante73.u.washington.edu>

Leif K-Brooks wrote:
> Brian Sabbey wrote:
>> Thunk statements contain a new keyword, 'do', as in the example below. The 
>> body of the thunk is the suite in the 'do' statement; it gets passed to the 
>> function appearing next to 'do'. The thunk gets inserted as the first 
>> argument to the function, reminiscent of the way 'self' is inserted as the 
>> first argument to methods.
>
> It would probably make more sense to pass the thunk as the last argument, not 
> as the first. That would make it easier to create functions with optional 
> thunks, as in:
>
> def print_nums(start, end, thunk=None):
>    for num in xrange(start, end+1):
>        if thunk is not None:
>            num = thunk(num)
>        print num
>
> print_nums(1, 3) # prints 1, 2, 3
>
> do num print_nums(1, 3): # prints 2, 4, 6
>    continue num * 2

That seems like a good idea to me.

I suppose it also makes sense to have the thunk last because it appears 
after all the other arguments in the function call.

>> Because thunks blend into their environment, a thunk cannot be used after 
>> its surrounding 'do' statement has finished
>
> Why? Ordinary functions don't have that restriction:
>
>>>> def foo():
> ...     x = 1
> ...     def bar():
> ...         return x
> ...     return bar
> ...
>>>> foo()()
> 1
>

Thunks, as I implemented them, don't create a closure.  I believe that 
creating a closure will require a performance penalty.  Since one use of 
thunks is in loops, it seems that their performance may often be 
important.

I believe that saving the thunk and calling it a later time is a somewhat 
hackish way to use thunks.  Explicitly defining a function (perhaps with a 
suite-based keyword :) ) seems to me to be a more readable way to go.

But, yes, it is an arbitrary restriction.  If it turns out that 
performance isn't really affected by creating a closure, or that 
performance doesn't matter as much as I think it does, then this 
restriction could be lifted.

-Brian


From ckwiguno at gmail.com  Tue Apr 19 11:36:43 2005
From: ckwiguno at gmail.com (Clara)
Date: 19 Apr 2005 08:36:43 -0700
Subject: The value of the entry widget doesn't get updated
Message-ID: <ea0a4a1a.0504190736.1490276b@posting.google.com>

Hi, can somebody help me,..I have an assignment due next week but now
I'm stuck with this problem....
I tried to get values from entry widget using the
widgetcontrolvariable.get(),..but it seems that it won't work....
I can't print the value I input in the entry widget...However when I
first set the value to something I can get the value just fine...
This is my code
Help please...

msg='*~*Please Login to use the system*~*'
class LoginMenu(Frame):
	
	def createWidgets(self, msg):
		import tkFont
		self.x = StringVar()
		self.y = StringVar()	
		self.x.set("Type here") 
		self.messageLabel= Label(self, text=msg, pady=15,
font=tkFont.Font(weight='bold' ,size=10))
		self.messageLabel.grid(row=0, columnspan=6)
		self.nameLabel= Label(self, text='UserName  :', padx=12,
justify=LEFT)
		self.nameLabel.grid(row=1, column=0, ipadx=9, ipady=5)
		self.nameEntry= Entry(self,justify=LEFT, textvariable=self.x)
		self.nameEntry.grid(row=1, column=3, columnspan=2)
		self.nameEntry.update_idletasks()
		self.passLabel= Label(self, text='Password   :', padx=12,
justify=LEFT)
		self.passLabel.grid(row=2, column=0,ipadx=9, ipady=5)
		self.passEntry= Entry(self,justify=LEFT, show='*',
textvariable=self.y)
		self.passEntry.grid(row=2, column=3, columnspan=2)
		self.passEntry.update_idletasks()
		self.loginButton = Button(self, text='Login', command =
VerifyProcessor(self.x.get(), self.y.get()) )
		self.loginButton.grid(row=4, column=3, ipadx=15, ipady=3, pady=20)
		self.quitButton = Button(self, text='Exit', command = self.quit) 
		self.quitButton.grid(row=4, column=4, ipadx=20, ipady=3, pady=20,
padx=10)

	def __init__(self, msg, master=None):
		Frame.__init__(self, master)
		self.grid(column=4, row=4)
		self.createWidgets(msg)

class VerifyProcessor:

	def __init__(self, thename, thepass):
		self.username = thename
		self.password = thepass

	def __call__(self):
		print self.username
		print self.password


app = LoginMenu(msg)
app.master.title("Login Menu")
app.master.maxsize(280,200)
app.mainloop()


From jerf at jerf.org  Fri Apr  1 13:47:06 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 13:47:06 -0500
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
Message-ID: <pan.2005.04.01.18.47.05.964216@jerf.org>

On Fri, 01 Apr 2005 18:30:56 +0000, Ron_Adam wrote:
> I'm trying to figure out how to test function arguments by adding a
> decorator.

The rest of your message then goes on to vividly demonstrate why
decorators make for a poor test technique.

Is this an April Fools gag? If so, it's not a very good one as it's quite
in line with the sort of question I've seen many times before. "I have
a hammer, how do I use it to inflate my tire?"

Assuming you're serious, why not use one of the many testing technologies
actually designed for it, and tap into the associated body of knowledge on
how to accomplish various tasks? Start with what you're trying to do, then
work on how to do it. 


From tiissa at nonfree.fr  Sun Apr 17 06:07:34 2005
From: tiissa at nonfree.fr (tiissa)
Date: Sun, 17 Apr 2005 12:07:34 +0200
Subject: Pattern Matching Given # of Characters and no String Input; use
 RegularExpressions?
In-Reply-To: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
Message-ID: <42623565$0$3566$626a14ce@news.free.fr>

Synonymous wrote:
> Can regular expressions compare file names to one another. It seems RE
> can only compare with input i give it, while I want it to compare
> amongst itself and give me matches if the first x characters are
> similiar.
Do you have to use regular expressions?

If you know the number of characters to match can't you just compare slices?

In [1]: f1,f2='cccat','cccap'

In [2]: f1[:3]
Out[2]: 'ccc'

In [3]: f1[:3]==f2[:3]
Out[3]: True

It seems to me you just have to compare each file to the next one (after 
having sorted your list).


From rdm at rcblue.com  Thu Apr 14 21:40:43 2005
From: rdm at rcblue.com (Dick Moores)
Date: Thu, 14 Apr 2005 18:40:43 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <425DFFCF.3020800@holdenweb.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
	<d3kjb0$pk6$2@sea.gmane.org>
	<6.2.1.2.2.20050413200623.0568d1b0@rcblue.com>
	<425DFFCF.3020800@holdenweb.com>
Message-ID: <6.2.1.2.2.20050414183844.06302120@rcblue.com>

Steve Holden wrote at 22:29 4/13/2005:
>Dick Moores wrote:
>>Steve Holden wrote at 19:12 4/13/2005:
>>
>>>Dick Moores wrote:
>>>
>>>>Dan wrote at 18:02 4/13/2005:
>>>>
>>>>>On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
>>>>>wrote:
>>>>>
>>>>> > I'm just trying to help an artist acquaintance who needs (I just
>>>>> >learned) the first 3003 digits of pi to the base 12.
>>>>>
>>>>>Now you've got me curious.  Why would an artist want the first 3003
>>>>>digits of pi to the base 12?
>>>>
>>>>
>>>>He says,
>>>>Do you know how I can get "base12 pi"?
>>>>Because the chromatic scale is base12.
>>>>c c# d d# e f f# g g# a a# b
>>>>Dick
>>>
>>>So it's, like, the guy is going to "play pi"? So why does the melody 
>>>have 3003 notes?
>>
>>Sorry, he's just a friend of a friend. If I find out I'll post. Here's 
>>his site if you want to poke around for yourself. Maybe his email 
>>address is there.
>>Dick
>Where?

Sorry about that. <http://www.kenjikojima.com/>

Dick




From vinay_sajip at yahoo.co.uk  Fri Apr 29 13:42:21 2005
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: Fri, 29 Apr 2005 17:42:21 +0000 (UTC)
Subject: __del__ and logging
References: <5Clce.76603$Io7.4986997@phobos.telenet-ops.be>
Message-ID: <loom.20050429T194019-490@post.gmane.org>

flupke <flupke <at> nonexistingdomain.com> writes:

> 
> Hi,
> 
> i have a class and a class attribute log which is a logger object. In 
> the __del__() function i want to log a message but it fails even if i 
> use self.__class__.log.
> 
> The error i get is this:
> Traceback (most recent call last):
>    File "C:\Python24\lib\logging\__init__.py", line 712, in emit
>      self.stream.write(fs % msg)
> ValueError: I/O operation on closed file
> 
> So is there no way to use the logger object in a __del__
> I wanted to use the message to clearly indicate in the logger file that 
> the instance had closed ok.
> 

It all depends. If your __del__ is being called via atexit() for application
cleanup, for example, logging may not be available to you because it has been
cleaned up beforehand.

The logging module registers an atexit() handler to flush and close handlers
before script termination.

Vinay Sajip




From mail2spj at yahoo.com  Wed Apr  6 09:22:26 2005
From: mail2spj at yahoo.com (SPJ)
Date: Wed, 6 Apr 2005 06:22:26 -0700 (PDT)
Subject: formatting file
Message-ID: <20050406132226.25060.qmail@web50110.mail.yahoo.com>

Hi,

I am new to python hence posing this question.
I have a file with the following format:

test1    1.1-1   installed
test1    1.1-1   update
test2    2.1-1   installed
test2    2.1-2   update

I want the file to be formatted in the following way:

test1    1.1-1   1.1-2
test2    2.1-1   2.1-2

How can I achieve this? I am stuck here.

Thanks in advance.
spj


		
__________________________________ 
Yahoo! Messenger 
Show us what our next emoticon should look like. Join the fun. 
http://www.advision.webevents.yahoo.com/emoticontest


From bvande at po-box.mcgill.ca  Sun Apr 17 12:47:11 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Sun, 17 Apr 2005 12:47:11 -0400
Subject: pydoc preference for triple double over triple single quotes
 -- anyreason?
In-Reply-To: <42617449_3@newspeer2.tds.net>
References: <mailman.2008.1113679688.1799.python-list@python.org>
	<42617449_3@newspeer2.tds.net>
Message-ID: <4262930F.2050906@po-box.mcgill.ca>

Kent Johnson said unto the world upon 2005-04-16 16:41:
> Brian van den Broek wrote:
> 
>> Hi all,
>>
>> I'm posting partly so my problem and solution might be more easily 
>> found by google, and partly out of mere curiosity.
>>
>> I've just spent a frustrating bit of time figuring out why pydoc 
>> didn't extract a description from my module docstrings. Even though I 
>> had a well formed docstring (one line, followed by a blank line, 
>> followed by the rest of the docstring), when I ran Module docs, my 
>> modules showed up as having "no description". ("Module docs" referring 
>> to the shortcut installed on Windows that launches the pydoc server.)
> 
> 
> ?? It works for me with triple-single quoted strings...from a quick look 
> it appears that pydoc uses inspect which looks at the __doc__ attribute; 
> do your modules have __doc__ attributes?
> 
> Kent


Thanks for the reply, Kent. (Also to Thomas in another reply addressed 
below.)

Kent, that's odd. My module does have a valid docstring and hence a 
__doc__ attribute (I did explicitly check). help(my_module) works fine 
at the prompt. It is just the results list in the TKinter interface to 
the pydoc server application that doesn't seem to pick up my module's 
description (in the first line of its docstring) when the docstring is 
triple-single quoted.

Either way, it's no big deal; my post was at least as much to have a 
googleable record of the situation as to figure out why. That said, it 
still does puzzle me that the pydoc server treats the two styles of 
triple quoted docstrings differently on my system (Python 2.4.1, 
Windows Me).

Thomas suggested the preference might be related to Emacs 
behaviour--that is something I know little about :-)

He also suggested that it could be that pydoc is following the PEP 257 
<http://www.python.org/peps/pep-0257.html> recommendation to use 
triple-double quoting. That might be, but if that's the explanation, 
it just pushes the puzzle up a level for me :-)

Anyway, thanks again to both,

Brian vdB



From codecraig at gmail.com  Fri Apr 15 13:52:45 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 10:52:45 -0700
Subject: py2exe - create one EXE
In-Reply-To: <mailman.1981.1113585595.1799.python-list@python.org>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<mailman.1977.1113579964.1799.python-list@python.org>
	<1113580317.027071.183640@z14g2000cwz.googlegroups.com>
	<1113582492.351604.257570@z14g2000cwz.googlegroups.com>
	<1113584585.082256.246110@z14g2000cwz.googlegroups.com>
	<mailman.1981.1113585595.1799.python-list@python.org>
Message-ID: <1113587565.029516.175770@g14g2000cwa.googlegroups.com>

So how there is currently available way to have 1 .exe which includes
everything needed to run a python app?

:sigh:



From max at alcyone.com  Tue Apr  5 14:55:48 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 05 Apr 2005 11:55:48 -0700
Subject: playing with pyGoogle - strange codec error
In-Reply-To: <2005040513115616807%brian@brianandkatecom>
References: <2005040410062316807%brian@brianandkatecom>
	<2005040513115616807%brian@brianandkatecom>
Message-ID: <xc-dne0eN-WpQs_fRVn-oQ@speakeasy.net>

Brian Blazer wrote:

> You know, I am beginning to think that I MAY have stumbled on a bug 
> here.  At first I was thinking that this issue was related to the 
> offending character being out of range for the Mac.  Then I tried it on 
> A MS machine and a linux box; all with the same error.

The problem, common to all three, is that you're using a terminal whose 
default encoding doesn't specify a valid encoding for the copyright 
character (in the first case, the default encoding is 'ascii'; it is 
likely the case for the others, as well).

When you print a Unicode string, by default it is encoded to your 
default encoding.  The problem is this cannot be done faithfully with a 
string containing a non-ASCII symbol (like the copyright character which 
is actually triggering it for you).  So, consequently, the encoding is 
failing with an error.

What you probably want here is either to use another encoding, or to 
specify what to do in the case that the encoding is not possible. 
Either encode to a different encoding (one which you know your terminal 
supports even though it is not detected, e.g., 'latin-1'), or specify 
what to do with errors in the encoding (e.g., 'ignore', which removes 
the offending characters, or 'replace', which replaces them with 
question marks):

	aUnicodeString.decode('latin-1')
	aUnicodeString.decode('ascii', 'replace')

> This does not happen when I wrote the same script in java.  This is 
> making me wonder if there is an issue with the wrapper for the google 
> api that was originally done in java.

Java does not handle Unicode the same way.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Drifting from woman-who-tries misconstrued / Shifting to woman-wise
   -- Lamya


From grante at visi.com  Thu Apr 21 13:39:27 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 21 Apr 2005 17:39:27 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com> <d48heh$goe$1@n6.co.ru>
Message-ID: <116fpafinu1967a@corp.supernews.com>

On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> Grant Edwards <grante at visi.com> writes:
>
>> On 2005-04-21, Peter Maas <peter at somewhere.com> wrote:
>> > Maxim Kasimov schrieb:
>> >> but what if i just can't to do this becouse i'm working thrue ssh, and 
>> >> have to use only installed editors (such as vi)
>> >
>> > - at first line of block enter: ma (mark line as 'a')
>> > - go to last line of block
>> > - enter :'a,.s/^/###/ (insert 3 comment chars at begin of line,
>> >    starting from line marked as 'a' to current line)
>> 
>> Sure, but what about the case where his program is on paper
>> tape and all he has for an editor is an ice pick?
>
> Then inserting goto doesn't seem to be an acceptable option either ;)

Scissors, tape, and a box full of prepunched "goto" and "label"
statements.  Of course you could do the same with a bunch of
pre-punched """ tape-chunks.

-- 
Grant Edwards                   grante             Yow!  Yow! Am I in
                                  at               Milwaukee?
                               visi.com            


From radam2 at tampabay.rr.com  Fri Apr 29 16:57:21 2005
From: radam2 at tampabay.rr.com (Ron Adam)
Date: Fri, 29 Apr 2005 20:57:21 GMT
Subject: Can'r run BLT twice?
In-Reply-To: <1114717764.808143.317510@o13g2000cwo.googlegroups.com>
References: <1114717764.808143.317510@o13g2000cwo.googlegroups.com>
Message-ID: <Rcxce.32129$5f.11090@tornado.tampabay.rr.com>

Todd Krein wrote:
> I'm running PythonWin on XP. When I run my plotter program the first
> time, it works fine. The second time I run it, I get the following
> error. If I exit PythonWin, and restart, I can again run it once. Any
> ideas?
> 
> Error: 1
> TclError Exception in Tk callback
>   Function: <bound method PathEval.doOpenTrace of <__main__.PathEval
> instance at 0x0127AC60>> (type: <type 'instancemethod'>)
>   Args: ()
> Traceback (innermost last):
>   File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBase.py", line 1747, in
> __call__
>     None
>   File
> "C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
> line 89, in doOpenTrace
>     self.doPlotTrace()                          # go plot the thing
>   File
> "C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
> line 117, in doPlotTrace
>     self.graph = Pmw.Blt.Graph(tkRoot)                   # make a new
> graph area
>   File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBlt.py", line 260, in
> __init__
>     None
>   File "C:\Python24\lib\lib-tk\Tkinter.py", line 1861, in __init__
>     self.tk.call(
> TclError: invalid command name "::blt::graph"
> 

I think this is why I'm using a stand alone editor when I use BLT.  It 
seems that both pythonwin and idle don't completely clear and reload 
things in between runs.

My application works just fine when I run it from the command line, or 
click the icon to start it.  I don't have any problems with starting it 
from an exe using py2exe either.

I'm currently using the free version of EditPad Pro, the full version 
has a spelling checker built in.  It's loads up fast and can run 
external programs on the current document and capture the results and 
the errors in separate panels.  It also supports syntax highlighting for 
pthon (and a dozen other languages).

Cheers,
Ron Adam


From tim.peters at gmail.com  Fri Apr  1 23:32:47 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 1 Apr 2005 23:32:47 -0500
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
	Flaw
In-Reply-To: <Rdo3e.21051$d5.155911@newsb.telia.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
Message-ID: <1f7befae05040120321a72597b@mail.gmail.com>

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

[Sunnan]
> Can anyone please point me to the text that quote was taken from? I
> tried to use a search engine but I only found quotations, not the source.

That's because it was originally in email to a company-internal
mailing list.  If you're willing to move to Fredericksburg, VA and
work for Zope Corp, perhaps they'll let you in to the PythonLabs list
archives.  Fair warning:  I work for Zope Corp, and I'm not sure I can
get into those archives.  So don't switch jobs _just_ for that.


From vegeta.z at gmail.com  Tue Apr 19 16:09:00 2005
From: vegeta.z at gmail.com (vegetax)
Date: Tue, 19 Apr 2005 16:09:00 -0400
Subject: poll: does name conventions in python matters?
Message-ID: <d43o8q$ovb$1@sea.gmane.org>

in python it is common to see naming
inconsistencies ,methods,modules,packages,classes with names in every
posible style:
thisisalongmethod
ThisIsALongMethod
thisIsALongMethod
this_is_a_long_method
and even This_Is_A_Long_Method
All over the place,even within one module!

classic static languages dont really need naming conventions, on the other
side dynamic languages must have it(in my opinion),since there is a lot of
syntax variability and very short constructors, a clear example is what
does this means?
c = Required(2)
is it a method which returns an object or is it a class constructor?
this kind of situation greatly decrease readability.

whats your opinion on the matter?

a) dont care about naming conventions, i use the one i like
b) didnt know python has naming conventions,nobody follows them
c) naming convention doesnt matters
d) i would use one if there was a clear and concise document about python 
naming style(python style guide is vague)
e) i think is very important for readability of source code and easier to
use libraries
d) other, explain please

if you care about it,how could be fixed?

if clear conventions were defined,would you change your current naming
style?

stdlib modules are not going to be touched,but for any new proyect i think
python would benefit from an improved,well defined,strict style guide,the
one now(http://www.python.org/doc/essays/styleguide.html) is so vague that
is not helpfull at all.

Ruby for example have a clear naming convention,if python had one,it would
benefit greater than ruby,since python source code is much more readable as
it is,but it could be better.




From lbates at syscononline.com  Tue Apr  5 08:47:37 2005
From: lbates at syscononline.com (Larry Bates)
Date: Tue, 05 Apr 2005 07:47:37 -0500
Subject: Python IDE like NetBeans/Delphi IDE
In-Reply-To: <mailman.1376.1112702768.1799.python-list@python.org>
References: <mailman.1376.1112702768.1799.python-list@python.org>
Message-ID: <2ZadnddAcaxOFc_fRVn-ig@comcast.com>

Take a look at ActiveState:

http://www.activestate.com/Products/ActivePythonFamily/?_x=1

or for something more general:

http://www.eclipse.org/

Larry Bates


fowlertrainer at anonym.hu wrote:
> Hi !
> 
> I search for an IDE that working in Windows, and knows these functions:
> 
> A.) Automatic name searching/showing/extending on classes with
> keypressing (like Netbeans, or Delphi Ctrl+Space).
> B.) Debugging: breakpoints, step on lines (code), watch variables.
> 
> Or A and B both.
> 
> Please help me.
> 
> Thanx:
> ft
> 


From hemanthps at gmail.com  Mon Apr 18 03:55:17 2005
From: hemanthps at gmail.com (hemanth)
Date: 18 Apr 2005 00:55:17 -0700
Subject: ANN: Veusz 0.5 - a scientific plotting package
References: <mailman.2027.1113746240.1799.python-announce-list@python.org>
	<mailman.2036.1113789043.1799.python-list@python.org>
Message-ID: <1113810917.134164.113060@g14g2000cwa.googlegroups.com>

Why not matplotlib? Of late, it has seemed to have picked up
a lot of attention. I would prefer that the different plotting
packages developers join hands and implement missing features
into a single plotting package and make this a part of Python
standard library. In contrast to the various web frameworks we
now have in Python, it is preferable to have atleast one plotting
package as a standard Python package.



From ckwiguno at gmail.com  Sun Apr 24 14:52:41 2005
From: ckwiguno at gmail.com (Clara)
Date: 24 Apr 2005 11:52:41 -0700
Subject: opening new window in one window using Tkinter -- Help please
In-Reply-To: <mailman.2414.1114367330.1799.python-list@python.org>
References: <1114365774.690048.280150@l41g2000cwc.googlegroups.com>
	<mailman.2414.1114367330.1799.python-list@python.org>
Message-ID: <1114368761.451299.76370@g14g2000cwa.googlegroups.com>

Forgive my ignorance, but where do I call withdraw?



From radam2_ at _tampabay.rr.com  Tue Apr 19 02:25:36 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Tue, 19 Apr 2005 06:25:36 GMT
Subject: pre-PEP: Simple Thunks
References: <3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
	<3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
	<Pine.A41.4.61b.0504171920010.34498@dante69.u.washington.edu>
	<eve761hv7vjktfppqb51eigi9otl0fldh6@4ax.com>
	<Pine.A41.4.61b.0504181043530.113056@dante74.u.washington.edu>
Message-ID: <p4696196246vskcj3bua373fpvbf64hd2o@4ax.com>

On Mon, 18 Apr 2005 21:11:52 -0700, Brian Sabbey
<sabbey at u.washington.edu> wrote:

>Ron_Adam wrote:
>> The load and dump would be private to the data class object. Here's a
>> more complete example.
>>
>> import pickle
>> class PickledData(object):
>> 	def __init__(self, filename):
>> 		self.filename = filename
>> 		self.L = None
>> 		try:
>> 			self._load()
>> 		except IOError:
>> 			self.L = []
>> 	def _load(self):
>> 		f = open(self.filename, 'r')
>> 		self.L = pickle.load(f)
>> 		f.close()
>> 	def _update(self):
>> 		f = open(self.filename, 'w')
>> 		pickle.dump(self.L, f)
>> 		f.close()
>> 	def append(self, record):
>> 		self.L.append(record)
>> 		self._update()
>> 	# add other methods as needed ie.. get, sort, clear, etc...
>>
>> pdata = PickledData('filename')
>>
>> pdata.append('more data')
>> pdata.append('even more data')
>>
>> print pdata.L
>> ['more data', 'even more data']
>>
>>
>>> This has the same issues as with opening and closing files:  losing the
>>> 'dump', having to always use try/finally if needed, accidentally
>>> re-binding 'p', significantly more lines.  Moreover, class 'Pickled' won't
>>> be as readable as the 'pickled_file' function above since 'load' and
>>> 'dump' are separate methods that share data through 'self'.
>>
>> A few more lines to create the class, but it encapsulates the data
>> object better. It is also reusable and extendable.
>
>This class isn't reusable in the case that one wants to pickle something 
>other than an array.  Every type of object that one would wish to pickle 
>would require its own class.

...Or in a function, or the 3 to 6 lines of pickle code someplace.
Many programs would load data when they start, and then save it when
the user requests it to be saved.  So there is no one method fits all
situations.  Your thunk example does handle some things better.


Here's yet another way to do it, but it has some limitations as well.

import pickle
def pickle_it(filename, obj, commands):
    try:
        f = open(filename, 'r')    
        obj = pickle.load(f)
        f.close()
    except IOError:
        pass 	
    for i in commands:
        i[0](i[1])
    f = open(filename, 'w')
    pickle.dump(obj, f)
    f.close()
 
file = 'filename'
L = []

opps = [ (L.append,'more data'),
         (L.append,'even more data') ]
pickle_it(file, L, opps)


>Also, this implementation behaves differently because the object is 
>re-pickled after every modification.  This could be a problem when writing 
>over a network, or to a shared resource.
>
>-Brian

In some cases writing to the file after ever modification would be
desired.  A way around that would be to use a buffer of some sort. But
then again, that adds another level of complexity and you would have
to insure it's flushed at some point which get's back to the issue of
not closing a file. 

Thanks for explaining how thunks works.  I'm still undecided on
whether it should be built in feature or not. 

I would rather have a way to store a block of code and pass it to a
function, then execute it at the desired time.  That would solve both
the issue where you would use a thunk, and replace lambdas as well.
But I understand there's a lot of resistance to that because of the
potential abuse.

Cheers,
Ron



From lbates at syscononline.com  Mon Apr 18 11:14:15 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 18 Apr 2005 10:14:15 -0500
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
Message-ID: <F7KdnSD_t-AnU_7fRVn-qg@comcast.com>

Don't write off Zope2/Plone too quickly.  Zope is making many of
the extensions/features in Zope3 available in Zope2 (V2.8+).  As
with any LARGE application, Zope2 is much more mature than the
newer Zope3.  It will also be extremely difficult to find
programmers/consultants with any Zope3 experience.  Plone's CMF
is going to be very hard to beat.

-Larry Bates


Mir Nazim wrote:
> Hi there.
> 
> I am about to undertake a project. My employer wants it to be developed
> in PHP. While I was thinking that Python will be better for this job.
> 
> The project will implement the functionality similar to Yahoo360
> (http://www.360.yahoo.com), http://www.Tribe.net, Orkut etc.
> 
> 1) There will be a groups like functionality like google groups.
> 2) Groups/personal blogs/albums/events/buddy lists etc. need to be
> implemented.
> 3) Most importantly it needs to be implemented like platform. that is
> it has to expose API or web services so that application implemented on
> it can talk to each other and other applications can talk to it.
> 
> My employer wants to go with PHP because almost all the functionality
> is available with a Drupal CMS for PHP. But it is important to note
> that for an application, rather a platform, which is intended to be
> used for a long time, time to implement should not be the major
> criteria above good design and maintainability(in which python scores
> highest).
> 
> IMHO Zope3/Quixote seem to be the obvious choice here. Though
> functionality is not available on them but i think time spent now will
> be gained by gains in better design and maintainable code base.
> 
> Now I want this wonderful c.l.py community to pour in their suggestions
> on what would be better alternatives. Also may we try various
> combinations of frameworks like Zope3 for components, Twisted2.0 for
> network functionality etc.
> 
> PS: I am leaving out Zope2.x and Twisted1.x as a lot has changed in
> newer versions and I don't want to be hanged when Zope3 becomes
> official.
> 
> Thanks 
> 
> ---
> Mir Nazim
> 


From bokr at oz.net  Tue Apr 19 18:31:37 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 22:31:37 GMT
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<mailman.2066.1113863546.1799.python-list@python.org>
	<1113898210.973052.255840@l41g2000cwc.googlegroups.com>
Message-ID: <4265826d.5912361@news.oz.net>

On 19 Apr 2005 01:10:11 -0700, "George Sakkis" <gsakkis at rutgers.edu> wrote:

>Fran=E7ois Pinard wrote:
>
>> The most useful place for implicit tuple unpacking, in my experience,
>> is likely  at the left of the `in' keyword in `for' statements (and
>> it is even nicer when one avoids extraneous parentheses).
>
>.=2E. and would be nicest (IMO) if default arguments and *varargs were
>allowed too; check http://tinyurl.com/dcb2q for a relevant thread.
>
You can be a little devious about the left of the 'in' in 'for' statements:

----< tupk.py >------------------------------
class Tupk(object):
    def _fset(self, arg):
        # implement unpacking (a, (x, y='default'))
        self.a = arg[0]
        if type(arg[1]) is not tuple: # accept (a, x) in place of (a,(x,))
            self.x = arg[1]
            self.y = 'default for non-tuple'
        else:
            self.x = arg[1][0]
            self.y = len(arg[1])==2 and arg[1][1] or 'default'
    u = property(fset=_fset)
    def __iter__(self):
        return iter((self.a, self.x, self.y))

def test():
    upk = Tupk()
    for upk.u in [(1,(2,3)), (4,(5,)), (7,8)]:
        print upk.a, upk.x, upk.y
    upk.u = (9,10)
    a,b,c = upk
    print 'a=%r, b=%r, c=%r' % (a,b,c)
    print list(upk), tuple(upk)

if __name__=='__main__': test()
---------------------------------------------
Output:
 >>> import tupk
 >>> tupk.test()
 1 2 3
 4 5 default
 7 8 default for non-tuple
 a=9, b=10, c='default for non-tuple'
 [9, 10, 'default for non-tuple'] (9, 10, 'default for non-tuple')
 >>>

You could obviously give Tupk an __init__(fmt, defaults) method that would accept
an unpacking spec like  'a, (x, y=%0))', [<default-value 0>]
And give its instances a __call__ method so you can use it like
    a,b,c = upk('a, (x, y=%0))', [555])((7,8)) => a,b,c == (7, 8, 555)

How useful how often though?

Regards,
Bengt Richter


From eric_brunel at despammed.com  Thu Apr 14 04:12:19 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 14 Apr 2005 10:12:19 +0200
Subject: Simple Python + Tk text editor
References: <425D6641.5050906@pytex.org> <7xfyxuqxe3.fsf@ruckus.brouhaha.com>
	<425E0286.2020402@pytex.org>
Message-ID: <opso7qetgdrqur0o@eb.pragmadev>

On Thu, 14 Apr 2005 06:41:26 +0100, Jonathan Fine <jfine at pytex.org> wrote:
[snip]
> And for my project (integration of Python and TeX) there
> is most unlikely to be a better one.

Do you know the (apparently dead) project named e:doc? You can find it here:
http://members.nextra.at/hfbuch/edoc/
It's a kind of word processor that can produce final documents to various formats using backends, and one of the backends is for LaTeX.

It's written in Perl, but with Perl::Tk as a tool-kit, so it is quite close to Tkinter. There may be some ideas to steal from it.

HTH
-- 
python -c 'print "".join([chr(154 - ord(c)) for c in "U(17zX(%,5.z^5(17l8(%,5.Z*(93-965$l7+-"])'


From mwm at mired.org  Tue Apr 12 00:35:48 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 11 Apr 2005 23:35:48 -0500
Subject: Checking for the status of a device (before connection)... --
 (John McCormick)
References: <mailman.1690.1113232102.1799.python-list@python.org>
Message-ID: <86r7hgvcgr.fsf@guru.mired.org>

Mccormick.Johnw at epamail.epa.gov writes:

> Hello, ... I am John McCormick (Systems Programmer ) and I am currently
> working on a python program which will connect (user) specified inputs
> and connect them to (user) selected outputs (like screen or
> video/audio-recording devices) and would like to know if there's a
> technique to "test" or "sense" if the desired output device is busy
> without interrupting the output device while checking to see if it's
> busy... ?? If, perhaps, python does not have this type of feature, I
> wonder if you could give me some type of direction (ie., manufacturer's
> device response checking techniques that could be used in conjunction
> with python) but the bottom line is not to "crash" or interrupt the
> desired output device (if it's still busy)...

That's a very device - and platform! - specific thing to want to
do. On Unix, you would typically open() the /dev/device file and
perform an ioctl on it to see if it was busy - assuming it supported
that kind of operation at all. The exact ioctl call would depend on
the device, as there really isn't a standard for them.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tundra at tundraware.com  Thu Apr 21 04:27:30 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 21 Apr 2005 04:27:30 EDT
Subject: python LEX
In-Reply-To: <d47mli$d1v$1@bagan.srce.hr>
References: <d47mli$d1v$1@bagan.srce.hr>
Message-ID: <gs4kj2-uim.ln1@eskimo.tundraware.com>

jozo wrote:

> I have to work on python lexical definition in Lex. I spent lots of my
> time to find regular expresions written for Lex of Python language but
> nothing.
> Can somebody help me?
> 
> I nEED hELP 
> 
> 
http://systems.cs.uchicago.edu/ply/

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From fredrik at pythonware.com  Sat Apr 16 13:00:27 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 16 Apr 2005 19:00:27 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<4261304c_1@newspeer2.tds.net>
Message-ID: <d3rg34$udi$1@sea.gmane.org>

Kent Johnson wrote:

>> So I would like to parse a XML file one record at a time and then be able
>> to store the information in another object.
> 
> You might be interested in this recipe using ElementTree:
> http://online.effbot.org/2004_12_01_archive.htm#element-generator

if you have ElementTree 1.2.5 or later, the "iterparse" function provides a
more efficient implementation of that pattern:

    http://effbot.org/zone/element-iterparse.htm

the cElementTree implemention of "iterparse" is a lot faster than SAX; see
the second table under

    http://effbot.org/zone/celementtree.htm#benchmarks

for some figures.

</F>



From sidharth.kuruvila at gmail.com  Fri Apr  8 17:44:09 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Sat, 9 Apr 2005 03:14:09 +0530
Subject: Exception Handling
In-Reply-To: <1112995780.656492.18540@o13g2000cwo.googlegroups.com>
References: <1112995780.656492.18540@o13g2000cwo.googlegroups.com>
Message-ID: <2ab2ed5505040814441bd38293@mail.gmail.com>

Have a look at the chapter on exceptions in the python tutorial its pretty good.
http://docs.python.org/tut/node10.html

On 8 Apr 2005 14:29:40 -0700, SuperJared <jared.kuolt at gmail.com> wrote:
> I'm new to Python, well versed in PHP and a bit of Perl.
> 
> I've written a simple backup utility that FTPs from one server to
> another. I'd like to implement exception handling on the FTP should
> someting go wrong.
> 
> This is basically what I have so far:
> 
> try:
>    ftp = FTP(ftp_host, ftp_user, ftp_pass)
>    ftp.storbinary('STOR ' + filename, pointer)
>    ftp.close()
> except:
>    # do something with an error message here...?
> 
> I'd like to use 'all_errors' but I don't know how! Will I have to
> create a handler for each other exception?
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From codecraig at gmail.com  Fri Apr 15 09:03:06 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 06:03:06 -0700
Subject: Determine ip address
Message-ID: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>

hi,
   how can i use python to figure the ip address of the machine which
the python script is running on?  I dont mean like 127.0.0.1....but i
want the external IP address (such as ipconfig on windows displays).

any ideas??

THanks



From Sebastien.Boisgerault at gmail.com  Fri Apr  1 12:00:02 2005
From: Sebastien.Boisgerault at gmail.com (boisgera)
Date: 1 Apr 2005 09:00:02 -0800
Subject: property and virtuality
References: <mailman.1128.1112268435.1799.python-list@python.org>
Message-ID: <375f545c.0504010900.5da0c285@posting.google.com>

Laszlo Zsolt Nagy <gandalf at geochemsource.com> wrote in message news:<mailman.1128.1112268435.1799.python-list at python.org>...
> My problem is about properties and the virtuality of the methods. I 
> would like to create a property whose get and set methods
> are virtual. I had the same problems in Delphi before and the solution 
> was the same. I created a private _get method and a public
> get method. The former one will call the latter. 
> [...]
> I cannot override C2._getname instead, because c2.name would print 
> 'Test2" instead of lala. Clearly, the property stores a reference to the 
> get and set methods and it is not possible to have it use the new 
> methods.  Creating a new property is the worst - need to duplicate code 
> and also C3.name is C1.name returns False. :-) It is not a big problem 
> because I found the solution just I wonder if there is a better way to 
> "virtualize" property get/set functions.

Alex Martelli has demonstrated the same technique to "fix" this
disturbing property behavior during one of its talk at Pycon 2005:

http://www.python.org/pycon/2005/papers/36/ (slides p.7&8)

... from this I infer that you found the best fix available ;)

Regards,

S?bastien


From greg at cosc.canterbury.ac.nz  Wed Apr 20 02:06:12 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 18:06:12 +1200
Subject: Enumerating formatting strings
In-Reply-To: <mailman.2061.1113855968.1799.python-list@python.org>
References: <mailman.2061.1113855968.1799.python-list@python.org>
Message-ID: <3cm9r2F6nif67U1@individual.net>

Steve Holden wrote:

> I've been wondering whether it's possible to perform a similar analysis 
> on non-mapping-type format strings, so as to know how long a tuple to 
> provide,

I just tried an experiment, and it doesn't seem to be possible.

The problem seems to be that it expects the arguments to be
in the form of a tuple, and if you give it something else,
it wraps it up in a 1-element tuple and uses that instead.

This seems to happen even with a custom subclass of tuple,
so it must be doing an exact type check.

So it looks like you'll have to parse the format string.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From enjoy_linux at hotmail.com  Wed Apr 13 05:54:39 2005
From: enjoy_linux at hotmail.com (MaHahaXixi)
Date: Wed, 13 Apr 2005 17:54:39 +0800
Subject: how to explain such codes, python's bug or mine?
Message-ID: <d3iqhe$1s0l$1@mail.cn99.com>

>>> j = range(20)
>>> print j
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
>>> for k in j:
 if k <= 10:
  j.remove(k)


>>> print j
[1, 3, 5, 7, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19]
>>>


Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
win32
Type "copyright", "credits" or "license()" for more information.

i think python do convert there codes to such style:
for (i = 0; i < len(j); i++)
   k = j[i]
   ......



what do u think?




From ivanlan at pauahtun.org  Wed Apr  6 11:06:50 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Wed, 06 Apr 2005 09:06:50 -0600
Subject: shebang in cross platform scripts
References: <d30om0$lb4$1@solaris.cc.vt.edu>
	<8c7f10c605040607015d7cb7d5@mail.gmail.com>
Message-ID: <4253FB0A.7EF0B8CA@pauahtun.org>

Hi All--

Simon Brunning wrote:
> 
> On Apr 6, 2005 2:37 PM, rbt <rbt at athop1.ath.vt.edu> wrote:
> 
> > Does the line below have any negative impact on Windows machines? I
> > develop and test mostly on Unix, but my scripts are often used on Win
> > systems too.
> >
> > #!/usr/bin/env python
> 
> Nope. On Windows it's just a comment.
> 

It works fine using cygwin, uwin, mks and pdksh, all available for
Windows.  Google is your friend.

Symbolic links also work under uwin (don't know for sure about the
others).  That means you can install a link in /usr/bin to whereever
python lives, and expect #!/usr/bin/python to work just fine.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From news1 at phppeanutsREMOVE-THIS.org  Thu Apr 14 13:16:07 2005
From: news1 at phppeanutsREMOVE-THIS.org (Henk Verhoeven)
Date: Thu, 14 Apr 2005 19:16:07 +0200
Subject: Web Application Client Module
In-Reply-To: <9LGdnTRlLP76GcHfRVn-qA@comcast.com>
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
	<9LGdnTRlLP76GcHfRVn-qA@comcast.com>
Message-ID: <d3m8g1$uec$1@news2.zwoll1.ov.home.nl>

Chung Leong wrote:
> 
> It's easy. Just create an application that hosts the MSHTML ActiveX control
> (IE itself minus the interface). With tools like Delphi or Visual Basic,
> it's literally a matter of dragging and dropping the control into the form.
> Even in Visual C++ it's not that hard.
> 
Hi Chung ,

Of coure i want to ship my personal browser with my products too :-),
but will this be immune to those popup blockers?

Thanks,

Henk Verhoeven.


From jerf at jerf.org  Fri Apr  1 16:52:53 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 16:52:53 -0500
Subject: How To Do It Faster?!?
References: <mailman.1129.1112269121.1799.python-list@python.org>
Message-ID: <pan.2005.03.31.20.04.21.486558@jerf.org>

On Thu, 31 Mar 2005 13:38:34 +0200, andrea.gavana wrote:

> Hello NG,
> 
>       in my application, I use os.walk() to walk on a BIG directory. I
>       need
> to retrieve the files, in each sub-directory, that are owned by a
> particular user. Noting that I am on Windows (2000 or XP), this is what I
> do:

You should *try* directly retrieving the relevant information from the OS,
instead of spawning a "dir" process. I have no idea how to do that and it
will probably require the win32 extensions for Python.

After that, you're done. Odds are you'll be disk bound. In fact, you may
get no gain if Windows is optimized enough that the process you describe
below is *still* disk-bound.

Your only hope then is two things:

* Poke around in the Windows API for a function that does what you want,
and hope it can do it faster due to being in the kernel.

* Somehow work this out to be lazy so it tries to grab what the user is
looking at, instead of absolutely everything. Whether or not this will
work depends on your application. If you post more information about how
you are using this data, I can try to help you. (I've had some experience
in this domain, but what is good heavily depends on what you are doing.
For instance, if you're batch processing a whole bunch of records after
the user gave a bulk command, there's not much you can do. But if they're
looking at something in a Windows Explorer-like tree view, there's a lot
you can do to improve responsiveness, even if you can't speed up the
process overall.)


From mrovner at propel.com  Wed Apr  6 15:23:05 2005
From: mrovner at propel.com (Mike Rovner)
Date: Wed, 06 Apr 2005 12:23:05 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
Message-ID: <d31cqt$lhs$1@sea.gmane.org>

ritterhaus at yahoo.com wrote:
> ... SHOULD toggle On and Off four times with one-second pauses. When I
> run this, the loop pauses the full eight seconds then prints the Ons
> and Offs all at once. What's up with that?

Run your script as:

python -u script.py

for unbuffered output.



From michele.simionato at gmail.com  Fri Apr 29 12:58:49 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 29 Apr 2005 09:58:49 -0700
Subject: doctest's ELLIPSIS
In-Reply-To: <1114792468.495670.98150@z14g2000cwz.googlegroups.com>
References: <1114789524.038880.312510@g14g2000cwa.googlegroups.com>
	<1114790657.829547.59680@g14g2000cwa.googlegroups.com>
	<1114792468.495670.98150@z14g2000cwz.googlegroups.com>
Message-ID: <1114793929.180986.195870@o13g2000cwo.googlegroups.com>

I would file a bug report/documentation bug/feature
request or whatever to sourceforge.

         Michele Simionato



From phil at riverbankcomputing.co.uk  Fri Apr 22 19:46:04 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sat, 23 Apr 2005 00:46:04 +0100
Subject: gui developing
In-Reply-To: <87wtqulfqs.fsf@pobox.com>
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<mailman.2300.1114197628.1799.python-list@python.org>
	<87wtqulfqs.fsf@pobox.com>
Message-ID: <200504230046.04794.phil@riverbankcomputing.co.uk>

On Friday 22 April 2005 9:26 pm, John J. Lee wrote:
> "R. C. James Harlow" <james at wrong.nu> writes:
> > On Friday 22 April 2005 20:07, Grant Edwards wrote:
> > > I've never tried Qt.
> >
> > Qt, in my opinion, is as excellent as python in the consistency stakes,
> > has the best documentation bar none, an excellent set of python bindings,
> > the best free layout tool, and an active and helpful community.
>
> Qt's technical superiority is unchallenged (pretty much).
>
> > The killer, of course, is that there's no free windows port, so if you're
> > doing free software that you want to run on linux then you're stuffed.
>
> Soon to change: Qt 4 for Windows (and the corresponding PyQt) will be
> available under the GPL.  Dunno when Qt 4 is scheduled for though.  I
> wonder if BlackAdder will carry on with roughly similar price and
> licensing with Qt 4?

Qt 4 is scheduled for the end of Q2. The plan is that PyQt will follow "fairly 
soon" after, but there will be a number of releases with classes being added 
at each release. It will be some afterwards that the support matches that of 
Qt 3.

> Also, somebody outside Trolltech was also doing a port of Qt 3 GPL to
> Windows which apparently got quite a long way.  Whether that effort
> continues, and whether PyQt will support that 'unofficial' port, I
> don't know (not sure TT are hugely happy about the port, so perhaps
> PyQt's author - Phil Thompson - respecting the people at TT as I'm
> sure he does, won't support it).

With something like that you adopt a "wait and see" attitude to see if it 
gains any momentum.

> Poor old Phil Thompson is fated to answer the same licensing questions
> forever, though - an activity I suspect he dislikes even more than GUI
> application programming <wink>

But at least it means I can stop adding the phrase "but it depends of which 
platform you are using" to every sentence I utter.

Phil


From kirk at jobsluder.net  Sun Apr 24 13:58:33 2005
From: kirk at jobsluder.net (Kirk Job Sluder)
Date: Sun, 24 Apr 2005 17:58:33 GMT
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b0d03_3@newspeer2.tds.net> <426B1300.6090802@cloudthunder.com>
	<d4f4ps$7cu$1@sea.gmane.org> <426B1A6F.2060401@cloudthunder.com>
	<d4f9n1$fah$1@sea.gmane.org>
	<mailman.2381.1114320663.1799.python-list@python.org>
Message-ID: <87pswk5a4b.fsf@debian.kirkjobsluder.is-a-geek.net>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:

> Unfortunately that's not much of an option for me. We are working on a
> project together so I am forced to either prove his notion incorrect
> or I give in to his conception. *throws hands in air*

Well, one option is to give in to his conception and point out that if
you are working in python, foo=5 is neither a true constant or a
variable.  foo is an object reference pointing to an anonymous object
with the value 5.

Another way around it is to point out that while the use of the term
"variable" in this sense may not be technically correct in terms of
maths, it is the accepted jargon in the python community.  Other
programming communities may use different terms to describe values that
change and values that don't change.

A third way around this is to use this to your advantage and point out
that python does not have a mechanism for distinguishing varibles from
constants, so settle on some syntactic sugar to make the differences
clear in your code.  

-- 
Kirk Job-Sluder
"The square-jawed homunculi of Tommy Hilfinger ads make every day an
existential holocaust."  --Scary Go Round


From jepler at unpythonic.net  Thu Apr 14 10:57:40 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 14 Apr 2005 09:57:40 -0500
Subject: Get the entire file in a variable - error
In-Reply-To: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
References: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
Message-ID: <20050414145737.GA28178@unpythonic.net>

It's not clear to me what you mean by "the first line" (gzip does not
output a file composed of lines, its output is byte-oriented).

Printing tst.getvalue() is probably not a very useful thing to do, since
it won't do anything useful when the output is a terminal, and it will
add an extra newline if you are redirecting to a file.

At least when close()ing the GzipFile before looking at the StringIO
instance's value, I get some bytes that gunzip just fine, giving the
original string.

Here's my interactive session:
>>> import gzip
>>> import StringIO
>>> io = StringIO.StringIO()
>>> z = gzip.GzipFile("test.gz", "w", 5, io)
>>> z.write("""\
... Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
... [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
... Type "help", "copyright", "credits" or "license" for more information.
... """)
>>> z.close()
>>> from os import popen
>>> popen("gunzip -dc", "w").write(io.getvalue())
Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

I don't know anything about your database or its "LONG field".
Depending on the database software there could be additional problems
with embedded NULs, for instance.

Jeff
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From ivanlan at pauahtun.org  Mon Apr 25 10:03:37 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Mon, 25 Apr 2005 08:03:37 -0600
Subject: Multiple tuples for one for statement
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
	<200504251356.07715.james@wrong.nu> <426CF1D5.E9F4396@pauahtun.org>
	<200504251457.28724.james@wrong.nu>
Message-ID: <426CF8B9.7335BE65@pauahtun.org>

Hi All--

"R. C. James Harlow" wrote:
> 
> On Monday 25 April 2005 14:34, Ivan Van Laningham wrote:
> > Hi All--
> >
> > "R. C. James Harlow" wrote:
> > > or just:
> > >
> > > for a,b,c in (tup1, tup2, tup3):
> > >     print a
> > >     print b
> > >     print c
> >
> > And this works in Python version???
> 
> Ah, reading the replies to the original post, this works but doesn't give the
> result that the original poster wanted.
> 

Define "works":

a=(1,2,3,4,9,43,256,8,2021)
b=(1,0,3,4,7,999,256,8,2023)
c=(1,7,8,4,9,43,4444,8,2028)

for x,y,z in (a,b,c):
    print x,y,z


12 [/c/CDListings][8] python fneeg.py
Traceback (most recent call last):
  File "fneeg.py", line 8, in ?
    for x,y,z in a,b,c:
ValueError: too many values to unpack



PyVersion:

Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From alexk at mailinator.com  Thu Apr 28 13:02:30 2005
From: alexk at mailinator.com (alexk)
Date: 28 Apr 2005 10:02:30 -0700
Subject: split question
Message-ID: <1114707749.969274.293560@l41g2000cwc.googlegroups.com>

I've a simple question. Why the following:

words = "123#@$#$@^%[wordA] wordB#@$".split('~`!@#$%^&*()_+-=[]{},./')

doesn't work? The length of the result vector is 1.

I'm using ActivePython 2.4

Alex



From ville at spammers.com  Fri Apr 22 05:06:47 2005
From: ville at spammers.com (Ville Vainio)
Date: 22 Apr 2005 12:06:47 +0300
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi>
Message-ID: <du7sm1j6uzc.fsf@mozart.cc.tut.fi>

>>>>> "Ilpo" == Ilpo Nyyss?nen <iny> writes:

    Ilpo> James Stroud <jstroud at mbi.ucla.edu> writes:

    >> Is it relevant that Python can produce compiled expressions? I
    >> don't think that there is such a thing with Perl.

    Ilpo> The problem in python here is that it needs to always
    Ilpo> recompile the regexp. I would like to have a way to write a
    Ilpo> regexp as a constant and then python should compile that
    Ilpo> regexp to the byte-code file.

    Ilpo> This is a problem when one has a big amount of regexps. One
    Ilpo> example is the xmlproc parser in PyXML,

Read the source for sre.py, esp. _compile. The compiled regexps are
cached, so when you invoke e.g. re.match(), it doesn't recompile the
regexp.

So this point is moot, and perl's approach is excessive special
casing.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From mefjr75 at hotmail.com  Sat Apr 30 00:27:18 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 29 Apr 2005 21:27:18 -0700
Subject: Micro-PEP: str.translate(None) to mean identity translation
In-Reply-To: <4272e00c.260731842@news.oz.net>
References: <4272e00c.260731842@news.oz.net>
Message-ID: <1114835238.762478.236940@o13g2000cwo.googlegroups.com>

Bengt Richter wrote:
> Just thought None as the first argument would be both handy and
mnemonic,
> signifying no translation, but allowing easy expression of deleting
characters,
> e.g.,
>
>    s = s.translate(None, 'badcharshere')
>
> Regards,
> Bengt Richter

What's wrong with :

s = s.replace('badchars', "")

It seems obvious to replace a char ( to me anyway ) with a blank
string, rather than to 'translate' it to None.
I am sure you have a reason what am I missing ?
M.E.Farmer



From ivoras at _-_fer.hr  Fri Apr 29 13:45:54 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Fri, 29 Apr 2005 19:45:54 +0200
Subject: Reusing object methods?
Message-ID: <d4trsp$jsl$1@bagan.srce.hr>


Can this be done: (this example doesn't work)

----
class A:

     def a_lengthy_method(self, params):
          # do some work depending only on data in self and params

class B:

     def __init__(self):
         self.a_lengthy_method = A.a_lengthy_method
         # I know that data in "self" of class B object is compatible
         # with that of class A object
----

I want to 'reuse' the same method from class A in class B, and without 
introducing a common ancestor for both of them - is this possible in an 
elegant, straightforward way?



From simon.brunning at gmail.com  Fri Apr 22 10:42:48 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 22 Apr 2005 15:42:48 +0100
Subject: Jython - how much python is it supporting?
In-Reply-To: <1114180559.089934.192220@l41g2000cwc.googlegroups.com>
References: <1114180559.089934.192220@l41g2000cwc.googlegroups.com>
Message-ID: <8c7f10c60504220742b1d38b8@mail.gmail.com>

On 22 Apr 2005 07:35:59 -0700, codecraig <codecraig at gmail.com> wrote:
> Any ideas on what Jython does and does not support?  And, any idea how
> I can tell someone about xmlrpclib?

Jython supports pure python (i.e.no C extensions) as at Python 2.1,
more or less.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From pitonero at gmail.com  Sun Apr  3 04:11:22 2005
From: pitonero at gmail.com (El Pitonero)
Date: 3 Apr 2005 00:11:22 -0800
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424F8F0E.2010701@v.loewis.de>
Message-ID: <1112515882.128422.254400@l41g2000cwc.googlegroups.com>

Martin v. L?wis wrote:
> Ron_Adam wrote:
> >
> > No, I did not know that you could pass multiple sets of arguments
to
> > nested defined functions in that manner.
>
> Please read the statements carefully, and try to understand the
mental
> model behind them. He did not say that you can pass around multiple
> sets of arguments. He said that functions (not function calls, but
> the functions themselves) are objects just like numbers. There is
> a way of "truly" understanding this notion, and I would encourage
> you to try doing so.

I have the same feeling as Martin and Bengt. That is, Ron you are still
not getting the correct picture. The fact that you have three-level
nested definition of functions is almost incidental: that's not the
important part (despite the nested scope variables.) The important part
is that you have to understand functions are objects.

Perhaps this will make you think a bit more:

x=1

if x==1:
    def f(): return 'Hello'
else:
    def f(): return 'Bye'

for x in range(3):
    def f(x=x):
        return x

Do you realize that I have introduced 5 function objects in the above
code? Do you realize that function objects could be created *anywhere*
you can write a Python statement? Whether it's inside another function,
or inside a if...else... statement, or inside a loop, doesn't matter.
Whereever you can write a Python statement, you can create a function
there. I don't know what your previous programming language is, but you
have to stop treating functions as "declarations". The "def" is an
executable statement.

Another example:

def f():
   return f

g = f()()()()()()()()()()()

is perfectly valid.



From ladasky at my-deja.com  Thu Apr 21 19:53:28 2005
From: ladasky at my-deja.com (ladasky at my-deja.com)
Date: 21 Apr 2005 16:53:28 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
Message-ID: <1114122554.228545.105700@g14g2000cwa.googlegroups.com>

I'm back...

Thanks to Michael Spencer and Steven Bethard for their excellent help.
It has taken me a few sessions of reading, and programming, and I've
had to pick up the exploded fragments of my skull from time to time.
But I now have succeeded in making deepcopy work for a simple class
that I wrote myself.  Unfortunately, I'm still getting errors when I
try to copy the object I really want.  This will be a long post
including code examples and tracebacks, so please bear with me.

First things first.  For days, I didn't realize or appreciate that
there is a difference between "class C:" and "class C(object):".
Making this one change, made the difference between working code and
incomprehensible exceptions being thrown by the interpreter.  Where can
I read a description of the 'object' class?  If subclassing 'object' is
necessary to make common functions like __new__ and deepcopy work out
of the box, why doesn't Chapter 9 of the Python tutorial discuss this?

Now, here's some working code, with minimal distractions from the main
point, which is the deepcopy process:

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

from copy import deepcopy
from random import randint
requiredItems = ["a", "b", "c"]

class Test(object):

    def __init__(self, items = {}):
        self.addedItems = []
        for key in items:
            if not hasattr(self, key):
                setattr(self, key, items[key])
                if key not in requiredItems:
                    self.addedItems.append(key)
        for var in requiredItems:
            if not hasattr(self, var):
                setattr(self, var, randint(1,5))

    def contents(self):
        items = {}
        for key in (requiredItems + self.addedItems):
            items[key] = getattr(self, key)
        return items

    def __deepcopy__(self, memo={}):
        newTestObj = Test.__new__(Test)
        memo[id(self)] = newTestObj
        newTestObj.__init__(deepcopy(self.contents(), memo))
        return newTestObj

    def show(self):
        report = ""
        for x in (requiredItems + self.addedItems):
            report=report+"  "+str(x)+" = "+str(getattr(self,x))
        return report

foo = Test()
bar = Test({"c":10})
snafu = Test({"c":20, "d":30})
print "foo:", foo.show()
print "bar:", bar.show()
print "snafu:", snafu.show()
clone = deepcopy(foo)
print "clone, should be deepcopy of foo:", clone.show()
clone.b = 40
print "clone, should be changed:", clone.show()
print "foo, should NOT change:", foo.show()

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

Here's a sample output from the above program:

> foo:    a = 2   b = 5   c = 2
> bar:    a = 3   b = 1   c = 10
> snafu:    a = 2   b = 2   c = 20   d = 30
> clone, should be deepcopy of foo:    a = 2   b = 5   c = 2
> clone, should be changed:    a = 2   b = 40   c = 2
> foo, should NOT change:    a = 2   b = 5   c = 2
> Exit code: 0

You can see that I'm playing with the extension of the objects by
passing dictionaries containing novel attributes.  You can ignore that,
though doing so was in fact my stepping stone to the useful 'contents'
method.  I've come to appreciate that there are several ways to pass
attributes between objects.  I like this dictionary approach, because
it explicitly passes the names of the attributes along with their
values.

It took me a while to figure out this expression...

newTestObj = Test.__new__(Test)

That's interesting, and also a bit scary.  It suggests that you can ask
the Test object/class to create a new object of some class *other than
Test*!  Is this because '__new__' is actually a method of the 'object'
class, and not of 'Test'?  Or are there some strange games to be played
here?  (What the heck are metaclasses?  Are they relevant here?  Do I
*really* want to know?)

Anyway, this test program works fine when the attributes that I want to
copy are numeric objects, lists or strings.  But the real object that I
want to copy also contains *arrays* as attributes.  When I change the
program thus...

Near the top with the other import statements, add:
from array import array
from random import random

Change the last line of __init__ to read:
setattr(self, var, array("d", [random() for x in range(3)]))

... I am provoking an exception from deep within Python's guts.  New
instances are created fine, but they aren't getting deepcopied:

> foo:    a = array('d', [0.52605955021044, 0.48584632687459, etc.
> bar:    a = array('d', [0.91072903604066, 0.63424430516644, etc.
> snafu:  a = array('d', [0.63255804677449, 0.67492348886257, etc.
>
> Traceback (most recent call last):
>   File "deepcopy experiment.py", line 66, in ?
>     clone = deepcopy(foo)
>   File "C:\Program Files\Python2_3\lib\copy.py", line 190,
>   in deepcopy
>     y = copier(memo)
>   File "deepcopy experiment.py", line 43, in __deepcopy__
>     newTestObj.__init__(deepcopy(self.contents(), memo))
>   File "C:\Program Files\Python2_3\lib\copy.py", line 179,
>   in deepcopy
>     y = copier(x, memo)
>   File "C:\Program Files\Python2_3\lib\copy.py", line 270,
>   in _deepcopy_dict
>     y[deepcopy(key, memo)] = deepcopy(value, memo)
>   File "C:\Program Files\Python2_3\lib\copy.py", line 206,
>   in deepcopy
>     y = _reconstruct(x, rv, 1, memo)
>   File "C:\Program Files\Python2_3\lib\copy.py", line 338,
>   in _reconstruct
>     y = callable(*args)
>   File "C:\Program Files\Python2_3\lib\copy_reg.py", line 92,
>   in __newobj__
>     return cls.__new__(cls, *args)
> TypeError: array() takes at least 1 argument (0 given)
> Exit code: 1

I have also tried this with an object with mixed attributes, which are
bundled into a dictionary with numerics first, and then an array (code
not shown).  In this case, deepcopy works fine on the numerics, and
does not throw the TypeError until the array is reached.

Does the array class not implement deepcopy correctly?  Is this a
language bug, or do I need to do something extra with arrays?  Maybe I
should just tolerate the overhead, junk the arrays, and revert to using
lists?

I'm SO close to having this work -- awaiting your sage advice once
again...

--
Rainforest laid low.
"Wake up and smell the ozone,"
Says man with chainsaw.
John J. Ladasky Jr., Ph.D.



From pyguy2 at gmail.com  Fri Apr 22 12:55:13 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 22 Apr 2005 09:55:13 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <42691bbe.241769556@news.oz.net>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
Message-ID: <1114188913.806103.120830@f14g2000cwb.googlegroups.com>

>This change is NOT a good idea!!
I agree the .pyw shortcut method is better. However, if you are willing
to lose
stdin,stdout,stderr and really never want a console window to pop up, I
do not see how it is a disasterous change. You can still run python.exe
on your py files when you want  to test your code.

>What do you mean by "their command prompt"? The actual prompt of
cmd.exe
>or the command line interpretation? I agree the latter sucks, but I
could
>change the shell if I wanted to go to the trouble.
Of course, but one cannot always change it  on boxes you have to deal
with.  Probably in an effort to not compete with themselves, there are
some basic  things a multi-hundred dollar operating system doesn't give
you. Like, oh, a simple editor that has multiple levels of undue and
redo.

>Actually, I don't really like os system info mixed in with application
>info, which is what #!

I think of it like the ''.join semantics. The object knows best how to
handle join (even if it looks wierd to some people). In the #! case,
the program knows best how to start itself.



From fredrik at pythonware.com  Mon Apr 11 09:17:44 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 15:17:44 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de><mailman.1647.1113160640.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de><d3c88t$r27$1@sea.gmane.org>	<d3d0l5$8s1$1@sea.gmane.org><d3d7ft$ljg$1@sea.gmane.org>
	<d3dcn8$3i9$1@sea.gmane.org>
Message-ID: <d3dt89$s52$1@sea.gmane.org>

Robert Kern wrote:

> Agreed, which is why I think that proper package management and a CPyAN-type system is the way to 
> go, not trying to stuff everything into a single distribution.

I think we're looking at this in two different ways: you're looking at it from the "sumo
python distribution" perspective, I'm trying to find a middle ground between a sumo
distribution and today's put-it-in-our-repository-or-else approach.

(I have more comments to your comments, but they have to wait until later)

</F> 





From Ron2005_010 at yahoo.com  Wed Apr  6 07:06:27 2005
From: Ron2005_010 at yahoo.com (Ron2005_010 at yahoo.com)
Date: 6 Apr 2005 04:06:27 -0700
Subject: THE GREATEST NEWS EVER !
Message-ID: <1112785587.559201.85570@g14g2000cwa.googlegroups.com>

 
http://www.print-it.blogspot.com << The Greatest News Ever!



From pete at osc.edu  Tue Apr 19 10:27:16 2005
From: pete at osc.edu (Peter G Carswell)
Date: Tue, 19 Apr 2005 10:27:16 -0400
Subject: New to Tkinter...
In-Reply-To: <opsphfvgo7rqur0o@eb.pragmadev>
References: <d431e1$9ee$1@malgudi.oar.net> <opsphfvgo7rqur0o@eb.pragmadev>
Message-ID: <42651544.3020108@osc.edu>

Eric Brunel wrote:

> This is not an error. It's just the value of the _test function in the 
> Tkinter module. You don't give the URL where you found the 
> installation/test instructions, but you probably want:
>
> Tkinter._test()
>
> which *calls* the function. Tkinter._test just returns its value 
> (functions are first class objects in Python...)  

I did get a positive result on my linux desktop. However, on my laptop 
Fedora Core 1,  the Tk window shell popped up with no buttons:

Python 2.2.3 (#1, Oct 15 2003, 23:33:35)
[GCC 3.3.1 20030930 (Red Hat Linux 3.3.1-6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import _tkinter
 >>> import Tkinter
 >>> Tkinter._test()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.2/lib-tk/Tkinter.py", line 3118, in _test
    label = Label(root, text=text)
  File "/usr/lib/python2.2/lib-tk/Tkinter.py", line 2285, in __init__
    Widget.__init__(self, master, 'label', cnf, kw)
  File "/usr/lib/python2.2/lib-tk/Tkinter.py", line 1780, in __init__
    self.tk.call(
SystemError: Py_UNICODE and Tcl_UniChar differ in size
 >>>

pete

-- 
Peter G. Carswell   
The Ohio Supercomputer Center
pete at osc.edu
work: 614.292.1091  
fax:  614.292.XXXX
"DOC NOTE, I DISSENT. A FAST NEVER PREVENTS A FATNESS. I DIET ON COD."
-Peter Hilton



From fredrik at pythonware.com  Sat Apr 23 12:39:06 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 23 Apr 2005 18:39:06 +0200
Subject: Trouble Installing TTX/FontTools (asks for .NET
	FrameworkPackages)
References: <1113874162.678930.249700@g14g2000cwa.googlegroups.com><1113895106.385196.310650@g14g2000cwa.googlegroups.com>
	<1114271628.513013.158090@l41g2000cwc.googlegroups.com>
Message-ID: <d4dtdn$kii$1@sea.gmane.org>

Jesper Olsen wrote:

> > Apparently setup.py tries to compile a c file, which of course
> doesn't
> > work if there's no compiler.
>
> In fact it does not work even if there is a compiler - seems distutils
> has been broken in python2.4 (it works in python2.3).

distutils works just fine in 2.4.

but the standard Windows distribution of Python 2.4 is compiled with
a newer compiler.  if you don't have a compatible compiler on your
machine (or if the compiler isn't properly installed), setup won't be able
to build extensions for 2.4.

</F>





From programmer.py at gmail.com  Tue Apr 19 09:35:43 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Tue, 19 Apr 2005 08:35:43 -0500
Subject: modules and namespaces
In-Reply-To: <4265027C.2090104@mage.hu>
References: <4265027C.2090104@mage.hu>
Message-ID: <d52c72d205041906355be5cacc@mail.gmail.com>

Each module has its own "namespace", which is like a dictionary of
objects that the module can "see".  I use the term dicitionary because
locals() and globals() both return dictionaries -- someone may correct
me on this (or confirm what I say)...

You have local and global variables.

Locals are variables in the scope of a function.

def myfun():
    localvar = 1

`globals' are really 'module' global only.

# mymodule
global_var = 3

def myfun()
    print global_var

    # This is a *gotcha* -- you can't change global variables this way.
    # here, a new local variable global_var is initialized.
    global_var = 3

def changeglobal():
    # you have to use `global' to instruct python to use the `global'
instance of the variable
    # instead of creating a new one when you assign to it.
    global global_var 
    global_var = 3    

You can only see variables you've created or modules you've imported. 
Becase you haven't imported string in m2 or m3, you can't see them.

hth,
jw

On 4/19/05, Mage <mage at mage.hu> wrote:
>        Hello,
> 
> I thought that this will work:
> 
> #m1.py
> def f1():
>     return string.join('a','a')
> 
> #m2.py
> def f2():
>     return string.join('b','b')
> 
> #main.py
> import string
> import m1
> import m2
> 
> print f1()
> print f2()
> 
> ---------
> 
> However it doesn't work until I import the string module into m1 and m2
> modules. I found in the manual that imported modules will be searched in
> the container module first. Is it more efficient to import the string
> module into main and m1 and m2 than importing only into m1 and m2?
> 
>        Mage
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From rpmuller at gmail.com  Fri Apr  1 19:50:20 2005
From: rpmuller at gmail.com (RickMuller)
Date: 1 Apr 2005 16:50:20 -0800
Subject: Help with splitting
In-Reply-To: <pan.2005.04.01.23.20.58.627197@jerf.org>
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
	<d2kjtk$qda$1@eeyore.INS.cwru.edu>
	<pan.2005.04.01.23.20.58.627197@jerf.org>
Message-ID: <1112403020.933398.178130@o13g2000cwo.googlegroups.com>

Thanks to everyone who responded!! I guess I have to study my regular
expressions a little more closely.



From lee_merrill at yahoo.com  Thu Apr  7 14:32:01 2005
From: lee_merrill at yahoo.com (lee_merrill at yahoo.com)
Date: 7 Apr 2005 11:32:01 -0700
Subject: struct enhancements?
In-Reply-To: <us6dnXg8F42W0cjfRVn-gw@comcast.com>
References: <1112885184.815268.265560@l41g2000cwc.googlegroups.com>
	<us6dnXg8F42W0cjfRVn-gw@comcast.com>
Message-ID: <1112898721.584242.38530@o13g2000cwo.googlegroups.com>

Thanks! I have 16 zillion ... well 16,000 strings that need trimming.

Lee

Larry Bates wrote:
> Can't address the 8-byte longs, but to strip off null padding
> in strings you merely do
> 
> s=s.rstrip('\x00')
> 
> Larry Bates



From kent37 at tds.net  Fri Apr 22 08:26:02 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 08:26:02 -0400
Subject: time.strftime in 2.4.1 claims data out of range when not
In-Reply-To: <ja4ae.24814$Xm3.22734@trndny01>
References: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
	<ja4ae.24814$Xm3.22734@trndny01>
Message-ID: <4268e904$1_2@newspeer2.tds.net>

Raymond Hettinger wrote:
> Since the rules for handling missing, inconsistent, or out-of-range tuple fields
> are not defined, even that revision has some risk.  To future-proof the code,
> use strptime() to generate a well-formed time tuple:
> 
>>>>strptime('%d-%d-%d' % (y,m,d), '%Y-%m-%d')
> 
> (2005, 5, 15, 0, 0, 0, 6, 135, -1)
> 
>>>>strftime("%Y-%m-%d", _)
> 
> '2005-05-15'

or use datetime.date which only needs y, m, d:

  >>> from datetime import date
  >>> d=date(2005, 5, 15)
  >>> d.strftime("%Y-%m-%d")
'2005-05-15'

Kent


From steve at holdenweb.com  Wed Apr 13 22:12:12 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 22:12:12 -0400
Subject: Compute pi to base 12 using Python?
In-Reply-To: <6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>	<425cefae.268278123@news.oz.net>	<mailman.1825.1113388030.1799.python-list@python.org>	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
Message-ID: <d3kjb0$pk6$2@sea.gmane.org>

Dick Moores wrote:
> Dan wrote at 18:02 4/13/2005:
> 
>> On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
>> wrote:
>>
>> > I'm just trying to help an artist acquaintance who needs (I just
>> >learned) the first 3003 digits of pi to the base 12.
>>
>> Now you've got me curious.  Why would an artist want the first 3003
>> digits of pi to the base 12?
> 
> 
> He says,
> Do you know how I can get "base12 pi"?
> Because the chromatic scale is base12.
> c c# d d# e f f# g g# a a# b
> 
> Dick
> 
> 
So it's, like, the guy is going to "play pi"? So why does the melody 
have 3003 notes?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From roy at panix.com  Wed Apr 20 13:28:23 2005
From: roy at panix.com (Roy Smith)
Date: 20 Apr 2005 13:28:23 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
Message-ID: <d463fn$kd7$1@panix2.panix.com>

Terry Hancock wrote:
>> I used to make "off by one" errors all the time in both C and Fortran,
>> whereas I hardly ever make them in Python. 

Part of the reason may be that most loops over lists involve
iterators, where the details of the index limits are hidden.  In
Python, you write:

for item in myList:
    blah

but in C and Fortran you would write:

for (i = 0; i < MAXLIST; ++i) {
    blah;

      do 10 i = 1, MAXLIST
10    blah

both endpoints are mentioned explicitly.  C++/STL also uses iterators,
but the syntax is repulsive.


From jerf at jerf.org  Wed Apr 27 13:49:31 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 27 Apr 2005 13:49:31 -0400
Subject: How do I parse this ? regexp ?
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.04.27.17.49.30.308584@jerf.org>

On Wed, 27 Apr 2005 07:56:11 -0700, serpent17 at gmail.com wrote:

> Hello all,
> 
> I have this line of numbers:
> 
> 
> 04242005 18:20:42-0.000002, 271.1748608, [-4.119873046875,
> 3.4332275390625, 105.062255859375], [0.093780517578125, 0.041015625,
> -0.960662841796875], [0.01556396484375, 0.01220703125, 0.01068115234375]
> 
> 
> repeated several times in a text file and I would like each element to be
> part of a vector. how do I do this ? I am not very capable in using regexp
> as you can see.

I think, based on the responses you've gotten so far, that perhaps you
aren't being clear enough.

Some starter questions:

* Is that all on one line in your file?
* Are there ever variable numbers of the [] fields?
* What do you mean by "vectors"?

If the line format is stable (no variation in numbers), and especially if
that is all one line, given that you are not familiar with regexp I
wouldn't muck about with it. (For me, I'd still say it's borderline if I
would go with that.) Instead, follow along in the following and it'll
probably help, though as I don't precisely know what you're asking I can't
give a complete solution:

Python 2.3.5 (#1, Mar  3 2005, 17:32:12) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> x = "04242005 18:20:42-0.000002, 271.1748608, [-4.119873046875, 3.4332275390
625, 105.062255859375], [0.093780517578125, 0.041015625, -0.960662841796875], [0
.01556396484375, 0.01220703125, 0.01068115234375]"
>>> x.split(',', 2)
['04242005 18:20:42-0.000002', ' 271.1748608', ' [-4.119873046875, 3.43322753906
25, 105.062255859375], [0.093780517578125, 0.041015625, -0.960662841796875], [0.
01556396484375, 0.01220703125, 0.01068115234375]']
>>> splitted = x.split(',', 2)
>>> splitted[2]
' [-4.119873046875, 3.4332275390625, 105.062255859375], [0.093780517578125, 0.04
1015625, -0.960662841796875], [0.01556396484375, 0.01220703125, 0.01068115234375
]'
>>> import re
>>> safetyChecker = re.compile(r"^[-\[\]0-9,. ]*$")
>>> if safetyChecker.match(splitted[2]):
...     eval(splitted[2], {}, {})
... 
([-4.119873046875, 3.4332275390625, 105.062255859375], [0.093780517578125,
0.041015625, -0.960662841796875], [0.01556396484375, 0.01220703125,
0.01068115234375])
>>> splitted[0].split()
['04242005', '18:20:42-0.000002']
>>> splitted[0].split()[1].split('-')
['18:20:42', '0.000002']
>>> 


I'd like to STRONGLY EMPHASIZE that there is danger in using "eval" as it
is very dangerous if you can't trust the source; *any* python code will
be run. That is why I am extra paranoid and double-check that the
expression only has the characters listed in that simple regex in it.
(Anyone who can construct a malicious string out of those characters will
get my sincere admiration.) You may do as you please, of course, but I
believe it is not helpful to suggest security holes on comp.lang.python
:-) The coincidence of that part of your data, which is also the most
challenging to parse, exactly matching Python syntax is too much to pass
up.

This should give you some good ideas; if you post more detailed questions
we can probably be of more help.



From claudio.grondi at freenet.de  Sat Apr  2 19:52:24 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sun, 3 Apr 2005 00:52:24 -0000
Subject: (win32) speedfan api control
References: <Kln3e.13905$e06.7165@twister.socal.rr.com>
Message-ID: <3b8m2tF6enbpaU1@individual.net>

your script works ok on my W2K box :-).

It makes me curious if I can get also the
temperatures into Python script for
further processing as easy as the setting
of the checkbox is done? (I have not
much experience with this kind of
programming yet)
May I ask how did you get the
"TJvXPCheckbox" and the other
values necessary to access the program
GUI ? (as I can see, there is no source
code of SpeedFan available) ?

Claudio

"tlviewer" <tlviewer at yahoo.com> schrieb im Newsbeitrag
news:Kln3e.13905$e06.7165 at twister.socal.rr.com...
> hello,
>
> If you run the Mainboard monitor, speedfan, here is
> an ActivePython script to force automatic fan control.
> http://www.almico.com/speedfan.php
>
> It's a great example of how clean the WinApi interface is
> in ActivePython. The script sets focus to the checkbox of
> interest and toggles the checkbox. AFAIK, speedfan will only
> start without fan control, requiring the user to manually
> check the checkbox to turn it on.
>
> hope someone finds it useful,
> tlviewer
>
> #!/usr/bin/python
> # author: tlviewer at yahoo.com
> # date: April 1, 2005
> # description: turn on SpeedFan automatic fan speed
> # keywords: speedfan readings
> #import win32api as ap
>
> import win32gui as wi
> import win32ui as ui
> import win32con as wc
>
> # dialog class name
> cl = "TJvXPCheckbox"
>
> try:
> hWnd = wi.FindWindowEx( 0, 0, "TForm1", "SpeedFan 4.20")
> print hWnd
> hWnd = wi.FindWindowEx( hWnd, 0, "TPageControl", "")
> print hWnd
> hWnd = wi.FindWindowEx( hWnd, 0, "TTabSheet", "Readings")
> print hWnd
> hWnd = wi.FindWindowEx( hWnd, 0, cl, "Automatic fan speed")
>
> print hWnd
> res = wi.SetForegroundWindow(hWnd)
> res=wi.SendMessageTimeout(hWnd,wc.WM_LBUTTONDOWN,wc.MK_LBUTTON,0,2,75)
> res = wi.SendMessageTimeout( hWnd,wc.WM_LBUTTONUP, 0, 0, 2, 75 )
> print res
> except:
> pass
> #end code





From mwm at mired.org  Mon Apr 25 01:28:20 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 00:28:20 -0500
Subject: What's do list comprehensions do that generator expressions don't?
Message-ID: <86ll77pgqz.fsf@guru.mired.org>

Ok, we've added list comprehensions to the language, and seen that
they were good. We've added generator expressions to the language, and
seen that they were good as well.

I'm left a bit confused, though - when would I use a list comp instead
of a generator expression if I'm going to require 2.4 anyway?

   Thanks,
   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From roy at panix.com  Thu Apr 21 21:35:12 2005
From: roy at panix.com (Roy Smith)
Date: Thu, 21 Apr 2005 21:35:12 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<3cr2cnF6locm6U2@individual.net>
Message-ID: <roy-1ED3C5.21351221042005@reader1.panix.com>

In article <3cr2cnF6locm6U2 at individual.net>,
 Greg Ewing <greg at cosc.canterbury.ac.nz> wrote:

> Roy Smith wrote:
> 
> > What would actually be cool is if Python were to support the normal math 
> > notation for open or closed intervals.
>  >
> > foo = bar (1, 2)
> > foo = bar (1, 2]
> > foo = bar [1, 2)
> > foo = bar [1, 2]
> > 
> > That would certainly solve this particular problem, but the cost to the 
> > rest of the language syntax would be rather high :-)
> 
> Not to mention the sanity of everyone's editors when
> they try to do bracket matching!

I have no doubt that somebody could teach emacs python-mode to correctly 
match half-open interval brackets.


From ajikoe at gmail.com  Sun Apr 24 08:59:05 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 24 Apr 2005 05:59:05 -0700
Subject: thread lock object.
Message-ID: <1114347545.147038.265210@g14g2000cwa.googlegroups.com>

Hello,

I have multi thread program running together and each will increment
int i.

How can we make only one thread at a time be able to access and
increment i ?

Thanks in advance,

Sincerely Yours,
pujo



From radam2 at tampabay.rr.com  Fri Apr  1 12:47:30 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Fri, 01 Apr 2005 17:47:30 GMT
Subject: Ternary Operator in Python
References: <mailman.1172.1112340286.1799.python-list@python.org>
Message-ID: <9l1r41tes7n87d16ou3hibff02tkh9p1pj@4ax.com>

On Fri, 1 Apr 2005 08:24:42 +0100 (BST), praba kar
<prabapython at yahoo.co.in> wrote:

>Dear All,
>    I am new to Python.  I want to know how to
>work with ternary operator in Python.  I cannot
>find any ternary operator in Python.  So Kindly
>clear my doubt regarding this
>
>
>		
>__________________________________ 
>Yahoo! Messenger 
>Show us what our next emoticon should look like. Join the fun. 
>http://www.advision.webevents.yahoo.com/emoticontest


I've used boolean opperations to do it.

	result = (v == value) * first + (v != value) * second

Same as:

	if v == value: result = first else: result = second


Ron



From mrovner at propel.com  Tue Apr  5 14:25:43 2005
From: mrovner at propel.com (Mike Rovner)
Date: Tue, 05 Apr 2005 11:25:43 -0700
Subject: os.path query functions behavior incorrect?
In-Reply-To: <YNy4e.25743$k66.11680@trnddc03>
References: <YNy4e.25743$k66.11680@trnddc03>
Message-ID: <d2ul3k$66s$1@sea.gmane.org>

Beman Dawes wrote:
> So are these os.path functions specified and implemented incorrectly? Should 
> they instead throw exceptions for the above examples?

Works for me. (Win XP SP2, Py 2.4, only have c and d drives)

 >>> os.path.exists('d:\\')
True
 >>> os.path.exists('e:\\')
False
 >>> os.path.exists('a:\\')
False
 >>>



From m.barenco at gmail.com  Tue Apr 12 13:01:11 2005
From: m.barenco at gmail.com (martino)
Date: 12 Apr 2005 10:01:11 -0700
Subject: where is python.h? / NumPy installation
References: <1ba41a18.0504110617.3746a6d2@posting.google.com>
	<mailman.1712.1113250246.1799.python-list@python.org>
Message-ID: <1ba41a18.0504120901.78fb320f@posting.google.com>

> 
> It *should* be
> /System/Library/Frameworks/Python.framework/Versions/2.3/include/python2.3/Python.h
> 
> In the meantime, you can snag a pre-built Numeric from
> 
>    http://pythonmac.org/packages/

It was not there to start with and by trying to install xcode from
apple's developpers site, I ended up screwing the pre-installed
version of python. So, I reinstalled a new build of python (2.4.1)
found on python.org (which put the coveted Python.h at the right place
and also the IDE) and then the pre-built of Numeric you just
mentionned and it now seems to work, so thanks a lot for the tip.

The original problem must stem from my installing panther over jaguar
in my machine, something must have gone wrong then.

Thanks again

Martino


From gja at cc.usu.edu  Thu Apr  7 14:04:30 2005
From: gja at cc.usu.edu (Greg)
Date: 7 Apr 2005 11:04:30 -0700
Subject: Read 16 bit integer complex data
References: <1112887876.272539.277420@z14g2000cwz.googlegroups.com>
	<mailman.1490.1112890274.1799.python-list@python.org>
Message-ID: <1112897070.001472.225740@o13g2000cwo.googlegroups.com>

That worked, thanks a lot.
Greg



From peufeu at free.fr  Tue Apr 12 13:51:19 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 19:51:19 +0200
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<1113311618.838281.205380@l41g2000cwc.googlegroups.com>
	<op.so37qgvcqfv3if@localhost>
Message-ID: <op.so4rvtvcqfv3if@localhost>



> Thank You for your suggestions....I request you all to eloborate the
> Uses(In Practical) for systems administrator.Some of my questions
> regarding the same follows.

	What do you want to do ?

> 1)Can i build web applications in Python ? If so how. I am planning to
> build a web application for intranet use which deals with workflow of
> Internal office communication.

	Sure, you could use mod_python+apache2 or Zope, Skunkweb... there's a lot  
of options depending on what you need. I find it better than PHP because  
it'll raise exceptions when you do something funky. PHP's way of ignoring  
missing keys in arrays or silent type conversions is a double ended sword  
and can simplify code as well as giving hard to trace bugs.

> 2)Which is best opensource database to be used with Python ?

	I like postgresql a lot, and the psycopg adapter for python is great.

> 3)When i write a remote execution script in python is it required that
> python should be installed in remote system.

	Yes.

> 4)I heard about Perl/CGI and that CGI application done by python
> too.....Is CGI still valid when PHP has taken over the WebApplication
> Development, Dominating.

	CGI will be slow as it spawns an interpreter for each request. See  
mod_python.


From steven.bethard at gmail.com  Mon Apr 18 13:53:36 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 18 Apr 2005 11:53:36 -0600
Subject: Removing dictionary-keys not in a set?
In-Reply-To: <1113845978.855729.261280@z14g2000cwz.googlegroups.com>
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
	<d40n0m$s78$1@panix3.panix.com>
	<1113845978.855729.261280@z14g2000cwz.googlegroups.com>
Message-ID: <nYWdnTMtyqG9af7fRVn-hg@comcast.com>

Tim N. van der Leeuw wrote:
> In my taste, using generator expressions with conditions actually
> doesn't look very readable; it hides the set-membership test under the
> syntactic clutter.

You might try different indentation.  I find that I write a lot of my 
list comprehensions and generator expressions like:

dict((k, v)
      for k, v in d.iteritems()
      if k in s)

It looks much more like the for-loop in my mind, and I can easily spot 
each of the for- and if-expressions in the genexp.

STeVe


From jsfrank.chen at msa.hinet.net  Sun Apr 10 21:58:08 2005
From: jsfrank.chen at msa.hinet.net (Thomas Moore)
Date: Mon, 11 Apr 2005 09:58:08 +0800
Subject: UselessPython 2.0
References: <Pokerface.1na1cc@no-mx.tacticalgamer.com>
	<1113149839.081297.10330@o13g2000cwo.googlegroups.com>
Message-ID: <002f01c53e39$ea35a790$2c8cfea9@Thomas>

I guess when useless, nothing cannot be done.

----- Original Message ----- 
From: <beliavsky at aol.com>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Monday, April 11, 2005 12:17 AM
Subject: Re: UselessPython 2.0


> Nice idea for a site, but I suggest renaming it to something like
> FunPython.com . My guess from reading the subject of your message was
> that you hated Python! Besides, "fun" is shorter than "useless" and is
> therefore more Pythonic :).
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


From eurleif at ecritters.biz  Tue Apr 26 05:46:00 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 26 Apr 2005 09:46:00 GMT
Subject: Order of elements in a dict
In-Reply-To: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <s5obe.2233$Cz3.303419@monger.newsread.com>

Marcio Rosa da Silva wrote:

> So, my question is: if I use keys() and values() it will give me the 
> keys and values in the same order?

It should work fine with the current implementation of dictionaries, but 
(AFAIK) it's not guaranteed to work by the mapping protocol. So 
theoretically, it could break under Python 2.5 or with a user-made 
mapping type.

> Also, if someone has a better way to exchange keys and values in a dict, 
> I would like to learn. :-)

I would do it like this:

 >>> d = {1: 2, 2: 3, 3: 4}
 >>> d = dict([(value, key) for key, value in d.iteritems()])
 >>> d
{2: 1, 3: 2, 4: 3}


From ivanlan at pauahtun.org  Thu Apr 21 14:17:48 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Thu, 21 Apr 2005 12:17:48 -0600
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com><mailman.2159.1113989175.1799.python-list@python.org><d45cun$ec3$1@news.tsystems.kiev.ua><mailman.2162.1113995666.1799.python-list@python.org><42664190.6010507@i.com.ua><mailman.2164.1113998230.1799.python-list@python.org><d45gap$elj$1@news.tsystems.kiev.ua><87vf6hlkix.fsf@wilson.rwth-aachen.de><d45kna$f1o$1@news.tsystems.kiev.ua><N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
	<42666097.3040405@i.com.ua><1114100669.807737.192320@l41g2000cwc.googlegroups.com>
	<d48la8$onm$1@news.tsystems.kiev.ua> <d48lb8$48a$1@sea.gmane.org>
Message-ID: <4267EE4C.47ACD0C8@pauahtun.org>

Hi All--

Fredrik Lundh wrote:
> 
> Maxim Kasimov wrote:
> 
> > how do use this here:
> 
> are you still claiming you're not a troll?
> 
> *plonk*
> 

Oh, I don't think he's a troll, but his license to use Python should be
revoked.  I think RPG would be a good language for him, don't you?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From fumanchu at amor.org  Mon Apr 18 17:06:08 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 18 Apr 2005 14:06:08 -0700
Subject: pre-PEP: Suite-Based Keywords
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E33987FC@exchange.hqamor.amorhq.net>

Reinhold Birkenfeld wrote:
> >y = (f(11, 22, x=1, y='y for f') *
> >     g(*args_from_somewhere,
> >       x='x for g', y='y for g',
> >       foo=lambda: return 'foo for g'))
> >
> >would be my current way to express this. But still, the less lines,
> >the less confusing it is.

And Ron Adam replied:
> I would probably do it this way.
> 
> y = f(11, 22, x=1, y='y for f') 		\
>          * g( *args_from_somewhere,
>               x='x for g', 
>               y='y for g',
>               foo=lambda: return 'foo for g' )

Which are both prettier, until you actually try to use them:

>>> g( *args_from_somewhere, x='x for g', y='y for g', foo=lambda:
return 'foo for g' )
Traceback (  File "<interactive input>", line 1
    g( *args_from_somewhere, x='x for g', y='y for g', foo=lambda:
return 'foo for g' )
                             ^
SyntaxError: invalid syntax


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From ajikoe at gmail.com  Sun Apr 24 05:11:12 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 24 Apr 2005 02:11:12 -0700
Subject: python sizeof ?
Message-ID: <1114333872.720156.255190@g14g2000cwa.googlegroups.com>

Hello,

How can I get the size of an object in python..?
analog with c sizeof?

Pujo



From news at NOwillmcguganSPAM.com  Fri Apr 22 18:15:32 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Fri, 22 Apr 2005 23:15:32 +0100
Subject: Python licence again
In-Reply-To: <FtCdneI1TKgS8vTfRVn-1w@powergate.ca>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com> <FtCdneI1TKgS8vTfRVn-1w@powergate.ca>
Message-ID: <42697785$0$2594$da0feed9@news.zen.co.uk>

Peter Hansen wrote:
> John J. Lee wrote:
> 
>> I will never pronounce thorough 'thurrow', though.  One must draw a
>> line.
> 
> 
> How *do* you pronounce it?  "Thurrow" seems to match
> how I say the word, along with everyone else I've
> ever met (until now?).

I would pronounce it like 'thurra', since I'm Scottish. It always makes 
me cringe when Americans pronounce 'Edinburgh' as 'edin-burrow' rather 
then 'edin-burra'.

I love how this newsgroup can digress so quickly.. ;)

Will McGugan
-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From Gerald.Klix at klix.ch  Thu Apr  7 08:28:30 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Thu, 07 Apr 2005 14:28:30 +0200
Subject: Python backend binding to PAM, NSS or pppd
In-Reply-To: <200504070644.32136.modelnine@ceosg.de>
References: <200504070644.32136.modelnine@ceosg.de>
Message-ID: <4255276E.1000003@klix.ch>

Hi Heiko, Hi all,
I have a PAM-library available that embedds Python.
Just tell me if you need it and I will publish it.

HTH,
Gerald

Heiko Wundram schrieb:
> Hey all!
> 
> Before I start hacking away, I'm looking for a Python backend binding for 
> libpam or libnss, or a python binding for the pppd plugin mechanism.
> 
> I'm trying to set up an SQL authentication scheme for virtual user accounts 
> used for mail and PPTP-VPN-access, and I'd love to do the authentication bit 
> in Python. And, yes, I know about pam-mysql and nss-mysql, but both projects 
> are old and unmaintained, and I use Oracle as backend DB anyway.
> 
> If anybody knows of any project which has implemented a part of this, I'd love 
> to hear about the effort...
> 
> 

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634




From Scott.Daniels at Acm.Org  Fri Apr 22 19:44:22 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 22 Apr 2005 16:44:22 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <mailman.2320.1114211454.1799.python-list@python.org>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>	<1114208333.622909.179640@l41g2000cwc.googlegroups.com>
	<mailman.2320.1114211454.1799.python-list@python.org>
Message-ID: <42698692$1@nntp0.pdx.net>

Terry Hancock wrote:
> On Friday 22 April 2005 05:18 pm, mehmetmutigozel at gmail.com wrote:
> 
> Perhaps you don't know how to call such functions?  E.g.:
> 
> a=[ lambda t: t**n for n in range(4) ]
> 
> 
>>>>a[2](3)
> 
> 27

Didn't you notice this was a funny value?
Maybe this example will show you what is going wrong:

 >>> a[0](3)
27
 >>> n = 10
 >>> a[3](2)
1024

See, the body of your anonymous function just looks for "the current
value of n" when it is _invoked_, not when it is _defined_.

Perhaps you mean:

      a = [lambda t, n=n: t**n for n in range(4)]

which captures the value of n as a default parameter at definition time.
In that case you get:

 >>> a = [lambda t, n=n: t**n for n in range(4)]
 >>> a[0](1024)
1
 >>> a[1](512)
512
 >>> a[2](16)
256
 >>> a[3](4)
64

--Scott David Daniels
Scott.Daniels at Acm.Org




From hancock at anansispaceworks.com  Sat Apr 23 00:49:19 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 23:49:19 -0500
Subject: __init__.py question
In-Reply-To: <1114172352.208471.158410@o13g2000cwo.googlegroups.com>
References: <1114172352.208471.158410@o13g2000cwo.googlegroups.com>
Message-ID: <200504222349.19118.hancock@anansispaceworks.com>

On Friday 22 April 2005 07:19 am, codecraig wrote:
> Ok,  I have the following directory structure
> 
> C:\pycode
>    --> blah.py
>    --> mynewdir
>       --> __init__.py
>       --> abc.py
> 
> [[ C:\pycode\mynewdir\abc.py ]]
> 
> def doFoo():
>     print "hi"
> 
> def doBar():
>     print "bye"
> 
> [[ C:\pycode\mynewdir\__init__.py ]]
> 
> from mynewdir import *

This didn't work, did it?  There is no module
"mynewdir.py" nor a package "mynewdir" in
the "mynewdir" directory, and I don't think import
will search up to find the container.

I suspect you meant that __init__.py says:

from abc import *

> [[ C:\pycode\blah.py ]]
> 
> ????
> 
> what do i import in blah.py so that I can accesss, 
abc.doFoo() ?

Assuming the above, and that you want to access
it as you have written it, that would be:

from mynewdir import abc

Note that in order to use this form, you don't have
to have *anything* in mynewdir/__init__.py --- it can
be an empty file, as long as it exists.

You only need to use an import in __init__.py if you
want it to automatically run when you import the
package.

E.g. if you did:

import mynewdir

You could access your function as:

mynewdir.abc.doFoo

(which requires the import statement in __init__.py).

Cheers,
Terry


--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From davidf at sjsoft.com  Tue Apr 19 16:33:56 2005
From: davidf at sjsoft.com (David Fraser)
Date: Tue, 19 Apr 2005 22:33:56 +0200
Subject: poll: does name conventions in python matters?
In-Reply-To: <mailman.2132.1113941497.1799.python-list@python.org>
References: <mailman.2132.1113941497.1799.python-list@python.org>
Message-ID: <d43pvi$a8$1@ctb-nnrp2.saix.net>

vegetax wrote:
> in python it is common to see naming
> inconsistencies ,methods,modules,packages,classes with names in every
> posible style:
> thisisalongmethod
> ThisIsALongMethod
> thisIsALongMethod
> this_is_a_long_method
> and even This_Is_A_Long_Method
> All over the place,even within one module!
> 
> classic static languages dont really need naming conventions, on the other
> side dynamic languages must have it(in my opinion),since there is a lot of
> syntax variability and very short constructors, a clear example is what
> does this means?
> c = Required(2)
> is it a method which returns an object or is it a class constructor?
> this kind of situation greatly decrease readability.
> 
> whats your opinion on the matter?

If you really worry about it, why don't you capitalise your English? :-)

David


From maitj at vianet.ca  Tue Apr  5 10:43:35 2005
From: maitj at vianet.ca (Jeffrey Maitland)
Date: Tue, 5 Apr 2005 10:43:35 -0400
Subject: change extensions
In-Reply-To: <ouWdnSxD5IGTP8_fRVn-3A@powergate.ca>
Message-ID: <001a01c539ed$dfc550d0$d502a8c0@JEFF>

That approach works, but so does this one. 

import os, glob

input_file_list = glob.glob('*.txt')
for in_file in input_file_list:
    name = in_file.split('.')
    os.rename(in_file, str(name[0]) + '.' + 'text')) 

# I could have put the text extension with the period but if you use a
variable (string) for the extension then you can't

-----Original Message-----
From: python-list-bounces+maitj=vianet.ca at python.org
[mailto:python-list-bounces+maitj=vianet.ca at python.org] On Behalf Of
Peter Hansen
Sent: Tuesday, April 05, 2005 10:35 AM
To: python-list at python.org
Subject: Re: change extensions

Bob Then wrote:
> how can i change all files from one extension to another within a
direcory?

Using Jason Orendorff's path.py module:

# change all .py files in '.' to extension .new
from path import path

for f in path('.').files():
     if f.endswith('.py'):
         f.rename(f.splitext()[0] + '.new')



Don't try the above in a folder containing useful
Python files! ;-)

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





From ruach at chpc.utah.edu  Wed Apr 13 19:11:21 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Wed, 13 Apr 2005 17:11:21 -0600
Subject: Utah Python Users Group
In-Reply-To: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>
References: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>
Message-ID: <d3k8ur$2vi$1@vegh.ks.cc.utah.edu>

lugal wrote:
> Is anyone aware if there's a Utah-based Python User Group? If not, does
> any else from Utah have any interest in forming a Utah-based Python
> User Group?
> 
I'm in Utah, I don't know of any groups but I might be interested.

-Matthew


From irmen.NOSPAM at xs4all.nl  Tue Apr 26 21:49:42 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 27 Apr 2005 03:49:42 +0200
Subject: App suggestion please: blog / forum software in Python
In-Reply-To: <1114565576.866943.77420@g14g2000cwa.googlegroups.com>
References: <mailman.2547.1114553904.1799.python-list@python.org>
	<w2Abe.1320$Ne7.864@newssvr17.news.prodigy.com>
	<1114565576.866943.77420@g14g2000cwa.googlegroups.com>
Message-ID: <426eefb9$0$163$e4fe514c@news.xs4all.nl>

stewart.midwinter at gmail.com wrote:
> thanks Kartic.  I use Frog already at my office.  For this particular
> application, its design may not be appropriate, since each user gets
> her own blog space.  I'm actually after a community blog, where any one
> of the registered users can post an item, or discuss on a forum.

It doesn't help you now but something like this is being
considered for the next major version of Frog (2.x)...
It will take a while before it's done though, so in the
meantime you have to look for something else.

--Irmen


From claudio.grondi at freenet.de  Wed Apr  6 15:41:30 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 6 Apr 2005 19:41:30 -0000
Subject: Problem with access to shared memory(W2K) / ORIGINALLY (win32)
	speedfan api control
Message-ID: <3bilaqF6in0icU1@individual.net>

Background information:
---------------------------------
in order to monitor mainboard sensory data
as fan speeds, temperatures, applications
like SpeedFan http://www.almico.com/speedfan.php
or MBM http://mbm.livewiredev.com/
can be used.
Both of the mentioned apps expose data got
from the hardware in a shared memory area.

The goal to achieve:
---------------------------
is to supervise the motherboard sensory
data from within a Python script

The approach:
-------------------
access to the shared memory area
exposed by motherboard hardware
querying apps from Python script.

The problem:
-----------------
the below listed script code returns
always same values, what
leads to the conclusion, that something
is going wrong.

Can anyone help?

Thanks in advance

Claudio

The code
-------------
  I use is provided also here:
 http://www.codecomments.com/Python/message430495.html
 http://mail.python.org/pipermail/python-list/2005-March/271853.html
(the mmap part of it doesn't work at all)

from ctypes import *

class Buffer(Structure):
  # just to see if any useful data can be acquired
  _fields_ = [
    ("Data0", c_longlong)
   ,("Data1", c_longlong)
   ,("Data2", c_longlong)
   ,("Data3", c_longlong)
   ,("Data4", c_longlong)
   ,("Data5", c_longlong)
   ,("Data6", c_longlong)
   ,("Data7", c_longlong)
   ,("Data8", c_longlong)
   ,("Data9", c_longlong)
   ,("DataA", c_longlong)
   ,("DataB", c_longlong)
   ,("DataC", c_longlong)
   ,("DataD", c_longlong)
   ,("DataE", c_longlong)
   ,("DataF", c_longlong)
  ]

szName = c_char_p("SFSharedMemory_ALM")  # SpeedFan
szName = c_char_p("$M$B$M$5$S$D$")    # MBM
# szName = c_char_p("blabla")  # not existing shared memory

FILE_MAP_ALL_ACCESS  = 0xF001F
FALSE = 0

hMapObject = windll.kernel32.OpenFileMappingA(
   FILE_MAP_ALL_ACCESS
  ,FALSE
  ,szName
)
if (hMapObject == 0):
  print "Could not open file mapping object"
  raise WinError()

pBuf = windll.kernel32.MapViewOfFile(
     hMapObject
    ,FILE_MAP_ALL_ACCESS
    ,0
    ,0
    ,0
)

  if (pBuf == 0):
    print "Could not map view of file"
    raise WinError()
  else:
    print repr(pBuf)
    print repr(hMapObject)

    pBuf_str = cast(pBuf, c_char_p)
    print repr(pBuf_str.value)
    print repr(pBuf_str)

    pBuf_buf = cast(pBuf, Buffer)
    print
    print
    print repr(pBuf_buf)
    print
    print repr(pBuf_buf.Data0)
    print repr(pBuf_buf.Data1)
    print repr(pBuf_buf.Data2)
    print repr(pBuf_buf.Data3)
    print repr(pBuf_buf.Data4)
    print repr(pBuf_buf.Data5)
    print repr(pBuf_buf.Data6)
    print repr(pBuf_buf.Data7)
    print repr(pBuf_buf.Data8)
    print repr(pBuf_buf.Data9)
    print repr(pBuf_buf.DataA)
    print repr(pBuf_buf.DataB)
    print repr(pBuf_buf.DataC)
    print repr(pBuf_buf.DataD)
    print repr(pBuf_buf.DataE)
    print repr(pBuf_buf.DataF)
  #:if/else (pBuf == 0)

windll.kernel32.UnmapViewOfFile(pBuf)
windll.kernel32.CloseHandle(hMapObject)

The output
--------------
is always the same:

13107200
80
''
c_char_p('')


<__main__.Buffer object at 0x007E3570>

13107200L
0L
0L
0L
0L
0L
0L
0L
0L
0L
0L
0L
0L
0L
0L
0L





From Daniel.Cer at gmail.com  Mon Apr 18 03:02:15 2005
From: Daniel.Cer at gmail.com (Daniel Cer)
Date: Mon, 18 Apr 2005 01:02:15 -0600
Subject: Canceling/interrupting raw_input
In-Reply-To: <4263537D.9020606@gmail.com>
References: <2LG8e.12216$hu5.4874@tornado.texas.rr.com>
	<4263537D.9020606@gmail.com>
Message-ID: <42635B77.3040304@gmail.com>

Just a little bit of a follow up on this...

If you use win32api.TerminateProcess() instead of sys.exit(), everything 
works as it should on Windows. That is, there is no longer a need to hit 
'enter' one last time in order to get "inputLoop" to terminate.

So, modifying the sample code I posted earlier, the new Win32 specific 
code would be the following:

import thread
import time
import sys
import win32api

def inputLoop():
      while 1:
              input_string = raw_input("Type something: ")
              print "You entered: ", input_string

thread.start_new_thread(inputLoop, () )
time.sleep(3)
print "\nTime's up exiting...."
win32api.TerminateProcess(-1, 0)

-Dan

Daniel Cer wrote:
> For what it's worth, this looks like a Windows specific problem.
> 
> The code below seems to work as expected on a Linux box. That is, 
> everything terminates, including the "inputLoop", after sys.exit() is 
> called, without the user needing to press 'enter' one last time.
> 
> However, if I try to run the code on Windows XP, it exhibits the exact 
> same behavior you described.
> 
> #!/usr/bin/python
> 
> import thread
> import time
> import sys
> 
> def inputLoop():
>      while 1:
>              input_string = raw_input("Type something: ")
>              print "You entered: ", input_string
> 
> thread.start_new_thread(inputLoop, () )
> 
> time.sleep(15)
> 
> sys.exit()
> 
> -Dan
> 
> 
> J. W. McCall wrote:
> 
>> I'm working on a MUD server and I have a thread that gets keyboard 
>> input so that you can enter commands from the command line while it's 
>> in its main server loop.  Everything works fine except that if a 
>> player enters the 'shutdown' command, everything shuts down, but the 
>> input thread is still sitting waiting for enter to be pressed for 
>> raw_input.  After enter is pressed, it exits back to the command 
>> prompt as it should.
>>
>> I'm wondering if there's a way that I can make the thread stop waiting 
>> for input.  Even sys.exit() still leaves it waiting.  It's not a big 
>> deal, but it bugs me.
>>
>> Any ideas?  Should I be using something other than raw_input?  I'm on 
>> Windows2000 and running this from the DOS prompt.  I'm using Python 2.4.


From jrm at ccs.neu.edu  Fri Apr  1 12:48:04 2005
From: jrm at ccs.neu.edu (Joe Marshall)
Date: Fri, 01 Apr 2005 12:48:04 -0500
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<l-qdnS9Is-M_ZdHfRVn-vA@speakeasy.net>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
Message-ID: <acoil76z.fsf@ccs.neu.edu>

Jeremy Bowers <jerf at jerf.org> writes:

> On Thu, 31 Mar 2005 23:30:42 -0800, Erik Max Francis wrote:
>
>> Daniel Silva wrote:
>> 
>>> Shriram Krishnamurthi has just announced the following elsewhere; it might
>>> be of interest to c.l.s, c.l.f, and c.l.p:
>>> http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html
>> 
>> April Fool's Day again, eh?
>
> Yes and no. In the Python community, we're taking all of that pretty
> seriously. 

The Python community takes many things pretty seriously.  Whitespace
and Guido come to mind.



From dcrespo at gmail.com  Wed Apr 27 07:19:06 2005
From: dcrespo at gmail.com (dcrespo)
Date: 27 Apr 2005 04:19:06 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <116tf7lm0ivnl6c@corp.supernews.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
	<116tf7lm0ivnl6c@corp.supernews.com>
Message-ID: <1114600746.599172.163730@o13g2000cwo.googlegroups.com>

And what did you use for deploying either PyGTK and wxPython? In other
words, what were your workspace and logic of the development?

Thanks

Daniel



From ivanlan at pauahtun.org  Tue Apr  5 23:41:30 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 05 Apr 2005 21:41:30 -0600
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com>
Message-ID: <42535A6A.E343358C@pauahtun.org>

Hi All--

Aahz wrote:
>  Given the tension of the various
> requirements, I think that Python has broken "only one way" as little as
> possible, with the full intention of getting closer to its ideal when the
> time comes to break backward compatibility.
> 

I wrote my mayalib package under 1.3.0.  It still runs perfectly well. 
I will only have to rewrite parts of it when the string module goes
away.  Everything else works, and will continue to work for the
forseeable future.

That's actually less change than happened with C over the same time
period.  But there, the language didn't change, just the environment
around it--includes, libs, where things lived, etc.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From dbasch at yahoo.com  Fri Apr  8 17:03:06 2005
From: dbasch at yahoo.com (Derek Basch)
Date: 8 Apr 2005 14:03:06 -0700
Subject: Counting iterations
Message-ID: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>

Is there a better way to count iterations that this?:

pets = 0
for i in pets:
    pets += 1
    print "pet" + "#" + pets

Thanks,
Derek Basch



From fredrik at pythonware.com  Fri Apr  8 05:27:59 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 11:27:59 +0200
Subject: __builtins__ wreidness
References: <42563515.8080401@geochemsource.com>
Message-ID: <d35imf$qcb$1@sea.gmane.org>

Laszlo Zsolt Nagy wrote:

> Given this module "test.py":
>
> print type(__builtins__)
>
> I ran into a wreid thing.
>
> Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> __builtins__
> <module '__builtin__' (built-in)>
> >>> type(__builtins__)
> <type 'module'>
> >>> import test
> <type 'dict'>
> >>>
>
> What? __builtins__ is a dict when used in a module, but it is a module when used interactively? 
> Why?

__builtins__ (plural form) is a CPython implementation detail.

if you want to access the __builtin__ module, import it as usual:

    import __builtin__
    f = __builtin__.open(...)

if you're interested in CPython implementation details, study the CPython
source code.

</F> 





From max2 at fisso.casa  Tue Apr  5 13:30:48 2005
From: max2 at fisso.casa (max(01)*)
Date: Tue, 05 Apr 2005 17:30:48 GMT
Subject: instance name
In-Reply-To: <99z3e.1157607$35.42889387@news4.tin.it>
References: <99z3e.1157607$35.42889387@news4.tin.it>
Message-ID: <cXz4e.739675$b5.33332285@news3.tin.it>

many many thanks to each and everyone who bothered to answer my op.

best regards

macs


From viznut at charter.net  Sat Apr 23 10:08:14 2005
From: viznut at charter.net (Randall Hopper)
Date: Sat, 23 Apr 2005 09:08:14 -0500
Subject: Python callbacks & PyGILState_Release()
In-Reply-To: <vf6dadh3.fsf@python.net>
References: <mailman.2334.1114226424.1799.python-list@python.org>
	<vf6dadh3.fsf@python.net>
Message-ID: <20050423140814.GA11452@charter.net>

Thomas Heller:
 |>      Python -> C++ -> Python Callback
 |>
 |> (example attached) an exception raised in the callback doesn't make it back
 |> across C++ to Python.
...
 |> void callback_wrapper( void *user_data )
 |> {
 |>   // Acquire interpreter lock
 |>   PyGILState_STATE gstate = PyGILState_Ensure();
 |>   ...
 |>   // Call Python
 |>   pyresult = PyEval_CallObject( pyfunc, pyargs );
 |>   ...
 |
 |    if (pyresult == NULL)
 |        PyErr_Print();
 |
 |>   // Free interpreter lock
 |>   PyGILState_Release(gstate);
 |> }
 |
 |PyErr_Print() will do the 'right' thing?s.

Thanks for the reply.  However, this won't:

   a) Stop the main Python script, and
   b) Print the full stack trace (including Python and C++ SWIG wrapper)

Is there a clean way to save the full exception state in the callback
before the PyGILState_Release(), and restore it when we return across the
C++ wrapper?

If I knew what the proper "save" and "restore" exception state code bits
were, I could easily implement this with exception typemaps in SWIG.

Thanks,

Randall

P.S. Perhaps PyGILState_Release should take an argument instructing it to
exclude exception state when resetting the interpreter state back to its
original state.


From sjmachin at lexicon.net  Thu Apr 21 17:37:49 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 22 Apr 2005 07:37:49 +1000
Subject: Python Win32 Extensions and Excel 2003. OL 11.0 Supported?
References: <1114012496.533936.297580@l41g2000cwc.googlegroups.com>
	<mailman.2187.1114016871.1799.python-list@python.org>
	<1iid61lqtl5u2hek2c7khnho9uinhgo4ie@4ax.com>
	<1114100032.073223.296270@o13g2000cwo.googlegroups.com>
Message-ID: <hs6g615rpp8e7573pqk4kvmrq4kkvolm1g@4ax.com>

On 21 Apr 2005 09:13:52 -0700, "Mudcat" <mnations at gmail.com> wrote:

>
>Anyone else have to package builds of com applications that need to be
>supported on different versions of Office? A few tips on how to make
>that run smoother would be some sweet info.

You'll probably do better if you ask the pywin32-specific mailing
list.

python-win32 at python.org

In fact, if you're so heavily into COM, you should consider
subscribing to the list.

Cheers,
John



From richard.eibrand at propylon.com  Fri Apr 15 10:20:24 2005
From: richard.eibrand at propylon.com (Richard Eibrand)
Date: Fri, 15 Apr 2005 15:20:24 +0100
Subject: http status response
Message-ID: <opso914aocwi1utj@replicant>

Hi guys,

How do I go about getting the http response status as with the httplib  
method <connection_handle>.getresponse() using urllib2?

Thing is I need to authenticate with a server, which I can do with urllib2  
(by passing credentials), but I also need to get the status response codes  
and not only when raised as an exception.

Any ideas? I've gone google blind at this stage - as I'm not able to find  
anything useful.

tia,

R

-- 
Richard Eibrand
Phone: +353 1 492 7444
Mobile: +353 86 388 8887
www.propylon.com


From martin at v.loewis.de  Thu Apr 28 00:33:35 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 28 Apr 2005 06:33:35 +0200
Subject: bytecode non-backcompatibility
In-Reply-To: <d4p4hn$rea$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org> <426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
	<426fdea1$0$31536$9b622d9e@news.freenet.de>
	<d4p4hn$rea$1@domitilla.aioe.org>
Message-ID: <427067a2$0$27765$9b622d9e@news.freenet.de>

Maurice LING wrote:
> I've emailed to catelog-sig mailing list and is still waiting to hear
> something. Currently, I have no idea of the structure of PyPI. I hope I
> can hear from them soon and generate some starting points...

Posting questions is not the only way to find answers. The source code
of PyPI is available: sf.net/projects/pypi.

Regards,
Martin


From godoy at ieee.org  Wed Apr 27 11:01:53 2005
From: godoy at ieee.org (Jorge Godoy)
Date: 27 Apr 2005 12:01:53 -0300
Subject: How do I parse this ? regexp ?
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
Message-ID: <87mzrkxnz2.fsf@jupiter.g2ctech>

"serpent17 at gmail.com" <serpent17 at gmail.com> writes:

> Hello all,
> 
> I have this line of numbers:
> 
> 
> 04242005 18:20:42-0.000002, 271.1748608, [-4.119873046875,
> 3.4332275390625, 105.062255859375], [0.093780517578125, 0.041015625,
> -0.960662841796875], [0.01556396484375, 0.01220703125,
> 0.01068115234375]
> 
> 
> repeated several times in a text file and I would like each element to
> be part of a vector. how do I do this ? I am not very capable in using
> regexp as you can see. 

You don't need a regexp to do that.

Use the split string method.  It will split on spaces by default.  If you want
to keep the values inside "[]" together, remove the spaces before splitting or
split on the "[" char first and then split the first item using spaces as a
separator. 


Be seeing you,
-- 
Jorge Godoy      <godoy at ieee.org>


From axel at straschil.com  Thu Apr  7 11:59:12 2005
From: axel at straschil.com (Axel Straschil)
Date: 07 Apr 2005 15:59:12 GMT
Subject: Multiple inheritance: Interface problem workaround,
	please comment this
Message-ID: <slrnd5am6f.7ed.axel@m2.sine>

Hello!

I'm working on an HTML/Cgi widget's class where multiple inheritance
well be sometime a great thing.

I solved all my problems for pythons multiple inheritance with this ng,
thaks to all again, but there is one think I still dislike:

class A(object):
	def __init__(self, a=None, **__eat): 
		print "A"
		super(A, self).__init__()
class B(object):

	def __init__(self, b=None, **__eat): 
		print "B"
		super(B, self).__init__()

class AB(A, B):
	def __init__(self, a=None, b=None): 
		super(AB, self).__init__(a=a, b=b)

ab = AB()

This looks (and I think is) correct, but I realy dislike the **__eat
stuff. As in python everything is virtual, I found no better solution to
do that. In my real world, i've got constucts like:
	class A(object)
	class B(A)
	class AB(A,B)
(not realy  so ugly like that ;-), just to say I can work only with super to 
call __init__).
 
My problem: If you make a coding mistake, and the mistake does not give
a runtime error becouse **__eat is a hungry evil beast, it would be very
hard to debug ... think of a wrong written parameter!

So, here is my workaround, please comment this, if someone has a better
solution I would be glad:

class A(object):
	def __init__(self, a=None, _do_eat=False, **__eat): 
		if __eat and not _do_eat: raise "I'm not hungry"
		print "A"
		super(A, self).__init__()

class B(object):
	def __init__(self, b=None, _do_eat=False, **__eat): 
		if __eat and not _do_eat: raise "I'm not hungry"
		print "B"
		super(B, self).__init__()

class AB(A, B):
	def __init__(self, a=None, b=None): 
		super(AB, self).__init__(a=a, b=b, _do_eat=True)

ab = AB()

Thanks, 
AXEL.
-- 
"Aber naja, ich bin eher der Forentyp." Wolfibolfi's outing in 
http://www.informatik-forum.at/showpost.php?p=206342&postcount=10


From mage at mage.hu  Wed Apr 13 11:52:33 2005
From: mage at mage.hu (Mage)
Date: Wed, 13 Apr 2005 17:52:33 +0200
Subject: database in python ?
In-Reply-To: <1113231173.277597.226710@g14g2000cwa.googlegroups.com>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>	<op.so2d8n2cqfv3if@localhost>
	<1113231173.277597.226710@g14g2000cwa.googlegroups.com>
Message-ID: <425D4041.5020904@mage.hu>

Andy Dustman wrote:

>
>Transactions available since 3.23.17 (June 2000)
>  
>
Transactions only supported on slow database types like innodb.

If you ever tried it you cannot say that mysql supports transactions. No.
Last time when I tried mysql 4.x did explicit commit if you simply
disconnected inside a transaction block. It was a year ago, but I will
never forget it.

>>foreign keys,
>>    
>>
>
>Foreign keys available since 3.23.44 (Oct 2001)
>  
>
They are syntactically accepted but not forced.

>
>>procedures,
>>    
>>
>
>Stored procedures available since 5.0 (5.0.3 is the current beta)
>  
>
It's a beta.

>
>Postgresql is also a fine database. But note that MySQLdb (the Python
>adapter) also has an equivalent mechanism for returning rows as
>dictionaries. As for speed: I don't do any benchmarking, but there
>should be no substantial speed differences between the two interfaces.
>
>  
>

I have seen real benchmarks. MySQL 5 is slower than postgresql and it's
also slower than firebird if you do some real work.

       Mage




From grante at visi.com  Mon Apr  4 22:54:41 2005
From: grante at visi.com (Grant Edwards)
Date: Tue, 05 Apr 2005 02:54:41 -0000
Subject: How to merge two binary files into one?
References: <mailman.1340.1112663541.1799.python-list@python.org>
	<1153pu8pvom6b02@corp.supernews.com>
	<mailman.1344.1112666821.1799.python-list@python.org>
Message-ID: <1153vfhid1vfif1@corp.supernews.com>

On 2005-04-05, could ildg <could.net at gmail.com> wrote:
>> > I want to merge file A and file B into a new file C, All of
>> > them are binary.
>> 
>> file('C','wb').write(file('A','rb').read()+file('B','rb').read())
>
> Python is really magic, even merge file can use "+".

You probably shouldn't use the above code for very large files,
since it reads files A and B entirely into memory before
writing the combined data to C.

For large files, something like this is probably a better idea:

fout = file('C','wb')
for n in ['A','B']:
    fin  = file(n,'rb')
    while True:
        data = fin.read(65536)
        if not data:
            break
        fout.write(data)
    fin.close()
fout.close()

-- 
Grant Edwards                   grante             Yow!  I feel like a wet
                                  at               parking meter on Darvon!
                               visi.com            


From le_cactus at msn.com  Sat Apr  9 06:44:12 2005
From: le_cactus at msn.com (Cactus)
Date: 9 Apr 2005 03:44:12 -0700
Subject: Declaring variables from a list
References: <1163d88e.0504081255.438fbb96@posting.google.com>
	<mailman.1576.1112994277.1799.python-list@python.org>
Message-ID: <1163d88e.0504090244.a69e2ec@posting.google.com>

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message news:<mailman.1576.1112994277.1799.python-list at python.org>...
> "Cactus" wrote:
> 
> > If I got a list is it possible to declare a variable from the items in that list?
> >
> > Code Sample:
> > Blob = ['Var1', 'Var2', 'vAR3']
> > i = 5
> > for listitems in Blob:
> >    i += 1
> >    listitems = i
> >
> > print Var1
> > 6
> > print Var2
> > 7
> > print vAR3
> > 8
> >
> 
> > Something like that? This doesn't work (obviously) but is there a way to do this?
> 
> why?
> 
> if you want a dictionary, use a dictionary (see the tutorial for details).
> 
> </F>

Thanks,

I'll look in to that. Seems like that will work....

Cacti


From lcrees at gmail.com  Wed Apr 13 18:26:36 2005
From: lcrees at gmail.com (lugal)
Date: 13 Apr 2005 15:26:36 -0700
Subject: Utah Python Users Group
Message-ID: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>

Is anyone aware if there's a Utah-based Python User Group? If not, does
any else from Utah have any interest in forming a Utah-based Python
User Group?



From http  Tue Apr  5 11:41:31 2005
From: http (Paul Rubin)
Date: 05 Apr 2005 08:41:31 -0700
Subject: Python Google Server
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
Message-ID: <7x7jjhw7ro.fsf@ruckus.brouhaha.com>

fuzzyman at gmail.com writes:
> (This is actually an 'inventive' short term measure to get round a
> restrictive internet policy at work :-) 

If that means what I think, you're better off setting up a
url-rewriting proxy server on some other machine, that uses SSL on the
browser side.  There's one written in perl at:

   http://www.jmarshall.com/tools/cgiproxy/

Presumably you're surfing through some oppressive firewall, and the
SSL going into the proxy prevents the firewall from logging all the
destination URL's going past it (and the content too, for that matter).


From claudio.grondi at freenet.de  Tue Apr 26 06:24:28 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 26 Apr 2005 10:24:28 -0000
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>
	<d4jec2$20g$1@sea.gmane.org>
	<mailman.2485.1114456610.1799.python-list@python.org>
	<1114477978.067147.293900@z14g2000cwz.googlegroups.com>
Message-ID: <3d6c7jF6oidokU1@individual.net>

Conclusion:
---------------
I agree with Bill Mill saying
"I'd suggest that he [Xah Lee] actually make
an effort at improving the docs before
submitting them."
so I am still waiting for the final version
before deciding which docu is
better, believing, that if Xah Lee puts
more work and serious efforts into his
attempt it could result in a docu clear
superior to the existing one.


Argumentation:
---------------------
Both documentations are different approaches
and it is currently hard for me to tell which one
is really better (the proposed is better structured,
the existing provides information missing
in the proposed).
In both, the existing and the proposed
documentation I am still missing a good
introductory part showing what regular
expressions are good for and
what are the limitations, i.e. when is it better
to use self-written code instead of regexs
(including examples of both, very simple
and more complex real-world problems).
I would also miss some of the information
removed from the docs in the proposed
documentation.
>From my point of view both, the existing and
the proposed documentation assume some
knowledge about regular expressions as
such, so doesn't really explain, beeing
limited to showing the syntax of usage.
In other words, I am missing the "Pythonic
approach" here.

Claudio
P.S. sorry for not including details in my comment,
but to show what I mean would require rewriting
the docs ...

"Xah Lee" <xah at xahlee.org> schrieb im Newsbeitrag
news:1114477978.067147.293900 at z14g2000cwz.googlegroups.com...
Dear Steve Holden,

the rewrite of the regex doc is instigated by your offer.

it is published and announced here on April 18th. If you deem it
proper, paypal me. It will be to your credit and easier to incorporate
into the main doc.

 Xah
 xah at xahlee.org
? http://xahlee.org/





From pclinch at internet-glue.co.uk  Fri Apr  8 11:19:18 2005
From: pclinch at internet-glue.co.uk (Paul Clinch)
Date: 8 Apr 2005 08:19:18 -0700
Subject: import statement - package visibility problem
References: <mailman.1478.1112870310.1799.python-list@python.org>	<8cf2994e.0504071024.69de669f@posting.google.com>
	<mailman.1500.1112901325.1799.python-list@python.org>
Message-ID: <8cf2994e.0504080719.2c825135@posting.google.com>

Laszlo,

...

> Importing from a not package related source code is not a problem, 
> really. My problem is about importing inside a package.
> 
> Lib/Server/Db/__init__.py __can__  import Lib/Server/Db/Adapters usign 
> relative paths, but
> 
> Lib/Server/Db/Adapters/PostgreSQLConnection.py  __cannot__  import from 
> Lib/Server/Db using relative paths
> 
> Of course I can do the latter import using absolute paths but that is 
> something I would like to avoid. In other words:
> it is possible to import using relative lib paths only in one direction. 
> Why is that? Why can't I import something
> "from the containing package"?
> 

Yes it might be convenient for what you want to do, but importing from
containing package means traversing up the directory structure from
importing module.


> >Or you can define any rules for mapping files and directories to the name space
> >you desire.
> >  
> >
> How to do that? By hacking?

Well, yes, Python hacking. See the imp module for interesting
functions such as load_module:-

import imp
filename = 'Lib2/Server/Db/DatabaseConnection.py'
connection = load_module( 'connection', open(filename),
filename,('.py', 'U', 1) )

There is a load_package function not documented, I haven't attempted
to use it, but you could read the source (import.c).

You could also look at the builtin function __import__.

Lastly you could look at the new import hooks (PEP 302) in the sys
module, implemented in 2.3, where you define a find_module that
returns a loader object.

Regards, Paul Clinch


From steven.bethard at gmail.com  Tue Apr 12 00:36:52 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 11 Apr 2005 22:36:52 -0600
Subject: singleton objects with decorators
In-Reply-To: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
Message-ID: <ec6dnbne_Lf_zcbfRVn-tA@comcast.com>

Uwe Mayer wrote:
> I've been looking into ways of creating singleton objects.

It strikes me that I've never wanted or needed a singleton object. 
Would you mind sharing your use case?  I'm just curious.

Thanks,

STeVe


From rkern at ucsd.edu  Fri Apr 15 12:00:03 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 15 Apr 2005 09:00:03 -0700
Subject: new to mac OS10
In-Reply-To: <d3ojjf$n11$1@geraldo.cc.utexas.edu>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>
	<d3ojjf$n11$1@geraldo.cc.utexas.edu>
Message-ID: <d3oo7e$gki$1@sea.gmane.org>

Thomas Nelson wrote:
> The main thing I would like is to be able to use tkinter with python on 
> my mac.  will the command-line-style source allow this?  Does it come 
> with IDLE? 

No. You need a framework version, which can be built from source, but 
it's best to leave that to people who know what they're doing.  ;-)

http://python.org/ftp/python/2.4.1/MacPython-OSX-2.4.1-1.dmg

As for restoring Python 2.3.0, see below before going further. You may 
have to reinstall the OS or parts of it. Or you might also be able to 
snag the directories from another suitable OS X installation using the 
appropriate tools.

And next time, *don't delete system files*!

> How is the fink version different from the source i can 
> download at python.org?  Here's the result of the requested commands on 
> my Terminal.  It would appear that these links are broken, as 
> Python.framework no longer exists.  Sorry to be so much trouble,
> 
> THN
> 
> 
> 
> Welcome to Darwin!
> ~ $ ls -all /usr/bin/python*
> lrwxr-xr-x  1 root  wheel    9 20 Jun  2004 /usr/bin/python -> python2.3
> lrwxr-xr-x  1 root  wheel   72 20 Jun  2004 /usr/bin/python2.3 -> 
> ../../System/Library/Frameworks/Python.framework/Versions/2.3/bin/python
> lrwxr-xr-x  1 root  wheel   10 20 Jun  2004 /usr/bin/pythonw -> pythonw2.3
> -rwxr-xr-x  1 root  wheel  122  8 Jun  2003 /usr/bin/pythonw2.3
> ~ $ ls /System/Library/Framework/Python.framework
> ls: /System/Library/Framework/Python.framework: No such file or directory
> ~ $ cd /System/Library/Framework/Python.framwork
> -bash: cd: /System/Library/Framework/Python.framwork: No such file or 
> directory
> ~ $

You misspelt the framework path in both cases.

Blasphemy:~ kern$ ls /System/Library/Frameworks/Python.framework/
Headers   Python    Resources Versions

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From fuzzyman at gmail.com  Fri Apr 29 04:47:27 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 29 Apr 2005 01:47:27 -0700
Subject: Trying to write CGI script with python...
In-Reply-To: <mailman.9.1114734748.14961.python-list@python.org>
References: <mailman.9.1114734748.14961.python-list@python.org>
Message-ID: <1114764447.780655.76820@g14g2000cwa.googlegroups.com>

If you just want to wrap an existing python script - but pass arguments
from a web interface, it ought to be very easy.

You'll need to understand CGI of course. There's a good free article
about getting started with CGI over at PyZine ( http://www.pyzine.com )
;-)

Can you confirm that your CGI is receiving the arguments correctly ?
How are you calling your partners script ?

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python/cgi.shtml



From mefjr75 at hotmail.com  Fri Apr 29 16:27:56 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 29 Apr 2005 13:27:56 -0700
Subject: Trying to write CGI script with python...
In-Reply-To: <1114803082.851505.149730@o13g2000cwo.googlegroups.com>
References: <mailman.9.1114734748.14961.python-list@python.org>
	<1114803082.851505.149730@o13g2000cwo.googlegroups.com>
Message-ID: <1114806476.477679.150290@f14g2000cwb.googlegroups.com>

I found an excellent example that was posted by the F-bot.
Fredrik Lundh  	  May 26 2000
From: "Fredrik Lundh" <fred... at pythonware.com>
Date: 2000/05/26

richard_chamberl...@ wrote:
> I'm having great difficulties getting Python to work via CGI.

> Is there anyway I can get the traceback on to the web page so I know
what's
> happening?

the easiest way is to split your CGI module in two parts; use the
following
script as a wrapper, and place the program logic in a separate script
("my-
script.main()" in this case):

#!/usr/bin/env python

import cgi, StringIO, sys, traceback

try:
    import myscript
    myscript.main()
except:
    print "Content-Type:", "text/html"
    print
    file = StringIO.StringIO()
    traceback.print_exc(file=file)
    print "<pre>"
    print cgi.escape(file.getvalue())
    print "</pre>"

> I haven't got access to error logs so I can't look at it that way.

</F>



From vetter at lincom-asg.com  Wed Apr 13 11:12:05 2005
From: vetter at lincom-asg.com (Keith)
Date: 13 Apr 2005 08:12:05 -0700
Subject: A Question About Handling SIGINT With Threads
Message-ID: <1113405125.076387.259450@l41g2000cwc.googlegroups.com>

I got this to work, but was hoping there was a better way.  I was
hoping that I wouldn't have to use globals.  I wouldn't doubt that I
could be totally off in what I am doing.

Here is some psuedo-code of what I did:

def main_thread():
      # Don't know how to get rid of these guys
      global lock
      global my_thread

      # Set up a signal handler for Ctrl-C
      signal.signal(signal.SIGINT, sighdlr)

      # Create & start thread
      lock = thread.allocate_lock()
      lock.acquire()
      my_thread = threading.Thread(
                              target=child_thread,
                              name='thread_test',
                              args=(lock,)
      my_thread.start()

      do_some_work_here()

      # Tell thread to stop working
      lock.release()

      # Wait for child thread to finish
      my_thread.join()

def child_thread(lock):

      while lock.locked():
              do_some_stuff()

      do_some_cleanup()

def sighdlr(signum, frame):

      # Allow child to finish
      lock.release()
      my_thread.join()
      sys.exit(1)



From vze4rx4y at verizon.net  Mon Apr  4 15:44:10 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Mon, 04 Apr 2005 19:44:10 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com> <_2R3e.3341$7b.3033@trndny06>
	<uqednS7IkJQ69M3fRVn-qQ@comcast.com>
Message-ID: <eOg4e.2512$7b.37@trndny04>

[Steven Bethard]
> and I often find myself alternating
> between the two when I can't decide which one seems more Pythonic.

Both are pythonic.

Use a genexp when you need a generator
and use a listcomp when you need a list.


Raymond Hettinger




From ucntcme at gmail.com  Mon Apr 25 06:30:07 2005
From: ucntcme at gmail.com (ucntcme at gmail.com)
Date: 25 Apr 2005 03:30:07 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<mailman.1876.1113453407.1799.python-list@python.org>
	<n9c1j2-198.ln1@home.rogerbinns.com>
	<d3vscb$i8r$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <1114425007.428213.165860@g14g2000cwa.googlegroups.com>

It would be *really* nice if it worked for Python itself for making an
RPM distribution of Python.



From steve at holdenweb.com  Wed Apr 13 11:12:31 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 11:12:31 -0400
Subject: terminate exectutioin in PythonWin
In-Reply-To: <d3j3em$nhh$1@scotsman.ed.ac.uk>
References: <d3j265$ne6$1@scotsman.ed.ac.uk>	<4u6dnQT8_ecAk8DfRVn-pA@comcast.com>
	<d3j3em$nhh$1@scotsman.ed.ac.uk>
Message-ID: <d3jcm8$817$2@sea.gmane.org>

Jim wrote:
[...]
> 
> Actually I meant how do I stop a program running that I have started in 
> the interpreter. If I get into an infinite loop I can't stop it without 
> qutting PythonWin.
> 
> Then I have to open all the files and re-insert breakpoints etc.  :(
> 
> Jim

Look in the system tray! Right-mouse on the Python and select "break 
into running program".

regards
  Steve


-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From robin at reportlab.com  Wed Apr 27 05:29:06 2005
From: robin at reportlab.com (Robin Becker)
Date: Wed, 27 Apr 2005 10:29:06 +0100
Subject: regex over files
In-Reply-To: <pan.2005.04.26.21.39.15.988504@jerf.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>
	<pan.2005.04.26.21.39.15.988504@jerf.org>
Message-ID: <426F5B62.3010801@chamonix.reportlab.co.uk>

Jeremy Bowers wrote:
> On Tue, 26 Apr 2005 20:54:53 +0000, Robin Becker wrote:
> 
> 
>>Skip Montanaro wrote:
>>...
>>
>>>If I mmap() a file, it's not slurped into main memory immediately, though as
>>>you pointed out, it's charged to my process's virtual memory.  As I access
>>>bits of the file's contents, it will page in only what's necessary.  If I
>>>mmap() a huge file, then print out a few bytes from the middle, only the
>>>page containing the interesting bytes is actually copied into physical
>>>memory.
>>
>>....
>>my simple rather stupid experiment indicates that windows mmap at least 
>>will reserve 25Mb of paged file for a linear scan through a 25Mb file. I 
>>probably only need 4096b to scan. That's a lot less than even the page 
>>table requirement. This isn't rocket science just an old style observation.
> 
> 
> Are you trying to claim Skip is wrong, or what? There's little value in
> saying that by mapping a file of 25MB into VM pages, you've increased your
> allocated paged file space by 25MB. That's effectively tautological. 
> 
> If you are trying to claim Skip is wrong, you *do not understand* what you
> are talking about. Talk less, listen and study more. (This is my best
> guess, as like I said, observing that allocating things increases the
> number of things that are allocated isn't worth posting so my thought is
> you think you are proving something. If you really are just posting
> something tautological, my apologies and disregard this paragraph but,
> well, it's certainly not out of line at this point.)

Well I obviously don't understand so perhaps you can explain these results

I implemented a simple scanning algorithm in two ways. First buffered scan 
tscan0.py; second mmapped scan tscan1.py.

For small file sizes the times are comparable.

C:\code\reportlab\demos\gadflypaper>\tmp\tscan0.py bingo.pdf
len=27916653 w=103 time=22.13

C:\code\reportlab\demos\gadflypaper>\tmp\tscan1.py bingo.pdf
len=27916653 w=103 time=22.20


for large file sizes when paging becomes of interest buffered scan wins even 
though it has to do a lot more python statements. If this were coded in C the 
results would be plainer still. As I said this isn't about right or wrong it's 
an observation. If I inspect the performance monitor tscan0 is at 100%, but 
tscan1 is at 80-90% and all of memory gets used up so paging is important. This 
may be an effect of the poor design of xp if so perhaps it won't hold for other 
os's.

C:\code\reportlab\demos\gadflypaper>\tmp\tscan0.py dingo.dat
len=139583265 w=103 time=110.91

C:\code\reportlab\demos\gadflypaper>\tmp\tscan1.py dingo.dat
len=139583265 w=103 time=140.53


C:\code\reportlab\demos\gadflypaper>cat \tmp\tscan0.py
import sys, time
fn = sys.argv[1]
f=open(fn,'rb')
n=0
w=0
t0 = time.time()
while 1:
     buf = f.read(4096)
     lb = len(buf)
     if not lb: break
     n += lb
     for i in xrange(lb):
         w ^= ord(buf[i])
t1 = time.time()

print "len=%d w=%d time=%.2f" % (n, w, (t1-t0))

C:\code\reportlab\demos\gadflypaper>cat \tmp\tscan1.py
import sys, time, mmap, os
fn = sys.argv[1]
fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
n=len(s)
w=0
t0 = time.time()
for i in xrange(n):
     w ^= ord(s[i])
t1 = time.time()

print "len=%d w=%d time=%.2f" % (n, w, (t1-t0))




-- 
Robin Becker



From ugo_digirolamo at InVision.iip.com  Wed Apr 27 01:41:10 2005
From: ugo_digirolamo at InVision.iip.com (ugodiggi)
Date: 26 Apr 2005 22:41:10 -0700
Subject: Problem with embedded python
References: <mailman.2546.1114552893.1799.python-list@python.org>
	<116u2pfsesg1ae2@corp.supernews.com>
Message-ID: <1114580470.726989.102020@z14g2000cwz.googlegroups.com>

Tom Cocagne wrote:
> From looking at your example, it looks like you're making the problem
FAR
> more difficult than it needs to be. The main thing to keep in mind is
that
> Python threads do not correspond to operating system threads. In an
> application using a single OS-level thread, you can use as many
Python
> threads as you like. The thread-switching mechanism in Python is to
> transfer control between threads after the execution of 100
bytecodes. The
> GIL is used to insure that only 1 operating system thread is
executing
> bytecodes at any given time. This allows os threads to sleep on
blocking
> calls (usually I/O) without necessarily stalling the interpreter.
>
>  Your example appears to be written under the assumption that the
spawned
> Python thread will operate concurrently with your main thread. That
will
> not be the case. The PyRun_SimpleString() call will operate entirely
within
> the main thread and will not return until the Python thread has
completed
> operation (so no GIL manipulation is needed). The subsequent Sleep()
call
> will simply halt the process for 300ms.
>
>  Regular threading is difficult enough to get right without throwing
the
> Python-thread / OS-thread interaction into the mix. It's a tough nut
to
> crack so don't feel bad if it takes a while to get everything
straight ;-)
> The quickest and most practical approach would probably be to read
through
> some code that's similar to what you're shooting for. I'd suggest
taking a
> look at some of the modules in the Python source code (particularly
the
> network related ones) to get a better handle on how threads are
managed.
>
>  Cheers,
>
>  Cocagne
>
<removed code>

Tom,

Thank you for your answer.

This code is not the real "problem child", but a slimmed down version
that seems to reproduce a problem that I see in a much larger system.

My understanding of the python GIL works as follows:
1) when I start the embedded python interpreter (Py_Initialize,
PyEval_InitThreads), I own the GIL.
So I need to release it for other threads to be able to do anything.
I don't have other threads, so nothing is happening.

2) when I want to use PyRun_SimpleString, I need to acquire the GIL
before, and release it after. By doing this, no python thread will run
while I'm running my simple string, regardless of anything because the
C is owning the GIL.

3) after I release the GIL, all the python threads are actually free to
run, and they actually will. Since I'm on WXP, python threads ARE
actually os threads, as I can see from my debugger.
I do get my nice pippo.out file with the numbers from 0 to 29 or 30,
which is coherent with the sleeps.

4) when I want to shut down the whole thing, I acquire the GIL and then
I call Py_Finalize, which should pretty much kill all the threads
cleanly.

The crash that I'm getting is during step 4, in the python thread,
while in the main thread I'm calling Py_Finalize.
Maybe I'm doing something wrong in one of the steps, but I cannot see
what.

My best guess is that the words from the ref manual:
"The lock is also released and reacquired around potentially blocking
I/O operations like reading or writing a file, so that other threads
can run while the thread that requests the I/O is waiting for the I/O
operation to complete. "
are haunting me, but I'm not sure how.

Thanks again

Cheers & ciao

Ugo



From ville at spammers.com  Wed Apr  6 03:01:58 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 10:01:58 +0300
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
	Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
Message-ID: <du7zmwcgzh5.fsf@mozart.cc.tut.fi>

>>>>> "Sunnan" == Sunnan  <sunnan at handgranat.org> writes:

    Sunnan> It's just that I'm having a hard time matching that quote
    Sunnan> to what I though python was about. I thought boring code
    Sunnan> was considered a virtue in python. ("Explicit is better
    Sunnan> than implicit", "sparse is better than dense".)

Boring code is code that numbs your senses with constant flow of
boilerplate crap, memory management and redundant type declarations
and general blah blah that you skip when you are trying to figure out
what a piece of code does. It's a code that you wish you could train a
monkey to write for you while you go for lunch. Think C++ or Java.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From fphsml at gmail.com  Sun Apr 17 14:00:40 2005
From: fphsml at gmail.com (James)
Date: 17 Apr 2005 11:00:40 -0700
Subject: Python's use in RAD
In-Reply-To: <1113581399.801318.277950@f14g2000cwb.googlegroups.com>
References: <mailman.1972.1113576517.1799.python-list@python.org>
	<1113581399.801318.277950@f14g2000cwb.googlegroups.com>
Message-ID: <1113760840.877991.153340@o13g2000cwo.googlegroups.com>

brian.peyton at gmail.com wrote:
> Active State's Komodo IDE is very nice for python development.  It
> includes integration with pdb (python's debugger).  The pro edition
> also has a GUI designer, however I've never used it.  The personal
> version for non commercial use can be had for $30 (and there's also a
> 30 day trial).  They have windows, linux, and solaris versions.
>
> Ross Cowie wrote:
> > Hi,
> >
> > I am currenly a second year university student and was wondering if
> you
> > could help me ut. As part of a project i have decided to write
about
> python,
> > i am not having very much luck with regards to finding infrmation
on
> pythons
> > use in Rapid Application Development, and was wondering of you
could
> > highlight some of the features that make it suitable for RAD. Like
> the use
> > of dinamic binding.
> >
> > Your healp would be appreciated.
> >
> > Hope to hear from you soon.
> >
> > Ross

I don't think he is asking for tools that he could use for creating GUI
apps. Instead he is asking for the features of Python that would make
it easier to build RAD tools to put in his homework.



From fredrik at pythonware.com  Fri Apr 15 08:18:42 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 15 Apr 2005 14:18:42 +0200
Subject: Python - interpreted vs compiled
References: <1113566234.343746.48460@o13g2000cwo.googlegroups.com>
Message-ID: <d3ob8e$2o8$1@sea.gmane.org>

"codecraig" wrote:

>  I have a question about Python.  I know that it is an interpreted
> language, meaning a python program is converted to binary on the fly
> each time it is run, or compiled.
>  What would be the purpose of compiling?  I guess the compiled python
> code (question, is compiled python code called byte code?..if not, what
> is it called?) is not readable since it is not plain text, which may be
> a reason for compiling...but why else??

the Python runtime runs custom object code ("byte codes") on a virtual machine.
the compilation process converts source code to object code.  to speed things up,
the object code (or byte code, if you prefer) is stored on disk, so it can be reused
the next time the program is run.

</F> 





From donn at u.washington.edu  Wed Apr 27 12:14:57 2005
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 27 Apr 2005 09:14:57 -0700
Subject: Secure FTP
References: <mailman.2563.1114592871.1799.python-list@python.org>
Message-ID: <donn-522657.09145727042005@gnus01.u.washington.edu>

In article <mailman.2563.1114592871.1799.python-list at python.org>,
 Daniel Bowett <daniel at bowettsolutions.com> wrote:

> I need to download files over a secure channel.
> 
> I have been looking into Paramiko which seems to have the functonality I 
> need. The problem is I need a FTP server which supports key based 
> encryption to install on my windows server.
> 
> Has anyone succeeded in doing this? If so - what FTP server did you use?

Well, not precisely this, since we're fortunate to be able to
leave the Microsoft part out of the equation, but it may help
to know that GSSAPI Kerberos5 is a standard FTP authentication
that includes encryption, so if you can authenticate that way,
you can get encrypted data transfer.

Microsoft supports and uses Kerberos5 -- their "domain controller"
is a Kerberos KDC -- but interoperability with other platforms is
a problem, and so far as I know it's purely internal and never
supported in Microsoft's own software for any of the client/server
protocols that use it elsewhere.

   Donn Cave, donn at u.washington.edu


From fredrik at pythonware.com  Tue Apr 12 02:36:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 08:36:07 +0200
Subject: Problem with downloading from www
References: <pan.2005.04.12.06.22.16.63000@yahoo.com>
Message-ID: <d3fq1t$icg$1@sea.gmane.org>

"NewFilmFan" <gg at yahoo.com> wrote:

> I wrote this program:
>
> import httplib
> conn = httplib.HTTPConnection("www.x.net")
> conn.request("GET", "/x/y.jpg")
> r1 = conn.getresponse()
> print r1.status, r1.reason
> data = r1.read()
> datei = open('test.jpg','w')
> datei.write(data)
> datei.close()

if all you want to do is to download files from the web, urllib is a lot more
convenient:

    urllib.urlretrieve("http://www.x.net/x.y.jpg", "test.jpg")

> It is almost a copy of the manual. Now I can establish the connection and
> receive the data. (The first response from the server is 200, OK.) The jpg
> file is 198 K. But it is not a valid jpeg file. When I download with my
> browser, the file has the length 197K and it is valid, of course. Is this
> a problem of writing text or binary data to a file?

changing the open() call to

    datei = open('test.jpg','wb')

should fix this.

see the library documentation for details.

</F> 





From rkern at ucsd.edu  Fri Apr  1 22:37:30 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 01 Apr 2005 19:37:30 -0800
Subject: Ternary Operator in Python
In-Reply-To: <2po3e.21052$d5.156184@newsb.telia.net>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com><mailman.1198.1112380413.1799.python-list@python.org>	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
	<mailman.1212.1112398120.1799.python-list@python.org>
	<2po3e.21052$d5.156184@newsb.telia.net>
Message-ID: <d2l41q$ess$1@news1.ucsd.edu>

Sunnan wrote:
> Terry Reedy wrote:
> 
>> Gee, what about 0.0 < a < 1.0 < b < 2.0?  I see both as synthesized 
>> multinary operators, but your are right in that this combination does 
>> act differently than a+b+c.
> 
> 
> Is < really multinary in python? It looks binary to me, just like +.
> 
> (a+b)+c
> 
> (((0.0 < a) < 1.0) < b ) < 2.0

Go on. Try it with a bunch of different values.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From tjreedy at udel.edu  Tue Apr 26 13:22:28 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 26 Apr 2005 13:22:28 -0400
Subject: What's do list comprehensions do that generator expressions
	don't?
References: <86ll77pgqz.fsf@guru.mired.org><mailman.2430.1114408769.1799.python-list@python.org><pan.2005.04.25.19.29.02.291034@jerf.org><du7wtqq8ukz.fsf@mozart.cc.tut.fi><mailman.2489.1114462128.1799.python-list@python.org><426ddda7.553554359@news.oz.net>
	<861x8ynha0.fsf@guru.mired.org>
Message-ID: <d4lt2n$1mh$1@sea.gmane.org>


"Mike Meyer" <mwm at mired.org> wrote in message
> The question under these circumstances is then: do you want bare
> genexp to mean something? Right now, it's a syntax error. But there's
> no reason you couldn't have:
>
>   y = x for x in stuff
>
> assign a generator object to y.

Since this was considered, there is a reason why we don't have this.  As I 
remenber, but vaguely, Guido's reasoning was both stylistic and technical, 
but you'd have to check the archives for more.

Terry J. Reedy






From quasara at earthlink.net  Mon Apr 18 15:21:33 2005
From: quasara at earthlink.net (sheltech)
Date: Mon, 18 Apr 2005 19:21:33 GMT
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven wh
References: <1113707535.383715.327170@g14g2000cwa.googlegroups.com>
	<rzl8e.7988$sp3.2080@newsread3.news.atl.earthlink.net>
	<1113806696.907908.323410@g14g2000cwa.googlegroups.com>
	<rockon02-1804051949220001@1cust237.tnt5.adl1.da.uu.net>
Message-ID: <1NT8e.8946$sp3.3239@newsread3.news.atl.earthlink.net>

No, but I know some cowboys who are ... (how can I put this delicately?)
er...
inclined towards the bovine , who yell "Bramah !" . Did I say I knew
them?...
I meant "knew OF" them. Yeah , "OF".

HTH

DS
"Mike brown" <rockon02 at senet.com.au> wrote in message
news:rockon02-1804051949220001 at 1cust237.tnt5.adl1.da.uu.net...
> In article <1113806696.907908.323410 at g14g2000cwa.googlegroups.com>,
> "thesonoftruth" <thesonoftruth at aol.com> wrote:
>
> > I wonder if anyone yells VISHNU !!  VISHNUUUUUUUUUUUUU !  when making
> > out,
>
>
> I might have.
>
> It's been so long that I've forgotten.
>
> MJRB
>





From irmen.NOSPAM at xs4all.nl  Sat Apr  2 10:59:04 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 02 Apr 2005 17:59:04 +0200
Subject: instance name
In-Reply-To: <99z3e.1157607$35.42889387@news4.tin.it>
References: <99z3e.1157607$35.42889387@news4.tin.it>
Message-ID: <424ec149$0$142$e4fe514c@news.xs4all.nl>

max(01)* wrote:
> hi.
> 
> is there a way to define a class method which prints the instance name?
> 
> e.g.:
> 
>>>> class class_1:
> ...   def myName(self):
> ...     ????what should i do here????
> ...
>>>> instance_1 = class_1()
>>>> instance_1.myName()
> 'instance_1'
>>>>
> 
> bye
> 
> macs

What should the following do, you think?

>>> a=class_1()
>>> b=a
>>> b is a
True
>>> b.myName()
????print what????

There is no such thing as "the" instance name.
(a and b both point to the same instance, in my example)

Also: why do you want this? It smells like you're
actually looking for the use of a dict to do your job.

--Irmen


From elbertlev at hotmail.com  Mon Apr 11 08:52:20 2005
From: elbertlev at hotmail.com (elbertlev at hotmail.com)
Date: 11 Apr 2005 05:52:20 -0700
Subject: database in python ?
In-Reply-To: <slrnd5k35t.rjl.klaus@main.szn.dk>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<slrnd5k35t.rjl.klaus@main.szn.dk>
Message-ID: <1113223940.811667.110250@o13g2000cwo.googlegroups.com>

aji... at gmail.com wrote:
> I need to build table which need searching data which needs more
> power then dictionary or list in python, can anyone help me what
> kind of database suitable for python light and easy to learn. Is
> mySQL a nice start with python ?

It depends... mySQL is fine for more or less data centric applications
with many tables.

When I need SQL search power, but the number of tables/records is small
enough  gadfly is the best bet. Contact database, CD catalog, extended
configuration data are proper examples. In such cases, gadfly is by far
faster, then "normal" relational databases.



From eurleif at ecritters.biz  Fri Apr  8 17:16:40 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 08 Apr 2005 21:16:40 GMT
Subject: text processing problem
In-Reply-To: <d34a7f$gnd$1@domitilla.aioe.org>
References: <d34a7f$gnd$1@domitilla.aioe.org>
Message-ID: <YwC5e.620$5I5.31782@newshog.newsread.com>

Maurice LING wrote:
> I'm looking for a way to do this: I need to scan a text (paragraph or 
> so) and look for occurrences of "<text-x> (<text-x>)". That is, if the 
> text just before the open bracket is the same as the text in the 
> brackets, then I have to delete the brackets, with the text in it.


How's this?

import re

bracket_re = re.compile(r'(.*?)\s*\(\1\)')

def remove_brackets(text):
     return bracket_re.sub('\\1', text)


From rkern at ucsd.edu  Wed Apr 13 18:50:40 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 13 Apr 2005 15:50:40 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1793.1113334936.1799.python-list@python.org>	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1818.1113375260.1799.python-list@python.org>	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1823.1113383437.1799.python-list@python.org>
	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3k7hs$nlk$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
> 
>>Antoon Pardon wrote:
>>
>>>Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>>
>>>>Yes, the license text and the copyright notice must be attached. It 
>>>>doesn't mean that the PSF license is the operative one for the 
>>>>derivative work.
>>>
>>>
>>>Why attach a license that is not operative. That doesn't make sense
>>>to me and will IMO just create confusion.
>>
>>Because it's not your code. The tiny obligation that you have to satisfy 
>>is to say that some of the code comes from someone else and is available 
>>under such-and-such a license. That's it. You can keep the code hidden, 
>>you can charge whatever you like for it, but you have to attribute it 
>>properly. Open source licenses don't get much less restrictive than this.
> 
> 
> Well maybe this is a semantic problem. I wouldn't use the word "attach"
> here.

Fair enough. The license text is included *for reference*, not because 
it is *the* license for the derived work. In fact, it *can't* be the 
license of the derived work because you are not the PSF.

> So what I seem obligated to do, is 1) Mentioning this came
> from the python distribution and 2) explain where this distribution can
> be attained and under what license.

The minimum is:

1) Put the copyright notice in.
2) Reference a copy of the PSF License. (Practically speaking, a URL 
will probably do.)
3) List the modifications you made.
4) Put your copyright notice in and whatever terms you want to apply.

>>Of course, IANAL and TINLA, so if you want real legal advice instead of 
>>advice from random newsgroup bums like myself, you should talk to a lawyer.
> 
> 
> Well if it comes so far I have to consult a lawyer I'd rather not publish
> it in the first place.

Then take the (free) advice that you asked for. And please do read 
Rosen's book.

> The only reason I'm concerned is that this is to be part of a tutorial
> and I prefer not to burden those who read the tutoral with any kind of
> license. As far as I'm concerned people reading the tutorial can use
> any code provided with it in any way they see fit.

You can't *quite* go that far if you are deriving code from Python, but 
it's about as close as you can get. You still have those light 
restrictions about attribution and notification of changes.

> I see this as my contribution to the communities who has provided me
> with all kinds of things that are usefull to me. I'm willing to put
> time into this, but if I have to spend money because it is impossible
> otherwise to find out how to contribute legally, that is a hurdle
> I'm reluctant to take.

You could take a look at what other people are doing. Most of us here 
are writing and releasing software derived from Python, legally so and 
without complication.

No one but your own lawyer can make any guarantees, but most of us here 
have done just fine without one.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From mwm at mired.org  Mon Apr 25 23:56:48 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 22:56:48 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
Message-ID: <86is2anqbj.fsf@guru.mired.org>

John Bokma <john at castleamber.com> writes:

> Mike Meyer wrote:
>
>> John Bokma <john at castleamber.com> writes:
> [ unless ]
>> Yeah - unless is a bad idea.
> LOL, because you don't like it?

Oh, come on. You say something, I agree with it, so you remove your
original comment so you can argue with me? You're just being
argumentative. Surely you can do better than that. But I'll humor you.

> You already showed code like:

Actually, I never showed you this code. You went out of your way to
make it uglier than it was.

> if condition then
>    nothing
> else
>    something
> unless IMNSHO improves readability.

Anyone can create bogus use cases to show how some random construct
can improve readability. If you show the construct to a *good*
programmer and they come up with a rewrite that doesn't need the
construct, then the construct is a bad idea.

In this case, the good rewrite invokes the well-known logical operator
"not":

if not condition then
   something

>>> I doubt that features have been added to Perl just because. Even ones
>>> that look like it, unless for example, have an excellent use, it
>>> makes the code more readable.
>> Then why do most Perl programmers consider unless "! a good idea"?
> Reread the last part of the last sentence you quoted above.

I can't - in being argumentative, you neglected to include it.

>>> *sigh* you gave a list of problems, I replied by putting all answers
>>> on one line, with () around them, and commas between them. I was not 
>>> constructing a tuple, or a list in Perl 
>> Right. You were constructing something for humans to read - and
>> managed to construct something that was a PITA to read. If you'd made
>> the oher choice, it wouldn't have been a PITA to read.
> *sigh*, you asked several *stand alone* problems, from the context of 
> your question especially *you* should have been able to grasp that I 
> wasn't creating some silly list. The etc was a giveaway.

Um, I suggest you brust up on your English skills. What you created
was a list. Not in Python or Perl, but in English. It turned out to be
a silly list because a syntactic element of the items in the list was
identical to a syntactic element in the list, with nothing to set it
off.

>>> But the bottom line is: I gave you answers to all, except one, of
>>> your problems, you think my set of answers is a kind of Perl list,
>>> you thought the grep was plainly wrong, and I guess you are not
>>> comfortable with split.
>> 
>> I thought your answer was a kind of list, but the syntax you chose
>> made it completely unclear where each item ended, because you
>> overloaded the "," character to seperate arguments to functions in the
>> list as well as to separate items in the list.
>
> You claimed to have some experience with perl, so I was *hoping* that 
> you at least were able to understand sort, split, and grep are perl 
> keywords. I mean, as a joke, I even almost translated your examples 
> literaly e.g.

Oh, I understood it. It just took more work than it would have if
you'd done it the other way. Ok, so you were making a joke. I'll get
around to laughing at it eventually.

>> Choosing the other
>> option would have grouped the arguments, and made things clear.
> I doubt it, you are just looking everywhere for a point, there is none. 
> Your Perl skills are doubtfull to say the least. And yet you think you 
> can say how badly it is designed, and so many things are wrong with it.

If you look, you'll find the example where I chose the right
option. That will put your doubts at rest.

And so far, I've only said *two* things were wrong with Perl. One is
that it provides more than one way to do things - which point you've
made for me by arguing about how you did/didn't choose the right one
in an example. I also said that it's failure to flag assigning the
output of map/grep (there's that multiple choices thing again) to a
scalar when you wanted a list was bad. You haven't argued that I was
wrong about Perl in either case.

> To me you appear like a parrot, just repeating what you read somewhere, 
> or heard somewhere.

Nah, I seldom listen to what other people have to say about Perl - at
least since I stopped developing in it. I did read "The seven deadly
sins" page, but have mostly forgotten that.

>>> And this gives me the feeling that you either haven't been using Perl
>>> for over 4 years, or was never got beyond the absolute beginner
>>> level. In the latter case I can imagine that you are overwhelmed by
>>> Perl. As would one by any language.
>> I'll admit it's been a while since I did anything other than
>> debugging. I haven't had much call to do the things that Perl is
>> really good at (simple re-heavy scripts), so I haven't done much
>> development in it.
> Amazing, how can you debug if you know next to nothing of it?

So either your assessment of my skills is *way* off, or I'm an
*amazing* programmer.

>> You may be overwhelmed by any language. I'm not.
> Sure, LOL. You are so overwhelmed with Perl that you even lack the basic 
> skills, but yet nag about it a lot.

At this point, I'm *underwhelmed* with Perl. And let's see - less than
one conversation a year for the past nine years. Yeah, that's nagging
about it a lot. I'd say both your assessments were equally accurate.

>>> In a pure language such things are in the library.
>> So, where's the ARM assemblly library that includes dictionaries?
> I don't have access to a small one I wrote ages ago. But I am sure there 
> are enough people who can provide you with one, or otherwise, as a 
> skilled programmer, you would be able to write one in a day or less.

In other words, I have to write in a dialect of the language. As I'm
sure you're aware by now, that's a sign of bad language design. No
thanks.

>> You keep harping on restrictions. Garbage collection isn't a
>> restriction. It's a feature.
> It's also a restriction. Why do you think in Java one can call the gc 
> explicitly?

If it's a restriction, there must be something it restricts you from
doing. Care to tell me exactly what garbage collection keeps you from
doing?

>>> Moreover, good programmers rarely need to be restricted. But I don't
>>> see garbage collection as an anti-memory-leak restriction (which it
>>> can't be in all cases) but as a time saver.
>> I think garbage collection is a time saver as well. It saves me time
>> hunting bugs caused by incorrect usage of the facilities it
>> replaced. It may save a little time in not having to write explicit
>> deallocation instructions, but that's trivial.
> In my case it saves time the other way around, I consider correct usage 
> trivial, but the typing all the time...

I guess you haven't had to chase many bugs related to missing free's
(though those have gotten easier to find with modern free/alloc tools)
or a reference through a free'd pointer. I can type free(mem) an awful
lot of times in the time it takes to read through the stack trace from
the first crash related to one of those bugs.

>> Ok, so it's only the skill level of the programmers that's the cause
>> of the changes. So why does the language offer bad choices to the
>> programmers?
> Who are "the programmers" to you? And what is a bad choice?

The programmers in this case are the people who write code in the
language under discussion. A bad choice is the one that skilled coders
don't make. TOOWTDI makes the right choice obvious to even the least
skilled programmers, and makes wrong choices painful. TMTOWTDI makes
wrong choices - or ugly code - easy. Which is one of the reasons that
multiple nearly identical constructs is a bad design.

>> That's as silly as a language having garbage collection
>> and alloc/free. Good programmers won't use the latter.
> Good programmers in your opinion. A really good programmer would use 
> alloc/free, if garbage collection works as it does with Java, in those 
> cases it's better.

So the jvm implementations you're familiar with have really bad
garbage collectors. A good programmer won't immediately abandon either
Java or garbage collection. They'd check out other implementations of
the jvm to see if one of those has a better garbage collector. Failing
that, they'd check out other languages to see if one of them might
have a garbage collector that will perform adequately to the problem
at hand - assuming such is politically feasible. After that, they'd
begin to consider alternatives to garbage collection. Explicit
alloc/free is one possibility. A stack-based allocation scheme is
another. There are probably others as well. You can't simply tag one
as "better" without knowing what the problem domain is.

>>> Which Perl? ActiveState Perl does indeed come with HTML, and XML 
>>> parsers, SMTP, etc, clients. Web server(s), I have no idea, haven't 
>>> needed a Perl webserver, I doubt it comes with AS Perl.
>> Sure, anyone can bundle whatever they want up as a distribution, but
>> that doesn't mean those things are part of the base library. The
>> original contention which caused your reaction was that Python came
>> with a larger base library than Perl does. It seems that this claim is
>> still true even if you use the ActiveState distribution of Perl.
> I have no idea. Which modules do you miss in Perl that come with Python?

I already pointed out some modules that come with Python that Perl (as
installed by my system packaging system) doesn't come with.  A quick
check shows that it still doesn't come with mail-handling modules -
parsing mailboxes, parsing mail messages, and sending mail via smtp. I
tend to use those on a regular basis. I'm sure I can find them in CPAN
if I really need them, though.

>>>> That's odd - all the
>>>> packages I see seem to want to install those things from CPAN.
>>> Is there such a centralized place for libraries for Python?
>> Unfortunately, no. PyPI is the one linked to from the web site. It
>> doesn't have CPAN's auto-install capabilities
> So instead of the ability to install a Perl module with just a few lines 
> of typing, one has to eh... what? Use google? Ask around?

Personally, I check PyPI, and a few other sites. Google helps at
times. If all else fails, I ask on c.l.python.

>>> So it seems I am right: the overwhelming effect of "many ways" is
>>> mainly seen by absolute beginners, who are able to make up many ways,
>>> even if there is just one or two :-D.
>> Are you afraid to answer the question? Do you or do you not use the
>> "foreach" loop in perl? Until you do, I can't know why my asking that
>> question makes you call my perl experience into question.
> I haven't been using *foreach* for quite some time, I use *for* all the 
> time. Which is just because I am lazy.

You make my case for me. You write in a subset of Perl that excludes
"foreach". Is that the "absolute beginner" or the "beginner" subet?
Or maybe it's a subset that doesn't depend on the skill level of the
programmer.

>>> Perl 4? Even Perl 5 is almost 11 years old. Which version of Perl 5
>>> are you talking about?
>> Yup - I was using Perl back when it was at version 3. The currently
>> installed Perl is 5.8.5.
> You used Perl 3!?? LOL! For what? To write poetry? I mean, if you used 
> version 3, and you still make extremely basic mistakes...

No, I wrote systems adminstration utilities in Perl 3. I wrote web
application in Perl 4. I just maintain Perl 5. Your "basic mistakes"
was forgetting the warts on strip. BFD.

>>>>>> Right - Perl makes writing ugly,
>>>>> Nope, the programmer does that.
>>>> No, the programme writes the ugly code. Perl makes it easy.
>>> So, and who is to blame? Would you trust a programmer who can only
>>> write code in a certain way because he is restricted by the langauge
>>> to do so? 
>> Which would you trust more - a programmer who had to unlearn all his
>> bad habits, or one who never had the chance to develop them?
> Neither, and think about that for some time.

So you write all your code yourself, and don't avail yourself of Perls
best feature - CPAN?

>>> No. If this was crossposted in a Perl group, by now quite a lot of 
>>> people would have pointed you out, probably in a less nice way, that 
>>> your Perl skills are of a person who hasn't even gone beyond the
>>> first few chapters of "Learning Perl". 
>> Oh, bullshit. I admit my perl skills are rusty - that comes from
>> having found a language that is superior to it across a large
>> collection of problem domains. I never read "Learning Perl". It didnt'
>> exist when I learned Perl.
> So you got stuck with Perl 3 somehow?

I got stuck with the latest version of Perl that was available. It was
a major improvement over shell scripts. That's not saying a lot, even
today - and shell scripting has improved since then.

>> Even if it is true, the point still stands - Perl programs are less
>> maintainable than Python programs. I maintain that the difference in
>> philosphy on the number of ways to do things is a cause for that.
> But to me, you don't sound qualified to make that statement, your Perl 
> skills are, well, rusty.

Ok, ask in both groups. See how many people you find that maintain
both who feel that each is better. I'm positive you'll find the
majority who do both find Python programs more maintainable.

>>> And a bad programmer will go at great length explaining how bad the 
>>> tools are, because he has to learn them :-D
>> A good programmer will compare the toolset to others he's familiar
>> with,
> which only can be done when he/she knows both (almost) equally well.

Nope. A quick survey of a toolset is all that's needed to make a first
approximation as to it's quality - to someone who's familiar with
enough toolsets, anyway.

>> and choose the toolset that is best for the jobs he does. An
>> evangelical programmer will then spend a lot of effort explaining why
>> one toolset is better than another.
> without a good understanding of the other toolset, yup.

A good understanding of toolset design allows you to point out flaws
in a toolset without becoming intimately familiar with it. For
instance, mutliple nearly identical ways to express the same construct
is always a flaw in a toolset. Which has been the point I've been
making the whole time.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From fredrik at pythonware.com  Fri Apr  8 13:11:37 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 19:11:37 +0200
Subject: redirect stdout
References: <loom.20050408T184916-520@post.gmane.org>
Message-ID: <d36drl$p9l$1@sea.gmane.org>

Neal Becker wrote:

> I'd like to build a module that would redirect stdout to send it to a logging
> module.  I want to be able to use a python module that expects to print
> results using "print" or "sys.stdout.write()" and without modifying that
> module, be able to redirect it's stdout to a logger which will send the
> messages via datagrams to a server.

if you want to redirect sys.stdout, replace sys.stdout with an object that
does the redirection.  all it needs is a "write" method:

    import sys

    class myredirector:
        def write(self, x):
            sys.stderr.write("*** " + repr(x) + "\n")

    sys.stdout = myredirector()

    print "hello"
    sys.stdout.write("world")

prints

    *** 'hello'
    *** '\n'
    *** 'world'

</F> 





From m_tach at yahoo.com  Tue Apr 12 12:37:40 2005
From: m_tach at yahoo.com (m_tach at yahoo.com)
Date: Tue, 12 Apr 2005 18:37:40 +0200
Subject: problem with the logic of read files
Message-ID: <68da8$425bf954$43461874$29054@nf1.news-service.com>

I am new to python and I am not in computer science. In fact I am a biologist and I ma trying to learn python. So if someone can help me, I will appreciate it.
Thanks


#!/cbi/prg/python/current/bin/python
# -*- coding: iso-8859-1 -*-
import sys
import os
from progadn import *

ab1seq = raw_input("Entrez le r?pertoire o? sont les fichiers ? analyser: ") or None
if ab1seq == None :
    print "Erreur: Pas de r?pertoire! \n"
"\nAu revoir \n"
    sys.exit()

listrep = os.listdir(ab1seq)
#print listrep

extseq=[]

for f in listrep:
     if f[-4:]==".Seq":
         extseq.append(f)
#         print extseq      

for x in extseq:
     f = open(x, "r")
     seq=f.read()
     f.close()
     s=seq

def checkDNA(seq):
    """Retourne une liste des caract?res non conformes ? l'IUPAC."""

    junk=[]
    for c in range (len(seq)):
        if seq[c] not in iupac:
            junk.append([seq[c],c])
            #print junk
            print "ATTN: Il y a le caract?re %s en position %s " % (seq[c],c)
        if junk == []:
             indinv=range(len(seq))
             indinv.reverse()
             resultat=""
             for i in indinv:
                 resultat +=comp[seq[i]]
             return resultat

seq=checkDNA(seq)
print seq


#I got the following ( as you see only one file is proceed by the function even if more files is in extseq

['B1-11_win3F_B04_04.ab1.Seq']
['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq']
['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq', 'B1-18_win3F_D04_08.ab1.Seq']
['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq', 'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq']
['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq', 'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq', 'B1-19_win3F_F04_12.ab1.Seq']
..
['B1-11_win3F_B04_04.ab1.Seq', 'B1-11_win3R_C04_06.ab1.Seq', 'B1-18_win3F_D04_08.ab1.Seq', 'B1-18_win3R_E04_10.ab1.Seq', 'B1-19_win3F_F04_12.ab1.Seq', 'B1-19_win3R_G04_14.ab1.Seq', 'B90_win3F_H04_16.ab1.Seq', 'B90_win3R_A05_01.ab1.Seq', 'DL2-11_win3F_H03_15.ab1.Seq', 'DL2-11_win3R_A04_02.ab1.Seq', 'DL2-12_win3F_F03_11.ab1.Seq', 'DL2-12_win3R_G03_13.ab1.Seq', 'M7757_win3F_B05_03.ab1.Seq', 'M7757_win3R_C05_05.ab1.Seq', 'M7759_win3F_D05_07.ab1.Seq', 'M7759_win3R_E05_09.ab1.Seq', 'TCR700-114_win3F_H05_15.ab1.Seq', 'TCR700-114_win3R_A06_02.ab1.Seq', 'TRC666-100_win3F_F05_11.ab1.Seq', 'TRC666-100_win3R_G05_13.ab1.Seq']

after this listing my programs proceed only the last element of this listing (TRC666-100_win3R_G05_13.ab1.Seq)

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTCCCGAAGTGTCCCAGAGCAAATAAATGGACCAAAACGTTTTTAGAATACTTGAACGTGTAATCTCATTTTAA




From drichert at calarts.edu  Sun Apr 17 20:12:40 2005
From: drichert at calarts.edu (Dan Richert)
Date: Sun, 17 Apr 2005 17:12:40 -0700
Subject: terminal shutdown
Message-ID: <4262FB78.1050209@calarts.edu>

i wrote a script that accesses files at random from the locatedb 
database.  it then prints a random line from the file it's accessed to 
the terminal screen.  this runs continuously and at times makes the 
terminal behave strangely (chaning font colors, output writing over 
itself on the screen, etc) -- i like this strange behavior, but the 
behavior i don't like is when the terminal window closes on its own.  i 
suspect that the script isn't crashing, but that characters are being 
displayed that interrupt terminal somehow.   i'm on mas os x.   any help 
on this would be greatly greatly appreicated.

thanks,
dan


From __peter__ at web.de  Wed Apr 13 05:09:10 2005
From: __peter__ at web.de (Peter Otten)
Date: Wed, 13 Apr 2005 11:09:10 +0200
Subject: A command in a String ?
References: <pan.2005.04.13.08.25.53.59804@optushome.com.au>
	<mailman.1820.1113381375.1799.python-list@python.org>
	<pan.2005.04.13.08.52.50.894039@optushome.com.au>
Message-ID: <d3injf$peq$00$1@news.t-online.com>

Peter Moscatt wrote:

> Thanks for the help on this.??Yea?the?'exec'?did?the?trick.
> The second example just placed all the strings in one option button.

Peter, you most certainly do *not* need an exec statement. If you take the
time to explain what you want to do (as opposed to how you want to do it) a
bit more exhaustively, perhaps with some context code, the profit will be
all on your side.

Peter



From mage at mage.hu  Sat Apr 23 12:24:05 2005
From: mage at mage.hu (Mage)
Date: Sat, 23 Apr 2005 18:24:05 +0200
Subject: Python or PHP?
In-Reply-To: <IFEpEp.7Gz@bath.ac.uk>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>	<mailman.2344.1114264376.1799.python-list@python.org>
	<IFEpEp.7Gz@bath.ac.uk>
Message-ID: <426A76A5.2050906@mage.hu>

Tim Tyler wrote:

>Mage <mage at mage.hu> wrote or quoted:
>
>  
>
>>check this: http://wiki.w4py.org/pythonvsphp.html
>>    
>>
>
>Good - but it hardly mentions the issue of security - which seems
>like a bit of a problem for PHP at the moment.
>  
>
I don't think so. Bad programmers are able to write bad programs in any
language. Maybe there are more bad php programmers than python
programmers and the 70% of the dynamic world wide web is copied from
user comments in the php.net/manual. However one of the worst cases is
the sql injection attack. And sql injections must be handled neither by
php nor by python but by the programmer.

I think a website or even a large portal is a well constructed database
with triggers and stored procedures and some "echo", "if", "foreach" and
"while" in the php code.

To me the advantage of python seems to come out when you deal with xml,
file handling or when you have to write a native server application for
your website. But I am so new here, others may say other things.

       Mage


From mwm at mired.org  Sat Apr  2 17:44:29 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 02 Apr 2005 16:44:29 -0600
Subject: redundant imports
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<T9OdnU9kdqI2NNffRVn-ow@powergate.ca>
	<i4V2e.1146141$35.42440149@news4.tin.it>
Message-ID: <86zmwgx0he.fsf@guru.mired.org>

"max(01)*" <max2 at fisso.casa> writes:

> Peter Hansen wrote:
>> max(01)* wrote:
>>
>>> hi everybody.
>>>
>>> suppose that code-1.py imports code-2.py and code-3.py (because it
>>> uses names from both), and that code-2.py imports code-3.py.
>>>
>>> if python were c, code-1.c should only *include* code-2.c, because
>>> the latter in turns includes code-3.c.
>>>
>>> inclusion of modules in c is a purely preprocessing textual matter
>>> (compilation is deferred to after the fact), i guess, so that such
>>> things are possible. import of modules in python is a different
>>> beast, so the "redundancy" is (i think) necessary.
>>>
>>> any comment/suggestion/idea?
>> You're mixed up about this whole idea.
>>
>
> that's why i am asking for advice here.
> my concern was motivated by a (clumsy) attempt to understand the
> difference of mechanism between the approach to modular programming in
> a more "traditional" language (c) and python.

[Names changed to be valid python module names.]

I feel I ought to point out that you don't really *have* to import the
code_3.py in code_1.py. You can get to things code_3.py in code_1.py
as code_2.code_3.<thing>.

The semantic behavior of "include" in C is the same as "from module
import *" in python. Both cases add all the names in the included
namespace directly to the including namespace. This usage is
depreciated in Python, because it leads to problems figuring out where
a specific variable came from. In C, it creates a problem called "name
space pollution". This is the case when a file1.c gets all the symbols
for some_header.h, even though it doesn't include/need those symbols,
because some header file1.c included needed a symbol from
some_header.h. This is especially galling if the pollution collides
with some_header2.h that file1.c actually needs.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From jerf at jerf.org  Tue Apr 26 15:00:09 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 15:00:09 -0400
Subject: What's do list comprehensions do that generator expressions
	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
	<426ddda7.553554359@news.oz.net> <861x8ynha0.fsf@guru.mired.org>
Message-ID: <pan.2005.04.26.19.00.09.647300@jerf.org>

On Tue, 26 Apr 2005 02:12:07 -0500, Mike Meyer wrote:
> Right. But that shouldn't be hard to do. Let genexp stand for a a
> generator expression/list comprehension without any brackets on it at all.
> Then [genexp] is the syntax to expand the list. [(genexp)] is the syntax
> to create a list of one element - a generator object. foo(genexp) will do
> the right thing.

In other words, everything as it is today, only with different
implementations under the hood. :-)

Rolling back around to the original point, I don't see any reason to ban
[x for x in thing], changing current practice, when it is so easy to keep
it. [(x for x in thing)] is also current practice (perhaps "bad style" in
some sense, but definately possible in 2.4), and I don't think there is a
good reason to change that, either.


From gsakkis at rutgers.edu  Fri Apr  8 23:40:15 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 8 Apr 2005 20:40:15 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>
	<mailman.1596.1113015264.1799.python-list@python.org>
Message-ID: <1113018015.535852.53250@z14g2000cwz.googlegroups.com>

> <boiled down version of George's exmaple>

I'm not sure if it was clear to you, but my problem is the dummy
WorldModel_v1.MovableObject class. It doesn't do anything by itself,
but it has to be in the inheritance chain to make its descendants work
properly.

> Are you using the *_v1 naming convention for backwards compatibility?
> Backwards compatibility is a giant pain in the ass, I notice you are
> posting from a .edu address so if this is just something you are
working
> on by yourself or in a small group drop the versioning aspects from
the
> code.

Sure, if there was a single version there would be no need for this
post, but that's not the point; backwards compatibilty is part of the
sad reality. I'm trying to write a client for a framework that has gone
through 9 protocol version changes so far and now goes for the 10th.
There are 5-7 different game object classes, so this makes 50-70
classes overall for the ten versions. Most of them would be dummy like
the WorldModel_v1.MovableObject in the example. So the candidate
solutions so far are:
1. Write the dummy classes by hand.
2. Generate them on the fly using some metaprogramming technique
(introspection/metaclass/?)
3. Find an appropriate design pattern that avoids the need for the
dummy classes.

Any ideas for (2) or (3) ?

George



From pgmoscatt at optushome.com.au  Tue Apr  5 04:18:50 2005
From: pgmoscatt at optushome.com.au (Pete Moscatt)
Date: Tue, 05 Apr 2005 18:18:50 +1000
Subject: Placing Toplevel over the parent ?
Message-ID: <4252492b$0$5839$9a6e19ea@news.newshosting.com>

When calling a dialog box using the Toplevel widget, how do I place it over
the calling parent ?

Currently when I call the dialog it appears to the side of the calling
parent.

Pete



From anthra.norell at tiscalinet.ch  Fri Apr  8 18:50:14 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Sat, 9 Apr 2005 00:50:14 +0200
Subject: __iadd__ and __isub__ map to += and -= but don't return result
Message-ID: <000e01c53c8d$540b2900$0201a8c0@mcuf7>

I see! It's the in-place aspect that led me to assume that the assignment to self inside the method would do the trick. Next the explicit call reinforced the perception. Anyway, thank you very much for the clarification.
Frederic

> Anthra Norell wrote:
> 
>> If I am missing a point here, what could it be?
>
> the documentation?
>
>> class Vertex (list):
>>    def __init__ (self, *coordinates): self [:] = list (coordinates [0:2])
>>    def __add__ (self, V):  return Vertex (self [X] + V [X], self [Y] + V [Y])
>>    def __iadd__ (self, V): self [X] += V [X]; self [Y] += V [Y]
>
>> >>> V1 += V2      # ***
>> V1                # ***
>>                   # *** died ?
>> >>> print V1
:> None              # *** V1 died !
>
> if you leave out the return statement, Python automagically inserts a "return None"
> at the end of your method.
>
> and the __iadd__ documentation says:
>
>   These methods are called to implement the augmented arithmetic operations
>    (+=, -=, *=, /=, %=, **=, <<=, >>=, &=, ^=, |=). These methods should
>    attempt to do the operation in-place (modifying self) and return the result
>    (which could be, but does not have to be, self).
>
> in other words, it works exactly as documented.  you return None, you get None.
>
> </F> 
>
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
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From jobs at solidodesign.com  Sat Apr 16 16:40:11 2005
From: jobs at solidodesign.com (Solido Design Automation Jobs)
Date: 16 Apr 2005 13:40:11 -0700
Subject: Software Development Jobs
Message-ID: <d06eca1f.0504161240.4a3be37c@posting.google.com>

Software Developer
------------------

Responsibilities:
You will be a key member of a project team to develop and deliver core
modules of a breakthrough product in a venture capital backed start-up
company in the electronic design automation (EDA) industry. You will
be responsible for defining, designing and implementing complex
software. You will be participating in the decision-making for product
features and the software life-cycle. You will be expected to take a
greater leadership role as the company grows.

Qualification Musts:
-BSCS, BSEE or Masters in Computer Science/Electrical Engineering 
-Software development experience on Linux, HP, or Sun 
-Experience in object oriented (OO) software design and implementation
-Excellent problem solving skills 
-Strong leadership and written/verbal communication skills; team
player

Qualification Pluses:
-Languages: Python, C/C++, Matlab, Cadence SKILL 
-Experience setting up and working within a development methodology
and environment for commercial Linux/HP/Sun software
-Experience in agile software development methodologies 
-Software testing methodology and tools, and quality assurance (QA) 
-Understanding of microelectronic circuits 
-Experience with SPICE-like simulator interfaces 
-Experience with Cadence, Mentor and/or Synopsys / Avanti analog EDA
tools
-GUI development experience 

Job Location:
Saskatoon, Saskatchewan, Canada.

Deadline:
ASAP

To apply:
Email resume to jobs at solidodesign.com , subject: PNG Software
Developer Application


From DoubleMPi at Netscape.com  Fri Apr  1 20:50:26 2005
From: DoubleMPi at Netscape.com (Mike Moum)
Date: Sat, 02 Apr 2005 01:50:26 GMT
Subject: Installing Python on a Windows 2000 Server
Message-ID: <CTm3e.2461$tI6.928@fe2.columbus.rr.com>

Hi,

I'm a civil engineer who also doubles as chief programmer for technical 
applications at my company. Most of our software is written in Visual 
Basic because our VP in charge of I.T. likes to have "consistency", and 
at the moment we're a Microsoft shop. He has assigned me the task of 
developing an new application, the exact nature of which is not 
important for my question. I told him that, in my opinion, that Visual 
Basic was not the best choice for developing this application, and that 
I wanted to use Python. After a bit of discussion of the pros and cons, 
he said to go ahead. I managed to keep my jaw from hitting the floor. :>)

We have a central server array running Windows Server 2000 (I think 
that's the right name; networking is not my specialty, but it's 
definately Windows). Some of our workstations run Windows 2000; others 
run Windows XP Pro. I would like to install Python on the server, and 
run the application that I'll be developing from the workstations, 
without having to install any Python components on the workstations 
themselves. In other words, the Python executable, and the various 
libraries, dll's, and what have you, as well as the application that I'm 
developing, should all reside on the server. The only thing on the 
workstations would be a shortcut to myapplication.py.

Does anyone know whether it is possible to do this? I've done some 
Google searching, with no conclusive results, and poked about on 
python.org, but haven't really been able to find anything. Normally I'd 
be happy to just try it out and see what happens, but we're breaking new 
ground here (this is an amazingly big step for our hide-bound IS 
department!), so I'd like everything to go as smoothly as possible.

TIA,
Mike


From tim.peters at gmail.com  Tue Apr  5 15:42:52 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 5 Apr 2005 15:42:52 -0400
Subject: IronPython 0.7 released!
In-Reply-To: <acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
Message-ID: <1f7befae05040512422ef693d4@mail.gmail.com>

[Thomas Gagne]
> Does the Python community think Microsoft's embrace is a good or bad thing?

All things in this world unfold exactly according to Guido's secret
Master Plan.  So it depends on whether you think Guido is good or bad.
 Members of the Python community are required to think Guido is good. 
Therefore all things that happen in this world are good.

I know, it takes a bit of practice to truly believe that <wink>.

not-mentioning-that-i-don't-feel-particularly-embraced-yet-ly y'rs  - tim


From tpherndon at gmail.com  Fri Apr 15 18:20:43 2005
From: tpherndon at gmail.com (Peter Herndon)
Date: Fri, 15 Apr 2005 18:20:43 -0400
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <42603197.9090002@egenix.com>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>
	<42603197.9090002@egenix.com>
Message-ID: <3a48a11f05041515206406cf50@mail.gmail.com>

Marc-Andre, I apologize for knocking against something that is part of
your livelihood, I hadn't thought about that aspect before I posted. 
In my experience though, adodbapi was much faster.  However, I have
done no benchmarks, my situation is likely pathological, and I
wouldn't be able to build objective benchmarks anyway, so take it with
a huge grain of salt.

For what it is worth, my experience is as follows:  Using a PIII
550MHz, 256MB RAM, running WinNT 4.0 and Python 2.3.4 and connecting
to a Sybase Adaptive Server Anywhere 8.0 database, mx.ODBC took
approximately 8 wall-clock seconds to connect, while adodbapi took
about 2 seconds to connect.  That timing is a guesstimate on my part,
based on me counting.  The only thing changed in the script was the
driver import and the connect string.  Likewise, a query that would
need to search a table with a full data scan on the columns in the
where clause (vendor doesn't believe in indexes), where the table has
20k - 30k rows, takes 30-60 seconds using mx.ODBC versus 15-30 seconds
using adodbapi.

A different application, connecting to MSSQL2K, also exhibited similar
tendencies.  mx.ODBC took a bit longer to connect than adodbapi,
though the differences were *much* smaller.  Not measurable by
guesstimation, but a tad longer.

Again, this is just my experience, and my situation is not likely to
match others'.  Given other circumstances, I would expect the results
to differ, and I encourage the original poster to test all possible
solutions to find the one that best fits his needs.

---Peter Herndon

On 4/15/05, M.-A. Lemburg <mal at egenix.com> wrote:
> Peter Herndon wrote:
> > Another option is adodbapi, which in my experience is much faster than
> > mx.ODBC.
> 
> Much faster ?
> 
> See http://www.microsoft.com/technet/prodtechnol/windows2000serv/technologies/iis/reskit/iischp7.mspx
> and scroll down to Table 7.1:
> 
>       Table 7.1 TPS (transactions per second) Per Number of Threads by MDAC Technology
>       Threads   1       2       5       10      20      50
>       ODBC      66.37   146.28  350.46  626.76  900.24  859.91
>       OLEDB     67.30   141.92  326.19  590.57  794.91  715.78
>       OLEDB 2.0 61.73   126.93  297.29  506.75  575.35  526.61
>       ADO 2.0   51.24   108.12  240.91  377.30  361.26  310.34
> 
> > You can find it at http://adodbapi.sourceforge.net , and it
> > is Windows-only.  There's also http://pymssql.sourceforge.net, which is
> > cross-platform using FreeTDS and unixodbc on *nix.  I haven't any
> > experience with it, though.
> 
> --
> Marc-Andre Lemburg
> eGenix.com
> 
> Professional Python Services directly from the Source  (#1, Apr 15 2005)
> >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
> >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
> >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
> ________________________________________________________________________
> 
> ::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,FreeBSD for free ! ::::
>


From prasad413in at gmail.com  Mon Apr 18 17:31:54 2005
From: prasad413in at gmail.com (hue)
Date: 18 Apr 2005 14:31:54 -0700
Subject: Parse command line options
In-Reply-To: <slrnd66rv7.9jg.klaus@main.szn.dk>
References: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>
	<slrnd66rv7.9jg.klaus@main.szn.dk>
Message-ID: <1113859914.705014.39940@g14g2000cwa.googlegroups.com>

Thanks for your reply, I have used some of your ideas in my Code.



From rkern at ucsd.edu  Tue Apr 19 03:18:50 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 19 Apr 2005 00:18:50 -0700
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <b4-dnXP9eNSBM_nfRVn-hg@speakeasy.net>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>	<mailman.2082.1113893816.1799.python-list@python.org>
	<b4-dnXP9eNSBM_nfRVn-hg@speakeasy.net>
Message-ID: <d42b52$pie$1@sea.gmane.org>

Erik Max Francis wrote:
> Fredrik Lundh wrote:
> 
>> did you check that link before you posted it?
> 
> 
> Works here.  Your browser is probably concluding the trailing . is part 
> of the URL, rather than sentence punctuation :-).

No, Fredrik knows that it works. The OP seemed to be under the 
impression that it didn't (and was posting to propose that it should 
exist and behave as it actually does).

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From pgmoscatt at optushome.com.au  Mon Apr  4 07:21:09 2005
From: pgmoscatt at optushome.com.au (Pete Moscatt)
Date: Mon, 04 Apr 2005 21:21:09 +1000
Subject: Testing for EOF ?
Message-ID: <4251226a$0$5805$9a6e19ea@news.newshosting.com>

I am reasonably new to python and am trying to read several lines of text
from an open file.

Typically in other languages I used to use code like:

while not EOF()
  read_text_in
  ...


How is this achieved with python ?

Regards
Pete



From grante at visi.com  Thu Apr  7 23:06:38 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 08 Apr 2005 03:06:38 -0000
Subject: Sockets
References: <36qb5199613lai084brifj8judpoummv6n@4ax.com>
Message-ID: <115bt9ubqdpvi49@corp.supernews.com>

On 2005-04-08, Dan <dan at dontspammecauseidontlikit.com> wrote:

> But it appears that the Python socket module has no method to send
> binary data, it only sends strings.

Grasshopper, things are often not what they appear.  Likewise,
they often appear to be what they are not. Strings and binary
data are one and the same.

> So there's no argument to tell it the length, it stops when it
> gets the end of string character (null).

Nope. You're thinking of C strings. Python strings aren't
terminated with a null.  A python string can contain 0x00
bytes. Think of Python strings as fixed length arrays of octets
(AKA bytes). [I'm talking about "normal" strings.  There are
also unicode strings, but thinking about them will just make
your head hurt.]

You should probably study the "struct" module.  I think that
will answer most of your questions:

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

Since you're doing network stuff, pay particular attention to
the sections on byte order and alignment.  

You never want to use native byte order and alignment on the
wire or on disk.  Even if you think that the two machines will
always be the same, someday they won't be.  You, of course,
won't be there at that point, and somebody will spend a week
and half tacking down the problem and swearing at you.  Been
there, done that -- at least the tracking/swearing part.
Probably the other part too.

-- 
Grant Edwards                   grante             Yow!  There's a lot of BIG
                                  at               MONEY in MISERY if you have
                               visi.com            an AGENT!!


From tiissa at nonfree.fr  Wed Apr 20 15:29:34 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 21:29:34 +0200
Subject: What's the difference between these 2 statements?
In-Reply-To: <3cnmpbF6gnlkhU1@individual.net>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
Message-ID: <4266ad9f$0$14218$636a15ce@news.free.fr>

Reinhold Birkenfeld wrote:
> ATSkyWalker wrote:
> 
>>What's the difference between these 2 statements?
>>
>>If you have a String s="12345"
>>
>>s[len(s)::-1] = "54321"
>>
>>But
>>
>>s[len(s):0:-1] = "5432"
>>
>>Why? What's the difference? What number then can I use as the end of
>>the slice if I were to supply all 3 parameters?
> 
> 
> -1.

-len(s) or less.
-1 will return an empty string.

Actually you start from len(s)-1 (len(s) is not an index in s) and you 
stop when you reach the index specified (or the end). Since -1 is the 
same index as the starting one (-1~>len(s)-1, -2~>len(s)-2, 
-len(s)+1~>0), you end up with an empty string.

Therefore you have to try to reach indices lower (due to the negative 
step) than the minimum valid index of your list in order to reverse it 
fully.


From peter at engcorp.com  Thu Apr  7 18:05:07 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 07 Apr 2005 18:05:07 -0400
Subject: 'Address already in use' when using socket
In-Reply-To: <87wtretghg.fsf@gto.net>
References: <87wtretghg.fsf@gto.net>
Message-ID: <JoCdnX6tyPoIM8jfRVn-3Q@powergate.ca>

Bearish wrote:
> I get 'Address already in use' errors when using sockets.

Generally one can fix this using:

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

where "sock" is the server socket in question.  Do
this prior to attempting to bind to the port.

-Peter


From Bill at SynectixLtd.com  Fri Apr 22 08:19:46 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Fri, 22 Apr 2005 12:19:46 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2108.1113922028.1799.python-list@python.org>
	<d45dh8$ppl$1@sparta.btinternet.com> <4266871c$1@nntp0.pdx.net>
	<d47nog$duk$1@sparta.btinternet.com> <42681686$1@nntp0.pdx.net>
Message-ID: <d4aq52$aqp$1@titan.btinternet.com>

> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> ImportError: No module named SHIP
>>
> Two common problems here:
> 1) There is no file *\SHIP.pyd where * is one entry of sys.path
> 2) The capitalization is not correct.  The file lookup will succeed,
>    but then, when "initSHIP(void)" is hunted for in the module, no such
>    function will be found.  It is kind of surprising to get the funny
>    mix of case-sensitivity and case-insensitivity that results from
>    mixing Python and Windows.  By the way, I might not even have it
>    right here; I simply make everything as if all tests were case-
>    sensitive.
>
> --Scott David Daniels
> Scott.Daniels at Acm.Org

And also Python may be looking for SHIP_d.pyd too (as it is Windows Debug 
version).

Anyway, I am making prgress (but see new thread on IDLE)

Thanks for the help.

Bill 




From postmaster at castleamber.com  Sun Apr 24 02:48:23 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 06:48:23 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
Message-ID: <Xns9642125692F42castleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <postmaster at castleamber.com> writes:
> 
>> Mike Meyer wrote:
>>
>>> John Bokma <postmaster at castleamber.com> writes:
>>> 
>>>> Mike Meyer wrote:
>>>>
>>>>> "Simon John" <simoninusa2001 at yahoo.co.uk> writes:
>>>>> 
>>>>>> I still love Perl, it's a bit of an art form, as "there's more
>>>>>> than one way to do it", whereas Python usually only allows one
>>>>>> way to do it, which may or may not be a better mantra....
>>>>> 
>>>>> The Python mantra leads to 1) less programmer overhead, and 2) 
>> faster
>>>>> improvements in the language.
>>>>> 
>>>>> To be a Perl expert, you have to know which of the many ways to do
>>>>> various things is the fasted under what conditions.
>>>>
>>>> Why?
>>> 
>>> One of the stated conditions for more than one Perl position I've
>>> looked at.
>>
>> That's weird, since some can differ between versions of Perl like for
>> example a map in a void context. And I am sure Python has now and
>> then improvements which make one operation suddenly 10% faster in a
>> new version.
> 
> The things is - it doesn't matter nearly as much in Python. Since
> there's only one obvious way to do most simple things, that's the one
> that most programmers will choose, and that's the one the developers
> will worry about making faster.

Of course the same holds for Perl. I remember thing that got quite 
faster (I made up 10%), which is a map in void context. I guess it was 
done because it's quite easy to do, not because it was on top of the 
"this must be made faster" list :-)

I quickly read over http://www.xml.com/pub/a/2004/03/31/pycon.html

>> So it tells you a lot about the people providing the position ;-)
> 
> Yeah - they expect their people to be on top of such things. I've
> never run across a Python position where knowing which of several ways
> was faster was an important criterion - because there usually aren't
> several ways.

I have no idea about the number of Perl programmers v.s. Python 
programmers, but I can imagine if one wants to hire a Perl programmer 
that one goes at great length to drop the "I downloaded 7 CGI scripts, 
and managed to make them even more insecure" people.

If I had to write a Perl test, a lot of people who *call* themselves 
Perl programmers would fail :-). (I was tested once for Perl, and I was 
shown snippets from badly written source, and had to tell what certain 
things did, which is quite hard if the source is written by people 
clearly knew less of Perl than I do of Python :-) )

I guess that Python suffers less from this, but I am just a beginner 
:-).

>> Again I doubt that. I doubt that if I give 100 old Python programmers
>> a certain computer science problem I will see 100 exactly the same 
>> solutions, which when benchmarked run equally fast.
> 
> Depends on the problem. If it's one of the things for which Python has
> an obvious solution (sort a list; split a string on whitespace; pull
> select list elements based on a criteria of some kind; search a file
> for lines with a given word in them; etc.) you'd get back the same
> answer from almost all of them.

And what makes you doubt it would be different with Perl? :-D

( sort @alist, split ' ', $astring, grep criteria, @list, etc )

> As I've said a number of times, this has changed lately as new
> features have been added without removing their older counterparts.

The only variation I expect for the above Perl solutions is the use of 
(), and the first argument of split. However, the last one might show 
some exotic solutions :-)

>>>>> to do things means developers only have to
>>>>> worry about impact on that way when making improvements, which
>>>>> will speed them up.
>>>> Yeah, Perl programmers are extremely slow ;-)
>>> Nah, they aren't slow. They just have to worry about more things
>>> than the Python developers.
>> Do you have references to this? I would love to see if indeed 100
>> Python programmers do implement, say 5 CS tasks faster compared to
>> 100 Perl programmers, on average.
> 
> I'm talking about the people developing the language, not the ones
> developing in the language. And this is just my impression from
> watching the developers lists.

I have no idea, since I read neither list. I have the idea that Perl is 
indeed more fat, especially since the (too big) number of built in 
stuff, that Python has in libraries (where it should be IMNSHO).

One could say (and should) that the regular expression thingy in Perl is 
a language on its own :-)

>>> If speed
>>> is an issue, you should probably pick a different
>>> algorithm. Well-written Python programs use the C-coded parts of
>>> Python for the time-critical part of the code.
>> Why are those time critical parts not written in Python ;-)
> 
> Because then they'd be slower. A good scripting environment has lots
> of operations available that are coded at a low level. Since this code
> is usually hand-tuned and optimized over time (like the dictionary
> lookup or string operations in Python, or regular expressions in Perl
> - I'm not sure about the RE library in Python), it may well be faster
> than what you'd write in the low level language if you did it
> yourself.

Agreed, I forget to write down that it was a joke. Some time ago someone 
asked that question to me, with the Python relaced with Perl. And I gave 
a similar answer. 

But you probably agree, that if speed is an issue, and the programmer's 
skills are not the issue, that the only thing one can do is code it in a 
different language (probably by another programmer).

>> I know to little about Python, especially about old Python, to have
>> an idea of what you mean. I only saw, quite recently, someones
>> solution to a problem that used 30 lines of Python, and I am sure I
>> could have written it in 3-4. And I doubt that's because he was
>> using, or I was thinking in, new Python
>> :-D.
> 
> Just because there's only one obvious way to do things doesn't mean
> it's obvious to everyone.

My point. Moreover, most skilled Perl programmers (or at least the ones 
I know) fall back to a shared common set of idioms, which probably are 
not always the fastest one (which I consider a good thing)). So to them 
there are often obvious ways to do things. Put them together, and for 
the small problems you gave they very likely will come up with similar 
results.

So restrictions on the number of ways fails for beginners, because: life 
will find a way. And skilled programmers don't need it, because they 
somehow stick together.

> Witness the recent spate of people asking
> for "goto".

I was a witness, moreover I stated my opinion, which in short stated 
that there is nothing wrong with goto as a statement. Keeping a 
statement from a language because beginners don't understand it, and 
write bad code with it, is wrong. Moreover, every time I see some kind 
of protection in a language, I see people who consider them safe, and 
make other, equally bad (or worse) mistakes. (See my other replies in 
this thread regarding the special "protection" PHP has).

You either understand why something is bad at a given moment, or not. If 
a language must make up for the understanding a programmer lacks, 
something is very very wrong.

I doubt that Python needs a goto, since I am sure it has enough "syntax 
sugared" versions of goto to solve most, if not all things that one 
needs a goto for.

I never used goto in Perl, but I do use early return, break, continue, 
last, next. Some are called bad, because they make more then one exit 
point. There was a time I belonged to the same camp, until I discovered 
that my C code started to move off the right of the screen, and all the 
if, else, etc stuff only made it unreadable, moreover:

            }
          }
        }
      }
    }
  }
}

Didn't help either (almost each and every one needed a comment, adding 
more clutter)

>> After 5 years one gets comfortable with most constructions in a 
>> language. I am more often uncomfortable with the way someone
>> translates a problem into code. And there is no way how you can force
>> people with a language that is, to do that the same, not even close.
> 
> Of course not. The best you can do is provide one obvious way to do
> things, and then hope most people find that.

Beginners get lost anyway, experienced programmers don't need it

>>> My Perl evolved from very shell script like (lots of
>>> backticks and passing around the full text of files)
>> I am sure you can do that with Python too.
> 
> That hasn't happened in 9 years of Python.

That was not what I wrote: I am sure one can program that way in Python 
too.

> Some of the idioms have
> changed because the language has changed, but not because my
> perceptions/expectations/etc have changed.

In 9 years? I learned so much in 9 years about programming that I 
probably am ashamed to show Perl code I wrote 9 years back :-) (Even if 
I left out the Perl 4 syntax). Moreover, I think that my current Perl 
code is quite different from 3-4 years back. And no, not all is related 
to the "there are more ways to do things". I changed my mind on certain 
things (mostly style issues), learned new modules (some are really new, 
others I just didn't know about), but also: I learned new programming 
techniques, or other ways to look at a problem, and hence, write a 
different solution (but using the same idioms as 3-4 years back).

>>> to one more
>>> C-like as I used the language. That change was largely driven by
>>> performance concerns as my understanding of the language grew.
>> Yup, in Perl one should program Perl, not bash, not C. Same for
>> Python. 
> 
> Right. But Perl makes it *easy* to program in bash or C while staying
> in Perl, and provides no obvious drawbacks from doing so - all because
> it's trying to be comfortable to sh and C programmers by providing
> ways to do things that those users are comfortable with. Trying to
> write sh or C in Python is painfull, and you usually run into
> problems/drawbacks fairly quickly - because that's not the obvious way
> to do things.

But again, it doesn't keep people who want to do this. And moreover, I 
think beginners are able to write even worse code, wether it provides 
sh/C support or not. Some people are extremely good at inventing their 
own syntax, and ideas of what certain things do (or don't).

Also, Perl borrows a lot of its syntax from C, which Python (as far as I 
have seen) does extremely little, if at all. So it's already easier to 
program C-like in Perl, by design, even if Perl was as "restrictive" as 
Python.

If the current direction of Python means relaxing it a bit, I personally 
think that is a good thing. Sometimes more than one way makes it 
possible to introduce a construction that's well known in another 
language, and turn it into an idiom for the "more than one way" 
language, and hence, teach "new" ideas to people.

And my quick peek at http://www.xml.com/pub/a/2004/03/31/pycon.html 
gives me the impression that the current direction of Python is to make 
such things available (for example more lazy, which I like thanks to my 
functional programming experience :-) )

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


From skip at pobox.com  Wed Apr 20 09:55:16 2005
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 20 Apr 2005 08:55:16 -0500
Subject: XML-RPC -- send file
In-Reply-To: <1113936785.569089.11210@z14g2000cwz.googlegroups.com>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
	<mailman.2118.1113929395.1799.python-list@python.org>
	<1113930209.259905.112850@o13g2000cwo.googlegroups.com>
	<mailman.2122.1113933410.1799.python-list@python.org>
	<1113933767.439552.169130@g14g2000cwa.googlegroups.com>
	<42654e90$0$20628$626a14ce@news.free.fr>
	<1113936785.569089.11210@z14g2000cwz.googlegroups.com>
Message-ID: <16998.24388.631074.392136@montanaro.dyndns.org>


    codecraig> stefan:  i added, "return 1" to my sendFile method on the server...took
    codecraig> care of the error, thanks.

Yes, by default XML-RPC doesn't support objects like Python's None.  As the
error message indicated you have to enable allow_none to permit transmission
of None.

Skip


From jdhunter at ace.bsd.uchicago.edu  Mon Apr 11 10:53:57 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Mon, 11 Apr 2005 09:53:57 -0500
Subject: Gnuplot.py and, _by far_, the weirdest thing I've ever seen on
 my computer
In-Reply-To: <1112798001.228799.305360@g14g2000cwa.googlegroups.com> ("syd"'s
	message of "6 Apr 2005 07:33:21 -0700")
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
	<1112732528.830194.320710@z14g2000cwz.googlegroups.com>
	<mailman.1418.1112762290.1799.python-list@python.org>
	<1112798001.228799.305360@g14g2000cwa.googlegroups.com>
Message-ID: <m3ekdhicu2.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "syd" == syd  <syd.diamond at gmail.com> writes:

    syd> As for matplotlib, I checked it out.  Looks amazing!  I
    syd> really, really like what demos I tried.

    syd> HOWEVER, I could not find a good way to do smoothing.  I like
    syd> the gnuplot bezier smoothing.  This wouldn't be the hardest
    syd> thing in the world to code, but I was a little disappointed.
    syd> If yall have any ideas, bring em on!  :)

What is the gnuplot interface to use smoothing?

When I want to do something like this, I use scipy's interpolate
module and pass the reults to matplotlib for plotting.  


    from scipy import arange, sin, pi, interpolate
    from pylab import plot, show

    t = arange(0, 2.0, 0.1)
    y = sin(2*pi*t)
    tck = interpolate.splrep(t, y, s=0)
    tnew = arange(0, 2.0, 0.01)
    ynew = interpolate.splev(tnew, tck, der=0)
    plot(t, y, 'o', tnew, ynew)

    show()




From siona at chiark.greenend.org.uk  Wed Apr 20 09:10:03 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 20 Apr 2005 14:10:03 +0100 (BST)
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
Message-ID: <tdt*QuzMq@news.chiark.greenend.org.uk>

Raymond Hettinger <python at rcn.com> wrote:
><seberino at spawar.navy.mil>
>> Many people I know ask why Python does slicing the way it does.....
>Python's way has some useful properties:
>
>* s == s[:i] + s[i:]
>
>* len(s[i:j]) == j-i     # if s is long enough

The latter being particularly helpful when i = 0 -- the first n
elements are s[:n] . (Similarly elegantly, although of no
practical significance, s == s[0:len(s)] .)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From trentm at ActiveState.com  Tue Apr 26 17:10:56 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Tue, 26 Apr 2005 14:10:56 -0700
Subject: Progress Bar with urllib2
In-Reply-To: <%vxbe.156302$Nr5.39335@fe2.news.blueyonder.co.uk>
References: <%vxbe.156302$Nr5.39335@fe2.news.blueyonder.co.uk>
Message-ID: <20050426211056.GA12180@ActiveState.com>

> But some of these files are going to be really, really big, and I want
> to get a progress bar going.  I've tried doing a while loop like this:

Here is a little snippet that I use occassionally:

------------------ geturl.py ---------------------------
import os
import sys
import urllib

def _reporthook(numblocks, blocksize, filesize, url=None):
    #print "reporthook(%s, %s, %s)" % (numblocks, blocksize, filesize)
    base = os.path.basename(url)
    #XXX Should handle possible filesize=-1.
    try:
        percent = min((numblocks*blocksize*100)/filesize, 100)
    except:
        percent = 100
    if numblocks != 0:
        sys.stdout.write("\b"*70)
    sys.stdout.write("%-66s%3d%%" % (base, percent))

def geturl(url, dst):
    print "get url '%s' to '%s'" % (url, dst)
    if sys.stdout.isatty():
        urllib.urlretrieve(url, dst,
                           lambda nb, bs, fs, url=url: _reporthook(nb,bs,fs,url))
        sys.stdout.write('\n')
    else:
        urllib.urlretrieve(url, dst)

if __name__ == "__main__":
    if len(sys.argv) == 2:
        url = sys.argv[1]
        base = url[url.rindex('/')+1:]
        geturl(url, base)
    elif len(sys.argv) == 3:
        url, base = sys.argv[1:]
        geturl(url, base)
    else:
        print "Usage: geturl.py URL [DEST]"
        sys.exit(1)
--------------- end of geturl.py ---------------------------


Save that as geturl.py and try running:

    python geturl.py http://example.com/downloads/bigfile.zip


Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From postmaster at castleamber.com  Wed Apr 20 05:53:08 2005
From: postmaster at castleamber.com (John Bokma)
Date: 20 Apr 2005 09:53:08 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
Message-ID: <Xns963E3180496D3castleamber@130.133.1.4>

Mage wrote:

> praba kar wrote:
> 
>>Dear All,
>>
>>   In Python what is equivalent to goto statement
>>
>>  
>>
> You shouldn't use goto in high-level languages.

Nonsense

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


From jepler at unpythonic.net  Mon Apr 11 21:29:08 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 11 Apr 2005 20:29:08 -0500
Subject: help: loading binary image data into memory
In-Reply-To: <d3f6bo$2thb$1@news.wplus.net>
References: <d3f6bo$2thb$1@news.wplus.net>
Message-ID: <20050412012905.GA3486@unpythonic.net>

probably something like this: (untested)
    def make_ftplib_callback(f):
        def callback(block): f.write(block)
        return callback
    img = cStringIO.StringIO()
    retrbinary( "get ???", make_ftplib_callback(img))

Jeff
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From greg at cosc.canterbury.ac.nz  Thu Apr 21 21:29:51 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 22 Apr 2005 13:29:51 +1200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <1114003997.778676.144950@z14g2000cwz.googlegroups.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
Message-ID: <3cr2cqF6locm6U3@individual.net>

beliavsky at aol.com wrote:
> I disagree. Programming languages should not needlessly surprise
> people, and a newbie to Python probably expects that x[1:3] =
> [x[1],x[2],x[3]].

But said newbie's expectations will differ considerably
depending on which other language he's coming from. So
he's almost always going to be surprised one way or another.

Python sensibly adopts a convention that long experience
has shown to be practical, rather than trying to imitate
any particular precedent.

> Along the same lines, I think the REQUIREMENT that x[0] rather than
> x[1] be the first element of list x is a mistake. At least the
> programmer should have a choice

Who says the Python programmer doesn't have a choice?

   class NewbieWarmFuzzyList(list):

     def __new__(cls, base, *args):
       obj = list.__new__(cls, *args)
       obj.base = base
       return obj

     def __getitem__(self, i):
       return list.__getitem__(self, i - self.base)

     # etc...

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From sjmachin at lexicon.net  Sun Apr 17 17:33:18 2005
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 18 Apr 2005 07:33:18 +1000
Subject: Problem with unpack hex to decimal
References: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>
	<d3ueer$avn$1$8302bc10@news.demon.co.uk>
Message-ID: <vkh561p7rm4gedbgqu5lr6r9gjdccbad19@4ax.com>

On Sun, 17 Apr 2005 20:47:20 +0100, "Jonathan Brady"
<nospam at denbridgedigital.com> wrote:

>
><serpent17 at gmail.com> wrote in message 
>news:1113763068.002612.240940 at l41g2000cwc.googlegroups.com...
>> Hello,
>>
>> I was looking at this:
>> http://docs.python.org/lib/module-struct.html
>> and tried the following
>>
>>>>> import struct
>>>>> struct.calcsize('h')
>> 2
>>>>> struct.calcsize('b')
>> 1
>>>>> struct.calcsize('bh')
>> 4
>>
>> I would have expected
>>
>>>>> struct.calcsize('bh')
>> 3
>>
>> what am I missing ?


A note for the original poster: "unpack hex to decimal" (the subject
line from your posting) is an interesting concept. Hex[adecimal] and
decimal are ways of representing the *same* number.

Let's take an example of a two-byte piece of data. Suppose the first
byte has all bits set (== 1) and the second byte has all bits clear
(== 0). The first byte's value is hexadecimal FF or decimal 255,
whether or not you unpack it, if you are interpreting it as an
unsigned number ('B' format). Signed ('b' format) gives you
hexadecimal -1 and decimal -1. The second byte's value is 0
hexadecimal and 0 decimal however you interpret it.

Suppose you want to interpret the two bytes as together representing a
16-bit signed number (the 'h' format). If the perp is little-endian,
the result is hex FF and decimal 255; otherwise it's hex -100 and
decimal -256.

>
>Not sure, however I also find the following confusing:
>>>> struct.calcsize('hb')
>3
>>>> struct.calcsize('hb') == struct.calcsize('bh')
>False
>
>I could understand aligning to multiples of 4,

Given we know nothing about the OP's platform or your platform, "4" is
no more understandable than any other number.

> but why is 'hb' different 
>from 'bh'? 

Likely explanation: the C compiler aligns n-byte items on an n-byte
boundary. Thus in 'hb', the h is at offset 0, and the b can start OK
at offset 2, for a total size of 3. With 'bh', the b is at offset 0,
but the h can't (under the compiler's rules) start at 1, it must start
at 2, for a total size of 4.

Typically, you would use "native" byte ordering and alignment (the
default) only where you are accessing data in a C struct that is in
code that is compiled on your platform [1]. When you are picking apart
a file that has been written elsewhere, you will typically need to
read the documentation for the file format and/or use trial & error to
determine which prefix (@, <, >) you should use. If I had to guess for
you, I'd go for "<".

[1] Care may need to be taken if the struct is defined in source
compiled by a compiler *other* than the one used to compile your
Python executable -- there's a slight chance you might need to fiddle
with the "foreign" compiler's alignment options to make it suit.

HTH,

John



From sabbey at u.washington.edu  Sat Apr 16 20:30:01 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 17:30:01 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <op.spbm2gdqpda12i@localhost>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<op.spbm2gdqpda12i@localhost>
Message-ID: <Pine.A41.4.61b.0504161421540.200502@dante76.u.washington.edu>

peufeu at free.fr wrote:
>
> 	Keep in mind that most of the problems come from the "space is 
> significant" thing, which is IMHO a very good idea, but prevents us from 
> putting code in expressions, like :
>
> 	func( a,b, def callback( x ):
> 		print x
> 	)
>
> 	or does it ? maybe this syntax could be made to work ?

Hmm.  I'd like to think that suite-based keywords do make this example 
work.  One just has to let go of the idea that all arguments to a function 
appear inside parentheses.

> ****************************************
> 	Comments on the thunks.
>
> 	First of all I view code blocks as essential to a language. They are 
> very useful for a lot of common programming tasks (like defining callbacks in 
> an elegant way) :
>
> 	button = create_button( "Save changes" ):
> 		do
> 			self.save()
>
> 	However it seems your thunks can't take parameters, which to me is a 
> big drawback. In ruby a thunk can take parameters. Simple examples :
>
> 	field = edit_field( "initial value", onsubmit={ |value| if 
> self.validate(value) then do something else alert( "the value is invalid" ) } 
> )
> 	[1,3,4].each { |x| puts x }

Thunks can take parameters:

do value in field = edit_field("initial value"):
 	if self.validate(value):
 	 	something
 	else:
 		alert("the value is invalid")

But callbacks are better defined with suite-based keywords:

field = edit_field("initial value"):
 	def onsubmit(value):
 		if self.validate(value):
 			something
 		else:
 			alert("the value is invalid")

> 	This has the advantage that the interface to the thunk (ie. its 
> parameters) are right there before your eyes instead of being buried in the 
> thunk invocation code inside the edit_field.

In the cases in which one is defining a callback, I agree that it would be 
preferable to have the thunk parameters not buried next to 'do'. 
However, I do not consider thunks a replacement for callbacks.  They are a 
replacement for code in which callbacks could be used, but normally aren't 
because using them would be awkward.  Your 'withfile' example below is a 
good one.  Most people wouldn't bother defining a 'withfile' function, 
they would just call 'open' and 'close' individually.

> 	So I think it's essential that thunks take parameters and return a 
> value (to use them effectively as callbacks).
> 	What shall distinguish them from a simple alteration to def(): which 
> returns the function as a value, and an optional name ? really I don't know, 
> but it could be the way they handle closures and share local variables with 
> the defining scope. Or it could be that there is no need for two kinds of 
> function/blocks and so we can reuse the keyword def() :

Right, defining a function with 'def' is different than defining a thunk 
because thunks share the namespace of the surrounding function, functions 
do not:

x = 1
def f():
 	x = 2   # <- creates a new x
g(f)
print x # ==> 1

do g():
 	x = 2
print x # ==> 2 ( assuming 'g' calls the thunk at least once)

>
> 	If you wish to modify def(), you could do, without creating any 
> keyword :
>
> # standard form
> f = def func( params ):
> 	code
>
> # unnamed code block taking params
> func = def (params):
> 	code
>
> 	Note that the two above are equivalent with regard to the variable 
> "func", ie. func contains the defined function. Actually I find def 
> funcname() to be bloat, as funcname = def() has the same functionality, but 
> is a lot more universal.
>
> # unnamed block taking no params
> f = def:
> 	code

I'm confused.  These examples seem to do something different than what a 
'do' statement would do.  They create a function with a new namespace and 
they do not call any "thunk-accepting" function.

> ***************************************************
> 	Comments on the suite-based keywords.
>
> 	Did you notice that this was basically a generalized HEREDOC syntax ?
>
> 	I'd say that explicit is better than implicit, hence...
>
> Your syntax is :
>
> do f(a,b):
> 	a block
>
> 	passes block as the last parameter of f.
> 	I don't like it because it hides stuff.

Yes, it hides stuff.  It doesn't seem to me any worse than what is done 
with 'self' when calling a method though.  Once I got used to 'self' 
appearing automatically as the first parameter to a method, it wasn't a 
big deal for me.

> I'd write :
>
> f(a,b,@>,@>):
> 	"""a very
> large multi-line
> string"""
> 	def (x):
> 		print x
>
> 	Here the @> is a symbol (use whatever you like) to indicate 
> "placeholder for something which is on the next line".
> 	Indentation indicates that the following lines are indeed argument 
> for the function. The : at the end of the function call is there for 
> coherence with the rest of the syntax.
> 	Notice that, this way, there is no need for a "do" keyword, as the 
> code block created by an anonymous def() is no different that the other 
> parameter, in this case a multiline string.
>
> 	This has many advantages.
>
> 	It will make big statements more readable :
>
> 	instead of :
> 	f( a,b, [some very big expression made up of nested class 
> constructors like a form defintion ], c, d )
>
> 	write :
> 	f( a, b, @>, c, d ):
> 		[the very big expression goes here]
>
> 	So, independently of code blocks, this already improves the 
> readability of big statements.

It might be useful in some situations to be able to define suite-based 
arguments by their order rather than their keyword.  But, to me, one of 
Python's strengths is that it avoids special syntactic characters.  So I 
can't say I like "@>" very much.  Perhaps there is another way of allowing 
this.

> 	You could also use named parameters (various proposals):
>
> 	f( a,b, c=@>, d=@> ):
> 		value of c
> 		value of d
>
> 	or :
>
> 	f( a,b, @*> ):
> 		value of c
> 		value of d
>
> 	f( a,b, @**> ):
> 		c: value of c
> 		d: value of d
>
> 	Notice how this mimics f( a,b, * ) and f(a,b, ** ) for multiple 
> arguments, and multiple named arguments. Do you like it ? I do. Especially 
> the named version where you cant' get lost in the param block because you see 
> their names !

I like those ideas, but maybe just leave off the "@>".

f(a,b,c=,d=):
 	c = 1
 	d = 2

f(a,b,*)
 	1
 	2

f(a,b,**)
 	c = 1
 	d = 2

Another problem is that one may create bindings in the suite that should 
not be keywords.  Explicitly defining the keywords would be useful in this 
case too.  For example,

f(a,b,c=,d=):
 	c = [i**2 for i in [1,2]]   # 'i' is temporary
 	d = 2

Here 'i' would not be passed as a keyword argument, because it 'c' and 'd' 
are explicitly defined as the only keyword arguments.

>
> 	Now if you say that def returns the defined function as a value, you 
> don't need a do keyword.
>
> So, for instance :
>
> def withfile( fname, thunk, mode = "r" ):
> 	f = open( fname, mode )
> 	thunk(f)
> 	f.close()
>
> then :
>
> withfile( "afile.txt", @>, "w" ):
> 	def (f):
> 		f.write( something )
>
> Now, you may say that the def on an extra line is ugly, then just write :
>
> withfile( "afile.txt", @>, "w" ):	def (f):
> 	f.write( something )
>
> If you really like do you can make it a synonym for def and then :
>
> withfile( "afile.txt", @>, "w" ):	do (f):
> 	f.write( something )
>
> 	The two ":" seem a bit weird but I think they're OK.
>

Again, there is the problem of a new namespace being created when using 
'def'.  Also, it's annoying to have to use 'def' (even though one could 
just put it on the same line).

>> 'break' and 'return' should probably not be allowed in thunks.  One
>
> 	I do think return should be allowed in a thunk. After all it's a 
> function block, so why ditch useful functionality ?
> 	yield should also be allowed, after all why can a thunk not be a 
> generator ? This would be powerful.


> def withfile( fname, thunk, mode = "r" ):
> 	f = open( fname, mode )
> 	r = thunk(f)
> 	f.close()
> 	return r
>
> val = withfile( "afile.txt", @>, "w" ):
> 	def (f):
> 		f.write( something )
> 		return something
>
> 	Well, it seems I have no more ideas for now.
> 	What do you think about all this ?
>

Well here you're using a type of suite-based keywords, so 'return' is ok. 
Inside thunks I still think 'return' would be confusing.  I don't think 
one can replace thunks with suite-based keywords.

>> The thunk evaluates in the same frame as the function in which it was 
>> defined. This frame is accessible:
>
> 	Hm ?
> 	You mean like a function closure, or that local variables defined 
> inside the thunk will be visible to the caller ?
> 	This might change a lot of things and it becomes like a continuation, 
> are you going to recode stackless ?

I meant that a thunk is not like a function closure.  Variables defined in 
the thunk won't be visible to the caller of the thunk (except through 
tk_frame), but they will be visible to the function surrounding the thunk. 
I made an initial implementation, and it didn't require anything like 
stackless.

-Brian


From rkern at ucsd.edu  Sun Apr 24 23:49:08 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 24 Apr 2005 20:49:08 -0700
Subject: Is this a bug?
In-Reply-To: <116ojvf473dc16b@corp.supernews.com>
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>	<116nfblc10i9340@corp.supernews.com>	<mailman.2422.1114392805.1799.python-list@python.org>
	<116ojvf473dc16b@corp.supernews.com>
Message-ID: <d4hp2a$rl9$1@sea.gmane.org>

Grant Edwards wrote:
> On 2005-04-25, Terry Reedy <tjreedy at udel.edu> wrote:
> 
>>>   According to the language reference,
>>>
>>>     An augmented assignment expression like x += 1 can be
>>>     rewritten as x = x + 1 to achieve a similar, but not
>>>     exactly equal effect. In the augmented version, x is only
>>>     evaluated once.
>>>
>>>   I don't consider the two results you posted "similar".
>>
>>It continues
>>"Also, when possible, the actual operation is performed in-place, meaning 
>>that rather than creating a new object and assigning that to the target, 
>>the old object is modified instead. ...Similarly, with the exception of the 
>>possible in-place behavior, the binary operation performed by augmented 
>>assignment is the same as the normal binary operations.
>>"
>>I take the behavior observed to be the exceptional in-place behavior 
>>referred to.
> 
> 
> I certainly don't see how.  Strings are immutable.  The old
> object can't be modified in-place, so the "in-place" behavior
> is moot.

It's the left-hand-side, in this case a list, that gets modified 
in-place. Whether the right-hand-side is mutable or not is irrelevant.

> In any case, the only difference is supposed to be whether a
> new object is created or an existing object is modified.  The
> two results shouldn't be completely different as shown by the
> OP.  
> 
> Your quote states quite clearly that the binary operation *is
> the same* whether it's spelt a = a + b or a += b.  That is
> simply not true for the example we're discussing.

No, the quote says "with the exception of the possible in-place 
behavior, the binary operation performed by augmented assignment is the 
same as the normal binary operations." This is "in-place" behavior. 
Badly designed "in-place" behavior, yes.

>>But this could certainly be clearer.
> 
> I don't see how that statement has anything to do with the bug
> at hand.

It's a mistake, but it's been in the wild too long to be changed. Thus, 
it should be documented.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From kent37 at tds.net  Sat Apr 30 13:51:52 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 30 Apr 2005 13:51:52 -0400
Subject: Directory in Windows
In-Reply-To: <1114882248.306624.199600@o13g2000cwo.googlegroups.com>
References: <1114882248.306624.199600@o13g2000cwo.googlegroups.com>
Message-ID: <4273c141_1@newspeer2.tds.net>

custard_pie wrote:
> Hi,..I tried to list files in a tree directory using os.path.walk. To
> avoid dirnames fromm being listed i use the os.path.isdir method.
> However, when isdir encounters directories that use spaces in their
> name e.q My Documents it doesn;t recognize them as directories.. Is
> there any solution to this,..pertaining that I want to keep the naming
> of my directories?
> 

That seems unlikely. For example,
  >>> os.path.isdir(r'D:\My Documents')
True

Can you show the code?

Alternatively you might try os.walk() which is a bit easier to use than os.path.walk() and it gives 
you separate lists for files and directories:

  >>> import os
  >>> for dirpath, dirnames, filenames in os.walk('f:/tutor'):
  ...   for file in filenames:
  ...     print os.path.join(dirpath, file)
  ...
f:/tutor\AllTheSame.py
f:/tutor\AppendTimes.bmp
ecc...

Or even easier, use jorendorff's path module which has a walkfiles() method that iterates over files 
directly and gives you path objects to work with:

  >>> import path
  >>> for file in path.path('f:/tutor').walkfiles():
  ...   print file
  ...
f:/tutor\AllTheSame.py
f:/tutor\AppendTimes.bmp
f:/tutor\ArtOfWar.txt
etc...

http://www.jorendorff.com/articles/python/path/

Kent


From tzot at sil-tec.gr  Wed Apr 27 08:59:45 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 27 Apr 2005 15:59:45 +0300
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
	<01os61t4vg97o4seimge9sppqf9shj7pns@4ax.com>
	<86mzrlkkxb.fsf@guru.mired.org>
Message-ID: <723v61p699er30n78ngbm22r77jcson21h@4ax.com>

On Tue, 26 Apr 2005 21:33:52 -0500, rumours say that Mike Meyer
<mwm at mired.org> might have written:

>This is just a little bit tricky. os.remove (on FreeBSD 5-STABLE,
>anyway) throws an OSError exception if it doesn't have permission to
>remove the file, *or* if the file doesn't exist. You have to examine
>the exception for it's value, which is the result of a strerror
>call. I believe that the result of strerror is platform dependent.

Although I don't have experience with FreeBSD, so far checking the
exception's errno args does the job.  Example:

import errno

try:
   ...
except OSError, exc:
	if exc.errno == errno.ENOENT: # file inexistant
      ...
	elif exc.errno == errno.EPERM: # no permissions
      ...
   else:
      raise
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From artur_spruce at yahoo.com  Mon Apr 18 18:23:17 2005
From: artur_spruce at yahoo.com (AdSR)
Date: 18 Apr 2005 15:23:17 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
Message-ID: <1113862997.242449.12330@l41g2000cwc.googlegroups.com>

> Yes, but usually not so much in function arguments but more in
> list-comprehensions or other places where unpacking was useful. I
love the
> feature - I just don't have nested enough data to use it more :)

I use tuple unpacking in its typical uses, it's one of the first
language features I learned about. Somehow it never occurred to me that
you could use it in function arguments this way - I only knew  f(*args,
**kwargs) style in this context. That's what I made the whole fuss
about...

AdSR



From ajikoe at gmail.com  Mon Apr 11 01:50:20 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 10 Apr 2005 22:50:20 -0700
Subject: compound strip() string problem
In-Reply-To: <mailman.1658.1113185832.1799.python-list@python.org>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E8028DC3CA@its-xchg4.massey.ac.nz>
	<mailman.1658.1113185832.1799.python-list@python.org>
Message-ID: <1113198620.825383.129990@f14g2000cwb.googlegroups.com>

use re module instead:

import re
s = "helo world     nice        day"
res = re.split("\s+",s)
print res

result:
['helo', 'world', 'nice', 'day']

Sincerely Yours,
Pujo



From jhargraveiii at msn.com  Fri Apr  8 09:04:49 2005
From: jhargraveiii at msn.com (Jim Hargrave)
Date: Fri, 08 Apr 2005 09:04:49 -0400
Subject: [JIM_SPAM] Microsoft supporting a .NET version of Python...
In-Reply-To: <mailman.1518.1112939619.1799.python-list@python.org>
References: <42560469.8000104@msn.com>
	<mailman.1518.1112939619.1799.python-list@python.org>
Message-ID: <vfedndf54rrsHMvfRVn-ug@comcast.com>

oops - Sorry for the posting.  This wasn't meant for the newsgroup :-)

J




Steve Holden wrote:
> Jim Hargrave wrote:
> 
>> http://www.gotdotnet.com/workspaces/workspace.aspx?id=ad7acff7-ab1e-4bcb-99c0-57ac5a3a9742 
>>
> 
> 
> You really shoud try and get out more:
> 
>   http://www.pycon.org/dc2005/talks/keynote
> 
> regards
>  Steve


From adam_goucher at hotmail.com  Wed Apr 20 10:58:13 2005
From: adam_goucher at hotmail.com (adam)
Date: 20 Apr 2005 07:58:13 -0700
Subject: Python SSL Socket issue
In-Reply-To: <f759d2e6.0504191609.50d5f35a@posting.google.com>
References: <f759d2e6.0504191609.50d5f35a@posting.google.com>
Message-ID: <1114009093.840671.83720@z14g2000cwz.googlegroups.com>

Try

con.connect()

before the first putrequest

-adam



From rkern at ucsd.edu  Mon Apr 11 01:09:25 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 10 Apr 2005 22:09:25 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <d3c88t$r27$1@sea.gmane.org>
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de><mailman.1647.1113160640.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de>
	<d3c88t$r27$1@sea.gmane.org>
Message-ID: <d3d0l5$8s1$1@sea.gmane.org>

Fredrik Lundh wrote:

> I'm not talking about things that absolutely have to be in the Python
> interpreter core; I'm talking about things that *could* be bundled
> with the standard distribution, *without* having to be relicensed,
> or be forever maintained by the CPython developers.
> 
> (the Linux distributors know how to do this: look for good stuff that's
> either actively maintained or simple and solid enough to live for a while,
> make sure the licenses are good enough, bundle the latest and greatest
> version, ship tested versions at regular intervals, update when necessary,
> and pass bugs and patches upstream.  why not use the same approach
> for Python's standard distribution?)

The reason they don't is because making a distribution like this is a 
royal pain in the ass. It makes no sense to make the Python standard 
distribution like this. Only insane people do this. I'm one of them.

"Updating when necessary" is problematic and really requires proper 
package management. Python is not an OS and cannot control all of the 
little factors that make package management feasible for OS 
distributions to do.

What's more, once you *do* have proper package management on the 
platforms that you care about, it doesn't matter what is or isn't in the 
standard distribution. Hopefully, one of the CPyAN dreams will actually 
pan out.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From dmbkiwi at gmail.com  Wed Apr 27 22:10:53 2005
From: dmbkiwi at gmail.com (dmbkiwi at gmail.com)
Date: 27 Apr 2005 19:10:53 -0700
Subject: kdialog and unicode
In-Reply-To: <mailman.2606.1114648134.1799.python-list@python.org>
References: <mailman.2606.1114648134.1799.python-list@python.org>
Message-ID: <1114654253.661827.241090@f14g2000cwb.googlegroups.com>


John Ridley wrote:
> dmbkiwi wrote:
>
> > I'm trying to get python, unicode and kdialog to play nicely
> together.
> > This is a linux machine, and kdialog is a way to generate dialog
> boxes in
> > kde with which users can interact (for example input text), and you
> can
> > use the outputted text in your script.
> >
> > Anyway, what I'm doing is reading from a utf-8 encoded text file
> using the
> > codecs module, and using the following:
> >
> > data = codecs.open('file', 'r', 'utf-8')
> >
> > I then manipulate the data to break it down into text snippets.
> >
> > Then I run this command:
> >
> >>>> test = os.popen('kdialog --inputbox %s' %(data))
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in ?
> > UnicodeEncodeError: 'ascii' codec can't encode character u'\u017a'
in
> > position 272: ordinal not in range(128)
> >
> > I would really like kdialog display the text as utf-8.  However, it
> seems
> > that python is trying to pass the utf-8 encoded data as ascii,
which
> > obviously fails because it can't deal with the utf-8 encoded text.
> Is it
> > possible to pass the text out to kdialog as utf-8, rather than
ascii?
>
> kdialog will accept a limited form of markup as text, including xml
> character escapes. so you should be able to display polish text
> correctly using this method:
>
> >>> import os
> >>> s = """Wszyscy ludzie rodz\xc4\x85 si\xc4\x99
> ...  wolni i r\xc3\xb3wni pod wzgl\xc4\x99dem
> ...  swej godno\xc5\x9bci i swych praw. S\xc4\x85
> ...  oni obdarzeni rozumem i sumieniem i powinni
> ...  post\xc4\x99powa\xc4\x87 wobec innych w duchu
> ...  braterstwa."""
> >>> s = s.decode('utf-8').encode('ascii','xmlcharrefreplace')
> >>> k = os.popen('kdialog --inputbox "<p>%s</p>"' % s)
>
>
> John Ridley
>
> Send instant messages to your online friends
http://uk.messenger.yahoo.com

Interesting - this displays correctly when I run the above code from a
python shell.  However, when I run it as a superkaramba theme (which is
a wrapper interface to some kde functions, but allegedly passes
straight python functions direct to the python interpreter), it shows
up as letters, with &nnn (where nnn is a number) instead of the \xc4
etc.  I need to do some more investigating of this with the
superkaramba developers, and my own machine to see where the problem
lies - clearly it's not in the code I'm using - there's either
something wrong on my machine, or wrong with the way superkaramba
passes this code to the python interpreter.

Thanks for your help.

Matt



From Gerald.Klix at klix.ch  Mon Apr 25 11:11:56 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Mon, 25 Apr 2005 17:11:56 +0200
Subject: regex over files
In-Reply-To: <426D0659.7080307@chamonix.reportlab.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
Message-ID: <426D08BC.1040703@klix.ch>

Map the file into RAM by using the mmap module.
The file's contents than is availabel as a seachable string.

HTH,
Gerald

Robin Becker schrieb:
> Is there any way to get regexes to work on non-string/unicode objects. I 
> would like to split large files by regex and it seems relatively hard to 
> do so without having the whole file in memory. Even with buffers it 
> seems hard to get regexes to indicate that they failed because of buffer 
> termination and getting a partial match to be resumable seems out of the 
> question.
> 
> What interface does re actually need for its src objects?

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634



From roy at panix.com  Wed Apr 13 11:26:49 2005
From: roy at panix.com (Roy Smith)
Date: 13 Apr 2005 11:26:49 -0400
Subject: Codig style: " or """
References: <mailman.1842.1113405204.1799.python-list@python.org>
Message-ID: <d3jdnp$pgg$1@panix2.panix.com>

Sara Khalatbari  <sarapythonlist at yahoo.com> wrote:
>What are the differences between " and """ ? 

The triple-quote form lets you write multi-line quoted strings:

"""This function does a lot of neat stuff.  It takes
many lines of text to describe what it does.

Multiple paragraphs, even.
"""

>To be very honest: I have a very strict boss who looks
>for bugs in my codes & he insists to know exactly
>which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
>my coding style on when using " or """.

Show him PEP-8 (http://www.python.org/peps/pep-0008.html).  PEP-8, in
turn, references a few other style PEPs.  If adopting them wholesale
as authoritative is all you need to keep your PHB happy, go for it.


From pinard at iro.umontreal.ca  Wed Apr  6 16:24:45 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Wed, 6 Apr 2005 16:24:45 -0400
Subject: Best editor?
In-Reply-To: <zmwbkawa.fsf@pobox.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
	<20050406010456.GA31984@alcyon.progiciels-bpi.ca>
	<zmwbkawa.fsf@pobox.com>
Message-ID: <20050406202445.GA30391@alcyon.progiciels-bpi.ca>

[John J. Lee]
> Fran?ois Pinard <pinard at iro.umontreal.ca> writes:
> [...]
> > Overall, Vim is also cleaner than Emacs, and this pleases me.
> [...]

> Is this still true when comparing XEmacs vs. vim? (rather than
> GNU Emacs vs. vim) I've always used GNU Emacs, but I have got the
> impression that XEmacs is (was?) cleaner in some ways.

I have much less experience with XEmacs.  One friend of mine (Horvje) is
quite involved in XEmacs development, and he convinced me to give it a
serious and honest try.  I did, yet never as deeply as I learned Emacs.

My feeling has been that XEmacs, despite cleaner and offering a lot, in
the realm of attractive chrome and original features, is slower overall
and a bit less stable than GNU Emacs (Richard just _hates_ when one
opposes XEmacs to GNU Emacs, and by doing so, involuntarily suggesting
that XEmacs might not be "GNU"!  But I'm not in GNU politics nowadays!
:-). What most discouraged me is that fact that, at the time of my
tries, neither Allout nor RMAIL were supported, both of which I was
heavily using[1].  And also a few other gooddies as well.

I know from users that Pymacs, which allows for Python usage from within
Emacs, is supported in XEmacs just as well as in GNU Emacs.

--------
[1] Now in Vim, I switched from RMAIL to plain `mbox', and now use Mutt
as a mail user agent -- which I find blazingly speedy even on big folders.
For Allout, I rewrote an Allout support for Vim, as I could not
walk away from it -- alternative solutions were too heavy.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From lbates at syscononline.com  Mon Apr 11 09:59:11 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 11 Apr 2005 08:59:11 -0500
Subject: Avoiding DOS Window...
In-Reply-To: <mailman.1676.1113209951.1799.python-list@python.org>
References: <mailman.1676.1113209951.1799.python-list@python.org>
Message-ID: <lbydnb5ikIE2H8ffRVn-tQ@comcast.com>

Andrea,

Take a look at Win32 extensions CreateProcess method.
You can control the window location/size or run
minimized.


win32process.CreateProcess(execute_target,
                           commandLine,
                           processAttributes,
                           threadAttributes,
                           bInheritHandles,
                           dwCreationFlags,
                           newEnvironment,
                           currentDirectory,
                           STARTUPINFO)

Larry Bates



andrea.gavana at agip.it wrote:
> Hello NG,
> 
>       I don't know if this is the right place to post this question, but
> noting that it is os-related probably someone will have some nice idea.
> I have built an application using Python+wxPython, and I have compiled it
> into an exe file using py2exe. In my app, I use a call:
> 
> self.process = os.spawnl(os.P_NOWAIT, MyCommand)
> 
> where MyCommand is a call to an external exe file. When I run my
> application (without the DOS window), a new DOS window is created for every
> call to os.spawnl. This is something I would like to avoid because I don't
> need to have 50 DOS windows opened on my PC. Moreover, I need to keep a
> reference to self.process, because I woule like to be able to kill the
> process when the user decides to kill it. In order to kill it, I use a
> command like:
> 
> if self.process is not None:
>     if wx.Platform == '__WXGTK__':
>         try:
>             status = os.kill(self.process, 9)
>         except:
>             pass
>     else:
>         try:
>             win32api.TerminateProcess(self.process,0)
>         except:
>             pass
>         status = 0
> 
> self.process = None
> 
> I thought I could use os.popen* things, but it seems to me that they do not
> return something that could be killed using os.kill() or
> win32api.TerminateProcess().
> Am I missing something about the os things? Does anyone have a better
> solution?
> 
> Thanks to you all.
> 
> Andrea.
> 
> 
> ------------------------------------------------------------------------------------------------------------------------------------------
>  Message for the recipient only, if received in error, please notify the
> sender and read http://www.eni.it/disclaimer/
> 
> 


From codecraig at gmail.com  Fri Apr 22 10:35:59 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 07:35:59 -0700
Subject: Jython - how much python is it supporting?
Message-ID: <1114180559.089934.192220@l41g2000cwc.googlegroups.com>

I am wondering, how much Python does Jython support?  I ask because I
tried to use xmlrpclib in Jython...but to my surprise it wasn't there.
So, with fingers crossed, I copied xmlrpclib.py from my Python24
directory into my Jython\LIB directory, and wa-la it worked.

Any ideas on what Jython does and does not support?  And, any idea how
I can tell someone about xmlrpclib?

thanks



From peter at engcorp.com  Wed Apr 13 08:53:04 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 13 Apr 2005 08:53:04 -0400
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <d9GdnYjHStB30MHfRVn-pg@powergate.ca>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<20050411194907.1769.17472.XPN@orion.homeinvalid>
	<425AF2FD.2080006@v.loewis.de>
	<20050412191956.1706.59231.XPN@orion.homeinvalid>
	<d9GdnYjHStB30MHfRVn-pg@powergate.ca>
Message-ID: <hu6dnY8pjImpi8DfRVn-1g@powergate.ca>

Peter Hansen wrote:
> The last I recall reading in this forum was that the regular
> distribution is compiled with a copy of the compiler
> *provided by* Microsoft.

On re-reading, I see this might not be clear enough.

By 'provided by' I meant *donated by*, as in given
free (apparently) to the PSF or at least to one of
the core developers for the purpose of compiling
Python itself.  Given the nature of Python, one
might see this as an implicit comment about the
status of the two key DLL files in question and
how concerned Microsoft is (or is not) about their
possible widespread distribution in software whose
authors didn't directly pay MS for the compiler.

A Google search might reveal the message in which
I read that, posted a few months ago I believe.

-Peter


From philippe at philippecmartin.com  Wed Apr 27 11:53:22 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Wed, 27 Apr 2005 15:53:22 GMT
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <SzObe.1144$m85.30@newssvr30.news.prodigy.com>

I really like eclipse + pydev

Regards,

Philippe



monkey wrote:

> Read through python site for programming tool, really plenty of choices
> :-) (For c++, I just can't breath with very very limited choices)
> 
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for
> Eclipse) also worth looking. Actually which one are you guys using? and
> why? I think it is also valuable for those who are new to python as me.



From programmer.py at gmail.com  Wed Apr 27 22:34:08 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Wed, 27 Apr 2005 21:34:08 -0500
Subject: Problem with sending a variable(python) while using html
In-Reply-To: <426ff886$0$13746$ba624c82@nntp03.dk.telia.net>
References: <426fe1f8$0$636$ba624c82@nntp02.dk.telia.net>
	<mailman.2596.1114630252.1799.python-list@python.org>
	<426ff886$0$13746$ba624c82@nntp03.dk.telia.net>
Message-ID: <d52c72d20504271934664c27d6@mail.gmail.com>

On 4/27/05, Hansan <none at bag.python.org> wrote:
> Hi.
> 
> Sorry forgot to post a "non-working" example
> 
> That could be
> print "<a href=script.py?id=", variable,  "'>", "some text"  <input
> type=hidden name="eventid" value='''+str(variable_name)+'''>'''</a>"
> 
> I know that it isnt very creative, but I am having a hard time getting html
> to work together with python.
> 
> When the link "some text" is clicked I want to send both the first variable
> called variable and the second one(variable_name) to the script (script.py)
> 
> Hope that makes some sense :)

Got it - I think :)

# Create a link that passes the value of `variable' to script.py via 
# the id parameter.  You may want to escape `variable' somehow
# in case it contains spaces or something else that isn't valid.
print '<a href=script.py?id="%s"> some text </a>'  % variable

# Create a hidden input variable named `eventid' that contains a value of
# `variable_name'
print '<input type=hidden name="eventid" value="%s">' % variable_name

hth,
jw


From olaamigoquepasa at hotmail.com  Thu Apr 21 05:47:42 2005
From: olaamigoquepasa at hotmail.com (hawkesed)
Date: 21 Apr 2005 02:47:42 -0700
Subject: Dictionary question.
Message-ID: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>

Hi,
  I am semi new to Python. Here is my problem : I have a list of 100
random integers. I want to be able to construct a histogram out of the
data. So I want to know how many 70's, 71's, etc. I can't figure out
how to do this. A dictionary is supposedly can do key value pairs
right? I want to be able to see if say 75 is in the data structure, and
what its value is, then increment its value as I go through the list
finding items.
  I am sure there is a way to do this. Is a dictionary what I should be
using? Thanks for any help. Hope this makes sense, its getting very
late here.
Regards all.
Ed



From grante at visi.com  Mon Apr 25 12:33:53 2005
From: grante at visi.com (Grant Edwards)
Date: Mon, 25 Apr 2005 16:33:53 -0000
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<116q56ie4vqtu04@corp.supernews.com> <d4j51p$rut$1@bagan.srce.hr>
Message-ID: <116q6vhon3g0v37@corp.supernews.com>

On 2005-04-25, Ivan Voras <ivoras at fer.hr> wrote:
> Grant Edwards wrote:
>
>> Huh?  wxPythonGTK requires GTK runtimes as well:
>
> He was probably talking about Windows, where wx toolkit uses native 
> (more or less...) controls.

Ah -- I forgot that GTK was an option under Windows.  The last
time I played with PyGTK was a couple years ago and the Win32
port wasn't done yet.

> But then, installing GTK runtime libraries on Windows is a
> one-click job, there are automated installers for it.

I suppose using native widgets should preserve the look and
feel users are used to.

-- 
Grant Edwards                   grante             Yow!  I had a lease on an
                                  at               OEDIPUS COMPLEX back in
                               visi.com            '81...


From grante at visi.com  Sat Apr  9 13:40:13 2005
From: grante at visi.com (Grant Edwards)
Date: Sat, 09 Apr 2005 17:40:13 -0000
Subject: Help with modem terminal
References: <mailman.1626.1113068222.1799.python-list@python.org>
Message-ID: <115g4rtsg2oi0cf@corp.supernews.com>

On 2005-04-09, Adriano Monteiro <py.adriano at gmail.com> wrote:

> I need to talk to my modem through a terminal, so I can send
> commands and get the answers.

Through a terminal?  Just type on the keyboard and look at the
display.

> Does anybody here know what can I do?

Not unless you can clearly describe the problem.  Do you mean
you want to talk to a modem through a serial port?  If so, then
pyserial is probably what you should try.

-- 
Grant Edwards                   grante             Yow!  ... If I had heart
                                  at               failure right now,
                               visi.com            I couldn't be a more
                                                   fortunate man!!


From ojokimu at yahoo.co.uk  Mon Apr  4 13:53:38 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Mon, 4 Apr 2005 18:53:38 +0100 (BST)
Subject: re module non-greedy matches broken
In-Reply-To: 6667
Message-ID: <20050404175338.76384.qmail@web26806.mail.ukl.yahoo.com>


--- lothar <lothar at ultimathule.nul> wrote:
> how then, do i specify a non-greedy regex
>   <1st-pat><not-1st-pat>*?<follow-pat>
> 
> that is, such that non-greedy part <not-1st-pat>*?
> excludes a match of <1st-pat>
> 
> in other words, how do i write regexes for my examples?
 
Not sure if I completely understand your explanation, but does this get
any closer to what your looking for?

>>> vwre = re.compile("V[^V]*?W")
>>> newdoc = "V1WVVV2WWW"
>>> re.findall(vwre, newdoc)
['V1W', 'V2W']

That is: <pat1>, then <not-pat1> as few times as possible, then <pat2>


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From kent37 at tds.net  Fri Apr 22 11:17:56 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 11:17:56 -0400
Subject: Jython - how much python is it supporting?
In-Reply-To: <1114180559.089934.192220@l41g2000cwc.googlegroups.com>
References: <1114180559.089934.192220@l41g2000cwc.googlegroups.com>
Message-ID: <42691158_1@newspeer2.tds.net>

codecraig wrote:
> I am wondering, how much Python does Jython support?  I ask because I
> tried to use xmlrpclib in Jython...but to my surprise it wasn't there.
> So, with fingers crossed, I copied xmlrpclib.py from my Python24
> directory into my Jython\LIB directory, and wa-la it worked.

If you are using SimpleXMLRPCServer see this message:
http://sourceforge.net/mailarchive/message.php?msg_id=9718762

Kent


From austin at maxtronic.com.tw  Tue Apr 12 23:04:27 2005
From: austin at maxtronic.com.tw (Austin)
Date: Wed, 13 Apr 2005 11:04:27 +0800
Subject: Read the windows event log
Message-ID: <d3i22b$e6p$1@netnews.hinet.net>

My codes are below:

***********************************
import win32evtlog

def check_records(records):
    for i in range(0,len(records)):
        print records[i].SourceName

h = win32evtlog.OpenEventLog(None,"System")
flags = 
win32evtlog.EVENTLOG_BACKWARD_READ|win32evtlog.EVENTLOG_SEQUENTIAL_READ
records = win32evtlog.ReadEventLog(h,flags,0)

print "Total " + str(len(records))
check_records(records)

************************************

The result from my codes are total 2.
But the event log in windows event viewer are 24.
How could I get all events? 




From greg at cosc.canterbury.ac.nz  Thu Apr  7 01:07:40 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 07 Apr 2005 17:07:40 +1200
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
 Flaw
In-Reply-To: <du7zmwcgzh5.fsf@mozart.cc.tut.fi>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<du7zmwcgzh5.fsf@mozart.cc.tut.fi>
Message-ID: <3bjthaF6d00nnU1@individual.net>

>>>>>>"Sunnan" == Sunnan  <sunnan at handgranat.org> writes:

>     Sunnan> It's just that I'm having a hard time matching that quote
>     Sunnan> to what I though python was about. I thought boring code
>     Sunnan> was considered a virtue in python.

There's a difference between unsurprising and boring.
The coffee I drank this afternoon, for instance, did
not surprise me, but I still enjoyed it.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From ktenney at gmail.com  Fri Apr  8 06:54:14 2005
From: ktenney at gmail.com (ktenney at gmail.com)
Date: 8 Apr 2005 03:54:14 -0700
Subject: Best editor?
In-Reply-To: <7a2mcsi6t3u8$.jw7lghv8brwt.dlg@40tude.net>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<7a2mcsi6t3u8$.jw7lghv8brwt.dlg@40tude.net>
Message-ID: <1112957654.626226.103010@o13g2000cwo.googlegroups.com>

Howdy,

I'm sold on out Leo, http://leo.sf.net, pure Python
amazingly easy to learn and powerful.

Based on outlining, it provides a powerful and
flexible way to manage content. Lots of built in
Python code awareness.

Extensible with plugins, a very active community
is making "I wish my editor could ..." come true
every day.

A peek at the SF forum gives an idea of how
active the development pace is
http://sourceforge.net/forum/?group_id=3458

It's different than other editors, I'd suggest trying it.

Thanks,
Kent



From python-url at phaseit.net  Mon Apr 18 17:11:22 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 18 Apr 2005 21:11:22 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 18)
Message-ID: <mailman.2106.1113921228.1799.python-announce-list@python.org>

QOTW: "Darn. I finally say something that gets into Quote of the Week,
and it's attributed to someone else!" -- Greg Ewing (we think)
    http://groups-beta.google.com/group/comp.lang.python/msg/15b836a557afccb2

"If there were something wrong with the API, Guido would have long since
fired up the time machine and changed the timeline so that all would be
as right as rain." - Raymond Hettinger

"Get real.  I can't imagine using anything so complex." -- Scott David
Daniels, in response to a suggestion to try (1j-1) as a counting base

        
    Continuations for Curmudgeons:
        http://www.intertwingly.net/blog/2005/04/13/Continuations-for-Curmudgeons

    Textual watermarks with Python Imaging Library:
        http://www.livejournal.com/users/gniemeyer/10279.html

    The new Python Cookbook is out of date already:
        http://42.blogs.warnock.me.uk/2005/04/oreillycom_onli.html
        
    Thunks for nothing:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/bbb6f71ff27f83a6/282bc755d5be3f62
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6e50601e8b1d8d18/db4f746b8b4d76ea
        
    A tutorial for building a simple to-do list application using WSGIKit, SQLObject, and Zope Page Templates:
        http://wsgikit.org/docs/TodoTutorial.html
        
    What can WSGIKit do for you?
        http://blog.ianbicking.org/what-can-wsgikit-do-for-you.html
        
    The Participatory Culture Foundation's desktop video player - video
    over BitTorrent:
        http://www.participatoryculture.org/
        
    Next-generation distributed version control:
        http://www.bazaar-ng.org/
        
    Will LAMP eclipse Java?
        http://news.com.com/2061-10795_3-5663085.html
        
    Does the fact that Python 2.4 is built using VC++ on Windows give us
    a problem?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/bccb45b7dae7ddd5/7a91ce5a9541221c
        
    Look up IP addresses by country:
        http://www.livejournal.com/users/zestyping/111325.html
        
    Python 2.3.2 for PalmOS:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1d835f30343cabec/4efb02adafe3f7b5
        

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From foo.bar at freesurf.ch.invalid  Sat Apr  2 11:43:02 2005
From: foo.bar at freesurf.ch.invalid (Thomas Rast)
Date: Sat, 02 Apr 2005 18:43:02 +0200
Subject: Performance issue
References: <mailman.1239.1112456748.1799.python-list@python.org>
Message-ID: <87u0mpm8o9.fsf@thomas.local>

Tom Carrick <knyght at gmail.com> writes:

> In my attempted learning of python, I've decided to recode an old
> anagram solving program I made in C++. The C++ version runs in less
> than a second, while the python takes 30 seconds.

Indeed, your program can be improved to run about ten times as fast,
which (on my system, with 96274 entries in /usr/share/dict/words) is
below a second.

In general you should try to move the loops into C code, i.e. use
built-in functions instead of long 'for' blocks.

Some comments on your version:

> import string
>
> # Need a function to convert a string to a list to be
> # able to use the sort() function
> def string2list(s): [snipped]

list() achieves the same thing a lot faster.

> words = []

You do not need to initialize 'words' here, as you're overwriting it a
few lines afterwards.

> found = []
>
> anagram = raw_input("Find anagrams of word: ")
>
> f = open('words.txt', 'r')
> file = f.read()
> f.close()
>
> words = file.splitlines()

Try to avoid assigning to the names of built-in functions if you can.
Names like 'file', 'list', 'dict', 'map' etc. are often an obvious
choice, but overwriting them means that you don't "just" know what a
later use refers to.

> sorted_anagram = anagram.lower()
> sorted_anagram = string2list(anagram)
> sorted_anagram.sort(lambda x, y: cmp(x, y))

Unless you *really* have to, don't use comparison functions with
sort(), as they slow the operation considerably.  In this (as in most)
cases, a plain sorted_anagram.sort() does the trick, and in version
2.4 you can achieve custom sort orders with the optional 'key'
argument.  The sorted() built-in also comes in handy here.

> while words:
>     if len(words[0]) == len(sorted_anagram):
>         wordlist = string2list(words[0])
>         wordlist.sort(lambda x, y: cmp(x, y))
>         sorted_wordlist = wordlist
>         if sorted_anagram == sorted_wordlist:
>             found.append(words[0])
>     del words[0]

Avoid this style of looping at all times!  Removing the first element
of a list is O(n), so looping through the whole list as above is
O(n**2).  In most cases you should use a for loop:

for word in words:
  # do something

which is O(n) of course.  If you do have to loop destructively, pop()
from the end (which is the default) like so:

while words:
  word = words.pop()
  # do something

This is also O(n), because removing the *last* element of a list is
O(1) (amortized; I suppose the implementation will occasionally shrink
the underlying array at linear cost).

> print "Anagrams of " + anagram + ": "
> while found:
>     print found[0] + " "
>     del found[0]

I assume you meant not to print a newline between the words, which
'print' does by default.  The best solution in that case is "
".join(found).

A better version (2.4+ only):

-- 8< -- 8< --
anagram = raw_input("Find anagrams of word: ")

words = open('words.txt', 'r')

sorted_anagram = sorted(anagram.lower())

found = []

for word in words.read().splitlines():
    if len(word) == len(anagram) and sorted(word) == sorted_anagram:
        found.append(word)

print "Anagrams of %s: %s" % (anagram, ' '.join(found))
-- >8 -- >8 --

Interestingly, the length comparison makes quite a difference!  I
removed it at first, thinking it was unnecessary.  Here are some
timings:

* Your original version (for comparison):

  $ time echo stop | python2.4 anagram_slow.py
  [...]
  real    0m9.090s
  user    0m8.790s
  sys     0m0.013s

* Your version, but with the O(n**2) loop replaced by an O(n) 'for':

  $ time echo stop | python2.4 anagram_forloop.py
  [...]
  real    0m0.221s
  user    0m0.134s
  sys     0m0.014s

* My version but with the length comparison removed:

  $ time echo stop | python2.4 anagram_no_lencmp.py
  [...]
  real    0m0.408s
  user    0m0.353s
  sys     0m0.010s

* My version as above:

  $ time echo stop | python2.4 anagram_fast.py
  [...]
  real    0m0.144s
  user    0m0.099s
  sys     0m0.008s

Hope that helps :-)

- Thomas

-- 
If you want to reply by mail, substitute my first and last name for
'foo' and 'bar', respectively, and remove '.invalid'.


From francois.lepoutre at caramail.com  Sat Apr 16 08:21:48 2005
From: francois.lepoutre at caramail.com (Francois Lepoutre)
Date: Sat, 16 Apr 2005 14:21:48 +0200
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <mailman.1988.1113604089.1799.python-list@python.org>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>	<mailman.1957.1113568143.1799.python-list@python.org>	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>	<42603197.9090002@egenix.com>
	<mailman.1988.1113604089.1799.python-list@python.org>
Message-ID: <4260ff70$0$7511$79c14f64@nan-newsreader-07.noos.net>

Peter,

May my I apologize for knocking against your information, as well.

 > For what it is worth, my experience is as follows:  Using a PIII
 > 550MHz, 256MB RAM, running WinNT 4.0 and Python 2.3.4 and connecting
 > to a Sybase Adaptive Server Anywhere 8.0 database, mx.ODBC took
 > approximately 8 wall-clock seconds to connect

As a long time user of the ASA range of products, I was surprised
by your connection time to ASA 8. I'm not a regular user of mxODBC
but i have tested it with success here. With no pending time upon
connection whatever the middleware.

The script below ran fast on my machine (an oldish pentium 400)
with ASA 8.0.2 (the engine is local).

When re-cycling ASA connection (a good practice) the script took
0.21 sec. to run and  3.4 sec. when re-building the connection
on every hit (which you should avoid).

For 100 connections, not one! Which confirms my feeling that
something got in the way when you ran your test.

mxODBC is fast and safe (on both linux and win32).

I won't comment on ado since i'm not a user. But the fact that
ASA+mxODBC runs multi-platform may be an additional advantage.

Regards

Francis

from mx import ODBC
import time
mytime=time.time()
print "1 connection and 750 cursors started, used and closed at once..."
dbHandle=ODBC.Windows.Connect("descriptive demo fr","dupont","",0)
for i in range(100):
	cHandle=dbHandle.cursor()
	cHandle.execute("select 1")
	cHandle.fetchall()
	cHandle.close()
print time.time() - mytime
print "750 connection fully started, used and closed at once..."
for i in range(100):
	dbHandle=ODBC.Windows.Connect("descriptive demo fr","dupont","",0)
	cHandle=dbHandle.cursor()
	cHandle.execute("select 1")
	cHandle.fetchall()
	cHandle.close()
	dbHandle.close()
print time.time() - mytime


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 10:06:45 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 15:06:45 +0100
Subject: terminate exectutioin in PythonWin
In-Reply-To: <MPG.1cc7cd342ff0eccc989687@news-server>
References: <d3j265$ne6$1@scotsman.ed.ac.uk>
	<MPG.1cc7cd342ff0eccc989687@news-server>
Message-ID: <d3j909$o60$1@scotsman.ed.ac.uk>

Neil Hodgson wrote:
> Jim,
> 
> 
>>1.Could someone tell me how to terminate execution in PythonWin?
> 
> 
>    Use the "Break into running code" command on the context menu of the 
> PythonWin icon in the bottom right of the taskbar.
> 
>    Neil

Great thanks! PythonWin isn't hot on keyboard shortcuts but ironically 
calls this a KeyboardInterrupt :|

Know any keyboard shortcuts for debug view? e.g. open it, run(debug), 
step etc.

Jim


From aahz at pythoncraft.com  Fri Apr  1 20:00:13 2005
From: aahz at pythoncraft.com (Aahz)
Date: 1 Apr 2005 20:00:13 -0500
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
Message-ID: <d2kqqt$ss7$1@panix2.panix.com>

In article <mailman.1192.1112376393.1799.python-list at python.org>,
=?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
>[Sunnan]
>>
>> [...] for Pythons ideal of having one canonical, explicit way to
>> program.
>
>No doubt it once was true, but I guess this ideal has been abandoned a
>few years ago.
>
>My honest feeling is that it would be a mis-representation of Python,
>assertng today that this is still one of the Python's ideals.

Mind providing evidence rather than simply citing your feelings?  Yes,
there's certainly redundancy in Python right now, but a large portion of
that will go away in Python 3.0.  So where's the abandonment of the
ideal?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From __peter__ at web.de  Tue Apr 26 05:41:01 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 26 Apr 2005 11:41:01 +0200
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
Message-ID: <d4l2al$iif$01$2@news.t-online.com>

Dumbkiwi wrote:

> I'm trying to get python, unicode and kdialog to play nicely together.
> This is a linux machine, and kdialog is a way to generate dialog boxes in
> kde with which users can interact (for example input text), and you can
> use the outputted text in your script.
> 
> Anyway, what I'm doing is reading from a utf-8 encoded text file using the
> codecs module, and using the following:
> 
> data = codecs.open('file', 'r', 'utf-8')

data is now a unicode string.

> 
> I then manipulate the data to break it down into text snippets.
> 
> Then I run this command:
> 
>>>> test = os.popen('kdialog --inputbox %s' %(data))
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> UnicodeEncodeError: 'ascii' codec can't encode character u'\u017a' in
> position 272: ordinal not in range(128)
> 
> I would really like kdialog display the text as utf-8.  However, it seems
> that python is trying to pass the utf-8 encoded data as ascii, which
> obviously fails because it can't deal with the utf-8 encoded text.  Is it
> possible to pass the text out to kdialog as utf-8, rather than ascii?

Just encode the data in the target encoding before passing it to os.popen():

test = os.popen('kdialog --inputbox %s' % data.encode("utf-8"))

Peter



From pete.a.lee at gmail.com  Sun Apr 17 11:26:27 2005
From: pete.a.lee at gmail.com (Peter Lee)
Date: Sun, 17 Apr 2005 15:26:27 GMT
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
	<425AF2AB.1030401@v.loewis.de>
	<425b8948$0$38045$bed64819@news.gradwell.net>
	<mailman.1769.1113320562.1799.python-list@python.org>
Message-ID: <u7jj177bx.fsf@gmail.com>

>>>> Terry Reedy writes:

    >> To put it another way, needing a Python interpreter to run .py files is no 
    >> different from, for instance, needing a movie player to run .mpg files, and 
    >> all Windows users are or need to become familiar with that general concept.

The problem for windows users isn't that they have to download a movie
player to play .mpg files... it's that they also have to download and
install python/java runtime to "play" the player because it was written
in python/java.  Most won't bother and will download/install native
win32 app instead.



From claudio.grondi at freenet.de  Tue Apr 12 09:47:25 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 12 Apr 2005 13:47:25 -0000
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net> <du71x9ho29x.fsf@mozart.cc.tut.fi>
Message-ID: <3c1qrjF6k3k4fU1@individual.net>

Considering what I found in the ipython mailing archives
and the fact, that after the fix with displaying colors on
bright backgrounds Gary had no time yet to get in touch
with me about the code I have sent him, I suppose, that
there will be no new releases addressing this problem
soon, right?

Claudio
lazy at the moment, because instead of trying to fix it just
switched back to Idle ...

"Ville Vainio" <ville at spammers.com> schrieb im Newsbeitrag
news:du71x9ho29x.fsf at mozart.cc.tut.fi...
> >>>>> "Claudio" == Claudio Grondi <claudio.grondi at freenet.de> writes:
>
>     Claudio> Is it already known, that after switching the keyboard
>     Claudio> input scheme on German Windows 2000 to english USA
>     Claudio> International IPython generates \x00" instead of " when
>     Claudio> trying to input quotation marks?
>
> This has been reported previously - apparently it's a problem with
> Gary's readline module (or however it was called ;-), and hacking it
> solved the problem for someone. I suggest you search the ipython
> mailing list archives, or post this question there.
>
> -- 
> Ville Vainio   http://tinyurl.com/2prnb




From anthra.norell at tiscalinet.ch  Sat Apr 30 18:00:08 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Sun, 1 May 2005 00:00:08 +0200
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com><1114127633.859113.292290@l41g2000cwc.googlegroups.com><#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114893545.927914.299170@l41g2000cwc.googlegroups.com>
Message-ID: <014001c54dcf$f91ca420$0201a8c0@mcuf7>

It must be because there aren't enough real problems that so many people
devote so much energy to inventing so many imaginary ones.

Frederic

(GOD tells me---much against my will; I categorically refuse to be a
prophet!---to throw this piece of  HIS divine wisdom into the melee.)


----- Original Message -----
From: "Obaid R." <yhdanid at yahoo.com>
Newsgroups: microsoft.public.windowsxp.network_web,
rec.music.beatles,rec.music.makers.guitar.acoustic,
alt.showbiz.gossip,comp.lang.python
To: <python-list at python.org>
Sent: Saturday, April 30, 2005 10:39 PM
Subject: Re: Ron Grossi: God is not a man


> Non-Offensive, Professional Sounding Name
>
>
> First of all, there was no "diatribe", even
> when you can claim there was one. Unless of
> course you consider the contents of the Bible
> from which I quote as such. Seeing that you
> claimed that there was no truth in my post, I
> was hoping to read proof in support of your
> claim. To my disappointment, there was none.
> Just a reference to the word "Allah" made,
> alas, in haste.
>
> I wish that you'd considered your words
> before you rushed to post. I say that for the
> following reason: did you know that there are
> around 26 million Christian Arabs living in
> the world today? Did you know that their
> Arabic Bibles (together with their Arab Jews
> brethren) have the word "Allah" exactly where
> the word "God" appears in your English Bible?
>
> Furthermore, did you know that in Malta, made
> up of a population of staunch Catholics,
> people use the word "Allah" for God in their
> own language?
>
> Perhaps you'd be interested in reading "Who
> is Allah?"[1] and "The Word ALLAH in the
> Arabic Bible"[2] both essays by Abu Iman 'Abd
> ar-Rahman Robert Squires.
>
> And in case you don't believe either of us,
> then visit these links from
> bible.gospelcom.net showing you how the word
> "Allah" does appear in the Arabic Bible where
> the word "God" appears in the English one.
>
>
>
> FROM THE ARABIC BIBLE
> =====================
>
> Genesis 1: 1
> In the beginning God created the heavens and the earth.
>
http://bible.gospelcom.net/bible?passage=GEN+1:1&language=arabic&version=IBS
&showfn=on&showxref=on
>
>
> Genesis 1: 8:
> And God called the firmament Heaven. And there was evening and there
> was morning, a second day.
>
http://bible.gospelcom.net/bible?passage=GEN+1:8&language=arabic&version=IBS
&showfn=on&showxref=on
>
>
> Mark 10: 18
> And Jesus said unto him, Why callest thou me good? there is none good
> but one, that is, God.
>
http://bible.gospelcom.net/bible?passage=MARK+10:18&language=arabic&version=
IBS&showfn=on&showxref=on
>
>
> John 3: 16
> For God so loved the world that he gave his only Son, that whoever
> believes in him should not perish but have eternal life.
>
http://bible.gospelcom.net/bible?passage=JOHN+3:16&language=arabic&version=I
BS&showfn=on&showxref=on
>
>
> Luke 3: 38
> the son of Enos, the son of Seth, the son of Adam, the son of God.
>
http://bible.gospelcom.net/bible?passage=LUKE+3:38&language=arabic&version=I
BS&showfn=on&showxref=on
>
>
> Mark 1: 14
> Now after John was arrested, Jesus came into Galilee, preaching the
> gospel of God,
>
http://bible.gospelcom.net/bible?passage=MARK+1:14&language=arabic&version=I
BS&showfn=on&showxref=on
>
> Mark 3: 35
> Whoever does the will of God is my brother, and sister, and mother.
>
http://bible.gospelcom.net/bible?passage=MARK+3:35&language=arabic&version=I
BS&showfn=on&showxref=on
>
>
>
>
>
> RESOURCES
> =========
>
> [1] Squires, Robert, "Who is Allah?" April 30, 2005:
> http://www.wol.net.pk/truth/6who.htm
> [2] Squires, Robert, "The Word ALLAH in the Arabic Bible" April 30,
> 2005: http://www.wol.net.pk/truth/6aib.htm
>
> --
> http://mail.python.org/mailman/listinfo/python-list



From simon.brunning at gmail.com  Wed Apr 20 07:14:23 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 12:14:23 +0100
Subject: goto statement
In-Reply-To: <d45cun$ec3$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
Message-ID: <8c7f10c6050420041424816b84@mail.gmail.com>

On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
> it would be quite useful for debuging porposes

How does goto help you to remove bugs?

I can certainly see how it helps you put them in in the first place...

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From jason at tishler.net  Sat Apr 30 11:06:15 2005
From: jason at tishler.net (Jason Tishler)
Date: Sat, 30 Apr 2005 11:06:15 -0400
Subject: Fwd: how to find the drive in python/cygwin?
In-Reply-To: <427399E7.49228F17@pauahtun.org>
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
	<3511dc7505042617524edd244a@mail.gmail.com>
	<426EE4B8.6910F6DD@pauahtun.org>
	<20050430132423.GA2824@tishler.net>
	<4273883C.B25B19B0@pauahtun.org>
	<20050430143928.GB2824@tishler.net>
	<427399E7.49228F17@pauahtun.org>
Message-ID: <20050430150615.GC2824@tishler.net>

Ivan,

On Sat, Apr 30, 2005 at 08:44:55AM -0600, Ivan Van Laningham wrote:
> Jason Tishler wrote:
> > I was just clarifying that the win32api module is not supported
> > under Cygwin Python.
> 
> Could you clarify?  I always thought that the only thing really
> different were the default path assumptions--/ instead of \, and so
> on--rather than anything substantive.  I try to use os.path.sep() and
> os.path.join(), etc.
> 
> What else could bite me?  ;-)

Not much -- at least not too hard. :,)  Anyway, only the low level stuff
would be different: Posix versus Win32, shared extensions, etc.  The
high level stuff should be the same -- isn't Python just Python. :,)

Jason

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


From ivanlan at pauahtun.org  Tue Apr 19 11:31:27 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 19 Apr 2005 09:31:27 -0600
Subject: Name/ID of removable Media: how?
References: <d42lho$fbf$1@news.mch.sbs.de> <42650A59.3DF3C6DE@pauahtun.org>
Message-ID: <4265244F.86161A59@pauahtun.org>

Hi All--
Tim's wmi stuff looked interesting, so I tried it out, and now I have a
question.


-----
#!/usr/bin/python

import wmi
import win32api


c=wmi.WMI()
for i in c.Win32_CDROMDrive():
    v=i.VolumeSerialNumber
    print "WMI serial",v,long(v,0x10)

vn,sn,ln,flg,fstype=win32api.GetVolumeInformation("d:\\")
print "win32api serial",sn,long(sn)
----

The output from the above script (drive d contains cd) is:

WMI serial D0ADBEE7 3501047527

win32api serial -793919769 -793919769


What's the difference between the two serial numbers?  WMI is returning
a long converted to a hex repr string, while win32api is returning an
int (type(sn) is <type 'int'>), & converting to hex bears no resemblance
to what WMI shows.  What am I missing?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From modelnine at ceosg.de  Mon Apr  4 16:12:00 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 22:12:00 +0200
Subject: Changing TEXT color from python
In-Reply-To: <1112644779.486105.179240@l41g2000cwc.googlegroups.com>
References: <1112644779.486105.179240@l41g2000cwc.googlegroups.com>
Message-ID: <200504042212.03699.modelnine@ceosg.de>

Am Montag, 4. April 2005 21:59 schrieb GujuBoy:
> how can i do this...and hopefully without including any external
> modules.

It depends.

Under *NIX, have a look at the curses module.

Under Windows, Google for ANSI.SYS and read up on Escape Sequences, or check 
out the curses for Windows implementation that's floating around somewhere on 
the net, I don't know the URL.

HTH!

-- 
--- Heiko.
listening to: Nine Inch Nails - Somewhat Damaged
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From max at alcyone.com  Sat Apr 16 16:26:21 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 16 Apr 2005 13:26:21 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <slrnd623dv.3k0.klaus@main.szn.dk>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
Message-ID: <rLWdnf_zHqdw6fzfRVn-3w@speakeasy.net>

Klaus Alexander Seistrup wrote:

> However, MLPY doesn't seem to work on my Tungsten T3 (PalmOS 5.2.1).
> The .prc installs without any problems, and I can start the Python
> interpreter, but nothing happens if I ring in a Python expression and
> press return -- the prompt just "hangs" and never returns.

It worked on my Treo 650, although you quickly ran out of space in the 
input text area (if you typed too many characters it would beep and 
prevent you from typing anymore).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   It comes from inside, and that's what I consider to be soul music.
   -- Sade Adu


From modelnine at ceosg.de  Tue Apr  5 06:02:52 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Tue, 5 Apr 2005 12:02:52 +0200
Subject: setup distributed computing for two computer only
In-Reply-To: <425258b8$0$152$e4fe514c@news.xs4all.nl>
References: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>
	<mailman.1313.1112643254.1799.python-list@python.org>
	<425258b8$0$152$e4fe514c@news.xs4all.nl>
Message-ID: <200504051202.55755.modelnine@ceosg.de>

Am Dienstag, 5. April 2005 11:22 schrieb Irmen de Jong:
> > Python Remote Objects
>
> ^^^ what Heiko said :)

*biggrin*

-- 
--- Heiko.
listening to: Tool - Lateralus - 1 The Grudge.mp3
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From peter at engcorp.com  Wed Apr 20 20:14:50 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 20:14:50 -0400
Subject: Resolving 10060, 'Operation timed out'
In-Reply-To: <42669814.9000104@syscononline.com>
References: <1114018777.408294.304200@z14g2000cwz.googlegroups.com>
	<42669814.9000104@syscononline.com>
Message-ID: <q_GdnV7wcP9dbfvfRVn-vw@powergate.ca>

Larry Bates wrote:
> My manual says that socket has a settimeout(value) but I don't
> seem to find anything on socket.setdefaulttimeout method you
> refer to.

Larry, the module has a setdefaulttimeout() function,
while socket objects themselves have a settimeout().

To the OP: did you already create your socket object
before you called setdefaulttimeout()?  That setting
applies only to *new* sockets created after you call
the function...

-Peter


From nicksjacobson at yahoo.com  Thu Apr 21 03:48:35 2005
From: nicksjacobson at yahoo.com (nicksjacobson at yahoo.com)
Date: 21 Apr 2005 00:48:35 -0700
Subject: deprecation of has_key?
Message-ID: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>

I haven't heard of any plans to deprecate the dictionary has_key
method, as the "in" keyword makes it obsolete.

i.e.
if key in dict:

instead of
if dict.has_key():


Is there some reason to keep has_key?

--Nick



From harold.fellermann at upf.edu  Fri Apr  1 13:49:25 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Fri, 1 Apr 2005 20:49:25 +0200
Subject: class attributes and inner classes in C extensions
In-Reply-To: <k6nmidew.fsf@python.net>
References: <26f807b9d58f39d1ae191249a187caf4@upf.edu><mailman.1189.11123726
	50.1799.python-list@python.org> <k6nmidew.fsf@python.net>
Message-ID: <8f0b59fad7efb9213a0eb1902fead3fd@upf.edu>

> I think you could as well, after PyType_Ready() is called, set it
> yourself with
>   PyObject_SetAttrString(FooType, "Bar", FooBarType);
>
> You *may* have to cast the FooType and FooBarType to (PyObject *), to
> avoid compiler warnings.

I tried this. Its shorter and and works fine, too. thanks for the 
proposal.

- harold -

--
I wish there was a knob on the TV to turn up the intelligence.
There's a knob called "brightness", but it doesn't seem to work.
-- Gallagher



From bdesth.quelquechose at free.quelquepart.fr  Sun Apr 24 15:37:46 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 24 Apr 2005 21:37:46 +0200
Subject: Python or PHP?
In-Reply-To: <mailman.2344.1114264376.1799.python-list@python.org>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
Message-ID: <426bf136$0$20479$626a14ce@news.free.fr>

Mage a ?crit :

> I can tell:
> - python is more *pythonic* than php

Keyboard !-)



From test at test.com  Tue Apr 12 01:38:07 2005
From: test at test.com (Health)
Date: 12 Apr 2005 05:38:07 GMT
Subject: World First Cancer Immune Booster
Message-ID: <425b5ebf$1$10822$afc38c87@news.optusnet.com.au>

Most people with Cancer or AIDS have no immune system left.

We've developed a world first "natural immune booster" which helps
people fight their disease.

Our totally natural product comes from the fresh Arctic Ocean.

www.protecura.com


From merkosh at hadiko.de  Fri Apr  8 09:45:35 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Fri, 08 Apr 2005 15:45:35 +0200
Subject: unknown encoding problem
Message-ID: <d361u0$152$1@news2.rz.uni-karlsruhe.de>

Hi,

I need to read in a text file which seems to be stored in some unknown
encoding. Opening and reading the files content returns:

>>> f.read()
'\x00 \x00 \x00<\x00l\x00o\x00g\x00E\x00n\x00t\x00r\x00y\x00...

Each character has a \x00 prepended to it. I suspect its some kind of
unicode - how do I get rid of it? 

str.replace('\x00', '') "works" but is not really nice. I don't quite get
the hang of str.encode /str.decode

Any Ideas?
Thanks
Ciao
Uwe     


From skip at pobox.com  Tue Apr 26 15:53:49 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 26 Apr 2005 14:53:49 -0500
Subject: regex over files
In-Reply-To: <426E893D.2070905@chamonix.reportlab.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
Message-ID: <17006.40013.420134.534537@montanaro.dyndns.org>

    >> It's hard to imagine how sliding a small window onto a file within Python
    >> would be more efficient than the operating system's paging system. ;-)

    Robin> well it might be if I only want to scan forward through the file
    Robin> (think lexical analysis). Most lexical analyzers use a buffer and
    Robin> produce a stream of tokens ie a compressed version of the
    Robin> input. There are problems crossing buffers etc, but we never
    Robin> normally need the whole file in memory.

If I mmap() a file, it's not slurped into main memory immediately, though as
you pointed out, it's charged to my process's virtual memory.  As I access
bits of the file's contents, it will page in only what's necessary.  If I
mmap() a huge file, then print out a few bytes from the middle, only the
page containing the interesting bytes is actually copied into physical
memory.

Skip


From fredrik at pythonware.com  Sun Apr 24 07:47:20 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 13:47:20 +0200
Subject: Object oriented storage with validation (was:
	Re:Cachingcompiled regexps across sessions (was Re:
	RegularExpressions- Python vs Perl))
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com><d48ktk$4ov$1@news.vcd.hp.com><RMmdnRLDlZu6fPrfRVn-rQ@telcove.net><mailman.2250.1114119969.1799.python-list@python.org><m3sm1jbfek.fsf@iny.iki.fi><du7sm1j6uzc.fsf@mozart.cc.tut.fi><m3u0lzm5q1.fsf@iny.iki.fi><roy-F93E58.08375122042005@reader1.panix.com><m3oec6c056.fsf@iny.iki.fi><mailman.2289.1114190176.1799.python-list@python.org><m3k6muaxmi.fsf@iny.iki.fi><du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi><m3ekd0vd6i.fsf_-_@iny.iki.fi><d4fv2r$mu5$1@sea.gmane.org>
	<d4g04p$p6m$1@sea.gmane.org>
Message-ID: <d4g0me$qc9$1@sea.gmane.org>

no wait, *three* validating parsers/validators for ET

    http://online.effbot.org/2005_02_01_archive.htm#elementrxp
    http://codespeak.net/lxml/
    http://www.leuthe.homepage.t-online.de/minixsv/minixsv_overview.html
    parse(os.popen("xmllint --valid %s" % filename))...

I'll come in again.

</F>





From ramyamvk at yahoo.com  Wed Apr 27 04:08:19 2005
From: ramyamvk at yahoo.com (ramyamvk)
Date: Wed, 27 Apr 2005 08:08:19 -0000
Subject: How do I access variable declared in one script in another python
	script
Message-ID: <d4nh9j+2hhr@eGroups.com>


Hi All,    

    Please could anyone tell me how to do this :
I have one expect script, where i store some value in a variable.

I am calling this script from my python script, and need to use this
variable in the python script. How do i access this variable from my
python script ?

Thanks,
ramya





From achrist at easystreet.com  Sat Apr  9 14:31:01 2005
From: achrist at easystreet.com (Al Christians)
Date: Sat, 09 Apr 2005 11:31:01 -0700
Subject: ntvdm problem on win2k
In-Reply-To: <115g61r25jhbaac@corp.supernews.com>
References: <115g61r25jhbaac@corp.supernews.com>
Message-ID: <115g7ro6trphs7b@corp.supernews.com>


Here's some more info on this:

When I use the Win2k feature to search for files, it turns up python.exe 
in the \cygwin\bin directory.  The file size is shown  as 24 bytes. 
Mighty small for an executable.  The file is hidden.  This is evidently 
the guy who was caussing the problem.

Why does cygwin include a hidden file that hides python on the path?

Al Christians wrote:

> I started having some problems running python programs (python 2.3) from 
> the Win2k command line.  I would get crashes with an NTVDM error.  Even 
> just executing python would cause it.  I upgraded to python 2.3.5, and 
> no difference.  When I rearranged my path to move cygwin and a bunch of 
> other stuff (.net, etc) after C:\python23, the problem went away.
> 
> Is this problem known to anyone but me?  Any diagnosis, solution of 12 
> or fewer steps, or support group?   If I'm distributing python programs 
> (python 2.3.5 packaged with py2exe) should I warn or notify the 
> recipients that this is a possible problem with the programs?
> 
> TIA
> 
> Al


From mahs at telcopartners.com  Fri Apr 29 21:48:53 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 29 Apr 2005 18:48:53 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <3dg5isF6qe1nhU1@news.dfncis.de>
References: <d4u60o$akh$1@news2.netvision.net.il>	<mailman.47.1114818531.14961.python-list@python.org>
	<3dg5isF6qe1nhU1@news.dfncis.de>
Message-ID: <d4unqt$qvr$1@sea.gmane.org>

David Murmann wrote:
> Shane Hathaway wrote:
> 
>> That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
>> "temporary end".
>>
>> Shane
>>
>> P.S. I hope I didn't hammer your server on step 3.  I was missing the
>> mark. :-)
> 
> 
> Interestingly step 3 is actually wrong... there is an additional 
> solution, which looks like cqqmsxk. (I don't think that spoils the fun :))

the 'm' is silent ;-)






From kent37 at tds.net  Tue Apr 19 10:24:16 2005
From: kent37 at tds.net (Kent Johnson)
Date: Tue, 19 Apr 2005 10:24:16 -0400
Subject: Update Label when Scale value changes
In-Reply-To: <1113919325.498539.323190@o13g2000cwo.googlegroups.com>
References: <1113916746.841747.274550@l41g2000cwc.googlegroups.com>
	<9Z79e.969$cL6.77@news.get2net.dk>
	<1113919325.498539.323190@o13g2000cwo.googlegroups.com>
Message-ID: <42651054$1_1@newspeer2.tds.net>

codecraig wrote:
> Yea that is what i needed.  Can you recommend a good Tkinter site (or
> book, but preferably site) about learning Tkinter.
> 
> I've tried:
> http://www.python.org/moin/TkInter
> http://www.pythonware.com/library/tkinter/introduction/

I also like
http://infohost.nmt.edu/tcc/help/pubs/tkinter/

Kent


From fred at adventistcare.org  Thu Apr 14 14:06:38 2005
From: fred at adventistcare.org (Sells, Fred)
Date: Thu, 14 Apr 2005 14:06:38 -0400
Subject: Generating RTF with Python
Message-ID: <777056A4A8F1D21180EF0008C7DF75EE03317457@sunbelt.org>

Apache fop does a good job of combining xslt+xml to generate pdf; the spec
says it does RTF, but I have not tried it.  Although fop is java, you can
run it as a (java) executable, so you could run it as a command from python.
It is almost as good as reportlab's stuff.

-----Original Message-----
From: Max M [mailto:maxm at mxm.dk]
Sent: Thursday, March 31, 2005 11:56 AM
To: python-list at python.org
Subject: Re: Generating RTF with Python


Axel Straschil wrote:
> Hello!
> 
> 
>>does anyone know of a high-level solution to produce RTF from Python=20
>>(something similar to
>>Reportlab for producing PDF)?
> 
> Spend hours of googeling and searching, also in this NG, about two
> months ago. My conclusion is: On windwos, maybe you can include some
> hacks with dll's, under linux, linux support for generating rtf is none,
> and so is python's.
> 
> My workaround was: 
> http://www.research.att.com/sw/download/
> This includes an html2rtf converter, which I access from python via
> popen and temporary files. Not high-level, not very sexy ... ;-(


I looked at this a while ago, which might be a starter.

http://pyrtf.sourceforge.net/


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science
-- 
http://mail.python.org/mailman/listinfo/python-list


From bokr at oz.net  Wed Apr 27 00:34:33 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 27 Apr 2005 04:34:33 GMT
Subject: regex over files
References: <mailman.2466.1114441409.1799.python-list@python.org>
Message-ID: <426f01ad.7196928@news.oz.net>

On Mon, 25 Apr 2005 16:01:45 +0100, Robin Becker <robin at reportlab.com> wrote:

>Is there any way to get regexes to work on non-string/unicode objects. I would 
>like to split large files by regex and it seems relatively hard to do so without 
>having the whole file in memory. Even with buffers it seems hard to get regexes 
>to indicate that they failed because of buffer termination and getting a partial 
>match to be resumable seems out of the question.
>
>What interface does re actually need for its src objects?

ISTM splitting is a special situation where you can easily
chunk through a file and split as you go, since if splitting
the current chunk succeeds, you can be sure that all but the
tail piece is valid[1]. So you can make an iterator that yields
all but the last and then sets the buffer to last+newchunk
and goes on until there are no more chunks, and the tail part
will be a valid split piece. E.g., (not tested beyond what you see ;-)

 >>> def frxsplit(path, rxo, chunksize=8192):
 ...     buffer = ''
 ...     for chunk in iter((lambda f=open(path): f.read(chunksize)),''):
 ...         buffer += chunk
 ...         pieces = rxo.split(buffer)
 ...         for piece in pieces[:-1]: yield piece
 ...         buffer = pieces[-1]
 ...     yield buffer
 ...
 >>> import re
 >>> rxo = re.compile('XXXXX')

The test file:

 >>> print '----\n%s----'%open('tsplit.txt').read()
 ----
 This is going to be split on five X's
 like XXXXX but we will use a buffer of
 XXXXX length 2 to force buffer appending.
 We'll try a splitter at the end: XXXXX
 ----

 >>> for piece in frxsplit('tsplit.txt', rxo, 2): print repr(piece)
 ...
 "This is going to be split on five X's\nlike "
 ' but we will use a buffer of\n'
 " length 2 to force buffer appending.\nWe'll try a splitter at the end: "
 '\n'

 >>> rxo = re.compile('(XXXXX)')
 >>> for piece in frxsplit('tsplit.txt', rxo, 2): print repr(piece)
 ...
 "This is going to be split on five X's\nlike "
 'XXXXX'
 ' but we will use a buffer of\n'
 'XXXXX'
 " length 2 to force buffer appending.\nWe'll try a splitter at the end: "
 'XXXXX'
 '\n'

[1] In some cases of regexes with lookahead context, you might
have to check that the last piece not only exists but exceeds
max lookahead length, in case there is a <withlookahead>|<plain>
kind of thing in the regex  where <lookahead> would have succeeded
with another chunk appended to buffer, but <plain> did the split.

Regards,
Bengt Richter


From jepler at unpythonic.net  Tue Apr 12 09:58:22 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 12 Apr 2005 08:58:22 -0500
Subject: Tkinter "withdraw" and "askstring" problem
In-Reply-To: <20050412131148.GT2960@zoran.com>
References: <20050412131148.GT2960@zoran.com>
Message-ID: <20050412135821.GC2419@unpythonic.net>

The answer has to do with a concept Tk calls "transient".  
    wm transient window ?master?
        If master is specified, then the window manager is informed that
        window  is  a  transient window (e.g. pull-down menu) working on
        behalf of master (where master is the path name for a  top-level
        window).   If master is specified as an empty string then window
        is marked as not being a transient window any  more.   Otherwise
        the command returns the path name of window?s current master, or
        an empty string if window isn?t currently a transient window.  A
        transient  window  will  mirror  state changes in the master and
        inherit the state of the master when initially mapped. It is  an
        error to attempt to make a window a transient of itself.

In tkSimpleDialog, the dialog window is unconditionally made transient
for the master.  Windows is simply following the documentation: The
askstring window "inherit[s] the state of the master [i.e., withdrawn]
when initially mapped".

The fix is to modify tkSimpleDialog.Dialog.__init__ to only make the
dialog transient for its master when the master is viewable.  This
mirrors what is done in dialog.tcl in Tk itself.  You can either change
tkSimpleDialog.py, or you can include a new definition of __init__ with 
these lines at the top, and the rest of the function the same:
    def __init__(self, parent, title = None):
        ''' the docstring ... '''
        Toplevel.__init__(self, parent)
        if parent.winfo_viewable():
            self.transient(parent)
        ...

    # Thanks for being so dynamic, Python!
    tkSimpleDialog.Dialog.__init__ = __init__; del __init__

Jeff
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From apardon at forel.vub.ac.be  Thu Apr 14 03:41:54 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Apr 2005 07:41:54 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1793.1113334936.1799.python-list@python.org>
	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1818.1113375260.1799.python-list@python.org>
	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1823.1113383437.1799.python-list@python.org>
	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1860.1113432730.1799.python-list@python.org>
Message-ID: <slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
> Antoon Pardon wrote:
>> Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>> 
>>>Antoon Pardon wrote:
>>>
>>>>Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>>>
>>>>>Yes, the license text and the copyright notice must be attached. It 
>>>>>doesn't mean that the PSF license is the operative one for the 
>>>>>derivative work.
>>>>
>>>>
>>>>Why attach a license that is not operative. That doesn't make sense
>>>>to me and will IMO just create confusion.
>>>
>>>Because it's not your code. The tiny obligation that you have to satisfy 
>>>is to say that some of the code comes from someone else and is available 
>>>under such-and-such a license. That's it. You can keep the code hidden, 
>>>you can charge whatever you like for it, but you have to attribute it 
>>>properly. Open source licenses don't get much less restrictive than this.
>> 
>> 
>> Well maybe this is a semantic problem. I wouldn't use the word "attach"
>> here.
>
> Fair enough. The license text is included *for reference*, not because 
> it is *the* license for the derived work. In fact, it *can't* be the 
> license of the derived work because you are not the PSF.
>
>> So what I seem obligated to do, is 1) Mentioning this came
>> from the python distribution and 2) explain where this distribution can
>> be attained and under what license.
>
> The minimum is:
>
> 1) Put the copyright notice in.
> 2) Reference a copy of the PSF License. (Practically speaking, a URL 
> will probably do.)
> 3) List the modifications you made.
> 4) Put your copyright notice in and whatever terms you want to apply.
>
>>>Of course, IANAL and TINLA, so if you want real legal advice instead of 
>>>advice from random newsgroup bums like myself, you should talk to a lawyer.
>> 
>> 
>> Well if it comes so far I have to consult a lawyer I'd rather not publish
>> it in the first place.
>
> Then take the (free) advice that you asked for. 

I'll do that and I appreciate your time in giving it.

> And please do read Rosen's book.

I started already.

>> The only reason I'm concerned is that this is to be part of a tutorial
>> and I prefer not to burden those who read the tutoral with any kind of
>> license. As far as I'm concerned people reading the tutorial can use
>> any code provided with it in any way they see fit.
>
> You can't *quite* go that far if you are deriving code from Python, but 
> it's about as close as you can get. You still have those light 
> restrictions about attribution and notification of changes.

I'm not sure I follow. As far as I understand, I can license the result
however I see fit, as long as I go by the conditions for using the
original code. So it seems I can use a license so that the readers
of the tutorial don't have to be concerned in how they use the code.

>> I see this as my contribution to the communities who has provided me
>> with all kinds of things that are usefull to me. I'm willing to put
>> time into this, but if I have to spend money because it is impossible
>> otherwise to find out how to contribute legally, that is a hurdle
>> I'm reluctant to take.
>
> You could take a look at what other people are doing. Most of us here 
> are writing and releasing software derived from Python, legally so and 
> without complication.

I would do that if I were just writing code I thought others could
find usefull. I then would feel no problem "burdening" those users
with the same kind of license I found in the product I took some
code from. But I also think that readers of documentation should
be free to use any code included in any way they see fit.

-- 
Antoon Pardon


From kent37 at tds.net  Sat Apr 23 23:24:07 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 23 Apr 2005 23:24:07 -0400
Subject: Variables
In-Reply-To: <mailman.2368.1114311072.1799.python-list@python.org>
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
Message-ID: <426b0d03_3@newspeer2.tds.net>

Richard Blackwood wrote:
>>> To All:
>>>
>>>    Folks, I need your help. I have a friend who claims that if I write:
>>>
>>> foo = 5
>>>
>>> then foo is NOT a variable, necessarily. 
>>
> Indeed, this language is math. My friend says that foo is a constant and 
> necessarily not a variable. 

Well, we mostly talk Python here, not math. In Python, if you say
foo = 5
foo is a name bound to an immutable value.

If I had written foo = raw_input(), he would
> say that foo is a variable. 

That's funny. foo is still a name bound to an immutable (string) value. foo is no more or less 
variable than it was with foo = 5.

Which is perfectly fine except that he
> insists that since programming came from math, the concept of variable 
> is necessarily the identical. This can not be true. For example, I may 
> define foo as being a dictionary, but I can not do this within math 
> because there is no concept of dictionaries within mathematics; yet foo 
> is a variable, a name bound to a value which can change.

Sounds like you are having a stupid and meaningless argument with your friend. What you call foo 
won't change what it is. He should learn Python, then he would understand the true zen of foo.

Kent


From fredrik at pythonware.com  Tue Apr 12 05:37:39 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 11:37:39 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz><mailman.1724.1113261387.1799.python-list@python.org><1113264839.497914.210170@z14g2000cwz.googlegroups.com>
	<425b8cf7$0$38043$bed64819@news.gradwell.net>
Message-ID: <d3g4nc$fed$1@sea.gmane.org>

Michael Kearns wrote:

> I would guess from the responses so far that Python 2.4 just isn't used within commercially 
> shipping products

that kind of unfounded hyperbole only makes you look silly.

> I don't know.

exactly.  now calm down, and go read the replies to this thread again.  or consult
a lawyer, and make it clear to him that you're not actually *using* the MSVCR71
component yourself, *and* that the Python application you are using (and passing
on to your users) is adding significant and primary functionality to the MSCVR71
library.

</F> 





From axel at straschil.com  Sat Apr 30 02:41:44 2005
From: axel at straschil.com (Axel Straschil)
Date: 30 Apr 2005 06:41:44 GMT
Subject: Reusing object methods?
References: <d4trsp$jsl$1@bagan.srce.hr>
Message-ID: <slrnd76a58.aur.axel@m2.sine>

Hello!

Why not:

> class A:
>      def a_lengthy_method(self, params):
>           # do some work depending only on data in self and params
>
> class B(A): pass

?

Lg,
AXEL.


From radam2 at tampabay.rr.com  Tue Apr  5 01:38:30 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 05:38:30 GMT
Subject: Decorator Maker is working. What do you think?
References: <sql3515i90b9v5mojnkaet31ftr57hr99j@4ax.com>
Message-ID: <ro745153nj0s5jtrsak94kj4pfsttshfaj@4ax.com>



Hi again,  If anyone is reading this.

Fixed the endless loop when stacking the same decorator instance.  You
can now reuse the same exact decorator object either in stacks or on
different functions with different arguments.

The only quirk left is if you stack the same decorator object, and
have arguments on some, but not others.  The arguments get processed
first while preprocessing, and last when postprocessing.  That
shouldn't be a problem though and is easy to avoid by using an empty
argument lists where they are needed.

Let me know if there are still any problems with it.  I know someone
will find this useful.

Cheers,
Ron


(I left off the tests as they were getting to be quite long.)

#---start---

class Decorator(object):
    """
    Decorator - A base class to make decorators with.

    self.function - the function decorated.
    self.arg - argument list passed by decorator
    self.preprocess - over ride to preprocess function arguments
    self.postprocess - over ride to postprocess function results
    """
    def __init__(self):
        self.function = None
        self.arglist = []
        self.arg = None
        self._number = 0
               
    def __call__(self, *arg):        
        if '<function ' in str(arg):
            def _wrapper(*args):
                try:
                    self.arg = self.arglist[self._number]
                    self._number += 1
                except IndexError:
                    self.arg = None
                pre_args = self.preprocess(*args)
                if type(pre_args) is not tuple:
                    pre_args = (pre_args,)
                result = _wrapper.function(*pre_args)
                result =  self.postprocess(result)
                try:
                    self._number -= 1
                    self.arg = self.arglist[self._number-1]
                    if self._number == 0:
                        self.arglist = []
                        self.function = None
                        self.arg = None
                except IndexError:
                    self.arg = None
                return result
            _wrapper.function = arg[0]
            return _wrapper
        self.arglist.append(arg)
        return self
    
    def preprocess(self, *args):
        #
        #   Over ride this method.
        #
        return args
    
    def postprocess(self, result):
        #
        #   Over ride this method.
        #
        return result

#---end---


From grante at visi.com  Thu Apr 21 13:37:50 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 21 Apr 2005 17:37:50 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com>
	<d48h8f$i2d$1@panix2.panix.com>
Message-ID: <116fp7e9sf1uj41@corp.supernews.com>

On 2005-04-21, Roy Smith <roy at panix.com> wrote:
> Grant Edwards  <grante at visi.com> wrote:
>>Sure, but what about the case where his program is on paper
>>tape and all he has for an editor is an ice pick?
>
> Can't you emulate that in emacs with M-X inclusive-or-overwrite-mode?

Heck, emacs probably has a "paper-tape-mode" where it displays
the file like this:

  ooo.oooo
  ooo.oooo
  ooo.oooo
  ooo.oooo
  o o.o  o
  o o.oo
   oo.  oo
  o  .oo o
  ooo.oooo
    o.oo
   oo.oo o
  o o.o oo
  o  .ooo

....

If not, i'm sure it'll soon be added.

-- 
Grant Edwards                   grante             Yow!  I'm losing my
                                  at               hair...did it go to
                               visi.com            ATLANTIC CITY??


From listspam at flowtheory.net  Fri Apr  8 15:42:58 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Fri, 8 Apr 2005 13:42:58 -0600
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36hnj$6h6$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>
Message-ID: <303268b6f1dbd8823c988e145bf45ad4@flowtheory.net>

Try:

filter(lambda x: x.find(searchstring) != -1, lines)


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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 8, 2005, at 12:17 PM, jeremit0 wrote:

> I have read a text file using the command
>
> lines = myfile.readlines()
>
> and now I want to seach those lines for a particular string.  I was 
> hoping there was a way to "find" that string in a similar way as 
> searching simply a simple string.  I want to do something like
>
> lines.find.('my particular string')
>
> Is there a module that already exists that allows me to do this or 
> will I have to created my own method?
> Thanks,
> Jeremy
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>

From richardblackwood at cloudthunder.com  Sat Apr 23 23:31:12 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sat, 23 Apr 2005 23:31:12 -0400
Subject: Variables
In-Reply-To: <426b0d03_3@newspeer2.tds.net>
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b0d03_3@newspeer2.tds.net>
Message-ID: <426B1300.6090802@cloudthunder.com>

Kent Johnson wrote:

> Richard Blackwood wrote:
>
>>>> To All:
>>>>
>>>>    Folks, I need your help. I have a friend who claims that if I 
>>>> write:
>>>>
>>>> foo = 5
>>>>
>>>> then foo is NOT a variable, necessarily. 
>>>
>>>
>> Indeed, this language is math. My friend says that foo is a constant 
>> and necessarily not a variable. 
>
>
> Well, we mostly talk Python here, not math. In Python, if you say
> foo = 5
> foo is a name bound to an immutable value.
>
> If I had written foo = raw_input(), he would
>
>> say that foo is a variable. 
>
>
> That's funny. foo is still a name bound to an immutable (string) 
> value. foo is no more or less variable than it was with foo = 5.
>
> Which is perfectly fine except that he
>
>> insists that since programming came from math, the concept of 
>> variable is necessarily the identical. This can not be true. For 
>> example, I may define foo as being a dictionary, but I can not do 
>> this within math because there is no concept of dictionaries within 
>> mathematics; yet foo is a variable, a name bound to a value which can 
>> change.
>
>
> Sounds like you are having a stupid and meaningless argument with your 
> friend. What you call foo won't change what it is. He should learn 
> Python, then he would understand the true zen of foo.

That is exactly how I feel about it. Foo is what it is. Variable, name 
bound to immutable value, etc., what we call it doesn't really change 
how I program, only how I communicate with other programmers (and 
mathematicians). Is the notion of variable not a fundamental concept in 
programming?  Surely there must be an unambiguous definition I can relay 
to him.


From mlh at selje.idi.ntnu.no  Fri Apr  8 09:18:27 2005
From: mlh at selje.idi.ntnu.no (Magnus Lie Hetland)
Date: Fri, 8 Apr 2005 13:18:27 +0000 (UTC)
Subject: Positions of regexp groups
Message-ID: <slrnd5d153.7ht.mlh@selje.idi.ntnu.no>

Just a quick question: Does anyone have a simple way of finding the
positions (start, end) of the groups in a regexp match? AFAICS, the re
API can only return the contents...?

-- 
Magnus Lie Hetland                    Fall seven times, stand up eight
http://hetland.org                                  [Japanese proverb]


From onurb at xiludom.gro  Wed Apr 13 04:03:57 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Wed, 13 Apr 2005 10:03:57 +0200
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <mailman.1763.1113316016.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<8qan515t9sedgbp954fj85jvu0tc2171ec@4ax.com>
	<mailman.1763.1113316016.1799.python-list@python.org>
Message-ID: <425cd26f$0$6504$636a15ce@news.free.fr>

Ivan Van Laningham wrote:
> Hi All--
> 
> Richie Hindle wrote:
> 
>>[Xah]
>>
>>>motherfucking ... fucking ... fucking ... fucking ... fuck ... fucking
>>>fucking ... fucking ... mother fucking ... fucking ... piece of shit ...
>>>motherfucking ... fucking ... fucking ... big asshole ... masturbation ...
>>>Fucking morons ... fucking stupid ... fuckhead coders ... fuckheads ...
>>>you fucking asses.
>>
>>>paypal me a hundred dollars and i'll rewrite the whole re doc in a few
>>>hours.
>>
>>Can we paypal you a hundred dollars to leave us alone?  I'll pledge $10.
>>Are there another nine people here who'll do the same?
>>
>>
> 
> Why don't we pay him $100 to re-write the PERL docs?

+1 !

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


From enleverlesO.OmcO at OmclaveauO.com  Sun Apr 24 15:03:58 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Sun, 24 Apr 2005 21:03:58 +0200
Subject: Using Ming on Windows
References: <mailman.2354.1114287225.1799.python-list@python.org>
Message-ID: <426bf7ce$0$25055$8fcfb975@news.wanadoo.fr>

Hi !

You can to generate SWF (flash) files, with swfobjs.dll

See :
   http://bukoo.sourceforge.net
and
   http://www.angelfire.com/nt/teklord/swfexport.htm


I succeeded, therefore, it is easy...


Michel Claveau



 




From gabriel.cooper at mediapulse.com  Tue Apr 12 11:32:58 2005
From: gabriel.cooper at mediapulse.com (Gabriel Cooper)
Date: Tue, 12 Apr 2005 11:32:58 -0400
Subject: Better access to database search results
Message-ID: <425BEA2A.6020302@mediapulse.com>

Usually when I access db search results it's something like this:

cursor.execute("select A1,A2,A3,A4 from B where C")
for (a1,a2,a3,a4) in cursor.fetchall():
    stuff()

But sometimes the point at which I use the data returned is not with the 
search, and so having the ability to access the results as a dictionary 
is more useful. I know that with MySQLdb I can open the connection and 
have it return a dictionary, but when only one search out of all the 
requests needs to be that way, it seems too much hassle to get a new 
cursor just for that. Also, as a web developer that uses python, my 
designers cognate "name.attribute" much easier than "name['attribute']" 
and so I came up with this function to help us both out.

Let me know what you think. Could this be done simpler?

def convert_cursor(cursor):
    '''Converts a cursor object with a result set in tuples to a list of
    dicts, where the members of the keys are the field names, and the 
values are
    the field values.'''
                                                                                                                            

    fields = map(lambda x: x[0], cursor.description)
                                                                                                                           

    class DictObj(dict):
        '''
        DictObj is a normal dictionary that allows you to access its members
        via ``var[key]`` as well as ``var.key``.
        '''
        def __init__(self,dic):
            dict.__init__(self,dic)
            self.__dict__ = self
                                                                                                                            

    return [DictObj(zip(fields,x)) for x in cursor.fetchall()]



From roy at panix.com  Fri Apr 22 10:51:56 2005
From: roy at panix.com (Roy Smith)
Date: 22 Apr 2005 10:51:56 -0400
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<3cr2caF6locm6U1@individual.net>
	<roy-41B7B8.22172521042005@reader1.panix.com>
	<3csdegF6p6jpnU1@individual.net>
Message-ID: <d4b32c$mo7$1@panix2.panix.com>

In article <3csdegF6p6jpnU1 at individual.net>,
Reinhold Birkenfeld  <reinhold-birkenfeld-nospam at wolke7.net> wrote:
>Roy Smith wrote:
>
>> import types
>> 
>> class slicableDict (dict):
>>     def __getitem__ (self, index):
>>         if type (index) == types.SliceType:
>>             d2 = slicableDict()
>>             for key in self.keys():
>>                 if key >= index.start and key < index.stop:
>>                     d2[key] = self[key]
>>             return d2
>>         else:
>>             return dict.__getitem__ (self, index)
>[...]
>
>> Roy-Smiths-Computer:play$ ./slice.py
>> {'oysters': 4, 'hen': 1, 'porpoises': 5, 'geese': 3, 'ducks': 2}
>> {'hen': 1, 'geese': 3, 'ducks': 2}
>> 
>> I defined d[x:y] as returning a new dictionary which contains those items 
>> from the original whose keys are in the range x <= key < y.  I'm not sure 
>> this is terribly useful but it's a neat demonstration of just how simple 
>> Python makes it to do stuff like this.  I can't imagine how much work it 
>> would be to add a similar functionality to something like C++ multimap.
>
>Other possibility, probably faster when almost all keys in the range are in
>the dictionary:
>
>class sdict(dict):
>    def __getitem__(self, index):
>        if isinstance(index, slice):
>            d = {}
>            for key in xrange(slice.start, slice.stop, slice.step):
>                if key in self:
>                    d[key] = self[key]
>            return d
>        else:
>            return dict.__getitem__(self, index)

The problem with that is it requires the keys to be integers.


From neil.benn at arcor.de  Sat Apr  2 06:08:25 2005
From: neil.benn at arcor.de (Neil Benn)
Date: Sat, 02 Apr 2005 13:08:25 +0200
Subject: Simple thread-safe counter?
In-Reply-To: <7xsm29txzu.fsf@ruckus.brouhaha.com>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>	<mailman.1224.1112418208.1799.python-list@python.org>
	<7xsm29txzu.fsf@ruckus.brouhaha.com>
Message-ID: <424E7D29.7010608@arcor.de>

Paul Rubin wrote:

>Skip Montanaro <skip at pobox.com> writes:
>  
>
>>How about (untested):
>>
>>    import Queue
>>    counter = Queue.Queue()
>>    counter.put(0)
>>    def f():
>>        i = counter.get()
>>        counter.put(i+1)
>>        return i
>>    
>>
>
>Hmmm, that's a bit messier than I hoped for, but it looks sure to work.
>
>I think for my immediate requirement, I'm going to use xrange as Tim
>suggested.  However, I can't be sure that will work in non-GIL
>implementations.
>  
>
Hello,

          Simple xrange stuff won't work in Jython as Sython is running 
on a JVM which doesn't have a GIL kinda thing.  If you wanna return a 
sequential number then you'll need something like :

<PSEUDO CODE>

class COUNTER:
    DOC : THIS WILL RETURN AN INCRMENTING LIST OF NUMBERS - THREAD SAFE.

    FUNCTION INIT:
      OBJRLOCK= RLOCK()
      INTRETURNNUM = 0

    FUNCTION NEXT
        TRY{
            RLOCK.AQUIRE
        }FINALLY{
           RLOCK.RELEASE
        }

</PSUEDO CODE>

    That basically all you'll need, if you make it iteratable of 
whatever - you need to wrap the business end of what you are doing 
around a recursive lock.  Personally I dislike the GIL so I avoid 
writing code that takes advantages of it.

    Why psuedo code - this is similar to python code I know but it means 
I'm not posting untested python code!!

Cheers,

Neil


From cam.ac.uk at mh391.invalid  Sat Apr  9 05:46:13 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 09 Apr 2005 10:46:13 +0100
Subject: How to check whether a  list have specific value exist or not?
In-Reply-To: <mailman.1608.1113039151.1799.python-list@python.org>
References: <mailman.1608.1113039151.1799.python-list@python.org>
Message-ID: <d38895$u5$2@gemini.csx.cam.ac.uk>

praba kar wrote:

> In Php we can find in_array() function
> which function is mainly useful to check
> whether a specific value is exist in the array
> or not.
> 
> But In python In cannot find any function
> like that.

If you just want a boolean result you can use x in l:

 >>> l = range(5)
 >>> l
[0, 1, 2, 3, 4]
 >>> 3 in l
True
 >>> 42 in l
False
-- 
Michael Hoffman


From fred.dixon at gmail.com  Mon Apr 11 16:36:13 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 11 Apr 2005 13:36:13 -0700
Subject: The convenient compiler for Python Apps and Distribution of it
In-Reply-To: <1113251280.923895.51860@l41g2000cwc.googlegroups.com>
References: <1113251280.923895.51860@l41g2000cwc.googlegroups.com>
Message-ID: <1113251773.394507.88960@o13g2000cwo.googlegroups.com>

google for cx_freeze
nevermind, here
http://starship.python.net/crew/atuining/cx_Freeze/
linux and windows



From smokerdude66 at myway.com  Thu Apr 28 09:59:10 2005
From: smokerdude66 at myway.com (MC05)
Date: Thu, 28 Apr 2005 06:59:10 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
Message-ID: <3dc8hjF6s5i2uU1@individual.net>


"Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message 
news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>
> 4) I doubt seriously whether God plays a guitar, since guitars are made by 
> men, for men.  His Son could theoretically play a guitar.  Perhaps He 
> does. Perhaps He doesn't.  Only the Father and His Holy Angels know.

So then Lucifer was a wicked bass player whose sex and drugs and rock n roll 
alientated the rest of the band and was fired? 




From martin at v.loewis.de  Sat Apr  9 07:46:11 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 09 Apr 2005 13:46:11 +0200
Subject: Text & Unicode processing references on the web.
In-Reply-To: <mailman.1594.1113009034.1799.python-list@python.org>
References: <mailman.1594.1113009034.1799.python-list@python.org>
Message-ID: <4257C083.3060902@v.loewis.de>

anthony hornby wrote:
> Can anyone point out some good "Python & Unicode" and "Python & Text
> processing" resources on the net to get me started? Any good book
> recommendations?

As a quick Unicode tutorial, I'd recommend

http://www.jorendorff.com/articles/unicode/python.html
http://www.egenix.com/files/python/Unicode-EPC2002-Talk.pdf

For text processing, you should read the "Strings" section of the
library reference:

http://www.python.org/doc/current/lib/strings.html

Notice there is also a separate section on SGML/XML

http://www.python.org/doc/current/lib/markup.html

PyXML has its own documentation page, on

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

As for book recommendations: What language? I would recommend

Fischbeck, v. L?wis: Python 2

:-) It covers all of these topics.

Regards,
Martin


From Mccormick.Johnw at epamail.epa.gov  Mon Apr 11 12:03:18 2005
From: Mccormick.Johnw at epamail.epa.gov (Mccormick.Johnw at epamail.epa.gov)
Date: Mon, 11 Apr 2005 12:03:18 -0400
Subject: Sockets (Dave Brueck)
Message-ID: <OF30BA6FFD.1FA7068F-ON85256FE0.00581515-85256FE0.0058318C@epamail.epa.gov>


Hello, ... I am John McCormick (Systems Programmer ) and I am currently
working on a python program which will connect (user) specified inputs
and connect them to (user) selected outputs (like screen or
video/audio-recording devices) and would like to know if there's a
technique to "test" or "sense" if the desired output device is busy
without interrupting the output device while checking to see if it's
busy... ?? If, perhaps, python does not have this type of feature, I
wonder if you could give me some type of direction (ie., manufacturer's
device response checking techniques that could be used in conjunction
with python) but the bottom line is not to "crash" or interrupt the
desired output device (if it's still busy)...

Thank You



John McCormick



##############################################
John W. McCormick, Systems Programmer / DBA
High Performance Computing & Scientific Visualization
Lockheed Martin Information Technology, Supporting the EPA
Research Triangle Park, NC
919-541-0890

Federal Infrastructure Contact - Ravi Nair
919-541-5467    -  nair.ravi at epa.gov
Federal Infrastructure Contact - Joe Retzer, Ph.D.
919-541-4190    -  retzer.joseph at epa.gov



From rdm at rcblue.com  Wed Apr 13 07:56:04 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 04:56:04 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <1113390479.738210.49530@z14g2000cwz.googlegroups.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
Message-ID: <6.2.1.2.2.20050413044454.04402eb0@rcblue.com>

Dan Bishop wrote at 04:07 4/13/2005:
>(3) A function for converting numbers to their base-12 representation.
>
>For integers, this can be done with:
>
>DIGITS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
>def itoa(num, radix=10):
>    is_negative = False
>    if num < 0:
>       is_negative = True
>       num = -num
>    digits = []
>    while num >= radix:
>       num, last_digit = divmod(num, radix)
>       digits.append(DIGITS[last_digit])
>    digits.append(DIGITS[num])
>    if is_negative:
>       digits.append("-")
>    digits.reverse()
>    return ''.join(digits)

I see this works perfectly for integers. Thanks!

>For a floating-point number x, the representation with d "decimal"
>places count be found by taking the representation of int(round(x *
>radix ** d)) and inserting a "." d places from the right.

But I'm sorry, but I can't follow you. I do have the first 10000 or so 
places of pi base 10 (<http://mathwithmrherte.com/pi_digits.htm>), but 
could you show me what to do with, say, just 3.14159?

I apologize for being so dense.

Dick Moores
rdm at rcblue.com




From finite.automaton at gmail.com  Wed Apr 27 16:39:15 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 27 Apr 2005 13:39:15 -0700
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
Message-ID: <1114634355.348110.141690@o13g2000cwo.googlegroups.com>

Might as well make a class for Book instead of dealing with buckets of
lists...

class Book(object):
    def __init__(self, title, author, publisher, isbn, date):    # add
more fields according to CSV
        self.__dict__.update(locals())  # lazy!
    def __repr__(self):
        return '<"%s" by %s>' % (self.title, self.author)

def read_books(filename):
    import csv   #   (this battery is included)
    csv_file = open(filename, "rb")
    reader = csv.reader(csv_file)
    books = [Book(*[field.strip() for field in row]) for row in reader]
    csv_file.close()
    return books

if __name__ == '__main__':
    books = read_books("my_csv_file.csv")
    import operator

    # example - Sort by author
    books.sort(key = operator.attrgetter("author"))
    
    for book in books:
        print book



From beliavsky at aol.com  Tue Apr 12 14:15:12 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 12 Apr 2005 11:15:12 -0700
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
	<du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
	<1113307867.975905.300380@l41g2000cwc.googlegroups.com>
	<mailman.1767.1113319471.1799.python-list@python.org>
Message-ID: <1113329712.395343.246140@o13g2000cwo.googlegroups.com>

Brian van den Broek wrote:
> beliavsky at aol.com said unto the world upon 2005-04-12 08:11:
>
> <SNIP>
>
> > I actually like the Windows cmd language (it's an acquired taste),
but
> > I have read it is going away in Windows Longhorn (WH). That's an
> > argument for writing more complicated scripts in Python. WH is
supposed
> > to get a much better shell, called Monad, inspired by the
philosophy of
> > Gottfried Wilhelm Leibniz :).
>
> Hi all,
>
> this is the first I've heard of Monad.
>
> Leibniz characterized his monads as the fundamental building blocks
of
> nature, insusceptible of change from the outside, and as
"windowless".
>
> So, if the account of MS's plans is true, it would seem to indicate a

> combination of arrogance, honesty, and ignorance. (I leave it to you
> to decide which part, if any, of this triad, is surprising.)
>
> Best to all,
>
> Brian vdB

I was joking about Leibniz, but from the Wikipedia article
http://en.wikipedia.org/wiki/MSH_(shell) it appears that the codename
of the new Microsft shell was in small part inspired by the philosophy
of Leibniz:

"Central concepts
The system's codename comes from Gottfried Leibniz's "Monadology", a
philosophy which says that everything is a composition of fundamental
elements called 'Monads', which are all integrated together in
'pre-established harmony'. Similarly, the focus of MSH is on
composition of complex tasks from a series of components. In this case,
the components are special programs called commandlets (or cmdlets),
which are .NET classes designed to use the features of the environment.
The key difference between the Unix approach and the MSH one is that
rather than creating a "pipeline" based on textual input and output,
MSH passes data between the various commandlets as arbitrary objects.

If accessed individually from the command-line, a commandlet's output
will automatically be converted into text, but if its output is to be
used by another commandlet, it will be converted into whatever form of
object is most appropriate for that commandlet's input. This has the
advantage of eliminating the need for the many text-processing
utilities which are common in Unix pipelines, such as grep and awk, as
well as allowing things to be combined interactively, or in a scripting
environment, which would otherwise require a more complex programming
language. For instance, a listing of processes will consist not of text
describing them, but objects representing them, so that methods can be
called on those objects without explicit reference to any outside
structure or library.

MSH is part of an overall strategy within Longhorn to treat all parts
of the OS as .NET objects, and thus allow the user greater flexibility
over how they are used. This is aimed to make previously complex
interactions manageable within the bounds of frameworks such as MSH;
for example, Longhorn's registry can be exported as though it were a
filesystem, and navigated by treating it as a hierarchy of files and
directories."



From m at m.com  Tue Apr 26 19:04:21 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 07:04:21 +0800
Subject: Can .py be complied?
Message-ID: <426ec8f7_2@rain.i-cable.com>

Hi all, I am new to programming, already have a glace on introduction of
c++, java and finally decided on python. But I found that the .py file is
just like the source file, how can I make a program without revealing its
source? (may be my question is a little bit stupid)




From theller at python.net  Wed Apr  6 16:20:54 2005
From: theller at python.net (Thomas Heller)
Date: Wed, 06 Apr 2005 22:20:54 +0200
Subject: Problem with access to shared memory(W2K) / ORIGINALLY (win32)
 speedfan api control
References: <3bilaqF6in0icU1@individual.net> <hdijzrny.fsf@python.net>
	<3birmbF6bhm54U1@individual.net>
Message-ID: <y8bvy7vd.fsf@python.net>

"Claudio Grondi" <claudio.grondi at freenet.de> writes:

>> For the mistake you made see below, hope that helps.
> It doesn't.
>
>> >     pBuf_buf = cast(pBuf, Buffer)
>> Here's the problem.  pBuf is a pointer to a Buffer structure, not the
>> buffer structure itself.
>> Something like
>>     pBuf_buf = Buffer.from_address(pBuf)
>> may work.
> If I currently understand it right, cast() should
> do exactly this, i.e. should write the content
> pointed to by pBuf to a Python variable
> pBuf_buf which is an object of the Buffer
> class, where I can access the single
> components like any other Python
> variables - am I right or wrong?

You are right - my bad.
pBuf is a pointer to your structure, so:

ptr = cast(pBuf, POINTER(Buffer))
print ptr # should print <ctypes.LP_Buffer object at ...>
struct = ptr[0]

and now 'struct' should contain the data that you need.

>> For the general way to solve this problem you should know that you can
>> access a shared memory area with a certain name also with Python's mmap
>> module, although that is probably not documented very good.  There was a
>> recipe posted a few days ago which showed different ways to acces shared
>> memory, with or without ctypes.
>
>> > The code I use is provided also here:
>> >  http://www.codecomments.com/Python/message430495.html
>> >  http://mail.python.org/pipermail/python-list/2005-March/271853.html
>> > (the mmap part of it doesn't work at all)
>
> So I am already using the recipe, right?
> But it doesn't work as expected.
> mmap doesn't work at all failing in
> shmem = mmap.mmap(0, 0, "$M$B$M$5$S$D$", mmap.ACCESS_READ)
> with WindowsError: [Errno 87] wrong parameter

I get this error when I try to open a non-existing shared memory block.
>From the mmap docs: 

  If length is 0, the maximum length of the map is the current size of
  the file, except that if the file is empty Windows raises an exception
  (you cannot create an empty mapping on Windows).

If I run it with non-zero length it does not raise an exception

  shmem = mmap.mmap(0, 0, "$M$B$M$5$S$D$", mmap.ACCESS_READ)

although it *creates* the shared memory block, IIUC.  Are you sure your
speedfan app is running when you get the WindowsError?

Thomas


From fredrik at pythonware.com  Tue Apr  5 12:46:21 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 5 Apr 2005 18:46:21 +0200
Subject: regexp weirdness (bug?)
References: <1112715308.737856.234580@z14g2000cwz.googlegroups.com>
	<2584344.b1EHUGjtUV@news.perlig.de>
Message-ID: <d2uf84$fsd$1@sea.gmane.org>

Andr? Malo wrote:

> No, I suppose they shouldn't compile.
> _re_pair should be (?P=plus).

the (?(NAME)RE|RE) form was added in 2.4.

looks like a bug to me; the "plus" group is set to "+" in all four cases, so the
final pattern should match.  but I might be missing something...

</F> 





From WLigtenberg at gmail.com  Sat Apr 23 16:20:17 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Sat, 23 Apr 2005 22:20:17 +0200
Subject: XML file parsing with SAX
References: <pan.2005.04.23.13.19.59.910355@gmail.com>
	<mailman.2353.1114285733.1799.python-list@python.org>
Message-ID: <pan.2005.04.23.20.20.15.673369@gmail.com>

I didn't make the XML file. And I don't like messing with other peoples
data. So I just want my SAX parser to ignore it. I can't help if other
people make it hard for me to read their xml file...

On Sat, 23 Apr 2005 13:48:49 -0600, Uche Ogbuji wrote:

> On Sat, 2005-04-23 at 15:20 +0200, Willem Ligtenberg wrote:
>> I decided to use SAX to parse my xml file.
>> But the parser crashes on:
>>   File "/usr/lib/python2.3/site-packages/_xmlplus/sax/handler.py", line 38, in fatalError
>>     raise exception
>> xml.sax._exceptions.SAXParseException: NCBI_Entrezgene.dtd:8:0: error in processing external entity reference
>> 
>> This is caused by:
>> <!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN"
>> "NCBI_Entrezgene.dtd">
>> 
>> If I remove it, it parses normally.
>> I've created my parser like this:
>> import sys
>> from xml.sax import make_parser
>> from handler import EntrezGeneHandler
>> 
>> fopen = open("mouse2.xml", "r")
>> ch = EntrezGeneHandler()
>> saxparser = make_parser()
>> saxparser.setContentHandler(ch)
>> saxparser.parse(fopen)
>> 
>> And the handler is:
>> from xml.sax import ContentHandler
>> 
>> class EntrezGeneHandler(ContentHandler):
>> 	"""
>> 	A handler to deal with EntrezGene in XML
>> 	"""
>> 	
>> 	def startElement(self, name, attrs):
>> 		print "Start element:", name
>> 
>> So it doesn't do much yet. And still it crashes...
>> How can I tell the parser not to look at the DOCTYPE declaration.
>> On a website:
>> http://www.devarticles.com/c/a/XML/Parsing-XML-with-SAX-and-Python/1/
>> it states that the SAX parsers are not validating, so this error shouldn't
>> even occur?
> 
> Just because it's not validating doesn't mean that the parser won't try
> to read the external entity.
> 
> Maybe you're looking for 
> 
> """
> feature_external_ges
>         Value: "http://xml.org/sax/features/external-general-entities" 
>         true: Include all external general (text) entities. 
>         false: Do not include external general entities. 
>         access: (parsing) read-only; (not parsing) read/write
> """
> 
> Quote from:
> 
> http://docs.python.org/lib/module-xml.sax.handler.html
> 
> But you're on pretty shaky ground in any XML 1.x toolkit using a bogus
> DTDecl in this way.  Why go through the hassle?  Why not use a catalog,
> or remove the DTDecl?



From fredrik at pythonware.com  Sun Apr 10 15:16:27 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 10 Apr 2005 21:16:27 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>
	<4258e5e6$0$3407$9b622d9e@news.freenet.de>
Message-ID: <d3btt3$6ho$1@sea.gmane.org>

Martin v. L?wis wrote:

> For a number of libraries added recently, I heard lots of complaints
> how terrible they are to use, including, in particular, the XML
> and logging libraries, and the Unicode type, and that "something
> else" is so much easier to use. Why is it that the authors of
> "something else" never contribute it to Python?

because we're not willing to go through endless PEP processes,
generate patches that end up sitting on sourceforge for years, deal
with shitstorms initiated by developers of "competing" libraries, sign
over our copyrights to the PSF, loose control over the code base,
seeing the code being forked into several incompatible versions,
and so on ?

(I'd rather spend that energy on developing new stuff.)

</F>





From sjmachin at lexicon.net  Thu Apr 21 18:31:29 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 22 Apr 2005 08:31:29 +1000
Subject: How can I verify that a passed argument is an interible
	collection?
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
	<4267BFEA.9070206@syscononline.com>
Message-ID: <t89g61hb6vna4294e19tb5b6hqint6l9m2@4ax.com>

On Thu, 21 Apr 2005 09:59:54 -0500, Larry Bates
<lbates at syscononline.com> wrote:

>2) Or if you not you could see if the argument has next and
>__iter__ methods (more general solution)
>
>if  hasattr(arg, 'next') and not hasattr(arg, '__iter__'):
>    # perform work on iterable
>
>else:
>    print "arg must be an iterable"
>


>>> alist = ['Think', 'before', 'posting!']
>>> hasattr(alist, 'next')
False

===>>> Fails the first leg of your test for iterability.

>>> for wd in alist:
...     print wd
...
Think
before
posting!

===>>> Looks iterable to me!!

In any case, trying to define "isiterable(x)" in terms of x having or
not having particularly-named attributes doesn't seem to me to be a
very good idea. It's what the method *does* that matters. Other ways
of doing it may be invented. Such a definition has about the same
level of future-proof correlation between cause and effect as "We
waved a dead chicken at the volcano and it stopped erupting".

Cheers,
John




From theller at python.net  Mon Apr 11 11:49:03 2005
From: theller at python.net (Thomas Heller)
Date: Mon, 11 Apr 2005 17:49:03 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
Message-ID: <is2tmhzk.fsf@python.net>

Michael Kearns <michael.kearns at REMOVEsaaconsultants.com> writes:

> I've been using python to write a simple 'launcher' for one of our
> Java applications for quite a while now. I recently updated it to use
> python 2.4, and all seemed well.
>
> Today, one of my colleagues noted that on her machine the launcher
> would complain it was missing a DLL - msvcr71.dll
>
> However, there's a very grey area concerning the redistribution of said DLL.
>
> If you've been keeping up with the dev list, and some other web
> discussions, you'll see that this has cropped up several times, but
> with no conclusion in a legal fashion other than 'investigate it on
> your own legal terms'.
>
> I'm now going to have step back to using 2.3 until this issue is
> solved, but judging by the way the dev list discussion just faded, I
> get the impression that it may be a long wait.
>
> I can't see how any company (or individual) can distribute an
> application written in python, and then 'frozen' (I used py2exe) in
> any way if they rely on the python24.dll that ships as standard. This
> is surely a step backwards in usability.

For commercial development, it should not be a problem to buy a license
for MSVC 7.1, which gives you the right to distribute msvcrt71.dll.

And maybe that's the reason that few people care about this issue?

Thomas


From rodney.maxwell at gmail.com  Sun Apr 17 18:41:21 2005
From: rodney.maxwell at gmail.com (Rodney Maxwell)
Date: 17 Apr 2005 15:41:21 -0700
Subject: python.exe on Mac OS X!?
Message-ID: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>

I did a source code build of Python 2.4.1 on OS X (10.3.8) and the
executable produced was 'python.exe'. Can someone tell me whether this
is a bug, feature, or UserError?

% ./configure
<snip>
% make
<snip>
% ./python.exe
Python 2.4.1 (#1, Apr 17 2005, 12:14:12)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
>>>



From jlenton at gmail.com  Fri Apr 15 15:25:18 2005
From: jlenton at gmail.com (John Lenton)
Date: 15 Apr 2005 12:25:18 -0700
Subject: module placeholder
Message-ID: <1113593118.866496.23030@l41g2000cwc.googlegroups.com>

Once again I'm working on code that has several 'providers' of
different features, and I thought I'd ask the list what better
solutions it has to this other than what I've come up with.

Currently, the cleanest way I can find is to say

  import foo
  foo.config(bar='baz')
  # from this point on, foo.bar is provided by foo.bars.baz

this could be widget sets, database connectors, persistance layers,
RPC, you name it. This is very easy to do:

  # foo.py
  def config(bar_name=DEFAULT_BAR_NAME):
      global bar
      bar =  __import__('foo.' + bar_name, globals(), locals(),
bar_name)

This would work fine if people wanted to use this (once its configured)
as 'import foo; foo.bar.funkyFunction()', but no! they want to be able
to do 'from foo.bar import funkyFunction', which is reasonable really
because I'm just as lazy as they are.

So what I've come up with is

  def config(bar_name=DEFAULT_BAR_NAME):
      global bar
      barModule =  __import__('foo.' + bar_name, globals(), locals(),
bar_name)
      bar.faultFrom(barModule)

  class proxyModule(new.module):
     def faultFrom(self, other):
        self.__other = other
        self.__name__ = other.__name__
        self.__file__ = other.__file__ + ' [proxied]'
    def __getattr__(self, attr):
        return getattr(self.__other, attr)

  bar = proxyModule('bar proxy')

and this is the bit that feels ugly: is there a better way to have an
object that can be imported from a file and that behaves like a module,
but that isn't filled in until some point down the road?



From bronger at physik.rwth-aachen.de  Fri Apr  1 08:20:08 2005
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 01 Apr 2005 15:20:08 +0200
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
Message-ID: <87is3663cn.fsf@wilson.rwth-aachen.de>

Hall?chen!

Daniel Silva <dsilva at ccs.neu.edu> writes:

> Shriram Krishnamurthi has just announced the following elsewhere; it might
> be of interest to c.l.s, c.l.f, and c.l.p:
> http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html
>
>
>                 The Fate Of LAMBDA in PLT Scheme v300
>                                  or
>                   Lambda the Ultimate Design Flaw
>
> About 30 years ago, Scheme had FILTER and MAP courtesy of Lisp
> hackers who missed them from their past experience.  To this
> collection, Scheme added a lexically-scoped, properly-functioning
> LAMBDA.  But, despite of the PR value of anything with Guy
> Steele's name associated with it, we think these features should
> be cut from PLT Scheme v300.
>
> [...]

The whole text seems to be a variant of
<http://www.artima.com/weblogs/viewpost.jsp?thread=98196>.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus


From syd.diamond at gmail.com  Mon Apr  4 17:23:10 2005
From: syd.diamond at gmail.com (syd)
Date: 4 Apr 2005 14:23:10 -0700
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
Message-ID: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>

I don't even know where to begin.  This is just bizarre.  I just picked
up the Gnuplot.py module (a light interface to gnuplot commands) and
was messing around with it today.

I've got a tiny script, but it only works from the command line about
half the time!  In the python interpreter, 100%.   Ipython, 100%.  I'm
not kidding.

#!/bin/env python
import Gnuplot
g = Gnuplot.Gnuplot(debug=1)
g.title('A simple example')
g('set data style linespoints')
g('set terminal png small color')
g('set output "myGraph.png"')
g.plot([[0,1.1], [1,5.8], [2,3.3], [3,100]])

Here's just one example -- it does not work, then it works.  It seems
totally random.  It will work a few times, then it won't for a few
times...

bash-2.05b$ ./myGnu.py
gnuplot> set title "A simple example"
gnuplot> set data style linespoints
gnuplot> set terminal png small color
gnuplot> set output "myGraph.png"
gnuplot> plot '/tmp/tmp5LXAow' notitle

gnuplot> plot '/tmp/tmp5LXAow' notitle
              ^
         can't read data file "/tmp/tmp5LXAow"
         line 0: util.c: No such file or directory

bash-2.05b$ ./myGnu.py
gnuplot> set title "A simple example"
gnuplot> set data style linespoints
gnuplot> set terminal png small color
gnuplot> set output "myGraph.png"
gnuplot> plot '/tmp/tmpHMTkpL' notitle

(and it makes the graph image just fine)

I mean what the hell is going on?  My permissions on /tmp are wide open
(drwxrwxrwt).  It does the same thing when I run as root.  And it
_always_ works when I use the interpreter or interactive python.

Any clues would be greatly appreciated.  I'm baffled.



From buhrt at iquest.net  Thu Apr 28 01:20:35 2005
From: buhrt at iquest.net (buhrt at iquest.net)
Date: Thu, 28 Apr 2005 12:20:35 +0700
Subject: Mail Transaction Failed
Message-ID: <20050428052102.58B3C1E400D@bag.python.org>

The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: readme.zip
Type: application/octet-stream
Size: 22 bytes
Desc: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20050428/1de153bc/attachment.obj>

From could.net at gmail.com  Sun Apr 24 21:50:00 2005
From: could.net at gmail.com (could ildg)
Date: Mon, 25 Apr 2005 09:50:00 +0800
Subject: Parsing data from URL
In-Reply-To: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>
References: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>
Message-ID: <311b5ce10504241850779d81d2@mail.gmail.com>

I think it depends on the server

On 24 Apr 2005 17:24:18 -0700, Harlin Seritt <harlinseritt at yahoo.com> wrote:
> I am trying to do the following:
> 
> <of course website.com is not the actual site>
> 
> import urllib
> 
> url = 'http://www.website.com/file.shtml'
> dat = urllib.urlopen(url, 'r').read()
> print dat
> 
> When I do so, I get the following data:
> 
> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> <HTML><HEAD>
> <TITLE>405 Method Not Allowed</TITLE>
> </HEAD><BODY>
> <H1>Method Not Allowed</H1>
> The requested method POST is not allowed for the URL <P>
> <HR>
> <ADDRESS>Apache/1.3.27 Server at website.com Port 80</ADDRESS>
> </BODY></HTML>
> 
> How can I make sure that I get the actual html data instead of the data
> from redirected URL?
> 
> thanks,
> 
> Harlin
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From tjreedy at udel.edu  Sun Apr  3 18:31:27 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 3 Apr 2005 18:31:27 -0400
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com><114pqf31isr8k4d@news.supernews.com><roy-FBA61C.08212501042005@reader1.panix.com><1112372685.034751.99410@o13g2000cwo.googlegroups.com><L2k3e.23850$w63.1398227@news20.bellglobal.com><1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca>
	<%Fl3e.1804$7b.990@trndny01><_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
	<WKt3e.1908$7b.429@trndny01><6I-dnbpiIZJNJNPfRVn-hA@powergate.ca><6oQ3e.10378$db.6219@trndny07>
	<7x3bu8t7or.fsf@ruckus.brouhaha.com>
Message-ID: <d2pqoj$ljv$1@sea.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7x3bu8t7or.fsf at ruckus.brouhaha.com...
> "Raymond Hettinger" <vze4rx4y at verizon.net> writes:
>> When writing a large suite, you quick come to appreciate being able
>> to use assert statements with regular comparision operators, debugging
>> with normal print statements, and not writing self.assertEqual over and
>> over again.  The generative tests are especially nice.
>
> But assert statements vanish when you turn on the optimizer.  If
> you're going to run your application with the optimizer turned on, I
> certainly hope you run your regression tests with the optimizer on.

I don't see why you think so.  Assertion statements in the test code make 
it harder, not easier for the test to pass.  Ditto, I believe, for any in 
the run code, if indeed there are any.

Terry J. Reedy





From mwm at mired.org  Mon Apr 11 22:49:15 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 11 Apr 2005 21:49:15 -0500
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
	<86k6nbww6z.fsf@guru.mired.org> <d39ooc$pvr$1@panix1.panix.com>
Message-ID: <861x9gwvys.fsf@guru.mired.org>

aahz at pythoncraft.com (Aahz) writes:

> In article <86k6nbww6z.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>>aahz at pythoncraft.com (Aahz) writes:
>>>
>>> Use vim.  80% of the power of emacs at 20% of the learning curve.
>>
>>Hmm. Can I read mail/news/web pages in vim? I can in emacs.
> Yup, that's why emacs stands for Eighty Megabytes And Constantly
> Swapping.  ;-)

Gee, it's changed from eight to eighty. Probably because eight is a
small app by todays standards. Then again, it's not like 80 is large
these days.

Of course, you don't have to load any of the code for doing those
things if you don't want to use it.

>>Emacs is a computing environment. I read mail and news in it, so I
>>don't have to worry about learning some applications custom editor
>>(ok, a good MUA/newsreader will invoke my favorite editor - but that's
>>Emacs, so why bother). I use emacs for the heavy lifting.
>
> Doesn't work so well when you want to use an application that isn't
> emacs, yet still invoke a custom editor.  But yeah, if you consider emacs
> a Way of Life, then you're making sense.

You tell those applications to use emacsclient as the editor, and add
(gnuserv-start) to your emacs init file. This is especially usefull
when running applications that want to start an editor in a shell
window in emacs.

       <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From michaels at rd.bbc.co.uk  Wed Apr 13 11:19:26 2005
From: michaels at rd.bbc.co.uk (Michael Sparks)
Date: Wed, 13 Apr 2005 16:19:26 +0100
Subject: Kamaelia 0.1.2 Released
Message-ID: <d3jdhn$e0v$2@nntp0.reith.bbc.co.uk>

Kamaelia 0.1.2 has been released!


What is it?
===========
Kamaelia is a collection of Axon components designed for network
protocol experimentation in a single threaded, select based environment.
Axon components are python generators are augmented by inbox and outbox
queues (lists) for communication in a communicating sequential processes
(CSP) like fashion.

The architecture is specifically designed to try and simplify the
process of designing and experimenting with new network protocols in
real environments.

This release contains components allowing the creation of TCP based
clients and servers, and includes a few (very) simple protocol handlers
to show usage.

Other components include vorbis decode and playback, asynchronous file
reading, and equivalents of "tee" and "strings". (Writing systems is
much like building unix pipelines, hence the need for similar tools)

The system is known to work under Linux, Mac OS X, Windows and a subset
works on Series 60 mobiles.

We've also started a weblog which will form an informal discussion forum
for issues generally surrounding kamaelia. (We might put things like
tutorials there for example)
   * http://kamaelia.sourceforge.net/cgi-bin/bl


What's new in version 0.1.2 ?
=============================

Additionally tested under Windows ME, 2000 and Mac OS X, along with
a subset tested on Series 60 mobiles and compatibility updates made
as a result. Ability to make simple multicast servers, clients and
transceivers added. Test harnesses for network servers tightened up.

Collection of examples added in the Examples directory:
   * Example 1 : Contains a simple "FortuneCookie" protocol system.
     Includes a server and client as part of a single system.

   * Example 2 : This has much the same structure, but rather than serve
     and display fortune cookies, serves (ogg vorbis) audio over a TCP
     connection to a client which decodes and plays back the audio.

   * Example 3 : Splits the structure in example 2 into a specific
     server application and a client application. This puts the two
     halves at odds, *competing* with each other for CPU time. Thus if
     both are run on the same (single CPU) system you will hear audio
     breakage. If run on separate machines (as client and server(!)) you
     won't hear this. In practice, part of the issue is that there is no
     buffering in the receiver.

   * Example 4 : Simple multicast based streaming system. Since it uses
     raw ogg vorbis with no resends and no codebook facility, you will
     need to *start all the client machines first* and *then* the
     server. Uses the multicast transceiver object exclusively.

    
Requirements
============
   * Python 2.3 or higher recommended, though please do report any bugs
     with 2.2.
   * Axon (Any released version, 1.0.3 recommended, 1.0.4 when released)
   * vorbissimple (if you want to use the vorbis decode component)

(Both Axon and vorbissimple are separate parts of the Kamaelia project,
and available at the same download location - see below)


Platforms
=========
Kamaelia has been used successfully under both Linux, Windows and Mac OS
X. A subset of Kamaelia has been successfully tested on Series 60 Nokia
mobiles when used with the Axon SERIES 60 branch.

Where can I get it?
===================
Web pages are here:
   http://kamaelia.sourceforge.net/Docs/
   http://kamaelia.sourceforge.net/ (includes info on mailing lists)

ViewCVS access is available here:
   http://cvs.sourceforge.net/viewcvs.py/kamaelia/

Weblog
   * http://kamaelia.sourceforge.net/cgi-bin/bl


Licensing
=========
Kamaelia is released under the Mozilla tri-license scheme
(MPL/GPL/LGPL). Specifically you may choose to accept either
the Mozilla Public License 1.1, the GNU General Public License
2.0 or the Lesser General Public License 2.1. Proprietary terms
and conditions available upon request.

Best Regards,


Michael.
-- 
Michael.Sparks at rd.bbc.co.uk    
British Broadcasting Corporation, Research and Development
Kingswood Warren, Surrey KT20 6NP

This message (and any attachments) may contain personal views
which are not the views of the BBC unless specifically stated.




From sjmachin at lexicon.net  Mon Apr 18 01:21:44 2005
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 18 Apr 2005 15:21:44 +1000
Subject: Slight discrepancy with filecmp.cmp
References: <mailman.2039.1113797181.1799.python-list@python.org>
Message-ID: <hdf661dugeimek4tgesr863rgcb3gmh5dv@4ax.com>

On Sun, 17 Apr 2005 22:06:04 -0600, Ivan Van Laningham
<ivanlan at pauahtun.org> wrote:
[snip]
> So I wrote a set of
>programs to both index the disk versions with the cd versions, and to
>compare, using filecmp.cmp(), the cd and disk version.  Works fine. 
>Turned up several dozen files that had been inadvertantly rotated or
>saved with the wrong quality, various fat-fingered mistakes like that.
>
>However, it didn't flag the files that I know have bitrot.  I seem to
>remember that diff uses a checksum algorithm on binary files, not a
>byte-by-byte comparison.  Am I wrong?  

According to the docs:

"""
cmp( f1, f2[, shallow[, use_statcache]]) 

Compare the files named f1 and f2, returning True if they seem equal,
False otherwise. 
Unless shallow is given and is false, files with identical os.stat()
signatures are taken to be equal
"""

and what is an os.stat() signature, you ask? So did I.

According to the code itself:

def _sig(st):
    return (stat.S_IFMT(st.st_mode),
            st.st_size,
            st.st_mtime)

Looks like it assumes two files are the same if they are of the same
type, same size, and same time-last-modified. Normally I guess that's
good enough, but maybe the phantom bit-toggler is bypassing the file
system somehow. What OS are you running?

You might like to do two things: (1) run your comparison again with
shallow=False (2) submit a patch to the docs.

(-:
You have of course attempted to eliminate other variables by checking
that the bit-rot effect is apparent using different display software,
a different computer, an observer who's not on the same medication as
you, ... haven't you?
:-)


HTH,
John



From davidf at sjsoft.com  Wed Apr 20 04:55:18 2005
From: davidf at sjsoft.com (David Fraser)
Date: Wed, 20 Apr 2005 10:55:18 +0200
Subject: Behaviour of str.split
In-Reply-To: <3cm7t9F6nuiooU1@individual.net>
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
	<3cm7t9F6nuiooU1@individual.net>
Message-ID: <d455dk$spi$1@ctb-nnrp2.saix.net>

Greg Ewing wrote:
> Will McGugan wrote:
> 
>> Hi,
>>
>> I'm curious about the behaviour of the str.split() when applied to 
>> empty strings.
>>
>> "".split() returns an empty list, however..
>>
>> "".split("*") returns a list containing one empty string.
> 
> 
> Both of these make sense as limiting cases.
> 
> Consider
> 
>  >>> "a b c".split()
> ['a', 'b', 'c']
>  >>> "a b".split()
> ['a', 'b']
>  >>> "a".split()
> ['a']
>  >>> "".split()
> []
> 
> and
> 
>  >>> "**".split("*")
> ['', '', '']
>  >>> "*".split("*")
> ['', '']
>  >>> "".split("*")
> ['']
> 
> The split() method is really doing two somewhat different things
> depending on whether it is given an argument, and the end-cases
> come out differently.
> 
You don't really explain *why* they make sense as limiting cases, as 
your examples are quite different.

Consider
 >>> "a*b*c".split("*")
['a', 'b', 'c']
 >>> "a*b".split("*")
['a', 'b']
 >>> "a".split("*")
['a']
 >>> "".split("*")
['']

Now how is this logical when compared with split() above?

David


From mwm at mired.org  Sun Apr 24 19:07:43 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 24 Apr 2005 18:07:43 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
Message-ID: <86y8b7pydc.fsf@guru.mired.org>

John Bokma <postmaster at castleamber.com> writes:

> Mike Meyer wrote:
>> John Bokma <postmaster at castleamber.com> writes:
>>> Mike Meyer wrote:
>>>> Depends on the problem. If it's one of the things for which Python
>>>> has an obvious solution (sort a list; split a string on whitespace;
>>>> pull select list elements based on a criteria of some kind; search a
>>>> file for lines with a given word in them; etc.) you'd get back the
>>>> same answer from almost all of them.
>>> And what makes you doubt it would be different with Perl? :-D
>> Perl's "There's more than one way to do it" attitude.
> There's doesn't mean that you have to use or know them all. I think 
> every language here and there more ways to do something. And at a 
> broader scope, e.g. a simple algorithm, it doesn't matter that much 
> anymore.

Except that, as I said elsewhere, that having more than one way to do
it bloats the language processor and increases the semantic load on
the programmer. The best the programmer can do, as you imply, is to
ignore the extraneous methods. Then the poor programmer has to puzzle
over them every time they show up in someone else's code.

>>> ( sort @alist, split ' ', $astring, grep criteria, @list, etc )
>> In the one case where perl provides you two ways to do things, you
>> chose the one that doesn't solve the problem. You want map, not grep.
> You think? Please read perldoc -f grep (and map).

I did, and could have sworn that grep modifed the list in place. Mia
culpa.

>> You also chose the wrong way to do things globally, by leaving off the
>> optional parens on the function invocations. That makes the list a
>> PITA to parse,

> First of all, who cares? Not the programmer.

Of course the programmer doesn't care. They jyust have to deal with it
for the rather short development period. The *maintainer* cares,
though - as they have to deal with it for the life of the program.

> But I doubt if you are  correct; why is 
> OP PARAMETER, LIST
> a PITA to parse, and
> OP( PARAMETER, LIST )
> not? I would even say that the former is easier to parse, since there is 
> no need for checking the ( and ) (and matching them).

Look at the *context*. You wrote

word word, word word, word, word word, word, word.

Unless you know what the words mean, this is nearly impossible to
parse out into proper perl expressions. Putting in the parens makes
it:

word(word, word), word(word, word), word(word, word), word.

This is trivial to parse into perl expressions without having to know
the meaning of any of the words.

>> in that you have to know the number of arguments to
>> each function in order to parse the list you provided.
>
> It has been a while since I wrote a lexer, but uhm, you set up a rule?
>
> LIST := ITEM
> LIST := LIST,ITEM

Right. So is

item, item, item, item

one list or two seperated by an English-level comma?

> (I made up the syntax, but I guess it's clear)
>
>> Consider the python version:
>> 
>>          (alist.sort(), astring.split(), [x for x in alist if
>>          criteria(x)])
>
> ( told you it was grep ;-) )
>  
>> This list can be parsed by a machine. Given proper bindings for all
>> the variables, Python will turn it into a tuple.
>
> What makes you think a machine can not parse Perl? I didn't get a Larry 
> Wall with my version of Perl :-D 

What would it take to get Perl to parse the line you typed in?

>> N.B.: split(' ', $astring) is wrong as well. In this case, Perl
>> doesn't provide the right tool for the job; you have to build it from
>> parts.
> You either misread your own problem specifications, or you should read 
> perldoc -f split (near the end, it starts with "As a special case," )

No, I missed the wart hiding under the "special case". How, pray tell,
do you do the equivalent of Python's string.split(' ') in Perl?

>> And those trivial variations are enough that you chose the wrong
>> ones. And you're (by your own admission) an experienced Perl
>> programmer.
> And you don't even come close :-D.

No, one I blew. One you still got wrong.

>>> One could say (and should) that the regular expression thingy in Perl
>>> is a language on its own :-)
>> 
>> It is. For what Perl was designed for, having that be part of the
>> grammar of the language makes sense. For a general-purpose programming
>> language, I'm not so sure.
>
> Same could be said of floating point numbers, or complex numbers, or 
> lists, dictionaries, etc. etc.

Right. And for each of those, there are languages that don't have them
as a built in type.

>>> But you probably agree, that if speed is an issue, and the
>>> programmer's skills are not the issue, that the only thing one can do
>>> is code it in a different language (probably by another programmer).
>> 
>> I don't agree. The better alternative is to look for a faster
>> algorithm.
>
> "The programmer's skills are not the issue"

Good point. I should have skipped the whole thing, as the programmers
skills are *never* not the issue.

> [ skilled Perl programmers use similar or same idioms ]
>
>> My experience with Perl is just the opposite. Everytime I have to
>> maintain Perl code, I come across a different set of idioms - with no
>> obvious downside to them. You can, of course, define "skilled
>> programmers" as those who use your idiom set. This makes the set of
>> skilled Perl programmers very small. That few programmers are skilled
>> is a downside of TMTOWTDI, as the only time I see new idioms in Python
>> are newbies doing very odd things here.
> If I could have a peek at the Perl code you maintained I could tell you 
> (often by just seeing 3-5 lines) the status of the programmer who wrote 
> it :-)

So you'd either say you were wrong, or that my second contention was
right. Either one would be a bad side effect of TMTOWTDI.

> As I wrote before, I have little experience with Python (one could say I 
> only read 2 books on it, and haven't written a stand alone piece of code 
> myself). But I have the feeling that the percentage of badly skilled 
> Perl programmers is way higher compared to Python for two reasons:
>
> Quite some people have been "tweaking" CGI scripts
> Quite some people "know" PHP, and hence consider themselves Perl 
> programmers.

Quite right. Neither is in the set of Perl things I maintain. The
first you can recognize by occasional style oddities in the middle of
the script. The second I'm not sure I'd recognize, as I don't do PHP.

>> part of the grammar of the language, and are a recent addition. It's
>> not clear how Python should evolve with them added to the language.
> More fat: so I would say: learn to live with it. I only see advantages. 
> If you want a minimal set of operations, I recommend programming ARM 
> assembly, and don't go beyond ARM3 :-D.

You could also say more bloat. It's not a good thing. I don't want a
minimal set of operations; I want an orthogonal 1-1 coverage of
operations. That's will account for the least bloat in the processor,
the least load on the programmer, and the least bad code.

>>> You either understand why something is bad at a given moment, or not.
>>> If a language must make up for the understanding a programmer lacks, 
>>> something is very very wrong.
>> 
>> There's a difference between "making up for the understanding a
>> programmer lacks" and "handicapping the programmer". Missing gotos is
>> like missing explicit pointer manipulation.
>
> Neither has ever handicapped me in any way. I remember how Sun claimed 
> that their language was safe from memory leaking. I could come up with a 
> simple example that leaked memory like crazy in a few seconds. Moreover, 
> garbage collection gives newbies the impression that everything is 
> handled automatically, and hence, they forget that other resources are 
> less unforgiven, and *have to be* released.

Other resources are less forgivving only if they are badly
designed. That means they *should* be released, but not *have to be*
released. Consider the file type in Python. It'll be closed after
you're through with it, guaranteed. However, garbage collection isn't
triggered by running out of file descriptors, so you *should* close
them.

>> Carefully designed
>> features added to the language (or restrictions removed from it) can
>> provide the same functionality as those features, without exposing
>> programmers to all the potential bugs that can occur when those
>> features are used.
> A beginner will find a way. A nice example is garbage collection, 
> beginners think they don't have to think. And then suddenly things pop 
> up like: memory leaking, how are circular references handled, and oops, 
> suddenly things like weak references are needed. Add, things like 
> threading, and shared resources, resources that are limited in one way 
> or another and I doubt programming has become easier, or less error 
> prone.

Having dealt with memory leaks in C (and other such languages) for a
decade, I'd say programming is *much* easier than it would be if you
didn't have some form of garbage collection. Sure, programming in the
typical piss-poor threading model you find in popular languages and
etc. may be harder than programming in C without those things, but
it's still easier than programming in C *with* those things.

In fact, as the programming environment becomes more complicated, the
need for eliminating certain classes of errors by proper language
design increases, not decreases.

> Has anyone ever did serious research to the number of bugs per 10k lines 
> for several programming languages?

Yeah. The LISP community did some research on garbage collection
vs. explicit allocate/free a couple of decades ago. The explicit
allocate/free methodology was found to be noticably more bug
prone. Like I said, those date from a couple of decades ago, so I've
lost the reference and google didn't turn anything up.

> I remember to have read that air bags makes people drive more reckless. 
> I am quite convinced the same holds for programming languages. A 
> language can't cover your behind, so to speak.

Could you provide examples of what kind of behavior you're talking
about? What would be the analog of "driving more reckless" given that
I've got a garbage collector?

Of course, if you really believe that all the protections are a waste
of language spec, you should be writing assembler.

>> Adding something that doesn't extend the language and creates
>> potential bugs is a *mistake*. You run that risk every time you add
>> just another way to do something.
> potential bugs is often equal to something people *think* a beginner is 
> going to make.

Yes, but potential bugs even more often turn up in *real*
programs. I've fixed enough bogus pointer/using free'd memory/memory
leaks in C to know that.

>>>> Of course not. The best you can do is provide one obvious way to do
>>>> things, and then hope most people find that.
>>>
>>> Beginners get lost anyway, experienced programmers don't need it
>> 
>> I disagree. If there's not one obvious way to do things, experienced
>> programmers tend to choose the one they are most comfortable with, and
>
> and if they are not hermits, they choose the ones they see the most 
> often used (unless it's Perl golf).

Which means they adopt to their subset of the community. Which means
that supporting code from another community will in practice require
learning a new programming language that happens to have a syntax they
are familiar with.

>> will have to work out what all the others mean. This has been my
>> experience with Perl and Common LISP, and from what I hear is true of
>> C++ as well.
> If I look at which things I have to work out the most: libraries. It 
> sounds a lot like you want an extremely pure language. I almost get the 
> impression that you hand code almost everything yourself. It doesn't 
> matter how clean you make the language, the libraries will be fat. I 
> rarely have to "work out" a piece of Perl. The "there is more than one 
> way to do it" is much more about the combination of basic blocks. Perl 
> is like legos. What you want sounds a lot like legos that can instead of 
> round thingies to connect them uses triangles, so there is only one way 
> to stack them. Oh, and you want them dull grey.

Nope, I make heavy use of libraries. The Python standard library isn't
exemplary, and it some cases provides overlapping functionality. But
it does try to avoid that. It also tries to come with "batteries
included". You can get an aweful lot done in Python without ever going
to third party libraries. With Perl, you wind up going to CPAN for a
lot of things - which puts you back into TMTOWTDI land.

Haven't you heard the story of the professor who had seven identical
suites, one for each day of the week? It saved him the work of having
to decide what to wear each day. If you've ever been married, you may
be familiar with how much work that can involve given a large
wardrobe.

I want programming to be the professors route. I don't want to worry
about which for loop to use - I want there to be just one for loop, so
I take that one and *get on with solving the problem*. Having multiple
for loops (or other TMTOWTDI things) bloats the language
processor/library and increases the load on the programmer to no
benefit.

>> On the other hand, my experience with languages that provide one
>> obvious way to do things (Python, Scheme, Eiffel) is that experienced
>> programmers tend to find that way, and beginners quickly become
>> frustrated when they fight the language.
> I wonder how much this has to do with how you learned Perl, and how you 
> learned Python.

True. The WWW was extant when I learned Python, so I could learn it by
reading the documention on the web site, and looking through the
library. Perl, on the other hand, I had to learn from the
documentation that shipped with it, and the library that shipped with
it. Come to think of it, Python has a larger library than Perl as
well. Given that, one would expect that the variance in idioms would
be larger than Perl, but it ain't.

>>>>>> My Perl evolved from very shell script like (lots of
>>>>>> backticks and passing around the full text of files)
>>>>> I am sure you can do that with Python too.
>>>> That hasn't happened in 9 years of Python.
>>> That was not what I wrote: I am sure one can program that way in
>>> Python too.
>> No, you said "one can do that with Python", leaving the word "that"
>> open to interpretation. I assumed you meant "migrate from writing sh
>> to writing C", which, as I said, hasn't happened.
> But it doesn't mean that one can't do ;-)

I guess if you can write FORTRAN in anything, you can write C or sh in
anythin as well.

>> If you meant writing sh or C in Python, try it.
>
> You talked about "lots of backticks and passing around etc." I am sure 
> one do things that are similar to backticks in Python, and also do the 
> passing around thing.
>
>> You'll find it clumsy and frustrating.
>
> Yes, most languages make it clumsy and frustrating. Perl is a rare 
> exception.

Right - Perl makes writing ugly, slow code easy. Python makes it
hard. I think this makes python the superior language.

>> Python wasn't *designed* to make it comfortable to
>> write that way. Perl was - just a couple of more ways to do things.
> But not clumsy, nor frustrating ;-) Perl is like a nice toolbox, and you 
> want Python to be just one of this tools. Moreover, written on it: 
> guarantee is void if used in any other way then stated in the manual.

Um, Perl isn't like a nice toolbox. Python is like a nice,
well-organized toolbox where everything is easy to find and use (well,
it used to be that way. It's gotten cluttered of late). Perl is like a
cluttered workbench with tools stacked on top of tools, with the
metric and english wrenches dumped in a heap - what ones aren't
scattered elsewhere on the workbench, anyway.

>> My Perl style changed
>> radically over the years. My python style has as well, but only
>> because the language has changed as time passed. In the cases where a
>> new construct/module hasn't been added, the idiom that was obvious
>> with Python 1.4 is still the right choice with Python 2.4. With Perl,
>> there's no obvious right choice,
> To a newbie, nothing is obvious right, and a skilled programmer is able 
> to find the obvious right choice. You make it sound like the perl 
> community leaves people in the dark, and they have to find out what 
> everything means and does by trial and error. As I already wrote: the 
> more than one way is more often the *combination* of well known building 
> blocks.

Now you're trying to change the story. But I know better. Perl
provides multiple ways to do things at the syntactic level, and that's
the root of the problem. There are two iterative loops. There are two
conditional loops. There are two conditional execution statements, not
counting the variants that conditionalize the execution of a single
statement. There are two different syntaxes for invoking builtin
functions (though I don't think one of them works on user-defined
functions; never tried it).

>> A langauge can make it easy to write ugly code, or it can make it hard
>> to write ugly code.
>
> But who writes this code? The language, or the programmer? A programmer 
> who writes ugly Perl code is suddenly going to be a skilled Python 
> programmer? Are you serious?

No, he's not going to be a skilled Python programmer. But you avoiding
ugly code in Python doesn't take a skilled programmer. It's not clear
that even skilled Perl programmers can avoid writing code that some
other community won't find ugly.

>> After all, "You can write FORTRAN in any
>> language(*)". If I have to maintain the code, I'd *much* prefer that
>> the language make it hard to write ugly code, as I'm that much less
>> likely to get ugly code to maintain.
> Nonsense.

I make that claim based on experiene maintaing both Perl and Python
code. What basis do you have for calling it nonsense.

>> TMTOWTDI makes it easy to write
>> ugly code. TOOWTDI makes it hard to write ugly code.
> And the funny thing is: it shouldn't matter to a skilled programmer. And 
> an unskilled programmer will make up for the TOOWTDI restriction in more 
> ways than you and I can imagine.

I don't agree. It doesn't say "There's one obvious to the skilled
programmer way to do it." It says "There's one obvious way to do it."
And it's usually obvious to anyone who's read the tutorials. The
newbie postings on c.l.python back that up - an amazingly small
percentage contain code that does things in the non-obvious way. A lot
of them are trying to do baroque things, usually because they are
trying to write in their last language. They wind up asking on the
list because they get frustrated trying to write something that isn't
Python in Python. If Python allowed all those things to work, they'd
wind up writing ugly code without having a clue that they had done
anything to be ashamed of. It's all to the good.


>>> Also, Perl borrows a lot of its syntax from C, which Python (as far
>>> as I have seen) does extremely little, if at all. So it's already
>>> easier to program C-like in Perl, by design, even if Perl was as
>>> "restrictive" as Python.
>> If Perl only borrowed a lot of it's syntax from C,
> You can not borrow only a lot. Where is the rest coming from?

sh.

>> this wouldn't be a
>> problem. But it borrows a lot of it's syntax from sh as well,
> Yeah, it has to come from somewhere. So either borrow it from some well 
> know "language", or make up a new syntax.  It doesn't matter either way.

But Perl didn't do either one of those. It borrowed from *two*
languages, including overlapping functionality. Then it threw in a
bunch of stuff from other places, possibly fabricated from thin air -
again adding overlapping functionality.

>> sometimes supporting both (because TMTOWTDI). If it had done one or
>> the other, it would have been a better language.
> In your opinion, which sounds quite restrictive.

It's no more restrictive than not having goto or explicit pointers.

> [ new things ]
>> I will agree that adding new idioms from other programming paradigms
>> is a good thing (see <URL:
>> http://en.wikipedia.org/wiki/Programming_paradigm >). In theory, the
>> reason for that is that changing paradigms changes the set of things
>> you do, so you aren't adding more ways to do things, you're adding
>> more things to do.
>> 
>> The reality is that such changes often do introduce new ways to do
>> things that already exist.
>
> Which is no problem at all. The new way is either better, or the old 
> way. One way will be picked up more. As I already stated: the more than 
> one way is more the combination of basic blocks.

Nope. The new things in Python are distinct new things, not just new
combinations of basic blocks. For instance, list comprehensions
replace both map and filter. Those are all three basic blocks.

If the new way isn't better, it shouldn't have been added. It just
adds bloat to the language processor and mental load on the
programmer.

>> There have already been threads where it's
>> been argued (by others - I just read them) that this is detrimental to
>> Python.
> There are always language purists, who prefer a minimal set of 
> statements, 1001 restrictions, and move everything to libraries. Often I 
> have the idea that they don't use libraries at all, but prefer to write 
> their own, pure, language.

Well, I'm certainly not that language purist. I like a minimal set of
statements that do the job, as redundancies just make my job harder. I
hate restrictions - and consider removing restrictions to be an
excellent way to extend the functionality of a language. Compared to
other languages, Python is a joy because of the lack of restrictions:
functions are first-class objects; built-in types can be inheritied
from; user defined classes can be called like functions; in fact, most
of the built-in syntax elements can be made to do something usefull on
user-defined functions. Sure, it's missing some things - like there's
no way to define new operators - but it has fewer restrictions than
most of the languages I've worked with.

          <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From trncyng at yahoo.com  Mon Apr 11 18:47:28 2005
From: trncyng at yahoo.com (trncyng at yahoo.com)
Date: 11 Apr 2005 15:47:28 -0700
Subject: Help! How to use Informix in Python?
Message-ID: <1113259648.318757.112500@o13g2000cwo.googlegroups.com>

Is there a detailed description of how to use Informix from within
CPython in Unix? I could not figure out how to use informixdb, dbi.py
or mxodbc. Up to this point, Python has been a breeze to use, but the
aforementioned methods require what seemingly convoluted beforehand
steps. I can access Informix from Perl, so any help on using Perl's DBI
within Python would be great, but like I said, I couldn't figure out
how to use dbi.py.

Any help appreciated
Thanks in advance to any kind soul willing to help



From whocaresrmb at yahoo.com  Sat Apr 30 16:42:32 2005
From: whocaresrmb at yahoo.com (Johnny Gentile)
Date: 30 Apr 2005 13:42:32 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <1114893545.927914.299170@l41g2000cwc.googlegroups.com>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114893545.927914.299170@l41g2000cwc.googlegroups.com>
Message-ID: <1114893752.109069.285320@o13g2000cwo.googlegroups.com>

>From the Book of Armaments:

"And Saint Attila raised the hand grenade up on high,
saying, 'Oh, Lord, bless this thy hand grenade that with it thou
mayest blow thy enemies to tiny bits, in thy mercy.' And the Lord
did grin, and people did feast upon the lambs, and sloths, and
carp, and anchovies, and orangutans, and breakfast cereals, and
fruit bats..."


 "And the Lord spake, saying, 'First shalt thou take out
the Holy Pin. Then, shalt thou count to three, no more, no less.
Three shalt be the number thou shalt count, and the number of the
counting shalt be three. Four shalt thou not count, nor either
count thou two, excepting that thou then proceed to three. Five is
right out. Once the number three, being the third number, be
reached, then lobbest thou thy Holy Hand Grenade of Antioch towards
thou foe, who being naughty in my sight, shall snuff it.'"



From bokr at oz.net  Sat Apr 30 05:55:14 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 30 Apr 2005 09:55:14 GMT
Subject: Sorting an Edge List
References: <fLqdne0t4Y81OO_fRVn-qw@comcast.com>
	<roy-5F8B9B.18125729042005@reader1.panix.com>
	<3YOdncf7-p0aYO_fRVn-tA@comcast.com>
Message-ID: <42735528.290711591@news.oz.net>

On Fri, 29 Apr 2005 23:37:39 -0400, "Anthony D'Agostino" <gamma-ray at dope.comcast.net> wrote:

>I found my old bubble sort solution:
>
>============================================
>def esort(edges):
>    while 1:
>        swaps = 0
>        for j in range(len(edges)-2):
>            if edges[j][1] != edges[j+1][0]:
>                edges[j+1],edges[j+2] = edges[j+2],edges[j+1] # swap
>                swaps = 1
>        if swaps == 0: break
>    return edges
>
>print esort([('A','Y'), ('J','A'), ('Y','J')])
>print esort([(5,0), (6, -12), (0,6), (-12, 3)])
>============================================
>
>The list can be any length and there will always be multiple valid 
>solutions, depending on which edge you start with. I'm using this to sort 
>edges for mesh subdivision. I just thought there might be a more elegant way 
>to write it. 
>
This is not tested beyond what you see, but it might give some ideas for
what you want to do. I finds separate sequences if you combine the above into
one, e.g.,

----< dagostinoedges.py >-----------------------------------------------------------
# I need to sort this list:
# [('A','Y'), ('J','A'), ('Y','J')] like this:
# [('A','Y'), ('Y','J'), ('J','A')].
# 
# Note how the Ys and Js are together. All I need is for the second element of 
# one tuple to equal the first element of the next tuple. Another valid 
# solution is [('J','A'), ('A','Y'), ('Y','J')].
#
import itertools
def connect(edges):
    nodes = dict([(e[0], e) for e in edges])
    heads = set([e[0] for e in edges])
    tails = set([e[1] for e in edges])
    starts = heads - tails
    out = []
    seen = set()
    for h in itertools.chain(starts, heads):
        curr = nodes[h]
        sub = []
        while curr not in seen:
            sub.append(curr)
            seen.add(curr)
            curr = nodes.get(curr[1])
            if curr is None: break
        if sub: out.append(sub)
    return out

if __name__ == '__main__':
    edges = set([('A','Y'), ('J','A'), ('Y','J'),
                (5,0), (6, -12), (0,6), (-12, 3),
                ('all', 'alone')])
    for sub in connect(edges): print sub
------------------------------------------------------------------------------------
Result:

[ 2:54] C:\pywk\clp>py24 dagostinoedges.py
[('all', 'alone')]
[(5, 0), (0, 6), (6, -12), (-12, 3)]
[('A', 'Y'), ('Y', 'J'), ('J', 'A')]


Regards,
Bengt Richter


From robin at reportlab.com  Wed Apr 13 08:52:53 2005
From: robin at reportlab.com (Robin Becker)
Date: Wed, 13 Apr 2005 13:52:53 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <CX07e.15622$nt3.11926@trndny04>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz>	<mailman.1724.1113261387.1799.python-list@python.org>	<1113264839.497914.210170@z14g2000cwz.googlegroups.com><425b8cf7$0$38043$bed64819@news.gradwell.net>	<mailman.1740.1113297800.1799.python-list@python.org>
	<CX07e.15622$nt3.11926@trndny04>
Message-ID: <425D1625.9030907@chamonix.reportlab.co.uk>

Raymond Hettinger wrote:
> [Robin Becker]
> 
>>People have mentioned the older v6 build scripts/tools still work. Last time I
>>tried they seemed a bit out of date.
> 
> 
> I routinely use the current CVS to build Py2.4 and Py2.5 with MSC6.
> It is effortless and I've had no problems.
> 
> 
> Raymond Hettinger
.... I wonder if it is maintained though.

Last time I tried I think I had to move it one level up to be correct for some 
of the python/my extension locations, but perhaps I misremember.
-- 
Robin Becker



From max at alcyone.com  Fri Apr 29 20:13:30 2005
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 29 Apr 2005 17:13:30 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <mailman.47.1114818531.14961.python-list@python.org>
References: <d4u60o$akh$1@news2.netvision.net.il>
	<mailman.47.1114818531.14961.python-list@python.org>
Message-ID: <19Cdnav2wIQ2UO_fRVn-oA@speakeasy.net>

Shane Hathaway wrote:
> pythonchallenge wrote:
>> For the riddles' lovers among you, you are most invited to take part
>> in the Python Challenge, the first python programming riddle on the net.
>> 
>> You are invited to take part in it at:
>> http://www.pythonchallenge.com
> 
> That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
> "temporary end".

Ironically, I just used Unix tools (tr, grep, sed) for each of the 
puzzles except the first one, and that first one was only because I tend 
to use Python as a convenient calculator anyway :-).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Experience is the name everyone gives to their mistakes.
   -- Oscar Wilde


From gomoSINSPAM at datafull.com  Sun Apr 10 23:39:40 2005
From: gomoSINSPAM at datafull.com (=?iso-8859-1?q?Gonzalo_Sainz-Tr=E1paga_=28GomoX=29?=)
Date: Mon, 11 Apr 2005 00:39:40 -0300
Subject: Dictonary persistance weirdness
References: <pan.2005.04.10.22.07.17.604742@datafull.com>
	<2uij515umrjnma9o0nhbv4arm3katvv6pj@4ax.com>
Message-ID: <pan.2005.04.11.03.39.38.279545@datafull.com>

Hi John,
Thanks for your reply, I was feeling pretty desperate already with no one
talking to me :(

On Mon, 11 Apr 2005 11:46:20 +1000, John Machin wrote:
> Are you sure that is the code that you are executing? What is "x"? What is
> "self.d"? "each" is not used. Even if "x" and "self.d" do exist, the for
> loop will do nothing, and the method will return an empty dictionary.

You are right, I'm sorry, my code has comments and variable names in
Spanish, so i made a translation of it. Obviously i was more stressed out
than i can remember and i came up with that nasty mess. The actual code is:


    def get_vars(self):
        if self.d == {}:
            for x in self.fs.list:
                self.d[x.name] = x.value
        return self.d

> Assuming self.d does exist, why does it exist? I.e for what reason do you
> want the data to persist? Could its persistence be the cause of your
> problem? Are you sure you are not accidentally always referring to the
> same VarsWrapper instance?

self.d is initialized as "{}" on __init__(), and i'm using self.d this way
so that the parsing is done only once, upon get_vars() first call. After
this, self.d will be different than {} and i will just get the values.

Referring to the same VarsWrapper instance (or the same instance of some
other object) sounds like a plausible cause for my problem, since it works
the first time (upon the first instantiation) and keeps the same values
later. The problem is, I really don't see any way this could be happening.
I've checked the corresponding parts of the code a few hundred times rigth
now and I've made sure that every object is new and not reused. This is,
of course, unless there's some unexpected behaviour in mod_python (thing
like variables staying "alive" between executions of a script, or
something like this).

> Is that all that VarsWrapper contains? Seems to me like an unnecessary and
> possibly confusing convolution. If you "own" util.FieldStorage, then
> giving it an as_dictionary() method might be a good idea. Otherwise a
> simple wrapper *function* that replaces your two-step __init__ and
> get_vars would be a not unreasonable idea; there's no law that says that
> everything must be a class.

I guess you are right on this, actually the util.FieldStorage
implementation just replaced an older util.parse_qs() one that provided
with separated get_getvars() and get_postvars() methods, aside from the
get_vars() one. I went back to util.FieldStorage when I found this issue,
in order to reduce the possible origins for this behaviour.

> Are you sure you don't have a dict as a default arg somewhere, like
> in def handle(self, vars={})  ??

I'm positive about this: my code works fine right after a restart of the
server, but keeps seeing the same data after the first request, so the
bug is about unwanted persistence of the first request data, not about
defaults.

Anyway, I will try replacing VarsWrapper with a simple function in order
to avoid yet another possible bug cause.

Thanks again for your help, and if something else comes to your mind I
would really appreciate to hear about it, since i've pretty much ran out
of ideas by now. Anyhow, I will work on it some more tomorrow afternoon,
I'm taking a well deserved break now :D

Gonzalo


From michele.simionato at gmail.com  Mon Apr 25 11:21:14 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 25 Apr 2005 08:21:14 -0700
Subject: ACCU Conference (PyUK) 2005
Message-ID: <1114442474.770008.238600@o13g2000cwo.googlegroups.com>

This should go in a blog, but I do not have one, nor any intention to
start one, so I thought I will post here instead.

Warning: this is a long post!

ACCU Conference (PyUK) 2005: a personal view
=======================================================

Maybe not everybody knows that last week (19-23 of April) we had a
pretty important event in Oxford: the fifth PyUK conference  - hosted
by the ACCU association - which is probably the second most important
Python-related event in Europe after EuroPython.

ACCU means Association of C and C++ Users, so most of the people there
were not Python programmers; still it amazed me how much steam Python
has gathered in the last years between C++ programmers.

Ideally, I was there to give just a short presentation on doctest,
but since Alex Martelli got hired from Google, I had to act as
replacement of the Martelli & Ravenscroft couple, since it not
that easy to find somebody crazy enough to take over or a 6-hours
guru-level Python course. And, of course, there was some Italian
mafia involved ;)

It is not easy to act as a replacement for the martellibot,
especially on short notice, but I tried to do my best. BTW,
interested people can find my notes somehere on the ACCU website
https://www.accu.org/conference/ or on my site
http://www.phyast.pitt.edu/~micheles/python/oxford-lectures.zip

I was actually worried a bit about people deserting the lectures once
they discovered that Alex & Anna where not coming; it turns out my
worries were injustified. We actually had something like 20 persons
there, so we filled the room pretty well.

The interesting thing was that at least half the people were
experienced C++ programmers willing to learn Python, and not actual
Python programmers. So, I had to correct the scope of the lectures
in real time and I could not cover metaclasses, whereas I covered
decorators but not as well as they deserve. Next year the tutorial will

probably have a title such as "Python for C++ programmers" and the
program
will be changed accordingly. Anyway, people were extremely interested
and the session (originally scheduled to end at 4 PM) actually
went go until after 6 PM!

It turned out that one of my "students" was Stephen Turner from
Microsoft:
Steve's title is "Developer evangelist" and it is part of his job to
present to the developers the new cool projects Microsoft is working
on:
in this particular case, he went to the course since he in charge
of evangelizing Jim Hugunin's brainchild, IronPython, i.e. Python
running (fast!) on Dot Net, and he wanted to have a good picture
of CPython capabilities.

Obviously when I discovered that, I immediately asked him if he was
willing to give a presentation on IronPython. We were lucky, since he
accepted, he got some slides from Jim Hugunin's PyCON presentation
and he gaves us a truly wonderful demonstration of IronPython
capabilities. *Really* impressive.

One cannot overrate the importance of this development for the future
of Python. I asked Steve if Microsoft plans to support IronPython as
part of the DotNet choice of languages: the answer was that there is no
intention to sell IronPython. IronPython is an OpenSource project based
on DotNet but it is not part of the DotNet offer and there are no
plans in this sense.

Some of you may be surprised (I certainly was) but Microsoft has been
financing various Open Source projects in the last few years, released
under BSD-style licences. IronPython is just one of these projects.
There will probably be more. So stay tuned and keep an eye on what
Redmont
is doing. What it clear is that now Microsoft knows about the existence
of
Python and it is actually investing money on it.

This is quite a change, especially with respect to what our keynote
speaker, Greg Stein, told us about his experience with Microsoft
7-8 years ago, when he was employed by them: at that time Microsoft's
reaction to Python was something along the line of "Python what? is
that a programming language?".

Greg also told has about the programming language policy at Google
(his current) employer: Googles uses and acknowledges officially only
three mainstream languages: C++, Java, and Python. Python *is*
mainstream
for them. And judging from the space accorded to Python at the ACCU
conference,
Python is mainstream for the ACCU members too.

An extremely impressive accomplishement for Python, if you think about
it. And if Microsoft and Google are not enough, know that Nokia
is offering Python on their mobile phones. Tapio Tallgren gaves us an
extremely interesting technical talk on how you can program the
Series 90 mobile using Python. They are targetting Python 2.2
and most of the standard library just works, the speed is pretty
good and actually they were surprised of how easy was to make the
port.

All in all, pretty good news, people! It seems a pretty good moment
to be a Python programmer!

I have something else to say, but I will make another post for that.

        Michele Simionato



From mylastnameruntogether at mycompanyname.com  Mon Apr 11 01:14:47 2005
From: mylastnameruntogether at mycompanyname.com (Brandon J. Van Every)
Date: Mon, 11 Apr 2005 05:14:47 GMT
Subject: web authoring tools
Message-ID: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>

As is easily noticed, my website sucks.  Enough people keep ragging
on me about it, that maybe I'll up and do something about it.  However,
I currently have FrontPage 2000 and I hate it.  Ideally, I would like an
open source website + html design tool implemented in Python, so
that possibly someday I can fix whatever's broken about it.  That said,
I would like a tool that actually saves me work as a web designer.  I
don't feel that FrontPage 2000 does this.  I'm saying there's a certain
level of maturity that has to exist in the app, it can't be some "alpha
quality" thing.  If you know of such a beast in Python, please
let me know.

Here are some examples of reasonable website designs for my purposes as
a game developer or consultant: 

http://www.igda.org/seattle/
http://www.cyphondesign.com/
http://www.alphageeksinc.com/
http://www.gamasutra.com

The first 3 sites "breathe well," they aren't cluttered.  Gamasutra is a
little cluttered, but has good aesthetics.  Also when I write articles
for other people's consumption, this is the standard I'd measure them
by. 

I'm not sure if I want a blogging capability, or something more like
Gamasutra.  That's a quality vs. quantity issue.  I don't know if I want
a web forum.  I generally don't like web forums and I've tended to let
Yahoo! Groups do the mailing list job.

I believe my webhost can take either Unix or Windows stuff.  My local
machine where I do all development is Windows.  I'd be interested to
know about Linux solutions too though.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

"The pioneer is the one with the arrows in his back."
                          - anonymous entrepreneur


From draghuram at gmail.com  Tue Apr 26 10:29:01 2005
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 26 Apr 2005 07:29:01 -0700
Subject: How to start python interactively from python script?
Message-ID: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>

Hi,

I would like to have a python script which does some computations at
the beginning and then changes to interactive mode (by displaying the
prompt). How can I do this?

Thanks in advance,
Raghu.



From mauriceling at acm.org  Tue Apr 26 04:16:17 2005
From: mauriceling at acm.org (Maurice LING)
Date: Tue, 26 Apr 2005 18:16:17 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
Message-ID: <d4ktck$r9a$1@domitilla.aioe.org>


> All you have to do is convince the developers to declare the set of
> bytecodes fixed, and they'd be stable. I don't think that will be
> easy, as it removes one of the methods used to improve the performance
> of Python. Since rebuilding the bytecode files is trivial (just invoke
> compileall.py in the library as a script), this isn't really a
> problem. The only thing that breaks are modules that muck about inside
> the bytecode. I don't know how much bytecode improvements have sped
> things up, but I do know that if I ever used a module that mucked
> around with byte codes, I wasn't aware of it - so this is a tradeoff
> I'm more than happy to make.
> 

Thanks Mike,

My arguments to the developers will be:

1. Python had gone from a purely scripting language to a general purpose 
programming language.

2. The current compilation scheme (compiling to bytecode as and when it 
is needed) works well for scripting purposes but is less desirable in 
commercial settings. Less distribution happens when it is used purely 
for scripting purposes, such as system maintenance or tuning.

3. Using Python in commercial settings will usually require distribution 
of resulting software and it is may or may not be desirable to 
distribute source codes as well. Unless the application is frozen, 
distributing source code is a must.

4. One advantage that Java platform has is that it does not require the 
release of source files and still promotes platform-independence.

5. Unstable bytecodes makes updating to a newer version of Python very 
tedious and risk breaking old scripts, if they uses C modules.

6. Unstable bytecodes also makes research work into Python, such as, 
just-in-time compilation and just-in-time specialization unfavourable as 
they may only be applicable to a specific version of Python. There is 
much less chance of getting a project grant than if the same project is 
applied for Java (stable bytecodes).

What other point are there?

I may be chopped by saying this but by having a stable set of bytecodes, 
we may lose a means of optimization. But we may gain more from filling 
the need for commerical distribution of applications writing in Python 
and ease of upgrading...

At current stage, every time a new version of Python is installed in my 
server or system, I have to test and ensure the needed libraries are 
there... which may be a horror in corporate settings. Couple that with 
messy dependencies of the libraries to be installed. I remembered the 
time I was trying to install Eric 3, the dependencies makes me want to 
give up... I have to install Qt, then pyQt, then something else, then 
Eric3. Imagine you need 10 of those libraries... which may happen... I 
am not yet masochistic enough to take pleasures in this...

I also hope some python developers are reading this thread as well...... 
  Call this a desperate plea from some of us......

Cheers
Maurice


From tjreedy at udel.edu  Wed Apr 27 12:18:50 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 27 Apr 2005 12:18:50 -0400
Subject: suggestions on how to do this
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
Message-ID: <d4odn3$6r4$1@sea.gmane.org>


"chris" <cf_1957 at hotmail.com> wrote in message 
news:xNKbe.30981$5F3.1340 at news-server.bigpond.net.au...
> I have a recursive function b(k)
>
> b(k) = -(A/k**2)*(b(k-2) - b(k-5))

This is specifically called a recurrence relation/

[snip]
> When this is expanded I get a polynomial F(A). I want to determine the
> coefficients of the polynomial so that I can find the roots of the 
> function
> F up to a specified order of A.

This is a math/numerical analysis problem.  If you don't get an answer 
here, I'd look for a text of recurrence relations and polynomials, and look 
for a math/numerical analysis newsgroup.  sci.mathematics?

Note: your subject line is so vague that a specialist who can tell you more 
could but only selectively opens threads could easily miss this.  It is 
only happenstance that I didn't.

Terry J. Reedy





From mahs at telcopartners.com  Wed Apr 20 14:19:16 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 20 Apr 2005 11:19:16 -0700
Subject: Array of Chars to String
In-Reply-To: <d44uiv$it1$04$1@news.t-online.com>
References: <mailman.2133.1113942800.1799.python-list@python.org>	<42658990.7739398@news.oz.net>	<mailman.2139.1113953291.1799.python-list@python.org>
	<d44uiv$it1$04$1@news.t-online.com>
Message-ID: <d4666n$lqb$1@sea.gmane.org>

Peter Otten wrote:
> Michael Spencer wrote:
> 
> 
>>>>> def func_join(s, letters):
>>
>>...     return "".join(letter for letter in s if letter in set(letters))
> 
> 
> Make that
> 
> def func_join(s, letters):
>     letter_set = set(letters) 
>     return "".join(letter for letter in s if letter in letter_set)
> 
> for a fair timing of a set lookup as opposed to set creation.
> 
> Peter
> 
Sorry - yes!  I trip up over the early-binding of the outer loop, but the 
late-binding of the condition

Anyway, here are the revised timings, which confirm the speed-advantage of the 
translate approach.  And, as before, with such a short list of white-listed 
letters, it does not pay to create a set at all, even outside the loop.  Note 
the speed advantage of func_translate1 is 50:1 for long strings, so as Bengt 
pointed out, it's worth keeping this in mind for character-based filtering/joining.

  >>> def func_join1(s, letters):
  ...     return "".join(letter for letter in s if letter in letters)
  ...
  >>> def func_join2(s, letters):
  ...     letter_set = set(letters)
  ...     return "".join(letter for letter in s if letter in letter_set)
  ...
  >>> def func_translate1(s, letters, table=string.maketrans("","")):
  ...     return s.translate(table, table.translate(table, letters))
  ...

  >>> for multiplier in (1, 10, 100, 1000, 10000):
  ...     print "List multiplier: %s" % multiplier
  ...     print shell.timefunc(func_translate1, "Bob Carol Ted Alice" * 
multiplier, 'adB')
  ...     print shell.timefunc(func_join1, "Bob Carol Ted Alice" * multiplier, 
'adB')
  ...     print shell.timefunc(func_join2, "Bob Carol Ted Alice" * multiplier, 
'adB')
  ...
  List multiplier: 1
  func_translate1(...)  62295 iterations, 8.03usec per call
  func_join1(...)  36510 iterations, 13.69usec per call
  func_join2(...)  30139 iterations, 16.59usec per call
  List multiplier: 10
  func_translate1(...)  53145 iterations, 9.41usec per call
  func_join1(...)  7821 iterations, 63.93usec per call
  func_join2(...)  7031 iterations, 71.12usec per call
  List multiplier: 100
  func_translate1(...)  23170 iterations, 21.58usec per call
  func_join1(...)  858 iterations, 0.58msec per call
  func_join2(...)  777 iterations, 0.64msec per call
  List multiplier: 1000
  func_translate1(...)  3761 iterations, 132.96usec per call
  func_join1(...)  87 iterations, 5.76msec per call
  func_join2(...)  81 iterations, 6.18msec per call
  List multiplier: 10000
  func_translate1(...)  407 iterations, 1.23msec per call
  func_join1(...)  9 iterations, 56.27msec per call
  func_join2(...)  8 iterations, 64.76msec per call
  >>>





From ckwiguno at gmail.com  Tue Apr 19 20:12:12 2005
From: ckwiguno at gmail.com (Clara)
Date: 19 Apr 2005 17:12:12 -0700
Subject: Entry Value won't get updated...Help please
Message-ID: <ea0a4a1a.0504191612.b64e20@posting.google.com>

I tried to print the value of my entry widget by passing the
result of controlvariable.get() in Tkinter to a function.
However, I kept printing empty string (eventhough I've
written something inside the  entry widget). But if I first
set the value of the entry widget using .set,...I can get
the value just fine...Anybody knows why??


From mensanator at aol.com  Fri Apr 22 16:16:05 2005
From: mensanator at aol.com (mensanator at aol.com)
Date: 22 Apr 2005 13:16:05 -0700
Subject: Python licence again
In-Reply-To: <mailman.2306.1114199590.1799.python-list@python.org>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
Message-ID: <1114200965.274551.291260@o13g2000cwo.googlegroups.com>


Laszlo Zsolt Nagy wrote:
> fuzzylollipop wrote:
>
> >try spelling license correctly next time and heading the google
> >suggestions that probably looked like "didn't you mean : Python
License"

Google knows that "licence" is an alternate (as opposed to mispelled)
version of "license" and returns matches with either spelling, so it
does not give you the "didn't you mean" prompt.

> >
> >
> Oh yes, that was the problem. I'm not aware of that. Unfortunately,
I'm
> not an American. I'm Hungarian
> and my dictionary said 'licence' is correct. But I looked at
'license'.
> It means almost the same. :-)
>
> Is it something like 'center' or 'color' for Americans and 'centre'
or
> 'colour' for British people?
> (Sorry to be offtopic)

Could be, I noticed one of the returned matches where "licence" was
used
had a .uk domain.

>
>   Laci 2.0
>
>
>
> --
> _________________________________________________________________
>   Laszlo Nagy		      web: http://designasign.biz
>   IT Consultant		      mail: gandalf at geochemsource.com
> 
>      		Python forever!



From david.murmann at rwth-aachen.de  Fri Apr 29 21:33:46 2005
From: david.murmann at rwth-aachen.de (David Murmann)
Date: Sat, 30 Apr 2005 03:33:46 +0200
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <mailman.47.1114818531.14961.python-list@python.org>
References: <d4u60o$akh$1@news2.netvision.net.il>
	<mailman.47.1114818531.14961.python-list@python.org>
Message-ID: <3dg5isF6qe1nhU1@news.dfncis.de>

Shane Hathaway wrote:
> That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
> "temporary end".
> 
> Shane
> 
> P.S. I hope I didn't hammer your server on step 3.  I was missing the
> mark. :-)

Interestingly step 3 is actually wrong... there is an additional 
solution, which looks like cqqmsxk. (I don't think that spoils the fun :))


From radam2 at tampabay.rr.com  Fri Apr  1 14:56:55 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Fri, 01 Apr 2005 19:56:55 GMT
Subject: Decorater inside a function? Is there a way?
References: <d44r41heonvenjoeu0dtddpv7lm585vi4p@4ax.com>
	<pan.2005.04.01.18.47.05.964216@jerf.org>
Message-ID: <it7r41dco1e2mejfl1ibgjh6ses3d04baa@4ax.com>

On Fri, 01 Apr 2005 13:47:06 -0500, Jeremy Bowers <jerf at jerf.org>
wrote:

>On Fri, 01 Apr 2005 18:30:56 +0000, Ron_Adam wrote:
>> I'm trying to figure out how to test function arguments by adding a
>> decorator.
>
>The rest of your message then goes on to vividly demonstrate why
>decorators make for a poor test technique.

So it's not possible to do.  Ok, thanks.

>Is this an April Fools gag? If so, it's not a very good one as it's quite
>in line with the sort of question I've seen many times before. "I have
>a hammer, how do I use it to inflate my tire?"

Not an April fools gag, I'm just new to decorators and google brings
up lots of discussions from the past on how they may be implemented in
the future, but not much in actually how they work or how to use them.
They don't seem to be documented well at the present, possibly because
the syntax and or function of them isn't completely decided on.  I've
been able to figure out the basic principle from the examples I've
found, but that doesn't mean there isn't more possibilities I haven't
found yet.

>Assuming you're serious, why not use one of the many testing technologies
>actually designed for it, and tap into the associated body of knowledge on
>how to accomplish various tasks? Start with what you're trying to do, then
>work on how to do it. 

I'm trying to understand the use's, limits, and possibilities of
decorators.

It just occurred to me that wrapping the contents of a function vs
wrapping the function it's self, could be useful.  

Ron



From deetsNOSPAM at web.de  Thu Apr  7 09:15:39 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 07 Apr 2005 15:15:39 +0200
Subject: Python backend binding to PAM, NSS or pppd
References: <mailman.1466.1112849070.1799.python-list@python.org>
	<d33bnt$d48$04$1@news.t-online.com>
Message-ID: <d33bpr$d48$04$2@news.t-online.com>

> I've been using pyton-pam before. Works as expected - but pam frustrated
> me a bit, and you gotta run as root for it to work - a thing I didn't want
> to do.

Ok, I just found that you wanted to play from the other side of the fence -
never mind my answer. 
-- 
Regards,

Diez B. Roggisch


From learned at gmail.com  Mon Apr 18 17:37:58 2005
From: learned at gmail.com (Denrael)
Date: 18 Apr 2005 14:37:58 -0700
Subject: Updating Windows File Summary Data
Message-ID: <1113860278.876481.210270@z14g2000cwz.googlegroups.com>

I am looking for a way in Python to update Windows File Summary
Metadata. By that I mean the data (Title, Subject, Keywords, Comments)
found when you right click a windows file, select properties and then
summary. Can anyone point me in the right direction?



From phillip.watts at anvilcom.com  Sat Apr 30 21:26:53 2005
From: phillip.watts at anvilcom.com (phil)
Date: Sat, 30 Apr 2005 20:26:53 -0500
Subject: Tkinter weirdness item count
Message-ID: <4274305D.4070401@anvilcom.com>

 >> Using Tkinter Canvas to teach High School Geometry
 >> with A LOT of success.

 >Can you post a link to your code.
 >I'd like to see what you are doing.

 >Thx,
 >Alan Isaac

Yes, I will release it open source at the end of may.
There are too many features I want to add to release it now.

Essentially it is a script language for making complex drawings,
rotating objects, plotting simple functions, and with
a dialogue.  Which means you can make a simple concept or
a whole chapter into a lesson.

Eventually I will write a whole course based on Cliff notes
geometry review.

Why, are you a teacher?





From sjmachin at lexicon.net  Thu Apr 21 19:38:48 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 22 Apr 2005 09:38:48 +1000
Subject: Strings
References: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
Message-ID: <2hcg619njrngvqig9i14k727qnjpe36vgr@4ax.com>

On Thu, 21 Apr 2005 21:16:43 +0800, Dan
<dan at dontspammecauseidontlikit.com> wrote:

>I've having trouble coming to grip with Python strings.
>
>I need to send binary data over a socket.  I'm taking the data from a
>database.  When I extract it, non-printable characters come out as a
>backslash followed by a three numeric characters representing the
>numeric value of the data.  

It would be very strange, but not beyond belief, for a DBMS to be
storing strings like that. What you are seeing is more likely an
artifact of how you are extracting it.  If this is so, it would be
better to avoid the complication and error-proneness of converting to
an octal[yuk!]-based representation and back again.

However if the DBMS *IS* storing strings like that, then it would
require a look in the DBMS docs PLUS a look at the empirical evidence
to produce a reliable transcoding.

If you were to tell us which DBMS, and supply a copy&paste snippet
(*NOT* a re-typing) of the *actual* extraction code that you are
using, then we should be able to help you further.

Cheers,

John




From exogen at gmail.com  Thu Apr 28 05:36:26 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 28 Apr 2005 05:36:26 -0400
Subject: Which IDE is recommended?
In-Reply-To: <d4qamk$59u$1@eeyore.INS.cwru.edu>
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
Message-ID: <d4qaqn$59u$2@eeyore.INS.cwru.edu>

Oh yeah, and what's with not being able to configure the code completion
key sequence. How about *no* key sequence? That's the way every other
IDE I've used does it. This is more like semi-automatic code completion.

--
Brian Beck
Adventurer of the First Order


From kent37 at tds.net  Thu Apr 21 11:29:15 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 21 Apr 2005 11:29:15 -0400
Subject: A smallish Tkinter question
In-Reply-To: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
References: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
Message-ID: <4267c284$1_3@newspeer2.tds.net>

mediocre_person at hotmail.com wrote:
> """
> What I want: A little window to open with a 0 in it. Every second, the
> 0 should increment by 1.
> What I get: A one second delay, see the window with a 1 in it, and then
> nothing appears to happen. Never see the 0, never see a 2.  Any quick
> clues? Thanks. Nick. (Python 2.4, Win98).

Your run() method doesn't loop, so it only updates once. But there is a fundamental problem; the 
run() method is called before you even start Tkinter by calling mainloop(). That's why you never see 
the 0. If you change run to loop forever, it won't return and you will never even get to the 
mainloop() call.

Tkinter supports timed, asynchronous callbacks. Here is a program that uses a callback to display a 
ticker:
from Tkinter import *

count = 0

def update():
     ''' Callback method updates the label '''
     global count
     count += 1
     label.configure(text=str(count))

     # Schedule another callback
     root.after(1000, update)


root=Tk()
label=Label(root,text="0")
label.pack()

b=Button(root,text="Bye",command='exit')
b.pack()

# Schedule the initial callback
root.after(1000, update)

root.mainloop()


Kent
> """
> 
> from Tkinter import *
> from time import sleep
> 
> class Clock:
>     def __init__(self, parent):
>         self.time = 0
>         self.display = Label(parent)
>         self.display["font"] = "Arial 16"
>         self.display["text"] = str(self.time)
>         self.display.pack()
> 
>     def run(self): #also tried self,parent
>         sleep(1.0)
>         self.time = self.time + 1
>         self.display["text"] = str(self.time)
> 
> win = Tk()
> app = Clock(win)
> app.run() #also tried run(win) with self,parent above
> win.mainloop()
> 


From gnb at itga.com.au  Thu Apr 21 03:55:24 2005
From: gnb at itga.com.au (Gregory Bond)
Date: Thu, 21 Apr 2005 17:55:24 +1000
Subject: Can an object of a C type have random members added? tp_dictoffset?
Message-ID: <c9m74d.fv9.ln@lightning.itga.com.au>

One of the cool things about Python is the ability to "decorate" objects 
with random extra members:
	class C:
		def __init__(self):
			self.foo = 0
	c = C()
	c.bar = 1

I have a class implemented in C using tp_members to specify (read-only) 
access to data members in the C struct. I'd like to be able to do the 
decoration trick with objects of this class.  Is this possible?

[The documentation for tp_dictoffset eseems to hint that this is 
possible..... how do I use it?]


From mauriceling at acm.org  Tue Apr 26 07:18:21 2005
From: mauriceling at acm.org (Maurice LING)
Date: Tue, 26 Apr 2005 21:18:21 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org> <86is29n9cg.fsf@guru.mired.org>
Message-ID: <d4l825$mj7$1@domitilla.aioe.org>

> 
>>2. The current compilation scheme (compiling to bytecode as and when
>>it is needed) works well for scripting purposes but is less desirable
>>in commercial settings. Less distribution happens when it is used
>>purely for scripting purposes, such as system maintenance or tuning.
> 
> 
> The solution with the current situation depends on what you mean by
> "commercial settings".
> 

Commerically, I will mean distributing the program without the codes. 
The best way under the current method is to freeze the application. In 
Java, you can just distribute the JAR files or CLASS files. I can 
imagine there will be some level of touchiness when source codes are 
distributed...

> 
>>3. Using Python in commercial settings will usually require
>>distribution of resulting software and it is may or may not be
>>desirable to distribute source codes as well. Unless the application
>>is frozen, distributing source code is a must.
> 
> 
> People have recommended that you distribute the Python interpreter
> with commercial applications. This makes installing them much easier
> for the end user. It also means the byte code and the interpreter will
> always match.
> 
> 
>>4. One advantage that Java platform has is that it does not require
>>the release of source files and still promotes platform-independence.
> 
> 
> Java is only "platform-independent" to the degree that the jvm and
> libraries you need for your application are already available.  A
> quick google finds applications that require jvm versions - so I
> suspect that you can't always run Java code built for a new version of
> the jvm on older jvms. So you have to make sure the target platform
> has a recent enough implementation of the jvm installed. You may have
> problems if you try using a different groups jvm as well. I haven't
> looked into that in a number of years.
> 
> So you can't just ship java bytecodes to someone expecting they'll be
> able to run it out of the box. They may well need to update their java
> environment, or install a second one (I recall one time having four
> Java products that took in total three different jvms to run. Bleah.)
> 
> This isn't really different from Python. In both cases, the end user
> has to have a suitable version of the bytecode interpreter and
> libraries installed. Java is a little better in that they provide
> backwards compatability.
> 

I think backward compatibility is good enough. A Java JAR file compiled 
under for JVM 1.2 can still run in JVM 1.4. I don't think anyone will or 
can expect forward compatibility, that will require godly powers...

According to Steve Holden's reply, Python C API is only backward 
compatible in minor versions but not major versions. The issue is, why 
not major versions as well unless there's something exceedingly prohibitive?

> 
>>5. Unstable bytecodes makes updating to a newer version of Python very
>>tedious and risk breaking old scripts, if they uses C modules.
> 
> 
> Unstable bytecodes have nothing to do with these problems. 
> 
> The current CPython installation process puts the python command and
> the libraries for different versions in different directories. This
> allows you to have multiple versions installed so you can keep old
> scripts working with the old version until you've had time to test
> them. It also makes life much easier on the developers, as they can
> have a development version installed on the machine at the same time
> as they have a production version without breaking the old scripts. It
> also means you have to reinstall all your modules on the new
> installation - which is what makes the update process tedious for me.
> 
> Now, this could be mitigated by having Python libraries installed in
> the same location for all versions. You could fix all the bytecode
> files by running compileall.py as a script. Sometimes, a module won't
> work properly on a new version of Python, and will have to be
> updated. You'll have to find those by trial and error and fix them as
> you find them. You'll also have to recompile all the C modules, which
> will break running scripts on the old interpreter.
> 
> Under the currewnt system, old scripts that are run by the new
> interpreter will break if all the modules they need aren't installed
> yet. Once they're installed, the scripts should work.
> 
> If you have scripts that use C modules that aren't installed in the
> standard Python search path, they may well break on the new
> interpreter until you recompile them. Having both versions of the
> interpreter available makes this tolerable.
> 
> The cure I proposed seems worse than disease. If you've got a better
> solution, I'm sure we'd be interested in hearing it.
> 

Perhaps this is another call for Python version of CPAN (CPyAN or PYAN). 
  It can be modelled after Fink or Darwinports.

If I remembered correctly, Fink uses apt-get and curl.

What can be done in PYAN is to encourage all 3rd party library 
developers to centralize their libraries in it, which I think all will 
gladly respond. All that is needed to be  deposited in PYAN is a 
description file, like the simplest setup.py file. All that is needed in 
this description file is
1. where to download the source codes (e.g. CVS)?
2. version number?
3. standard stuffs (optional) like authors, descriptions, copyright?

Python can then have a built-in mechanism to read the description file 
and download the source codes and do the standard "sudo python setup.py 
install" to install the library into site-package. The main thing this 
mechamisn does is to maintain what had been installed in site-package 
through it and what versions. So when newer versions of Python is 
installed, there can be a script to take the old site-package log, 
download the same set of libraries and install them for the new version 
of Python.

Darwinports uses a very simple means to achieve this. All the 
description files are in a CVS repository. The actual source codes for 
the libraries may or may not reside in the CVS repository. Darwinports 
system installation is little more than checking out the entire 
repository of description files. When user wants to install a library, 
it then downloads the library's source codes and performs the standard 
"configure, make, make install" operations. Of course, the root user 
will have to do a update to update to the latest version of description 
files.

I think something like this can be set up for Python quite easily. I 
recall some time back, there's a long discussion about setting up 
Python's version of CPAN but I can't recall the contents of the 
discussions.

> 
> Fixing the byte-code problem won't help with the dependency
> problem. If anything, it'll make it worse, because you'll have old
> libraries that were installed with previous versions of Python to
> contend with. If those are acceptable, that's all well and good. But
> for complex packages like eric - which depends on sip and qt and a
> number of other things - the latest versions tend to rely on having
> up-to-date libraries. So you install eric, and watch it fail because
> some library is out of date. Update that library and repeat. The
> easiest way to deal with this is to find all the libraries it needs,
> and just update them all.
> 
> The dependencies problem is actually pretty easy to solve. In fact, in
> many Python environments, it's already solved. On my system, if I
> install Eric3 using the provided installation package, the
> dependencies will be picked up automatically. Not very helpfull if
> you're not on such a system, I know. The long-term solution is for
> PyPI to grow to include this functionality.
> 

I must say that I do not quite understand your system. Please enlighten me.

Thanks and cheers
Maurice


From fredrik at pythonware.com  Sun Apr 24 03:07:51 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 09:07:51 +0200
Subject: Unicode problems, yet again
References: <d4eruk$gns$1@bagan.srce.hr>
Message-ID: <d4fgae$q7r$1@sea.gmane.org>

Ivan Voras wrote:

> I have a string fetched from database, in iso8859-2, with 8bit
> characters, and I'm trying to send it over the network, via a socket:
>
>    File "E:\Python24\lib\socket.py", line 249, in write
>      data = str(data) # XXX Should really reject non-string non-buffers
> UnicodeEncodeError: 'ascii' codec can't encode character u'\u0161' in
> position 123: ordinal not in range(128)
>
> The other end knows it should expect this encoding, so how to send it?
>
> (Does anyone else feel that python's unicode handling is, well...
> suboptimal at least?)

you mean it should be able to automagically infer that you want your
Unicode strings to be shipped in ISO-8859-2 when you write them
to a socket?  wouldn't that annoy everyone using more common en-
codings, such as ISO-8859-1, UTF-8, and EUC-JP?

(the only "suboptimal" thing with Python's Unicode system is that it
forces you to learn that text is not just a bunch of bytes.  for some
reason, some programmers find that being extremely hard -- and
for some reason, the same programmers usually have no problems
understanding that python integers, floats, and other objects are not
just a bunch of bytes.  go figure...)

</F>





From garz at tmft.net  Fri Apr 22 10:37:11 2005
From: garz at tmft.net (Markus Wintermann)
Date: 22 Apr 2005 07:37:11 -0700
Subject: c-extension crashes unexpected
Message-ID: <f791a214.0504220637.63492afd@posting.google.com>

hello,

i try to write an extension which calls an api.
however,
i haven?t written very much till now, 
but i`ve already managed to make a mistake.

because when i try to call my function,
python 2.4 dies with an errorwindow.

i believe that has something todo with reference counts and memory
allocation but i can?t find my mistake.

here?s the code:

/* Wrapper-Funktion f?r apiJob() */
static PyObject* wrap_apiJob(PyObject* self, PyObject* args) {

	char* ecu = (char *) PyMem_Malloc(APIMAXNAME);
	char* job = (char *) PyMem_Malloc(APIMAXNAME);
	char* para = (char *) PyMem_Malloc(APIMAXPARA);
	PyObject *resultlist;
	unsigned short i,j,setcount,resultcount;

	if (!PyArg_ParseTuple(args, "ss|s", &ecu, &job, &para))  { return 0;}

	if (!apiInit()) return Py_BuildValue("s", apiErrorText());

	apiJob(ecu, job, para, "");

	while (apiState()==APIBUSY);

	if (apiState()==APIERROR) {
		return Py_BuildValue("s", apiErrorText());
	}

	if (!apiResultSets(&setcount)) return Py_BuildValue("s",
apiErrorText());

	for (i=0;i<setcount+1;i++) {
		PyList_SetItem(resultlist, i, Py_BuildValue("i",i));

	}

	resultlist =  PyList_New(setcount+1);


	PyMem_Free(ecu);
	PyMem_Free(job);
	PyMem_Free(para);

	return Py_BuildValue("N",resultlist);
}

-----------
there is nothing wrong with the apicalls.
when i comment them out it dies too.


From harlinseritt at yahoo.com  Sun Apr 24 20:17:44 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Apr 2005 17:17:44 -0700
Subject: Decent Win32All Documentation
In-Reply-To: <IENae.25$Ne7.6@newssvr17.news.prodigy.com>
References: <1114334447.365988.197870@o13g2000cwo.googlegroups.com>
	<IENae.25$Ne7.6@newssvr17.news.prodigy.com>
Message-ID: <1114388264.585122.290660@z14g2000cwz.googlegroups.com>

Kartic,

Thanks for the help. It's good to get a different perspective on
something (i.e. MSDN, dir() etc).



From claird at lairds.us  Wed Apr 27 19:09:36 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 27 Apr 2005 23:09:36 GMT
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu> <d4m9hl$8br$1@solaris.cc.vt.edu>
	<diu2k2-6l3.ln1@lairds.us> <d4mme5$2ej$1@solaris.cc.vt.edu>
Message-ID: <hig5k2-sp.ln1@lairds.us>

In article <d4mme5$2ej$1 at solaris.cc.vt.edu>,
rbt  <rbt at athop1.ath.vt.edu> wrote:
>Cameron Laird wrote:
>> In article <d4m9hl$8br$1 at solaris.cc.vt.edu>,
>> rbt  <rbt at athop1.ath.vt.edu> wrote:
>> 			.
>> 			.
>> 			.
>> 
>>>Read and search them for strings. If I could do that on windows, linux 
>>>and mac with the *same* bit of Python code, I'd be very happy ;)
>> 
>> 
>> Textual content, right?  Without regard to font funniness, or
>> whether the string is in or out of a table, and so on?
>
>That's right. More specifically, I've written a script that uses a RE to search 
>through documents for social security numbers. You can see it here:
>
>http://filebox.vt.edu/users/rtilley/public/find_ssns/find_ssns.html
>
>This works on Word, Excel, html, rtf or any ANSI based text. I need the
>ability to 
>read and make sense of PDF files as well so I can apply the RE to their
>content. It's 
>been frustrating to say the least. Nothing at all against Python...
>mostly just sick 
>of hearing about the 'Portable' document format that isn't string or RE
>searchable... 
>at least not easily anyway.
			.
			.
			.
PDF is NOT easy to search.  'Fact, many times it's not even feasible,
in any automated sense.  

When I can make time, I want to look into your Word and Excel searching;
there are several tricks for doing these in full generality.

Unless I've missed late-breaking news, Perl does NOT help, despite the
flashy appearance of the CPAN search page you referenced.  None of that
stuff gets at content in a sense that'll serve you well.

Neither does anything open-sourced in Python.  The best I know is what
I'm slowly documenting at <URL:
http://phaseit.net/claird/comp.text.pdf/PDF_converters.html#pdf2txt >,
as David mentioned earlier.


From kasimov at i.com.ua  Wed Apr 20 12:38:50 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 19:38:50 +0300
Subject: Troll? was: Re: goto statement
In-Reply-To: <mailman.2184.1114013215.1799.python-list@python.org>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>	<d45to7$g02$1@news.tsystems.kiev.ua>
	<mailman.2184.1114013215.1799.python-list@python.org>
Message-ID: <d460o7$g7j$1@news.tsystems.kiev.ua>

Andr? Roberge wrote:
> Maxim Kasimov wrote:
> 
>>
>> by the way, "goto" statement will be useful for writing more powerful 
>> obfuscators
>>
> Let me get that clear: you want a goto to help with debugging.
> 
> And you want to obfuscate your code even more?
> 
> !?
> 
> Perhaps you need to write in Perl, or some other similar language.
> 
> Writing in Python is for those that seek clarity (not obfuscation) and 
> less bugs.   Which is why a goto statement should definitely never be 
> part of Python!
> 
> Andr?
> 

so insulting to me - you asking i'm a troll, only becose i'm saing that goto maybe sometimes usefull.

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From harlinseritt at yahoo.com  Sat Apr 30 05:04:33 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 30 Apr 2005 02:04:33 -0700
Subject: Writing to log file when script is killed
Message-ID: <1114851873.072376.225820@z14g2000cwz.googlegroups.com>

I am looking for a way for my script to write to a log file saying
something like this:

I was killed at time.asctime()

I would like to be able to do this if/when the script is killed by
means rather than my own. How in the world would I accomplish this?

Thanks,

Harlin



From fred.dixon at gmail.com  Tue Apr  5 11:29:14 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 5 Apr 2005 08:29:14 -0700
Subject: terminating an inactive process
In-Reply-To: <mailman.1309.1112637308.1799.python-list@python.org>
References: <1112454348.28947.40.camel@dulcevida>
	<mailman.1309.1112637308.1799.python-list@python.org>
Message-ID: <1112714954.765416.51700@o13g2000cwo.googlegroups.com>

if you have pywin32 then check out a download from MS download called
script-o-matic2.

it will write some boilerplate code that is usefull for killing
processes.

its wmi based but works nicely. i have a script that i run on my home
computer if you want a sample.



From RonGrossi382636 at yahoo.com  Sat Apr 16 23:12:15 2005
From: RonGrossi382636 at yahoo.com (RonGrossi382636 at yahoo.com)
Date: 16 Apr 2005 20:12:15 -0700
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 141)
Message-ID: <1113707535.383715.327170@g14g2000cwa.googlegroups.com>


The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrongdoing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

Jesus said "I am the way, the truth and
the life: no one can come to the
Father(in Heaven), but by me."
(John 14:6)

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.


Praise the Lord!
Servant of the Lord Jesus Christ
Ronald L. Grossi

*Show this to your family and friends so
they can know that they have a choice
where they will spend eternity. Thanks!

____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.browser.to/jesus-animation

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.bibledatabase.net


____________________________________________________



From bokr at oz.net  Mon Apr 18 23:31:24 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 03:31:24 GMT
Subject: grammar for where/letting/with and suite expressions (thunks etc)
Message-ID: <42647620.311357578@news.oz.net>


We have where syntax in combination with suite expression syntax (bear with me,
I think a good synergy will emerge ;-)

http://groups.google.co.uk/groups?selm=mailman.403.1105274631.22381.python-list%40python.org
http://groups.google.co.uk/groups?selm=3480qqF46jprlU1%40individual.net

are the key referneces for background (I'm just repeating from Oren's post for convenience).

The first suggests a grammar mod for its proposed "with" (rather than the name "where"),
but it doesn't cover the variations we are discussing now.

If "where" is not a good word, and "with" is destined for use that may clash, how about "letting"
or if that's too long, "per" ? Anyway, the new stuff adds the new compound statements

Here's a cut at Grammar modifications: (though I guess the grammar in

    http://www.python.org/doc/current/ref/grammar.txt

is really closer to actual parsing. BTW, how is the Grammar file that comes with the sources maintained along with the former?
E.g., I didn't see how the latter parses a non-assignment expression as a statement, e.g.
     NAME '(' ')'
Maybe I have a glitched version of Grammar?

But anyway, since I did this already, it will serve as a sketch:

compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef | letting_stmt | named_suite_stmt
small_stmt: tiny_stmt | flow_stmt | import_stmt | global_stmt | exec_stmt
tiny_stmt:  expr_stmt | print_stmt  | del_stmt | pass_stmt | import_stmt | assert_stmt

letting_stmt: tiny_stmt 'letting' ( let_stmt | ':' suite )
let_stmt: named_suite_stmt | assignments_stmt
assignments_stmt: expr_stmt??

named_suite_stmt: NAME suite_expr
suite_expr: '::' suite | parameters ':' suite | 'def' parameters ':' suite


I split out a tiny_stmt subset of small_stmt so we won't accept "continue letting x=5" and such.

Basically we have either

    <tiny_stmt> letting:
         <suite>  # meaning any possible suite, but obviously should concern itself
                  # with binding names for tiny_stmt to use

or
    <tiny_stmt> letting <let_stmt>

where <let_stmt> binds names by assignment, or by a named_suite_stmt, e.g, (assuming a bare expression is parsed as an expr_stmt)

      foo(x) letting x=1  # simple let_stmt as assignmerns_stmt
      foo(x, y) letting x,y = 1,2 # assignments_stmt should exclude augassign operators so is not ==
      safe_open(tk, 'data.txt') letting tk(f):
          # this suite is thunk tk's body, called back by foo, passing safely opened f as arg
          longest = max(len(line) for line in f) # save result longest in local namespace

If you put the ':' after letting, you introduce a general suite whose bindings will override any name bindings
otherwise used by the preceding tiny_stmt, e.g, the above in letting: form
      
      foo(x) letting:
          x=1  # simple let_stmt as assignmerns_stmt
      foo(x, y) letting:
          x,y = 1,2 # assignments_stmt should exclude augassign operators so is not ==
      safe_open(tk, 'data.txt') letting:
          tk(f):
              # this suite is thunk tk's body, called back by foo, passing safely opened f as arg
              longest = max(len(line) for line in f) # save result longest in local namespace

Note that tk(f): and its suite work just like a def, except for binding a thunk instead. You can also
bind tk to the thunk expression, analogous to binding a lambda to what a def name would bind, e.g.,
This is will do the same as above, though the isolated (f): may look unfamiliar, ;-)
      safe_open(tk, 'data.txt') letting:
          tk = (f):
              # this suite is thunk tk's body, called back by foo, passing safely opened f as arg
              longest = max(len(line) for line in f) # save result longest in local namespace

Since letting: introduces a full-fledged suite, nested lettings of both kinds become possible, e.g.

      foo(tk, func, *args, **kw) letting:
          kw = dict(tuplist) letting:
              tuplist = [(1,'one'), (2,'two')] # silly example
          args = d.values() letting d:: # d becomes dict of suite bindings
              a = 123
              def foo(x):
          tk(logitem):                  # tk becomes thunk with body defined in following suite
              print logitem
          def func(x, y):               # func is ordinary but transient function
              return 'Hi from fun with', (x,y)          
            
What I haven't covered is the same-indentation aligned 'with' following a statement, as seems permitted
in Nick reference post where he says
"""
Grammar Change
--------------
Current::
   statement ::=    stmt_list NEWLINE | compound_stmt

New::
   statement ::=    (stmt_list NEWLINE | compound_stmt) [local_namespace]
   local_namespace ::= "with" ":" suite
"""

I'll have to leave that for now. Anyway, hope this all evolves into something neat ;-)

Actually, I don't like "letting" that much as the word. I keep having to type where^H^H^H^H^Hletting ;-)
"per" would be short, but maybe not mnemonic enough. "with" might be good, but I am allowing
with not to have a colon, e.g. with a single thunk definition for a function call:

      final_status = safe_open(tk, 'data.txt') with tk(f):
          longest = max(len(line) for line in f)

Since my 'letting' is effectively a tiny_stmt trailer and anticipated with usage is more header like,
maybe that is enough to disambiguate. I'll have to see the future with grammar.


Hm, Let's see if Nick Coghlan's summary of examples can be handled with letting:

Examples
--------

# Statement local functions (from Andrey Tatarinov)
#   aka How to cope if lambda goes away :)
res = [ f(i) for i in objects ] with:
    def f(x):
        #do something
OK as is.

# Declaring properties (from Nick Coghlan)
class C(object):
    x = property(get, set) with:
        def get(self):
            pass
        def set(self, value):
            pass
OK as is.

# Design by contract (from Nick Coghlan)
@dbc(pre, post)
def foo():
   pass
with:
   def pre():
     pass
   def post():
     pass

Problem, but if decorator expressions were allowed to have letting,

    @dbc(pre, post) letting:
        def pre(): pass
        def post(): pass
    def foo():
        pass

# Singleton classes (from Paul Rubin)
C = C() with:
   class C:
     pass
OK as is.

# Complex default values (from Carlos Ribeiro)
def f(x=default()):
   pass
with:
   def default():
     pass

Since this is not decorated, I can do it with an anonymous def suite expression
which, being an expression (making the whole a simple expr assignment) allows letting:

f = def(x=default()):
       pass
    letting: # dedent to this line ends anonymous def suite and goes back to expression context
       def default():
          pass

To show the expression nature better, (not that it's a preferred spelling ;-),
the expression is parenthesized, and closes  with the closing ')'

f = (def(x=default()):
       pass
    ) letting:
       def default():
          pass
or uglier:
f = (def(x=default()):
       pass) letting:
           def default():
              pass

You could even write a one-liner for this, since the suites are one-liner passes ;-)

f = (def(x=default()):pass) letting default=(def():pass)

So there was really only a problem with the decorator.
But I gotta go for now.

Regards,
Bengt Richter


From ivanlan at pauahtun.org  Fri Apr  8 13:40:15 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Fri, 08 Apr 2005 11:40:15 -0600
Subject: Interpreter problem
References: <425684F8.5060507@novasyshealth.com>	<mailman.1538.1112970334.1799.python-list@python.org>
	<1112973979.536233.278780@l41g2000cwc.googlegroups.com>
	<d36bfc$gdl$2@sea.gmane.org>
Message-ID: <4256C1FF.460EBFF5@pauahtun.org>

Hi All--

Steve Holden wrote:
> 
> > It's odd that deleting the line and reentering it on the Linux box did
> > not correct the problem.  Perhaps vim recognized the format as having
> > cr-lf and inserted it even though I was editing on Linux.
> >
> > Anyhow, it would have been a long time before I got this one.  Thanks.
> >
> A pleasure - just passing on payback for the huge amounts of help I've
> had here myself. See also my post in reply to rbt's latest for remarks
> on other possible fixes using vim.
> 

Vim is pretty smart.  If you edit something in DOS mode, it'll preserve
it.  If you edit it in UNIX mode, it'll preserve that too.  Thus, if you
copy a dos file to a unix and edit with vim on both systems, it'll stay
dos unless you change it; this is a Good Thing(tm).  You run into
problems with mixed line endings, or when it makes a difference to the
program/OS (the shebang trick).

In vim, if you run

:se fileformat?

it'll tell you exactly what file format you're using.  The choices are
(surprise) unix and dos.

To change the file format of a file explicitly, simply issue the command

:set fileformat=dos

or 

:set fileformat=unix

When you write the file, it'll be saved exactly the way you specify.

Note that you get the ^M at the ends of lines when a file you've been
editing in one mode shifts to another and you have to reload the file. 
Reading [open(foofile,"rb")] & re-writing [open(foofile,"wb")] a file
will do this if you are not excruciatingly careful.

If you don't have dos2unix on your win system, but do have cat, you can
use cat -d.

#!/bin/sh
cat -d $1 > snot
mv snot $1

(Prone to error, of course.)

<insert-std-disclaimers-about-vim-vs-classic-vi-behaviours-here>-ly
y'rs,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From merkosh at hadiko.de  Tue Apr 12 10:19:00 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 16:19:00 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
Message-ID: <d3glck$s7u$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 14:51 pm Michele Simionato wrote:

> No. Not everybody knows about Singleton. It is an acquired knowledge.

Well, what isn't? 
What I ment to say, but failed to do so more explicitly, was that it is a
term I felt which was generally known to "the programming society". Or that
it is a term that might pop up in a comunity where software design is an
issue.
This of course does not mean that you could not have used it without knowing
that someone had thought of a fancy name for it. 

[...]
> It was only after many months that I understood that there was really
> nothing
> more to it. 

I agree. There really isn't much to Singletons. There was a time when I also
did not know about Singletons or design pattern in general. But thats
always the case somehow, somewhere. 

[...] 
> In my lectures at Oxford next week I have carefully expunged anything
> referring to Singletons ;)

Perhapts you shouldn't. Otherwise people might stumble over the same problem
you did. 

> IMNSHO, the property "there is only one" is not important enough to
> deserves
> a name. 

The problem here is: it has already a name. It is the probably most simple
pattern there is. And if only it serves as a mind-boggingly example of a
design pattern, why not call it a "singleton". Why call it a "class that
can only be instanciated once"?
I do not yet feel there is being made too much fuss about it. People do not
start name-dropping on singletons. Design pattern in general, perhaps. 

> The property "if you have already called this callable with the 
> same arguments you don't need to recompute it" instead is quite worthy
> and subsumes the other concept as a special case. It also gives you
> plenty of use case to illustrate it, even to beginner programmers.

To step in your argument, you could also call that "caching a function
call".

BTW: @memoize on the __new__ method isn't quite enough. You'll have to call
it on __init__ as well, otherwise it is executed again on the already
initialised object.
Also calling @memoize on the __init__ does not suffice either, because can
call it with different parameters...

Ciao
Uwe     


From paschott at no.yahoo.spamm.com  Fri Apr 29 14:54:54 2005
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Fri, 29 Apr 2005 18:54:54 GMT
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<a6v2711u3hft7ed2ft95gqiggi2cnaak2r@4ax.com>
Message-ID: <32r471h0nnq5aieeip6p83bpo54fcv9ooq@4ax.com>

That looks promising.  The field numbers are pre-defined at the mainframe level.
This may help me get to my ultimate goal which is to pump these into a DB on a
row-by-row basis ( :-P  )  I'll have to do some playing around with this.  I
knew that it looked like a dictionary, but wasn't sure how best to handle this.

One follow-up question:  I'll end up getting multiple records for each "type".
Would I be referencing these by row[#][field#]?

Minor revision to the format is that starts like:
###,1,1,val_1,....


I think right now the plan is to parse through the file and insert the pairs
directly into a DB table.  Something like RowID, LetterType, date, Field#,
Value.  I can get RowID and LetterType overall, date is a constant, the rest
would involve reading each pair and inserting both values into the table.  Time
to hit the books a little more to get up to speed on all of this.

I really appreciate the help.  I knew there had to be a better way to do this,
just wasn't sure what it was.

-Pete


John Machin <sjmachin at lexicon.net> wrote:

> On Thu, 28 Apr 2005 23:34:31 GMT, Peter A. Schott
> <paschott at no.yahoo.spamm.com> wrote:
> 
> >I've got a file that seems to come across more like a dictionary from what I can
> >tell.  Something like the following format:
> >
> >###,1,val_1,2,val_2,3,val_3,5,val_5,10,val_10
> >###,1,val_1,2,val_2,3,val_3,5,val_5,11,val_11,25,val_25,967,val_967
> >
> >In other words, different layouts (defined mostly by what is in val_1, val_2,
> >val_3).
> >
> >The ,#, fields indicate what "field" from our mainframe the corresponding value
> >represents.
> >
> >Is there a good way to parse this into a DB-type format where I only pull out
> >the values corresponding to the appropriate field numbers?  Seems like
> >converting to a dictionary of some sort would be best, but I don't quite know
> >how I would go about that.
> >
> >In this case, the first field is a value unto itself - represents a "letter
> >type" that would be associated with the rest of the record.  The fields are
> >either present or not, no placeholder if there's no value for e.g. Field #4.
> 
> Here's a sketch, tested as you'll see, but totally devoid of the
> error-checking that would be necessary for any data coming from an MF.
> 
> C:\junk>type schott.txt
> pers,1,xxx,2,yyy,3,zzz,100,SMITH,101,JOHN,102,ALOYSIUS,103,1969-12-31
> addr,1,qqq,2,www,3,eee,200,"""THE LODGE"", 123 MAIN ST",205,WALLA
> WALLA,206,WA
> 
> C:\junk>type schott.py
> import csv
> for row in csv.reader(open('schott.txt', 'rb')):
>     rectype = row[0]
>     recdict = {}
>     for k in range(1, len(row), 2):
>         recdict[int(row[k])] = row[k+1]
>     print rectype, recdict
> 
> C:\junk>python schott.py
> pers {1: 'xxx', 2: 'yyy', 3: 'zzz', 100: 'SMITH', 101: 'JOHN', 102:
> 'ALOYSIUS', 103: '1969-12-31'}
> addr {1: 'qqq', 2: 'www', 3: 'eee', 200: '"THE LODGE", 123 MAIN ST',
> 205: 'WALLA WALLA', 206: 'WA'}
> 
> Hint: you'll probably go nuts if you don't implement some sort of
> naming convention instead of those numbers.
> 
> One way would be like this:
> 
> mf_surname = 100
> mf_given_1 = 101
> ...
> mf_state = 206
> 
> then you can refer to recdict[mf_state] instead of recdict[206].
> 
> Going upmarket a bit:
> 
> Have a mf_map = {100: 'surname', 206: 'state', } # etc etc
> 
> then you do
> 
> class Record(object):
>     pass
> 
> # for each row:
>    rec = Record()
>    rec.rectype = row[0]
>    for k in range(1, len(row), 2):
>        setattr(rec, mf_map[int(row[k])], row[k+1])
> 
> Then you can refer to rec.state instead of recdict[mf_state] or
> recdict[206].
> 
> Further upmarket would involve gathering basic "type" information
> about the MF fields (free text, alpha code, identifier (e.g. SSN),
> money, quantity, date, etc etc) so that you can do validations and
> format conversions as appropriate.
> 
> HTH,
> John
> 
> 



From peter at engcorp.com  Wed Apr 20 11:48:45 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 11:48:45 -0400
Subject: goto statement
In-Reply-To: <mailman.2158.1113989043.1799.python-list@python.org>
References: <mailman.2158.1113989043.1799.python-list@python.org>
Message-ID: <dqCdneMCDr764fvfRVn-tA@powergate.ca>

praba kar wrote:
>    In Python what is equivalent to goto statement

The group has been remiss, starting mainly with Mage's
unfortunately dogmatic response.

What we meant to ask was this: why do you want it?

There are better, simpler, cleaner, more readable
ways to accomplish what you are trying to do, if you'll
only tell us what that is so we can show you.

-Peter


From steve at holdenweb.com  Sat Apr  2 00:40:15 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 02 Apr 2005 00:40:15 -0500
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <1498066.d23UzBfE8y@yahoo.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<1498066.d23UzBfE8y@yahoo.com>
Message-ID: <d2lb4r$shg$2@sea.gmane.org>

alex goldman wrote:
> Daniel Silva wrote:
> 
> 
>>At any rate, FOLD must fold.
> 
> 
> I personally think GOTO was unduly criticized by Dijkstra. With the benefit
> of hindsight, we can see that giving up GOTO in favor of other primitives
> failed to solve the decades-old software crisis.

What software crisis? Knuth (among others) has demonstrated that it's 
possible to do structured programming in assembly language (though I 
have to say that not all his MIX was particularly well-structured).

The danger in GOTO is that it allows the undisciplined programmer to 
develop a badly-structured solution to a programming problem. A 
disciplined programmer will write well-structured code with whatever 
tools come to hand.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From joeyjwc at gmail.com  Wed Apr  6 18:40:43 2005
From: joeyjwc at gmail.com (Joey C.)
Date: 6 Apr 2005 15:40:43 -0700
Subject: Best editor?
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <1112827243.578968.237010@z14g2000cwz.googlegroups.com>

When I'm using Windows, I have found the Syn TextEditor
(http://syn.sourceforge.net) to be quite useful.  It has basic syntax
highlighting, about enough for me and is quite compatible with FTP and
such.  It supports Python pretty well.  Its user interface is quite
easy yet pretty powerful.  All in all, this is a very good editor, good
enough that I probably won't go looking for another one any time soon.

On Linux however (which I haven't used in quite some time, sadly), I
usually use vim more than emacs.  To tell you the truth, I haven't
really used emacs that much at all, only for a short time.  I keep
meaning to actually try it out and get used to it, but I always find
that if I need to edit a file quickly, I just go to vim.  Then again, I
don't write much Python code in Linux anyways.  Even so, I intend to
try emacs out soon.



From sjmachin at lexicon.net  Thu Apr 28 21:05:51 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 29 Apr 2005 11:05:51 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
Message-ID: <7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>

On Fri, 29 Apr 2005 01:44:30 +0100, Michael Hoffman
<cam.ac.uk at mh391.invalid> wrote:

>for row in csv.reader(fileinput.input()):

csv.reader requires that if the first arg is a file that it be opened
in binary mode.




From mfranklin1 at gatwick.westerngeco.slb.com  Thu Apr 14 09:20:41 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 14 Apr 2005 14:20:41 +0100
Subject: Tk Listbox - Selected Item ?
In-Reply-To: <pan.2005.04.14.12.05.18.839662@optushome.com.au>
References: <pan.2005.04.14.12.05.18.839662@optushome.com.au>
Message-ID: <d3lqgu$9nj$1@sea.gmane.org>

Peter Moscatt wrote:
> I am having trouble understanding the methods for the Listbox from Tk.
> 
> If I was to select at item in the list using a mouse click (have already
> created the bind event) - what method returns the text of the selected
> item ?
> 
> Pete
> 


Pete,

pydoc Tkinter.Listbox

<snip>

  |  curselection(self)
  |      Return list of indices of currently selected item.
  |
  |  delete(self, first, last=None)
  |      Delete items from FIRST to LAST (not included).
  |
  |  get(self, first, last=None)
  |      Get list of items from FIRST to LAST (not included).

So to get the value of the selected item:

lb.get(lb.curselection()[0])


provided the listbox is in single selection mode or only one item is
selected

Martin




From michele.simionato at gmail.com  Tue Apr 12 06:09:48 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Apr 2005 03:09:48 -0700
Subject: singleton objects with decorators
In-Reply-To: <ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
Message-ID: <1113300588.335527.26290@o13g2000cwo.googlegroups.com>

Steven Bethard:
> It strikes me that I've never wanted or needed a singleton object.
> Would you mind sharing your use case?  I'm just curious.

"Singleton" is the most idiotic pattern ever. If you want an instance,
just
instantiate your class once. If a class should have only one instance,
you can just document it. What I find usuful is "memoize", which
contains "Singleton" as a special case. So I use memoize even
for singleton would-be, i.e. logfiles and databases connections
(memoizing the connections, if I try to open a database twice with the
same parameters, I am returned an instance of the already opened
database).

             Michele Simionato



From deetsNOSPAM at web.de  Thu Apr 21 11:06:07 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 21 Apr 2005 17:06:07 +0200
Subject: How can I verify that a passed argument is an interible
	collection?
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <d48fgr$2rm$00$2@news.t-online.com>

Charles Krug wrote:

> List:
> 
> I'm working on some methods that operate on (mathematical) vectors as
> in:
> 
> def Convolution(x, y)
> """Returns a list containing the convolution of vectors x and y"""
> 
> Is there any way to determine at runtime that x and y are iterible
> collections?
> 
> Do I *coughs* simply *coughs* trap the exception created by:
> 
>     for v in x:
> 
> when v is a scaler quantity?

Yes, thats considered good practice. 
-- 
Regards,

Diez B. Roggisch


From mahs at telcopartners.com  Fri Apr 22 17:20:01 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 22 Apr 2005 14:20:01 -0700
Subject: python LEX
In-Reply-To: <864qdztkgu.fsf@guru.mired.org>
References: <d47mli$d1v$1@bagan.srce.hr>	<mailman.2214.1114081654.1799.python-list@python.org>
	<864qdztkgu.fsf@guru.mired.org>
Message-ID: <d4bpga$140$1@sea.gmane.org>

Mike Meyer wrote:

...
> 
> Trouble is, he wants a lexer, not a parser. The lexer in the sources
> is an ad-hoc package, contained in Parser/tokenizer.c.
> 
>    <mike

There is also tokenize.py in the standard library, which might be an easier 
reference

"""
...
It is designed to match the working of the Python tokenizer exactly, except
that it produces COMMENT tokens for comments and gives type OP for all
operators
...
"""

Michael





From luismgz at gmail.com  Sun Apr 17 00:54:04 2005
From: luismgz at gmail.com (Luis M. Gonzalez)
Date: 16 Apr 2005 21:54:04 -0700
Subject: Python's use in RAD
In-Reply-To: <mailman.1972.1113576517.1799.python-list@python.org>
References: <mailman.1972.1113576517.1799.python-list@python.org>
Message-ID: <1113713644.305465.176680@g14g2000cwa.googlegroups.com>

Check this out: http://pythoncard.sourceforge.net/



From vincent at visualtrans.de  Wed Apr 20 14:24:07 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Wed, 20 Apr 2005 20:24:07 +0200
Subject: using locales
References: <1114013918.059442.30770@l41g2000cwc.googlegroups.com>
Message-ID: <d466o7$mei$1@news4.zwoll1.ov.home.nl>


<garykpdx at hotmail.com> schrieb im Newsbeitrag 
news:1114013918.059442.30770 at l41g2000cwc.googlegroups.com...
|
| Is there some sort of tutorial on locales or the locale module?
|
| I can't seem to find a list showing all possible locales. I made 'en'
| work alright, but when I tried 'de' or 'de_DE' or 'es_ES', etc. it said
| that those were not valid locaes. Worst of all, when I tried 'es' it
| said that this was estonian?! Obviously, this is not what ISO 639 says.
| 'es' should be Spanish, and Estonian should be 'et.

What makes you think that the underlying C-runtime library cares about
ISO639? If you're on Windows (which from what you've written I assume you 
are), you might want to look at:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_language_strings.asp

(Unfortunately, I know for a fact that this list is *not* exhaustive, at 
least not for WIN2K or XP.)

In addition, you might want to keep in mind - and again this applies to the 
Windows platform - that what is returned by locale.getdefaultlocale is not 
suitable as input for the the country/language argument of locale.setlocale 
(which is somewhat of a pitty, cause I sometimes wish I could do something 
like "locale.setlocale(locale.LC_ALL, 
".".join(locale.getdefaultlocale())" ).

However, if you really need super-deluxe localization/national language 
support independent of the C runtime on Windows you may need to wrap the 
appropriate functions living in winnls.h (or the version of winnls.h 
contained in the platform SDK) - some of which may have already found there 
way into the Python for Win32 Extensions (GetDateFormat for example).


Regards,

--

Vincent Wehren

|
| Anyway, I'd love to have a method called get_available_locales to tell
| me what I can use on my machine, or something like that.
|
| Can anyone tell me how I *do* get these names?
|
| Thanks
| 




From gry at ll.mit.edu  Fri Apr 22 13:38:55 2005
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 22 Apr 2005 10:38:55 -0700
Subject: __init__.py question
In-Reply-To: <1114172352.208471.158410@o13g2000cwo.googlegroups.com>
References: <1114172352.208471.158410@o13g2000cwo.googlegroups.com>
Message-ID: <1114191535.892372.9940@l41g2000cwc.googlegroups.com>

from mynewdir import abc
abc.doFoo()

or

import mynewdir.abc
newdir.abc.doFoo()



From Sebastien.Boisgerault at gmail.com  Mon Apr 18 09:16:28 2005
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 18 Apr 2005 06:16:28 -0700
Subject: fpectl
Message-ID: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>

Hi all,

Can anybody tell me why I can't load the fpectl module in my Python
interpreter:

>>> import fpectl
Traceback: ...
...
ImportError: No module named fpectl

My platform is Linux (Mandrake 10.x) + Python2.4, built from the
(python.org) sources and configured with the --with-fpectl option.

Any idea ? Is the Python Library Reference obsolete on this point or
did I miss something ?

I have understood from the previous posts on the subject that the whole
floating-point issue (or specifically IEEE 754 support) is quite
complex
and highly platform-dependent. Therefore I guess that I cannot take for
granted the expected behavior of fpectl functions. But at least I
should
be able to import it, shouldn't I ? 

Cheers,

S.B.



From peter at engcorp.com  Thu Apr 21 10:06:28 2005
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 21 Apr 2005 10:06:28 -0400
Subject: recording data between [ and ]
In-Reply-To: <d488q5$apl$1@solaris.cc.vt.edu>
References: <d488q5$apl$1@solaris.cc.vt.edu>
Message-ID: <UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>

rbt wrote:
> Output from 'netstat -b' on a win2003 server will show what binary is 
> responsible for the connection. For example, it may list something like 
> this along with other connection specific data:
> 
> [lsass.exe]
> [System]
> [firefox.exe]
> [iexplorer.exe]
> 
> How might I process the output so that anything within brackets is 
> recorded to a log file of my own making? I know how to parse and record 
> things to a file, I don't know how to look make '[' and ']' appear as 
> special characters so that I can record what's between them.

Does this help?

 >>> import re
 >>>
 >>> s = '''stuff   [lsass.exe]
... [System]  more stuff
... xxxxx [firefox.exe] ......
... '''
 >>>
 >>> re.findall(r'\[([^]]*)\]', s)
['lsass.exe', 'System', 'firefox.exe']

-Peter


From bior_jobs at yahoo.com  Thu Apr 28 10:15:19 2005
From: bior_jobs at yahoo.com (bior_jobs at yahoo.com)
Date: 28 Apr 2005 07:15:19 -0700
Subject: Job openings for scientifically-oriented programmers
Message-ID: <1114697719.643475.284220@o13g2000cwo.googlegroups.com>

Positions:  Scientific Programmers

Location:  Department of Radiation Oncology, Division of Bioinformatics
and Outcomes Research, Washington University School of Medicine, St.
Louis, Missouri

Our newly created Division of Bioinformatics and Outcomes Research has
immediate openings for scientifically-oriented programmers.  We are
developing software systems for clinical and research use, including
storage and visualization of three-dimensional image datasets as well
as radiation therapy dose distributions (see our web-page at
http://radium.wustl.edu/cerr). The successful candidates would be
involved in various projects which require software development,
possibly including image visualization, data re-formatting,
optimization techniques, parallel processing, database construction,
and other aspects of radiation therapy treatment planning and outcomes
research.  Strong computational and mathematical skills are needed.
The Dept. of Radiation Oncology has a large clinical service in the use
of radiation to treat cancer, as well as a large, active, academic
group involved in a full range of radiotherapy research activities.
Helpful experience would include scientific programming (any language),
matrix language programming (Python, Fortran90, Matlab, IDL, PVWave, or
similar), related course work, and a strong interest in scientific
programming.  Beginning salary depends on experience and background.
The positions begin as soon as July 1, 2005.

Interested candidates should e-mail a resume, including GPAs if
recently graduated or still a student.  Contact:  Joseph Deasy, Ph.D.,
Associate Professor of Radiation Oncology and Director, Division of
Bioinformatics and Outcomes Research, Dept. of Radiation Oncology,
Washington University School of Medicine, at the email address:
bior_jobs at yahoo.com.  Washington University School of Medicine is an
equal opportunity, affirmative action employer, and we encourage
minorities to apply.



From tommy.nordgren at chello.se  Thu Apr 21 00:20:17 2005
From: tommy.nordgren at chello.se (Tommy Nordgren)
Date: Thu, 21 Apr 2005 06:20:17 +0200
Subject: Embedding & Extending Python &other scripting languages
Message-ID: <tommy.nordgren-8162EF.06201721042005@amstwist00.chello.com>

I'm interested in doing a rather ambitious project concerning compiler
construction tools. 
My tools will parse specification files containing for example lalr
parser specifications.
The specifications will contain embedded semantic actions which i want to
allow writing in any object-oriented language.
The specifications will name a scripting language and a target language 
module . Then my tool will create an embedded interpreter for the 
scripting language, which will load a target language module written in 
the scripting language, and use it to generate code in the target 
language.

I want to provide my system as open source.

Now my basic problem is how to find what scripting languages are 
installed on a users system, and generate the necessary makefiles 
automatically. I will be using swig for interface creation.
I want to support at least perl and python, with target language support 
for at least java and c++ initially.

I probably want to support codegenerators written in ruby and tcl as 
well.

Any help would be appreciated.

I prefer email replies to <tommy.nordgren at chello.se>


Stockholm, April 21, 2005
Tommy Nordgren


From pitonero at gmail.com  Sat Apr  2 15:29:20 2005
From: pitonero at gmail.com (El Pitonero)
Date: 2 Apr 2005 12:29:20 -0800
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112459975.790455.122900@z14g2000cwz.googlegroups.com>
	<6eqt41pu0m7l7f2mtoi0sg6ebbntn3u2kv@4ax.com>
Message-ID: <1112473760.005810.14840@z14g2000cwz.googlegroups.com>

Ron_Adam wrote:
> On 2 Apr 2005 08:39:35 -0800, "Kay Schluehr" <kay.schluehr at gmx.net>
> wrote:
>
> >There is actually nothing mysterious about decorators.
>
> I've heard this quite a few times now, but *is* quite mysterious if
> you are not already familiar with how they work.  Or instead of
> mysterious, you could say complex, as they can be used in quite
> complex ways.

If the syntax were like:

decorator = function(d_arg) {
    return function(f) {
        return function(f_arg) {
            new_arg = f_arg+'-'+d_arg;
            return f(new_arg);
        }
    }
}

func = decorator('Goodbye') function(s) {
    return s;
}

Would you think it would be more easily understandable? Here,
"function()" is a metafunction (or function factory) whose role is to
manufacture a function given a parameter spec and a code body. And in
the expression

func = decorator('Goodbye')(function(s){return s;})

one pair of outter parenthesis have been omitted. Sure, it's not as
readable as Python's "def", but with today's syntax highlighters, the
special word "function" can be highlighted easily.

If the decorator does not have parameters, one has:

func = decorator function(s) {
    ....
}

or in the general case:

func = deco1 deco2 deco3 function(s) {
    ....
}



From steve at holdenweb.com  Mon Apr  4 11:10:21 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 04 Apr 2005 11:10:21 -0400
Subject: How to reload local namespace definitions in the python
	interpreter?
In-Reply-To: <3b7an1F6gf5b4U1@individual.net>
References: <1112435996.697236.231800@l41g2000cwc.googlegroups.com>
	<3b7an1F6gf5b4U1@individual.net>
Message-ID: <d2rl92$i62$1@sea.gmane.org>

Tim Jarman wrote:
> test1dellboy3 at yahoo.co.uk wrote:
> 
> 
>>Hi,
>>
>>I am a beginner using the python interpreter. To reduce typing effort,
>>I created a module called "aliases.py" containing some aliases for
>>objects I commonly use like -
>>
>>aliases.py :
>>
>>
>>import filecmp, os, commands
>>
>>op = os.path
>>go = commands.getoutput
>>dc = filecmp.dircmp
>>p1 = '/mnt/usbkey/flash/'
>>p2 = '/mnt/fat32/myfiles/flash/'
>>
>>When I start up the interpreter, I can simply type -
>>
>>from aliases import *
>>
>>This works fine, but each time I change any of the definitions in
>>aliases.py, I
>>have to restart the interpreter and type "from aliases import *"
>>again. Is there any way to reload these definitions without restarting
>>the interpreter?
>>
>>-Slath
> 
> 
> reload(aliases)
> 
Unfortunately a simple reload of the module won't result in the required 
changes to the local namespace:

$ cat test87.py
val = 33

  >>> from test87 import *
  >>> print val
33
  >>> val = 42
  >>> reload(test87)
<module 'test87' from 'test87.pyc'>
  >>> print val
42
  >>>

> See: http://www.python.org/doc/2.4.1/lib/built-in-funcs.html
> 
> By the way, are you aware of the import ... as ... idiom?
> e.g. import os.path as op
> 

This would, of course, require the user to qualify the names by 
prefixing them with "op.".

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From whocaresrmb at yahoo.com  Thu Apr 28 03:17:06 2005
From: whocaresrmb at yahoo.com (Johnny Gentile)
Date: 28 Apr 2005 00:17:06 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
Message-ID: <1114672626.355526.266770@g14g2000cwa.googlegroups.com>

Can we stop crossposting this shit to the Beatles NG, please?
Donald L McDaniel wrote:
> Matt Hayden wrote:
> > Johnny Gentile wrote:
> >> C'mon. Everyone knows God plays a Martin.
> >
> > I dunno.  I think God has a honkin' big collection so he won't
offend
> > ANY luthiers when they come to visit.  SOMEONE has to set up his
> > guitars...
> >
> > mh
>
> 1) God is a Being Who lives in Eternity and Infinity.
>
> 2) God is not a man.  However, His Son, Christ Jesus, left the
loftiness of
> Eternity and became a Man without losing His God-Substance  which He
> receives from His Father.  This means He is not just a man, but the
God-Man.
>
> 3)He lived a pure, sinless life, and died on the Cross in our place,
as the
> Sacrifice for our sins.  However, He did not remain in the Tomb HE
was
> placed in after He was taken down from the cross by those who loved
Him.
> Within three days, HE was raised from the dead by His Father, still
the
> God-Man.  After 40 days on the earth, He was returned to the Father
in His
> Body of flesh, tho now It was glorified (made eternal by the Father).
 There
> He is to this very day, interceeding for those who have received Him
as the
> Anointed One of God.
>
> 4) One day, hopefully, soon, He will return in Power and Glory to
judge the
> thoughts of all men, and transfer His servants from their bodies of
flesh to
> glorified bodies, like His.
>
> Do not try to reason this out, since the Incarnation of Christ is not
a
> thing of logic and reason, but a Holy Mystery, only comprehended by
faith in
> those who have put their hope and trust in Him and His Sacrifice on
the
> Cross.  Faith can easily be understood by a man with an open mind:
Let us
> say that there is a Sargent in the Army;  his commanding officer, a
General,
> whose desk is a thousand miles away, and whom he has never seen,
gives him a
> letter containing an order.  The Sargent's act of obedience to the
order can
> be explained as "faith", since he never saw the General, and obeys
him
> simply because he is his commanding officer.  While we have never
seen the
> Father, we obey Him, because He sent a Man with orders from Him for
His
> servants.
>
> Not only that, but this simple faith is testified to by the Holy
Spirit
> after we obey, and our steps of faith are rewarded with experiential
> knowledge of God, as we learn to recognise His Hand in our lives.  We
obey
> God simply because His Son and servants tell us to.  Through time and

> experience, we have learned to trust His Words, because they come to
pass,
> in His Time, and in His Way.
>
> 4) I doubt seriously whether God plays a guitar, since guitars are
made by
> men, for men.  His Son could theoretically play a guitar.  Perhaps He
does.
> Perhaps He doesn't.  Only the Father and His Holy Angels know.
>
> --
> Donald L McDaniel
> Please reply to the original thread,
> so that the thread may be kept intact.
> ==============================



From sidharth.kuruvila at gmail.com  Sat Apr  9 05:21:45 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Sat, 9 Apr 2005 14:51:45 +0530
Subject: check instace already running...
In-Reply-To: <2ab2ed5505040902024cc47944@mail.gmail.com>
References: <hpM5e.36121$IN.685498@twister2.libero.it>
	<2ab2ed5505040902024cc47944@mail.gmail.com>
Message-ID: <2ab2ed55050409022151a924d1@mail.gmail.com>

I haven't tested this. There is probably a better way of doing this
looking at process information. I use a lock file to mark that the
program is already running. The problem is that for an abrupt shutdown
the file might not be removed.

import atexit
if os.path.exists(lockfile):
   print "there is an instance already running"
else:
   file(lockfile, "w").close()
   atexit.register(lambda:os.remove(lockfile))

//Your code here

On Apr 9, 2005 2:32 PM, Sidharth Kuruvila <sidharth.kuruvila at gmail.com> wrote:
> I haven't tested this. There is probably a better way of doing this
> looking at process information. I use a lock file to mark that the
> program is already running. The problem is that for an abrupt shutdown
> the file might not be removed.
> 
> import atexit
> if os.path.exists(lockfile):
>     print "there is an instance already running"
> else:
>     file(lockfile, "w").close()
>     atexit.register(lambda:os.remove(lockfile))
> 
> //Your code here
> 
> On Apr 9, 2005 2:01 PM, Fabio Pliger <fabio.pliger at siavr.it> wrote:
> > Hi,
> > is it possibile, in python, to check for an already running instance of an
> > application?
> > My problem is that, if my program i running and the user relaunch it, i
> > don't want to open a new instance and have to instances of the same program
> > running togheter...
> > Can someone help me on this?
> > Fabio P.
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> 
> --
> http://blogs.applibase.net/sidharth
> 


-- 
http://blogs.applibase.net/sidharth


From DYHIBB at peoplepc.com  Sun Apr 17 00:25:59 2005
From: DYHIBB at peoplepc.com (Dyhibb)
Date: Sun, 17 Apr 2005 04:25:59 GMT
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven wh
References: <1113707535.383715.327170@g14g2000cwa.googlegroups.com>
Message-ID: <rzl8e.7988$sp3.2080@newsread3.news.atl.earthlink.net>

Yeah, Yeah, but what kind of guitar did he play?

Dear Jesus Christ, I want to be saved so that I can have a home in Heaven
with You
when I die. I agree with You that I am a sinner. I believe that You love me
and want
to save me. I believe that You bled and died on the cross to pay the penalty
for my
sins and that You rose from the dead. Please forgive my sins and come into
my heart and be my Lord and Saviour. Thanks Lord Jesus Christ for forgiving
me and saving me through Your merciful grace.
Amen

Hitler, gun to the head, straight to heaven?

Ghandi, Hindu, straight to Hell for not praying to Jesus?

D'Yancy



<RonGrossi382636 at yahoo.com> wrote in message
news:1113707535.383715.327170 at g14g2000cwa.googlegroups.com...
>
> The reason some people don't know for sure
> if they are going to Heaven when they die
> is because they just don't know.
>
> The good news is that you can know for
> sure that you are going to Heaven which is
> described in the Holy Bible as a beautiful
> place with no death, sorrow, sickness or
> pain.
>
> God tells us in the Holy Bible how simple
> it is to be saved so that we can live
> forever with Him in Heaven.
>
> "For if you confess with your mouth Jesus
> is Lord and believe in your heart that God
> raised Him from the dead, you
> WILL BE SAVED." (Romans 10:9)
>
> Over 2000 years ago God came from Heaven
> to earth in the person of Jesus Christ to
> shed His blood and die on a cross to pay
> our sin debt in full.
>
> Jesus Christ was born in Israel
> supernaturally to a virgin Jewish woman
> named Mary and lived a sinless life for
> thirty-three years.
>
> At the age of thirty-three Jesus was
> scourged and had a crown of thorns pressed
> onto His head then Jesus was crucified.
>
> Three days after Jesus died on a cross and
> was placed in a grave Jesus rose from the
> dead as Jesus said would happen before
> Jesus died.
>
> If someone tells you that they are going
> to die and in three days come back to life
> again and it happens then this person must
> be the real deal.
>
> Jesus Christ is the only person that ever
> lived a perfect sinless life.
>
> This is why Jesus is able to cover our
> sins(misdeeds) with His own blood because
> Jesus is sinless.
>
> The Holy Bible says, "In Him(Jesus) we
> have redemption through His blood, the
> forgiveness of sins..." (Ephesians 1:7)
>
> If you would like God to forgive you of
> your past, present and future sins just
> ask Jesus Christ to be your Lord and
> Saviour.
>
> It doesn't matter how old you are or how
> many bad things that you have done in
> your life including lying and stealing
> all the way up to murder.
>
> Just pray the prayer below with your
> mouth and mean it from your heart and
> God will hear you and save you.
>
> Dear Jesus Christ, I want to be saved so
> that I can have a home in Heaven with You
> when I die. I agree with You that I am a
> sinner. I believe that You love me and want
> to save me. I believe that You bled and
> died on the cross to pay the penalty for my
> sins and that You rose from the dead.
> Please forgive my sins and come into my
> heart and be my Lord and Saviour. Thanks
> Lord Jesus Christ for forgiving me and
> saving me through Your merciful grace.
> Amen.
>
> Welcome to the family of God if you just
> allowed God to save you. Now you are a real
> Christian and you can know for sure that
> you will live in Heaven forever when this
> life comes to an end.
>
> As a child of God we are to avoid
> sin(wrongdoing), but if you do sin the
> Holy Bible says, "My dear children, I
> write this to you so that you will not sin.
> But if anybody does sin, we have one who
> speaks to the Father in our defense Jesus
> Christ, the Righteous One."
>
> Those of you that have not yet decided to
> place your trust in the Lord Jesus Christ
> may never get another chance to do so
> because you do not know when you will die.
>
> Jesus said "I am the way, the truth and
> the life: no one can come to the
> Father(in Heaven), but by me."
> (John 14:6)
>
> This means that if you die without
> trusting in Jesus Christ as your Lord and
> Saviour you will be forever separated from
> the love of God in a place called Hell.
>
> The Holy Bible descibes Hell as a place of
> eternal torment, suffering, pain and agony
> for all those who have rejected Jesus Christ.
>
> The good news is that you can avoid Hell by
> allowing Jesus Christ to save you today.
> Only then will you have true peace in your
> life knowing that no matter what happens you
> are on your way to Heaven.
>
>
> Praise the Lord!
> Servant of the Lord Jesus Christ
> Ronald L. Grossi
>
> *Show this to your family and friends so
> they can know that they have a choice
> where they will spend eternity. Thanks!
>
> ____________________________________________________
>
>
>
> Got Questions?
> http://www.gotquestions.org/archive.html
>
> Other Languages
> http://www.godssimpleplan.org/gsps.html
>
> Free Movie: To Hell and Back
> http://www.tbn.org/index.php/8/1.html
>
> Animation
> http://www.browser.to/jesus-animation
>
> The Passion Of The Christ
> http://www.thepassionofthechrist.com
>
> Beware Of Cults
> http://www.carm.org/cults/cultlist.htm
>
> About Hell
> http://www.equip.org/free/DH198.htm
>
> Is Jesus God?
> http://www.powertochange.com/questions/qna2.html
>
> Free Online Bible
> http://www.bibledatabase.net
>
>
> ____________________________________________________
>




From dave at pythonapocrypha.com  Tue Apr 12 13:31:38 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Tue, 12 Apr 2005 11:31:38 -0600
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <4qec7xl7.fsf@python.net>
References: <425a9869$0$38039$bed64819@news.gradwell.net>	<is2tmhzk.fsf@python.net>	<425aa0fb$0$38041$bed64819@news.gradwell.net>	<425AF2AB.1030401@v.loewis.de>	<425b8948$0$38045$bed64819@news.gradwell.net>	<d3gptd$jni$1@sea.gmane.org>	<mailman.1776.1113323960.1799.python-list@python.org>
	<4qec7xl7.fsf@python.net>
Message-ID: <425C05FA.2030104@pythonapocrypha.com>

Thomas Heller wrote:
> Dave Brueck <dave at pythonapocrypha.com> writes:
>>Terry Reedy wrote:
>>>If there is something about the default install of Python on Windows
>>>that makes it less desireable or less easy than other platforms,
>>>then maybe that can be fixed.  To make installation easier, maybe
>>>someone could write a small .exe that could be frozen with scripts
>>>or run with installers and that would detect the presence/absence of
>>>the needed Python version and offer an auto download and install if
>>>needed.
>>
>>I mostly agree with the sentiment, but it does break down a little in
>>practice. At least currently it does - like you said, this is fixable,
>>but nobody has signed up to fix it yet.
>>
>>The main thing that's needed is a zero-input Python distribution - a
>>Python runtime, if you will - that (1) gets installed to a "good"
>>place (2) does so without asking the user to do anything, (3) can
>>coexist with different versions of the runtime, and (4) is easily
>>detectable by applications wanting to use it.
> 
> 
> The effbot.exe platform (or how it's called) ?

Yep - something along those lines, plus some docs for app developers. I don't 
know if it installs all the stdlib, or just what effbot apps need, but I assume 
the former.

>>One other minor component is a small launcher executable, because on
>>Windows it's non-trivial to find out which "python.exe" in the task
>>manager is running which Python script. Anyway, each app would have a
>>small launcher that bootstraps the actual Python script[1]. (Or, if
>>there's some way to trick the task manager into displaying something
>>besides "python.exe", that'd work too)
> 
> 
> exemaker?

Something similar to that, yes. You'd need an option to generate a console 
launcher or a Windows app launcher (maybe his latest version already has this?), 
and a way to figure out which version of the runtime to use (rather than specify 
the path ahead of time, you'd specify version requirements, and then at runtime 
use registry entries to figure out where that runtime is), but the general idea 
is the same.

-Dave


From hancock at anansispaceworks.com  Mon Apr 25 22:15:13 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Mon, 25 Apr 2005 21:15:13 -0500
Subject: HTML cleaner?
In-Reply-To: <d4h9uv$cge$1@bagan.srce.hr>
References: <d4h9uv$cge$1@bagan.srce.hr>
Message-ID: <200504252115.13085.hancock@anansispaceworks.com>

On Sunday 24 April 2005 06:25 pm, Ivan Voras wrote:
> Is there a HTML clean/tidy library or module written in pure python? I 
> found mxTidy, but it's a interface to command-line tool.
> 
> What I'm searching is something that will accept a list of allowed tags 
> and/or attributes and strip the rest from HTML string.

I'm using stripogram for this. It uses a whitelist approach, where you
tell it what tags to accept. It also has a function for getting text only.

http://www.zope.org/Members/chrisw/StripOGram/

It's very useful in Zope, but is actually an independent pure-python
module (you don't need Zope to use it).  Also very small.

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From steve at holdenweb.com  Mon Apr 18 16:24:39 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 18 Apr 2005 16:24:39 -0400
Subject: Enumerating formatting strings
Message-ID: <d414ps$kd4$1@sea.gmane.org>

I was messing about with formatting and realized that the right kind of 
object could quite easily tell me exactly what accesses are made to the 
mapping in a string % mapping operation. This is a fairly well-known 
technique, modified to tell me what keys would need to be present in any 
mapping used with the format.

class Everything:
     def __init__(self, format="%s", discover=False):
         self.names = {}
         self.values = []
         self.format=format
         self.discover = discover
     def __getitem__(self, key):
         x = self.format % key
         if self.discover:
             self.names[key] = self.names.get(key, 0) + 1
         return x
     def nameList(self):
          if self.names:
              return ["%-20s %d" % i for i in self.names.items()]
          else:
              return self.values
     def __getattr__(self, name):
         print "Attribute", name, "requested"
         return None
     def __repr__(self):
         return "<Everything object at 0x%x>"  % id(self)

def nameCount(template):
     et = Everything(discover=True)
     p = template % et
     nlst = et.nameList()
     nlst.sort()
     return nlst

for s in nameCount("%(name)s %(value)s %(name)s"):
     print s

The result of this effort is:

name                 2
value                1

I've been wondering whether it's possible to perform a similar analysis 
on non-mapping-type format strings, so as to know how long a tuple to 
provide, or whether I'd be forced to lexical analysis of the form string.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From Scott.Daniels at Acm.Org  Thu Apr 21 17:33:55 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Thu, 21 Apr 2005 14:33:55 -0700
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,winzip
 barfs on Python-2.4.1.tar, cannot download bzip2
In-Reply-To: <d47nog$duk$1@sparta.btinternet.com>
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2108.1113922028.1799.python-list@python.org>
	<d45dh8$ppl$1@sparta.btinternet.com> <4266871c$1@nntp0.pdx.net>
	<d47nog$duk$1@sparta.btinternet.com>
Message-ID: <42681686$1@nntp0.pdx.net>

Bill Davy wrote:
> Hi Scott,
> Nice idea.  Tried that but no more information about where the file was 
> (not) found (see below).
> But many thanks for a useful flag.  I did not see them in the documentation. 
> What should I be lkooking for? [StopPres: Ah ha -h why did I not think of 
> that?]

> ...
>>>>import SHIP
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: No module named SHIP
> 
Two common problems here:
1) There is no file *\SHIP.pyd where * is one entry of sys.path
2) The capitalization is not correct.  The file lookup will succeed,
    but then, when "initSHIP(void)" is hunted for in the module, no such
    function will be found.  It is kind of surprising to get the funny
    mix of case-sensitivity and case-insensitivity that results from
    mixing Python and Windows.  By the way, I might not even have it
    right here; I simply make everything as if all tests were case-
    sensitive.

--Scott David Daniels
Scott.Daniels at Acm.Org


From gdamjan at gmail.com  Wed Apr 13 16:28:14 2005
From: gdamjan at gmail.com (Damjan)
Date: Wed, 13 Apr 2005 22:28:14 +0200
Subject: PyChart into web site error
References: <425c0b61$0$10969$5fc30a8@news.tiscali.it>
	<oAW6e.1070$eW7.115@news02.roc.ny>
	<425cc5d0$0$11715$5fc30a8@news.tiscali.it>
Message-ID: <425d81bb@x-privat.org>

>>>AttributeError: 'module' object has no attribute 'argv'
>>>
>>>Why my script doesn't have sys.argv?
...
>> How are you serving the pages?
> 
> Apache 2.0.48, mod_python 3.1.3 and Python 2.3.3
> on my mdk 10.0

Obviosly when using mod_python there's no sys.argv (and what would it
contain if it existed??).

Now the real question is why PyChart needs sys.argv?

OTOH, maybe you can make a dummy sys module in your script that provides
sys.argv??


BTW, I tested with Apache 2.0.53, mod_python 3.1.4 and Python 2.4 to confirm
there's no sys.argv in the mod_python environment.

-- 
damjan


From could.net at gmail.com  Mon Apr  4 22:06:58 2005
From: could.net at gmail.com (could ildg)
Date: Tue, 5 Apr 2005 10:06:58 +0800
Subject: How to merge two binary files into one?
In-Reply-To: <1153pu8pvom6b02@corp.supernews.com>
References: <mailman.1340.1112663541.1799.python-list@python.org>
	<1153pu8pvom6b02@corp.supernews.com>
Message-ID: <311b5ce10504041906452bf886@mail.gmail.com>

Thank you!
Python is really magic, even merge file can use "+".

On Apr 5, 2005 9:20 AM, Grant Edwards <grante at visi.com> wrote:
> On 2005-04-05, could ildg <could.net at gmail.com> wrote:
> 
> > I want to merge file A and file B into a new file C, All of
> > them are binary.
> 
> file('C','wb').write(file('A','rb').read()+file('B','rb').read())
> 
> --
> Grant Edwards                   grante             Yow!  ... or were you
>                                   at               driving the PONTIAC that
>                                visi.com            HONKED at me in MIAMI last
>                                                    Tuesday?
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


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


From rune.strand at gmail.com  Thu Apr 28 10:11:44 2005
From: rune.strand at gmail.com (runes)
Date: 28 Apr 2005 07:11:44 -0700
Subject: Setting win32 console title from Python
In-Reply-To: <Xns964687798F7D0duncanbooth@127.0.0.1>
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
	<Xns964687798F7D0duncanbooth@127.0.0.1>
Message-ID: <1114697504.065001.188900@g14g2000cwa.googlegroups.com>

> Whenever you start an application from the command prompt the title
is
> modified by appending a dash and the name of the program you started.
When
> the application terminates the title is reset (to remove the name of
the
> running program). So any change to the title will only last until the
next
> time CMD.EXE prompts for input. The exception is that any title set
using
> the TITLE command becomes the reset title for that command prompt.

Thanks Duncan!  That sounds reasonable. What I do today is actually
using a .BAT file and read the name from a temp file created by a
python script. It works, but it's slow and the "batchfile-language"
gives me the creep ;-)

I'll try to find out why it does work in command.exe/WConio though.



From http  Fri Apr 15 04:06:00 2005
From: http (Paul Rubin)
Date: 15 Apr 2005 01:06:00 -0700
Subject: A testcase for a Queue like class.
References: <slrnd5urg5.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <7xll7kh3br.fsf@ruckus.brouhaha.com>

Antoon Pardon <apardon at forel.vub.ac.be> writes:
> The tube will have an open method, with as argument an
> access parameter that will determine if the thread wants
> to put things (write) on the queue or will get (read) things
> from the queue (or both). Now what I want is that a thread that
> opens the tube for read access will block until a thread opens
> the same tube for write access.
> 
> The problem is how do I put such a requirement in a test case?

Just open the tube for reading in a separate thread, with something like:

     global done, lock
     done = False
     t = tube.open(self, "r")
     done = True

Then you can tell whether the open is blocked by checking the done
flag.  The test fixture would then open the tube for writing, checking
the flag immediately before and after.  Actually you will need some
synchronization to make sure there's no race condition between "open"
returning and the flag being set.  I'm sure you can figure out how.


From kay.schluehr at gmx.net  Sun Apr 10 04:01:39 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Apr 2005 01:01:39 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <4257BE8B.9080209@v.loewis.de>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<4257BE8B.9080209@v.loewis.de>
Message-ID: <1113120099.217977.192190@g14g2000cwa.googlegroups.com>


Martin v. L?wis wrote:

> Is it good that people write these wrappers?

No.

> I don't think so. Is it
> the library's fault? I don't think so, either. People write these
> wrappers because they cannot remember how to use the library.

I slightly disagree. It's a symptom. The example of the path-module is
instructive because it actually represents path objects not just a
bunch of functions in isolation that manipulate strings that can be
interpreted as paths. I started to read in the lib.py documentation of
pypy and again I found the reference to the path-module. Different
people seem to share similar ideas and claim about inconveniencies. I
use the path-module by myself for a year. This indicates that there is
something wrong or missing in the std-library.  

Regards,
Kay



From Scott.Daniels at Acm.Org  Fri Apr  8 12:18:55 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 09:18:55 -0700
Subject: How to name Exceptions that aren't Errors
In-Reply-To: <tGx5e.441$5I5.30633@newshog.newsread.com>
References: <3blfl8F6gt80jU1@individual.net>
	<mailman.1502.1112902903.1799.python-list@python.org>
	<tGx5e.441$5I5.30633@newshog.newsread.com>
Message-ID: <4256a991$1@nntp0.pdx.net>

Leif K-Brooks wrote:
> Steve Holden wrote:
> 
>> I've even used an exception called Continue to overcome an irksome
>> restriction in the language (you used not to be able to continue a
>> loop from an except clause).
> 
> 
> Out of curiosity, how could you use an exception to do that? I would 
> think you would need to catch it and then use "continue", which wouldn't 
> be possible because of the restriction you were trying to work around in 
> the first place.

Here is a stupid way to calculate a 3-element median:

     class Success(Exception): pass

     def median_if_sorted(x,y,z):
         if x >= y >= z:
             raise Success(y)
     def median(a, b, c):
         try:
             median_if_sorted(a, b, c)
             median_if_sorted(c, b, a)
             median_if_sorted(a, c, b)
             median_if_sorted(c, a, b)
             median_if_sorted(b, a, c)
             median_if_sorted(b, c, a)
         except Success, instance:
             result, = instance.args
             return result
         else:
             raise ValueError, 'Nothing found'

--Scott David Daniels
Scott.Daniels at Acm.Org


From rbt at athop1.ath.vt.edu  Wed Apr 13 09:00:57 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 13 Apr 2005 09:00:57 -0400
Subject: preallocate list
In-Reply-To: <d3j4ds$njr$1@scotsman.ed.ac.uk>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
Message-ID: <d3j569$5tr$1@solaris.cc.vt.edu>

Jim wrote:

> If I have a file with a floating point number on each line, what is the 
> best way of reading them into a list (or other ordered structure)?
> 
> I was iterating with readline and appending to a list but it is taking 
> ages.

Perhaps you should use readlines (notice the s) instead of readline.


From R.Brodie at rl.ac.uk  Tue Apr 12 04:56:11 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 12 Apr 2005 09:56:11 +0100
Subject: variables exist
References: <9622d535.0504110552.1e070e8d@posting.google.com><d3e0jj$93d$1@sea.gmane.org>
	<mailman.1703.1113237192.1799.python-list@python.org>
Message-ID: <d3g2fb$76m$1@blackmamba.itd.rl.ac.uk>


"Brian van den Broek" <bvande at po-box.mcgill.ca> wrote in message
news:mailman.1703.1113237192.1799.python-list at python.org...

> I'm a hobbyist and still learning, but the claim the try/except is
> "lousy Python" surprise me a bit.

I think it wasn't the use of try/except as such. It's more that
if you're the developer you ought to know whether variables
are defined or not. It might be a sign you're using global
variables more often than would be considered good style in
Python.




From roy at panix.com  Fri Apr  1 08:21:25 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 01 Apr 2005 08:21:25 -0500
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
Message-ID: <roy-FBA61C.08212501042005@reader1.panix.com>

Nigel Rowe <rho at see.signature.invalid> wrote:

> Have you seen Grig Gheorghiu's 3 part comparison of unittest, and py.test?
> 
> http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-1-unittest.html
> http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-2-doctest.html
> http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-3-pytest-tool.html

Just finished reading them now.  Thanks for the pointer, they make an 
excellent review of the space.

One thing that worries me a little is that all three seem to have 
advantages and disadvantages, yet none is so obviously better than the 
others that it stands out as the only reasonable way to do it.  This means 
some groups will adopt one, some will adopt another, and the world will 
become fragmented.


From greg at cosc.canterbury.ac.nz  Fri Apr  1 00:01:20 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Fri, 01 Apr 2005 17:01:20 +1200
Subject: itertools to iter transition (WAS: Pre-PEP: Dictionary
 accumulator methods)
In-Reply-To: <t8GdnWcs-9J6AdTfRVn-hw@comcast.com>
References: <_eednaLUwpA2o9XfRVn-vg@comcast.com> <OJ82e.30130$qN3.113@trndny01>
	<du78y46n659.fsf@lehtori.cc.tut.fi>
	<t8GdnWcs-9J6AdTfRVn-hw@comcast.com>
Message-ID: <3b42tdF6bcb60U1@individual.net>

Steven Bethard wrote:
> I'd argue that for the same reasons that 
> dict.fromkeys is a dict classmethod, the itertools methods could be iter 
> classmethods (or staticmethods).  The basic idea being that it's nice to 
> place the methods associated with a type in that type's definiton.  The 
> parallel's a little weaker here because calling iter doesn't always 
> produce objects of type iter:

Indeed, I see iter() as being more like len(), which
is clearly a function, not a constructor. Making iter()
a type and giving it class methods would be strange.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From harold.fellermann at upf.edu  Fri Apr  8 15:37:37 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Fri, 8 Apr 2005 21:37:37 +0200
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36hnj$6h6$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>
Message-ID: <78f6595afdb48aabb9c72dfe549a543e@upf.edu>

> I have read a text file using the command
>
> lines = myfile.readlines()
>
> and now I want to seach those lines for a particular string.  I was 
> hoping there was a way to "find" that string in a similar way as 
> searching simply a simple string.  I want to do something like
>
> lines.find.('my particular string')
>
> Is there a module that already exists that allows me to do this or 
> will I have to created my own method?

file.readlines() returns a list of lines. You can either call find on 
each
element in this list, like:

for line in myfile.readlines() :
     if line.find('my particular string') :
         do_something()

of just read in the whole file, if you are not interested in the 
particular
line, where 'my particular string occurs':

myfile.read().find('my particular string')

Cheers,

- harold -

--
"All unsere Erfindungen sind nichts als verbesserte Mittel
  zu einem nicht verbesserten Zweck."
-- H.D. Thoreau



From todd at digeo.com  Thu Apr 28 15:46:27 2005
From: todd at digeo.com (Todd Krein)
Date: 28 Apr 2005 12:46:27 -0700
Subject: Can't run BLT program more than once?
Message-ID: <1114717587.530634.182170@g14g2000cwa.googlegroups.com>

I'm running activestate Python 2.4 for windows, and the latest BLT,
under XP. I'm using pythonWin as my environment.

When I run my plotting program the first time, it works just fine. If I
exit out (normally), and then run it again from PythonWin, I get the
following error. It's as if something isn't getting properly
re-initialized. If I quit out of PythonWin, and relaunch it, I can run
the program again, once. Any ideas?



Error: 1
TclError Exception in Tk callback
  Function: <bound method PathEval.doOpenTrace of <__main__.PathEval
instance at 0x0127AC60>> (type: <type 'instancemethod'>)
  Args: ()
Traceback (innermost last):
  File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBase.py", line 1747, in
__call__
    None
  File
"C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
line 89, in doOpenTrace
    self.doPlotTrace()                          # go plot the thing
  File
"C:\NBU\perforce\hardware\test\home_survey\data\home_007\raw_data\KitchenToDen\AMPLITUDE\PathEval.py",
line 117, in doPlotTrace
    self.graph = Pmw.Blt.Graph(tkRoot)                   # make a new
graph area
  File "C:\Python24\lib\Pmw\Pmw_1_2\lib\PmwBlt.py", line 260, in
__init__
    None
  File "C:\Python24\lib\lib-tk\Tkinter.py", line 1861, in __init__
    self.tk.call(
TclError: invalid command name "::blt::graph"



From philippe at philippecmartin.com  Thu Apr 14 18:02:18 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Thu, 14 Apr 2005 22:02:18 GMT
Subject: Using python from a browser
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<425eca46$0$865$636a15ce@news.free.fr>
Message-ID: <KLB7e.1128$JJ2.131@newssvr12.news.prodigy.com>

Hi,

>> What do  you mean ? Is  that a client-side or server-side script ?

Client side


>>Where ?
Programming Python - O'Reilly - 2nd edition - by Mark Lutz - Paragraph
"Teaching IE about Python" - Pages 922-925

Regards,

Philippe



From peter at engcorp.com  Mon Apr 11 10:04:36 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 11 Apr 2005 10:04:36 -0400
Subject: change extensions
In-Reply-To: <h8ac51h8qv096ccg36mv3rb0ulivib36de@4ax.com>
References: <4251cef9@dnews.tpgi.com.au>
	<h8ac51h8qv096ccg36mv3rb0ulivib36de@4ax.com>
Message-ID: <H_GdnV2etZdwHsffRVn-og@powergate.ca>

Tim Roberts wrote:
> "Bob Then" <bob_then at yahoo.com.au> wrote:
>>how can i change all files from one extension to another within a direcory?
> 
> In Windows, the quickest way is:
> 
>     os.system( "rename *.old *.new" )

I have a vague memory that this won't work on
all versions of Windows... possibly it isn't
supported on Win98?  That may not be quite right,
but I recall problems doing this in the past.
(Or was it just DOS that failed?)

-Peter


From jdhunter at ace.bsd.uchicago.edu  Wed Apr 27 21:56:07 2005
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Wed, 27 Apr 2005 20:56:07 -0500
Subject: Is there a better interactive plotter then pylab?
In-Reply-To: <JzWbe.658796$w62.18013@bgtnsc05-news.ops.worldnet.att.net>
	(Charles Krug's message of "Thu, 28 Apr 2005 00:59:21 GMT")
References: <JzWbe.658796$w62.18013@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <87sm1boea0.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Charles" == Charles Krug <cdkrug at worldnet.att.net> writes:

    Charles> List: I'm trying to us pylab to see what I'm doing with
    Charles> some DSP algorithms, in case my posts about convolution
    Charles> and ffts weren't giving it away.

    Charles> I've been using pylab's plot function, but I'm finding it
    Charles> a bit cumbersome.

    Charles> It works, but if I switch from the interactive window to
    Charles> the plot window and back, the plot window gets trashed.

    Charles> Is there a better alternative for interactive use?

You are probably not using pylab interactive mode properly.
matplotlib has several GUI backends (gtk, tk, qt, etc...).  Most GUIs
take control with their mainloop and prevent further interaction.
>From what you describe, I'm pretty sure you haven't setup your
configuration properly for interactive use.  Fortunately, there are a
couple of solutions.

For the standard python shell, you need to use the TkAgg backend.
Tkinter is the only python GUI that plays nicely with the standard
python shell.  You will need to set "backend : TkAgg" and 
"interactive : True" in the matplotlib rc file.  See
http://matplotlib.sf.net/interactive.html for details and
http://matplotlib.sf.net/.matplotlibrc for information on the
configuration file.

If you want to use another GUI backend, eg GTKAgg (the default on
linux and also the fastest backend), you need to use a custom python
interpreter which runs the GUI in a thread.  The best choice here is
to use ipython (http://ipython.scipy.org) with the -pylab option.
ipython is aware of matplotlib and its rc file, and will read the rc
file, set the interactive mode, detect the GUI backend, and make the
proper threading calls.  Basically it *just works*.  If you are on
linux, it's an easy install (sudo python setup.py install).  On
windows it's a bit harder, and you may want to look at the 1069
release candidate of enthought python at
http://www.enthought.com/downloads/downloads.htm#download, which comes
with ipython and matplotlib and lots of other goodies.  Again, you'll
need to start ipythhon with

  > ipython -pylab

In addition to the links above, see also
http://matplotlib.sf.net/faq.html#SHOW.

Hope this helps,
JDH


From francois.lepoutre at caramail.com  Mon Apr 18 04:13:18 2005
From: francois.lepoutre at caramail.com (Francois Lepoutre)
Date: Mon, 18 Apr 2005 10:13:18 +0200
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <1113779479.783895.283580@g14g2000cwa.googlegroups.com>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>
	<42603197.9090002@egenix.com>
	<mailman.1988.1113604089.1799.python-list@python.org>
	<4260ff70$0$7511$79c14f64@nan-newsreader-07.noos.net>
	<1113779479.783895.283580@g14g2000cwa.googlegroups.com>
Message-ID: <4263688b$0$23329$79c14f64@nan-newsreader-05.noos.net>

Hi Peter

> Running your benchmark, I ran into a couple of interesting points.
> Using mx.ODBC, my times were 0.54 seconds and 6.56 seconds
> respectively, while using adodbapi my results are 3.55 seconds and 25.9
> seconds respectively.  mx.ODBC is faster with the simple query you
> provide.

We agree on figures at this stage :)

> Next I modified the benchmark to reflect my particular circumstances
> more accurately [...] reduce the number of iterations from 100
> to 10.  Since there are 128000 records in the main table, the wait for
> 100 iterations was too long for my patience.  Under these
> circumstances, mx.ODBC's numbers are 188.49 seconds and 377.56 seconds
> respectively, and adodbapi's times are 111.15 seconds and 223.55
> seconds respectively.

This is an interesting feedback. It looks like both middleware have
their distinct value and distinct set of advantages.

I'll definitely review my judgment on ADO!

> My first wall-clock impressions are obvious exaggerations of reality,
> for which I duly apologize to all.  However, adodbapi did prove to be
> faster in my admittedly very wacky common use case.  Slower to connect,
> but faster to run a substantial query.

> Comments?  Questions?  Suggestions for improvement?

Based on your results, my feeling is that mx.ODBC remains a solution
of choice for db-support behing web services "? la mod_python"
where connection time is essential whilst adodbapi would be the
definite winner when it comes to typical db-intensive win32-based
applications (such as wxpython-based ones).

Regards to you

Francois



From ivanlan at pauahtun.org  Sun Apr 24 13:48:03 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Sun, 24 Apr 2005 11:48:03 -0600
Subject: Rudeness on this list [Re: rudeness was: Python licence again]
References: <mailman.2308.1114200498.1799.python-list@python.org>
	<d4fte8$sa1$1@gemini.csx.cam.ac.uk>
	<20050424135926.GA24384@phenix.progiciels-bpi.ca>
	<200504241026.42684.jstroud@mbi.ucla.edu>
Message-ID: <426BDBD3.3C116866@pauahtun.org>

Hi All--

James Stroud wrote:
> 
> On Sunday 24 April 2005 06:59 am, so sayeth Fran?ois Pinard:
> > As seen from here, the Python mailing list quality has been degrading
> > significantly for the last half-year or so.
> 
> That's funny. That's exactly as long as I've been on this list. I wonder if
> the correlation is causal?
>

Nope.  I've been MIA 4 years, and the only difference I can see between
now and four years ago is that Tim, Guido, Barry & a couple of others
aren't here or don't participate very much.  It was a pretty nice list
then, it's a pretty nice list now, so I'm afraid I must disagree with
Fran?ois.

Oh, and Gordon.  Don't see Gordon around.  Where's he?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From simon.brunning at gmail.com  Wed Apr  6 05:08:39 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 6 Apr 2005 10:08:39 +0100
Subject: Does IronPython indicate MS interest in dynamic languages?
In-Reply-To: <d2vo7h$ca5$1@sea.gmane.org>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
	<mailman.1408.1112743462.1799.python-list@python.org>
	<fnqbi2-p9c.ln1@lairds.us> <yIadneprl6oqxc7fRVn-gw@wideopenwest.com>
	<d2vo7h$ca5$1@sea.gmane.org>
Message-ID: <8c7f10c60504060208681174b@mail.gmail.com>

On Apr 6, 2005 5:25 AM, Mike Rovner <mrovner at propel.com> wrote:
> Sun abandoned dynamic approach (Tcl) in favor of Java.

Sun appear to be very interested in dynamic languages these days:
http://www.tbray.org/ongoing/When/200x/2004/12/08/DynamicJava

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From brian at brianandkate.com  Tue Apr  5 08:52:46 2005
From: brian at brianandkate.com (Brian Blazer)
Date: Tue, 05 Apr 2005 12:52:46 GMT
Subject: playing with pyGoogle - strange codec error
References: <d2u0gc$piv$1@blackmamba.itd.rl.ac.uk>
Message-ID: <2005040507524616807%brian@brianandkatecom>

On 2005-04-05 07:32:12 -0500, "Richard Brodie" <R.Brodie at rl.ac.uk> said:

> 
> "Brian Blazer" <brian at brianandkate.com> wrote in message
> news:2005040410062316807%brian at brianandkatecom...
> 
>> Everything works fine until I get to r.snippet.  Here is the error:
>> 
>> UnicodeEncodeError: 'ascii' codec can't encode character '\ua9' in
>> position 119: ordinal not in range(128)
> 
> You have a character there (the copyright sign) that isn't in the ASCII
> set. If you have anything other than plain ASCII, you need to consider
> encoding. This reference might help:
> 
> http://diveintopython.org/xml_processing/unicode.html

Thank you.  That is a great reference.

Brian

-- 
Nail a post to the Spalted Board. Free WW'ing software and forums.  
Regular freebies! http://www.spaltedboard.com



From davecook at nowhere.net  Fri Apr 15 22:16:29 2005
From: davecook at nowhere.net (Dave Cook)
Date: Sat, 16 Apr 2005 02:16:29 GMT
Subject: Glade for Windows and Python
References: <Pr2dnYstzcxopv3fRVn-oQ@bright.net>
Message-ID: <slrnd60tbt.6oi.davecook@localhost.localdomain>

On 2005-04-15, Richard Lyons <snoylr at cheqnet.net> wrote:

> Has anyone been successful in using Glade for Windows with Python?

Yes, it works fine.

http://gladewin32.sourceforge.net/
http://www.pcpm.ucl.ac.be/~gustin/win32_ports/

Dave Cook


From fredrik at pythonware.com  Wed Apr 27 06:48:55 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 27 Apr 2005 12:48:55 +0200
Subject: Doubt regarding python Compilation
References: <20050427103903.65602.qmail@web8403.mail.in.yahoo.com>
Message-ID: <d4nqcl$urj$1@sea.gmane.org>

"praba kar" <prabapython at yahoo.co.in> wrote:

>       I have doubt regarding python Compilation.

you sure have a lot of doubts.

> I want to know whether Python is compiler language
> or interpreted language.  If Python is interpreter
> language why compilation is there.

the CPython implementation of Python runs on a virtual machine (similar to Java),
and the compilation process converts your code to instructions for that machine
(so-called bytecodes).

Python never "interprets" your code; it's always compiled to bytecode before being
executed (this also applies to the interactive promt, which compiles each statement
before running it).

</F> 





From vze4rx4y at verizon.net  Fri Apr  1 01:04:53 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 01 Apr 2005 06:04:53 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
Message-ID: <9w53e.1031$7b.851@trndny01>

[Roy Smith]
> I've used the standard unittest (pyunit) module on a few projects in the
> past and have always thought it basicly worked fine but was just a little
> too complicated for what it did.
>
> I'm starting a new project now and I'm thinking of trying py.test
> (http://codespeak.net/py/current/doc/test.html).  It looks pretty cool from
> the docs.  Is there anybody out there who has used both packages and can
> give a comparative review?

I've used both and found py.test to be effortless and much less verbose.
For more complex testing strategies, py.test is also a winner.  The generative
tests are easier to write than crafting a similar strategy for unittest.

py.test does not currently integrate well with doctest; however, that will
likely
be the next feature to be added (per holger's talk at PyCon).

For output, unittest's TextTestRunner produces good looking, succinct output
on successful tests.  For failed tests, it is not bad either.  In contrast,
py.test
output is more highly formatted and voluminous -- it takes a while to get used
to.

unittest users have to adapt to the internal structure of the unittest module
and
become familiar with its class structure (test fixture, test case, test suite,
and test
runner objects).  py.test does a good job of hiding its implementation.

py.test is relatively new and is continuing to evolve.  Support tools like a
GUI test runner are just emerging.  In contrast, unittest is based on a proven
model and the code is mature.

unittest module updates come up in distinct releases, often months or years
apart.  py.test is subject to constant update by subversion.  Personally, I like
the continuous updates, but it could be unsettling if you're depending on it
for production code.


Raymond Hettinger





From Pierre_Rouleau at impathnetworks.com  Mon Apr 25 09:31:45 2005
From: Pierre_Rouleau at impathnetworks.com (Pierre Rouleau)
Date: Mon, 25 Apr 2005 09:31:45 -0400
Subject: Why is Python not supporting full derivation of built-in file
 class?
In-Reply-To: <mailman.2404.1114361670.1799.python-list@python.org>
References: <b8zae.11591$9G.927404@news20.bellglobal.com>
	<mailman.2404.1114361670.1799.python-list@python.org>
Message-ID: <3j6be.1675$gA5.184585@news20.bellglobal.com>

Jeff Epler wrote:

> This issue was discussed in another recent python-list thread, called
> "Writing to stdout and a log file".
> 
> My second post includes a patch to Python's "fileobject.c" that made the
> code that started that thread work, but for reasons I mentioned in that
> post I didn't want to push for inclusion of my patch.  I didn't check,
> but it will probably allow your code to work too.
> 
> If you feel differently, then the thing to do is probably to submit the
> patch plus a test case to the sf.net patch tracker for python
> (sf.net/projects/python, click on "patches".  you'll need a sourceforge
> account to submit the patch)
> 
> Jeff
> PS I did allow the Python test suite to run to completion after I wrote
> that message.  It didn't produce any failures or unexpected skips on my
> platform.

Thanks.  I never got involved in Python development before, so I will 
take a look at the development process.  I took a quick look at the 
affected C files and must confess that I need more time looking at them 
to learn everything around it. However, I think that the behaviour of 
file handling should change so that any class derived from file should 
support the >> operator 'properly' (ie the derived class write() method 
should be called).

Pierre


From deetsNOSPAM at web.de  Sat Apr 16 07:41:35 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 16 Apr 2005 13:41:35 +0200
Subject: pythonic use of properties?
References: <mailman.1946.1113534329.1799.python-list@python.org>
Message-ID: <d3qtle$bjr$04$1@news.t-online.com>

> 
> Even though "tens", "ones" and "number" all appear as attributes, only
> "number" has its input validated.  Since the class is designed to only
> hold numbers 0 - 99, one can 'break' it by setting self.tens=11, for
> example.  Should tens and ones be made into full-fledged properties
> and validated?  Should number have no validation?  Is it more pythonic
> to encapsulate tightly, or rely on "responsible use."

You could make them double-underscored attributes. That creates some
name-mangling that prevents accidential access. But as there is no real
private concept in python (and java and C++ protection can be easily
overcome), it is considered pythonic to rely on responsible use.  If a
design for abuse-protection is the ultimate goal, the common suggestion is
to use IPC mechanisms to prevent in-process sharing of data and code -
that's the only real way to go, regardless of the used language.

-- 
Regards,

Diez B. Roggisch


From bokr at oz.net  Wed Apr 20 06:43:29 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 10:43:29 GMT
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
	<3cm9r2F6nif67U1@individual.net>
	<d44vgg$jmr$04$1@news.t-online.com> <42660fc2.42093557@news.oz.net>
	<d455oo$7et$02$1@news.t-online.com>
Message-ID: <42662dc9.49780670@news.oz.net>

On Wed, 20 Apr 2005 11:01:28 +0200, Peter Otten <__peter__ at web.de> wrote:

>Bengt Richter wrote:
>
>> Parse might be a big word for
>> 
>>  >> def tupreq(fmt): return sum(map(lambda s:list(s).count('%'),
>>  >> fmt.split('%%')))
>>  ..
>>  >> tupreq('%s this %(x)s not %% but %s')
>> 
>> (if it works in general ;-)
>
>Which it doesn't:
   D'oh. (My subconscious knew that one, and prompted the "if" ;-)
>
>>>> def tupreq(fmt): return sum(map(lambda s:list(s).count('%'),
>fmt.split('%%')))
>...
>>>> fmt = "%*d"
>>>> fmt % ((1,) * tupreq(fmt))
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>TypeError: not enough arguments for format string
>
But that one it totally spaced on ;-/

>> Or maybe clearer and faster:
>> 
>>  >>> def tupreq(fmt): return sum(1 for c in fmt.replace('%%','') if
>>  >>> c=='%')
>>  ...
>>  >>> tupreq('%s this %(x)s not %% but %s')
>>  3
>

>Mixed formats show some "interesting" behaviour:
>
>>>> "%s %(x)s" % (1,2)
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>TypeError: format requires a mapping
>>>> class D:
>...     def __getitem__(self, key):
>...             return "D[%s]" % key
>...
>>>> "%s %(x)s" % D()
>'<__main__.D instance at 0x402aaf2c> D[x]'
>>>> "%s %(x)s %s" % D()
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>TypeError: not enough arguments for format string
>>>> "%s %(x)s %(y)s" % D()
>'<__main__.D instance at 0x402aad8c> D[x] D[y]'
>
>That is as far as I got. So under what circumstances is 
>'%s this %(x)s not %% but %s' a valid format string?
>
Yeah, I got that far too, some time ago playing % mapping, and
I thought they just didn't allow for mixed formats. My thought then
was that they could pass integer positional keys to another method
(say __format__) on a mapping object that wants to handle mixed formats.
If you wanted the normal str or repr resprensentation of a mapping
object that had a __format__ method, you'd have to do it on the args
side with str(theobject), but you'd have a way. And normal mapping objects
would need no special handling for "%s' in a mixed format context.

Regards,
Bengt Richter


From dwyoon at purunSPAMinfo.co.kr  Thu Apr 14 09:29:25 2005
From: dwyoon at purunSPAMinfo.co.kr (Daewon YOON)
Date: Thu, 14 Apr 2005 22:29:25 +0900
Subject: PIL pilfont.py
Message-ID: <d3lqo4$k7d$1@news.kreonet.re.kr>

Hi.

I tried to convert a bdf file using pilfont.py script. Instead producing
pretty font images, it complained like following.

**
daewian:~/fonting$ ./pilfont.py gulim24.bdf
gulim24.bdf...
Traceback (most recent call last):
  File "./pilfont.py", line 47, in ?
    p.save(f)
  File "/usr/lib/python2.3/site-packages/PIL/FontFile.py", line 105, in
save1
    self.bitmap.save(os.path.splitext(filename)[0] + ".pbm", "PNG")
AttributeError: 'NoneType' object has no attribute 'save'
**

Gulim is a korean font with KSX encoding.
The script worked fine with a ntimb08.bdf. So I suspect the script
doesn't like non-latin
characters.

Can anybody help me?

BTW, my previous problem with truetype() was solved. Some ttf files work and
others don't.

--
zooy


From Serge.Orlov at gmail.com  Sun Apr  3 05:32:50 2005
From: Serge.Orlov at gmail.com (Serge Orlov)
Date: Sun, 3 Apr 2005 09:32:50 +0000 (UTC)
Subject: the bugs that try men's souls
References: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>
Message-ID: <d2od82$a98$1@news.comcor-tv.ru>

Sean McIlroy wrote:
> This needs some background so bear with me.
>
> The problem: Suppose p is a permutation on {0...n} and t is the
> transposition that switches x and y [x,y in {0...n}]. A "stepup pair"
> (just a term I invented) for p is a pair (a,b) of integers in {0...n}
> with a<b. A stepup pair (a,b) for p is an "inversion" (standard term)
> of p iff (p(a),p(b)) is NOT a stepup pair. Now, if {a,b}={x,y}, then
> clearly (a,b) is an inversion of p iff it is NOT an inversion of pt
> (functional composition). Also, if {a,b} and {x,y} are disjoint, then
> (a,b) is an inversion of p iff it is an inversion of pt. The remaining
> cases are the ones where {a,b} and {x,y} have a single element in
> common, and of these, there are exactly as many inversions of p as
> there are of pt, though in general it is not the same set of stepup
> pairs for each function.
>
> The code below represents my attempt to apply python toward getting
> insight into why the number of inversions, with exactly one coordinate
> in {x,y}, is the same for p and pt. The problem with the code is that
> if, at the relevant line ("MYSTERIOUSLY BROKEN"), I use the
> commented-out expression instead of the expression that's actually
> there, then in some cases the script gives a DIFFERENT ANSWER to the
> question whether a given pair is or is not an inversion of p
> respectively pt.

[snip the code]

Can you post a unit test that fails? Otherwise it's not clear what you mean
by saying "mysteriously broken" and "different answer".

  Serge.




From gandalf at geochemsource.com  Tue Apr 12 09:41:46 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Tue, 12 Apr 2005 15:41:46 +0200
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113311618.838281.205380@l41g2000cwc.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>	<op.so37qgvcqfv3if@localhost>
	<1113311618.838281.205380@l41g2000cwc.googlegroups.com>
Message-ID: <425BD01A.3090407@geochemsource.com>


  Hello,

I have some answers but for some of your questions, there are many 
(possibly good) answers.

>1)Can i build web applications in Python ? If so how. I am planning to
>build a web application for intranet use which deals with workflow of
>Internal office communication.
>  
>
I believe you want something that is more just a mailing list. There are 
at least 4 different solutions for creating web sites with Python.
Here are some:

  Plone  (www.plone.org)
  Zope  (Plone is build with Zope)
  mod_python

Depends on what you need and how much time you have to do it.

>2)Which is best opensource database to be used with Python ?
>  
>

Under Windows platform, I would like to recommend PostgreSQL 8 - fast 
enough, it has many data types, procedural languages, triggers, 
contributed extensions. Supports nested transactions, deferrable 
constraints etc. For small applications, it can be too heavy.
For smaller, simple applications you can consider FireBird. It is more 
simple and lightweight.
I also tried SAP-DB before. I cannot tell too much about SAP but it 
looked promising.
I do not recommend MySQL. If you really want to take advantage of the 
modern concepts of today's database systems, you will notice that MySQL 
is not standard enough and usually you will find something that you 
cannot do with it. (Otherwise MySQL is very popular.)

You can also try other "object persistence" systems. (For example, ZODB 
) They are not relational databases but they can be good for you.

>3)When i write a remote execution script in python is it required that
>python should be installed in remote system.
>  
>
I'm not sure what it means. Are you talking about RPC? You can write COM 
servers using Python. Does this answer your question?

>4)I heard about Perl/CGI and that CGI application done by python
>too.....Is CGI still valid when PHP has taken over the WebApplication
>Development, Dominating.
>  
>
CGI is still valid but nobody will recommend it to you. It is obsolete. 
You should better use a templating or content management system. For 
bigger sites, you can use a better web application server like Zope, 
make the programming part at lower level. It requires more knowledge but 
gives you virtually infinite number of possiblilites.

>Sorry if these questions are out of this group , but answers to these ?
>will help me a lot.
>  
>
It seems to me that you have interests in various fields but it looks 
you did not search on the internet.
For example, if you search for "web development Python wiki" on google 
then you will get this link
on the first page:

http://www.fredshack.com/docs/pythonweb.html

I can't believe that you tried to get information from search engines. 
Please do not ask this list to dig the information for you.
Search on the internet first. Use Python Wiki. Read the articles, read 
at least the front pages of the tools found. Compare them yourself.
Then if you still need to choose between two but you cannot decide wich 
one to use - you can come back and ask others what is their experience.

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From mahs at telcopartners.com  Wed Apr 27 18:54:54 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 27 Apr 2005 15:54:54 -0700
Subject: creating very small types
In-Reply-To: <427012B4.7090604@gmail.com>
References: <mailman.2599.1114633031.1799.python-list@python.org>	<pan.2005.04.27.21.46.20.199466@jerf.org>
	<427012B4.7090604@gmail.com>
Message-ID: <d4p4sn$rmp$1@sea.gmane.org>

andrea wrote:
>>>I was thinking to code the huffman algorithm and trying to compress
>>>something with it, but I've got a problem.
>>>How can I represent for example a char with only 3 bits??

>>>I had a look to the compression modules but I can't understand them much...
...
> I understand I can't do it easily in python, but maybe I could define a
> new type in C and use it to do those dirty works, what do you think?

Why do you need to create 'very small types'?

You only need actual bit-twiddling when you do the encoding/de-coding right?
If you create an encoding map 'codes' as a dict of strings of '1' and '0', 
encoding might look like (untested):


     def encode(stream):
         outchar = count = 0
         for char in stream:
             for bit in codes[char]:
                 (outchar << 1) | (bit == "1")
                 count +=1
                 if count ==8:
                     yield chr(outchar)
                     outchar = count = 0
         if count:
             yield chr(outchar)


HTH
Michael



From peter at engcorp.com  Fri Apr  1 19:36:50 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 01 Apr 2005 19:36:50 -0500
Subject: unittest vs py.test?
In-Reply-To: <%Fl3e.1804$7b.990@trndny01>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
Message-ID: <_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>

Raymond Hettinger wrote:
> BTW, the above code simplifies to:
> 
> from py.test import raises
> assert a == b
> raises(Error, func, args)

This is pretty, but I *want* my tests to be contained
in separate functions or methods.  The trivial amount
of extra overhead that unittest requires fits with
the way I want to write my tests, so it basically
represents zero overhead for me.

The above doesn't look like it would scale very
well to many tests in terms of maintaining some
semblance of structure and readability.

And once you add some functions or whatever to do
that, I'm still unclear on how the one or two lines
of extra code that unittest requires represents
an amount of code that really merits the label "heavy".

As for Roy's comments: I use a small internally
developed driver script which uses os.walk to find
all the files matching tests/*_unit.py or tests/story*.py
in all subfolders of the project, and which runs them
in separate processes to ensure none can pollute
the environment in which other tests run.  I can
dispense with the unittest.main() call, but I like
to be able to run the tests standalone.  I guess
with py.test I couldn't do that...

If py.test provides a driver utility that does
effectively this, well, that's nice for users.  If
it doesn't run them as separate processes, it wouldn't
suit me anyway.

Still, it sounds like it does have a strong following
of smart people: enough to make me want to take a
closer look at it to see what the fuss is about. :-)

-Peter


From zsolt-googleP6463 at mailblocks.com  Thu Apr 21 12:24:29 2005
From: zsolt-googleP6463 at mailblocks.com (pythonUser_07)
Date: 21 Apr 2005 09:24:29 -0700
Subject: goto statement
In-Reply-To: <42666097.3040405@i.com.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
Message-ID: <1114100669.807737.192320@l41g2000cwc.googlegroups.com>

Hi,

Have you tried the triple quote comment technique?

I am assuming you want to skip some code for the time being.

Here is an example

print "hello world"
''' COMMENT OUT FOR NOW
someFunction()
someOtherFunction()
'''
print "goodbye world"

This means that you have only two locations to remove the blocked out
code.  This is identical to having to remove the goto statement and the
marker.

Hope that helps.



From tzot at sil-tec.gr  Wed Apr 20 11:06:02 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 18:06:02 +0300
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
Message-ID: <dsrc61d1tmeelasa5r7qpefprjk1ssdma3@4ax.com>

On Wed, 20 Apr 2005 14:58:35 +0300, rumours say that Maxim Kasimov
<kasimov at i.com.ua> might have written:

>>> if you need to comment a couple of code (and then uncomment ), what 
>>> are you doing then?
 
>> Use comments?
 
>WOW, just greate! ... but i'd like to relax at some more interesting way than to comment each of rows

What editor exactly are you using that can't un/indent and un/comment a
block of lines?  Obviously, neither vi, nor emacs, nor idle.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From prabapython at yahoo.co.in  Sat Apr 16 10:28:27 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Sat, 16 Apr 2005 15:28:27 +0100 (BST)
Subject: trouble to print array contents using slice operator
In-Reply-To: 6667
Message-ID: <20050416142828.37320.qmail@web8401.mail.in.yahoo.com>

Dear all,

   In Php array_slice function base
we can print array contents as per our desire
eg)

$a = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
$arr = array_slice($a,10,10);

this function will print 11,12,13,14,15

But I try to print the same thing in python
using slice operator 

eg) print a[10:10] 

This statement print [] empty array.  

How I need to get my desired output like php
array_slice function?

with regards
Prabahar



 

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From photos at conversent.net  Fri Apr 29 18:37:13 2005
From: photos at conversent.net (Dave Rose)
Date: Fri, 29 Apr 2005 22:37:13 +0000 (UTC)
Subject: I forgot to wind up my example .... ; (
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
	<d4u61g$in9$1@sea.gmane.org>
Message-ID: <loom.20050430T003455-567@post.gmane.org>

So, I forgot the last part of my example that might gel in your mind why 
Objects are useful in certain situations.  Ok so you maybe followed my example 
of the shopping cart.  Let's just forget for a moment the use for shopping 
carts is for  websites.  Let's just say you were going to write the lines 
directly into Python, like maybe at the IDLE interpreter.  Like maybe you're 
testing the functionality of the routine for correctness, not actual 
implementation.

You have a ShoppingCartClass(), and three users-> Dave, Tommy, Bryan.
ShoppngCartClass() has 3 methods:
.AddItem()
.RemoveItem()
.CheckOut()

These are really just 'def' routintes you write in the class to do some action 
or calculation.  Here, we want to either add an item to 'the cart', remove 
one, or finalize the order. 

In the interpreter,  you could do this. Define 3 users of the 
ShoppingCartClass.

Dave = ShoppingCartClass()
Tommy = ShoppingCartClass()
Bryan = ShoppingCartClass()


Ok.  Now you could do different things to each:

Dave.AddItem(sku=5)
Tommy.AddItem(sku=77)
Tommy.AddItem(sku=12)
Tommy.RemoveItem(sku=12)
Dave.CheckOut(state=CT, ccard='visa', ccardnum='1234-5678-8765-431')
Tommy.CheckOut(stsate=RI, ccard='mastercard', ccardnum='431-123-4321-1234')
Bryan.CancelOrder()

so, if you were then to take account of what you had, you'd know:
Dave has item SKU=5
Tommy has item SKU=77
Bryan has his order cancelled.

This is still very hard-coded.  You could abstract, or maybe variablize, 
things more. Let's try:

You can mix classes with say dictionaries, to make their use in routines more 
beneficial.

So, you could have:

user = ?Dave?
ShoppingCart={}
ShoppingCart[user] = ShoppingCartClass()
user = ?Tommy?
ShoppingCart[user] = ShoppingCartClass()
user = ?Dave?
ShoppingCart[user].AddItem(sku=55)
user = ?Tommy?
ShoppingCart[user].CheckOut( ... )
ShoppingCart[?Dave?].CheckOut( ... )

Putting the classes in the dictionary allow you to use names from things like 
fields, config files, text files, TextControls in my favorite program 
wxPython, etc.

If you can wrap your mind around this, you're well on your way to using OOP I 
believe.  If not, , don't give up. I'm just a python/programming newbie and 
maybe missed the boat completely with my posting.

-Dave 



From gsakkis at rutgers.edu  Tue Apr 19 16:20:49 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 19 Apr 2005 13:20:49 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<mailman.2066.1113863546.1799.python-list@python.org>
	<1113898210.973052.255840@l41g2000cwc.googlegroups.com>
	<mailman.2102.1113918923.1799.python-list@python.org>
	<1113932491.072447.146420@o13g2000cwo.googlegroups.com>
	<mailman.2124.1113935783.1799.python-list@python.org>
Message-ID: <1113942049.273369.18660@o13g2000cwo.googlegroups.com>

"Fran?ois Pinard" wrote:
> > > keywords may be abbreviated, and much more hairy,
>
> > Hmm.. -1 on this. It may save a few keystrokes, but it's not good
for
> > readability and maintenability.
>
> That was my first impression too.  Yet, interactively, I found that
> feature very convenient.  Already with Python, I use shortcuts
> interactively that I would not write nor keep in real, saved,
permanent
> programs.  And for very common functions and features, which are not
> really fluctuating anymore, some abbreviations became well known
idioms.

Yes, interactive use can be very different from saved modules to be
used, read and modified in the future. However if such a feature is
part of the language, it is up to the programmer's experience and
responsibility to use it only interactively. As for interactive
shortcuts, I've been using IPython for some months now as my standard
interpreter; with features such as tab completion, logged history,
'macros' and integration with the shell, shortcuts are everywhere ! Tab
completion does not work for named function arguments yet, but it
should be possible with introspection.

George



From peufeu at free.fr  Mon Apr 11 17:10:42 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Mon, 11 Apr 2005 23:10:42 +0200
Subject: The convenient database engine for a "Distributed" System
References: <1113253060.465083.110780@f14g2000cwb.googlegroups.com>
Message-ID: <op.so26f4jjqfv3if@localhost>



	I've not used it personnally, but I heard good things about it :

"Firebird is a relational database offering many ANSI SQL-99 features that  
runs on Linux, Windows, and a variety of Unix platforms. Firebird offers  
excellent concurrency, high performance, and powerful language support for  
stored procedures and triggers. It has been used in production systems,  
under a variety of names since 1981.

Firebird is a commercially independent project of C and C++ programmers,  
technical advisors and supporters developing and enhancing a  
multi-platform relational database management system based on the source  
code released by Inprise Corp (now known as Borland Software Corp) on 25  
July, 2000 under the InterBase Public License v.1.0.

Firebird is completely free of any registration, licensing or deployment  
fees. It may be deployed freely for use with any third-party software,  
whether commercial or not.."

	These seems to be an embedded version so that you can embed the library  
in your app and make everything nice and monolithic.

	


From lee at example.com  Wed Apr 13 16:10:37 2005
From: lee at example.com (Lee Harr)
Date: Wed, 13 Apr 2005 20:10:37 GMT
Subject: PyChart into web site error
References: <425c0b61$0$10969$5fc30a8@news.tiscali.it>
	<oAW6e.1070$eW7.115@news02.roc.ny>
	<425cc5d0$0$11715$5fc30a8@news.tiscali.it>
Message-ID: <11f7e.1152$AI.370@news02.roc.ny>

On 2005-04-13, Michele Petrazzo <michele.petrazzo at TOGLIunipex.it> wrote:
> Lee Harr wrote:
>> On 2005-04-12, Michele Petrazzo <michele.petrazzo at TOGLIunipex.it> wrote:
>> 
>>>I'm using PyChart like a module for create charts into a little web
>>>site, but when I try to create one, I have this error:
>>>
>>>/var/www/html/lgt/draw.py:19, in draw:
>>>can = canvas.init(self.file_name)
>>>/usr/lib/python2.3/site-packages/pychart/canvas.py:60, in init:
>>>can = pngcanvas.T(fname)
>>>/usr/lib/python2.3/site-packages/pychart/pscanvas.py:25, in __init__:
>>>basecanvas.T.__init__(self)
>>>/usr/lib/python2.3/site-packages/pychart/basecanvas.py:70, in __init__:
>>>self.title = re.sub("(.*)\\.py$", "\\1", sys.argv[0])
>>>
>>>AttributeError: 'module' object has no attribute 'argv'
>>>
>>>Why my script doesn't have sys.argv?
>>>
>>>Is there another way to use PyChart into my script?
>>>
>
>
>> You are probably going to have to give more details.
>> 
>> Is there a file in your html/lgt folder called sys?
>
> No.
>
> >>> os.listdir('/var/www/html/lgt/')
> ['engine.py', 'db.py', 'index.spy', 'linetest.py', 'index.html', 
> 'db_mysql.py', 'mysession.spy', 'cds.html', 'templates', 'tmp', 'draw.py']
> >>>
>
>> 
>> How are you serving the pages?
>
> Apache 2.0.48, mod_python 3.1.3 and Python 2.3.3
> on my mdk 10.0
>


Have you tried just running the script from the command
line and not through mod_python?

If that works, there may be some security setting in 
mod_python that restricts access to certain modules.
You might want to ask on a more mod_python oriented
list....
http://mailman.modpython.org/mailman/listinfo/mod_python



From radam2_ at _tampabay.rr.com  Tue Apr 12 10:54:05 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Tue, 12 Apr 2005 14:54:05 GMT
Subject: exporting imports to reduce exe size?
Message-ID: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>


In looking at ways to reduce the size of exe's created with py2exe,
I've noticed that it will include a whole library or module even if I
only need one function or value from it.  

What I would like to do is to import individual functions and then
export 'write' them to a common resource file and import that with
just the resources I need in them.

Has anyone tried this?  

I'm considering using pickle to do it, but was wondering if this is
even a viable idea?  

Is it possible to pickle the name space after the imports and then
reload the name space in place of the imports later?

Cheers, 
Ron



From steve at holdenweb.com  Fri Apr  8 14:42:17 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 14:42:17 -0400
Subject: Can dictionary values access their keys?
In-Reply-To: <d36hv6$51$1@vegh.ks.cc.utah.edu>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>	<mailman.1544.1112978919.1799.python-list@python.org>	<d36fp0$suk$1@vegh.ks.cc.utah.edu>	<mailman.1555.1112983423.1799.python-list@python.org>
	<d36hv6$51$1@vegh.ks.cc.utah.edu>
Message-ID: <d36j54$b6v$1@sea.gmane.org>

Matthew Thorley wrote:
> Steve Holden wrote:
> 
> 
>>I think that since each Datapoint appears to be unique, the simplest
>>thing to do is to include a reference to the parent object as an
>>attribute of the datapoint. Presumably when you create the Datapoint you
>>already know which Device and Mib it's going to be stored in, so why
>>make work for yourself when you can trade a little storage and make the
>>whole thing easy?
>>
> 
> 
> I'll give that a shot and see how it goes. It makes sense, the parent
> objects create the child objects, so they could very easily set the
> apropriate parameter.
> 
Indeed, they will probably just need to pass "self" as an argument to 
the child object's creator (it will become an argument to the __init__() 
method). This will be pretty cheap, since the additional attribute will 
be bound to an already-existing value.

> On the other hand, the introspecitve stuff is cool! When you say "make
> more work for yourself" are you talking about 400 lines of code or 50.
> Further, is there much processing required to do the magic? When python
> do introspective magic, is it memory intensive? by that I mean does it
> have to make copies of the objects to do the look-ups?
> 
Frankly I am not sure I see the advantage. You seem to be saying that 
rather than provide each child object with a reference to its parent you 
would rather provide it with a reference to the collection of parent 
objects and let it work out which one it wants. Where's the benefit?

> I don't mind copying the info like you suggest, but if the extra work
> won't take more than a day or two, (or maybe even a week if its fun) I'd
> like to do the introspection so that 1: I know how, 2: I can say that I
> did ;)
> 
Basically you'd have to iterate over the list of parent objects, 
checking whether the child object's self appeared as a key in its 
dictionary of children, so there's nothing really magical about it.

The *real* magic comes about when you are looking for arbitrary 
references to an object, and you have to iterate over the locals() from 
each stack frame, and various other magical bits and pieces.

There have been posts in the past detailing such magic, so Google will 
find them for you if you are keen to bend your brain.

> Is there any kind of documentaion, (refference, article, blog-post,
> tutorial), that explains introspection in useful detail, or at least
> enough to get me started?
> 
Whole swathes of stuff already posted n c.l.py, not to mention Patrick 
O'Brien's

   http://www-106.ibm.com/developerworks/library/l-pyint.html

which has been highly spoken of.
> 
>>You might also be interested to know that the Python Software Foundation
>>funded the development of a Python package to support SNMP as a part of
>>its first round of grant funding last year, so there's at least one
>>other person working on this stuff!
>>
> 
> I did see that and I was quite pleased! :) I am currently using the
> authors 'old' pysnmp which gets me by, but I am very excited to try out
> the new version when it is ready.
> 
> 
> Thanks again, for the reply and for the grant to pysnmp!
> 
> -Matthew

Happy to help, but I can't take credit for the grant, since all I did as 
a PSF director was vote affirmatively on the recommendations of Martin 
von Lowis' extremely hard-working grants committee.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fred.dixon at gmail.com  Wed Apr 13 16:01:10 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 13 Apr 2005 13:01:10 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
Message-ID: <1113422470.180010.172970@z14g2000cwz.googlegroups.com>

ok I'm sorry, I'm not sure what your doing there.
if i have to guess it looks like yo might me modifying the imported
modules dict with another dict.

isn't there a way i can just assign to a var and have it seen no matter
what part of the code is currently executing ?



From fredrik at pythonware.com  Wed Apr 13 10:08:57 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 16:08:57 +0200
Subject: Scanner Access in Python
References: <d3j6v3$hfa$1@sea.gmane.org>
Message-ID: <d3j8vn$pgi$1@sea.gmane.org>

"GMane Python" wrote:

>  I was hoping for a bit of advise.  I wanted to know if anyone has any
> experience with scanning.  I'm mostly using Windows.  I tried quickly the
> pyTwain, but haven't gotten too far with that.  I'm not sure if scanner
> access is built-in to other packages, such as maybe PIL or any others?

the PIL source kit includes a contributed Sane interface.  (I think binary RPM:s
are available for some platforms, but I'm not sure).

</F> 





From rdm at rcblue.com  Wed Apr 13 06:27:06 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 03:27:06 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <425cefae.268278123@news.oz.net>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
Message-ID: <6.2.1.2.2.20050413032011.04fb2d00@rcblue.com>

Bengt Richter wrote at 03:19 4/13/2005:
>On Wed, 13 Apr 2005 02:06:11 -0700, Dick Moores <rdm at rcblue.com> wrote:
>
> >I need to figure out how to compute pi to base 12, to as many digits as
> >possible. I found this reference,
> ><http://mathworld.wolfram.com/Base.html>, but I really don't understand
> >it well enough. Could someone show me how to do what I need?
> >
> >Thanks,
> >
> >Dick Moores
> >rdm at rcblue.com
> >
>See if this is enough digits for homework? ;-)

This is not homework, nor am I a student, though I am trying to learn 
Python. I'm just trying to help an artist acquaintance who needs (I just 
learned) the first 3003 digits of pi to the base 12.

>Hint: Lambert Meertens. Tweak the algorithm you find ;-)

Sorry. Your hint is beyond me.

Dick Moores
rdm at rcblue.com




From carsten at uniqsys.com  Fri Apr  8 13:30:16 2005
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 08 Apr 2005 13:30:16 -0400
Subject: Ply(LALR) and Yacc behaving differently
In-Reply-To: <Pine.LNX.4.44.0504072012560.17835-100000@lgserv3.stud.cs.uit.no>
References: <Pine.LNX.4.44.0504072012560.17835-100000@lgserv3.stud.cs.uit.no>
Message-ID: <1112981416.26943.21.camel@dot.uniqsys.com>

On Thu, 2005-04-07 at 14:51, ?smund Grammeltvedt wrote:
> Hi.
> 
> I am trying to implement a small compiler in python and, trying to use 
> something a bit more pythonic than lex/yacc, ended up with ply 
> (http://systems.cs.uchicago.edu/ply/). The only problem is that whereas 
> yacc accepts the grammar and appears to parse it correctly, ply does not.
> 
> Perhaps this belongs on some compiler list, but I couldn't decide if it 
> was a compiler or a python problem, so bear with me.

Maybe this is a PLY bug? LALR(1) support appears to be a relatively
recent addition to PLY. Have you tried contacting PLY's author?

For what it's worth, it appears that you can make your example grammar
work in LALR-mode PLY by eliminating the empty production and making the
Block rule right recursive like this:

def p_Goal(p):
  """
  Goal : Block
  """

def p_Block(p):
  """
  Block : SEMI
        | T Block
        | S Block
  """

Of course, I don't know whether this rewrite is applicable to your
larger grammar.

Hope this helps,

-- 
  Carsten Haese - Software Engineer   |    Phone:  (419) 861-3331
        Unique Systems, Inc.          |      FAX:  (419) 861-3340
     1446 Reynolds Rd, Suite 313      |
         Maumee, OH  43537            |  mailto:carsten at uniqsys.com



From mwm at mired.org  Tue Apr 26 00:07:27 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 23:07:27 -0500
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <8664yanpts.fsf@guru.mired.org>

Charles Krug <cdkrug at worldnet.att.net> writes:

> I've a function that needs to maintain an ordered sequence between
> calls.
>
> In C or C++, I'd declare the pointer (or collection object) static at
> the function scope.
>
> What's the Pythonic way to do this?
>
> Is there a better solution than putting the sequence at module scope?

I'm not sure what you mean by "an ordered sequence". Assuming that a
static counter variable will do the trick (i.e. - it's values will
sequence across calls), you can do this in a number of ways:

1) Use a class:

class counterClass:
    def __init__(self):
        self.count = 1
    def __call__(self):
        self.count = self.count + 1

counterFunc = counterClass()

2) Use an instance variable of the function:

def counterFunc():
    foo.counter = foo.counter + 1
foo.counter = 1

You ought to be able to do this with closures as well, but I couldn't
seem to get that to work.

         <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From stewart.midwinter at gmail.com  Mon Apr  4 20:01:53 2005
From: stewart.midwinter at gmail.com (Stewart Midwinter)
Date: Mon, 4 Apr 2005 18:01:53 -0600
Subject: Web application toolkit recommendation?
Message-ID: <d4c0d480050404170177c7e94b@mail.gmail.com>

hi all:

I'm a python user in my day job. Now I want to take on a personal pet
project which will involve the creation of a website on my home
server.  I'll want to keep track of users through user accounts and
logins, allow them to upload information to a database (maybe mySQL or
SqLite), and in the future allow upload of GPS tracklogs and
subsequent presentation of those tracklogs on a graphical map image).

I can do all of the above today with the Leonardo project on SF, but
it's written in PHP, in which I am a relative neophyte, though I use
it to drive my own dynamic website using a mySQL database. (see
http://midtoad.homelinux.org/midwinter.ca/Poetry/index.php).

I would like to take a stab at doing this in Python instead of PHP,
but I'd like to hear from people who are familiar with both, or who
have a good understanding of web application toolkits in Python. 
Which is likely to be the least painful route?

I'm already using Snakelets for a private internet blog, and would use
this if there were a database access module available.

I don't want to hear anything about Zope - it's way too complex for my
needs or desires. Other than that, fire away!

thanks, 
-- 
Stewart Midwinter
stewart at midwinter.ca
stewart.midwinter at gmail.com
Skype: midtoad


From jerf at jerf.org  Fri Apr  8 16:34:35 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 08 Apr 2005 16:34:35 -0400
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu> <slrnd5dbs1.f3b.axel@m2.sine>
	<d36bpj$s59$1@vegh.ks.cc.utah.edu>
Message-ID: <pan.2005.04.08.20.34.34.261483@jerf.org>

On Fri, 08 Apr 2005 10:33:53 -0600, Matthew Thorley wrote:
> I must say I am *very* suprised that python does not have a way to look
> up what key is pointing to a given object--without scanning the whole
> list that is.

Assuming fairly optimal data structures, nothing is free.

Python chooses not to have bi-directional dicts built in. A good reason
for this is that it is easy to build a two-way dict out of two one-way
dicts, and there's no obvious way to build a "built-in" two-way dict that
is any more efficient than that.

Python chooses to allow all objects potentially to be dict keys, which has
overhead vs. an implementation such as that in Perl that only allows
strings. Either of those is tolerable ultimately, though I do prefer
Python's approach as I key things on objects all the time.

It's all a matter of tradeoffs. Building all the dicts as two-way in
memory consumes twice the memory and twice the processor power for a lot
of situations where the second direction isn't used, so *on average*
that's not a good tradeoff. 

Even though Python doesn't have a built-in way, it is easy to write your
own class that interoperates transparently, and there are many ones you
can grab off the 'net, even given to you in this thread :-)



From ville at spammers.com  Mon Apr 11 09:45:30 2005
From: ville at spammers.com (Ville Vainio)
Date: 11 Apr 2005 16:45:30 +0300
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net>
Message-ID: <du71x9ho29x.fsf@mozart.cc.tut.fi>

>>>>> "Claudio" == Claudio Grondi <claudio.grondi at freenet.de> writes:

    Claudio> Is it already known, that after switching the keyboard
    Claudio> input scheme on German Windows 2000 to english USA
    Claudio> International IPython generates \x00" instead of " when
    Claudio> trying to input quotation marks?

This has been reported previously - apparently it's a problem with
Gary's readline module (or however it was called ;-), and hacking it
solved the problem for someone. I suggest you search the ipython
mailing list archives, or post this question there.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From mail at peterbe.com  Mon Apr 25 08:42:38 2005
From: mail at peterbe.com (Peter Bengtsson)
Date: Mon, 25 Apr 2005 12:42:38 +0000 (UTC)
Subject: Squezing in replacements into strings
References: <mailman.2446.1114430162.1799.python-list@python.org>
	<d4in0e$d7s$03$1@news.t-online.com>
Message-ID: <loom.20050425T144124-331@post.gmane.org>

Peter Otten <__peter__ <at> web.de> writes:

> 
> > How can I do this this concatenation correctly?
> 
> I think sub() is more appropriate than finditer() for your problem, e. g.:
> 
> >>> def process(match):
> ...     return "_%s_" % match.group(1).title()
> ...
> >>> re.compile("(peter)", re.I).sub(process, "Peter Bengtsson PETER, or
> PeTeR")
> '_Peter_ Bengtsson _Peter_, or _Peter_'
> >>>

Ahaa! Great. I didn't realise that I can substitute with a callable that gets
the match object. Hadn't thought of it that way. 
Will try this now.



From jack at performancedrivers.com  Tue Apr 12 09:34:06 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Tue, 12 Apr 2005 09:34:06 -0400
Subject: some sort of permutations...
In-Reply-To: <797fe3d405041205413e96df2d@mail.gmail.com>
References: <9468aec7.0504112228.5d018278@posting.google.com>
	<d3fq51$iho$1@sea.gmane.org>
	<797fe3d405041205413e96df2d@mail.gmail.com>
Message-ID: <20050412133406.GC25032@performancedrivers.com>

On Tue, Apr 12, 2005 at 08:41:15AM -0400, Bill Mill wrote:
> On Apr 12, 2005 2:37 AM, Fredrik Lundh <fredrik at pythonware.com> wrote:
> > "Bernard A." wrote:
> > 
> > > i'm looking for a way to have all possible length fixed n-uples from a
> > > list, i think generators can help, but was not able to do it myself,
> > > maybe some one could point me out to an idea to do it ?
> > 
> > did you try googling for "python permutations" ?
> > 
> > here's the first hit:
> > 
> >     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465
> > 
> 
> I've used that recipe a significant amount, and I feel like its
> recursion really slows it down (but I haven't been profiled it). Does
> anyone know of a non-recursive algorithm to do the same thing?

If you need the speed probstat.sf.net has permutations, combinations,
and cartesian products written in C.  I'm the author and I use pure-python
versions when I know I'm just doing small lists (to avoid a dependency).

>From your original problem it looks like you want a combination, not
a permutation.  Combinations don't care about order (just unique sets).

>>> import probstat
>>> for (item) in probstat.Combination([0,1,2,3,4], 3):
...   print item
... 
[0, 1, 2]
[0, 1, 3]
[0, 1, 4]
[0, 2, 3]
[0, 2, 4]
[0, 3, 4]
[1, 2, 3]
[1, 2, 4]
[1, 3, 4]
[2, 3, 4]

-jackdied


From cdkrug at worldnet.att.net  Thu Apr 21 10:36:40 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Thu, 21 Apr 2005 14:36:40 GMT
Subject: Is there a package with convolution and related methods?
Message-ID: <YTO9e.98425$cg1.44378@bgtnsc04-news.ops.worldnet.att.net>

List:

Is there a Python package with Convolution and related methods?

I'm working on modeling some DSP processes in Python.  I've rolled one
up, but don't feel much like reinventing the wheel, especially if
there's already something like "Insanely Efficient FFT for Python"
already.

Thanks


Charles



From programmer.py at gmail.com  Tue Apr 19 10:47:02 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Tue, 19 Apr 2005 09:47:02 -0500
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
In-Reply-To: <d4080i$q8d$1@titan.btinternet.com>
References: <d4080i$q8d$1@titan.btinternet.com>
Message-ID: <d52c72d205041907476b0e7b1@mail.gmail.com>

I fight the python24_d.lib problem with swig daily.  The way I got
around it was to modify swig's python configuration module.  Mine was
located at

/lib/swig1.3/python/python.swg

(I'm using cygwin)

At the top, I changed

#include "python.h"

to

#ifdef _DEBUG
  #undef _DEBUG
  #include "python.h"
  #define _DEBUG
#else
  #include "python.h"
#endif

Somewhere in the includes, python uses a pragma telling the MSVC
compiler which library to link the object files against.  Because
you're building a _DEBUG build, you magically get the python24_d.lib
library.

hth,
jw

On 4/18/05, Bill Davy <Bill at synectixltd.com> wrote:
> I downlaoded and installed
> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
> 
> I'm trying to build an extension using SWIG 1.3.24 and the linker needs
> python24_d.lib (I do not have the DLL either).  I've not found it in any of
> the
> downloads.
> 
> So I tried to download the source to build it myself.  Of
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tar.bz2 and
> http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz, WinZip (9.0 SR1)
> just says "Error reading header after processing 0 entries".
> 
> Additionally, I've had no joy downloading the unzipper
> (ftp://sources.redhat.com/pub/bzip2/v102/bzip2-102-x86-win32.exe) from the
> site cited for the unzipper (http://sources.redhat.com/bzip2/).  It flashed
> up a
> black console window momentarily.
> 
> Oh, this is sooooo frustrating! :-(
> 
> Can anyone point me in the right direction?
> 
> And then I can get to grips with my work.
> 
> tia
>     Bill
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From fredrik at pythonware.com  Thu Apr 21 11:53:35 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 17:53:35 +0200
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
Message-ID: <d48i1t$mp6$1@sea.gmane.org>

"codecraig" <codecraig at gmail.com> wrote:

> Well so far from what I have found, Perl is faster than Python for
> RegEx, although perl is harder to read.

is this based on actual benchmarks, or just what people are saying on
the intarweb?

</F>



From jstroud at mbi.ucla.edu  Thu Apr 14 22:27:00 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 14 Apr 2005 19:27:00 -0700
Subject: Rookie Question: Passing a nested list into a function?
In-Reply-To: <oIWdnebQUt6Tg8LfRVn-sw@comcast.com>
References: <oIWdnebQUt6Tg8LfRVn-sw@comcast.com>
Message-ID: <200504141927.00326.jstroud@mbi.ucla.edu>


Do you really want quotation marks around "titlelist1[x][1]" ?

e.g.

>>> textfilelist = [["titlelist1[x][1]"]]
>>> textfilelist[0][1]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IndexError: list index out of range



On Thursday 14 April 2005 06:51 pm, Brett wrote:
> I am trying to pass the value of a nested list into a function (to my "if"
> statement) as follows:
>
> textfilelist = [["titlelist1[x][1]"]]
> def idfer(listlength, comparelistlength, list):
>         while x < (listlength - 1):
>                        while y < comparelistlength:
>                             if list == titlelist2[y][1]:
> (I cutoff the end to focus on the problem)
>
> #Here i call my function hoping i am passing the value within
> textfilelist[0][0] to my function
> idfer(textfilelist[0][1], textfilelist[1][1], textfilelist[0][0])
>
>
> --------------
> I don't if there is a "legal" way to do this, but I would appreciate some
> guidance.
>
> Thanks,
>
> Brett

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

http://www.jamesstroud.com/


From sizer at nospam.com  Mon Apr 11 19:07:06 2005
From: sizer at nospam.com (Sizer)
Date: 11 Apr 2005 18:07:06 -0500
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <Xns9635A41E5C30Asizernospamcom@216.40.28.87>

"Kanthi Kiran Narisetti" <TechAlerts at gmail.com> wrote in 
news:1113253691.821235.9750 at o13g2000cwo.googlegroups.com:

> I am Windows Systems Administrator(planning to migrate to Linux
> administration in near future), I have occassionally written few batch
> files and Vbscripts to automate my tasks.
> 
> Now I have strong interest to learn a programming language that would
> help me to write Scripts or Application ( In Systems Administrative
> point of view) .
> [...]
> I am confused to chose between C++,Python,Perl.

I admin both Windows and Linux (Slackware, Debian) boxes, and I think 
your best choice is either Python or learning bash scripting. C++ is just 
no good - I use it for some large applications, but for sysadmin and 
utility stuff it just takes 10 times as much work to get anything done as 
Python does.

bash scripting is still the way most people seem to do these things on 
linux (it's equivalent to batch files under Windows/DOS but far more 
powerful), which is the reason I suggest you take a look at it - it's 
still useful for writing small things that you want to send to other 
people where you don't know if they have python installed. Of course this 
is made less useful for you because you need to install a bash 
interpreter on Windows so it's no longer cross platform.

I suggest you learn Python instead of Perl. Perl and Python are close 
enough in terms of functionality (with a little give and take, please no 
holy wars), so I wouldn't say one is Better than the other if you already 
know it. But for someone starting from scratch I think you will find that 
while the perl program may be smaller the python program will be far more 
readable, maintainable, and easier to write.

I use bash scripting for small stuff (just simple command lines in 
sequence), C++ and Java for a few things that require it (though I really 
hate them both after using Python) and Python whenever I can. Python on 
Linux/Windows is amazingly cross platform as long as you use functions 
like os.path.join('dir','file') instead of hardcoding 'dir\\file' into 
your code.  And use the glob, shutil, and os libraries to do all your 
hard work for you.


From mahs at telcopartners.com  Wed Apr 27 21:33:49 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 27 Apr 2005 18:33:49 -0700
Subject: Trigraph Idiom - Original?
In-Reply-To: <1114644362.854156.317830@l41g2000cwc.googlegroups.com>
References: <1114644362.854156.317830@l41g2000cwc.googlegroups.com>
Message-ID: <d4pe6k$i8p$1@sea.gmane.org>

Jeff Winkler wrote:
> I've come up with...

> cssClass=['rssLink','rssLinkNew'][hoursOld<12]

Not hideous, but:

  >>> cssClass=('rssLink','rssLinkNew')[hoursOld<12]

is IMO, slightly less surprising,

and in this context:

  >>> cssClass = hoursOld<12 and 'rssLinkNew' or 'rssLink'
  >>>

reads better too

Michael



From gandalf at geochemsource.com  Wed Apr 20 11:51:02 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Wed, 20 Apr 2005 17:51:02 +0200
Subject: logging to two files
In-Reply-To: <d45rvr$rrm$1@news.uit.no>
References: <d45rvr$rrm$1@news.uit.no>
Message-ID: <42667A66.4070402@geochemsource.com>

Tor Erik S?nvisen wrote:

>Hi
>
>Have the following code:
>import logging
>
>        logging.basicConfig(level = logging.DEBUG,
>                            format = '[%(levelname)-8s %(asctime)s] 
>%(message)s',
>                            filename = 'rfs.log',
>                            filemode = 'w')
>
>When using logging.(debug, info etc) stuff is logged to rfs.log.
>How may I specify another log with different charateristics, such as a 
>different file
>
>regards 
>
>
>  
>
I'm not sure if I understood your problem. However, just a tip for you: 
is it possible to create your own handler object? (See section 6.29.5 in 
the library reference).
You could setup a handler object that holds a list of other handler 
objects and distribute all logging events to them. This way you should 
be able to add/remove handlers at runtime.

Best,

   Laci 2.0

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From jepler at unpythonic.net  Tue Apr 12 09:42:54 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 12 Apr 2005 08:42:54 -0500
Subject: Why won't someone step up and make use of the Free tools (was Re:
	Python 2.4 killing commercial Windows Python development ?)
In-Reply-To: <425a9869$0$38039$bed64819@news.gradwell.net>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
Message-ID: <20050412134250.GB2419@unpythonic.net>

I'm sorry that this is going to come out sounding like a flame, but it
seems to me that there today only a few technical problems remaining
with Python when built with mingw32.

If one of the people who has expressed such deep concern about this
"msvcr71.dll" problem would simply install the Free tools and start
putting patches on sourceforge, it's quite possible that for the next
2.4.x release the mingw32 "port" could be a first-rate one, and suitable
for the uses that the posters in this thread have mentioned.

Since mingw32 is Free (gpl and other licenses for tools, public domain
libraries and copyrighted headers with "no restrictions for programs"
built using the headers) anyone can install and use these tools and
mingw creates no new problems with distribution of the resulting binary,
whether the final product is Free or proprietary.

(Admittedly I don't know anything about whether "win32all" builds under
mingw32, and it's not clear whether binary compatibility with extensions
built by microsoft compilers is an easy goal either)

http://www.mingw.org/

Jeff
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From apardon at forel.vub.ac.be  Wed Apr 20 09:39:42 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 20 Apr 2005 13:39:42 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
Message-ID: <slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Bill Mill schreef <bill.mill at gmail.com>:
> On 20 Apr 2005 12:52:19 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>> Op 2005-04-20, Torsten Bronger schreef <bronger at physik.rwth-aachen.de>:
>> > Hall?chen!
>> >
>> > nde at no.spam.org (Nick Efford) writes:
>> >
>> >> seberino at spawar.navy.mil <seberino at spawar.navy.mil> wrote:
>> >>> Many people I know ask why Python does slicing the way it does.....
>> >>
>> >>> Can anyone /please/ give me a good defense/justification???
>> >>
>> >>> I'm referring to why mystring[:4] gives me elements 0, 1, 2 and 3
>> >>> but *NOT* mystring[4] (5th element).
>> >>
>> >> mystring[:4] can be read as "the first four characters of
>> >> mystring".  If it included mystring[4], you'd have to read it as
>> >> "the first five characters of mystring", which wouldn't match the
>> >> appearance of '4' in the slice.
>> >>
>> >> [...]
>> >>
>> >> It all makes perfect sense when you look at it this way!
>> >
>> > Well, also in my experience every variant has its warts.  You'll
>> > never avoid the "i+1" or "i-1" expressions in your indices or loops
>> > (or your mind ;).
>> >
>> > It's interesting to muse about a language that starts at "1" for all
>> > arrays and strings, as some more or less obsolete languages do.  I
>> > think this is more intuitive, since most people (including
>> > mathematicians) start counting at "1".  The reason for starting at
>> > "0" is easier memory address calculation, so nothing for really high
>> > level languages.
>> 
>> Personnaly I would like to have the choice. Sometimes I prefer to
>> start at 0, sometimes at 1 and other times at -13 or +7.
>> 
>
> -1. You can start arrays at 0 or 1 (and arbitrary bases? I don't
> recall) in VB, and it's an unmitigated disaster. It adds needless
> complexity.

Complexity that is now put on the programmers shoulders.

If I have a table with indexes going from -13 to +7, I have to
add the offset myself if I want to use a list for that.

> What our slicing system loses in elegance in a few cases,
> it more than makes up for in consistency throughout all programs.

You write this af if other solutions can't be consistent.

-- 
Antoon Pardon


From eric_brunel at despammed.com  Wed Apr 27 05:16:33 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Wed, 27 Apr 2005 11:16:33 +0200
Subject: Getting the sender widget's name in function (Tkinter)
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
	<1114547849.644971.191270@f14g2000cwb.googlegroups.com>
Message-ID: <opspvv1vyxrqur0o@eb.pragmadev>

On 26 Apr 2005 13:37:29 -0700, infidel <saint.infidel at gmail.com> wrote:

> from Tkinter import Tk, Button
>
> def say_hello(event):
>     print 'hello!'
>     print event.widget['text']
>
> root = Tk()
> button1 = Button(root, text='Button 1')
> button1.bind('<Button-1>', say_hello)
> button1.pack()
> button2 = Button(root, text='Button 2')
> button2.bind('<Button-1>', say_hello)
> button2.pack()
> root.mainloop()

Unfortunately, making a binding to <Button-1> on Button widgets does not have the same behavior as setting their 'command' option. The binding will fire when the button is *pressed*; the command will be called when the button is *released*. So, binding to <ButtonRelease-1> instead of <Button-1> make things a little better, but still does not have the same effect, since ButtonPress and ButtonRelease events are balanced: the widget getting the ButtonRelease event is always the same as the one getting the ButtonPress event. So if the mouse button is pressed inside the Button, then the mouse pointer goes out of it, and then the mouse button is released, the Button will still get the ButtonRelease event and fire the binding. This is not the normal behavior for a button and this is not the behavior you get via the 'command' option (just try it...).

So having a different function for each button or using tiissa's solution is definitely better.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17;8(%,5.Z65\\'*9--56l7+-'])"


From danb_83 at yahoo.com  Fri Apr 15 19:20:59 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 15 Apr 2005 16:20:59 -0700
Subject: trouble using \ to escape %
References: <1113606334.524947.54630@l41g2000cwc.googlegroups.com>
Message-ID: <1113607259.470430.241750@f14g2000cwb.googlegroups.com>

Lucas Machado wrote:
> I'm writing a python script that modifies the smb.conf file, and i
need
> to write the characters '%U' in the file.  I tried making a string
like
> so:
>
> str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%U" % (list[0], list[1],
> list[0], list[1])
>
> but i keep getting: "TypeError: not enough arguments for format
> string". I've also tried making the string:
>
> str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%" % (list[0], list[1],
> list[0], list[1])
>
> but i get: "ValueError: incomplete format". These errors lead me to
> believe that for some reason it is not escaping the '%' character.
> There has to be a way to write '%' to a file. Thanks in advance..

>>> percentage = 93
>>> # The string % operator uses "%%" for the percent sign.
>>> format_string = "%d%% of all statistics are made up on the spot."
>>> print format_string % percentage
93% of all statistics are made up on the spot.
>>> # When the % operator is not used, "%" is just another character.
>>> print format_string
%d%% of all statistics are made up on the spot.
>>>



From peufeu at free.fr  Mon Apr 11 05:26:00 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Mon, 11 Apr 2005 11:26:00 +0200
Subject: HELP ! Anybody knows where the stackless python website is ?
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<d5uxzk7q.fsf@python.net> <42185D66.1020203@v.loewis.de>
Message-ID: <op.so19tmaeqfv3if@localhost>

	Hello !

	I've been trying desperately to access http://www.stackless.com but it's  
been down, for about a week now !
	I desperatly need to download stackless python...
	Of course the stackless mailing list is on their server, so it's down,  
too.

	Does anybody has any info ?
	Does anybody have a tarball of a recent version of stackless that I may  
use (with the docs ?)

	Thanks !

	Regards,
	P.F. Caillaud


From merkosh at hadiko.de  Fri Apr  8 04:21:40 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Fri, 08 Apr 2005 10:21:40 +0200
Subject: changing from python2.3 to python2.4
Message-ID: <d35eul$kj7$1@news2.rz.uni-karlsruhe.de>

I've written a little application which uses the bang-line 
#!/usr/bin/python

to call the interpreter. As python 2.4 comes distributed with other distroes
this breaks my application as its modules are installed
in /usr/local/lib/python2.3/site-packages/... and python2.4 does not look
there.

How do you suggest dealing with this:
- is calling /usr/bin/python2.3 in the bang-line problematic?
- installing into both python2.3 and python2.4 
- rebuilding (re- ./configure, make, make install) the app solves the
problem

Whats the usual way to deal with this?

Thanks
Uwe     


From bvande at po-box.mcgill.ca  Mon Apr  4 19:37:06 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 04 Apr 2005 19:37:06 -0400
Subject: testing -- what to do for testing code with behaviour dependant
 upon which files exist?
In-Reply-To: <pan.2005.04.04.21.26.42.319488@jerf.org>
References: <424F00D5.9020205@po-box.mcgill.ca> <d2o44f$q1e$1@sea.gmane.org>
	<mailman.1321.1112648615.1799.python-list@python.org>
	<pan.2005.04.04.21.26.42.319488@jerf.org>
Message-ID: <4251CFA2.3010101@po-box.mcgill.ca>

Jeremy Bowers said unto the world upon 2005-04-04 17:26:
> On Mon, 04 Apr 2005 17:02:20 -0400, Brian van den Broek wrote:
> 
>>Jeremy suggested using a directory name akin to 
>>"C:\onlyanidiotwouldhavethisdirecotrynameonadrive". That is what I had 
>>settled on before I posted. Somehow it feels unhappy and inelegant. 
>>But, I'm a bit less uncomfortable with it seeing that others have done 
>>so, too.
> 
> 
> To be clear, I would actually suggest
> "onlyanidiotwouldhavethisdirecotrynameonadrive"... note the lack of C:\,

Quite so. My apologies for mis-characterizing your suggestion. And 
thanks for the additional information that mis-characterization 
provoked :-)

Best,

Brian vdB

> which would be platform specific, as would any other root specification.
> Take advantage of the fact that every system I know of makes relative
> directories easy, and also note you can work out what directory the
> "current file" is in with a combination of __file__ and os.getcwd() (and
> that while that won't work if someone changes the working directory,
> that's bad form and IIRC breaks some other things in Python as well, so
> don't do that). 
> 
> Making it a relative directory may make it look just as bad, but it is in
> some sense somewhat less inelegant; at that point, if someone is creating
> that directory in the test directory of your app, they're just fooling
> with you, and you don't really have to worry about people who maliciously
> make your unit tests fail under most circumstances... :-)




From fredrik at pythonware.com  Wed Apr 13 08:01:53 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 14:01:53 +0200
Subject: Has Python 2.4.1 changed implementation for __init__.py???
References: <d3j0uc$fak$1@nntp.fujitsu-siemens.com>
Message-ID: <d3j1hg$t1a$1@sea.gmane.org>

Werner Merkl wrote:

> I just downloaded http://www.python.org/pypi/xexpr/0.02, installed
> if (python setup.py install) and tried the example in the README file.
>
> Than I got following error: AttributeError: 'module' object has no attribute 'Read'
>
> This is same behavior for all module using empty __init__.pr files,
> like venster, Pyrex or libxmlmods...

if "xexpr" is a package with an empty __init__.py file, the behaviour you're
seeing is the expected behaviour.  importing a toplevel module doesn't auto-
matically import any submodules.

> Is there a change in the implementation, so that every module needs an
> explicit list for exchanged modules?

what's an "exchanged module"?

> EXAMPLE
> ------------------------------------------------------------------------
>
> Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import xexpr
> >>> example = '<foo a="b" c="d"><bar><baz a="d" />Blah</bar></foo>'
> >>> xexpr.Read.to_xexpr(example)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'module' object has no attribute 'Read'
> >>>

does it work better if you type

    import xexpr.Read

before you call the to_xexpr function?

</F> 





From fredrik at pythonware.com  Sun Apr 17 06:53:55 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 17 Apr 2005 12:53:55 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
Message-ID: <d3tevm$s33$1@sea.gmane.org>

William Park wrote:

> You may want to try Expat (www.libexpat.org) or Python wrapper to it.

Python comes with a low-level expat wrapper (pyexpat).

however, if you want performance, cElementTree (which also uses expat) is a
lot faster than pyexpat.  (see my other post for links to benchmarks and code).

</F>



From fredrik at pythonware.com  Sun Apr 24 14:21:42 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 20:21:42 +0200
Subject: Getting into Python, comming from Perl.
References: <426BDDB7.8010403@amplitudenet.pt>
Message-ID: <d4gnpq$huf$1@sea.gmane.org>

Miguel Manso wrote:

> I've tryed to use python some times but I get frustrated very quick.  I
> get myself many times needing to figure out how to loop through a list,

http://docs.python.org/tut/node6.html#SECTION006200000000000000000

> declare an associative array,

http://docs.python.org/tut/node7.html#SECTION007500000000000000000

> checking how to pass named parameters to functions,

http://docs.python.org/tut/node6.html#SECTION006720000000000000000

I suggest spending 30 minutes to read through chapters 1-7 of the tutorial
again.
(when you've tinkered a little more, read chapters 8-11).  getting a good
Python
book could also help.

</F>





From tzot at sil-tec.gr  Tue Apr 26 09:04:04 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 26 Apr 2005 16:04:04 +0300
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<7loi61dq62m6gjutqoj52lgkaf2j4qm0g0@4ax.com>
Message-ID: <ites61l45vkch9kqtdfvj4ps3i5cuhp8du@4ax.com>

On Sat, 23 Apr 2005 06:57:00 +1000, rumours say that John Machin
<sjmachin at lexicon.net> might have written:

>On 22 Apr 2005 12:22:41 -0700, "fuzzylollipop"
><jarrod.roberson at gmail.com> wrote:

>>try spelling license correctly next time

>Yup, pesky furriners, can't spell 'Merican prop'ly like God intended;
>they shouldn't be allowed on the net, sheriff should run 'em right out
>o' the county ...

Sheriff is not available, for further info pls ask for R. Marley.

>> and heading
>
>Would that be like heading a soccer ball?

Or heeding the sucker call (like I just did?)

>>the google
>>suggestions that probably looked like "didn't you mean : Python License"

>You might find, were you to try it, that it makes no such suggestions.

Google isn't what it used to be when I was 6 yrs old.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From jabel at plus.net  Fri Apr 29 06:45:37 2005
From: jabel at plus.net (John Abel)
Date: Fri, 29 Apr 2005 11:45:37 +0100
Subject: Getting PID for process
In-Reply-To: <1114770926.016150.181310@l41g2000cwc.googlegroups.com>
References: <1114770926.016150.181310@l41g2000cwc.googlegroups.com>
Message-ID: <42721051.9040801@plus.net>

try:

import os

myPID = os.getpid()

So you can kill it at a later date, it would be worth writing that out 
to a file somewhere - C:\temp?  I'm sure you can get a kill command for 
Win32.

HTH

J

Harlin Seritt wrote:

>Let's say I have a simple script on Windows NT. I would like for that
>script to find its own PID once it's started and store that as a value
>within the script. Also, down the road I'd like to kill that process by
>its PID. How is this done?
>
>Thanks,
>
>Harlin Seritt
>
>  
>



From dmbkiwi at gmail.com  Wed Apr 27 16:58:14 2005
From: dmbkiwi at gmail.com (dmbkiwi at gmail.com)
Date: 27 Apr 2005 13:58:14 -0700
Subject: kdialog and unicode
In-Reply-To: <h4uu615taeb5dsr1vkb5af8mr05nrpk63e@4ax.com>
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
	<8d7dabda.0504261239.37952804@posting.google.com>
	<8aft611878hr6d3an0n55rbk23mm71hpht@4ax.com>
	<1114568185.015176.238000@g14g2000cwa.googlegroups.com>
	<h4uu615taeb5dsr1vkb5af8mr05nrpk63e@4ax.com>
Message-ID: <1114635494.393858.222360@o13g2000cwo.googlegroups.com>


John Machin wrote:
> On 26 Apr 2005 19:16:25 -0700, dmbkiwi at gmail.com wrote:
>
> >
> >John Machin wrote:
> >> On 26 Apr 2005 13:39:26 -0700, dmbkiwi at gmail.com (dumbkiwi) wrote:
> >>
> >> >Peter Otten <__peter__ at web.de> wrote in message
> >news:<d4l92e$9di$05$1 at news.t-online.com>...
> >> >> Dumbkiwi wrote:
> >> >>
> >> >> >> Just encode the data in the target encoding before passing
it
> >to
> >> >> >> os.popen():
> >>
> >> >
> >> >Anyway, from your post, I've done some more digging, and found
the
> >> >command:
> >> >
> >> >sys.setappdefaultencoding()
> >> >
> >> >which I've used, and it's fixed the problem (I think).
> >> >
> >>
> >> Dumb Kiwi, eh? Maybe not so dumb -- where'd you find
> >> sys.setappdefaultencoding()? I'm just a dumb Aussie [1]; I looked
in
> >> the 2.4.1 docs and also did import sys; dir(sys) and I can't spot
it.
> >
> >Hmmm. See post above, seems to be something generated by eric3.  So
> >this may not be the fix I'm looking for.
> >
> >>
> >> In any case, how could the magical sys.setappdefaultencoding() fix
> >> your problem? From your description, your problem appeared to be
that
> >> you didn't know what encoding to use.
> >
> >I knew what encoding to use,
>
> Would you mind telling us (a) what that encoding is (b) how you came
> to that knowledge (c) why you just didn't do

(a)  utf-8
(b)  I asked the author of the text, and it displays properly in other
parts of the script when not using kdialog.  Is there a way to test it
otherwise - I presume that there is.

>
> test = os.popen('kdialog --inputbox %s'
> %(data.encode('that_encoding')))
>
> instead of
>
> test = os.popen('kdialog --inputbox %s' %(data.encode('utf-8')))

Because, "that_encoding" == "utf-8" (as far as I was aware).

>
> > the problem was that the text was being
> >passed to kdialog as ascii.
>
> It wasn't being passed to kdialog; there was an attempt which failed.

Quite right.

>
> >  The .encode('utf-8') at least allows
> >kdialog to run, but the text still looks like crap.  Using
> >sys.setappdefaultencoding() seemed to help.  The text looked a bit
> >better - although not entirely perfect - but I think that's because
the
> >font I was using didn't have the correct characters (they came up as
> >square boxes).
>
> And the font you *were* using is what? And the font you are now using
> is what? What facilities do you have to use different fonts?

The font I was using was bitstream vera sans.  The font I'm now using
is verdana.

>
> >>
> >> What is the essential difference between
> >>
> >>    send(u_data.encode('polish'))
> >>
> >> and
> >>
> >>    sys.setappdefaultencoding('polish')
> >>    ...
> >>    send(u_data)
> >
> >Not sure - I'm new to character encoding, and most of this seems
like
> >black magic to me.
>
> The essential difference is that setting a default encoding is a daft
> idea.
>
Because it acheives nothing more than what I can do with
.encode('that_encoding')?

>
> >
> >>
> >> [1]: Now that's *TWO* contenders for TautologyOTW :-)
> >>
>
> Before I retract that back to one contender, I'll give it one more
> shot:
>
Aaah, there's nothing better than a bit of cheerful snarkiness on a
newsgroup.

> 1. Your data: you say it is Polish text, and is utf-8. This implies
> that it is in Unicode, encoded as utf-8. What evidence do you have?

See above.

> Have you been able to display it anywhere so that it "looks good"?

Yes.  What I am doing here is a theme for a superkaramba widget (see
http://netdragon.sourceforge.net).  It displays fine everywhere else on
the widget, it's just in the kdialog boxes that it doesn't display
correctly.

> If it's not confidential, can you show us a dump of the first say 100
> bytes of text, in an unambiguous form, like this:

Can't do it now, because I'm at work.  I can do it when I get home
tonight.

>
> print repr(open('polish.text', 'rb').read(100))
>
> 2. Your script: You say "I then manipulate the data to break it down
> into text snippets" - uh-huh ... *what* manipulations? Care to tell
> us? Care to show us the code?

Manipulation is simply breaking the text down into dictionary pairs.
It is basically a translation file for my widget, with English text,
and a corresponding Posish text.  I use the re module to parse the
file, and create dictionary pairs between the English text, and the
corresponding Polish text.

>
> 3. kdialog: I know nothing of KDE and its toolkit. I would expect
> either (a) it should take utf-8 and be able to display *any* of the
> first 64K (nominal) Unicode characters, given a Unicode font or (b)
> you can encode your data in a legacy charset, *AND* tell it what that
> charset is, and have a corresponding font or (c) you have both
> options. Which is correct, and what are the details of how you can
> tell kdialog what to do -- configuration? command-line arguments?

That's what I was hoping someone here might be able to tell me.  Having
searched on line, I cannot find any information about kdialog and
encoding.  I have left a message on the relevant kde mailing list, but
have had no response.  The command line options are found with kdialog
--help, but as you don't have kde, it will be difficult for you to look
at those.  Having examined them at length, there is no option for
encoding.
> 
> HTHYTHYS,
> 
> John

Thanks for your help and interest.

Matt



From jjl at pobox.com  Sun Apr  3 09:36:18 2005
From: jjl at pobox.com (John J. Lee)
Date: 03 Apr 2005 13:36:18 +0000
Subject: string goes away
References: <mailman.1156.1112322721.1799.python-list@python.org>
	<Xns962B5D9DAB99Eduncanrcpcouk@127.0.0.1>
Message-ID: <87d5tcouct.fsf@pobox.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:
[...]
>    str.join(sep, list_of_str)
[...]

Doesn't work with unicode, IIRC.



John


From tzot at sil-tec.gr  Wed Apr 20 11:56:42 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 18:56:42 +0300
Subject: random number between 0 and 20
References: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
	<_c-dnaseE4DQ7vvfRVn-3A@powergate.ca>
Message-ID: <eruc611pbdrsmpaqp9hvijh7l9u7nt9p6f@4ax.com>

On Wed, 20 Apr 2005 11:10:21 -0400, rumours say that Peter Hansen
<peter at engcorp.com> might have written:

>NNTP-Posting-Date: Wed, 20 Apr 2005 10:20:45 -0500
>Date: Wed, 20 Apr 2005 11:10:21 -0400

Based on these headers from your message, plus the fact that you
answered five minutes before aleksander asked his question, you might
want to either check your computer clock for accuracy or return the time
machine to Guido...
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From Bill at SynectixLtd.com  Fri Apr 22 08:32:16 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Fri, 22 Apr 2005 12:32:16 +0000 (UTC)
Subject: IDLE: How to point it to the Python executables I want it to see on
	Windows
Message-ID: <d4aqsg$f4v$1@sparta.btinternet.com>

Assuming they run as a separate thread, I want to point IDLE to 
.../Debug/Python_d.exe one day and .../Release/Python.exe for the next.
Also, is there any easy way to run the .../Debug/Python_d.exe so started 
under the MSVC debugger?
tia,
    Bill 




From martin at v.loewis.de  Sun Apr 17 14:03:57 2005
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sun, 17 Apr 2005 20:03:57 +0200
Subject: unicode "em space" in regex
In-Reply-To: <1113744266.026254.183300@o13g2000cwo.googlegroups.com>
References: <1113652436.971442.311570@z14g2000cwz.googlegroups.com>
	<4261442D.1010800@v.loewis.de>
	<1113744266.026254.183300@o13g2000cwo.googlegroups.com>
Message-ID: <4262a50d$0$27740$9b622d9e@news.freenet.de>

Xah Lee wrote:
> Thanks. Is it true that any unicode chars can also be used inside regex
> literally?
> 
> e.g.
> re.search(ur'?+',mystring,re.U)
> 
> I tested this case and apparently i can. 

Yes. In fact, when you write u"\u2003" or u"?" doesn't matter
to re.search. Either way you get a Unicode object with U+2003
in it, which is processed by SRE.

> But is it true that any
> unicode char can be embedded in regex literally. (does this apply to
> the esoteric ones such as other non-printing chars and combining
> forms...)

Yes. To SRE, only the Unicode ordinal values matter. To determine
whether something matches, it needs to have the same ordinal value
in the string that you have in the expression. No interpretation
of the character is performed, except for the few characters that
have markup meaning in regular expressions (e.g. $, \, [, etc)

Regards,
Martin


From deetsNOSPAM at web.de  Thu Apr 14 17:43:01 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 14 Apr 2005 23:43:01 +0200
Subject: How to debug SOAP using TCpMon and Python?
References: <wNydnQ8ROuBR0sHfRVn-qw@rogers.com>
Message-ID: <d3mo50$fa6$05$1@news.t-online.com>

Jim wrote:

> Hello,
> 
> I am trying to debug a Python SOAP
> application using tcpmon. I am wondering what
> listen port, target port number and host
> address should I use.
> 
> What about optional parameters: Http Proxy
> support, host and port?

Did you try setting the usual environment variables - e.g. HTTP_PROXY? You
should start tcpmon as proxy and listen to a certain port. Then let
HTTP_PROXY point to localhost:<port>.
-- 
Regards,

Diez B. Roggisch


From simon.brunning at gmail.com  Thu Apr 21 09:30:22 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 21 Apr 2005 14:30:22 +0100
Subject: XML parsing per record
In-Reply-To: <pan.2005.04.21.13.17.45.470495@gmail.com>
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<426640b6$1_1@newspeer2.tds.net>
	<pan.2005.04.21.13.17.45.470495@gmail.com>
Message-ID: <8c7f10c6050421063041466993@mail.gmail.com>

On 4/21/05, Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
> Sorry I just decided that I want to use your solution, but I am wondering
> is cElemenTree in expat or is that something different?

Nope, cElemenTree is  very much its own man. See
<http://effbot.org/zone/celementtree.htm>.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From matt.fryer at gmail.com  Thu Apr 28 12:56:33 2005
From: matt.fryer at gmail.com (Matt)
Date: 28 Apr 2005 09:56:33 -0700
Subject: Which IDE is recommended?
In-Reply-To: <pd5171dmt0lfj8bu4qtji28dq6smeuhlq1@4ax.com>
References: <426f90ac$1_2@rain.i-cable.com>
	<1114612588.435456.296960@z14g2000cwz.googlegroups.com>
	<pd5171dmt0lfj8bu4qtji28dq6smeuhlq1@4ax.com>
Message-ID: <1114707393.897778.228080@f14g2000cwb.googlegroups.com>

Franz,

To ask for help otherwise, use the forums link from
http://sourceforge.net/projects/activegrid/

--Matt



From fredrik at pythonware.com  Sun Apr 24 07:24:58 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 13:24:58 +0200
Subject: Unicode problems, yet again
References: <mailman.2362.1114309342.1799.python-list@python.org>
	<d4foo1$vnr$1@bagan.srce.hr>
Message-ID: <d4fvcf$ngr$1@sea.gmane.org>

Ivan Voras wrote:

> One thing that I always wanted to do (but probably can't be done?) is to
> set the default/implicit encoding to the one I'm using...

You can hack this into site.py, or mess with sitecustomize.py, but I don't
recommend it.

> I often have to deal with 8-bit encodings and rarely with unicode.

You often have to deal with non-ASCII text, that is.  Unicode is Python's
to deal with non-ASCII text in a portable way.  There's no need for you
to think in Unicode terms; just separate encoded text from non-encoded
text, decode on the way in and encode on the way out, and all your pro-
blems will disappear.

> Can it be done per-program?

Nope.

</F>





From apardon at forel.vub.ac.be  Thu Apr 14 05:06:29 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 14 Apr 2005 09:06:29 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1793.1113334936.1799.python-list@python.org>
	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1818.1113375260.1799.python-list@python.org>
	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1823.1113383437.1799.python-list@python.org>
	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1860.1113432730.1799.python-list@python.org>
	<slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1881.1113466572.1799.python-list@python.org>
Message-ID: <slrnd5sckl.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-14, Robert Kern schreef <rkern at ucsd.edu>:
> Antoon Pardon wrote:
>> Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>> 
>> I would do that if I were just writing code I thought others could
>> find usefull. I then would feel no problem "burdening" those users
>> with the same kind of license I found in the product I took some
>> code from. But I also think that readers of documentation should
>> be free to use any code included in any way they see fit.
>
> If they have issues with distributing code derived from Python, why are 
> they reading a Python tutorial?

Try and look it from a students viewpoint. He is learing languages,
algorithms and so on. Now he is ready to write his own program.
Chances are high that he will rely on examples from the
courses/documentation he read. It is just not practical for someone
like that to figure out all the possible different licenses under
which he can use the examples from the various documenation sources.

Now if this documentation refers to code from yet another source
with its own license, using it becomes an utter nightmare for
the student, because now he has to figure out which piece of
the code is original from the author of the documentation and
which was copied from the other source.

Consideration like this, let me come to the conclusion that
code included with documentation should come with no strings
attached for the students to reuse.

-- 
Antoon Pardon


From mal at egenix.com  Mon Apr 18 12:45:44 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Mon, 18 Apr 2005 18:45:44 +0200
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <1113779479.783895.283580@g14g2000cwa.googlegroups.com>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>	<mailman.1957.1113568143.1799.python-list@python.org>	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>	<42603197.9090002@egenix.com>	<mailman.1988.1113604089.1799.python-list@python.org>	<4260ff70$0$7511$79c14f64@nan-newsreader-07.noos.net>
	<1113779479.783895.283580@g14g2000cwa.googlegroups.com>
Message-ID: <4263E438.90707@egenix.com>

Peter Herndon wrote:
> :) Knock away, as my info isn't scientific anyway.  In my case, ASA is
> *not* local.  The db is running on a 500MHz x 2 server with 768MB RAM,
> over 100BaseT connection.  That same server is also running the MSSQL
> instance, and IIS.
> 
> Running your benchmark, I ran into a couple of interesting points.
> Using mx.ODBC, my times were 0.54 seconds and 6.56 seconds
> respectively, while using adodbapi my results are 3.55 seconds and 25.9
> seconds respectively.  mx.ODBC is faster with the simple query you
> provide.
> 
> Next I modified the benchmark to reflect my particular circumstances
> more accurately (?Maybe?  Comments invited).  I changed the query to
> one of the queries in regular use in my application.  This query
> selects 26 columns from 3 joined tables, with a where clause "where
> f476 = ?", and I provide the missing value as a tuple in the execute
> statement.  Note that, as I mentioned in my reply to M-A, the f476
> field is not indexed, and is a long varchar.  Again, the system is
> bought, so I have no control over the schema. ;)
> 
> The other change I made was to reduce the number of iterations from 100
> to 10.  Since there are 128000 records in the main table, the wait for
> 100 iterations was too long for my patience.  Under these
> circumstances, mx.ODBC's numbers are 188.49 seconds and 377.56 seconds
> respectively, and adodbapi's times are 111.15 seconds and 223.55
> seconds respectively.

Just curious: are you timing just the time it takes to
complete the .execute() or do you also fetch the complete
result or only part of it ?

Note that we have had reports about MS SQL Server being very
slow in determining the number of rows in a result set. It's
possible that ASA has the same problem.

The mxODBC 2.0 release fetches this number after every .execute().
If adodbapi avoids this (which we'll also integrate into mxODBC 2.1),
then this would explain the differences you see.

Another reason could indeed be related to the longvarchar
field: these fields are fetched in multiple chunks if the
ODBC driver doesn't provide proper size information - each
of these chunks will require a network access which slows
down the data fetching.

Since mxODBC supports Unicode, but defaults to returning
8-bit strings, it is also possible that your longvarchar
column is sent as Unicode and has to be converted to
an 8-bit string first. Thus, allowing mxODBC to return Unicode
could make a difference as well (see the docs on how this is
done).

> My first wall-clock impressions are obvious exaggerations of reality,
> for which I duly apologize to all.  However, adodbapi did prove to be
> faster in my admittedly very wacky common use case.  Slower to connect,
> but faster to run a substantial query.
> 
> Comments?  Questions?  Suggestions for improvement?

See some of the hints I mentioned above.

Note that it often also pay off checking the ODBC driver
settings, esp. if you have a networked setup - ODBC drivers
often pre-fetch result sets and changing the defaults they
use for this can make a huge difference in response times.

Unfortunately, mxODBC doesn't have control over these
settings and there's no standard for them, so you'll
have to check the ODBC driver documentation for details
on the best settings can be found and set.

Regards,
-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 18 2005)
 >>> Python/Zope Consulting and Support ...        http://www.egenix.com/
 >>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
 >>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From sarapythonlist at yahoo.com  Sat Apr 30 06:35:58 2005
From: sarapythonlist at yahoo.com (Sara Khalatbari)
Date: Sat, 30 Apr 2005 03:35:58 -0700 (PDT)
Subject: How to run a program?
Message-ID: <20050430103558.52058.qmail@web61102.mail.yahoo.com>

I'm writing a code that checks the header of .po file
for syntax errors. I want this program to run
msgfmt.py on the .po file first & then the rest.

How can you write a code that runs another program in
itself?

:),
Sara

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From ruach at chpc.utah.edu  Fri Apr  8 14:19:16 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 12:19:16 -0600
Subject: Can dictionary values access their keys?
In-Reply-To: <mailman.1555.1112983423.1799.python-list@python.org>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>	<mailman.1544.1112978919.1799.python-list@python.org>	<d36fp0$suk$1@vegh.ks.cc.utah.edu>
	<mailman.1555.1112983423.1799.python-list@python.org>
Message-ID: <d36hv6$51$1@vegh.ks.cc.utah.edu>

Steve Holden wrote:

> I think that since each Datapoint appears to be unique, the simplest
> thing to do is to include a reference to the parent object as an
> attribute of the datapoint. Presumably when you create the Datapoint you
> already know which Device and Mib it's going to be stored in, so why
> make work for yourself when you can trade a little storage and make the
> whole thing easy?
>

I'll give that a shot and see how it goes. It makes sense, the parent
objects create the child objects, so they could very easily set the
apropriate parameter.

On the other hand, the introspecitve stuff is cool! When you say "make
more work for yourself" are you talking about 400 lines of code or 50.
Further, is there much processing required to do the magic? When python
do introspective magic, is it memory intensive? by that I mean does it
have to make copies of the objects to do the look-ups?

I don't mind copying the info like you suggest, but if the extra work
won't take more than a day or two, (or maybe even a week if its fun) I'd
like to do the introspection so that 1: I know how, 2: I can say that I
did ;)

Is there any kind of documentaion, (refference, article, blog-post,
tutorial), that explains introspection in useful detail, or at least
enough to get me started?

> You might also be interested to know that the Python Software Foundation
> funded the development of a Python package to support SNMP as a part of
> its first round of grant funding last year, so there's at least one
> other person working on this stuff!
> 
I did see that and I was quite pleased! :) I am currently using the
authors 'old' pysnmp which gets me by, but I am very excited to try out
the new version when it is ready.


Thanks again, for the reply and for the grant to pysnmp!

-Matthew


From ville at spammers.com  Wed Apr  6 03:03:30 2005
From: ville at spammers.com (Ville Vainio)
Date: 06 Apr 2005 10:03:30 +0300
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net> <1112456559.835048@yasure>
	<424edf02@nntp0.pdx.net> <Qb_3e.134003$dP1.471291@newsc.telia.net>
Message-ID: <du7vf70gzel.fsf@mozart.cc.tut.fi>

>>>>> "Sunnan" == Sunnan  <sunnan at handgranat.org> writes:

    Sunnan> languages". I'm not sure whether I'd consider python
    Sunnan> particularly terse, though, but I don't know enough about
    Sunnan> it yet. (I've read a

Read up on list comprehensions and generator expressions. You'll see
the terse side of Python (and genexps look kinda poetic too ;-).

-- 
Ville Vainio   http://tinyurl.com/2prnb


From farcepest at gmail.com  Mon Apr 11 10:52:53 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 11 Apr 2005 07:52:53 -0700
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
Message-ID: <1113231173.277597.226710@g14g2000cwa.googlegroups.com>

Pierre-Fr?d?ric Caillaud wrote:
> > MySQL is an excellent option is very well documented.  It is also a
> > defacto standard for OpenSource databases.
>
> 	MySQL sucks for anything but very very basic stuff as it supports no

> transactions,

Transactions available since 3.23.17 (June 2000)

> foreign keys,

Foreign keys available since 3.23.44 (Oct 2001)

> procedures,

Stored procedures available since 5.0 (5.0.3 is the current beta)

> triggers,

Triggers available since 5.0.2

> concurrency, etc.

Who knows what *this* means. Anyone who thinks MySQL can't handle
multiple concurrent connections is clearly delusional or ignorant.

> 	Postgresql is a lot better, free, and the psycopg adapter for
Postgres is
> *very very* fast (a lot faster than the MySQL one) and it has a
> dictfetchall() method which is worth its weight in donuts !

Postgresql is also a fine database. But note that MySQLdb (the Python
adapter) also has an equivalent mechanism for returning rows as
dictionaries. As for speed: I don't do any benchmarking, but there
should be no substantial speed differences between the two interfaces.



From grig.gheorghiu at gmail.com  Sat Apr  2 18:54:46 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 2 Apr 2005 15:54:46 -0800
Subject: testing -- what to do for testing code with behaviour dependant
	upon which files exist?
References: <mailman.1245.1112473860.1799.python-list@python.org>
Message-ID: <1112486085.991675.294870@o13g2000cwo.googlegroups.com>

Can't you use the tempfile module to generate unique names for
non-existent files and directories? Take a look at
http://www.python.org/doc/lib/module-tempfile.html -- it works on all
supported platforms.

Grig



From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 24 10:30:13 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 24 Apr 2005 16:30:13 +0200
Subject: Question on metaclasses
In-Reply-To: <d4gajc$oi8$05$2@news.t-online.com>
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
	<d4gajc$oi8$05$2@news.t-online.com>
Message-ID: <3d1ovcF6ni178U2@individual.net>

Diez B. Roggisch wrote:
>> class Foo(type):
>>     def __new__(cls, name, bases, dict):
>> 
>>         for k,v in [(k, v) for k,v in dict.items() if callable(v)]:
>>             cls.wrap(k,v,cls.get_directives(v), dict)
>> 
>>         return super(Foo, self).__new__(self, name, bases, dict)
> 
> There is a confusion of self and cls above - rename self with cls.

And remove the first argument to __new__.

Reinhold


From hancock at anansispaceworks.com  Wed Apr 20 11:40:44 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 20 Apr 2005 10:40:44 -0500
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <200504201040.44042.hancock@anansispaceworks.com>

On Wednesday 20 April 2005 07:52 am, Antoon Pardon wrote:
> Personnaly I would like to have the choice. Sometimes I prefer to
> start at 0, sometimes at 1 and other times at -13 or +7.

Although I would classify that as a "rare use case".  So, it "ought
to be possible to do it, but not necessarily easy". Which
Python obliges you on --- you can easily create a relocatable list
class that indexes and slices anyway you see fit, e.g.:

>>> class reloc(list):
...     def __init__(self, start, contents=()):
...         self.start = start
...         for item in contents:
...             self.append(item)
...     def __getitem__(self, index):
...         if isinstance(index, slice):
...         if (not (self.start <= index.start < self.start + len(self)) or
...             not (self.start <= index.stop  < self.start + len(self))):
...             raise IndexError
...             return self.__class__.__base__.__getitem__(self, slice(index.start-self.start, index.stop-self.start, index.step))
...         else:
...         if  not (self.start <= index < self.start + len(self)):
...             raise IndexError
...             return self.__class__.__base__.__getitem__(self, index - self.start)
...
...
>>>
>>> r = reloc(-13, ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q'])
>>> r[0]
'n'
>>> r[-12]
'b'
>>> r[-13]
'a'
>>> r[-14]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 14, in __getitem__
IndexError
>>> r[0]
'n'
>>> r[3]
'q'
>>> r[4]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 14, in __getitem__
IndexError
>>>

Note that I added the IndexError to avoid the bizarre results you
get due to "negative indexing" in the list base class (now they
would change behavior at -13 instead of at 0, which is counter-
intuitive to say the least).  Better to cry foul if an index out of
range is called for in this case, because it's gotta be a bug.

What do you think, should I send it to Useless Python? ;-)

Cheers,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From Scott.Daniels at Acm.Org  Fri Apr 15 16:44:47 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 15 Apr 2005 13:44:47 -0700
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <mailman.1897.1113487849.1799.python-list@python.org>
References: <d3ekhf$a0f$1@lairds.us>
	<3c670tF6jdeqrU1@individual.net>	<lMKdnShsStt_68PfRVn-3g@powergate.ca>
	<mailman.1897.1113487849.1799.python-list@python.org>
Message-ID: <4260222e$1@nntp0.pdx.net>

Simon Brunning wrote:
> On 4/14/05, Peter Hansen <peter at engcorp.com> wrote:
> 
>>Greg Ewing wrote:
>>
>>>(Darn. I finally say something that gets into Quote of the
>>>Week, and it's attributed to someone else! :-) :-) :-)
>>
>>+1 on this for meta-QOTW, solving both problems...
> 
> 
> Yeah, but to whom do I attribute it?
> 
> ;-)
> 
Clearly to Greg.

--Scott David Daniels
Scott.Daniels at Acm.Org
(who should have said something as soon as he saw the mis-attribution)


From notarealaddress at notarealaddress.com  Tue Apr  5 10:09:27 2005
From: notarealaddress at notarealaddress.com (djo)
Date: Tue, 05 Apr 2005 10:09:27 -0400
Subject: check interpreter version before running script
In-Reply-To: <mailman.1382.1112708995.1799.python-list@python.org>
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
	<mailman.1382.1112708995.1799.python-list@python.org>
Message-ID: <d2u66n$pnb$1@courier.brandeis.edu>

Josef Meile wrote:
> What's about:
>  >>> import sys
>  >>> print sys.version_info
> (2, 1, 3, 'final', 0)

Python 1.5.2 (#1, Mar  3 2001, 01:35:43)  [GCC 2.96 20000731 (Red 
Hat Linux 7.1 2 on linux-i386
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
 >>> import sys
 >>> sys.version_info
Traceback (innermost last):
   File "<stdin>", line 1, in ?
AttributeError: version_info


...which the OP may have known, since they suggested sys.version, 
which *is* availible in pre-2.0.


My own messy solution involves a shell script installer which 
runs a 1.5-safe Python script which installs a needs-2.2 Python 
script.  But I needed an installer for other reasons.  This would 
be ugly for a single script.


djo


From uche.ogbuji at gmail.com  Sat Apr 23 15:18:47 2005
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: Sat, 23 Apr 2005 13:18:47 -0600
Subject: python modules in home dir
In-Reply-To: <mailman.1998.1113660758.1799.python-list@python.org>
References: <8416c258.0504091309.7ba2047d@posting.google.com>
	<mailman.1998.1113660758.1799.python-list@python.org>
Message-ID: <1114283927.7121.88.camel@borgia>

On Sat, 2005-04-16 at 08:12 -0600, Uche Ogbuji wrote:
> On Sat, 2005-04-09 at 14:09 -0700, dzieciou wrote:
> 
> > I'm new-comer in Python.
> > I want to install few Python modules (4Suite, RDFLib, Twisted and Racoon)
> > in my home directory, since Python installation is already installed in the
> > system
> > and I'm NOT its admin.
> > I cannot install pyvm (portable binary python machine) - have no such big
> > quota.
> > Any idea how can I solve it?
> 
> To install 4Suite in the home dir, use an incantation such as:
> 
> ./setup.py config --prefix=$HOME/lib
> ./setup.py install
> 
> Note: I expect you also installed Python in your home dir?

BTW, I expanded on this suggestion at:

http://copia.ogbuji.net/blog/2005-04-16/Installing


-- 
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Use CSS to display XML, part 2 - http://www-128.ibm.com/developerworks/edu/x-dw-x-xmlcss2-i.html
XML Output with 4Suite & AMara - http://www.xml.com/pub/a/2005/04/20/py-xml.html
Use XSLT to prepare XML for import into OpenOffice Calc - http://www.ibm.com/developerworks/xml/library/x-oocalc/
Schema standardization for top-down semantic transparency - http://www-128.ibm.com/developerworks/xml/library/x-think31.html



From mwm at mired.org  Tue Apr 26 22:47:19 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 21:47:19 -0500
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org> <86is29n9cg.fsf@guru.mired.org>
	<d4l825$mj7$1@domitilla.aioe.org>
Message-ID: <86is29kkaw.fsf@guru.mired.org>

Maurice LING <mauriceling at acm.org> writes:

>>>5. Unstable bytecodes makes updating to a newer version of Python very
>>>tedious and risk breaking old scripts, if they uses C modules.
>> Unstable bytecodes have nothing to do with these problems. The
>> current CPython installation process puts the python command and
>> the libraries for different versions in different directories. This
>> allows you to have multiple versions installed so you can keep old
>> scripts working with the old version until you've had time to test
>> them. It also makes life much easier on the developers, as they can
>> have a development version installed on the machine at the same time
>> as they have a production version without breaking the old scripts. It
>> also means you have to reinstall all your modules on the new
>> installation - which is what makes the update process tedious for me.
>> Now, this could be mitigated by having Python libraries installed in
>> the same location for all versions. You could fix all the bytecode
>> files by running compileall.py as a script. Sometimes, a module won't
>> work properly on a new version of Python, and will have to be
>> updated. You'll have to find those by trial and error and fix them as
>> you find them. You'll also have to recompile all the C modules, which
>> will break running scripts on the old interpreter.
>> Under the currewnt system, old scripts that are run by the new
>> interpreter will break if all the modules they need aren't installed
>> yet. Once they're installed, the scripts should work.
>> If you have scripts that use C modules that aren't installed in the
>> standard Python search path, they may well break on the new
>> interpreter until you recompile them. Having both versions of the
>> interpreter available makes this tolerable.
>> The cure I proposed seems worse than disease. If you've got a better
>> solution, I'm sure we'd be interested in hearing it.
>>
>
> Perhaps this is another call for Python version of CPAN (CPyAN or
> PYAN). It can be modelled after Fink or Darwinports.
>
> If I remembered correctly, Fink uses apt-get and curl.
>
> What can be done in PYAN is to encourage all 3rd party library
> developers to centralize their libraries in it, which I think all will
> gladly respond. All that is needed to be  deposited in PYAN is a
> description file, like the simplest setup.py file. All that is needed
> in this description file is
> 1. where to download the source codes (e.g. CVS)?
> 2. version number?
> 3. standard stuffs (optional) like authors, descriptions, copyright?

To copy all of what CPAN does, you need to know what other modules it
depends on, so you can automatically download those as well.

> Python can then have a built-in mechanism to read the description file
> and download the source codes and do the standard "sudo python
> setup.py install" to install the library into site-package.

I don't like this - it would make Python depend on sudo being
available. I'd rather it not do that, and let each systems
administrator issue the command according to *their* security policy.

> I think something like this can be set up for Python quite easily. I
> recall some time back, there's a long discussion about setting up
> Python's version of CPAN but I can't recall the contents of the
> discussions.

It's not clear it's easy. It's *very* clear it won't happen until
someone steps up to do it. The latter is a problem. 

>> The dependencies problem is actually pretty easy to solve. In fact,
>> in
>> many Python environments, it's already solved. On my system, if I
>> install Eric3 using the provided installation package, the
>> dependencies will be picked up automatically. Not very helpfull if
>> you're not on such a system, I know. The long-term solution is for
>> PyPI to grow to include this functionality.
>
> I must say that I do not quite understand your system. Please enlighten me.

FreeBSD has a packaging system (like fink on the Mac) called either
"Ports" (if you build from source) or "Packages" (if you install
pre-compiled binaries). I use Ports, so I'm going to talk about
them. But Packages are built from Ports, and all the information in
the port winds up in the package, so you get the same functionality
with a slightly different command set.

Basically, each port has a list of all the other ports it depends
on. When you install a port, the system will check to see if each of
the dependent ports is installed - usually by checking if a file it
should install exists - and if it doesn't, will install the dependent
port. The dependencies of that port are recursively checked. So if I
were to install the Eric3 port, it would note that I need the
qscintilla, py-sip and py-qt (ports of python modules are all named
"py-<something>"). py-sip and py-qt are already installed, so it would
skip thos. qscintilla isn't, so that would get installed. qscintilla
doesn't have any dependencies, so that would stop there. After
qscintilla is installed, eric3 would be installed.

All of this is recorded in the Packages database, and I can query that
to find out what python modules are installed, which module installed
a specific file, etc. I can also use that to cleanly remove the
module, which the python setup.py doesn't do for me.

I'm not familiar with fink, but I suspect it offers much the same
functionality. rpm's and apt-get offer that functionality for many
Linux systems. Solaris has it's own package system as well.

Basically, for common Unix platforms, the dependency problems you ran
into with Eric3 should be solved by the platforms package system,
assuming that Eric3 is available as a package.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From seberino at spawar.navy.mil  Sat Apr 23 02:49:47 2005
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 22 Apr 2005 23:49:47 -0700
Subject: WHERE tiny pylibpcap example code that just uses next()???...
Message-ID: <1114238987.731727.287020@g14g2000cwa.googlegroups.com>

I'm trying to learn pylibpcap and would //really// love to see a
**simple**
example that just works.


Can someone *please* send me any little app that just
captures packets with next() command and prints bytes received??


If it only works on loopback interface that is fine.


Thanks in advance.

        
Chris



From bokr at oz.net  Fri Apr  8 15:59:02 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 08 Apr 2005 19:59:02 GMT
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
Message-ID: <4256da25.42860089@news.oz.net>

On Fri, 08 Apr 2005 09:30:25 -0600, Matthew Thorley <ruach at chpc.utah.edu> wrote:

>This may be a very rudimentary question, but here goes:
>
>If I have a simple dictionary, where the value is a class or function,
>is there an interface through which it can discover what its key is?
>Similar to index() for list.

You can make a reverse dictionary, if the key:value pairs are unique and
the values are hashable. But I doubt this is the real solution to your real problem.

 >>> def foo(): pass
 ...
 >>> def bar(): pass
 ...
 >>> dct = dict(fookey=foo, barkey=bar)
 >>> dct
 {'barkey': <function bar at 0x0301410C>, 'fookey': <function foo at 0x03014064>}
 >>> revdict = dict((v,k) for k,v in dct.items())
 >>> revdict[foo]
 'fookey'
 >>> revdict[bar]
 'barkey'
 >>> class Baz(object): pass
 ...
 >>> dct['bazkey'] = Baz
 >>> dct
 {'barkey': <function bar at 0x0301410C>, 'fookey': <function foo at 0x03014064>, 'bazkey': <class '__main__.Baz'>}
 >>> revdict = dict((v,k) for k,v in dct.items())
 >>> revdict[Baz]
 'bazkey'


But if you had

    d = {'key1':foo, 'key2':foo}

What would foo's key be?

>
>For a list, assuming I new what the parent list was I could do something
>like this.
>
>>>> class child:
>...     def get_parent_index(self, parent):
>...             return parent.index(self)
>...
>>>> a = child()
>>>> l = [a]
>>>> b = l[0]
>>>> b.get_parent_index(a)
>>>> b.get_parent_index(l)
>0
>
>Is there a way to do something like that with dicts?
>
>
>On a similar note, if one object is part of another, is there a way for
>the 'child' obj to discover what/who the 'parent' object is? That way
>parent does not have to be explicityly passed to get_parent_index?
>
Any number of "parents" can refer to a given obj, so even if you
have a context where you can search successfully, you may find many "parents"
-- unless you can guarantee 1:1 as in the dct/revdict example above.

>The idea is like this:
>
>>>> class child:
>...     def get_parent_index(self):
>		parent = self.magic_parent_discovery()
>...             return parent.index(self)
>...
>
I would suggest thinking about defining a class for the graph you are concerned with
and giving it methods to add children to nodes, and automatically maintain the
parent references as you walk your graph and add or delete nodes. Then you should
easily be able to define more methods to get various info as you may want.
Properties may interest you too, giving you a way to convert plain object attributes
to dynamically computed attributes without chaninging the code that refers to the attribute.

Unless you have a huge graph, I wouldn't worry about the space. If you bump into
limitations, try __slots__ for node attributes. But if you know now that it's going
to be huge, describe your (real) problem now for better help.

Regards,
Bengt Richter


From simon.brunning at gmail.com  Wed Apr 20 06:12:03 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 11:12:03 +0100
Subject: goto statement
In-Reply-To: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
Message-ID: <8c7f10c6050420031238ecc69a@mail.gmail.com>

On 4/20/05, praba kar <prabapython at yahoo.co.in> wrote:
>    In Python what is equivalent to goto statement

http://docs.python.org/tut/node6.html

See, it's those dratted node numbers again. ;-)

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From programmer.py at gmail.com  Thu Apr 21 08:49:35 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Thu, 21 Apr 2005 07:49:35 -0500
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
In-Reply-To: <42664586.72bb1041.7977.4be7SMTPIN_ADDED@mx.gmail.com>
References: <42664586.72bb1041.7977.4be7SMTPIN_ADDED@mx.gmail.com>
Message-ID: <d52c72d205042105495c2b3dae@mail.gmail.com>

If you're really desperate, write a python script that changes ->

#include "python.h"

to

#ifdef _DEBUG
 #undef _DEBUG
 #include "python.h"
 #define _DEBUG
#else
 #include "python.h"
#endif

Then run the script each time you generate a new wrapper file and
everything ought to be OK.

jw

On 4/20/05, Bill Davy <Bill at synectixltd.com> wrote:
> Hi Jaime,
> 
> SWIG-1.3.24/Lib/python/python.swg does not have the [#include "python.h"]
> but has lots of Pythonesque includes but all *.swg
> Still, I am hoping I can make MSVC6 do some of the work of putting things in
> the right place for Release and Debug builds.
> 
> Rgds,
>         Bill.
> 
> "Jaime Wyant" <programmer.py at gmail.com> wrote in message
> news:<mailman.2108.1113922028.1799.python-list at python.org>...
> I fight the python24_d.lib problem with swig daily.  The way I got
> around it was to modify swig's python configuration module.  Mine was
> located at
> 
> /lib/swig1.3/python/python.swg
> 
> (I'm using cygwin)
> 
> At the top, I changed
> 
> #include "python.h"
> 
> to
> 
> #ifdef _DEBUG
>   #undef _DEBUG
>   #include "python.h"
>   #define _DEBUG
> #else
>   #include "python.h"
> #endif
> 
> Somewhere in the includes, python uses a pragma telling the MSVC
> compiler which library to link the object files against.  Because
> you're building a _DEBUG build, you magically get the python24_d.lib
> library.
> 
> hth,
> jw
> 
> On 4/18/05, Bill Davy <Bill at synectixltd.com> wrote:
> > I downlaoded and installed
> > http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
> >
> > I'm trying to build an extension using SWIG 1.3.24 and the linker needs
> > python24_d.lib (I do not have the DLL either).  I've not found it in any
> of
> > the
> > downloads.
> >
> > So I tried to download the source to build it myself.  Of
> > http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tar.bz2 and
> > http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz, WinZip (9.0 SR1)
> > just says "Error reading header after processing 0 entries".
> >
> > Additionally, I've had no joy downloading the unzipper
> > (ftp://sources.redhat.com/pub/bzip2/v102/bzip2-102-x86-win32.exe) from the
> > site cited for the unzipper (http://sources.redhat.com/bzip2/).  It
> flashed
> > up a
> > black console window momentarily.
> >
> > Oh, this is sooooo frustrating! :-(
> >
> > Can anyone point me in the right direction?
> >
> > And then I can get to grips with my work.
> >
> > tia
> >     Bill
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> ----------
> 
>


From bokr at oz.net  Sat Apr 16 21:44:26 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 01:44:26 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<mailman.1993.1113618726.1799.python-list@python.org>
	<4260b4e3.65280488@news.oz.net>
	<Pine.A41.4.61b.0504161346440.72462@dante72.u.washington.edu>
Message-ID: <4261badb.132344411@news.oz.net>

On Sat, 16 Apr 2005 14:02:32 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:

>Bengt Richter wrote:
>> On Fri, 15 Apr 2005 19:32:02 -0700, James Stroud <jstroud at mbi.ucla.edu> wrote:
>>>> Examples
>>>> ========
>>>>
>>>> Using suite-based keyword arguments, the code
>>>>
>>>> f(x = 1)
>>>>
>>>> is equivalent to
>>>>
>>>> f():
>>>>     x = 1
>>
>>   f(**def():
>>         x = 1
>>         return vars())
>
>Yes, it seems it would just be sugar for full lambdas.  Although, in this 
>example and the others, wouldn't you have to actually call the anonymous 
>function?
D'oh, yes, but you got the idea ;-)
>
>f(**(def():
> 	x = 1
> 	return vars())())
>
>Otherwise it seems like you are trying to pass a function, not the 
>keywords the function returns.
>
>One could, of course, also do the same with a named function:
>
>def no_longer_anonymous():
> 	x = 1
> 	return vars()
>
>f(**no_longer_anonymous())

Yes, but that does away with the trailing suite definition of the bindings from the pov of f ;-)

BTW, I hope you will read my latest post replying to Kay Schluehr, where I propose some different
spellings ;-)

    f():
        x = 1

would be spelled

    f(**kw) where:
        kw = dict(::
            x = 1)

or could also be

    f(x=x) where:
        x = 1

"::" is a unary suite operator that returns an ordered vars().items() representing the net bindings made
in the suite (i.e. del <name> will remove a binding just as for vars()). ::<suite> is a first class expression.

    items = ::
        x = 1
        y = 2
    print items => (('x', 1), ('y', 2))

"where:" is an expression trailer introducing a suite like :: except that the bindings are used to evaluate
the names in the expression that the "where:" trails, not to produce an items() tuple.

See the other post replying to Kay for more, superseding some things in my reply to you ;-)

Regards,
Bengt Richter


From fredrik at pythonware.com  Mon Apr 11 03:06:17 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 09:06:17 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de><mailman.1647.1113160640.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de><d3c88t$r27$1@sea.gmane.org>
	<d3d0l5$8s1$1@sea.gmane.org>
Message-ID: <d3d7ft$ljg$1@sea.gmane.org>

Robert Kern wrote:

>> (the Linux distributors know how to do this: look for good stuff that's
>> either actively maintained or simple and solid enough to live for a while,
>> make sure the licenses are good enough, bundle the latest and greatest
>> version, ship tested versions at regular intervals, update when necessary,
>> and pass bugs and patches upstream.  why not use the same approach
>> for Python's standard distribution?)
>
> The reason they don't is because making a distribution like this is a royal pain in the ass. It 
> makes no sense to make the Python standard distribution like this. Only insane people do this. I'm 
> one of them.

with enough volunteers, and a distributed development environment, nobody
needs to be insane.  if you try to channel everything through a small number of
CPython developers, everyone will loose their sanity, and the users will suffer.

> "Updating when necessary" is problematic and really requires proper package management. Python is 
> not an OS and cannot control all of the little factors that make package management feasible for 
> OS distributions to do.

"updating when necessary" means "adding new components to the standard library
when there are new stable releases available, and someone has time to run the test
suite and contact the upstream provider if necessary".

> What's more, once you *do* have proper package management on the platforms that you care about, it 
> doesn't matter what is or isn't in the standard distribution.

which means that at the moment, the best way to get a Python module into the
hands of users is to 1) provide windows installers that are compatible with the
"official" distribution, and 2) make it easy for downstream providers to package
your stuff, and leave it to them to take care of the rest.

but if the library in the standard distribution doesn't really matter, it should be
stripped down to minimum, to avoid overloading the CPython maintainers.

</F> 





From could.net at gmail.com  Mon Apr  4 21:12:17 2005
From: could.net at gmail.com (could ildg)
Date: Tue, 5 Apr 2005 09:12:17 +0800
Subject: How to merge two binary files into one?
Message-ID: <311b5ce105040418124c3d45f1@mail.gmail.com>

I want to merge file A and file B into a new file C,
All of them are binary.
How to do that?
thanks a lot.
-- 
????????????????????
????????????????
????????


From ugo_digirolamo at InVision.iip.com  Tue Apr 26 03:39:07 2005
From: ugo_digirolamo at InVision.iip.com (ugodiggi)
Date: 26 Apr 2005 00:39:07 -0700
Subject: Problem with embedded python
Message-ID: <1114501147.717220.117160@f14g2000cwb.googlegroups.com>

I have the following code, that seems to make sense to me.

However, it crashes about 1/3 of the times.

My platform is Python 2.4.1 on WXP (I tried the release version from
the msi and the debug version built by me, both downloaded today to
have the latest version).

The crash happens while the main thread is in Py_Finalize.
I traced the crash to _Py_ForgetReference(op) in object.c at line 1847,
where I have op->_ob_prev == NULL.

What am I doing wrong? I'm definitely not too sure about the way I'm
handling the GIL.

Thanks in adv for any suggestion

Cheers and ciao

Ugo

////////////////////////// TestPyThreads.py //////////////////////////
#include <windows.h>
#include "Python.h"

int main()
{
	PyEval_InitThreads();
	Py_Initialize();
	PyGILState_STATE main_restore_state = PyGILState_UNLOCKED;
	PyGILState_Release(main_restore_state);

	// start the thread
	{
		PyGILState_STATE state = PyGILState_Ensure();
		int trash = PyRun_SimpleString(
				"import thread\n"
				"import time\n"
				"def foo():\n"
				"  f = open('pippo.out', 'w', 0)\n"
				"  i = 0;\n"
				"  while 1:\n"
				"    f.write('%d\\n'%i)\n"
				"    time.sleep(0.01)\n"
				"    i += 1\n"
				"t = thread.start_new_thread(foo, ())\n"
				);
		PyGILState_Release(state);
	}

	// wait 300 ms
	Sleep(300);

	PyGILState_Ensure();
	Py_Finalize();
	return 0;
}



From petite.abeille at gmail.com  Thu Apr 21 09:26:37 2005
From: petite.abeille at gmail.com (PA)
Date: Thu, 21 Apr 2005 15:26:37 +0200
Subject: Private class?
In-Reply-To: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
References: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
Message-ID: <e7c433e98c43e5ce0d7b2d8b72c66f1f@gmail.com>


On Apr 21, 2005, at 15:13, codecraig wrote:

> ...so that is what I am thinking.  However, i guess my issue is how to
> make EventBus a singleton or prevent it from being instaniated and
> making it's methods statically accessible.

Not directly related to your question, but... you may want to take a  
look at NSNotification & Co. for, er, inspiration :)

"Introduction to Notifications"
http://developer.apple.com/documentation/Cocoa/Conceptual/ 
Notifications/index.html

Here is a -gasp- Java implementation as well:

http://dev.alt.textdrive.com/file/ZOE/Frameworks/SZFoundation/ 
SZNotification.java

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From Daniel.Cer at gmail.com  Sun Apr 24 21:46:52 2005
From: Daniel.Cer at gmail.com (Daniel Cer)
Date: Sun, 24 Apr 2005 19:46:52 -0600
Subject: pygtk and long running process
In-Reply-To: <426C406F.2070702@gmail.com>
References: <pan.2005.04.25.10.17.03.869604@gmail.com>
	<426C406F.2070702@gmail.com>
Message-ID: <426C4C0C.9070609@gmail.com>

Daniel Cer wrote:
> Robert wrote:
> 
>> I have a command line app that can take up to 20 minutes to complete and
>> every minute or so updates it's status (spits it out to console).  I am
>> writing a front end for this app in python/gtk and was wondering what
>> command I use to a) invoke the command and b) how to capture it's out put
>> and for instance update a text box.
> 
> 
> os.popen() will probably do what you want.
> 
> e.g.:

(....)

As for the latter part of (b)....

I don't know much about pygtk, but I imagine you should be able to put 
the code that monitors the external program in a thread, and then 
whenever you get some new status information update the text box.

-Dan


From john at hazen.net  Thu Apr 14 20:57:23 2005
From: john at hazen.net (John Hazen)
Date: Thu, 14 Apr 2005 17:57:23 -0700
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <425E8658.8020300@pythonapocrypha.com>
References: <d3ekhf$a0f$1@lairds.us>
	<ssv7e.64636$tE2.4675635@phobos.telenet-ops.be>
	<425E8658.8020300@pythonapocrypha.com>
Message-ID: <20050415005723.GB3547@gate2.hazen.net>

* Dave Brueck <dave at pythonapocrypha.com> [2005-04-14 07:49]:
[Roel Schroeven]
> >Not that it really matters, but does anybody know why the weekly Python
> >news always arrives twice? Does it only happen to me, or does it happen
> >to others too?
> >
> >It's not that it irritates me or anything, I'm just being curious.

[Dave Brueck]
> I just thought it was for emphasis.

My theory has always been that it's posted once to python-list, and once
to usenet, and the bridge dutifully sends each message to the other
domain.

(And, yes.  (Obviously) I get two copies, as well.  I've meen meaning to
ask the same question.)

-John


From martin at v.loewis.de  Sun Apr 10 13:11:25 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 10 Apr 2005 19:11:25 +0200
Subject: Thoughts on some stdlib modules
In-Reply-To: <mailman.1634.1113131893.1799.python-list@python.org>
References: <mailman.1524.1112951803.1799.python-list@python.org><ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com><mailman.1603.1113027761.1799.python-list@python.org>	<1113121254.874488.111250@f14g2000cwb.googlegroups.com>
	<mailman.1634.1113131893.1799.python-list@python.org>
Message-ID: <42595E3D.7080301@v.loewis.de>

Fredrik Lundh wrote:
> if I were in charge

Would you like to be?

Regards,
Martin


From dmj111.9352919 at bloglines.com  Sat Apr  9 09:53:36 2005
From: dmj111.9352919 at bloglines.com (David Jones)
Date: Sat, 09 Apr 2005 09:53:36 -0400
Subject: Python extension performance
In-Reply-To: <mailman.1597.1113016643.1799.python-list@python.org>
References: <WqydncT1Hq80p8rfRVn-2w@adelphia.com>
	<mailman.1597.1113016643.1799.python-list@python.org>
Message-ID: <s96dnXEyet74Q8rfRVn-qg@adelphia.com>

Jack Diederich wrote:

> On Fri, Apr 08, 2005 at 10:14:52PM -0400, David Jones wrote:
> 
>>I am trying to hunt down the difference in performance between some raw 
>>C++ code and calling the C++ code from Python.  My goal is to use Python 
>>to control a bunch of number crunching code, and I need to show that 
>>this will not incur a (big) performance hit.
>>
>>My C++ function (testfunction) runs in 2.9 seconds when called from a 
>>C++ program, but runs in 4.3 seconds when called from Python. 
>>testfunction calculates its own running time with calls to clock(), and 
>>this is for only one iteration, so none of the time is in the SWIG code 
>>or Python.
>>
>>Some potential causes of my problems:
>>
>>- linking to a shared library instead building a static exe.
>>- intel libraries are not being used when I think they are
>>- libpython.so was built with gcc, so I am getting some link issues
>>- can linking to python affect my memory allocation and deallocation in 
>>c++??
> 
> The main overhead of calling C/C++ from python is the function call overhead
> (python creating the stack frame for the call, and then changing the python
> objects into regular ints, char *, etc).  You don't mention how many times
> you are calling the function.  If it is only once and the difference is 1.4
> seconds then something is really, really, messed up.  So I'll guess it is
> hundreds of thousands of times?  Let us know.

Sorry I was not clearer above;  the function is only called one time.  I 
have run out of obvious things I may have screwed up.  The part that 
bugs me most is that these are built from the same .o files except for 
the .o file that has the wrapper function for python.

> 
>>Some things I can try:
>>- recompile python with the intel compiler and try again
>>- compile my extension into a python interpreter, statically
>>- segregate the memory allocations from the numerical work and compare 
>>how the C++ and Python versions compare
> 
> Recompiling with the Intel compiler might help, I hear it is faster than 
> GCC for all modern x86 platforms.  I think CPython is only tested on GCC
> and windows Visual-C-thingy so you might be SOL.  The other two ideas
> seem much harder to do and less likely to show an improvement.
 >
 > -jackdied
 >

By the second option, I meant to compile my extension statically instead 
of using a shared library by unpacking the source rpm and putting my 
code in the Modules/ directory.  That is a pretty standard thing to do, 
isn't it?


Thanks for the comments.

Dave




From theller at python.net  Wed Apr  6 14:28:01 2005
From: theller at python.net (Thomas Heller)
Date: Wed, 06 Apr 2005 20:28:01 +0200
Subject: Problem with access to shared memory(W2K) / ORIGINALLY (win32)
 speedfan api control
References: <3bilaqF6in0icU1@individual.net>
Message-ID: <hdijzrny.fsf@python.net>

"Claudio Grondi" <claudio.grondi at freenet.de> writes:

> Background information:
> ---------------------------------
> in order to monitor mainboard sensory data
> as fan speeds, temperatures, applications
> like SpeedFan http://www.almico.com/speedfan.php
> or MBM http://mbm.livewiredev.com/
> can be used.
> Both of the mentioned apps expose data got
> from the hardware in a shared memory area.
>
> The goal to achieve:
> ---------------------------
> is to supervise the motherboard sensory
> data from within a Python script
>
> The approach:
> -------------------
> access to the shared memory area
> exposed by motherboard hardware
> querying apps from Python script.

For the mistake you made see below, hope that helps.

For the general way to solve this problem you should know that you can
access a shared memory area with a certain name also with Python's mmap
module, although that is probably not documented very good.  There was a
recipe posted a few days ago which showed different ways to acces shared
memory, with or without ctypes.

> The problem:
> -----------------
> the below listed script code returns
> always same values, what
> leads to the conclusion, that something
> is going wrong.
>
> Can anyone help?
>
> Thanks in advance
>
> Claudio
>
> The code
> -------------
>   I use is provided also here:
>  http://www.codecomments.com/Python/message430495.html
>  http://mail.python.org/pipermail/python-list/2005-March/271853.html
> (the mmap part of it doesn't work at all)
>
> from ctypes import *
>
> class Buffer(Structure):
>   # just to see if any useful data can be acquired
>   _fields_ = [
>     ("Data0", c_longlong)
>    ,("Data1", c_longlong)
>    ,("Data2", c_longlong)
>    ,("Data3", c_longlong)
>    ,("Data4", c_longlong)
>    ,("Data5", c_longlong)
>    ,("Data6", c_longlong)
>    ,("Data7", c_longlong)
>    ,("Data8", c_longlong)
>    ,("Data9", c_longlong)
>    ,("DataA", c_longlong)
>    ,("DataB", c_longlong)
>    ,("DataC", c_longlong)
>    ,("DataD", c_longlong)
>    ,("DataE", c_longlong)
>    ,("DataF", c_longlong)
>   ]
>
> szName = c_char_p("SFSharedMemory_ALM")  # SpeedFan
> szName = c_char_p("$M$B$M$5$S$D$")    # MBM
> # szName = c_char_p("blabla")  # not existing shared memory
>
> FILE_MAP_ALL_ACCESS  = 0xF001F
> FALSE = 0
>
> hMapObject = windll.kernel32.OpenFileMappingA(
>    FILE_MAP_ALL_ACCESS
>   ,FALSE
>   ,szName
> )
> if (hMapObject == 0):
>   print "Could not open file mapping object"
>   raise WinError()
>
> pBuf = windll.kernel32.MapViewOfFile(
>      hMapObject
>     ,FILE_MAP_ALL_ACCESS
>     ,0
>     ,0
>     ,0
> )
>
>   if (pBuf == 0):
>     print "Could not map view of file"
>     raise WinError()
>   else:
>     print repr(pBuf)
>     print repr(hMapObject)
>
>     pBuf_str = cast(pBuf, c_char_p)
>     print repr(pBuf_str.value)
>     print repr(pBuf_str)
>
>     pBuf_buf = cast(pBuf, Buffer)
Here's the problem.  pBuf is a pointer to a Buffer structure, not the
buffer structure itself.
Something like
    pBuf_buf = Buffer.from_address(pBuf)
may work.

Thomas


From phil_nospam_schmidt at yahoo.com  Fri Apr 22 15:03:57 2005
From: phil_nospam_schmidt at yahoo.com (phil_nospam_schmidt at yahoo.com)
Date: 22 Apr 2005 12:03:57 -0700
Subject: How to prevent Tkinter frame resize?
In-Reply-To: <mailman.2279.1114163951.1799.python-list@python.org>
References: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
	<mailman.2279.1114163951.1799.python-list@python.org>
Message-ID: <1114196637.488666.93640@l41g2000cwc.googlegroups.com>

I've tried this, but it still doesn't work. At this point I suspect
that the problem is not with the resizing of the frame, but of the
toplevel widget in which the frame lives. I've been tinkering with
that, but still without success.



From jhargraveiii at msn.com  Fri Apr  8 00:11:21 2005
From: jhargraveiii at msn.com (Jim Hargrave)
Date: Fri, 08 Apr 2005 00:11:21 -0400
Subject: [JIM_SPAM] Microsoft supporting a .NET version of Python...
Message-ID: <42560469.8000104@msn.com>

http://www.gotdotnet.com/workspaces/workspace.aspx?id=ad7acff7-ab1e-4bcb-99c0-57ac5a3a9742


From listspam at flowtheory.net  Mon Apr 11 11:00:24 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Mon, 11 Apr 2005 09:00:24 -0600
Subject: [Pythonmac-SIG] Fwd: PPC OSX vs. x86 Linux
In-Reply-To: <098bafc67df0f515aaf81aa4b7cc4c31@flowtheory.net>
References: <f8a9d419c58e4458e7c4dea6f4d4607f@flowtheory.net>
	<066c2653d9042a2903532e502b928cfc@redivi.com>
	<098bafc67df0f515aaf81aa4b7cc4c31@flowtheory.net>
Message-ID: <c371ef077af40f7b79580cb74e172f47@flowtheory.net>

Well, I compiled a fresh version of Python 2.3.5 from python.org to 
test the datetime theory... and I'm still getting 150sec execution 
times. :-/ I'm gonna test the string vs. strop now...

-jag


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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 10, 2005, at 4:19 PM, Joshua Ginsberg wrote:

> I'll give that a shot. I'm interested to hear that -- I'm only using a 
> single use of time.strptime in the code, but I somehow am skeptical 
> that would create a 25-fold performance hit. :-)
>
> -jag
>
> <Pasted Graphic.tiff>
> Joshua Ginsberg -- joshg at brainstorminternet.net
> Brainstorm Internet Network Operations
> 970-247-1442 x131
> On Apr 10, 2005, at 4:14 PM, Bob Ippolito wrote:
>
>>
>> On Apr 10, 2005, at 2:46 PM, Joshua Ginsberg wrote:
>>
>>>> I writing some python code to do some analysis of my mail logs. I 
>>>> took a 10,000 line snippet from them (the files are about 5-6 
>>>> million usually) to test my code with. I'm developing it on a 
>>>> Powerbook G4 1.2GHz with 1.25GB of RAM and the Apple distributed 
>>>> Python* and I tested my code on the 10,000 line snippet. It took 2 
>>>> minutes and 10 seconds to process that snippet. Way too slow -- I'd 
>>>> be looking at about 20 hours to process a single daily log file.
>>>>
>>>> Just for fun, I copied the same code and the same log snippet to a 
>>>> dual-proc P3 500MHz machine running Fedora Core 2* with 1GB of RAM 
>>>> and tested it there. This machine provides web services and domain 
>>>> control for my network, so it's moderately utilized. The same code 
>>>> took six seconds to execute.
>>>>
>>>> Granted I've got the GUI and all of that bogging down my Mac. 
>>>> However, I had nothing else fighting for CPU cycles and 700MB of 
>>>> RAM free when my testing was done. Even still, what would account 
>>>> for such a wide, wide, wide variation in the time required to 
>>>> process the data file? The code is 90% regular expressions and 
>>>> string finds.
>>>>
>>>> * versions are:
>>>> Python 2.3 (#1, Sep 13 2003, 00:49:11)
>>>> [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
>>>> and
>>>> Python 2.3.3 (#1, May  7 2004, 10:31:40)
>>>> [GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
>>
>> Try it with a newer version of Python on Mac OS X.  I had a similar 
>> problem, and it turned out to be Python 2.3.0's fault.  Specifically, 
>> the implementation of the datetime module's parser was really, 
>> really, really stupid and slow in early versions of Python 2.3.
>>
>> -bob
>>

From rockon02 at senet.com.au  Mon Apr 18 05:49:22 2005
From: rockon02 at senet.com.au (Mike brown)
Date: Mon, 18 Apr 2005 19:49:22 +1000
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven wh
References: <1113707535.383715.327170@g14g2000cwa.googlegroups.com>
	<rzl8e.7988$sp3.2080@newsread3.news.atl.earthlink.net>
	<1113806696.907908.323410@g14g2000cwa.googlegroups.com>
Message-ID: <rockon02-1804051949220001@1cust237.tnt5.adl1.da.uu.net>

In article <1113806696.907908.323410 at g14g2000cwa.googlegroups.com>,
"thesonoftruth" <thesonoftruth at aol.com> wrote:

> I wonder if anyone yells VISHNU !!  VISHNUUUUUUUUUUUUU !  when making
> out,


I might have.

It's been so long that I've forgotten.

MJRB


From dbasch at yahoo.com  Wed Apr 27 13:57:15 2005
From: dbasch at yahoo.com (Derek Basch)
Date: 27 Apr 2005 10:57:15 -0700
Subject: List comprehension and FieldStorage
In-Reply-To: <1114552736.288675.248070@g14g2000cwa.googlegroups.com>
References: <1114552736.288675.248070@g14g2000cwa.googlegroups.com>
Message-ID: <1114624635.234561.96390@o13g2000cwo.googlegroups.com>

bump



From exarkun at divmod.com  Fri Apr 22 14:26:52 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Fri, 22 Apr 2005 18:26:52 GMT
Subject: Threading question
In-Reply-To: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>
Message-ID: <20050422182652.10340.1377819636.divmod.quotient.18750@ohm>

On 22 Apr 2005 11:14:48 -0700, codecraig <codecraig at gmail.com> wrote:
>If i have a class such as
>
>class Foo:
>    def doSomething(self, cmd, cmd2, callback):
>        cmd = <translate command>
>        results = <..do some possibly long task..>
>        callback(results)
>
>What I am looking to do is have that "long task" done in a separate
>thread...how can I do this?
>
>I was thinking..
>
>class MyThread(Thread):
>    def __init__(self, cmd, cmd2, callback):
>        self.__cmd = cmd
>        self.__cmd2 = cmd2
>        self.__callback = callback
>
>    def run(self):
>        # do stuff here
>        self.__callback(some_results)
>
>...anyhow, this just didnt seem good.  I felt like i either had to pass
>MyThread a bunch of arguments it needed to run the long task, or i
>would end up passing it a 'master'...but then in MyThread I'd have
>
>self.__master.__service.execute_cmd(self.__cmd)
>
>...in java I would just create an inner class..but i am not sure
>how/what to do in python.

  Here is an implementation of this idea:

http://cvs.twistedmatrix.com/cvs/trunk/twisted/internet/threads.py?view=markup&rev=11450&root=Twisted

  Note that it uses Deferreds instead of bare callbacks (because Deferreds are better in pretty much all cases), but it is a simple matter to adapt to a bare callback API.

  Jp


From bokr at oz.net  Fri Apr 29 17:38:17 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 29 Apr 2005 21:38:17 GMT
Subject: Reusing object methods?
References: <d4trsp$jsl$1@bagan.srce.hr>
Message-ID: <42729c37.243366582@news.oz.net>

On Fri, 29 Apr 2005 19:45:54 +0200, Ivan Voras <ivoras at _-_fer.hr> wrote:

>
>Can this be done: (this example doesn't work)
>
>----
>class A:
>
>     def a_lengthy_method(self, params):
>          # do some work depending only on data in self and params
>
>class B:
>
>     def __init__(self):
>         self.a_lengthy_method = A.a_lengthy_method
>         # I know that data in "self" of class B object is compatible
>         # with that of class A object
>----
>
>I want to 'reuse' the same method from class A in class B, and without 
>introducing a common ancestor for both of them - is this possible in an 
>elegant, straightforward way?

Your design intent is not quite clear to me, since you are trying to
capture the A method from B's instance initialization. If it is to be
a method of B, why not put the code in the class body of B instead
of in B.__init__, whose concern is B instances, not the B class (at least normally).
OTOH, if you really want an "instance-method" as an attribute of a B instance, see
class B below. Such a method is not shared by different instances, though the
example here doesn't demonstrate that, since they would all be clone instance-methods.
The C and D examples provide a shared method to their instances.

Here are some ways to do what you might be wanting to do ;-)

 >>> class A:
 ...    def a_lengthy(self, params): return self, params
 ...
 >>> class B:
 ...    def __init__(self):
 ...        self.a_lengthy = A.a_lengthy.im_func.__get__(self, type(self))
 ...
 >>> class C:
 ...    a_lengthy = A.a_lengthy.im_func
 ...
 >>> class D:
 ...    a_lengthy = A.__dict__['a_lengthy']
 ...
 >>> a = A()
 >>> b = B()
 >>> c = C()
 >>> d = D()
 >>> a.a_lengthy('actual param')
 (<__main__.A instance at 0x02EF628C>, 'actual param')
 >>> b.a_lengthy('actual param')
 (<__main__.B instance at 0x02EF618C>, 'actual param')
 >>> c.a_lengthy('actual param')
 (<__main__.C instance at 0x02EF62EC>, 'actual param')
 >>> d.a_lengthy('actual param')
 (<__main__.D instance at 0x02EF16CC>, 'actual param')
 >>>
 >>> vars(a)
 {}
 >>> vars(b)
 {'a_lengthy': <bound method instance.a_lengthy of <__main__.B instance at 0x02EF618C>>}
 >>> vars(c)
 {}
 >>> vars(d)
 {}

Note that class B borrows the A method and makes an "instance-method" -- i.e.,
a bound method bound to the instance and set as an attribute of that instance
(which is why it shows up in vars(b)).

This mechanism could make customized instance-methods for different instances,
if you wanted to, since the class B is not modified by making variations.

A method is just a class variable whose value is a function, until it is
accessed as an attribute of either the class or an instance. What makes
it a method is the attribute-retrieval mechanism. So what you want to do
is possible, but A.a_lengthy_method is not the function, it is an unbound
method (because it was retrieved as an attribute of the class as opposed
to via an instance. For an ordinary method, you can get the function via
the im_func attribute, but if you want to borrow something trickier, you
may want to try the way class D does it.

For new-style classes, you will run across some differences.

Regards,
Bengt Richter


From madeddie at madtech.cx  Fri Apr 15 18:50:57 2005
From: madeddie at madtech.cx (edwin)
Date: Sat, 16 Apr 2005 00:50:57 +0200
Subject: pexpect problem, spawn says I/O on closed file
Message-ID: <51a3c$42604551$c372e4ba$2495@nf1.news-service.com>


Hi,

I'm using pexpect in a plugin script within bartbot (an python based irc
bot). When I execute the plugin, python comes back with:

ERROR exceptions.ValueError file:
/home/edwin/devel/bartbot/myplugins/rttest.py linenr: 17 msg: I/O \
operation on closed file

rttest.py being the plugin script, line 17 being:
        child = spawn("ssh -l %s %s /bin/ls -l"%(user, host))

before i paste the whole script here, does anybody have any "ah, that's
simple, check..."'s? ;)


From donn at drizzle.com  Fri Apr 15 01:09:55 2005
From: donn at drizzle.com (Donn Cave)
Date: Fri, 15 Apr 2005 05:09:55 -0000
Subject: question about functions
References: None <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
Message-ID: <1113541794.311861@yasure>

Quoth "chris patton" <chrispatton at gmail.com>:
| Hi everyone.
|
| I have a question about passing arguments to python functions. Is there
| any way to make this job act like Perl?
|
| sub my_funk {
|
| print "the first argument: $_[0]\n";
| print "the second argument: $_[1]\n";  }
|
| In other words, can I call the arguments from a list?


	def my_funk(*a):
		print 'first', a[0]
		print 'second', a[1]

	my_funk('one', 'two')

You can mix this with normal argument usage, and there is a
similar way to pass parameters to a function from a tuple.

	Donn Cave, donn at drizzle.com


From mrmaple at gmail.com  Mon Apr 18 13:09:40 2005
From: mrmaple at gmail.com (James Carroll)
Date: Mon, 18 Apr 2005 13:09:40 -0400
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
In-Reply-To: <d40jm0$b93$1@sparta.btinternet.com>
References: <d4080i$q8d$1@titan.btinternet.com>
	<1113834504.919986.129180@z14g2000cwz.googlegroups.com>
	<d40jm0$b93$1@sparta.btinternet.com>
Message-ID: <b273c74105041810094301e2c2@mail.gmail.com>

Hi Bill,

Python 2.4 requires VC7.1 I just ran into this recently.  Once I
installed VC7.1, I could easily compile the Python source to create a
debug lib.

Winzip should be able to read the python source tarball... There is
one trick though.  Once you download it, it might get renamed to
python.tar.gz.tar  and the trick is to rename the file's extension to
.tar.gz or (my preference)  .tgz.

If it really is a bzip2 file, then you'll need some sort of bunzip.  I
use the cygnus version, but I don't remember having to do anything out
of the way for the python source.

-Jim

On 4/18/05, Bill Davy <Bill at synectixltd.com> wrote:
> 
> "A.B., Khalid" <abkhd at earth.co.jp> wrote in message
> news:1113834504.919986.129180 at z14g2000cwz.googlegroups.com...
> > Bill Davy wrote:
> >> I downlaoded and installed
> >> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
> >>
> >> I'm trying to build an extension using SWIG 1.3.24 and the linker
> > needs
> >> python24_d.lib (I do not have the DLL either).  I've not found it in
> > any of
> >> the
> >> downloads.
> 
> > I am no expert in MSVC6, but it sounds like maybe you need to supply
> > the no-debug switch in your extention setup.py file: /d NDEBUG.
> >
> > In case that does not work and help on this is not forthcoming, you can
> > always try pyMinGW[1].
> >
> >
> > Regards,
> > Khalid
> 
> Hmm, that's one possibility but I really do need to keep the debugger
> version going.  I'm only just getting started.  Any other suggestions?
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
>


From nyamatongwe+gravity at gmail.com  Wed Apr 13 09:44:48 2005
From: nyamatongwe+gravity at gmail.com (Neil Hodgson)
Date: Wed, 13 Apr 2005 13:44:48 GMT
Subject: terminate exectutioin in PythonWin
References: <d3j265$ne6$1@scotsman.ed.ac.uk>
Message-ID: <MPG.1cc7cd342ff0eccc989687@news-server>

Jim,

> 1.Could someone tell me how to terminate execution in PythonWin?

   Use the "Break into running code" command on the context menu of the 
PythonWin icon in the bottom right of the taskbar.

   Neil


From jepler at unpythonic.net  Sun Apr 10 09:37:51 2005
From: jepler at unpythonic.net (jepler at unpythonic.net)
Date: Sun, 10 Apr 2005 08:37:51 -0500
Subject: serialize a tkinter thing
In-Reply-To: <wdY5e.1205486$35.44369741@news4.tin.it>
References: <wdY5e.1205486$35.44369741@news4.tin.it>
Message-ID: <20050410133749.GA1330@unpythonic.net>

I suspect you're right.  Tkinter.Variable holds a reference to the tkapp
instance, which doesn't seem likely to be picklable.  Imagining that tkapp
instances *were* picklable, unpickling the stringvar would get you a whole new
application toplevel that you didn't want.

You might be able to extend pickle in some clever way to make it work, but it
would probably be easier and less fragile to arrange to pickle something that
is not composed of Tkinter.Variable instances.

Jeff
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From jason.massey at gmail.com  Tue Apr  5 10:47:23 2005
From: jason.massey at gmail.com (jason.massey at gmail.com)
Date: 5 Apr 2005 07:47:23 -0700
Subject: Python & MySQL
In-Reply-To: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
References: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
Message-ID: <1112712443.051520.25660@g14g2000cwa.googlegroups.com>

Okay,

I had the brilliant idea right after posting to google the newsgroups
on this.

db = MySQLdb.connect(user=database_user,passwd=database_password)

db.autocommit(True)   <--- One little line!


There ya go.  Works like a champ.  I swear I was pulling my hair out
yesterday over this.



From mwm at mired.org  Sat Apr 30 17:22:23 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 30 Apr 2005 16:22:23 -0500
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
	<mailman.5.1114734744.14961.python-list@python.org>
Message-ID: <86y8b0j6y8.fsf@guru.mired.org>

jfj <jfj at freemail.gr> writes:

> /* small program in C in self extracting archive
>   */
> if (have_application ("Python")) {
>    have_python:
>    system ("python.exe my_application.py")
> } else {
>    printf ("This software requires python. Wait until all the
> necessary components are being installed\n");
>    download_python_from_python_org();
>    system ("install_python.exe");
>    goto have_python;
> }

Goto. Ugh.

if (!have_application("Python")) {
    printf ("This software requires python. Wait until all the
 necessary components are being installed\n");
    download_python_from_python_org();
    system ("install_python.exe");
}
system("python.exe my_application.py");

                   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From tim at tt1lock.org  Sat Apr  9 12:52:41 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Sat, 9 Apr 2005 16:52:41 GMT
Subject: Are circular dependencies possible in Python?
References: <IEosBE.GtB@bath.ac.uk>
Message-ID: <IEouvt.IFw@bath.ac.uk>

Tim Tyler <tim at tt1lock.org> wrote or quoted:

> Like C, Python seems to insist I declare functions before calling
> them - rather than, say, scanning to the end of the current script
> when it can't immediately find what function I'm referring to.
> 
> C lets you predeclare functions to allow for the existence of
> functions with circular dependencies.
> 
> Does Python allow you to do something similar?
> 
> If not how do you create functions with circular dependencies in
> Python - where function A could call function B; and function
> B could call function A - or is that not possible?

Thanks guys - that's made how Python works in this area abundantly clear.
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From deetsNOSPAM at web.de  Thu Apr 14 14:02:19 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 14 Apr 2005 20:02:19 +0200
Subject: Python 2.3.5 make: *** [Parser/pgen] Error 1 Parser/grammar.o:
	I n function `translabel': undefined reference to `__ctype_b'
References: <mailman.1922.1113501092.1799.python-list@python.org>
Message-ID: <d3mb77$ahf$01$1@news.t-online.com>

Karalius, Joseph wrote:

> Can anyone explain what is happening here?  I haven't found any useful
> info on Google yet.

What have you been googling? I found this:

http://lists.debian.org/debian-glibc/2002/10/msg00093.html

Basically it seems that it's a problem with libc in general, not with
python.
-- 
Regards,

Diez B. Roggisch


From ods at strana.ru  Thu Apr 21 11:19:04 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 21 Apr 2005 19:19:04 +0400
Subject: Can an object of a C type have random members added?
 tp_dictoffset?
In-Reply-To: <c9m74d.fv9.ln@lightning.itga.com.au>
References: <c9m74d.fv9.ln@lightning.itga.com.au>
Message-ID: <20050421191904.0352eb30.ods@strana.ru>

On Thu, 21 Apr 2005 17:55:24 +1000 Gregory Bond wrote:

GB> I have a class implemented in C using tp_members to specify (read-only) 
GB> access to data members in the C struct. I'd like to be able to do the 
GB> decoration trick with objects of this class.  Is this possible?
GB> 
GB> [The documentation for tp_dictoffset eseems to hint that this is 
GB> possible..... how do I use it?]

Something like the following:

typedef struct {
        PyObject_HEAD
        PyObject *dict;
} YourObject;

static PyMemberDef module_members[] = {
        {"__dict__", T_OBJECT, offsetof(YourObject, dict), READONLY},
        {0}
};

PyObject *
Your_New()
{
        YourObject *obj;
        obj = PyObject_GC_New(YourObject, &Your_Type);
        if (obj==NUL) return NULL;
        obj->dict = PyDict_New();
        if (obj->dict==NULL) {
                Py_DECREF(obj);
                return NULL;
        }
        PyObject_GC_Track(obj);
        return (PyObject *)obj;
}

PyTypeObject Your_Type = {
        PyObject_HEAD_INIT(&PyType_Type)
        # ...skipped...
        offsetof(YourObject, dict), /* tp_dictoffset */
        # ...skipped...
}

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From steve at holdenweb.com  Mon Apr 11 16:08:39 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 11 Apr 2005 16:08:39 -0400
Subject: Problem with import "from omniORB import CORBA, PortableServer"
In-Reply-To: <1113247809.688746.233970@z14g2000cwz.googlegroups.com>
References: <1113247809.688746.233970@z14g2000cwz.googlegroups.com>
Message-ID: <d3ela2$mkr$2@sea.gmane.org>

gerald.maher at waytohere.com wrote:
> Hi,
> 
> I am trying to excuate the follwong code:
> 
> [
> import sys
> from omniORB import CORBA, PortableServer
> ]
> 
> I get the following error:
> [
> Traceback (most recent call last):
>   File
> "C:\omniORBpy-2.5-win32-python2.3\omniORBpy-2.5\examples\echoMyTest\example_echo_coloc.py",
> line 9, in ?
>     from omniORB import CORBA, PortableServer
> ImportError: No module named omniORB
> ]
> 
> Here is my Lib path:
> ['C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\examples\\echoMyTest',
> 'C:\\omniORB\\omniORB-4.0.3\\lib\\python',
> 'C:\\omniORB\\omniORB-4.0.3\\lib\\x86_win32',
> 'C:\\WINNT\\system32\\python24.zip', 'C:\\Python24',
> 'C:\\Python24\\DLLs', 'C:\\Python24\\lib',
> 'C:\\Python24\\lib\\plat-win', 'C:\\Python24\\lib\\lib-tk',
> 'C:\\Python24\\Lib\\site-packages\\pythonwin',
> 'C:\\Python24\\lib\\site-packages',
> 'C:\\Python24\\lib\\site-packages\\win32',
> 'C:\\Python24\\lib\\site-packages\\win32\\lib',
> 'C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\examples\\echoMyTest',
> 'C:\\omniORB\\omniORB-4.0.3\\lib\x86_win32',
> 'C:\\omniORB\\omniORB-4.0.3\\lib\x86_win32']
> 
> What am i doing wrong ?
> 
Well it look like you might be trying to use an OminORB from Python 2.3 
with Python 2.4, though I couldn't swear to it.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fuzzyman at gmail.com  Tue Apr  5 09:16:34 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 5 Apr 2005 06:16:34 -0700
Subject: Python Google Server
In-Reply-To: <mailman.1375.1112701816.1799.python-list@python.org>
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
	<mailman.1375.1112701816.1799.python-list@python.org>
Message-ID: <1112706994.922193.5610@z14g2000cwz.googlegroups.com>


vegetax wrote:
> it works on opera and firefox on linux, but you cant search in the
cached
> google! it would be more usefull if you could somehow search "only"
in the
> cache instead of putting the straight link. maybe you could put a
magic url
> to search in the cache, like search:"search terms"
>

Thanks for the report. I've also tried it with firefox on windows.

Yeah - google search results aren't cached !! Perhaps anything in a
google domain ought to pass straight through. That could be done by
testing the domain and using urllib2 to fetch the page.

Have just tested the following which works.

Add the follwoing two lines to the start of the code :

import urllib2
txheaders = { 'User-agent' : 'Mozilla/4.0 (compatible; MSIE 6.0;
Windows NT 5.1; SV1; .NET CLR 1.1.4322)' }

Then change the start of the send_head method to this :

    def send_head(self):
        """Only GET implemented for this.
        This sends the response code and MIME headers.
        Return value is a file object, or None.
        """
        print 'Request :', self.path # traceback to sys.stdout
        url_tuple = urlparse.urlparse(self.path)
        url = url_tuple[2]
        domain = url_tuple[1]
        if domain.find('.google.') != -1:   # bypass the cache for
google domains
            req = urllib2.Request(self.path, None, txheaders)
            return urllib2.urlopen(req)


> fuzzyman at gmail.com wrote:
>
> > I've hacked together a 'GoogleCacheServer'. It is based on
> > SimpleHTTPServer. Run the following script (hopefully google groups
> > won't mangle the indentation) and set your browser proxy settings
to
> > 'localhost:8000'. It will let you browse the internet using
google's
> > cache. Obviously you'll miss images, javascript, css files, etc.
> > 
> > See the world as google sees it !
[snip..]



From greg.lindstrom at novasyshealth.com  Fri Apr  8 09:19:52 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: Fri, 08 Apr 2005 08:19:52 -0500
Subject: Interpreter problem
Message-ID: <425684F8.5060507@novasyshealth.com>

I am using python 2.3.5 on a Linux system and have an odd problem 
dealing with the 'sha-bang' line.  I have a file, driver.py which starts 
with

#!/usr/bin/python

and works fine (that is, when I type in ./driver.py at the command 
prompt the file runs as expected).  I have another file, myotherfile.py 
which starts with the exact same line (#!/usr/bin/python) but I get

: bad interpreter: No such file or directory

Hmmmm.  That occurs when I have no trailing spaces after the word 
'python' on the first line.  When I place a single space at the end of 
the line I get:

usr/bin/python: can't open file      (note the lack of a slash at the 
start of the line...is that significant?)

In the 2nd file I placed import sys on line 2, then sys.exit(0) on line 
3 to isolate the behavior, so I'm pretty  sure the problem deals with 
the first line of the file.

If I remove the import sys and sys.exit(0) then type ./myotherfile.py at 
the command line it runs as expected. Both files have the same 
permission settings (744) and owner (me).  I'm been looking at this for 
a couple of days and am at a loss.  Have any of you seen anything like 
this and what can I do about it?

Thanks,
--greg

-- 
Greg Lindstrom               501 975.4859 (office)
Senior Programmer            501 219-4455 (fax)
NovaSys Health               greg.lindstrom at novasyshealth.com
Little Rock, Arkansas

"We are the music makers, and we are the dreamers of dreams."  W.W.

Confidentiality Notice
----------------------
This email and any attachments to it are privileged and confidential and are intended solely for use of the individual or entity to which they are addressed. If the reader of this message is not the intended recipient, any use, distribution, or copying of this communication, or disclosure of all or any part of its content to any other person, is strictly prohibited. If you have received this communication in error, please notify the sender by replying to this message and destroy this message and delete any copies held in your electronic files. Thank you.



From andrewgodwin at blueyonder.co.uk  Tue Apr 26 16:28:43 2005
From: andrewgodwin at blueyonder.co.uk (Andrew Godwin)
Date: Tue, 26 Apr 2005 20:28:43 GMT
Subject: Progress Bar with urllib2
Message-ID: <%vxbe.156302$Nr5.39335@fe2.news.blueyonder.co.uk>

I'm trying to write a python script to download data (well, files) from a HTTP server (well, a PHP script spitting them out, at least).
The file data is just the returned data from the request (the server script echoes the file and then dies).

I call the page using urllib2, like so:

satelliteRequest = urllib2.Request(satelliteServer + "?command=download&filepath="+filepath)
satelliteRequestData = {"username":satelliteUsername, "password":satellitePassword}
satelliteRequest.add_data(urllib.urlencode(satelliteRequestData))
satelliteOpener = urllib2.build_opener()
satelliteOpener.addheaders = [('User-agent', userAgent)]

Now, if I want to download the file all at once, I just do

satelliteData = satelliteOpener.open(satelliteRequest).read()

But some of these files are going to be really, really big, and I want to get a progress bar going. 
I've tried doing a while loop like this:

chunkSize = 10240
while 1:
 dataBuffer = satelliteOpener.open(satelliteRequest).read(chunkSize)
 data += dataBuffer
 if not dataBuffer:
  break

But that just gives me the first 10240 bytes again and again. Is there something I'm missing here?
It might even be I'm calling urllib2 the wrong way (does it download when you read() or when you create the Request?)

All help is appreciated, I'm sort of stuck here.

Andrew Godwin


From tom at dtsam.com  Thu Apr 21 12:15:32 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Thu, 21 Apr 2005 11:15:32 -0500
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
Message-ID: <TIOdnQkhrMfcTPrfRVn-uA@telcove.net>

"codecraig" <codecraig at gmail.com> wrote in message
news:1114098472.768814.281750 at g14g2000cwa.googlegroups.com...
<snip>
> Well so far from what I have found, Perl is faster than Python for
> RegEx, although perl is harder to read.

Yawn

How about Python being easier to *write*?

It never ceases to amaze me.  It takes days, weeks, months, sometimes even
years to write significantly useful software.  And yet so many seem to think
it is worthy to bother over the seconds that might be saved at execution
time.

If one were to achieve a mere percentage point or two in improving the
"write" efficiency of software - think how much more the world gains in
software quality and quantity.  How about man hours saved?  Why does anyone
still waste so much angst over execution speed?

I doubt the total execution time for all the RegEx queries you ever ran took
as much time as you just wasted on your little experiment.
Thomas Bartkus




From sharidas at zeomega.com  Mon Apr 18 08:43:16 2005
From: sharidas at zeomega.com (Satchidanand Haridas)
Date: Mon, 18 Apr 2005 18:13:16 +0530
Subject: Removing dictionary-keys not in a set?
In-Reply-To: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
Message-ID: <4263AB64.1010401@zeomega.com>

Hi,

I am not sure if this way is a good one, but it certainly is consise. 
Also sometimes, it's better to go for a simple approach than the consise 
one (for readability). With the abive disclaimer, I present my solution:

d1 = {1 : 2, 3 : 4, 5 : 6, 7 : 8, 9 : 10 }
s1 = [ 1, 5, 7 ]

# assuming you are using python 2.3.5
import sets
d2 = dict( [ ( x, d1[ x ] ) for x in sets.Set( d1.keys() ). 
intersection( sets.Set( s1 ) ) ] )


thanks,
Satchit


Tim N. van der Leeuw wrote:

>Hi,
>
>I'd like to remove keys from a dictionary, which are not found in a
>specific set. So it's kind of an intersection-operation.
>
>I can create a new dictionary, or a loop over all keys and test them
>for set-membership, but I was wondering if there was a smart way to
>express this in 1 or 2 concise statements that I'm not aware of.
>
>So are there smarter ways to get the intersection of dictionary and set
>into a dictionary than the following pseudo-code:
>
># Variation 1
>d2 = {}
>for key in s: d2[key] = d1[key]
>
># Variation 2
>for key in d.iterkeys(): if key not in s: del d[key]
>
>
>And if there's no smarter way, then which of these two options would
>give best performance?
>
>Cheers,
>
>--Tim
>
>  
>


From bearophileHUGS at lycos.com  Sat Apr  2 14:40:34 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Apr 2005 11:40:34 -0800
Subject: Suggesting methods with similar names
In-Reply-To: <1112355709.500870.51200@l41g2000cwc.googlegroups.com>
References: <1112188872.175741.225080@f14g2000cwb.googlegroups.com>
	<424b3db3.107335950@news.oz.net>
	<mailman.1107.1112235413.1799.python-list@python.org>
	<1112355709.500870.51200@l41g2000cwc.googlegroups.com>
Message-ID: <1112470834.892839.89750@f14g2000cwb.googlegroups.com>

Is that last idea so stupid? Still, I'd like to know if you know some
little Python search engines for such purpose.

Thank you,
Bearophile



From steven at lczmsoft.com  Fri Apr  1 05:36:24 2005
From: steven at lczmsoft.com (narke)
Date: 1 Apr 2005 02:36:24 -0800
Subject: A ClientForm Question
Message-ID: <1112351784.512279.198080@z14g2000cwz.googlegroups.com>

Does anyone here use ClientForm to handle a HTML form on client side?

I got a form, within which there is a image control, it direct me to
another page if i use mouse click on it.  the code of the form as
below:

<form name="ZoomControl1:Form1" method="post"
action="CDocZ_MAG.aspx?Stat=DocZoom_DocZoom&amp;&amp;E=29YL53ZJBIEZ&amp;DT=ALB&amp;Pass=&amp;Total=104&amp;Pic=1&amp;o="
id="ZoomControl1_Form1" onkeydown="JavaScript:Navigation_ie();">

...

<input type="image" name="ZoomControl1:Imagebutton2" onclick="if
(typeof(Page_ClientValidate) == 'function') Page_ClientValidate(); "
language="javascript" id="ZoomControl1_Imagebutton2"
src="../Images/Btn_GoImage.gif" border="0" />&nbsp;

...

</form>

So write below code to 'click' the image button,

    forms = ParseResponse(urlopen(url))

    form = forms[0]
    urlopen(form.click("ZoomControl1:Imagebutton2"))

unfortunatly, however, when the code run, it just got a page which is
not the one i desired ( i actually wish to get the same page as i
'click' the button).  I guess that is "onclick=" statement cause
something weird, but I do not understand it.  And, in the source
containing the form, i found nowhere the Page_ClientValidate() resides.

What's wrong?

-
narke



From gsakkis at rutgers.edu  Sun Apr 24 20:27:23 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 24 Apr 2005 17:27:23 -0700
Subject: HTML cleaner?
In-Reply-To: <d4h9uv$cge$1@bagan.srce.hr>
References: <d4h9uv$cge$1@bagan.srce.hr>
Message-ID: <1114388843.147267.225850@f14g2000cwb.googlegroups.com>

Probably you're looking for Beautiful Soup:
http://www.crummy.com/software/BeautifulSoup/

George



From jack at performancedrivers.com  Fri Apr  8 23:17:19 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 8 Apr 2005 23:17:19 -0400
Subject: Python extension performance
In-Reply-To: <WqydncT1Hq80p8rfRVn-2w@adelphia.com>
References: <WqydncT1Hq80p8rfRVn-2w@adelphia.com>
Message-ID: <20050409031719.GC21924@performancedrivers.com>

On Fri, Apr 08, 2005 at 10:14:52PM -0400, David Jones wrote:
> I am trying to hunt down the difference in performance between some raw 
> C++ code and calling the C++ code from Python.  My goal is to use Python 
> to control a bunch of number crunching code, and I need to show that 
> this will not incur a (big) performance hit.
..
> My C++ function (testfunction) runs in 2.9 seconds when called from a 
> C++ program, but runs in 4.3 seconds when called from Python. 
> testfunction calculates its own running time with calls to clock(), and 
> this is for only one iteration, so none of the time is in the SWIG code 
> or Python.
..
> Some potential causes of my problems:
> 
> - linking to a shared library instead building a static exe.
> - intel libraries are not being used when I think they are
> - libpython.so was built with gcc, so I am getting some link issues
> - can linking to python affect my memory allocation and deallocation in 
> c++??
The main overhead of calling C/C++ from python is the function call overhead
(python creating the stack frame for the call, and then changing the python
objects into regular ints, char *, etc).  You don't mention how many times
you are calling the function.  If it is only once and the difference is 1.4
seconds then something is really, really, messed up.  So I'll guess it is
hundreds of thousands of times?  Let us know.

> Some things I can try:
> - recompile python with the intel compiler and try again
> - compile my extension into a python interpreter, statically
> - segregate the memory allocations from the numerical work and compare 
> how the C++ and Python versions compare
Recompiling with the Intel compiler might help, I hear it is faster than 
GCC for all modern x86 platforms.  I think CPython is only tested on GCC
and windows Visual-C-thingy so you might be SOL.  The other two ideas
seem much harder to do and less likely to show an improvement.

-jackdied



From andrea_gavana at tin.it  Tue Apr 12 14:47:32 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Tue, 12 Apr 2005 20:47:32 +0200
Subject: "The C++ part of the .. Has been deleted, wsTaskBarIcon
Message-ID: <4200063400026197@ims9c.cp.tin.it>

Hello Alex,

    first of all, I would suggest you to upgrade wxPython to 2.5.5.1. There
is no particular reason to stick with 2.4, whatever someone else is thinkink/saying.
Secondly, I strongly suggest you to abandon the syntax:

from wxPython.wx import *

And to use:

import wx

This will help you in future versions of wxPython.
At last, looking at your 3 functions:

def OnExit(self, event):
        del self.tbIcon
        sys.exit()
	
    def OnCloseWindow(self, event):
        del self.tbIcon
        sys.exit()

    def OnTaskBarClose(self, event):
        del self.tbIcon
        sys.exit()

It is not enough to call "del self.tbicon". You need to add:

self.tbicon.RemoveIcon()
self.tbicon.Destroy()
del self.tbicon

And you *don't* need the call to sys.exit(). Just call self.Destroy() and
everything will terminate.

HTH.

Andrea.




From tim.leeuwvander at nl.unisys.com  Mon Apr 18 13:39:38 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 18 Apr 2005 10:39:38 -0700
Subject: Removing dictionary-keys not in a set?
In-Reply-To: <d40n0m$s78$1@panix3.panix.com>
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
	<d40n0m$s78$1@panix3.panix.com>
Message-ID: <1113845978.855729.261280@z14g2000cwz.googlegroups.com>

Hi Aahz,

The problem with using the builtin set operations is, that the
dictionary keys don't represent a set, so you can't directly create a
new dictionary using set methods.

So I'm looking for what's a concise way to update a dictionary, or
create a new dictionary, using basically an intersection method.

(I'm using Python 2.4.1 so I do have convenient builtin set operations
available)

In my taste, using generator expressions with conditions actually
doesn't look very readable; it hides the set-membership test under the
syntactic clutter.
(I don't mind generator expressions in principle, but I do feel that
here they clutter up the intent of the code)

cheers,

--Tim



From cyu021 at gmail.com  Mon Apr 11 08:04:35 2005
From: cyu021 at gmail.com (James Yu)
Date: Mon, 11 Apr 2005 20:04:35 +0800
Subject: How does Python call the system/primitive calls ?
Message-ID: <60bb954105041105047b0213e3@mail.gmail.com>

Dear Sirs,
 
I am trying to learn the way Python invokes system or primitive calls.
I tried to locate the function in Python's source that handles such 
requests, but I found it's like picking a needle in ocean.
Maybe you can let me know where to look for the documents and background 
readings ?

-- 
James Yu
cyu021 at gmail.com
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From aahz at pythoncraft.com  Tue Apr 12 09:20:26 2005
From: aahz at pythoncraft.com (Aahz)
Date: Tue, 12 Apr 2005 06:20:26 -0700
Subject: BayPIGgies REMINDER: April 14, 7:30pm (FIRST meeting at IronPort)
Message-ID: <20050412132026.GA2850@panix.com>

NOTE: we are no longer meeting at Stanford; the April meeting is at
IronPort in San Bruno


The next meeting of BayPIGgies will be Thurs, April 14 at 7:30pm.

Guido van Rossum (and any other BayPIGgies who wish to contribute) will
review the activities at PyCon 2005.

BayPIGgies meetings alternate between IronPort (San Bruno, California)
and Google (Mountain View, California).  For more information and
directions, see http://www.baypiggies.net/


Before the meeting, we may meet at 6pm for dinner.  Discussion of dinner
plans is handled on the BayPIGgies mailing list.


Advance notice: The May 12 meeting agenda has not been set.  Please send
e-mail to baypiggies at baypiggies.net if you want to suggest an agenda (or
volunteer to give a presentation).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From tzot at sil-tec.gr  Thu Apr 28 07:16:09 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 28 Apr 2005 14:16:09 +0300
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com><8664y9n8hy.fsf@guru.mired.org><1114512016.930540.164920@g14g2000cwa.googlegroups.com><01os61t4vg97o4seimge9sppqf9shj7pns@4ax.com><86mzrlkkxb.fsf@guru.mired.org>
	<723v61p699er30n78ngbm22r77jcson21h@4ax.com>
	<mailman.2583.1114615820.1799.python-list@python.org>
Message-ID: <f4h171tkeo00ifj7jrv4gr5m881pg0t0j0@4ax.com>

On Wed, 27 Apr 2005 17:28:04 +0200, rumours say that "Fredrik Lundh"
<fredrik at pythonware.com> might have written:

>> import errno
>> 
>> try:
>>   ...
>> except OSError, exc:
>> if exc.errno == errno.ENOENT: # file inexistant
>>      ...
>> elif exc.errno == errno.EPERM: # no permissions
>>      ...

>make that
>
>    elif exc.errno in (errno.EACCES, errno.EPERM): # no permissions

Yep, you're right (you wouldn't be a bot otherwise, right?-)

BTW I remember a post last summer about subclassing OSError (found it:
http://groups.google.com.gr/groups?selm=87llgxuyf5.fsf%40pobox.com --not
exactly what I remembered, but close.)

I think throwing subclasses of OSError based on errno would make life
easier --always assuming that Python requires POSIX conformance on all
platforms.  I will give it a try RSN...
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From vze4rx4y at verizon.net  Sat Apr  2 04:39:02 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 02 Apr 2005 09:39:02 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
Message-ID: <WKt3e.1908$7b.429@trndny01>

[Peter Hansen]
> This is pretty, but I *want* my tests to be contained
> in separate functions or methods.

In py.test, those would read:

def test1():
    assert a == b

def test2():
    raises(Error, func, args)

Enclosing classes are optional.


Raymond




From michele.simionato at gmail.com  Fri Apr  8 06:54:39 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Apr 2005 03:54:39 -0700
Subject: decorating functions with generic signatures (not for the faint
	of heart)
In-Reply-To: <1112955437.518384.56960@g14g2000cwa.googlegroups.com>
References: <1112955437.518384.56960@g14g2000cwa.googlegroups.com>
Message-ID: <1112957679.151395.159770@z14g2000cwz.googlegroups.com>

I said it was very little tested! ;)

This should work better:

#<decorate.py>

def _signature_gen(varnames, n_default_args, n_args,
rm_defaults=False):
    n_non_default_args = n_args - n_default_args
    non_default_names = varnames[:n_non_default_args]
    default_names = varnames[n_non_default_args:n_args]
    other_names = varnames[n_args:]
    n_other_names = len(other_names)
    for name in non_default_names:
        yield "%s" % name
    for i, name in enumerate(default_names):
        if rm_defaults:
            yield name
        else:
            yield "%s = arg[%s]" % (name, i)
    if n_other_names == 1:
        yield "*%s" % other_names[0]
    elif n_other_names == 2:
        yield "*%s" % other_names[0]
        yield "**%s" % other_names[1]

def decorate(func, caller):
    argdefs = func.func_defaults or ()
    argcount = func.func_code.co_argcount
    varnames = func.func_code.co_varnames
    signature = ", ".join(_signature_gen(varnames, len(argdefs),
argcount))
    variables = ", ".join(_signature_gen(varnames, len(argdefs),
argcount,
                                        rm_defaults=True))
    lambda_src = "lambda %s: call(func, %s)" % (signature, variables)
    dec_func = eval(lambda_src, dict(func=func, call=caller,
arg=argdefs))
    dec_func.__name__ = func.__name__
    dec_func.__doc__ = func.__doc__
    dec_func.__dict__ = func.__dict__.copy()
    return dec_func

#</decorate.py>



From pitonero at gmail.com  Sat Apr  2 23:02:47 2005
From: pitonero at gmail.com (El Pitonero)
Date: 2 Apr 2005 20:02:47 -0800
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
Message-ID: <1112500967.391604.289760@f14g2000cwb.googlegroups.com>

Ron_Adam wrote:
>
> So I didn't know I could do this:
>
> def foo(a1):
>     def fee(a2):
>         return a1+a2
>     return fee
>
> fum = foo(2)(6)   <------ !!!

Ah, so you did not know functions are objects just like numbers,
strings or dictionaries. I think you may have been influenced by other
languages where there is a concept of static declaration of functions.

The last line can be better visualized as:

fum = (foo(2)) (6)

where foo(2) is a callable.

-----------

Since a function is an object, they can be assigned (rebound) to other
names, pass as parameters to other functions, returned as a value
inside another function, etc. E.g.:

def g(x):
    return x+3

h = g # <-- have you done this before? assignment of function

print h(1) # prints 4

def f(p):
    return p # <-- function as return value

p = f(h) # <-- passing a function object

print p(5) # prints 8

Python's use of "def" keyword instead of the "=" assignment operator
makes it less clear that functions are indeed objects. As I said
before, this is something to think about for Python 3K (the future
version of Python.)

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

Function modifiers exist in other languages. Java particularly is
loaded with them.

public static synchronized double random() {
...
}

So your new syntax:

@decorator(a1)(foo)
def foo(): 
   pass 

is a bit out of the line with other languages.



From rbt at athop1.ath.vt.edu  Tue Apr 26 20:30:08 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 26 Apr 2005 20:30:08 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <diu2k2-6l3.ln1@lairds.us>
References: <d4ir0v$fed$1@solaris.cc.vt.edu> <d4j91s$bfp$1@solaris.cc.vt.edu>
	<tsd2k2-ed4.ln1@lairds.us> <d4m9hl$8br$1@solaris.cc.vt.edu>
	<diu2k2-6l3.ln1@lairds.us>
Message-ID: <d4mme5$2ej$1@solaris.cc.vt.edu>

Cameron Laird wrote:
> In article <d4m9hl$8br$1 at solaris.cc.vt.edu>,
> rbt  <rbt at athop1.ath.vt.edu> wrote:
> 			.
> 			.
> 			.
> 
>>Read and search them for strings. If I could do that on windows, linux 
>>and mac with the *same* bit of Python code, I'd be very happy ;)
> 
> 
> Textual content, right?  Without regard to font funniness, or
> whether the string is in or out of a table, and so on?

That's right. More specifically, I've written a script that uses a RE to search 
through documents for social security numbers. You can see it here:

http://filebox.vt.edu/users/rtilley/public/find_ssns/find_ssns.html

This works on Word, Excel, html, rtf or any ANSI based text. I need the ability to 
read and make sense of PDF files as well so I can apply the RE to their content. It's 
been frustrating to say the least. Nothing at all against Python... mostly just sick 
of hearing about the 'Portable' document format that isn't string or RE searchable... 
at least not easily anyway.

> 'Might be a few days before I answer; I'm crashing into end-of-
> the-month deadlines.

No problem. Thanks for the help.


From ojokimu at yahoo.co.uk  Sun Apr 10 12:44:48 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Sun, 10 Apr 2005 17:44:48 +0100 (BST)
Subject: check instace already running...
In-Reply-To: 6667
Message-ID: <20050410164449.44611.qmail@web26808.mail.ukl.yahoo.com>


--- Fabio Pliger <fabio.pliger at siavr.it> wrote:
> Yeah, but how can i retrieve my PID number?And how do i check if the
> process
> who has written the file is still alive?If there a way to have the
> list of
> the precesses running?

This subject has come up before. The thread starts here:

http://mail.python.org/pipermail/python-list/2004-September/243294.html

But see in particular this post:

http://mail.python.org/pipermail/python-list/2004-September/243379.html

There is also a cookbook recipe here:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252495

HTH

John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From kay.schluehr at gmx.net  Fri Apr  1 14:04:40 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 1 Apr 2005 11:04:40 -0800
Subject: Some notes about float approximations in mxNumber
References: <032720052340.23979.42474457000403FA00005DAB220699973508900A9C0E0C@comcast.net>
	<mailman.1183.1112362032.1799.python-list@python.org>
Message-ID: <1112382280.714450.170380@f14g2000cwb.googlegroups.com>

Hi Mark,

I was a bit surprised to find the very slow Farey approximation by
means of the <FareyRational> class in the mxNumber package. If the goal
was to reconstruct a rational from a float it is not a good choice and
should be replaced by a continued fractions approximation. Some time
ago I implemented it by myself so it can be published here:


def cfrac(z,bound=10**-5,n=10):
    '''
    creates a continued fraction from some number z.
    @ bound - terminate cf if the rest is lower than the provided bound
    @ n     - terminate cf after n steps
    '''
    l = []
    while 1:
        a = int(z)
        l.append(a)
        y = z-a
        if y<=bound or len(l)==n:
            return l
        z = 1./y


def fold(cf):
    '''
    create u/v = cfrac(a0,a1,...,an) using following rules:

    1. / u1 u0 \      / a1  1 \    / a0  1 \
       |       |  =   |       | *  |       |
       \ v1 v0 /      \ 1   0 /    \ 1   0 /

    2. The recursion rules
       v(n+1) = v(n)*a(n+1)+v(n-1)
       u(n+1) = u(n)*a(n+1)+u(n-1)
    '''
    if len(cf)<2:
        return Rational(0,1)
    un   = cf[0]*cf[1]+1
    vn   = cf[1]
    un_1 = cf[0]
    vn_1 = 1
    for a in cf[2:]:
        b  = un
        un = un*a+un_1
        un_1 = b
        b  = vn
        vn = vn*a+vn_1
        vn_1 = b
    return Rational(un,vn)


>>> fold(cfrac(1./3))
1/3
>>> fold(cfract(1525/42.))
1525/42

import math

>>> fold(cfract(math.sqrt(2)))
3363/2378


It is possible to provide this functionality in an even more efficient
manner because it is usefull to bound only the approximation error of
the rational, not the size of the continued fraction.

def float2ratio(z, bound=10**-5):
    '''
    convert a float into a Rational.
    The approximation is bound by the error-limit 'bound'.
    '''
    a = int(z)
    y = z-a
    z = 1./y
    b = int(z)
    un   = a*b+1
    vn   = b
    un_1 = a
    vn_1 = 1
    a    = b
    while 1:
        y = z-a
        if y<bound:
            return Rational(un,vn),k
        z = 1./y
        a = int(z)
        x  = un
        un = un*a+un_1
        un_1 = x
        x  = vn
        vn = vn*a+vn_1
        vn_1 = x
        xn = float(un)/vn
        yn = float(un_1)/vn_1
        if abs(xn-yn)<=bound:
            return Rational(un,vn)

>>> math.sqrt(2)
1.4142135623730951

>>> float2ratio(math.sqrt(2))
1393/985
>>> 1393./985
1.4142131979695431
        ^

>>> float2ratio(math.sqrt(2),10**-10)
275807/195025
>>> 275807./195025
1.4142135623637995
            ^

>>> math.pi
3.1415926535897931

>>> float2ratio(math.pi,10**-14)
245850922/78256779
>>> 245850922./78256779
3.1415926535897931

Note that the algorithm needed only 13 iteration steps to approximate
pi 
in this accuracy.

Regards,
Kay



From simon.brunning at gmail.com  Fri Apr 15 09:21:39 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 15 Apr 2005 14:21:39 +0100
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <425fb9da$0$290$ed9e5944@reading.news.pipex.net>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
	<425fb9da$0$290$ed9e5944@reading.news.pipex.net>
Message-ID: <8c7f10c6050415062113a97532@mail.gmail.com>

On 4/15/05, Graham <gsmith at oxfam.org.uk> wrote:
> Thanks Simon
> I have just installed mxODBC and tried one of their samples.
> Am getting an error on trying to import mx.ODBC
> 
>     ImportError: No module named mx.ODBC
> 
> After the install the mx folder has been place in my C:\Program Files\Plone
> 2\Python\lib\site-packages folder however when I browse the PythonPath and
> look under Standard Python Library I can't see mx.

Hmmm. Have you got more than one instance of Python installed? Do you
have a 'standard' installation in addition to Plone's? If so, perhaps
mxODBC has been installed for the wrong one.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From marco at reimeika.ca  Wed Apr 20 16:58:33 2005
From: marco at reimeika.ca (marco)
Date: 20 Apr 2005 16:58:33 -0400
Subject: New Python regex Doc (was: Python documentation moronicities)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1113856843.023012.165500@l41g2000cwc.googlegroups.com>
	<20050419000731.GA10263@unpythonic.net>
	<mailman.2090.1113911052.1799.python-list@python.org>
Message-ID: <yibfyxlyxl2.fsf@coxeter.math.toronto.edu>


Re: http://xahlee.org/perl-python/python_re-write/lib/module-re.html

Bill Mill <bill.mill at gmail.com> writes:

> Alright, I feel like I'm feeding the trolls just by posting in this
> thread. Just so that nobody else has to read the "revised" docs, no it
> doesn't:

I find that Lee's version complements the official docs quite nicely.

> 1) He didn't really change anything besides the intro page and
> deleting the matching vs. searching page and the examples page. He
> also put a couple of <hr> breaks into the doc.

Official doc:

findall(pattern, string[, flags])

    Return a list of all non-overlapping matches of pattern in string. If
    one or more groups are present in the pattern, return a list of groups;
    this will be a list of tuples if the pattern has more than one
    group. Empty matches are included in the result unless they touch the
    beginning of another match. New in version 1.5.2. Changed in version
    2.4: Added the optional flags argument.

Revised doc:

findall(pattern, string[, flags])

    Return a list of all non-overlapping matches of pattern in string. For
    example:

re.findall(r'@+', 'what   @@@do  @@you @think')
# returns ['@@@', '@@', '@']

    If one or more groups are present in the pattern, return a list of
    groups; this will be a list of tuples if the pattern has more than one
    group. For example:

re.findall(r'( +)(@+)', 'what   @@@do  @@you @think')
# returns [('   ', '@@@'), ('  ', '@@'), (' ', '@')]

    Empty matches are included in the result unless they touch the
    beginning of another match. For example:

re.findall(r'\b', 'what   @@@do  @@you @think')
# returns ['', '', '', '', '', '', '', '']

need another example here showing what is meant by "unless they touch the
beginning of another match."


Personally I find the latter much clearer (even in its incomplete state).

> 3) adding "MAY NEED AN EXAMPLE HERE" instead of actually putting one in

Well, you could suggest one to him.

Cheers,

--
marco at reimeika.ca
Gunnm: Broken Angel                      http://amv.reimeika.ca
http://reimeika.ca/                      http://photo.reimeika.ca


From bill.mill at gmail.com  Mon Apr 18 09:42:32 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Mon, 18 Apr 2005 09:42:32 -0400
Subject: Strings and Lists
In-Reply-To: <d769864e.0504180342.426357d3@posting.google.com>
References: <d769864e.0504180342.426357d3@posting.google.com>
Message-ID: <797fe3d405041806423bfbd1f5@mail.gmail.com>

On 18 Apr 2005 04:42:17 -0700, Tom Longridge <tomlongridge at gmail.com> wrote:
> My current Python project involves lots repeatating code blocks,
> mainly centred around a binary string of data. It's a genetic
> algorithm in which there are lots of strings (the chromosomes) which
> get mixed, mutated and compared a lot.
> 
> Given Python's great list processing abilities and the relative
> inefficiencies some string operations, I was considering using a list
> of True and False values rather than a binary string.
> 
> I somehow doubt there would be a clear-cut answer to this, but from
> this description, does anyone have any reason to think that one way
> would be much more efficient than the other? (I realise the best way
> would be to do both and `timeit` to see which is faster, but it's a
> sizeable program and if anybody considers it a no-brainer I'd much
> rather know now!)
> 
> Any advice would be gladly recieved.
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

Tom,

it seems to me that, if efficiency is your main goal, you should store
your data as a list of integers, and use the bit-twiddling operators
to get at your data. These should be *very* fast, as well as memory
efficient.

Peace
Bill Mill
bill.mill at gmail.com


From pyguy2 at gmail.com  Mon Apr 25 09:49:19 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 25 Apr 2005 06:49:19 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <426a7882.331053609@news.oz.net>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
	<1114188913.806103.120830@f14g2000cwb.googlegroups.com>
	<4269397e.249385737@news.oz.net>
	<1114229764.079444.145570@g14g2000cwa.googlegroups.com>
	<426a7882.331053609@news.oz.net>
Message-ID: <1114436959.704681.182790@l41g2000cwc.googlegroups.com>

>I am objecting to embeddeding metadata in data.
....
>I think we were just looking a different aspects of the elephant ;-)

I think you are right on both counts.

Given current filesystems, I like the #! method. I tend to like
approaches that have very low entrance access fees and can scale up.
Kinda like python's "hello world" versus Java's.  It seems as though
our managing of complexity fails exponentially the more cruft you add
to things.  The more you can keep things simple, the further you can
avoid the inflection point.

john



From fredrik at pythonware.com  Mon Apr 25 10:32:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 25 Apr 2005 16:32:14 +0200
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
Message-ID: <d4iunr$7uq$1@sea.gmane.org>

"googleboy" <mynews44 at yahoo.com> wrote:

> I am writing a little app tha tI would like to make cross-platform
> (debian, RH, Fedora, Solaris, AIX, etc)
>
> Originally I decided to check what uname returned, as I didn't think it
> mattered beyond the detail of Linux or SunOS etc.
>
> Recently I have learned that FC3 breaks my script,  so I need to be
> able to determine not simply "Linux" but to know exactly what unix the
> script is being run on.
>
> What is the best way to determine this?

start here:

    >>> help("platform")

if that doesn't help, something like this could work:

    >>> redhat = open("/etc/redhat-release").read()
    >>> fedora_3 = redhat.startswith("Fedora Core release 3")

(with proper use of try/except, of course)

on the other hand, it might be better to figure out why FC3 breaks your
script, and check for (missing/alternative) features instead of checking for
the exact OS version.

</F> 





From rschroev_nospam_ml at fastmail.fm  Sat Apr 30 10:19:57 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sat, 30 Apr 2005 14:19:57 GMT
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <mailman.53.1114835526.14961.python-list@python.org>
References: <d4u60o$akh$1@news2.netvision.net.il>	<mailman.47.1114818531.14961.python-list@python.org>	<3dg5isF6qe1nhU1@news.dfncis.de>
	<mailman.53.1114835526.14961.python-list@python.org>
Message-ID: <huMce.77581$wn1.5086305@phobos.telenet-ops.be>

Mike Rovner wrote:

> David Murmann wrote:
> 
>>Shane Hathaway wrote:
>>
>>
>>>That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
>>>"temporary end".
>>>
>>>Shane
>>>
>>>P.S. I hope I didn't hammer your server on step 3.  I was missing the
>>>mark. :-)
>>
>>
>>Interestingly step 3 is actually wrong... there is an additional 
>>solution, which looks like cqqmsxk. (I don't think that spoils the fun :))
> 
> 3 IS wrong because if you use any not BIG letter after bodyguard on both 
> sides, you get extra 'eCQQmSXK\n' which slow me down for 5 minutes.

Strange: I don't find eCQQmSXK\n, only eCQQmSxK\n. I guess the data has 
been modified in order to get that potential confusion out of the way.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From kent37 at tds.net  Mon Apr 18 08:20:38 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 18 Apr 2005 08:20:38 -0400
Subject: pydoc preference for triple double over triple single
	quotes--anyreason?
In-Reply-To: <mailman.2032.1113772321.1799.python-list@python.org>
References: <mailman.2008.1113679688.1799.python-list@python.org>	<42617449_3@newspeer2.tds.net>	<mailman.2030.1113757909.1799.python-list@python.org>	<4262c00e$1_3@newspeer2.tds.net>
	<mailman.2032.1113772321.1799.python-list@python.org>
Message-ID: <4263a1e2$1_3@newspeer2.tds.net>

Brian van den Broek wrote:
> Kent Johnson said unto the world upon 2005-04-17 16:17:
> 
>> Brian van den Broek wrote:
>>
>>> Kent Johnson said unto the world upon 2005-04-16 16:41:
>>>
>>>> Brian van den Broek wrote:
>>>>
>>>>> I've just spent a frustrating bit of time figuring out why pydoc 
>>>>> didn't extract a description from my module docstrings. Even though 
>>>>> I had a well formed docstring (one line, followed by a blank line, 
>>>>> followed by the rest of the docstring), when I ran Module docs, my 
>>>>> modules showed up as having "no description". ("Module docs" 
>>>>> referring to the shortcut installed on Windows that launches the 
>>>>> pydoc server.)
>>
>> I'm not sure what you mean by "the results list in the TKinter 
>> interface to the pydoc server". I ran the server, clicked "open 
>> browser" and browsed to a module in site-packages; that worked fine 
>> for me under Win2K and Python 2.4.1.
>>
> 
> By "the TKinter interface to the pydoc server" I mean the window that 
> pops up when you select the Module Docs shortcut. It is pictured here 
>  <http://www.onlamp.com/python/2001/04/18/graphics/pydoc1.gif>, which is 
> Fig.1 in an article on pydoc by Cameron Laird 
> <http://www.onlamp.com/pub/a/python/2001/04/18/pydoc.html>. By "results 
> list" I mean the gray-backround'ed box immediately below the "Search 
> for" input box in the illustration.
> 
> The puzzle for me was that if I enter my module name in the "Search for" 
> box, it shows up in the list of results, as expected. But whether the 
> results list entry for my module incorporates the description form my 
> module's docstring or instead shows my module as having "(no 
> description)" is a function of which style of triple quotes I used. (If 
> my module docstring is enclosed by triple double quotes, the description 
> is extracted from my module's docstring. If it uses triple single quotes 
> instead, for purposes of the results list my module's docstring is 
> ignored, and the module is listed as having "(no description)".)

OK, now I get it. I don't use pydoc much and I missed that display.

This is indeed a bug in pydoc. If you look at lines 194, 195 and 201 in pydoc.py (Python 2.4.1 
version) you can see that it is parsing out the module docstring itself and it only looks for """ 
strings.

Here is a patch that accepts ''' strings as well. Though a better patch would allow any kind of 
string. I filed a bug report at
http://sourceforge.net/tracker/index.php?func=detail&aid=1185124&group_id=5470&atid=105470

Kent

194,195c194,195
<             if line[:4] == 'r"""': line = line[1:]
<             if line[:3] == '"""':
---
 >             if line[:4] == 'r"""' or line[:4] == "r'''": line = line[1:]
 >             if line[:3] == '"""' or line[:3] == "'''":
201c201
<                 result = strip(split(line, '"""')[0])
---
 >                 result = strip(re.split('\'\'\'|"""', line)[0])


From steven.bethard at gmail.com  Sat Apr 23 17:44:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 23 Apr 2005 15:44:30 -0600
Subject: func_code vs. string problem
In-Reply-To: <d4ef1b$ml4$1@nemesis.news.tpi.pl>
References: <d4dtar$4f4$1@nemesis.news.tpi.pl>
	<d4easv$rgm$1@nemesis.news.tpi.pl>
	<QvKdnZAEj5TEKfffRVn-oQ@comcast.com>
	<d4ef1b$ml4$1@nemesis.news.tpi.pl>
Message-ID: <FL2dnap6a5snXPffRVn-1g@comcast.com>

Filip Dreger wrote:
> If I had a magic function 'exec in current scope' I would implement it 
> like this:
> 
> class actor:
>   def __init__():
>     self.roles=[]
>   def act():
>     for i in self.roles:
>       exec i in current scope
> 
> then the roles would simply be functions defined in any importable 
> file. For example creating an actor that logs each time it is called 
> would be as simple as:
> 
> import actor
> 
> def log():
>   self.counter+=1
>   print "called %d times"%self.counter
> 
> a=actor.actor()
> a.counter=0
> a.roles.append(log)

Any reason you can't define it like:

class actor(object):
     def __init__(self):
         self.roles = []
     def act(self):
         for role_func in self.roles:
             role_func(self)

And then write your other modules like:

import actor

def log(self):
     self.counter += 1
     print "called %d times"%self.counter

a = actor.actor()
a.counter = 0
a.roles.append(log)

The only real difference here is that log is basically declared as an 
instance method.  So if you need to update actor.actor state, you simply 
modify the self object.

> 2. I need the roles to have full access to global and local namespace 
> of the actor object (sometimes they have to change it, and sometimes 
> they have to use some external modules) - the roles should work like 
> plugins.

By importing actor, they have full access to the global namespace of the 
actor.actor object, by simply accessing the actor module attributes.

So the issue here is really about full *local* namespace access.  Do you 
really need *full* local namespace access?  Why isn't access to the 
actor.actor instance sufficient?

STeVe


From peufeu at free.fr  Mon Apr 11 07:01:25 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Mon, 11 Apr 2005 13:01:25 +0200
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
Message-ID: <op.so2d8n2cqfv3if@localhost>


> MySQL is an excellent option is very well documented.  It is also a
> defacto standard for OpenSource databases.

	MySQL sucks for anything but very very basic stuff as it supports no  
transactions, foreign keys, procedures, triggers, concurrency, etc.
	Postgresql is a lot better, free, and the psycopg adapter for Postgres is  
*very very* fast (a lot faster than the MySQL one) and it has a  
dictfetchall() method which is worth its weight in donuts !


From steve at holdenweb.com  Tue Apr 12 13:55:15 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 13:55:15 -0400
Subject: web authoring tools
In-Reply-To: <Xns96365D77A1AE5vaneveryindiegamedes@207.69.189.191>
References: <Xns9635B27CBB14Evaneveryindiegamedes@207.69.189.191>	<mailman.1736.1113291110.1799.python-list@python.org>
	<Xns96365D77A1AE5vaneveryindiegamedes@207.69.189.191>
Message-ID: <d3h1rl$h0u$1@sea.gmane.org>

Brandon J. Van Every wrote:
> Steve Holden <steve at holdenweb.com> wrote in
> 
>>Brandon J. Van Every wrote:
>>
>>>I believe Dreamweaver-esque.  I see myself writing articles and
>>>eventually doing snazzy eye candy layouts.  I do not see myself
>>>engaging in elaborate flow control or anything terribly programmatic.
>>> I want to concentrate on the content, not the mechanism.
>>>
>>>
>>
>>I've stayed out of this one so far because of a natural disinclination
>>to join religious discussions, but sine we are now talking good common
>>sense I'd like to ask whether a *batch-oriented* system for folding 
>>database content into a static web site with common look-and-feel
>>would be of interest.
>>
>>Now PyCon is over I've been able to blog about the techniques used to 
>>generate the web site at http://www.holdenweb.com/, and most recently 
>>about using reStructured Text in the database to ease authorship 
>>problems for the less-taxing content. See
>>
>>http://www.holdenweb.com/blogs/2005/04/versioned-reviews-implemented-po
>>st.html 
>>
>>to determine whether the overall approach would work for you.
> 
> 
> I have 2 goals:
> 
> 1) to worry about plumbing as little as possible, as I generate articles 
> and content.  Once a framework is established, this can be handled 
> "cookie cutter."
> 
The purpose of the software is precisely to deliver database content in 
a "fully-plumbed" fashion. You still have to maintain the content, and 
there are clearly no drag-and-drop tools, but a set of database rows in 
a page table is what the system uses to generate www.holdenweb.com.

> 2) to create a unique brand identity based on good eye candy.  For this 
> part of the problem, the website cannot look generic.  At a minimum, I 
> would need a facility that allows me to painlessly arrange my own 2D 
> artwork.
> 
That's what stylesheets are for, and this design is fully stylesheet-driven.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From EckhoffM at NAVO.NAVY.MIL  Wed Apr 27 16:56:00 2005
From: EckhoffM at NAVO.NAVY.MIL (Eckhoff, Michael A)
Date: Wed, 27 Apr 2005 15:56:00 -0500
Subject: interactive web graphics
Message-ID: <23E4371F6124D411B59B00805F9FA97115D68283@navont3.navo.navy.mil>

Hello,

I failed to locate a list for pygtk, so I thought I'd
ask my question here. Is it possible to write CGI
scripts that bring up a GUI (as in GTK+, QT, Tk, ...)
or an openGL display that is windowed inside a web
browser?

The answer would seem to me to be no, since the
client could be Windows or Linux. I'd like to
display some pretty graphics (scientific visualisation),
but web applications are not my background.

I would like a form with progress bars, but I guess
that would have to be implemented in some special way.
Sorry if these questions are ill-posed; I am just
getting my feet wet with python.

Thanks,
Michael E

PS Congratulations for having such wonderful documentation
on all things python. 


From rdm at rcblue.com  Sun Apr 17 07:22:37 2005
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 17 Apr 2005 04:22:37 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <4262261c.159801732@news.oz.net>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
	<4262261c.159801732@news.oz.net>
Message-ID: <6.2.1.2.2.20050417041737.03aa7e30@rcblue.com>

Bengt Richter wrote at 02:26 4/17/2005:

> >Could someone remind me how to get the output of bc -l into a text file
> >on Windows? (I've tried employing " > pi3003.txt" in various ways) OR,
> >how to copy and paste from the command line window, or whatever that
> >window is called? (Sorry for the OT question.)
>To copy from the command window to the clipboard:
>
>1. Scroll top of desired stuff to make it visible near top
>2. Hold down Alt
>3. Tap Space Bar
>4. Release Alt
>5. Tap e
>6. Tap k
>7. Use mouse or arrow keys to place cursor on top left corner of desired box
>8. Hold down Shift
>9. Use arrow keys or mouse-with-left-button-pressed to go to bottom 
>right character of desired box
>9a. If the bottom is out of sight, keep holding  shift down and pretend 
>you can cursor down below bottom.
>     the attempt should make the screen scroll up and select more 
> desired material. If you overshoot, don't panic,
>     just keep holding down shift and use arrows (the are slower) or 
> mouse-with-left-button-still-down to move to
>     desired bottom right corner.
>10. Release mouse button if using that
>11. Release Shift
>12. Press Enter
>That should copy to the clipboard and make the selection box revert to 
>normal display.
>
>Pasting from clipboard is up to you. Pasting into the command window 
>from clipboard
>is 2-5 above, and Tap p

Thanks for showing me another way. But Roel Schroeven's

"to copy from the command prompt window: open the system menu
(icon in the top left corner of the window) and choose Edit->Mark. Then
select what you want to copy and press Enter or choose Edit->Copy in the
system menu."

seems to be easier.


>PS. Redirecting with > from a script whose interpreter was started by 
>windows extension association
>doesn't work on some version of windows. To be safe, invoke the 
>interpreter explicitly, e.g.,
>     python myscript.py [whatever args here] > pi3003.txt

Thanks very much for this.

What kind of args could I use here?

Dick




From harlinseritt at yahoo.com  Sat Apr  9 11:50:10 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 9 Apr 2005 08:50:10 -0700
Subject: workaround for generating gui tools
In-Reply-To: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
Message-ID: <1113061810.530359.172720@g14g2000cwa.googlegroups.com>

Benedict,

Best to hand-code your code ;-) -- even GUI. This is kind of why I like
Tkinter so much. Good luck.

Harlin Seritt



From grante at visi.com  Fri Apr 22 17:44:24 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 21:44:24 -0000
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<116inf1aivjgd28@corp.supernews.com>
	<1114205820.773917.70820@f14g2000cwb.googlegroups.com>
Message-ID: <116is1or7an6735@corp.supernews.com>

On 2005-04-22, dcrespo <dcrespo at gmail.com> wrote:
>>> Your solution requires a previous installation of Acrobat.
>
>> Probably not.  Most printing systems I'm familiar with use
>> ghostscript to render PDF into either postscript (the case on
>> my machines at home) or whatever raster format the printer
>> desires (the case at my office).
>
> Acrobat (windows) and Ghostscript are PDF drivers.

No, ghostscript isn't a "driver". it's a normal user-space
application, but I'm not sure what you're point is. My
statement that printing PDF doesn't depend on Acrobat is true
regardless of whether ghostscript is a driver or application.

>>> Internally, the OS is sending the pdf file to the Acrobat PDF
>>> Driver and then it is sent to the printer.
>
>> Nope.  It's usnig the foomatic print filters which in turn use
>> ghostscript to render PDF.
>
> What I mean is that the pdf file is sent to a pdf driver (some
> program to interpret it)... In your case is ghostscript, and
> in my case is Acrobat.

That's not a driver.  At least not in my world.  Drivers live
in kernel space.  Acrobat and ghostscript are just applications
that run in user-space.

>> No you just need a good printing system.  CUPS + foomatic works
>> great for me.  It knows what to do with postcript, text, PDF,
>> dvi, and a whole boatload of other fileformats that I don't
>> ever use.
>
> CUPS + foomatic are the whole megadriver... So it's just a
> manner of saying PDF Driver for my study case.

You're use of the word "driver" is one with which I'm not
familiar.  But I don't really "do windows" so it's probably a
Widnowism.

> Really thanks for all the information :) I didn't know about
> Ghostscript.

I'm sure you can use ghostscript to do the same thing under
Windows (render PDF into the raster format preferred by your
printer), but I've no idea how one would go about it.

-- 
Grant Edwards                   grante             Yow!  Hmmm... a CRIPPLED
                                  at               ACCOUNTANT with a FALAFEL
                               visi.com            sandwich is HIT by a
                                                   TROLLEY-CAR...


From radam2 at tampabay.rr.com  Mon Apr 25 09:31:30 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Mon, 25 Apr 2005 13:31:30 GMT
Subject: Injecting code into a function
In-Reply-To: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <Si6be.12987$716.7868@tornado.tampabay.rr.com>

George Sakkis wrote:

> Is there a general way of injecting code into a function, typically
> before and/or after the existing code ? I know that for most purposes,
> an OO solution, such as the template pattern, is a cleaner way to get
> the same effect, but it's not always applicable (e.g. if you have no
> control over the design and you are given a function to start with). In
> particular, I want to get access to the function's locals() just before
> it exits, i.e. something like:
> 
> def analyzeLocals(func):
>     func_locals = {}
>     def probeFunc():
>         # insert func's code here
>         sys._getframe(1).f_locals["func_locals"].update(locals())
>     probeFunc()
>     # func_locals now contains func's locals
> 
> So, how can I add func's code in probeFunc so that the injected code
> (the update line here) is always called before the function exits ?
> That is, don't just inject it lexically in the end of the function if
> there are more than one exit points. I guess a solution will involve a
> good deal bytecode hacking, on which i know very little; if there's a
> link to a (relatively) simple HOWTO, it would be very useful.
> 
> Thanks,
> George

I'd like to know this as well.  :)

I think you will have to modify the function func in some way to get 
locals when it exits.

def func():
     x = 20
     y = 40
     func.locals = locals()   # inserted line

func()
print func.locals


On a related note, I'd like to know how to import locals into a function.

Cheers,
Ron













From seefeld at sympatico.ca  Mon Apr 11 14:54:59 2005
From: seefeld at sympatico.ca (Stefan Seefeld)
Date: Mon, 11 Apr 2005 14:54:59 -0400
Subject: Missing Module when calling 'Import' _omnipy
In-Reply-To: <1113258389.432002.323790@f14g2000cwb.googlegroups.com>
References: <1113258389.432002.323790@f14g2000cwb.googlegroups.com>
Message-ID: <425AC803.70704@sympatico.ca>

gerald.maher at waytohere.com wrote:
> I am trying to run an Corba example using Python and i get the follwing
> error:
> 
> 
>     import _omnipy
> ImportError: No module named _omnipy
> 
> Where can i find this Module ?

This is an extension module (i.e. the file is named _omnipy.so or _omnipy.dll, I believe),
and it is in the library path, not the python path. Thus you will have to add the library
path to the PYTHONPATH variable.
For details see http://omniorb.sourceforge.net/omnipy2/omniORBpy/omniORBpy001.html#toc2
or the omniORB specific mailing list.

HTH,
		Stefan




From simon.brunning at gmail.com  Tue Apr 26 04:45:58 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 26 Apr 2005 09:45:58 +0100
Subject: Changing a line in a text file
In-Reply-To: <87y8b6ah61.fsf@debian.kirkjobsluder.is-a-geek.net>
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
	<mailman.2435.1114423084.1799.python-list@python.org>
	<1114423528.568195.12750@l41g2000cwc.googlegroups.com>
	<mailman.2439.1114424658.1799.python-list@python.org>
	<87y8b6ah61.fsf@debian.kirkjobsluder.is-a-geek.net>
Message-ID: <8c7f10c605042601456bf96c08@mail.gmail.com>

On 4/25/05, Kirk Job Sluder <kirk at jobsluder.net> wrote:
> In addition, I would argue that editing a file in place using a
> non-interactive program is dangerous and bad practice in general.  By
> the time you find a bug in your edit script, the original is lost.  This
> is something I learned from bitter experience when I tried to be smart
> and make script-based edits over entire directories of html files.

See http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/56037

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From eurleif at ecritters.biz  Thu Apr  7 16:52:48 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 07 Apr 2005 20:52:48 GMT
Subject: Use string in URLs
In-Reply-To: <d33tdo$fvr$05$1@news.t-online.com>
References: <d33tdo$fvr$05$1@news.t-online.com>
Message-ID: <A4h5e.204$5I5.19901@newshog.newsread.com>

Markus Franz wrote:
> I want to use the string "r?ffer" in a get-request, so I tried to encode 
> it.
> 
> My problem: But with urllib.quote I always get "r%FCffer", but I want to 
> get "r%C3%BCffer" (with is correct in my opinion).

urllib.quote(u'r?ffer'.encode('utf8'))


From philippe at philippecmartin.com  Mon Apr 25 09:51:36 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 25 Apr 2005 13:51:36 GMT
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
Message-ID: <IB6be.547$m85.139@newssvr30.news.prodigy.com>

How about popen of 'uname -r' ?

Regards,

Philippe


googleboy wrote:

> Hi there.
> 
> I am writing a little app tha tI would like to make cross-platform
> (debian, RH, Fedora, Solaris, AIX, etc)
> 
> Originally I decided to check what uname returned, as I didn't think it
> mattered beyond the detail of Linux or SunOS etc.
> 
> Recently I have learned that FC3 breaks my script,  so I need to be
> able to determine not simply "Linux" but to know exactly what unix the
> script is being run on.
> 
> What is the best way to determine this?
> 
> Thanks!
> 
> googleboy



From tiissa at nonfree.fr  Wed Apr 20 17:20:26 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 23:20:26 +0200
Subject: pyGTK on Mouse over event ?
In-Reply-To: <1114029300.082094.293410@g14g2000cwa.googlegroups.com>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
	<4266baf3$0$7208$626a14ce@news.free.fr>
	<1114029300.082094.293410@g14g2000cwa.googlegroups.com>
Message-ID: <4266c798$0$18013$636a15ce@news.free.fr>

Domenique.Tilleuil at gmail.com wrote:
> def __init__(self):
>     xml = gtk.glade.XML("/home/domenique/project1.glade")
>     self.window = xml.get_widget("window1")
>     self.img = xml.get_widget("image1")
>     self.img.set_from_file("./test.svg")
>     self.img.show()
>     self.img.add_events(gtk.gdk.BUTTON_MOTION_MASK)
>     xml.signal_autoconnect({
> 	'on_window1_delete_event': self.on_window1_delete_event,
> 	'on_window1_destroy_event': self.on_window1_destroy_event,
> 	'on_image1_motion_notify_event': self.on_image1_motion_notify_event,
> 	'on_image1_button_press_event': self.img_key_press,
>     })
> 
> This is the code so far. i've added the MOTION MASK to the image
> widget, is that what u ment ?
> 
Yes.
But I guess by your question it doesn't work better than before. Sorry I 
didn't help much. :/


From dan at dontspammecauseidontlikit.com  Thu Apr  7 23:11:24 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Fri, 08 Apr 2005 11:11:24 +0800
Subject: Sockets
References: <36qb5199613lai084brifj8judpoummv6n@4ax.com>
	<mailman.1514.1112928735.1799.python-list@python.org>
Message-ID: <idtb51pj2m244815tcoicsiee7h3n69v9j@4ax.com>

On Thu, 7 Apr 2005 21:52:11 -0500, jepler at unpythonic.net wrote:

>Python strings always carry their length, and can have embedded NULs.
>    s.write("\0\1\2\3")
>should write 4 bytes to the socket 's'.

I'm taking binary data from a database, so it's not really a Python
string.  Is there an easy way to convert it?

Thanks

Dan



From superprad at gmail.com  Mon Apr 25 15:16:37 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 25 Apr 2005 12:16:37 -0700
Subject: Bounding box on clusters in a 2D list
In-Reply-To: <1114378980.909132.216600@f14g2000cwb.googlegroups.com>
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
	<1114378980.909132.216600@f14g2000cwb.googlegroups.com>
Message-ID: <1114456596.990810.233630@z14g2000cwz.googlegroups.com>

bearphile, Is there a way I could do the floodfill rather iteratively
than recursive. It somehow breaks although I made some optimisations to
the code.



From andre.roberge at gmail.com  Sat Apr 23 16:13:29 2005
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9_Roberge?=)
Date: Sat, 23 Apr 2005 17:13:29 -0300
Subject: Using Ming on Windows
Message-ID: <d4ea01$m02$1@sea.gmane.org>

I tried to install Ming
(http://sourceforge.net/projects/ming/)
on Windows to use with Python *but*
I can't [/don't know how to] use "make" to install it.

Does anyone know where I could find a ready-made compiled
version for Windows to just "put in" my site-packages directory.

Any help would be appreciated.

Andr?



From roy at panix.com  Fri Apr 29 08:29:04 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 29 Apr 2005 08:29:04 -0400
Subject: large dictionary creation takes a LOT of time.
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
Message-ID: <roy-1174BA.08290429042005@reader1.panix.com>

In article <1114757468.367583.210840 at z14g2000cwz.googlegroups.com>,
 "possibilitybox" <possibilitybox at gmail.com> wrote:

> this code here:
> 
> 
> def wordcount(lines):
>     for i in range(len(lines)/8):
>         words = lines[i].split(" ")
>         if not locals().has_key("frequency"):
>             frequency = {}
>         for word in words:
>             if frequency.has_key(word):
>                 frequency[word] += 1
>             else:
>                 frequency[word] = 1
>     return frequency
> wordcount(lines)
> 
> is taking over six minutes to run on a two megabyte text file.  i
> realize that's a big text file, a really big one (it's actually the
> full text of don quixote.).

Something doesn't make sense with your timing.

I just downloaded the text of Don Quixote 
(http://www.gutenberg.org/dirs/9/9/996/996.txt).  It's about 2.3 Mbytes, 
428 kwords, 40 klines.  This includes the text of the novel itself, plus a 
little boilerplate text added by the Gutenberg Project folks.

I ran your program against it on my PowerBook (1 GHz PowerPC, Python 2.3.4, 
768 Mbytes RAM).  It took about 0.4 seconds.  When I got rid of the "/8" in 
the range() call (so it processed the whole text), it took about 1.8 
seconds (0.24 of which were just reading the file).  Some other posters 
reported similiar findings.

What kind of system are you running it on?  The only thing I can think of 
is that you've got way too little memory and your machine is just 
thrashing.  My Python process is about 31 Mb when it first starts up, grows 
to 35 when the file is read into a list, then gets to 38 after the call to 
wordcount().

> i'm trying to figure out how.  is there a
> better way for me to do a frequency count of all the words in the text?
>  it seems to me like this should scale linearly, but perhaps it isn't?
> i don't know much about algorithmic complexity.  if someone could give
> a breakdown of this functions complexity as well i'd be much obliged.

Well, I don't see anything in your code which isn't linear.  There are some 
places where you could do things a little more efficiently, but these would 
all be replacing one linear process with a better linear process.  Small 
speedups, but not the drastic kind of speedups you would expect by 
replacing a quadratic process with a linear one.

Here's a few things I would change:

>         if not locals().has_key("frequency"):
>             frequency = {}

This is kind of silly.  Just factor this out of the main loop, and do 
"frequency = {}" before the first for loop.  This won't speed things up 
other than trivially, but it'll make your code easier to read and 
understand.

Next, replace

> for i in range(len(lines)):
>         words = lines[i].split(" ")

with something like

> for line in lines:
>    words = line.split()

It's marginally faster, easier to read, and is actually more correct; 
calling split() with no arguments makes it split on arbitrary white space, 
which is probably what you really want:

>>> "foo bar    baz".split(" ")
['foo', 'bar', '', '', '', 'baz']

>>> "foo bar    baz".split()
['foo', 'bar', 'baz']

And lastly, instead of

if frequency.has_key(word):
>                 frequency[word] += 1
>             else:
>                 frequency[word] = 1

I would do:

try:
   frequency[word] += 1
except KeyError:
   frequency[word] = 1

which is usually a little bit faster.  Somebody else mentioned using the 
get() method of dictionaries here; that might be even better, but I learned 
the try/except trick before get() existed, so I tend to stick to that :-)

But, as I said, all of these are just minor tweaks.  Overall, your code 
looks like it should run in O(n), so fixing your code is not where you 
should be looking.  Something external (i.e. memory thrashing or some other 
exceptionally bad bit of system performance) has to be causing the 
horrendously bad performance you're seeing, and that's where you should be 
concentrating your efforts.

BTW, if you suspected you had some kind of non-linear algorithm, and didn't 
trust code inspection to verify its existance, you could just run your 
program a bunch of times on different sized data sets, and plot runtime vs. 
input size to see what kind of curve you get.


From steven.bethard at gmail.com  Sun Apr 10 15:19:13 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 10 Apr 2005 13:19:13 -0600
Subject: numarray.array can be VERY slow
In-Reply-To: <hYmdnXBeqZ1K0sTfRVn-tg@comcast.com>
References: <hYmdnXBeqZ1K0sTfRVn-tg@comcast.com>
Message-ID: <WYGdnRsbBaio4cTfRVn-1w@comcast.com>

Edward C. Jones wrote:
> #! /usr/bin/env python
> 
> """Should this program take 4.3 seconds to run? I have a Linux PC with
>    an AMD Athlon XP 2000+ chip (1.7Gh). I use Python 2.4.1 and numarray
>    1.2.3, both compliled from source."""
> 
> import time, numarray
> from numarray.numerictypes import *
> 
> nested = []
> for i in range(8):
>     inner = []
>     for j in range(8):
>         inner.append(numarray.ones((256,256), Float64))
>     nested.append(inner)
> t = time.clock()
> arr = numarray.array(nested)
> print time.clock() - t

As mentioned, this has nothing to do with numarray, and everything to do 
with your inexplicable use of lists.  Why don't you just write this as:

arr = numarray.ones((8, 8, 256, 256), Float64)

??

STeVe


From fperez.net at gmail.com  Thu Apr 14 18:53:53 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Thu, 14 Apr 2005 16:53:53 -0600
Subject: [ANN] IPython 0.6.13 is out.
Message-ID: <d3ms3j$2j0$1@sea.gmane.org>

Hi all,

I'm glad to announce the release of IPython 0.6.13.

IPython's homepage is at:

http://ipython.scipy.org

and downloads are at:

http://ipython.scipy.org/dist

I've provided RPMs (for Python 2.3 and 2.4, built under Fedora Core 3), plus
source downloads (.tar.gz).  Fedora users should note that IPython is now
officially part of the Extras repository, so they can get the update from
there as well (though it may lag by a few days).

There is also a native win32 installer which should work correctly for both
Python 2.3 and 2.4.

Debian, Fink and BSD packages for this version should be coming soon, as the
respective maintainers (many thanks to Jack Moffit, Andrea Riciputi and Dryice
Liu) have the time to follow their packaging procedures.

Many thanks to Enthought for their continued hosting support for IPython, and
to all the users who contributed ideas, fixes and reports.  In particular,
thanks to Frederic Mantegazza for extensive discussions on embedding features
which make ipython suitable for use in the kind of complex environments I had
always wanted it to be used.


WHAT is IPython?
----------------

1. An interactive shell superior to Python's default. IPython has many
features for object introspection, system shell access, and its own special
command system for adding functionality when working interactively.

2. An embeddable, ready to use interpreter for your own programs. IPython can
be started with a single call from inside another program, providing access to
the current namespace.

3. A flexible framework which can be used as the base environment for other
systems with Python as the underlying language. 


Release notes
-------------

*** WARNING to pysh users *** A backwards-incompatible change has been made.

1. You must update your pysh profile (~/.ipython/ipythonrc-pysh):

    a) Add to it the line:

        import_all IPython.Extensions.InterpreterExec

    b) Delete the line

        execfile pysh.py

2. You must also delete from ~/.ipython/ the file pysh.py.

*** END pysh warning.


As always, the NEWS file can be found at http://ipython.scipy.org/NEWS, and
the full ChangeLog at http://ipython.scipy.org/ChangeLog.  The highlights of
this release follow.

* Improved variable capture from system commands.  The %sc and %sx magics (and
    hence the !!syntax in Pysh) now capture to special objects which, while
looking like strings/lists, provide automatic conversion between the various
modes:

In [12]: sc a=ls s*py

In [13]: a  # the returned object looks like a plain string
Out[13]: 'sanner.py\nscopes.py\nsplot.py\nstrings.py'

In [14]: a.s  # but you can see it as a string with pure whitespace
Out[14]: 'sanner.py scopes.py splot.py strings.py'

In [15]: a.l  # as a list
Out[15]: ['sanner.py', 'scopes.py', 'splot.py', 'strings.py']

In [16]: a.n  # or as a string with newlines
Out[16]: 'sanner.py\nscopes.py\nsplot.py\nstrings.py'

If you capture the result split as a list, the returned object exhibits the
exact same interface with .s, .l and .n attributes:

In [18]: sc -l b=ls s*py

In [19]: b
Out[19]: ['sanner.py', 'scopes.py', 'splot.py', 'strings.py']

In [20]: b.s
Out[20]: 'sanner.py scopes.py splot.py strings.py'

In [21]: b.l
Out[21]: ['sanner.py', 'scopes.py', 'splot.py', 'strings.py']

In [22]: b.n
Out[22]: 'sanner.py\nscopes.py\nsplot.py\nstrings.py'

Try the above and use a? and b? to see the full docstrings of these special
objects, which can be extremely convenient when manipulating system commands
output.

* By default, IPython now binds the up/down arrow keys to search only in the
history which matches your input so far.  If you are an old user your
ipythonrc file is NOT automatically updated, but you can get this effect by
putting the following in it:

readline_parse_and_bind "\e[A": history-search-backward
readline_parse_and_bind "\e[B": history-search-forward

* Many changes and improvements to make it easier to embed ipython into
complex interactive environments.  These changes were motivated by the needs
of Frederic Mantegazza, and more details can be found on the -dev list
archives and at this wiki page specially created for this discussion:

http://www.scipy.org/wikis/featurerequests/IPython

In particular, ipython now exposes the ability to set custom exception
handlers, docstring extraction methods, custom tab-completion routines, and
more.  That wiki page also serves as documentation (with code examples)  for
some of these more complex features.

IPython also now exposes its own input execution routine (the runlines()
method).  You can thus feed this method snippets of input (even multiline)
with magic syntax and all other special extensions, which it will process as
if they had been typed at the command line.

* Multi-line specials are now active by default.  This means that you can use
special syntax, like !cmd, in python multi-line input.  A silly example:

In [26]: for i in range(3):
     ....:     !ls $i
     ....:
ls: 0: No such file or directory
ls: 1: No such file or directory
ls: 2: No such file or directory

* Magics can also be called in multi-line input, and python variables can be
expanded in magics just like in system calls or aliases:

In [36]: mydir='/usr/include/atlas'

In [37]: cd mydir
[Errno 2] No such file or directory: 'mydir'
/home/fperez

In [38]: cd $mydir
/usr/include/atlas

This brings consistency to the various special subsystems in ipython: they ALL
expand python expressions with the same rules (those of Itpl linked to above),
and they can all be used in multiline input.

* Dynamic prompt strings.  Now, the following ${foo()+x+bar.baz()} is a valid
prompt string, where foo, x and bar will be evaluated at runtime from your
interactive namespace.  Arbitrary Python expressions, according to the Itpl
design, can be thus used (see http://www.python.org/peps/pep-0215.html for
details on Itpl).

* Fixes for (X)Emacs prompt support (hung file queue when executing files from
an emacs buffer).

* Fixes (thanks to John Hunter) for tab-completion in the face of broken
objects on which dir() returns anything other than a list of pure strings
(such as the ITK library).

* Other small fixes and cleanups.


Enjoy, and as usual please report any problems.

Regards,

Fernando.



From grante at visi.com  Wed Apr  6 10:42:32 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 06 Apr 2005 14:42:32 -0000
Subject: optparse and negative numbers as positional arguments
References: <115605ankljag93@corp.supernews.com>
	<11560md3p6drtc8@corp.supernews.com>
	<1157r6s30dmfia2@corp.supernews.com>
Message-ID: <1157taos7guia05@corp.supernews.com>

On 2005-04-06, Tomi Silander <tsilande at hiit.fi> wrote:
> Grant Edwards wrote:
>
>> On 2005-04-05, Tomi Silander <tsilande at hiit.fi> wrote:
>
>>>How is one supposed to give negative numbers as positional
>>>arguments when using optparse?
>> 
>>   ./mitvit.py -- -1.1
>
> this works.

Yes, I know. :)

> I saw it in the source, but apparently did not properly pay
> attention; all the args after "--" are considered positional
> if I read this right.

That's the way it's traditionally been done.  I just assumed
that optparse did it that way, and when I tried it with
optparse it seemed to work the same.  It's not mentioned in the
optparse documentation anywhere (it probably should be).

-- 
Grant Edwards                   grante             Yow!  .. are the STEWED
                                  at               PRUNES still in the HAIR
                               visi.com            DRYER?


From gsakkis at rutgers.edu  Fri Apr  8 21:40:54 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 8 Apr 2005 18:40:54 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<mailman.1593.1113005609.1799.python-list@python.org>
Message-ID: <1113010854.638038.173460@g14g2000cwa.googlegroups.com>

> Err, you might want to explain what these things do instead of an
> abstract description of how you are doing it.  It looks like you are
> using inheritance in the normal way _and_ you are using it to handle
> versioning of some kind (maybe stable interface releases? I don't
know).
>
> Let us know what parts need inheritance for, and what you have
> just been using a side effect of inheritance for as a convenience
> (versioning, I think).
>
> A more concrete example would be easier to comment on, if possible
> do a simple one (maybe just two classes with two versions each).
>
> -jackdied

I intentionally abstracted the problem to remove the irrelevant
details, but here's a more concrete (though still simplified) example.
I hope it is more clear now.

George

#=============================

def worldModelFactory(version):
    if version < 2: return WorldModel()
    else: return WorldModel_v2()

class WorldModel(object):

    def __init__(self):
        self.ourGoal = self.FieldObject(x=-50, y=0)
        self.theirGoal = self.FieldObject(x=+50, y=0)
        self.ball = self.MovableObject()
        self.teammates = [self.Player(i) for i in xrange(1,12)]
        self.opponents = [self.Player(i) for i in xrange(1,12)]

    class FieldObject(object):
        def __init__(self, id=None, x=0, y=0):
            self.id = id
            self._pos = (x,y)
        def position(self):
            '''Get or estimate the current position.'''
            return self._pos

    class MovableObject(FieldObject):
        def speed(self):
            '''Get or estimate the current speed.'''
            # [implementation snipped]

    class Player(MovableObject):
        def passBall(self,power,teammate):
            '''Pass the ball to the teammate.'''
            # [implementation snipped]


class WorldModel_v2(WorldModel):

    class FieldObject(WorldModel.FieldObject):
        '''New implementation of FieldObject.'''
        def position(self):
            # [new implementation snipped]
            pass

    class MovableObject(WorldModel.MovableObject, FieldObject):
        '''MovableObject didn't change since the previous version. The
           only reason for this class is to make
WorldModel_v2.FieldObject
           accessible to WorldModel_v2.Player.
        '''
        pass

    class Player(WorldModel.Player, MovableObject):
        '''New implementation of Player.'''
        def passBall(self,power,teammate):
            # WorldModel_v2.FieldObject.position() should be called
            myPosition = self.position()
            # [new implementation snipped]

#=============================



From stevenaleach at mac.com  Mon Apr 25 13:19:16 2005
From: stevenaleach at mac.com (steve.leach)
Date: Mon, 25 Apr 2005 13:19:16 -0400
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
Message-ID: <d4j8qk$tc1$1@domitilla.aioe.org>

dcrespo wrote:
> Hi all...
> 
> I think wxPython is much better than PyGTK. First of all, PyGTK needs
> the GTK runtime installed, whereas wxPython is entirely Python's

And depending on your platform, wxPython also requires GTK installed.

wxWindows is a wrapper for different GUI toolkits.  On Windows, it uses 
the native API.  On Linux, it tries to use GTK but fails to work most of 
the time.

wxPython would indeed be a better choice if your applications are only 
to run on a certain infamous legacy operating system from the
Pacific Northwest.  The PyGTK is a better choice if you are writing for 
Linux and want your application to also be able to run on windows. 
wxWindows is *extremely* buggy on Linux where it is just a poor wrapper 
for the GTK toolkit.  In my experience, most supposedly portable multi 
platform applications built around wxWindows which are supposed to run 
on Linux simply don't run at all.  Personally, I have no need to write 
for Windows [or any way to test such code].  I know that the GTK toolkit 
is available for Windows, and also now for OS X without the need for an 
X server.

Just my $0.02


From stewart.midwinter at gmail.com  Thu Apr  7 00:01:13 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 6 Apr 2005 21:01:13 -0700
Subject: Python modules for image / map manipulation?
In-Reply-To: <mailman.1341.1112665026.1799.python-list@python.org>
References: <d4c0d48005040418069d4ea65@mail.gmail.com>
	<mailman.1341.1112665026.1799.python-list@python.org>
Message-ID: <1112846473.149931.268600@z14g2000cwz.googlegroups.com>

my image file is only about 5 MB, so, it's not too large.

I've done some testing with PIL and it will meet my needs, I think.  I
can see how I could slice and dice my image, or only present the
cropped section that I need. 

thanks,
S



From rkern at ucsd.edu  Wed Apr 13 02:53:04 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 12 Apr 2005 23:53:04 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1793.1113334936.1799.python-list@python.org>
	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3ifes$8dp$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2005-04-12, Robert Kern schreef <rkern at ucsd.edu>:
> 
>>Antoon Pardon wrote:
>>
>>
>>>What licence can I use? Somewhere they say you can combine python
>>>code with GPL code. Does that mean that the resulting code has
>>>to have both the GPL license as the PSF license, as both seem
>>>to want that derived work uses the same license.
>>
>>No, the PSF does not want that. It does not say so anywhere in the 
>>license text. Yes, you can GPL the derived work. The licenses are 
>>compatible.
>>
> 
> 
> This comes from the license text.
> 
> | 2. Subject to the terms and conditions of this License Agreement, PSF
> | hereby grants Licensee a nonexclusive, royalty-free, world-wide
> | license to reproduce, analyze, test, perform and/or display publicly,
> | prepare derivative works, distribute, and otherwise use Python 2.3
> | alone or in any derivative version, provided, however, that PSF's
> | License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
> | 2001, 2002, 2003 Python Software Foundation; All Rights Reserved" are
> | retained in Python 2.3 alone or in any derivative version prepared by
> | Licensee.
> 
> So what should I understand by: provided, however, that PSF's License
> Agreement ... are retained in Python 2.3 alone or in any derivative 
> version prepared by Licensee.

Yes, the license text and the copyright notice must be attached. It 
doesn't mean that the PSF license is the operative one for the 
derivative work. You can put *your* own terms on top for *your* own code 
as long as you can satisfy the requirements of the PSF license, which 
are very light.

Read Larry Rosen's book:

   http://www.rosenlaw.com/oslbook.htm

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From grante at visi.com  Thu Apr 21 11:03:32 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 21 Apr 2005 15:03:32 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
	<116fbo3pma1lsdb@corp.supernews.com> <d48eov$ddn$2@n6.co.ru>
Message-ID: <116fg649v5rsf14@corp.supernews.com>

On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> Grant Edwards <grante at visi.com> writes:
>
>> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
>> 
>> > Well, I'm writing for embedded realtime systems in C/C++ and
>> > have never encountered a single need to use goto.
>> 
>> I have encountered situations in C programs where the best
>> thing to use was a goto.  Those situations have always been
>> handled beutifully by a "raise" in Python.
>
> setjmp/longjump?

I've always found setjmp/longjmp much more confusing and hard
to maintain than a simple goto.  It also requires library
support that goto doesn't.

-- 
Grant Edwards                   grante             Yow!  Your CHEEKS sit like
                                  at               twin NECTARINES above
                               visi.com            a MOUTH that knows no
                                                   BOUNDS --


From peufeu at free.fr  Sat Apr 16 06:52:54 2005
From: peufeu at free.fr (peufeu at free.fr)
Date: Sat, 16 Apr 2005 12:52:54 +0200
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
Message-ID: <op.spbm6gjppda12i@localhost>


> How would you write
>
> if f(x=1):
>     print "yes"
>
> using suite-based keyword args?

	Good point.
	Then we should remove the extra ':' at the end of the function invocation  
:

if f(x=@>):
		value of x
	print "yes"

if f(@**>):
		x: value of x
	print "yes"


From phil at riverbankcomputing.co.uk  Tue Apr  5 04:17:05 2005
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Tue, 5 Apr 2005 09:17:05 +0100 (BST)
Subject: Eric3 under WinXP
In-Reply-To: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
References: <t63351l115lm7tc556c7gkd22gdc4m0hiq@4ax.com>
Message-ID: <65399.82.68.80.137.1112689025.squirrel@river-bank.demon.co.uk>

> Hello NG,
>
> (Win XP)
>
> I have successfully installed pyqt, but not
> qtext, which I need to run Eric3.
> The PyQT demo files run fine.
>
> I've downloaded QScintilla, compiled via MS-VC,
> but (I suppose I need the SIG), to translate or provide
> the Python interface with pyd Files.
>
> Eric complains, that qtext is not found.
>
> Has anyone success with getting this to work and how?
>
> Many thanks in advance for possible answers,

You haven't said which version of PyQt you are using. I guess it's the
non-commercial version based on Qt v2 - QScintilla (and therefore eric)
requires Qt v3.

Phil



From max2 at fisso.casa  Sat Apr  2 11:06:18 2005
From: max2 at fisso.casa (max(01)*)
Date: Sat, 02 Apr 2005 16:06:18 GMT
Subject: instance name
In-Reply-To: <424ec149$0$142$e4fe514c@news.xs4all.nl>
References: <99z3e.1157607$35.42889387@news4.tin.it>
	<424ec149$0$142$e4fe514c@news.xs4all.nl>
Message-ID: <_pz3e.1157668$35.42893339@news4.tin.it>

Irmen de Jong wrote:
> max(01)* wrote:
> 
>>hi.
>>
>>is there a way to define a class method which prints the instance name?
>>
>>e.g.:
>>
>>
>>>>>class class_1:
>>
>>...   def myName(self):
>>...     ????what should i do here????
>>...
>>
>>>>>instance_1 = class_1()
>>>>>instance_1.myName()
>>
>>'instance_1'
>>
>>bye
>>
>>macs
> 
> 
> What should the following do, you think?
> 
> 
>>>>a=class_1()
>>>>b=a
>>>>b is a
> 
> True
> 
>>>>b.myName()
> 
> ????print what????
> 
> There is no such thing as "the" instance name.
> (a and b both point to the same instance, in my example)
> 
> Also: why do you want this? It smells like you're
> actually looking for the use of a dict to do your job.

right. it seems i need to dive deeper in the language "spirit".

thanks a lot

bye

macs


From tgagne at wide-open-west.com  Tue Apr  5 10:28:54 2005
From: tgagne at wide-open-west.com (Thomas Gagne)
Date: Tue, 05 Apr 2005 10:28:54 -0400
Subject: IronPython 0.7 released!
In-Reply-To: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
Message-ID: <acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>

Does the Python community think Microsoft's embrace is a good or bad thing?

James wrote:
> http://www.gotdotnet.com/workspaces/workspace.aspx?id=ad7acff7-ab1e-4bcb-99c0-57ac5a3a9742
> 


From mark.hellewell at gmail.com  Thu Apr 14 08:59:48 2005
From: mark.hellewell at gmail.com (mark hellewell)
Date: Thu, 14 Apr 2005 13:59:48 +0100
Subject: A little request about spam
In-Reply-To: <7ee3dcd80504140551385ce25e@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
Message-ID: <d3fd636605041405592212edf8@mail.gmail.com>

On 4/14/05, James <spiralx at gmail.com> wrote:
> Yes - it's been like that for the last month or so now and it's quite
> annoying, especially seeing as before it was working at near enough
> 100% accuracy.

And I don't suppose there's much we can do about it?

mark


From robin at reportlab.com  Thu Apr  7 12:43:51 2005
From: robin at reportlab.com (Robin Becker)
Date: Thu, 07 Apr 2005 17:43:51 +0100
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <3bjtvuF6d00nnU2@individual.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<mailman.1222.1112417820.1799.python-list@python.org>	<d2vhi8$k29$1@panix1.panix.com>
	<4253fe0c$1@nntp0.pdx.net> <3bjtvuF6d00nnU2@individual.net>
Message-ID: <42556347.9030901@chamonix.reportlab.co.uk>

Greg Ewing wrote:
> Scott David Daniels wrote:
> 
>> Aahz wrote:
>>
>>> You just can't have your cake and eat it, too.
>>
>>
>> I've always wondered about this turn of phrase.  I seldom
>> eat a cake at one sitting.
> 
> 
> You need to recursively subdivide the cake until
> you have a piece small enough to fit in your input
> buffer. Then the atomicity of the cake-ingestion
> operation will become apparent.
> 
Ok course according to Tarski we can cut the cake up so it increases in volume.
The slices have to be immeasurable, but the final volume can be almost anything.
I bet that makes cake buffering harder to plan for.

-paradoxically yrs-
Robin Becker



From aleksander.helgaker at gmail.com  Wed Apr 20 08:41:37 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 20 Apr 2005 05:41:37 -0700
Subject: building a small calculator
In-Reply-To: <mailman.2171.1114000794.1799.python-list@python.org>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
	<mailman.2168.1113999910.1799.python-list@python.org>
	<1114000275.227950.50870@f14g2000cwb.googlegroups.com>
	<mailman.2171.1114000794.1799.python-list@python.org>
Message-ID: <1114000897.084753.80950@l41g2000cwc.googlegroups.com>

Sorry. This is my first day using Python.

Is there an equivelent to the goto command? I want to find some way to
take the user back to the main menu.



From cam.ac.uk at mh391.invalid  Wed Apr 27 10:20:00 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 27 Apr 2005 15:20:00 +0100
Subject: schedule a monthly ftp event
In-Reply-To: <Mvydnaqc3JAChvLfRVn-uw@powergate.ca>
References: <1114553735.360210.290000@f14g2000cwb.googlegroups.com>
	<pan.2005.04.27.01.36.42.976974@jerf.org>
	<Mvydnaqc3JAChvLfRVn-uw@powergate.ca>
Message-ID: <d4o72h$n6r$2@gemini.csx.cam.ac.uk>

Peter Hansen wrote:
> Jeremy Bowers wrote:
> 
>> ... On UNIX, use some "cron" varient, Windows has
>> some sort of Scheduler built in but I've never done anything with it but
>> turn it off
> 
> 
> Modern Windowsen also have the "AT" command line program which is 
> sometimes a much more appropriate way to get at that capability than the 
> "Scheduler" GUI approach.  Haven't had occasion to use either yet, 
> myself...

Personally I use the scheduler GUI and the schtasks.exe command-line 
program which is an interface to the same capability. At.exe gives you 
an interface to an older API.

But there is a Python interface to the older API. Here's an example:

http://www.microsoft.com/technet/scriptcenter/scripts/python/os/tasks/ostkpy01.mspx
-- 
Michael Hoffman


From steve at holdenweb.com  Tue Apr  5 10:53:26 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 10:53:26 -0400
Subject: Python & MySQL
In-Reply-To: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
References: <1112711966.414550.38680@z14g2000cwz.googlegroups.com>
Message-ID: <4252A666.8020500@holdenweb.com>

jason.massey at gmail.com wrote:
> Hi all,
> 
> I've got a weird problem.  I was running Python 2.3 and MySQLdb and had
> everything running fine.
> 
> Cutting to the chase: After upgrading to 2.4 (and latest modules) the
> MySQLdb functions in Python can connect to the database, do queries and
> do inserts.
> 
> Or rather, it seems to do inserts.  If I just run in the Python command
> line and manually connect to the database and do an insert and then a
> query on what I just inserted the info is there.
> 
> However when I use SQLyog to look at the database the info isn't there.
>  When I close down Python, restart, reconnect and query the info isn't
> there.
> 
> Info inserted from SQLyog is persistant.
> 
> Has anyone had any problems like this before? 
> 
> thanks,
> 
> jason
> 
I suspect you are forgetting to commit your changes to the database, so
they are being rolled back when you close your connection.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From beliavsky at aol.com  Mon Apr 18 09:59:07 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 18 Apr 2005 06:59:07 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <1113832747.373571.13220@l41g2000cwc.googlegroups.com>

What are the potential applications of Python on PalmOS? Just curious.



From steve at holdenweb.com  Fri Apr  8 12:23:59 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 12:23:59 -0400
Subject: How to name Exceptions that aren't Errors
In-Reply-To: <tGx5e.441$5I5.30633@newshog.newsread.com>
References: <3blfl8F6gt80jU1@individual.net>	<mailman.1502.1112902903.1799.python-list@python.org>
	<tGx5e.441$5I5.30633@newshog.newsread.com>
Message-ID: <d36b1r$f6a$1@sea.gmane.org>

Leif K-Brooks wrote:
> Steve Holden wrote:
> 
>> I've even used an exception called Continue to overcome an irksome
>> restriction in the language (you used not to be able to continue a
>> loop from an except clause).
> 
> 
> Out of curiosity, how could you use an exception to do that? I would 
> think you would need to catch it and then use "continue", which wouldn't 
> be possible because of the restriction you were trying to work around in 
> the first place.

As long as the exception-handling code doesn't break then the loop 
automatically continues, so the trick was (IIRC) to have a loop body 
that essentially looked like this:

for item in somelist:
     try:
         {loop body}
     except Continue:
         pass

Then exceptions caught inside the loop body (which obviously had nested 
try: clauses) could raise Continue inside their except: clause to 
restart the loop at the next iteration.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From rogerb at rogerbinns.com  Sun Apr 24 23:06:39 2005
From: rogerb at rogerbinns.com (Roger Binns)
Date: Sun, 24 Apr 2005 20:06:39 -0700
Subject: Decent Win32All Documentation
References: <1114334447.365988.197870@o13g2000cwo.googlegroups.com>
Message-ID: <tf3uj2-8cg.ln1@home.rogerbinns.com>


"Harlin Seritt" <harlinseritt at yahoo.com> wrote in message news:1114334447.365988.197870 at o13g2000cwo.googlegroups.com...
> Does anyone know of any decent documenation on Mark Hammond's win32all
> modules? I have tried looking at the documentation .chm file that comes
> with it, Python Programming On Win32 (OReilly book) and ActiveState's
> documentation and have found them all lacking -- yes I need it broken
> down to me.

I stringly recommend the platform sdk which includes documentation of
*ALL* Windows APIs, sample code etc.  It is very easily searchable.
win32all is a very thin wrapper over the underlying Windows API.

http://www.microsoft.com/msdownload/platformsdk/sdkupdate/

Roger 




From garykpdx at hotmail.com  Thu Apr 28 17:26:03 2005
From: garykpdx at hotmail.com (garykpdx at hotmail.com)
Date: 28 Apr 2005 14:26:03 -0700
Subject: unicode encoding problem
Message-ID: <1114723563.553068.115410@z14g2000cwz.googlegroups.com>


Every time I think I understand unicode, I prove I don't.

I created a variable in interactive mode like this:
s = u'?'
where this character is the a-umlaut
that worked alright. Then I encoded it like this:
s.encode( 'latin1')

and it printed out a sigma (totally wrong)

then I typed this:
s.encode( 'utf-8')

Then it gave me two weird characters +?

So how do I tell what encoding my unicode string is in, and how do I
retrieve that when I read it from a file?



From andre.roberge at gmail.com  Sat Apr 23 20:47:07 2005
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9_Roberge?=)
Date: Sat, 23 Apr 2005 21:47:07 -0300
Subject: Using Ming on Windows
In-Reply-To: <426AE150.5030109@sympatico.ca>
References: <d4ea01$m02$1@sea.gmane.org>	<mailman.2356.1114287722.1799.python-list@python.org>
	<426AE150.5030109@sympatico.ca>
Message-ID: <d4eq11$idh$1@sea.gmane.org>

Colin J. Williams wrote:
> Jack Diederich wrote:
> 
>> On Sat, Apr 23, 2005 at 05:13:29PM -0300, Andr? Roberge wrote:
>>
>>> I tried to install Ming
>>> (http://sourceforge.net/projects/ming/)
>>> on Windows to use with Python *but*
>>> I can't [/don't know how to] use "make" to install it.
>>>

> I installed MinGW on a Windows XP with no trouble.  One needs to install 
> MSYS, as well as MinGW, since some modules (eg. make) are only available
> in MSYS.
> 
> Currently, I am trying to build a package from source and have some 
> unresolved problems.  Earlier I had tried to use the Borland 
> commandline, without success.
> 
> Colin W.

MinGW is a minimalistic Gnu for Windows.

Ming is a Flash/swf library.

A.



From dbasch at yahoo.com  Wed Apr 27 14:19:31 2005
From: dbasch at yahoo.com (Derek Basch)
Date: 27 Apr 2005 11:19:31 -0700
Subject: List comprehension and FieldStorage
In-Reply-To: <b8OdnahH79AuS_LfRVn-jQ@powergate.ca>
References: <1114552736.288675.248070@g14g2000cwa.googlegroups.com>
	<1114624635.234561.96390@o13g2000cwo.googlegroups.com>
	<b8OdnahH79AuS_LfRVn-jQ@powergate.ca>
Message-ID: <1114625971.829691.257300@z14g2000cwz.googlegroups.com>

Sorry Peter. I will refrain from nudging in the future. I did spend
time at the interactive prompt and got nothing. Maybe I will have
better luck next time.



From sylvain.thenault at logilab.fr  Thu Apr 14 11:29:43 2005
From: sylvain.thenault at logilab.fr (Sylvain Thenault)
Date: Thu, 14 Apr 2005 17:29:43 +0200
Subject: connection refused when uploading a package to pypi
Message-ID: <pan.2005.04.14.15.29.42.428910@logilab.fr>

Hi !
I got a connection refused when I try to upload a package using "python
setup.py register". However login using the web interface works well. Does
anyone has the same problem or is it a problem on my side ?


syt at musca:pylint$ python setup.py register
running register
We need to know who you are, so please choose either:
 1. use your existing login,
 2. register as a new user,
 3. have the server generate a new password for you (and email it to you), or
 4. quit
Your selection [default 1]:
Username: logilab
Password:
Server response (500): <urlopen error (111, 'Connection refused')>

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From fredrik at pythonware.com  Fri Apr 22 17:00:05 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 23:00:05 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com><EFj8e.809$E57.495@fe51.usenetserver.com><pan.2005.04.20.10.08.25.97524@gmail.com><f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA><pan.2005.04.22.11.48.13.138980@gmail.com><pan.2005.04.22.13.22.14.591804@gmail.com><mailman.2282.1114177844.1799.python-list@python.org><pan.2005.04.22.13.56.27.343483@gmail.com><pan.2005.04.22.17.25.06.536391@gmail.com><mailman.2296.1114191795.1799.python-list@python.org><pan.2005.04.22.18.02.15.156790@gmail.com>
	<d4bns2$ksb$1@sea.gmane.org>
Message-ID: <d4bobr$mg6$1@sea.gmane.org>


> order.  but if you do record.findall(".//Dbtag"), you get a list of all Dbtag
> elements

make that "you get a list of all Dbtag elements in that record"

</F>




From gandalf at geochemsource.com  Mon Apr 11 03:45:52 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Mon, 11 Apr 2005 09:45:52 +0200
Subject: python modules in home dir
In-Reply-To: <1113086535.508461.79970@l41g2000cwc.googlegroups.com>
References: <8416c258.0504091309.7ba2047d@posting.google.com>
	<1113086535.508461.79970@l41g2000cwc.googlegroups.com>
Message-ID: <425A2B30.1020902@geochemsource.com>

wittempj at hotmail.com wrote:

>set the PYTHON_PATH to include your home directory
>  
>
Its correct name is 'PYTHONPATH'.
Under C shell:

setenv PYTHONPATH /home/yourlogin/pythonlibs

Under bourne/bash:

set PYTHONPATH=/home/yourlogin/pythonlibs
export PYTHONPATH


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From merkosh at hadiko.de  Tue Apr 12 07:16:51 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 13:16:51 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
Message-ID: <d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 12:09 pm Michele Simionato wrote:

> Steven Bethard:
>> It strikes me that I've never wanted or needed a singleton object.
>> Would you mind sharing your use case?  I'm just curious.
> 
> "Singleton" is the most idiotic pattern ever. If you want an instance,
> just
> instantiate your class once. If a class should have only one instance,
> you can just document it. What I find usuful is "memoize", which
> contains "Singleton" as a special case. So I use memoize even
> for singleton would-be, i.e. logfiles and databases connections
> (memoizing the connections, if I try to open a database twice with the
> same parameters, I am returned an instance of the already opened
> database).

"Singleton" is simple (like the wheel), but that does not make it stupid.
There are two aspects that are important:

1. a Singleton has one, very simple property and virtually everyone knows
what you talk about when you explain that you used a "Singleton". In this
case its just a technical term. We need technical terms.

2. the property of a Singleton, i.e. there is only one, is important - you
use it yourself through memoize. That is just a more flexible
implementation of having one instance of whatever you memoize.

Using @memoize on the __new__ method works very well and is flexible enough
to be used with any function call. Thanks for the tip.

Ciao
Uwe     


From jbo at cannedham.ee.ed.ac.uk  Mon Apr  4 07:23:47 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Mon, 04 Apr 2005 12:23:47 +0100
Subject: import and scope inconsistency?
In-Reply-To: <mailman.1287.1112611938.1799.python-list@python.org>
References: <d2r4j1$ggn$1@scotsman.ed.ac.uk>
	<mailman.1287.1112611938.1799.python-list@python.org>
Message-ID: <d2r83b$h7v$1@scotsman.ed.ac.uk>

Heiko Wundram wrote:
> You're putting a Reply-To header in your posts to the mailing-list, but the 
> Reply-To address bounces.
> 
> Please correct: on't put in a Reply-To header, or at least put in some address 
> that doesn't bounce.
> 
Thanks


From kristof at rubin.hu  Thu Apr  7 09:46:58 2005
From: kristof at rubin.hu (=?ISO-8859-1?Q?Krist=F3f_Str=F3bl?=)
Date: Thu, 07 Apr 2005 15:46:58 +0200
Subject: import statement - package visibility problem
In-Reply-To: <42550CB9.8060309@geochemsource.com>
References: <42550CB9.8060309@geochemsource.com>
Message-ID: <425539D2.2020001@rubin.hu>

Hi!

Laszlo Zsolt Nagy wrote:
> 
> I have the following structure:
> 
> 
> /Lib/Server/Db/
>    __init_.py
>    DatabaseConnection.py
>    Adapters/
>       __init__.py
>       FireBirdConnection.py
> 
> Important file contents are:
> 
> /Lib/Server/Db/__init__.py:
> 
>    import DatabaseConnection
>    import Adapters
> 
> /Lib/Server/Db/DatabaseConnection.py:
> 
>    class DatabaseConnection(object):
>          pass
> 
> 
> /Lib/Server/Db/Adapters/__init__.py
> 
>    import FireBirdConnection
> 
> /Lib/Server/Db/Adapters/FireBirdConnection.py:
> 
>    from DatabaseConnection import DatabaseConnection
>    class FireBirdConnection(DatabaseConnection):
>           pass
> 
> ...
> 
> My problem is that Lib/Server/Db/Adapters/FireBirdConnection.py does not 
> see Lib/Server/Db/DatabaseConnection.py.

Two solutions come into my mind:

1. Do not inherit from DatabaseConnection, but pass a DatabaseConnection object as a parameter to the FireBirdConnection's __init__function. After this you can delegate the necessary functionality to the DatabaseConnection (by using __getattr__). This introduces less coupling between DatabaseConnection and FireBirdConnection, event module testing is easier.

2. Maybe the layering of your application is wrong. If DatabaseConnection provides common functionality to the different Adapters, it should be on the same layer or one beneath the Adapters.

Hard to say which can be applied to your application without knowing more about it, though.

Krist?f



From ccpela at kielo.uta.fi  Tue Apr 19 09:59:49 2005
From: ccpela at kielo.uta.fi (Petri Lankoski)
Date: 19 Apr 2005 16:59:49 +0300
Subject: Twisted for online games
References: <1113851977.195434.78980@l41g2000cwc.googlegroups.com>
Message-ID: <cdvoeca3m0a.fsf@kielo.uta.fi>

"sir.shz" <sir.shz at gmail.com> writes:
> Hi, I'm just starting to play with Twisted, and planning to use it for
> sone online games (e.g., casino games, etc.), have people done that
> before, are there any pointers? Thanks.

"Game Programming with Python" by Sean Riley has good section about
writing server-client stuff using Twisted.

-- 
  Petri Lankoski
  Hypermedia Laboratory, University of Tampere
  p. +358 3 215 7883, GSM: +358 50 329 8536
  Email: ccpela at uta.fi 	PGP: http://www.uta.fi/~ccpela/pgp.txt
 


From michele.simionato at gmail.com  Fri Apr  8 07:59:33 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Apr 2005 04:59:33 -0700
Subject: decorating functions with generic signatures (not for the faint
	of heart)
In-Reply-To: <ll7t5x9r.fsf@python.net>
References: <1112955437.518384.56960@g14g2000cwa.googlegroups.com>
	<ll7t5x9r.fsf@python.net>
Message-ID: <1112961573.633285.137410@z14g2000cwz.googlegroups.com>

Yes, this is essentially the same idea. You compile the codestring to
bytecode,
whereas I just evalue the codestring to a lambda function. We are
essentially implementing a runtime macro by hand. I wonder if there is
any alternative
approach to get the same result, without manipulation of the source
code.
BTW, I have fixed another small bug in my original code. 'decorator'
should read

import inspect

def decorate(func, caller):
    args, varargs, varkw, defaults = inspect.getargspec(func)
    argdefs = defaults or ()
    argcount = func.func_code.co_argcount
    varnames = args + (varargs or []) + (varkw or [])
    signature = ", ".join(_signature_gen(varnames, len(argdefs),
argcount))
    variables = ", ".join(_signature_gen(varnames, len(argdefs),
argcount,
                                        rm_defaults=True))
    lambda_src = "lambda %s: call(func, %s)" % (signature, variables)
    print func.__name__, "->", lambda_src
    dec_func = eval(lambda_src, dict(func=func, call=caller,
arg=argdefs))
    dec_func.__name__ = func.__name__
    dec_func.__doc__ = func.__doc__
    dec_func.__dict__ = func.__dict__.copy()
    return dec_func



From cookedm+news at physics.mcmaster.ca  Thu Apr  7 16:16:36 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 07 Apr 2005 16:16:36 -0400
Subject: richcmpfunc semantics
References: <mailman.1443.1112810784.1799.python-list@python.org>
	<3bkgpnF6d50ppU1@individual.net>
	<mailman.1480.1112872640.1799.python-list@python.org>
Message-ID: <qnkk6negx5n.fsf@arbutus.physics.mcmaster.ca>

harold fellermann <harold.fellermann at upf.edu> writes:

> Thank you Greg,
>
> I figured most of it out in the meantime, myself. I only differ
> from you in one point.
>
>>> What has to be done, if the function is invoked for an operator
>>> I don't want to define?
>>
>> Return Py_NotImplemented. (Note that's return, *not* raise.)
>
> I used
>
> PyErr_BadArgument();
> return NULL;
>
> instead. What is the difference between the two and which one
> is to prefer.

If you do it your way you're a bad neighbour: If your object is the
first one (left-hand side) of the operator, it will prevent the other
object from handling the case if it can. This is the same advice as
for all of the other operators (__add__, etc.)

Consider the pure-python version:

class A:
    def __init__(self, what_to_do='return'):
        self.what_to_do = what_to_do
    def __eq__(self, other):
        print 'A.__eq__'
        if self.what_to_do == 'return':
            return NotImplemented
        else:
            raise Exception

class B:
    def __eq__(self, other):
        print 'B.__eq__'
        return True

>>> a = A('return')
>>> b = B()
>>> a == b
A.__eq__
B.__eq__
True
>>> b == a
B.__eq__
True
>>> a == a
A.__eq__
A.__eq__
A.__eq__
A.__eq__
True

So the B class handles the case where A doesn't know what to do. Also
note the last case, where Python falls back on id() comparisions to
determine equality.

Now, compare with this:

>>> a = A('raise')
>>> b = B()
>>> a == b
A.__eq__
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "x.py", line 9, in __eq__
    raise Exception
Exception
>>> b == a
B.__eq__
True
>>> a == a
A.__eq__
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "x.py", line 9, in __eq__
    raise Exception
Exception

So now comparing A and B objects can fail. If you *know* A and B
objects can't be compared for equality, it'd be ok to raise a
TypeError, but that should be after a type test.

> Also, do you need to increment the reference count
> of Py_NotImeplemented before returning it?

Yes; it's a singleton like Py_None.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From programmer.py at gmail.com  Fri Apr 22 14:14:26 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Fri, 22 Apr 2005 13:14:26 -0500
Subject: gui developing
In-Reply-To: <1114191709.671893.254560@o13g2000cwo.googlegroups.com>
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<1114191709.671893.254560@o13g2000cwo.googlegroups.com>
Message-ID: <d52c72d205042211146c765e29@mail.gmail.com>

Python Card wraps around wxPython.

wxPython is a wrapper around wxWidgets.  Because of this, it may not
feel very "pythonic."

I personally really like wxPython -- heck it is borderline love! 
wxPython isn't that hard to pick up and the folks on the mailing list
are especially helpful.  wxPython's creator, Robin Dunn doesn't seem
to sleep or eat and is constantly answering questions.  No, I'm
serious Robin doesn't eat or sleep -- I'm still trying to find someone
who has actually met him.  I personally believe he is a robot.

Be warned though, that some people question the
"cross-platformability" of wxPython.  I've been doing GUI stuff
exclusively for windows, so I can't really speak to this.

jw

On 22 Apr 2005 10:41:49 -0700, codecraig <codecraig at gmail.com> wrote:
> I am fairly new to Python as well.  However, coming from a Java
> background and Swing...I jumped into Jython.  It let me use my previous
> swing knowledge to make GUI's.  However, python comes with Tkinter
> which is the 'standard' gui library.  I'd suggest checking out Tkinter,
> but i dont have much experience with others.
> 
> some other ones I have heard about... wxWidgest, and Python Card
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gsakkis at rutgers.edu  Tue Apr 19 13:41:31 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 19 Apr 2005 10:41:31 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<mailman.2066.1113863546.1799.python-list@python.org>
	<1113898210.973052.255840@l41g2000cwc.googlegroups.com>
	<mailman.2102.1113918923.1799.python-list@python.org>
Message-ID: <1113932491.072447.146420@o13g2000cwo.googlegroups.com>

"Fran?ois Pinard" wrote:
>
> I started recently to study the R system and language, and saw many
good
> ideas in there about argument passing.  Translated in Python terms,
it
> would mean that `*varargs' and `**keywords' are not necessary last,
> that named keywords may be intermixed with positional keywords, that

This would be neat indeed. Occasionally I come across situations where
I wished to be able to specify default arguments after positional, as
for example in "def accumulate(*items, default=0)". The current
possible workarounds are:
- pass an iterable instead of positional arguments: "def
accumulate(items, default=0)". This is not always elegant, especially
if the function is called with few independently derived items (as
opposed, for example, to items derived by a list/generator
comprehension, which is already an iterable).
- pass named keywords instead of default: "def accumulate(*items,
**kwds)". I tend to think of **kwds as a nice feature for functions
with almost open-ended functionality, that intend to be extended in the
future with more customization options. In more typical cases though of
a function with one or two defaults, using **kwds obscures the
function's signature without a visible benefit. Also, I'm not sure of
the efficiency penalty imposed by constructing and passing a dict of
length 1 or 2 instead of default arguments.
- Put the default(s) before the positional arguments: "def
accumulate(default=0, *items)". This practically negates the purpose of
using defaults in the first place since the first passed argument is
bounded to default.

Allowing non-default arguments after *varargs doesn't make sense, but
it does for default arguments. The parameter binding rule would just
need to be augmented so that default parameter arguments after *varargs
would be bounded to their default value unless specified explicitly in
the call as named arguments:
accumulate(1,2) == accumulate(1,2 default=0) and
accumulate([1],[2],default=[]) == accumulate([1],default=[], [2])  ==
accumulate(default=[], [1], [2])

> keywords may be abbreviated, and much more hairy,

Hmm.. -1 on this. It may save a few keystrokes, but it's not good for
readability and maintenability.

> that the default
> values for keywords are not pre-evaluated at `def' time, and that


Definitely a +1 on this. I've always seen pre-evaluation as a wart,
especially with respect to mutable default values. If some sort of
state needs to be preserved between calls, the right way is to
encapsulate it in class, not in a default value.

> the computation of actual expressions given as arguments is lazily
> postponed until their first use within the function.

Is this like an implicit lambda before each argument ? If so, why does
it have to be restricted to function arguments ? It seems to me that
argument passing and lazy evaluation are orthogonal dimensions. Let's
keep the "should python become lazy ?" question for a future thread :-)

Concerning default argument expressions, a neat feature would be to
allow an expression to refer to other arguments, as in "def
foo(a,b,s=a+b)" instead of the current workaround which goes like:
def foo(a,b,s=None):
    if s is None: s = a+b
Or for a more exotic use:
def prologLikeSum(a=s-b, b=s-a, s=a+b):
    return a,b,s
prologLikeSum(1,2) == prologLikeSum(1,s=3) == prologLikeSum(b=2,s=3) ==
(1,2,3)

This seems pretty hard to change though. For one thing, it would
require new syntax to denote which names in the expression refer to
other arguments instead of the enclosing scope. Also the binding of
arguments to values would no more be considered "parallel"; the order
of the bindings would be significant, and even worse, it would have to
be computed for each call, as the prologLikeSum example shows.

Probably-I'm-just-rambling-ly yrs
George



From dan.polansky at gmail.com  Wed Apr 20 03:30:35 2005
From: dan.polansky at gmail.com (Dan Polansky)
Date: 20 Apr 2005 00:30:35 -0700
Subject: To decode the Subject =?iso-8859-2?Q?=... in email in python
Message-ID: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>

When parsing messages using python's libraries email and mailbox, the
subject is often encoded using some kind of = notation. Apparently, the
encoding used in this notation is specified like =?iso-8859-2?Q?=... or
=?iso-8859-2?B?=. Is there a python library function to decode such a
subject, returning a unicode string? The use would be like

  human_readable = cool_library.decode_equals(message['Subject'])

Thank you, Dan



From deetsNOSPAM at web.de  Thu Apr 21 07:58:36 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 21 Apr 2005 13:58:36 +0200
Subject: Lex
References: <bf594e7.0504200216.303729d0@posting.google.com>
	<bf594e7.0504202350.7c380776@posting.google.com>
Message-ID: <d484ha$9cj$02$1@news.t-online.com>

jozo wrote:

> I NEED HELP!!!

Shouting won't give you help. 

Reading this

http://www.catb.org/~esr/faqs/smart-questions.html

and coming back with a more elaborate question might.

-- 
Regards,

Diez B. Roggisch


From adam_goucher at hotmail.com  Wed Apr 20 11:05:33 2005
From: adam_goucher at hotmail.com (adam)
Date: 20 Apr 2005 08:05:33 -0700
Subject: Redhat 9, Python 2.4.1, CGIHTTPServer problem
In-Reply-To: <191b8642.0504200444.7a2a3c04@posting.google.com>
References: <191b8642.0504200444.7a2a3c04@posting.google.com>
Message-ID: <1114009532.970603.129580@o13g2000cwo.googlegroups.com>

It might not be the script, but might be the environment. I've been
burned by something similar in the past when I had my CGI script in my
home dir (default +r) and didnt have the permissions correct on the
dir. Not only does the script have to be +r +x, but the dir it is in
has to be as well for the apache user.

-adam



From kent37 at tds.net  Fri Apr 22 14:55:45 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 14:55:45 -0400
Subject: Threading question
In-Reply-To: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>
References: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>
Message-ID: <42694464$1_1@newspeer2.tds.net>

codecraig wrote:
> If i have a class such as
> 
> class Foo:
>     def doSomething(self, cmd, cmd2, callback):
>         cmd = <translate command>
>         results = <..do some possibly long task..>
>         callback(results)
> 
> What I am looking to do is have that "long task" done in a separate
> thread...how can I do this?

import threading and add this method to class Foo:

   def doSomethingThreaded(self, cmd, cmd2, callback):
     threading.Thread(target=self.doSomething, args=(cmd, cmd2, callback)).start()


You also might be interested in this recipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/84317

Kent


From olaamigoquepasa at hotmail.com  Thu Apr 21 20:13:48 2005
From: olaamigoquepasa at hotmail.com (hawkesed)
Date: 21 Apr 2005 17:13:48 -0700
Subject: Dictionary question.
In-Reply-To: <mailman.2213.1114079526.1799.python-list@python.org>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
	<8c7f10c60504210317a51586@mail.gmail.com>
	<mailman.2213.1114079526.1799.python-list@python.org>
Message-ID: <1114126631.217765.162700@l41g2000cwc.googlegroups.com>

Steve,
 thanks for the input. That is actually what I am trying to do, but I
don't know the syntax for this in python. For example here is a list I
want to work with as input:
[101, 66, 75, 107, 108, 101, 106, 98, 111, 88, 119, 93, 115, 95, 114,
95, 118, 109, 85, 75, 88, 97, 53, 78, 98, 91, 115, 77, 107, 153, 108]
Here is as far as I have gotten coding:
>>> for num in alist:
... 	if adict.has_key(num):
... 		x = adict.get(num)
... 		x = x + 1
                # dont know how to update a value here
         else:
               // add key with value one here somehow.
Thats where I am at now.
For the record, I am not taking a class on python and using this forum
to do my homework. I graduated in 1999 and am trying to get familiar
with python and refresh my statistics skills. Python seems like it
would be a good language to do math/stat work in, in a lightweight way.

Thank for all the help and have a great day!
Ed



From jepler at unpythonic.net  Sun Apr  3 11:01:36 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 3 Apr 2005 10:01:36 -0500
Subject: Corectly convert from  %PATH%=c:\\X; "c:\\a;
	b"  TO  ['c:\\X', 'c:\\a; b']
In-Reply-To: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>
References: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>
Message-ID: <20050403150134.GA3398@unpythonic.net>

if your goal is to search for files on a windows-style path environment
variable, maybe you don't want to take this approach, but instead wrap
and use the _wsearchenv or _searchenv C library functions
    http://msdn.microsoft.com/library/en-us/vclib/html/_crt__searchenv.2c_._wsearchenv.asp

Incidentally, I peeked at the implementation of _searchenv in wine (an
implementation of the win32 API for Unix), and it doesn't do the
quote-processing that you say Windows does.  The msdn page doesn't give
the syntax for the variable either, which is pretty typical.  Do you
have an "official" page that discusses the syntax?

Jeff
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From jmccall at houston.rr.com  Mon Apr 18 00:31:58 2005
From: jmccall at houston.rr.com (J. W. McCall)
Date: Mon, 18 Apr 2005 04:31:58 GMT
Subject: Canceling/interrupting raw_input
Message-ID: <2LG8e.12216$hu5.4874@tornado.texas.rr.com>

I'm working on a MUD server and I have a thread that gets keyboard input 
so that you can enter commands from the command line while it's in its 
main server loop.  Everything works fine except that if a player enters 
the 'shutdown' command, everything shuts down, but the input thread is 
still sitting waiting for enter to be pressed for raw_input.  After 
enter is pressed, it exits back to the command prompt as it should.

I'm wondering if there's a way that I can make the thread stop waiting 
for input.  Even sys.exit() still leaves it waiting.  It's not a big 
deal, but it bugs me.

Any ideas?  Should I be using something other than raw_input?  I'm on 
Windows2000 and running this from the DOS prompt.  I'm using Python 2.4.


From greg at cosc.canterbury.ac.nz  Wed Apr 20 01:33:15 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 17:33:15 +1200
Subject: Behaviour of str.split
In-Reply-To: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
Message-ID: <3cm7t9F6nuiooU1@individual.net>

Will McGugan wrote:
> Hi,
> 
> I'm curious about the behaviour of the str.split() when applied to empty 
> strings.
> 
> "".split() returns an empty list, however..
> 
> "".split("*") returns a list containing one empty string.

Both of these make sense as limiting cases.

Consider

 >>> "a b c".split()
['a', 'b', 'c']
 >>> "a b".split()
['a', 'b']
 >>> "a".split()
['a']
 >>> "".split()
[]

and

 >>> "**".split("*")
['', '', '']
 >>> "*".split("*")
['', '']
 >>> "".split("*")
['']

The split() method is really doing two somewhat different things
depending on whether it is given an argument, and the end-cases
come out differently.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From aahz at pythoncraft.com  Thu Apr 28 16:18:40 2005
From: aahz at pythoncraft.com (Aahz)
Date: 28 Apr 2005 13:18:40 -0700
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<d4ge1f$n13$1@sea.gmane.org>
	<mailman.2402.1114358128.1799.python-list@python.org>
Message-ID: <d4rgf0$mkq$1@panix1.panix.com>

In article <mailman.2402.1114358128.1799.python-list at python.org>,
Fredrik Lundh <fredrik at pythonware.com> wrote:
>
>mapping += to extend is a design mistake (I guess someone got a
>little carried away).

There were two use cases that drove augmented assignment (I know you know
this -- but other people probably do not):

reallylongvariablename = reallylongvariablename + 1
hugearray = hugearray + tinyarray

The latter was particularly coming from the Numeric types.  The docs
probably should clarify that augmented assignment is *NOT* necessarily
the same as ``foo = foo + bar`` when ``foo`` is a mutable type.  You can
argue that you disagree with mapping ``+=`` to ``extend()``, but I don't
think it's fair for you to flatly claim that it's a design mistake.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"It's 106 miles to Chicago.  We have a full tank of gas, a half-pack of
cigarettes, it's dark, and we're wearing sunglasses."  "Hit it."


From grante at visi.com  Fri Apr 22 15:16:14 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 19:16:14 -0000
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
Message-ID: <116ijbu28kp0gb0@corp.supernews.com>

On 2005-04-22, Laszlo Zsolt Nagy <gandalf at geochemsource.com> wrote:

> I know there has been a post about Python licencing but I have
> different questions. I tried to Google for "Python Licence"
> and "Python Licencing" but I could not find the answer.

You must be joking.  It didn't occur to you to check the FAQ at
www.python.org?

http://www.python.org/doc/faq/general.html#are-there-copyright-restrictions-on-the-use-of-python

-- 
Grant Edwards                   grante             Yow!  We are now enjoying
                                  at               total mutual interaction in
                               visi.com            an imaginary hot tub...


From http  Fri Apr  1 23:24:55 2005
From: http (Paul Rubin)
Date: 01 Apr 2005 20:24:55 -0800
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
Message-ID: <7xmzshvm94.fsf@ruckus.brouhaha.com>

Have you looked at this?  A paper about adding asynchronous exceptions
to Python.

http://www.cs.williams.edu/~freund/papers/02-lwl2.ps


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 11:46:53 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 16:46:53 +0100
Subject: preallocate list
In-Reply-To: <op.so6ehvehpda12i@localhost>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j5t4$nqg$1@scotsman.ed.ac.uk>
	<d3j569$5tr$1@solaris.cc.vt.edu> <op.so6ehvehpda12i@localhost>
Message-ID: <d3jes1$onj$1@scotsman.ed.ac.uk>

peufeu at free.fr wrote:
> 
> what about :
> 
> factors = [map(float, line.split()) for line in file]
> 
> should be a hell of a lot faster and nicer.
> 
>>              for line in f:
>>                  factor = []
>>                  tokens = line.split()
>>                  for i in tokens:
>>                      factor.append(float(i))
>>                  factors.append(factor)
>>
>> Is this nasty?
>>
>> Jim
> 
> 
Oh the relief :)

Of course, line.split() is already a list.

Couple of seconds for the 10000 line file.

Thanks.

What I really want is a Numeric array but I don't think Numeric supports 
importing files.

Jim


From vze4rx4y at verizon.net  Thu Apr 21 03:37:41 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 21 Apr 2005 07:37:41 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
	<slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2178.1114006723.1799.python-list@python.org>
	<slrnd6ei0q.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <9LI9e.28173$1p4.20603@trndny06>

[Antoon Pardon]
> I don't see why the start index can't be accessible through
> a method or function just like the length of a list is now.
>
> My favourite would be a range method so we would have
> the following idiom:
>
>   for i in lst.range():
>     do something with lst[i]

After going to all that trouble, you might as well also get the value at that
position:

for i, x in enumerate(lst):
    do something with lst[i] also known as x


Raymond Hettinger




From ryan at ryankaskel.com  Tue Apr 26 22:38:45 2005
From: ryan at ryankaskel.com (ryan at ryankaskel.com)
Date: 26 Apr 2005 19:38:45 -0700
Subject: Can .py be complied?
In-Reply-To: <1114569158.396231.45460@z14g2000cwz.googlegroups.com>
References: <d4mq31$gq3$1@domitilla.aioe.org><426ec8f7_2@rain.i-cable.com>
	<1114569158.396231.45460@z14g2000cwz.googlegroups.com>
Message-ID: <1114569525.807638.48640@l41g2000cwc.googlegroups.com>


ryan at ryankaskel.com wrote:
> I don't know the exact details, but try using the compiled Python
> scripts (bytecode). I believe they are semi-optimized and platform
> independent. They are the .pyc and .pyo files generated when the
script
> is run.

Okay, I found this documentation
<http://fux0r.phathookups.com/programming-tutorials/Python/tut/node43.html>.
It hides the source but you still need Python installed on the system
running the bytecode.



From fredrik at pythonware.com  Mon Apr  4 04:11:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 4 Apr 2005 10:11:07 +0200
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com>
Message-ID: <d2qsmf$vpr$1@sea.gmane.org>

"lothar" wrote:

> this is a bug and it needs to be fixed.

it's not a bug, and it's not going to be "fixed".  search, findall, finditer, sub,
etc. all scan the target string from left to right, and process the first location
(or all locations) where the pattern matches.

</F> 





From greg_miller at nexpress.com  Fri Apr 15 16:20:50 2005
From: greg_miller at nexpress.com (Greg Miller)
Date: 15 Apr 2005 13:20:50 -0700
Subject: mySQL values not updating after query
In-Reply-To: <1113586764.112845.70180@f14g2000cwb.googlegroups.com>
References: <1113577745.655703.22120@l41g2000cwc.googlegroups.com>
	<1113586764.112845.70180@f14g2000cwb.googlegroups.com>
Message-ID: <1113596450.592541.15560@f14g2000cwb.googlegroups.com>

I just discovered that a few minutes ago, thanks.



From timr at probo.com  Sun Apr 17 01:05:57 2005
From: timr at probo.com (Tim Roberts)
Date: Sat, 16 Apr 2005 22:05:57 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1980.1113585414.1799.python-list@python.org>
Message-ID: <elr361h3i6obd129s860e7isoj2q9e0jdd@4ax.com>

Dick Moores <rdm at rcblue.com> wrote:

>M.E.Farmer wrote at 23:18 4/14/2005:
>>Nice collection of unix tools, Cygwin not needed.
>>http://unxutils.sourceforge.net/
>
>Thank you!
>
>But a question. I've download both UnxUtils.zip and UnxUpdates.zip. I'm 
>planning to put the contents of UnxUtils.zip in a directory and then move 
>the contents of UnxUpdates.zip, which has many of the same filenames, to 
>the same directory. Should I just let Windows replace the old files with 
>the updated ones?

Yes.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From michele.simionato at gmail.com  Fri Apr 15 00:37:07 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 14 Apr 2005 21:37:07 -0700
Subject: pythonic use of properties?
In-Reply-To: <mailman.1946.1113534329.1799.python-list@python.org>
References: <mailman.1946.1113534329.1799.python-list@python.org>
Message-ID: <1113539827.575407.297040@z14g2000cwz.googlegroups.com>

I don't use properties that much, but when I use them
I put them *outside* the class, in a property factory.
Here is an example I have prepared for my course at
PyUK, using a property to crypt a password attribute:

 class User(object):
     def __init__(self, username, password):
         self.username, self.password = username, password


 def cryptedAttribute(seed="x"):
     def get(self):
         return getattr(self, "_pw", None)
     def set(self, value):
         self._pw = crypt(value, seed)
     return property(get, set)


 User.pw = cryptedAttribute()

I feel that:

1) separation of concerns is of the utmost importance;
2) classes should be kept as short as possible.

Notice that in this design getters and setters are
really hidden from the user, which may be or may be
not what you want.

             Michele Simionato



From codecraig at gmail.com  Tue Apr 19 09:19:06 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 06:19:06 -0700
Subject: Update Label when Scale value changes
Message-ID: <1113916746.841747.274550@l41g2000cwc.googlegroups.com>

Hi,
  I am using Tkinter and I have a Label and a Scale.  I want to update
my label everytime the Scale value changes.  What is the best way of
doing this?  Do i have to bind for every event type?  Or is there some
better way?  If I do have to bind each type of event to the scale, what
types occur for a Scale?

Thanks.



From ramen at lackingtalent.com  Thu Apr 28 15:49:57 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 28 Apr 2005 12:49:57 -0700
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <XFace.17198$UX1.12035@fe08.usenetserver.com>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk> <wh8ce.142$%o.107@fed1read05>
	<d4rb04$209$1@gemini.csx.cam.ac.uk>
	<XFace.17198$UX1.12035@fe08.usenetserver.com>
Message-ID: <i9bce.1960$i73.1367@okepread03>

Paul Miller wrote:
> Michael Hoffman wrote:
> 
>> Dave Benjamin wrote:
>>
>>> I think you meant to write something like this:
>>>
>>> def attrsetter(obj, name, value):
>>>     def _return_func():
>>>         return setattr(obj, name, value)
>>>     return _return_func
>>
>>
>>
>> Sure did. Sorry.
> 
> 
> You guys have been very helpful!
> 
> While on the subject, is there an equivalent for "methodcaller"?
> 
> ie. if I want to bind a function which calls a specific method of an 
> object with a specific parameter?

You could use a combination of bound methods and the "curry" function 
defined in the Python Cookbook:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549

The examples in the discussion do just that.

Dave


From radam2 at tampabay.rr.com  Sun Apr  3 12:56:34 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sun, 03 Apr 2005 16:56:34 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424F8F0E.2010701@v.loewis.de>
	<1112515882.128422.254400@l41g2000cwc.googlegroups.com>
Message-ID: <pt605157l7s1d9ujjvt5ofu8pecuokt01l@4ax.com>

On 3 Apr 2005 00:11:22 -0800, "El Pitonero" <pitonero at gmail.com>
wrote:

>Martin v. L?wis wrote:

>Perhaps this will make you think a bit more:

Now my problem is convincing the group I do know it. LOL


>Another example:
>
>def f():
>   return f
>
>g = f()()()()()()()()()()()
>
>is perfectly valid.

Good example!  Yes, I realize it. As I said before I just haven't come
across this particular variation before using decorators so it wasn't
clear to me at first, it is now. :)

Read my reply to Bengt Richter.

Thanks, this has been a very interesting discussion.

Ron



From eldiener_no_spam_here at earthlink.net  Tue Apr  5 22:33:28 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Wed, 06 Apr 2005 02:33:28 GMT
Subject: Installing Python 2.4 on Linux
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
	<pan.2005.04.05.22.59.24.557828@gmail.com>
Message-ID: <YTH4e.979$go4.164@newsread2.news.atl.earthlink.net>

Marcin St?pnicki wrote:
> Dnia Tue, 05 Apr 2005 21:21:37 +0000, Edward Diener napisal(a):
>
>> I can install Python 2.4 on the Fedora 3 Linux system, but after I
>> do a number of Linux utilities and commands, like yum, stop working
>> because they were dependent on the Python 2.3 installation. What
>> happens is that Python 2.4 replaces the /usr/bin/python module with
>> the Python 2.4 version. If I replace /usr/bin/python with the Python
>> 2.3 version executable, which is still on my system, that all the
>> aforesaid modules depend on, they start working again, but I can no
>> longer execute modules, like IDLE, which was part of my Python 2.4
>> distribution.
>>
>> What is the solution to this ? The operating system was installed
>> with Python 2.3 and the development libraries but no tools, doc, or
>> otherwise. I have installed Python 2.4 with all the RPMs and copied
>> down the Python 2.4 documentation to my machine ( since
>> python24-docs.rpm gives one very little ). I would naturally like to
>> use Python 2.4 without killing all the commands that depend on
>> Python 2.3. No doubt these commands have their modules in the site
>> libraries for Python 2.3. Of course I would love to update these
>> dependencies to use Python 2.4 but newer RPMs for these commands do
>> not exist.
>>
>> I do not know whether this is a Python problem or a Fedora 3 problem
>> but I thought I would ask here first and see if anybody else had the
>> same problem. I imagine the problem might exist on other Linux
>> systems.
>
> It's rather Fedora related, I have Python 2.2, 2.3 and 2.4 on my
> Ubuntu box and they seem to coexist without problems.
>
> If you can afford breaking package dependencies a bit, save a copy of
> python2.3 binary somewhere and recreate it after installing Python
> 2.4

After I installed Python 2.4, the Python 2.3 executable still existed on the
system. So the only difference which occurred is that the Python 2.4
installation copied to the /usr/bin/python executable the /usr/bin/python2.4
executable ( it would seem more understandable that /usr/bin/python be a
link instead ). So there is really no need to recreate it. Essentially the
two versions co-exist on the system but only one can be /usr/bin/python and
therefore executed when a Python script is is used as a command.

>, OR make a symbolic link /usr/bin/python to /usr/bin/python2.3
> and use /usr/bin/python2.4 explicitely when you want to use the newer
> version.

Yes, this is the right solution. I am so used to just executing a Python
script that I forgot that I could just say 'python2.4 ascript.py'.

> You may also try to link modules from
> /usr/lib/python2.3/site-packages to /usr/lib/python2.4/site-packages
> (all or just few of them) - most should be upwards compatible.

By link do you simply mean moving the unique modules in the site packages
from the python2.3 directory to the python2.4 site-packages directory, or is
there something else I must do to see if they work ?

> It may
> make Fedora utilities work again (you haven't provided error
> messages, so it's hard to tell) even with Python 2.4.

The errors when executed from the command line, when python2.4 is python,
involved not being able to find modules, no doubt because they were not in
the python2.4 site-packages subdirectory. When python2.3 is python, the
modules are found and everything works. Maybe it is just a matter of moving
of copying these modules on over and seeing if that fixes things. Do
site-packages have to "register" themselves in any way during setup ? I do
not think so, but I may be wrong.




From rkern at ucsd.edu  Wed Apr 13 05:09:07 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 13 Apr 2005 02:09:07 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1793.1113334936.1799.python-list@python.org>	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1818.1113375260.1799.python-list@python.org>
	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3indk$u3h$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:

>>Yes, the license text and the copyright notice must be attached. It 
>>doesn't mean that the PSF license is the operative one for the 
>>derivative work.
> 
> 
> Why attach a license that is not operative. That doesn't make sense
> to me and will IMO just create confusion.

Because it's not your code. The tiny obligation that you have to satisfy 
is to say that some of the code comes from someone else and is available 
under such-and-such a license. That's it. You can keep the code hidden, 
you can charge whatever you like for it, but you have to attribute it 
properly. Open source licenses don't get much less restrictive than this.

>>You can put *your* own terms on top for *your* own code 
>>as long as you can satisfy the requirements of the PSF license, which 
>>are very light.
>>
>>Read Larry Rosen's book:
>>
>>   http://www.rosenlaw.com/oslbook.htm
> 
> 
> I skimmed it and it doesn't seem to contain anything that helps me
> with the PSF. If it does could you at least point me to the right
> chapter.

Well besides reading to understand the mechanics of copyright and 
licensing, you should read Chapter 5: Academic Licenses, a class of open 
source licenses to which the PSF License belongs. The only thing 
particularly different between the PSF License and most other academic 
licenses (like BSD and MIT) is that the PSF License is more explicit.

Of course, IANAL and TINLA, so if you want real legal advice instead of 
advice from random newsgroup bums like myself, you should talk to a lawyer.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From jepler at unpythonic.net  Mon Apr 18 21:13:52 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 18 Apr 2005 20:13:52 -0500
Subject: Tkinter Event Types
In-Reply-To: <1113857330.024552.245040@f14g2000cwb.googlegroups.com>
References: <1113857330.024552.245040@f14g2000cwb.googlegroups.com>
Message-ID: <20050419011352.GC10263@unpythonic.net>

The "type" field is related to the definition of different events in
X11.  In Xlib, the event structure is a "C" union with the first
(common) field giving the type of the event so that the event-dependant
fields can be accessed through the proper union member.

Generally, you won't use this field in Tkinter programs.

jeff
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From nospam at here.com  Mon Apr 25 10:27:58 2005
From: nospam at here.com (Matt Feinstein)
Date: Mon, 25 Apr 2005 10:27:58 -0400
Subject: New versions of numarray?
Message-ID: <1hvp61ttgpa9fsplvm9vkrd7io9d60vum9@4ax.com>

Hi--
I notice that there are some new versions of numarray available for
download-- is there any documentation on what's new/fixed/broken?

Matt Feinstein

--
There is no virtue in believing something that can be proved to be true.


From mwakabayashi at gmail.com  Tue Apr 19 20:51:26 2005
From: mwakabayashi at gmail.com (Mike)
Date: 19 Apr 2005 17:51:26 -0700
Subject: Writing to stdout and a log file
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
	<mailman.2142.1113957130.1799.python-list@python.org>
Message-ID: <1113958286.367038.182330@z14g2000cwz.googlegroups.com>

Thanks.

I should've mentioned I want StdoutLog to subclass the 'file' type
because I need all the file attributes available.

I could add all the standard file methods and attributes to StdoutLog
without subclassing  'file' but I'd rather avoid this if I can.



From khuranavivek_in at yahoo.com  Tue Apr  5 06:30:31 2005
From: khuranavivek_in at yahoo.com (vivek khurana)
Date: Tue, 5 Apr 2005 03:30:31 -0700 (PDT)
Subject: passing dictionary objects with soap
Message-ID: <20050405103031.59154.qmail@web40628.mail.yahoo.com>

Hi! all,

 How can i return dictionary type element from a soap
server to a client. What should be the entry <message>
section of a wsdl file.

Regards
VK

Hug the REALITY ;-)



Disclaimer
The facts expressed here belong to everybody, the opinions to me. The distinction is yours to draw...


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/ 


From phil_nospam_schmidt at yahoo.com  Fri Apr 22 15:54:14 2005
From: phil_nospam_schmidt at yahoo.com (phil_nospam_schmidt at yahoo.com)
Date: 22 Apr 2005 12:54:14 -0700
Subject: How to prevent Tkinter frame resize?
In-Reply-To: <mailman.2304.1114198867.1799.python-list@python.org>
References: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
	<mailman.2304.1114198867.1799.python-list@python.org>
Message-ID: <1114199654.333146.137830@o13g2000cwo.googlegroups.com>

That's a useful tidbit of knowledge, but it doesn't quite get at what
I'm trying to do.

I want to allow a window to be resized, limited to some maximum size.
My approach was to use the <Configure> event to capture window resize
events. Then, if the new size is larger than the maximum, I would force
it back to the maximum size by reconfiguring the height and width of
the widget.



From rune.strand at gmail.com  Wed Apr 13 06:41:31 2005
From: rune.strand at gmail.com (runes)
Date: 13 Apr 2005 03:41:31 -0700
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>
	<mailman.1819.1113380033.1799.python-list@python.org>
Message-ID: <1113388891.512839.111250@f14g2000cwb.googlegroups.com>

Seems like criticising the manual is som kind of heresy.  So be it.

You know, the Re documentation contains many pages. Ufortunately I
didn't dwell with the first introductory paragraph, I was trying to
solve a particular problem. I'm not that used to looking for links to
external sources in the manual either. Unable? I wasn't looking for a
Howto in the manual. And frankly, 'python regex howto" in Google is
quicker way.

Of course I cannot suggest a better place for the link.

Writing technical documents always trigger the question: Who is the
audience. I accept that I may not be the primary audience.  If I should
suggest anything, it would be that the examples section is expanded.

Generally: I have got my experiences with the Python Manual over the
the last 30 months Python beeing my preferred language. One of them is
that I have to look elsewhere.



From martijn at gamecreators.nl  Thu Apr 14 10:37:11 2005
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 14 Apr 2005 07:37:11 -0700
Subject: Get the entire file in a variable - error
Message-ID: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>

H!

I'm using a database and now I want to compress a file and put it into
the database.

So I'm using gzip because php can open the gzip file's.
The only problem is saving the file into the database.

The function below does this:
- gzip the file [oke]
- get all the bytes with tst.getvalue() [error]
I only get the first line.

I have the same problem when I try it with file.open(), .read().

"how to get all the binary data in a variable to put that in a database
LONG field?"

Thank's

def compressFILE(sid,filedata):
    tst = StringIO.StringIO()

    #tmp
    zip = gzip.GzipFile(str(sid)+'.gz','w',5,tst)
    zip.write(filedata)

    #put every byte in a database
    print tst.getvalue()

    zip.close()
    tst.close()

    return



From rbt at athop1.ath.vt.edu  Mon Apr 11 19:15:10 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Mon, 11 Apr 2005 19:15:10 -0400
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <d3f0dl$g28$1@solaris.cc.vt.edu>

Kanthi Kiran Narisetti wrote:
> Hi All,
> 
> I am Windows Systems Administrator(planning to migrate to Linux
> administration in near future), I have occassionally written few batch
> files and Vbscripts to automate my tasks.
> 
> Now I have strong interest to learn a programming language that would
> help me to write Scripts or Application ( In Systems Administrative
> point of view) .
> 
> I have read on net that Python is the best way to start of for beginers
> , Please let me your suggestions and help me out to chose to the right
> programming language to write scripts ranging from simple automation
> scripts to appliations for my workflow.
> 
> I am confused to chose between C++,Python,Perl.
> 
> Thanks in Advance
> 
> Kk
> 

I use Python for all sorts of Windows administration tasks. I can honestly say that 
I've yet to find a better Windows scripting language. I've used it to migrate Mac 
users to PCs (file conversions), laptop location reporting (ipconfig, route, etc.)... 
to help recover stolen laptops, and most recently a social security number search 
utility to identify files that should be safe guarded from identity theft hacks. See 
the latter here:

http://filebox.vt.edu/users/rtilley/public/find_ssns/find_ssns.html

In short, Python is the ideal language for scripting/programming on Windows computers.

Best of luck,

rbt


From tiissa at nonfree.fr  Wed Apr 20 17:47:50 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 23:47:50 +0200
Subject: pyGTK on Mouse over event ?
In-Reply-To: <1114029300.082094.293410@g14g2000cwa.googlegroups.com>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
	<4266baf3$0$7208$626a14ce@news.free.fr>
	<1114029300.082094.293410@g14g2000cwa.googlegroups.com>
Message-ID: <4266ce05$0$7200$626a14ce@news.free.fr>

Domenique.Tilleuil at gmail.com wrote:
> def __init__(self):
>     xml = gtk.glade.XML("/home/domenique/project1.glade")
>     self.window = xml.get_widget("window1")
>     self.img = xml.get_widget("image1")
>     self.img.set_from_file("./test.svg")
>     self.img.show()
>     self.img.add_events(gtk.gdk.BUTTON_MOTION_MASK)
>     xml.signal_autoconnect({
> 	'on_window1_delete_event': self.on_window1_delete_event,
> 	'on_window1_destroy_event': self.on_window1_destroy_event,
> 	'on_image1_motion_notify_event': self.on_image1_motion_notify_event,
> 	'on_image1_button_press_event': self.img_key_press,
>     })
> 
> This is the code so far. i've added the MOTION MASK to the image
> widget, is that what u ment ?
> 
Actually I read too fast. I meant BUTTON_PRESS_MASK (not motion) for the 
button_press_event.
For motion_notify_event, I guess it would be POINTER_MOTION_MASK (not 
button).



From fredrik at pythonware.com  Wed Apr 13 04:10:23 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 10:10:23 +0200
Subject: Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com><1113340181.174797.132250@f14g2000cwb.googlegroups.com><u9io519uc5upv93l6sd8ssddbhdi50a41f@4ax.com>
	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>
Message-ID: <d3ijvf$k4n$1@sea.gmane.org>

"runes" <rune.strand at gmail.com> wrote:

> I found the Howto through Google. Somehow I didn't see that link in the
> documentation.
>
> And please do not make any assumptions about my  reading of manuals.

if you were unable to find a link in the documentation you were reading, can you
perhaps suggest a better place to put that link?

</F> 





From skip at pobox.com  Tue Apr 26 13:40:00 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 26 Apr 2005 12:40:00 -0500
Subject: regex over files
In-Reply-To: <426E021E.8000809@jessikat.fsnet.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
Message-ID: <17006.31984.182979.430076@montanaro.dyndns.org>


    Robin> So we avoid dirty page writes etc etc. However, I still think I
    Robin> could get away with a small window into the file which would be
    Robin> more efficient.

It's hard to imagine how sliding a small window onto a file within Python
would be more efficient than the operating system's paging system. ;-)

Skip


From exogen at gmail.com  Thu Apr 28 05:49:34 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 28 Apr 2005 05:49:34 -0400
Subject: Which IDE is recommended?
In-Reply-To: <d4qb1m$59u$3@eeyore.INS.cwru.edu>
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
	<d4qb1m$59u$3@eeyore.INS.cwru.edu>
Message-ID: <d4qbjb$7qf$1@eeyore.INS.cwru.edu>

Brian Beck wrote:
> I realize 0.9.3 is the latest release, but the installation fails
> through the Eclipse updater:
> 
> Unable to complete action for feature "PyDev for Eclipse" due to errors.
>   Unable to create file
> "/opt/eclipse-extensions-3/eclipse/plugins/org.python.pydev_0.9.3/PySrc/SocketTestRunner.py".
> [/opt/eclipse-extensions-3/eclipse/plugins/org.python.pydev_0.9.3/PySrc/SocketTestRunner.py
> (No such file or directory)]

Okay, sorry for spamming the newsgroup so much, but I installed 0.9.3
properly and the same issues I mentioned before persist. Code completion
for imports or locals don't work at all -- the space thing was PyDev
just listing all the built-ins, with none of my modules or locals
included in the list.

--
Brian Beck
Adventurer of the First Order


From simon.brunning at gmail.com  Tue Apr  5 04:51:55 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 5 Apr 2005 09:51:55 +0100
Subject: StopIteration in the if clause of a generator expression
In-Reply-To: <Uul4e.2689$7b.1684@trndny04>
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com> <_2R3e.3341$7b.3033@trndny06>
	<uqednS7IkJQ69M3fRVn-qQ@comcast.com> <eOg4e.2512$7b.37@trndny04>
	<fqqdnVdRvpeXM8zfRVn-2g@comcast.com> <Uul4e.2689$7b.1684@trndny04>
Message-ID: <8c7f10c60504050151134aeb26@mail.gmail.com>

On Apr 5, 2005 2:04 AM, Raymond Hettinger <vze4rx4y at verizon.net> wrote:
> [Steven Bethard]
> > So do I read this right in preferring
> >      [<x> for <y> in <z>]
> > over
> >      list(<x> for <y> in <z>)
> 
> Yes!

Why? (Serious question. I'm sure that you have a good reason - I just
can't figure out what it is.)

The generator expression has the advantage of not leaking references
into the enclosing namespace. What's advantage of the list comp?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From exarkun at divmod.com  Fri Apr 29 14:10:54 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Fri, 29 Apr 2005 18:10:54 GMT
Subject: Reusing object methods?
In-Reply-To: 0
Message-ID: <20050429181054.15422.884600627.divmod.quotient.8151@ohm>

On Fri, 29 Apr 2005 19:45:54 +0200, Ivan Voras <ivoras at _-_fer.hr> wrote:
>
>Can this be done: (this example doesn't work)
>
>----
>class A:
>
>     def a_lengthy_method(self, params):
>          # do some work depending only on data in self and params
>
>class B:
>
>     def __init__(self):
>         self.a_lengthy_method = A.a_lengthy_method
>         # I know that data in "self" of class B object is compatible
>         # with that of class A object
>----
>
>I want to 'reuse' the same method from class A in class B, and without 
>introducing a common ancestor for both of them - is this possible in an 
>elegant, straightforward way?

  This is what sub-classing is for.  If it makes you feel better, call it "mixing in" instead.  You can share this method between two classes without inheritance (by defining a free function and then ...), but using a common base class really is just the right way to do it.

  Jp


From willitfw at gmail.com  Wed Apr 20 13:39:37 2005
From: willitfw at gmail.com (willitfw)
Date: 20 Apr 2005 10:39:37 -0700
Subject: Resolving 10060, 'Operation timed out'
Message-ID: <1114018777.408294.304200@z14g2000cwz.googlegroups.com>

Does anyone know how to prevent this error from occurring: IOError:
[Errno socket error] (10060, 'Operation timed out').

I am using the following code without any luck.  Obviously I am missing
something.

import socket
socket.setdefaulttimeout(20)

Thank you in advance.

Tom Williams



From mesteve_bpleaseremovethis at hotmail.com  Wed Apr  6 20:08:13 2005
From: mesteve_bpleaseremovethis at hotmail.com (StvB)
Date: Thu, 07 Apr 2005 00:08:13 GMT
Subject: Harvestman install not working
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
	<1112811970.231676.122830@g14g2000cwa.googlegroups.com>
Message-ID: <NR_4e.19552$zl.4126@newssvr13.news.prodigy.com>

Thanks Anand, (both for writing Harvest,  and for the reply.)
By the way, I did try that, so that the command is:

c:\python23\python.exe install.py py2exe -O2 --packages=encodings

And this time the dist folder was created, but there were only these files
in there:

library.zip
python23.dll
unicodedata.pyd
w9xpopen.exe
zlib.pyd
_sre.pyd

I'll keep trying though.



"Anand" <abpillai at gmail.com> wrote in message 
news:1112811970.231676.122830 at g14g2000cwa.googlegroups.com...
> Hi
>
>    Latest version of py2exe does not support the option
> --force-imports anymore I think. You can edit the .bat file to remove
> that option. It should work.
>
> -Anand
> 




From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 09:13:52 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 14:13:52 +0100
Subject: preallocate list
In-Reply-To: <d3j569$5tr$1@solaris.cc.vt.edu>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j569$5tr$1@solaris.cc.vt.edu>
Message-ID: <d3j5t4$nqg$1@scotsman.ed.ac.uk>

rbt wrote:
> Jim wrote:
> 
>> If I have a file with a floating point number on each line, what is 
>> the best way of reading them into a list (or other ordered structure)?
>>
>> I was iterating with readline and appending to a list but it is taking 
>> ages.
> 
> 
> Perhaps you should use readlines (notice the s) instead of readline.

I don't know if I thought of that, but I'm tokenizing each line before 
adding to a list of lists.

             for line in f:
                 factor = []
                 tokens = line.split()
                 for i in tokens:
                     factor.append(float(i))
                 factors.append(factor)

Is this nasty?

Jim


From werner_DOT_merkl_ at _fujitsu_DASH_siemens.com  Wed Apr 13 07:48:27 2005
From: werner_DOT_merkl_ at _fujitsu_DASH_siemens.com (Werner Merkl)
Date: Wed, 13 Apr 2005 13:48:27 +0200
Subject: Has Python 2.4.1 changed implementation for __init__.py???
Message-ID: <d3j0uc$fak$1@nntp.fujitsu-siemens.com>

Hallo,


I just downloaded http://www.python.org/pypi/xexpr/0.02, installed
if (python setup.py install) and tried the example in the README file.

Than I got following error: AttributeError: 'module' object has no 
attribute 'Read'

This is same behavior for all module using empty __init__.pr files,
like venster, Pyrex or libxmlmods...

Is there a change in the implementation, so that every module needs an
explicit list for exchanged modules? Or is there a switch or an
environment variable to change?


Thanks a lot
Werner


EXAMPLE
------------------------------------------------------------------------

Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import xexpr
 >>> example = '<foo a="b" c="d"><bar><baz a="d" />Blah</bar></foo>'
 >>> xexpr.Read.to_xexpr(example)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'Read'
 >>>


From electric.sunrise at gmail.com  Wed Apr  6 17:01:26 2005
From: electric.sunrise at gmail.com (Matt@revera)
Date: 6 Apr 2005 14:01:26 -0700
Subject: Overwrite just one line? Am I a n00b or is this impossible? Both? :D
Message-ID: <1112821286.411004.225400@f14g2000cwb.googlegroups.com>

I'd like to overwrite just one line of a binary file, based on a
position set by seek().  Is there no way to do this? As far as I can
tell I need to read the whole file, change the line, and write it all
back out.  Not exactly easy on the memory, but I see no other solution.

so far:

	patchme.seek(offset)
	patchme.write(a2b_hex(edit)) # the data is in hex first
	patchme.close
	print "Patching complete"

This writes the data at the given offset, but _everything_ before it is
filled with 0's.

Sorry for the potentially n00b question, I'm stumped!



From fredrik at pythonware.com  Wed Apr 27 11:20:46 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 27 Apr 2005 17:20:46 +0200
Subject: compile shebang into pyc file
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com><1114564551.358418.15350@g14g2000cwa.googlegroups.com>
	<fb66056705042707372695904d@mail.gmail.com>
Message-ID: <d4oaa8$npq$1@sea.gmane.org>

Michael Soulier wrote:

> > Is there some reason why you want to run the .pyc file, rather than the
> > .py file? If you start the script with
> 
> a. It's more efficient, since the code doesn't need to be compiled
> before it's run.
> b. What if you want to ship closed-source?

    #!/usr/bin/env python
    import app

hardly qualifies as "hard to compile" or "open source"

</F>



From steve at holdenweb.com  Sat Apr  2 00:37:30 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 02 Apr 2005 00:37:30 -0500
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d2kqqt$ss7$1@panix2.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<pan.2005.04.01.15.50.51.219430@jerf.org>	<iUe3e.21015$d5.156054@newsb.telia.net>	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
Message-ID: <d2lavn$shg$1@sea.gmane.org>

Aahz wrote:
> In article <mailman.1192.1112376393.1799.python-list at python.org>,
> =?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
> 
>>[Sunnan]
>>
>>>[...] for Pythons ideal of having one canonical, explicit way to
>>>program.
>>
>>No doubt it once was true, but I guess this ideal has been abandoned a
>>few years ago.
>>
>>My honest feeling is that it would be a mis-representation of Python,
>>assertng today that this is still one of the Python's ideals.
> 
> 
> Mind providing evidence rather than simply citing your feelings?  Yes,
> there's certainly redundancy in Python right now, but a large portion of
> that will go away in Python 3.0.  So where's the abandonment of the
> ideal?

Mind providing evidence rather than citing your opinions? I don't see 
any evidence that Python 3.0 will adopt Turing-machine-like canonical 
algorithms, and anything more complex is (at least from a theoretical 
point of view) merely syntactic sugar.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From onurb at xiludom.gro  Fri Apr 15 08:36:23 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 15 Apr 2005 14:36:23 +0200
Subject: Using python from a browser
In-Reply-To: <KLB7e.1128$JJ2.131@newssvr12.news.prodigy.com>
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<425eca46$0$865$636a15ce@news.free.fr>
	<KLB7e.1128$JJ2.131@newssvr12.news.prodigy.com>
Message-ID: <425fb548$0$10370$636a15ce@news.free.fr>

Philippe C. Martin wrote:
> Hi,
> 
> 
>>>What do  you mean ? Is  that a client-side or server-side script ?
> 
> 
> Client side
> 
So I can't help you...

> 
>>>Where ?
> 
> Programming Python - O'Reilly - 2nd edition - by Mark Lutz - Paragraph
> "Teaching IE about Python" - Pages 922-925
> 
Thanks, I'll have a look one day.

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


From sjmachin at lexicon.net  Tue Apr 26 18:43:58 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 27 Apr 2005 08:43:58 +1000
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
	<d4l92e$9di$05$1@news.t-online.com>
	<8d7dabda.0504261239.37952804@posting.google.com>
Message-ID: <8aft611878hr6d3an0n55rbk23mm71hpht@4ax.com>

On 26 Apr 2005 13:39:26 -0700, dmbkiwi at gmail.com (dumbkiwi) wrote:

>Peter Otten <__peter__ at web.de> wrote in message news:<d4l92e$9di$05$1 at news.t-online.com>...
>> Dumbkiwi wrote:
>> 
>> >> Just encode the data in the target encoding before passing it to
>> >> os.popen():

>
>Anyway, from your post, I've done some more digging, and found the
>command:
>
>sys.setappdefaultencoding()
>
>which I've used, and it's fixed the problem (I think).
>

Dumb Kiwi, eh? Maybe not so dumb -- where'd you find
sys.setappdefaultencoding()? I'm just a dumb Aussie [1]; I looked in
the 2.4.1 docs and also did import sys; dir(sys) and I can't spot it.

In any case, how could the magical sys.setappdefaultencoding() fix
your problem? From your description, your problem appeared to be that
you didn't know what encoding to use.

What is the essential difference between

   send(u_data.encode('polish'))

and

   sys.setappdefaultencoding('polish')
   ...
   send(u_data)

[1]: Now that's *TWO* contenders for TautologyOTW :-)

Cheers,

John



From huzaifa at hostway.com  Tue Apr 26 00:34:04 2005
From: huzaifa at hostway.com (Huzaifa Tapal)
Date: Mon, 25 Apr 2005 23:34:04 -0500
Subject: TypeError: ssl() argument 1 must be _socket.socket,
	not _socketobject
Message-ID: <426DC4BC.30707@hostway.com>

I am getting this error from python 2.3.5 when making secure socket 
connections from my mod_python based application.  It is very odd 
because we cannot replicate this in the development environment, only in 
production on a cluster of 2 debian boxes with Apache2 MPM Worker w/ Mod 
Python 3.13.

Does anybody have any ideas as to what could be causing this error?

Here is the full traceback:

    Traceback:    File 
"/home/orderform/www/cgi-bin/OrderForm_bundle/hwmodules/register/dp_registrar/DPRegistrar.py", 
line 95, in _
_execCmd
        con.endheaders()
       File "/usr/lib/python2.3/httplib.py", line 715, in endheaders
        self._send_output()
       File "/usr/lib/python2.3/httplib.py", line 600, in _send_output
        self.send(msg)
       File "/usr/lib/python2.3/httplib.py", line 567, in send
        self.connect()
       File "/usr/lib/python2.3/httplib.py", line 988, in connect
        ssl = socket.ssl(sock, self.key_file, self.cert_file)
       File "/usr/lib/python2.3/socket.py", line 73, in ssl
        return _realssl(sock, keyfile, certfile)
    TypeError: ssl() argument 1 must be _socket.socket, not _socketobject

The thing is that if we restart the web server, it works fine for about 
20 minutes after which we start getting these errors.

Any help would be appreciated.

Hozi



From gandalf at geochemsource.com  Thu Apr  7 11:40:32 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Thu, 07 Apr 2005 17:40:32 +0200
Subject: import statement - package visibility problem
In-Reply-To: <425553CA.9090403@geochemsource.com>
References: <42550CB9.8060309@geochemsource.com>
	<425539D2.2020001@rubin.hu>	<425550AC.2020006@geochemsource.com>
	<425553CA.9090403@geochemsource.com>
Message-ID: <42555470.6050702@geochemsource.com>


> ' under 'Adapters' then it means that 'DatabaseConnection' is an 
> adapter. But it is not. :-) In the other direction, Adapters are 
> deeper, so adapters should can DatabaseConnection-s (and in fact they 
> are).
>
Spelled:

 In the other direction, Adapter is deeper, so adapters should _be_ 
DatabaseConnection instancess (and in fact they are)

Sorry. :-)


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From wnebfynj at mnovryyb.pbz  Tue Apr 12 09:14:25 2005
From: wnebfynj at mnovryyb.pbz (JZ)
Date: Tue, 12 Apr 2005 15:14:25 +0200
Subject: os.open() i flaga lock
Message-ID: <12ff5c7es4cwa$.1fpe48svo59a1$.dlg@40tude.net>

Szukam jakiego? odpowiednika fcntl na win32. W manualu napisali ?e
os.open() z odpowiedni? flag? jest bardziej uniwersalne od fcntl. Niestety
zero informacji na temat tej flagi oraz brak jakiegokolwiek przyk?adu... :(

--
JZ


From radam2_ at _tampabay.rr.com  Wed Apr 13 14:24:59 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Wed, 13 Apr 2005 18:24:59 GMT
Subject: exporting imports to reduce exe size?
References: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>
	<mailman.1772.1113322484.1799.python-list@python.org>
Message-ID: <dfmq515k8vh16274v96s3e0s1eq9653o8g@4ax.com>

On Tue, 12 Apr 2005 12:14:38 -0400, Chris Cioffi
<evenprimes at gmail.com> wrote:

>My first thought is what if the function you are using uses other
>functions(maybe not exported by the module/package)?  For example:  if
>some_func() makes a call to _some_weird_module_specific_func(), how
>are you going to make sure you get the
>_some_weird_module_specific_func function?  This doesn't even start to
>work when the function you are interested in is also using functions
>from other modules/packages.
>
>Besides, what py2exe is really doing is grabbing the .pyo or .pyc
>files and throwing them in a zip file.  Is it really worth the effort
>to save a 100K or so, at most?
>
>Chris
>

I think in some cases it could save quite a lot more than 100k when
you consider that the module you include to get a single function,
then may include 3 modules for other functions you don't need, and
they in turn do the same.

After looking into it some, I agree it's probably not worth the
effort.  Pythons pickle, shelve, and marshal functions don't work on
most module objects, so it's pretty much a dead end.

It would need be doable in a simple and general way to be worth while.

Thanks anyways,

Ron



From michele.simionato at gmail.com  Fri Apr 29 12:04:17 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 29 Apr 2005 09:04:17 -0700
Subject: doctest's ELLIPSIS
In-Reply-To: <1114789524.038880.312510@g14g2000cwa.googlegroups.com>
References: <1114789524.038880.312510@g14g2000cwa.googlegroups.com>
Message-ID: <1114790657.829547.59680@g14g2000cwa.googlegroups.com>

I think doctest believes the line starting with ... is
a continuation line in a multiline statement.



From lothar at ultimathule.nul  Sun Apr  3 21:37:24 2005
From: lothar at ultimathule.nul (lothar)
Date: Mon, 4 Apr 2005 01:37:24 -0000
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com>
	<20611953.SkRsez8GTE@news.perlig.de>
Message-ID: <11516i9g0usp235@corp.supernews.com>

this response is nothing but a description of the behavior i reported.

as to whether this behaviour was intended, one would have to ask the module
writer about that.
because of the statement in the documentation, which places no qualification
on how the scan for the shortest possible match is to be done, my guess is
that this problem was overlooked.

to produce a non-greedy (minimal length) match it is required that the start
of the non-greedy part of the match repeatedly be moved right with the last
match of the left-hand part of the pattern (preceding the .*?).

why would someone want a non-greedy (minimal length) match that was not
always non-greedy (minimal length)?



"Andr? Malo" <auch-ich-m at g-kein-spam.com> wrote in message
news:20611953.SkRsez8GTE at news.perlig.de...
* lothar wrote:

> re:
> 4.2.1 Regular Expression Syntax
> http://docs.python.org/lib/re-syntax.html
>
>   *?, +?, ??
>   Adding "?" after the qualifier makes it perform the match in non-greedy
>   or
> minimal fashion; as few characters as possible will be matched.
>
> the regular expression module fails to perform non-greedy matches as
> described in the documentation: more than "as few characters as possible"
> are matched.
>
> this is a bug and it needs to be fixed.

The documentation is just incomplete. Non-greedy regexps still start
matching the leftmost. So instead the longest of the leftmost you get the
shortest of the leftmost. One may consider this as a documentation bug,
yes.

nd
--
# Andr? Malo, <http://www.perlig.de/> #





From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 13:34:19 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 18:34:19 +0100
Subject: preallocate list
In-Reply-To: <1113410660.515852.92420@z14g2000cwz.googlegroups.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
	<1113410660.515852.92420@z14g2000cwz.googlegroups.com>
Message-ID: <d3jl5e$p8e$1@scotsman.ed.ac.uk>


> ivec = n*[None]
> 
> so that if I use a list element before intializing it, for example
> 
> ivec[0] += 1
> 
> I get an error message
> 
>   File "xxnone.py", line 2, in ?
>     ivec[0] += 1
> TypeError: unsupported operand type(s) for +=: 'NoneType' and 'int'
> 
> This is in the same spirit as Python's (welcome) termination of a
> program when one tries to use an uninitalized scalar variable.
> 

I feel foolish that I forgot about *. I've just started with Python then 
took 2 weeks off. I'll explore pre-allocation when I'm back up to speed.

Yep, I use None a lot.

Thanks

Jim


From gandalf at geochemsource.com  Fri Apr  8 06:19:14 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Fri, 08 Apr 2005 12:19:14 +0200
Subject: __builtins__ wreidness
In-Reply-To: <d35imf$qcb$1@sea.gmane.org>
References: <42563515.8080401@geochemsource.com> <d35imf$qcb$1@sea.gmane.org>
Message-ID: <42565AA2.6060503@geochemsource.com>


>__builtins__ (plural form) is a CPython implementation detail.
>
>if you want to access the __builtin__ module, import it as usual:
>
>    import __builtin__
>    f = __builtin__.open(...)
>
>if you're interested in CPython implementation details, study the CPython
>source code.
>
></F> 
>  
>
Ok, I agree. I was an idiot. :-) Probably programmers should not use 
__builtins__ at all.
It is still interesting that the same magic identifier is bound to 
different things. :-)


-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From no.spam at see.below.es  Sat Apr  2 02:43:48 2005
From: no.spam at see.below.es (Javier Bezos)
Date: Sat, 2 Apr 2005 09:43:48 +0200
Subject: Grouping code by indentation - feature or ******?
References: <IDwEr6.K2u@bath.ac.uk>	<qH91e.259681$r4.15769879@news-reader.eresmas.com>	<pan.2005.03.27.07.00.34.307937@uiuc.edu>	<ktA1e.260110$r4.15818805@news-reader.eresmas.com>	<1112162883.943233.37980@o13g2000cwo.googlegroups.com><qXB2e.264074$r4.16023840@news-reader.eresmas.com>
	<mailman.1215.1112399720.1799.python-list@python.org>
Message-ID: <fbs3e.266831$r4.16196074@news-reader.eresmas.com>

"Steve Holden" <steve at .com> escribi? en el mensaje
news:mailman.1215.1112399720.1799.python-list at python.org...

  [Discussion on Python slices and the off-by-one issue
   deleted]

> While this may be an interesting philosophical (or should that be
> philological) discussion, since Python has worked this way for donkey's
> years, and since a change would break 30% of the existing codebase, you
> clearly can't be advocating change.
>
> So, what's the point of this thread now?

None. In fact, I sent my last post a couple
of days ago, so I don't see the point of your
message. This thread began when some people
thought that I had to be convinced about how
wonderful slices are, after I said _incidentally_
I didn't like Python slices (and then I had to
explain in turn why I don't like them). Perhaps
you should ask those people, not me.

Javier
_______________________________________________________________
Javier Bezos             | Mem. A multilingual system for LaTeX
jbezos at wanadoo dot es | http://mem-latex.sourceforge.net
.........................|....................................






From dlm at cac.washington.edu  Mon Apr  4 16:34:20 2005
From: dlm at cac.washington.edu (dlm at cac.washington.edu)
Date: Mon, 4 Apr 2005 13:34:20 -0700
Subject: gvbyhqp
Message-ID: <20050405050642.8A9C71E4003@bag.python.org>

The message contains Unicode characters and has been sent as a binary attachment.


From rdm at rcblue.com  Wed Apr 13 21:19:18 2005
From: rdm at rcblue.com (Dick Moores)
Date: Wed, 13 Apr 2005 18:19:18 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
Message-ID: <6.2.1.2.2.20050413181757.06a83c30@rcblue.com>

Dan wrote at 18:02 4/13/2005:
>On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
>wrote:
>
> > I'm just trying to help an artist acquaintance who needs (I just
> >learned) the first 3003 digits of pi to the base 12.
>
>Now you've got me curious.  Why would an artist want the first 3003
>digits of pi to the base 12?

He says,
Do you know how I can get "base12 pi"?
Because the chromatic scale is base12.
c c# d d# e f f# g g# a a# b

Dick




From jaywgraves at gmail.com  Thu Apr 28 11:18:11 2005
From: jaywgraves at gmail.com (jay graves)
Date: 28 Apr 2005 08:18:11 -0700
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
	<1114696780.653849.220080@o13g2000cwo.googlegroups.com>
	<1114698836.708809.32780@o13g2000cwo.googlegroups.com>
Message-ID: <1114701491.042009.270650@l41g2000cwc.googlegroups.com>

Cool.  Let me know if you want a copy of p.py (in all of it's
hard-coded glory).
I can easily put it under Public Domain and you can copy whatever you
want out of it.
...
jay



From robin at reportlab.com  Mon Apr 25 11:01:45 2005
From: robin at reportlab.com (Robin Becker)
Date: Mon, 25 Apr 2005 16:01:45 +0100
Subject: regex over files
Message-ID: <426D0659.7080307@chamonix.reportlab.co.uk>

Is there any way to get regexes to work on non-string/unicode objects. I would 
like to split large files by regex and it seems relatively hard to do so without 
having the whole file in memory. Even with buffers it seems hard to get regexes 
to indicate that they failed because of buffer termination and getting a partial 
match to be resumable seems out of the question.

What interface does re actually need for its src objects?
-- 
Robin Becker



From terti at mighty.co.za  Sat Apr  9 15:02:30 2005
From: terti at mighty.co.za (tertius)
Date: Sat, 09 Apr 2005 21:02:30 +0200
Subject: Recording Video with Python
In-Reply-To: <1112279563.898084.88340@z14g2000cwz.googlegroups.com>
References: <1112279563.898084.88340@z14g2000cwz.googlegroups.com>
Message-ID: <425826C6.5000001@mighty.co.za>

googlemike at hotpop.com wrote:

> Is there a video module so that I can write a Linux Python script to
> record video coming over USB video cams?
> 

http://videocapture.sourceforge.net/

HTH

T


From joachimm at mac.se  Sun Apr 10 08:52:16 2005
From: joachimm at mac.se (=?ISO-8859-1?Q?Joachim_M=E5rtensson?=)
Date: Sun, 10 Apr 2005 14:52:16 +0200
Subject: Problems with dparser grammar
Message-ID: <42592180.9050206@mac.se>

Hello, I am playing around a little bit with dparser, and I thought that 
maybe someone on this list can help me out(There does not seem to be a 
dparser list, atleast not an active one). I am total n00b to parsers so 
this might be very easy. I want a parser that can parse both these lines 
(What I am looking to construct is a parser of a _very_ limited subset 
of objective-c).

[[self _rowsForAddingContentObject:content] retain]
NSArray *contentRowArray

This is what I have so far.

from dparser import Parser

def d_objcmsg(t):
   'objcmsg: "\[" (objcmsg|var) msg "\]" '
def d_varDef(t):
   'varDef: classname "\*" var'
def d_classname(t):
   'classname: "[A-Z][A-Za-z_0-9]*"'
def d_var(t):
   'var: "[a-z_][A-Za-z_0-9]*" '
def d_msg(t):
   'msg: (msgWithArg|"[a-z_][A-Za-z_0-9]*")'
def d_msgWithArg(t):
   'msgWithArg: "[a-z_][A-Za-z_0-9]*" ":" (var|objcmsg)'
Parser().parse("[[self _rowsForAddingContentObject:content] 
retain]",print_debug_info=1)
Parser().parse("NSArray *contentRowArray",print_debug_info=1)

this makes the "[[self _rowsForAddingContentObject:content] retain]" 
line pass, however I get a syntax error on the other one. Switching the 
placing of d_obcmsg and d_varDef makes the other line pass, but then the 
first fail with a syntax error. I want both of the lines to pass. Anyone 
have any ideas?

Thanks in advance.
Joachim



From adijkstra_at_baandersconsultancy.nl at olive.qinip.net  Tue Apr 19 03:21:14 2005
From: adijkstra_at_baandersconsultancy.nl at olive.qinip.net (Arjen DijkstraDuikboot)
Date: Tue, 19 Apr 2005 09:21:14 +0200
Subject: module MySQLdb is missing in python 2.3.3
In-Reply-To: <mailman.2081.1113890686.1799.python-list@python.org>
References: <mailman.2081.1113890686.1799.python-list@python.org>
Message-ID: <20050419071944.0116F1849E@olive.qinip.net>

http://sourceforge.net/projects/mysql-python

Arjen

praba kar wrote:
> Dear All,
> 
>    I am using python 2.3.3 version.  If I try to
> import MySQLdb.  Here I found " the following
> error"
> importError: No module named MySQLdb.
> 
> So what I need to do for this ?.  How I need to
> install this MySQLdbo.
> 
> praba 
> 
> ________________________________________________________________________
> Yahoo! India Matrimony: Find your life partner online
> Go to: http://yahoo.shaadi.com/india-matrimony



From mauriceling at acm.org  Thu Apr 14 21:49:12 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 15 Apr 2005 11:49:12 +1000
Subject: new to mac OS10
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
	<d3n0uo$ohl$1@domitilla.aioe.org>
	<d3n25g$rih$1@geraldo.cc.utexas.edu>
Message-ID: <d3n6io$vku$1@domitilla.aioe.org>


> 
> I was actually trying to update to the newest python version, and I had 
> read something saying it would conflict with the old version, so I went 
> through and deleted all the folders that had "python" in the name =]. 
> clever of me, huh?  now I can't make either the new or the old work. 
> Once again, any help would be terrific.
> 
> THN

Ok... I am going to assume a few things and will need you to check a few 
things... please tell me if my assumptions are wrong...

assumption 1: you are afraid of "python overload' in Mac because you 
want the latest version of Python but Apple doesn't seems to maintain 
the upgrade of the Apple-installed Python.

assumption 2: you are installing the latest version of Python through Fink.

I need you to check the following things and tell me the results:

1. go to /usr/bin and do a "ls -all python*"

2. check for presence of /System/Library/Framework/Python.framework

3. do a "which python"

4. do a "which pythonw"

5. execute "python"

6. execute "pythonw"

i need to assess the damage done :P

Cheers
Maurice



From bokr at oz.net  Wed Apr 20 00:21:06 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 04:21:06 GMT
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
Message-ID: <4265d7b4.27743873@news.oz.net>

On 19 Apr 2005 20:49:56 -0700, Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

>Dumb question from a Windows ignoramus:
>
>I find myself needing to write a Python app (call it myapp.py) that
>uses tkinter, which as it happens has to be used under (ugh) Windows.
>That's Windows XP if it makes any difference.
>
>I put a shortcut to myapp.py on the desktop and it shows up as a
>little green snake icon, which is really cool and Pythonic.  When I
>double click the icon, the app launches just fine and the tkinter
>interface does its thing.  But Windows also launches a DOS box that
>just sits on the screen uselessly.  It's potentially useful in that
>"print" statements in the Python app can show messages on the DOS box,
>but I figure this is a graphical app so I don't plan to show messages
>that way.  Also, it happens I often want to run lots of instances of
>the app simultaneously, and I want to launch them all by double
>clicking the icon.  That means the whole screen is cluttered with DOS
>boxes all over the place.  Of course I can minimize them by clicking
>the little underscore in the corner of each one, but that really takes
>away from the coolness of it all.
>
>Question: is there any simple way to arrange to launch the app from
>the desktop, without also launching a DOS box?  By simple I mean
>without having to mess with some complex packaging/installation system
>(McMillan installer?) every time I want to modify the app, which
>during development means a few hundred times a day.  I have no desire
>at all to conceal the source code from the user or anything like that
>either.
>
>Thanks.
I would try right-clicking the shortcut icon and selecting properties,
then select the shortcut tab and edit the target string with s/python/pythonw/
and then click ok.

Then try double clicking the shortcut icon again.
If that does it, you're home ;-)
If not, post more symptoms.
HTH

Regards,
Bengt Richter


From cdkrug at worldnet.att.net  Tue Apr 26 00:58:43 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Tue, 26 Apr 2005 04:58:43 GMT
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
	<mailman.2498.1114482620.1799.python-list@python.org>
Message-ID: <7Ujbe.647694$w62.444038@bgtnsc05-news.ops.worldnet.att.net>

On Mon, 25 Apr 2005 21:30:18 -0500, Jaime Wyant
<programmer.py at gmail.com> wrote:
> Well, if you're a c++ programmer, 

Well, my forte is embedded systems and device controls . . .

> then you've probably ran into
> `functors' at one time or another.  You can emulate it by making a
> python object that is `callable'.
> 
> class functor:
> 	def __init__(self):
> 		self.ordered_sequence = [1, 2, 3, 4, 5]
> 	def __call__(self, arg1, arg2):
> 		self.ordered_sequence.extend((arg1,arg2))
> 		self.ordered_sequence.sort()
> 		

"ordered" in this case doesn't mean "sorted." . . .
8-)

It's the set of filter coefficients and cumulative remainders for an
overlap add convolution.  Sorting would be . . . bad.  Like crossing the
streams bad.

Both of these techniques look promising here.


Thanks




From max.derkachev at gmail.com  Thu Apr  7 06:41:11 2005
From: max.derkachev at gmail.com (max.derkachev at gmail.com)
Date: 7 Apr 2005 03:41:11 -0700
Subject: logging as root using python script
In-Reply-To: <mailman.1476.1112867333.1799.python-list@python.org>
References: <1112847155.108154.180290@g14g2000cwa.googlegroups.com>
	<20050407105048.00004cd2@LAB2-13.esi>
	<mailman.1476.1112867333.1799.python-list@python.org>
Message-ID: <1112870471.019651.184560@o13g2000cwo.googlegroups.com>

Unixish system won't let You execute a setuid script with the setuid
privileges. Only real machine code can be executed so.
But of course, there are workarounds. When, say, you have a perl script
with setuid bit set, and sperl (setuid root perl) is installed, the
perl interpreter choses  sperl to interpret your script (sperl makes it
impossible to execute a symlink attak, which is the reason why UNIX
does not leverage privileges for setuid scripts).
So, You may write a perl suid wrapper for your python script, and let
sperl execute it.



From mwm at mired.org  Sat Apr  2 18:33:12 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 02 Apr 2005 17:33:12 -0600
Subject: string goes away
References: <424CCED4.60000@imb-jena.de>
	<16972.46839.309827.574430@montanaro.dyndns.org>
	<424CD55D.8000506@imb-jena.de>
	<16972.49639.890702.835036@montanaro.dyndns.org>
	<mailman.1191.1112375356.1799.python-list@python.org>
Message-ID: <86vf74wy87.fsf@guru.mired.org>

Andreas Beyer <beyer at imb-jena.de> writes:

> OK, you won. I read in an (regretably old) guidline for improving
> Python's performance that you should prefer map() compared to list
> comprehensions. Apparently the performance of list comprehensions has
> improved a lot, which is great. (Or the overhead of calling map() got
> too big, but I hope this is not the case.)  So, what is the purpose of
> map()? Should it too be deprecated?

map() is already slated for removal in Python 3.0.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From steven.bethard at gmail.com  Wed Apr 13 18:34:30 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 16:34:30 -0600
Subject: sort of a beginner question about globals
In-Reply-To: <1113422470.180010.172970@z14g2000cwz.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
Message-ID: <YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>

fred.dixon wrote:
> ok I'm sorry, I'm not sure what your doing there.
> if i have to guess it looks like yo might me modifying the imported
> modules dict with another dict.

Yes, this takes all the atrributes of the options object and sets them 
as attributes of the module.  If you're afraid of __dict__, you could 
also write this as:

for name, value in vars(opts).iteritems():
     setitem(options, name, value)

> isn't there a way i can just assign to a var and have it seen no matter
> what part of the code is currently executing ?

No, unless you mean only within a single module.  Python has no globals 
in the sense of being global to all modules.  If globals in a single 
module is sufficient, you can modify the globals of the current module 
using globals(), e.g.:

     globals()[name] = value

or in my example:

     globals().update(vars(opts))

You can also do this by importing the module itself, e.g.:

     mod = __import__(__name__)
     setattr(mod, name, value)

> it seems that i can import __main__ where i set the global and then
> access the var from my local func.
>
> is ther any gotcha's involveld in this ?

Probably. ;)  But since I don't know what code you've actually produced 
here, I'm not sure.  What did you write to "import __main__ ... [and] 
set the gloabl and then access the var"?

STeVe


From usenet at gungfu.de  Sun Apr 24 07:25:59 2005
From: usenet at gungfu.de (=?iso-8859-1?q?Steffen_Gl=FCckselig?=)
Date: 24 Apr 2005 04:25:59 -0700
Subject: Question on metaclasses
Message-ID: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>

Hello,

I've been experimenting with metaclasses a bit (even though I am quite
a newbie to python) and stumpled over the following problem in my code:

class Meta(type):
  def __init__(cls, name, bases, dct):
    for attr, value in dct.items():
      if callable(value):
        dct[attr] = wrapper(value)

wrapper adds debugging-information to methods of the class (at least
that is my plan).

Using dct[attr] = wrapper(value) does not result in wrapped methods,
though. Using setattr(cls, attr, wrapper(value)) creates the desired
effect, though.

Why are the changes to dct not visible in the instantiated class? Is
dct not the namespace of the class currently instantiated?


best regards
Steffen



From dcrespo at gmail.com  Mon Apr 11 16:19:16 2005
From: dcrespo at gmail.com (dcrespo)
Date: 11 Apr 2005 13:19:16 -0700
Subject: NSInstaller Vs. Inno Setup
Message-ID: <1113250756.207904.29670@f14g2000cwb.googlegroups.com>

Any comments?



From stevenaleach at mac.com  Mon Apr 18 11:43:15 2005
From: stevenaleach at mac.com (steve.leach)
Date: Mon, 18 Apr 2005 11:43:15 -0400
Subject: How standard is the standard library?
Message-ID: <d40kif$qs0$1@domitilla.aioe.org>

Newbie question: Looking through my stack of books and various on-line 
references, I have seen several libraries and library functions listed 
as depreciated.

Is there a road map or concrete list of what parts of the standard 
library are to be considered reliable and permanent?  Coming from C, I 
am used to library functions being set in stone.

Can I reasonably expect that code using, for instance xml.dom.minidom 
will still work in 10 years?

Do all depreciated libraries print warnings when they are imported?  I 
see that if I print xmllib, I get the message "The xmllib module is 
obsolete.  Use xml.sax instead."  Is this behavior followed 
consistently, to give a "this code might not work come this time next 
year" warning?


From jfj at freemail.gr  Mon Apr 25 05:32:15 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 25 Apr 2005 12:32:15 +0300
Subject: How to "generalize" a function?
In-Reply-To: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
References: <851x8zyhtl.fsf@ishmael.pequod.dyndns.org>
Message-ID: <426CB91F.5030306@freemail.gr>

Thomas K?llmann wrote:

> Hi, everybody!
> 
> I'm teaching myself Python, and I have no experience in programming
> apart from some years of shell scripting. So, please bear with me.
> 
> These two funktions are part of an administrative script I've set
> myself as a first lesson, and, as you will see, they're practically the same,
> except for one variable. So I'd like to weld them together -- but I
> can't find out how to.

Pass the variable as an argument probably.
But because generally you wouldn't want to recompile the regexp (this 
should be done once), you could say:

# untested
def makewriter (regexp_string):
   def writeFunc(ip, regex=re.compile(regexp_string)):
      confFile = open(networkConf, 'r')
      conf = confFile.readlines()
      confFile.close
      for line in conf:
  	if regex.search(line):
  	    addressLine = line
      addressLineNum = conf.index(addressLine)
      address = string.split(addressLine, ' ')
      address[1] = ip + "\n"
      conf[addressLineNum] = string.join(address)
      confFile = open(networkConf, 'w')
      confFile.writelines(conf)
      confFile.close
   return writeFunc

writeIP=makewriter('(.*)address(.*)')
writeMask=makewriter('(.*)netmask(.*)')

This is rather advanced python programming though, but it shows
cool dynamic function creation features and it's never early to
get into it;)

jfj



From pgmoscatt at optushome.com.au  Wed Apr 13 04:25:55 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Wed, 13 Apr 2005 18:25:55 +1000
Subject: A command in a String ?
Message-ID: <pan.2005.04.13.08.25.53.59804@optushome.com.au>

I have a rather odd question:

Is there a way Python can execute a command within a string ?

For example if I had something like:
_str = "fm=OptionMenu(root,xx,'string1','string2','string3')"

And the execute _str.

The reason why I am trying to do this that as I am aware the OptionMenu
hasn't the ability insert options therefore the options would be inserted
by manipulating strings.

Pete



From lbates at syscononline.com  Fri Apr  1 10:44:34 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 01 Apr 2005 09:44:34 -0600
Subject: Unzipping Files
In-Reply-To: <mailman.1185.1112366667.1799.python-list@python.org>
References: <mailman.1185.1112366667.1799.python-list@python.org>
Message-ID: <j-WdnQQ8nbau8dDfRVn-sw@comcast.com>

Use something like:

import zipfile
zfile=zipfile.ZipFile(zipfilename,'r')
contents=zfile.read(filenametoread)

Stripped out of a working program, but not tested.

-Larry Bates


Greg Lindstrom wrote:
> Hello-
> I am trying to read a file from a zip archive.  I have read the
> documentation on zipfile and can read the names of the files in the
> archive and the length of each file, but do not see how to get to the
> actual data from any given file.  This is probably so simple that it
> hurts, so take it easy on me if you please...I just don't see it and
> have a deadline rushing towards me.  How do I read the data from a file
> in a zip archive?
> 
> Thanks!
> --greg
> 


From kay.schluehr at gmx.net  Sat Apr 16 11:07:16 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Apr 2005 08:07:16 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
Message-ID: <1113664036.853062.89260@z14g2000cwz.googlegroups.com>

Brian Sabbey wrote:

> def get_items(thunk):    # <-- "thunk-accepting function"
>      f = acquire()
>      try:
>          for i in f:
>              thunk(i)      # A-OK
>      finally:
>          f.release()
>
> do i in get_items():
>     print i

Seems like You want to solve the addressed generator problem by
manipulating the syntax: "make generators look more function like",
because father compiler won't complain ;-) Sorry, but IMO this is
hackery and has nothing to do with good language design and I consider
this as extremely harmfull. Instead of making things explicit it does
it the other way round and tries to make Python code more obscure.
Moreover I can't notice the superiority of thunks in Your other
examples over more common techniques like decorators for pre- and
postconditions and the GOF command pattern. I thinks the place for such
ideas are Michael Hudsons famous bytecodehacks.

-1 for from me for thunks in Python.

Ciao,
Kay



From mauriceling at acm.org  Thu Apr 14 20:13:18 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 15 Apr 2005 10:13:18 +1000
Subject: new to mac OS10
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>
Message-ID: <d3n0uo$ohl$1@domitilla.aioe.org>

Thomas Nelson wrote:
> I'm on a mac OS X (10.3.8), and I seem to have accidentally destroyed 
> the default python installation.  How should I put it on?  Do I need to 
> use the unix version?  any help would be greatly appreciated.
> 
> THN

Hi Thomas,

I'm using OSX 10.3.8 as well. Just wondering, how did you "destroy" it? 
What I am thinking is, it may not be as destroyed as you think it might 
have...

cheers
maurice


From ville at spammers.com  Sun Apr 24 17:44:57 2005
From: ville at spammers.com (Ville Vainio)
Date: 25 Apr 2005 00:44:57 +0300
Subject: Object oriented storage with validation (was: Re: Caching
	compiled regexps across sessions (was Re: Regular Expressions
	- Python vs Perl))
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
	<mailman.2289.1114190176.1799.python-list@python.org>
	<m3k6muaxmi.fsf@iny.iki.fi> <du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi>
	<m3ekd0vd6i.fsf_-_@iny.iki.fi>
Message-ID: <du74qdv3l46.fsf@mozart.cc.tut.fi>

>>>>> "Ilpo" == Ilpo Nyyss?nen <iny> writes:

    Ilpo> Pickle doesn't have validation. I am not comfortable for
    Ilpo> using it as storage format that should be reliable over
    Ilpo> years when the program evolves. It also doesn't tell me if

That's why you should implement xml import/export mechanism and use
the xml file as the "canonical" data, while the pickle is only a cache
for the data.

    Ilpo> How can it work automatically in separate module? Replacing
    Ilpo> the re.compile with something sounds possible way of getting
    Ilpo> the regexps, but how and where to store the compiled data?
    Ilpo> Is there a way to put it to the byte code file?

Do what you already did - dump the regexp cache to a separate file. 

-- 
Ville Vainio   http://tinyurl.com/2prnb


From jerf at jerf.org  Fri Apr  1 12:20:56 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 12:20:56 -0500
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<WRe3e.1286$7b.403@trndny05>
Message-ID: <pan.2005.04.01.17.20.56.143109@jerf.org>

On Fri, 01 Apr 2005 16:42:30 +0000, Raymond Hettinger wrote:
> FWIW, the evolution of py.test is to also work seemlessly with existing tests
> from the unittest module.

Is this true now, or is this planned? 

I read(/skimmed) the docs for py.test when you linked to the project, but
I don't recall seeing that. Certainly some of the features made me drool
but I have an investment in unittest. If I can relatively easily port them
over, I'd love to use py.test. (I don't care about a small per-file
change, it'd probably be one I can automate anyhow. But I can't afford to
re-write every test.) I didn't see anything like this in the docs, but I
may have missed it.

That'd be cool.


From zolkos+newsgroups at gmail.com  Mon Apr 25 06:17:03 2005
From: zolkos+newsgroups at gmail.com (Robert)
Date: Mon, 25 Apr 2005 10:17:03 +0000
Subject: pygtk and long running process
Message-ID: <pan.2005.04.25.10.17.03.869604@gmail.com>

Hi,

I have a command line app that can take up to 20 minutes to complete and
every minute or so updates it's status (spits it out to console).  I am
writing a front end for this app in python/gtk and was wondering what
command I use to a) invoke the command and b) how to capture it's out put
and for instance update a text box.

Regards,

Rob


From philippe at philippecmartin.com  Wed Apr 20 13:17:26 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Wed, 20 Apr 2005 17:17:26 GMT
Subject: Python Debugger with source code tracking ability
References: <ed89f8f2.0504191845.aaeebf5@posting.google.com>
Message-ID: <G8w9e.894$l45.778@newssvr12.news.prodigy.com>

Idle (does have source tracking)
Eclipse + pydev
Eric3 (Linux only)

The problem I have with any of them (as well as my own debugger) is their
speed: I believe they all use bdb that is currently fairly slow stepping
over extensive amount of code

Regards,

Philippe





Tran Tuan Anh wrote:

> Hi all,
> 
> I am new to Python and desperated to look for a good Python debugger.
> I mean a debugger with source coding tracking. For C/C++, emacs and
> gud offers execellent development env. The source code tracking is
> extremely useful for recursive functions.
> 
> I have spent time Googling but not found anything near.
> 
> Thanks!
> Tuan-Anh



From fredrik at pythonware.com  Sat Apr  9 04:04:32 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 9 Apr 2005 10:04:32 +0200
Subject: EOL created by .write or .encode
References: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>
Message-ID: <d3824k$p27$1@sea.gmane.org>

"Xah Lee" <xah at xahlee.org> wrote:

> Why is that some of my files written out by
>    outF.write(outtext.encode('utf-8'))
> has ascii 10 as EOL, while others has ascii 13 as EOL?

>    outF = open(tempName,'wb')
>    outF.write(outtext.encode('utf-8'))
>    outF.close()

UTF-8 is not a binary format.  get rid of the "b" flags, and things
will work as expected.

</F> 





From nospam at denbridgedigital.com  Sun Apr 17 15:47:20 2005
From: nospam at denbridgedigital.com (Jonathan Brady)
Date: Sun, 17 Apr 2005 20:47:20 +0100
Subject: Problem with unpack hex to decimal
References: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>
Message-ID: <d3ueer$avn$1$8302bc10@news.demon.co.uk>


<serpent17 at gmail.com> wrote in message 
news:1113763068.002612.240940 at l41g2000cwc.googlegroups.com...
> Hello,
>
> I was looking at this:
> http://docs.python.org/lib/module-struct.html
> and tried the following
>
>>>> import struct
>>>> struct.calcsize('h')
> 2
>>>> struct.calcsize('b')
> 1
>>>> struct.calcsize('bh')
> 4
>
> I would have expected
>
>>>> struct.calcsize('bh')
> 3
>
> what am I missing ?

Not sure, however I also find the following confusing:
>>> struct.calcsize('hb')
3
>>> struct.calcsize('hb') == struct.calcsize('bh')
False

I could understand aligning to multiples of 4, but why is 'hb' different 
from 'bh'? 




From steven.bethard at gmail.com  Thu Apr 14 17:18:20 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 14 Apr 2005 15:18:20 -0600
Subject: New-style classes, iter and PySequence_Check
In-Reply-To: <d3m795$cuq$1@epityr.hut.fi>
References: <d3m795$cuq$1@epityr.hut.fi>
Message-ID: <_u-dnQ8UApqBQ8PfRVn-hw@comcast.com>

Tuure Laurinolli wrote:
> Someone pasted the original version of the following code snippet on 
> #python today. I started investigating why the new-style class didn't 
> work as expected, and found that at least some instances of new-style 
> classes apparently don't return true for PyInstance_Check, which causes 
> a problem in PySequence_Check, since it will only do an attribute lookup 
>  for instances.
> 
> Things probably shouldn't be this way. Should I go to python-dev with this?
> 
> Demonstration snippet:

For anyone who's curious, here's what the code actually does:

py> args={'a':0}
py> class Args(object):
...     def __getattr__(self,attr):
...         print "__getattr__:", attr
...         return getattr(args,attr)
...
py> class ClassicArgs:
...     def __getattr__(self, attr):
...         print "__getattr__:", attr
...         return getattr(args, attr)
...
py> c = ClassicArgs()
py> i = c.__iter__()
__getattr__: __iter__
py> print i
<dictionary-keyiterator object at 0x0115D920>
py> i = iter(c)
__getattr__: __iter__
py> print i
<dictionary-keyiterator object at 0x01163CA0>
py> a = Args()
py> i = a.__iter__()
__getattr__: __iter__
py> print i
<dictionary-keyiterator object at 0x01163D20>
py> i = iter(a)
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "D:\Steve\My Programming\pythonmodules\sitecustomize.py", line 
37, in iter
     return orig(*args)
TypeError: iteration over non-sequence

STeVe


From python-url at phaseit.net  Mon Apr 11 16:08:02 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 11 Apr 2005 20:08:02 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
Message-ID: <d3ekhf$a0f$1@lairds.us>

QOTW: "I think my code is clearer, but I wouldn't go so far as to say I'm
violently opposed to your code.  I save violent opposition for really
important matters like which text editor you use." - Roy Smith

"You need to recursively subdivide the cake until you have a piece small
enough to fit in your input buffer. Then the atomicity of the cake-ingestion
operation will become apparent." - Scott David Daniels


    Various Python Meetup groups are meeting this week:
        http://python.meetup.com/
        
    wxPython 2.5.5.1 is out...
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/7ca6358d54c9c617/84330473f542e5a6
    ... for those that don't hate it.
        http://fraca7.free.fr/blog/index.php?2005/04/04/10-a-word-about-guis
        
    A couple of nice cookbook recipes - check your docstring coverage, and let Python tell you what you meant to type.
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/355731
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/409000
        
    Exceptions are't just for errors in Python.
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/925f0b16cf56c2ab/793e0ab436c91d48

    The martellibot's working for Google!
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/c9d075e5f6b1f934/d6256652f5ffcc50
        
    Backup your del.icio.usly linked pages to Gmail.
        http://llimllib.f2o.org/blog/serve/entry/delbackup
        
    How to tell whether a wave function corresponds to bosons or fermions.
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/e9cce91f429bc540/d78c7eec409154a4
    No, I'm none the wiser, either. Still, some interesting algorithms in there.
    
    Rolling your own __deepcopy__.
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/41269228e1827a87/444ac776c4ffe00f
        
    IronPython is getting good coverage these days.
        http://informationweek.com/story/showArticle.jhtml?articleID=160403713


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From sunnan at handgranat.org  Fri Apr  1 06:38:31 2005
From: sunnan at handgranat.org (Sunnan)
Date: Fri, 01 Apr 2005 11:38:31 GMT
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
Message-ID: <Xoa3e.133816$dP1.471319@newsc.telia.net>

Daniel Silva wrote:
> We think dropping FILTER and MAP is pretty uncontroversial; (filter P
> S) is almost always written clearer as a DO loop (plus the LAMBDA is
> slower than the loop).  Even more so for (map F S).  In all cases,
> writing the equivalent imperative program is clearly beneficial.

How about using srfi-42 instead of those nasty do loops?
It's pretty clean:
(list-ec (: a lis) (* a a))
is equivalent to
(map (lambda (a) (* a a)) lis)

Before I discovered srfi-42, my code often had hideous things like:

(append-map
  (lambda (item)
    (map
     (lambda
	(inner)
       (* inner inner))
    (cdr item)))
  lis)

to return (1 4 9 16 25 36 49 64 81) for
a lis that's '((a 1 2 3) (b 4 5 6) (c 7 8 9))).

This becomes even neater:
(list-ec
  (: item lis)
  (: inner (cdr item))
  (* inner inner))

Have a happy first of april!


From miki.tebeka at zoran.com  Wed Apr  6 01:36:39 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Wed, 6 Apr 2005 08:36:39 +0300
Subject: Best editor?
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <20050406053639.GB876@zoran.com>

Hello ChinStrap,

> When not using the interactive prompt, what are you using? I keep
> hearing everyone say Emacs, but I can't understand it at all. I keep
> trying to learn and understand why so many seem to like it because I
> can't understand customization even without going through a hundred
> menus that might contain the thing I am looking for (or I could go
> learn another language just to customize!).
Emacs (or VIm in my case) takes time to learn. However when you start to
understand it and know you way around it'll do things no other editor will
do for you.

> Personally I like SciTE, it has everything I think a midweight editor
> should: code folding, proper python support, nice colors out of the
> box, hotkey access to compile (I'm sure emacs does this, but I couldn't
> figure out for the life of me how), etc.
If you're happy with SciTE stay with it.
 
> Opinions on what the best is? Or reading I could get to maybe sway me
> to Emacs (which has the major advantage of being on everyone's system).
Everyone has his/her/it own favorite editor. It's very individual, I'm
hooked on VIm while others won't touch it.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From benmarkwell at gmail.com  Fri Apr  1 22:52:13 2005
From: benmarkwell at gmail.com (Ben)
Date: 1 Apr 2005 19:52:13 -0800
Subject: New to programming question
In-Reply-To: <mailman.1166.1112329249.1799.python-list@python.org>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<mailman.1166.1112329249.1799.python-list@python.org>
Message-ID: <1112413933.314384.219520@f14g2000cwb.googlegroups.com>

Thanks for your input.



From modelnine at ceosg.de  Sat Apr  2 17:57:52 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sun, 3 Apr 2005 00:57:52 +0200
Subject: Simple thread-safe counter?
In-Reply-To: <7xmzsg3ov6.fsf@ruckus.brouhaha.com>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<d2mmi8$g9t$1@panix2.panix.com>
	<7xmzsg3ov6.fsf@ruckus.brouhaha.com>
Message-ID: <200504030057.56239.modelnine@ceosg.de>

Am Samstag, 2. April 2005 22:28 schrieb Paul Rubin:
> I'm starting to believe the GIL covers up an awful lot of sloppiness
> in Python.  I wonder if there could be a decorator approach:
>
>     @synchronized
>     def counter():
>        t = itertools.count()
>        while True:
>          yield t.next()

Of course there could:

def synchronized_iterator(f):
    def wrapper(*args,**kwargs):
        class iterator(object):
            def __init__(self,f,args,kwargs):
                self.iter = f(*args,**kwargs)
                self.lock = threading.RLock()
            def __iter__(self):
                return self
            def next(self):
                self.lock.acquire()
                try:
                    return self.iter.next()
                finally:
                    self.lock.release()
        return iterator(f,args,kwargs)
    return wrapper

@synchronized_iterator
def create_counter():
    t = itertools.count()
    while True:
        yield t.next()

or

counter = synchronized_iterator(itertools.count)

I used a class-based approach, as I don't want to destroy the semantics of 
calling the returned wrapper(), which should've already instantiated the 
wrapped generator object (which doesn't happen when making wrapper() a 
generator itself).

-- 
--- Heiko.
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From lothar at ultimathule.nul  Sun Apr  3 11:47:05 2005
From: lothar at ultimathule.nul (lothar)
Date: Sun, 3 Apr 2005 15:47:05 -0000
Subject: re module non-greedy matches broken
Message-ID: <115040egk00tf9d@corp.supernews.com>

re:
4.2.1 Regular Expression Syntax
http://docs.python.org/lib/re-syntax.html

  *?, +?, ??
  Adding "?" after the qualifier makes it perform the match in non-greedy or
minimal fashion; as few characters as possible will be matched.

the regular expression module fails to perform non-greedy matches as
described in the documentation: more than "as few characters as possible"
are matched.

this is a bug and it needs to be fixed.

examples follow.

lothar at erda /ntd/vl
$ cat vwre.py
#! /usr/bin/env python

import re

vwre = re.compile("V.*?W")
vwlre = re.compile("V.*?WL")

if __name__ == "__main__":

  newdoc = "V1WVVV2WWW"
  vwli = re.findall(vwre, newdoc)
  print "vwli[], expect", ['V1W', 'V2W']
  print "vwli[], return", vwli

  newdoc = "V1WLV2WV3WV4WLV5WV6WL"
  vwlli = re.findall(vwlre, newdoc)
  print "vwlli[], expect", ['V1WL', 'V4WL', 'V6WL']
  print "vwlli[], return", vwlli

lothar at erda /ntd/vl
$ python vwre.py
vwli[], expect ['V1W', 'V2W']
vwli[], return ['V1W', 'VVV2W']
vwlli[], expect ['V1WL', 'V4WL', 'V6WL']
vwlli[], return ['V1WL', 'V2WV3WV4WL', 'V5WV6WL']

lothar at erda /ntd/vl
$ python -V
Python 2.3.3




From martin at v.loewis.de  Mon Apr 18 16:32:22 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 18 Apr 2005 22:32:22 +0200
Subject: EasyDialogs module problem with python 2.4.1
In-Reply-To: <%fS8e.1066640$6l.831254@pd7tw2no>
References: <C4S8e.1063265$Xk.1017278@pd7tw3no>
	<%fS8e.1066640$6l.831254@pd7tw2no>
Message-ID: <42641956$0$21477$9b622d9e@news.freenet.de>

scott wrote:
> MacOS.Error: (-1713, 'no user interaction is allowed')

Try pythonw.

Martin


From steven.bethard at gmail.com  Wed Apr 13 11:05:35 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 09:05:35 -0600
Subject: sort of a beginner question about globals
In-Reply-To: <1113403451.556360.116630@f14g2000cwb.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
Message-ID: <GpSdndekpZygqMDfRVn-hw@comcast.com>

fred.dixon wrote:
> I want to use OPTIONS as a global var.
> In this particular case I am trying to set a global debug constant so I
> can have some debug logging happen when my program is run with a
> -debug option.
> what will actuall end up in OPTIONS is OPTIONS.debug = True as i am
> using optparse module.

Why not just make options a module?

Then you can do something like:

----- options.py -----
debug = False
----------------------

----- file1.py -----
import file2
import options

options.debug = True
a = file2.class1()
a.func1()
--------------------

----- file2.py -----
import options
class class1(object):
     def func1(self):
         if options.debug:
             print 'Debugging'
         pass
--------------------

Note that if you're trying to output debugging messges, you should 
really look into the logging module instead.

STeVe


From merkosh at hadiko.de  Tue Apr 12 06:31:30 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 12:31:30 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
	<hPCdnbuFntzcHcbfRVn-hA@comcast.com>
Message-ID: <d3g822$j0a$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 10:01 am Steven Bethard wrote:
>> I am using a class to manage configuration settings in an application.
>> This object should only existe once so that when the user
>> changes a setting through a configuration dialog the change imminent in
>> all locations where access to config settings are needed.
 
> Ahh, I see.  I would typically just use a module in this situation,
> where the configuration settings were just names global to the module.
> Is there a benefit to using a singleton object over using just a module?

Basically I am using a module. The config file is stored in
$HOME/.<app>/<app>.conf where the user can go and edit it. It is a working
python program which globally declares variables.
I cannot simply import this module as it does not lie in the path and I am
not too fond of dynamically cluttering sys.path to my needs. My intend was
to make it look as little complicated as possible (for the user) while
retaining maximum flexibility.

Therefore I wrote a class, subclassing a dict, which executes the config
file and takes up the variables into its namespace. Afterwards I update the
dict with default-values (in case the user kicked some vars out) or
manipulate the read-in config variables, in case the format changed. 

When the application closes the Singleton is written back to the config file
in the user home by using the PrettyPrinter and substituting variables in a
rather longer descriptive text. That way the user always has a nicely
formatted, descriptive configuration file - I thought that was rather
straight forward. :/

Ciao
Uwe     


From could.net at gmail.com  Fri Apr  1 01:48:10 2005
From: could.net at gmail.com (could ildg)
Date: Fri, 1 Apr 2005 14:48:10 +0800
Subject: what's the use of __repr__?when shall I use it?
Message-ID: <311b5ce1050331224867b1890@mail.gmail.com>

What's the difference between __repr__  and   __str__? 
When will __repr__ be useful?


From mrovner at propel.com  Sat Apr 30 00:30:41 2005
From: mrovner at propel.com (Mike Rovner)
Date: Fri, 29 Apr 2005 21:30:41 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <3dg5isF6qe1nhU1@news.dfncis.de>
References: <d4u60o$akh$1@news2.netvision.net.il>	<mailman.47.1114818531.14961.python-list@python.org>
	<3dg5isF6qe1nhU1@news.dfncis.de>
Message-ID: <d4v1an$j7q$1@sea.gmane.org>

David Murmann wrote:
> Shane Hathaway wrote:
> 
>> That was pretty fun.  Good for a Friday.  Too bad it comes to an abrupt
>> "temporary end".
>>
>> Shane
>>
>> P.S. I hope I didn't hammer your server on step 3.  I was missing the
>> mark. :-)
> 
> 
> Interestingly step 3 is actually wrong... there is an additional 
> solution, which looks like cqqmsxk. (I don't think that spoils the fun :))

3 IS wrong because if you use any not BIG letter after bodyguard on both 
sides, you get extra 'eCQQmSXK\n' which slow me down for 5 minutes.

Mike




From gsmith at oxfam.org.uk  Fri Apr 15 08:55:54 2005
From: gsmith at oxfam.org.uk (Graham)
Date: Fri, 15 Apr 2005 13:55:54 +0100
Subject: MS SQL Server/ODBC package for Python
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
Message-ID: <425fb9da$0$290$ed9e5944@reading.news.pipex.net>

Thanks Simon
I have just installed mxODBC and tried one of their samples.
Am getting an error on trying to import mx.ODBC

    ImportError: No module named mx.ODBC

After the install the mx folder has been place in my C:\Program Files\Plone
2\Python\lib\site-packages folder however when I browse the PythonPath and
look under Standard Python Library I can't see mx.

Any ideas what I mnay have done wrong?

many thanks
Graham


"Simon Brunning" <simon.brunning at gmail.com> wrote in message
news:mailman.1957.1113568143.1799.python-list at python.org...
On 4/15/05, Graham <gsmith at oxfam.org.uk> wrote:
> I need a SQL Server or ODBC package for Python.  Can anyone help please?
> Have search the Python packages under Database and there is no reference
to
> either SQL Server or ODBC.

Top of the line is probably mxODBC
(<http://www.egenix.com/files/python/mxODBC.html>). It's the Rolls
Royce of DB-API modules. It's not free for commercial use, but it's
worth every penny/cent/groat/whatever.

For commercial work where I've not been able to justify spending money
(in my bosses opinion at least), adodbapi
(<http://adodbapi.sourceforge.net/>) works a treat.

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/




From leszczynscy at nospamyahoo.com  Thu Apr 28 08:11:59 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Thu, 28 Apr 2005 07:11:59 -0500
Subject: Getting a list of classes in the current module/auto introspection
Message-ID: <ytSdnWXt8PvGT-3fRVn-pw@comcast.com>

Hi,
I have a following problem. Let's say there is a module which could be 
imported or run as __main__. It is going to contain hundreds of classes, 
something like that:

import moduleA
from moduleB import *

class A:
	pass

class B:
	pass

class C:
	pass

[...]


I would like to be able to get references (or names) of all of them but 
excluding stuff from moduleA and module B. Is there any pythonic/elegant 
way to do that?

Thanks, Andy


From radam2 at tampabay.rr.com  Sun Apr  3 22:13:29 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Mon, 04 Apr 2005 02:13:29 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
	<mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
	<42506757.1010404@v.loewis.de>
Message-ID: <e3s051p1dfqag3ph7h5f3292294lelk18p@4ax.com>

On Sun, 03 Apr 2005 23:59:51 +0200, "Martin v. L?wis"
<martin at v.loewis.de> wrote:

>Ron_Adam wrote:
>> This would be the same without the nesting:
>> 
>> def foo(xx):
>>     global x
>>     x = xx
>>     return fee
>> 
>> def fee(y):
>>     global x
>>     return y*x
>> 
>> z = foo(2)(6)
>
>Actually, it wouldn't.

Ok, yes, besides the globals, but I figured that part is obvious so I
didn't feel I needed to mention it.  The function call works the same
even though they are not nested functions. 

>> 
>> It's not entirely a misconception. Lets see where this goes...
>> 
>> 
>>>>>>dis.dis(compiler.compile('foo(2)(6)','','eval'))
>>>
>>>  1           0 LOAD_NAME                0 (foo)
>>>              3 LOAD_CONST               1 (2)
>>>              6 CALL_FUNCTION            1
>>>              9 LOAD_CONST               2 (6)
>>>             12 CALL_FUNCTION            1
>>>             15 RETURN_VALUE
>
>Hmm. If you think that this proves that (2)(6) is being *passed*, you
>still might have a misconception. What this really does is:

I didn't say they were passed at the same time by the stack.  It just
shows my reference to *stacks* was correct, and that there's is an
underlying mechanism for calling functions and passing arguments and
functions that use the stack. I however was not yet aware (yesterday
afternoon) of just how the stack worked in this case.  This was very
much a figure it out as you go exercise. 

Yesterday, I had made the incorrect judgement that since the functions
are all nested inside a defined function, that I should treat them as
a group instead of individual functions.  But that wasn't the correct
way of viewing it.  They are in a group in that they share name space,
so I figured, (incorectly), that they shared an argument list somehow,
and those where passed to the group.  The passing of the function, and
it's arguments silently was a big reason for me jumping to this
conclusion.

So my reference to:

>>The interesting thing about this is the 'return fee' statement gets
>>the (6) apparently appended to it. So it becomes 'return fee(6).

Which is not correct, as the order of events is wrong and they do not
share a common argument list.

The correct order is:

return fee
fee(6) 
   
with the fee(6) being evaluated after the return statement is
executed.

Another contributing factor is two days of really poor sleep. Which
probably is a bigger factor than I would like to admit. I really feel
I should have gotten it much sooner.  But I did get-it, a little bit
at a time, and had a lot of terrific help along the way. :-) 

<clip>

>> Or it could be said equally the functions (objects) are passed with
>> the stack. So both view are correct depending on the view point that
>> is chosen.
>
>Maybe I don't understand your view, when you said
>
># No, I did not know that you could pass multiple sets of arguments to
># nested defined functions in that manner.

My views have changed as I added the missing peices to the puzzle
yesterday.

At first I didn't see how they were passed at all, in a group or
otherwise. There wasn't any one-to-one way to match the arguments up
visually like there are in a normal function call.

My next thought was they are passed as a group, to the group of
defined functions that shared the same name space. (Everyone seems to
think I'm stuck on this one.) 

My Next view, yesterday afternoon, was they were passed on a stack
somehow one at a time. This last one is not necessarily incorrect from
a byte code viewpoint, but it's not the best way to view the problem. 

Today I believe I have the correct view as I've said this morning. I
could be wrong yet again. I hope not though I might have to give up
programming. :/

It's interesting that I have had several others tell me they had
trouble with this too.

So it is my opinion that decorators are a little too implicit.  I
think there should be a way to make them easier to use while achieving
the same objective and use. 


Thanks again for the reply,  :)

Cheers,
Ron




From nick at craig-wood.com  Mon Apr 25 05:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 25 Apr 2005 09:30:02 GMT
Subject: Getting into Python, comming from Perl.
References: <mailman.2409.1114365369.1799.python-list@python.org>
Message-ID: <slrnd6pd48.uga.nick@irishsea.home.craig-wood.com>

Miguel Manso <mmanso at amplitudenet.pt> wrote:
>  I'm a programmer with 5 year of experience into Perl. I'm on that point 
>  where you resolve problems without thinking on HOW you'll do it with 
>  that language but only on the problem itself.
> 
>  Since Perl 6 started I've been following it. The conclusion I have is 
>  they're making a whole new language and I'll have to learn it.

I have had a similar experience.  Actually it was Perl 6, and and
particular this chart

  http://www.ozonehouse.com/mark/blog/code/PeriodicTable.html

that made me think that Perl was leaving the rails, and it was time to
jump ship (to mix my metaphors).

That was over a year ago now, and me and my colleagues haven't looked
back.  Yes there was a small amount of retraining, but conceptually
Perl and Python aren't that far apart, its mostly a matter of syntax.

The philosophies of the two languages are quite different though.
Perl's TIMTOWTDI is diametrically opposed to Python's "There should be
one - and preferably only one - obvious way to do it" and I think that
is a major advantage when building bigger programs.  Type "import
this" at the Python interactive prompt to see more about Python's
philosophy, and note that it seems like a direct reaction to Perl's
baroque-ness.

One thing I've definitely noticed is that Python had made me a better
OO programmer.  Its so clunky making objects in Perl that I almost
never did except when making a library.  In Python its so easy that I
don't have to think about it.

>  This being said and, since I've to learn a new language, I've
>  started thinking in a new language. I've noticed Python is getting
>  more and more developers and many projects are being made.
> 
>  I've tryed to use python some times but I get frustrated very quick. I 
>  get myself many times needing to figure out how to loop through a list, 
>  declare an associative array, checking how to pass named parameters to 
>  functions, and simple things like that.
> 
>  What I would like to know is if anyone had these problems and if you can 
>  share that experience with me. I'm trying to minimize my
>  "frustration" :)

I like to read books to retrain myself.  That may not be your way, but
if it is I'd recommend "Dive into Python" by Mark Pilgrim as a good
first step.  Its available for free in electronic form too.  After
that you could read Programming Python.

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


From rbt at athop1.ath.vt.edu  Thu Apr 21 11:25:23 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Thu, 21 Apr 2005 11:25:23 -0400
Subject: recording data between [ and ]
In-Reply-To: <d48gi5$cho$1@panix2.panix.com>
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<d48fc1$2rm$00$1@news.t-online.com> <d48gi5$cho$1@panix2.panix.com>
Message-ID: <d48gl3$ojs$1@solaris.cc.vt.edu>

Roy Smith wrote:
> Diez B. Roggisch <deetsNOSPAM at web.de> wrote:
> 
>>>Yes, it does... may take me a few minutes to get my head around it
>>>though. Why do re's have to be so arcane and complicated... especially
>>>in Python?
>>>
>>>It's hard to preach 'ease of use' with stuff such as this in the
>>>language. Perhaps one day it can be rolled up into something that
>>>*really* is easy to understand:
>>
>>Welcome to the wonderful world of programming. Regular expressions are what
>>they are because they are modeled after a certain theory - that of finite
>>state automata and their correspondence to certain classes of
>>grammars.
> 
> 
> Another way to look at it is that RE's are a programming language of
> their own, and Python just provides an interface to it, just like it
> provides interfaces to databases, network protocols, and operating
> systems.
> 
> RE's predate Python by many years (at least as far back as the early
> 70's in a form we would recognize today), and have evolved over the
> decades to become more powerful.  Unfortunately, with power came
> arcane syntax.  On the good side, most of the time you can use a
> smallish subset of the full RE syntax and still have some pretty
> powerfull pattern matching.
> 
> Python's motto is "there's one way to do it".  Sometimes that means
> "let's do it the way everybody else does it instead of reinventing it
> ourselves".  The Python RE module is certainly an example of that.
> 
> BTW, there's a pretty good Wikipedia article on RE's
> (http://en.wikipedia.org/wiki/Regular_expression).

Thanks guys... nothing against Python... just RE's in general.


From OpenMacNews at speakeasy.net  Sun Apr  3 17:04:33 2005
From: OpenMacNews at speakeasy.net (OpenMacNews)
Date: Sun, 03 Apr 2005 14:04:33 -0700
Subject: can't link Python 2.4.1 against external libxml2 ...
Message-ID: <CD1FD401F62180EF12013B1B@tiedgar>

hi all,

i've successfully built Python-2.4.1 from src on OSX 10.3.8 as a framework 
install with:

    ./configure \
    --enable-framework \
    --with-threads \
    --with-cxx=g++ \
    --enable-ipv6 \
    --enable-toolbox-glue

    make frameworkinstall

i'm next attempting to build same but linking against an external instance of 
libxml2 (v2.6.18) installed in /usr/local ...

i've tried the ususal combinations of setting LDFLAGS and/or assigning 
--with-libs (="/usr/local/lib/libxml2.2.6.18.dylib"), to no avail.

no matter what i do, the build links against the 'native' /usr/lib/libxml* ... 
successful w/ no error, just the 'wrong' lib.

wondering whether i had unusual path probs, i also tried mv'ing the native libs 
out of the way, so that the only instance of libxml* is found in 
/usr/local/lib, but then the make fails, complaining that /usr/lib/libxml* is 
not found. sigh.

i'm fairly sure i'm missing something trivial here ...

any suggestions/pointers as to how to link *my* libxml into the framework build?

thanks!

richard





From littlejohn.75 at news.free.fr  Wed Apr 13 03:20:52 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 13 Apr 2005 07:20:52 GMT
Subject: Doubt regarding sorting of a list specific field
References: <mailman.1817.1113371391.1799.python-list@python.org>
	<6omdnTAhJfc-W8HfRVn-oQ@comcast.com>
Message-ID: <425cc854$0$1959$626a14ce@news.free.fr>

Le Wed, 13 Apr 2005 01:13:40 -0600, Steven Bethard a ?crit :
> praba kar wrote:
>> list = [[1234,'name1'],[2234,'name2'],[0432,'name3']]
>> 
>> I want to sort only numeric value having array field.
>> How I need to do for that. 
> 
> In Python 2.4:
> 
> py> import operator
> py> seq = [(1234,'name1'),(2234,'name2'),(1432,'name3')]
> py> seq.sort(key=operator.itemgetter(0))
> py> seq
> [(1234, 'name1'), (1432, 'name3'), (2234, 'name2')]
> 
> Note that I've changed your name 'list' to 'seq' since 'list' is 
> shadowing the builtin list function in your code, and I've changed your 
> nested lists to tuples because they look like groups of differently 
> typed objects, not sequences of similarly typed objects.  See:
> 
> STeVe
nice explaination. But, if the items of the list are tuples the default
rule for comparing tuples is such that
seq.sort()
would be sufficient here.



From patrick.vergain at free.fr  Mon Apr  4 16:29:44 2005
From: patrick.vergain at free.fr (patrick vergain)
Date: Mon, 04 Apr 2005 22:29:44 +0200
Subject: http://zephyrfalcon.org/labs/wax.html
Message-ID: <d2s84o$h29$1@aphrodite.grec.isp.9tel.net>

http://zephyrfalcon.org/labs/wax.html


Wax
:: Email ::

Download area

	

This page is a stub. Over time, I hope to collect more Wax resources here.

NOTE: Wax currently works (or is supposed to work) with wxPython 2.5.2.7 
or 2.5.2.8. That is the version I am currently using. Newer versions 
might or might not work (try it, though). Older versions might work as 
well, but you'll have to hack the version requirement in core.py.

Download

     * Wax on Sourceforge (main page)
     * Sourceforge releases
     * Sourceforge CVS (may not always be up to date)
     * zephyrfalcon.org download area (often has development versions)
     * Mailing list (via gmane; archives)

Articles

     * The dope on Wax
     * Wax primer: A simple editor
     * Wax demo: a simple file explorer
     * Tao of the Machine Wax archives

Documentation

     * Exception hooks
     * A minimal application
     * Containers
     * Pseudo-properties
     * The Splitter widget
     * Colors
     * Button
     * ArtProvider

(At some point, there will be one link to bind them all... emoticon:loveit)

Third-party tools and programs using Wax

     * ConfigEditor by Mark Andrews


From kentsin at gmail.com  Thu Apr 21 21:31:37 2005
From: kentsin at gmail.com (kent sin)
Date: Fri, 22 Apr 2005 09:31:37 +0800
Subject: Smooth upgrade to New Version
Message-ID: <aa8794290504211831280d862c@mail.gmail.com>

Python is now enter 2.4 era. It is greate, and I want to upgrade too.

However, everytime upgrading to a new version is a great pain. For
every version, we start to re-install what have been in our past
python.

Re-install all packages sometimes require searching for a new version
of binary which in windows were not easy, the same also true for osx.

Are there any plan for smoother version upgrade for upcoming 2.5 or
later? May be with the freely available ms compiler, this problem can
be solved?


-- 
Sin Hang Kin.


From peufeu at free.fr  Wed Apr 13 10:57:21 2005
From: peufeu at free.fr (peufeu at free.fr)
Date: Wed, 13 Apr 2005 16:57:21 +0200
Subject: preallocate list
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j5t4$nqg$1@scotsman.ed.ac.uk>
	<d3j569$5tr$1@solaris.cc.vt.edu>
Message-ID: <op.so6ehvehpda12i@localhost>


what about :

factors = [map(float, line.split()) for line in file]

should be a hell of a lot faster and nicer.

>              for line in f:
>                  factor = []
>                  tokens = line.split()
>                  for i in tokens:
>                      factor.append(float(i))
>                  factors.append(factor)
>
> Is this nasty?
>
> Jim



From g.brandl at gmx.net  Tue Apr  5 15:33:36 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Tue, 05 Apr 2005 21:33:36 +0200
Subject: os.path query functions behavior incorrect?
In-Reply-To: <1112729202.724140.319860@z14g2000cwz.googlegroups.com>
References: <YNy4e.25743$k66.11680@trnddc03>
	<1112729202.724140.319860@z14g2000cwz.googlegroups.com>
Message-ID: <3bg7f8F6g5eglU1@individual.net>

wittempj at hotmail.com wrote:
> It works fine under linux
> martin at ubuntu:~ $ python
> Python 2.3.4 (#2, Feb  2 2005, 11:10:56)
> [GCC 3.3.4 (Debian 1:3.3.4-9ubuntu5)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import os.path
>>>> os.path.exists('/blah')
> False
>>>> os.path.isdir('/blah')
> False
>>>> os.path.isdir('/home/martin')
> True
>>>> os.path.exists('/home/martin')
> True
>>>>

Of course it does. This is not a problem with Unix-style filesystems
because there a directory either exists or not. However, under Windows,
the drive letters for floppies or CDs exists even if there is no media
inserted. It is, of course, questionable whether isdir() and exists()
should return True in this case.

mfg
Georg


From robin at reportlab.com  Tue Apr 26 12:19:39 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 26 Apr 2005 17:19:39 +0100
Subject: regex over files
In-Reply-To: <d4lc6h$hsg$1@sea.gmane.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk><426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<d4l1o8$65v$1@sea.gmane.org>	<426E221D.5020005@chamonix.reportlab.co.uk>
	<d4lc6h$hsg$1@sea.gmane.org>
Message-ID: <426E6A1B.5030900@chamonix.reportlab.co.uk>

Steve Holden wrote:
....
>> .....
>> thanks I'll give it a whirl
>>
> Whoops, I don't think it's a regex search :-(
> 
> You should be able to adapt the logic fairly easily, I hope.
> 
....

The buffering logic is half the problem; doing it quickly is the other half.
The third half of the problem is getting re to co-operate and probably halves 4 
5..... :)
-- 
Robin Becker



From removethis.kartic.krishnamurthy at gmail.com  Sat Apr 23 22:07:25 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sun, 24 Apr 2005 02:07:25 GMT
Subject: GUI woes
In-Reply-To: <mailman.2361.1114307134.1799.python-list@python.org>
References: <mailman.2361.1114307134.1799.python-list@python.org>
Message-ID: <xbDae.3439$L03.1548@newssvr17.news.prodigy.com>

The Great jeff elkins uttered these words on 4/23/2005 5:45 PM:

> test.py crashes with the error below. Any clues?  
> 
> ===========
> 
> Running test.py: 
> 
> Traceback (most recent call last):
>   File "./test.py", line 87, in ?
>     app = MyApp(0)     # Create an instance of the application class
>   File "/usr/lib/python2.3/site-packages/wxPython/wx.py", line 1951, in 
> __init__
>     _wxStart(self.OnInit)
>   File "./test.py", line 76, in OnInit
>     frame = MyFrame(None, -1, "This is a test")
>   File "./test.py", line 26, in __init__
>     self.Bind(wx.EVT_SIZE, self.OnSize)
> AttributeError: MyFrame instance has no attribute 'Bind'

Jeff - Could you please post your code?

 From what you have posted it looks like your MyFrame class does not 
inherit from wx.Frame.

Your class should be defined like this:
class MyFrame(wx.Frame):
	def __init__(self, parent, id, title, pos, size, style):
		wx.Frame.__init__(self, parent, id, title, pos, size, style)
		self.Bind(wx.EVT_SIZE, self.OnSize)
		self.Show(True)

Thanks,
-Kartic


From peter at engcorp.com  Tue Apr  5 10:42:33 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 10:42:33 -0400
Subject: unittest vs py.test?
In-Reply-To: <m3mzsd5n9j.fsf@pc150.maths.bris.ac.uk>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<m3mzsd5n9j.fsf@pc150.maths.bris.ac.uk>
Message-ID: <pP-dncqsttdEPs_fRVn-oA@powergate.ca>

Michael Hudson wrote:
> Peter Hansen <peter at engcorp.com> writes:
>>Where was all that weight that unittest supposedly
>>has?
> 
> For PyPy we wanted to do some things that the designers of unittest
> obviously hadn't expected[1], such as formatting tracebacks
> differently.  This was pretty tedious to do[2], 

I'd agree with that!  The guts of unittest I find to
be somewhat opaque, and not straightforward to extend.
Trying to do so here has also proven tedious, though
ultimately feasible, as you say the PyPy folks have
found.

Which, in the end, is precisely why I just use the
simplest vanilla approach that I can, no different
than anything done, for example, in the excellent
chapter on testing in http://www.diveintopython.org
or other examples of using unittest.

unitttest is surely not the be all and end all of
Python unit testing frameworks...  but it's one of
the batteries included in the standard distribution,
and it's pretty trivial to get started using it,
unless maybe you try to go by the documentation instead
of by the examples...

-Peter


From greg at cosc.canterbury.ac.nz  Wed Apr  6 00:33:24 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 06 Apr 2005 16:33:24 +1200
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<mailman.1412.1112744591.1799.python-list@python.org>
	<ald651ho9tp44fjm4tniso2kferu65e7l3@4ax.com>
Message-ID: <3bh752F6gf4gcU1@individual.net>

Ron_Adam wrote:
> I would have preferred the @ symbol to be used as an inline assert
> introducer.  Which would have allowed us to put debug code anywhere we
> need.  Such as   @print total @.

Don't lose heart, there are still two unused characters
left, $ and ?.

? might even be more mnemonic for this purpose, as

     ?print "foo =", foo

has a nice hint of "WT?%$%$ is going on at this point?"
to it.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From andreis at stud.cs.uit.no  Tue Apr 12 06:23:18 2005
From: andreis at stud.cs.uit.no (=?ISO-8859-1?Q?Andr=E9_S=F8reng?=)
Date: Tue, 12 Apr 2005 12:23:18 +0200
Subject: Overlapping matches in Regular Expressions
Message-ID: <d3g7ih$21uf$1@news.uit.no>


With the re/sre module included with Python 2.4:

pattern = "(?P<id1>avi)|(?P<id2>avi|mp3)"
string2match = "some string with avi in it"
matches = re.finditer(pattern, string2match)
...
matches[0].groupdict()
{'id2': None, 'id1': 'avi'}

Which was expected since overlapping matches are ignored.
But I would also like to know if other groups had a match.
What modifications to the re/sre module is needed to allow
overlapping matches?


From skemplay at gmail.com  Fri Apr  1 05:48:52 2005
From: skemplay at gmail.com (Sean Kemplay)
Date: Fri, 1 Apr 2005 20:48:52 +1000
Subject: Ternary Operator in Python
In-Reply-To: <wJKdnTn7TsW5g9DfRVn-pw@speakeasy.net>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<mailman.1174.1112342585.1799.python-list@python.org>
	<wJKdnTn7TsW5g9DfRVn-pw@speakeasy.net>
Message-ID: <b96eed25050401024886f00bb@mail.gmail.com>

On Apr 1, 2005 8:10 PM, Erik Max Francis <max at alcyone.com> wrote:
> Sean Kemplay wrote:
> 
> > You could use
> >
> > condition and consequent or alternative
> >
> > I use it
> 
> You should do so cautiously, since if consequent is false, it will not
> behave as suspected.  Not to mention that it's quite unreadable.
> 
> --
> Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
> San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
>    Physics, as we know it, will be over in six months.
>    -- Max Born (1928)
> --
> http://mail.python.org/mailman/listinfo/python-list
> 

I should have mentioned that, as I have been caught out before.

Sean


From pinard at iro.umontreal.ca  Tue Apr 19 14:36:13 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Tue, 19 Apr 2005 14:36:13 -0400
Subject: def a((b,c,d),e):
In-Reply-To: <1113932491.072447.146420@o13g2000cwo.googlegroups.com>
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<mailman.2066.1113863546.1799.python-list@python.org>
	<1113898210.973052.255840@l41g2000cwc.googlegroups.com>
	<mailman.2102.1113918923.1799.python-list@python.org>
	<1113932491.072447.146420@o13g2000cwo.googlegroups.com>
Message-ID: <20050419183613.GA16513@alcyon.progiciels-bpi.ca>

[George Sakkis]

> Allowing non-default arguments after *varargs doesn't make sense,

In R, one may use the ... format argument anywhere in the argument list,
but may later test if a non-default argument was provided or not.  I
tend to write R a bit like I would write Python, but hopefully, I'll
eventually understand R enough that I could break that habit.

> > keywords may be abbreviated, and much more hairy,

> Hmm.. -1 on this. It may save a few keystrokes, but it's not good for
> readability and maintenability.

That was my first impression too.  Yet, interactively, I found that
feature very convenient.  Already with Python, I use shortcuts
interactively that I would not write nor keep in real, saved, permanent
programs.  And for very common functions and features, which are not
really fluctuating anymore, some abbreviations became well known idioms.

> > the computation of actual expressions given as arguments is lazily
> > postponed until their first use within the function.

> Is this like an implicit lambda before each argument ?

Not exactly true, but that's surely a way of understanding it.  Such
things are not new: I first saw them in Algol-60, except that once an
argument has been evaluated, it is cached and not evaluated again.  It's
true that in R, much more than in Python, evaluation of an argument may
often be computationally expensive.

Moreover, in R, the initial writing of the argument is preserved on
the form of a parsed tree which can be operated upon.  This allow
for strange things (at least for a Python eye), like computing the
symbolic derivative of an argument.  I toyed with this facility to build
mathematical images, and then, animations.  For an exemple, see:

   http://pinard.progiciels-bpi.ca/plaisir/NRart/

and from there, click on `nr.image' near the end.

> If so, why does it have to be restricted to function arguments ? It
> seems to me that argument passing and lazy evaluation are orthogonal
> dimensions.

In R, laziness is automatic while calling functions, but not otherwise,
and from what I saw so far, less meaningful in other contexts anyway.
However, I think laziness is available explicitely if needed (there is
library function that returns a "promise" of its argument).

> Or for a more exotic use:

> def prologLikeSum(a=s-b, b=s-a, s=a+b):
>     return a,b,s
> prologLikeSum(1,2) == prologLikeSum(1,s=3) == prologLikeSum(b=2,s=3) ==
> (1,2,3)

This is exactly how R people use the feature most of the times (at least
so far that I naively saw, as I'm still pretty new at all this).

> This seems pretty hard to change though.

Oh, I would not even dream about it for Python.  The idea would have to
make its way first within the developers, and this might take years, if
ever.  The best I (we) could do is keep the idea in the air, for a good
while.  It would likely never survive all the debates it would generate.
But who knows! :-)

> [...] and even worse, [bindings] would have to be computed for each
> call, as the prologLikeSum example shows.

Yet, already, as it stands, argument passing in Python is not innocuous.
A bit more, a bit less, nobody would notice! :-)

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From willitfw at gmail.com  Tue Apr 26 18:15:35 2005
From: willitfw at gmail.com (willitfw)
Date: 26 Apr 2005 15:15:35 -0700
Subject: schedule a monthly ftp event
Message-ID: <1114553735.360210.290000@f14g2000cwb.googlegroups.com>

Greetings,
I am looking for some guidance on a script.

My goals are:
1) have this script run automatically through a time set schedule.
2) verify if a file is updated on an ftp site (usually on the 15th of
the month).
3) If the updated file exists, ftp it to local drive.
4) e-mail other users when the file has been updated on the local
drive.

I realize this is quite extensive, but any leads or source code will be
appreciated.

Thanks,
Tom W.



From andrea_gavana at tin.it  Fri Apr  1 19:02:31 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Sat, 2 Apr 2005 02:02:31 +0200
Subject: How To Do It Faster?!?
Message-ID: <42000634000201FA@ims9c.cp.tin.it>

Hello Jeremy & NG,

>Yes, clearer, though I still don't know what you're *doing* with that data
:-)

Every user of thsi big directory works on big studies regarding oil fields.
Knowing the amount of data (and number of files) we have to deal with (produced
by simulators, visualization tools, and so on) and knowing that users are
usually lazy in doing clean up of unused/old files, this is a way for one
of us to "fast" scan all the directories and identify which files belong
to him. Having them in an organized, size-sorted wxPython list, the user
can decide if he want to delete some files (that almost surely he forgot
even that they exist...) or not. It is easy as a button click (retrieve
the data-->delete the files).

>Here's an idea to sort of come at the problem from a different angle. Can
>you run something on the file server itself, and use RPC to access it?

I don't even know what is RPC... I have to look at it.


>The reason I mention this is a lot of UNIXes have an API to detect file
>changes live; for instance, google "python fam". It would be easy to hook
>something up to scan the files at startup and maintain your totals live,
>and then use one of the many extremely easy Python RPC mechanisms to
>request the data as the user wants it, which would most likely come back
>at network speeds (fast).

I am not sure if my new explanation fits with your last information... as
above, I didn't even know about fam... I've read a little, but probably
I am too newbie to see a link between it and my scope. Do you think it exists?
It would be nice to have something that tracks the file status on all the
file system, but probably is a LOT of work wrt what my app should be able
to do.
Anyway, thanks for the hints! If my new explanation changed something, can
anyone post some more comments?

Thanks to you all.

Andrea.



From der_tank at web.de  Mon Apr 18 18:36:40 2005
From: der_tank at web.de (Sven Kobow)
Date: Mon, 18 Apr 2005 22:36:40 +0000
Subject: Tiny fonts in wxPython app
Message-ID: <42641a4f_2@news.arcor-ip.de>

Hello,

I'm not yet a python programmer but a python user. I faced a problem
with tiny fonts in a wxPython app on a GNU/Debian system. Under Gentoo
Linux the fonts are displayed in a normal readable size. Only on that
Debian system fonts in the whole app are rather tiny. I spend quite a
long time googling for a solution and found several hints on font
problem issues in wxPython but none fitted to that mentioned above. Does
anybody has a clue what can be wrong?

Thanx


From Guy_Bolton-King at non.agilent.com  Fri Apr  1 07:49:44 2005
From: Guy_Bolton-King at non.agilent.com (Guy Bolton King)
Date: 01 Apr 2005 13:49:44 +0100
Subject: Stylistic question about inheritance
References: <fgY2e.493073$w62.132731@bgtnsc05-news.ops.worldnet.att.net>
	<1112300578.456411.274110@f14g2000cwb.googlegroups.com>
	<B3Z2e.493303$w62.60800@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <4nxd5teu0ev.fsf@tsdsles9-2.britain.agilent.com>

"Andrew Koenig" <ark at acm.org> writes:

> "Lonnie Princehouse" <finite.automaton at gmail.com> wrote in message 
> news:1112300578.456411.274110 at f14g2000cwb.googlegroups.com...
> 
> > If you try this sort of inheritance, I'd recommend writing down the
> > formal grammar before you start writing classes.  Don't try to define
> > the grammar through the inheritance hierarchy; it's too easy to
> > accidentally build a hierarchy that can't be translated into a
> > single-pass-parsable grammar...
> 
> Understood.  I was using expression trees as a contrived example, and really 
> want to know about the Python community's stylistic preferences for defing 
> such hierarchies that don't absolutely need a root.

Oddly enough, I've just been pondering the same question (albeit for
Perl, but the same reasoning applies).  The only cases I've found
useful thus far are:

  - implementation inheritance (in the case of default methods in a
    callback interface class):

      class CallbackInterface:

          def handleEvent(self, event):
              """Handle an event"""
              pass

          def handleSignal(self, signal):
              """Handle a signal"""
              pass

    This also helps to document what's expected of callback classes,
    even though they don't _have_ to inherit CallbackInterface
    (enforcing this through isinstance() in the calling class would be
    rude).

  - hierarchies of exception classes (allowing one to catch general
    classes of exceptions, since except implicitly uses isinstance(),
    rather than a specific class).  Of course, Python already has a
    hierarchy of exceptions.  I had to implement my own for Perl.

>From a brief skim of http://www.python.org/moin/PythonThreeDotOh it
looks like interfaces _may_ be added to Python 3.0, but they sound
more like (IIRC) ML's signatures and C++'s Standard Library
requirements i.e. a requirement that the class implements certain
functions, rather than a requirement to inherit from a particular base
class.

Guy.


From aleksander.helgaker at gmail.com  Fri Apr 22 10:45:40 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 22 Apr 2005 07:45:40 -0700
Subject: Overiding error message when using a python program
Message-ID: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>

I've completely rewritten a calculator I wrote to help me learn Python.
After someone told me about the def command I reliesed that I could
make the program much better, but there is a very anoying problem which
ocours when I run the program.

Here is the code
<code>
# IMPOSRTS #
import sys
import os

# DEF'S #
def print_intro():
	os.system('clear')
	print "Welcome to Calc v 0.1a"
	print "----------------------"

def main():
	print_intro()
	while True:
		prompt_user()

def prompt_user():
	userinput = input(">")

def fib(n): # write Fibonacci series up to n
	"""Print a Fibonacci series up to n."""
	a, b = 0, 1
	while b < n:
		print b,
		a, b = b, a+b
		print

def quit():
	sys.exit()

# PROGRAM FLOW
main()
</code>

Now when I run this program and I type in a command which I have no
code for e.g. "pi" (which is 3,14....) I get the error message
"NameError: name 'pi' is not defined" and then the program quits.

I'm creating this program for my own use but naturally sometimes I
would make spelling mistakes (being a dyslexic and all) and so having a
long error message and having the program quit is more then a bit
irritating. It would be much more preferable if the program simply
wrote "Command not recognised" and then kept going. Is this possible?



From mynews44 at yahoo.com  Mon Apr 25 09:36:52 2005
From: mynews44 at yahoo.com (googleboy)
Date: 25 Apr 2005 06:36:52 -0700
Subject: what is the best way to determine system OS?
Message-ID: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>

Hi there.

I am writing a little app tha tI would like to make cross-platform
(debian, RH, Fedora, Solaris, AIX, etc)

Originally I decided to check what uname returned, as I didn't think it
mattered beyond the detail of Linux or SunOS etc.

Recently I have learned that FC3 breaks my script,  so I need to be
able to determine not simply "Linux" but to know exactly what unix the
script is being run on.

What is the best way to determine this?

Thanks!

googleboy



From thomas at eforms.co.nz  Wed Apr 27 23:45:50 2005
From: thomas at eforms.co.nz (Thomas)
Date: Thu, 28 Apr 2005 15:45:50 +1200
Subject: urllib2 file upload error
Message-ID: <20050428034352.4F57237025@mail.tintz.co.nz>

 

 

import urllib2

URL = 'http://xxx.xxx.xxx.xxx/UploaderHttp/'

FILE= 'c:/Documents and Settings/Administrator/Desktop/Vousleve 1 .pps';

d = [ ('cmd', 'add-item'),

      ('protocol_version', '2.1'),

      ('userfile', open(FILE)),

    ]

req = urllib2.Request(URL, d)

try:

    u = urllib2.urlopen(req)

except urllib2.HTTPError, errobj:

    print "HTTPError:", errobj.code

else:

     buf = u.read()

     print "OK"

 

 

 

Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
win32

Type "help", "copyright", "credits" or "license" for more information.

>>> ## working on region in file
c:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/python-1396n5Q.py...

Traceback (most recent call last):

  File "<stdin>", line 1, in ?

  File "c:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/python-1396n5Q.py", line 11, in ?

    u = urllib2.urlopen(req)

  File "c:\Python23\lib\urllib2.py", line 129, in urlopen

    return _opener.open(url, data)

  File "c:\Python23\lib\urllib2.py", line 326, in open

    '_open', req)

  File "c:\Python23\lib\urllib2.py", line 306, in _call_chain

    result = func(*args)

  File "c:\Python23\lib\urllib2.py", line 901, in http_open

    return self.do_open(httplib.HTTP, req)

  File "c:\Python23\lib\urllib2.py", line 888, in do_open

    h.send(data)

  File "C:\Python23\lib\httplib.py", line 576, in send

    self.sock.sendall(str)

  File "<string>", line 1, in sendall

TypeError: sendall() argument 1 must be string or read-only buffer, not list

 

 

 

 

Tried the script from http://fabien.seisen.org/python/urllib2_multipart.html
also

 

Getting similar error..

 

Cheers

Thomas

 

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From ivanlan at pauahtun.org  Tue Apr 19 11:45:48 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 19 Apr 2005 09:45:48 -0600
Subject: Name/ID of removable Media: how?
References: <9A28C052FF32734DACB0A288A3533991EBB78E@vogbs009.gb.vo.local>
Message-ID: <426527AC.B805C534@pauahtun.org>

Hi All--

Tim Golden wrote:
> 
> Try this: hex (-793919769)
> 
> You might need to check back on recent discussions here re
> negative / positive numbers and hexadecimal.
> 
> (Short version: we used to treat hex numbers with the top bit
> set as negative decimal numbers; now only negative hex numbers
> are negative decimals)
> 


Of course I tried that.  Did you?


Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> hex (-793919769)
'-0x2f524119'
>>>


Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From sdementen at hotmail.com  Wed Apr 13 06:49:59 2005
From: sdementen at hotmail.com (Sebastien de Menten)
Date: 13 Apr 2005 03:49:59 -0700
Subject: args attribute of Exception objects
References: <mailman.1526.1112952761.1799.python-list@python.org>
	<pan.2005.04.08.16.07.30.85408@jerf.org>
	<8dad5312.0504110231.68f6a21b@posting.google.com>
	<425ae097.133343848@news.oz.net>
	<8dad5312.0504120057.19c60370@posting.google.com>
	<425b979f.180199683@news.oz.net>
Message-ID: <8dad5312.0504130249.46a64403@posting.google.com>

> Did I misunderstand the problem again?

Hmmm, yes ! But I think I am not expressing clearly my concern :-)

So my problem is that "default exception" are badly designed in their
use of their args attribute.

I know it is possible to subclass Exception as every object and add
the attributes I want with the name I want, etc...

BUT, some (if not most) default exceptions in __builtins__ use the
args attribute and put a string in it without delivering interesting
information about the exception.

So 1) I think it is nice to keep args as name for the attribute as it
avoids looking at the documentation for looking at each specific
exception/attribute name.
   2) but args should be more cleverly designed (again, I am speaking
about exceptions in __builtins__ not user defined exceptions) and not
be a simple string.

Now, forcing user to avoid using default exceptions (i.e. force them
to use user defined exceptions) for anything but interactive use or
debugging is short minded (nobody says that, but the current situation
implies that).

Anyway, I log this as request on SF.

Best regards,

Sed


From bokr at oz.net  Tue Apr 12 16:25:58 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 12 Apr 2005 20:25:58 GMT
Subject: Why won't someone step up and make use of the Free tools (was
	Re: Python 2.4 killing commercial Windows Python development ?)
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<mailman.1760.1113313382.1799.python-list@python.org>
Message-ID: <425c29b6.217598109@news.oz.net>

On Tue, 12 Apr 2005 08:42:54 -0500, Jeff Epler <jepler at unpythonic.net> wrote:

>
>--7iMSBzlTiPOCCT2k
>Content-Type: text/plain; charset=us-ascii
>Content-Disposition: inline
>
>I'm sorry that this is going to come out sounding like a flame, but it
>seems to me that there today only a few technical problems remaining
>with Python when built with mingw32.
>
>If one of the people who has expressed such deep concern about this
>"msvcr71.dll" problem would simply install the Free tools and start
>putting patches on sourceforge, it's quite possible that for the next
>2.4.x release the mingw32 "port" could be a first-rate one, and suitable
>for the uses that the posters in this thread have mentioned.
>
>Since mingw32 is Free (gpl and other licenses for tools, public domain
>libraries and copyrighted headers with "no restrictions for programs"
>built using the headers) anyone can install and use these tools and
>mingw creates no new problems with distribution of the resulting binary,
>whether the final product is Free or proprietary.
>
>(Admittedly I don't know anything about whether "win32all" builds under
>mingw32, and it's not clear whether binary compatibility with extensions
>built by microsoft compilers is an easy goal either)
>
>http://www.mingw.org/
>
+1
But credit where due. Someone has stepped up to a large chunk of the problem:

   http://jove.prohosting.com/iwave/ipython/pyMinGW.html

I am running a usable-for-most-purposes version of 2.4, that with the help of
an older version of the above (I should upgrade all those tools, but ;-)
I succeeded in building. It was the only way I could go from 2.3 to 2.4, since
the MS .msi installer stuff from MS does not itself install successfully on my NT4 ;-/

I am thinking that I'd like to make a script that would ease pulling all the pieces
from the net (urllib, and md5 checks to download stuff, a state log that would
permit easy resuming when something glitches, and automated dialogs for typical
installer info re locations preferences etc. But I got to thinking about sourceforge's
downloading interface choosing mirrors, and thought "later" ;-)

Well, when I get my next system ;-) But it may be moot, 'cause it will probably be Linux
or BSD (both of which I have on another old box which is too slow for X ;-)

Trouble is, I have banged on the pinching spots in my old NT shoes long enough
to where they are relatively comfy for my regular ambulations ;-)

Regards,
Bengt Richter


From ckwiguno at gmail.com  Sat Apr 30 14:25:29 2005
From: ckwiguno at gmail.com (custard_pie)
Date: 30 Apr 2005 11:25:29 -0700
Subject: Directory in Windows
In-Reply-To: <4273c141_1@newspeer2.tds.net>
References: <1114882248.306624.199600@o13g2000cwo.googlegroups.com>
	<4273c141_1@newspeer2.tds.net>
Message-ID: <1114885529.537692.178620@l41g2000cwc.googlegroups.com>

Here's my code
========================================================
filelist={}
def listFiles(self, dirName, filesInDir):
	for fname in filesInDir:
		if os.path.isfile(fname):
			key = os.path.join(dirName, fname)
			stats = os.stat(fname)
			filelist[key] = (stats[stat.ST_MTIME], stats[stat.ST_SIZE])
os.path.walk(string.strip(self.path.get()), listFiles, None)
print filelist
=======================================================
I change: if not os.path.isdir(fname) to if os.path.isfile(fname)
because some directories are not recognized as directory, and I get an
error message because os.stat is called with the directory as arg. But
even after I change it into isfile(). There are still some
errors,..some images in the subdirectories won't get printed...
Help please....



From chirayuk at gmail.com  Mon Apr  4 02:51:37 2005
From: chirayuk at gmail.com (Chirayu Krishnappa)
Date: 3 Apr 2005 23:51:37 -0700
Subject: Corectly convert from %PATH%=c:\\X; "c:\\a;
	b" TO ['c:\\X', 'c:\\a; b']
References: <1112484475.908682.278880@f14g2000cwb.googlegroups.com>
	<mailman.1249.1112491243.1799.python-list@python.org>
	<1112520171.853820.90010@o13g2000cwo.googlegroups.com>
	<mailman.1262.1112552985.1799.python-list@python.org>
Message-ID: <1112597497.587466.224550@f14g2000cwb.googlegroups.com>

I do agree that it is a crazy format - and am amazed that it works at
the prompt.

For the first case - you have a mismatched double quote for test2 at
the end of the string. test2 should be r'c:\A"\B;C"\D;c:\program
files\xyz' instead. For the 2nd case - my code swallowed the ';' it
split on - so I need a acc.append (';') just before the acc.append(p)
in Accumulate. The code then works. It needs to be fixed to take care
of extra double quotes and also a missing one (cmd.exe appeats to
assume one at the end if it did not find one.)

The itertools.splitby idea sounds really cool. I did not feel like
writing a state machine as the state was so simple to maintain here -
but I'd like to write a splitby so that it makes it easier to do such
crazy splitting in general.

Chirayu.



From dwelch at vcd.hp.com  Fri Apr 15 11:42:15 2005
From: dwelch at vcd.hp.com (djw)
Date: Fri, 15 Apr 2005 08:42:15 -0700
Subject: Python's use in RAD
In-Reply-To: <mailman.1972.1113576517.1799.python-list@python.org>
References: <mailman.1972.1113576517.1799.python-list@python.org>
Message-ID: <d3onii$rl0$1@news.vcd.hp.com>

Ross Cowie wrote:
> Hi,
> 
> I am currenly a second year university student and was wondering if you 
> could help me ut. As part of a project i have decided to write about 
> python, i am not having very much luck with regards to finding 
> infrmation on pythons use in Rapid Application Development, and was 
> wondering of you could highlight some of the features that make it 
> suitable for RAD. Like the use of dinamic binding.
> 
> Your healp would be appreciated.
> 
> Hope to hear from you soon.
> 
> Ross
> 
> 
I got plenty of info in < 1 min using Google and the query "python rad". 
Does your university not have access to Google?

http://www.ukuug.org/events/linux2001/papers/html/CEgli/Gnome-Talk.html
http://www.iol.ie/~padraiga/talks/pygtk/
http://www.linuxjournal.com/article/7421
http://pythonnotes.blogspot.com/2005/03/rad-style-programming-for-web-apps.html
http://www.pythonology.com/success&story=philips
http://librenix.com/?inode=3701
http://linuxgazette.net/issue78/krishnakumar.html
http://www.pycs.net/lateral/stories/16.html
http://dot.kde.org/1073680602/
etc...etc...etc...


From kasimov at i.com.ua  Wed Apr 20 10:00:55 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 17:00:55 +0300
Subject: goto statement
In-Reply-To: <N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
Message-ID: <42666097.3040405@i.com.ua>

Peter Hansen wrote:
> Maxim Kasimov wrote:
> 
>> Torsten Bronger wrote:
>>
>>> Hall?chen!
>>>
>>> Maxim Kasimov <kasimov at i.com.ua> writes:
>>>
>>>>
>>>> WOW, just greate! ... but i'd like to relax at some more
>>>> interesting way than to comment each of rows
>>
>>
>> but what if i just can't to do this becouse i'm working thrue ssh, and 
>> have to use only installed editors (such as vi)
> 
> 
> Surely you use more than one-character indents?  If
> that's so, you can just insert the "if 0:" using, say,
> two characters indentation instead of the usual four.
> Then the following four-character-indented code is
> removed.
> 
> Alternatively, use ''' and ''' surrounding the code
> block and it will be ignored.
> 

  uuuuf..., i don't requesting that "goto" was available in next versions of python,
  but i'm saying if it will be so, it will be easy and quickly _debug_ some skripts,
  _not only_ for commenting

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From neuhauser+python-list#python.org at sigpipe.cz  Sun Apr 17 09:27:25 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Sun, 17 Apr 2005 15:27:25 +0200
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <d3tmcu$bu0$1@sea.gmane.org>
References: <20050417124752.GA1482@isis.sigpipe.cz>
	<d3tmcu$bu0$1@sea.gmane.org>
Message-ID: <20050417132725.GB1482@isis.sigpipe.cz>

# fredrik at pythonware.com / 2005-04-17 14:59:50 +0200:
> Roman Neuhauser wrote:
> 
> >>Here's a puzzle for you: Where does this list appear? What's missing?
> >>
> >>"..., Mullender, Nagata, Ng, Oner, Oppelstrup, ..."
> >
> >   Sorry, I don't have time for puzzles.
> 
> nor for contributing, it seems.  otherwise, your name would be on that list.

    Right. There's a finite number of hours in a day, and I chose
    to spend most of it on FreeBSD, and my name is on that operating
    system's contributor list. You're welcome to use the results of
    the work.

    But anyway, I was honestly asked about what I considered suboptimal
    in the python documentation, and I honestly answered. Does that
    bother you?

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From tim.peters at gmail.com  Thu Apr  7 02:28:31 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 7 Apr 2005 02:28:31 -0400
Subject: sorting a list and counting interchanges
In-Reply-To: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
Message-ID: <1f7befae05040623281db9c5cc@mail.gmail.com>

[RickMuller]
> I have to sort a list, but in addition to the sorting, I need to
> compute a phase factor that is +1 if there is an even number of
> interchanges in the sort, and -1 if there is an odd number of
> interchanges.

So you want the parity ("sign") of the associated permutation.

> I could write a bubble sort, count the number of interchanges, and
> compute the factor, but I have a feeling that there some
> decorate-sort-undecorate solution buried in this problem somewhere.
> However, I can't see it. Can anyone else help me with this?
>
> I was thinking of something along the lines of zipping the list with a
> range() of the same length, sorting that, and then counting the number
> of times the second list has an item smaller than its previous item. In
> other words
> 
> a = [1,10,2,7]
> b = zip(a,range(len(a)))
> b.sort()
> a_sorted = [i for i,j in b]
> order = [j for i,j in b]

Good so far -- keep that much.  Pass `order` to the function below. 
It computes the sign in linear time.

> phase = 0
> for i in range(len(order)-1):
>    if order[i] > order[i+1]: phase += 1

That part isn't correct.  For example, it computes phase == 1 for both

    [1, 0, 2]
and
    [1, 2, 0]

but those obviously have different parities (since they're one
transposition apart).

> phase = 2*(phase%2)-1
>
> However, I can't prove that this works,

See above for why <wink>.

> and there's *got* to be a more elegant way.

Why?  There's no efficient way to solve this via counting
transpositions directly, although there is an efficient way by
computing the cycle structure.  The following is an elegant way to do
the latter, but "elegance" requires buying into that this is necessary
if you want an efficient solution.

def permsign(p):
    """Return sign of permutation p.

    p must be a permutation of the list range(len(p)).
    The return value is 1 if p is even, or -1 if p is odd.

    >>> for p in ([0,1,2], [0,2,1], [1,0,2],
    ...           [1,2,0], [2,0,1], [2,1,0]):
    ...     print p, permsign(p)
    [0, 1, 2] 1
    [0, 2, 1] -1
    [1, 0, 2] -1
    [1, 2, 0] 1
    [2, 0, 1] 1
    [2, 1, 0] -1
    """

    n = len(p)
    rangen = range(n)
    if sorted(p) != rangen:
        raise ValueError("p of wrong form")

    # Decompose into disjoint cycles.  We only need to
    # count the number of cycles to determine the sign.
    num_cycles = 0
    seen = set()
    for i in rangen:
        if i in seen:
            continue
        num_cycles += 1
        j = i
        while True:
            assert j not in seen
            seen.add(j)
            j = p[j]
            if j == i:
                break

    return (-1)**(n - num_cycles)


From claudio.grondi at freenet.de  Tue Apr 19 08:46:56 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 19 Apr 2005 12:46:56 -0000
Subject: Name/ID of removable Media: how?
References: <d42lho$fbf$1@news.mch.sbs.de>
Message-ID: <3ck5t7F6ncf6iU1@individual.net>

There are sure thousand ways
of doing it "with windoze".
Here one of them (NOT tested) in form
of code snippets you can rearrange
for your purpose:

import win32com.client
axFSO = win32com.client.Dispatch("Scripting.FileSystemObject") # SCRRUN.DLL
axLstDrives = axFSO.Drives

dctAXaxFSO_NumCodeAsKeyVsTypeDescrText = {
    0 : "unknown type of drive"
  , 1 : "drive with removable medium (e.g. Floppy)"
  , 2 : "fixed drive (e.g. harddisk)"
  , 3 : "remote (i.e. network) drive"
  , 4 : "CD-ROM drive"
  , 5 : "RAM-Disk drive"
}

lstdriveLetterOFonSYSTstorageDevice = []
lstdriveTypeOFonSYSTstorageDevice = []

for axDrive in axLstDrives:
  if(axDrive.IsReady): # checks if a CD is inserted
    lstdriveLetterOFonSYSTstorageDevice.append(
      axDrive.DriveLetter.encode()
    )
    lstdriveTypeOFonSYSTstorageDevice.append(
      dctAXaxFSO_NumCodeAsKeyVsTypeDescrText[axDrive.DriveType]
    )
    # axDrive.SerialNumber
    # axDrive.VolumeName.encode()
    # for more of this kind just check out e.g. in the by Microsoft
    # free available JScript tutorial the chapter
    # "FileSystemObject Sample Code"
  #:if
#:for

Hope this helps.

Claudio



"Heiko Selber" <heiko.selber at siemens.com> schrieb im Newsbeitrag
news:d42lho$fbf$1 at news.mch.sbs.de...
> I am trying to find out (using Python under windows) the name of a CD that
> is currently in the drive specified by a path name.
>
> And while I am at it, I'd also like to know whether the specified drive
> contains a CD at all, and whether the drive is actually a CD drive.
>
> AFAIK, Python doesn't provide a way to do it, and a search in the web
> yielded only soutions for Linux.
>
> Can anyone show me a solution that works with windoze?
>
> TIA,
>
> Heiko
>
>




From gerald.maher at waytohere.com  Mon Apr 11 15:30:09 2005
From: gerald.maher at waytohere.com (gerald.maher at waytohere.com)
Date: 11 Apr 2005 12:30:09 -0700
Subject: Problem with import "from omniORB import CORBA, PortableServer"
Message-ID: <1113247809.688746.233970@z14g2000cwz.googlegroups.com>

Hi,

I am trying to excuate the follwong code:

[
import sys
from omniORB import CORBA, PortableServer
]

I get the following error:
[
Traceback (most recent call last):
  File
"C:\omniORBpy-2.5-win32-python2.3\omniORBpy-2.5\examples\echoMyTest\example_echo_coloc.py",
line 9, in ?
    from omniORB import CORBA, PortableServer
ImportError: No module named omniORB
]

Here is my Lib path:
['C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\examples\\echoMyTest',
'C:\\omniORB\\omniORB-4.0.3\\lib\\python',
'C:\\omniORB\\omniORB-4.0.3\\lib\\x86_win32',
'C:\\WINNT\\system32\\python24.zip', 'C:\\Python24',
'C:\\Python24\\DLLs', 'C:\\Python24\\lib',
'C:\\Python24\\lib\\plat-win', 'C:\\Python24\\lib\\lib-tk',
'C:\\Python24\\Lib\\site-packages\\pythonwin',
'C:\\Python24\\lib\\site-packages',
'C:\\Python24\\lib\\site-packages\\win32',
'C:\\Python24\\lib\\site-packages\\win32\\lib',
'C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\examples\\echoMyTest',
'C:\\omniORB\\omniORB-4.0.3\\lib\x86_win32',
'C:\\omniORB\\omniORB-4.0.3\\lib\x86_win32']

What am i doing wrong ?



From gharper at medplus.com  Wed Apr 13 11:34:57 2005
From: gharper at medplus.com (Harper, Gina)
Date: Wed, 13 Apr 2005 11:34:57 -0400
Subject: Codig style: " or """
Message-ID: <4D97153E7D88F44FB6B534C661EE429003380D8A@medexch1.medplus.com>

Try PEP 8, Guido's Style Guide:
http://www.python.org/peps/pep-0008.html
Good luck with your boss!

*gina*

-----Original Message-----
From: Sara Khalatbari [mailto:sarapythonlist at yahoo.com] 
Sent: Wednesday, April 13, 2005 11:13 AM
To: Python List
Subject: Codig style: " or """


Hi!

Suppose you're writing a module & writing the
definition of each function in that module in " or
""".
for example:
a) "This function does this & that"
or:
b)  """This function does blah blah blah"""

What are the differences between " and """ ? 
I'm using gedit & I wanna know a bit about coding
style.

To be very honest: I have a very strict boss who looks
for bugs in my codes & he insists to know exactly
which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
my coding style on when using " or """.

Can anybody out there give me some hint?
Can anybody tell me where to find a document on python
coding style.

tnx,
Sara


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/



From bill.mill at gmail.com  Fri Apr  1 15:34:42 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 1 Apr 2005 15:34:42 -0500
Subject: Pseudocode in the wikipedia
In-Reply-To: <200504011215.35188.jstroud@mbi.ucla.edu>
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>
	<d2k70u$70h$1@sea.gmane.org> <200504011215.35188.jstroud@mbi.ucla.edu>
Message-ID: <797fe3d40504011234cc7605e@mail.gmail.com>

On Apr 1, 2005 3:15 PM, James Stroud <jstroud at mbi.ucla.edu> wrote:
> Is anybody else bothered by those stupid pascal-like ":=" assignment
> operators?
> 

I actually like them. I think that the = should be a comparison
operator, not a silly ==. I think that comparisons using = are much
clearer, especially since you often write many of them in a row,
whereas you almost always make one assignment per line.

I use := every day in PL/SQL, and it's one of the few positive
syntactical features of the language.

Peace
Bill Mill
bill.mill at gmail.com


From dwyoon at purunSPAMinfo.co.kr  Mon Apr 11 01:07:38 2005
From: dwyoon at purunSPAMinfo.co.kr (Daewon YOON)
Date: Mon, 11 Apr 2005 14:07:38 +0900
Subject: non-ascii charater image gereration with PIL
Message-ID: <d3d08e$ejh$1@news.kreonet.re.kr>

Hi. I'm a newbie to this python world.

PIL has 'text(position, string, options)' method in its ImageDraw module.
Does this work with unicode or other 2byte encoded string?
It seems not working on my python2.3.5 with PIL 1.1.5.

How can I accomplish this task? Specifically I'm trying to generate
Hangeul characters (Korean characters) images from txts encoded
either in euc-kr, cp949, or unicode with TTF files.

--
zooy


From modelnine at ceosg.de  Mon Apr  4 15:34:09 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 21:34:09 +0200
Subject: setup distributed computing for two computer only
In-Reply-To: <1112642873.737256.186470@z14g2000cwz.googlegroups.com>
References: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>
	<42518a67$0$136$e4fe514c@news.xs4all.nl>
	<1112642873.737256.186470@z14g2000cwz.googlegroups.com>
Message-ID: <200504042134.12825.modelnine@ceosg.de>

Am Montag, 4. April 2005 21:27 schrieb ajikoe at gmail.com:
> <snip>

Google for:

Python Remote Objects

or

Python XMLRPC

-- 
--- Heiko.
listening to: Nine Inch Nails - The Downward Spiral
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From jimmy at retzlaff.com  Tue Apr 19 15:26:34 2005
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Tue, 19 Apr 2005 12:26:34 -0700
Subject: MessageBox ONOK?
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F380BAC@MAYOR.retzlaff.com>

Ali wrote:
> How do i connect the onOK of a win32ui MessageBox with the Ok button
so
> that I get to know when the user clicks the Ok button?

win32ui.MessageBox returns the ID of the button that was clicked to
dismiss the message box. There are constants in win32con you can use to
compare to that ID. An example:

>>> import win32con
>>> import win32ui
>>> buttonID = win32ui.MessageBox('Hello World')
>>> if buttonID == win32con.IDOK:
... 	print 'OK pressed'
... else:
... 	print 'OK not pressed'
... 	
OK pressed

I clicked OK when the dialog appeared. There are also constants for
IDCANCEL, IDYES, IDNO, etc. which can be useful if you are using other
buttons (e.g., win32ui.MessageBox('Do it?', None, win32con.MB_YESNO)).

Jimmy


From cjbottaro at alumni.cs.utexas.edu  Fri Apr  8 17:37:43 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Fri, 08 Apr 2005 16:37:43 -0500
Subject: base64 interoperability (solved)
References: <d36j9a$b23$1@sea.gmane.org> <d36oad$sfa$1@sea.gmane.org>
	<d36s7q$esa$1@sea.gmane.org>
Message-ID: <d36tdi$ar4$1@sea.gmane.org>

Christopher J. Bottaro wrote:

> <posted & mailed>
> 
> Fredrik Lundh wrote:
> 
>> Christopher J. Bottaro wrote:
>>> Python's base64 module encodes and decodes differently than PHP's.
>> 
>> really?
> 
> Yeah, weird, huh?  Actually the problem is that Python puts newlines at
> every 76th char.  How do I stop Python from doing that?  I just want
> everyone on one line.
> 
>>> Python's docs says that it ahere's to RFC1521 (sept 1993), while PHP's
>>> adheres
>>> to RFC2045 (nov 1996).  Is there any Python module that uses the new
>>> standard? Why is Python using the old standard anyways?
>> 
>> have you checked this, or are you just assuming that RFC1521 and RFC2045
>> contains different BASE64 definitions?
> 
> I was just assuming...=)
> 
>> (if you look at the standards,
>> you'll find
>> that they're about MIME, not BASE64 itself.  as far as I know, BASE64
>> hasn't changed a bit since it was first defined back in RFC1113).
>> 
>> </F>
> 
> -- C

Apparently the base64 module shoves newlines in there so the base64 encoded
message looks cool in email messages.  The binascii module will convert
stuff to base64 without putting those newlines in there.  Bah, why are
there two separate modules?  Confused me...=P



From peter at engcorp.com  Sat Apr  2 10:21:30 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 02 Apr 2005 10:21:30 -0500
Subject: Module subprocess: How to "communicate" more than once?
In-Reply-To: <1eOdnVIK972XbdDfRVn-og@comcast.com>
References: <1eOdnVIK972XbdDfRVn-og@comcast.com>
Message-ID: <6I-dnbhiIZI0JdPfRVn-hA@powergate.ca>

Edward C. Jones wrote:
> I have a program named "octave" (a Matlab clone). It runs in a terminal, 
> types a prompt and waits for the user to type something. If I try
> 
> # Run octave.
> oct = subprocess.Popen("octave", stdin=subprocess.PIPE)
> 
> # Run an octave called "startup".
> oct.communicate("startup")
> 
> # Change directory inside octave.
> oct.communicate("cd /home/path/to/my/dir")
> 
> I get:
> ValueError: I/O operation on closed file

As defined in the docs.  You can't use communicate()
for what you're trying to do.

> How do I set up a subprocess so I can send it a command and get the 
> answer, then send it another command and get an answer, etc.?

communicate is not the only way of communicating... use
the stdin/stdout handles that are provided.  You can
very likely find examples of usage in the list archives.

-Peter


From richardblackwood at cloudthunder.com  Sun Apr 24 00:11:07 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 00:11:07 -0400
Subject: Variables
In-Reply-To: <86u0lwrfbw.fsf@guru.mired.org>
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>
	<86u0lwrfbw.fsf@guru.mired.org>
Message-ID: <426B1C5B.70809@cloudthunder.com>

Mike Meyer wrote:

>Richard Blackwood <richardblackwood at cloudthunder.com> writes:
>
>  
>
>>Robert Kern wrote:
>>    
>>
>>>Richard Blackwood wrote:
>>>      
>>>
>>>>To All:
>>>>
>>>>   Folks, I need your help. I have a friend who claims that if I write:
>>>>
>>>>foo = 5
>>>>
>>>>then foo is NOT a variable, necessarily. If you guys can define for
>>>>me what a variable is and what qualifications you have to back you,
>>>>I can pass this along to, hopefully, convince him that foo is
>>>>indeed a variable.
>>>>        
>>>>
>>>None of us can do that unless you tell us what he thinks the word
>>>"variable" means. The terminology is a bit fluid. I suspect that
>>>your friend applying a somewhat restricted notion of "variable" that
>>>coincides with the behavior of variables in some other language.
>>>
>>>      
>>>
>>Indeed, this language is math. My friend says that foo is a constant
>>and necessarily not a variable. If I had written foo = raw_input(), he
>>would say that foo is a variable. Which is perfectly fine except that
>>he insists that since programming came from math, the concept of
>>variable is necessarily the identical. This can not be true. For
>>example, I may define foo as being a dictionary, but I can not do this
>>within math because there is no concept of dictionaries within
>>mathematics; yet foo is a variable, a name bound to a value which can
>>change.
>>    
>>
>
>Wrong on two counts.
>
>First, new disciplines often redefine words to mean something
>different than the disciplines they were derived from. Variable is a
>good example of that. In math, a variable is a placeholder in an (a
>system of) equation(s), and will have associated with it a (possibly
>empty) set of values that satisfy the equation(s). 
>
Not merely a placeholder, right? A variable in math is a 'placeholder' 
for a dynamic value, one which can or does change. If one can graph the 
movement (change) of foo, foo is a variable within that scope. For example:

foo = 5
foo = 6

I can graph foo's movement/change. It can thus be considered a variable 
within mathematics. If I write:

foo = 5

I can graph this but it will merely be a static point, a constant. 
Constants are not variables because they do not change, they do not 
"vary" in content.

>In programming, a
>variable holds a value of some kind. As you point out, the value may
>be complicated, in that it holds one or more objects.
>  
>
Indeed.

>In math, if you say "foo = 5", foo is a variable, with a single value
>(5) that satisfies the equation. In Python, if you say "foo = 5", foo
>is a variable, that currently references the value 5.
>  
>
He would argue strongly against your notion of variable. In the 
statement "foo = 5", foo is constant. He would thus argue that foo is a 
constant and not a variable (regardless of whether you change foo's 
value in subsequent statements).

>...
>
>        <mike
>  
>



From mahs at telcopartners.com  Mon Apr 11 15:18:13 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 11 Apr 2005 12:18:13 -0700
Subject: Creating a new instance of a class by what is sent in?
In-Reply-To: <kpGdnReVk_9eVcffRVn-vg@comcast.com>
References: <1113244930.403334.66150@z14g2000cwz.googlegroups.com>
	<kpGdnReVk_9eVcffRVn-vg@comcast.com>
Message-ID: <d3eibd$dil$1@sea.gmane.org>

Steven Bethard wrote:
  > It looks like you want to create a new _instance_ of the same type as an
> _instance_ passed in to a function.  If this is correct, you can do this 
> by:
...
> If you need to support old-style classes, replace type(obj) with 
> obj.__class__.
> 
You can use obj.__class__ for both old and new-style classes, so it seems to be 
the safer choice.

Note, that there will be some objects that can't be cloned this way - ('None' 
springs to mind), so you may need to trap TypeError when you call obj.__class__

Michael



From jstroud at mbi.ucla.edu  Wed Apr 27 14:04:49 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 27 Apr 2005 11:04:49 -0700
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
Message-ID: <200504271104.49307.jstroud@mbi.ucla.edu>

I think if you work backwards, it comes out:

a = ['bob', 'greg', 'cindy', 'alice']
b = ['fred',barney','betty','wilma','pebbles','bambam']
c = ['jed', 'granny', 'jethro', 'ellie-mae']
d = ['bob','carol','ted','alice']

e = [a,b,c,d]

for ary in e:
  print ary

e.sort(lambda x,y:cmp(x[1],y[1]))

for ary in e:
  print ary

e.sort(lambda x,y:cmp(x[0],y[0]))

for ary in e:
  print ary

James

On Wednesday 27 April 2005 10:34 am, so sayeth googleboy:
> I didn't think this would be as difficult as it now seems to me.
>
> I am reading in a csv file that documents a bunch of different info on
> about 200 books, such as title, author, publisher, isbn, date and
> several other bits of info too.
>
> I can do a simple sort over the first field (title as it turns out),
> and that is fine as far as it gets:
>
>
> import string
>
> bookData = open(r'D:\path\to\books.csv', 'r')
> sBookData = bookData.read()
> lBooks = string.split(sBookData, '\n')
>
> lBooks.sort()
> sorted = string.join(lBooks, '\n')
> output = open(r'D:\path\to\output.csv', 'w')
> output.close()
>
>
> I really want to be able to sort the list of books based on other
> criterium, and even multiple criteria (such as by author, and then by
> date.)
>
> I am using python 2.4 and have found this site:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305304
>
> and so I tried doing things like
>
> >>>lBooks.sort(cmp=cmp5)
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> NameError: name 'cmp5' is not defined
>
> (I was hoping that cmp5 meant it would use the 5th item in the lists to
> sort across)
>
> >>> lBooks.sort(key=lambda i:i[4])
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "<interactive input>", line 1, in <lambda>
> IndexError: string index out of range
>
>
> (I was hoping for similar things)
>
>
> would you be so kind as to point me in the right direction?
>
> THanks!
>
> googleboy

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

http://www.jamesstroud.com/


From http  Tue Apr 19 23:49:56 2005
From: http (Paul Rubin)
Date: 19 Apr 2005 20:49:56 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
Message-ID: <7xekd66ra3.fsf@ruckus.brouhaha.com>

Dumb question from a Windows ignoramus:

I find myself needing to write a Python app (call it myapp.py) that
uses tkinter, which as it happens has to be used under (ugh) Windows.
That's Windows XP if it makes any difference.

I put a shortcut to myapp.py on the desktop and it shows up as a
little green snake icon, which is really cool and Pythonic.  When I
double click the icon, the app launches just fine and the tkinter
interface does its thing.  But Windows also launches a DOS box that
just sits on the screen uselessly.  It's potentially useful in that
"print" statements in the Python app can show messages on the DOS box,
but I figure this is a graphical app so I don't plan to show messages
that way.  Also, it happens I often want to run lots of instances of
the app simultaneously, and I want to launch them all by double
clicking the icon.  That means the whole screen is cluttered with DOS
boxes all over the place.  Of course I can minimize them by clicking
the little underscore in the corner of each one, but that really takes
away from the coolness of it all.

Question: is there any simple way to arrange to launch the app from
the desktop, without also launching a DOS box?  By simple I mean
without having to mess with some complex packaging/installation system
(McMillan installer?) every time I want to modify the app, which
during development means a few hundred times a day.  I have no desire
at all to conceal the source code from the user or anything like that
either.

Thanks.


From bearophileHUGS at lycos.com  Fri Apr  1 06:19:35 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Apr 2005 03:19:35 -0800
Subject: unittest vs py.test?
In-Reply-To: <114pqf31isr8k4d@news.supernews.com>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
Message-ID: <1112354375.091279.246720@z14g2000cwz.googlegroups.com>

Nigel Rowe>Have you seen Grig Gheorghiu's 3 part comparison of
unittest, and py.test?<

Very interesting articles, thank you. Testing seems something still in
quick development.

For small functions the doctests are useful, but py.test has some
advantages. Probably something even better that py.test can be
designed, taking some ideas from the doctests, or vice versa :-]
In py.test I see a couple of features useful for the Python language
too:

The raises:
py.test.raises(NameError, "self.alist.sort(int_compare)")
py.test.raises(ValueError, self.alist.remove, 6)
(A try can probably do something similar)

And the improved error messages:
"When it encounters a failed assertion, py.test prints the lines [3-4
lines?] in the method containing the assertion, up to and including the
failure. It also prints the actual and the expected values involved in
the failed assertion."

http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-3-pytest-tool.html

Such things can help avoid (just for simple situations/functions!)
testing frameworks in the first place, so you can use just the normal
Python code to test other code.

Bye,
Bearophile



From ajikoe at gmail.com  Sun Apr 24 11:38:57 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 24 Apr 2005 08:38:57 -0700
Subject: Is this a bug?
In-Reply-To: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
Message-ID: <1114357137.234806.141920@z14g2000cwz.googlegroups.com>

when you use a = a + 'world'  python sees it as an error because of
different type.

But when you use a += 'world'
python will change the right into list (because a is a list). So when
you're code become:
a += 'world' # a += list('world')

It really helpfull if you stick to use append instead of += when you
operate list

Pujo



From mage at mage.hu  Sun Apr 24 12:24:24 2005
From: mage at mage.hu (Mage)
Date: Sun, 24 Apr 2005 18:24:24 +0200
Subject: postgresql modules and performance
In-Reply-To: <3d1pbpF6rmccaU1@individual.net>
References: <mailman.2393.1114344513.1799.python-list@python.org>
	<3d1pbpF6rmccaU1@individual.net>
Message-ID: <426BC838.5030204@mage.hu>

Reinhold Birkenfeld wrote:

>
>Have you tried psycopg?
>  
>
Thank you. It did the fetchall()  in 11 secs and 13 secs with dictionary
creating. It's the fastest so far.

       Mage



From vm at klankschap.nl  Sat Apr 23 05:53:36 2005
From: vm at klankschap.nl (Floris van Manen)
Date: Sat, 23 Apr 2005 11:53:36 +0200
Subject: embedding python onto a fox-board
Message-ID: <426a1b1f$0$98488$e4fe514c@news.xs4all.nl>

Is there anyone who already ported python onto a acme-systems linux 
fox-board?
http://www.acmesystems.it/





From ckwiguno at gmail.com  Sun Apr 24 14:49:47 2005
From: ckwiguno at gmail.com (Clara)
Date: 24 Apr 2005 11:49:47 -0700
Subject: opening new window in one window using Tkinter -- Help please
In-Reply-To: <mailman.2414.1114367330.1799.python-list@python.org>
References: <1114365774.690048.280150@l41g2000cwc.googlegroups.com>
	<mailman.2414.1114367330.1799.python-list@python.org>
Message-ID: <1114368587.303696.90130@l41g2000cwc.googlegroups.com>

Well, but where do I call withdraw?



From jecarty at NOSPAMsbcglobal.net  Wed Apr 13 21:25:02 2005
From: jecarty at NOSPAMsbcglobal.net (John E. Carty)
Date: Thu, 14 Apr 2005 01:25:02 GMT
Subject: .
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<ao9r511lsm27rbicdnkdpc2ufgrht920ap@4ax.com>
Message-ID: <ODj7e.988$zq4.793@newssvr11.news.prodigy.com>

Report spam to: abuse at newscene.com

<JUST ANOTHER SPAMMER!> wrote in message 
news:ao9r511lsm27rbicdnkdpc2ufgrht920ap at 4ax.com...
> Nuf said. 




From tim.peters at gmail.com  Fri Apr 22 09:51:54 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 22 Apr 2005 09:51:54 -0400
Subject: time.strftime in 2.4.1 claims data out of range when not
In-Reply-To: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
References: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
Message-ID: <1f7befae050422065176bc4d55@mail.gmail.com>

[Sheila King]
> I have a web app that has been running just fine for several months under
> Python 2.2.2.
>
> We are preparing to upgrade the server to run Python 2.4.1.
>
> However, part of my web app is throwing an error on this code (that has
> previously worked without exception):
>
> >>> time.strftime("%Y-%m-%d", (Y, M, D, 0,0,0,0,0,0))
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> ValueError: day of year out of range
> >>> Y
> 2005
> >>> M
> 5
> >>> D
> 15L
>
> I don't see what parts of the date that I have submitted to strftime are out
> of range?
>
> Also, the phrasing of the error message is a bit odd?
> "day of year out of range"

That was explained already, so I won't again.  The NEWS file for
Python 2.4a1 explains why:

"""
- time.strftime() now checks that the values in its time tuple argument
  are within the proper boundaries to prevent possible crashes from the
  platform's C library implementation of strftime().  Can possibly
  break code that uses values outside the range that didn't cause
  problems previously (such as sitting day of year to 0).  Fixes bug
  #897625.
"""

See the referenced bug report for examples of platforms whose
strftime()s crashed the app, or just returned utter gibberish, when
passed senseless values.  Python's strftime wrapper now verifies that
all passed-in values are in range, no longer trusting the platform C's
strftime() to do error-checking.


From apardon at forel.vub.ac.be  Tue Apr 12 04:51:31 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 12 Apr 2005 08:51:31 GMT
Subject: Python license (2.3)
Message-ID: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>

I have made a module derived from the Queue module deliverd
with python 2.3. I would like to make this module (called
tube) available for other people. However it is not clear
to me how I can do this in accordance with the python
license.

First of all it seems I have to make a sumary of how
my module differs from the original.

Second it seems I have to include the following in
my code:

  "Copyright (c) 2001, 2002 Python Software Foundation;
   All Rights Reserved"

Do I understand correctly?

Because I don't mind the first but I'm not so happy
with the second. Are there other things I have to
watch out for?

-- 
Antoon Pardon


From fredrik at pythonware.com  Sun Apr 24 14:38:04 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 20:38:04 +0200
Subject: filename used by shelve
References: <20050424180725.3658.6265.XPN@orion.homeinvalid>
Message-ID: <d4gooi$kpg$1@sea.gmane.org>

"Nemesis" <nemesis at nowhere.invalid> wrote:

> So the real filename may be different from the argument passed to
> "open". I have this problem, I want to delete (in some circustances) the
> file created by shelve.open, how can I know which is the name of this
> file (or files) ?

if you put the shelve in a subdirectory, and nuke the entire directory when
done, you don't have to know the names.

    dbfile = "mydatabase"
    if not os.path.isdir(dbfile):
        os.makedirs(dbfile)
    db = shelve.open(os.path.join(dbfile, "data"), ...)

    ...

    db.close()
    del db

    ...

    shutil.rmtree(dbfile)

</F>





From claird at lairds.us  Thu Apr 28 15:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Thu, 28 Apr 2005 19:08:03 GMT
Subject: anonymous functions/expressions without lambda?
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<aeGdnR0QWZ8XYu3fRVn-vg@powergate.ca>
Message-ID: <02o7k2-ka5.ln1@lairds.us>

In article <aeGdnR0QWZ8XYu3fRVn-vg at powergate.ca>,
Peter Hansen  <peter at engcorp.com> wrote:
>Paul Miller wrote:
>> For example, let's say I have a function which binds a key to a function 
>> call. I want to do something "simple" in this function call, and I have 
>> a lot of bindings, so I don't want to have a ton of tiny little 
>> functions scattered around:
>> 
>>     def setVarTo1():
>>         foo.var = 1
>>     def setVarTo2():
>>         foo.var = 2
>> 
>>     bind('a', setVarTo1)
>>     bind('b', setVarTo2)
>> 
>> Instead, I'd like to do something like this:
>> 
>>     bind('a', foo.var = 1)
>>     bind('b', foo.var = 2)
>> 
>> What's the recommended way to do something like this?
>
>This meets your requirements as stated:
>
>def temp():
>    foo.var = 1
>
>bind('a', temp)
>
>def temp():
>    foo.var = 2
>
>bind('b', temp)
>
>del temp
>
>
>-Peter

Ewww!  *When* is lambda going bye-bye?  I apparently
haven't been paying close enough attention.  Among other
considerations, I still instruct people to use lambda for
plenty of specific cases.


From swaroopch at gmail.com  Mon Apr  4 13:28:27 2005
From: swaroopch at gmail.com (Swaroop C H)
Date: Mon, 4 Apr 2005 22:58:27 +0530
Subject: re module non-greedy matches broken
In-Reply-To: <d2rqa2$5tk$1@sea.gmane.org>
References: <115040egk00tf9d@corp.supernews.com>
	<20611953.SkRsez8GTE@news.perlig.de>
	<11516i9g0usp235@corp.supernews.com> <d2qnf5$a1b$1@news.web.de>
	<1152q99c7pjjl04@corp.supernews.com> <d2rqa2$5tk$1@sea.gmane.org>
Message-ID: <351e887105040410282204d63c@mail.gmail.com>

On Apr 4, 2005 10:06 PM, Terry Reedy <tjreedy at udel.edu> wrote:
> > what book or books on regexes
> A standard is Mastering Regular Expressions, 2nd ed, by xxx (sorry, forget)

Mastering Regular Expressions, by Jeffrey Friedl
See http://www.regex.info/

Regards,
-- 
Swaroop C H
Blog: http://www.swaroopch.info
Book: http://www.byteofpython.info


From john at castleamber.com  Mon Apr 25 16:41:21 2005
From: john at castleamber.com (John Bokma)
Date: 25 Apr 2005 20:41:21 GMT
Subject: Python or PHP?
References: <Xns96439421AE239castleamber@130.133.1.4>
	<mailman.2487.1114459699.1799.python-list@python.org>
Message-ID: <Xns96439F9121A73castleamber@130.133.1.4>

Steve Holden wrote:

> John Bokma wrote:
>> Alan Little wrote:
>> 
>> 
>>>Steve Holden <steve at holdenweb.com> wrote:
>>>
>>>
>>>>Your statement then becomes
>>>>
>>>>select * from foo where bar=1; drop table foo
>>>>
>>>>which is clearly not such a good idea.
>>>
>>>I'm sure Steve is very well aware of this and was just providing a
>>>simple and obvious example, nevertheless it might be worth pointing
>>>out that anyody who connects their web application to their database
>>>as a user that has DROP TABLE privileges, would clearly be in need of
>>>a lot more help on basic security concepts than just advice on
>>>choosing a programming language.
>> 
>> 
>> True. But how does it stop someone who uses inserts? (I exclude the
>> case inserts are not needed).
>> 
>> 
>>>This goes back to the point somebody made earlier on in the thread -
>>>many web applications can be implemented as fairly simple wrappers
>>>around properly designed databases. "Properly designed" includes
>>>giving some thought to table ownership and privileges.
>> 
>> 
>> One should stop SQL injection always, no matter if the database takes
>> care of it or not. There is no excuse (like, yeah, but I set up the
>> privileges right) for allowing SQL injection, ever.
>> 
> Correct. If a thing can't go wrong, it won't.
> 
> In security several levels of defense are better than just one, so 
> database authorization and SQL injection removal should be considered 
> complimentary techniques of a "belt and braces" (US: "belt and 
> suspenders") approach.

Yup, would say different, I normally set up the privileges before I even 
start to program.

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


From aahz at pythoncraft.com  Thu Apr  7 15:03:56 2005
From: aahz at pythoncraft.com (Aahz)
Date: 7 Apr 2005 15:03:56 -0400
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1429.1112794393.1799.python-list@python.org>
	<d33ij3$9jj$1@panix2.panix.com>
	<mailman.1489.1112889853.1799.python-list@python.org>
Message-ID: <d3406s$dh0$1@panix2.panix.com>

In article <mailman.1489.1112889853.1799.python-list at python.org>,
=?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
>[Aahz]
>>
>> I'll agree that Python currently has many examples of more than one
>> way to do things (and even Python 3.0 won't remove every example
>> [...]). But I won't agree that Only One Way has been abandoned as a
>> design principle.
>
>To summarize, instead of saying "Python has only one way to do it",
>rather say "Python will eventually have only one way to do it", and with
>such a wording, nobody will not be mislead.

Let's go back to the original comments, shall we?

    > [...] for Pythons ideal of having one canonical, explicit way to
    > program.

    No doubt it once was true, but I guess this ideal has been abandoned a
    few years ago.

    My honest feeling is that it would be a mis-representation of Python,
    assertng today that this is still one of the Python's ideals.

Your claim that the ideal has been abandoned is just plain wrong.  In
addition, nobody has ever said "Python has only one way to do it".  The
actual principle from ``import this`` is

    There should be one-- and preferably only one --obvious way to do it.

Some people have advocated that Python's motto should be "There's Only
One Way" as a counterpoint to Perl's TMTOWTDI -- but that's different
from the design principle.  Which I repeat has not been abandoned, but
should be understood to exist alongside eighteen other design principles
for Python.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From lbates at syscononline.com  Thu Apr 14 14:53:32 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 14 Apr 2005 13:53:32 -0500
Subject: Get the entire file in a variable - error
In-Reply-To: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
References: <1113489431.686307.31840@f14g2000cwb.googlegroups.com>
Message-ID: <vPmdnUOBSeW5IcPfRVn-1Q@comcast.com>

In the future it REALLY helps if you post the code that
you used to open and read the file.  Otherwise we have
to "guess" what you may of done.

That said, I'll try to guess:

1) Your code shows that you instantiate GzipFile class with
mode "w".  I don't know what your data looks like but
normally you would want to use "wb" to handle binary
data.

2) You also need to do the same thing when you try to read
the file:

fp=file(filename, 'rb')

When you don't the first read will read until it encounters
binary bytest that look like a EOF and quit.  When you open
with "b" mode it reads the number of bytes that the
filesytem has stored for the file.

Hope info helps.

Larry Bates


martijn at gamecreators.nl wrote:
> H!
> 
> I'm using a database and now I want to compress a file and put it into
> the database.
> 
> So I'm using gzip because php can open the gzip file's.
> The only problem is saving the file into the database.
> 
> The function below does this:
> - gzip the file [oke]
> - get all the bytes with tst.getvalue() [error]
> I only get the first line.
> 
> I have the same problem when I try it with file.open(), .read().
> 
> "how to get all the binary data in a variable to put that in a database
> LONG field?"
> 
> Thank's
> 
> def compressFILE(sid,filedata):
>     tst = StringIO.StringIO()
> 
>     #tmp
>     zip = gzip.GzipFile(str(sid)+'.gz','w',5,tst)
>     zip.write(filedata)
> 
>     #put every byte in a database
>     print tst.getvalue()
> 
>     zip.close()
>     tst.close()
> 
>     return
> 


From mwh at python.net  Tue Apr  5 10:02:49 2005
From: mwh at python.net (Michael Hudson)
Date: Tue, 5 Apr 2005 14:02:49 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <ixt3e.1907$7b.368@trndny01>
	<424e73a3.100782477@news.oz.net>
	<roy-9BA12E.08481802042005@reader1.panix.com>
Message-ID: <m3r7hp5njr.fsf@pc150.maths.bris.ac.uk>

Roy Smith <roy at panix.com> writes:

> In article <424e73a3.100782477 at news.oz.net>, bokr at oz.net (Bengt Richter) 
> > Is there a package that is accessible without svn?
> 
> That seems to be its weak point right now.
> 
> Fortunately, you can get pre-built svn clients for many platforms 
> (http://subversion.tigris.org/project_packages.html#binary-packages), and 
> from there you just have to run a single command (svn get URL).

wget -r should work fine!

Cheers,
mwh

-- 
  All obscurity will buy you is time enough to contract venereal
  diseases.                                  -- Tim Peters, python-dev


From mwh at python.net  Tue Apr  5 10:08:58 2005
From: mwh at python.net (Michael Hudson)
Date: Tue, 5 Apr 2005 14:08:58 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
Message-ID: <m3mzsd5n9j.fsf@pc150.maths.bris.ac.uk>

Peter Hansen <peter at engcorp.com> writes:

> Raymond Hettinger wrote:
> > [Peter Hansen]
> > 
> >>This is pretty, but I *want* my tests to be contained
> >>in separate functions or methods.
> > In py.test, those would read:
> > def test1():
> >     assert a == b
> > def test2():
> >     raises(Error, func, args)
> > Enclosing classes are optional.
> 
> So basically py.test skips the import statement,
> near as I can tell, at the cost of requiring a
> utility to be installed in the PATH.
> 
> Where was all that weight that unittest supposedly
> has?

For PyPy we wanted to do some things that the designers of unittest
obviously hadn't expected[1], such as formatting tracebacks
differently.  This was pretty tedious to do[2], involving things like
accessing __variables, defining subclasses of certain classes,
defining subclasses of other classes so the previous subclasses would
actually get used, etc.  I've not programmed in Java, but I imagine
this is what it feels like all the time...

(Not to knock unittest too much, we did manage to get the
customizations we needed done, but it wasn't fun).

Cheers,
mwh

[1] this in itself is hardly a criticism: there are many special
    things about PyPy.
[2] *this* is the criticism.

-- 
  Well, you pretty much need Microsoft stuff to get misbehaviours
  bad enough to actually tear the time-space continuum.  Luckily 
  for you, MS Internet Explorer is available for Solaris.
                              -- Calle Dybedahl, alt.sysadmin.recovery


From Scott.Daniels at Acm.Org  Tue Apr  5 17:32:59 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 05 Apr 2005 14:32:59 -0700
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
Message-ID: <4252fec3@nntp0.pdx.net>

Ron_Adam wrote:
> What I was referring to is the case:
>     @decorator(x,y,z) 
> As being a decorator expression with more than one argument.  
But, we generally say this is a call to a function named decorator
that returns a decorator.  If you called it:
     @make_decorator(x,y)
     def .....
We'd be sure we were all on the same page.

How about this as an example:

     def tweakdoc(name):
         def decorator(function):
	    function.__doc__ = 'Tweak(%s) %r' % (name, function.__doc__)
	    return function
         return decorator

What is confusing us about what you write is that you are referring to
tweakdoc as a decorator, when it is a function returning a decorator.

> and not: 
>     @decorator(x)(y)

This is only prevented by syntax (probably a good idea, otherwise
we would see some very complicated expressions before function
declarations).

--Scott David Daniels
Scott.Daniels at Acm.Org


From Scott.Daniels at Acm.Org  Fri Apr  8 16:23:58 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 13:23:58 -0700
Subject: curious problem with large numbers - Due to subprocess
In-Reply-To: <mailman.1559.1112987745.1799.python-list@python.org>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>	<mailman.1517.1112938969.1799.python-list@python.org>	<4256a676@nntp0.pdx.net>	<4256b80b.34130777@news.oz.net>	<4256b774$1@nntp0.pdx.net>	<4256c65c$1@nntp0.pdx.net>
	<mailman.1559.1112987745.1799.python-list@python.org>
Message-ID: <4256e2ff$1@nntp0.pdx.net>

Michael Spencer wrote:
> Problem is associated with executing iteractive input in a subprocess.
> 
>  >python idle.py -n
> 
> IDLE 1.1      ==== No Subprocess ====
>  >>> 1e10000
> 1.#INF
>  >>>
> 
Really good find.
_very_ curious.  Perhaps moving the float causes the problem?
Where does the value get converted to text -- the subprocess or
the parent?

--Scott David Daniels
Scott.Daniels at Acm.Org


From deetsNOSPAM at web.de  Sat Apr 16 10:50:13 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 16 Apr 2005 16:50:13 +0200
Subject: trouble to print array contents using slice operator
References: <mailman.1999.1113661711.1799.python-list@python.org>
Message-ID: <d3r8n1$2lq$04$1@news.t-online.com>

praba kar wrote:

> Dear all,
> 
>    In Php array_slice function base
> we can print array contents as per our desire
> eg)
> 
> $a = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
> $arr = array_slice($a,10,10);
> 
> this function will print 11,12,13,14,15
> 
> But I try to print the same thing in python
> using slice operator
> 
> eg) print a[10:10]
> 
> This statement print [] empty array.
> 
> How I need to get my desired output like php
> array_slice function?

Slicing indices in python are [start:stop], not [start:lengh]. So use

print a[10:10+10]




-- 
Regards,

Diez B. Roggisch


From JUST  Wed Apr 13 19:15:06 2005
From: JUST (JUST)
Date: 13 Apr 2005 18:15:06 -0500
Subject: .
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
Message-ID: <ao9r511lsm27rbicdnkdpc2ufgrht920ap@4ax.com>

Nuf said.


From Scott.Daniels at Acm.Org  Fri Apr 15 15:07:44 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 15 Apr 2005 12:07:44 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <Xns9639A1F15A98Bduncanrcpcouk@127.0.0.1>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
	<Xns963892E01D954duncanrcpcouk@127.0.0.1>
	<1113573592.248241.38550@z14g2000cwz.googlegroups.com>
	<Xns9639A1F15A98Bduncanrcpcouk@127.0.0.1>
Message-ID: <42600b6f$1@nntp0.pdx.net>

Duncan Booth wrote:
> fred.dixon wrote:
> 
>>:) unit test is something on my to-learn list. seems involved and i
>>haven't seen any straight forward tutorials yet. as yet i still
>>consider myself a hobbyist  at best.
> 
> Hmm, I believe you are right. I can't see any straight-forward tutorials 
> which use Python. I found a tutorial at onlamp.com, but it doesn't seem to 
> me to explain TDD at all clearly.
> 

Here's a simple sketch of how to start:

Create a file named "test_prog.py" (where "prog.py" is the module you
are going to develop).  Then stick in the following as the initial
contents of the file (I'm over-indenting by four here):

     import unittest
     import prog   # this should be your module

     class TestCase(unittest.TestCase):
         def setUp(self):
             self.whatever = 'build commonly used data'
             # this picks up any setup common to any test case

         def test_first(self):
             '''Simplest functioning test use of our function'''
             self.assertEqual(42, prog.magic(1)) # use a better test

         def test_second(self):
             '''magic should fail with an appropriate exceptions'''
             self.assertRaises(TypeError, prog.magic, 'q')


     if __name__ == '__main__':
         unittest.main()


More details can be found in the unittest documentation, but this may
be enough to get you started testing.  Essentially, new test cases
are added as methods on your class(es).  setUp is called before each
test case, so saving a data structure as self.something eliminates
boilerplate at the top of every test; if you don't need anything in
common, don't bother defining setUp.  The test methods should be
named "test_..."; the name is how unittest know which are test cases.
If you have a more elaborate setup for a bunch of tests, create a new
class as a subclass of unittest.TestCase (or eventually inherriting
from it).  unittest uses all classes defined in the test_prog module
that are subclasses of unittest.TestCase.

To run all of these the tests, at a command prompt type:
     python test_prog.py

To run them all and see which are being run,
     python test_prog.py -v

You can run individual tests with:
     python test_prog.py TestCase.test_second

TestCase here is the name of the class you chose to hold a block of test
cases.  You can run all of the tests under a single class as:
     python test_prog.py TestCase.test_second

--Scott David Daniels
Scott.Daniels at Acm.Org


From kbk at shore.net  Wed Apr  6 22:12:08 2005
From: kbk at shore.net (Kurt B. Kaiser)
Date: Wed, 6 Apr 2005 22:12:08 -0400 (EDT)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200504070212.j372C8Nw030750@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  308 open (+11) /  2819 closed ( +7) /  3127 total (+18)
Bugs    :  882 open (+11) /  4913 closed (+13) /  5795 total (+24)
RFE     :  176 open ( +1) /   151 closed ( +1) /   327 total ( +2)

New / Reopened Patches
______________________

improvement of the script adaptation for the win32 platform  (2005-03-30)
       http://python.org/sf/1173134  opened by  Vivian De Smedt

unicodedata docstrings  (2005-03-30)
CLOSED http://python.org/sf/1173245  opened by  Jeremy Yallop

__slots__ for subclasses of variable length types  (2005-03-30)
       http://python.org/sf/1173475  opened by  Michael Hudson

Python crashes in pyexpat.c if malformed XML is parsed  (2005-03-31)
       http://python.org/sf/1173998  opened by  pdecat

hierarchical regular expression  (2005-04-01)
CLOSED http://python.org/sf/1174589  opened by  Chris Ottrey

site enhancements  (2005-04-01)
       http://python.org/sf/1174614  opened by  Bob Ippolito

Export more libreadline API functions  (2005-04-01)
       http://python.org/sf/1175004  opened by  Bruce Edge

Export more libreadline API functions  (2005-04-01)
CLOSED http://python.org/sf/1175048  opened by  Bruce Edge

Patch for whitespace enforcement  (2005-04-01)
CLOSED http://python.org/sf/1175070  opened by  Guido van Rossum

Allow weak referencing of classic classes  (2005-04-03)
       http://python.org/sf/1175850  opened by  Greg Chapman

threading.Condition.wait() return value indicates timeout  (2005-04-03)
       http://python.org/sf/1175933  opened by  Martin Blais

Make subprocess.Popen support file-like objects (win)  (2005-04-03)
       http://python.org/sf/1175984  opened by  Nicolas Fleury

Implemented new 'class foo():pass' syntax  (2005-04-03)
       http://python.org/sf/1176019  opened by  logistix

locale._build_localename treatment for utf8  (2005-04-05)
       http://python.org/sf/1176504  opened by  Hye-Shik Chang

Clarify unicode.(en|de)code.() docstrings  (2005-04-04)
CLOSED http://python.org/sf/1176578  opened by  Brett Cannon

UTF-8-Sig codec  (2005-04-05)
       http://python.org/sf/1177307  opened by  Walter D?rwald

Complex commented  (2005-04-06)
       http://python.org/sf/1177597  opened by  engelbert gruber

explicit sign variable for longs  (2005-04-06)
       http://python.org/sf/1177779  opened by  Michael Hudson

Patches Closed
______________

unicodedata docstrings  (2005-03-30)
       http://python.org/sf/1173245  closed by  perky

hierarchical regular expression  (2005-04-01)
       http://python.org/sf/1174589  closed by  loewis

Export more libreadline API functions  (2005-04-01)
       http://python.org/sf/1175048  closed by  loewis

Patch for whitespace enforcement  (2005-04-01)
       http://python.org/sf/1175070  closed by  gvanrossum

ast for decorators  (2005-03-21)
       http://python.org/sf/1167709  closed by  nascheme

[ast branch] unicode literal fixes  (2005-03-25)
       http://python.org/sf/1170272  closed by  nascheme

Clarify unicode.(en|de)code.() docstrings  (2005-04-04)
       http://python.org/sf/1176578  closed by  bcannon

New / Reopened Bugs
___________________

very minor doc bug in 'listsort.txt'  (2005-03-30)
CLOSED http://python.org/sf/1173407  opened by  gyrof

quit should quit  (2005-03-30)
CLOSED http://python.org/sf/1173637  opened by  Matt Chaput

multiple broken links in profiler docs  (2005-03-30)
       http://python.org/sf/1173773  opened by  Ilya Sandler

Reading /dev/zero causes SystemError  (2005-04-01)
       http://python.org/sf/1174606  opened by  Adam Olsen

subclassing ModuleType and another built-in type  (2005-04-01)
       http://python.org/sf/1174712  opened by  Armin Rigo

PYTHONPATH is not working  (2005-04-01)
CLOSED http://python.org/sf/1174795  opened by  Alexander Belchenko

property example code error  (2005-04-01)
       http://python.org/sf/1175022  opened by  John Ridley

import statement likely to crash if module launches threads  (2005-04-01)
       http://python.org/sf/1175194  opened by  Jeff Stearns

python hangs if import statement launches threads  (2005-04-01)
CLOSED http://python.org/sf/1175202  opened by  Jeff Stearns

codecs.readline sometimes removes newline chars  (2005-04-02)
CLOSED http://python.org/sf/1175396  opened by  Irmen de Jong

poorly named variable in urllib2.py  (2005-04-03)
       http://python.org/sf/1175848  opened by  Roy Smith

StringIO and cStringIO don't provide 'name' attribute  (2005-04-03)
       http://python.org/sf/1175967  opened by  logistix

compiler module didn't get updated for "class foo():pass"  (2005-04-03)
       http://python.org/sf/1176012  opened by  logistix

Python garbage collector isn't detecting deadlocks  (2005-04-04)
CLOSED http://python.org/sf/1176467  opened by  Nathan Marushak

Readline segfault  (2005-04-05)
       http://python.org/sf/1176893  opened by  Walter D?rwald

[PyPI] Password reset problem.  (2005-04-05)
CLOSED http://python.org/sf/1177077  opened by  Darek Suchojad

random.py/os.urandom robustness  (2005-04-05)
       http://python.org/sf/1177468  opened by  Fazal Majid

error locale.getlocale() with LANGUAGE=eu_ES  (2005-04-06)
CLOSED http://python.org/sf/1177674  opened by  Zunbeltz Izaola

Exec Inside A Function  (2005-04-06)
       http://python.org/sf/1177811  opened by  Andrew Wilkinson

(?(id)yes|no) only works when referencing the first group  (2005-04-06)
       http://python.org/sf/1177831  opened by  Andr? Malo

Iterator on Fileobject gives no MemoryError  (2005-04-06)
       http://python.org/sf/1177964  opened by  Folke Lemaitre

cgitb.py support for frozen images  (2005-04-06)
       http://python.org/sf/1178136  opened by  Barry Alan Scott

urllib.py overwrite HTTPError code with 200  (2005-04-06)
       http://python.org/sf/1178141  opened by  Barry Alan Scott

urllib2.py assumes 206 is an error  (2005-04-06)
       http://python.org/sf/1178145  opened by  Barry Alan Scott

cgitb.py report wrong line number  (2005-04-07)
       http://python.org/sf/1178148  opened by  Barry Alan Scott

Bugs Closed
___________

The readline module can cause python to segfault  (2005-03-19)
       http://python.org/sf/1166660  closed by  mwh

very minor doc bug in 'listsort.txt'  (2005-03-30)
       http://python.org/sf/1173407  closed by  rhettinger

Property access with decorator makes interpreter crash  (2005-03-17)
       http://python.org/sf/1165306  closed by  mwh

"cmp" should be "key" in sort doc  (2005-03-29)
       http://python.org/sf/1172581  closed by  rhettinger

why should URL be required for all packages  (2005-03-25)
       http://python.org/sf/1170424  closed by  loewis

Possible windows+python bug  (2005-03-22)
       http://python.org/sf/1168427  closed by  holo9

quit should quit  (2005-03-30)
       http://python.org/sf/1173637  closed by  loewis

PYTHONPATH is not working  (2005-04-01)
       http://python.org/sf/1174795  closed by  bcannon

python hangs if import statement launches threads  (2005-04-02)
       http://python.org/sf/1175202  closed by  loewis

codecs.readline sometimes removes newline chars  (2005-04-02)
       http://python.org/sf/1175396  closed by  doerwalter

Python garbage collector isn't detecting deadlocks  (2005-04-04)
       http://python.org/sf/1176467  closed by  nascheme

[PyPI] Password reset problem.  (2005-04-05)
       http://python.org/sf/1177077  closed by  jafo

Minor error in section 3.2  (2005-03-11)
       http://python.org/sf/1161595  closed by  jyby

error locale.getlocale() with LANGUAGE=eu_ES  (2005-04-06)
       http://python.org/sf/1177674  closed by  perky

New / Reopened RFE
__________________

add "reload" function  (2005-04-03)
       http://python.org/sf/1175686  opened by  paul rubin

Add a settimeout to ftplib.FTP object  (2005-04-06)
       http://python.org/sf/1177998  opened by  Juan Antonio Vali?o Garc?a

RFE Closed
__________

file() on a file  (2005-03-03)
       http://python.org/sf/1155485  closed by  loewis



From nospam at here.com  Fri Apr  8 08:23:42 2005
From: nospam at here.com (Matt Feinstein)
Date: Fri, 08 Apr 2005 08:23:42 -0400
Subject: Matplotlib question-- Numeric or numarray?
Message-ID: <ujtc519cgj0iltaamqqihpghckektkrjf3@4ax.com>

I'm working my way through the matplotlib documentation & there's a
point that's ambiguous-- the pdf file (dated Mar. 1, 2005) warns of
dire consequences if I use the 'wrong' array package-- e.g., put
numarray in the .matlabrc file if the compile-time package is Numeric.
But there's only one current, unlabeled, windows installer and there
seems to have been a change, some time back before version 0.7, in how
this question is dealt with. Can someone clarify?
thnksndvnc

Matt Feinstein

--
There is no virtue in believing something that can be proved to be true.


From mark.hellewell at gmail.com  Thu Apr 14 11:55:21 2005
From: mark.hellewell at gmail.com (mark hellewell)
Date: Thu, 14 Apr 2005 16:55:21 +0100
Subject: A little request about spam
In-Reply-To: <c1169f9605041407027a785a4f@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<c1169f9605041407027a785a4f@mail.gmail.com>
Message-ID: <d3fd6366050414085511cc9c31@mail.gmail.com>

On 4/14/05, Steven Cummings <estebistec at gmail.com> wrote:
> For what it's worth I filed a gmail issue over it a few days after I noticed
> it. I guess more of you could do so indicating the severity of the issue to
> the gmail developers. And I thought I was the only one...!

I've now done the same. Let's hope they can do something about it,
it is a little annoying!

mark

>  /S


From tpherndon at gmail.com  Mon Apr 18 13:08:27 2005
From: tpherndon at gmail.com (Peter Herndon)
Date: Mon, 18 Apr 2005 13:08:27 -0400
Subject: MS SQL Server/ODBC package for Python
In-Reply-To: <4263E438.90707@egenix.com>
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>
	<42603197.9090002@egenix.com>
	<mailman.1988.1113604089.1799.python-list@python.org>
	<4260ff70$0$7511$79c14f64@nan-newsreader-07.noos.net>
	<1113779479.783895.283580@g14g2000cwa.googlegroups.com>
	<4263E438.90707@egenix.com>
Message-ID: <3a48a11f0504181008286bf433@mail.gmail.com>

> > Next I modified the benchmark to reflect my particular circumstances
> > more accurately (?Maybe?  Comments invited).  I changed the query to
> > one of the queries in regular use in my application.  This query
> > selects 26 columns from 3 joined tables, with a where clause "where
> > f476 = ?", and I provide the missing value as a tuple in the execute
> > statement.  Note that, as I mentioned in my reply to M-A, the f476
> > field is not indexed, and is a long varchar.  Again, the system is
> > bought, so I have no control over the schema. ;)
> >
> > The other change I made was to reduce the number of iterations from 100
> > to 10.  Since there are 128000 records in the main table, the wait for
> > 100 iterations was too long for my patience.  Under these
> > circumstances, mx.ODBC's numbers are 188.49 seconds and 377.56 seconds
> > respectively, and adodbapi's times are 111.15 seconds and 223.55
> > seconds respectively.
> 
> Just curious: are you timing just the time it takes to
> complete the .execute() or do you also fetch the complete
> result or only part of it ?
> 

I have included the .fetchall() in the loop, yes.  The only other
change I made to the benchmark is to use ODBC.Windows.DriverConnect
rather than .Connect, as that's what I'd used before in my
application.  Is there a difference between the two, other than the
argument syntax?

> The mxODBC 2.0 release fetches this number after every .execute().
> If adodbapi avoids this (which we'll also integrate into mxODBC 2.1),
> then this would explain the differences you see.
> 

I look forward to retesting with 2.1 -- I'm curious to see what
differences arise.

> Another reason could indeed be related to the longvarchar
> field: these fields are fetched in multiple chunks if the
> ODBC driver doesn't provide proper size information - each
> of these chunks will require a network access which slows
> down the data fetching.

The datum in the field is uniformly short, 8 characters or less.  It's
actually our internal identifier.  Again, I'd use a varchar and index
the field if I had control over the schema.  However, the small size
of the datum argues against multiple chunks, unless the default chunk
size is really small.

> 
> Since mxODBC supports Unicode, but defaults to returning
> 8-bit strings, it is also possible that your longvarchar
> column is sent as Unicode and has to be converted to
> an 8-bit string first. Thus, allowing mxODBC to return Unicode
> could make a difference as well (see the docs on how this is
> done).

I'll take a look into this, as I have a vague memory of adodbapi
returning Unicode by default.

> Note that it often also pay off checking the ODBC driver
> settings, esp. if you have a networked setup - ODBC drivers
> often pre-fetch result sets and changing the defaults they
> use for this can make a huge difference in response times.
> 
> Unfortunately, mxODBC doesn't have control over these
> settings and there's no standard for them, so you'll
> have to check the ODBC driver documentation for details
> on the best settings can be found and set.

I'll have to dig into this.  There don't seem to be too many directly
available settings in ODBC Administrator, but there seem to be some
spots for inserting settings directly into a command line, so I'll
need to dig up the Sybase documentation on what's possible.

> > Regards,
> --
> Marc-Andre Lemburg
> eGenix.com

Thank you very much for your patience and insight.

Cheers,

---Peter Herndon


From dcrespo at gmail.com  Tue Apr 12 11:41:35 2005
From: dcrespo at gmail.com (dcrespo)
Date: 12 Apr 2005 08:41:35 -0700
Subject: The convenient compiler for Python Apps and Distribution of it
In-Reply-To: <d3eu97$it2$1@domitilla.aioe.org>
References: <1113251280.923895.51860@l41g2000cwc.googlegroups.com>
	<1113251773.394507.88960@o13g2000cwo.googlegroups.com>
	<d3eu97$it2$1@domitilla.aioe.org>
Message-ID: <1113320495.876605.322460@z14g2000cwz.googlegroups.com>

the question is "is there an application
that can compiles standalone python applications for running under
Windows?" and "is there an application
that can compile standalone python applications for running under
Linux?". So I want a compiler for each platform, but that works.



From mal at egenix.com  Fri Apr  1 08:27:07 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Fri, 01 Apr 2005 15:27:07 +0200
Subject: ANN: BigDecimal - decimal arithmetic on very large intergers
In-Reply-To: <032720052340.23979.42474457000403FA00005DAB220699973508900A9C0E0C@comcast.net>
References: <032720052340.23979.42474457000403FA00005DAB220699973508900A9C0E0C@comcast.net>
Message-ID: <424D4C2B.5000606@egenix.com>

casevh at comcast.net wrote:
> BigDecimal is a Python class that supports decimal arithmetic on very large integers. BigDecimal was inspired by the posting of BigDec to c.l.py by Tim Peters. BigDecimal implements all the commonly used integer methods. (It doesn't implement any of the binary/shifting operations.) 
> 
> It has been optimized for performance. It uses a 4x4 Toom-Cook algorithm for multiplication and a new, very fast, division algorithm. If GMPY is available, it will be automatically used.
> 
> Performance examples, computing the decimal represendation of the 42nd Mersenne prime:
>     2**25964951 - 1
> 
> Tim Peter's posting to c.l.py: 13 minutes 41 seconds
> BigDecimal: 59 seconds
> BigDecimal w/gmpy: 10 seconds

You might want to look into mxNumber (part of the egenix-mx-experimental
package):

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

There's a C type called Integer in that package that basically
wraps the GMP integer type.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 01 2005)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From Stutz1969 at msn.com  Sat Apr 16 07:09:38 2005
From: Stutz1969 at msn.com (Craig)
Date: 16 Apr 2005 04:09:38 -0700
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 140)
In-Reply-To: <1113642114.685230.165130@o13g2000cwo.googlegroups.com>
References: <1113613608.511723.298610@o13g2000cwo.googlegroups.com>
	<1113642114.685230.165130@o13g2000cwo.googlegroups.com>
Message-ID: <1113649778.407659.278310@o13g2000cwo.googlegroups.com>

Lord... forgive the Holy Roller, spammers for they know not what they do



From timo.linna at gmail.com  Wed Apr  6 09:27:09 2005
From: timo.linna at gmail.com (Timo)
Date: 6 Apr 2005 06:27:09 -0700
Subject: Erroneous line number error in Py2.4.1 [Windows 2000+SP3]
Message-ID: <1112794029.667294.134370@f14g2000cwb.googlegroups.com>

For some reason Python 2.3.5 reports the error in the following program
correctly:

  File "C:\Temp\problem.py", line 7
SyntaxError: unknown decode error

..whereas Python 2.4.1 reports an invalid line number:

  File "C:\Temp\problem.py", line 2
SyntaxError: unknown decode error

----- problem.py starts -----
# -*- coding: ascii -*-

"""
Foo bar
"""

# ? is not allowed in ascii coding
----- problem.py ends -----

Does anyone have a clue what is going on? Without the encoding
declaration both Python versions report the usual deprecation warning
(just like they should be doing).

My environment: Windows 2000 + SP3.

BR,
    Timo



From mauriceling at acm.org  Wed Apr 20 19:36:03 2005
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 21 Apr 2005 09:36:03 +1000
Subject: Using Jython in Ant Build Process
Message-ID: <d46p19$pmc$1@domitilla.aioe.org>

Hi,

I am looking for a way to use Jython in Ant build process. I have some 
pure Python scripts (not using any C extensions) that I'll like to 
incorporate into Java using Jython. I heard that this can be done but 
you can I set up Ant to do this? Sorry, I'm no expert with Ant.

By the way, I'm using Eclipse.

Thanks again.

Cheers
Maurice


From sjmaster at gmail.com  Thu Apr 14 19:32:21 2005
From: sjmaster at gmail.com (Steve M)
Date: 14 Apr 2005 16:32:21 -0700
Subject: Function to log exceptions and keep on truckin
Message-ID: <1113521541.607497.166020@o13g2000cwo.googlegroups.com>

import sys, traceback
def e2str(id):
    """Return a string with information about the current exception. id
is arbitrary string included in output."""

    exc = sys.exc_info()
    file, line, func, stmt = traceback.extract_tb(exc[2])[-1]
    return("%s: %s line %s (%s): %s" % (id, func, line, repr(stmt),
str(exc[1])))


This function returns a string containing useful information about the
current exception.
It takes as argument an arbitrary string that gets included in the
output. You can include anything else that might be useful in this
string, such as a loop counter or other local variable.
You can use this function to log anything you'd want to know about an
exception but continue running.
For example:

for i in interable:
    try:
        some_function(i)
    except NonFatalError:
        print e2str(str(i))


For some reason I've been into closures lately, so I like to have the
following code in a general utility module, from which I import *:

def _make_e2str():
    """This function creates a closure e2str."""
    import sys, traceback
    def e2str(id):
        """Return a string with information about the current
exception. id is arbitrary string included in output."""

        exc = sys.exc_info()
        file, line, func, stmt = traceback.extract_tb(exc[2])[-1]
        return("%s: %s line %s (%s): %s" % (id, func, line, repr(stmt),
str(exc[1])))
    return e2str
e2str = _make_e2str()
del _make_e2str #clean up the namespace...



From neuhauser+python-list#python.org at sigpipe.cz  Tue Apr 12 07:06:36 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Tue, 12 Apr 2005 13:06:36 +0200
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <20050412110636.GD3735@isis.sigpipe.cz>

# xah at xahlee.org / 2005-04-12 03:25:33 -0700:
> QUOTE
> compile(
> pattern[, flags])
> 
> Compile a regular expression pattern into a regular expression  object,
> which can be used for matching using its match() and  search() methods,
> described below.
> 
> The expression's behaviour can be modified by specifying a  flags
> value. Values can be any of the following variables,  combined using
> bitwise OR (the | operator).
> UNQUOTE

> And what the fuck is it unclearly meant by "OR" operator with the
> mother fucking bitwise jargon?

    "bitwise OR (the | operator)": it doesn't speak about an "OR
    operator", does it?

> for a exposition of IT's fucking stupid docs and their fuckhead coders,
> see:
> http://xahlee.org/Periodic_dosage_dir/t2/xlali_skami_cukta.html

    Interesting reading, I might send you a few of my pet peeves for
    inclusion.

> you want to ask yourself this question:
> Can a seasoned programer, who is expert at least 2 languages, who is
> also a expert at Perl and knew regex well, and have just read the doc,
> must he, resort to many trial and error to see exactly what the doc is
> talking about?

    While I understand your frustration (I curse the same when I try to
    use the Python documentation), you are spoiling your message by
    the (IMNSHO well granted, but still) unhelpful profanity.

    Unfortunately, the python community seems to bathe in the
    misorganized half-documentation, see e. g.
    http://marc.theaimsgroup.com/?l=python-list&m=111303919606261&w=2
    especially the reply that (as I read it) suggested reverse
    engineering as a viable alternative to documentation.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From rkern at ucsd.edu  Wed Apr 20 07:55:26 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 20 Apr 2005 04:55:26 -0700
Subject: goto statement
In-Reply-To: <42664190.6010507@i.com.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
Message-ID: <d45fnc$5bk$1@sea.gmane.org>

Maxim Kasimov wrote:
> Simon Brunning wrote:
> 
>> On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
>>
>>> it would be quite useful for debuging porposes
>>
>>
>>
>> How does goto help you to remove bugs?
>>
>> I can certainly see how it helps you put them in in the first place...
>>
> 
> if you need to comment a couple of code (and then uncomment ), what are 
> you doing then?

Use comments?

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From simon.brunning at gmail.com  Wed Apr 20 09:22:02 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 14:22:02 +0100
Subject: goto statement
In-Reply-To: <d45kgl$f16$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua> <3cmuqpF6km9ruU1@individual.net>
	<d45kgl$f16$1@news.tsystems.kiev.ua>
Message-ID: <8c7f10c605042006223068539e@mail.gmail.com>

On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
> > Or, if you really like the spirit of goto,
> > use "if 0:".
> 
> ... and add tabs to each string

Get a decent text editor.

What are you using? Notepad?

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From superprad at gmail.com  Mon Apr 25 15:31:53 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 25 Apr 2005 12:31:53 -0700
Subject: Bounding box on clusters in a 2D list
In-Reply-To: <1114378980.909132.216600@f14g2000cwb.googlegroups.com>
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
	<1114378980.909132.216600@f14g2000cwb.googlegroups.com>
Message-ID: <1114457513.698160.28800@z14g2000cwz.googlegroups.com>

Just was wondering how to integrate the floodfill with the stack.I
guess it will get rid of recursion problem. You mean read all the
elements of the array to a stack and then push and pop based on
conditions?



From john at castleamber.com  Mon Apr 25 15:30:59 2005
From: john at castleamber.com (John Bokma)
Date: 25 Apr 2005 19:30:59 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<du7zmvn24gi.fsf@mozart.cc.tut.fi>
	<Xns9642BBB29D7FFcastleamber@130.133.1.4>
	<du77jiric4x.fsf@amadeus.cc.tut.fi>
Message-ID: <Xns964393A313881castleamber@130.133.1.4>

Ville Vainio wrote:

>>>>>> "John" == John Bokma <postmaster at castleamber.com> writes:
> 
>     John> Who told you Perl can't do exceptions?
> 
> Back when I learned (heh, I never 'really' learned, but knew enough to
> write programs in it) perl, almost every function call was followed by
> 
> or die("blah");

Yup, which throws an exception.

> i.e. the user had to check the error code.
>
> If the function would have
> raised an exception instead, such check would be redundant because it
> would never be executed.

true, Perl doesn't throw exceptions for you when an "or die" is required.

> In Python, all error conditions raise exceptions. If python
> 'supported' exceptions but standard library functions didn't raise
> them, the feature would not be worth much.

Agreed, one common error that beginners make a lot is not throwing 
exceptions.

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


From davecook at nowhere.net  Wed Apr 27 20:34:45 2005
From: davecook at nowhere.net (Dave Cook)
Date: Thu, 28 Apr 2005 00:34:45 GMT
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <slrnd70bt5.d0e.davecook@localhost.localdomain>

On 2005-04-27, monkey <m at m.com> wrote:

> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
>
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.

Pydev has some compelling features, but I wish I didn't have to run eclipse
to get them.  I use XEmacs.  Once upon a time emacs was considered bloated,
but it's tiny compared to eclipse.

Dave Cook


From martin.witte at gmail.com  Sat Apr 30 14:29:56 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Apr 2005 11:29:56 -0700
Subject: User Directory Path
In-Reply-To: <IKGdnQt3ufCXWe7fRVnyuQ@scarlet.biz>
References: <IKGdnQt3ufCXWe7fRVnyuQ@scarlet.biz>
Message-ID: <1114885796.215916.99730@f14g2000cwb.googlegroups.com>

os.getenv or os.envoron, see http://docs.python.org/lib/os-procinfo.html



From dalke at dalkescientific.com  Mon Apr 11 16:05:01 2005
From: dalke at dalkescientific.com (Andrew Dalke)
Date: Mon, 11 Apr 2005 20:05:01 GMT
Subject: Counting iterations
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
	<1113064744.144787.315120@o13g2000cwo.googlegroups.com>
	<pan.2005.04.09.18.17.29.903696@dalkescientific.com>
	<1113162320.578460.95300@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.04.11.20.05.07.75602@dalkescientific.com>

Derek Basch wrote:
> Interesting stuff Andrew. I do generally avoid string concantination
> for the reason listed in the Python Performance Tips but your analysis
> kinda puts that in question.

Thanks.

It was interesting for me to.  I hadn't looked at the implementation
for string % before and was rather surprised to find that it
overallocates 100 bytes to reduce the number of allocs done.  It's
simpler than the implementation I considered.

				Andrew
				dalke at dalkescientific.com



From jstroud at mbi.ucla.edu  Sat Apr 23 17:13:05 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 23 Apr 2005 14:13:05 -0700
Subject: Handling lists
In-Reply-To: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
References: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>
Message-ID: <200504231413.05464.jstroud@mbi.ucla.edu>

On Saturday 23 April 2005 12:50 pm, superprad at gmail.com wrote:
> I have a question on python lists.
> Suppose I have a 2D list
> list = [[10,11,12,13,14,78,79,80,81,300,301,308]]
> how do I convert it so that I arrange them into bins ?.
> so If i hvae a set of consecutive numbers i would like to represent
> them as a range in the list with max and min val of the range alone.
> I shd get something like
> list = [[10,14],[78,81],[300,308]]



Here is an interesting way:

>>> a = iter([1,2,3,4])
>>> [(b,a.next()) for b in a]
[(1, 2), (3, 4)]

James

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

http://www.jamesstroud.com/


From harold.fellermann at upf.edu  Wed Apr  6 06:38:09 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Wed, 6 Apr 2005 12:38:09 +0200
Subject: Class, object question.
In-Reply-To: <000601c539e8$5a35ac30$d502a8c0@JEFF>
References: <000601c539e8$5a35ac30$d502a8c0@JEFF>
Message-ID: <3e82093904dc90ae5924b6124993c347@upf.edu>

> What I am wondering is if I have a 2nd init? or something similar to 
> create a vector. Such as what follows and if I can how do I go about 
> implementing it?
>
> Class vector(point):
>     def __init___(self, point1, point2):
>         self.i = point2.get_x() - point1.get_x()
>         self.j = point2.get_y() - point1.get_y()
>         self.k = ?point2.get_z() - point1.get_z()
>
>     def __init___(self, i, j, k):
>         self.i = i
>         self.j = j
>         self.k = k
>
> That way I can define a vector either using 2 points or if I have the 
> vector data itself?


Well, what you want to do -- polymorphism of function signatures -- can 
be
implemented like this:

class vector_1(point) :
	def __init__(self,*args) :
		if len(args) == 2 and isinstance(args[0],point) and 
isinstance(args[1],point) :
			self.i = args[0].get_x() - args[1].get_x()
			self.j = args[0].get_y() - args[1].get_y()
			self.k = args[0].get_z() - args[1].get_z()

		elif len(args) == 3 :
			self.i,self.j,self.k = args

		else :
			raise ValueError, "wrong arguments for instance initialization"


You can also find a nice implementation by Guido van Rossum using 
decorators
at Artima (look for multimethods).
However, I would prefer to avoid this sort of polymorphism because it 
only
obfuscates your code. IMHO, there should be exactly one clear way to 
initialize
an instance. Therefore, I suggest the provide a class method that 
serves as a
special instance factory:

class vector_2(point) :
	def __init__(self,i,j,k) :
		self.i = i
		self.j = j
		self.k = k

	@classmethod
	def difference(cls,point1,point2) :
		return cls(
			point1.get_x() - point2.get_x(),
			point1.get_y() - point2.get_y(),
			point1.get_z() - point2.get_z()
		)

# how to use it:
point1 = Point(4,5,6)
point2 = Point(1,2,3)
vec = vector_2.difference(point1,point2)


I wonder, why your vector inherits from point though.
And of course, class is written lower case.

Cheers,

- harold -

--
Es ist schon l?ngst alles gesagt worden --
aber noch nicht von jedem.
-- Karl Valentin



From sabbey at u.washington.edu  Sun Apr 17 18:32:56 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sun, 17 Apr 2005 15:32:56 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <4261da60.140413834@news.oz.net>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<4260bc72.67216001@news.oz.net>
	<Pine.A41.4.61b.0504161733560.72462@dante72.u.washington.edu>
	<4261da60.140413834@news.oz.net>
Message-ID: <Pine.A41.4.61b.0504171520150.232474@dante76.u.washington.edu>

Bengt Richter wrote:
> Hm, one thing my syntax does, I just noticed, is allow you
> to pass several thunks to a thunk-accepter, if desired, e.g.,
> (parenthesizing this time, rather than ending ():<suite> with
> dedented comma)
>
>    each(
>        ((i):  # normal thunk
>            print i),
>        ((j):  # alternative thunk
>            rejectlist.append(j)),
>        [1,2])
>
> <snip>
>

I see that it might be nice to be able to use multiple thunks, and to be 
able to specify the positions in the argument list of thunks, but I think 
allowing a suite inside parentheses is pretty ugly.  One reason is that it 
is difficult to see where the suite ends and where the argument list 
begins again.  I'm not sure even what the syntax would be exactly.  I 
suppose the suite would always have to be inside its own parentheses? 
Also, you wind up with these closing parentheses far away from their 
corresponding open parentheses, which is also not pretty.  It's getting 
too Lisp-like for my tastes.

-Brian



From exogen at gmail.com  Fri Apr  1 18:01:49 2005
From: exogen at gmail.com (Brian Beck)
Date: Fri, 01 Apr 2005 18:01:49 -0500
Subject: Help with splitting
In-Reply-To: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
Message-ID: <d2kjtk$qda$1@eeyore.INS.cwru.edu>

RickMuller wrote:
> There's a chance I was instead thinking of something in the re module,
> but I also spent some time there without luck. Could someone point me
> to the right function, if it exists?

The re solution Jeremy Bowers is what you want. Here's another (probably 
much slower) way for fun (with no surrounding empty strings):

py> from itertools import groupby
py> [''.join(g) for k, g in groupby('  test ing ', lambda x: x.isspace())]
['  ', 'test', ' ', 'ing', ' ']


I tried replacing the lambda thing with an attrgetter, but apparently my 
understanding of that isn't perfect... it groups by the identify of the 
bound method instead of calling it...

--
Brian Beck
Adventurer of the First Order


From mauriceling at acm.org  Sun Apr 24 06:19:59 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sun, 24 Apr 2005 20:19:59 +1000
Subject: bytecode non-backcompatibility
Message-ID: <d4frsf$ku$1@domitilla.aioe.org>

Hi,

I've been using Python for about 2 years now, for my honours project and 
now my postgrad project. I must say that I am loving it more and more 
now. From my knowledge, Python bytecodes are not back-compatible. I must 
say that my technical background isn't strong enough but is there any 
good reason for not being back-compatible in bytecodes?

My problem is not about pure python modules or libraries but the problem 
is with 3rd party libraries with C bindings (not python pure). It means 
that with every upgrade of python, I have to reinstall all my 3rd party 
libraries which can be quite a bit of work...

I do hope this problem will be sorted out some day.

Cheers
Maurice


From http  Sat Apr  2 01:46:21 2005
From: http (Paul Rubin)
Date: 01 Apr 2005 22:46:21 -0800
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
	<7xsm2e7kg7.fsf@ruckus.brouhaha.com>
	<slrnd4igas.20i.apardon@rcpc42.vub.ac.be>
	<7xvf7aws6c.fsf@ruckus.brouhaha.com>
	<slrnd4ijtf.20i.apardon@rcpc42.vub.ac.be>
	<7xvf79ehf9.fsf@ruckus.brouhaha.com>
	<slrnd4kq5v.20i.apardon@rcpc42.vub.ac.be>
	<7xhditlckv.fsf@ruckus.brouhaha.com>
	<slrnd4rbep.l2j.nick@irishsea.home.craig-wood.com>
Message-ID: <7x1x9t1xs2.fsf@ruckus.brouhaha.com>

Nick Craig-Wood <nick at craig-wood.com> writes:
> I believe futex is the thing you want for a modern linux.  Not
> very portable though.

That's really cool, but I don't see how it can be a pure userspace
operation if the futex has a timeout.  The kernel must need to keep
track of the timeouts.  However, since futexes can be woken by any
thread, the whole thing can be done with just one futex.  In fact the
doc mentions something about using a file descriptor to support
asynchronous wakeups, but it's confusing whether that applies here.


From bokr at oz.net  Fri Apr  1 21:34:39 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 02 Apr 2005 02:34:39 GMT
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
Message-ID: <424e0403.72206757@news.oz.net>

On 1 Apr 2005 20:00:13 -0500, aahz at pythoncraft.com (Aahz) wrote:

>In article <mailman.1192.1112376393.1799.python-list at python.org>,
>=?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:
>>[Sunnan]
>>>
>>> [...] for Pythons ideal of having one canonical, explicit way to
>>> program.
>>
>>No doubt it once was true, but I guess this ideal has been abandoned a
>>few years ago.
>>
>>My honest feeling is that it would be a mis-representation of Python,
>>assertng today that this is still one of the Python's ideals.
           ^^^^^--in particular?? That makes for a complex sentence ;-)
>
>Mind providing evidence rather than simply citing your feelings?  Yes,
>there's certainly redundancy in Python right now, but a large portion of
>that will go away in Python 3.0.  So where's the abandonment of the
>ideal?
>-- 
>Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/
>
>"The joy of coding Python should be in seeing short, concise, readable
>classes that express a lot of action in a small amount of clear code -- 
>not in reams of trivial code that bores the reader to death."  --GvR

Regards,
Bengt Richter


From deetsNOSPAM at web.de  Sat Apr  2 12:59:30 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 02 Apr 2005 19:59:30 +0200
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
Message-ID: <d2mmhv$vf8$05$1@news.t-online.com>

> statements documenting the flow in a few minutes.  I'm still a bit
> fuzzy on how the arguments are stored and passed.

The arguments are part of the outer scope of the function returned, and thus
they ar kept around. That's standart python,too:

def foo():
    a = 10
    def bar():
       return a*a
    return bar

print foo()()


No decorator-specific magic here - just references kept to outer frames
which form the scope for the inner function.

-- 
Regards,

Diez B. Roggisch


From kent37 at tds.net  Tue Apr 19 08:05:23 2005
From: kent37 at tds.net (Kent Johnson)
Date: Tue, 19 Apr 2005 08:05:23 -0400
Subject: uploading/streaming a file to a java servlet
In-Reply-To: <mailman.2080.1113885605.1799.python-list@python.org>
References: <mailman.2080.1113885605.1799.python-list@python.org>
Message-ID: <4264efca$1_2@newspeer2.tds.net>

Vasil Slavov wrote:
> I am working on a school project written in Python (using mod_python)
> and I need to upload a file to a java servlet. Here are the high-level
> instructions given by the servlet authors:
> 
> - Open the file for reading.
> - Open an HTTP connection to the servlet and get the RequestStream object.
> - Read bytes from the file and write them to the stream until the
> entire file has been read.
> - Close the stream.

Is the request supposed to be a GET or POST or ?? I'll assume POST because sending a data stream on 
a GET is just too ugly. Even so IMO this protocol is perverse and you will have to work around it. 
You have to avoid putting the request parameters in the request body (which is normal for a POST) 
and avoid making the data into another request parameter (which would also be normal).

> Here is how the url looks like:
> http://10.0.0.21/MillenniumMobile/servlet/com.cerner.capstone.dictation.FileStorageServlet?TransactionName=AddDictationFile&FileName=myfile.wav&Username=team1&Password=password&Domain=mobj
> 
> I am having a hard time figuring out how to translate the above
> instructions into something which can be implemented in Python. How am
> I supposed to "stream" the file.

I would try something like this:
url = 
'http://10.0.0.21/MillenniumMobile/servlet/com.cerner.capstone.dictation.FileStorageServlet?TransactionName=AddDictationFile&FileName=myfile.wav&Username=team1&Password=password&Domain=mobj'
f = open(datafile, 'rb')
data = f.read()  # or whatever you need to do to get the actual data into a string
f.close()
req = urllib2.url_open(url, data)
result = req.read()

> I get a successful XML response with the following code

Your description of the protocol doesn't say anything about XML, did you leave something out?

Kent


From bvande at po-box.mcgill.ca  Mon Apr 18 23:39:43 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Mon, 18 Apr 2005 23:39:43 -0400
Subject: pydoc preference for triple double over triple
	single	quotes--anyreason?
In-Reply-To: <4263a1e2$1_3@newspeer2.tds.net>
References: <mailman.2008.1113679688.1799.python-list@python.org>
	<42617449_3@newspeer2.tds.net>
	<mailman.2030.1113757909.1799.python-list@python.org>
	<4262c00e$1_3@newspeer2.tds.net>
	<mailman.2032.1113772321.1799.python-list@python.org>
	<4263a1e2$1_3@newspeer2.tds.net>
Message-ID: <42647D7F.7060605@po-box.mcgill.ca>

Kent Johnson said unto the world upon 2005-04-18 08:20:

<SNIP several iterations clarifying the problem>

>> The puzzle for me was that if I enter my module name in the "Search 
>> for" box, it shows up in the list of results, as expected. But whether 
>> the results list entry for my module incorporates the description form 
>> my module's docstring or instead shows my module as having "(no 
>> description)" is a function of which style of triple quotes I used. 
>> (If my module docstring is enclosed by triple double quotes, the 
>> description is extracted from my module's docstring. If it uses triple 
>> single quotes instead, for purposes of the results list my module's 
>> docstring is ignored, and the module is listed as having "(no 
>> description)".)
> 
> 
> OK, now I get it. I don't use pydoc much and I missed that display.
> 
> This is indeed a bug in pydoc. If you look at lines 194, 195 and 201 in 
> pydoc.py (Python 2.4.1 version) you can see that it is parsing out the 
> module docstring itself and it only looks for """ strings.
> 
> Here is a patch that accepts ''' strings as well. Though a better patch 
> would allow any kind of string. I filed a bug report at
> http://sourceforge.net/tracker/index.php?func=detail&aid=1185124&group_id=5470&atid=105470 
> 
> 
> Kent

<SNIP patch>

Thanks for sticking with this, Kent.

Also, thanks for the patch and for filing the bug. (I had thought of 
doing so before posting, but don't yet feel quite confident enough in 
my judgement that I'd be putting signal rather than noise into the 
bug-tracker.)

Best,

Brian vdB



From davecook at nowhere.net  Thu Apr 28 20:16:54 2005
From: davecook at nowhere.net (Dave Cook)
Date: Fri, 29 Apr 2005 00:16:54 GMT
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <slrnd72v7m.4ob.davecook@localhost.localdomain>

On 2005-04-28, demon_slayer2839 at yahoo.com <demon_slayer2839 at yahoo.com> wrote:

> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.

I haven't seen anything specifically written for Python that gets much
beyond the mechanics.

One of the best books I've read on OOP is _Smalltalk, Objects, and Design_
by Chamond Liu.  It would be nice to have something like that for Python.

Dave Cook


From radam2_ at _tampabay.rr.com  Mon Apr 11 00:09:49 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Mon, 11 Apr 2005 04:09:49 GMT
Subject: templating system
References: <mailman.1644.1113148510.1799.python-list@python.org>
Message-ID: <cpsj511k8grtvdaah5p42khjbbbd5jc9uq@4ax.com>

On Sun, 10 Apr 2005 17:55:06 +0200, Ksenia Marasanova
<ksenia.marasanova at gmail.com> wrote:

>Hi,
>
>I am looking for fast, simple templating system that will allow me to
>do the following:
>- embed Python code (or some templating code) in the template
>- generate text output (not only XML/HTML)
>
>I don't need a framework (already have it), but just simple
>templating. The syntax I had in mind is something like that:
>
># in Python module
>def some_view():
>    # some code goes here...
>    records = get_some_data()
>    req = get_request_class()
>    return template('some_template.tmpl', **locals()).render()
>
># in some_template.tmpl:
>
><ul>
><%for record in records%>
>    <li><a href="<%=record.id%>"><%=record.title%></a></li>
><%end for%>
></ul>
>
>
>>From what I saw Cheetah seems to be the only one that can do it. I was
>hoping there might be alternatives that I've missed :)
>Thanks!

I use Cheetah along with publish.py by Chris Gonnerman.  Cheetah
constructs web pages using .html templates and a python script, (which
is why I like it).  Publish.py gives me fast one click publishing to
the web server, adding or removing files from the server to match my
local publish directory.  

Looks like Chris also has a templating program here as well.  I
haven't checked it out yet, so can't tell you about it.

http://newcenturycomputers.net/projects/webpub.html

Cheers,
Ron



From bedouglas at earthlink.net  Wed Apr 13 16:50:05 2005
From: bedouglas at earthlink.net (bruce)
Date: Wed, 13 Apr 2005 13:50:05 -0700
Subject: python guru... ViewCVS
Message-ID: <00a801c5406a$5f99e780$0301a8c0@Mesa.com>

hi...

i'm playing/testing a python file (viewcvs.cgi/viewcvs.pyc) and i need to
talk with someone for a few minutes... i have no knowledge of python.

the file apparently opens up/reads a config file. however, i'm confused at
figuring out how to debug the file, to see what/where it's going in the
file...

i'm pretty sure that there is an issue with the config file. but the weird
thing is, i've actually changed the name of the config file, and i still get
the same err from the app, which is weird...

i've tried to print out a few err/msg statements, but i'm screwing something
up, because it appears that the web page can't print the print statements...

any thoughts/ideas/help would be greatly appreciated...

thanks

bruce
bedouglas at earthlink.net




From __peter__ at web.de  Fri Apr 29 15:52:15 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 29 Apr 2005 21:52:15 +0200
Subject: Reusing object methods?
References: <d4trsp$jsl$1@bagan.srce.hr>
Message-ID: <d4u38j$bdt$03$1@news.t-online.com>

Ivan Voras wrote:

> I want to 'reuse' the same method from class A in class B, and without
> introducing a common ancestor for both of them - is this possible in an
> elegant, straightforward way?

Straightforward, if not elegant:

>>> def method(self, params):
...     print self, params
...
>>> class A:
...     method = method
...
>>> class B:
...     method = method
...
>>> A().method(42)
<__main__.A instance at 0x402aadac> 42
>>> B().method(42)
<__main__.B instance at 0x402aadac> 42
>>>

Peter



From prabapython at yahoo.co.in  Sat Apr  9 05:38:21 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Sat, 9 Apr 2005 10:38:21 +0100 (BST)
Subject: change the date string into timestamp
In-Reply-To: 6667
Message-ID: <20050409093821.98044.qmail@web8402.mail.in.yahoo.com>

Dear All,

    In Php strtotime() will change a date
string into timestamp.  I want to know which 
python function will  change a date string
into timestamp. 


Date string format is below 

Fri, 8 Apr 2005 09:22:14 +0900

regards
Prabahar

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From jason at tishler.net  Sat Apr 30 09:24:25 2005
From: jason at tishler.net (Jason Tishler)
Date: Sat, 30 Apr 2005 09:24:25 -0400
Subject: Fwd: how to find the drive in python/cygwin?
In-Reply-To: <426EE4B8.6910F6DD@pauahtun.org>
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
	<3511dc7505042617524edd244a@mail.gmail.com>
	<426EE4B8.6910F6DD@pauahtun.org>
Message-ID: <20050430132423.GA2824@tishler.net>

Ivan,

On Tue, Apr 26, 2005 at 07:02:48PM -0600, Ivan Van Laningham wrote:
> Use win32api to find drives:
> 
> ====cut here====
> #!/usr/bin/python
> # -*- coding: utf-8 -*-
> 
> import os
> import os.path
> import win32api
> [snip]

AFAICT, the win32api module has not been ported to Cygwin Python.

Jason

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


From webmaster at smallco.com  Mon Apr 11 14:07:57 2005
From: webmaster at smallco.com (Webmaster)
Date: Mon, 11 Apr 2005 14:07:57 -0400 (EDT)
Subject: Automatic response to your mail (Error)
Message-ID: <m1107/13/04M57.2D145102A0F@sparky.bcentralhost.com>

The automatic reply to this e-mail which you should have
received in response to your e-mail to webmaster at smallco.com has not been defined.

Please contact postmaster at smallco.com for assistance.


From no.spam at see.below.es  Wed Apr 20 14:18:28 2005
From: no.spam at see.below.es (Javier Bezos)
Date: Wed, 20 Apr 2005 20:18:28 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com><200504201050.54062.jstroud@mbi.ucla.edu>
	<mailman.2195.1114020091.1799.python-list@python.org>
Message-ID: <nax9e.289257$r4.17675432@news-reader.eresmas.com>


"James Stroud" <jstroud at mbi.ucla.edu> escribi? en el mensaje
news:mailman.2195.1114020091.1799.python-list at python.org...
> I like this, it works for any integer.
> >>> str="asdfjkl;"
> >>> i=-400
> >>> print str[:i]+str[i:]
> asdfjkl;
> >>> i = 65534214
> >>> print str[:i]+str[i:]
> asdfjkl;

Actually, this has no relation with the half-open
slices but with the fact that if i goes beyond
the limit of the string then Python, wisely, doesn't
raise an error but instead return the string until
the end. When people say that half-open slices work
for every i, they are tinking in the case i=0.

Javier

___________________________________________________________
Javier Bezos                | TeX y tipograf?a
jbezos at wanadoo dot es    | http://perso.wanadoo.es/jbezos
............................|...............................
CervanTeX (Spanish TUG)     | http://www.cervantex.org








From kay.schluehr at gmx.net  Sun Apr 17 12:27:34 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 17 Apr 2005 09:27:34 -0700
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
Message-ID: <1113755254.226237.138550@z14g2000cwz.googlegroups.com>

> Exactly. Except the above example is from the day-old-bread
items-tuple-returning version of :: ;-)
> And with an ordered dict subtype there is no need for the generator
expression either,
> since there is a values method for dicts (which in the subtype would
preserve order). E.g.,
>
>  x = property(*seq) where:
>              seq = (::
>                  def get_x():
>                      return self.__x
>                  def set_x(value):
>                      self.__x = value
>                  del_x = None
>                  doc   = "I'm the 'x' property." ).values())
>
> Or more directly:
>
>  x = property(*(::
>                  def get_x():
>                      return self.__x
>                  def set_x(value):
>                      self.__x = value
>                  del_x = None
>                  doc   = "I'm the 'x' property." ).values())

Hmmm ... now You eliminate "where" completely in favor for '::'. This
may be reasonable because '::' is stronger and less context dependent.
But on the other hand it may be also reasonable to eliminate '::'
towards a stronger "where" ;)


x = property(**kw) where kw:
            doc = "I'm the 'x' property."
            def fget(self):
                return self.__x


x = property(*args) where args:
            def fget(self):
                return self.__x
            fset = None
            fdel = None
            doc = "I'm the 'x' property."


Put definitions into a list:

l = list(*args) where args:
        def fget(self):
            return self.__x
        doc = "I'm the 'x' property."


Nest suites:

x = property(*args) where args:
        t = tuple(*t) where t:
            def fget(self):
                return self.__x
            fset = None
            fdel = None
            doc = "I'm the 'x' property."


Evaluate conditions:

if f(*args)==1 where args:
   x = 1
   y = 2

I think this version is more mainstream syntax ( and without braces and
additional punctuation ) than the unary prefix operator '::' which
drops statements into expressions within expressions.
   
Regards,
Kay



From ny_r_marquez at yahoo.com  Tue Apr 19 12:01:21 2005
From: ny_r_marquez at yahoo.com (RM)
Date: 19 Apr 2005 09:01:21 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <mailman.2114.1113926020.1799.python-list@python.org>
References: <mailman.2114.1113926020.1799.python-list@python.org>
Message-ID: <1113926481.273458.318530@g14g2000cwa.googlegroups.com>

Oops.  Sorry, you are right. :)



From modelnine at ceosg.de  Fri Apr 15 01:04:18 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Fri, 15 Apr 2005 07:04:18 +0200
Subject: question about functions
In-Reply-To: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
References: <1113540288.415656.325750@l41g2000cwc.googlegroups.com>
Message-ID: <200504150704.22026.modelnine@ceosg.de>

Am Freitag, 15. April 2005 06:44 schrieb chris patton:
> In other words, can I call the arguments from a list?

Yes.

>>> def testfunc(*args):
...   print args[0]
...   print args[1]
...
>>> testfunc("this is","a test")
this is
a test

Read up on positional and keyword arguments (the latter are something that'd 
make me choose python over anything else instantly) in the Python tutorial 
and documentation.

-- 
--- Heiko.
listening to: Pearl Jam - Given To Fly
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From jzgoda at gazeta.usun.pl  Mon Apr 18 15:46:04 2005
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Mon, 18 Apr 2005 21:46:04 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <vt1dj2-r31.ln1@home.rogerbinns.com>
References: <425a9869$0$38039$bed64819@news.gradwell.net><mailman.1769.1113320562.1799.python-list@python.org><1o31j2-7l6.ln1@home.rogerbinns.com>
	<mailman.1876.1113453407.1799.python-list@python.org>
	<n9c1j2-198.ln1@home.rogerbinns.com>
	<d3vscb$i8r$1@lnx107.hrz.tu-darmstadt.de>
	<vt1dj2-r31.ln1@home.rogerbinns.com>
Message-ID: <d4132o$889$1@nemesis.news.tpi.pl>

Roger Binns napisa?(a):

> The distutils approach is mainly useful for packages and libraries,
> not for applications.  And of course it still has the prerequisites
> issues mentioned earlier.

This reminds me, that there is still no clear direction as to where 
install Python applications on Linux if one wants to be FHS-compliant. 
Teoretically, one may try to install to /opt/appname hierarchy, but many 
distributions simply refuse such packages (as it was the case with my 
JPA in PLD Linux).

-- 
Jarek Zgoda
http://jpa.berlios.de/ | http://www.zgodowie.org/


From valinor at linuxmail.org  Fri Apr  8 03:03:42 2005
From: valinor at linuxmail.org (foten)
Date: 8 Apr 2005 00:03:42 -0700
Subject: Problems extracting attachment from email
References: <cf4db78a.0504070817.3c776e07@posting.google.com>
	<Wvg5e.727$uA3.224@news02.roc.ny>
Message-ID: <cf4db78a.0504072303.2683be55@posting.google.com>

Lee Harr <lee at example.com> wrote in message news:<Wvg5e.727$uA3.224 at news02.roc.ny>...
> On 2005-04-07, foten <valinor at linuxmail.org> wrote:
> > The problem I'm having is when I'm trying to extract the
> > attachement using
> >         f=open(Filename, "wb")
> >         f.write(msg.get_payload(decode=1))
> >         f.close()
> > Not the whole message is decoded and stored!
> > When only trying
> >         f.write(msg.get_payload())
> > I see that the last 255 bytes are missing.
> >
> 
> 
> What happens if you do...
> 
> m = msg.get_payload(decode=1)
> f.write(m)
> f.write(m)
> f.close()
> ?
> 
> Just wondering if maybe some buffer not
> being flushed properly.
> 
> Maybe could replace the 2nd f.write()
> with an f.flush()
Lee Harr <lee at example.com> wrote in message news:<Wvg5e.727$uA3.224 at news02.roc.ny>...
> On 2005-04-07, foten <valinor at linuxmail.org> wrote:
> > The problem I'm having is when I'm trying to extract the
> > attachement using
> >         f=open(Filename, "wb")
> >         f.write(msg.get_payload(decode=1))
> >         f.close()
> > Not the whole message is decoded and stored!
> > When only trying
> >         f.write(msg.get_payload())
> > I see that the last 255 bytes are missing.
> >
> 
> 
> What happens if you do...
> 
> m = msg.get_payload(decode=1)
> f.write(m)
> f.write(m)
> f.close()
> ?
> 
> Just wondering if maybe some buffer not
> being flushed properly.
> 
> Maybe could replace the 2nd f.write()
> with an f.flush()

Thanx for the ideas!

If I do
    f.write(m)
    f.write(m)
nothing is changed. After the first write I'm missing 255 bytes and the 
second write just doubles the data. After this I'm missing 510 bytes.
Doing a flush doesn't help either, if I'm not misstaken, calling close()
on a file inplicitly calls flush().

get_payload() fails to deliver the correct amount of data, in this case ~82k...

This drives my crazy!


From radam2 at tampabay.rr.com  Thu Apr 21 17:45:28 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Thu, 21 Apr 2005 21:45:28 GMT
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <q7J9e.8283$716.5185@tornado.tampabay.rr.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<q7J9e.8283$716.5185@tornado.tampabay.rr.com>
Message-ID: <Y9V9e.10190$5f.2390@tornado.tampabay.rr.com>

Ron wrote:
> seberino at spawar.navy.mil wrote:
> 
>> Many people I know ask why Python does slicing the way it does.....
>>
>> Can anyone /please/ give me a good defense/justification???
>>
>> I'm referring to why mystring[:4] gives me
>> elements 0, 1, 2 and 3 but *NOT* mystring[4] (5th element).
>>

 > There are actually 4 different ways to slice ....

> Where s = 'abcd'
> With s[i,j]
> 
> Foreword slices index, forward steps
>     a,  b,  c,  d
> i=  0,  1,  2,  3
> j=  1,  2,  3,  4
>
> s[0,4] = 'abcd'
> s[1,3] = 'bc'
> .......


Minor correction to this.  It's what I get for not realizing how late it 
was.

Where s = 'abcd'
With s[i:j:step]

Positive slice index, (+1 step)
      a,  b,  c,  d
  i=  0,  1,  2,  3
  j=  1,  2,  3,  4

  s[0:4] = 'abcd'
  s[1:3] = 'bc'

Positive slice index, (-1 step)
      a,  b,  c,  d
  i=  0,  1,  2,  3
  j= -5, -4, -3, -2

  s[3:-5:-1] = 'dcba'
  s[2:-4:-1] = 'cb'

Negative slice index, (+1 step)
      a,  b,  c,  d
  i= -4, -3, -2, -1
  j=  1,  2,  3,  4

  s[-4:4] = 'abcd'
  s[-3:3] = 'bc'

Reverse slice index, (-1 step)
      a,  b,  c,  d
  i= -4, -3, -2, -1
  j= -5, -4, -3, -2

  s[-1:-5:-1] = 'dcba'
  s[-2:-4:-1] = 'cb'



Cheers,
Ron_Adam


From samantha7395 at hotmail.com  Sun Apr 10 13:35:54 2005
From: samantha7395 at hotmail.com (Samantha)
Date: Sun, 10 Apr 2005 10:35:54 -0700
Subject: very simple tkinter demo program
References: <aQX5e.1205416$35.44366592@news4.tin.it>
	<9NidnQVTQ9LKMMXfRVn-tQ@adelphia.com>
	<oE76e.1206995$35.44444963@news4.tin.it>
Message-ID: <IN2dnXcC6-19_sTfRVn-sg@adelphia.com>

Thanks that worked.
S
"max(01)*" <max2 at fisso.casa> wrote in message 
news:oE76e.1206995$35.44444963 at news4.tin.it...
> Samantha wrote:
>> I can not get it to run.
>> S
>
> sorry about that. baybe it is a conflict between tabstop width in my 
> editor and in my newsreader.
>
> i substituted tabs with spaces and i hope now you can run it.
>
> bye
>
> macs
>
> ----cuthere----
>
> from Tkinter import *
>
> class MiaApp:
>   def __init__(self, genitore):
>
>     self.MioGenitore = genitore
>
>     fonte = ("Helvetica", "12")
>
>     self.campi = ["Cognome", "Nome" , "Data di nascita"]
>
>     quadro_grande = Frame(genitore)
>     quadro_grande.pack(expand = YES, fill = BOTH)
>
>     quadro_menu = Frame(quadro_grande)
>     quadro_menu.configure(
>       bd = 1,
>       relief = RAISED
>       )
>     quadro_menu.pack(side = TOP, fill = X)
>
>     pm_file = Menubutton(quadro_menu)
>     pm_file.configure(text = "File")
>     pm_file.pack(side = LEFT)
>
>     m_file = Menu(pm_file)
>     pm_file.configure(menu = m_file)
>     m_file.configure(tearoff = NO)
>     m_file.add_command(
>       label = "Scrivi",
>       command = self.premuto_scrivi
>       )
>     m_file.add_command(
>       label = "Leggi",
>       command = self.premuto_leggi
>       )
>     m_file.add_separator()
>     m_file.add_command(
>       label = "Chiudi",
>       command = genitore.destroy
>       )
>
>     pm_mod = Menubutton(quadro_menu)
>     pm_mod.configure(text = "Modifica")
>     pm_mod.pack(side = LEFT)
>
>     pm_aiuto = Menubutton(quadro_menu)
>     pm_aiuto.configure(text = "?")
>     pm_aiuto.pack(side = RIGHT)
>
>     msg = Label(quadro_grande)
>     msg.configure(
>       font = fonte,
>       relief = RIDGE,
>       wraplength = "10c",
>       justify = LEFT,
>       text = u"Questo \u00E8 un programma in Python \
> che trae ispirazione da un analogo lavoro del collega \
> G. Renda. Il programma originale era scritto \
> in linguaggio Java, e sfruttava le librerie JFC \
> (\u00ABJava Foundation Class\u00BB, dette anche \
> \u00ABSwing\u00BB); questo invece usa le librerie Tk, \
> mediante il modulo Tkinter."
>       )
>     msg.pack(
>       side = TOP,
>       padx = "2m",
>       pady = "2m"
>       )
>
>     quadro_pulsanti = Frame(quadro_grande)
>     quadro_pulsanti.pack(
>       side = BOTTOM,
>       fill = X,
>       padx = "2m",
>       pady = "2m"
>       )
>
>     scrivi = Button(quadro_pulsanti)
>     scrivi.configure(
>       text = "Scrivi",
>       command = self.premuto_scrivi
>       )
>     scrivi.pack(side = LEFT, expand = YES)
>
>     leggi = Button(quadro_pulsanti)
>     leggi.configure(text = "Leggi", command = self.premuto_leggi)
>     leggi.pack(side = LEFT, expand = YES)
>
>     chiudi = Button(quadro_pulsanti)
>     chiudi.configure(text = "Chiudi", command = genitore.destroy)
>     chiudi.pack(side = LEFT, expand = YES)
>
>   def premuto_scrivi(self):
>     InserimentoRecord()
>
>   def premuto_leggi(self):
>     ConsultazioneRecord()
>
> class InserimentoRecord(Toplevel):
>   def __init__(self):
>
>     Toplevel.__init__(self)
>
>     self.titolo = "Inserimento"
>     self.wm_title(self.titolo)
>
>     quadro_grande = Frame(self)
>     quadro_grande.pack(expand = YES, fill = BOTH)
>
>     self.quadro_pulsanti = Frame(quadro_grande)
>     self.quadro_pulsanti.pack(
>       side = BOTTOM,
>       fill = X,
>       padx = "2m",
>       pady = "2m"
>       )
>
>     quadri_ing = []
>     self.n = len(miaApp.campi)
>     self.var = []
>     eti = []
>     larg_eti = max(map(len, miaApp.campi))
>     ing = []
>     for i in range(self.n):
>       quadri_ing.append(None)
>       self.var.append(None)
>       ing.append(None)
>       eti.append(None)
>       quadri_ing[i] = Frame(quadro_grande)
>       quadri_ing[i].pack(side = TOP, expand = YES, fill = BOTH)
>       self.var[i] = StringVar()
>       eti[i] = Label(quadri_ing[i])
>       eti[i].configure(
>         text = miaApp.campi[i] + ": ",
>         width = larg_eti,
>         anchor = E
>         )
>       eti[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>       ing[i] = Entry(quadri_ing[i], textvariable = self.var[i])
>       ing[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>
>     self.salva = Button(self.quadro_pulsanti)
>     self.salva.configure(
>       text = "Salva",
>       command = self.premuto_salva
>       )
>     self.salva.pack(side = LEFT, expand = YES)
>
>     self.annulla = Button(self.quadro_pulsanti)
>     self.annulla.configure(
>       text = "Annulla",
>       command = self.premuto_annulla
>       )
>     self.annulla.pack(side = LEFT, expand = YES)
>
>   def premuto_salva(self):
>     import tkFileDialog
>     import pickle
>
>     dati = []
>     for i in range(self.n):
>       dati.append(None)
>       dati[i] = self.var[i].get()
>
>     nomefile = tkFileDialog.asksaveasfilename(
>       defaultextension = ".ana",
>       filetypes = [
>         ("Record anagrafici", "*.ana"),
>         ("Tutti i file", "*")
>         ]
>       )
>
>     if nomefile:
>       f = open(nomefile, "w")
>       pickle.dump(dati, f)
>       f.close()
>
>     self.destroy()
>
>   def premuto_annulla(self):
>     self.destroy()
>
> class ConsultazioneRecord(Toplevel):
>   def __init__(self):
>
>     import tkFileDialog
>
>     nomefile = tkFileDialog.askopenfilename(
>       defaultextension = ".ana",
>       filetypes = [
>         ("Record anagrafici", "*.ana"),
>         ("Tutti i file", "*")
>         ]
>       )
>
>     if nomefile:
>
>       try:  ### Il metodo 'pickle.load' potrebbe generare una
>             ### eccezione se l'utente cerca di aprire un file
>             ### non del formato giusto
>
>         Toplevel.__init__(self)
>
>         self.titolo = "Consultazione"
>         self.wm_title(self.titolo)
>
>         quadro_grande = Frame(self)
>         quadro_grande.pack(expand = YES, fill = BOTH)
>
>         eti_rec = Label(quadro_grande)
>         eti_rec.configure(
>           text = "Record: " + nomefile,
>           relief = RIDGE
>           )
>         eti_rec.pack(
>           side = TOP,
>           fill = X,
>           padx = "5m",
>           pady = "5m"
>           )
>
>         self.quadro_pulsanti = Frame(quadro_grande)
>         self.quadro_pulsanti.pack(
>           side = BOTTOM,
>           fill = X,
>           padx = "2m",
>           pady = "2m"
>           )
>
>         import pickle
>
>         quadri_eti = []
>         eti_campi = []
>         eti_val = []
>         larg_eti_campi = max(map(len, miaApp.campi))
>         f = open(nomefile, "r")
>
>         valori = pickle.load(f)  ### Potrebbe generare una
>                                  ### eccezione 'KeyError'
>
>         larg_eti_val = max(map(len, valori))
>         n = len(miaApp.campi)
>         for i in range(n):
>           quadri_eti.append(None)
>           eti_campi.append(None)
>           eti_val.append(None)
>           quadri_eti[i] = Frame(quadro_grande)
>           quadri_eti[i].pack(side = TOP, expand = YES, fill = BOTH)
>           eti_campi[i] = Label(
>             quadri_eti[i],
>             text = miaApp.campi[i] + ": ",
>             width = larg_eti_campi,
>             anchor = E
>             )
>           eti_campi[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>           eti_val[i] = Label(
>             quadri_eti[i],
>             text = valori[i],
>             anchor = W,
>             width = larg_eti_val,
>             relief = SUNKEN
>             )
>           eti_val[i].pack(side = LEFT, pady = 5, padx = 10, fill = X)
>         self.chiudi = Button(self.quadro_pulsanti)
>         self.chiudi.configure(
>           text = "Chiudi",
>           command = self.premuto_chiudi
>           )
>         self.chiudi.pack(side = LEFT, expand = YES)
>
>       except KeyError:  ### Eventualmente generato da
>                         ### 'pickle.load()'
>
>         import tkMessageBox
>
>         tkMessageBox.showwarning(
>           "Bad input",
>           "Illegal values, please try again"
>           )
>         self.destroy()
>
>       f.close()
>
>   def premuto_chiudi(self):
>     self.destroy()
>
> radice = Tk()
> radice.wm_title("Versione Python di un programma Java di G. Renda")
> radice.wm_iconname("giuseppe")
> radice.minsize(400, 300)
> miaApp = MiaApp(radice)
> radice.mainloop() 




From wangtianthu at gmail.com  Mon Apr  4 15:58:38 2005
From: wangtianthu at gmail.com (Tian)
Date: 4 Apr 2005 12:58:38 -0700
Subject: How to execute a cmd line program without invoking console
	window?
In-Reply-To: <4249ff13.25767301@news.oz.net>
References: <1112131435.480120.89400@g14g2000cwa.googlegroups.com>
	<4249ff13.25767301@news.oz.net>
Message-ID: <1112644718.515511.104150@f14g2000cwb.googlegroups.com>

this is very useful, thanks very much!



From radam2 at tampabay.rr.com  Mon Apr  4 23:53:20 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 03:53:20 GMT
Subject: Unexpected result when comparing method with variable
References: <mailman.1351.1112672042.1799.python-list@python.org>
Message-ID: <2m24511f4642f553fpqj6ptn7qn95imihq@4ax.com>

On Mon, 4 Apr 2005 23:34:41 -0400, David Handy
<david at handysoftware.com> wrote:

I'm not sure if this is the best way. But it might work.


for method, params in deferred:
    method(*params)
	try:
        if method.im_func is c.f.im_func:
            # handle a special case
    except:
        if method is c.f:
            # handle a special case



Cheers,
Ron



From rdm at rcblue.com  Sun Apr 17 07:40:54 2005
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 17 Apr 2005 04:40:54 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <7xr7h9sq30.fsf@ruckus.brouhaha.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
	<Vmp8e.66673$Ze5.4755611@phobos.telenet-ops.be>
	<mailman.2019.1113729837.1799.python-list@python.org>
	<7xr7h9sq30.fsf@ruckus.brouhaha.com>
Message-ID: <6.2.1.2.2.20050417042523.0541cd60@rcblue.com>

Paul Rubin wrote at 02:35 4/17/2005:
>Dick Moores <rdm at rcblue.com> writes:
> > >C:\cygwin\bin\bc -l > pi12.txt
> >
> > But how or when do you enter the lines
> >
> > scale = 3000
> > obase = 12
> > print 4 * a(1)
>
>You could put them into a file, say pi.bc.  Then run
>   bc -l pi.bc

OK, now that I've got Textpad trained to open .bc files, I'm thinking of 
things to store in them. I'm sure I'll want to put in some remarks as 
well. What should I use to mark the remarks. "#", "//", or what?

The bc man page at <http://www.rt.com/man/bc.1.html> is tough. Any 
suggestion for more easily understandable help?

And finally (maybe), is it possible to employ bc within a Python script?

Thanks,

Dick





From bokr at oz.net  Fri Apr  1 22:49:45 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 02 Apr 2005 03:49:45 GMT
Subject: [Newbie] Search-and-delete text processing problem...
References: <0eadnS8Lk5Aaa9DfRVn-gw@speakeasy.net>
Message-ID: <424e0845.73296935@news.oz.net>

On Fri, 1 Apr 2005 17:33:59 -0800, "Todd_Calhoun" <anon at anon.com> wrote:

>I'm trying to learn about text processing in Python, and I'm trying to 
>tackle what should be a simple task.
>
>I have long text files of books with a citation between each paragraph,
Most text files aren't long enough to worry about, but you can avoid
reading in the whole file by just iterating, one line at a time. That is
the way a file object iterates by default, so there's not much to that.

>which might be like "Bill D. Smith, History through the Ages, p.5".
>
>So, I need to search for every line that starts with a certain string (in 
>this example, "Bill D. Smith"), and delete the whole line.
If you want to test what a string starts with, there's a string method for that.
E.g., if line is the string representing one line, line.startswith('Bill') would
return True or False.
>
>I've tried a couple of different things, but none seem to work.  Here's my 
>latest try.  I apologize in advance for being so clueless.
>
>##########################
>#Text search and delete line tool
>
>theInFile = open("test_f.txt", "r")
>theOutFile = open("test_f_out.txt", "w")
>
>allLines = theInFile.readlines()
This will create a list of lines, all (except perhaps the last, if
the file had no end-of-line character(s) at the very end) with '\n'
as the last character. There are various ways to strip the line ends,
but your use case doesn't appear to require it.

>
>for line in allLines:
     # line at this point contains each line successively as the loop proceeds,
     # but you don't know where in the sequence you are unless you provide for it,
     # e.g. by using
 for i, line in enumerate(allLines):
>    if line[3] == 'Bill':
The above line is comparing the 4th character of the line (indexing from 0) with 'Bill'
which is never going to be true, and will raise an IndexError if the line is shorter than
4 characters. Not what you want to do.
     if line.startswith('Bill'):  # note that this is case sensitive. Otherwise use line.lower().startswith('bill')

>        line == ' '
         the enumerate will give you an index you can use for this, but I doubt if you want and invisible space
         without a line ending in place of 'Bill ... \n'
         line[i] = '\n'  # makes an actual blank line , but you want to delete it, so this is not going to work
>

>
>theOutFile.writelines(allLines)

UIAM (untested) you should be able to do the entire job removing lines that start with 'Bill' thus:

 theInFile = open("test_f.txt", "r")
 theOutFile = open("test_f_out.txt", "w")
 theOutFile.writelines(line for line in theInfile if not line.startswith('Bill'))

Or just the line

 open("test_f_out.txt", "w").writelines(L for L in open("test_f.txt") if not L.startswith('Bill'))

If you need to remove lines starting with any name in a certain list, you can do that too, e.g.,

 delStarts = ['Bill', 'Bob', 'Sue']
 theInFile = open("test_f.txt", "r")
 theOutFile = open("test_f_out.txt", "w")
 for line in theInFile:
     for name in delStarts:
         if line.startswith(name): break
     else: # will happen if there is NO break, so line does not start with any delStarts name
         theOutFile.write(line) # write line out if not starting badly
 
(You could do that with a oneliner too, but it gets silly ;-)

If you have a LOT of names to check for, it could pay you to figure a way to split off the name
from the fron of a lines, and check if that is in a set instead using a delStart list.
If you do use delStart, put the most popular names at the front.

>#########################
>
>I know I could do it in Word fairly easily, but I'd like to learn the Python 
>way to do things.
Have fun.
>
>Thanks for any advice. 
>
HTH (nothing tested, sorry ;-)

Regards,
Bengt Richter


From fredrik at pythonware.com  Sun Apr 24 14:28:30 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 20:28:30 +0200
Subject: opening new window in one window using Tkinter -- Help please
References: <1114365774.690048.280150@l41g2000cwc.googlegroups.com>
Message-ID: <d4go6i$j1v$1@sea.gmane.org>

"Clara" wrote:

> I meant to write an application where there is a button in a window and
> when you click on the button, it will open a new window, but I want the
> first window to close, replaced by the second window.
> I open a login window and start the mainloop, when the user click on
> the login button, the __call__ function of VerifyProcessor is executed
> and it will call the new window which is the file manager window
> The thing is,.. I don't know how to exit the first mainloop and then
> display the second window...I even tried calling the mainloop again but
> a weird thing happens. I really need help because otherwise I'm stuck
> here and I can't complete my assignment. The following is my code:

you don't really have to start a new mainloop to create a new toplevel
window.  just call "withdraw" on first window, and create the second
(as a Toplevel), and Tkinter will take care of the rest.

</F>





From fredrik at pythonware.com  Sun Apr 24 07:37:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 13:37:54 +0200
Subject: Object oriented storage with validation (was: Re:
	Cachingcompiled regexps across sessions (was Re: Regular
	Expressions- Python vs Perl))
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com><d48ktk$4ov$1@news.vcd.hp.com><RMmdnRLDlZu6fPrfRVn-rQ@telcove.net><mailman.2250.1114119969.1799.python-list@python.org><m3sm1jbfek.fsf@iny.iki.fi><du7sm1j6uzc.fsf@mozart.cc.tut.fi><m3u0lzm5q1.fsf@iny.iki.fi><roy-F93E58.08375122042005@reader1.panix.com><m3oec6c056.fsf@iny.iki.fi><mailman.2289.1114190176.1799.python-list@python.org><m3k6muaxmi.fsf@iny.iki.fi><du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi><m3ekd0vd6i.fsf_-_@iny.iki.fi>
	<d4fv2r$mu5$1@sea.gmane.org>
Message-ID: <d4g04p$p6m$1@sea.gmane.org>


> > At least the interface looks quite simple and usable. With some
> > validation wrapping over it, it might be ok...
>
> I was going to point you to a validating parser for ET, but the "it might
> be ok" statement is a bit too arrogant for my taste.

I'll point you all to *two* validating parsers for ET instead:

    http://online.effbot.org/2005_02_01_archive.htm#elementrxp
    http://codespeak.net/lxml/

</F>





From simon.dahlbacka at gmail.com  Thu Apr 28 08:41:15 2005
From: simon.dahlbacka at gmail.com (Simon Dahlbacka)
Date: Thu, 28 Apr 2005 12:41:15 +0000 (UTC)
Subject: How do I parse this ? regexp ? [slighly OT]
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
	<pan.2005.04.27.17.49.30.308584@jerf.org>
Message-ID: <loom.20050428T143844-523@post.gmane.org>


> >>> safetyChecker = re.compile(r"^[-\[\]0-9,. ]*$")

..doesn't the dot (.) in your character class mean that you are allowing
EVERYTHING (except newline?)

(you would probably want \. instead)

/Simon




From fredrik at pythonware.com  Sat Apr 23 06:51:00 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 23 Apr 2005 12:51:00 +0200
Subject: Question Regarding PIL and PhotoImage classes
References: <1114249756.229138.204300@l41g2000cwc.googlegroups.com>
Message-ID: <d4d91l$1s3$1@sea.gmane.org>

Harlin Seritt wrote:

> Why is that I can only get the PhotoImage class to show up when I write
> a straight procedural script (no object orientation) but not when I try
> to use object-orientation?
> 
> These two scripts in theory should produce the same results but they
> don't. Is there any reason why?

in the second example, the "photo" variable is garbage-collected when the
method returns.

see the note on this page for more info:

    http://effbot.org/zone/tkinter-photoimage.htm

</F>



From tim at tt1lock.org  Sun Apr 24 05:03:26 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Sun, 24 Apr 2005 09:03:26 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
	<IFEpEp.7Gz@bath.ac.uk>
	<mailman.2346.1114273424.1799.python-list@python.org>
Message-ID: <IFG15q.1LC@bath.ac.uk>

Mage <mage at mage.hu> wrote or quoted:
> Tim Tyler wrote:
> >Mage <mage at mage.hu> wrote or quoted:

> >>check this: http://wiki.w4py.org/pythonvsphp.html
> >
> >Good - but it hardly mentions the issue of security - which seems
> >like a bit of a problem for PHP at the moment.
>
> I don't think so. Bad programmers are able to write bad programs in any
> language. Maybe there are more bad php programmers than python
> programmers and the 70% of the dynamic world wide web is copied from
> user comments in the php.net/manual. However one of the worst cases is
> the sql injection attack. And sql injections must be handled neither by
> php nor by python but by the programmer.

SQL injection "only" gives you access to the database and its contents.

A bigger problem in practice for PHP at the moment is the way
fopen can allow access to the entire filing system.

That does things such as allowing trivial programming mistakes to expose 
the unix password file to attackers - exposing not just the particular 
site's database - but all users on the maching (on machines not using 
shadow passwords) with passwords subject to dictionary and brute force 
attacks.

The current defense involves switching off fopen - but unfortunately,
that rather cripples many PHP programs.
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From bug-gs-beta at ghostscript.com  Mon Apr  4 21:00:37 2005
From: bug-gs-beta at ghostscript.com (bug-gs-beta at ghostscript.com)
Date: Mon, 4 Apr 2005 18:00:37 -0700
Subject: hello
Message-ID: <20050405013855.9882D1E4006@bag.python.org>

The message contains Unicode characters and has been sent as a binary attachment.


From phil_nospam_schmidt at yahoo.com  Fri Apr  8 11:50:20 2005
From: phil_nospam_schmidt at yahoo.com (phil_nospam_schmidt at yahoo.com)
Date: 8 Apr 2005 08:50:20 -0700
Subject: Rotating arbitrary sets of elements within a list
References: <1112971150.361681.313100@o13g2000cwo.googlegroups.com>
Message-ID: <1112975420.828248.137300@g14g2000cwa.googlegroups.com>

phil_nospam_schmidt at yahoo.com wrote:
> I'm trying to come up with a good algorithm to do the following:
>
> Given a list 'A' to be operated on, and a list 'I' of indices into
'A',
> rotate the i'th elements of 'A' left or right by one position.



Ok, here's what I've got. It seems to work right, but can it be
improved upon?

def list_rotate(A, I, direction=1):
    A1 = [A[i] for i in I]
    A2 = [A[i] for i in range(len(A)) if i not in I]
    if direction:
        I1 = [(i-1)%len(A) for i in I]     # rotate left
    else:
        I1 = [(i+1)%len(A) for i in I]     # rotate right
    I2 = [i for i in range(len(A)) if i not in I1]
    for i in range(len(I1)): A[I1[i]] = A1[i]
    for i in range(len(I2)): A[I2[i]] = A2[i]



From osv at javad.ru  Thu Apr 21 07:48:47 2005
From: osv at javad.ru (Sergei Organov)
Date: 21 Apr 2005 15:48:47 +0400
Subject: goto statement
References: <mailman.2158.1113989043.1799.python-list@python.org>
	<dqCdneMCDr764fvfRVn-tA@powergate.ca> <426767FD.5050104@i.com.ua>
Message-ID: <d483v0$ch1$1@n6.co.ru>

Maxim Kasimov <kasimov at i.com.ua> writes:

> 1. comment for debug
> 
>     It can be used in the same way, as the comments for debugging are
>     used, but it will be easier than to use """ or ''', or using
>     features of text-editors, when it is necessary to comment piece of
>     code which already contains ''' or/and """ strings already, or
>     there is another #-comments. Using goto, you do not need to edit a
>     code, which is unfamiliar to you.

... and then you end up with situation when another goto jumps directly
into the body of the code you've just "commented" with your goto. Happy
debugging!

BTW, don't you want "comefrom" statement to be added to the language
to make debugging even more fun?

-- 
Sergei.


From peter at somewhere.com  Tue Apr 12 06:18:01 2005
From: peter at somewhere.com (Peter Maas)
Date: Tue, 12 Apr 2005 12:18:01 +0200
Subject: Programming Language for Systems Administrator
In-Reply-To: <du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
	<du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
Message-ID: <d3g80m$2k9$1@swifty.westend.com>

Ville Vainio schrieb:
> If you don't need to edit already existing system scripts, you don't
> really need to know bash scripting. For debugging purposes, it's easy
> to see what commands the script executes to perform a task.

This is only true for trivial bash scripts. I have seen bash scripts
which were quite hard to read especially for beginners.

-- 
-------------------------------------------------------------------
Peter Maas,  M+R Infosysteme,  D-52070 Aachen,  Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
-------------------------------------------------------------------


From peter at engcorp.com  Mon Apr 18 10:25:31 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 18 Apr 2005 10:25:31 -0400
Subject: accesing pages (or ranges of pages) via Reportlab
In-Reply-To: <pan.2005.04.18.14.20.35.385426@presidency.com>
References: <pan.2005.04.18.14.20.35.385426@presidency.com>
Message-ID: <LLOdnUSIq_L5Xv7fRVn-vg@powergate.ca>

Rajarshi Guha wrote:
> Hi, I've been using pdflatex to dump ranges of pages from a PDF file via
> Python. However, I was looking at the Reportlab toolkit and was wondering
> if this operation would be possible using this toolkit as well.
> 
> Admittedly, I have'nt read the documentation in detail, but I was
> wondering if anybody could provide any pointers to extracting pages from a
> PDF via Python without using pdflatex

I'm pretty sure there is a non-free library available
from the ReportLab folks that can do this.  (Googling
a bit...)  PageCatcher.  Check www.reportlab.com for more.


From cepl at surfbest.net  Tue Apr 26 23:39:07 2005
From: cepl at surfbest.net (Matej Cepl)
Date: Tue, 26 Apr 2005 23:39:07 -0400
Subject: PyKDE inside vim-python
Message-ID: <1199502.xyXDofJtgE@blahoslav.ceplovi.cz>

Hi,

did anybody tried %subj%? I have created really stupidly simple dialog-box
in Qt-designer (it is available on
<http://www.ceplovi.cz/matej/tmp/KDE-dialog.tar.gz>) and I would like to
run it from vim-script in kvim (soon to be obsoleted and replaced by
Gnome-vim; oh, well, I liked kvim). Of course I can do something like

        :let cat = system("categorySet.py")

but I thought that running the script directly from vim (with Python
scripting enabled) could make this script faster. Can anybody help me,
whether it is possible to do something like this?

Thanks,

        Mat?j

-- 
Matej Cepl, http://www.ceplovi.cz/matej
GPG Finger: 89EF 4BC6 288A BF43 1BAB  25C3 E09F EF25 D964 84AC
138 Highland Ave. #10, Somerville, Ma 02143, (617) 623-1488
 
Scouts are saving aluminum cans, bottles and other items to be
recycled. Proceeds will be used to cripple children.
      -- from a church bulletin


From theller at python.net  Tue Apr 12 12:45:40 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 12 Apr 2005 18:45:40 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
	<425AF2AB.1030401@v.loewis.de>
	<425b8948$0$38045$bed64819@news.gradwell.net>
	<d3gptd$jni$1@sea.gmane.org>
	<mailman.1776.1113323960.1799.python-list@python.org>
Message-ID: <4qec7xl7.fsf@python.net>

Dave Brueck <dave at pythonapocrypha.com> writes:

> Terry Reedy wrote:
>> If there is something about the default install of Python on Windows
>> that makes it less desireable or less easy than other platforms,
>> then maybe that can be fixed.  To make installation easier, maybe
>> someone could write a small .exe that could be frozen with scripts
>> or run with installers and that would detect the presence/absence of
>> the needed Python version and offer an auto download and install if
>> needed.
>
> I mostly agree with the sentiment, but it does break down a little in
> practice. At least currently it does - like you said, this is fixable,
> but nobody has signed up to fix it yet.
>
> The main thing that's needed is a zero-input Python distribution - a
> Python runtime, if you will - that (1) gets installed to a "good"
> place (2) does so without asking the user to do anything, (3) can
> coexist with different versions of the runtime, and (4) is easily
> detectable by applications wanting to use it.

The effbot.exe platform (or how it's called) ?

> One other minor component is a small launcher executable, because on
> Windows it's non-trivial to find out which "python.exe" in the task
> manager is running which Python script. Anyway, each app would have a
> small launcher that bootstraps the actual Python script[1]. (Or, if
> there's some way to trick the task manager into displaying something
> besides "python.exe", that'd work too)

exemaker?

Thomas


From gsakkis at rutgers.edu  Sat Apr 23 03:58:42 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 23 Apr 2005 00:58:42 -0700
Subject: Decorator pattern for new-style classes ?
Message-ID: <1114243122.753678.311960@l41g2000cwc.googlegroups.com>

Searching the archives for something related to the title, I found a
few relevant threads (e.g. http://tinyurl.com/avyg6 or
http://tinyurl.com/b5b6v); however they don't seem to give a
satisfactory answer, so here it goes again: What's the equivalent
new-style Delegate class ?

class Delegate:
    def __init__(self, principal):
        self._principal = principal

    def __getattr__(self,name):
        return getattr(self._principal,name)

    # overriden methods follow here

This delegates both normal and __special__ methods; unfortunately for
new style classes __getattr__ is not called for missing special
methods. The workarounds I saw or can think of are so ugly that I
prefer to to use an old-style class after a long time :-/

George



From dan.polansky at gmail.com  Fri Apr 22 03:52:36 2005
From: dan.polansky at gmail.com (Dan Polansky)
Date: 22 Apr 2005 00:52:36 -0700
Subject: To decode the Subject =?iso-8859-2?Q?=... in email in python
In-Reply-To: <42660779$0$226$edfadb0f@dread12.news.tele.dk>
References: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>
	<42660779$0$226$edfadb0f@dread12.news.tele.dk>
Message-ID: <1114156356.777232.211470@l41g2000cwc.googlegroups.com>

Max, thanks; that was helpful. Roman, your explanation was helpful as
well. Dan



From miki.tebeka at zoran.com  Mon Apr 25 07:37:05 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Mon, 25 Apr 2005 14:37:05 +0300
Subject: A smallish Tkinter question
In-Reply-To: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
References: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
Message-ID: <20050425113704.GJ3652@zoran.com>

Hello Nick,

> """
> What I want: A little window to open with a 0 in it. Every second, the
> 0 should increment by 1.
> What I get: A one second delay, see the window with a 1 in it, and then
> nothing appears to happen. Never see the 0, never see a 2.  Any quick
> clues? Thanks. Nick. (Python 2.4, Win98).
> """
Read: http://www.pythonware.com/library/tkinter/introduction/ and mainly
http://www.pythonware.com/library/tkinter/introduction/x9507-alarm-handlers-and-other.htm


from Tkinter import *

class Clock(Frame): #<<<
    def __init__(self, parent):
        Frame.__init__(self, parent) #<<<
        self.time = 0
        self.display = Label(parent)
        self.display["font"] = "Arial 16"
        self.display["text"] = str(self.time)
        self.display.pack()

    def run(self): #<<<
        self.loop()

    def loop(self): #<<<
        self.time = self.time + 1
        self.display["text"] = str(self.time)
        self.after(1000, self.loop)

win = Tk()
app = Clock(win)
app.run() #also tried run(win) with self,parent above
win.mainloop()

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From bokr at oz.net  Sat Apr 16 21:10:47 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 01:10:47 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<1113667629.375491.44380@l41g2000cwc.googlegroups.com>
Message-ID: <42618007.117284766@news.oz.net>

On 16 Apr 2005 09:07:09 -0700, "Kay Schluehr" <kay.schluehr at gmx.net> wrote:

>The idea is interesting but not unambigously realizable. Maybe one
>should introduce some extra syntax for disambiguation and thereby
>generalize the proposal.
This is intriguing. I am reminded of trailing "where x is something" phrase, but with
an implied x.
>
>as <specifier>:
>   # list of definitions and assignments
ISTM this list, other than for func, always could be considered to
generate an ordered sequence of (key, value) pairs that need to be plugged into
the preceding context. Where to plug it in is implicit, but it could be given
explicit target name(s) in an expression, e.g.,
     <expr> where: <where-suite>

and <where-suite> would be a series of assignments like for suite-based keywords, except that
the key names would be used in resolving the names in the expression preceding the where:, e.g.,
    foo(x, y) where:
        x = 1
        y = 2

would make the foo call using the where bindings by name, here effectively calling foo(1, 2) 
But sometimes we want all the bindings in a suite in a chunk, as with suite-based keyword bindings.

I'm proposing below a unary suite operator spelled '::' which will return a single tuple of 2-tuples
representing the ordered bindings produced by the statement suite following the '::' Thus ::<suite>
is a general expression that can be used anywhere an expression can be used. (I'll explain indentation rules).

The "::" expression I'm proposing generalizes capturing suite bindings into an ordered sequence of (key,value)
tuples, like an ordered vars().items() limited to the bindings produced in the suite following "::"
Thus
    items = ::
        x = 1
        y = [1,2]
        def foo():pass

    print items => (('x', 1), ('y', [1, 2]), ('foo', <function foo at 0x02EE8D14>))

Now we can use a :: expression in a where: spec, e.g.

    d = dict(items) where:
        items = ('added','value') + ::  # note that :: is a unary suite operator producing a tuple of tuples
            x = 1
            y = [1,2]
            def foo():pass

where: actually introduces a suite of scoped assignments much like ::  e.g.,
    d = {key:value} where: key='x'; value='123' # where is ;-greedy on the same line
    print d => {'x':123}

or a multi-parameter call
    foo(x, y=23, *args, **kw) where:
        x = 333; y = 555
        args = [44, 55, 66]
        kw = dict(::
           z = 'zee'
           class C(object): pass
           c = C()
           del C )

resulting in foo being called like foo(333, 555, 44, 55, 66, z='zee', c=C()) # except C was transiently defined


You can also use a :: expression directly, skipping the where: reference resolution mechanism, e.g.,

    d = dict(::
        x = 1
        y = [1,2]
        def foo():pass)  # closing bracket not opened in :: suite ends the suite like a sufficient dedent would

It can also participate as a normal expression anywhere a tuple of tuples could go, e.g.

    print list(t[0] for t in ::
        x = 1
        y = [1,2]
        def foo():pass)
    => ['x', 'y', 'foo']

Now we can rewrite some examples. Thanks for the inspiration to generalize/orthogonalize ;-)

>
>Proposed specifiers are dict, tuple, *, ** and func.
>
>
>-  as dict:
>
>   conversion into a dictionary
>
>   Example:
>
>   d = as dict:
>       doc = "I'm the 'x' property."
>       def fget(self):
>           return self.__x
    d = dict(items) where:
            items = ::
            doc = "I'm the 'x' property."
            def fget(self):
                return self.__x

Or more concisely

    d = dict(::
            doc = "I'm the 'x' property."
            def fget(self):
                return self.__x )

>
>   We would get d = {"doc":"I'm the 'x' property.", "fget":fget}
>
>
>-  as **:
>
>   conversion into keyword-arguments. This comes close in spirit to the
>   original proposal
BTW, this would happen to cover dict alternatively by way of your format
    d = dict():
       as **: key=value #etc
>
>   Example:
>
>   x = property():
>       as **:
>           doc = "I'm the 'x' property."
>           def fget(self):
>               return self.__x
>
    x = property(**kw) where:
            kw = dict(::
                doc = "I'm the 'x' property."
                def fget(self):
                    return self.__x)
or
    x = property(fget=fget, doc=doc) where:
                doc = "I'm the 'x' property."
                def fget(self):
                    return self.__x

>-  as tuple:
>
>   conversion into a tuple. Preserving order.
>
>   Example:
>
>   t = as tuple:
>           doc = "I'm the 'x' property."
>           def fget(self):
>               return self.__x
>   >>> t[1]
>   <function fget at 0x00EC4770>
"as tuple:" is special sugar for
    t = tuple(*v) where:
        v = (t[1] for t in ::
            doc = "I'm the 'x' property."
            def fget(self):
                return self.__x )

>
>
>-  as *:
>
>   conversion into an argument tuple. Preserving order.
That's the same as passing values to tuple above
>
>   Example:
>
>   x = property():
>       as *:
>           def get_x():
>               return self.__x
>           def set_x(value):
>               self.__x = value
>           del_x = None
>           doc   = "I'm the 'x' property."

    x = property(*seq) where:
            seq = (item[1] for item in ::
                def get_x():
                    return self.__x
                def set_x(value):
                    self.__x = value
                del_x = None
                doc   = "I'm the 'x' property." )

>
>
>
>-  as func(*args,**kw):
>
>   Anoymus functions. Replacement for lambda. Support for
>   arbirtray statements?
    I prefer dropping combinations of def and/or <name> from def <name>(<arglist>): <suite>
    to get

        def <name>(<arglist>): <suite>  # normal def
        def (<arglist>): <suite>        # anonymous def
        <name>(<arglist>): <suite>      # named callable suite, aka named thunk
        (<arglist>): <suite>            # anonymous callable suite, aka thunk

    any of which can be passed to a decorator or bound or passed to functions etc.

    The parsing of indentation for the three last definitions is like for the :: unary suite operator
    i.e., they are all expressions, not statements, and ::<suite> is an expression that ends where the
    <suite> ends, so there are some rules. The first is that a closing bracket not opened within the suite
    ends the suite. This is typically the closing paren of a function call, but could be anything, e.g.,
    print [:: x=123; y=456] => [(('x', 123), ('y', 456))] # ie the :: value is a single tuple of tuples.

    More typical would be the use of def(<arglist>):<suite> as a substitute for lambda <arglist>:<expr>

    BTW, note that :: is ;-greedy in a single-line multi-statement suite, so
        items = :: x=1; y=2  # => (('x',1), ('y',2))
    I.e., it has the effect of
        items = ::
            x = 1
            y = 2
    Not
        items == ::
            x = 1
        y = 2

    The same greediness goes for "where:"

>
>   Examples:
>
>   p = as func(x,y): x+y
>   p(1,2)

    p = def(x, y): x+y
>
>   i,j = 3,4
>   if (as func(x,y): x+y) (i,j) > 10:
>      print True

    if (def(x,y): x+y) (i,j) > 10:
       print true

I haven't thought of all the uses for anonymous callable suites (thunks), but imagine as callback:
(putting it as an unusual default parameter makes it bind in the same namspace as the definintion of foo)

    def foo(x, cb=(y):print y):
       cb(x)

    foo(3) # => prints 3 and assigns y=3 as local-to-foo-definer side effect (often main effect)

    foo(123, (z):print 'Setting z=%r'%z) => prints Setting z=123 and sets z=123 locally to foo caller.

    foo(456, lambda *ignore:None)  # also legal, foo doesn't know what callable it's being passed


The suite-based keyword call syntax

    foo():
        x = 1
        y = [1,2]
        def foo():pass

can be handled with the more general

    foo(**kw) where: kw = dict(::
        x = 1
        y = [1,2]
        def foo():pass)

This is a new rev on my thoughts. Expect contradictions with older stuff.
Naturally I like my newest ideas best ;-)

Regards,
Bengt Richter


From tjreedy at udel.edu  Sun Apr  3 18:13:42 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 3 Apr 2005 18:13:42 -0400
Subject: text analysis in python
References: <mailman.1255.1112523725.1799.python-list@python.org><1325i2-sd2.ln1@lairds.us>
	<424FF1CD.2040102@acm.org>
Message-ID: <d2ppna$jdp$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:424FF1CD.2040102 at acm.org...
>Say I code my  stuffs in Jython (importing java libraries) in a file 
>"text.py"

Just to be clear, Jython is not a separate langague that you code *in*, but 
a separate implementation that you may slightly differently code *for*.

>... Will there be any issues when I try to import text.py into CPython?

If text.py is written in an appropriate version of Python, it itself will 
cause no problem.  Hoqwever, when it imports javacode files, as opposed to 
CPython bytecode files, CPython will choke.

Terry J. Reedy





From rdm at rcblue.com  Thu Apr 14 22:06:55 2005
From: rdm at rcblue.com (Dick Moores)
Date: Thu, 14 Apr 2005 19:06:55 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <6.2.1.2.2.20050414183844.06302120@rcblue.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
	<d3kjb0$pk6$2@sea.gmane.org>
	<6.2.1.2.2.20050413200623.0568d1b0@rcblue.com>
	<425DFFCF.3020800@holdenweb.com>
	<6.2.1.2.2.20050414183844.06302120@rcblue.com>
Message-ID: <6.2.1.2.2.20050414184732.04b46530@rcblue.com>

Dick Moores wrote at 18:40 4/14/2005:
>Sorry about that. <http://www.kenjikojima.com/>

I just listened to Kojima's

"NEW
Chorus Pi (Japanese) / 2:28
Chorus: MacinTalk Voices. The music was created from the constant PI."

on that page. The vocal is singing the digits of base-10 pi.

ten is . or decimal point
zero is 0
inchi is 1
ni is 2
san is 3
ta? is 4 (don't understand that "ta" or "tan", but it must be 4)
go is 5
roku is 6 -- in the music 6 sounds like "raku"
nana is 7
hachi is 8
ku is 9

Take a look/listen to

"String Quartet Pi / 5:06 and the process of data
The music was created from the constant PI (3.141592.......) to 3,000 
decimal places by programming."

Lots of details there on the music.

Dick







From ivoras at fer.hr  Mon Apr 25 06:45:26 2005
From: ivoras at fer.hr (Ivan Voras)
Date: Mon, 25 Apr 2005 12:45:26 +0200
Subject: HTML cleaner?
In-Reply-To: <mailman.2433.1114417769.1799.python-list@python.org>
References: <d4h9uv$cge$1@bagan.srce.hr>
	<mailman.2433.1114417769.1799.python-list@python.org>
Message-ID: <d4ihp0$4sa$1@bagan.srce.hr>

M.-A. Lemburg wrote:

> Not true: mxTidy integrates tidy as C lib. It's not an interface
> to the command line tool.

Thanks, I'll look at it again!


From g.jullien at free.fr  Mon Apr  4 03:05:42 2005
From: g.jullien at free.fr (Guillaume JULLIEN)
Date: Mon, 04 Apr 2005 09:05:42 +0200
Subject: distutils
Message-ID: <4250E746.1080101@free.fr>

Hi,

New to python, I' m trying to use distutils.
And I get this error

# python setup.py build
Traceback (most recent call last):
   File "setup.py", line 89, in ?
     from distutils import core
ImportError: No module named distutils

I have Python 2.3.4 installed

Any advice ?
How does path work in python ?

Thanks a lot for your help

Guillaume


From reinhold-birkenfeld-nospam at wolke7.net  Sat Apr 16 04:39:46 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sat, 16 Apr 2005 10:39:46 +0200
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <3cc186F6lodv5U1@individual.net>

Brian Sabbey wrote:
> Here is a pre-PEP for what I call "suite-based keyword arguments". The 
> mechanism described here is intended to act as a complement to thunks. 
> Please let me know what you think.
> 
> Suite-Based Keyword Arguments
> -----------------------------
> 
> Passing complicated arguments to functions is currently awkward in Python. 
> For example, the typical way to define a class property winds up polluting 
> the class's namespace with the property's get/set methods.  By allowing 
> keyword arguments to be defined in a suite following a function call, 
> complicated arguments can be passed in a cleaner, easier way.
> 
> Examples
> ========
> 
> Using suite-based keyword arguments, the code
> 
> f(x = 1)
> 
> is equivalent to
> 
> f():
>     x = 1

Pretty cool, but it interferes with current suites.

How would you write

if f(x=1):
    print "yes"

using suite-based keyword args?

Reinhold


From sjmachin at lexicon.net  Sat Apr 23 22:57:53 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 24 Apr 2005 12:57:53 +1000
Subject: Unicode problems, yet again
References: <d4eruk$gns$1@bagan.srce.hr>
Message-ID: <171m61pido84fckea94h8231j8n077qt8k@4ax.com>

On Sun, 24 Apr 2005 03:15:02 +0200, Ivan Voras
<ivoras at something.ortheother> wrote:

>I have a string fetched from database, in iso8859-2, with 8bit 
>characters,

"8bit characters"?? Maybe you did once, or you thought you did, but
what you have now is a Unicode string, and socket.write() is expecting
an ordinary string.

> and I'm trying to send it over the network, via a socket:
>
>   File "E:\Python24\lib\socket.py", line 249, in write
>     data = str(data) # XXX Should really reject non-string non-buffers
>UnicodeEncodeError: 'ascii' codec can't encode character u'\u0161' in 
>position 123: ordinal not in range(128)

Like it says, you have passed it a *UNICODE* string that has u'\u0161'
(the small s with caron) at position 123.

>
>The other end knows it should expect this encoding, so how to send it?
>

If the other end wants an encoding, then you should *encode* it, like
this:


>>> us = u'\u0161'
>>> s = us.encode('iso8859_2')
>>> s
'\xb9'
>>> str(us)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0161' in
position 0: ordinal not in range(128)
>>> str(s)
'\xb9'
>>> # looks like socket.write() might be happier with this.

>(Does anyone else feel that python's unicode handling is, well... 
>suboptimal at least?)

Your posting gives no evidence for such a conclusion.




From prinster at mail.com  Thu Apr 28 05:47:13 2005
From: prinster at mail.com (Stephen Prinster)
Date: Thu, 28 Apr 2005 09:47:13 GMT
Subject: Question about python code distribution...
In-Reply-To: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
References: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
Message-ID: <Bi2ce.1649$Gd7.277@newssvr21.news.prodigy.com>

draghuram at gmail.com wrote:
> Hi,
> 
> I am sure that this question might have come up repeatedly. Companies
> may not want to distribute their python code in source form. Even
> though pyc files are one option, it gets inconvenient to distribute
> bunch of them . If there is some way to bundle pyc files (akin to
> .jar), it would be really nice. I understand that pyc files are not
> hard to decompile (from my reading of previous posts) and module
> startup times may be longer if they have to be read from an archive.
> Neverthless, an option to distribute in the form of an archive is
> attractive. Has this ever been considered for Python? If one were to
> consider it, what would be pros and cons of such approach?
> 
> Any comments are appreciated.
> 
> Thanks,
> Raghu.
> 

Looks like it's in the works:
http://peak.telecommunity.com/DevCenter/PythonEggs

Cheers,
Steve


From eurleif at ecritters.biz  Fri Apr  1 00:07:12 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 01 Apr 2005 05:07:12 GMT
Subject: __init__ method and raising exceptions
In-Reply-To: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
References: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
Message-ID: <4G43e.540$bI3.55452@monger.newsread.com>

NavyJay wrote:
> I have a simple for-loop, which instantiates a class object each
> iteration.  As part of my class constructor, __init__(), I check for
> valid input settings.  If there is a problem with this iteration, I
> want to abort the loop, but equivalently 'continue' on in the for-loop.
> 
> I can't use 'break' or 'continue' in a class method, nor can I return a
> boolean value from __init__() to check for errors within the for-loop.
> How would I be able to stop the current iteration and continue with the
> next after reporting an error?

You have the right idea in the subject header: raise an exception. 
Something along the lines of this:

class Foo(object):
     def __init__(self, value):
         if value > 10:
             raise ValueError("Value must be under 10, was %s." % value)
         else:
             self.value = value

for value in [1, 4, 10, 7, 15, 13, 6, 3]:
     try:
         obj = Foo(value)
     except ValueError, ex:
         print str(ex)
         continue
     # Do stuff with obj here


From neuhauser+python-list#python.org at sigpipe.cz  Wed Apr 13 06:43:44 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Wed, 13 Apr 2005 12:43:44 +0200
Subject: Compute pi to base 12 using Python?
In-Reply-To: <6.2.1.2.2.20050413032011.04fb2d00@rcblue.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<6.2.1.2.2.20050413032011.04fb2d00@rcblue.com>
Message-ID: <20050413104344.GA15864@isis.sigpipe.cz>

# rdm at rcblue.com / 2005-04-13 03:27:06 -0700:
> Bengt Richter wrote at 03:19 4/13/2005:
> This is not homework, nor am I a student, though I am trying to learn 
> Python. I'm just trying to help an artist acquaintance who needs (I just 
> learned) the first 3003 digits of pi to the base 12.
> 
> >Hint: Lambert Meertens. Tweak the algorithm you find ;-)
> 
> Sorry. Your hint is beyond me.

    it says "use google".

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From radam2_ at _tampabay.rr.com  Sun Apr 17 21:24:47 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Mon, 18 Apr 2005 01:24:47 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
Message-ID: <3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>

On Sun, 17 Apr 2005 15:02:12 -0700, Brian Sabbey
<sabbey at u.washington.edu> wrote:

Brian Sabbey wrote:

> I'm kicking myself for the first example I gave in my original post in 
> this thread because, looking at it again, I see now that it really gives 
> the wrong impression about what I want thunks to be in python.  The 
> 'thunkit' function above shouldn't be in the same namespace as the thunk. 
> It is supposed to be a re-usable function, for example, to acquire and 
> release a resource.  On the other hand, the 'foo' function is supposed to 
> be in the namespace of the surrounding code; it's not re-usable.  So your 
> example above is pretty much the opposite of what I was trying to get 
> across.

This would explain why I'm having trouble seeing it then.


> def pickled_file(thunk, name):
>  	f = open(name, 'r')
>  	l = pickle.load(f)
>  	f.close()
>  	thunk(l)
>  	f = open(name, 'w')
>  	pickle.dump(l, f)
>  	f.close()
>
> Now I can re-use pickled_file whenever I have to modify a pickled file:
>
> do data in pickled_file('pickled.txt'):
>  	data.append('more data')
>  	data.append('even more data')
>
> In my opinion, that is easier and faster to write, more readable, and less 
> bug-prone than any non-thunk alternative.
>

The above looks like it's missing something to me. How does 'data'
interact with 'thunk(l)'?  What parts are in who's local space?  
	

This might be the non-thunk version of the above. 

def pickled_file(thunk, name):
 	f = open(name, 'r')
 	l = pickle.load(f)
 	f.close()
 	thunk(l)
 	f = open(name, 'w')
 	pickle.dump(l, f)
 	f.close()

def data_append(L):
	L.append('more data')
	L.append('still more data')

pickled_file(data_append, name)

I don't think I would do it this way.  I would put the data
list in a class and add a method to it to update the pickle file. Then
call that from any methods that update the data list.


>> def with_file:				# no argument list, local group.
>> 	f = open(filename)
>> 	t = callback(f)
>> 	f.close
>>
>> def my_read(f):
>> 	return f.read()
>>
>> callback = my_read
>> filename = 'filename'
>> do with_file
>
> This wouldn't work since with_file wouldn't be re-usable.  It also doesn't 
> get rid of the awkwardness of defining a callback.

As long as the name with_file isn't rebound to something else it could
be used as often as needed.  I admit there are better ways to do it
though.


Cheers,
Ron






From bill.mill at gmail.com  Tue Apr 19 07:44:08 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Tue, 19 Apr 2005 07:44:08 -0400
Subject: New Python regex Doc (was: Python documentation moronicities)
In-Reply-To: <20050419000731.GA10263@unpythonic.net>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
	<1113856843.023012.165500@l41g2000cwc.googlegroups.com>
	<20050419000731.GA10263@unpythonic.net>
Message-ID: <797fe3d4050419044469c80a16@mail.gmail.com>

On 4/18/05, Jeff Epler <jepler at unpythonic.net> wrote:
> On Mon, Apr 18, 2005 at 01:40:43PM -0700, Xah Lee wrote:
> > i have rewrote the Python's re module documentation.
> > See it here for table of content page:
> > http://xahlee.org/perl-python/python_re-write/lib/module-re.html
> 
> For those who have long ago consigned Mr. Lee to a killfile, it looks
> like he's making an honest attempt to improve Python's documentation
> here.

Alright, I feel like I'm feeding the trolls just by posting in this
thread. Just so that nobody else has to read the "revised" docs, no it
doesn't:

1) He didn't really change anything besides the intro page and
deleting the matching vs. searching page and the examples page. He
also put a couple of <hr> breaks into the doc.

2) notes like "NOTE TO DOC WRITERS: The doc sayz: ..." followed by the
same drum he's been beating for a while, instead of actually editing
the section to be correct.

3) adding "MAY NEED AN EXAMPLE HERE" instead of actually putting one in

> 
> Mr Lee, I hope you will submit your documentation changes to python's
> patch tracker on sourceforge.net.  I don't fully agree with some of what
> you've written (e.g., you give top billing to the use of functions like
> re.search while I would encourage use of the search method on compiled
> RE objetcts, and I like examples to be given as though from interactive
> sessions, complete with ">>>" and "..."), but nits can always be picked
> and I'm not the gatekeeper to Python's documentation.
> 

I'd suggest that he actually make an effort at improving the docs
before submitting them.

Peace
Bill Mill
bill.mill at gmail.com


From sabbey at u.washington.edu  Sun Apr 17 18:17:09 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sun, 17 Apr 2005 15:17:09 -0700
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <Pine.A41.4.61b.0504171403540.232474@dante76.u.washington.edu>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<cf052f0d.0504162206.129ccdbd@posting.google.com>
	<Pine.A41.4.61b.0504171403540.232474@dante76.u.washington.edu>
Message-ID: <Pine.A41.4.61b.0504171515550.232474@dante76.u.washington.edu>

Brian Sabbey wrote:
> Does anyone know if the 'where' keyword is only for readability (or does it 
> disambiguate the syntax in some situations)?  I think I prefer leaving it 
> off.

To answer my own question, I see by reading the where threads that using 
the 'where' keyword allows things such as:

# Design by contract (from Nick Coghlan)
@dbc(pre, post)
def foo():
    pass
with:
    def pre():
      pass
    def post():
      pass


From cam.ac.uk at mh391.invalid  Tue Apr 12 06:46:29 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Tue, 12 Apr 2005 11:46:29 +0100
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <d3g8u8$9pi$1@gemini.csx.cam.ac.uk>

I've had enough.

*PLONK*
-- 
Michael Hoffman


From ajikoe at gmail.com  Mon Apr 25 07:29:50 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 25 Apr 2005 04:29:50 -0700
Subject: Injecting code into a function
In-Reply-To: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <1114428590.248435.303730@o13g2000cwo.googlegroups.com>

use eval.
eval will accept any string and treat the string as a code.

pujo



From lbates at syscononline.com  Mon Apr 25 09:44:27 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 25 Apr 2005 08:44:27 -0500
Subject: Changing a line in a text file
In-Reply-To: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
Message-ID: <ct2dndVc4Ku4afHfRVn-tw@comcast.com>

You might be able to use "edge" case to make this simple.

1) If the line you are replacing is unique in the file

and

2) File can easily fit in memory

you can write:

fp=open(filename, 'r')
contents=fp.read()
fp.close()
newcontents=newline.join(contents.split(line2))
fp=open(filename, 'w')
fp.write(newcontents)
fp.close()

For small files this is very efficient.

Larry Bates


kah wrote:
> How do I change a line in a file??
> 
> For example I have the follwing text in my file:
> 
> line1
> line2
> line3
> line4
> 
> How do I replace 'line2' with 'newline'. Since the write operation in
> python will  overwrite everything.
> 
> Regards,
> Kah
> 


From simon.brunning at gmail.com  Wed Apr 20 11:24:19 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Wed, 20 Apr 2005 16:24:19 +0100
Subject: goto statement
In-Reply-To: <70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
Message-ID: <8c7f10c6050420082456e5a759@mail.gmail.com>

On 4/20/05, Christos TZOTZIOY Georgiou <tzot at sil-tec.gr> wrote:
> If you need more help, I would gladly send you the output of `man vi'
> from a non-GNU Unix.  I can also send you the output of `man vim' from a
> GNU system.

It'll probably be easier to convince Guido to introduce a 'goto'
statement than it would be to learn vi.

I'm really not sure if I'm joking or not.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From nid_oizo at yahoo.com_removethe_  Sat Apr 16 15:54:44 2005
From: nid_oizo at yahoo.com_removethe_ (Nicolas Fleury)
Date: Sat, 16 Apr 2005 15:54:44 -0400
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <mailman.1997.1113635188.1799.python-list@python.org>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>	<42607b0f$1_2@newspeer2.tds.net>
	<mailman.1997.1113635188.1799.python-list@python.org>
Message-ID: <F1e8e.57771$gJ1.1813045@weber.videotron.net>

Shane Hathaway wrote:
> I like this PEP a lot, but your concern is valid.  Maybe Brian could
> modify the PEP slightly to disambiguate.  How about using an ellipsis in
> the argument list to signify suite-based keywords?  Examples:
> 
> f(...):
>     x = 1
> 
> class C(object):
>    x = property(...):
>       doc = "I'm the 'x' property."
>       def fget(self):
>          return self.__x
>       def fset(self, value):
>          self.__x = value
>       def fdel(self):
>          del self.__x
> 
> d = dict(...):
>     a = 1
>     b = 2
> 
> Using an ellipsis in a statement that would begin a different kind of
> block is illegal and generates a syntax error.  Note that this usage
> seems to fit well with the definition of "ellipsis".
> 
> http://dictionary.reference.com/search?q=ellipsis
> 
> Shane

I like the ellipsis syntax a lot, it greatly helps the proposal IMHO.

Regards,
Nicolas


From james at wrong.nu  Fri Apr 22 16:14:19 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Fri, 22 Apr 2005 21:14:19 +0100
Subject: gui developing
In-Reply-To: <42694FDD.1070908@hathawaymix.org>
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<200504222027.40280.james@wrong.nu>
	<42694FDD.1070908@hathawaymix.org>
Message-ID: <200504222114.23749.james@wrong.nu>

On Friday 22 April 2005 20:26, Shane Hathaway wrote:

> > The killer, of course, is that there's no free windows port, so if you're
> > doing free software that you want to run on linux then you're stuffed.
>
> That situation is about to change: Qt 4 for Windows will be available
> under the GPL.
>
> http://www.trolltech.com/newsroom/announcements/00000192.html

Ah - I did know that, but I thought that it was Q4 2005, not Q2 2005, so 
didn't bother mentioning it. That's excellent news!

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From mediocre_person at hotmail.com  Thu Apr 21 11:14:24 2005
From: mediocre_person at hotmail.com (mediocre_person at hotmail.com)
Date: 21 Apr 2005 08:14:24 -0700
Subject: A smallish Tkinter question
Message-ID: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>

"""
What I want: A little window to open with a 0 in it. Every second, the
0 should increment by 1.
What I get: A one second delay, see the window with a 1 in it, and then
nothing appears to happen. Never see the 0, never see a 2.  Any quick
clues? Thanks. Nick. (Python 2.4, Win98).
"""

from Tkinter import *
from time import sleep

class Clock:
    def __init__(self, parent):
        self.time = 0
        self.display = Label(parent)
        self.display["font"] = "Arial 16"
        self.display["text"] = str(self.time)
        self.display.pack()

    def run(self): #also tried self,parent
        sleep(1.0)
        self.time = self.time + 1
        self.display["text"] = str(self.time)

win = Tk()
app = Clock(win)
app.run() #also tried run(win) with self,parent above
win.mainloop()



From mart.franklin at gmail.com  Tue Apr 19 15:37:20 2005
From: mart.franklin at gmail.com (Martin Franklin)
Date: Tue, 19 Apr 2005 20:37:20 +0100
Subject: The value of the entry widget doesn't get updated
In-Reply-To: <ea0a4a1a.0504190736.1490276b@posting.google.com>
References: <ea0a4a1a.0504190736.1490276b@posting.google.com>
Message-ID: <d43mdk$hia$1@sea.gmane.org>

Clara wrote:
> Hi, can somebody help me,..I have an assignment due next week but now
> I'm stuck with this problem....
> I tried to get values from entry widget using the
> widgetcontrolvariable.get(),..but it seems that it won't work....
> I can't print the value I input in the entry widget...However when I
> first set the value to something I can get the value just fine...
> This is my code
> Help please...
> 
> msg='*~*Please Login to use the system*~*'
> class LoginMenu(Frame):
> 	
> 	def createWidgets(self, msg):
> 		import tkFont
> 		self.x = StringVar()
> 		self.y = StringVar()	
> 		self.x.set("Type here") 
> 		self.messageLabel= Label(self, text=msg, pady=15,
> font=tkFont.Font(weight='bold' ,size=10))
> 		self.messageLabel.grid(row=0, columnspan=6)
> 		self.nameLabel= Label(self, text='UserName  :', padx=12,
> justify=LEFT)
> 		self.nameLabel.grid(row=1, column=0, ipadx=9, ipady=5)
> 		self.nameEntry= Entry(self,justify=LEFT, textvariable=self.x)
> 		self.nameEntry.grid(row=1, column=3, columnspan=2)
> 		self.nameEntry.update_idletasks()
> 		self.passLabel= Label(self, text='Password   :', padx=12,
> justify=LEFT)
> 		self.passLabel.grid(row=2, column=0,ipadx=9, ipady=5)
> 		self.passEntry= Entry(self,justify=LEFT, show='*',
> textvariable=self.y)
> 		self.passEntry.grid(row=2, column=3, columnspan=2)
> 		self.passEntry.update_idletasks()
> 		self.loginButton = Button(self, text='Login', command =
> VerifyProcessor(self.x.get(), self.y.get()) )


Here is the problem, the values of the two entries have been got'on
before the button is pressed and the command is called.

I would replace the above with:-

VerifyProcessor(self.x, self.y)) )

and see below for the changes to the command callback class


> 		self.loginButton.grid(row=4, column=3, ipadx=15, ipady=3, pady=20)
> 		self.quitButton = Button(self, text='Exit', command = self.quit) 
> 		self.quitButton.grid(row=4, column=4, ipadx=20, ipady=3, pady=20,
> padx=10)
> 
> 	def __init__(self, msg, master=None):
> 		Frame.__init__(self, master)
> 		self.grid(column=4, row=4)
> 		self.createWidgets(msg)
> 
> class VerifyProcessor:
> 
> 	def __init__(self, thename, thepass):
> 		self.username = thename
> 		self.password = thepass
> 
> 	def __call__(self):
> 		print self.username
> 		print self.password

		print self.username.get()
		print self.password.get()



> 
> app = LoginMenu(msg)
> app.master.title("Login Menu")
> app.master.maxsize(280,200)
> app.mainloop()


HTH
Martin



From cam.ac.uk at mh391.invalid  Mon Apr 25 15:47:31 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 25 Apr 2005 20:47:31 +0100
Subject: Pickle an image?
In-Reply-To: <mailman.2486.1114456860.1799.python-list@python.org>
References: <mailman.2486.1114456860.1799.python-list@python.org>
Message-ID: <d4jhgp$49i$1@gemini.csx.cam.ac.uk>

GMane Python wrote:

>   I have a ( list | tuple | dictionary ) with several graphics in it.
> Trying to cPickle it to a file, I get errors.  For instance,
> UnpickleableError: Cannon pickle <type 'ImagingCore'> objects.
> 
>   Anyone know of a way to get around this?  I'd like to pickle a list or
> dictionary of about 5 .JPG images.

Have you tried converting the image objects to strings and back?
-- 
Michael Hoffman


From mal at egenix.com  Mon Apr 25 04:29:27 2005
From: mal at egenix.com (M.-A. Lemburg)
Date: Mon, 25 Apr 2005 10:29:27 +0200
Subject: HTML cleaner?
In-Reply-To: <d4h9uv$cge$1@bagan.srce.hr>
References: <d4h9uv$cge$1@bagan.srce.hr>
Message-ID: <426CAA67.8090503@egenix.com>

Ivan Voras wrote:
> Is there a HTML clean/tidy library or module written in pure python? I
> found mxTidy, but it's a interface to command-line tool.

Not true: mxTidy integrates tidy as C lib. It's not an interface
to the command line tool.

> What I'm searching is something that will accept a list of allowed tags
> and/or attributes and strip the rest from HTML string.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Apr 25 2005)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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


From mauriceling at acm.org  Thu Apr 28 03:57:22 2005
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 28 Apr 2005 17:57:22 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org> <426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
	<426fdea1$0$31536$9b622d9e@news.freenet.de>
	<d4p4hn$rea$1@domitilla.aioe.org>
	<427067a2$0$27765$9b622d9e@news.freenet.de>
Message-ID: <42709762.9030603@acm.org>

Martin v. L?wis wrote:
> Maurice LING wrote:
> 
>>I've emailed to catelog-sig mailing list and is still waiting to hear
>>something. Currently, I have no idea of the structure of PyPI. I hope I
>>can hear from them soon and generate some starting points...
> 
> 
> Posting questions is not the only way to find answers. The source code
> of PyPI is available: sf.net/projects/pypi.
> 
> Regards,
> Martin


I've browsed the source codes of PyPI in sf.net, nothing pops up as very 
useful to me... I reckoned that sitting in here or hoping for replies 
from catelog-sig isn't going to help much.

On that, I've prototyped a very simple proof-of-concept of what I have 
in mind, regarding a Fink-like tool for Python's 3rd party libraries 
management. Please bear in mind that this is a proof-of-concept 
prototype, really bare bones. It can be found in 'centipyde' module in 
sf.net/projects/ib-dwb. In case the CVS hadn't updated by the time 
someone reads this, the directory layout is this:

../centipyde
../centipyde/centipyde.py
../centipyde/pgkinfo
../centipyde/pgkinfo/ply15.info


ply15.info contains the following text (pretty much modelled against Fink):

package=ply15
maintainer=.
dependencies=.
downloadurl=http://systems.cs.uchicago.edu/ply/ply-1.5.tar.gz
prebuildscript=tar zxvf ply-1.5.tar.gz
sourcedir=ply-1.5
buildscript=python setup.py build
installscript=sudo python setup.py install


centipyde.py is the following:
=====================================================

"""
Author: Maurice H.T. Ling <mauriceling at acm.org>
Copyright (c) 2005 Maurice H.T. Ling
Date created : 28th April 2005
"""

PKGINFOPATH = 'pkginfo'
INSTALL_LOG = 'install.log'

import os
import string
import sys

def install_package(package_name):
     f = open(os.getcwd() + os.sep + PKGINFOPATH + os.sep + package_name 
+ '.info', 'r')
     install_info = {}
     for line in f.readlines():
         line = string.split(line, '=')
         if line[1][-1] == os.linesep:
             install_info[line[0]] = string.strip(line[1][:-1])
         else: install_info[line[0]] = string.strip(line[1])
     f.close()
     print "Package Installation Information: " + str(install_info)

     os.system('curl -O ' + str(install_info['downloadurl']))

     preinstall = []
     preinstall = string.split(install_info['prebuildscript'], ';')
     for cmd in preinstall: os.system(cmd)

     cwd = os.getcwd()
     print cwd
     os.chdir(os.path.join(os.getcwd(), install_info['sourcedir']))
     print os.getcwd()

     buildscript = []
     buildscript = string.split(install_info['buildscript'], ';')
     for cmd in buildscript: os.system(cmd)

     installscript = []
     installscript = string.split(install_info['installscript'], ';')
     for cmd in installscript: os.system(cmd)


if sys.argv[1] == 'install':
     install_package(sys.argv[2])

=====================================================

When I run "python centipyde.py install ply15", PLY1.5 gets downloaded 
from David Beazley's website, uncompressed and installed into the 
site-package.

All comments and code donations are welcomed.

Cheers
Maurice


From bschollnick at gmail.com  Wed Apr 20 18:52:06 2005
From: bschollnick at gmail.com (Benjamin Schollnick)
Date: 20 Apr 2005 15:52:06 -0700
Subject: SSL via Proxy (URLLIB2) on Windows gives Unknown Protocol error?
Message-ID: <1114037526.714732.320080@l41g2000cwc.googlegroups.com>

Folks,

With Windows XP, and Python v2.41 I am running into a problem....

The following code gives me an unknown protocol error.... And I am not
sure how
to resolve it...

I have a API written for DocuShare for a non-SSL server, and I wanted
to update it
to support the SSL/S3 login....

So here's the SSL test code, and I can't get the page to retrieve....

        import urllib2
        proxy_handler = urllib2.ProxyHandler({'http':
'http://www.wb.xerox.com:8000',
                                              'https':
'http://www.wb.xerox.com:8000'})

        request =
urllib2.Request(url="https://www.docushare.xerox.com")#+server_url)
        request.set_proxy( "www.wb.xerox.com:8000", "https")


        stream = urllib2.urlopen( request )

        print '\n'.join(stream.readlines())

        sys.exit(5)

The error is:

urllib2.URLError: <urlopen error (1, 'error:140770FC:SSL
routines:SSL23_GET_SERVER_HELLO:unknown protocol')>

As far as I can tell the Python 2.41 MSI bundle includes the SSL code?

C:\develope\docushare>python
Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> print socket.ssl
<function ssl at 0x00BC95B0>

Anyone have any suggestions?

         - Ben



From grzegorz at ece.ualberta.ca  Tue Apr 19 15:31:57 2005
From: grzegorz at ece.ualberta.ca (Grzegorz Dostatni)
Date: Tue, 19 Apr 2005 15:31:57 -0400
Subject: Python dtrace
Message-ID: <Pine.LNX.4.44.0504191527210.11662-100000@e5-05.ee.ualberta.ca>


I am wondering if there is anyone else as excited about Sun's dtrace
as I am. Having seen it in action, and actually used it a couple of times
I am really impressed.

Still, this is not meant as an advert for Sun. I am considering doing some
work at adding Dtrace probes into python. That would only apply on Solaris
10 right now (of course). I am intersted in what people think about that.
Good, bad, indifferent?

Greg

"When I give a lecture, I accept that people look at their watches,
 but what I do not tolerate is when they look at it and raise it to
 their ear to find out if it stopped."
	- Marcel Achard




From martin at v.loewis.de  Tue Apr 19 01:13:57 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 19 Apr 2005 07:13:57 +0200
Subject: EasyDialogs module problem with python 2.4.1
In-Reply-To: <UFZ8e.1069056$6l.754056@pd7tw2no>
References: <C4S8e.1063265$Xk.1017278@pd7tw3no>
	<%fS8e.1066640$6l.831254@pd7tw2no>
	<42641956$0$21477$9b622d9e@news.freenet.de>
	<UFZ8e.1069056$6l.754056@pd7tw2no>
Message-ID: <42649395.7070601@v.loewis.de>

scott wrote:
> Can I get this Pyshell behavior using python from the terminal?

One application is "active" at any point in time, and this application
controls the menu, has its windows displayed, and so on. So when the
Terminal.app is active, Python cannot be.

Now, it may be possible to programmatically change the active
application, but I don't know how.

Regards,
Martin


From fouff at fouff.com  Tue Apr  5 02:18:02 2005
From: fouff at fouff.com (Fouff)
Date: Tue, 05 Apr 2005 08:18:02 +0200
Subject: copying a file in the python script
In-Reply-To: <1112678460.464474.82610@z14g2000cwz.googlegroups.com>
References: <1112678460.464474.82610@z14g2000cwz.googlegroups.com>
Message-ID: <42522dbf$0$15090$636a15ce@news.free.fr>

Raghul a ?crit :
> hi
>    I am having a problem. I want to copy a file from the folder and
> paste it or move it to another folder. Is it possible in python?
> Actually I need to implement this in the zope for my site. When I click
> any file it should move or copied to another folder in the same machine
> using zope.
> 
> Thanks in advance.
> 
Hello.

try this :

import shutil
shutil.copyfile(srcfile, dstfile)

if you want to move, just use this after
import os
os.remove(srcfile)

Bye
Fouff


From mahs at telcopartners.com  Sat Apr 16 17:04:51 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 16 Apr 2005 14:04:51 -0700
Subject: pythonic use of properties?
In-Reply-To: <5e183f3d05041507417d3fa81d@mail.gmail.com>
References: <5e183f3d05041420053ecd0ee@mail.gmail.com>	<d3nf2n$fm5$1@sea.gmane.org>
	<5e183f3d05041507417d3fa81d@mail.gmail.com>
Message-ID: <d3ruea$61s$1@sea.gmane.org>

Marcus Goldfish wrote:

> 
> So what do you consider when making this decision

Python style tends away from validating what doesn't need to be validated.  The 
argument seems to be that the additional validating code comes at the price of 
legibility, and perhaps flexibility.

It's common in Python to use public attributes - even though an irresponsible 
user could set an object to a harmful or meaningless state.

Instead, the Python mantra is that it is 'better to ask forgiveness than 
permission', i.e., to handle exceptions gracefully rather than trying to avoid them.

One form of validation that is particularly discouraged in Python is type-checking.

That said, of course there are cases where data must be validated.  For data 
stored in one type, and used in many contexts - I would validate where stored. 
If the reverse, then validate at the point it is used.  In the likely case of 
'somewhere in between these extremes', personal taste and project conventions.


> and do these factors differ between python and C#/Java?
> 

I have rarely used C#, and never Java.

C#'s strongly typed method signatures imply a contract to act properly on 
objects passed to the method.  Given this, it seems sensible to me to include 
data validation in the source object.

Python's lack of type-checking of callable arguments invites the use of 'duck 
types'.  On the margin, I think, this argues for putting data validation at the 
point where the data is used, rather than when it is stored.


Michael



From mauriceling at acm.org  Thu Apr 21 01:37:27 2005
From: mauriceling at acm.org (Maurice LING)
Date: Thu, 21 Apr 2005 15:37:27 +1000
Subject: Embedding & Extending Python &other scripting languages
References: <tommy.nordgren-8162EF.06201721042005@amstwist00.chello.com>
Message-ID: <42673C17.5030805@acm.org>

Hi Tommy,

After reading what you've written, it is still very vague for me. Is it 
a program that reads a specification and outputs the corresponding codes 
in the langauge you want?

Cheers
Maurice

Tommy Nordgren wrote:

> I'm interested in doing a rather ambitious project concerning compiler
> construction tools. 
> My tools will parse specification files containing for example lalr
> parser specifications.
> The specifications will contain embedded semantic actions which i want to
> allow writing in any object-oriented language.
> The specifications will name a scripting language and a target language 
> module . Then my tool will create an embedded interpreter for the 
> scripting language, which will load a target language module written in 
> the scripting language, and use it to generate code in the target 
> language.
> 
> I want to provide my system as open source.
> 
> Now my basic problem is how to find what scripting languages are 
> installed on a users system, and generate the necessary makefiles 
> automatically. I will be using swig for interface creation.
> I want to support at least perl and python, with target language support 
> for at least java and c++ initially.
> 
> I probably want to support codegenerators written in ruby and tcl as 
> well.
> 
> Any help would be appreciated.
> 
> I prefer email replies to <tommy.nordgren at chello.se>
> 
> 
> Stockholm, April 21, 2005
> Tommy Nordgren


From mart.franklin at gmail.com  Tue Apr 12 16:53:00 2005
From: mart.franklin at gmail.com (Martin Franklin)
Date: Tue, 12 Apr 2005 21:53:00 +0100
Subject: Northampton, UK
In-Reply-To: <1113315607.375554.171070@f14g2000cwb.googlegroups.com>
References: <1113315607.375554.171070@f14g2000cwb.googlegroups.com>
Message-ID: <d3hc9g$m6m$1@sea.gmane.org>

Fuzzyman wrote:
> Just on the off chance.... I thought I'd ask if there were any
> Pythoneers out there local to Northampton UK ?
> 
> Best Regards,
> 
> Fuzzy
> http://www.voidspace.org.uk/python
> 

I'm just over the border (Bedfordshire) but like a lot of
people commute :-(



From jdc at uwo.ca  Wed Apr 13 14:32:12 2005
From: jdc at uwo.ca (Dan Christensen)
Date: Wed, 13 Apr 2005 14:32:12 -0400
Subject: preallocate list
In-Reply-To: <797fe3d4050413061618086ba@mail.gmail.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
	<797fe3d40504130611dbf2ffe@mail.gmail.com>
	<797fe3d4050413061618086ba@mail.gmail.com>
Message-ID: <87pswy5xzn.fsf@uwo.ca>

Bill Mill <bill.mill at gmail.com> writes:

> Bill Mill <bill.mill at gmail.com> writes:
>
>> I would profile your app to see that it's your append which is taking
>> ages, but to preallocate a list of strings would look like:
>> 
>> ["This is an average length string" for i in range(approx_length)]

I don't think there's any point putting strings into the preallocated
list.  A list is just an array of pointers to objects, so any object
will do fine for preallocation, no matter what the list will be used for.

>> My guess is that it won't help to preallocate, but time it and let us
>> know. A test to back my guess:
>> 
>> import timeit, math
>> 
>> def test1():
>>     lst = [0 for i in range(100000)]
>>     for i in xrange(100000):
>>         lst[i] = math.sin(i) * i
>> 
>> def test2():
>>     lst = []
>>     for i in xrange(100000):
>>         lst.append(math.sin(i) * i)

...

> The results change slightly when I actually insert an integer, instead
> of a float, with lst[i] = i and lst.append(i):
>
> 09:14 AM ~$ python test.py
> time1: 3.352000
> time2: 3.672000

If you use

      lst = range(100000)

or even better

      lst = [None]*100000

then test1 is more than twice as fast as test2:

time1: 2.437730
time2: 5.308054

(using python 2.4).

Your code

     lst = [0 for i in range(100000)]

made python do an extra 100000-iteration loop.

Dan


From steven.bethard at gmail.com  Wed Apr 20 17:15:01 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 20 Apr 2005 15:15:01 -0600
Subject: Define Constants
In-Reply-To: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>
References: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>
Message-ID: <P9adnRiLC9HJW_vfRVn-rQ@comcast.com>

codecraig wrote:
> Hi,
>   I have a question about how to define constants.
> 
>   My directory structure looks like...
> 
> C:\
>     --> abc.py
>     --> utils
>         --> __init__.py
>         --> CustomThing.py
> 
>   Ok, CustomThing looks like...
> 
> TOP = 0
> LEFT = 1
> 
> class CustomThing:
>     def __init__(self):
>         self.foo = "foo"
> 
> 
> 
>   so, from abc.py I have
> 
> from utils.CustomThing import CustomThing
> 
> print CustomThing.TOP
> 
> but i get an error: AttributeError: class 'CustomThing' has no
> attribute 'TOP'
> 
> How can I access those??

Note that TOP and LEFT are delcared in the *module* CustomThing, not the 
*class* CustomThing which is what you get if you do

     from utils.CustomThing import CustomThing # the *class*

You should probably write your code as something like:

     import utils.CustomThing
     print utils.CustomThing.TOP

and if you need to use the class, write:

     t = utils.CustomThing.CustomThing() # create a new CustomThing

Also, if you've just started this, it might be worth checking out 
PEP8[1] which suggests that modules "should have short, lowercase names, 
without underscores".  If you're stuck with such a long module name, you 
might try:

     import utils.CustomThing as thing
     print thing.TOP
     t = thing.CustomThing()

STeVe

[1]http://www.python.org/peps/pep-0008.html


From greg at cosc.canterbury.ac.nz  Wed Apr 20 01:39:08 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Wed, 20 Apr 2005 17:39:08 +1200
Subject: How to get a Function object from a Frame object
In-Reply-To: <nYWdnTAtyqHqbv7fRVn-hg@comcast.com>
References: <mailman.2054.1113843979.1799.python-list@python.org>
	<nYWdnTAtyqHqbv7fRVn-hg@comcast.com>
Message-ID: <3cm889F6lms8sU1@individual.net>

Steven Bethard wrote:
> Gigi wrote:
> 
>> I need access to a function object that corresponds to a frame object 
>> in a certain case from inside the function.
>
> Can you look up the code's co_name in the previous frame's locals?
> 
> You probably also need to check the previous frame's globals...  And 
> there are probably some cases where this code still wouldn't work...

Note that in general it's impossible to tell exactly
which function object was involved, since there could
be more than one function object sharing the same code
object, and the frame only references the code object.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From fritoj at netscape.net  Fri Apr  1 13:41:00 2005
From: fritoj at netscape.net (coffeebug)
Date: 1 Apr 2005 10:41:00 -0800
Subject: numeric module
In-Reply-To: <l9udnTOH3bYvEtDfRVn-vA@comcast.com>
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
	<l9udnTOH3bYvEtDfRVn-vA@comcast.com>
Message-ID: <1112380860.693533.158060@l41g2000cwc.googlegroups.com>

I cannot import "numarray" and I cannot import "numeric" using python
2.3.3

Where would I find an equivalent definition for zeros()?

Anyway, is there supposed to be something that sets the value of
elements of tbl to values other than zero? Not that the question has
anything to do with  Shama's problem (recognizing tbl as a
two-dimensional array).



From hancock at anansispaceworks.com  Fri Apr 22 19:35:04 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 18:35:04 -0500
Subject: Python logos
In-Reply-To: <1114193528.576352.162680@z14g2000cwz.googlegroups.com>
References: <1114193528.576352.162680@z14g2000cwz.googlegroups.com>
Message-ID: <200504221835.04479.hancock@anansispaceworks.com>

On Friday 22 April 2005 01:12 pm, Adomas wrote:
> this question has nothing to do with Python syntax,
> or libraries, however...
> 
> I'm looking for the so well-known python logo -- not
> the boring "Python Powered", but the image of small
> snake. However, the only such I could found was 32x32
> or alike (windows icon size.)
> 
> Does anybody know where could I find a better-resolution
> image, or yet better SVG/EPS?

AFAIK, there is no such logo which is "official".  
Especially since the original author (GvR) did not mean a 
snake at all. But there are several different unofficial 
versions which can be found.  I'd try using Google's image 
search.

You might try restricting it to the list archives, I'm not 
sure whether Google will chase the links, but some people
did post their own artwork for this just late last year or 
thereabouts, if I remember.

Good luck,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From jfj at freemail.gr  Wed Apr  6 11:54:33 2005
From: jfj at freemail.gr (jfj)
Date: Wed, 06 Apr 2005 18:54:33 +0300
Subject: Calling a Perl Module from Python
In-Reply-To: <mailman.1439.1112804698.1799.python-list@python.org>
References: <20050406025357.85585.qmail@web20708.mail.yahoo.com>
	<mailman.1439.1112804698.1799.python-list@python.org>
Message-ID: <42540639.4090204@freemail.gr>

Swaroop C H wrote:


> AFAIK, there isn't any reliable way to call Perl modules from Python.
> 
> 

pyperl. pyperl. pyperl.

+10 on making this a standard module for embrace+extend reasons
*and* because perl is not that bad after all.


jf





From steve at holdenweb.com  Fri Apr  8 18:29:24 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 18:29:24 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36r76$692$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>	<78f6595afdb48aabb9c72dfe549a543e@upf.edu>	<d36mds$l3q$1@sea.gmane.org>	<d36n3h$n0s$1@sea.gmane.org>
	<d36r76$692$1@sea.gmane.org>
Message-ID: <d370et$jp1$1@sea.gmane.org>

jeremit0 wrote:
> Steve Holden wrote:
> 
>> jeremit0 wrote:
>>
>>> harold fellermann wrote:
>>>
>>>> file.readlines() returns a list of lines. You can either call find 
>>>> on each
>>>> element in this list, like:
>>>>
>>>> for line in myfile.readlines() :
>>>>     if line.find('my particular string') :
>>>>         do_something()
>>>>
>>> I had thought that may be the only way to do it, I was hoping for 
>>> something simpler as I wrote earlier.
>>> Thanks for your help,
>>> Jeremy
>>>
>> If you want line numbers,. of course, then you can use
>>
>>   for linenum, line in enumerate(myfile.readlines()):
>>       ...
>>
>> Remember that true to Python's philosophy numbering will start at zero.
>>
> Is this any better than:
> 
>     lines = myfile.readlines()
>     for linenum in xrange(len(lines)):
>         # Do stuff with lines[linenum] ...
> 
Only if, as I said, you want line numbers ...

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From tjreedy at udel.edu  Thu Apr 21 18:41:06 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 18:41:06 -0400
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
Message-ID: <d499th$ane$1@sea.gmane.org>


"codecraig" <codecraig at gmail.com> wrote in message 
news:1114092105.964664.211430 at l41g2000cwc.googlegroups.com...

>  I am interested in regular expressions and how Perl and Python
> compare.  Particulary, I am interested in performance (i.e. speed),
> memory usage, flexibility, completeness (i.e. supports simple and
> complex regex operations...basically is RegEx a strong module/library
> in Python?)

Depending upon you particular application, 'completeness' may be a more 
relevant concern than 'performance'.  I believe the original Python regex 
engine did not have all the Perl extensions, some of them decidedly 'non 
regular'.  It was replace by the 'perl-compatible regex engine' (pcre or 
pre), written in C by a non-pythonista so that other 
languages/applications, like Python, could drop it in and have what the 
title claimed -- perl-like re capability.  The current sre engine was 
locally written to include unicode, with the re syntax unchanged (? or 
nearly so) from the pre.  So I would say that the answer to your last 
question of 'yes'.

Terry J. Reedy





From steve at holdenweb.com  Fri Apr  1 18:58:59 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 01 Apr 2005 18:58:59 -0500
Subject: [python-perl] Translation review?
In-Reply-To: <fefcdfb7.0503312300.5477345c@posting.google.com>
References: <fefcdfb7.0503312300.5477345c@posting.google.com>
Message-ID: <d2kn53$kfo$1@sea.gmane.org>

Traceback (most recent call last):
   File "<stdin>", line 19, in ?
IOError: [Errno 2] No such file or directory: '<stdin>'

(in both Windows 2.4 and Cygwin 2.4)

regards
  Steve

TSO wrote:
> Hi there,
> 
> 
> 
> I've recently tried to translate some Perl code into Python - code is below.
> 
> 
> Is there a more Pythonic form?
> 
> 
> Also, is there a good reason why there are plans to remove lambda from the language?
> 
> 
> yrs complements-of-the-season-ly...
> 
> 
> 
> 
> 
> 
> ==== START OF CODE
> 
> 
> 
> 
> 
> 
> 
> 
> ## 2005-04-01 - TSO
> ## with apologies to Erudil
> 
> import sys,math;[
> 
> 
>                                            vars()
>                                        .__setitem__(
>            "ham",                  lambda(spam):("").
>        join([chr((               spam/144**i)%(02*72))
>   for(i)in  xrange(             int(math.log(spam**0.5,
> 12)+1))])),[(lambda*           spam:globals().update({}
> .__class__([spam])))(        ham(spam),eval(ham(__spam))
>  )for(spam,__spam)in[      (47631497714,0x3A305499C7D37),
>         (47159984399,    2337674),(327499859,2336509),(8901
>        +34553*10000,   2402179),(6303405375459,2295612),(11+
>       7540504603011,  303839094),(95,2295612),(7540504603011,
>      303839094),(95,0x16241495E6D60314676F55F45E4D3F906),(216*
>      10529,0x1053924DE35309345),(0x6DB401B64DC,0x262efd)]]and(_)
>      (ham(231280211),[bacon(spam,ham(0x65936781522))()for(spam)in
>       crispy(bacon(bacon((bacon(eggs,ham(0x1051936D9600B6F4F)))(0)
>       ,ham(6296985467094)),ham(390129778476214073077203)))]+[bacon(
>        ham(32),ham(48473858995))()]),_(ham(110),(lovely)(Spam(cheese
>         ,SPAM))),_(ham(231280211),[[int((lambda spam:bacon(bacon(ham
>          (32),ham(48473858995))(),ham(330651610))([ham(6961)[bacon((
>            spam),ham(+906698009388057))()]for(spam)in(spam)]))(spam+
>              spam_),2)for(spam,spam_)in(lambda(spam):[(spam)for(spam)
>                in(_spam)(spam[::2],spam[1::2])])(list(_spam(*spam)))]
>                   for(spam)  in(lambda(spam):list(_spam(spam[::2],spam
>                                 [1::2])))([(spam+ham   (32)*n)[:n]for(
>                                    spam)in(SPAM)        ])])or(Spam)((
>                                       bacon)(           bacon(eggs,ham
>                                                         (7233055643059
>                                                          )),ham(224343
>              +                                           11402701*10**
>              6+                                          30804988*10**
>               14)                                         ),[(spam)for
>               spam                                       in(_spam)(*[
>              (ham(                                       668732698837
>               )%(spam_                                  ,_spam),ham(
>                668732698                               *1000+837)%(
>                 _spam,spam_                           ))for(_spam,
>                  spam_)in(_spam)                    (*Spam(lambda
>                    (spam_,_spam):                   [bacon(bacon
>                      (ham(32),ham(                 0xB494463B3)
>                        )(),ham(610+               330651000))(
>                         [_spam[spam]for(spam)in(spam)[::spam_
>                          *-2+1]])for(spam)in(SPAM)],Ham([ham
>                           (0x40BA541813CECF0323A994C40AA00)
>                              ,ham(412853488783846916352+
>                                 20980637114201*10**21
>                                       )])))])])]
> 
> == END OF CODE


-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From David.Bear at asu.edu  Tue Apr 12 14:44:12 2005
From: David.Bear at asu.edu (David Bear)
Date: Tue, 12 Apr 2005 11:44:12 -0700
Subject: ipv4 class
Message-ID: <d3h4tu$s4l$1@news.asu.edu>

I was hoping to write some network utils and found an ipv4 class written 
by Keith Dart circa 1999. It doesn't work any longer under python 2.3. I 
think I found it on starship python and links to his web site point to a 
  non-functional server.

anyone know of a simple ipv4 class I might steal... Im mean use?



From spiralx at gmail.com  Thu Apr 14 08:51:08 2005
From: spiralx at gmail.com (James)
Date: Thu, 14 Apr 2005 13:51:08 +0100
Subject: A little request about spam
In-Reply-To: <d3fd6366050414054728665d7e@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
Message-ID: <7ee3dcd80504140551385ce25e@mail.gmail.com>

Yes - it's been like that for the last month or so now and it's quite
annoying, especially seeing as before it was working at near enough
100% accuracy.

On 4/14/05, mark hellewell <mark.hellewell at gmail.com> wrote:
> On 4/14/05, BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> > Please do not reply to spam. Replying to spam makes it much harder for
> > spam filters to catch all the spam or will produce very many false
> > positives. Atleast that's how gmail's filter works. And if you must
> > reply, please change the subject line.
> 
> Is anybody else finding that Gmails spam filter has started
> labelling a lot of python-list emails as spam? About 20
> python-list emails a day end up getting caught by their
> filter and I'm having to manually go in and mark them
> as "Not spam".
> 
> mark
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From kent37 at tds.net  Fri Apr 29 12:00:37 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 29 Apr 2005 12:00:37 -0400
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <d4tbib$cb9$1@news.tsystems.kiev.ua>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
	<d4tbib$cb9$1@news.tsystems.kiev.ua>
Message-ID: <427255b4$1_3@newspeer2.tds.net>

Maksim Kasimov wrote:
> Kent Johnson wrote:
>  > for line in open(path):
> the line of your example raise another question: opened file will be 
> read at once time, as method readlines() do, or it will be read line by 
> line as method readline() do.

It will be read line by line as readline() does.

> as far i know, it is depends on implementation of method "__iter__" of 
> the object that "open()" returns, so another question: where i can find 
> such an information (about how does such a functions works)?

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

Kent


From msoulier at gmail.com  Sun Apr 24 14:00:37 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Sun, 24 Apr 2005 14:00:37 -0400
Subject: Getting into Python, comming from Perl.
In-Reply-To: <426BDDB7.8010403@amplitudenet.pt>
References: <426BDDB7.8010403@amplitudenet.pt>
Message-ID: <fb6605670504241100498879a0@mail.gmail.com>

On 4/24/05, Miguel Manso <mmanso at amplitudenet.pt> wrote:
> I'm a programmer with 5 year of experience into Perl. I'm on that point
> where you resolve problems without thinking on HOW you'll do it with
> that language but only on the problem itself.

I code in perl and C all day. Python is a very nice escape for me.

> Since Perl 6 started I've been following it. The conclusion I have is
> they're making a whole new language and I'll have to learn it. This
> being said and, since I've to learn a new language, I've started
> thinking in a new language. I've noticed Python is getting more and more
> developers and many projects are being made.

Perl6 seems to be taking its best features from Python, so I'll just
cut through the middle-man. ;-)

> I've tryed to use python some times but I get frustrated very quick. I
> get myself many times needing to figure out how to loop through a list,
> declare an associative array, checking how to pass named parameters to
> functions, and simple things like that.
> 
> What I would like to know is if anyone had these problems and if you can
> share that experience with me. I'm trying to minimize my "frustration" :)

Sure, happens, but it happens with any new languages. Keep using it,
and you'll get over it.

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'


From jonathan.vance at gmail.com  Tue Apr 19 18:19:22 2005
From: jonathan.vance at gmail.com (Jonathan Vance)
Date: 19 Apr 2005 15:19:22 -0700
Subject: 1993 Van Rossum Python Web Robot
Message-ID: <1113949162.402493.68860@g14g2000cwa.googlegroups.com>

I am looking for a python robot that Van Rossum released with python
0.9.8.  It may have been the first web robot (see
http://www.webhistory.org/www.lists/www-talk.1993q1/0060.html).

I've had no luck finding the code for the robot or the 0.9.8 tarball.
Can anyone help me out?

Thanks.



From tbettio at transnorm.ch  Thu Apr 28 11:10:08 2005
From: tbettio at transnorm.ch (Tiziano Bettio)
Date: Thu, 28 Apr 2005 17:10:08 +0200
Subject: dynamically generating temporary files through python/cgi
In-Reply-To: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
References: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
Message-ID: <4270FCD0.2010107@transnorm.ch>

poisondart wrote:

>Is there a way to dynamically generate temporary files (such as an
>html, xml or text file) in Python?
>
>I'm not sure if I'm explaining myself clearly as I've no clue how to
>describe this mechanism. I've seen it on certain websites that will
>generate a file under certain parameters (through forms) that will
>dissapear (i.e. delete itself) after a specified amount of time. These
>files usually have some phony string for their filenames...like it's
>been md5 hashed or something.
>
>Is there a group of library functions that allow this? I imagine that
>if i manually go and allocate a bunch of timers to monitor files, it
>would be really expensive in load. Or perhaps is this a client-side
>mechanism?
>
>Thanks,
>- poisondart
>
>  
>
hi there

first of you could use the tempfile

import tempfile

tempfile.mktemp('.thefileendingudlike')

i never really studied the cgi capability of python but for example in 
php there is the posibility to serve a request with a mime formated 
response such as html, gif, pdf, and so on. so if u want to generate 
content dynamically u wouldn't need to store those files but generate 
and send em on request without having to destroy them later on..

hope this is helpful

cheers

tc


From tim.peters at gmail.com  Sat Apr 30 03:16:02 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 30 Apr 2005 03:16:02 -0400
Subject: Python Challenge ahead [NEW] for riddle lovers
In-Reply-To: <d4v1an$j7q$1@sea.gmane.org>
References: <d4u60o$akh$1@news2.netvision.net.il>
	<mailman.47.1114818531.14961.python-list@python.org>
	<3dg5isF6qe1nhU1@news.dfncis.de> <d4v1an$j7q$1@sea.gmane.org>
Message-ID: <1f7befae05043000165448b8d@mail.gmail.com>

[Mike Rovner]
> 3 IS wrong because if you use any not BIG letter after bodyguard on both
> sides, you get extra 'eCQQmSXK\n' which slow me down for 5 minutes.

Get rid of the newlines first.

On level 7, I'm not sure whether there's something more to do, or
whether I'm looking at a bug in how IE displays .png files.  Using
Windows is good practice in solving maddening riddles every day
<wink>.


From donmcdaniel2005 at yahoo.com  Thu Apr 28 13:11:45 2005
From: donmcdaniel2005 at yahoo.com (Donald L McDaniel)
Date: Thu, 28 Apr 2005 10:11:45 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
Message-ID: <#jF1aVBTFHA.3176@TK2MSFTNGP09.phx.gbl>

MC05 wrote:
> "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
> news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>>
>> 4) I doubt seriously whether God plays a guitar, since guitars are
>> made by men, for men.  His Son could theoretically play a guitar. Perhaps 
>> He does. Perhaps He doesn't.  Only the Father and His Holy
>> Angels know.
>
> So then Lucifer was a wicked bass player whose sex and drugs and rock
> n roll alientated the rest of the band and was fired?

1) Lucifer was an angel who rebelled against God, not a member of a human 
rock 'n roll band.
2) Since Lucifer is an angel, I doubt seriously whether he can play a bass 
guitar or other musical instrument. As I said in my last post, musical 
instruments are made by men for men, not angels.
3) Since Lucifer is an angel, he does not engage in sexual relations. 
(Christ tells us that angels don't engage in sexual relations by His Own 
Words.)
4) Drugs and rock 'n roll are created by men for men, not angels.  And the 
green plants of the Earth were created by a Gracious God for His beloved 
creations, the men of the Earth.
5) Lucifer was not a member of a rock 'n roll band.  He is a spirit, not a 
man.
6) While we are on the subject of rock 'n roll, any such band which contains 
horns is pure crap anyway (or seriously living in the dark ages).  Horns 
don't belong in rock 'n roll bands.  Rock 'n roll has advanced light-years 
beyond Elvis.  It is the 21st Century, not the 20th.

-- 
Donald L McDaniel
Please reply to the original thread,
so that the thread may be kept intact.
============================== 




From kay.schluehr at gmx.net  Sun Apr 10 05:50:05 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 10 Apr 2005 02:50:05 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <4258e5e6$0$3407$9b622d9e@news.freenet.de>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<4257BE8B.9080209@v.loewis.de>
	<1113120099.217977.192190@g14g2000cwa.googlegroups.com>
	<4258e5e6$0$3407$9b622d9e@news.freenet.de>
Message-ID: <1113126605.315861.44730@z14g2000cwz.googlegroups.com>

Martin v. L?wis wrote:

> That said, if the people who want a path object would get together
> and contribute one, the library could be extended. I don't know
> whether this would be an improvement, though - os.path could not
> go away for backwards compatibility, so users would now have *two*
> ways of dealing with path names.

That's true. But it indicates that the idea of a "standard library" or
"batteries included" approach in Python which collects the most common
and important computing ideas and expresses them in a mandatory
Pythonic implementation is beginning to die or at least changes it's
meaning into: an exposition library of the CPython interpreter which
remains clearly indispensable.

> I also think that one of the reasons why there isn't a path object
> in the standard library yet is that nobody who has written one in
> the past trusts his own code enough to make it "official". Jason
> Orendorff writes "I find it a joy to use, and I hope you will too."
> This is the standard open source attitude (and rightly so): if
> you don't like it, don't use it. This attitude could not be
> preserved anymore if this would be in the standard library (or
> else we would not have this discussion).

Jason Orendorff seems not to be the only one who finds it a "joy to
use".

> For a number of libraries added recently, I heard lots of complaints
> how terrible they are to use, including, in particular, the XML
> and logging libraries, and the Unicode type, and that "something
> else" is so much easier to use. Why is it that the authors of
> "something else" never contribute it to Python?

You have already given the arguments in Your discussion above. I
personally never use the standard-lib XML parser, but pyRXP/pyRXPU
which is fast, stores objects in pythonic list/tuple/dict structures
and provides access by lazy tagging, implemented in the small
xmlutils.py module which I extended for my own comfort. It dispenses
both the slow javaesque W3C-DOM parser implementation and the
statemachine oriented SAX. But has this module some place in the
standard-lib. No, because it promotes double implementation i.e. not
only one way to do it. And throwing away old stuff is impossible
because downwards incompatibilities. No one of these axioms can be
skipped for a standard lib. So almost everyone deals with cute 3-rd
party packages.

Regards,
Kay



From steve at holdenweb.com  Mon Apr 25 16:07:40 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 25 Apr 2005 16:07:40 -0400
Subject: Python or PHP?
In-Reply-To: <Xns96439421AE239castleamber@130.133.1.4>
References: <mailman.2419.1114383838.1799.python-list@python.org>	<4ef0f3a4.0504242339.56b0506d@posting.google.com>
	<Xns96439421AE239castleamber@130.133.1.4>
Message-ID: <d4jicj$fpj$1@sea.gmane.org>

John Bokma wrote:
> Alan Little wrote:
> 
> 
>>Steve Holden <steve at holdenweb.com> wrote:
>>
>>
>>>Your statement then becomes
>>>
>>>select * from foo where bar=1; drop table foo
>>>
>>>which is clearly not such a good idea.
>>
>>I'm sure Steve is very well aware of this and was just providing a
>>simple and obvious example, nevertheless it might be worth pointing
>>out that anyody who connects their web application to their database
>>as a user that has DROP TABLE privileges, would clearly be in need of
>>a lot more help on basic security concepts than just advice on
>>choosing a programming language.
> 
> 
> True. But how does it stop someone who uses inserts? (I exclude the case 
> inserts are not needed).
> 
> 
>>This goes back to the point somebody made earlier on in the thread -
>>many web applications can be implemented as fairly simple wrappers
>>around properly designed databases. "Properly designed" includes
>>giving some thought to table ownership and privileges.
> 
> 
> One should stop SQL injection always, no matter if the database takes care 
> of it or not. There is no excuse (like, yeah, but I set up the privileges 
> right) for allowing SQL injection, ever.
> 
Correct. If a thing can't go wrong, it won't.

In security several levels of defense are better than just one, so 
database authorization and SQL injection removal should be considered 
complimentary techniques of a "belt and braces" (US: "belt and 
suspenders") approach.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From jfj at freemail.gr  Mon Apr 25 05:18:20 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 25 Apr 2005 12:18:20 +0300
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <mailman.2430.1114408769.1799.python-list@python.org>
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
Message-ID: <426CB5DC.1050301@freemail.gr>

Robert Kern wrote:

> Mike Meyer wrote:
> 
>> Ok, we've added list comprehensions to the language, and seen that
>> they were good. We've added generator expressions to the language, and
>> seen that they were good as well.
>>
>> I'm left a bit confused, though - when would I use a list comp instead
>> of a generator expression if I'm going to require 2.4 anyway?

If you want a list right away you'd use a list comprehension.
  X =[i for i in something() if somethingelse()]
  random.shuffle(X)
  print x[23]

On the other hand it's generator expressions which should be used
only when the code can be written in as a pipe.  For example a filter
of a -otherwise- very long list:

   make_fractal_with_seed (x for x in range(100000000) if 
fibonacci_prime (x))


> 
> 
> Never. If you really need a list
> 
> list(x*x for x in xrange(10))
> 
> Sadly, we can't remove list comprehensions until 3.0.
> 

Why???
Then we should also remove:
  x=[] to x=list()
  x=[1,2,3] to x=list(1,2,3)

I think "list" is useful only:
1) to subclass it
2) to convert a list/tuple/string to a list, which is
done extremely fast.

But for iterators I find the list comprehension syntax nicer.


jfj



From sjuranic at gmail.com  Mon Apr 18 19:18:45 2005
From: sjuranic at gmail.com (Steve Juranich)
Date: Mon, 18 Apr 2005 16:18:45 -0700
Subject: Wrapping C++ Class Heirachy in Python
In-Reply-To: <d419gb$r67$1@pump1.york.ac.uk>
References: <d419gb$r67$1@pump1.york.ac.uk>
Message-ID: <56190b6c05041816186a84eaa2@mail.gmail.com>

On 4/18/05, Andrew Wilkinson <ajw140NO at spamyork.ac.uk> wrote:
> I'm trying to wrap a C++ class hierarchy with Python types and I'd like to
> maintain the hierarchy in the types. I'm fairly sure this is possible,
> isn't it?

Yes.

> Are there any documents explaining how to do this, the standard Python
> manual doesn't go into enough detail about creating types for this.

Amen.

> I've found the tp_base and tp_bases elements and I've set them to the base
> type object (and a tuple containing the base type object) before I call
> PyType_Ready but in Python the base class isn't recognised. Is there
> anything obvious I'm missing?

Well, I can't really recommend without seeing what you did (did you
remember the preceding "&" for the type struct?

Otherwise, I'd have to recommend Objects/unicodeobject.c in the Python
source as a reference for how to do this.

I've had a couple of questions about how to implement new types that I
posted to the list, and never got much help, so I started using the
Python source as a reference.  I've gotten most of what I needed to
know from there.

HTH
-- 
Steve Juranich
Tucson, AZ
USA


From steven.bethard at gmail.com  Sun Apr 17 22:24:41 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 17 Apr 2005 20:24:41 -0600
Subject: pre-PEP: Simple Thunks
In-Reply-To: <Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
Message-ID: <6-OdnYLN0M70h_7fRVn-3A@comcast.com>

Brian Sabbey wrote:
> used, but rarely is because doing so would be awkward.  Probably the 
> simplest real-world example is opening and closing a file.  Rarely will 
> you see code like this:
> 
> def with_file(callback, filename):
>     f = open(filename)
>     callback(f)
>     f.close()
> 
> def print_file(file):
>     print file.read()
> 
> with_file(print_file, 'file.txt')
> 
> For obvious reasons, it usually appears like this:
> 
> f = open('file.txt')
> print f.read()
> f.close()
> 
> Normally, though, one wants to do a lot more than just print the file. 
> There may be many lines between 'open' and 'close'.  In this case, it is 
> easy to introduce a bug, such as returning before calling 'close', or 
> re-binding 'f' to a different file (the former bug is avoidable by using 
> 'try'/'finally', but the latter is not).  It would be nice to be able to 
> avoid these types of bugs by abstracting open/close.  Thunks allow you 
> to make this abstraction in a way that is more concise and more readable 
> than the callback example given above:
> 
> do f in with_file('file.txt'):
>     print f.read()
> 
> Thunks are also more useful than callbacks in many cases since they 
> allow variables to be rebound:
> 
> t = "no file read yet"
> do f in with_file('file.txt'):
>     t = f.read()
> 
> Using a callback to do the above example is, in my opinion, more difficult:
> 
> def with_file(callback, filename):
>     f = open(filename)
>     t = callback(f)
>     f.close()
>     return t
> 
> def my_read(f):
>     return f.read()
> 
> t = with_file(my_read, 'file.txt')
> 

Definitely put this example into the PEP.  I didn't really understand 
what you were suggesting until I saw this example.  All the other ones 
you gave just confused me more.

>> When I see 'do', it reminds me of 'do loops'. That is 'Do' involves
>> some sort of flow control.  I gather you mean it as do items in a
>> list, but with the capability to substitute the named function.  Is
>> this correct?
> 
> I used 'do' because that's what ruby uses for something similar.  It can 
> be used in a flow control-like way, or as an item-in-a-list way.

Please spend some time in the PEP explaining why you chose the keywords 
you chose.  They gave me all the wrong intuitions about what was 
supposed to be going on, and really confused me.  I also got mixed up in 
when you were talking about parameters to the thunk, and when you were 
talking about parameters to the function that is called with the thunk 
as a parameter.

I'd also like to see you start with the full example syntax, e.g.:

     do <unpack_list> in <returnval> = <callable>(<params>):
         <code>

And then explain what each piece does more carefully.  Something like:

"""
When a do-statement is executed, first <callable> is called with the 
parameters <params>, augmented by the thunk object, e.g.

     do func(4, b=2):
         ...

would call

     func(thunk_obj, 4, b=2)

Next, the body of the function is executed.  If the thunk object is 
called, then <code> will be executed with the names in <unpack_list> 
bound to the objects with which the thunk was called, e.g.

     def func(thunk):
         thunk(1, y=2)
     do x, y, z=4 in func():
         print x, y, z

would call:

     func(thunk_obj)
         thunk(1, y=2)

and thus x, y and z would be bound to 1, 2 and 4 and the body of the 
thunk would be executed, printing "1 2 4".

The code in <callable> is then resumed, and the process is repeated 
until <callable> returns.  Note that this means that each additional 
call to the thunk object will cause another execution of <code>, with 
potentially different bindings for the names in <unpack_list>.

When the function finally returns, the return value will be bound to 
<returnval>, e.g.:

     def func(thunk):
         thunk()
         thunk()
         return True
     do r = func():
         print "thunk called"
     print r

would print "thunk called" twice as the body of the thunk is executed 
for each call to thunk() in func, and then would print "True" in the 
code following the do-statement.
"""

Not sure if I actually understood everything right, but you definitely 
need a much more throrough walkthrough of what happens with a thunk -- 
it's not clear at all from the current pre-PEP.

STeVe


From fumanchu at amor.org  Tue Apr  5 00:00:05 2005
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 4 Apr 2005 21:00:05 -0700
Subject: Web application toolkit recommendation?
Message-ID: <3A81C87DC164034AA4E2DDFE11D258E33986B1@exchange.hqamor.amorhq.net>

Stewart Midwinter wrote:
> I would like to take a stab at doing this in Python instead of PHP,
> but I'd like to hear from people who are familiar with both, or who
> have a good understanding of web application toolkits in Python. 
> Which is likely to be the least painful route?
> 
> I'm already using Snakelets for a private internet blog, and would use
> this if there were a database access module available.

There are many database access modules available. SQLObject
(http://sqlobject.org/) works well with web applications. If you like,
I've got one called Dejavu (http://www.aminus.org/rbre/python/) which
needs more use cases ;)

Or is there something special about webapps which you feel requires a
database module to be integrated with the app framework?


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org


From leacen at gmail.com  Sun Apr 10 07:45:04 2005
From: leacen at gmail.com (Lea.Cen)
Date: Sun, 10 Apr 2005 19:45:04 +0800
Subject: Python-list Digest, Vol 18, Issue 481
In-Reply-To: <20050330175131.BC9541E400C@bag.python.org>
References: <20050330175131.BC9541E400C@bag.python.org>
Message-ID: <2b612a3505041004454a8d7105@mail.gmail.com>

Who can give me Announcement of Wallop?

Sorry, I'm from china! Who can? Thank you!

From apardon at forel.vub.ac.be  Tue Apr 12 09:15:25 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 12 Apr 2005 13:15:25 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
Message-ID: <slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-12, Steve Holden schreef <steve at holdenweb.com>:
> Antoon Pardon wrote:
>> I have made a module derived from the Queue module deliverd
>> with python 2.3. I would like to make this module (called
>> tube) available for other people. However it is not clear
>> to me how I can do this in accordance with the python
>> license.
>> 
>> First of all it seems I have to make a sumary of how
>> my module differs from the original.
>> 
> That would seem to apply primarily because this is a derivative product 
> of a Python distribution. Therefore, your description could be limited 
> to "removed the rest of the distribution" followed by specific details 
> of your changes making Queue into tube.
>
>> Second it seems I have to include the following in
>> my code:
>> 
>>   "Copyright (c) 2001, 2002 Python Software Foundation;
>>    All Rights Reserved"
>> 
>> Do I understand correctly?
>> 
> I believe so.
>
>> Because I don't mind the first but I'm not so happy
>> with the second. Are there other things I have to
>> watch out for?
>> 
> Since the PSF copyrighted the original work from which you are deriving, 
> you have already agreed to do this in any distributed derived work:
>
>    http://www.python.org/2.3/license.html
>
> clearly says """provided, however, that PSF's License Agreement and 
> PSF's notice of copyright, i.e., "Copyright (c) 2001, 2002, 2003 Python 
> Software Foundation; All Rights Reserved" are retained in Python 2.3 
> alone or in any derivative version prepared by Licensee."""
>
> Should we wait until you publish tube and then remove *your* attribution 
> to claim the code as our own?

Oh I see, I just have to include that attribution, next to my own.
I somehow got the idea that I had to hand over my copyright to
the Python Software Foundation.

What licence can I use? Somewhere they say you can combine python
code with GPL code. Does that mean that the resulting code has
to have both the GPL license as the PSF license, as both seem
to want that derived work uses the same license.

-- 
Antoon Pardon


From griebel at konzept-is.de  Thu Apr 28 05:33:04 2005
From: griebel at konzept-is.de (Dr. Peer Griebel)
Date: Thu, 28 Apr 2005 11:33:04 +0200
Subject: Working with method-wrapper objects
In-Reply-To: <1830947848@web.de>
References: <1830947848@web.de>
Message-ID: <4270ADD0.603@konzept-is.de>

Peer Dr. Griebel wrote:
> I think I was a little bit unspecific in my last mail.
> 
> I would like to see some description about method-wrapper and
> wrapper_descriptor objects.  I dont' understand the following behaviour:
> 
> 
>>>>type([].__str__)
> 
> <type 'method-wrapper'>
> 
>>>>type(object.__str__)
> 
> <type 'wrapper_descriptor'>
> 
>>>>type(object().__str__)
> 
> <type 'method-wrapper'>
> 
>>>>import inspect
>>>>inspect.isroutine([].__str__)
> 
> False
> 
>>>>inspect.isroutine(object.__str__)
> 
> True
> 
>>>>inspect.isroutine(object().__str__)
> 
> False
> 
> Why has [].__str__ a different type than object.__str__?
> Why is object.__str__ a routine while object().__str__ not?
> 
> And one again my question: Can I extract some more information about a
> methed-wrapper object. E.g. can I somehow determine the arg spec?
> 
> Thanks
>   Peer

Isn't there anybody who has something to say about the issue?

I think it's not only a problem with inspect. It is aproblem about old 
style classes vs. new style classes. It seems that the support for new 
style classes is not complete (yet).

Some more investigation shows that also the module "types" is not 
universally usable. E.g. InstanceType is only usabel for instances of 
old classes. How do I test for instances of new classes?

Thanks
   Peer



From martin at v.loewis.de  Sat Apr  2 03:33:04 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 02 Apr 2005 10:33:04 +0200
Subject: Installing Python on a Windows 2000 Server
In-Reply-To: <CTm3e.2461$tI6.928@fe2.columbus.rr.com>
References: <CTm3e.2461$tI6.928@fe2.columbus.rr.com>
Message-ID: <424E58C0.4010807@v.loewis.de>

Mike Moum wrote:
> We have a central server array running Windows Server 2000 (I think 
> that's the right name; networking is not my specialty, but it's 
> definately Windows). Some of our workstations run Windows 2000; others 
> run Windows XP Pro. I would like to install Python on the server, and 
> run the application that I'll be developing from the workstations, 
> without having to install any Python components on the workstations 
> themselves. In other words, the Python executable, and the various 
> libraries, dll's, and what have you, as well as the application that I'm 
> developing, should all reside on the server. The only thing on the 
> workstations would be a shortcut to myapplication.py.

I would encourage you to try an "administrative" (or "network")
installation. On the server, run msiexec /a python-2.4.1.msi.
This will unpack the MSI file, and create a new one. You need
to make the resulting installation a network share.

Then, on each workstation, you install the msi file on the share,
and specify that you want to run Python from the network share.

This mode of installation is only available since Python 2.4, and
very few people are probably using it, but I'd like to hear whether
it works (it should, in principle).

Regards,
Martin


From fredrik at pythonware.com  Tue Apr 12 11:12:22 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 17:12:22 +0200
Subject: Extending an embeded Python
References: <RgQ6e.111644$Vf.4177209@news000.worldonline.dk>
Message-ID: <d3goam$e3t$1@sea.gmane.org>

Mikin von Flap wrote:

> PyObject* res0 = Py_InitModule( "stoneage", StoneAgeMethods );
> res1 = PyRun_SimpleString( "stoneage.log( \"test\" )\n" ); // FAIL
> res2 = PyRun_SimpleString( "log( \"test\" )\n" ); // FAIL
> res3 = PyRun_SimpleString( "print \"test\"\n" ); // OK
> Py_Finalize();

> This compiles without problems, but when I run it I can't use the "log"
> function. Result res0 is a non-null object.
> As far as I can understand the "Extending and Embedding the Python
> Interpreter" doc, res1 should work but it doesn't!

compare and contrast:

    C:\Python24>python
    Python 2.4 (#60, Nov 30 2004, 11:49:19)
    >>> stoneage.log("hello")
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    NameError: name 'stoneage' is not defined
    >>> sys.platform
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    NameError: name 'sys' is not defined
    >>> import sys
    >>> sys.platform
    'win32'

</F>





From beliavsky at aol.com  Tue Apr 12 08:11:08 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 12 Apr 2005 05:11:08 -0700
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
	<du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
Message-ID: <1113307867.975905.300380@l41g2000cwc.googlegroups.com>

Ville Vainio wrote:

> If you don't need to edit already existing system scripts, you don't
> really need to know bash scripting. For debugging purposes, it's easy
> to see what commands the script executes to perform a task.
>
> You just need to know about `backticks` and $ENV_VARS, but that's
more
> general Unix knowledge than actual shell scripting.
>
> So IMHO learning bash scripting might be a waste of time, and it
> should be learnt 'as you go' - i.e. if/when you eventually bump into
a
> problem where you need to be able to do bash scripting. There's the
> 'Unix romantic' movement that still thinks shell scripts are a good
> idea, but this is my .02EUR to point out that not everyone agrees
with
> them.

The simplest script is just a set of commands one could run from the
command line. One step above is learning how to pass arguments (for
cmd.exe in Windows, they are just %1, %2, etc.) and set variables. I
think every computer user, not just system administrators, show know
this much about the shell language of his OS, regardless of whether
it's Windows, Unix, or something else. On Windows I often see people
"mousing around" instead of getting things done faster from the command
line.

I actually like the Windows cmd language (it's an acquired taste), but
I have read it is going away in Windows Longhorn (WH). That's an
argument for writing more complicated scripts in Python. WH is supposed
to get a much better shell, called Monad, inspired by the philosophy of
Gottfried Wilhelm Leibniz :).

Between a low-level shell scripting language and a higher-level
language like Python, and intermediate level language such as Rexx
could be considered. Many IBM people swear by it.



From steve at holdenweb.com  Tue Apr 26 05:44:31 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 05:44:31 -0400
Subject: bytecode non-backcompatibility
In-Reply-To: <d4ktck$r9a$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org>	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<86wtqqm27r.fsf@guru.mired.org> <d4ktck$r9a$1@domitilla.aioe.org>
Message-ID: <d4l281$7uh$1@sea.gmane.org>

Maurice LING wrote:
> 
>> All you have to do is convince the developers to declare the set of
>> bytecodes fixed, and they'd be stable. I don't think that will be
>> easy, as it removes one of the methods used to improve the performance
>> of Python. Since rebuilding the bytecode files is trivial (just invoke
>> compileall.py in the library as a script), this isn't really a
>> problem. The only thing that breaks are modules that muck about inside
>> the bytecode. I don't know how much bytecode improvements have sped
>> things up, but I do know that if I ever used a module that mucked
>> around with byte codes, I wasn't aware of it - so this is a tradeoff
>> I'm more than happy to make.
>>
> 
> Thanks Mike,
> 
[... arguments about bytecode stability ...]
> 
> What other point are there?
> 
> I may be chopped by saying this but by having a stable set of bytecodes, 
> we may lose a means of optimization. But we may gain more from filling 
> the need for commerical distribution of applications writing in Python 
> and ease of upgrading...
> 
> At current stage, every time a new version of Python is installed in my 
> server or system, I have to test and ensure the needed libraries are 
> there... which may be a horror in corporate settings. Couple that with 
> messy dependencies of the libraries to be installed. I remembered the 
> time I was trying to install Eric 3, the dependencies makes me want to 
> give up... I have to install Qt, then pyQt, then something else, then 
> Eric3. Imagine you need 10 of those libraries... which may happen... I 
> am not yet masochistic enough to take pleasures in this...
> 
> I also hope some python developers are reading this thread as well...... 
>  Call this a desperate plea from some of us......
> 
> Cheers
> Maurice

There's enough attention to backward compatibility that the chance of 
code breakage is quite small for pure-Python modules. Given that case, 
all we really need for them is a suitable way of moving them forward to 
an updated distribution (though, of course, the module authors may have 
brought out new versions that use more advanced language features, there 
is no real compulsion to migrate to those if you seek stability).

I don't believe that the major problem is the changes to the bytecodes - 
extension modules (those written in C and/or C++) don't generally use 
the bytecodes anyway. The real problem is the API to the interpreter, 
which again the developers retain the right to change between minor (but 
not micro) versions.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From ckwiguno at gmail.com  Sun Apr 24 14:02:54 2005
From: ckwiguno at gmail.com (Clara)
Date: 24 Apr 2005 11:02:54 -0700
Subject: opening new window in one window using Tkinter -- Help please
Message-ID: <1114365774.690048.280150@l41g2000cwc.googlegroups.com>

Hi,...
I meant to write an application where there is a button in a window and
when you click on the button, it will open a new window, but I want the
first window to close, replaced by the second window.
I open a login window and start the mainloop, when the user click on
the login button, the __call__ function of VerifyProcessor is executed
and it will call the new window which is the file manager window
The thing is,.. I don't know how to exit the first mainloop and then
display the second window...I even tried calling the mainloop again but
a weird thing happens. I really need help because otherwise I'm stuck
here and I can't complete my assignment. The following is my code:

from login import LoginMenu
app = LoginMenu()
app.master.title("Login Menu")
app.master.maxsize(300,200)
app.mainloop()
======================================
class LoginMenu(Frame):

	def createWidgets(self):
             self.loginButton = Button(self, text='Login', command =
VerifyProcessor(self.x, self.y, self.msg, self.messageLabel) )

        def __init__(self, master=None):
		Frame.__init__(self, master)
		self.grid(column=6, row=4)
		self.createWidgets()

class VerifyProcessor:

	def __init__(self, thename, thepass, msg, msglabel):
		self.username = thename
		self.password = thepass
		self.msgVar = msg
		self.msgLabel = msglabel

	def __call__(self):
		import md5
		import dictionaryloader
		found = 0
		theDict = dictionaryloader.loadFrom("Dicttxt")
		entries = theDict.items()
		for theuser, thepass in entries:
			if self.username.get() == theuser and
md5.new(self.password.get()).hexdigest() == thepass:
				found=1
				from mainmenu import FileManager
				app2 = FileManager(self.username.get())
				app2.master.title("File Manager")
				app2.master.maxsize("400,1500")
				app2.mainloop()
=====================================================================
class FileManager(Frame):

	def createWidgets(self, username):
               ...
        def __init__(self, username, master=None):
		Frame.__init__(self, master)
		self.grid(column=6, row=6)
		self.createWidgets(username)
======================================================================



From auch-ich-m at g-kein-spam.com  Mon Apr  4 02:39:36 2005
From: auch-ich-m at g-kein-spam.com (=?ISO-8859-1?Q?Andr=E9?= Malo)
Date: Mon, 4 Apr 2005 08:39:36 +0200
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com>
	<20611953.SkRsez8GTE@news.perlig.de>
	<11516i9g0usp235@corp.supernews.com>
Message-ID: <d2qnf5$a1b$1@news.web.de>

* "lothar" <lothar at ultimathule.nul> wrote:

> this response is nothing but a description of the behavior i reported.

Then you have not read my response carefully enough.

> as to whether this behaviour was intended, one would have to ask the module
> writer about that.

No, I've responded with a view on regexes, not on the module. That is the way
_regexes_ work. Non-greedy regexes do not match the minimal-length at all, they
are just ... non-greedy (technically the backtracking just stacks the longest
instead of the shortest). They *may* match the shortest match, but it's a
special case. Therefore I've stated that the documentation is incomplete.

Actually your expectations go a bit beyond the documentation. From a certain
point of view (matches always start most left) the matches you're seeing
*are* the minimal-length matches.

> because of the statement in the documentation, which places no qualification
                                                              ^^^^^^^^^^^^^^^^
                                                              that's the point.

> on how the scan for the shortest possible match is to be done, my guess is
> that this problem was overlooked.

In the docs, yes. But buy yourself a regex book and learn for yourself ;-)
The first thing you should learn about regexes is that the source of pain
of most regex implementations is the documentation, which is very likely
to be wrong.

Finally let me ask a question:

import re
x = re.compile('<.*?>')
print x.search('<title>...</title><body>...</body>').group(0)

What would you expect to be printed out? <title> or <body>? Why?

nd


From jepler at unpythonic.net  Sun Apr 24 12:54:26 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 24 Apr 2005 11:54:26 -0500
Subject: Why is Python not supporting full derivation of built-in file
	class?
In-Reply-To: <b8zae.11591$9G.927404@news20.bellglobal.com>
References: <b8zae.11591$9G.927404@news20.bellglobal.com>
Message-ID: <20050424165426.GA11121@unpythonic.net>

This issue was discussed in another recent python-list thread, called
"Writing to stdout and a log file".

My second post includes a patch to Python's "fileobject.c" that made the
code that started that thread work, but for reasons I mentioned in that
post I didn't want to push for inclusion of my patch.  I didn't check,
but it will probably allow your code to work too.

If you feel differently, then the thing to do is probably to submit the
patch plus a test case to the sf.net patch tracker for python
(sf.net/projects/python, click on "patches".  you'll need a sourceforge
account to submit the patch)

Jeff
PS I did allow the Python test suite to run to completion after I wrote
that message.  It didn't produce any failures or unexpected skips on my
platform.
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From qwweeeit at yahoo.it  Fri Apr 15 07:36:19 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 15 Apr 2005 04:36:19 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
Message-ID: <2ab23d7a.0504150336.1cdd8b93@posting.google.com>

Hi,
I have no more need to corret my code's bugs and send to clp group a
working application (I don't think that there was an eager
expectation...).
Your code  is perfectly working (as you can expect from a guru...).
Thank you and bye.


From tundra at tundraware.com  Mon Apr 18 05:07:27 2005
From: tundra at tundraware.com (Tim Daneliuk)
Date: 18 Apr 2005 05:07:27 EDT
Subject: Parse command line options
In-Reply-To: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>
References: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>
Message-ID: <h0acj2-7e.ln1@eskimo.tundraware.com>

hue wrote:
<SNIP>

>     try:
> 
>         opts,args = getopt.getopt(sys.argv[1:], 'n:t:h:i:o:',

                                                     ^^^^^^^
   This may be the problem.  As I recall, a colon following an option
   indicates that it is followed by an argument as in "-f filename".
   For options that are just switches (that take no argument), I believe
   they should appear in the list above *without* the colon suffix...




-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From draghuram at gmail.com  Tue Apr 26 14:36:03 2005
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 26 Apr 2005 11:36:03 -0700
Subject: how to find the drive in python/cygwin?
In-Reply-To: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
Message-ID: <1114540563.495134.77750@g14g2000cwa.googlegroups.com>


How about doing "cygpath -w /home/user" and picking the drive letter?

Raghu.



From mefjr75 at hotmail.com  Fri Apr  1 21:18:09 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 1 Apr 2005 18:18:09 -0800
Subject: Search-and-delete text processing problem...
References: <0eadnS8Lk5Aaa9DfRVn-gw@speakeasy.net>
Message-ID: <1112408289.832519.287880@z14g2000cwz.googlegroups.com>

Strings have many methods that are worth learning.
If you haven't already discovered dir(str) try it.
Also I am not sure if you were just typing in some pseudocode, but your
use of writelines is incorrect.
help(file.writelines)
Help on built-in function writelines:

writelines(...)
    writelines(sequence_of_strings) -> None.  Write the strings to the
file.

    Note that newlines are not added.  The sequence can be any iterable
object
    producing strings. This is equivalent to calling write() for each
string.

Todd_Calhoun wrote:
> I'm trying to learn about text processing in Python, and I'm trying
to
> tackle what should be a simple task.
>
> I have long text files of books with a citation between each
paragraph,
> which might be like "Bill D. Smith, History through the Ages, p.5".
>
> So, I need to search for every line that starts with a certain string
(in
> this example, "Bill D. Smith"), and delete the whole line.
>
> I've tried a couple of different things, but none seem to work.
Here's my
> latest try.  I apologize in advance for being so clueless.
>

##########################
#Text search and delete line tool
theInFile = open("test_f.txt", "r")
theOutFile = open("test_f_out.txt", "w")
allLines = theInFile.readlines()
theInFile.close()

for line in allLines:
    if not line.startswith('Bill'):
        theOutFile.write(line)

theOutFile.close()
#########################

# You can also accumulate lines
# in a list then write them all at once
##########################
#Text search and delete line tool
theInFile = open("test_f.txt", "r")
theOutFile = open("test_f_out.txt", "w")
allLines = theInFile.readlines()
theInFile.close()

outLines = []

for line in allLines:
    if not line.startswith('Bill'):
        outLines.append(line)

theOutFile.writelines(outLines)
theOutFile.close()
#########################

hth,
M.E.Farmer



From http  Thu Apr 28 18:06:56 2005
From: http (Paul Rubin)
Date: 28 Apr 2005 15:06:56 -0700
Subject: anonymous function objects?
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
Message-ID: <7x7jimlfnj.fsf@ruckus.brouhaha.com>

Uwe Mayer <merkosh at hadiko.de> writes:
> >>> f = {print "hello world"}
> >>> f()
> hello world

> in Pyton?  Lambda expressions don't work here.

Closest you can come is:

   f = lambda: sys.stdout.write("hello world\n")

Of course if you're trying to capture the function in a named variable
like f, just use a def statement.


From finite.automaton at gmail.com  Mon Apr 25 19:16:33 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 25 Apr 2005 16:16:33 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
	<1114457804.600476.324860@o13g2000cwo.googlegroups.com>
Message-ID: <1114470993.307543.133770@z14g2000cwz.googlegroups.com>

I don't know of a way to get the current global trace function.  This
could certainly cause trouble if you're trying to be compatible with
other packages that want to use their own trace functions (like psyco,
or debuggers).   Does anyone know how to get the global trace?

On the other hand, the local trace function is in the f_trace attribute
of a frame.

It looks like global trace functions only get the "call" event, and are
expected to return a local trace function that will receive "line" and
"return" events, so you will need a global trace in order to set local
traces (setting myframe.f_trace explicitly doesn't seem to do it).



From michele.simionato at gmail.com  Thu Apr 28 23:40:52 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 28 Apr 2005 20:40:52 -0700
Subject: anonymous function objects?
In-Reply-To: <d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
	<d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1114746052.411476.129880@o13g2000cwo.googlegroups.com>

Uwe Mayer:
> Why does the "print" statement return a syntax error here?

Google for "Python regrets" where Guido admits that
'print' should have been a function.

               Michele Simionato



From fredrik at pythonware.com  Fri Apr 22 17:14:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 23:14:14 +0200
Subject: trying to read from dying disk
References: <1114195387.535143.76860@o13g2000cwo.googlegroups.com><871x92mv76.fsf@pobox.com>
	<1114203696.267519.189200@o13g2000cwo.googlegroups.com>
Message-ID: <d4bp6d$pmf$1@sea.gmane.org>

jdh2358 at gmail.com wrote:

> Except that I'm writing a *python* program and trying to do a timeout
> on the python *file* read operation. 

and that *python* program is using the *C* runtime library, which calls
the *kernel* to do the work.

> If I asked the question on the kernel mailing list, they would rightly-
> fully assume I suspect that I should be writing a C program, and then
> they would suggest c.l.py.

if you asked the question in an intelligent way, they would probably explain
what mechanisms the kernel provides for this purpose, and give you the
hints you need to solve this.  in general, Python and C has no control what-
soever over what the operating system kernel does when reading data from
a disk.  surely you know that?

</F>



From bill.mill at gmail.com  Mon Apr 25 21:36:34 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Mon, 25 Apr 2005 21:36:34 -0400
Subject: Do I need a nested lambda to do this?
In-Reply-To: <200504260127.42614.james@wrong.nu>
References: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>
	<200504260127.42614.james@wrong.nu>
Message-ID: <797fe3d4050425183672a05fa9@mail.gmail.com>

On 4/25/05, R. C. James Harlow <james at wrong.nu> wrote:
> On Tuesday 26 April 2005 00:34, raoul wrote:
> > I can't figure this one out. Trying to be unnecessarily functional I
> > suspect.
> 
> With list comprehensions:
> 
> Python 2.3.4 (#1, Mar 26 2005, 20:54:10)
> [GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> vals = [1.000,2.344,4.2342]
> >>> tabs = [((0,1),(0,3),(0,4)),
> ...        ((2,2),(3,0),(3,9)),
> ...        ((3,4),(6,3),(7,1))]
> >>> [(tuple([(vals[index],subtab[1]) for subtab in tab])) for index,tab in
> enumerate(tabs)]
> [((1.0, 1), (1.0, 3), (1.0, 4)), ((2.3439999999999999, 2),
> (2.3439999999999999, 0), (2.3439999999999999, 9)), ((4.2342000000000004, 4),
> (4.2342000000000004, 3), (4.2342000000000004, 1))]

Slightly nicer, I think:

>>> vals
[1.0, 2.3439999999999999, 4.2342000000000004]
>>> tabs
[((0, 1), (0, 3), (0, 4)), ((2, 2), (3, 0), (3, 9)), ((3, 4), (6, 3), (7, 1))]
>>> [tuple([(v, t[1]) for t in tab]) for v, tab in zip(vals, tabs)]
[((1.0, 1), (1.0, 3), (1.0, 4)), 
((2.3439999999999999, 2), (2.3439999999999999, 0), 
  (2.3439999999999999, 9)), 
((4.2342000000000004, 4), (4.2342000000000004, 3),
  (4.2342000000000004, 1))]

Peace
Bill Mill
bill.mill at gmail.com

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


From gsmith at oxfam.org.uk  Fri Apr 15 08:13:37 2005
From: gsmith at oxfam.org.uk (Graham)
Date: Fri, 15 Apr 2005 13:13:37 +0100
Subject: MS SQL Server/ODBC package for Python
Message-ID: <425faff2$0$298$ed9e5944@reading.news.pipex.net>

I need a SQL Server or ODBC package for Python.  Can anyone help please?
Have search the Python packages under Database and there is no reference to
either SQL Server or ODBC.

Thanks
Graham




From tim.peters at gmail.com  Sat Apr  2 17:48:23 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Sat, 2 Apr 2005 17:48:23 -0500
Subject: Simple thread-safe counter?
In-Reply-To: <7xmzsg3ov6.fsf@ruckus.brouhaha.com>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
	<d2mmi8$g9t$1@panix2.panix.com> <7xmzsg3ov6.fsf@ruckus.brouhaha.com>
Message-ID: <1f7befae05040214484e16c041@mail.gmail.com>

[Paul Rubin]
> I'm starting to believe the GIL covers up an awful lot of sloppiness
> in Python.

The GIL is highly exploitable, and much of CPython does exploit it.

If you don't want to exploit it, that's fine:  there was always an
obvious approach using an explicit mutex here, and the only thing
stopping you from using it is a desire to be clever.  Exploiting the
GIL in CPython is clever; using an explicit mutex is utterly
straightforward.  Pick your poison.


From jerf at jerf.org  Mon Apr 25 20:01:53 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Mon, 25 Apr 2005 20:01:53 -0400
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
Message-ID: <pan.2005.04.26.00.01.53.726156@jerf.org>

On Mon, 25 Apr 2005 23:26:56 +0000, John Bokma wrote:

> Mike Meyer wrote:
> 
>> John Bokma <john at castleamber.com> writes:

Nobody ever changed their mind as a result of a 20-thread endless
reply-fest. As usual, the posters aren't about to admit anything, and none
of the bystanders are reading any more.


From mynews44 at yahoo.com  Wed Apr 27 13:34:42 2005
From: mynews44 at yahoo.com (googleboy)
Date: 27 Apr 2005 10:34:42 -0700
Subject: how can I sort a bunch of lists over multiple fields?
Message-ID: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>

I didn't think this would be as difficult as it now seems to me.

I am reading in a csv file that documents a bunch of different info on
about 200 books, such as title, author, publisher, isbn, date and
several other bits of info too.

I can do a simple sort over the first field (title as it turns out),
and that is fine as far as it gets:


import string

bookData = open(r'D:\path\to\books.csv', 'r')
sBookData = bookData.read()
lBooks = string.split(sBookData, '\n')

lBooks.sort()
sorted = string.join(lBooks, '\n')
output = open(r'D:\path\to\output.csv', 'w')
output.close()


I really want to be able to sort the list of books based on other
criterium, and even multiple criteria (such as by author, and then by
date.)

I am using python 2.4 and have found this site:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305304

and so I tried doing things like

>>>lBooks.sort(cmp=cmp5)
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
NameError: name 'cmp5' is not defined

(I was hoping that cmp5 meant it would use the 5th item in the lists to
sort across)

>>> lBooks.sort(key=lambda i:i[4])
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "<interactive input>", line 1, in <lambda>
IndexError: string index out of range


(I was hoping for similar things)


would you be so kind as to point me in the right direction?

THanks!

googleboy



From deetsNOSPAM at web.de  Wed Apr  6 10:03:27 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 06 Apr 2005 16:03:27 +0200
Subject: shebang in cross platform scripts
References: <d30om0$lb4$1@solaris.cc.vt.edu>
Message-ID: <d30q7e$8hn$05$1@news.t-online.com>

rbt wrote:

> 
> Haven't tested this on Windows yet... thought I'd ask here:
> 
> Does the line below have any negative impact on Windows machines? I
> develop and test mostly on Unix, but my scripts are often used on Win
> systems too.
> 
> #!/usr/bin/env python

Thanks to the # being the comment sign in python, it will be silently
discarded by windows.

-- 
Regards,

Diez B. Roggisch


From magoldfish at gmail.com  Thu Apr 14 23:05:16 2005
From: magoldfish at gmail.com (Marcus Goldfish)
Date: Thu, 14 Apr 2005 23:05:16 -0400
Subject: pythonic use of properties?
Message-ID: <5e183f3d05041420053ecd0ee@mail.gmail.com>

I'd like advice/opinions on when it is appropriate to do
attribute/property validation in python.  I'm coming from a C#/Java
background, where of course tons of "wasted" code is devoted to
property validation.  Here is a toy example illustrating my question:

#   Example: mixing instance attributes with properties.  Is it pythonic to
#   validate property data in setters?  Since tens and ones are never
#   validated, the class can be "broken" by setting these directly
class SillyDecimal(object):
   """A silly class to represent an integer from 0 - 99."""
   def __init__(self, arg=17):
       if isinstance(arg, tuple):
           self.tens = arg[0]
           self.ones = arg[1]
       else:
           self.number = arg

   def getNumber(self):
       return self.tens*10 + self.ones
   def setNumber(self, value):
       if value < 0 or value > 99:
           raise ArgumentException("Must in [0, 99]")
       self.tens = value // 10
       self.ones = value % 10
   number = property(getNumber, setNumber, None, "Complete number, [0-99]")

x = SillyDecimal()
x.number, x.tens, x.ones        # returns (17, 7, 1)

Even though "tens", "ones" and "number" all appear as attributes, only
"number" has its input validated.  Since the class is designed to only
hold numbers 0 - 99, one can 'break' it by setting self.tens=11, for
example.  Should tens and ones be made into full-fledged properties
and validated?  Should number have no validation?  Is it more pythonic
to encapsulate tightly, or rely on "responsible use."

Marcus


From miki.tebeka at zoran.com  Tue Apr 12 02:52:21 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 12 Apr 2005 09:52:21 +0300
Subject: NSInstaller Vs. Inno Setup
In-Reply-To: <1113250756.207904.29670@f14g2000cwb.googlegroups.com>
References: <1113250756.207904.29670@f14g2000cwb.googlegroups.com>
Message-ID: <20050412065221.GN2960@zoran.com>

Hello dcrespo,

> Any comments?
I'm happy with Inno.

Bye.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From fredrik at pythonware.com  Wed Apr 27 12:48:02 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 27 Apr 2005 18:48:02 +0200
Subject: compile shebang into pyc file
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com><fb66056705042707372695904d@mail.gmail.com><mailman.2582.1114615536.1799.python-list@python.org>
	<1114616582.677507.252650@z14g2000cwz.googlegroups.com>
Message-ID: <d4ofdv$d5b$1@sea.gmane.org>

Joerg Schuster wrote:

> > #!/usr/bin/env python
> > import app
>
> Yes, of course this is a possibility. But it implies having (or giving
> away) two files.

yeah, think of all the disk space you'll waste!

> Because if you have two files, you need a third one: a README
> that tells you what to do with the two files

so you're saying that the set of people that can deal with no more than one
file at a time but knows how to install and configure Python (which in itself
comes with a few thousand files) is larger than zero?

> I think having one file is always better than having two files.

so you don't ever use modules?

you haven't distributed many Python programs, have you?

</F>



From t-meyer at ihug.co.nz  Mon Apr 25 22:24:06 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Tue, 26 Apr 2005 14:24:06 +1200
Subject: Quote-aware string splitting
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802B45D75@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB00EC@its-xchg4.massey.ac.nz>

> I need to split a string as per string.strip(), but with a 
> modification: 
> I want it to recognize quoted strings and return them as one 
> list item, 
> regardless of any whitespace within the quoted string.

See the recent python-tutor thread starting here:

<http://mail.python.org/pipermail/tutor/2005-April/037288.html>

For various solutions.  Or just use a regular expression, which is what the
thread concludes.

=Tony.Meyer



From martin.witte at gmail.com  Wed Apr  6 14:21:57 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 6 Apr 2005 11:21:57 -0700
Subject: how to parse system functions output
In-Reply-To: <H8qdnU3n67gHcs7fRVn-2g@powergate.ca>
References: <mailman.1426.1112792464.1799.python-list@python.org>
	<H8qdnU3n67gHcs7fRVn-2g@powergate.ca>
Message-ID: <1112811717.476345.146740@z14g2000cwz.googlegroups.com>

Or if you run 2.4 you can use subprocess



From abuse at solumslekt.org  Tue Apr 19 23:53:38 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Wed, 20 Apr 2005 05:53:38 +0200
Subject: How to run Python in Windows w/o popping a DOS box?
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
Message-ID: <6nk9e.7043$ai7.151988@news2.e.nsc.no>

Paul Rubin skrev:

> Question: is there any simple way to arrange to launch the app from
> the desktop, without also launching a DOS box?

Just use the .pyw extension instead of .py, and the DOS box
automagically disappears -- or so I have been told ...
-- 
Leif Biberg Kristensen
http://solumslekt.org/


From steve at holdenweb.com  Thu Apr 21 05:43:36 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 05:43:36 -0400
Subject: deprecation of has_key?
In-Reply-To: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>
References: <1114069715.945176.73750@l41g2000cwc.googlegroups.com>
Message-ID: <426775C8.3000303@holdenweb.com>

nicksjacobson at yahoo.com wrote:
> I haven't heard of any plans to deprecate the dictionary has_key
> method, as the "in" keyword makes it obsolete.
> 
> i.e.
> if key in dict:
> 
> instead of
> if dict.has_key():
> 
> 
> Is there some reason to keep has_key?
> 
Two words: backward compatibility. To lose that method now would break 
thousands of existing programs. The 2.4 library would probably 
experience breakage too ... let's see:

$ find /lib/python2.4/ -name "*.py" -exec grep has_key {} \; | wc -l
587

Oops!

The method might disappear in Python 3.0, when we will be allowed to 
break backward compatibility - you are correct in saying it's no longer 
necessary.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From jeremysanders at gmail.com  Sun Apr 17 07:58:24 2005
From: jeremysanders at gmail.com (Jeremy Sanders)
Date: Sun, 17 Apr 2005 12:58:24 +0100
Subject: ANN: Veusz 0.5 - a scientific plotting package
Message-ID: <mailman.2027.1113746240.1799.python-announce-list@python.org>

Veusz 0.5
---------
Velvet Ember Under Sky Zenith
-----------------------------
http://home.gna.org/veusz/

Veusz is Copyright (C) 2003-2005 Jeremy Sanders <jeremy at jeremysanders.net>
Licenced under the GPL (version 2 or greater)

Veusz is a scientific plotting package written in Python (currently
100% Python). It uses PyQt for display and user-interfaces, and
numarray for handling the numeric data. Veusz is designed to produce
publication-ready Postscript output.

Veusz provides a GUI, command line and scripting interface (based on
Python) to its plotting facilities. The plots are built using an
object-based system to provide a consistent interface.

Changes from 0.4:
 Installation:
  * distutils used to install the package. RPMS available.
 Plotting:
  * Different error bar styles (diamond, curve...)
  * "Matched" axes, with the same scale on each
  * Data can be linked from external files instead of embedded in
    document
  * Filled regions under/over functions or xy plots
  * Improved function clipping near edge of plot
  * Default values can be set for settings, which are remembered
    between sessions (e.g. blue points for xy3).
  * Rotated text labels
  * Improved fitting, giving results from chi2, etc..
 UI:
  * Can move around widgets and delete them
  * Exception dump dialog to send bug reports
  * Improved import dialog help
  * Propagate settings between widgets
  * Window positions are saved between sessions	
 Reading data:
  * Better error handling when reading data
 + Numerous bug fixes

Features of package:
 * X-Y plots (with errorbars)
 * Stepped plots (for histograms)
 * Line plots
 * Function plots
 * Fitting functions to data
 * Stacked plots and arrays of plots
 * Plot keys
 * Plot labels
 * LaTeX-like formatting for text
 * EPS output
 * Simple data importing
 * Scripting interface
 * Save/Load plots

To be done:
 * Contour plots
 * Images
 * UI improvements
 * Import filters (for qdp and other plotting packages, fits, csv)
 * Data manipulation
 * Python embedding interface (for embedding Veusz in other programs).
   [some of the external interface is complete]

Requirements:
 Python (probably 2.3 or greater required)
   http://www.python.org/
 Qt (free edition)
   http://www.trolltech.com/products/qt/  
 PyQt (SIP is required to be installed first)
   http://www.riverbankcomputing.co.uk/pyqt/
   http://www.riverbankcomputing.co.uk/sip/
 numarray
   http://www.stsci.edu/resources/software_hardware/numarray
 Microsoft Core Fonts (recommended)
   http://corefonts.sourceforge.net/

For documentation on using Veusz, see the "Documents" directory. The
manual is in pdf, html and text format (generated from docbook).

If you enjoy using Veusz, I would love to hear from you. Please join
the mailing lists at

https://gna.org/mail/?group=veusz

to discuss new features or if you'd like to contribute code. The
newest code can always be found in CVS.

Cheers

Jeremy



From kerny404 at gmail.com  Wed Apr 27 18:31:16 2005
From: kerny404 at gmail.com (andrea)
Date: Thu, 28 Apr 2005 00:31:16 +0200
Subject: creating very small types
In-Reply-To: <pan.2005.04.27.21.46.20.199466@jerf.org>
References: <mailman.2599.1114633031.1799.python-list@python.org>
	<pan.2005.04.27.21.46.20.199466@jerf.org>
Message-ID: <427012B4.7090604@gmail.com>

Jeremy Bowers wrote:

>On Wed, 27 Apr 2005 22:17:07 +0200, andrea wrote:
>
>  
>
>>I was thinking to code the huffman algorithm and trying to compress
>>something with it, but I've got a problem.
>>How can I represent for example a char with only 3 bits??
>>I had a look to the compression modules but I can't understand them much...
>>
>>Thank you very much
>>Any good link would be appreciated of course :)
>>    
>>
>
>I think the answer to this question very much depends on why you want to
>do this. Easy and fast are pretty opposed in this particular domain in
>Python (IMHO anyways, it's an easy bit-bashing language but it's slow
>for that), and you're in one of the rare domains where it matters.
>
>The answers strongly vary if you're trying to create something performant,
>or just for your learning purposes. Or homework purposes... ;-)
>
>  
>
No it's not for homework but for learning purposes...
I understand I can't do it easily in python, but maybe I could define a
new type in C and use it to do those dirty works, what do you think?


From mahs at telcopartners.com  Mon Apr  4 15:04:42 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 04 Apr 2005 12:04:42 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <pKidnV5nSIJNGszfRVn-vg@comcast.com>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>	<mailman.1305.1112633442.1799.python-list@python.org>
	<pKidnV5nSIJNGszfRVn-vg@comcast.com>
Message-ID: <d2s32o$5tj$1@sea.gmane.org>

Steven Bethard wrote:
> Michael Spencer wrote:
> 
>>     def __deepcopy__(self, memo={}):
>>         from copy import deepcopy
>>         result = self.__class__()
>>         memo[id(self)] = result
>>         result.__init__(deepcopy(tuple(self), memo))
>>         return result
> 
> 
> I know this is not your recipe, but is there any reason to use
>     self.__class__()
> instead of
>     type(self)()
> if you know you're inside a new-style class?
> 
> STeVe
I don't know - aren't they identical? I would write self.__class__ (without 
claiming that that's better)

BTW, I had a different question about the method:

wouldn't:
     result = self.__class__.__new__()
or in your form:
     result = type(self).__new__()

be better (i.e., clearer and possibly safer) than calling __init__ twice (but I 
haven't tried it!)

Michael





From reinhold-birkenfeld-nospam at wolke7.net  Fri Apr 22 13:09:16 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Fri, 22 Apr 2005 19:09:16 +0200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <d4b32c$mo7$1@panix2.panix.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<3cr2caF6locm6U1@individual.net>
	<roy-41B7B8.22172521042005@reader1.panix.com>
	<3csdegF6p6jpnU1@individual.net> <d4b32c$mo7$1@panix2.panix.com>
Message-ID: <3csphpF6es7iuU1@individual.net>

Roy Smith wrote:

>>Other possibility, probably faster when almost all keys in the range are in
>>the dictionary:
>>
>>class sdict(dict):
>>    def __getitem__(self, index):
>>        if isinstance(index, slice):
>>            d = {}
>>            for key in xrange(slice.start, slice.stop, slice.step):
>>                if key in self:
>>                    d[key] = self[key]
>>            return d
>>        else:
>>            return dict.__getitem__(self, index)
> 
> The problem with that is it requires the keys to be integers.

Yes, but wasn't it thought as a replacement for a list?

Reinhold


From jjl at pobox.com  Sun Apr 24 08:08:55 2005
From: jjl at pobox.com (John J. Lee)
Date: 24 Apr 2005 12:08:55 +0000
Subject: figuring out # of bytes
References: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
	<mailman.2309.1114202268.1799.python-list@python.org>
Message-ID: <87is2cqsvc.fsf@pobox.com>

Jaime Wyant <programmer.py at gmail.com> writes:

> On 22 Apr 2005 13:28:57 -0700, codecraig <codecraig at gmail.com> wrote:
> > i want to the number of bytes in a string...
> > 
> > is, len(x) accurate?
> > 
> > so, x = "hi"
> > len(x) == 2 ....so that means two bytes?
> > 
> > thanks
> 
> No, that means that the string is two bytes in length.  The number of
> bytes is dependent on the encoding.  It seems like there was a thread
[...]

That's only an issue if type(x) != str.  (eg., type(x) == unicode)


John


From tjreedy at udel.edu  Tue Apr 19 23:01:30 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 19 Apr 2005 23:01:30 -0400
Subject: Refactoring in Python.
References: <8764yiog3y.fsf@hector.domek><mailman.2120.1113930792.1799.python-list@python.org>	<87y8bemxhy.fsf@hector.domek><mailman.2128.1113938921.1799.python-list@python.org>
	<0O6dnQQ2MsN77PjfRVn-gQ@powergate.ca>
Message-ID: <d44geb$o8n$1@sea.gmane.org>


"Peter Hansen" <peter at engcorp.com> wrote in message 
news:0O6dnQQ2MsN77PjfRVn-gQ at powergate.ca...
> Terry Reedy wrote:
>> Another specifically helpful reference might be Beck's (author?) book on 
>> Test-Driven Development.  Part 1 uses an example in Java, I believe. 
>> Part 2, I know, uses an example in Python.  There at least used to be a 
>> copy online.
>
> The online copy was merely a draft, never brought up
> to the final state of the paper version and, if I
> recall correctly, entirely missing the Python sections.

It was the online copy that I read *with* a Python section.  Have no idea 
if there was more in the book.

tjr





From vincent at visualtrans.de  Tue Apr 12 04:56:29 2005
From: vincent at visualtrans.de (vincent wehren)
Date: Tue, 12 Apr 2005 10:56:29 +0200
Subject: How to minimize the window
References: <d3fu6s$5ek$1@netnews.hinet.net>
Message-ID: <d3g2ft$2vn$1@news6.zwoll1.ov.home.nl>

"Austin" <austin at maxtronic.com.tw> schrieb im Newsbeitrag 
news:d3fu6s$5ek$1 at netnews.hinet.net...
|I wrote a GUI program with wxPython.
| In the window, there are 3 attributes on left top.
| "_" could let the program to minimize to tool bar.
| I want to let the program minimized to the system tray.

You can take look at "Main.py" in the wx Demo.

Look for "class DemoTaskBarIcon(wx.TaskBarIcon)" and how it is
used in the "wxPythonDemo" class.

| Is there any way to let the window have 4 attributes?
| "."  "_"  "O " "x"

Not that I know of.

HTH,
--

Vincent Wehren





From reder at jpl.nasa.gov  Mon Apr 25 13:46:57 2005
From: reder at jpl.nasa.gov (Leonard J. Reder)
Date: Mon, 25 Apr 2005 10:46:57 -0700
Subject: What is situation with threads in Python
Message-ID: <426D2D11.3020905@jpl.nasa.gov>

Hello Mark,

I took your three day course here at JPL and recall that you said 
something was wrong with the implementation of threads within Python
but I cannot recall what.  So what is wrong with threads in Python?

The other part of this question is, if there is something wrong with
the threads in Python has anyone wrapped the Posix threads C api using
swig to fix this problem?  I work on Solaris/Linux systems and this
seems like a quick fix - maybe.

Enjoyed the class a great deal.  I am also sending this to the news 
group in hopes of various interesting replies.  Maybe there is a web 
article on this topic already that someone could send the URL.

Thanks for all replies,

Len
-- 
____________________________________________________
Leonard J. Reder
Jet Propulsion Laboratory
Interferometry Systems and Technology Section 383
Email: reder at huey.jpl.nasa.gov
Phone (Voice): 818-354-3639
Phone (FAX): 818-354-4357
Mail Address:
Mail Stop: 171-113
4800 Oak Grove Dr.
Pasadena, CA. 91109
---------------------------------------------------


From gsakkis at rutgers.edu  Wed Apr 13 02:02:26 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 12 Apr 2005 23:02:26 -0700
Subject: Global Variables
References: <425ca975$1@dnews.tpgi.com.au>
Message-ID: <1113372146.082832.28040@o13g2000cwo.googlegroups.com>

Use 'global':

def change_filename():
   global filename
   filename=raw_input()


def change_path():
   global path
   path=raw_input()


Even better, don't use globals at all; in 99% if the time, there are
better ways to achieve the same effect.

George



From steve at holdenweb.com  Fri Apr  8 12:29:34 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 12:29:34 -0400
Subject: Interpreter problem
In-Reply-To: <d368nj$n56$1@solaris.cc.vt.edu>
References: <425684F8.5060507@novasyshealth.com>	<mailman.1538.1112970334.1799.python-list@python.org>	<d365ha$h33$1@solaris.cc.vt.edu>	<mailman.1540.1112974136.1799.python-list@python.org>
	<d368nj$n56$1@solaris.cc.vt.edu>
Message-ID: <d36bc9$gdl$1@sea.gmane.org>

rbt wrote:
> Steve Holden wrote:
> 
>> rbt wrote:
>>
>>> Steve Holden wrote:
>>>
>>>> Greg Lindstrom wrote:
>>>>
>>>>> I am using python 2.3.5 on a Linux system and have an odd problem 
>>>>> dealing with the 'sha-bang' line.  I have a file, driver.py which 
>>>>> starts with
>>>>>
>>>>> #!/usr/bin/python
>>>>>
>>>>> and works fine (that is, when I type in ./driver.py at the command 
>>>>> prompt the file runs as expected).  I have another file, 
>>>>> myotherfile.py which starts with the exact same line 
>>>>> (#!/usr/bin/python) but I get
>>>>>
>>>>> : bad interpreter: No such file or directory
>>>>>
>>>> There's almost certainly a carriage return as well as a newline in 
>>>> the shebang line.
>>>>
>>>> [...]
>>>>
>>>> regards
>>>>  Steve
>>>
>>>
>>>
>>>
>>> Not so. I get the same result with python 2.3 and 2.4 on Debian Linux 
>>> Testing. Nothing odd at all in the shebang.
>>
>>
>>
>> What, you are telling me you've checked the file with a command like
>>
>>   head driver.py | od -bc
>>
>> and verified the absence of any extraneous characters?
>>
>> regards
>>  Steve
> 
> 
> You're right:
> 
> rbt at athop1:~$ cd /usr/local/bin
> rbt at athop1:/usr/local/bin$ head web* | od -bc
> 0000000 043 041 057 165 163 162 057 142 151 156 057 160 171 164 150 157
>           #   !   /   u   s   r   /   b   i   n   /   p   y   t   h   o
> 0000020 156 015 012 144 145 146 040 167 145 142 137 142 141 143 153 165
>           n  \r  \n
> 
Nice to know my psychic powers are still functioning correctly :-)

> How can this be fixed? vim doesn't see it.

Do you have a "dos2unix" utility? Otherwise use "tr" to delete \013 
characters, IIRC - it's a while since I used anything but dos2unix to do 
this.

Of course you could just read and write the file in Python in text mode, 
that might get rid of the returns.

There's probably a vim mode you can set to display the extraneous 
characters - it normally screams "^M" at me for files with carriage 
returns in them. You may find it telling you the file is being edits in 
"DOS mode" when you open it up, and again there's probably vim magic you 
can do to force it to write in "unix mode" too - I'll leave that to the 
vimsters.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From ajikoe at gmail.com  Sun Apr 10 04:53:25 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 10 Apr 2005 01:53:25 -0700
Subject: Unit tests in Leo
In-Reply-To: <fKI5e.3$7K4.2@read3.inet.fi>
References: <fKI5e.3$7K4.2@read3.inet.fi>
Message-ID: <1113123204.994313.91290@f14g2000cwb.googlegroups.com>

Hello Tomi,

I'm not really sure about your question, but concerning unit testing
you can do a simple test.

import unittest

First:  in your module (where you define functions) you should create a
class which use unittest.TestCase as your superclass.

Second: Use method runTest to type your test

Third: below the __name__ == "__main__" type unittest.main();

For example:
class testMyFunc(unittest.TestCase):
  def runTest(self):
    h = myFunc()
    self.assertEqual(something,h)
#----------------------
if __name__ == "__main__":
  unittest.main();


Sincerely Yours,
Pujo



From greg at cosc.canterbury.ac.nz  Sun Apr  3 22:24:44 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Mon, 04 Apr 2005 14:24:44 +1200
Subject: Making a DLL with python?
In-Reply-To: <1112313734.294924.182600@z14g2000cwz.googlegroups.com>
References: <1112250718.122970.53480@g14g2000cwa.googlegroups.com>
	<5qydnYMHcvmjkdHfRVn-iQ@comcast.com>
	<1112313734.294924.182600@z14g2000cwz.googlegroups.com>
Message-ID: <3bbmrnF6g6derU1@individual.net>

jppx1 at bigfoot.com wrote:
> 
> I'd love to do the whole thing in Python, but I don't know how to make
> a DLL purely from Python.

I don't think you can do it *purely* in Python. You'll at
least need a C or Pyrex wrapper which dispatches to Python
code.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From zathras at thwackety.com  Sun Apr 24 13:53:44 2005
From: zathras at thwackety.com (Michael Sparks)
Date: Sun, 24 Apr 2005 18:53:44 +0100
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<1114357137.234806.141920@z14g2000cwz.googlegroups.com>
Message-ID: <426bee8a$0$42333$ed2619ec@ptn-nntp-reader02.plus.net>

ajikoe at gmail.com wrote:

> when you use a = a + 'world'  python sees it as an error because of
> different type.
> 
> But when you use a += 'world'
> python will change the right into list (because a is a list). So when
> you're code become:
> a += 'world' # a += list('world')
> 
> It really helpful if you stick to use append instead of += when you
> operate list

This was part of a test case I expected to fail. I was surprised when it
passed. Passing caused a latent bug, which I fixed, and I'm preventing it's
re-occurrence by changing the way the test is written.

The value that was being updated is expected to be a _string_. However it
had the possibility of being a list of strings , *if* the code was not
making appropriate checks. The test was intended to detect that failure in
the code. The fact that f += foo succeeded where f = f + foo would fail
masked a bug. It was rewritten around moments after I discovered this, but
it struck me as rather odd.

Based on this comment from the language reference posted by Grant I'd
personally consider it to be a bug...

??????"An?augmented?assignment?expression?like?x?+=?1?can?be
??????rewritten?as?x?=?x?+?1?to?achieve?a?similar,?but?not
??????exactly?equal?effect.?In?the?augmented?version,?x?is?only
??????evaluated?once."

(I don't consider one operation succeeding and other other throwing an
exception to be similar effects)

Whilst I understand the explanations given (expected them as my post
indicated), the above comment is the one that clinches it for me.

(I also agree for example that it's good that extend takes any iterable for
example, but a PITA that += maps to extend)

That said, the bug reference mentioned above was closed with the leading
comment:

"""I think Guido said if he had it to do over, += would not be
able to take any iterable. However, that behavior has been
set in stone for several years now and it would be hard to
take away."""

   https://sourceforge.net/tracker/?func=detail&atid=105470&aid=848812&group_id=5470

I'm now wondering whether it should be posted as a bug, if it's not likely
to be solved short of Python 3000. (ie whether I should just consider it a
wart instead... :)

(If that's really the case I'd happily consider writing a doc patch as a
warning about the behaviour)


Michael.



From postmaster at castleamber.com  Sat Apr 23 18:55:50 2005
From: postmaster at castleamber.com (John Bokma)
Date: 23 Apr 2005 22:55:50 GMT
Subject: Python or PHP?
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
Message-ID: <Xns9641B65EDB2Ccastleamber@130.133.1.4>

Leif K-Brooks wrote:

> John Bokma wrote:
>> Not. Perl and Java use similar methods where one can specify place
>> holders, and pass on the data unescaped. But still injection is
>> possible. 
> 
> How?

my $sort = $cgi->param( "sort" );
my $query = "SELECT * FROM table WHERE id=? ORDER BY $sort";



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


From newsuser at stacom-software.de  Wed Apr 27 04:53:04 2005
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Wed, 27 Apr 2005 10:53:04 +0200
Subject: Howto debug c++ (SWIG) extension under Windows
In-Reply-To: <mailman.2532.1114537748.1799.python-list@python.org>
References: <d4l0ah$hqe$01$1@news.t-online.com>
	<mailman.2532.1114537748.1799.python-list@python.org>
Message-ID: <426F52F0.4080009@stacom-software.de>

Miki Tebeka schrieb:

> Hello Alexander,
> 
>>I can't figure out howto debug my c++ extension. If i compile it as 
>>release version, I've of course no chance to set a breakpoint.
> This is not true. You *can* set breakpoints in release mode, make sure to
> add debug information to your release build so you'll be able to see the
> sources.
> There are several cases (such as inlined functions) that you *can't* set
> breakpoint to.

Don't work because of  my MSVCR71D.dll problem. It seems, that if I 
include DEBUG informations in my project, there is a reference to that 
(debug) DLL.

> 
>>If I > compile as debug I get the Error-window:
>>
>>... missing MSVCR71D.dll ...
> Just copy it (and msvcp71d.dll) from your c:\windows\system32 (or wherever
> your windows is installed) to the "Debug" library (or to the Python install
> library).

I don't have the dll MSVCR71D.dll on my system path. What I'm a bit
confused about is, that I can't even start python_d (installed by 
ActiveState DEBUG extension to ActivePython). It requires also the DLL.

Does anybody know, where to get that DLL ?

Regards
Alexander


From timr at probo.com  Sun Apr 10 02:05:09 2005
From: timr at probo.com (Tim Roberts)
Date: Sat, 09 Apr 2005 23:05:09 -0700
Subject: Https Form Page
References: <mailman.1570.1112991192.1799.python-list@python.org>
Message-ID: <c9gh519da9ee8of0qlosfifjd73pn3o9qj@4ax.com>

Hasan D <python.tr at gmail.com> wrote:
>
>I'm new on this httplib and urllib. Actually I dont know what should i use.
>
>I want to fill the form in a "https" page , and return the result . I
>write a test code but always gives errors. I cant find any good
>example about this on the net. What should I do about this ?
>
>import urlparse,urllib,httplib,string,htmllib,formatter
>
>#port="443"
>target="https://www.abc.com/"
>params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
>http=httplib.HTTP("https://www.abc.com/",443)

If you want https, you should use the HTTPS class.

  http = httplib.HTTPS("https://www.abc.com/",443)

Or, even better, the HTTPSConnection class.

  http://www.noah.org/python/https/
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From fred.dixon at gmail.com  Mon Apr 11 16:27:56 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 11 Apr 2005 13:27:56 -0700
Subject: Avoiding DOS Window...
References: <mailman.1676.1113209951.1799.python-list@python.org>
Message-ID: <1113251276.922377.177220@o13g2000cwo.googlegroups.com>

Launching a subprocess without a console window

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/409002



From quentel.pierre at wanadoo.fr  Sat Apr  9 03:46:35 2005
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sat, 09 Apr 2005 09:46:35 +0200
Subject: Declaring variables from a list
In-Reply-To: <1163d88e.0504081255.438fbb96@posting.google.com>
References: <1163d88e.0504081255.438fbb96@posting.google.com>
Message-ID: <4257885c$0$19342$8fcfb975@news.wanadoo.fr>

You can use the built-in statement exec 
(http://www.python.org/doc/2.4.1/ref/exec.html) :

# Blob = ['Var1', 'Var2', 'vAR3']
# i = 5
# for listitems in Blob:
#     i += 1
#     exec('%s = i' %listitems)
#
# print Var1, Var2, vAR3

Regards,
Pierre


From jeremy.fleming at gmail.com  Fri Apr 29 03:50:02 2005
From: jeremy.fleming at gmail.com (jeremy fleming)
Date: Fri, 29 Apr 2005 02:50:02 -0500
Subject: Python C API version mismatch for module pytspc ---Gyach voice
	chat problems
Message-ID: <1114761002.17810.0.camel@weasel.isa-geek.net>

(EXPAND|FILL)



From kirk at jobsluder.net  Sat Apr 23 12:28:18 2005
From: kirk at jobsluder.net (Kirk Job Sluder)
Date: Sat, 23 Apr 2005 16:28:18 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
Message-ID: <87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>

"Lad" <python at hope.cz> writes:

> Is anyone capable of providing Python advantages over PHP if there are
> any?
> Cheers,
> L.

PHP is strongly wedded to providing web-based content, while Python can
be used to build a large number of different types of applications.  

-- 
Kirk Job-Sluder
"The square-jawed homunculi of Tommy Hilfinger ads make every day an
existential holocaust."  --Scary Go Round


From andreas at kostyrka.org  Wed Apr 13 06:18:32 2005
From: andreas at kostyrka.org (andreas at kostyrka.org)
Date: Wed, 13 Apr 2005 12:18:32 +0200
Subject: HTTPSConnection script fails, but only on some servers (long)
In-Reply-To: <d3ftlj$r3c$1@sea.gmane.org>
References: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
	<d3ftlj$r3c$1@sea.gmane.org>
Message-ID: <20050413101832.GA25327@heaven.kostyrka.org>

Well HTTPSConnection does not support proxies. (HTTP/CONNECT + switch to HTTPS)

And it hasn't ever. Although the code seems to make sense there is
no support for handling that switch. Probably a good thing to complain
about (file a new bug report).

In the meantime you should take a look a cURL and pycurl, which do support
all kind of more extreme HTTP (FTP, etc.) handling, like using https over
an proxy.

Andreas

On Tue, Apr 12, 2005 at 03:37:33AM -0400, Steve Holden wrote:
> Paul Winkler wrote:
> >This is driving me up the wall... any help would be MUCH appreciated.
> >I have a module that I've whittled down into a 65-line script in
> >an attempt to isolate the cause of the problem.
> >
> >(Real domain names have been removed in everything below.)
> >
> >SYNOPSIS:
> >
> >I have 2 target servers, at https://A.com and https://B.com.
> >I have 2 clients, wget and my python script.
> >Both clients are sending GET requests with exactly the
> >same urls, parameters, and auth info.
> >
> >wget works fine with both servers.
> >The python script works with server A, but NOT with server B.
> >On Server B, it provoked a "Bad Gateway" error from Apache.
> >In other words, the problem seems to depend on both the client
> >and the server. Joy.
> >
> >Logs on server B show malformed URLs ONLY when the client
> >is my python script, which suggests the script is broken...
> >but logs on server A show no such problem, which suggests
> >the problem is elsewhere.
> >
> >DETAILS
> >
> >Note, the module was originally written for the express
> >purpose of working with B.com;  A.com was added as a point of reference
> >to convince myself that the script was not totally insane.
> >Likewise, wget was tried when I wanted to see if it might be
> >a client problem.
> >
> >Note the servers are running different software and return different
> >headers. wget -S shows this when it (successfully) hits url A:
> >
> > 1 HTTP/1.1 200 OK
> > 2 Date: Tue, 12 Apr 2005 05:23:54 GMT
> > 3 Server: Zope/(unreleased version, python 2.3.3, linux2) ZServer/1.1
> > 4 Content-Length: 37471
> > 5 Etag:
> > 6 Content-Type: text/html;charset=iso-8859-1
> > 7 X-Cache: MISS from XXX.com
> > 8 Keep-Alive: timeout=15, max=100
> > 9 Connection: Keep-Alive
> >
> >... and this when it (successfully) hits url B:
> >
> > 1 HTTP/1.1 200 OK
> > 2 Date: Tue, 12 Apr 2005 04:51:30 GMT
> > 3 Server: Jetty/4.2.9 (Linux/2.4.26-g2-r5-cti i386 java/1.4.2_03)
> > 4 Via: 1.0 XXX.com
> > 5 Content-Length: 0
> > 6 Connection: close
> > 7 Content-Type: text/plain
> >
> >Only things notable to me, apart from the servers are the "Via:" and
> >"Connection:" headers. Also the "Content-Length: 0" from B is odd, but
> >that doesn't seem to be a problem when the client is wget.
> >
> >Sadly I don't grok HTTP well enough to spot anything really
> >suspicious.
> >
> >The apache ssl request log on server B is very interesting.
> >When my script hits it, the request logged is like:
> >
> >A.com - - [01/Apr/2005:17:04:46 -0500] "GET
> >https://A.com/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
> >HTTP/1.1" 502 351
> >
> >... which apart from the 502, I thought reasonable until I realized
> >there's
> >not supposed to be a protocol or domain in there at all.  So this is
> >clearly
> >wrong. When the client is wget, the log shows something more sensible
> >like:
> >
> >A.com - - [01/Apr/2005:17:11:04 -0500] "GET
> >/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
> >HTTP/1.0" 200 -
> >
> >... which looks identical except for not including the spurious
> >protocol and domain, and the response looks as expected (200 with size
> >0).
> >
> >So, that log appears to be strong evidence that the problem is in my
> >client
> >script, right?  The failing request is coming in with some bad crap in
> >the path, which Jboss can't handle so it barfs and Apache responds with
> >
> >Bad Gateway.  Right?
> >
> >So why does the same exact client code work when hitting server B??
> >No extra gunk in the logs there. AFAICT there is nothing in the script
> >that could lead to such an odd request only on server A.
> >
> >
> >THE SCRIPT
> >
> >#!/usr/bin/python2.3
> >
> >from httplib import HTTPSConnection
> >from urllib import urlencode
> >import re
> >import base64
> >
> >url_re = re.compile(r'^([a-z]+)://([A-Za-z0-9._-]+)(:[0-9]+)?')
> >
> >target_urls = {
> >    'B': 'https://B/SkinServlet/zopeskin',
> >    'A': 'https://A/zope/manage_main',
> >}
> >
> >auth_info= {'B':    ('userXXX', 'passXXX'),
> >            'A':    ('userXXX', 'passXXX'),
> >            }
> >
> >def doRequest(target, **kw):
> >    """Provide a trivial interface for doing remote calls.
> >    Keyword args are passed as query parameters.
> >    """
> >    url = target_urls[target]
> >    user, passwd = auth_info[target]
> >    proto,host,port=url_re.match(url).groups()
> >    if port:
> >        port = int(port[1:])   # remove the ':' ...
> >    else:
> >        port = 443
> >    creds = base64.encodestring("%s:%s" % (user, passwd))
> >    headers = {"Authorization": "Basic %s" % creds }
> >    params = urlencode(kw).strip()
> >    if params:
> >        url = '%s?%s' % (url, params)
> >    body = None # only needed for POST
> >    args =('GET', url, body, headers)
> >    print "ARGS: %s" % str(args)
> >    conn = HTTPSConnection(host)
> >    conn.request(*args)
> >    response = conn.getresponse()
> >    data = response.read()
> >    if response.status >= 300:
> >        print
> >        msg = '%i ERROR reported by remote system %s\n' %
> >(response.status,
> >                                                           url)
> >        msg += data
> >        raise IOError, msg
> >    print "OK!"
> >    return data
> >
> >if __name__ == '__main__':
> >    print "attempting to connect..."
> >    result1 = doRequest('A', skey='id', rkey='id')
> >    result2 = doRequest('B', action='updateSkinId',
> >                        skinId='406',  facilityId='1466')
> >    print "done!"
> >
> >
> ># EOF
> >
> >
> >So... what the heck is wrong here?
> >
> >at-wits-end-ly y'rs,
> >
> >Paul Winkler
> >
> Paul:
> 
> I don't claim to have analyzed exactly what's going on here, but the 
> most significant difference between the two is that you are accessing 
> site B using HTTP 1.1 via an HTTP 1.0 proxy (as indicated byt he "Via:" 
> header).
> 
> Whether this is a clue or a red herring time alone will tell.
> 
> It's possible that wget and your client code aren't using the same proxy 
> settings, for example.
> 
> regards
>  Steve
> -- 
> Steve Holden        +1 703 861 4237  +1 800 494 3119
> Holden Web LLC             http://www.holdenweb.com/
> Python Web Programming  http://pydish.holdenweb.com/
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list


From sunnan at handgranat.org  Sun Apr  3 18:37:00 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sun, 03 Apr 2005 22:37:00 GMT
Subject: boring the reader to death (wasRe: Lambda: the Ultimate Design
 Flaw
In-Reply-To: <d2mh97$8sj$1@panix2.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<d2mh97$8sj$1@panix2.panix.com>
Message-ID: <ge_3e.134004$dP1.471285@newsc.telia.net>

Aahz wrote:
> Note very, VERY, *VERY* carefully that the quote says nothing about
> "boring code".  The quote explicitly refers to "reams of trivial code"
> as boring -- and that's quite true.  Consider this distinction:

Thank you for this important clarification.

>     if foo == 'red':
>         print 'foo is red'
>     elif foo == 'blue':
>         print 'foo is blue'
> 
> versus
> 
>     print "foo is", foo

Is the space added automatically? (Like awk does, if you add a comma.)

> I'm sure you can think of many other examples -- real examples -- if you
> put your mind to work; Guido's point is about the essential necessity of
> refactoring and rewriting code for conciseness and clarity.

Which is a good point to make in almost any language, for code that is 
to be maintained.

Sunnan


From __peter__ at web.de  Tue Apr 26 05:30:06 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 26 Apr 2005 11:30:06 +0200
Subject: Order of elements in a dict
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <d4l1m7$iif$01$1@news.t-online.com>

Marcio Rosa da Silva wrote:

> In other words, it is safe to do:
> 
>  >>> dd = dict(zip(d.values(),d.keys()))

Yes, if the dictionary isn't modified between the invocation of values() and
keys(). Quoting http://docs.python.org/lib/typesmapping.html

"""
Keys and values are listed in an arbitrary order which is non-random, varies
across Python implementations, and depends on the dictionary's history of
insertions and deletions. If items(), keys(), values(), iteritems(),
iterkeys(), and itervalues() are called with no intervening modifications
to the dictionary, the lists will directly correspond. This allows the
creation of (value, key) pairs using zip(): "pairs = zip(a.values(),
a.keys())". The same relationship holds for the iterkeys() and itervalues()
methods: "pairs = zip(a.itervalues(), a.iterkeys())" provides the same
value for 
"""

I suppose you are aware that you lose information if multiple keys have the
same value.

Peter




From john at castleamber.com  Tue Apr 26 01:14:54 2005
From: john at castleamber.com (John Bokma)
Date: 26 Apr 2005 05:14:54 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<pan.2005.04.26.00.01.53.726156@jerf.org>
	<86ekcynqau.fsf@guru.mired.org>
Message-ID: <Xns964427CCACDcastleamber@130.133.1.4>

Mike Meyer wrote:

> Yeah, but I'm having fun. What's the point of usenet, if it's not fun?

:-D. I am always amazed how people now the opinion of "the bystanders", I 
mean, are they having secret polls I am not aware of?

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


From artem.marchenko at gmail.com  Fri Apr  8 18:52:54 2005
From: artem.marchenko at gmail.com (artem.marchenko at gmail.com)
Date: 8 Apr 2005 15:52:54 -0700
Subject: makepy generates empty file
Message-ID: <1113000774.739640.257990@l41g2000cwc.googlegroups.com>

Hi

I am trying to use makepy to generate wrappers from *.tlb for examples
for GoogleDesktopSearch SDK
(http://desktop.google.com/downloadsdksubmit). However makepy generates
only very short __init__.py and no other files.
Unfortunately, I am quite new both to Python and COM and can hardly
guess what's wrong :(
Please, help.

Here is the contents of the generated __init__.py if it helps:

# -*- coding: mbcs -*-
# Created by makepy.py version 0.4.92
# By python version 2.4 (#60, Feb  9 2005, 19:03:27) [MSC v.1310 32 bit
(Intel)]
# From type library 'GoogleDesktopComponentSample1.dll'
# On Sat Apr 09 01:48:14 2005
"""GoogleDesktopComponentSample1 1.0 Type Library"""
makepy_version = '0.4.92'
python_version = 0x20400f0

import win32com.client.CLSIDToClass, pythoncom
import win32com.client.util
from pywintypes import IID
from win32com.client import Dispatch

# The following 3 lines may need tweaking for the particular server
# Candidates are pythoncom.Missing and pythoncom.Empty
defaultNamedOptArg=pythoncom.Empty
defaultNamedNotOptArg=pythoncom.Empty
defaultUnnamedArg=pythoncom.Empty

CLSID = IID('{3921D68F-6B14-4189-BA5D-2117A9DE67B6}')
MajorVersion = 1
MinorVersion = 0
LibraryFlags = 8
LCID = 0x0

RecordMap = {
}

CLSIDToClassMap = {}
CLSIDToPackageMap = {
	'{95DA1281-AEB5-45A4-A71A-B2E57EA41E0F}' : 'IndexShortcut',
	'{452FE2BF-D9C4-43FD-9137-78AE170C3EB3}' : 'IIndexShortcut',
}
VTablesToClassMap = {}
VTablesToPackageMap = {
	'{452FE2BF-D9C4-43FD-9137-78AE170C3EB3}' : 'IIndexShortcut',
}


NamesToIIDMap = {
	'IIndexShortcut' : '{452FE2BF-D9C4-43FD-9137-78AE170C3EB3}',
}



From jaywgraves at gmail.com  Thu Apr 21 12:15:32 2005
From: jaywgraves at gmail.com (jay graves)
Date: 21 Apr 2005 09:15:32 -0700
Subject: recording data between [ and ]
In-Reply-To: <1114098800.093195.211220@o13g2000cwo.googlegroups.com>
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<1114097769.446445.70210@g14g2000cwa.googlegroups.com>
	<1114098800.093195.211220@o13g2000cwo.googlegroups.com>
Message-ID: <1114100132.484361.241410@z14g2000cwz.googlegroups.com>

Paul McGuire wrote:
> Jay -
> Thanks for the pyparsing plug.

NP.  pyparsing is on my list of stuff to play around with.  I'm just
waiting for the proper problem to present itself.

> Here is how the OP's program would look using pyparsing:

And the exact reason that I could 'plug' pyparsing is that I have read
many of your responses with sample pyparsing code.  viral marketing at
its best and another reason to love c.l.py 

...

jay



From kent37 at tds.net  Thu Apr 21 08:52:46 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 21 Apr 2005 08:52:46 -0400
Subject: Design advice for unit test asserters
In-Reply-To: <1114085180.425079.302580@z14g2000cwz.googlegroups.com>
References: <1114085180.425079.302580@z14g2000cwz.googlegroups.com>
Message-ID: <42679ddc$1_2@newspeer2.tds.net>

Gary wrote:
> I'm working on a project where I'm doing various file manipulations.
> I'm not familiar with the idioms are common or good for this situation,
> so I'd appreciate advice and suggestions.
> 
> Question 1:  A number of checks apply to a set of files.  So I'm
> wondering whether to have something like:
> 
>      def test_SomeTest(...):
>          ...
>          self.AssertAllFilesExist(fileList)
> 
> or
> 
>      def test_SomeTest(...):
>          ...
>          [ self.AssertFileExists(f) for f in fileList ]

Personally I avoid using list comprehensions with side-effects; if I don't actually want the list I 
write it out:
   for f in fileList:
     self.AssertFileExists(f)

> Question 2:  A more complicated example:  My object defines its own
> conditions that can be queried, e.g.
> 
>      def test_SomeTest(...):
>          myObject.DoSomething()
>          self._assert(myObject.isFileTypeQ(someFile))
> 
> but the parameter someFile is often an expression that should be
> encapsulated into the assertion.  This gives me two possibilities:  I
> can define a stand-alone query that takes myObject as a parameter:
> 
>      def AssertIsTypeQ(theObjectBeingTested, rawFileInfo):
>          someComputedFile = DoStuff(rawFileInfo)
>          return theObjectBeingTested.isFileTypeQ(someComputedFile)

I would write this method to actually do the assertion:
      def AssertIsTypeQ(theObjectBeingTested, rawFileInfo):
          someComputedFile = DoStuff(rawFileInfo)
          self.assert_(theObjectBeingTested.isFileTypeQ(someComputedFile))

and then call it from within various tests as:
       self.AssertIsFileTypeQ(myObject, someFile)

I think of it as extending the standard assertions with domain-specific ones.

I often write methods called checkSomething() that do a bit of work and check the result. So I might 
  actually call the above method something like checkDoStuffIsFileTypeQ().

So, the convention I use is
- write assertSomething() primitives that just check a condition
- write checkSomething() methods that do some work and check the result
- build the actual tests using the above

Kent


From joal at bigpond.net.au  Fri Apr  1 02:46:41 2005
From: joal at bigpond.net.au (Joal Heagney)
Date: Fri, 01 Apr 2005 07:46:41 GMT
Subject: New to programming question
In-Reply-To: <0_63e.19914$C7.11056@news-server.bigpond.net.au>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<0_63e.19914$C7.11056@news-server.bigpond.net.au>
Message-ID: <B%63e.19916$C7.1024@news-server.bigpond.net.au>

Oh goddammmnitttt. I seem to be doing this a lot today. Look below for 
the extra addition to the code I posted.

Joal Heagney wrote:
> 
> Here's my contribution anycase:
> 
> count = 0
> # Get first input
> name = raw_input("Guess my name: ")
> # Give the sucker two extra goes
> while count < 2:
>     # Check the value of name
>     if name == 'Ben':
>         print "You're right!"
>         break
>     else:
>         name = raw_input("Try again: ")
	  # Here's the bit I missed out.
	  count += 1
> # Of course, we haven't checked the sucker's last guess
> # so we have to do that now.
> if count == 2:
>     if name == 'Ben':
>         print "You're right!"
>     else:
>         print "No more tries for you!!!"
> 
> 
> Hope this helps.
> Joal

GRRRRRRRR.

Joal


From reinhold-birkenfeld-nospam at wolke7.net  Mon Apr 18 06:50:24 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Mon, 18 Apr 2005 12:50:24 +0200
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <4262c4b2.200399789@news.oz.net>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
	<Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>
	<4261c943.136032804@news.oz.net> <3cf2qfF6jo33oU1@individual.net>
	<4262c4b2.200399789@news.oz.net>
Message-ID: <3che4dF6o7el3U1@individual.net>

Bengt Richter wrote:
> On Sun, 17 Apr 2005 15:25:04 +0200, Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:

>>> Note that there is no problem adding other parameters, because ::<suite> is just
>>> a unary expression returning dict subtype instance, e.g.,
>>> 
>>>     y = f(11,22,**::
>>>            x = 1
>>>            y = 'y for f'
>>>         )*g(*args_from_somewhere, **::
>>>            x = 'x for g'
>>>            y = 'y for g'
>>>            def foo(): return 'foo for g'
>>>         )
>>
>>You know that this is dead ugly?
> What aspect in particular?

The '**::', for example. I would surely prefer a keyword instead of '::'.

> I.e., does this (currently legal) look prettier:
> 
>        y = f(11,22, **dict(
>               x = 1,
>               y = 'y for f'
>            ))*g(*args_from_somewhere, **dict(
>               x = 'x for g',
>               y = 'y for g',
>               foo = lambda: return 'foo for g'
>            ))

No, it doesn't. And I surely wouldn't write such code.

y = (f(11, 22, x=1, y='y for f') *
     g(*args_from_somewhere, x='x for g', y='y for g', foo=lambda: return 'foo for g'))

or, if you tolerate more lines,

y = (f(11, 22, x=1, y='y for f') *
     g(*args_from_somewhere,
       x='x for g', y='y for g',
       foo=lambda: return 'foo for g'))

would be my current way to express this. But still, the less lines,
the less confusing it is.

> Can you express the same semantics in a prettier way?
> 
> To boil it down, doesn't a suite bindings expression like
> 
>       d = ::
>           x = 1
>           y = 'y for f'    
> 
> (which in this case doesn't even need parens) seem prettier than
> 
>       d = dict(
>           x = 1,
>           y = 'y for f'
>       )
> 
> to you, especially given that (:: ...) gives you the power
> of full suite syntax to create bindings
> any way you want[1], not just keyword=<expression> ?
> (and you can leave out the commas ;-)

I understand the general idea, but still I don't like the idea of "suite expressions".
My main concern is the following: After a suite expression, where does code
follow?

As in your example:

y = f(**::
       x = 1   # indented one level, as indents can go any number of spaces
     )         # indented one level too, but differently (currently an IndentantionError)

> [1] I.e., this should work to extend the power of the type expression in a way
> that shows what you can't do with dict(...) ;-)
> 
>      type('C', (), ::
>          def __repr__(self):
>              return '<alternatively-created-class-object at %08x>'% (hex(id(self)&(2L**32-1))
>          def cname(self): return type(self).__name__
>          classvar = 123
>          # ... anything you can do in a class definition body
>      )
> 
> IMO that's pretty clean.

Uses are neat, i concur.

>>The real ``problem'' (if you see one) is that the indentation syntax
>>doesn't allow for suites in expressions.
> 
> I was trying to solve that "problem" with my "suite expressions" ;-)
> 
>    ::<suite>                  # suite bindings expression (as ordered dict)
>    def(<arglist>):<suite>     # anonymous def
>    (<arglist>):<suite>        # thunk (anonymous callable suite sharing local namespace)
> 
> I think suite indentation rules for suite expressions are not that hard, once you decide
> to deal with it as a separate indentation space from outside the expression. That's already
> done to allow multiline expressions without indentation interpretation inside bracketed expressions.
> This is just adding indentation processing within certain types of expressions ("suite expressions" ;-)
> 
> For the most part I like indentation syntax very well, and
> I suspect that if there were optional brackets, you would still be indenting
> for clarity, so the chances are the bracket version of the above would
> mainly add bracket noise to something close to the above.

I don't say brackets are better, but the problem of where to put the following code
is tricky.

Reinhold


From news at grauer-online.de  Tue Apr 12 08:51:26 2005
From: news at grauer-online.de (Uwe Grauer)
Date: Tue, 12 Apr 2005 14:51:26 +0200
Subject: database in python ?
In-Reply-To: <op.so2d8n2cqfv3if@localhost>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
Message-ID: <d3gg8b$8jv$1@online.de>

Pierre-Fr?d?ric Caillaud wrote:
> 
>> MySQL is an excellent option is very well documented.  It is also a
>> defacto standard for OpenSource databases.
> 
> 
>     MySQL sucks for anything but very very basic stuff as it supports
> no  transactions, foreign keys, procedures, triggers, concurrency, etc.
>     Postgresql is a lot better, free, and the psycopg adapter for
> Postgres is  *very very* fast (a lot faster than the MySQL one) and it
> has a  dictfetchall() method which is worth its weight in donuts !

Yes, Postgresql is a lot better than MySQL but take a look at Firebird
to see how easy a full featured db-System could be.
Use kinterbasdb from Sourceforge to get Firebird into Python.

Uwe


From news at NOwillmcguganSPAM.com  Mon Apr 18 11:16:00 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Mon, 18 Apr 2005 16:16:00 +0100
Subject: Behaviour of str.split
Message-ID: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>

Hi,

I'm curious about the behaviour of the str.split() when applied to empty 
strings.

"".split() returns an empty list, however..

"".split("*") returns a list containing one empty string.

I would have expected the second example to have also returned an empty 
list. What am I missing?


TIA,

Will McGugan


-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From dotpyFE at gmail.com  Mon Apr  4 08:10:52 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Mon, 04 Apr 2005 12:10:52 GMT
Subject: Change between Python 2.3 and 2.4 under WinXP
In-Reply-To: <mailman.1280.1112603141.1799.python-list@python.org>
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com>
	<mailman.1280.1112603141.1799.python-list@python.org>
Message-ID: <g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>

Fredrik Lundh wrote:
> Franz Steinh?usler wrote:
> 
> 
>>My second question from my last post (PyQt on Python 2.4), I think, is
>>a little got under (i have installed both Python 2.3 and Python 2.4)
>>
>>Is there any possibility under WinXP, to alterntate quickly
>>(with batch file or similary) between python23 and python24.
> 
> 
> if you want to deploy programs that depend on a specific python version,
> exemaker is your friend:
> 
>     http://effbot.org/zone/exemaker.htm
> 
> </F> 
> 
> 
> 

not to be biased toward your own products at all, or course :-)

-- 
--------------------------
Lucas Raab
lvraab"@"earthlink.net
dotpyFE"@"gmail.com
AIM:	Phoenix11890
MSN:	dotpyfe "@" gmail.com
IRC:	lvraab
ICQ:	324767918
Yahoo:	Phoenix11890


From martin at v.loewis.de  Fri Apr  1 00:31:20 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 01 Apr 2005 07:31:20 +0200
Subject: Our Luxurious, Rubinesque, Python 2.4
In-Reply-To: <1112320986.513473.79510@g14g2000cwa.googlegroups.com>
References: <1112320986.513473.79510@g14g2000cwa.googlegroups.com>
Message-ID: <424cdca8$0$21909$9b622d9e@news.freenet.de>

Larry Hastings wrote:
> Can someone tell me what made it 80% larger?  

python24.dll includes many of the extension modules that were separate
.pyd files in 2.3, namely _csv, _sre, _symtable, _winreg, datetime,
mmap, and parser, i.e. all extension modules that don't require specific
libraries. Furthermore, a few builtin modules where added to 2.4 that
were not present in 2.3 at all.

 > Also, how much would I be able to trim away if
 > I recompiled it myself?

Hard to tell. I think people have been able to get it down to 180k.

 > Is a lot of it native
> implementations of Python libraries that I might not care about
> including, or is it all fundamental VM stuff that couldn't possibly be
> removed?

No. Most of it is modules, followed by objects. Removing modules is
easy; removing objects is more difficult: while you could make a Python
interpreter easily that does not support complex numbers, it is much
harder to build a Python interpreter that does not support weak
references.

Regards,
Martin


From steve at holdenweb.com  Mon Apr 11 11:37:09 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 11 Apr 2005 11:37:09 -0400
Subject: database in python ?
In-Reply-To: <op.so2d8n2cqfv3if@localhost>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
Message-ID: <d3e5d2$qi5$1@sea.gmane.org>

Pierre-Fr?d?ric Caillaud wrote:
> 
>> MySQL is an excellent option is very well documented.  It is also a
>> defacto standard for OpenSource databases.
> 
> 
>     MySQL sucks for anything but very very basic stuff as it supports 
> no  transactions, foreign keys, procedures, triggers, concurrency, etc.
>     Postgresql is a lot better, free, and the psycopg adapter for 
> Postgres is  *very very* fast (a lot faster than the MySQL one) and it 
> has a  dictfetchall() method which is worth its weight in donuts !

While I wouldn't necessarily disagree with your assessment of the 
relative merits of those two databases your information about MySQL is 
somewhat out of date - for example, it has supported transactions for 
almost two years now.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From steve at ferg.org  Tue Apr 19 08:48:24 2005
From: steve at ferg.org (Steve)
Date: 19 Apr 2005 05:48:24 -0700
Subject: Proposal: an unchanging URL for Python documentation
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
Message-ID: <1113914904.034233.192720@z14g2000cwz.googlegroups.com>

I stand corrected.  Not only does what I wanted already exist, it seems
to exist in TWO places.  For the module index, for instance, there is

http://docs.python.org/modindex.html

and there also is

http://python.org/doc/current/modindex.html

Anybody know why there are two different URLs?

Which one should be considered the "official" current documentation
URL?  (REASON: A person wanting to Wikalong annotate the "official"
current documentation URL would want to know which one to annotate.)



From sabbey at u.washington.edu  Sun Apr 17 22:56:10 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sun, 17 Apr 2005 19:56:10 -0700
Subject: pre-PEP: Simple Thunks
In-Reply-To: <3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
	<3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
Message-ID: <Pine.A41.4.61b.0504171920010.34498@dante69.u.washington.edu>

Ron_Adam wrote:

>> def pickled_file(thunk, name):
>>  	f = open(name, 'r')
>>  	l = pickle.load(f)
>>  	f.close()
>>  	thunk(l)
>>  	f = open(name, 'w')
>>  	pickle.dump(l, f)
>>  	f.close()
>>
>> Now I can re-use pickled_file whenever I have to modify a pickled file:
>>
>> do data in pickled_file('pickled.txt'):
>>  	data.append('more data')
>>  	data.append('even more data')
>>
>> In my opinion, that is easier and faster to write, more readable, and less
>> bug-prone than any non-thunk alternative.
>>
>
> The above looks like it's missing something to me. How does 'data'
> interact with 'thunk(l)'?  What parts are in who's local space?

Your example below explains it well, with 'data' renamed as 'L'.  The 
scope of bindings are the same in both examples, with the exception that 
'data' is in the outermost namespace in the above example, and 'L' is 
local to the function 'data_append' in the below example.

> This might be the non-thunk version of the above.

yes

> def pickled_file(thunk, name):
> 	f = open(name, 'r')
> 	l = pickle.load(f)
> 	f.close()
> 	thunk(l)
> 	f = open(name, 'w')
> 	pickle.dump(l, f)
> 	f.close()
>
> def data_append(L):
> 	L.append('more data')
> 	L.append('still more data')
>
> pickled_file(data_append, name)
>
> I don't think I would do it this way.  I would put the data
> list in a class and add a method to it to update the pickle file. Then
> call that from any methods that update the data list.

I also wouldn't do it that way.  I don't see a class as being much better, 
though.  If I understand you correctly, with classes you would have 
something like:

p = Pickled('pickled.txt')
p.load()
p.data.append('more data')
p.data.append('even more data')
p.dump()

This has the same issues as with opening and closing files:  losing the 
'dump', having to always use try/finally if needed, accidentally 
re-binding 'p', significantly more lines.  Moreover, class 'Pickled' won't 
be as readable as the 'pickled_file' function above since 'load' and 
'dump' are separate methods that share data through 'self'.

The motivation for thunks is similar to the motivation for generators-- 
yes, a class could be used instead, but in many cases it's more work than 
should be necessary.

-Brian


From danb_83 at yahoo.com  Wed Apr 13 07:07:59 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 13 Apr 2005 04:07:59 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
Message-ID: <1113390479.738210.49530@z14g2000cwz.googlegroups.com>

Dick Moores wrote:
> I need to figure out how to compute pi to base 12, to as many digits
as
> possible. I found this reference,
<http://mathworld.wolfram.com/Base.html>,
> but I really don't understand it well enough.

How many stars are in "*************************"?

You probably answered "25".  This means that, for convenience, you've
broken down the row of stars into ********** + ********** + *****, that
is, 2 tens with 5 left over, which the base-10 numeral system denotes
as "25".

But there's no reason other than tradition why you should arrange them
into groups of 10.  For example, you could write it as ******** +
******** + ******** + *, or 3 eights plus 1.  In octal (base-8)
notation, this is written as "31"; the "tens" place in octal represents
eights.

In general, in the base-r numeral system, the nth digit to the left of
the ones digit represents r^n.  For example, in the binary number
11001, the place values for each digit are, right to left, 1, 2, 4, 8,
and 16, so the number as a whole represents
1?16+1?8+0?4+0?2+1?1=16+8+1=25.  This analogous to 25=2?10+5 in
base-10.

It's also possible to write it as 3?8+0?4+0?2+1?1 = 3001 base 2,
but by convention, base-r only uses the digits in range(r).  This
ensures a unique represenation for each number.  This makes "11001" the
unique binary representation for decimal 25.

Note that for bases larger than 10, the digits will be numbers that are
not single digits in base 10.  By convention, letters are used for
larger digits: A=10, B=11, C=12, ... Z=35.  For example, the number
(dec) 2005 = 1?12?+1?12?+11?12+1?1 is represented in base-12 by
"11B1".

Fractions are handled in a similar manner.  The nth place to the right
of the radix point (i.e., the "decimal point", but that term is
inaccurate for bases other than ten) represents the value radix**(-n).

For example, in binary,
0.1 = 1/2 = dec. 0.5
0.01 = 1/4 = dec. 0.25
0.11 = 1/2 + 1/4 = 3/4 = dec. 0.75
0.001 = 1/8 = dec. 0.125
0.01010101... = 1/4 + 1/16 + 1/64 + ... = 1/3
0.0001100110011... = 1/10 = dec. 0.1

The last row explains why Python gives:

>>> 0.1
0.10000000000000001

Most computers store floating-point numbers in binary, which doesn't
have a finite representation for one-tenth.  The above result is
rounded to 53 signficant bits
(1.100110011001100110011001100110011001100110011010?2^-4), which is
exactly equivalent to decimal
0.1000000000000000055511151231257827021181583404541015625, but gets
rounded to 17 significant digits for display.

Similarly, in base-12:

0.1 = 1/12
0.14 = 1/12 + 4/144 = 1/9
0.16 = 1/12 + 6/144 = 1/8
0.2 = 2/12 = 1/6
0.3 = 3/12 = 1/4
0.4 = 4/12 = 1/3
0.6 = 6/12 = 1/2
0.8 = 8/12 = 2/3
0.9 = 9/12 = 3/4
0.A = 10/12 = 5/6

Notice that several common fractions have simpler representations in
base-12 than in base-10.  For this reason, there are people who believe
that base-12 is superior to base-10.
(http://www.dozenalsociety.org.uk)

> Could someone show me how to do what I need?

You'll need 3 things:

(1) An algorithm for computing approximations of pi.

The simplest one is 4*(1-1/3+1/5-1/7+1/9-1/11+...), which is based on
the Taylor series expansion of 4*arctan(1).

There are other, faster ways.  Search Google for them.

(2) An unlimited-precision numeric representation.  The standard
"float" isn't good enough: It has only 53 bits of precision, which is
only enough for 14 base-12 digits.

The "decimal" module will probably work, although of course its base-10
internal representation will introduce slight inaccuracies.

(3) A function for converting numbers to their base-12 representation.

For integers, this can be done with:

DIGITS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
def itoa(num, radix=10):
   is_negative = False
   if num < 0:
      is_negative = True
      num = -num
   digits = []
   while num >= radix:
      num, last_digit = divmod(num, radix)
      digits.append(DIGITS[last_digit])
   digits.append(DIGITS[num])
   if is_negative:
      digits.append("-")
   digits.reverse()
   return ''.join(digits)

For a floating-point number x, the representation with d "decimal"
places count be found by taking the representation of int(round(x *
radix ** d)) and inserting a "." d places from the right.



From opengeometry at yahoo.ca  Sat Apr 16 22:16:04 2005
From: opengeometry at yahoo.ca (William Park)
Date: Sun, 17 Apr 2005 02:16:04 GMT
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
Message-ID: <EFj8e.809$E57.495@fe51.usenetserver.com>

Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
> I want to parse a very large (2.4 gig) XML file (bioinformatics
> ofcourse :)) But I have no clue how to do that. Most things I see read
> the entire xml file at once. That isn't going to work here ofcourse.
> 
> So I would like to parse a XML file one record at a time and then be
> able to store the information in another object.  How should I do
> that?
> 
> Thanks in advance,
> 
> Willem Ligtenberg A total newbie to python by the way.

You may want to try Expat (www.libexpat.org) or Python wrapper to it.
You can feed small piece at a time, say by lines or whatever.  Of
course, it all depends on what kind of parsing you have in mind. :-)

Care to post more details?

-- 
William Park <opengeometry at yahoo.ca>, Toronto, Canada
Slackware Linux -- because it works.



From merkosh at hadiko.de  Thu Apr 28 19:15:30 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Fri, 29 Apr 2005 01:15:30 +0200
Subject: anonymous function objects?
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
Message-ID: <d4rqql$54e$1@news2.rz.uni-karlsruhe.de>

Friday 29 April 2005 00:06 am Paul Rubin wrote:
> Closest you can come is:
> 
>    f = lambda: sys.stdout.write("hello world\n")
 
Ah. :))
Why does the "print" statement return a syntax error here?

>>> lambda: print("hallo")
  File "<stdin>", line 1
    lambda: print("hallo")
                ^
SyntaxError: invalid syntax

> Of course if you're trying to capture the function in a named variable
> like f, just use a def statement.

Unfortunately I want to assign a handler function to an object and something
like this does not work:

>>> class Foobar(object): pass
...
>>> a = Foobar()
>>> def a.handler():
  File "<stdin>", line 1
    def a.handler():
         ^
SyntaxError: invalid syntax

But wrapping print into a myprint function works :)


Thanks,
Ciao
Uwe     


From sm.synonymous at gmail.com  Sun Apr 17 21:12:19 2005
From: sm.synonymous at gmail.com (Synonymous)
Date: 17 Apr 2005 18:12:19 -0700
Subject: Pattern Matching Given # of Characters and no String Input;
	use RegularExpressions?
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
	<42623ba8$0$10322$636a15ce@news.free.fr>
Message-ID: <ae0b1ff7.0504171712.731fabd3@posting.google.com>

tiissa <tiissa at nonfree.fr> wrote in message news:<42623ba8$0$10322$636a15ce at news.free.fr>...
> tiissa wrote:
> > If you know the number of characters to match can't you just compare 
> > slices?
> If you don't, you can still do it by hand:
> 
> In [7]: def cmp(s1,s2):
>    ....:     diff_map=[chr(s1[i]!=s2[i]) for i in range(min(len(s1), 
> len(s2)))]
>    ....:     diff_index=''.join(diff_map).find(chr(True))
>    ....:     if -1==diff_index:
>    ....:         return min(len(s1), len(s2))
>    ....:     else:
>    ....:         return diff_index
>    ....:
> 
> In [8]: cmp('cccat','cccap')
> Out[8]: 4
> 
> In [9]: cmp('ccc','cccap')
> Out[9]: 3
> 
> In [10]: cmp('cccat','dddfa')
> Out[10]: 0

I will look at that, although if i have 300 images i dont want to type
all the comparisons (In [9]: cmp('ccc','cccap')) by hand, it would
just be easier to sort them then :).

I got it somewhat close to working in visual basic:

If Left$(Cells(iRow, 1).Value, Count) = Left$(Cells(iRow - 1,
1).Value, Count) Then

What it says is when comparing a list, it looks at the 'Count' left
number of characters in the cell and compares it to the row cell
above's 'Count' left number of characters and then does the task (i.e.
makes a directory, moves the files) if they are equal.

I will look for a Left$(str) function that looks at the first X
characters for python :)).

Thank you for your help!

Synonymous


From mwm at mired.org  Sat Apr 23 21:22:03 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 23 Apr 2005 20:22:03 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
Message-ID: <863bthrmtg.fsf@guru.mired.org>

John Bokma <postmaster at castleamber.com> writes:

> Mike Meyer wrote:
>
>> "Simon John" <simoninusa2001 at yahoo.co.uk> writes:
>> 
>>> I still love Perl, it's a bit of an art form, as "there's more than
>>> one way to do it", whereas Python usually only allows one way to do
>>> it, which may or may not be a better mantra....
>> 
>> The Python mantra leads to 1) less programmer overhead, and 2) faster
>> improvements in the language.
>> 
>> To be a Perl expert, you have to know which of the many ways to do
>> various things is the fasted under what conditions.
>
> Why?

One of the stated conditions for more than one Perl position I've
looked at.

>> Python programmers
>> seldom have to worry about that - there's usually only one [obvious]
>> way to do things, so you just do it that way.
>
> I doubt that :-D. I have never seen a programming language that forced
> me in such a way :-D. 

I'd say you haven't seen a lot of languages - including Python. COBOL,
Eiffel, Rexx, Scheme, APL and a few others come to mind as "there's
usually only one way to do things". Python is one of them.

As a programmer, I find this very *freeing*. I can quite worrying
about implementation minutia - just do things the obvious way - and
worry instead about the "big picture"

>> Having only one obvious way
> I doubt that too ;-)

Try programming in older Python for a while. You'll quit doubting it.

>> to do things means developers only have to
>> worry about impact on that way when making improvements, which will
>> speed them up.
> Yeah, Perl programmers are extremely slow ;-)

Nah, they aren't slow. They just have to worry about more things than
the Python developers.

>> The problem these days is that there are now multiple ways to do a
>> variety of things, because we have the "new, pythonic" way and the
>> "old, backwards-compatible way". So it's no longer clear which is the
>> fastest -
> In most cases, why worry? If speed is an issue you should probably have
> picked a different programming language in the first place (for that
> part of the code). 

You apparently haven't been programming in Python very long. If speed
is an issue, you should probably pick a different
algorithm. Well-written Python programs use the C-coded parts of
Python for the time-critical part of the code.

>> and in the case of generators versus list comprehensions,
>> it's not clear which you should be using. To bad.
> Use the one that is the easiest to read and understand by yourself.
> That's how I program Perl, and that's how I am going to program Python. 

The thing is, in Python there usually is one obvious way to do
things. That's changed in recent years as improvements have been added
without dropping the features they replaced so as not to break old
programs.

> An overloaded toolbox doesn't mean that if you have to hang a painting
> on the wall that you have to think for 6 hours which tool you should
> use. You just take the one that does the job in a way you feel
> comfortable with. I know that the Perl mantra is often misunderstood,
> but in my experience only by people who have very little experience with
> the language. 

The problem with using "the way you feel comfortable with" is that it
may not be comfortable for the maintainer - even if that's you six
months from now. My Perl evolved from very shell script like (lots of
backticks and passing around the full text of files) to one more
C-like as I used the language. That change was largely driven by
performance concerns as my understanding of the language grew.

            <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From __peter__ at web.de  Tue Apr 19 03:31:53 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 19 Apr 2005 09:31:53 +0200
Subject: Enumerating formatting strings
References: <mailman.2061.1113855968.1799.python-list@python.org>
Message-ID: <d42c4q$f8f$01$1@news.t-online.com>

Steve Holden wrote:

> I was messing about with formatting and realized that the right kind of
> object could quite easily tell me exactly what accesses are made to the
> mapping in a string % mapping operation. This is a fairly well-known
> technique, modified to tell me what keys would need to be present in any
> mapping used with the format.

...

> I've been wondering whether it's possible to perform a similar analysis
> on non-mapping-type format strings, so as to know how long a tuple to
> provide, or whether I'd be forced to lexical analysis of the form string.

PyString_Format() in stringobject.c determines the tuple length, then starts
the formatting process and finally checks whether all items were used -- so
no, it's not possible to feed it a tweaked (auto-growing) tuple like you
did with the dictionary.

Here's a brute-force equivalent to nameCount(), inspired by a post by Hans
Nowak (http://mail.python.org/pipermail/python-list/2004-July/230392.html).

def countArgs(format):
    args = (1,) * (format.count("%") - 2*format.count("%%"))
    while True:
        try:
            format % args
        except TypeError, e:
            args += (1,)
        else:
            return len(args)
            
samples = [
    ("", 0),
    ("%%", 0),
    ("%s", 1),
    ("%%%s", 1),
    ("%%%*.*d", 3),
    ("%%%%%*s", 2),
    ("%s %*s %*d %*f", 7)]
for f, n in samples:
    f % ((1,)*n) 
    assert countArgs(f) == n    

Not tested beyond what you see.

Peter



From martin at v.loewis.de  Tue Apr 12 17:30:54 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 12 Apr 2005 23:30:54 +0200
Subject: ./pyconfig.h?
In-Reply-To: <slrnd5nbi9.ckm.mlh@selje.idi.ntnu.no>
References: <slrnd5nbi9.ckm.mlh@selje.idi.ntnu.no>
Message-ID: <425c3e0d$0$25787$9b622d9e@news.freenet.de>

Magnus Lie Hetland wrote:
> It seems that in my Solaris installation,
> sysconfig.get_config_h_filename() returns './pyconfig.h', which is, of
> course, in most cases just wrong... :)
> 
> Shouldn't this return an absolute path (in all cases)? 

It should, and it does indeed on my copy of Python on Solaris.

> I've use an
> absolute path in the --prefix of ./configure -- but I guess I was
> standing in that very directory when compiling; maybe there's some
> mix-up there?

Did you "make install" also? Are you sure you are invoking python
in <prefix>/bin?

Regards,
Martin



From tero.vantanen at poista.wlanmail.com.invalid  Sun Apr 24 11:44:52 2005
From: tero.vantanen at poista.wlanmail.com.invalid (=?ISO-8859-1?Q?T_V=E4nt=E4nen?=)
Date: Sun, 24 Apr 2005 18:44:52 +0300
Subject: Variables
In-Reply-To: <mailman.2364.1114309608.1799.python-list@python.org>
References: <mailman.2364.1114309608.1799.python-list@python.org>
Message-ID: <426bbef5$0$17154$39db0f71@news.song.fi>

Richard Blackwood wrote:
> To All:
> 
>    Folks, I need your help. I have a friend who claims that if I write:
> 
> foo = 5
> 
> then foo is NOT a variable, necessarily. If you guys can define for me 
> what a variable is and what qualifications you have to back you, I can 
> pass this along to, hopefully, convince him that foo is indeed a variable.
> 
> Thanks all!
> 
> Richard B.

For example in physics formula for falling object distance:
d = (1/2)*g*t^2

In physics (math) d and t are variables and g is a constant. When you 
start to calculate the distance you assign some values to the variables, 
you  cant touch the constant - thats the meaning of something being 
constant. Or is g constant or variable?

Math:
For example if we want to visualize the speed of the object from 0 to 10 
seconds we need to calculate some values to d/t graph. You do this:
t = 0, calculate d
t = 1, calculate d
...
t = 10, ...

In math you maybe call that t and d are constants, but those are 
constants only for one calculation.

Programming:
In python we'd do:
---
g = 9.81
for t in range(0, 11):
     d = 0.5 * 9.81 * t
     print 't=%s d=%s' %(t, d)
---
it prints out:
0: 0.0
1: 4.905
2: 9.81
3: 14.715
4: 19.62
5: 24.525
6: 29.43
7: 34.335
8: 39.24
9: 44.145
10: 49.05

Constant is "variable which value is same through the program 
execution", variable value can change. Knowing value of variable doesn't 
make it constant.

Vocabulary and notation varies. Electric engineers might talk about 
generator, in candyshop there are surely lots of wrappers, and both 
soldiers and surgeons plan and execute operations.

HTH


From uche.ogbuji at gmail.com  Sat Apr 23 15:48:49 2005
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: Sat, 23 Apr 2005 13:48:49 -0600
Subject: XML file parsing with SAX
In-Reply-To: <pan.2005.04.23.13.19.59.910355@gmail.com>
References: <pan.2005.04.23.13.19.59.910355@gmail.com>
Message-ID: <1114285730.7121.92.camel@borgia>

On Sat, 2005-04-23 at 15:20 +0200, Willem Ligtenberg wrote:
> I decided to use SAX to parse my xml file.
> But the parser crashes on:
>   File "/usr/lib/python2.3/site-packages/_xmlplus/sax/handler.py", line 38, in fatalError
>     raise exception
> xml.sax._exceptions.SAXParseException: NCBI_Entrezgene.dtd:8:0: error in processing external entity reference
> 
> This is caused by:
> <!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN"
> "NCBI_Entrezgene.dtd">
> 
> If I remove it, it parses normally.
> I've created my parser like this:
> import sys
> from xml.sax import make_parser
> from handler import EntrezGeneHandler
> 
> fopen = open("mouse2.xml", "r")
> ch = EntrezGeneHandler()
> saxparser = make_parser()
> saxparser.setContentHandler(ch)
> saxparser.parse(fopen)
> 
> And the handler is:
> from xml.sax import ContentHandler
> 
> class EntrezGeneHandler(ContentHandler):
> 	"""
> 	A handler to deal with EntrezGene in XML
> 	"""
> 	
> 	def startElement(self, name, attrs):
> 		print "Start element:", name
> 
> So it doesn't do much yet. And still it crashes...
> How can I tell the parser not to look at the DOCTYPE declaration.
> On a website:
> http://www.devarticles.com/c/a/XML/Parsing-XML-with-SAX-and-Python/1/
> it states that the SAX parsers are not validating, so this error shouldn't
> even occur?

Just because it's not validating doesn't mean that the parser won't try
to read the external entity.

Maybe you're looking for 

"""
feature_external_ges
        Value: "http://xml.org/sax/features/external-general-entities" 
        true: Include all external general (text) entities. 
        false: Do not include external general entities. 
        access: (parsing) read-only; (not parsing) read/write
"""

Quote from:

http://docs.python.org/lib/module-xml.sax.handler.html

But you're on pretty shaky ground in any XML 1.x toolkit using a bogus
DTDecl in this way.  Why go through the hassle?  Why not use a catalog,
or remove the DTDecl?


-- 
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Use CSS to display XML, part 2 - http://www-128.ibm.com/developerworks/edu/x-dw-x-xmlcss2-i.html
XML Output with 4Suite & AMara - http://www.xml.com/pub/a/2005/04/20/py-xml.html
Use XSLT to prepare XML for import into OpenOffice Calc - http://www.ibm.com/developerworks/xml/library/x-oocalc/
Schema standardization for top-down semantic transparency - http://www-128.ibm.com/developerworks/xml/library/x-think31.html



From tlviewer at yahoo.com  Fri Apr  1 21:22:34 2005
From: tlviewer at yahoo.com (tlviewer)
Date: Sat, 02 Apr 2005 02:22:34 GMT
Subject: (win32) speedfan api control
Message-ID: <Kln3e.13905$e06.7165@twister.socal.rr.com>

hello,

If you run the Mainboard monitor, speedfan, here is
an ActivePython script to force automatic fan control.
????????http://www.almico.com/speedfan.php

It's a great example of how clean the WinApi interface is
in ActivePython. The script sets focus to the checkbox of
interest and toggles the checkbox. AFAIK, speedfan will only
start without fan control, requiring the user to manually
check the checkbox to turn it on. 

hope someone finds it useful,
tlviewer

#!/usr/bin/python
# author: tlviewer at yahoo.com 
# date: April 1, 2005
# description: turn on SpeedFan automatic fan speed
# keywords: speedfan readings
#import win32api as ap 

import win32gui as wi
import win32ui as ui
import win32con as wc

# dialog class name
cl = "TJvXPCheckbox"

try:
????hWnd?=?wi.FindWindowEx(?0,?0,?"TForm1",?"SpeedFan?4.20")?
????print?hWnd?
????hWnd?=?wi.FindWindowEx(?hWnd,?0,?"TPageControl",?"")??
????print?hWnd
????hWnd?=?wi.FindWindowEx(?hWnd,?0,?"TTabSheet",?"Readings")
????print?hWnd
????hWnd?=?wi.FindWindowEx(?hWnd,?0,?cl,?"Automatic?fan?speed")
????
????print?hWnd
????res?=?wi.SetForegroundWindow(hWnd)
????res=wi.SendMessageTimeout(hWnd,wc.WM_LBUTTONDOWN,wc.MK_LBUTTON,0,2,75)??
????res?=?wi.SendMessageTimeout(?hWnd,wc.WM_LBUTTONUP,?0,?0,?2,?75?)?
????print?res
except:
????pass
#end code


From reinhold-birkenfeld-nospam at wolke7.net  Wed Apr 20 10:52:55 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Wed, 20 Apr 2005 16:52:55 +0200
Subject: goto statement
In-Reply-To: <d45kgl$f16$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<3cmuqpF6km9ruU1@individual.net>
	<d45kgl$f16$1@news.tsystems.kiev.ua>
Message-ID: <3cn8m7F6ppkc3U3@individual.net>

Maxim Kasimov wrote:
>> 
>> Use multi-line string literals.
>> 
>> '''
> 
> it will not help if there is another ''' or/and """ inside of code block

Yes, but how often do you use them? And aren't you consistent in the choice
of your quotes?

>> This whole 'code' is "commented out", and you can
>> use every type of """quote""" except three singles.
>> 
>> '''
>> 
>> Or, if you really like the spirit of goto,
>> use "if 0:".
> 
> ... and add tabs to each string

Yes. Where's the problem?

M-x indent-region-ly yours,
Reinhold


From donn at u.washington.edu  Fri Apr 15 11:43:24 2005
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 15 Apr 2005 08:43:24 -0700
Subject: Determine ip address
References: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
	<mailman.1959.1113571156.1799.python-list@python.org>
Message-ID: <donn-99C627.08432415042005@gnus01.u.washington.edu>

In article <mailman.1959.1113571156.1799.python-list at python.org>,
 Simon Brunning <simon.brunning at gmail.com> wrote:

> On 15 Apr 2005 06:03:06 -0700, codecraig <codecraig at gmail.com> wrote:
> > hi,
> >    how can i use python to figure the ip address of the machine which
> > the python script is running on?  I dont mean like 127.0.0.1....but i
> > want the external IP address (such as ipconfig on windows displays).
> 
> On Windows, this works:
> 
> socket.gethostbyname(socket.gethostname())
> 
> Is that OK on real operating systems too?

It will work sometimes, but there is nothing I know of
that specifically distinguishes "the" external network.
If you want something that reliably finds a network that
will be used for a certain type of connection, then the
best thing to do is make a connection like that, and
inspect the results.  The getsockname() method shows the
IP address.

   Donn Cave, donn at u.washington.edu


From henrikpierrou at hotmail.com  Tue Apr 19 10:01:10 2005
From: henrikpierrou at hotmail.com (henrikpierrou at hotmail.com)
Date: 19 Apr 2005 07:01:10 -0700
Subject: Extending base class methods
Message-ID: <1113919270.802463.54310@l41g2000cwc.googlegroups.com>

Hi,

I am trying to extend an overridden base class method (printer) by
printing some extra fields and then calling the base class method.
Extract from the python tutorial:

'An overriding method in a derived class may in fact want to extend
rather than simply replace the base class method of the same name.
There is a simple way to call the base class method directly: just call
"BaseClassName.methodname(self, arguments)". '


Any ideas why this does not work? I get the error "TypeError: unbound
method printer() must be called with Field_Collection instance as first
argument (got MSD instance instead)"):


#=====================================================================================
class Field_Collection:
    fieldList = []

    def add(self, name, size, compression, responseValue, value,
description):
        self.fieldList.append( Field(name, size, compression,
responseValue, value, description) )

    def update(self):
        print "updating field"

    def get(self):
        print "getting field"

    def printer(self):
        for x in self.fieldList:
            x.printer()


#=====================================================================================


class MSD(Field_Collection):
    standard = ""
    decField = ""

    def printer(self):
        print "Standard: " + self.standard
        print "decField: " + self.decField
        Field_Collection.printer(self)

#=====================================================================================

w2k, python 2.3



From steven.bethard at gmail.com  Wed Apr 13 00:28:12 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 12 Apr 2005 22:28:12 -0600
Subject: singleton objects with decorators
In-Reply-To: <mailman.1812.1113353284.1799.python-list@python.org>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>	<425c3823.221291079@news.oz.net>
	<mailman.1812.1113353284.1799.python-list@python.org>
Message-ID: <QP2dnXvbuYtHAsHfRVn-ig@comcast.com>

James Stroud wrote:
> Other than using modules, I thought @classmethod took care of this kind of 
> need:
> 
> class SingleThing:
>   some_values = {"fanciness":0}
>   def __init__(self):
>     raise Exception, "not enough preceding stars to be fancy enough"
>   @classmethod
>   def why_so_fancy(self):
>     print "why make every thing so fancy?"
> 
> I call this pattern:
> 
> "Using a Class to Be Something Single Because It Already Is Single"
> 
> or "uactbssbiais", for short.

+1 VOTW (Vocabulation of the Week)

=)

STeVe


From danb_83 at yahoo.com  Wed Apr  6 22:18:42 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 6 Apr 2005 19:18:42 -0700
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<6p1951pop1pfh3j57r7gg568cn3bo4c7lg@4ax.com>
	<7xr7hn8jba.fsf@ruckus.brouhaha.com>
Message-ID: <1112840322.551627.7410@o13g2000cwo.googlegroups.com>

Paul Rubin wrote:
> John Machin <sjmachin at lexicon.net> writes:
...
> > 3. Of what practical use (or even esoteric academic interest) is
the
> > parity of the number of interchanges?
>
> It is of considerable interest in combinatorics.  The group of even
> permutations on N elements is called the alternating group A(N).
> It's an order-2 subgroup of the symmetric group S(N) which is the
> group of all the permutations on N elements.  The odd permutations
> are of course a coset of A(N).

It's also used in linear algebra, as part of the definition of the
determinant.



From bokr at oz.net  Sun Apr 24 03:17:47 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 24 Apr 2005 07:17:47 GMT
Subject: Variables
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b255d.375304108@news.oz.net>
	<mailman.2379.1114319143.1799.python-list@python.org>
Message-ID: <426b36e1.379788376@news.oz.net>

On Sun, 24 Apr 2005 00:59:45 -0400, Richard Blackwood <richardblackwood at cloudthunder.com> wrote:

>Bengt Richter wrote:
>
>>On Sat, 23 Apr 2005 22:45:14 -0400, Richard Blackwood <richardblackwood at cloudthunder.com> wrote:
>>
>>  
>>
>>>Robert Kern wrote:
>>>
>>>    
>>>
>>>>Richard Blackwood wrote:
>>>>
>>>>      
>>>>
>>>>>To All:
>>>>>
>>>>>   Folks, I need your help. I have a friend who claims that if I write:
>>>>>
>>>>>foo = 5
>>>>>
>>>>>then foo is NOT a variable, necessarily. If you guys can define for 
>>>>>me what a variable is and what qualifications you have to back you, I 
>>>>>can pass this along to, hopefully, convince him that foo is indeed a 
>>>>>variable.
>>>>>        
>>>>>
>>>>None of us can do that unless you tell us what he thinks the word 
>>>>"variable" means. The terminology is a bit fluid. I suspect that your 
>>>>friend applying a somewhat restricted notion of "variable" that 
>>>>coincides with the behavior of variables in some other language.
>>>>
>>>>      
>>>>
>>>Indeed, this language is math. My friend says that foo is a constant and 
>>>necessarily not a variable. If I had written foo = raw_input(), he would 
>>>say that foo is a variable. Which is perfectly fine except that he 
>>>insists that since programming came from math, the concept of variable 
>>>is necessarily the identical. This can not be true. For example, I may 
>>>define foo as being a dictionary, but I can not do this within math 
>>>because there is no concept of dictionaries within mathematics; yet foo 
>>>is a variable, a name bound to a value which can change.
>>>    
>>>
>>
>>Maybe he doesn't know that foo = 5 in Python is not an equation as in math,
>>but a Python source language statement to be translated to a step in some
>>processing sequence.
>>
>>Tell him in Python foo is a member of one set and 5 is a member of another,
>>and foo = 5 expresses the step of putting them into correspondence
>>to define a mapping, not declaring them equal.
>>  
>>
>Could I honestly argue this to him? From what basis do I argue that it 
>is not an equation? In any event, he would likely (passionately) 
>disagree considering his notion that programming is an off-shoot of math 
>and thus at the fundamental level has identical concepts and rules.
And that is supposed to mean that "x" in any context must be taken as "x"
in the context of whatever math book he's thumping? A program source text
is not (or rarely ;-) a mathematical proof text. You run the texts through
different interpreters. The interpreters make the difference between x=5 and x=5 ;-)

Apparently your friend has only one 'x'-interpreter at his disposal in his mind,
or he is pushing one like an off-line troll. He is trying to run a Python
program with his math interpreter, not the python interpreter.

>Believe it or not, he used to be a programmer. Back in the day (while I 
>was getting my PhD in philosophy), he was a employed programmer using 
>Cobol, Fortran, and other languages like that. Did his seemingly 
>peculiar definition of variable exist at that time?
Sure, there have always been people attached to peculiar definitions.
People fall in love with patterns of limited-applicability partial truth,
because it serves to simplify their perceived world, and may actually
fit experience of a limited part of the world well for a time,
which reinforces confidence, and they can act without too much thinking.
Altering the pattern to fit a more complex reality is mental work
and a threat to comfort, and possibly self esteem, depending on how they
relate to their ideas. If they think of their concepts as personally as tattoos,
they may not like your ideas for revisions. But if they think of ideas
as more or less serviceable reality-maps being drawn and revised
as you go, they will be more than happy to compare maps and talk about
the adventure of the pigrimage and what good exercise it is ;-)

>
>>Even in math notation, ISTM important to distinguish between
>>a finger and what it may for the moment be pointing at.
>
Does your friend distinguish between the "x" on the page where
he has written his math equation, and whatever he thinks of when
he interprets the "x"? When he says, "x" is <whatever>, what "x"
is he talking about? Does he realize how many distinctions can be made?

Maybe it's time to change the subject ;-)

Regards,
Bengt Richter


From mwm at mired.org  Mon Apr 25 17:19:23 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 16:19:23 -0500
Subject: what is the best way to determine system OS?
References: <1114436211.942212.203790@f14g2000cwb.googlegroups.com>
	<868y37osc7.fsf@guru.mired.org> <hpivj2-lh1.ln1@lairds.us>
Message-ID: <86y8b6o8pw.fsf@guru.mired.org>

claird at lairds.us (Cameron Laird) writes:

> In article <868y37osc7.fsf at guru.mired.org>, Mike Meyer  <mwm at mired.org> wrote:
>>What you should do instead is check on how to use the features you
>>want. If you watch a typical autoconf script, you'll see it groveling
>>through libraries, include files, and various directories looking for
>>subroutines, defines and commands. That's the idea, but without
>>knowing which features you're looking for, I can't say how you would
>>check for them.
[...]
> Not for me.
> Briefly, use of autoconf is FAR from a guarantee that everything works
> right when starting with a new flavor.

You're right - it's not a guarantee that everything works
right. Nothing is perfect. You may run into something that you haven't
dealt with before. Or you may run into a file that you're using as an
indicator that contains information in a totally different format than
you expect. Both of those will break both technics. Checking for
features just gives you the possibility of success on a new
platform. You don't have that if you check for platform name.

Autoconf does things the way it does for a reason. Back before
autoconf (when dinosaurs walked the earth, etc.) people made systems
portable in a variety of ad hoc ways. Those that checked for
particular features tended to be more portable/robust than those that
checked for system name and tweaked everything depending on that. They
were also easier to port to new platforms, as the first step in the
porting process - figuring out what features the platform didn't
provide - was already done.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From pellis.no.spam at tampabay.rr.com  Sat Apr 30 00:22:56 2005
From: pellis.no.spam at tampabay.rr.com (Patrick Ellis)
Date: Sat, 30 Apr 2005 04:22:56 GMT
Subject: Fast plotting?
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
	<5bbea$42706a5a$d1b714b9$22961@PRIMUS.CA>
	<5Fhce.28061$5f.13056@tornado.tampabay.rr.com>
	<1114816441.914714.124600@f14g2000cwb.googlegroups.com>
Message-ID: <AKDce.18659$716.7650@tornado.tampabay.rr.com>

jdh2358 at gmail.com <jdh2358 at gmail.com> typed:
> Are you sure about these numbers?  Most monitors refresh at 70-80Hz,
> so unless you have special display hardware, I'm suspicious of these
> numbers doubt .  I once had a user post to the matplotlib mailing list
> that xplt was refreshing at 1000 Hz.  I think xplt drops plot requests
> while requests are in the queue, so many of the loops in his iteration
> were simply dropped.  If the plotting library puts draw requests in an
> idle event handler, accurate refresh rate numbers can be hard to
> quantify.
>
> JDH

dislin doesn't seem to do that. I varied the number of points in the plot so
the drawing rate went from from 60 Hz to 144 Hz. It scaled linearly above
and below my 85 Hz screen rate. It wouldn't do that if it were dropping
plots. I think that computers are so fast that they can draw to the frame
buffer very quickly, but the slower screen refresh means only some of those
fully drawn frames make it to the monitor.

Even if you are correct, that is still drawing at 85 Hz and thus much faster
than the original poster needed.





From jjl at pobox.com  Fri Apr  1 14:51:33 2005
From: jjl at pobox.com (John J. Lee)
Date: 01 Apr 2005 19:51:33 +0000
Subject: AttributeError: 'module' object has no attribute
	'setdefaulttimeout'
References: <1112281665.373148.232100@z14g2000cwz.googlegroups.com>
	<d2h51g$bl0$02$1@news.t-online.com>
	<mailman.1147.1112293775.1799.python-list@python.org>
Message-ID: <873buae0my.fsf@pobox.com>

Steve Holden <steve at holdenweb.com> writes:

> Peter Otten wrote:
> > adrian wrote:
> >
> >>urllib.socket.setdefaulttimeout(self.timeout)
> >>AttributeError: 'module' object has no attribute 'setdefaulttimeout'
> > socket.setdefaulttimeout() was added in Python 2.3. You need to
> > upgrade.
> > Peter
> >
> Alternatively you might still be ablet o get Tom O'Malley's
> tiemoutsocket module, which I used in several applications until 2.3
> integrated the functionality.

I seem to recall a bug related to sendall(), though, IIRC. I reported
it, but it didn't get fixed, again IIRC.


John


From steven.bethard at gmail.com  Fri Apr  1 04:34:31 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 01 Apr 2005 02:34:31 -0700
Subject: Pre-PEP: Dictionary accumulator methods
In-Reply-To: <3b3v1kF6hjvrdU1@individual.net>
References: <JbL_d.8237$qN3.2116@trndny01>
	<1111294347.682560.242840@f14g2000cwb.googlegroups.com>
	<d1koii$2vp$1@panix2.panix.com>
	<eppstein-CCCA47.15142220032005@news.service.uci.edu>
	<1111421226.408373.164680@z14g2000cwz.googlegroups.com>
	<HoydnfL0LNqquNrfRVn-uw@comcast.com>
	<3b3v1kF6hjvrdU1@individual.net>
Message-ID: <AZGdnQExtp8RiNDfRVn-iw@comcast.com>

Greg Ewing wrote:
> Steven Bethard wrote:
> 
>> py> def defaultdict(*args, **kwargs):
>> ...     defaultfactory, args = args[0], args[1:]
> 
> 
> which can be written more succinctly as
> 
>   def defaultdict(defaultfactory, *args, **kwargs):
>     ...

Not if you want to allow the defaultfactory to be called with a keyword 
argument 'defaultfactory'.  Compare my code:

py> def defaultdict(*args, **kwargs):
...     defaultfactory, args = args[0], args[1:]
...     print defaultfactory, args, kwargs
...
py> defaultdict(dict, defaultfactory=True)
<type 'dict'> () {'defaultfactory': True}

with the code you suggested:

py> def defaultdict(defaultfactory, *args, **kwargs):
...     print defaultfactory, args, kwargs
...
py> defaultdict(dict, defaultfactory=True)
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
TypeError: defaultdict() got multiple values for keyword argument 
'defaultfactory'

Uncommon, sure, but I'd rather not rule it out if there's no need to.

STeVe


From neuhauser+python-list#python.org at sigpipe.cz  Mon Apr  4 16:57:29 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Mon, 4 Apr 2005 22:57:29 +0200
Subject: sys.stdout / sys.stderr, subprocess, redirection
Message-ID: <20050404205729.GA6115@isis.sigpipe.cz>

Hello,

I have a piece of code that gets run in a script that has its stdout
closed:

    import sys
    sys.stdout = sys.stderr

    c = subprocess.Popen (...,
                          stdin  = subprocess.PIPE,
                          stdout = subprocess.PIPE,
                          stderr = subprocess.STDOUT)

and this is what I get:

Sending        SVNR/permissions
Transmitting file data .svn: Commit failed (details follow):
svn: 'pre-commit' hook failed with error output:
Traceback (most recent call last):
  (...)
  File ".../__init__.py", line 40, in run
    stderr = subprocess.STDOUT)
  File "/usr/local/lib/python2.4/subprocess.py", line 554, in __init__
    errread, errwrite)
  File "/usr/local/lib/python2.4/subprocess.py", line 986, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

This is the child_traceback:

  File "/usr/local/lib/python2.4/subprocess.py", line 955, in _execute_child
  File "/usr/local/lib/python2.4/os.py", line 341, in execvp
  File "/usr/local/lib/python2.4/os.py", line 379, in _execvpe
    func(fullname, *argrest)
OSError: [Errno 2] No such file or directory

Is this a problem in subprocess (I'm using the FreeBSD port of Python-2.4
and subprocess that comes with that release) or is this expected? If my
expectations are broken (likely), what should the standard descriptor
massaging look like?

Subversion code that runs the script can be seen at
http://svn.collab.net/viewcvs/svn/trunk/subversion/libsvn_repos/hooks.c
(run_hook_cmd()).

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From shama.bell at gmail.com  Fri Apr  1 12:57:22 2005
From: shama.bell at gmail.com (shama.bell at gmail.com)
Date: 1 Apr 2005 09:57:22 -0800
Subject: numeric module
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
	<1112377926.560904.99110@f14g2000cwb.googlegroups.com>
Message-ID: <1112378242.022132.69780@g14g2000cwa.googlegroups.com>

The table initializes to a 2 dimensional with zeros.
-SB



From steve at holdenweb.com  Sun Apr 10 21:00:32 2005
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 10 Apr 2005 21:00:32 -0400
Subject: templating system
In-Reply-To: <130df19305041008552621549c@mail.gmail.com>
References: <130df19305041008552621549c@mail.gmail.com>
Message-ID: <d3ci1i$dsq$1@sea.gmane.org>

Ksenia Marasanova wrote:
> Hi,
> 
> I am looking for fast, simple templating system that will allow me to
> do the following:
> - embed Python code (or some templating code) in the template
> - generate text output (not only XML/HTML)
> 
> I don't need a framework (already have it), but just simple
> templating. The syntax I had in mind is something like that:
> 
> # in Python module
> def some_view():
>     # some code goes here...
>     records = get_some_data()
>     req = get_request_class()
>     return template('some_template.tmpl', **locals()).render()
> 
> # in some_template.tmpl:
> 
> <ul>
> <%for record in records%>
>     <li><a href="<%=record.id%>"><%=record.title%></a></li>
> <%end for%>
> </ul>
> 
> 
>>From what I saw Cheetah seems to be the only one that can do it. I was
> hoping there might be alternatives that I've missed :)
> Thanks!
> 
http://www.reportlab.org/preppy.html

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From radam2 at tampabay.rr.com  Mon Apr  4 17:49:18 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Mon, 04 Apr 2005 21:49:18 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
Message-ID: <43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>


Ok, that post may have a few(dozen?) problems in it.  I got glitched
by idles not clearing variables between runs, so it worked for me
because it was getting values from a previous run.

This should work better,  fixed a few things, too.

The decorators can now take more than one argument.
The function and arguments lists initialize correctly now.

It doesn't work with functions with more than one variable.  It seems
tuples don't unpack when given to a function as an argument.  Any way
to force it?


class Decorator(object):
    """
    Decorator - A base class to make decorators with.

    self.function - name of function decorated.
    self.arglist - arguments of decorator
    self.preprocess - over ride to preprocess function arguments.
    self.postprocess - over ride to postprocess function 
						return value.
    
    Example use:
        class mydecorator(Decorate):
        def self.preprocess(self, args):
            # process args
            return args
        def self.postprocess(self, results):
            # process results
            return results

        deco = mydecorator()

        @deco
        def function(args):
            # function body
            return args
    """
    def __init__(self):
        self.function = None
        self.arglist = []
    def __call__(self, *arg):
        if len(arg) == 1:
            arg = arg[0]
        self.arglist.append(arg)
        def _wrapper( *args):
            if len(args) == 1:
                args = args[0]
            pre_args = self.preprocess(args)
            result = self.function(pre_args)
            return self.postprocess(result)
        if 'function' in str(arg):
            self.arglist = self.arglist[:-1]
            self.function = arg
            return _wrapper
        return self            
    def preprocess(self, args):
        return args
    def postprocess(self, result):
        return result


#---3---
class mydecorator(Decorator):
    def preprocess(self, args):
        args = 2*args
        return args
    def postprocess(self, args):
        args = args.upper()
        args = args + str(self.arglist[0])
        return args
deco = mydecorator()

@deco('xyz')
def foo(text):        
    return text 
print foo('abc')


#---2---
class decorator2(Decorator):
    def preprocess(self, args):
        return args+sum(self.arglist[0])
    def postprocess(self, args):
        return args
deco2 = decorator2()

@deco2(1,2)
def foo(a):
    return a  
print foo(1)

# This one doesn't work yet.
#---3---
class decorator3(Decorator):
    pass
deco3 = decorator3()

@deco3
def foo(a,b):
    return a,b
print foo(1,3)




From steven.bethard at gmail.com  Mon Apr 18 13:50:46 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 18 Apr 2005 11:50:46 -0600
Subject: How to get a Function object from a Frame object
In-Reply-To: <mailman.2054.1113843979.1799.python-list@python.org>
References: <mailman.2054.1113843979.1799.python-list@python.org>
Message-ID: <nYWdnTAtyqHqbv7fRVn-hg@comcast.com>

Gigi wrote:
> I need access to a function object that corresponds to a frame object in 
> a certain case from inside the function.
> 
> I can get the frame object using:
> 
> f = sys._getframe(0)
> 
> But the resulting frame object doesn't contain the information I need. 
> There is a lot of information in the code object (f.f_code), but not the 
>     actual function or method object.
> 
> The inspect module doesn't help either it just provides nicer interface 
> to the Frame object.
> 
> Any ideas out there?

Can you look up the code's co_name in the previous frame's locals?

py> def getself():
...    frame = sys._getframe(1)
...    return frame.f_back.f_locals[frame.f_code.co_name]
...
py> def g():
...     def h():
...         return getself()
...     return dict(g=getself(), h=h())
...
py> g()
{'h': <function h at 0x01194BB0>, 'g': <function g at 0x01194BF0>}

You probably also need to check the previous frame's globals...  And 
there are probably some cases where this code still wouldn't work...

STeVe


From mefjr75 at hotmail.com  Fri Apr  1 21:45:29 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 1 Apr 2005 18:45:29 -0800
Subject: Search-and-delete text processing problem...
In-Reply-To: <1112408289.832519.287880@z14g2000cwz.googlegroups.com>
References: <0eadnS8Lk5Aaa9DfRVn-gw@speakeasy.net>
	<1112408289.832519.287880@z14g2000cwz.googlegroups.com>
Message-ID: <1112409929.003403.320030@f14g2000cwb.googlegroups.com>

My apologies you did indeed use writelines correctly ;)
dohhh!
I had a gut reaction to this.
Py>f = ['hij\n','efg\n','abc\n']
Py> for i in f:
...     if i.startswith('a'):
...         i == ''
Py> f
['hij\n', 'efg\n', 'abc\n']
Notice that it does not modify the list in any way.
You are trying to loop thru the list and modify the items in place, it
just won't work.
When you rebind the item name to a new value ' ' it does not rebind the
element in the list just the current item.
It is also bug prone to modify a list you are looping over.
M.E.Farmer



From philippe at philippecmartin.com  Wed Apr 20 13:34:30 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Wed, 20 Apr 2005 17:34:30 GMT
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
	<42666097.3040405@i.com.ua>	<dqCdneECDr445vvfRVn-tA@powergate.ca>
	<Mrv9e.882$l45.490@newssvr12.news.prodigy.com>
	<mailman.2190.1114017352.1799.python-list@python.org>
Message-ID: <Gow9e.749$yd7.732@newssvr11.news.prodigy.com>

I guess the point could be "where do you draw the line": you can break and
continue in Python, but you cannot goto. Some people, so it seems ;-) ,
would like to see gotos in Python whereas other think breaks and continues
should be excluded ...;

Regards,

Philippe



Steve Holden wrote:

> Philippe C. Martin wrote:
>> I do not want to pollute the debate but:
>> 
>> -) I remember a software QA managanager responsible for "C" coding rules
>> also not allowing us to use 'break', 'continue', or 'return' (in the
>> middle of a function).
>> 
> And I once worked (back in the 1970's) in a software shop where "because
> procedure calls are slow in PL/1" we had to write them so each procedure
> ended with a GOTO to a specific label variable. You would call these
> monstrosities in the following way:
> 
>      MyProcReturn = DoneIt;
>      GOTO MyProc;
> DoneIt:
>      ...
> 
> Horrendous. I lasted about five months and then couldn't take the
> ignorance and idiocy any longer. They refused to believe that a
> recursive function could ever be useful in the real world (but then, if
> you only have a hammer ...)
> 
> regards
>   Steve



From andrea_gavana at tin.it  Fri Apr  8 16:25:51 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Fri, 8 Apr 2005 22:25:51 +0200
Subject: Registering File Extension?!?
Message-ID: <4200063400024066@ims9c.cp.tin.it>

Hello NG,

    probably this question has been asked before, but I am unable to find
an answer... I have a big application (written in Python + a GUI in wxPython)
which allows the user to save its work in a file with an extension .glb.
Does anyone know if is there a way (on Windows, but also on other platforms
if possible, thought I know almost nothing about Unix/Linux/Mac things)
to automatically register the extension .glb so that when the user double-clicks
the project file my application is launched with the project file name as
a first argument?

Thank you for every suggestion/pointer.

Andrea.



From greg at cosc.canterbury.ac.nz  Sun Apr  3 23:52:19 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Mon, 04 Apr 2005 15:52:19 +1200
Subject: what's the use of __repr__?when shall I use it?
In-Reply-To: <Pine.GSO.4.44.0503312311520.26126-100000@epic19.Stanford.EDU>
References: <mailman.1169.1112338093.1799.python-list@python.org>
	<Pine.GSO.4.44.0503312311520.26126-100000@epic19.Stanford.EDU>
Message-ID: <3bbs00F6it0t5U1@individual.net>

Vikram wrote:
> __repr__ should return something that when eval'ed yields an identical
> object (if possible).

That's strictly possible in so few cases that it's not
really a very helpful guideline, in my opinion.

I find the following view more helpful:

* str() is for producing the normal output of a program,
   to be seen by the user.

* repr() is for debugging output, and should indicate
   reasonably unambiguously the *type* of the object.
   When debugging, it's often at least as important to
   know what type of object you have as what value it
   has.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From robin at reportlab.com  Tue Apr 12 05:22:21 2005
From: robin at reportlab.com (Robin Becker)
Date: Tue, 12 Apr 2005 10:22:21 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <425b8cf7$0$38043$bed64819@news.gradwell.net>
References: <ECBA357DDED63B4995F5C1F5CBE5B1E802911DE5@its-xchg4.massey.ac.nz>	<mailman.1724.1113261387.1799.python-list@python.org>	<1113264839.497914.210170@z14g2000cwz.googlegroups.com>
	<425b8cf7$0$38043$bed64819@news.gradwell.net>
Message-ID: <425B934D.2010108@chamonix.reportlab.co.uk>

Michael Kearns wrote:
.....
> I would guess from the responses so far that Python 2.4 just isn't used 
> within commercially shipping products, or is quietly used by an product 
> so as not to incur any legal wrath that might be found. Perhaps it isn't 
> quite ready for what I want to achieve. I don't know.
> 
> I just know that I am spending the rest of the day migrating back to 2.3 
> where I will stay.
....
The switch to 2.4+msvc7.1 has been a success for MS as many developers now 
require both 6 & 7 to provide full coverage. Of course this wasn't a pythonic 
choice, but MS certainly encouraged the move by delivering free SDKs to key 
people. It's not really MS's fault; they want to advance and get revenue like 
everyone else; python has to follow or end up on a dying platform.

People have mentioned the older v6 build scripts/tools still work. Last time I 
tried they seemed a bit out of date.

-wondering where my paper tape editor is-ly yrs-
Robin Becker



From jrastrick at student.usyd.edu.au  Sun Apr  3 09:22:01 2005
From: jrastrick at student.usyd.edu.au (Jordan Rastrick)
Date: 3 Apr 2005 06:22:01 -0700
Subject: the bugs that try men's souls
In-Reply-To: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>
References: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>
Message-ID: <1112534521.797702.53630@l41g2000cwc.googlegroups.com>

I think I found your bug, although it took a bit of time, a fair bit of
thought, and a fair bit of extra test-framework code - your program is
very concise, reasonably complex, and very unreadable. Its perfect for
testing maths theorems of your own interest, but you probably should
have polished it up a little, and explained a little more precisely
what the actual lines of code were supposed to be doing (as distinct
what mathematical ideas they were testing) before posting it to a forum
with a request for others to debug it.

I sympathise though - I'm a Maths undergraduate student myself, and I
often write dodgy, buggy code like this in high level languages like
Python, Haskell etc to test ideas :)

Anyway, from what I can tell the problem is with the line

print '%s %5s %3s' %(str([a,b]),int([p[a],p[b]] in
s),int([p[t[a]],p[t[b]]] in s))

I've assumed/deduced you mean for the expression:
([p[a],p[b]] in s)
to test whether (a,b) is an inversion of pt, i.e. is [pt(a),pt(b)] in
the collection s of stepup pairs (thats according to my understanding
of the terms you've used). But s is not complete list of stepup pairs
if you apply the 'xor filter' in the line you've labeled #MYSTERIOUSLY
BROKEN, its the list of stepup pairs sharing a co-ordinate with [a,b].
So you correctly identified the source of the bug as being at that
line.

I think (guess) what youre really trying to do is filter at the
printing stage, so you're just printing at those cases where {a,b} and
{x,y} share one and only one element, and ignoring the other trivial
cases - i'm inferring this from the fact you don't think the 'answers'
should change, just, presumably, the amount of output. This works:

def feedback(p,t):
    ## GIVEN A PERMUTATION f AND A STEPUP PAIR s WITH COORDINATES IN
THE RANGE OF f,
    ## SHOW THE INTEGER CASE OF THE PROPOSITION << f(s) IS A STEPUP
PAIR >>
    k = 18
    moved = [i for i in range(len(t)) if t[i]<>i]
    g,h = min(moved), max(moved)
    n = len(p) - 1
    s = stepups(n)
    print '-'*k
    print 'p: ' + str(range(n+1)) + '\n   ' + str(p)
    print '-'*k
    print 't = ' + str((g,h))
    print '-'*k
    print '%s %7s %3s' %('pair','p','pt') + '\n' + '-'*k
    for [a,b] in s:
        if xor(g in [a,b], h in [a,b]):
            print ([p[a],p[b]]), ([p[t[a]],p[t[b]]])
            print '%s %5s %3s' %(str([a,b]),int([p[a],p[b]] in
s),int([p[t[a]],p[t[b]]] in s))
            print '-'*k

You can replace g and h if you want, they were pretty arbitrary
letters, but whatever you do dont use 'a' and 'b' twice like your
original code did, its awful programming practice. Even in Maths you
wouldnt let one pronumeral stand for two different quantities in the
same proof, its a recipe for disaster.

If this was wrong, and you really did want to test for inversion only
against the reduced set of pairs, a more complete explanation of what
kind of 'wrong answers' you are getting and what kind of 'right
answers' you were expecting might help. As far as I can tell though,
its quite natural the answers will be different when testing against a
subset of the stepup pairs when compared to testing against the whole
set.

Cheers,
Jordan

P.S. Oh, and if you come up with a proof of the proposition, let me
know, I'd like to see it :)

Sean McIlroy wrote:
> This needs some background so bear with me.
>
> The problem: Suppose p is a permutation on {0...n} and t is the
> transposition that switches x and y [x,y in {0...n}]. A "stepup pair"
> (just a term I invented) for p is a pair (a,b) of integers in {0...n}
> with a<b. A stepup pair (a,b) for p is an "inversion" (standard term)
> of p iff (p(a),p(b)) is NOT a stepup pair. Now, if {a,b}={x,y}, then
> clearly (a,b) is an inversion of p iff it is NOT an inversion of pt
> (functional composition). Also, if {a,b} and {x,y} are disjoint, then
> (a,b) is an inversion of p iff it is an inversion of pt. The
remaining
> cases are the ones where {a,b} and {x,y} have a single element in
> common, and of these, there are exactly as many inversions of p as
> there are of pt, though in general it is not the same set of stepup
> pairs for each function.
>
> The code below represents my attempt to apply python toward getting
> insight into why the number of inversions, with exactly one
coordinate
> in {x,y}, is the same for p and pt. The problem with the code is that
> if, at the relevant line ("MYSTERIOUSLY BROKEN"), I use the
> commented-out expression instead of the expression that's actually
> there, then in some cases the script gives a DIFFERENT ANSWER to the
> question whether a given pair is or is not an inversion of p
> respectively pt.
>
> I'd sure like to know what's going wrong with this. Here's the code:
>
>
> ## STEPUP PAIR: AN ORDERED PAIR (x,y) OF INTEGERS WITH x<y
>
> stepups = lambda n: n and stepups(n-1) + [[x,n] for x in range(n)] or
> []
> xor = lambda x,y: (x and not y) or (y and not x)
>
> def feedback(p,t):
>     ## GIVEN A PERMUTATION f AND A STEPUP PAIR s WITH COORDINATES IN
> THE RANGE OF f,
>     ## SHOW THE INTEGER CASE OF THE PROPOSITION << f(s) IS A STEPUP
> PAIR >>
>     k = 18
>     moved = [i for i in range(len(t)) if t[i]<>i]
>     a, b = min(moved), max(moved)
>     n = len(p) - 1
>     s = stepups(n) ## MYSTERIOUSLY BROKEN: [x for x in stepups(n) if
> xor(a in x,b in x)]
>     print '-'*k
>     print 'p: ' + str(range(n+1)) + '\n   ' + str(p)
>     print '-'*k
>     print 't = ' + str((a,b))
>     print '-'*k
>     print '%s %7s %3s' %('pair','p','pt') + '\n' + '-'*k
>     for [a,b] in s:
>         print '%s %5s %3s' %(str([a,b]),int([p[a],p[b]] in
> s),int([p[t[a]],p[t[b]]] in s))
>     print '-'*k



From simoninusa2001 at yahoo.co.uk  Fri Apr 15 12:28:12 2005
From: simoninusa2001 at yahoo.co.uk (Simon John)
Date: 15 Apr 2005 09:28:12 -0700
Subject: py2exe - create one EXE
In-Reply-To: <1113580317.027071.183640@z14g2000cwz.googlegroups.com>
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
	<mailman.1977.1113579964.1799.python-list@python.org>
	<1113580317.027071.183640@z14g2000cwz.googlegroups.com>
Message-ID: <1113582492.351604.257570@z14g2000cwz.googlegroups.com>

yeah, the question does come up once a month at least, but you could
try mcmillan installer with it's --onefile option.

i have mirrors at http://www.the-jedi.co.uk/downloads/installer



From rkern at ucsd.edu  Sun Apr 17 19:33:04 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 17 Apr 2005 16:33:04 -0700
Subject: python.exe on Mac OS X!?
In-Reply-To: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>
References: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>
Message-ID: <d3urg5$2ka$1@sea.gmane.org>

Rodney Maxwell wrote:
> I did a source code build of Python 2.4.1 on OS X (10.3.8) and the
> executable produced was 'python.exe'. Can someone tell me whether this
> is a bug, feature, or UserError?

I'm not sure. Why don't you grab the binary?

http://www.python.org/ftp/python/2.4.1/MacPython-OSX-2.4.1-1.dmg

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From li.qj at 126.com  Thu Apr 14 03:12:18 2005
From: li.qj at 126.com (jerky)
Date: Thu, 14 Apr 2005 15:12:18 +0800
Subject: how to solve [ 1144533 ] htmllib quote parse error within a <script>
Message-ID: <d3l5km$2hbv$1@mail.cn99.com>

hi,everyone,
get the details in 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1144533&group_id=5470

many thanks!




From norbert.thek at gmail.com  Thu Apr 14 05:04:20 2005
From: norbert.thek at gmail.com (Norbert Thek)
Date: 14 Apr 2005 02:04:20 -0700
Subject: Formated String in optparse
References: <3569dc63.0503302359.d7e163a@posting.google.com>
	<d2gflu$c1q$04$1@news.t-online.com>
	<1112264573.694445.31520@z14g2000cwz.googlegroups.com>
	<d2gkf2$ej9$02$1@news.t-online.com>
Message-ID: <3569dc63.0504140104.1c32d0e3@posting.google.com>

Thank You for your help, its working!

Now I have an additional question.
The problem is the encoding of the Text
I'm using German, Can you tell me how to encode
the textstring that the Windows commandline shows the special letters 
right?  
For exampel i get 'f?r' but i want 'f?r'  (maybe reader with only an english
enabled browser wouldn't see a difference..)

I tried to work with the encode method of string but It didn't work for me
some hint what to do?


Norbert


From hancock at anansispaceworks.com  Wed Apr 13 09:53:31 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 13 Apr 2005 08:53:31 -0500
Subject: database in python ?
In-Reply-To: <op.so424whjqfv3if@localhost>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113339252.851450.184620@z14g2000cwz.googlegroups.com>
	<op.so424whjqfv3if@localhost>
Message-ID: <200504130853.31989.hancock@anansispaceworks.com>

On Tuesday 12 April 2005 04:54 pm, Pierre-Fr?d?ric Caillaud wrote:
> 	Speaking of the manual, the mysql manual is quite... well... i don't  
> quite find the word, but it has many sentences which sound like PR stuff.  
> Like, we don't do this like you or anyone would expect, but there is a  
> reason ! Embrace our school of thought, stop worrying about integrity  !  
> Peace, my friend, etc. And the non-working examples posted in the user  
> comments are nice to look at, too. The organization of the manual is a  
> mess, too, it's often quite difficult to find what I seek. The postgres  
> manual is just wonderful.

Whereas the Postgresql manual starts with an explanation of how the
universe was formed and goes on to a diatribe against anyone who
ever works on a competing RDBMS because it "wastes effort".
Arrogance like that is stunning, and it destroys my confidence in the
project itself if the people responsible for it think like that.

I put it down at that point, myself. ;-)

It would be nice to think that that has been since removed, but I
haven't bothered to check. 

Actually, I'm exaggerating, but I certainly found the MySQL online
manual vastly easier to read than the Postgresql documentation.  That
may not be a totally fair comparison, since I'm comparing the MySQL
manual *now* to the Postgresql manual *then*.   But then you all
keep describing MySQL's 1990s feature set, including the licensing.

> 	I know I'm feeding the flamewar, but I can't resist, 

Yeah, well, as long as we don't take ourselves too seriously. ;-)

> once I came up on a  
> post on the mysql website from a guy basically saying "wow, the fulltext  
> is so powerful, I can search this document set in only half a second !"  
> and then the same day, on the postgres mailinglist, there was a message  
>  from a guy who was really upset because his full text search on something  
> like 1000 times bigger would take more than one tenth a second, and that  
> wan't really acceptable for him, and then several competent people  
> responded and helped him make it work.

That's interesting.  Most sources I've read seemed to suggest that postgresql
is slower than MySQL, at least for modest size tables.  There must, I suppose,
be some turnover point on the size of the database?  Or are you arguing that
postgresql is now faster than MySQL in the general case?  Can you suggest
sources for investigating that formally?

It's just possible that I should reconsider Postgresql compatibility. I
would assume that using the Python DB API would make portability
between the two easier in any case, wouldn't it?

Cheers,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From bearophileHUGS at lycos.com  Mon Apr 25 15:39:51 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Apr 2005 12:39:51 -0700
Subject: Bounding box on clusters in a 2D list
In-Reply-To: <1114456596.990810.233630@z14g2000cwz.googlegroups.com>
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
	<1114378980.909132.216600@f14g2000cwb.googlegroups.com>
	<1114456596.990810.233630@z14g2000cwz.googlegroups.com>
Message-ID: <1114457990.995627.224160@z14g2000cwz.googlegroups.com>

In my first post you can find two URLs with better flood filling
algorithms. You can also modify the easy recursive function, using a
list-based stack intead of recursive calls.

Bye,
Bearophile



From vze4rx4y at verizon.net  Fri Apr  1 19:27:39 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 02 Apr 2005 00:27:39 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca>
Message-ID: <%Fl3e.1804$7b.990@trndny01>

[Peter Hansen]
> unittest can really be rather light.  Most of our
> test cases are variations on the following, with
> primarily application-specific code added rather than
> boilerplate or other unittest-related stuff:
>
> import unittest
>
> class TestCase(unittest.TestCase):
>      def test01(self):
>          '''some test....'''
>          self.assertEquals(a, b)
>
>      def test02(self):
>          '''another test'''
>          self.assertRaises(Error, func, args)
 . . .
> I'm a little puzzled why folks so often consider this
> particularly "heavy".

unittest never felt heavy to me until I used py.test.  Only then do you realize
how much boilerplate is needed with unittest.  Also, the whole py.test approach
has a much simpler object model.

BTW, the above code simplifies to:

from py.test import raises
assert a == b
raises(Error, func, args)


Raymond Hettinger




From codecraig at gmail.com  Thu Apr 14 15:10:31 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 12:10:31 -0700
Subject: py2exe + XML-RPC problem
In-Reply-To: <1113496062.959951.41150@l41g2000cwc.googlegroups.com>
References: <1113496062.959951.41150@l41g2000cwc.googlegroups.com>
Message-ID: <1113505831.015726.124920@o13g2000cwo.googlegroups.com>

update to this.  I generated an exe for the client and server.  They
both run fine, except, when i send a command from the client to server,
the cleint spits out this..

xmlrpclib.ProtocolError: <ProtocolError for 10.50.20.5:80/RPC2: -1 >

When I run the .py's by themselves I do not get this.  This only occurs
with the generated .exe's.

thanks



From kosh at aesaeion.com  Thu Apr 14 00:35:21 2005
From: kosh at aesaeion.com (kosh)
Date: Wed, 13 Apr 2005 22:35:21 -0600
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <1o31j2-7l6.ln1@home.rogerbinns.com>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<mailman.1769.1113320562.1799.python-list@python.org>
	<1o31j2-7l6.ln1@home.rogerbinns.com>
Message-ID: <200504132235.21296.kosh@aesaeion.com>

On Wednesday 13 April 2005 9:11 pm, Roger Binns wrote:
> "Terry Reedy" <tjreedy at udel.edu> wrote in message
> news:mailman.1769.1113320562.1799.python-list at python.org...
>
> > I guess I don't understand some people's determination to not have users
> > install fully useable Python on their Windows machines.
>
> Ok, here is how you install BitPim which contains a frozen Python:
>
>   - Download and run the setup.exe from www.bitpim.org  (The
>     instructions are the equivalent on Linux and Mac)
>

Here is the situation I see. I use debian linux systems. Installing all the 
dependencies is trivial and if your program has a debian package it would be 
a single command. The reason I don't like these programs that built the 
runtime, static link in a bunch of stuff etc is that it is a pain to upgrade 
later. If there is a security fix to python 2.4 I know there is ONE copy 
installed on the system and that updating it will fix it. If there is a 
problem with libpng, libjpeg, kdelibs, zope, apache etc the same is still 
true, there is only ONE copy of those items on the system and with a single 
command all of them can be updated and fixed. 

Under windows I can see why you would want stand alone binaries since it has 
no method for dealing with dependencies the way that the bsds and linuxes 
can. However for a unix product I always want items to be in their seperate 
parts since it makes my life as a programmer and admin a heck of a lot 
easier. Actually I tend to avoid any software that is not in the debian main 
archives since then it is more of a pain to deal with later.

Keeping track of security updates, feature updates etc for a bunch of 
computers with a lot of software from different locations is a royal pain in 
the neck. With windows it is worse since you don't even have a centralized 
update system.


From prouleau at impathnetworks.com  Sat Apr 23 17:30:52 2005
From: prouleau at impathnetworks.com (Pierre Rouleau)
Date: Sat, 23 Apr 2005 17:30:52 -0400
Subject: Why is Python not supporting full derivation of built-in file class?
Message-ID: <b8zae.11591$9G.927404@news20.bellglobal.com>

Greetings,

I'm wondering why the >> operator does not use the write() method of a 
class derived from the built-in file class as in DerivedFile below.

In the following example:

- StringFile is just a file-like string accumulation class that can be 
used in place of a real file to accumulate strings that would otherwise 
be printed.  Works fine, can accumulate strings with the >> operator, 
but is not a true file.

- DelegatedFile is a new-style class, a true file class, which provides 
all the features of a real file through delegation.  It also works fine 
and can accumulate string with the >> operator.

- DerivedFile is a new-style class that is derived from file.  It 
behaves like a true file, but the >> operator does not call its write() 
method.  Why is that?

Is this related to the fact that on object from that class is seen as a 
file (as shown at the end of the code session below)?

Is this intended or is it a flaw in the language that is waiting to be 
fixed?


 >>> import sys
 >>> sys.ps2=' ... '; sys.ps1=' >>> '
  >>> def hello(stream=None):
  ...     if stream is None:
  ...         stream = sys.stdout
  ...     print >> stream, "Bonjour!"
  ...

  >>> # Using a duck-typing to define a class
  ... # that behaves like a file for writing only.
  ... class StringFile:
  ...     "A file-like object to accumulate strings"
  ...     # print >> aStringFile works
  ...     def __init__(self):
  ...         self.strings = []
  ...     def write(self, text):
  ...         self.strings.append(text)
  ...     def writelines(self, lines):
  ...         self.strings.extend(lines)
  ...

  >>> # Using delegation to file to create a class that
  ... # extends the built-in file object.
  ... class DelegatedFile(object):
  ...     "A file-like object to accumulate strings"
  ...     # print >> aStringFile works
  ...     def __init__(self, *args):
  ...         self.strings = []
  ...         self._file = file(*args)
  ...     def __getattr__(self, name) :
  ...         return getattr(self._file, name)
  ...     def write(self, text):
  ...         self.strings.append(text)
  ...         self._file.write(text)
  ...     def writelines(self, lines):
  ...         self.strings.extend(lines)
  ...         self._file.writelines(lines)
  ...

  >>> # Using derivation from file to create a class
  ... # that extends file. But has a flaw in the use of the >> operator!
  ... class DerivedFile(file):
  ...     "A file object that accumulated written strings"
  ...     # print >> a DerivedFile doe NOT work!
  ...     def __init__(self, *args):
  ...         self.strings = []
  ...         file.__init__(self, *args)
  ...     def write(self, text):
  ...         self.strings.append(text)
  ...         file.write(self, text)
  ...         # super(DerivedFile, self).write(text)
  ...     def writelines(self, lines):
  ...         self.strings.extend(lines)
  ...         file.writelines(self, lines)
  ...         # super(DerivedFile, self).writelines(lines)
  ...

  >>> hello()
Bonjour!
  >>>

  >>> sf = StringFile()
  >>> hello(sf)
  >>> sf.strings
['Bonjour!', '\n']
  >>>

  >>> dg = DelegatedFile("temp.txt","w")
  >>> hello(dg)
  >>> dg.close()
  >>> dg.strings
['Bonjour!', '\n']
  >>> for line in file("temp.txt"): print line
  ...

Bonjour!

  >>> df = DerivedFile("temp2.txt","w")
  >>> hello(df)
  >>> df.close()
  >>> df.strings
[]
  >>> for line in file("temp2.txt"): print line
  ...

Bonjour!

  >>>
  >>> sf
<__main__.StringFile instance at 0x008D86C0>
  >>> dg
<__main__.DelegatedFile object at 0x008D50B0>
  >>> df
<closed file 'temp2.txt', mode 'w' at 0x0087FA28>
  >>>

--

Pierre Rouleau


From rbt at athop1.ath.vt.edu  Thu Apr 21 09:11:32 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Thu, 21 Apr 2005 09:11:32 -0400
Subject: recording data between [ and ]
Message-ID: <d488q5$apl$1@solaris.cc.vt.edu>

Output from 'netstat -b' on a win2003 server will show what binary is 
responsible for the connection. For example, it may list something like 
this along with other connection specific data:

[lsass.exe]
[System]
[firefox.exe]
[iexplorer.exe]

How might I process the output so that anything within brackets is 
recorded to a log file of my own making? I know how to parse and record 
things to a file, I don't know how to look make '[' and ']' appear as 
special characters so that I can record what's between them.

Basically, I want a script that will read output and stop each time it 
encounters a '[' and record until it gets to ']' where upon it would 
stop recording and then proceed on repeating the above operation as it 
goes thru the remaining data.

Thanks,
rbt


From fred.dixon at gmail.com  Wed Apr 13 16:57:57 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 13 Apr 2005 13:57:57 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <1113422470.180010.172970@z14g2000cwz.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
Message-ID: <1113425877.432067.171760@f14g2000cwb.googlegroups.com>

it seems that i can import __main__ where i set the global and then
access the var from my local func.

is ther any gotcha's involveld in this ?



From discussion.support at autodesk.com  Tue Apr 26 14:04:45 2005
From: discussion.support at autodesk.com (Isaac Rodriguez)
Date: Tue, 26 Apr 2005 14:04:45 -0400
Subject: Coding Standards (and Best Practices)
Message-ID: <1114538687.21150@hqnntp01.autodesk.com>

Hi,

I am fairily new to Python, but I am really liking what I am seeing. My team 
is going to re-design some automation projects, and we were going to use 
Python as our programming language. One of the things we would like to do, 
since we are all new to the language, is to define a set of guidelines and 
best practices as our coding standards.

Does anyone know where I can get some information about what the community 
is doing? Are there any well defined guidelines established?

Thanks,

-- 
Isaac Rodriguez
SWE Autodesk.
========================================
There are 10 types of people.
Those who undertand binary, and those who don't 




From ajikoe at gmail.com  Mon Apr  4 15:27:53 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 4 Apr 2005 12:27:53 -0700
Subject: setup distributed computing for two computer only
In-Reply-To: <42518a67$0$136$e4fe514c@news.xs4all.nl>
References: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>
	<42518a67$0$136$e4fe514c@news.xs4all.nl>
Message-ID: <1112642873.737256.186470@z14g2000cwz.googlegroups.com>

Hello,
There are two computer.
For example one computer ask other computer to run  function, procedure
or object then receive the result.

I want to know about what should I do to setup such system and what
software I need to implement it.

Sincerely Yours,
Pujo



From steven.bethard at gmail.com  Thu Apr 21 11:07:43 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 21 Apr 2005 09:07:43 -0600
Subject: How can I verify that a passed argument is an interible
	collection?
In-Reply-To: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <uKWdnfrQE_IhXPrfRVn-hg@comcast.com>

Charles Krug wrote:
> List:
> 
> I'm working on some methods that operate on (mathematical) vectors as
> in:
> 
> def Convolution(x, y)
> """Returns a list containing the convolution of vectors x and y"""
> 
> Is there any way to determine at runtime that x and y are iterible
> collections?
> 
> Do I *coughs* simply *coughs* trap the exception created by:
> 
>     for v in x:
> 
> when v is a scaler quantity?

Sure, or if you want to do it earlier, you could try something like:

def convolution(x, y):
     xiter = iter(x)
     yiter = iter(y)

And then use xiter and yiter in your for loops.  This will make sure 
that the TypeErrors get raised as soon as the function is called.

STeVe


From kingofearth.com at gmail.com  Thu Apr 14 14:38:23 2005
From: kingofearth.com at gmail.com (kingofearth.com at gmail.com)
Date: 14 Apr 2005 11:38:23 -0700
Subject: Socket Error
Message-ID: <1113503903.874232.322370@o13g2000cwo.googlegroups.com>

When I try to open a socket with python i get the following error:

Traceback (most recent call last):
  File "./mailer", line 3, in ?
    sock = socket.socket(socket.PF_INET, socket.SOCK_STREAM)
NameError: name 'socket' is not defined

the code is:

#!/usr/bin/python

sock = socket.socket(socket.PF_INET, socket.SOCK_STREAM)
sock.connect(("mail.oasd.k12.wi.us", 25))
sock.send("HELO")
print sock.recv(8192)
sock.close()



From monografia at xfdgr.com  Tue Apr 26 01:13:46 2005
From: monografia at xfdgr.com (monografia )
Date: Tue, 26 Apr 2005 06:13:46 +0100
Subject: 3046 monografia 3046
Message-ID: <DDAC168FB5C09749AD96D27804CA35D105AD2706@SETUBAL>

           Monografias completas a partir de 250,00 !


  monografia administra??o direito turismo economia letras pedagogia
  monografias teses  tese.

Sua monografia a partir de 250,00
http://monografiadireta.rg3.net






From peter at engcorp.com  Tue Apr 19 17:01:16 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 19 Apr 2005 17:01:16 -0400
Subject: python
In-Reply-To: <mailman.2126.1113938297.1799.python-list@python.org>
References: <27b90ebf.0504191109.b4d8513@posting.google.com>
	<mailman.2126.1113938297.1799.python-list@python.org>
Message-ID: <0O6dnQc2MsPt7_jfRVn-gQ@powergate.ca>

James Stroud wrote:
> python.org

Combined with a bit of Google and just the slightest
touch of whatever the opposite of laziness is, for
a start...

> 
> On Tuesday 19 April 2005 12:09 pm, waqar wrote:
> 
>>I am new to python. I need some information on following specifically:
>>
>>- Background & Evolution of python
>>- current application areas
>>- future trend.
>>
>>Kindly any one provide me such information or tell websites for that
>>purpose.

"waqar", you'll do better here if you take a bit of
time to review the most easily accessible material
first, then post questions to fill in the gaps, clearly
pointing out what you've already found on your own,
both to show that you made at least a token effort,
and to avoid people pointing out obvious stuff to you.

-Peter


From tjreedy at udel.edu  Thu Apr  7 17:49:39 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 7 Apr 2005 17:49:39 -0400
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu><mailman.1222.1112417820.1799.python-list@python.org><d2vhi8$k29$1@panix1.panix.com><mailman.1429.1112794393.1799.python-list@python.org><d33ij3$9jj$1@panix2.panix.com>
	<idna51pof93qshrpr3lq3flm8cdpapkdld@4ax.com>
Message-ID: <d349p5$rjf$1@sea.gmane.org>


"Ron_Adam" <radam2 at tampabay.rr.com> wrote in message 
news:idna51pof93qshrpr3lq3flm8cdpapkdld at 4ax.com...
> Python has one obvious best way to do things.

More exactly, 'should preferably have' rather than 'has'.
>
> Meaning that the most obvious and clearest way, the way that comes to
> mind first, will in most cases, also be the best way.
>
> I seem to remember reading it put in that way some place at some time.

>>> import this # The Zen of Python

tjr





From jstroud at mbi.ucla.edu  Sun Apr 24 23:20:27 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 24 Apr 2005 20:20:27 -0700
Subject: Multiple tuples for one for statement
In-Reply-To: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
Message-ID: <200504242020.27440.jstroud@mbi.ucla.edu>

for a,b,c in zip(tup1, tup2, tup3):
   print a
   print b
   print c
-- 
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/


From beliavsky at aol.com  Wed Apr 13 12:44:20 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 13 Apr 2005 09:44:20 -0700
Subject: preallocate list
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
Message-ID: <1113410660.515852.92420@z14g2000cwz.googlegroups.com>

Jim wrote:
> Hi all
>
> Is this the best way to preallocate a list of integers?
> listName = range(0,length)

For serious numerical work you should use Numeric or Numarray, as
others suggested. When I do allocate lists the initial values 0:n-1 are
rarely what I want, so I use

ivec = n*[None]

so that if I use a list element before intializing it, for example

ivec[0] += 1

I get an error message

  File "xxnone.py", line 2, in ?
    ivec[0] += 1
TypeError: unsupported operand type(s) for +=: 'NoneType' and 'int'

This is in the same spirit as Python's (welcome) termination of a
program when one tries to use an uninitalized scalar variable.



From steve at holdenweb.com  Tue Apr 12 03:58:15 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 03:58:15 -0400
Subject: How to minimize the window
In-Reply-To: <d3fu6s$5ek$1@netnews.hinet.net>
References: <d3fu6s$5ek$1@netnews.hinet.net>
Message-ID: <d3fusd$uco$1@sea.gmane.org>

Austin wrote:
> I wrote a GUI program with wxPython.
> In the window, there are 3 attributes on left top.
> "_" could let the program to minimize to tool bar.
> I want to let the program minimized to the system tray.
> Is there any way to let the window have 4 attributes?
> "."  "_"  "O " "x" 
> 
> 
These features of window behavior are normally handled by the Windows or 
X Window window manager code. Though you can reach behind the interface 
and change them, it might be easier simply to have a "Migrate to System 
Tray" button inside your system's GUI. This could toggle to "Normal 
Iconisation" when the window only appeared int he system tray.

Or, you could do what the Windows Task Manager does, and provide both a 
standard icon *and* a system tray icon.

Noticed you seem to be pretty new to c.l.py, so while I have your 
attention: welcome aboard!

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From henrikpierrou at hotmail.com  Wed Apr 20 03:44:53 2005
From: henrikpierrou at hotmail.com (henrikpierrou at hotmail.com)
Date: 20 Apr 2005 00:44:53 -0700
Subject: Python instances
In-Reply-To: <d450ub$2kp$1@news.web.de>
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
	<d450ub$2kp$1@news.web.de>
Message-ID: <1113983093.813565.23430@l41g2000cwc.googlegroups.com>

Guess i shouldn't think of the __init__(self) function as a constructor
then.
Thanks.

/H



From elbertlev at gmail.com  Sun Apr  3 19:05:14 2005
From: elbertlev at gmail.com (elbertlev at gmail.com)
Date: 3 Apr 2005 16:05:14 -0700
Subject: threading.Event file descriptor
In-Reply-To: <8XZ3e.13367$g_5.314475@wagner.videotron.net>
References: <zxM3e.55834$rl.2020212@weber.videotron.net>
	<1112562641.542176.202030@z14g2000cwz.googlegroups.com>
	<8XZ3e.13367$g_5.314475@wagner.videotron.net>
Message-ID: <1112569514.641782.165380@f14g2000cwb.googlegroups.com>

//And there's no handle at all?

There is one (check thread_nt.h) you have to "propagate" HANDLE to
Pythom level. That's why, you have to change the interpreter. Do not
forget, that thread is a build-in module.

//I wouldn't want to derive from Event since my goal would be to submit
a
patch to make subprocess.Popen.wait take an optional threading.Event to
kill the process.

And that's it? Right now aquire_lock is non-interruptable, as a result
your Popen.wait is also non-interruptable, but if you pass derived
event you will be able to handle more generic cases.



From m at m.com  Thu Apr 28 17:54:53 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 05:54:53 +0800
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
Message-ID: <42715bac_1@rain.i-cable.com>

> python -o foo.exe foo.py
>

Is that a real command that can be use?




From reinhold-birkenfeld-nospam at wolke7.net  Fri Apr 22 09:50:30 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Fri, 22 Apr 2005 15:50:30 +0200
Subject: goto statement
In-Reply-To: <116fpafinu1967a@corp.supernews.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com> <d48heh$goe$1@n6.co.ru>
	<116fpafinu1967a@corp.supernews.com>
Message-ID: <3csdt4F6p6jpnU4@individual.net>

Grant Edwards wrote:
> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
>> Grant Edwards <grante at visi.com> writes:
>>
>>> On 2005-04-21, Peter Maas <peter at somewhere.com> wrote:
>>> > Maxim Kasimov schrieb:
>>> >> but what if i just can't to do this becouse i'm working thrue ssh, and 
>>> >> have to use only installed editors (such as vi)
>>> >
>>> > - at first line of block enter: ma (mark line as 'a')
>>> > - go to last line of block
>>> > - enter :'a,.s/^/###/ (insert 3 comment chars at begin of line,
>>> >    starting from line marked as 'a' to current line)
>>> 
>>> Sure, but what about the case where his program is on paper
>>> tape and all he has for an editor is an ice pick?
>>
>> Then inserting goto doesn't seem to be an acceptable option either ;)
> 
> Scissors, tape, and a box full of prepunched "goto" and "label"
> statements.  Of course you could do the same with a bunch of
> pre-punched """ tape-chunks.

Why? You just cut out the piece of paper you want to comment, put it in
your drawer labeled "comments", and insert it again when you need it.

Reinhold


From mauriceling at acm.org  Sun Apr  3 18:03:07 2005
From: mauriceling at acm.org (Maurice LING)
Date: Mon, 04 Apr 2005 08:03:07 +1000
Subject: text analysis in python
In-Reply-To: <2bW3e.2777$hg.2203@news01.roc.ny>
References: <mailman.1255.1112523725.1799.python-list@python.org>
	<2bW3e.2777$hg.2203@news01.roc.ny>
Message-ID: <4250681B.3090300@acm.org>

Mark Winrock wrote:


> 
> You might try http://web.media.mit.edu/~hugo/montylingua/
> 
> "Liu, Hugo (2004). MontyLingua: An end-to-end natural
> language processor with common sense. Available
> at: web.media.mit.edu/~hugo/montylingua."


Thanks Mark. I've downloaded MontyLingua and it looks pretty cool. To 
me, it seems like pretty much geared to people like myself who needs 
something to process written text but do not need the hardcore bolts and 
nuts of a computational linguistist. NLTK is more of the bolts and nuts 
toolkit. GATE still seems more advanced than MontyLingua but to a 
different end.

Is there anyone in this forum that is using or had used MontyLingua and 
is happy to comment more on it? I'm happy to get more opinions.

Thanks and cheers
Maurice


From paddy3118 at netscape.net  Mon Apr 25 12:17:35 2005
From: paddy3118 at netscape.net (Paddy)
Date: 25 Apr 2005 09:17:35 -0700
Subject: Injecting code into a function
In-Reply-To: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <1114445855.802815.274090@z14g2000cwz.googlegroups.com>

Try searching for: 'python aspect-oriented' as aspect oriented
programming is about modifying existing class-methods (not exactly
functions which is what you asked for).
You might also do a search for "AOP considered harmful"
http://www.infosun.fmi.uni-passau.de/st/papers/EIWAS04/stoerzer04aop_harmful.pdf

The main point is that when you are reading the source you don't know
what the code is as it may be augmented by an "external" change.



From mefjr75 at hotmail.com  Fri Apr 22 07:54:29 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 22 Apr 2005 04:54:29 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
	<1113713669.255207.39580@f14g2000cwb.googlegroups.com>
	<1113726606.945042.71820@z14g2000cwz.googlegroups.com>
	<1113730429.336626.81360@g14g2000cwa.googlegroups.com>
	<1113732226.165477.295890@o13g2000cwo.googlegroups.com>
	<1113767235.173452.224680@z14g2000cwz.googlegroups.com>
	<1113936434.889694.81150@z14g2000cwz.googlegroups.com>
Message-ID: <1114170869.508733.241930@g14g2000cwa.googlegroups.com>

Hello Jean,
Glad to see your still playing along.
I have tested your script and it is broken too :(
Good idea about checking for the ':' , it just doesn't cover every
case.
This is the very reason I had not included docstring support before!
The problem is more diffcult than it first appears,
I am sure you have noticed ;)
Python is fairly flexible in it's layout and very dynamic in it's
execution.
This can lead to some hard to spot and hard to remove docstrings.

After staring at the problem for a day or so ( for the second time ),
*I am still stumped*

#####################################################################
# this is a test I have put together for docstrings
#####################################################################
"""This is a module doc it should be removed""" \
"This is really nasty but legal" \
'''Dang this is even worse''' + \
'this should be removed'#This is legal too
#####################################################################
assignment = \
"""
this should stay
so should this
"""
more_assignment = 'keep me,' \
           'keep me too,' \
           'keep me.'

#####################################################################
def func():
    'This should be removed' \
    """This should be removed"""
    pass
######################################################################
def funq(d = {'MyPass':
                """This belongs to a dict and should stay"""
                ,'MyOtherPass':
                'Kepp this string %s'\
"Keep this too" % 42 + """dfgffdgfdgdfg"""}):
    """This docstring is ignored""" + ''' by Python introspection
why?'''
    pass
######################################################################
def Usage():
    """This should be removed but how, removal will break the function.
This should be removed %s """# what do we do here
    return Usage.__doc__% '42'
######################################################################
class Klass:
    u"This should be removed" \
    ''' this too '''
    def __init__(self, num):
        """ This is should be removed but how ?  %d """ % num
        return None
    'People do this sometime for a block comment type of thing' \
"This type of string should be removed also"
    def func2(self):
        r'erase/this\line\sdfdsf\sdf\dfsdf'
        def inner():
            u'''should be removed'''
            return 42
        return inner
######################################################################
u'People do this sometime for a block comment type of thing' \
r"This type of string should be removed also" \
""" and this one too! """
# did I forget anything obvious ?
#####################################################################

When the docstring is removed it should also consume the blank line
that is left behind.
Got to go to work, I'll think about it over the weekend.
If anyone else wants to play you are welcome to join.
Can pyparsing do this easily?( Paul probably has a 'six-line' solution
tucked away somewhere ;)
M.E.Farmer



From tiissa at nonfree.fr  Wed Apr 20 16:13:04 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 22:13:04 +0200
Subject: What's the difference between these 2 statements?
In-Reply-To: <d46bvt$2l9$01$1@news.t-online.com>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
	<1114026007.999930.12850@f14g2000cwb.googlegroups.com>
	<d46bvt$2l9$01$1@news.t-online.com>
Message-ID: <4266b7cf$0$7202$626a14ce@news.free.fr>

Peter Otten wrote:
> ahmedt at gmail.com wrote:
> 
> 
>>so if I want to reverse it fully using s[len(s)-1:x:-1] what would x be
>>or is it impossible to express it in this way ?
> 
> 
> This does not work for integers, because the theoretically correct value 
> x = -1 already has another interpretation as the gap between the last and
> the last but one character.
AFAIK, it is not an issue of integer (what else can an slice index be in 
python?) but simply of index aliasing.

For x=-len(s)-1, you get the whole reversed list:

In [5]: s[len(s)-1:-len(s)-1:-1]
Out[5]: '54321'


From 2005a at usenet.alexanderweb.de  Sat Apr  9 14:30:07 2005
From: 2005a at usenet.alexanderweb.de (Alexander Schremmer)
Date: Sat, 9 Apr 2005 20:30:07 +0200
Subject: ntvdm problem on win2k
References: <115g61r25jhbaac@corp.supernews.com>
Message-ID: <1742sqz77o8kb.dlg@usenet.alexanderweb.de>

On Sat, 09 Apr 2005 11:00:08 -0700, Al Christians wrote:

> I started having some problems running python programs (python 2.3) from 
> the Win2k command line.  I would get crashes with an NTVDM error. 

Windows tries to execute the cygwin symbolic link and fails.
Correcting your path works (as you said).

Kind regards,
Alexander


From fredrik at pythonware.com  Mon Apr 25 10:34:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 25 Apr 2005 16:34:11 +0200
Subject: figuring out # of bytes
References: <1114201737.736514.8470@l41g2000cwc.googlegroups.com><mailman.2309.1114202268.1799.python-list@python.org><87is2cqsvc.fsf@pobox.com>
	<1114431452.925701.55600@g14g2000cwa.googlegroups.com>
Message-ID: <d4iurg$8k4$1@sea.gmane.org>

"codecraig" wrote:

> so each character in the string is 1 byte? if so, can u point me to
> somewhere that states that perhaps?

 the documentation, perhaps?

   http://www.python.org/doc/ref/types.html

   Strings

   The items of a string are characters. There is no separate
   character type; a character is represented by a string of one
   item. Characters represent (at least) 8-bit bytes. The built-in
   functions chr() and ord() convert between characters and
   nonnegative integers representing the byte values. Bytes
   with the values 0-127 usually represent the corresponding
   ASCII values, but the interpretation of values is up to the
   program. The string data type is also used to represent
   arrays of bytes, e.g., to hold data read from a file.

</F> 





From lbates at syscononline.com  Fri Apr 22 18:00:28 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 22 Apr 2005 17:00:28 -0500
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
Message-ID: <426973FC.3040503@syscononline.com>

Please post a description of what you are trying to
accomplish instead of asking us to take your possible
solution and try to figure out what the problem was.

You can do:

def foo(t, r):
    return [t**n for n in range(r)]

a=foo(2, 4)
a
[1, 2, 4, 8]

a=foo(3,6)
a
[1, 3, 9, 27, 81, 243]

but I don't really know what you want.

Larry


mehmetmutigozel at gmail.com wrote:
> I was thinking about something like the following;
> 
> 
>>>>a=[ t**n for n in range(4) ]
> 
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 't' is not defined
> 
> 
> or
> 
> 
>>>>a=[ lambda t: t**n for n in range(4) ]
>>>>t=2
>>>>a
> 
> [<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
> <function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
> 
>>>>t=3
>>>>a
> 
> [<function <lambda> at 0x403dcc6c>, <function <lambda> at 0x403dcca4>,
> <function <lambda> at 0x403dccdc>, <function <lambda> at 0x403dcd14>]
> 
> 
> is something like that possible? Will you give me advice about that?
> 


From anthra.norell at tiscalinet.ch  Thu Apr 28 17:21:06 2005
From: anthra.norell at tiscalinet.ch (Anthra Norell)
Date: Thu, 28 Apr 2005 23:21:06 +0200
Subject: Data smoothing algorithms?
Message-ID: <000c01c54c38$313eb580$0201a8c0@mcuf7>

Hi,

The following are differences of solar declinations from one day to the next, (never mind the unit). Considering the inertia of a planet, any progress of (apparent) celestial motion over regular time intervals has to be highly regular too, meaning that a plot cannot be jagged. The data I googled out of Her Majesty's Nautical Almanac are merely nautical precision and that, I suppose, is where the jitter comes in. There's got to be algorithms out there to iron it out. If it were a straight line, I could do it. But this, over the whole year, is a wavy curve, somthing with a dominant sine component. Suggestions welcome.

Frederic

< snip >
2008.05.29    -2.754  XXXXXXXXXXXXXXXXXXXXXXXXXX
2008.05.30    -2.614  XXXXXXXXXXXXXXXXXXXXXXXXXXX
2008.05.31    -2.798  XXXXXXXXXXXXXXXXXXXXXXXXXX
2008.06.01    -3.048  XXXXXXXXXXXXXXXXXXXXXXX
2008.06.02    -3.092  XXXXXXXXXXXXXXXXXXXXXXX
2008.06.03    -3.092  XXXXXXXXXXXXXXXXXXXXXXX
2008.06.04    -3.527  XXXXXXXXXXXXXXXXXX
2008.06.05    -3.385  XXXXXXXXXXXXXXXXXXXX
2008.06.06    -3.573  XXXXXXXXXXXXXXXXXX
2008.06.07    -3.820  XXXXXXXXXXXXXXX
2008.06.08    -3.865  XXXXXXXXXXXXXXX
2008.06.09    -3.865  XXXXXXXXXXXXXXX
2008.06.10    -3.865  XXXXXXXXXXXXXXX
2008.06.11    -3.865  XXXXXXXXXXXXXXX
2008.06.12    -3.429  XXXXXXXXXXXXXXXXXXX
2008.06.13    -4.011  XXXXXXXXXXXXX
2008.06.14    -4.109  XXXXXXXXXXXX
2008.06.15    -4.348  XXXXXXXXXX
2008.06.16    -4.155  XXXXXXXXXXXX
2008.06.17    -4.348  XXXXXXXXXX
2008.06.18    -4.155  XXXXXXXXXXXX
2008.06.19    -3.912  XXXXXXXXXXXXXX
2008.06.20    -4.302  XXXXXXXXXX
2008.06.21    -4.155  XXXXXXXXXXXX
2008.06.22    -4.349  XXXXXXXXXX
2008.06.23    -4.155  XXXXXXXXXXXX
2008.06.24    -3.913  XXXXXXXXXXXXXX
2008.06.25    -3.866  XXXXXXXXXXXXXXX
2008.06.26    -4.303  XXXXXXXXXX
2008.06.27    -4.155  XXXXXXXXXXXX
2008.06.28    -3.913  XXXXXXXXXXXXXX
2008.06.29    -3.866  XXXXXXXXXXXXXXX
< snip >

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From dcrespo at gmail.com  Fri Apr 22 17:28:55 2005
From: dcrespo at gmail.com (dcrespo)
Date: 22 Apr 2005 14:28:55 -0700
Subject: PDF Printing support from Python
In-Reply-To: <87oec6levh.fsf@pobox.com>
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<87oec6levh.fsf@pobox.com>
Message-ID: <1114205335.172145.26140@o13g2000cwo.googlegroups.com>

> That doesn't sound like a fundamental problem with AR 5.1 to me --
sounds like you just need to ask it more nicely ;-)

AR 7.0 has the function to print exactly the page size you set. AR 5.1
doesn't. Instead, it print it on an existing page size like letter, but
without changing the relative layout of the each line of text respect
each other.

Daniel



From lbates at syscononline.com  Wed Apr  6 09:24:37 2005
From: lbates at syscononline.com (Larry Bates)
Date: Wed, 06 Apr 2005 08:24:37 -0500
Subject: How to detect windows shutdown
In-Reply-To: <d303gk$btk$1@netnews.hinet.net>
References: <d303gk$btk$1@netnews.hinet.net>
Message-ID: <waCdnffBhpFgf87fRVn-rg@comcast.com>

Programs that start at boot, run until shutdown and run in
background all the time under Windows are good candidates
for being turned into Windows Services.  They respond to
shutdown commands properly and can be fine-grained scheduled
as well.  For tutorial pick of a copy of Python Programming
on Win32 (Hammond and Robinson) and use Mark Hammonds Python
Windows extension library.

Larry Bates


Austin wrote:
> I wrote a program running on windows.
> I put the link of the program in "Start up" folder and let it executed 
> minimized.
> Every time when I open the computer, my program will be running in system 
> tray.
> 
> But if the user would like to shutdown the computer, the OS will show an 
> error about exception.
> 
> At first, I think windows will terminate all processes when it shutdown.
> So, if python has the way to dectect shutdown process, I can kill the 
> process in advance.
> 
> Thanks a lot. 
> 
> 


From greg at cosc.canterbury.ac.nz  Thu Apr 21 01:08:37 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 21 Apr 2005 17:08:37 +1200
Subject: Enumerating formatting strings
In-Reply-To: <d44vgg$jmr$04$1@news.t-online.com>
References: <mailman.2061.1113855968.1799.python-list@python.org>
	<3cm9r2F6nif67U1@individual.net>
	<d44vgg$jmr$04$1@news.t-online.com>
Message-ID: <3coqr3F6l3c64U1@individual.net>

Peter Otten wrote:
> Greg Ewing wrote:
>>
>>This seems to happen even with a custom subclass of tuple,
>>so it must be doing an exact type check.
> 
> No, it doesn't do an exact type check, but always calls the tuple method:

I guess you mean len(). On further investigation,
this seems to be right, except that it doesn't
invoke a __len__ defined in a custom subclass.
So there's something in there hard-coded to
expect a built-in tuple.

In any case, the original idea isn't possible.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From tzot at sil-tec.gr  Mon Apr 18 12:07:20 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 18 Apr 2005 19:07:20 +0300
Subject: How standard is the standard library?
References: <d40kif$qs0$1@domitilla.aioe.org>
Message-ID: <tnm761tuaq0drdekpl40uin2t8k8l8ku3s@4ax.com>

On Mon, 18 Apr 2005 11:43:15 -0400, rumours say that "steve.leach"
<stevenaleach at mac.com> might have written:

>Newbie question: Looking through my stack of books and various on-line 
>references, I have seen several libraries and library functions listed 
>as depreciated.
>
>Is there a road map or concrete list of what parts of the standard 
>library are to be considered reliable and permanent?  Coming from C, I 
>am used to library functions being set in stone.

[snip]

You didn't mention any reading of PEP 4 (which would be obvious by a
simple google search), so take a look at this:

http://www.python.org/peps/pep-0004.html
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From finite.automaton at gmail.com  Tue Apr 26 13:35:03 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 26 Apr 2005 10:35:03 -0700
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<1114451147.737426.207980@z14g2000cwz.googlegroups.com>
	<1114457804.600476.324860@o13g2000cwo.googlegroups.com>
	<1114470993.307543.133770@z14g2000cwz.googlegroups.com>
	<1114493251.818250.6580@g14g2000cwa.googlegroups.com>
Message-ID: <1114536903.318545.155790@g14g2000cwa.googlegroups.com>

> I think that Your trace_returns function is actually a global trace
> that returns itself and does not handle the 'call' event.

By returning itself, the global trace also becomes the local trace.
The code in bdb.py does the same thing---  self.trace_dispatch is set
as the global trace, and returns self.trace_dispatch via
self.dispatch_call(frame, arg)



From andy at reportlab.com  Fri Apr  1 07:38:47 2005
From: andy at reportlab.com (andy at reportlab.com)
Date: Fri, 01 Apr 2005 04:38:47 -0800
Subject: 3 weeks to go to Python-UK!
Message-ID: <andyrobinson-0V9koAz+DH+kt6rbfDXOkTAHiTOu59o@mailblocks.com>

There are just three weeks to go to Python-UK!

The UK Python conference is once again taking place at the
Randolph Hotel in the centre of historic Oxford, as part of
the ACCU conference, on 21-23 April.

    http://www.accu.org/conference/python.html

On Tuesday 19th there's also a full day tutorial for intermediate
and advanced Python programmers, given by Michele Simionato,
at a fraction of the price of most professional training courses.
There are just a few places remaining, so book quickly!

    http://www.accu.org/conference/python_tutorial.html

Anyone attending the event is free to move between tracks and learn
from a world-class program on patterns, agile development,
Java, C++ and C# as well as Python.


Best Regards,


Andy Robinson
Python-UK Conference chair


From john at castleamber.com  Tue Apr 26 01:02:40 2005
From: john at castleamber.com (John Bokma)
Date: 26 Apr 2005 05:02:40 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<86is2anqbj.fsf@guru.mired.org>
Message-ID: <Xns964467144Dcastleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <john at castleamber.com> writes:

>> You already showed code like:
> 
> Actually, I never showed you this code.

hence *like*, and yes you did, in a footnote.

> In this case, the good rewrite invokes the well-known logical operator
> "not":
> 
> if not condition then
>    something

unless condition then
    	something

Weird, we use constructions like that in normal language all the time, 
and when we program it's suddenly bloat?

>>>> it makes the code more readable.
>>> Then why do most Perl programmers consider unless "! a good idea"?
>> Reread the last part of the last sentence you quoted above.
> 
> I can't - in being argumentative, you neglected to include it.

*sigh* in your obsession to call me argumentative, your skipped over it:
"it makes the code more readable"

>> wasn't creating some silly list. The etc was a giveaway.
> 
> Um, I suggest you brust up on your English skills.
                    ^^^^^

> What you created was a list. Not in Python or Perl, but in English.

I doubt if any Perl programmer in the given context would have any 
problem with it, but lets drop it.

> Oh, I understood it.

Sure, is that why you talked about a tuple? But, lets drop it.

> And so far, I've only said *two* things were wrong with Perl. One is
> that it provides more than one way to do things - which point you've
> made for me by arguing about how you did/didn't choose the right one
> in an example.

If you think I gave a wrong example, give the right one. The only reason 
for an argument was your lack of knowledge about split and map, which 
only tells something about you, not Perl.

> I also said that it's failure to flag assigning the
> output of map/grep (there's that multiple choices thing again)

There is that lack of understanding again: map and grep are two 
different things. I can't help if you consider map/grep a *choice*

> to a
> scalar when you wanted a list was bad. You haven't argued that I was
> wrong about Perl in either case.

*sigh* if you want a list, you assign it to something that can handle a 
list. If you assing a list to a scalar, you get the count. So if you 
want to select items out of a list on a criteria, you use grep in a list 
context, if you want to count the items, guess...

>> Amazing, how can you debug if you know next to nothing of it?
> 
> So either your assessment of my skills is *way* off, or I'm an
> *amazing* programmer.

If you consider map/grep a multiple choice, what do you think? 
(rethorical question).

>> It's also a restriction. Why do you think in Java one can call the gc
>> explicitly?
> 
> If it's a restriction, there must be something it restricts you from
> doing. Care to tell me exactly what garbage collection keeps you from
> doing?

real time guaranteed memory allocation/deallocation (which might be 
fixed by now in Java)

>> In my case it saves time the other way around, I consider correct
>> usage trivial, but the typing all the time...
> 
> I guess you haven't had to chase many bugs related to missing free's

In my own code? I can't remember. In code written by other people: in 
the cases they forget to free memory they did so many other things wrong 
that I sincerly hope they have found other work by now.

> skilled programmers, and makes wrong choices painful. TMTOWTDI makes
> wrong choices - or ugly code - easy.

Especially if one keeps mixing up map and grep :-D

> Which is one of the reasons that
> multiple nearly identical constructs is a bad design.

Worse is when self proclaimed perl programmers call map and grep 
identical constructs...

> So the jvm implementations you're familiar with have really bad
> garbage collectors.

I have no idea if this has changed recently. The last thing I read about 
it is that there are 4 kinds of garbage collection one can select in 
Sun's implementation.

> A good programmer won't immediately abandon either
> Java or garbage collection. They'd check out other implementations of
> the jvm to see if one of those has a better garbage collector.

Uhm, people often pick Java because of write once, run everywhere. So 
that is not always, or even rarely an option.

> another. There are probably others as well. You can't simply tag one
> as "better" without knowing what the problem domain is.

I didn't say better, what I meant: there are situations real time 
free/alloc is prefered, unless my knowledge of gc in general is 
outdated.

>> I haven't been using *foreach* for quite some time, I use *for* all
>> the time. Which is just because I am lazy.
> 
> You make my case for me. You write in a subset of Perl that excludes
> "foreach". Is that the "absolute beginner" or the "beginner" subet?
> Or maybe it's a subset that doesn't depend on the skill level of the
> programmer.

"The foreach keyword is just a synonym for the for keyword, so you can 
 just use foreach and for interchangeably, whichever you think is more 
 readable in a given situation" (Programming Perl, 3rd edition, p118)

>> You used Perl 3!?? LOL! For what? To write poetry? I mean, if you
>> used version 3, and you still make extremely basic mistakes...
> 
> No, I wrote systems adminstration utilities in Perl 3. I wrote web
> application in Perl 4. I just maintain Perl 5. Your "basic mistakes"
> was forgetting the warts on strip. BFD.

The BFD was calling map / grep a *choice*. I am not sure about for and 
foreach, it could be that you call for $item ( @list ) a foreach loop, 
which I hope. Otherwise, if you really thought there where two 
*different* loop ops (as you wrote) then there is another BFD to add.

>>> Which would you trust more - a programmer who had to unlearn all his
>>> bad habits, or one who never had the chance to develop them?
>> Neither, and think about that for some time.
> 
> So you write all your code yourself,

Ok, let me rephrase that: think about that for a long time.

>> So you got stuck with Perl 3 somehow?
> 
> I got stuck with the latest version of Perl that was available. It was
> a major improvement over shell scripts. That's not saying a lot, even
> today - and shell scripting has improved since then.

Perl 1.0?

>>> Even if it is true, the point still stands - Perl programs are less
>>> maintainable than Python programs. I maintain that the difference in
>>> philosphy on the number of ways to do things is a cause for that.
>> But to me, you don't sound qualified to make that statement, your
>> Perl skills are, well, rusty.
> 
> Ok, ask in both groups. See how many people you find that maintain
> both who feel that each is better. I'm positive you'll find the
> majority who do both find Python programs more maintainable.

I just did (asking). And hope to be able to answer your question in a 
year or so. Oh, and I want to add to your latter sentence: code written 
by programmers who didn't learn Perl in 3 hours by downloading and 
editing CGI scripts.

>>> A good programmer will compare the toolset to others he's familiar
>>> with,
>> which only can be done when he/she knows both (almost) equally well.
> 
> Nope. A quick survey of a toolset is all that's needed to make a first
> approximation as to it's quality - to someone who's familiar with
> enough toolsets, anyway.

Weird: I am going study Python for at least one year. Unless you call 
that a quick survey :-D.

> A good understanding of toolset design allows you to point out flaws
> in a toolset without becoming intimately familiar with it. For
> instance, mutliple nearly identical ways to express the same construct
> is always a flaw in a toolset. Which has been the point I've been
> making the whole time.

So a hammer is a bad tool, since one can use a scewdriver...

I always wondered why an artist, like for example a painter, has so many 
nearly identical tools...

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


From maxm at mxm.dk  Fri Apr  8 14:19:24 2005
From: maxm at mxm.dk (Max M)
Date: Fri, 08 Apr 2005 20:19:24 +0200
Subject: Can dictionary values access their keys?
In-Reply-To: <d36fp0$suk$1@vegh.ks.cc.utah.edu>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
	<mailman.1544.1112978919.1799.python-list@python.org>
	<d36fp0$suk$1@vegh.ks.cc.utah.edu>
Message-ID: <4256cafe$0$238$edfadb0f@dread12.news.tele.dk>

Matthew Thorley wrote:

> I am creating an object database to store information about network
> devices, e.g. switches and routers.


Possible usefull pages?

http://www.python.org/doc/essays/graphs.html

more at:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/119466


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From tiissa at nonfree.fr  Mon Apr 18 17:15:34 2005
From: tiissa at nonfree.fr (tiissa)
Date: Mon, 18 Apr 2005 23:15:34 +0200
Subject: Tkinter Event Types
In-Reply-To: <1113857330.024552.245040@f14g2000cwb.googlegroups.com>
References: <1113857330.024552.245040@f14g2000cwb.googlegroups.com>
Message-ID: <42642375$0$10322$636a15ce@news.free.fr>

codecraig wrote:
> Hi,
>   When I do something like.
> 
> s = Scale(master)
> s.bind("<ENTER>", callback)
> 
> def callback(self, event):
>     print event.type
> 
> I see "7" printed out.  Where are these constants defined for various
> event types?  Basically i want to do something like...
7 must be for KeyPressed.
That's the type of the event (among Activate, Button, KeyPressed...).

> 
> def callback(self, event):
>     if event.type == ENTER:
>         print "You entered"

You may want to look at event.keycode (36 for Return).



From modelnine at ceosg.de  Sat Apr  9 08:47:56 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sat, 9 Apr 2005 14:47:56 +0200
Subject: change the date string into timestamp
In-Reply-To: <d389gv$8e8$1@sea.gmane.org>
References: <20050409095116.4371.qmail@web8409.mail.in.yahoo.com>
	<d389gv$8e8$1@sea.gmane.org>
Message-ID: <200504091447.59641.modelnine@ceosg.de>

Am Samstag, 9. April 2005 12:10 schrieb Fredrik Lundh:
> >>> from email.Utils import parsedate_tz
> >>> parsedate_tz(formatdate(x, localtime=1))
>
> (2005, 4, 8, 14, 22, 14, 0, 1, 0, 7200)

Very cool! Learning something new every day!

-- 
--- Heiko.
listening to: Pearl Jam - Dissident
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From vze4rx4y at verizon.net  Sun Apr 10 23:28:12 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Mon, 11 Apr 2005 03:28:12 GMT
Subject: Why does StringIO discard its initial value?
References: <XEb6e.556$Cz3.49700@monger.newsread.com>
Message-ID: <g9m6e.6295$ff4.1793@trndny08>

[Leif K-Brooks]
> The obvious workaround is to call buffer.write() with the initial value
> instead of passing it to StringIO's constructor,

More than just a workaround, it is the preferred approach.
That makes is easier to switch to cStringIO where initialized objects are
read-only.



> Is this the
> expected behavior

Yes.



> , and why it isn't mentioned in the docs if so?

Per your request, the docs have been updated.



Raymond Hettinger




From bronger at physik.rwth-aachen.de  Wed Apr 20 12:24:45 2005
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 20 Apr 2005 18:24:45 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<s9zu0m1mpry.fsf@thetis.intevation.de>
	<87fyxlqwct.fsf@wilson.rwth-aachen.de>
	<s9z7jixmnn7.fsf@thetis.intevation.de>
Message-ID: <87br89quuq.fsf@wilson.rwth-aachen.de>

Hall?chen!

Bernhard Herzog <bh at intevation.de> writes:

> Torsten Bronger <bronger at physik.rwth-aachen.de> writes:
>
>>> http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF
>>
>> I see only one argument there: "Inclusion of the upper bound
>> would then force the latter to be unnatural by the time the
>> sequence has shrunk to the empty one."  [...]
>
> The other main argument for startig at 0 is that if you do not
> include the upper bound and start at 1 then the indices i of a
> sequence of N values are 1 <= i < N + 1 which is not as nice as 0
> <= i < N.  opportunity for an off by one error.

The alternative is starting with 1 and using "lower <= i <= upper".
(Dijkstra's second choice.)

> Then there's also that, starting at 0, "an element's ordinal
> (subscript) equals the number of elements preceding it in the
> sequence."

Granted, but you trade such elegancies for other uglinesses.  A
couple of times I changed the lower limit of some data structure
from 0 to 1 or vice versa, and ended up exchanging a "+1" here for a
"-1" there.

It's a matter of what you are accustomed to, I suspect.  We
(programmers) think with the 0-notation, but non-spoiled minds
probably not.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus


From tom.cocagne at gmail.com  Tue Apr 26 23:48:22 2005
From: tom.cocagne at gmail.com (Tom Cocagne)
Date: Tue, 26 Apr 2005 23:48:22 -0400
Subject: Problem with embedded python
References: <mailman.2546.1114552893.1799.python-list@python.org>
Message-ID: <116u2pfsesg1ae2@corp.supernews.com>


 From looking at your example, it looks like you're making the problem FAR
more difficult than it needs to be. The main thing to keep in mind is that
Python threads do not correspond to operating system threads. In an
application using a single OS-level thread, you can use as many Python
threads as you like. The thread-switching mechanism in Python is to
transfer control between threads after the execution of 100 bytecodes. The
GIL is used to insure that only 1 operating system thread is executing
bytecodes at any given time. This allows os threads to sleep on blocking
calls (usually I/O) without necessarily stalling the interpreter.

 Your example appears to be written under the assumption that the spawned
Python thread will operate concurrently with your main thread. That will
not be the case. The PyRun_SimpleString() call will operate entirely within
the main thread and will not return until the Python thread has completed
operation (so no GIL manipulation is needed). The subsequent Sleep() call
will simply halt the process for 300ms. 

 Regular threading is difficult enough to get right without throwing the
Python-thread / OS-thread interaction into the mix. It's a tough nut to
crack so don't feel bad if it takes a while to get everything straight ;-)
The quickest and most practical approach would probably be to read through
some code that's similar to what you're shooting for. I'd suggest taking a
look at some of the modules in the Python source code (particularly the
network related ones) to get a better handle on how threads are managed. 

 Cheers,

 Cocagne


Ugo Di Girolamo wrote:

> I have the following code, that seems to make sense to me.
> 
> 
> However, it crashes about 1/3 of the times.
> 
> 
> My platform is Python 2.4.1 on WXP (I tried the release version from
> the msi and the debug version built by me, both downloaded today to
> have the latest version).
> 
> 
> The crash happens while the main thread is in Py_Finalize.
> I traced the crash to _Py_ForgetReference(op) in object.c at line 1847,
> where I have op->_ob_prev == NULL.
> 
> 
> What am I doing wrong? I'm definitely not too sure about the way I'm
> handling the GIL.
> 
> 
> Thanks in adv for any suggestion/ comment
> 
> 
> Cheers and ciao
> 
> 
> Ugo
> 
> 
> ////////////////////////// TestPyThreads.py //////////////////////////
> #include <windows.h>
> #include "Python.h"
> 
> 
> int main()
> { 
>         PyEval_InitThreads();
>         Py_Initialize();
>         PyGILState_STATE main_restore_state = PyGILState_UNLOCKED;
>         PyGILState_Release(main_restore_state);
> 
> 
>         // start the thread
>         { 
>                 PyGILState_STATE state = PyGILState_Ensure();
>                 int trash = PyRun_SimpleString(
>                                 "import thread\n"
>                                 "import time\n"
>                                 "def foo():\n"
>                                 "  f = open('pippo.out', 'w', 0)\n"
>                                 "  i = 0;\n"
>                                 "  while 1:\n"
>                                 "    f.write('%d\\n'%i)\n"
>                                 "    time.sleep(0.01)\n"
>                                 "    i += 1\n"
>                                 "t = thread.start_new_thread(foo, ())\n"
>                                 );
>                 PyGILState_Release(state);
>         }
> 
> 
>         // wait 300 ms
>         Sleep(300);
> 
> 
>         PyGILState_Ensure();
>         Py_Finalize();
>         return 0;
> 
> }



From littlejohn.75 at news.free.fr  Sun Apr 17 17:10:05 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 17 Apr 2005 21:10:05 GMT
Subject: distutils question: different projects under same namespace
References: <1113639634.729450.191360@l41g2000cwc.googlegroups.com>
Message-ID: <4262d0ad$0$813$636a15ce@news.free.fr>

Le 16 Apr 2005 01:20:34 -0700, Qiangning Hong a ?crit :
> To avoid namespace confliction with other Python packages, I want all
> my projects to be put into a specific namespace, e.g. 'hongqn' package,
> so that I can use "from hongqn.proj1 import module1", "from
> hongqn.proj2.subpack1 import module2", etc.
That makes sense
> 
> These projects are developed and maintained and distributed seperately,
> so I should not make a whole 'hongqn' package with one setup.py.  I
> must write setup.py scripts for each project.  I meet a problem here.
> 
> For instance, I am writing setup.py script for proj1. I use the
> following parameters when calling distutils.core.setup:
> 
> setup(
>     ...
>     package_dir = {'hongqn.proj1': 'proj1'},
>     packages = ['hongqn.proj1'],
>     ...
> )
> 
> "python setup.py install" will create /usr/lib/python2.3/hongqn/proj1
> directory and copy proj1/*.py there.  But this is UNUSABLE!  There is
> NO __init__.py file under /usr/lib/python2.3/hongqn/ so that import
> hongqn.proj1 will fail!
You can detect if there is __init__.py in the hongqn directory.
> 
> I am considering manually create this __init__.py by hacking the
> install_lib command.  But before making my hands dirty,  I want to know
> if there is an "official" solution exists or others have already
> success stories on this matter.
It seems that this problem is tackled in the logilab packages : for
example, you install first the logilab common libraries and then pylint.
So the problem is to define the dependencies of your projects and hence
the order of installation.
> 
> As a note, I wish the solution can handle setup.py bdist and
> bdist_wininst well.
> 


From rbt at athop1.ath.vt.edu  Tue Apr  5 08:39:05 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 05 Apr 2005 08:39:05 -0400
Subject: Change between Python 2.3 and 2.4 under WinXP
In-Reply-To: <4251d375$0$23625$9b622d9e@news.freenet.de>
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com><mailman.1280.1112603141.1799.python-list@python.org>	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>
	<mailman.1299.1112626394.1799.python-list@python.org>
	<4251d375$0$23625$9b622d9e@news.freenet.de>
Message-ID: <d2u0t9$lbp$1@solaris.cc.vt.edu>

Martin v. L?wis wrote:

> Of course, it is not all that clear what the OP actually wanted.
> For all we know, he wanted to "alternate quickly (with batch
> file or similary) between python23 and python24"...

Maybe off-topic for this thread, but I noticed that when installing 
2.4.1 that 2.4.0 is automatically removed. Does 2.4 do the same thing to 
2.3 versions?


From aisaac0 at verizon.net  Sun Apr 24 22:33:33 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Mon, 25 Apr 2005 02:33:33 GMT
Subject: cross platform printing
References: <0hx4e.3479$3O2.2184@trnddc01>
	<mVa5e.6469$6k4.803027@news20.bellglobal.com>
Message-ID: <1GYae.2601$Nc.903@trnddc05>

> Alan Isaac wrote:
> > What is the current best practice for cross platform printing of
PostScript
> > files from Python?

"Warren Postma" <wp at tekran.spammenziemichnichtdankeschon.com> wrote in
message news:mVa5e.6469$6k4.803027 at news20.bellglobal.com...
> Well since printing postscript files on most Unix systems (probably
> including Mac OSX although I don't really know this for sure) is
> trivially easy, why not investigate using cygwin  on Windows and
> launching an "lpr" task from your python script that prints the given
> postscript file. Implementation time on Unix: 0 minutes, 0 seconds.
> Implementation time on Windows; the time it takes make a cygwin batch
> file that prints using ghostscript.

I meant something that application users on different platforms can print
with, not something
that they could coerce a platform into supporting given enough energy (e.g.,
via Cygwin).
The closest to an option so far seems to be to generate PDF and assume an
application is available to print it.  Not beautiful.

Alan Isaac




From saint.infidel at gmail.com  Thu Apr 14 10:58:33 2005
From: saint.infidel at gmail.com (infidel)
Date: 14 Apr 2005 07:58:33 -0700
Subject: EOF-file missing
In-Reply-To: <d3m09j$12m2$1@news.uit.no>
References: <d3m09j$12m2$1@news.uit.no>
Message-ID: <1113490713.843269.177570@l41g2000cwc.googlegroups.com>

You can use the Content-Length header to tell the server how long the
string is.



From fiedzia at fiedzia.prv.pl  Mon Apr 25 12:38:12 2005
From: fiedzia at fiedzia.prv.pl (Maciej Dziardziel)
Date: Mon, 25 Apr 2005 18:38:12 +0200
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
Message-ID: <20050425163813.67F3.0.NOFFLE@fiedzia.homeip.net>

dcrespo wrote:

> Hi all...
> 
> I think wxPython is much better than PyGTK. First of all, PyGTK needs
> the GTK runtime installed, whereas wxPython is entirely Python's
> modules, so It facilitates the apps' distribution.

As already mentioned, it is not true. You will still need GTK
(on Linux, not on Windows).

> Also, PyGTK uses 
> specific controls or widgets of GTK, while wxPython uses native
> controls of the platform where the app is running.

Which has both pros and cons. wx unification isn't perfect (i had some
problems with drawing that required some workarounds specific to a
platform), it also doesn't allow you to really (or at least easy) use
platform specific functionality (GTK app can be easily convert to GNOME
app).

> I'm learning both, but at a slow step, so I want to know all the
> comments about this subject in this group.

Go to www.pygtk.org, there are many tutorials, faq and other documentation
and try it. 
 
> I heard about Glade to make the graphic layout of the app and then
> export it as XML. Then, it connects to PyGTK. The problem I see is that
> What if you want to refer to a state of a specific radiobutton of a
> radobutton's group? It seems to be very troublesome.

Do not listen, just test it. For me glade is the best way to define user
interface. This is the way GUI should be created IMHO. You can access any
widget just by calling its name - you will find details in any glade
tutorial.
 
> Please, post any comments about the pros and cons of each library, and
> the proper way to construct the graphic layout (generating XML through
> Glade, or by hand-code). Thanks.

I don't have much experience with GTK on Windows, but i really like on
Linux, way more then wx. It works great, is well documented (including
python specific issues) and possible GNOME integration might be great help.

-- 
Maciej "Fiedzia" Dziardziel (fiedzia (at) fiedzia (dot) prv (dot) pl)
www.fiedzia.prv.pl

Music is the art of thinking with sounds.


From kasimov at i.com.ua  Thu Apr 21 08:10:54 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Thu, 21 Apr 2005 15:10:54 +0300
Subject: goto statement
In-Reply-To: <d483v0$ch1$1@n6.co.ru>
References: <mailman.2158.1113989043.1799.python-list@python.org>
	<dqCdneMCDr764fvfRVn-tA@powergate.ca>
	<426767FD.5050104@i.com.ua> <d483v0$ch1$1@n6.co.ru>
Message-ID: <d485ds$n8n$1@news.tsystems.kiev.ua>

Sergei Organov wrote:
> Maxim Kasimov <kasimov at i.com.ua> writes:
> 
> 
>>1. comment for debug
>>
>>    It can be used in the same way, as the comments for debugging are
>>    used, but it will be easier than to use """ or ''', or using
>>    features of text-editors, when it is necessary to comment piece of
>>    code which already contains ''' or/and """ strings already, or
>>    there is another #-comments. Using goto, you do not need to edit a
>>    code, which is unfamiliar to you.
> 
> 
> .... and then you end up with situation when another goto jumps directly
> into the body of the code you've just "commented" with your goto. Happy
> debugging!
> 
> BTW, don't you want "comefrom" statement to be added to the language
> to make debugging even more fun?
> 

if you can't control what you do - it is you private problem, not mine. Is't it?

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From kasimov at i.com.ua  Wed Apr 20 09:13:32 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 16:13:32 +0300
Subject: goto statement
In-Reply-To: <87vf6hlkix.fsf@wilson.rwth-aachen.de>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
Message-ID: <d45kna$f1o$1@news.tsystems.kiev.ua>

Torsten Bronger wrote:
> Hall?chen!
> 
> Maxim Kasimov <kasimov at i.com.ua> writes:
> 
> 
>>[...]
>>
>>WOW, just greate! ... but i'd like to relax at some more
>>interesting way than to comment each of rows
>

but what if i just can't to do this becouse i'm working thrue ssh, and have to use only installed editors (such as vi)

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From bserviss at triad.rr.com  Fri Apr 22 22:02:33 2005
From: bserviss at triad.rr.com (bserviss)
Date: 22 Apr 2005 19:02:33 -0700
Subject: Dictionary question.
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
	<1114129715.038945.227200@o13g2000cwo.googlegroups.com>
	<42684d5b$1_3@newspeer2.tds.net>
	<7bvg61d59ngm0hv9t897l3tb51v3hne2q1@4ax.com>
Message-ID: <1114221753.485768.199030@g14g2000cwa.googlegroups.com>

A simple way to get individual values for the distribution is:

d = {}
for i in range( 0, 1000):
    j = random.randrange( 0, 100)
    if d.has_key(j):
        d[j] += 1
    else:
         d[j] = 1

keys = d.keys()
keys.sort()
for key in keys:
    print key, ":", "*" * d[key]



From bokr at oz.net  Fri Apr 29 16:12:48 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 29 Apr 2005 20:12:48 GMT
Subject: Working with method-wrapper objects
References: <1830947848@web.de>
	<mailman.4.1114734744.14961.python-list@python.org>
Message-ID: <4272274e.213437757@news.oz.net>

On Thu, 28 Apr 2005 11:33:04 +0200, "Dr. Peer Griebel" <griebel at konzept-is.de> wrote:

>Peer Dr. Griebel wrote:
[..]
>> Why has [].__str__ a different type than object.__str__?
>> Why is object.__str__ a routine while object().__str__ not?
Why wouldn't you expect different types? Those are different expressions.

If they were types and instances of your own making,
like class Foo(object) and Foo(), wouldn't you expect
a difference between Foo.method and Foo().method ?

There are a lot of tricky details in the way a method function
is found and what is done with it depending on how it was found.
Descriptors play a huge role in this, so if you are really interested
you must read about those. Note that in order to find an attribute,
you first have to look for the attribute '__getattribute__' to make sure
nothing is overriding the normal function. But what is normal? If you
look for '__getattribute__' anyway, maybe just let that search find
what it will, which will be type.__getattribute__


When you write obj.attr you are kicking off a search for an attribute
named 'attr' starting the search in type(obj).__dict__ and the rest of
the __dict__'s of the base classes in mro order. If the attribute object
has a __get__ method, it is a descriptor, say descr, and the attribute value
finally returned will be whatever the descr returns on being called like
descr.__get__(self, type(self)). So when you look at something like [].__str__
think of it in terms of obj.attr. What kind of obj is []? (it's a list instance,
just as you'd get from list(), analogous to object(), which produces and object instance).

To find the '__str__' attribute, or any attribute, you start in type(obj).mro()[0].__dict__
and see if the immediate base has a method or other descriptor of that name.
If not, you go on through the list with type(obj).mro()[1].__dict__ etc. E.g., for an obj
that is a list instance:

 >>> obj = []
 >>> type(obj).mro()
 [<type 'list'>, <type 'object'>]
 >>> type(obj).mro()[0]
 <type 'list'>
 >>> type(obj).mro()[0].__dict__
 <dictproxy object at 0x02E8159C>
 >>> type(obj).mro()[0].__dict__['__str__']
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 KeyError: '__str__'
 >>> type(obj).mro()[1]
 <type 'object'>
 >>> type(obj).mro()[1].__dict__
 <dictproxy object at 0x02E81794>
 >>> type(obj).mro()[1].__dict__['__str__']
 <slot wrapper '__str__' of 'object' objects>
 >>> type(obj).mro()[1].__dict__['__str__']()
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: descriptor '__str__' of 'object' object needs an argument
 >>> type(obj).mro()[1].__dict__['__str__'](obj)
 '[]'

 >>> obj = [1, 2, '(specific instance)']
 >>> type(obj).mro()[1].__dict__['__str__'](obj)
 "[1, 2, '(specific instance)']"

Now suppose obj is list instead of [], analogous to object instead of object():

 >>> obj = list
 >>> type(obj).mro()
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: descriptor 'mro' of 'type' object needs an argument
 >>> type(obj).mro(obj)
 [<type 'list'>, <type 'object'>]
 >>> type(obj).mro(obj)[0].__dict__['__str__']
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 KeyError: '__str__'
 >>> type(obj).mro(obj)[1]
 <type 'object'>
 >>> type(obj).mro(obj)[1].__dict__['__str__']
 <slot wrapper '__str__' of 'object' objects>
 >>> type(obj).mro(obj)[1].__dict__['__str__']()
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: descriptor '__str__' of 'object' object needs an argument
 >>> type(obj).mro(obj)[1].__dict__['__str__'](obj)
 "<type 'list'>"

Note that the error message above is saying __str__ is a descriptor, so let's see what methods it has:

 >>> dir(type(obj).mro(obj)[1].__dict__['__str__'])
 ['__call__', '__class__', '__delattr__', '__doc__', '__get__', '__getattribute__', '__hash__', '
 __init__', '__name__', '__new__', '__objclass__', '__reduce__', '__reduce_ex__', '__repr__', '__
 setattr__', '__str__']

It has its own __str__ to show itself:

 >>> type(obj).mro(obj)[1].__dict__['__str__'].__str__()
 "<slot wrapper '__str__' of 'object' objects>"

which is what we get if we let the interactive evaluator show it to us:

 >>> type(obj).mro(obj)[1].__dict__['__str__']
 <slot wrapper '__str__' of 'object' objects>

But we saw it has a __get__ method, and that is acting a lot like the __get__ method
of an ordinary method, e.g., if we give it the object, we get a callable that acts
like a bound method:

 >>> bmlike = type(obj).mro(obj)[1].__dict__['__str__'].__get__(obj)
 >>> bmlike
 <method-wrapper object at 0x02EF196C>
 >>> bmlike()
 "<type 'list'>"

 >>> obj
 <type 'list'>

Note that:

 >>> type(list).mro(list)[1].__dict__['__str__'] is type(object).mro(object)[0].__dict__['__str__']
 True

which is because

 >>> type(list).mro(list)[1] is type(object).mro(object)[0]
 True

I.e., '__str__' is found in the same base class either way

 >>> type(list).mro(list)[1]  , type(object).mro(object)[0]
 (<type 'object'>, <type 'object'>)

If you want to twist your mind some more, note that __getattribute__ is itself an attribute
involved in finding attributes, and __dict__ may not be an ordinary attribute either ;-)

>> 
>> And one again my question: Can I extract some more information about a
>> methed-wrapper object. E.g. can I somehow determine the arg spec?
I believe it is a descriptor, and as such has at least a __get__ method,
and to be callable itself, a __call__ method. I think the latter being a method wrapper
probably effectively does wrapper.__get__(obj, type(obj))(*args, **kw)
when you do wrapper.__call__(obj, *args, **kw)), which you do when you
do wrapper(obj, your_args, your_keywords)

E.g., taking an ordinary class may show it more clearly:

 >>> class Foo(object):
 ...    def m(self, *args, **kw): return self, args, kw
 ...
 >>> foo = Foo()
 >>> type(foo).mro()
 [<class '__main__.Foo'>, <type 'object'>]
 >>> type(foo).mro()[0].__dict__
 <dictproxy object at 0x02E8147C>
 >>> type(foo).mro()[0].__dict__['m']
 <function m at 0x02EE8D4C>
 >>> type(foo).mro()[0].__dict__['m'].__get__
 <method-wrapper object at 0x02EF1A6C>
 >>> type(foo).mro()[0].__dict__['m'].__get__(foo, type(foo))
 <bound method Foo.m of <__main__.Foo object at 0x02EF1BAC>>
 >>> type(foo).mro()[0].__dict__['m'].__get__(foo, type(foo)).__call__
 <method-wrapper object at 0x02EF1CAC>
 >>> type(foo).mro()[0].__dict__['m'].__get__(foo, type(foo)).__call__('arg', k='keyword')
 (<__main__.Foo object at 0x02EF1BAC>, ('arg',), {'k': 'keyword'})

Now you can try the same with inherited methods like __str__ that are built-in, e.g., substitute
foo = [1, 2, 'this is a particular list instance'] and note similarities, if you realize what is a
dscriptor and follow the same kind of logic to the final method call via __call__

 >>> foo = [1, 2, 'this is a particular list instance']
 >>> type(foo).mro()
 [<type 'list'>, <type 'object'>]
 >>> type(foo).mro()[0].__dict__
 <dictproxy object at 0x02E813EC>
 >>> type(foo).mro()[0].__dict__['__str__']
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 KeyError: '__str__'
 >>> type(foo).mro()[1].__dict__['__str__']
 <slot wrapper '__str__' of 'object' objects>
 >>> type(foo).mro()[1].__dict__['__str__'].__get__
 <method-wrapper object at 0x02EF1AEC>
 >>> type(foo).mro()[1].__dict__['__str__'].__get__(foo, type(foo))
 <method-wrapper object at 0x02EF1BAC>
 >>> type(foo).mro()[1].__dict__['__str__'].__get__(foo, type(foo)).__call__
 <method-wrapper object at 0x02EF1D2C>
 >>> type(foo).mro()[1].__dict__['__str__'].__get__(foo, type(foo)).__call__()
 "[1, 2, 'this is a particular list instance']"

>> 
>> Thanks
>>   Peer
>
>Isn't there anybody who has something to say about the issue?
>
Ultimately you have to go into the code of ceval.c and object.c and typeobject.c
etc to see what is really happening.

>I think it's not only a problem with inspect. It is aproblem about old 
>style classes vs. new style classes. It seems that the support for new 
>style classes is not complete (yet).
>
>Some more investigation shows that also the module "types" is not 
>universally usable. E.g. InstanceType is only usabel for instances of 
>old classes. How do I test for instances of new classes?

Not certain, but hasattr(inst, '__new__') might be close. And mnemonic ;-)

Regards,
Bengt Richter


From max2 at fisso.casa  Fri Apr  1 15:18:22 2005
From: max2 at fisso.casa (max(01)*)
Date: Fri, 01 Apr 2005 20:18:22 GMT
Subject: tkinter destroy()
In-Reply-To: <1112255241.819981.206500@o13g2000cwo.googlegroups.com>
References: <qda2e.1129991$35.42052766@news4.tin.it>
	<opsoef83ndrqur0o@eb.pragmadev>
	<Qye2e.1131601$35.42117550@news4.tin.it>
	<1112255241.819981.206500@o13g2000cwo.googlegroups.com>
Message-ID: <i0i3e.1153778$35.42716739@news4.tin.it>

> also the app seems to have too many variables and widgets defined as
> self objects.  That isn't necessary unless they will be used outside
> the method they were created in (which labels and buttons usually
> aren't), so all you are doing is using up more memory than necessary.
> 

you are right, and at the end of this post you will find a new version 
of my code which heeds to your suggestion.

but i think there are exceptions.

consider for example building a BitmapImage for successive use in a 
widget, such as:

     self.immagine_1a = PhotoImage()
     self.immagine_1a.configure(
       file = "terra.gif"
       )

     self.e1 = Label(self.quadro_grande)
     self.e1.configure(
       image = self.immagine_1a,
       bd = 1,
       relief = SUNKEN
       )

if we follow your advice we should do:

     immagine_1a = PhotoImage()
     ....

instead, but it doesn't work. why?

> And just a matter
> of personal taste, but splitting up widget configuration over many
> lines for me impedes readiblity and makes the code look like java or
> c++ : surely not what we want?
> 

i thought about it. i prefer not to have lines longer than the usual 80 
char display, since (in my opinion) this produces an even more 
unreadable code layout. but we are starting a holy war i think...

> Also your three state
> variables could be members of a list, so you don't have to have
> separate constructors for each of them.
> 

it's true. but the drawback is that you have to keep an explicit 
mappping between names and variables; and what's worst is that this 
mapping must be known by the function that displays the second windows, 
and this is against data hiding.

if you are so kind as to peek at the attached code, you'll see that i 
also have restructured that part as one class. i'd like to hear your 
opinion about that. (now the code for the second window in completely 
reusable, i guess)

> Anyway here's a version of your app that makes use of a 'for' statement
> to draw the labels and checkbuttons, so it's only half as long as your
> original app.  It also does the right thing - the key pont you were
> missing was to use a 'textvariable' argument in defining your label
> widgets in the 2nd window.

... and to use eval()


>         massimo = len(max(self.testo)) + 2

better:   massimo = max(map(len, self.testo)) + 2

....

anyway, here it is. bye!

----

from Tkinter import *

class MiaApp:
   def __init__(self, genitore):

     fonte = ("Helvetica", 12)

     quadro_grande = Frame(genitore)
     quadro_grande.pack(expand = YES, fill = BOTH)

     msg = Label(quadro_grande)
     msg.configure(
       font = fonte,
       wraplength = "10c",
       justify = LEFT,
       text = u"Sono qui sotto presentati tre pulsanti a spunta. \
Premendo un pulsante, se ne varia lo stato di selezione e si \
imposta una variabile a un valore che indica lo stato del \
pulsante stesso. Premendo il pulsante \u00ABMostra \
Variabili\u00BB si possono vedere i valori correnti delle \
variabili."
       )
     msg.pack(side = TOP)

     pulsanti = Frame(quadro_grande)
     pulsanti.pack(side = BOTTOM, fill = X, padx = "2m")

     pulsanti_spunta = Frame(quadro_grande)
     pulsanti_spunta.pack(side = TOP, fill = X, padx = "2m")

     chiudi = Button(pulsanti)
     chiudi.configure(text = "Chiudi", command = genitore.destroy)
     chiudi.pack(side = LEFT, expand = YES)

     self.var = Button(pulsanti)
     self.var.configure(
       text = "Mostra Variabili",
       command = self.pulsanteMostraVariabiliPremuto,
       default = NORMAL
       )
     self.var.pack(side = LEFT, expand = YES)

     self.tergicristalli = IntVar()
     ps1 = Checkbutton(pulsanti_spunta)
     ps1.configure(
       text = "Tergicristalli a posto",
       variable = self.tergicristalli,
       relief = FLAT
       )
     ps1.pack(side = TOP, pady = 2, anchor = W)

     self.freni = IntVar()
     ps2 = Checkbutton(pulsanti_spunta)
     ps2.configure(
       text = "Freni a posto",
       variable = self.freni,
       relief = FLAT
       )
     ps2.pack(side = TOP, pady = 2, anchor = W)

     self.autista = IntVar()
     ps3 = Checkbutton(pulsanti_spunta)
     ps3.configure(
       text = "Autista sobrio",
       variable = self.autista,
       relief = FLAT
       )
     ps3.pack(side = TOP, pady = 2, anchor = W)

   def pulsanteMostraVariabiliPremuto(self):
     if self.var.cget("state") == ACTIVE:
       self.var.configure(state = DISABLED)
       mv = MostraVariabili(
	self,
	"tergicristalli",
	"freni",
	"autista"
	)

class MostraVariabili(Toplevel):
   def __init__(self, chiamante, *variabili):

     Toplevel.__init__(self)

     self.mioChiamante = chiamante

     fonteVar = ("Helvetica", 14)

     self.wm_title("Valori delle variabili")

     quadro_grande = Frame(self)
     quadro_grande.pack(expand = YES, fill = BOTH)

     titolo = Label(quadro_grande)
     titolo.configure(
       text = "Valori delle variabili:",
       width = 20,
       font = fonteVar
       )
     titolo.pack(side = TOP, fill = X)

     lung = max(map(len, variabili))

     dq = {}
     dn = {}
     dv = {}
     for i in variabili:
       dq[i] = Frame(quadro_grande)
       dq[i].pack(side = TOP, anchor = W, fill = X)

       dn[i] = Label(dq[i])
       dn[i].configure(
	text = i + ": ",
	width = lung + 2,
	anchor = W
	)
       dn[i].pack(side = LEFT)

       dv[i] = Label(dq[i])
       dv[i].configure(
	textvariable = eval("self.mioChiamante." + i),
	anchor = W
	)
       dv[i].pack(side = LEFT, expand = YES, fill = X)

     vaBene = Button(quadro_grande)
     vaBene.configure(
       text = "Va Bene",
       command = self.pulsanteVaBenePremuto,
       default = ACTIVE
       )
     vaBene.bind("<Return>", self.pulsanteVaBenePremuto_a)
     vaBene.focus_force()
     vaBene.pack(side = BOTTOM, pady = 2)

   def pulsanteVaBenePremuto(self):
     self.destroy()
     self.mioChiamante.var.configure(state = NORMAL)

   def pulsanteVaBenePremuto_a(self, evento):
     self.pulsanteVaBenePremuto()

radice = Tk()
radice.wm_title("Dimostrazione Pulsanti a Spunta")
radice.wm_iconname("spunta")
miaApp = MiaApp(radice)
radice.mainloop()


From liyangdal at 163.com  Wed Apr 27 03:39:19 2005
From: liyangdal at 163.com (yang)
Date: Wed, 27 Apr 2005 15:39:19 +0800
Subject: about Frame.__init__(self)
Message-ID: <d4ng5i$j9k$1@mail.cn99.com>

I just a newbie of python
Now I found that almost every program use Tkinter have this line

class xxx(xxx):
     """xxxxx"""

     def __init__(self):
         """xxxxx"""

         Frame.__init__(self)
         .....................
         .......


the line "Frame.__init__(self)" puzzle me.
why use it like this?
can some one explain it?
regards,
yang


From gus at sonic.net  Sat Apr 16 00:07:28 2005
From: gus at sonic.net (Bob Alman)
Date: Sat, 16 Apr 2005 04:07:28 GMT
Subject: Do You Want To Know For Sure That You Are Going To Heaven? The
	reason some people don't know for sure if they are going to
	Heaven when they die is because they just don't know. The
	good news is that you can know for sure that you are going to
	Heaven which is described in the Holy Bible as a beautiful
	place with no death, sorrow, sickness or pain. (newsgroup-post 140)
References: <1113613608.511723.298610@o13g2000cwo.googlegroups.com>
	<901161dqkqtr2gkhf3qb4j6mvecgb8ivuf@4ax.com>
Message-ID: <4c08e.14898$m31.141648@typhoon.sonic.net>

In rec.music.makers.guitar.acoustic Grossi wrote:
> Nuf said.

Why don't you go there now?

-- 
Bob Alman


From n00m at narod.ru  Tue Apr 26 15:39:12 2005
From: n00m at narod.ru (n00m)
Date: 26 Apr 2005 12:39:12 -0700
Subject: Sniffing at two sockets
Message-ID: <1114544352.333580.173050@o13g2000cwo.googlegroups.com>

In a simple VB script I open ADODB.Connection and start sending
some very simple T-SQL commands to a MS SQL Server. Like this:

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

Set cn = CreateObject("ADODB.Connection")
cn.Open _
"Provider=sqloledb;Data Source=127.0.0.1,1434;" & _
"Network Library=DBMSSOCN;Initial Catalog=pubs;" & _
"User ID=qwe;Password=asdasd;"

cn.Execute _
"select 'XXXXXXXXXXXX';" & _
"waitfor delay '00:00:03'; raiserror ('AAA',10,1) with nowait;" & _
"waitfor delay '00:00:03'; raiserror ('BBB',10,1) with nowait;" & _
"waitfor delay '00:00:03'; raiserror ('CCC',10,1) with nowait;" & _
"waitfor delay '00:00:03'; select 'YYYYYYYYYYYY';"

------------------------------------------------------------
BUT I do it (sending to\fro data) via two sockets opened in a python
code. Note: in above connection string I direct VB script to port 1434,
BUT the SQL Server listens to its default port = 1433.
Here my python code:
------------------------------------------------------------

import socket
host, port = '127.0.0.1', 1434
s1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s2.connect((host, 1433))
s1.bind((host, port))
s1.listen(1)
cn, addr = s1.accept()
while 1:
    data = cn.recv(4096)
    if not data: break
    s2.send(data)
    print 'VB_SCRIPT:', data
    data = s2.recv(4096)
    if not data: break
    cn.send(data)
    print 'SQL_SERVER:', data
cn.close()
s1.close()
s2.close()

------------------------------------------------------------
And in the 0-approximation everything works just fine! I can
see printed intercepted requests\replies from VBS\SQLServer.
BUT alas it does not work EXACTLY as it works if the VB script
"connects" DIRECTLY to the "true" SQL Server's port = 1433.

After receiving the first error_message 'AAA' the VBS should
immediately issue something like 'Ready to receive next packet'
(in my newbish understanding), BUT instead it gets frozen till
its CommandTimeout times out and only then it wakes up, issues
a final request and gets ALL data that SQL Server "accumulated"
for the client's side; namely, error_messages 'BBB' and 'CCC'
and result of "select 'YYYYYYYYYYYY'".

ANY IDEAS WHY IT WORKS NOT QUITE CORRECTLY WILL BE GREATLY
APPRECIATED!!!



From steve at holdenweb.com  Thu Apr 28 10:47:22 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 28 Apr 2005 10:47:22 -0400
Subject: dynamically generating temporary files through python/cgi
In-Reply-To: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
References: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
Message-ID: <d4qsn6$up9$1@sea.gmane.org>

poisondart wrote:
> Is there a way to dynamically generate temporary files (such as an
> html, xml or text file) in Python?
> 
> I'm not sure if I'm explaining myself clearly as I've no clue how to
> describe this mechanism. I've seen it on certain websites that will
> generate a file under certain parameters (through forms) that will
> dissapear (i.e. delete itself) after a specified amount of time. These
> files usually have some phony string for their filenames...like it's
> been md5 hashed or something.
> 
> Is there a group of library functions that allow this? I imagine that
> if i manually go and allocate a bunch of timers to monitor files, it
> would be really expensive in load. Or perhaps is this a client-side
> mechanism?
> 
> Thanks,
> - poisondart
> 
Typically such functionality would be provided by having the server 
periodically run a task to delete files from the temporary directory 
whose age exceeds a given value.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From martin.witte at gmail.com  Wed Apr 27 14:06:12 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 27 Apr 2005 11:06:12 -0700
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
Message-ID: <1114625172.700855.263140@l41g2000cwc.googlegroups.com>

What you want I guess is to read first all lines of the file into a
string as you did, and then let the split method split it based on
newlines only - see example below.

Then you use split again to put all elements of one line into another
list - split it on commas.

Now you can define sortfunctions for all columns you want to sort, e.g.
like below - and use those to compare elements. You get a script like:
-#!/usr/bin/env python
-
-def cmp_index(a, b, ndx):
-   if a[ndx] < b[ndx]:
-        return -1
-    elif a[ndx] > b[ndx]:
-       return 1
-    else:
-        return 0
-
-def cmp_0(a, b):
-    return cmp_index(a, b, 0)
-
-def cmp_1(a, b):
-    return cmp_index(a, b, 1)
-
-s = 'Kikker en Eend,Max Veldhuis\nDikkie Dik,Jet Boeke\nRuminations on
C++,Andrew Koenig & Barbara Moo'
-s = s.split('\n')
-l = []
-for i in s:
-    l.append(i.split(','))
-
-l.sort(cmp_0)
-print l
-l.sort(cmp_1)
-print l

with output like:
martin at ubuntu:~ $ ./test.py
[['Dikkie Dik', 'Jet Boeke'], ['Kikker en Eend', 'Max Veldhuis'],
['Ruminations on C++', 'Andrew Koenig & Barbara Moo']]
[['Ruminations on C++', 'Andrew Koenig & Barbara Moo'], ['Dikkie Dik',
'Jet Boeke'], ['Kikker en Eend', 'Max Veldhuis']]
martin at ubuntu:~ $



From mwm at mired.org  Thu Apr 21 01:50:00 2005
From: mwm at mired.org (Mike Meyer)
Date: Thu, 21 Apr 2005 00:50:00 -0500
Subject: Embedding & Extending Python &other scripting languages
References: <tommy.nordgren-8162EF.06201721042005@amstwist00.chello.com>
Message-ID: <86d5sou19z.fsf@guru.mired.org>

Tommy Nordgren <tommy.nordgren at chello.se> writes:

> I'm interested in doing a rather ambitious project concerning compiler
> construction tools. 
> My tools will parse specification files containing for example lalr
> parser specifications.
> The specifications will contain embedded semantic actions which i want to
> allow writing in any object-oriented language.
> The specifications will name a scripting language and a target language 
> module . Then my tool will create an embedded interpreter for the 
> scripting language, which will load a target language module written in 
> the scripting language, and use it to generate code in the target 
> language.
>
> I want to provide my system as open source.
>
> Now my basic problem is how to find what scripting languages are 
> installed on a users system, and generate the necessary makefiles 
> automatically. I will be using swig for interface creation.
> I want to support at least perl and python, with target language support 
> for at least java and c++ initially.

Ouch. Nasty problem. You can find out what scripting languages are
installed on a Unixish system by doing "which <name>" in a shell
script. "<name>" varies depending on the language in question. I.e.:

guru% which python
/usr/opt/bin/python
guru% which ruby
/usr/opt/bin/ruby
guru% which perl
/usr/opt/bin/perl
guru% which tclsh
/usr/opt/bin/tclsh

for python, ruby, perl and tcl.

For Windows, you can probably grovel similar information out of the
Registry. I'll leave details up to someone unfortunate enough to have
to work with Windows.

FWIW, you probably ought to verify that java and C++ are installed as
well. End-users systems - specifically Windows, but some Linux/Unix
distributions don't include either.

Finally, checking just that just interpreter exists may not be
sufficient for all Unix-like systems. Some systems, for various
nonsensical reasons, split packages up into two halves. One half will
install the interpreter, and the other half will install the include
files and etc. that you need to build extensions. You may need those
as well.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From raghulj at gmail.com  Tue Apr  5 10:40:53 2005
From: raghulj at gmail.com (Raghul)
Date: 5 Apr 2005 07:40:53 -0700
Subject: authentication in zope server & Python
Message-ID: <1112712052.977243.307630@o13g2000cwo.googlegroups.com>

Hi
   I am trying to execute a sample python script using zope server.The
problem is I need to execute a python script in the linux machine. When
I call that function through the zope server,It shows me the error
regarding authentication that is 'access denied for myfunction'

   In my function just I am copying a file from one location to another
location in the same machine.

Thanx in advance



From ahmedt at gmail.com  Wed Apr 20 14:52:18 2005
From: ahmedt at gmail.com (ATSkyWalker)
Date: 20 Apr 2005 11:52:18 -0700
Subject: What's the difference between these 2 statements?
Message-ID: <70c4ec00.0504201052.30227e93@posting.google.com>

What's the difference between these 2 statements?

If you have a String s="12345"

s[len(s)::-1] = "54321"

But

s[len(s):0:-1] = "5432"

Why? What's the difference? What number then can I use as the end of
the slice if I were to supply all 3 parameters?


Thanks,
AT


From qwweeeit at yahoo.it  Wed Apr 13 11:38:30 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 13 Apr 2005 08:38:30 -0700
Subject: Removing comments... tokenize error
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
Message-ID: <2ab23d7a.0504130738.622a3605@posting.google.com>

Thanks! If you answer to my posts one more time I could  consider you as 
my tutor...

It was strange to have found a bug...! In any case I will not go deeper 
into the matter, because for me it's enough your explanatiom.
I corrected the problem by hand removing the tokens spanning multiple lines
(there were only 8 cases...).

Instead I haven't understood your hint about comments...
I succeded  in realizing a python script which removes comments.

Here it is (in all its cumbersome and criptic appearence!...):
    
# removeCommentsTok.py   
import tokenize
Input = "pippo1"    
Output = "pippo2"    
f = open(Input)
fOut=open(Output,"w")

nLastLine=0
for i in tokenize.generate_tokens(f.readline): 
.   if i[0]==52 and nLastLine != (i[2])[0]:
.   .   fOut.write((i[4].replace(i[1],'')).rstrip()+'\n')
.   .   nLastLine=(i[2])[0]
.   elif i[0]==4 and nLastLine != (i[2])[0]:
.   .   fOut.write((i[4]))
.   .   nLastLine=(i[2])[0]
f.close()
fOut.close()

Some explanations for the guys like me...:
- 52 and 4 are the arbitrary codes for comments and NEWLINE respectively
- the comment removing is obtained by clearing the comment (i[1]) in the 
  input line (i[4])
- I also right trimmed the line to get rid off the remaining blanks.


From reinhold-birkenfeld-nospam at wolke7.net  Wed Apr 20 10:53:53 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Wed, 20 Apr 2005 16:53:53 +0200
Subject: goto statement
In-Reply-To: <42666097.3040405@i.com.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
Message-ID: <3cn8o1F6ppkc3U4@individual.net>

Maxim Kasimov wrote:

>   uuuuf..., i don't requesting that "goto" was available in next versions of python,
>   but i'm saying if it will be so, it will be easy and quickly _debug_ some skripts,
>   _not only_ for commenting

If you want, you can always use the goto module.

Reinhold, no, I will not tell you where to find it


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 05:58:23 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 10:58:23 +0100
Subject: numarray.array can be VERY slow
In-Reply-To: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
References: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
Message-ID: <d3iqej$mq3$1@scotsman.ed.ac.uk>

Edward C. Jones wrote:
> Steven Bethard wrote:
> 
>  > As mentioned, this has nothing to do with numarray, and everything to
>  > do with your inexplicable use of lists.  Why don't you just write this
>  > as:
>  >
>  > arr = numarray.ones((8, 8, 256, 256), Float64)
> 
> The code I posted was simplified from a larger program which I have now 
> revised. But I still ask: why did it take 4.3 seconds to run?

Is the simple answer not that repeated use of array.append is 
inefficient as python has to repeatedly re-allocate memory for the array?

I had a similar problem as I ran a simulation and appended the results 
to a results set. Now I create a list of objects of the size required 
and the overwrite them. Much faster :)

Jim
Getting in there late cos I've been skiving


From lee_merrill at yahoo.com  Thu Apr  7 10:46:24 2005
From: lee_merrill at yahoo.com (lee_merrill at yahoo.com)
Date: 7 Apr 2005 07:46:24 -0700
Subject: struct enhancements?
Message-ID: <1112885184.815268.265560@l41g2000cwc.googlegroups.com>

Hi everyone,

I would like to be able to pack/unpack 8-byte longs, and have strings
with null padding to be able to have the nulls trimmed off
automatically.

Just thought I would mention these two items on my wish list, since I
searched a bit, and haven't yet found a mention of this...

Regards,
Lee



From tjreedy at udel.edu  Fri Apr  1 12:50:39 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 1 Apr 2005 12:50:39 -0500
Subject: dictionary: sorting the values preserving the order
References: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
Message-ID: <d2k1iq$l78$1@sea.gmane.org>


"Rakesh" <rakesh_usenet at yahoo.com> wrote in message 
news:1112337653.401206.160510 at l41g2000cwc.googlegroups.com...
> This gets a list sorted by the keys.

That is all you *can* get (with the list keys being the dict values).

> How would I get a revised dictionary sorted by its values.

You can't.  A dictionary is not sorted.  The print order is arbitrary and 
not controllable.

Terry J. Reedy





From rpmuller at gmail.com  Thu Apr  7 00:42:10 2005
From: rpmuller at gmail.com (RickMuller)
Date: 6 Apr 2005 21:42:10 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <Wr15e.5248$7b.3507@trndny06>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<6p1951pop1pfh3j57r7gg568cn3bo4c7lg@4ax.com>
	<Wr15e.5248$7b.3507@trndny06>
Message-ID: <1112848930.618770.97030@l41g2000cwc.googlegroups.com>

>> 3. Of what practical use (or even esoteric academic interest) is the
>> parity of the number of interchanges?

>I presume the goal is academic, determining whether a >permutation is
a member of
>the alternating group of even permutations (A4, A5, ...).  For >some
problems,
>that is a useful invariant.  For instance, iirc, the parity
>determines whether a
>given 15 puzzle arrangement is solvable.

To tell whether a wave function corresponds to bosons or fermions.



From m at m.com  Thu Apr 28 14:09:17 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 02:09:17 +0800
Subject: why "import wx" doesn't work?
Message-ID: <427126ca$1_3@rain.i-cable.com>

I just learn to make a blank windows frame with python and wxpython. I found
the statment "import wx" cannot work as the original "from wxPython.wx
import *". I see in the readme file of wxpython that if I install it as the
default one, I can use "import wx" instead of the long one. What is wrong?
The code pasted below:

import wx   # the default is "from wxPython.wx import *", I change it and it
just can't work.

class MyApp(wxApp):
    def OnInit(self):
        frame = wxFrame(NULL, -1, "Hello from wxPython")
        frame.Show(true)
        self.SetTopWindow(frame)
        return true

app = MyApp(0)
app.MainLoop()




From steven.bethard at gmail.com  Thu Apr  7 12:23:09 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 07 Apr 2005 10:23:09 -0600
Subject: Multiple inheritance: Interface problem workaround,
 please comment this
In-Reply-To: <slrnd5am6f.7ed.axel@m2.sine>
References: <slrnd5am6f.7ed.axel@m2.sine>
Message-ID: <ybCdnTBdnr30w8jfRVn-pQ@comcast.com>

Axel Straschil wrote:
> I solved all my problems for pythons multiple inheritance with this ng,
> thaks to all again, but there is one think I still dislike:
> 
> class A(object):
> 	def __init__(self, a=None, **__eat): 
> 		print "A"
> 		super(A, self).__init__()
> class B(object):
> 
> 	def __init__(self, b=None, **__eat): 
> 		print "B"
> 		super(B, self).__init__()
> 
> class AB(A, B):
> 	def __init__(self, a=None, b=None): 
> 		super(AB, self).__init__(a=a, b=b)
> 
> ab = AB()
> 
[snip]
>  
> My problem: If you make a coding mistake, and the mistake does not give
> a runtime error becouse **__eat is a hungry evil beast, it would be very
> hard to debug ... think of a wrong written parameter!

I also agree that this style is not pretty.  What are A and B in your 
real code?  I would suggest that rather than this architecture, you 
might do better to either:
    (1) make A or B a mixin class that doesn't need __init__ called, or
    (2) make class AB inherit from A and delegate to B (or vice versa)
For example:

py> class A(object):
...     def __init__(self, x):
...         self.x = x
...
py> class B(object):
...     def __init__(self, y):
...         self.y = y
...
py> class C(object):
...     def m(self):
...         return self.x, self.y
...
py> class ABC(A, C):
...     def __init__(self, x, y):
...         super(ABC, self).__init__(x)
...         self._b = B(y)
...     def __getattr__(self, name):
...         return getattr(self._b, name)
...
py> a = ABC(1, 2)
py> a.x
1
py> a.y
2
py> a.m()
(1, 2)

Note that A is the "true" superclass, B is delegated to, and C is just a 
mixin class.

STeVe


From martin at v.loewis.de  Thu Apr 21 15:32:12 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 21 Apr 2005 21:32:12 +0200
Subject: Array of Chars to String
In-Reply-To: <4267e35a.161797031@news.oz.net>
References: <mailman.2133.1113942800.1799.python-list@python.org>
	<42673B51.4040804@v.loewis.de> <4267e35a.161797031@news.oz.net>
Message-ID: <4267ffbd$0$10455$9b622d9e@news.freenet.de>

Bengt Richter wrote:
> But since I'm playing the other side of the table for
> the moment, isn't filter to be deprecated?

How could we know? It might be removed in P3k, but does that
mean it is deprecated, as in "being disapproved", i.e. "being
passed unfavorable judgement on"?

In Python, I consider something deprecated when the documentation
says it is deprecated, or when using it raises a DeprecationWarning.
Neither is the case for filter.

That it is going to be removed in P3k does not bother me much:
I wouldn't be suprised if Python 3000 is released 995 years from
now :-)

Regards,
Martin


From duncan.booth at invalid.invalid  Wed Apr 20 12:16:33 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Apr 2005 16:16:33 GMT
Subject: logging to two files
References: <d45rvr$rrm$1@news.uit.no>
Message-ID: <Xns963EAFBC7317duncanrcpcouk@127.0.0.1>

Tor Erik S?nvisen wrote:

> Hi
> 
> Have the following code:
> import logging
> 
>         logging.basicConfig(level = logging.DEBUG,
>                             format = '[%(levelname)-8s %(asctime)s] 
> %(message)s',
>                             filename = 'rfs.log',
>                             filemode = 'w')
> 
> When using logging.(debug, info etc) stuff is logged to rfs.log.
> How may I specify another log with different charateristics, such as a 
> different file
> 
> regards 
> 
> 
You have to not use basicConfig if you want multiple handlers. Instead set 
up the configuration explicitly.

Here is some code I used recently which you can use as a base. It isn't 
logging to two files, instead it logs to a file and the console.

# Initialise logging
def setupLogging():
    SCRIPT = os.path.splitext(os.path.basename(sys.argv[0]))[0]
    SECTNAME = 'logging-'+SCRIPT
    if not configuration.has_section(SECTNAME):
        SECTNAME = 'logging'
    
    options = configuration.options(SECTNAME)
    if 'level' in options:
        loglevel = configuration.get(SECTNAME, 'level')
    else:
        loglevel = 'NOTSET'

    if 'console' in options:
        consolelevel = configuration.get(SECTNAME, 'console')
    else:
        consolelevel = ''

    if isinstance(loglevel, basestring):
        loglevel = logging._levelNames[loglevel.upper()]

    if 'format' in options:
        logformat = configuration.get(SECTNAME, 'format')
    else:
        logformat = '%(asctime)s %(levelname)s %(message)s'

    if 'filename' in options:
        logfile = configuration.get(SECTNAME, 'filename')
    else:
        logfile='errors.log'

    if 'filemode' in options:
        logmode = configuration.get(SECTNAME, 'filemode')
    else:
        logmode = 'a'

    if isinstance(consolelevel, basestring):
        clevel = logging._levelNames[consolelevel.upper()]
    else:
        clevel = consolelevel

    handler = logging.FileHandler(logfile, "a")
    fmt = logging.Formatter(logformat, "%Y-%m-%d %H:%M:%S")
    handler.setFormatter(fmt)
    handler.setLevel(loglevel)
    logging.root.addHandler(handler)
    
    if consolelevel:
        console = logging.StreamHandler()
        formatter = logging.Formatter('%(levelname)-8s %(message)s')
        console.setFormatter(formatter)
        console.setLevel(clevel)
        logging.root.addHandler(console)

    logging.root.setLevel(min(loglevel, clevel))
    

The configuration file contains a section such as:

[logging]
level=warning
filename=output\%(script)s.log
console=info



From kent37 at tds.net  Mon Apr 18 08:25:24 2005
From: kent37 at tds.net (Kent Johnson)
Date: Mon, 18 Apr 2005 08:25:24 -0400
Subject: Can a function be called within a function ?
In-Reply-To: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
References: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>
Message-ID: <4263a2fd$1_3@newspeer2.tds.net>

Peter Moscatt wrote:
> Is it possible to write code and allow a function to be called within
> another like I have shown below ?

Yes, of course. In fact you do it six times in the code below, to call open(), readline(), append(), 
close(), main() and populatelist().

Kent

> 
> Pete
> 
> 
> 
> def populatelist():
>         f=open(_globals.appath + "dxcluster.svr","r")
>         while true:
>                 text = f.readline()
>                 if text =="":
>                         break
>                 _list.append(string.strip(text))        
>         f.close()
>         
>         
> def serversettings():
>         servers.main(root)
>         if _globals.refresh=="yes":
>                 populatelist()   <----------------------- calling function above.
> 
> 


From mahs at telcopartners.com  Fri Apr  8 15:14:19 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 08 Apr 2005 12:14:19 -0700
Subject: curious problem with large numbers - Due to subprocess
In-Reply-To: <4256c65c$1@nntp0.pdx.net>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>	<mailman.1517.1112938969.1799.python-list@python.org>	<4256a676@nntp0.pdx.net>
	<4256b80b.34130777@news.oz.net>	<4256b774$1@nntp0.pdx.net>
	<4256c65c$1@nntp0.pdx.net>
Message-ID: <d36l0o$gsk$1@sea.gmane.org>

Scott David Daniels wrote:
> Scott David Daniels wrote:
> 
>> Bengt Richter wrote:
>>
>>>> Aha! Same version (2.3.4):
>>>>
>>>> Idle:
>>>>    >>> 1e10000
>>>>    1.0
>>>>    >>> import struct; struct.pack('d', 1e10000)
>>>>    '\x00\x00\x00\x00\x00\x00\xf0?'
>>>> (which is actually 1.0)
>>>>
>>>> python via command line (readline support):
>>>>    >>> 1e10000
>>>>    1.#INF
>>>>    >>> import struct; struct.pack('d', 1e10000)
>>>>    '\x00\x00\x00\x00\x00\x00\xf0\x7f'
>>>>
>>>> Same results (command line vs. Idle) for 2.4.1.
> 
> 
> On Python 2.2.3: (#42, Jun  4 2003, 10:33:42)
> IDLE 0.8 -- press F1 for help
> 
>>>> 1e1000
> 
> 1.#INF
> 
> So, sometime after that.
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org
> 
Problem is associated with executing iteractive input in a subprocess.

 >python idle.py -n

IDLE 1.1      ==== No Subprocess ====
 >>> 1e10000
1.#INF
 >>>

Michael




From andreif at mail.dntis.ro  Sat Apr 23 07:08:28 2005
From: andreif at mail.dntis.ro (Stormbringer)
Date: 23 Apr 2005 04:08:28 -0700
Subject: tracing function calls
In-Reply-To: <mailman.2342.1114247256.1799.python-list@python.org>
References: <1114245537.919546.254320@f14g2000cwb.googlegroups.com>
	<mailman.2342.1114247256.1799.python-list@python.org>
Message-ID: <1114254507.976792.149110@z14g2000cwz.googlegroups.com>

Thank you Fredrik !
With a little tweaking for the right indentation it should prove useful
:)

Fredrik Lundh wrote:
> "Stormbringer" wrote:
>
> > I've been wondering if there is a mechanism similar to
trace/untrace
> > found in lisp, for example call trace(function-name) and whenever
this
> > function is called it will show its parameters to stdout ....
>
> def trace(func):
>     def tracer(*args, **kwargs):
>         print func.__name__, args, kwargs
>         result = func(*args, **kwargs)
>         print func.__name__, "return", result
>         return result
>     return tracer
>
> def myfunc(a, b, c):
>     return a + b + c
>
> myfunc = trace(myfunc)
> 
> myfunc(1, 2, 3)
> 
> (tweak as necessary)
> 
> </F>



From bill.mill at gmail.com  Wed Apr  6 10:11:26 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 6 Apr 2005 10:11:26 -0400
Subject: shebang in cross platform scripts
In-Reply-To: <d30om0$lb4$1@solaris.cc.vt.edu>
References: <d30om0$lb4$1@solaris.cc.vt.edu>
Message-ID: <797fe3d4050406071168d2b33a@mail.gmail.com>

On Apr 6, 2005 9:37 AM, rbt <rbt at athop1.ath.vt.edu> wrote:
> 
> Haven't tested this on Windows yet... thought I'd ask here:
> 
> Does the line below have any negative impact on Windows machines? I
> develop and test mostly on Unix, but my scripts are often used on Win
> systems too.
> 
> #!/usr/bin/env python

What the others have said already is true, that it will be ignored on
windows, with one caveat. The shebang is interpreted by Apache if your
script is a CGI script. So, if your script is a CGI, you will need to
have a windows version and a nix version.

Peace
Bill Mill
bill.mill at gmail.com


From percivall at gmail.com  Mon Apr 18 16:17:18 2005
From: percivall at gmail.com (Simon Percivall)
Date: 18 Apr 2005 13:17:18 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
Message-ID: <1113855438.245983.78740@l41g2000cwc.googlegroups.com>

You can always unpack a tuple that way, like in:

.>>> import sys
.>>> for (index, (key, value)) in enumerate(sys.modules.iteritems()):
pass



From steve at holdenweb.com  Fri Apr  8 12:45:17 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 12:45:17 -0400
Subject: Can dictionary values access their keys?
In-Reply-To: <d3682h$qom$1@vegh.ks.cc.utah.edu>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
Message-ID: <d36c9p$jkm$1@sea.gmane.org>

Matthew Thorley wrote:
> This may be a very rudimentary question, but here goes:
> 
> If I have a simple dictionary, where the value is a class or function,
> is there an interface through which it can discover what its key is?
> Similar to index() for list.
> 
No, because mapping types (of which dict is the canonical example) don;t 
guarantee uniqueness of values. In other words, there can be several 
keys mapping to the same value.

You would therefore need to know how to handle such cases - would you 
want to return an arbitrary one of those keys, or a list of them all?

A standard dict doesn't keep any record of the order in which keys were 
added, so there are some things you *can't* do, like return "the first 
key added with a given value".

> For a list, assuming I new what the parent list was I could do something
> like this.
> 
> 
>>>>class child:
> 
> ...     def get_parent_index(self, parent):
> ...             return parent.index(self)
> ...
> 
>>>>a = child()
>>>>l = [a]
>>>>b = l[0]
>>>>b.get_parent_index(a)
>>>>b.get_parent_index(l)
> 
> 0
> 
> Is there a way to do something like that with dicts?
> 
So you know about the .index() and .find() methods, and of course since 
there is no guarantee that a value appears only once in the list they 
disambiguate by returning the lowest index containing the value.

A simple way to do what you appear to want would be:

     def get_parent_index(self, parent):
         for k, v in parent.items():
             if v == self:
                 return k

This would return None if the required item wasn't found in the dict parent.
> 
> On a similar note, if one object is part of another, is there a way for
> the 'child' obj to discover what/who the 'parent' object is? That way
> parent does not have to be explicityly passed to get_parent_index?
> 
This is like asking if you can find the "name" of an object. The fact is 
that a single object can be bound to many variables. Suppose I write:

     lst = [1, 2, 3]

does that mean that the "name" of 2 is lst[1]? No - 2 is just a value 
that happens to be bound to that list element (among other things).

If I then write

     otherlst = lst
     otherlst[1' = "two"

you will find that lst[1] is also now bound to "two" because lst and 
otherlst are in fact references tot he same list object, so changing one 
also changes the other. Given that, what is the "name" of that list?

> The idea is like this:
> 
> 
>>>>class child:
> 
> ...     def get_parent_index(self):
> 		parent = self.magic_parent_discovery()
> ...             return parent.index(self)
> ...
> 

Given a set of objects and a known attribute or set of attributes for 
those objects that might be references to a specific search target you 
can perform the magic you want, but a generic search for "any reference 
to the search target", while not impossible (using Python's excellent 
introspection facilities) is way beyond what most people would consider 
practical. Obviously the garbage collector has to solve this problem, 
but you *really* don't want to be doing this stuff in Python unless you 
absolutely *must*.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fredrik at pythonware.com  Mon Apr 11 09:11:47 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 15:11:47 +0200
Subject: How does Python call the system/primitive calls ?
References: <60bb954105041105047b0213e3@mail.gmail.com>
Message-ID: <d3dst4$qoh$1@sea.gmane.org>

James Yu wrote:

> I am trying to learn the way Python invokes system or primitive calls.
> I tried to locate the function in Python's source that handles such
> requests, but I found it's like picking a needle in ocean.

what "system or primitive calls"?  Python's OS-level modules usually rely on the
nderlying C runtime libraries...  (e.g. os.rename() calls rename() which does what-
ever it needs to do to implement rename() semantics according to POSIX, etc.)

</F> 





From whocaresrmb at yahoo.com  Sat Apr  9 15:16:52 2005
From: whocaresrmb at yahoo.com (Soy Bomb)
Date: 9 Apr 2005 12:16:52 -0700
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60_=28newsgroup-post_127=29?=
In-Reply-To: <E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
Message-ID: <1113074212.618866.24620@f14g2000cwb.googlegroups.com>

"The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ. "

Sounds like the USA 2005.



From greg at cosc.canterbury.ac.nz  Tue Apr 19 02:03:16 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Tue, 19 Apr 2005 18:03:16 +1200
Subject: Inelegant
In-Reply-To: <425e2fa5.350189245@news.oz.net>
References: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>
	<mailman.1879.1113463795.1799.python-list@python.org>
	<425e2fa5.350189245@news.oz.net>
Message-ID: <3cjl9iF6lk0raU1@individual.net>

Bengt Richter wrote:

> I never liked any of the solutions that demand bracketing the string with expression brackets,
> but I just had an idea ;-)

Or for an even more twisted idea:


   from textwrap import dedent

   class _Dedent(type):

     def __new__(cls, name, bases, dict):
       if name  == "*": # for bootstrapping
         return type.__new__(cls, name, bases, dict)
       return dedent(dict['__doc__'])

   DedentedString = _Dedent("*", (), {})

   #
   #   Usage example
   #

   class foo(DedentedString):
     """
     This is a dedented (or perhaps demented?) string.
     It spans multiple lines.
     """

   print type(foo)
   print foo

The output is:

   <type 'str'>

   This is a dedented (or perhaps demented?) string.
   It spans multiple lines.


-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From dccarson at gmail.com  Mon Apr 11 15:03:01 2005
From: dccarson at gmail.com (dccarson at gmail.com)
Date: 11 Apr 2005 12:03:01 -0700
Subject: smtplib does not send to all recipients
In-Reply-To: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
Message-ID: <1113246181.843652.158520@o13g2000cwo.googlegroups.com>

I changed debuglevel to 1 and looked at the response on the recipient
names.  They are BOTH accepted, but still only my id (d123456) receives
the e-mail.  The long id (d1234567890) never gets the e-mail.  Here is
the excerpt of the exchange.

send: 'mail FROM:<d123456 at myDomainHere.com> size=160\r\n'
reply: '250 2.1.0 <d123456 at myDomainHere.com>... Sender ok\r\n'
reply: retcode (250); Msg: 2.1.0 <d132456 at myDomainHere.com>... Sender
ok
send: 'rcpt TO:<d123456>\r\n'
reply: '250 2.1.5 <d123456>... Recipient ok\r\n'
reply: retcode (250); Msg: 2.1.5 <d123456>... Recipient ok
send: 'rcpt TO:<d1234567890>\r\n'
reply: '250 2.1.5 <d1234567890>... Recipient ok\r\n'
reply: retcode (250); Msg: 2.1.5 <d1234567890>... Recipient ok



From elbertlev at hotmail.com  Mon Apr 11 18:16:13 2005
From: elbertlev at hotmail.com (elbertlev at hotmail.com)
Date: 11 Apr 2005 15:16:13 -0700
Subject: Dialogic bindings
Message-ID: <1113257773.898521.266190@z14g2000cwz.googlegroups.com>

Hi!

Does somebody have bindings to Dialogic voice cards driver. I'm sure
some people do have them, but could not find any reference. Ideally
there sould be some framework for CT applications in Python.

Any help would be greatly appreciated.



From peufeu at free.fr  Tue Apr 12 13:53:11 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Tue, 12 Apr 2005 19:53:11 +0200
Subject: HELP ! Anybody knows where the stackless python website is ?
References: <opsmekm2ei6yt6e7@news.cisco.com>
	<42164d01$0$4676$9b622d9e@news.freenet.de>
	<d5uxzk7q.fsf@python.net> <42185D66.1020203@v.loewis.de>
	<op.so19tmaeqfv3if@localhost>
	<1113315342.809621.14220@l41g2000cwc.googlegroups.com>
Message-ID: <op.so4ryxfdqfv3if@localhost>


	Great !
	Thanks !

On Tue, 12 Apr 2005 16:15:42 +0200, cfbolz <cfbolz at gmx.de> wrote:

> Hi!
>
> Pierre-Fr?d?ric Caillaud wrote:
>> I've been trying desperately to access http://www.stackless.com but
>> it's been down, for about a week now !
>
> The stackless webpage is working again.
>
> Regards,
>
> Carl Friedrich Bolz
>



From modelnine at ceosg.de  Sun Apr  3 10:10:05 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sun, 3 Apr 2005 16:10:05 +0200
Subject: Python Cookbook
Message-ID: <200504031610.08428.modelnine@ceosg.de>

Hi all!

I've received my copy of the Python Cookbook two days ago, and just thought 
that I might independently commend all you editors and recipe designers out 
there to an excellent book! I've thoroughly enjoyed reading the introductions 
in each chapter, and although I've been programming in Python for four years 
now, I've seen quite a few idioms that are new for me as well.

The book is pretty much just like this newsgroup: surprises me each and every 
time again how many smart people's comments are contained within. :-)

Keep up the good work! And thanks Alex for making the second edition possible!

-- 
--- Heiko.
listening to: Wir Sind Helden - Ruessel an Schwanz
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From suryaprakashg at gmail.com  Thu Apr  7 20:30:19 2005
From: suryaprakashg at gmail.com (suryaprakashg at gmail.com)
Date: 7 Apr 2005 17:30:19 -0700
Subject: extending event class in wxpython
Message-ID: <1112920219.864227.10980@f14g2000cwb.googlegroups.com>

Hi all,

 I have a sub-classed wxtreectrl but i want to create an event when a
node is added to my class . But i dont seem to understand how to do
that. I want to create my own NODE_ADDED event which would be handled
by main frame which creates an instance of my treectrl.

Any help would be greatly appreciated , as always.



From viznut at charter.net  Fri Apr 22 23:20:22 2005
From: viznut at charter.net (Randall Hopper)
Date: Fri, 22 Apr 2005 22:20:22 -0500
Subject: Python callbacks & PyGILState_Release()
Message-ID: <20050423032022.GA32169@charter.net>

     What is the correct way to propagate exceptions from Python callbacks?

     When I do this:

     Python -> C++ -> Python Callback

(example attached) an exception raised in the callback doesn't make it back
across C++ to Python.

     It appears that PyGILState_Release() at the bottom of the callback
wrapper is resetting the error state (as I can set a global based on
PyErr_Occurred() there, and can catch that up in the exception handler in
Python).

     This obviously isn't correct.  What should I be doing?

Thanks,

Randall


------------------------------------------------------------------------------
void callback_wrapper( void *user_data )
{
  // Acquire interpreter lock
  PyGILState_STATE gstate = PyGILState_Ensure();
  ...
  // Call Python
  pyresult = PyEval_CallObject( pyfunc, pyargs );
  ...
  /*********** At this point, PyErr_Occurred() is true   **************/
  /****** But it's not true when we return through C++ to Python  ******/

  // Free interpreter lock
  PyGILState_Release(gstate);
}

void registerCallback( PyObject *pyfunc )
{
  ...
  // Ensure threads inited, so we can use Ensure/Release in callbacks
  PyEval_InitThreads();

  // Ref pyfunc
  Py_INCREF( pyfunc );

  // Call underlying C++ method, registering the above C++ callback
  realRegisterCallback( callback_wrapper, pyfunc );
}


From theller at python.net  Thu Apr 14 15:16:29 2005
From: theller at python.net (Thomas Heller)
Date: Thu, 14 Apr 2005 21:16:29 +0200
Subject: distribute python script
References: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>
	<vPmdnUKBSeVrIcPfRVn-1Q@comcast.com>
	<1113505210.693247.143930@z14g2000cwz.googlegroups.com>
Message-ID: <fyxtw4mq.fsf@python.net>

"codecraig" <codecraig at gmail.com> writes:

> sure....i posted another thread eariler, which explains much more
> related to py2exe..check that out and let me know if that helps.
>
> http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/4071921987be308d

I'm monitoring this group, but I hope you understand the I cannot spend
too much time to debug each problem reported.

A very common problem with py2exe has to do with encodings (google for
"EncodingsAgain", and you will find a wiki page explaining this), but
this is pure speculation.

Thomas


From kent37 at tds.net  Fri Apr 29 08:20:04 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 29 Apr 2005 08:20:04 -0400
Subject: OOP
In-Reply-To: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <42722203$1_1@newspeer2.tds.net>

demon_slayer2839 at yahoo.com wrote:
> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.
> 

You might be interested in this essay which gives some motivation for simple use of classes:
http://www.pycs.net/users/0000323/stories/15.html

Kent


From mauriceling at acm.org  Thu Apr 28 19:49:44 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 29 Apr 2005 09:49:44 +1000
Subject: Python site-packages and import
References: <ced73313.0504281516.41b23879@posting.google.com>
Message-ID: <d4rsqn$lpc$1@domitilla.aioe.org>

Peter Saffrey wrote:
> I'm trying to write a python service, with an executable in
> /usr/local/bin, but modules that are kept in a sub-directory of
> /usr/lib/python/site-packages.
> 
> Using apt-proxy as my template, I've put the modules in
> /usr/lib/python/site-packages/mymodules and tried to import them with
> import mymodules.module1. However, this doesn't seem to be working,
> even though something very similar works for apt-proxy. I thought this
> might be something to do with sys.path, but I can't work out why it's
> different for my modules and those used by apt-proxy.
> 
> To be fair, it is past midnight, and I'm probably just being stupid.
> Would anybody care to point out where? :)
> 
> Peter

your site-packages directory must be seen in python. try

import sys
sys.path

and see if your site-packages directory is listed?

maurice


From reinhold-birkenfeld-nospam at wolke7.net  Thu Apr 21 06:49:38 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Thu, 21 Apr 2005 12:49:38 +0200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <slrnd6f0bu.ge8.apardon@rcpc42.vub.ac.be>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
	<mailman.2204.1114033804.1799.python-list@python.org>
	<slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>
	<3cpc8oF6n6g9bU1@individual.net>
	<slrnd6f0bu.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <3cpeu5F64gp32U1@individual.net>

Antoon Pardon wrote:
> Op 2005-04-21, Reinhold Birkenfeld schreef <reinhold-birkenfeld-nospam at wolke7.net>:
>> Antoon Pardon wrote:
>>
>>> I sometimes think python should have been more explicite here,
>>> using a marker for the start-index and end-index, may '^' and
>>> '$'. So if you wanted the last element you had to write:
>>> 
>>>   lst[$]
>>> 
>>> And for the next to last element:
>>> 
>>>   lst[$ - 1]
>>> 
>>> 
>>> This would make accessing list elements counted from the rear
>>> almost just as easy as it is now but wouldn't interfere with
>>> the ask forgiveness programming style.
>>
>> How would you pass this argument to __getitem__?
> 
> Well assuming lst.last, was the last index of lst, __getitem__
> would get lst.last and lst.last - 1 passed.

Then it would be an alias for len(lst)-1 ?

>> What would be allowed, only '$-x' or also '$+x' or what else?
> 
> Any expression where an int is allowed.

Okay.

>> What type would '$' be?
> 
> It would be an int.

Where would it be allowed? Only in subscriptions?

Reinhold


From roy at panix.com  Fri Apr  1 18:25:27 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 01 Apr 2005 18:25:27 -0500
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca>
Message-ID: <roy-6B6440.18252701042005@reader1.panix.com>

Peter Hansen <peter at engcorp.com> wrote:
> unittest can really be rather light.  Most of our
> test cases are variations on the following, with
> primarily application-specific code added rather than
> boilerplate or other unittest-related stuff:
> 
> import unittest
> 
> class TestCase(unittest.TestCase):
>      def test01(self):
>          '''some test....'''
>          self.assertEquals(a, b)

Well, right there the "extra" stuff you needed to do (vs. py.test) was 
import unittest, inherit from it, and do "self.assertEquals" instead of 
just plain assert.  But (see below), that's not the big thing that attracts 
me to py.test.

> I'm a little puzzled why folks so often consider this
> particularly "heavy".  No need to deal with suites,
> TestResult objects, etc, as others have suggested,
> unless you are trying to extend it in some special
> way.

In all but the most trivial project, you're going to have lots of tests.  
Typically, each class (or small set of closely related classes) will go in 
one source file, with a corresponding test file.  You'll probably have 
stuff scattered about a number of different directories too.  That means 
you need to build some infrastructure to find and run all those various 
tests.

One way would be futzing with suites (which I still haven't completely 
figured out).  Another way would be building a hierarchical series of 
dependencies in Make (or whatever build tool you use) to run your tests.  
The latter is what I usually do.  The idea that I can just type "python 
py.test" at the top level and have it find and run everything for me just 
blows me away convenience-wise.

I also like the idea that I just stick print statements into my tests and 
the output automagically goes away unless the test fails.  I'm a firm 
believer that unit tests should NOT PRODUCE ANY OUTPUT unless they fail.  
I'm working with a system now where the unit tests not only produce reams 
of output, but it's also rigged to keep going in the face of failure.  
Trying to find the actual error in the output is a nightmare.


From rabkin at mweb[DOT]co[DOT]za  Thu Apr  7 16:32:53 2005
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Thu, 07 Apr 2005 22:32:53 +0200
Subject: How to name Exceptions that aren't Errors
In-Reply-To: <3blfl8F6gt80jU1@individual.net>
References: <3blfl8F6gt80jU1@individual.net>
Message-ID: <_8-dnTyvubKUBMjfRVn-3Q@is.co.za>

Leo Breebaart wrote:
> I've recently become rather fond of using Exceptions in Python to
> signal special conditions that aren't errors, but which I feel
> are better communicated up the call stack via the exception
> mechanism than via e.g. return values.
> 

Ummm... yeah, I quite agree.

LOOK EVERYONE, it's Leo Breebart. This guys famous in the alternative 
universe of alt.fan.pratchett.

You are the same Leo Breebart, right?

Well done, APF9 is excellent. But what did we expect.

--Max


From ladasky at my-deja.com  Wed Apr 27 03:42:13 2005
From: ladasky at my-deja.com (ladasky at my-deja.com)
Date: 27 Apr 2005 00:42:13 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <mailman.2264.1114136477.1799.python-list@python.org>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
	<1114122554.228545.105700@g14g2000cwa.googlegroups.com>
	<d49g4a$onn$1@sea.gmane.org>
	<mailman.2264.1114136477.1799.python-list@python.org>
Message-ID: <1114587733.475284.119010@g14g2000cwa.googlegroups.com>

Michael Spencer wrote:
> It appears that if you want to deepcopy an object that may contain
arrays,
> you're going to have to 'roll your own' deep copier.  Something like
this
> would do it:

[method deleted]

Whew!  Michael, that was way more than I bargained for.  New issues for
me: the "**" notation, and the __repr__ method.  I'll have a look at
this -- but meanwhile, I converted my arrays over to lists.  My program
is now working.  Although it's a bit slower than it would be with
arrays, I'll live with the performance hit for now, because I can do
the deepcopy operation without further fuss.

> BTW: are you sure you really need to copy those arrays?

Yes, I do.  The arrays (now lists) contain the weights for a customized
neural net class that I wrote.  The process of evolving the neural nets
is to mutate copies of them.  I want to keep the original nets until
I'm sure I want to discard them, so copying is required.

--
Rainforest laid low.
"Wake up and smell the ozone,"
Says man with chainsaw.
John J. Ladasky Jr., Ph.D.



From mrmaple at gmail.com  Fri Apr 15 09:52:41 2005
From: mrmaple at gmail.com (James Carroll)
Date: Fri, 15 Apr 2005 09:52:41 -0400
Subject: Using python from a browser/security hole
In-Reply-To: <TkP7e.2472$VA3.2138@newssvr30.news.prodigy.com>
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
	<MPG.1cca20626fa9aeca98968a@news-server>
	<TkP7e.2472$VA3.2138@newssvr30.news.prodigy.com>
Message-ID: <b273c74105041506527155f010@mail.gmail.com>

I don't think Jython will help much here... you would have to embed
jython in your applet which makes it big, which makes it take longer
to download... (or you could install it ahead of time on each client.)

I asked my friend who did some smartcard authentication at a previous
job... and in his case the card had an LCD readout that gave a
different key every minute, and the user had to look at that number,
and type it in for access.   To automate this, with a card reader,
there could be a (barcoder-scanner-like) app on each client that would
emulate typing on the keyboard when the card was read.  The user would
have to click on a text field, then scan their card and the number
would show up automatically.  One step further... some javascript
could possibly get the keyboard events as long as the page had input
focus, and if it sees a smart-card key like sequence of keystrokes,
then submit a form from a hidden IFrame....

So, short of writing your own plug-in extension for each different
browser, I'm not sure you're going to be able to access the client
hardware from a client-side web page.  Either way (plug-in or java
applet with privileges) your user will have to agree to give access to
the hardware.

-Jim

On 4/15/05, Philippe C. Martin <philippe at philippecmartin.com> wrote:
> Neil,
> 
> Would Jpython let me do that ?
> Would java let me call an external Python script - which in turn would
> access my device ?
> 
> Thanks
> 
> Philippe
> 
> 
> Neil Hodgson wrote:
> 
> > Philippe:
> >
> >> Since I need to access a local/client device from the page and
> >> that I wish to be cross-platform; does that mean Java is my only
> >> way out ?
> >
> >    Java is designed to be safe and not allow access to client devices.
> > There is a mechanism where you can attempt to ask for permission from
> > Java but it looked complex to me and I doubt many browsers will
> > cooperate. They have often locked security down to prevent this sort of
> > access.
> >
> >    Neil
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
>


From jstroud at mbi.ucla.edu  Wed Apr 20 13:50:54 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 20 Apr 2005 10:50:54 -0700
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <200504201050.54062.jstroud@mbi.ucla.edu>

On Tuesday 19 April 2005 10:58 pm, seberino at spawar.navy.mil wrote:
> Many people I know ask why Python does slicing the way it does.....
>
> Can anyone /please/ give me a good defense/justification???

Here you go, no remembering "+1" or "-1". Also, see the hundreds of other 
times this topic has graced this list.

>>> i = 4
>>> str = "asdfjkl;"
>>> print str[:i]+str[i:]
asdfjkl;

James

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

http://www.jamesstroud.com/


From Sebastien.Boisgerault at gmail.com  Fri Apr 29 13:37:05 2005
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 29 Apr 2005 10:37:05 -0700
Subject: doctest's ELLIPSIS
In-Reply-To: <1114793929.180986.195870@o13g2000cwo.googlegroups.com>
References: <1114789524.038880.312510@g14g2000cwa.googlegroups.com>
	<1114790657.829547.59680@g14g2000cwa.googlegroups.com>
	<1114792468.495670.98150@z14g2000cwz.googlegroups.com>
	<1114793929.180986.195870@o13g2000cwo.googlegroups.com>
Message-ID: <1114796225.657174.147370@f14g2000cwb.googlegroups.com>

Done.



From jerf at jerf.org  Fri Apr  1 18:20:59 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 18:20:59 -0500
Subject: Help with splitting
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
	<d2kjtk$qda$1@eeyore.INS.cwru.edu>
Message-ID: <pan.2005.04.01.23.20.58.627197@jerf.org>

On Fri, 01 Apr 2005 18:01:49 -0500, Brian Beck wrote:
> py> from itertools import groupby
> py> [''.join(g) for k, g in groupby('  test ing ', lambda x: x.isspace())]
> ['  ', 'test', ' ', 'ing', ' ']
> 
> I tried replacing the lambda thing with an attrgetter, but apparently my 
> understanding of that isn't perfect... it groups by the identify of the 
> bound method instead of calling it...

Unfortunately, as you pointed out, it is slower:

python timeit.py -s 
"import re; x = 'a ab c' * 1000; whitespaceSplitter = re.compile('(\w+)')"

"whitespaceSplitter.split(x)" 

100 loops, best of 3: 9.47 msec per loop

python timeit.py -s
"from itertools import groupby; x = 'a ab c' * 1000;" 

"[''.join(g) for k, g in groupby(x, lambda y: y.isspace())]"

10 loops, best of 3: 65.8 msec per loop

(tried to break it up to be easier to read)

But I like yours much better theoretically. It's also a pretty good demo
of "groupby".


From seefeld at sympatico.ca  Mon Apr 11 13:50:14 2005
From: seefeld at sympatico.ca (Stefan Seefeld)
Date: Mon, 11 Apr 2005 13:50:14 -0400
Subject: Problem with import "from omniORB import CORBA, PortableServer"
In-Reply-To: <1113252859.024163.323710@g14g2000cwa.googlegroups.com>
References: <1113247809.688746.233970@z14g2000cwz.googlegroups.com>
	<mailman.1713.1113250441.1799.python-list@python.org>
	<1113252859.024163.323710@g14g2000cwa.googlegroups.com>
Message-ID: <425AB8D6.3000001@sympatico.ca>

gerald.maher at waytohere.com wrote:
> Thank for the reply, I think your right  my problem is the what version
> to us, I want to write some Python scripts calling Corba Objects what
> do i need ?
> 
> omnipython-1.5.2-1

this looks like *really* old (and obsolete) stuff...

> omniORBpy 2.5
> omniORB 4.0.5
> Python 2.4.1

These look fine. Make sure to either have a binary package for omniORBpy
that was compiled for the version of python you are actually using, or
alternatively compile it yourself.

HTH,
		Stefan


From pyguy2 at gmail.com  Wed Apr 13 09:00:24 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 13 Apr 2005 06:00:24 -0700
Subject: Is socket.shutdown(1) useless
Message-ID: <1113397224.402755.286570@o13g2000cwo.googlegroups.com>

Issues of socket programming can be wierd, so I'm looking for some
comments.

In my python books I find exclusive use of socket.close(). From my
other readings, I know about a "partial close operation". So, I figured
it would be useful to post some code about how socket.close() has an
implicit send in it and you can actually gain some clarity by being
more explicit with the partial close which means  splitting
socket.close() up into socket.shutdown(1) and socket.close().

And got a response in essence saying, why bother, socket.shutdown,
isn't useful.

Here is my thinking:

With a standard socket.close(), the client closes the socket
immediately after the implicit send. This means the client assumes it
was ok to actually close the socket, independant of how the server
reacts to that last bit of data. To me that is an assumption you may
not always want to make.

If, instead, the client does a socket.shutdown(1) to say it is done
sending, it can still recv and wait for the server to respond with
either:
1)yep, I agree you finished sending
or
2)I know you are done,and I got your data, but I do not think you are
done

To me these seem like a very useful distinction, since now if the
client cares, it can find out if it's final communication did matter.
It helps avoid what I call the princess bride phenomenon of #2:

"You keep using that word. I do not think it means what you think it
means."

So, is this whole business with socket.shutdown mostly useless? So
useless that I cannot find any mention of it in 2nd edition,
Programming Python. 

john



From roy at panix.com  Mon Apr 18 22:51:54 2005
From: roy at panix.com (Roy Smith)
Date: Mon, 18 Apr 2005 22:51:54 -0400
Subject: Wrapping C++ Class Heirachy in Python
References: <d419gb$r67$1@pump1.york.ac.uk>
	<d41aau$8o5$03$1@news.t-online.com> <umzrvo5zk.fsf@bigfoot.com>
Message-ID: <roy-607983.22515418042005@reader1.panix.com>

In article <umzrvo5zk.fsf at bigfoot.com>,
 Chris Smith <smitty_one_each at bigfoot.com> wrote:

> >>>>> Diez B Roggisch <deetsNOSPAM at web.de> writes:
> 
>     >> PyType_Ready but in Python the base class isn't recognised. Is
>     >> there anything obvious I'm missing?
> 
>     > Maybe - I'd go for one of the several available python wrapper
>     > generators. I personally had good experiences with SIP. But you
>     > might also try boost python or SWIG.
> 
>     > The python C-API is great - for C. For C++, use one of the
>     > above.  -- Regards,

I've been playing around with ctypes 
(http://starship.python.net/crew/theller/ctypes/) recently.  So far, it 
looks pretty cool.


From jepler at unpythonic.net  Tue Apr 26 11:58:22 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 26 Apr 2005 10:58:22 -0500
Subject: python equivalent of php implode
In-Reply-To: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
Message-ID: <20050426155819.GE7477@unpythonic.net>

It looks like php's implode(sep, seq) is like sep.join(seq) in Python.

But this is a lousy way to write database queries.  You should use the
Python's DB-API interface's execute(statement, parameters) instead.
Assuming that paramstyle is 'qmark', I think it ends up looking
something like this:

    items = query_param.items()
    keys = [item[0] for item in items]
    values = [item[1] for item in items]

    # If the query parameters or the table are under
    # user control you must take care to validate them
    assert table in permitted_tables
    for k in query_param.keys():
        assert k in permitted_keys

    sql = "INSERT INTO %s (%s) values %s" % (
        table, ", ".join(keys),
        ", ".join(["?"] * len(keys))
    )
    conn.execute(sql, values)

now you don't have to worry that you get the quoting of the values
absolutely right, since db-api does it for you.

Jeff
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From jrastrick at student.usyd.edu.au  Wed Apr  6 20:59:04 2005
From: jrastrick at student.usyd.edu.au (Jordan Rastrick)
Date: 6 Apr 2005 17:59:04 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <mf%4e.318$Xm3.61@trndny01>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
Message-ID: <1112835544.302702.294570@z14g2000cwz.googlegroups.com>

Unless I'm mistaken, this doesnt quite work, because it switches the
parity of phase every time a comparison is made, rather than every time
a swap is made. So:

# <untested>
phase = 1
def mycmp(x,y):
   global phase
   c = cmp(x,y)
   if c > 0: # i.e. a swap will be performed in the sort
       phase = -phase
   return c



From dan at dontspammecauseidontlikit.com  Wed Apr 13 21:02:17 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Thu, 14 Apr 2005 09:02:17 +0800
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
Message-ID: <m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>

On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
wrote:

> I'm just trying to help an artist acquaintance who needs (I just 
>learned) the first 3003 digits of pi to the base 12.

Now you've got me curious.  Why would an artist want the first 3003
digits of pi to the base 12?

Dan



From jason.mobarak at gmail.com  Wed Apr 27 17:10:58 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 27 Apr 2005 14:10:58 -0700
Subject: Lexicographical sort for numarray
In-Reply-To: <mailman.2601.1114635965.1799.python-list@python.org>
References: <uOSdnUooRt4OufLfRVn-sg@comcast.com>
	<1114635125.849049.309880@l41g2000cwc.googlegroups.com>
	<mailman.2601.1114635965.1799.python-list@python.org>
Message-ID: <1114636258.399427.181330@f14g2000cwb.googlegroups.com>

It does what the OPs example does, but with numeric types.



From codecraig at gmail.com  Tue Apr 19 10:39:29 2005
From: codecraig at gmail.com (codecraig)
Date: 19 Apr 2005 07:39:29 -0700
Subject: XML-RPC -- send file
Message-ID: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>

Hi,
  I want to use XML-RPC to send a file from client-to-server or from
server-to-client.  I know XML-RPC supports, int, string etc...not
objects.

  I thought i read somewhere that by using pickle or something, that u
could get a string representation of your object (or a file in my case)
and send that.  Any ideas?

thanks.



From jeremit0 at gmail.com  Fri Apr  8 16:59:28 2005
From: jeremit0 at gmail.com (jeremit0)
Date: Fri, 08 Apr 2005 16:59:28 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36n3h$n0s$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>	<78f6595afdb48aabb9c72dfe549a543e@upf.edu>	<d36mds$l3q$1@sea.gmane.org>
	<d36n3h$n0s$1@sea.gmane.org>
Message-ID: <d36r76$692$1@sea.gmane.org>

Steve Holden wrote:
> jeremit0 wrote:
> 
>> harold fellermann wrote:
>>
>>> file.readlines() returns a list of lines. You can either call find on 
>>> each
>>> element in this list, like:
>>>
>>> for line in myfile.readlines() :
>>>     if line.find('my particular string') :
>>>         do_something()
>>>
>> I had thought that may be the only way to do it, I was hoping for 
>> something simpler as I wrote earlier.
>> Thanks for your help,
>> Jeremy
>>
> If you want line numbers,. of course, then you can use
> 
>   for linenum, line in enumerate(myfile.readlines()):
>       ...
> 
> Remember that true to Python's philosophy numbering will start at zero.
> 
Is this any better than:

     lines = myfile.readlines()
     for linenum in xrange(len(lines)):
         # Do stuff with lines[linenum] ...


?

Thanks,
Jeremy



From dh47302 at yahoo.com  Sat Apr 16 09:06:07 2005
From: dh47302 at yahoo.com (Klaus Alexander Seistrup)
Date: Sat, 16 Apr 2005 13:06:07 +0000 (UTC)
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <slrnd623dv.3k0.klaus@main.szn.dk>

lucio.torre at gmail.com wrote:

> Some months ago i did a port of the Python2.3.2 interpreter to
> PalmOS.

Wow, this is just what I've been waiting for.  Meanwhile I've tried
to make do with Rexx for PalmOS, hehehe...

However, MLPY doesn't seem to work on my Tungsten T3 (PalmOS 5.2.1).
The .prc installs without any problems, and I can start the Python
interpreter, but nothing happens if I ring in a Python expression and
press return -- the prompt just "hangs" and never returns.

Any ideas?

-- 
Klaus Alexander Seistrup
Magnetic Ink, Copenhagen, Denmark
http://magnetic-ink.dk/


From steve at holdenweb.com  Wed Apr 20 13:12:58 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 20 Apr 2005 13:12:58 -0400
Subject: goto statement
In-Reply-To: <Mrv9e.882$l45.490@newssvr12.news.prodigy.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
	<42666097.3040405@i.com.ua>	<dqCdneECDr445vvfRVn-tA@powergate.ca>
	<Mrv9e.882$l45.490@newssvr12.news.prodigy.com>
Message-ID: <d462an$8f1$1@sea.gmane.org>

Philippe C. Martin wrote:
> I do not want to pollute the debate but:
> 
> -) I remember a software QA managanager responsible for "C" coding rules
> also not allowing us to use 'break', 'continue', or 'return' (in the middle
> of a function). 
> 
And I once worked (back in the 1970's) in a software shop where "because 
procedure calls are slow in PL/1" we had to write them so each procedure 
ended with a GOTO to a specific label variable. You would call these 
monstrosities in the following way:

     MyProcReturn = DoneIt;
     GOTO MyProc;
DoneIt:
     ...

Horrendous. I lasted about five months and then couldn't take the 
ignorance and idiocy any longer. They refused to believe that a 
recursive function could ever be useful in the real world (but then, if 
you only have a hammer ...)

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From ville at spammers.com  Tue Apr 19 02:41:07 2005
From: ville at spammers.com (Ville Vainio)
Date: 19 Apr 2005 09:41:07 +0300
Subject: Nokia to speak at Python-UK next week
References: <mailman.1909.1113491601.1799.python-list@python.org>
	<slrnd67hjt.lvd.nick@irishsea.home.craig-wood.com>
Message-ID: <du7zmvvgtfg.fsf@lehtori.cc.tut.fi>

>>>>> "Nick" == Nick Craig-Wood <nick at craig-wood.com> writes:

    Nick> Not entirely on topic, but does anyone know if there is a
    Nick> series 80 python?  Or if the series 60 python runs on a
    Nick> series 80 phone (eg communicator 9300/9500)?

Nope & nope. It would be easy-ish to get Python working on a console
level on 9300/9500 if there was access to the source code...

There's also an open source implementation of Python for UIQ (UI
toolkit used by SonyEricsson)

See

http://www.mobilewhack.com/programming/python/

-- 
Ville Vainio   http://tinyurl.com/2prnb


From vze4rx4y at verizon.net  Fri Apr  1 18:17:50 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 01 Apr 2005 23:17:50 GMT
Subject: Help with splitting
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
	<d2kjtk$qda$1@eeyore.INS.cwru.edu>
Message-ID: <yEk3e.2197$7b.436@trndny03>

[Brian Beck]>
> py> from itertools import groupby
> py> [''.join(g) for k, g in groupby('  test ing ', lambda x: x.isspace())]
> ['  ', 'test', ' ', 'ing', ' ']

Brilliant solution!

That leads to a better understanding of groupby as a tool for identifying
transitions without consuming them.


> I tried replacing the lambda thing with an attrgetter, but apparently my
> understanding of that isn't perfect... it groups by the identify of the
> bound method instead of calling it...

Right.
attrgetter gets but does not call.

If unicode isn't an issue, then the lambda can be removed:

>>> [''.join(g) for k, g in groupby('  test ing ', str.isspace)]
['  ', 'test', ' ', 'ing', ' ']



Raymond Hettinger




From xah at xahlee.org  Mon Apr 18 16:40:43 2005
From: xah at xahlee.org (Xah Lee)
Date: 18 Apr 2005 13:40:43 -0700
Subject: New Python regex Doc (was: Python documentation moronicities)
In-Reply-To: <mailman.1813.1113355346.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<mailman.1813.1113355346.1799.python-list@python.org>
Message-ID: <1113856843.023012.165500@l41g2000cwc.googlegroups.com>

i have rewrote the Python's re module documentation.
See it here for table of content page:
http://xahlee.org/perl-python/python_re-write/lib/module-re.html

The doc is broken into 4 sections:
* regex functions (node111.html)
* regex OOP (re-objects.html)
* matched objects (match-objects.html)
* regex syntax (re-syntax.html)

the regex syntax page i haven't edited, except the introductory first
paragraph. The other pages are completely rewritten for about 80%.

There are a couple fine points or 3 places in the original doc i can't
understand. They are noted as NOTE DOC WRITERS or NEED EXAMPLE HERE.

 Xah
 xah at xahlee.org
? http://xahlee.org/



From Bob_then at yahoo.com.au  Wed Apr 13 01:09:31 2005
From: Bob_then at yahoo.com.au (Bob Then)
Date: Wed, 13 Apr 2005 15:09:31 +1000
Subject: Global Variables
Message-ID: <425ca975$1@dnews.tpgi.com.au>

If I have a module File
which has some fucontions but I need  globals filename and path how can I
set them so I can change them because I tryed.

filename="log.txt"
path="/home/Bob/"

def change_filename():
   filename=raw_input()

def change_path():
   path=raw_input()

they don't change and without the declarations there not global.

Help Please




From jrastrick at student.usyd.edu.au  Tue Apr  5 03:35:51 2005
From: jrastrick at student.usyd.edu.au (Jordan Rastrick)
Date: 5 Apr 2005 00:35:51 -0700
Subject: the bugs that try men's souls
In-Reply-To: <e5063e96.0504032239.64bc8d25@posting.google.com>
References: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>
	<1112534521.797702.53630@l41g2000cwc.googlegroups.com>
	<e5063e96.0504032239.64bc8d25@posting.google.com>
Message-ID: <1112686551.214344.188260@g14g2000cwa.googlegroups.com>

Sean McIlroy wrote:
> <later>
> Wow again. I had a real "V8 moment" when I looked at your solution
> (smacking my forhead, groaning ruefully, etc). You were right: my
> intention was simply to hide the trivial cases from view; I
completely
> missed the fact that I was now testing for membership in a different
> set. I should have remembered that python "plays fair", and looked a
> little harder to find my mistake.
>
> Thanks again,
> Sean

You're most welcome, I'm glad the solution was the right one.

Its the kind of bug you can stare at mindlessly for hours without
spotting it, but which will often be reasonably transparent to someone
with a fresh perspective on the code.

I had a doozy myself the other night, writing a mergesort for python's
deque class (I can't believe it doesnt come with one!).... the method
would yield a queue with the right elements in it, but in a seemingly
arbitrary order.

Turns out, there was a > sign that needed to be a >= sign. GRRRRRRR.

I bet if I'd posted to this group it would have been spotted in about 3
seconds flat :)

- Jordan



From mwm at mired.org  Tue Apr 26 06:21:45 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 05:21:45 -0500
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
Message-ID: <8664y9n8hy.fsf@guru.mired.org>

"ajikoe at gmail.com" <ajikoe at gmail.com> writes:

> Hello,
>
> If I use os.remove(fileName), does it always assure that the code will
> move to the next code only if the fileName is deleted completely?

Hmm. The documdentation doesn't say. A quick test on FreeBSD shows
that if you don't have permission to remove the file, an exception is
raised. A second test shows that you get a the same exception if the
file doesn't exist.

Things in os tend to be tied tightly to the underlying platform. You
might want to test on your platform.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From giblfiz at gmail.com  Fri Apr 22 18:08:57 2005
From: giblfiz at gmail.com (giblfiz at gmail.com)
Date: 22 Apr 2005 15:08:57 -0700
Subject: A SOAPpy question... (Method Parameters)
Message-ID: <1114207737.476946.165410@l41g2000cwc.googlegroups.com>

I'm having difficulty sending out correctly named method parameters to
a php soap server that I am running using SOAPpy. Idealy I would like
to send XML that looks like this (which I cribbed from another client
that works just fine)


<SOAP-ENV:Body>
        <ns1:login xmlns:ns1="http://testuri.org">
                <user_auth>
                        <user_name xsi:type="xsd:string">
                                   hpottash
                        </user_name>

                        <password xsi:type="xsd:string">
                                  775fd0ac8dcdba0f307e8a2a474f9dce
                        </password>
                        <version xsi:type="xsd:string">
                                 .01
                        </version>
                </user_auth>
                <application_name xsi:type="xsd:string">
                        SoapTest
                </application_name>
        </ns1:login>
</SOAP-ENV:Body>


The closest I can come with SOAPpy is by running the following >>>
remote = SOAPpy.SOAPProxy("http://192.168.0.200/",
"http://testuri.org")
remote.login({"user_auth": {'user_name': 'theusername', 'password':
'thepassword', "version" : ".01"}, "application_name":"SoapTest"});

Which generates XML that looks like this:
<SOAP-ENV:Body>
        <ns1:login xmlns:ns1="http://testuri.org" SOAP-ENC:root="1">
                   <v1>
                        <application_name xsi:type="xsd:string">
                                          SoapTest
                        </application_name>
                        <user_auth>
                                <password xsi:type="xsd:string">
                                          thepassword
                                </password>
                                <user_name xsi:type="xsd:string">
                                           theusername
                                </user_name>
                                <version xsi:type="xsd:string">
                                         .01
                                </version>
                        </user_auth>
                </v1>
        </ns1:login>
</SOAP-ENV:Body>

I believe that the Server is unable to parse this correctly because of
the <v1> tag, but I don't know how to specify what the names of the
parameters that are passed to the method should be.

Any help would be deeply appreciated. 
-Harry



From fredrik at pythonware.com  Mon Apr 18 16:35:00 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 18 Apr 2005 22:35:00 +0200
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
Message-ID: <d415e1$mhd$1@sea.gmane.org>

"AdSR" <artur_spruce at yahoo.com> wrote:

> Small wonder since it looks like one of those language features
> that make committing atrocities an order of magnitude easier.

eh?

    def f((a, b)):
        ...

is short for

    def f(tmp):
        a, b = tmp
        ...

if you think this is an "atrocity", maybe programming isn't for you.

> Has anyone actually used it in real code?

yes.  grep the standard library for a number of typical use cases.

</F>



From mefjr75 at hotmail.com  Fri Apr 15 02:18:06 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 14 Apr 2005 23:18:06 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
Message-ID: <1113545886.372148.82420@z14g2000cwz.googlegroups.com>

Dick Moores wrote:
> Paul Rubin wrote at 18:20 4/13/2005:
> >Dick Moores <rdm at rcblue.com> writes:
> > > I need to figure out how to compute pi to base 12, to as many
digits
> > > as possible. I found this reference,
> > > <http://mathworld.wolfram.com/Base.html>, but I really don't
> > > understand it well enough. Could someone show me how to do what I
need?
> >
> >Using the GNU "bc" utility:
> >
> >   $ bc -l
> >   bc 1.06
> >   Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation,
Inc.
> >   This is free software with ABSOLUTELY NO WARRANTY.
> >   For details type `warranty'.
> >   scale = 3000    # number of output places wanted
> >   obase = 12      # output base
> >   print 4 * a(1)  # pi = 4*arctan(1)
>
> I don't believe GNU "bc" is available for Windows, is it?
>
> Thanks,
>
> Dick Moores
> rdm at rcblue.com
Nice collection of unix tools, Cygwin not needed.
http://unxutils.sourceforge.net/
hth,
M.E.Farmer



From bucknuggets at yahoo.com  Tue Apr 12 15:20:25 2005
From: bucknuggets at yahoo.com (Buck Nuggets)
Date: 12 Apr 2005 12:20:25 -0700
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
	<mailman.1684.1113228968.1799.python-list@python.org>
Message-ID: <1113333625.215786.198580@l41g2000cwc.googlegroups.com>

> In truth, although postgres has more features, MySQL is probably
> better for someone who is just starting to use databases to develop
> for: the chances are higher that anyone using their code will have
> MySQL than Postgres, and they aren't going to need the features
> that Postgresql has that MySQL doesn't.  IMO, this has changed
> since only a year or two ago, when MySQL didn't support foreign-key
> constraints.

mysql does deserve serious consideration now that it supports
transactions.  However, keep in mind:

1.  mysql doesn't support transactions - one of its io layers (innodb)
does.  If you're hoping to get your application hosted you will find
that most mysql installations don't support innodb.  And due to the
bugs in mysql, when you attempt to create a transaction-safe table in
mysql if innodb isn't available it will just silently create it in
myisam, and your transactions will be silently ignored.

2.  mysql is still missing quite a few database basics - views are the
most amazing omission, but the list also includes triggers and stored
procedures as well.  Although most of these features are included in
the new beta, they aren't yet available in production.

3.  mysql has an enormous number of non-standard features such as
comment formatting, how nulls work, concatenation operator, etc.  This
means that you'll learn non-standard sql, and most likely write
non-portable sql.

4.  additionally, mysql has a peculiar set of bugs - in which the
database will change your data and report no exception.  These bugs
were probably a reflection of mysql's marketing message that the
database should do nothing but persist data, and data quality was the
responsibility of the application.  This self-serving message appears
to have been dropped now that they are catching up with other products,
but there's a legacy of cruft that still remains.  Examples of these
errors include:  silent truncation of strings to fit max varchar
length, allows invalid dates, truncation of numeric data to fit max
numeric values, etc.

5.  cost: mysql isn't expensive, but it isn't free either.  Whether or
not you get to use it for free depends on how you interpret their
licensing info and faq.  MySQL's recommendation if you're confused (and
many are) is to license the product or call one of their reps.

Bottomline - mysql has a lot of marketshare, is improving, and I'm sure
that it'll eventually be a credible product.  But right now it's has a
wide range of inexcusable problems.

More info at http://sql-info.de/mysql/gotchas.html

buck



From raoul.daruwala at gmail.com  Tue Apr 26 14:52:26 2005
From: raoul.daruwala at gmail.com (raoul)
Date: 26 Apr 2005 11:52:26 -0700
Subject: Do I need a nested lambda to do this?
In-Reply-To: <mailman.2494.1114479396.1799.python-list@python.org>
References: <1114472061.732832.283540@l41g2000cwc.googlegroups.com>
	<200504260127.42614.james@wrong.nu>
	<mailman.2494.1114479396.1799.python-list@python.org>
Message-ID: <1114541546.311072.204680@z14g2000cwz.googlegroups.com>

very nice bill. thanks all.



From jjl at pobox.com  Fri Apr 22 16:32:16 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 20:32:16 +0000
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<116iir4hq8muc62@corp.supernews.com>
	<200504222027.40280.james@wrong.nu>
	<mailman.2302.1114198274.1799.python-list@python.org>
Message-ID: <87sm1ilfhr.fsf@pobox.com>

Shane Hathaway <shane at hathawaymix.org> writes:
> R. C. James Harlow wrote:
[...]
> That situation is about to change: Qt 4 for Windows will be available
> under the GPL.
> 
> http://www.trolltech.com/newsroom/announcements/00000192.html
> 
> However, I haven't heard whether PyQt for Qt 4 will also be available
> under the GPL.

Yes, PyQt will be available under the same license as Qt.

The only thing left for people to gripe about post-Qt 4 is that it's
not BSD-licensed: you have to pay when you write non-free (free as in
speech) software.


John


From roy at panix.com  Fri Apr  1 20:26:50 2005
From: roy at panix.com (Roy Smith)
Date: Fri, 01 Apr 2005 20:26:50 -0500
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
Message-ID: <roy-9D39C9.20265001042005@reader1.panix.com>

In article <_4-dnaRR8dv8dNDfRVn-tg at powergate.ca>,
 Peter Hansen <peter at engcorp.com> wrote:

> As for Roy's comments: I use a small internally
> developed driver script which uses os.walk to find
> all the files matching tests/*_unit.py or tests/story*.py
> in all subfolders of the project, and which runs them
> in separate processes to ensure none can pollute
> the environment in which other tests run.  I can
> dispense with the unittest.main() call, but I like
> to be able to run the tests standalone.  I guess
> with py.test I couldn't do that...

Actually, I believe it does.  I'm just starting to play with this, but it 
looks like you can do:

py.test test_sample.py

and it'll run a single test file.  I imagine you could use your os.walk 
fixture in combination with this to run each test in its own process if you 
wanted to.


From claird at lairds.us  Tue Apr 26 15:08:02 2005
From: claird at lairds.us (Cameron Laird)
Date: Tue, 26 Apr 2005 19:08:02 GMT
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
	<xImdnW33JJiov_DfRVn-iw@powergate.ca>
	<d4j91s$bfp$1@solaris.cc.vt.edu>
Message-ID: <tsd2k2-ed4.ln1@lairds.us>

In article <d4j91s$bfp$1 at solaris.cc.vt.edu>,
rbt  <rbt at athop1.ath.vt.edu> wrote:
			.
			.
			.
>OK, I'm done seeking to provoke. So, it's official. Perl has *much*, 
>*much* better support for dealing with PDF files than does Python. 
			.
			.
			.
No, it's not; maybe Perl even has *worse* support.  At the very least,
there's more redundancy in what Perl offers.

I understand that <URL: http://cpan.uwinnipeg.ca/search?query=pdf&mode=dist >
looks rather convincing; in fact, a couple of years ago, we argued <URL:
http://www.unixreview.com/documents/s=7822/ur0304g/ > that indeed Perl was
ahead.  I'm not sure that's true now.  

Rather than wander into all the details, let's start over:  what kinds of
things do you think you want to do with PDFs?  You might be surprised to
find that, despite all that CPAN *seems* to offer, your needs aren't met
at all.  Or maybe they are.  It depends.  Let's get specific.


From greg_miller at nexpress.com  Fri Apr 15 11:09:05 2005
From: greg_miller at nexpress.com (greg_miller at nexpress.com)
Date: 15 Apr 2005 08:09:05 -0700
Subject: mySQL values not updating after query
Message-ID: <1113577745.655703.22120@l41g2000cwc.googlegroups.com>

I have an application that I am trying to add mySQL to.  I can connect
to the server with no problems and get a couple values from a table the
first time the page loads, ( a wxPython GUI app ), after changing the
table values from a mySQL shell I refresh the page and the values don't
update unless I do a connect and reconnect to the db in the function
that I am calling.  I don't think I am caching the values, I am using
python 2.4 and mysql 4.1.1.  I would like to create one connection that
can be used by all the python files I have created, or at least create
one connection per file and use that connection in different functions
within that file.

                   Greg Miller



From wpower at zeta.org.au.nospamplease  Sun Apr  3 22:46:54 2005
From: wpower at zeta.org.au.nospamplease (David Trudgett)
Date: Mon, 04 Apr 2005 12:46:54 +1000
Subject: Silly question re: 'for i in sys.stdin'?
References: <mailman.1276.1112581375.1799.python-list@python.org>
Message-ID: <m3sm278di9.fsf@rr.trudgett>


I'm not a Python expert by any means, but you're describing the
classic symptoms of buffering. There is a '-u' command line switch for
python to turn off buffering but that does not affect file iterators. 
See http://www.hmug.org/man/1/python.html for instance.

Tom Eastman <tom at cs.otago.ac.nz> writes:

> I'm not new to Python, but I didn't realise that sys.stdin could be called
> as an iterator, very cool!
>
> However, when I use the following idiom:
>
>    for line in sys.stdin:
>        doSomethingWith(line)

Guess what the suggested work-around on the man page was? Use
sys.stdin.readline() in a "while 1:" loop, as you have below:

>
>    while True:
>       line = sys.stdin.readline()
>       if line == '': break
>       doSomethingWith(line)

David

-- 

David Trudgett
http://www.zeta.org.au/~wpower/

Reality is 20% real and 80% made up stuff in your head.
But I'm not sure about the 20%.


From shane at hathawaymix.org  Mon Apr 18 01:08:00 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Sun, 17 Apr 2005 23:08:00 -0600
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <Pine.A41.4.61b.0504171403540.232474@dante76.u.washington.edu>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>	<cf052f0d.0504162206.129ccdbd@posting.google.com>
	<Pine.A41.4.61b.0504171403540.232474@dante76.u.washington.edu>
Message-ID: <426340B0.50307@hathawaymix.org>

Brian Sabbey wrote:
> Maybe using '**' would be better than '...' since it already is used to
> indicate keyword arguments.  Example:
> 
> class C(object):
>     x = property(**):
>        doc = "I'm the 'x' property."
>        def fget(self):
>           return self.__x
>        def fset(self, value):
>           self.__x = value
>        def fdel(self):
>           del self.__x

Looks good to me.  You should update the pre-PEP and submit it again to
the list.

This syntax might also be a good replacement for event handling when
lambda goes away (as Guido announced in his PyCon 2005 keynote.)

    button = Button(self, "Push me")
    button.addHandlers(**):
        def onmouseover(event):
            self.textBox.setText("Are you going to push me?")
        def onmouseout(event):
            self.textBox.setText("Too shy.  Goodbye.")
        def onclick(event):
            self.textBox.setText("Ouch!")
        oncontextmenu = self.oncontextmenu

Shane


From jjl at pobox.com  Fri Apr 29 15:31:12 2005
From: jjl at pobox.com (John J. Lee)
Date: 29 Apr 2005 20:31:12 +0100
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
	<42710531.6060006@freemail.gr>
Message-ID: <hdhppegv.fsf@pobox.com>

jfj <jfj at freemail.gr> writes:
[...]
> /* small program in C in self extracting archive
>   */
> if (have_application ("Python")) {
>    have_python:
>    system ("python.exe my_application.py")
> } else {
>    printf ("This software requires python. Wait until all the
> necessary components are being installed\n");
>    download_python_from_python_org();
>    system ("install_python.exe");
>    goto have_python;
> }
> 
> 
> Seriously, people who want executables wouldn't notice the difference.

Until they install the next program that does this.


John



From Domenique.Tilleuil at gmail.com  Wed Apr 20 17:01:38 2005
From: Domenique.Tilleuil at gmail.com (Domenique.Tilleuil at gmail.com)
Date: 20 Apr 2005 14:01:38 -0700
Subject: pyGTK on Mouse over event ?
In-Reply-To: <4266baf3$0$7208$626a14ce@news.free.fr>
References: <1114022408.677746.287630@f14g2000cwb.googlegroups.com>
	<4266af16$0$31058$626a14ce@news.free.fr>
	<1114027819.338892.278590@z14g2000cwz.googlegroups.com>
	<4266baf3$0$7208$626a14ce@news.free.fr>
Message-ID: <1114029300.082094.293410@g14g2000cwa.googlegroups.com>

def __init__(self):
    xml = gtk.glade.XML("/home/domenique/project1.glade")
    self.window = xml.get_widget("window1")
    self.img = xml.get_widget("image1")
    self.img.set_from_file("./test.svg")
    self.img.show()
    self.img.add_events(gtk.gdk.BUTTON_MOTION_MASK)
    xml.signal_autoconnect({
	'on_window1_delete_event': self.on_window1_delete_event,
	'on_window1_destroy_event': self.on_window1_destroy_event,
	'on_image1_motion_notify_event': self.on_image1_motion_notify_event,
	'on_image1_button_press_event': self.img_key_press,
    })

This is the code so far. i've added the MOTION MASK to the image
widget, is that what u ment ?



From fredrik at pythonware.com  Sun Apr 10 07:18:01 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 10 Apr 2005 13:18:01 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com><mailman.1603.1113027761.1799.python-list@python.org>
	<1113121254.874488.111250@f14g2000cwb.googlegroups.com>
Message-ID: <d3b1rt$vtm$1@sea.gmane.org>

Kay Schluehr wrote:

> I fear that Python 3.0 becomes some kind of vaporware in the Python
> community that paralyzes all redesign efforts on the std-lib.

that, combined with the old observation that CPython developers,
when given a choice, prefer to write C code over Python code, is
making the standard library a lot less useful than it could be.

(if you look at recent releases, most standard lib additions are things
that are fun for language tinkerers and people looking for many ways
to write simple algorithms, but very little stuff that's useful for
scripters
and application builders.  a C implementation of _bisect.  hello?)

if I were in charge, I'd separate 90% of the standard library from the
core distribution, made sure it ran on multiple implementions (at least
the two latest CPython implementations, plus what's needed to make
as much as possible available on the latest Jython and IronPython
releases), bundled a number of carefully selected external libraries
(without forcing developers to give up rights and loose control over
maintenance), refactor the test suite so it could be used both to test
the library and to see what parts worked properly on your platform,
and make new releases (for testers and early adopters) available
regularily.

</F>





From __peter__ at web.de  Mon Apr 25 08:15:33 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 25 Apr 2005 14:15:33 +0200
Subject: Squezing in replacements into strings
References: <mailman.2446.1114430162.1799.python-list@python.org>
Message-ID: <d4in0e$d7s$03$1@news.t-online.com>

Peter Bengtsson wrote:

> I've got a regular expression that finds certain words from a longer
> string.
>>From "Peter Bengtsson PETER, or PeTeR" it finds: 'Peter','PETER','PeTeR'.

> The problem is when there are more than one matches. The match.start() and
> match.end() are for the original string but after the first iteration in
> the loop the original string changes (it gains 2 characters in length due
to the "_"'s

> How can I do this this concatenation correctly?

I think sub() is more appropriate than finditer() for your problem, e. g.:

>>> def process(match):
...     return "_%s_" % match.group(1).title()
...
>>> re.compile("(peter)", re.I).sub(process, "Peter Bengtsson PETER, or
PeTeR")
'_Peter_ Bengtsson _Peter_, or _Peter_'
>>>

Peter


From paschott at no.yahoo.spamm.com  Thu Apr 28 19:34:31 2005
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Thu, 28 Apr 2005 23:34:31 GMT
Subject: Best way to parse file into db-type layout?
Message-ID: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>

I've got a file that seems to come across more like a dictionary from what I can
tell.  Something like the following format:

###,1,val_1,2,val_2,3,val_3,5,val_5,10,val_10
###,1,val_1,2,val_2,3,val_3,5,val_5,11,val_11,25,val_25,967,val_967

In other words, different layouts (defined mostly by what is in val_1, val_2,
val_3).

The ,#, fields indicate what "field" from our mainframe the corresponding value
represents.

Is there a good way to parse this into a DB-type format where I only pull out
the values corresponding to the appropriate field numbers?  Seems like
converting to a dictionary of some sort would be best, but I don't quite know
how I would go about that.

In this case, the first field is a value unto itself - represents a "letter
type" that would be associated with the rest of the record.  The fields are
either present or not, no placeholder if there's no value for e.g. Field #4.

Thanks for any help or pointers you can give me.

-Pete


From caleb1 at telkomsa.net  Fri Apr 29 15:37:48 2005
From: caleb1 at telkomsa.net (Caleb Hattingh)
Date: Fri, 29 Apr 2005 21:37:48 +0200
Subject: large dictionary creation takes a LOT of time.
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
	<d4tbib$cb9$1@news.tsystems.kiev.ua>
	<427255b4$1_3@newspeer2.tds.net>
Message-ID: <opsp0d5amk1js0xs@news.telkomsa.net>

In fact, as one of the Peter's (either Otten or Hansen) explained to me,

for line in open(file):

is actually both faster (being buffered) and generally better for very  
large files because it doesn't read the whole file into memory, like  
readlines does (if you have a memory limitation).

On Fri, 29 Apr 2005 12:00:37 -0400, Kent Johnson <kent37 at tds.net> wrote:

> Maksim Kasimov wrote:
>> Kent Johnson wrote:
>>  > for line in open(path):
>> the line of your example raise another question: opened file will be  
>> read at once time, as method readlines() do, or it will be read line by  
>> line as method readline() do.
>
> It will be read line by line as readline() does.
>
>> as far i know, it is depends on implementation of method "__iter__" of  
>> the object that "open()" returns, so another question: where i can find  
>> such an information (about how does such a functions works)?
>
> http://docs.python.org/lib/built-in-funcs.html
> http://docs.python.org/lib/bltin-file-objects.html
>
> Kent



From bokr at oz.net  Thu Apr 14 21:37:16 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 15 Apr 2005 01:37:16 GMT
Subject: New-style classes, iter and PySequence_Check
References: <d3m795$cuq$1@epityr.hut.fi> <_u-dnQ8UApqBQ8PfRVn-hw@comcast.com>
Message-ID: <425ef142.399754396@news.oz.net>

On Thu, 14 Apr 2005 15:18:20 -0600, Steven Bethard <steven.bethard at gmail.com> wrote:

>Tuure Laurinolli wrote:
>> Someone pasted the original version of the following code snippet on 
>> #python today. I started investigating why the new-style class didn't 
>> work as expected, and found that at least some instances of new-style 
>> classes apparently don't return true for PyInstance_Check, which causes 
>> a problem in PySequence_Check, since it will only do an attribute lookup 
>>  for instances.
>> 
>> Things probably shouldn't be this way. Should I go to python-dev with this?
>> 
>> Demonstration snippet:
>
>For anyone who's curious, here's what the code actually does:
>
>py> args={'a':0}
>py> class Args(object):
>...     def __getattr__(self,attr):
>...         print "__getattr__:", attr
>...         return getattr(args,attr)
>...
>py> class ClassicArgs:
>...     def __getattr__(self, attr):
>...         print "__getattr__:", attr
>...         return getattr(args, attr)
>...
>py> c = ClassicArgs()
>py> i = c.__iter__()
>__getattr__: __iter__
>py> print i
><dictionary-keyiterator object at 0x0115D920>
>py> i = iter(c)
>__getattr__: __iter__
>py> print i
><dictionary-keyiterator object at 0x01163CA0>
>py> a = Args()
>py> i = a.__iter__()
>__getattr__: __iter__
>py> print i
><dictionary-keyiterator object at 0x01163D20>
>py> i = iter(a)
>Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "D:\Steve\My Programming\pythonmodules\sitecustomize.py", line 
>37, in iter
>     return orig(*args)
>TypeError: iteration over non-sequence
>
I think this is a known thing about the way several builtin functions like iter work.
I'm not sure, but I think it may be expedient optimization practicality beating purity.
IOW, I think maybe iter(a) skips the instance logic altogether and goes right to
type(a).__iter__(a) instead of looking for something on the instance shadowing __iter__.
And I suspect iter(a) does its own internal mro chase for __iter__, bypassing even a
__getattribute__ in a metaclass of Args, as it appears if you try to monitor that way. E.g.,

 >>> class Show(object):
 ...     class __metaclass__(type):
 ...         def __getattribute__(cls, attr):
 ...             print 'Show.__getattribute__:', attr
 ...             return type.__getattribute__(cls, attr)
 ...     def __getattribute__(self, attr):
 ...         print 'self.__getattribute__:', attr
 ...         return object.__getattribute__(self, attr)
 ...
 ...
 >>> show = Show()
 >>> Show.__module__
 Show.__getattribute__: __module__
 '__main__'
 >>> show.__module__
 self.__getattribute__: __module__
 '__main__'
 >>> show.__iter__
 self.__getattribute__: __iter__
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 8, in __getattribute__
 AttributeError: 'Show' object has no attribute '__iter__'
 >>> Show.__iter__
 Show.__getattribute__: __iter__
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 5, in __getattribute__
 AttributeError: type object 'Show' has no attribute '__iter__'

But no interception this way:
 >>> iter(show)
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: iteration over non-sequence


Naturally __getattr__ gets bypassed too, if there's no instance attribute lookup even tried.

If we actually supply an __iter__ method for iter(a) to find as type(a).__iter__, we can see:

 >>> class Args(object):
 ...     def __getattr__(self, attr):
 ...         print "__getattr__:", attr
 ...         return getattr(args, attr)
 ...     def __iter__(self):
 ...         print "__iter__"
 ...         return iter('Some kind of iterator')
 ...
 >>> a = Args()
 >>> a.__iter__
 <bound method Args.__iter__ of <__main__.Args object at 0x02EF8BEC>>
 >>> a.__iter__()
 __iter__
 <iterator object at 0x02EF888C>
 >>> iter(a)
 __iter__
 <iterator object at 0x02EF8CAC>
 >>>
 >>> type(a).__iter__
 <unbound method Args.__iter__>
 >>> type(a).__iter__(a)
 __iter__
 <iterator object at 0x02EF8CAC>

Now if we get rid of the __iter__ method, __getattr__ can come into play again:

 >>> del Args.__iter__
 >>> a.__iter__
 __getattr__: __iter__
 <method-wrapper object at 0x02EF8C0C>
 >>> a.__iter__()
 __getattr__: __iter__
 <dictionary-keyiterator object at 0x02EF8CE0>
 >>> type(a).__iter__
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 AttributeError: type object 'Args' has no attribute '__iter__'
 >>> iter(a)
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: iteration over non-sequence

It's kind of like iter(a) assuming that type(a).__iter__ is a data descriptor
delivering a bound method instead of an ordinary method, and therefore it can
assume that the data descriptor always trumps instance attribute lookup, and
it can optimize with that assumption. I haven't walked the relevant iter() code.
That would be too easy ;-)

Regards,
Bengt Richter


From jjreavis at gmail.com  Wed Apr  6 15:09:44 2005
From: jjreavis at gmail.com (Jeff  Reavis)
Date: 6 Apr 2005 12:09:44 -0700
Subject: Calling a Perl Module from Python ( future direction of Python)
In-Reply-To: <mailman.1448.1112812981.1799.python-list@python.org>
References: <351e8871050406092449d4585b@mail.gmail.com>
	<mailman.1448.1112812981.1799.python-list@python.org>
Message-ID: <1112814584.585837.244560@f14g2000cwb.googlegroups.com>

An interface to Perl already exists:

http://www.python.org/moin/PyPerl

-jjr



From tim.peters at gmail.com  Fri Apr  1 23:59:13 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 1 Apr 2005 23:59:13 -0500
Subject: Simple thread-safe counter?
In-Reply-To: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
Message-ID: <1f7befae050401205957042389@mail.gmail.com>

[Paul Rubin]
> I'd like to have a function (or other callable object) that returns
> 0, 1, 2, etc. on repeated calls.  That is:
>
>    print f()   # prints 0
>    print f()   # prints 1
>    print f()   # prints 2
>    # etc.
>
> There should never be any possibility of any number getting returned
> twice, or getting skipped over, even if f is being called from
> multiple threads.
> 
> What's the simplest and most natural way to do this?  I can think of a
> few but am not sure that they work.  And I can think of some ways that
> are sure to work, but are messier than I'd like.

The GIL is your friend here:

    import itertools
    f = itertools.count().next

A similar thing can be done with xrange.  But either way sucks if you
call it often enough to exceed the size of a Python short int
(platform C long).  The obvious way with an explicit mutex doesn't
have that problem.


From ivanlan at pauahtun.org  Wed Apr 13 20:27:44 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Wed, 13 Apr 2005 18:27:44 -0600
Subject: Utah Python Users Group
References: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>
	<d3k8ur$2vi$1@vegh.ks.cc.utah.edu>
Message-ID: <425DB900.4E8685DA@pauahtun.org>

Hi All--

Matthew Thorley wrote:
> 
> lugal wrote:
> > Is anyone aware if there's a Utah-based Python User Group? If not, does
> > any else from Utah have any interest in forming a Utah-based Python
> > User Group?
> >
> I'm in Utah, I don't know of any groups but I might be interested.
>
 
Ditto.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From bokr at oz.net  Sat Apr 16 23:05:32 2005
From: bokr at oz.net (Bengt Richter)
Date: Sun, 17 Apr 2005 03:05:32 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
	<Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>
Message-ID: <4261c943.136032804@news.oz.net>

On Sat, 16 Apr 2005 14:01:56 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:

>Reinhold Birkenfeld wrote:
>> Brian Sabbey wrote:
>>> Here is a pre-PEP for what I call "suite-based keyword arguments". The
>>> mechanism described here is intended to act as a complement to thunks.
>>> Please let me know what you think.
>>>
>>> Suite-Based Keyword Arguments
>>> -----------------------------
>>>
>>> Passing complicated arguments to functions is currently awkward in Python.
>>> For example, the typical way to define a class property winds up polluting
>>> the class's namespace with the property's get/set methods.  By allowing
>>> keyword arguments to be defined in a suite following a function call,
>>> complicated arguments can be passed in a cleaner, easier way.
>>>
>>> Examples
>>> ========
>>>
>>> Using suite-based keyword arguments, the code
>>>
>>> f(x = 1)
>>>
>>> is equivalent to
>>>
>>> f():
>>>     x = 1
>>
>> Pretty cool, but it interferes with current suites.
>>
>> How would you write
>>
>> if f(x=1):
>>    print "yes"
>>
>> using suite-based keyword args?
>>
>> Reinhold
>>
>
   if f(x=1) where: x=23:
       print "yes"

"where:" expression trailer intoduces a suite whose net bindings are used to evaluate the names
in the expression it trails, which means the calling parameters, if the expression is a call.
Syntacticaly where:<suite> should be equivalent to '' other than its name binding effect (which
is only for the call -- i.e.,
    x = 123
    foo(x) where: x=1  # => foo(1)
    print x # => 123

>You wouldn't be able to use suite keywords in that situation.  Also, one 
>would not be able to use suite keywords when there is more than one 
>function call on the same line:
>
>y = f()*g():
>  	x = 1    # ??  not allowed

Stretching for it, using my latest and greatest ;-)

    y = f(**::
           x = 1
           y = 'y for f'
        )*g(**::
           x = 'x for g'
           y = 'y for g'
           def foo(): return 'foo for g'
        )

Note that there is no problem adding other parameters, because ::<suite> is just
a unary expression returning dict subtype instance, e.g.,

    y = f(11,22,**::
           x = 1
           y = 'y for f'
        )*g(*args_from_somewhere, **::
           x = 'x for g'
           y = 'y for g'
           def foo(): return 'foo for g'
        )


This assumes that the unary ::<suite> expression returns an ordered dict subtype
instance containing the bindings created in the suite following the unary suite operator ::
E.g,
    d = ::
        x = 1
        y = 2
    print d # => {'x':1, 'y':2}

(Ignore version of previous posts where :: returned d.items() in place of d here)
>
>There is only so much suites can do.  Cases in which you want to do both 
>are probably far enough between that it seems acceptable to me to require 
>two suites:
>
>t = f():
>          x = 1
>if t:
>          y = 1

It's a little clunky, but

    if self.f(self, z, *a) where:
            z=123
            a = getarglist(): # ':' terminates transparent where:<suite>
        y = 1  # indentation as if where:<suite> were == ''

>
>In general, I think that anything more than just a function call with an 
>optional assignment should be disallowed:
>
>y = [f()]:      #  ? probably shouldn't be allowed
>  	x = 1

    y = [f(**:: x=1)] # sort form with single-line <suite> for ::<suite>
or
    y = [f(**::
             x = 1
        )]

isolates the suite better, in case it has logic and fancy stuff
Regards,
Bengt Richter


From peter at engcorp.com  Tue Apr 19 16:59:01 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 19 Apr 2005 16:59:01 -0400
Subject: Refactoring in Python.
In-Reply-To: <mailman.2128.1113938921.1799.python-list@python.org>
References: <8764yiog3y.fsf@hector.domek><mailman.2120.1113930792.1799.python-list@python.org>	<87y8bemxhy.fsf@hector.domek>
	<mailman.2128.1113938921.1799.python-list@python.org>
Message-ID: <0O6dnQQ2MsN77PjfRVn-gQ@powergate.ca>

Terry Reedy wrote:
> Another specifically helpful reference might be Beck's (author?) book on 
> Test-Driven Development.  Part 1 uses an example in Java, I believe.  Part 
> 2, I know, uses an example in Python.  There at least used to be a copy 
> online.

The online copy was merely a draft, never brought up
to the final state of the paper version and, if I
recall correctly, entirely missing the Python sections.

For anyone interested in checking this out further:
it was in the "Files" section of the Yahoo Groups
group called "testdrivendevelopment", along with
several earlier versions.  (The book was developed
in a pseudo-test-driven-development fashion, with
drafts published for feedback from the group readers.)

-Peter


From james at wrong.nu  Thu Apr 14 17:21:36 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Thu, 14 Apr 2005 22:21:36 +0100
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <425EDE12.3030208@transnorm.ch>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<d3ml4c$crn$1@sea.gmane.org> <425EDE12.3030208@transnorm.ch>
Message-ID: <200504142221.41290.james@wrong.nu>

On Thursday 14 April 2005 22:18, Tiziano Bettio wrote:

> Actually your script doesn't work on my python distribution...

Works fine here - did you decompress the first bit of the python executable? 
You have to do that before Fredrick's script works...
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From tomreese at comcast.net  Fri Apr  8 12:05:03 2005
From: tomreese at comcast.net (Tom Reese)
Date: Fri, 08 Apr 2005 12:05:03 -0400
Subject: =?iso-8859-1?q?=D3=BF=D2=2C_THE_GREATEST_NEWS_EVER_!_=B0=BA?=
 =?iso-8859-1?q?=A4=F8=2C=B8=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8?=
 =?iso-8859-1?q?=2C=B8=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8?=
 =?iso-8859-1?q?=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4=F8=2C=B8=B8=2C?=
 =?iso-8859-1?q?=F8=A4=BA=B0=60=B0=BA=A4=F8?=
In-Reply-To: <1112926679.990674.189040@z14g2000cwz.googlegroups.com>
References: <1112926679.990674.189040@z14g2000cwz.googlegroups.com>
Message-ID: <rb6dnZ6Y7YrWNcvfRVn-oA@comcast.com>

Joe Spammer wrote:

<snip>

bah! I thought maybe they found a huge forest of rosewood trees in Brazil.

Tom (disappointed) Reese


From max at alcyone.com  Sun Apr 10 21:41:31 2005
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 10 Apr 2005 18:41:31 -0700
Subject: templating system
In-Reply-To: <mailman.1644.1113148510.1799.python-list@python.org>
References: <mailman.1644.1113148510.1799.python-list@python.org>
Message-ID: <ho-dnRDXra5RSMTfRVn-qQ@speakeasy.net>

Ksenia Marasanova wrote:

> I am looking for fast, simple templating system that will allow me to
> do the following:
> - embed Python code (or some templating code) in the template
> - generate text output (not only XML/HTML)
> 
> I don't need a framework (already have it), but just simple
> templating. The syntax I had in mind is something like that:
> 
> # in Python module
> def some_view():
>     # some code goes here...
>     records = get_some_data()
>     req = get_request_class()
>     return template('some_template.tmpl', **locals()).render()
> 
> # in some_template.tmpl:
> 
> <ul>
> <%for record in records%>
>     <li><a href="<%=record.id%>"><%=record.title%></a></li>
> <%end for%>
> </ul>
> 
> 
>>From what I saw Cheetah seems to be the only one that can do it. I was
> hoping there might be alternatives that I've missed :)
> Thanks!

EmPy will also do this quite handily:

	http://www.alcyone.com/software/empy/

In EmPy, your template would look something like this::

	<ul>
	@[for record in records]@
		<li><a href="@record.id">@record.title</a></li>
	@[end for]@
	</ul>

Batch expanding the template would look like something as simple as 
(substituting in your example)::

	...
	return em.expand(open(templateFilename).read(), **locals())

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   There's this perfect girl / Someone no one can see
   -- Lamya


From fredrik at pythonware.com  Sat Apr 23 04:35:37 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 23 Apr 2005 10:35:37 +0200
Subject: In defense of Visual Basic (was Re: Why Python does *SLICING*
	theway it does??)
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com><_Lm9e.23143$Xm3.17864@trndny01><mailman.2173.1114002239.1799.python-list@python.org><1114003997.778676.144950@z14g2000cwz.googlegroups.com><mailman.2211.1114078086.1799.python-list@python.org><d48cu8$1a9$1@news.doit.wisc.edu><HOadnbQkd5fxmvTfRVn-og@powergate.ca>
	<1114182776.534932.264940@f14g2000cwb.googlegroups.com>
Message-ID: <d4d13r$fam$1@sea.gmane.org>

"beliavsky at aol.com" wrote:

> Sub print_matrix(xmat() As Double)
> Debug.Print UBound(xmat, 1), UBound(xmat, 2)
> 'do stuff with xmat
> End Sub
> 
> It is trivial to allocate and pass multidimensional arrays in VBA, but
> C requires expertise with pointers. The subroutine print_matrix can
> query the dimensions of xmat, so they don't need to be passed as
> separate arguments, as in C. The fact that is tricky to do simple
> things is a sign of the poor design of C

Sounds more like poor C skills on your part.   Here's a snippet from the Python
Imaging Library which takes a 2D array (im) and creates another one (imOut).

Imaging
ImagingRankFilter(Imaging im, int size, int rank)
{
    Imaging imOut = NULL;
    int x, y;
    int i, margin, size2;

    /* check image characteristics */
    if (!im || im->bands != 1 || im->type == IMAGING_TYPE_SPECIAL)
        return (Imaging) ImagingError_ModeError();

    /* check size of rank filter */
    if (!(size & 1))
        return (Imaging) ImagingError_ValueError("bad filter size");

    size2 = size * size;
    margin = (size-1) / 2;

    if (rank < 0 || rank >= size2)
        return (Imaging) ImagingError_ValueError("bad rank value");

    /* create output image */
    imOut = ImagingNew(im->mode, im->xsize - 2*margin, im->ysize - 2*margin);
    if (!imOut)
        return NULL;

    ... actual algorithm goes here ...

    return imOut;
}

The "im" input object carries multidimensional data, as well as all other properties
needed to describe the contents.  There are no separate arguments for the image
dimensions, nor any tricky pointer manipulations.  A Python version of this wouldn't
be much different.

</F>



From eee at nmt.edu  Sat Apr  2 10:05:49 2005
From: eee at nmt.edu (Earl Eiland)
Date: Sat, 02 Apr 2005 08:05:49 -0700
Subject: terminating an inactive process
Message-ID: <1112454348.28947.40.camel@dulcevida>

I'm running a PyWin program that executes another program using
subprocess.Popen().  Unfortunately, this other program isn't well
behaved, and frequently terminates without terminating its process. 
After this happens enough times, all my memory is tied up, and the
machine crashes.

Using subprocess.poll(), I can keep my program from hanging, by timing
out the process, and starting anew.  This still leaves the previous
process hogging memory.  How do I kill the old process in Windows?

Earl



From postmaster at castleamber.com  Sun Apr 24 17:41:48 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 21:41:48 GMT
Subject: Getting into Python, comming from Perl.
References: <mailman.2409.1114365369.1799.python-list@python.org>
Message-ID: <Xns9642A9D05C966castleamber@130.133.1.4>

Miguel Manso wrote:

> What I would like to know is if anyone had these problems and if you can 
> share that experience with me. I'm trying to minimize my "frustration" :)

Read the Python tutorial, front to back, 2 times. Next, read Dive into 
Python (free e-book) front to back, 2 times, make notes the second time.

Then start programming :-D (It's what I am doing)

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


From jerf at jerf.org  Tue Apr 26 15:35:51 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 15:35:51 -0400
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
	<pan.2005.04.26.19.13.19.951487@jerf.org>
	<mailman.2541.1114543472.1799.python-list@python.org>
Message-ID: <pan.2005.04.26.19.35.44.67099@jerf.org>

On Tue, 26 Apr 2005 21:24:30 +0200, andreas wrote:

> On Tue, Apr 26, 2005 at 03:13:20PM -0400, Jeremy Bowers wrote:
>> On Tue, 26 Apr 2005 03:40:16 -0700, ajikoe at gmail.com wrote:
>> 
>> > Hello Mike,
>> > I have to know this topic otherwise my program has to check whether the
>> > file / files are already deleted and this is a little bit messy.
>> 
>> I would be fairly confident in asserting that assuming the file is there,
>> you have permissions, etc., basically that the call succeeds, that the
>> file will be gone.
> Not exactly. The system call is called remove not by accident. It's not
> called delete. So for example if you have a file with multiple names (so called
> hard links) the file will not be gone after os.remove('file')

This gets into another distinction that I didn't want to get into, given
that my message was heavy enough as it is.

But I would say, that even if "file_a" and "file_b" are both (hard) linked
to the same file, and I "remove" "file_a", I am perfectly justified in
saying that "file_a" is gone, deleted, removed, what have you. The file,
the thing we called "file_a", is no longer accessible. That some operating
systems separate "file" from "contents" and thus that I can get at the
contents in some other way doesn't really make that statement untrue;
"file_a" is still gone. "file deleted" hasn't meant "file contents
eliminated from the disk entirely", well, as far as I know, *ever*;
certainly there were undelete operations in DOS, and that's as far back as
I can attest to personally, but I know that "undelete"s could be done
before then, too. In fact one must search in computing for anything to
ever truly be *eliminated*; in more than just file systems, we
de-allocate, re-allocate for something else, and just overwrite. That's a
pervasive pattern.


From pdemb at gazeta.pl  Sat Apr 30 11:50:54 2005
From: pdemb at gazeta.pl (Peter Dembinski)
Date: Sat, 30 Apr 2005 17:50:54 +0200
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
	<42710531.6060006@freemail.gr>
	<mailman.41.1114803391.14961.python-list@python.org>
Message-ID: <87acngjmap.fsf@hector.domek>

jjl at pobox.com (John J. Lee) writes:

[snap]

> Until they install the next program that does this.

If we talk about _real_ users from the _real_ world, the most of them
would just kill the app (or what is the name for stopping running
program in w32) when the download begins[1] :)

[1] 'hey, is that a spyware or what?  what takes so darn long?'

-- 
http://www.pdemb.prv.pl 


From jerf at jerf.org  Sat Apr  2 19:28:10 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 02 Apr 2005 19:28:10 -0500
Subject: testing -- what to do for testing code with behaviour dependant
	upon which files exist?
References: <mailman.1245.1112473860.1799.python-list@python.org>
Message-ID: <pan.2005.04.03.00.28.09.16953@jerf.org>

On Sat, 02 Apr 2005 15:30:13 -0500, Brian van den Broek wrote:
> So, how does one handle such cases with tests?

When I had a similar situation, I created a directory for testing that was
in a known state, and tested on that. If you can test based on a relative
directory, that should work OK.

Non-existant paths shouldn't be too hard to come up with; hardcoding a
constant relative dir of
"THISDIRECTORYCANTPOSSIBLYEXISTANDIFITDOESYOURENUTS" ought to do OK.





From s_david_rose at hotmail.com  Wed Apr 13 09:36:15 2005
From: s_david_rose at hotmail.com (GMane Python)
Date: Wed, 13 Apr 2005 09:36:15 -0400
Subject: Scanner Access in Python
Message-ID: <d3j6v3$hfa$1@sea.gmane.org>

Hello All!
  I was hoping for a bit of advise.  I wanted to know if anyone has any
experience with scanning.  I'm mostly using Windows.  I tried quickly the
pyTwain, but haven't gotten too far with that.  I'm not sure if scanner
access is built-in to other packages, such as maybe PIL or any others?  I
have a Canoscan Lide-50 & Lide 30.

 Thanks!

Dave





From deetsNOSPAM at web.de  Mon Apr 18 14:58:08 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Mon, 18 Apr 2005 20:58:08 +0200
Subject: Replaying multimedia data.
References: <1113850135.308327.204680@z14g2000cwz.googlegroups.com>
Message-ID: <d40vvm$8bn$00$1@news.t-online.com>

> When I am done gathering data, I read them offline using nearly the
> same script as the one I used to gather them. While I don't have a
> problem with reading them in a text format, I would like to display
> them to others than myself in a way that is visually appealing.
> Something along the lines of "replaying" the data. In other words,
> traces like acceleration, would be appearing on a graph as if the robot
> was evolving over time after I push a "replay" button. I'd like to do
> that not only for the nine traces (1-d plots) I have but also with the
> frames taken the camera (in effect, the screen would show a cartoon of
> frames of what the robot saw during the data gathering) in real-time.

For the sensors, you could use PyQwt. It's a great collection of widgets for
displaying scientific data.

The image data - well, you can display images of various formats using Qt
(and other toolkits too, of course). So you have to provide them with that
data. 
-- 
Regards,

Diez B. Roggisch


From fredrik at pythonware.com  Fri Apr 22 03:46:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 22 Apr 2005 09:46:07 +0200
Subject: regarding system function
References: <20050422073533.28224.qmail@web8408.mail.in.yahoo.com>
Message-ID: <d4a9rb$kqe$1@sea.gmane.org>

"praba kar" wrote:

> I agree above statement but When I delete a directory
> os.system('rm -rf test')
> 0
> if directory is not present then I again try to
> delete
> os.system('rm -rf test')
> now this time also It will print
> 0

so?  if you read the "rm" man page, you'll find this little paragraph:

       -f, --force
              ignore nonexistent files, never prompt

if you don't want "rm" to ignore nonexistent files, don't use -f.  and if you want
total control over the removal process, don't use an external process.

</F> 





From martin at v.loewis.de  Tue Apr 12 17:36:59 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 12 Apr 2005 23:36:59 +0200
Subject: Whither python24.dll? {WinCvs 2.0 and Python}
In-Reply-To: <ZEW6e.3082$8i6.263050@news20.bellglobal.com>
References: <ZEW6e.3082$8i6.263050@news20.bellglobal.com>
Message-ID: <425c3f79$0$18839$9b622d9e@news.freenet.de>

Warren Postma wrote:
> It seems that WinCvs needs a python??.dll runtime but that when I
> install Python2.4 it doesn't include this dll.

Where do you get this impression? python-2.4.msi most certainly
includes python24.dll.

> Python 2.3 does.
> 
> What's the recommendation here?

Change the WinCVS source code to actually look for python24.dll,
instead of just looking for python21.dll, python22.dll, and
python23.dll.

Regards,
Martin


From bogus@does.not.exist.com  Mon Apr  4 11:45:01 2005
From: bogus@does.not.exist.com ()
Date: Mon, 04 Apr 2005 15:45:01 -0000
Subject: (no subject)
Message-ID: <mailman.42.1572217869.3356.python-list@python.org>

#! rnews 2776
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!central.cox.net!east.cox.net!filt02.cox.net!peer01.cox.net!cox.net!attga1!attga2!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: unittest vs py.test?
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqxpsxawodf.fsf at cola2.ca.boeing.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Lines: 49
Sender: hgg9140 at cola2.ca.boeing.com
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References: <roy-428D85.21040831032005 at reader1.panix.com> <6I-dnbpiIZJNJNPfRVn-hA at powergate.ca> <6oQ3e.10378$db.6219 at trndny07> <Sd6dnU9B46Le38zfRVn-uA at powergate.ca> <d2rigf$sjj$1 at panix2.panix.com>
Mime-Version: 1.0
Date: Mon, 4 Apr 2005 15:30:36 GMT
Xref: news.xs4all.nl comp.lang.python:370744

roy at panix.com (Roy Smith) writes:

> Peter Hansen  <peter at engcorp.com> wrote:
> >It seems possible to me that I might have helped him
> >solely by pointing out that unittest might not be so
> >"heavy" as some people claimed.  I got the impression
> >that he might be swayed by some unfounded claims not
> >even to look further at unittest, which I felt would
> >be a bad thing.
> 
> I'm the "him" referred to above.  I've been using unittest ever since
> it was first added to the standard library (actually, now that I think
> about it, I believe I may have been using it even before then).
> 
> And yes, I think unittest brings along a certain amount of baggage.
> There is something attractive about having the same basic framework
> work in many languages (PyUnit, JUnit, C++Unit, etc), but on the other
> hand, it does add ballast.  I use it, I certainly don't hate it, but
> on the other hand, there are enough things annoying about it that it's
> worth investing the effort to explore alternatives.
> 
> From the few days I've been playing with py.test, I think I like what
> I see, but it's got other issues.  The "optimization elides assert"
> issue we've been talking about is one.
> 
> It's also neat that I can write unittest-style test classes or go the
> simplier route of just writing static test functions, but there's a
> certain amount of TIMTOWTDI (did I spell that right?) smell to that.
> 
> I'm also finding the very terse default output from unittest (basicly
> a bunch of dots followed by "all N tests passed") highly preferable to
> py.test's verbosity.
> 
> In short, I haven't made up my mind yet, but I do appreciate the input
> I've gotten.
> 
> 

I haven't used pytest, so no comparisons to offer.  But for unittest,
I've found a lot of the "baggage" can be automated.  My mkpythonproj
(http://www.seanet.com/~hgg9140/comp/index.html#L006) does that.  When
you generate a project, you get a unittest suite with a default test
ready to run, and the mechanisms needed to add more.


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 11:34:37 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 16:34:37 +0100
Subject: preallocate list
In-Reply-To: <GpSdndGkpZxpqsDfRVn-hw@comcast.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j6p7$ntl$1@scotsman.ed.ac.uk>
	<GpSdndGkpZxpqsDfRVn-hw@comcast.com>
Message-ID: <d3je50$ol8$1@scotsman.ed.ac.uk>

Steven Bethard wrote:
> Jim wrote:
> 
>> Thanks for the suggestions. I guess I must ensure that this is my 
>> bottle neck.
>> <code>
>>     def readFactorsIntoList(self,filename,numberLoads):
>>     factors = []
>>         f = open(self.basedir + filename,'r')
>>         line = f.readline()
>>         tokens = line.split()
>>         columns = len(tokens)
>>         if int(columns) == number:
>>             for line in f:
>>                 factor = []
>>                 tokens = line.split()
>>                 for i in tokens:
>>                     factor.append(float(i))
>>                 factors.append(loadFactor)
>>         else:
>>             for line  in f:
>>                 tokens = line.split()
>>                 factors.append([float(tokens[0])] * number)
>>     return factors
>> </code>
>>
>> OK. I've just tried with 4 lines and the code works. With 11000 lines 
>> it uses all CPU for at least 30 secs. There must be a better way.
> 
> 
> Was your test on *just* this function?  Or were you doing something with 
> the list produced by this function as well?
> 

Just this. I had a breakpoint on the return.

I'm going to try peufeu's line of code and I'll report back.

Jim


From fperez.net at gmail.com  Wed Apr  6 00:37:02 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Tue, 05 Apr 2005 22:37:02 -0600
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
	<1112732528.830194.320710@z14g2000cwz.googlegroups.com>
Message-ID: <d2vouk$dtk$1@sea.gmane.org>

syd wrote:

> Thanks for all the help, guys!

> Fernando, that's a creative solution, I'll try it as well...
> while 1:
>   if os.path.isfile(your_plot_filename):
>     break
>   time.sleep(1)

More like a desperate brute force one, but it gets the job done :)  You
mentioned having ipython, so you can look in the Gnuplot2 module there, around
line 630.  You'll see the lengths ipython goes to to ensure that .eps files are
properly created if you call plot() with a filename argument.  That solution
has a cutoff, it tries 20 times and eventually gives up if it still doesn't
work.  You may want to implement something similar, to avoid endlessly waiting
for your plot in case there is a more serious problem preventing the file from
being created at all.

On a different note, you might want to check out matplotlib.  I held out as a
diehard gnuplot user for a long time, waiting for matplotlib to become
production ready (I've been using gnuplot since 1991!).  But mpl has really
matured recently, and it offers a level of sophistication and features that
gnuplot simply can't match.  Give it a try, you may like it.  I've moved my
production code to it, and couldn't be happier.  The gnuplot support will
remain in ipython for those who like it, but I won't be adding further features
to it (not that it has changed much in a while, as it's pretty solid).

best,

f



From removethis.kartic.krishnamurthy at gmail.com  Tue Apr 26 19:22:04 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Tue, 26 Apr 2005 23:22:04 GMT
Subject: App suggestion please: blog / forum software in Python
In-Reply-To: <mailman.2547.1114553904.1799.python-list@python.org>
References: <mailman.2547.1114553904.1799.python-list@python.org>
Message-ID: <w2Abe.1320$Ne7.864@newssvr17.news.prodigy.com>

The Great 'Stewart Midwinter' uttered these words on 4/26/2005 6:18 PM:
> I'm starting up a new website for a small community of local sports
> enthusiasts.  I want to be able to create pages of information easily
> (i.e. a content management system), but also allow for discussion on
> multiple topics (i.e. a forum). Numerous people should be able to log
> in and create or update content, under the guidance of an admin
> naturally.
> 
> Call me perverse, but I don't want to use phpBB for the forum.  I'm
> not seeing anything available in Python though - except for Karrigell.
> is that the only option, or am I missing something?
> 

Dear Stewart,

http://snakelets.sourceforge.net/frog/index.html - "Frog - a Python Web 
Logging tool".

I have no experience with Snakelets or CherryPy. Apparently you can run 
Snakelets behind your existing webserver, so integrating it should be 
rather straight forward. You can probably proxy requests to the blog 
piece to the Snakelets process, while the rest of your site is served by 
CherryPY.

Googling "Python Web Logging Application" brought up 
http://www.kryogenix.org/code/vellum/ as well.

Thanks,
-Kartic


From fred.dixon at gmail.com  Thu Apr 28 19:52:40 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 28 Apr 2005 16:52:40 -0700
Subject: dynamically generating temporary files through python/cgi
In-Reply-To: <d4qjra$7cc$2@gemini.csx.cam.ac.uk>
References: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
	<d4qbdn$hia$1@gemini.csx.cam.ac.uk>
	<d4qjra$7cc$2@gemini.csx.cam.ac.uk>
Message-ID: <1114732359.966056.301530@l41g2000cwc.googlegroups.com>

import tempfile
works under windows and linux



From fabioz at esss.com.br  Mon Apr 25 13:58:13 2005
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Mon, 25 Apr 2005 14:58:13 -0300
Subject: ANN: PyDev 0.9.3 released
In-Reply-To: <424C2A8E.9030104@esss.com.br>
References: <42261366.3020602@esss.com.br> <424C2A8E.9030104@esss.com.br>
Message-ID: <426D2FB5.1080109@esss.com.br>

Hi All,

PyDev - Python IDE (Python development enviroment for Eclipse) version 
0.9.3 has just been released.

Check the homepage (http://pydev.sourceforge.net/) for more details.

Regards,

Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

PyDev - Python Development Enviroment for Eclipse
pydev.sf.net
pydev.blogspot.com



From mauriceling at acm.org  Tue Apr 26 17:51:18 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 07:51:18 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com><d4kh4q$tqf$1@domitilla.aioe.org>	<86wtqqm27r.fsf@guru.mired.org><d4ktck$r9a$1@domitilla.aioe.org>	<86is29n9cg.fsf@guru.mired.org>
	<d4l825$mj7$1@domitilla.aioe.org>
	<mailman.2525.1114534435.1799.python-list@python.org>
Message-ID: <d4md4t$gfm$1@domitilla.aioe.org>


> 
> One difference between Java and Python is this: Java bytecodes are, as I 
> understand it, part of the Java language definition.  CPython bytecodes are 
> intentionally not part of the language at all.  Except maybe fore PyPy, 
> other implementations do not use them.  Jython translates Python source to 
> Java bytecodes.  Pyrex translates augmented Python source to C, to be 
> compiled to native machine code.  Ironman translates, I presume, to .NET 
> common language.  PyParrot (don't know if it has an official name) 
> translates to Parrot bytecodes.  Viper translated to OCamel.
> 
> If you want an implementation with frozen bytecodes, you are free to make 
> one ;-)
> 
> Terry J. Reedy
> 
>

So there are currently 7 implementations or variations of the Python 
language and you are suggesting I make another one? If I am to do that, 
I will use CPython 2.4.1 and call it a implementation that maintains the 
current set of bytecodes (newer versions can have more bytecodes and 
deprecated bytecodes are still left there for backward compatibility) 
and C API interface. Till now I still do not know what is so exceedingly 
prohibitive to do that? Why should I create such a direct fork? 
Personally I do not have the resources to maintain this fork.

The Pacman (binary executable) that I played on a 286 a decade ago still 
works well on my brother's pentium III system, so from the point of a 
user, it is backward compatible. The same can't be said for .pyc files 
or .so files (I may be wrong with .so files here).

What I do have resources (time and energy) for is to work with the 
maintainers of PyPI to implement the package maintenance system I've 
described......

maurice


From fredrik at pythonware.com  Tue Apr 12 04:16:14 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 10:16:14 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de><ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
Message-ID: <d3fvuo$1q9$1@sea.gmane.org>

Uwe Mayer wrote:

>> It strikes me that I've never wanted or needed a singleton object.
>> Would you mind sharing your use case?  I'm just curious.
>
> I am using a class to manage configuration settings in an application. This
> object should only existe once so that when the user
> changes a setting through a configuration dialog the change imminent in all
> locations where access to config settings are needed.

So use a module-level object, and be done with it.

Or if you're using an application object (you should), just add a config object
to the application object (app.config.param = ...).

Or use a module to hold the configuration data (import config; config.param = ...);
serializing to and from module variables work really well in Python.

> I was using a factory function bevore, but since I am starting to use Python
> 2.4 and I remembered having read about a singleton-decorator I went to look
> deeper into the possibilities.

I'm sure your users would love you even more if you spend that time and
energy adding stuff to the application... ;-)

</F> 





From tzot at sil-tec.gr  Fri Apr 15 04:16:59 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 15 Apr 2005 11:16:59 +0300
Subject: How to name Exceptions that aren't Errors
References: <3blfl8F6gt80jU1@individual.net> <_8-dnTyvubKUBMjfRVn-3Q@is.co.za>
	<3blmgjF6gh1egU1@individual.net>
Message-ID: <tm3u51dp2burggi4q27j8uujdkt1pb3odh@4ax.com>

On 7 Apr 2005 21:20:19 GMT, rumours say that Leo Breebaart
<leo at lspace.org> might have written:

[Max about Leo]
>> This guys famous in the alternative universe of
>> alt.fan.pratchett.

The little imp stopped moving the memory blocks around as soon as it
heard the distinct click of the name "Breebart"[1] falling into place.


[1] "Breeb*aa*rt" you say.  Ok then, double click.


>I doubt anybody here cares!

I WAS EXPECTING TO MEET THEE IN ALT.FAN.PRATCHETT.
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From Jude at private.net.invalid  Thu Apr  7 02:59:43 2005
From: Jude at private.net.invalid (Jude)
Date: Thu, 07 Apr 2005 06:59:43 GMT
Subject: Access denied calling FireEvent in Python
References: <1111000819.365435.247600@z14g2000cwz.googlegroups.com>
	<1112019454.165506.211560@g14g2000cwa.googlegroups.com>
	<1112288145.398309.214090@z14g2000cwz.googlegroups.com>
Message-ID: <zT45e.63$cj2.54@read3.inet.fi>

> > Set the "campus" listbox value and theb call fire event, such as in
> the
> > code below.  I get an "access denied" error.
Fire-events on campuses were forbidden by George W because of
terrorists might use them.
    Jeff



From Sebastien.Boisgerault at gmail.com  Tue Apr 19 15:41:52 2005
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 19 Apr 2005 12:41:52 -0700
Subject: fpectl
In-Reply-To: <mailman.2117.1113928370.1799.python-list@python.org>
References: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
	<mailman.2071.1113869781.1799.python-list@python.org>
	<1113900597.167410.91470@z14g2000cwz.googlegroups.com>
	<mailman.2117.1113928370.1799.python-list@python.org>
Message-ID: <1113939712.869359.60960@f14g2000cwb.googlegroups.com>


Good ! And thanks for the link. I had not noticed the warning "fpectl
module is dangerous" before.

I am a bit sad that the floating-point issue is disappearing from the
*active topics* list ...

Cheers,

SB



From pinard at iro.umontreal.ca  Fri Apr  1 23:55:37 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Fri, 1 Apr 2005 23:55:37 -0500
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d2kqqt$ss7$1@panix2.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
Message-ID: <20050402045537.GA29556@phenix.progiciels-bpi.ca>

[Aahz]
> =?iso-8859-1?Q?Fran=E7ois?= Pinard  <pinard at iro.umontreal.ca> wrote:

> >No doubt it once was true, but I guess this ideal has been
> >abandoned a few years ago.  My honest feeling is that it would be a
> >mis-representation of Python, assertng today that this is still one
> >of the Python's ideals.

> Mind providing evidence rather than simply citing your feelings?

The important word was "honest", not "feeling". :-)

> Yes, there's certainly redundancy in Python right now, [...]

See here, I'm not asking you for proofs. :-)

> but a large portion of that will go away in Python 3.0.

And when will that be?  The principle of "there is only way to do it"
was observable in Python 1.5.2, and started to disappear at that time.
How many years between 1.5.2 and 3.0?

> So where's the abandonment of the ideal?

Many of us are using Python today, week after week, year long.  So let's
be pragmatic.  Python is what it became and now is.  Let's not define it
as a memory from the past nor as a futuristic dream.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From andreis at stud.cs.uit.no  Fri Apr 22 08:59:59 2005
From: andreis at stud.cs.uit.no (=?ISO-8859-1?Q?Andr=E9_S=F8reng?=)
Date: Fri, 22 Apr 2005 14:59:59 +0200
Subject: SSL Server Socket Support in Python?
Message-ID: <d4ask9$2kjk$1@news.uit.no>


I'm trying to create a SSL-enabled server in Python, and in the doc for
the socket module:

ssl(sock[, keyfile, certfile])
      Initiate a SSL connection over the socket sock. keyfile is the 
name of a PEM formatted
      file that contains your private key. certfile is a PEM formatted 
certificate chain file.
      On success, a new SSLObject is returned.

So:

listen_socket = socket.socket()
listen_socket.bind((addr, port))
listen_socket.listen(10)
s, addr = listen_socket.accept()
ssl_s = socket.ssl(s, "key.pem", "cert.pem")
> socket.sslerror: (1, 'error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol')

Am I missing something?


From pete at osc.edu  Tue Apr 19 09:35:03 2005
From: pete at osc.edu (Peter G Carswell)
Date: Tue, 19 Apr 2005 09:35:03 -0400
Subject: New to Tkinter...
Message-ID: <d431e1$9ee$1@malgudi.oar.net>

Good Morning.

I am new to Tkinter. I have been testing the installation of Tkinter 
through the python web site. The first two test steps give no errors, 
'import _tkinter' and 'import Tkinter'. However, the third step, 
'Tkinter._test', gives the error:
    <function _test at 0xb7ec8df4>

Any suggestions?

pete

-- 
Peter G. Carswell   
The Ohio Supercomputer Center
pete at osc.edu
work: 614.292.1091  
fax:  614.292.XXXX
"DOC NOTE, I DISSENT. A FAST NEVER PREVENTS A FATNESS. I DIET ON COD."
-Peter Hilton



From lbates at syscononline.com  Tue Apr 26 09:42:17 2005
From: lbates at syscononline.com (Larry Bates)
Date: Tue, 26 Apr 2005 08:42:17 -0500
Subject: How to exctract title of links
In-Reply-To: <426e31e9$0$12342$626a14ce@news.free.fr>
References: <426e31e9$0$12342$626a14ce@news.free.fr>
Message-ID: <ZZKdnR3CjZe_2PPfRVn-2Q@comcast.com>

You should take a look at BeautifulSoup at:

http://www.python.org/pypi/BeautifulSoup/2.0.2

Larry Bates

raver2046 wrote:
> here i have a link  <a href="http://raver2046.ath.cx/CV/">cv network 
> admin</a>
> 
> how to extract  "cv network admin"
> 
> 
> here is the code i have find to exctract link but not title of link
> 
> ----------------------------
> import htmllib, formatter, urllib
> class x(htmllib.HTMLParser):
>     def dump(self, tag, attrs):
>         #print tag,
>         for a, v in attrs:
>             if a in ['a', 'src', 'href']:
>                 print v,
> 
>         print
>     #def do_img(self, attrs):
>     #    self.dump('img', attrs)
>     def start_a(self, attrs):
>         self.dump('a', attrs)
>     #def start_form(self, attrs):
>     #    self.dump('form', attrs)
> 
> y = x(formatter.NullFormatter())
> y.feed(urllib.urlopen('http://www.aquabase.org/fish/dump.php3').read())
> y.close()
> 
> 
> ----------------------------
> 
> http://raver2046.ath.cx/CV/cv_fr.html 
> 
> 


From RonGrossi_38116 at yahoo.com  Thu Apr  7 22:18:00 2005
From: RonGrossi_38116 at yahoo.com (RonGrossi_38116 at yahoo.com)
Date: 7 Apr 2005 19:18:00 -0700
Subject: =?iso-8859-1?q?=D3=BF=D2=2C_THE_GREATEST_NEWS_EVER_!_=B0=BA=A4?=
	=?iso-8859-1?q?=F8=2C=B8=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4?=
	=?iso-8859-1?q?=F8=2C=B8=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4?=
	=?iso-8859-1?q?=F8=2C=B8=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8=B0=BA=A4?=
	=?iso-8859-1?q?=F8=2C=B8=B8=2C=F8=A4=BA=B0=60=B0=BA=A4=F8?=
Message-ID: <1112926679.990674.189040@z14g2000cwz.googlegroups.com>

 
http://www.print-it.blogspot.com << The Greatest News Ever!



From msoulier at gmail.com  Wed Apr 27 10:37:11 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Wed, 27 Apr 2005 10:37:11 -0400
Subject: compile shebang into pyc file
In-Reply-To: <1114564551.358418.15350@g14g2000cwa.googlegroups.com>
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
	<1114564551.358418.15350@g14g2000cwa.googlegroups.com>
Message-ID: <fb66056705042707372695904d@mail.gmail.com>

On 26 Apr 2005 18:15:51 -0700, johnlichtenstein at gmail.com
<johnlichtenstein at gmail.com> wrote:
> Is there some reason why you want to run the .pyc file, rather than the
> .py file? If you start the script with

a. It's more efficient, since the code doesn't need to be compiled
before it's run.
b. What if you want to ship closed-source?

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'


From prabapython at yahoo.co.in  Thu Apr 21 03:05:47 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Thu, 21 Apr 2005 08:05:47 +0100 (BST)
Subject: regarding main function
In-Reply-To: 6667
Message-ID: <20050421070547.41595.qmail@web8402.mail.in.yahoo.com>

Dear All,

   I want to know the difference between calling 
a function directly and through main function
compose() 

if __name__ == __main__:
    compose()

 

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From dwyoon at purunSPAMinfo.co.kr  Fri Apr 15 07:01:40 2005
From: dwyoon at purunSPAMinfo.co.kr (Daewon YOON)
Date: Fri, 15 Apr 2005 20:01:40 +0900
Subject: PIL pilfont.py
In-Reply-To: <d3lqo4$k7d$1@news.kreonet.re.kr>
References: <d3lqo4$k7d$1@news.kreonet.re.kr>
Message-ID: <d3o6ep$1b6$1@news.kreonet.re.kr>

Daewon YOON wrote:
> Hi.
> 
> I tried to convert a bdf file using pilfont.py script. Instead producing
> pretty font images, it complained like following.
> 
> **
> daewian:~/fonting$ ./pilfont.py gulim24.bdf
> gulim24.bdf...
> Traceback (most recent call last):
>   File "./pilfont.py", line 47, in ?
>     p.save(f)
>   File "/usr/lib/python2.3/site-packages/PIL/FontFile.py", line 105, in
> save1
>     self.bitmap.save(os.path.splitext(filename)[0] + ".pbm", "PNG")
> AttributeError: 'NoneType' object has no attribute 'save'
> **
> 
> Gulim is a korean font with KSX encoding.
> The script worked fine with a ntimb08.bdf. So I suspect the script
> doesn't like non-latin characters.
> 
> Can anybody help me?
> 
> BTW, my previous problem with truetype() was solved. Some ttf files 
> work and others don't.
> 
> --
> zooy

Solved by myself.
Changed '256's in FontFile of FontFile.py to 256 * 256. Then the
sciprt produced pretty .pbm file.

--
zooy


From peter at engcorp.com  Wed Apr  6 17:10:03 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 06 Apr 2005 17:10:03 -0400
Subject: number conversion
In-Reply-To: <1112810997.893405.58560@g14g2000cwa.googlegroups.com>
References: <1112810997.893405.58560@g14g2000cwa.googlegroups.com>
Message-ID: <qZidnUVkBrG0zcnfRVn-ug@powergate.ca>

nicksjacobson at yahoo.com wrote:
> fmt = str(chunklen) + 'B'
> fmtsize = struct.calcsize(fmt)
> rawdata = struct.unpack(fmt, s[:fmtsize])
> rawdata = list(rawdata)
> 
> Then I tried to convert it:
> 
> charary = array.array('b')
> charary.fromlist(rawdata)

Uh, don't you want to be consistent in your use
of signed and unsigned characters?  You've got
both a 'B' and a 'b' above, and I believe you
need to pick one and stick with it...


From jdh2358 at gmail.com  Fri Apr 22 17:01:36 2005
From: jdh2358 at gmail.com (jdh2358 at gmail.com)
Date: 22 Apr 2005 14:01:36 -0700
Subject: trying to read from dying disk
In-Reply-To: <871x92mv76.fsf@pobox.com>
References: <1114195387.535143.76860@o13g2000cwo.googlegroups.com>
	<871x92mv76.fsf@pobox.com>
Message-ID: <1114203696.267519.189200@o13g2000cwo.googlegroups.com>

  > This sounds like a linux kernel question much more than a Python
  > one. Try a linux programmers' list?

Except that I'm writing a *python* program and trying to do a timeout
on the python *file* read operation.  If I asked the question on the
kernel mailing list, they would rightlyfully assume I suspect that I
should be writing a C program, and then they would suggest c.l.py.

I'm currently attempting something with

  http://www.python.org/doc/current/lib/node368.html

but it seems the read operation is ignoring these signals just as it is
ignoring my signals from the kill command -- perhaps unsurprisingly.

Perhaps there is no hope.
JDH



From exogen at gmail.com  Thu Apr 28 05:40:09 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 28 Apr 2005 05:40:09 -0400
Subject: Which IDE is recommended?
In-Reply-To: <d4qamk$59u$1@eeyore.INS.cwru.edu>
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
Message-ID: <d4qb1m$59u$3@eeyore.INS.cwru.edu>

Brian Beck wrote:
>>What version? PyDev has increased in maturity quite a bit lately.

I realize 0.9.3 is the latest release, but the installation fails
through the Eclipse updater:

Unable to complete action for feature "PyDev for Eclipse" due to errors.
  Unable to create file
"/opt/eclipse-extensions-3/eclipse/plugins/org.python.pydev_0.9.3/PySrc/SocketTestRunner.py".
[/opt/eclipse-extensions-3/eclipse/plugins/org.python.pydev_0.9.3/PySrc/SocketTestRunner.py
(No such file or directory)]

--
Brian Beck
Adventurer of the First Order


From chris.lyon at spritenote.co.uk  Sat Apr 30 04:56:18 2005
From: chris.lyon at spritenote.co.uk (chris.lyon at spritenote.co.uk)
Date: 30 Apr 2005 01:56:18 -0700
Subject: Library Naming Conventions.
Message-ID: <1114851378.781754.194030@z14g2000cwz.googlegroups.com>

Is there any specific naming convention as to capitalisation?

Cookies versus cgi for example.



From dave at pythonapocrypha.com  Mon Apr 11 18:37:12 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Mon, 11 Apr 2005 16:37:12 -0600
Subject: semicolons
In-Reply-To: <425AF6AB.900@mage.hu>
References: <425AF6AB.900@mage.hu>
Message-ID: <425AFC18.60708@pythonapocrypha.com>

Mage wrote:
> I amafraid of I will stop using semicolons in other languages after one
> or two months of python. However I see that python simply ignores the
> semicolons atd the end of the lines.
> 
> What's your advice? I don't want to write full-of-typo php scripts but I
> see the logic of the python syntax too.

Don't punish Python for the shortcomings of other languages! :)

-Dave


From michele.simionato at gmail.com  Sat Apr  9 01:31:46 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Apr 2005 22:31:46 -0700
Subject: shelve and concurrency
Message-ID: <1113024706.521976.83410@l41g2000cwc.googlegroups.com>

The standard library says:
"""
The shelve module does not support concurrent read/write access to
shelved objects. (Multiple simultaneous read accesses are safe.) When a
program has a shelf open for writing, no other program should have it
open for reading or writing.
"""

But what about threads? If a single program open a shelve and many
threads
try to write simultaneously to it, do I get an error? I would say yes,
but after various attempts, I cannot get it, at least on Linux, where
shelve is using dbhash as database. Can somebody share any light,
please?

    Michele Simionato



From fabio.pliger at siavr.it  Sun Apr 10 10:10:31 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Sun, 10 Apr 2005 14:10:31 GMT
Subject: check instace already running...
References: <hpM5e.36121$IN.685498@twister2.libero.it>	<2ab2ed5505040902024cc47944@mail.gmail.com>
	<mailman.1606.1113038508.1799.python-list@python.org>
	<42590357$0$28646$636a15ce@news.free.fr>
Message-ID: <rta6e.38149$IN.718944@twister2.libero.it>

"Aldric L'Hernault" <aldric.lhernault at free.fr.net^W> ha scritto nel
messaggio news:42590357$0$28646$636a15ce at news.free.fr...
> Sidharth Kuruvila a ?crit :
> > I haven't tested this. There is probably a better way of doing this
> > looking at process information. I use a lock file to mark that the
> > program is already running. The problem is that for an abrupt shutdown
> > the file might not be removed.
>
> To enhance your check, just write the PID into the file.
> On startup, if file exists, you may check that the process
> who has written it is still alive.
>
> Aldric L.


Yeah, but how can i retrieve my PID number?And how do i check if the process
who has written the file is still alive?If there a way to have the list of
the precesses running?





From jerf at jerf.org  Fri Apr  1 16:52:52 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 16:52:52 -0500
Subject: Pseudocode in the wikipedia
References: <1112362451.848227.208120@z14g2000cwz.googlegroups.com>	<d2k70u$70h$1@sea.gmane.org>	<mailman.1205.1112386538.1799.python-list@python.org>	<n9br41pcarifbu9umt6aligt9g5bdnscb5@4ax.com>	<mailman.1209.1112389377.1799.python-list@python.org>
Message-ID: <pan.2005.04.01.21.52.40.46900@jerf.org>

On Fri, 01 Apr 2005 16:02:53 -0500, Gabriel Cooper wrote:
> Ron_Adam wrote:
> 
>>To me ":=" could mean to create a copy of an object...  or should it
>>be "=:" ?
>>
>>Or how about ":=)" to mean is equal and ":=(" to mean it's not.
>>
>>Then there is ";=)", to indicate 'True', and ':=O' to indicate 'False'
>>  
>>
> Not to mention "(_ | _)" for asserts!

Your ass is your identity function.

Python 2.3.5 (#1, Mar  3 2005, 17:32:12) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 25
25
>>> (_ | _)
25
>>> 

There's clearly some interesting biometrics research to be done here,
although there is a well-known ass-capturing attack based on readily
commercially available machines from Xerox that might make it hard to make
an ass-based identity system resistant to attacks.


From ross1cowie at hotmail.com  Fri Apr 15 10:48:33 2005
From: ross1cowie at hotmail.com (Ross Cowie)
Date: Fri, 15 Apr 2005 14:48:33 +0000
Subject: Python's use in RAD
Message-ID: <BAY13-F3106F833E30857FB2811994360@phx.gbl>

Hi,

I am currenly a second year university student and was wondering if you 
could help me ut. As part of a project i have decided to write about python, 
i am not having very much luck with regards to finding infrmation on pythons 
use in Rapid Application Development, and was wondering of you could 
highlight some of the features that make it suitable for RAD. Like the use 
of dinamic binding.

Your healp would be appreciated.

Hope to hear from you soon.

Ross




From opengeometry at yahoo.ca  Thu Apr 28 00:45:14 2005
From: opengeometry at yahoo.ca (William Park)
Date: Thu, 28 Apr 2005 00:45:14 -0400
Subject: Fast plotting?
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
Message-ID: <5bbea$42706a5a$d1b714b9$22961@PRIMUS.CA>

Russell E. Owen <rowen at cesmail.net> wrote:
> Can anyone recommend a fast cross-platform plotting package for 2-D 
> plots?
> 
> Our situation:
> We are driving an instrument that outputs data at 20Hz. Control is via 
> an existing Tkinter application (which is being extended for this new 
> instrument) that runs on unix, mac and windows. We wish to update 5-10 
> summary plots at approximately 2 Hz and will be offering controls to 
> control the instrument and the plots, preferably (but not necessarily) 
> mixed in with the plots.

That's 10-20 plots per second.  The only GUI plotter that I know is
'gnuplot', and I don't know if it will spit out anything at 10-20Hz.
For character plots (like old days terminal), it has speed but ugly to
look at.

> 
> Ideally the package would create plots in the Tkinter application. But 
> we realize we're unlikely to get the speed we need that way. So we are 
> willing to have the Tkinter app send data to the plotting package  (e.g. 
> via a socket) and have it display the plots in a separate process.
> 
> We started out with matplotlib, which is a wonderful package (and well 
> integrated with most or all GUI toolkits). Unfortunately it is just too 
> slow -- at least when driving plots integrated with the Tkinter app. (It  
> is getting faster and so are computers, so at some point this will be a 
> great way to go. But for now...)
> 
> Any suggestions?
> 
> -- Russell

-- 
William Park <opengeometry at yahoo.ca>, Toronto, Canada
Slackware Linux -- because it works.


From ajikoe at gmail.com  Mon Apr 11 01:57:18 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 10 Apr 2005 22:57:18 -0700
Subject: hello
In-Reply-To: <mailman.1648.1113162368.1799.python-list@python.org>
References: <mailman.1648.1113162368.1799.python-list@python.org>
Message-ID: <1113199038.707536.176700@o13g2000cwo.googlegroups.com>

Hi Mage,

You can use "for in " instead of "while break". I start from C# and I
found python is wonderfull, some style is strange but it fun anyway to
learn new way of thinking.

Best Regards,
Pujo



From rdm at rcblue.com  Sun Apr 17 03:00:36 2005
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 17 Apr 2005 00:00:36 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <thr361h5pk9km1lsmhakhq7stdi601o0ei@4ax.com>
References: <mailman.1864.1113438657.1799.python-list@python.org>
	<thr361h5pk9km1lsmhakhq7stdi601o0ei@4ax.com>
Message-ID: <6.2.1.2.2.20050416232605.05cfc340@rcblue.com>

Tim Roberts wrote at 22:05 4/16/2005:
>Dick Moores <rdm at rcblue.com> wrote:
> >>
> >># Reading/writing Python source often gives me the impression of
> >># reading/writing a poem!
> >># Layout, indentation, rythm, I like the look and feel!
> >>
> >># What does this tiny program do? It is not a sonnet, even not a
> >># pi-sonnet, but it surely produces Pi!
> >
> >It sure does. When I ran it my jaw dropped. I had 7,947 CORRECT digits in
> >2 minutes 0 seconds (by my stopwatch)!
>
>How do you know?  I think the 7,912th digit is wrong.
>
>;)

I suppose you're joshing, Tim, but I really did check by using my trusty

====================================
def compareSequences(seq1, seq2):
     """
     find first index at which two sequences differ
     """
     if s1 == s2:
         print "Sequences are identical"
         return None
     if len(seq1) >= len(seq2):
         shorterOrEqualSequence = seq2
     else:
         shorterOrEqualSequence = seq1

     for index in range(len(shorterOrEqualSequence)):
         if seq1[index] != seq2[index]:
             print "sequences first differ at index", index
             print "s1 at that index is", s1[index]
             print "s2 at that index is", s2[index]
             break

     if index == len(shorterOrEqualSequence)-1:
         print "sequences are identical thru end of shorter sequence at 
index", index
==================================

I got the "correct" pi from 
<http://www.ballandclaw.com/upi/pi.50000.html>. By inspection of the text 
file I copied this to (removing the "3." of "3.1"), the 7,912th digit is 
"2" (I'm using Textpad). If you begin with "31", which what the speedy 
script does, the 7,912th digit is "6".

Now, I've shown you mine. Show me yours. ;-)

Dick 



From olsongt at verizon.net  Mon Apr 25 12:27:12 2005
From: olsongt at verizon.net (olsongt at verizon.net)
Date: 25 Apr 2005 09:27:12 -0700
Subject: Python23.pdb
In-Reply-To: <1114438461.753620.324570@z14g2000cwz.googlegroups.com>
References: <1114438461.753620.324570@z14g2000cwz.googlegroups.com>
Message-ID: <1114446432.739399.113590@f14g2000cwb.googlegroups.com>


Saravanan wrote:
> Hello,
>
> 1) Is is possible to get the pdb files for the Python version 2.3.3?
>
> Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)]
> on win32
>

These don't exist.  If you have access to VC 6.0 you could check out
the appropriate tag from cvs and do your own build to get them.  If
you're just trying to use Debugging Tools for Windows in an environment
without a compiler you're out of luck.



From mahs at telcopartners.com  Tue Apr 19 16:40:27 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Tue, 19 Apr 2005 13:40:27 -0700
Subject: Array of Chars to String
In-Reply-To: <200504191333.17374.jstroud@mbi.ucla.edu>
References: <200504191333.17374.jstroud@mbi.ucla.edu>
Message-ID: <d43q2k$vbv$1@sea.gmane.org>

James Stroud wrote:
> Hello,
> 
> I am looking for a nice way to take only those charachters from a string that 
> are in another string and make a new string:
> 
> 
>>>>astr = "Bob Carol Ted Alice"
>>>>letters = "adB"
>>>>some_func(astr,letters)
> 
> "Bad"
> 
> I can write this like this:
> 
> astr = "Bob Carol Ted Alice"
> letters = "adB"
> 
> import sets
> alist = [lttr for lttr in astr if lttr in Set(letters)]
> newstr = ""
> for lttr in alist:
>   newstr += lttr
> 
> But this seems ugly. I especially don't like "newstr += lttr" because it makes 
> a new string every time. I am thinking that something like this has to be a 
> function somewhere already or that I can make it more efficient using a 
> built-in tool.
> 
> Any ideas?
> 
> James
> 
How about:
  >>> astr = "Bob Carol Ted Alice"
  >>> letters = "adB"
  >>> "".join(letter for letter in astr if letter in set(letters))
  'Bad'
  >>>
Michael



From rupole at hotmail.com  Sat Apr  9 19:55:40 2005
From: rupole at hotmail.com (Roger Upole)
Date: Sat, 9 Apr 2005 19:55:40 -0400
Subject: wsh and Python 
References: <42583de2$0$6791$626a14ce@news.free.fr>
Message-ID: <42586c42$1_1@127.0.0.1>

Since AppActivate returns a boolean, you should be able
to do something like this:

while not shell.AppActivate(name):
    win32api.Sleep(100)

      Roger

"David Josty" <dav.josty at pasemail> wrote in message 
news:42583de2$0$6791$626a14ce at news.free.fr...
> Hello
>
> I have this function :
> --------------------------------------------------------
> import sys
> import win32com.client
> import win32api
>
> def close_softawre("name")
>    shell = win32com.client.Dispatch("WScript.Shell")
>    shell.AppActivate ("name")
>    win32api.Sleep(100)
>    shell.SendKeys ("%{F4}")
> --------------------------------------------------------- 
> But sometimes i have any problemes, the programme is not activate a time 
> !!!
>
>
> ==> this is wsh !! i don't know translate in python
>
> Do while WshShell.AppActivate ("name") = FALSE
>     wscript.sleep 100
> loop
>
> Thank a lot
>
> a french guy
>
> 




----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
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From MrJean1 at gmail.com  Sat Apr 16 15:49:33 2005
From: MrJean1 at gmail.com (MrJean1)
Date: 16 Apr 2005 12:49:33 -0700
Subject: whitespace , comment stripper, and EOL converter
In-Reply-To: <1113410094.102181.315080@l41g2000cwc.googlegroups.com>
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
Message-ID: <1113680973.635576.310510@g14g2000cwa.googlegroups.com>


Great tool, indeed!  But doc strings stay in the source text.

If you do need to remove doc strings as well, add the following into
the __call__ method.

...      # kill doc strings
...      if not self.docstrings:
...          if toktype == tokenize.STRING and len(toktext) >= 6:
...              t = toktext.lstrip('rRuU')
...              if ((t.startswith("'''") and t.endswith("'''")) or
...                  (t.startswith('"""') and t.endswith('"""'))):
...                  return

as shown in the original post below.  Also, set self.docstrings in the
format method, similar to self.comments as shown below in lines
starting with '...'.


/Jean Brouwers



M.E.Farmer wrote:
> qwweeeit wrote:
> > Thanks! If you answer to my posts one more time I could  consider
you
> as
> > my tutor...
> >
> > It was strange to have found a bug...! In any case I will not go
> deeper
> > into the matter, because for me it's enough your explanatiom.
> > I corrected the problem by hand removing the tokens spanning
multiple
> lines
> > (there were only 8 cases...).
> >
> > Instead I haven't understood your hint about comments...
> > I succeded  in realizing a python script which removes comments.
> >
> > Here it. is (in all its cumbersome and criptic appearence!...):
> >
> > # removeCommentsTok.py
> > import tokenize
> > Input = "pippo1"
> > Output = "pippo2"
> > f = open(Input)
> > fOut=open(Output,"w")
> >
> > nLastLine=0
> > for i in tokenize.generate_tokens(f.readline):
> > .   if i[0]==52 and nLastLine != (i[2])[0]:
> > .   .   fOut.write((i[4].replace(i[1],'')).rstrip()+'\n')
> > .   .   nLastLine=(i[2])[0]
> > .   elif i[0]==4 and nLastLine != (i[2])[0]:
> > .   .   fOut.write((i[4]))
> > .   .   nLastLine=(i[2])[0]
> > f.close()
> > fOut.close()
> >
> > Some explanations for the guys like me...:
> > - 52 and 4 are the arbitrary codes for comments and NEWLINE
> respectively
> > - the comment removing is obtained by clearing the comment (i[1])
in
> the
> >   input line (i[4])
> > - I also right trimmed the line to get rid off the remaining
blanks.
> Tokenizer sends multiline strings and comments as a single token.
>
>
######################################################################
> # python comment and whitespace stripper :)
>
######################################################################
>
> import keyword, os, sys, traceback
> import StringIO
> import token, tokenize
> __credits__ = 'just another tool that I needed'
> __version__ = '.7'
> __author__ = 'M.E.Farmer'
> __date__ =  'Jan 15 2005, Oct 24 2004'
>
>
######################################################################
>
> class Stripper:
>     """python comment and whitespace stripper :)
>     """
>     def __init__(self, raw):
>         self.raw = raw
>
...   def format(self, out=sys.stdout, comments=0, docstrings=0,
spaces=1,
>                 untabify=1, eol='unix'):
>         ''' strip comments, strip extra whitespace,
>             convert EOL's from Python code.
>         '''
>         # Store line offsets in self.lines
>         self.lines = [0, 0]
>         pos = 0
>         # Strips the first blank line if 1
>         self.lasttoken = 1
>         self.temp = StringIO.StringIO()
>         self.spaces = spaces
>         self.comments = comments
...       self.docstrings = docstrings
>
>         if untabify:
>            self.raw = self.raw.expandtabs()
>         self.raw = self.raw.rstrip()+' '
>         self.out = out
>
>         self.raw = self.raw.replace('\r\n', '\n')
>         self.raw = self.raw.replace('\r', '\n')
>         self.lineend = '\n'
>
>         # Gather lines
>         while 1:
>             pos = self.raw.find(self.lineend, pos) + 1
>             if not pos: break
>             self.lines.append(pos)
>
>         self.lines.append(len(self.raw))
>         # Wrap text in a filelike object
>         self.pos = 0
>
>         text = StringIO.StringIO(self.raw)
>
>         # Parse the source.
>         ## Tokenize calls the __call__
>         ## function for each token till done.
>         try:
>             tokenize.tokenize(text.readline, self)
>         except tokenize.TokenError, ex:
>             traceback.print_exc()
>
>         # Ok now we write it to a file
>         # but we also need to clean the whitespace
>         # between the lines and at the ends.
>         self.temp.seek(0)
>
>         # Mac CR
>         if eol == 'mac':
>            self.lineend = '\r'
>         # Windows CR LF
>         elif eol == 'win':
>            self.lineend = '\r\n'
>         # Unix LF
>         else:
>            self.lineend = '\n'
>
>         for line in self.temp.readlines():
>             if spaces == -1:
>                 self.out.write(line.rstrip()+self.lineend)
>             else:
>                 if not line.isspace():
>                     self.lasttoken=0
>                     self.out.write(line.rstrip()+self.lineend)
>                 else:
>                     self.lasttoken+=1
>                     if self.lasttoken<=self.spaces and self.spaces:
>                         self.out.write(self.lineend)
>
>
>     def __call__(self, toktype, toktext,
>             (srow,scol), (erow,ecol), line):
>         ''' Token handler.
>         '''
>         # calculate new positions
>         oldpos = self.pos
>         newpos = self.lines[srow] + scol
>         self.pos = newpos + len(toktext)
>
>         #kill the comments
>         if not self.comments:
>             # Kill the comments ?
>             if toktype == tokenize.COMMENT:
>                 return
>
...       # kill doc strings
...       if not self.docstrings:
...          if toktype == tokenize.STRING and len(toktext) >= 6:
...              t = toktext.lstrip('rRuU')
...              if ((t.startswith("'''") and t.endswith("'''")) or
...                  (t.startswith('"""') and t.endswith('"""'))):
...                  return

>         # handle newlines
>         if toktype in [token.NEWLINE, tokenize.NL]:
>             self.temp.write(self.lineend)
>             return
>
>         # send the original whitespace, if needed
>         if newpos > oldpos:
>             self.temp.write(self.raw[oldpos:newpos])
>
>         # skip indenting tokens
>         if toktype in [token.INDENT, token.DEDENT]:
>             self.pos = newpos
>             return
>
>        # send text to the temp file
>         self.temp.write(toktext)
>         return
>
######################################################################
>
> def Main():
>     import sys
>     if sys.argv[1]:
>         filein = open(sys.argv[1]).read()
>         Stripper(filein).format(out=sys.stdout, comments=1,
untabify=1,
> eol='win')
>
>
######################################################################
> 
> if __name__ == '__main__':
>     Main()
> 
> M.E.Farmer



From sylvain.thenault at logilab.fr  Wed Apr 27 06:04:13 2005
From: sylvain.thenault at logilab.fr (Sylvain Thenault)
Date: Wed, 27 Apr 2005 12:04:13 +0200
Subject: Coding Standards (and Best Practices)
References: <1114538687.21150@hqnntp01.autodesk.com>
	<mailman.2536.1114538888.1799.python-list@python.org>
Message-ID: <pan.2005.04.27.10.04.13.621717@logilab.fr>

On Tue, 26 Apr 2005 11:02:33 -0700, Trent Mick wrote:

> [Isaac Rodriguez wrote]
>> Hi,
>> 
>> I am fairily new to Python, but I am really liking what I am seeing. My team 
>> is going to re-design some automation projects, and we were going to use 
>> Python as our programming language. One of the things we would like to do, 
>> since we are all new to the language, is to define a set of guidelines and 
>> best practices as our coding standards.
>> 
>> Does anyone know where I can get some information about what the community 
>> is doing? Are there any well defined guidelines established?
> 
> http://www.python.org/peps/pep-0008.html

and you may also be interested by a tool such as pylint[1] which help to
enforce coding standards on your code base. Most of the styles suggested
in pep 8 are checked by pylint, using its default configuration.

[1] http://www.logilab.org/projects/pylint/

-- 
Sylvain Th?nault                               LOGILAB, Paris (France).

http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org




From philippecmartin at sbcglobal.net  Fri Apr 15 10:18:54 2005
From: philippecmartin at sbcglobal.net (Philippe C. Martin)
Date: Fri, 15 Apr 2005 09:18:54 -0500
Subject: Using python from a browser/security hole
In-Reply-To: <b273c74105041506527155f010@mail.gmail.com>
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<TkP7e.2472$VA3.2138@newssvr30.news.prodigy.com>
	<b273c74105041506527155f010@mail.gmail.com>
Message-ID: <200504150918.54545.philippecmartin@sbcglobal.net>

Thanks Jim,

From all I hear, it looks like the client authentication will have tobe made 
"on the side of the browser", between the server and a specific program 
running on the client. Not as nice but ....

Regards,

Philippe




On Friday 15 April 2005 08:52 am, James Carroll wrote:
> I don't think Jython will help much here... you would have to embed
> jython in your applet which makes it big, which makes it take longer
> to download... (or you could install it ahead of time on each client.)
>
> I asked my friend who did some smartcard authentication at a previous
> job... and in his case the card had an LCD readout that gave a
> different key every minute, and the user had to look at that number,
> and type it in for access.   To automate this, with a card reader,
> there could be a (barcoder-scanner-like) app on each client that would
> emulate typing on the keyboard when the card was read.  The user would
> have to click on a text field, then scan their card and the number
> would show up automatically.  One step further... some javascript
> could possibly get the keyboard events as long as the page had input
> focus, and if it sees a smart-card key like sequence of keystrokes,
> then submit a form from a hidden IFrame....
>
> So, short of writing your own plug-in extension for each different
> browser, I'm not sure you're going to be able to access the client
> hardware from a client-side web page.  Either way (plug-in or java
> applet with privileges) your user will have to agree to give access to
> the hardware.
>
> -Jim
>
> On 4/15/05, Philippe C. Martin <philippe at philippecmartin.com> wrote:
> > Neil,
> >
> > Would Jpython let me do that ?
> > Would java let me call an external Python script - which in turn would
> > access my device ?
> >
> > Thanks
> >
> > Philippe
> >
> > Neil Hodgson wrote:
> > > Philippe:
> > >> Since I need to access a local/client device from the page and
> > >> that I wish to be cross-platform; does that mean Java is my only
> > >> way out ?
> > >
> > >    Java is designed to be safe and not allow access to client devices.
> > > There is a mechanism where you can attempt to ask for permission from
> > > Java but it looked complex to me and I doubt many browsers will
> > > cooperate. They have often locked security down to prevent this sort of
> > > access.
> > >
> > >    Neil
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list

-- 
*************************************
Philippe C. Martin
SnakeCard, LLC
www.snakecard.com
+1 405 694 8098
*************************************


From sarapythonlist at yahoo.com  Sat Apr 30 06:46:56 2005
From: sarapythonlist at yahoo.com (Sara Khalatbari)
Date: Sat, 30 Apr 2005 03:46:56 -0700 (PDT)
Subject: date to digit
Message-ID: <20050430104656.38575.qmail@web61109.mail.yahoo.com>

Is there a program in python that inputs a date & a
time, for example:  ?2005-04-17 04:20+0000?. And
returns a digit, for example: ?3501? instead? 

and if there is such program or built-in function, how
can I run it inside a code?

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From jack at performancedrivers.com  Fri Apr  8 20:13:25 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 8 Apr 2005 20:13:25 -0400
Subject: Puzzling OO design problem
In-Reply-To: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
Message-ID: <20050409001325.GA21924@performancedrivers.com>

On Fri, Apr 08, 2005 at 04:42:52PM -0700, George Sakkis wrote:
> I'm looking for a design to a problem I came across, which goes like
> this (no, it's not homework):
> 
> 1. There is a (single inheritance) hierarchy of domain classes, say
> A<-B<-..<-Z (arrows point to the parent in the inheritance tree).
> 2. This hierarchy evolved over time to different versions for each
> class. So for example, version's 1 hierarchy would be A_v1 <-B_v1
> <-..<-Z_v1.
> 3. At runtime, only one version is selected by a factory function.
> 
> Up to this point, the inheritance graph would be the following:
> 
> A <- A_V1 ... <- A_Vn
> ^     ^           ^
> |     |           |
> B <- B_V1 ... <- B_Vn
> .     .           .
> .     .           .
> .     .           .
> ^     ^           ^
> |     |           |
> Z <- Z_V1 ... <- Z_Vn
> 
> 
> This could be implemented either with multiple inheritance (e.g.
> B_V1(B,A_V1)) or using the bridge design pattern |Z| times, one per
> each row. Both solutions would be acceptable; there are no ambiguities
> caused by the multiple inheritance (or they are resolved properly
> whenever they occur).
> 
> Now the problem is that there are 'holes' in this inheritance lattice:
> Not all versions introduced new variations of all types; for instance
> B_V5 could be missing, meaning that the most recent earlier version of
> B would be used in version 5 (say B_V2). My first thought was to create
> all the missing classes dynamically, but it's somewhat obscure and it
> may not be that simple. Is there a more elegant solution, either a
> general design pattern or some clever python metaprogramming hack ?
> 

Err, you might want to explain what these things do instead of an
abstract description of how you are doing it.  It looks like you are
using inheritance in the normal way _and_ you are using it to handle
versioning of some kind (maybe stable interface releases? I don't know).

Let us know what parts need inheritance for, and what you have
just been using a side effect of inheritance for as a convenience
(versioning, I think).

A more concrete example would be easier to comment on, if possible
do a simple one (maybe just two classes with two versions each).

-jackdied


From mrovner at propel.com  Wed Apr  6 00:25:12 2005
From: mrovner at propel.com (Mike Rovner)
Date: Tue, 05 Apr 2005 21:25:12 -0700
Subject: Does IronPython indicate MS interest in dynamic languages?
In-Reply-To: <yIadneprl6oqxc7fRVn-gw@wideopenwest.com>
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>	<1f7befae05040512422ef693d4@mail.gmail.com>	<mailman.1408.1112743462.1799.python-list@python.org>	<fnqbi2-p9c.ln1@lairds.us>
	<yIadneprl6oqxc7fRVn-gw@wideopenwest.com>
Message-ID: <d2vo7h$ca5$1@sea.gmane.org>

Thomas Gagne wrote:
> Assuming (I don't know for certain) that MS's PR approves all messages 
> that leave the building, I'm wondering if this foray into dynamic 
> languages doesn't signal something greater on MS' part.  While Sun and 
> Java (and C# for the most part) have remained statically-typed, do you 
> think IronPython might indicate a new direction for MS language 
> development?

Sun abandoned dynamic approach (Tcl) in favor of Java.
MS using dynamic for a long long time (recall prolog in NT loader).
So it's new step with .NET and prove that Python (as well as VBscript) 
will work well on it in is in best MS (read commercial) interests.

/m



From mfranklin1 at gatwick.westerngeco.slb.com  Wed Apr 27 02:50:19 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Wed, 27 Apr 2005 07:50:19 +0100
Subject: tkinter text width
In-Reply-To: <200504261701.22395.jstroud@mbi.ucla.edu>
References: <200504261701.22395.jstroud@mbi.ucla.edu>
Message-ID: <d4ncdb$iul$1@sea.gmane.org>

James Stroud wrote:
> Hello All,
> 
> I would like for a tkinter text widget to be aware of how big the frame that 
> contains it is, then I would like for it to reset its width to the 
> appropriate number of characters when this frame changes size.
> 
> I can get a cget("width") for the text, but this does not dynamically reflect 
> the visible width. 
> 
> One way I can think of is getting the size of the font used in the widget then 
> getting the width of the frame with cget then doing the appropriate math and 
> configuring the text widget upon resize events.
> 
> I'm thinking that there must be a more straightforward way.
> 
> Any ideas?
> 
> James
> 
> 

James,

Not sure I understand, do you want the text within the text widget to 
wrap or change font so it fits?  In any case to get a widgets width you 
will need to look at the winfo_* methods for that widget

pydoc Tkinter.Frame

<snip>

  |  winfo_height(self)
  |      Return height of this widget.
  |

<snip>

  |  winfo_reqheight(self)
  |      Return requested height of this widget.
  |
  |  winfo_reqwidth(self)
  |      Return requested width of this widget.

<snip>

  |  winfo_width(self)
  |      Return the width of this widget.
  |

If you do want the text to wrap there is the option to do this when you 
create the instance of the text widget:-


text = Text(root, wrap = "word") # word, char or none
text.pack()

Cheers
Martin



From merkosh at hadiko.de  Mon Apr 11 11:26:09 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Mon, 11 Apr 2005 17:26:09 +0200
Subject: singleton objects with decorators
Message-ID: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>

Hi,

I've been looking into ways of creating singleton objects. With Python2.3 I
usually used a module-level variable and a factory function to implement
singleton objects.

With Python2.4 I was looking into decorators. The examples from PEP 318
http://www.python.org/peps/pep-0318.html#examples

don't work - AFAIK because:
- you cannot decorate class definitions (why was it left out?)
- __init__ must return None


However, you can use the decorator:

def singleton(f):
    instances = {}
    def new_f(*args, **kwargs):
        if (f not in instances):
            instances[f] = f(*args, **kwargs)
        return instances[f]
    new_f.func_name = f.func_name
    new_f.func_doc = f.func_doc       
    return new_f

with a class that overwrites the __new__ methof of new-style classes:

class Foobar(object):
    def __init__(self):
        print self

    @singleton
    def __new__(self):
        return object.__new__(Foobar)


Is this particularly ugly or bad?

Thanks for comments,
Ciao
Uwe     


From mwm at mired.org  Mon Apr 25 01:22:32 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 00:22:32 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
Message-ID: <86u0lvph0n.fsf@guru.mired.org>

John Bokma <postmaster at castleamber.com> writes:
> Mike Meyer wrote:
>> John Bokma <postmaster at castleamber.com> writes:
>>> Mike Meyer wrote:
>>>> John Bokma <postmaster at castleamber.com> writes:
>>>>> Mike Meyer wrote:
>>>>>> Depends on the problem. If it's one of the things for which Python
>>>>>> has an obvious solution (sort a list; split a string on
>>>>>> whitespace; pull select list elements based on a criteria of some
>>>>>> kind; search a file for lines with a given word in them; etc.)
>>>>>> you'd get back the same answer from almost all of them.
>>>>> And what makes you doubt it would be different with Perl? :-D
>>>> Perl's "There's more than one way to do it" attitude.
>>> There's doesn't mean that you have to use or know them all. I think 
>>> every language here and there more ways to do something. And at a 
>>> broader scope, e.g. a simple algorithm, it doesn't matter that much 
>>> anymore.
>> Except that, as I said elsewhere, that having more than one way to do
>> it bloats the language processor
> do you really think that for / foreach and things like if / unless bloat 
> a language processor? I think you take your "pure programming lanuage" 
> way to far, and really don't understand your choice of Python in your 
> crusade.

I don't think I take it to far. All my experience dealing with
languages that took the opposite tack (i.e. - Perl and Common LISP)
demonstrate that such things are a bad idea.

Python got chosen for this discussion for two reasons. One, we're
posting in comp.lang.python. Two, part of the Python philosophy -
which you can get by doing "import this" - is:

There should be one-- and preferably only one --obvious way to do it.

>> and increases the semantic load on
>> the programmer. The best the programmer can do, as you imply, is to
>> ignore the extraneous methods.
> I am curious of a list of extraneous methods in Perl (more about the 
> size by the way)

Methods isn't a very good word choice on my part, as it has to many
meanings. But saying "extraneous ways to do it" is a bit wordy. I
already gave you one such list, covering just the syntactic elements
of the language.

>> Then the poor programmer has to puzzle
>> over them every time they show up in someone else's code.
> A poorly skilled programmer has to puzzle about a lot of more things. Or 
> you think list comprehension (sp?) and all the tricks with it are clear? 
> or the and or trick? I just had a glance on Python, but what probably to 
> you is one clear path isn't clear to me yet. And I doubt that can all be 
> blamed on unpure new Python.

Correct - newbies have to puzzle about a lot of things. A good
language design won't add to that set of things without a good
reason. Adding features because you can is adding things to puzzle
about without a good reason.

List comprehensions are part of that "new, unpure python". They
duplicate functionality that was already in the language. Of course,
they are a lot clearer than what was there, and if Python were a
research language rather than a production language, map, filter and
lambda would be gone.

>> No, one I blew. One you still got wrong.
> Which one?

Faling to put in the parens that would have distinguished the argument
lists from the list of operators.

Actually, it's not clear the grep was right either. The return value
of grep (and map) isn't always the right thing. You have to force the
return value into a list context to get the right result. Oh
well. Just one more thing for the programmer to worry about.

>>> If I could have a peek at the Perl code you maintained I could tell
>>> you (often by just seeing 3-5 lines) the status of the programmer who
>>> wrote it :-)
>> So you'd either say you were wrong, or that my second contention was
>> right. Either one would be a bad side effect of TMTOWTDI.
> I am right, and you are wrong ;-)

In which case, I'm right in claiming that having more than one way to
do things fragments the community - which is *still* a bad thing for
the people writing the language.

>>> Quite some people have been "tweaking" CGI scripts
>>> Quite some people "know" PHP, and hence consider themselves Perl 
>>> programmers.
>> 
>> Quite right. Neither is in the set of Perl things I maintain.
>
> Does that matter? What matters is what are the skills and background of 
> the Perl programmer who wrote the code you maintain.

They all come from different backgrounds, which is why they all use
different subsets of the language. Having a language that makes such
division of the community easy is a *bad* thing. Look at the history
of LISP to see why.

>>>> part of the grammar of the language, and are a recent addition. It's
>>>> not clear how Python should evolve with them added to the language.
>>> More fat: so I would say: learn to live with it. I only see
>>> advantages. If you want a minimal set of operations, I recommend
>>> programming ARM assembly, and don't go beyond ARM3 :-D.
>> 
>> You could also say more bloat. It's not a good thing. I don't want a
>> minimal set of operations; I want an orthogonal 1-1 coverage of
>> operations.
>
> ARM assembly, told you ;-)

That's not a coverage. Unless ARM assembly includes garbage
collection, dictionaries and similar things.

>>> seconds. Moreover, garbage collection gives newbies the impression
>>> that everything is handled automatically, and hence, they forget that
>>> other resources are less unforgiven, and *have to be* released.
>> 
>> Other resources are less forgivving only if they are badly
>> designed.
>
> Sure, a resource outside of your program that has certain limits is 
> badly designed. Yup, a database for example.

Nope, the resource is the interface to the database. If it's
well-designed, then you won't have to worry about shutting down the
connection. It'll get shut down when it's garbage collected.

>> That means they *should* be released, but not *have to be*
>> released.
> Trust me: they *have to be* released.

Then the interface is badly designed.

>> Consider the file type in Python. It'll be closed after
>> you're through with it, guaranteed. However, garbage collection isn't
>> triggered by running out of file descriptors, so you *should* close
>> them.
> Or otherwise?

Depends on how the garbage collector is implemented. In CPython, with
reference counting, the files will get closed as soon as the
descriptor is no longer referenced, and nobody will be any the
wiser. In Jython, which used the Java garbage collector, you can run
out of file descriptors, meaning your file opens will start failing. I
have no idea what IronPython does.

You *should* close the files. There are external conditions that make
not doing so perfectly safe. For instance, you could know your code
will only be run on CPython, or you could know that it will only be
run on platforms with many file descriptors and you only use a few.

As a program maintainer, I'll tell you the conditions will almost
certainly change in ways you don't expect, and you *should* close the
files.

>>> A beginner will find a way. A nice example is garbage collection, 
>>> beginners think they don't have to think. And then suddenly things
>>> pop up like: memory leaking, how are circular references handled, and
>>> oops, suddenly things like weak references are needed. Add, things
>>> like threading, and shared resources, resources that are limited in
>>> one way or another and I doubt programming has become easier, or less
>>> error prone.
>> 
>> Having dealt with memory leaks in C (and other such languages) for a
>> decade, I'd say programming is *much* easier than it would be if you
>> didn't have some form of garbage collection.
>
> Easier, sure. But does it turn beginners in rock solid programmers?

It means they never make errors like using free'd memory, or failing
to free allocated memory. So in that since, yes, they are rock solid.

>>> Has anyone ever did serious research to the number of bugs per 10k
>>> lines for several programming languages?
>> 
>> Yeah. The LISP community did some research on garbage collection
>> vs. explicit allocate/free a couple of decades ago. The explicit
>> allocate/free methodology was found to be noticably more bug
>> prone. Like I said, those date from a couple of decades ago, so I've
>> lost the reference and google didn't turn anything up.
>
> So they looked close at one aspect of the language. But you think that 
> 10k lines of, say Java, has less bugs then 10k lines of C?

Nah. Then again, counting lines of code is a silly thing to do. You
think 10K lines of C does as much as 10K lines of Java? The crucial
question isn't how many bugs you get per line of code, it's how many
bugs you get to achieve a given functionality. You can improve this
number by cutting down the number of bugs per line of code, or by
cutting down the number of lines of code needed to acheive a given
functionality. Modern programming environments clearly improve the
latter.

Of course, you can take terseness to far. Just ask anyone who's ever
written TECO or APL.

>>> I remember to have read that air bags makes people drive more
>>> reckless. I am quite convinced the same holds for programming
>>> languages. A language can't cover your behind, so to speak.
>> 
>> Could you provide examples of what kind of behavior you're talking
>> about? What would be the analog of "driving more reckless" given that
>> I've got a garbage collector?
>
> I already gave that one: forgetting to release resources which are not 
> unlimited.

And I already pointed out that if that's a serious problem, your air
bags are poorly designed. The wrapper around the resource should hide
that problem for you. Can you come up with another one?

>>> potential bugs is often equal to something people *think* a beginner
>>> is going to make.
>> 
>> Yes, but potential bugs even more often turn up in *real*
>> programs. I've fixed enough bogus pointer/using free'd memory/memory
>> leaks in C to know that.
>
> And I am sure that you fixed enough bugs in the same *real* programs 
> that were in no way related to this. I have fixed enough bugs in Perl, 
> Java, etc, to know that "life will find a way", so to speak.

We both agree you're always going to have bugs. I think that
programming languages designed to eliminate whole classes of bugs are
good thing, because bugs are a bad thing. You seem to argue that
because we can't elimnate all bugs, we shouldn't eliminate any. That's
simply silly.

>>> and if they are not hermits, they choose the ones they see the most 
>>> often used (unless it's Perl golf).
>> 
>> Which means they adopt to their subset of the community. Which means
>> that supporting code from another community will in practice require
>> learning a new programming language that happens to have a syntax they
>> are familiar with.
>
> What makes you think there are isolated communities?

Let's see. LISP - some of the communities were MacLISP, InterLISP,
Zeta LISP, and Standard LISP. There are certainly others I
forgot. Perl - they don't have names, they just show up in the code I
have to maintain. C++ - all I have is hearsay.

>> But
>> it does try to avoid that. It also tries to come with "batteries
>> included". You can get an aweful lot done in Python without ever going
>> to third party libraries. With Perl, you wind up going to CPAN for a
>> lot of things - which puts you back into TMTOWTDI land.
> How long haven't you been in touch with Perl? 

Oh, are you claiming that PERL ships with HTML and XML parsers, SMTP
clients and web servers in the standard library? That's odd - all the
packages I see seem to want to install those things from CPAN.

>> I want programming to be the professors route. I don't want to worry
>> about which for loop to use - I want there to be just one for loop, so
>> I take that one and *get on with solving the problem*. Having multiple
>> for loops (or other TMTOWTDI things) bloats the language
>> processor/library and increases the load on the programmer to no
>> benefit.
> I use either for or while. 

You never use the Perl foreach loop? That doesn't sound like a skilled
Perl programmer to me.

>> True. The WWW was extant when I learned Python, so I could learn it by
>> reading the documention on the web site, and looking through the
>> library. Perl, on the other hand, I had to learn from the
>> documentation that shipped with it, and the library that shipped with
>> it. Come to think of it, Python has a larger library than Perl as
>> well.
> How did you measure this? And which distribution of Perl are you talking 
> about?

By looking at the functionality installed programs used from third
parties (i.e. - CPAN in recent version) vs. what they used from the
standard library. And in Perl 4 and 5.

>>> Yes, most languages make it clumsy and frustrating. Perl is a rare 
>>> exception.
>> 
>> Right - Perl makes writing ugly,
> Nope, the programmer does that.

No, the programme writes the ugly code. Perl makes it easy.

>> slow code easy. Python makes it
>> hard. I think this makes python the superior language.
>
> And I think that there is the main problem in your whole story. You 
> think this is a quest for superiority. It isn't.

What? You're not trying to find the superior tool for the application
domain? Then what *are* you doing?

> But if this all bothers you *this* much, I am afraid that the problem is 
> really behind the keyboard :-)

No, what bothers me *this* much is that every time I have to maintain
a Perl program, I have to learn somebody else's subset/idioms/etc of
the language. "All this" is the cause of that.

>>>> After all, "You can write FORTRAN in any
>>>> language(*)". If I have to maintain the code, I'd *much* prefer that
>>>> the language make it hard to write ugly code, as I'm that much less
>>>> likely to get ugly code to maintain.
>>> Nonsense.
>> 
>> I make that claim based on experiene maintaing both Perl and Python
>> code. What basis do you have for calling it nonsense.
>
> If you are talking about maintaining your own code, maybe you are right. 
> But I claim that it's nonense that code written by other people, with 
> clearly different programming skills compared to the maintainer are a 
> PITA, no matter what language is used.

Yes, but the language influences how much of a PITA it is, and how
often it's a PITA. I prefer languages that make it less and infrequent
to languages that make it more and frequent.

>>>> TMTOWTDI makes it easy to write
>>>> ugly code. TOOWTDI makes it hard to write ugly code.
>>> And the funny thing is: it shouldn't matter to a skilled programmer.
>>> And an unskilled programmer will make up for the TOOWTDI restriction
>>> in more ways than you and I can imagine.
>> 
>> I don't agree. It doesn't say "There's one obvious to the skilled
>> programmer way to do it." It says "There's one obvious way to do it."
>
> Yup, to pick a tool out of a organized toolbox. Which is fine if that's 
> the only job involved. Programming, or as I see it, is not about picking 
> tools out of a box, but combining them.

Right. A good language will have an obvious tool for each part of the
combination, so you don't spend time worrying about picking the right
tools - the right choices are obvious. A bad language will have more
than one tool for many parts of the combination, so you wind up
wasting time on which of n interchangable tools is the right one
instead of actually solving the problem at hand.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From bogus@does.not.exist.com  Tue Apr  5 15:25:02 2005
From: bogus@does.not.exist.com ()
Date: Tue, 05 Apr 2005 19:25:02 -0000
Subject: (no subject)
Message-ID: <mailman.43.1572217922.3356.python-list@python.org>

#! rnews 1227
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: IronPython 0.7 released!
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
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Sender: hgg9140 at cola2.ca.boeing.com
Organization: The Boeing Company
References: <1111603770.909447.18070 at z14g2000cwz.googlegroups.com> <acidnWJnCsYDPc_fRVn-1g at wideopenwest.com>
Mime-Version: 1.0
Date: Tue, 5 Apr 2005 19:05:05 GMT
Xref: news.xs4all.nl comp.lang.python:370993

Thomas Gagne <tgagne at wide-open-west.com> writes:

> Does the Python community think Microsoft's embrace is a good or bad thing?
> 
> James wrote:
> > http://www.gotdotnet.com/workspaces/workspace.aspx?id=ad7acff7-ab1e-4bcb-99c0-57ac5a3a9742
> >

"Please refer to uploaded documentation for full text of the Shared
Source License for IronPython" says it all.

Shared Source is an abomination, complete with the risk of
cross-contaminating true OSS projects.  I wouldn't voluntarily use the
thing and I certainly wouldn't look at the source code.

-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From richard at zync.co.uk  Tue Apr 12 11:45:24 2005
From: richard at zync.co.uk (Richard Gration)
Date: Tue, 12 Apr 2005 15:45:24 +0000
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<F4CdnYojx8MiN8bfRVn-2w@comcast.com>
Message-ID: <pan.2005.04.12.15.45.23.858905@zync.co.uk>

On Tue, 12 Apr 2005 04:02:20 -0700, Joe Smith wrote:

> Xah Lee wrote:
> 
>> of motherf***ing irrevalent drivel?
> 
> I am greatly amused.
> A troll impersonating Xah Lee has made xah look like a total moron. LOL

"The fucking doc cannot be possibly fucking worsely written."

This is very Xahish though, even if it's not him.

It's right up there with "AND, the writting as usuall is fantastic
incompetent."


From hancock at anansispaceworks.com  Sat Apr 23 00:42:34 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 23:42:34 -0500
Subject: Run Unix shell command $ parse command line arguments in python
In-Reply-To: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>
References: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>
Message-ID: <200504222342.34455.hancock@anansispaceworks.com>

On Friday 22 April 2005 01:39 am, rkoida at yahoo.com wrote:
>      I am a newbie to python. I have a makefile which i can compile in
> UNIX/LINUX, But i
> I am planning to write a python script which actually does what my
> MAKEFILE does. The make file is
[...]
> I want to write a python script to replace this Makefile.
> I Have tried using getopt/optparse for parsing command line options
> How to Run  Unix shell command from python.

Read the documentation on the "os" and "popen2" modules under
"generic operating system services" in the Python Standard Library
Manual (go to http://www.python.org if you haven't already got this
manual on hand).

Cheers,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From gsakkis at rutgers.edu  Tue Apr 19 04:10:11 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 19 Apr 2005 01:10:11 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<mailman.2066.1113863546.1799.python-list@python.org>
Message-ID: <1113898210.973052.255840@l41g2000cwc.googlegroups.com>

Fran?ois Pinard wrote:

> The most useful place for implicit tuple unpacking, in my experience,
> is likely  at the left of the `in' keyword in `for' statements (and
> it is even nicer when one avoids extraneous parentheses).

... and would be nicest (IMO) if default arguments and *varargs were
allowed too; check http://tinyurl.com/dcb2q for a relevant thread.

George



From monografia at xfdgr.com  Mon Apr 25 21:03:20 2005
From: monografia at xfdgr.com (monografia )
Date: Tue, 26 Apr 2005 02:03:20 +0100
Subject: 7303 monografia monografias teses =?iso-8859-1?q?disserta=E7=F5es?=
 trabalhos escolares 7303
Message-ID: <DDAC168FB5C09749AD96D27804CA35D105AC6CC7@SETUBAL>

      Monografias completas a partir de 250,00 !


  monografia administra??o direito turismo economia letras pedagogia
  monografias teses  tese.

Sua monografia a partir de 250,00
http://monografiadireta.rg3.net








From jasoncorbett at gmail.com  Thu Apr 28 01:29:03 2005
From: jasoncorbett at gmail.com (jasoncorbett at gmail.com)
Date: 27 Apr 2005 22:29:03 -0700
Subject: Question about python code distribution...
In-Reply-To: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
References: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
Message-ID: <1114666143.824668.156850@g14g2000cwa.googlegroups.com>


draghuram at gmail.com wrote:
> Hi,
>
> I am sure that this question might have come up repeatedly. Companies
> may not want to distribute their python code in source form. Even
> though pyc files are one option, it gets inconvenient to distribute
> bunch of them . If there is some way to bundle pyc files (akin to
> .jar), it would be really nice. I understand that pyc files are not
> hard to decompile (from my reading of previous posts) and module
> startup times may be longer if they have to be read from an archive.
> Neverthless, an option to distribute in the form of an archive is
> attractive. Has this ever been considered for Python? If one were to
> consider it, what would be pros and cons of such approach?
>
> Any comments are appreciated.
>
> Thanks,
> Raghu.


As of version 2.3 of python zip files are supported:
http://www.python.org/doc/2.3.5/whatsnew/node5.html



From steve at holdenweb.com  Tue Apr  5 02:55:35 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 05 Apr 2005 02:55:35 -0400
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
Message-ID: <d2tcl6$rcj$1@sea.gmane.org>

Ron_Adam wrote:
> Ok, that post may have a few(dozen?) problems in it.  I got glitched
> by idles not clearing variables between runs, so it worked for me
> because it was getting values from a previous run.
> 
> This should work better,  fixed a few things, too.
> 
> The decorators can now take more than one argument.
> The function and arguments lists initialize correctly now.
> 
Ron:

I've followed your attempts to understand decorators with interest, and 
have seen you engage in conversation with many luminaries of the Python 
community, so I hesitate at this point to interject my own remarks.

In a spirit of helpfulness, however, I have to ask whether your 
understanding of decorators is different from mine because you don't 
understand them or because I don't.

You have several times mentioned the possibility of a decorator taking 
more than one argument, but in my understanding of decorators this just 
wouldn't make sense. A decorator should (shouldn't it) take precisely 
one argument (a function or a method) and return precisely one value (a 
decorated function or method).

> It doesn't work with functions with more than one variable.  It seems
> tuples don't unpack when given to a function as an argument.  Any way
> to force it?
> 
> 
> class Decorator(object):
[...]

Perhaps we need to get back to basics?

Do you understand what I mean when I say a decorator should take one 
function as its argument and it should return a function?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From vedanta.barooah at gmail.com  Fri Apr 22 15:36:56 2005
From: vedanta.barooah at gmail.com (Vedanta Barooah)
Date: Sat, 23 Apr 2005 01:06:56 +0530
Subject: Test mail please ignore
Message-ID: <c52b4e4c050422123651bbcb4b@mail.gmail.com>

-- 
*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*
Vedanta Barooah
YM! - vedanta2006
Skype - vedanta2006
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20050423/b8821e42/attachment.html>

From me at mkone.net  Wed Apr 13 04:10:04 2005
From: me at mkone.net (=?ISO-8859-15?Q?Martin_K=F6rner?=)
Date: Wed, 13 Apr 2005 10:10:04 +0200
Subject: email: Content-Disposition and linebreaks with long filenames
Message-ID: <d3ik62$4rm$1@beech.fernuni-hagen.de>

Hi NG,

I am using email module for creating mails with attachment (and then 
sending via smtplib).

If the name of the attachment file is longer than about 60 characters 
the filename is wrapped in the Content-Disposition header:

Content-Disposition: attachment;
	filename="This is a sample file with a very long filename
	0123456789.zip"


This leads to a wrong attachment filename in email clients - the space 
after "filename" is not shown or the client displays a special character 
(the linbreak or tab before 0123456789.zip).

If I use a standard email client and generate a mail with the same 
attachment, it creates the following header:

Content-Disposition: attachment;
  filename="This is a sample file with a very long filename 0123456789.zip"

(no line break)

Here is my code:


     msg = MIMEMultipart()
     msg['Subject']  = 'Test'
     msg['From']     = 'my at address'
     msg['To']       = 'my at address'
     msg.epilogue = ''

     # Add body
     part_body = MIMEText('blabla')
     msg.attach(part_body)

     # Add attachment
     file = 'This is a sample file with a very long filename 0123456789.zip'
     fp = open(file, 'rb')
     part_att = MIMEBase('application','zip')
     part_att.set_payload(fp.read())
     fp.close()
     part_att.add_header('Content-Disposition', 'attachment', filename=file)

     # Encode the payload using Base64
     email.Encoders.encode_base64(part_att)

     msg.attach(part_att)


Is it possible to prevent the linebreak?

Thank you
Martin


From richardblackwood at cloudthunder.com  Sun Apr 24 00:38:37 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 00:38:37 -0400
Subject: Variables
In-Reply-To: <d4f6hi$aq0$1@sea.gmane.org>
References: <426B0283.40602@cloudthunder.com>
	<d4f0op$kp$1@sea.gmane.org>	<426B083A.70104@cloudthunder.com>
	<d4f6hi$aq0$1@sea.gmane.org>
Message-ID: <426B22CD.60208@cloudthunder.com>

Terry Reedy wrote:

>"Richard Blackwood" <richardblackwood at cloudthunder.com> wrote in message 
>news:426B083A.70104 at cloudthunder.com...
>  
>
>>Indeed, this language is math.
>>    
>>
>
>In mathematics, the word 'variable' is generally an undefined meta-term 
>that is *notorious* for having multiple possible meanings and shades of 
>meaning.  One mathematician/linguist once claimed to have discerned 
>somewhere around 15 different meanings and shades thereof. <SNIP>
>
What is his/her name?



From jguerin at cso.atmel.com  Fri Apr  1 15:26:01 2005
From: jguerin at cso.atmel.com (Justin Guerin)
Date: Fri, 01 Apr 2005 13:26:01 -0700
Subject: how to close a gzip.GzipFile?
In-Reply-To: <200504011154.18640.jguerin@cso.atmel.com>
References: <200504011154.18640.jguerin@cso.atmel.com>
Message-ID: <200504011326.01621.jguerin@cso.atmel.com>

On Friday 01 April 2005 11:54, Justin Guerin wrote:
> Hello list,
>
> gzip documentation states that calling the .close() method on a GzipFile
> doesn't really close it.  If I'm really through with it, what's the best
> way to close it?  I'm using Python2.2 (but the gzip module doesn't seem
> to be any different from 2.4).
>
> Here's my code snippet, if it's relevant:
>
> oldfileobj= file(oldfile, 'r')
darn copy and paste, the above line should be 
oldfileobj= gzip.GzipFile(oldfile, 'rb')
> oldmd5 = md5.new()
> tellold = 0
> tellnew = 1
> while tellold != tellnew:
>     line = oldfileobj.readline()
>     tellold = tellnew
>     tellnew = oldfileobj.tell()
>     oldmd5.update(line)
>
>
> At this point, I'm finished reading the file, and would like to properly
> close it.  Should I just del oldfileobj?
>
> Also, while I'm asking, does anyone know a better way to iterate through
> a gzipped file?  The gzip module doesn't support iteration, nor
> xreadlines. I need to avoid reading the entire file contents into memory,
> so I can't use "for line in oldfileobj.readlines()"
>
> Thanks for the pointers.
>
> Justin Guerin


From ajikoe at gmail.com  Mon Apr 11 01:44:02 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 10 Apr 2005 22:44:02 -0700
Subject: Doubt regarding sorting functions
In-Reply-To: <mailman.1663.1113195016.1799.python-list@python.org>
References: <mailman.1663.1113195016.1799.python-list@python.org>
Message-ID: <1113198242.860647.69530@o13g2000cwo.googlegroups.com>

Basically you can sort after you put your data in your list:
L = [1.2,1.23,4.5,2]
L.sort()
print L

L = ["a","c","b","A","C","B"]
L.sort()
print L

Result:
[1.2, 1.23, 2, 4.5]
['A', 'B', 'C', 'a', 'b', 'c']

#------------------------------------------------------------
remember in character the "A" has lower ascii value then "a"

To model this as a function you just need this code for two of them:

def funcSort(myList):
  result = myList[:]
  result.sort()
  return result

Use of this function:
L = [1.2,1.23,4.5,2]
res1 = funcSort(L)
print res1

L = ["a","c","b","A","C","B"]
res1 = funcSort(L)
print res1
 

Best Regards,
Pujo



From bj_666 at gmx.net  Sat Apr  9 19:51:15 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 10 Apr 2005 01:51:15 +0200
Subject: Are circular dependencies possible in Python?
References: <IEosBE.GtB@bath.ac.uk>
Message-ID: <pan.2005.04.09.23.51.14.597138@gmx.net>

In <IEosBE.GtB at bath.ac.uk>, Tim Tyler wrote:

> Like C, Python seems to insist I declare functions before calling
> them - rather than, say, scanning to the end of the current script
> when it can't immediately find what function I'm referring to.

They don't have to be declared but to be *defined* in Python before you
can call them.  A ``def`` is executed in Python -- a function object is
given a name.  The content of a Python script is executed in the order the
code is written.

> C lets you predeclare functions to allow for the existence of
> functions with circular dependencies.
> 
> Does Python allow you to do something similar?

Yes, just define the function before it gets actually called::

  def func_a(n):
      if n > 5:
          return
      else:
          func_b(n + 1)

  def func_b(n):
          print n
          func_a(n + 1)

  func_a(0)

What happens here is

1. Define function A.  That function B doesn't exist by now is no problem
because it is not called yet.  There's just the instruction to call it if
the body of function A is executed.  *Then* function B has to exist.

2. Define function B.  You can swap both definitions without problems.

3. Function A is actually called and *must* exist at this point.

Ciao,
	Marc 'BlackJack' Rintsch


From bokr at oz.net  Thu Apr 14 00:56:32 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 14 Apr 2005 04:56:32 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<425d87d5.307229753@news.oz.net>
Message-ID: <425dc5bd.323077691@news.oz.net>

On Wed, 13 Apr 2005 21:52:45 GMT, bokr at oz.net (Bengt Richter) wrote:
[...]
>
>If you replace
>            a, a1 = 10L*(a%b), 10L*(a1%b1)
>with
>            a, a1 = 12L*(a%b), 12L*(a1%b1)
>
>and
>    sys.stdout.write(`int(d)`)
>with
>    sys.stdout.write('%X'%d`)
Typo, sorry ----------------^
that back-tick should not be there ;-/
>
>and run it, I think it will do what you want, even though I haven't worked through exactly
>what it's doing, though it's pretty. (For confidence I just tried it and decoded the result
>far enough to match math.pi exactly ;-)
>
>(the %X formats hex, but for single digits that's fine for base 12, giving A for 10 and B for 11.
>If you want bases >16 you'll have to use something like '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'[digitvalue])
>
>
BTW, I would make this into a base-parameterized generator, something like

 >>> def pigen(base=10, ndigits=True):
 ...     base = long(base)
 ...     k, a, b, a1, b1 = 2L, 4L, 1L, 12L, 4L
 ...     while ndigits:
 ...         # Next approximation
 ...         p, q, k = k*k, 2L*k+1L, k+1L
 ...         a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
 ...         # Print common digits
 ...         d, d1 = a/b, a1/b1
 ...         while d == d1:
 ...             yield int(d)
 ...             if ndigits is not True:
 ...                 ndigits -= 1
 ...                 if ndigits == 0: break
 ...             a, a1 = base*(a%b), base*(a1%b1)
 ...             d, d1 = a/b, a1/b1
 ...
 >>> def pidigits(base, ndigits=True, digchars='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'):
 ...     assert base>=2 and base <= len(digchars) and ndigits>=0
 ...     for d in pigen(base, ndigits):
 ...         yield digchars[d]

[ I just realized the original had tabs, so the above is fixed and pasted after the below ]
 ...
 >>> import sys
 >>> for d in pidigits(10, 60): sys.stdout.write(d)
 ...
 314159265358979323846264338327950288419716939937510582097494>>>
 >>>
 >>> print ''.join(d for d in pidigits(10,60)
 ...
 ... )
 314159265358979323846264338327950288419716939937510582097494
 >>> print ''.join(d for d in pidigits(10,60))
 314159265358979323846264338327950288419716939937510582097494
 >>> print ''.join(d for d in pidigits(12,60))
 3184809493B918664573A6211BB151551A05729290A7809A492742140A60
 >>> print ''.join(d for d in pidigits(26,60))
 33HIGBEBOHJHE3DB7DGJ6AK3G6JK8HND4G12A1IP8LGGL63C4BCK4NHE8G8O
 >>> print ''.join(d for d in pidigits(36,60))
 353I5AB8P5FSA5JHK72I8ASC47WWZLACLJJ9ZN98LTXM61VYMS1FRYTCI4U2
 >>> print ''.join(d for d in pidigits( 2,60))
 300100100001111110110101010001000100001011010001100001000110
 >>>
 >>> for d in pidigits(10): sys.stdout.write(d); sys.stdout.flush()
 ...
 314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211
 706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895
 493038196442881097566593344612847564823378678316527120190914564856692346034861045432664821339360
 726024914127372458700660631558817488152092096282925409171536436789259036001133053054882046652138
 414695194151160943305727036575959195309218611738193261179310511854807446237996274956735188575272
 489122793818301194912983367336244065664308602139494639522473719070217986094370277053921717629317
 675238467481846766940513200056812714526356082778577134275778960917363717872146844090122495343014
 654958537105079227968925892354201995611212902196086403441815981362977477130996051870721134999999
 837297804995105973173281609631859502445945534690830264252230825334468503526193118817101000313783
 875288658753320838142061717766914730359825349042875546873115956286388235378759375195778185778053
 217122680661300192787661119590921642019893809525720106548586327886593615338182796823030195203530
 185296899577362259941389124972177528347913151557485724245415069595082953311686172785588907509838
 175463746493931925506040092770167113900984882401285836160356370766010471018194295559619894676783
 74494482553797747268471040475346462080466842590694912933136770289891521047521Traceback (most rec
 ent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 3, in pidigits
   File "<stdin>", line 16, in pigen
 KeyboardInterrupt

To make a file for your friend,

 >>> open('pi12.txt','w').write(''.join(c for c in pidigits(12, 3003)))

That didn't take very long. No line breaks though. You can do that quick and dirty with

 >>> open('pi12by60.txt','w').write(
 ...         ''.join(c+'\n'[:(i+1)%60==0] for i,c in enumerate(pidigits(12, 3003)))+'\n')
 >>>

(adding the last EOL since we know 3003%60 =!0 ;-)
 
You could speed up the initial burst a lot, but after a while the data passing overhead is not
a significant part of the whole time.

Hm, ... that first digit still needs to be fixed for base <4 ;-)

Regards,
Bengt Richter


From msoulier at gmail.com  Wed Apr 27 10:43:28 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Wed, 27 Apr 2005 10:43:28 -0400
Subject: PyGTK vs. wxPython
In-Reply-To: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
Message-ID: <fb66056705042707432bf99c90@mail.gmail.com>

On 25 Apr 2005 08:56:23 -0700, dcrespo <dcrespo at gmail.com> wrote:
> Hi all...
> 
> I'm learning both, but at a slow step, so I want to know all the
> comments about this subject in this group.

Personally, I like pyGTK more because the docs are better. There's
nothing I hate more than trying to use an API that's poorly
documented, and wxPython's is horrid. The API docs are for C++ with an
occasional comment about Python, and the examples are all done with an
obsolete API that has since been updated.

I've found wxPython very frustrating for these reasons, whereas
PyGTK's docs are up-to-date and well done, easy to work with.

Maybe the wxPython people think their docs are good, but likely
they've forgotten how well they already know the API. They need to
take the time to update them.

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'


From gsakkis at rutgers.edu  Sat Apr  2 20:56:22 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 2 Apr 2005 17:56:22 -0800
Subject: Help with splitting
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
	<pan.2005.04.01.22.37.16.957649@jerf.org>
Message-ID: <1112493381.965950.89130@o13g2000cwo.googlegroups.com>

Jeremy Bowers wrote:
> On Fri, 01 Apr 2005 14:20:51 -0800, RickMuller wrote:
>
> > I'm trying to split a string into pieces on whitespace, but I want
to
> > save the whitespace characters rather than discarding them.
> >
> > For example, I want to split the string '1    2' into ['1','
','2'].
> > I was certain that there was a way to do this using the standard
string
> > functions, but I just spent some time poring over the documentation
> > without finding anything.
>
> importPython 2.3.5 (#1, Mar  3 2005, 17:32:12)
> [GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
> Type "help", "copyright", "credits" or "license" for more
information.
> >>> import re
> >>> whitespaceSplitter = re.compile("(\w+)")
> >>> whitespaceSplitter.split("1 2  3   \t\n5")
> ['', '1', ' ', '2', '  ', '3', '   \t\n', '5', '']
> >>> whitespaceSplitter.split(" 1 2  3   \t\n5 ")
> [' ', '1', ' ', '2', '  ', '3', '   \t\n', '5', ' ']
>
> Note the null strings at the beginning and end if there are no
instances
> of the split RE at the beginning or end. Pondering the second
invocation
> should show why they are there, though darned if I can think of a
good way
> to put it into words.

If you don't want any null strings at the beginning or the end, an
equivalent regexp is:

>>> whitespaceSplitter_2 = re.compile("\w+|\s+")
>>> whitespaceSplitter_2.findall("1 2  3   \t\n5")
['1', ' ', '2', '  ', '3', '   \t\n', '5']
>>> whitespaceSplitter_2.findall(" 1 2  3   \t\n5 ")
[' ', '1', ' ', '2', '  ', '3', '   \t\n', '5', ' ']


George



From davemw at gmail.com  Mon Apr  4 19:42:53 2005
From: davemw at gmail.com (David  Wilson)
Date: 4 Apr 2005 16:42:53 -0700
Subject: change extensions
In-Reply-To: <4251cef9@dnews.tpgi.com.au>
References: <4251cef9@dnews.tpgi.com.au>
Message-ID: <1112658173.497045.305020@f14g2000cwb.googlegroups.com>

Bob Then wrote:
> how can i change all files from one extension to another within a
direcory?

This should work:

import os

def change_exts(suffix, new_suffix, dir_name):
    for name in os.listdir(dir_name):
        if name.endswith(suffix):
            old_pathname = os.path.join(dir_name, name)
            new_pathname = old_pathname[:-len(suffix)] + new_suffix
            os.rename(old_pathname, new_pathname)



David.



From osv at javad.ru  Thu Apr 21 07:57:33 2005
From: osv at javad.ru (Sergei Organov)
Date: 21 Apr 2005 15:57:33 +0400
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com>
Message-ID: <d484fd$ch1$2@n6.co.ru>

Tim Daneliuk <tundra at tundraware.com> writes:

[...]

> Some HLLs almost have to have it by definition.  I cut my teeth as programmer
> writing for embedded realtime systems in a HLL (PL/M).  While you could,
> in theory, completely avoid 'goto' in a realtime environment, it would
> make all manner of practical programming problems kind of ugly to implement.
> BTW, all modern systems come complete with 'goto' implemented in
> *hardware* - they're called "interrupts".

Well, I'm writing for embedded realtime systems in C/C++ and have never
encountered a single need to use goto. Comparing interrupts to goto
doesn't make any sense for me either. For example, most architectures
have 'branch' *hardware* instructions that are much more close
equivalents to goto than interrupts are, but that doesn't justify use of
goto in high-level languages in any way.

-- 
Sergei.


From bokr at oz.net  Tue Apr  5 20:23:01 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 06 Apr 2005 00:23:01 GMT
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<424f04d0.137947037@news.oz.net>
	<f56u41lrl63ugehbc4merjh8cmdct1ska0@4ax.com>
	<1112500967.391604.289760@f14g2000cwb.googlegroups.com>
	<0mqu41pham7n91vb1qgtoe567unn1cffb6@4ax.com>
	<424f982c.175671582@news.oz.net>
	<mbtv419gsbdbt65mvvdv6dhqjm578plam5@4ax.com>
	<42506757.1010404@v.loewis.de>
	<e3s051p1dfqag3ph7h5f3292294lelk18p@4ax.com>
	<4251fba7.328610657@news.oz.net>
	<0d9551t2ulpdihk2v1vo2dqi53ltoqoitv@4ax.com>
Message-ID: <425311eb.399846008@news.oz.net>

On Tue, 05 Apr 2005 18:59:32 GMT, Ron_Adam <radam2 at tampabay.rr.com> wrote:

>On Tue, 05 Apr 2005 06:52:58 GMT, bokr at oz.net (Bengt Richter) wrote:
>
>>>Ok, yes, besides the globals, but I figured that part is obvious so I
>>>didn't feel I needed to mention it.  The function call works the same
>>>even though they are not nested functions.
>>
>>I am afraid that is wrong. But be happy, this may be the key to what ISTM
>>is missing in your concept of python functions ;-)
>
>The expression in the form of "function(args)(args)" is the same
>pattern in two "different" cases, which was all that I was trying to
>say.  Not that the exact process of the two different cases were the
>same. 
>
>>So, no, it does not "work the same." In fact, it is a misconception to talk about
>>a nested fee as if it existed ready to call in the same way as foo. It doesn't
>>exist that way until the fee def is EXECUTED, producing the callable fee.
>
>Ok, I'm going to have to be more careful in how I phrase things I
>think, I tend to over-genralize a bit. I said they were "the same",
>but meant similar, a mistake in wording, but not in my understanding. 
>
>But this is a good point. In my example the calling expression does
>not yet know who the next tuple of arguments will go to until foo
>returns it. That part is the same, but as you point out in a nested
>scope foo defines fee then returns it. And in the non nested example
>fee is already defined before foo is called.  And they must use
>globals to communicate because they are not share the same name space.
>They differ because fee is temporary, in the nested version, only
>existing until the expression foo(arg)(arg) is evaluated.  It never
>gets assigned a name in foo's parent name space. Do I have that
>correct?
I think so.
>
>
>>We can use dis to see the above clearly:
>
>Love the byte code walk through, Thanks.  Is there a resource that
>goes in depth on python byte code and the compiler?  I haven't been
>able to find much on it on google.
>
I don't know of anything other than the compiler and cpython sources.
The byte codes are not all the same from version to version, since
added language features may require new byte code operations, at least
for efficiency, and (as our postings here show ;-) explaining code
clearly is as much of a job as writing it. Fortunately, python code
is pretty readable, and there is a lot of interesting reading in

 Python-2.4xxx\Lib\compiler\ and Python-2.4xxx\Lib\compiler\

on your disk if you download the source installation. Lots of
other goodies as well like demo code etc.

>> >>> import time
>> >>> def globalfun(): return '[%s]'%time.ctime()
>> ...
>> >>> foo()
>> <function fee at 0x02EF802C>
>> >>> foo()(111, 222)
>> (111, 222)
>> >>> foo()(333)
>> (333, '[Mon Apr 04 22:31:23 2005][Mon Apr 04 22:31:23 2005]')
>> >>> foo()(333)
>> (333, '[Mon Apr 04 22:31:37 2005][Mon Apr 04 22:31:37 2005]')
>
>I like your idea of using time stamps to trace code! :)

Well, I wanted to emphasize the time dimension in creation and existence
of things, so I thought to tag them.

[...]
>I understand functions, sometimes it's difficult to describe just what
>it is I don't understand yet, and sometimes I fool myself by jumping
>to an invalid conclusion a little too quickly.  But I do this for
>enjoyment and learning, so I'm not constrained by the need to not make
>mistakes, (those are just part of learning in my oppinion), as I would
>if my job depended on it.  However it's a little frustrating when my
>inability to write well, gets in the way of expressing myself
>accurately.
I feel very much the same ;-)

>
>But a few questions remain...
>
>When a @decorator statement is found, How does the compiler handle it?
>
>Let me see if I can figure this out...using dis. :)
>
>>>> from dis import dis
>>>> def deco1(d1): return d1
>
>>>> def func1(f1):
>	@deco1
>	def func2(f2):
>		return f2
>	return func2(f1)
That last line is a bit strange, which leads to the strangeness
you ask about below.

>
>>>> func1(2)
>2
>
>>>> dis(deco1)
>  1           0 LOAD_FAST                0 (d1)
>              3 RETURN_VALUE        
>>>> dis(func1)
>  2           0 LOAD_GLOBAL              0 (deco1)
>              3 LOAD_CONST               1 (<code object func2 at
>00B45CA0, file "<pyshell#11>", line 2>)
>              6 MAKE_FUNCTION            0
>              9 CALL_FUNCTION            1
>             12 STORE_FAST               1 (func2)
>
>  5          15 LOAD_FAST                1 (func2)
>             18 LOAD_FAST                0 (f1)
>             21 CALL_FUNCTION            1
>             24 RETURN_VALUE        
>
>I'm not sure how to interpret this... Line 5 and below is the return
>expression. The part above it is the part I'm not sure about.

Well, it's showing the result of your python code, but the return func2(f1)
is obscuring normal decorator functionality. I suggest going from the simplest
and introducing complications stepwise. You are defining a func1 that could
be used as a decorator function, and it decorates its function argument by
explicitly calling an internally defined decorator function func2, whose internal
definition involved decorating func2 using func1. We can walk through it.
It's legal usage, it's just not the simplest example or clearest design ;-)

>
>Is the first CALL_FUNCTION calling deco1 with the result of the
>defined functions reference, as it's argument? Then storing the result
>of deco1 with the name func2?

Yes, if I understand you correctly.
I'll use list notation to represent the stack, so [] is empty and
[bottom, middle, top] is a stack with references to three things.
So _after_ each line above, we get

 0 -> [deco1]  This is a reference to the callable function deco1
 3 -> [deco1, <code object func2>] The top is what's necessary to make the func2 function
 6 -> [deco1, func2]  MAKE_FUNCTION pops its arg and pushes it result (func2)
 9 -> [func2*] CALL_FUNCTION 1 (one arg) called deco1(func2) and stacked the decorated func2
12 -> [] func2 reference popped from stack and stored in local func2
15 -> [func2*] local func2 (I use * to indicate it's the decorated func2) pushed on stack
18 -> [func2*, f1] stack the outer f1 argument. This is for your weird func2(f1) return value expression
21 -> [f1*] CALL_FUNCTION calls the decorated func2 with f1 as argument and stacks the modified f1
24 -> [] f1* (modified f1) is popped for return value

>
>If so the precompiler/parser is replacing the @deco1 with a call to
>the deco1 function like this.
>
>    deco1( (def func2(f2):return f2) )
>
>But this causes an illegal syntax error on the def statement. So you
>can't do it directly. Or is there yet another way to view this? :)
>
With simple examples? ;-)

One of the original examples of decorating was to replace the
staticmethod and classmethod function calls that had to be done
after the method defs. So the simplest view goes back to

    @deco
    def foo(): pass

being the equivalent (except if deco raises and exception) of

    def foo(): pass
    foo = deco(foo)

The plain name @deco was then allowed to become a simple   xxx.yyy(zzz,...) expression
returning a callable that would serve like the decorator function a bare name normally
referred to. And then the mechanism could be cascaded. I suggest looking at the
code for the simplest cascade of normal decorators. E.g., (putting the example in
the body of a function makes dis.dis easy ;-)

 >>> def deco_outer(f): return f
 ...
 >>> def deco_inner(f): return f
 ...
 >>> def example():
 ...     @deco_outer
 ...     @deco_inner
 ...     def foo(): pass
 ...

 >>> import dis
 >>> dis.dis(example)
   2           0 LOAD_GLOBAL              0 (deco_outer)  -> [deco_outer]
               3 LOAD_GLOBAL              1 (deco_inner)  -> [deco_outer, deco_inner]
               6 LOAD_CONST               1 (<code object foo at 02EE4FA0, file "<stdin>", line 2>) -> [deco_outer, deco_inner, <code obj>]
               9 MAKE_FUNCTION            0 -> [deco_outer, deco_inner, foo]
              12 CALL_FUNCTION            1 -> [deco_outer, foo*]  foo* == deco_inner(foo)
              15 CALL_FUNCTION            1 -> [foo**] foo** == deco_outer(foo*)
              18 STORE_FAST               0 (foo) -> []  foo = deco_outer(deco_inner(foo))
              21 LOAD_CONST               0 (None) # ignore ;-)
              24 RETURN_VALUE

I didn't return foo from example, so it generated code at 21 to return a None,
but you can ignore that, since the decoration ends with the binding of the function
name (foo here) done at 18 with STORE_FAST.

Regards,
Bengt Richter


From human47 at gmail.com  Fri Apr 15 01:20:00 2005
From: human47 at gmail.com (Sean)
Date: 14 Apr 2005 22:20:00 -0700
Subject: Rookie Question: Passing a nested list into a function?
In-Reply-To: <oIWdnebQUt6Tg8LfRVn-sw@comcast.com>
References: <oIWdnebQUt6Tg8LfRVn-sw@comcast.com>
Message-ID: <1113542400.391528.90760@g14g2000cwa.googlegroups.com>

Brett,

Hard to tell exactly what you're trying to do here, but it looks like
you'd be better served using one of the built in python data
structures.

For example: If you're trying to compare some elements of these
textfiles that are broken into titles, and contents for each file, try
something like:

myfiles = [ 'test.txt', 'test1.txt', 'test2.txt', 'test3.txt',
'test4.txt' ]
myfiledict = {}

for filename in myfiles:
    openfile = file(filename)
    myfiledict[filename] = [ line.strip() for line in
openfile.readlines()]
    openfile.close()
    # easier to read this way
    # self.content = []
    # for line in f.readlines():
    #     self.content.append(line.strip())


# then the contents of the file "test.txt" are accessable with the
expression:
# myfiledict['test.txt']

# if you make a few lists of files, then you can compare them like this

for k1, k2 in myfiledict, cmpfiledict:
    # if list == titlelist2[y][1]: From your code. The line below is
what
    # I think you want.
    if k1 == k2:
        # Whatever happens in your code that you've clipped.

If you post the rest of your code, or email me, then I'll be happy to
answer your question.

-S



From radam2 at tampabay.rr.com  Sun Apr  3 23:38:50 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Mon, 04 Apr 2005 03:38:50 GMT
Subject: Help me dig my way out of nested scoping
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
	<qdp051lr4029bs8rhs3mj2pkd17d4fouit@4ax.com>
	<1112570470.560599.223390@f14g2000cwb.googlegroups.com>
Message-ID: <2bb151tuq87tfm5hv6a64tb8jpa10hg6q8@4ax.com>

On 3 Apr 2005 16:21:10 -0700, "Brendan" <spam4bsimons at yahoo.ca> wrote:

>Thanks for the tips.  Making FW a callable class (choice 5) seems to be
>a good (if verbose) solution.  I might just wrap my temporary values in
>a list [lastX, lastA, lastB] and mutate them as Michael suggests.
>Thanks to Michael especially for the explanation of the name-binding
>process that's at the heart of the issue.
>
>The other choicess are not as helpful to me for the following reasons:
>
>choice 1: I don't want the temporary values of lastA and lastB to be
>global variables in my case as they are great big numeric arrays, and
>I'd like their memory to be reclaimed after FW is done.

Generally global variables should be avoided in python if you are
doing a large application.  For smaller ones, they are ok, but they
are just a little slower than local variables.

You could use a classic class which is a good way to store a single
group of data.  The 'del' will unbind a name from an object so the
objects can be garbage collected.

class data:
   A = []
   B = []

def countupdown():
    for n in xrange(11):
		data.A.append(n)
		data.B.append(10-n)
    print data.A
    print data.B

countupdown()

# store data  # Check out pickle module for this.

del data



>choice 2:  I tried this without success.  Using Micheal's example, I
>would assume you mean something like this:


def outer():
    def inner():
        outer.b += 1
        print outer.b

    inner()

outer.b = 1   # <-- initialize here after function of same name
outer()

# save data method here

del outer       # delete outer and it's attributes




From richardblackwood at cloudthunder.com  Sat Apr 23 22:26:56 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sat, 23 Apr 2005 22:26:56 -0400
Subject: Variables
In-Reply-To: <200504231930.12851.jstroud@mbi.ucla.edu>
References: <426B0283.40602@cloudthunder.com>
	<200504231930.12851.jstroud@mbi.ucla.edu>
Message-ID: <426B03F0.20400@cloudthunder.com>

Indeed, but is it not a variable? Is a variable in programming not 
merely a name associated with a value (which can changed over the course 
of code execution)?

James Stroud wrote:

>I think, strictly speaking, foo would be a "name" in python.
>
>  
>
>>>>foo
>>>>        
>>>>
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>NameError: name 'foo' is not defined
>
>
>
>On Saturday 23 April 2005 07:20 pm, so sayeth Richard Blackwood:
>  
>
>>To All:
>>
>>    Folks, I need your help. I have a friend who claims that if I write:
>>
>>foo = 5
>>
>>then foo is NOT a variable, necessarily. If you guys can define for me
>>what a variable is and what qualifications you have to back you, I can
>>pass this along to, hopefully, convince him that foo is indeed a variable.
>>
>>Thanks all!
>>
>>Richard B.
>>    
>>
>
>  
>


From ptmcg at austin.rr.com  Thu Apr  7 22:32:50 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 7 Apr 2005 19:32:50 -0700
Subject: text processing problem
In-Reply-To: <d34lm5$pfe$1@domitilla.aioe.org>
References: <d34a7f$gnd$1@domitilla.aioe.org>
	<1112915641.663333.175260@f14g2000cwb.googlegroups.com>
	<d34j31$nu6$1@domitilla.aioe.org>
	<1112922056.365893.307550@f14g2000cwb.googlegroups.com>
	<d34lm5$pfe$1@domitilla.aioe.org>
Message-ID: <1112927570.945167.224600@g14g2000cwa.googlegroups.com>

Maurice -

Here is a pyparsing treatment of your problem.  It is certainly more
verbose, but hopefully easier to follow and later maintain (modifying
valid word characters, for instance).  pyparsing implicitly ignores
whitespace, so tabs and newlines within the expression are easily
skipped, without cluttering up the expression definition.  The example
also shows how to *not* match "<X> (<X>)" if inside a quoted string (in
case this becomes a requirement).

Download pyparsing at http://pyparsing.sourceforge.net.

-- Paul
(replace leading '.'s with ' 's)

from pyparsing import *

LPAR = Literal("(")
RPAR = Literal(")")

# define a word as beginning with an alphabetic character followed by
# zero or more alphanumerics, -, _, ., or $ characters
word = Word(alphas, alphanums+"-_$.")

targetExpr = word.setResultsName("first") + \
............LPAR + word.setResultsName("second") + RPAR

# this will match any 'word ( word )' arrangement, but we want to
# reject matches if the two words aren't the same
def matchWords(s,l,tokens):
....if tokens.first != tokens.second:
........raise ParseException(s,l,"")
....return tokens[0]
targetExpr.setParseAction( matchWords )


testdata = """
This is (is) a match.
This is (isn't) a match.
I.B.M.\t\t\t(I.B.M. ) is a match.
This is also a A.T.T.
(A.T.T.) match.
Paris in "the(the)" Spring(  Spring  ).
"""
print testdata

print targetExpr.transformString(testdata)

print "\nNow don't process ()'s inside quoted strings..."
targetExpr.ignore(quotedString)
print targetExpr.transformString(testdata)

Prints out:
This is (is) a match.
This is (isn't) a match.
I.B.M.			(I.B.M. ) is a match.
This is also a A.T.T.
(A.T.T.) match.
Paris in "the(the)" Spring(  Spring  ).


This is a match.
This is (isn't) a match.
I.B.M. is a match.
This is also a A.T.T. match.
Paris in "the" Spring.


Now don't process ()'s inside quoted strings...

This is a match.
This is (isn't) a match.
I.B.M. is a match.
This is also a A.T.T. match.
Paris in "the(the)" Spring.



From jeff_barish at earthlink.net  Mon Apr 25 22:46:06 2005
From: jeff_barish at earthlink.net (Jeffrey Barish)
Date: Mon, 25 Apr 2005 20:46:06 -0600
Subject: Import DiscID on Windows
Message-ID: <d4k9nn$ra0$1@sea.gmane.org>

Has anyone gotten DiscID (and CDDB) to work on Windows?  I installed
python2.4 and CDDB-1.4 on Win98SE.  When I import DiscID I get

DLL load failed: One of the library files needed to run this application
cannot be found.

Python is complaining about mci.dll.  It is surely finding it because it
is in the search path, so I presume that there is something wrong with
the dll.  Any suggestions?  Can Python import a file with a dll
extension?
-- 
Jeffrey Barish



From python-url at phaseit.net  Mon Apr 25 12:25:57 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 25 Apr 2005 16:25:57 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 25)
Message-ID: <mailman.2533.1114537968.1799.python-announce-list@python.org>

QOTW: "Sure, but what about the case where his program is on paper tape and
all he has for an editor is an ice pick?" - Grant Edwards

"And in this case, you get improved usability *and* improved speed at the
same time. That's the way it should be." - Fredrik Lundh


    The Simplest Possible Metaclass:
        http://orbtech.com/blog/simplemetaclass
        
    Enumerating formatting strings:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/315099737b139c5e
        
    Andrew Dalke continues to produce interesting articles at a frankly
    preposterous rate. A selection, covering tracing python code, using
    XML-RPC, screen scraping, parsing and statistics:
        http://www.dalkescientific.com/writings/diary/archive/2005/04/20/tracing_python_code.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/21/using_xmlrpc.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/21/screen_scraping.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/22/parsing.html
        http://www.dalkescientific.com/writings/diary/archive/2005/04/22/statistics.html

    Wing 2.0.3 is available:
        http://wingware.com/pub/wingide/press/2.0.3-release.html

    Why does Python slicing work the way it does?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/947866ec21512405
        
    Another Python tool from Google; this one a MySQL status monitor:
        http://goog-mmaim.sourceforge.net/
        
    Processing XML one 'record' at a time:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/4b5f06d837a0e20b
        
    GOTO hell:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/832906c6122dc137
        
    Launching a subprocess without a console window on Windows:
        http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/409002
        
    Python or PHP? Duh!
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6d65bbac956ebbb0
        

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

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sponsor the "Python-URL!" project.




From jstroud at mbi.ucla.edu  Wed Apr 27 14:07:29 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 27 Apr 2005 11:07:29 -0700
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
Message-ID: <200504271107.29943.jstroud@mbi.ucla.edu>

Oops, last one had a typo:


a = ['bob', 'greg', 'cindy', 'alice']
b = ['fred','barney','betty','wilma','pebbles','bambam']
c = ['jed', 'granny', 'jethro', 'ellie-mae']
d = ['bob','carol','ted','alice']

e = [a,b,c,d]

for ary in e:
  print ary

e.sort(lambda x,y:cmp(x[1],y[1]))

for ary in e:
  print ary

e.sort(lambda x,y:cmp(x[0],y[0]))

for ary in e:
  print ary

James

On Wednesday 27 April 2005 10:34 am, so sayeth googleboy:
> I didn't think this would be as difficult as it now seems to me.
>
> I am reading in a csv file that documents a bunch of different info on
> about 200 books, such as title, author, publisher, isbn, date and
> several other bits of info too.
>
> I can do a simple sort over the first field (title as it turns out),
> and that is fine as far as it gets:
>
>
> import string
>
> bookData = open(r'D:\path\to\books.csv', 'r')
> sBookData = bookData.read()
> lBooks = string.split(sBookData, '\n')
>
> lBooks.sort()
> sorted = string.join(lBooks, '\n')
> output = open(r'D:\path\to\output.csv', 'w')
> output.close()
>
>
> I really want to be able to sort the list of books based on other
> criterium, and even multiple criteria (such as by author, and then by
> date.)
>
> I am using python 2.4 and have found this site:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305304
>
> and so I tried doing things like
>
> >>>lBooks.sort(cmp=cmp5)
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> NameError: name 'cmp5' is not defined
>
> (I was hoping that cmp5 meant it would use the 5th item in the lists to
> sort across)
>
> >>> lBooks.sort(key=lambda i:i[4])
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "<interactive input>", line 1, in <lambda>
> IndexError: string index out of range
>
>
> (I was hoping for similar things)
>
>
> would you be so kind as to point me in the right direction?
>
> THanks!
>
> googleboy

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

http://www.jamesstroud.com/


From ods at strana.ru  Thu Apr 28 03:46:40 2005
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 28 Apr 2005 11:46:40 +0400
Subject: urllib2 file upload error
In-Reply-To: <20050428034352.4F57237025@mail.tintz.co.nz>
References: <20050428034352.4F57237025@mail.tintz.co.nz>
Message-ID: <20050428114640.79f0b0e4.ods@strana.ru>

On Thu, 28 Apr 2005 15:45:50 +1200 Thomas wrote:

T> d = [ ('cmd', 'add-item'),
T>       ('protocol_version', '2.1'),
T>       ('userfile', open(FILE)),
T>     ]
T> req = urllib2.Request(URL, d)
[...]
T> TypeError: sendall() argument 1 must be string or read-only buffer,
T> not list

Exactly as error message states: the second argument to Request must be
string, not list.  You have to encode the body manually.

T> Tried the script from
T> http://fabien.seisen.org/python/urllib2_multipart.html
T> also
T> Getting similar error..

Are you sure you imported urllib2_file?

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]


From could.net at gmail.com  Tue Apr 19 05:16:43 2005
From: could.net at gmail.com (could ildg)
Date: Tue, 19 Apr 2005 17:16:43 +0800
Subject: Why does python class have not private methods? Will this never
	changed?
Message-ID: <311b5ce105041902165a0969a0@mail.gmail.com>

Python is an oop language,
but why does it hava not private methods?
And it even has not real private fields.
Will this never changed?
Private stuff always makes programming much easier.
-- 
????????????????????
????????????????
????????

From jerf at jerf.org  Fri Apr  1 16:52:52 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 16:52:52 -0500
Subject: try / except not worknig correctly
References: <1110673238.589776.40870@l41g2000cwc.googlegroups.com>	<mailman.334.1110675188.1799.python-list@python.org>	<1110675977.831462.17830@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.03.13.01.47.43.367660@jerf.org>

On Sat, 12 Mar 2005 17:06:17 -0800,
'@'.join([..join(['fred','dixon']),..join(['gmail','com'])]) wrote:

I'd also suggest

validInput = "ABCDEFGHIJKL" # and there are more clever ways to do this,
                            # but this will do

myInput = raw_input(" ".join(validInput) + "?")
if len(myInput) != 1:
	# do whatever
	pass
if myInput not in validInput:
	raise ValueError("Input not in legal input: " + validInput)


Obviously not a drop-in replacement for your code, but ought to clean it
up a little. 


From dan at dontspammecauseidontlikit.com  Thu Apr  7 22:34:43 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Fri, 08 Apr 2005 10:34:43 +0800
Subject: Sockets
Message-ID: <36qb5199613lai084brifj8judpoummv6n@4ax.com>




I'm using the socket module and have run into a problem.

I want to send binary data over the connection.  With C, this is easy:

write(sock_fd, data, length);

But it appears that the Python socket module has no method to send
binary data, it only sends strings.  So there's no argument to tell it
the length, it stops when it gets the end of string character (null).

The only way I can see around it is to encode the data, but this is
really just an inelegant hack.

Any suggestions?  Python is still new to me and I can't say that I've
mastered all its nuances.

Dan



From ivanlan at pauahtun.org  Tue Apr  5 19:34:05 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 05 Apr 2005 17:34:05 -0600
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
Message-ID: <4253206D.3A505A24@pauahtun.org>

Hi All--

Aahz wrote:
> 
> Use vim.  80% of the power of emacs at 20% of the learning curve.
> 

I think Aahz has it dead on.  Umpty-mumble years ago I spent six weeks
learning emacs lisp and customizing emacs until it did EXACTLY what I
wanted.  It was a great user interface, logical, consistent,
orthagonal.  It had only one thing wrong with it; it depended on
hardware keyboard features that PC keyboards don't have.

It would have taken me six weeks to retrain myself to the standard emacs
interface, so I used vi.  When vim became available, I switched to
that.  There's a good book available for vim:

http://www.amazon.com/exec/obidos/ASIN/0735710015/qid=1112743931/sr=2-1/ref=pd_bbs_b_2_1/102-7196910-2449750

It's excellent; even the index is useful, which is more than I can say
for 80% of the O'Reilly books out there, much as I love 'em.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From roy at panix.com  Wed Apr 20 09:32:04 2005
From: roy at panix.com (Roy Smith)
Date: Wed, 20 Apr 2005 09:32:04 -0400
Subject: exception handling
References: <mailman.2170.1114000426.1799.python-list@python.org>
Message-ID: <roy-1CE868.09320420042005@reader1.panix.com>

Mage <mage at mage.hu> wrote:

>        Hello,
> 
> 
> def error_msg(msg):
>     sys.exit(msg)
> 
> try:
>     do_something()
>     if value != my_wish:
>        error_msg('Invalid input')
> except:
>     print "Fatal IO or Network error"
> 
> This doesn't work because sys.exit raises an exception.

Peter Otten posted a good way to do what you want, but I'm not convinced 
that it's a good idea.

You're assuming that any exception you get will be a "Fatal IO or Network 
error".  What if it's not?  What if do_something() raises FutureWarning, or 
KeyboardInterrupt, or AssertionError, or DeprecationWarning, or anything 
else which has nothing to do with IO or networks?  You would just end up 
producing a misleading error message.

If you expect do_something() will throw certain exceptions, catch them 
specifically.  It's usually a mistake to catch everything.  It's certainly 
a mistake to catch everything and assume you know what it must be.

Try running the following code and see what happens:

import traceback

def do_something():
    pass

try:
    do_something()
    if value != my_wish:
        error_msg('Invalid input')
except:
    print "Fatal IO or Network error"
    print traceback.print_exc()


From sean_mcilroy at yahoo.com  Mon Apr  4 01:54:17 2005
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 3 Apr 2005 22:54:17 -0700
Subject: the bugs that try men's souls
References: <1112515167.251511.116960@o13g2000cwo.googlegroups.com>
	<1112534521.797702.53630@l41g2000cwc.googlegroups.com>
Message-ID: <e5063e96.0504032154.2e9d7b20@posting.google.com>

"Jordan Rastrick" <jrastrick at student.usyd.edu.au> wrote in message news:<1112534521.797702.53630 at l41g2000cwc.googlegroups.com>...

<snip>

Wow. I'd resigned myself to the task of reformulating my question in
an intelligent way, I stopped by just to leave a little note to the
effect that the thread wasn't dead, and I find out the question's been
answered. Thanks very much. I'll let you know how it turns out.

Peace,
Sean


From radam2_ at _tampabay.rr.com  Mon Apr 18 11:48:25 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Mon, 18 Apr 2005 15:48:25 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
	<Pine.A41.4.61b.0504171418560.232474@dante76.u.washington.edu>
	<3r2661ltasoktjlgtvp3v03osb372b15j2@4ax.com>
	<Pine.A41.4.61b.0504171920010.34498@dante69.u.washington.edu>
Message-ID: <eve761hv7vjktfppqb51eigi9otl0fldh6@4ax.com>

On Sun, 17 Apr 2005 19:56:10 -0700, Brian Sabbey
<sabbey at u.washington.edu> wrote:

>I also wouldn't do it that way.  I don't see a class as being much better, 
>though.  If I understand you correctly, with classes you would have 
>something like:
>
>p = Pickled('pickled.txt')
>p.load()
>p.data.append('more data')
>p.data.append('even more data')
>p.dump()

The load and dump would be private to the data class object. Here's a
more complete example.  

import pickle
class PickledData(object):
	def __init__(self, filename):
		self.filename = filename
		self.L = None
		try:
			self._load()
		except IOError:
			self.L = []
	def _load(self):
		f = open(self.filename, 'r')
		self.L = pickle.load(f)	
		f.close()
	def _update(self):
		f = open(self.filename, 'w')
		pickle.dump(self.L, f)
		f.close()			
	def append(self, record):
		self.L.append(record)
		self._update()
	# add other methods as needed ie.. get, sort, clear, etc...

pdata = PickledData('filename')

pdata.append('more data')
pdata.append('even more data')

print pdata.L
['more data', 'even more data']


>This has the same issues as with opening and closing files:  losing the 
>'dump', having to always use try/finally if needed, accidentally 
>re-binding 'p', significantly more lines.  Moreover, class 'Pickled' won't 
>be as readable as the 'pickled_file' function above since 'load' and 
>'dump' are separate methods that share data through 'self'.

A few more lines to create the class, but it encapsulates the data
object better. It is also reusable and extendable.

Cheers,
Ron

>The motivation for thunks is similar to the motivation for generators-- 
>yes, a class could be used instead, but in many cases it's more work than 
>should be necessary.
>
>-Brian




From sutram at gmail.com  Fri Apr 15 17:05:21 2005
From: sutram at gmail.com (Mahesh)
Date: 15 Apr 2005 14:05:21 -0700
Subject: Python 2.4.1 hang
In-Reply-To: <mailman.1983.1113596502.1799.python-list@python.org>
References: <1113595275.615168.189790@o13g2000cwo.googlegroups.com>
	<mailman.1983.1113596502.1799.python-list@python.org>
Message-ID: <1113599121.338326.117500@o13g2000cwo.googlegroups.com>

Yes, it is stupid but I am debugging some poorly written C++ code so I
cannot change it. It was easier for me to use python to try various
combinations (since the C++ code uses a non-standard re engine). I just
chanced upon the problem and was curious as to what Python was up to.

Thanks for clearing that up.



From rkern at ucsd.edu  Sun Apr  3 18:46:46 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 03 Apr 2005 15:46:46 -0700
Subject: Question about the Python Cookbook: How much of this is new?
In-Reply-To: <1112567138.365571.129840@l41g2000cwc.googlegroups.com>
References: <1112567138.365571.129840@l41g2000cwc.googlegroups.com>
Message-ID: <d2prom$mj7$1@news1.ucsd.edu>

RickMuller wrote:
> I had a question about the second edition of the Python Cookbook. I own
> and have thoroughly enjoyed the first edition of the Python Cookbook.
> How much of the second edition is new? Is this "essential reading" if I
> already have the first edition? I realize that there are new sections
> that describe language features through Python 2.4, but is this, say,
> 10% of the book (in which case I won't buy a new copy) or is it >25% of
> the book (in which case I will). The Chapter (#3) on Time/Money that's
> posted on the O'Reilly website is great (and entirely new, if memory
> serves).

Quoting Trent Mick, who answered this question in another thread:

"""Here is an excerpt from the preface (typing errors are mine):

     If you already own the first edition, you may be wondering whether
     you need this second edition, too. We think the answer is "yes." The
     first edition had 245 recipes; we kep 146 of those (with lots of
     editing in almost all cases), and added 192 new ones, for a total of
     338 recipes in this second e4dition. So, over half of the recipes in
     this edition are complete,ly new, and all the recipes are updated
     to apply to today's Python -- releases 2.3 and 2.4. Indeed, this
     update is the main factor which lets us have almost 100 more recipes
     in a book of about the same size. The first edition covered all
     versions from 1.5.2 (one sometimes earlier) to 2.2; this one focuses
     fimly on 2.3 and 2.4. Thianks to the greater port of today's Python,
     and, even more4, thanks to the fact that this edition avoids the
     "historical" treatises about how you had to do things in Python
     versions releases 5 or more years ago, we were able to provide
     substantially more currently relevant recipes and information in
     roughtly the same amount of space.

Trent
"""

So yeah, buy it.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From finite.automaton at gmail.com  Thu Apr 28 14:48:25 2005
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 28 Apr 2005 11:48:25 -0700
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
	<1114710873.292998.128090@f14g2000cwb.googlegroups.com>
Message-ID: <1114714105.582253.12150@f14g2000cwb.googlegroups.com>

> I'd be just such a newbie; I don't understand why it would matter if
I
> left the book instance referencing itself....

It's just kind of sloppy and unnecessary to have self.self

> firstly,  I am trying hard to figure out how to create a new file
with
> the list rather than print to standard out.  I haev done this:

I think you want 'a' instead of 'w+' as the file's mode.  You can also
open and close the file outside of the loop; it would be more
efficient.

> Secondly,  I am wondering how I can get a search algorithm that will
> search by multiple fields here,  so that I can (as one example) sort
> the books out by author and then date,  to present a list of the book
> grouped by authors and having each group presented in a chronological
> order,   or by author and title, grouping all the books up into
authors
> presenting each group alphabetically by title.  Or by publisher and
> date,  or by publisher and code....

So far, we've been using the "key" parameter of list.sort.  If you want
sort criteria more complicated than a single attribute, you can sort
based on a custom comparison function.    Comparison functions compare
two objects (let's call them A and B), and return one of three possible
values:

A is greater than B  => 1
A is less than B => -1
A and B are equal => 0

The built-in function "cmp" can be used to compare objects; behavior is
defined for built-in types:

cmp(0, 1) => -1
cmp("Zylophone", "Abstract") => 1   # alphabetical ordering for strings
cmp( [1,2,3], [1,2,3] ) => 0  # compare sequence elements from left to
right

So another way to do a sort-by-author for your books would be:

  def compare_authors(book1, book2):
      return cmp(book1.author, book2.author)

   books.sort(compare_authors)

A more complicated comparison function might nest two others:

  def compare_dates(book1, book2):
      # Assuming that your dates are either numerical or are strings
for which
      # alphabetical sorting is identical to chronological...
      return cmp(book1.date, book2.date)

  def compare_author_and_date(book1, book2):
       different_authors = compare_authors(book1, book2)
       if different_authors:  # different authors
           return different_authors
       else:  # same author.  sort by date.
           return compare_dates(book1, book2)
  
  books.sort(compare_author_and_date)



From ville at spammers.com  Sat Apr 23 11:07:04 2005
From: ville at spammers.com (Ville Vainio)
Date: 23 Apr 2005 18:07:04 +0300
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<UMqae.2015$Cz3.264034@monger.newsread.com>
Message-ID: <du7zmvppm5j.fsf@lehtori.cc.tut.fi>

>>>>> "Leif" == Leif K-Brooks <eurleif at ecritters.biz> writes:

    Leif> Lad wrote:
    >> Is anyone capable of providing Python advantages over PHP if there are
    >> any?

    Leif> Python is a programming language in more ways than simple Turing
    Leif> completeness. PHP isn't.

+1 QOTW.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From hancock at anansispaceworks.com  Fri Apr 22 10:30:56 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 09:30:56 -0500
Subject: Regular Expressions - Python vs Perl
In-Reply-To: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
Message-ID: <200504220930.56954.hancock@anansispaceworks.com>

On Thursday 21 April 2005 09:01 am, codecraig wrote:
>   I am interested in regular expressions and how Perl and Python
> compare.  Particulary, I am interested in performance (i.e. speed),
> memory usage, flexibility, completeness (i.e. supports simple and
> complex regex operations...basically is RegEx a strong module/library
> in Python?)

Understand that I have used regexes very very little in Perl (I took a
class, that's about it).  However, I have translated a couple of Perl modules
into Python.

I find that Perl programmers use the rather opaque "regex style" much
too often, so that I usually replace several regexes with simple string
searches, e.g.

original program:     uses regex to match /.*foo.*/
python translation:  just use s.find('foo')

That's not really for performance reasons (though it probably is faster?),
but because it just makes it clearer what you're trying to do.

OTOH, some of the regexes will be "real" regexes, in which case
Python's way of expressing regexes as strings makes things a whole
lot clearer, e.g.:

junk = r'.*'
word = r'\b\w+\b'
domain = r'(%s\.)*%s' % (word,word)
re_mail = re.compile(junk + word + '@' + domain + junk )

Although, of course, you can just write:

re_mail = re.compile(r'.*\b\w+\b@(\b\w+\b.)*\b\w+\b.*')

Which is shorter, but frankly, I had a hard time just keeping it straight to
type it here --- I think the first version was actually faster to write, even if
it takes up more space.  Also, I screwed up on the first time when I wrote
the regex for a word (forgot the '+'), so having it factored out like this made
it faster to fix the mistake.

Which is still a dumb example, but you can see what I mean about making
the code easier to read / refactor.  AFAIK, Perl does not make this particularly
easy.

Python regexes probably allow almost, but not quite all, of what Perl
regexes do (I think the current Python regex language is pretty much
identical with the one in Perl 5, but some newer features are in the most
cutting-edge Perl release, IIRC).

For all but the simplest jobs, Python regexes should be compiled, as I
do above. In fact, I just never bother with using them directly --- I think
the regex will get compiled when used, even if you don't do it explicitly,
and the explicit compiled regex can be stored for multiple uses, etc.

Although it wouldn't surprise me to learn that Perl's regex engine is
slightly more optimized (seeing as it is used so much), I wouldn't want
to bet on it. I doubt you'll notice any difference even if one exists, and
the speedup from eliminating regexes where they don't belong would
probably wipe it out anyway.

>   Anyone have any information on this?  Any numbers, benchmarks?

No benchmarks, sorry.  I don't care enough about the speed. But  I do
feel that Python regexes are both clearer and more flexible.  They encourage
code re-use and self-documentation.  And they can pretty much do whatever
their Perl equivalents can.

OTOH, Python programmers do not love them the way Perl programmers
do.  So they are used less.  This is not least because Python has a lot of
very powerful higher-level string manipulation tools.

> Thanks so much.  I know this is a python user group...but try to be has
> un-biased as you can.

Can't claim to be unbiased, sorry. ;-)

Cheers,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From tim.peters at gmail.com  Thu Apr  7 13:59:06 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 7 Apr 2005 13:59:06 -0400
Subject: sorting a list and counting interchanges
In-Reply-To: <7xvf6yzflz.fsf@ruckus.brouhaha.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mailman.1479.1112871689.1799.python-list@python.org>
	<7xvf6yzflz.fsf@ruckus.brouhaha.com>
Message-ID: <1f7befae0504071059492a9d57@mail.gmail.com>

[Paul Rubin]
> Writing a sorting function from scratch for this purpose seems like
> reinventing the wheel.

Yup!  list.sort() is going to be mounds faster.

> Tim's answer of simply counting the cycles (without having to pay
> attention to their length) is really clever.  I didn't realize you could do
> that.

It's a standard trick; see, e.g., Nijenhuis & Wilf's "Combinatorial
Algorithms" -- although it can be hard to extract the _sense_ out of
clever Fortran <0.7 wink>.

> Proving it is a cute exercise.  Hint: any cycle of odd length has an even
> number of swaps, and any cycle of even length has an odd number of swaps
> (another exercise).

More precisely, a cycle of length c can be written as the product of
c-1 transpositions.  If the permutation is the product of m disjoint
cycles of lengths c_1, c_2, ..., c_m, then decomposing those into
transpositions gives a total number of transpositions:

    (c_1-1) + (c_2-1) + ... + (c_m-1) =  [rearranging and combining the m 1's]
    (c_1 + c_2 + ... + c_m) - m = [each element appears exactly once in
                                                one cycle, since the
cycles are disjoint]
    number_of_elements - m

which the code spelled

    n - num_cycles

I think it's harder for some people to see why the

    assert j not in seen

must be true, although that's obvious after just a few hours' thought <wink>.


From sidharth.kuruvila at gmail.com  Fri Apr  8 08:43:42 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Fri, 8 Apr 2005 18:13:42 +0530
Subject: compound strip() string problem
In-Reply-To: <hQu5e.3927$5F3.3909@news-server.bigpond.net.au>
References: <hQu5e.3927$5F3.3909@news-server.bigpond.net.au>
Message-ID: <2ab2ed55050408054326dcdcca@mail.gmail.com>

The time module has a function called 'strftime' which can retyrn the
time in the the format you want to. So you really don't need to parse
the string returned by asctime the way you are doing.


On Apr 8, 2005 6:01 PM, Dylan Wilson <goandspamyourself at doamin.com> wrote:
> Hi,
> I'm new to python and i have a string problem.
> My problem is this
> --------------------------------------------------------------------------
>  >>>import time
>  >>>time = time.asctime()
>  >>>time
> 'Fri Apr 08 22:14:14 2005'
>  >>>ti = time[0:13]
>  >>>me = time[14:16]
>  >>>time = ti + me
>  >>>time
> 'Fri Apr 08 2214'
> --------------------------------------------------------------------------
> Now i need to compond that string remove the whitespace if you will.Well
> i read up on strip(), lstrip() and rstrip() and all i could deduce was
> that they striped the whitespace from the start and/or end of the
> string.But I tried that anyway and failed.Is there an easier way than i
> did it below? I'm sorry it's ugly and tedious.
> --------------------------------------------------------------------------
> #!/bin/bash/env python
> 
> import os, time
> 
> #Figure out what os this is
> platform = os.name
> 
> #Create string with date, time and extension for our pcap file
> ext = '.out'
> time = time.asctime()
> ti = time[0:13]       #
> me = time[14:16]     #
> time = ti + me      #There has to be a better way to do this?
> fo = time[0:3]       #
> rm = time[4:7]        #
> at  = time[11:18]
> time = fo + rm + at + ext
> 
> #Get rid of yukkies
> del ti, me, ext, fo, rm, at
> 
> #create command string
> flag = '-w'
> wincommand = 'c:/progra~1/ethereal/tethereal'
> lincommand = '/usr/sbin/./tethereal'
> 
> #run tethereal and send the output to a pcap file DDDMMMHHMM.out
> 
> if platform == 'nt':
>      os.system('%s %s %s' % (wincommand, flag, time))
> 
> if platform == 'posix':
>      os.system('%s %s %s' % (lincommand, flag, time))
> --------------------------------------------------------------------------
> Thanks,
> Dylan
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From Scott.Daniels at Acm.Org  Wed Apr  6 12:30:33 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 06 Apr 2005 09:30:33 -0700
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <42538190.432027552@news.oz.net>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<4252fec3@nntp0.pdx.net>
	<1112754535.800594.127430@g14g2000cwa.googlegroups.com>
	<42538190.432027552@news.oz.net>
Message-ID: <4254095a$1@nntp0.pdx.net>

Bengt Richter wrote:
> @deco.one
 > def foo(): pass

> Ok, now what do you call this @-line? Freaky decorator factory invocation?
> Decoratoriferous expression? ;-) 
This one has a certain je ne sais quoi ;-), but I'd call "deco.one"
the decorator function (since it _must_ evaluate to a function), and
if it needs more clarity, of your non-oderiferous proposals, I'd take:
> Decorator expression for short? 

--Scott David Daniels
Scott.Daniels at Acm.Org


From fabio.pliger at siavr.it  Tue Apr 12 09:35:09 2005
From: fabio.pliger at siavr.it (Fabio Pliger)
Date: Tue, 12 Apr 2005 13:35:09 GMT
Subject: printing with wxPython
Message-ID: <h8Q6e.60538$zZ1.1719996@twister1.libero.it>

Hi!
I'm using wxPython to handle my application gui.. So,  I have a notebook
widget and i have to print the object inside it's tab ... Maybe doing a
preview before printing... I know that wx has many objects to handle
printing.. i've tryied to use them, but i wasn't able to... Any hint? By
now, i solved the problem saving a screenshot if the screen in an image(bmp)
and then sending it to printer... (a print preview would be cool...)
tnx
F.P.







From kirk at jobsluder.net  Sun Apr 24 13:42:56 2005
From: kirk at jobsluder.net (Kirk Job Sluder)
Date: Sun, 24 Apr 2005 17:42:56 GMT
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b0d03_3@newspeer2.tds.net> <426B1300.6090802@cloudthunder.com>
	<d4f4ps$7cu$1@sea.gmane.org>
	<mailman.2374.1114315732.1799.python-list@python.org>
Message-ID: <87vf6c5aub.fsf@debian.kirkjobsluder.is-a-geek.net>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:

> Fantastic, wikipedia deals precisely with the difference between
> variables in mathematics versus programming. However, he would never
> trust a definition from such an "unreputable" source. If you have any
> other sources I might direct him to...he maintains that the notion of
> foo being a variable where it's value is known (versus unknown) is
> illogical.

The ways in which language is used between domains is rarely logical.

-- 
Kirk Job-Sluder
"The square-jawed homunculi of Tommy Hilfinger ads make every day an
existential holocaust."  --Scary Go Round


From stewart.midwinter at gmail.com  Tue Apr 26 23:25:26 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 26 Apr 2005 20:25:26 -0700
Subject: App suggestion please: blog / forum software in Python
In-Reply-To: <426eefb9$0$163$e4fe514c@news.xs4all.nl>
References: <mailman.2547.1114553904.1799.python-list@python.org>
	<w2Abe.1320$Ne7.864@newssvr17.news.prodigy.com>
	<1114565576.866943.77420@g14g2000cwa.googlegroups.com>
	<426eefb9$0$163$e4fe514c@news.xs4all.nl>
Message-ID: <1114572326.289004.225850@l41g2000cwc.googlegroups.com>

thx Irmen.  Frog is good at what it does, and of course it can't do
everything (not yet, anyway! :-)  )   But it's interesting to note your
future directions for the project. 

S



From ojokimu at yahoo.co.uk  Sat Apr  9 12:01:01 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Sat, 9 Apr 2005 17:01:01 +0100 (BST)
Subject: Installing Python 2.4 on Linux
Message-ID: <20050409160101.15856.qmail@web26810.mail.ukl.yahoo.com>

* Edward Diener wrote:
> I need python to be python2.3 else many utilities no longer work.

Then leave your 2.3 installation exactly as it is (so that python is a
link to python2.3) and run python2.4 where needed.

To specifically use python 2.4 to run IDLE, simply type in a shell:

[user]$ python2.4 /usr/bin/idle

Alternatively, create your own (executable) idle or pydoc with a
shebang that points permanently at python2.4. For example:

file: $HOME/bin/idle2.4
-----------------------------------
#!/usr/bin/python2.4

from idlelib.PyShell import main
if __name__ == '__main__':
    main()
-----------------------------------

Then if $HOME/bin is on your PATH, you can simply run: idle2.4

> The problem is then using IDLE and pydoc for Python2.4 since neither
> are .py scripts

Really?! What are they on Fedora, then?


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From grig.gheorghiu at gmail.com  Fri Apr  1 11:24:45 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 1 Apr 2005 08:24:45 -0800
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
Message-ID: <1112372685.034751.99410@o13g2000cwo.googlegroups.com>

In my mind, practicing TDD is what matters most. Which framework you
choose is a function of your actual needs. The fact that there are 3 of
them doesn't really bother me. I think it's better to have a choice
from a small number of frameworks rather than have no choice or have a
single choice that might not be the best for your specific environment
-- provided of course that this doesn't evolve into a PyWebOff-like
nightmare :-) 

Grig



From sjmachin at lexicon.net  Sun Apr 10 04:15:29 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sun, 10 Apr 2005 18:15:29 +1000
Subject: Are circular dependencies possible in Python?
References: <IEosBE.GtB@bath.ac.uk> <pan.2005.04.09.23.51.14.597138@gmx.net>
	<IEpzoq.71x@bath.ac.uk>
Message-ID: <uonh519k2v40c4cdutpv4a7pj7fhtmulni@4ax.com>

On Sun, 10 Apr 2005 07:34:02 GMT, Tim Tyler <tim at tt1lock.org>  wrote:

>Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote or quoted:
>> In <IEosBE.GtB at bath.ac.uk>, Tim Tyler wrote:
>
>> > Like C, Python seems to insist I declare functions before calling
>> > them - rather than, say, scanning to the end of the current script
>> > when it can't immediately find what function I'm referring to.
>> 
>> They don't have to be declared but to be *defined* in Python before you
>> can call them. [...]
>
>That makes three of you who have called me on my use of "declare".
>
>AFAICT, I was using the standard dictionary definition of this word:
>
>  http://dictionary.reference.com/search?q=declare
>
>The term "declare" doesn't have the same meaning as the term "predeclare".

We don't need no steenking dictionaries; we're using "declare" and
"define" in the same manner as did K&R:

int foo(int bar); /* declaration */

int foo(int bar) { /* definition */
    return 42 * bar;
}





From jstroud at mbi.ucla.edu  Sun Apr 24 13:43:07 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 24 Apr 2005 10:43:07 -0700
Subject: Variables
In-Reply-To: <426B2DB2.7080005@cloudthunder.com>
References: <426B0283.40602@cloudthunder.com> <d4f9n1$fah$1@sea.gmane.org>
	<426B2DB2.7080005@cloudthunder.com>
Message-ID: <200504241043.07897.jstroud@mbi.ucla.edu>

On Saturday 23 April 2005 10:25 pm, so sayeth Richard Blackwood:
> Unfortunately that's not much of an option for me. We are working on a
> project together so I am forced to either prove his notion incorrect or
> I give in to his conception. *throws hands in air*

This is a communcication issue. You guys probably need a relationship couselor 
or something. I think you should both agree on a common vocabulary and use 
that. Usually the "bigger" individual makes the most concessions in these 
areas, but then the "bigger" individual is usually meant for greater 
callings.

James

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

http://www.jamesstroud.com/


From webmaster at python.org  Thu Apr 28 23:45:20 2005
From: webmaster at python.org (webmaster at python.org)
Date: Thu, 28 Apr 2005 20:45:20 -0700
Subject: python.org mail flowing again
Message-ID: <20050429034520.GA8591@panix.com>

Thanks to Thomas Wouters for quickly getting mail.python.org back up
once he was notified.  The mail backlog seems to be mostly finished.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"It's 106 miles to Chicago.  We have a full tank of gas, a half-pack of
cigarettes, it's dark, and we're wearing sunglasses."  "Hit it."


From Scott.Daniels at Acm.Org  Fri Apr  8 14:21:46 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 11:21:46 -0700
Subject: curious problem with large numbers
In-Reply-To: <4256b774$1@nntp0.pdx.net>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>	<4255cd93$1@nntp0.pdx.net>
	<mailman.1517.1112938969.1799.python-list@python.org>
	<4256a676@nntp0.pdx.net> <4256b80b.34130777@news.oz.net>
	<4256b774$1@nntp0.pdx.net>
Message-ID: <4256c65c$1@nntp0.pdx.net>

Scott David Daniels wrote:
> Bengt Richter wrote:
> 
>>> Aha! Same version (2.3.4):
>>>
>>> Idle:
>>>    >>> 1e10000
>>>    1.0
>>>    >>> import struct; struct.pack('d', 1e10000)
>>>    '\x00\x00\x00\x00\x00\x00\xf0?'
>>> (which is actually 1.0)
>>>
>>> python via command line (readline support):
>>>    >>> 1e10000
>>>    1.#INF
>>>    >>> import struct; struct.pack('d', 1e10000)
>>>    '\x00\x00\x00\x00\x00\x00\xf0\x7f'
>>>
>>> Same results (command line vs. Idle) for 2.4.1.

On Python 2.2.3: (#42, Jun  4 2003, 10:33:42)
IDLE 0.8 -- press F1 for help
>>> 1e1000
1.#INF

So, sometime after that.

--Scott David Daniels
Scott.Daniels at Acm.Org



From duncan.booth at invalid.invalid  Tue Apr 26 05:31:28 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Apr 2005 09:31:28 GMT
Subject: Order of elements in a dict
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <Xns96446B11FC0A7duncanrcpcouk@127.0.0.1>

Marcio Rosa da Silva wrote:

> In other words, it is safe to do:
> 
> >>> dd = dict(zip(d.values(),d.keys()))
> 
> to exchange keys and values on a dictionary?

See the Library Reference, section 2.3.8 Mapping Types:

> Keys and values are listed in an arbitrary order which is non-random,
> varies across Python implementations, and depends on the dictionary's
> history of insertions and deletions. If items(), keys(), values(),
> iteritems(), iterkeys(), and itervalues() are called with no
> intervening modifications to the dictionary, the lists will directly
> correspond. This allows the creation of (value, key) pairs using
> zip(): "pairs = zip(a.values(), a.keys())". The same relationship
> holds for the iterkeys() and itervalues() methods: "pairs =
> zip(a.itervalues(), a.iterkeys())" provides the same value for pairs.
> Another way to create the same list is "pairs = [(v, k) for (k, v) in
> a.iteritems()]". 




From isleofthedead at earthlink.net  Mon Apr  4 00:28:31 2005
From: isleofthedead at earthlink.net (Isle Of The Dead)
Date: Mon, 04 Apr 2005 04:28:31 GMT
Subject: On slashdot
References: <1112538711.237377.308100@l41g2000cwc.googlegroups.com>
Message-ID: <Pn34e.2826$EE2.732@newsread2.news.pas.earthlink.net>


<bearophileHUGS at lycos.com> wrote in message 
news:1112538711.237377.308100 at l41g2000cwc.googlegroups.com...
> There is a discussion about "Python Moving into the Enterprise" on
> Slashdot:
>
> http://it.slashdot.org/it/05/04/03/0715209.shtml?tid=156&tid=8


Using dejanews as a proxy to measure the meme propagation of "python"
versus other scripting languages -

http://www.realmeme.com/miner/java.php?startup=/miner/java/scriptinglanguagesDejanews.png


Python is the only one that shows a clear increase in rate of growth,
which supports the "Python in Enterprise" article. 




From evenprimes at gmail.com  Tue Apr 12 12:14:38 2005
From: evenprimes at gmail.com (Chris Cioffi)
Date: Tue, 12 Apr 2005 12:14:38 -0400
Subject: exporting imports to reduce exe size?
In-Reply-To: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>
References: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>
Message-ID: <f03f4fdf05041209149385179@mail.gmail.com>

My first thought is what if the function you are using uses other
functions(maybe not exported by the module/package)?  For example:  if
some_func() makes a call to _some_weird_module_specific_func(), how
are you going to make sure you get the
_some_weird_module_specific_func function?  This doesn't even start to
work when the function you are interested in is also using functions
from other modules/packages.

Besides, what py2exe is really doing is grabbing the .pyo or .pyc
files and throwing them in a zip file.  Is it really worth the effort
to save a 100K or so, at most?

Chris

On Apr 12, 2005 10:54 AM, Ron_Adam <radam2_ at _tampabay.rr.com> wrote:
> 
> In looking at ways to reduce the size of exe's created with py2exe,
> I've noticed that it will include a whole library or module even if I
> only need one function or value from it.
> 
> What I would like to do is to import individual functions and then
> export 'write' them to a common resource file and import that with
> just the resources I need in them.
> 
> Has anyone tried this?
> 
> I'm considering using pickle to do it, but was wondering if this is
> even a viable idea?
> 
> Is it possible to pickle the name space after the imports and then
> reload the name space in place of the imports later?
> 
> Cheers,
> Ron
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
"I was born not knowing and have had only a little time to change that
here and there." -- Richard Feynman


From peter at engcorp.com  Tue Apr 12 18:38:33 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 12 Apr 2005 18:38:33 -0400
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <20050412191956.1706.59231.XPN@orion.homeinvalid>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<20050411194907.1769.17472.XPN@orion.homeinvalid>
	<425AF2FD.2080006@v.loewis.de>
	<20050412191956.1706.59231.XPN@orion.homeinvalid>
Message-ID: <d9GdnYjHStB30MHfRVn-pg@powergate.ca>

Nemesis wrote:
> OK, so the python installer _does_ ship this dll. So also the win
> installer has the redistribution problem, or does they pay for
> redistributing msvcr71.dll? 

The last I recall reading in this forum was that the regular
distribution is compiled with a copy of the compiler
*provided by* Microsoft.

Whether they really have in a mind a devious strategy
involving getting lots of people to ship software with
the msvcr71.dll file (and the other one: both are needed)
and then sue the pants off them is anyone's guess...

-Peter


From apardon at forel.vub.ac.be  Wed Apr 13 03:31:43 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Apr 2005 07:31:43 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1793.1113334936.1799.python-list@python.org>
	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1818.1113375260.1799.python-list@python.org>
Message-ID: <slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
> Antoon Pardon wrote:
>> Op 2005-04-12, Robert Kern schreef <rkern at ucsd.edu>:
>> 
>>>Antoon Pardon wrote:
>>>
>>>
>>>>What licence can I use? Somewhere they say you can combine python
>>>>code with GPL code. Does that mean that the resulting code has
>>>>to have both the GPL license as the PSF license, as both seem
>>>>to want that derived work uses the same license.
>>>
>>>No, the PSF does not want that. It does not say so anywhere in the 
>>>license text. Yes, you can GPL the derived work. The licenses are 
>>>compatible.
>>>
>> 
>> 
>> This comes from the license text.
>> 
>> | 2. Subject to the terms and conditions of this License Agreement, PSF
>> | hereby grants Licensee a nonexclusive, royalty-free, world-wide
>> | license to reproduce, analyze, test, perform and/or display publicly,
>> | prepare derivative works, distribute, and otherwise use Python 2.3
>> | alone or in any derivative version, provided, however, that PSF's
>> | License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
>> | 2001, 2002, 2003 Python Software Foundation; All Rights Reserved" are
>> | retained in Python 2.3 alone or in any derivative version prepared by
>> | Licensee.
>> 
>> So what should I understand by: provided, however, that PSF's License
>> Agreement ... are retained in Python 2.3 alone or in any derivative 
>> version prepared by Licensee.
>
> Yes, the license text and the copyright notice must be attached. It 
> doesn't mean that the PSF license is the operative one for the 
> derivative work.

Why attach a license that is not operative. That doesn't make sense
to me and will IMO just create confusion.

> You can put *your* own terms on top for *your* own code 
> as long as you can satisfy the requirements of the PSF license, which 
> are very light.
>
> Read Larry Rosen's book:
>
>    http://www.rosenlaw.com/oslbook.htm

I skimmed it and it doesn't seem to contain anything that helps me
with the PSF. If it does could you at least point me to the right
chapter.

-- 
Antoon Pardon


From python at hope.cz  Sat Apr 23 07:14:54 2005
From: python at hope.cz (Lad)
Date: 23 Apr 2005 04:14:54 -0700
Subject: Python or PHP?
Message-ID: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>

Is anyone capable of providing Python advantages over PHP if there are
any?
Cheers,
L.



From matt.fryer at gmail.com  Thu Apr 28 12:48:25 2005
From: matt.fryer at gmail.com (Matt)
Date: 28 Apr 2005 09:48:25 -0700
Subject: Which IDE is recommended?
In-Reply-To: <pd5171dmt0lfj8bu4qtji28dq6smeuhlq1@4ax.com>
References: <426f90ac$1_2@rain.i-cable.com>
	<1114612588.435456.296960@z14g2000cwz.googlegroups.com>
	<pd5171dmt0lfj8bu4qtji28dq6smeuhlq1@4ax.com>
Message-ID: <1114706904.963329.244320@o13g2000cwo.googlegroups.com>

Sorry about that Frank. You have to create a project (New --> Project)
and add your file to it then Run-->Run. This is a bug that slipped past
because we do all of our development using projects and hadn't even
tried the obvious: open file and run. That fix has made its way to the
wx folks, but hasn't been released yet.



From iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid  Mon Apr 18 05:14:20 2005
From: iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid (Maarten Sneep)
Date: Mon, 18 Apr 2005 11:14:20 +0200
Subject: distutils, PyBison and Mac OS X
Message-ID: <42637a6c$0$146$e4fe514c@news.xs4all.nl>

I'm trying to build PyBison[1] on Mac OS X, and I'm running into some
problems with the distutils.

Just for starters: PyBison requires Pyrex[2]. This is not a problem,
and Pyrex seems to work without problems, at least the primes sample
module shows a nice 25 to 30 fold speed increase over the pure python
version.

I used the distutils to create the module from the primes.pyx sample,
following the setup.py from the PyBison distrubution:

[code]
from distutils.core import setup, Extension
from Pyrex.Distutils import build_ext

setup( name = "primes", version = "1.0",
  description="Pyrex sample for calculating prime numbers",
  author='Greg Ewing', 
  url='http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/',
  ext_modules=[Extension("primes", ["primes.pyx"])],
  cmdclass = {'build_ext': build_ext}
)
[/code]

I mention this, because PyBison seems to use the distutils to compile
the bison and flex source code on the fly, but fails to pick up some
parameters, which prevents it from working correctly.

Although Mac OS X uses gcc, and is an otherwise pretty complete unix
install, it is missing some components: shared libraries are not
linked with -shared but use -bundle instead. A succesful build of
primes is linked with:

export MACOSX_DEPLOYMENT_TARGET=10.3; gcc -Wl,-F. -Wl,-F. \
    -bundle -undefined dynamic_lookup \
    build/temp.darwin-7.9.0-Power_Macintosh-2.3/primes.o \
    -o primes.so

(Another difference that caused major headaches: the absense of a
'dl' library has been resolved with version 10.3 ("Panther"). A dl
library is included as a wrapper around the bundles mechanism that
were present all along. Since the linux version uses the dl library,
I tried to compile the same source, and that part seems to run just
fine).

The issues: 

- distutils.ccompiler uses the unixcompiler, which has hard coded a
  cc -shared to create shared objects. I've tried to override this,
  but no luck there (other issues seem to crop up). Is this a known
  issue with distutils?
  
  I installed pybison using the linux C-source, and tried it out
  using the 'calc' example. After setting verbose=1 in the run.py,
  and enabling the "int lineno = 0" in calc.py, the compilation phase
  finishes without a hitch, but linking fails badly:
  
    bisonCmd=['bison', '-d', '-v', '-t', 'tmp.y']
    renaming bison output files
    tmp.tab.c => tmp.bison.c
    tmp.tab.h => tokens.h
    cc: unrecognized option `-shared'
    ld: Undefined symbols:
    _main
    _PyInt_FromLong
    _PyObject_GetAttrString
    _PyObject_HasAttrString
    _PyObject_SetAttrString
    _PyString_AsString
    _PyString_FromString
    _PyTuple_New
    _PyTuple_SetItem
    __Py_NoneStruct
    Traceback (most recent call last):
      File "run.py", line 7, in ?
        parser = calc.Parser(verbose=1, keepfiles=1)
      File ". . ./python2.3/site-packages/bison.py", line 308, 
        in __init__ self.engine = ParserEngine(self)
      File "bison_.pyx", line 187, in bison_.ParserEngine.__init__
      File "bison_.pyx", line 202, in 
        bison_.ParserEngine.openCurrentLib
      File "bison_.pyx", line 540, in bison_.ParserEngine.buildLib
      File ". . ./python2.3/distutils/ccompiler.py", line 843, 
        in link_shared_object extra_preargs, extra_postargs, 
        build_temp, target_lang)
      File ". . ./python2.3/distutils/unixccompiler.py", line 178, 
        in link raise LinkError, msg
    distutils.errors.LinkError: command 'cc' failed with exit status 1
  
- Would it be possible to modify PyBison to use a call to the 
  distutils.core.setup(. . .) function and call that as if 'python 
  setup.py build_ext --inplace' had been called from the command line, 
  since that seems to pick up the correct options.
  
- Where do I start: distutils is pretty large, and it seems to have
  the right options, but they just aren't used in PyBison.

Thanks in advance for any insights that get me going,

Maarten

Links:
[1] http://www.freenet.org.nz/python/pybison/
[2] http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/


From wp at tekran.spammenziemichnichtdankeschon.com  Tue Apr 12 16:58:32 2005
From: wp at tekran.spammenziemichnichtdankeschon.com (Warren Postma)
Date: Tue, 12 Apr 2005 16:58:32 -0400
Subject: Whither python24.dll? {WinCvs 2.0 and Python}
Message-ID: <ZEW6e.3082$8i6.263050@news20.bellglobal.com>

It seems that WinCvs needs a python??.dll runtime but that when I 
install Python2.4 it doesn't include this dll.

Python 2.3 does.

What's the recommendation here?

Warren


From stewart.midwinter at gmail.com  Mon Apr  4 16:27:56 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 4 Apr 2005 13:27:56 -0700
Subject: Makeing TopLevel Modal ?
In-Reply-To: <4250e32a$0$5821$9a6e19ea@news.newshosting.com>
References: <4250e32a$0$5821$9a6e19ea@news.newshosting.com>
Message-ID: <1112646476.314332.307940@g14g2000cwa.googlegroups.com>

well, top.transient(root) will ensure your toplevel window is on top of
all others.
IIRC, you could also use top.grab_set() to make it modal, but you'll
have to try it and see.

S



From fouff at fouff.com  Tue Apr 19 03:37:47 2005
From: fouff at fouff.com (Fouff)
Date: Tue, 19 Apr 2005 09:37:47 +0200
Subject: Question about python 2.4 documentation
Message-ID: <4264b584$0$786$626a14ce@news.free.fr>

Hello all.

I have a small question concerning the functions open(...) and file(...) 
with python 2.4

In the online version of the documentation in the build-in functions 
(section 2.1 http://docs.python.org/lib/built-in-funcs.html) here is an 
quote of the file(...) doc :
> The file() constructor is new in Python 2.2 and is an alias for open().
> Both spellings are equivalent.
> The intent is for open() to continue to be preferred for use as a factory function which
> returns a new file object.
> The spelling, file is more suited to type testing (for example, writing "isinstance(f, file)").


In my installed python 2.4 documentation the correspondig quote :
> The file() constructor is new in Python 2.2.
> The previous spelling, open(), is retained for compatibility, and is an alias for file().

If I understand well, in my version it is recommended to use file() 
function instead of open(), and in the online version it is the opposite.

what is the favorite function you recommend me to use ?


Thanks for your responses .


From No.Spam at Spam.none  Fri Apr 29 15:22:02 2005
From: No.Spam at Spam.none (I. Myself)
Date: Fri, 29 Apr 2005 19:22:02 GMT
Subject: Llearn a Little About Artificial Neural Networks and TKinter
Message-ID: <uPvce.1166498$6l.179632@pd7tw2no>

The VizANN package is a free download from annevolve.sf.net.  It 
contains a python program
that graphically demonstrates a recurrent binary neural network.  There 
is also an explanatory text file.

Mitchell Timin

-- 
"In theory, there is no difference between theory and practice.  In
practice, there is."

http://annevolve.sourceforge.net is for those seeking something to do with their wetware.

Humans may know that my email address is zenguy at shaw dot ca.


From jeremit0 at gmail.com  Fri Apr  8 15:37:42 2005
From: jeremit0 at gmail.com (jeremit0)
Date: Fri, 08 Apr 2005 15:37:42 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <78f6595afdb48aabb9c72dfe549a543e@upf.edu>
References: <d36hnj$6h6$1@sea.gmane.org>
	<78f6595afdb48aabb9c72dfe549a543e@upf.edu>
Message-ID: <d36mds$l3q$1@sea.gmane.org>

harold fellermann wrote:
> file.readlines() returns a list of lines. You can either call find on each
> element in this list, like:
> 
> for line in myfile.readlines() :
>     if line.find('my particular string') :
>         do_something()
> 
I had thought that may be the only way to do it, I was hoping for 
something simpler as I wrote earlier.
Thanks for your help,
Jeremy



From martin.witte at gmail.com  Sun Apr 10 15:50:33 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 10 Apr 2005 12:50:33 -0700
Subject: Smart help again
References: <1113154873.292836.251810@l41g2000cwc.googlegroups.com>
Message-ID: <1113162633.524074.91440@f14g2000cwb.googlegroups.com>

You can create your own Exception class, based on thisrecipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52215, it will
look like

-import sys, traceback
-
-class Error:
-    def __init__(self, arg):
-        self._arg = arg
-        tb = sys.exc_info()[2]
-        while 1:
-            if not tb.tb_next:
-                break
-            tb = tb.tb_next
-        stack = []
-        f = tb.tb_frame
-        while f:
-            stack.append(f)
-            f = f.f_back
-        stack.reverse()
-        #traceback.print_exc()
-        print "Locals by frame, innermost last"
-        for frame in stack:
-            print
-            print "Frame %s in %s at line %s" % \
-                (frame.f_code.co_name, frame.f_code.co_filename,
-frame.f_lineno)
-            for key, value in frame.f_locals.items():
-                print "\t%20s = " % key,
-                #We have to be careful not to cause a new error in our
-error
-                #printer! Calling str() on an unknown object could
cause -an
-                #error we don't want.
-                try:
-                    print value
-                except:
-                    print "<ERROR WHILE PRINTING VALUE>"-
-
-    def __repr__(self):
-        return repr(self._arg)
-

suppose this class is in a module named test.py, then your code can be
like:

-#!/usr/bin/env python
-import test, sys

-try:
-    try:
-        class Spam:
-            def eggs(self):
-                return 1/0
-        foo = Spam()
-        foo.eggs()
-    except:
-        raise test.Error('xxx')
-except test.Error, e:
-    print >> sys.stderr, e.__class__.__name__, e


The output will be:
-Locals by frame, innermost last
-
-Frame ? in ./test2.py at line 12
-                        Spam =  __main__.Spam
-                __builtins__ =  <module '__builtin__' (built-in)>
-                    __file__ =  ./test2.py
-                         sys =  <module 'sys' (built-in)>
-                        test =  <module 'test' from
'/home/martin/test.pyc'>
-                    __name__ =  __main__
-                         foo =  <__main__.Spam instance at 0xb7e0720c>
-                     __doc__ =  None

-Frame eggs in ./test2.py at line 8
-                        self =  <__main__.Spam instance at 0xb7e0720c>
-Error 'xxx'



From flupke at nonexistingdomain.com  Thu Apr 21 09:44:37 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Thu, 21 Apr 2005 13:44:37 GMT
Subject: __del__ and reference count problem
Message-ID: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>

Hi,

i'm starting work and a simple database layer and wanted to use the 
__del__ to open and close a connection. However, i get an erro when 
executing this script:

class Table:
     refcount = 0
     def __init__(self, name):
         self.name = name
         print "table %s " % repr(self)
         Table.refcount += 1
         print "refcount = %s" % str(Table.refcount)

     def __del__(self):
         Table.refcount -= 1
         if (Table.refcount == 0):
             print "Last table standing"
         else:
             print "There is/are still %d table(s) left." % Table.refcount

     def __getitem__(self,item):
         return "not implemented"

     def howMany(self):
         if (Table.refcount == 1):
             print "Only 1 table"
         else:
             print "There are %d tables active." % Table.refcount

if __name__ == '__main__':
     suppliera = Table("suppliers")
     supplierb = Table("suppliers")
     print "Supplier returned from a %s: %s" % (1, suppliera[1])
     print "Supplier returned from b %s: %s" % (2, supplierb[2])
     suppliera.howMany()
     supplierb.howMany()

This produces the following output and error:
table <__main__.Table instance at 0x008D5C10>
refcount = 1
table <__main__.Table instance at 0x008D5C38>
refcount = 2
Supplier returned from a 1: not implemented
Supplier returned from b 2: not implemented
There are 2 tables active.
There are 2 tables active.
Exception exceptions.AttributeError: "'NoneType' object has no attribute 
'refcount'" in <bound method Table.__del__ of <__main__.Table instance 
at 0x008D5C10>> ignored
Exception exceptions.AttributeError: "'NoneType' object has no attribute 
'refcount'" in <bound method Table.__del__ of <__main__.Table instance 
at 0x008D5C38>> ignored

What am i doing wrong?
Thanks
Benedict


From jerf at jerf.org  Mon Apr 25 15:29:03 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Mon, 25 Apr 2005 15:29:03 -0400
Subject: What's do list comprehensions do that generator
	expressions	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
Message-ID: <pan.2005.04.25.19.29.02.291034@jerf.org>

On Sun, 24 Apr 2005 22:59:12 -0700, Robert Kern wrote:
> Never. If you really need a list
> 
> list(x*x for x in xrange(10))
> 
> Sadly, we can't remove list comprehensions until 3.0.

Why "remove" them? Instead, we have these things called "comprehensions"
(which, now that I say that, seems a rather odd name), and you can control
whether they result in a list or a generator with () or [].

I don't see why they need to be "removed". Lists are already a special
case of the "only one way to do it" principle ([] vs. list()), and
pragmatically I don't see any reason to remove them here; it doesn't add
comprehensibility, leaving them in doesn't significantly affect the mental
size of the code (the *comprehension* is the hard part, the final form
should be relatively simple), it's not worth breaking that code.


From listspam at flowtheory.net  Fri Apr  8 13:04:56 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Fri, 8 Apr 2005 11:04:56 -0600
Subject: redirect stdout
In-Reply-To: <loom.20050408T184916-520@post.gmane.org>
References: <loom.20050408T184916-520@post.gmane.org>
Message-ID: <f11f63b9413a0d739c0ebe88f9284c93@flowtheory.net>

Use *NIX magic. Make a named pipe to a python program that pushes stdin 
to syslog and when you execute your program, redirect stdout to the 
named pipe.

-jag

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 8, 2005, at 10:52 AM, Neal Becker wrote:

> I'd like to build a module that would redirect stdout to send it to a 
> logging
> module.  I want to be able to use a python module that expects to print
> results using "print" or "sys.stdout.write()" and without modifying 
> that
> module, be able to redirect it's stdout to a logger which will send the
> messages via datagrams to a server.
>
> Any ideas?
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>

From prasad413in at gmail.com  Mon Apr 18 17:32:28 2005
From: prasad413in at gmail.com (hue)
Date: 18 Apr 2005 14:32:28 -0700
Subject: Parse command line options
References: <1113811225.458022.195270@g14g2000cwa.googlegroups.com>
	<slrnd66rv7.9jg.klaus@main.szn.dk>
Message-ID: <1113859948.472659.122280@o13g2000cwo.googlegroups.com>

Thanks for your reply, I have used some of your ideas in my Code.



From kehoea at parhasard.net  Sat Apr  9 19:11:14 2005
From: kehoea at parhasard.net (Aidan Kehoe)
Date: Sun, 10 Apr 2005 00:11:14 +0100
Subject: EOL created by .write or .encode
References: <1112680718.843606.126860@o13g2000cwo.googlegroups.com>
	<1113034010.742291.94360@o13g2000cwo.googlegroups.com>
Message-ID: <16984.24850.844317.741609@parhasard.net>


 Ar an naoi? l? de m? Aibr?an, scr?obh Xah Lee: 

 > If you open a file in emacs, it will open fine regardless whether the
 > EOL is ascii 10 or 13. (unix or mac) This is a nice feature. However,
 > the what-cursor-position which is used to show cursor position and the
 > char's ascii code, says the EOL is ascii 10 when it is in fact ascii
 > 13.

This _is_ the right thing to do--there?s no reason naive programs written in
Emacs Lisp should have to worry about different on-disk representations of
line-endings. If you want to open a file which uses \015 as its line
endings, and have those \015 characters appear in the buffer, open it using
a coding system ending in -unix. C-u C-x C-f /path/to/file RET
iso-8859-1-unix RET in XEmacs, something I don?t know but I?m certain exists
in GNU Emacs. 

-- 
?I, for instance, am gung-ho about open source because my family is being
held hostage in Rob Malda?s basement. But who fact-checks me, or Enderle,
when we say something in public? No-one!? -- Danny O?Brien


From jeremit0 at gmail.com  Tue Apr 12 20:13:15 2005
From: jeremit0 at gmail.com (jeremit0)
Date: Tue, 12 Apr 2005 20:13:15 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36hnj$6h6$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>
Message-ID: <d3ho19$o0k$1@sea.gmane.org>

jeremit0 wrote:
> I have read a text file using the command
> 
> lines = myfile.readlines()
> 
> and now I want to seach those lines for a particular string.  I was 
> hoping there was a way to "find" that string in a similar way as 
> searching simply a simple string.  I want to do something like
> 
> lines.find.('my particular string')
> 
> Is there a module that already exists that allows me to do this or will 
> I have to created my own method?
> Thanks,
> Jeremy
> 
After all the many suggestions (there were many good ones) I found 
something even better in "Python in a Nutshell".  I should have found it 
earlier.  I can do the following:

a = lines.index('my favorite line\n')

and a is the index of lines where "my favorite line' is located.  I 
hadn't seen this earlier, but it suits my purposes perfectly.
Thanks for everyone's suggestions,
Jeremy



From greg.lindstrom at novasyshealth.com  Tue Apr 19 13:17:28 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: Tue, 19 Apr 2005 12:17:28 -0500
Subject: Using Paramiko
Message-ID: <42653D28.1020506@novasyshealth.com>

Can anyone point me to a "how-to" on Paramiko?  I need to use sftp for 
file transfer, have installed Paramiko and have a connection (that was 
pretty easy, actually), but cannot find documentation on how to transfer 
a file (I have demo_simple.py but can't figure it out).  Perhaps I 
missed a section of the documentation; if I did, I apologize.  Can 
anyone show me how to use this package?

Thanks,
--greg

-- 
Greg Lindstrom               501 975.4859 (office)
Senior Programmer            501 219-4455 (fax)
NovaSys Health               greg.lindstrom at novasyshealth.com
Little Rock, Arkansas

"We are the music makers, and we are the dreamers of dreams."  W.W.



From TechAlerts at gmail.com  Mon Apr 11 17:08:11 2005
From: TechAlerts at gmail.com (Kanthi Kiran Narisetti)
Date: 11 Apr 2005 14:08:11 -0700
Subject: Programming Language for Systems Administrator
Message-ID: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>

Hi All,

I am Windows Systems Administrator(planning to migrate to Linux
administration in near future), I have occassionally written few batch
files and Vbscripts to automate my tasks.

Now I have strong interest to learn a programming language that would
help me to write Scripts or Application ( In Systems Administrative
point of view) .

I have read on net that Python is the best way to start of for beginers
, Please let me your suggestions and help me out to chose to the right
programming language to write scripts ranging from simple automation
scripts to appliations for my workflow.

I am confused to chose between C++,Python,Perl.

Thanks in Advance

Kk



From steve at holdenweb.com  Thu Apr 21 05:33:19 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 05:33:19 -0400
Subject: Enumerating formatting strings
In-Reply-To: <d46qmq$nca$1@sea.gmane.org>
References: <mailman.2061.1113855968.1799.python-list@python.org>	<3cm9r2F6nif67U1@individual.net>	<d44vgg$jmr$04$1@news.t-online.com>	<42660fc2.42093557@news.oz.net>	<d455oo$7et$02$1@news.t-online.com>	<42662dc9.49780670@news.oz.net>	<mailman.2202.1114027350.1799.python-list@python.org>	<pan.2005.04.20.22.50.45.945404@dalkescientific.com>
	<d46qmq$nca$1@sea.gmane.org>
Message-ID: <4267735F.9050309@holdenweb.com>

Michael Spencer wrote:
> Andrew Dalke wrote:
> 
>> I see you assume that only \w+ can fit inside of a %()
>> in a format string.  The actual Python code allows anything
>> up to the balanced closed parens.
>>
> Gah! I guess that torpedoes the regexp approach, then.
> 
> Thanks for looking at this
> 
> Michael
> 
While Andrew may have found the "fatal flaw" in your scheme, it's worth 
pointing out that it works just fine for my original use case.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From michele.simionato at gmail.com  Mon Apr  4 12:05:01 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 4 Apr 2005 09:05:01 -0700
Subject: "specialdict" module
In-Reply-To: <mailman.1264.1112560102.1799.python-list@python.org>
References: <3bamhhF6j009lU1@individual.net>
	<mailman.1264.1112560102.1799.python-list@python.org>
Message-ID: <1112630701.185674.147030@f14g2000cwb.googlegroups.com>

Michael Spencer:
> Alternatively, you could provide factory functions to construct the
defaultdict.
>  Someone (Michele?) recently posted an implementation of this

Yes, here is the link for the ones who missed that thread:

http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/a0bae9b887a4de41/7567d30b796423c7?q=simionato+defaultdict&rnum=1#7567d30b796423c7



From jerf at jerf.org  Mon Apr 25 19:56:26 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Mon, 25 Apr 2005 19:56:26 -0400
Subject: What's do list comprehensions do that generator
	expressions	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
Message-ID: <pan.2005.04.25.23.56.25.840188@jerf.org>

On Mon, 25 Apr 2005 16:48:46 -0400, Bill Mill wrote:

> On 25 Apr 2005 23:33:48 +0300, Ville Vainio <ville at spammers.com> wrote:

>> Still, list comprehensions should be implemented in terms of genexps to
>> get rid of the LC variable that is visible outside the scope of the LC.
>> 
>> 
> +1 . I think that we should still have the form [genexp] , but without the
> dangling variable, and implemented with generator expressions. It seems to
> me that it is inconsistent if I can do list(genexp) but not [genexp] ,
> since they are so similar. Once that happens, we can tell people who ask
> the OP's question that [genexp] is just another way to spell list(genexp),
> and he should use it if he wants the entire list constructed in memory.

This is what I meant.

Robert Kern says the implementations really differ, but I submit that
is an accident of the order they were created in, not a fundamental
constraint. list(genexp) works today and does almost exactly the same
thing, minus an optimization or two that people are working on
generalizing anyways, which is the right approach. I doubt that Python 3.0
would have two radically different implementations; they'll just have the
genexp implementation, and an optimization for list creation if the list
creation can know the size in advance, regardless of where it came from.

>>     Jeremy> should be relatively simple), it's not worth breaking that
>>     Jeremy> code.
>> 
>> Well, the code that relies on the dangling variable deserves to break.
> 
> Agreed.

This is not what I meant and I agree with it too. Breaking code depending
on variable leaking is one thing; breaking all code that uses list
comprehensions is quite another. Just because 3.0 is going to break a lot
of code anyhow doesn't mean we should be *gratuitous* about it!


From postmaster at castleamber.com  Wed Apr 20 05:43:36 2005
From: postmaster at castleamber.com (John Bokma)
Date: 20 Apr 2005 09:43:36 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
Message-ID: <Xns963E2FE7BD81Dcastleamber@130.133.1.4>

Raymond Hettinger wrote:

> to seeing code like:   for(i=0 ; i<n; i++) a[i]=f(i);   In contrast, a
> BASIC programmer may be used to FOR I = 1 to N:  a[I]=f(I); NEXT.   

Afaik, at least BBC BASIC uses zero based arrays :-) Maybe ZX Spectrum 
Basic too (too long ago to remember).

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


From mfranklin1 at gatwick.westerngeco.slb.com  Thu Apr 21 11:32:07 2005
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 21 Apr 2005 16:32:07 +0100
Subject: A smallish Tkinter question
In-Reply-To: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
References: <1114096464.111138.262750@o13g2000cwo.googlegroups.com>
Message-ID: <d48gpa$hp0$1@sea.gmane.org>

mediocre_person at hotmail.com wrote:
> """
> What I want: A little window to open with a 0 in it. Every second, the
> 0 should increment by 1.
> What I get: A one second delay, see the window with a 1 in it, and then
> nothing appears to happen. Never see the 0, never see a 2.  Any quick
> clues? Thanks. Nick. (Python 2.4, Win98).
> """
> 
> from Tkinter import *
> from time import sleep
> 
> class Clock:
>     def __init__(self, parent):
>         self.time = 0
>         self.display = Label(parent)
>         self.display["font"] = "Arial 16"
>         self.display["text"] = str(self.time)
>         self.display.pack()
> 
>     def run(self): #also tried self,parent
>         sleep(1.0)
>         self.time = self.time + 1
>         self.display["text"] = str(self.time)
> 
> win = Tk()
> app = Clock(win)
> app.run() #also tried run(win) with self,parent above
> win.mainloop()
> 

Nick,

Look at the after method of the Tk widget also google for Tkinter clock
examples should get results

Cheers,
Martin.



From anon at anon.com  Fri Apr  1 20:33:59 2005
From: anon at anon.com (Todd_Calhoun)
Date: Fri, 1 Apr 2005 17:33:59 -0800
Subject: [Newbie] Search-and-delete text processing problem...
Message-ID: <0eadnS8Lk5Aaa9DfRVn-gw@speakeasy.net>

I'm trying to learn about text processing in Python, and I'm trying to 
tackle what should be a simple task.

I have long text files of books with a citation between each paragraph, 
which might be like "Bill D. Smith, History through the Ages, p.5".

So, I need to search for every line that starts with a certain string (in 
this example, "Bill D. Smith"), and delete the whole line.

I've tried a couple of different things, but none seem to work.  Here's my 
latest try.  I apologize in advance for being so clueless.

##########################
#Text search and delete line tool

theInFile = open("test_f.txt", "r")
theOutFile = open("test_f_out.txt", "w")

allLines = theInFile.readlines()

for line in allLines:
    if line[3] == 'Bill':
        line == ' '


theOutFile.writelines(allLines)
#########################

I know I could do it in Word fairly easily, but I'd like to learn the Python 
way to do things.

Thanks for any advice. 




From jepler at unpythonic.net  Sat Apr 30 15:29:14 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 30 Apr 2005 14:29:14 -0500
Subject: tkinter OptionMenu column break
In-Reply-To: <1114799644.189218.307370@g14g2000cwa.googlegroups.com>
References: <1114799644.189218.307370@g14g2000cwa.googlegroups.com>
Message-ID: <20050430192912.GA4840@unpythonic.net>

I don't think that Tk's menus ever use more than one column.  They
certainly don't on Unix.

Jeff
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From peter at engcorp.com  Fri Apr 22 10:19:15 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 22 Apr 2005 10:19:15 -0400
Subject: Resolving 10060, 'Operation timed out'
In-Reply-To: <1114099353.581868.292880@o13g2000cwo.googlegroups.com>
References: <1114018777.408294.304200@z14g2000cwz.googlegroups.com>
	<42669814.9000104@syscononline.com>
	<q_GdnV7wcP9dbfvfRVn-vw@powergate.ca>
	<1114099353.581868.292880@o13g2000cwo.googlegroups.com>
Message-ID: <HOadnbckd5dDmvTfRVn-og@powergate.ca>

willitfw wrote:
> I'm including the code that I've been using.  I am relatively new to
> python, and not sure if a socket was created:
> 
> *****************
> import socket
> 
> socket.setdefaulttimeout(None)
> sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

The last line above creates a socket... and I suspect
the line ahead of it is redundant.

More importantly, you can probably avoid using
the defaulttimeout thing if you just do settimeout
on the newly created socket...


From aahz at pythoncraft.com  Fri Apr  8 23:33:19 2005
From: aahz at pythoncraft.com (Aahz)
Date: Fri, 8 Apr 2005 20:33:19 -0700
Subject: BayPIGgies: April 14, 7:30pm (FIRST meeting at IronPort)
Message-ID: <20050409033319.GA27300@panix.com>

NOTE: we are no longer meeting at Stanford; the April meeting is at
IronPort in San Bruno


The next meeting of BayPIGgies will be Thurs, April 14 at 7:30pm.

Guido van Rossum (and any other BayPIGgies who wish to contribute) will
review the activities at PyCon 2005.

BayPIGgies meetings alternate between IronPort (San Bruno, California)
and Google (Mountain View, California).  For more information and
directions, see http://www.baypiggies.net/


Before the meeting, we may meet at 6pm for dinner.  Discussion of dinner
plans is handled on the BayPIGgies mailing list.


Advance notice: The May 12 meeting agenda has not been set.  Please send
e-mail to baypiggies at baypiggies.net if you want to suggest an agenda (or
volunteer to give a presentation).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From peter at engcorp.com  Sat Apr  2 10:26:21 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 02 Apr 2005 10:26:21 -0500
Subject: unittest vs py.test?
In-Reply-To: <WKt3e.1908$7b.429@trndny01>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
Message-ID: <6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>

Raymond Hettinger wrote:
> [Peter Hansen]
> 
>>This is pretty, but I *want* my tests to be contained
>>in separate functions or methods.
> 
> 
> In py.test, those would read:
> 
> def test1():
>     assert a == b
> 
> def test2():
>     raises(Error, func, args)
> 
> Enclosing classes are optional.

So basically py.test skips the import statement,
near as I can tell, at the cost of requiring a
utility to be installed in the PATH.

Where was all that weight that unittest supposedly
has?

(I'm not dissing py.test, and intend to check it
out.  I'm just objecting to claims that unittest
somehow is "heavy", when those claiming that it
is seem to think you have to use TestSuites and
TestRunner objects directly... I think they've
overlooked the relatively lightweight approach
that has worked so well for me for four years...)

-Peter


From shulee123 at gmail.com  Wed Apr 27 15:13:19 2005
From: shulee123 at gmail.com (Milon)
Date: 27 Apr 2005 12:13:19 -0700
Subject: How to launch an application on a remote computer using Python
Message-ID: <1114629199.617385.89800@o13g2000cwo.googlegroups.com>

I have 2 computers hooked to the same network.  One of the computer has
Python installed, and I want to write a python script to launch
"c:\notepad.exe" on the second computer, how do I do this?  (Note:
Python is not installed on the second computer)

Thanks.



From bokr at oz.net  Tue Apr 12 07:20:05 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 12 Apr 2005 11:20:05 GMT
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
Message-ID: <425bac0d.185429854@news.oz.net>

On 12 Apr 2005 03:09:48 -0700, "Michele Simionato" <michele.simionato at gmail.com> wrote:

>Steven Bethard:
>> It strikes me that I've never wanted or needed a singleton object.
>> Would you mind sharing your use case?  I'm just curious.
>
>"Singleton" is the most idiotic pattern ever. If you want an instance,
>just
>instantiate your class once. If a class should have only one instance,
>you can just document it. What I find usuful is "memoize", which
>contains "Singleton" as a special case. So I use memoize even
>for singleton would-be, i.e. logfiles and databases connections
>(memoizing the connections, if I try to open a database twice with the
>same parameters, I am returned an instance of the already opened
>database).
>

For most user application purposes, I agree,
just use a single instance like a responsible adult ;-)

But isn't bool supposed to be a singleton class/type ?

 >>> [bool(x) for x in 0, 0.0, [], {}, False]
 [False, False, False, False, False]
 >>> [id(bool(x)) for x in 0, 0.0, [], {}, False]
 [505014288, 505014288, 505014288, 505014288, 505014288]

Regards,
Bengt Richter


From kasimov at i.com.ua  Wed Apr 20 09:09:59 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 16:09:59 +0300
Subject: goto statement
In-Reply-To: <3cmuqpF6km9ruU1@individual.net>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<3cmuqpF6km9ruU1@individual.net>
Message-ID: <d45kgl$f16$1@news.tsystems.kiev.ua>

> 
> Use multi-line string literals.
> 
> '''

it will not help if there is another ''' or/and """ inside of code block

> 
> This whole 'code' is "commented out", and you can
> use every type of """quote""" except three singles.
> 
> '''
> 
> Or, if you really like the spirit of goto,
> use "if 0:".

... and add tabs to each string

> 
> Reinhold


-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From mauriceling at acm.org  Wed Apr 27 07:03:26 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 21:03:26 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org>
	<mailman.2524.1114533204.1799.python-list@python.org>
	<d4mc39$dl9$1@domitilla.aioe.org> <426F2C3A.80402@v.loewis.de>
Message-ID: <d4nrhu$rl3$1@domitilla.aioe.org>

Martin v. L?wis wrote:
> Maurice LING wrote:
> 
>>technicalities are wrong but situation remains unchanged.
> 
> 
> For C modules, it is very likely that new versions of Python
> will continue to break the ABI, by changing the layout of
> structures.
> 
> The most straight-forward way to deal with it as a sysadmin
> or user is to install multiple versions of Python on a single
> machine. If Fink considers python2.4 as a replacement for
> python2.3, then this is a flaw in Fink. In Debian, there is
> a python package, which currently depends on python2.3.
> Sometime in the future, it will depend on python2.4. Users
> which update will then get python2.4, however, python2.3
> will remain installed and usable, with all the extension
> modules that were installed for it.
> 
> Regards,
> Martin

Fink does not consider python2.4 to be a replacement for python2.3. In 
fact, you can install python2.2, 2.3 and 2.4 in the same machine with 
Fink. It will maintain 3 sets of libraries as /sw/lib/python2.2, 
/sw/lib/python2.3 and /sw/lib/python2.4. The chore is that when say Fink 
installs python2.4, all the libraries in /sw/lib/python2.3/site-packages 
have to be re-installed into /sw/lib/python2.4/site-packages, one by 
one. There is no simple way of doing that... which makes any system 
admin needing to re-install 50 3rd party libraries into 
/sw/lib/python2.4/site-packages a big task, as well as satisfying the 
necessary dependencies.

So if C extension API (or whatever that is really called) is stable, the 
system admin can just copy all of /sw/lib/python2.3/site-packages into 
/sw/lib/python2.4/site-packages and it should work. From what you've 
said, it seems that this isn't possible. So my alternative solution is 
that PyPI have a mechanism to maintain what had been installed in the 
site-package directory and to download the libraries and install into 
the new site-package directory...

What do you think?

Cheers
maurice


From bokr at oz.net  Wed Apr  6 04:17:20 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 06 Apr 2005 08:17:20 GMT
Subject: Does IronPython indicate MS interest in dynamic languages?
References: <1111603770.909447.18070@z14g2000cwz.googlegroups.com>
	<acidnWJnCsYDPc_fRVn-1g@wideopenwest.com>
	<1f7befae05040512422ef693d4@mail.gmail.com>
	<mailman.1408.1112743462.1799.python-list@python.org>
	<fnqbi2-p9c.ln1@lairds.us>
	<yIadneprl6oqxc7fRVn-gw@wideopenwest.com>
Message-ID: <42539aa9.438452150@news.oz.net>

On Tue, 05 Apr 2005 23:34:25 -0400, Thomas Gagne <tgagne at wide-open-west.com> wrote:

>Cameron Laird wrote:
><snip>
>> 
>> And now, for something completely different, I'll tender a
>> personal view:  I think Mr. Gates and Python are actually
>> destined to get along uncharacteristically well.  Roughly, I
>> suspect the habits and motivations of the two are so skew,
>> that the usual "embrace and extend" simply won't obtain.  I
>> soberly expect IronPython to work out well for both Microsoft
>> and Python.
>
>The techweb.com article said something interesting.
>
>> "Python is an open-source dynamic language; dynamic languages enable developers to produce applications more efficiently by reducing the amount of complexity in the code they write," Jason Matusow, program manager of Microsoft's Shared Source Initiative, writes on his blog. "Microsoft's IronPython project demonstrates the benefits of putting the Python dynamic language on the .NET Common Language Runtime."
>
>Assuming (I don't know for certain) that MS's PR approves all messages 
>that leave the building, I'm wondering if this foray into dynamic 
>languages doesn't signal something greater on MS' part.  While Sun and 
>Java (and C# for the most part) have remained statically-typed, do you 
>think IronPython might indicate a new direction for MS language development?

If there is to be an MSPython, how long 'til Mozilla FirePython? ;-)

Regards,
Bengt Richter


From theller at python.net  Tue Apr 26 10:42:59 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 26 Apr 2005 16:42:59 +0200
Subject: How to start python interactively from python script?
References: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>
Message-ID: <hdht8uq4.fsf@python.net>

"draghuram at gmail.com" <draghuram at gmail.com> writes:

> Hi,
>
> I would like to have a python script which does some computations at
> the beginning and then changes to interactive mode (by displaying the
> prompt). How can I do this?


You call 'os.setenv["PYTHONINSPECT"] = "1"' at the somewher in your
script.

Thomas


From fredrik at pythonware.com  Sat Apr  9 13:22:16 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 9 Apr 2005 19:22:16 +0200
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be><1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
Message-ID: <d392r6$5lk$1@sea.gmane.org>

Reinhold Birkenfeld wrote:

> It's evil anyway (for more complex applications) to put GUI construction
> in your code. GUI should be described appropriately in data files.

why use data files when you have an extremely powerful programming
language in your toolbox?  the advantage of building UI's in Python is
that you can quickly create "domain specific UI languages", and use them
to generate the interfaces for you.  UI editors may be useful for trivial
applications, but if you're doing complex stuff, you sure want domain-
specific abstractions.  Python gives you that, XML files don't.

</F>





From okyoon at stanford.edu  Mon Apr  4 04:37:11 2005
From: okyoon at stanford.edu (Oh Kyu Yoon)
Date: Mon, 4 Apr 2005 01:37:11 -0700
Subject: Question about Enthought python distribution
Message-ID: <d2qubl$77j$1@news.Stanford.EDU>

Hi!
I have been using the python 2.3.3 distribution from Enthought Inc because 
it has most of the libraries I use included.
Does anyone know when Enthought will release the python 2.4 distribution?
Thanks.

Ohkyu





From brian at brianandkate.com  Mon Apr  4 11:06:23 2005
From: brian at brianandkate.com (Brian Blazer)
Date: Mon, 04 Apr 2005 15:06:23 GMT
Subject: playing with pyGoogle - strange codec error
Message-ID: <2005040410062316807%brian@brianandkatecom>

Hello,

I am playing around with pyGoogle and encountered an error that I have 
never seen, and I am unsure how to correct for it.  Here is a code 
snippet:

for r in data.results:
    print 'Title: ',r.title
    print 'URL: ',r.URL
    print 'Summary: ',r.snippet
    print

Everything works fine until I get to r.snippet.  Here is the error:

UnicodeEncodeError: 'ascii' codec can't encode character '\ua9' in 
position 119: ordinal not in range(128)

Any help is appreciated.

Thanks,
Brian
-- 
Nail a post to the Spalted Board. Free WW'ing software and forums.  
Regular freebies! http://www.spaltedboard.com



From Facundo.Batista at telefonicamoviles.com.ar  Mon Apr 11 12:37:20 2005
From: Facundo.Batista at telefonicamoviles.com.ar (Batista, Facundo)
Date: Mon, 11 Apr 2005 13:37:20 -0300
Subject: PyAr - Python Argentina 8th Meeting, this  Thursday
Message-ID: <A128D751272CD411BC9200508BC2194D053C8235@escpl.tcp.com.ar>

The Argentine Python User Group, PyAr, will have its eighth
meeting this Thursday, January 10th at 7:00pm.


Agenda
------

Despite our agenda tends to be rather open, this time we would
like to cover these topics:

- Conclusions of PyAr in PyCon 2005.
- See what we'll do with the t-shirts, and how we'll export them.
- Analyze a future meeting point.

	
Where
-----

We're meeting at Hip Hop Bar, Hip?lito Yirigoyen 640, Ciudad de Buenos
Aires, starting at 19hs. We will be in the back room, so please ask
the barman for us.


About PyAr
----------

For more information on PyAr see http://pyar.decode.com.ar (in Spanish), 
or join our mailing list (Also in Spanish. For instructions see 
http://pyar.decode.com.ar/Members/ltorre/listademail)

We meet on the second Thursday of every month.

.	Facundo
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From MrJean1 at gmail.com  Tue Apr 19 14:47:14 2005
From: MrJean1 at gmail.com (MrJean1)
Date: 19 Apr 2005 11:47:14 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<1113680973.635576.310510@g14g2000cwa.googlegroups.com>
	<1113713669.255207.39580@f14g2000cwb.googlegroups.com>
	<1113726606.945042.71820@z14g2000cwz.googlegroups.com>
	<1113730429.336626.81360@g14g2000cwa.googlegroups.com>
	<1113732226.165477.295890@o13g2000cwo.googlegroups.com>
	<1113767235.173452.224680@z14g2000cwz.googlegroups.com>
Message-ID: <1113936434.889694.81150@z14g2000cwz.googlegroups.com>

Attached is another version of the stripper.py file.  It contains my
change which seem to handle docstring correctly (at least on itself).


/Jean Brouwers

<pre>

######################################################################
# Python source stripper / cleaner ;)
######################################################################

import os
import sys
import token
import keyword
import StringIO
import tokenize
import traceback
__credits__ = \
'''
J?rgen Hermann
M.E.Farmer
Jean Brouwers
'''
__version__ = '.8'
__author__ = 'M.E.Farmer'
__date__ =  'Apr 16, 2005,' \
            'Jan 15 2005,' \
            'Oct 24 2004' \

'''this docstring should be removed
'''

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

class Stripper:
    """Python source stripper / cleaner
    """
    def __init__(self, raw):
        self.raw = raw

    def format(self, out=sys.stdout, comments=0, docstrings=0,
                spaces=1, untabify=1, eol='unix'):
        """ strip comments,
            strip docstrings,
            strip extra whitespace and lines,
            convert tabs to spaces,
            convert EOL's in Python code.
        """
        # Store line offsets in self.lines
        self.lines = [0, 0]
        pos = 0
        self.temp = StringIO.StringIO()
        # Strips the first blank line if 1
        self.lasttoken = 1
        self.spaces = spaces
        # 0  = no change, 1 = strip 'em
        self.comments = comments # yep even these
        # 0  = no change, 1 = strip 'em, 8 or 'pep8'= strip all but
"""'s
        self.docstrings = docstrings

        if untabify:
           self.raw = self.raw.expandtabs()
        self.raw = self.raw.rstrip()+' '
        self.out = out

        # Have you ever had a multiple line ending script?
        # They can be nasty so lets get them all the same.
        self.raw = self.raw.replace('\r\n', '\n')
        self.raw = self.raw.replace('\r', '\n')
        self.lineend = '\n'

        # Gather lines
        while 1:
            pos = self.raw.find(self.lineend, pos) + 1
            if not pos: break
            self.lines.append(pos)

        self.lines.append(len(self.raw))
        self.pos = 0
        self.lastOP = ''

        # Wrap text in a filelike object
        text = StringIO.StringIO(self.raw)

        # Parse the source.
        ## Tokenize calls the __call__
        ## method for each token till done.
        try:
            tokenize.tokenize(text.readline, self)
        except tokenize.TokenError, ex:
            traceback.print_exc()

        # Ok now we write it to a file
        # but we also need to clean the whitespace
        # between the lines and at the ends.
        self.temp.seek(0)

        # All this should be written into the
        # __call__ method just haven't yet...

        # Mac CR
        if eol == 'mac':
           self.lineend = '\r'
        # Windows CR LF
        elif eol == 'win':
           self.lineend = '\r\n'
        # Unix LF
        else:
           self.lineend = '\n'

        for line in self.temp.readlines():
            if spaces == -1:
                self.out.write(line.rstrip()+self.lineend)
            else:
                if not line.isspace():
                    self.lasttoken=0
                    self.out.write(line.rstrip()+self.lineend)
                else:
                    self.lasttoken+=1
                    if self.lasttoken<=self.spaces and self.spaces:
                        self.out.write(self.lineend)

    def __call__(self, toktype, toktext, (srow,scol), (erow,ecol),
line):
        """ Token handler.
        """
        # calculate new positions
        oldpos = self.pos
        newpos = self.lines[srow] + scol
        self.pos = newpos + len(toktext)

      ##print "*token: %s  text: %r  line: %r" % \
               (token.tok_name[toktype], toktext, line)

        # kill comments
        if self.comments:
            if toktype == tokenize.COMMENT:
                return

        # kill doc strings
        if self.docstrings:
            # a STRING must be a docstring
            # if the most recent OP was ':'
            if toktype == tokenize.STRING and self.lastOP == ':':
                # pep8 frowns on triple single quotes
                if (self.docstrings == 'pep8' or
                    self.docstrings == 8):
                    if not toktext.endswith('"""'):
                        return
                else:
                    return
            elif toktype == token.OP:
                # remember most recent OP
                self.lastOP = toktext
            elif self.lastOP == ':':
                # newline and indent are OK inside docstring
                if toktype not in [token.NEWLINE, token.INDENT]:
                   # otherwise the docstring ends
                   self.lastOP = ''
            elif toktype == token.NEWLINE:
                # consider any string starting
                # on a new line as a docstring
                self.lastOP = ':'

        # handle newlines
        if toktype in [token.NEWLINE, tokenize.NL]:
            self.temp.write(self.lineend)
            return

        # send the original whitespace
        if newpos > oldpos:
            self.temp.write(self.raw[oldpos:newpos])

        # skip indenting tokens
        if toktype in [token.INDENT, token.DEDENT]:
            self.pos = newpos
            return

        # send text to the temp file
        self.temp.write(toktext)
        return
######################################################################

def Main():
    import sys
    if sys.argv[1]:
        filein = open(sys.argv[1]).read()
        Stripper(filein).format(out=sys.stdout,
                 comments=1, docstrings=1, untabify=1, eol='win')
######################################################################

if __name__ == '__main__':
    Main()

</pre>



M.E.Farmer wrote:
> I found the bug and hope I have squashed it.
> Single and qouble quoted strings that were assignments and spanned
> multilines using \ , were chopped after the first line.
> example:
> __date__ =  'Apr 16, 2005,' \
>             'Jan 15 2005,' \
>             'Oct 24 2004'
> became:
> __date__ =  'Apr 16, 2005,' \
>
> Not good :(
>
> tokenizer sends this as:
> name
> operator
> string
> string
> string
> newline
>
> I added test for string assignments that end in \.
> A flag is set and then all strings till a newline are ignored.
> Also rearranged the script a little.
> Maybe that will do it ...
> Updates available at
> > The script is located at:
> >  http://bellsouthpwp.net/m/e/mefjr75/python/stripper.py
> > 
> > M.E.Farmer



From quantumcheesedog at gmail.com  Wed Apr  6 09:14:17 2005
From: quantumcheesedog at gmail.com (python newbie)
Date: Wed, 06 Apr 2005 13:14:17 GMT
Subject: Harvestman install not working
Message-ID: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>

Hi, I previously had Harvestman installed and working okay, but somehow the
latest version won't install.

I have Python23 installed.

When I attempt to execute the py2exesetup.bat file (on Windows XP), I get:

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

E:\zips\internet\utilities\HarvestMan-1.4\HarvestMan-1.4.tar\HarvestMan-1.4\Harv
estMan>rem Batch file for creating py2exe executable for Harvestman
usage: install.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: install.py --help [cmd1 cmd2 ...]
   or: install.py --help-commands
   or: install.py cmd --help

error: option --force-imports not recognized
Press any key to continue . . .


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

Any suggestions?
 Thanks





From claird at lairds.us  Wed Apr 20 11:08:03 2005
From: claird at lairds.us (Cameron Laird)
Date: Wed, 20 Apr 2005 15:08:03 GMT
Subject: newbie question
References: <465db603.0504191314.5d074cf8@posting.google.com>
	<1113947675.400070.319430@o13g2000cwo.googlegroups.com>
	<mailman.2137.1113949084.1799.python-list@python.org>
Message-ID: <rj4ij2-pi5.ln1@lairds.us>

In article <mailman.2137.1113949084.1799.python-list at python.org>,
Tiziano Bettio  <t.bettio at transnorm.ch> wrote:
			.
			.
			.
>If u want to achieve high performance you'd rather use c++ and directly 
>access libs like nvidias cg, ms directx or opengl...
			.
			.
			.
Yes.  Well, maybe.  Python-coded programs, even graphically-intense
games, *can* exhibit good performance, and there are numerous 
anecdotes about applications LOSING speed on conversion to C++ from
Python.  Moreover, there's no inherent conflict between C++ and
Python; some successful applications use both.

My summary:  it's a subtler matter than, "for performance, abandon
Python on favor of C++".  I think you know that, but I want to make
it explicit for less-experienced readers.


From joal at bigpond.net.au  Fri Apr  1 23:16:39 2005
From: joal at bigpond.net.au (Joal Heagney)
Date: Sat, 02 Apr 2005 04:16:39 GMT
Subject: New to programming question
In-Reply-To: <SJo3e.20868$C7.13157@news-server.bigpond.net.au>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>	<0_63e.19914$C7.11056@news-server.bigpond.net.au>	<B%63e.19916$C7.1024@news-server.bigpond.net.au>	<424d1573.11134991@news.oz.net>	<iJc3e.20399$C7.2091@news-server.bigpond.net.au>
	<mailman.1218.1112400551.1799.python-list@python.org>
	<SJo3e.20868$C7.13157@news-server.bigpond.net.au>
Message-ID: <H0p3e.20887$C7.5896@news-server.bigpond.net.au>

Joal Heagney wrote:
> Steve Holden wrote:
>> I suppose this would be far too easy to understand, then:
>>
>> pr =['Guess my name', 'Wrong, try again', 'Last chance']
>> for p in pr:
>>   name = raw_input(p+": ")
>>   if name == "Ben":
>>     print "You're right!"
>>     break
>> else:
>>   print "Loser: no more tries for you"
>>
>> regards
>>  Steve
> 
> 
> THIS is why I like python! There's always a simple, easy to understand 
> way to do something. If it looks complex, then there must me something 
> wrong.
> 
> Joal

And now that I've looked at the documentation of the for loop, I 
understand it as well! :)

The following explaination is for Ben, so he knows what's going on.
 From the documentation, with a little rewriting.


"The for statement is used to iterate over the elements of a sequence 
(such as a string, tuple or list) or other iterable object:

for target_list "in" expression_list:
	<do this first>
else:
	<now do this last>

The expression list is evaluated once and should yield a sequence(such 
as a string, tuple, list or iterator object).
Each item in the sequence is assigned to the target_list variable in 
turn. Then the "do this first" instructions are then executed once for 
each item in the sequence.
When the items are exhausted (which is immediately when the sequence is 
empty), the "now do this last" instructions in the else statement, if 
present, are executed, and the loop terminates.

A break statement executed in the first section terminates the WHOLE 
loop without executing the else clause. A continue statement executed in 
the first stage skips the rest of these instructions for that loop and 
continues with the next item, or with the else clause if there was no 
next item."

So copying Steve's example:

 >> pr =['Guess my name', 'Wrong, try again', 'Last chance']
 >> for p in pr:
 >>   name = raw_input(p+": ")
 >>   if name == "Ben":
 >>     print "You're right!"
 >>     break
 >> else:
 >>   print "Loser: no more tries for you"

This allows us to execute the else clause if the name is guessed 
incorrectly three times.
However, if the name is guessed correctly, then the break statement 
pulls us completely out of the loop without executing the else clause.

My original example attempted to do this by splitting the loop up into a 
series of different cases because I was unaware of this additional 
behaviour with the for loop expression. Steve's method = much better.

Joal


From ojokimu at yahoo.co.uk  Sat Apr  9 09:14:58 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Sat, 9 Apr 2005 14:14:58 +0100 (BST)
Subject: change the date string into timestamp
Message-ID: <20050409131458.98170.qmail@web26805.mail.ukl.yahoo.com>

> praba kar wrote:
> 
> > In Php strtotime() will change a date
> > string into timestamp.  I want to know which 
> > python function will  change a date string
> > into timestamp.
> 

To convert a date-string *to* a timestamp (as you asked):

>>> import time, calendar
>>> date_string = time.strftime('%c', time.gmtime(1112952134))
>>> print date_string
Fri Apr  8 09:22:14 2005
>>> calendar.timegm(time.strptime(date_string))
1112952134


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From Gerald.Klix at klix.ch  Thu Apr  7 13:05:03 2005
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Thu, 07 Apr 2005 19:05:03 +0200
Subject: Python backend binding to PAM, NSS or pppd
In-Reply-To: <d33bpr$d48$04$2@news.t-online.com>
References: <mailman.1466.1112849070.1799.python-list@python.org>	<d33bnt$d48$04$1@news.t-online.com>
	<d33bpr$d48$04$2@news.t-online.com>
Message-ID: <4255683F.9080500@klix.ch>

Well, I am actually playing, right now. For http://www.carelix.org I 
implemented
a module that
   * adds a user to passwd and
   * authenticates that user given a certificate and some other info on 
removable media
   * it creates an encrypted loopback file, that is mounted as the 
user's home directory utilising Loop-AES and the certficate on the floppy
   * and it opens an openvpn connection using the same certificate
   * and, of course, unmounts the loopback file and terminates the vpn 
on logout.

Perhaps this is somewhat more than playing :)

cya,
Gerald

Diez B. Roggisch schrieb:
>>I've been using pyton-pam before. Works as expected - but pam frustrated
>>me a bit, and you gotta run as root for it to work - a thing I didn't want
>>to do.
> 
> 
> Ok, I just found that you wanted to play from the other side of the fence -
> never mind my answer. 

-- 
GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634



From sjmachin at lexicon.net  Thu Apr 28 20:41:16 2005
From: sjmachin at lexicon.net (John Machin)
Date: Fri, 29 Apr 2005 10:41:16 +1000
Subject: Best way to parse file into db-type layout?
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
Message-ID: <a6v2711u3hft7ed2ft95gqiggi2cnaak2r@4ax.com>

On Thu, 28 Apr 2005 23:34:31 GMT, Peter A. Schott
<paschott at no.yahoo.spamm.com> wrote:

>I've got a file that seems to come across more like a dictionary from what I can
>tell.  Something like the following format:
>
>###,1,val_1,2,val_2,3,val_3,5,val_5,10,val_10
>###,1,val_1,2,val_2,3,val_3,5,val_5,11,val_11,25,val_25,967,val_967
>
>In other words, different layouts (defined mostly by what is in val_1, val_2,
>val_3).
>
>The ,#, fields indicate what "field" from our mainframe the corresponding value
>represents.
>
>Is there a good way to parse this into a DB-type format where I only pull out
>the values corresponding to the appropriate field numbers?  Seems like
>converting to a dictionary of some sort would be best, but I don't quite know
>how I would go about that.
>
>In this case, the first field is a value unto itself - represents a "letter
>type" that would be associated with the rest of the record.  The fields are
>either present or not, no placeholder if there's no value for e.g. Field #4.

Here's a sketch, tested as you'll see, but totally devoid of the
error-checking that would be necessary for any data coming from an MF.

C:\junk>type schott.txt
pers,1,xxx,2,yyy,3,zzz,100,SMITH,101,JOHN,102,ALOYSIUS,103,1969-12-31
addr,1,qqq,2,www,3,eee,200,"""THE LODGE"", 123 MAIN ST",205,WALLA
WALLA,206,WA

C:\junk>type schott.py
import csv
for row in csv.reader(open('schott.txt', 'rb')):
    rectype = row[0]
    recdict = {}
    for k in range(1, len(row), 2):
        recdict[int(row[k])] = row[k+1]
    print rectype, recdict

C:\junk>python schott.py
pers {1: 'xxx', 2: 'yyy', 3: 'zzz', 100: 'SMITH', 101: 'JOHN', 102:
'ALOYSIUS', 103: '1969-12-31'}
addr {1: 'qqq', 2: 'www', 3: 'eee', 200: '"THE LODGE", 123 MAIN ST',
205: 'WALLA WALLA', 206: 'WA'}

Hint: you'll probably go nuts if you don't implement some sort of
naming convention instead of those numbers.

One way would be like this:

mf_surname = 100
mf_given_1 = 101
...
mf_state = 206

then you can refer to recdict[mf_state] instead of recdict[206].

Going upmarket a bit:

Have a mf_map = {100: 'surname', 206: 'state', } # etc etc

then you do

class Record(object):
    pass

# for each row:
   rec = Record()
   rec.rectype = row[0]
   for k in range(1, len(row), 2):
       setattr(rec, mf_map[int(row[k])], row[k+1])

Then you can refer to rec.state instead of recdict[mf_state] or
recdict[206].

Further upmarket would involve gathering basic "type" information
about the MF fields (free text, alpha code, identifier (e.g. SSN),
money, quantity, date, etc etc) so that you can do validations and
format conversions as appropriate.

HTH,
John





From R.Brodie at rl.ac.uk  Tue Apr 26 04:39:21 2005
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Tue, 26 Apr 2005 09:39:21 +0100
Subject: regex over files
References: <426D0659.7080307@chamonix.reportlab.co.uk><426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
Message-ID: <d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>


"Robin Becker" <robin at reportlab.com> wrote in message
news:mailman.2469.1114444689.1799.python-list at python.org...
> Gerald Klix wrote:
> > Map the file into RAM by using the mmap module.
> > The file's contents than is availabel as a seachable string.
> >
>
> that's a good idea, but I wonder if it actually saves on memory? I just tried
> regexing through a 25Mb file and end up with 40Mb as working set (it rose
> linearly as the loop progessed through the file). Am I actually saving anything
> by not letting normal vm do its thing?

You aren't saving memory in that sense, no. If you have any RAM spare the
file will end up in it. However, if you are short on memory though, mmaping the
file gives the VM the opportunity to discard pages from the file, instead of paging
them out. Try again with a 25Gb file and watch the difference ;) YMMV.




From pellis.no.spam at tampabay.rr.com  Thu Apr 28 23:15:13 2005
From: pellis.no.spam at tampabay.rr.com (Patrick Ellis)
Date: Fri, 29 Apr 2005 03:15:13 GMT
Subject: Fast plotting?
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
	<5bbea$42706a5a$d1b714b9$22961@PRIMUS.CA>
Message-ID: <5Fhce.28061$5f.13056@tornado.tampabay.rr.com>

William Park <opengeometry at yahoo.ca> typed:
> Russell E. Owen <rowen at cesmail.net> wrote:
>> Can anyone recommend a fast cross-platform plotting package for 2-D
>> plots?
>>
>> Our situation:
>> We are driving an instrument that outputs data at 20Hz. Control is
>> via an existing Tkinter application (which is being extended for
>> this new instrument) that runs on unix, mac and windows. We wish to
>> update 5-10 summary plots at approximately 2 Hz and will be offering
>> controls to control the instrument and the plots, preferably (but
>> not necessarily) mixed in with the plots.
>
> That's 10-20 plots per second.  The only GUI plotter that I know is
> 'gnuplot', and I don't know if it will spit out anything at 10-20Hz.
> For character plots (like old days terminal), it has speed but ugly to
> look at.
>
>>
>> Ideally the package would create plots in the Tkinter application.
>> But we realize we're unlikely to get the speed we need that way. So
>> we are willing to have the Tkinter app send data to the plotting
>> package  (e.g. via a socket) and have it display the plots in a
>> separate process.
>>
>> We started out with matplotlib, which is a wonderful package (and
>> well integrated with most or all GUI toolkits). Unfortunately it is
>> just too slow -- at least when driving plots integrated with the
>> Tkinter app. (It is getting faster and so are computers, so at some
>> point this will be a great way to go. But for now...)
>>
>> Any suggestions?
>>
>> -- Russell

disipyl is a wrapper around dislin. It includes a class that lets plots
appear inside tkinter frames. I did a quick test and the first demo plot
(run tkdisipyl.py) of a 180 point sine and cosine plotted at over 100 Hz.

http://kim.bio.upenn.edu/~pmagwene/disipyl.html
http://www.mps.mpg.de/dislin/




From sjmachin at lexicon.net  Sun Apr 10 21:54:23 2005
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 11 Apr 2005 11:54:23 +1000
Subject: Dictonary persistance weirdness
References: <pan.2005.04.10.22.07.17.604742@datafull.com>
Message-ID: <s3mj51humrj74flof8ak0eqq4ju74veaq1@4ax.com>

On Sun, 10 Apr 2005 19:07:23 -0300, Gonzalo Sainz-Tr?paga (GomoX)
<gomoSINSPAM at datafull.com> wrote:


>    def get_vars():
>        d = {}
>        for each in self.fs.list:
>            self.d[x.name] = x.value
>        return d
>

... and didn't you mean

   def get_vars(self):

?




From peter at engcorp.com  Wed Apr 27 09:11:39 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 27 Apr 2005 09:11:39 -0400
Subject: Getting into Python, comming from Perl.
In-Reply-To: <75au619qpianhqjofhqmr8jenf1eol0abq@4ax.com>
References: <mailman.2409.1114365369.1799.python-list@python.org>
	<slrnd6pd48.uga.nick@irishsea.home.craig-wood.com>
	<75au619qpianhqjofhqmr8jenf1eol0abq@4ax.com>
Message-ID: <6bidnVQFDbEVEvLfRVn-2Q@powergate.ca>

Tim Roberts wrote:
> That is truly wonderous.  Are you famliar with the phrase "jumping the
> shark"?  This chart might prove that, with Perl 6, Perl has now "jumped the
> shark".

For those of us who maybe don't spend enough time
watching TV: http://www.wordspy.com/words/jumptheshark.asp

-Peter


From grig.gheorghiu at gmail.com  Mon Apr 11 17:16:25 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 11 Apr 2005 14:16:25 -0700
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <1113254185.144321.163210@o13g2000cwo.googlegroups.com>

In my experience, Python is more Windows-friendly than Perl. Mark
Hammond's Python Extensions for Windows are a lifesaver. You can
download the package from http://sourceforge.net/projects/pywin32/ or
install the ActiveState Python package, which includes the Windows
extensions.

I use Python for example to automate user and mailbox management in
Active Directory and Exchange. I also use the mxODBC module to interact
with SQL Server.

I warmly recommend "Python Programming on Win32" by Mark Hammond and
Andy Robinson (O'Reilly).

Grig



From skip at pobox.com  Mon Apr 18 23:16:30 2005
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 18 Apr 2005 22:16:30 -0500
Subject: Proposal: an unchanging URL for Python documentation
In-Reply-To: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
References: <1113878396.500420.256230@g14g2000cwa.googlegroups.com>
Message-ID: <16996.30734.778261.632448@montanaro.dyndns.org>


    steve> I propose that an additional a URL be set up for the Python HTML
    steve> documentation.  This URL will always contain the current version
    steve> of the documentation.  Suppose we call it "current".  Then (while
    steve> 2.4 is still the current version) the documentation for the os
    steve> module would also be available at
    steve> http://python.org/doc/current/lib/module-os.html.

Time machine at work?  The above URL works for me now.

    steve> (3) This would give Pythonistas -- basically as a freebie --
    steve> annotatable documentation.  You may be familiar with Wikalong (
    steve> http://www.wikalong.org/ ).  Wikalong basically allows you to
    steve> annotate any URL.

But appears to be firefox-specific.

Skip


From lbates at syscononline.com  Mon Apr  4 18:16:58 2005
From: lbates at syscononline.com (Larry Bates)
Date: Mon, 04 Apr 2005 17:16:58 -0500
Subject: Insert database rows from CSV file
In-Reply-To: <d2sb9901nlr@enews3.newsguy.com>
References: <d2sb9901nlr@enews3.newsguy.com>
Message-ID: <CuSdndFAEfVYIczfRVn-iw@comcast.com>

You may want to take a look at this link.  It should
be much faster than any programmatic technique.

http://www.its.niu.edu/its/CSupport/tipoftheweek/tip_080502.shtml

If you still want to do it programmatically, you will need to
look at csv module to parse the lines.

Larry Bates



3c273 wrote:
> Hello,
> I have a really simple Access database table with a format similar to this:
> CustomerName - ProductOrdered - QtyOrdered
> 
> I have a CSV file with the appropriate values as follows:
> Customer1, Widget1, 1000
> Customer2, Widget2, 3000
> etc
> 
> I have figured out how to insert the data manually from the interactive
> prompt:
> cursor.execute(""" INSERT INTO "Table1" Values ('Customer1', "Widget1',
> '1000') """)
> 
> What I would like to do is iterate over the CSV file like this:
> for lines in file:
>     cursor.execute(""" INSERT INTO "Table1" lines """)
> 
> I have googled and found some examples that use string formatting, but
> without documentation I can't seem to find the right formula. I don't have
> any problem with the iteration part, I just can't seem to figure out how to
> use a variable to insert an entire row with the INSERT statement. Can anyone
> get me going in the right direction? I'm using odbc from win32all,
> Python2.3, and Access2000 if it matters. Thanks.
> Louis
> 
> 


From steven.bethard at gmail.com  Fri Apr  1 13:15:42 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 01 Apr 2005 11:15:42 -0700
Subject: numeric module
In-Reply-To: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
Message-ID: <l9udnTOH3bYvEtDfRVn-vA@comcast.com>

shama.bell at gmail.com wrote:
> Hello,
> What's the problem with this code? I get the following error message:
> 
>  File "test.py", line 26, in test
>     print tbl[wi][bi]
> IndexError: index must be either an int or a sequence
> 
> ---code snippet----
> 
> from Numeric import *
> tbl = zeros((32, 16))
> 
> def test():
> 
>     val = testme()
>     wi = crc >> 4
>     bi = crc & 0xFL
>     print wi
>     print bi
>     print tbl[wi][bi]
> 
> 
> def testme():
>     val = 0xFFFFFFL
>     val >>= 23
>     return val
> 
>         
> if __name__ == '__main__':
>     test()

Hmm...  I can't reproduce this with numarray.  Maybe this only exists in 
Numeric?  Are you sure that the code here is what produced the error?

py> import numarray as na
py> tbl = na.zeros((32, 16))
py> def test():
...     val = testme()
...     wi = val >> 4
...     bi = val & 0xFL
...     print wi
...     print bi
...     print tbl[wi][bi]
...
py> def testme():
...     val = 0xFFFFFFL
...     val >>= 23
...     return val
...
py> test()
0
1
0

STeVe


From mwm at mired.org  Sun Apr 24 00:03:47 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 23 Apr 2005 23:03:47 -0500
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
Message-ID: <86u0lwrfbw.fsf@guru.mired.org>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:

> Robert Kern wrote:
>> Richard Blackwood wrote:
>>> To All:
>>>
>>>    Folks, I need your help. I have a friend who claims that if I write:
>>>
>>> foo = 5
>>>
>>> then foo is NOT a variable, necessarily. If you guys can define for
>>> me what a variable is and what qualifications you have to back you,
>>> I can pass this along to, hopefully, convince him that foo is
>>> indeed a variable.
>>
>> None of us can do that unless you tell us what he thinks the word
>> "variable" means. The terminology is a bit fluid. I suspect that
>> your friend applying a somewhat restricted notion of "variable" that
>> coincides with the behavior of variables in some other language.
>>
> Indeed, this language is math. My friend says that foo is a constant
> and necessarily not a variable. If I had written foo = raw_input(), he
> would say that foo is a variable. Which is perfectly fine except that
> he insists that since programming came from math, the concept of
> variable is necessarily the identical. This can not be true. For
> example, I may define foo as being a dictionary, but I can not do this
> within math because there is no concept of dictionaries within
> mathematics; yet foo is a variable, a name bound to a value which can
> change.

Wrong on two counts.

First, new disciplines often redefine words to mean something
different than the disciplines they were derived from. Variable is a
good example of that. In math, a variable is a placeholder in an (a
system of) equation(s), and will have associated with it a (possibly
empty) set of values that satisfy the equation(s). In programming, a
variable holds a value of some kind. As you point out, the value may
be complicated, in that it holds one or more objects.

In math, if you say "foo = 5", foo is a variable, with a single value
(5) that satisfies the equation. In Python, if you say "foo = 5", foo
is a variable, that currently references the value 5.

What Python calls a "dictionary" math calls a "mapping", or sometimes
a "function" (though that usage is usually reserved for mappings
to/from numbers of some kind). A mapping is a relationship between
elements of two sets, pairing elements of the first set with elements
of the second set. In a Python dictionary, the first set is keys(), and the
second set is values(). In both cases, the pairing is unidirectional,
as picking an element from the first set (keys) selects a unique
element from the second set (values), but picking an element from the
second set (values) may pick more than one element from the first set
(keys). See <URL: http://www.answers.com/topic/function > for more
information.

Note that lists and tuples are both mappings, though in their case the
first set is restricted to the integers. If you check the Python
documentation, you'll see these three types (dictionaries, lists and
tuples) documented in a section called "Mapping Types".

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From merkosh at hadiko.de  Tue Apr 12 03:16:43 2005
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 12 Apr 2005 09:16:43 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
Message-ID: <d3fskr$be8$1@news2.rz.uni-karlsruhe.de>

Tuesday 12 April 2005 06:36 am Steven Bethard wrote:
> Uwe Mayer wrote:
>> I've been looking into ways of creating singleton objects.
> 
> It strikes me that I've never wanted or needed a singleton object.
> Would you mind sharing your use case?  I'm just curious.

I am using a class to manage configuration settings in an application. This
object should only existe once so that when the user
changes a setting through a configuration dialog the change imminent in all
locations where access to config settings are needed.

I was using a factory function bevore, but since I am starting to use Python
2.4 and I remembered having read about a singleton-decorator I went to look
deeper into the possibilities.

Ciao
Uwe     


From codecraig at gmail.com  Thu Apr 21 09:13:02 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 06:13:02 -0700
Subject: Private class?
Message-ID: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>

Hi,
  First, I come from a Java background.

  Ok, so I have this idea that I want to create an EventBus...basically
a central class where objects can register themselves as listeners for
different events.  This central class also has methods so that objects
can fire events.  Something like this...

Say we have object MrTree and object MotherNature.  MrTree listens for
EVENT_GROW_LEAVES.  So, when MrTree "hears" about EVENT_GROW_LEAVES,
MrTree will do just that, grow some leaves.  So, while our python app
is running, MotherNature needs to tell MrTree to grow leaves.  I am
suggesting something like this...

1. MrTree has a method, growLeaves()

2. MrTree registers for the event, EventBus.register(MrTree,
EVENT_GROW_LEAVES)

3. MotherNature fires grow leaves, EventBus.fire(EVENT_GROW_LEAVES)

4. MrTree's growLeaves method gets called by EventBus.

Now, in Java I would make EventBus a Singleton so that only one
instance of it would exist.  And I would have MrTree implement
EventListener interface, where the interface defines a method like
growLeaves().  So when MotherNature tells the EventBus to fire the
event, EventBus loops through it's list of listeners and calls,
growLeaves()

How would I go about doing this in Python?  Here is my quick idea

class EventListener:
    def eventOccurred(self, eventType): pass

class MrTree(EventListener):
    def __init__(self):
        EventListener.__init__(self)
        EventBus.register(self, EventBus.EVENT_GROW_LEAVES)

    def eventOccurred(self, eventType):
        if eventType == EventBus.EVENT_GROW_LEAVES:
            print "Growing Leaves"

class EventBus:
    EVENT_GROW_LEAVES = 0

    __listeners = {}

    def register(listener, eventType):
        if __listeners.has_key(eventType):
            curListeners = __listeners.get(eventType)
            curListeners.append(listener)
        else:
            __listeners[eventType] = [listener]

    def fire(eventType):
        if __listeners.has_key(eventType):
            x = __listeners.get(eventType)
            for l in x:
                l.eventOccurred(eventType)

class MotherNature:
    def doSomeStuff():
        print "doing whatever Mother Nature does..."
        EventBus.fire(EventBus.EVENT_GROW_LEAVES)


...so that is what I am thinking.  However, i guess my issue is how to
make EventBus a singleton or prevent it from being instaniated and
making it's methods statically accessible.

thanks.



From mail at markus-franz.de  Thu Apr  7 14:20:16 2005
From: mail at markus-franz.de (Markus Franz)
Date: Thu, 07 Apr 2005 20:20:16 +0200
Subject: Use string in URLs
Message-ID: <d33tdo$fvr$05$1@news.t-online.com>

Hi.


I want to use the string "r?ffer" in a get-request, so I tried to encode it.

My problem: But with urllib.quote I always get "r%FCffer", but I want to 
get "r%C3%BCffer" (with is correct in my opinion).

Thanks.


Markus


From hancock at anansispaceworks.com  Thu Apr 14 03:43:40 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Thu, 14 Apr 2005 02:43:40 -0500
Subject: Inelegant
In-Reply-To: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>
References: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>
Message-ID: <200504140243.40577.hancock@anansispaceworks.com>

On Thursday 14 April 2005 02:03 am, Dan wrote:
> If you use triple quotes to define a string, then the newlines are
> implicitly included.  This is a very nice feature.  But if you're
> inside a function or statement, then you'll want the string to be
> positioned along that indentation.  And the consequences of this is
> that the string will include those indentations.
>  [...]
> But that's just ugly. 

Yeah, it's definitely a wart.  So much so that recent Python
distributions include a function to fix it:

>>> from textwrap import dedent
>>> string_block = dedent("""
...                       This string will have the leading
...                       spaces removed so that it doesn't
...                       have to break up the indenting.
...                       """)
>>> string_block
"\nThis string will have the leading\nspaces removed so that it doesn't\nhave to break up the indenting.\n"
>>> print string_block
 
This string will have the leading
spaces removed so that it doesn't
have to break up the indenting.
 



--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From ramen at lackingtalent.com  Thu Apr 28 15:55:46 2005
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 28 Apr 2005 12:55:46 -0700
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <i9bce.1960$i73.1367@okepread03>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk> <wh8ce.142$%o.107@fed1read05>
	<d4rb04$209$1@gemini.csx.cam.ac.uk>
	<XFace.17198$UX1.12035@fe08.usenetserver.com>
	<i9bce.1960$i73.1367@okepread03>
Message-ID: <Lebce.1961$i73.237@okepread03>

Dave Benjamin wrote:
> You could use a combination of bound methods and the "curry" function 
> defined in the Python Cookbook:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549
> 
> The examples in the discussion do just that.

Also, in the CVS version of Python, there's a new module called 
"functional" with a function called "partial" that does the same thing 
as far as I can tell. So, in the future, this function will probably be 
available in the standard library.

Dave


From bill.mill at gmail.com  Mon Apr 25 16:48:46 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Mon, 25 Apr 2005 16:48:46 -0400
Subject: What's do list comprehensions do that generator expressions
	don't?
In-Reply-To: <du7wtqq8ukz.fsf@mozart.cc.tut.fi>
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
Message-ID: <797fe3d4050425134828f38653@mail.gmail.com>

On 25 Apr 2005 23:33:48 +0300, Ville Vainio <ville at spammers.com> wrote:
> >>>>> "Jeremy" == Jeremy Bowers <jerf at jerf.org> writes:
> 
>     Jeremy> On Sun, 24 Apr 2005 22:59:12 -0700, Robert Kern wrote:
>     >> Never. If you really need a list
>     >>
>     >> list(x*x for x in xrange(10))
>     >>
>     >> Sadly, we can't remove list comprehensions until 3.0.
> 
>     Jeremy> Why "remove" them? Instead, we have these things called
>     Jeremy> "comprehensions" (which, now that I say that, seems a
>     Jeremy> rather odd name), and you can control whether they result
>     Jeremy> in a list or a generator with () or [].
> 
> Still, list comprehensions should be implemented in terms of genexps
> to get rid of the LC variable that is visible outside the scope of the
> LC.
> 

+1 . I think that we should still have the form [genexp] , but without
the dangling variable, and implemented with generator expressions. It
seems to me that it is inconsistent if I can do list(genexp) but not
[genexp] , since they are so similar. Once that happens, we can tell
people who ask the OP's question that [genexp] is just another way to
spell list(genexp), and he should use it if he wants the entire list
constructed in memory.

>     Jeremy> should be relatively simple), it's not worth breaking that
>     Jeremy> code.
> 
> Well, the code that relies on the dangling variable deserves to break.

Agreed.

Peace
Bill Mill
bill.mill at gmail.com


From bokr at oz.net  Tue Apr 19 20:40:58 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 00:40:58 GMT
Subject: Array of Chars to String
References: <mailman.2133.1113942800.1799.python-list@python.org>	<42658990.7739398@news.oz.net>
	<d443t0$tg8$1@sea.gmane.org>
	<mailman.2140.1113955187.1799.python-list@python.org>
Message-ID: <4265a3c8.14451179@news.oz.net>

On Tue, 19 Apr 2005 17:00:02 -0700, Michael Spencer <mahs at telcopartners.com> wrote:

>Michael Spencer wrote:
>> Bengt Richter wrote:
>>  > I think this will be worth it if your string to modify is _very_ long:
>> 
>>>
>>>  >>> def some_func(s, letters, table=''.join([chr(i) for i in 
>>> xrange(256)])):
>>>  ...     return s.translate(table,
>>>  ...            ''.join([chr(i) for i in xrange(256) if chr(i) not in 
>>> letters]))
>>>  ...
>>>  >>> some_func("Bob Carol Ted Alice", 'adB')
>>>  'Bad'
>>>
>> According to my measurements the string doesn't have to be long at all 
>> before your method is faster - cool use of str.translate:
>> 
>...and here's a version that appears faster than "".join across all lengths of 
>strings:
>  >>> import string
>  >>> def some_func1(s, letters, table=string.maketrans("","")):
>  ...     return s.translate(table, table.translate(table, letters))
>  ...
>  >>> some_func1("Bob Carol Ted Alice", "adB")
>  'Bad'
>  >>>
>
Good one! ;-)

BTW, since str has .translate, why not .maketrans?

Anyway, this will be something to keep in mind when doing character-based joinery ;-)

>Timings follow:
Let's just say improved ;-)
(or see parent post)

Regards,
Bengt Richter


From martin at v.loewis.de  Thu Apr 28 00:32:23 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 28 Apr 2005 06:32:23 +0200
Subject: bytecode non-backcompatibility
In-Reply-To: <d4p4af$qn4$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org><1114418065.581779.52480@l41g2000cwc.googlegroups.com>	<d4kh4q$tqf$1@domitilla.aioe.org><mailman.2524.1114533204.1799.python-list@python.org><d4mc39$dl9$1@domitilla.aioe.org>	<426F2C3A.80402@v.loewis.de>
	<d4nrhu$rl3$1@domitilla.aioe.org>
	<mailman.2589.1114619222.1799.python-list@python.org>
	<d4p4af$qn4$1@domitilla.aioe.org>
Message-ID: <42706757$0$27765$9b622d9e@news.freenet.de>

Maurice LING wrote:
>> I doubt anyone disputes that upgrades are more hassle than we would
>> like. My main point was that freezing CPython's technology is not the
>> solution. Any other upgrade helper that you can contribute will be
>> welcome.
> 
> So there is no way of releasing a close-source application written in
> Python?

I fail to see the relationship between the statement and your question.

Again, whether or not the C API is frozen has nothing to do with
whether or not the bytecode format is frozen. So any implication
from not freezing the C API to not being able to ship byte-code
only is invalid.

As for only shipping byte code: sure, that is certainly possible,
and people do that all the time.

Regards,
Martin


From blah at iinet.net.au  Wed Apr 13 09:01:55 2005
From: blah at iinet.net.au (paul)
Date: Wed, 13 Apr 2005 21:01:55 +0800
Subject: isbntools. (python script to download book informaiton)
Message-ID: <425d173c$0$25062$5a62ac22@per-qv1-newsreader-01.iinet.net.au>

Hello,

I am trying to make up a catalogue of my books.

I found tools on isbntools.com in python.  YAY i thought.

Something happens! But I cant seem to get the part to download the books
information from amazon.com working correctly. It connects, but I think the
regular expressions used in the code aren't upto date(amazon has changed the
form or html code). I was wondering has anyone hacked around with it to get
it working.

Thanks.




From fredrik at pythonware.com  Sun Apr 17 08:59:50 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 17 Apr 2005 14:59:50 +0200
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com><mailman.1746.1113303998.1799.python-list@python.org><sjeo51hst8a26uqd0ejlv30l5tjnkh43j6@4ax.com>
	<20050417124752.GA1482@isis.sigpipe.cz>
Message-ID: <d3tmcu$bu0$1@sea.gmane.org>

Roman Neuhauser wrote:
 
>> Here's a puzzle for you: Where does this list appear? What's missing?
>> 
>> "..., Mullender, Nagata, Ng, Oner, Oppelstrup, ..."
> 
>    Sorry, I don't have time for puzzles.

nor for contributing, it seems.  otherwise, your name would be on that list.

</F>



From sizer at nospam.com  Wed Apr 27 18:24:04 2005
From: sizer at nospam.com (Sizer)
Date: 27 Apr 2005 17:24:04 -0500
Subject: [pygame]  Very simple program fails.  Why?
References: <1tWdneW8RMsvEPPfRVn-og@comcast.com>
Message-ID: <Xns96459CCA8DAA4sizernospamcom@216.40.28.85>

"Brent W. Hughes" <brent.hughes at comcast.net> wrote in
news:1tWdneW8RMsvEPPfRVn-og at comcast.com: 

> I'm just starting to learn pygame.  I write what I think is just about
> the simplest program that should display a window and then quit.
> #-----------------------------------------------
> import sys
> import time
> import pygame
> 
> pygame.init()
> screen = pygame.display.set_mode((640,480))
> pygame.display.set_caption("A Bug's Life")
> time.sleep(4)
> #-----------------------------------------------

Two problems here - first is that you should always call 
pygame.display.quit() when done. The second is that if you sleep(4) 
you've effectively blocked off the event loop for that process, which 
makes Windows unhappy. Even clicking 'close' to close the window won't 
work. Your very dumbest pygame program should have a loop like:

	while pygame.event.poll().type != KEYDOWN:
		pygame.time.delay(10)

Which just does nothing (but pumps the event loop) until a key is 
pressed, then exits.

Or you could add up the spent time and bail when it hits four seconds, or 
whatever you want, but you should be doing something with the 
pygame.event loop. And then call the pygame.display.quit() when done of 
course.




From lothar at ultimathule.nul  Mon Apr  4 12:20:05 2005
From: lothar at ultimathule.nul (lothar)
Date: Mon, 4 Apr 2005 16:20:05 -0000
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com><20611953.SkRsez8GTE@news.perlig.de><11516i9g0usp235@corp.supernews.com>
	<d2qnf5$a1b$1@news.web.de>
Message-ID: <1152q99c7pjjl04@corp.supernews.com>

how then, do i specify a non-greedy regex
  <1st-pat><not-1st-pat>*?<follow-pat>

that is, such that non-greedy part <not-1st-pat>*?
excludes a match of <1st-pat>

in other words, how do i write regexes for my examples?

what book or books on regexes or with a good section on regexes would you
recommend?
Hopcroft and Ullman?


"Andr? Malo" <auch-ich-m at g-kein-spam.com> wrote in message
news:d2qnf5$a1b$1 at news.web.de...
> * "lothar" <lothar at ultimathule.nul> wrote:
>
> > this response is nothing but a description of the behavior i reported.
>
> Then you have not read my response carefully enough.
>
> > as to whether this behaviour was intended, one would have to ask the
module
> > writer about that.
>
> No, I've responded with a view on regexes, not on the module. That is the
way
> _regexes_ work. Non-greedy regexes do not match the minimal-length at all,
they
> are just ... non-greedy (technically the backtracking just stacks the
longest
> instead of the shortest). They *may* match the shortest match, but it's a
> special case. Therefore I've stated that the documentation is incomplete.
>
> Actually your expectations go a bit beyond the documentation. From a
certain
> point of view (matches always start most left) the matches you're seeing
> *are* the minimal-length matches.
>
> > because of the statement in the documentation, which places no
qualification
>
^^^^^^^^^^^^^^^^
>                                                               that's the
point.
>
> > on how the scan for the shortest possible match is to be done, my guess
is
> > that this problem was overlooked.
>
> In the docs, yes. But buy yourself a regex book and learn for yourself ;-)
> The first thing you should learn about regexes is that the source of pain
> of most regex implementations is the documentation, which is very likely
> to be wrong.
>
> Finally let me ask a question:
>
> import re
> x = re.compile('<.*?>')
> print x.search('<title>...</title><body>...</body>').group(0)
>
> What would you expect to be printed out? <title> or <body>? Why?
>
> nd






From ivoras at something.ortheother  Sat Apr 23 21:15:02 2005
From: ivoras at something.ortheother (Ivan Voras)
Date: Sun, 24 Apr 2005 03:15:02 +0200
Subject: Unicode problems, yet again
Message-ID: <d4eruk$gns$1@bagan.srce.hr>

I have a string fetched from database, in iso8859-2, with 8bit 
characters, and I'm trying to send it over the network, via a socket:

   File "E:\Python24\lib\socket.py", line 249, in write
     data = str(data) # XXX Should really reject non-string non-buffers
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0161' in 
position 123: ordinal not in range(128)

The other end knows it should expect this encoding, so how to send it?

(Does anyone else feel that python's unicode handling is, well... 
suboptimal at least?)


From tjreedy at udel.edu  Wed Apr 27 02:48:51 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 27 Apr 2005 02:48:51 -0400
Subject: parse tree has symbols not in the grammar?
References: <d4n2c7$sj1$1@sea.gmane.org>
Message-ID: <d4ncag$ill$1@sea.gmane.org>


"Chad Whitacre" <chad at zetaweb.com> wrote in message 
news:d4n2c7$sj1$1 at sea.gmane.org...
> I've been playing around with the parser module, and based on the 
> documentation I would expect all symbols in a parse tree to be part of 
> the grammar.[1] For example, I find this line in the symbol module docs:
>
>   Refer to the file Grammar/Grammar in the Python distribution for the
>   definitions of the names in the context of the language grammar.[2]
>
> However, the program below gives me a human-readable parse tree (also 
> below) that contains symbols that don't seem to be in the grammar, e.g., 
> small_stmt, expr_stmt, factor. Is my expectation wrong?

Did you not find them in grammar.txt, which you referenced, or 
Grammar/Grammar is the source, which you did not.  Guido has said that the 
grammar in the ref manual, meant for human consumption, is equivalent to 
but not quite the same as the grammar used to generate the parser, which 
has to meet LL1 constraints.

> [1] http://python.org/doc/ref/grammar.txt
> [2] http://python.org/doc/lib/module-symbol.html

Terry J. Reedy





From n.20.e5ke at spamgourmet.com  Thu Apr 21 19:35:59 2005
From: n.20.e5ke at spamgourmet.com (Esben Pedersen)
Date: Fri, 22 Apr 2005 01:35:59 +0200
Subject: New line
In-Reply-To: <42680edf_3@mk-nntp-2.news.uk.tiscali.com>
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
	<mailman.2246.1114115139.1799.python-list@python.org>
	<42680edf_3@mk-nntp-2.news.uk.tiscali.com>
Message-ID: <42683912$0$79453$14726298@news.sunsite.dk>

ionic wrote:
> Ok sorry guys,
> 
> using the python gui, if i hit the 'enter' key python just executes what
> ever ive typed.  It doesnt take me to the next line.

try shift + enter

/Esben


From cesarpolar at gmail.com  Tue Apr 19 13:28:36 2005
From: cesarpolar at gmail.com (Cesar)
Date: 19 Apr 2005 10:28:36 -0700
Subject: gc.DEBUG_LEAK and gc.garbage
Message-ID: <d8768f2d.0504190928.35411d46@posting.google.com>

Hi,

I am new with python, and I am having a look to program that leaks.
The first thing I have to do is to determine if what leaks it is the
python code of my company.

I have set the DEBUG_LEAK flag with the GC and in the program cycle
printed the length of the garbage list. Is this enough to determine if
there is a leak in the python code? (the value rises). I am not
totally sure (see below).

I played with other flags as DEBUG_SAVEALL, but I think they are not
useful for what I want.

Finally, in this group I have seen a reference to an article in which
they had the look to gc.garbage after calling explicitally to
gc.collect(). is this necessary?

Thanks, Cesar


From mwm at mired.org  Fri Apr 22 02:11:05 2005
From: mwm at mired.org (Mike Meyer)
Date: Fri, 22 Apr 2005 01:11:05 -0500
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com> <116fhpmid1q0j2b@corp.supernews.com>
	<d48h8f$i2d$1@panix2.panix.com> <116fp7e9sf1uj41@corp.supernews.com>
Message-ID: <86zmvrs5mu.fsf@guru.mired.org>

Grant Edwards <grante at visi.com> writes:

> On 2005-04-21, Roy Smith <roy at panix.com> wrote:
>> Grant Edwards  <grante at visi.com> wrote:
>>>Sure, but what about the case where his program is on paper
>>>tape and all he has for an editor is an ice pick?
>>
>> Can't you emulate that in emacs with M-X inclusive-or-overwrite-mode?
>
> Heck, emacs probably has a "paper-tape-mode" where it displays
> the file like this:
>
>   ooo.oooo
>   ooo.oooo
>   ooo.oooo
>   ooo.oooo
>   o o.o  o
>   o o.oo
>    oo.  oo
>   o  .oo o
>   ooo.oooo
>     o.oo
>    oo.oo o
>   o o.o oo
>   o  .ooo

I can't find it in Emacs. On the other hand:

guru% /usr/games/ppt emacs rulez!
___________
| oo  .o o|
| oo o.o o|
| oo  .  o|
| oo  . oo|
| ooo . oo|
| ooo . o |
| ooo .o o|
| oo o.o  |
| oo  .o o|
| oooo. o |
|  o  .  o|
___________
guru% 

and

guru% /usr/games/bcd vi rulez!
 ________________________________________________
/VI                                              |
| ]                                              |
|                                                |
|]                                               |
|111111111111111111111111111111111111111111111111|
|222222222222222222222222222222222222222222222222|
|333333333333333333333333333333333333333333333333|
|444444444444444444444444444444444444444444444444|
|]55555555555555555555555555555555555555555555555|
|666666666666666666666666666666666666666666666666|
|777777777777777777777777777777777777777777777777|
|888888888888888888888888888888888888888888888888|
|9]9999999999999999999999999999999999999999999999|
|________________________________________________|
 ________________________________________________
/RULEZ!                                          |
|   ]                                            |
|] ]                                             |
| ]  ]]                                          |
|111111111111111111111111111111111111111111111111|
|222222222222222222222222222222222222222222222222|
|33]333333333333333333333333333333333333333333333|
|4]4444444444444444444444444444444444444444444444|
|555]55555555555555555555555555555555555555555555|
|666666666666666666666666666666666666666666666666|
|77777]777777777777777777777777777777777777777777|
|88888]888888888888888888888888888888888888888888|
|]999]9999999999999999999999999999999999999999999|
|________________________________________________|
guru% 

and just for grins:

guru% /usr/games/morse ed rulez!
 dit
 dah dit dit

 dit dah dit
 dit dit dah
 dit dah dit dit
 dit
 dah dah dit dit
 dit dit dah dah dit

guru% 

So adding paper-tape mode to emacs shouldn't be all that hard.

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From gja at cc.usu.edu  Thu Apr  7 11:31:16 2005
From: gja at cc.usu.edu (Greg)
Date: 7 Apr 2005 08:31:16 -0700
Subject: Read 16 bit integer complex data
Message-ID: <1112887876.272539.277420@z14g2000cwz.googlegroups.com>

Hi,

I'm new to python, I don't have a whole lot of programming experience
aside from Matlab.  I hope you'll excuse my ignorance.

I'm trying to figure out how to read in 16 bit integer complex data.
Each 16 bits alternate, first 16 bits represent the real part of the
number, next 16 bits represent the imaginary.

I've looked at the "unpack" command, but from what I can tell it isn't
really efficient for a large data sample.

Is there a command or method around to read in large amounts of 16 bit
complex data?

Thanks in advance for your help,

Greg



From saint.infidel at gmail.com  Tue Apr  5 16:56:17 2005
From: saint.infidel at gmail.com (infidel)
Date: 5 Apr 2005 13:56:17 -0700
Subject: oracle interface
In-Reply-To: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <1112734577.303577.51250@g14g2000cwa.googlegroups.com>

cx_Oracle rocks



From cam.ac.uk at mh391.invalid  Sat Apr  9 05:44:31 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 09 Apr 2005 10:44:31 +0100
Subject: change the date string into timestamp
In-Reply-To: <mailman.1610.1113039505.1799.python-list@python.org>
References: <mailman.1610.1113039505.1799.python-list@python.org>
Message-ID: <d3885v$u5$1@gemini.csx.cam.ac.uk>

praba kar wrote:

> In Php strtotime() will change a date
> string into timestamp.  I want to know which 
> python function will  change a date string
> into timestamp.

What do you mean by "a timestamp?"
-- 
Michael Hoffman


From fredrik at pythonware.com  Sun Apr 10 18:14:01 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 00:14:01 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com>	<4258e5e6$0$3407$9b622d9e@news.freenet.de><mailman.1647.1113160640.1799.python-list@python.org>
	<425999BD.7050308@v.loewis.de>
Message-ID: <d3c88t$r27$1@sea.gmane.org>

Martin v. L?wis wrote:

> I can see why you are not willing to do some of these things. But
> I can't see why that is for other things. For example, why are you
> not willing to license your contribution to the PSF (nobody asks
> you to "sign it over")?

Because the software already has a license?

I'm not talking about things that absolutely have to be in the Python
interpreter core; I'm talking about things that *could* be bundled
with the standard distribution, *without* having to be relicensed,
or be forever maintained by the CPython developers.

(the Linux distributors know how to do this: look for good stuff that's
either actively maintained or simple and solid enough to live for a while,
make sure the licenses are good enough, bundle the latest and greatest
version, ship tested versions at regular intervals, update when necessary,
and pass bugs and patches upstream.  why not use the same approach
for Python's standard distribution?)

> As for "losing control" - you seem to have a notion of control that
> truly makes it difficult to contribute to Python.

Why does "contributing to Python" have to mean that a developer
can no longer control the design and implementation of a module he
or she has written?  What if the target audience is larger than users
of the latest CPython release, for example?

> I don't think Python should change

As things are today, 3-4 developers do about 50% of all check-ins to
the python core *and* the standard library.  One of those work mainly
on the documentation.   Are you sure today's approach is the best way
to give the users the best possible standard distribution?  Why?

</F> 





From sizelji at insightbb.com  Tue Apr 26 09:31:41 2005
From: sizelji at insightbb.com (Jim Sizelove)
Date: Tue, 26 Apr 2005 13:31:41 GMT
Subject: key binding with mac
In-Reply-To: <Ztibe.1433$zu.846@newssvr13.news.prodigy.com>
References: <Ztibe.1433$zu.846@newssvr13.news.prodigy.com>
Message-ID: <426E42BA.1000201@insightbb.com>

Eric Texier wrote:
> I am just starting to use python on the mac.
> How do I get backspace, the arrows up/down and all the control like
> ctrl-a to work nicely under the console.
> for now I am getting a bunch of ^? ^[[A when I use any tcsh type of 
> control.
> thanks,

I believe you need to install readline support.  You can get it through
http://pythonmac.org/packages
or via fink.

You will find the Pythonmac-SIG mailing list very helpful for questions 
about Python on the Macintosh.  You can learn more at:
http://www.python.org/sigs/pythonmac-sig/

HTH,
Jim Sizelove


From deetsNOSPAM at web.de  Sat Apr 23 09:43:36 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 23 Apr 2005 15:43:36 +0200
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<116inf1aivjgd28@corp.supernews.com>
	<1114205820.773917.70820@f14g2000cwb.googlegroups.com>
	<116is1or7an6735@corp.supernews.com>
Message-ID: <d4dje8$ebt$02$3@news.t-online.com>

> You're use of the word "driver" is one with which I'm not
> familiar.  But I don't really "do windows" so it's probably a
> Widnowism.

It could be that he means that creating PDFs on windows is done using a fake
printer that will produce the pdf when being printed to - and that fake
printer is implemented as a driver.

And traditionally in printing one often speaks of printer drivers - even if
they are mere filters that can't be considered drivers in the kernel driver
way.
-- 
Regards,

Diez B. Roggisch


From ruach at chpc.utah.edu  Fri Apr  8 11:30:25 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 09:30:25 -0600
Subject: Can dictionary values access their keys?
Message-ID: <d3682h$qom$1@vegh.ks.cc.utah.edu>

This may be a very rudimentary question, but here goes:

If I have a simple dictionary, where the value is a class or function,
is there an interface through which it can discover what its key is?
Similar to index() for list.

For a list, assuming I new what the parent list was I could do something
like this.

>>> class child:
...     def get_parent_index(self, parent):
...             return parent.index(self)
...
>>> a = child()
>>> l = [a]
>>> b = l[0]
>>> b.get_parent_index(a)
>>> b.get_parent_index(l)
0

Is there a way to do something like that with dicts?


On a similar note, if one object is part of another, is there a way for
the 'child' obj to discover what/who the 'parent' object is? That way
parent does not have to be explicityly passed to get_parent_index?

The idea is like this:

>>> class child:
...     def get_parent_index(self):
		parent = self.magic_parent_discovery()
...             return parent.index(self)
...



Thanks much
--
Matthew


From rakesh_usenet at yahoo.com  Fri Apr  1 01:40:53 2005
From: rakesh_usenet at yahoo.com (Rakesh)
Date: 31 Mar 2005 22:40:53 -0800
Subject: dictionary: sorting the values preserving the order
Message-ID: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>

Hi,
  For a particular problem of mine, I want to sort <key, value> pairs
by its value.

Eg:

Input:

A, 4
B, 5
C, 1
D, 2
E, 3

I would like the output to be:

C
D
E
A
B

i.e. I would like to get the keys in the sorted order of values.

I did google around a little bit. One solution to a similar problem
suggested is:

# Courtesy:
http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52306
def sortedDictValues3(adict):
    keys = adict.keys()
    keys.sort()
    return map(adict.get, keys)

This gets a list sorted by the keys. How would I get a revised
dictionary 
sorted by its values.



From usenet at gungfu.de  Sun Apr 24 11:35:59 2005
From: usenet at gungfu.de (=?iso-8859-1?q?Steffen_Gl=FCckselig?=)
Date: 24 Apr 2005 08:35:59 -0700
Subject: Question on metaclasses
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
	<1114353460.225361.238720@g14g2000cwa.googlegroups.com>
	<3d1piaF6q2idjU1@individual.net>
Message-ID: <1114356959.125957.325640@z14g2000cwz.googlegroups.com>

So dct is something like a template rather than the __dict__ of the
actual class?

I'd assume that changing the content of a dict would be possible even
after it has been assigned to some object (here, a class).


thanks and best regards
Steffen



From bogus@does.not.exist.com  Wed Apr  6 15:55:02 2005
From: bogus@does.not.exist.com ()
Date: Wed, 06 Apr 2005 19:55:02 -0000
Subject: (no subject)
Message-ID: <mailman.47.1572218121.3356.python-list@python.org>

#! rnews 2135
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: Best editor?
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqx7jjfhf5r.fsf at cola2.ca.boeing.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Lines: 49
Sender: hgg9140 at cola2.ca.boeing.com
Organization: The Boeing Company
References: <1112725379.514651.66540 at l41g2000cwc.googlegroups.com> <xqxll7wougu.fsf at cola2.ca.boeing.com> <mailman.1437.1112801727.1799.python-list at python.org> <1112805967.208689.96100 at o13g2000cwo.googlegroups.com>
Mime-Version: 1.0
Date: Wed, 6 Apr 2005 19:35:28 GMT
Xref: news.xs4all.nl comp.lang.python:371180

"ChinStrap" <caneff at gmail.com> writes:

> Well I would be more than willing to learn Emacs if it does all these
> things you speak of, but really I can't get started because the default
> scheme is so friggin ugly it isn't funny.
> 
> Anyone want to send me a configuration setup with Python in mind, and
> decent colors?
> 

Set .emacs for:
;;; basic
(set-background-color "white")
(set-foreground-color "black")
(set-border-color "black")
(setq column-number-mode t)
(setq dired-ls-F-marks-symlinks t)

Do that prior to the python settings:
;---python---------------------------
(load "python-mode")
(setq auto-mode-alist
      (cons '("\\.py$" . python-mode) auto-mode-alist))
(setq interpreter-mode-alist
      (cons '("python" . python-mode)
            interpreter-mode-alist))
(autoload 'python-mode "python-mode" "Python editing mode." t)
(add-hook 'python-mode-hook 'turn-on-font-lock)
(setq python-mode-hook 'python-initialise)
(defun python-initialise ()
  (interactive)
  (setq default-tab-width 4)
  (setq indent-tabs-mode nil)
)


Then the default color scheme looks ok (at least to me).
The critical command is:
(add-hook 'python-mode-hook 'turn-on-font-lock)

If you comment that out (with a leading ";"), then font coloring is
turned off and you just have black on white.  You can learn the
language and the editor in that mode if necessary.


-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718
#! rnews 1727
Xref: xyzzy comp.security.ssh:39215
Newsgroups: comp.security.ssh
Path: xyzzy!nntp
From: "Mike Lowery" <michael.j.lowery at boeing.com>
Subject: Re: Ignoring known_hosts
X-Nntp-Posting-Host: e458612.nw.nos.boeing.com
Message-ID: <IEJIG6.L3M at news.boeing.com>
X-Mimeole: Produced By Microsoft MimeOLE V6.00.2800.1441
X-Priority: 3
X-Msmail-Priority: Normal
Lines: 33
Sender: nntp at news.boeing.com (Boeing NNTP News Access)
Organization: The Boeing Company
X-Newsreader: Microsoft Outlook Express 6.00.2800.1437
References: <IEA950.D3r at news.boeing.com> <m2psxdzzho.fsf at darwin.oankali.net> <IEHE76.3Dp at news.boeing.com> <m2br8szd6w.fsf at darwin.oankali.net>
Date: Wed, 6 Apr 2005 19:36:09 GMT


"Richard E. Silverman" <res at qoxp.net> wrote in message
news:m2br8szd6w.fsf at darwin.oankali.net...
> >>>>> "Mike" == Mike Lowery <michael.j.lowery at boeing.com> writes:
>
>     >> [~/.ssh/known_hosts]
>     >>
>     >> foo [foo's key ...]  bar [foo's key ...]
>     >>
>     >> [~/.ssh/config]
>     >>
>     >> host foo hostname <foo's name or address> hostkeyalias foo
>     >>
>     >> host bar hostname <bar's name or address> hostkeyalias bar
>     >>
>     >> ... and use "ssh {foo|bar}".
>
>     Mike> This might work
>
> It will work.
>
>     Mike> but again, it requires me manually adding each server to the
>     Mike> config file which I'm hoping to avoid since there are many.
>
> How?  If your machines are not uniquely identified to the client by their
> names or addresses, then you must indicate the distinctions yourself by
> configuration.

How?  Tell SSH to stop checking for this potential "problem." I don't care that
the key doesn't match what it was last time, just give me access!  Apparently
that option doesn't exist.




From neuhauser+python-list#python.org at sigpipe.cz  Mon Apr  4 20:02:15 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Tue, 5 Apr 2005 02:02:15 +0200
Subject: Super Newbie Question
In-Reply-To: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
References: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>
Message-ID: <20050405000215.GA14200@isis.sigpipe.cz>

# joeyjwc at gmail.com / 2005-04-04 16:39:27 -0700:
> In short, how might I go about deleting just the contents of a file?
> I tried several methods with my limited knowledge but had no luck.

    fd = open("your-file")
    fd.truncate()
    fd.close()

    or open("your-file", "w").close()
 
-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From prasad83.a at gmail.com  Tue Apr 26 09:32:15 2005
From: prasad83.a at gmail.com (prasad)
Date: 26 Apr 2005 06:32:15 -0700
Subject: How to exctract title of links
In-Reply-To: <426e31e9$0$12342$626a14ce@news.free.fr>
References: <426e31e9$0$12342$626a14ce@news.free.fr>
Message-ID: <1114522335.300104.262680@o13g2000cwo.googlegroups.com>

import htmllib, formatter, urllib
class x(htmllib.HTMLParser):
    inanchor = True # indicates whether we are inside anchor element
    def dump(self, tag, attrs):
        #print tag,
        for a, v in attrs:
            if a in ['a', 'src', 'href']:
                print v,


        print
    #def do_img(self, attrs):
    #    self.dump('img', attrs)
    def start_a(self, attrs):
        self.dump('a', attrs)
        self.inanchor = True # yes now we are in anchor element


    def handle_data(self,data):
        if self.inanchor:
            print data # lets us print the anchor element inner data
            self.inanchor = False # we handled the anchor element data
            # this is not a nice way, self.inanchor should be set false

            # when </a> is reached. try in end_a(self) ...


    #def start_form(self, attrs):
    #    self.dump('form', attrs)

y = x(formatter.NullFormatter())
y.feed(urllib.urlopen('http://www.aquabase.org/fish/dump.php3').read())
y.close()



From vze4rx4y at verizon.net  Wed Apr  6 23:05:26 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 07 Apr 2005 03:05:26 GMT
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<6p1951pop1pfh3j57r7gg568cn3bo4c7lg@4ax.com>
Message-ID: <Wr15e.5248$7b.3507@trndny06>

[John Machin]
> 2. Without a definition that refers only to to the input and output,
> one would have to say that "interchange" implies "event" and so the
> number of interchanges would depend on the sorting method.

As the dataset contains no duplicates, the parity will be the same irrespective
of sorting method.

> 3. Of what practical use (or even esoteric academic interest) is the
> parity of the number of interchanges?

I presume the goal is academic, determining whether a permutation is a member of
the alternating group of even permutations (A4, A5, ...).  For some problems,
that is a useful invariant.  For instance, iirc, the parity determines whether a
given 15 puzzle arrangement is solvable.


Raymond




From miki.tebeka at zoran.com  Tue Apr 26 13:48:52 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Tue, 26 Apr 2005 20:48:52 +0300
Subject: Howto debug c++ (SWIG) extension under Windows
In-Reply-To: <d4l0ah$hqe$01$1@news.t-online.com>
References: <d4l0ah$hqe$01$1@news.t-online.com>
Message-ID: <20050426174852.GK1168@zoran.com>

Hello Alexander,

> I can't figure out howto debug my c++ extension. If i compile it as 
> release version, I've of course no chance to set a breakpoint.
This is not true. You *can* set breakpoints in release mode, make sure to
add debug information to your release build so you'll be able to see the
sources.
There are several cases (such as inlined functions) that you *can't* set
breakpoint to.

> If I > compile as debug I get the Error-window:
> 
> ... missing MSVCR71D.dll ...
Just copy it (and msvcp71d.dll) from your c:\windows\system32 (or wherever
your windows is installed) to the "Debug" library (or to the Python install
library).

> 1) Is it possible to debug a C++ extension in that environment anyhow ?
Yes. See above.

> 2) How do I have to setup the development environment in that I can debug ?
Just as above again.

If you still can't stop try "forcing" breakpoints using
    __asm int 3
in your code. This way you can even run it out of MSDEV and you'll get a
message box when the "breakpoint" it hit. Just open the debugger on it.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys

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From vze4rx4y at verizon.net  Wed Apr  6 21:02:25 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Thu, 07 Apr 2005 01:02:25 GMT
Subject: sorting a list and counting interchanges
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
	<1112835544.302702.294570@z14g2000cwz.googlegroups.com>
Message-ID: <BE%4e.106$4v3.27@trndny03>

[Jordan Rastrick]
> Unless I'm mistaken, this doesnt quite work, because it switches the
> parity of phase every time a comparison is made, rather than every time
> a swap is made. So:
>
> # <untested>
> phase = 1
> def mycmp(x,y):
>    global phase
>    c = cmp(x,y)
>    if c > 0: # i.e. a swap will be performed in the sort
>        phase = -phase
>    return c

You're right.  An important test was omitted.


Raymond




From fuzzyman at gmail.com  Mon Apr 25 04:25:44 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 25 Apr 2005 01:25:44 -0700
Subject: HTML cleaner?
In-Reply-To: <d4h9uv$cge$1@bagan.srce.hr>
References: <d4h9uv$cge$1@bagan.srce.hr>
Message-ID: <1114417544.162192.135250@g14g2000cwa.googlegroups.com>

I *just* wrote something that does this. It uses the htmldata module -
you can find that using pypi.  It only allows a specific set of html
tags and attempts to close tags not closed. :

from htmldata import tagextract, tagjoin
allowed_tags = ['br', 'b', 'strong', 'em', 'i', 'u', 'tt', 'a', 'big',
'small',
               'h2', 'h3', 'h4', 'strike', 'sub', 'sup', 'samp', 's',
'code', 'ins',
               'br/',
               ]
def htmlfilter(intext, allowed_tags=allowed_tags):
   """Given a text entry as input, check it only contains allowed html.

   It returns the text with banned html removed.
   Uses two functiosn from htmldata :
       from htmldata import tagextract, tagjoin
   allowed_tags is the list of tags that are allowed.
   """
   html = tagextract(intext)   #
   out_html = []
   skip = None
   unclosed = []
   for entry in html:
       if isinstance(entry, basestring):
           if skip is not None:
               continue
           out_html.append(entry)
       else:
           tag = entry[0]
           if skip is not None:
               if tag.startswith('/') and tag[1:] == skip:
                   skip = None
               continue
           otag = tag
           if tag.startswith('/'):
               otag = tag[1:]
           if otag in allowed_tags:
               if tag.startswith('/'):
                   if otag in unclosed:
                      unlclosed.remove(otag)
                   else:   # bad html
                       continue
               elif tag not in ['br', '/br', 'hr', '/hr', 'img',
'/img']:      #  XXXX hardwired - what if we need to add to this ?
                   unclosed.append(tag)
               out_html.append(entry)
               continue
           if not tag.startswith('/'):
               skip = tag
   for tag in unclosed:
       out_html.append(('/%s' % (tag,), {}))   # close any unclosed
tags
   return tagjoin(out_html)


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

I've used it to allow a few html tags to appear in my guestbook
entries. It's not very sophisticated because complex tags like 'div'
and tables aren't allowed.

Best regards,

Fuzzy
http://www.voidspace.org.uk/python



From dcrespo at gmail.com  Tue Apr 26 17:50:13 2005
From: dcrespo at gmail.com (dcrespo)
Date: 26 Apr 2005 14:50:13 -0700
Subject: cross platform printing - using a GUI ?
In-Reply-To: <JMbbe.274$gd5.215@newssvr12.news.prodigy.com>
References: <0hx4e.3479$3O2.2184@trnddc01>
	<mVa5e.6469$6k4.803027@news20.bellglobal.com>
	<1GYae.2601$Nc.903@trnddc05>
	<JMbbe.274$gd5.215@newssvr12.news.prodigy.com>
Message-ID: <1114552213.334650.68120@o13g2000cwo.googlegroups.com>

Had you used it?

Daniel



From bill.mill at gmail.com  Fri Apr 15 10:54:56 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Fri, 15 Apr 2005 10:54:56 -0400
Subject: A little request about spam
In-Reply-To: <d3fd6366050414085511cc9c31@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
	<c1169f9605041407027a785a4f@mail.gmail.com>
	<d3fd6366050414085511cc9c31@mail.gmail.com>
Message-ID: <797fe3d405041507542949edd4@mail.gmail.com>

On 4/14/05, mark hellewell <mark.hellewell at gmail.com> wrote:
> On 4/14/05, Steven Cummings <estebistec at gmail.com> wrote:
> > For what it's worth I filed a gmail issue over it a few days after I noticed
> > it. I guess more of you could do so indicating the severity of the issue to
> > the gmail developers. And I thought I was the only one...!
> 
> I've now done the same. Let's hope they can do something about it,
> it is a little annoying!
> 

Anyone else think the gmail team (or one of their bosses) reads c.l.p?
The problem is gone this morning. Here's to b*tching on c.l.p actually
solving something <raises glass>!

Peace
Bill Mill
bill.mill at gmail.com


From littlejohn.75 at news.free.fr  Sat Apr 23 16:15:03 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 23 Apr 2005 20:15:03 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
	<IFEpEp.7Gz@bath.ac.uk> <426A76A5.2050906@mage.hu>
	<mailman.2348.1114278117.1799.python-list@python.org>
Message-ID: <426aacc7$0$8873$636a15ce@news.free.fr>

Le Sat, 23 Apr 2005 19:11:19 +0200, Fredrik Lundh a ?crit :
> in PHP, good programmers are able to write bad programs without
> even noticing.

+1 QOTW

--- 
The use of COBOL cripples the mind; its teaching should, therefore, be
regarded as a criminal offense.
Dr. E.W. Dijkstra


From apardon at forel.vub.ac.be  Thu Apr 21 03:21:23 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 07:21:23 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2180.1114010770.1799.python-list@python.org>
Message-ID: <slrnd6el3j.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Terry Hancock schreef <hancock at anansispaceworks.com>:
> On Wednesday 20 April 2005 07:52 am, Antoon Pardon wrote:
>> Personnaly I would like to have the choice. Sometimes I prefer to
>> start at 0, sometimes at 1 and other times at -13 or +7.
>
> Although I would classify that as a "rare use case".  So, it "ought
> to be possible to do it, but not necessarily easy".

The -13 and +7 may be rare cases, but I wouldn't call one as a
start index a rare case. I often get data in files where each line
is a record with delimited fields. When I ask which field contains
certain data, I get an answer that depends on counting starting
with one. So starting with one as index would seem the more natural
choice here.

As far as I'm concerend, 0 as a starting index is a rare use
case. In the programs I write about 45% is a natural 1 for
first index, about 50% is a don't care and 5% is a natural
0 first index and some fraction is others. So yes in most
of my programs 0 as a starting index works fine, but that
is because in a lot of programs it doesn't matter much
which would be the first index.

Now I can understand that for others the 0 as a natural
start index is more frequent, but if we have two frequent
use cases, it seems to me the language should provide the
choice more easily as it does now.

-- 
Antoon Pardon


From jerf at jerf.org  Sat Apr 23 13:11:26 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 23 Apr 2005 13:11:26 -0400
Subject: Python Imaging Library and PyGTK - color image path?
References: <pan.2005.04.23.02.43.12.576815@jerf.org>
	<mailman.2340.1114244448.1799.python-list@python.org>
Message-ID: <pan.2005.04.23.17.11.25.897868@jerf.org>

On Sat, 23 Apr 2005 10:20:29 +0200, Fredrik Lundh wrote:
> which discusses draw_rgb_image and friends, and says that "if you can
> convert your PIL image to a  pixel data string or buffer object, you could
> use them to display the image".  here's some code that seems to do exactly
> that:
> 
>     http://www.mail-archive.com/pygtk at daa.com.au/msg07167.html
> 
> (but maybe this is some kind of stupid "a bitmap isn't a pixmap isn't an
> image" thing?  if so, I suggest getting a modern windowing system ;-)

A varient; I was missing the gdk.pixbuf because I assumed that because
there was a gtk.pixbuf that I knew about, that I had all relevant data.
Were that the only pixbuf, that would be an atrocity. (Particularly odd
for GTK, the *Gimp* windowing toolkit.)

(It of course figures that was the google search; I think I tried
everything but that; "python imaging library" "pygtk" isn't anywhere near
as helpful, for instance.)


From phillip.watts at anvilcom.com  Fri Apr 29 15:01:04 2005
From: phillip.watts at anvilcom.com (phil)
Date: Fri, 29 Apr 2005 14:01:04 -0500
Subject: Tkinter weirdness item count
Message-ID: <42728470.2050103@anvilcom.com>

Using Tkinter Canvas to teach High School Geometry
with A LOT of success.

My drawing gets very slow after a lot of actions.

For instance I have created code to rotate a set of objects
about a rotation point.
rotate 360 degrees starts to get slow
after 720 degrees its crawling.

I checked the item list with with find_all: IT GROWS!

OK, I create 3 lines using a line Class I created.
When I rotate these 3 lines thru 360 degrees it creates
360 lines times 3. But each new instance of line REPLACES
the old instance.  The line class has a destructor to delete
the drawn object.

class line:
	count = 0
	def __init__(s,glob,argl,color=''):
	    line.count = line.count + 1
             ##
             ## buncha code here
             ##
	    s.obj = glob.can.create_line(x0,y0,x1,y1,
					width=glob.width,fill=s.color)
	def __del__(s):
	    line.count = line.count - 1
	
             ## delete the line object if the
	    ## class instance is deleted
             s.glob.can.delete(s.obj)


After the rotation I check line.count and it is 3
But find_all returns a tuple ofover 1000 items.
The drawn objects are not being deleted.
Which is kinda weird because the rotation works.
That is they appear to be deleted.

Is find_all() fooling me?
Is this the reason drawing slows down? Is it refreshing
invisible objects?

This slowing down also occurs when I draw a lot of objects.
Lets say I draw a sine wave, say 1000 individual points.
If I draw 4 or 5 sine waves it gets really slow.

I should mention I call update() after each drawing action.
This is necessary for the students to watch the progress.
I might be drawing objects in a lengthy loop and without
update() they only appear at the end of the loop.

Thanks for any help.

-- Confused




From ville at spammers.com  Thu Apr 14 02:33:43 2005
From: ville at spammers.com (Ville Vainio)
Date: 14 Apr 2005 09:33:43 +0300
Subject: templating system
References: <mailman.1644.1113148510.1799.python-list@python.org>
	<ho-dnRDXra5RSMTfRVn-qQ@speakeasy.net>
	<mailman.1669.1113204074.1799.python-list@python.org>
	<196dnbltDvtpFsHfRVn-uA@speakeasy.net>
Message-ID: <du7hdi9g94o.fsf@lehtori.cc.tut.fi>

>>>>> "Erik" == Erik Max Francis <max at alcyone.com> writes:

    Erik> All I meant by that note was that EmPy was not primarily
    Erik> designed for blazing speed; that is, it could easily be made
    Erik> much more efficient in a lot of ways.  I've never had a need

It would be interesting to see benchmarks comparing different
templating system. I suppose a web templating system like PSP (of
mod_python) would be optimized for speed.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From upperbear at gto.net  Thu Apr  7 17:38:19 2005
From: upperbear at gto.net (Bearish)
Date: Thu, 07 Apr 2005 17:38:19 -0400
Subject: 'Address already in use' when using socket
Message-ID: <87wtretghg.fsf@gto.net>

I get 'Address already in use' errors when using sockets.
Am I properly shutting down all connections? What am I doing wrong?
I've looked at the examples and I can't figure out what I'm missing.
I already read the Python Socket HOWTO at
http://py-howto.sourceforge.net/sockets/sockets.html
but I seem to be doing everything right.

Here is the server:

#! /usr/bin/python
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('localhost', 52340))
s.listen(1)
conn, addr = s.accept()
data = conn.recv(1024)
print "data:", data
conn.close()
s.close()
print "server closed"

Here is the client:

#! /usr/bin/python
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost', 52340))
s.send('test string')
s.close()
print "client closed"

Here is a convenience script to run both
(although I get the same error when I run in separate shells):

#! /bin/sh
python server.py &
sleep 1
python client.py

Here is the error:

--- first time, runs just fine ---
$ source ./runboth
data: test string
server closed
client closed
[1]+  Done                    python server.py
--- second time (or sometimes third time), gives error ---
$ source ./runboth
Traceback (most recent call last):
  File "server.py", line 4, in ?
    s.bind(('localhost', 52340))
  File "<string>", line 1, in bind
socket.error: (98, 'Address already in use')
[1]+  Exit 1                  python server.py
Traceback (most recent call last):
  File "client.py", line 4, in ?
    s.connect(('localhost', 52340))
  File "<string>", line 1, in connect
socket.error: (111, 'Connection refused')


From Bill at SynectixLtd.com  Mon Apr 18 08:08:50 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Mon, 18 Apr 2005 12:08:50 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
Message-ID: <d4080i$q8d$1@titan.btinternet.com>

I downlaoded and installed 
http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi

I'm trying to build an extension using SWIG 1.3.24 and the linker needs
python24_d.lib (I do not have the DLL either).  I've not found it in any of 
the
downloads.

So I tried to download the source to build it myself.  Of
http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tar.bz2 and
http://www.python.org/ftp/python/2.4.1/Python-2.4.1.tgz, WinZip (9.0 SR1)
just says "Error reading header after processing 0 entries".

Additionally, I've had no joy downloading the unzipper
(ftp://sources.redhat.com/pub/bzip2/v102/bzip2-102-x86-win32.exe) from the
site cited for the unzipper (http://sources.redhat.com/bzip2/).  It flashed 
up a
black console window momentarily.

Oh, this is sooooo frustrating! :-(

Can anyone point me in the right direction?

And then I can get to grips with my work.

tia
    Bill




From jarrod.roberson at gmail.com  Fri Apr 15 20:14:30 2005
From: jarrod.roberson at gmail.com (fuzzylollipop)
Date: 15 Apr 2005 17:14:30 -0700
Subject: Determine ip address
In-Reply-To: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
References: <1113570186.181016.249140@f14g2000cwb.googlegroups.com>
Message-ID: <1113609291.242433.293000@z14g2000cwz.googlegroups.com>

import socket
print socket.gethostbyname( socket.gethostname() )



From bogus@does.not.exist.com  Tue Apr  5 15:25:02 2005
From: bogus@does.not.exist.com ()
Date: Tue, 05 Apr 2005 19:25:02 -0000
Subject: (no subject)
Message-ID: <mailman.48.1572218145.3356.python-list@python.org>

#! rnews 1227
Newsgroups: comp.lang.python
Path: news.xs4all.nl!newsspool.news.xs4all.nl!transit.news.xs4all.nl!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!nntp.abs.net!attws2!ip.att.net!NetNews1!xyzzy!nntp
From: Harry George <harry.g.george at boeing.com>
Subject: Re: IronPython 0.7 released!
X-Nntp-Posting-Host: cola2.ca.boeing.com
Content-Type: text/plain; charset=us-ascii
Message-ID: <xqx8y3xhwny.fsf at cola2.ca.boeing.com>
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
Lines: 19
Sender: hgg9140 at cola2.ca.boeing.com
Organization: The Boeing Company
References: <1111603770.909447.18070 at z14g2000cwz.googlegroups.com> <acidnWJnCsYDPc_fRVn-1g at wideopenwest.com>
Mime-Version: 1.0
Date: Tue, 5 Apr 2005 19:05:05 GMT
Xref: news.xs4all.nl comp.lang.python:370993

Thomas Gagne <tgagne at wide-open-west.com> writes:

> Does the Python community think Microsoft's embrace is a good or bad thing?
> 
> James wrote:
> > http://www.gotdotnet.com/workspaces/workspace.aspx?id=ad7acff7-ab1e-4bcb-99c0-57ac5a3a9742
> >

"Please refer to uploaded documentation for full text of the Shared
Source License for IronPython" says it all.

Shared Source is an abomination, complete with the risk of
cross-contaminating true OSS projects.  I wouldn't voluntarily use the
thing and I certainly wouldn't look at the source code.

-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From johnmbradbury at tiscali.co.uk  Sun Apr  3 18:44:44 2005
From: johnmbradbury at tiscali.co.uk (John M Bradbury)
Date: Sun, 3 Apr 2005 23:44:44 +0100
Subject: GUI - Qt Designer
Message-ID: <000201c5389e$bb837530$a1542950@johns>

Hi I am John M Bradbury. A message for John Bradbury, I am wondering if we 
are related?
e-mail enquiries at johnmbradburyart.co.uk
www.johnmbradburyart.co.uk

Best wishes

John M Bradbury 




From steve.horsley at gmail.com  Wed Apr 27 17:00:08 2005
From: steve.horsley at gmail.com (Steve Horsley)
Date: Wed, 27 Apr 2005 22:00:08 +0100
Subject: Secure FTP
In-Reply-To: <mailman.2563.1114592871.1799.python-list@python.org>
References: <mailman.2563.1114592871.1799.python-list@python.org>
Message-ID: <d4oudf$qgs$1@news.freedom2surf.net>

Daniel Bowett wrote:
> I need to download files over a secure channel.
> 
> I have been looking into Paramiko which seems to have the functonality I 
> need. The problem is I need a FTP server which supports key based 
> encryption to install on my windows server.
> 
> Has anyone succeeded in doing this? If so - what FTP server did you use?
> 
> Dan.
> 

OpenSSH (www.openssh.com) supports SFTP which can use a shared 
key or certificates for its encryption. It includes both client 
and server programs.

HTH
Steve


From jguerin at cso.atmel.com  Fri Apr  1 13:54:18 2005
From: jguerin at cso.atmel.com (Justin Guerin)
Date: Fri, 01 Apr 2005 11:54:18 -0700
Subject: how to close a gzip.GzipFile?
Message-ID: <200504011154.18640.jguerin@cso.atmel.com>

Hello list,

gzip documentation states that calling the .close() method on a GzipFile 
doesn't really close it.  If I'm really through with it, what's the best 
way to close it?  I'm using Python2.2 (but the gzip module doesn't seem to 
be any different from 2.4).

Here's my code snippet, if it's relevant:

oldfileobj= file(oldfile, 'r')
oldmd5 = md5.new()
tellold = 0
tellnew = 1
while tellold != tellnew:
    line = oldfileobj.readline()
    tellold = tellnew
    tellnew = oldfileobj.tell()
    oldmd5.update(line)


At this point, I'm finished reading the file, and would like to properly 
close it.  Should I just del oldfileobj?

Also, while I'm asking, does anyone know a better way to iterate through a 
gzipped file?  The gzip module doesn't support iteration, nor xreadlines.  
I need to avoid reading the entire file contents into memory, so I can't 
use "for line in oldfileobj.readlines()"

Thanks for the pointers.

Justin Guerin


From mauriceling at acm.org  Thu Apr  7 17:54:49 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 08 Apr 2005 07:54:49 +1000
Subject: text processing problem
Message-ID: <d34a7f$gnd$1@domitilla.aioe.org>

Hi,

I'm looking for a way to do this: I need to scan a text (paragraph or 
so) and look for occurrences of "<text-x> (<text-x>)". That is, if the 
text just before the open bracket is the same as the text in the 
brackets, then I have to delete the brackets, with the text in it.

Does anyone knows any way to achieve this?

The closest I've seen is 
(http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305306) by 
Raymond Hettinger

 >>> s = 'People of [planet], take us to your leader.'
 >>> d = dict(planet='Earth')
 >>> print convert_template(s) % d
People of Earth, take us to your leader.

 >>> s = 'People of <planet>, take us to your leader.'
 >>> print convert_template(s, '<', '>') % d
People of Earth, take us to your leader.

"""

import re

def convert_template(template, opener='[', closer=']'):
     opener = re.escape(opener)
     closer = re.escape(closer)
     pattern = re.compile(opener + '([_A-Za-z][_A-Za-z0-9]*)' + closer)
     return re.sub(pattern, r'%(\1)s', template.replace('%','%%'))

Cheers
Maurice


From rkern at ucsd.edu  Sun Apr 24 11:34:48 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 24 Apr 2005 08:34:48 -0700
Subject: Is this a bug?
In-Reply-To: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
Message-ID: <d4ge1f$n13$1@sea.gmane.org>

Michael Sparks wrote:
> Hi,
> 
> 
> I've hit a corner case that I can explain to myself *why* it happens, both
> under python 2.3 and python 2.4, but the following inconsistency makes me
> wonder if I should log it as a bug:
> 
> First the behaviour that isn't unexpected:
> 
> 
>>>>a=["hello"]
>>>>a = a + "world"
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: can only concatenate list (not "str") to list
> 
> 
> Which is pretty what I'd expect.
> 
> However if we do this just slightly differently:
> 
> 
>>>>a = ["hello"]
>>>>a += "world"
>>>>a
> 
> ['hello', 'w', 'o', 'r', 'l', 'd']
> 
> We get completely different behaviour. This strikes me as a bug - should I
> log it as one, or is there a good reason for this behaviour?

It's consistent with using a.extend("world") which is what the += is 
sugar for.

In [1]:a = ['hello']

In [2]:a.extend("world")

In [3]:a
Out[3]:['hello', 'w', 'o', 'r', 'l', 'd']

It's a *good* thing that .extend() takes any iterable without explicit 
conversion to a list. I think that it's just a minor annoyance that the 
behavior passes on to +=.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From fredrik at pythonware.com  Fri Apr  8 13:03:25 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 19:03:25 +0200
Subject: Testing that a value is set.
References: <1112975027.643792.71790@g14g2000cwa.googlegroups.com>
Message-ID: <d36dc9$nj9$1@sea.gmane.org>

erinhouston at gmail.com wrote:

>I am using winGuiAuto to test a program.  I want to check that a
> varible is set.
>
> In the following code I am doing if(len(str(hwnd)) < 0) What is the
> python way?

you're expecting a string with negative length?  that's pretty weird.  what language
uses that mechanism to report errors?

> def clickNdSyncStopButton(hwnd=None):
> ....if(hwnd == None):
> ........hwnd = winGuiAuto.findTopWindow("NDSync")

that's usually written:

    if hwnd is None:
        ...

> ....if(len(str(hwnd)) < 0):
> ........raise "Failed to find the NDSync Dialog"

according to the winGuiAuto documentation, the findTopWindow function raises
an exception if it cannot find a window; maybe you should just ignore that, and let
the user code deal with that exception instead of your uncatchable string literals...

(rereading the chapter on exceptions in your favourite Python tutorial cannot hurt)

</F> 





From sidharth.kuruvila at gmail.com  Fri Apr  8 18:23:31 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Sat, 9 Apr 2005 03:53:31 +0530
Subject: Declaring variables from a list
In-Reply-To: <20050408220706.GG7999@siliconimage.com>
References: <1163d88e.0504081255.438fbb96@posting.google.com>
	<2ab2ed5505040814454b087df1@mail.gmail.com>
	<20050408220706.GG7999@siliconimage.com>
Message-ID: <2ab2ed55050408152361459e9c@mail.gmail.com>

What I gave was a bad solution. Something that works right now, but
probably shouldn't be done.

On Apr 9, 2005 3:37 AM, Inyeol Lee <inyeol.lee at siimage.com> wrote:
> On Sat, Apr 09, 2005 at 03:15:01AM +0530, Sidharth Kuruvila wrote:
> > Python has a builtin function called locals which returns the local
> > context as a dictionary
> >
> > >>> locals = locals()
> > >>> locals["a"] = 5
> > >>> a
> > 5
> > >>> locals["a"] = "changed"
> > >>> a
> > 'changed'
> 
> >From Python lib reference:
> 
> """
> locals()
>     ...
>     Warning: The contents of this dictionary should not be
>     modified; changes may not affect the values of local variables used
>     by the interpreter.
> """
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From jepler at unpythonic.net  Thu Apr  7 16:24:38 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 7 Apr 2005 15:24:38 -0500
Subject: curious problem with large numbers
In-Reply-To: <723eb693050407124816431b6a@mail.gmail.com>
References: <723eb693050407124816431b6a@mail.gmail.com>
Message-ID: <20050407202437.GJ12835@unpythonic.net>

You may want to read
http://www.python.org/peps/pep-0754.html

Part of the text reads
    The IEEE 754 standard defines a set of binary representations and
    algorithmic rules for floating point arithmetic. Included in the
    standard is a set of constants for representing special values,
    including positive infinity, negative infinity, and indeterminate or
    non-numeric results (NaN). Most modern CPUs implement the IEEE 754
    standard, including the (Ultra)SPARC, PowerPC, and x86 processor
    series.

    Currently, the handling of IEEE 754 special values in Python depends
    on the underlying C library. Unfortunately, there is little
    consistency between C libraries in how or whether these values are
    handled. For instance, on some systems "float('Inf')" will properly
    return the IEEE 754 constant for positive infinity. On many systems,
    however, this expression will instead generate an error message.

Jeff
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From onurb at xiludom.gro  Thu Apr 28 04:40:26 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Thu, 28 Apr 2005 10:40:26 +0200
Subject: Which IDE is recommended?
In-Reply-To: <slrnd70bt5.d0e.davecook@localhost.localdomain>
References: <426f90ac$1_2@rain.i-cable.com>
	<slrnd70bt5.d0e.davecook@localhost.localdomain>
Message-ID: <4270a17c$0$30585$626a14ce@news.free.fr>

Dave Cook wrote:
(snip)
> Once upon a time emacs was considered bloated,

That was when "640ko ought to be enough" ?-)

> but it's tiny compared to eclipse.
Yeps. And a *lot* faster. And in not that much bigger than Vim in fact...

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


From mahs at telcopartners.com  Mon Apr 18 19:13:22 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 18 Apr 2005 16:13:22 -0700
Subject: Enumerating formatting strings
In-Reply-To: <d414ps$kd4$1@sea.gmane.org>
References: <d414ps$kd4$1@sea.gmane.org>
Message-ID: <d41elv$kgp$1@sea.gmane.org>

Steve Holden wrote:

> I've been wondering whether it's possible to perform a similar analysis 
> on non-mapping-type format strings, so as to know how long a tuple to 
> provide, or whether I'd be forced to lexical analysis of the form string.
> 
> regards
>  Steve
I do not know if it is possible to do that.

But if you are forced to parse the string, the following might help:

import re
parse_format = re.compile(r'''
     \%                                  # placeholder
     (?P<name>\([\w]+\))?                # 0 or 1 named groups
     (?P<conversion>[\#0\-\+]?)          # 0 or 1 conversion flags
     (?P<width>[\d]* | \*)               # optional minimum conversion width
     (?:.(?P<precision>[\d]+ | \*))?     # optional precision
     (?P<lengthmodifier>[hlL]?)          # optional length modifier
     (?P<type>[diouxXeEfFgGcrs]{1})      # conversion type - note %% omitted
     ''',
     re.VERBOSE
     )


  >>> parse_format.findall("%(name)s, %-4.2f, %d, %%")
  [('(name)', '', '', '', '', 's'), ('', '-', '4', '2', '', 'f'), ('', '', '', 
'', '', 'd')]
  >>>

I used this successfully in a few simple cases, but I haven't really tested it.

cheers
Michael



From nvasiliev at whiteriversoft.com  Wed Apr  6 03:13:59 2005
From: nvasiliev at whiteriversoft.com (Nicolay A. Vasiliev)
Date: Wed, 06 Apr 2005 11:13:59 +0400
Subject: Best editor?
In-Reply-To: <SqJ4e.771$r6.203@news.itd.umich.edu>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>	<d2v4b7$pb4$1@panix1.panix.com>
	<SqJ4e.771$r6.203@news.itd.umich.edu>
Message-ID: <42538C37.1020100@whiteriversoft.com>

Hello!

What do you think all about ActiveState Komodo?

Michael George Lerner wrote:

>Aahz <aahz at pythoncraft.com> wrote:
>
>  
>
>>Use vim.  80% of the power of emacs at 20% of the learning curve.
>>    
>>
>
>A system administrator said this to me about unix a long time ago,
>but it applies equally well to emacs:
>
>Emacs is a great place to live, but I'd hate to visit.
>
>-michael, an (x)emacs user
>
>  
>




From joerg.schuster at gmail.com  Wed Apr 27 11:43:02 2005
From: joerg.schuster at gmail.com (Joerg Schuster)
Date: 27 Apr 2005 08:43:02 -0700
Subject: compile shebang into pyc file
In-Reply-To: <mailman.2582.1114615536.1799.python-list@python.org>
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
	<fb66056705042707372695904d@mail.gmail.com>
	<mailman.2582.1114615536.1799.python-list@python.org>
Message-ID: <1114616582.677507.252650@z14g2000cwz.googlegroups.com>

> #!/usr/bin/env python
> import app

Yes, of course this is a possibility. But it implies having (or giving
away) two files.

I think having one file is always better than having two files. Because
if you have two files, you need a third one: a README that tells you
what to do with the two files and that one of the files must either be
in $PYTHONPATH, or in the same directory as the other one and '.' must
be in your $PYTHONPATH , and so on. Actually, some people will also
need a fourth file: One that contains an explanation of terms like
"$PYTHONPATH" and the like. 

J?rg



From mahs at telcopartners.com  Fri Apr 22 17:54:32 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 22 Apr 2005 14:54:32 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
Message-ID: <d4brh0$11h$1@sea.gmane.org>

mehmetmutigozel at gmail.com wrote:
> I was thinking about something like the following;
> 
> 
>>>>a=[ t**n for n in range(4) ]
> 
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> NameError: name 't' is not defined
> 
> 
> or
> 
> 
>>>>a=[ lambda t: t**n for n in range(4) ]
>>>>t=2
>>>>a

Perhaps you mean:
  >>> a = lambda t: [t**n for n in range(4)]
  >>> a(2)
  [1, 2, 4, 8]
  >>>

but that is better written as:
  >>> def a(t):
  ...     return [t**n for n in range(4)]
  ...
  >>>
  >>> a(2)
  [1, 2, 4, 8]
  >>>

Michael






From ivanlan at pauahtun.org  Sat Apr  2 15:10:37 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Sat, 02 Apr 2005 13:10:37 -0700
Subject: Pseudocode in the wikipedia
References: <mailman.1210.1112394097.1799.python-list@python.org>
	<ip53i2-7qm.ln1@lairds.us>
Message-ID: <424EFC3D.7EE0F55F@pauahtun.org>

Hi All--

Cameron Laird wrote:
> 
> Welcome back, Ivan.  Your follow-ups make one wonder about the
> span of related topics clp has been missing in your absence.
>

Thanks for the welcome.  Absence was more a consequence of working for
idiots for four years (at 60-80 hours/week) than anything else.  Now
that I'm not working I've got time to catch up on what's new in Python. 
Nice to see a few familiar faces, too.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From bearophileHUGS at lycos.com  Thu Apr 21 15:19:15 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Apr 2005 12:19:15 -0700
Subject: recording data between [ and ]
In-Reply-To: <d48fc1$2rm$00$1@news.t-online.com>
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<d48fc1$2rm$00$1@news.t-online.com>
Message-ID: <1114111155.408043.291950@o13g2000cwo.googlegroups.com>

Diez B. Roggisch>But as the world is complex and people want solutions
to their complex problems, IMHO programming will always be about such
nitty gritty details.<

REs are like assembly, but high-level languages show us that for a
mammal there are (often) better (higher) ways to program a computer.
The computer can also compile the high-level language, to run it quite
quickly.

Beside rxb15, there is also redict, in the standard lib (Jay Graves
shows the HD path):
http://home.earthlink.net/~jasonrandharper/reverb.py

Maybe a higher level language (this is just a wrapper) like this can
become the standard way to make REs in Python.

Bearophile



From listspam at flowtheory.net  Fri Apr  8 17:46:05 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Fri, 8 Apr 2005 15:46:05 -0600
Subject: Exception Handling
Message-ID: <9d8391ce0d81f6a9b8fc18fd81402f63@flowtheory.net>

If you use "except:" without any specific error class, it will be a 
catchall for any error class (including Warning and its derivatives). 
Otherwise you can use inheritance to refer to a group of exceptions 
(e.g. "except Exception:" would catch ValueError, since the ValueError 
class inherits from the generic Exception class).

-jag

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 8, 2005, at 3:29 PM, SuperJared wrote:

> I'm new to Python, well versed in PHP and a bit of Perl.
>
> I've written a simple backup utility that FTPs from one server to
> another. I'd like to implement exception handling on the FTP should
> someting go wrong.
>
> This is basically what I have so far:
>
>
> try:
>    ftp = FTP(ftp_host, ftp_user, ftp_pass)
>    ftp.storbinary('STOR ' + filename, pointer)
>    ftp.close()
> except:
>    # do something with an error message here...?
>
>
> I'd like to use 'all_errors' but I don't know how! Will I have to
> create a handler for each other exception?
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>


From superprad at gmail.com  Sat Apr 23 15:50:50 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 23 Apr 2005 12:50:50 -0700
Subject: Handling lists
Message-ID: <1114285850.091749.188680@f14g2000cwb.googlegroups.com>

I have a question on python lists.
Suppose I have a 2D list
list = [[10,11,12,13,14,78,79,80,81,300,301,308]]
how do I convert it so that I arrange them into bins  .
so If i hvae a set of consecutive numbers i would like to represent
them as a range in the list with max and min val of the range alone.
I shd get something like 
list = [[10,14],[78,81],[300,308]]



From sjuranic at gmail.com  Tue Apr 19 10:21:13 2005
From: sjuranic at gmail.com (Steve Juranich)
Date: Tue, 19 Apr 2005 07:21:13 -0700
Subject: Extending base class methods
In-Reply-To: <1113919270.802463.54310@l41g2000cwc.googlegroups.com>
References: <1113919270.802463.54310@l41g2000cwc.googlegroups.com>
Message-ID: <56190b6c05041907212976b8e3@mail.gmail.com>

On 19 Apr 2005 07:01:10 -0700, henrikpierrou at hotmail.com
<henrikpierrou at hotmail.com> wrote:
> Any ideas why this does not work? I get the error "TypeError: unbound
> method printer() must be called with Field_Collection instance as first
> argument (got MSD instance instead)"):

My suggestion would be to make Field_Collection inheirit from
"object".  Then you can make use of the "super" call inside of MSD. 
It would look something like this:

class Field_Collection(object):
    # Some stuff.

class MSD(Field_Collection):
    # More stuff
    def printer(self):
        print "Standard: " + self.standard
        print "decField: " + self.decField
        super(MSD, self).printer()


HTH

-- 
Steve Juranich
Tucson, AZ
USA


From jstroud at mbi.ucla.edu  Thu Apr 21 16:25:36 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 21 Apr 2005 13:25:36 -0700
Subject: New line
In-Reply-To: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
References: <42680a8a_1@mk-nntp-2.news.uk.tiscali.com>
Message-ID: <200504211325.36499.jstroud@mbi.ucla.edu>

In the absence of any context to this question: Hit the button that says 
"Enter".

James

On Thursday 21 April 2005 01:15 pm, ionic wrote:
> Hi all
>
> This is probably going to sound very dull but, how do you get to the next
> line after youve finished typing the first line?
>
> Thanks in advance
>
> --
>
> "It's all in fun or life isn't worth it!"

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

http://www.jamesstroud.com/


From Pokerface.1na1cc at no-mx.tacticalgamer.com  Sun Apr 10 10:11:23 2005
From: Pokerface.1na1cc at no-mx.tacticalgamer.com (Pokerface)
Date: Sun, 10 Apr 2005 10:11:23 -0400
Subject: UselessPython 2.0
Message-ID: <Pokerface.1na1cc@no-mx.tacticalgamer.com>


Dear Pythonistas,

USELESSPYTHON (www.uselesspython.com) has finally come of age.

After almost two years of hemming and hawing, we've finally put our
nose to the grindstone and cranked out version 2.0 of everyone's
favorite snippet site.  Our next trick: fill it.  That's where everyone
here comes in.

For those who do not know, UselessPython was originally born from the
Tutor mailing list.  We're starting things over, and we have a
practically empty site that we'd like to have swell to epic
proportions.  So we're requesting that anyone with one-offs, snippets,
mini-apps, full-fledged apps and the like make a submission to the new
and improved UselessPython.  The code doesn't have to be pretty, but it
does have to work.

We're also looking for ideas for new Python Challenges: ideas for
things that will rouse the creative spirit in visitors.  After all,
without a problem to solve, programming is just a bunch of goofy words
and indentations.

So please, do this list and Python in general a favor and visit (and
support through your code) the new and (hopefully) improved
UselessPython.

Thank you for your time.
Sean
http://www.uselesspython.com


-- 
Pokerface:: Posted from Tactical Gamer - http://www.TacticalGamer.com ::



From rpmuller at gmail.com  Sun Apr  3 18:25:38 2005
From: rpmuller at gmail.com (RickMuller)
Date: 3 Apr 2005 15:25:38 -0700
Subject: Question about the Python Cookbook: How much of this is new?
Message-ID: <1112567138.365571.129840@l41g2000cwc.googlegroups.com>

I had a question about the second edition of the Python Cookbook. I own
and have thoroughly enjoyed the first edition of the Python Cookbook.
How much of the second edition is new? Is this "essential reading" if I
already have the first edition? I realize that there are new sections
that describe language features through Python 2.4, but is this, say,
10% of the book (in which case I won't buy a new copy) or is it >25% of
the book (in which case I will). The Chapter (#3) on Time/Money that's
posted on the O'Reilly website is great (and entirely new, if memory
serves).

Thanks in advance...

Rick



From jstroud at mbi.ucla.edu  Tue Apr 26 22:34:13 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 26 Apr 2005 19:34:13 -0700
Subject: How remove directories with the content in the platform
	independent way?
In-Reply-To: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>
References: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>
Message-ID: <200504261934.13666.jstroud@mbi.ucla.edu>

Look at the os and os.path modules.

http://docs.python.org/lib/module-os.html
http://docs.python.org/lib/module-os.path.html



On Tuesday 26 April 2005 07:27 pm, so sayeth Andy Leszczynski:
> How remove directories with the content in the platform independent way?
> Is the API for that?
>
> Thx, A.

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

http://www.jamesstroud.com/


From msoulier at gmail.com  Thu Apr 21 10:03:38 2005
From: msoulier at gmail.com (Michael Soulier)
Date: Thu, 21 Apr 2005 10:03:38 -0400
Subject: goto statement
In-Reply-To: <d45kna$f1o$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
Message-ID: <fb6605670504210703cb52e7e@mail.gmail.com>

On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
> 
> but what if i just can't to do this becouse i'm working thrue ssh, and have to use 
> only installed editors (such as vi)

Then learn to use vi. 

:.,+10s/^/#
" comment the next 10 lines

Mike

-- 
Michael P. Soulier <msoulier at gmail.com>
http://www.digitaltorque.ca
http://opag.ca      python -c 'import this'
Jabber: msoulier at digitaltorque.ca


From greg.lindstrom at novasyshealth.com  Thu Apr 14 08:15:45 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: 14 Apr 2005 05:15:45 -0700
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
Message-ID: <1113480945.345984.311040@o13g2000cwo.googlegroups.com>

> He says,
> Do you know how I can get "base12 pi"?
> Because the chromatic scale is base12.
> c c# d d# e f f# g g# a a# b
>
> Dick

It might feel more "natural" to do this with 'e' (2.718...)
--greg



From theller at python.net  Sat Apr 16 14:30:20 2005
From: theller at python.net (Thomas Heller)
Date: Sat, 16 Apr 2005 20:30:20 +0200
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net> <du71x9ho29x.fsf@mozart.cc.tut.fi>
	<3c1qrjF6k3k4fU1@individual.net>
	<mailman.1771.1113322382.1799.python-list@python.org>
	<426058a6_1@news.unc.edu>
Message-ID: <8y3i4ls3.fsf@python.net>

"Gary Bishop" <gb at cs.unc.edu> writes:

> Fernando Perez <fperez.net at gmail.com> wrote:
>> Claudio Grondi wrote:
>
>> > Considering what I found in the ipython mailing archives
>> > and the fact, that after the fix with displaying colors on
>> > bright backgrounds Gary had no time yet to get in touch
>> > with me about the code I have sent him, I suppose, that
>> > there will be no new releases addressing this problem
>> > soon, right?
>
> Folks, the code is OPEN SOURCE! It is right there at
> SourceForge. Anyone, anywhere, at any time is free to hack it,
> redistribute it, or ignore it.
>
> It works FINE FOR ME as it is. Furthermore, I know NOTHING about
> localization. Someone who NEEDS LOCALIZATION should FIX IT in a
> general way.
>
> Make your own version. Create a SourceForge project for it and you can
> be the developer. I wouldn't even care if you removed my name from it.
>
> I've received a patch or two for specific keyboards but I have no way
> to test them and no time or inclination to fool with it.
>
> The bottom line is, I write code for my own use. If others benefit
> that is great. If it doesn't do what you want, make your own
> version. If you want to distribute a new version, go for it.

Maybe it would make sense then to maintain the readline code in the ctypes
CVS repository, since it requires ctypes anyway?

Thomas


From m_tach at yahoo.com  Tue Apr 12 20:35:28 2005
From: m_tach at yahoo.com (m_tach at yahoo.com)
Date: Wed, 13 Apr 2005 02:35:28 +0200
Subject: problem with the logic of read files.. Thanks to all for your
	help
Message-ID: <14941$425c6950$43461874$4002@nf1.news-service.com>

Everything is fine now, thanks to all for your time




From greg.lindstrom at novasyshealth.com  Fri Apr  1 09:44:14 2005
From: greg.lindstrom at novasyshealth.com (Greg Lindstrom)
Date: Fri, 01 Apr 2005 08:44:14 -0600
Subject: Unzipping Files
Message-ID: <424D5E3E.3040506@novasyshealth.com>

Hello-
I am trying to read a file from a zip archive.  I have read the 
documentation on zipfile and can read the names of the files in the 
archive and the length of each file, but do not see how to get to the 
actual data from any given file.  This is probably so simple that it 
hurts, so take it easy on me if you please...I just don't see it and 
have a deadline rushing towards me.  How do I read the data from a file 
in a zip archive?

Thanks!
--greg

-- 
Greg Lindstrom               501 975.4859 (office)
Senior Programmer            501 219-4455 (fax)
NovaSys Health               greg.lindstrom at novasyshealth.com
Little Rock, Arkansas

"We are the music makers, and we are the dreamers of dreams."  W.W.




From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 24 12:18:01 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 24 Apr 2005 18:18:01 +0200
Subject: Question on metaclasses
In-Reply-To: <d4ge64$7pa$02$1@news.t-online.com>
References: <1114341959.796996.120840@l41g2000cwc.googlegroups.com>
	<d4g9v1$oi8$05$1@news.t-online.com>
	<d4gajc$oi8$05$2@news.t-online.com>
	<3d1ovcF6ni178U2@individual.net>
	<d4ge64$7pa$02$1@news.t-online.com>
Message-ID: <3d1v9gF6rkgapU1@individual.net>

Diez B. Roggisch wrote:
> Reinhold Birkenfeld wrote:
> 
>> Diez B. Roggisch wrote:
>>>> class Foo(type):
>>>>     def __new__(cls, name, bases, dict):
>>>> 
>>>>         for k,v in [(k, v) for k,v in dict.items() if callable(v)]:
>>>>             cls.wrap(k,v,cls.get_directives(v), dict)
>>>> 
>>>>         return super(Foo, self).__new__(self, name, bases, dict)
>>> 
>>> There is a confusion of self and cls above - rename self with cls.
>> 
>> And remove the first argument to __new__.
> 
> Ehm, no, I don't think so. The code was copied and pasted from a working
> metaclass (at least I hope so...), and in the original code a underscore
> was used for the first argument. I've been following that bad habit for a
> while but recently started to be more following to the established
> conventions. So I rewrote that code on the fly. 

Oh yes. I forgot that __new__ is a staticmethod anyhow.

Reinhold


From t-meyer at ihug.co.nz  Wed Apr 13 19:34:18 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Thu, 14 Apr 2005 11:34:18 +1200
Subject: os.path.walk
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E80297BC20@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB0095@its-xchg4.massey.ac.nz>

> I think if you try this you will find that it doesn't work because 
> os.path.walk will try to call the *result* of processDirectory(a,b,c) 
> for each directory in the path.

Opps.  I missed the "path", so gave an answer for os.walk.  Apologies.

The actual answer, then, I guess is that the OP can do this:

os.path.walk(name, processDirectory, (a,b,c))

And define processDirectory something like:

def processDirectory(args, dirname, fnames):
   a,b,c = args
   ...

=Tony.Meyer



From WLigtenberg at gmail.com  Sat Apr 16 09:24:51 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Sat, 16 Apr 2005 15:24:51 +0200
Subject: XML parsing per record
Message-ID: <pan.2005.04.16.13.24.51.477214@gmail.com>

I want to parse a very large (2.4 gig) XML file (bioinformatics ofcourse :))
But I have no clue how to do that. Most things I see read the entire xml
file at once. That isn't going to work here ofcourse.

So I would like to parse a XML file one record at a time and then be able
to store the information in another object.
How should I do that?

Thanks in advance,

Willem Ligtenberg
A total newbie to python by the way.


From apardon at forel.vub.ac.be  Thu Apr 21 02:44:47 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 06:44:47 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
	<slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>
	<d45pj0$s4m$1@panix2.panix.com>
Message-ID: <slrnd6eiuv.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Roy Smith schreef <roy at panix.com>:
> Antoon Pardon  <apardon at forel.vub.ac.be> wrote:
>>Op 2005-04-20, Roy Smith schreef <roy at panix.com>:
>>> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>>>
>>>> Personnaly I would like to have the choice. Sometimes I prefer to
>>>> start at 0, sometimes at 1 and other times at -13 or +7.
>>>
>>> Argggh.  Having two (or more!) ways to do it, would mean that every time I 
>>> read somebody else's code, I would have to figure out which flavor they are 
>>> using before I could understand what their code meant.  That would be evil.
>>
>>This is nonsens. table[i] = j, just associates value j with key i.
>>That is the same independend from whether the keys can start from
>>0 or some other value. Do you also consider it more ways because
>>the keys can end in different values?
>
> There are certainly many examples where the specific value of the
> first key makes no difference.  A good example would be
>
>     for element in myList:
>         print element
>
> On the other hand, what output does
>
>    myList = ["spam", "eggs", "bacon"]
>    print myList[1]
>
> produce?  In a language where some lists start with 0 and some start
> with 1, I don't have enough information just by looking at the above
> code.

Yes you have. The fact that a language allows a choice doesn't
contradict there is a default, when no choice is specified.

My preference would be that it would produce "spam", because
if you want the *first*" element, you want the element
associated withe the key 1.

Or maybe the language would force you to give a start index,
so that you would have to write:

  MyList = [3 -> "spam", "eggs", "bacon"]

End of course the language would provide instances or methods
so you could ask what the first index was.

-- 
Antoon Pardon


From programmer.py at gmail.com  Thu Apr 28 08:45:37 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Thu, 28 Apr 2005 07:45:37 -0500
Subject: dynamically generating temporary files through python/cgi
In-Reply-To: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
References: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
Message-ID: <d52c72d2050428054567cad00f@mail.gmail.com>

On 27 Apr 2005 23:32:15 -0700, poisondart <poisondart985 at gmail.com> wrote:
> Is there a way to dynamically generate temporary files (such as an
> html, xml or text file) in Python?
> 
> I'm not sure if I'm explaining myself clearly as I've no clue how to
> describe this mechanism. I've seen it on certain websites that will
> generate a file under certain parameters (through forms) that will
> dissapear (i.e. delete itself) after a specified amount of time. These
> files usually have some phony string for their filenames...like it's
> been md5 hashed or something.
> 
> Is there a group of library functions that allow this? I imagine that
> if i manually go and allocate a bunch of timers to monitor files, it
> would be really expensive in load. Or perhaps is this a client-side
> mechanism?

I think the best way to do that is have a web page that generates the
files with random filenames.  These files probably ought to reside in
their own special directory.  This web page gives the user a link to
the filename.

Next, have a cron job kick off every 5 minutes or so that deletes any
files that are older than 'X' minutes.  This seems to be the simplest
approach.

jw


From joeyjwc at gmail.com  Mon Apr  4 19:39:27 2005
From: joeyjwc at gmail.com (joeyjwc at gmail.com)
Date: 4 Apr 2005 16:39:27 -0700
Subject: Super Newbie Question
Message-ID: <1112657967.156094.75040@f14g2000cwb.googlegroups.com>

I have recently started to use Python to develop a new version of my
website.

I'm working on a sort of "web engine" that takes the contents of a
standardized file format I have designed and then outputs it using
templates created by me.

However, I'm only at the very beginning (i.e. opening and reading
files) because I'm a newbie to Python.  I want to spend a lot of time
learning Python.

I have searched with about 15 million different key phrases on Google
and Google Groups but haven't come up with an answer to my following
question:

I want the "engine" to read the file, write its contents to another
temporary file (for now it just writes the contents; later it will
format it before writing the contents) and then deletes the *contents*
of the temporary file after printing out the result, but not the
temporary file itself.  I want it to do this because that temporary
file will be reused to write to for other pages as well.

In short, how might I go about deleting just the contents of a file?
I tried several methods with my limited knowledge but had no luck.

Thank you very much for answering a lowly newbie's question.  I really
appreciate it.

P.S.  If there's a better that you think to perform what I am saying,
I'd like to be enlightened.  But I'd also like my question answered
too, in case I ever need to do something similar again.



From stewart.midwinter at gmail.com  Wed Apr  6 23:58:28 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 6 Apr 2005 20:58:28 -0700
Subject: Web application toolkit recommendation?
In-Reply-To: <1112780472.948835.232070@f14g2000cwb.googlegroups.com>
References: <mailman.1333.1112659316.1799.python-list@python.org>
	<1112780472.948835.232070@f14g2000cwb.googlegroups.com>
Message-ID: <1112846308.216502.287610@o13g2000cwo.googlegroups.com>

I have looked briefly at Karrigell. does it support user logins?

S



From kretino at net.hr  Wed Apr 20 06:16:51 2005
From: kretino at net.hr (jozo)
Date: 20 Apr 2005 03:16:51 -0700
Subject: Lex
Message-ID: <bf594e7.0504200216.303729d0@posting.google.com>

I have to work on python lexical definition in Lex. I spent lots of my
time to find regular expresions written for Lex of Python language but
nothing.
Can somebody help me?


From ariane at freenet.de  Thu Apr 21 11:14:31 2005
From: ariane at freenet.de (Ariane)
Date: Thu, 21 Apr 2005 17:14:31 +0200
Subject: Meine geilen Bilder
Message-ID: <4267c26e$1$17971$6d4158fb@reader-1.xsnews.nl>

Hi, hier sind meine geilen Bilder!
My nude Pics!!!
http://www.geile-tipps.info/go/ 

--
Posted by News Bulk Poster
Unregistered version


From ojokimu at yahoo.co.uk  Mon Apr  4 19:34:41 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Tue, 5 Apr 2005 00:34:41 +0100 (BST)
Subject: Eric3 under WinXP
Message-ID: <20050404233441.52665.qmail@web26806.mail.ukl.yahoo.com>


* Franz Steinh?usler wrote:

> I have successfully installed pyqt, but not
> qtext, which I need to run Eric3.
> The PyQT demo files run fine.
> 
> I've downloaded QScintilla, compiled via MS-VC,
> but (I suppose I need the SIG), to translate or provide
> the Python interface with pyd Files.
> 
> Eric complains, that qtext is not found.
> 
> Has anyone success with getting this to work and how?

Hi Franz.

If you don't get any help here, please try the mailing list at:

http://mats.imk.fraunhofer.de/mailman/listinfo/pykde


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From ruach at chpc.utah.edu  Fri Apr  8 12:02:56 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 10:02:56 -0600
Subject: Can dictionary values access their keys?
In-Reply-To: <d369dj$9vs$04$1@news.t-online.com>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
	<d369dj$9vs$04$1@news.t-online.com>
Message-ID: <d369vh$rpb$1@vegh.ks.cc.utah.edu>

Can you please elaborate on this?
-Matthew

Diez B. Roggisch wrote:
>>keeping a additional mapping between values and keys.
> 


From tjreedy at udel.edu  Thu Apr  7 15:50:29 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 7 Apr 2005 15:50:29 -0400
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu><mailman.1222.1112417820.1799.python-list@python.org><d2vhi8$k29$1@panix1.panix.com><mailman.1429.1112794393.1799.python-list@python.org>
	<d33ij3$9jj$1@panix2.panix.com>
Message-ID: <d342pp$2vt$1@sea.gmane.org>


"Aahz" <aahz at pythoncraft.com>

> Pinard  <pinard at iro.umontreal.ca> wrote:
>>Sure, of course.  Yet, our friendly argument is sliding away from was it
>>originally was.  The point was about not asserting in this forum that
>>Python "has only one way to do it", because this is not true anymore.
>>
>>The principle has been, it may be back in some distant future, but now
>>it is not.
>
> You're conflating two different things:
>
> * Whether Python currently has only one way to do things
>
> * Whether Python has a design goal of only one way to do things
>
> I'll agree that Python currently has many examples of more than one way
> to do things (and even Python 3.0 won't remove every example, because
> anything more complicated than a Turing Machine has more than one way to
> do things).  But I won't agree that Only One Way has been abandoned as a
> design principle.

The statement in the  Zen of Python is "There should be one-- and 
preferably only one --obvious way to do it."  The splits into two related 
statements:
There should be [at least] one obvious way to do it.
There should preferably be only one obvious way to do it.

Commentary:

While 'should' can mean 'must', it can also mean something something 
softer, like desireability and preference.  In Pythonese, it has (as far as 
I know) such  softer meanings, with 'must' used when 'must is meant.  In 
the second sentence, preference is made explicit.

The presence of 'obvious' is obviously not accidental.  Without it, and 
with 'should' replaced with 'must', we eventually end up with any of 
numerous simple, possibly interesting, and mostly practically useless 
Turing-equivalent systems.  The qualifier 'obvious' does not exclude 
non-obvious ways.  For example, the obvious way, in Python, to add 1 and 2 
to get 3 is '1+2'.  Two non-obvious (certainly for the beginner) ways are 
'1 .__add__(2)' [space required] and 'import operator; operator.add(1,2)'.

Unfortunately, 'obvious' too often get elided in the discussion of this 
principle.  For some, its because it is so obviously needed that it seems 
to not need to be said.  For others, it appears to be because they are not 
fully cognizant of it.  The result can be people talking past each other. 
And, of course, obviousness is somewhat in the mind of the beholder.

The first sentence provides impetus to add new features that 'should be' 
present but are not.  At this point, that mostly means new library modules.

The second principle inhibits (but not absolutely prevents) adding 
'obvious' redundancy.  When exceptions are made, the principle of not 
breaking code prevents deleting the old except after a while and very 
occasionally.  The inhibitory principle does encourage attempts to relegate 
the old to a less obvious status by treatments in the tutorial and manuals.

The inhibitory principle is certainly still alive.  Function decorators 
barely made it past.  The proposal to extend them to classes has so far 
been rejected by GvR since class decorators seem redundant with 
metaclasses.  And lots else has been ignored or rejected.

Terry J. Reedy





From simon.brunning at gmail.com  Thu Apr 14 04:49:51 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Thu, 14 Apr 2005 09:49:51 +0100
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 11)
In-Reply-To: <3c670tF6jdeqrU1@individual.net>
References: <d3ekhf$a0f$1@lairds.us> <3c670tF6jdeqrU1@individual.net>
Message-ID: <8c7f10c605041401491b7dd900@mail.gmail.com>

On 4/14/05, Greg Ewing <greg at cosc.canterbury.ac.nz> wrote:
> Actually it was me who wrote that, not Scott.
> 
> (Darn. I finally say something that gets into Quote of the
> Week, and it's attributed to someone else! :-) :-) :-)

Ooops. I'm really very sorry about that.

Try and think of something else witty to say over the next day or two
- I'm sure I can squeeze you into next week's. ;-)

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From amichail at gmail.com  Sat Apr  9 04:21:37 2005
From: amichail at gmail.com (Amir  Michail)
Date: 9 Apr 2005 01:21:37 -0700
Subject: ideal rankings for python related search engine queries
Message-ID: <1113034897.875349.146300@o13g2000cwo.googlegroups.com>

Hi,

Google is good, but not perfect.

CollaborativeRank takes Google rankings as a starting point but allows
users to tweak them in a collaborative way to achieve something even
better.

Perhaps some people in this group might be interested in producing even
better rankings for python related queries?

http://www.cse.unsw.edu.au/~amichail/collabrank
http://www.cse.unsw.edu.au/~amichail/collabrank/collabrank.pdf

The system uses a hubs and authorities style analysis to encourage
timely and helpful ranking suggestions.  See the paper for details.

Amir



From mweihs at gmx.at  Fri Apr 22 16:52:56 2005
From: mweihs at gmx.at (Markus Weihs)
Date: Fri, 22 Apr 2005 22:52:56 +0200
Subject: How to prevent Tkinter frame resize?
References: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
Message-ID: <pan.2005.04.22.20.52.55.728236@gmx.at>

Hi!

I think what you want is maxsize():


from Tkinter import *

root = Tk()
root.maxsize(100,100)
root.mainloop()


Regards, Mark



From uche.ogbuji at gmail.com  Sat Apr 23 16:54:55 2005
From: uche.ogbuji at gmail.com (Uche Ogbuji)
Date: Sat, 23 Apr 2005 14:54:55 -0600
Subject: XML file parsing with SAX
In-Reply-To: <cbb068b30504231328d7174d2@mail.gmail.com>
References: <pan.2005.04.23.13.19.59.910355@gmail.com>
	<1114285730.7121.92.camel@borgia>
	<cbb068b30504231328d7174d2@mail.gmail.com>
Message-ID: <57ac7f9e0504231354439f9205@mail.gmail.com>

On 4/23/05, Willem Ligtenberg <wligtenberg at gmail.com> wrote:
> so that will be sax.handler.feature_external_ges = "false"

Yes.

> And it will work?

Honestly, I'm not sure.  It should, but I've found these edge cases a
bit hard to predict in  the Python built-in libs :-(

> But what about using a catalog? I am very new to python and XML...

Catalogs allow you to rewrite the IDs for entities and such.  So if
you had an XML file with an entity at a URL, but you were working
offline, you could use a catalog to "redirect" the entity to a copy on
your local filesystem.

Problem, now that I think of it, is that I'm not sure you can specify
an catalog in PySAX.  You might instead have to override the method
entityResolver in your handler (and be sure to ).  See the example in
listing 1 and and discussion here:

http://www.xml.com/pub/a/2005/03/02/pyxml.html

Good luck.

-- 
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Use CSS to display XML, part 2 -
http://www-128.ibm.com/developerworks/edu/x-dw-x-xmlcss2-i.html
XML Output with 4Suite & Amara -
http://www.xml.com/pub/a/2005/04/20/py-xml.htmlUse XSLT to prepare XML
for import into OpenOffice Calc -
http://www.ibm.com/developerworks/xml/library/x-oocalc/
Schema standardization for top-down semantic transparency -
http://www-128.ibm.com/developerworks/xml/library/x-think31.html


From pballard at ozemail.com.au  Mon Apr  4 09:11:29 2005
From: pballard at ozemail.com.au (pballard at ozemail.com.au)
Date: 4 Apr 2005 06:11:29 -0700
Subject: DIY Spam Filter in Python
In-Reply-To: <mailman.1285.1112611396.1799.python-list@python.org>
References: <9d5509fa.0504040039.526c93b6@posting.google.com>
	<mailman.1285.1112611396.1799.python-list@python.org>
Message-ID: <1112620289.319116.241640@o13g2000cwo.googlegroups.com>

Tim Churches wrote:
> Peter Ballard wrote:
[snip]
> > Source code, and a bit of documentation, is at:
> > http://members.ozemail.com.au/~pballard/diyspamfilter.html

> Pete mate,
>
> Nice work, but your Web page on your DIY Spam Filter doesn't mention
> SpamBayes, which is surely the definitive Pythonic spam filter, as
well
> as being eerily effective - see http://spambayes.sourceforge.net

Yeah, I found out about SpamBayes a while ago, but it was after I
already had my DIY filter up and running.

--
Regards,

Peter Ballard
Adelaide, AUSTRALIA
http://members.ozemail.com.au/~pballard/



From tim.peters at gmail.com  Thu Apr  7 14:37:42 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Thu, 7 Apr 2005 14:37:42 -0400
Subject: struct enhancements?
In-Reply-To: <1112885184.815268.265560@l41g2000cwc.googlegroups.com>
References: <1112885184.815268.265560@l41g2000cwc.googlegroups.com>
Message-ID: <1f7befae0504071137ef58129@mail.gmail.com>

[lee_merrill at yahoo.com]
> I would like to be able to pack/unpack 8-byte longs, ...

Have you tried struct's 'q' or 'Q' format codes?


From berislav.lopac at lopsica.com  Wed Apr 13 03:15:34 2005
From: berislav.lopac at lopsica.com (Berislav Lopac)
Date: Wed, 13 Apr 2005 09:15:34 +0200
Subject: Web Application Client Module
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
Message-ID: <d3igum$tui$1@garrison.globalnet.hr>

Raffi wrote:
> Hi All,
>
> I hope I'm posting this question to the correct newsgroups. We have a
> web based database application that's accessed using IE. The
> application opens a popup window to run in. With all the popup
> blockers and compromised browsers out there, I'm looking into
> developing a web based custom client side application to access the
> application with. The application will be developed to only reach the
> web application site using the https protocol. It also needs to
> javascript enabled. It will be downloaded from the main web site and
> used to access the database application.
>
> Any suggestions/ideas on how to go about developing the client
> application? What tools tools are out there for such a project.

http://msdn.microsoft.com/library/default.asp?url=/workshop/author/hta/hta_node_entry.asp 




From richie at entrian.com  Thu Apr 14 04:06:50 2005
From: richie at entrian.com (Richie Hindle)
Date: Thu, 14 Apr 2005 09:06:50 +0100
Subject: Compute pi to base 12 using Python?
In-Reply-To: <6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
Message-ID: <3j8s51ppq9hbcdkkrcham483qfadd05666@4ax.com>


[Dan]
> Now you've got me curious.  Why would an artist want the first 3003
> digits of pi to the base 12?

[Dick]
> He says,
> Do you know how I can get "base12 pi"?
> Because the chromatic scale is base12.
> c c# d d# e f f# g g# a a# b

He should read Douglas Adams' fictional essay "Music and Fractal
Landscapes", from "Dirk Gently's Holistic Detective Agency":

 "I believe that there must be a form of
  music inherent in nature, in natural objects, in the patterns
  of natural processes.  A  music that would be as deeply
  satisfying as any naturally occurring beauty [...]"

You can see the text here:


http://66.102.9.104/search?q=cache:3Ni6gRXCcJgJ:tash.dns2go.com/FTP/P800/Books%2520txt/Douglas%2520Adams%2520-%2520Dirk%2520Gently%27s%2520Holistic%2520Detective%2520Agency.txt+%22douglas+adams%22+%22Music+and+Fractal+Landscapes%22&hl=en

or via this tinyurl:

  http://tinyurl.com/6ugnk

(Search within that page for the phrase "Music and Fractal Landscapes".
Or Google for it, which is how I found the link.)

-- 
Richie Hindle
richie at entrian.com



From huzaifa at hostway.com  Tue Apr 26 14:54:17 2005
From: huzaifa at hostway.com (Huzaifa Tapal)
Date: Tue, 26 Apr 2005 13:54:17 -0500
Subject: HTTPSConnection in persistent environment
Message-ID: <426E8E59.2060804@hostway.com>

is it reccommended to us the HTTPSConnection object to make socket 
connections in a multithreaded persistent environment?  The reason I ask 
is that I am having intermittent problems with possibly stale socket 
objects being return from the _socket module which is causing some pain 
in my application.

Any help would be appreciated.

Hozi



From kent37 at tds.net  Fri Apr 22 17:14:09 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 22 Apr 2005 17:14:09 -0400
Subject: Threading question
In-Reply-To: <1114196933.272932.50640@f14g2000cwb.googlegroups.com>
References: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>
	<42694464$1_1@newspeer2.tds.net>
	<1114196933.272932.50640@f14g2000cwb.googlegroups.com>
Message-ID: <426964d3$1_2@newspeer2.tds.net>

codecraig wrote:
> Kent,
>    thanks for the idea of doSomethingThreaded....that's really cool!

You're welcome, and welcome to Python. I am a convert from Java myself.

You will find that many things that you would do with inner classes in Java, you can do much more 
directly with function references in Python. First class functions are your friends :-)

Kent


From mchlgdbt at hotmail.com  Fri Apr  8 15:39:44 2005
From: mchlgdbt at hotmail.com (mchl gdbt)
Date: Fri, 08 Apr 2005 15:39:44 -0400
Subject: problem saving tif files with PIL
Message-ID: <BAY9-F21CE02DE11077B72B31138D03F0@phx.gbl>


Hi,

I have several thousand tiffs generated by application A which are read by 
application B. I need to remove a few colours from the tiffs and I decided 
to try with the python imaging library.

Running under debug mode permits saving my tiff files (with Image.DEBUG=0, 
the save doesn't work! see below) , but it truncates the crazy tags in my 
tiff and changes the resolution of the image

I realized the resolution had changed when app B spit out garbage and 
checked in GIMP which confirmed that the resolution had been changed. The 
number of pixels is the same.  it went from 96x96ppi as 11.771 x 9.771  to 
72 x 72ppi at 15.694 x 13.028, so # of pixels 1130 x 938

Ideally, I want the output image to be identical to the original in every 
way.  I suspect that it might be enough to just change the size numbers 
though I don't know how.  I will be messing around with the pixel colours 
eventually but the structure of the image must remain basically identical so 
that application B works as before.

Any suggestions?

Thanks for any help,
Michael

This the screen output from my idle run.
1) open image
2) save image (doesn't work)
3) debug = 1
4) open image
5) save image (works) fewer tags it seems
6) reload saved image, fewer tags, different resolution, though this is not 
apparent within python

im = Image.open(r"c:\image1.tif")
>>>im.save("C:\\test.tif")
Traceback (most recent call last):
  File "<pyshell#9>", line 1, in ?
    im.save("C:\\test.tif")
  File "C:\Local Program Files\Python23\lib\site-packages\PIL\Image.py", 
line 1136, in save
    SAVE[string.upper(format)](self, fp, filename)
  File "C:\Local Program 
Files\Python23\lib\site-packages\PIL\TiffImagePlugin.py", line 677, in _save
    offset = ifd.save(fp)
  File "C:\Local Program 
Files\Python23\lib\site-packages\PIL\TiffImagePlugin.py", line 356, in save
    data = string.join(map(o32, value), "")
  File "C:\Local Program 
Files\Python23\lib\site-packages\PIL\TiffImagePlugin.py", line 55, in ol32
    return chr(i&255) + chr(i>>8&255) + chr(i>>16&255) + chr(i>>24&255)
TypeError: unsupported operand type(s) for &: 'str' and 'int'

Image.DEBUG=1
>>>im = Image.open(r"c:\image1.tif")
tag: NewSubfileType (254) - type: long (4) - value: (2,)
tag: ImageWidth (256) - type: long (4) - value: (1130,)
tag: ImageLength (257) - type: long (4) - value: (938,)
tag: BitsPerSample (258) - type: short (3) - value: (8, 8, 8)
tag: Compression (259) - type: short (3) - value: (1,)
tag: PhotometricInterpretation (262) - type: short (3) - value: (2,)
tag: StripOffsets (273) - type: long (4) - value: (3980, 10760, 17540, 
24320, 31100, 37880, 44660, 51440, 58220, 65000, 71780, 78560, 85340, 92120, 
98900, 105680, 112460, 119240, 126020, 132800, 139580, 146360, 153140, 
159920, 166700, 173480, 180260, 187040, 193820, 200600, 207380, 214160, 
220940, 227720, 234500, 241280, 248060, 254840, 261620, 268400, 275180, 
281960, 288740, 295520, 302300, 309080, 315860, 322640, 329420, 336200, 
342980, 349760, 356540, 363320, 370100, 376880, 383660, 390440, 397220, 
404000, 410780, 417560, 424340, 431120, 437900, 444680, 451460, 458240, 
465020, 471800, 478580, 485360, 492140, 498920, 505700, 512480, 519260, 
526040, 532820, 539600, 546380, 553160, 559940, 566720, 573500, 580280, 
587060, 593840, 600620, 607400, 614180, 620960, 627740, 634520, 641300, 
648080, 654860, 661640, 668420, 675200, 681980, 688760, 695540, 702320, 
709100, 715880, 722660, 729440, 736220, 743000, 749780, 756560, 763340, 
770120, 776900, 783680, 790460, 797240, 804020, 810800, 817580, 824360, 
831140, 837920, 844700, 851480, 858260, 865040, 871820, 878600, 885380, 
892160, 898940, 905720, 912500, 919280, 926060, 932840, 939620, 946400, 
953180, 959960, 966740, 973520, 980300, 987080, 993860, 1000640, 1007420, 
1014200, 1020980, 1027760, 1034540, 1041320, 1048100, 1054880, 1061660, 
1068440, 1075220, 1082000, 1088780, 1095560, 1102340, 1109120, 1115900, 
1122680, 1129460, 1136240, 1143020, 1149800, 1156580, 1163360, 1170140, 
1176920, 1183700, 1190480, 1197260, 1204040, 1210820, 1217600, 1224380, 
1231160, 1237940, 1244720, 1251500, 1258280, 1265060, 1271840, 1278620, 
1285400, 1292180, 1298960, 1305740, 1312520, 1319300, 1326080, 1332860, 
1339640, 1346420, 1353200, 1359980, 1366760, 1373540, 1380320, 1387100, 
1393880, 1400660, 1407440, 1414220, 1421000, 1427780, 1434560, 1441340, 
1448120, 1454900, 1461680, 1468460, 1475240, 1482020, 1488800, 1495580, 
1502360, 1509140, 1515920, 1522700, 1529480, 1536260, 1543040, 1549820, 
1556600, 1563380, 1570160, 1576940, 1583720, 1590500, 1597280, 1604060, 
1610840, 1617620, 1624400, 1631180, 1637960, 1644740, 1651520, 1658300, 
1665080, 1671860, 1678640, 1685420, 1692200, 1698980, 1705760, 1712540, 
1719320, 1726100, 1732880, 1739660, 1746440, 1753220, 1760000, 1766780, 
1773560, 1780340, 1787120, 1793900, 1800680, 1807460, 1814240, 1821020, 
1827800, 1834580, 1841360, 1848140, 1854920, 1861700, 1868480, 1875260, 
1882040, 1888820, 1895600, 1902380, 1909160, 1915940, 1922720, 1929500, 
1936280, 1943060, 1949840, 1956620, 1963400, 1970180, 1976960, 1983740, 
1990520, 1997300, 2004080, 2010860, 2017640, 2024420, 2031200, 2037980, 
2044760, 2051540, 2058320, 2065100, 2071880, 2078660, 2085440, 2092220, 
2099000, 2105780, 2112560, 2119340, 2126120, 2132900, 2139680, 2146460, 
2153240, 2160020, 2166800, 2173580, 2180360, 2187140, 2193920, 2200700, 
2207480, 2214260, 2221040, 2227820, 2234600, 2241380, 2248160, 2254940, 
2261720, 2268500, 2275280, 2282060, 2288840, 2295620, 2302400, 2309180, 
2315960, 2322740, 2329520, 2336300, 2343080, 2349860, 2356640, 2363420, 
2370200, 2376980, 2383760, 2390540, 2397320, 2404100, 2410880, 2417660, 
2424440, 2431220, 2438000, 2444780, 2451560, 2458340, 2465120, 2471900, 
2478680, 2485460, 2492240, 2499020, 2505800, 2512580, 2519360, 2526140, 
2532920, 2539700, 2546480, 2553260, 2560040, 2566820, 2573600, 2580380, 
2587160, 2593940, 2600720, 2607500, 2614280, 2621060, 2627840, 2634620, 
2641400, 2648180, 2654960, 2661740, 2668520, 2675300, 2682080, 2688860, 
2695640, 2702420, 2709200, 2715980, 2722760, 2729540, 2736320, 2743100, 
2749880, 2756660, 2763440, 2770220, 2777000, 2783780, 2790560, 2797340, 
2804120, 2810900, 2817680, 2824460, 2831240, 2838020, 2844800, 2851580, 
2858360, 2865140, 2871920, 2878700, 2885480, 2892260, 2899040, 2905820, 
2912600, 2919380, 2926160, 2932940, 2939720, 2946500, 2953280, 2960060, 
2966840, 2973620, 2980400, 2987180, 2993960, 3000740, 3007520, 3014300, 
3021080, 3027860, 3034640, 3041420, 3048200, 3054980, 3061760, 3068540, 
3075320, 3082100, 3088880, 3095660, 3102440, 3109220, 3116000, 3122780, 
3129560, 3136340, 3143120, 3149900, 3156680, 3163460, 3170240, 3177020)
tag: Orientation (274) - type: short (3) - value: (1,)
tag: SamplesPerPixel (277) - type: short (3) - value: (3,)
tag: RowsPerStrip (278) - type: long (4) - value: (2,)
tag: StripByteCounts (279) - type: long (4) - value: (6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 
6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780, 6780)
tag: XResolution (282) - type: rational (5) - value: ((96, 1),)
tag: YResolution (283) - type: rational (5) - value: ((96, 1),)
tag: PlanarConfiguration (284) - type: short (3) - value: (1,)
tag: ResolutionUnit (296) - type: short (3) - value: (2,)
tag: PageNumber (297) - type: short (3) - value: (0, 0)
*** Summary ***
- compression: raw
- photometric_interpretation: 2
- planar_configuration: 1
- size: (1130, 938)
format key: (2, 1, (8, 8, 8), ())
- raw mode: RGB
- pil mode: RGB
>>>im.save("C:\\test.tif")
save: ImageWidth (256) - value: (1130,)
save: ImageLength (257) - value: (938,)
save: BitsPerSample (258) - value: (8, 8, 8)
save: Compression (259) - value: (1,)
save: PhotometricInterpretation (262) - value: (2,)
save: StripOffsets (273) - value: (0,)
save: SamplesPerPixel (277) - value: (3,)
save: RowsPerStrip (278) - value: (938,)
save: StripByteCounts (279) - value: (3179820,)
imnew= Image.open("C:\\test.tif")
tag: ImageWidth (256) - type: short (3) - value: (1130,)
tag: ImageLength (257) - type: short (3) - value: (938,)
tag: BitsPerSample (258) - type: short (3) - value: (8, 8, 8)
tag: Compression (259) - type: short (3) - value: (1,)
tag: PhotometricInterpretation (262) - type: short (3) - value: (2,)
tag: StripOffsets (273) - type: long (4) - value: (128,)
tag: SamplesPerPixel (277) - type: short (3) - value: (3,)
tag: RowsPerStrip (278) - type: short (3) - value: (938,)
tag: StripByteCounts (279) - type: long (4) - value: (3179820,)
*** Summary ***
- compression: raw
- photometric_interpretation: 2
- planar_configuration: 1
- size: (1130, 938)
format key: (2, 1, (8, 8, 8), ())
- raw mode: RGB
- pil mode: RGB

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From steven.bethard at gmail.com  Wed Apr 13 03:27:20 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 01:27:20 -0600
Subject: Doubt regarding sorting of a list specific field
In-Reply-To: <425cc854$0$1959$626a14ce@news.free.fr>
References: <mailman.1817.1113371391.1799.python-list@python.org>
	<6omdnTAhJfc-W8HfRVn-oQ@comcast.com>
	<425cc854$0$1959$626a14ce@news.free.fr>
Message-ID: <X5idnYt-5fFIVMHfRVn-hA@comcast.com>

F. Petitjean wrote:
> Le Wed, 13 Apr 2005 01:13:40 -0600, Steven Bethard a ?crit :
> 
>>praba kar wrote:
>>
>>>list = [[1234,'name1'],[2234,'name2'],[0432,'name3']]
>>>
>>>I want to sort only numeric value having array field.
>>>How I need to do for that. 
>>
>>In Python 2.4:
>>
>>py> import operator
>>py> seq = [(1234,'name1'),(2234,'name2'),(1432,'name3')]
>>py> seq.sort(key=operator.itemgetter(0))
>>py> seq
>>[(1234, 'name1'), (1432, 'name3'), (2234, 'name2')]
>>
>>Note that I've changed your name 'list' to 'seq' since 'list' is 
>>shadowing the builtin list function in your code, and I've changed your 
>>nested lists to tuples because they look like groups of differently 
>>typed objects, not sequences of similarly typed objects.  See:
>>
>>STeVe
> 
> nice explaination. But, if the items of the list are tuples the default
> rule for comparing tuples is such that
> seq.sort()
> would be sufficient here.

See my other post in this thread.  seq.sort() is not stable; if the OP's 
list looked like:
    [(1234,'name3'), (1234,'name1')]
then calling seq.sort() would give
    [(1234,'name1'), (1234,'name3')]
instead of
    [(1234,'name3'), (1234,'name1')]
which is what I assumed the OP wanted when he said "I want to sort only 
numeric value".

STeVe


From martin at v.loewis.de  Sun Apr  3 01:32:09 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 03 Apr 2005 08:32:09 +0200
Subject: Decorator Dissection
In-Reply-To: <g3tt411e3ag0sak0ehckmsl3dou92sjuei@4ax.com>
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
	<prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>
	<d2mqcl$r6t$02$1@news.t-online.com>
	<g3tt411e3ag0sak0ehckmsl3dou92sjuei@4ax.com>
Message-ID: <424F8DE9.7070501@v.loewis.de>

Ron_Adam wrote:
> I wasn't aware that the form:
> 
> 	result = function(args)(args)
> 
> Was a legal python statement.
> 
> So python has a built in mechanism for passing multiple argument sets
> to nested defined functions! (click)  Which means this is a decorator
> without the decorator syntax.

No. There is no mechanism for passing multiple argument sets to
nested functions. Instead, functions are objects, which can be
assigned to variables, passed as arguments to other functions,
and returned:

 >>> len
<built-in function len>
 >>> other=len
 >>> other([1,2,3])
3
 >>> other
<built-in function len>

Here, len is *an object* that gets *assigned to* the variable other.
The grammatical construct

    <something>(<list of something>)

is evaluated as follows:

1. evaluate <something>. Evaluation always returns an object,
    be it 1+2, other, or f(x).
2. evaluate <list of something>, from left to right.
3. call the object returned in step 1, with the arguments
    computed in step 2.

Because the something before the parentheses can be any expression,
you can also write things like

 >>> items=[]
 >>> items.append(len)
 >>> items[0](range(10))
10

Functions as parameters and return values are not much different:

 >>> def identity(x):
...   return x
...
 >>> identity(len)(range(10))
10

Now, a nested function is locally defined, but then the function
is returned

 >>> def getlenfun():
...   def lenfun(o):
...     return 2*len(o)
...   return lenfun
...
 >>> getlenfun()(range(10))
20

Here, first getlenfun() is evaluated, returning a function lenfun.
Then, range(10) is evaluated, returning a list. Then, lenfun is
invoked with this list.

So far, this has nothing to do with decorators.

> So this isn't a decorator question any more.  Each argument gets
> passed to the next inner defined function,  via... a stack(?)  ;)

No, functions are objects. Notice that in step 1, the object returned
doesn't have to be a function - other things are callable, too, like
types, classes, and objects implementing __call__.

Regards,
Martin


From sjmachin at lexicon.net  Tue Apr 19 23:07:00 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 20 Apr 2005 13:07:00 +1000
Subject: Importing some functions from a py file
References: <mailman.2143.1113963196.1799.python-list@python.org>
Message-ID: <n6gb61pvu27nnt20n92p56crs64t4vttu0@4ax.com>

On Tue, 19 Apr 2005 19:13:13 -0700 (PDT), Anthony Liu
<antonyliu2002 at yahoo.com> wrote:
>I think I got confused by the python import facility.
>Say, in code1.py I have func1, func2, func3 and main.
>In code2.py, I *only* want to use func2 from code1.py.
>So, I did
>
>from code1 import func2
>
>But every time, I run code2.py, the main() of code1.py
>is run.
>
>I don't know why.  Any hint please?  Thanks.

*All* of code1.py is executed when you import all or parts of it.

code1.py should look something like this:
===
import some, modules, maybe

def func1():
    do_sth_1()

def func2():
    do_sth_2()

def main():
    do sth_m()

if __name__ == "__main__":
    main()
=== 

The import, the defs, and the "if" and anything else you have at the
top level are statements that are executed.

If you run code1.py as a script, the if test passes, and main() is
invoked. Otherwise (you import all or bits of the code1 module), the
if test fails, and main() is not invoked.

Possibilities: (a) In your real code1.py, you don't actually have "def
main()", you have do_sth_m() at the top level, and it is being
executed unconditionally (b) you do have "def main()" as per my
example, but you have an unguarded "main()" at the top level (c)
something that we can't guess -- you may have to post a more detailed 
description (cut-down version of the actual code would be a good
idea!).

HTH,
John



From kasimov at i.com.ua  Thu Apr 21 12:42:02 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Thu, 21 Apr 2005 19:42:02 +0300
Subject: goto statement
In-Reply-To: <1114100669.807737.192320@l41g2000cwc.googlegroups.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
	<1114100669.807737.192320@l41g2000cwc.googlegroups.com>
Message-ID: <d48la8$onm$1@news.tsystems.kiev.ua>

pythonUser_07 wrote:
> Hi,
> 
> Have you tried the triple quote comment technique?
> 
> I am assuming you want to skip some code for the time being.
> 
> Here is an example
> 
> print "hello world"
> ''' COMMENT OUT FOR NOW
> someFunction()
> someOtherFunction()
> '''
> print "goodbye world"
> 
> This means that you have only two locations to remove the blocked out
> code.  This is identical to having to remove the goto statement and the
> marker.
> 
> Hope that helps.
> 

how do use this here:

print "hello world"
...
...
...
sql = '''
some long query
'''
...
...
...
sql = """
another query
"""
...
...
...
print "goodbye world"





-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From sjuranic at gmail.com  Tue Apr 19 11:49:25 2005
From: sjuranic at gmail.com (Steve Juranich)
Date: Tue, 19 Apr 2005 08:49:25 -0700
Subject: Extending base class methods
In-Reply-To: <1113924448.132914.94300@g14g2000cwa.googlegroups.com>
References: <1113919270.802463.54310@l41g2000cwc.googlegroups.com>
	<mailman.2103.1113920477.1799.python-list@python.org>
	<1113924448.132914.94300@g14g2000cwa.googlegroups.com>
Message-ID: <56190b6c0504190849745cda48@mail.gmail.com>

On 19 Apr 2005 08:27:28 -0700, henrikpierrou at hotmail.com
<henrikpierrou at hotmail.com> wrote:
> Ok, i'll try that. But what about the recommendation in the tutorial,
> is that not possible?

In the new (2.4) version of the Tutorial, that statement has been
removed.  What you're using has been called "old-style" classes for
quite a while now (since 2.0?).  Any new Python code should really be
using the "new-style" classes (inherit from "object" and use things
like "super".

But FWIW, it appears to still work with Python 2.4:

#---------- <snip FILE="Foo.py"> -----------------
class Foo:
    def foo(self):
        print "foo"

class Bar(Foo):
    def foo(self):
        print "bar"
        Foo.foo(self)
#----------- </snip> ------------


# Now in the Python interpreter:

>>> from Foo import *
>>> f = Foo()
>>> f.foo()
foo
>>> b = Bar()
>>> b.foo()
bar
foo

So nothing jumps out to me that you did obviously wrong, sorry.  But
in general my advice would be to switch to using "new-style" classes.

HTH
-- 
Steve Juranich
Tucson, AZ
USA


From bokr at oz.net  Sun Apr 17 22:03:22 2005
From: bokr at oz.net (Bengt Richter)
Date: Mon, 18 Apr 2005 02:03:22 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
Message-ID: <4262e25b.207992156@news.oz.net>

On 17 Apr 2005 09:27:34 -0700, "Kay Schluehr" <kay.schluehr at gmx.net> wrote:

>> Exactly. Except the above example is from the day-old-bread
>items-tuple-returning version of :: ;-)
>> And with an ordered dict subtype there is no need for the generator
>expression either,
>> since there is a values method for dicts (which in the subtype would
>preserve order). E.g.,
>>
>>  x = property(*seq) where:
>>              seq = (::
>>                  def get_x():
>>                      return self.__x
>>                  def set_x(value):
>>                      self.__x = value
>>                  del_x = None
>>                  doc   = "I'm the 'x' property." ).values())
>>
>> Or more directly:
>>
>>  x = property(*(::
>>                  def get_x():
>>                      return self.__x
>>                  def set_x(value):
>>                      self.__x = value
>>                  del_x = None
>>                  doc   = "I'm the 'x' property." ).values())
>
>Hmmm ... now You eliminate "where" completely in favor for '::'. This
>may be reasonable because '::' is stronger and less context dependent.
>But on the other hand it may be also reasonable to eliminate '::'
>towards a stronger "where" ;)
>
>
>x = property(**kw) where kw:
>            doc = "I'm the 'x' property."
>            def fget(self):
>                return self.__x
>
>
>x = property(*args) where args:
>            def fget(self):
>                return self.__x
>            fset = None
>            fdel = None
>            doc = "I'm the 'x' property."
>
I like this. But how would you put "where args:" and "where kw:" if you needed both?
also, is it looking back to see the '*' or '**' to do (::x=1).values vs. (::x=1)
and how about (::x=1).keys() or (::x=1).items() ? And what if you wanted to pass
(::x=1) as a dict object without ** expansion into a keyword dict?

Maybe we need asterisks on both ends. e.g.,

    foo(dct, values, *args, **kw):
       where **dct:
          x=1
       where *values:
          x=2
       where *args:
          x=3
       where **kw:
          x=4

But that still doesn't give you, e.g.,

       foo(keys) where:
           keys=sorted((::
               from interesting.module import *
           ).keys())

I like clean sugar, but I still want to be able to
get at the general primitives to compose them in ways
that can't be anticipated until a use case comes up.
And then if the primitives are inaccessible, one is
out of luck or doomed to workaround hacking ;-)

>
>Put definitions into a list:
>
>l = list(*args) where args:
>        def fget(self):
>            return self.__x
>        doc = "I'm the 'x' property."
>
>
>Nest suites:
>
>x = property(*args) where args:
>        t = tuple(*t) where t:
>            def fget(self):
>                return self.__x
>            fset = None
>            fdel = None
>            doc = "I'm the 'x' property."
>
>
>Evaluate conditions:
>
>if f(*args)==1 where args:
>   x = 1
>   y = 2
>
>I think this version is more mainstream syntax ( and without braces and
>additional punctuation ) than the unary prefix operator '::' which
>drops statements into expressions within expressions.
>
I like this mainstream syntax for ordinary use cases, but as mentioned,
I'd still like to have primitives accessible. I don't see why both
couldn't live in harmony ;-)

Regards,
Bengt Richter


From anthony.hornby at cdu.edu.au  Wed Apr 13 22:28:40 2005
From: anthony.hornby at cdu.edu.au (anthony hornby)
Date: Thu, 14 Apr 2005 11:58:40 +0930
Subject: Text & Unicode processing references on the web.
In-Reply-To: <4257C083.3060902@v.loewis.de>
References: <mailman.1594.1113009034.1799.python-list@python.org>
	<4257C083.3060902@v.loewis.de>
Message-ID: <1113445720.10861.3.camel@styx.cdu.edu.au>

Hi Martin,
Thanks for the useful links :-)

Anthony.

On Sat, 2005-04-09 at 13:46 +0200, "Martin v. L?wis" wrote:
> anthony hornby wrote:
> > Can anyone point out some good "Python & Unicode" and "Python & Text
> > processing" resources on the net to get me started? Any good book
> > recommendations?
> 
> As a quick Unicode tutorial, I'd recommend
> 
> http://www.jorendorff.com/articles/unicode/python.html
> http://www.egenix.com/files/python/Unicode-EPC2002-Talk.pdf
> 
> For text processing, you should read the "Strings" section of the
> library reference:
> 
> http://www.python.org/doc/current/lib/strings.html
> 
> Notice there is also a separate section on SGML/XML
> 
> http://www.python.org/doc/current/lib/markup.html
> 
> PyXML has its own documentation page, on
> 
> http://pyxml.sourceforge.net/topics/docs.html
> 
> As for book recommendations: What language? I would recommend
> 
> Fischbeck, v. L?wis: Python 2
> 
> :-) It covers all of these topics.
> 
> Regards,
> Martin
-- 



From jmeile at hotmail.com  Tue Apr  5 09:49:29 2005
From: jmeile at hotmail.com (Josef Meile)
Date: Tue, 05 Apr 2005 15:49:29 +0200
Subject: check interpreter version before running script
In-Reply-To: <d2u1v8$n8t$1@solaris.cc.vt.edu>
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
Message-ID: <42529769.4050007@hotmail.com>

> Is there a recommended or 'Best Practices' way of checking the version 
> of python before running scripts? I have scripts that use the os.walk() 
> feature (introduced in 2.3) and users running 2.2 who get errors. 
> Instead of telling them, 'Upgrade you Python Install, I'd like to use 
> sys.version or some other way of checking before running.
> 
> Whatever I do, I need it to work on Linux, Mac and Windows.
> 
> I thought of sys.version... but getting info out of it seems awkward to 
> me. First 5 chars are '2.4.1' in string format have to split it up and 
> convert it to ints to do proper checking, etc. It doesn't seem that 
> sys.version was built with this type of usage in mind. So, what is the 
> *best* most correct way to go about this?
> 
What's about:
 >>> import sys
 >>> print sys.version_info
(2, 1, 3, 'final', 0)

Regards,
Josef



From radam2 at tampabay.rr.com  Thu Apr  7 12:28:23 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Thu, 07 Apr 2005 16:28:23 GMT
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com>
	<mailman.1429.1112794393.1799.python-list@python.org>
	<d33ij3$9jj$1@panix2.panix.com>
Message-ID: <idna51pof93qshrpr3lq3flm8cdpapkdld@4ax.com>

On 7 Apr 2005 11:11:31 -0400, aahz at pythoncraft.com (Aahz) wrote:

>You're conflating two different things:
>
>* Whether Python currently has only one way to do things
>
>* Whether Python has a design goal of only one way to do things
>
>I'll agree that Python currently has many examples of more than one way
>to do things (and even Python 3.0 won't remove every example, because
>anything more complicated than a Turing Machine has more than one way to
>do things).  But I won't agree that Only One Way has been abandoned as a
>design principle.

I would add that the meaning is:

	Python has one obvious best way to do things.

Meaning that the most obvious and clearest way, the way that comes to
mind first, will in most cases, also be the best way.

I seem to remember reading it put in that way some place at some time.




From mahs at telcopartners.com  Wed Apr 20 15:33:59 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 20 Apr 2005 12:33:59 -0700
Subject: Array of Chars to String
In-Reply-To: <4266a4d1$1_2@newspeer2.tds.net>
References: <mailman.2133.1113942800.1799.python-list@python.org>	<42658990.7739398@news.oz.net>	<mailman.2139.1113953291.1799.python-list@python.org>	<d44uiv$it1$04$1@news.t-online.com>	<mailman.2198.1114021232.1799.python-list@python.org>
	<4266a4d1$1_2@newspeer2.tds.net>
Message-ID: <d46aiq$4qc$1@sea.gmane.org>

Kent Johnson wrote:
> Michael Spencer wrote:
> 
>> Anyway, here are the revised timings...
>>  ...     print shell.timefunc(func_translate1, "Bob Carol Ted Alice" * 
>> multiplier, 'adB')
> 
> 
> What is shell.timefunc?
> 

This snippet, which I attach to my interactive shell, since I find timeit 
awkward to use in that context:

def _get_timer():
     if sys.platform == "win32":
         return time.clock
     else:
         return time.time
     return

def timefunc(func, *args, **kwds):
     timer = _get_timer()
     count, totaltime = 0, 0
     while totaltime < 0.5:
         t1 = timer()
         res = func(*args, **kwds)
         t2 = timer()
         totaltime += (t2-t1)
         count += 1
     if count > 1000:
         unit = "usec"
         timeper = totaltime * 1000000 / count
     else:
         unit = "msec"
         timeper = totaltime * 1000 / count
     return "%s(...)  %s iterations, %.2f%s per call" % \
                 (func.__name__, count, timeper, unit)

Michael



From steven.bethard at gmail.com  Fri Apr  8 21:46:16 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 08 Apr 2005 19:46:16 -0600
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <mailman.1575.1112994068.1799.python-list@python.org>
References: <d36hnj$6h6$1@sea.gmane.org>	<78f6595afdb48aabb9c72dfe549a543e@upf.edu>	<d36mds$l3q$1@sea.gmane.org>	<d36n3h$n0s$1@sea.gmane.org>
	<mailman.1575.1112994068.1799.python-list@python.org>
Message-ID: <dJCdnTddJ4h-rsrfRVn-rA@comcast.com>

jeremit0 wrote:
> Steve Holden wrote:
> 
>> If you want line numbers,. of course, then you can use
>>
>>   for linenum, line in enumerate(myfile.readlines()):
>>       ...
>>
>> Remember that true to Python's philosophy numbering will start at zero.
>>
> Is this any better than:
> 
>     lines = myfile.readlines()
>     for linenum in xrange(len(lines)):
>         # Do stuff with lines[linenum] ...

Well, if you use lines[linenum] often in that code, it'll be more 
efficient to use enumerate (or bind lines[linenum] to a name, which is 
basically what enumerate is doing for you).  Given the file test.py:

--------------------------------------------------
def elines(lines):
     for linenum, line in enumerate(lines):
         x = linenum
         y = line
         z = line

def xlines(lines):
     for linenum in xrange(len(lines)):
         x = linenum
         y = lines[linenum]
         z = lines[linenum]

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

Here's what I get with timeit:

[D:\Steve]$ python -m timeit -s"lines = range(10000); import test" 
"test.elines(lines)"
100 loops, best of 3: 2.85 msec per loop

[D:\Steve]$ python -m timeit -s"lines = range(10000); import test" 
"test.xlines(lines)"
100 loops, best of 3: 3.18 msec per loop

The other thing worth noting is that enumerate will work with any 
iterable, while your xrange technique won't.  Try:
     for linenum, line in enumerate(myfile):
         ...
and
     for linenum in xrange(len(myfile)):
         line = myfile[linenum]
         ...
and see what kind of cool errors you get with the xrange solution. :)

STeVe


From cesarbs at gmail.com  Sat Apr  9 14:40:47 2005
From: cesarbs at gmail.com (=?ISO-8859-1?Q?C=E9sar_Leonardo_Blum_Silveira?=)
Date: Sat, 9 Apr 2005 15:40:47 -0300
Subject: How to detect if file is a directory
Message-ID: <e724b24405040911402dd95f21@mail.gmail.com>

Hello all, I'm new to this list.

How can I detect if a file is a directory or not?

Thanks

C?sar


From fredrik at pythonware.com  Fri Apr 15 11:43:57 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 15 Apr 2005 17:43:57 +0200
Subject: py2exe - create one EXE
References: <1113579012.150708.118990@o13g2000cwo.googlegroups.com>
Message-ID: <d3on83$d71$1@sea.gmane.org>

"codecraig" wrote:

>  Is there a way to create one .exe using py2exe (or some other
> extension/utility that can do it)?
>
>  Basically i want to generate one .exe that contains everything my
> python app needs to run instead of having a .exe, some .zips, etc.

hmm.  if you cannot access google, how come you're able to post via
google groups?

here's the first google hit for "py2exe single exe"

    http://starship.python.net/crew/theller/moin.cgi/SingleFileExecutable

(that page also happens to be linked from the front page on the py2exe
support wiki)

</F> 





From jjl at pobox.com  Mon Apr  4 18:50:35 2005
From: jjl at pobox.com (John J. Lee)
Date: 04 Apr 2005 22:50:35 +0000
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07>
Message-ID: <878y3y6ts4.fsf@pobox.com>

"Raymond Hettinger" <vze4rx4y at verizon.net> writes:

> [Peter Hansen]
> > (I'm not dissing py.test, and intend to check it
> > out.
> 
> Not to be disrepectful, but objections raised by someone
> who hasn't worked with both tools equate to hot air.
[...]

Why?  Peter had a reasonable question which, AFAICT, doesn't depend on
any more detailed knowledge that what he had to work with.

What I don't understand about py.test (and trying it out seems
unlikely to answer this) is why it uses the assert statement.
unittest used to do that, too, but then it was pointed out that that
breaks when python -O is used, so unittest switched to self.assert_
&c.  Does py.test have some way around that?


John


From programmer.py at gmail.com  Mon Apr 25 08:44:44 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Mon, 25 Apr 2005 07:44:44 -0500
Subject: figuring out # of bytes
In-Reply-To: <d52c72d2050422133716bada33@mail.gmail.com>
References: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
	<d52c72d2050422133716bada33@mail.gmail.com>
Message-ID: <d52c72d2050425054450ce2cfc@mail.gmail.com>

On 4/22/05, Jaime Wyant <programmer.py at gmail.com> wrote:
> On 22 Apr 2005 13:28:57 -0700, codecraig <codecraig at gmail.com> wrote:
> > i want to the number of bytes in a string...
> >
> > is, len(x) accurate?
> >
> > so, x = "hi"
> > len(x) == 2 ....so that means two bytes?
> >
> > thanks
> 
> No, that means that the string is two bytes in length.  The number of
> bytes is dependent on the encoding.  It seems like there was a thread
> on this subject recently.

Ughh, i misstated.   More correctly, the string is 2 "characters" in
length.  The number of bytes per character depends on the encoding.

jw


From sjmachin at lexicon.net  Fri Apr 15 22:20:28 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 16 Apr 2005 12:20:28 +1000
Subject: trouble using \ to escape %
References: <1113606334.524947.54630@l41g2000cwc.googlegroups.com>
Message-ID: <p8r061hk2riio8atoekvctdrh4ga6mj35u@4ax.com>

On 15 Apr 2005 16:05:34 -0700, "Lucas Machado" <LMachado1 at gmail.com>
wrote:

>I'm writing a python script that modifies the smb.conf file, and i need
>to write the characters '%U' in the file.  I tried making a string like
>so:
>
>str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%U" % (list[0], list[1],
>list[0], list[1])
>
>but i keep getting: "TypeError: not enough arguments for format
>string". I've also tried making the string:
>
>str1 = "[%s%s]\n\tpath = /mnt/samba/%s%s/\%" % (list[0], list[1],
>list[0], list[1])
>
>but i get: "ValueError: incomplete format". These errors lead me to
>believe that for some reason it is not escaping the '%' character.
>There has to be a way to write '%' to a file. Thanks in advance..

Looks like you've already got your answer, but here's some META-help:
what to do when you have a problem and your internet connection is
broken:

1. GUESS. Extrapolation from examples like DLE DLE in networking, $$
in m4 and \\ in *almost* everything might suggest trying %%

2. READ THE DOCS. Don't know what platform you're running on, but one
of what a recent blogger called "hopeless Windows people" [like me]
would do is this:

Start->Programs->Python 2.4->Python manuals, click on the Index tab,
type %, hit Enter ... scrolling down leads to a table of conversion
types, the last of which is the somewhat tautological """% No argument
is converted, results in a "%" character in the result."""

HTH,
John


From duncan.booth at invalid.invalid  Thu Apr 14 09:34:09 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 14 Apr 2005 13:34:09 GMT
Subject: sort of a beginner question about globals
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
Message-ID: <Xns963892E01D954duncanrcpcouk@127.0.0.1>

fred.dixon wrote:

> when i am roughing out my functions and classes i out a pass statement
> as my first line just as a place holder and a convenient place to put a
> break when i am testing. no other good reason.
> 

A better idea when roughing out functions and classes is to insert a 
docstring describing what the function is going to do. That way you don't 
have to use 'pass' at all, and you don't have to remember to remove 
anything when you later add code. Alternatively use 'raise 
NotImplementedError' to tell you at runtime if you hit any such functions.

'convenient place to put a break when testing' implies you test by stepping 
through with a debugger. You should consider writing unit tests as a way of 
reducing the amount of debugging you need to do.


From kasimov at i.com.ua  Wed Apr 20 11:38:40 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 18:38:40 +0300
Subject: goto statement
In-Reply-To: <70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
Message-ID: <d45t7e$fum$1@news.tsystems.kiev.ua>

Christos TZOTZIOY Georgiou wrote:
> On Wed, 20 Apr 2005 16:13:32 +0300, rumours say that Maxim Kasimov
> <kasimov at i.com.ua> might have written:
> 
> 
>>but what if i just can't to do this becouse i'm working thrue ssh, and have to use only installed editors (such as vi)
> 
> 
> If you use plain vi (not vim) and you want to comment e.g. 5 lines of
> code, go to the first of these five and:
> 
> - if autoindent type:
> 
> 	5>>O^Dif 0:{ESC}
> 
> ^D above is Ctrl-D, {ESC} is your Escape key
> 
> - if noautoindent type:
> 
> 	YP^Cif 0:{ESC}j5>>
> 
> ^C above is literal ^, literal C, *NOT* Ctrl-C; {ESC} is your Escape key
> 
> To control autoindent, you can type:
> 
> :se ai
> 
> or
> 
> :se noai
> 
> If you need more help, I would gladly send you the output of `man vi'
> from a non-GNU Unix.  I can also send you the output of `man vim' from a
> GNU system.

is it wrong to debug python script using python, but not some magic commands found somewhere in man ?

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From rkern at ucsd.edu  Wed Apr 27 17:04:18 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 27 Apr 2005 14:04:18 -0700
Subject: Lexicographical sort for numarray
In-Reply-To: <1114635125.849049.309880@l41g2000cwc.googlegroups.com>
References: <uOSdnUooRt4OufLfRVn-sg@comcast.com>
	<1114635125.849049.309880@l41g2000cwc.googlegroups.com>
Message-ID: <d4oueb$602$1@sea.gmane.org>

Jason Mobarak wrote:
> import numarray as na
> import random
> 
> # example array
> arr = range(100)
> random.shuffle(arr)
> arr = na.array(arr)
> arr = na.reshape(arr, (10,10))
> 
> print arr # not rowsort'ed
> 
> arr.flat.sort() # key line
> 
> print arr # rowsort'ed

That's definitely not a lexicographic sort.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From m at m.com  Fri Apr 29 04:02:42 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 16:02:42 +0800
Subject: OOP
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <4271ea20$1_1@rain.i-cable.com>

Although I am a newbie in programming, I read from a java book (in my native
language) saying that the purpose of Object Oriented Programming are:

1. Use a real world concept in constructing program (here everything are
objects with there properties and methods/actions);

2. Simplify coding;

3. and most important, faciliate the reuse of code (class, function, etc.)

> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.
>




From lothar at ultimathule.nul  Mon Apr  4 15:42:46 2005
From: lothar at ultimathule.nul (lothar)
Date: Mon, 4 Apr 2005 19:42:46 -0000
Subject: re module non-greedy matches broken
References: <mailman.1308.1112637220.1799.python-list@python.org>
Message-ID: <1153658nrs82j13@corp.supernews.com>

no - in the non-greedy regex
  <1st-pat><not-1st-pat>*?<follow-pat>

<1st-pat>, <not-1st-pat> and <follow-pat> are arbitrarily complex patterns.

with character classes and negative character classes you do not need
non-greediness anyway.


"John Ridley" <ojokimu at yahoo.co.uk> wrote in message
news:mailman.1308.1112637220.1799.python-list at python.org...
>
> --- lothar <lothar at ultimathule.nul> wrote:
> > how then, do i specify a non-greedy regex
> >   <1st-pat><not-1st-pat>*?<follow-pat>
> >
> > that is, such that non-greedy part <not-1st-pat>*?
> > excludes a match of <1st-pat>
> >
> > in other words, how do i write regexes for my examples?
>
> Not sure if I completely understand your explanation, but does this get
> any closer to what your looking for?
>
> >>> vwre = re.compile("V[^V]*?W")
> >>> newdoc = "V1WVVV2WWW"
> >>> re.findall(vwre, newdoc)
> ['V1W', 'V2W']
>
> That is: <pat1>, then <not-pat1> as few times as possible, then <pat2>
>
>
> John Ridley
>
> Send instant messages to your online friends http://uk.messenger.yahoo.com





From tjreedy at udel.edu  Sun Apr 10 23:34:51 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 10 Apr 2005 23:34:51 -0400
Subject: Behavioural identity - a short discussion
References: <1113165441.978711.64860@z14g2000cwz.googlegroups.com>
Message-ID: <d3cr3e$vn2$1@sea.gmane.org>


"Kay Schluehr" <kay.schluehr at gmx.net> wrote in message 
news:1113165441.978711.64860 at z14g2000cwz.googlegroups.com...
> class A(object):
>    def __init__(self):
>        raise NotImplemented
>
> We can regard class A as a "pure abstract" class. It is impossible to
> create instances of A.

You see that parameter 'self'?  When __init__ is called, it is bound to an 
already created instance of A.  How soon the last reference goes away I am 
not sure.  If you change the raise statement to 'raise 
SomeException(self)', then that instance will become bound to the 'args' 
attribute of the resulting exception object.  That exception object can in 
turn be get captured by an 'except SomeException, obj' statement.  The 
binding of 'obj' persists after the except statement.

To abort object creation, write a metaclass with __new__ and raise an 
exception there.

> Thinking in Python makes live easier because we can not only
> check interfaces superficially but we can inspect the code and we can
> compare two code-objects on the behavioural level with a certain
> accuracy.

You are actually thinking in terms of the CPython implementation, not 
Python itself, which is fine as long as you don't expect CPython-specific 
introspection to work with other implementations.  But it is pretty neat 
sometimes.

Terry J. Reedy





From andreas at kostyrka.org  Tue Apr 26 15:24:30 2005
From: andreas at kostyrka.org (andreas at kostyrka.org)
Date: Tue, 26 Apr 2005 21:24:30 +0200
Subject: delete will assure file is deleted?
In-Reply-To: <pan.2005.04.26.19.13.19.951487@jerf.org>
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
	<pan.2005.04.26.19.13.19.951487@jerf.org>
Message-ID: <20050426192430.GC26224@heaven.kostyrka.org>

On Tue, Apr 26, 2005 at 03:13:20PM -0400, Jeremy Bowers wrote:
> On Tue, 26 Apr 2005 03:40:16 -0700, ajikoe at gmail.com wrote:
> 
> > Hello Mike,
> > I have to know this topic otherwise my program has to check whether the
> > file / files are already deleted and this is a little bit messy.
> 
> I would be fairly confident in asserting that assuming the file is there,
> you have permissions, etc., basically that the call succeeds, that the
> file will be gone.
Not exactly. The system call is called remove not by accident. It's not
called delete. So for example if you have a file with multiple names (so called
hard links) the file will not be gone after os.remove('file')

> 
> os.remove, as the module name implies, tells the OS to do something. I
> would consider an OS that returned from a "remove" call, but still let you
> access that file, highly broken. 
Well, it has been the normal semantics with Unix for decades. Actually it's
the normal way to create temporary files that will be cleanuped when the program
exits:
f = open("temp")
os.remove("temp")
# now use f

f.close() # frees the temporary file
sys.exit(0) # exit is an implicit close too.

Andreas


From pgmoscatt at optushome.com.au  Mon Apr 18 07:49:31 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Mon, 18 Apr 2005 21:49:31 +1000
Subject: Can a function be called within a function ?
Message-ID: <42639ddc$0$5855$9a6e19ea@news.newshosting.com>


Is it possible to write code and allow a function to be called within
another like I have shown below ?

Pete



def populatelist():
        f=open(_globals.appath + "dxcluster.svr","r")
        while true:
                text = f.readline()
                if text =="":
                        break
                _list.append(string.strip(text))        
        f.close()
        
        
def serversettings():
        servers.main(root)
        if _globals.refresh=="yes":
                populatelist()   <----------------------- calling function above.




From stealthwang at gmail.com  Thu Apr  7 19:55:50 2005
From: stealthwang at gmail.com (lotmr)
Date: 7 Apr 2005 16:55:50 -0700
Subject: wxwindows event function arguments
Message-ID: <1112918150.576010.9940@f14g2000cwb.googlegroups.com>

I have a windows launch bar application that sits in the system tray.
What I want to do is when i click on a button in the launch menu, it
calls the event which then calls 'OnLaunch('path')' this does not seem
possible. When I change 'OnLaunch(self, event)' to 'OnLaunch(self,
event, path)' it says I dont have enough arguments. When I remove
'event', the OnLaunch runs as soon as the program loads. Using Google I
can absolutly not find a way to pass arguments to a function called by
a event. If indeed it is absolutly impossible, what could be the best
alternate possibility?

Any help would be appreciated,
Nils Lundquist

CODE:

from wxPython.wx import *
import os, sys
class MainWindow(wxFrame):
    def OnAbout (self, event):
        m = wxMessageDialog( self, " LUNCH Bar 0.1 \n"
                             " A launch bar written in Python using
wxWindows","About LUNCH", wxOK)
        m.ShowModal()
        m.Destroy
    def OnExit (self, event):
        self.tbi.Destroy()
        sys.exit()
    def OnTrayRight (self, event):
    	self.PopupMenu(self.rhtmenu)
    def OnLaunch (self, event):
        print event.GetString()
        path = 'D:\Program Files\Mozilla Firefox\Firefox.exe'
        os.startfile(path)
    def __init__(self,parent,id,title):
        wxID_FIREFOX = 1117
        wxFrame.__init__(self,parent,wxID_ANY, title, size = (
200,100),
            style=wxDEFAULT_FRAME_STYLE|wxNO_FULL_REPAINT_ON_RESIZE)
	self.tbi = wxTaskBarIcon()
	icon = wxIcon('package.ico',wxBITMAP_TYPE_ICO)
	self.tbi.SetIcon(icon, '')
        self.rhtmenu = wxMenu()
    	icon = wxBitmap(name = 'ffico.png', type = wxBITMAP_TYPE_PNG)
    	item = wxMenuItem(parentMenu = self.rhtmenu, id = wxID_FIREFOX,
text='Firefox')
    	item.SetBitmap(icon)
    	self.rhtmenu.Append(wxID_EXIT, "&Exit"," Terminate this program")
    	self.rhtmenu.Append(wxID_ABOUT, "&About"," Information about this
program")
    	self.rhtmenu.AppendSeparator()
    	self.rhtmenu.AppendItem(item)
        EVT_TASKBAR_RIGHT_UP(self.tbi, self.OnTrayRight)
        EVT_MENU(self, wxID_ABOUT, self.OnAbout)
        EVT_MENU(self, wxID_EXIT, self.OnExit)
        EVT_MENU(self, wxID_FIREFOX, self.OnLaunch)


appwin = wxPySimpleApp()
frame = MainWindow(None, -1, "Small editor")
appwin.MainLoop()



From "Kato Dakota" at yahoo.com  Sat Apr  9 15:45:02 2005
From: "Kato Dakota" at yahoo.com (Kato Dakota)
Date: Sat, 09 Apr 2005 19:45:02 GMT
Subject: THE GREATEST NEWS EVER ! =?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
 =?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
 =?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
 =?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
 =?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
 =?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
 =?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
 =?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
 =?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
 =?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60_?=
 =?iso-8859-1?q?=28newsgroup-post_127=29?=
In-Reply-To: <1113074212.618866.24620@f14g2000cwb.googlegroups.com>
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
	<1113074212.618866.24620@f14g2000cwb.googlegroups.com>
Message-ID: <2hW5e.31873$hU7.19808@newssvr33.news.prodigy.com>

Soy Bomb wrote:

> "The Holy Bible descibes Hell as a place of
> eternal torment, suffering, pain and agony
> for all those who have rejected Jesus Christ. "
> 
> Sounds like the USA 2005.
> 


Down in the Tsunami many nauts from here



hangin 250K
Tsunami Safaris
Surf City
Indian Ocean


From greg at invalid.invalid  Fri Apr  8 00:28:00 2005
From: greg at invalid.invalid (Greg Krohn)
Date: Fri, 08 Apr 2005 04:28:00 GMT
Subject: wxwindows event function arguments
In-Reply-To: <1112918150.576010.9940@f14g2000cwb.googlegroups.com>
References: <1112918150.576010.9940@f14g2000cwb.googlegroups.com>
Message-ID: <kLn5e.2526$An2.2019@newsread2.news.pas.earthlink.net>

lotmr wrote:
> I have a windows launch bar application that sits in the system tray.
> What I want to do is when i click on a button in the launch menu, it
> calls the event which then calls 'OnLaunch('path')' this does not seem
> possible. When I change 'OnLaunch(self, event)' to 'OnLaunch(self,
> event, path)' it says I dont have enough arguments. When I remove
> 'event', the OnLaunch runs as soon as the program loads. Using Google I
> can absolutly not find a way to pass arguments to a function called by
> a event. If indeed it is absolutly impossible, what could be the best
> alternate possibility?

One possible solution is to curry your event handler. This means that you
already supply the third argument (i.e. path) so that when wxWidgets
call the handler it only needs to supply the first two (i.e self and
event). If that's confusing see
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549 for more
info. So basically this is what you do. Put the following code before
your MainWindow class:

class curry:
     def __init__(self, fun, *args, **kwargs):
         self.fun = fun
         self.pending = args[:]
         self.kwargs = kwargs.copy()

     def __call__(self, *args, **kwargs):
         if kwargs and self.kwargs:
             kw = self.kwargs.copy()
             kw.update(kwargs)
         else:
             kw = kwargs or self.kwargs

         return self.fun(*(self.pending + args), **kw)

Then, when you bind your event, do it like this:

         EVT_MENU(self, wxID_FIREFOX, curry(self.OnLaunch, path='D:\Program Files\Mozilla Firefox\Firefox.exe'))

Then change your OnLaunch handler back to the way you originally wanted it:

     def OnLaunch (self, event, path):
         print event.GetString()
         os.startfile(path)


Hope this helps,
greg


From peter at engcorp.com  Tue Apr 19 09:27:38 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 19 Apr 2005 09:27:38 -0400
Subject: Why does python class have not private methods? Will this never
 changed?
In-Reply-To: <roy-1F0B84.08183019042005@reader1.panix.com>
References: <311b5ce105041902165a0969a0@mail.gmail.com>
	<mailman.2091.1113911481.1799.python-list@python.org>
	<roy-1F0B84.08183019042005@reader1.panix.com>
Message-ID: <ELednQVBIIDbmvjfRVn-1A@powergate.ca>

Roy Smith wrote:
>  Simon Brunning <simon.brunning at gmail.com> wrote:
>>On 4/19/05, could ildg <could.net at gmail.com> wrote:
>>>Private stuff always makes programming much easier.
>>
>>That contention is, at best, debatable. See
>>http://groups-beta.google.com/group/comp.lang.python/msg/b977ed1312e10b21.
> 
> Nice essay.  Now, for another look at the same issue...
> http://thedailywtf.com/forums/32534/ShowPost.aspx

Where in the original posting or in the 86 replies
in that massive page are we supposed to find something
pointed about this issue?

Also, do any of the people there use a language like
Python, or are you merely pointing to one example in
another language (Java) where, perhaps, "private"
should have been used?

Or does this actually back up Simon's point?  You
don't say and it's really unclear what your point is.

-Peter


From WLigtenberg at gmail.com  Fri Apr 22 13:25:08 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Fri, 22 Apr 2005 19:25:08 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
	<pan.2005.04.22.11.48.13.138980@gmail.com>
	<pan.2005.04.22.13.22.14.591804@gmail.com>
	<mailman.2282.1114177844.1799.python-list@python.org>
	<pan.2005.04.22.13.56.27.343483@gmail.com>
Message-ID: <pan.2005.04.22.17.25.06.536391@gmail.com>

Is there an easy way, to couple data together. Because I have discoverd an
irritating feature in the xml file.
Sometimes this is a database reference:
<Dbtag>
	<Dbtag_db>UCSC</Dbtag_db>
	<Dbtag_tag>
		<Object-id>
			<Object-id_str>1234</Object-id_str>
		</Object-id>
	</Dbtag_tag>
</Dbtag>

And sometimes:

<Dbtag>
	<Dbtag_db>UCSC</Dbtag_db>
	<Dbtag_tag>
		<Object-id>
			<Object-id_id>1234</Object-id_id>
		</Object-id>
	</Dbtag_tag>
</Dbtag>

So I get a list database names and two! lists of ID's
And those two are in no way related. Is there an easy way to create a
dictionary like this DBname --> ID
If not, I still might need to revert to SAX... :(

On Fri, 22 Apr 2005 15:56:29 +0200, Willem Ligtenberg wrote:

> As you can read in the other post of mine, my problem was with the
> iterating through the list. didn't know that you should do. e.text. I did
> only print e, not print e.text
> Did read documentation, but must admit not everything.
> 
> Anyway, thank you very much!
> 
> On Fri, 22 Apr 2005 15:47:08 +0200, Fredrik Lundh wrote:
> 
>> Willem Ligtenberg wrote:
>> 
>>> As I'm trying to write the code using cElementTree.
>>> I stumble across one problem. Sometimes there are multiple values to
>>> retrieve from one record for the same element. Like this:
>>> <Prot-ref_name_E>ATP-binding cassette, subfamily G, member 1</Prot-ref_name_E>
>>> <Prot-ref_name_E>ATP-binding cassette 8</Prot-ref_name_E>
>>> 
>>> How do you get not only the first, but the rest as well, so that I can
>>> store it in a list.
>> 
>> findall returns a list of matching elements.  if "elem" is the paretnt element,
>> this gives you a list of the text inside all Prot-ref_name_E child elements:
>> 
>>     [e.text for e in elem.findall("Prot-ref_name_E")]
>> 
>> (you have read the elementtree documentation, I hope?)
>> 
>> </F>



From mwm at mired.org  Mon Apr 25 23:57:13 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 22:57:13 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<pan.2005.04.26.00.01.53.726156@jerf.org>
Message-ID: <86ekcynqau.fsf@guru.mired.org>

Jeremy Bowers <jerf at jerf.org> writes:

> On Mon, 25 Apr 2005 23:26:56 +0000, John Bokma wrote:
>
>> Mike Meyer wrote:
>> 
>>> John Bokma <john at castleamber.com> writes:
>
> Nobody ever changed their mind as a result of a 20-thread endless
> reply-fest. As usual, the posters aren't about to admit anything, and none
> of the bystanders are reading any more.

Yeah, but I'm having fun. What's the point of usenet, if it's not fun?

      <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From asmundg at stud.cs.uit.no  Thu Apr  7 14:51:21 2005
From: asmundg at stud.cs.uit.no (=?ISO-8859-1?Q?=C5smund_Grammeltvedt?=)
Date: Thu, 7 Apr 2005 20:51:21 +0200 (CEST)
Subject: Ply(LALR) and Yacc behaving differently
Message-ID: <Pine.LNX.4.44.0504072012560.17835-100000@lgserv3.stud.cs.uit.no>

Hi.

I am trying to implement a small compiler in python and, trying to use 
something a bit more pythonic than lex/yacc, ended up with ply 
(http://systems.cs.uchicago.edu/ply/). The only problem is that whereas 
yacc accepts the grammar and appears to parse it correctly, ply does not.

Perhaps this belongs on some compiler list, but I couldn't decide if it 
was a compiler or a python problem, so bear with me.

This smaller grammar illustrates the problem:

Goal ::= (+|+-)*;


The yacc grammar goes:

%start Goal
%%

Goal
  : Block ';'
;

Block
  : Empty
  | Block T
  | Block S
;

Empty
  : /* empty */
;

S
  : '+'
;

T
  : '+' '-'
;


Translated to ply:

def p_Goal(p):
    """
    Goal : Block SEMI
    """

def p_Block(p):
  """
  Block : Empty
        | Block T
        | Block S
  """

def p_Empty(p):
    """
    Empty :
    """
    pass

def p_S(p):
    """
    S : PLUS
    """

def p_T(p):
    """
    T : PLUS MINUS
    """

Now, looking at the state machines that yacc and ply produces, the 
difference show up.

Yacc:

state 0
    0 $accept: . Goal $end

    $default  reduce using rule 5 (Empty)

    Goal   go to state 1
    Block  go to state 2
    Empty  go to state 3

state 2
    1 Goal: Block . ';'
    3 Block: Block . T
    4      | Block . S

    ';'  shift, and go to state 5
    '+'  shift, and go to state 6

    S  go to state 7
    T  go to state 8

state 3
    2 Block: Empty .

    $default  reduce using rule 2 (Block)


Ply:

state 0

    (0) S' -> . Goal
    (1) Goal -> . Block SEMI
    (2) Block -> . Empty
    (3) Block -> . Block T
    (4) Block -> . Block S
    (5) Empty -> .

    SEMI            reduce using rule 5 (Empty -> .)

    Empty                          shift and go to state 3
    Goal                           shift and go to state 2
    Block                          shift and go to state 1


OK, I believe those are the interesting parts. Appearently, ply doesn't
want to shift anything other than a ';' and thereby produces an error if
it encounters '+'. This only occurs in LALR mode, though. SLR handles
correctly, but my larger grammar isn't SLR, sigh.

So, any ideas? Have I completely messed up how to handle empty productions 
or should I switch to another lexer/parser?

-- 
?smund Grammeltvedt

All these moments will be lost in time, like tears in the rain.
http://electricsheep.org/



From kent37 at tds.net  Sat Apr 23 22:24:52 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 23 Apr 2005 22:24:52 -0400
Subject: Unicode problems, yet again
In-Reply-To: <d4eruk$gns$1@bagan.srce.hr>
References: <d4eruk$gns$1@bagan.srce.hr>
Message-ID: <426aff21$1_1@newspeer2.tds.net>

Ivan Voras wrote:
> I have a string fetched from database, in iso8859-2, with 8bit 
> characters, and I'm trying to send it over the network, via a socket:
> 
>   File "E:\Python24\lib\socket.py", line 249, in write
>     data = str(data) # XXX Should really reject non-string non-buffers
> UnicodeEncodeError: 'ascii' codec can't encode character u'\u0161' in 
> position 123: ordinal not in range(128)
> 
> The other end knows it should expect this encoding, so how to send it?

I think maybe the string from the database is a unicode string, not 8-bit. What happens if you write 
data.encode('iso8859-2') ?

> 
> (Does anyone else feel that python's unicode handling is, well... 
> suboptimal at least?)

It can be confusing and surprising, yes. Suboptimal...well, I wouldn't want to say that I could do 
better...

Kent


From max at alcyone.com  Fri Apr 15 19:49:53 2005
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 15 Apr 2005 16:49:53 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <A4WdnQQUzKq_zv3fRVn-jQ@speakeasy.net>

lucio.torre at gmail.com wrote:

> If anyone want to check this out, heres the url:
> http://pyar.decode.com.ar/Members/ltorre/PythonPalm

Note the links are swapped; the one that says source package points to 
the .prc file, and the one that says .prc file goes to the source package.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   There never was a good war or a bad peace.
   -- Benjamin Franklin


From Scott.Daniels at Acm.Org  Wed Apr  6 11:42:18 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 06 Apr 2005 08:42:18 -0700
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d2vhi8$k29$1@panix1.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com>
Message-ID: <4253fe0c$1@nntp0.pdx.net>

Aahz wrote:

> You just can't have your cake and eat it, too.

I've always wondered about this turn of phrase.  I seldom
eat a cake at one sitting.

-Scott David Daniels
Scott.Daniels at Acm.Org


From grante at visi.com  Thu Apr 21 11:29:17 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 21 Apr 2005 15:29:17 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
	<116fbo3pma1lsdb@corp.supernews.com> <d48eov$ddn$2@n6.co.ru>
	<116fg649v5rsf14@corp.supernews.com> <d48g6q$f66$1@n6.co.ru>
Message-ID: <116fhmd75m1a00a@corp.supernews.com>

On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:

>>>>> Well, I'm writing for embedded realtime systems in C/C++ and
>>>>> have never encountered a single need to use goto.
>>>> 
>>>> I have encountered situations in C programs where the best
>>>> thing to use was a goto.  Those situations have always been
>>>> handled beutifully by a "raise" in Python.
>>>
>>> setjmp/longjump?
>> 
>> I've always found setjmp/longjmp much more confusing and hard
>> to maintain than a simple goto.  It also requires library
>> support that goto doesn't.
>
> Agreed. The 'goto error' idiom is in fact the only goto usage
> I do agree with provided there is no support for exceptions,
> but that's not applicable to Python anyway.

Exactly.  I've been writing C code for 20+ years, and the only
problems where I found goto to be a good solution are the ones
where exceptions are even better solutions in Python.  I've
never found myself wishing for a goto when writing Python code.

-- 
Grant Edwards                   grante             Yow!  It's hard being
                                  at               an ARTIST!!
                               visi.com            


From davidf at sjsoft.com  Wed Apr 20 09:03:29 2005
From: davidf at sjsoft.com (David Fraser)
Date: Wed, 20 Apr 2005 15:03:29 +0200
Subject: Behaviour of str.split
In-Reply-To: <42662833.48350644@news.oz.net>
References: <4263cf31$0$26348$db0fefd9@news.zen.co.uk>
	<3cm7t9F6nuiooU1@individual.net> <d455dk$spi$1@ctb-nnrp2.saix.net>
	<42662833.48350644@news.oz.net>
Message-ID: <d45jv0$g67$1@ctb-nnrp2.saix.net>

Bengt Richter wrote:
> On Wed, 20 Apr 2005 10:55:18 +0200, David Fraser <davidf at sjsoft.com> wrote:
> 
> 
>>Greg Ewing wrote:
>>
>>>Will McGugan wrote:
>>>
>>>
>>>>Hi,
>>>>
>>>>I'm curious about the behaviour of the str.split() when applied to 
>>>>empty strings.
>>>>
>>>>"".split() returns an empty list, however..
>>>>
>>>>"".split("*") returns a list containing one empty string.
>>>
>>>
>>>Both of these make sense as limiting cases.
>>>
>>>Consider
>>>
>>> >>> "a b c".split()
>>>['a', 'b', 'c']
>>> >>> "a b".split()
>>>['a', 'b']
>>> >>> "a".split()
>>>['a']
>>> >>> "".split()
>>>[]
>>>
>>>and
>>>
>>> >>> "**".split("*")
>>>['', '', '']
>>> >>> "*".split("*")
>>>['', '']
>>> >>> "".split("*")
>>>['']
>>>
>>>The split() method is really doing two somewhat different things
>>>depending on whether it is given an argument, and the end-cases
>>>come out differently.
>>>
>>
>>You don't really explain *why* they make sense as limiting cases, as 
>>your examples are quite different.
>>
>>Consider
>>
>>>>>"a*b*c".split("*")
>>
>>['a', 'b', 'c']
>>
>>>>>"a*b".split("*")
>>
>>['a', 'b']
>>
>>>>>"a".split("*")
>>
>>['a']
>>
>>>>>"".split("*")
>>
>>['']
>>
>>Now how is this logical when compared with split() above?
> 
> 
> The trouble is that s.split(arg) and s.split() are two different functions.
> 
> The first is 1:1 and reversible like arg.join(s.split(arg))==s
> The second is not 1:1 nor reversible: '<<various whitespace>>'.join(s.split()) == s ?? Not usually.
> 
> I think you can do it with the equivalent whitespace regex, preserving the splitout whitespace
> substrings and ''.joining those back with the others, but not with split(). I.e.,
> 
>  >>> def splitjoin(s, splitter=None):
>  ...     return (splitter is None and '<<whitespace>>' or splitter).join(s.split(splitter))
>  ...
>  >>> splitjoin('a*b*c', '*')
>  'a*b*c'
>  >>> splitjoin('a*b', '*')
>  'a*b'
>  >>> splitjoin('a', '*')
>  'a'
>  >>> splitjoin('', '*')
>  ''
>  >>> splitjoin('a b    c')
>  'a<<whitespace>>b<<whitespace>>c'
>  >>> splitjoin('a b    ')
>  'a<<whitespace>>b'
>  >>> splitjoin('  b    ')
>  'b'
>  >>> splitjoin('')
>  ''
> 
>  >>> splitjoin('*****','*')
>  '*****'
> Note why that works:
> 
>  >>> '*****'.split('*')
>  ['', '', '', '', '', '']
>  >>> '*a'.split('*')
>  ['', 'a']
>  >>> 'a*'.split('*')
>  ['a', '']
> 
>  >>> splitjoin('*a','*')
>  '*a'
>  >>> splitjoin('a*','*')
>  'a*'

Thanks, this makes sense.
So ideally if we weren't dealing with backward compatibility these 
functions might have different names... "split" (with arg) and 
"spacesplit" (without arg)
In fact it would be nice to allow an argument to "spacesplit" specifying 
the characters regarded as 'space'
But all not worth breaking current code :-)

David


From mirnazim at gmail.com  Tue Apr 19 00:52:51 2005
From: mirnazim at gmail.com (Mir Nazim)
Date: 18 Apr 2005 21:52:51 -0700
Subject: (PHP or Python) Developing something like www.tribe.net
In-Reply-To: <F7KdnSD_t-AnU_7fRVn-qg@comcast.com>
References: <1113835147.364885.304290@l41g2000cwc.googlegroups.com>
	<F7KdnSD_t-AnU_7fRVn-qg@comcast.com>
Message-ID: <1113886371.590749.253780@g14g2000cwa.googlegroups.com>

I agree Zope2/Plone are really mature. But I think you missed my point.
It is not neccessary that I may be using all the functionality of Plone
etc. More over zope3 seems to have got a few great features like better
support for building filesystem based products, easier learning curve
etc.

Please take it in the light of what I want to do. Then may be someone
among c.l.py people may be able to suggest a way out.

PS: I have pointed out the problem to my employer but I want to present
a solution to it as well.



From bokr at oz.net  Thu Apr 21 05:54:27 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 21 Apr 2005 09:54:27 GMT
Subject: Python instances
References: <1113982340.156937.75530@f14g2000cwb.googlegroups.com>
	<d450ub$2kp$1@news.web.de>
	<1113983093.813565.23430@l41g2000cwc.googlegroups.com>
	<426647ea$1_3@newspeer2.tds.net>
Message-ID: <426776fa.134053138@news.oz.net>

On Wed, 20 Apr 2005 08:33:48 -0400, Kent Johnson <kent37 at tds.net> wrote:

>henrikpierrou at hotmail.com wrote:
>> Guess i shouldn't think of the __init__(self) function as a constructor
>> then.
>
>No, that's not it. You shouldn't think of variables defined outside of a method as instance variables.
>
>In Java for example you can write something like
>
>public class MyClass {
>     private List list = new ArrayList();
>
>     public void add(Object x) {
>         list.add(x);
>     }
>}
>
>In this case list is a member variable of MyClass instances; 'this' is implicit in Java.
>
>In Python, if you write something that looks similar, the meaning is different:
>
>class MyClass:
>     list = []
>
>     def add(self, x):
>         self.list.append(x)
>
>In this case, list is an attribute of the class. The Java equivalent is a static attribute. In 
>Python, instance attributes have to be explicitly specified using 'self'. So instance attributes 
>have to be bound in an instance method (where 'self' is available):
>
>class MyClass:
>     def __init__(self):
>         self.list = []
>
>     def add(self, x):
>         self.list.append(x)
>

The following shows nothing static anywhere, yet a class has been defined, an instance created, and
__init__ called with initial value, and the value retrieved as an attribute of the returned instance,
and it's all an expression.

 >>> type('C', (), {'__init__': lambda self,v:setattr(self,'foo',v)})('hello').foo
 'hello'

Regards,
Bengt Richter


From holovaty at gmail.com  Tue Apr 26 21:40:44 2005
From: holovaty at gmail.com (Adrian Holovaty)
Date: Tue, 26 Apr 2005 20:40:44 -0500
Subject: ANN: Greasemonkey compiler
Message-ID: <pan.2005.04.27.01.40.43.746463@gmail.com>

Greasemonkey (http://greasemonkey.mozdev.org/) is a Mozilla Firefox
extension that allows you to write scripts, in JavaScript, that alter
specific Web pages.

I've written a "compiler" for these scripts. It's a Python module that
takes a user script as input and creates a full-fledged Firefox extension.

This is useful if you're a script developer and want to distribute your
work to people without having to ask them to install Greasemonkey. It can
also be a helpful starting point if you want to write a more advanced
Firefox extension.

Python code (GPL):

http://www.letitblog.com/code/python/greasemonkey.py.txt

Web interface:

http://www.letitblog.com/greasemonkey-compiler/

Feel free to e-mail comments, bug fixes, etc.

Adrian Holovaty
----
holovaty at gmail.com
http://www.holovaty.com/


From jhargraveiii at msn.com  Mon Apr 25 00:21:41 2005
From: jhargraveiii at msn.com (Jim Hargrave)
Date: Mon, 25 Apr 2005 00:21:41 -0400
Subject: Utah Python Users Group
In-Reply-To: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>
References: <1113431196.131741.222500@l41g2000cwc.googlegroups.com>
Message-ID: <t6OdnSH1EZ3I7fHfRVn-rg@comcast.com>

I'm a Computational Linguist just starting with Python. I personally 
would be very interested in a UT Python group.

Jim

lugal wrote:
> Is anyone aware if there's a Utah-based Python User Group? If not, does
> any else from Utah have any interest in forming a Utah-based Python
> User Group?
> 


From kay.schluehr at gmx.net  Sat Apr  2 11:39:35 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 2 Apr 2005 08:39:35 -0800
Subject: Docorator Disected
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
Message-ID: <1112459975.790455.122900@z14g2000cwz.googlegroups.com>

Ron_Adam wrote:

> def decorator(d_arg):     # (7) Get 'Goodbye' off stack
>
>     def get_function(function): # (8) Get func object off stack
>
>         def wrapper(f_arg):        # (9) Get 'Hello' off stack
>
>             new_arg = f_arg+'-'+d_arg
>             result = function(new_arg)  # (10) Put new_arg on stack
>                                         # (11) Call func object
>
>             return result          # (14) Return result to wrapper
>
>         return wrapper        # (15) Return result to get_function
>
>     return get_function    # (16) Return result to caller of func
>
> @decorator('Goodbye')   # (5) Put 'Goodbye' on stack
>                         # (6) Do decorator
>
> def func(s):            # (12) Get new_arg off stack
>
>     return s            # (13) Return s to result

There is actually nothing mysterious about decorators. It is nothing
more than ordinary function composition, executed when the decorated
function is defined. In case of Your definition it, the composition
rules are:

decorator("Goodbye")(func)(s) = get_function(func)(s) = wrapper(s),
where wrapper stores "Goodbye" in the local d_arg.

Or a bit more formally we state the composition principle:

Args x Func -> Func, where decorator() is a function of Args, that
returns a function Func -> Func. As Guido had shown recently in his
Artima blog, Func need not be an instance of an ordinary function but
can be a function-object like his MultiMethod :

http://www.artima.com/weblogs/viewpost.jsp?thread=101605

It is also possible to extend this view by "chaining" decorators.

decorator : Args(2) x (Args(1) x Func - > Func ) -> Func.

To understand decorator chains it is very helpfull to accept the
functional view instead of arguing in a procedural picture i.e. pushing
and popping arguments onto and from the stack.

Someone asked once for a solution of the following problem that is
similar in character to Guidos multimethod but some more general.

def mul(m1,m2):
    def default(m1,m2):
        return "default",1+m1*m2
    def mul_dec(m1,m2):
        return "mul_dec",Decimal(str(m1))*Decimal(str(m2))
    def mul_float(m1,m2):
        return "mul_float",m1*m2
    return (default,mul_dec,mul_float)

The function mul defines the inner functions default, mul_float and
mul_dec. What we want is a unified access to this functions by means of
mul. Guidos solution would decompose mul in three different versions of
mul:

@multimethod(int,float)
def mul(m1,m2):
    return m1*m2

@multimethod(float,float)
def mul(m1,m2):
    return m1*m2


@multimethod(Decimal,Decimal)
def mul(m1,m2):
    return m1*m2

but it is hard to tell, what should be done if no argument tuple
matches.

An attempt like:

@multimethod(object,object)
def mul(m1,m2):
    return 1+m1*m2

would be useless, because there is no concrete match of argument types
onto (object,object).

So I introduced an "external switch" over argument tuples, using a
decorator chain:

@case(None,"default")
@case((float,float),'mul_float')
@case((int,float),'mul_float')
@case((Decimal,Decimal),'mul_dec')

def mul(m1,m2):
    def default(m1,m2):
        return "default",1+m1*m2
    def mul_dec(m1,m2):
        return "mul_dec",Decimal(str(m1))*Decimal(str(m2))
    def mul_float(m1,m2):
        return "mul_float",m1*m2
    return (default,mul_dec,mul_float)

Can You imagine how "case" works internally?

Regards,
Kay



From steve at holdenweb.com  Tue Apr 26 16:36:02 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 26 Apr 2005 16:36:02 -0400
Subject: Python documentation moronicities (continued)
In-Reply-To: <iK2dnRu0t_5S0PPfRVn-iQ@powergate.ca>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>	<mailman.1813.1113355346.1799.python-list@python.org>	<1114454884.549187.122440@o13g2000cwo.googlegroups.com>	<d4jec2$20g$1@sea.gmane.org>	<mailman.2485.1114456610.1799.python-list@python.org>	<1114477978.067147.293900@z14g2000cwz.googlegroups.com>	<mailman.2503.1114488322.1799.python-list@python.org>
	<iK2dnRu0t_5S0PPfRVn-iQ@powergate.ca>
Message-ID: <d4m8de$khb$1@sea.gmane.org>

Peter Hansen wrote:
> Steve Holden wrote:
> 
>> I still await the specified five emails preferring your version to the 
>> current documentation.
> 
> 
> So, for the record Steve, how many of those emails have you
> received to date?  (And how many from *anyone*, not just
> regulars, proclaiming Xah's version better?)
> 
> -Peter

That would be none, Peter, as of right now.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fredrik at pythonware.com  Thu Apr 14 12:31:05 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 14 Apr 2005 18:31:05 +0200
Subject: A little request about spam
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com><t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com><740c3aec05041405157cb90625@mail.gmail.com><d3fd6366050414054728665d7e@mail.gmail.com><7ee3dcd80504140551385ce25e@mail.gmail.com><d3fd636605041405592212edf8@mail.gmail.com><e724b24405041407021decd1c4@mail.gmail.com>
	<797fe3d405041408506aab4d13@mail.gmail.com>
Message-ID: <d3m5li$md8$1@sea.gmane.org>

Bill Mill wrote:

> > Maybe we should contact the gmail admins?
>
> I've already contacted the gmail admins. There was no response.

have you tried reading the newsgroup via

    http://groups-beta.google.com/group/comp.lang.python

while being logged in to your gmail account?

</F>





From bokr at oz.net  Tue Apr 19 00:50:24 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 04:50:24 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
	<Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>
	<4261c943.136032804@news.oz.net> <3cf2qfF6jo33oU1@individual.net>
	<4262c4b2.200399789@news.oz.net> <3che4dF6o7el3U1@individual.net>
Message-ID: <42647e0d.313386275@news.oz.net>

On Mon, 18 Apr 2005 12:50:24 +0200, Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:

>Bengt Richter wrote:
>> On Sun, 17 Apr 2005 15:25:04 +0200, Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:
>
>>>> Note that there is no problem adding other parameters, because ::<suite> is just
>>>> a unary expression returning dict subtype instance, e.g.,
>>>> 
>>>>     y = f(11,22,**::
>>>>            x = 1
>>>>            y = 'y for f'
>>>>         )*g(*args_from_somewhere, **::
>>>>            x = 'x for g'
>>>>            y = 'y for g'
>>>>            def foo(): return 'foo for g'
>>>>         )
>>>
>>>You know that this is dead ugly?
>> What aspect in particular?
>
>The '**::', for example. I would surely prefer a keyword instead of '::'.

I thought it was concise and mnemonic, in that ':' already introduces suites, and '::'
introduces exactly the same thing, only processing it differently, which is suggested
concisely by '::' being different from ':' ;-)

>
>> I.e., does this (currently legal) look prettier:
>> 
>>        y = f(11,22, **dict(
>>               x = 1,
>>               y = 'y for f'
>>            ))*g(*args_from_somewhere, **dict(
>>               x = 'x for g',
>>               y = 'y for g',
>>               foo = lambda: return 'foo for g'
>>            ))
>
>No, it doesn't. And I surely wouldn't write such code.
>
>y = (f(11, 22, x=1, y='y for f') *
>     g(*args_from_somewhere, x='x for g', y='y for g', foo=lambda: return 'foo for g'))
>
>or, if you tolerate more lines,
>
>y = (f(11, 22, x=1, y='y for f') *
>     g(*args_from_somewhere,
>       x='x for g', y='y for g',
>       foo=lambda: return 'foo for g'))
>
>would be my current way to express this. But still, the less lines,
>the less confusing it is.
>
Chacun a son gout ;-)

>> Can you express the same semantics in a prettier way?
>> 
>> To boil it down, doesn't a suite bindings expression like
>> 
>>       d = ::
>>           x = 1
>>           y = 'y for f'    
>> 
>> (which in this case doesn't even need parens) seem prettier than
>> 
>>       d = dict(
>>           x = 1,
>>           y = 'y for f'
>>       )
>> 
>> to you, especially given that (:: ...) gives you the power
>> of full suite syntax to create bindings
>> any way you want[1], not just keyword=<expression> ?
>> (and you can leave out the commas ;-)
>
>I understand the general idea, but still I don't like the idea of "suite expressions".
>My main concern is the following: After a suite expression, where does code
>follow?
>
>As in your example:
>
>y = f(**::
>       x = 1   # indented one level, as indents can go any number of spaces
>     )         # indented one level too, but differently (currently an IndentantionError)
I don't understand your example. Think of it as a triple quoted string, except that it opens
with :: and doesn't require \ to ignore the first blank line, and it closes with dedent or
a closing bracket that was not opened in the "string".
That closing paren doesn't belong to the :: suite (having been opened outside the suite).
Therefore, no matter where it appears, it will end the suite, and play its own role in
matching its partner (right after f here).

If you parenthesize you are fully free to indent your first line anywhere, e.g. (perversely)
y = f(**(:: # note paren
x = 1
       ) # blank line with 7 spaces ends the suite
         # you can't get left of the reference indentation here, so it's
         # good that ')' ends the suite ;-)
) # closes f( -- legal at any indentation, since we're inside an open bracket

If you don't parenthesize, your suite will end where a normal if x: suite would end by dedent
Note that
    if x:
  z=2
is a syntax error, and you would expect the same with
    x = ::
  z = 2
if :: required something on the next line, but unlike an if with no inline suite, :: doesn't require it,
and just sees that z is at or left of the existing indentation of x, so the z is a dedent ending a blank suite,
and z better line up with something, as in

  if x:
    x = :: # blank suite
  z = 2
 
So you can write
  d1 = ::
    x = 1
  d2 = :: x=2
  d2 = ::
      def foo(): pass

and expect what you'd expect if you were me ;-)
 

BTW, surrounding brackets such as f(...) do not do away with the indentation rules 
_within a_ :: suite, they just let you start it where you want.

>
>> [1] I.e., this should work to extend the power of the type expression in a way
>> that shows what you can't do with dict(...) ;-)
>> 
>>      type('C', (), ::
>>          def __repr__(self):
>>              return '<alternatively-created-class-object at %08x>'% (hex(id(self)&(2L**32-1))
>>          def cname(self): return type(self).__name__
>>          classvar = 123
>>          # ... anything you can do in a class definition body
>>      )
>> 
>> IMO that's pretty clean.
>
>Uses are neat, i concur.
Maybe I can win you over ;-)

>
>>>The real ``problem'' (if you see one) is that the indentation syntax
>>>doesn't allow for suites in expressions.
>> 
>> I was trying to solve that "problem" with my "suite expressions" ;-)
>> 
>>    ::<suite>                  # suite bindings expression (as ordered dict)
>>    def(<arglist>):<suite>     # anonymous def
>>    (<arglist>):<suite>        # thunk (anonymous callable suite sharing local namespace)
>> 
>> I think suite indentation rules for suite expressions are not that hard, once you decide
>> to deal with it as a separate indentation space from outside the expression. That's already
>> done to allow multiline expressions without indentation interpretation inside bracketed expressions.
>> This is just adding indentation processing within certain types of expressions ("suite expressions" ;-)
>> 
>> For the most part I like indentation syntax very well, and
>> I suspect that if there were optional brackets, you would still be indenting
>> for clarity, so the chances are the bracket version of the above would
>> mainly add bracket noise to something close to the above.
>
>I don't say brackets are better, but the problem of where to put the following code
>is tricky.
Why is it more tricky than the suite of if x: ?
And when can't you easily resolve a doubt with explicit parens?

Regards,
Bengt Richter


From bill.mill at gmail.com  Wed Apr 13 09:11:22 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Wed, 13 Apr 2005 09:11:22 -0400
Subject: preallocate list
In-Reply-To: <d3j4ds$njr$1@scotsman.ed.ac.uk>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk>
Message-ID: <797fe3d40504130611dbf2ffe@mail.gmail.com>

On 4/13/05, Jim <jbo at cannedham.ee.ed.ac.uk> wrote:
> Hi all
> 
> Is this the best way to preallocate a list of integers?
> listName = range(0,length)
> 

the 0 is unnecessary; range(length) does the same thing.

> What about non integers?
> 

arr = [myobject() for i in range(length)]

> I've just claimed in the newsgroup above that pre-allocating helps but I
> might be getting confused with matlab ;)
> 
> If I have a file with a floating point number on each line, what is the
> best way of reading them into a list (or other ordered structure)?
> 
> I was iterating with readline and appending to a list but it is taking ages.
> 

I would profile your app to see that it's your append which is taking
ages, but to preallocate a list of strings would look like:

["This is an average length string" for i in range(approx_length)]

My guess is that it won't help to preallocate, but time it and let us
know. A test to back my guess:

import timeit, math

def test1():
    lst = [0 for i in range(100000)]
    for i in xrange(100000):
        lst[i] = math.sin(i) * i

def test2():
    lst = []
    for i in xrange(100000):
        lst.append(math.sin(i) * i)

t1 = timeit.Timer('test1()', 'from __main__ import test1')
t2 = timeit.Timer('test2()', 'from __main__ import test2')
print "time1: %f" % t1.timeit(100)
print "time2: %f" % t2.timeit(100)

09:09 AM ~$ python test.py
time1: 12.435000
time2: 12.385000

Peace
Bill Mill
bill.mill at gmail.com


From nick at craig-wood.com  Sun Apr  3 14:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 03 Apr 2005 18:30:02 GMT
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
	<slrnd47i1t.20i.apardon@rcpc42.vub.ac.be>
	<7xmzsshzxr.fsf@ruckus.brouhaha.com>
	<slrnd47m3b.20i.apardon@rcpc42.vub.ac.be>
	<7x8y4cyr70.fsf@ruckus.brouhaha.com>
	<slrnd47qs7.20i.apardon@rcpc42.vub.ac.be>
	<7xoed86lnd.fsf@ruckus.brouhaha.com>
	<slrnd47t2s.20i.apardon@rcpc42.vub.ac.be>
	<7xfyyjcu5w.fsf@ruckus.brouhaha.com>
	<slrnd4idbu.20i.apardon@rcpc42.vub.ac.be>
	<7xsm2e7kg7.fsf@ruckus.brouhaha.com>
	<slrnd4igas.20i.apardon@rcpc42.vub.ac.be>
	<7xvf7aws6c.fsf@ruckus.brouhaha.com>
	<slrnd4ijtf.20i.apardon@rcpc42.vub.ac.be>
	<7xvf79ehf9.fsf@ruckus.brouhaha.com>
	<slrnd4kq5v.20i.apardon@rcpc42.vub.ac.be>
	<7xhditlckv.fsf@ruckus.brouhaha.com>
	<slrnd4rbep.l2j.nick@irishsea.home.craig-wood.com>
	<7x1x9t1xs2.fsf@ruckus.brouhaha.com>
Message-ID: <slrnd50c1s.etq.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
>  Nick Craig-Wood <nick at craig-wood.com> writes:
> > I believe futex is the thing you want for a modern linux.  Not
> > very portable though.
> 
>  That's really cool, but I don't see how it can be a pure userspace
>  operation if the futex has a timeout.  The kernel must need to keep
>  track of the timeouts.  However, since futexes can be woken by any
>  thread, the whole thing can be done with just one futex.  In fact the
>  doc mentions something about using a file descriptor to support
>  asynchronous wakeups, but it's confusing whether that applies here.

No it isn't pure user space, only for the non-contended case which for
most locks is the most frequent operation.

       Futex operation is entirely userspace for the non-contended
       case.  The kernel is only involved to arbitrate the contended
       case. As any sane design will strive for non-contension,
       futexes are also optimised for this situation.

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


From listspam at flowtheory.net  Sun Apr 10 16:32:31 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Sun, 10 Apr 2005 14:32:31 -0600
Subject: Https Form Page
In-Reply-To: <764176c10504082304cc6f3fa@mail.gmail.com>
References: <764176c10504081313501b1e1f@mail.gmail.com>
	<87b1fe089f338ada9e53838fd1f7d90e@flowtheory.net>
	<764176c105040815512969ae22@mail.gmail.com>
	<259dbf1b66d0acb9df2e992507914428@flowtheory.net>
	<764176c10504082304cc6f3fa@mail.gmail.com>
Message-ID: <67bc2d0f20e019b44f585ed1102180a8@flowtheory.net>

It all really, really, really depends on your script processing the 
form. My suggestion is to use the openssl s_client program, manually 
submit your data, and see what your server is responding with.

-jag

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 9, 2005, at 12:04 AM, Hasan D wrote:

>  I cant figure out, always gives me the form page. Everything looks ok 
> but ?
>
>
> On Apr 9, 2005 2:07 AM, Joshua Ginsberg <listspam at flowtheory.net> 
> wrote:
>> If url is your formpage and your formdata is correct, it should work.
>>
>> Do you need to have a cookie set? Is it 304 redirecting you?
>>
>> -jag
>>
>>
>>
>> Joshua Ginsberg -- joshg at brainstorminternet.net
>> Brainstorm Internet Network Operations
>> 970-247-1442 x131
>> On Apr 8, 2005, at 4:51 PM, Hasan D wrote:
>>
>>> Thank you for fast reply.
>>> Your program works fine. But when i print the https_response it gives
>>> me the form page. I want to send the form and print the result page.
>>>
>>>
>>>
>>> On Apr 9, 2005 12:19 AM, Joshua Ginsberg <listspam at flowtheory.net>
>>> wrote:
>>>> Try:
>>>>
>>>> import urllib2, urllib
>>>> formdata = urllib.urlencode({'a':1,'b':2})
>>>> request = urllib2.Request(url)
>>>> request.add_data(formdata)
>>>> opener = urllib2.build_opener(urllib2.HTTPSHandler())
>>>> urllib2.install_opener(opener)
>>>> fs = urllib2.urlopen(request)
>>>> https_response = fs.read()
>>>> https_headers = fs.info().headers
>>>> https_mimetype = fs.info().type
>>>>
>>>> -jag
>>>>
>>>>
>>>>
>>>> Joshua Ginsberg -- joshg at brainstorminternet.net
>>>> Brainstorm Internet Network Operations
>>>> 970-247-1442 x131
>>>> On Apr 8, 2005, at 2:13 PM, Hasan D wrote:
>>>>
>>>>> I'm new on this httplib and urllib. Actually I dont know what 
>>>>> should
>>>>> i
>>>>> use.
>>>>>
>>>>> I want to fill the form in a "https" page , and return the result 
>>>>> . I
>>>>> write a test code but always gives errors. I cant find any good
>>>>> example about this on the net. What should I do about this ?
>>>>>
>>>>>
>>>>> import urlparse,urllib,httplib,string,htmllib,formatter
>>>>>
>>>>> #port="443"
>>>>> target="https://www.abc.com/"
>>>>> params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
>>>>> http=httplib.HTTP("https://www.abc.com/",443)
>>>>>
>>>>> data='Name=x&Adress=x'
>>>>> headers = {"Content-type":
>>>>> "application/x-www-form-urlencoded","Accept": "text/plain"}
>>>>>
>>>>> print "Sending Data On "+target+"...\n"
>>>>> http.putrequest("POST",target+"/xxx.asp?q=7&b=11",params)
>>>>>
>>>>> response = http.getresponse()
>>>>> print response.status, response.reason
>>>>>
>>>>> http.send(data)
>>>>>
>>>>> code,msg,headers = http.getreply()
>>>>>
>>>>> print "HTTP Code : ",str(code)
>>>>> print "HTTP Connection : ",msg
>>>>> print "HTTP headers : \n",headers,"\n"
>>>>>
>>>>> HTML=http.getfile().read()
>>>>> MyParser=htmllib.HTMLParser(formatter.NullFormatter())
>>>>> MyParser.feed(HTML)
>>>>> # Print all the anchors from the results page
>>>>> print MyParser.anchorlist
>>>>> --
>>>>> http://mail.python.org/mailman/listinfo/python-list
>>>>>
>>>>
>>>>
>>>> --
>>>> http://mail.python.org/mailman/listinfo/python-list
>>>>
>>>>
>>>>
>>>
>>
>>
>>
>>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>

From timr at probo.com  Thu Apr 14 01:38:57 2005
From: timr at probo.com (Tim Roberts)
Date: Wed, 13 Apr 2005 22:38:57 -0700
Subject: Global Variables
References: <425ca975$1@dnews.tpgi.com.au>
Message-ID: <cc0s51h3vkkdrsboqkd3li2f2p5epip0ab@4ax.com>

"Bob Then" <Bob_then at yahoo.com.au> wrote:

>If I have a module File
>which has some fucontions but I need  globals filename and path how can I
>set them so I can change them because I tryed.
>
>filename="log.txt"
>path="/home/Bob/"
>
>def change_filename():
    global filename
>   filename=raw_input()
>
>def change_path():
    global path
>   path=raw_input()
>
>they don't change and without the declarations there not global.

However, the reason that must be stated explicitly is because it's a bad
practice.  It means that your function has "side effects" beyond just
returning a value or set of values.  This kind of thing is a better
solution:

def change_filename():
    return raw_input()

def change_path()
    return raw_input()

filename = change_filename()
path = change_path()
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From bill.mill at gmail.com  Mon Apr  4 15:23:08 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Mon, 4 Apr 2005 15:23:08 -0400
Subject: How to reload local namespace definitions in the python
	interpreter?
In-Reply-To: <d2rl92$i62$1@sea.gmane.org>
References: <1112435996.697236.231800@l41g2000cwc.googlegroups.com>
	<3b7an1F6gf5b4U1@individual.net> <d2rl92$i62$1@sea.gmane.org>
Message-ID: <797fe3d4050404122377c77588@mail.gmail.com>

On Apr 4, 2005 11:10 AM, Steve Holden <steve at holdenweb.com> wrote:
> Tim Jarman wrote:
> > test1dellboy3 at yahoo.co.uk wrote:
> >
> >
> >>Hi,
> >>
> >>I am a beginner using the python interpreter. To reduce typing effort,
> >>I created a module called "aliases.py" containing some aliases for
> >>objects I commonly use like -
> >>
> >>aliases.py :
> >>
> >>
> >>import filecmp, os, commands
> >>
> >>op = os.path
<snip>
> > By the way, are you aware of the import ... as ... idiom?
> > e.g. import os.path as op
> >
> 
> This would, of course, require the user to qualify the names by
> prefixing them with "op.".
> 

What the OP listed above requires that too.

Peace
Bill Mill
bill.mill at gmail.com


From reinhold-birkenfeld-nospam at wolke7.net  Tue Apr 12 04:04:10 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Tue, 12 Apr 2005 10:04:10 +0200
Subject: singleton objects with decorators
In-Reply-To: <d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
Message-ID: <3c1dltF6m5d2rU1@individual.net>

Uwe Mayer wrote:
> Tuesday 12 April 2005 06:36 am Steven Bethard wrote:
>> Uwe Mayer wrote:
>>> I've been looking into ways of creating singleton objects.
>> 
>> It strikes me that I've never wanted or needed a singleton object.
>> Would you mind sharing your use case?  I'm just curious.
> 
> I am using a class to manage configuration settings in an application. This
> object should only existe once so that when the user
> changes a setting through a configuration dialog the change imminent in all
> locations where access to config settings are needed.

In this case, you may want to read

http://www.aleax.it/5ep.html


Gr??e
Reinhold


From fredrik at pythonware.com  Tue Apr 19 08:52:43 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 19 Apr 2005 14:52:43 +0200
Subject: xmlrpclib and binary data as normal parameter strings
References: <svlacnvhrov.fsf@dresden.uio.no>
Message-ID: <d42un1$phh$1@sea.gmane.org>

Rune Froysa wrote:
> >From http://www.w3.org/TR/2004/REC-xml11-20040204/#dt-character ::
>   Consequently, XML processors MUST accept any character in the range
>   specified for Char
>   ...
>   Char  ::=  [#x1-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]

you're looking at the XML 1.1 specification.   don't do that.  nobody uses 1.1.

here's the 1.0 version:

    http://www.w3.org/TR/REC-xml/#dt-character

    Char   ::=   #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]

</F> 





From __peter__ at web.de  Sun Apr  3 04:15:17 2005
From: __peter__ at web.de (Peter Otten)
Date: Sun, 03 Apr 2005 10:15:17 +0200
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com>
	<mailman.1184.1112365039.1799.python-list@python.org>
Message-ID: <d2o8mm$ncp$01$1@news.t-online.com>

jfj wrote:

>> To make it a bit clearer, a StopIteration raised in a generator
>> expression silently terminates that generator:
> 
> *any* exception raised from a generator, terminates the generator

Yeah, but StopIteration is the only expected exception and therefore the
only one that client code (nearly) always knows to deal with:

>>> def choke(): raise ValueError
...
>>> list(i for i in range(10) if i < 3 or choke())
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 1, in <generator expression>
  File "<stdin>", line 1, in choke
ValueError
>>> [i for i in range(10) if i < 3 or choke()]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 1, in choke
ValueError

Here you can *not* tell apart list(genexp) and listcomp.

(Of course, as has since been pointed out, the StopIteration is actually
caught in the list constructor, so nothing magic to the example in my
initial post)

Peter



From ville at spammers.com  Thu Apr 14 02:24:54 2005
From: ville at spammers.com (Ville Vainio)
Date: 14 Apr 2005 09:24:54 +0300
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<1113422698.396417.45280@l41g2000cwc.googlegroups.com>
Message-ID: <du7ll7lg9jd.fsf@lehtori.cc.tut.fi>

>>>>> "zsolt" == pythonUser 07 <zsolt-googleP6463 at mailblocks.com> writes:

    zsolt> Python is great, but having much "admin" type experience,
    zsolt> I've found python to be less than Ideal when dealing with
    zsolt> system calls and standard Input Ouput.

Have you tried the 'subprocess' module to see whether it solves your
problems, new in 2.4?

That said, I've never had the problems you describe with normal popen*
calls either.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From apardon at forel.vub.ac.be  Thu Apr 21 03:01:02 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 07:01:02 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
Message-ID: <slrnd6ejte.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Peter Hansen schreef <peter at engcorp.com>:
> Terry Hancock wrote:
>> However, I used to make "off by one" errors all the time in both C and Fortran,
>> whereas I hardly ever make them in Python.
>
> This should probably be the overriding concern in this
> case.
>
> I can't remember the last time I made an off-by-one error
> in Python (or, really, whether I ever have), whereas I
> can't remember the last C program I wrote which didn't have
> one.

I do so frequently.

I often have to process files where each line is a record,
each record having a number of fields seperated with a
delimiter.

So the idiom for treating such files has become

  for line in the_file:
    lst = line.split(delimiter)

The problem is that the fields in lst are associated
with a number that is off by one as they are normally
counted. If I go and ask my colleague which field
contains some specific data and he answers:
the 5th, I have to remind my self I want lst[4]

This is often a cause for errors.

-- 
Antoon Pardon


From peter at engcorp.com  Sun Apr 17 16:59:19 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 17 Apr 2005 16:59:19 -0400
Subject: Problem with unpack hex to decimal
In-Reply-To: <d3ueer$avn$1$8302bc10@news.demon.co.uk>
References: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>
	<d3ueer$avn$1$8302bc10@news.demon.co.uk>
Message-ID: <te-dnT0lMfStU__fRVn-rQ@powergate.ca>

Jonathan Brady wrote:
> ... I also find the following confusing:
>>>>struct.calcsize('hb')
> 3
> 
>>>>struct.calcsize('hb') == struct.calcsize('bh')
> False
> 
> I could understand aligning to multiples of 4, but why is 'hb' different 
> from 'bh'? 

Pad bytes have never been, as far as I know, added
at the end of structs in C, only between fields, when
required.  So the leading "b" gets a following pad
byte, but the trailing one doesn't need padding.

-Peter


From rune.strand at gmail.com  Wed Apr 13 21:52:16 2005
From: rune.strand at gmail.com (runes)
Date: 13 Apr 2005 18:52:16 -0700
Subject: Python documentation moronicities (continued)
In-Reply-To: <mailman.1827.1113391383.1799.python-list@python.org>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<1113346139.139720.17510@o13g2000cwo.googlegroups.com>
	<mailman.1819.1113380033.1799.python-list@python.org>
	<1113388891.512839.111250@f14g2000cwb.googlegroups.com>
	<mailman.1827.1113391383.1799.python-list@python.org>
Message-ID: <1113443536.428399.33790@f14g2000cwb.googlegroups.com>

Steve, thank you for givig me those links. I'll go there if I manage to
structure an improvement suggestion.

And about the link to the Howto: I suppose many people don't read the
manual from a to z but with a particular problem in mind. Hence the
link could ble locateded several places, perhaps referencing to an
exact and relevant section of the Howto.

Rune



From deetsNOSPAM at web.de  Wed Apr  6 15:22:31 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 06 Apr 2005 21:22:31 +0200
Subject: Python sleep doesn't work right in a loop?
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>
Message-ID: <d31ctj$jp9$02$1@news.t-online.com>

ritterhaus at yahoo.com wrote:

> Just a simple bit of code to toggle between two state at intervals...
> 
> import time
> for i in range(4):
>     print 'On'
>     time.sleep(1)
>     print 'Off'
>     time.sleep(1)
> 
> ... SHOULD toggle On and Off four times with one-second pauses. When I
> run this, the loop pauses the full eight seconds then prints the Ons
> and Offs all at once. What's up with that?

Works for me - on a terminal using linux. BUT what not works is this:

python /tmp/test.py | cat

(test.py contains your code of course) The reason is buffered pipes being
used. Try this:

import time, sys
for i in range(4):
    print 'On'
    sys.stdout.flush()
    time.sleep(1)
    print 'Off'
    sys.stdout.flush()    
    time.sleep(1)

-- 
Regards,

Diez B. Roggisch


From onurb at xiludom.gro  Fri Apr 15 09:17:04 2005
From: onurb at xiludom.gro (bruno modulix)
Date: Fri, 15 Apr 2005 15:17:04 +0200
Subject: Is Python appropriate for web applications?
In-Reply-To: <op.so85a1bgr3xrds@sony>
References: <op.so85a1bgr3xrds@sony>
Message-ID: <425fbed1$0$10366$636a15ce@news.free.fr>

Unknown User wrote:
> I am a Python programmer and I'm thinking about learning PHP, which is  
> similar to C++ (quite
> different from Python). I want to start writing web applications. Do 
> you  think if I learn
> PHP I'll develop faster? Does PHP have more features? How about the 
> speed  of execution? What
> are the pros and cons? Our server can run both Python, Perl and PHP, so 
> I  have the choice.
> Thanks for your opinion,

<rant topic="php">
I loosed 2 hours this morning debugging PHP code. There were 2 problems.

The first one was a typo in the name of a variable ($actegories instead 
of $categories). Instead of raising an exception, this b**d "programming 
language" (err...) just created a new variable with a NULL value. Doh :-(

The second one was about array concatenation/union. I had used the "+" 
operator instead of the array_merge() function.

Read the PHP doc about the "+" operators for arrays and the 
array_merge() function (don't forget that PHP uses the same construct 
for arrays and mappings - doh). Then imagine yourself programming PHP, 
and ask yourself if you'll really develop faster with such a braindead 
quick&dirty hack for language.
</rant>

PHP-is-VB-for-the-web-ly'yrs
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for 
p in 'onurb at xiludom.gro'.split('@')])"


From db3l at fitlinxx.com  Fri Apr  1 18:05:42 2005
From: db3l at fitlinxx.com (David Bolen)
Date: 01 Apr 2005 18:05:42 -0500
Subject: Queue.Queue-like class without the busy-wait
References: <1111707620.556818.289300@g14g2000cwa.googlegroups.com>
Message-ID: <uu0mqm721.fsf@fitlinxx.com>

"Paul L. Du Bois" <polytope at gmail.com> writes:

> Has anyone written a Queue.Queue replacement that avoids busy-waiting?
> It doesn't matter if it uses os-specific APIs (eg
> WaitForMultipleObjects).  I did some googling around and haven't found
> anything so far.

This isn't a Queue.Queue replacement, but it implements a buffer
intended for inter-thread transmission, so it could be adjusted to
mimic Queue semantics fairly easily.  In fact, internally it actually
keeps write chunks in a list until read for better performance, so
just removing the coalesce process would be the first step.

It was written specifically to minimize latency (which is a
significant issue with the polling loop in the normal Python Queue
implementation) and CPU usage in support of a higher level
Win32-specific serial I/O class, so it uses Win32 events to handle the
signaling for the key events when waiting.

The fundamental issue with the native Python lock is that to be
minimalistic in what it requires from each OS, it doesn't impose a
model of being able to wait on an event signal - that's the key thing
you need to have (a timed blocking wait on some signalable construct)
to be most efficient for these operations - which is what I use the
Win32 Event for.

-- David

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

import thread
import win32event as we

class Buffer:
    """A thread safe unidirectional data buffer used to represent data
    traveling to or from the application and serial port handling threads.

    This class is used as an underlying implementation mechanism by SerialIO.
    Application code should not typically need to access this directly, but
    can handle I/O through SerialIO.

    Note that we use Windows event objects rather than Python's because
    Python's OS-independent versions are not very efficient with timed waits,
    imposing internal latencies and CPU usage due to looping around a basic
    non-blocking construct.  We also use the lower layer thread lock rather
    than threading's to minimize overhead.
    """

    def __init__(self, notify=None):
        self.lock = thread.allocate_lock()
        self.has_data = we.CreateEvent(None,1,0,None)
        self.clear()
        self.notify = notify

    def _coalesce(self):
        if self.buflist:
            self.buffer += ''.join(self.buflist)
            self.buflist = []

    def __len__(self):
        self.lock.acquire()
        self._coalesce()
        result = len(self.buffer)
        self.lock.release()
        return result

    def clear(self):
        self.lock.acquire()
        self.buffer = ''
        self.buflist = []
        self.lock.release()

    def get(self, size=0, timeout=None):
        """Retrieve data from the buffer, up to 'size' bytes (unlimited if
        0), but potentially less based on what is available.  If no
        data is currently available, it will wait up to 'timeout' seconds
        (forever if None, no blocking if 0) for some data to arrive"""

        self.lock.acquire()
        self._coalesce()

        if not self.buffer:
            # Nothing buffered, wait until something shows up (timeout
            # rules match that of threading.Event)
            self.lock.release()
            if timeout is None:
                win_timeout = we.INFINITE
            else:
                win_timeout = int(timeout * 1000)
            rc = we.WaitForSingleObject(self.has_data, win_timeout)
            self.lock.acquire()
            self._coalesce()
        
        if not size:
            size = len(self.buffer)
            
        result_len = min(size,len(self.buffer))
        result = self.buffer[:result_len]
        self.buffer = self.buffer[result_len:]
        we.ResetEvent(self.has_data)
        self.lock.release()
        return result

    def put_back(self,data):
        self.lock.acquire()
        self.buffer = data + self.buffer
        self.lock.release()
        we.SetEvent(self.has_data)
        if self.notify:
            self.notify()

    def put(self, data):
        self.lock.acquire()
        self.buflist.append(data)
        self.lock.release()
        we.SetEvent(self.has_data)
        if self.notify:
            self.notify()


From codecraig at gmail.com  Thu Apr 21 13:06:46 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 10:06:46 -0700
Subject: python classes/file structure
In-Reply-To: <mailman.2229.1114097050.1799.python-list@python.org>
References: <1114091324.679130.294190@g14g2000cwa.googlegroups.com>
	<mailman.2229.1114097050.1799.python-list@python.org>
Message-ID: <1114103206.925440.218520@l41g2000cwc.googlegroups.com>

Thanks, but I am not familiar with the "__all__" variable, could u give
me an example?

Without using, __all__....would i do this in my __init__.py?

import MyCustomWidget1
import MyCustomWidget2
import MyCustomWidget3

etc?



From prabapython at yahoo.co.in  Sat Apr  9 05:32:26 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Sat, 9 Apr 2005 10:32:26 +0100 (BST)
Subject: How to check whether a  list have specific value exist or not?
In-Reply-To: 6667
Message-ID: <20050409093226.96954.qmail@web8402.mail.in.yahoo.com>

Dear All
     In Php we can find in_array() function
which function is mainly useful to check
whether a specific value is exist in the array
or not.

   But In python In cannot find any function
like that.  I want to check a list have specific
value or not. So If any one know regarding this
mail me

with regards
PRabahar


________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From peter at engcorp.com  Tue Apr  5 09:20:40 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 09:20:40 -0400
Subject: check interpreter version before running script
In-Reply-To: <d2u1v8$n8t$1@solaris.cc.vt.edu>
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
Message-ID: <F6idnRGbaJ01Dc_fRVn-2g@powergate.ca>

rbt wrote:
> Is there a recommended or 'Best Practices' way of checking the version 
> of python before running scripts? I have scripts that use the os.walk() 
> feature (introduced in 2.3) and users running 2.2 who get errors. 
> Instead of telling them, 'Upgrade you Python Install, I'd like to use 
> sys.version or some other way of checking before running.
> 
> Whatever I do, I need it to work on Linux, Mac and Windows.

Why does this have to occur "before running the script"?  Can't
you just do it as the first thing the script does on startup?
That is the usual Best Practice approach.

> I thought of sys.version... but getting info out of it seems awkward to 
> me. First 5 chars are '2.4.1' in string format have to split it up and 
> convert it to ints to do proper checking, etc. It doesn't seem that 
> sys.version was built with this type of usage in mind. So, what is the 
> *best* most correct way to go about this?

Use sys.version_info instead.  As it's a tuple, you can
just slice-and-dice as needed, and compare subsets of
it with other tuples.

-Peter


From roy at panix.com  Wed Apr  6 13:19:12 2005
From: roy at panix.com (Roy Smith)
Date: 6 Apr 2005 13:19:12 -0400
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<m3r7hp5njr.fsf@pc150.maths.bris.ac.uk>
	<42533b7c.414087696@news.oz.net>
	<mailman.1440.1112805829.1799.python-list@python.org>
Message-ID: <d315mg$riq$1@panix2.panix.com>

<bjourne at gmail.com> wrote:
>py.test is awesome, but there is one slight flaw in it. It produces to
>much output. All I want to see when all tests pass is "All X passes
>succeded!" (or something similar). py.test's output can be
>distracting.

I agree.


From mwm at mired.org  Mon Apr 25 10:09:56 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 09:09:56 -0500
Subject: Python, Perl & PDF files
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
Message-ID: <86d5sjosln.fsf@guru.mired.org>

rbt <rbt at athop1.ath.vt.edu> writes:

> Are there any plans in the near future to support PDF files in Python
> as   thoroughly and completely as Perl does?
>
> http://cpan.uwinnipeg.ca/search?query=pdf&mode=dist

Claiming that CPAN represents Perl "supporting" something isn't really
accurate. Those are just third party libraries, not support in the
language. There is an extensive set of third party libraries available
for Python as well, but there's no central repository to make finding
them easy.

That said, you can check out both pdflib and reportlab. pdflib is a
library that includes bindings for python, and reportlab is a
python-coded library for generating PDF. Since you don't say what you
want to do with PDF, I can't tell you which, if either, of these will
do what you want.

> I love Python's clean syntax and ease of use, etc. But on some things
> (PDF for example) as barbaric as Perl's syntax is, it does outshine
> Python... I hate having to use Perl just to deal with PDF files. What
> do others do???

CPAN is a nice thing, and I'm sure that someone, somewhere, is working
on producing one for Python. Until it shows up, you have to learn to
search multiple places for third party libraries. Google works in this
case - the very first link on a search for "python pdf" is to an
article that talks about using reportlab with python.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From estebistec at gmail.com  Thu Apr 14 10:02:13 2005
From: estebistec at gmail.com (Steven Cummings)
Date: Thu, 14 Apr 2005 09:02:13 -0500
Subject: A little request about spam
In-Reply-To: <d3fd636605041405592212edf8@mail.gmail.com>
References: <1113416856.914310.63930@l41g2000cwc.googlegroups.com>
	<t98r51pvr11i6fu4hhvu0pjis8o9tsakr9@4ax.com>
	<740c3aec05041405157cb90625@mail.gmail.com>
	<d3fd6366050414054728665d7e@mail.gmail.com>
	<7ee3dcd80504140551385ce25e@mail.gmail.com>
	<d3fd636605041405592212edf8@mail.gmail.com>
Message-ID: <c1169f9605041407027a785a4f@mail.gmail.com>

For what it's worth I filed a gmail issue over it a few days after I noticed 
it. I guess more of you could do so indicating the severity of the issue to 
the gmail developers. And I thought I was the only one...!

/S

On 4/14/05, mark hellewell <mark.hellewell at gmail.com> wrote:
> 
> On 4/14/05, James <spiralx at gmail.com> wrote:
> > Yes - it's been like that for the last month or so now and it's quite
> > annoying, especially seeing as before it was working at near enough
> > 100% accuracy.
> 
> And I don't suppose there's much we can do about it?
> 
> mark
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



-- 
Steven Cummings
estebistec at gmail.com
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From grante at visi.com  Fri Apr 22 15:13:55 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 19:13:55 -0000
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<1114191709.671893.254560@o13g2000cwo.googlegroups.com>
	<mailman.2297.1114193668.1799.python-list@python.org>
Message-ID: <116ij7j7ftj9p07@corp.supernews.com>

On 2005-04-22, Jaime Wyant <programmer.py at gmail.com> wrote:

> wxPython's creator, Robin Dunn doesn't seem to sleep or eat
> and is constantly answering questions.  No, I'm serious Robin
> doesn't eat or sleep

No kidding!  I think he puts more work into wxPython than a lot
of people put into their full-time jobs.  Every day right after
lunchtime (USA CST), there is always a whole batch of Robin's
answers to wxPython questions on the mailing list.

> Be warned though, that some people question the
> "cross-platformability" of wxPython.  I've been doing GUI
> stuff exclusively for windows, so I can't really speak to
> this.

I write (fairly simple apps) on Linux and deploy on Windows.
There is an occasional glitch, but it works far better than
anybody has any right to expect.

wxPython combined with py2exe and inno-setup can make writing a
windows app something that won't drive you to threats of
suicide.

-- 
Grant Edwards                   grante             Yow!  And furthermore,
                                  at               my bowling average is
                               visi.com            unimpeachable!!!


From quasara at earthlink.net  Thu Apr 21 17:41:28 2005
From: quasara at earthlink.net (sheltech)
Date: Thu, 21 Apr 2005 21:41:28 GMT
Subject: Good morning or good evening depending upon your location. I
	want to ask you the most important question of your life.
	Your joy or sorrow for all eternity depends upon your answer.
	The question is: Are you saved? It is not a question of how
	good you ar
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
Message-ID: <c6V9e.13384$44.11048@newsread1.news.atl.earthlink.net>


<RonGrossi382737 at yahoo.com> wrote in message
news:1114098221.580669.86300 at g14g2000cwa.googlegroups.com...
>


Don't you know that there's a special hell just for spammertrolls?.
You have much repenting to do . You wad.

Everybody






From contact at alanlittle.org  Thu Apr 28 13:15:51 2005
From: contact at alanlittle.org (Alan Little)
Date: 28 Apr 2005 10:15:51 -0700
Subject: Python or PHP?
References: <mailman.2419.1114383838.1799.python-list@python.org>	<4ef0f3a4.0504242339.56b0506d@posting.google.com>	<Xns96439421AE239castleamber@130.133.1.4>
	<mailman.2487.1114459699.1799.python-list@python.org>
Message-ID: <4ef0f3a4.0504280915.6fbc2177@posting.google.com>

Steve Holden <steve at holdenweb.com> wrote in message news:<mailman.2487.1114459699.1799.python-list at python.org>...
> John Bokma wrote:
> > Alan Little wrote:
> > 
> > 
> >>Steve Holden <steve at holdenweb.com> wrote:
> >>
> >>
> >>>Your statement then becomes
> >>>
> >>>select * from foo where bar=1; drop table foo
> >>>
> >>>which is clearly not such a good idea.
> >>
> >>I'm sure Steve is very well aware of this and was just providing a
> >>simple and obvious example, nevertheless it might be worth pointing
> >>out that anyody who connects their web application to their database
> >>as a user that has DROP TABLE privileges, would clearly be in need of
> >>a lot more help on basic security concepts than just advice on
> >>choosing a programming language.
> > 
> > 
> > True. But how does it stop someone who uses inserts? (I exclude the case 
> > inserts are not needed).

Inserts are indeed not needed, if you really don't want to allow them.
The web app user connects to a schema that has no direct write
privileges on anything. Instead it has execute permissions on stored
procedures in another schema that do the writes. In Oracle, at any
rate, the stored procedure then runs with the privileges of the schema
it is in, but the calling user doesn't need or get those privileges.
Over the top in many cases, but it's an extra layer of defence if you
want it.

> > 
> > 
> >>This goes back to the point somebody made earlier on in the thread -
> >>many web applications can be implemented as fairly simple wrappers
> >>around properly designed databases. "Properly designed" includes
> >>giving some thought to table ownership and privileges.
> > 
> > 
> > One should stop SQL injection always, no matter if the database takes care 
> > of it or not. There is no excuse (like, yeah, but I set up the privileges 
> > right) for allowing SQL injection, ever.

Wasn't suggesting that for a moment.

> > 
> Correct. If a thing can't go wrong, it won't.
> 
> In security several levels of defense are better than just one, so 
> database authorization and SQL injection removal should be considered 
> complimentary techniques of a "belt and braces" (US: "belt and 
> suspenders") approach.
> 
> regards
>   Steve

I completely agree of course. Do both.


From superprad at gmail.com  Mon Apr 25 17:13:34 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 25 Apr 2005 14:13:34 -0700
Subject: Bounding box on clusters in a 2D list
In-Reply-To: <1114457990.995627.224160@z14g2000cwz.googlegroups.com>
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
	<1114378980.909132.216600@f14g2000cwb.googlegroups.com>
	<1114456596.990810.233630@z14g2000cwz.googlegroups.com>
	<1114457990.995627.224160@z14g2000cwz.googlegroups.com>
Message-ID: <1114463614.451494.79010@o13g2000cwo.googlegroups.com>

Bearophile,I have written the floodfill in python with stack. But i
think I am making something wrong I dont get what i need.Need your
opinion.the code follows

def connected(m, foreground=1, background=0):
    def floodFill4(m, r,c, newCol, oldCol):
        if newCol == oldCol:
            print "empty stack"
            return -1
        while(m[r].pop(c)):
            m[r][c] = newCol
            if r+1 < maxr and m[r+1][c]==oldCol:
                if m[r+1][c] == 0:return
            if r-1 >= 0 and m[r-1][c]==oldCol:
                if m[r-1][c] == 0:return
            if c+1 < maxc and m[r][c+1]==oldCol:
                if m[r][c+1] == 0:return
            if c-1 >= 0 and m[r][c-1]==oldCol:
                if m[r][c-1] == 0:return

    maxr = len(m)
    maxc = len(m[0])
    newCol = 2
    oldCol = foreground
    for r in xrange(maxr):
        for c in xrange(maxc):
            if m[r][c] == oldCol:
                floodFill4(m, r,c, newCol=newCol, oldCol=oldCol)
                newCol += 1



From bryce.moore at gmail.com  Sat Apr 16 16:20:46 2005
From: bryce.moore at gmail.com (bryce.moore at gmail.com)
Date: 16 Apr 2005 13:20:46 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
Message-ID: <1113682846.004698.182180@l41g2000cwc.googlegroups.com>

Lucio,

Just tried to install it on my sony clie PEG-S360.  When I try to run
it I get:
Fatal Alert
pythonrun.c, Line: 1483,
Py_Initialize: can't init ints

Aside from my clie being significantly under-powered, I don't know what
else could be wrong.

What version of the Palm OS does this support?

Good luck with this.  I could use a more up-to-date python than Pippy
(http://pippy.sourceforge.net/) offers.

I didn't know where else to post / email this.

bryce



From sabbey at u.washington.edu  Sat Apr 16 17:02:32 2005
From: sabbey at u.washington.edu (Brian Sabbey)
Date: Sat, 16 Apr 2005 14:02:32 -0700
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <4260b4e3.65280488@news.oz.net>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<mailman.1993.1113618726.1799.python-list@python.org>
	<4260b4e3.65280488@news.oz.net>
Message-ID: <Pine.A41.4.61b.0504161346440.72462@dante72.u.washington.edu>

Bengt Richter wrote:
> On Fri, 15 Apr 2005 19:32:02 -0700, James Stroud <jstroud at mbi.ucla.edu> wrote:
>
>> I_vote_yes(James):
>>   I_understand_what_it_does = True
>>   Makes_code_formatting_way_more_managable_in_tough_cases = True
>>   Makes_code_way_more_readable = True
>>   To_cool = True
>>
>> On Friday 15 April 2005 04:45 pm, Brian Sabbey wrote:
>>> Here is a pre-PEP for what I call "suite-based keyword arguments". The
>>> mechanism described here is intended to act as a complement to thunks.
>>> Please let me know what you think.
>>>
> Kind of cool. If we had full lambdas aka as anonymous defs (def foo(...) with foo left out ;-)
> would this be concise sugar for the equivalents shown below your examples?
>
> (The rule for parsing the suite of an anonymous def is that the left column of the first non-space
> character of the first suite statement following the def(): becomes the suite indent reference,
> and a dedent to the left of that ends the def(): or a closing bracket not opened in the def(): suite
> also ends it. Otherwise it is standard suite indentation)
>
>>> Suite-Based Keyword Arguments
>>> -----------------------------
>>>
>>> Passing complicated arguments to functions is currently awkward in Python.
>>> For example, the typical way to define a class property winds up polluting
>>> the class's namespace with the property's get/set methods.  By allowing
>>> keyword arguments to be defined in a suite following a function call,
>>> complicated arguments can be passed in a cleaner, easier way.
>>>
>>> Examples
>>> ========
>>>
>>> Using suite-based keyword arguments, the code
>>>
>>> f(x = 1)
>>>
>>> is equivalent to
>>>
>>> f():
>>>     x = 1
>
>   f(**def():
>         x = 1
>         return vars())

Yes, it seems it would just be sugar for full lambdas.  Although, in this 
example and the others, wouldn't you have to actually call the anonymous 
function?

f(**(def():
 	x = 1
 	return vars())())

Otherwise it seems like you are trying to pass a function, not the 
keywords the function returns.

One could, of course, also do the same with a named function:

def no_longer_anonymous():
 	x = 1
 	return vars()

f(**no_longer_anonymous())

-Brian


From shama.bell at gmail.com  Fri Apr  1 13:34:12 2005
From: shama.bell at gmail.com (shama.bell at gmail.com)
Date: 1 Apr 2005 10:34:12 -0800
Subject: numeric module
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
	<l9udnTOH3bYvEtDfRVn-vA@comcast.com>
Message-ID: <1112380452.032759.226370@o13g2000cwo.googlegroups.com>

Thanks Steve.

There's a problem with Numeric array. I tried with numarray and it
works fine.

-SB



From dcrespo at gmail.com  Thu Apr  7 12:14:50 2005
From: dcrespo at gmail.com (dcrespo)
Date: 7 Apr 2005 09:14:50 -0700
Subject: client-client connection using socket
In-Reply-To: <mailman.1475.1112866267.1799.python-list@python.org>
References: <1112859364.203394.34100@g14g2000cwa.googlegroups.com>
	<mailman.1475.1112866267.1799.python-list@python.org>
Message-ID: <1112890490.135613.235510@f14g2000cwb.googlegroups.com>

"Client" and "Server" are just definitions or convention names. If your
program "listens" to connections, then it is a server. Just it.



From tiissa at nonfree.fr  Tue Apr 19 16:02:15 2005
From: tiissa at nonfree.fr (tiissa)
Date: Tue, 19 Apr 2005 22:02:15 +0200
Subject: The value of the entry widget doesn't get updated
In-Reply-To: <ea0a4a1a.0504190736.1490276b@posting.google.com>
References: <ea0a4a1a.0504190736.1490276b@posting.google.com>
Message-ID: <426563c7$0$20623$626a14ce@news.free.fr>

Clara wrote:
<SNIP>
> 		self.loginButton = Button(self, text='Login', command =
> VerifyProcessor(self.x.get(), self.y.get()) )
<SNIP>
> 
> class VerifyProcessor:
> 
> 	def __init__(self, thename, thepass):
> 		self.username = thename
> 		self.password = thepass
> 
> 	def __call__(self):
> 		print self.username
> 		print self.password

Your VerifyProcessor object is constructed just before your loginButton, 
not when you click.
Therefore you may want to pass the x and y StringVars to its __init__ 
function instead of their value at contruction. Therefore your __call__ 
method can .get() their values each time the button is clicked.


From __peter__ at web.de  Sun Apr 17 15:56:02 2005
From: __peter__ at web.de (Peter Otten)
Date: Sun, 17 Apr 2005 21:56:02 +0200
Subject: Decorator Syntax For Recursive Properties
References: <11640g942e65da1@corp.supernews.com>
Message-ID: <d3uf05$pgp$04$1@news.t-online.com>

Jeffrey Froman wrote:

> it is the originating node (the node trying to find its ancestors). So
> something like this didn't work for me:
> 
> @property
> def?ancestors(self):
>     if?self.parent?is?None:
>         return?[self.name]
>     return?[self.name]?+?self.parent.ancestors

But this will, I suppose:

@property
def ancestors(self):
    if self.parent:
        return self.parent.ancestors + [self.parent]
    return []
 
A non-recursive variant:

@property
def ancestors(self):
    result = []
    node = self.parent
    while node:
        result.append(node)
        node = node.parent
    result.reverse()
    return result

Peter



From trentm at ActiveState.com  Tue Apr 26 14:02:33 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Tue, 26 Apr 2005 11:02:33 -0700
Subject: Coding Standards (and Best Practices)
In-Reply-To: <1114538687.21150@hqnntp01.autodesk.com>
References: <1114538687.21150@hqnntp01.autodesk.com>
Message-ID: <20050426180232.GB14191@ActiveState.com>

[Isaac Rodriguez wrote]
> Hi,
> 
> I am fairily new to Python, but I am really liking what I am seeing. My team 
> is going to re-design some automation projects, and we were going to use 
> Python as our programming language. One of the things we would like to do, 
> since we are all new to the language, is to define a set of guidelines and 
> best practices as our coding standards.
> 
> Does anyone know where I can get some information about what the community 
> is doing? Are there any well defined guidelines established?

http://www.python.org/peps/pep-0008.html


Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From apardon at forel.vub.ac.be  Thu Apr 21 02:28:42 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 06:28:42 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
	<slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2178.1114006723.1799.python-list@python.org>
Message-ID: <slrnd6ei0q.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Bill Mill schreef <bill.mill at gmail.com>:
> On 20 Apr 2005 13:39:42 GMT, Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>> Op 2005-04-20, Bill Mill schreef <bill.mill at gmail.com>:
>> 
>> You write this af if other solutions can't be consistent.
>
> Propose one, and I won't write it off without thinking, but my bias is
> way against it from experience. Knowledge gets scattered across the
> program,

Knowledge always gets scattered across the program. The end
index can vary endlessly but that doesn't seem to worry
you. So why is a varying start index so worrysome?

> unless you're defining the start index every time you use the
> list, which seems no better than adding an offset to me.

I don't see why the start index can't be accessible through
a method or function just like the length of a list is now.

My favourite would be a range method so we would have
the following idiom:

  for i in lst.range():
    do something with lst[i]


From listspam at flowtheory.net  Sun Apr 10 17:57:20 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Sun, 10 Apr 2005 15:57:20 -0600
Subject: Weird...
Message-ID: <8444b503a2c5e3cc57b3b465788ab493@flowtheory.net>

 >>> {'a':1,'b':'2','c':[3,4]}.keys()
['a', 'c', 'b']

How come? :-)

-jag

Python 2.3.3 (#1, May  7 2004, 10:31:40)
[GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131

From gerald.maher at waytohere.com  Mon Apr 11 17:06:42 2005
From: gerald.maher at waytohere.com (gerald.maher at waytohere.com)
Date: 11 Apr 2005 14:06:42 -0700
Subject: Correct Versions to execute Corba calls using omniORBpy and omniORB.
Message-ID: <1113253602.514404.247460@z14g2000cwz.googlegroups.com>

Hi, I just want to execute a script that used omniORB, omniORBpy
Python,

Here are the version that I Tried, is this correct ?

omniORBpy 2.5
omniORB 4.0.5
Python 2.4.1

The script is below:

#!/usr/bin/env python

import sys
from omniORB import CORBA, PortableServer

# Import the stubs and skeletons for the Example module
import Example, Example__POA

# Define an implementation of the Echo interface
class Echo_i (Example__POA.Echo):
    def echoString(self, mesg):
        print "echoString() called with message:", mesg
        return mesg

# Initialise the ORB
orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)

# Find the root POA
poa = orb.resolve_initial_references("RootPOA")

# Create an instance of Echo_i
ei = Echo_i()

# Create an object reference, and implicitly activate the object
eo = ei._this()

# Activate the POA
poaManager = poa._get_the_POAManager()
poaManager.activate()

# Call the object's echoString() operation

message = "Hello"
result  = eo.echoString(message)

print "I said '%s'. The object said '%s'." % (message,result)


What are the correct version i should use ?



From ajikoe at gmail.com  Tue Apr 26 04:36:30 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 26 Apr 2005 01:36:30 -0700
Subject: create python process
In-Reply-To: <86mzrmm0p0.fsf@guru.mired.org>
References: <1114493653.057561.96260@o13g2000cwo.googlegroups.com>
	<86mzrmm0p0.fsf@guru.mired.org>
Message-ID: <1114504590.890211.75430@f14g2000cwb.googlegroups.com>

I use windows and os.fork is not working in windows.
Can we create process inside python I mean I have function and I want
to run it as a process not a thread ?

Should I run code from os. in order to run  a processes?

Sincerely Yours,
pujo



From michele.simionato at gmail.com  Sat Apr  9 12:07:29 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Apr 2005 09:07:29 -0700
Subject: Multiple inheritance: Interface problem workaround,
	please comment this
In-Reply-To: <slrnd5fusg.h7p.axel@m2.sine>
References: <slrnd5am6f.7ed.axel@m2.sine><ybCdnTBdnr30w8jfRVn-pQ@comcast.com>
	<slrnd5c9qk.9rm.axel@m2.sine>
	<1112963912.909325.186760@f14g2000cwb.googlegroups.com>
	<slrnd5fusg.h7p.axel@m2.sine>
Message-ID: <1113062849.105547.229830@z14g2000cwz.googlegroups.com>

Look at the comment in the code! I have posted the "decorate" module in
the this
decorator thread:
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/60f22ed33af5dbcb/b7239b45da6a67ab#b7239b45da6a67ab



From dcrespo at gmail.com  Wed Apr 27 07:19:53 2005
From: dcrespo at gmail.com (dcrespo)
Date: 27 Apr 2005 04:19:53 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <116tf7lm0ivnl6c@corp.supernews.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
	<116tf7lm0ivnl6c@corp.supernews.com>
Message-ID: <1114600793.617469.81200@z14g2000cwz.googlegroups.com>

Aaaaaaand: which do you prefer?

Daniel



From listspam at flowtheory.net  Fri Apr  8 16:11:46 2005
From: listspam at flowtheory.net (Joshua Ginsberg)
Date: Fri, 8 Apr 2005 14:11:46 -0600
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <4256E0EC.6020100@gmail.com>
References: <d36hnj$6h6$1@sea.gmane.org>
	<303268b6f1dbd8823c988e145bf45ad4@flowtheory.net>
	<4256E0EC.6020100@gmail.com>
Message-ID: <cc56b1d3d3ab1709b022bb4af0484f7d@flowtheory.net>

try:

filter(lambda x: lines[x].find(searchstring) != -1, range(len(lines)))

That will return a list with the indices of every line containing a hit 
for your search string.

-jag

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Joshua Ginsberg -- joshg at brainstorminternet.net
Brainstorm Internet Network Operations
970-247-1442 x131
On Apr 8, 2005, at 1:52 PM, Jeremy Conlin wrote:

> Joshua Ginsberg wrote:
>
>> Try:
>>
>> filter(lambda x: x.find(searchstring) != -1, lines)
>>
> I really like this option, but what I want to  know where in the file 
> this line exists (i.e. line 42).  Can  I somehow access this line and 
> the lines immediately following?
> Thanks,
> Jeremy
>

From sarapythonlist at yahoo.com  Wed Apr 13 11:13:21 2005
From: sarapythonlist at yahoo.com (Sara Khalatbari)
Date: Wed, 13 Apr 2005 08:13:21 -0700 (PDT)
Subject: Codig style: " or """
Message-ID: <20050413151321.791.qmail@web61109.mail.yahoo.com>

Hi!

Suppose you're writing a module & writing the
definition of each function in that module in " or
""".
for example:
a) "This function does this & that"
or:
b)  """This function does blah blah blah"""

What are the differences between " and """ ? 
I'm using gedit & I wanna know a bit about coding
style.

To be very honest: I have a very strict boss who looks
for bugs in my codes & he insists to know exactly
which 'CODING STYLE AUTHORITATIVE SOURCE' I've based
my coding style on when using " or """.

Can anybody out there give me some hint?
Can anybody tell me where to find a document on python
coding style.

tnx,
Sara


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/


From me at privacy.net  Mon Apr 18 17:29:02 2005
From: me at privacy.net (Dan Sommers)
Date: 18 Apr 2005 17:29:02 -0400
Subject: Slight discrepancy with filecmp.cmp
References: <mailman.2039.1113797181.1799.python-list@python.org>
	<hdf661dugeimek4tgesr863rgcb3gmh5dv@4ax.com>
	<mailman.2050.1113836579.1799.python-list@python.org>
Message-ID: <m2br8bzsdd.fsf@unique.fully.qualified.domain.name.yeah.right>

On Mon, 18 Apr 2005 09:02:44 -0600,
Ivan Van Laningham <ivanlan at pauahtun.org> wrote:

> ... Shows how much you need another set of eyeballs to debug your
> brain;-)

+1 QOTW

> ... And my wife never sees anything the way I do;-)

There's probably a rude joke in there somewhere about your wife's eyes
debugging your brain, but since I would like to remain married, I will
not make it.  :-/

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
?? ? ?? ? c? = 1


From timr at probo.com  Fri Apr  8 02:48:10 2005
From: timr at probo.com (Tim Roberts)
Date: Thu, 07 Apr 2005 23:48:10 -0700
Subject: change extensions
References: <4251cef9@dnews.tpgi.com.au>
Message-ID: <h8ac51h8qv096ccg36mv3rb0ulivib36de@4ax.com>

"Bob Then" <bob_then at yahoo.com.au> wrote:

>how can i change all files from one extension to another within a direcory?

In Windows, the quickest way is:

    os.system( "rename *.old *.new" )
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From fredrik at pythonware.com  Thu Apr 21 12:28:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 18:28:54 +0200
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com><1114098472.768814.281750@g14g2000cwa.googlegroups.com><mailman.2235.1114098946.1799.python-list@python.org>
	<1114099603.516710.150680@z14g2000cwz.googlegroups.com>
Message-ID: <d48k3p$vin$1@sea.gmane.org>

Paul McGuire wrote:

> I'd be very interested to see if there actually is a benchmark suite
> for regexp's.  I imagine that this could be an easy area for quite a
> varied set of results, depending on the expression features included in
> the actual regexp being tested, and even the nature of the input text.
> For example, a simple re that just scans for words in a text stream may
> perform very differently from one that searches for delimited text, has
> to lookahead for greedy matches, maintains return groups, performs
> named substitutions, etc.
> 
> Without a pretty thorough benchmark suite, I would be dubious of
> performance claims being very much better than anecdotes.

we did fairly extensive benchmarks when moving from PRE to SRE back in
the 1.6 days (partially based on benchmarks developed when moving from
REGEX to PRE):

    http://mail.python.org/pipermail/python-dev/2000-August/007797.html

(but as you can see, this benchmarking was done to make sure that the new
engine didn't slow things down, not to see if SRE was slower or faster than
the "competition".  feel free to try the microbenchmarks with recent versions
of Python and you're favourite non-Python language...)

</F>



From mwm at mired.org  Sat Apr 23 23:39:38 2005
From: mwm at mired.org (Mike Meyer)
Date: Sat, 23 Apr 2005 22:39:38 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
Message-ID: <86y8b8rgg5.fsf@guru.mired.org>

John Bokma <postmaster at castleamber.com> writes:

> Mike Meyer wrote:
>
>> John Bokma <postmaster at castleamber.com> writes:
>> 
>>> Mike Meyer wrote:
>>>
>>>> "Simon John" <simoninusa2001 at yahoo.co.uk> writes:
>>>> 
>>>>> I still love Perl, it's a bit of an art form, as "there's more than
>>>>> one way to do it", whereas Python usually only allows one way to do
>>>>> it, which may or may not be a better mantra....
>>>> 
>>>> The Python mantra leads to 1) less programmer overhead, and 2) 
> faster
>>>> improvements in the language.
>>>> 
>>>> To be a Perl expert, you have to know which of the many ways to do
>>>> various things is the fasted under what conditions.
>>>
>>> Why?
>> 
>> One of the stated conditions for more than one Perl position I've
>> looked at.
>
> That's weird, since some can differ between versions of Perl like for 
> example a map in a void context. And I am sure Python has now and then 
> improvements which make one operation suddenly 10% faster in a new 
> version.

The things is - it doesn't matter nearly as much in Python. Since
there's only one obvious way to do most simple things, that's the one
that most programmers will choose, and that's the one the developers
will worry about making faster.

> So it tells you a lot about the people providing the position ;-)

Yeah - they expect their people to be on top of such things. I've
never run across a Python position where knowing which of several ways
was faster was an important criterion - because there usually aren't
several ways.


>>>> Having only one obvious way
>>> I doubt that too ;-)
>> Try programming in older Python for a while. You'll quit doubting it.
> Again I doubt that. I doubt that if I give 100 old Python programmers a 
> certain computer science problem I will see 100 exactly the same 
> solutions, which when benchmarked run equally fast.

Depends on the problem. If it's one of the things for which Python has
an obvious solution (sort a list; split a string on whitespace; pull
select list elements based on a criteria of some kind; search a file
for lines with a given word in them; etc.) you'd get back the same
answer from almost all of them.

As I've said a number of times, this has changed lately as new
features have been added without removing their older counterparts.

>>>> to do things means developers only have to
>>>> worry about impact on that way when making improvements, which will
>>>> speed them up.
>>> Yeah, Perl programmers are extremely slow ;-)
>> Nah, they aren't slow. They just have to worry about more things than
>> the Python developers.
> Do you have references to this? I would love to see if indeed 100 Python 
> programmers do implement, say 5 CS tasks faster compared to 100 Perl 
> programmers, on average.

I'm talking about the people developing the language, not the ones
developing in the language. And this is just my impression from
watching the developers lists.

>> If speed
>> is an issue, you should probably pick a different
>> algorithm. Well-written Python programs use the C-coded parts of
>> Python for the time-critical part of the code.
> Why are those time critical parts not written in Python ;-)

Because then they'd be slower. A good scripting environment has lots
of operations available that are coded at a low level. Since this code
is usually hand-tuned and optimized over time (like the dictionary
lookup or string operations in Python, or regular expressions in Perl
- I'm not sure about the RE library in Python), it may well be faster
than what you'd write in the low level language if you did it
yourself.

>>> Use the one that is the easiest to read and understand by yourself.
>>> That's how I program Perl, and that's how I am going to program 
> Python. 
>> The thing is, in Python there usually is one obvious way to do
>> things. That's changed in recent years as improvements have been added
>> without dropping the features they replaced so as not to break old
>> programs.
> I know to little about Python, especially about old Python, to have an 
> idea of what you mean. I only saw, quite recently, someones solution to 
> a problem that used 30 lines of Python, and I am sure I could have 
> written it in 3-4. And I doubt that's because he was using, or I was 
> thinking in, new Python
> :-D.

Just because there's only one obvious way to do things doesn't mean
it's obvious to everyone. Witness the recent spate of people asking
for "goto".

>>> An overloaded toolbox doesn't mean that if you have to hang a 
> painting
>>> on the wall that you have to think for 6 hours which tool you should
>>> use. You just take the one that does the job in a way you feel
>>> comfortable with. I know that the Perl mantra is often misunderstood,
>>> but in my experience only by people who have very little experience 
> with
>>> the language. 
>> The problem with using "the way you feel comfortable with" is that it
>> may not be comfortable for the maintainer - even if that's you six
>> months from now.
> After 5 years one gets comfortable with most constructions in a 
> language. I am more often uncomfortable with the way someone translates 
> a problem into code. And there is no way how you can force people with a 
> language that is, to do that the same, not even close.

Of course not. The best you can do is provide one obvious way to do
things, and then hope most people find that.

>> My Perl evolved from very shell script like (lots of
>> backticks and passing around the full text of files)
> I am sure you can do that with Python too.

That hasn't happened in 9 years of Python. Some of the idioms have
changed because the language has changed, but not because my
perceptions/expectations/etc have changed.

>> to one more
>> C-like as I used the language. That change was largely driven by
>> performance concerns as my understanding of the language grew.
> Yup, in Perl one should program Perl, not bash, not C. Same for Python.

Right. But Perl makes it *easy* to program in bash or C while staying
in Perl, and provides no obvious drawbacks from doing so - all because
it's trying to be comfortable to sh and C programmers by providing
ways to do things that those users are comfortable with. Trying to
write sh or C in Python is painfull, and you usually run into
problems/drawbacks fairly quickly - because that's not the obvious way
to do things.

   <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From zathras at thwackety.com  Sun Apr 24 09:43:34 2005
From: zathras at thwackety.com (Michael Sparks)
Date: Sun, 24 Apr 2005 14:43:34 +0100
Subject: Is this a bug?
Message-ID: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>

Hi,


I've hit a corner case that I can explain to myself *why* it happens, both
under python 2.3 and python 2.4, but the following inconsistency makes me
wonder if I should log it as a bug:

First the behaviour that isn't unexpected:

>>> a=["hello"]
>>> a = a + "world"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: can only concatenate list (not "str") to list
>>> 

Which is pretty what I'd expect.

However if we do this just slightly differently:

>>> a = ["hello"]
>>> a += "world"
>>> a
['hello', 'w', 'o', 'r', 'l', 'd']

We get completely different behaviour. This strikes me as a bug - should I
log it as one, or is there a good reason for this behaviour?

Regards,


Michael.



From andreif at mail.dntis.ro  Sat Apr 23 04:38:57 2005
From: andreif at mail.dntis.ro (Stormbringer)
Date: 23 Apr 2005 01:38:57 -0700
Subject: tracing function calls
Message-ID: <1114245537.919546.254320@f14g2000cwb.googlegroups.com>

Greetings,

I've been wondering if there is a mechanism similar to trace/untrace
found in lisp, for example call trace(function-name) and whenever this
function is called it will show its parameters to stdout ....



From bdesth.quelquechose at free.quelquepart.fr  Thu Apr 14 16:07:28 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 14 Apr 2005 22:07:28 +0200
Subject: Converting a perl module to a python module would it be worthit?
In-Reply-To: <425ea78e$1@usenet.ugs.com>
References: <425e7c41$1@usenet.ugs.com><425e8494$0$10741$626a14ce@news.free.fr>
	<mailman.1908.1113491570.1799.python-list@python.org>
	<425ea78e$1@usenet.ugs.com>
Message-ID: <425ec96f$0$865$636a15ce@news.free.fr>

Mothra a ?crit :
(snip)

> I checked out the above link (thanks!!)  I need to look deeper
> at the docs for creating a "module"

Well, start with wrting the code - you'll take care of 
how-to-distribute-it later.

> Thanks all for the responses!!

You're welcome.


From sjmachin at lexicon.net  Sun Apr 17 21:51:10 2005
From: sjmachin at lexicon.net (John Machin)
Date: Mon, 18 Apr 2005 11:51:10 +1000
Subject: Pattern Matching Given # of Characters and no String Input;
	use RegularExpressions?
References: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>
	<42623565$0$3566$626a14ce@news.free.fr>
	<42623ba8$0$10322$636a15ce@news.free.fr>
	<ae0b1ff7.0504171712.731fabd3@posting.google.com>
Message-ID: <aq3661d0q7f204t61f4mghf01fm8v5g9pv@4ax.com>

On 17 Apr 2005 18:12:19 -0700, sm.synonymous at gmail.com (Synonymous)
wrote:

>
>I will look for a Left$(str) function that looks at the first X
>characters for python :)).
>

Wild goose chase alert! AFAIK there isn't one. Python uses slice
notation instead of left/mid/right/substr/whatever functions. I do
suggest that instead of looking for such a beastie, you read this
section of the Python Tutorial: 3.1.2 Strings. 

Then, if you think that that was a good use of your time, you might
like to read the *whole* tutorial :))

HTH,

John



From radam2_ at _tampabay.rr.com  Sat Apr  9 01:08:35 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Sat, 09 Apr 2005 05:08:35 GMT
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org>
Message-ID: <ioke51hb6cn7tvc18trf4njpof49m0bsnl@4ax.com>

On Fri, 08 Apr 2005 05:15:23 -0400, vegetax <vegeta.z at gmail.com>
wrote:

>Are those issues being considered right now? i cant find any PEP addressing
>the issue especifically, at least cooking it for python 3000.
>
>specific topics could be:
>
>grouping related modules.
>removing useless legacy modules.
>refactoring duplicated functionality.
>removing/redesigning poorly written modules.
>adding a module versioning system.

I've been thinking that the lib directory could be better named and
rearranged a bit.  I sometimes mistakenly open the libs directory
instead of lib because of the name similarity.

An alternative might be to use the name "packs" or "packages" in place
of "lib", which would emphasize the use of packages as the primary
method of extending python. The standard library could then be a
package called "stdlib" within this directory. Third party packages
would then be along side "stdlib" and not within a directory that is
within the standard library.

It would be mostly a cosmetic change, but I believe it would be worth
doing if it could be done without breaking programs that may have hard
coded path references to the library.  :-/

Ron



From tpherndon at gmail.com  Sun Apr 17 19:11:19 2005
From: tpherndon at gmail.com (Peter Herndon)
Date: 17 Apr 2005 16:11:19 -0700
Subject: MS SQL Server/ODBC package for Python
References: <425faff2$0$298$ed9e5944@reading.news.pipex.net>
	<mailman.1957.1113568143.1799.python-list@python.org>
	<1113579774.353462.30960@l41g2000cwc.googlegroups.com>
	<42603197.9090002@egenix.com>
	<mailman.1988.1113604089.1799.python-list@python.org>
	<4260ff70$0$7511$79c14f64@nan-newsreader-07.noos.net>
Message-ID: <1113779479.783895.283580@g14g2000cwa.googlegroups.com>

:) Knock away, as my info isn't scientific anyway.  In my case, ASA is
*not* local.  The db is running on a 500MHz x 2 server with 768MB RAM,
over 100BaseT connection.  That same server is also running the MSSQL
instance, and IIS.

Running your benchmark, I ran into a couple of interesting points.
Using mx.ODBC, my times were 0.54 seconds and 6.56 seconds
respectively, while using adodbapi my results are 3.55 seconds and 25.9
seconds respectively.  mx.ODBC is faster with the simple query you
provide.

Next I modified the benchmark to reflect my particular circumstances
more accurately (?Maybe?  Comments invited).  I changed the query to
one of the queries in regular use in my application.  This query
selects 26 columns from 3 joined tables, with a where clause "where
f476 = ?", and I provide the missing value as a tuple in the execute
statement.  Note that, as I mentioned in my reply to M-A, the f476
field is not indexed, and is a long varchar.  Again, the system is
bought, so I have no control over the schema. ;)

The other change I made was to reduce the number of iterations from 100
to 10.  Since there are 128000 records in the main table, the wait for
100 iterations was too long for my patience.  Under these
circumstances, mx.ODBC's numbers are 188.49 seconds and 377.56 seconds
respectively, and adodbapi's times are 111.15 seconds and 223.55
seconds respectively.

My first wall-clock impressions are obvious exaggerations of reality,
for which I duly apologize to all.  However, adodbapi did prove to be
faster in my admittedly very wacky common use case.  Slower to connect,
but faster to run a substantial query.

Comments?  Questions?  Suggestions for improvement?



From bsprings at bestweb.net  Sun Apr 10 19:49:30 2005
From: bsprings at bestweb.net (BrianS)
Date: 10 Apr 2005 16:49:30 -0700
Subject: Python 2.4.1 install broke RedHat 9 printconf-backend
Message-ID: <1113176970.564908.293230@o13g2000cwo.googlegroups.com>

Hi,

I'm trying to learn Python and wanted to play with Tkinter.  I couldn't
get it to work so I figured it would help if I installed the newest
verison of Python.  I downloaded the source, compiled it and installed
it.  No problem.  The next time I booted my machine I the following
errors when it tried to start CUPS:

Traceback (most recent call last):
  File "/usr/sbin/printconf-backend", line 6, in ?
    import backend
  File "/usr/share/printconf/util/backend.py", line 37, in ?
    import cups_import
  File "/usr/share/printconf/util/cups_import.py", line 7, in ?
    from printconf_conf import *
  File "/usr/share/printconf/util/printconf_conf.py", line 83, in ?
    from xml.utils import qp_xml
ImportError: No module named utils

It seems that the xml package have been changed.  My problem is that I
don't know enough Python to fix it properly.  The old verison of Python
was 2.2.2 and the
version I just installed is 2.4.1.  This is on a Dell Inspiron 8500
running Red Hat 9.

Anyone have any ideas?  Thanks in advance.
Brian



From pinard at iro.umontreal.ca  Wed Apr  6 11:35:22 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Wed, 6 Apr 2005 11:35:22 -0400
Subject: Best editor?
In-Reply-To: <xqxll7wougu.fsf@cola2.ca.boeing.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<xqxll7wougu.fsf@cola2.ca.boeing.com>
Message-ID: <20050406153522.GA25715@alcyon.progiciels-bpi.ca>

[Harry George]

> 5. When I do Extreme Programming, the other author(s) tend to be using
> emacs, vim, or nedit. [...]

Speaking of, when everybody uses Emacs, there is a way for Emacs for
allowing many users, each on a different networked machine, all on the
very same buffer, simultaneously.  This sharing has been useful to us in
a number of occasions, and we had scripts for quickly initiating such
collaboration at any time (resolving `xauth' matters, for example).
Note that it requires a lot of confidence between the collaborating
users, as they all have extended powers on the editing session.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From bokr at oz.net  Wed Apr 20 00:35:31 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 20 Apr 2005 04:35:31 GMT
Subject: How to Convert a makefile to Python Script
References: <1113968971.081613.140640@l41g2000cwc.googlegroups.com>
Message-ID: <4265db87.28722550@news.oz.net>

On 19 Apr 2005 20:49:31 -0700, rkoida at yahoo.com wrote:

>Hello All
>   I am working on a Problem to convert makefile in to a python script.
>Are there any Modules? Please try to comment.
>
>Thanks
>rkoida
>
IIUC, the scons project came to be to implement make functionality in python,
so I'd try to find someone there to ask. They must have thought about it a lot.

http://www.scons.org/

Regards,
Bengt Richter


From peter at engcorp.com  Wed Apr 20 09:30:07 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 09:30:07 -0400
Subject: goto statement
In-Reply-To: <d45kna$f1o$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
Message-ID: <N5udnV2nWJmKwfvfRVn-rA@powergate.ca>

Maxim Kasimov wrote:
> Torsten Bronger wrote:
> 
>> Hall?chen!
>>
>> Maxim Kasimov <kasimov at i.com.ua> writes:
>>>
>>> WOW, just greate! ... but i'd like to relax at some more
>>> interesting way than to comment each of rows
> 
> but what if i just can't to do this becouse i'm working thrue ssh, and 
> have to use only installed editors (such as vi)

Surely you use more than one-character indents?  If
that's so, you can just insert the "if 0:" using, say,
two characters indentation instead of the usual four.
Then the following four-character-indented code is
removed.

Alternatively, use ''' and ''' surrounding the code
block and it will be ignored.

-Peter


From phil_nospam_schmidt at yahoo.com  Thu Apr 21 23:19:40 2005
From: phil_nospam_schmidt at yahoo.com (phil_nospam_schmidt at yahoo.com)
Date: 21 Apr 2005 20:19:40 -0700
Subject: How to prevent Tkinter frame resize?
Message-ID: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>

I am trying to prevent a user from resizing a frame beyond its
"natural" size as given by winfo_reqwidth and winfo_reqheight, without
any success. Can anyone make any suggestions, based on my code below?

Thanks!

from Tkinter import *

class Table(Frame):
    def __init__(self, master,
                 rows=['row 1'], cols=['col 1'],
                 row_labels=True,
                 col_labels=True,
                 row_buttons=True,
                 col_buttons=True):
	Frame.__init__(self, master)
	self.rows = rows
	self.cols = cols
        self.row_labels = row_labels
        self.col_labels = col_labels
        self.row_buttons = row_buttons
        self.col_buttons = col_buttons
        self.col_width = 6
        self.draw()
        self.bind('<Configure>', self.changed)
    def changed(self, ev):
        w, h = self.winfo_reqwidth(), self.winfo_reqheight()
        cfg = {}
        if ev.height > h:
            cfg['height'] = h
        if ev.width > w:
            cfg['width'] = w
        if cfg:
            self.config(**cfg)   ######## this has no effect ########
    def draw(self):
        if self.row_labels or self.row_buttons:
            col = 1
            for t in self.cols:
                if self.row_labels:
                    e = Entry(self, width=self.col_width,
                              relief=GROOVE)
                    e.insert(INSERT, t)
                    e.grid(row=0, column=col+1)
                if self.row_buttons:
                    e = Label(self, text=col, width=self.col_width,
                              relief=GROOVE,bg='gray', fg='blue')
                    e.grid(row=1, column=col+1)
                col += 1
        if self.col_labels or self.col_buttons:
            row = 1
            for t in self.rows:
                if self.col_labels:
                    e = Entry(self, width=15,
                              relief=GROOVE)
                    e.insert(INSERT, t)
                    e.grid(row=row+1, column=0)
                if self.col_buttons:
                    e = Label(self, text=row, width=self.col_width,
                              relief=GROOVE,bg='gray', fg='blue')
                    e.grid(row=row+1, column=1)
                row += 1


if __name__ == '__main__':
    top = Tk()
    cols = ['col %s' % i for i in range(5)]
    rows = ['row %s' % i for i in range(5)]
    s = Table(top, rows=rows, cols=cols)
    s.pack(fill=BOTH, expand=1)
    mainloop()



From mlh at selje.idi.ntnu.no  Sun Apr 10 08:44:45 2005
From: mlh at selje.idi.ntnu.no (Magnus Lie Hetland)
Date: Sun, 10 Apr 2005 12:44:45 +0000 (UTC)
Subject: Positions of regexp groups
References: <slrnd5d153.7ht.mlh@selje.idi.ntnu.no>
	<mailman.1535.1112968172.1799.python-list@python.org>
Message-ID: <slrnd5i7tt.1mq.mlh@selje.idi.ntnu.no>

In article <mailman.1535.1112968172.1799.python-list at python.org>, Tim
Peters wrote:
>[Magnus Lie Hetland]
>> Just a quick question: Does anyone have a simple way of finding the
>> positions (start, end) of the groups in a regexp match? AFAICS, the re
>> API can only return the contents...?
>
>Read the docs for match objects, esp. the start(), end(), and span()
>methods.

Right. I was just now editing the regex-stuff in my book for the
second edition, and found that I had, in fact, written about just this
behaviour. <blush/>

Oh, well. I guess it's a feature I don't use much :}

Thanks, anyway.

-- 
Magnus Lie Hetland                    Fall seven times, stand up eight
http://hetland.org                                  [Japanese proverb]


From iny+news at iki.fi  Tue Apr 26 01:17:24 2005
From: iny+news at iki.fi (Ilpo =?iso-8859-1?Q?Nyyss=F6nen?=)
Date: Tue, 26 Apr 2005 08:17:24 +0300
Subject: Object oriented storage with validation
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<d48ktk$4ov$1@news.vcd.hp.com> <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>
	<mailman.2250.1114119969.1799.python-list@python.org>
	<m3sm1jbfek.fsf@iny.iki.fi> <du7sm1j6uzc.fsf@mozart.cc.tut.fi>
	<m3u0lzm5q1.fsf@iny.iki.fi>
	<roy-F93E58.08375122042005@reader1.panix.com>
	<m3oec6c056.fsf@iny.iki.fi>
	<mailman.2289.1114190176.1799.python-list@python.org>
	<m3k6muaxmi.fsf@iny.iki.fi> <du74qdxr0ue.fsf_-_@lehtori.cc.tut.fi>
	<m3ekd0vd6i.fsf_-_@iny.iki.fi> <du74qdv3l46.fsf@mozart.cc.tut.fi>
Message-ID: <m3is2a15i3.fsf@iny.iki.fi>

Ville Vainio <ville at spammers.com> writes:

>>>>>> "Ilpo" == Ilpo Nyyss?nen <iny> writes:
>
>     Ilpo> Pickle doesn't have validation. I am not comfortable for
>     Ilpo> using it as storage format that should be reliable over
>     Ilpo> years when the program evolves. It also doesn't tell me if
>
> That's why you should implement xml import/export mechanism and use
> the xml file as the "canonical" data, while the pickle is only a cache
> for the data.

Would make the program too complex, unless it is done by a library. I
actually prefer saving only once and doing that in fast, reliable way.

>
>     Ilpo> How can it work automatically in separate module? Replacing
>     Ilpo> the re.compile with something sounds possible way of getting
>     Ilpo> the regexps, but how and where to store the compiled data?
>     Ilpo> Is there a way to put it to the byte code file?
>
> Do what you already did - dump the regexp cache to a separate file. 

That didn't get all of the regexps. It only got the regexps that were
loaded in the time I dumped the cache.

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From news at NOwillmcguganSPAM.com  Wed Apr 20 11:20:17 2005
From: news at NOwillmcguganSPAM.com (Will McGugan)
Date: Wed, 20 Apr 2005 16:20:17 +0100
Subject: random number between 0 and 20
In-Reply-To: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
References: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>
Message-ID: <42667332$0$2593$da0feed9@news.zen.co.uk>

aleksander.helgaker at gmail.com wrote:
> How can I generate a random number between 0 - 20 and store the number
> in nrrandom?
> 

Assuming its inclusive..

 >>> from random import randint
 >>> nrrandom = randint(0,20)

Will McGugan
-- 
http://www.willmcgugan.com
"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c 
in "jvyy*jvyyzpthtna^pbz" ] )


From invalidemail at aerojockey.com  Fri Apr  1 11:18:46 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 1 Apr 2005 08:18:46 -0800
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com>
Message-ID: <1112372326.896298.251020@g14g2000cwa.googlegroups.com>

Peter Otten wrote:
> To confuse a newbies and old hands alike, Bengt Richter wrote:
>
> > Need something more straightforward, e.g., a wrapped one-liner:
> >
> >  >>> def guess(n=3): print ("You're right!", 'No more tries for
> >  >>> you!!!')[n-1 in
> >  ...    (x for x in xrange(n) for t in [raw_input('Guess my name:
> >  ')=='Ben']
> >  ...    if not t or iter([]).next())]
> >  ...
> >  >>> guess()
>
> To make it a bit clearer, a StopIteration raised in a generator
expression
> silently terminates that generator:
>
> >>> def stop(): raise StopIteration
> ...
> >>> list(i for i in range(10) if i < 5 or stop())
> [0, 1, 2, 3, 4]
>
> In a list comprehension, on the other hand, it is propagated:
>
> >>> [i for i in range(10) if i < 5 or stop()]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 1, in stop
> StopIteration
>
> Is that an intentional difference?


Very interesting.  I'm not sure if the designers even considered this
particular subtlety.  Why it happens is pretty plain.  In the generator
expression case, the generator expression does propogate the
StopIteration, but list() traps it.  List comprehensions are internally
treated as a for-loop (kind of), which doesn't trap StopIteration.
Maybe it should.

The list comprehension [ x for x in y ] is currently treated as
equivalent to the following, with byte-code optimizations:

. _ = []
. for x in y:
.     _.append(x)


Perhaps it ought to be equivalent to:

. _ = []
. try:
.     for x in y:
.         _.append(x)
. except StopIteration:
.     pass


However, I would guess the Python gods wouldn't approve of this use of
StopIteration, and so would make no sacrifices to get it.
Nevertheless, it seems likely to be how a list comprehension would
behave in Python 3.0, so maybe we should do it.


-- 
CARL BANKS



From bill.mill at gmail.com  Thu Apr 14 10:55:36 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Thu, 14 Apr 2005 10:55:36 -0400
Subject: Compute pi to base 12 using Python?
In-Reply-To: <7xoeci3ygi.fsf@ruckus.brouhaha.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<7xoeci3ygi.fsf@ruckus.brouhaha.com>
Message-ID: <797fe3d405041407554b049e03@mail.gmail.com>

On 13 Apr 2005 19:05:01 -0700, Paul Rubin
<"http://phr.cx"@nospam.invalid> wrote:
> Dick Moores <rdm at rcblue.com> writes:
> > I don't believe GNU "bc" is available for Windows, is it?
> 
> I don't know.  It probably works ok under Cygwin at least.

bc definitely works on cygwin, and is available at
http://gnuwin32.sourceforge.net/packages/bc.htm for windows. Make sure
you download both the dependencies and the binary package for it to
work. I put the dll from the dependancy archive in c:/winnt/system32
and it worked.

It should be noted that running the win32 bc from cygwin messed up my
terminal, so I recommend running it from a cmd window (which worked
fine).

Peace
Bill Mill
bill.mill at gmail.com


From cam.ac.uk at mh391.invalid  Thu Apr 28 11:28:13 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 28 Apr 2005 16:28:13 +0100
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <W47ce.375$Jb6.363@fe63.usenetserver.com>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
Message-ID: <d4qveg$5k6$1@gemini.csx.cam.ac.uk>

Paul Miller wrote:

 > I see lambda is "going away", so I want to use something that will be 
 > around for awhile.
 >
 > All I want to do is provide an "inline function" as an argument to
 > another function.

That's what lambda does. But it's going away, you'll have to use def 
when it does, unless the language designers come up with something better.

> For example, let's say I have a function which binds a key to a function 
> call. I want to do something "simple" in this function call, and I have 
> a lot of bindings, so I don't want to have a ton of tiny little 
> functions scattered around:
> 
>     def setVarTo1():
>         foo.var = 1
>     def setVarTo2():
>         foo.var = 2
> 
>     bind('a', setVarTo1)
>     bind('b', setVarTo2)

If a lot of the bindings are actually setting variables, you could do 
something like this:

def attrsetter(obj, name, 1):
     def _return_func(value):
         return setattr(obj, name, value)

     return _return_func

> Instead, I'd like to do something like this:
> 
>     bind('a', foo.var = 1)
>     bind('b', foo.var = 2)

bind('a', attrsetter(foo, "var", 1))
bind('a', attrsetter(foo, "var", 2))
-- 
Michael Hoffman


From mauriceling at acm.org  Mon Apr 11 18:38:30 2005
From: mauriceling at acm.org (Maurice LING)
Date: Tue, 12 Apr 2005 08:38:30 +1000
Subject: The convenient compiler for Python Apps and Distribution of it
References: <1113251280.923895.51860@l41g2000cwc.googlegroups.com>
	<1113251773.394507.88960@o13g2000cwo.googlegroups.com>
Message-ID: <d3eu97$it2$1@domitilla.aioe.org>

fred.dixon wrote:

> google for cx_freeze
> nevermind, here
> http://starship.python.net/crew/atuining/cx_Freeze/
> linux and windows
> 

Thanks. I think the question is really asking "is there an application 
that can compile standalone python applications in various platforms?" 
That is, is it possible to built a standalone python application in OSX 
that runs on Windows, for example?

I've not used Freeze or cx_freeze before but my assumption is that it 
can only build a sourceless package for its own platform. That is, if I 
run it on OSX, then my built package is only for OSX. My assumption 
comes from the fact that in cx_freeze, there isn't a "Python 
distribution", so it seems to be bootstrapping the python system from 
the host platform. Please correct me if I'm wrong...

Cheers
Maurice


From sjmachin at lexicon.net  Wed Apr 27 20:30:48 2005
From: sjmachin at lexicon.net (John Machin)
Date: Thu, 28 Apr 2005 10:30:48 +1000
Subject: Trigraph Idiom - Original?
References: <1114644362.854156.317830@l41g2000cwc.googlegroups.com>
Message-ID: <mv90715himp5bgsaptf1kjm1s10j5b40pl@4ax.com>

On 27 Apr 2005 16:26:02 -0700, "Jeff  Winkler" <winkler1 at gmail.com>
wrote:

>I've come up with a trigraph idiom, am curious if it's been done before
>(probably). I like to use trigraphs occasionally.
>
>Scenario: I'm doing an RSS->Javascript conversion for our intranet. I'd
>like to use different CSS class if a post is new. Code:
>
>hoursOld=abs(time.time()-time.mktime(i.modified_parsed))/3600
>cssClass=['rssLink','rssLinkNew'][hoursOld<12]
>entry='<a href="%s" class="%s" target="detail">%s</a>' %
>(cssClass,i['link'],i['title'])
>
>So, ['rssLink','rssLinkNew'] is index by boolean value- False:0, or
>True:1.
>
>I realize many will find this hideous, but 3 lines of code to do
>something simple seems equally bad. Thoughts? Is there a better way?

1. You appear to be conflating "trigraph" [a truly hideous
little-known lexical feature of C] and "ternary operator".

2. No, it's not original; the idea of using a boolean value as index
to an array of 2 elements probably occurred to somebody at about the
time that subroutines were invented. Look at the threads that break
out periodically in this newsgroup: "why doesn't python have a ternary
operator", "why doesn't 'foo and bar or zot' work sometimes" etc etc
-- it usually gets a mention.

3. Some might say it is hideous, but perhaps less hideous than (a)
using "i" as a reference to data other than a loop index (b) being so
worried about the longevity of your keyboard and/or thumb(s) that you
hit the spacebar only once or twice (other than inside string
literals) in three statements.

4. In the 3rd statement, you appear at best to have gravely misleading
variable names -- cssClass is shoved into the href="%s" but i['link']
is shoved into the class="%s" -- or worse, a stuffup.





From bogus@does.not.exist.com  Wed Apr  6 10:45:02 2005
From: bogus@does.not.exist.com ()
Date: Wed, 06 Apr 2005 14:45:02 -0000
Subject: (no subject)
Message-ID: <mailman.51.1572218384.3356.python-list@python.org>

#! rnews 4875
Newsgroups: comp.lang.python
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From: Harry George <harry.g.george at boeing.com>
Subject: Re: Best editor?
X-Nntp-Posting-Host: cola2.ca.boeing.com
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References: <1112725379.514651.66540 at l41g2000cwc.googlegroups.com>
Mime-Version: 1.0
Date: Wed, 6 Apr 2005 14:22:57 GMT
Xref: news.xs4all.nl comp.lang.python:371122

"ChinStrap" <caneff at gmail.com> writes:

> When not using the interactive prompt, what are you using? I keep
> hearing everyone say Emacs, but I can't understand it at all. I keep
> trying to learn and understand why so many seem to like it because I
> can't understand customization even without going through a hundred
> menus that might contain the thing I am looking for (or I could go
> learn another language just to customize!).
> 
> Personally I like SciTE, it has everything I think a midweight editor
> should: code folding, proper python support, nice colors out of the
> box, hotkey access to compile (I'm sure emacs does this, but I couldn't
> figure out for the life of me how), etc.
> 
> Opinions on what the best is? Or reading I could get to maybe sway me
> to Emacs (which has the major advantage of being on everyone's system).
> 

The key (as others have said) is to know your editor and be effective
with it.  As long as it can handle ASCII, does autoindent, and knows
tab-is-4-chars, then it is a viable choice.

Since you asked specifically about emacs, and whether or not it is
worthwhile...

I've used emacs for 15 years, and am still learning useful new tricks
at a rate of about one per 6 months.  But I've also found that the
essentials can be taught in a 2 hour session and mastered in about 2
weeks of use.  I've taught dozens of people using this "Essential
Emacs" approach.  

We find that emacs is for people who will be doing serious editing all
day long (e.g., programmers).  I like that comment from another
poster: "Emacs is a good place to live, but I wouldn't want to visit
there."

For people who will just be editing an occassional file (and no python
code), we recommend notepad or nedit.

Now then, how do we use emacs?

1. Proper setup is essential.  Assuming you have python-mode.el and
.elc in emacs's program-modes dir, then your .emacs needs:

;---python---------------------------
(load "python-mode")
(setq auto-mode-alist
      (cons '("\\.py$" . python-mode) auto-mode-alist))
(setq interpreter-mode-alist
      (cons '("python" . python-mode)
            interpreter-mode-alist))
(autoload 'python-mode "python-mode" "Python editing mode." t)
(add-hook 'python-mode-hook 'turn-on-font-lock)
(setq python-mode-hook 'python-initialise)
(defun python-initialise ()
  (interactive)
  (setq default-tab-width 4)
  (setq indent-tabs-mode nil)
)


2. I almost never use the interactive prompt.  There are people here
who do, but as soon as the script is more than a couple lines long, it
takes longer to reenter the code (even copy-and-paste) than to
edit-save-run a dummy batch script.  When I'm doing Extreme
Programming with such people, I insist on using a stopwatch and
checking which approach is more efficient -- they usually come over to
my approach.

3. I run emacs with split windows:
a) Edit the working code
b) Edit the unittest code
c) Run a shell script, where I (re)run the "go_test" script by doing
alt-p ret

In another frame (same emacs process, different frame) I keep the
oracle (known good) and test outputs in split windows, and maybe do
ediff-buffers on them if the deltas are not obvious.   

For each module under consideration (view or edit), I use a separate
emacs process in a similar manner.  In normal work, that means 1-4
emacs processes running, each with its own shell and own test cycles.

4. Elsewhere I'm running emacs rmail all day, and run emacs gnus several
times a day (like now).

5. When I do Extreme Programming, the other author(s) tend to be using
emacs, vim, or nedit.  We don't let people use notepad for python
becuause it doesn't know proper formatting.  IDE's tend to want to own
the whole show, which makes cross-tool Extreme Programming a pain.

As long as the other programmers have set their editors for
auto-indention and tab-is-4-chars, then we get along fine.  [I do
notice a sizeable delay when vim people search for the appropriate
shell windows, instead of having them in a (joined-at-the-hip) split
window.  This has more to do with bookkeeping than with editors per
se, but it is a data point.]

6. On IDE's and code-completion: If you are going to be typing the
same thing over and over, why not use a function, or maybe code
generation?

-- 
harry.g.george at boeing.com
6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From vegeta.z at gmail.com  Tue Apr  5 07:48:35 2005
From: vegeta.z at gmail.com (vegetax)
Date: Tue, 05 Apr 2005 07:48:35 -0400
Subject: Python Google Server
References: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>
Message-ID: <d2ttqp$e7k$1@sea.gmane.org>

it works on opera and firefox on linux, but you cant search in the cached
google! it would be more usefull if you could somehow search "only" in the
cache instead of putting the straight link. maybe you could put a magic url
to search in the cache, like search:"search terms"

fuzzyman at gmail.com wrote:

> I've hacked together a 'GoogleCacheServer'. It is based on
> SimpleHTTPServer. Run the following script (hopefully google groups
> won't mangle the indentation) and set your browser proxy settings to
> 'localhost:8000'. It will let you browse the internet using google's
> cache. Obviously you'll miss images, javascript, css files, etc.
> 
> See the world as google sees it !
> 
> (This is actually an 'inventive' short term measure to get round a
> restrictive internet policy at work :-) I'll probably put it in the
> Python Cookbook as it's quite fun (so if line lengths or indentation is
> mangled here, try there). Tested on Windows XP, with Python 2.3 and IE.
> 
> 
> 
> # Copyright Michael Foord, 2004 & 2005.
> # Released subject to the BSD License
> # Please see http://www.voidspace.org.uk/documents/BSD-LICENSE.txt
> 
> # For information about bugfixes, updates and support, please join the
> Pythonutils mailing list.
> # http://voidspace.org.uk/mailman/listinfo/pythonutils_voidspace.org.uk
> # Comments, suggestions and bug reports welcome.
> # Scripts maintained at http://www.voidspace.org.uk/python/index.shtml
> # E-mail fuzzyman at voidspace.org.uk
> 
> import google
> import BaseHTTPServer
> import shutil
> from StringIO import StringIO
> import urlparse
> 
> __version__ = '0.1.0'
> 
> 
> """
> This is a simple implementation of a server that fetches web pages
> from the google cache.
> 
> It lets you explore the internet from your browser, using the google
> cache.
> 
> Run this script and then set your browser proxy settings to
> localhost:8000
> 
> Needs google.py (and a google license key).
> See http://pygoogle.sourceforge.net/
> and http://www.google.com/apis/
> """
> 
> cached_types = ['txt', 'html', 'htm', 'shtml', 'shtm', 'cgi', 'pl',
> 'py']
> google.setLicense(google.getLicense())
> googlemarker = '''<i>Google is not affiliated with the authors of this
> page nor responsible for its
>
content.</i></font></center></td></tr></table></td></tr></table>\n<hr>\n'''
> markerlen = len(googlemarker)
> 
> class googleCacheHandler(BaseHTTPServer.BaseHTTPRequestHandler):
>     server_version = "googleCache/" + __version__
>     cached_types = cached_types
>     googlemarker = googlemarker
>     markerlen = markerlen
> 
>     def do_GET(self):
>         f = self.send_head()
>         if f:
>             self.copyfile(f, self.wfile)
>             f.close()
> 
>     def send_head(self):
>         """Common code for GET and HEAD commands.
> 
>         This sends the response code and MIME headers.
> 
>         Return value is either a file object (which has to be copied
>         to the outputfile by the caller unless the command was HEAD,
>         and must be closed by the caller under all circumstances), or
>         None, in which case the caller has nothing further to do.
> 
>         """
>         print self.path
>         url = urlparse.urlparse(self.path)[2]
>         dotloc = url.find('.') + 1
>         if dotloc and url[dotloc:] not in self.cached_types:
>             return None     # not a cached type - don't even try
> 
>         thepage = google.doGetCachedPage(self.path)
>         headerpos = thepage.find(self.googlemarker)
>         if headerpos != -1: # remove the google header
>             pos = self.markerlen + headerpos
>             thepage = thepage[pos:]
> 
>         f = StringIO(thepage)
> 
>         self.send_response(200)
>         self.send_header("Content-type", 'text/html')
>         self.send_header("Content-Length", str(len(thepage)))
>         self.end_headers()
>         return f
> 
>     def copyfile(self, source, outputfile):
>         shutil.copyfileobj(source, outputfile)
> 
> 
> def test(HandlerClass = googleCacheHandler,
>          ServerClass = BaseHTTPServer.HTTPServer):
>     BaseHTTPServer.test(HandlerClass, ServerClass)
> 
> 
> if __name__ == '__main__':
>     test()
> 




From dcrespo at gmail.com  Wed Apr 27 10:35:51 2005
From: dcrespo at gmail.com (dcrespo)
Date: 27 Apr 2005 07:35:51 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <116v872cjudbbd8@corp.supernews.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
	<116tf7lm0ivnl6c@corp.supernews.com>
	<1114600746.599172.163730@o13g2000cwo.googlegroups.com>
	<116v872cjudbbd8@corp.supernews.com>
Message-ID: <1114612551.280006.307190@g14g2000cwa.googlegroups.com>

If you see carefully, that question was for you too, because the reply
is at the same level as the one that says "Aaaaaaand: which do you
prefer?" :)

Daniel



From fredrik at pythonware.com  Tue Apr 12 07:26:54 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 13:26:54 +0200
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de><ec6dnbne_Lf_zcbfRVn-tA@comcast.com><1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<425bac0d.185429854@news.oz.net>
Message-ID: <d3gb47$1lk$1@sea.gmane.org>

Bengt Richter wrote:

> But isn't bool supposed to be a singleton class/type ?
>
> >>> [bool(x) for x in 0, 0.0, [], {}, False]
> [False, False, False, False, False]
> >>> [id(bool(x)) for x in 0, 0.0, [], {}, False]
> [505014288, 505014288, 505014288, 505014288, 505014288]

"False" is an ordinary global object, not an object factory or a singleton class.

</F> 





From mcherm at mcherm.com  Fri Apr  1 14:37:53 2005
From: mcherm at mcherm.com (Michael Chermside)
Date: Fri,  1 Apr 2005 11:37:53 -0800
Subject: string goes away
Message-ID: <20050401113753.2hhq78s8z7nocwoo@mcherm.com>

Andreas Beyer writes:
> Yeeh, I was expecting something like that. The only reason to
> use map() at all is for improving the performance.  That is
> lost when using list comprehensions (as far as I know). So,
> this is *no* option for larger jobs.

Skip Montanaro replied:
> Did you test your hypothesis?
>
>    % python -m timeit -s 'lst = ["abc"*10]*1000 ; import string'
'map(string.upper, lst)'
>    100 loops, best of 3: 3.72 msec per loop
>    % python -m timeit -s 'lst = ["abc"*10]*1000' '[s.upper() for s in lst]'
>    100 loops, best of 3: 2.23 msec per loop

Andreas Beyer writes:
> OK, you won. I read in an (regretably old) guidline for improving
> Python's performance that you should prefer map() compared to list
> comprehensions. Apparently the performance of list comprehensions has
> improved a lot, which is great.

If the lesson you learned here was that list comprehensions are at
least as fast as list comprehensions, then you've learned the wrong
lesson.

The REAL lesson here is that you shouldn't follow any "optimization"
rules without actually testing them. If you don't have time to test,
then just don't optimize... write whatever is most readable. If you
NEED more speed, then profiling and testing will show you what to
fix. (Using a better algorithm is a different story... do that
whenever you need it.)

-- Michael Chermside



From bearophileHUGS at lycos.com  Sat Apr 23 21:15:34 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 23 Apr 2005 18:15:34 -0700
Subject: Bounding box on clusters in a 2D list
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
Message-ID: <1114305334.875783.235380@f14g2000cwb.googlegroups.com>

I hope this is what you need, sometimes understanding the question is
one of the hardest parts :-)

If you can use a graph data structure, you can create a graph, and then
you can find the lenght of all its connected components (indentations
reduced to 2 spaces):

. def mat2graph(g, m, good=None, w=1):
. 	"Function docs..."
.   g.clear()
.   if m and isinstance(m, (list, tuple)):
.     if good != None:
.       m = [[good(e) for e in row] for row in m]
.     maxy = len(m)-1
.     maxx = len(m[0])-1
.     add = g.addBiArc
.     for y, row in enumerate(m):
.       for x, e in enumerate(row):
.         if e:
.           g.addNode((x,y)) # Necessary for isolated nodes.
.           if x>0 and m[y][x-1]: add( (x,y), (x-1,y), w=w)
.           if x<maxx and m[y][x+1]: add( (x,y), (x+1,y), w=w)
.           if y>0 and m[y-1][x]: add( (x,y), (x,y-1), w=w)
.           if y<maxy and m[y+1][x]: add( (x,y), (x,y+1), w=w)
.
. from graph import Graph
. g = Graph()
. m = [[1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0],
.      [1,1,1,0,1,1,0,0,0,0,0,1,1,1,1,0,0,0],
.      [1,1,1,0,1,1,1,0,1,1,0,1,1,1,0,0,0,0],
.      [0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0]]
. mat2graph(g, m)
. print map(len, g.connectedComponents())

Something similar to mat2graph will probably become a method of Graph.
A quite similar program can be used for other python graph libraries.

If you cannot use a graph data structure, of if you need to go faster,
you can use a flood fill algorithm tuned for this problem:


. def connected(m, foreground=1, background=0):
.   def floodFill4(m, r,c, newCol, oldCol):
.     """Simplest 4-connected flood fill algorithm, there are much
.     faster non-recursive ones. I've modified this from:
.     http://www.student.kuleuven.ac.be/~m0216922/CG/floodfill.html"""
.     if c>=0 and c<maxc and r>=0 and r<maxr and m[r][c]==oldCol:
.       m[r][c] = newCol
.       floodFill4(m, r+1, c, newCol, oldCol)
.       floodFill4(m, r-1, c, newCol, oldCol)
.       floodFill4(m, r, c+1, newCol, oldCol)
.       floodFill4(m, r, c-1, newCol, oldCol)
.
.   maxr = len(m)
.   maxc = len(m[0])
.   newCol = 2
.   oldCol = foreground
.   for r in xrange(maxr):
.     for c in xrange(maxc):
.       if m[r][c] == oldCol:
.         floodFill4(m, r,c, newCol=newCol, oldCol=oldCol)
.         newCol += 1
.   # Frequences, this can be become a standard python command
.   freq = {}
.   for row in m:
.     for e in row:
.       if e in freq:
.         freq[e] += 1
.       else:
.         freq[e] = 1
.   del freq[background]
.   return freq.values()
.
. m = [[1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0],
.      [1,1,1,0,1,1,0,0,0,0,0,1,1,1,1,0,0,0],
.      [1,1,1,0,1,1,1,0,1,1,0,1,1,1,0,0,0,0],
.      [0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0]]
. print connected(m)


There are much faster ways to do flood fills:
http://www.codeproject.com/gdi/QuickFill.asp
I think Python PIL doesn't support flood fills, and I think doing it
with Numarray is slower, and it's useful only to reduce the used
memory.
This connected program is slow and raw, and it uses recursivity a lot,
so it can crash the interpreter. You can use a data structure to
implement the stack yourself, to speed this program up. But for small
matrices I think this connected is enough ^_^

Bear hugs,
Bearophile



From hancock at anansispaceworks.com  Sun Apr 10 23:12:19 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 10 Apr 2005 22:12:19 -0500
Subject: Thoughts on some stdlib modules
In-Reply-To: <d3c88t$r27$1@sea.gmane.org>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<425999BD.7050308@v.loewis.de> <d3c88t$r27$1@sea.gmane.org>
Message-ID: <200504102212.19392.hancock@anansispaceworks.com>

On Sunday 10 April 2005 05:14 pm, Fredrik Lundh wrote:
> I'm not talking about things that absolutely have to be in the Python
> interpreter core; I'm talking about things that *could* be bundled
> with the standard distribution, *without* having to be relicensed,
> or be forever maintained by the CPython developers.
> 
> (the Linux distributors know how to do this: look for good stuff that's
> either actively maintained or simple and solid enough to live for a while,
> make sure the licenses are good enough, bundle the latest and greatest
> version, ship tested versions at regular intervals, update when necessary,
> and pass bugs and patches upstream.  why not use the same approach
> for Python's standard distribution?)

That sounds like a suggestion that there should be a "greater python"
distribution --- python itself, the standard libraries (now released together
as the "python distribution"), and the most commonly used Python
packages (which presumeably would include the current free PIL, Numeric (or
Numarray more likely), and so on.

One might argue that Linux distributions are already doing this -- Debian
does something like it, for example.  But there would be a greater cross-
platform consistency if such a super-distribution existed.  I can imagine
it would be particularly valuable to Windows users who can't benefit from
the Linux packaging operations.

I guess the other thing to compare to is something like SciPy, which is
a kind of specialized distribution of Python for scientific applications.

Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From joerg.schuster at gmail.com  Tue Apr 26 11:19:43 2005
From: joerg.schuster at gmail.com (Joerg Schuster)
Date: 26 Apr 2005 08:19:43 -0700
Subject: compile shebang into pyc file
Message-ID: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>

Hello,

is there a way to compile a python file foo.py to foo.pyc (or foo.pyo)
such that foo.pyc can be run with 'foo.pyc' (as opposed to 'python
foo.pyc') on the command line?

J?rg Schuster



From mefjr75 at hotmail.com  Wed Apr 27 03:26:16 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 27 Apr 2005 00:26:16 -0700
Subject: about Frame.__init__(self)
References: <d4ne89$iqe$1@mail.cn99.com>
Message-ID: <1114586776.618359.63840@g14g2000cwa.googlegroups.com>

Hello ,
I am no expert on tkinter but this seems like an inheritance question.
When you define a class that inherits from something ( Frame ) and you
define an __init__ in your class you have to explicitly call the
__init__ of your base class.

class xxx(base):
    """ This class doesn't have an __init__ defined.
        base.__init__ is called instead
    """
    def method_a(self):
        pass

class xxx(base):
    """ This class defines an __init__ and has to
        explicitly call the base.__init__
    """
    def __init__(self):
        """Python calls me if I am defined"""
        base.__init__(self)

You will see this in more than GUI code, it is part of Python's OO
design.
I first saw this in some threading code , thru me for a loop too ;)
search strategy:
Python OO
Python inheritance
etc...
hth,
M.E.Farmer

yang wrote:
> I just a newbie of python
> Now I found that almost every program use Tkinter have this line
>
> class xxx(xxx):
>      """xxxxx"""
>
>      def __init__(self):
>          """xxxxx"""
>
>          Frame.__init__(self)
>          .....................
>          .......
>
>
> the line "Frame.__init__(self)" puzzle me.
> why use it like this?
> can some one explain it?
> regards,
> yang



From sidharth.kuruvila at gmail.com  Fri Apr  8 17:45:01 2005
From: sidharth.kuruvila at gmail.com (Sidharth Kuruvila)
Date: Sat, 9 Apr 2005 03:15:01 +0530
Subject: Declaring variables from a list
In-Reply-To: <1163d88e.0504081255.438fbb96@posting.google.com>
References: <1163d88e.0504081255.438fbb96@posting.google.com>
Message-ID: <2ab2ed5505040814454b087df1@mail.gmail.com>

Python has a builtin function called locals which returns the local
context as a dictionary

>>> locals = locals()
>>> locals["a"] = 5
>>> a
5
>>> locals["a"] = "changed"
>>> a
'changed'

On 8 Apr 2005 13:55:39 -0700, Cactus <le_cactus at msn.com> wrote:
> Hi,
> 
> If I got a list is it possible to declare a variable from the items in that list?
> 
> Code Sample:
> Blob = ['Var1', 'Var2', 'vAR3']
> i = 5
> for listitems in Blob:
>     i += 1
>     listitems = i
> 
> print Var1
> 6
> print Var2
> 7
> print vAR3
> 8
> 
> Something like that? This doesn't work (obviously) but is there a way to do this?
> 
> TIA,
> Cacti
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
http://blogs.applibase.net/sidharth


From rhamph at gmail.com  Wed Apr  6 13:20:16 2005
From: rhamph at gmail.com (Rhamphoryncus)
Date: 6 Apr 2005 10:20:16 -0700
Subject: Using weakrefs instead of __del__
Message-ID: <1112808016.630995.87690@l41g2000cwc.googlegroups.com>

I know __del__ can't be relied on to do cleanup, so I'm thinking of
using a globally reachable weakref to do the job, like so:

import weakref

class Foo:
  def __init__(self, *args, **kwargs):
    self.__realfoo = RealFoo(self, *args, **kwargs)
  def blah(self):
    return self.__realfoo.blah()

class RealFoo:
  refs = set()
  def __init__(self, front):
    self.refs.add(weakref.ref(front, self.cleanup))
  def blah(self):
    print "Blah!"
  def cleanup(self, ref):
    print "Doing cleanup"
    self.refs.remove(ref)

Is there any reason why this wouldn't work?  Can it be used as a
general replacement for anything that needs __del__?  Even in Jython or
other alternative implementations?

Some issues I know about:
 * The weakref must be globally reachable (as I do with the above code)
to make sure it doesn't get deleted at the same time Foo does, because
python would not call the callback if that were the case.
 * I can't use any getattr tricks to wrap .blah() because Foo().blah()
would only use a  method bound to RealFoo, thus allowing Foo to be
deallocated and .cleanup() to be called before the method itself is.
Unfortunately my metaclass-fu is too weak to figure out something
without that problem.
 * I've no idea what will happen when the interpreter exits, but I
don't imagine it would matter much for most uses.

--
Adam Olsen, aka Rhamphoryncus



From ilias at lazaridis.com  Mon Apr 11 14:25:30 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Mon, 11 Apr 2005 21:25:30 +0300
Subject: [EVALUATION] - E03 - jamLang Evaluation Case Applied to Python
In-Reply-To: <d2mcra$ejm$1@usenet.otenet.gr>
References: <d2mcra$ejm$1@usenet.otenet.gr>
Message-ID: <d3efej$fie$1@usenet.otenet.gr>

Ilias Lazaridis wrote:
> [EVALUATION] - E02 - Support for MinGW Open Source Compiler
> http://groups-beta.google.com/group/comp.lang.python/msg/f5cd74aa26617f17
> 
> -
> 
> In comparison to the E02 thread, now a more practical one.
> 
> -
> 
> Here is a simple evaluation template (first part) which can be applied 
> to the Python language:
> 
> http://lazaridis.com/case/lang/index.html

the new template allows you to enter the information in a form and to 
submit it conveniently:

http://lazaridis.com/case/lang/index.html

> If you like, please post the most elegant solutions (either to sections 
> or to the whole document).
> 
> I will collect the results and write them down in a document, which will 
> compare python with other languages.
> 
> This document can serve as an flash-start (for people which simply like 
> to take a look on python).
> 
> http://lazaridis.com/case/lang/python.html
> 
> -
> 
> You can see the ruby version here (which shows some limitations, which 
> python can hopefully overcome):
> 
> http://lazaridis.com/case/lang/ruby.html

.

-- 
http://lazaridis.com


From greg at cosc.canterbury.ac.nz  Thu Apr  7 06:36:25 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 07 Apr 2005 22:36:25 +1200
Subject: richcmpfunc semantics
In-Reply-To: <mailman.1443.1112810784.1799.python-list@python.org>
References: <mailman.1443.1112810784.1799.python-list@python.org>
Message-ID: <3bkgpnF6d50ppU1@individual.net>

harold fellermann wrote:
> 
> richcmpfunc compare(PyObject *,PyObject, int);
> 
> I supposed the two objects passed are the ones to be compared.

Yes.

> What is the meaning of the integer argument? Does it specify the kind
> of comparision operator (e.g. __eq__ or __le__), and if so, how?


             <   0 	
             	
             <=  1 	

             ==  2 	

             !=  3 	
            	
             >   4
          	
             >=  5


> What is my richcmpfunc supposed to return? 0 or 1 indicating False or
> True?

In the usual case, yes, although it can return any
Python object. Rich comparison doesn't impose any
semantics on the operations -- this is one of the
reasons for its existence.

> What has to be done, if the function is invoked for an operator
> I don't want to define?

Return Py_NotImplemented. (Note that's return, *not* raise.)

> Maybe there is some good documentation available, but I cannot find it.

I found most of this out by reading the source, I think.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From draghuram at gmail.com  Tue Apr 26 10:54:22 2005
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 26 Apr 2005 07:54:22 -0700
Subject: How to start python interactively from python script?
References: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>
	<hdht8uq4.fsf@python.net>
Message-ID: <1114527262.232766.31770@z14g2000cwz.googlegroups.com>

Thank you. 'os.environ["PYTHONINSPECT"] = "1"' does the job.

Raghu.



From kent37 at tds.net  Sun Apr 24 23:24:48 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 24 Apr 2005 23:24:48 -0400
Subject: Multiple tuples for one for statement
In-Reply-To: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>
Message-ID: <426c5ea7$1_1@newspeer2.tds.net>

Harlin Seritt wrote:
> I have three tuples of the same size: tup1, tup2, tup3
> 
> I'd like to do something like this:
> 
> for a,b,c in tup1, tup2, tup3:
>    print a
>    print b
>    print c

Presuming that you want a,b,c to be corresponding entries from the three tuples, then zip() is your 
friend:
for a,b,c in zip(tup1, tup2, tup3):
   ...

Kent


From kent37 at tds.net  Thu Apr 21 21:21:41 2005
From: kent37 at tds.net (Kent Johnson)
Date: Thu, 21 Apr 2005 21:21:41 -0400
Subject: Dictionary question.
In-Reply-To: <1114129715.038945.227200@o13g2000cwo.googlegroups.com>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
	<1114129715.038945.227200@o13g2000cwo.googlegroups.com>
Message-ID: <42684d5b$1_3@newspeer2.tds.net>

hawkesed wrote:
> Actually,
>   I think I got it now. Here is what I did:
> 
>>>>for num in alist:
> 
> ... 	if adict.has_key(num):
> ... 		x = adict.get(num)
> ... 		x = x + 1
> ... 		adict.update({num:x})

A simpler way to do this last line is
adict[num] = x

> ... 	else:
> ... 		adict.update({num:1})
and
adict[num] = 1

Kent


From mage at mage.hu  Wed Apr 20 05:26:25 2005
From: mage at mage.hu (Mage)
Date: Wed, 20 Apr 2005 11:26:25 +0200
Subject: goto statement
In-Reply-To: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
Message-ID: <42662041.7050302@mage.hu>

praba kar wrote:

>Dear All,
>
>   In Python what is equivalent to goto statement
>
>  
>
You shouldn't use goto in high-level languages.

       Mage




From jerf at jerf.org  Fri Apr  1 16:54:39 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 16:54:39 -0500
Subject: decorator syntax polling suggestion
References: <d11dcfba.0408121252.7690a43a@posting.google.com>
	<411BF3FC.71051A6F@alcyone.com>
	<CISdnRfssu4lrIHcRVn-ow@powergate.ca>
	<mailman.1588.1092379795.5135.python-list@python.org>
	<pan.2004.08.13.20.15.22.544894@jerf.org>
Message-ID: <pan.2005.04.01.21.54.39.839887@jerf.org>

On Fri, 01 Apr 2005 16:52:52 -0500, Jeremy Bowers wrote:
Oops, sorry, some "send later" messages I thought were gone got sent.
Sorry. Didn't mean to revive dead threads.



From auch-ich-m at g-kein-spam.com  Tue Apr  5 13:21:01 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Tue, 05 Apr 2005 19:21:01 +0200
Subject: re module non-greedy matches broken
References: <mailman.1325.1112651826.1799.python-list@python.org>
	<1155e6kak0ufk60@corp.supernews.com>
Message-ID: <7426741.asbeVpWDNU@news.perlig.de>

* lothar wrote:

As already said by Georg, regexes are the wrong tool for such tasks, but
anyway...

> give an re to find every innermost "table" element:

<table(?:\s[^>]*)?>[^<]*(?:<(?!/table>|table(?:\s[^>]*)?>)[^<]*)*</table>

> give an re to find every "pre" element directly followed by an "a"
> element:

<pre(?:\s[^>]*)?>[^<]*(?:<(?!/pre>|pre(?:\s[^>]*)?>)[^<]*)*</pre>(?=<a[\s>])

The are written more common than needed for your samples. Depending on the
data to be expected, they can be written a bit shorter, but this is left as
an exercise for the reader.

HTH, nd


From bokr at oz.net  Tue Apr 19 06:35:47 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 10:35:47 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<4262e25b.207992156@news.oz.net>
	<1113799727.299053.138010@f14g2000cwb.googlegroups.com>
	<42634e5c.235641494@news.oz.net>
	<1113894992.556496.73510@f14g2000cwb.googlegroups.com>
Message-ID: <4264c4bc.331481375@news.oz.net>

On 19 Apr 2005 00:16:32 -0700, "Kay Schluehr" <kay.schluehr at gmx.net> wrote:

>
>Bengt Richter wrote:
>
>[...]
>
>> Um, I think that's too narrow for where. Consider
>>
>>     foo = f1; bar=f2; x=k1; y=k2
>>     foo(x)*bar(y)[3].attr
>>
>> now should
>>
>>     foo(x)*bar(y)[3].attr where:
>>         foo = f1; bar=f2; x=k1; y=k2
>
>I think we are diverging again. You are right with Your objection about
>my claim of generality but I'm completely against the latter statement
>not only because
>
>foo(x) where:
>   foo = f1
>
>is not much better than
>
>foo(x) where:
>   def foo():
>       # do some stuff
>
>which should clearly raise an exception and be abandoned.

Why do you say that? foo(x) is just a call of whatever foo is bound to.
The where: suite supplies a transient namespace where foo happens to
be defined in the conventional way. This allows definition and call of
foo without binding it in the caller's local namespace, much like
    (lambda(): do_some_stuff)()

IMO that's a perfectly valid use. You don't have to worry that your
def foo():... will clobber some other foo.

>
>After all I start backtracking: the purpose of defining suites is still
>prevention of namespaces pollution with helper-functions not a sake of
>it's own and not inventing of a suite-based programming style for
>everything. The examples You presented have become almost pathological
>examples of what should be prevented and where syntax cannot be rigid
>enough.
You don't have to write what you consider to be pathological, but
this becomes sort of a free speech issue. I.e., don't impose a style-censoring
spell-checker on me please ;-)

>
>So there are following requierements about we seem to agree:
>
>- define suites on a functions-call scope in order to define helper
>functions
>  that would otherwise pollute external namespaces
Why just function call? You realize that a "function call" is just the
effect of (<arglist>) tacked on the tail of an expression that is not
necessarily just a name. E.g., notice the possibilities the parser goes
through before finding that foo() is a simple name expression with a () trailer:

[ 1:18] C:\pywk\parse\ast>py24 debg.py -full foo()
'file_input'
  'stmt'
    'simple_stmt'
      'small_stmt'
        'expr_stmt'
          'testlist'
            'test'
              'and_test'
                'not_test'
                  'comparison'
                    'expr'
                      'xor_expr'
                        'and_expr'
                          'shift_expr'
                            'arith_expr'
                              'term'
                                'factor'
                                  'power'
                                    'atom'
                                      NAME 'foo'
                                    'trailer'
                                      LPAR '('
                                      RPAR ')'
      NEWLINE ''
  ENDMARKER ''

What about instance.method(args) as a call? Should you not be
able  write
           instance.method(*args) where:
              args = []
              # append various values to args here,
              # in single statements and/or using looping etc.

to specify complex args in a where? That looks like

[ 2:18] C:\pywk\parse\ast>py24 debg.py -full instance.method(*args)
'file_input'
  'stmt'
    'simple_stmt'
      'small_stmt'
        'expr_stmt'
          'testlist'
            'test'
              'and_test'
                'not_test'
                  'comparison'
                    'expr'
                      'xor_expr'
                        'and_expr'
                          'shift_expr'
                            'arith_expr'
                              'term'
                                'factor'
                                  'power'
                                    'atom'
                                      NAME 'instance'
                                    'trailer'
                                      DOT '.'
                                      NAME 'method'
                                    'trailer'
                                      LPAR '('
                                      'arglist'
                                        STAR '*'
                                        'test'
                                          'and_test'
                                            'not_test'
                                              'comparison'
                                                'expr'
                                                  'xor_expr'
                                                    'and_expr'
                                                      'shift_expr'
                                                        'arith_expr'
                                                          'term'
                                                            'factor'
                                                              'power'
                                                                'atom'
                                                                  NAME 'args'
                                      RPAR ')'
      NEWLINE ''
  ENDMARKER ''

What about other expressions that can retrieve a callable whose arguments you might want to compute
with logic? My bet is that neither of us can predict what pain an arbitrary restriction on natural
consequences of a good orthogonal grammar change will do. In another post I did sketch out a grammar
mod that prevents a whole bunch of nonsense such as continue where ... (and I'm not sure I caught all
true silliness), but I would rather not restrict for pure style reasons. Obviously the BDFL went the
style-restrictive way with decorator expressions, since functionally any expression after the '@'
which returned a callable taking a function as its first argument could have been allowed.
I agree (after some mixed feelings ;-) about that in the decorator case, but I think where-functionality
is much more general.


>
>- mark the func-call-scope by some keyword either "with" or "where"
>because
>  it has to be separated from the calling environment both for
>consistency
>  and user friendlyness
Not sure what you mean by func-call scope, but I assume you are referring to
what is created by processing the where suite.

The way I have been thinking of this for where is to translate

     <tiny_stmt> where <wheresuite>

to
     def uniquetmp(): # return dict with bindings created in wheresuite
        <where-suite>
        return vars()
     
     exec_with_shadowing_name_space( uniquetmp(), <tiny_stmt> )

IOW, the idea is to execute the tiny_stmt normally, except that any names accessed
will first be looked up in the dict returned by uniquetmp(), and if not found there
will go on to the normal local space of tiny_stmt and then to its globals.

Thunks are tricky, because while bound in the where suite namespace, their code bodies
share the namespace outside of the where scope.

I think I can implement the functionality with a combination of import-time AST rewriting
and byte code hacks, but I am not sure I want to expend the energy doing that. Better to
expend it getting set up to do real experimental changes. But I need to upgrade a bunch
of stuff to do that ;-/

>
>- Simple matching rules for both keyword-parameters and
>argument-tuples.
This almost suggests source-level macro processing to me, which is _NOT_ what
where is about. "Matching" in my view is not textual, it happens dynamically at run time
and names not supplied will cause run time name errors, not syntax errors.

>  Make explicit which kind of inference rule is selected.
I'm not sure what this means ;-)

>
>I think that my last proposal I finally distilled from our discussion
>would pretty much fullfill all three requirements whereas that of
>Andrey Tatarinov would be somewhat more restrictive and fullfills only
>the first two. 
Maybe you could summarize it as a concrete grammar change? That would help
make it clear. I enjoy this ping pong, but it takes up a lot of time ;-)

Regards,
Bengt Richter


From mynews44 at yahoo.com  Thu Apr 28 13:54:33 2005
From: mynews44 at yahoo.com (googleboy)
Date: 28 Apr 2005 10:54:33 -0700
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <EYednbmZKbHHZ_LfRVn-gA@comcast.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
Message-ID: <1114710873.292998.128090@f14g2000cwb.googlegroups.com>

I'd be just such a newbie; I don't understand why it would matter if I
left the book instance referencing itself....

However these wonderful responses have gotten me a very long way
towards my goal.  I just have a couple of quick questions.

firstly,  I am trying hard to figure out how to create a new file with
the list rather than print to standard out.  I haev done this:

    for book in books:
        print book # just to be sure it works as I expect
        sort1 = open(r'D:\path to\sort1.csv', 'w+')
        print >> sort1, book
        sort1.close()

and this creates the file as I expect, however it creates it populated
with only the information of the final book in the sorted list. I am
guessing I need to figure out how to append as part of this loop,  but
the only info I have found so far suggests this should append by
default....?

Secondly,  I am wondering how I can get a search algorithm that will
search by multiple fields here,  so that I can (as one example) sort
the books out by author and then date,  to present a list of the book
grouped by authors and having each group presented in a chronological
order,   or by author and title, grouping all the books up into authors
presenting each group alphabetically by title.  Or by publisher and
date,  or by publisher and code....

I have tried things like

books.sort(key = operator.attrgetter("author"), key =
operator.attrgetter("title") and
books.sort(key = operator.attrgetter("author", "title")

but they both give errors.

Is this where using cmd functions instead of keys becomes necessary?

Thanks!

googleboy



From chernyshevsky at hotmail.com  Thu Apr 14 20:48:45 2005
From: chernyshevsky at hotmail.com (Chung Leong)
Date: Thu, 14 Apr 2005 20:48:45 -0400
Subject: Web Application Client Module
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
	<9LGdnTRlLP76GcHfRVn-qA@comcast.com>
	<d3m8g1$uec$1@news2.zwoll1.ov.home.nl>
Message-ID: <NqSdnVVo0rNwksLfRVn-3Q@comcast.com>


"Henk Verhoeven" <news1 at phppeanutsREMOVE-THIS.org> wrote in message
news:d3m8g1$uec$1 at news2.zwoll1.ov.home.nl...
> Chung Leong wrote:
> >
> > It's easy. Just create an application that hosts the MSHTML ActiveX
control
> > (IE itself minus the interface). With tools like Delphi or Visual Basic,
> > it's literally a matter of dragging and dropping the control into the
form.
> > Even in Visual C++ it's not that hard.
> >
> Hi Chung ,
>
> Of coure i want to ship my personal browser with my products too :-),
> but will this be immune to those popup blockers?

Third party extensions are not loaded by the MSHTML control, so it wouldn't
be affected by pop-up blockers--or spyware for that matters. WinXP SP2's
popup blocker is controlled by something known as IInternetSecurityManager,
whose behavior you can override by implementing your own.




From roman.yakovenko at gmail.com  Thu Apr 14 00:25:35 2005
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Thu, 14 Apr 2005 06:25:35 +0200
Subject: Freezing python application
In-Reply-To: <see-414FAA.23143013042005@news.frontiernet.net>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
	<see-414FAA.23143013042005@news.frontiernet.net>
Message-ID: <7465b61705041321255cebadc4@mail.gmail.com>

Hi. I would like to freeze python application on linux. There are a
few tools that make the job to be done:
    freeze ( comes with python )
    cx_Freeze
Gordon McMillan's installer


Is it possible to freeze python application on linux in such way that
it doesn't depends on python installed on cu


From vze4rx4y at verizon.net  Fri Apr  1 19:21:09 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 02 Apr 2005 00:21:09 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net>
Message-ID: <Vzl3e.267$7b.220@trndny02>

> I assumed that all standard sequence consumers (including list, of course)
would intercept
> the StopIteration of a sequence given them in the form of a generator
expression, so your
> lyst example would have an analogue for other sequence consumers as well,
right?
> I.e., there's not a hidden list(genex) in those others I would hope ;-)

Right.



> E.g., "in" in my toy exposed more clearly, using Peter's stop:
>
>  >>> def show(x): print x,; return x
>  ...
>  >>> def stop(): raise StopIteration
>  ...
>  >>> 2 in (x for x in xrange(5) if show(x)<4 or stop())
>  0 1 2
>  True
>  >>> 7 in (x for x in xrange(5) if show(x)<4 or stop())
>  0 1 2 3 4
>  False
>
> BTW I notice that this also nicely shortcuts when the 2 is found.

That's a fact.


Raymond




From vze4rx4y at verizon.net  Fri Apr  1 18:04:42 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 01 Apr 2005 23:04:42 GMT
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi> <kLg3e.203$7b.56@trndny02>
	<424dc33c.55623752@news.oz.net>
Message-ID: <esk3e.1612$4b.185@trndny09>

[Bengt Richter]
> I wonder if a dict with a general override hook for hashing all keys would be
useful.
> E.g.,  a dict.__keyhash__ that would take key as arg and default as now
returning key.__hash__()
> but that you could override. Seems like this could potentially be more
efficient than key wrappers,
> and would also make it so you wouldn't have to chase all the affected methods
in doing an idict
> like the above (e.g., get, setdefault, update etc. etc.)

There has also been a discussion of adding a seqdict that maintains a keys in
insertion order.  Another idea was to have a defaultdict that could be
instructed to create values as necessary (either zero for counting or [] for
list building).  Putting the three ideas together, perhaps we should write an
extension module with a custom dictionary type with methods/attributes
implementing those ideas.  Essentially, the thought is to put all the bells and
whistles in one place.  If the extension became popular, it could ultimately
wend its way into the collections module.

A facetious naming idea would be to call it TrickyDict, a relative to DictMixin
and no relation to a former U.S. president ;-)

t = TrickyDict()
t.keytransform(str.lower)
t['abC'] = 1                  # case insensitive dictionary
assert t['Abc'] == 1

t = TrickyDict()
t.setdefaultvalue(0)
t['x'] += 1                     # very bag like
assert t['x'] == 1

t = TrickyDict()
t.setdefaultfunction(list)
t['x'] += ['first']          # rather like: t.setdefault('x',
[]).append('first')
t['x'] += ['second']
assert t == {'x': ['first', 'second']}

t = TrickyDict()
t.sortedkeys = True
t['x'] = 1
t['y'] = 2
assert t.keys() == ['x', 'y']   # order is guaranteed

This universal dictionary type could also incorporate some methods for other
recurrent themes such as a inverting a dictionary:

    def invdict(self)
        return self: dict((v,k) for k,v in self.iteritems()).

For the performance minded, there could also be a control for dictionary
speed/space efficiency:

t = TrickyDict()
t.maxkeydensity = 40          # resize whenever the dictionary is more than 40%
full

Taken together, these six attributes/methods could cover many wished for
features for the 10% of the cases where a regular dictionary doesn't provide the
best solution.


Raymond




From ajikoe at gmail.com  Fri Apr 22 05:43:37 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 22 Apr 2005 02:43:37 -0700
Subject: pylab strange error message
Message-ID: <1114163017.679476.155940@l41g2000cwc.googlegroups.com>

I found this error message when I import pylab.

from pylab import *

Error message:
Microsoft Visual C++ Runtime Library
Assertion failed!
Program:c\python24\python.exe
File:CXX/cxx_extentions.cxx
Line:1031

Expression: ob_refcnt == 0
For information on how your program can cause an assertion
failure, see the Visual C++ documentation on asserts



First I install in new computer python 2.4.1
then the error comes out.

So I tried to reinstall with python 2.4
The problem still comes.

Please help

Pujo



From shane at hathawaymix.org  Wed Apr 27 11:55:28 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Wed, 27 Apr 2005 09:55:28 -0600
Subject: PyGTK vs. wxPython
In-Reply-To: <1114616192.342452.178720@o13g2000cwo.googlegroups.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>	<mailman.2580.1114613011.1799.python-list@python.org>
	<1114616192.342452.178720@o13g2000cwo.googlegroups.com>
Message-ID: <426FB5F0.4010206@hathawaymix.org>

Szabolcs Nagy wrote:
> it's not quite true since the latest stable release (2.6.0.0)
> 
> see the new wx doc (it's generated with epydoc so it's not for C++):
> http://www.wxpython.org/docs/api/
> 
> i used wxPython with XRCed a few times and i liked the way it works
> (worked under linux and win as well for me)

+1.  I've had a lot of success with XRCed, but no success with wxGlade.
 The UI in XRCed needs polish but it's easy enough to use.  Also,
wxGlade wants to spew generated Python code, while XRCed generates a
nice resource file that wx can load easily.

Shane


From bh at intevation.de  Wed Apr 20 12:14:04 2005
From: bh at intevation.de (Bernhard Herzog)
Date: Wed, 20 Apr 2005 18:14:04 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<s9zu0m1mpry.fsf@thetis.intevation.de>
	<87fyxlqwct.fsf@wilson.rwth-aachen.de>
Message-ID: <s9z7jixmnn7.fsf@thetis.intevation.de>

Torsten Bronger <bronger at physik.rwth-aachen.de> writes:

>> http://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF
>
> I see only one argument there: "Inclusion of the upper bound would
> then force the latter to be unnatural by the time the sequence has
> shrunk to the empty one."  While this surely is unaesthetical, I
> don't think that one should optimise syntax according to this very
> special case.

The other main argument for startig at 0 is that if you do not include
the upper bound and start at 1 then the indices i of a sequence of N
values are 1 <= i < N + 1 which is not as nice as 0 <= i < N. 
opportunity for an off by one error.

Then there's also that, starting at 0, "an element's ordinal (subscript)
equals the number of elements preceding it in the sequence."


   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From sjmachin at lexicon.net  Fri Apr  8 19:36:50 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 09 Apr 2005 09:36:50 +1000
Subject: unknown encoding problem
References: <d361u0$152$1@news2.rz.uni-karlsruhe.de>
Message-ID: <m03e51ljq9ejkoi9gc21flmi56n8n8h7fp@4ax.com>

On Fri, 08 Apr 2005 15:45:35 +0200, Uwe Mayer <merkosh at hadiko.de>
wrote:

>Hi,
>
>I need to read in a text file which seems to be stored in some unknown
>encoding. Opening and reading the files content returns:
>
>>>> f.read()
>'\x00 \x00 \x00<\x00l\x00o\x00g\x00E\x00n\x00t\x00r\x00y\x00...
>
>Each character has a \x00 prepended to it. I suspect its some kind of
>unicode - how do I get rid of it? 
>

Interesting attitude. Why do you want to "get rid of it"? Have you
considered investigating the source of this suspicious text? You never
know, there could be something really interesting in there, like
'\x00v\x00o\x00n\x00 \x04\x1c\x04>\x04A\x04:\x042\x040\x00
\x00m\x00i\x00t\x00 \x00L\x00i\x00e\x00b' :-)

> str.replace('\x00', '')

Why not go the whole hog:

''.join([c for c in foreign_text if 32 <= ord(c) <= 126 or c in
'\t\r\n'])

Alternatively, try embracing Unicode -- it's the way forward, and it's
not that difficult.


From tjreedy at udel.edu  Tue Apr 19 15:31:38 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 19 Apr 2005 15:31:38 -0400
Subject: Twisted for online games
References: <1113851977.195434.78980@l41g2000cwc.googlegroups.com>
	<cdvoeca3m0a.fsf@kielo.uta.fi>
Message-ID: <d43m2u$ggv$1@sea.gmane.org>


"Petri Lankoski" <ccpela at kielo.uta.fi> wrote in message 
news:cdvoeca3m0a.fsf at kielo.uta.fi...
> "sir.shz" <sir.shz at gmail.com> writes:
>> Hi, I'm just starting to play with Twisted, and planning to use it for
>> sone online games (e.g., casino games, etc.), have people done that
>> before, are there any pointers? Thanks.
>
> "Game Programming with Python" by Sean Riley has good section about
> writing server-client stuff using Twisted.

There is also an active, focused pygame mailing list (also accessible via 
gmane).  I believe some posters there have mentioned using twisted.

Terry J. Reedy





From fphsml at gmail.com  Mon Apr 25 16:12:16 2005
From: fphsml at gmail.com (James)
Date: 25 Apr 2005 13:12:16 -0700
Subject: ANN: PyDev 0.9.3 released
In-Reply-To: <OSbbe.306$461.263@newssvr11.news.prodigy.com>
References: <42261366.3020602@esss.com.br><424C2A8E.9030104@esss.com.br>
	<mailman.2479.1114451614.1799.python-list@python.org>
	<OSbbe.306$461.263@newssvr11.news.prodigy.com>
Message-ID: <1114459936.454063.242790@z14g2000cwz.googlegroups.com>

It does for me. I just installed through it.

http://pydev.sourceforge.net/updates/

I am having some other problems though. When I run it, I get ...

sys:1: DeprecationWarning: Non-ASCII character '\x90' in file
C:\Python24\python.exe on line 1, but no encoding declared; see
http://www.python.org/peps/pep-0263.html for details
  File "C:\Python24\python.exe", line 1
    MZ?$,000$0 0
n.pdbA?330??3?::0?3??3?
      ^

It is reading python.exe as a text source file. I must have configured
something off.



From jerf at jerf.org  Fri Apr  1 20:48:24 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 20:48:24 -0500
Subject: FAM and Python? (was Re: How To Do It Faster?!?)
References: <mailman.1216.1112400155.1799.python-list@python.org>
Message-ID: <pan.2005.04.02.01.48.19.412235@jerf.org>

On Sat, 02 Apr 2005 02:02:31 +0200, andrea_gavana wrote:

> Hello Jeremy & NG,
> Every user of thsi big directory works on big studies regarding oil fields.
> Knowing the amount of data (and number of files) we have to deal with (produced
> by simulators, visualization tools, and so on) and knowing that users are
> usually lazy in doing clean up of unused/old files, this is a way for one
> of us to "fast" scan all the directories and identify which files belong
> to him. Having them in an organized, size-sorted wxPython list, the user
> can decide if he want to delete some files (that almost surely he forgot
> even that they exist...) or not. It is easy as a button click (retrieve
> the data-->delete the files).

Got it. A good idea!

>>Here's an idea to sort of come at the problem from a different angle. Can
>>you run something on the file server itself, and use RPC to access it?
> 
> I don't even know what is RPC... I have to look at it.

RPC stands for "remote procedure call". The idea is that you do something
that looks like a normal function call, except it happens on a remote
server. Complexity varies widely.

Given your situation, and if running something on the UNIX server is a
possibility, I'd recommend downloading and playing with Pyro; it is Python
specific, so I think it would be the best thing for you, being powerful,
well integrated with Python, and easy to use.

Then, on your client machine in Windows, ultimately you'd make some sort
of call to your server like

    fileList = server.getFileList(user)

and you'd get the file list for that user, returning whatever you want for
your app; a list of tuples, objects, whatever you want. Pyro will add no
constraints to your app.

> I am not sure if my new explanation fits with your last information... as
> above, I didn't even know about fam... I've read a little, but probably
> I am too newbie to see a link between it and my scope. Do you think it exists?
> It would be nice to have something that tracks the file status on all the
> file system, but probably is a LOT of work wrt what my app should be able
> to do.

Maybe, maybe not. I've never used FAM. Perhaps someone who has can chime
in about the ease of use; I've changed the subject to try to attract such
a person. It also depends on if FAM works on your UNIX.

My point is that you can do one scan at startup (can't avoid this), but
then as the file system monitor tells you that a change has occurred, you
update your data structures to account for the change. That way, your data
is always in sync. (For safety's sake, you might set the server to
terminate itself and re-start every night.) Since it's always in sync, you
can send this data back instead of scanning the file system.

At this point, my suggestion would be to consider whether you want to
spend the effort to speed it up like this, which is something only you
(and presumably your managers) are in a position to know, given that you
have an existing tool (at least, you seem to speak like you have a
functional tool). If you do, then I'd take some time and work a bit with
Pyro and FAM, and *then* re-evaluate where you stand. By then you'll
probably be able to ask better questions, too, and like I said above,
perhaps someone will share their experiences with FAM.

Good luck, and have fun; seriously, that's important here.


From mahs at telcopartners.com  Mon Apr  4 23:53:15 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Mon, 04 Apr 2005 20:53:15 -0700
Subject: Unexpected result when comparing method with variable
In-Reply-To: <20050405033441.GA15819@arno2>
References: <20050405033441.GA15819@arno2>
Message-ID: <d2t223$5kf$1@sea.gmane.org>

David Handy wrote:
> I had a program fail on me today because the following didn't work as I
> expected:
> 
> 
>>>>class C:
> 
> ...     def f(self):
> ...         pass
> ...
> 
>>>>c = C()
>>>>m = c.f
>>>>m is c.f
> 
> False
> 
> I would have expected that if I set a variable equal to a bound method, that
> variable, for all intents and purposes, *is* that bound method, especially
> since I hadn't changed or deleted anything on the class or its instance.
> 
> The same thing happens when attempting to compare an unbound method with a
> variable name bound to that unbound method:
> 
> 
>>>>M = C.f
>>>>M is C.f
> 
> False
> 
> If I were to guess what is going on here, I would say that the expression
> c.f invokes a descriptor that manufactures a brand new "method object" each
> time.  

Yes, I believe that's the case.  See Martelli's recent 'Black Magic' PyCon 
presentation for some details of what's going on, but IIRC, the essence is that 
a bound method is produced by calling __get__ on the function, with the 
class/instance as the argument

The problem is, this is non-intuitive (to me) and prevented me from
> doing something I thought was useful.

Agreed that:
  >>> class C(object):
  ...     def f(self):pass
  ...
  >>> C.f is C.f
  False

is surprising
> 
> My use case is deferring operations till later, by placing tuples of a
> method and its arguments in a list to be processed at some future time, but
> doing some special-case processing only for certain methods:
> 
> deferred = []
> ...
> deferred.append((c.f, ('abc', 123)))
> 
> ...
> 
> for method, params in deferred:
>     method(*params)
>     if method is c.f:
>         # handle a special case
> 
> But I can't do that special-case handling this way, I have to resort to some
> other means to identify a method, "method is c.f" is always False. Which
> seems strange to me.

Another workaround is to compare method.im_func which does pass the identity test
...
> 
> If I complain about this, would I get any sympathy? ;)
> 
Sympathy, sure ;-)

> 
Michael



From jerf at jerf.org  Fri Apr  1 17:37:17 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 17:37:17 -0500
Subject: Help with splitting
References: <1112394051.064413.250990@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.04.01.22.37.16.957649@jerf.org>

On Fri, 01 Apr 2005 14:20:51 -0800, RickMuller wrote:

> I'm trying to split a string into pieces on whitespace, but I want to
> save the whitespace characters rather than discarding them.
> 
> For example, I want to split the string '1    2' into ['1','    ','2'].
> I was certain that there was a way to do this using the standard string
> functions, but I just spent some time poring over the documentation
> without finding anything.

importPython 2.3.5 (#1, Mar  3 2005, 17:32:12) 
[GCC 3.4.3  (Gentoo Linux 3.4.3, ssp-3.4.3-0, pie-8.7.6.6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> whitespaceSplitter = re.compile("(\w+)")
>>> whitespaceSplitter.split("1 2  3   \t\n5")
['', '1', ' ', '2', '  ', '3', '   \t\n', '5', '']
>>> whitespaceSplitter.split(" 1 2  3   \t\n5 ")
[' ', '1', ' ', '2', '  ', '3', '   \t\n', '5', ' ']

Note the null strings at the beginning and end if there are no instances
of the split RE at the beginning or end. Pondering the second invocation
should show why they are there, though darned if I can think of a good way
to put it into words.


From kay.schluehr at gmx.net  Tue Apr  5 03:54:25 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 5 Apr 2005 00:54:25 -0700
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <mailman.1361.1112684224.1799.python-list@python.org>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
Message-ID: <1112687665.297515.231430@o13g2000cwo.googlegroups.com>

Steve Holden wrote:

> You have several times mentioned the possibility of a decorator
taking
> more than one argument, but in my understanding of decorators this
just
> wouldn't make sense. A decorator should (shouldn't it) take precisely

> one argument (a function or a method) and return precisely one value
(a
> decorated function or method).

Yes. I think this sould be fixed into the minds of the people exacly
this way You state it:

When writing

@decorator(x,y)
def f():
    ....

not the so called "decorator" function but decorator(x,y) is the
decorating function and decorator(x,y) is nothing but a callable object
that takes f as parameter. A little correcture of Your statement: it is
NOT nessacary that a function or method will be returned from a
decorator.

def decorator(x,y):
    def inner(func):
        return x+y
    return inner

@decorator(1,2)
def f():pass

>>> f
3

This is perfectly valid allthough not very usefull ;)

Regards,
Kay



From strombrg at dcs.nac.uci.edu  Wed Apr 27 22:18:18 2005
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Thu, 28 Apr 2005 02:18:18 GMT
Subject: converting binary data
Message-ID: <pan.2005.04.28.02.18.16.575130@dcs.nac.uci.edu>


I've written up a page about how to convert native binary data to
another platform's native binary data, as I did some fortran data
conversions for a client.

The programs and documentation are at: 
http://dcs.nac.uci.edu/~strombrg/converting-binary.html

So far, the page includes a variety of programs written in C or python to
do:

1) A program for determining if your machine is big endian, little endian,
or something else

2) A program for swapping big endian to little endian, or vice versa, on
words of an arbitrary number of bytes, assuming a homogeneous size for all
items in the file

3) A pair of programs for converting a series of reals/floats to ascii and
back again (to be used in combination with ssh, rsh, &c)

4) An example program that converts binary data with variable length
records

5) A program that removes fortran record framing for big endian or little
endian, with arbitrary word size (must bew a multiple of 8 bits)


The documentation includes:

1) A taxonomy of three different kinds of conversions

2) Tips for determining record lengths

3) An admonition to reject these methods, and instead convert to a
platform-independent representation.  A list of common
platform-independent representations is given.


I hope someone will find this useful.



From danb_83 at yahoo.com  Fri Apr  1 06:30:49 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 1 Apr 2005 03:30:49 -0800
Subject: Combining digit in a list to make an integer
References: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>
Message-ID: <1112355049.196021.182720@g14g2000cwa.googlegroups.com>

Harlin Seritt wrote:
> I have the following:
>
> num1 = ['1', '4', '5']
>
> How can I combine the elements in num1 to produce an integer 145?


int(''.join(num1))



From irmen.NOSPAM at xs4all.nl  Tue Apr  5 05:22:00 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 05 Apr 2005 11:22:00 +0200
Subject: setup distributed computing for two computer only
In-Reply-To: <mailman.1313.1112643254.1799.python-list@python.org>
References: <1112634286.899245.107530@l41g2000cwc.googlegroups.com>	<42518a67$0$136$e4fe514c@news.xs4all.nl>	<1112642873.737256.186470@z14g2000cwz.googlegroups.com>
	<mailman.1313.1112643254.1799.python-list@python.org>
Message-ID: <425258b8$0$152$e4fe514c@news.xs4all.nl>

Heiko Wundram wrote:
> Am Montag, 4. April 2005 21:27 schrieb ajikoe at gmail.com:
> 
>><snip>
> 
> 
> Google for:
> 
> Python Remote Objects

^^^ what Heiko said :)

This is, assuming that the 'function' on the other computer
is implemented in Python too.

--Irmen


From mage at mage.hu  Sat Apr 23 09:53:17 2005
From: mage at mage.hu (Mage)
Date: Sat, 23 Apr 2005 15:53:17 +0200
Subject: Python or PHP?
In-Reply-To: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
Message-ID: <426A534D.1080002@mage.hu>

Lad wrote:

>Is anyone capable of providing Python advantages over PHP if there are
>any?
>  
>
I am also new to python but I use php for 4 years. I can tell:

- python is more *pythonic* than php
- python has its own perfume
http://www.1976.com.tw/image/trussardi_python_uomo.jpg  and it's nice.
php doesn't have any smell
- writing python programs you feel much better

check this: http://wiki.w4py.org/pythonvsphp.html

       Mage


From skip at pobox.com  Tue Apr 19 12:49:48 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 19 Apr 2005 11:49:48 -0500
Subject: XML-RPC -- send file
In-Reply-To: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
References: <1113921569.905111.155230@f14g2000cwb.googlegroups.com>
Message-ID: <16997.13996.9686.996258@montanaro.dyndns.org>


    codecraig> I thought i read somewhere that by using pickle or something,
    codecraig> that u could get a string representation of your object (or a
    codecraig> file in my case) and send that.  Any ideas?

Sure:

    stuff = xmlrpclib.Binary(open(somefile).read())
    server.call_some_remote_function(stuff)

At the other end a similar decoding will have to be done.

Skip

    


From nospam at nospam.com  Sat Apr 30 02:45:58 2005
From: nospam at nospam.com (Mark T)
Date: Fri, 29 Apr 2005 23:45:58 -0700
Subject: Python Challenge ahead [NEW] for riddle lovers
References: <d4u60o$akh$1@news2.netvision.net.il>
Message-ID: <LY2dneJUwv86tO7fRVn-rA@comcast.com>


"pythonchallenge" <pythonch at nospam.not.com> wrote in message 
news:d4u60o$akh$1 at news2.netvision.net.il...
> For the riddles' lovers among you, you are most invited to take part
> in the Python Challenge, the first python programming riddle on the net.
>
> You are invited to take part in it at:
> http://www.pythonchallenge.com

Excellent puzzles!  For others like this see http://www.osix.net.  I love 
these things :^)




From radam2_ at _tampabay.rr.com  Mon Apr 18 12:34:28 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Mon, 18 Apr 2005 16:34:28 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<3cc186F6lodv5U1@individual.net>
	<Pine.A41.4.61b.0504161340050.200502@dante76.u.washington.edu>
	<4261c943.136032804@news.oz.net> <3cf2qfF6jo33oU1@individual.net>
	<4262c4b2.200399789@news.oz.net> <3che4dF6o7el3U1@individual.net>
Message-ID: <60m761lp0fti2r2h14gjtok7i2pmqpp0m0@4ax.com>

On Mon, 18 Apr 2005 12:50:24 +0200, Reinhold Birkenfeld
<reinhold-birkenfeld-nospam at wolke7.net> wrote:

>y = (f(11, 22, x=1, y='y for f') *
>     g(*args_from_somewhere,
>       x='x for g', y='y for g',
>       foo=lambda: return 'foo for g'))
>
>would be my current way to express this. But still, the less lines,
>the less confusing it is.

I would probably do it this way.

y = f(11, 22, x=1, y='y for f') 		\
         * g( *args_from_somewhere,
              x='x for g', 
              y='y for g',
              foo=lambda: return 'foo for g' )

I tend to put the opperators on the left for continued lines. It's
nice visual que to whats happening.

if (a==1 
        or b==2 
        or c==3):
    x = ( 1.333333333333
      	+ the_last_value_i_needed
      	+ the_first_value_i_started_with
      	+ another_long_name_for_something )

This subject really hasn't been a problem for me. So I really don't
see the point of adding a new syntax. 

And this works on the def side.

def f( first, 
	   second,
	   x=0,
	   y='' ):
    #	
    # rest of body
    #

So is this new syntax just a way to keep the '()'s closer together?

Cheers,
Ron



From ville at spammers.com  Wed Apr 13 06:16:54 2005
From: ville at spammers.com (Ville Vainio)
Date: 13 Apr 2005 13:16:54 +0300
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
	<Xns9635A70671703sizernospamcom@216.40.28.87>
	<du7d5t0gxtz.fsf@lehtori.cc.tut.fi>
	<1113307867.975905.300380@l41g2000cwc.googlegroups.com>
	<mailman.1767.1113319471.1799.python-list@python.org>
	<1113329712.395343.246140@o13g2000cwo.googlegroups.com>
Message-ID: <du77jj7f0bt.fsf@lehtori.cc.tut.fi>

>>>>> "beliavsky" == beliavsky  <beliavsky at aol.com> writes:

    beliavsky> The key difference between the Unix approach and the
    beliavsky> MSH one is that rather than creating a "pipeline" based
    beliavsky> on textual input and output, MSH passes data between
    beliavsky> the various commandlets as arbitrary objects.

They clearly read my rant from last summer 

http://groups.google.com/groups?threadm=du7brj2mpg9.fsf%40mozart.cc.tut.fi

;-)

-- 
Ville Vainio   http://tinyurl.com/2prnb


From cjm_usenet at yahoo.co.nz  Fri Apr 29 01:40:45 2005
From: cjm_usenet at yahoo.co.nz (cjm_usenet at yahoo.co.nz)
Date: 28 Apr 2005 22:40:45 -0700
Subject: Non-anonymous function arguments
Message-ID: <1114753245.466162.253220@o13g2000cwo.googlegroups.com>

I had an idea for passing functions as arguments:
Allow a block syntax (like with class definition)
for keyword arguments, attached to a statement
that includes a function call but doesn't need
the block for something else (like loops and ifs).
Apologies for the contrived examples.

  squares = map(*):
    def function(x): return x*x
    list=[1,2,3]

  def odds_and_evens(list, on_odd, on_even):
    for i in list:
      if (i % 2 == 0):
        on_even(i)
      else:
        on_odd(i)

  odds_and_evens([1,2,3,4,5],*):
    def on_odd(i):
      print (i/2) " * 2 + 1"
    def on_even(i):
      print "2 * " (i/2)

  some_numbers=filter(*):
    sequence=[1,2,3,4,5]
    def function(x):
      return x > 2

  strange_list=sorted(["hello","world",7],*):
    def key(x):
      if (x==7):
        return "SEVEN"
      else:
        return upper(x)

Unlike with lambda, the functions have names.
The marker inside the function call helps make
it obvious where the keywords go, especially
if the statement contains multiple function
calls.
There could be a keyword before the colon:

  some_numbers=filter(*) using:
    sequence=[1,2,3,4,5]
    def function(x):
      return x > 2

The marker is an asterisk because it's like
doing footnotes, alternatives are a plus sign
and multiple asterisks.
-- 
Caspian Maclean



From bill.mill at gmail.com  Thu Apr  7 11:28:14 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Thu, 7 Apr 2005 11:28:14 -0400
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <3bjtvuF6d00nnU2@individual.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com> <4253fe0c$1@nntp0.pdx.net>
	<3bjtvuF6d00nnU2@individual.net>
Message-ID: <797fe3d40504070828ebaae22@mail.gmail.com>

On Apr 7, 2005 1:15 AM, Greg Ewing <greg at cosc.canterbury.ac.nz> wrote:
> Scott David Daniels wrote:
> > Aahz wrote:
> >
> >> You just can't have your cake and eat it, too.
> >
> > I've always wondered about this turn of phrase.  I seldom
> > eat a cake at one sitting.
> 
> You need to recursively subdivide the cake until
> you have a piece small enough to fit in your input
> buffer. Then the atomicity of the cake-ingestion
> operation will become apparent.
> 

+1 QOTW


From codecraig at gmail.com  Thu Apr 21 10:01:45 2005
From: codecraig at gmail.com (codecraig)
Date: 21 Apr 2005 07:01:45 -0700
Subject: Regular Expressions - Python vs Perl
Message-ID: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>

Hi,
  I am interested in regular expressions and how Perl and Python
compare.  Particulary, I am interested in performance (i.e. speed),
memory usage, flexibility, completeness (i.e. supports simple and
complex regex operations...basically is RegEx a strong module/library
in Python?)

  Anyone have any information on this?  Any numbers, benchmarks?

Thanks so much.  I know this is a python user group...but try to be has
un-biased as you can.



From kent37 at tds.net  Sun Apr 17 16:17:05 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sun, 17 Apr 2005 16:17:05 -0400
Subject: pydoc preference for triple double over triple single quotes--
 anyreason?
In-Reply-To: <mailman.2030.1113757909.1799.python-list@python.org>
References: <mailman.2008.1113679688.1799.python-list@python.org>	<42617449_3@newspeer2.tds.net>
	<mailman.2030.1113757909.1799.python-list@python.org>
Message-ID: <4262c00e$1_3@newspeer2.tds.net>

Brian van den Broek wrote:
> Kent Johnson said unto the world upon 2005-04-16 16:41:
> 
>> Brian van den Broek wrote:
>>> I've just spent a frustrating bit of time figuring out why pydoc 
>>> didn't extract a description from my module docstrings. Even though I 
>>> had a well formed docstring (one line, followed by a blank line, 
>>> followed by the rest of the docstring), when I ran Module docs, my 
>>> modules showed up as having "no description". ("Module docs" 
>>> referring to the shortcut installed on Windows that launches the 
>>> pydoc server.)
>>
>> ?? It works for me with triple-single quoted strings...from a quick 
>> look it appears that pydoc uses inspect which looks at the __doc__ 
>> attribute; do your modules have __doc__ attributes?
>>
> Kent, that's odd. My module does have a valid docstring and hence a 
> __doc__ attribute (I did explicitly check). help(my_module) works fine 
> at the prompt. It is just the results list in the TKinter interface to 
> the pydoc server application that doesn't seem to pick up my module's 
> description (in the first line of its docstring) when the docstring is 
> triple-single quoted.

I'm not sure what you mean by "the results list in the TKinter interface to the pydoc server". I ran 
the server, clicked "open browser" and browsed to a module in site-packages; that worked fine for me 
under Win2K and Python 2.4.1.

Kent


From ville at spammers.com  Wed Apr 27 06:00:55 2005
From: ville at spammers.com (Ville Vainio)
Date: 27 Apr 2005 13:00:55 +0300
Subject: names of methods, exported functions
References: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
Message-ID: <du74qds4jzc.fsf@lehtori.cc.tut.fi>

>>>>> "Mayer" == Mayer  <gmayer at cs.bgu.ac.il> writes:

    Mayer> Hello:

    Mayer> Is there a way to see at the python prompt the names of all
    Mayer> the public methods of a class or the names exported by a
    Mayer> module? I know that

If you use ipython, you can press <tab> after the period, e.g.

[~]|128> import re
[~]|129> re.<TAB>
re.DOTALL     re.MULTILINE  re.__all__    re.error      re.search
re.I          re.S          re.__doc__    re.escape     re.split
re.IGNORECASE re.U          re.__file__   re.findall    re.sub
re.L          re.UNICODE    re.__name__   re.finditer   re.subn
re.LOCALE     re.VERBOSE    re.compile    re.match      re.template
re.M          re.X          re.engine     re.purge      re.__class__
[~]|129> re.

ISTR the completion can be added to plain old python prompt as well,
through rlcompleter.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From martin.witte at gmail.com  Sat Apr 30 07:26:06 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 30 Apr 2005 04:26:06 -0700
Subject: date to digit
In-Reply-To: <mailman.57.1114858019.14961.python-list@python.org>
References: <mailman.57.1114858019.14961.python-list@python.org>
Message-ID: <1114860366.151336.162090@f14g2000cwb.googlegroups.com>

try time.strptime() , and then time.time() - see documentation
(http://docs.python.org/lib/module-time.html)



From steve at holdenweb.com  Tue Apr 12 15:59:22 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 15:59:22 -0400
Subject: singleton objects with decorators
In-Reply-To: <425bbc80.189640348@news.oz.net>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de><ec6dnbne_Lf_zcbfRVn-tA@comcast.com><1113300588.335527.26290@o13g2000cwo.googlegroups.com>	<425bac0d.185429854@news.oz.net>	<mailman.1748.1113305360.1799.python-list@python.org>
	<425bbc80.189640348@news.oz.net>
Message-ID: <d3h94b$9k0$1@sea.gmane.org>

Bengt Richter wrote:
[...]
> It's a weird beast, being a subtype of int also. I'll defer to the BDFL in
> http://www.python.org/peps/pep-0285.html
> 
> """
>     The values False and True will be singletons, like None.  Because
>     the type has two values, perhaps these should be called
>     "doubletons"?  The real implementation will not allow other
>     instances of bool to be created.
> """
> 
> Regards,
> Bengt Richter

It would probably make sense (IMHO) to deny rebinding of True and False 
in the same way that 2.4 denies rebinding of None. Given that people 
would set True and False themselves in order to make their pre-2.4 code 
readable, however, this may overstress backward compatibility.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From lbates at syscononline.com  Tue Apr 19 13:18:03 2005
From: lbates at syscononline.com (Larry Bates)
Date: Tue, 19 Apr 2005 12:18:03 -0500
Subject: [Python-Dev] How do you get yesterday from a time object
In-Reply-To: <mailman.2115.1113926313.1799.python-list@python.org>
References: <20050419153446.30407.qmail@web60116.mail.yahoo.com>
	<mailman.2115.1113926313.1799.python-list@python.org>
Message-ID: <foWdnX9xaJ2hoPjfRVn-tw@comcast.com>

Use datetime module if you are on 2.3 or 2.4, otherwise you
can do:

today=time.time()
yesterday=today-24*60*60  # 24 hours x 60 minutes x 60 seconds

Your problem is that time.localtime() converts to 9 value
tuple (you can't subtract seconds from a tuple).  You do
the math on today and convert using time.localtime after.

For future reference: Please post a copy of your traceback
instead of just saying "<-- generates and error".  It helps
people to respond more quickly and accurately.

-Larry Bates


Simon Brunning wrote:
> On 4/19/05, Ralph Hilton <flinkkettel at yahoo.com> wrote:
> 
>>i'm a beginning python programmer.
>>
>>I want to get the date for yesterday
>>
>>nowTime = time.localtime(time.time())
>>print nowTime.
>>oneDay = 60*60*24 # number seconds in a day
>>yday = nowTime - oneDay  # <-- generates an error
>>print yday.strftime("%Y-%m-%d")
> 
> 
> today = datetime.date.today()
> previous_working = today - datetime.timedelta(days=1)
> 


From michele.simionato at gmail.com  Thu Apr 28 10:00:32 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 28 Apr 2005 07:00:32 -0700
Subject: Getting a list of classes in the current module/auto
	introspection
In-Reply-To: <ytSdnWXt8PvGT-3fRVn-pw@comcast.com>
References: <ytSdnWXt8PvGT-3fRVn-pw@comcast.com>
Message-ID: <1114696832.950894.165810@z14g2000cwz.googlegroups.com>

Any class has a .__module__ attribute giving the name
of the module where the class was defined, so you
need something like

[c for c in globals() if inspect.isclass(c) and c.__module__ ==
"__main__"]

           Michele Simionato



From sjmachin at lexicon.net  Tue Apr 19 23:53:00 2005
From: sjmachin at lexicon.net (John Machin)
Date: Wed, 20 Apr 2005 13:53:00 +1000
Subject: Importing some functions from a py file
References: <mailman.2150.1113967029.1799.python-list@python.org>
Message-ID: <iakb6151f3qkbdgsk999i17ftdbm5344st@4ax.com>

On Tue, 19 Apr 2005 20:17:06 -0700 (PDT), Anthony Liu
<antonyliu2002 at yahoo.com> wrote:

>The choice is (b):
>
>(b) you do have "def main()" as per my example, but
>you have an unguarded "main()" at the top level
>
>Below is exactly what I have:
>
>def func1():
>    do_sth_1()
>
>def func2():
>    do_sth_2()
>
>def main():
>    do sth_m()
>#end of code1.py


If that's what you have, then main() won't be executed *EVER*, neither
when code1 is imported, nor when it is run as a script.

>
>So, you suggest that if I add to the end of code1.py
>module the following,
>
>if __name__ == "__main__":
>    main()
>
>I should be OK, right?
>
>

Maybe, nobody can tell WTF is going on from your descriptions :-( 


From greg at cosc.canterbury.ac.nz  Thu Apr  7 06:38:12 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 07 Apr 2005 22:38:12 +1200
Subject: Calling a Perl Module from Python ( future direction of Python)
In-Reply-To: <mailman.1448.1112812981.1799.python-list@python.org>
References: <mailman.1448.1112812981.1799.python-list@python.org>
Message-ID: <3bkgsvF6d50ppU2@individual.net>

gf gf wrote:
> Really!  That's a pity... Instead of trying to
> recreate a repository the size of CPAN, a Python
> interface to Perl modules is really called for.

When Parrot comes on line, this presumably will
become trivial...

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From michele.simionato at gmail.com  Wed Apr  6 00:20:22 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 5 Apr 2005 21:20:22 -0700
Subject: authentication in zope server & Python
In-Reply-To: <1112757783.673823.296330@f14g2000cwb.googlegroups.com>
References: <1112712052.977243.307630@o13g2000cwo.googlegroups.com>
	<1112757783.673823.296330@f14g2000cwb.googlegroups.com>
Message-ID: <1112761222.527651.224740@f14g2000cwb.googlegroups.com>

Not to be rude, but you are on the wrong list and your question is ill
formulated:


http://www.catb.org/~esr/faqs/smart-questions.html

http://www.zope.org/Resources/MailingLists

             Michele Simionato



From francescomoi at europe.com  Wed Apr 27 08:40:10 2005
From: francescomoi at europe.com (francescomoi at europe.com)
Date: 27 Apr 2005 05:40:10 -0700
Subject: "mysql.h: No such file or directory" when building MySQL-python
Message-ID: <1114605610.575160.39010@z14g2000cwz.googlegroups.com>

Hi.

I'm trying to build 'MySQL-python-1.2.0' on my Linux FC2:
----------------------------------
[ ]# export PATH=$PATH:/usr/local/mysql/bin/
[ ]# export mysqlclient=mysqlclient_r
[ ]# python setup.py clean
[ ]# python setup.py build
running build
running build_py
running build_ext
building '_mysql' extension
creating build/temp.linux-i686-2.3
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -march=i386
-mcpu=i686 -D_GNU_SOURCE -fPIC -fPIC -I/usr/include/python2.3 -c
_mysql.c -o build/temp.linux-i686-2.3/_mysql.o -I'/usr/include/mysql'
_mysql.c:41:19: mysql.h: No such file or directory
------------------------------------

I don't understand why I get this error message, since I usually build
MySQL+C programs
by using:
gcc -o myprogram -I'/usr/local/mysql/include/mysql'
-L'/usr/local/mysql/lib/mysql' -lmysqlclient -lz -lcrypt -lnsl -lm
myprogram.c

My server configuration:
---------------------------
[ ]# /usr/local/mysql/bin/mysql_config
	--cflags        [-I'/usr/local/mysql/include/mysql']
        --libs          [-L'/usr/local/mysql/lib/mysql' -lmysqlclient
-lz -lcrypt -lnsl -lm]
        --socket        [/tmp/mysql.sock]
        --port          [3306]
        --version       [3.23.58]
----------------------------
[ ]# find . -name "mysql.h"
./usr/src/php-4.3.10/ext/mysql/libmysql/mysql.h
./usr/src/mysql-3.23.58/include/mysql.h
./usr/src/mysql-4.1.9/include/mysql.h
./usr/include/mysql/mysql.h
./usr/local/mysql/include/mysql/mysql.h
------------------------------
[ ]# locate libmysqlclient
/usr/src/mysql-3.23.58/libmysql/.libs/libmysqlclient.so
/usr/src/mysql-3.23.58/libmysql/.libs/libmysqlclient.a
/usr/src/mysql-3.23.58/libmysql/.libs/libmysqlclient.so.10
/usr/src/mysql-3.23.58/libmysql/.libs/libmysqlclient.so.10.0.0
/usr/src/mysql-3.23.58/libmysql/.libs/libmysqlclient.lai
/usr/src/mysql-3.23.58/libmysql/.libs/libmysqlclient.la
/usr/src/mysql-3.23.58/libmysql/libmysqlclient.la
/usr/src/mysql-4.1.9/libmysql/.libs/libmysqlclient.so
/usr/src/mysql-4.1.9/libmysql/.libs/libmysqlclient.a
/usr/src/mysql-4.1.9/libmysql/.libs/libmysqlclient.so.14
/usr/src/mysql-4.1.9/libmysql/.libs/libmysqlclient.lai
/usr/src/mysql-4.1.9/libmysql/.libs/libmysqlclient.so.14.0.0
/usr/src/mysql-4.1.9/libmysql/.libs/libmysqlclient.la
/usr/src/mysql-4.1.9/libmysql/libmysqlclient.la
/usr/local/mysql/lib/mysql/libmysqlclient.la
/usr/local/mysql/lib/mysql/libmysqlclient.so.10.0.0
/usr/local/mysql/lib/mysql/libmysqlclient.so
/usr/local/mysql/lib/mysql/libmysqlclient.a
/usr/local/mysql/lib/mysql/libmysqlclient.so.10
----------------------------------

Any suggestion? Thank you very much.



From info at wingware.com  Mon Apr 25 00:44:31 2005
From: info at wingware.com (Wingware Announce)
Date: Mon, 25 Apr 2005 00:44:31 -0400 (EDT)
Subject: ANN: Wing IDE 2.0.3 released
Message-ID: <Pine.LNX.4.50.0504250043540.3169-100000@hedgehog>

Hi,

I'm happy to announce the release of Wing IDE version 2.0.3, an
advanced development environment for the Python programming
language.

This is a free upgrade for Wing IDE 2.0 users.  The release can
be downloaded from:

http://wingware.com/downloads

Wing IDE provides powerful debugging, editing, code intelligence,
and search capabilities that reduce development and debugging
time, cut down on coding errors, and make it easier to understand
and navigate Python code.

Highlights of this release include:

* New keyboard personality for OS X
* Debugging support for 64-bit Linux versions of Python
* Editor performance improvements

A complete list of changes is available here:

http://wingware.com/pub/wingide/2.0.3/CHANGELOG.txt

This release is available for Windows, Linux, and Mac OS X, and
can be compiled from sources on *BSD, Solaris, and other Posix
operating systems.

For more information see:

Product Info:   http://wingware.com/products
Sales:          http://wingware.com/store/purchase
Upgrades:       http://wingware.com/store/upgrade
  
Sincerely,

Stephan Deibel

--
Wingware
Wing IDE for Python
Advancing Software Development

www.wingware.com





From tdelaney at avaya.com  Wed Apr  6 21:33:48 2005
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 7 Apr 2005 11:33:48 +1000
Subject: Compiling extensions
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0252049C@au3010avexu1.global.avaya.com>

ake wrote:

> I would like to compile extensions usig distutils. is there a way to
> set which compiler to use ?
> 
> I am using windows and VC++ 7.1 comp.

python setup.py --help
python setup.py build --help

However, if you're using an installed version of VC++ 7.1 you shouldn't
need to set the compiler.

Tim Delaney


From fred.dixon at gmail.com  Sat Apr 16 10:07:28 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 16 Apr 2005 07:07:28 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <1113620769.916435.47130@o13g2000cwo.googlegroups.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
	<Xns963892E01D954duncanrcpcouk@127.0.0.1>
	<1113573592.248241.38550@z14g2000cwz.googlegroups.com>
	<Xns9639A1F15A98Bduncanrcpcouk@127.0.0.1>
	<1113620769.916435.47130@o13g2000cwo.googlegroups.com>
Message-ID: <1113660448.503656.228610@o13g2000cwo.googlegroups.com>

just read the ne stuuf. i went to DIP right after work anf found in
nice intro to unittest. not to bad (i thinK) now that I can see it work)



From harlinseritt at yahoo.com  Tue Apr 26 21:13:36 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 26 Apr 2005 18:13:36 -0700
Subject: Can .py be complied?
In-Reply-To: <426ec8f7_2@rain.i-cable.com>
References: <426ec8f7_2@rain.i-cable.com>
Message-ID: <1114564416.221686.54300@l41g2000cwc.googlegroups.com>

Hi monkey,

Not a stupid question especially if you're trying to create commercial
software and don't want to reveal your source. At any rate, you can use
py2exe to create a .exe file. It does have some cons to it since you
are compiling an interpreted script but it works fine in this capacity.
If you would like to obfuscate your code (disguise it) without an
executable you can try pyobfuscate as well. Just Google for these two
and you'll find easily.

Harlin Seritt



From mleeds at mlp.com  Tue Apr 12 17:53:26 2005
From: mleeds at mlp.com (Leeds, Mark)
Date: Tue, 12 Apr 2005 17:53:26 -0400
Subject: nested tuple slice
Message-ID: <54668D97C0199943A454516A5FF6481E58A993@EXCHUS001.AD.MLP.COM>

maybe list(tuple)[0:2])) will

get you what you

want  but I don't know how to

change it back to a tuple.

I'm just starting out but

I would be interested also.

 

                        mark

 

-----Original Message-----
From: python-list-bounces+mleeds=mlp.com at python.org
[mailto:python-list-bounces+mleeds=mlp.com at python.org] On Behalf Of
dimitri pater
Sent: Tuesday, April 12, 2005 5:49 PM
To: python-list at python.org
Subject: nested tuple slice

 

hello!

I want to change a nested tuple like:
tuple = (('goat', 90, 100), ('cat', 80, 80), ('platypus', 60, 800))
into:
tuple = (('goat', 90), ('cat', 80), ('platypus', 60))

in other words, slice the first elements of every index

Any ideas on how to do this in an elegant, pythonic way?

Best regards,
Dimitri




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From raghulj at gmail.com  Tue Apr  5 01:50:05 2005
From: raghulj at gmail.com (Raghul)
Date: 4 Apr 2005 22:50:05 -0700
Subject: monitoring folder in python
Message-ID: <1112680205.659755.211400@z14g2000cwz.googlegroups.com>

Is it possible to monitor a folder in the python?My question is if I
put any file in it that particular folder my script should monitor the
folder and read the file name.If so what function can I use?

Thanx in advance



From donn at u.washington.edu  Mon Apr 18 12:02:29 2005
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 18 Apr 2005 09:02:29 -0700
Subject: Strings and Lists
References: <d769864e.0504180342.426357d3@posting.google.com>
Message-ID: <donn-1C2836.09022918042005@gnus01.u.washington.edu>

In article <d769864e.0504180342.426357d3 at posting.google.com>,
 tomlongridge at gmail.com (Tom Longridge) wrote:

> My current Python project involves lots repeatating code blocks,
> mainly centred around a binary string of data. It's a genetic
> algorithm in which there are lots of strings (the chromosomes) which
> get mixed, mutated and compared a lot.
> 
> Given Python's great list processing abilities and the relative
> inefficiencies some string operations, I was considering using a list
> of True and False values rather than a binary string.
> 
> I somehow doubt there would be a clear-cut answer to this, but from
> this description, does anyone have any reason to think that one way
> would be much more efficient than the other? (I realise the best way
> would be to do both and `timeit` to see which is faster, but it's a
> sizeable program and if anybody considers it a no-brainer I'd much
> rather know now!)

I make no representations about how much mileage you would
get out of it, but if character data suits your purposes and
you just need a mutable array - in principle, I think it would
be more efficient to use an array.  Like,
   import array
   a = array.array('c', strdata)

As I understand it, this object simply contains character data,
not a list of 1 character string objects, so it's much more
economical to store and examine.

   Donn Cave, donn at u.washington.edu


From harlinseritt at yahoo.com  Sun Apr 24 20:24:18 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 24 Apr 2005 17:24:18 -0700
Subject: Parsing data from URL
Message-ID: <1114388658.276974.304720@f14g2000cwb.googlegroups.com>

I am trying to do the following:

<of course website.com is not the actual site>

import urllib

url = 'http://www.website.com/file.shtml'
dat = urllib.urlopen(url, 'r').read()
print dat

When I do so, I get the following data:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML><HEAD>
<TITLE>405 Method Not Allowed</TITLE>
</HEAD><BODY>
<H1>Method Not Allowed</H1>
The requested method POST is not allowed for the URL <P>
<HR>
<ADDRESS>Apache/1.3.27 Server at website.com Port 80</ADDRESS>
</BODY></HTML>

How can I make sure that I get the actual html data instead of the data
from redirected URL?

thanks,

Harlin



From mnations at gmail.com  Thu Apr 21 12:13:52 2005
From: mnations at gmail.com (Mudcat)
Date: 21 Apr 2005 09:13:52 -0700
Subject: Python Win32 Extensions and Excel 2003. OL 11.0 Supported?
In-Reply-To: <1iid61lqtl5u2hek2c7khnho9uinhgo4ie@4ax.com>
References: <1114012496.533936.297580@l41g2000cwc.googlegroups.com>
	<mailman.2187.1114016871.1799.python-list@python.org>
	<1iid61lqtl5u2hek2c7khnho9uinhgo4ie@4ax.com>
Message-ID: <1114100032.073223.296270@o13g2000cwo.googlegroups.com>

Yeah, yall are right. I did the same thing and found it pulling
different versions depending on which system I was on.

However I was confused because I tried to use an older version of
python win with Excel 2003 a couple of years ago, and it wouldn't work.
Somehow it couldn't handle OL 11.0. So I figured there must be a
connection in there somewhere that allows it to understand.

But as I sit here and type I'm wondering if this had more to do with
freezing the application which is what I was doing. I may have been
sending a compiled version of makepy (which back then was genpy) which
was compiled under an Office 2000 machine trying to get it to work on
an Office 2003 machine.

Now I could have sworn that at some point I removed the contents of the
genpy directory in the package I sent out, which would force each
machine to build one before it ran. But this was a problem I ran into
early and was told to not worry about at the time. Now I have to worry
about it more.

Anyone else have to package builds of com applications that need to be
supported on different versions of Office? A few tips on how to make
that run smoother would be some sweet info.



From mauriceling at acm.org  Tue Apr 26 21:35:29 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 11:35:29 +1000
Subject: Python internal design
References: <pan.2005.04.26.19.53.14.623507@ldre.Vanderbilt.Edu>
Message-ID: <d4mq93$hb1$1@domitilla.aioe.org>

Emre Turkay wrote:

> Hi Folks,
> 
> I am designing a tool, in which there are dynamic types and
> variables with these types. In this respect, it is more like an
> interpreted language design.
> 
> I wonder how these issues are implemented in Python are there any
> documents or articles about it, which I can read and get an idea.
> 
> Thanks,
> 
> emre

Hi,

I've been trying to look that up as well, in CoRR, ACM digital library 
but not much luck. I've got only peripheral hits using "python virtual 
machine" as search term. If you are looking for something at the level 
of "python language specification" and "python virtual machine 
specification", I am unable to find anything yet.

Please tell me if you managed to find something useful.

Cheers
Maurice


From modelnine at ceosg.de  Mon Apr  4 06:50:34 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Mon, 4 Apr 2005 12:50:34 +0200
Subject: import and scope inconsistency?
In-Reply-To: <d2r4j1$ggn$1@scotsman.ed.ac.uk>
References: <d2r4j1$ggn$1@scotsman.ed.ac.uk>
Message-ID: <200504041250.37540.modelnine@ceosg.de>

Am Montag, 4. April 2005 12:23 schrieb Jim:
> I can call MyFiles methods inside methods of the Brances classes.
> I cannot call Numeric methods inside methods of the Brances classes.
>
> 1. I was surprised I could call MyFiles methods in Branches methods.
> 2. Since I was used to using modules imported in the parent module I was
> surprised I couldn't use Numeric methods.

1. I can't answer you this one without looking at the actual code, but

2. You can never call any methods/classes which you imported in a "parent" 
module (actually, there's no such motion as parent module, as each module has 
its own namespace, and references to this namespace may appear anywhere else 
in another module).

In case this worked sometime ago and you didn't explicitly import the module 
in the "child" module, you silently did something like the following:

Mod1.py
-------

import Numeric
import Mod2

# Put the namespace (module object) in another namespace
Mod2.Numeric = Numeric

<blah>


Mod2.py
-------

<blah>


What you need for your simulation program is probably something like the 
following:

Simulation.py
-------------

import MyFiles
import Branches
import Numeric

print MyFiles.Branches is Branches # True
print MyFiles.Numeric is Numeric # True
print Branches.Numeric is Numeric # True


MyFiles.py
----------

import Branches
import Numeric

print Branches.Numeric is Numeric # True


Branches.py
-----------

import Numeric


HTH!

-- 
--- Heiko.
listening to: aenima_13_aenima.mp3
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From jerf at jerf.org  Sun Apr 24 15:47:02 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sun, 24 Apr 2005 15:47:02 -0400
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
Message-ID: <pan.2005.04.24.19.47.01.362557@jerf.org>

On Sat, 23 Apr 2005 22:45:14 -0400, Richard Blackwood wrote:
> Indeed, this language is math. My friend says that foo is a constant and
> necessarily not a variable. If I had written foo = raw_input(), he would
> say that foo is a variable. Which is perfectly fine except that he insists
> that since programming came from math, the concept of variable is
> necessarily the identical.

"The" concept? *snort* Your friend knows not of what he speaks.

Ask him if parallel lines cross. Then ask him if he has any right to get
snotty about terminology like that.

If he hasn't got far enough into math to understand why that question is
relevant, then he hasn't got far enough into math to opine on what a
"variable" is, anyhow. (By the way, if he says "no", and not "it depends
on your axiom choice", the same is true.)

(By math, are we talking *real* math like number theory or set theory,
something involving proofs, or high-school algebra that deals in numbers
and mere arithmetic? I rather suspect the latter, in which case you may
tell your friend y'all are so far out of your league you can't even tell
how far out you are. Nobody who has studied number theory or alternate
geometries or anything like real math could have this conversation, unless
they *really* missed the point of, well, everything they've done up to
that point...)


From Moderator  Fri Apr 22 11:39:57 2005
From: Moderator (Moderator)
Date: Fri, 22 Apr 2005 15:39:57 GMT
Subject: time.strftime in 2.4.1 claims data out of range when not
References: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
	<ja4ae.24814$Xm3.22734@trndny01> <4268e904$1_2@newspeer2.tds.net>
Message-ID: <0001HW.BE8E68E000277259F02845B0@news.verizon.net>

Hello,

Thank you to all who replied. Yes, obviously the extra values I'm passing are 
out of range, such as the ordinal day-number of the year. Oy.

I've been having a number of issues with switching from 2.2.2 to 2.4.1 and 
last night when I started trying to address this problem (at a late hour) I'm 
afraid my thunker sure wasn't thunking.

I like the datetime.date suggestion best, probably.

Again, thanks, and this will help me to get through this niggle...

Sheila King
http://www.thinkspot.net/sheila/

On Fri, 22 Apr 2005 05:26:02 -0700, Kent Johnson wrote
(in article <4268e904$1_2 at newspeer2.tds.net>):

> Raymond Hettinger wrote:
>> Since the rules for handling missing, inconsistent, or out-of-range tuple 
>> fields
>> are not defined, even that revision has some risk.  To future-proof the 
>> code,
>> use strptime() to generate a well-formed time tuple:
>> 
>>>>> strptime('%d-%d-%d' % (y,m,d), '%Y-%m-%d')
>> 
>> (2005, 5, 15, 0, 0, 0, 6, 135, -1)
>> 
>>>>> strftime("%Y-%m-%d", _)
>> 
>> '2005-05-15'
> 
> or use datetime.date which only needs y, m, d:
> 
>   >>> from datetime import date
>   >>> d=date(2005, 5, 15)
>   >>> d.strftime("%Y-%m-%d")
> '2005-05-15'
> 
> Kent




From apardon at forel.vub.ac.be  Wed Apr 20 09:58:25 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 20 Apr 2005 13:58:25 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<roy-30EA18.09365120042005@reader1.panix.com>
Message-ID: <slrnd6co01.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Roy Smith schreef <roy at panix.com>:
> Antoon Pardon <apardon at forel.vub.ac.be> wrote:
>
>> Personnaly I would like to have the choice. Sometimes I prefer to
>> start at 0, sometimes at 1 and other times at -13 or +7.
>
> Argggh.  Having two (or more!) ways to do it, would mean that every time I 
> read somebody else's code, I would have to figure out which flavor they are 
> using before I could understand what their code meant.  That would be evil.

This is nonsens. table[i] = j, just associates value j with key i.
That is the same independend from whether the keys can start from
0 or some other value. Do you also consider it more ways because
the keys can end in different values?

-- 
Antoon Pardon


From t-meyer at ihug.co.nz  Sun Apr 10 22:17:05 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Mon, 11 Apr 2005 14:17:05 +1200
Subject: compound strip() string problem
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E8028DC3CA@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB0062@its-xchg4.massey.ac.nz>

> As Sidharth Kuruvila pointed out, time.strftime() is probably 
> the best choice for your situation. For the general case of 
> removing whitespace from a sting, one method is:
> 
> ''.join(mystring.split())

Alternatively, you could do something like:

import string
for c in string.whitespace:
    mystring = mystring.replace(c, "")

Not as good if you want to remove all whitespace from the string, but it
looked like the OP only really had spaces, so a simple
mystring=mystring.replace(' ', '') would be the clearest (and fastest).

=Tony.Meyer



From steve at holdenweb.com  Thu Apr 21 04:32:56 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 04:32:56 -0400
Subject: building a small calculator
In-Reply-To: <1114028031.426500.74850@z14g2000cwz.googlegroups.com>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>	<mailman.2168.1113999910.1799.python-list@python.org>	<1114000275.227950.50870@f14g2000cwb.googlegroups.com>	<mailman.2171.1114000794.1799.python-list@python.org>	<1114000897.084753.80950@l41g2000cwc.googlegroups.com>	<mailman.2188.1114016953.1799.python-list@python.org>
	<1114028031.426500.74850@z14g2000cwz.googlegroups.com>
Message-ID: <d47o7c$ufp$1@sea.gmane.org>

aleksander.helgaker at gmail.com wrote:
> Thats great info. Thanks.
> 
> I guess I would know about this if I read through all the manuals, but
> I'm awefull at reading that kind of stuff. I'll just have to plow
> through it somehow.
> 
Take your time. Feel free to ask questions. Simon Brunning recommended 
the tutor list - those guys really can help, and it's not like using 
that list bars you from posting on comp.lang.python.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From rpmuller at gmail.com  Wed Apr  6 22:50:52 2005
From: rpmuller at gmail.com (RickMuller)
Date: 6 Apr 2005 19:50:52 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <sb2951dj13v41qkgg4kl4gj78hcalkga4f@4ax.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
	<1112835544.302702.294570@z14g2000cwz.googlegroups.com>
	<sb2951dj13v41qkgg4kl4gj78hcalkga4f@4ax.com>
Message-ID: <1112842252.302486.31800@z14g2000cwz.googlegroups.com>

Boy, what a snotty answer to a question that had nothing to do with a
homework assignment!



From bill.mill at gmail.com  Thu Apr  7 14:49:19 2005
From: bill.mill at gmail.com (Bill Mill)
Date: Thu, 7 Apr 2005 14:49:19 -0400
Subject: sorting a list and counting interchanges
In-Reply-To: <1f7befae0504071059492a9d57@mail.gmail.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mailman.1479.1112871689.1799.python-list@python.org>
	<7xvf6yzflz.fsf@ruckus.brouhaha.com>
	<1f7befae0504071059492a9d57@mail.gmail.com>
Message-ID: <797fe3d405040711493eb1d5fa@mail.gmail.com>

<snip>
> 
> I think it's harder for some people to see why the
> 
>     assert j not in seen
> 
> must be true, although that's obvious after just a few hours' thought <wink>.

That's where you get to leave comments like:

#it follows logically that
assert j not in seen

or

#by implication
assert j not in seen

just to really frustrate the guy reading your code.

Peace
Bill Mill
bill.mill at gmail.com


From mahs at telcopartners.com  Wed Apr  6 14:11:41 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 06 Apr 2005 11:11:41 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <1112787265.022988.205630@z14g2000cwz.googlegroups.com>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>	<mailman.1305.1112633442.1799.python-list@python.org>
	<1112787265.022988.205630@z14g2000cwz.googlegroups.com>
Message-ID: <d318kk$6lf$1@sea.gmane.org>

ladasky at my-deja.com wrote:
...
I see Steve Bethard has answered most of the points in your last eMail

> On line 11 we create a
> dictionary item in memo, [id(self):type(self)]...So now I'm confused as
> to the purpose of memo.  Why should it contain the ID of the *original*
> object?

No, you create memo[id(self):type(self)()] i.e., a mapping of the old object to 
a new object of the same type.  This new object does not yet contain the data of 
the old one, because you called its __init__ method with no arguments.

BTW, as I mentioned in a previous comment, I believe this would be more plainly 
written as type(self).__new__(), to emphasize that you are constructing the 
object without initializing it.  (There is a explanation of __new__'s behaviour 
at http://www.python.org/2.2/descrintro.html#__new__).  This works only for 
new-style classes (also explained in the same reference).  For old-style 
'classic' classes you would use new types.InstanceType

...
> 
> Is there another section of the Python docs that will clarify all this
> for me?  I got hung up on all the "static", "public", etc. declarations
> in Java early on.  Python has taken me an awful lot farther, but
> perhaps I'm hitting the conceptual wall again.

I assume you have seen http://docs.python.org/lib/module-copy.html which 
explains this topic and, in particular, why the memo dict is passed around.

Hang in there.  It's not an easy topic, and this example contains several 
subtleties as you have discovered.

If you want further help, why not post the actual class you are working with, 
and your __deepcopy__ attempt.  It would be much easier to react to something 
concrete than a general howto.

Michael



From jfj at freemail.gr  Mon Apr 25 05:40:50 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 25 Apr 2005 12:40:50 +0300
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <mailman.2436.1114423744.1799.python-list@python.org>
References: <86ll77pgqz.fsf@guru.mired.org>	<mailman.2430.1114408769.1799.python-list@python.org>
	<mailman.2436.1114423744.1799.python-list@python.org>
Message-ID: <426CBB22.1000001@freemail.gr>

I jfj wrote:

>
>   make_fractal_with_seed (x for x in range(100000000) if fibonacci_prime 
> (x))
> 

and this is stupendus.
At least range should be xrange.


jfj



From grante at visi.com  Thu Apr 21 11:31:02 2005
From: grante at visi.com (Grant Edwards)
Date: Thu, 21 Apr 2005 15:31:02 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
Message-ID: <116fhpmid1q0j2b@corp.supernews.com>

On 2005-04-21, Peter Maas <peter at somewhere.com> wrote:
> Maxim Kasimov schrieb:
>> but what if i just can't to do this becouse i'm working thrue ssh, and 
>> have to use only installed editors (such as vi)
>
> - at first line of block enter: ma (mark line as 'a')
> - go to last line of block
> - enter :'a,.s/^/###/ (insert 3 comment chars at begin of line,
>    starting from line marked as 'a' to current line)

Sure, but what about the case where his program is on paper
tape and all he has for an editor is an ice pick?

-- 
Grant Edwards                   grante             Yow!  Kids, don't gross me
                                  at               off... "Adventures with
                               visi.com            MENTAL HYGIENE" can be
                                                   carried too FAR!


From caneff at gmail.com  Sat Apr  9 17:02:15 2005
From: caneff at gmail.com (ChinStrap)
Date: 9 Apr 2005 14:02:15 -0700
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60_=28newsgroup-post_127=29?=
In-Reply-To: <E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
Message-ID: <1113077691.592413.152130@o13g2000cwo.googlegroups.com>

Thats not what Jack Chick says >=(

http://www.chick.com/catalog/tractlist.asp



From shalabh at cafepy.com  Tue Apr  5 00:02:26 2005
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Mon, 04 Apr 2005 21:02:26 -0700
Subject: Web application toolkit recommendation?
In-Reply-To: <d4c0d480050404170177c7e94b@mail.gmail.com>
References: <d4c0d480050404170177c7e94b@mail.gmail.com>
Message-ID: <d2t2h0$6re$1@sea.gmane.org>

Stewart Midwinter wrote:
> hi all:
> 
> I'm a python user in my day job. Now I want to take on a personal pet
> project which will involve the creation of a website on my home
> server.  I'll want to keep track of users through user accounts and
> logins, allow them to upload information to a database (maybe mySQL or
> SqLite), and in the future allow upload of GPS tracklogs and
> subsequent presentation of those tracklogs on a graphical map image).
> 

I recommend Quixote as a fairly simple, powerful and 'Pythonic' 
framework. Since you are already a Python user, it shouldn't be hard to 
pick up. There is no included persistence so you'd have to use the db 
library yourself. More info here: 
http://www.mems-exchange.org/software/quixote/

Cheers,
Shalabh



From johnny.shz at gmail.com  Mon Apr 11 18:06:18 2005
From: johnny.shz at gmail.com (johnny.shz at gmail.com)
Date: 11 Apr 2005 15:06:18 -0700
Subject: Programming Language for Systems Administrator
In-Reply-To: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com>
Message-ID: <1113257178.324624.14300@g14g2000cwa.googlegroups.com>


Kanthi Kiran Narisetti wrote:
> Hi All,
>
> I am Windows Systems Administrator(planning to migrate to Linux
> administration in near future), I have occassionally written few
batch
> files and Vbscripts to automate my tasks.
>
> Now I have strong interest to learn a programming language that would
> help me to write Scripts or Application ( In Systems Administrative
> point of view) .
>
> I have read on net that Python is the best way to start of for
beginers
> , Please let me your suggestions and help me out to chose to the
right
> programming language to write scripts ranging from simple automation
> scripts to appliations for my workflow.
>
> I am confused to chose between C++,Python,Perl.
> 
> Thanks in Advance
> 
> Kk



From radam2 at tampabay.rr.com  Wed Apr 20 14:21:11 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Wed, 20 Apr 2005 18:21:11 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
In-Reply-To: <bJCdnexxUpYnd_jfRVn-pw@comcast.com>
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<CoOdnZbRee_Mg_7fRVn-rQ@comcast.com>
	<1113800859.317109.27720@f14g2000cwb.googlegroups.com>
	<WNf9e.8539$_t3.4915@tornado.tampabay.rr.com>
	<bJCdnexxUpYnd_jfRVn-pw@comcast.com>
Message-ID: <r4x9e.7615$716.2428@tornado.tampabay.rr.com>

Steven Bethard wrote:

> Ron wrote:
> 
>> How about using ***name in the same way as *name, and **name are used? 
>> It extends the current argument options in a consistent manner and 'I 
>> believe' is easy to explain and visually says something different is 
>> happening here.
>>
>> This builds on the already present arg, *arg, **arg,  and so why not a 
>> ***arg to represent the 4th alternative, a suite?
> 
> 
> I dont' see how this is consistent.  *arg and **arg correspond to the 
> two different container protocols: sequence/iterable and mapping.  Which 
> container protocol do you se ***arg as corresponding to?  Note that 
> namespaces are just mappings, so if you want to treat a block like a 
> namespace, **arg makes more sense...
> 
> STeVe

Another possibility is to use an additional symbol to indicate "not 
here", "over there" or "outside this": %**args.  That has the advantage 
of allowing further expansion in the future if it's needed without 
getting into long strings of '******'s.  Although I don't think that 
would happen.

Too many various thoughts on this are are jumping in my mind right now. 
Which is partly why I've been staying out of this discussion. So here 
are some of them in no particular order.

(Q1.) Is it possible that a new container might be added to python 3000 
(or earlier) to correspond to a names suite?  Or a named lazy suite? 
ie.. one that might be evaluated at the function call versus at the 
define?  Or evaluated upon request?

[1] If so, the ***arg could be consistent in being a container protocol.


(Q2.)  Are the use of '*'s and '**'s allowed anywhere else beside within 
function call def's and call's?  I presume not because it would conflict 
with multiply and exponent operators. So this suggests to me it is 
specific function 'use' case's of function arguments and not general 
container protocol representation that can be used else where.

[1] If there are conflicts outside of function call use, then again 
**args should be preferred as not to create any additional conflicts.

[3] If the use of '*', and '**',  are used specifically to tell function 
calls and defs how to evaluate and use an argument vs a general 
container indicator.  Then ***arg has the advantage of indicating to use 
a named suite or an dict to be defined within the function body.  Named 
suites outside the function could use **arg as they would have already 
been evaluated.


     # arg suite defined in the function.
     x = function(***arg)
	arg:
	    a = 1
	    b = 22
             #continued ...
	#body


     # arg suite defined prior to function call.
     arg:
	a = 1
         #continued ...
     x = function(**arg)


Q3.  Which is more important, compiler/byte code representation of 
objects and operators or the user/syntax representation of objects and 
operators?  Are we more concerned with the low level representation to 
the compiler or the higher level representation to the user?

[1.] From a 'higher level'/'differing syntax' stand point,  the ***arg 
alternative more clearly communicates that there is a difference in it's 
use to the programmer. (although the low level representation may be the 
same as **arg)

[2.] If it's more important that an accurate representation of the lower 
level inner workings be maintained, then **args should again be preferred.


As far as my reference to consistency, forget I said that.  I think 
practicality might be more important than consistency here.  Consistency 
between small groups of one to three items is not a very strong 
association in any case.


Cheers,
Ron_Adam



From knyght at gmail.com  Sat Apr  2 10:45:14 2005
From: knyght at gmail.com (Tom Carrick)
Date: Sat, 2 Apr 2005 16:45:14 +0100
Subject: Performance issue
Message-ID: <edce2a2e05040207452bb2a1ad@mail.gmail.com>

Hi,

In my attempted learning of python, I've decided to recode an old
anagram solving program I made in C++. The C++ version runs in less
than a second, while the python takes 30 seconds. I'm not willing to
think it's just python being slow, so I was hoping someone could find
a faster way of doing this. Also, I was wondering if there was a more
builtin, or just nicer way of converting a string to a list (or using
the sort function on a list) than making a function for it.

The words.txt here is just a copy of FreeBSD's /usr/share/dict/words

Anyway, the code:

import string

# Need a function to convert a string to a list to be
# able to use the sort() function
def string2list(s):
    l = []
    for i in range(0, len(s)):
        l.append(s[i])
    return l

words = []
found = []

anagram = raw_input("Find anagrams of word: ")

f = open('words.txt', 'r')
file = f.read()
f.close()

words = file.splitlines()

sorted_anagram = anagram.lower()
sorted_anagram = string2list(anagram)
sorted_anagram.sort(lambda x, y: cmp(x, y))


while words:
    if len(words[0]) == len(sorted_anagram):
        wordlist = string2list(words[0])
        wordlist.sort(lambda x, y: cmp(x, y))
        sorted_wordlist = wordlist
        if sorted_anagram == sorted_wordlist:
            found.append(words[0])
    del words[0]

print "Anagrams of " + anagram + ": "
while found:
    print found[0] + " "
    del found[0]


From mauriceling at acm.org  Sat Apr 16 04:38:44 2005
From: mauriceling at acm.org (Maurice LING)
Date: Sat, 16 Apr 2005 18:38:44 +1000
Subject: RE Engine error with sub()
References: <d3nhqk$dlo$1@domitilla.aioe.org>
Message-ID: <d3qiui$sh1$1@domitilla.aioe.org>

Hi all,

I think I might have a workaround to this problem but have no idea how 
to work it through. I hope that someone can kindly help me out because I 
do not quite understand the mechanics of the _make_regex() method in the 
original codes...

My idea is, instead of having one UserDict, have a list of UserDicts. So 
  a large unprocessable replacement rule set is split into multiple 
smaller files, with each file read into a UserDict and it is made into a 
  RE matcher. Then iterative matching using a list of REs.

In short, the current precedure is
1 dictionary, 1 RE, 1 RE matcher... to match inputs
My workaround is to change it to
list of dictionaries, list of REs, list of RE matcher... iterative 
matching of inputs.

Can someone kindly help me out here?

Thanks in advance.

Cheers,
Maurice


Maurice LING wrote:

> Hi,
> 
> I have the following codes:
> 
> from __future__ import nested_scopes
> import re
> from UserDict import UserDict
> 
> 
> class Replacer(UserDict):
>     """
>     An all-in-one multiple string substitution class. This class was 
> contributed by Xavier
>     Defrang to the ASPN Python Cookbook 
> (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81330)
>     and alane at sourceforge.net.
> 
>     Copyright: The methods _make_regex(), __call__() and substitute() 
> were the work of Xavier Defrang,
>     __init__() was the work of alane at sourceforge.net, all others were 
> the work of Maurice Ling"""
> 
>     def __init__(self, dict = None, file = None):
>         """Constructor. It calls for the compilation of regular 
> expressions from either
>         a dictionary object or a replacement rule file.
> 
>         @param dict: dictionary object containing replacement rules with 
> the string to be
>                         replaced as keys.
>         @param file: file name of replacement rule file
>         """
>         self.re = None
>         self.regex = None
>         if file == None:
>             UserDict.__init__(self, dict)
>             self._make_regex()
>         else:
>             UserDict.__init__(self, self.readDictionaryFile(file))
>             self._make_regex()
> 
>     def cleanDictionaryFile(self, file):
>         """
>         Method to clean up the replacement rule dictionary file and 
> write the cleaned
>         file as the same name as the original file."""
>         import os
>         dict = self.readDictionaryFile(file)
>         f = open(file, 'w')
>         for key in dict.keys(): f.write(str(key) + '=' + str(dict[key]) 
> + os.linesep)
>         f.close()
> 
>     def readDictionaryFile(self, file):
>         """
>         Method to parse a replacement rule file (file) into a dictionary 
> for regular
>         expression processing. Each rule in the rule file is in the form:
>             <string to be replaced>=<string to replace with>
>             """
>         import string
>         import os
>         f = open(file, 'r')
>         data = f.readlines()
>         f.close()
>         dict = {}
>         for rule in data:
>             rule = rule.split('=')
>             if rule[1][-1] == os.linesep: rule[1] = rule[1][:-1]
>             dict[str(rule[0])] = str(rule[1])
>         print '%s replacement rule(s) read from %s' % 
> (str(len(dict.keys())), str(file))
>         return dict
> 
>     def _make_regex(self):
>         """ Build a regular expression object based on the keys of the 
> current dictionary """
>         self.re = "(%s)" % "|".join(map(re.escape, self.keys()))
>         self.regex = re.compile(self.re)
> 
>     def __call__(self, mo):
>         """ This handler will be invoked for each regex match """
>         # Count substitutions
>         self.count += 1 # Look-up string
>         return self[mo.string[mo.start():mo.end()]]
> 
>     def substitute(self, text):
>         """ Translate text, returns the modified text. """
>         # Reset substitution counter
>         self.count = 0
>         # Process text
>         #return self._make_regex().sub(self, text)
>         return self.regex.sub(self, text)
> 
>     def rmBracketDuplicate(self, text):
>         """Removes the bracketed text in occurrences of '<text-x> 
> (<text-x>)'"""
>         regex = re.compile(r'(\w+)\s*(\(\1\))')
>         return regex.sub(r'\1', text)
> 
>     def substituteMultiple(self, text):
>         """Similar to substitute() method except that this method loops 
> round the same text
>         multiple times until no more substitutions can be made or when 
> it had looped
>         10 times. This is to pre-ampt for cases of recursive 
> abbreviations."""
>         count = 1 # to get into the loop
>         run = 0 # counter for number of runs thru the text
>         while count > 0 and run < 10:
>             count = 0
>             text = self.rmBracketDuplicate(self.substitute(text))
>             count = count + self.count
>             run = run + 1
>             print "Pass %d: Changed %d things(s)" % (run, count)
>         return text
> 
> 
> 
> 
> Normally I will use the following to instantiate my module:
> 
> replace = Replacer('', 'rule.mdf')
> 
> rule.mdf is in the format of "<string to be replaced>=<string to replace 
> with>\n"
> 
> Then using replace.substituteMultiple('<my text>') to carry out multiple 
> replacements.
> 
> It all works well for rule count up to 800+ but when my replacement 
> rules swells up to 1800+, it gives me a runtime error that says 
> "Internal error in regular expression engine"... traceable to "return 
> self.regex.sub(self, text)" in substitute() method.
> 
> 
> Any ideas or workarounds?
> 
> Thanks in advance.
> 
> Cheers,
> Maurice


From m at m.com  Thu Apr 28 17:30:55 2005
From: m at m.com (monkey)
Date: Fri, 29 Apr 2005 05:30:55 +0800
Subject: why "import wx" doesn't work?
References: <427126ca$1_3@rain.i-cable.com>
	<AIGdndAYHJms3ezfRVn-ig@powergate.ca>
Message-ID: <4271560d$1_2@rain.i-cable.com>

It is the current version of wxPython(2.6). But follow you instruction it
still can't work...
But if using the default "from wxPython.wx import *", it work, don't know
what is the problem. May be this is an old example that cannot work with
"import wx". Because I get another example and it is ok.

Anyway, I hope I can catch up with you guys here in python programming soon.
Thanks a lot ( :

> Assuming you've installed a version of wxPython that is recent enough
> that "import wx" works (it's really unclear from what you've written
> above), then the problem you are facing is not using the namespace that
> you've now imported.  Do this instead:
>
> class MyApp(wx.App):
>      def OnInit(self):
>          frame = wx.Frame(NULL, -1, "....
>
>
> Note that "wx." before everything from wxPython...
>
> -Peter




From mertz at gnosis.cx  Thu Apr  7 00:34:17 2005
From: mertz at gnosis.cx (David Mertz, Ph.D.)
Date: Thu, 07 Apr 2005 00:34:17 -0400
Subject: [Announce] Gnosis Utils 1.2.0
Message-ID: <JhLVClKkX0bQ092yn@gnosis.cx>                

David Mertz (mertz at gnosis.cx)
Frank McIngvale (frankm at hiwaay.net)

    This release of the Gnosis Utilities contains several new modules,
    as well as fixes, enhancements, and speedups in existing
    subpackages.

  Try it out, have fun, send feedback!

NEW SUBPACKAGES
------------------------------------------------------------------------

  ADDED gnosis.utils.hashcash (also runs standalone). Python
  implementation of Hashcash v.1 (backward compatible with hashcash
  v.0).

  ADDED disthelper. A collection of scripts and modules that are
  generally useful for building/maintaining a Python source
  distribution.

   - To use disthelper in your own distribution, copy the entire
     disthelper/ tree into the toplevel of your tree, as has been done
     in Gnosis_Utils.
   - See disthelper/README for details.

  ADDED gnosis.pyconfig. Detect actual capabilities available in a
  Python interpreter. gnosis.pyconfig lets you write much more
  robust/readable code than simply relying on sys.version_info.

  ADDED gnosis.xml.xmlmap. Unicode->XML legality testing & Unicode
  helper functions.

   - For detailed background information on the motivation for
     this module, see "All About Python and Unicode" at:
     http://boodebr.org/python/pyunicode/index.html

ENHANCEMENTS
------------------------------------------------------------------------

  There is one critical change in gnosis.xml.pickle; all xml.pickle
  users are encouraged to upgrade.

  Catch unpickleable data in gnosis.xml.pickle and abort, instead of
  creating pickles that can't be reloaded.

   - Recommend all xml.pickle users upgrade to 1.2.0.
   - Issues: not all valid Unicode strings are valid XML CDATA or
     attribute values.
   - There have not been any reports of data loss due to this, but it
     is a possibility with 1.1.1.
   - A future Gnosis release will fix this so that the 'bad' data can
     be pickled, instead of just bailing out.

  Numerous new convenience functions for gnosis.xml.objectify. See
  gnosis/docs/xml_matters_39.txt for more discussion.

   - addChild()  # moved to utils subpackage
   - walk_xo()   # Recursively traverse the nodes
   - write_xml() # Serialize an _XO_ object back into XML
   - XPath()     # Find node(s) within an _XO_ object
   - pyobj_printer()  # moved to utils subpackage

  Some of older conveniences have been tweaked and/or were not announced
  previously:

   - content()   # The (mixed) content of o as a list
   - children()  # The child nodes (not PCDATA) of o
   - text()      # List of textual children
   - dumps():    # The PCDATA in o (preserves whitespace)
   - normalize() # Whitespace normalize string,
                 # e.g. o.PCDATA==normalize(dumps(o))
   - tagname()   # The element tag o was generated from
   - attributes()# List of (XML) attributes of o

  Fixed two bugs causing leaks in long running gnosis.xml.objectify
  processes (file close and expat base class).

  Significant speedups by miscellaneous refactoring/cleanup in
  gnosis.xml.objectify.

  Fixes to gnosis.xml.indexer suggested by Uche Ogbuju.

  Security fixes to gnosis.utils.convert.dmText2Html.

DOWNLOADING:
------------------------------------------------------------------------

  Browse the latest development snapshot or download it using 'wget -r'
  or similar tools:

    http://gnosis.cx/download/gnosis/

  It may be obtained at:

    http://gnosis.cx/download/Gnosis_Utils-1.2.0.tar.gz

  The current release is always available as:

    http://gnosis.cx/download/Gnosis_Utils-current.tar.gz

  Other distribution formats and older versions can be found at:

    http://gnosis.cx/download/Gnosis_Utils.More/


BACKGROUND:
------------------------------------------------------------------------

  Gnosis Utilities contains a number of Python libraries, most (but not
  all) related to working with XML. These include:

    disthelper              (Create more flexible distutils archives)
    gnosis.indexer          (Full-text indexing/searching)
    gnosis.xml.pickle       (XML pickling of Python objects)
    gnosis.xml.objectify    (Any XML to "native" Python objects)
    gnosis.xml.validity     (Enforce validity constraints)
    gnosis.xml.relax        (Tools for working with RelaxNG)
    gnosis.xml.indexer      (XPATH indexing of XML documents)
    [...].convert.txt2html  (Convert ASCII source files to HTML)
    gnosis.util.dtd2sql     (DTD -> SQL 'CREATE TABLE' statements)
    gnosis.util.sql2dtd     (SQL query -> DTD for query results)
    gnosis.util.xml2sql     (XML -> SQL 'INSERT INTO' statements)
    gnosis.util.combinators (Combinatorial higher-order functions)
    gnosis.util.introspect  (Introspect Python objects)
    gnosis.utils.hashcash   (Hashcash proof-of-work protocol)
    gnosis.magic            (Multimethods, metaclasses, etc)
    gnosis.trigramlib       (Work w/ trigrams, e.g. spam filtering)
    gnosis.pyconfig         (Capability-based version adaptation)

...and so much more! :-)



From peter at engcorp.com  Tue Apr 12 12:28:05 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 12 Apr 2005 12:28:05 -0400
Subject: printing with wxPython
In-Reply-To: <h8Q6e.60538$zZ1.1719996@twister1.libero.it>
References: <h8Q6e.60538$zZ1.1719996@twister1.libero.it>
Message-ID: <FKydnWvMkrSIasbfRVn-3g@powergate.ca>

Fabio Pliger wrote:
> Hi!
> I'm using wxPython to handle my application gui.. So,  I have a notebook
> widget and i have to print the object inside it's tab ... Maybe doing a
> preview before printing... I know that wx has many objects to handle
> printing.. i've tryied to use them, but i wasn't able to... Any hint? By
> now, i solved the problem saving a screenshot if the screen in an image(bmp)
> and then sending it to printer... (a print preview would be cool...)
> tnx

Maybe the recipes on the wxPython wiki page would
help:
http://wiki.wxpython.org/index.cgi/RecipesOther

There are at least two dealing with "Printing".


From tjreedy at udel.edu  Tue Apr 26 19:15:31 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 26 Apr 2005 19:15:31 -0400
Subject: Coding Standards (and Best Practices)
References: <1114538687.21150@hqnntp01.autodesk.com>
Message-ID: <d4mhok$l9l$1@sea.gmane.org>


"Isaac Rodriguez" <discussion.support at autodesk.com> wrote in message 
news:1114538687.21150 at hqnntp01.autodesk.com...
> Does anyone know where I can get some information about what
> the community is doing? Are there any well defined guidelines 
> established?

Besides PEP8, there is also the library code itself.  When reading that 
though, keep in mind that different modules were written by different 
people at different times.  Some were written before PEP8.

TJR
] 





From pinard at iro.umontreal.ca  Wed Apr  6 09:33:08 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Wed, 6 Apr 2005 09:33:08 -0400
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d2vhi8$k29$1@panix1.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com>
Message-ID: <20050406133308.GA23620@alcyon.progiciels-bpi.ca>

[Aahz]

> [Fran?ois]

> >Many of us are using Python today, week after week, year long.  So
> >let's be pragmatic.  Python is what it became and now is.  Let's not
> >define it as a memory from the past nor as a futuristic dream.

> You're free to continue using 1.5.2.  [...]

Sure, of course.  Yet, our friendly argument is sliding away from was it
originally was.  The point was about not asserting in this forum that
Python "has only one way to do it", because this is not true anymore.

The principle has been, it may be back in some distant future, but now
it is not.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From dotpyFE at gmail.com  Wed Apr 27 08:19:40 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Wed, 27 Apr 2005 12:19:40 GMT
Subject: Can .py be complied?
In-Reply-To: <1114569525.807638.48640@l41g2000cwc.googlegroups.com>
References: <d4mq31$gq3$1@domitilla.aioe.org><426ec8f7_2@rain.i-cable.com>
	<1114569158.396231.45460@z14g2000cwz.googlegroups.com>
	<1114569525.807638.48640@l41g2000cwc.googlegroups.com>
Message-ID: <wrLbe.118$pe3.111@newsread3.news.atl.earthlink.net>

ryan at ryankaskel.com wrote:
> ryan at ryankaskel.com wrote:
> 
>>I don't know the exact details, but try using the compiled Python
>>scripts (bytecode). I believe they are semi-optimized and platform
>>independent. They are the .pyc and .pyo files generated when the
> 
> script
> 
>>is run.
> 
> 
> Okay, I found this documentation
> <http://fux0r.phathookups.com/programming-tutorials/Python/tut/node43.html>.
> It hides the source but you still need Python installed on the system
> running the bytecode.
> 

But those files can be decompyled.

-- 
--------------------------
Lucas Raab
lvraab"@"earthlink.net
dotpyFE"@"gmail.com
AIM:	Phoenix11890
MSN:	dotpyfe"@"gmail.com
IRC:	lvraab
ICQ:	324767918
Yahoo:	Phoenix11890


From dwelch at vcd.hp.com  Wed Apr 27 11:56:23 2005
From: dwelch at vcd.hp.com (djw)
Date: Wed, 27 Apr 2005 08:56:23 -0700
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <d4octn$dln$1@news.vcd.hp.com>

monkey wrote:
> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
> 
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.
> 
> 
> 
Eric3 for big stuff.
SciTE for small stuff.



From hancock at anansispaceworks.com  Sat Apr  9 01:02:02 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sat, 9 Apr 2005 00:02:02 -0500
Subject: Python Equivalent to Java Interfaces?
In-Reply-To: <d37kmc$lrp$1@news-int2.gatech.edu>
References: <d37kmc$lrp$1@news-int2.gatech.edu>
Message-ID: <200504090002.03361.hancock@anansispaceworks.com>

On Friday 08 April 2005 11:12 pm, Brian Kazian wrote:
> I want to insure that all subclasses implement a certain method, but could 
> not find anything that would do this for me.  Is there anyway in Python to 
> implement this check?  Thanks! 

I understand there are two interface implementations in Python, one
for Zope (in particular, the Zope 3 code has an implementation that
can be rather easily separated out if you don't want all of Zope),
and something called PyProtocols. Obviously, I only know my way
around the Zope version, but it's pretty good.

You realize of course, that if you really only wanted to check for a particular
method, you can easily do this without extra help:

if not (hasattr(myclass, mymethod) and iscallable(mymethod)):
    raise MyInvalidClassError

or something like that.  The interface modules make it easier to automate
much more complicated checks for lots of methods, etc., and are quite
useful when you have lots of interfaces to keep straight.

Cheers,
Terry


--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From nospam at nospam.com  Tue Apr  5 10:41:51 2005
From: nospam at nospam.com (3c273)
Date: Tue, 5 Apr 2005 07:41:51 -0700
Subject: Insert database rows from CSV file
References: <d2sb9901nlr@enews3.newsguy.com>	<CuSdndFAEfVYIczfRVn-iw@comcast.com>	<d2sgje01vc1@enews3.newsguy.com><bp2451l8psd6qnid15jpmv0ooipqsl95b0@4ax.com>
	<mailman.1363.1112686436.1799.python-list@python.org>
Message-ID: <d2u83f020rs@enews4.newsguy.com>


"Steve Holden" <steve at holdenweb.com> wrote in message
news:mailman.1363.1112686436.1799.python-list at python.org...
> Dennis Lee Bieber wrote:
> > On Mon, 4 Apr 2005 15:54:37 -0700, "3c273" <nospam at nospam.com> declaimed
> > the following in comp.lang.python:
> >
> >
> >>Thanks for the link, but this is the step I am trying to save (for
someone
> >>else). Every time he goes to run a report, he must stop and import any
new
> >>csv files. Since the files are generated by a Python script, I thought I
> >
> >
> > That information wasn't supplied in the original message. Your
> > original post implied that the data source /was/ the CSV file...
> >
> > Show us the code segment that is writing the CSV file, and we
> > can probably show you the DB-API equivalent for "writing" a new record
> > to the table.
> >
> > For short however:
> >
> > aCustomer = "Customer1"
> > theWidget = "Widget1"
> > aQuantity = 1000
> >
> > # I'm presuming the table only has the three columns, since you didn't
> > list fields
> > cursor.execute(""" INSERT INTO "Table1" Values (%s, %s, %s) """,
> > (aCustomer, theWidget, aQuantity))
>
> Beware, however, that the parameter markers ("%s" in the example above)
> will depend on which database module you use - some modules will expect
> "?", for example. This depends on the module's "paramstyle".
>
> Also, don't forget to commit the changes!
>
> regards
>   Steve

Thanks for the heads-up. I think I'm well on my way now.
Louis




From modelnine at ceosg.de  Sat Apr  9 05:55:11 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Sat, 9 Apr 2005 11:55:11 +0200
Subject: change the date string into timestamp
In-Reply-To: <20050409093821.98044.qmail@web8402.mail.in.yahoo.com>
References: <20050409093821.98044.qmail@web8402.mail.in.yahoo.com>
Message-ID: <200504091155.15032.modelnine@ceosg.de>

Am Samstag, 9. April 2005 11:38 schrieb praba kar:
>     In Php strtotime() will change a date
> string into timestamp.  I want to know which
> python function will  change a date string
> into timestamp.

You want the standard library function strptime from the time module (in case 
it's a timestamp you're looking for), otherwise have a look at the library 
documentation for the datetime module, which gives you a datetime class which 
can also be constructed strptime-like from a string.

Example:

>>> date = "Fri, 8 Apr 2005 09:22:14 +0900"
>>> timetuple = time.strptime(date,"%a, %d %b %Y %H:%M:%S +0900")
>>> timetuple
(2005, 4, 8, 9, 22, 14, 4, 98, -1)
>>> timestamp = time.mktime(timetuple)
>>> timestamp
1112944934.0

The timestamp is in local time, as is the timetuple (I've hardcoded the +0900, 
there's no format string which will parse the timezone parameter, and recode 
the time to UTC, it's up to you to do that).

-- 
--- Heiko.
listening to: Pearl Jam - Spin The Black Circle
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From jepler at unpythonic.net  Sat Apr 30 22:57:41 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 30 Apr 2005 21:57:41 -0500
Subject: How to track down all required shared libraries?
In-Reply-To: <1114896365.287665.126130@o13g2000cwo.googlegroups.com>
References: <1114896365.287665.126130@o13g2000cwo.googlegroups.com>
Message-ID: <20050501025738.GA7269@unpythonic.net>

One poster suggests 'ldd' for executables.  You can also use this on shared
libraries:
$ ldd /usr/lib/python2.3/lib-dynload/_tkinter.so 
        libtix8.1.8.4.so => /usr/lib/libtix8.1.8.4.so (0x009b6000)
        libtk8.4.so => /usr/lib/libtk8.4.so (0x00111000)
        libtcl8.4.so => /usr/lib/libtcl8.4.so (0x00539000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00a48000)
        libpthread.so.0 => /lib/tls/libpthread.so.0 (0x001de000)
        libc.so.6 => /lib/tls/libc.so.6 (0x001f0000)
        libdl.so.2 => /lib/libdl.so.2 (0x0052d000)
        libm.so.6 => /lib/tls/libm.so.6 (0x00fcf000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x00656000)
If you know what shared modules your program uses, you can "ldd" them all and
find out the set of libraries they are linked to.

Jeff
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From WLigtenberg at gmail.com  Fri Apr 22 07:48:15 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Fri, 22 Apr 2005 13:48:15 +0200
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
	<f02bb$42689caa$d8fe9d56$24772@PRIMUS.CA>
Message-ID: <pan.2005.04.22.11.48.13.138980@gmail.com>

This is all the info I need from the xml file:
ID --> 	<Gene-track_geneid>320632</Gene-track_geneid>

Name --> 	<Gene-ref>
        <Gene-ref_locus>Pzp</Gene-ref_locus>
        
Startbase --> <Gene-commentary_seqs>
        <Seq-loc>
          <Seq-loc_int>
            <Seq-interval>
              <Seq-interval_from>126957426</Seq-interval_from>
              <Seq-interval_to>126989473</Seq-interval_to>
              <Seq-interval_strand>
                <Na-strand value="plus"/>
              </Seq-interval_strand>
              <Seq-interval_id>
                <Seq-id>
                  <Seq-id_gi>51860766</Seq-id_gi>
                </Seq-id>
              </Seq-interval_id>
            </Seq-interval>
          </Seq-loc_int>
        </Seq-loc>
      </Gene-commentary_seqs>
Endbase

Function --> <Prot-ref_name>
        <Prot-ref_name_E>U5 snRNP-specific protein, 200 kDa</Prot-ref_name_E>
        <Prot-ref_name_E>U5 snRNP-specific protein, 200 kDa (DEXH RNA helicase
family)</Prot-ref_name_E>
      </Prot-ref_name>

DBLink --> <Gene-ref_locus-tag>MGI:2444401</Gene-ref_locus-tag>
<Gene-commentary_source>
                <Other-source>
                  <Other-source_src>
                    <Dbtag>
                      <Dbtag_db>GO</Dbtag_db>
                      <Dbtag_tag>
                        <Object-id>
                          <Object-id_id>5524</Object-id_id>
                        </Object-id>
                      </Dbtag_tag>
                    </Dbtag>
                  </Other-source_src>
                  <Other-source_anchor>ATP binding</Other-source_anchor>
                  <Other-source_post-text>evidence: ISS</Other-source_post-text>
                </Other-source>
              </Gene-commentary_source>

Product-type --> <Entrezgene_type value="protein-coding">6</Entrezgene_type>

gene-comment --> <Gene-ref_desc>activating signal cointegrator 1 complex subunit 3-like
1</Gene-ref_desc>

synonym --> <Gene-ref_syn>
        <Gene-ref_syn_E>HELIC2</Gene-ref_syn_E>
        <Gene-ref_syn_E>KIAA0788</Gene-ref_syn_E>
        <Gene-ref_syn_E>U5-200KD</Gene-ref_syn_E>
        <Gene-ref_syn_E>U5-200-KD</Gene-ref_syn_E>
        <Gene-ref_syn_E>A330064G03Rik</Gene-ref_syn_E>
      </Gene-ref_syn>
      
EC --> <Prot-ref_ec>
        <Prot-ref_ec_E>1.5.1.5</Prot-ref_ec_E>
        <Prot-ref_ec_E>3.5.4.9</Prot-ref_ec_E>
      </Prot-ref_ec>

Chromosome: <SubSource>
            <SubSource_subtype value="chromosome">1</SubSource_subtype>
            <SubSource_name>6</SubSource_name>
          </SubSource>

Some can happen more than once in a record.


On Fri, 22 Apr 2005 02:41:46 -0400, William Park wrote:

> Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
>> On Sun, 17 Apr 2005 02:16:04 +0000, William Park wrote:
>> > Care to post more details?
>> 
>> The XML file I need to parse contains information about genes.
>> So the first element is a gene and then there are a lot sub-elements with
>> sub-elements. I only need some of the informtion and want to store it in
>> my an object called gene. Lateron this information will be printed into a
>> file, which in it's turn will be fed into some other program.
> 
> You have to help us a little more here.  Which info do you want to
> extract from below example?
> 
>> <Entrezgene-Set>
>> ...
>> </Entrezgene-Set>



From irmen.NOSPAM at xs4all.nl  Fri Apr 22 16:39:55 2005
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 22 Apr 2005 22:39:55 +0200
Subject: figuring out # of bytes
In-Reply-To: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
References: <1114201737.736514.8470@l41g2000cwc.googlegroups.com>
Message-ID: <4269611c$0$153$e4fe514c@news.xs4all.nl>

codecraig wrote:
> i want to the number of bytes in a string...
> 
> is, len(x) accurate?
> 
> so, x = "hi"
> len(x) == 2 ....so that means two bytes?
> 
> thanks
> 

As long as type(x)==str, this is correct.

--Irmen


From snoylr at gmail.com  Sat Apr 30 10:08:03 2005
From: snoylr at gmail.com (snoylr at gmail.com)
Date: 30 Apr 2005 07:08:03 -0700
Subject: Tkinter app=App(root) problem
Message-ID: <1114870083.651218.160450@l41g2000cwc.googlegroups.com>

This is my first day working with Tkinter.  I'm using python2.3 on
WindowsXP. I found this program and entered it.

from Tkinter import *

class App:
    def _init_(self,master):
        frame = Frame(master)
        frame.pack()

        self.button = Button(frame, text = "Quit", fg = "red", command
=frame.quit)
        self.button.pack(side=LEFT)

        self.hi_there = Button(frame, text = "Hello", command =
self.say_hi)
        self.hi_there.pack(side=LEFT)

    def say_hi(self):
        print "hi there, everyone!"

root = Tk()
app = App(root)
root.mainloop()

When I run the code in IDLE I get the initial frame but no buttons with
the following error:

Traceback (most recent call last):
  File "C:\Documents and Settings\INTERNET\Desktop\hello2.py", line 18,
in ?
    app = App(root)
TypeError: this constructor takes no arguments

I have also tried to save the program as with a pyw extension.  Nothing
happens when I try to run it with that extension.



From sizelji at insightbb.com  Thu Apr 21 13:33:56 2005
From: sizelji at insightbb.com (Jim Sizelove)
Date: Thu, 21 Apr 2005 17:33:56 GMT
Subject: recording data between [ and ]
In-Reply-To: <mailman.2233.1114097674.1799.python-list@python.org>
References: <d488q5$apl$1@solaris.cc.vt.edu>	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<mailman.2233.1114097674.1799.python-list@python.org>
Message-ID: <8uR9e.5555$r53.2021@attbi_s21>

Simon Brunning wrote:
> On 4/21/05, rbt <rbt at athop1.ath.vt.edu> wrote:
> 
>>string.between(data,[,])
> 
> 
> def between(data, start, end):
>     return re.findall(re.escape(start) + r'([^]]*)'+ re.escape(end), data)
>     

That's cool!
But it doesn't quite work if the end tag is not ']':

 >>> import re
 >>> def between(data, start, end):
... 	return re.findall(re.escape(start) + r'([^]]*)'+ re.escape(end), data)
...
 >>> foo = '''<stuff>   [lsass.exe]
... [System]  <more> stuff
... xxxxx<qqq> [firefox.exe] ......
... '''
 >>> print between(foo, '[', ']')
['lsass.exe', 'System', 'firefox.exe']
 >>> print between(foo, '<', '>')
['stuff', 'more> stuff\nxxxxx<qqq']


Here's a revised version that will work with other tags:

 >>> def between2(data, start, end):
... 	pattern = re.escape(start) + ' # start tag \n' +\
...           r'([^' + re.escape(end) + r']*)' + " # anything except end 
tag \n" +\
...           re.escape(end) + ' # end tag \n'
... 	return re.findall(pattern, data, re.VERBOSE)
...
 >>> print between2(foo, '[', ']')
['lsass.exe', 'System', 'firefox.exe']
 >>> print between2(foo, '<', '>')
['stuff', 'more', 'qqq']

Regards,
Jim Sizelove


From fredrik at pythonware.com  Tue Apr 12 01:46:28 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 07:46:28 +0200
Subject: help: loading binary image data into memory
References: <d3f6bo$2thb$1@news.wplus.net><20050412012905.GA3486@unpythonic.net>
	<d3f8jq$g32$1@sea.gmane.org>
Message-ID: <d3fn4r$ccu$1@sea.gmane.org>

Robert Kern wrote:

>> probably something like this: (untested)
>>     def make_ftplib_callback(f):
>>         def callback(block): f.write(block)
>>         return callback
>>     img = cStringIO.StringIO()
>>     retrbinary( "get ???", make_ftplib_callback(img))
>
> Ummm, how about
>
> img = cStringIO.StringIO()
> retrbinary("get ???", img.write)

if you want some additional code to run during download, you can
always do something like:

    img = cStringIO.StringIO()
    def callback(block):
        sys.stdout.write(".")
        img.write(block)
        if img.tell() > LIMIT:
            raise IOError("too much data")
    retrbinary(..., callback())

(you don't really have to create a factory if all you need is a single
function...)

you can also get rid of the cStringIO module :

    img = []
    retrbinary(..., img.append)
    # img is now a list of string chunks

might be more efficient, depending on what you plan to do with the
data once you've loaded it.

and finally,

    img = urllib.urlopen("ftp://...").read()

might also work.

</F> 





From Scott.Daniels at Acm.Org  Wed Apr 13 11:53:38 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 13 Apr 2005 08:53:38 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <roy-D9732C.08282913042005@reader1.panix.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
Message-ID: <425d3b01$1@nntp0.pdx.net>

Roy Smith wrote:
> In article <1113390479.738210.49530 at z14g2000cwz.googlegroups.com>,
>  "Dan Bishop" <danb_83 at yahoo.com> wrote:
> 
> 
>>But there's no reason other than tradition why you should arrange them
>>into groups of 10.
> 
> 
> Well, it is traditional for people to have 10 fingers :-)
> 
> Other fun things to think about are negative bases.  For example, 3(10) = 
> 111(-2).  That's 1*(-2)^2  + 1*(-2)^1 + 1*(-2)^0 = 4 - 2 + 1.  I can't 
> think of any use for negative bases, but they are a fun game to play with 
> (if you're into that sort of stuff).
> 
> Non-integer bases are fun too.

If you think those are fun, try base (1j - 1)

--Scott David Daniels
Scott.Daniels at Acm.Org


From serpent17 at gmail.com  Wed Apr 27 10:56:11 2005
From: serpent17 at gmail.com (serpent17 at gmail.com)
Date: 27 Apr 2005 07:56:11 -0700
Subject: How do I parse this ? regexp ?
Message-ID: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>

Hello all,

I have this line of numbers:


04242005 18:20:42-0.000002, 271.1748608, [-4.119873046875,
3.4332275390625, 105.062255859375], [0.093780517578125, 0.041015625,
-0.960662841796875], [0.01556396484375, 0.01220703125,
0.01068115234375]


repeated several times in a text file and I would like each element to
be part of a vector. how do I do this ? I am not very capable in using
regexp as you can see. 


Thanks in advance, 


Jake.



From sxanth at cs.teiath.gr  Sat Apr  9 11:17:27 2005
From: sxanth at cs.teiath.gr (stelios xanthakis)
Date: Sat, 09 Apr 2005 18:17:27 +0300
Subject: ANN: Python benchmark suite
Message-ID: <4257F207.1090004@cs.teiath.gr>

Hi

I'd like to announce the pyvmbench benchmark suite which is designed
to evaluate different python implementations, different versions of
the same implementation and different compilers/compilation flags for
the same version of a python implementation (same).  If you want,
you can of course benchmark Jython on Mac vs IronPython on XP!


It is located right here:
http://students.ceid.upatras.gr/~sxanth/pyvm/pyvmbench.tar.bz2

I've taken code from the "computer language shootout", posts in
c.l.py and other code from the internet which seems to be ok to
use.  Hopefully we should be ok.

Ok, the testcases are not many but they are all real programs
that do real jobs and this makes their results at least, realistic:)


Cheers,

Stelios


From michael.kearns at REMOVEsaaconsultants.com  Tue Apr 12 04:40:24 2005
From: michael.kearns at REMOVEsaaconsultants.com (Michael Kearns)
Date: Tue, 12 Apr 2005 09:40:24 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <425AF2AB.1030401@v.loewis.de>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
	<425AF2AB.1030401@v.loewis.de>
Message-ID: <425b8948$0$38045$bed64819@news.gradwell.net>

Martin v. L?wis wrote:

> For developers that need msvcr71.dll on the target system which don't
> have a license to distribute it, the solution is simple: they just need
> to advise their users to install python-2.4.1.msi. This comes with
> msvcr71.dll included.

I understand this, and it's obviously a solution. Unfortunately it 
defeats the whole point of me 'freezing' my code in the first place.

The main feature (for me) of the way I could use this, was to create a 
simple Java launcher that didn't require the user to install anything 
extra, or end up with a whole stack of unused data on their machine.

They would see a .exe file, a dll and a pyd, and then the actual 
application files, and that was it. It may be fine for a 'knowledgeable' 
user to install python etc., but not for everyone.

Michael.


From ivanlan at pauahtun.org  Wed Apr 13 21:25:02 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Wed, 13 Apr 2005 19:25:02 -0600
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<6.2.1.2.2.20050413181757.06a83c30@rcblue.com>
Message-ID: <425DC66E.394579B8@pauahtun.org>

Hi All--

Dick Moores wrote:
> 
> Dan wrote at 18:02 4/13/2005:
> >On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
> >wrote:
> >
> > > I'm just trying to help an artist acquaintance who needs (I just
> > >learned) the first 3003 digits of pi to the base 12.
> >
> >Now you've got me curious.  Why would an artist want the first 3003
> >digits of pi to the base 12?
> 
> He says,
> Do you know how I can get "base12 pi"?
> Because the chromatic scale is base12.
> c c# d d# e f f# g g# a a# b
> 

Oooh.  Wanta hear it.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From heiko.selber at siemens.com  Tue Apr 19 09:44:14 2005
From: heiko.selber at siemens.com (Heiko Selber)
Date: Tue, 19 Apr 2005 15:44:14 +0200
Subject: Name/ID of removable Media: how?
References: <mailman.2088.1113906469.1799.python-list@python.org>
Message-ID: <d431vo$3tq$1@news.mch.sbs.de>

Aah, nice. Thank you.

This should be included in pywin32, don't you think so? (Or is it? I didn't
check before installing.)

Heiko

"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message
news:mailman.2088.1113906469.1799.python-list at python.org...
[Heiko Selber]
| I am trying to find out (using Python under windows) the name
| of a CD that
| is currently in the drive specified by a path name.
|
| And while I am at it, I'd also like to know whether the
| specified drive
| contains a CD at all, and whether the drive is actually a CD drive.

Try this:

<code>
import wmi

c = wmi.WMI ()
for i in c.Win32_CDROMDrive ():
  print i.Caption, i.VolumeName, i.VolumeSerialNumber

</code>

I haven't answered all your questions, but I'm willing
to bet that you can do pretty much what you want with
WMI.

There are also the pywin32 functions which give you some
of this (maybe all, don't know; haven't tried).

More info here: http://timgolden.me.uk/python/wmi.html
and here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_cdromdrive.asp
and here: http://pywin32.sf.net

TJG




From neuhauser+python-list#python.org at sigpipe.cz  Sun Apr 10 07:21:20 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Sun, 10 Apr 2005 13:21:20 +0200
Subject: Signals and system
In-Reply-To: <42590634$0$29863$afc38c87@news.optusnet.com.au>
References: <42590634$0$29863$afc38c87@news.optusnet.com.au>
Message-ID: <20050410112120.GE76849@isis.sigpipe.cz>

# reply-to-group at use.net / 2005-04-10 20:55:05 +1000:
> Hi folks,
> 
> My python program needs to download a number of files.  Each file comes 
> as a list of mirrors of that file.
> 
> Currently, I am using system (os.system) to run wget.  The mechanism is 
> in a loop, so that it will try all the mirrors while wget is exiting 
> with a non-zero exit status.  This is working fine as long as the user 
> feels there is no need to interrupt it.
> 
> If wget receives a SIGINT, it stops (as expected) and returns non-zero 
> (1 from memory).  The call to system returns the same status code, 
> indicating that wget failed, but the program has no knowledge that it 
> was a signal the killed wget, rather than a failed download, and as such 
> it tries the next mirror.  I would like to be notified if wget received 
> any signals, so that the user doesn't need to repetitively press Ctrl-C 
> for each and every mirror to get the downloading process to stop.
> 
> Can someone point me in the right direction?

    http://docs.python.org/lib/os-process.html#l2h-1682

    "On Unix, the return value is the exit status of the process encoded
    in the format specified for wait()."

    http://docs.python.org/lib/os-process.html#l2h-1684

    "return a tuple containing its pid and exit status indication: a
    16-bit number, whose low byte is the signal number that killed the
    process, and whose high byte is the exit status (if the signal
    number is zero); the high bit of the low byte is set if a core file
    was produced"

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From peter at engcorp.com  Wed Apr  6 10:18:03 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 06 Apr 2005 10:18:03 -0400
Subject: how to parse system functions output
In-Reply-To: <mailman.1426.1112792464.1799.python-list@python.org>
References: <mailman.1426.1112792464.1799.python-list@python.org>
Message-ID: <H8qdnU3n67gHcs7fRVn-2g@powergate.ca>

praba kar wrote:
> eg) bytesused = os.system('du -sh /Users/enmail')
> if I print this bytesused variable the output of
> bytesused variable is the below
> 
> 14M     /Users/enmail
> 0

It's unlikely this is the contents of "bytesused",
because os.system() does not return the output
of the program that is run, it returns only the
exit value.  (See the doc.)  The "14M ..." part
is actually being printed by the "du" command
as it runs.  "bytesused" contains only the "0"
that you show above.

> Now From this Output I want only '14M" I cannot split
> this output by space.  If anyone know regarding this
> mail me ASAP

You are looking for either os.popen() or the newer,
more flexible "subprocess" module (available in
Python 2.4).  Again, check the docs for details and
examples for both of these.

Basically you would do this:

result = os.popen('du -sh /Users/enmail').read()
# now parse result...

-Peter


From glauco.silva at cenpra.gov.br  Mon Apr 18 08:05:47 2005
From: glauco.silva at cenpra.gov.br (Glauco Silva)
Date: Mon, 18 Apr 2005 09:05:47 -0300
Subject: Problem using py2exe
Message-ID: <00f101c5440e$f4c9e470$e87290c8@piau>

Hi,
I?m with problem to create a executable program in python. 
I?m using py2exe but i don?t know if it?s right.
My setup.py:

from distutils.core import setup
import py2exe
from glob import glob

setup(
    # The first three parameters are not required, if at least a
    # 'version' is given, then a versioninfo resource is built from
    # them and added to the executables.
    version = "2.0",
    description = "programa InVesalius",
    name = "InVesalius",

    # targets to build
    console = ["C:\\promed2.0\\python\\MyMainModule.py"],
    data_files=[("icons", glob("C:\\promed2.0\\icons\\*.*")),
                ("docs",glob("C:\\promed2.0\\docs\\*.*")),
                ("config", ["C:\\promed2.0\\setup.cfg"])
                ],    
    packages = ['vtk-windows', 'vtk-windows.vtk',
                'vtk-windows.vtk.gtk', 'vtk-windows.vtk.qt',
                'vtk-windows.vtk.tk', 'vtk-windows.vtk.util',
                'vtk-windows.vtk.wx', 'vtk-windows.vtk.test'],  
    )
When i run in prompt "python setup.py py2exe", appear in the end this:

###########
The following modules appear to be missing
[ '_imaging_gif','libVTKCommonPython', 'libVTKContribPython', 'libVTKGraphicsPython', 'libVTKImagingPython', 'libVTKPatentedPython', libvtkCommonPython', 'libvtkFilteringPython', 'libvtkGraphicsPython', 'libvtkHybridPython', 'libvtkIOPython', 'libvtkImagingPython', 'libvtkParallelPython', 'libvtkPatentedPython', 'libvtkRenderingPython', 'numarray.array', 'numarray.dot', 'numarray.fromfile', 'numarray.size', 'numarray.zeros', 'vtk.vtkActor2D', 'vtk.vtkDCMParser', 'vtk.vtkImageClip', 'vtk.vtkImageFlip', 'vtk.vtkImageImport', 'vtk.vtkImageMagnify', 'vtk.vtkImageMapper', 'vtk.vtkImagePermute', 'vtk.vtkImageReader', 'vtk.vtkImageResample', 'vtk.vtkImageReslice', 'vtk.vtkImageShiftScale', 'vtk.vtkImageThreshold', 'vtk.vtkImageViewer', 'vtk.vtkImageWriter', 'vtk.vtkRenderWindow', 'vtk.vtkRenderer', 'vtk.vtkTextMapper', 'vtk.vtkTextProperty', 'vtk.vtkTransform']
###########

My PYTHONPATH = C:\Python23;C:\promed2.0\vtk-windows;C:\promed2.0\python

My dir:
##########
promed2.0/
              setup.cfg
               setup.py
               icons/
  
               docs/
 
               python/
                           MyMainModule.py
                 
               vtk-window/
                            vtkpython.py
                            vtkpythontk.py

                            vtk.pth
                            vtkCommon.dll
                            vtkCommonPython.dll
                            vtkCommonTCL.dll
                                           ...

                            vtk/ 
###########

OS: win 2K
Python ver: 2.3.5
py2exe ver: 0.5.4

How can i solve this problem?

Thanks
Glauco
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From jeffrey at fro.man  Tue Apr 26 10:35:44 2005
From: jeffrey at fro.man (Jeffrey Froman)
Date: Tue, 26 Apr 2005 07:35:44 -0700
Subject: Quote-aware string splitting
References: <9Kgbe.24031$h6.523@tornado.texas.rr.com>
	<116rahd5t0lq85e@corp.supernews.com>
	<426de8f7.556450523@news.oz.net>
Message-ID: <116ske16i6jd62d@corp.supernews.com>

Bengt Richter wrote:

> Oops, note some spaces inside quotes near ss and missing double quotes in
> result.

And here I thought the main problem with my answer was that it didn't split
unquoted segments into separate words at all! Clearly I missed the
generalization being sought, and a more robust solution is in order.
Fortunately, others have been forthcoming with them.

Thank you,
Jeffrey


From joal at bigpond.net.au  Fri Apr  1 09:16:46 2005
From: joal at bigpond.net.au (Joal Heagney)
Date: Fri, 01 Apr 2005 14:16:46 GMT
Subject: New to programming question
In-Reply-To: <424d1573.11134991@news.oz.net>
References: <1112325275.120122.100800@o13g2000cwo.googlegroups.com>
	<0_63e.19914$C7.11056@news-server.bigpond.net.au>
	<B%63e.19916$C7.1024@news-server.bigpond.net.au>
	<424d1573.11134991@news.oz.net>
Message-ID: <iJc3e.20399$C7.2091@news-server.bigpond.net.au>

Bengt Richter wrote:
> On Fri, 01 Apr 2005 07:46:41 GMT, Joal Heagney <joal at bigpond.net.au> wrote:
> 
> 
>>Oh goddammmnitttt. I seem to be doing this a lot today. Look below for 
>>the extra addition to the code I posted.
>>
>>Joal Heagney wrote:
>>
>>>Here's my contribution anycase:
>>>
>>>count = 0
>>># Get first input
>>>name = raw_input("Guess my name: ")
>>># Give the sucker two extra goes
>>>while count < 2:
>>>    # Check the value of name
>>>    if name == 'Ben':
>>>        print "You're right!"
>>>        break
>>>    else:
>>>        name = raw_input("Try again: ")
>>
>>	  # Here's the bit I missed out.
>>	  count += 1
>>
>>># Of course, we haven't checked the sucker's last guess
>>># so we have to do that now.
>>>if count == 2:
>>>    if name == 'Ben':
>>>        print "You're right!"
>>>    else:
>>>        print "No more tries for you!!!"
>>>
>>>
>>>Hope this helps.
>>>Joal
>>
>>GRRRRRRRR.
>>
> 
> 
> Need something more straightforward, e.g., a wrapped one-liner:
> 
>  >>> def guess(n=3): print ("You're right!", 'No more tries for you!!!')[n-1 in
>  ...    (x for x in xrange(n) for t in [raw_input('Guess my name: ')=='Ben']
>  ...    if not t or iter([]).next())]

Okay, now in my opinion, that's just too complex to give to a newbie as 
a suggested implementation. :)

Joal


From rkern at ucsd.edu  Wed Apr 13 18:57:24 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 13 Apr 2005 15:57:24 -0700
Subject: numarray.array can be VERY slow
In-Reply-To: <d3iqej$mq3$1@scotsman.ed.ac.uk>
References: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
	<d3iqej$mq3$1@scotsman.ed.ac.uk>
Message-ID: <d3k7ue$nlk$2@sea.gmane.org>

Jim wrote:
> Edward C. Jones wrote:
> 
>> Steven Bethard wrote:
>>
>>  > As mentioned, this has nothing to do with numarray, and everything to
>>  > do with your inexplicable use of lists.  Why don't you just write this
>>  > as:
>>  >
>>  > arr = numarray.ones((8, 8, 256, 256), Float64)
>>
>> The code I posted was simplified from a larger program which I have 
>> now revised. But I still ask: why did it take 4.3 seconds to run?
> 
> 
> Is the simple answer not that repeated use of array.append is 
> inefficient as python has to repeatedly re-allocate memory for the array?

No, because he wasn't appending to arrays, he was appending to lists 
(each only 8 items long, so there really is no significant overhead). 
See my response in this thread for the answer.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From kasimov at i.com.ua  Wed Apr 27 02:57:29 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 27 Apr 2005 09:57:29 +0300
Subject: python equivalent of php implode
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<mailman.2520.1114531188.1799.python-list@python.org>
	<8664y8lyb2.fsf@guru.mired.org>
Message-ID: <d4ndag$2st8$1@news.tsystems.kiev.ua>






i'm tying to run example, and then get a traceback. am i something missed?

mysql> create table tmp_tmp (id int not null auto_increment primary key, sd
varchar(255) not null default '', si int not null default 1);

>>> import MySQLdb
>>> db = MySQLdb.connect("localhost", "login", "password", "dbname")
>>> c  = db.cursor()
>>> query_param = {
... 'sd' : 'somedata',
... 'si' : 2,
... }
>>> table = 'tmp_tmp'
>>> keys = query_param.keys()
>>> values = query_param.values()
>>> sql = "INSERT INTO %s (%s) values (%s)" % (table, ", ".join(keys), ",
".join(["?"] * len(keys))    )
>>> c.execute(sql, values)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.2/site-packages/MySQLdb/cursors.py", line 95,
in execute
    return self._execute(query, args)
  File "/usr/local/lib/python2.2/site-packages/MySQLdb/cursors.py", line
108, in _execute
    self.errorhandler(self, ProgrammingError, m.args[0])
  File "/usr/local/lib/python2.2/site-packages/MySQLdb/connections.py", line
33, in defaulterrorhandler
    raise errorclass, errorvalue
_mysql_exceptions.ProgrammingError: not all arguments converted




"Mike Meyer" <mwm at mired.org> ???????/???????? ? ???????? ?????????:
news:8664y8lyb2.fsf at guru.mired.org...
> Jeff Epler <jepler at unpythonic.net> writes:
>
> >     items = query_param.items()
> >     keys = [item[0] for item in items]
> >     values = [item[1] for item in items]
>
> Is there some reason not to do:
>
>    keys = query_params.keys()
>    values = query_params.values()
>
> That would seem to be a lot more obvious as to what was going on.
>
>      Thanks,
>      <mike
> --
> Mike Meyer <mwm at mired.org> http://www.mired.org/home/mwm/
> Independent WWW/Perforce/FreeBSD/Unix consultant, email for more
information.




From pyguy2 at gmail.com  Sat Apr 23 00:16:04 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 22 Apr 2005 21:16:04 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <4269397e.249385737@news.oz.net>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7xk6mvh5cn.fsf@ruckus.brouhaha.com>
	<1114172988.809457.36220@l41g2000cwc.googlegroups.com>
	<42691bbe.241769556@news.oz.net>
	<1114188913.806103.120830@f14g2000cwb.googlegroups.com>
	<4269397e.249385737@news.oz.net>
Message-ID: <1114229764.079444.145570@g14g2000cwa.googlegroups.com>

>>I think of it like the ''.join semantics. The object knows best how
to
>>handle join (even if it looks wierd to some people). In the #! case,
>>the program knows best how to start itself.

>This I don't understand ;-)

With  ','.join(['a','b','c'])    You rely on what wants to join the
sequence to handle the issue of joining rather than have the sequence
understand joining. I think of it as the object knows best.

I think of  #! as "the program knowing best" how to startup, rather
than having to rely on something else to deal with it. I also like the
text based simplicity and explictness. Just like text based "etc" files
on unix versus the registry in windows. And, if you want you can add
more power like use env variables in #!.
It can be as simple or as powerful as you need, you can use whatever
means you want to manage the #! line: text editors, other programs,
etc.  It is data-centric, just like http, sql, file I/O rather than
verb-centric (learn another whole set of methods to figure out how to
change startup).

hopefully I am making sense,

john



From Scott.Daniels at Acm.Org  Sun Apr  3 20:58:23 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 03 Apr 2005 17:58:23 -0700
Subject: unittest vs py.test?
In-Reply-To: <7xacofo1j0.fsf@ruckus.brouhaha.com>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <7x3bu8t7or.fsf@ruckus.brouhaha.com>
	<mailman.1272.1112567512.1799.python-list@python.org>
	<7xacofo1j0.fsf@ruckus.brouhaha.com>
Message-ID: <42508bf3$1@nntp0.pdx.net>

Paul Rubin wrote:
> "Terry Reedy" <tjreedy at udel.edu> writes:
> 
>>>But assert statements vanish when you turn on the optimizer.  If
>>>you're going to run your application with the optimizer turned on, I
>>>certainly hope you run your regression tests with the optimizer on.
>>
>>I don't see why you think so.  Assertion statements in the test code make 
>>it harder, not easier for the test to pass.  Ditto, I believe, for any in 
>>the run code, if indeed there are any.
> 
> 
> If the unit tests are expressed as assert statements, and the assert
> statements get optimized away, then running the unit tests on the
> optimized code can obviously never find any test failures.

Any code depending upon __debug__ being 0 won't be tested.  Sometimes
test structures update values as a side-effect of tracking the debugging
state.  Not massively likely, but it makes for a scary environment when
your tests cannot be run on a non-debug version.

--Scott David Daniels
Scott.Daniels at Acm.Org


From rbt at athop1.ath.vt.edu  Tue Apr  5 08:57:12 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 05 Apr 2005 08:57:12 -0400
Subject: check interpreter version before running script
Message-ID: <d2u1v8$n8t$1@solaris.cc.vt.edu>

Is there a recommended or 'Best Practices' way of checking the version 
of python before running scripts? I have scripts that use the os.walk() 
feature (introduced in 2.3) and users running 2.2 who get errors. 
Instead of telling them, 'Upgrade you Python Install, I'd like to use 
sys.version or some other way of checking before running.

Whatever I do, I need it to work on Linux, Mac and Windows.

I thought of sys.version... but getting info out of it seems awkward to 
me. First 5 chars are '2.4.1' in string format have to split it up and 
convert it to ints to do proper checking, etc. It doesn't seem that 
sys.version was built with this type of usage in mind. So, what is the 
*best* most correct way to go about this?

Thanks,

rbt


From bokr at oz.net  Thu Apr 14 01:35:24 2005
From: bokr at oz.net (Bengt Richter)
Date: Thu, 14 Apr 2005 05:35:24 GMT
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<425cefae.268278123@news.oz.net>
	<mailman.1825.1113388030.1799.python-list@python.org>
	<m6gr51ls0jqki5tva2cbh7so8kc5h7ltu5@4ax.com>
	<mailman.1865.1113441561.1799.python-list@python.org>
	<see-414FAA.23143013042005@news.frontiernet.net>
Message-ID: <425df968.336304930@news.oz.net>

On Thu, 14 Apr 2005 03:14:51 GMT, Doug Schwarz <see at sig.for.address.edu> wrote:

>In article <mailman.1865.1113441561.1799.python-list at python.org>,
> Dick Moores <rdm at rcblue.com> wrote:
>
>> Dan wrote at 18:02 4/13/2005:
>> >On Wed, 13 Apr 2005 03:27:06 -0700, Dick Moores <rdm at rcblue.com>
>> >wrote:
>> >
>> > > I'm just trying to help an artist acquaintance who needs (I just
>> > >learned) the first 3003 digits of pi to the base 12.
>> >
>> >Now you've got me curious.  Why would an artist want the first 3003
>> >digits of pi to the base 12?
>> 
>> He says,
>> Do you know how I can get "base12 pi"?
>> Because the chromatic scale is base12.
>> c c# d d# e f f# g g# a a# b
>> 
>> Dick
>
>Does your artist friend have any idea what base 12 means?
>
Maybe he wants to play sounds of pi and has found base 10 digits don't
hit all the notes, and he may not be as dumb as you think ;-)

>The chromatic scale is based on one twelfth powers of two, i.e., if the 
>frequency of a note in the scale is f(n), then the frequency of the next 
>note is given by
>
>  f(n+1) = f(n) * 2^(1/12)
>
>so by the time you go all 12 notes in an octave you have doubled the 
>frequency.  There is nothing here involving base 12 or pi.
>
I expect something interesting and imaginative ;-)
It might also be interesting to keep a running sum of the base 12 values
and use sum % 88 to select piano keys, to let it walk intervals outside
of a single octave ;-)

I found using different base digits to draw end-to-end vectors selected from
equal vectors equally spaced in all base directions for a "random" walk picture
was interesting. I also changed the color according to various criteria such
as digit run length ending on the current digit. Maybe the artist could scale
that up and put it on the wall as backdrop to the music ;-)
It would be easy to generate postscript for it, that could be scaled up and
printed wall size. Or pdf. I'm tempted to play with my pdf plotting toy and
maybe make it work ;-)

I'm kind of curious what the ear could pick up about pi from hearing the sequence
as notes. Or intervals, or grouped to make chords even. Anyone have an easy python
midi interface for windows to play on the sound card? I could generate a .wav file
to play tones, but midi would be much more compact ;-)

Regards,
Bengt Richter


From ahmedt at gmail.com  Wed Apr 20 16:07:31 2005
From: ahmedt at gmail.com (ATSkyWalker)
Date: 20 Apr 2005 13:07:31 -0700
Subject: What's the difference between these 2 statements?
In-Reply-To: <d46bvt$2l9$01$1@news.t-online.com>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
	<1114026007.999930.12850@f14g2000cwb.googlegroups.com>
	<d46bvt$2l9$01$1@news.t-online.com>
Message-ID: <1114027651.346726.147110@z14g2000cwz.googlegroups.com>

Peter,

I like the way you put it "the gap between the last and
the last but one character" :-).

I guess this is a side effect of of python's asymetric slice indexing
approach which takes a little getting used to.

AT



From bedouglas at earthlink.net  Tue Apr 12 13:46:22 2005
From: bedouglas at earthlink.net (bruce)
Date: Tue, 12 Apr 2005 10:46:22 -0700
Subject: python/svn issues....
Message-ID: <01a301c53f87$8ae38ab0$0301a8c0@Mesa.com>

hi...

in trying to get viewcvs up/running, i tried to do the following:

[root at lserver2 viewcvs-0.9.2]# python
Python 2.3.3 (#1, May  7 2004, 10:31:40)
[GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import svn.repos
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File
"/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
/svn/repos.py", line 19, in ?
  File
"/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
/svn/fs.py", line 28, in ?
  File
"/dar/tmp/subversion-1.1.4-0.1.1.fc2.rf-root/usr/lib/python2.3/site-packages
/libsvn/fs.py", line 4, in ?
ImportError: /usr/lib/libsvn_fs_base-1.so.0: undefined symbol: db_create
>>>
------------------------------------------------------------

the undefined symbol is obviously a deal breaker!!!

so, i'm trying to figure out what's going wrong...

i'm not sure if this is a python/svn error...

i'm on fedora core 2,
viewcvs from sourceforge.cvs
subversion-1.1.4-0.1.1.fc2 from dag repos (devel/perl)
db4-4.2.52-6

google turned up a few instances of this, but no solution.. any ideas as to
what's occuring...

thanks

bruce
bedouglas at earthlink.net




From peter at engcorp.com  Mon Apr 25 10:10:51 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 25 Apr 2005 10:10:51 -0400
Subject: Multiple tuples for one for statement
In-Reply-To: <mailman.2456.1114437838.1799.python-list@python.org>
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>	<200504251356.07715.james@wrong.nu>
	<426CF1D5.E9F4396@pauahtun.org>	<200504251457.28724.james@wrong.nu>
	<mailman.2456.1114437838.1799.python-list@python.org>
Message-ID: <JoCdna5WP9b3Z_HfRVn-vA@powergate.ca>

Ivan Van Laningham wrote:
> "R. C. James Harlow" wrote:
>>On Monday 25 April 2005 14:34, Ivan Van Laningham wrote:
>>>"R. C. James Harlow" wrote:
>>>>or just:
>>>>
>>>>for a,b,c in (tup1, tup2, tup3):
>>>>    print a
>>>>    print b
>>>>    print c
>>>
>>>And this works in Python version???
>>
>>Ah, reading the replies to the original post, this works but doesn't give the
>>result that the original poster wanted.
> 
> Define "works":

 >>> a = (1,2,3)
 >>> b = ('a','b','c')
 >>> c = (None, 'foo', 3.14)
 >>> tup1 = (1,2,3)
 >>> tup2 = ('a','b','c')
 >>> tup3 = (None, 'foo', 3.14)
 >>> for a,b,c in (tup1,tup2,tup3):
...   print a
...   print b
...   print c
...
1
2
3
a
b
c
None
foo
3.14
 >>>

It's a valid interpretation of the OP's
ambiguously stated requirements, though probably
not the right one.

-Peter


From gandalf at geochemsource.com  Fri Apr 22 15:52:32 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Fri, 22 Apr 2005 21:52:32 +0200
Subject: Python licence again
In-Reply-To: <1114197761.019100.38890@o13g2000cwo.googlegroups.com>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
Message-ID: <42695600.5080002@geochemsource.com>

fuzzylollipop wrote:

>try spelling license correctly next time and heading the google
>suggestions that probably looked like "didn't you mean : Python License"
>  
>
Oh yes, that was the problem. I'm not aware of that. Unfortunately, I'm 
not an American. I'm Hungarian
and my dictionary said 'licence' is correct. But I looked at 'license'. 
It means almost the same. :-)

Is it something like 'center' or 'color' for Americans and 'centre' or 
'colour' for British people?
(Sorry to be offtopic)

  Laci 2.0



-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!




From jeffelkins at earthlink.net  Wed Apr 27 07:10:24 2005
From: jeffelkins at earthlink.net (jeff elkins)
Date: Wed, 27 Apr 2005 11:10:24 +0000
Subject: Which IDE is recommended?
In-Reply-To: <426f90ac$1_2@rain.i-cable.com>
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <200504271110.24334.jeffelkins@earthlink.net>

On Wednesday 27 April 2005 01:16 pm, monkey wrote:
> Read through python site for programming tool, really plenty of choices :-)
> (For c++, I just can't breath with very very limited choices)
>
> Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
> develop?). But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
> also worth looking. Actually which one are you guys using? and why? I think
> it is also valuable for those who are new to python as me.

Is Boa actively used? There doesn't seem to be much activity its mailing list. 
The tutorial fails for me using python 2.3.5, wxpython 2.5.3.2 and Boa 0.4.0 
under debian sid.

Jeff



From Scott.Daniels at Acm.Org  Sat Apr  2 07:43:54 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 02 Apr 2005 04:43:54 -0800
Subject: Ternary Operator in Python
In-Reply-To: <roy-C95782.18531401042005@reader1.panix.com>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<mailman.1198.1112380413.1799.python-list@python.org>
	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
	<roy-C95782.18531401042005@reader1.panix.com>
Message-ID: <424e8e5a$1@nntp0.pdx.net>

Roy Smith wrote:
> ...  How our tools warp our thinking.

That is what it means to be human.  I can think of no better reason
for a programmer to regularly learn languages: "our tools warp our
thinking."  A programmer is a professionally warped thinker.

--Scott David Daniels
Scott.Daniels at Acm.Org




From stuff at slinkp.com  Wed Apr 13 13:51:03 2005
From: stuff at slinkp.com (Paul Winkler)
Date: 13 Apr 2005 10:51:03 -0700
Subject: HTTPSConnection script fails, but only on some servers (long)
References: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
	<d3ftlj$r3c$1@sea.gmane.org>
	<mailman.1824.1113387514.1799.python-list@python.org>
Message-ID: <1113414663.428740.86490@z14g2000cwz.googlegroups.com>

Thanks for the replies, Steve and Andreas!   I will check out pycurl,
thanks very much for the tip.

Meanwhile, I'm trying to prepare a bug report re. httplib and get as
much information as possible.

Something I neglected to mention: when the script hits the problematic
server, it always takes about 3 minutes to get the Bad Gateway
response. Don't know if that's indicative of anything.

I added a bunch of blather to httplib.py to see at what point things
are waiting, or if it was stuck in a loop or what. The result is pretty
clear:  we get as far as this point in SSLFile:

    def _read(self):
        buf = ''
        # put in a loop so that we retry on transient errors
        while True:
            try:
                buf = self._ssl.read(self._bufsize)

... at which point we simply wait for the server for three minutes,
Then a response finally comes back, no exceptions are caught or raised
within _read(), and finally _read()  returns buf. I can't easily trace
any deeper because self._ssl apparently comes from _ssl.so and I don't
fancy hacking at the C code.

Do these observations seem consistent with the hypothesis that
HTTPSConnection is failing to handle the HTTP 1.0 proxy?

I will also see what else I can find out from the admin. Maybe there's
more useful info in the logs somewhere.  Unfortunately IIRC our jboss
log is always clogged with a few zillion irrelevant messages ... that
should be fun.

-PW



From john at castleamber.com  Mon Apr 25 21:45:21 2005
From: john at castleamber.com (John Bokma)
Date: 26 Apr 2005 01:45:21 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
	<Xns9642A952FD589castleamber@130.133.1.4>
	<86y8b7pydc.fsf@guru.mired.org>
	<Xns9642C549BBBEFcastleamber@130.133.1.4>
	<86u0lvph0n.fsf@guru.mired.org>
	<Xns964392B70C958castleamber@130.133.1.4>
	<86mzrmo5j8.fsf@guru.mired.org>
	<Xns9643BBA1F1263castleamber@130.133.1.4>
	<pan.2005.04.26.00.01.53.726156@jerf.org>
Message-ID: <Xns9643D30F53131castleamber@130.133.1.4>

Jeremy Bowers wrote:

> On Mon, 25 Apr 2005 23:26:56 +0000, John Bokma wrote:
> 
>> Mike Meyer wrote:
>> 
>>> John Bokma <john at castleamber.com> writes:
> 
> Nobody ever changed their mind as a result of a 20-thread endless
> reply-fest. As usual, the posters aren't about to admit anything, and
> none of the bystanders are reading any more.

So why do you have that unstopable pathetic urge to contribute with whining 
to this thread? Aren't you able enough to configure your newsreader? Stay 
out of a thread if you have zero to add.

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


From andy at reportlab.com  Mon Apr 11 11:32:37 2005
From: andy at reportlab.com (andy at reportlab.com)
Date: Mon, 11 Apr 2005 08:32:37 -0700
Subject: Ten days to go until Python-UK...
Message-ID: <andyrobinson-0FTE2Ax8+IOkVioAMUN+UxdxQXsQKsk@mailblocks.com>

This is a reminder that there are just ten days left before the UK 
Python
Conference.  This is the one chance in the UK each year to hear 
in-depth
talks on a wide variety of topics from top Python experts. It
takes place at the Randolph Hotel in Oxford on 21-23 April.

     https://www.accu.org/conference/python.html

The Python event is part of the ACCU Conference which is one of the 
world's
leading events on C++, Java, patterns and development methods.

We are very happy to announce that Greg Stein will be flying in to
talk about "Python at Google" as our keynote talk.  We've got a
great array of talks on language features, GUIs, network programming,
testing tools, PyPy; and case studies and expertise from many of the 
key Python
companies and projects including Google, the BBC, SchoolTool, PyPy,
AB Strakt, Clocksoft and ReportLab.

Places are limited, so please register now at...
    https://www.accu.org/bookings/


Best Regards,

Andy Robinson
ACCU Python Conference Chair



From 665 at neighborofthebeast.com  Tue Apr 12 07:03:26 2005
From: 665 at neighborofthebeast.com (beelzabubba)
Date: Tue, 12 Apr 2005 11:03:26 GMT
Subject: =?iso-8859-1?q?Re=3A_THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60_=28newsgroup?=
References: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>
	<E6V5e.31837$hU7.10036@newssvr33.news.prodigy.com>
	<1113074212.618866.24620@f14g2000cwb.googlegroups.com>
	<MSN6e.4359$go4.130@newsread2.news.atl.earthlink.net>
Message-ID: <Xns96363E05DFA14beelzabubba@216.77.188.18>

"sheltech" <quasara at earthlink.net> wrote in
news:MSN6e.4359$go4.130 at newsread2.news.atl.earthlink.net: 

> 
> "Soy Bomb" <whocaresrmb at yahoo.com> wrote in message
> news:1113074212.618866.24620 at f14g2000cwb.googlegroups.com...
>> "The Holy Bible descibes Hell as a place of
>> eternal torment, suffering, pain and agony
>> for all those who have rejected Jesus Christ. "
>>
>> Sounds like the USA 2005.
>>
> 
> and what's worse is that it smells like teen spirit .
> a generation of kids growing up being taught  superstition instead of
> science,
> in this day and age ? . sanctioned by otherwise presumably
> intelligent, educated people holding public office ?. unfreaking
> believable, in this day and age . what  *^&$*$ planet did I wake up on
> ?. I'm all for  us exploring
> our spiritual nature , but  everything in it's place , and  some
> things are just
> so obviously metaphorical , allegorical, or just plain storytelling ,
> that it's
> stupid to take them literally .  f#kin freaks  (^:#  ....
> 
> 
> 
> 
> 

Jesus loves you sheltech.


From lbates at syscononline.com  Thu Apr 28 09:21:31 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 28 Apr 2005 08:21:31 -0500
Subject: Question about python code distribution...
In-Reply-To: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
References: <1114658428.295091.78500@f14g2000cwb.googlegroups.com>
Message-ID: <vamdnY5DgJLcfu3fRVn-vA@comcast.com>

You didn't say what platform, but if it is Windows take a
look at Inno Installer.  It is a complete installation
framework that allows you to package everything into a
single setup.exe file.  I use a combination of py2exe and
Inno to do my apps that are to be distributed.  Nothing
could be simpler.

-Larry Bates

draghuram at gmail.com wrote:
> Hi,
> 
> I am sure that this question might have come up repeatedly. Companies
> may not want to distribute their python code in source form. Even
> though pyc files are one option, it gets inconvenient to distribute
> bunch of them . If there is some way to bundle pyc files (akin to
> .jar), it would be really nice. I understand that pyc files are not
> hard to decompile (from my reading of previous posts) and module
> startup times may be longer if they have to be read from an archive.
> Neverthless, an option to distribute in the form of an archive is
> attractive. Has this ever been considered for Python? If one were to
> consider it, what would be pros and cons of such approach?
> 
> Any comments are appreciated.
> 
> Thanks,
> Raghu.
> 


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 13:22:48 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 18:22:48 +0100
Subject: preallocate list
In-Reply-To: <425d4a82$0$10793$626a14ce@news.free.fr>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j5t4$nqg$1@scotsman.ed.ac.uk>
	<d3j569$5tr$1@solaris.cc.vt.edu> <op.so6ehvehpda12i@localhost>
	<d3jes1$onj$1@scotsman.ed.ac.uk>
	<425d4a82$0$10793$626a14ce@news.free.fr>
Message-ID: <d3jkfs$p69$1@scotsman.ed.ac.uk>

F. Petitjean wrote:
> Le Wed, 13 Apr 2005 16:46:53 +0100, Jim a ?crit :
> 
>>What I really want is a Numeric array but I don't think Numeric supports 
>>importing files.
> 
> Numeric arrays can be serialized from/to files through pickles :
> import Numeric as N
> help(N.load)
> help(N.dump)
> (and it is space efficient)
> 
>>Jim
Yeah thanks. I'm generating them using Matlab though so I'd have to get 
the format the same. I use Matlab because I get the results I want. When 
I get to know Python + scipy etc. better I might remove that step.

Thanks again

Jim


From davidf at sjsoft.com  Mon Apr 18 04:11:50 2005
From: davidf at sjsoft.com (David Fraser)
Date: Mon, 18 Apr 2005 10:11:50 +0200
Subject: Apache mod_python
In-Reply-To: <np866115k5mee8odb7msitsr03npskcqjf@4ax.com>
References: <np866115k5mee8odb7msitsr03npskcqjf@4ax.com>
Message-ID: <d3vq44$is5$2@ctb-nnrp2.saix.net>

Dan wrote:
> I've been writing a server application in Python.  The app listens on
> a socket and interfaces to a database.
> 
> Now I'd like to write a web application to also access the database.
> It seems natural to use Python.  I've installed mod_python (Debian
> libapache2-mod-python2.3, mod_python 3.1.3-4).
> 
> My question is, how mature/stable is mod_python?  Is it suitable for a
> production environment?  The documentation is a bit lacking, and I've
> found some errors in the demo example where it looks like the link
> should work, but it doesn't. (Could well be something I'm doing.).
> I've also noted that there's still work being done on it.

Hi Dan

mod_python is quite mature and stable and usable in a production 
environment. However it is fairly low level and a lot of people like to 
add another framework on top of it.
If you point out the documentation problems you're having then people 
can say whether you're making a mistake or there is really an error

David


From lbates at syscononline.com  Thu Apr  7 11:05:07 2005
From: lbates at syscononline.com (Larry Bates)
Date: Thu, 07 Apr 2005 10:05:07 -0500
Subject: struct enhancements?
In-Reply-To: <1112885184.815268.265560@l41g2000cwc.googlegroups.com>
References: <1112885184.815268.265560@l41g2000cwc.googlegroups.com>
Message-ID: <us6dnXg8F42W0cjfRVn-gw@comcast.com>

Can't address the 8-byte longs, but to strip off null padding
in strings you merely do

s=s.rstrip('\x00')

Larry Bates


lee_merrill at yahoo.com wrote:
> Hi everyone,
> 
> I would like to be able to pack/unpack 8-byte longs, and have strings
> with null padding to be able to have the nulls trimmed off
> automatically.
> 
> Just thought I would mention these two items on my wish list, since I
> searched a bit, and haven't yet found a mention of this...
> 
> Regards,
> Lee
> 


From python-url at phaseit.net  Mon Apr 18 18:08:05 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 18 Apr 2005 22:08:05 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 18)
Message-ID: <d417ui$296$1@lairds.us>

QOTW: "Darn. I finally say something that gets into Quote of the Week,
and it's attributed to someone else!" -- Greg Ewing (we think)
    http://groups-beta.google.com/group/comp.lang.python/msg/15b836a557afccb2

"If there were something wrong with the API, Guido would have long since
fired up the time machine and changed the timeline so that all would be
as right as rain." - Raymond Hettinger

"Get real.  I can't imagine using anything so complex." -- Scott David
Daniels, in response to a suggestion to try (1j-1) as a counting base

        
    Continuations for Curmudgeons:
        http://www.intertwingly.net/blog/2005/04/13/Continuations-for-Curmudgeons

    Textual watermarks with Python Imaging Library:
        http://www.livejournal.com/users/gniemeyer/10279.html

    The new Python Cookbook is out of date already:
        http://42.blogs.warnock.me.uk/2005/04/oreillycom_onli.html
        
    Thunks for nothing:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/bbb6f71ff27f83a6/282bc755d5be3f62
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6e50601e8b1d8d18/db4f746b8b4d76ea
        
    A tutorial for building a simple to-do list application using WSGIKit, SQLObject, and Zope Page Templates:
        http://wsgikit.org/docs/TodoTutorial.html
        
    What can WSGIKit do for you?
        http://blog.ianbicking.org/what-can-wsgikit-do-for-you.html
        
    The Participatory Culture Foundation's desktop video player - video
    over BitTorrent:
        http://www.participatoryculture.org/
        
    Next-generation distributed version control:
        http://www.bazaar-ng.org/
        
    Will LAMP eclipse Java?
        http://news.com.com/2061-10795_3-5663085.html
        
    Does the fact that Python 2.4 is built using VC++ on Windows give us
    a problem?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/bccb45b7dae7ddd5/7a91ce5a9541221c
        
    Look up IP addresses by country:
        http://www.livejournal.com/users/zestyping/111325.html
        
    Python 2.3.2 for PalmOS:
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1d835f30343cabec/4efb02adafe3f7b5
        

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From bokr at oz.net  Tue Apr 12 19:40:10 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 12 Apr 2005 23:40:10 GMT
Subject: singleton objects with decorators
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<1113300588.335527.26290@o13g2000cwo.googlegroups.com>
	<d3gan3$ki5$1@news2.rz.uni-karlsruhe.de>
	<1113310269.596284.136100@f14g2000cwb.googlegroups.com>
	<d3glck$s7u$1@news2.rz.uni-karlsruhe.de>
	<1113318042.836605.132820@o13g2000cwo.googlegroups.com>
Message-ID: <425c3823.221291079@news.oz.net>

On 12 Apr 2005 08:00:42 -0700, "Michele Simionato" <michele.simionato at gmail.com> wrote:

>I did not put memoize on __new__. I put it on the metaclass __call__.
>Here is my memoize:
>
> def memoize(func):
>     memoize_dic = {}
>     def wrapped_func(*args):
>         if args in memoize_dic:
>             return memoize_dic[args]
>         else:
>             result = func(*args)
>             memoize_dic[args] = result
>             return result
>     wrapped_func.__name__ = func.__name__
>     wrapped_func.__doc__ = func.__doc__
>     wrapped_func.__dict__ = func.__dict__
>     return wrapped_func
>
> class Memoize(type): # Singleton is a special case of Memoize
>     @memoize
>     def __call__(cls, *args):
>         return super(Memoize, cls).__call__(*args)
>
Thanks, that is nice and simple, though caching instances of a class
according to initialization parameters is not quite the same concept
as singleton instances, I think. OTOH, if you want to pass differing
parameters to the same instance of a class, there are lots of methods
(pun ;-) to do that that are clearer than (ab)using the constructor interface.
I.e., what is the difference between shared access to a callable instance
in a module vs shared access to a strange class in the same place?

Hm, just had a thought re memoize: you could give it its own optional
hashing function as a keyword argument, and let it use that as a key
for memoize_dic. Then you could use that to make a singleton(-making) class
or a dual/doubleton-making class like bool, e.g., Bool below

----< memoize.py >--------------------------------------------------------
def memoize(arghash=lambda args:args, method=False):
    def _memoize(func):
        memoize_dic = {}
        def wrapped_func(*args):
            key = arghash(args[method:])
            if key in memoize_dic:
                return memoize_dic[key]
            else:
                result = func(*args)
                memoize_dic[key] = result
                return result
        wrapped_func.__name__ = func.__name__
        wrapped_func.__doc__ = func.__doc__
        wrapped_func.__dict__ = func.__dict__
        return wrapped_func
    return _memoize

def mkPolyton(arghash=lambda args:args):
    class Memoize(type):  # Singleton is a special case of Memoize
        @memoize(arghash, True) # (with arghash=lambda args:0 -> singleton)
        def __call__(cls, *args):
            return super(Memoize, cls).__call__(*args)
    return Memoize

class Bool(int):
    __metaclass__ = mkPolyton(lambda args:args and args[0] and 1 or 0)
    def __repr__(self): return ('False', 'True')[self]
    __str__ = __repr__

def tests(todo):
    if '1' in todo:
        @memoize()
        def square(x): return x*x
        print '[id(square(1234))...]: ten have same id:', [id(square(1234))
            for x in xrange(10)].count(id(square(1234))) == 10
    if '2' in todo:
        F = Bool(0) # init cache with proper False value
        T = Bool(1) # ditto for True value
        print 'T:', T, id(T)
        print 'F:', F, id(F)
        print '[id(Bool(1..10))...]: ten have same id:', [id(Bool(x))
            for x in xrange(1,11)].count(id(T)) == 10
        
if __name__ == '__main__':
    import sys
    tests(sys.argv[1:])
--------------------------------------------------------------------------
Result (not exactly a thorough test ;-):

[16:36] C:\pywk\ut>py24 memoize.py 1 2
[id(square(1234))...]: ten have same id: True
T: True 49271436
F: False 49271884
[id(Bool(1..10))...]: ten have same id: True

BTW, I found this page interesting:
    http://c2.com/cgi/wiki?SingletonPattern


Regards,
Bengt Richter


From http  Fri Apr  1 23:47:49 2005
From: http (Paul Rubin)
Date: 01 Apr 2005 20:47:49 -0800
Subject: Simple thread-safe counter?
Message-ID: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>

I'd like to have a function (or other callable object) that returns
0, 1, 2, etc. on repeated calls.  That is:

    print f()   # prints 0
    print f()   # prints 1
    print f()   # prints 2
    # etc.

There should never be any possibility of any number getting returned
twice, or getting skipped over, even if f is being called from
multiple threads.

What's the simplest and most natural way to do this?  I can think of a
few but am not sure that they work.  And I can think of some ways that
are sure to work, but are messier than I'd like.


From ksenia.marasanova at gmail.com  Wed Apr 13 16:09:59 2005
From: ksenia.marasanova at gmail.com (Ksenia Marasanova)
Date: Wed, 13 Apr 2005 22:09:59 +0200
Subject: templating system
In-Reply-To: <196dnbltDvtpFsHfRVn-uA@speakeasy.net>
References: <mailman.1644.1113148510.1799.python-list@python.org>
	<ho-dnRDXra5RSMTfRVn-qQ@speakeasy.net>
	<mailman.1669.1113204074.1799.python-list@python.org>
	<196dnbltDvtpFsHfRVn-uA@speakeasy.net>
Message-ID: <130df1930504131309252ee3ce@mail.gmail.com>

> In the interests of full disclosure, I'm the author of EmPy.
> 
Cool :)

> All I meant by that note was that EmPy was not primarily designed for
> blazing speed; that is, it could easily be made much more efficient in a
> lot of ways.  I've never had a need to do so, so it's always been low
> priority.  I've certainly never heard of any complaints of EmPy's speed
> (or lack therefore) as being a problem in the field.  Unless you huge
> realtime demands, I doubt EmPy's speed would be a major impediment.  (Of
> course, if you find that it is, please tell me!)

No huge demands, just simple templating for a database-driven website.
I'll give EmPy a try, thank you.

-- 
Ksenia


From cookedm+news at physics.mcmaster.ca  Thu Apr  7 16:34:19 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 07 Apr 2005 16:34:19 -0400
Subject: curious problem with large numbers
References: <mailman.1503.1112903288.1799.python-list@python.org>
Message-ID: <qnkfyy2gwc4.fsf@arbutus.physics.mcmaster.ca>

Chris Fonnesbeck <fonnesbeck at gmail.com> writes:

> I have been developing a python module for Markov chain Monte Carlo
> estimation, in which I frequently compare variable values with a very
> large number, that I arbitrarily define as:
>
> inf = 1e10000
>
> However, on Windows (have tried on Mac, Linux) I get the following behaviour:
>
>>>> inf = 1e10000
>>>> inf
> 1.0
>
> while I would have expected:
>
> 1.#INF
>
> Smaller numbers, as expected, yield:
>
>>>> inf = 1e100
>>>> inf
> 1e+100
>
> Obviously, I cannot use the former to compare against large (but not
> infinite) numbers, at least not to get the result I expect. Has anyone
> seen this behaviour?

I don't do Windows, so I can't say this will work, but try

>>> inf = 1e308*2

I think your problem is how the number is being parsed; perhaps
Windows is punting on all those zeros? Computing the infinity may or
may not work, but it gets around anything happening in parsing.

Alternatively, if you have numarray installed (which you should
probably consider if you're doing numerical stuff ;-) you could use

>>> import numarray.ieeespecial
>>> numarray.ieeespecial.plus_inf
inf

(there's minus_inf, nan, plus_zero, and minus_zero also)

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From cam.ac.uk at mh391.invalid  Mon Apr 25 05:52:48 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Mon, 25 Apr 2005 10:52:48 +0100
Subject: Changing a line in a text file
In-Reply-To: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
References: <1114421951.029066.190120@g14g2000cwa.googlegroups.com>
Message-ID: <d4iell$bq9$2@gemini.csx.cam.ac.uk>

kah wrote:
> How do I change a line in a file??
> 
> For example I have the follwing text in my file:
> 
> line1
> line2
> line3
> line4
> 
> How do I replace 'line2' with 'newline'. Since the write operation in
> python will  overwrite everything.

This is the best I can figure out what you mean:

lines = []
for line in file("myfile.txt"):
     if line == "line2\n":
         line = "newline\n"
     lines.append(line)

file("myfile.txt", "W").writelines(lines)

-- 
Michael Hoffman


From steven.bethard at gmail.com  Tue Apr 12 04:01:05 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 12 Apr 2005 02:01:05 -0600
Subject: singleton objects with decorators
In-Reply-To: <d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
Message-ID: <hPCdnbuFntzcHcbfRVn-hA@comcast.com>

Uwe Mayer wrote:
> Tuesday 12 April 2005 06:36 am Steven Bethard wrote:
> 
>>Uwe Mayer wrote:
>>
>>>I've been looking into ways of creating singleton objects.
>>
>>It strikes me that I've never wanted or needed a singleton object.
>>Would you mind sharing your use case?  I'm just curious.
> 
> I am using a class to manage configuration settings in an application. This
> object should only existe once so that when the user
> changes a setting through a configuration dialog the change imminent in all
> locations where access to config settings are needed.

Ahh, I see.  I would typically just use a module in this situation, 
where the configuration settings were just names global to the module. 
Is there a benefit to using a singleton object over using just a module?

STeVe


From bokr at oz.net  Thu Apr 28 22:04:46 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 29 Apr 2005 02:04:46 GMT
Subject: regex over files
References: <426D0659.7080307@chamonix.reportlab.co.uk>
	<426D08BC.1040703@klix.ch>
	<mailman.2469.1114444689.1799.python-list@python.org>
	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>
	<426E021E.8000809@jessikat.fsnet.co.uk>
	<17006.31984.182979.430076@montanaro.dyndns.org>
	<426E893D.2070905@chamonix.reportlab.co.uk>
	<mailman.2543.1114545234.1799.python-list@python.org>
	<426EAA9D.2050904@jessikat.fsnet.co.uk>
	<pan.2005.04.26.21.39.15.988504@jerf.org>
	<4271491F.9040500@jessikat.fsnet.co.uk>
Message-ID: <42718997.173062991@news.oz.net>

On Thu, 28 Apr 2005 20:35:43 +0000, Robin Becker <robin at SPAMREMOVEjessikat.fsnet.co.uk> wrote:

>Jeremy Bowers wrote:
>....
> >
> > As you try to understand mmap, make sure your mental model can take into
> > account the fact that it is easy and quite common to mmap a file several
> > times larger than your physical memory, and it does not even *try* to read
> > the whole thing in at any given time. You may benefit from
> > reviewing/studying the difference between virtual memory and physical
> > memory.
>I've been using vm systems for 30 years and I suspect my mental model is a bit
>decrepit. However, as convincingly demonstrated by testing my mental model seems
>able to predict low memory problems. When systems run out of memory they tend to
>perform poorly. I'm not sure the horrible degradation I see with large files is
>necessary, but I know it occurs on at least two common vm implementations.

It's interesting. One could envisage an mmap that would hava a parameter for its own
lru working set max page count, so mmap would only displace up to that many
pages from normal system paged-in file data. Then you could induce extra
reads by referring back to abandoned mmap-lru pages, but you wouldn't be
displacing anything else, and if you were moving sequentially and staying within
your page residency count allotment, things would work like the best of both worlds
(assuming this idea doesn't have a delusion-busting gotcha lurking ;-) 
But this kind of partitioning of VM lru logic would take some kernel changes IWT.

IIRC, don't mmap VM access ideas date back to multics at least?
Anyway, what with fancy controllers as well as fancy file systems and kernels,
it's easy to get hard-to-interpret results, but your large-file examples seem
pretty conclusive.

Regards,
Bengt Richter


From ivoras at fer.hr  Mon Apr 25 12:14:22 2005
From: ivoras at fer.hr (Ivan Voras)
Date: Mon, 25 Apr 2005 18:14:22 +0200
Subject: PyGTK vs. wxPython
In-Reply-To: <116q56ie4vqtu04@corp.supernews.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<116q56ie4vqtu04@corp.supernews.com>
Message-ID: <d4j51p$rut$1@bagan.srce.hr>

Grant Edwards wrote:

> Huh?  wxPythonGTK requires GTK runtimes as well:

He was probably talking about Windows, where wx toolkit uses native 
(more or less...) controls.

But then, installing GTK runtime libraries on Windows is a one-click 
job, there are automated installers for it.


From t.bettio at buonviciniag.ch  Mon Apr  4 06:52:25 2005
From: t.bettio at buonviciniag.ch (tc)
Date: 4 Apr 2005 03:52:25 -0700
Subject: What's up with the PyFX Project??? (ex PyCG nVidia CG
	implementation)
Message-ID: <1112611945.600073.89550@g14g2000cwa.googlegroups.com>

Does anyone know why there's no progress on the pyfx project??
(http://graphics.cs.lth.se/pyfx)

What are the pro and con's for such an implementation to actually
program a 3d game (engine)??

I started off a while ago in c++ to play around a bit with directx
opengl and cg but I'd rather like to program in a language such as
python...

PyGame doesn't meet my need's because i'd like to take adantage of the
much faster directx technology.

Any comments, hints?

Greets TC



From jason.mobarak at gmail.com  Wed Apr 27 21:36:26 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 27 Apr 2005 18:36:26 -0700
Subject: Shutting down twisted reacotr
In-Reply-To: <d4oqhj$he4$1@news-int2.gatech.edu>
References: <d4oqhj$he4$1@news-int2.gatech.edu>
Message-ID: <1114652186.103374.240070@o13g2000cwo.googlegroups.com>

Why do you want to do this in a thread? What's wrong with
reactor.callLater?

import time
from twisted.internet import reactor

def shutdown():

    time.sleep(3)
    print "stopping"
    reactor.callFromThread(reactor.stop)

reactor.callInThread(shutdown)
reactor.run()



From skip at pobox.com  Tue Apr 19 14:00:17 2005
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 19 Apr 2005 13:00:17 -0500
Subject: gc.DEBUG_LEAK and gc.garbage
In-Reply-To: <d8768f2d.0504190928.35411d46@posting.google.com>
References: <d8768f2d.0504190928.35411d46@posting.google.com>
Message-ID: <16997.18225.962415.612313@montanaro.dyndns.org>


    Cesar> I have set the DEBUG_LEAK flag with the GC and in the program
    Cesar> cycle printed the length of the garbage list. Is this enough to
    Cesar> determine if there is a leak in the python code? (the value
    Cesar> rises).

That suggests to me that you have objects with __del__ methods that are
involved in cycles.  Get rid of the __del__ methods or figure out some way
to break the cycles.

    Cesar> Finally, in this group I have seen a reference to an article in
    Cesar> which they had the look to gc.garbage after calling explicitally
    Cesar> to gc.collect(). is this necessary?

Generally, no, but if you want to make sure the collector has run when you
want to look at gc.garbage it's convenient to call gc.collect() first.

Skip


From hancock at anansispaceworks.com  Sat Apr 23 00:52:07 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 22 Apr 2005 23:52:07 -0500
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <42698692$1@nntp0.pdx.net>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
	<mailman.2320.1114211454.1799.python-list@python.org>
	<42698692$1@nntp0.pdx.net>
Message-ID: <200504222352.07481.hancock@anansispaceworks.com>

On Friday 22 April 2005 06:44 pm, Scott David Daniels wrote:
> Terry Hancock wrote:
> > On Friday 22 April 2005 05:18 pm, mehmetmutigozel at gmail.com wrote:
> > 
> > Perhaps you don't know how to call such functions?  E.g.:
> > a=[ lambda t: t**n for n in range(4) ]
> >>>>a[2](3)
> > 27
> 
> Didn't you notice this was a funny value?

Nope. Wasn't paying attention. ;-)

Just copied the code from the OP.

> Perhaps you mean:
>       a = [lambda t, n=n: t**n for n in range(4)]

This is of course what he should've written, and/or what I
should've corrected it to, thank you. 

Cheers,
Terry


--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From gaudetteje at gmail.com  Sat Apr  2 09:23:00 2005
From: gaudetteje at gmail.com (NavyJay)
Date: 2 Apr 2005 06:23:00 -0800
Subject: __init__ method and raising exceptions
In-Reply-To: <424d7635$1@nntp0.pdx.net>
References: <1112325129.473015.266740@l41g2000cwc.googlegroups.com>
	<Pine.GSO.4.44.0503312343170.26126-100000@epic19.Stanford.EDU>
	<424d7635$1@nntp0.pdx.net>
Message-ID: <1112451780.326979.80730@o13g2000cwo.googlegroups.com>

Or better yet, define your own string/class exception to catch your
errors.  In my code, things can break in more than a few ways.  In each
case I catch the exception(s) specific to that piece of code, print a
warning message to the user at sys.stdout and raise a new exception to
be caught by my "wrapper" exception clause.



From kirk at jobsluder.net  Sun Apr 24 13:30:22 2005
From: kirk at jobsluder.net (Kirk Job Sluder)
Date: Sun, 24 Apr 2005 17:30:22 GMT
Subject: Variables
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
	<mailman.2368.1114311072.1799.python-list@python.org>
	<426b0d03_3@newspeer2.tds.net>
	<mailman.2371.1114313829.1799.python-list@python.org>
Message-ID: <873btg6pzp.fsf@debian.kirkjobsluder.is-a-geek.net>

Richard Blackwood <richardblackwood at cloudthunder.com> writes:

> Kent Johnson wrote:
> That is exactly how I feel about it. Foo is what it is. Variable, name
> bound to immutable value, etc., what we call it doesn't really change
> how I program, only how I communicate with other programmers (and
> mathematicians). Is the notion of variable not a fundamental concept
> in programming?  Surely there must be an unambiguous definition I can
> relay to him.

Well, if you want to be precise, in python Foo is a pointer that holds
the memory location of an object, that just happens to be int(5). Which
is one of the key differences between computer languages and
mathematics.  The value of a variable does not necessarily have meaning
as a number, but can be a character, string, or reference instead.  If I
say, foo = 'a', then in most cases I'm not really concerned about the
numeric sum of foo + 'b'.

But the argument at stake here is not technical, but linguistic.  If he
insists on imposing a definition from the domain of math onto the domain
of computer programming, then there is no point in continuing the
discussion about how the term "variable" is used in computer programming.  

-- 
Kirk Job-Sluder
"The square-jawed homunculi of Tommy Hilfinger ads make every day an
existential holocaust."  --Scary Go Round


From dsalomoni at gmail.com  Tue Apr  5 06:34:41 2005
From: dsalomoni at gmail.com (Davide Salomoni)
Date: 5 Apr 2005 03:34:41 -0700
Subject: monitoring folder in python
References: <1112680205.659755.211400@z14g2000cwz.googlegroups.com>
Message-ID: <1112697281.937697.106530@l41g2000cwc.googlegroups.com>

A straw-man solution in Python that monitors a directory for changes
(Linux only):

#!/usr/bin/env python2

import sys
import os

if sys.platform not in ("linux2",):
    sys.exit("%s only runs on Linux" % os.path.basename(sys.argv[0]))

# TODO: we should check that kernel version >= 2.4.19
# e.g. with 'uname -r'

import fcntl
import signal

TESTDIRECTORY = "."

def notify(directory, handler):
    fd = os.open(directory, os.O_RDONLY)
    fcntl.fcntl(fd, fcntl.F_NOTIFY,
fcntl.DN_ACCESS|fcntl.DN_MODIFY|fcntl.DN_CREATE)
    signal.signal(signal.SIGIO, handler)

def handler(signum, frame):
    print "Something happened; signal =", signum

if __name__ == "__main__":
    notify(TESTDIRECTORY, handler)
    try:
        signal.pause() # sleep until signal received
    except KeyboardInterrupt:
        pass

With Python 2.4 one could bind e.g. to signal.SIGRTMIN instead of the
default SIGIO and get additional info, as suggested by the C example in
Documentation/dnotify.txt (look in the Linux src tree). But then I am
note sure you can access a siginfo structure directly from Python. With
the example above, one would probably write the handler so that it
rescans the directory when called to detect what actually changed.

Davide



From radam2 at tampabay.rr.com  Tue Apr  5 15:34:54 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 19:34:54 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
Message-ID: <umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>

On Tue, 05 Apr 2005 02:55:35 -0400, Steve Holden <steve at holdenweb.com>
wrote:

>Ron_Adam wrote:
>> Ok, that post may have a few(dozen?) problems in it.  I got glitched
>> by idles not clearing variables between runs, so it worked for me
>> because it was getting values from a previous run.
>> 
>> This should work better,  fixed a few things, too.
>> 
>> The decorators can now take more than one argument.
>> The function and arguments lists initialize correctly now.
>> 
>Ron:
>
>I've followed your attempts to understand decorators with interest, and 
>have seen you engage in conversation with many luminaries of the Python 
>community, so I hesitate at this point to interject my own remarks.

I don't mind.  It might help me communicate my ideas better.

>In a spirit of helpfulness, however, I have to ask whether your 
>understanding of decorators is different from mine because you don't 
>understand them or because I don't.

Or it's just a communication problem, and we both understand.
Communicating is not my strongest point. But I am always willing to
clarify something I say.

>You have several times mentioned the possibility of a decorator taking 
>more than one argument, but in my understanding of decorators this just 
>wouldn't make sense. A decorator should (shouldn't it) take precisely 
>one argument (a function or a method) and return precisely one value (a 
>decorated function or method).
>
>> It doesn't work with functions with more than one variable.  It seems
>> tuples don't unpack when given to a function as an argument.  Any way
>> to force it?

What I was referring to is the case:

    @decorator(x,y,z) 

As being a decorator expression with more than one argument.  and not:

    @decorator(x)(y)

This would give a syntax error if you tried it.

>>> @d1(1)(2)
SyntaxError: invalid syntax

The problem I had with tuple unpacking had nothing to do with
decorators.  I was referring to a function within the class, and I
needed to be consistent with my use of tuples as arguments to
functions and the use of the '*' indicator.

>Do you understand what I mean when I say a decorator should take one 
>function as its argument and it should return a function?
>
>regards
>  Steve

Hope this clarifies things a bit.

Cheers,
Ron




From gsakkis at rutgers.edu  Fri Apr  8 19:42:52 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 8 Apr 2005 16:42:52 -0700
Subject: Puzzling OO design problem
Message-ID: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>

I'm looking for a design to a problem I came across, which goes like
this (no, it's not homework):

1. There is a (single inheritance) hierarchy of domain classes, say
A<-B<-..<-Z (arrows point to the parent in the inheritance tree).
2. This hierarchy evolved over time to different versions for each
class. So for example, version's 1 hierarchy would be A_v1 <-B_v1
<-..<-Z_v1.
3. At runtime, only one version is selected by a factory function.

Up to this point, the inheritance graph would be the following:

A <- A_V1 ... <- A_Vn
^     ^           ^
|     |           |
B <- B_V1 ... <- B_Vn
.     .           .
.     .           .
.     .           .
^     ^           ^
|     |           |
Z <- Z_V1 ... <- Z_Vn


This could be implemented either with multiple inheritance (e.g.
B_V1(B,A_V1)) or using the bridge design pattern |Z| times, one per
each row. Both solutions would be acceptable; there are no ambiguities
caused by the multiple inheritance (or they are resolved properly
whenever they occur).

Now the problem is that there are 'holes' in this inheritance lattice:
Not all versions introduced new variations of all types; for instance
B_V5 could be missing, meaning that the most recent earlier version of
B would be used in version 5 (say B_V2). My first thought was to create
all the missing classes dynamically, but it's somewhat obscure and it
may not be that simple. Is there a more elegant solution, either a
general design pattern or some clever python metaprogramming hack ?

George



From michele.simionato at gmail.com  Fri Apr  1 23:57:54 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 1 Apr 2005 20:57:54 -0800
Subject: property and virtuality
In-Reply-To: <3b272jF63adiuU1@individual.net>
References: <mailman.1128.1112268435.1799.python-list@python.org>
	<3b272jF63adiuU1@individual.net>
Message-ID: <1112417874.568579.172650@z14g2000cwz.googlegroups.com>

Diez B. Roggisch:

> On second thoughts, a metaclass _might_ help here - but it would be
rather
> elaborate: look in the baseclasses for properties that have getters
and
> setters of the same name as some methods in the current class, and
replace
> them, or  create a new property with them (I'm not sure if
descriptors
> allow changing their get/set/del methods). I'm not 100% sure if and
how
> good that works (a quick hack would be easy, but to ship around the
cliffs
> of multiple inheritance requires more careful navigation I fear...)

Maybe you are worrying to much. Here is a quick metaclass solution
which
magically generates properties from methods which name starts with
"get"
or "set":

class MagicProperties(type):
    def __init__(cls, name, bases, dic):
        prop_names = set(name[3:] for name in dic
                         if name.startswith("get")
                         or name.startswith("set"))
        for name in prop_names:
            getter = getattr(cls, "get" + name, None)
            setter = getattr(cls, "set" + name, None)
            setattr(cls, name, property(getter, setter))

class Base(object):
    __metaclass__ = MagicProperties
    def getx(self):
        return self._x
    def setx(self, value):
        self._x = value

class Child(Base):
    def getx(self):
        print "getting x"
        return super(Child, self).getx()
    def setx(self, value):
        print "setting x"
        super(Child, self).setx(value)

c = Child()
c.x = 1
print c.x

This should work well for multiple inheritance too (modulo metaclass
conflicts).

I must say, however, that I never use this idiom (i.e. polluting my
classes
with tons of getters and setters and making properties from them).
I typically use a property factory function, or a custom descriptor.


                Michele Simionato



From tjreedy at udel.edu  Sun Apr  3 01:58:59 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 3 Apr 2005 01:58:59 -0500
Subject: testing -- what to do for testing code with behaviour dependant
	upon which files exist?
References: <424F00D5.9020205@po-box.mcgill.ca>
Message-ID: <d2o44f$q1e$1@sea.gmane.org>


"Brian van den Broek" <bvande at po-box.mcgill.ca> wrote in message 
news:424F00D5.9020205 at po-box.mcgill.ca...
> Hi all,
>
> I'm just starting to employ unit testing (I'm using doctest), and I am
> uncertain how to handle writing tests where the behaviour being tested is 
> dependant on whether certain file paths point to actual files.

I would think about writing a dummy 'file' function whose return or raising 
depends on the filename passed in.  Then your test would be independent of 
the actual environment.  For something more elaborate, I would google 
Google's Python newgroup archive for 'dummy filesystem' for past threads on 
the topic.

TJR





From jepler at unpythonic.net  Sun Apr 10 10:18:36 2005
From: jepler at unpythonic.net (jepler at unpythonic.net)
Date: Sun, 10 Apr 2005 09:18:36 -0500
Subject: Does Tk provide ComboBox ?
In-Reply-To: <pan.2005.04.10.07.59.15.983406@optushome.com.au>
References: <pan.2005.04.10.07.59.15.983406@optushome.com.au>
Message-ID: <20050410141836.GB1330@unpythonic.net>

Another Tk combobox is part of "bwidget".  A Python wrapper can be found at 
	http://tkinter.unpythonic.net/bwidget/
	http://unpythonic.net/cgi-bin/viewcvs.cgi/bwidget/
I think the appearance of the combobox is fairly close to the win9x look,
especially when used with my "options.py" package
	http://unpythonic.net/cgi-bin/viewcvs.cgi/axis/rs274/options.py?rev=1.2&content-type=text/vnd.viewcvs-markup

Jeff
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From mwm at mired.org  Tue Apr 26 22:53:10 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 21:53:10 -0500
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org> <86is29n9cg.fsf@guru.mired.org>
	<d4l825$mj7$1@domitilla.aioe.org>
	<mailman.2525.1114534435.1799.python-list@python.org>
	<d4md4t$gfm$1@domitilla.aioe.org>
	<mailman.2548.1114556884.1799.python-list@python.org>
	<d4mrdf$jrc$1@domitilla.aioe.org>
Message-ID: <86ekcxkk15.fsf@guru.mired.org>

Maurice LING <mauriceling at acm.org> writes:

> The idea of having to release the program or library as source files
> does ring alarms in many executives in corporate world. Less freezing
> the modules (which renders it platform dependent) or using Jython
> (which is not possible when C extensions are involved), there is no
> middle grounds in CPython for distribution without source codes.

You're right - and byte codes *as they exist now* aren't an acceptable
middle ground, either. The problem isn't that the interpreter might
change (that can be defeated by distributing the interpreter with the
bytecode files), but that the byte code can be decompiled to get your
Python source back. See <URL:
http://www.crazy-compilers.com/decompyle/ > for an example.

Selling byte codes to someone who's worried about shipping source is
selling them snake oil. I think it's unprofessional, at best.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From mahs at telcopartners.com  Wed Apr 20 16:00:57 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 20 Apr 2005 13:00:57 -0700
Subject: Enumerating formatting strings
In-Reply-To: <42662dc9.49780670@news.oz.net>
References: <mailman.2061.1113855968.1799.python-list@python.org>	<3cm9r2F6nif67U1@individual.net>	<d44vgg$jmr$04$1@news.t-online.com>
	<42660fc2.42093557@news.oz.net>	<d455oo$7et$02$1@news.t-online.com>
	<42662dc9.49780670@news.oz.net>
Message-ID: <d46c5b$a6l$1@sea.gmane.org>

Bengt Richter wrote:
> On Wed, 20 Apr 2005 11:01:28 +0200, Peter Otten <__peter__ at web.de> wrote:
> 
...
>>>>>"%s %(x)s %(y)s" % D()

My experiments suggest that you can have a maximum of one unnamed argument in a 
mapping template - this unnamed value evaluates to the map itself
>> ...
>> So under what circumstances is 
>>'%s this %(x)s not %% but %s' a valid format string?

Based on the above experiments, never.

I have wrapped up my current understanding in the following class:

  >>> s = StringFormatInfo('%s %*.*d %*s')
  >>> s
  POSITIONAL Template: %s %*.*d %*s
  Arguments: ('s', 'width', 'precision', 'd', 'width', 's')

  >>> s = StringFormatInfo('%(arg1)s %% %(arg2).*f %()s %s')
  >>> s
  MAPPING Template: %(arg1)s %% %(arg2).*f %()s %s
  Arguments: {'': 's', 'arg1': 's', 'arg2': 'f', None: 's'}
  >>>

class StringFormatInfo(object):
     parse_format = re.compile(r'''
         \%                                  # placeholder
         (?:\((?P<name>[\w]*)\))?            # 0 or 1 named groups
         (?P<conversion>[\#0\-\+]?)          # 0 or 1 conversion flags
         (?P<width>[\d]* | \*)               # optional minimum conversion width
         (?:.(?P<precision>[\d]+ | \*))?     # optional precision
         (?P<lengthmodifier>[hlL]?)          # optional length modifier
         (?P<type>[diouxXeEfFgGcrs]{1})      # conversion type - note %% omitted
         ''',
         re.VERBOSE
         )

     """Wraps a template string and provides information about the number and
        kinds of arguments that must be supplied.  Call with % to apply the
        template to data"""

     def __init__(self, template):
         self.template = template
         self.formats = formats = [m.groupdict() for m in 
self.parse_format.finditer(template)]

         for format in formats:
             if format['name']:
                 self.format_type = "MAPPING"
                 self.format_names = dict((format['name'], format['type'])
                             for format in formats)
                 break
         else:
             self.format_type = "POSITIONAL"
             format_names = []
             for format in formats:
                 if format['width'] == '*':
                     format_names.append('width')
                 if format['precision'] == '*':
                     format_names.append('precision')
                 format_names.append(format['type'])
             self.format_names = tuple(format_names)

     def __mod__(self, values):
         return self.template % values

     def __repr__(self):
         return "%s Template: %s\nArguments: %s" % \
                 (self.format_type, self.template, self.format_names)



Michael



From mlh at selje.idi.ntnu.no  Tue Apr 12 07:17:29 2005
From: mlh at selje.idi.ntnu.no (Magnus Lie Hetland)
Date: Tue, 12 Apr 2005 11:17:29 +0000 (UTC)
Subject: ./pyconfig.h?
Message-ID: <slrnd5nbi9.ckm.mlh@selje.idi.ntnu.no>

It seems that in my Solaris installation,
sysconfig.get_config_h_filename() returns './pyconfig.h', which is, of
course, in most cases just wrong... :)

Shouldn't this return an absolute path (in all cases)? I've use an
absolute path in the --prefix of ./configure -- but I guess I was
standing in that very directory when compiling; maybe there's some
mix-up there?

-- 
Magnus Lie Hetland                    Fall seven times, stand up eight
http://hetland.org                                  [Japanese proverb]


From kasimov at i.com.ua  Mon Apr 25 08:23:19 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Mon, 25 Apr 2005 15:23:19 +0300
Subject: help needed :-pgdb givig error
References: <mailman.2432.1114414129.1799.python-list@python.org>
Message-ID: <d4inla$1p50$1@news.tsystems.kiev.ua>


Please try to check out permisions on the library.
Perhaps there is no permissions for reading the library with uid of
web-server

"Ram" <rknair77 at gmail.com> ???????/???????? ? ???????? ?????????:
news:mailman.2432.1114414129.1799.python-list at python.org...
Dear All
 I am very new to python . i would appreciate any help from you all on
this problem which i am facing.

I am trying to connect to postgres from python.for this i am using
something like " import pgdb". i am able to connect to postgres and
fetch data , if i execute the python file directly in unix prompt.
However when i try to do thsi through broeser iam getting the
following error..
Traceback (most recent call last):
  File "/opt/tools/cvs/htdocs/viewcvs/cgi/test.cgi", line 5, in ?
    import sys,string,os,pgdb
  File "/usr/local/lib/python2.3/site-packages/pgdb.py", line 62, in ?
    from _pg import *
ImportError: ld.so.1: /usr/local/bin/python: fatal: libpq.so.3: open
failed: No
such file or directory
premature end of script headers...

I have python2.3 and 2.4 installed , of which pgdb.py and pg.py is
installed in
/usr/local/lib/python2.3/site-packages . Please help me out how to solve
this
 when i give $python it is going to python 2.3.3. I also have the
shared library _pg.so in the same directory.

Luv
Ram




From davecook at nowhere.net  Thu Apr 28 01:20:03 2005
From: davecook at nowhere.net (Dave Cook)
Date: Thu, 28 Apr 2005 05:20:03 GMT
Subject: python equivalent of php implode
References: <d4ln6a$2nse$1@news.tsystems.kiev.ua>
	<kvo3k2-s9c.ln1@pluto.i.infosense.no>
	<vafu61l3fuslsqa3vio2jc65octj0b2728@4ax.com>
Message-ID: <slrnd70sk3.d52.davecook@localhost.localdomain>

On 2005-04-27, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> On Wed, 27 Apr 2005 08:44:36 +0200, Ola Natvig <ola.natvig at infosense.no>
> declaimed the following in comp.lang.python:

>> sql = "INSERT INTO %s (%s) VALUES (%s)" % (table, ','.params.keys()), 
>> ','.join(param.values()))

> 	That also violates the DB-API recommendations that the
> .execute() method should be used to do parameter substitution -- to
> ensure proper quoting of odd data...

I would think this would be OK:

keys = params.keys()
columnList = ", ".join(keys)
valueList = ["%%(%s)s" % key for keys]
sql = "INSERT INTO %s (%s) VALUES (%s)" % (table, columnList, valueList)
cursor.execute(sql, params)

Though you would probably want to go further and filter out keys that don't
belong in the table, something like:

keys = [key for key in tableColumns if key in params]

Dave Cook


From http  Thu Apr 21 16:29:10 2005
From: http (Paul Rubin)
Date: 21 Apr 2005 13:29:10 -0700
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>
	<mailman.2211.1114078086.1799.python-list@python.org>
	<slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>
	<1114109221.149346.64850@z14g2000cwz.googlegroups.com>
Message-ID: <7xekd3dgbt.fsf@ruckus.brouhaha.com>

"Dan Bishop" <danb_83 at yahoo.com> writes:
> Name a problem space that inherently requires arrays to be 1-based
> rather than 0-based.

"inherently" is too strong a word, since after all, we could do all
our computing with Turing machines.

Some algorithms are specified in terms of 1-based arrays.  And most
Fortran programs are written in terms of 1-based arrays.  So if you
want to implement a 1-based specification in Python, or write Python
code that interoperates with Fortran code, you either need 1-based
arrays in Python or else you need messy conversions all over your
Python code.

The book "Numerical Recipes in C" contains a lot of numerical
subroutines written in C, loosely based on Fortran counterparts from
the original Numerical Recipes book.  The C routines are full of messy
conversions from 0-based to 1-based.  Ugh.

Again, this (along with nested scopes and various other things) was
all figured out by the Algol-60 designers almost 50 years ago.  In
Algol-60 you could just say "integer x(3..20)" and get a 3-based array
(I may have the syntax slightly wrong by now).  It was useful and took
care of this problem.


From flupke at nonexistingdomain.com  Fri Apr 29 03:45:05 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Fri, 29 Apr 2005 07:45:05 GMT
Subject: __del__ and logging
Message-ID: <5Clce.76603$Io7.4986997@phobos.telenet-ops.be>

Hi,

i have a class and a class attribute log which is a logger object. In 
the __del__() function i want to log a message but it fails even if i 
use self.__class__.log.

The error i get is this:
Traceback (most recent call last):
   File "C:\Python24\lib\logging\__init__.py", line 712, in emit
     self.stream.write(fs % msg)
ValueError: I/O operation on closed file

So is there no way to use the logger object in a __del__
I wanted to use the message to clearly indicate in the logger file that 
the instance had closed ok.

Regards,
Benedict


From tzot at sil-tec.gr  Tue Apr 26 10:20:15 2005
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Tue, 26 Apr 2005 17:20:15 +0300
Subject: Python licence again
In-Reply-To: <9ofs619huvehrf3nsv5l87cl94grpcaqmn@4ax.com>
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<7loi61dq62m6gjutqoj52lgkaf2j4qm0g0@4ax.com>
	<ites61l45vkch9kqtdfvj4ps3i5cuhp8du@4ax.com>
	<9ofs619huvehrf3nsv5l87cl94grpcaqmn@4ax.com>
Message-ID: <5jis619kjlur5a0d6nec090jv9l4rkb0lm@4ax.com>

On Tue, 26 Apr 2005 23:26:41 +1000, you wrote:

[snip]

>>>Yup, pesky furriners, can't spell 'Merican prop'ly like God intended;
>>>they shouldn't be allowed on the net, sheriff should run 'em right out
>>>o' the county ...
>>
>>Sheriff is not available, for further info pls ask for R. Marley.

>I don't understand the connection with Bob Marley; pls enlighten me.

He shot the sheriff.

>>>> and heading
>>>
>>>Would that be like heading a soccer ball?
>>
>>Or heeding the sucker call (like I just did?)

>What makes you think you were heeding a sucker call?

Perhaps it's just bad wordplay from me.  I assumed you knew that
'heading' was a misspelt 'heeding' but you playingly used literally
"heading" in your reply.  For those who didn't get understand that,
though, I offered the correct "heeding" and then rhyming with "soccer
ball", I presented myself as the sucker who offered the correct spelling
when _it was not needed_.

So I didn't think I was heeding a sucker call at any moment, I just
wrote that as a pun.  There were no indirect accusations about your
post, if that is what you meant.

>>>>the google
>>>>suggestions that probably looked like "didn't you mean : Python License"
>>
>>>You might find, were you to try it, that it makes no such suggestions.
>>
>>Google isn't what it used to be when I was 6 yrs old.
>
>That would make you, what, say 10 years old now?

When I was 6 yrs old, Google was inexistant.  It isn't anymore, so my
assertion is correct (even though it's useless :)  I'm 33 btw.
-- 
Christos Georgiou, Customer Support Engineer
Silicon Solutions, Medicon Ltd.
Melitonos 5, Gerakas 153 44 Greece
Tel +30 21 06606195 Fax +30 21 06612666 Mob +30 693 6606195
"Dave always exaggerated." --HAL


From bokr at oz.net  Tue Apr 26 02:36:43 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 26 Apr 2005 06:36:43 GMT
Subject: What's do list comprehensions do that generator expressions
	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
Message-ID: <426ddda7.553554359@news.oz.net>

On Mon, 25 Apr 2005 16:48:46 -0400, Bill Mill <bill.mill at gmail.com> wrote:

>On 25 Apr 2005 23:33:48 +0300, Ville Vainio <ville at spammers.com> wrote:
>> >>>>> "Jeremy" =3D=3D Jeremy Bowers <jerf at jerf.org> writes:
>>=20
>>     Jeremy> On Sun, 24 Apr 2005 22:59:12 -0700, Robert Kern wrote:
>>     >> Never. If you really need a list
>>     >>
>>     >> list(x*x for x in xrange(10))
>>     >>
>>     >> Sadly, we can't remove list comprehensions until 3.0.
>>=20
>>     Jeremy> Why "remove" them? Instead, we have these things called
>>     Jeremy> "comprehensions" (which, now that I say that, seems a
>>     Jeremy> rather odd name), and you can control whether they result
>>     Jeremy> in a list or a generator with () or [].
>>=20
>> Still, list comprehensions should be implemented in terms of genexps
>> to get rid of the LC variable that is visible outside the scope of the
>> LC.
>>=20
>
>+1 . I think that we should still have the form [genexp] , but without
>the dangling variable, and implemented with generator expressions. It
>seems to me that it is inconsistent if I can do list(genexp) but not
>[genexp] , since they are so similar. Once that happens, we can tell
>people who ask the OP's question that [genexp] is just another way to
>spell list(genexp), and he should use it if he wants the entire list
>constructed in memory.
ISTM you have to account for

 >>> def foo(g): return g
 ...
 >>> foo(123)
 123
 >>> foo(c for c in 'abc')
 <generator object at 0x02EF154C>
 >>> [(c for c in 'abc')]
 [<generator object at 0x02EF158C>]
 >>> [c for c in 'abc']
 ['a', 'b', 'c']

>
>>     Jeremy> should be relatively simple), it's not worth breaking that
>>     Jeremy> code.
>>=20
>> Well, the code that relies on the dangling variable deserves to break.
>
>Agreed.
>
Probably ;-)

Regards,
Bengt Richter


From bokr at oz.net  Sat Apr 16 03:18:58 2005
From: bokr at oz.net (Bengt Richter)
Date: Sat, 16 Apr 2005 07:18:58 GMT
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <4260bba6.67011857@news.oz.net>

On Fri, 15 Apr 2005 16:45:55 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:

>Here is a pre-PEP for what I call "suite-based keyword arguments". The 
>mechanism described here is intended to act as a complement to thunks. 
>Please let me know what you think.
>
Sorry, I replied to to you via James Stroud's reply (q.v.) ;-)
BTW, I like this suite-based keword definition for calls better
than the thunk stuff ;-)

Regards,
Bengt Richter


From tjreedy at udel.edu  Sun Apr 10 23:44:54 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 10 Apr 2005 23:44:54 -0400
Subject: Counting iterations
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com><4256f4c0$0$2603$da0feed9@news.zen.co.uk><1112998861.316958.152060@g14g2000cwa.googlegroups.com><1113064744.144787.315120@o13g2000cwo.googlegroups.com><pan.2005.04.09.18.17.29.903696@dalkescientific.com>
	<1113114411.612323.187860@g14g2000cwa.googlegroups.com>
Message-ID: <d3crm9$rf$1@sea.gmane.org>


"runes" <rune.strand at gmail.com> wrote in message 
news:1113114411.612323.187860 at g14g2000cwa.googlegroups.com...
>
> [Andrew Dalke]
>> I therefore disagree with the idea that simple
>> string concatenation is always to be eschewed
>> over string interpolation.

String cat (+) is fine for joining a few short strings.

> Andrew, what you write makes sense. I've never really tested it, just
> read it several places, fx here:
> http://www.python.org/moin/PythonSpeed/PerformanceTips#stringcat

This is about making long strings in situations where performance is an 
issue.

Terry J. Reedy





From mehmetmutigozel at gmail.com  Fri Apr 22 20:17:36 2005
From: mehmetmutigozel at gmail.com (mehmetmutigozel at gmail.com)
Date: 22 Apr 2005 17:17:36 -0700
Subject: a=[ lambda t: t**n for n in range(4) ]
In-Reply-To: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
References: <1114206105.666055.33720@g14g2000cwa.googlegroups.com>
Message-ID: <1114215456.258241.194840@l41g2000cwc.googlegroups.com>


Thanx.

It just popped in my mind.

in 3d programming there are transformation matrices like
a=[[cos(x),sin(x),0],[-sin(x),cos(x),0],[0,0,1]]
it is a 3x3 matrix. never changes during program.

it can be defined like
>>> def transmat(x):
...           dummy=[[0,0,0],[0,0,0],[0,0,0]]
...           dummy[0][0]=cos(x)
...           ~~~~~~
...           return dummy

a=transmat(1.0)

it is usual way for this.

i wonder if there is an automatic way to make that without calling a
function.

an automatic way that depends on changing the value of x. as each time
x=something used the whole matrix changes automaticly.

or maybe i am just dreaming. :)



From grante at visi.com  Sat Apr 23 10:17:54 2005
From: grante at visi.com (Grant Edwards)
Date: Sat, 23 Apr 2005 14:17:54 -0000
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<116inf1aivjgd28@corp.supernews.com>
	<1114205820.773917.70820@f14g2000cwb.googlegroups.com>
	<116is1or7an6735@corp.supernews.com>
	<d4dje8$ebt$02$3@news.t-online.com>
Message-ID: <116km8isuo9736c@corp.supernews.com>

On 2005-04-23, Diez B. Roggisch <deetsNOSPAM at web.de> wrote:

>> You're use of the word "driver" is one with which I'm not
>> familiar.  But I don't really "do windows" so it's probably a
>> Widnowism.
>
> It could be that he means that creating PDFs on windows is
> done using a fake printer that will produce the pdf when being
> printed to - and that fake printer is implemented as a driver.
>
> And traditionally in printing one often speaks of printer
> drivers - even if they are mere filters that can't be
> considered drivers in the kernel driver way.

I think it's the latter.  I believe he wants to know how to
print a PDF file without using any external programs (or
"drivers") like Acrobat Reader or ghostscript that understand
PDF.  AFAIK, the only way to do what he wants would be for him
to write a PDF engine in Python that renders PDF into whatever
raw format is understood by his printer.

-- 
Grant Edwards                   grante             Yow!  I'LL get it!! It's
                                  at               probably a FEW of my
                               visi.com            ITALIAN GIRL-FRIENDS!!


From jjl at pobox.com  Fri Apr  1 14:56:28 2005
From: jjl at pobox.com (John J. Lee)
Date: 01 Apr 2005 19:56:28 +0000
Subject: Little Q: how to print a variable's name, not its value?
References: <1112076404.328077.247630@f14g2000cwb.googlegroups.com>
	<1112079694.786110.73040@o13g2000cwo.googlegroups.com>
	<5voi419517lc3a5pmbevs8j5hjbjmtplff@4ax.com>
	<mailman.1017.1112113429.1799.python-list@python.org>
	<ao7j411od71ilqqsjnudlcmrdutl5rmf0s@4ax.com>
	<mailman.1033.1112126329.1799.python-list@python.org>
	<05dj41p9od4qv8jto77m6t695lapet1080@4ax.com>
	<Xns9629624CA1C97duncanrcpcouk@127.0.0.1>
	<1112248566.277611.96040@g14g2000cwa.googlegroups.com>
Message-ID: <87wtrmclub.fsf@pobox.com>

"stewart.midwinter at gmail.com" <stewart.midwinter at gmail.com> writes:
[...]
> Restating:  I'm doing some debugging of some code.  I want to print out
> the value of two variables whose names are known.  Let's call them
> myTime and myPlace.
[...]

Why not simply get your editor to insert the variable name twice?  I
have that bound to C-c d in my .emacs.


John


From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 11:50:04 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 16:50:04 +0100
Subject: terminate exectutioin in PythonWin
In-Reply-To: <mailman.1843.1113405941.1799.python-list@python.org>
References: <d3j265$ne6$1@scotsman.ed.ac.uk>	<4u6dnQT8_ecAk8DfRVn-pA@comcast.com>	<d3j3em$nhh$1@scotsman.ed.ac.uk>
	<mailman.1843.1113405941.1799.python-list@python.org>
Message-ID: <d3jf20$onk$2@scotsman.ed.ac.uk>

Steve Holden wrote:
> Jim wrote:
> [...]
> 
>>
>> Actually I meant how do I stop a program running that I have started 
>> in the interpreter. If I get into an infinite loop I can't stop it 
>> without qutting PythonWin.
>>
>> Then I have to open all the files and re-insert breakpoints etc.  :(
>>
>> Jim
> 
> 
> Look in the system tray! Right-mouse on the Python and select "break 
> into running program".
> 
> regards
>  Steve
> 
> 
D'oh. I didn't think of that.

Thanks

Jim


From peter at engcorp.com  Mon Apr 18 10:17:54 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 18 Apr 2005 10:17:54 -0400
Subject: Strings and Lists
In-Reply-To: <d769864e.0504180342.426357d3@posting.google.com>
References: <d769864e.0504180342.426357d3@posting.google.com>
Message-ID: <s8SdnWWp4coIXP7fRVn-oQ@powergate.ca>

Tom Longridge wrote:
> My current Python project involves lots repeatating code blocks,
> mainly centred around a binary string of data. It's a genetic
> algorithm in which there are lots of strings (the chromosomes) which
> get mixed, mutated and compared a lot.
> 
> Given Python's great list processing abilities and the relative
> inefficiencies some string operations, I was considering using a list
> of True and False values rather than a binary string.
> 
> I somehow doubt there would be a clear-cut answer to this, but from
> this description, does anyone have any reason to think that one way
> would be much more efficient than the other? (I realise the best way
> would be to do both and `timeit` to see which is faster, but it's a
> sizeable program and if anybody considers it a no-brainer I'd much
> rather know now!)
> 
> Any advice would be gladly recieved.

It depends more on the operations you are performing, and
more importantly *which of those you have measured and
found to be slow*, than on anything else.

If, for example, you've got a particular complex set of
slicing, dicing, and mutating operations going on, then
that might say use one type of data structure.

If, on the other hand, the evaluation of the fitness
function is what is taking most of the time, then you
should focus on what that algorithm does and needs
and, after profiling (to get real data rather than
shots-in-the-dark), you can pick an appropriate data
structure for optimizing those operations.

Strings seem to be what people pick, by default, without
much thought, but I doubt they're the right thing
for the majority of GA work...

-Peter


From fredrik at pythonware.com  Sun Apr 10 06:58:10 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 10 Apr 2005 12:58:10 +0200
Subject: Thoughts on some stdlib modules
References: <mailman.1524.1112951803.1799.python-list@python.org><4257BE8B.9080209@v.loewis.de><1113120099.217977.192190@g14g2000cwa.googlegroups.com><4258e5e6$0$3407$9b622d9e@news.freenet.de>
	<1113126605.315861.44730@z14g2000cwz.googlegroups.com>
Message-ID: <d3b0mm$tc7$1@sea.gmane.org>

Kay Schluehr wrote:

> You have already given the arguments in Your discussion above. I
> personally never use the standard-lib XML parser, but pyRXP/pyRXPU
> which is fast, stores objects in pythonic list/tuple/dict structures
> and provides access by lazy tagging

it's also GPL:ed, and the namespace support is totally broken.  there
are faster solutions out there with Python-compatible licenses.

</F>





From jerf at jerf.org  Sun Apr 10 13:09:15 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sun, 10 Apr 2005 13:09:15 -0400
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<d3955k$kne$00$1@news.t-online.com>
	<pan.2005.04.09.21.20.39.130792@jerf.org>
	<d3b4b6$31o$00$1@news.t-online.com>
Message-ID: <pan.2005.04.10.17.09.15.112872@jerf.org>

On Sun, 10 Apr 2005 13:57:26 +0200, Diez B. Roggisch wrote:

>> Domain-specific abstractions do that *faster* than GUI designers, not
>> slower. And better, too, since every iteration tends to be fully
>> functional and not just a "let's see what this looks like" prototype.
> 
> Can you show me some working, in-use example for that?  I _seriously_ doubt
> that the process of rearranging and tuning the layout can be done faster in
> the text-world than with a good designer like qt-designer. But I'm all ears
> for better solutions.

Regrettably, no. I have them but they are all unsharable, either because
the real owner would consider them proprietary, or because they are an
unreleased and at the moment unfinished product I can't give the code out
for.

But I can help some.

Part of the problem is the incredible cognitive disconnect between the
"layout" system of design and the system I'm advocating. You're looking at
your designer and saying something like, "well, if I want to re-order
these two options, it's three drags, even less if there's an 'exchange'
option, how can anything possibly be any easier?" (At least, that's my
guess.) But that is not where the advantage lies.

One of the things I can't show you at the moment is actually written as a
web application using Javascript and mod_perl. It's a bog-standard GUI app
that edits databases, from the surface. SOP for the forms designer
approach is to create a form for each thing that will be edited; in this
case in HTML, but that's not particularly different and you can get form
editors for that, too, if you try.

But even now, we have at least 20 different types of things to edit, and
the full power of databases is at play here; we have foreign keys that may
have an arbitrary number of certain things (customers may have an
arbitrary number of phone numbers, for instance; in practice of course you
won't have 20, but they may have "home", the may have "home + work", the
may have "work + fax", etc.), and a customer's address may actually be in
an Address table, rather than directly in their record. Add up all the
little pieces and at the moment we've got around 100 different types of
things that might need editing, many of which can have arbitrary links to
other things. (Some of these 100 things are just "link tables", SQL tables
that link an ID in one table to an ID in another for many-to-many
relationships and these will not directly be edited, but still there's a
lot of "things" in play here.)

We could try to create a form for each one, and in fact earlier versions
of the system did just that. But that solution sucked, for all of the
reasons I typically rant against these solutions; they rapidly got out of
sync with the database schema, a bug fix in one was a bug fix in no others
(copy and paste code tends to run rampant in this situation, though
technically that's just a tendency, not a requirement), and any but the
most critical enhancements are out of the question because they only
affect a small part of the system.

So, instead, with this new system (note I wasn't involved with the old
system), I do everything with metadata. (Credit where credit is due, the
other programmer was starting to do some of this, though he couldn't quite
take it down to the interface and there are some things I had to add
later.) Every "thing" (class) has a description of what it's made out of,
and what type each of those things are. When I go to edit an instance, the
Javascript pulls down that description, and a description of the instance
(and all of its associated sub-instances), and instead *generates* a form
to edit the object based on what it is made of.

Right now, I'm emulating the old two col approach, labels on the left,
values on the right, but I'll be changing that later. For now, though,
that makes it easy (and like I said, as nice as forms are, having to do
that many they bailed out and went with a standard design). And since I'm
putting these things in by hand, I can also create custom widget types and
use them. (For that, I'm using my XBLinJS library, so you can actually
think of the HTML widgets as having capabilities much like Tkinter
widgets, in that I can subclass from them and make them do domain-specific
things just like Tk.)

Integer value types get integer text boxes; these do not allow you to type
anything but numbers. Floating point is the same way, but adds the .
(although only one). All numeric fields do math within themselves, which
is something that should have been standard for a decade now but
programmers had to actually do something special in their forms to get
it; I get it for the same price as anything else, once I wrote the
code. (By that I mean, type "1+4" in and it will resolve itself to
"5".) That's one of the reasons I rant about this; there is *so much*
functionality like that that ought to be standard because done correctly
it's trivial to plunk the right text widget subclass down if you're
generating the screen, but form designers make this a lot of extra work.

How do I decide the order to create the fields? Classes carry a metadata
field called "order" that lists the fields it wants in order, the
remainder will by default be tacked on the end. What if I don't want a
certain field to display? There's a metadata field that lists the ones we
want to display for editing, there's another I can use to just filter a
couple out if the first isn't present. What if I want a particular widget
to do something special like be a certain width? I've created a metadata
"escape hatch" that lets me pass parameters directly to the <input> node;
it's "bad style", but sometimes useful. Everything I use is backed by a
database which has limited typing abilities, so I have a field called
"humantype" that declares the human type of the data, so I can then create
intelligent widgets for that, too. One of the things we can do, for
instance, is create an "image" widget that specifies a URL for an image,
and as validation, shows it there in the browser. We could also make it
accept uploads. Then, just by labelling a field as an "htmlImage", we get
the image editor, no form redesign, no muss, no fuss.

Form designers give you small parts of this; you can create a text node,
say it's an int, and get automatic min/max, although... they don't pull it
from the database, they don't have any understanding of what's going on,
etc. In my design, every is some sort of intelligent field, not a
bog-standard text box, and the idea of a "field" includes the ability to
validate the value inside of it, depending on what kind it is. (Here, the
number fields for instance have a bit of code to check min and max. Other
fields make sure they reference something real in the database.)

By making smarter widgets, and intelligently assembling them in code
instead of plopping down stupid (in the programming sense, not the
derogatory sense) text widgets here and checkbox widgets there, I can
(and have) created entirely *new* objects, and the editor *just works*.

Semi-weakness: Vast, labyrinthine preferences dialogs can be a pain, if
your "core app" doesn't itself look like one. Still, you'd be surprised in
practice how that tends not to come up, especially if your app can already
support that sort of thing, in which case it's just another data source.
(All the prefs we have in this app fit right into the same model without
any hassle, so this isn't a stopper.)

The true and major weakness: You can't hire a guy off the street to draw
boxes in his designer, connect a couple of events, and call the form done.
(Although in practice it's rarely that easy...) You have to be a
programmer that can handle a level of abstraction above the raw fields.
But the benefits are...

...ultimately, *exactly* the same benefits you obtain from any other layer
of abstraction, and with exactly the same tradeoffs and costs, with
exactly the same result that *typically* the abstraction is a good thing
but every once in a while, mostly on small jobs, it's a loss. Indeed I see
this entire argument as isomorphic to "Why would I want to do OO when my
procedural code works just fine?", right down to the different programming
style it engenders, the difficulty of crossing the understanding gulf, and
the initial difficulties. (Regrettably, this style is unpopular and not
immediately supported by frameworks or anything, so initially you end up
constructing your own.) It even *feels* the same, with the way I don't
want to work on forms-based apps anymore because they feel so static and
concrete and immobile, just as non-OO procedural does, and the way it
takes so much work to do the same thing, over and over again.

If this thread is still going in a couple of days, I'll post a screenshot
with some labels on it so I can gesture a little more concretely, and I
might post some of the source data files, too, if it seems like it would
help. The screenshot won't help much, though, because it is in the
*behavior* of the resulting app that the true difference is felt.

I wish I could point at a consumer app to download, but I think this has
not penetrated the general consciousness yet, because in C or C++ this is
a *god awful nightmare*. The function signatures necessary to pull this
off would put most C programmers off their feed, and would challenge even
C++ programmers (God help you if you tried to template any of this...),
and the memory management becomes quite exciting. This is going to follow
behind the dynamic languages, which actually make it possible, by a few
years, and those are only now beginning to penetrate the mainstream
consciousness. I would expect that at least among the good programmers,
this will be SOP in about five to ten years, with better framework
support, but at the moment all I can say is the benefits in the code I
can't show you yet (sorry) are overwhelming, and the obvious problems
fully overcomable, once you get into the paradigm.

Cue the smalltalk "I did this in the 80's and it's been all downhill since
then" replies... 


From beliavsky at aol.com  Thu Apr 28 10:01:50 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 28 Apr 2005 07:01:50 -0700
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com>
Message-ID: <1114696910.862093.100690@z14g2000cwz.googlegroups.com>

IMO the fact that so many people ask

"How can I create executables in Python on Windows"

indicates that standard "batteries included" Windows Python
distribution is missing a vital battery. There are tools such as
py2exe, but this functionality should be built-in, so that a newbie to
Python can just download it, type

python -o foo.exe foo.py

at the command line, and get an executable, without any further effort.



From prabapython at yahoo.co.in  Wed Apr 27 06:47:54 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Wed, 27 Apr 2005 11:47:54 +0100 (BST)
Subject: how to connect my sql with Python
Message-ID: <20050427104754.45719.qmail@web8407.mail.in.yahoo.com>

Dear All,

       I am doing Python-cgi Project in my company.
To connect My sql database(Mysql 4.1.11.) into
Python(2.3.3) cgi.  I have installed
MySQL-python-1.2.0. After installation of
MySQL-Python-1.2.0 I try import
MySQLdb module.  It raised the following error

>>import MySQLdb

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File
"/System/Links/Libraries/python2.4/site-packages/MySQLdb/__init__.py",
line 27, in ?
    import _mysql
ImportError: libmysqlclient.so.14: cannot open shared
object file: No such file or directory

so kindly give me guidance to connect Mysql and Python

regards
Praba

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From hancock at anansispaceworks.com  Thu Apr 14 01:24:42 2005
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Thu, 14 Apr 2005 00:24:42 -0500
Subject: Image Module
In-Reply-To: <Pine.BSO.4.61.0504121659140.12300@login2.srv.ualberta.ca>
References: <Pine.BSO.4.61.0504121659140.12300@login2.srv.ualberta.ca>
Message-ID: <200504140024.42827.hancock@anansispaceworks.com>

On Tuesday 12 April 2005 06:01 pm, Nicholas S. Graham wrote:
> I want to convert a field of 4:2:2 digital video data into a viewable 
> format (.jpg or something) using the Image module.  Any suggestions??

I'll assume that by "Image" module, you mean Python Imaging Library.

I doubt it supports your digital video format, and I'm not sure what
"4:2:2 digital video" actually is.   You clearly need to get your video
software to export data in a standard image format of some kind (there
are many choices).  If your current video software can't save a freeze
frame in a standard format, then you'll have to search for another
video package that can.  If you get desperate, you can capture it
off of the screen with Gimp, but I assume that's not acceptable for
your situation?

Once you get it, you can use Python Imaging Library to read it
and do what you want with it.  PIL is not particularly good about the
number of formats it support (it has a definite bias towards PNG format,
and it reads more formats than it can write).  You might want to try
ImageMagick, which has a much wider range of image data types that
it can read and write.  In a Python script, you can run ImageMagick
from an os.system() call or you can use one of the Python bindings for
it.
 
Cheers,
Terry

--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks  http://www.anansispaceworks.com



From grante at visi.com  Wed Apr 27 12:06:05 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 27 Apr 2005 16:06:05 -0000
Subject: PyGTK vs. wxPython
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<d4j8qk$tc1$1@domitilla.aioe.org>
	<1114551965.718056.197480@g14g2000cwa.googlegroups.com>
	<116tf7lm0ivnl6c@corp.supernews.com>
	<1114600746.599172.163730@o13g2000cwo.googlegroups.com>
	<116v872cjudbbd8@corp.supernews.com>
	<1114612551.280006.307190@g14g2000cwa.googlegroups.com>
Message-ID: <116ve3drs9m852a@corp.supernews.com>

On 2005-04-27, dcrespo <dcrespo at gmail.com> wrote:

> If you see carefully, that question was for you too, because the reply
> is at the same level as the one that says "Aaaaaaand: which do you
> prefer?" :)

You're assuming that everybody's newsreader displays things in
the same manner yours does.  You're wrong: they don't.  

-- 
Grant Edwards                   grante             Yow!  Maybe we could paint
                                  at               GOLDIE HAWN a rich PRUSSIAN
                               visi.com            BLUE --


From yhdanid at yahoo.com  Thu Apr 21 19:53:53 2005
From: yhdanid at yahoo.com (Obaid R.)
Date: 21 Apr 2005 16:53:53 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
Message-ID: <1114127633.859113.292290@l41g2000cwc.googlegroups.com>

SUMMARY
=======

For the past few weeks, a self-professed
internet evangelist has posted several times
to several news groups to claim several
points as facts. It would appear that these
assertions do not stand up to close
examination, logic and reason, and stand in
direct contradiction to the explicit text
attributed to Almighty God as found in the
Bible.


GOD IS NOT A MAN
================

Mr. Ron Grossi's claim that "God tells us in
the Bible" that in order to get to heaven
people need to believe "Christ is Lord" or
"Christ as Lord" or "Christ Lord" depending
on the version of the Bible you have, and
that furthermore, people also need to believe
that "God raised Him from the dead" is
typical of the issues we face with his post.

First of all, it is not Almighty God that is
telling us these things. It is non other than
(St.) Paul, whom most Christian scholars
believe never to have met Christ, peace and
blessing of Almighty God be upon him (PBBUH)
in the flesh while he lived on this earth,
that is allegedly doing the telling, writing
in the book of Romans, not Almighty God.

And who is Paul, does anyone know? The reader
is advised to read from the Bible from the
book of Acts:

"But when Paul perceived that the one part
were Sadducees, and the other Pharisees, he
cried out in the council, Men and brethren, I
am a Pharisee, the son of a Pharisee: of the
hope and resurrection of the dead I am called
in question." (Acts 23: 6)


And what did Christ PBBUH himself say
concerning those?

"Then Jesus said unto them, Take heed and
beware of the leaven of the Pharisees and of
the Sadducees." (Matthew 16: 6)


And so it appears that Mr. Grossi is
attributing the alleged words of Paul, whom
if we are to believe in the Bible, we now
know who he is and what we should do about
his leaven, to Almighty God!

Secondly, the words of Paul and the post of
Mr. Grossi imply that "Christ is Lord" is equal
to "Christ is LORD", i.e. that to get to
heaven people need to believe that Christ is
Almighty God Himself; but this contradicts
"the word of God" as found in the Bible, and
even the words attributed to Christ PBBUH
himself in the first person as found in the
New Testament. Please bear with me.

It is in the Bible that we read Christ PBBUH
repeatedly described as "a man" (Acts
2: 22) and we even read words attributed to
him in the first person testifying that he is
"the son of man" (Luke 9: 58). And it is in
the same Bible that we read it proclaimed
time after time that "God is not a man ...
neither the son of man" (Numbers 23: 19).

And so unless one wishes to dispute what the
meaning of the word "is" is, then the Numbers
verse mean what it says: Christ PBBUH was not
God, is not God, and never will be God.
Period. After all "God is not a man"
(Numbers 23: 19) from the beginning of time,
during the time Christ PBBUH walked this
earth, and until the end of time.

Now if Paul meant "Lord" as meaning
"nobleman", "person in position of
authority", or "title prefixed to named of
peers and barons" (all quoted from the A.L.
Dictionary of Current English), then
referring to Christ PBBUH as such would have
been fair.

It is so because with the English translation
of the Bible originating from an environment
where "Lords" abound, it would be a fair
practice to attribute the word "Lord" in its
earthly connotations to Christ PBBUH.
Needless to say that as a messenger and
prophet of Almighty God, Christ PBBUH does
indeed deserve that title, especially with
divine authority to back him up.

Perhaps it is worth mentioning that Abraham,
Jacob, and many other prophets, peace and
blessings of Almighty God be upon them
(PBBUT), were also referred to as lords. (See
Genesis 18: 12, and Genesis 32: 4).

Implying, however, like Mr. Grossi and others
of like mind do, that "Lord" actually means
"LORD", then we should refer them back to
(Numbers 23: 19) I guess. After all, it is
either Almighty God is telling the truth, or
they are. There is exclusivity here. God is
either a man, or He is not a man. And I don't
know about you, but I prefer to believe
Almighty God over anyone else.

Thirdly, In all the versions of the Bible I
have I cannot find one rendering which reads
like Mr. Grossi's quote.

Mr. Grossi's:
"... and believe in your heart that God
raised Him from the dead, you WILL
BE SAVED."


KJV:
"... and shalt believe in thine heart that
God hath raised him from the dead, thou shalt
be saved." (Romans 10: 9)


RSV:
"... and believe in your heart that God raised
him from the dead, you will be saved."
(Romans 10: 9)


ASV:
".. and shalt believe in thy heart that God
raised him from the dead, thou shalt be
saved:" (Romans 10: 9)


YLT:
"... and mayest believe in thy heart that God did
raise him out of the dead, thou shalt be
saved," (Romans 10: 9)


Note that in all versions of the Bible quoted
from that Mr. Grossi's "God raised Him" is
rendered (more or less) "God raised him." The
word "him," referring to Christ PBBUH, is in
lower case. This shows that this Biblical
text, even when attributed to Paul, seems
still in keeping with the spirit of Numbers
23: 19, namely that "God is not a man ...
neither the son of a man" to deserve a
capitalized LORD, so to speak. That Mr.
Grossi or people of like mind are miss-
quoting here and then implying an anti-truth
does not make this miss-quote divine truth by
their merely repeating it.

Also do note that it reads "God raised him."
In other words, the raising is attributed
here to Almighty God, while the object of the
raising is meant to be Christ PBBUH. And
the fact that "him" was used instead of
"Himself" effectively rules out (also in
keeping with the spirit of the word of God as
found in the Bible that God is not a man)
that Christ PBBUH was ever God.


GOD WILL NOT DWELL ON THE EARTH
===============================

Mr. Grossi then proceeds to claim that:

"Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full."


It does not take much to note that this is
a claim yet to be backed up with supporting
evidence. As a matter of fact and after
reading from 1 Kings (see below) one would be
quick to conclude that this claim is yet
again made in direct contradiction to the
"word of God" as found in the Bible.

"But will God indeed dwell on the earth?
behold, the heaven and heaven of heavens
cannot contain thee; how much less this house
that I have builded?" (1 Kings 8: 27)


So, it is according to the Bible of all books
that not only "God is not a man ... neither
the son of man," but also that "God will not
dwell on the earth." Why? Not that we need to
know why, but apparently because "the heaven
and heaven of heavens cannot contain God."
Note that these are not my words. These are
verbatim words quoted from the Bible.


CHRIST WAS NOT CRUCIFIED
========================

It comes as no surprise to me that when Mr.
Grossi miss-quotes from the Bible and resorts to
quoting the very people Christ PBBUH warned
against) to attribute certain words to
Almighty God that he will arrive at the exact
opposite of what he intended for.

The holy book of the Muslims is explicitly
clear on the idea of the alleged crucifixion of
Christ PBBUH, and that of the original sin.
Muslims are told that to believe that we (as
humans) are to be held accountable for our
fathers' sins is to imply that Almighty
God, may He be glorified above all of this,
is an imperfect unjust God. That for us (as
humans) to believe that Almighty God requires
the death of an innocent man (in the person
of Christ PBBUH) to die for the mistakes of
anyone also implies that Almighty God, may He
be glorified above all of this, is an
imperfect unjust God.

But since Almighty God is PERFECT in every
way: power, knowledge, mercy, justice, etc.,
then to believe in the message of Grossi here
is to attach an imperfection to Almighty
God, and is to belittle Almighty God's
supreme qualities and Majestic Being. In fact
the Qur'an argues that people who do that
(i.e., believe that God will blame us for the
mistakes of others, or that He requires the
blood of an innocent man for the forgiving of
the sins of the guilty) are not actually
worshiping the one true God. Yes Almighty
God created everyone, but you see, He has
none of these qualities that people like
Grossi here attribute to the "God" they
worship. Hence they are worshiping somebody
or something other than the true Almighty
perfect God.

It is in this light (in spite of the repeated
messages of anyone) that it becomes revealing
if the Qur'anic claim that Christ PBBUH was
not crucified is actually verified in the
Gospels.

If we quote from the Qur'an for a change, we
read Almighty God asserting the following
while speaking of those who boast that they
killed the Messiah of God:

"That they said (in boast), "We killed Christ
Jesus the son of Mary, the Messenger of
Allah";- but they killed him not, nor
crucified him, but so it was made to appear
to them, and those who differ therein are
full of doubts, with no (certain) knowledge,
but only conjecture to follow, for of a
surety they killed him not:-"
(Translation, Qur'an, 4: 157)


This is an amazingly bold statement. One that
could have come only from one who knows the
facts. So let's study this matter in the
Bible.


COMMON GROUND
=============


If we are to examine whether Christ PBBUH was
crucified or not, we need to agree on common
ground and define (or underline the meaning
of) some words. One would have to study what
"crucified" and "resurrected" mean, and then
see whether after his alleged crucifixion and
resurrection, Christ's nature PBBUH agrees with
these definitions.


WHAT DOES CRUCIFY MEAN?
-----------------------

According to the English language crucify
means "to cause death by hanging or impaling
on the cross." Note that death has to occur
on the cross for the act of crucifixion to be
considered to have taken place.

Many people in the Philippines stage mock
"crucifixions" around the time of "Good Friday"
to mark the alleged sacrifice of Christ PBBUH.
But the mere fact, however, that these people
are brought down alive from the crosses
automatically nullifies the notion that
actual crucifixions did take place.

After all, if one is brought down from the
cross and he walks around smoking cigarettes
then he was not technically speaking
crucified. Yes, he was put up on the cross,
but since that did not cause death then
(according to the universally agreed norms of
language and reason) one cannot say that the
said man was crucified and be telling the truth.

The deficiency is in the English language
which cannot differentiate between putting
some one up on the cross and having that
person die on the cross because of being put
on it. In fact it is for this reason that
some scholars (Ahmed Deedat of South Africa)
have suggested the introduction of the word
"cruci-ficion", i.e. made-believe
crucifixion, as in a work of fiction, into the
English language.


WHAT DOES RESURRECTED MEAN?
---------------------------

Having known what crucifixion means (as
opposed to cruci-ficion) let's move on to
study the word "resurrected."

Amazingly enough, it is in the Bible the one
finds Christ PBBUH himself in the first
person defining the resurrected as follows:
"... neither can they die any more for they
are equal unto the angles ..." (Luke 20: 36) whom
the Bible explains are "spirits" (Psalms 104:
4), a definition confirmed by Paul who explains
that the resurrected have a "spiritual body"
(1 Corinthians: 15: 44).

Now having known from the Bible (of all books)
that the resurrected are spirits, ghosts, or
spooks, and that to be crucified one would
have to die on the cross, let's study the
state of Christ PBBUH after his alleged
crucifixion and resurrection to see if he
fits the definitions of these words.


THEY FORSOOK HIM AND FLED
=========================


In the Bible, you will read that at the most
crucial juncture of the life of Jesus *all* his
disciples forsook him and fled. All of them.
Read from (Mark 14: 50): "And they all forsook him,
and fled."

So the Bible reports Jesus is hanged on the
cross; this is what people were talking
about. This is what the disciples had heard
from hearsay, because they had "ALL FORSOOK
HIM AND FLED." (Mark 14: 50) (Emphasis added).
Likewise, they had heard from hearsay that
Christ PBBUH had given up the ghost on the
cross. This is what people were talking
about. This is what the absent disciples
assumed then to be the sad end to their Rabbi.

Proof of that is evident in their terror when
Christ PBBUH goes to the upper room after his
alleged crucifixion and resurrection, when he
says to them: "Peace be unto you." (Luke
24: 36). [This is the official Muslim greeting
by the way].

Instead of going to kiss and hug their Rabbi,
"they were terrified and affrighted, and
supposed that they had seen a spirit." (Luke
24: 37).

Why were they terrified? They were so because
they thought they had seen a *spirit*. After
all they had heard (as opposed to witnessed)
that Christ PBBUH had given up the ghost on the
cross.

But did they? Did they see a spirit?


A SPIRIT HATH NOT FLESH AND BONES
=================================


Speaking after his alleged crucifixion
and resurrection (when he ought to have been
a spirit), Christ PBBUH is reported as saying:

"And he said unto them, Why are ye troubled?
and why do thoughts arise in your hearts?
Behold my hands and my feet, that it is I
myself: handle me, and see; for a SPIRIT hath
not FLESH and BONES, as ye SEE me HAVE."
(Luke 24:38-39) (Emphasis is mine)


Christ PBBUH is emphatic about it: Christ
PBBUH says he was no spirit. Christ PBBUH
says he is still alive. And alive does not
equal resurrected. Must we remind ourselves
that a resurrected entity in Christ's own words
is "equal unto the angels." (Luke 20:36),
i.e., spirit, spook, ghost?


PLEASE TELL THEM
================


And so here we must ask Mr. Grossi to please
tell the truth seeker, that according to your own
scriptures that the resurrected are not
spirits, when your own Bible says they are
so. Tell them that (St.) Paul didn't define
the resurrected as having "spiritual bodies,"
(1 Corinthians: 15: 44), when he did so. Tell
them that Christ did not define the
resurrected as "equal unto the angles," (Luke
20: 36), when he preached so. Tell them that
your own scriptures does not say that the
angels are spirits, (Psalms 104: 4) when it
does so. Tell them that a spirit has flesh
and bones, when Christ himself says it is not
so. Tell them that Christ was not of flesh
and bones after he allegedly died for our
sins, when he himself says he was so. Please
tell them.

Please tell them how when asked in four
different places in the Bible "how can I
inherit eternal life?" that instead of
repeating his unchanging answer: your
salvation is in the law, keep the
commandments (See Mark 10:17-19, Luke 18:18-
20, Luke 10:25-28, and Matthew 19:16-19),
that Christ PBBUH says "believe that I am God
incarnate and you shall be saved" when he
never did so. Tell them that he answers
"believe I am part of a trinity and you shall
be saved" when he never preached so. Tell
them that he proclaims "wait until I am
crucified and then accept my sacrifice after
I am resurrected and you shall be saved" when
he never once said so. Not once. Please tell
them.


WHAT IS INIQUITY?
=================


Iniquity is injustice. This act takes place
when one is entrusted to judge in a matter
and he/she takes the right of someone and
gives to another without proof and rightfull
claim and in spite of the same.

Can you guess what is the highest form of
iniquity? It is the taking of the right to
deity (which is rightfully and uniquely
Almighty God's) and giving it to those who
don't deserve it, to those who never claimed it,
and to those who even denied it.


Almighty God says, warning us:

"And the two seas are not alike: this, fresh,
sweet, good to drink, this (other) bitter,
salt. And from them both ye eat fresh meat
and derive the ornament that ye wear. And
thou seest the ship cleaving them with its
prow that ye may seek of His bounty, and that
haply ye may give thanks.

"He maketh the night to pass into the day and
He maketh the day to pass into the night. He
hath subdued the sun and moon to service.
Each runneth unto an appointed term. Such is
Allah, your Lord; His is the Sovereignty; and
those unto whom ye pray instead of Him own
not so much as the white spot on a date-
stone.

"If ye pray unto them they hear not your
prayer, and if they heard they could not
grant it you. On the Day of Resurrection they
will disown association with you. None can
inform you like Him Who is Aware.

"O mankind! Ye are the poor in your relation
to Allah. And Allah! He is the Absolute, the
Owner of Praise.

"If He will, He can be rid of you and bring
(instead of you) some new creation. That is
not a hard thing for Allah."
(Translation, Glorious Qur'an, 35: 12-17)



As foretold by Almighty God in the Qur'anic
verse 15 shown above, Christ's PBBUH
Judgement's Day words to those who work
iniquity is amazingly confirmed in the Bible:

"Many will say to me in that day, Lord, Lord,
have we not prophesied in thy name? and in
thy name have cast out devils? and in thy
name done many wonderful works?

"And then will I profess unto them, I
never knew you: depart from me, ye that work
iniquity." (Matthew 7: 22-23)



From mahs at telcopartners.com  Thu Apr 21 16:47:51 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 21 Apr 2005 13:47:51 -0700
Subject: Enumerating formatting strings
In-Reply-To: <4267735F.9050309@holdenweb.com>
References: <mailman.2061.1113855968.1799.python-list@python.org>	<3cm9r2F6nif67U1@individual.net>	<d44vgg$jmr$04$1@news.t-online.com>	<42660fc2.42093557@news.oz.net>	<d455oo$7et$02$1@news.t-online.com>	<42662dc9.49780670@news.oz.net>	<mailman.2202.1114027350.1799.python-list@python.org>	<pan.2005.04.20.22.50.45.945404@dalkescientific.com>	<d46qmq$nca$1@sea.gmane.org>
	<4267735F.9050309@holdenweb.com>
Message-ID: <42681177.2010506@telcopartners.com>

Steve Holden wrote:
> Michael Spencer wrote:
> 
>> Andrew Dalke wrote:
>>
>>> I see you assume that only \w+ can fit inside of a %()
>>> in a format string.  The actual Python code allows anything
>>> up to the balanced closed parens.
>>>
>> Gah! I guess that torpedoes the regexp approach, then.
>>
>> Thanks for looking at this
>>
>> Michael
>>
> While Andrew may have found the "fatal flaw" in your scheme, it's worth 
> pointing out that it works just fine for my original use case.
> 
> regards
>  Steve

Thanks.  Here's a version that overcomes the 'fatal' flaw.

class StringFormatInfo(object):

     def __init__(self, template):
         self.template = template
         self.parse()

     def tokenizer(self):
         lexer = TinyLexer(self.template)
         self.format_type = "POSITIONAL"
         while lexer.search("\%"):
             if lexer.match("\%"):
                 continue
             format = {}
             name = lexer.takeparens()
             if name is not None:
                 self.format_type = "MAPPING"
             format['name'] = name
             format['conversion'] = lexer.match("[\#0\-\+]")
             format['width'] = lexer.match("\d+|\*")
             format['precision'] = lexer.match("\.") and \
                 lexer.match("\d+|\*") or None
             format['lengthmodifier'] = lexer.match("[hlL]")
             ftype = lexer.match('[diouxXeEfFgGcrs]')
             if not ftype:
                 raise ValueError
             else:
                 format['type'] = ftype
             yield format

     def parse(self):
         self.formats = formats = list(self.tokenizer())
         if self.format_type == "MAPPING":
             self.format_names = dict((format['name'], format['type'])
                             for format in formats)
         else:
             format_names = []
             for format in formats:
                 if format['width'] == '*':
                     format_names.append('width')
                 if format['precision'] == '*':
                     format_names.append('precision')
                 format_names.append(format['type'])
             self.format_names = tuple(format_names)

     def __mod__(self, values):
         return self.template % values

     def __repr__(self):
         return "%s Template: %s\nArguments: %s" % \
                 (self.format_type, self.template, self.format_names)
     __str__ = __repr__

SFI = StringFormatInfo

def tests():
     print SFI('%(arg1)s %% %(arg2).*f %()s %s')
     print SFI('%s %*.*d %*s')
     print SFI('%(this(is)a.--test!)s')


import re

class TinyLexer(object):
     def __init__(self, text):
         self.text = text
         self.ptr = 0
         self.len = len(text)
         self.re_cache = {}

     def match(self, regexp, consume = True, anchor = True):
         if isinstance(regexp, basestring):
             cache = self.re_cache
             if regexp not in cache:
                 cache[regexp] = re.compile(regexp)
             regexp = cache[regexp]
         matcher = anchor and regexp.match or regexp.search
         match = matcher(self.text, self.ptr)
         if not match:
             return None
         if consume:
             self.ptr = match.end()
         return match.group()

     def search(self, regexp, consume = True):
         return self.match(regexp, consume=True, anchor=False)

     def takeparens(self):
         start = self.ptr
         if self.text[start] != '(':
             return None
         out = ''
         level = 1
         self.ptr += 1
         while self.ptr < self.len:
             nextchar = self.text[self.ptr]
             level += (nextchar == '(') - (nextchar == ')')
             self.ptr += 1
             if level == 0:
                 return out
             out += nextchar
         raise ValueError, "Unmatched parentheses"







From fredrik at pythonware.com  Thu Apr 14 16:55:29 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 14 Apr 2005 22:55:29 +0200
Subject: Supercomputer and encryption and compression @ rate of 96%
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com><1113490437.037734.158740@g14g2000cwa.googlegroups.com>
	<425EB9CA.1010708@transnorm.ch>
Message-ID: <d3ml4c$crn$1@sea.gmane.org>

Tiziano Bettio wrote:

> could someone please tell me that this thread wasn't a aprilsfoll day
> joke and it is for real...
>
> i'm pretty much able to go down to a single bit but what would be the
> reverse algorithm as stated by martin...

magic?

I suggest running my script on a couple of small text files.  when you've done that,
see if you can figure out how the decompression algorithm works.

</F> 





From caneff at gmail.com  Sun Apr 10 13:42:00 2005
From: caneff at gmail.com (ChinStrap)
Date: 10 Apr 2005 10:42:00 -0700
Subject: numarray.array can be VERY slow
In-Reply-To: <hYmdnXBeqZ1K0sTfRVn-tg@comcast.com>
References: <hYmdnXBeqZ1K0sTfRVn-tg@comcast.com>
Message-ID: <1113154920.305043.184900@g14g2000cwa.googlegroups.com>

Yes because that is a bad way to things. There is no reason to be
working with a list when it could be done directly with numarray.



From nav+posts at bandersnatch.org  Wed Apr  6 12:58:52 2005
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 06 Apr 2005 12:58:52 -0400
Subject: Question about the Python Cookbook: How much of this is new?
References: <1112567138.365571.129840@l41g2000cwc.googlegroups.com>
	<d2prom$mj7$1@news1.ucsd.edu>
Message-ID: <878y3v4zar.fsf@localhost.localdomain>

Robert Kern <rkern at ucsd.edu> writes:

> So yeah, buy it.

Seconded. My copy arrived from ORA yesterday and I'm still giddy with
delight. Even if you have the first edition, the second includes a lot
of recipes that leverage or demonstrate the new features in 2.3 and
2.4. 

Nick 

-- 
# sigmask  (lambda deprecation version) 20041028 || feed this to a python
print ''.join([chr(ord(x)-1) for x in 'Ojdl!Wbshjti!=ojdlAwbshjti/psh?'])


From steven.bethard at gmail.com  Mon Apr  4 14:30:41 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 04 Apr 2005 12:30:41 -0600
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <mailman.1305.1112633442.1799.python-list@python.org>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
	<mailman.1305.1112633442.1799.python-list@python.org>
Message-ID: <pKidnV5nSIJNGszfRVn-vg@comcast.com>

Michael Spencer wrote:
>     def __deepcopy__(self, memo={}):
>         from copy import deepcopy
>         result = self.__class__()
>         memo[id(self)] = result
>         result.__init__(deepcopy(tuple(self), memo))
>         return result

I know this is not your recipe, but is there any reason to use
     self.__class__()
instead of
     type(self)()
if you know you're inside a new-style class?

STeVe


From vze4rx4y at verizon.net  Fri Apr 22 06:16:47 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 22 Apr 2005 10:16:47 GMT
Subject: time.strftime in 2.4.1 claims data out of range when not
References: <0001HW.BE8DEB89000A10E8F02845B0@news.verizon.net>
Message-ID: <ja4ae.24814$Xm3.22734@trndny01>

[Sheila King]
> I have a web app that has been running just fine for several months under
> Python 2.2.2.
>
> We are preparing to upgrade the server to run Python 2.4.1.
>
> However, part of my web app is throwing an error on this code (that has
> previously worked without exception):
>
> >>> time.strftime("%Y-%m-%d", (Y, M, D, 0,0,0,0,0,0))
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: day of year out of range
> >>> Y
> 2005
> >>> M
> 5
> >>> D
> 15L

>From the docs for time.strptime:
    "The default values used to fill in any missing data are (1900, 1, 1, 0, 0,
0, 0, 1, -1) ".

So, you could change the offending code line to:
>>> strftime("%Y-%m-%d", (Y, M, D, 0, 0, 0, 0, 1, -1) )
'2005-05-15'

Since the rules for handling missing, inconsistent, or out-of-range tuple fields
are not defined, even that revision has some risk.  To future-proof the code,
use strptime() to generate a well-formed time tuple:

>>> strptime('%d-%d-%d' % (y,m,d), '%Y-%m-%d')
(2005, 5, 15, 0, 0, 0, 6, 135, -1)
>>> strftime("%Y-%m-%d", _)
'2005-05-15'

This somewhat circular technique sticks with the documented API but allows you
to access all of the time module's options (like accessing the locale's names
for days of the week and months of the year).


Raymond Hettinger









From bdelmee at advalvas.REMOVEME.be  Tue Apr  5 16:00:39 2005
From: bdelmee at advalvas.REMOVEME.be (=?ISO-8859-1?Q?Bernard_Delm=E9e?=)
Date: Tue, 05 Apr 2005 22:00:39 +0200
Subject: oracle interface
In-Reply-To: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
References: <pan.2005.04.05.18.44.52.434578@dalkescientific.com>
Message-ID: <4252eea3$0$1819$6c56d894@reader0.news.be.easynet.net>

We're so satisfied with cx_Oracle (HP-UX & Win32) that we
have not even bothered checking the other ones.

Highly recommended.


From richardblackwood at cloudthunder.com  Sat Apr 23 22:45:14 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sat, 23 Apr 2005 22:45:14 -0400
Subject: Variables
In-Reply-To: <d4f0op$kp$1@sea.gmane.org>
References: <426B0283.40602@cloudthunder.com> <d4f0op$kp$1@sea.gmane.org>
Message-ID: <426B083A.70104@cloudthunder.com>

Robert Kern wrote:

> Richard Blackwood wrote:
>
>> To All:
>>
>>    Folks, I need your help. I have a friend who claims that if I write:
>>
>> foo = 5
>>
>> then foo is NOT a variable, necessarily. If you guys can define for 
>> me what a variable is and what qualifications you have to back you, I 
>> can pass this along to, hopefully, convince him that foo is indeed a 
>> variable.
>
>
> None of us can do that unless you tell us what he thinks the word 
> "variable" means. The terminology is a bit fluid. I suspect that your 
> friend applying a somewhat restricted notion of "variable" that 
> coincides with the behavior of variables in some other language.
>
Indeed, this language is math. My friend says that foo is a constant and 
necessarily not a variable. If I had written foo = raw_input(), he would 
say that foo is a variable. Which is perfectly fine except that he 
insists that since programming came from math, the concept of variable 
is necessarily the identical. This can not be true. For example, I may 
define foo as being a dictionary, but I can not do this within math 
because there is no concept of dictionaries within mathematics; yet foo 
is a variable, a name bound to a value which can change.


From rune.strand at gmail.com  Sun Apr 10 02:26:51 2005
From: rune.strand at gmail.com (runes)
Date: 9 Apr 2005 23:26:51 -0700
Subject: Counting iterations
In-Reply-To: <pan.2005.04.09.18.17.29.903696@dalkescientific.com>
References: <1112994185.983954.234650@l41g2000cwc.googlegroups.com>
	<4256f4c0$0$2603$da0feed9@news.zen.co.uk>
	<1112998861.316958.152060@g14g2000cwa.googlegroups.com>
	<1113064744.144787.315120@o13g2000cwo.googlegroups.com>
	<pan.2005.04.09.18.17.29.903696@dalkescientific.com>
Message-ID: <1113114411.612323.187860@g14g2000cwa.googlegroups.com>


[Andrew Dalke]
> I therefore disagree with the idea that simple
> string concatenation is always to be eschewed
> over string interpolation.

Andrew, what you write makes sense. I've never really tested it, just
read it several places, fx here:
http://www.python.org/moin/PythonSpeed/PerformanceTips#stringcat



From steven.bethard at gmail.com  Sun Apr  3 23:49:42 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 03 Apr 2005 21:49:42 -0600
Subject: Silly question re: 'for i in sys.stdin'?
In-Reply-To: <mailman.1277.1112583592.1799.python-list@python.org>
References: <d2q7ni$h3t$1@sea.gmane.org>
	<mailman.1277.1112583592.1799.python-list@python.org>
Message-ID: <gJednSA9hrTLJM3fRVn-oA@comcast.com>

Jeff Epler wrote:
> The iterator for files is a little bit like this generator function:
>     def lines(f):
>         while 1:
>             chunk = f.readlines(sizehint)
>             for line in chunk: yield line
> Inside file.readlines, the read from the tty will block until sizehint
> bytes have been read or EOF is seen.

I'm not the OP, but thanks for putting 2 and 2 together for me anyway. 
:)  I just tested it on my Windows XP box, and discovered that
     for line in sys.stdin:
         ...
actually does read a line at a time, as long as the lines are at least 
8192 characters long. ;)

>     def lines(f):  # untested
>         """lines(f)
> If f is a terminal, then return an iterator that gives a value after
> each line is entered.  Otherwise, return the efficient iterator for
> files."""
>         if hasattr(f, "fileno") and isatty(f.fileno()):
>             return iter(f.readline, '')
>         return iter(f)

Slick.  Thanks!

STeVe


From gershwin at splintermac.com  Sat Apr 23 21:08:04 2005
From: gershwin at splintermac.com (Peter Ammon)
Date: Sat, 23 Apr 2005 18:08:04 -0700
Subject: Python or PHP?
In-Reply-To: <kEAae.2308$5I5.223369@newshog.newsread.com>
References: <mailman.2346.1114273424.1799.python-list@python.org>
	<zhzae.2305$5I5.222813@newshog.newsread.com>
	<Xns9641ADB7FB268castleamber@130.133.1.4>
	<d9Aae.2046$Cz3.269988@monger.newsread.com>
	<Xns9641B65EDB2Ccastleamber@130.133.1.4>
	<kEAae.2308$5I5.223369@newshog.newsread.com>
Message-ID: <WPKdnXeIEOXobPffRVn-iA@comcast.com>

Leif K-Brooks wrote:
> John Bokma wrote:
> 
>> my $sort = $cgi->param( "sort" );
>> my $query = "SELECT * FROM table WHERE id=? ORDER BY $sort";
> 
> 
> And the equivalent Python code:
> 
> 
> cursor.execute('SELECT * FROM table WHERE id=%%s ORDER BY %s' % sort, 
> [some_id])
> 
> You're right, of course, about being *able* to write code with SQL 
> injection vulnerabilities in Python. But it's not even close to being as 
> easy as in PHP.

I'm bewildered why you haven't mentioned magic quotes.  A one line 
change to the configuration file can render your PHP site almost 
entirely immune to SQL injection attacks.

-Peter

-- 
Pull out a splinter to reply.


From mmrsva at gmail.com  Tue Apr 26 05:43:21 2005
From: mmrsva at gmail.com (Marcio Rosa da Silva)
Date: Tue, 26 Apr 2005 11:43:21 +0200
Subject: Order of elements in a dict
In-Reply-To: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
References: <d4l10q$7h$1@rzcomm2.rz.tu-bs.de>
Message-ID: <d4l2cg$je$1@rzcomm2.rz.tu-bs.de>

Thanks for the help!

Marcio


From postmaster at castleamber.com  Sun Apr 24 17:38:58 2005
From: postmaster at castleamber.com (John Bokma)
Date: 24 Apr 2005 21:38:58 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
	<86d5skr2l3.fsf@guru.mired.org>
Message-ID: <Xns9642A952FD589castleamber@130.133.1.4>

Mike Meyer wrote:

> John Bokma <postmaster at castleamber.com> writes:
> 
>> Mike Meyer wrote:
>>> Depends on the problem. If it's one of the things for which Python
>>> has an obvious solution (sort a list; split a string on whitespace;
>>> pull select list elements based on a criteria of some kind; search a
>>> file for lines with a given word in them; etc.) you'd get back the
>>> same answer from almost all of them.
>>
>> And what makes you doubt it would be different with Perl? :-D
> 
> Perl's "There's more than one way to do it" attitude.

There's doesn't mean that you have to use or know them all. I think 
every language here and there more ways to do something. And at a 
broader scope, e.g. a simple algorithm, it doesn't matter that much 
anymore.

>> ( sort @alist, split ' ', $astring, grep criteria, @list, etc )
> 
> In the one case where perl provides you two ways to do things, you
> chose the one that doesn't solve the problem. You want map, not grep.

You think? Please read perldoc -f grep (and map).

If you guess extra ways, you make Perl more complicated than it is :-D.

> You also chose the wrong way to do things globally, by leaving off the
> optional parens on the function invocations. That makes the list a
> PITA to parse,

First of all, who cares? Not the programmer. But I doubt if you are 
correct; why is 

OP PARAMETER, LIST

a PITA to parse, and

OP( PARAMETER, LIST )

not? I would even say that the former is easier to parse, since there is 
no need for checking the ( and ) (and matching them).

Moreover, if it's perfectly normal to write:

1 + 4 * 7

why would

OP PARAMETER, LIST

be any problem?

> in that you have to know the number of arguments to
> each function in order to parse the list you provided.

It has been a while since I wrote a lexer, but uhm, you set up a rule?

LIST := ITEM
LIST := LIST,ITEM

(I made up the syntax, but I guess it's clear)

> Consider the python version:
> 
>          (alist.sort(), astring.split(), [x for x in alist if
>          criteria(x)])

( told you it was grep ;-) )
 
> This list can be parsed by a machine. Given proper bindings for all
> the variables, Python will turn it into a tuple.

What makes you think a machine can not parse Perl? I didn't get a Larry 
Wall with my version of Perl :-D 

> N.B.: split(' ', $astring) is wrong as well. In this case, Perl
> doesn't provide the right tool for the job; you have to build it from
> parts.

You either misread your own problem specifications, or you should read 
perldoc -f split (near the end, it starts with "As a special case," )

> And those trivial variations are enough that you chose the wrong
> ones. And you're (by your own admission) an experienced Perl
> programmer.

And you don't even come close :-D.

>> One could say (and should) that the regular expression thingy in Perl
>> is a language on its own :-)
> 
> It is. For what Perl was designed for, having that be part of the
> grammar of the language makes sense. For a general-purpose programming
> language, I'm not so sure.

Same could be said of floating point numbers, or complex numbers, or 
lists, dictionaries, etc. etc.

>> But you probably agree, that if speed is an issue, and the
>> programmer's skills are not the issue, that the only thing one can do
>> is code it in a different language (probably by another programmer).
> 
> I don't agree. The better alternative is to look for a faster
> algorithm.

"The programmer's skills are not the issue"

> Now, I could have recoded it in C and gotten *much* faster. But then
> I'd have to deal with all the dynamically allocated objects (millions
> of them!) by hand,

weird, I let the computer do that :-D.

[ skilled Perl programmers use similar or same idioms ]

> My experience with Perl is just the opposite. Everytime I have to
> maintain Perl code, I come across a different set of idioms - with no
> obvious downside to them. You can, of course, define "skilled
> programmers" as those who use your idiom set. This makes the set of
> skilled Perl programmers very small. That few programmers are skilled
> is a downside of TMTOWTDI, as the only time I see new idioms in Python
> are newbies doing very odd things here.

If I could have a peek at the Perl code you maintained I could tell you 
(often by just seeing 3-5 lines) the status of the programmer who wrote 
it :-)

As I wrote before, I have little experience with Python (one could say I 
only read 2 books on it, and haven't written a stand alone piece of code 
myself). But I have the feeling that the percentage of badly skilled 
Perl programmers is way higher compared to Python for two reasons:

Quite some people have been "tweaking" CGI scripts
Quite some people "know" PHP, and hence consider themselves Perl 
programmers.

> part of the grammar of the language, and are a recent addition. It's
> not clear how Python should evolve with them added to the language.

More fat: so I would say: learn to live with it. I only see advantages. 
If you want a minimal set of operations, I recommend programming ARM 
assembly, and don't go beyond ARM3 :-D.

>>> Witness the recent spate of people asking
>>> for "goto".
>> I was a witness, moreover I stated my opinion, which in short stated 
>> that there is nothing wrong with goto as a statement. Keeping a 
>> statement from a language because beginners don't understand it, and 
>> write bad code with it, is wrong. Moreover, every time I see some
>> kind of protection in a language, I see people who consider them
>> safe, and make other, equally bad (or worse) mistakes. (See my other
>> replies in this thread regarding the special "protection" PHP has).
> 
> I, on the other hand, feel that adding something to the language just
> because you can is a *really* bad idea.

As I said: the sugared versions of goto very likely solves all problems 
that need (or "need") a goto.

> you run into it in someone elses code. I never saw a good use case for
> goto in Python (as opposed to C, where it's clearly needed).

I can only speak for Perl, and indeed, I never used a real goto.

>> You either understand why something is bad at a given moment, or not.
>> If a language must make up for the understanding a programmer lacks, 
>> something is very very wrong.
> 
> There's a difference between "making up for the understanding a
> programmer lacks" and "handicapping the programmer". Missing gotos is
> like missing explicit pointer manipulation.

Neither has ever handicapped me in any way. I remember how Sun claimed 
that their language was safe from memory leaking. I could come up with a 
simple example that leaked memory like crazy in a few seconds. Moreover, 
garbage collection gives newbies the impression that everything is 
handled automatically, and hence, they forget that other resources are 
less unforgiven, and *have to be* released.

> Carefully designed
> features added to the language (or restrictions removed from it) can
> provide the same functionality as those features, without exposing
> programmers to all the potential bugs that can occur when those
> features are used.

A beginner will find a way. A nice example is garbage collection, 
beginners think they don't have to think. And then suddenly things pop 
up like: memory leaking, how are circular references handled, and oops, 
suddenly things like weak references are needed. Add, things like 
threading, and shared resources, resources that are limited in one way 
or another and I doubt programming has become easier, or less error 
prone.

Has anyone ever did serious research to the number of bugs per 10k lines 
for several programming languages?

I remember to have read that air bags makes people drive more reckless. 
I am quite convinced the same holds for programming languages. A 
language can't cover your behind, so to speak.

> Adding something that doesn't extend the language and creates
> potential bugs is a *mistake*. You run that risk every time you add
> just another way to do something.

potential bugs is often equal to something people *think* a beginner is 
going to make.

>>> Of course not. The best you can do is provide one obvious way to do
>>> things, and then hope most people find that.
>>
>> Beginners get lost anyway, experienced programmers don't need it
> 
> I disagree. If there's not one obvious way to do things, experienced
> programmers tend to choose the one they are most comfortable with, and

and if they are not hermits, they choose the ones they see the most 
often used (unless it's Perl golf).

> will have to work out what all the others mean. This has been my
> experience with Perl and Common LISP, and from what I hear is true of
> C++ as well.

If I look at which things I have to work out the most: libraries. It 
sounds a lot like you want an extremely pure language. I almost get the 
impression that you hand code almost everything yourself. It doesn't 
matter how clean you make the language, the libraries will be fat. I 
rarely have to "work out" a piece of Perl. The "there is more than one 
way to do it" is much more about the combination of basic blocks. Perl 
is like legos. What you want sounds a lot like legos that can instead of 
round thingies to connect them uses triangles, so there is only one way 
to stack them. Oh, and you want them dull grey.

> On the other hand, my experience with languages that provide one
> obvious way to do things (Python, Scheme, Eiffel) is that experienced
> programmers tend to find that way, and beginners quickly become
> frustrated when they fight the language.

I wonder how much this has to do with how you learned Perl, and how you 
learned Python.

>>>>> My Perl evolved from very shell script like (lots of
>>>>> backticks and passing around the full text of files)
>>>> I am sure you can do that with Python too.
>>> That hasn't happened in 9 years of Python.
>> That was not what I wrote: I am sure one can program that way in
>> Python too.
> 
> No, you said "one can do that with Python", leaving the word "that"
> open to interpretation. I assumed you meant "migrate from writing sh
> to writing C", which, as I said, hasn't happened.

But it doesn't mean that one can't do ;-)

> If you meant writing sh or C in Python, try it.

You talked about "lots of backticks and passing around etc." I am sure 
one do things that are similar to backticks in Python, and also do the 
passing around thing.

> You'll find it clumsy and frustrating.

Yes, most languages make it clumsy and frustrating. Perl is a rare 
exception.

> Python wasn't *designed* to make it comfortable to
> write that way. Perl was - just a couple of more ways to do things.

But not clumsy, nor frustrating ;-) Perl is like a nice toolbox, and you 
want Python to be just one of this tools. Moreover, written on it: 
guarantee is void if used in any other way then stated in the manual.

>> if I left out the Perl 4 syntax). Moreover, I think that my current
>> Perl code is quite different from 3-4 years back. And no, not all is
>> related to the "there are more ways to do things". I changed my mind
>> on certain things (mostly style issues), learned new modules (some
>> are really new, others I just didn't know about), but also: I learned
>> new programming techniques, or other ways to look at a problem, and
>> hence, write a different solution (but using the same idioms as 3-4
>> years back). 
> 
> The only one of those that really matters is "changing your mind on
> certain things".

To you.

> The only way to do that is if there's more than one
> way to do those things in the first place.

yup, the number of whitespace for example. Even python lets you free in 
the number of spaces here and there ;-)

> My Perl style changed
> radically over the years. My python style has as well, but only
> because the language has changed as time passed. In the cases where a
> new construct/module hasn't been added, the idiom that was obvious
> with Python 1.4 is still the right choice with Python 2.4. With Perl,
> there's no obvious right choice,

To a newbie, nothing is obvious right, and a skilled programmer is able 
to find the obvious right choice. You make it sound like the perl 
community leaves people in the dark, and they have to find out what 
everything means and does by trial and error. As I already wrote: the 
more than one way is more often the *combination* of well known building 
blocks.

>>> Trying to write sh or C in Python is painfull, and you usually run
>>> into problems/drawbacks fairly quickly - because that's not the
>>> obvious way to do things.
>>
>> But again, it doesn't keep people who want to do this.
> 
> Um - this sentence isn't complete. It doesn't keep those people from
> *what*?

Trying to

> A langauge can make it easy to write ugly code, or it can make it hard
> to write ugly code.

But who writes this code? The language, or the programmer? A programmer 
who writes ugly Perl code is suddenly going to be a skilled Python 
programmer? Are you serious?

> After all, "You can write FORTRAN in any
> language(*)". If I have to maintain the code, I'd *much* prefer that
> the language make it hard to write ugly code, as I'm that much less
> likely to get ugly code to maintain.

Nonsense.

> TMTOWTDI makes it easy to write
> ugly code. TOOWTDI makes it hard to write ugly code.

And the funny thing is: it shouldn't matter to a skilled programmer. And 
an unskilled programmer will make up for the TOOWTDI restriction in more 
ways than you and I can imagine.

>> Also, Perl borrows a lot of its syntax from C, which Python (as far
>> as I have seen) does extremely little, if at all. So it's already
>> easier to program C-like in Perl, by design, even if Perl was as
>> "restrictive" as Python.
> 
> If Perl only borrowed a lot of it's syntax from C,

You can not borrow only a lot. Where is the rest coming from?

> this wouldn't be a
> problem. But it borrows a lot of it's syntax from sh as well,

Yeah, it has to come from somewhere. So either borrow it from some well 
know "language", or make up a new syntax.  It doesn't matter either way.

> sometimes supporting both (because TMTOWTDI). If it had done one or
> the other, it would have been a better language.

In your opinion, which sounds quite restrictive.

[ new things ]
> I will agree that adding new idioms from other programming paradigms
> is a good thing (see <URL:
> http://en.wikipedia.org/wiki/Programming_paradigm >). In theory, the
> reason for that is that changing paradigms changes the set of things
> you do, so you aren't adding more ways to do things, you're adding
> more things to do.
> 
> The reality is that such changes often do introduce new ways to do
> things that already exist.

Which is no problem at all. The new way is either better, or the old 
way. One way will be picked up more. As I already stated: the more than 
one way is more the combination of basic blocks.

> There have already been threads where it's
> been argued (by others - I just read them) that this is detrimental to
> Python.

There are always language purists, who prefer a minimal set of 
statements, 1001 restrictions, and move everything to libraries. Often I 
have the idea that they don't use libraries at all, but prefer to write 
their own, pure, language.

> Right. But read <URL: http://www.python.org/peps/pep-3000.html > and
> you'll see that many of the things that are now redundant are
> scheduled to go away when we break backwards compatability. The
> philosophy is still that "There should be one-- and preferably only
> one --obvious way to do it." (from "import this"), even if we are
> drifting from that in the current implementations.

:-) I will stay tuned, since I want to add Python to my skill set.

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


From gsakkis at rutgers.edu  Mon Apr 25 22:19:37 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 19:19:37 -0700
Subject: Pythonic way to do static local variables?
References: <_xgbe.128633$cg1.54987@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <1114481977.118530.47110@l41g2000cwc.googlegroups.com>

> I've a function that needs to maintain an ordered sequence between
> calls.
>
> In C or C++, I'd declare the pointer (or collection object) static at
> the function scope.
>
> What's the Pythonic way to do this?
>
> Is there a better solution than putting the sequence at module scope?

Yes, there is; it's called "object oriented programming". In general,
whenever you find that one or more functions have to access a context
that is not passed in explicitly as arguments, the proper (pythonic and
non-pythonic) way is to define them as a method in a class that stores
this context.

class Foo(object):
    def __init__(self):
        self._context = # something

     def method(self):
         x = self._context
         # do stuff
         self._context.update()


Another solution is function/method attributes. This is handy if OO
seems an overkill for a single function, or in case of methods, if you
don't want to pollute the instance namespace with something used by a
single method:

def foo():
    # foo.x is like a C static
    try: foo.x +=1
    except AttributeError:
        foo.x = 1
     return foo.x

for i in xrange(10): print foo()

if foo() is a method, it becomes a little more cumbersome, first
because you have to refer to the class name and (less obviously)
because user defined attributes are not allowed in instance methods (I
wonder why); you have to refer to the wrapped function:

class Foo(object):
    def foo(self):
        try: Foo.foo.im_func.x += 1
        except AttributeError:
            Foo.foo.im_func.x = 1
        return Foo.foo.x

foo = Foo().foo
for i in xrange(10): print foo()


Hope this helps,

George



From artur_spruce at yahoo.com  Tue Apr 19 01:58:00 2005
From: artur_spruce at yahoo.com (AdSR)
Date: 18 Apr 2005 22:58:00 -0700
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<66d861tapjp3fo8duoh8oceinae6ands95@4ax.com>
Message-ID: <1113890280.823358.157580@o13g2000cwo.googlegroups.com>

> Thanks for pointing this out. However I see no atrocity potential
here
> -- what did you have in mind?

Bad choice of words. I meant obfuscated, something like

def z(((a, b), (c, d)), e, f):
    pass

but much worse. But it looks like there is nothing unusual about it
after all. Oh, well...

AdSR



From tom at dtsam.com  Thu Apr 21 13:23:23 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Thu, 21 Apr 2005 12:23:23 -0500
Subject: Regular Expressions - Python vs Perl
References: <1114092105.964664.211430@l41g2000cwc.googlegroups.com>
	<1114098472.768814.281750@g14g2000cwa.googlegroups.com>
	<TIOdnQkhrMfcTPrfRVn-uA@telcove.net> <d48ktk$4ov$1@news.vcd.hp.com>
Message-ID: <RMmdnRLDlZu6fPrfRVn-rQ@telcove.net>

"djw" <dwelch at vcd.hp.com> wrote in message
news:d48ktk$4ov$1 at news.vcd.hp.com...
> >
> While I agree with (most of) your points, one should not overlook the
> fact that there are cases when performance does matter (huge datasets
> maybe?). Since the OP didn't indicate why performance was important to
> him/her, one cannot assume that its not a valid concern.

Yes, yes, but then - the converse would be true.  One cannot assume it *is*
a valid concern.

I could have gone further and pointed out that that RegEx module (now re !)
is probably just C code hooked to Python syntax.  IOW - the execution speed
of his RegEx module has *nothing at all* to do with the Python language,
only the efficiency of the particular code library he was using.

All in all, execution speed for any one particular task is a sucky way to
evaluate a general purpose programming language. If gonzo RegEx query
performance was of utmost importance, would anyone put either of Perl or
Python at the top of his list?

Thomas Bartkus







From macgaw at mat.uni.torun.pl  Sat Apr  9 17:09:54 2005
From: macgaw at mat.uni.torun.pl (dzieciou)
Date: 9 Apr 2005 14:09:54 -0700
Subject: python modules in home dir
Message-ID: <8416c258.0504091309.7ba2047d@posting.google.com>

Hello!

I'm new-comer in Python.
I want to install few Python modules (4Suite, RDFLib, Twisted and Racoon)
in my home directory, since Python installation is already installed in the
system
and I'm NOT its admin.
I cannot install pyvm (portable binary python machine) - have no such big
quota.
Any idea how can I solve it?

Best

maciek


From robin at reportlab.com  Thu Apr 28 09:23:37 2005
From: robin at reportlab.com (Robin Becker)
Date: Thu, 28 Apr 2005 14:23:37 +0100
Subject: regex over files
In-Reply-To: <pan.2005.04.26.19.25.54.737109@jerf.org>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<mailman.2539.1114540486.1799.python-list@python.org>
	<pan.2005.04.26.19.25.54.737109@jerf.org>
Message-ID: <4270E3D9.6010407@chamonix.reportlab.co.uk>

Jeremy Bowers wrote:
.....
> 
> As you try to understand mmap, make sure your mental model can take into
> account the fact that it is easy and quite common to mmap a file several
> times larger than your physical memory, and it does not even *try* to read
> the whole thing in at any given time. You may benefit from
> reviewing/studying the difference between virtual memory and physical
> memory.
I've been using vm systems for 30 years and I suspect my mental model is a bit 
decrepit. However, as convincingly demonstrated by testing my mental model seems 
able to predict low memory problems. When systems run out of memory they tend to 
perform poorly. I'm not sure the horrible degradation I see with large files is 
necessary, but I know it occurs on at least one common vm implementation.
-- 
Robin Becker



From bdesth.quelquechose at free.quelquepart.fr  Mon Apr 11 15:45:01 2005
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 11 Apr 2005 21:45:01 +0200
Subject: Help understanding code
In-Reply-To: <1113137392.623068.128070@o13g2000cwo.googlegroups.com>
References: <mailman.1638.1113136579.1799.python-list@python.org>
	<1113137392.623068.128070@o13g2000cwo.googlegroups.com>
Message-ID: <425acfe0$0$23115$626a14ce@news.free.fr>

elbertlev at hotmail.com a ?crit :
> Reading the language tututorial would help you a lot :(
> 
> === what is the difference between pc and pc()?
> 
> pc = getToolByName(....)  - returnes a refference to a method

Nope.

> pc is a refference to a method, 
> 
Nope.

pc is not 'a reference to a method', it's a callable object (in this 
case a ZCatalog instance...)....

 > pc() is a method invocation.

In this case, it happens to be a call to a method of ZCatalog, but it 
could have been a call to a named or anonymous function as well...

<op>
In Python, functions and methods are objects too, so you can use them 
like any other object :

def fun():
   print "hello world"

machin = fun
machin()
 >> hello world

But objects can be used like functions too, if they define a __call__ 
method:

class fakeFun(object):
   def __init__(self, name):
     self.name = name
   def __call__(self):
      return "hello, I'm %s" % self.name

f= fakeFun('foo')
f()
 >> hello, I'm foo
</op>

HTH
Bruno


From auch-ich-m at g-kein-spam.com  Sun Apr  3 12:17:55 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Sun, 03 Apr 2005 18:17:55 +0200
Subject: re module non-greedy matches broken
References: <115040egk00tf9d@corp.supernews.com>
Message-ID: <20611953.SkRsez8GTE@news.perlig.de>

* lothar wrote:

> re:
> 4.2.1 Regular Expression Syntax
> http://docs.python.org/lib/re-syntax.html
> 
>   *?, +?, ??
>   Adding "?" after the qualifier makes it perform the match in non-greedy
>   or
> minimal fashion; as few characters as possible will be matched.
> 
> the regular expression module fails to perform non-greedy matches as
> described in the documentation: more than "as few characters as possible"
> are matched.
> 
> this is a bug and it needs to be fixed.

The documentation is just incomplete. Non-greedy regexps still start
matching the leftmost. So instead the longest of the leftmost you get the
shortest of the leftmost. One may consider this as a documentation bug,
yes.

nd
-- 
# Andr? Malo, <http://www.perlig.de/> #


From deetsNOSPAM at web.de  Wed Apr 27 17:32:38 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Wed, 27 Apr 2005 23:32:38 +0200
Subject: interactive web graphics
References: <mailman.2600.1114635374.1799.python-list@python.org>
Message-ID: <d4p0dh$4lk$05$1@news.t-online.com>

> I would like a form with progress bars, but I guess
> that would have to be implemented in some special way.
> Sorry if these questions are ill-posed; I am just
> getting my feet wet with python.

Larry already said some true things about this. Let me just add that what
you are after _might_ be done using macromedia flash - as that is a
wide-spread browser plugin with interactive and multimedia capabilities.
But how to do it in flash I've no idea - after all I'm a pythoneer.

Alternatively, SVG might be an option - but I'm not sure if its mature and
powerful enough.

-- 
Regards,

Diez B. Roggisch


From slrn at toetsch.at  Thu Apr  7 10:09:05 2005
From: slrn at toetsch.at (Leopold Toetsch)
Date: Thu, 07 Apr 2005 16:09:05 +0200
Subject: Calling a Perl Module from Python ( future direction of Python)
References: <mailman.1448.1112812981.1799.python-list@python.org>
	<3bkgsvF6d50ppU2@individual.net> <3bkh9tF6d50ppU3@individual.net>
Message-ID: <slrnd5afo1.7gm.slrn@toetsch.at>

Greg Ewing <greg at cosc.canterbury.ac.nz> wrote:
> By the way, is the Parrot project still alive,

Of course.

leo
-- 
Apr 07 17:10:41 lux siggen[5353]: reading next random sig
Apr 07 17:10:41 lux siggen[5353]: open: /usr/bin/fortun:
Apr 07 17:10:41 lux siggen[5353]: No such file or directory


From dwelch at vcd.hp.com  Tue Apr 19 13:43:18 2005
From: dwelch at vcd.hp.com (djw)
Date: Tue, 19 Apr 2005 10:43:18 -0700
Subject: Refactoring in Python.
In-Reply-To: <mailman.2120.1113930792.1799.python-list@python.org>
References: <8764yiog3y.fsf@hector.domek>
	<mailman.2120.1113930792.1799.python-list@python.org>
Message-ID: <d43g5p$og0$1@news.vcd.hp.com>

Skip Montanaro wrote:
>     Peter> I am trying to write Master Thesis on refactoring Python code.
> 
>     Peter> Where should I look for information?
> 
> I'm not sure, but one piece of code to check out would probably be Bicycle
> Repair Man, a early-stage prototype refactoring tool for Python.  I don't
> recall where it's hosted.  Google will know.
> 
> Skip
> 
If you install Eric3, its included.

-Don


From prabapython at yahoo.co.in  Tue Apr 19 02:04:42 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Tue, 19 Apr 2005 07:04:42 +0100 (BST)
Subject: module MySQLdb is missing in python 2.3.3
Message-ID: <20050419060442.8331.qmail@web8406.mail.in.yahoo.com>

Dear All,

   I am using python 2.3.3 version.  If I try to
import MySQLdb.  Here I found " the following
error"
importError: No module named MySQLdb.

So what I need to do for this ?.  How I need to
install this MySQLdbo.

praba 

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


From eurleif at ecritters.biz  Fri Apr  8 15:04:42 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 08 Apr 2005 19:04:42 GMT
Subject: unknown encoding problem
In-Reply-To: <d361u0$152$1@news2.rz.uni-karlsruhe.de>
References: <d361u0$152$1@news2.rz.uni-karlsruhe.de>
Message-ID: <eBA5e.494$5I5.31407@newshog.newsread.com>

Uwe Mayer wrote:
> Hi,
> 
> I need to read in a text file which seems to be stored in some unknown
> encoding. Opening and reading the files content returns:
> 
> 
>>>>f.read()
> 
> '\x00 \x00 \x00<\x00l\x00o\x00g\x00E\x00n\x00t\x00r\x00y\x00...
> 
> Each character has a \x00 prepended to it. I suspect its some kind of
> unicode - how do I get rid of it? 

f.read().decode('utf16')


From shane at hathawaymix.org  Sat Apr 16 03:06:25 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Sat, 16 Apr 2005 01:06:25 -0600
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <42607b0f$1_2@newspeer2.tds.net>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<42607b0f$1_2@newspeer2.tds.net>
Message-ID: <4260B971.8010309@hathawaymix.org>

Kent Johnson wrote:
> Brian Sabbey wrote:
>> Using suite-based keyword arguments, the code
>>
>> f(x = 1)
>>
>> is equivalent to
>>
>> f():
>>    x = 1
> 
> 
> ISTM the syntax is ambiguous. How do you interpret
> if f():
>   x = 1
> ?
> 
> Is a suite alllowed only when a block could not be introduced in the
> current syntax?

I like this PEP a lot, but your concern is valid.  Maybe Brian could
modify the PEP slightly to disambiguate.  How about using an ellipsis in
the argument list to signify suite-based keywords?  Examples:

f(...):
    x = 1

class C(object):
   x = property(...):
      doc = "I'm the 'x' property."
      def fget(self):
         return self.__x
      def fset(self, value):
         self.__x = value
      def fdel(self):
         del self.__x

d = dict(...):
    a = 1
    b = 2

Using an ellipsis in a statement that would begin a different kind of
block is illegal and generates a syntax error.  Note that this usage
seems to fit well with the definition of "ellipsis".

http://dictionary.reference.com/search?q=ellipsis

Shane


From mahs at telcopartners.com  Thu Apr 21 20:27:29 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 21 Apr 2005 17:27:29 -0700
Subject: Semi-newbie, rolling my own __deepcopy__
In-Reply-To: <1114122554.228545.105700@g14g2000cwa.googlegroups.com>
References: <1112629066.785241.275670@z14g2000cwz.googlegroups.com>
	<1114122554.228545.105700@g14g2000cwa.googlegroups.com>
Message-ID: <d49g4a$onn$1@sea.gmane.org>

ladasky at my-deja.com wrote:
> I'm back...
[wondering why copy.deepcopy barfs on array instances]
> 

http://www.python.org/doc/2.3.3/lib/module-copy.html
deepcopy:
...
This version does not copy types like module, class, function, method, stack 
trace, stack frame, file, socket, window, *array*, or any similar types.
...

which you can see, by doing:
  >>> a = array("d",[random() for x in range(3)])
  >>> b = deepcopy(a)
  Traceback (most recent call last):
    File "<input>", line 1, in ?
    File "C:\Python24\lib\copy.py", line 172, in deepcopy
      y = copier(memo)
  TypeError: __deepcopy__() takes no arguments (1 given)

In any case there's is no difference between deep and shallow - copying an 
array, since it can contain only scalars, rather than compound objects:

http://www.python.org/doc/2.3.3/lib/module-copy.html
The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, like lists or
class instances).


array does have a __deepcopy__ method, albeit not compatible with copy.deepcopy. 
  You can use this to make the (shallow) copy.

  >>> b = a.__deepcopy__()


Michael



From scmarsh at hotmail.com  Mon Apr 18 13:38:03 2005
From: scmarsh at hotmail.com (scott)
Date: Mon, 18 Apr 2005 17:38:03 GMT
Subject: EasyDialogs module problem with python 2.4.1
In-Reply-To: <C4S8e.1063265$Xk.1017278@pd7tw3no>
References: <C4S8e.1063265$Xk.1017278@pd7tw3no>
Message-ID: <%fS8e.1066640$6l.831254@pd7tw2no>

scott wrote:
> First my setup:
> 
> I'm using the framework build of Python 2.4.1
> 
> ( http://bob.pythonmac.org/archives/2005/03/31/macpython-241-installer/ )
> 
> on an ibook G4 running Mac OS 10.3.8.
> 
> I installed wxPython 2.5.5.1 ( Unicode runtime 2.5.5.1 for the Panther 
> version of Macpython-OSX 2.4 )
> 
> ( http://wxpython.org )
> 
> Now my problem:
> 
> EasyDialogs module
> 
> ( http://www.python.org/doc/2.4.1/mac/module-EasyDialogs.html )
> 
> works with pyshell (interactive python program included with wxPython) 
> but not with python launched at the terminal:
> ie:
> 
> -----------------------
> 
> PyShell 0.9.4 - The Flakiest Python Shell
> Sponsored by Orbtech - Your source for Python programming expertise.
> Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>  >>>import EasyDialogs
>  >>>EasyDialogs.Message('hi')

Sorry, the rest of the message:

At the terminal, EasyDialogs doesn't work:

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

Last login: Mon Apr 18 10:30:53 on console
Welcome to Darwin!
scott$ python
Python 2.4.1 (#2, Mar 31 2005, 00:05:10)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1666)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import EasyDialogs
 >>> EasyDialogs.Message('hi')
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File 
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac/EasyDialogs.py", 
line 75, in Message
     _interact()
   File 
"/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/plat-mac/EasyDialogs.py", 
line 53, in _interact
     AE.AEInteractWithUser(50000000)
MacOS.Error: (-1713, 'no user interaction is allowed')
 >>>

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

I want to use EasyDialogs as a user front end for some simple scripts 
and can't do that until this issue is resolved. Thanks in advance.


From anusha2505 at yahoo.com  Sun Apr 24 13:13:45 2005
From: anusha2505 at yahoo.com (Anusha)
Date: Sun, 24 Apr 2005 17:13:45 -0000
Subject: Awesome Directory
Message-ID: <d4gk49+3v81@eGroups.com>


Hello there,

Try visiting this well listed Directory on Computers and Internet! ...

Here is the link http://hi-fiweb.com/comp

Hoping to learn a lot from other group members.

Take care,
Kathy





From Bill at SynectixLtd.com  Wed Apr 20 07:07:45 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Wed, 20 Apr 2005 11:07:45 +0000 (UTC)
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
References: <d4080i$q8d$1@titan.btinternet.com>
	<mailman.2056.1113844188.1799.python-list@python.org>
	<d42ilb$dk0$1@titan.btinternet.com>
	<1113921056.163970.216730@g14g2000cwa.googlegroups.com>
Message-ID: <d45d61$pj3$1@sparta.btinternet.com>

Thank you Khalid,



OK.  (4) (compile using MSVC6) worked.



Now working through various issues to do with paths and naming (_d suffix to 
root for DEBUG, _ prefix to root for SWIG, and I had not spotted that SWIG 
makes Module.py that imports _Module.pyd but not _Module_d.pyd for DEBUG 
builds).



I'd like to persuade IDLE to use my locally compiled version of Python 
rather than the one I downloaded, and will find out how eventually. 
Necessary to keep to a VC6 build of 2.4.1 throughout.



Rgds,

    Bill (an inveterate top poster, I'm afraid).


"A.B., Khalid" <abkhd at earth.co.jp> wrote in message 
news:1113921056.163970.216730 at g14g2000cwa.googlegroups.com...
> Okay, let me have another stap at this.
>
> As you have probably noticed MSVC6 is no longer actively supported as
> far as Python 2.4 goes. The official distribution of Python 2.4 for
> Windows is built using MSVC7.1 (or whatever you wish to call it).
>
> We are told that building C extensions with MSVC6 for use in the
> official Python 2.4 (which uses the MSVCR71) is not safe, and mixing
> the different runtime libraries that your extension (or my extension)
> with that which official Python 2.4 uses will/might cause crashes.
> Google around for details on this.
>
> So, what to do? You seem to have four options.
>
> 1. Get and use the MSVC7.1 compiler.
> 2. Get and use the freely distributed MS compiler.
> 3. Download the Python source[1] and compile it yourself in MSVC6
> (there are project files in the source to enable you to do that). Then
> use your MSVC6 to create the extension.
> 4. Get and use MinGW and pyMinGW[2]
>
>
>
>
> Regards,
> Khalid
>
>
>
>
> [1] Check to see if your archiever tool is working, or get the source
> from CVS.
>
> [2] pyMinGW:
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
> 




From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 08:48:40 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 13:48:40 +0100
Subject: preallocate list
Message-ID: <d3j4ds$njr$1@scotsman.ed.ac.uk>

Hi all

Is this the best way to preallocate a list of integers?
listName = range(0,length)

What about non integers?

I've just claimed in the newsgroup above that pre-allocating helps but I 
might be getting confused with matlab ;)

If I have a file with a floating point number on each line, what is the 
best way of reading them into a list (or other ordered structure)?

I was iterating with readline and appending to a list but it is taking ages.

Jim


From steve at holdenweb.com  Fri Apr  8 15:49:42 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 15:49:42 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36mds$l3q$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>	<78f6595afdb48aabb9c72dfe549a543e@upf.edu>
	<d36mds$l3q$1@sea.gmane.org>
Message-ID: <d36n3h$n0s$1@sea.gmane.org>

jeremit0 wrote:
> harold fellermann wrote:
> 
>> file.readlines() returns a list of lines. You can either call find on 
>> each
>> element in this list, like:
>>
>> for line in myfile.readlines() :
>>     if line.find('my particular string') :
>>         do_something()
>>
> I had thought that may be the only way to do it, I was hoping for 
> something simpler as I wrote earlier.
> Thanks for your help,
> Jeremy
> 
If you want line numbers,. of course, then you can use

   for linenum, line in enumerate(myfile.readlines()):
       ...

Remember that true to Python's philosophy numbering will start at zero.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From auch-ich-m at g-kein-spam.com  Tue Apr  5 15:44:10 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Tue, 05 Apr 2005 21:44:10 +0200
Subject: regexp weirdness (bug?)
References: <1112715308.737856.234580@z14g2000cwz.googlegroups.com>
	<2584344.b1EHUGjtUV@news.perlig.de>
	<mailman.1395.1112720052.1799.python-list@python.org>
Message-ID: <1186100.a9ONk7P8cn@news.perlig.de>

* Fredrik Lundh wrote:

> Andr? Malo wrote:
> 
>> No, I suppose they shouldn't compile.
>> _re_pair should be (?P=plus).
> 
> the (?(NAME)RE|RE) form was added in 2.4.
> 
> looks like a bug to me; the "plus" group is set to "+" in all four cases,
> so the
> final pattern should match.  but I might be missing something...

Uh, yeah, I'm not up to date and still using 2.3 ;)
However, I've investigated a bit in the sre code and found this in
sre_compile.py:

   150          elif op is GROUPREF_EXISTS:
   151              emit(OPCODES[op])
   152              emit((av[0]-1)*2)
   153              skipyes = _len(code); emit(0)
   154              _compile(code, av[1], flags)

Sergey, can you please change line 152 in your sre_compile.py to

emit(av[0]-1)

and see if it works then? (The matcher also multiplies with 2, so this is
most likely the bug). But it's just theoretically, since I don't have
python 2.4 installed for a test :)

nd


From smitty_one_each at bigfoot.com  Sat Apr  2 14:11:54 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Sat, 02 Apr 2005 14:11:54 -0500
Subject: Controling the ALU
References: <mailman.1150.1112300230.1799.python-list@python.org>
Message-ID: <uy8c1hu2t.fsf@bigfoot.com>

>>>>> "Cesar" == Cesar Andres Roldan Garcia <cesar.andres at gmail.com> writes:

    Cesar> Hi How can I control an ALU from a PC using Python?

    Cesar> Thanks!


    Cesar> Hola...

    Cesar> Como puedo controlar la ALU de un PC usando Pyhton?

    Cesar> Gracias!

    Cesar> -- Atentamente,

    Cesar> Cesar Andres Roldan Garcia Presidente Comunidad Acad?mica
    Cesar> Microsoft Javeriana Tel?fono: 300 8169857 Cali - Colombia

For a loose value of 'using', you could do your numerically-intensive
work in C++, inline all the assembler necessary, and then fashion a
python module thereof using boost::python.
I wouldn't pretend to be capable of doing that at this very moment,
but if I had such a requirement, this would be my initial course.
Best,
Chris


From dotpyFE at gmail.com  Mon Apr  4 08:09:19 2005
From: dotpyFE at gmail.com (Lucas Raab)
Date: Mon, 04 Apr 2005 12:09:19 GMT
Subject: What's up with the PyFX Project??? (ex PyCG nVidia CG
	implementation)
In-Reply-To: <1112611945.600073.89550@g14g2000cwa.googlegroups.com>
References: <1112611945.600073.89550@g14g2000cwa.googlegroups.com>
Message-ID: <P7a4e.3705$44.2533@newsread1.news.atl.earthlink.net>

tc wrote:
> Does anyone know why there's no progress on the pyfx project??
> (http://graphics.cs.lth.se/pyfx)
> 
> What are the pro and con's for such an implementation to actually
> program a 3d game (engine)??
> 
> I started off a while ago in c++ to play around a bit with directx
> opengl and cg but I'd rather like to program in a language such as
> python...
> 
> PyGame doesn't meet my need's because i'd like to take adantage of the
> much faster directx technology.
> 
> Any comments, hints?
> 
> Greets TC
> 

Panda3D might be what you're looking for. http://panda3d.etc.cmu.edu. 
It's an open-source 3D engine. Python is the main language used to 
program the games. While you can use C++ or other languages, they aren't 
as well supported.

-- 
--------------------------
Lucas Raab
lvraab"@"earthlink.net
dotpyFE"@"gmail.com
AIM:	Phoenix11890
MSN:	dotpyfe"@"gmail.com
IRC:	lvraab
ICQ:	324767918
Yahoo:	Phoenix11890


From bektek at gmail.com  Tue Apr 19 17:14:59 2005
From: bektek at gmail.com (bektek)
Date: 19 Apr 2005 14:14:59 -0700
Subject: newbie question
Message-ID: <465db603.0504191314.5d074cf8@posting.google.com>

I heard that python or other script languages can be used as game scripting..
Actually It's so hard to understand what that means for newbies like me?

What's mean being used as game script?
Could show me simple example like 'hello world'?

I'll be appreciated..


From rkern at ucsd.edu  Mon Apr 25 16:26:19 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 13:26:19 -0700
Subject: What's do list comprehensions do that generator   expressions
 don't?
In-Reply-To: <pan.2005.04.25.19.29.02.291034@jerf.org>
References: <86ll77pgqz.fsf@guru.mired.org>	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
Message-ID: <d4jjfn$kr1$1@sea.gmane.org>

Jeremy Bowers wrote:
> On Sun, 24 Apr 2005 22:59:12 -0700, Robert Kern wrote:
> 
>>Never. If you really need a list
>>
>>list(x*x for x in xrange(10))
>>
>>Sadly, we can't remove list comprehensions until 3.0.
> 
> 
> Why "remove" them? Instead, we have these things called "comprehensions"
> (which, now that I say that, seems a rather odd name), and you can control
> whether they result in a list or a generator with () or [].

They are *not* the same thing. They have completely different 
implementations although they have very similar syntax and the former 
subsumes just about *every* use of the latter. That's pointless except 
for maintaining backwards compatibility. The difference in 
implementation is one reason why generator expressions were not called 
generator comprehensions.

What's more, the list comprehension implementation is warty. It leaks 
variables.

> I don't see why they need to be "removed". Lists are already a special
> case of the "only one way to do it" principle ([] vs. list()),  and
> pragmatically I don't see any reason to remove them here; it doesn't add
> comprehensibility,

Yes it does. The OP was confused as to which to use now that both exist. 
This has come up here before.

> leaving them in doesn't significantly affect the mental
> size of the code (the *comprehension* is the hard part, the final form
> should be relatively simple), it's not worth breaking that code.

Like I said, this would only happen at 3.0 when all of your code will 
break anyways.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From roy at panix.com  Mon Apr  4 19:59:20 2005
From: roy at panix.com (Roy Smith)
Date: Mon, 04 Apr 2005 19:59:20 -0400
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
	<6oQ3e.10378$db.6219@trndny07> <878y3y6ts4.fsf@pobox.com>
	<pan.2005.04.04.23.26.28.468507@jerf.org>
Message-ID: <roy-C3F02C.19592004042005@reader1.panix.com>

In article <pan.2005.04.04.23.26.28.468507 at jerf.org>,
 Jeremy Bowers <jerf at jerf.org> wrote:

> On Mon, 04 Apr 2005 22:50:35 +0000, John J. Lee wrote:
> > What I don't understand about py.test (and trying it out seems
> > unlikely to answer this) is why it uses the assert statement.
> > unittest used to do that, too, but then it was pointed out that that
> > breaks when python -O is used, so unittest switched to self.assert_
> > &c.  Does py.test have some way around that?
> 
> "Don't use -O because it doesn't do anything significant?"
> 
> Is this an issue in practice? (Honest question.) If -O did something
> interesting I might use it, but I don't think it does. 

The following program produces different output depending on whether you 
run it with -O or not:

try:
    assert 0
    print "I am running with -O"
except AssertionError:
    print "I'm not"


From apardon at forel.vub.ac.be  Thu Apr 21 04:18:48 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 08:18:48 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<d45fq7$bsq$1@iss-nntp.leeds.ac.uk>
	<87r7h5lk5a.fsf@wilson.rwth-aachen.de>
	<slrnd6ck41.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2174.1114003199.1799.python-list@python.org>
	<slrnd6cmss.ge8.apardon@rcpc42.vub.ac.be>
	<mailman.2178.1114006723.1799.python-list@python.org>
	<slrnd6ei0q.ge8.apardon@rcpc42.vub.ac.be>
	<9LI9e.28173$1p4.20603@trndny06>
Message-ID: <slrnd6eof7.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-21, Raymond Hettinger schreef <vze4rx4y at verizon.net>:
> [Antoon Pardon]
>> I don't see why the start index can't be accessible through
>> a method or function just like the length of a list is now.
>>
>> My favourite would be a range method so we would have
>> the following idiom:
>>
>>   for i in lst.range():
>>     do something with lst[i]
>
> After going to all that trouble, you might as well also get the value at that
> position:
>
> for i, x in enumerate(lst):
>     do something with lst[i] also known as x

No you wouldn't, enumerate always starts with 0.

So if you write a class with list-like behaviour except that the
start index can be different from 0, enumerate is useless
because lst[i] won't be x in that case.

-- 
Antoon Pardon


From fred.dixon at gmail.com  Wed Apr 13 11:22:04 2005
From: fred.dixon at gmail.com (fred.dixon)
Date: 13 Apr 2005 08:22:04 -0700
Subject: sort of a beginner question about globals
In-Reply-To: <GpSdndekpZygqMDfRVn-hw@comcast.com>
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
Message-ID: <1113405724.301516.232000@f14g2000cwb.googlegroups.com>

how would i use the following if OPTIONS was in a module ?
-----------------------
from optparse import OptionParser

usage = "usage: %prog [options] arg"
parser = OptionParser(usage)

parser.add_option("-d", "--debug", ction="store_true", dest="verbose")
(OPTIONS = parser.parse_args()

ps
Im not anywhere near my program right now just doing some kunch time
surfing.



From rune.froysa at usit.uio.no  Wed Apr 20 05:19:35 2005
From: rune.froysa at usit.uio.no (Rune Froysa)
Date: Wed, 20 Apr 2005 11:19:35 +0200
Subject: xmlrpclib and binary data as normal parameter strings
References: <svlacnvhrov.fsf@dresden.uio.no>
	<d42vib$2ar$1@blackmamba.itd.rl.ac.uk>
Message-ID: <svl3btliz4o.fsf@dresden.uio.no>

"Richard Brodie" <R.Brodie at rl.ac.uk> writes:

> "Rune Froysa" <rune.froysa at usit.uio.no> wrote in message news:svlacnvhrov.fsf at dresden.uio.no...
>
>> From http://www.xmlrpc.com/spec ::
>>   Any characters are allowed in a string except < and &, which are
>>   encoded as &lt; and &amp;. A string can be used to encode binary
>>   data.
>
> the XMLRPC specification is worded pretty loosely. Obviously characters
> forbidden in XML will be problematic.

IMHO that is not obvious.  The API-user wants to call a function on a
remote server with an arbitrary argument.  What the transport-layer
does to achieve this should be completly transparent to the user.

We already have code that takes care of "&<>".  Ideally we should do
that for other data as well.  Unfortunately the XML-spec doesn't allow
us to use character references "&%#x1b;".

With the patch below, setting BINARY_AS_STRING=True will cause all
strings to be transparently base64-encoded during transport.
Unfortunately it will do this for all incoming binary data, thus
breaking aplications that explicitly uses the Binary class for this
purpose.

IMHO the xmlrpc spec should be updated to allow something like this.

--- /local/lib/python2.3/xmlrpclib.py      2005-01-10 10:30:43.000000000 +0100
+++ xmlrpclib.py        2005-04-20 09:56:11.000000000 +0200
@@ -177,6 +177,8 @@
 
 __version__ = "1.0.1"
 
+BINARY_AS_STRING = False
+
 # xmlrpc integer limits
 MAXINT =  2L**31-1
 MININT = -2L**31
@@ -652,6 +654,11 @@
     dispatch[FloatType] = dump_double
 
     def dump_string(self, value, write, escape=escape):
+        if BINARY_AS_STRING:
+            self.write = write
+            Binary(value).encode(self)
+            del self.write
+            return
         write("<value><string>")
         write(escape(value))
         write("</string></value>\n")
@@ -843,7 +850,10 @@
     def end_base64(self, data):
         value = Binary()
         value.decode(data)
-        self.append(value)
+        if BINARY_AS_STRING:
+            self.append(value.data)
+        else:
+            self.append(value)
         self._value = 0
     dispatch["base64"] = end_base64
 
-- 
Rune Fr?ysa


From rkern at ucsd.edu  Sun Apr 10 16:34:07 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 10 Apr 2005 13:34:07 -0700
Subject: numarray.array can be VERY slow
In-Reply-To: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
References: <ctKdnQ3HuObdFMTfRVn-hw@comcast.com>
Message-ID: <d3c2em$iud$1@sea.gmane.org>

Edward C. Jones wrote:
> Steven Bethard wrote:
> 
>  > As mentioned, this has nothing to do with numarray, and everything to
>  > do with your inexplicable use of lists.  Why don't you just write this
>  > as:
>  >
>  > arr = numarray.ones((8, 8, 256, 256), Float64)
> 
> The code I posted was simplified from a larger program which I have now 
> revised. But I still ask: why did it take 4.3 seconds to run?

Because lists of lists of arrays are difficult to work with.

Lists of arrays are relatively easy to work with: numarray checks to see 
if all the items are compatible arrays. If they are, then the arrays are 
all concatenated and you have your final array fairly quickly.

List of lists of arrays are more problematic. Currently, the code 
doesn't check that that the objects it sees are arrays, so it interprets 
the arrays as sequences of sequences, and uses the PySequence_* 
protocol. So you might as well have used list of lists of lists of lists.

See the function setArrayFromSequence in libnumarraymodule.c . If you 
wish to fix this behavior, I'm sure that a patch would be welcomed. 
Further questions should probably go to the numarray mailing list.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From peter at engcorp.com  Wed Apr 20 20:10:44 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 20:10:44 -0400
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <mailman.2194.1114019902.1799.python-list@python.org>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<mailman.2194.1114019902.1799.python-list@python.org>
Message-ID: <epidneaJCJtbcvvfRVn-jA@powergate.ca>

James Carroll wrote:
> If you have five elements, numbered 0,1,2,3,4  and you ask for the
> elements starting with the first one, and so on for the length you
> would have [0:length].  So [0:5] gives you elemets 0,1,2,3,4.   Think
> of the weirdess if you had to ask for [0:length-1] to get length
> elements...
[...]
> It is a little weired that slicing does [index: count] instead of
> [index:index] or [count:count] I agree, but python really does just
> flow wonderfully once you see how clean code is that's written [index:
> count].

I think you got confused part way through that.  Python's
slices are *not* index:count, but are index:index.  It's
just that for the example you gave, starting at 0, they
happen to amount to the same thing...

-Peter


From ptmcg at austin.rr.com  Thu Apr 21 09:40:27 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 21 Apr 2005 06:40:27 -0700
Subject: XML parsing per record
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
Message-ID: <1114090827.338772.142100@z14g2000cwz.googlegroups.com>

Don't assume that just because you have a 2.4G XML file that you have
2.4G of data.  Looking at these verbose tags, plus the fact that the
XML is pretty-printed (all those leading spaces - not even tabs! - add
up), I'm guessing you only have about 5-10% actual data, and the rest
is just XML tagging/untagging and spaces.  (For example, 373 characters
used to represent a date/time - this is a sin!)

As XML goes, this looks pretty dead easy to parse with non-XML parser
means.  It looks like all of your leaf nodes open and close on the same
line, which would be easy to extract with regexp's or pyparsing.
Especially since you mention "I only need some of the informtion", you
don't even have to build a full document tree representation.  SAX
parsers would also be good, since you could only trigger on the
matching subset of tags that you are really interested in.  Lastly, you
could even try a pyparsing approach.  I usually don't recommend
pyparsing for XML since there are already many good XML-targeted tools
out there, but it is very easy to throw together something in pyparsing
that extracts, say, all of the <object-id_id> entries, or all of the
<gene-source> structures.  What is the subset of information you are
looking to extract?

-- Paul



From harlinseritt at yahoo.com  Fri Apr  1 06:21:12 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 1 Apr 2005 03:21:12 -0800
Subject: Combining digit in a list to make an integer
Message-ID: <1112354472.859466.273480@f14g2000cwb.googlegroups.com>

I have the following:

num1 = ['1', '4', '5']

How can I combine the elements in num1 to produce an integer 145?

thanks,

Harlin Seritt



From peter at engcorp.com  Sat Apr 30 11:00:53 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 30 Apr 2005 11:00:53 -0400
Subject: Killing process
In-Reply-To: <1114832689.316806.136670@l41g2000cwc.googlegroups.com>
References: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>
	<k8KdnRntjOUZQu_fRVn-qQ@powergate.ca>
	<1114832689.316806.136670@l41g2000cwc.googlegroups.com>
Message-ID: <1IidnevlD6E2AO7fRVn-qg@powergate.ca>

Harlin Seritt wrote:
> I think I need something besides TerminateProcess(). Is there anyway
> possible to terminate a process by just passing a string value to the
> function? Honestly, I am not interesting in terminating a process by
> its handle.

This is a bizarre request.  Why can't you just call int() as you did in 
your example to turn the string into a number?  And if you can do that, 
why would you have a problem using the *defined mechanism* to convert 
from a PID to a handle, which is what the Windows API routine to kill 
processes requires?

-Peter


From max2 at fisso.casa  Fri Apr  1 14:32:00 2005
From: max2 at fisso.casa (max(01)*)
Date: Fri, 01 Apr 2005 19:32:00 GMT
Subject: redundant imports
In-Reply-To: <juudnZEu35NXvNHfRVn-jg@powergate.ca>
References: <Cdx2e.1135983$35.42258107@news4.tin.it>
	<3avnh3F6cekgkU1@individual.net>
	<fZU2e.718439$b5.32462435@news3.tin.it>
	<juudnZEu35NXvNHfRVn-jg@powergate.ca>
Message-ID: <Qkh3e.1153576$35.42709917@news4.tin.it>

Peter Hansen wrote:
> max(01)* wrote:
> 
>> this leads me to another question. since *.pyc files are automatically 
>> created the first time an import statement in executed on a given 
>> module, i guess that if i ship a program with modules for use in a 
>> directory where the user has no write privileges then i must ship the 
>> *.pyc files along too. right?
> 
> 
> Not required except for performance reasons.  If the .pyc
> files don't exist, the .py files are recompiled and the
> resulting bytecode is simply held in memory and not cached
> and the next startup will recompile all over again.
> 
> Note also that the main file (the one invoke from the
> command line) is never cached in a .pyc...

but the other files *are* compiled, right? so the initial question 
remains unanswered: *if* they are compiled, where are they put, if the 
corresponding *.py files are on a non-writeable directory?


From raver2046 at gmail.com  Tue Apr 26 08:20:07 2005
From: raver2046 at gmail.com (raver2046)
Date: Tue, 26 Apr 2005 14:20:07 +0200
Subject: How to exctract title of links
Message-ID: <426e31e9$0$12342$626a14ce@news.free.fr>

here i have a link  <a href="http://raver2046.ath.cx/CV/">cv network 
admin</a>

how to extract  "cv network admin"


here is the code i have find to exctract link but not title of link

----------------------------
import htmllib, formatter, urllib
class x(htmllib.HTMLParser):
    def dump(self, tag, attrs):
        #print tag,
        for a, v in attrs:
            if a in ['a', 'src', 'href']:
                print v,

        print
    #def do_img(self, attrs):
    #    self.dump('img', attrs)
    def start_a(self, attrs):
        self.dump('a', attrs)
    #def start_form(self, attrs):
    #    self.dump('form', attrs)

y = x(formatter.NullFormatter())
y.feed(urllib.urlopen('http://www.aquabase.org/fish/dump.php3').read())
y.close()


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

http://raver2046.ath.cx/CV/cv_fr.html 




From grante at visi.com  Fri Apr 22 15:02:15 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 19:02:15 -0000
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
Message-ID: <116iihncpcr5057@corp.supernews.com>

On 2005-04-22, dcrespo <dcrespo at gmail.com> wrote:

> Hi all... Is there a way to print a PDF file directly from
> Python without having Acrobat installed?

Assuming your printing system was setup competently:

   os.system("lpr %s" % filename)

> I know about ReportLab. It's a python module that lets you
> create almost any PDF document, but I still don't know if it
> supports printing, so I'm looking for a Python module that
> could do it. I want to print a PDF file just like if I were
> doing it from Acrobat.

Not sure what you mean by "just like if I were doing it from
Acrobat".

-- 
Grant Edwards                   grante             Yow!  I have seen these
                                  at               EGG EXTENDERS in my
                               visi.com            Supermarket... I have read
                                                   theINSTRUCTIONS...


From aahz at pythoncraft.com  Fri Apr 22 19:59:12 2005
From: aahz at pythoncraft.com (Aahz)
Date: Fri, 22 Apr 2005 16:59:12 -0700
Subject: BayPIGgies: May *THIRD* Thursday at Google (May 19)
Message-ID: <20050422235912.GA18020@panix.com>

Pre-announcement:

Our May meeting will be the *THIRD* Thursday, May 19.  We will *NOT* be
meeting the *SECOND* Thursday.  This will be our first meeting at Google,
with Alex Martelli's presention on design patterns.  More details later!
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From roy at panix.com  Wed Apr 13 12:06:26 2005
From: roy at panix.com (Roy Smith)
Date: 13 Apr 2005 12:06:26 -0400
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
	<425d3b01$1@nntp0.pdx.net>
Message-ID: <d3jg22$hvn$1@panix2.panix.com>

Scott David Daniels  <Scott.Daniels at Acm.Org> wrote:
>If you think those are fun, try base (1j - 1)

Get real.  I can't imagine using anything so complex.


From steve at holdenweb.com  Wed Apr  6 15:13:08 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 06 Apr 2005 15:13:08 -0400
Subject: Calling a Perl Module from Python ( future direction of Python)
In-Reply-To: <20050406184257.71587.qmail@web20707.mail.yahoo.com>
References: <351e8871050406092449d4585b@mail.gmail.com>
	<20050406184257.71587.qmail@web20707.mail.yahoo.com>
Message-ID: <425434C4.4050904@holdenweb.com>

gf gf wrote:
> Really!  That's a pity... Instead of trying to
> recreate a repository the size of CPAN, a Python
> interface to Perl modules is really called for.
> 
Something like pyperl, for example?

> Instead of fretting over decorator syntax and
> lispiness, might I suggest that development efforts be
> directed to this?  Developers, are you listening? 
> Guido?
> 
> PS And I don't mean waiting for Perl 6 to condense...
> 
Yes, the development team don't have anything better to do than listen 
to the opinions of people who don't even identify themselves. I'm sure 
you have proved your dedication to Python so explicitly that they'll 
already be working on this problem :-)

You might also look at the work Richard Jones and others did on PyPI 
during their PyCon sprint. Richard was confident that PyPI

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From donn at u.washington.edu  Mon Apr 25 20:43:01 2005
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 25 Apr 2005 17:43:01 -0700
Subject: select() on pipe
References: <mailman.2490.1114473024.1799.python-list@python.org>
Message-ID: <donn-700A78.17430125042005@gnus01.u.washington.edu>

In article <mailman.2490.1114473024.1799.python-list at python.org>,
 Brad Murdoch <brad at it.alliedpress.co.nz> wrote:

> im trying to run the select.selct() on a unix pipe, my expectation is 
> that it will block untill there is something there to read, then 
> continue. It seems to do this untill the pipe is written to once, then i 
> get a busy while loop.
> shouldnt this stop each time, to wait  for something to be written to 
> the pipe. obviously im a novice when it comes to python programming, 
> what am i missing here.


> try:
>  fifo = open('test.fifo','r')

> while 1:
>  line = False
>  r,w,x = select.select([fifo],[],[])
>  if r:
>     line=fifo.read()
>     print line


Well, two things, neither of them really unique to
Python.  The immediate problem is the semantics of
pipe I/O, specifically "end of file."  For pipes
and other IPC devices, end of file means that the
the other end of the file has been closed, which
your "the pipe is written to" event probably does.
>From this point on, read(2) returns 0 bytes, which
means end of file.  If you want to go back and do
this again, you need to re-open the pipe.

The second problem will bite you as soon as you get
the first part working:  fifo.read() is going to
block until the pipe closes.  If you switch to
fifo.readline(), select may start failing to detect
data that readline() buffers.   For more reliable
I/O in conjunction with select(), use POSIX I/O:

   fifd = os.open('test.fifo', os.O_RDONLY)
   ...
   while 1:
       ...
           data = os.read(fifd, 8192)
 
   Donn Cave, donn at u.washington.edu


From vedanta.barooah at gmail.com  Fri Apr 22 18:44:41 2005
From: vedanta.barooah at gmail.com (Vedanta Barooah)
Date: Sat, 23 Apr 2005 04:14:41 +0530
Subject: Threading question
In-Reply-To: <426964d3$1_2@newspeer2.tds.net>
References: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>
	<42694464$1_1@newspeer2.tds.net>
	<1114196933.272932.50640@f14g2000cwb.googlegroups.com>
	<426964d3$1_2@newspeer2.tds.net>
Message-ID: <c52b4e4c05042215444e5f8dbf@mail.gmail.com>

there is a pwthonw.exe for windows python installations which does not
spawn a console window... is that what you are looking for ;)


On 4/23/05, Kent Johnson <kent37 at tds.net> wrote:
> codecraig wrote:
> > Kent,
> >    thanks for the idea of doSomethingThreaded....that's really cool!
> 
> You're welcome, and welcome to Python. I am a convert from Java myself.
> 
> You will find that many things that you would do with inner classes in Java, you can do much more
> directly with function references in Python. First class functions are your friends :-)
> 
> Kent
> --
> http://mail.python.org/mailman/listinfo/python-list
> 


-- 
*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*
Vedanta Barooah
YM! - vedanta2006
Skype - vedanta2006


From mwm at mired.org  Tue Apr 26 06:03:27 2005
From: mwm at mired.org (Mike Meyer)
Date: Tue, 26 Apr 2005 05:03:27 -0500
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org>
Message-ID: <86is29n9cg.fsf@guru.mired.org>

Maurice LING <mauriceling at acm.org> writes:

>> All you have to do is convince the developers to declare the set of
>> bytecodes fixed, and they'd be stable. I don't think that will be
>> easy, as it removes one of the methods used to improve the performance
>> of Python. Since rebuilding the bytecode files is trivial (just invoke
>> compileall.py in the library as a script), this isn't really a
>> problem. The only thing that breaks are modules that muck about inside
>> the bytecode. I don't know how much bytecode improvements have sped
>> things up, but I do know that if I ever used a module that mucked
>> around with byte codes, I wasn't aware of it - so this is a tradeoff
>> I'm more than happy to make.
>>
>
> Thanks Mike,
>
> My arguments to the developers will be:
>
> 1. Python had gone from a purely scripting language to a general
> purpose programming language.

I think that's irrelevant. It just means that there are more
applications around that have to be dealt with when you update.

> 2. The current compilation scheme (compiling to bytecode as and when
> it is needed) works well for scripting purposes but is less desirable
> in commercial settings. Less distribution happens when it is used
> purely for scripting purposes, such as system maintenance or tuning.

The solution with the current situation depends on what you mean by
"commercial settings".

> 3. Using Python in commercial settings will usually require
> distribution of resulting software and it is may or may not be
> desirable to distribute source codes as well. Unless the application
> is frozen, distributing source code is a must.

People have recommended that you distribute the Python interpreter
with commercial applications. This makes installing them much easier
for the end user. It also means the byte code and the interpreter will
always match.

> 4. One advantage that Java platform has is that it does not require
> the release of source files and still promotes platform-independence.

Java is only "platform-independent" to the degree that the jvm and
libraries you need for your application are already available.  A
quick google finds applications that require jvm versions - so I
suspect that you can't always run Java code built for a new version of
the jvm on older jvms. So you have to make sure the target platform
has a recent enough implementation of the jvm installed. You may have
problems if you try using a different groups jvm as well. I haven't
looked into that in a number of years.

So you can't just ship java bytecodes to someone expecting they'll be
able to run it out of the box. They may well need to update their java
environment, or install a second one (I recall one time having four
Java products that took in total three different jvms to run. Bleah.)

This isn't really different from Python. In both cases, the end user
has to have a suitable version of the bytecode interpreter and
libraries installed. Java is a little better in that they provide
backwards compatability.

> 5. Unstable bytecodes makes updating to a newer version of Python very
> tedious and risk breaking old scripts, if they uses C modules.

Unstable bytecodes have nothing to do with these problems. 

The current CPython installation process puts the python command and
the libraries for different versions in different directories. This
allows you to have multiple versions installed so you can keep old
scripts working with the old version until you've had time to test
them. It also makes life much easier on the developers, as they can
have a development version installed on the machine at the same time
as they have a production version without breaking the old scripts. It
also means you have to reinstall all your modules on the new
installation - which is what makes the update process tedious for me.

Now, this could be mitigated by having Python libraries installed in
the same location for all versions. You could fix all the bytecode
files by running compileall.py as a script. Sometimes, a module won't
work properly on a new version of Python, and will have to be
updated. You'll have to find those by trial and error and fix them as
you find them. You'll also have to recompile all the C modules, which
will break running scripts on the old interpreter.

Under the currewnt system, old scripts that are run by the new
interpreter will break if all the modules they need aren't installed
yet. Once they're installed, the scripts should work.

If you have scripts that use C modules that aren't installed in the
standard Python search path, they may well break on the new
interpreter until you recompile them. Having both versions of the
interpreter available makes this tolerable.

The cure I proposed seems worse than disease. If you've got a better
solution, I'm sure we'd be interested in hearing it.

> 6. Unstable bytecodes also makes research work into Python, such as,
> just-in-time compilation and just-in-time specialization unfavourable
> as they may only be applicable to a specific version of Python. There
> is much less chance of getting a project grant than if the same
> project is applied for Java (stable bytecodes).

This doesn't seem to have stopped the Psyco project from turning out a
jit compiler. I can't speak to grant applications, though. If you're
really interested, you could apply to the PSF for a grant.

> I may be chopped by saying this but by having a stable set of
> bytecodes, we may lose a means of optimization. But we may gain more
> from filling the need for commerical distribution of applications
> writing in Python and ease of upgrading...

The commercial distribution needs can be met without going to stable
bytecodes. The ease of upgrading needs aren't met by going to stable
bytecodes.

> At current stage, every time a new version of Python is installed in
> my server or system, I have to test and ensure the needed libraries
> are there... which may be a horror in corporate settings. Couple that
> with messy dependencies of the libraries to be installed. I remembered
> the time I was trying to install Eric 3, the dependencies makes me
> want to give up... I have to install Qt, then pyQt, then something
> else, then Eric3. Imagine you need 10 of those libraries... which may
> happen... I am not yet masochistic enough to take pleasures in this...

Fixing the byte-code problem won't help with the dependency
problem. If anything, it'll make it worse, because you'll have old
libraries that were installed with previous versions of Python to
contend with. If those are acceptable, that's all well and good. But
for complex packages like eric - which depends on sip and qt and a
number of other things - the latest versions tend to rely on having
up-to-date libraries. So you install eric, and watch it fail because
some library is out of date. Update that library and repeat. The
easiest way to deal with this is to find all the libraries it needs,
and just update them all.

The dependencies problem is actually pretty easy to solve. In fact, in
many Python environments, it's already solved. On my system, if I
install Eric3 using the provided installation package, the
dependencies will be picked up automatically. Not very helpfull if
you're not on such a system, I know. The long-term solution is for
PyPI to grow to include this functionality.

     Thank you,
     <mike

-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From newsgroups at jhrothjr.com  Sun Apr 17 12:25:45 2005
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 17 Apr 2005 11:25:45 -0500
Subject: module to parse "pseudo natural" language?
References: <d3thql$4rh$1@news.hispeed.ch>
Message-ID: <11653jaoeteid97@news.supernews.com>

"Andrew E" <andrew at nospam.com> wrote in message 
news:d3thql$4rh$1 at news.hispeed.ch...
> Hi all
>
> I've written a python program that adds orders into our order routing
> simulation system. It works well, and has a syntax along these lines:
>
>  ./neworder --instrument NOKIA --size 23 --price MARKET --repeats 20
>
> etc
>
> However, I'd like to add a mode that will handle, say:
>
>  ./neworder buy 23 NOKIA at MKT x 20
>
> I could enter several orders either by running multiple times, or use a
> comma-separated approach, like:
>
>  ./neworder buy 23 NOKIA at MKT on helsinki, sell 20 NOKIA at market on
> helsinki
>
> The thing about this is that its a "tolerant" parser, so all of these
> should also work:
>
>  # omit words like "at", "on"
>  ./neworder buy 23 NOKIA mkt helsinki
>
>  # take any symbol for helsinki
>  ./neworder buy 23 mkt helsinki
>
>  # figure out that market=helsinki
>  ./neworder buy 23 NOKIA at market price
>
>
> I've started writing a simple state-based parser, usage like:
>
>  class NaturalLanguageInsructionBuilder:
>
>    def parse( self, arglist ):
>      """Given a sequence of args, return an Instruction object"""
>      ...
>      return Instruction( instrument, size, price, ... )
>
>
>  class Instruction:
>    """encapsulate a single instruction to buy, sell, etc"""
>
>    def __init__( self, instrument, size, price, ... ):
>      ...
>
>
> This doesn't work yet, but I know with time I'll get there.
>
> Question is - is there a module out there that will already handle this
> approach?
>
> Thanks for any suggestions :)

There's NLTK (on Sourceforge) which has already been  mentioned.
However, it's a teaching tool, not a real production natural language
parser.

I'd suggest you step back from the problem and take a wider
view. Parsing natural language, in all its variations, is an unsolved
research problem that is part of what has given Artificial Intelligence
somewhat of a black eye.

Your problem is, however, much simpler than the general one:
you've got a limited number of commands which pretty much
all follow the VO (verb operands) pattern.

You've also got a lot of words from limited and disjunct
vocabularies that can be used to drive the parse. In your example,
at least one of 'buy' and 'sell' is required to start a clause,
MKT is one of maybe a half dozen
qualifiers that specify other information that must be present,
there are a limited number of exchanges, and the number of
shares seems to be the only number present.

I'd also take a bit of advice from the XP community: don't
write the library first, wait until you've got at least three
working examples so you know the services that the
library really needs to support.

John Roth
>
> Andrew 



From andy at reportlab.com  Thu Apr 14 11:13:16 2005
From: andy at reportlab.com (andy at reportlab.com)
Date: Thu, 14 Apr 2005 08:13:16 -0700
Subject: Nokia to speak at Python-UK next week
Message-ID: <andyrobinson-0DCE6A62FIOkbvTkJzLFypp0ig12V/j@mailblocks.com>

I am please to announce that Tapio Tallgren of Nokia Research
Labs is coming to Python-UK to talk about Python on the Nokia Series
60 phones.  If you want to get hands-on, upgrade that handset now!

This is a late addition to an already star-studded programme including
Greg Stein of Google, and many other key Python speakers and
projects.

Python-UK is part of the ACCU conference, Randolph Hotel,
Oxford, 21-23 April  (i.e. Thursday to Saturday next week).
There's still time to sign up and attend the event, in its entirety
or on a day by day basis!

   http://www.accu.org/conference/python.html


Best Regards,


Andy Robinson
Python-UK conference chair




From host at host.com  Thu Apr 14 04:03:20 2005
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From mrovner at propel.com  Wed Apr  6 16:15:43 2005
From: mrovner at propel.com (Mike Rovner)
Date: Wed, 06 Apr 2005 13:15:43 -0700
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <1112816991.860177.68420@l41g2000cwc.googlegroups.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
Message-ID: <d31fti$1io$1@sea.gmane.org>

ritterhaus at yahoo.com wrote:
> Nope. Does't work. Running Python 2.3.4 on Debian, Linux kernel 2.6.
> This is actually test code for a larger project...
> 
> # flash the selected wx.TextControl
> 
> for flasher in range(4):
>     self.textField.SetBackgroundColour(255, 0, 0)
       self.textField.Update()
>     time.sleep(0.8)
>     self.textField.SetBackgroundColour(255, 255, 223)
       self.textField.Update()
>     time.sleep(0.8)
> 
> Even when I add an explicit call to repaint the TextCtrl between each
> sleep, things appear to be 'queued' until after the loop is fnished.
> Very bizarre.

If you use .Refresh() request still queued.

/m



From jdc at uwo.ca  Sun Apr 17 21:50:28 2005
From: jdc at uwo.ca (Dan Christensen)
Date: Sun, 17 Apr 2005 21:50:28 -0400
Subject: ANN: Veusz 0.5 - a scientific plotting package
In-Reply-To: <mailman.2027.1113746240.1799.python-announce-list@python.org>
References: <mailman.2027.1113746240.1799.python-announce-list@python.org>
Message-ID: <87br8chmzf.fsf@uwo.ca>

Jeremy Sanders <jeremysanders at gmail.com> writes:

> Veusz 0.5
> ---------
> Velvet Ember Under Sky Zenith
> -----------------------------
> http://home.gna.org/veusz/
>
> Veusz is a scientific plotting package written in Python (currently
> 100% Python). It uses PyQt for display and user-interfaces, and
> numarray for handling the numeric data. Veusz is designed to produce
> publication-ready Postscript output.

Just curious how veusz compares to other python plotting libraries,
such as matplotlib...

Dan


From __peter__ at web.de  Tue Apr 26 07:36:05 2005
From: __peter__ at web.de (Peter Otten)
Date: Tue, 26 Apr 2005 13:36:05 +0200
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
	<pan.2005.04.26.10.16.56.488032@yahoo.com>
Message-ID: <d4l92e$9di$05$1@news.t-online.com>

Dumbkiwi wrote:

>> Just encode the data in the target encoding before passing it to
>> os.popen():
>> 
>> test = os.popen('kdialog --inputbox %s' % data.encode("utf-8"))
 
> I had tried that, but then the text looks like crap.  The text I'm using
> for this is Polish, and there are a lot of non-English characters in
> there. Using this method results in some strange characters - basically it
> looks like a file encoded in utf-8, but displayed using iso-8859-1.
> 
> Is this the best I can do?

I've just tried the setup you described (with German umlauts instead of
Polish characters) on my Suse 9.1, and it works as expected with both
Python 2.3 and 2.4. Perhaps the target encoding you need is not UTF-8. I
would try other popular encodings used for Polish text (no idea what these
are). sys.stdout.encoding might give you a clue.

Peter


From skip at pobox.com  Thu Apr 14 16:42:42 2005
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 14 Apr 2005 15:42:42 -0500
Subject: SimpleXMLRPCServer - disable output
In-Reply-To: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>
References: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>
Message-ID: <16990.54722.516111.171795@montanaro.dyndns.org>


    codecraig> I thought I posted this, but its been about 10min and hasnt
    codecraig> shown up on the group.

Patience...

    codecraig> localhost - - [14/Apr/2005 16:06:28] "POST /RPC2 HTTP/1.0" 200 -

    codecraig> Anyhow, is there a way I can surpress that so its not printed
    codecraig> to the console? I looked at SimpleXMLRPCServer.py ...it
    codecraig> doesn't explicitly print that, I think perhaps std is...but
    codecraig> not sure.  Any ideas??

Introspection is your friend:

    >>> import SimpleXMLRPCServer
    >>> for a in dir(SimpleXMLRPCServer):
    ...   matches = [m for m in dir(getattr(SimpleXMLRPCServer, a))
    ...                if m.find("log") != -1]
    ...   if matches:
    ...     print "***", a, "***"
    ...     print matches
    ... 
    *** SimpleXMLRPCRequestHandler ***
    ['log_date_time_string', 'log_error', 'log_message', 'log_request']
    *** os ***
    ['getlogin']

Skip


From kent37 at tds.net  Sat Apr 16 11:54:40 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 16 Apr 2005 11:54:40 -0400
Subject: No subject
In-Reply-To: <mailman.2000.1113662565.1799.python-list@python.org>
References: <mailman.2000.1113662565.1799.python-list@python.org>
Message-ID: <42613111$1_1@newspeer2.tds.net>

Michael.Coll-Barth at VerizonWireless.com wrote:
> All,
> 
> I have been going through the manuals and not having much luck with the
> following code.  This is basically an issue of giving 'split' multiple
> patterns to split a string.  If it had an ignore case switch, the problem
> would be solved.  Instead, I have to code the following, which works fine
> for a single byte string.  What can I do when I want to look for strings?

Use re.split() instead of str.split(). It uses any regex as the split string:
  >>> import re
  >>> test = 'A big Fat CAt'
  >>> re.split('[aA]', test)
['', ' big F', 't C', 't']

Kent

>>>>test = 'A big Fat CAt'
>>>>A = test.split('A')
>>>>print A
> 
> ['', ' big Fat C', 't']
> 
>>>>a = []
>>>>for x in xrange(len(A)):
> 
> ...     tmp = A[x].split('a')
> ...     for y in xrange(len(tmp)):
> ...         a.append(tmp[y])
> ...
> 
>>>>a
> 
> ['', ' big F', 't C', 't']


From littlejohn.75 at news.free.fr  Wed Apr 13 12:36:18 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 13 Apr 2005 16:36:18 GMT
Subject: preallocate list
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j5t4$nqg$1@scotsman.ed.ac.uk>
	<d3j569$5tr$1@solaris.cc.vt.edu> <op.so6ehvehpda12i@localhost>
	<d3jes1$onj$1@scotsman.ed.ac.uk>
Message-ID: <425d4a82$0$10793$626a14ce@news.free.fr>

Le Wed, 13 Apr 2005 16:46:53 +0100, Jim a ?crit :
> 
> What I really want is a Numeric array but I don't think Numeric supports 
> importing files.
Numeric arrays can be serialized from/to files through pickles :
import Numeric as N
help(N.load)
help(N.dump)
(and it is space efficient)
> 
> Jim


From codecraig at gmail.com  Thu Apr 14 13:56:25 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 10:56:25 -0700
Subject: distribute python script
Message-ID: <1113501385.376681.148340@o13g2000cwo.googlegroups.com>

i want to distribute my python script as an executable.  I have tried
py2exe but it caused a problem in my script when I ran it.  I know
about Gordon McMillans Installer (which is no longer hosted)..but i
tried that and when i run the .exe it generated, it just crashes (i.e.
Windows wants to send an error report).  Pyco is gone as well.

anyone?



From andrea_gavana at tin.it  Sat Apr  2 07:28:13 2005
From: andrea_gavana at tin.it (andrea_gavana at tin.it)
Date: Sat, 2 Apr 2005 14:28:13 +0200
Subject: How To Do It Faster?!?
Message-ID: <42000634000203C7@ims9c.cp.tin.it>

Hello Simo & NG,

>Correct me if I'm wrong but since it _seems_ that the listing doesn't
>need to be up-to-date each minute/hour as the users will be looking
>primarily for old/unused files, why not have a daily cronjob on the
>Unix server to produce an appropriate file list on e.g. the root
>directory of your file server?

You are correct. I don't need this list to be updated every minute/hour.

>$ find . -type f -printf "%T@ %u %s %p\n" > /yourserverroot/files.txt

That is a nice idea. I don't know very much about Unix, but I suppose that
on a ksh I can run this command (or a similar one) in order to obtain the
list I need. If anyone knows if that command will run also on a simple ksh,
could please confirm that?

Moreover, I could run this script in a while loop, like:

while 1:
do

    if -e [/yourserverroot/filesbackup.txt];
    then
        find . -type f -printf "%T@ %u %s %p\n" > /yourserverroot/files.txt
        copy /yourserverroot/files.txt   /yourserverroot/filesbackup.txt
    else
        find . -type f -printf "%T@ %u %s %p\n" > /yourserverroot/filesbackup.txt
    fi

done

or something similar (I don't have Unix at hand now, I can not test the
commands and, as I said, I don't know Unix very well...). In this way, I
always have the filesbackup.txt up-to-date, as a function of the "find"
speed on the server.
Then my GUI could scan the filesbackup.txt file and search for a particular
user information. 

Thanks to all the NG for your suggestions!

Andrea.



From rkoida at yahoo.com  Wed Apr 20 02:38:25 2005
From: rkoida at yahoo.com (rkoida at yahoo.com)
Date: 19 Apr 2005 23:38:25 -0700
Subject: How to Convert a makefile to Python Script
In-Reply-To: <4265db87.28722550@news.oz.net>
References: <1113968971.081613.140640@l41g2000cwc.googlegroups.com>
	<4265db87.28722550@news.oz.net>
Message-ID: <1113979105.382157.228910@z14g2000cwz.googlegroups.com>

Thanks For Your Help

Regards
rkoida



From tiissa at nonfree.fr  Sat Apr 16 12:28:09 2005
From: tiissa at nonfree.fr (tiissa)
Date: Sat, 16 Apr 2005 18:28:09 +0200
Subject: No subject
In-Reply-To: <mailman.2000.1113662565.1799.python-list@python.org>
References: <mailman.2000.1113662565.1799.python-list@python.org>
Message-ID: <42613d15$0$11250$636a15ce@news.free.fr>

Michael.Coll-Barth at VerizonWireless.com wrote:
> I have been going through the manuals and not having much luck with the
> following code.  This is basically an issue of giving 'split' multiple
> patterns to split a string.  If it had an ignore case switch, the problem
> would be solved.  Instead, I have to code the following, which works fine
> for a single byte string.  What can I do when I want to look for strings?
As far as I know there is no such switch.
If you can't convert your string in, say, lowercase, before splitting, 
you may have to use the re module:

In [1]: test = 'A big Fat CAt'

In [2]: import re

In [3]: A=re.compile('a', re.IGNORECASE)

In [4]: A.split(test)
Out[4]: ['', ' big F', 't C', 't']


>>>>test = 'A big Fat CAt'
>>>>A = test.split('A')
>>>>print A
> ['', ' big Fat C', 't']
>>>>a = []
>>>>for x in xrange(len(A)):
> ...     tmp = A[x].split('a')
> ...     for y in xrange(len(tmp)):
> ...         a.append(tmp[y])
> ...
>>>>a
> ['', ' big F', 't C', 't']
As a side note, reduce is great in such situations:

In [5]: reduce(list.__add__,[t.split('a') for t in test.split('A')],[])
Out[5]: ['', ' big F', 't C', 't']


From mauriceling at acm.org  Fri Apr 15 01:01:09 2005
From: mauriceling at acm.org (Maurice LING)
Date: Fri, 15 Apr 2005 15:01:09 +1000
Subject: RE Engine error with sub()
Message-ID: <d3nhqk$dlo$1@domitilla.aioe.org>

Hi,

I have the following codes:

from __future__ import nested_scopes
import re
from UserDict import UserDict


class Replacer(UserDict):
     """
     An all-in-one multiple string substitution class. This class was 
contributed by Xavier
     Defrang to the ASPN Python Cookbook 
(http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81330)
     and alane at sourceforge.net.

     Copyright: The methods _make_regex(), __call__() and substitute() 
were the work of Xavier Defrang,
     __init__() was the work of alane at sourceforge.net, all others were 
the work of Maurice Ling"""

     def __init__(self, dict = None, file = None):
         """Constructor. It calls for the compilation of regular 
expressions from either
         a dictionary object or a replacement rule file.

         @param dict: dictionary object containing replacement rules 
with the string to be
                         replaced as keys.
         @param file: file name of replacement rule file
         """
         self.re = None
         self.regex = None
         if file == None:
             UserDict.__init__(self, dict)
             self._make_regex()
         else:
             UserDict.__init__(self, self.readDictionaryFile(file))
             self._make_regex()

     def cleanDictionaryFile(self, file):
         """
         Method to clean up the replacement rule dictionary file and 
write the cleaned
         file as the same name as the original file."""
         import os
         dict = self.readDictionaryFile(file)
         f = open(file, 'w')
         for key in dict.keys(): f.write(str(key) + '=' + str(dict[key]) 
+ os.linesep)
         f.close()

     def readDictionaryFile(self, file):
         """
         Method to parse a replacement rule file (file) into a 
dictionary for regular
         expression processing. Each rule in the rule file is in the form:
             <string to be replaced>=<string to replace with>
             """
         import string
         import os
         f = open(file, 'r')
         data = f.readlines()
         f.close()
         dict = {}
         for rule in data:
             rule = rule.split('=')
             if rule[1][-1] == os.linesep: rule[1] = rule[1][:-1]
             dict[str(rule[0])] = str(rule[1])
         print '%s replacement rule(s) read from %s' % 
(str(len(dict.keys())), str(file))
         return dict

     def _make_regex(self):
         """ Build a regular expression object based on the keys of the 
current dictionary """
         self.re = "(%s)" % "|".join(map(re.escape, self.keys()))
         self.regex = re.compile(self.re)

     def __call__(self, mo):
         """ This handler will be invoked for each regex match """
	    # Count substitutions
         self.count += 1 # Look-up string
         return self[mo.string[mo.start():mo.end()]]

     def substitute(self, text):
         """ Translate text, returns the modified text. """
         # Reset substitution counter
         self.count = 0
         # Process text
         #return self._make_regex().sub(self, text)
         return self.regex.sub(self, text)

     def rmBracketDuplicate(self, text):
         """Removes the bracketed text in occurrences of '<text-x> 
(<text-x>)'"""
         regex = re.compile(r'(\w+)\s*(\(\1\))')
         return regex.sub(r'\1', text)

     def substituteMultiple(self, text):
         """Similar to substitute() method except that this method loops 
round the same text
         multiple times until no more substitutions can be made or when 
it had looped
         10 times. This is to pre-ampt for cases of recursive 
abbreviations."""
         count = 1 # to get into the loop
         run = 0 # counter for number of runs thru the text
         while count > 0 and run < 10:
             count = 0
             text = self.rmBracketDuplicate(self.substitute(text))
             count = count + self.count
             run = run + 1
             print "Pass %d: Changed %d things(s)" % (run, count)
         return text




Normally I will use the following to instantiate my module:

replace = Replacer('', 'rule.mdf')

rule.mdf is in the format of "<string to be replaced>=<string to replace 
with>\n"

Then using replace.substituteMultiple('<my text>') to carry out multiple 
replacements.

It all works well for rule count up to 800+ but when my replacement 
rules swells up to 1800+, it gives me a runtime error that says 
"Internal error in regular expression engine"... traceable to "return 
self.regex.sub(self, text)" in substitute() method.


Any ideas or workarounds?

Thanks in advance.

Cheers,
Maurice


From jalil at feghhi.com  Tue Apr 19 14:11:31 2005
From: jalil at feghhi.com (jalil at feghhi.com)
Date: 19 Apr 2005 11:11:31 -0700
Subject: Encoding Questions
Message-ID: <1113934291.419258.314390@o13g2000cwo.googlegroups.com>

1. I download a page in python using urllib and now want to convert and
keep it as utf-8? I already know the original encoding of the page.
What calls should I make to convert the encoding of the page to utf8?
For example, let's say the page is encoded in gb2312 (simple chinese)
and I want to keep it in utf-8?

2. Is this a good approach? Can I keep any pages in any languages in
this way and return them when requested using utf-8 encoding?

3. Does python 2.4 support all encodings?

By the way, I have set my default encoding in Python to utf8.

I appreciate any help.

-JF



From listserver at tdw.net  Tue Apr 12 12:20:07 2005
From: listserver at tdw.net (Tim Williams)
Date: Tue, 12 Apr 2005 17:20:07 +0100
Subject: smtplib STARTTLS problems
Message-ID: <002701c53f7b$7de45350$5aeda8c0@twilliams>

I have a working SMTP client that I need to add TLS capability to,    I
absolutely need the client to timeout within a specified time,  but when I
use the sock.timeout() line it freezes the reading of chars from SSLFakeFile
used during TLS  instead of timing out the client connection.    I am
working from my own hacked version of smtplib,  but can demonstrate the
problem using the standard module (Python 2.3.4).   Can anyone suggest a
workaround hack that I can impliment in my own version of smtplib ??

Thanks in advance

Working version =

import smtplib as mx
s=mx.SMTP('e32.co.us.ibm.com')
s.set_debuglevel(1)
s.ehlo('x')
resp, null =  s.starttls()
if resp == 220:
    s.ehlo('x')
s.mail('me at mydomain.com')
s.quit()



Non-Working version =

import smtplib as mx
s=mx.SMTP('e32.co.us.ibm.com')
s.sock.settimeout(20)
s.set_debuglevel(1)
s.ehlo('x')
resp, null =  s.starttls()
if resp == 220:
    s.ehlo('x')
s.mail('me at mydomain.com')
s.quit()

Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "tls2.py", line 8, in ?
    print s.ehlo('x')
  File "C:\Python23\lib\smtplib.py", line 404, in ehlo
    (code,msg)=self.getreply()
  File "C:\Python23\lib\smtplib.py", line 356, in getreply
    line = self.file.readline()
  File "C:\Python23\lib\smtplib.py", line 160, in readline
    chr = self.sslobj.read(1)
sslerror: The read operation timed out





From jepler at unpythonic.net  Fri Apr 22 15:41:02 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Fri, 22 Apr 2005 14:41:02 -0500
Subject: How to prevent Tkinter frame resize?
In-Reply-To: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
References: <1114139979.992625.282610@l41g2000cwc.googlegroups.com>
Message-ID: <20050422194100.GG9831@unpythonic.net>

Use the wm_resizable method of the toplevel widget.
>>> from Tkinter import *; t = Tk(); t.wm_resizable(0,0); t.mainloop()

Jeff
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From enjoy_linux at hotmail.com  Wed Apr 13 07:41:25 2005
From: enjoy_linux at hotmail.com (MaHahaXixi)
Date: Wed, 13 Apr 2005 19:41:25 +0800
Subject: how to explain such codes, python's bug or mine?
References: <d3iqhe$1s0l$1@mail.cn99.com>
	<1113386913.961445.165950@z14g2000cwz.googlegroups.com>
Message-ID: <d3j0pf$1tjo$1@mail.cn99.com>

yes. i think it does so.
it take me the whole afternoon to find out the bug (mine)
i change:
for i  in range(len(j) -1, -1, -1):
   d = j[i]
   if d <= 10:
        j.remove(d)

the real code is not so simple,so j[11:] will not work for me.
but, i think phthon could found that i remove the current element,  why it
does not move the pointer automatically?
for python, i am a newbie, but i did not found the warning of such usage
from the python tutorial

<ajikoe at gmail.com> wrote in message
news:1113386913.961445.165950 at z14g2000cwz.googlegroups.com...
> Hi,
>
> it is not python bug.
> You refer the list j and remove the element in the same time, that is
> the problem. Python dinamicaly goes to the next element with the same
> index but apply it in the new list.
>
> use this code instead:
>   j = range(20)
>   print j
>   L = [x for x in j if x > 10]
>   print L
>
> Sincerely Yours,
> Pujo
>




From radam2 at tampabay.rr.com  Fri Apr  1 03:57:45 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Fri, 01 Apr 2005 08:57:45 GMT
Subject: dictionary: sorting the values preserving the order
References: <1112337653.401206.160510@l41g2000cwc.googlegroups.com>
Message-ID: <h02q41lbt3mijo9s49g9vh4fhcvd964jam@4ax.com>

On 31 Mar 2005 22:40:53 -0800, "Rakesh" <rakesh_usenet at yahoo.com>
wrote:

>Hi,
>  For a particular problem of mine, I want to sort <key, value> pairs
>by its value.
>
>Eg:
>
>Input:
>
>A, 4
>B, 5
>C, 1
>D, 2
>E, 3
>
>I would like the output to be:
>
>C
>D
>E
>A
>B
>
>i.e. I would like to get the keys in the sorted order of values.

Generally, dictionaries nearly always have two parts. The dictionary
itself, and a separate list of keys to access it with.  

To access the dictionary in a particular order, you just need a sorted
key list.

Since what you want is to access by value, you need to create a second
dictionary with the values as the keys.  That will only work if the
values never repeat. If they do, then you need to use a list and not a
dictionary.

This creates a second dictionary with a sorted value key list.

alpha_dict = {'A':4, 'B':5, 'C':1, 'D':2, 'E':3}

# Create a new dictionary with keys and values exchanged.
num_dict = {}
for k in alpha_dict.keys():
    num_dict[ alpha_dict[k] ] = k

# Get the num_dict keys and sort them.
num_keys = num_dict.keys()
num_keys.sort()


Ron



From dirgesh at gmail.com  Thu Apr 14 16:50:56 2005
From: dirgesh at gmail.com (GujuBoy)
Date: 14 Apr 2005 13:50:56 -0700
Subject: changing colors in python
Message-ID: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>

i have a ansi.py file that i use in LINUX to change the text color to
STDOUT when i use the "print" function...but when i move this ansi.py
file over the windows...it does not work

is there a version of ansi.py i can use for windows/linux....

please help



From franz.steinhaeusler at utanet.at  Wed Apr 27 10:21:23 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Wed, 27 Apr 2005 16:21:23 +0200
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
Message-ID: <9f7v619jhigbtoksslnr88f4idoc6ejvu3@4ax.com>

On Wed, 27 Apr 2005 21:16:29 +0800, "monkey" <m at m.com> wrote:

>Read through python site for programming tool, really plenty of choices :-)
>(For c++, I just can't breath with very very limited choices)
>
>Tried Spe, it come with wxGlade built-in very nice(is Spe still actively
>develop?). 

Hello,

I think, it is.
But SciTE is also nice (you can start Python Programs with F5, IIRC, and
you see the output of your program).


>But seem that Boa Constructor and PyDev(the plug-in for Eclipse)
>also worth looking. Actually which one are you guys using? and why? I think
>it is also valuable for those who are new to python as me.
>
>

But I personally recommend DrPython. (Not only, I'm a member of the
project).

It is very customizable (Keyboard Shortcuts, customizable right-mouse
popup menu, Syntax Check, you can define your own scripts or macros and
you can extend it with plugins, as there are several available).

(Find/Replace in Files, Sessions, Code Completition, Document List,
Position Marker, Autocomplete, Incremental Search, Abbreviations

You can open several Python prompts in the editor and start your
currently typed program and view the output.
It is written in wxPython, open source and under development.

I use it for all my Python typing and development.


-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From beliavsky at aol.com  Thu Apr 21 08:55:39 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 21 Apr 2005 05:55:39 -0700
Subject: Define Constants
References: <1114028999.275836.37290@z14g2000cwz.googlegroups.com>
Message-ID: <1114088139.518862.105520@g14g2000cwa.googlegroups.com>

A "recipe" for "Constants in Python" by Alex Martelli is at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65207 .



From rkern at ucsd.edu  Sun Apr 10 23:18:09 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 10 Apr 2005 20:18:09 -0700
Subject: Thoughts on some stdlib modules
In-Reply-To: <200504102212.19392.hancock@anansispaceworks.com>
References: <mailman.1524.1112951803.1799.python-list@python.org>	<425999BD.7050308@v.loewis.de>
	<d3c88t$r27$1@sea.gmane.org>
	<200504102212.19392.hancock@anansispaceworks.com>
Message-ID: <d3cq4b$t9u$1@sea.gmane.org>

Terry Hancock wrote:
> On Sunday 10 April 2005 05:14 pm, Fredrik Lundh wrote:
> 
>>I'm not talking about things that absolutely have to be in the Python
>>interpreter core; I'm talking about things that *could* be bundled
>>with the standard distribution, *without* having to be relicensed,
>>or be forever maintained by the CPython developers.
>>
>>(the Linux distributors know how to do this: look for good stuff that's
>>either actively maintained or simple and solid enough to live for a while,
>>make sure the licenses are good enough, bundle the latest and greatest
>>version, ship tested versions at regular intervals, update when necessary,
>>and pass bugs and patches upstream.  why not use the same approach
>>for Python's standard distribution?)
> 
> 
> That sounds like a suggestion that there should be a "greater python"
> distribution --- python itself, the standard libraries (now released together
> as the "python distribution"), and the most commonly used Python
> packages (which presumeably would include the current free PIL, Numeric (or
> Numarray more likely), and so on.
> 
> One might argue that Linux distributions are already doing this -- Debian
> does something like it, for example.  But there would be a greater cross-
> platform consistency if such a super-distribution existed.  I can imagine
> it would be particularly valuable to Windows users who can't benefit from
> the Linux packaging operations.
> 
> I guess the other thing to compare to is something like SciPy, which is
> a kind of specialized distribution of Python for scientific applications.

No, Scipy is just a (large) package. Enthon, on the other hand, is just 
such a distribution.

Windows:
http://www.enthought.com/downloads/downloads.htm
(go to the bottom for the latest and greatest)

Mac:
http://download.enthought.com/MacEnthon/ReadMe.html
http://download.enthought.com/MacEnthon/MacEnthon-0.1.dmg

Linux:
TBA

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From peufeu at free.fr  Mon Apr 11 09:30:17 2005
From: peufeu at free.fr (=?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?=)
Date: Mon, 11 Apr 2005 15:30:17 +0200
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<Xns96359D512AF1APaCmAnRDLM@212.27.42.73>
Message-ID: <op.so2k4r1vqfv3if@localhost>


If you want Simple you can use the following piece of code.
It won't work if you have a million records, but it's a nice intelligent  
flatfile storage with a select where + order by and limit emulator.

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

class ListMgr( object ):
	def __init__( self, klass, filename ):
		self.filename = filename
		self.klass = klass
		self.load()

	def load( self ):
		try:
			self.contents = pickle.load( open( self.filename ))
			print "Loaded %d items %s in %s" % (len(self.contents), self.klass,  
type(self))
		except IOError:
			print "Creating new contents for", type(self)
			self.contents = {}
			self.save()

		if self.contents:
			self.insert_id = max( self.contents.keys() ) +1
		else:
			self.insert_id = 1

	def save( self ):
		pickle.dump( self.contents, open( self.filename+'.tmp', 'w' ) )
		os.rename( self.filename+'.tmp', self.filename )
		print "Saved %d items %s in %s" % (len(self.contents), self.klass,  
type(self))

	def new( self, **params ):
		return self.klass( **params )

	def insert( self, obj ):
		assert not hasattr( obj, 'id' ) or obj.id is None
		obj.id = self.insert_id
		self.insert_id += 1
		self.contents[obj.id] = obj

	def update( self, obj ):
		assert obj.id is not None
		self.contents[obj.id] = obj

	def select( self, id ):
		return self.contents[ id ]

	def delete( self, id ):
		del self.contents[ id ]

	def count( self ):
		return len( self.contents )

	# where is a lambda function, order_by is a cmp function, limit is a slice
	def select_multiple( self, where=None, order_by=None ):
		if where:
			c = filter( where, self.contents.itervalues() )
		else:
			c = self.contents.values()
		if order_by:
			c.sort( order_by )
		return c

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

class ListEntry( object ):
	def __init__( self, **params ):
		self.__dict__ = dict.fromkeys( self.get_fields() )
		self.__dict__.update( params )

	def get_fields( self ):
		return ()

	def display( self ):
		print '-'*40
		if hasattr( self, 'id' ):
			print "id	:",self.id
		for k in self.get_fields():
			print k,"	:",getattr(self,k)
		print

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

class AddressBookEntry( ListEntry ):
	def get_fields( self ):
		return 'name', 'address', 'zipcode', 'city', 'country', 'phone'
	get_fields = classmethod( get_fields )

class AddressBook( ListMgr ):
	def __init__( self, fname ):
		super( AddressBook, self ).__init__( AddressBookEntry, fname )





From simon.brunning at gmail.com  Fri Apr 29 07:24:30 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Fri, 29 Apr 2005 12:24:30 +0100
Subject: Can .py be complied?
In-Reply-To: <1114696910.862093.100690@z14g2000cwz.googlegroups.com>
References: <426ec8f7_2@rain.i-cable.com>
	<1114696910.862093.100690@z14g2000cwz.googlegroups.com>
Message-ID: <8c7f10c605042904241a28341c@mail.gmail.com>

On 28 Apr 2005 07:01:50 -0700, beliavsky at aol.com <beliavsky at aol.com> wrote:
> IMO the fact that so many people ask
> 
> "How can I create executables in Python on Windows"
> 
> indicates that standard "batteries included" Windows Python
> distribution is missing a vital battery.

It indicates to *me* that people aren't reading the FAQ. ;-)

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From gerald.maher at waytohere.com  Tue Apr 12 17:21:20 2005
From: gerald.maher at waytohere.com (gerald.maher at waytohere.com)
Date: 12 Apr 2005 14:21:20 -0700
Subject: Missing Module when calling 'Import' _omnipy
In-Reply-To: <425AC803.70704@sympatico.ca>
References: <1113258389.432002.323790@f14g2000cwb.googlegroups.com>
	<425AC803.70704@sympatico.ca>
Message-ID: <1113336595.556003.196620@z14g2000cwz.googlegroups.com>

*_omnipy is Missing*

I have searched my C drive can not find any file called *_omnipy.so or
.dll where do I get it from ?
I found the fike _omnipy.pyd is that what you mean?


Here is my Lib Path:

>>>
['C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\examples\\echoMyTest',
'C:\\WINNT\\system32\\python23.zip', 'C:\\Python23',
'C:\\Python23\\DLLs', 'C:\\Python23\\lib',
'C:\\Python23\\lib\\plat-win', 'C:\\Python23\\lib\\lib-tk',
'C:\\Python23\\Lib\\site-packages\\pythonwin',
'C:\\Python23\\lib\\site-packages',
'C:\\Python23\\lib\\site-packages\\win32',
'C:\\Python23\\lib\\site-packages\\win32\\lib',
'C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\examples\\echoMyTest',
'C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\lib\\python',
'C:\\omniORBpy-2.5-win32-python2.3\\omniORBpy-2.5\\lib\x86_win32',
'C:\\omniORB\\omniORB-4.0.5\\omniORB-4.0.5\\lib\\python\\omniidl',
'C:\\omniORB\\omniORB-4.0.5\\omniORB-4.0.5\\lib\x86_win32']



From jerf at jerf.org  Thu Apr 28 22:44:36 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Thu, 28 Apr 2005 22:44:36 -0400
Subject: How do I parse this ? regexp ? [slighly OT]
References: <1114613771.165548.60030@g14g2000cwa.googlegroups.com>
	<pan.2005.04.27.17.49.30.308584@jerf.org>
	<mailman.1.1114733852.14961.python-list@python.org>
	<tNednb0m1NXEGOzfRVn-gw@powergate.ca>
Message-ID: <pan.2005.04.29.02.44.35.129298@jerf.org>

On Thu, 28 Apr 2005 20:53:14 -0400, Peter Hansen wrote:
> The re docs clearly say this is not the case:
> 
> '''
> []
>      Used to indicate a set of characters. Characters can be listed
> individually, or a range of characters can be indicated by giving two
> characters and separating them by a "-". Special characters are not active
> inside sets.
> '''
> 
> Note the last sentence in the above quotation...
> 
> -Peter

Aren't regexes /fun/?

Also from that passage, Simon, note the "-" right in front of 
[-\[\]0-9,. ], another one that's tripped me up more than once.

Wheeee!

"Some people, when confronted with a problem, think ``I know, I'll use
regular expressions.'' Now they have two problems." - jwz
http://www.jwz.org/hacks/marginal.html



From rdm at rcblue.com  Sun Apr 17 05:23:54 2005
From: rdm at rcblue.com (Dick Moores)
Date: Sun, 17 Apr 2005 02:23:54 -0700
Subject: Compute pi to base 12 using Python?
In-Reply-To: <Vmp8e.66673$Ze5.4755611@phobos.telenet-ops.be>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<7x3btui27t.fsf@ruckus.brouhaha.com>
	<mailman.1868.1113444002.1799.python-list@python.org>
	<1113545886.372148.82420@z14g2000cwz.googlegroups.com>
	<mailman.2016.1113724848.1799.python-list@python.org>
	<Vmp8e.66673$Ze5.4755611@phobos.telenet-ops.be>
Message-ID: <6.2.1.2.2.20050417022125.0970c2a0@rcblue.com>

Roel Schroeven wrote at 01:45 4/17/2005:
>Dick Moores wrote:
>>M.E.Farmer wrote at 23:18 4/14/2005:
>>
>>> > >Using the GNU "bc" utility:
>>> > >
>>> > >   $ bc -l
>>> > >   bc 1.06
>>> > >   Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation,
>>>Inc.
>>> > >   This is free software with ABSOLUTELY NO WARRANTY.
>>> > >   For details type `warranty'.
>>> > >   scale = 3000    # number of output places wanted
>>> > >   obase = 12      # output base
>>> > >   print 4 * a(1)  # pi = 4*arctan(1)
>>
>>Wow! this got me the 3003 (changed from 3000) digits of pi to base 12 
>>in 60.8 secs. No, I didn't count them yet, nor am I sure they're 
>>correct. But I'd bet on them..
>>Could someone remind me how to get the output of bc -l into a text file 
>>on Windows? (I've tried employing " > pi3003.txt" in various ways) OR, 
>>how to copy and paste from the command line window, or whatever that 
>>window is called? (Sorry for the OT question.)
>
>Works for me (using the Cygwin version though) when I do
>
>C:\cygwin\bin\bc -l > pi12.txt

But how or when do you enter the lines

scale = 3000
obase = 12
print 4 * a(1)

>Otherwise, to copy from the command prompt window: open the system menu
>(icon in the top left corner of the window) and choose Edit->Mark. Then
>select what you want to copy and press Enter or choose Edit->Copy in the
>system menu.

Thanks! You've just relieved years of frustration.

Dick 



From jdh2358 at gmail.com  Fri Apr 29 19:14:01 2005
From: jdh2358 at gmail.com (jdh2358 at gmail.com)
Date: 29 Apr 2005 16:14:01 -0700
Subject: Fast plotting?
In-Reply-To: <5Fhce.28061$5f.13056@tornado.tampabay.rr.com>
References: <rowen-608060.09385226042005@gnus01.u.washington.edu>
	<5bbea$42706a5a$d1b714b9$22961@PRIMUS.CA>
	<5Fhce.28061$5f.13056@tornado.tampabay.rr.com>
Message-ID: <1114816441.914714.124600@f14g2000cwb.googlegroups.com>

Are you sure about these numbers?  Most monitors refresh at 70-80Hz, so
unless you have special display hardware, I'm suspicious of these
numbers doubt .  I once had a user post to the matplotlib mailing list
that xplt was refreshing at 1000 Hz.  I think xplt drops plot requests
while requests are in the queue, so many of the loops in his iteration
were simply dropped.  If the plotting library puts draw requests in an
idle event handler, accurate refresh rate numbers can be hard to
quantify.

JDH



From kristian.zoerhoff at gmail.com  Wed Apr 13 12:45:42 2005
From: kristian.zoerhoff at gmail.com (Kristian Zoerhoff)
Date: Wed, 13 Apr 2005 11:45:42 -0500
Subject: Compute pi to base 12 using Python?
In-Reply-To: <d3jg22$hvn$1@panix2.panix.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
	<roy-D9732C.08282913042005@reader1.panix.com>
	<425d3b01$1@nntp0.pdx.net> <d3jg22$hvn$1@panix2.panix.com>
Message-ID: <3511dc75050413094544bcaf8d@mail.gmail.com>

On 13 Apr 2005 12:06:26 -0400, Roy Smith <roy at panix.com> wrote:
> Scott David Daniels  <Scott.Daniels at Acm.Org> wrote:
> >If you think those are fun, try base (1j - 1)
> 
> Get real.  I can't imagine using anything so complex.

+1 QOTW

-- 
Kristian

kristian.zoerhoff(AT)gmail.com
zoerhoff(AT)freeshell.org


From eldiener_no_spam_here at earthlink.net  Fri Apr  8 12:34:30 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Fri, 08 Apr 2005 16:34:30 GMT
Subject: Installing Python 2.4 on Linux
In-Reply-To: <d31anp$16t$1@ctb-nnrp2.saix.net>
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
	<d31anp$16t$1@ctb-nnrp2.saix.net>
Message-ID: <qoy5e.2583$sp3.1483@newsread3.news.atl.earthlink.net>

David Fraser wrote:
> Edward Diener wrote:
> 
>> I can install Python 2.4 on the Fedora 3 Linux system, but after I do 
>> a number of Linux utilities and commands, like yum, stop working 
>> because they were dependent on the Python 2.3 installation. What 
>> happens is that Python 2.4 replaces the /usr/bin/python module with 
>> the Python 2.4 version. If I replace /usr/bin/python with the Python 
>> 2.3 version executable, which is still on my system, that all the 
>> aforesaid modules depend on, they start working again, but I can no 
>> longer execute modules, like IDLE, which was part of my Python 2.4 
>> distribution.
>>
>> What is the solution to this ? The operating system was installed with 
>> Python 2.3 and the development libraries but no tools, doc, or 
>> otherwise. I have installed Python 2.4 with all the RPMs and copied 
>> down the Python 2.4 documentation to my machine ( since 
>> python24-docs.rpm gives one very little ). I would naturally like to 
>> use Python 2.4 without killing all the commands that depend on Python 
>> 2.3. No doubt these commands have their modules in the site libraries 
>> for Python 2.3. Of course I would love to update these dependencies to 
>> use Python 2.4 but newer RPMs for these commands do not exist.
>>
>> I do not know whether this is a Python problem or a Fedora 3 problem 
>> but I thought I would ask here first and see if anybody else had the 
>> same problem. I imagine the problem might exist on other Linux systems.
> 
> 
> Actually the Fedora RPMS supplied on the Python website are fine:
> http://www.python.org/2.4.1/rpms.html
> Quoting from that page:
> 
>> # Q) Is it safe to install these RPMs on a Red Hat system? Will they 
>> over-write the system python and cause problems with other Red Hat 
>> applications that expect a different version of Python?
>> # A) The RPMs that start with "python2.4" are built to not interfere 
>> with the system Python. They install as "/usr/bin/python2.4" and will 
>> not conflict with the system Python unless you are running on a system 
>> that ships the a version of Python which has the same major/minor number.
>>
>> To invoke the interpreter with these packages, you will explicitly 
>> have to run "python2.4". Note that all Python RPMs provided by 
>> Python.org and Red Hat provide a "/usr/bin/python2.4" (or similar, 
>> with major/minor number), even if they also provide "/usr/bin/python". 
>> So, yes, it should be safe.
>>
>> Note that you may need to build and install a second copy of any 
>> packages which you need access to with the supplemental version of 
>> Python. You can build packages of these files for the Python 2.4 
>> interpreters for packages which use Distutils, by using the command 
>> "python2.4 setup.py bdist_rpm". 
> 
> 
> This is by far the preferred way to install a different version of 
> Python to the default version provided with a distribution, as you don't 
> then conflict with packages that require the default version.

I do have a separate package installed for Python2.4 and it coexists 
with Python2.3. The real problem is that a great number of other 
packages, which are initially part of the system, depend on Python2.3 so 
I must leave /usr/bin/python as Python2.3. I do not know of a way to 
reinstall these other packages to use Python2.4 instead. Does the line 
above, "python2.4 setup.py bdist_rpm" mean that I am supposed to run 
this against each of these other package's rpm files and substitute for 
"bdist_rpm" the name of the rpm file ?

> 
> Also, it is better to do it like this using real packages than to rename 
> files manually. I have used the above successfully on Fedora Core 3 (and 
> other similar versions on other distro versions), if it doesn't work for 
> you there is a source RPM available to rebuild from

Is "bdist_rpm" the source rpm for these packages which currently depend 
on Python2.3 ?

Further help getting my Fedora 3 packages which depend on Python2.3 to 
use Python2.4 would be appreciated.


From steve at holdenweb.com  Fri Apr  8 12:31:13 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 12:31:13 -0400
Subject: Interpreter problem
In-Reply-To: <1112973979.536233.278780@l41g2000cwc.googlegroups.com>
References: <425684F8.5060507@novasyshealth.com>	<mailman.1538.1112970334.1799.python-list@python.org>
	<1112973979.536233.278780@l41g2000cwc.googlegroups.com>
Message-ID: <d36bfc$gdl$2@sea.gmane.org>

tuba_ranger wrote:
> Yes!  I moved the file (which I had created on a windows box using a
> mounted drive), created a new one on the Linux box, typed in the
> shabang in Linux, then copied the old file (sans shabang) to the new
> file.  It runs like a champ.  My sysadmin suggests we run all of our
> files through dos2unix before they are moved to production. We both
> imagine that we would have the same problem with our Perl scripts as
> well.
> 
> It's odd that deleting the line and reentering it on the Linux box did
> not correct the problem.  Perhaps vim recognized the format as having
> cr-lf and inserted it even though I was editing on Linux.
> 
> Anyhow, it would have been a long time before I got this one.  Thanks.
> 
A pleasure - just passing on payback for the huge amounts of help I've 
had here myself. See also my post in reply to rbt's latest for remarks 
on other possible fixes using vim.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Sun Apr 17 18:14:08 2005
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Sun, 17 Apr 2005 18:14:08 -0400
Subject: variables exist
References: <9622d535.0504110552.1e070e8d@posting.google.com>
Message-ID: <Michael.J.Fromberger-39BE7B.18140717042005@localhost>

In article <9622d535.0504110552.1e070e8d at posting.google.com>,
 fabian.steels at free.fr (fabian) wrote:

> how testing if a variable exists in python as isset in php??
> 

Would the following be a satisfactory implementation?

  def isset(varname, lloc = locals()):
    return varname in lloc or varname in globals()

I believe this works as desired:

  >>> x = 5
  >>> def f(y):
  ...   z = 10
  ...   print isset('z')   ## ==> True
  ...   print isset('y')   ## ==> True
  ...   print isset('x')   ## ==> True
  ...

Tests:
  >>> f(1)  ## As shown above
  >>> print isset('z')       ## ==> False
  >>> print isset('y')       ## ==> False
  >>> print isset('x')       ## ==> True
  >>> print isset('varname') ## ==> False
  >>> print isset('lloc')    ## ==> False
  >>> lloc = "foo!"
  >>> print isset('lloc')    ## ==> True

Perhaps this is not the most elegant solution, but I believe it handles 
scoping correctly.

-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From kay.schluehr at gmx.net  Sun Apr 17 17:03:23 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 17 Apr 2005 14:03:23 -0700
Subject: re module methods: flags(), pattern()
References: <1113750473.663610.172200@z14g2000cwz.googlegroups.com>
Message-ID: <1113771803.593110.86330@g14g2000cwa.googlegroups.com>

Xah Lee wrote:
> Python re module has methods flags and pattern. How to use these
> exactly?

>From the Python 2.3 documentation, section 2.4.2

flags

The flags argument used when the RE object was compiled, or 0 if no
flags were provided.


groupindex

A dictionary mapping any symbolic group names defined by (?P<id>) to
group numbers. The dictionary is empty if no symbolic groups were used
in the pattern.

pattern

The pattern string from which the RE object was compiled.


Comments derived from the docs and error messages:

> e.g. i tried
>
> print patternObj.flags()
>
> and the error is some "int object is not callable".

=>  flags is an int object

>
> newpattern=re.compile(ur'\w+',patternObj.flags())
>
> also bad.

=> flags is still an int object


> similar error for patternObj.pattern().

=> pattern is a string

> (and i suppose the same for
> groupindex() )

=> groupindex is a dict

>
> thanks.
>
>  Xah
>  xah at xahlee.org
> ? http://xahlee.org/

The documentation is not that bad that one should not read it at all ;)


If You wrestle with regexps I can recommend an old but still usefull
little wrapper I found eventually on the "Vaults of Parnassus" which is
called reverb.py 

Ciao,
Kay



From jjl at pobox.com  Mon Apr  4 17:43:13 2005
From: jjl at pobox.com (John J. Lee)
Date: 04 Apr 2005 21:43:13 +0000
Subject: string goes away
References: <424CCED4.60000@imb-jena.de>
	<16972.46839.309827.574430@montanaro.dyndns.org>
	<mailman.1158.1112324403.1799.python-list@python.org>
	<mailman.1259.1112538073.1799.python-list@python.org>
Message-ID: <87hdim6wwe.fsf@pobox.com>

"Martin v. L?wis" <martin at v.loewis.de> writes:
[...]
> Of course that statement is also false. Performance prediction is very
> difficult, and you cannot imply much from this benchmark. In other
[...]

s/imply/infer/


John


From grante at visi.com  Fri Apr 22 16:26:09 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 20:26:09 -0000
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
Message-ID: <116inf1aivjgd28@corp.supernews.com>

On 2005-04-22, dcrespo <dcrespo at gmail.com> wrote:

> Your solution requires a previous installation of Acrobat.

Probably not.  Most printing systems I'm familiar with use
ghostscript to render PDF into either postscript (the case on
my machines at home) or whatever raster format the printer
desires (the case at my office).

> Internally, the OS is sending the pdf file to the Acrobat PDF
> Driver and then it is sent to the printer.

Nope.  It's usnig the foomatic print filters which in turn use
ghostscript to render PDF.

> So you have to have Acrobat installed. Don't you?

No you just need a good printing system.  CUPS + foomatic works
great for me.  It knows what to do with postcript, text, PDF,
dvi, and a whole boatload of other fileformats that I don't
ever use.

> I want to avoid it installing a module that could do it (maybe
> I'm dreaming:( ). If there's no solution, then I will be very
> sad :-S
>
> This is what exactly I need to do: Generate an invoice of
> 216cm width and 93cm height (1/3 of the height of a letter
> paper size), and print it respecting these dimensions. So,
> when I print this page on a dot matrix printer, it stops at
> those 93cm of height for continuous printing.
>
> What I tried: I created a pdf file manually with these
> dimensions, and right-click on the pdf file, and selected
> "print". It just work under Windows XP with Acrobat Reader
> 7.0, but I want to do it from a Win98 as well.

Ah.  You're using Windows.  I didn't know that.  I've no clue
what to do under Windows.

-- 
Grant Edwards                   grante             Yow!  .. someone in DAYTON,
                                  at               Ohio is selling USED
                               visi.com            CARPETS to a SERBO-CROATIAN


From simon.brunning at gmail.com  Tue Apr 19 07:51:18 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Tue, 19 Apr 2005 12:51:18 +0100
Subject: Why does python class have not private methods? Will this never
	changed?
In-Reply-To: <311b5ce105041902165a0969a0@mail.gmail.com>
References: <311b5ce105041902165a0969a0@mail.gmail.com>
Message-ID: <8c7f10c6050419045154d0c82e@mail.gmail.com>

On 4/19/05, could ildg <could.net at gmail.com> wrote:
> Python is an oop language,

Yes.

> Private stuff always makes programming much easier.

That contention is, at best, debatable. See
http://groups-beta.google.com/group/comp.lang.python/msg/b977ed1312e10b21.

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From quantumcheesedog at gmail.com  Wed Apr  6 19:56:59 2005
From: quantumcheesedog at gmail.com (python newbie)
Date: Wed, 06 Apr 2005 23:56:59 GMT
Subject: Harvestman install not working
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
	<1112811970.231676.122830@g14g2000cwa.googlegroups.com>
Message-ID: <fH_4e.19544$zl.17472@newssvr13.news.prodigy.com>

Thanks Anand, (both for writing Harvest,  and for the reply.)
By the way, I did try that, so that the command is:

c:\python23\python.exe install.py py2exe -O2 --packages=encodings

And this time the dist folder was created, but there were only these files
in there:

library.zip
python23.dll
unicodedata.pyd
w9xpopen.exe
zlib.pyd
_sre.pyd

I'll keep trying though.


"Anand" <abpillai at gmail.com> wrote in message
news:1112811970.231676.122830 at g14g2000cwa.googlegroups.com...
> Hi
>
>    Latest version of py2exe does not support the option
> --force-imports anymore I think. You can edit the .bat file to remove
> that option. It should work.
>
> -Anand
>





From bj_666 at gmx.net  Sat Apr  2 11:30:23 2005
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 02 Apr 2005 18:30:23 +0200
Subject: Performance issue
References: <mailman.1239.1112456748.1799.python-list@python.org>
Message-ID: <pan.2005.04.02.16.24.39.340764@gmx.net>

In <mailman.1239.1112456748.1799.python-list at python.org>, Tom Carrick
wrote:

> [?] Also, I was wondering if there was a more
> builtin, or just nicer way of converting a string to a list (or using
> the sort function on a list) than making a function for it.

Use the `list()` builtin on the string and *just* the `sort()` method::

  In [2]: characters = list('hello')

  In [3]: characters
  Out[3]: ['h', 'e', 'l', 'l', 'o']

  In [4]: characters.sort()

  In [5]: characters
  Out[5]: ['e', 'h', 'l', 'l', 'o']

> sorted_anagram = anagram.lower()
> sorted_anagram = string2list(anagram)
> sorted_anagram.sort(lambda x, y: cmp(x, y))

sorted_anagram = list(anagram.lower())
sorted_anagram.sort()

> while words:
>     if len(words[0]) == len(sorted_anagram):
>         wordlist = string2list(words[0])
>         wordlist.sort(lambda x, y: cmp(x, y))
>         sorted_wordlist = wordlist
>         if sorted_anagram == sorted_wordlist:
>             found.append(words[0])
>     del words[0]

And here's the performance issue.  Deleting the first element of a list
results in moving all remaining elements one index down.  Better iterate
over the words in a for loop::

  for word in words:
    # use `word` instead of `word[0]` in the loop body.
    ...

Ciao,
	Marc 'BlackJack' Rintsch



From lee at example.com  Tue Apr 26 17:08:27 2005
From: lee at example.com (Lee Harr)
Date: Tue, 26 Apr 2005 21:08:27 GMT
Subject: [pygame]  Very simple program fails.  Why?
References: <1tWdneW8RMsvEPPfRVn-og@comcast.com>
Message-ID: <f5ybe.4628$hg.4192@news01.roc.ny>

On 2005-04-26, Brent W. Hughes <brent.hughes at comcast.net> wrote:
> I'm just starting to learn pygame.  I write what I think is just about the 
> simplest program that should display a window and then quit.
> #-----------------------------------------------
> import sys
> import time
> import pygame
>
> pygame.init()
> screen = pygame.display.set_mode((640,480))
> pygame.display.set_caption("A Bug's Life")
> time.sleep(4)
> #-----------------------------------------------
> When I run this program from within PythonWin, the Bug's Life window appears 
> and everything looks okay, but after 4 seconds the window still persists. 
> When I finally close it using the close box in the upper right of the 
> window, a box pops up telling me an error occurred ant it wants to send a 
> report to Microsoft.  I click "Don't send" and another box pops up telling 
> me that the program was trying to access memory location 0x1c.
>
> If I try to run the program stand-alone (outside of PythonWin), a DOS box 
> pops up for a second or two, then the Bug's Life window flashes up for a 
> fraction of a second, and then both windows disappear.
>
> Am I doing something wrong?
>


Works perfectly for me on Linux, but that does not help
you much...  If no one helps you out further here, make
your way over to the pygame mailing list. Someone will
be able to spot the problem:
http://pygame.org/info.shtml#maillist


From fredrik at pythonware.com  Wed Apr 27 11:28:04 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 27 Apr 2005 17:28:04 +0200
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com><8664y9n8hy.fsf@guru.mired.org><1114512016.930540.164920@g14g2000cwa.googlegroups.com><01os61t4vg97o4seimge9sppqf9shj7pns@4ax.com><86mzrlkkxb.fsf@guru.mired.org>
	<723v61p699er30n78ngbm22r77jcson21h@4ax.com>
Message-ID: <d4oanv$pch$1@sea.gmane.org>

Christos TZOTZIOY Georgiou wrote:

> Although I don't have experience with FreeBSD, so far checking the
> exception's errno args does the job.

if that doesn't work on FreeBSD, FreeBSD is not a proper Unix.

> import errno
> 
> try:
>   ...
> except OSError, exc:
> if exc.errno == errno.ENOENT: # file inexistant
>      ...
> elif exc.errno == errno.EPERM: # no permissions
>      ...

make that

    elif exc.errno in (errno.EACCES, errno.EPERM): # no permissions

</F>



From jwkenne at attglobal.net  Wed Apr 13 19:28:38 2005
From: jwkenne at attglobal.net (John W. Kennedy)
Date: Wed, 13 Apr 2005 19:28:38 -0400
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <IWh7e.5359$EJ6.1679@fe11.lga>

Xah Lee wrote:
> http://python.org/doc/2.4.1/lib/module-re.html
> http://python.org/doc/2.4.1/lib/node114.html
> 
> ---------
> QUOTE
> The module defines several functions, constants, and an exception. Some
> of the functions are simplified versions of the full featured methods
> for compiled regular expressions. Most non-trivial applications always
> use the compiled form
> UNQUOTE
> 
> 
> What does a programer who wants to use regex gets out from this piece
> of motherfucking irrevalent drivel?

Until now, I have regarded you as a mildly amusing moron.

But now I find you're simply illiterate.

Buh-bye.

-- 
John W. Kennedy
A proud member of the reality-based community.


From ilias at lazaridis.com  Sun Apr 24 13:29:16 2005
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sun, 24 Apr 2005 20:29:16 +0300
Subject: [EVALUATION] - E03 - jamLang Evaluation Case Applied to Python
In-Reply-To: <d2mcra$ejm$1@usenet.otenet.gr>
References: <d2mcra$ejm$1@usenet.otenet.gr>
Message-ID: <d4gk70$5o1$1@usenet.otenet.gr>

Ilias Lazaridis wrote:
> [EVALUATION] - E02 - Support for MinGW Open Source Compiler
> http://groups-beta.google.com/group/comp.lang.python/msg/f5cd74aa26617f17
> 
> -
> 
> In comparison to the E02 thread, now a more practical one.
> 
> -
> 
> Here is a simple evaluation template (first part) which can be applied 
> to the Python language:
> 
> http://lazaridis.com/case/lang/index.html
> 
> If you like, please post the most elegant solutions (either to sections 
> or to the whole document).
> 
> I will collect the results and write them down in a document, which will 
> compare python with other languages.
> 
> This document can serve as an flash-start (for people which simply like 
> to take a look on python).
> 
> http://lazaridis.com/case/lang/python.html

the first result:

http://lazaridis.com/case/lang/python.html

> You can see the ruby version here (which shows some limitations, which 
> python can hopefully overcome):
> 
> http://lazaridis.com/case/lang/ruby.html

.

-- 
http://lazaridis.com


From leszczynscy at nospamyahoo.com  Thu Apr 28 08:03:23 2005
From: leszczynscy at nospamyahoo.com (Andy Leszczynski)
Date: Thu, 28 Apr 2005 07:03:23 -0500
Subject: How remove directories with the content in the platform
 independent way?
In-Reply-To: <1114572265.625931.221840@l41g2000cwc.googlegroups.com>
References: <SdqdnQZ3Ia9ZavPfRVn-sg@comcast.com>
	<mailman.2555.1114569257.1799.python-list@python.org>
	<7_adnZPgfvQeYfPfRVn-rg@comcast.com>
	<7_adnZLgfvS1YPPfRVn-rg@comcast.com>
	<1114572265.625931.221840@l41g2000cwc.googlegroups.com>
Message-ID: <NcOdnaPKGLzKTe3fRVn-gw@comcast.com>

Jason Mobarak wrote:
> There's also the shutil module, which is platform independant.
> 
> http://docs.python.org/lib/module-shutil.html
> 
> ...see the rmtree function
> 
Thanks, this is what I was looking for.

A.


From paul.keating at nibcapital.com  Mon Apr 18 06:44:29 2005
From: paul.keating at nibcapital.com (Paul Keating)
Date: 18 Apr 2005 03:44:29 -0700
Subject: [PythonWin] MakePy and gencache.EnsureModule() do different things.
Message-ID: <941501e5.0504180244.c0bc8df@posting.google.com>

I used MakePy to generate .py support for a COM dll. That created the
file

30D58DAF-B538-45F1-8EFF-F69ABA2BA798x0x1x13.py

I want to be sure that this file is present and so I used MakePy -i to
construct a call to gencache.EnsureModule().

This is what it said:

{30D58DAF-B538-45F1-8EFF-F69ABA2BA798}, lcid=0, major=1, minor=13
 >>> # Use these commands in Python code to auto generate .py support
 >>> from win32com.client import gencache
 >>> gencache.EnsureModule('{30D58DAF-B538-45F1-8EFF-F69ABA2BA798}',
0, 1, 13)

But when I execute this code, it creates the support as a package,
that is, there is a _folder_ called

30D58DAF-B538-45F1-8EFF-F69ABA2BA798x0x1x19

(NB minor version is 19 not 13) with separate .py files for each
interface and class inside, and an __init__.py.

If the EnsureModule() call has not been called to generate the
package, then win32com.client.CastTo() fails when called with a
class-instance and interface defined in the COM dll. It complains that
it can't find the package ...x19.

Can anyone explain the version number difference (I realize that
19=0x13 but that doesn't help me understand it much), the
package/single file difference, and why Dispatch responds to the one,
but CastTo expects the other?


From elbertlev at hotmail.com  Mon Apr 11 23:39:12 2005
From: elbertlev at hotmail.com (elbertlev at hotmail.com)
Date: 11 Apr 2005 20:39:12 -0700
Subject: Threads and variable assignment
In-Reply-To: <vu9f3d.8fh.ln@lightning.itga.com.au>
References: <vu9f3d.8fh.ln@lightning.itga.com.au>
Message-ID: <1113277152.402387.70890@z14g2000cwz.googlegroups.com>

Theoretically you have to use lock, while accesing the isgood instance,
but... practically noting bad can happen IN THIS PARTICULAR CASE, if
you don't. Python uses Global Interpreter Lock. In other  words only
one thread is running at any particular moment. Thread scheduling is
preemptive, but "atomic" actions are not interrupted. Bollean asigment
is an atomic action.

WELCOME TO THE POWER OF MULTITHREADING :)



From cdkrug at worldnet.att.net  Wed Apr 27 22:31:03 2005
From: cdkrug at worldnet.att.net (Charles Krug)
Date: Thu, 28 Apr 2005 02:31:03 GMT
Subject: Is there a better interactive plotter then pylab?
References: <JzWbe.658796$w62.18013@bgtnsc05-news.ops.worldnet.att.net>
	<mailman.2609.1114653376.1799.python-list@python.org>
Message-ID: <HVXbe.659176$w62.525664@bgtnsc05-news.ops.worldnet.att.net>

On Wed, 27 Apr 2005 20:56:07 -0500, John Hunter
<jdhunter at ace.bsd.uchicago.edu> wrote:
>>>>>> "Charles" == Charles Krug <cdkrug at worldnet.att.net> writes:
> 
>    Charles> List: I'm trying to us pylab to see what I'm doing with
>    Charles> some DSP algorithms, in case my posts about convolution
>    Charles> and ffts weren't giving it away.
> 
>    Charles> I've been using pylab's plot function, but I'm finding it
>    Charles> a bit cumbersome.
> 
>    Charles> It works, but if I switch from the interactive window to
>    Charles> the plot window and back, the plot window gets trashed.
> 
>    Charles> Is there a better alternative for interactive use?
> 
> You are probably not using pylab interactive mode properly.
> matplotlib has several GUI backends (gtk, tk, qt, etc...).  Most GUIs
> take control with their mainloop and prevent further interaction.
>>From what you describe, I'm pretty sure you haven't setup your
> configuration properly for interactive use.  Fortunately, there are a
> couple of solutions.
> 
> For the standard python shell, you need to use the TkAgg backend.
> Tkinter is the only python GUI that plays nicely with the standard
> python shell.  You will need to set "backend : TkAgg" and 
> "interactive : True" in the matplotlib rc file.  See
> http://matplotlib.sf.net/interactive.html for details and
> http://matplotlib.sf.net/.matplotlibrc for information on the
> configuration file.
> 

Those are already set.  I'm taking a look at ipython now.



From fredrik at pythonware.com  Wed Apr 13 08:11:12 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 13 Apr 2005 14:11:12 +0200
Subject: how to explain such codes, python's bug or mine?
References: <d3iqhe$1s0l$1@mail.cn99.com><1113386913.961445.165950@z14g2000cwz.googlegroups.com>
	<d3j0pf$1tjo$1@mail.cn99.com>
Message-ID: <d3j22u$v4c$1@sea.gmane.org>

"MaHahaXixi" <enjoy_linux at hotmail.com> wrote:

> for python, i am a newbie, but i did not found the warning of such usage
> from the python tutorial

    "4.2 for Statements"

    "It is not safe to modify the sequence being iterated over in the loop (this
    can only happen for mutable sequence types, such as lists). If you need
    to modify the list you are iterating over (for example, to duplicate selected
    items) you must iterate over a copy." (followed by an example)

</F> 





From cam.ac.uk at mh391.invalid  Fri Apr 15 11:09:27 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 15 Apr 2005 16:09:27 +0100
Subject: eval function not working how i want it dag namn
In-Reply-To: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
Message-ID: <d3olf8$7s7$1@gemini.csx.cam.ac.uk>

robcarlton wrote:

> I've written this function to make a list of all of an objects
> attributes and methods (not for any reason, I'm just learning)
> 
> def list_members(obj)
>     l = dir(obj)
>     return map(lambda x : eval('obj.'+x), l)

That works fine for me with Python 2.4.

This is the best way to do it:

def list_members(obj):
     return [getattr(obj, name) for name in dir(obj)]

Although personally I would prefer to have this information in dict 
form, so i'd use:

return dict((name, getattr(obj, name)) for name in dir(obj))

For objects defined in CPython, you can use obj.__dict__, but this is 
somewhat hacky, and I'd avoid it.
-- 
Michael Hoffman


From sm.synonymous at gmail.com  Sun Apr 17 05:34:42 2005
From: sm.synonymous at gmail.com (Synonymous)
Date: 17 Apr 2005 02:34:42 -0700
Subject: Pattern Matching Given # of Characters and no String Input;
	use RegularExpressions?
Message-ID: <ae0b1ff7.0504170134.66a01b0c@posting.google.com>

Hello,

Can regular expressions compare file names to one another. It seems RE
can only compare with input i give it, while I want it to compare
amongst itself and give me matches if the first x characters are
similiar.

For example:

cccat
cccap
cccan
dddfa
dddfg
dddfz

Would result in the 'ddd' and the 'ccc' being grouped together if I
specified it to look for a match of the first 3 characters.

What I am trying to do is build a script that will automatically
create directories based on duplicates like this starting with say 10
characters, and going down to 1.  This way "Vacation1.jpg,
Vacation2.jpg" would be sent to its own directory (if i specifiy the
first 8 characters being similiar) and "Cat1.jpg, Cat2.jpg" would
(with 3) as well.

Thanks for your help and interest!

S M


From rpmuller at gmail.com  Wed Apr  6 22:53:04 2005
From: rpmuller at gmail.com (RickMuller)
Date: 6 Apr 2005 19:53:04 -0700
Subject: sorting a list and counting interchanges
In-Reply-To: <1112835544.302702.294570@z14g2000cwz.googlegroups.com>
References: <1112826641.728979.278530@f14g2000cwb.googlegroups.com>
	<mf%4e.318$Xm3.61@trndny01>
	<1112835544.302702.294570@z14g2000cwz.googlegroups.com>
Message-ID: <1112842384.860758.287740@z14g2000cwz.googlegroups.com>

Thanks, this will indeed work. I guess I've gotten out of the habit of
writing cmp functions since Tim Peter's introduction to the sorting
chapter in the first edition of the Python Cookbook convinced me it was
inefficient. But the lists should be short here and this should work.



From tpherndon at gmail.com  Fri Apr 22 16:40:11 2005
From: tpherndon at gmail.com (Peter Herndon)
Date: 22 Apr 2005 13:40:11 -0700
Subject: PDF Printing support from Python
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
Message-ID: <1114202411.647429.290030@o13g2000cwo.googlegroups.com>

Grant's example is not for Windows, Daniel, but it does illustrate a
certain principle:  if you have a printer driver that understands PDF,
or some other external software such as Acrobat Reader that understands
PDF, then printing the PDF is as simple as telling the OS to just print
the file.

If you are looking for some software that acts as a PDF-understanding
interpreter, that must run under Windows 98, I don't know of any
written in Python.  However, you might want to research some of the
available non-Python utilities.  Ghostscript, for example, is available
at http://www.cs.wisc.edu/~ghost/ and has a version for Win32.  You
could easily use Python to drive GhostScript.

Does that fit your needs?

---Peter



From tim at tt1lock.org  Sat Apr 23 11:52:01 2005
From: tim at tt1lock.org (Tim Tyler)
Date: Sat, 23 Apr 2005 15:52:01 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<mailman.2344.1114264376.1799.python-list@python.org>
Message-ID: <IFEpEp.7Gz@bath.ac.uk>

Mage <mage at mage.hu> wrote or quoted:

> check this: http://wiki.w4py.org/pythonvsphp.html

Good - but it hardly mentions the issue of security - which seems
like a bit of a problem for PHP at the moment.
-- 
__________
 |im |yler  http://timtyler.org/  tim at tt1lock.org  Remove lock to reply.


From qwweeeit at yahoo.it  Sat Apr 16 18:34:32 2005
From: qwweeeit at yahoo.it (qwweeeit)
Date: 16 Apr 2005 15:34:32 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
	<1113410094.102181.315080@l41g2000cwc.googlegroups.com>
	<2ab23d7a.0504160648.2bcbfa9f@posting.google.com>
	<1113676095.558321.204570@l41g2000cwc.googlegroups.com>
Message-ID: <2ab23d7a.0504161434.576e102d@posting.google.com>

Hi,

Importing a text file from another o.s. is not a problem : I convert
it immediately using the powerful shell functions of Linux (and Unix).

I thank you for the explanation about classes, but I am rather dumb
and
by now I resolved all my problems without them...
Speaking of problems..., I have yet an error in parsing for literal
strings,
when there is more than one literal string by source line.

Perhaps it's time to use classes...


From skip at pobox.com  Sun Apr 17 20:40:10 2005
From: skip at pobox.com (Skip Montanaro)
Date: Sun, 17 Apr 2005 19:40:10 -0500
Subject: python.exe on Mac OS X!?
In-Reply-To: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>
References: <1113777681.330094.34320@l41g2000cwc.googlegroups.com>
Message-ID: <16995.490.638893.95661@montanaro.dyndns.org>


    Rodney> I did a source code build of Python 2.4.1 on OS X (10.3.8) and
    Rodney> the executable produced was 'python.exe'. Can someone tell me
    Rodney> whether this is a bug, feature, or UserError?

The default file system on MacOSX is case insensitive.  As a result the .exe
extension is required to disambiguate the generated executable from the
Python directory in the source distro.

Skip


From chirayuk at gmail.com  Mon Apr  4 02:56:59 2005
From: chirayuk at gmail.com (Chirayu Krishnappa)
Date: 3 Apr 2005 23:56:59 -0700
Subject: Corectly convert from %PATH%=c:\\X; "c:\\a;
	b" TO ['c:\\X', 'c:\\a; b']
In-Reply-To: <mailman.1265.1112561132.1799.python-list@python.org>
References: <20050403150134.GA3398@unpythonic.net>
	<200504032012.j33KCqU17294@unpythonic.net>
	<mailman.1265.1112561132.1799.python-list@python.org>
Message-ID: <1112597819.021205.289420@o13g2000cwo.googlegroups.com>

Its good to see what cpython did with the PATH. I now feel good about
taking the simple approach. It would be crazy if that sort of quoting
in the middle becomes something which works with too many applications
- and others are expected to keep up with it.

I guess I dont need to worry about unix PATHs now. 

Thanks,
Chirayu.



From hello at spamm.er  Fri Apr  1 02:43:36 2005
From: hello at spamm.er (alex goldman)
Date: Thu, 31 Mar 2005 23:43:36 -0800
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
Message-ID: <1498066.d23UzBfE8y@yahoo.com>

Daniel Silva wrote:

> At?any?rate,?FOLD?must?fold.

I personally think GOTO was unduly criticized by Dijkstra. With the benefit
of hindsight, we can see that giving up GOTO in favor of other primitives
failed to solve the decades-old software crisis.


From m at m.com  Thu Apr 28 09:02:48 2005
From: m at m.com (monkey)
Date: Thu, 28 Apr 2005 21:02:48 +0800
Subject: Can .py be complied?
References: <426ec8f7_2@rain.i-cable.com> <426f562f$1_3@rain.i-cable.com>
	<116v84ftiq01ucb@corp.supernews.com>
	<426fb233$1_2@rain.i-cable.com>
	<116vefldolc6p88@corp.supernews.com>
Message-ID: <4270defb$1_1@rain.i-cable.com>

Thx very much, I got the point now ( ;

> The latter.  It's not completely self contained, there is an
> ..exe and some dll files that need to be distributed together.
> It's explained very clearly by the py2exe web site:
>
>   http://starship.python.net/crew/theller/py2exe/
>
> Never used google before?  Just go to www.google.com and type
> in py2exe.  Click "search".  It's the first hit.
>
> -- 
> Grant Edwards                   grante             Yow!  Is something
VIOLENT
>                                   at               going to happen to a
>                                visi.com            GARBAGE CAN?




From jerf at jerf.org  Sat Apr 30 21:13:34 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 30 Apr 2005 21:13:34 -0400
Subject: compare two voices
References: <1114916457.795332.45220@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2005.05.01.01.13.33.665804@jerf.org>

On Sat, 30 Apr 2005 20:00:57 -0700, Qiangning Hong wrote:

> I want to make an app to help students study foreign language.  I want the
> following function in it:
> 
> The student reads a piece of text to the microphone. The software records
> it and compares it to the wave-file pre-recorded by the teacher, and gives
> out a score to indicate the similarity between them.
> 
> This function will help the students pronounce properly, I think.

Do you have any idea what it takes to compare two voices in a
*meaningful* fashion? This is a serious question. I can't guarantee
there is no app to help with this, but if it does exist, it either costs a
lot of money, or will be almost impossible to use for what you want
(boiling two voice samples down to a speaker-independent single similarity
number... the mind boggles at the possible number of ways of defining that).
Quite possibly both.

If you *do* know something about the math, which, by the way, is graduate
level+, then you'd do better to go look at the open source voice
recognition systems and ask on those mailing lists. 

No matter how you slice it, this is not a Python problem, this is an
intense voice recognition algorithm problem that would make a good PhD
thesis. I have no idea if it has already been done and you will likely get
much better help from such a community where people might know that. I am
aware of the CMU Sphinx project, which should get you started Googling.
Good luck; it's a great idea, but if somebody somewhere hasn't already
done it, it's an extremely tough one.

(Theoretically, it's probably not a horrid problem, but my intuition leads
me to believe that turning it into a *useful product*, that corresponds to
what humans would say is "similar", will probably be a practical
nightmare. Plus it'll be highly language dependent; a similarity algorithm
for Chinese probably won't work very well for English and vice versa. All
this, and you *could* just play the two sounds back to the human and let
their brain try to understand it... ;-) )

Waiting for the message pointing to the Sourceforge project that
implemented this three years ago... 


From gferreri at gmail.com  Sun Apr  3 16:37:21 2005
From: gferreri at gmail.com (gferreri at gmail.com)
Date: 3 Apr 2005 13:37:21 -0700
Subject: help with python-devel!!!
Message-ID: <1112560641.532271.242920@g14g2000cwa.googlegroups.com>

I am trying to install Numeric python which fails because I do not have


"/usr/lib/python-2.3/config/Makefile"

I've done some research and figured out I don't have the "python-devel"
package ... how do I get this?? I'm running Mandrake 10.1 and typing
"urpmi python-devel" does not work (it can't find a package by that
name) .. I've tried building and installing python from source, but it
does not install the config directory...

Any ideas of what I have to do to get python-devel installed on my
system?  Thanks!



From gandalf at geochemsource.com  Fri Apr  8 09:50:47 2005
From: gandalf at geochemsource.com (Laszlo Zsolt Nagy)
Date: Fri, 08 Apr 2005 15:50:47 +0200
Subject: Parent module idea dropped? [Python import parent package]
In-Reply-To: <425628FE.9080901@geochemsource.com>
References: <mailman.1478.1112870310.1799.python-list@python.org>	<8cf2994e.0504071024.69de669f@posting.google.com>
	<425628FE.9080901@geochemsource.com>
Message-ID: <42568C37.7090201@geochemsource.com>


> So finally I got the answer: there was a "parent package" feature in 
> the ni module but it was dropped of its awkwardness. This is not a big 
> loss but this is exatly the feature that I need. Is there a person on 
> this list who was against the "parent package" idea? He must know the 
> answer or a workaround :-)

I just created a new module that can handle the 'from __.__.SomeModule 
import SomeClass' notation.
Keywords: Python import parent package
What is the right place to make it available for others?

   Laci 2.0

-- 
_________________________________________________________________
  Laszlo Nagy		      web: http://designasign.biz
  IT Consultant		      mail: gandalf at geochemsource.com

     		Python forever!


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From osv at javad.ru  Thu Apr 21 10:50:15 2005
From: osv at javad.ru (Sergei Organov)
Date: 21 Apr 2005 18:50:15 +0400
Subject: goto statement
References: <mailman.2158.1113989043.1799.python-list@python.org>
	<dqCdneMCDr764fvfRVn-tA@powergate.ca>
	<426767FD.5050104@i.com.ua> <d483v0$ch1$1@n6.co.ru>
	<d485ds$n8n$1@news.tsystems.kiev.ua>
Message-ID: <d48ej7$ddn$1@n6.co.ru>

Maxim Kasimov <kasimov at i.com.ua> writes:
> Sergei Organov wrote:
> > Maxim Kasimov <kasimov at i.com.ua> writes:
> >
> 
> >>1. comment for debug
> >>
> >>    It can be used in the same way, as the comments for debugging are used,
> >>but it will be easier than to use """ or ''', or using features of
> >>text-editors, when it is necessary to comment piece of code which already
> >>contains ''' or/and """ strings already, or there is another #-comments.
> >>Using goto, you do not need to edit a code, which is unfamiliar to
> >>you.
>
> > .... and then you end up with situation when another goto jumps directly
> > into the body of the code you've just "commented" with your goto. Happy
> > debugging!
>
> if you can't control what you do - it is you private problem, not mine. Is't
> it?

Hopefully I do control what I do. However, wasn't it you who spoke about
"code, which is unfamiliar"? Obviously you advocate using goto to
comment out a code that has been written by somebody else. I don't see
any way for you or me to control what those "somebody" did with goto
provided that goto is there in the language, sorry.

Overall, using goto for commenting something out is not any better than
""" or ''', as the code to be commented out could contain labels and you
will need to find and comment out all the goto that jump to these labels
as well. Happy debugging!

-- 
Sergei.


From me at privacy.net  Sat Apr 16 07:59:19 2005
From: me at privacy.net (Unknown User)
Date: Sat, 16 Apr 2005 08:59:19 -0300
Subject: Is Python appropriate for web applications?
References: <op.so85a1bgr3xrds@sony> <d3nvlj$oud$1@swifty.westend.com>
Message-ID: <op.spbp85ver3xrds@sony>

Thank you very much.


On Fri, 15 Apr 2005 06:47:14 -0300, Peter Maas <peter at somewhere.com> wrote:

> Unknown User schrieb:
>> I am a Python programmer and I'm thinking about learning PHP, which is
>> similar to C++
>
> wrong
>
>> (quite  different from Python).
>
> true
>
>> I want to start writing web applications. Do  you  think if I learn
>  > PHP I'll develop faster?
>
> Nobody but you can anawer this question. You'll have to try.
>
> Does PHP have more features?
>
> PHP has a rich library which probably outperforms any Python alternative
> in terms of features. But this doesn't necessarily mean that you will
> develop faster in PHP. The problem with Python is that you have to make
> a choice among many solutions (roughly ordered by inreasing complexity):
>
> - plain cgi
> - Quixote
> - modpython
> - CherryPy
> - Spice
> - Webware
> - Twisted
> - ZOPE
> ...
>
> Have a look at http://www.python.org/topics/web/
>
>> How about the speed  of execution?
>
> There is no simple answer. Both languages use C functions which are
> executed at CPU speed. But with interpreted code Python seems to be
> approximately 3-4 times faster than PHP (http://dada.perl.it/shootout/).
>
>> What are the pros and cons?
>
> http://www.allsites.com/Top.Computers.Programming.Languages.Comparison_and_Review.html
>



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


From vze4rx4y at verizon.net  Sat Apr  2 04:24:30 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sat, 02 Apr 2005 09:24:30 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca>
Message-ID: <ixt3e.1907$7b.368@trndny01>

[Peter Hansen]
> If py.test provides a driver utility that does
> effectively this, well, that's nice for users.  If
> it doesn't run them as separate processes, it wouldn't
> suit me anyway.
>
> Still, it sounds like it does have a strong following
> of smart people: enough to make me want to take a
> closer look at it to see what the fuss is about. :-)

FWIW, py.test scales nicely.  Also, it takes less time to try
it out or read the docs than discuss it to death on a newsgroup.
The learning curve is minimal.


Raymond Hettinger






From sidharth.kuruvila at gmail.com  Fri Apr  1 16:02:38 2005
From: sidharth.kuruvila at gmail.com (Sidharth)
Date: 1 Apr 2005 13:02:38 -0800
Subject: Attributes and built-in types
In-Reply-To: <opstad-E606C0.12421701042005@reader0901.news.uu.net>
References: <opstad-E606C0.12421701042005@reader0901.news.uu.net>
Message-ID: <1112389358.455645.181310@f14g2000cwb.googlegroups.com>

You might find this usefull specifically the stuff on subclassing
built-in types.
http://www.python.org/2.2/descrintro.html



From gerald.maher at waytohere.com  Mon Apr 11 18:26:29 2005
From: gerald.maher at waytohere.com (gerald.maher at waytohere.com)
Date: 11 Apr 2005 15:26:29 -0700
Subject: Missing Module when calling 'Import' _omnipy
Message-ID: <1113258389.432002.323790@f14g2000cwb.googlegroups.com>

I am trying to run an Corba example using Python and i get the follwing
error:


    import _omnipy
ImportError: No module named _omnipy

Where can i find this Module ?



From bearophileHUGS at lycos.com  Sun Apr 24 17:43:00 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 24 Apr 2005 14:43:00 -0700
Subject: Bounding box on clusters in a 2D list
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
	<1114361783.478573.70430@g14g2000cwa.googlegroups.com>
Message-ID: <1114378980.909132.216600@f14g2000cwb.googlegroups.com>

superprad at gmail.com:
> hi Bearphile! That really gives me an idea.Thanks much for that. Yes
as
> you said the algorithm reaches a maximium recursion depth for larger
> sets i tried.

You can improve the little flood filling function, avoiding the "bad"
Python recursivity.


> Do you see where I am heading

Your problem still looks a bit ill defined to me (see Bengt Richter's
nested boxes case), but you can probably modify this part of my
connected():

.   freq = {}
.   for row in m:
.     for e in row:
.       if e in freq:
.         freq[e] += 1
.       else:
.         freq[e] = 1

For the *values* of the freq dictionary you can use the 4 coordinates
of the bounding box of the key-specific cluster, that is updating its
far left, far right, etc. coordinates, with something like this:

box[e] = ( max(x, box[e][0]), min(x, box[e][1]), max(y, box[e][2]),
min(y, bbox[e][3] )

Or something faster/more correct. It's not difficult, I presume.
(connected() debug: if you want to keep the original matrix m, at the
end of the connected() you can set at 1 all its values different from
0.)

Bear hugs,
Bearophile



From dimitri.pater at gmail.com  Fri Apr 15 17:53:41 2005
From: dimitri.pater at gmail.com (dimitri pater)
Date: Fri, 15 Apr 2005 23:53:41 +0200
Subject: Tkinter multilistbox in scrolledframe
Message-ID: <e75321bd0504151453170034de@mail.gmail.com>

Hello!

I recently included this very nice recipe for the multilistbox in my 
application:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52266

however, I can't seem to place it inti a scrolledframe, this is what I do:

/snip
self.frame1 = Pmw.ScrolledFrame(page,
labelpos = 'n',
label_text = 'Database',
vertflex="elastic")
self.frame1.pack(fill="both", expand=1)
/snip

/snip
columns = tuple([x[0:1] for x in fg.fields])
columns2 = tuple([x+(15,) for x in columns])

self.mlb = MultiLB.MultiListbox(self.frame1.interior(), columns2)

for i in range(len(fg.data)):
self.mlb.insert("end", fg.data[i])

self.mlb.pack(expand=1, fill="both") 
/snip

the horizontal scrollbar is displayed correctly, but the vertical scrollbar 
is only visible when you scroll to the far right side of the screen.
So, apparently it is added to the last listbox in stead of to the 
scrolledframe itself.

Any suggestions, anyone?
(btw, I also posted this to the tkinter mailing list but it bounced. Is this 
list inactive?)

Thanks!

Dimitri
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From steven.bethard at gmail.com  Mon Apr 11 14:42:12 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 11 Apr 2005 12:42:12 -0600
Subject: variables exist
In-Reply-To: <mailman.1703.1113237192.1799.python-list@python.org>
References: <9622d535.0504110552.1e070e8d@posting.google.com>	<d3e0jj$93d$1@sea.gmane.org>
	<mailman.1703.1113237192.1799.python-list@python.org>
Message-ID: <IKudnXssOaKYWMffRVn-vw@comcast.com>

Brian van den Broek wrote:
> Fredrik Lundh said unto the world upon 2005-04-11 10:14:
>> "fabian" wrote:
>>> how testing if a variable exists in python as isset in php??
>>
>> try:
>>     variable
>> except NameError:
>>     print "variable not set"
>>
>> but that is really lousy Python; better make sure you always assign to
>> all variables, and use None (or another suitable value) to mark that some
>> variable has no meaningful content right now.
>>
>> that is, instead of
> <SNIP full try/except example>
>> write
>>
>>     variable = None
>>     if condition:
>>         variable = 1
>>     ...
>>     if variable is None:
>>         print "variable not set"
> 
> I'm a hobbyist and still learning, but the claim the try/except is
> "lousy Python" surprise me a bit. The try/except way seems like an
> instance of "Easier to ask Forgiveness than Permission", and my sense
> is that in 95% of cases that approach is widely considered more Pythonic 
> than LBYL (of which the suggested idiom seems reminiscent).
> 
> As it happens, most of my code does preset names to None, but reading
> this thread made me wonder. Are you suggesting setting to None is
> better as it makes explicit that there is nothing there, but this may
> change in the future? (This is why I do it.) Or for some other reason?

I had a similar reaction to Fredrik's statement.  In general, I wouldn't 
call a try/except solution lousy style, as long as the path through 
except was sufficiently "exceptional".  That is, for code like:

     if condition_that_happens_99_percent_of_the_time:
         variable = 1
     try:
         variable
     except NameError:
         print "variable not set"

seems perfectly reasonable to me, because the exception is caught in the 
*exceptional* case.  However, if one case isn't clearly the exceptional 
one, then it probably doesn't makes sense to use an exception, and I'd 
write it like:

     variable = None
     if condition_that_happens_40_percent_of_the_time:
         variable = 1
     ...
     if variable is None:
         print "variable not set"

Actually, I typically refactor my code so that I can write situations 
like this as:

     if condition_that_happens_40_percent_of_the_time:
         variable = 1
         ...
     else:
         print "variable not set"

But the point still stands.  If the variable being unset really is an 
exceptional case, use an exception.  If it's not, then an if/else block 
is probably the better way to go.

STeVe


From cjmaloof at gmail.com  Tue Apr  5 23:18:36 2005
From: cjmaloof at gmail.com (Chris Maloof)
Date: Tue, 05 Apr 2005 23:18:36 -0400
Subject: getting text from WinXP console
References: <ubir315f5lm15qh96tf9i2qiepqhfndne7@4ax.com>
	<d1q1n2$3pk$1@news01.intel.com>
Message-ID: <2uk651pjmsoivs2gnpuhloi5rfdvmpcrpo@4ax.com>

On Tue, 22 Mar 2005 13:11:59 -0800, "Mark T." <nospam at nospam.com>
wrote:

>
>"Chris Maloof" <cjmaloof at gmail.com> wrote in message
>news:ubir315f5lm15qh96tf9i2qiepqhfndne7 at 4ax.com...
>> Hello,
>>
>> Does anyone know how I can read the ASCII text from a console window
>> (from another application) in WinXP?  It doesn't sound like a major
>> operation, but although I can find the window via pywin32, I haven't
>> been able to do anything with it.  I'd really just like to get the
>> window text into a string.
>>
>> By "console window", I mean the sort of thing that comes up when you
>> run "command" (although this particular one is for the game NetHack).
>>
>> Thanks,
>> Chris
>
>Check out the Win32 Console functions on MSDN, such as AlocConsole(),
>ReadConsoleOutput(), GetStdHandle().  I don't see an easy way to get the
>screen buffer handle unless you are the process that owns the console,
>however.
>
>Mark
>
Yup, this is pretty much closest to what ended up working, after some
more research.  There might have been an easier way, but for the
archives, here's the meat of what I did (as seen also in the
python-win32 mailing list):

import win32process
from ctypes import *
import time

# Constants from winbase.h in .NET SDK
STD_INPUT_HANDLE = c_uint(-10) # (not used here)
STD_OUTPUT_HANDLE = c_uint(-11)
STD_ERROR_HANDLE = c_uint(-12) # (not used here)

startup = win32process.STARTUPINFO()
(hProcess, hThread, dwProcessId, dwThreadId) = \
win32process.CreateProcess("C:\myConsoleApp.exe",
                          "-X",
                          None,
                          None,
                          0,
                          0,
                          None,
                          None,
                          startup)
time.sleep(1) #wait for console to initialize

# Use ctypes to simulate a struct from the Win32 API
class COORD(Structure):
   _fields_ = [("X", c_short),
               ("Y", c_short)]

topleft = COORD(0,0)

CHARS_TO_READ = 200
result = create_string_buffer(CHARS_TO_READ)
count = c_int()

windll.kernel32.AttachConsole(c_uint(dwProcessId))
inHandle = windll.kernel32.GetStdHandle(STD_INPUT_HANDLE)
outHandle = windll.kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
errHandle = windll.kernel32.GetStdHandle(STD_ERROR_HANDLE)

# See Win32 API for definition
windll.kernel32.ReadConsoleOutputCharacterA(outHandle,
                                           result,
                                           CHARS_TO_READ,
                                           topleft,
                                           byref(count))

print result.value


From michael at stroeder.com  Fri Apr 29 08:16:10 2005
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Fri, 29 Apr 2005 14:16:10 +0200
Subject: ANN: python-ldap-2.0.7
Message-ID: <mailman.28.1114786084.14961.python-announce-list@python.org>

Find a new release of python-ldap:

  http://python-ldap.sourceforge.net/

python-ldap provides an object-oriented API to access LDAP directory
servers from Python programs. It mainly wraps the OpenLDAP 2.x libs for
that purpose. Additionally it contains modules for other LDAP-related
stuff (e.g. processing LDIF, LDAPURLs and LDAPv3 schema).

----------------------------------------------------------------
Released 2.0.7 2005-04-29

Changes since 2.0.6:

* Added preliminary support for sending LDAP controls
  with a request.
  Contributors:
  - Deepak Giridharagopal
  - Ingo Steuwer
  (Receiving controls in LDAP results still not supported.)

Modules:
* LDAPObject.c: removed l_ldap_manage_dsa_it()
* LDAPObject.c: Added missing #ifdef around l_ldap_passwd()
  for compability with older OpenLDAP libs.

Lib:/
* New algorithm in ldap.schema.tokenizer.split_tokens()
  contributed by Wido Depping which is more robust
  when parsing very broken schema elements
  (e.g. Oracle's OID).
* Fixed argument list (position of timeout) when calling
  LDAPObject.search_ext_s() from search_st() and search_s().
* LDAPObject.search_ext_s() correctly calls search_ext_s() now.
* Re-implemented LDAPObject.manage_dsa_it() without calling _ldap.


From grante at visi.com  Fri Apr 22 18:34:45 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 22:34:45 -0000
Subject: Python licence again
References: <mailman.2299.1114196095.1799.python-list@python.org>
	<1114197761.019100.38890@o13g2000cwo.googlegroups.com>
	<mailman.2306.1114199590.1799.python-list@python.org>
	<87fyxilehj.fsf@pobox.com> <FtCdneI1TKgS8vTfRVn-1w@powergate.ca>
	<42697785$0$2594$da0feed9@news.zen.co.uk>
Message-ID: <116iv05e3bi8vbc@corp.supernews.com>

On 2005-04-22, Will McGugan <news at NOwillmcguganSPAM.com> wrote:

>> How *do* you pronounce it?  "Thurrow" seems to match
>> how I say the word, along with everyone else I've
>> ever met (until now?).
>
> I would pronounce it like 'thurra', since I'm Scottish. It always makes 
> me cringe when Americans pronounce 'Edinburgh' as 'edin-burrow' rather 
> then 'edin-burra'.

The city in Pennsylvania is spelled "Edinboro", so there are a
few people over here with a decent excuse.

And it could be worse, we could call it "edun-burg".

-- 
Grant Edwards                   grante             Yow!  I feel like I'm
                                  at               in a Toilet Bowl with a
                               visi.com            thumbtack in my forehead!!


From ojokimu at yahoo.co.uk  Mon Apr  4 17:57:03 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Mon, 4 Apr 2005 22:57:03 +0100 (BST)
Subject: re module non-greedy matches broken
In-Reply-To: 6667
Message-ID: <20050404215703.30486.qmail@web26801.mail.ukl.yahoo.com>


--- lothar <lothar at ultimathule.nul> wrote:
> no - in the non-greedy regex
>   <1st-pat><not-1st-pat>*?<follow-pat>
> 
> <1st-pat>, <not-1st-pat> and <follow-pat> are arbitrarily complex
> patterns.

Could you post some real-world examples of the problems you are trying
to deal with, please? Trying to come up with general solutions for
arbitrarily complex patterns is a bit to hard for me :)

> with character classes and negative character classes you do not need
> non-greediness anyway.

And yet in the simple case you supplied it does make a difference:

>>> newdoc = "V1WVVV2WWW"
>>> vwre = re.compile("V[^V]*W")
['V1W', 'V2WWW']
>>> vwre = re.compile("V[^V]*?W")
>>> vwre.findall(newdoc)
['V1W', 'V2W']

Not exactly rocket-science, but it gets the job done...


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From tomlongridge at gmail.com  Tue Apr 19 12:12:00 2005
From: tomlongridge at gmail.com (Tom Longridge)
Date: 19 Apr 2005 09:12:00 -0700
Subject: Strings and Lists
References: <d769864e.0504180342.426357d3@posting.google.com>
Message-ID: <1113927120.080364.256910@g14g2000cwa.googlegroups.com>

Thank you all very much for your responses. It's especially reassuring
to hear about other Python GA's as I have had some scepticism about
Python's speed (or lack of it) being too big a problem for such an
application.

With regard to using numeric, arrays or integer lists -- I didn't
mention that these strings can also contain wild cards (so I suppose
it's not really binary -- sorry). This is traditionally done using a
'#' symbol, but I was imagining using a value of None in a boolean list
to represent this. Also there is currently a fair bit of research going
into other representations (floating-point values, paired values etc)
so I was hoping to be able to keep my framework extensible for the
future.

Many thanks again for your help. I will ``take the plunge'' and give
the boolean list a go I think!



From tim.peters at gmail.com  Mon Apr 11 13:05:13 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Mon, 11 Apr 2005 13:05:13 -0400
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <425aa0fb$0$38041$bed64819@news.gradwell.net>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
Message-ID: <1f7befae0504111005732a63dd@mail.gmail.com>

[Michael Kearns]
> ...
> Also, I don't believe that just 'owning' MSVC 7.1 is enough. From
> cursory glances at the various redist files, I would also have to ship
> the EULA, and as an end-user (of python) I can't just redistribute the
> files - perhaps I could write a place holder application in  MSVC to
> suggest that I was no longer an end-user, but this seems ridiculous as a
> workaround.
>
> There even seem to be 'exclude' clauses to redistribution concerning
> open-source material, but IANAL and ran from the various paragraphs.
>
> I would like to think that python would encourage as many folk as
> possible to use the language wherever it fits best (and perhaps even
> beyond) and yet this is going in the opposite direction.
>
> Would it be so difficult for a 'no legalese attached' version to be
> provided on windows, or at the very least, some kind of statement
> regarding what is and isn't allowed ?

I think it would be difficult.  "We" (the Python developers) didn't
write Microsoft's license, have no special insight wrt it, and aren't
lawyers either.  If you want legally binding clarifications or
exemptions, I think they have to come from Microsoft (it's their
license).

It would be cool if commercial users got together, pursued this with
MS, and shared what they learned.  Of course it would also be cool if
someone with no commercial MS interests did so, but the chance of that
happening seems nil.

> There seems nothing within the python distribution stating the redistribution
> rights of the dll (correct me if I'm wrong) which already seems contrary to the
> MS requirements.

That's possible too.  MS hasn't complained to the PSF yet, but that's
no guarantee they won't.

> As much as I'd like to continue using it, because of the vague legal
> situation, I can't, and that's unfortunate.

Maybe the Python Business Forum could take this on?  I don't know
whether they're still active, and their site isn't working today (at
least not for me):

    http://www.python-in-business.org/

If someone(s) volunteered to do the work, it's also possible (not
certain) that the PSF would pay for lawyer time.


From apardon at forel.vub.ac.be  Thu Apr 21 03:40:53 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 21 Apr 2005 07:40:53 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
	<mailman.2204.1114033804.1799.python-list@python.org>
Message-ID: <slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>

Op 2005-04-20, Terry Hancock schreef <hancock at anansispaceworks.com>:
> On Wednesday 20 April 2005 12:28 pm, Roy Smith wrote:
>> Terry Hancock wrote:
>> >> I used to make "off by one" errors all the time in both C and Fortran,
>> >> whereas I hardly ever make them in Python. 
>> 
>> Part of the reason may be that most loops over lists involve
>> iterators, 
>
>> both endpoints are mentioned explicitly.  C++/STL also uses iterators,
>> but the syntax is repulsive.
>
> That's true of course.  It's more likely to show up in manipulating
> lists or strings.  And Python provides a much richer environment for
> processing strings, so one has to deal with explicit indexing much
> less.
>
> But I still think that I make fewer error per instance of dealing with
> intervals. It's rare that I even have to think about it much when
> writing such a thing.   Negative indexing also helps a lot.

I'm anbivallent about negative indexes. It helps a lot, but can
be annoying a lot too. IMO it deters from the, its easier to
be forgiven than to get permission, style of programming.

It happens rather regularly that I need to do some calculations
and if the start conditions were good, I get a valid index for
a list and otherwise I get an invalid index. From this specification
the following seems a natural way to program

  try:
    index = calculate(...)
    lst[index] = ...
    ...
  except IndexError
    ...

But of course this doesn't work because a negative index in this
case is an invalid index but python allows it.

I sometimes think python should have been more explicite here,
using a marker for the start-index and end-index, may '^' and
'$'. So if you wanted the last element you had to write:

  lst[$]

And for the next to last element:

  lst[$ - 1]


This would make accessing list elements counted from the rear
almost just as easy as it is now but wouldn't interfere with
the ask forgiveness programming style.

-- 
Antoon Pardon


From gerald.maher at waytohere.com  Mon Apr 11 16:54:19 2005
From: gerald.maher at waytohere.com (gerald.maher at waytohere.com)
Date: 11 Apr 2005 13:54:19 -0700
Subject: Problem with import "from omniORB import CORBA, PortableServer"
In-Reply-To: <mailman.1713.1113250441.1799.python-list@python.org>
References: <1113247809.688746.233970@z14g2000cwz.googlegroups.com>
	<mailman.1713.1113250441.1799.python-list@python.org>
Message-ID: <1113252859.024163.323710@g14g2000cwa.googlegroups.com>

Thank for the reply, I think your right  my problem is the what version
to us, I want to write some Python scripts calling Corba Objects what
do i need ?

omnipython-1.5.2-1
omniORBpy 2.5
omniORB 4.0.5
Python 2.4.1


Is this correct ? i want to excuat the example
C:\omniORBpy-2.5-win32-python2.3\omniORBpy-2.5\examples\echo\example_echo_coloc.py

Ciao
Gerald



From ivanlan at pauahtun.org  Tue Apr 19 09:40:41 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Tue, 19 Apr 2005 07:40:41 -0600
Subject: Name/ID of removable Media: how?
References: <d42lho$fbf$1@news.mch.sbs.de>
Message-ID: <42650A59.3DF3C6DE@pauahtun.org>

Hi All--

Heiko Selber wrote:
> 
> I am trying to find out (using Python under windows) the name of a CD that
> is currently in the drive specified by a path name.
> 
> And while I am at it, I'd also like to know whether the specified drive
> contains a CD at all, and whether the drive is actually a CD drive.
> 
> AFAIK, Python doesn't provide a way to do it, and a search in the web
> yielded only soutions for Linux.
> 
> Can anyone show me a solution that works with windoze?
> 

This works.  The only thing you have to do is stuff a floppy into the
drive & find out what the fstype is (that's inf[-1] in the code below)
so you can key on it.  Try the docs for Mark Hammond's Win32, and
there's always his _Python Programming on Win32_.

import os
import os.path
import win32api

def findCDs():
    cdDrives=[]
    print "Searching for cd drives..."
    drives=win32api.GetLogicalDriveStrings().split(":")
    for i in drives:
        dr=i[-1].lower()
        if dr.isalpha():
            dr+=":\\"
            inf=None
            try:
                inf=win32api.GetVolumeInformation(dr)
            except:
                pass # Removable drive, not ready
            if inf!=None:
                if inf[-1].lower().endswith("cdfs"):
                    cdDrives.append([dr,inf])
                elif inf[-1].lower().endswith("udf"):
                    cdDrives.append([dr,inf])
    return cdDrives

inf[0] contains the volume label if there is one and if there's a CD
loaded:

>>> win32api.GetVolumeInformation("c:\\")
('God_C', -798323922, 255, 459007, 'NTFS')
>>>

Note that you must use the full drive spec, "letter:\\" or
GetVolumeInformation() doesn't always work.

There are probably better ways to do these things, but they do work;
I've been using them constantly the last few days.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From m_s_harelick at yahoo.com  Tue Apr 12 10:10:28 2005
From: m_s_harelick at yahoo.com (Matthew)
Date: 12 Apr 2005 07:10:28 -0700
Subject: Python / Win32 extensions compatibility with Windows XP
Message-ID: <1113315028.226858.245860@f14g2000cwb.googlegroups.com>

Hi:

I recently installed Python 2.4 and the Win 32 extensions on
Windows XP.  I had some problems with the COM makepy utility for the
Excel COM libraries.  I reported this problem to the sourceforge bug
tracker.

My question is , is python 2.3 and the win32 extensions more stable
than Python 2.4?

Thank You

Matthew Harelick



From mauriceling at acm.org  Tue Apr 26 23:00:48 2005
From: mauriceling at acm.org (Maurice LING)
Date: Wed, 27 Apr 2005 13:00:48 +1000
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
	<d4kh4q$tqf$1@domitilla.aioe.org> <86wtqqm27r.fsf@guru.mired.org>
	<d4ktck$r9a$1@domitilla.aioe.org> <86is29n9cg.fsf@guru.mired.org>
	<d4l825$mj7$1@domitilla.aioe.org> <86is29kkaw.fsf@guru.mired.org>
Message-ID: <d4mv93$rft$1@domitilla.aioe.org>

>>What can be done in PYAN is to encourage all 3rd party library
>>developers to centralize their libraries in it, which I think all will
>>gladly respond. All that is needed to be  deposited in PYAN is a
>>description file, like the simplest setup.py file. All that is needed
>>in this description file is
>>1. where to download the source codes (e.g. CVS)?
>>2. version number?
>>3. standard stuffs (optional) like authors, descriptions, copyright?
> 
> 
> To copy all of what CPAN does, you need to know what other modules it
> depends on, so you can automatically download those as well.
> 

Yes, dependencies are necessary to be declared. The maintainers of each 
package should list the dependencies as well to make it work.

> 
>>Python can then have a built-in mechanism to read the description file
>>and download the source codes and do the standard "sudo python
>>setup.py install" to install the library into site-package.
> 
> 
> I don't like this - it would make Python depend on sudo being
> available. I'd rather it not do that, and let each systems
> administrator issue the command according to *their* security policy.
> 

If you are installing packages into your home directory, then sudo is 
not needed. But if you are installing it for everybody's use, then it is 
necessary. Fink runs using superuser privileges.

> 
>>I think something like this can be set up for Python quite easily. I
>>recall some time back, there's a long discussion about setting up
>>Python's version of CPAN but I can't recall the contents of the
>>discussions.
> 
> 
> It's not clear it's easy. It's *very* clear it won't happen until
> someone steps up to do it. The latter is a problem. 
> 

I've posted my method in catelog-sig list. And is willing to offer some 
time on it... if that helps... But to get it working, I think it will 
need 5-10x more time than I can put into it...

Cheers
maurice



From farcepest at gmail.com  Thu Apr 28 09:59:16 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 28 Apr 2005 06:59:16 -0700
Subject: "mysql.h: No such file or directory" when building MySQL-python
References: <1114605610.575160.39010@z14g2000cwz.googlegroups.com>
Message-ID: <1114696756.495735.30200@z14g2000cwz.googlegroups.com>

francescomoi at europe.com wrote:

> I'm trying to build 'MySQL-python-1.2.0' on my Linux FC2:
...
> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -march=i386
> -mcpu=i686 -D_GNU_SOURCE -fPIC -fPIC -I/usr/include/python2.3 -c
> _mysql.c -o build/temp.linux-i686-2.3/_mysql.o -I'/usr/include/mysql'
> _mysql.c:41:19: mysql.h: No such file or directory
...
> My server configuration:
> ---------------------------
> [ ]# /usr/local/mysql/bin/mysql_config
> 	--cflags        [-I'/usr/local/mysql/include/mysql']
>         --libs          [-L'/usr/local/mysql/lib/mysql' -lmysqlclient
> -lz -lcrypt -lnsl -lm]
>         --socket        [/tmp/mysql.sock]
>         --port          [3306]
>         --version       [3.23.58]
...
> Any suggestion? Thank you very much.

Fedora's mysql_config puts quotes around the directory names, which
confuses things. Try MySQL-python-1.2.1c1. I don't think this entirely
solves the problem, but I think I know how to fix it for 1.2.1c2. But
try it and report your results here:

https://sourceforge.net/tracker/index.php?func=detail&aid=1146226&group_id=22307&atid=374932



From rkern at ucsd.edu  Mon Apr 11 21:37:49 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 11 Apr 2005 18:37:49 -0700
Subject: help: loading binary image data into memory
In-Reply-To: <20050412012905.GA3486@unpythonic.net>
References: <d3f6bo$2thb$1@news.wplus.net>
	<20050412012905.GA3486@unpythonic.net>
Message-ID: <d3f8jq$g32$1@sea.gmane.org>

Jeff Epler wrote:
> probably something like this: (untested)
>     def make_ftplib_callback(f):
>         def callback(block): f.write(block)
>         return callback
>     img = cStringIO.StringIO()
>     retrbinary( "get ???", make_ftplib_callback(img))

Ummm, how about

img = cStringIO.StringIO()
retrbinary("get ???", img.write)

?

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From fuzzyman at gmail.com  Wed Apr 13 07:34:11 2005
From: fuzzyman at gmail.com (Fuzzyman)
Date: 13 Apr 2005 04:34:11 -0700
Subject: Northampton, UK
In-Reply-To: <mailman.1798.1113339517.1799.python-list@python.org>
References: <1113315607.375554.171070@f14g2000cwb.googlegroups.com>
	<mailman.1798.1113339517.1799.python-list@python.org>
Message-ID: <1113392051.826766.298080@z14g2000cwz.googlegroups.com>


Martin Franklin wrote:
> Fuzzyman wrote:
> > Just on the off chance.... I thought I'd ask if there were any
> > Pythoneers out there local to Northampton UK ?
> >
> > Best Regards,
> >
> > Fuzzy
> > http://www.voidspace.org.uk/python
> >
>
> I'm just over the border (Bedfordshire) but like a lot of
> people commute :-(

Compared to most people on this list, you're practically next door :-)

I've just discovered the Python-UK mailing list. Hurrah.

Best Regards,

Fuzzy
http://www.voidspace.org.uk/python



From ivanlan at pauahtun.org  Sat Apr 30 09:29:32 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Sat, 30 Apr 2005 07:29:32 -0600
Subject: Fwd: how to find the drive in python/cygwin?
References: <1114540166.625601.50420@g14g2000cwa.googlegroups.com>
	<3511dc75050426113375a904e@mail.gmail.com>
	<426E9E0E.1020905@little-lisper.org>
	<3511dc7505042617524edd244a@mail.gmail.com>
	<426EE4B8.6910F6DD@pauahtun.org>
	<20050430132423.GA2824@tishler.net>
Message-ID: <4273883C.B25B19B0@pauahtun.org>

Hi All--

Jason Tishler wrote:
> 
> Ivan,
> 
> On Tue, Apr 26, 2005 at 07:02:48PM -0600, Ivan Van Laningham wrote:
> > Use win32api to find drives:
> >
> > ====cut here====
> > #!/usr/bin/python
> > # -*- coding: utf-8 -*-
> >
> > import os
> > import os.path
> > import win32api
> > [snip]
> 
> AFAICT, the win32api module has not been ported to Cygwin Python.
> 

I'm not running Cygwin, but Uwin.  I installed regular Python:


Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> ^Z                                      


with the win32api that matched.  I have no trouble running it.  Is there
some reason to prefer a Python compiled by the Cygwin tools?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From tsilande at hiit.fi  Wed Apr  6 10:07:15 2005
From: tsilande at hiit.fi (Tomi Silander)
Date: Wed, 06 Apr 2005 09:07:15 -0500
Subject: optparse and negative numbers as positional arguments
In-Reply-To: <11560md3p6drtc8@corp.supernews.com>
References: <115605ankljag93@corp.supernews.com>
	<11560md3p6drtc8@corp.supernews.com>
Message-ID: <1157r6s30dmfia2@corp.supernews.com>

Grant Edwards wrote:

> On 2005-04-05, Tomi Silander <tsilande at hiit.fi> wrote:

>>How is one supposed to give negative numbers as positional arguments 
>>when using optparse?
> 
>   ./mitvit.py -- -1.1

Thank you,
this works. I saw it in the source, but apparently did not properly pay 
attention; all the args after "--" are considered positional if I read 
this right.

ts.


From cam.ac.uk at mh391.invalid  Thu Apr 28 08:10:15 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Thu, 28 Apr 2005 13:10:15 +0100
Subject: dynamically generating temporary files through python/cgi
In-Reply-To: <d4qbdn$hia$1@gemini.csx.cam.ac.uk>
References: <1114669935.274048.63940@z14g2000cwz.googlegroups.com>
	<d4qbdn$hia$1@gemini.csx.cam.ac.uk>
Message-ID: <d4qjra$7cc$2@gemini.csx.cam.ac.uk>

Michael Hoffman wrote:

> The easiest way, in my mind would be to store the files in a directory 
> according to the hour they were requested, for example, a file generated 
> between 2 p.m. and 3 p.m. today:
> 
> http://www.example.com/temp/20050428T14/d41d8cd98f00b204e9800998ecf8427e.html 

Depending on the filesystem you use, generating thousands of files in a 
single directory might be somewhat inefficient. So you might want to 
make subdirectories based on the MD5 digest instead, like this:

http://www.example.com/temp/20050428T14/d4/1d/8cd98f00b204e9800998ecf8427e.html 

-- 
Michael Hoffman


From neuhauser+python-list#python.org at sigpipe.cz  Wed Apr 20 03:54:11 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Wed, 20 Apr 2005 09:54:11 +0200
Subject: To decode the Subject =?iso-8859-2?Q?=... in email in python
In-Reply-To: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>
References: <1113982235.201423.32480@l41g2000cwc.googlegroups.com>
Message-ID: <20050420075411.GA27151@isis.sigpipe.cz>

# dan.polansky at gmail.com / 2005-04-20 00:30:35 -0700:
> When parsing messages using python's libraries email and mailbox, the
> subject is often encoded using some kind of = notation. Apparently, the
> encoding used in this notation is specified like =?iso-8859-2?Q?=... or
> =?iso-8859-2?B?=.

    That's RFC 2047 encoding, both examples introduce an ISO8859-2
    string, the first variant says it's ascii-ized using
    "Q"uoted-Printable, the other says the string is "B"ase64-encoded.

> Is there a python library function to decode such a
> subject, returning a unicode string? The use would be like
> 
>   human_readable = cool_library.decode_equals(message['Subject'])

    quoting from http://docs.python.org/lib/module-email.Header.html

    >>> from email.Header import decode_header
    >>> decode_header('=?iso-8859-1?q?p=F6stal?=')
    [('p\xf6stal', 'iso-8859-1')]

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From radam2 at tampabay.rr.com  Sat Apr  2 07:50:07 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 12:50:07 GMT
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<1498066.d23UzBfE8y@yahoo.com>
	<mailman.1226.1112420537.1799.python-list@python.org>
Message-ID: <el4t41pvik9fs171p55420em3iq0u2trrk@4ax.com>

On Sat, 02 Apr 2005 00:40:15 -0500, Steve Holden <steve at holdenweb.com>
wrote:

>
>The danger in GOTO is that it allows the undisciplined programmer to 
>develop a badly-structured solution to a programming problem. A 
>disciplined programmer will write well-structured code with whatever 
>tools come to hand.
>
>regards
>  Steve

And how that becomes really clear when you want to modify a large
program that uses GOTOs librally.  


Ron



From mlernerNO at SPAMumich.edu  Wed Apr  6 00:18:58 2005
From: mlernerNO at SPAMumich.edu (Michael George Lerner)
Date: Wed, 06 Apr 2005 04:18:58 GMT
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
Message-ID: <SqJ4e.771$r6.203@news.itd.umich.edu>

Aahz <aahz at pythoncraft.com> wrote:

> Use vim.  80% of the power of emacs at 20% of the learning curve.

A system administrator said this to me about unix a long time ago,
but it applies equally well to emacs:

Emacs is a great place to live, but I'd hate to visit.

-michael, an (x)emacs user



From antonyliu2002 at yahoo.com  Tue Apr 19 23:05:48 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Tue, 19 Apr 2005 20:05:48 -0700 (PDT)
Subject: Importing some functions from a py file
In-Reply-To: 6667
Message-ID: <20050420030549.4214.qmail@web54508.mail.yahoo.com>

Hmm,thanks a lot.  I still don't quite get it.

So, instead of defining a main like

def main():
    do things here

I should do something like below in both modules?

if __name__ == "__main__":

    call the functions you defined here.


--- Michael Soulier <msoulier at gmail.com> wrote:
> On 4/19/05, Anthony Liu <antonyliu2002 at yahoo.com>
> wrote:
> > 
> > You are certainly right, because I don't know how
> to
> > protect the main functions.  Where do I put
> > 
> > if __name__ == '__main__': main()
> 
> I just glanced in the modules section of the python
> documentation and
> surprisingly this is not mentioned at all that I
> could see. I think
> that's an oversight.
> 
> See this example:
> 
>
http://diveintopython.org/getting_to_know_python/index.html
> 
> Mike
> 
> -- 
> Michael P. Soulier <msoulier at gmail.com>
> http://www.digitaltorque.ca
> http://opag.ca      python -c 'import this'
> Jabber: msoulier at digitaltorque.ca
> 

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From ishpeck at gmail.com  Wed Apr 27 10:19:03 2005
From: ishpeck at gmail.com (Ishpeck)
Date: 27 Apr 2005 07:19:03 -0700
Subject: Which IDE is recommended?
In-Reply-To: <1114608598.571508.6570@z14g2000cwz.googlegroups.com>
References: <426f90ac$1_2@rain.i-cable.com>
	<1114608598.571508.6570@z14g2000cwz.googlegroups.com>
Message-ID: <1114611543.156341.198870@o13g2000cwo.googlegroups.com>

Sorry about the empty post.

I'm a fan of PSPad.  It's free, light weight, and works with
everything.

http://www.pspad.com/



From aleksander.helgaker at gmail.com  Wed Apr 20 16:13:51 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 20 Apr 2005 13:13:51 -0700
Subject: building a small calculator
In-Reply-To: <mailman.2188.1114016953.1799.python-list@python.org>
References: <1113999497.480245.47240@g14g2000cwa.googlegroups.com>
	<mailman.2168.1113999910.1799.python-list@python.org>
	<1114000275.227950.50870@f14g2000cwb.googlegroups.com>
	<mailman.2171.1114000794.1799.python-list@python.org>
	<1114000897.084753.80950@l41g2000cwc.googlegroups.com>
	<mailman.2188.1114016953.1799.python-list@python.org>
Message-ID: <1114028031.426500.74850@z14g2000cwz.googlegroups.com>

Thats great info. Thanks.

I guess I would know about this if I read through all the manuals, but
I'm awefull at reading that kind of stuff. I'll just have to plow
through it somehow.



From dcrespo at gmail.com  Wed Apr 27 14:31:00 2005
From: dcrespo at gmail.com (dcrespo)
Date: 27 Apr 2005 11:31:00 -0700
Subject: PyGTK vs. wxPython
In-Reply-To: <mailman.2584.1114617214.1799.python-list@python.org>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<mailman.2580.1114613011.1799.python-list@python.org>
	<1114616192.342452.178720@o13g2000cwo.googlegroups.com>
	<mailman.2584.1114617214.1799.python-list@python.org>
Message-ID: <1114626660.172481.303090@z14g2000cwz.googlegroups.com>

Correct me if I'm wrong: XRCed doesn't allow to do MDI Parent and Child
frames, but simple apps only.
For what you wouldn't use it? And instead, what would you use instead?
GUI Hand coding?

Daniel



From davecook at nowhere.net  Sun Apr 10 10:26:09 2005
From: davecook at nowhere.net (Dave Cook)
Date: Sun, 10 Apr 2005 14:26:09 GMT
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
Message-ID: <slrnd5ids2.2nh.davecook@localhost.localdomain>

On 2005-04-09, flupke <flupke at nonexistingdomain.com> wrote:

> i create my GUIs mainly via wxGlade. However when you start of to 
> program and want to do some rearranging to the gui, wxglade overwrites 
> your file and you've got to put your own code back in.

How about generating XRC files instead of Python?  I admit I've never tried
it with wxGlade, so I don't know how well it works, but with the original
Glade one only uses XML, you can't generate Python at all.

Dave Cook


From tjreedy at udel.edu  Mon Apr  4 19:56:40 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 4 Apr 2005 19:56:40 -0400
Subject: sparse sets of integers?
References: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
Message-ID: <d2sv5b$en$1@sea.gmane.org>


"Dan Stromberg" <strombrg at dcs.nac.uci.edu> wrote in message 
news:pan.2005.04.04.21.52.58.910482 at dcs.nac.uci.edu...
>
> Does anyone have a python implementation (or python C/C+ extension) that
> would allow me to perform set operations (union, intersection, 
> difference,
> number of elements, &c) over very large collections of integers?
>
> Some of the sets may have over 10**11 (probably less than 10**13
> though) integers in them, but there will tend to be runs of integers 
> being
> included or not included, so there might be 10**5 consecutive integers
> included, then 10**4 that are not included, and then another 10**6 that
> are.

I would call this chunky rather than sparse.  Or a set (ordered list) of 
integer ranges, which I am sure is how you implemented it before.  I did 
not find anything Googling 'Python integer range set' but would look harder 
before coding.

Terry J. Reedy





From sandygarg at gmail.com  Thu Apr 14 03:07:00 2005
From: sandygarg at gmail.com (sandygarg at gmail.com)
Date: 14 Apr 2005 00:07:00 -0700
Subject: Printable version of Python tutorila
Message-ID: <1113462420.862936.132780@g14g2000cwa.googlegroups.com>

I liked the python tutorial (
http://www.python.org/doc/current/tut/tut.html ) very much.
Now i want to print this tutorial.
Where do i get a printable version of the document?



From superprad at gmail.com  Sat Apr 23 16:17:55 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 23 Apr 2005 13:17:55 -0700
Subject: Bounding box on clusters in a 2D list
Message-ID: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>

If I have

ex: x = [[1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0],
         [1,1,1,0,1,1,0,0,0,0,0,1,1,1,1,0,0,0],
         [1,1,1,0,1,1,1,0,1,1,0,1,1,1,0,0,0,0],
         [0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0]]
what I want is a boundingbox over the region where we find clusters of
1's.So for instance in the above list first 3 roes and colums have 1's
so the area of that box is 3x3
so my final array should have an array of approx areas of clusters of
1's like
area = [ 9,4 ....]
Hope I am clear with my question.



From bokr at oz.net  Mon Apr 18 23:31:17 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 03:31:17 GMT
Subject: pre-PEP: Suite-Based Keywords - syntax proposal
References: <mailman.2014.1113717992.1799.python-list@python.org>
	<1113720183.913168.184770@f14g2000cwb.googlegroups.com>
	<42621c83.157344138@news.oz.net>
	<1113755254.226237.138550@z14g2000cwz.googlegroups.com>
	<4262e25b.207992156@news.oz.net>
	<1113799727.299053.138010@f14g2000cwb.googlegroups.com>
Message-ID: <42634e5c.235641494@news.oz.net>

On 17 Apr 2005 21:48:47 -0700, "Kay Schluehr" <kay.schluehr at gmx.net> wrote:
<snip>
>> >
>> I like this. But how would you put "where args:" and "where kw:" if
>you needed both?
>> also, is it looking back to see the '*' or '**' to do (::x=1).values
>vs. (::x=1)
>> and how about (::x=1).keys() or (::x=1).items() ? And what if you
>wanted to pass
>> (::x=1) as a dict object without ** expansion into a keyword dict?
>>
>> Maybe we need asterisks on both ends. e.g.,
>>
>>     foo(dct, values, *args, **kw):
>>        where **dct:
>>           x=1
>>        where *values:
>>           x=2
>>        where *args:
>>           x=3
>>        where **kw:
>>           x=4
>
>Yes... Why not?

On second thought, "where **x:" might as well be "where x:" since ** is a good default,
but I think "where x:" looks too much like and ordinary suite will follow, rather than
capturing the bindings created by the suite and binding that dict to x temporarily.
I would rather see "where x::" to indicate that, which also ties in consistently with
my syntax for for thunks as suite expressions, in that that now gives named def-like
statement versions to all the anonymous versions, when you include this <name>::<suite>
along with <name>(<thunkarglist>):<thunksuite> and <name> def(<defarglist>):<anonymous_def_suite>

Of course that last is equivalent to an ordinary def, and I can't see using it, since a def will
do everywhere except immediately following where, and the assignment form is clearer there, e.g.:

    foo(123) where foo=def(x):
        print x

as a way to define a transient function and call it


so with that in mind, and I just realized we can do away with * specifiers
if we move that job to where the dict of bindings is used:

       foo(dct, values.values(), *args.values(), **kw):  #XXX ':' used as function call trailer not good
          where dct::     # get suite as dict in all cases
             x=1
          where values::
             x=2
          where args::
             x=3
          where kw::
             x=4

Now using the same syntax to define temporarily named thunks for the arg list:

       thunk_accepter(tk1, tk2, [1,2], **kw) where: # now where: can introduce an ordinary where suite
           tk1(i):
               print i
           tk2(j):
               rejectlist.append(j)
           kw::
               x = 1
               y = 2
 
This would be equivalent to     

       thunk_accepter(tk1, tk2, [1,2], **kw) where:
           tk1 = (i):
               print i
           tk2 = (j):
               rejectlist.append(j)
           kw = ::
               x = 1
               y = 2
      
Which might look more "mainstream", and be ok for multiple values, but for a single thunk,
which is probably the most frequent use case, a statement should be able to
end in  "where <single assignment or name binder>:" e.g.,

       foo(x) where x=1 # minimal silly

or named thunk definition syntax, which binds the name and uses a suite, e.g.,

       safe_open(tk, filepath, filemode) where tk(f):
           for line in f:
               print line[:40]

would be nice and concise. And it looks pretty mainstream, in that
tk(f) looks just like the thunk call that safe_open will do to run the suite
in the local namespace. Might even look good to Brian? ;-)

But note that "where tk(f):<suite>"  is really equivalent to the assignment form
"where tk = (f):<suite>" much like def foo(): return 'hi' is equivalent to foo = lambda: 'hi'
(and my thunk definition syntax derives from def foo(<arglist>):<suite> minus "def foo" ;-)

>
>>
>> But that still doesn't give you, e.g.,
>>
>>        foo(keys) where:
>>            keys=sorted((::
>>                from interesting.module import *
>>            ).keys())
>
>This particular statement won't work anyway inside a where-clause
>because
>"from *" must be called from module level. You would have to import
>interesting.module before:
>
>        import interesting.module
>        foo(keys) where:
>            keys = sorted(interesting.module.__dict__).keys()
>
>But it wasn't ever intended to put arbitrary statements in a kw-suite,
>right?
Sure, as arbitrary as inside a function. Import * was a bad example. I never use that,
so I shouldn't have used it in an example, even though on my system it does it, grudgingly:

 >>> def foo():
 ...     from math import *
 ...     return vars().keys()
 ...
 <stdin>:1: SyntaxWarning: import * only allowed at module level
 >>> foo()
 ['pow', 'cosh', 'ldexp', 'hypot', 'tan', 'asin', 'log', 'fabs', 'floor', 'sqrt', 'frexp', 'degre
 es', 'pi', 'log10', 'sin', 'modf', 'atan', 'ceil', 'sinh', 'cos', 'e', 'tanh', 'radians', 'atan2
 ', 'fmod', 'exp', 'acos']
 >>>

I should have put a safe import inside, using your example
         foo(keys) where:
             import interesting.module
             keys = sorted(interesting.module.__dict__).keys()

If you import it outside of that scope, you will have 'interesting' bound outside.

I'm not saying go wild and do weird things, I'm just saying don't impose arbitrary
restrictions on adults. These explorations are just to illustrate possibilities,
not to advocate them all as good conventional use.

>
>> I like clean sugar, but I still want to be able to
>> get at the general primitives to compose them in ways
>> that can't be anticipated until a use case comes up.
>> And then if the primitives are inaccessible, one is
>> out of luck or doomed to workaround hacking ;-)
>
>You can always consider "where" as function of a statement. The only
>restriction You have to make is to bind "where" to a function-call i.e.
>regard each function as a function object with a where() method.

Um, I think that's too narrow for where. Consider

    foo = f1; bar=f2; x=k1; y=k2
    foo(x)*bar(y)[3].attr

now should

    foo(x)*bar(y)[3].attr where:
        foo = f1; bar=f2; x=k1; y=k2

act any different? How do you spell this as a where bound to a function call?

>
>
>f(*args,**kw ).where( <specifier>,
>                        (<assignment-statement>|
>                         <function-definition>|
>                         <class-definition>)*
>                    )
>
>But that is not a loss of generality because a free (:: x=1 ) can be
>mapped onto
>
>  dict(**kw).where(**kw, x=1)
>
>and that is
>
>  dict(**kw) where **kw:
>       x=1


so for
    foo(*args) where:
        args = dict(**kw).keys() where **kw:
                                      x=1

but it's much easier (now with explorations and ideas above ;-) to write

    foo(*args.values()) where args::
        x=1

>
>I don't see any case where this translation fails. Only if it comes to
>functional composition like
>
>  f(g(...(h(:: x=1)...))
>
>it may be awkward to expand this into a nested where clauses. You might
>probably define the argument not in a suite ;)

There are probably some things that won't look reasonable no matter what ;-)

But to summarize, I think we should try to write a real grammar for all this,
and show how it would fit in with the real python grammar.

I think I should make a separate post for this ;-)
see
   grammar for where/letting/with and suite expressions (thunks etc)

   
Regards,
Bengt Richter


From ivanlan at pauahtun.org  Mon Apr 25 12:22:56 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Mon, 25 Apr 2005 10:22:56 -0600
Subject: Multiple tuples for one for statement
References: <1114398216.258027.105070@g14g2000cwa.googlegroups.com>	<200504251356.07715.james@wrong.nu>
	<426CF1D5.E9F4396@pauahtun.org>	<200504251457.28724.james@wrong.nu>
	<mailman.2456.1114437838.1799.python-list@python.org>
	<JoCdna5WP9b3Z_HfRVn-vA@powergate.ca>
Message-ID: <426D1960.B0B34905@pauahtun.org>

Hi All--

Peter Hansen wrote:
> 
> > Define "works":
> 
>  >>> a = (1,2,3)
>  >>> b = ('a','b','c')
>  >>> c = (None, 'foo', 3.14)
>  >>> tup1 = (1,2,3)
>  >>> tup2 = ('a','b','c')
>  >>> tup3 = (None, 'foo', 3.14)
>  >>> for a,b,c in (tup1,tup2,tup3):
> ...   print a
> ...   print b
> ...   print c
> ...
> 1
> 2
> 3
> a
> b
> c
> None
> foo
> 3.14
>  >>>
> 
> It's a valid interpretation of the OP's
> ambiguously stated requirements, though probably
> not the right one.
> 

I can see that now.  I had three hours sleep last night and my brain
hurts, so I don't get it.  I seek enlightenment.

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From long.in.the.tooth at gmail.com  Fri Apr 22 15:14:47 2005
From: long.in.the.tooth at gmail.com (long.in.the.tooth at gmail.com)
Date: 22 Apr 2005 12:14:47 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<mailman.1769.1113320562.1799.python-list@python.org>
	<1o31j2-7l6.ln1@home.rogerbinns.com>
	<425e0c46$0$8215$9b622d9e@news.freenet.de>
Message-ID: <1114197287.911807.280140@o13g2000cwo.googlegroups.com>

Just to add my voice to those suffering because of this issue...

For me the main problem is going to a two step install.  Also, it makes
my application much bigger.

Responding to earlier comments, you know what's really frustrating?  So
far, every pc which has failed to install my app has actually had a
copy of this dll someplace.  One is tempted to script the installer to
search for the thing and then copy it over. One wonders that the
install failure rate would be then.  BUT, this would still be an
unacceptable risk.  Nothing makes customers more angry than install
problems.

Bottom line:  If MS wants to support an open source programming
language, they have to do more than give away a tool chain.  They also
have to license their libraries in a compatible way.

Further, (well aware that as the recipeient of a free tool my
complaints might be properly dumped in the trash) if PDF wants to
distribute same, they need to ensure that users will be free to do
programming language type activities, like package and distribute
applications.

So I've got some time before I actually have to distribute, but I do
hope for a solution to this problem.

Thanks very much for all your hard work,

Sean Cavanagh



From michele.simionato at gmail.com  Sat Apr  2 01:14:27 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 1 Apr 2005 22:14:27 -0800
Subject: Translation review?
In-Reply-To: <fefcdfb7.0503312300.5477345c@posting.google.com>
References: <fefcdfb7.0503312300.5477345c@posting.google.com>
Message-ID: <1112422467.251986.61220@l41g2000cwc.googlegroups.com>

This is spectacular! :)
Is there a way to make it to work from environments (such as emacs)
where stdin is special?

              Michele Simionato



From michele.petrazzo at TOGLIunipex.it  Tue Apr 12 13:56:35 2005
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Tue, 12 Apr 2005 19:56:35 +0200
Subject: PyChart into web site error
Message-ID: <425c0b61$0$10969$5fc30a8@news.tiscali.it>

I'm using PyChart like a module for create charts into a little web
site, but when I try to create one, I have this error:

/var/www/html/lgt/draw.py:19, in draw:
can = canvas.init(self.file_name)
/usr/lib/python2.3/site-packages/pychart/canvas.py:60, in init:
can = pngcanvas.T(fname)
/usr/lib/python2.3/site-packages/pychart/pscanvas.py:25, in __init__:
basecanvas.T.__init__(self)
/usr/lib/python2.3/site-packages/pychart/basecanvas.py:70, in __init__:
self.title = re.sub("(.*)\\.py$", "\\1", sys.argv[0])

AttributeError: 'module' object has no attribute 'argv'

Why my script doesn't have sys.argv?

Is there another way to use PyChart into my script?

Thanks,
Michele


From tjreedy at udel.edu  Wed Apr 27 02:58:27 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 27 Apr 2005 02:58:27 -0400
Subject: Python internal design
References: <pan.2005.04.26.19.53.14.623507@ldre.Vanderbilt.Edu>
	<d4mq93$hb1$1@domitilla.aioe.org>
Message-ID: <d4ncsg$k7p$1@sea.gmane.org>


"Maurice LING" <mauriceling at acm.org> wrote in message 
news:d4mq93$hb1$1 at domitilla.aioe.org...
>> I am designing a tool, in which there are dynamic types and
>> variables with these types. In this respect, it is more like an
>> interpreted language design.
>>
>> I wonder how these issues are implemented in Python are there any
>> documents or articles about it, which I can read and get an idea.

There is no single doc other that the source, but lots of bits and pieces 
scattered thru clp archives.  The CPython interpreter, tokenizes, parses, 
and compiles Python to CPython bytecode.  The library manual chapter on the 
dis module defines the stack-based CPython virtual machine.  The bytecode 
is interpreted in a loop with a giant switch (ceval.c).  Python objects 
have a common header and a type-specific value section.  For builtin type 
objects, the value section is a standard set of slots for functions 
corresponding to the various operators and builtins.  For more, see the 
source or persistently search Google's archive for the group.

Terry J. Reedy





From __peter__ at web.de  Mon Apr 18 02:34:32 2005
From: __peter__ at web.de (Peter Otten)
Date: Mon, 18 Apr 2005 08:34:32 +0200
Subject: variables exist
References: <9622d535.0504110552.1e070e8d@posting.google.com>
	<Michael.J.Fromberger-39BE7B.18140717042005@localhost>
Message-ID: <d3vkda$g3g$02$1@news.t-online.com>

Michael J. Fromberger wrote:

> Would the following be a satisfactory implementation?
> 
>   def isset(varname, lloc = locals()):
>     return varname in lloc or varname in globals()
> 
> I believe this works as desired:
> 
>   >>> x = 5
>   >>> def f(y):
>   ...   z = 10
>   ...   print isset('z')   ## ==> True
>   ...   print isset('y')   ## ==> True
>   ...   print isset('x')   ## ==> True
>   ...
> 
> Tests:
>   >>> f(1)  ## As shown above

No, try it again in a fresh interpreter:

>>> def isset(name, loc=locals()):
...     return name in loc or name in globals()
...
>>> x = 5
>>> def f(y):
...     z = 10
...     print isset("x"), isset("y"), isset("z")
...
>>> f(42)
True False False
>>>

It may seem from the above that at least the global variable "x" is found
correctly, but beware, the global namespace where isset() is defined is
searched, not the one where it is called. Untested:

def isset(name):
    frame = sys._getframe(1)
    return name in frame.f_locals or name in frame.f_globals

might work, but is too magic for my taste.

Peter



From axel at white-eagle.invalid.uk  Tue Apr 12 19:31:08 2005
From: axel at white-eagle.invalid.uk (axel at white-eagle.invalid.uk)
Date: Tue, 12 Apr 2005 18:31:08 -0500
Subject: [perl-python] Python documentation moronicities (continued)
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <q5ednRaNl_yhx8HfRVn-3A@adelphia.com>

In comp.lang.perl.misc Xah Lee <xah at xahlee.org> wrote:
> The answer to the questions are resounding yeses, you fucking asses.
 
> paypal me a hundred dollars and i'll rewrite the whole re doc in a few
> hours.
 
> Fuck you the standard IT morons. Excuse me for i didn't have time to
> write a more coherent and detailed analysis of the stupidities of the
> re doc.
 
Don't worry! Very soon, some nice men in white coats will show you
a comfortable room with soft walls in which you can write such
documentation to your hearts content.

Axel



From tiissa at nonfree.fr  Wed Apr 20 16:49:21 2005
From: tiissa at nonfree.fr (tiissa)
Date: Wed, 20 Apr 2005 22:49:21 +0200
Subject: What's the difference between these 2 statements?
In-Reply-To: <d46e7k$ef4$05$1@news.t-online.com>
References: <70c4ec00.0504201052.30227e93@posting.google.com>
	<3cnmpbF6gnlkhU1@individual.net>
	<4266ad9f$0$14218$636a15ce@news.free.fr>
	<1114026007.999930.12850@f14g2000cwb.googlegroups.com>
	<d46bvt$2l9$01$1@news.t-online.com>
	<4266b7cf$0$7202$626a14ce@news.free.fr>
	<d46e7k$ef4$05$1@news.t-online.com>
Message-ID: <4266c050$0$2099$626a14ce@news.free.fr>

Peter Otten wrote:
> Still, for practical purposes you have to test for slicelen >= stringlen, so
> whether you choose None, -len(s)-1, or -sys.maxint as the second slice
> parameter doesn't matter much.

Sure, for practical purposes you don't bother to write extra characters 
and leave it void.
But we knew it from the start of the thread. ;)


From jack at performancedrivers.com  Fri Apr  8 15:46:35 2005
From: jack at performancedrivers.com (Jack Diederich)
Date: Fri, 8 Apr 2005 15:46:35 -0400
Subject: Equivalent string.find method for a list of strings
In-Reply-To: <d36hnj$6h6$1@sea.gmane.org>
References: <d36hnj$6h6$1@sea.gmane.org>
Message-ID: <20050408194635.GD14375@performancedrivers.com>

On Fri, Apr 08, 2005 at 02:17:32PM -0400, jeremit0 wrote:
> I have read a text file using the command
> 
> lines = myfile.readlines()
> 
> and now I want to seach those lines for a particular string.  I was 
> hoping there was a way to "find" that string in a similar way as 
> searching simply a simple string.  I want to do something like
> 
> lines.find.('my particular string')
> 
> Is there a module that already exists that allows me to do this or will 
> I have to created my own method?

def search(line):
  return 'my string' in line
lines = filter(search, myfile.readlines())

if you are using python2.4, use a generator expression so it won't make
a list the size of the whole (possibly large?) file.

for (matching_line) in (line for (line) in myfile if ('my string' in line)):
  # do something


-jackdied


From paul at fxtech.com  Thu Apr 28 17:20:13 2005
From: paul at fxtech.com (Paul Miller)
Date: Thu, 28 Apr 2005 16:20:13 -0500
Subject: embedding an interactive console
In-Reply-To: <n3bce.1944$dl5.384@fe58.usenetserver.com>
References: <n3bce.1944$dl5.384@fe58.usenetserver.com>
Message-ID: <xrcce.6498$687.1669@fe57.usenetserver.com>

Paul Miller wrote:
> I note the documentation for InteractiveConsole, which is implemented in 
> Python. Is there any example code for using this from within C/C++ code 
> to emulate the command-line interpreter inside a GUI app?

I've gotten my text edit widget to send InteractiveConsole strings to 
run and can see the results.

But I'm not getting a >>> prompt consistently.

I'd love to see some sample code from anyone who is using this with an 
embedded interpreter.



From tjreedy at udel.edu  Mon Apr 25 11:59:24 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 25 Apr 2005 11:59:24 -0400
Subject: bytecode non-backcompatibility
References: <d4frsf$ku$1@domitilla.aioe.org>
	<1114418065.581779.52480@l41g2000cwc.googlegroups.com>
Message-ID: <d4j3r7$qva$1@sea.gmane.org>

I think the OP is confusing three different CPython implementation 
features -- bytecodes, marshal format, and C API, all of which change 
pretty slowly -- and a MS Windows/C (dis)feature.

CPython bytecodes only concern code written in Python but are mostly not a 
concern because recompilation is automatic when needed.  The exception is 
code that directly mucks around with bytecodes, especially the intentially 
semi-undocumented numerical codes.

Code objects also include marshaled object values.  The code object for 
'haha = 987654321' must contain representations for the constants 'haha' 
and '987654321' as well as the bytecode for the assignment.  So even if 
bytecodes remain the same, marshal can change (as it did for 2.4, I 
believe, and as it will for floats in 2.5 to fix a bug) and trigger auto 
recompiles.

C extensions interact with the interpreter via function calls that 
constitute the C API.  As much as possible, the developers consciously 
avoid changes that break old code or even old binaries.  Guido has claimed 
that for Linux, there are extension binaries compiled for 2.0 that still 
work with 2.4.

However, for MS Windows/C, there is a 'feature' with respect to DLLs that 
requires recompilation of extensions to work with a new version of the 
Python DLL, even if the C API is unchanged (or so people who understand 
this have said).  So the OPs complaint about having to get and install new 
extension binaries for each Python version might well be directed to MS.

This does not, of course, negate the idea that it would be nice if the 
update process were somehow make easier.  Indeed, the more-batteries 
included distributions from ActiveState and Enthought specifically aim at 
this.

Terry J. Reedy





From ivanlan at pauahtun.org  Fri Apr  8 09:13:48 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Fri, 08 Apr 2005 07:13:48 -0600
Subject: curious problem with large numbers
Message-ID: <4256838C.18420722@pauahtun.org>

Hi All--
Windows XP, uwin running on Athlon XP 3000+:

0 [/c/users/ivanlan][1] python
Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> 1e10000
1.#INF
>>>

Metta,
Ivan

Michael Spencer wrote:
> 
> > A further Windows data point from Cygwin:
> >
> > Python 2.4 (#1, Dec  4 2004, 20:10:33)
> > [GCC 3.3.3 (cygwin special)] on cygwin
> > Type "help", "copyright", "credits" or "license" for more information.
> >  >>> 1e10000
> > Inf
> >  >>>
> >
> > regards
> >  Steve
> I guess the behavior is also hardware-dependent.  FWIW, I tested on an Athlon XP
> box.
> 
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From steve at holdenweb.com  Wed Apr  6 10:28:15 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 06 Apr 2005 10:28:15 -0400
Subject: ignoring keywords on func. call
In-Reply-To: <1112791176.258876.200160@o13g2000cwo.googlegroups.com>
References: <1112787673.095411.266170@o13g2000cwo.googlegroups.com>	<mailman.1424.1112788617.1799.python-list@python.org>
	<1112791176.258876.200160@o13g2000cwo.googlegroups.com>
Message-ID: <d30rhh$ing$1@sea.gmane.org>

Brano Zarnovican wrote:
>>>Q: Can you call 'f' with keywords that will be
>>> ignored, without changing 'f's definition ?
>>
>>no.
> 
> 
> OK. Thank you for an answer.
> 
> 
>>what's the use case?
> 
> 
> I have extended the dict class, so that my __getitem__ accepts an
> optional parameter
> 
[...]
> 
> But it still doesn't guarantee that __getitem__ accepts keywords.
> (What if somebody will extend the Tree class and overlook the
> definition of __getitem__ and define a "classic" one)
> 
Then they haven't programmed to your API, and deserve to be rewarded 
with an error message - it's the only way they can be informed they 
aren't writing to your standard, surely?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From codecraig at gmail.com  Fri Apr 15 07:57:14 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 04:57:14 -0700
Subject: Python - interpreted vs compiled
Message-ID: <1113566234.343746.48460@o13g2000cwo.googlegroups.com>

Hi,
  I have a question about Python.  I know that it is an interpreted
language, meaning a python program is converted to binary on the fly
each time it is run, or compiled.
  What would be the purpose of compiling?  I guess the compiled python
code (question, is compiled python code called byte code?..if not, what
is it called?) is not readable since it is not plain text, which may be
a reason for compiling...but why else??

Thanks.



From stefan.eletzhofer at eletztrick.de  Wed Apr 13 15:07:53 2005
From: stefan.eletzhofer at eletztrick.de (stefan.eletzhofer at eletztrick.de)
Date: Wed, 13 Apr 2005 21:07:53 +0200
Subject: are DLLs needed to run glade interfaces in python with Windows?
In-Reply-To: <9cac1d03.0504131058.451438a6@posting.google.com>
References: <9cac1d03.0504131058.451438a6@posting.google.com>
Message-ID: <20050413190753.GG24671@tier.local>

On Wed, Apr 13, 2005 at 11:58:12AM -0700, Fernando wrote:
> Hi,
> I've a .glade file with a little interface I made. I've managed to
> load it from a python script, using pyGTK, but the only way it succeed
> was copying into the same directory the "libxml2.dll" and
> "libglade-2.0.0.dll" files.
> 
> I think you only need to install theese as packages in Linux, but I'm
> using Windows and I'm wondering if this is a must using it, or if
> there are ways much cleaner that simply start dropping DLLs inside the
> directory...

IMHO that's actually the _only_ sane way on windows to deploy DLLs. The
other option you have is to put them in %SYSTEM32% or whatever environment
variable it was on that platform. But once you start to drop DLLs _outside_
your App's install directory, you _can't_ simply move the installation directory
somewhere else (read: another computer).

Hope that helps,
Stefan

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

-- 
Stefan Eletzhofer
InQuant Data GbR
http://www.inquant.de
http://www.eletztrick.de


From rschroev_nospam_ml at fastmail.fm  Fri Apr 15 09:17:36 2005
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 15 Apr 2005 13:17:36 GMT
Subject: Using python from a browser/security hole
In-Reply-To: <ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
	<ORC7e.2297$VA3.2046@newssvr30.news.prodigy.com>
Message-ID: <Q9P7e.65416$Bm2.4488309@phobos.telenet-ops.be>

Philippe C. Martin wrote:

> Since I need to access a local/client device from the page and that I wish
> to be cross-platform; does that mean Java is my only way out ?

Or you could try Jython (http://www.jython.org/).

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From peufeu at free.fr  Fri Apr 15 12:18:12 2005
From: peufeu at free.fr (peufeu at free.fr)
Date: Fri, 15 Apr 2005 18:18:12 +0200
Subject: Is Python appropriate for web applications?
References: <op.so85a1bgr3xrds@sony> <425fbed1$0$10366$636a15ce@news.free.fr>
Message-ID: <op.so97kmdnpda12i@localhost>



> The first one was a typo in the name of a variable ($actegories instead  
> of $categories). Instead of raising an exception, this b**d "programming  
> language" (err...) just created a new variable with a NULL value. Doh :-(

	Set error reporting to all.
	Marvel at how it reports this simple typo in a clear and easy to  
understand way.
	Then notice it also gives you a million warnings for a lot of valid stuff  
in your code.
	Cry.

> The second one was about array concatenation/union. I had used the "+"  
> operator instead of the array_merge() function.

	My favourite is array_key_exists(). Without looking at the docs, can you  
tell me the order of the parameters ?

>
> Read the PHP doc about the "+" operators for arrays and the  
> array_merge() function (don't forget that PHP uses the same construct  
> for arrays and mappings - doh). Then imagine yourself programming PHP,  
> and ask yourself if you'll really develop faster with such a braindead  
> quick&dirty hack for language.
> </rant>
>
> PHP-is-VB-for-the-web-ly'yrs



From Scott.Daniels at Acm.Org  Sat Apr  2 07:38:37 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sat, 02 Apr 2005 04:38:37 -0800
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
In-Reply-To: <Vrv3e.133894$dP1.471335@newsc.telia.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>	<pan.2005.04.01.15.50.51.219430@jerf.org>	<iUe3e.21015$d5.156054@newsb.telia.net>	<mailman.1192.1112376393.1799.python-list@python.org>	<d2kqqt$ss7$1@panix2.panix.com>	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
Message-ID: <424e8d1d$1@nntp0.pdx.net>

Sunnan wrote:
> ...Because what is "boring"? The opposite of dense, tense, intense. Utterly 
> predictable; it's like the combination of all my prejudices. Even before 
> I knew, I thought "Bet Python separates statements from expressions".

Python is for terse, pithy prose; Python is not for poetry.

--Scott David Daniels
Scott.Daniels at Acm.Org


From fperez.net at gmail.com  Tue Apr 12 13:32:44 2005
From: fperez.net at gmail.com (Fernando Perez)
Date: Tue, 12 Apr 2005 11:32:44 -0600
Subject: IPython - problem with using US international keyboard input
	scheme on W2K
References: <3bv5mgF6jbil9U1@individual.net>
	<1113323786.737140.184800@o13g2000cwo.googlegroups.com>
Message-ID: <d3h0i2$bnr$1@sea.gmane.org>

Michele Simionato wrote:

> Me too :-(
> I have already submitted my issues with the Italian keyboard
> on WinXP with no great success. It works on Linux, but this
> is not of a big help since my plan was to use ipython -p pysh on
> Windows as a replacement of the shell :-(

Bummer.  I wonder, if the changes are minor and easy, perhaps you (or someone
else) could offer Gary to take over maintenance of readline/win32?  It sounds
like he is perhaps too busy to keep up with the patches and improvements, so
perhaps it's time for someone else to take over?  That kind of library, while
very useful, shouldn't require too much future maintenance once the remaining
bugs are ironed out.  After all, it's just meant to expose under Win32 the
default GNU readline functionality, so there is not much 'new stuff' to do
there, and once it works correctly (which I think it's currently very close to
doing), not much else should be needed.

Just a thouhgt...

Best,

f



From olaamigoquepasa at hotmail.com  Thu Apr 21 20:28:35 2005
From: olaamigoquepasa at hotmail.com (hawkesed)
Date: 21 Apr 2005 17:28:35 -0700
Subject: Dictionary question.
In-Reply-To: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
Message-ID: <1114129715.038945.227200@o13g2000cwo.googlegroups.com>

Actually,
  I think I got it now. Here is what I did:
>>> for num in alist:
... 	if adict.has_key(num):
... 		x = adict.get(num)
... 		x = x + 1
... 		adict.update({num:x})
... 	else:
... 		adict.update({num:1})
...
>>> adict
{128: 2, 129: 2, 132: 1, 153: 1, 30: 1, 53: 1, 57: 1, 61: 1, 66: 2, 67:
1, 69: 2, 71: 1, 72: 1, 73: 2, 74: 1, 75: 2, 76: 2, 77: 2, 78: 2, 82:
1, 84: 1, 85: 4, 87: 2, 88: 3, 89: 1, 91: 1, 92: 1, 93: 2, 94: 2, 95:
3, 96: 1, 97: 3, 98: 2, 99: 1, 100: 6, 101: 4, 102: 2, 103: 1, 104: 1,
105: 1, 106: 2, 107: 2, 108: 2, 109: 2, 111: 3, 112: 1, 114: 3, 115: 3,
116: 3, 118: 1, 119: 2, 122: 2, 123: 1, 125: 1, 126: 1}
Thanks all for the help and best regards!
Ed



From heiko.selber at siemens.com  Tue Apr 19 06:12:06 2005
From: heiko.selber at siemens.com (Heiko Selber)
Date: Tue, 19 Apr 2005 12:12:06 +0200
Subject: Name/ID of removable Media: how?
Message-ID: <d42lho$fbf$1@news.mch.sbs.de>

I am trying to find out (using Python under windows) the name of a CD that
is currently in the drive specified by a path name.

And while I am at it, I'd also like to know whether the specified drive
contains a CD at all, and whether the drive is actually a CD drive.

AFAIK, Python doesn't provide a way to do it, and a search in the web
yielded only soutions for Linux.

Can anyone show me a solution that works with windoze?

TIA,

Heiko




From deetsNOSPAM at web.de  Fri Apr  8 12:27:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Fri, 08 Apr 2005 18:27:49 +0200
Subject: Can dictionary values access their keys?
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
	<d369dj$9vs$04$1@news.t-online.com>
	<d369vh$rpb$1@vegh.ks.cc.utah.edu>
Message-ID: <d36be5$e8o$04$1@news.t-online.com>

Matthew Thorley wrote:

> Can you please elaborate on this?

Eh, just have two dicts that are the inverse of each other. You could do
that by subclassinc dict:

class mydict(dict):
    def __init__(self):
        self.__inverse_mapping = {}

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


    def key4value(self, v):
        return self.__inverse_mapping[v]


But of course this only works if your mapping is bijective. Consider this:

d = mydict()
d[10] = 20
print d.key4value(20)
d[15] = 20
print d.key4value(20)

This will of course not give you (10,15), but 15 only - the last mapping
overwrites earlier ones. And beware of non-hashable objects like lists or
dicts themselves, they aren't working as keys. So this produces an error:

d[100] = [1,2,3,4]
TypeError: list objects are unhashable





-- 
Regards,

Diez B. Roggisch


From gsakkis at rutgers.edu  Sat Apr  9 14:22:06 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 9 Apr 2005 11:22:06 -0700
Subject: Puzzling OO design problem
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>
	<20050409082128.A3E.0.NOFFLE@dthierbach.news.arcor.de>
	<20050409142843.26D9.0.NOFFLE@dthierbach.news.arcor.de>
Message-ID: <1113070926.355501.147880@f14g2000cwb.googlegroups.com>

> On second thought, I had doubts. Consider the following scenario:
>
>    A2 | f   <-   A3
>    ^             ^
>    |             |
>    B2 | f   <-   B3
>    ^             ^
>    |             |
>    C2       <-   C3 | g
>
> Assume g calls f. Since f is defined in B version 2, it should taken
> over unchanged into B version 3, and that should be the version g
> calls. However, with multiple inheritance doing depth-first search,
> giving the "upper" class priority over the "left", the first path
> searched is B3 - A3 - A2, and hence it finds f at A2. A quick test
> confirms this for old-style classes, which failed in exactly that
> way. But with new-style classes, it works, and finds f at B2 instead.
>
> So I dug through the documentation and found that new-style classes
> compute a monotonic linearization of the inheritance graph, observing
> local precedence order, using the algorithm also used in Dylan
> described here:
>
> http://www.webcom.com/haahr/dylan/linearization-oopsla96.html

That's right; you can actually access this linearization for new-style
classes by the '__mro__' class atrribute. See my example in the main
subthread of this thread that uses __mro__ to illustrate the need for
the dummy intermediate classes.

> And this algorithm will even work correctly if one leaves out B3
> in the example above, inheriting directly as in C3(A3,C2), because
> the ordering constraint that A2 comes before B2 will still be
> valid in the linearization for C3.
>
> However, in the following case (shortening the notation even more)
> it will fail, if a method defined at C3 is looked up at D4:
>
>    A1 - A2 - A3 - A4 - ...
>    |    |    |    |
>    B1 - B2 - +  - B4 - ...
>    |    |    |    |
>    C1 - +  - C3 - +  - ...
>    |    |    |    |
>    D1 - D2 - +  - D4 - ...
>    |    |    |    |
>
> The solution is simply to include C3 in the list of parents of D4, as
> in D4(C3,B4,D2). So for every hole in a column, you have to include
> the first class (or classes, if the hole spans multiple rows) to the
> left of the hole as parents if the class just below the hole, in
order
> from bottom to top. This adds the missing constraints, and should
> solve the problem without any need to write __metaclass__ stuff.

Nice. I had taken for granted that you need to fill in the holes
(D3,B3,C2), either manually or automa[tg]ically, but if you allow a
class to inherit from more than two bases, you can pick a set of
parents that does the job, without any boilerplate code or
__metaclass__ magic. The downside of this approach is that it's even
harder to see the big picture, as in the schematic notation above;
remember that each column is a different version that resides in a
separate module, so it's not obvious which classes should be the
parents of each variation. Another drawback in the general case is ease
of maintenance: if a new hole appears in the future or an old hole is
filled, you have to go back and change the parents of the affected
classes. In my case this is not an issue though; old versions are
'frozen', so the only expected change in the lattice is the addition of
new columns (versions).

> Interesting question. I learned a lot while thinking about that.
>
> - Dirk

I learned too, and I'm glad for this learning side-effect :-) Thanks !

George



From steven.bethard at gmail.com  Mon Apr 11 14:27:58 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 11 Apr 2005 12:27:58 -0600
Subject: Doubt regarding sorting functions
In-Reply-To: <1113198242.860647.69530@o13g2000cwo.googlegroups.com>
References: <mailman.1663.1113195016.1799.python-list@python.org>
	<1113198242.860647.69530@o13g2000cwo.googlegroups.com>
Message-ID: <x6adncl4ebEzXMffRVn-jg@comcast.com>

ajikoe at gmail.com wrote:
> def funcSort(myList):
>   result = myList[:]
>   result.sort()
>   return result

In Python 2.4, funcSort is called sorted:

py> sorted([1.2,1.23,4.5,2])
[1.2, 1.23, 2, 4.5]
py> sorted(["a","c","b","A","C","B"])
['A', 'B', 'C', 'a', 'b', 'c']

STeVe


From RonGrossi  Thu Apr 21 11:58:03 2005
From: RonGrossi (RonGrossi)
Date: 21 Apr 2005 10:58:03 -0500
Subject: =?iso-8859-1?q?Good_morning_or_good_evening_depending_upon_yo?=
 =?iso-8859-1?q?ur_location=2E_I_want_to_ask_you_the_most_important_questi?=
 =?iso-8859-1?q?on_of_your_life=2E_Your_joy_or_sorrow_for_all_eternity_dep?=
 =?iso-8859-1?q?ends_upon_your_answer=2E_The_question_is=3A_Are_you_saved?=
 =?iso-8859-1?q?=3F_It_is_not_a_question_of_how_good_you_are=2C_nor_if_you?=
 =?iso-8859-1?q?_are_a_church_member=2C_but_are_you_saved=3F_Are_you_sure_?=
 =?iso-8859-1?q?you_will_go_to_Heaven_when_you_die=3F_GOOGLE=B7NEWSGROUP?=
 =?iso-8859-1?q?=B7POST=B7146?=
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
Message-ID: <80jf61d89lccsd5j8otesssamm93ecni5i@4ax.com>

Reports to groups-abuse at google.com, abuse at aol.net, domains at aol.net


From richardblackwood at cloudthunder.com  Sun Apr 24 22:45:07 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sun, 24 Apr 2005 22:45:07 -0400
Subject: Variables
In-Reply-To: <200504241043.07897.jstroud@mbi.ucla.edu>
References: <426B0283.40602@cloudthunder.com>
	<d4f9n1$fah$1@sea.gmane.org>	<426B2DB2.7080005@cloudthunder.com>
	<200504241043.07897.jstroud@mbi.ucla.edu>
Message-ID: <426C59B3.7000305@cloudthunder.com>

James Stroud wrote:

>On Saturday 23 April 2005 10:25 pm, so sayeth Richard Blackwood:
>  
>
>>Unfortunately that's not much of an option for me. We are working on a
>>project together so I am forced to either prove his notion incorrect or
>>I give in to his conception. *throws hands in air*
>>    
>>
>
>This is a communcication issue. You guys probably need a relationship couselor 
>or something. I think you should both agree on a common vocabulary and use 
>that. Usually the "bigger" individual makes the most concessions in these 
>areas, but then the "bigger" individual is usually meant for greater 
>callings.
>
>James
>
>  
>
*laugh* Intriguing suggestion...but what defines a "bigger" individual?


From wschneider at ra.rockwell.com  Mon Apr 11 08:43:38 2005
From: wschneider at ra.rockwell.com (wschneider at ra.rockwell.com)
Date: 11 Apr 2005 05:43:38 -0700
Subject: How to pass a runtime license key to CreateControl()
Message-ID: <1113223418.704399.235020@l41g2000cwc.googlegroups.com>

Hi

I have a problem with passing a runtime license key for an ActiveX
control to the method CreateControl() of the class
pywin.mfc.activex.Control.

Can anybody give me a hint in which form the license key string must be
passed to this method?

I got the license key for the ActiveX control using the "License Key
Requester" from Microsoft and I used the string given as comment above
the WCHAR array (since I don't know how to convert the WCHAR array for
Python).

But when creating the control with this string, the control is created
in "evaluation mode" and not, as expected, as a licensed control.

I looked up the code for the CreateControl() method and found out, that
it passes the license key string directly to the CreateControl() of the
PyCWnd class (the Python wrapper for the CWnd class of MFC). Than I
looked at the Python extension, where the PyCWnd::CreateControl() is
implemented, and found, that the macro T2OLE is used to convert the
given Python string for the license key to an OLE string, before
passing it to the original MFC method.

ok = pWnd->CreateControl(clsid, szWndName, style, rect, pWndParent, id,
NULL, bStorage, T2OLE(szLicKey));

I'm not sure, but when I understand this right, the MFC method
CreateControl() wants a BSTR here and I read somewhere that T2OLE does
not return a BSTR. Can this be the problem here?

Has anybody ever used the license key string parameter of the
CreateControl() method in Python and can tell my how to pass the
license key string correctly?

Thanks in advance.

Wolfgang Schneider



From peter at engcorp.com  Fri Apr 22 10:10:48 2005
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 22 Apr 2005 10:10:48 -0400
Subject: goto statement
In-Reply-To: <116fhpmid1q0j2b@corp.supernews.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com>
Message-ID: <HOadnbUkd5d_mPTfRVn-og@powergate.ca>

Grant Edwards wrote:
> Sure, but what about the case where his program is on paper
> tape and all he has for an editor is an ice pick?

Paper tape?  Luxury....


From harlinseritt at yahoo.com  Fri Apr 29 21:28:24 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 29 Apr 2005 18:28:24 -0700
Subject: Killing process
In-Reply-To: <4272df20$1_2@127.0.0.1>
References: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>
	<4272df20$1_2@127.0.0.1>
Message-ID: <1114824504.590998.63570@l41g2000cwc.googlegroups.com>

Yeah I've kind of figured that. I was just wanting to know what I could
use to kill a pid that is a string value. Thanks though.

Harlin



From raghulj at gmail.com  Tue Apr  5 01:21:00 2005
From: raghulj at gmail.com (Raghul)
Date: 4 Apr 2005 22:21:00 -0700
Subject: copying a file in the python script
Message-ID: <1112678460.464474.82610@z14g2000cwz.googlegroups.com>

hi
   I am having a problem. I want to copy a file from the folder and
paste it or move it to another folder. Is it possible in python?
Actually I need to implement this in the zope for my site. When I click
any file it should move or copied to another folder in the same machine
using zope.

Thanks in advance.



From jjl at pobox.com  Fri Apr 22 16:26:51 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 20:26:51 +0000
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<116iir4hq8muc62@corp.supernews.com>
	<mailman.2300.1114197628.1799.python-list@python.org>
Message-ID: <87wtqulfqs.fsf@pobox.com>

"R. C. James Harlow" <james at wrong.nu> writes:

> On Friday 22 April 2005 20:07, Grant Edwards wrote:
> 
> > I've never tried Qt.
> 
> Qt, in my opinion, is as excellent as python in the consistency stakes, has 
> the best documentation bar none, an excellent set of python bindings, the 
> best free layout tool, and an active and helpful community.

Qt's technical superiority is unchallenged (pretty much). 


> The killer, of course, is that there's no free windows port, so if you're 
> doing free software that you want to run on linux then you're stuffed.

Soon to change: Qt 4 for Windows (and the corresponding PyQt) will be
available under the GPL.  Dunno when Qt 4 is scheduled for though.  I
wonder if BlackAdder will carry on with roughly similar price and
licensing with Qt 4?

Also, somebody outside Trolltech was also doing a port of Qt 3 GPL to
Windows which apparently got quite a long way.  Whether that effort
continues, and whether PyQt will support that 'unofficial' port, I
don't know (not sure TT are hugely happy about the port, so perhaps
PyQt's author - Phil Thompson - respecting the people at TT as I'm
sure he does, won't support it).

Poor old Phil Thompson is fated to answer the same licensing questions
forever, though - an activity I suspect he dislikes even more than GUI
application programming <wink>


John


From neuhauser+python-list#python.org at sigpipe.cz  Sat Apr 23 15:01:42 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Sat, 23 Apr 2005 21:01:42 +0200
Subject: Python or PHP?
In-Reply-To: <426A534D.1080002@mage.hu>
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<426A534D.1080002@mage.hu>
Message-ID: <20050423190142.GA78460@isis.sigpipe.cz>

# mage at mage.hu / 2005-04-23 15:53:17 +0200:
> Lad wrote:
> 
> >Is anyone capable of providing Python advantages over PHP if there are
> >any?
>  
> I am also new to python but I use php for 4 years. I can tell:
> 
> - python is more *pythonic* than php
> - python has its own perfume
> http://www.1976.com.tw/image/trussardi_python_uomo.jpg  and it's nice.
> php doesn't have any smell
> - writing python programs you feel much better

    No, *you* feel better. :)
 
> check this: http://wiki.w4py.org/pythonvsphp.html

    The comparison found there is biased, the author is a Python
    partisan.

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From jerf at jerf.org  Sat Apr  9 17:20:45 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Sat, 09 Apr 2005 17:20:45 -0400
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
	<d3955k$kne$00$1@news.t-online.com>
Message-ID: <pan.2005.04.09.21.20.39.130792@jerf.org>

On Sat, 09 Apr 2005 19:59:18 +0200, Diez B. Roggisch wrote:

>> why use data files when you have an extremely powerful programming
>> language in your toolbox?  the advantage of building UI's in Python is
>> that you can quickly create "domain specific UI languages", and use them
>> to generate the interfaces for you.  UI editors may be useful for trivial
>> applications, but if you're doing complex stuff, you sure want domain-
>> specific abstractions.  Python gives you that, XML files don't.
> 
> If you do some creative rearranging of widgets and play around with
> different layouts and geometry managers, a good gui-designer becomes very
> useful.

Domain-specific abstractions do that *faster* than GUI designers, not
slower. And better, too, since every iteration tends to be fully
functional and not just a "let's see what this looks like" prototype.

Heck, switch 'em out dynamically based on what day of the week it is and
how the user feels today. Let's see your GUI-designer do that.

And if you're not used to doing it that way, you'll be *stunned* at how
much stuff tends to factor out and get easily re-used.

An approach that has more data to work with (some idea of what things are
doing and what they are for) will beat an approach with less data ("thing
at row 4, col 2" or, worst case, "thing at 233,144") any day.

GUI designers are like the regexs in the famous jwz quote: "Some people,
when confronted with a problem, think 'I know, I'll use a GUI designer'.
Now they have two problems." Both have a niche in the "quick fix"
department, both are typically over-used, but overall regexs are the more
useful of the two; at least there are cases where they are the undisputed
right answer (like defining tokens in a language parser).

Generally, over the first couple of weeks of a project, the
domain-specific language writer may seem to be behind the GUI designer
cranking out screen after screen of templated GUI widgets, but after a
couple of weeks the domain-specific language user will pull into the lead
and never give it up, and will be a lot happier to boot.


From smitty_one_each at bigfoot.com  Mon Apr 18 22:27:59 2005
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Mon, 18 Apr 2005 22:27:59 -0400
Subject: Wrapping C++ Class Heirachy in Python
References: <d419gb$r67$1@pump1.york.ac.uk> <d41aau$8o5$03$1@news.t-online.com>
Message-ID: <umzrvo5zk.fsf@bigfoot.com>

>>>>> Diez B Roggisch <deetsNOSPAM at web.de> writes:

    >> PyType_Ready but in Python the base class isn't recognised. Is
    >> there anything obvious I'm missing?

    > Maybe - I'd go for one of the several available python wrapper
    > generators. I personally had good experiences with SIP. But you
    > might also try boost python or SWIG.

    > The python C-API is great - for C. For C++, use one of the
    > above.  -- Regards,

    > Diez B. Roggisch
http://boost.org/libs/python/doc/index.html might meet the
requirements.
R,
C


From mahs at telcopartners.com  Sat Apr  9 12:13:28 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 09 Apr 2005 09:13:28 -0700
Subject: Puzzling OO design problem
In-Reply-To: <1113043759.765568.9920@o13g2000cwo.googlegroups.com>
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>	<mailman.1593.1113005609.1799.python-list@python.org>	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>	<mailman.1596.1113015264.1799.python-list@python.org>	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>	<mailman.1607.1113039130.1799.python-list@python.org>
	<1113043759.765568.9920@o13g2000cwo.googlegroups.com>
Message-ID: <d38uq2$qpo$1@sea.gmane.org>

George Sakkis wrote:
> 
> Nice try, but ideally all boilerplate classes would rather be avoided
> (at least being written explicitly). 

It depends on how much magic you are prepared to accept; this goal is somewhat 
in conflict with the next one...

Also, it is not obvious in your
> solution why and which placeholder classes have to be written (like
> World2.Movable) and which do not. 

It is systematic, if not obvious.  You need place holder classes only if you 
need to propagate new methods within a given world.  More magic would make this 
even less obvious.

By the way, my current working
> solution involves copying and pasting verbatim these classes :-) 


It appears to be basically the same as mine except you spell out the previous 
version explicitly (not that that's bad!)

Have you considered a 'macro' solution composing source?  If I were handling so 
many versions, I would want a complete class definition for each version rather 
than having to scan many sources for each implementation.

Michael



From greg at cosc.canterbury.ac.nz  Wed Apr 13 23:50:52 2005
From: greg at cosc.canterbury.ac.nz (Greg Ewing)
Date: Thu, 14 Apr 2005 15:50:52 +1200
Subject: The convenient database engine for a "Distributed" System
In-Reply-To: <1113254288.660746.174140@z14g2000cwz.googlegroups.com>
References: <1113253060.465083.110780@f14g2000cwb.googlegroups.com>
	<op.so26f4jjqfv3if@localhost>
	<1113254288.660746.174140@z14g2000cwz.googlegroups.com>
Message-ID: <3c67l9F6j2q6gU1@individual.net>

Grig Gheorghiu wrote:
> I also recommend Firebird. I like the fact that the database is in its
> own file that can be copied from one platform to another.

Although you can only do that between platforms having
the same byte order. Backing up and restoring is a more
reliable way to do cross-platform database copying.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg


From trentm at ActiveState.com  Tue Apr 26 15:46:25 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Tue, 26 Apr 2005 12:46:25 -0700
Subject: Komodo syntax checking for python2.4
In-Reply-To: <1114540510.452834.64330@f14g2000cwb.googlegroups.com>
References: <1114540510.452834.64330@f14g2000cwb.googlegroups.com>
Message-ID: <20050426194625.GC31597@ActiveState.com>

[George Sakkis wrote]
> I downloaded the latest Komodo (3.1) and configured it for python 2.4
> so that it doesn't show decorators and genexps as syntax errors, but
> background syntax checking doesn't seem to work at all for python 2.4.
> Even for correct files, it shows a "Syntax checking error: Error
> checking syntax: retval = 128, stderr=" alert. For python 2.3 it works
> fine (modulo the new 2.4 syntax of course). Both 2.3 and 2.4 are built
> from source on Cygwin, not ActiveState's binaries, so it might have to
> do with this, but I'm unwilling to install yet another python
> distribution. Does anyone have the same problem with background syntax
> checking on 2.4 ? Thanks,

George,

My suspicion is that the difference is that you are using a Cygwin
Python and it is using Un*x-style process return values. What do the
following return for your Python.

For me on Windows (with ActivePython 2.4):
    >>> import os
    >>> os.system("exit 0")
    0
    >>> os.system("exit 1")
    1

And on Linux:
    >>> import os
    >>> os.system("exit 0")
    0
    >>> os.system("exit 1")
    256

My cygwin Python is currently busted for some reason, so I can't test it
on my system.

On Unix-y/posix-y systems the retval from a process encodes both the
exit status and information on how the process was stopped (c.f. the
os.WIF* methods).

It would be helpful if you could log a bug for this in Komodo's bugdb so
we can track this and make sure it doesn't get lost:

    http://bugs.activestate.com/Komodo

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From jerf at jerf.org  Mon Apr 11 19:32:27 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Mon, 11 Apr 2005 19:32:27 -0400
Subject: semicolons
References: <mailman.1722.1113257644.1799.python-list@python.org>
Message-ID: <pan.2005.04.11.23.32.27.157426@jerf.org>

On Tue, 12 Apr 2005 00:14:03 +0200, Mage wrote:

>        Hello,
> 
> I amafraid of I will stop using semicolons in other languages after one
> or two months of python. However I see that python simply ignores the
> semicolons atd the end of the lines.
> 
> What's your advice? I don't want to write full-of-typo php scripts but I
> see the logic of the python syntax too.

Sorry, there's no easy answer for this.

In your own Python code, you can include extraneous semi-colons, but if
you intend to every distribute it, nobody is going to like working with
that.



From littlejohn.75 at news.free.fr  Fri Apr  1 03:52:49 2005
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 01 Apr 2005 08:52:49 GMT
Subject: that is it is not it (logic in Python)
Message-ID: <424d0be1$0$2882$626a14ce@news.free.fr>

I want to know if iter(iterator) returns always its argument (when
argument is an iterator)

So :
>>> iterable = range(10)
>>> it = iter(iterable)
>>> that = iter(it)
>>> that is it
True    # Good!
>>> that is it is not it
False   # What ?
>>>
>>> Python = map(bool, it)
>>> logic = True
>>> logic in Python is not it
True  # That was close!
>>>
>>> that is it or it is not it
True
>>>
>>> # from physics.constant import N
>>> N = 6.02e+27
>>> big = 192   # cm   1.92 meter is big for me (see my name)
>>> N is big
False   # what ?
>>>

--
Seriously on an April fool's day.


From grig.gheorghiu at gmail.com  Fri Apr  1 12:33:11 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 1 Apr 2005 09:33:11 -0800
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<WRe3e.1286$7b.403@trndny05>
	<pan.2005.04.01.17.20.56.143109@jerf.org>
Message-ID: <1112376790.984977.18890@l41g2000cwc.googlegroups.com>

>From what I know, the PyPy guys already have a unittest-to-py.test
translator working, but they didn't check in the code yet. You can send
an email to py-dev at codespeak.net and let them know you're interested
in this functionality. 

Grig



From t.bettio at transnorm.ch  Tue Apr 19 18:17:59 2005
From: t.bettio at transnorm.ch (Tiziano Bettio)
Date: Wed, 20 Apr 2005 00:17:59 +0200
Subject: newbie question
In-Reply-To: <1113947675.400070.319430@o13g2000cwo.googlegroups.com>
References: <465db603.0504191314.5d074cf8@posting.google.com>
	<1113947675.400070.319430@o13g2000cwo.googlegroups.com>
Message-ID: <42658397.40806@transnorm.ch>

Just a few days earlier someone posted me the link to panda3d 
(www.panda3d.org)
This is actually a gamengine/renderingengine on which u can develop 
games in python.

If u want to achieve high performance you'd rather use c++ and directly 
access libs like nvidias cg, ms directx or opengl...

for a "hello world", understanding how the 3d enviroment works and so on 
panda3d is a really good start.

cheers

tc


From radam2 at tampabay.rr.com  Sun Apr 24 01:32:51 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Sun, 24 Apr 2005 05:32:51 GMT
Subject: Variables
In-Reply-To: <mailman.2375.1114316225.1799.python-list@python.org>
References: <426B0283.40602@cloudthunder.com>	<d4f0op$kp$1@sea.gmane.org>	<mailman.2368.1114311072.1799.python-list@python.org>	<86u0lwrfbw.fsf@guru.mired.org>
	<mailman.2375.1114316225.1799.python-list@python.org>
Message-ID: <7cGae.21386$5f.19242@tornado.tampabay.rr.com>

Richard Blackwood wrote:

> He would argue strongly against your notion of variable. In the 
> statement "foo = 5", foo is constant. He would thus argue that foo is a 
> constant and not a variable (regardless of whether you change foo's 
> value in subsequent statements).

Sounds like his mind is made up and you will probably not be able to 
persuade him otherwise.

But maybe this will help... or not. ;-)

Given a math equation...

x = 2y+3

x and y are clearly (most would agree) variables.  The value of each 
changes depending on the value of the other.

To solve the equation you set one variable to a value to find the other.

x = 2*y+3
y = 5

x = 2*5+3
x = 13

Do this again for other values... etc...

Would he agree that x, and y are variables even after a value is 
determined?  Or would he say that they become constants once you decide 
a value for one?

I think context is the deciding factor if this is a general discussion 
concerning math equations.  The above equation may be an equation of a 
line, or it may be the equation of a specific condition with two unknowns.

They may variables which may either have the value which is constant, a 
known value, an unknown value, or a range of values.

So given only "foo = 5" ...

In Python foo is a Name which is bound to the integer 5.  There are 
other way to describe it, but it all comes down to being symbols 
representing a concept.

(It could have been a randomly generated sequence with no meaning at all 
too!)

Without knowing the context of the discussion, that is all that we can 
say.  However if we were to agree that foo represents a concept that has 
an unchanging value in the context that it is used, then it is a 
constant, because we agreed that it is.  So it is determined by the 
meaning we agree (or decide for ourself) to give to the name "foo".

So what is the meaning of foo?  In general computer discussions foo is 
ever changing and represents an abstract object to be used and reused to 
describe a multitude of possibilities.  I would call that a variable.

  ;-)

Cheers,
Ron


From cam.ac.uk at mh391.invalid  Wed Apr 27 10:17:08 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 27 Apr 2005 15:17:08 +0100
Subject: names of methods, exported functions
In-Reply-To: <426f9552.44993106@news.oz.net>
References: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
	<d4nmv1$f5d$1@gemini.csx.cam.ac.uk> <426f9552.44993106@news.oz.net>
Message-ID: <d4o6t6$n6r$1@gemini.csx.cam.ac.uk>

Bengt Richter wrote:

> Using help: (BTW, it would be nice to have some keyword arguments for help to filter down
> information to exclude what may not be interesting)

No kidding. What do you think the output should look like in that case?

I think we don't need the mro, or any of the magic methods inherited 
from the builtin.
-- 
Michael Hoffman


From tom.cocagne at gmail.com  Wed Apr 13 18:30:29 2005
From: tom.cocagne at gmail.com (Tom Cocagne)
Date: Wed, 13 Apr 2005 18:30:29 -0400
Subject: Embedding threaded Python
References: <17z9xcflpzk5z$.ao7hpt7phqfu$.dlg@40tude.net>
Message-ID: <115r7aujvaf4sf3@corp.supernews.com>

 You only need to call PyEval_InitThreads() for multithreaded C-code. The
Python threads operate on a different principle.

 Tom

Ricardo wrote:

> If I embed Python in a C app and the Python code is threaded, but the C
> code isn't, do I need to call PyEval_InitThreads() ? - or do you only need
> to do that if the C code is threaded ?



From deetsNOSPAM at web.de  Thu Apr 21 08:04:51 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Thu, 21 Apr 2005 14:04:51 +0200
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com>
Message-ID: <d484t1$9cj$02$2@news.t-online.com>

> implement. BTW, all modern systems come complete with 'goto' implemented
> in *hardware* - they're called "interrupts".

That's not goto - that is a asynchronous function call - much closer related
to multithreading.

In an interrupt, you can always jump back to the main program using rte
(return from interrupt) - or whatever that is called on the respective
processor.

Of course you _can_ alter all sorts of state, including the stackframe and
the PC when inside an interrupt - thus you can create goto for e.g.
multithreading. But I wouldn't call that builtin-goto...


-- 
Regards,

Diez B. Roggisch


From inyeol.lee at siimage.com  Fri Apr  8 18:07:06 2005
From: inyeol.lee at siimage.com (Inyeol Lee)
Date: Fri, 8 Apr 2005 15:07:06 -0700
Subject: Declaring variables from a list
In-Reply-To: <2ab2ed5505040814454b087df1@mail.gmail.com>
References: <1163d88e.0504081255.438fbb96@posting.google.com>
	<2ab2ed5505040814454b087df1@mail.gmail.com>
Message-ID: <20050408220706.GG7999@siliconimage.com>

On Sat, Apr 09, 2005 at 03:15:01AM +0530, Sidharth Kuruvila wrote:
> Python has a builtin function called locals which returns the local
> context as a dictionary
> 
> >>> locals = locals()
> >>> locals["a"] = 5
> >>> a
> 5
> >>> locals["a"] = "changed"
> >>> a
> 'changed'

>From Python lib reference:

"""
locals()
    ...
    Warning: The contents of this dictionary should not be
    modified; changes may not affect the values of local variables used
    by the interpreter. 
"""


From igorcarron at gmail.com  Mon Apr 18 14:48:55 2005
From: igorcarron at gmail.com (igorcarron at gmail.com)
Date: 18 Apr 2005 11:48:55 -0700
Subject: Replaying multimedia data.
Message-ID: <1113850135.308327.204680@z14g2000cwz.googlegroups.com>

Hello,

On a robotic project I am working on, I am taking data through
different sensors (cameras, acceleration, gyroscopes,....) and store
the attendant data into files for further processing.

When I am done gathering data, I read them offline using nearly the
same script as the one I used to gather them. While I don't have a
problem with reading them in a text format, I would like to display
them to others than myself in a way that is visually appealing.
Something along the lines of "replaying" the data. In other words,
traces like acceleration, would be appearing on a graph as if the robot
was evolving over time after I push a "replay" button. I'd like to do
that not only for the nine traces (1-d plots) I have but also with the
frames taken the camera (in effect, the screen would show a cartoon of
frames of what the robot saw during the data gathering) in real-time.


I don't think it is difficult using python and something like PIL, but
I am wondering if any of you know of a project that had this similar
feel so I could hack it to fit to the data I gathered.

Thanks in advance for any pointers,

Igor.



From bkhl at stp.ling.uu.se  Thu Apr 28 11:31:11 2005
From: bkhl at stp.ling.uu.se (=?utf-8?q?Bj=C3=B6rn_Lindstr=C3=B6m?=)
Date: Thu, 28 Apr 2005 17:31:11 +0200
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<_Lm9e.23143$Xm3.17864@trndny01>
	<mailman.2173.1114002239.1799.python-list@python.org>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<slrnd6ejte.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <87r7guhq9s.fsf@lucien.dreaming>

Antoon Pardon <apardon at forel.vub.ac.be> writes:

> The problem is that the fields in lst are associated
> with a number that is off by one as they are normally
> counted. If I go and ask my colleague which field
> contains some specific data and he answers:
> the 5th, I have to remind my self I want lst[4]
>
> This is often a cause for errors.

It sounds like you should wrap that list in an object more reminding of
the source data, then.

-- 
Bj?rn Lindstr?m <bkhl at stp.ling.uu.se>
Student of computational linguistics, Uppsala University, Sweden


From robin at reportlab.com  Thu Apr 28 10:42:43 2005
From: robin at reportlab.com (Robin Becker)
Date: Thu, 28 Apr 2005 15:42:43 +0100
Subject: regex over files
In-Reply-To: <427099A6.8030604@jessikat.fsnet.co.uk>
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>	<mailman.2611.1114656019.1799.python-list@python.org>
	<427099A6.8030604@jessikat.fsnet.co.uk>
Message-ID: <4270F663.2040809@chamonix.reportlab.co.uk>

Robin Becker wrote:
> Skip Montanaro wrote:
> ......
> 
>>
>> I'm not sure why the mmap() solution is so much slower for you.  
>> Perhaps on
>> some systems files opened for reading are mmap'd under the covers.  
>> I'm sure
>> it's highly platform-dependent.  (My results on MacOSX - see below - are
>> somewhat better.)
>>
..... as a data point with sscan0/1.py (slight mods of your code) I get this 
with a 200mb file on freeBSD 4.9

/usr/RL_HOME/users/robin/sstest:
$ python sscan0.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=7.37
/usr/RL_HOME/users/robin/sstest:
$ python sscan1.py xxx_200mb.dat
fn=xxx_200mb.dat n=3797470 l=181012689 time=129.65
/usr/RL_HOME/users/robin/sstest:

ie the freeBSD vm seems to thrash just as nastily as xp :(
-- 
Robin Becker



From kay.schluehr at gmx.net  Tue Apr  5 14:02:35 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 5 Apr 2005 11:02:35 -0700
Subject: Decorator Base Class: Needs improvement.
In-Reply-To: <42526c32.357421755@news.oz.net>
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<1112687665.297515.231430@o13g2000cwo.googlegroups.com>
	<42526c32.357421755@news.oz.net>
Message-ID: <1112722797.993192.99190@l41g2000cwc.googlegroups.com>

Bengt Richter wrote:

> From the 2.4 Grammar, the key part seems to be
>
>     decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
>     decorators: decorator+
>     funcdef: [decorators] 'def' NAME parameters ':' suite
>
> and further on
>
>     dotted_name: NAME ('.' NAME)*
>
> So the Python Grammar's name for the @-expression is just plain
"decorator"
> which conflicts with my English-based reading of the word ;-/

What about playing with the words decorator/decoration? The allegoric
meaning of the decorator

def deco(f):
    pass

would be: f is "vanishing under decoration" - all is vanity.

In the example deco would be both a decorator and a decoration. In
other cases deco were a decorator and deco(x,y) the decoration.

Regards,
Kay



From mwm at mired.org  Mon Apr 25 01:26:38 2005
From: mwm at mired.org (Mike Meyer)
Date: Mon, 25 Apr 2005 00:26:38 -0500
Subject: cross platform printing
References: <0hx4e.3479$3O2.2184@trnddc01>
	<mVa5e.6469$6k4.803027@news20.bellglobal.com>
	<1GYae.2601$Nc.903@trnddc05>
Message-ID: <86pswjpgtt.fsf@guru.mired.org>

"David Isaac" <aisaac0 at verizon.net> writes:

>> Alan Isaac wrote:
> I meant something that application users on different platforms can print
> with, not something
> that they could coerce a platform into supporting given enough energy (e.g.,
> via Cygwin).
> The closest to an option so far seems to be to generate PDF and assume an
> application is available to print it.  Not beautiful.

What about generating some other image format? It does seem more
likely that the host OS will be able to handle, say GIF, than
PDF. In particular, Windows probably comes able to print GIF out of
the box, but not PDF. Then again, when I use Windows acrobat reader
gets installed fairly early, so I may have overlooked it.

    <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From t-meyer at ihug.co.nz  Mon Apr  4 23:38:09 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Tue, 5 Apr 2005 15:38:09 +1200
Subject: Unexpected result when comparing method with variable
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E802812301@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB0030@its-xchg4.massey.ac.nz>

[David Handy]
> I had a program fail on me today because the following didn't 
> work as I expected:
> 
> >>> class C:
> ...     def f(self):
> ...         pass
> ...
> >>> c = C()
> >>> m = c.f
> >>> m is c.f
> False
[...]
> The workaround really awkward:

What's wrong with this?

>>> class C:
... 	def f(self):
... 		pass
... 	def g(self):
... 		pass
... 	
>>> c = C()
>>> m = c.f
>>> m == c.f
True
>>> m == c.g
False

=Tony.Meyer



From peter at engcorp.com  Mon Apr 11 10:17:35 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 11 Apr 2005 10:17:35 -0400
Subject: Thoughts on some stdlib modules
In-Reply-To: <4258e5e6$0$3407$9b622d9e@news.freenet.de>
References: <mailman.1524.1112951803.1799.python-list@python.org>
	<4257BE8B.9080209@v.loewis.de>
	<1113120099.217977.192190@g14g2000cwa.googlegroups.com>
	<4258e5e6$0$3407$9b622d9e@news.freenet.de>
Message-ID: <jc2dnQSqwdxqG8ffRVn-hg@powergate.ca>

Martin v. L?wis wrote:
> I personally find the notion of "path objects" confusing. Is this a
> real path name on the local system, or merely a potential one? If
> potential, why does it have a .size attribute 

> (what is the size of a non-existing file)? 

Logically (and, I feel, quite intuitively), it's an exception:

 >>> from path import path
 >>> path('testxxx').size
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "c:\python24\lib\ntpath.py", line 229, in getsize
     return os.stat(filename).st_size
OSError: [Errno 2] No such file or directory: u'testxxx'

-Peter


From mage at mage.hu  Thu Apr 21 12:58:43 2005
From: mage at mage.hu (Mage)
Date: Thu, 21 Apr 2005 18:58:43 +0200
Subject: goto statement
In-Reply-To: <d48la8$onm$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>	<87vf6hlkix.fsf@wilson.rwth-aachen.de>	<d45kna$f1o$1@news.tsystems.kiev.ua>	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca>
	<42666097.3040405@i.com.ua>	<1114100669.807737.192320@l41g2000cwc.googlegroups.com>
	<d48la8$onm$1@news.tsystems.kiev.ua>
Message-ID: <4267DBC3.3070407@mage.hu>

Maxim Kasimov wrote:

>
> how do use this here:
>
> print "hello world"


There are cases when you can't do it in any language.

----
php:

/* this is a debug comment

function1();
function2();

/* this is a normal multiline comment block
it ends here
*/

function3();

*/ end of debug comment
----

/ if you don't really want to do it /

       Mage


From eldiener_no_spam_here at earthlink.net  Sun Apr 10 20:24:05 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Mon, 11 Apr 2005 00:24:05 GMT
Subject: Python 2.4.1 install broke RedHat 9 printconf-backend
References: <1113176970.564908.293230@o13g2000cwo.googlegroups.com>
Message-ID: <Fsj6e.4845$sp3.2908@newsread3.news.atl.earthlink.net>

BrianS wrote:
> Hi,
>
> I'm trying to learn Python and wanted to play with Tkinter.  I
> couldn't get it to work so I figured it would help if I installed the
> newest verison of Python.  I downloaded the source, compiled it and
> installed it.  No problem.  The next time I booted my machine I the
> following errors when it tried to start CUPS:
>
> Traceback (most recent call last):
>   File "/usr/sbin/printconf-backend", line 6, in ?
>     import backend
>   File "/usr/share/printconf/util/backend.py", line 37, in ?
>     import cups_import
>   File "/usr/share/printconf/util/cups_import.py", line 7, in ?
>     from printconf_conf import *
>   File "/usr/share/printconf/util/printconf_conf.py", line 83, in ?
>     from xml.utils import qp_xml
> ImportError: No module named utils
>
> It seems that the xml package have been changed.  My problem is that I
> don't know enough Python to fix it properly.  The old verison of
> Python was 2.2.2 and the
> version I just installed is 2.4.1.  This is on a Dell Inspiron 8500
> running Red Hat 9.
>
> Anyone have any ideas?  Thanks in advance.

Change the /usr/bin/python link from python2.4 to whatever version of python
exe it used to point to, probably python2.2 in your case. The Python2.4
install does not overwrite any of your python2.2 files, it just changes the
python link.

> Brian




From cf_1957 at hotmail.com  Wed Apr 27 07:34:53 2005
From: cf_1957 at hotmail.com (chris)
Date: Wed, 27 Apr 2005 11:34:53 GMT
Subject: suggestions on how to do this
Message-ID: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>

The problem I have is as follows:

I have a recursive function b(k)

b(k) = -(A/k**2)*(b(k-2) - b(k-5))
k<0, b(k)=0
k=0, b(k)=1
k=1, b(k)=0

eg. b(2) = -A/4
      b(3) = 0
      b(4) = A**2/64

note that as k increases b(k) can itself be a sum of terms in powers of A
rather than a single power of A in the examples above.

Summing all terms and equating to zero gives:

F= sum b(k) = 0 for all k = 0, infinity

When this is expanded I get a polynomial F(A). I want to determine the
coefficients of the polynomial so that I can find the roots of the function
F up to a specified order of A.


I have yet to code this but I was hoping for some ideas on how to do this
reasonably.

I figure I can compute each b(k) and store the numeric value(s) and
associated powers of A. Then collect coefficients for like powers of A.
Finally I have a set of polynomial coefficients in A which I can pass to
scipy.base.roots()

Any suggestions on how I might do this efficiently? I have no doubt I can
get this done with brute force, but I would prefer to explore more elegant
means which I look to the masters for.

tia





From kay.schluehr at gmx.net  Sun Apr 17 04:46:14 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 17 Apr 2005 01:46:14 -0700
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<3jl2615c5pckknicc32ccv2cktue3nh603@4ax.com>
	<Pine.A41.4.61b.0504161553190.72462@dante72.u.washington.edu>
	<7og3615g159tgksejbo15oo8jcit3ugec2@4ax.com>
Message-ID: <1113727574.834162.10650@l41g2000cwc.googlegroups.com>

Ron_Adam wrote:

> I sort of wonder if this is one of those things that looks like it
> could be useful at first, but it turns out that using functions and
> class's in the proper way, is also the best way. (?)

I think Your block is more low level. It is like copying and pasting
code-fragments together but in reversed direction: if You copy and
paste a code fragment and wants to change the behaviour You probable
have to change the fragment the same way in every place of occurence.
This is a well known anti-pattern in software construction. If You
change Your thunk somehow e.g. from

def yield_thunk:
    yield i

to

def yield_thunk:
    yield j

You have to change all the environments that use the thunk e.g.
renaming variables. It is the opposite direction of creating
abstractions i.e. a method to deabstract functions: introduce less
modularity and more direct dependencies. This is the reason why those
macros are harmfull and should be abandoned from high level languages (
using them in C is reasonable because code expansion can be time
efficient and it is also a way to deal with parametric polymorphism but
Python won't benefit from either of this issues ).

Ciao,
Kay



From sjmachin at lexicon.net  Fri Apr 22 16:35:53 2005
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 23 Apr 2005 06:35:53 +1000
Subject: c-extension crashes unexpected
References: <f791a214.0504220637.63492afd@posting.google.com>
Message-ID: <vnki61d2dcdehlcj852v06e7iu5flt3t3k@4ax.com>

On 22 Apr 2005 07:37:11 -0700, garz at tmft.net (Markus Wintermann)
wrote:

>hello,
>
>i try to write an extension which calls an api.
>however,
>i haven?t written very much till now, 
>but i`ve already managed to make a mistake.
>
>because when i try to call my function,
>python 2.4 dies with an errorwindow.
>
>i believe that has something todo with reference counts and memory
>allocation but i can?t find my mistake.
>
>here?s the code:
>
>/* Wrapper-Funktion f?r apiJob() */
>static PyObject* wrap_apiJob(PyObject* self, PyObject* args) {
>
>	PyObject *resultlist;
>	unsigned short i,j,setcount,resultcount;
>
>	for (i=0;i<setcount+1;i++) {
>		PyList_SetItem(resultlist, i, Py_BuildValue("i",i));

Thomas has already shown you where your particular bug is. However you
have a general problem. Look at the documentation for PyList_SetItem
and Py_BuildValue:
"""
int PyList_SetItem( PyObject *list, int index, PyObject *item) 

Sets the item at index index in list to item. Returns 0 on success or
-1 on failure. Note: This function ``steals'' a reference to item and
discards a reference to an item already in the list at the affected
position. 

PyObject* Py_BuildValue( char *format, ...) 

Return value: New reference. 
Create a new value based on a format string similar to those accepted
by the PyArg_Parse*() family of functions and a sequence of values.
Returns the value or NULL in the case of an error; an exception will
be raised if NULL is returned.  <snip>
"""

You are not testing for errors after PyBlahBlah() function calls.

The last line of your code that I quoted above should be replaced by
something like this:

    val = Py_BuildValue("i",i);
    if (val == NULL) BOGOFF(1);
    if PyList_SetItem(resultlist, i, val) BOGOFF(2);

where BOGOFF(n) is a #define that prints something like "Problem n in
<myfunc>" if you are in debug mode, and then does a "goto cleanup"
where you release resources and return NULL;    

This testing (and the following purist-horrifying "goto" to get to
your clean-up block) is an unfortunate but necessary part of using the
Python C API. 

Some suggestions:

1. Try Pyrex. You get to write in a higher-level language and it does
all the boring ugly error-prone stuff for you -- this includes
reference counting as well! Look at the C code that Pyrex generates,
to see what Pyrex is saving you from.
2. If you still insist on DIY, look at some of the Python source code
in the Modules and Objects directories to see how it is done.
3. Examine carefully the book or whatever you have been learning from.
If it doesn't cover topics like always checking for errors, throw it
in the garbage bin (and tell the world via this newsgroup). If it does
cover such topics but you've been ignoring it, well then, it's up to
you what you do next :-)

HTH,
John


From vegeta.z at gmail.com  Fri Apr  8 05:15:23 2005
From: vegeta.z at gmail.com (vegetax)
Date: Fri, 08 Apr 2005 05:15:23 -0400
Subject: Thoughts on some stdlib modules
Message-ID: <d35hul$o4p$1@sea.gmane.org>

I was messing around in google looking for the available python form
validation modules when i found this:
http://www.jorendorff.com/articles/python/path/, and i realized that is very
similar to my python fileutils module,which encapsulate,path
operations,file operations,etc.

And those thoughts comes to mind again, if python is such a great language
why does the stdlib is so bloated with duplication,bad bad library
design,clumsy to use modules,etc.

Why does people have to put wrappers around about half of the standart
library modules? i have wrappers for urllib,urllib2,urlparse in urlutils.
glob,shutils,os.path,os,filecmp,etc in fileutils.
time,datetime.time,date,datetime.datetime,time.date,etc,etc in DateTime.
And so the list goes on.

I mean is this normal? i dont think so.I havent seen such a messy stdlib in
any language.Is it because of legacy code and backwards compatibility or
because not too much people in the python-dev cares about library design? i
admit the python language design is really really great but the stdlib is
totally forgotten.

Are those issues being considered right now? i cant find any PEP addressing
the issue especifically, at least cooking it for python 3000.

specific topics could be:

grouping related modules.
removing useless legacy modules.
refactoring duplicated functionality.
removing/redesigning poorly written modules.
adding a module versioning system.



From dcrespo at gmail.com  Fri Apr 22 17:37:00 2005
From: dcrespo at gmail.com (dcrespo)
Date: 22 Apr 2005 14:37:00 -0700
Subject: PDF Printing support from Python
In-Reply-To: <116inf1aivjgd28@corp.supernews.com>
References: <1114191192.978923.268390@f14g2000cwb.googlegroups.com>
	<116iihncpcr5057@corp.supernews.com>
	<1114198703.935948.286720@o13g2000cwo.googlegroups.com>
	<116inf1aivjgd28@corp.supernews.com>
Message-ID: <1114205820.773917.70820@f14g2000cwb.googlegroups.com>

>> Your solution requires a previous installation of Acrobat.

> Probably not.  Most printing systems I'm familiar with use
> ghostscript to render PDF into either postscript (the case on
> my machines at home) or whatever raster format the printer
> desires (the case at my office).

Acrobat (windows) and Ghostscript are PDF drivers.

>> Internally, the OS is sending the pdf file to the Acrobat PDF
>> Driver and then it is sent to the printer.

> Nope.  It's usnig the foomatic print filters which in turn use
> ghostscript to render PDF.

What I mean is that the pdf file is sent to a pdf driver (some program
to interpret it)... In your case is ghostscript, and in my case is
Acrobat.

> No you just need a good printing system.  CUPS + foomatic works
> great for me.  It knows what to do with postcript, text, PDF,
> dvi, and a whole boatload of other fileformats that I don't
> ever use.

CUPS + foomatic are the whole megadriver... So it's just a manner of
saying PDF Driver for my study case.

Really thanks for all the information :) I didn't know about
Ghostscript.

Daniel



From lucio.torre at gmail.com  Mon Apr 18 09:18:06 2005
From: lucio.torre at gmail.com (Lucio Torre)
Date: 18 Apr 2005 06:18:06 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
Message-ID: <1113830286.364709.164740@z14g2000cwz.googlegroups.com>

Make sure you write the expression in the lower text-area, and then
press the send button. This should do it.

I did the port something like a year ago (when i didnt knew metroweks
for Palm was discontinued) and when i tried it last week i couldnt
figure out how to use it. Then i realized that i must use the lower
text-area. Its was not designed for ease of use :)

Lucio.



From deetsNOSPAM at web.de  Sun Apr 17 09:23:49 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sun, 17 Apr 2005 15:23:49 +0200
Subject: module to parse "pseudo natural" language?
References: <d3thql$4rh$1@news.hispeed.ch>
Message-ID: <d3to15$kd2$01$1@news.t-online.com>

> 
> Question is - is there a module out there that will already handle this
> approach?

Try the python nltk. I haven't done stuff with it so far, but I'd certainly
give it a try when I need natural language support.


http://nltk.sourceforge.net/

-- 
Regards,

Diez B. Roggisch


From max at alcyone.com  Wed Apr 20 00:29:25 2005
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 19 Apr 2005 21:29:25 -0700
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <1113925169.076737.41010@g14g2000cwa.googlegroups.com>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
	<1113830286.364709.164740@z14g2000cwz.googlegroups.com>
	<slrnd69cu7.1ab.klaus@main.szn.dk>
	<1113922611.915845.256360@o13g2000cwo.googlegroups.com>
	<1113925169.076737.41010@g14g2000cwa.googlegroups.com>
Message-ID: <X8ydnfSK05E7R_jfRVn-pw@speakeasy.net>

RM wrote:

> I get odd results when trying to use exponents.  For example:
> 
>>>>4^2
> 6
> 

Someone else already pointed out that ** is exponentiation.  ^, on the 
other hand, bitwise exclusive or.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   One sword keeps the other in the sheath.
   -- George Herbert


From harlinseritt at yahoo.com  Fri Apr 29 23:44:49 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 29 Apr 2005 20:44:49 -0700
Subject: Killing process
In-Reply-To: <k8KdnRntjOUZQu_fRVn-qQ@powergate.ca>
References: <1114823011.063614.27150@l41g2000cwc.googlegroups.com>
	<k8KdnRntjOUZQu_fRVn-qQ@powergate.ca>
Message-ID: <1114832689.316806.136670@l41g2000cwc.googlegroups.com>

I think I need something besides TerminateProcess(). Is there anyway
possible to terminate a process by just passing a string value to the
function? Honestly, I am not interesting in terminating a process by
its handle.



From stewart.midwinter at gmail.com  Wed Apr  6 00:40:26 2005
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 5 Apr 2005 21:40:26 -0700
Subject: tkinter destroy()
In-Reply-To: <i0i3e.1153778$35.42716739@news4.tin.it>
References: <qda2e.1129991$35.42052766@news4.tin.it>
	<opsoef83ndrqur0o@eb.pragmadev>
	<Qye2e.1131601$35.42117550@news4.tin.it>
	<1112255241.819981.206500@o13g2000cwo.googlegroups.com>
	<i0i3e.1153778$35.42716739@news4.tin.it>
Message-ID: <1112762426.603738.95580@g14g2000cwa.googlegroups.com>

Macs:

"if we follow your advice we should do:

     immagine_1a = PhotoImage()
     ....

instead, but it doesn't work. why? "

Images are a special case.  You need to create an object instance of
them through the self. construction or else Tkinter seems to forget
about them within a couple of lines of code.  so yes, just use
self.immagine_1a and it should work.

lots of good information on:
http://tkinter.unpy.net/wiki

I took a quick look at your app but the button doesn't open the 2nd
window.   I see that you sent your message a few days ago so you've
probably solved that problem by now. 

S



From chris at angband.org  Thu Apr 28 08:34:33 2005
From: chris at angband.org (Operation Latte Thunder)
Date: Thu, 28 Apr 2005 12:34:33 +0000 (UTC)
Subject: Shutting down twisted reacotr
References: <d4oqhj$he4$1@news-int2.gatech.edu>
	<1114652186.103374.240070@o13g2000cwo.googlegroups.com>
Message-ID: <d4ql8o$c6m$1@news-int2.gatech.edu>

Jason  Mobarak <jason.mobarak at gmail.com> wrote:
> Why do you want to do this in a thread? What's wrong with
> reactor.callLater?
> 
> import time
> from twisted.internet import reactor
> 
> def shutdown():
> 
>    time.sleep(3)
>    print "stopping"
>    reactor.callFromThread(reactor.stop)
> 
> reactor.callInThread(shutdown)
> reactor.run()

In the app I am playing with, I have a thread that reads from the console.
When it terminates, I wanted it to shut down the reactor and couldn't use
callLater.  However, callFromThread worked perfectly.   I guess I need to
look at the docs some more to understand why its necessary 

-- 
chris at acheris.net			|             Roma Invicta!


From tiissa at nonfree.fr  Mon Apr 18 15:19:05 2005
From: tiissa at nonfree.fr (tiissa)
Date: Mon, 18 Apr 2005 21:19:05 +0200
Subject: packages
In-Reply-To: <mailman.2060.1113849926.1799.python-list@python.org>
References: <4263FC93.5090104@mage.hu>
	<mailman.2060.1113849926.1799.python-list@python.org>
Message-ID: <42640829$0$4565$626a14ce@news.free.fr>

Jaime Wyant wrote:
> What I *dont* like about the example is the PascalStyleCasing used for
> the package names.  Is their not some *suggested* standard on naming
> conventions?
There is: see PEP 8.
http://www.python.org/peps/pep-0008.html

However, I understood there was no definitive convention hence various 
common styles.


From bvande at po-box.mcgill.ca  Fri Apr 22 19:41:21 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Fri, 22 Apr 2005 19:41:21 -0400
Subject: Overiding error message when using a python program
In-Reply-To: <nsp*YTKMq@news.chiark.greenend.org.uk>
References: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
	<mailman.2288.1114184386.1799.python-list@python.org>
	<nsp*YTKMq@news.chiark.greenend.org.uk>
Message-ID: <42698BA1.7000808@po-box.mcgill.ca>

Sion Arrowsmith said unto the world upon 2005-04-22 13:00:
> Brian van den Broek  <bvande at po-box.mcgill.ca> wrote:
> 
>>you've not included the part of your code which acts on the 
>>user's input.
> 
> 
> I think you'll find the answer to the question of where the code
> that acts on the user's input lies here:
> 
> 
>>(And your prompt_user function should use raw_input and 
>>return the user input for processing by other functions. raw_input is 
>>safer; input executes arbitrary code.)
> 

Quite so  :-[   I think I must have typed the two parts which you 
quote with different hands, because obviously my brain didn't manage 
to see them both at once.

Thanks for pointing that out.

Best,

Brian vdB


From fredrik at pythonware.com  Tue Apr  5 12:42:52 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 5 Apr 2005 18:42:52 +0200
Subject: check interpreter version before running script
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
Message-ID: <d2uf1i$f3s$1@sea.gmane.org>

"rbt" <rbt at athop1.ath.vt.edu> wrote:

> Is there a recommended or 'Best Practices' way of checking the version of python before running 
> scripts? I have scripts that use the os.walk() feature (introduced in 2.3) and users running 2.2 
> who get errors. Instead of telling them, 'Upgrade you Python Install, I'd like to use sys.version 
> or some other way of checking before running.

if you depend on os.walk, check for os.walk.

    try:
        from os import walk
    except ImportError:
        print "sorry, you need a newer python version!"
        sys.exit()

or

    import os
    try:
        os.walk
    except AttributeError:
        print "sorry, you need a newer python version!"
        sys.exit()

if you only depend on a few functions, you can usually emulate them in
earlier versions.  if 2.2 or newer is a reasonable requirement, you can
put a copy of the walk function in your script:

    from __future__ import generators
    try:
        from os import walk
    except ImportError:
        def walk(...):
            # copied from os.py in 2.3

if you want to support e.g 1.5.2 or newer, you can use something like this:

    import os
    try:
        from os import walk
    except ImportError:
        class walk:
            def __init__(self, directory):
                self.stack = [directory]
            def __getitem__(self, index):
                dirpath = self.stack.pop(0)
                dirnames = []
                filenames = []
                for file in os.listdir(dirpath):
                    name = os.path.join(dirpath, file)
                    if os.path.isdir(name) and not os.path.islink(name):
                        dirnames.append(file)
                        self.stack.append(name)
                    else:
                        filenames.append(file)
                return dirpath, dirnames, filenames

(tweak as necessary)

</F> 





From rogerb at rogerbinns.com  Mon Apr 18 11:47:13 2005
From: rogerb at rogerbinns.com (Roger Binns)
Date: Mon, 18 Apr 2005 08:47:13 -0700
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net><mailman.1769.1113320562.1799.python-list@python.org><1o31j2-7l6.ln1@home.rogerbinns.com>
	<mailman.1876.1113453407.1799.python-list@python.org>
	<n9c1j2-198.ln1@home.rogerbinns.com>
	<d3vscb$i8r$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <vt1dj2-r31.ln1@home.rogerbinns.com>


"Stefan Behnel" <behnel_ml at gkec.informatik.tu-darmstadt.de> wrote in message news:d3vscb$i8r$1 at lnx107.hrz.tu-darmstadt.de...
>
> Roger Binns schrieb:
>> As far as I can tell, they failed at two hurdles.  One is that there
>> is a new BitPim release every two weeks and they can't really keep up
>> with that.  (eg it takes around two weeks for packages with a lot of
>> attention on Gentoo to become stable and often is a lot longer)
>
> This is why many open source projects include (possibly outdated) .spec files directly in their tree. Makes it easy to just adapt 
> them and run rpmbuild. Similar for Debian package specs.

Funnily enough there is an ebuild file in the BitPim source.  However
it has to be munged for each release since Gentoo requires the ebuild
filename to include the version number.  I don't bother releasing that
file due to the onerous non-automated SourceForge file upload process.
(And many of the dependencies aren't in Portage anyway so this would
have to be quite a number of ebuilds).

> With Python sources it is even easier (most of the time) since you can run
> python setup.py bdist_rpm
> which spits out a readily baken RPM, ready to be nailed into the system. Sadly, this doesn't exist for Debian and it doesn't work 
> for all Python packages (Twisted, that is).

The distutils approach is mainly useful for packages and libraries,
not for applications.  And of course it still has the prerequisites
issues mentioned earlier.

Roger 




From pinard at iro.umontreal.ca  Tue Apr 19 09:55:12 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Tue, 19 Apr 2005 09:55:12 -0400
Subject: def a((b,c,d),e):
In-Reply-To: <1113898210.973052.255840@l41g2000cwc.googlegroups.com>
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
	<d41ao3$ir$04$1@news.t-online.com>
	<mailman.2066.1113863546.1799.python-list@python.org>
	<1113898210.973052.255840@l41g2000cwc.googlegroups.com>
Message-ID: <20050419135512.GA12155@alcyon.progiciels-bpi.ca>

[George Sakkis]
> Fran?ois Pinard wrote:

> > The most useful place for implicit tuple unpacking, in my
> > experience, is likely at the left of the `in' keyword in `for'
> > statements (and it is even nicer when one avoids extraneous
> > parentheses).

> ... and would be nicest (IMO) if default arguments and *varargs were
> allowed too; check http://tinyurl.com/dcb2q for a relevant thread.

It's appealing, indeed, trying to create more uniformity between tuple
unpacking and argument passing.  There are two approaches towards such
uniformity, either upgrading tuple unpacking (as the above thread
discusses) or downgrading argument passing (as suggested by those who
found atrocious the current behaviour).

I started recently to study the R system and language, and saw many good
ideas in there about argument passing.  Translated in Python terms, it
would mean that `*varargs' and `**keywords' are not necessary last,
that named keywords may be intermixed with positional keywords, that
keywords may be abbreviated, and much more hairy, that the default
values for keywords are not pre-evaluated at `def' time, and that
the computation of actual expressions given as arguments is lazily
postponed until their first use within the function.  It surely looks
all strange at first, but these choices are surprisingly productive in
practice, as I merely begin to understand.  Curious minds may start at
http://cran.r-project.org/doc/manuals/R-lang.html#Arguments and read
down.  I do not know if there will ever be cross-pollinisation between R
and Python, but I would guess good things might came out of this...

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From jason.mobarak at gmail.com  Sat Apr 30 20:37:56 2005
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 30 Apr 2005 17:37:56 -0700
Subject: Trying to write CGI script with python...
In-Reply-To: <1114806476.477679.150290@f14g2000cwb.googlegroups.com>
References: <mailman.9.1114734748.14961.python-list@python.org>
	<1114803082.851505.149730@o13g2000cwo.googlegroups.com>
	<1114806476.477679.150290@f14g2000cwb.googlegroups.com>
Message-ID: <1114907876.724509.122910@z14g2000cwz.googlegroups.com>

M.E.Farmer wrote:
> I found an excellent example that was posted by the F-bot.
[...]
> try:
>     import myscript
>     myscript.main()
> except:
>     print "Content-Type:", "text/html"
>     print
>     file = StringIO.StringIO()

Note: it's usually a very bad idea to name -anything- "file" unless you
intentionally want to clobber the name of the built-in file object.

>     traceback.print_exc(file=file)
>     print "<pre>"
>     print cgi.escape(file.getvalue())
>     print "</pre>"
>
> > I haven't got access to error logs so I can't look at it that way.
> 
> </F>



From fu.limin.tao at gmail.com  Mon Apr 25 08:37:13 2005
From: fu.limin.tao at gmail.com (Limin Fu)
Date: Mon, 25 Apr 2005 14:37:13 +0200
Subject: ANN: Tao Scripting Language 0.9.0 beta released!
Message-ID: <b35444fb0504250537d3cdce1@mail.gmail.com>

Dear all,

I am glad to announce in this mailing list that the
lastest version of Tao scripting language has come 
out.

Welcome to try it out!

=======================
Here are some details:
=======================

Summary:
Tao is an object-oriented scripting language with dynamic typing
variables supporting complex data
structures. It has powerful text processing ability such 
as string regular expression matching. It provides 
built-in numerical data types such as complex number 
and multi-dimensional numeric array, and their
corresponding operations and computations are very 
convenient in Tao. It can be easily extended with C++,
through a simple and transparent interface.

Key Features:
1. Object-oriented ( syntax slightly similar to C++ ).
2. String regular expression with syntax support 
   ( similar to Perl ).
3. Numeric types and their operations 
   ( slightly similar to Matlab ).
4. Extendable with C++ through a simple and
   transparent interface.

ChangeLog:
+ : added
! : changed
* : fixed
- : removed

Release: tao_0.9.0_beta:
! Matrix type is generalized to numeric array supporting
  arbitrary dimensions and different precisions including
  byte, short, int, float and double. Many operations are
  also provided for numeric array.
+ Some convenient and powerful built-in functions are 
  implemented to manipulate numeric arrays, including 
  numarray(), apply(), noapply() and which() etc. Basic 
  mathematical functions are also supported for numeric
  arrays.
+ A feature called transient variable is implemented for
  convenient parameter passing in some situations.
+ Some "magic" functions which may take expressions 
  with transient variables as parameters to do some
  computions on arrays and numeric arrays without 
  explicit looping and subindexing. These functions 
  include numarray(), apply() and noapply() for numeric 
  array; iterate() and iterget() for normal array; 
  and which() for both. 
+ Some C++ types are provided for transparent passing
  Tao types to C++ modules, so that only two C++ 
  header files("taoCpptype.h" & "taoPlugin.h") are
  required to develop C++ modules loadable by Tao
  without linking to any additional libraries.
! The base class for TaoPlugin is changed from TaoBase
  to TcBase, so that the developing of Tao plugins only
  requires another header file "taoCpptype.h".
+ Basic string operations such as substring, insert,
  replace and erase by subindexing. And a few functions
  are added such as number(), pack() and unpack().
+ Added string regular expression matching for alternate
  and grouping such as /(\d|\w)(@1:\D|\c)/.
+ Substring substitution by regular expressions.
! Embedding expression in regular expressions is changed.
+ More convenient subindexing is supported for array and hash.
+ Local variables.
+ yield statement to use routine as generator.
+ Many operators such composite assignment (+=, -=,
  *=, /=,etc.), type comparision operators(=?,!?),
  right operators( .#,.@,.%, etc.)
+ eval(): evaluate a block of codes represented as a string.
+ Loop control: for(e1,e2,e3), logic control: e1 ? e1:e2; 
+ Other functions such as repeat(), about(), import(),
  load(), time(), astime() and asctime() etc.
! Many changes including keywords: sub->routine,
  continue->skip. commenting symbols are also changed.
* Some bugs.

Download:
http://prdownloads.sourceforge.net/taoscript/tao_0_9_0_beta.tar.gz?download

Document:
http://taoscript.sourceforge.net/An_Introduction_to_Tao_Language.pdf

HomePage:
http://taoscript.sourceforge.net

Contact:
Limin Fu: fu [dot] limin [dot] tao [at] gmail [dot] com


-- 

FU Limin

Homepage for Tao Language:
http://taoscript.sourceforge.net

Tao Language project at sourceforge.net:
http://sourceforge.net/projects/taoscript


From apardon at forel.vub.ac.be  Wed Apr 13 05:44:18 2005
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 13 Apr 2005 09:44:18 GMT
Subject: Python license (2.3)
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1751.1113310691.1799.python-list@python.org>
	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1793.1113334936.1799.python-list@python.org>
	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1818.1113375260.1799.python-list@python.org>
	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>
	<mailman.1823.1113383437.1799.python-list@python.org>
Message-ID: <slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>

Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
> Antoon Pardon wrote:
>> Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>
>>>Yes, the license text and the copyright notice must be attached. It 
>>>doesn't mean that the PSF license is the operative one for the 
>>>derivative work.
>> 
>> 
>> Why attach a license that is not operative. That doesn't make sense
>> to me and will IMO just create confusion.
>
> Because it's not your code. The tiny obligation that you have to satisfy 
> is to say that some of the code comes from someone else and is available 
> under such-and-such a license. That's it. You can keep the code hidden, 
> you can charge whatever you like for it, but you have to attribute it 
> properly. Open source licenses don't get much less restrictive than this.

Well maybe this is a semantic problem. I wouldn't use the word "attach"
here. So what I seem obligated to do, is 1) Mentioning this came
from the python distribution and 2) explain where this distribution can
be attained and under what license.

>>>You can put *your* own terms on top for *your* own code 
>>>as long as you can satisfy the requirements of the PSF license, which 
>>>are very light.
>>>
>>>Read Larry Rosen's book:
>>>
>>>   http://www.rosenlaw.com/oslbook.htm
>> 
>> 
>> I skimmed it and it doesn't seem to contain anything that helps me
>> with the PSF. If it does could you at least point me to the right
>> chapter.
>
> Well besides reading to understand the mechanics of copyright and 
> licensing, you should read Chapter 5: Academic Licenses, a class of open 
> source licenses to which the PSF License belongs. The only thing 
> particularly different between the PSF License and most other academic 
> licenses (like BSD and MIT) is that the PSF License is more explicit.
>
> Of course, IANAL and TINLA, so if you want real legal advice instead of 
> advice from random newsgroup bums like myself, you should talk to a lawyer.

Well if it comes so far I have to consult a lawyer I'd rather not publish
it in the first place.

The only reason I'm concerned is that this is to be part of a tutorial
and I prefer not to burden those who read the tutoral with any kind of
license. As far as I'm concerned people reading the tutorial can use
any code provided with it in any way they see fit.

I see this as my contribution to the communities who has provided me
with all kinds of things that are usefull to me. I'm willing to put
time into this, but if I have to spend money because it is impossible
otherwise to find out how to contribute legally, that is a hurdle
I'm reluctant to take.

-- 
Antoon Pardon


From jeffelkins at earthlink.net  Sun Apr 24 06:44:47 2005
From: jeffelkins at earthlink.net (jeff elkins)
Date: Sun, 24 Apr 2005 10:44:47 +0000
Subject: GUI woes
In-Reply-To: <xbDae.3439$L03.1548@newssvr17.news.prodigy.com>
References: <mailman.2361.1114307134.1799.python-list@python.org>
	<xbDae.3439$L03.1548@newssvr17.news.prodigy.com>
Message-ID: <200504241044.47573.jeffelkins@earthlink.net>

On Sunday 24 April 2005 02:07 am, Kartic wrote:
>
> Jeff - Could you please post your code?
>
>  From what you have posted it looks like your MyFrame class does not
> inherit from wx.Frame.
>

Thanks Kartic. That test.py was from the wxpython download site.


From jjl at pobox.com  Fri Apr 22 16:47:19 2005
From: jjl at pobox.com (John J. Lee)
Date: 22 Apr 2005 20:47:19 +0000
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org>
	<1114195506.747672.266890@o13g2000cwo.googlegroups.com>
Message-ID: <87k6muleso.fsf@pobox.com>

"Christopher De Vries" <chris.h.devries at gmail.com> writes:

> I have recently been using gtk+2 and glade2. I love glade because it
> allows me to visually design my interface and then use my favorite
> editor to code up all the callbacks. Best of all the UI is stored as an
> xml file you just load from your python program.
[...]

Qt, wx and Gtk all have toolsets to do this.  Tk too?


John


From superprad at gmail.com  Sun Apr 24 12:56:23 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 24 Apr 2005 09:56:23 -0700
Subject: Bounding box on clusters in a 2D list
In-Reply-To: <1114305334.875783.235380@f14g2000cwb.googlegroups.com>
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<1114305334.875783.235380@f14g2000cwb.googlegroups.com>
Message-ID: <1114361783.478573.70430@g14g2000cwa.googlegroups.com>

hi Bearphile! That really gives me an idea.Thanks much for that. Yes as
you said the algorithm reaches a maximium recursion depth for larger
sets i tried.I still have a question. if
m = [[0,0,0,0],[0,1,1,0,0],[0,0,1,0,0],[0,0,0,0]]

all it does is count the number of 1's and return us the number in that
cluster. But if I want the box to be considered as one cluster as
   [[0, 0, 0, 0, 0],
        +-----+
     [0,|1, 1,|0, 0],
         |        |
     [0,|0, 1,|0, 0],
        +-----+
     [0, 0, 0, 0, 0]]


because it could be that the 0 in between the cluster of ones is a part
of the group.So the area of this boundingbox is 4 rather than 3. Do you
see where I am heading



From vze4rx4y at verizon.net  Wed Apr 20 02:36:42 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Wed, 20 Apr 2005 06:36:42 GMT
Subject: Why Python does *SLICING* the way it does??
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
Message-ID: <_Lm9e.23143$Xm3.17864@trndny01>

<seberino at spawar.navy.mil>
> Many people I know ask why Python does slicing the way it does.....

Half open intervals are just one way of doing things.  Each approach has its own
merits and issues.

Python's way has some useful properties:

* s == s[:i] + s[i:]

* len(s[i:j]) == j-i     # if s is long enough


OTOH, it has some aspects that bite:

* It is awkward with negative strides such as with s[4:2:-1].  This was the
principal reason for introducing the reversed() function.

* It makes some people cringe when they first see it (you're obviously in that
group).


I suspect that whether it feels natural depends on your previous background and
whether you're working in an environment with arrays indexed from one or from
zero.  For instance, C programmers are used to seeing code like:   for(i=0 ;
i<n; i++) a[i]=f(i);   In contrast, a BASIC programmer may be used to FOR I = 1
to N:  a[I]=f(I); NEXT.    Hence, the C coders may find Python's a[:n] to be
more natural than BASIC programmers.

As long as a language is consistent about its approach, you just get used to it
and it stops being an issue after a few days.


Raymond Hettinger




From jaywgraves at gmail.com  Thu Apr 28 09:59:40 2005
From: jaywgraves at gmail.com (jay graves)
Date: 28 Apr 2005 06:59:40 -0700
Subject: Setting win32 console title from Python
References: <1114684215.236448.212970@g14g2000cwa.googlegroups.com>
Message-ID: <1114696780.653849.220080@o13g2000cwo.googlegroups.com>

Hmm.

>From an interactive interpreter this works for me.

import os
os.system('title Jay')

but the title returns to its previous value when I Ctrl-Z out of the
process.

If I save this as a file and run it, it seems to work without spawning
a new window but resets it the title after the program finishes like
above.

import os
os.system('title Jay')
x = raw_input()

You mention that the SetConsoleTitle api resets itself after the script
finishes so I'm assuming that 'title' command is just calling the same
api under the covers.

What is your requirement specifically?  I do something similar but in a
different way but it might not be what you are after.

I have a 'projects' directory where I keep all of my work.  I have
written a small python script 'p.py' that I call like this

p [s|e|*] projectname

the 's' is for shell
the 'e' is for explorer window
the '*' is for both shell and explorer

If there is only one argument, I assume it is the project name and I
default the other argument to 'e'.

if the projectname doesn't have any wildcard characters, I append a '*'
and glob my project directory with that value.  if the glob call only
returns a single value, I go ahead and do what was requested (open a
shell or explorer window to that directory)  if there is more than one
value returned, I present a numbered menu of project directories that
match and wait for input on which one to open.

The point to all this, is that when I open a shell from p.py I use this
command.
os.system(r'start "%s" /D%s\%s' % (proj,directory,proj))

This spawns a new cmd window with the title of my project name.
Spawning the process with the correct name from the beginning seems to
do the trick.
But like I said, I don't really know your exact requirements.

HTH.
...
jay



From ville at spammers.com  Sun Apr 24 18:30:05 2005
From: ville at spammers.com (Ville Vainio)
Date: 25 Apr 2005 01:30:05 +0300
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
Message-ID: <du7zmvn24gi.fsf@mozart.cc.tut.fi>

>>>>> "John" == John Bokma <postmaster at castleamber.com> writes:

    >> Nah, they aren't slow. They just have to worry about more things than
    >> the Python developers.

    John> Do you have references to this? I would love to see if
    John> indeed 100 Python programmers do implement, say 5 CS tasks
    John> faster compared to 100 Perl programmers, on average.

I am quite sure that given random sample of python and perl
programmers, the python programmers would be faster. Less thinking is
necessarily, no $ chars and generally less punctuation to worry about,
no error handling needed (exceptions take care of it automatically).

I would also venture to guess that random (adult) Python programmers
would be of higher skill level as far as programming in general goes
(know more languages, have a "good taste"...).

-- 
Ville Vainio   http://tinyurl.com/2prnb


From invalidemail at aerojockey.com  Fri Apr  1 16:40:50 2005
From: invalidemail at aerojockey.com (Carl Banks)
Date: 1 Apr 2005 13:40:50 -0800
Subject: Ternary Operator in Python
In-Reply-To: <mailman.1198.1112380413.1799.python-list@python.org>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<mailman.1198.1112380413.1799.python-list@python.org>
Message-ID: <1112391650.018826.274970@l41g2000cwc.googlegroups.com>


Terry Reedy wrote:
> "praba kar" <prabapython at yahoo.co.in> wrote in message
> news:20050401072442.73412.qmail at web8408.mail.in.yahoo.com...
> > Dear All,
> >    I am new to Python.  I want to know how to
> > work with ternary operator in Python.  I cannot
> > find any ternary operator in Python.  So Kindly
> > clear my doubt regarding this
>
> A unary operator has one operand; a binary operator has two operands;
a
> ternary operator has three operands.  Python has none built-in,

Not so fast, my friend.  What about the expression "0.0 < a < 1.0"?


-- 
CARL BANKS



From claudio.grondi at freenet.de  Fri Apr  8 08:27:26 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 8 Apr 2005 12:27:26 -0000
Subject: Problem with access to shared memory(W2K)  SOLVED
References: <3bilaqF6in0icU1@individual.net> <hdijzrny.fsf@python.net>
	<3birmbF6bhm54U1@individual.net> <y8bvy7vd.fsf@python.net>
	<3bj44iF6gj7t9U1@individual.net>
Message-ID: <3bn4m3F6l2o3qU1@individual.net>

I have got a solution to my problem from Thomas Heller by email.

The problem was solved by using .from_address() instead of
causing trouble cast() - here the solution as a generalized
example of code for reading access to shared memory area
with given 'appropriateName':

from ctypes import *
FILE_MAP_READ = 2

strNameOfSharedMemoryAreaToAccess = 'appropriateName'

handle = windll.kernel32.OpenFileMappingA(
   FILE_MAP_READ
  , 0
  , strNameOfSharedMemoryAreaToAccess
)
if not handle:
  raise WinError()

addr = windll.kernel32.MapViewOfFile(
   handle
  ,FILE_MAP_READ
  ,0
  ,0
  ,0
)
if not addr:
  raise WinError()

class structureOfSharedMemoryArea(Structure):
  _fields_ = [
     ("Elem01" , c_short ) # or any other ctype or ctype structure
     ("Elem02" , c_long )
     ...
     ("ElemNN" , c_long )
  ]

contentOfSharedMemoryArea = structureOfSharedMemoryArea.from_address(addr)

print 'Elem01 ', contentOfSharedMemoryArea.Elem01
print 'Elem02 ', contentOfSharedMemoryArea.Elem02
...
print 'ElemNN ', contentOfSharedMemoryArea.ElemNN

Claudio




From osv at javad.ru  Thu Apr 21 11:38:57 2005
From: osv at javad.ru (Sergei Organov)
Date: 21 Apr 2005 19:38:57 +0400
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com>
Message-ID: <d48heh$goe$1@n6.co.ru>

Grant Edwards <grante at visi.com> writes:

> On 2005-04-21, Peter Maas <peter at somewhere.com> wrote:
> > Maxim Kasimov schrieb:
> >> but what if i just can't to do this becouse i'm working thrue ssh, and 
> >> have to use only installed editors (such as vi)
> >
> > - at first line of block enter: ma (mark line as 'a')
> > - go to last line of block
> > - enter :'a,.s/^/###/ (insert 3 comment chars at begin of line,
> >    starting from line marked as 'a' to current line)
> 
> Sure, but what about the case where his program is on paper
> tape and all he has for an editor is an ice pick?

Then inserting goto doesn't seem to be an acceptable option either ;)

-- 
Sergei.


From venkatbo at yahoo.com  Mon Apr  4 15:47:44 2005
From: venkatbo at yahoo.com (Venkat B)
Date: Mon, 4 Apr 2005 12:47:44 -0700
Subject: mini_httpd (ACME Labs) & Python 2.4.1 integration
References: <1112560609.371539@sj-nntpcache-5>
Message-ID: <1112644395.745562@sj-nntpcache-3>

We found the answer, just in case one was looking for it...

I turns out that setting the environment params (CGI_PATH & CGI_LD_LIB_PATH)
is not sufficient. One has to still add the path entry to the script
itself... like so: #! <path-to>/python2.4

May also work with ensuring env variable PYTHONPATH is set right.

/venkat




From dccarson at gmail.com  Mon Apr 11 14:38:41 2005
From: dccarson at gmail.com (dccarson at gmail.com)
Date: 11 Apr 2005 11:38:41 -0700
Subject: smtplib does not send to all recipients
Message-ID: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>

Here is a snippet of code which does not send to all recipients.
However, it also does not inform me of this error.  My suspicion is
that this only fails for users with longer usernames.  The two I seem
to regularly fail on have 9 and 11 characters respectively.  Most users
have names <= 8 characters.

domain = "myDomainHere.com"
admin  = "d123456@%s" % domain
adminFull  = "Full Name Here <%s>" % admin
def mailMsg(text, subject, sender, recipients):
    # From: and To: headers at the start!
    if not sender:
        sender = adminFull
    elif not sender.endswith(domain):
        sender += ("@" + domain)
    addresslist = []
    for name in recipients:
        if not name.endswith(domain):
            name += ("@" + domain)
        addresslist.append(name)
    msg = "From: %s\r\nTo: %s\r\n" % (sender, ", ".join(addresslist))
    msg += "Subject: %s\r\n\r\n" % subject
    for line in text.split('\n'):
        msg += "%s\r\n" % line.rstrip()

    try:
        server = smtplib.SMTP('localhost')
        server.set_debuglevel(0)
        failures = server.sendmail(sender, recipients, msg)
        if len(failures):
            safeMailMsg("%s\n\n%s" % (failures, msg),
                        "ttLadder: sent with failures", [admin])
        server.quit()
    except smtplib.SMTPSenderRefused, sndErr:
        safeMailMsg("%s\n\n%s" % (sndErr, msg),
                    "ttLadder: sender refused", [admin])
    except smtplib.SMTPRecipientsRefused, rcpErr:
        safeMailMsg("%s\n\n%s" % (rcpErr, msg),
                    "ttLadder: recipients refused", [admin])
    except Exception, xcp:
        safeMailMsg("%s\n\n%s" % (xcp, msg),
                    "ttLadder: other exception", [admin])
    return

The safeMailMsg() routine uses os.system("mail...").  It works but it
is not sending me any error in this case.

When I test by sending the same mail to myself (7 characters) and a
long name (11 characters), I receive the e-mail but the other user does
not.  However, the header in the mail looks correct and if I do a
"Reply-all" it will happily send the mail to both of us.

Is this a known problem with older versions of smtplib?  I'm using
Python 2.2.2.

Thanks,
David



From bob at redivi.com  Mon Apr 11 12:27:18 2005
From: bob at redivi.com (Bob Ippolito)
Date: Mon, 11 Apr 2005 09:27:18 -0700
Subject: [Pythonmac-SIG] Fwd: PPC OSX vs. x86 Linux
In-Reply-To: <c371ef077af40f7b79580cb74e172f47@flowtheory.net>
References: <f8a9d419c58e4458e7c4dea6f4d4607f@flowtheory.net>
	<066c2653d9042a2903532e502b928cfc@redivi.com>
	<098bafc67df0f515aaf81aa4b7cc4c31@flowtheory.net>
	<c371ef077af40f7b79580cb74e172f47@flowtheory.net>
Message-ID: <c641730412fa287999c8d0b562f5cd29@redivi.com>


On Apr 11, 2005, at 8:00 AM, Joshua Ginsberg wrote:

>> On Apr 10, 2005, at 4:14 PM, Bob Ippolito wrote:
>>
>>>
>>> On Apr 10, 2005, at 2:46 PM, Joshua Ginsberg wrote:
>>>
>>>>> I writing some python code to do some analysis of my mail logs. I 
>>>>> took a 10,000 line snippet from them (the files are about 5-6 
>>>>> million usually) to test my code with. I'm developing it on a 
>>>>> Powerbook G4 1.2GHz with 1.25GB of RAM and the Apple distributed 
>>>>> Python* and I tested my code on the 10,000 line snippet. It took 2 
>>>>> minutes and 10 seconds to process that snippet. Way too slow -- 
>>>>> I'd be looking at about 20 hours to process a single daily log 
>>>>> file.
>>>>>
>>>>> Just for fun, I copied the same code and the same log snippet to a 
>>>>> dual-proc P3 500MHz machine running Fedora Core 2* with 1GB of RAM 
>>>>> and tested it there. This machine provides web services and domain 
>>>>> control for my network, so it's moderately utilized. The same code 
>>>>> took six seconds to execute.
>>>>>
>>>>> Granted I've got the GUI and all of that bogging down my Mac. 
>>>>> However, I had nothing else fighting for CPU cycles and 700MB of 
>>>>> RAM free when my testing was done. Even still, what would account 
>>>>> for such a wide, wide, wide variation in the time required to 
>>>>> process the data file? The code is 90% regular expressions and 
>>>>> string finds.
>>>>>
>>>>> * versions are:
>>>>> Python 2.3 (#1, Sep 13 2003, 00:49:11)
>>>>> [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
>>>>> and
>>>>> Python 2.3.3 (#1, May  7 2004, 10:31:40)
>>>>> [GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
>>>
>>> Try it with a newer version of Python on Mac OS X.  I had a similar 
>>> problem, and it turned out to be Python 2.3.0's fault.  
>>> Specifically, the implementation of the datetime module's parser was 
>>> really, really, really stupid and slow in early versions of Python 
>>> 2.3.
>>>
> Well, I compiled a fresh version of Python 2.3.5 from python.org to 
> test the datetime theory... and I'm still getting 150sec execution 
> times. :-/ I'm gonna test the string vs. strop now...

Use Python's profiling tools and/or Apple's Shark to see what's slow.

-bob



From abuse at solumslekt.org  Sun Apr 17 11:42:19 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Sun, 17 Apr 2005 17:42:19 +0200
Subject: sscanf needed
References: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
Message-ID: <vtv8e.6705$ai7.145609@news2.e.nsc.no>

Uwe Mayer skrev:

> Hi,
> 
> I've got a ISO 8601 formatted date-time string which I need to read
> into a datetime object.

Look up time.strptime, it does exactly what you want.
-- 
Leif Biberg Kristensen
http://solumslekt.org/


From pitonero at gmail.com  Sat Apr 30 08:47:16 2005
From: pitonero at gmail.com (El Pitonero)
Date: 30 Apr 2005 05:47:16 -0700
Subject: how can I sort a bunch of lists over multiple fields?
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
Message-ID: <1114865236.632867.98670@o13g2000cwo.googlegroups.com>

googleboy wrote:
>
> I am reading in a csv file that documents a bunch of different info
on
> about 200 books, such as title, author, publisher, isbn, date and
> several other bits of info too.
> ...
> I really want to be able to sort the list of books based on other
> criterium, and even multiple criteria (such as by author, and then by
> date.)

import string

input = open(r'c:\books.csv', 'r')
records = input.readlines()
input.close()

# assuming first line contains headers
headers = records.pop(0)
records = [x.strip().split(',') for x in records]

# header order
p_headers ='(title, author, publisher, isbn, date, other)'
p_sorts = '(author, title, date, publisher, other, isbn)'

temp_records = []
for r in records:
    exec '%(p_headers)s = r' % vars()
    exec 't = %(p_sorts)s' % vars()
    temp_records.append(t)

temp_records.sort()

sorted_records = []
for t in temp_records:
    exec '%(p_sorts)s = t' % vars()
    exec 'r = %(p_headers)s' % vars()
    sorted_records.append(r)

lines = [headers] + [','.join(x)+'\n' for x in sorted_records]
output = open(r'c:\output.csv', 'w')
output.writelines(lines) 
output.close()



From enleverlesO.OmcO at OmclaveauO.com  Wed Apr 20 06:48:18 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Wed, 20 Apr 2005 12:48:18 +0200
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
Message-ID: <426645bb$0$3129$8fcfb975@news.wanadoo.fr>

+1



Michel Claveau





From steve at holdenweb.com  Wed Apr  6 16:17:56 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 06 Apr 2005 16:17:56 -0400
Subject: Python sleep doesn't work right in a loop?
In-Reply-To: <1112816991.860177.68420@l41g2000cwc.googlegroups.com>
References: <1112814877.560518.229530@z14g2000cwz.googlegroups.com>	<d31ctj$jp9$02$1@news.t-online.com>
	<1112816991.860177.68420@l41g2000cwc.googlegroups.com>
Message-ID: <d31g14$om$1@sea.gmane.org>

ritterhaus at yahoo.com wrote:
> Nope. Does't work. Running Python 2.3.4 on Debian, Linux kernel 2.6.
> This is actually test code for a larger project...
> 
> # flash the selected wx.TextControl
> 
> for flasher in range(4):
>     self.textField.SetBackgroundColour(255, 0, 0)
>     time.sleep(0.8)
>     self.textField.SetBackgroundColour(255, 255, 223)
>     time.sleep(0.8)
> 
> Even when I add an explicit call to repaint the TextCtrl between each
> sleep, things appear to be 'queued' until after the loop is fnished.
> Very bizarre.
> 
Not at all, but completely unrelated to your initial question.

You need to use a specific call before each sleep to tell wxPython to 
update the display, since the sleep doesn't give control back to the 
display subsystem. I think the call you need is app.Yield(), but the 
docs will confirm that.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From henrikpierrou at hotmail.com  Tue Apr 19 11:27:28 2005
From: henrikpierrou at hotmail.com (henrikpierrou at hotmail.com)
Date: 19 Apr 2005 08:27:28 -0700
Subject: Extending base class methods
In-Reply-To: <mailman.2103.1113920477.1799.python-list@python.org>
References: <1113919270.802463.54310@l41g2000cwc.googlegroups.com>
	<mailman.2103.1113920477.1799.python-list@python.org>
Message-ID: <1113924448.132914.94300@g14g2000cwa.googlegroups.com>

Ok, i'll try that. But what about the recommendation in the tutorial,
is that not possible?

/H



From bokr at oz.net  Wed Apr 27 10:11:17 2005
From: bokr at oz.net (Bengt Richter)
Date: Wed, 27 Apr 2005 14:11:17 GMT
Subject: names of methods, exported functions
References: <1114592521.726967.320810@o13g2000cwo.googlegroups.com>
	<d4nmv1$f5d$1@gemini.csx.cam.ac.uk>
Message-ID: <426f9552.44993106@news.oz.net>

On Wed, 27 Apr 2005 10:45:05 +0100, Michael Hoffman <cam.ac.uk at mh391.invalid> wrote:

>Mayer wrote:
>
>> Is there a way to see at the python prompt the names of all the public
>> methods of a class or the names exported by a module? I know that
>> GUI-based IDEs have a nifty way of displaying these in the form of a
>> drop-down list, but I'm looking for some function or method that will
>> simply return a list of strings.
>
>Modules generally do not export names[1]. You import a module and 
>perhaps specific names within the module. The module can specify which 
>names are "public" by the use of the underscore naming convention and 
>the magic __all__ name, which can contain a list of those names which 
>will be imported by default through "from module import *."
>
>That said, dir() is the function you are looking for. If you want to 
>restrict to only methods on the class, and not just all attributes, 
>you'll have to check the type of each attribute.

A few more hints for the OP:

Don't forget that dir(thing) gets you all the inherited methods of thing as well.
To limit it to the attribute names of thing, use vars(thing).keys(). If thing
is a class, that will show the methods. If thing is an instance, it will show
instance attribute names, so if you want the immediate class methods, use
vars(type(thing)).keys(). If you want gobs of info use help(thing).
E.g., if you have your own class Foo like

 >>> class Foo(list):
 ...     def mrev(self): return Foo(reversed(self))
 ...     def msor(self): return sorted(self)
 ...
 >>> foo = Foo('zvbac')
 >>> foo
 ['z', 'v', 'b', 'a', 'c']
 >>> foo.mrev()
 ['c', 'a', 'b', 'v', 'z']
 >>> foo.msor()
 ['a', 'b', 'c', 'v', 'z']


The short form:

 >>> vars(Foo).keys()
 ['__module__', 'mrev', 'msor', '__dict__', '__weakref__', '__doc__']

Using dir():

 >>> dir(Foo)
 ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__delslice__', '__dict__
 ', '__doc__', '__eq__', '__ge__', '__getattribute__', '__getitem__', '__getslice__', '__gt__', '
 __hash__', '__iadd__', '__imul__', '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mod
 ule__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__
 ', '__rmul__', '__setattr__', '__setitem__', '__setslice__', '__str__', '__weakref__', 'append',
  'count', 'extend', 'index', 'insert', 'mrev', 'msor', 'pop', 'remove', 'reverse', 'sort']

Using help: (BTW, it would be nice to have some keyword arguments for help to filter down
information to exclude what may not be interesting)

 >>> help(Foo)
 Help on class Foo in module __main__:
 
 class Foo(__builtin__.list)
  |  Method resolution order:
  |      Foo
  |      __builtin__.list
  |      __builtin__.object
  |
  |  Methods defined here:
  |
  |  mrev(self)
  |
  |  msor(self)
  |
  |  ----------------------------------------------------------------------
  |  Data and other attributes defined here:
  |
  |  __dict__ = <dictproxy object>
  |      dictionary for instance variables (if defined)
  |
  |  __weakref__ = <attribute '__weakref__' of 'Foo' objects>
  |      list of weak references to the object (if defined)
  |
  |  ----------------------------------------------------------------------
  |  Methods inherited from __builtin__.list:
  |
  |  __add__(...)
  |      x.__add__(y) <==> x+y
  |
  |  __contains__(...)
  |      x.__contains__(y) <==> y in x
  |
  |  __delitem__(...)
  |      x.__delitem__(y) <==> del x[y]
  |
  |  __delslice__(...)
  |      x.__delslice__(i, j) <==> del x[i:j]
  |
  |      Use of negative indices is not supported.
  |
  |  __eq__(...)
  |      x.__eq__(y) <==> x==y
  |
  |  __ge__(...)
  |      x.__ge__(y) <==> x>=y
  |
  |  __getattribute__(...)
  |      x.__getattribute__('name') <==> x.name
  |
  |  __getitem__(...)
  |      x.__getitem__(y) <==> x[y]
  |
  |  __getslice__(...)
  |      x.__getslice__(i, j) <==> x[i:j]
  |
  |      Use of negative indices is not supported.
  |
  |  __gt__(...)
  |      x.__gt__(y) <==> x>y
  |
  |  __hash__(...)
  |      x.__hash__() <==> hash(x)
  |
  |  __iadd__(...)
  |      x.__iadd__(y) <==> x+=y
  |
  |  __imul__(...)
  |      x.__imul__(y) <==> x*=y
  |
  |  __init__(...)
  |      x.__init__(...) initializes x; see x.__class__.__doc__ for signature
  |
  |  __iter__(...)
  |      x.__iter__() <==> iter(x)
  |
  |  __le__(...)
  |      x.__le__(y) <==> x<=y
  |
  |  __len__(...)
  |      x.__len__() <==> len(x)
  |
  |  __lt__(...)
  |      x.__lt__(y) <==> x<y
  |
  |  __mul__(...)
  |      x.__mul__(n) <==> x*n
  |
  |  __ne__(...)
  |      x.__ne__(y) <==> x!=y
  |
  |  __repr__(...)
  |      x.__repr__() <==> repr(x)
  |
  |  __reversed__(...)
  |      L.__reversed__() -- return a reverse iterator over the list
  |
  |  __rmul__(...)
  |      x.__rmul__(n) <==> n*x
  |
  |  __setitem__(...)
  |      x.__setitem__(i, y) <==> x[i]=y
  |
  |  __setslice__(...)
  |      x.__setslice__(i, j, y) <==> x[i:j]=y
  |
  |      Use  of negative indices is not supported.
  |
  |  append(...)
  |      L.append(object) -- append object to end
  |
  |  count(...)
  |      L.count(value) -> integer -- return number of occurrences of value
  |
  |  extend(...)
  |      L.extend(iterable) -- extend list by appending elements from the iterable
  |
  |  index(...)
  |      L.index(value, [start, [stop]]) -> integer -- return first index of value
  |
  |  insert(...)
  |      L.insert(index, object) -- insert object before index
  |
  |  pop(...)
  |      L.pop([index]) -> item -- remove and return item at index (default last)
  |
  |  remove(...)
  |      L.remove(value) -- remove first occurrence of value
  |
  |  reverse(...)
  |      L.reverse() -- reverse *IN PLACE*
  |
  |  sort(...)
  |      L.sort(cmp=None, key=None, reverse=False) -- stable sort *IN PLACE*;
  |      cmp(x, y) -> -1, 0, 1
  |
  |  ----------------------------------------------------------------------
  |  Data and other attributes inherited from __builtin__.list:
  |
  |  __new__ = <built-in method __new__ of type object>
  |      T.__new__(S, ...) -> a new object with type S, a subtype of T
 
 >>>
 

Regards,
Bengt Richter


From beliavsky at aol.com  Tue Apr  5 15:37:03 2005
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 5 Apr 2005 12:37:03 -0700
Subject: Best editor?
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <1112729823.852393.107000@o13g2000cwo.googlegroups.com>

ChinStrap wrote:
> When not using the interactive prompt, what are you using? I keep
> hearing everyone say Emacs, but I can't understand it at all. I keep
> trying to learn and understand why so many seem to like it because I
> can't understand customization even without going through a hundred
> menus that might contain the thing I am looking for (or I could go
> learn another language just to customize!).

Epsilon http://www.lugaru.com/ is a commercial Emacs-like editor with a
built-in Python mode and will automatically treat .py files as being
Python. No fiddling is required. It works well, and I spend many of my
waking hours in front of an Epsilon (even created a Fortran mode :)). I
think Epsilon is used more on Windows than Linux/Unix, where Emacs and
XEmacs have existed for a long time, but an Epsilon license contains
binaries for Linux and other Unices as well.

XEmacs/Emacs frustrate me, for example constantly asking if I want to
enable a "recursive mini-buffer", which I have no clue about or
interest in. Epsilon is a well-done Emacs IMO.

A key benefit of Emacs-like editors, including Epsilon, is that one can
run the shell (cmd.exe prompt on Windows, bash/csh/ksh on Unix) from
within the editor. One can fill the entire screen with an Emacs, split
it into buffers for source codes and a shell, and live happily ever
after :). Standard output is not lost but can be retrieved just by
scrolling up in the editor. I am addicted to running a shell within an
Emacs-like editor.

Of course there are many good editors -- don't feel obligated to use
Emacs if you are happy and productive with something else.



From bokr at oz.net  Sun Apr 17 23:10:14 2005
From: bokr at oz.net (Bengt Richter)
Date: Mon, 18 Apr 2005 03:10:14 GMT
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
	<4260bc72.67216001@news.oz.net>
	<Pine.A41.4.61b.0504161733560.72462@dante72.u.washington.edu>
	<4261da60.140413834@news.oz.net>
	<Pine.A41.4.61b.0504171520150.232474@dante76.u.washington.edu>
Message-ID: <42631b5e.222587914@news.oz.net>

On Sun, 17 Apr 2005 15:32:56 -0700, Brian Sabbey <sabbey at u.washington.edu> wrote:

>Bengt Richter wrote:
>> Hm, one thing my syntax does, I just noticed, is allow you
>> to pass several thunks to a thunk-accepter, if desired, e.g.,
>> (parenthesizing this time, rather than ending ():<suite> with
>> dedented comma)
>>
>>    each(
>>        ((i):  # normal thunk
>>            print i),
>>        ((j):  # alternative thunk
>>            rejectlist.append(j)),
>>        [1,2])
>>
>> <snip>
>>
>
>I see that it might be nice to be able to use multiple thunks, and to be 
>able to specify the positions in the argument list of thunks, but I think 
>allowing a suite inside parentheses is pretty ugly.  One reason is that it 
>is difficult to see where the suite ends and where the argument list 
>begins again.  I'm not sure even what the syntax would be exactly.  I 
>suppose the suite would always have to be inside its own parentheses? 
>Also, you wind up with these closing parentheses far away from their 
>corresponding open parentheses, which is also not pretty.  It's getting 
>too Lisp-like for my tastes.
>
Having had a past love affair (or at least fling) with scheme,
that doesn't bother me so much ;-)

The "where" specifier syntax might help, e.g.,
      
      each(thk1, thk2, [1, 2]) where:
           thk1 = (i):  # normal thunk
              print i
           thk2 = (j):  # alternative thunk
              rejectlist.append(j)

This still uses my (<arglist>):<suite> expression for thunks
but they don't need to be parenthesized, because their suites
terminate with normal dedenting under the where: suite

I.e., the 'p' of 'print i' is the left edge of the (i): suite
and thus the 't' of 'thk2 = ...' ends the (i): suite. The (j): suite
left edge is at the 'r' of 'rejectlist'... so anything to the left
of that (excluding comments) will end the (j): suite, like normal
indentation.

I could have used dedent termination in the previous example too
by moving the commas around to let them trigger dedent level out of
the preceding suite, e.g., with args evaluated in place again:

      each((i):                     # normal thunk
              print i
          ,(j):                     # alternative thunk
              rejectlist.append(j)
          ,[1,2])

Of course, if you want lispy, the above simple thunks can be done in a oneliner:

      each(((i):print i), ((j):rejectlist.append(j)), [1,2])

I personally like the power of being able to write that, but given a clean sugar
alternative, I would use it. But if it's an exclusive-or choice, I'll take primitives
over sugar, because sugar never covers all the useful combinations of primitives that
will turn up later.

Regards,
Bengt Richter


From austin at maxtronic.com.tw  Thu Apr  7 01:43:34 2005
From: austin at maxtronic.com.tw (Austin)
Date: Thu, 7 Apr 2005 13:43:34 +0800
Subject: How to detect windows shutdown
References: <d303gk$btk$1@netnews.hinet.net>
	<F8WdnZpmZN6pc87fRVn-hQ@powergate.ca>
Message-ID: <d32h4q$ifh$1@netnews.hinet.net>

I wrote a GUI program with wxPython.
The error message is:

Unhandled exception
An unhandled exception occured. Press "Abort" to terminate the program, 
"Retry" to exit the program normally and "Ignore" to try to continue.

Actually, besides the main program, there is another thread running 
background.




> Austin wrote:
>> I wrote a program running on windows.
>> I put the link of the program in "Start up" folder and let it executed 
>> minimized.
>> Every time when I open the computer, my program will be running in system 
>> tray.
>>
>> But if the user would like to shutdown the computer, the OS will show an 
>> error about exception.
>
> Important missing information:  is this a GUI program or
> a console program, and if it's a GUI program, what framework
> did you use to write it (wxPython, PyQt, other...)?  Also,
> what is the exception that you got?  (Always report the
> specific error: we can't guess what exception you got,
> and the answer could well point directly to a cause that
> is different than you think it is.)
>
> -Peter 




From bucknuggets at yahoo.com  Tue Apr 12 17:27:03 2005
From: bucknuggets at yahoo.com (Buck Nuggets)
Date: 12 Apr 2005 14:27:03 -0700
Subject: database in python ?
In-Reply-To: <1113339252.851450.184620@z14g2000cwz.googlegroups.com>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
	<mailman.1684.1113228968.1799.python-list@python.org>
	<1113333625.215786.198580@l41g2000cwc.googlegroups.com>
	<1113339252.851450.184620@z14g2000cwz.googlegroups.com>
Message-ID: <1113341223.577883.66810@f14g2000cwb.googlegroups.com>

> It's not a bug if you didn't RTFM.

Maybe it's not a bug if it's the only DBMS you've ever used and you
actually believe that overriding explicit & critical declaratives is a
valid "design choice".  But it is a bug if it's still only partially
supported in a beta version that nobody is yet hosting.

But maybe this release will actually fix ten years of negligence in one
fell swoop - and all these issues will be easily eliminated.  But just
in case that turns out to be difficult, and there's some reason it has
taken all this time to achive, just wait and see what this guys finds:
   http://sql-info.de/mysql/gotchas.html

BTW, you should upgrade, they're now on 5.0.3.  Their support site
appears to be down right now (timeouts) so I can't check the new bug
list, but since 5.0.2 is beta, it may have introduced more problems
than it solved.

buck



From reinhold-birkenfeld-nospam at wolke7.net  Sun Apr 17 12:24:00 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sun, 17 Apr 2005 18:24:00 +0200
Subject: re module methods: flags(), pattern()
In-Reply-To: <1113750473.663610.172200@z14g2000cwz.googlegroups.com>
References: <1113750473.663610.172200@z14g2000cwz.googlegroups.com>
Message-ID: <3cfgt0F6mrr8cU1@individual.net>

Xah Lee wrote:
> Python re module has methods flags and pattern. How to use these
> exactly?
> 
> e.g. i tried
> 
> print patternObj.flags()
> 
> and the error is some "int object is not callable".

Where do you read "methods"?

Reinhold


From sunnan at handgranat.org  Sat Apr  2 07:05:04 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sat, 02 Apr 2005 12:05:04 GMT
Subject: Ternary Operator in Python
In-Reply-To: <d2l41q$ess$1@news1.ucsd.edu>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com><mailman.1198.1112380413.1799.python-list@python.org>	<1112391650.018826.274970@l41g2000cwc.googlegroups.com>
	<mailman.1212.1112398120.1799.python-list@python.org>
	<2po3e.21052$d5.156184@newsb.telia.net>
	<d2l41q$ess$1@news1.ucsd.edu>
Message-ID: <QTv3e.133896$dP1.471331@newsc.telia.net>

Robert Kern wrote:
> Sunnan wrote:
>> (((0.0 < a) < 1.0) < b ) < 2.0
> 
> 
> Go on. Try it with a bunch of different values.
> 
My bad. (Of course. The subexpressions must return booleans, not the 
largest number. It couldn't work any other way.) Egg on my face, and all 
that (figuratively speaking).

Not used to infix...


From steve at ferg.org  Sun Apr 24 18:02:53 2005
From: steve at ferg.org (Steve)
Date: 24 Apr 2005 15:02:53 -0700
Subject: kickoff -- wikalong documentation for Python
Message-ID: <1114380173.391872.49690@f14g2000cwb.googlegroups.com>

I've kicked off wikalong documentation for Python by adding an example
program to the documentation for the HTMLParser module. See
http://python.org/doc/current/lib/module-HTMLParser.html

(Generally, I think most wikalong annotations won't take the form of
complete example programs, but this was an entry that I thought could
use one.)

For more information about Wikalong, see http://www.wikalong.org/.  If
you haven't played with Wikalong yet, I urge you to investigate it.
Wikalong basically allows you to annotate any URL.  With Wikalong and
the Python docs, Pythonistas can experiment with annotatable Python
documentation (and ride the leading edge of the Wikalong wave).

Thanks to Aahz for identifying http://python.org/doc/current/ as the
best candidate for official URL of the current version of the docs. For
more information, see the thread at
http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/96fb7f21014d7a16/430b6e32bd3c4a64?q=ferg+wikalong&rnum=1#430b6e32bd3c4a64



From tjreedy at udel.edu  Thu Apr  7 17:47:07 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 7 Apr 2005 17:47:07 -0400
Subject: Lambda: the Ultimate Design Flaw
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu><mailman.1222.1112417820.1799.python-list@python.org><d2vhi8$k29$1@panix1.panix.com><mailman.1429.1112794393.1799.python-list@python.org><d33ij3$9jj$1@panix2.panix.com>
	<20050407160342.GA16831@phenix.progiciels-bpi.ca>
Message-ID: <d349kd$r58$1@sea.gmane.org>


"Fran?ois Pinard" <pinard at iro.umontreal.ca> wrote in message 
news:20050407160342.GA16831 at phenix.progiciels-bpi.ca...

>To summarize, instead of saying "Python has only one way to do it",

As I explained in response to Aahz, what Tim Peters wrote was that Python 
'should preferably have only one obvious way to do it'.  Omission of the 
crucial qualifiers 'should preferably' and 'obvious' misleads any 
discussion.

>rather say "Python will eventually have only one way to do it",
> and with such a wording, nobody will not be mislead.

The actual design principle, as opposed to the impossible 
oversimplification, does not, in my opinion, mislead.  It is applied to 
every new proposal, most of which get rejected.  What I can't tell is 
whether you wish Python had added less new stuff or had already dumped more 
old stuff.  For myself, I wish the next version would be 3.0 and slimmed 
down a bit.

Terry J. Reedy





From DyRanch at gmail.com  Wed Apr 13 08:04:52 2005
From: DyRanch at gmail.com (SamIam)
Date: 13 Apr 2005 05:04:52 -0700
Subject: for line in file weirdness
References: <1113388411.589754.82600@f14g2000cwb.googlegroups.com>
Message-ID: <1113393892.784115.79720@o13g2000cwo.googlegroups.com>

I think what you need to do is to have a nested if_else statment:
for line in filelines:
        if some_condition : break
        else: do_something_else

If the if statment is excuted then break return to for_loop
else do something different then return to for_loop.
    When I read from a file I read the whole file into a variable then
work form the variable

file = open('InputString','r')                              # open file
for reading only
filelines = map(string.strip,file.readlines())      #remove newlines
for string

Then you can just use the variable filelines and loop through as much
as you like. If I can help you can email me at servando at mac.com
I also use SKYPE username servando_garcia
Hope this helped.

Cordula's Web wrote:
> Hello,
>
> here's a strange bug (?) I've came across (using Python 2.2):
>
> # loop_1
> for line in file:
>     if some_condition(line): break
>     do_something()
>
> # loop_2
> for line in file:
>     do_something_else()
>
> The problem is, that loop_2 doesn't resume where loop_1 left off, but
> skips many lines (a block's worth or so) before continuing.
>
> Why is this? Is reading from a file non-reentrant?
>
> It is always possible to slurp the whole file content into a list,
and
> then iterate through the list, but I want to handle HUGE files too.
>
> Thanks,
> -cpghost.
> 
> -- 
> Cordula's Web. http://www.cordula.ws/



From harlinseritt at yahoo.com  Tue Apr 26 15:59:25 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 26 Apr 2005 12:59:25 -0700
Subject: Getting the sender widget's name in function (Tkinter)
Message-ID: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>

I have the following script. Two widgets call the same function. How
can I tell inside of the called function which button called it?:

def say_hello():
   print 'hello!'
   print widget['text']

root = Tk()
button1 = Button(root, text='Button 1', command=say_hello)
button1.pack()
button2 = Button(root, text='Button 2', command=say_hello)
button2.pack()
root.mainloop()

Thanks,

Harlin Seritt



From correiajREMOVECAPS at hotmail.com  Thu Apr 28 15:55:30 2005
From: correiajREMOVECAPS at hotmail.com (J Correia)
Date: Thu, 28 Apr 2005 19:55:30 GMT
Subject: Internet Explorer, COM+, Javascript and Python
References: <1114609311.916761.272980@f14g2000cwb.googlegroups.com>
	<4270c6ed$1_2@127.0.0.1>
Message-ID: <Scbce.8946$HR1.3324@clgrps12>


"Roger Upole" <rupole at hotmail.com> wrote in message
news:4270c6ed$1_2 at 127.0.0.1...
> Something like this should be close:
>
> import win32com.client, pythoncom
> ie=win32com.client.Dispatch('internetexplorer.application')
> ie.Visible=1
> ie.Navigate('somepagewithjavascript.html')
> id=ie.Document.Script._oleobj_.GetIDsOfNames('somejsfunction')
> res=ie.Document.Script._oleobj_.Invoke(id, 0, pythoncom.DISPATCH_METHOD,
> True, <parameter or tuple of parameters> )
>
>    hth
>        Roger

Yes, that definitely works.  Only one minor correction:  it seems that to
pass multiple parameters you need to pass them sequentially seperated by
commas instead of in a tuple, i.e.
res=ie.Document.Script._oleobj_.Invoke(id, 0, pythoncom.DISPATCH_METHOD,
True, param1, param2, param3, ......... )

Useful test sitefor above code:
http://www.cpplab.com/Articles/JSCalls/TestPage/JSCallTestPage.htm

HTH,

>
>
> "Ishpeck" <ishpeck at gmail.com> wrote in message
> news:1114609311.916761.272980 at f14g2000cwb.googlegroups.com...
> >I need to make IE execute javascript in a web page with COM+ and
> > Python.
> >
> > Similarly to the way they do it in this article. . .
> >
> > http://www.codeproject.com/com/jscalls.asp
> >
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption
=----





From tjreedy at udel.edu  Tue Apr 12 10:59:15 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 12 Apr 2005 10:59:15 -0400
Subject: Programming Language for Systems Administrator
References: <1113253691.821235.9750@o13g2000cwo.googlegroups.com><op.so37qgvcqfv3if@localhost>
	<1113311618.838281.205380@l41g2000cwc.googlegroups.com>
Message-ID: <d3gnia$b7r$1@sea.gmane.org>


"Kanthi Kiran Narisetti" <TechAlerts at gmail.com> wrote in message 
news:1113311618.838281.205380 at l41g2000cwc.googlegroups.com...
>.Some of my questions
> regarding the same follows.

Most of these have been discussed many times.  You can use Google to search 
the archives of this newsgroup.  I strongly recommend that you learn to use 
that resource.

> 1)Can i build web applications in Python ? If so how. I am planning to
> build a web application for intranet use which deals with workflow of
> Internal office communication.

Yes, see Google

> 2)Which is best opensource database to be used with Python ?

Currently being debated in another thread.  See Google for previous 
discussions.

> 3)When i write a remote execution script in python is it required that
> python should be installed in remote system.

Yes.  I think there are a couple of options that have been discussed.

Terry J. Reedy





From mahs at telcopartners.com  Sun Apr  3 17:43:36 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 03 Apr 2005 14:43:36 -0700
Subject: "specialdict" module
In-Reply-To: <3bb433F6fn6t3U1@individual.net>
References: <3bamhhF6j009lU1@individual.net>	<mailman.1264.1112560102.1799.python-list@python.org>
	<3bb433F6fn6t3U1@individual.net>
Message-ID: <d2po18$fcs$1@sea.gmane.org>

Georg Brandl wrote:

> 
> I think I like Jeff's approach more (defaultvalues are just special
> cases of default factories); there aren't many "hoops" required.
> Apart from that, the names just get longer ;)

Yes Jeff's approach does simplify the implementation and more-or-less eliminates 
my complexity objection

But why do you write:

     def __getitem__(self, key):
         try:
             return super(defaultdict, self).__getitem__(key)
         except KeyError, err:
             try:
                 return self.setdefault(key,
                           self._default[0](*self._default[1],
                                            **self._default[2]))
             except KeyError:
                 raise err

rather than:

     def __getitem__(self, key):
         return self.setdefault(key,
                           self._default[0](*self._default[1],
                                            **self._default[2]))

(which could catch AttributeError in the case of _default not set)
I'm sure there's a reason, but I can't see it.

> 
> 
>>2. I would really prefer to have the default value specified in the constructor
...
> 
> Too much specialcased for my liking.
> 
It does set up some gotchas I concede ;-)

> 
...
> 
>>Alternatively, you could provide factory functions to construct the defaultdict. 
>>  Someone (Michele?) recently posted an implementation of this
> 
> 
> Yes, I think this could be reasonable.


...though this would more naturally complement a fixed-default dictionary IMO
Your design permits - even encourages (by providing convenient setters) the 
default to change over the lifetime of the dictionary.  I'm not sure whether 
that's good or bad, but it's a feature worth discussing.

>>3. Can you work in the tally and listappend methods that started this whole 
>>thread off?
> 
> 
> They aren't necessary any longer.
> 
> Use defaultdict.setdefaultvalue(0) instead of the tally approach and
> defaultdict.setdefaultfactory(list) instead of listappend.

Oops, I see what you mean... then use += or append as required.  I still prefer 
the clarity of tally for its specific use-case, but it does suffer from lack of 
generality.

Michael



From petite.abeille at gmail.com  Tue Apr  5 11:15:11 2005
From: petite.abeille at gmail.com (PA)
Date: Tue, 5 Apr 2005 17:15:11 +0200
Subject: Web application toolkit recommendation?
In-Reply-To: <d4c0d480050404170177c7e94b@mail.gmail.com>
References: <d4c0d480050404170177c7e94b@mail.gmail.com>
Message-ID: <f0afe7cf489d77fd978586286aae9d5c@gmail.com>


On Apr 05, 2005, at 02:01, Stewart Midwinter wrote:

> I don't want to hear anything about Zope - it's way too complex for my
> needs or desires. Other than that, fire away!

I have an inexplicable attraction to CherryPy. Perhaps something to do 
with its name 8^)

http://www.cherrypy.org/
http://www.cherrypy.org/wiki/CherryPyTutorial

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From tim.peters at gmail.com  Fri Apr  8 09:49:30 2005
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 8 Apr 2005 09:49:30 -0400
Subject: Positions of regexp groups
In-Reply-To: <slrnd5d153.7ht.mlh@selje.idi.ntnu.no>
References: <slrnd5d153.7ht.mlh@selje.idi.ntnu.no>
Message-ID: <1f7befae05040806492f7f526c@mail.gmail.com>

[Magnus Lie Hetland]
> Just a quick question: Does anyone have a simple way of finding the
> positions (start, end) of the groups in a regexp match? AFAICS, the re
> API can only return the contents...?

Read the docs for match objects, esp. the start(), end(), and span() methods.


From fredrik at pythonware.com  Fri Apr 15 13:07:31 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 15 Apr 2005 19:07:31 +0200
Subject: How to fix this error in the example in 6.1.4 Files and
	Directories
References: <1113583932.703797.118610@o13g2000cwo.googlegroups.com>
Message-ID: <d3os4r$vib$1@sea.gmane.org>

<jarrod.roberson at gmail.com> wrote:

> the following code is from the Python 2.3.5 docs (
> http://www.python.org/doc/2.3.5/lib/os-file-dir.html )
>
> import os
> from os.path import join, getsize
> for root, dirs, files in os.walk('python/Lib/email'):
>    print root, "consumes",
>    print sum([getsize(join(root, name)) for name in files]),
>    print "bytes in", len(files), "non-directory files"
>    if 'CVS' in dirs:
>        dirs.remove('CVS')  # don't visit CVS directories
>
> every time I try and run it I get the following error
>
>    print sum([getsize(join(root,name)) from name in files]),
>                                           ^

if you're using examples from the 2.3.5 documentation, maybe you
shouldn't run them under 1.5.2...

(the code you included runs just fine on Python 2.3 and 2.4 on my
machine.   under Python 2.0 and 2.1 and 2.2, it complains about a
missing "walk" function.  in Python 1.5.2, it gives a syntax error that
looks a lot like the one you included, except that you didn't include
the actual error message...)

</F> 





From siona at chiark.greenend.org.uk  Fri Apr  8 06:36:14 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 08 Apr 2005 11:36:14 +0100 (BST)
Subject: curious problem with large numbers
References: <723eb693050407124816431b6a@mail.gmail.com>
	<d34euk$9um$1@sea.gmane.org>
	<mailman.1515.1112932758.1799.python-list@python.org>
Message-ID: <+Tr*NEzLq@news.chiark.greenend.org.uk>

Michael Spencer  <mahs at telcopartners.com> wrote:
>Terry Reedy wrote:
>> "Chris Fonnesbeck" <fonnesbeck at gmail.com> wrote
>>>However, on Windows (have tried on Mac, Linux) I get the following 
>>>behaviour:
>>>>>>inf = 1e10000
>>>>>>inf
>>>1.0
>> On my Windows machine with 2.2.1, I get exactly what you expected:
>>>>>1e10000
>> 1.#INF
>On my Windows machine, both 2.3.3 and 2.4 give the same (expected) result:
>  >>> 1e10000
>  1.#INF

Likewise for me with 2.3.2 (W2K on a PIII). I'm not going to do a
cut and paste because it's exactly the same as everyone else's,
and anyway I'm typing this at my Linux machine.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From ptmcg at austin.rr.com  Thu Apr 21 11:53:20 2005
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 21 Apr 2005 08:53:20 -0700
Subject: recording data between [ and ]
In-Reply-To: <1114097769.446445.70210@g14g2000cwa.googlegroups.com>
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
	<d48cpb$hij$1@solaris.cc.vt.edu>
	<1114097769.446445.70210@g14g2000cwa.googlegroups.com>
Message-ID: <1114098800.093195.211220@o13g2000cwo.googlegroups.com>

Jay -

Thanks for the pyparsing plug.

Here is how the OP's program would look using pyparsing:


import pyparsing

fp = file('filename')
data = fp.read()
fp.close()

foo = '''stuff   [lsass.exe]
[System]  more stuff
xxxxx [firefox.exe] ......
'''

LBRACK = pyparsing.Literal("[").suppress()
RBRACK = pyparsing.Literal("]").suppress()
brackettedStuff = LBRACK + pyparsing.SkipTo( RBRACK ) + RBRACK

for tokens,start,end in brackettedStuff.scanString( foo ):
    print tokens[0]

--- fin ---
Now this is not nearly as terse as the regexp version, nor will it run
as fast.  But I think I'd rather come back to this version 6 months
from now and try to figure "what was this program doing again?".

-- Paul



From kent37 at tds.net  Wed Apr 20 13:22:14 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 20 Apr 2005 13:22:14 -0400
Subject: Faster os.walk()
In-Reply-To: <1114016094.531694.117130@z14g2000cwz.googlegroups.com>
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
	<mailman.2181.1114012135.1799.python-list@python.org>
	<dqCdneACDr5-5vvfRVn-tA@powergate.ca>
	<1114016094.531694.117130@z14g2000cwz.googlegroups.com>
Message-ID: <42668b84_3@newspeer2.tds.net>

fuzzylollipop wrote:
> after extensive profiling I found out that the way that os.walk() is
> implemented it calls os.stat() on the dirs and files multiple times and
> that is where all the time is going.

os.walk() is pretty simple, you could copy it and make your own version that calls os.stat() just 
once for each item. The dirnames and filenames lists it yields could be lists of (name, 
os.stat(path)) tuples so you would have the sizes available.

Kent


From philippe at philippecmartin.com  Mon Apr 25 15:44:41 2005
From: philippe at philippecmartin.com (Philippe C. Martin)
Date: Mon, 25 Apr 2005 19:44:41 GMT
Subject: cross platform printing - using a GUI ?
References: <0hx4e.3479$3O2.2184@trnddc01>
	<mVa5e.6469$6k4.803027@news20.bellglobal.com>
	<1GYae.2601$Nc.903@trnddc05>
Message-ID: <JMbbe.274$gd5.215@newssvr12.news.prodigy.com>

If you're in need of a GUI, then wxPython might be your cross-platform
printing solution.

Regards,

Philippe



David Isaac wrote:

>> Alan Isaac wrote:
>> > What is the current best practice for cross platform printing of
> PostScript
>> > files from Python?
> 
> "Warren Postma" <wp at tekran.spammenziemichnichtdankeschon.com> wrote in
> message news:mVa5e.6469$6k4.803027 at news20.bellglobal.com...
>> Well since printing postscript files on most Unix systems (probably
>> including Mac OSX although I don't really know this for sure) is
>> trivially easy, why not investigate using cygwin  on Windows and
>> launching an "lpr" task from your python script that prints the given
>> postscript file. Implementation time on Unix: 0 minutes, 0 seconds.
>> Implementation time on Windows; the time it takes make a cygwin batch
>> file that prints using ghostscript.
> 
> I meant something that application users on different platforms can print
> with, not something
> that they could coerce a platform into supporting given enough energy
> (e.g., via Cygwin).
> The closest to an option so far seems to be to generate PDF and assume an
> application is available to print it.  Not beautiful.
> 
> Alan Isaac



From seefeld at sympatico.ca  Wed Apr 13 09:53:38 2005
From: seefeld at sympatico.ca (Stefan Seefeld)
Date: Wed, 13 Apr 2005 09:53:38 -0400
Subject: domain specific UI languages
In-Reply-To: <MNc7e.1229125$35.44994692@news4.tin.it>
References: <MNc7e.1229125$35.44994692@news4.tin.it>
Message-ID: <71d7e.14516$8i6.439934@news20.bellglobal.com>

max(01)* wrote:
> hi.
> 
> in a previous thread, mr lundh talks about the possibility to create 
> "domain specific UI languages" using tkinter.
> 
> can he (or anyone else who pleases) explain what they are? give some 
> examples (simple is better)?

Without having read the original thread, I imagine such a beast to
be used to easily script common UI tasks such as dialogs.

Things to express in such a context are

* GUI structure
* simple callbacks and their relation to events
* some styling

I'v done some GUI prototyping in a former life using a combination of
Python, XML, and CSS.
Popular examples of such languages include XUL (mozilla), Javascript,
and similar.

HTH,
		Stefan


From http  Fri Apr 29 03:00:31 2005
From: http (Paul Rubin)
Date: 29 Apr 2005 00:00:31 -0700
Subject: large dictionary creation takes a LOT of time.
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
Message-ID: <7xy8b2nk34.fsf@ruckus.brouhaha.com>

"possibilitybox" <possibilitybox at gmail.com> writes:

> this code here:
> 
> 
> def wordcount(lines):
>     for i in range(len(lines)/8):
>         words = lines[i].split(" ")
>         if not locals().has_key("frequency"):
>             frequency = {}
>         for word in words:
>             if frequency.has_key(word):
>                 frequency[word] += 1
>             else:
>                 frequency[word] = 1
>     return frequency
> wordcount(lines)
> 
> is taking over six minutes to run on a two megabyte text file.  i
> realize that's a big text file, a really big one (it's actually the
> full text of don quixote.).  i'm trying to figure out how.  is there a
> better way for me to do a frequency count of all the words in the text?

2MB is not that large.  Your method is ok and shouldn't be that slow
unless you're on a pretty slow PC.  Could your machine be short of
memory and paging a lot?  You could tweak the code somewhat by moving
the initialization of the frequency dict out of the loop and combining
a few other statements.  Also you should use xrange instead of range,
to avoid allocating a big list in memory:

    def wordcount(lines):
        frequency = {}
        for i in xrange(len(lines)/8):
            for word in lines[i].split():
                frequency[word] = 1 + frequency.get(word, 0)
        return frequency
    wordcount(lines)

>  it seems to me like this should scale linearly, but perhaps it isn't?
> i don't know much about algorithmic complexity.  if someone could give
> a breakdown of this functions complexity as well i'd be much obliged.

It should be close to linear, or at worst n log n, depending on what
happens when dicts have to be enlarged as the # of elements increases.
Why are you only processing 1/8th of the lines?


From jenkins.usenet at gmail.com  Tue Apr 12 18:12:53 2005
From: jenkins.usenet at gmail.com (Tom Jenkins)
Date: 12 Apr 2005 15:12:53 -0700
Subject: problem with the logic of read files
References: <68da8$425bf954$43461874$29054@nf1.news-service.com>
	<425c09f8$1@nntp0.pdx.net>
Message-ID: <1113343973.904761.204640@o13g2000cwo.googlegroups.com>

You may also be interested in the biopython project:
http://www.biopython.org/

tom



From peter at engcorp.com  Tue Apr  5 09:13:57 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 05 Apr 2005 09:13:57 -0400
Subject: raw sockets please
In-Reply-To: <mailman.1347.1112668687.1799.python-list@python.org>
References: <mailman.1347.1112668687.1799.python-list@python.org>
Message-ID: <F6idnRSbaJ2IEs_fRVn-2g@powergate.ca>

ionel wrote:
> anyone got any idea how the get raw sockets working on win32 ? (on python 2.4)

No, but I'm certain this has been asked and
answered many times in the past.  Maybe you
could use Google Groups and search the list
archives, posting here only when you get
insufficient results (and telling us that you've
already checked the archives, and why the answers
there were not sufficient)...

-Peter


From claudio.grondi at freenet.de  Wed Apr  6 17:30:21 2005
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 6 Apr 2005 21:30:21 -0000
Subject: Problem with access to shared memory(W2K) / ORIGINALLY (win32)
	speedfan api control
References: <3bilaqF6in0icU1@individual.net> <hdijzrny.fsf@python.net>
Message-ID: <3birmbF6bhm54U1@individual.net>

> For the mistake you made see below, hope that helps.
It doesn't.

> >     pBuf_buf = cast(pBuf, Buffer)
> Here's the problem.  pBuf is a pointer to a Buffer structure, not the
> buffer structure itself.
> Something like
>     pBuf_buf = Buffer.from_address(pBuf)
> may work.
If I currently understand it right, cast() should
do exactly this, i.e. should write the content
pointed to by pBuf to a Python variable
pBuf_buf which is an object of the Buffer
class, where I can access the single
components like any other Python
variables - am I right or wrong?

How can I access content at any
real memory address in Python
like you suggest with the
fictive(?) .from_address(memPointer)
method?
Wouldn't it be anyway protected?
Is not cast() a kind of solution to this
problem?

Because the exepected buffer
contains zero bytes I can't use
cast(pBuf, c_char_p) to get the entire
content as it is done in the recipe
provided by Srijit Kumar Bhadra.
At least the .Data0 value is set by cast()
in my trials, but it seems, that this has
nothing to do with the shared memory
area content.

> For the general way to solve this problem you should know that you can
> access a shared memory area with a certain name also with Python's mmap
> module, although that is probably not documented very good.  There was a
> recipe posted a few days ago which showed different ways to acces shared
> memory, with or without ctypes.

> > The code I use is provided also here:
> >  http://www.codecomments.com/Python/message430495.html
> >  http://mail.python.org/pipermail/python-list/2005-March/271853.html
> > (the mmap part of it doesn't work at all)

So I am already using the recipe, right?
But it doesn't work as expected.
mmap doesn't work at all failing in
shmem = mmap.mmap(0, 0, "$M$B$M$5$S$D$", mmap.ACCESS_READ)
with WindowsError: [Errno 87] wrong parameter

I am on Windows 2000 SP 4, Pyhon version 2.3.5
using ctypes version 0.9.5 .

Any further hints?

Claudio




From cochrane at esscc.uq.edu.au  Mon Apr  4 21:05:43 2005
From: cochrane at esscc.uq.edu.au (Paul Cochrane)
Date: Tue, 5 Apr 2005 11:05:43 +1000
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
In-Reply-To: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
Message-ID: <20050405010543.GM1975@shake56.esscc.uq.edu.au>

I had similar problems with Gnuplot.py, basically, one couldn't use ascii
mode for plotting grid data, and had to set binary=1 in the GridData() 
method.  (this is off the top of my head, so I might have the binary/ascii
thing the wrong way around).  What fixed the problem was going to version
Gnuplot.py 1.7.  What version are you using?  If it's 1.6, that *might* be
the problem (although, I can't be 100% sure).

HTH

Regards,

Paul


* syd (syd.diamond at gmail.com) [050405 07:26]:
> I don't even know where to begin.  This is just bizarre.  I just picked
> up the Gnuplot.py module (a light interface to gnuplot commands) and
> was messing around with it today.
> 
> I've got a tiny script, but it only works from the command line about
> half the time!  In the python interpreter, 100%.   Ipython, 100%.  I'm
> not kidding.
> 
> #!/bin/env python
> import Gnuplot
> g = Gnuplot.Gnuplot(debug=1)
> g.title('A simple example')
> g('set data style linespoints')
> g('set terminal png small color')
> g('set output "myGraph.png"')
> g.plot([[0,1.1], [1,5.8], [2,3.3], [3,100]])
> 
> Here's just one example -- it does not work, then it works.  It seems
> totally random.  It will work a few times, then it won't for a few
> times...
> 
> bash-2.05b$ ./myGnu.py
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> set terminal png small color
> gnuplot> set output "myGraph.png"
> gnuplot> plot '/tmp/tmp5LXAow' notitle
> 
> gnuplot> plot '/tmp/tmp5LXAow' notitle
>               ^
>          can't read data file "/tmp/tmp5LXAow"
>          line 0: util.c: No such file or directory
> 
> bash-2.05b$ ./myGnu.py
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> set terminal png small color
> gnuplot> set output "myGraph.png"
> gnuplot> plot '/tmp/tmpHMTkpL' notitle
> 
> (and it makes the graph image just fine)
> 
> I mean what the hell is going on?  My permissions on /tmp are wide open
> (drwxrwxrwt).  It does the same thing when I run as root.  And it
> _always_ works when I use the interpreter or interactive python.
> 
> Any clues would be greatly appreciated.  I'm baffled.
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list

-- 
Paul Cochrane
Computational Scientist/Software Developer
Earth Systems Science Computational Centre
Rm 703, SMI Building
University of Queensland
Brisbane
Queensland 4072
Australia



From shane at hathawaymix.org  Wed Apr 27 21:42:28 2005
From: shane at hathawaymix.org (Shane Hathaway)
Date: Wed, 27 Apr 2005 19:42:28 -0600
Subject: Trigraph Idiom - Original?
In-Reply-To: <1114644362.854156.317830@l41g2000cwc.googlegroups.com>
References: <1114644362.854156.317830@l41g2000cwc.googlegroups.com>
Message-ID: <42703F84.2050904@hathawaymix.org>

Jeff Winkler wrote:
> I've come up with a trigraph idiom, am curious if it's been done before
> (probably). I like to use trigraphs occasionally.
> 
> Scenario: I'm doing an RSS->Javascript conversion for our intranet. I'd
> like to use different CSS class if a post is new. Code:
> 
> hoursOld=abs(time.time()-time.mktime(i.modified_parsed))/3600
> cssClass=['rssLink','rssLinkNew'][hoursOld<12]
> entry='<a href="%s" class="%s" target="detail">%s</a>' %
> (cssClass,i['link'],i['title'])
> 
> So, ['rssLink','rssLinkNew'] is index by boolean value- False:0, or
> True:1.
> 
> I realize many will find this hideous, but 3 lines of code to do
> something simple seems equally bad. Thoughts? Is there a better way?

The need for ternary expressions seems to center around presentation to
humans.  I find myself using such expressions frequently in presentation
templates or in code that prepares information for templates.  You're
using it the same way.

I always write it this way:

    condition and truecase or falsecase

This works as long as truecase evaluates as a true value.  (If it
doesn't, the result of the expression is falsecase.)  So I would write
the cssClass assignment like this:

    cssClass = (hoursOld < 12) and 'rssLinkNew' or 'rssLink'

The C equivalent is more readable, but this is close enough.  It's the
same trick people use in shell scripts.

Shane


From jhefferon at smcvt.edu  Thu Apr 21 13:07:56 2005
From: jhefferon at smcvt.edu (Jim)
Date: 21 Apr 2005 10:07:56 -0700
Subject: zipfile module and directories and symlinks
Message-ID: <1114103276.437994.67960@f14g2000cwb.googlegroups.com>

I'm using the zipfile module to unpack bundles.  Is there a Right way
to recognize directories, or do I just check if the name ends in '/'
(i.e., os.sep)?  That is, I have this.

  for bundleInfo in bundleObject.infolist():
     ...stuff...
     if bundleInfo.filename[-1:]==os.sep:
         make a dir
     else
         make a file

Is that right?  What about symlinks?  How do I know one of those?

Thanks for any help,
Jim



From removethis.kartic.krishnamurthy at gmail.com  Sun Apr 24 10:01:12 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Sun, 24 Apr 2005 14:01:12 GMT
Subject: Decent Win32All Documentation
In-Reply-To: <1114334447.365988.197870@o13g2000cwo.googlegroups.com>
References: <1114334447.365988.197870@o13g2000cwo.googlegroups.com>
Message-ID: <IENae.25$Ne7.6@newssvr17.news.prodigy.com>

The Great Harlin Seritt uttered these words on 4/24/2005 5:20 AM:
> Does anyone know of any decent documenation on Mark Hammond's win32all
> modules? I have tried looking at the documentation .chm file that comes
> with it, Python Programming On Win32 (OReilly book) and ActiveState's
> documentation and have found them all lacking -- yes I need it broken
> down to me.
> 
> What I am hoping to do is to work on some Python versions of PSTools. I
> think the win32 modules will be perfect for helping me do this,
> however, I am having a (more than it should be) difficult time making
> sense of the win32process module.


Harlin,

I usually first refer to MSDN for the win32 API and other functions. If 
some definitions are not clear and also to make sure that the Python 
version of the function call corresponds to the C function, I refer to 
Activestate's Win23all documentation.


Typically what I do is import win32process, dir(win32process), pick out 
a function and google it; the first couple of matches are usually the 
MSDN documentation for that function. The left bar on the MSDN page 
lists all the functions in the process API, so you can get click happy 
and read away.

HTH,
-Kartic


From tim.leeuwvander at nl.unisys.com  Mon Apr 11 07:51:50 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 11 Apr 2005 04:51:50 -0700
Subject: PyWin32 COM mailing list / web forum?
In-Reply-To: <mailman.1674.1113206082.1799.python-list@python.org>
References: <1113205508.055046.276360@f14g2000cwb.googlegroups.com>
	<mailman.1674.1113206082.1799.python-list@python.org>
Message-ID: <1113220310.046960.105360@o13g2000cwo.googlegroups.com>

Thanks for the answer... I subscribed, but meanwhile found the answer
to my problem via the MS-Word documentation already.

cheers,

--Tim



From jstroud at mbi.ucla.edu  Mon Apr  4 19:27:39 2005
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 4 Apr 2005 15:27:39 -0800
Subject: Gnuplot.py and, _by far_,
	the weirdest thing I've ever seen on my computer
In-Reply-To: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
References: <1112649790.752371.98360@g14g2000cwa.googlegroups.com>
Message-ID: <200504041627.39240.jstroud@mbi.ucla.edu>

Are you on NFS or are you using a raid? This may have to do with the time it 
takes to access your files, etc.

On Monday 04 April 2005 02:23 pm, syd wrote:
> I don't even know where to begin.  This is just bizarre.  I just picked
> up the Gnuplot.py module (a light interface to gnuplot commands) and
> was messing around with it today.
>
> I've got a tiny script, but it only works from the command line about
> half the time!  In the python interpreter, 100%.   Ipython, 100%.  I'm
> not kidding.
>
> #!/bin/env python
> import Gnuplot
> g = Gnuplot.Gnuplot(debug=1)
> g.title('A simple example')
> g('set data style linespoints')
> g('set terminal png small color')
> g('set output "myGraph.png"')
> g.plot([[0,1.1], [1,5.8], [2,3.3], [3,100]])
>
> Here's just one example -- it does not work, then it works.  It seems
> totally random.  It will work a few times, then it won't for a few
> times...
>
> bash-2.05b$ ./myGnu.py
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> set terminal png small color
> gnuplot> set output "myGraph.png"
> gnuplot> plot '/tmp/tmp5LXAow' notitle
>
> gnuplot> plot '/tmp/tmp5LXAow' notitle
>               ^
>          can't read data file "/tmp/tmp5LXAow"
>          line 0: util.c: No such file or directory
>
> bash-2.05b$ ./myGnu.py
> gnuplot> set title "A simple example"
> gnuplot> set data style linespoints
> gnuplot> set terminal png small color
> gnuplot> set output "myGraph.png"
> gnuplot> plot '/tmp/tmpHMTkpL' notitle
>
> (and it makes the graph image just fine)
>
> I mean what the hell is going on?  My permissions on /tmp are wide open
> (drwxrwxrwt).  It does the same thing when I run as root.  And it
> _always_ works when I use the interpreter or interactive python.
>
> Any clues would be greatly appreciated.  I'm baffled.

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

http://www.jamesstroud.com/


From fredrik at pythonware.com  Tue Apr 12 05:51:02 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 12 Apr 2005 11:51:02 +0200
Subject: zlib and zipfile module in Python2.4
References: <425a8caf$1_1@127.0.0.1>
	<pan.2005.04.12.09.25.44.70463@noreboots.com>
Message-ID: <d3g5gf$hgl$1@sea.gmane.org>

Bill Anderson wrote:

> I recently had this issue and discovered that if zlib headers are not
> there, python still builds gzip ... which imports zlib. Seems to me that
> since zlib apparently depends on gzip, gzip should only be built if zlib
> is.

gzip is a Python module, and isn't "built".

if zlib isn't available, importing gzip gives you an ImportError exception.  if you
remove gzip, you still get an ImportError exception.  the only difference is that
the former message tells you exactly what module you need to add.

attempting to remove Python modules that may or may not work depending
on what other modules are available or not when you run the Python installation
scripts, in order to make the error message less informative, strikes me as some-
what silly.

</F> 





From mnations at gmail.com  Thu Apr 21 17:52:57 2005
From: mnations at gmail.com (Mudcat)
Date: 21 Apr 2005 14:52:57 -0700
Subject: Confusing: Canvas image working in function but not in class
Message-ID: <1114120377.568827.294120@z14g2000cwz.googlegroups.com>

I have an image that displays on a canvas that works unless I put the
same code in a class. I can't figure that out. Here's what works:

    def uts5100(self):
        self.screen = Toplevel( self.master )
        self.screen.geometry("+100+50")
        self.screen.grab_set()
        self.screen.focus_set()

        self.screenType = "uts5100"

        self.canvas = Canvas(self.screen)

        self.canvas.create_image(20, 20, image = self.empty5100,
anchor=NW, tags = "chasis" )

        self.canvas.pack()

The image is opened in another function:

    def openImages(self):
        self.empty5100 = ImageTk.PhotoImage( Image.open("Images/" +
"5100empty.bmp") )


However if I do the same thing, but in it's own class, the image does
not appear:

    def uts5100(self):
        sys5100 = UTS5100( self.master )

class UTS5100:
    def __init__(self, master):
        self.master = master
        self.openImages()
        self.draw()

    def openImages(self):
        self.empty5100 = ImageTk.PhotoImage( Image.open("Images/" +
"5100empty.bmp") )


    def draw(self):
        self.screen = Toplevel( self.master )
        self.screen.geometry("+100+50")
        self.screen.grab_set()
        self.screen.focus_set()

        self.screenType = "uts5100"

        self.canvas = Canvas(self.screen)

        self.image = self.canvas.create_image(20, 20, image =
self.empty5100, anchor=NW, tags = "chasis" )

        self.canvas.pack()


They are called from a button that when pressed creates the window
where the image is supposed to appear. Obviously there is something
that I am missing when putting this window into it's own class, but I
can't figure it out.

Anyone got an idea why this is happening?

Thanks



From whocaresrmb at yahoo.com  Sun Apr 24 03:53:22 2005
From: whocaresrmb at yahoo.com (Johnny Gentile)
Date: 24 Apr 2005 00:53:22 -0700
Subject: Ron Grossi: God is not a man
In-Reply-To: <1114328806.147822.64660@z14g2000cwz.googlegroups.com>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
Message-ID: <1114329202.229148.82550@o13g2000cwo.googlegroups.com>

C'mon. Everyone knows God plays a Martin.



From rune.strand at gmail.com  Sun Apr 17 19:01:06 2005
From: rune.strand at gmail.com (runes)
Date: 17 Apr 2005 16:01:06 -0700
Subject: Finding name of running script
Message-ID: <1113778866.595981.186480@f14g2000cwb.googlegroups.com>

Is it a more pythonic way of finding the name of the running script
than these?

from os import sep
from sys import argv

print argv[0].split(sep)[-1]
# or
print locals()['__file__'].split(sep)[-1]
# or
print globals()['__file__'].split(sep)[-1]



From nid_oizo at yahoo.com_removethe_  Sun Apr  3 18:19:10 2005
From: nid_oizo at yahoo.com_removethe_ (Nicolas Fleury)
Date: Sun, 03 Apr 2005 18:19:10 -0400
Subject: threading.Event file descriptor
In-Reply-To: <1112562641.542176.202030@z14g2000cwz.googlegroups.com>
References: <zxM3e.55834$rl.2020212@weber.videotron.net>
	<1112562641.542176.202030@z14g2000cwz.googlegroups.com>
Message-ID: <8XZ3e.13367$g_5.314475@wagner.videotron.net>

elbertlev at gmail.com wrote:
> There is no event handle used in Event object (for NT at least). Do not
> know about Linux...

And there's no handle at all?  It's not important if it's not an event 
handle as long as it is an handle usable with WaitForMultipleObjects.

Also, I don't understand how it will be possible to implement 
threading.Event without using finally, at the lower level, a handle, 
since as far as I know this is the mechanisms the OS offers.

> Unless you want to rewrite the interpreter (namelly
> PyThread_allocate_lock.c) for platforms you are talking about, you
> would be better of, if you create your own class (derived from Event,
> and ovewritte aquire, release and wait methods).

I wouldn't want to derive from Event since my goal would be to submit a 
patch to make subprocess.Popen.wait take an optional threading.Event to 
kill the process.

Regards,
Nicolas


From erinhouston at gmail.com  Fri Apr  8 11:43:47 2005
From: erinhouston at gmail.com (erinhouston at gmail.com)
Date: 8 Apr 2005 08:43:47 -0700
Subject: Testing that a value is set.
Message-ID: <1112975027.643792.71790@g14g2000cwa.googlegroups.com>

I am using winGuiAuto to test a program.  I want to check that a
varible is set.

In the following code I am doing if(len(str(hwnd)) < 0) What is the
python way?

def clickNdSyncStopButton(hwnd=None):
....if(hwnd == None):
........hwnd = winGuiAuto.findTopWindow("NDSync")
....if(len(str(hwnd)) < 0):
........raise "Failed to find the NDSync Dialog"
....StopButton = winGuiAuto.findControl(hwnd, "Stop",
"WindowsForms10.BUTTON.app3")
....if(len(str(StopButton)) < 0):
........raise "Failed to find the StopButton"
....winGuiAuto.clickButton(StopButton)



From pyguy2 at gmail.com  Wed Apr 13 14:20:10 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 13 Apr 2005 11:20:10 -0700
Subject: HTTPSConnection script fails, but only on some servers (long)
References: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>
	<d3ftlj$r3c$1@sea.gmane.org>
	<mailman.1824.1113387514.1799.python-list@python.org>
Message-ID: <1113416410.167018.216860@g14g2000cwa.googlegroups.com>

I have a couple of recipes at the python cookbook site, that allows
python to do proxy auth and ssl. The easiest one is:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/301740

john

andreas at kostyrka.org wrote:
> Well HTTPSConnection does not support proxies. (HTTP/CONNECT + switch
to HTTPS)
>
> And it hasn't ever. Although the code seems to make sense there is
> no support for handling that switch. Probably a good thing to
complain
> about (file a new bug report).
>
> In the meantime you should take a look a cURL and pycurl, which do
support
> all kind of more extreme HTTP (FTP, etc.) handling, like using https
over
> an proxy.
>
> Andreas
>
> On Tue, Apr 12, 2005 at 03:37:33AM -0400, Steve Holden wrote:
> > Paul Winkler wrote:
> > >This is driving me up the wall... any help would be MUCH
appreciated.
> > >I have a module that I've whittled down into a 65-line script in
> > >an attempt to isolate the cause of the problem.
> > >
> > >(Real domain names have been removed in everything below.)
> > >
> > >SYNOPSIS:
> > >
> > >I have 2 target servers, at https://A.com and https://B.com.
> > >I have 2 clients, wget and my python script.
> > >Both clients are sending GET requests with exactly the
> > >same urls, parameters, and auth info.
> > >
> > >wget works fine with both servers.
> > >The python script works with server A, but NOT with server B.
> > >On Server B, it provoked a "Bad Gateway" error from Apache.
> > >In other words, the problem seems to depend on both the client
> > >and the server. Joy.
> > >
> > >Logs on server B show malformed URLs ONLY when the client
> > >is my python script, which suggests the script is broken...
> > >but logs on server A show no such problem, which suggests
> > >the problem is elsewhere.
> > >
> > >DETAILS
> > >
> > >Note, the module was originally written for the express
> > >purpose of working with B.com;  A.com was added as a point of
reference
> > >to convince myself that the script was not totally insane.
> > >Likewise, wget was tried when I wanted to see if it might be
> > >a client problem.
> > >
> > >Note the servers are running different software and return
different
> > >headers. wget -S shows this when it (successfully) hits url A:
> > >
> > > 1 HTTP/1.1 200 OK
> > > 2 Date: Tue, 12 Apr 2005 05:23:54 GMT
> > > 3 Server: Zope/(unreleased version, python 2.3.3, linux2)
ZServer/1.1
> > > 4 Content-Length: 37471
> > > 5 Etag:
> > > 6 Content-Type: text/html;charset=iso-8859-1
> > > 7 X-Cache: MISS from XXX.com
> > > 8 Keep-Alive: timeout=15, max=100
> > > 9 Connection: Keep-Alive
> > >
> > >... and this when it (successfully) hits url B:
> > >
> > > 1 HTTP/1.1 200 OK
> > > 2 Date: Tue, 12 Apr 2005 04:51:30 GMT
> > > 3 Server: Jetty/4.2.9 (Linux/2.4.26-g2-r5-cti i386 java/1.4.2_03)
> > > 4 Via: 1.0 XXX.com
> > > 5 Content-Length: 0
> > > 6 Connection: close
> > > 7 Content-Type: text/plain
> > >
> > >Only things notable to me, apart from the servers are the "Via:"
and
> > >"Connection:" headers. Also the "Content-Length: 0" from B is odd,
but
> > >that doesn't seem to be a problem when the client is wget.
> > >
> > >Sadly I don't grok HTTP well enough to spot anything really
> > >suspicious.
> > >
> > >The apache ssl request log on server B is very interesting.
> > >When my script hits it, the request logged is like:
> > >
> > >A.com - - [01/Apr/2005:17:04:46 -0500] "GET
> >
>https://A.com/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
> > >HTTP/1.1" 502 351
> > >
> > >... which apart from the 502, I thought reasonable until I
realized
> > >there's
> > >not supposed to be a protocol or domain in there at all.  So this
is
> > >clearly
> > >wrong. When the client is wget, the log shows something more
sensible
> > >like:
> > >
> > >A.com - - [01/Apr/2005:17:11:04 -0500] "GET
> >
>/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
> > >HTTP/1.0" 200 -
> > >
> > >... which looks identical except for not including the spurious
> > >protocol and domain, and the response looks as expected (200 with
size
> > >0).
> > >
> > >So, that log appears to be strong evidence that the problem is in
my
> > >client
> > >script, right?  The failing request is coming in with some bad
crap in
> > >the path, which Jboss can't handle so it barfs and Apache responds
with
> > >
> > >Bad Gateway.  Right?
> > >
> > >So why does the same exact client code work when hitting server
B??
> > >No extra gunk in the logs there. AFAICT there is nothing in the
script
> > >that could lead to such an odd request only on server A.
> > >
> > >
> > >THE SCRIPT
> > >
> > >#!/usr/bin/python2.3
> > >
> > >from httplib import HTTPSConnection
> > >from urllib import urlencode
> > >import re
> > >import base64
> > >
> > >url_re = re.compile(r'^([a-z]+)://([A-Za-z0-9._-]+)(:[0-9]+)?')
> > >
> > >target_urls = {
> > >    'B': 'https://B/SkinServlet/zopeskin',
> > >    'A': 'https://A/zope/manage_main',
> > >}
> > >
> > >auth_info= {'B':    ('userXXX', 'passXXX'),
> > >            'A':    ('userXXX', 'passXXX'),
> > >            }
> > >
> > >def doRequest(target, **kw):
> > >    """Provide a trivial interface for doing remote calls.
> > >    Keyword args are passed as query parameters.
> > >    """
> > >    url = target_urls[target]
> > >    user, passwd = auth_info[target]
> > >    proto,host,port=url_re.match(url).groups()
> > >    if port:
> > >        port = int(port[1:])   # remove the ':' ...
> > >    else:
> > >        port = 443
> > >    creds = base64.encodestring("%s:%s" % (user, passwd))
> > >    headers = {"Authorization": "Basic %s" % creds }
> > >    params = urlencode(kw).strip()
> > >    if params:
> > >        url = '%s?%s' % (url, params)
> > >    body = None # only needed for POST
> > >    args =('GET', url, body, headers)
> > >    print "ARGS: %s" % str(args)
> > >    conn = HTTPSConnection(host)
> > >    conn.request(*args)
> > >    response = conn.getresponse()
> > >    data = response.read()
> > >    if response.status >= 300:
> > >        print
> > >        msg = '%i ERROR reported by remote system %s\n' %
> > >(response.status,
> > >                                                           url)
> > >        msg += data
> > >        raise IOError, msg
> > >    print "OK!"
> > >    return data
> > >
> > >if __name__ == '__main__':
> > >    print "attempting to connect..."
> > >    result1 = doRequest('A', skey='id', rkey='id')
> > >    result2 = doRequest('B', action='updateSkinId',
> > >                        skinId='406',  facilityId='1466')
> > >    print "done!"
> > >
> > >
> > ># EOF
> > >
> > >
> > >So... what the heck is wrong here?
> > >
> > >at-wits-end-ly y'rs,
> > >
> > >Paul Winkler
> > >
> > Paul:
> >
> > I don't claim to have analyzed exactly what's going on here, but
the
> > most significant difference between the two is that you are
accessing
> > site B using HTTP 1.1 via an HTTP 1.0 proxy (as indicated byt he
"Via:"
> > header).
> >
> > Whether this is a clue or a red herring time alone will tell.
> >
> > It's possible that wget and your client code aren't using the same
proxy
> > settings, for example.
> >
> > regards
> >  Steve
> > --
> > Steve Holden        +1 703 861 4237  +1 800 494 3119
> > Holden Web LLC             http://www.holdenweb.com/
> > Python Web Programming  http://pydish.holdenweb.com/
> > 
> > -- 
> > http://mail.python.org/mailman/listinfo/python-list



From fredrik at pythonware.com  Fri Apr  8 16:10:11 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 8 Apr 2005 22:10:11 +0200
Subject: base64 interoperability
References: <d36j9a$b23$1@sea.gmane.org>
Message-ID: <d36oad$sfa$1@sea.gmane.org>

Christopher J. Bottaro wrote:
> Python's base64 module encodes and decodes differently than PHP's.

really?

> Python's docs says that it ahere's to RFC1521 (sept 1993), while PHP's adheres
> to RFC2045 (nov 1996).  Is there any Python module that uses the new standard?
> Why is Python using the old standard anyways?

have you checked this, or are you just assuming that RFC1521 and RFC2045
contains different BASE64 definitions? (if you look at the standards, you'll find
that they're about MIME, not BASE64 itself.  as far as I know, BASE64 hasn't
changed a bit since it was first defined back in RFC1113).

</F> 





From mahs at telcopartners.com  Sat Apr  9 05:31:52 2005
From: mahs at telcopartners.com (Michael Spencer)
Date: Sat, 09 Apr 2005 02:31:52 -0700
Subject: Puzzling OO design problem
In-Reply-To: <1113018015.535852.53250@z14g2000cwz.googlegroups.com>
References: <1113003772.020556.69550@l41g2000cwc.googlegroups.com>	<mailman.1593.1113005609.1799.python-list@python.org>	<1113010854.638038.173460@g14g2000cwa.googlegroups.com>	<mailman.1596.1113015264.1799.python-list@python.org>
	<1113018015.535852.53250@z14g2000cwz.googlegroups.com>
Message-ID: <d38798$3sa$1@sea.gmane.org>

George Sakkis wrote:
>><boiled down version of George's exmaple>
> 
> 
> I'm not sure if it was clear to you, but my problem is the dummy
> WorldModel_v1.MovableObject class. It doesn't do anything by itself,
> but it has to be in the inheritance chain to make its descendants work
> properly.
> 
George,

since you explicit allowed metaprogramming hacks :-), how about something like 
this (not tested beyond what you see):

class WorldVersion(type):
     """WorldVersion instances are World classes
     If a World inherits from another World: Field, Movable, Player
     automatically inherit from their corresponding superclasses"""

     def __new__(self, name, bases, clsdict):
         clslist = set(["Field", "Movable", "Player"])
         baseworld = bases[0]
         if type(baseworld) is self:
             for cls in clslist:
                 base = getattr(baseworld,cls)
                 target = clsdict.setdefault(cls, base)
                 if base is target:
                     continue
                 oldbases = list(target.__bases__)
                 if base in target.__bases__:
                     continue
                 try:
                     oldbases[oldbases.index(object)] = base
                 except ValueError:
                     oldbases.append(base)
                 target = type(target.__name__, tuple(oldbases), 
dict(target.__dict__))
                 clsdict[cls] = target



         return type.__new__(self,name, bases, clsdict)

class World1(object):
     __metaclass__ = WorldVersion
     class Field(object):
         def position(self):
             print "Positioning in World1"
     class Movable(Field):
         def move(self):
             print "Moving in World1"
     class Player(Movable):
         def passBall(self):
             print "Passing in World1"

class World2(World1):
     __metaclass__ = WorldVersion
     class Field(object):
         def position(self):
             print "Positioning in World2"
     class Movable(Field): # You still need placeholder classes
                           # but they are trivial
         pass
     class Player(Movable):
         def passBall(self):
             print "Passing in World2"

class World3(World2):
     __metaclass__ = WorldVersion
     class Player(object):
         def passBall(self):
             print "Passing in World3"


  >>> p3 = World3.Player()
  >>> p3.move()
  Moving in World1
  >>> p3.position()
  Positioning in World2
  >>> p3.passBall()
  Passing in World2
  >>>

Michael



From danb_83 at yahoo.com  Wed Apr 27 20:46:15 2005
From: danb_83 at yahoo.com (Dan Bishop)
Date: 27 Apr 2005 17:46:15 -0700
Subject: creating very small types
References: <mailman.2599.1114633031.1799.python-list@python.org>
	<pan.2005.04.27.21.46.20.199466@jerf.org>
	<427012B4.7090604@gmail.com>
	<mailman.2605.1114642557.1799.python-list@python.org>
Message-ID: <1114649175.685259.93460@f14g2000cwb.googlegroups.com>

Michael Spencer wrote:
> andrea wrote:
> >>>I was thinking to code the huffman algorithm and trying to
compress
> >>>something with it, but I've got a problem.
> >>>How can I represent for example a char with only 3 bits??
>
> >>>I had a look to the compression modules but I can't understand
them much...
> ...
> > I understand I can't do it easily in python, but maybe I could
define a
> > new type in C and use it to do those dirty works, what do you
think?
>
> Why do you need to create 'very small types'?
>
> You only need actual bit-twiddling when you do the encoding/de-coding
right?
> If you create an encoding map 'codes' as a dict of strings of '1' and
'0',
> encoding might look like (untested):
>
>      def encode(stream):
>          outchar = count = 0
>          for char in stream:
>              for bit in codes[char]:
>                  (outchar << 1) | (bit == "1")
>                  count +=1
>                  if count ==8:
>                      yield chr(outchar)
>                      outchar = count = 0
>          if count:
>              yield chr(outchar)

I wrote some Huffman compression code a few years ago, with

class BitWriter(object):
   # writes individual bits to an output stream
   def __init__(self, outputStream):
      self.__out = outputStream
      self.__bitCount = 0      # number of unwritten bits
      self.__currentByte = 0   # buffer for unwritten bits
   def write(self, bit):
      self.__currentByte = self.__currentByte << 1 | bit
      self.__bitCount += 1
      if self.__bitCount == BYTE_SIZE:
         self.__out.write(chr(self.__currentByte))
         self.__bitCount = 0
         self.__currentByte = 0
   def flush(self):
      while self.__bitCount > 0:
         self.write(0)

class BitReader(object):
   # reads individual bits from an input stream
   def __init__(self, inputStream):
      self.__in = inputStream
      self.__bits = []          # buffer to hold incoming bits
   def readBit(self):
      if len(self.__bits) == 0:
         # read the next byte
         b = ord(self.__in.read(1))
         # unpack the bits
         self.__bits = [(b & (1<<i)) != 0 for i in range(BYTE_SIZE-1,
-1, -1)]
      return self.__bits.pop(0)



From fredrik at pythonware.com  Fri Apr  8 18:50:07 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 9 Apr 2005 00:50:07 +0200
Subject: base64 interoperability
References: <d36j9a$b23$1@sea.gmane.org> <d36oad$sfa$1@sea.gmane.org>
	<d36s7q$esa$1@sea.gmane.org>
Message-ID: <d371l6$ne8$1@sea.gmane.org>

Christopher J. Bottaro wrote:

>>> Python's base64 module encodes and decodes differently than PHP's.
>>
>> really?
>
> Yeah, weird, huh?  Actually the problem is that Python puts newlines at
> every 76th char.  How do I stop Python from doing that?  I just want
> everyone on one line.

did you read the spec you were referring to?

    "The encoded output stream must be represented in lines of no more
    than 76 characters each.  All line breaks or other characters not found
    in Table 1 must be ignored by decoding software."

if you want to use a non-standard "base64 minus newlines" format, use the
replace method to get rid of the newlines.

</F> 





From kent37 at tds.net  Wed Apr 20 08:03:00 2005
From: kent37 at tds.net (Kent Johnson)
Date: Wed, 20 Apr 2005 08:03:00 -0400
Subject: XML parsing per record
In-Reply-To: <pan.2005.04.20.10.08.25.97524@gmail.com>
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
	<EFj8e.809$E57.495@fe51.usenetserver.com>
	<pan.2005.04.20.10.08.25.97524@gmail.com>
Message-ID: <426640b6$1_1@newspeer2.tds.net>

Willem Ligtenberg wrote:
>>Willem Ligtenberg <WLigtenberg at gmail.com> wrote:
>>
>>>I want to parse a very large (2.4 gig) XML file (bioinformatics
>>>ofcourse :)) But I have no clue how to do that. Most things I see read
>>>the entire xml file at once. That isn't going to work here ofcourse.
>>>
>>>So I would like to parse a XML file one record at a time and then be
>>>able to store the information in another object.  How should I do
>>>that?
> 
> The XML file I need to parse contains information about genes.
> So the first element is a gene and then there are a lot sub-elements with
> sub-elements. I only need some of the informtion and want to store it in
> my an object called gene. Lateron this information will be printed into a
> file, which in it's turn will be fed into some other program.
> This is an example of the XML
> <?xml version="1.0"?>
> <!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN" "NCBI_Entrezgene.dtd">
> <Entrezgene-Set>
>   <Entrezgene>
>     <snip>
>   </Entrezgene>
> </Entrezgene-Set>

This should get you started with cElementTree:

import cElementTree as ElementTree

source = 'Entrezgene.xml'

for event, elem in ElementTree.iterparse(source):
     if elem.tag == 'Entrezgene':
         # Process the Entrezgene element
         geneid = elem.findtext('Entrezgene_track-info/Gene-track/Gene-track_geneid')
         print 'Gene id', geneid

         # Throw away the element, we're done with it
         elem.clear()

Kent


From simon.brunning at gmail.com  Mon Apr 11 03:54:37 2005
From: simon.brunning at gmail.com (Simon Brunning)
Date: Mon, 11 Apr 2005 08:54:37 +0100
Subject: PyWin32 COM mailing list / web forum?
In-Reply-To: <1113205508.055046.276360@f14g2000cwb.googlegroups.com>
References: <1113205508.055046.276360@f14g2000cwb.googlegroups.com>
Message-ID: <8c7f10c605041100546fec7f1e@mail.gmail.com>

On 11 Apr 2005 00:45:08 -0700, Tim N. van der Leeuw
<tim.leeuwvander at nl.unisys.com> wrote:
> I have some questions specifically about python win32com extensions,
> and I thought it might be more appropriate to ask them on a mailing
> list / newsgroup / webforum etc. dedicated to that. But is there such a
> thing anywhere? I couldn't find links to it from the pywin32 homepage
> or sourceforge-page.

Try http://mail.python.org/mailman/listinfo/python-win32

-- 
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From peter at engcorp.com  Wed Apr  6 10:24:15 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 06 Apr 2005 10:24:15 -0400
Subject: formatting file
In-Reply-To: <mailman.1428.1112793749.1799.python-list@python.org>
References: <mailman.1428.1112793749.1799.python-list@python.org>
Message-ID: <LOmdnUYeZY-SbM7fRVn-uw@powergate.ca>

SPJ wrote:
> I have a file with the following format:
> 
> test1    1.1-1   installed
> test1    1.1-1   update
> test2    2.1-1   installed
> test2    2.1-2   update
> 
> I want the file to be formatted in the following way:
> 
> test1    1.1-1   1.1-2
> test2    2.1-1   2.1-2

Please verify that you made an error about the second
version value for "test1": the before (1.1-1) and
the after (1.1-2) values do not match.

Also, is it fair to assume the file is guaranteed
to contain even numbers of lines, always with both
an "installed" line and an "update" line, and that
the order is as shown above, etc...  in other words,
how robust does the solution need to be?

(You might also show a little bit of your own attempt,
if nothing else so we don't get the idea this is
homework that we're doing for you. :-) )

-Peter


From jerf at jerf.org  Tue Apr 26 00:25:01 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 00:25:01 -0400
Subject: What's do list comprehensions do that generator
	expressions	don't?
References: <86ll77pgqz.fsf@guru.mired.org>
	<mailman.2430.1114408769.1799.python-list@python.org>
	<pan.2005.04.25.19.29.02.291034@jerf.org>
	<du7wtqq8ukz.fsf@mozart.cc.tut.fi>
	<mailman.2489.1114462128.1799.python-list@python.org>
	<pan.2005.04.25.23.56.25.840188@jerf.org>
	<86acnmnq4m.fsf@guru.mired.org>
Message-ID: <pan.2005.04.26.04.25.01.553683@jerf.org>

On Mon, 25 Apr 2005 23:00:57 -0500, Mike Meyer wrote:
> Why do we have to wait for Python 3.0 for this? Couldn't list
> comprehensions and generator expression be unified without breaking
> existing code that didn't deserve to be broken?

We don't; my mentioning 3.0 was just in reference to a previous comment.
In fact it'll probably happen sooner than then, I just have no direct
knowledge. (I know some people were talking about creating iterators that
know how many things they contain, which is the critical optimization, but
I don't know if that's gotten anywhere; I don't track the dev list as it
is too much traffic for my already strained email client :-) )


From rbt at athop1.ath.vt.edu  Wed Apr  6 09:21:58 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Wed, 06 Apr 2005 09:21:58 -0400
Subject: check interpreter version before running script
In-Reply-To: <d2u2bp$og4$01$2@news.t-online.com>
References: <d2u1v8$n8t$1@solaris.cc.vt.edu>
	<d2u2bp$og4$01$2@news.t-online.com>
Message-ID: <d30npm$jfv$1@solaris.cc.vt.edu>

Peter Otten wrote:
> rbt wrote:
> 
> 
>>Is there a recommended or 'Best Practices' way of checking the version
>>of python before running scripts? I have scripts that use the os.walk()
>>feature (introduced in 2.3) and users running 2.2 who get errors.
>>Instead of telling them, 'Upgrade you Python Install, I'd like to use
>>sys.version or some other way of checking before running.
> 
> 
> I like
> 
> import os
> 
> try:
>     os.walk
> except AttributeError:
>     # implement fallback
> 
> No need to remember in which version the desired feature came to be.
> 
> Peter

Thanks for all the tips. I found this tip from Peter the best for my 
situation.


From ben.champion at gmail.com  Wed Apr 27 15:30:03 2005
From: ben.champion at gmail.com (FLChamp)
Date: 27 Apr 2005 12:30:03 -0700
Subject: odeint function in SciPy
Message-ID: <1114630203.755082.285020@l41g2000cwc.googlegroups.com>

I was wondering what numerical method the odeint function is based on.
I have checked the documentation but couldnt find anything. I would be
very grateful if someone could answer this question for me, I'm not
looking for a heavy mathematical answer!

Cheers!

Ben



From rkern at ucsd.edu  Fri Apr 22 20:26:19 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Fri, 22 Apr 2005 17:26:19 -0700
Subject: Python licence again
In-Reply-To: <42694858.1060702@geochemsource.com>
References: <42694858.1060702@geochemsource.com>
Message-ID: <d4c4ei$lmd$1@sea.gmane.org>

Laszlo Zsolt Nagy wrote:
> 
>  Hi All!
> 
> I know there has been a post about Python licencing but I have different 
> questions. I tried to Google for "Python Licence" and "Python Licencing" 
> but I could not find the answer.
> Is there a place where I can ready about Python licencing? (A FAQ 
> maybe?) I really need to know the details of the licence, but not in the 
> lawyer's language. Just simple questions:
> 
> - How put a software under the Python licence?

While you can, sort of, and people have already pointed out the 
appropriate web page to you, I ask that you *don't* use the PSF License. 
The PSF License uses proper nouns that you will have to change[1]. When 
you are done, it will no longer be the PSF License. It is my opinion 
that this kind of variant proliferation is a nuisance.

Instead, you could use other well-accepted licenses that are broadly 
similar to the PSF License.

http://www.opensource.org/licenses/bsd-license.php
http://www.opensource.org/licenses/mit-license.php
http://www.opensource.org/licenses/afl-2.1.php

[1] For example: "1. This LICENSE AGREEMENT is between the Python 
Software Foundation ("PSF"), and the Individual or Organization 
("Licensee") accessing and otherwise using this software ("Python") in 
source or binary form and its associated documentation."

You are neither the PSF nor is your software "Python".

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From siona at chiark.greenend.org.uk  Fri Apr 22 13:00:57 2005
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 22 Apr 2005 18:00:57 +0100 (BST)
Subject: Overiding error message when using a python program
References: <1114181140.609745.192580@g14g2000cwa.googlegroups.com>
	<mailman.2288.1114184386.1799.python-list@python.org>
Message-ID: <nsp*YTKMq@news.chiark.greenend.org.uk>

Brian van den Broek  <bvande at po-box.mcgill.ca> wrote:
> you've not included the part of your code which acts on the 
>user's input.

I think you'll find the answer to the question of where the code
that acts on the user's input lies here:

> (And your prompt_user function should use raw_input and 
>return the user input for processing by other functions. raw_input is 
>safer; input executes arbitrary code.)


-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From peter at engcorp.com  Wed Apr 13 08:59:46 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 13 Apr 2005 08:59:46 -0400
Subject: os.path.walk
In-Reply-To: <425c9902$1@dnews.tpgi.com.au>
References: <425c9902$1@dnews.tpgi.com.au>
Message-ID: <hu6dnY4pjIlbisDfRVn-1g@powergate.ca>

Micheal wrote:
> If I have os.path.walk(name, processDirectory, None) and processDirectory
> needs three arguments how can I ass them because walk only takes 3?

The best answer to this is: if you aren't stuck
using a version of Python prior to 2.4, don't
use os.path.walk but use os.walk() instead...

-Peter


From wnebfynj at mnovryyb.pbz  Tue Apr  5 09:37:03 2005
From: wnebfynj at mnovryyb.pbz (JZ)
Date: Tue, 5 Apr 2005 15:37:03 +0200
Subject: Python IDE like NetBeans/Delphi IDE
References: <mailman.1376.1112702768.1799.python-list@python.org>
Message-ID: <q8pueyi8zn9d.sh0wtybdkgxg.dlg@40tude.net>

Dnia Tue, 05 Apr 2005 14:07:14 +0200, fowlertrainer at anonym.hu napisa?(a):

> Hi !
> 
> I search for an IDE that working in Windows, and knows these functions:
> 
> A.) Automatic name searching/showing/extending on classes with 
> keypressing (like Netbeans, or Delphi Ctrl+Space).
> B.) Debugging: breakpoints, step on lines (code), watch variables.
> 
> Or A and B both.
> 
> Please help me.

Check those:
Eclipse + pydev plugin (free, stable, good integration with SVN plugin,
pylint, debugger, refactoring)
PythonWin (free, stable, fast, good debugger)
WingIDE (commercial, slower than PythonWin but has many features)

--
JZ


From steven.bethard at gmail.com  Tue Apr 12 10:33:14 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 12 Apr 2005 08:33:14 -0600
Subject: singleton objects with decorators
In-Reply-To: <mailman.1738.1113296902.1799.python-list@python.org>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de><ec6dnbne_Lf_zcbfRVn-tA@comcast.com>	<d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
	<mailman.1738.1113296902.1799.python-list@python.org>
Message-ID: <b7mdnTGtQI60QcbfRVn-sQ@comcast.com>

Fredrik Lundh wrote:
> Or if you're using an application object (you should), just add a config object
> to the application object (app.config.param = ...).

Do you have a link or two that describe what you mean by an "application 
object"?  The "you should" comment makes me think this is something of a 
design pattern, but googling around wasn't able to satisfy my curiosity.

STeVe


From chrisNOSPAM at spam.com  Fri Apr 29 06:18:14 2005
From: chrisNOSPAM at spam.com (Chris)
Date: Fri, 29 Apr 2005 12:18:14 +0200
Subject: SWIG char** to Python list
Message-ID: <1114769895.211096@ftpgate>

Hi

I have a C function that builds a list of null terminated strings:
void buildStringList(char **asStrings, int n);
The number of elements in the list is given in input.

I'd like to have this function available in Python.
I use SWIG but I'm a complete newbie with it.
I've only found an example to convert a Python list to C char**
http://www.swig.org/Doc1.3/Python.html#Python_nn59

I naively replaced typemap(in) by typemap(out) but it doesn't work :
TypeError: argument number 1: a 'char **' is expected, 'list([])' is
received

Do I have to learn more of SWIG or is there a simple way to make my C
function fill a list of Python objects?

Regards
Chris




From jbo at cannedham.ee.ed.ac.uk  Wed Apr 13 13:26:48 2005
From: jbo at cannedham.ee.ed.ac.uk (Jim)
Date: Wed, 13 Apr 2005 18:26:48 +0100
Subject: preallocate list
In-Reply-To: <86ednUIA9pjR3sDfRVn-tA@comcast.com>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j5t4$nqg$1@scotsman.ed.ac.uk>
	<d3j569$5tr$1@solaris.cc.vt.edu> <op.so6ehvehpda12i@localhost>
	<d3jes1$onj$1@scotsman.ed.ac.uk>
	<86ednUIA9pjR3sDfRVn-tA@comcast.com>
Message-ID: <d3jknb$p7h$1@scotsman.ed.ac.uk>

Steven Bethard wrote:
> Jim wrote:
> 
>> What I really want is a Numeric array but I don't think Numeric 
>> supports importing files.
> 
> 
> Hmmm...  Maybe the scipy package?
> 
> I think scipy.io.read_array might help, but I've never used it.
> 
> STeVe
Sounds promising.

I only got Numeric because I wanted scipy but I've hardly explored it as 
I kept running into problems even with the complicated examples cut and 
paste into a file ;)

Oh yeah, I wanted to explore the GA module but no docs :( and I got busy 
doing other stuff.

Thanks

Jim


From devnull at joreybump.com  Mon Apr 25 20:35:59 2005
From: devnull at joreybump.com (Jorey Bump)
Date: Tue, 26 Apr 2005 00:35:59 GMT
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
Message-ID: <Xns9643D18CC9239devnulljoreybumpcom@199.45.49.11>

"Lad" <python at hope.cz> wrote in news:1114254894.512656.297040
@l41g2000cwc.googlegroups.com:

> Is anyone capable of providing Python advantages over PHP if there are
> any?

As you learn Python, you will find that your PHP code will improve, 
possibly becoming more and more concise until it disappears completely.



From peter at engcorp.com  Mon Apr 25 13:00:51 2005
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 25 Apr 2005 13:00:51 -0400
Subject: Python, Perl & PDF files
In-Reply-To: <uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
References: <d4ir0v$fed$1@solaris.cc.vt.edu>
	<ggup61l2ssh58bdonmces93hcmmt18edv0@4ax.com>
	<a43q61ttckeo37l1u47siv1k91jjfqflf9@4ax.com>
	<uNKdnSDQLpKUvfDfRVn-pQ@powergate.ca>
Message-ID: <xImdnW33JJiov_DfRVn-iw@powergate.ca>

Peter Hansen wrote:
> Dennis Lee Bieber wrote:
>> On Mon, 25 Apr 2005 17:24:36 +0300, Christos "TZOTZIOY" Georgiou:
>>> I don't know any related myth of anglo-saxon origin to quote.

>>     The most commonly known phrasing would likely be "God only helps
>> those who help themselves".
> 
> Google suggests that removing the word "only" produces a
> phrase many times more commonly known...

And very interesting reading (to spawn another diversion
typical to c.l.p), such as the third link in Google
titled "Vessel of Honour: ..." (content available only
via the "Cached" link), which points out that this
biblical-sounding phrase was never in the bible,
but actually comes *from Greek mythology*, and specifically
(it claims) from the same story as Christos has
quoted, except that the "god" in question was Hercules
and other details differ somewhat...

Of course, the very next link then claims that it was
in fact the great god himself, Benjamin Franklin, who
gave us this phrase...

No doubt this is right up there with the origins of
"may you leave in interesting times". :-)

-Peter


From peter at engcorp.com  Wed Apr 20 11:45:24 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 20 Apr 2005 11:45:24 -0400
Subject: goto statement
In-Reply-To: <42666097.3040405@i.com.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
Message-ID: <dqCdneECDr445vvfRVn-tA@powergate.ca>

Maxim Kasimov wrote:
>  uuuuf..., i don't requesting that "goto" was available in next versions 
> of python, but i'm saying if it will be so, it will be easy and quickly 
 > _debug_ some skripts, _not only_ for commenting

Then we go right back to Simon Brunning's question for
you: "How does goto help you to remove bugs?"

Maxim, nobody is really saying that *you* cannot have
found goto useful in debugging (though we're curious
for a real example, rather than just rhetoric).  What
most people are saying (roughly) is that after writing
tens (or hundreds) of thousands of lines of code, we
cannot think of examples where the value of "goto",
for debugging or otherwise, outweighs the incredible
damage it does to the structure and (thus) readability
of code.  And keep in mind that many of us were raised
on languages like BASIC and yet we've learned, improved,
and moved on to the point where we fully understand the
perceived value of GOTO in the mind of a newbie, but
remain unconvinced that even (or especially!) for a newbie
it is a good idea to have it available.

So far, nobody on the "use goto!" side of the fence has
presented arguments that haven't already been shot down
dozens of times in this newsgroup and elsewhere.  Of
course, we should all take this hint as a reminder that
this is a "religious" issue and that this particular
thread is not going to settle it once and for all.

-Peter


From codecraig at gmail.com  Fri Apr 15 10:17:55 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 07:17:55 -0700
Subject: Get OS name
In-Reply-To: <mailman.1967.1113574056.1799.python-list@python.org>
References: <mailman.1967.1113574056.1799.python-list@python.org>
Message-ID: <1113574675.170849.111260@f14g2000cwb.googlegroups.com>

where can I get wmi module, it doesnt come with Python right?

thanks.



From gh at ghaering.de  Thu Apr 21 19:34:32 2005
From: gh at ghaering.de (Gerhard Haering)
Date: Fri, 22 Apr 2005 01:34:32 +0200
Subject: [ANN] pysqlite 2.0.alpha3
Message-ID: <20050421233432.GA15825@mylene.ghaering.de>

===================
pysqlite 2.0.alpha3
===================

I'm glad to announce pysqlite 2.0.alpha3, which will be the last alpha
release.  Documentation and more testing will be what I'm concentrating
on in the beta test phase, so here's the explanation of the new features
within the change log.

Download it from Sourceforge:
    http://sourceforge.net/project/showfiles.php?group_id=54058

Changes since 2.0.alpha2
========================

- Fixed various memory leaks and refcount problems.

- Connection, Cursor and row factories.

    o Connection factory: Subclass pysqlite2.dbapi2.Connection and
    provide the parameter to pysqlite2.dbapi2.connect to use that class
    instead.

    o Cursor factory: Subclass pysqlite2.dbapi2.Cursor and provide the
    parameter to the cursor() method of the Connection class so that
    cursors of your class are created.

    o Row factory: set the row_factory attribute in your cursor to a
    callable that accepts a tuple and returns the "real" row object.

    Combine the three for maximimal power and convenience like in the
    following example, where we transparently use the db_row module from
    http://opensource.theopalgroup.com/ to be able to access columns by
    name instead of by index. A fast alternative to PgResultSet in
    pysqlite 1.x.

    from pysqlite2 import dbapi2 as sqlite
    import db_row

    class DbRowConnection(sqlite.Connection):
        def __init__(self, *args, **kwargs):
            sqlite.Connection.__init__(self, *args, **kwargs)

        def cursor(self):
            return DbRowCursor(self)

    class DbRowCursor(sqlite.Cursor):
        def execute(self, *args, **kwargs):
            sqlite.Cursor.execute(self, *args, **kwargs)
            if self.description:
                self.row_factory = db_row.IMetaRow(self.description) 

    con = sqlite.connect(":memory:") #, factory=DbRowConnection)
    cur = con.cursor(factory=DbRowCursor)
    cur.execute("create table test(i integer)")
    cur.execute("select 4+5 as foo")
    for row in cur:
        print ">", row
        print row["foo"]
    print cur.fetchone()["foo"]

- The first parameter to .execute() and .executemany() can now also be a
  Unicode string:

  cur.execute(u"insert into person(name) values ('H?ring')")

- The conversion in SQLite types mode for TEXT is now unicode, not UTF-8
  encoded bytestrings.

  i. e. if the column type is TEXT, then you get back unicode objects now.

- Implemented user functions and aggregates.

    Where a number of parameters is expected, -1 means variable number
    of arguments.

    The functions and aggregates must return values of the type NoneType, int,
    float, str, unicode or buffer (BLOB).

    Example code:

    def f(*args):
        return sum(args)

    class Sum:
        def __init__(self):
            self.sum = 0

        def step(self, x):
            self.sum += int(x)

        def finalize(self):
            return self.sum


    con = sqlite.connect(":memory:")

    # Syntax: function name, number of parameters, callable
    con.create_function("myfunc", -1, f)

    # Syntax: aggregate name, number of parameters, aggregate class
    con.create_aggregate("myaggr", 1, Sum)

- Added MANIFEST.in file, so that bdist_rpm and sdist will work.

- Release GIL during SQLite calls.

- After a cursor.executemany, cursor.rowcount now delivers the sum of all
  changes, not only the changes in the last call to the prepared statement.


- Implemented checks that the SQLite objects are used from the same
  thread they were created in. Otherwise raise a ProgrammingError.

  If you're 100% sure that you want to use the same connection object in
  multiple threads, because you use proper locking, you can turn the
  check of by using the parameter ''check_same_thread=0''.

- Allow for parameters to be dictionaries, too. Then, the name-based
  binding in SQLite 3 is used:

    cur.execute("select name from test where name=:name", {"name": "foo"})


- Improved error handling.

- Allow for explicit transaction start:

    >>> con = sqlite.connect(":memory:", no_implicit_begin=True)
    ...
    >>> con.begin()
    ...
    >>> con.rollback()
    ...
    >>> con.commit()

- Implemented cursor.lastrowid

- Avoid code duplication: handle execute() and executemany() internally
  in the same function.

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From grante at visi.com  Mon Apr 25 00:03:24 2005
From: grante at visi.com (Grant Edwards)
Date: Mon, 25 Apr 2005 04:03:24 -0000
Subject: Is this a bug?
References: <426bb3e9$0$83084$ed2619ec@ptn-nntp-reader01.plus.net>
	<116nfblc10i9340@corp.supernews.com>
	<mailman.2422.1114392805.1799.python-list@python.org>
	<116ojvf473dc16b@corp.supernews.com>
	<mailman.2427.1114400979.1799.python-list@python.org>
Message-ID: <116or0c7pvcom4f@corp.supernews.com>

On 2005-04-25, Robert Kern <rkern at ucsd.edu> wrote:

>> I certainly don't see how.  Strings are immutable.  The old
>> object can't be modified in-place, so the "in-place" behavior
>> is moot.
>
> It's the left-hand-side, in this case a list, that gets modified 
> in-place. Whether the right-hand-side is mutable or not is irrelevant.

You're right.  I had things backwards in my head.

>> Your quote states quite clearly that the binary operation *is
>> the same* whether it's spelt a = a + b or a += b.  That is
>> simply not true for the example we're discussing.
>
> No, the quote says "with the exception of the possible
> in-place behavior, the binary operation performed by augmented
> assignment is the same as the normal binary operations." This
> is "in-place" behavior.  Badly designed "in-place" behavior,
> yes.

Right. The binary operation performed should be the same
regardless of whether it is done in place or not.  In this
case, the "in-place" behavior is completely different than the
other spelling.

> It's a mistake, but it's been in the wild too long to be changed. Thus, 
> it should be documented.

Life's like that, unfortunately.

-- 
Grant Edwards                   grante             Yow!  I'm RELIGIOUS!! I
                                  at               love a man with a
                               visi.com            HAIRPIECE!! Equip me with
                                                   MISSILES!!


From artiegold at austin.rr.com  Sat Apr  2 10:39:48 2005
From: artiegold at austin.rr.com (Artie Gold)
Date: Sat, 02 Apr 2005 09:39:48 -0600
Subject: Simple thread-safe counter?
In-Reply-To: <Rju3e.719$bI3.67477@monger.newsread.com>
References: <7x3bu9ss22.fsf_-_@ruckus.brouhaha.com>
	<mailman.1224.1112418208.1799.python-list@python.org>
	<3b70ntF6fd45tU1@individual.net>
	<Rju3e.719$bI3.67477@monger.newsread.com>
Message-ID: <3b7sm4F6fs37mU1@individual.net>

Leif K-Brooks wrote:
> Artie Gold wrote:
> 
>> Skip Montanaro wrote:
>>
>>>     counter = Queue.Queue()
>>>     def f():
>>>         i = counter.get()
>>
>>
>> I think you need:
>>           i = counter.get(True)
> 
> 
> The default value for the "block" argument to Queue.get is True.

Right. I misparsed the entry in the documentation:

"If optional args block is true and timeout is None (the default), block 
if necessary..."

Thanks,
--ag

-- 
Artie Gold -- Austin, Texas
http://it-matters.blogspot.com (new post 12/5)
http://www.cafepress.com/goldsays


From ncaudill at email.unc.edu  Sat Apr 30 21:31:25 2005
From: ncaudill at email.unc.edu (Nolan Caudill)
Date: Sat, 30 Apr 2005 21:31:25 -0400
Subject: Ron Grossi: God is not a man
In-Reply-To: <OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<FEpce.1407$7F4.136@newsread2.news.atl.earthlink.net>
	<3desu2F6qoj7aU1@individual.net>
	<#ATbpqMTFHA.3980@TK2MSFTNGP12.phx.gbl>
	<LXsce.2698$zu.1067@newssvr13.news.prodigy.com>
	<OOYrXNTTFHA.3544@TK2MSFTNGP10.phx.gbl>
Message-ID: <427432e5@news.unc.edu>

Donald L McDaniel wrote:
> AKA wrote:
> 
>>"Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>news:%23ATbpqMTFHA.3980 at TK2MSFTNGP12.phx.gbl...
>>
>>>MC05 wrote:
>>>
>>>>"sheltech" <quasara at earthlink.net> wrote in message
>>>>news:FEpce.1407$7F4.136 at newsread2.news.atl.earthlink.net...
>>>>
>>>>>"MC05" <smokerdude66 at myway.com> wrote in message
>>>>>news:3dc8hjF6s5i2uU1 at individual.net...
>>>>>
>>>>>>"Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
>>>>>>news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
>>>>>>
>>>>>>>4) I doubt seriously whether God plays a guitar, since guitars
>>>>>>>are made by men, for men.  His Son could theoretically play a
>>>>>>>guitar. Perhaps He does. Perhaps He doesn't.  Only the Father
>>>>>>>and His Holy Angels know.
>>>>>>
>>>>>>So then Lucifer was a wicked bass player whose sex and drugs and
>>>>>>rock n roll alientated the rest of the band and was fired?
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>"Fired" ....  good one
>>>>
>>>>Heh.  Can't take credit for an accident.  Your eye is better than
>>>>mine. :)
>>>
>>>The Devil has been fired...by God Himself.  Read the Book of
>>>Revelation in the New Testament:  Satan's end is clearly outlined by
>>>the Angel Jesus sent to St. John.  This end is very clear:  he will
>>>be cast alive into the Lake which burns with fire and brimstone,
>>>where he will be tormented day and night forever.
>>>
>>>Not only Satan and his angels will be cast into the Lake, but all
>>>those who follow him and his servants.  I assure you, Satan won't be
>>>ruling anyone in the Fire.  He will be in just as much torment as
>>>his followers. Neither will he have any sort of job.
>>>
>>>I strongly advise you to stop making fun of things you have no
>>>understanding of.  Your eternal destiny depends on the way you treat
>>>others.
>>>
>>>--
>>>Donald L McDaniel
>>>Please reply to the original thread,
>>>so that the thread may be kept intact.
>>>==============================
>>>
>>
>>Just imagine if you actually had a coherent thought.
> 
> 
> My Bible tells me that the Truth sounds like foolishness to a perishing man.
> Are you perishing?  God threw out a life-raft for you.  Jesus is more than 
> willing to rescue a drowning man.  Go to the nearest church(Roman Catholic, 
> Eastern Orthodox), and ask how you can be saved from your sin.
> 
So God only likes the Roman Catholic, Eastern Orthodox churches?


From dave.benjamin at gmail.com  Thu Apr 28 12:40:05 2005
From: dave.benjamin at gmail.com (Dave Benjamin)
Date: Thu, 28 Apr 2005 09:40:05 -0700
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <d4qveg$5k6$1@gemini.csx.cam.ac.uk>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk>
Message-ID: <wh8ce.142$%o.107@fed1read05>

Michael Hoffman wrote:
> Paul Miller wrote:
> 
>  > I see lambda is "going away", so I want to use something that will be 
>  > around for awhile.
>  >
>  > All I want to do is provide an "inline function" as an argument to
>  > another function.
> 
> That's what lambda does. But it's going away, you'll have to use def 
> when it does, unless the language designers come up with something better.
> 
>> For example, let's say I have a function which binds a key to a 
>> function call. I want to do something "simple" in this function call, 
>> and I have a lot of bindings, so I don't want to have a ton of tiny 
>> little functions scattered around:
>>
>>     def setVarTo1():
>>         foo.var = 1
>>     def setVarTo2():
>>         foo.var = 2
>>
>>     bind('a', setVarTo1)
>>     bind('b', setVarTo2)
> 
> 
> If a lot of the bindings are actually setting variables, you could do 
> something like this:
> 
> def attrsetter(obj, name, 1):
>     def _return_func(value):
>         return setattr(obj, name, value)
> 
>     return _return_func

I think you meant to write something like this:

def attrsetter(obj, name, value):
     def _return_func():
         return setattr(obj, name, value)
     return _return_func

Or, if you want to delay binding of the "value" parameter:

def attrsetter(obj, name):
     def _return_func(value):
         return setattr(obj, name, value)
     return _return_func

Cheers,
Dave


From jane at ucla.edu  Mon Apr  4 16:33:30 2005
From: jane at ucla.edu (jane at ucla.edu)
Date: Mon, 4 Apr 2005 13:33:30 -0700
Subject: hello
Message-ID: <20050405023948.CDC7E1E4006@bag.python.org>

The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.


From kay.schluehr at gmx.net  Wed Apr 27 15:53:33 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 27 Apr 2005 12:53:33 -0700
Subject: suggestions on how to do this
In-Reply-To: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
References: <xNKbe.30981$5F3.1340@news-server.bigpond.net.au>
Message-ID: <1114631613.797877.269580@g14g2000cwa.googlegroups.com>

Seems You are looking for a generating function of a recurrence
relation. There is a standard text about this topic written by Herbert
S. Wilf downloadable from his homapage:

http://www.cis.upenn.edu/~wilf/

Regards,
Kay



From kay.schluehr at gmx.net  Tue Apr 26 02:58:13 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 25 Apr 2005 23:58:13 -0700
Subject: Injecting code into a function
In-Reply-To: <1114497089.020512.309660@o13g2000cwo.googlegroups.com>
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
	<426dab5c.540679656@news.oz.net>
	<1114497089.020512.309660@o13g2000cwo.googlegroups.com>
Message-ID: <1114498693.321717.218400@f14g2000cwb.googlegroups.com>


George Sakkis wrote:

> That's all good, at least if I knew how to poke with bytecodes ;-)
> What's a good starting point to look at ?

http://sourceforge.net/projects/bytecodehacks/
http://bytecodehacks.sourceforge.net/bch-docs/bch/

For more recent development this ANN of Christian Tismer is important:

http://mail.python.org/pipermail/python-announce-list/2004-July/003280.html

Ciao,
Kay



From peter at engcorp.com  Wed Apr  6 10:12:06 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 06 Apr 2005 10:12:06 -0400
Subject: How to detect windows shutdown
In-Reply-To: <d303gk$btk$1@netnews.hinet.net>
References: <d303gk$btk$1@netnews.hinet.net>
Message-ID: <F8WdnZpmZN6pc87fRVn-hQ@powergate.ca>

Austin wrote:
> I wrote a program running on windows.
> I put the link of the program in "Start up" folder and let it executed 
> minimized.
> Every time when I open the computer, my program will be running in system 
> tray.
> 
> But if the user would like to shutdown the computer, the OS will show an 
> error about exception.

Important missing information:  is this a GUI program or
a console program, and if it's a GUI program, what framework
did you use to write it (wxPython, PyQt, other...)?  Also,
what is the exception that you got?  (Always report the
specific error: we can't guess what exception you got,
and the answer could well point directly to a cause that
is different than you think it is.)

-Peter


From rkern at ucsd.edu  Sun Apr 24 07:06:35 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 24 Apr 2005 04:06:35 -0700
Subject: bytecode non-backcompatibility
In-Reply-To: <d4frsf$ku$1@domitilla.aioe.org>
References: <d4frsf$ku$1@domitilla.aioe.org>
Message-ID: <d4fual$lco$1@sea.gmane.org>

Maurice LING wrote:
> Hi,
> 
> I've been using Python for about 2 years now, for my honours project and 
> now my postgrad project. I must say that I am loving it more and more 
> now. From my knowledge, Python bytecodes are not back-compatible. I must 
> say that my technical background isn't strong enough but is there any 
> good reason for not being back-compatible in bytecodes?
 >
> My problem is not about pure python modules or libraries but the problem 
> is with 3rd party libraries with C bindings (not python pure).

Then this has nothing to do with bytecode incompatibility. Only 
pure-Python modules get compiled to bytecode. You mean binary 
compatibility of the C API.

If you're going to have significant improvements in the core 
interpreter, you have to break binary compatibility from time to time.

> It means 
> that with every upgrade of python, I have to reinstall all my 3rd party 
> libraries which can be quite a bit of work...
> 
> I do hope this problem will be sorted out some day.

This problem is mitigated somewhat by the fact that the devs keep binary 
compatibility within a major revision series (e.g. 2.3.0, 2.3.1, 2.3.2, 
...).

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From cookedm+news at physics.mcmaster.ca  Fri Apr  1 16:11:20 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Fri, 01 Apr 2005 16:11:20 -0500
Subject: numeric module
References: <1112377090.192124.303640@o13g2000cwo.googlegroups.com>
	<l9udnTOH3bYvEtDfRVn-vA@comcast.com>
	<1112380860.693533.158060@l41g2000cwc.googlegroups.com>
Message-ID: <qnkmzsicidj.fsf@arbutus.physics.mcmaster.ca>

"coffeebug" <fritoj at netscape.net> writes:

> I cannot import "numarray" and I cannot import "numeric" using python
> 2.3.3

numarray and Numeric are separate modules available at 
http://numpy.sourceforge.net/

If you're doing anything numerical in Python, you'll want them :-)

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From ckb2102 at yahoo.com  Thu Apr 28 16:59:25 2005
From: ckb2102 at yahoo.com (ckb2102)
Date: Thu, 28 Apr 2005 20:59:25 -0000
Subject: Trying to write CGI script with python...
Message-ID: <d4rird+6rtf@eGroups.com>


Hi there,

I am new to this so I apologize in advance if I am not following the 
right etiquette or something...

I am working on a project for school.  My partner has written a 
short program in Python which takes 2 arguments - the name of a .mov 
file and a number which represents the number of seconds into that 
movie.  The program then passes this info to MPlayer and produces as 
output a .jpg image which is basically the frame of the movie at the 
stated time.

It's my job to make this a web-based function, and when I try to 
convert my partner's code to a working CGI script, it fails.  
Basically, MPlayer is not being accessed properly.

Does anyone have any insight or has anyone tried to do something 
similar?  I am fairly new to all this...

Thank you!







From grante at visi.com  Wed Apr 20 12:35:26 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 20 Apr 2005 16:35:26 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<N5udnV2nWJmKwfvfRVn-rA@powergate.ca> <42666097.3040405@i.com.ua>
	<dqCdneECDr445vvfRVn-tA@powergate.ca> 
Message-ID: <116d16et9de2146@corp.supernews.com>

On 2005-04-20, Philippe C. Martin <philippe at philippecmartin.com> wrote:

> Although I find them 'cleaner' than goto, would not use goto,
> and certainly do use 'return' in the middle of functions, I
> also agree that some people might think the former do reduce
> code readibility - ex: I , somehow, do not feel good using
> 'continue' and 'break'.

Do you just avoid switch() statements?  Or are you referring
only to loop bodies?

-- 
Grant Edwards                   grante             Yow!  LOOK!!! I'm WALKING
                                  at               in my SLEEP again!!
                               visi.com            


From flupke at nonexistingdomain.com  Mon Apr 11 05:16:28 2005
From: flupke at nonexistingdomain.com (flupke)
Date: Mon, 11 Apr 2005 09:16:28 GMT
Subject: workaround for generating gui tools
In-Reply-To: <slrnd5ids2.2nh.davecook@localhost.localdomain>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<slrnd5ids2.2nh.davecook@localhost.localdomain>
Message-ID: <Mfr6e.62084$s44.4424748@phobos.telenet-ops.be>

Dave Cook wrote:
> On 2005-04-09, flupke <flupke at nonexistingdomain.com> wrote:
> 
> 
>>i create my GUIs mainly via wxGlade. However when you start of to 
>>program and want to do some rearranging to the gui, wxglade overwrites 
>>your file and you've got to put your own code back in.
> 
> 
> How about generating XRC files instead of Python?  I admit I've never tried
> it with wxGlade, so I don't know how well it works, but with the original
> Glade one only uses XML, you can't generate Python at all.
> 
> Dave Cook

That sounds like a good idea. I'm going to check how i can load stuff 
from the resource file.

Thanks for the tip

Regards,
Benedict Verheyen


From grante at visi.com  Fri Apr 22 10:07:31 2005
From: grante at visi.com (Grant Edwards)
Date: Fri, 22 Apr 2005 14:07:31 -0000
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com> <d48heh$goe$1@n6.co.ru>
	<116fpafi
Message-ID: <116i193iteitb8f@corp.supernews.com>

On 2005-04-22, Reinhold Birkenfeld <reinhold-birkenfeld-nospam at wolke7.net> wrote:

>>>> Sure, but what about the case where his program is on paper
>>>> tape and all he has for an editor is an ice pick?
>>>
>>> Then inserting goto doesn't seem to be an acceptable option
>>> either ;)
>> 
>> Scissors, tape, and a box full of prepunched "goto" and
>> "label" statements.  Of course you could do the same with a
>> bunch of pre-punched """ tape-chunks.
>
> Why? You just cut out the piece of paper you want to comment,
> put it in your drawer labeled "comments", and insert it again
> when you need it.

I'd never be able to find it when I needed to put it back in. :)

-- 
Grant Edwards                   grante             Yow!  Like I always
                                  at               say -- nothing can beat
                               visi.com            the BRATWURST here in
                                                   DUSSELDORF!!


From james at wrong.nu  Thu Apr 21 13:13:21 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Thu, 21 Apr 2005 18:13:21 +0100
Subject: goto statement
In-Reply-To: <d48la8$onm$1@news.tsystems.kiev.ua>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<1114100669.807737.192320@l41g2000cwc.googlegroups.com>
	<d48la8$onm$1@news.tsystems.kiev.ua>
Message-ID: <200504211813.30511.james@wrong.nu>

On Thursday 21 April 2005 17:42, Maxim Kasimov wrote:
> > Have you tried the triple quote comment technique?

> how do use this here:

Simple.

> sql = '''
> some long query
> '''

Change this to:

sql = """
some long query
"""

since you shouldn't be using multiple quoting styles in one module, any more 
than you should be using multiple casing styles.

Then just put single quotes around the place where you want to comment. Not 
hard, is it?

james.
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From wp at tekran.spammenziemichnichtdankeschon.com  Thu Apr  7 09:50:08 2005
From: wp at tekran.spammenziemichnichtdankeschon.com (Warren Postma)
Date: Thu, 07 Apr 2005 09:50:08 -0400
Subject: cross platform printing
In-Reply-To: <0hx4e.3479$3O2.2184@trnddc01>
References: <0hx4e.3479$3O2.2184@trnddc01>
Message-ID: <mVa5e.6469$6k4.803027@news20.bellglobal.com>

David Isaac wrote:
> OK, I'll assume silence means "no", so new question:
> What is the current best practice for cross platform printing of PostScript
> files from Python?

Well since printing postscript files on most Unix systems (probably 
including Mac OSX although I don't really know this for sure) is 
trivially easy, why not investigate using cygwin  on Windows and 
launching an "lpr" task from your python script that prints the given 
postscript file. Implementation time on Unix: 0 minutes, 0 seconds. 
Implementation time on Windows; the time it takes make a cygwin batch 
file that prints using ghostscript.

Regards,

Warren


From dsilva at ccs.neu.edu  Fri Apr  1 02:18:32 2005
From: dsilva at ccs.neu.edu (Daniel Silva)
Date: Fri, 01 Apr 2005 02:18:32 -0500
Subject: Lambda: the Ultimate Design Flaw
Message-ID: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>

Shriram Krishnamurthi has just announced the following elsewhere; it might
be of interest to c.l.s, c.l.f, and c.l.p:
http://list.cs.brown.edu/pipermail/plt-scheme/2005-April/008382.html


                The Fate Of LAMBDA in PLT Scheme v300
                                 or
                  Lambda the Ultimate Design Flaw

About 30 years ago, Scheme had FILTER and MAP courtesy of Lisp hackers
who missed them from their past experience.  To this collection,
Scheme added a lexically-scoped, properly-functioning LAMBDA.  But,
despite of the PR value of anything with Guy Steele's name associated
with it, we think these features should be cut from PLT Scheme v300.

We think dropping FILTER and MAP is pretty uncontroversial; (filter P
S) is almost always written clearer as a DO loop (plus the LAMBDA is
slower than the loop).  Even more so for (map F S).  In all cases,
writing the equivalent imperative program is clearly beneficial.

Why drop LAMBDA?  Most Scheme users are unfamiliar with Alonzo Church
(indeed, they don't even know that he was related to Guy Steele), so
the name is confusing; also, there is a widespread misunderstanding
that LAMBDA can do things that a nested function can't -- we still
recall Dan Friedman's Aha! after we showed him that there was no
difference!  (However, he appears to have since lapsed in his ways.)
Even with a better name, we think having the two choices side-by-side
just requires programmers to think about their program; not having the
choice streamlines the thought process, and Scheme is designed from
the ground up to, as much as possible, keep programmers from thinking
at all.

So now FOLD.  This is actually the one we've always hated most,
because, apart from a few examples involving + or *, almost every time
we see a FOLD call with a non-trivial function argument, we have to
grab pen and paper and imagine the *result* of a function flowing back
in as the *argument* to a function.  Plus, there are *more* arguments
coming in on the side!  This is all absurdly complicated.  Because
almost all the examples of FOLD we found in practice could be written
as a simple loop with an accumulator, this style should be preferred,
perhaps with us providing a simple helper function to abstract away
the boilerplate code.  At any rate, FOLD must fold.

--The PLT Scheme Team


From tjreedy at udel.edu  Thu Apr 21 17:56:05 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 21 Apr 2005 17:56:05 -0400
Subject: __del__ and reference count problem
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be><1114107504.036833.109360@z14g2000cwz.googlegroups.com>
	<4267f1e0$0$8871$636a15ce@news.free.fr>
Message-ID: <d49795$3dk$1@sea.gmane.org>


"tiissa" <tiissa at nonfree.fr> wrote in message 
news:4267f1e0$0$8871$636a15ce at news.free.fr...
> It's interesting to note that self.pop instead of A.pop works as 
> expected.
> But I don't know why A.pop doesn't.

Because the name 'A' is no longer associated with the class object. 
However, self has a reference to the class -- the .__class__ attribute. 
Since self does not itself have a .pop attribute, the attribute resolution 
code then looks at the class.

Terry J. Reedy





From pgmoscatt at optushome.com.au  Sun Apr 10 03:59:15 2005
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Sun, 10 Apr 2005 17:59:15 +1000
Subject: Does Tk provide ComboBox ?
Message-ID: <pan.2005.04.10.07.59.15.983406@optushome.com.au>

Does Tkinter provide a combobox or do I have to find some way of making a
listbox do the job ?

Pete



From ojokimu at yahoo.co.uk  Wed Apr 27 20:28:52 2005
From: ojokimu at yahoo.co.uk (John Ridley)
Date: Thu, 28 Apr 2005 01:28:52 +0100 (BST)
Subject: kdialog and unicode
Message-ID: <20050428002852.35649.qmail@web26809.mail.ukl.yahoo.com>

dmbkiwi wrote:

> I'm trying to get python, unicode and kdialog to play nicely
together.
> This is a linux machine, and kdialog is a way to generate dialog
boxes in
> kde with which users can interact (for example input text), and you
can
> use the outputted text in your script.
> 
> Anyway, what I'm doing is reading from a utf-8 encoded text file
using the
> codecs module, and using the following:
> 
> data = codecs.open('file', 'r', 'utf-8')
> 
> I then manipulate the data to break it down into text snippets.
> 
> Then I run this command:
> 
>>>> test = os.popen('kdialog --inputbox %s' %(data))
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> UnicodeEncodeError: 'ascii' codec can't encode character u'\u017a' in
> position 272: ordinal not in range(128)
> 
> I would really like kdialog display the text as utf-8.  However, it
seems
> that python is trying to pass the utf-8 encoded data as ascii, which
> obviously fails because it can't deal with the utf-8 encoded text. 
Is it
> possible to pass the text out to kdialog as utf-8, rather than ascii?

kdialog will accept a limited form of markup as text, including xml
character escapes. so you should be able to display polish text
correctly using this method:

>>> import os
>>> s = """Wszyscy ludzie rodz\xc4\x85 si\xc4\x99
...  wolni i r\xc3\xb3wni pod wzgl\xc4\x99dem
...  swej godno\xc5\x9bci i swych praw. S\xc4\x85
...  oni obdarzeni rozumem i sumieniem i powinni
...  post\xc4\x99powa\xc4\x87 wobec innych w duchu
...  braterstwa."""
>>> s = s.decode('utf-8').encode('ascii','xmlcharrefreplace')
>>> k = os.popen('kdialog --inputbox "<p>%s</p>"' % s)


John Ridley

Send instant messages to your online friends http://uk.messenger.yahoo.com 


From t-meyer at ihug.co.nz  Wed Apr 13 00:07:47 2005
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 13 Apr 2005 16:07:47 +1200
Subject: os.path.walk
In-Reply-To: <ECBA357DDED63B4995F5C1F5CBE5B1E80297B9C6@its-xchg4.massey.ac.nz>
Message-ID: <ECBA357DDED63B4995F5C1F5CBE5B1E801DB008E@its-xchg4.massey.ac.nz>

> If I have os.path.walk(name, processDirectory, None) and 
> processDirectory needs three arguments how can I ass them 
> because walk only takes 3?

Assuming that processDirectory is a function of yours that returns a bool,
then you'd do something like:

  os.path.walk(name, processDirectory(a,b,c))

Where a, b, and c are the arguments that processDirectory requires.  (You
can add the None parameter to the os.path.walk call, but it won't change
anything, since it's the default).

=Tony.Meyer



From paul at fxtech.com  Thu Apr 28 11:51:28 2005
From: paul at fxtech.com (Paul Miller)
Date: Thu, 28 Apr 2005 10:51:28 -0500
Subject: anonymous functions/expressions without lambda?
In-Reply-To: <d4qveg$5k6$1@gemini.csx.cam.ac.uk>
References: <W47ce.375$Jb6.363@fe63.usenetserver.com>
	<d4qveg$5k6$1@gemini.csx.cam.ac.uk>
Message-ID: <lD7ce.10$Sy6.7@fe18.usenetserver.com>

Michael Hoffman wrote:

> That's what lambda does. But it's going away, you'll have to use def 
> when it does, unless the language designers come up with something better.

Yeah, I'm using lamda now it works nicely/cleanly.

> If a lot of the bindings are actually setting variables, you could do 
> something like this:
> 
> def attrsetter(obj, name, 1):
>     def _return_func(value):
>         return setattr(obj, name, value)
> 
>     return _return_func
> 
> bind('a', attrsetter(foo, "var", 1))
> bind('a', attrsetter(foo, "var", 2))

Ah, perfect. Thanks!



From kasimov at i.com.ua  Fri Apr 29 09:04:18 2005
From: kasimov at i.com.ua (Maksim Kasimov)
Date: Fri, 29 Apr 2005 16:04:18 +0300
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <42720ccb$1_2@newspeer2.tds.net>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<42720ccb$1_2@newspeer2.tds.net>
Message-ID: <d4tbib$cb9$1@news.tsystems.kiev.ua>

Kent Johnson wrote:
> 
> Here is a little cleaner version. It takes about a second to run on my 
> PC. What hardware are you running on?
> 
> path = 'DonQuixote.txt'
> 
> frequency = {}
> 
> for line in open(path):
>     for word in line.split():
>         if frequency.has_key(word):
>             frequency[word] += 1
>         else:
>             frequency[word] = 1
> 
> print len(frequency), 'words'
> 
> 
> Kent

 > for line in open(path):
the line of your example raise another question: opened file will be read at once time, as method readlines() do, or it will be read line by line as method readline() do.
as far i know, it is depends on implementation of method "__iter__" of the object that "open()" returns, so another question: where i can find such an information (about how does such a functions works)?


-- 
Best regards,
Maksim Kasimov
mailto: kasimov at i.com.ua


From max at alcyone.com  Fri Apr  1 05:10:44 2005
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 01 Apr 2005 02:10:44 -0800
Subject: Ternary Operator in Python
In-Reply-To: <mailman.1174.1112342585.1799.python-list@python.org>
References: <20050401072442.73412.qmail@web8408.mail.in.yahoo.com>
	<mailman.1174.1112342585.1799.python-list@python.org>
Message-ID: <wJKdnTn7TsW5g9DfRVn-pw@speakeasy.net>

Sean Kemplay wrote:

> You could use 
> 
> condition and consequent or alternative
> 
> I use it

You should do so cautiously, since if consequent is false, it will not 
behave as suspected.  Not to mention that it's quite unreadable.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Physics, as we know it, will be over in six months.
   -- Max Born (1928)


From bokr at oz.net  Tue Apr 26 01:49:36 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 26 Apr 2005 05:49:36 GMT
Subject: Injecting code into a function
References: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>
Message-ID: <426dab5c.540679656@news.oz.net>

On 25 Apr 2005 03:32:38 -0700, "George Sakkis" <gsakkis at rutgers.edu> wrote:

>Is there a general way of injecting code into a function, typically
>before and/or after the existing code ? I know that for most purposes,
>an OO solution, such as the template pattern, is a cleaner way to get
>the same effect, but it's not always applicable (e.g. if you have no
>control over the design and you are given a function to start with). In
>particular, I want to get access to the function's locals() just before
>it exits, i.e. something like:
>
>def analyzeLocals(func):
>    func_locals = {}
>    def probeFunc():
>        # insert func's code here
>        sys._getframe(1).f_locals["func_locals"].update(locals())
>    probeFunc()
>    # func_locals now contains func's locals
>
>So, how can I add func's code in probeFunc so that the injected code
>(the update line here) is always called before the function exits ?
>That is, don't just inject it lexically in the end of the function if
>there are more than one exit points. I guess a solution will involve a
>good deal bytecode hacking, on which i know very little; if there's a
>link to a (relatively) simple HOWTO, it would be very useful.
>
I'm not clear on what your real goal is, but if you just want a snapshot
of what locals() is just before exiting func, that could be done with
a byte-code-hacking decorator with usage looking something like

    #func defined before this
    func_locals = {}
    @getlocals(func, func_locals)
    def probefunc(): pass

which would make a probefunc function that would be identical to func
except that before exiting, it would do func_locals.update(locals()).
(you might want func_locals to be a list and do func_locals.append(locals())
in case func is recursive and you are interested in the all the locals).

Alternatively, if this is a debugging thing, you might want to look into
sys.settrace -- as in this thing I cobbled together (not tested beyond what you see ;-):

----< tracelocals.py >----------------------------------------------------
class TraceLocals(object):
    from sys import settrace
    def __init__(self, *names, **kw):
        self.names = set(names)
        self.func_locals = kw.get('func_locals', [])    # [(name,locals()), ...] tuples
    def _gwatch(self, frame, event, arg):
        """
        Global scope watcher. When a new scope is entered, returns the local
        scope watching method _lwatch to do the work for that.
        """
        if event=='call':
            name = frame.f_code.co_name   # name of executing scope
            if name in self.names: return self._lwatch # name is one whose locals we want
                
    def _lwatch(self, frame, event, arg):
        if event == 'return':
            self.func_locals.append((frame.f_code.co_name,frame.f_locals))
        else:
            return self._lwatch # keep watching for return event
            
    def on(self):
        """Set the system trace hook to enable tracing. """
        self.settrace(self._gwatch)
    def off(self):
        """Reset the system trace hook to disable tracing. """
        self.settrace(None)
    
def main(modname, entry, *names):
    print 'main(', modname, entry, names,')'
    tr = TraceLocals(*names)
    mod = __import__(modname)
    try:
        tr.on()
        getattr(mod, entry)()
    finally:
        tr.off()
    return tr.func_locals

def test():
    tr = TraceLocals(*'t1 t2 t3'.split())
    def t1():
        x ='t1'
    def t2(y=123):
        y*=2
    def t3():
        t1()
        t2()
        t2('hello ')
    try:
        tr.on()
        t3()
    finally:
        tr.off()
    for name, loc in tr.func_locals: print '%5s: %s' %(name, loc)

if __name__=='__main__':
    import sys
    args = sys.argv[1:]
    if not args:
        raise SystemExit(
            'Usage: python tracelocals.py (-test | module entry name+)\n'
        )
    if args[0]=='-test': test()
    else:
        print args
        func_locals = main(args[0], args[1], *args[2:])
        for name, loc in func_locals: print '%5s: %s' %(name, loc)
--------------------------------------------------------------------------
Test result:

[22:37] C:\pywk\clp\sakkis\tracelocals>py24 tracelocals.py -test
   t1: {'x': 't1'}
   t2: {'y': 246}
   t2: {'y': 'hello hello '}
   t3: {'t2': <function t2 at 0x02EE8ED4>, 't1': <function t1 at 0x02EE8E9C>}

Note that t3 is seeing t1 and t2 in its locals -- I think because they're
visible as cell vars in test. If you put t1-t3 in a separate module, you don't see it:

----< tmod.py >---------------
def t1():
    print '-- t1'
    x ='t1'
def t2(y=123):
    print '-- t2'
    y*=2
def t3():
    print '-- t3'
    t1()
    t2()
    t2('hello ')
-----------------------------

[22:42] C:\pywk\clp\sakkis\tracelocals>py24 tracelocals.py tmod t3 t1 t2 t3
['tmod', 't3', 't1', 't2', 't3']
main( tmod t3 ('t1', 't2', 't3') )
-- t3
-- t1
-- t2
-- t2
   t1: {'x': 't1'}
   t2: {'y': 246}
   t2: {'y': 'hello hello '}
   t3: {}

[22:46] C:\pywk\clp\sakkis\tracelocals>py24 tracelocals.py tmod t3 t2
['tmod', 't3', 't2']
main( tmod t3 ('t2',) )
-- t3
-- t1
-- t2
-- t2
   t2: {'y': 246}
   t2: {'y': 'hello hello '}

Notice that the -- side effects from all being called in the last, but only t2 being captured.

Maybe this will give you something to expand to your needs.

Regards,
Bengt Richter


From lbates at syscononline.com  Fri Apr 22 14:19:10 2005
From: lbates at syscononline.com (Larry Bates)
Date: Fri, 22 Apr 2005 13:19:10 -0500
Subject: Ron Grossi: God is not a man
In-Reply-To: <1114127633.859113.292290@l41g2000cwc.googlegroups.com>
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
Message-ID: <4-CdnYtONKWR3fTfRVn-sA@comcast.com>

You are mistaken.  Your long discourse is an exercise in
reaching a conclusion and then trying your best to take
scripture out of context to support your conclusion.
As humans we will never fully understand the Trinity in
this lifetime.  That God the Father, God the Son and
God the Holy Spirit are somehow a single being.  It
is much like humans.  We are physical, emotional and
spiritual beings ourselves.

I would refer you to the works of C. S. Lewis and Josh
McDowell that at one time believed as you believe,
but when they honestly did their research came to the
obvious correct conclusion that Jesus was in fact
wholly God and wholly Man.  If you honestly want to
know the answer to this question you should do some
additional research with these authors.  They were
skeptics just like you and spent countless hours
researching this material (even in the original texts)
and came to a conclusion that is vastly different from
yours.

Christianity is a difficult religion.  It states very
matter-of-factly that there is only one way to God,
THROUGH JESUS CHRIST.  As humans we don't like this type
of absolute and will struggle against it (as it seems
you are).  It seems inconceivable that all the other
religions could have it wrong.  If we took a vote we
might have done it differently, but then we're not God.
All religions have a vested interest in keeping their
flock.  Even if other religions knew for a fact that
Christ was the incarnate Son of God was crucified for
our sins and was the only way for us to spend eternity
in heaven do you think they would all convert and
begin following Christ?  Not likely.  There is too
much power and money at stake to make that change and
too many religious leaders would lose control and
power that they now posses.

The death and resurrection of Christ is the dividing
line among men.  Either you believe it or you don't.
You can't just ignore it.  If Christ is who he said he
(and others) say he was, then He is "the way".  If not,
he is some poor carpenter with delusions of God-hood
that can be ignored.  Since eternity hangs in the
balance, I pray that you will not make your decision
without making absolutely sure.

Regards,

Larry Bates

Obaid R. wrote:
> SUMMARY
> =======
> 
> For the past few weeks, a self-professed
> internet evangelist has posted several times
> to several news groups to claim several
> points as facts. It would appear that these
> assertions do not stand up to close
> examination, logic and reason, and stand in
> direct contradiction to the explicit text
> attributed to Almighty God as found in the
> Bible.
> 
> 
> GOD IS NOT A MAN
> ================
> 
> Mr. Ron Grossi's claim that "God tells us in
> the Bible" that in order to get to heaven
> people need to believe "Christ is Lord" or
> "Christ as Lord" or "Christ Lord" depending
> on the version of the Bible you have, and
> that furthermore, people also need to believe
> that "God raised Him from the dead" is
> typical of the issues we face with his post.
> 
> First of all, it is not Almighty God that is
> telling us these things. It is non other than
> (St.) Paul, whom most Christian scholars
> believe never to have met Christ, peace and
> blessing of Almighty God be upon him (PBBUH)
> in the flesh while he lived on this earth,
> that is allegedly doing the telling, writing
> in the book of Romans, not Almighty God.
> 
> And who is Paul, does anyone know? The reader
> is advised to read from the Bible from the
> book of Acts:
> 
> "But when Paul perceived that the one part
> were Sadducees, and the other Pharisees, he
> cried out in the council, Men and brethren, I
> am a Pharisee, the son of a Pharisee: of the
> hope and resurrection of the dead I am called
> in question." (Acts 23: 6)
> 
> 
> And what did Christ PBBUH himself say
> concerning those?
> 
> "Then Jesus said unto them, Take heed and
> beware of the leaven of the Pharisees and of
> the Sadducees." (Matthew 16: 6)
> 
> 
> And so it appears that Mr. Grossi is
> attributing the alleged words of Paul, whom
> if we are to believe in the Bible, we now
> know who he is and what we should do about
> his leaven, to Almighty God!
> 
> Secondly, the words of Paul and the post of
> Mr. Grossi imply that "Christ is Lord" is equal
> to "Christ is LORD", i.e. that to get to
> heaven people need to believe that Christ is
> Almighty God Himself; but this contradicts
> "the word of God" as found in the Bible, and
> even the words attributed to Christ PBBUH
> himself in the first person as found in the
> New Testament. Please bear with me.
> 
> It is in the Bible that we read Christ PBBUH
> repeatedly described as "a man" (Acts
> 2: 22) and we even read words attributed to
> him in the first person testifying that he is
> "the son of man" (Luke 9: 58). And it is in
> the same Bible that we read it proclaimed
> time after time that "God is not a man ...
> neither the son of man" (Numbers 23: 19).
> 
> And so unless one wishes to dispute what the
> meaning of the word "is" is, then the Numbers
> verse mean what it says: Christ PBBUH was not
> God, is not God, and never will be God.
> Period. After all "God is not a man"
> (Numbers 23: 19) from the beginning of time,
> during the time Christ PBBUH walked this
> earth, and until the end of time.
> 
> Now if Paul meant "Lord" as meaning
> "nobleman", "person in position of
> authority", or "title prefixed to named of
> peers and barons" (all quoted from the A.L.
> Dictionary of Current English), then
> referring to Christ PBBUH as such would have
> been fair.
> 
> It is so because with the English translation
> of the Bible originating from an environment
> where "Lords" abound, it would be a fair
> practice to attribute the word "Lord" in its
> earthly connotations to Christ PBBUH.
> Needless to say that as a messenger and
> prophet of Almighty God, Christ PBBUH does
> indeed deserve that title, especially with
> divine authority to back him up.
> 
> Perhaps it is worth mentioning that Abraham,
> Jacob, and many other prophets, peace and
> blessings of Almighty God be upon them
> (PBBUT), were also referred to as lords. (See
> Genesis 18: 12, and Genesis 32: 4).
> 
> Implying, however, like Mr. Grossi and others
> of like mind do, that "Lord" actually means
> "LORD", then we should refer them back to
> (Numbers 23: 19) I guess. After all, it is
> either Almighty God is telling the truth, or
> they are. There is exclusivity here. God is
> either a man, or He is not a man. And I don't
> know about you, but I prefer to believe
> Almighty God over anyone else.
> 
> Thirdly, In all the versions of the Bible I
> have I cannot find one rendering which reads
> like Mr. Grossi's quote.
> 
> Mr. Grossi's:
> "... and believe in your heart that God
> raised Him from the dead, you WILL
> BE SAVED."
> 
> 
> KJV:
> "... and shalt believe in thine heart that
> God hath raised him from the dead, thou shalt
> be saved." (Romans 10: 9)
> 
> 
> RSV:
> "... and believe in your heart that God raised
> him from the dead, you will be saved."
> (Romans 10: 9)
> 
> 
> ASV:
> ".. and shalt believe in thy heart that God
> raised him from the dead, thou shalt be
> saved:" (Romans 10: 9)
> 
> 
> YLT:
> "... and mayest believe in thy heart that God did
> raise him out of the dead, thou shalt be
> saved," (Romans 10: 9)
> 
> 
> Note that in all versions of the Bible quoted
> from that Mr. Grossi's "God raised Him" is
> rendered (more or less) "God raised him." The
> word "him," referring to Christ PBBUH, is in
> lower case. This shows that this Biblical
> text, even when attributed to Paul, seems
> still in keeping with the spirit of Numbers
> 23: 19, namely that "God is not a man ...
> neither the son of a man" to deserve a
> capitalized LORD, so to speak. That Mr.
> Grossi or people of like mind are miss-
> quoting here and then implying an anti-truth
> does not make this miss-quote divine truth by
> their merely repeating it.
> 
> Also do note that it reads "God raised him."
> In other words, the raising is attributed
> here to Almighty God, while the object of the
> raising is meant to be Christ PBBUH. And
> the fact that "him" was used instead of
> "Himself" effectively rules out (also in
> keeping with the spirit of the word of God as
> found in the Bible that God is not a man)
> that Christ PBBUH was ever God.
> 
> 
> GOD WILL NOT DWELL ON THE EARTH
> ===============================
> 
> Mr. Grossi then proceeds to claim that:
> 
> "Over 2000 years ago God came from Heaven
> to earth in the person of Jesus Christ to
> shed His blood and die on a cross to pay
> our sin debt in full."
> 
> 
> It does not take much to note that this is
> a claim yet to be backed up with supporting
> evidence. As a matter of fact and after
> reading from 1 Kings (see below) one would be
> quick to conclude that this claim is yet
> again made in direct contradiction to the
> "word of God" as found in the Bible.
> 
> "But will God indeed dwell on the earth?
> behold, the heaven and heaven of heavens
> cannot contain thee; how much less this house
> that I have builded?" (1 Kings 8: 27)
> 
> 
> So, it is according to the Bible of all books
> that not only "God is not a man ... neither
> the son of man," but also that "God will not
> dwell on the earth." Why? Not that we need to
> know why, but apparently because "the heaven
> and heaven of heavens cannot contain God."
> Note that these are not my words. These are
> verbatim words quoted from the Bible.
> 
> 
> CHRIST WAS NOT CRUCIFIED
> ========================
> 
> It comes as no surprise to me that when Mr.
> Grossi miss-quotes from the Bible and resorts to
> quoting the very people Christ PBBUH warned
> against) to attribute certain words to
> Almighty God that he will arrive at the exact
> opposite of what he intended for.
> 
> The holy book of the Muslims is explicitly
> clear on the idea of the alleged crucifixion of
> Christ PBBUH, and that of the original sin.
> Muslims are told that to believe that we (as
> humans) are to be held accountable for our
> fathers' sins is to imply that Almighty
> God, may He be glorified above all of this,
> is an imperfect unjust God. That for us (as
> humans) to believe that Almighty God requires
> the death of an innocent man (in the person
> of Christ PBBUH) to die for the mistakes of
> anyone also implies that Almighty God, may He
> be glorified above all of this, is an
> imperfect unjust God.
> 
> But since Almighty God is PERFECT in every
> way: power, knowledge, mercy, justice, etc.,
> then to believe in the message of Grossi here
> is to attach an imperfection to Almighty
> God, and is to belittle Almighty God's
> supreme qualities and Majestic Being. In fact
> the Qur'an argues that people who do that
> (i.e., believe that God will blame us for the
> mistakes of others, or that He requires the
> blood of an innocent man for the forgiving of
> the sins of the guilty) are not actually
> worshiping the one true God. Yes Almighty
> God created everyone, but you see, He has
> none of these qualities that people like
> Grossi here attribute to the "God" they
> worship. Hence they are worshiping somebody
> or something other than the true Almighty
> perfect God.
> 
> It is in this light (in spite of the repeated
> messages of anyone) that it becomes revealing
> if the Qur'anic claim that Christ PBBUH was
> not crucified is actually verified in the
> Gospels.
> 
> If we quote from the Qur'an for a change, we
> read Almighty God asserting the following
> while speaking of those who boast that they
> killed the Messiah of God:
> 
> "That they said (in boast), "We killed Christ
> Jesus the son of Mary, the Messenger of
> Allah";- but they killed him not, nor
> crucified him, but so it was made to appear
> to them, and those who differ therein are
> full of doubts, with no (certain) knowledge,
> but only conjecture to follow, for of a
> surety they killed him not:-"
> (Translation, Qur'an, 4: 157)
> 
> 
> This is an amazingly bold statement. One that
> could have come only from one who knows the
> facts. So let's study this matter in the
> Bible.
> 
> 
> COMMON GROUND
> =============
> 
> 
> If we are to examine whether Christ PBBUH was
> crucified or not, we need to agree on common
> ground and define (or underline the meaning
> of) some words. One would have to study what
> "crucified" and "resurrected" mean, and then
> see whether after his alleged crucifixion and
> resurrection, Christ's nature PBBUH agrees with
> these definitions.
> 
> 
> WHAT DOES CRUCIFY MEAN?
> -----------------------
> 
> According to the English language crucify
> means "to cause death by hanging or impaling
> on the cross." Note that death has to occur
> on the cross for the act of crucifixion to be
> considered to have taken place.
> 
> Many people in the Philippines stage mock
> "crucifixions" around the time of "Good Friday"
> to mark the alleged sacrifice of Christ PBBUH.
> But the mere fact, however, that these people
> are brought down alive from the crosses
> automatically nullifies the notion that
> actual crucifixions did take place.
> 
> After all, if one is brought down from the
> cross and he walks around smoking cigarettes
> then he was not technically speaking
> crucified. Yes, he was put up on the cross,
> but since that did not cause death then
> (according to the universally agreed norms of
> language and reason) one cannot say that the
> said man was crucified and be telling the truth.
> 
> The deficiency is in the English language
> which cannot differentiate between putting
> some one up on the cross and having that
> person die on the cross because of being put
> on it. In fact it is for this reason that
> some scholars (Ahmed Deedat of South Africa)
> have suggested the introduction of the word
> "cruci-ficion", i.e. made-believe
> crucifixion, as in a work of fiction, into the
> English language.
> 
> 
> WHAT DOES RESURRECTED MEAN?
> ---------------------------
> 
> Having known what crucifixion means (as
> opposed to cruci-ficion) let's move on to
> study the word "resurrected."
> 
> Amazingly enough, it is in the Bible the one
> finds Christ PBBUH himself in the first
> person defining the resurrected as follows:
> "... neither can they die any more for they
> are equal unto the angles ..." (Luke 20: 36) whom
> the Bible explains are "spirits" (Psalms 104:
> 4), a definition confirmed by Paul who explains
> that the resurrected have a "spiritual body"
> (1 Corinthians: 15: 44).
> 
> Now having known from the Bible (of all books)
> that the resurrected are spirits, ghosts, or
> spooks, and that to be crucified one would
> have to die on the cross, let's study the
> state of Christ PBBUH after his alleged
> crucifixion and resurrection to see if he
> fits the definitions of these words.
> 
> 
> THEY FORSOOK HIM AND FLED
> =========================
> 
> 
> In the Bible, you will read that at the most
> crucial juncture of the life of Jesus *all* his
> disciples forsook him and fled. All of them.
> Read from (Mark 14: 50): "And they all forsook him,
> and fled."
> 
> So the Bible reports Jesus is hanged on the
> cross; this is what people were talking
> about. This is what the disciples had heard
> from hearsay, because they had "ALL FORSOOK
> HIM AND FLED." (Mark 14: 50) (Emphasis added).
> Likewise, they had heard from hearsay that
> Christ PBBUH had given up the ghost on the
> cross. This is what people were talking
> about. This is what the absent disciples
> assumed then to be the sad end to their Rabbi.
> 
> Proof of that is evident in their terror when
> Christ PBBUH goes to the upper room after his
> alleged crucifixion and resurrection, when he
> says to them: "Peace be unto you." (Luke
> 24: 36). [This is the official Muslim greeting
> by the way].
> 
> Instead of going to kiss and hug their Rabbi,
> "they were terrified and affrighted, and
> supposed that they had seen a spirit." (Luke
> 24: 37).
> 
> Why were they terrified? They were so because
> they thought they had seen a *spirit*. After
> all they had heard (as opposed to witnessed)
> that Christ PBBUH had given up the ghost on the
> cross.
> 
> But did they? Did they see a spirit?
> 
> 
> A SPIRIT HATH NOT FLESH AND BONES
> =================================
> 
> 
> Speaking after his alleged crucifixion
> and resurrection (when he ought to have been
> a spirit), Christ PBBUH is reported as saying:
> 
> "And he said unto them, Why are ye troubled?
> and why do thoughts arise in your hearts?
> Behold my hands and my feet, that it is I
> myself: handle me, and see; for a SPIRIT hath
> not FLESH and BONES, as ye SEE me HAVE."
> (Luke 24:38-39) (Emphasis is mine)
> 
> 
> Christ PBBUH is emphatic about it: Christ
> PBBUH says he was no spirit. Christ PBBUH
> says he is still alive. And alive does not
> equal resurrected. Must we remind ourselves
> that a resurrected entity in Christ's own words
> is "equal unto the angels." (Luke 20:36),
> i.e., spirit, spook, ghost?
> 
> 
> PLEASE TELL THEM
> ================
> 
> 
> And so here we must ask Mr. Grossi to please
> tell the truth seeker, that according to your own
> scriptures that the resurrected are not
> spirits, when your own Bible says they are
> so. Tell them that (St.) Paul didn't define
> the resurrected as having "spiritual bodies,"
> (1 Corinthians: 15: 44), when he did so. Tell
> them that Christ did not define the
> resurrected as "equal unto the angles," (Luke
> 20: 36), when he preached so. Tell them that
> your own scriptures does not say that the
> angels are spirits, (Psalms 104: 4) when it
> does so. Tell them that a spirit has flesh
> and bones, when Christ himself says it is not
> so. Tell them that Christ was not of flesh
> and bones after he allegedly died for our
> sins, when he himself says he was so. Please
> tell them.
> 
> Please tell them how when asked in four
> different places in the Bible "how can I
> inherit eternal life?" that instead of
> repeating his unchanging answer: your
> salvation is in the law, keep the
> commandments (See Mark 10:17-19, Luke 18:18-
> 20, Luke 10:25-28, and Matthew 19:16-19),
> that Christ PBBUH says "believe that I am God
> incarnate and you shall be saved" when he
> never did so. Tell them that he answers
> "believe I am part of a trinity and you shall
> be saved" when he never preached so. Tell
> them that he proclaims "wait until I am
> crucified and then accept my sacrifice after
> I am resurrected and you shall be saved" when
> he never once said so. Not once. Please tell
> them.
> 
> 
> WHAT IS INIQUITY?
> =================
> 
> 
> Iniquity is injustice. This act takes place
> when one is entrusted to judge in a matter
> and he/she takes the right of someone and
> gives to another without proof and rightfull
> claim and in spite of the same.
> 
> Can you guess what is the highest form of
> iniquity? It is the taking of the right to
> deity (which is rightfully and uniquely
> Almighty God's) and giving it to those who
> don't deserve it, to those who never claimed it,
> and to those who even denied it.
> 
> 
> Almighty God says, warning us:
> 
> "And the two seas are not alike: this, fresh,
> sweet, good to drink, this (other) bitter,
> salt. And from them both ye eat fresh meat
> and derive the ornament that ye wear. And
> thou seest the ship cleaving them with its
> prow that ye may seek of His bounty, and that
> haply ye may give thanks.
> 
> "He maketh the night to pass into the day and
> He maketh the day to pass into the night. He
> hath subdued the sun and moon to service.
> Each runneth unto an appointed term. Such is
> Allah, your Lord; His is the Sovereignty; and
> those unto whom ye pray instead of Him own
> not so much as the white spot on a date-
> stone.
> 
> "If ye pray unto them they hear not your
> prayer, and if they heard they could not
> grant it you. On the Day of Resurrection they
> will disown association with you. None can
> inform you like Him Who is Aware.
> 
> "O mankind! Ye are the poor in your relation
> to Allah. And Allah! He is the Absolute, the
> Owner of Praise.
> 
> "If He will, He can be rid of you and bring
> (instead of you) some new creation. That is
> not a hard thing for Allah."
> (Translation, Glorious Qur'an, 35: 12-17)
> 
> 
> 
> As foretold by Almighty God in the Qur'anic
> verse 15 shown above, Christ's PBBUH
> Judgement's Day words to those who work
> iniquity is amazingly confirmed in the Bible:
> 
> "Many will say to me in that day, Lord, Lord,
> have we not prophesied in thy name? and in
> thy name have cast out devils? and in thy
> name done many wonderful works?
> 
> "And then will I profess unto them, I
> never knew you: depart from me, ye that work
> iniquity." (Matthew 7: 22-23)
> 


From neuhauser+python-list#python.org at sigpipe.cz  Fri Apr 22 03:40:55 2005
From: neuhauser+python-list#python.org at sigpipe.cz (Roman Neuhauser)
Date: Fri, 22 Apr 2005 09:40:55 +0200
Subject: regarding system function
In-Reply-To: <20050422073533.28224.qmail@web8408.mail.in.yahoo.com>
References: <20050422073533.28224.qmail@web8408.mail.in.yahoo.com>
Message-ID: <20050422074055.GB74505@isis.sigpipe.cz>

# prabapython at yahoo.co.in / 2005-04-22 08:35:33 +0100:
> 
> --- Robert Kern <rkern at ucsd.edu> wrote:
> > praba kar wrote:
> > >      In Php If I send a command to system function
> > > then It will return 1 on success and 0 on failure.
> > >  So based upon that value I can to further work.
> > > 
> > >      But In Python If I send a command to system
> > > function then It will return 0 only for both
> > > conditions(success and failure).
> > 
> > Are you sure about that?
> > 
> > In [3]:os.system('cat foo')
> > cat: foo: No such file or directory
> > Out[3]:256
> > 
> 
> I agree above statement but When I delete a directory
> os.system('rm -rf test')
> 0
> if directory is not present then I again try to
> delete
> os.system('rm -rf test') 
> now this time also It will print
> 0

    that's the standard behavior of the -f switch

-- 
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man.  You don't KNOW.
Cause you weren't THERE.             http://bash.org/?255991


From steve at holdenweb.com  Fri Apr  8 14:02:13 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 14:02:13 -0400
Subject: Can dictionary values access their keys?
In-Reply-To: <d36fp0$suk$1@vegh.ks.cc.utah.edu>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>	<mailman.1544.1112978919.1799.python-list@python.org>
	<d36fp0$suk$1@vegh.ks.cc.utah.edu>
Message-ID: <d36gq1$3gn$1@sea.gmane.org>

Matthew Thorley wrote:
> Steve Holden wrote:
> while not impossible (using Python's excellent
> 
>>introspection facilities) is way beyond what most people would consider
>>practical. Obviously the garbage collector has to solve this problem,
>>but you *really* don't want to be doing this stuff in Python unless you
>>absolutely *must*.
>>
>>regards
>> Steve
> 
> 
> 
> Thanks very much for the detailed reply. Let me explain in a little more
> detail what I am doing, and perhaps you could let me know if I am going
> about it the wrong way.
> 
> 
> I am creating an object database to store information about network
> devices, e.g. switches and routers.
> 
> At the top level there are device objects, every device object contains
> a mib object--and other various properties--where the actual data is
> stored. The mib object is a dicitionary--or at least subclasses
> dictionary--where the key is the oid (a unique string) and the value is
> a special object called Datapoint. Datapoints come in two types Static
> and Dynamic, and every Datapoint is unique.
> 
> So a simple structure looks something like this:
> 
> Device1
>   Mib1
>      {'1.3.6.1':Datapoint-x1,
>       '1.3.6.2':Datapoint-y1,
>       '1.1.5.4':Datapoint-z1,
>       '1.2.7.3':Datapoint-q1}
> 
> Device2
>   Mib2
>      {'1.3.6.1':Datapoint-x2,
>       '1.3.6.2':Datapoint-y2,
>       '1.1.5.4':Datapoint-z2,
>       '1.2.7.3':Datapoint-q2}
> 
> In the example Datapoint-xx should be read as, some unique data point in
> memory.
> 
> The key in the Mib object is important because it is used by the
> Datapoint is points to to look up its current value on the given device,
> which is why I asked the two questions.
> 
> In my program I use snmp to look up values on network devices. i.e. 'Go
> find the value of 1.3.6.1 from device1.' I want to be able to say
> something like Device1.Mib['1.3.6.1].update(), and the correct Datapoint
> discovers its key (oid) and parent device, then executes an snmp query
> that looks something like this snmpget(keyThatPointsToSelf,
> parentObj.ipAddress, parentObj.paramx)
> 
> I know of course I could keep all this in a relational database and do a
> bunch of queries, but that would really suck! and I would have to track
> all the Devices and oids my self. What I really want is smart objects
> that think for me--thats what computers are for, right? ;)
> 
> I thought my design was a wonderfuly beautiful use of python an oop, but
> perhaps I am mistaken and there is a much more pragmatic way to get the
> job done. In the end preformance doesn't matter a lot. The front end
> will be web based, so if the db can process faster than http/javascript
> and user Bob who has to mouse, then everything will be fine.
> 
> Let me know what you think
> Thanks much
> --Matthew

I think that since each Datapoint appears to be unique, the simplest 
thing to do is to include a reference to the parent object as an 
attribute of the datapoint. Presumably when you create the Datapoint you 
already know which Device and Mib it's going to be stored in, so why 
make work for yourself when you can trade a little storage and make the 
whole thing easy?

You might also be interested to know that the Python Software Foundation 
funded the development of a Python package to support SNMP as a part of 
its first round of grant funding last year, so there's at least one 
other person working on this stuff!

   http://www.python.org/psf/grants/

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From fredrik at pythonware.com  Wed Apr 20 13:39:28 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 20 Apr 2005 19:39:28 +0200
Subject: Troll? was: Re: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com><mailman.2164.1113998230.1799.python-list@python.org><d45gap$elj$1@news.tsystems.kiev.ua><87vf6hlkix.fsf@wilson.rwth-aachen.de><d45kna$f1o$1@news.tsystems.kiev.ua><70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com><d45to7$g02$1@news.tsystems.kiev.ua><mailman.2184.1114013215.1799.python-list@python.org><d460o7$g7j$1@news.tsystems.kiev.ua>
	<d461cm$4c6$1@sea.gmane.org>
	<797fe3d40504201009182c45c6@mail.gmail.com>
Message-ID: <d463s7$dr9$1@sea.gmane.org>

Bill Mill wrote:

> I believe he meant obfuscating bytecode for a commercial product, to
> try and avoid decompilation, which is often a desirable function for
> commercial entities.

there is no shortage of "jump" instructions on the bytecode level, so if he wants
to obfuscate bytecode, all he has to do is to obfuscate the bytecode.

>>> import dis
>>> [op for op in dis.opname if op.startswith("JUMP")]
['JUMP_FORWARD', 'JUMP_IF_FALSE', 'JUMP_IF_TRUE', 'JUMP_ABSOLUTE']

</F>



From vze4rx4y at verizon.net  Fri Apr  1 13:52:00 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Fri, 01 Apr 2005 18:52:00 GMT
Subject: Case-insensitive dict, non-destructive, fast, anyone?
References: <du7psxen5nv.fsf@lehtori.cc.tut.fi>
Message-ID: <kLg3e.203$7b.56@trndny02>

[Ville Vainio]
> I need a dict (well, it would be optimal anyway) class that stores the
> keys as strings without coercing the case to upper or lower, but still
> provides fast lookup (i.e. uses hash table).


>>> class S(str):
    def __hash__(self):
        return hash(self.lower())
    def __eq__(self, other):
        return self.lower() == other.lower()


>>> d = {}
>>> d[S('ThE')] = 'quick'
>>> d[S('the')]
'quick'
>>> d
{'ThE': 'quick'}


Raymond Hettinger




From fuzzyman at gmail.com  Tue Apr  5 06:20:34 2005
From: fuzzyman at gmail.com (fuzzyman at gmail.com)
Date: 5 Apr 2005 03:20:34 -0700
Subject: Python Google Server
Message-ID: <1112696434.623557.97000@g14g2000cwa.googlegroups.com>

I've hacked together a 'GoogleCacheServer'. It is based on
SimpleHTTPServer. Run the following script (hopefully google groups
won't mangle the indentation) and set your browser proxy settings to
'localhost:8000'. It will let you browse the internet using google's
cache. Obviously you'll miss images, javascript, css files, etc.

See the world as google sees it !

(This is actually an 'inventive' short term measure to get round a
restrictive internet policy at work :-) I'll probably put it in the
Python Cookbook as it's quite fun (so if line lengths or indentation is
mangled here, try there). Tested on Windows XP, with Python 2.3 and IE.



# Copyright Michael Foord, 2004 & 2005.
# Released subject to the BSD License
# Please see http://www.voidspace.org.uk/documents/BSD-LICENSE.txt

# For information about bugfixes, updates and support, please join the
Pythonutils mailing list.
# http://voidspace.org.uk/mailman/listinfo/pythonutils_voidspace.org.uk
# Comments, suggestions and bug reports welcome.
# Scripts maintained at http://www.voidspace.org.uk/python/index.shtml
# E-mail fuzzyman at voidspace.org.uk

import google
import BaseHTTPServer
import shutil
from StringIO import StringIO
import urlparse

__version__ = '0.1.0'


"""
This is a simple implementation of a server that fetches web pages
from the google cache.

It lets you explore the internet from your browser, using the google
cache.

Run this script and then set your browser proxy settings to
localhost:8000

Needs google.py (and a google license key).
See http://pygoogle.sourceforge.net/
and http://www.google.com/apis/
"""

cached_types = ['txt', 'html', 'htm', 'shtml', 'shtm', 'cgi', 'pl',
'py']
google.setLicense(google.getLicense())
googlemarker = '''<i>Google is not affiliated with the authors of this
page nor responsible for its
content.</i></font></center></td></tr></table></td></tr></table>\n<hr>\n'''
markerlen = len(googlemarker)

class googleCacheHandler(BaseHTTPServer.BaseHTTPRequestHandler):
    server_version = "googleCache/" + __version__
    cached_types = cached_types
    googlemarker = googlemarker
    markerlen = markerlen

    def do_GET(self):
        f = self.send_head()
        if f:
            self.copyfile(f, self.wfile)
            f.close()

    def send_head(self):
        """Common code for GET and HEAD commands.

        This sends the response code and MIME headers.

        Return value is either a file object (which has to be copied
        to the outputfile by the caller unless the command was HEAD,
        and must be closed by the caller under all circumstances), or
        None, in which case the caller has nothing further to do.

        """
        print self.path
        url = urlparse.urlparse(self.path)[2]
        dotloc = url.find('.') + 1
        if dotloc and url[dotloc:] not in self.cached_types:
            return None     # not a cached type - don't even try

        thepage = google.doGetCachedPage(self.path)
        headerpos = thepage.find(self.googlemarker)
        if headerpos != -1: # remove the google header
            pos = self.markerlen + headerpos
            thepage = thepage[pos:]

        f = StringIO(thepage)

        self.send_response(200)
        self.send_header("Content-type", 'text/html')
        self.send_header("Content-Length", str(len(thepage)))
        self.end_headers()
        return f

    def copyfile(self, source, outputfile):
        shutil.copyfileobj(source, outputfile)


def test(HandlerClass = googleCacheHandler,
         ServerClass = BaseHTTPServer.HTTPServer):
    BaseHTTPServer.test(HandlerClass, ServerClass)


if __name__ == '__main__':
    test()



From dan at dontspammecauseidontlikit.com  Thu Apr 21 20:50:50 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Fri, 22 Apr 2005 08:50:50 +0800
Subject: Strings
References: <5s9f61t9o5iv2qa5vccq3757djq0e0usor@4ax.com>
	<UbqdnXN1cNHbKfrfRVn-rw@powergate.ca>
Message-ID: <ucig61lc1pe4vgkm45iufk8dj4nfl8p0nr@4ax.com>

On Thu, 21 Apr 2005 10:09:59 -0400, Peter Hansen <peter at engcorp.com>
wrote:

Thanks, that's exactly what I wanted.  Easy when you know how.

Dan

>Dan wrote:
>> I've having trouble coming to grip with Python strings.
>> 
>> I need to send binary data over a socket.  I'm taking the data from a
>> database.  When I extract it, non-printable characters come out as a
>> backslash followed by a three numeric characters representing the
>> numeric value of the data.  I guess this is what you would call a raw
>> Python string.  I want to convert those four characters ( in C-think,
>> say "\\012" ) into a single character and put it in a new string.
>
>Does this help?
>
> >>> s = 'foo \\012 bar'
> >>>
> >>> s.decode('string-escape')
>'foo \n bar'
> >>> print s.decode('string-escape')
>foo
>  bar
> >>>
>
>Note that the \n in the first one is because I didn't
>*print* the result, but merely allowed the interpreter
>to call repr() on it.  repr() for a newline is of course
>backslash-n, so that's what you see (inside quotation marks)
>but the string itself has only 9 characters in it, as
>you wished.
>
>-Peter



From __peter__ at web.de  Thu Apr 14 02:08:10 2005
From: __peter__ at web.de (Peter Otten)
Date: Thu, 14 Apr 2005 08:08:10 +0200
Subject: Newbie Tkinter Question
References: <425d9284$0$572$ed2e19e4@ptn-nntp-reader04.plus.net>
Message-ID: <d3l1c3$42n$04$1@news.t-online.com>

Pseud O'Nym wrote:

> the following fragment doesn't cause any errors and results in buttons the
> correct size for the images, but the buttons don't work, and the images
> aren't displayed. If I add a text property, and remove the images, they
> work fine, so the rest of my code's OK. I've searched this group and
> Python.org to no avail.
> 
> class App:
>   def __init__(self, master):
>     frame = Frame(master)
>     frame.pack(side=LEFT, fill=Y)
>     image1 = PhotoImage(file='button_a.gif')
>     self.button = Button(frame, image=image1)
>     self.button.pack(side=TOP)

      self.image = image1

> Can anyone enlighten me?

For reasons that are beyond me widgets do not increase the reference count
of a PhotoImage. Therefore you have to put a reference to the image
elsewhere, e. g. into the App instance, to prevent it from being
garbage-collected when the image1 variable goes out of scope.

Peter



From cpghost at cordula.ws  Wed Apr 13 06:33:31 2005
From: cpghost at cordula.ws (Cordula's Web)
Date: 13 Apr 2005 03:33:31 -0700
Subject: for line in file weirdness
Message-ID: <1113388411.589754.82600@f14g2000cwb.googlegroups.com>

Hello,

here's a strange bug (?) I've came across (using Python 2.2):

# loop_1
for line in file:
    if some_condition(line): break
    do_something()

# loop_2
for line in file:
    do_something_else()

The problem is, that loop_2 doesn't resume where loop_1 left off, but
skips many lines (a block's worth or so) before continuing.

Why is this? Is reading from a file non-reentrant?

It is always possible to slurp the whole file content into a list, and
then iterate through the list, but I want to handle HUGE files too.

Thanks,
-cpghost.

-- 
Cordula's Web. http://www.cordula.ws/



From cappy2112 at gmail.com  Fri Apr 15 17:23:15 2005
From: cappy2112 at gmail.com (Cappy2112)
Date: 15 Apr 2005 14:23:15 -0700
Subject: changing colors in python
In-Reply-To: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>
References: <1113511856.510914.103960@z14g2000cwz.googlegroups.com>
Message-ID: <1113600195.517377.278190@z14g2000cwz.googlegroups.com>

if you are talking about writing text console program only , for
Windows, then just use the color command- but you will need a handle to
that console window-

C:\>help color
Sets the default console foreground and background colors.

COLOR [attr]

  attr        Specifies color attribute of console output

Color attributes are specified by TWO hex digits -- the first
corresponds to the background; the second the foreground.  Each digit
can be any of the following values:

    0 = Black       8 = Gray
    1 = Blue        9 = Light Blue
    2 = Green       A = Light Green
    3 = Aqua        B = Light Aqua
    4 = Red         C = Light Red
    5 = Purple      D = Light Purple
    6 = Yellow      E = Light Yellow
    7 = White       F = Bright White

If no argument is given, this command restores the color to what it was
when CMD.EXE started.  This value either comes from the current console
window, the /T command line switch or from the DefaultColor registry
value.
Press any key to continue . . .



From peter.schorn at acm.org  Thu Apr  7 15:12:40 2005
From: peter.schorn at acm.org (Peter Schorn)
Date: Thu, 07 Apr 2005 21:12:40 +0200
Subject: math - need divisors algorithm
In-Reply-To: <gXq2e.24021$IH3.1980@fe3.news.blueyonder.co.uk>
References: <gXq2e.24021$IH3.1980@fe3.news.blueyonder.co.uk>
Message-ID: <42558629$1_1@news.bluewin.ch>

Philp Smith wrote:
> Hi
> 
> Does anyone have suggested code for a compact, efficient, elegant, most of 
> all pythonic routine to produce a list of all the proper divisors of an 
> integer (given a list of prime factors/powers) 
> 
> 

What about

# Returns a list of all divisors of n = a1^e1*a2^e2* ... *an^en where
# input parameter l = [(a1, e1), (a2, e2), ..., (an, en)]
def divisors(l):
     if	l: return [i*j for i in [l[0][0]**k for k in range(l[0][1] + 1)]
       for j in divisors(l[1:])]
     else: return [1]


# divisors([(2,3),(3,2)]) == [1, 3, 9, 2, 6, 18, 4, 12, 36, 8, 24, 72]


Regards, Peter


From aisaac0 at verizon.net  Mon Apr  4 17:36:02 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Mon, 04 Apr 2005 21:36:02 GMT
Subject: checkbook manager -> cross platform printing
References: <_A34e.2207$1r6.248@trnddc02>
Message-ID: <6ri4e.3393$3O2.1384@trnddc01>

"Alan Isaac" <aisaac0 at verizon.net> wrote in message
news:_A34e.2207$1r6.248 at trnddc02...
> I'd like to try personal financial management using Python.
> I just found PyCheckbook, but it does not support check printing.
> Is there a Python check printing application kicking around?


OK, I'll assume silence means "no", so new question.
What is the current be practice for cross platform printing of PostScript
files from Python?
Same question for PDF.  (I'm aware of
URL:http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html.)

Thanks,
Alan Isaac




From ruach at chpc.utah.edu  Fri Apr  8 12:33:53 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 10:33:53 -0600
Subject: Can dictionary values access their keys?
In-Reply-To: <slrnd5dbs1.f3b.axel@m2.sine>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu> <slrnd5dbs1.f3b.axel@m2.sine>
Message-ID: <d36bpj$s59$1@vegh.ks.cc.utah.edu>

Axel Straschil wrote:
> 
> For unique values, I did something like that couple of weeks ago, the
> thing you would need is the getKey thing, it's fast, but needs much
> memory for big structures becouse I use two dicts.

Thanks for the tip, I may give that a try. I'll be interested to see
what kind of speed penalty I pay. The data I am using has multiples
dictionaries with maybe a thousand entries each. But each entry is an
object containing a history of data with perhaps hundreds or even
thousands more entries. So we're talking about maybe a million+ total
nested key:values. I don't know if that counts as large or not. I can't
even guess how much k memory that is.

I must say I am *very* suprised that python does not have a way to look
up what key is pointing to a given object--without scanning the whole
list that is. Is that what list.index() does under-the-hood? I mean is
list.index(y) just the same as

itemnum = 0
for item in list:
	if y == item:
		return itemnum
	else:
		itemnum = itemnum+1


I think I am going to have to reevaluate my system design... grrr.

thanks
--
Matthew


From stuff at slinkp.com  Tue Apr 12 02:09:11 2005
From: stuff at slinkp.com (Paul Winkler)
Date: 11 Apr 2005 23:09:11 -0700
Subject: HTTPSConnection script fails, but only on some servers (long)
Message-ID: <1113286151.373379.30670@l41g2000cwc.googlegroups.com>

This is driving me up the wall... any help would be MUCH appreciated.
I have a module that I've whittled down into a 65-line script in
an attempt to isolate the cause of the problem.

(Real domain names have been removed in everything below.)

SYNOPSIS:

I have 2 target servers, at https://A.com and https://B.com.
I have 2 clients, wget and my python script.
Both clients are sending GET requests with exactly the
same urls, parameters, and auth info.

wget works fine with both servers.
The python script works with server A, but NOT with server B.
On Server B, it provoked a "Bad Gateway" error from Apache.
In other words, the problem seems to depend on both the client
and the server. Joy.

Logs on server B show malformed URLs ONLY when the client
is my python script, which suggests the script is broken...
but logs on server A show no such problem, which suggests
the problem is elsewhere.

DETAILS

Note, the module was originally written for the express
purpose of working with B.com;  A.com was added as a point of reference
to convince myself that the script was not totally insane.
Likewise, wget was tried when I wanted to see if it might be
a client problem.

Note the servers are running different software and return different
headers. wget -S shows this when it (successfully) hits url A:

 1 HTTP/1.1 200 OK
 2 Date: Tue, 12 Apr 2005 05:23:54 GMT
 3 Server: Zope/(unreleased version, python 2.3.3, linux2) ZServer/1.1
 4 Content-Length: 37471
 5 Etag:
 6 Content-Type: text/html;charset=iso-8859-1
 7 X-Cache: MISS from XXX.com
 8 Keep-Alive: timeout=15, max=100
 9 Connection: Keep-Alive

... and this when it (successfully) hits url B:

 1 HTTP/1.1 200 OK
 2 Date: Tue, 12 Apr 2005 04:51:30 GMT
 3 Server: Jetty/4.2.9 (Linux/2.4.26-g2-r5-cti i386 java/1.4.2_03)
 4 Via: 1.0 XXX.com
 5 Content-Length: 0
 6 Connection: close
 7 Content-Type: text/plain

Only things notable to me, apart from the servers are the "Via:" and
"Connection:" headers. Also the "Content-Length: 0" from B is odd, but
that doesn't seem to be a problem when the client is wget.

Sadly I don't grok HTTP well enough to spot anything really
suspicious.

The apache ssl request log on server B is very interesting.
When my script hits it, the request logged is like:

A.com - - [01/Apr/2005:17:04:46 -0500] "GET
https://A.com/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
HTTP/1.1" 502 351

... which apart from the 502, I thought reasonable until I realized
there's
not supposed to be a protocol or domain in there at all.  So this is
clearly
wrong. When the client is wget, the log shows something more sensible
like:

A.com - - [01/Apr/2005:17:11:04 -0500] "GET
/SkinServlet/zopeskin?action=updateSkinId&facilityId=1466&skinId=406
HTTP/1.0" 200 -

... which looks identical except for not including the spurious
protocol and domain, and the response looks as expected (200 with size
0).

So, that log appears to be strong evidence that the problem is in my
client
script, right?  The failing request is coming in with some bad crap in
the path, which Jboss can't handle so it barfs and Apache responds with

Bad Gateway.  Right?

So why does the same exact client code work when hitting server B??
No extra gunk in the logs there. AFAICT there is nothing in the script
that could lead to such an odd request only on server A.


THE SCRIPT

#!/usr/bin/python2.3

from httplib import HTTPSConnection
from urllib import urlencode
import re
import base64

url_re = re.compile(r'^([a-z]+)://([A-Za-z0-9._-]+)(:[0-9]+)?')

target_urls = {
    'B': 'https://B/SkinServlet/zopeskin',
    'A': 'https://A/zope/manage_main',
}

auth_info= {'B':    ('userXXX', 'passXXX'),
            'A':    ('userXXX', 'passXXX'),
            }

def doRequest(target, **kw):
    """Provide a trivial interface for doing remote calls.
    Keyword args are passed as query parameters.
    """
    url = target_urls[target]
    user, passwd = auth_info[target]
    proto,host,port=url_re.match(url).groups()
    if port:
        port = int(port[1:])   # remove the ':' ...
    else:
        port = 443
    creds = base64.encodestring("%s:%s" % (user, passwd))
    headers = {"Authorization": "Basic %s" % creds }
    params = urlencode(kw).strip()
    if params:
        url = '%s?%s' % (url, params)
    body = None # only needed for POST
    args =('GET', url, body, headers)
    print "ARGS: %s" % str(args)
    conn = HTTPSConnection(host)
    conn.request(*args)
    response = conn.getresponse()
    data = response.read()
    if response.status >= 300:
        print
        msg = '%i ERROR reported by remote system %s\n' %
(response.status,
                                                           url)
        msg += data
        raise IOError, msg
    print "OK!"
    return data

if __name__ == '__main__':
    print "attempting to connect..."
    result1 = doRequest('A', skey='id', rkey='id')
    result2 = doRequest('B', action='updateSkinId',
                        skinId='406',  facilityId='1466')
    print "done!"


# EOF


So... what the heck is wrong here?

at-wits-end-ly y'rs,

Paul Winkler



From bjourne at gmail.com  Wed Apr  6 12:43:43 2005
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Wed, 6 Apr 2005 18:43:43 +0200
Subject: unittest vs py.test?
In-Reply-To: <42533b7c.414087696@news.oz.net>
References: <roy-428D85.21040831032005@reader1.panix.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <ixt3e.1907$7b.368@trndny01>
	<424e73a3.100782477@news.oz.net>
	<roy-9BA12E.08481802042005@reader1.panix.com>
	<m3r7hp5njr.fsf@pc150.maths.bris.ac.uk>
	<42533b7c.414087696@news.oz.net>
Message-ID: <740c3aec05040609431f29ea23@mail.gmail.com>

py.test is awesome, but there is one slight flaw in it. It produces to
much output. All I want to see when all tests pass is "All X passes
succeded!" (or something similar). py.test's output can be
distracting.

-- 
mvh Bj?rn


From bokr at oz.net  Fri Apr 29 08:16:28 2005
From: bokr at oz.net (Bengt Richter)
Date: Fri, 29 Apr 2005 12:16:28 GMT
Subject: anonymous function objects?
References: <d4rmmn$1tr$1@news2.rz.uni-karlsruhe.de>
	<7x7jimlfnj.fsf@ruckus.brouhaha.com>
	<d4rqql$54e$1@news2.rz.uni-karlsruhe.de>
	<tNednbwm1NXyG-zfRVn-gw@powergate.ca>
Message-ID: <42721a08.210039060@news.oz.net>

On Thu, 28 Apr 2005 20:57:51 -0400, Peter Hansen <peter at engcorp.com> wrote:

>Uwe Mayer wrote:
>> Unfortunately I want to assign a handler function to an object and something
>> like this does not work:
>> 
>>>>>class Foobar(object): pass
>> 
>> ...
>> 
>>>>>a = Foobar()
>>>>>def a.handler():
>> 
>>   File "<stdin>", line 1
>>     def a.handler():
>>          ^
>> SyntaxError: invalid syntax
>
>But this does work, or something close to it:
>
> >>> class Foobar(object): pass
>...
> >>> def handler(self):
>...   print 'in handler'
>...
> >>> f = Foobar()
> >>> f.handler()
>Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>AttributeError: 'Foobar' object has no attribute 'handler'
> >>>
> >>> import new
> >>> f.handler = new.instancemethod(handler, f)
> >>> f.handler()
>in handler
>

Or you can doctor up a Foobar that treats all
function attributes of its instances as methods
to be bound to the specific instance, e.g.,
(not tested beyond what you see)

 >>> class Foobar(object):
 ...     def __getattribute__(self, attr):
 ...         sentinel = object()
 ...         atto = object.__getattribute__(self, '__dict__').get(attr, sentinel)
 ...         if hasattr(atto, '__get__'): return atto.__get__(self, type(self))
 ...         elif atto is sentinel: return object.__getattribute__(self, attr)
 ...         return atto
 ...
 >>> f = Foobar()
 >>> def handler(self): print 'handler of:', self
 ...
 >>> f.handler = handler
 >>> f.handler()
 handler of: <__main__.Foobar object at 0x02F0428C>
 >>> f
 <__main__.Foobar object at 0x02F0428C>
 >>> f.handler
 <bound method Foobar.handler of <__main__.Foobar object at 0x02F0428C>>
 >>> f.h 
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 6, in __getattribute__
 AttributeError: 'Foobar' object has no attribute 'h'
 >>> f.h =123
 >>> f.h
 123
 >>> f.f2 = lambda self: 'Hi'
 >>> f.f2
 <bound method Foobar.<lambda> of <__main__.Foobar object at 0x02F0428C>>
 >>> f.f2()
 'Hi'
 >>> Foobar.ordinary_method = lambda self: 'ordinary'
 >>> f.ordinary_method
 <bound method Foobar.<lambda> of <__main__.Foobar object at 0x02F0428C>>
 >>> f.ordinary_method()
 'ordinary'

Try another Foobar instance:

 >>> g = Foobar()
 >>> g.ordinary_method()
 'ordinary'
 >>> g.handler
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "<stdin>", line 6, in __getattribute__
 AttributeError: 'Foobar' object has no attribute 'handler'
 >>> def g_handler(self): print "g's own handler for", self
 ...
 >>> g.alias = g_handler
 >>> g.alias()
 g's own handler for <__main__.Foobar object at 0x02EF134C>

BTW new.instancemethod(handler, f) seems to duplicate handler.__get__(f),
leaving out the type(f) in handler.__get__(f, type(f)) that would make a bound method,
which is what it is, and which could be set as attribute of anything.

Note the difference between newh which sticks with the f
passed to new.instancemethod, and real, which Foobar.__getattribute__
dynamically attaches to the selected instance:

 >>> import new
 >>> f.newh = g.newh = new.instancemethod(lambda self:('newh', self), f)
 >>> f.real = g.real = lambda self:('real', self)
 >>> f.newh()
 ('newh', <__main__.Foobar object at 0x02F0428C>)
 >>> g.newh()
 ('newh', <__main__.Foobar object at 0x02F0428C>)
 >>> f.real()
 ('real', <__main__.Foobar object at 0x02F0428C>)
 >>> g.real()
 ('real', <__main__.Foobar object at 0x02EF134C>)
                                     ^^^^^^^^^^

IOW, a plain callable has __get__ and gets bound to the instance,
whereas a bound method doesn't have __get__ any more, so it gets
retrieved as a plain attribute. BTW, to get an ordinary function call
for a function attribute of a Foobar instance, you'd have to
eliminate the function's __get__ effect one way or another,
e.g. staticmethod (which really wraps the function with a descriptor,
substituting its own __get__, which Foobar.__getattribute__ uses transparently)

 >>> def sm(firstarg='sm first arg', *args): return firstarg, args
 ...
 >>> g.sm = staticmethod(sm)
 >>> g.sm()
 ('sm first arg', ())
 >>> g.sm
 <function sm at 0x02EE8E9C>
 >>> g.__dict__['sm']
 <staticmethod object at 0x02E8177C>
 >>> g.__dict__['sm'].__get__
 <method-wrapper object at 0x02F0476C>
 >>> g.__dict__['sm'].__get__(g)
 <function sm at 0x02EE8E9C>

Regards,
Bengt Richter


From michele.simionato at gmail.com  Tue Apr 26 11:04:43 2005
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Apr 2005 08:04:43 -0700
Subject: How to start python interactively from python script?
In-Reply-To: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>
References: <1114525741.651784.132250@f14g2000cwb.googlegroups.com>
Message-ID: <1114527883.363407.6990@z14g2000cwz.googlegroups.com>

$ python -i myscript.py

        Michele Simionato



From tiissa at nonfree.fr  Thu Apr 28 13:42:48 2005
From: tiissa at nonfree.fr (tiissa)
Date: Thu, 28 Apr 2005 19:42:48 +0200
Subject: Getting the sender widget's name in function (Tkinter)
In-Reply-To: <jaa7k2-ccg.ln1@lairds.us>
References: <1114545565.116766.157000@f14g2000cwb.googlegroups.com>
	<1114547849.644971.191270@f14g2000cwb.googlegroups.com>
	<opspvv1vyxrqur0o@eb.pragmadev> <jaa7k2-ccg.ln1@lairds.us>
Message-ID: <42712098$0$26202$626a14ce@news.free.fr>

Cameron Laird wrote:
> In article <opspvv1vyxrqur0o at eb.pragmadev>,
> Eric Brunel <eric_brunel at despammed.com> wrote:
> 
>>Unfortunately, making a binding to <Button-1> on Button widgets does not
>>have the same behavior as setting their 'command' option.
> 
> Without unraveling my own confusion about who has said what to whom, does
> everyone realize that Tkinter bind()ings inherently can access the widgets
> which generate their events?

I don't know about everyone, but I can assume that's definitively the 
case of infidel (who precisely based the solution you quoted on this) 
and Eric Brunel.

But that may not be the topic at hand. Indeed, the main point is that, 
according to Eric, bind() and command don't behave in the exact same way.

And the OP asked about having a reference on the widget using the 
command callback (that, contrary to event-binded callbacks, don't get 
passed any argument).


So far, the OP is proposed the choice to either use the event/bind 
mecanism or use different callbacks for his different buttons (either 
with the method I proposed or not).


From ajikoe at gmail.com  Sun Apr 24 11:02:09 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 24 Apr 2005 08:02:09 -0700
Subject: thread lock object.
In-Reply-To: <426ba849$0$166$e4fe514c@news.xs4all.nl>
References: <1114347545.147038.265210@g14g2000cwa.googlegroups.com>
	<426ba849$0$166$e4fe514c@news.xs4all.nl>
Message-ID: <1114354929.394991.289390@z14g2000cwz.googlegroups.com>

thanks.

Pujo



From Jeremy.Maxfield at gmx.net  Wed Apr  6 10:17:42 2005
From: Jeremy.Maxfield at gmx.net (Max)
Date: Wed, 6 Apr 2005 16:17:42 +0200
Subject: Resticted mode still active (error?)
Message-ID: <d30r27$m7t$1@news.mch.sbs.de>

I thought restricted mode had been removed from Python
but it seems to be active for Python 2.3.5 +.

I'm using the JEP product which allows integration
of Java with Python (see http://jepp.sourceforge.net) via
starting a Python interpreter in the same process as the
JVM.
This integrates with python via the C interface, allowing
the user to 'eval' python code (amongst other features).

It seems that since Python 2.3.5 any threads (using the
threading module) created via code that has been
evaluated through the jep.eval() interface (i.e.Python C
interface )are executed in restricted mode and cannot,
for example, create files. Code that is just evaled (i.e not
in a subthread) thread has no restrictions.

The error reported is:
IOError: file() constructor not accessible in restricted
mode

(see http://sourceforge.net/forum/forum.php?
thread_id=1247793&forum_id=376782) - I've given a JEP
specific example here.

There seems to be a similar problem with mod_python
(see
http://www.modpython.org/pipermail/mod_python/2005-
January/017129.html)

Reading through the release notes for Python 2.3.5
I see:
Bug #754449: threading.Thread will no longer mask
exceptions raised during interpreter shutdown with
another exception caused by attempting to output the
initial exception. This fix also includes a backport of rev.
1.41 from HEAD.

This might be the problem as it seems to involve the
porting of 2.4 threading code back to the 2.3 tree.

The error output is:
Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Python24\Lib\threading.py", line 442, in
__bootstrap
File "<string>", line 5, in run
IOError: file() constructor not accessible in restricted
mode

2.4.1c1 (#63, Mar 10 2005, 10:36:41) [MSC v.1310 32
bit (Intel)]
Creating file from main thread...
Done
Creating file from sub thread...
Done

Has anyone got any ideas about this?

Thanks in advance,
Max




From sharidas at zeomega.com  Wed Apr  6 09:27:31 2005
From: sharidas at zeomega.com (Satchidanand Haridas)
Date: Wed, 06 Apr 2005 18:57:31 +0530
Subject: A ClientForm Question
In-Reply-To: <1112773578.561333.166300@l41g2000cwc.googlegroups.com>
References: <1112351784.512279.198080@z14g2000cwz.googlegroups.com>	<pan.2005.04.03.12.41.05.4355@f0x.it>
	<87d5ta6w7v.fsf@pobox.com>
	<1112773578.561333.166300@l41g2000cwc.googlegroups.com>
Message-ID: <4253E3C3.4030609@zeomega.com>

Hi,

ClientForm and Mechanize like tools do not execute javascript . You will 
normally have to do them manually in your python code itself. In your 
case, if you have a button, which (and I assume) executes some 
javascript code that sets some hidden variable and/or changes the 
'action' attribute of the form, you will have to change/assign those 
elements in your python code itself.

ClientForm and mechanize can get tedious to use when one has a lot of 
JavaScript functionality in the form.

Hope this answered your question... :-)

regards,
Satchit


narke wrote:

>John J. Lee wrote,
>
>  
>
>>See second bullet point under "Why does .click()ing on a button not
>>    
>>
>work for me?".
>
>Thanks for you advice. However, after read through the FAQs, I have not
>managed to find a solution for my problem.  I belive my button is
>coupled with some Java script which mess thing up and there is no a
>easy solution.  Am I right?
>
>-
>narke
>
>  
>


From kraus at hagen-partner.de  Wed Apr 20 03:10:33 2005
From: kraus at hagen-partner.de (Wolfram Kraus)
Date: Wed, 20 Apr 2005 09:10:33 +0200
Subject: Writing to stdout and a log file
In-Reply-To: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
References: <1113956275.697789.324730@o13g2000cwo.googlegroups.com>
Message-ID: <d44v94$k3d$1@ork-un.noris.net>

Mike wrote:
> I would like my 'print' statements to send its output to the user's
> screen and a log file.
> 
> This is my initial attempt:
> 
> class StdoutLog(file):
>     def __init__(self, stdout, name='/tmp/stdout.log',
> mode='w',bufsize=-1):
>         super(StdoutLog, self).__init__(name,mode,bufsize)
>         self.stdout = stdout
>     def write(self, data):
>         self.stdout.write(data)
What happens when you do a self.stdout.flush() here?

>         self.write(data)
> 
> import sys
> sys.stdout = StdoutLog(sys.stdout)
> print 'STDOUT', sys.stdout
> 
> When the program is run the string is written to the log file but
> nothing appears on my screen. Where's the screen output?
> 
> It looks like the superclass's write() method is getting called instead
> of the StdoutLog instance's write() method.
> 
> The python documentation says 'print' should write to
> sys.stdout.write() but that doesn't seem to be happening.
> 
> Any idea what's going one? 
> Or ideas on how to debug this?
> 
> Thanks, Mike
> 

I had the same problem (writing to file and stdout with print) and my 
solution was *not* to subclass file and instead add a 
self.outfile=file(...) to the constructor.

HTH,
Wolfram


From k.robert at gmx.de  Tue Apr  5 10:05:57 2005
From: k.robert at gmx.de (Robert)
Date: 5 Apr 2005 07:05:57 -0700
Subject: SSL and Proxy problem with urllib2 ?
Message-ID: <19804fd8.0504050605.7dbdace8@posting.google.com>

using a proxy and https/SSL together I get the following SSL error :

  File "dscore.pyo", line 2257, in UrlOpenEx
  File "ClientCookie\_urllib2_support.pyo", line 572, in open
  File "ClientCookie\_urllib2_support.pyo", line 472, in http_response
  File "ClientCookie\_urllib2_support.pyo", line 589, in error
  File "urllib2.pyo", line 304, in _call_chain
  File "ClientCookie\_urllib2_support.pyo", line 181, in http_error_302
  File "ClientCookie\_urllib2_support.pyo", line 566, in open
  File "urllib2.pyo", line 324, in open
  File "urllib2.pyo", line 304, in _call_chain
  File "ClientCookie\_urllib2_support.pyo", line 807, in https_open
  File "ClientCookie\_urllib2_support.pyo", line 656, in do_open
  File "httplib.pyo", line 712, in endheaders
  File "httplib.pyo", line 597, in _send_output
  File "httplib.pyo", line 564, in send
  File "httplib.pyo", line 985, in connect
  File "socket.pyo", line 73, in ssl
sslerror: (1, 'error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol')

using python 2.3.5

any Ideas about the problem?

Robert


From Bill at SynectixLtd.com  Tue Apr 19 05:27:33 2005
From: Bill at SynectixLtd.com (Bill Davy)
Date: Tue, 19 Apr 2005 10:27:33 +0100
Subject: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib,
	winzip barfs on Python-2.4.1.tar, cannot download bzip2
In-Reply-To: <b273c74105041810094301e2c2@mail.gmail.com>
Message-ID: <20050419092741.8ABC71E4004@bag.python.org>

Hi Jim,
I'm not sure that it would be the complete answer, but could you zip me
python24_d.(lib/dll/exp) ?
We are not on VC7.1 (our customer has a mountain of legacy code) and I do
not want to be incompatible with them.  I will see if I can run MSVC6
alongside VC7.1 but have to put customer compatibility firts (I have tried
to edge them on but without success).
Many thanks
	Bill

-----Original Message-----
From: James Carroll [mailto:mrmaple at gmail.com] 
Sent: 18 April 2005 18:10
To: Bill Davy; python-list at python.org
Subject: Re: (Python newbie) Using XP-SP2/MSVC6: No Python24_d.lib, winzip
barfs on Python-2.4.1.tar, cannot download bzip2

Hi Bill,

Python 2.4 requires VC7.1 I just ran into this recently.  Once I
installed VC7.1, I could easily compile the Python source to create a
debug lib.

Winzip should be able to read the python source tarball... There is
one trick though.  Once you download it, it might get renamed to
python.tar.gz.tar  and the trick is to rename the file's extension to
tar.gz or (my preference)  .tgz.

If it really is a bzip2 file, then you'll need some sort of bunzip.  I
use the cygnus version, but I don't remember having to do anything out
of the way for the python source.

-Jim

On 4/18/05, Bill Davy <Bill at synectixltd.com> wrote:
> 
> "A.B., Khalid" <abkhd at earth.co.jp> wrote in message
> news:1113834504.919986.129180 at z14g2000cwz.googlegroups.com...
> > Bill Davy wrote:
> >> I downlaoded and installed
> >> http://www.python.org/ftp/python/2.4.1/python-2.4.1.msi
> >>
> >> I'm trying to build an extension using SWIG 1.3.24 and the linker
> > needs
> >> python24_d.lib (I do not have the DLL either).  I've not found it in
> > any of
> >> the
> >> downloads.
> 
> > I am no expert in MSVC6, but it sounds like maybe you need to supply
> > the no-debug switch in your extention setup.py file: /d NDEBUG.
> >
> > In case that does not work and help on this is not forthcoming, you can
> > always try pyMinGW[1].
> >
> >
> > Regards,
> > Khalid
> 
> Hmm, that's one possibility but I really do need to keep the debugger
> version going.  I'm only just getting started.  Any other suggestions?
> 
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 
>





From programmer.py at gmail.com  Wed Apr 27 22:42:22 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Wed, 27 Apr 2005 21:42:22 -0500
Subject: PyGTK vs. wxPython
In-Reply-To: <1114626660.172481.303090@z14g2000cwz.googlegroups.com>
References: <1114444582.909431.245450@f14g2000cwb.googlegroups.com>
	<mailman.2580.1114613011.1799.python-list@python.org>
	<1114616192.342452.178720@o13g2000cwo.googlegroups.com>
	<mailman.2584.1114617214.1799.python-list@python.org>
	<1114626660.172481.303090@z14g2000cwz.googlegroups.com>
Message-ID: <d52c72d205042719423234fc5d@mail.gmail.com>

On 27 Apr 2005 11:31:00 -0700, dcrespo <dcrespo at gmail.com> wrote:
> Correct me if I'm wrong: XRCed doesn't allow to do MDI Parent and Child
> frames, but simple apps only.
> For what you wouldn't use it? And instead, what would you use instead?
> GUI Hand coding?
> 
> Daniel
> 

Looking at the docs, both wx.MDIChildFrame and wx.MDIParentFrame are
derived from wx.Frame.  So, you *ought* to be able to create a
wx.Panel with one of the aforementioned windows as its parent.  When
wx.Frame is given a single child window, it expands that window to use
all of the available client space.

Really though, these questions are more suited for the wxPython mailing list.

jw


From modelnine at ceosg.de  Thu Apr  7 00:44:27 2005
From: modelnine at ceosg.de (Heiko Wundram)
Date: Thu, 7 Apr 2005 06:44:27 +0200
Subject: Python backend binding to PAM, NSS or pppd
Message-ID: <200504070644.32136.modelnine@ceosg.de>

Hey all!

Before I start hacking away, I'm looking for a Python backend binding for 
libpam or libnss, or a python binding for the pppd plugin mechanism.

I'm trying to set up an SQL authentication scheme for virtual user accounts 
used for mail and PPTP-VPN-access, and I'd love to do the authentication bit 
in Python. And, yes, I know about pam-mysql and nss-mysql, but both projects 
are old and unmaintained, and I use Oracle as backend DB anyway.

If anybody knows of any project which has implemented a part of this, I'd love 
to hear about the effort...

-- 
--- Heiko.
listening to: Wir Sind Helden - Du Erkennst Mich Nicht Wieder
  see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/
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From richardblackwood at cloudthunder.com  Sat Apr 23 22:20:51 2005
From: richardblackwood at cloudthunder.com (Richard Blackwood)
Date: Sat, 23 Apr 2005 22:20:51 -0400
Subject: Variables
Message-ID: <426B0283.40602@cloudthunder.com>

To All:

    Folks, I need your help. I have a friend who claims that if I write:

foo = 5

then foo is NOT a variable, necessarily. If you guys can define for me 
what a variable is and what qualifications you have to back you, I can 
pass this along to, hopefully, convince him that foo is indeed a variable.

Thanks all!

Richard B.


From quentel.pierre at wanadoo.fr  Wed Apr  6 05:41:12 2005
From: quentel.pierre at wanadoo.fr (quentel.pierre at wanadoo.fr)
Date: 6 Apr 2005 02:41:12 -0700
Subject: Web application toolkit recommendation?
In-Reply-To: <mailman.1333.1112659316.1799.python-list@python.org>
References: <mailman.1333.1112659316.1799.python-list@python.org>
Message-ID: <1112780472.948835.232070@f14g2000cwb.googlegroups.com>

You can also take a look at Karrigell
(http://karrigell.sourceforge.net). You can write pure Python scripts
or use a PHP-like syntax, and it is shipped with gadfly, an SQL engine,
and with KirbyBase, a database engine which uses a Pythonic syntax. As
for all the web frameworks, you can also work with the APIs available
for almost any database under the sun



From cjbottaro at alumni.cs.utexas.edu  Fri Apr  8 14:50:39 2005
From: cjbottaro at alumni.cs.utexas.edu (Christopher J. Bottaro)
Date: Fri, 08 Apr 2005 13:50:39 -0500
Subject: base64 interoperability
References: <d36j9a$b23$1@sea.gmane.org>
Message-ID: <d36jkc$b23$2@sea.gmane.org>

Christopher J. Bottaro wrote:

> Python's base64 module encodes and decodes differently than PHP's. 
> Python's docs says that it ahere's to RFC1521 (sept 1993), while PHP's
> adheres to
> RFC2045 (nov 1996).  Is there any Python module that uses the new
> standard? Why is Python using the old standard anyways?
> 
> Thanks.

Forgot to mention that I'm using 2.3.  2.4 says it adheres to yet a
different RFC.  Anyone know if 2.4 will encode/decode base64 in such a
manner that it will work with PHP (5.0.4)?

Thanks.



From ajikoe at gmail.com  Wed Apr 13 06:46:04 2005
From: ajikoe at gmail.com (ajikoe at gmail.com)
Date: 13 Apr 2005 03:46:04 -0700
Subject: how to explain such codes, python's bug or mine?
In-Reply-To: <d3irjm$msg$1@scotsman.ed.ac.uk>
References: <d3iqhe$1s0l$1@mail.cn99.com><d3irjm$msg$1@scotsman.ed.ac.uk>
Message-ID: <1113389164.495602.86170@f14g2000cwb.googlegroups.com>

Hi

The second style can be used:
   j = range(20)
  print j
  L = [x for x in j if x > 10]
  j = L

There are another method such poping the item based on last index to 0:
 for i in range(len(j)-1,0-1,-1):
    if j[i]<=10:
      j.pop(i)
 
 print j

Pujo



From eric_brunel at despammed.com  Fri Apr 29 03:57:58 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 29 Apr 2005 09:57:58 +0200
Subject: tkinter text width
References: <mailman.2550.1114560111.1799.python-list@python.org>
	<mailman.2593.1114624338.1799.python-list@python.org>
	<pan.2005.04.27.19.10.51.37432@jerf.org>
	<mailman.2598.1114631546.1799.python-list@python.org>
	<opspxoust6rqur0o@eb.pragmadev>
	<vf12711vgh28t57udpqulfi4lmupno7k2u@4ax.com>
Message-ID: <opspzhqwi6rqur0o@eb.pragmadev>

On Thu, 28 Apr 2005 16:14:02 GMT, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> On Thu, 28 Apr 2005 10:36:18 +0200, "Eric Brunel"
> <eric_brunel at despammed.com> declaimed the following in comp.lang.python:
>
>> This is the case on all platforms, but far more sensible on Windows: Windows attempts to be "clever" and corrects the font size you give depending on your screen resolution so that a 12 point font is supposed to be actually 12/72 inches *on screen* (obviously ignoring the fact that this is almost never
>
> 	Pardon? Since when has Windows attempted to scale fonts for
> screen display based on screen resolution?
>
> 	The older Macs were fixed at 72 pixels per inch -- with the
> result that the /only/ way to increase the resolution was to physically
> change to a larger monitor. This is why they were so popular for DTP --
> the on-screen view WAS the same size as the printed view.
>
> 	Windows display properties defaults to an /assumed/ 96 pixels
> per inch regardless of the screen resolution (right-click the desktop
> background, properties, Settings/Advanced, General). This is why
> changing to a low-resolution (like the recovery mode screen on W98) on a
> large monitor results in such a pixilated, large-character, display.
>
> 	I'm currently running a 20" flat-panel at 1600x1200. It also
> appears to be about 12" vertical display region, making for
> 100pixels/inch. If I set it to 800x600, it would be running at 50pixels
> per inch -- even though Windows is still assuming 96ppi for rendering. A
> 12pt typeface would be just under 1/8" on normal, but 1/4" on the low
> resolution setting.

Sorry for that: my mistake. Anyway, the problem remains; the ouput for the "tk scaling" command on Windows and Linux is as follows:

[Windows]
% tk scaling
1.33202228777

[Linux]
% tk scaling
1.04285347703

(all of this tested with tcl/tk 8.3 - Windows is Win2k, Linux is an old Mandrake 8.0).

So this means that when you ask for a 12 point font, Windows will give you a 12 * 1.33202228777 = 16 screen pixels font and Linux a 12 * 1.04285347703 = 12 or 13 screen pixels font, depending on how the size is rounded. But the dimensions you set for all widgets are in screen pixels, unless explicitely given in another unit. So either you do a "tk scaling 1" at the beginning of all your apps, or you specify all widget diemnsions as '100p' instead of just 100 for example. If you don't do either, all your texts will look really bigger on Windows than on Linux.
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17;8(%,5.Z65\\'*9--56l7+-'])"


From grig.gheorghiu at gmail.com  Mon Apr 11 17:18:08 2005
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 11 Apr 2005 14:18:08 -0700
Subject: The convenient database engine for a "Distributed" System
In-Reply-To: <op.so26f4jjqfv3if@localhost>
References: <1113253060.465083.110780@f14g2000cwb.googlegroups.com>
	<op.so26f4jjqfv3if@localhost>
Message-ID: <1113254288.660746.174140@z14g2000cwz.googlegroups.com>

I also recommend Firebird. I like the fact that the database is in its
own file that can be copied from one platform to another. I use it on
Linux, but it works just as well on Windows.

Grig



From michael.kearns at REMOVEsaaconsultants.com  Mon Apr 11 11:32:37 2005
From: michael.kearns at REMOVEsaaconsultants.com (Michael Kearns)
Date: Mon, 11 Apr 2005 16:32:37 +0100
Subject: Python 2.4 killing commercial Windows Python development ?
Message-ID: <425a9869$0$38039$bed64819@news.gradwell.net>

I've been using python to write a simple 'launcher' for one of our Java 
applications for quite a while now. I recently updated it to use python 
2.4, and all seemed well.

Today, one of my colleagues noted that on her machine the launcher would 
complain it was missing a DLL - msvcr71.dll

However, there's a very grey area concerning the redistribution of said DLL.

If you've been keeping up with the dev list, and some other web 
discussions, you'll see that this has cropped up several times, but with 
no conclusion in a legal fashion other than 'investigate it on your own 
legal terms'.

I'm now going to have step back to using 2.3 until this issue is solved, 
but judging by the way the dev list discussion just faded, I get the 
impression that it may be a long wait.

I can't see how any company (or individual) can distribute an 
application written in python, and then 'frozen' (I used py2exe) in any 
way if they rely on the python24.dll that ships as standard. This is 
surely a step backwards in usability.

I have no idea concerning the issues of rebuilding a different version 
of python24.dll to be linked against the common msvcr.dll or whatever, 
or changing the 'freeze' applications to do some magic, but I can't 
believe it should be down to the end user to jump through legal or 
compilation hoops when they're trying to use the language.

Apologies if this seems more aggressive than I intended it to be - I'm 
just frustrated at having to stop following my language of choice for 
the foreseeable future so far as my work is concerned.

Michael.


From fredrik at pythonware.com  Sun Apr 17 14:58:28 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 17 Apr 2005 20:58:28 +0200
Subject: Problem with unpack hex to decimal
References: <1113763068.002612.240940@l41g2000cwc.googlegroups.com>
Message-ID: <d3ubdf$1e7$1@sea.gmane.org>

"serpent17 at gmail.com" wrote:

> I was looking at this:
> http://docs.python.org/lib/module-struct.html
> and tried the following
> 
>>>> import struct
>>>> struct.calcsize('h')
> 2
>>>> struct.calcsize('b')
> 1
>>>> struct.calcsize('bh')
> 4
> 
> I would have expected
> 
>>>> struct.calcsize('bh')
> 3
> 
> what am I missing ?

the sentence

    "By default, C numbers are represented in the machine's native format
    and byte order, and properly aligned by skipping pad bytes if necessary
    (according to the rules used by the C compiler)."

and the text and table following that sentence.

</F>



From brian.peyton at gmail.com  Fri Apr 15 13:04:39 2005
From: brian.peyton at gmail.com (brian.peyton at gmail.com)
Date: 15 Apr 2005 10:04:39 -0700
Subject: Python's use in RAD
In-Reply-To: <mailman.1972.1113576517.1799.python-list@python.org>
References: <mailman.1972.1113576517.1799.python-list@python.org>
Message-ID: <1113581399.801318.277950@f14g2000cwb.googlegroups.com>

Active State's Komodo IDE is very nice for python development.  It
includes integration with pdb (python's debugger).  The pro edition
also has a GUI designer, however I've never used it.  The personal
version for non commercial use can be had for $30 (and there's also a
30 day trial).  They have windows, linux, and solaris versions.

Ross Cowie wrote:
> Hi,
>
> I am currenly a second year university student and was wondering if
you
> could help me ut. As part of a project i have decided to write about
python,
> i am not having very much luck with regards to finding infrmation on
pythons
> use in Rapid Application Development, and was wondering of you could
> highlight some of the features that make it suitable for RAD. Like
the use
> of dinamic binding.
>
> Your healp would be appreciated.
> 
> Hope to hear from you soon.
> 
> Ross



From maitj at vianet.ca  Tue Apr  5 10:04:08 2005
From: maitj at vianet.ca (Jeffrey Maitland)
Date: Tue, 5 Apr 2005 10:04:08 -0400
Subject: Class, object question.
Message-ID: <000601c539e8$5a35ac30$d502a8c0@JEFF>

Hello folks, 

 

The question I am having is something like this. 

 

# ignore the precursing ..  I am using them for easy message formatting

 

from point import *

 

Class vector(point): 

..........def __init___(self, point1, point2):

.......self.i = point2.get_x() - point1.get_x()

.......self.j = point2.get_y() - point1.get_y()

.......self.k =  point2.get_z() - point1.get_z()

 

# methods of vector. Defined here. 

 

What I am wondering is if I have a 2nd init  or something similar to
create a vector. Such as what follows and if I can how do I go about
implementing it?

 

Class vector(point): 

..........def __init___(self, point1, point2):

.......self.i = point2.get_x() - point1.get_x()

.......self.j = point2.get_y() - point1.get_y()

.......self.k =  point2.get_z() - point1.get_z()

.

..........def __init___(self, i, j, k):

.......self.i = i

.......self.j = j

.......self.k = k

 

That way I can define a vector either using 2 points or if I have the
vector data itself?

 

Thanks in advance

 

Jeff

 

 

 

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From bokr at oz.net  Tue Apr 19 19:07:42 2005
From: bokr at oz.net (Bengt Richter)
Date: Tue, 19 Apr 2005 23:07:42 GMT
Subject: Array of Chars to String
References: <mailman.2133.1113942800.1799.python-list@python.org>
Message-ID: <42658990.7739398@news.oz.net>

On Tue, 19 Apr 2005 13:33:17 -0700, James Stroud <jstroud at mbi.ucla.edu> wrote:

>Hello,
>
>I am looking for a nice way to take only those charachters from a string that 
>are in another string and make a new string:
>
>>>> astr = "Bob Carol Ted Alice"
>>>> letters = "adB"
>>>> some_func(astr,letters)
>"Bad"
>
>I can write this like this:
>
>astr = "Bob Carol Ted Alice"
>letters = "adB"
>
>import sets
>alist = [lttr for lttr in astr if lttr in Set(letters)]
>newstr = ""
>for lttr in alist:
>  newstr += lttr
>
>But this seems ugly. I especially don't like "newstr += lttr" because it makes 
>a new string every time. I am thinking that something like this has to be a 
>function somewhere already or that I can make it more efficient using a 
>built-in tool.
>
>Any ideas?
>
>James
>
I think this will be worth it if your string to modify is _very_ long:

 >>> def some_func(s, letters, table=''.join([chr(i) for i in xrange(256)])):
 ...     return s.translate(table,
 ...            ''.join([chr(i) for i in xrange(256) if chr(i) not in letters]))
 ...
 >>> some_func("Bob Carol Ted Alice", 'adB')
 'Bad'

see help(str.translate)

If you want to use it in a loop, with the same "letters" I'd want to eliminate the repeated
calculation of the deletions. You could make a factory function that returns a function
that uses deletions from a closure cell. But don't optimize prematurely ;-)

Regards,
Bengt Richter


From kent37 at tds.net  Fri Apr 15 22:58:03 2005
From: kent37 at tds.net (Kent Johnson)
Date: Fri, 15 Apr 2005 22:58:03 -0400
Subject: pre-PEP: Suite-Based Keywords
In-Reply-To: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
Message-ID: <42607b0f$1_2@newspeer2.tds.net>

Brian Sabbey wrote:
> Here is a pre-PEP for what I call "suite-based keyword arguments". The 
> mechanism described here is intended to act as a complement to thunks. 
> Please let me know what you think.
> 
> Suite-Based Keyword Arguments
> -----------------------------
> 
> Passing complicated arguments to functions is currently awkward in 
> Python. For example, the typical way to define a class property winds up 
> polluting the class's namespace with the property's get/set methods.  By 
> allowing keyword arguments to be defined in a suite following a function 
> call, complicated arguments can be passed in a cleaner, easier way.
> 
> Examples
> ========
> 
> Using suite-based keyword arguments, the code
> 
> f(x = 1)
> 
> is equivalent to
> 
> f():
>    x = 1

ISTM the syntax is ambiguous. How do you interpret
if f():
   x = 1
?

Is a suite alllowed only when a block could not be introduced in the current syntax?

Kent


From fgeiger at datec.at  Sun Apr 24 18:41:42 2005
From: fgeiger at datec.at (F. GEIGER)
Date: Sun, 24 Apr 2005 18:41:42 -0400
Subject: [OT] Graphic editor within an MFC app. I have a wxPython prototype,
	that...
Message-ID: <pan.2005.04.24.22.29.27.952568@datec.at>

I have built a wxPython prototype of an app, that lets me place rectangles
o a wxPanel, move them and change their size. How the rects are added
and placed has to follow certain rules.

The final goal is to merge this "graphical editor" into a MFC app.
Converting a standalone wxPython app into a wxWidget app ist not that
complicated. 

But how about merging it into a MFC app? Has anybody achieved that already?

All the functionality lies in my wxPanel-subclass "EditorWidget" and in
the few widgets I can place on it. So it boils down to place that
"EditorWidget" an a MFC-Panel. But what about the mainloops?

If that's not possibel at all, I'd consider getting an ActiveX that offers
to me what I need. It does not need to be a full blown CAD ActiveX but
should be customizeable. Does anyone know a source for such things?

Many thanks in advance and kind regards
Franz GEIGER



From fredrik at pythonware.com  Sun Apr 10 07:30:20 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 10 Apr 2005 13:30:20 +0200
Subject: Signals and system
References: <42590634$0$29863$afc38c87@news.optusnet.com.au>
Message-ID: <d3b3oh$41q$1@sea.gmane.org>

"T Koster" wrote:

> Currently, I am using system (os.system) to run wget.  The mechanism is
> in a loop, so that it will try all the mirrors while wget is exiting
> with a non-zero exit status.  This is working fine as long as the user
> feels there is no need to interrupt it.

any reason you cannot use urllib2 (or urllib) with a socket timeout
instead?

something like:

    import socket, urllib

    list_of_mirrors = ...

    socket.setdefaulttimeout(10)

    for url in list_of_mirrors:
        try:
            f = urllib.urlopen(url)
        except IOError:
            print "trying another mirror"
        else:
            break

    # copy from the f stream to local file

might work.

</F>





From joerg.schuster at gmail.com  Thu Apr 28 03:46:08 2005
From: joerg.schuster at gmail.com (Joerg Schuster)
Date: 28 Apr 2005 00:46:08 -0700
Subject: compile shebang into pyc file
In-Reply-To: <mailman.2591.1114620619.1799.python-list@python.org>
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
	<1114616582.677507.252650@z14g2000cwz.googlegroups.com>
	<mailman.2591.1114620619.1799.python-list@python.org>
Message-ID: <1114674367.988718.44460@g14g2000cwa.googlegroups.com>

> so you're saying that the set of people that can deal with
> no more than one
> file at a time but knows how to install and configure Python
> (which in itself
> comes with a few thousand files) is larger than zero?

Take me as an example: Very often, I needed software that could solve a
specific problem. I used to find, say, 10 different packages. Usually
none of the programs REALLY did the job as I wanted it to be done. Yet,
in order to find this out (or in order to find the package that suited
my needs best), I had to try out all of these packages. This used to
take an unnecessary amount of time.

I would have found (say) one java program, one c++ program, one Python
program, one perl program, ...

I know that java, c++, Python and Perl are all installed on our system.
And if they weren't, I would know how to install them myself: By using
yast or by saying 'apt-get install <package>'.

Yet: I don't want to have to know how to install all these packages in
all these different languages. I think a program should work out of the
box. And the should be no fumbling it out of the box.

J?rg



From michele.petrazzo at TOGLIunipex.it  Wed Apr 13 03:12:04 2005
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Wed, 13 Apr 2005 09:12:04 +0200
Subject: PyChart into web site error
In-Reply-To: <oAW6e.1070$eW7.115@news02.roc.ny>
References: <425c0b61$0$10969$5fc30a8@news.tiscali.it>
	<oAW6e.1070$eW7.115@news02.roc.ny>
Message-ID: <425cc5d0$0$11715$5fc30a8@news.tiscali.it>

Lee Harr wrote:
> On 2005-04-12, Michele Petrazzo <michele.petrazzo at TOGLIunipex.it> wrote:
> 
>>I'm using PyChart like a module for create charts into a little web
>>site, but when I try to create one, I have this error:
>>
>>/var/www/html/lgt/draw.py:19, in draw:
>>can = canvas.init(self.file_name)
>>/usr/lib/python2.3/site-packages/pychart/canvas.py:60, in init:
>>can = pngcanvas.T(fname)
>>/usr/lib/python2.3/site-packages/pychart/pscanvas.py:25, in __init__:
>>basecanvas.T.__init__(self)
>>/usr/lib/python2.3/site-packages/pychart/basecanvas.py:70, in __init__:
>>self.title = re.sub("(.*)\\.py$", "\\1", sys.argv[0])
>>
>>AttributeError: 'module' object has no attribute 'argv'
>>
>>Why my script doesn't have sys.argv?
>>
>>Is there another way to use PyChart into my script?
>>


> You are probably going to have to give more details.
> 
> Is there a file in your html/lgt folder called sys?

No.

 >>> os.listdir('/var/www/html/lgt/')
['engine.py', 'db.py', 'index.spy', 'linetest.py', 'index.html', 
'db_mysql.py', 'mysession.spy', 'cds.html', 'templates', 'tmp', 'draw.py']
 >>>

> 
> How are you serving the pages?

Apache 2.0.48, mod_python 3.1.3 and Python 2.3.3
on my mdk 10.0

Thanks,
Michele


From dave at pythonapocrypha.com  Fri Apr  8 08:34:59 2005
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 08 Apr 2005 06:34:59 -0600
Subject: Sockets
In-Reply-To: <idtb51pj2m244815tcoicsiee7h3n69v9j@4ax.com>
References: <36qb5199613lai084brifj8judpoummv6n@4ax.com>	<mailman.1514.1112928735.1799.python-list@python.org>
	<idtb51pj2m244815tcoicsiee7h3n69v9j@4ax.com>
Message-ID: <42567A73.1070706@pythonapocrypha.com>

Dan wrote:

 >On Thu, 7 Apr 2005 21:52:11 -0500, jepler at unpythonic.net wrote:
 >>Python strings always carry their length, and can have embedded NULs.
 >>   s.write("\0\1\2\3")
 >>should write 4 bytes to the socket 's'.
 >
 >I'm taking binary data from a database, so it's not really a Python
 >string.  Is there an easy way to convert it?

Unless I'm misunderstanding you, you don't need to. It's not that Python 
normal strings are "encoded" in some special format, it's just that a 
string object does not make a distrinction between what is traditionally 
called "text" and "binary data".

Play around with this at a Python prompt to see for yourself. For example:

 >>> img = file('foo.jpg', 'rb').read() # use a real image filename though
 >>> img[:50]
'\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x01\x00H\x00H\x00\x00\xff\xdb\x00C\x00
\x05\x03\x04\x04\x04\x03\x05\x04\x04\x04\x05\x05\x05\x06\x07\x0c\x08\x07\x07\x07
\x07\x0f\x0b\x0b\t'
 >>>

So, the fact that you're getting the data from a database is probably 
immaterial.

HTH,
Dave




From rkern at ucsd.edu  Sun Apr 17 04:43:09 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 17 Apr 2005 01:43:09 -0700
Subject: new to mac OS10
In-Reply-To: <d3t40r$i2k$1@domitilla.aioe.org>
References: <d3mvre$q7m$1@geraldo.cc.utexas.edu>	<1113571800.485209.169320@z14g2000cwz.googlegroups.com>	<d3ojjf$n11$1@geraldo.cc.utexas.edu>	<4261C311.8070502@acm.org>	<mailman.2012.1113707887.1799.python-list@python.org>
	<d3t40r$i2k$1@domitilla.aioe.org>
Message-ID: <d3t7c1$cuk$1@sea.gmane.org>

Maurice LING wrote:
> Robert Kern wrote:
> 
>>> 3. Apple-installed Python's command line tools are symlinked from 
>>> /usr/bin to /System/Library/Frameworks/Python.framework but the OSX 
>>> installer for Python 2.4.1 places the commandline tools in 
>>> /usr/local/bin and symlinked to /Library/Frameworks/Python.framework. 
>>> So it seems to me that Python 2.4.1 (installed using OSX installer 
>>> for Python 2.4.1) is not a precise replacement of Apple-installed 
>>> Python...
>>
>>
>>
>> Bingo. It's not intended to be one.
>>
> 
> Hi Robert,
> 
> Once I've tried to install Python 2.4.1 through the installer Bob 
> Ippolito built. I've already for Fink installed Python 2.3.5 in my 
> system. So,
> 
> /usr/bin/python -> /sw/bin/python

Don't do that. Leave /usr alone! (/usr/local excepted)

Change your PATH environment variable if you want a different Python to 
start up when you type

   $ python

> and the newly installed Python 2.4.1 created /usr/local/bin/python -> 
> /Library/Frameworks/Python.framework/python
> 
> Does /usr/bin/python takes precedence over /usr/local/bin/python?
> 
> Somehow it rings an alarm in me...

That depends on your PATH environment variable, and that only affects 
the command line in a terminal shell.

Anything that looks for /usr/bin/python should find the link to the 
system Python. Anything that just asks for "whatever python comes first 
in your PATH" is customizable via the order of directories in your PATH.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From cam.ac.uk at mh391.invalid  Tue Apr 19 20:42:31 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Wed, 20 Apr 2005 01:42:31 +0100
Subject: poll: does name conventions in python matters?
In-Reply-To: <0O6dnQY2MsOZ7vjfRVn-gQ@powergate.ca>
References: <mailman.2132.1113941497.1799.python-list@python.org>
	<0O6dnQY2MsOZ7vjfRVn-gQ@powergate.ca>
Message-ID: <d448hn$cbk$1@gemini.csx.cam.ac.uk>

Peter Hansen wrote:

> If all the above fail, use "names_like_this" or
> "namesLikeThis".  If you really need somebody else
> to tell you what to use: use the latter, because
> I told you to. ;-)

No, no. Use the former, because *I* told you to. ;-)
-- 
Michael Hoffman


From removethis.kartic.krishnamurthy at gmail.com  Thu Apr 28 17:35:18 2005
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Thu, 28 Apr 2005 21:35:18 GMT
Subject: OOP
In-Reply-To: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
References: <1114709684.096071.109960@l41g2000cwc.googlegroups.com>
Message-ID: <qGcce.982$PA3.627@newssvr31.news.prodigy.com>

The Great 'demon_slayer2839 at yahoo.com' uttered these words on 4/28/2005 
1:34 PM:
> Hey yall,
> I'm new to Python and I love it. Now I can get most of the topics
> covered with the Python tutorials I've read but the one thats just
> stumping me is Object Orientation. I can't get the grasp of it. Does
> anyone know of a good resource that could possibly put things in focus
> for me? Thanks.
> 

I thought the Object Orientation chapter (Chapter 5) of Python in a 
Nutshell by Alex Martelli, gave a good overview for Classes in Python. 
Please take a peek at it and see if it helps you any.

Thanks,
-Kartic


From exogen at gmail.com  Thu Apr 28 12:38:43 2005
From: exogen at gmail.com (Brian Beck)
Date: Thu, 28 Apr 2005 12:38:43 -0400
Subject: Which IDE is recommended?
In-Reply-To: <du7wtqn5e4u.fsf@lehtori.cc.tut.fi>
References: <426f90ac$1_2@rain.i-cable.com> <d4ob28$2r0$1@eeyore.INS.cwru.edu>
	<du764y74djo.fsf@amadeus.cc.tut.fi>
	<d4qamk$59u$1@eeyore.INS.cwru.edu>
	<d4qaqn$59u$2@eeyore.INS.cwru.edu>
	<du7k6mnmcrb.fsf@lehtori.cc.tut.fi>
	<d4qdfg$afj$1@eeyore.INS.cwru.edu>
	<du7wtqn5e4u.fsf@lehtori.cc.tut.fi>
Message-ID: <d4r3il$pu2$1@eeyore.INS.cwru.edu>

Ville Vainio wrote:
> Does this help?

Not really, my PYTHONPATH is fine. I found out that modules imported in
the format "import mx" work fine, but "from mx import DateTime" doesn't
work -- it will still only auto-complete when I type "mx." instead of
realizing that it's in the local scope now. So it's fine all the modules
fine, just placing them wrong in the auto-complete search tree, or
however it works.

--
Brian Beck
Adventurer of the First Order


From deetsNOSPAM at web.de  Mon Apr 18 18:01:50 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Tue, 19 Apr 2005 00:01:50 +0200
Subject: def a((b,c,d),e):
References: <1113854757.229118.137260@g14g2000cwa.googlegroups.com>
Message-ID: <d41ao3$ir$04$1@news.t-online.com>

AdSR wrote:

> Fellow Pythonistas,
> 
> Please check out
> 
> http://spyced.blogspot.com/2005/04/how-well-do-you-know-python-part-3.html
> 
> if you haven't done so yet. It appears that you can specify a function
> explicitly to take n-tuples as arguments. It actually works, checked
> this myself. If you read the reference manual at
> http://docs.python.org/ref/function.html
> really carefully, you will find that it is indeed part of the language
> spec, but it's a likely candidate for the least advertised Python
> feature. Small wonder since it looks like one of those language
> features that make committing atrocities an order of magnitude easier.
> 
> Has anyone actually used it in real code?

Yes, but usually not so much in function arguments but more in
list-comprehensions or other places where unpacking was useful. I love the
feature - I just don't have nested enough data to use it more :)

What python offers in this respect can be seen as a limited form of
pattern-matching known from functional programming - and instead of beeing
considered an atrocity it's actually frequently requested to be enhanced. 

-- 
Regards,

Diez B. Roggisch


From radam2 at tampabay.rr.com  Sat Apr  2 13:39:41 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Sat, 02 Apr 2005 18:39:41 GMT
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
Message-ID: <prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>

On Sat, 02 Apr 2005 19:59:30 +0200, "Diez B. Roggisch"
<deetsNOSPAM at web.de> wrote:

>> statements documenting the flow in a few minutes.  I'm still a bit
>> fuzzy on how the arguments are stored and passed.
>
>The arguments are part of the outer scope of the function returned, and thus
>they ar kept around. That's standart python,too:
>
>def foo():
>    a = 10
>    def bar():
>       return a*a
>    return bar
>
>print foo()()
>
>
>No decorator-specific magic here - just references kept to outer frames
>which form the scope for the inner function.

I followed that part.  The part that I'm having problems with is the
first nested function get's the argument for the function name without
a previous reference to the argument name in the outer frames. So, a
function call to it is being made with the function name as the
argument, and that isn't visable so it looks as if it's magic.

Ok, Since I was using the wrong model the first time, probably due to
not sleeping well and mixing past language experience in improperly,
we will try again.

In the below model, the @decorator, (object or the interpreter
executing the @decorator statement?), calls nested functions in the
function of the same name until it reaches the inner loop which is
then attached to the function name. Is this correct now?

Cheers,
Ron


### Decorator Dissection V.2 ###

print "\n(0) Start reading decorator defs"
def decorator(d_arg):
    print "(3) decorator: gets '"+d_arg+"'"
    
    def get_function(function):
        print "(6) get_function: gets 'func' object"
        
        def wrapper(f_arg): 
            print "(10) wrapper: gets '"+f_arg+"'"
            new_arg = f_arg+'-'+d_arg

            print "(11) wrapper: calls func('"+new_arg+"')"
            result = function(new_arg)
                                        
            print "(13) wrapper: returns '"+result+"'"
            return result

        print "(7) get_function: returns 'wrapper' object"
        return wrapper

    w = get_function 
    print "(4) decorator: return 'get_function' object"
    print '(5) @decorator: calls get_function(func)'
            # Need to print this here, done at *(5)
    return w
                            
print "(1) Done reading decorator defs\n"


print "(2) @decorator: calls decorator('goodbye')"
            # *(5) @decorator: call get_funtion(func)
@decorator('Goodbye')
def func(s):
    print '(12) func returns:', s
    return s
print "(8) @decorator: func = wrapper\n"


print "(9) Call func('Hello') which is now wrapper object:"
result = func('Hello')
print "(14) result gets '"+result+"'\n"

print result                        


#---output---

(0) Start reading decorator defs
(1) Done reading decorator defs

(2) @decorator: calls decorator('Goodbye')
(3) decorator: gets 'Goodbye'
(4) decorator: return 'get_function' object
(5) @decorator: calls get_function(func)
(6) get_function: gets 'func' object
(7) get_function: returns 'wrapper' object
(8) @decorator: func = wrapper

(9) Call func('Hello') which is now wrapper object:
(10) wrapper: gets 'Hello'
(11) wrapper: calls func('Hello-Goodbye')
(12) func returns: Hello-Goodbye
(13) wrapper: returns 'Hello-Goodbye'
(14) result gets 'Hello-Goodbye'

Hello-Goodbye




From james at wrong.nu  Mon Apr 11 10:15:50 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Mon, 11 Apr 2005 14:15:50 +0000
Subject: database in python ?
In-Reply-To: <op.so2d8n2cqfv3if@localhost>
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
Message-ID: <200504111415.56604.james@wrong.nu>

On Monday 11 April 2005 11:01, Pierre-Fr?d?ric Caillaud wrote:
> psycopg ... has a dictfetchall() method which is worth its weight in
> donuts ! 

It's very simple to write one for MySQLdb:

def dictfetchall(cursor):
    '''Takes a MySQLdb cursor and returns the rows as dictionaries.'''
    col_names = [ d[0] for d in cursor.description ]
    return [ dict(zip(col_names, row)) for row in cur.fetchall() ]

In truth, although postgres has more features, MySQL is probably better for 
someone who is just starting to use databases to develop for: the chances are 
higher that anyone using their code will have MySQL than Postgres, and they 
aren't going to need the features that Postgresql has that MySQL doesn't. 
IMO, this has changed since only a year or two ago, when MySQL didn't support 
foreign-key constraints.
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From kent37 at tds.net  Sat Apr 16 11:51:21 2005
From: kent37 at tds.net (Kent Johnson)
Date: Sat, 16 Apr 2005 11:51:21 -0400
Subject: XML parsing per record
In-Reply-To: <pan.2005.04.16.13.24.51.477214@gmail.com>
References: <pan.2005.04.16.13.24.51.477214@gmail.com>
Message-ID: <4261304c_1@newspeer2.tds.net>

Willem Ligtenberg wrote:
> I want to parse a very large (2.4 gig) XML file (bioinformatics ofcourse :))
> But I have no clue how to do that. Most things I see read the entire xml
> file at once. That isn't going to work here ofcourse.
> 
> So I would like to parse a XML file one record at a time and then be able
> to store the information in another object.
> How should I do that?

You might be interested in this recipe using ElementTree:
http://online.effbot.org/2004_12_01_archive.htm#element-generator

Kent


From bearophileHUGS at lycos.com  Sat Apr 30 19:13:36 2005
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 30 Apr 2005 16:13:36 -0700
Subject: ANN: pynetwork 2.25
Message-ID: <1114902816.077510.229560@l41g2000cwc.googlegroups.com>

Pynetwork is a graph library, my first SourceForge project:

http://sourceforge.net/projects/pynetwork/

It included tests, some demo, some premilinary docs, and some images.
You can see some screenshoots on the SourceForge page for them.
I know about 5-6 other graph libraries for Python, one even in C++
(Boost).

This library is quite fast, and it can be imported with:
import graph
I've designed it inspired by the sets.py standard module, but here
there isn't a frozengraph because I think it's not much useful.
Inside the docstrings there are many definitions that can be used as a
graph theory glossary.

Surely there are some things to be fixed, I'm still improving it.
Beside the demos, I can add a kind of tutorial, and few more classical
algorithms.

Comments, suggestions, bug fixes, collaborations, etc., are surely
appreciated.

I don't know if Python will ever have a graph data structure in the
collections standard library, but I've tried by best so far :-)

Bear hugs,
Bearophile
(Remove HUGS from my address if you want to email me)



From michael at stroeder.com  Fri Apr 29 09:07:47 2005
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Fri, 29 Apr 2005 15:07:47 +0200
Subject: undefined symbol: PyUnicodeUCS4_AsUTF8String
Message-ID: <46o9k2-qe4.ln1@nb2.stroeder.com>

HI!

I have the following problem after system upgrade to SuSE Linux 9.3:

$ python -c "import cPickle"
Traceback (most recent call last):
  File "<string>", line 1, in ?
ImportError: /usr/lib/python2.4/lib-dynload/cPickle.so: undefined
symbol: PyUnicodeUCS4_AsUTF8String

The Python 2.4.1 installation was built from source.

Anyone having a clue? Thanks in advance.

Ciao, Michael.


From mwm at mired.org  Sun Apr 24 04:39:04 2005
From: mwm at mired.org (Mike Meyer)
Date: Sun, 24 Apr 2005 03:39:04 -0500
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
	<87hdhxwj6s.fsf@debian.kirkjobsluder.is-a-geek.net>
	<1114274632.128667.281820@l41g2000cwc.googlegroups.com>
	<86br85rvfw.fsf@guru.mired.org>
	<Xns9641B33152AA6castleamber@130.133.1.4>
	<863bthrmtg.fsf@guru.mired.org>
	<Xns9641E05B2BE91castleamber@130.133.1.4>
	<86y8b8rgg5.fsf@guru.mired.org>
	<Xns9642125692F42castleamber@130.133.1.4>
Message-ID: <86d5skr2l3.fsf@guru.mired.org>

John Bokma <postmaster at castleamber.com> writes:

> Mike Meyer wrote:
>> Depends on the problem. If it's one of the things for which Python has
>> an obvious solution (sort a list; split a string on whitespace; pull
>> select list elements based on a criteria of some kind; search a file
>> for lines with a given word in them; etc.) you'd get back the same
>> answer from almost all of them.
>
> And what makes you doubt it would be different with Perl? :-D

Perl's "There's more than one way to do it" attitude.

> ( sort @alist, split ' ', $astring, grep criteria, @list, etc )

In the one case where perl provides you two ways to do things, you
chose the one that doesn't solve the problem. You want map, not grep.

You also chose the wrong way to do things globally, by leaving off the
optional parens on the function invocations. That makes the list a
PITA to parse, in that you have to know the number of arguments to
each function in order to parse the list you provided.

Consider the python version:

         (alist.sort(), astring.split(), [x for x in alist if criteria(x)])

This list can be parsed by a machine. Given proper bindings for all
the variables, Python will turn it into a tuple.

N.B.: split(' ', $astring) is wrong as well. In this case, Perl
doesn't provide the right tool for the job; you have to build it from
parts.

>> As I've said a number of times, this has changed lately as new
>> features have been added without removing their older counterparts.
>
> The only variation I expect for the above Perl solutions is the use of 
> (), and the first argument of split. However, the last one might show 
> some exotic solutions :-)

And those trivial variations are enough that you chose the wrong
ones. And you're (by your own admission) an experienced Perl
programmer.

>>>>>> to do things means developers only have to
>>>>>> worry about impact on that way when making improvements, which
>>>>>> will speed them up.
>>>>> Yeah, Perl programmers are extremely slow ;-)
>>>> Nah, they aren't slow. They just have to worry about more things
>>>> than the Python developers.
>>> Do you have references to this? I would love to see if indeed 100
>>> Python programmers do implement, say 5 CS tasks faster compared to
>>> 100 Perl programmers, on average.
>> 
>> I'm talking about the people developing the language, not the ones
>> developing in the language. And this is just my impression from
>> watching the developers lists.
>
> I have no idea, since I read neither list. I have the idea that Perl is 
> indeed more fat, especially since the (too big) number of built in 
> stuff, that Python has in libraries (where it should be IMNSHO).

If you think Perl is fat now, read the apocalypses for Perl 6. Perl 6
is going to make Common LISP look small.

> One could say (and should) that the regular expression thingy in Perl is 
> a language on its own :-)

It is. For what Perl was designed for, having that be part of the
grammar of the language makes sense. For a general-purpose programming
language, I'm not so sure.

> But you probably agree, that if speed is an issue, and the programmer's 
> skills are not the issue, that the only thing one can do is code it in a 
> different language (probably by another programmer).

I don't agree. The better alternative is to look for a faster
algorithm. Programming "in the large" (as allowed by Python, Perl,
etc. when compared to C) sometimes makes that easier.

Changing languages is a potshoot. I once recoded a Python program into
Eiffel (which is compiled), only to have it slow down by a factor of
4. The program used a large collection of static objects - hundreds of
thousands of them - which the SmallEiffel garbage collector would scan
every time it ran. Python's reference counting ignore them, so the
Python version ran noticably faster even though the basic operations
were all faster in Eiffel.

Now, I could have recoded it in C and gotten *much* faster. But then
I'd have to deal with all the dynamically allocated objects (millions
of them!) by hand, plus writing the code to deal with the trie and
such like. Ugly.

Oh yeah - this algorithm was the third crack at the problem. Changing
the algorithms had sped things up noticably.

>>> I know to little about Python, especially about old Python, to have
>>> an idea of what you mean. I only saw, quite recently, someones
>>> solution to a problem that used 30 lines of Python, and I am sure I
>>> could have written it in 3-4. And I doubt that's because he was
>>> using, or I was thinking in, new Python
>>> :-D.
>> 
>> Just because there's only one obvious way to do things doesn't mean
>> it's obvious to everyone.
>
> My point. Moreover, most skilled Perl programmers (or at least the ones 
> I know) fall back to a shared common set of idioms, which probably are 
> not always the fastest one (which I consider a good thing)). So to them 
> there are often obvious ways to do things. Put them together, and for 
> the small problems you gave they very likely will come up with similar 
> results.
> So restrictions on the number of ways fails for beginners, because: life 
> will find a way. And skilled programmers don't need it, because they 
> somehow stick together.

My experience with Perl is just the opposite. Everytime I have to
maintain Perl code, I come across a different set of idioms - with no
obvious downside to them. You can, of course, define "skilled
programmers" as those who use your idiom set. This makes the set of
skilled Perl programmers very small. That few programmers are skilled
is a downside of TMTOWTDI, as the only time I see new idioms in Python
are newbies doing very odd things here.

I will conceede that the itertools module puts the lie to me. It
provides a lot of list manipulation functions that I haven't
thoroughly explored, which represent new idioms. However, those aren't
part of the grammar of the language, and are a recent addition. It's
not clear how Python should evolve with them added to the language.

>> Witness the recent spate of people asking
>> for "goto".
> I was a witness, moreover I stated my opinion, which in short stated 
> that there is nothing wrong with goto as a statement. Keeping a 
> statement from a language because beginners don't understand it, and 
> write bad code with it, is wrong. Moreover, every time I see some kind 
> of protection in a language, I see people who consider them safe, and 
> make other, equally bad (or worse) mistakes. (See my other replies in 
> this thread regarding the special "protection" PHP has).

I, on the other hand, feel that adding something to the language just
because you can is a *really* bad idea. Unless the new construct
solves a real problem, there's no point in adding it. It just bloats
the language processor and increases the mental load on people who
program in the language. The best you can do is ignore it in your
code, meaning you're going to have pause and think about it every time
you run into it in someone elses code. I never saw a good use case for
goto in Python (as opposed to C, where it's clearly needed).

Adding things just because you can leads to monstrosities like Common
LISP, PL/I, Algol 68 and Perl 6. Adding features only when they add
functionality (or better yet, by removing restrictions) leads to
jewels like Python, Scheme and Eiffel.

> You either understand why something is bad at a given moment, or not. If 
> a language must make up for the understanding a programmer lacks, 
> something is very very wrong.

There's a difference between "making up for the understanding a
programmer lacks" and "handicapping the programmer". Missing gotos is
like missing explicit pointer manipulation. Carefully designed
features added to the language (or restrictions removed from it) can
provide the same functionality as those features, without exposing
programmers to all the potential bugs that can occur when those
features are used.

Adding something that doesn't extend the language and creates
potential bugs is a *mistake*. You run that risk every time you add
just another way to do something.

> I doubt that Python needs a goto, since I am sure it has enough "syntax 
> sugared" versions of goto to solve most, if not all things that one 
> needs a goto for.

Exactly.

>>> After 5 years one gets comfortable with most constructions in a 
>>> language. I am more often uncomfortable with the way someone
>>> translates a problem into code. And there is no way how you can force
>>> people with a language that is, to do that the same, not even close.
>> 
>> Of course not. The best you can do is provide one obvious way to do
>> things, and then hope most people find that.
>
> Beginners get lost anyway, experienced programmers don't need it

I disagree. If there's not one obvious way to do things, experienced
programmers tend to choose the one they are most comfortable with, and
will have to work out what all the others mean. This has been my
experience with Perl and Common LISP, and from what I hear is true of
C++ as well.

On the other hand, my experience with languages that provide one
obvious way to do things (Python, Scheme, Eiffel) is that experienced
programmers tend to find that way, and beginners quickly become
frustrated when they fight the language.

>>>> My Perl evolved from very shell script like (lots of
>>>> backticks and passing around the full text of files)
>>> I am sure you can do that with Python too.
>> That hasn't happened in 9 years of Python.
> That was not what I wrote: I am sure one can program that way in Python 
> too.

No, you said "one can do that with Python", leaving the word "that"
open to interpretation. I assumed you meant "migrate from writing sh
to writing C", which, as I said, hasn't happened.

If you meant writing sh or C in Python, try it. You'll find it clumsy
and frustrating. Python wasn't *designed* to make it comfortable to
write that way. Perl was - just a couple of more ways to do things.


>> Some of the idioms have
>> changed because the language has changed, but not because my
>> perceptions/expectations/etc have changed.
> In 9 years? I learned so much in 9 years about programming that I 
> probably am ashamed to show Perl code I wrote 9 years back :-) (Even if 
> I left out the Perl 4 syntax). Moreover, I think that my current Perl 
> code is quite different from 3-4 years back. And no, not all is related 
> to the "there are more ways to do things". I changed my mind on certain 
> things (mostly style issues), learned new modules (some are really new, 
> others I just didn't know about), but also: I learned new programming 
> techniques, or other ways to look at a problem, and hence, write a 
> different solution (but using the same idioms as 3-4 years back).

The only one of those that really matters is "changing your mind on
certain things". The only way to do that is if there's more than one
way to do those things in the first place. My Perl style changed
radically over the years. My python style has as well, but only
because the language has changed as time passed. In the cases where a
new construct/module hasn't been added, the idiom that was obvious
with Python 1.4 is still the right choice with Python 2.4. With Perl,
there's no obvious right choice, so you and I could both change our
minds.

>>>> to one more
>>>> C-like as I used the language. That change was largely driven by
>>>> performance concerns as my understanding of the language grew.
>>> Yup, in Perl one should program Perl, not bash, not C. Same for
>>> Python. 
>> 
>> Right. But Perl makes it *easy* to program in bash or C while staying
>> in Perl, and provides no obvious drawbacks from doing so - all because
>> it's trying to be comfortable to sh and C programmers by providing
>> ways to do things that those users are comfortable with. Trying to
>> write sh or C in Python is painfull, and you usually run into
>> problems/drawbacks fairly quickly - because that's not the obvious way
>> to do things.
>
> But again, it doesn't keep people who want to do this.

Um - this sentence isn't complete. It doesn't keep those people from
*what*?

A langauge can make it easy to write ugly code, or it can make it hard
to write ugly code. After all, "You can write FORTRAN in any
language(*)". If I have to maintain the code, I'd *much* prefer that
the language make it hard to write ugly code, as I'm that much less
likely to get ugly code to maintain. TMTOWTDI makes it easy to write
ugly code. TOOWTDI makes it hard to write ugly code.

> Also, Perl borrows a lot of its syntax from C, which Python (as far as I 
> have seen) does extremely little, if at all. So it's already easier to 
> program C-like in Perl, by design, even if Perl was as "restrictive" as 
> Python.

If Perl only borrowed a lot of it's syntax from C, this wouldn't be a
problem. But it borrows a lot of it's syntax from sh as well,
sometimes supporting both (because TMTOWTDI). If it had done one or
the other, it would have been a better language.

> If the current direction of Python means relaxing it a bit, I personally 
> think that is a good thing. Sometimes more than one way makes it 
> possible to introduce a construction that's well known in another 
> language, and turn it into an idiom for the "more than one way" 
> language, and hence, teach "new" ideas to people.

Considering that I've been arguing all along that "more than one way"
is a bad thing, I have to disagree with you.

I will agree that adding new idioms from other programming paradigms
is a good thing (see <URL:
http://en.wikipedia.org/wiki/Programming_paradigm >). In theory, the
reason for that is that changing paradigms changes the set of things
you do, so you aren't adding more ways to do things, you're adding
more things to do.

The reality is that such changes often do introduce new ways to do
things that already exist. There have already been threads where it's
been argued (by others - I just read them) that this is detrimental to
Python.

> And my quick peek at http://www.xml.com/pub/a/2004/03/31/pycon.html 
> gives me the impression that the current direction of Python is to make 
> such things available (for example more lazy, which I like thanks to my 
> functional programming experience :-) )

Right. But read <URL: http://www.python.org/peps/pep-3000.html > and
you'll see that many of the things that are now redundant are
scheduled to go away when we break backwards compatability. The
philosophy is still that "There should be one-- and preferably only
one --obvious way to do it." (from "import this"), even if we are
drifting from that in the current implementations.

         <mike

*) I still remember seeing FORTRAN programmers writing ALGOL-W
conditionals as:

             if not condition then
             else
                begin
                code
                end

Because they learned to write the FORTRAN version:

        if (.not. condition) goto 100
           code
  100   continue             

They even had the gall to bitch about it when I marked them down for
it.
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From RonGrossi_38157 at yahoo.com  Sat Apr  9 14:02:12 2005
From: RonGrossi_38157 at yahoo.com (RonGrossi_38157 at yahoo.com)
Date: 9 Apr 2005 11:02:12 -0700
Subject: =?iso-8859-1?q?THE_GREATEST_NEWS_EVER_!_=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E?=
	=?iso-8859-1?q?=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7?=
	=?iso-8859-1?q?=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA?=
	=?iso-8859-1?q?=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0?=
	=?iso-8859-1?q?=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60?=
	=?iso-8859-1?q?=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0?=
	=?iso-8859-1?q?=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E=B7?=
	=?iso-8859-1?q?=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E=2E?=
	=?iso-8859-1?q?=B7=B0=60=B0=BA=B7=2E=2E=2E=B7=B0=60=B0=BA=B7=2E=2E?=
	=?iso-8859-1?q?=2E=B7=B0=60_=28newsgroup-post_127=29?=
Message-ID: <1113068396.414326.217300@o13g2000cwo.googlegroups.com>



The reason some people don't know for sure
if they are going to Heaven when they die
is because they just don't know.

The good news is that you can know for
sure that you are going to Heaven which is
described in the Holy Bible as a beautiful
place with no death, sorrow, sickness or
pain.

God tells us in the Holy Bible how simple
it is to be saved so that we can live
forever with Him in Heaven.

"For if you confess with your mouth Jesus
is Lord and believe in your heart that God
raised Him from the dead, you
WILL BE SAVED." (Romans 10:9)

Over 2000 years ago God came from Heaven
to earth in the person of Jesus Christ to
shed His blood and die on a cross to pay
our sin debt in full.

Jesus Christ was born in Israel
supernaturally to a virgin Jewish woman
named Mary and lived a sinless life for
thirty-three years.

At the age of thirty-three Jesus was
scourged and had a crown of thorns pressed
onto His head then Jesus was crucified.

Three days after Jesus died on a cross and
was placed in a grave Jesus rose from the
dead as Jesus said would happen before
Jesus died.

If someone tells you that they are going
to die and in three days come back to life
again and it happens then this person must
be the real deal.

Jesus Christ is the only person that ever
lived a perfect sinless life.

This is why Jesus is able to cover our
sins(misdeeds) with His own blood because
Jesus is sinless.

The Holy Bible says, "In Him(Jesus) we
have redemption through His blood, the
forgiveness of sins..." (Ephesians 1:7)

If you would like God to forgive you of
your past, present and future sins just
ask Jesus Christ to be your Lord and
Saviour.

It doesn't matter how old you are or how
many bad things that you have done in
your life including lying and stealing
all the way up to murder.

Just pray the prayer below with your
mouth and mean it from your heart and
God will hear you and save you.

Dear Jesus Christ, I want to be saved so
that I can have a home in Heaven with You
when I die. I agree with You that I am a
sinner. I believe that You love me and want
to save me. I believe that You bled and
died on the cross to pay the penalty for my
sins and that You rose from the dead.
Please forgive my sins and come into my
heart and be my Lord and Saviour. Thanks
Lord Jesus Christ for forgiving me and
saving me through Your merciful grace.
Amen.

Welcome to the family of God if you just
allowed God to save you. Now you are a real
Christian and you can know for sure that
you will live in Heaven forever when this
life comes to an end.

As a child of God we are to avoid
sin(wrong doing), but if you do sin the
Holy Bible says, "My dear children, I
write this to you so that you will not sin.
But if anybody does sin, we have one who
speaks to the Father in our defense Jesus
Christ, the Righteous One."

Those of you that have not yet decided to
place your trust in the Lord Jesus Christ
may never get another chance to do so
because you do not know when you will die.

This means that if you die without
trusting in Jesus Christ as your Lord and
Saviour you will be forever separated from
the love of God in a place called Hell.

The Holy Bible descibes Hell as a place of
eternal torment, suffering, pain and agony
for all those who have rejected Jesus Christ.

The good news is that you can avoid Hell by
allowing Jesus Christ to save you today.
Only then will you have true peace in your
life knowing that no matter what happens you
are on your way to Heaven.



Servant of the Lord Jesus Christ,
Internet Evangelist
Ronald L. Grossi


____________________________________________________



Got Questions?
http://www.gotquestions.org/archive.html

Other Languages
http://www.godssimpleplan.org/gsps.html

Free Movie: To Hell and Back
http://www.tbn.org/index.php/8/1.html

Animation
http://www.gieson.com/Library/projects/animations/walk/index.html

The Passion Of The Christ
http://www.thepassionofthechrist.com

Beware Of Cults
http://www.carm.org/cults/cultlist.htm

About Hell
http://www.equip.org/free/DH198.htm

Is Jesus God?
http://www.powertochange.com/questions/qna2.html

Free Online Bible
http://www.bibledatabase.net



From deetsNOSPAM at web.de  Sat Apr  2 14:04:57 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 02 Apr 2005 21:04:57 +0200
Subject: Decorator Dissection
References: <4p9t419ockcg8578g6guse3a14t16orebf@4ax.com>
	<1112455359.773729.92080@l41g2000cwc.googlegroups.com>
	<6git41doqfbk01h8lsk1gl7u91qgspivrp@4ax.com>
	<d2mmhv$vf8$05$1@news.t-online.com>
	<prnt41dcl33b2ldl02dtmhnpsfcv0lsv57@4ax.com>
Message-ID: <d2mqcl$r6t$02$1@news.t-online.com>

> I followed that part.  The part that I'm having problems with is the
> first nested function get's the argument for the function name without
> a previous reference to the argument name in the outer frames. So, a
> function call to it is being made with the function name as the
> argument, and that isn't visable so it looks as if it's magic.

No, its not - but I stepped into that trap before - and thought its magic :)

The trick is to know that

 - a decorator is a callable
 - get passed a callable
 - has to return a callable

So this is the simplest decorator imaginable is:

def identity(f):
    return f

And the decorator _syntax_ is just a python expression that has to be
_evaluated_ to a yield decorator. So

@identity
def foo(self):
    pass

the @identity is just the expression evaluated - to the function reference
to identity, which is callable and follows the decorator protocol - and the
_result_ of that evaluation is called with the callable in question.

So if you want to have _parametrized_ decorators, that expression is
_evaluated_ and has to yield a decorator. Like this:

def arg_decorator(arg):
    def real_decorator(f):
        return f
    return real_decorator

So, this works 

@arg_decorator('fooobar')
def foo(self):
    pass

@arg_decorator('fooobar') is evaluated to real_decorator (which a scope
containing arg), and _that_ gets called with foo.

HTH - bit me the first time too :)


-- 
Regards,

Diez B. Roggisch


From iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid  Mon Apr 18 11:28:13 2005
From: iintbeumtnbfkcpntohw__NOSP at M__xs4all.nl.invalid (Maarten Sneep)
Date: Mon, 18 Apr 2005 17:28:13 +0200
Subject: Can't compile with --enable-shared on MacOSX
References: <6ee58e07.0504180620.4b157ebf@posting.google.com>
Message-ID: <4263d20e$0$149$e4fe514c@news.xs4all.nl>

In article <6ee58e07.0504180620.4b157ebf at posting.google.com>,
 llothar at web.de (Lothar Scholz) wrote:

> i tried to generate a dynamic library from the official
> Python-2.4.0.tgz on MacOSX 10.3 but when i do the
> 
> ./configure --enable-shared ; make ; sudo make install
> 
> It links statically. It's also strange that i can't find a
> libpython2.4.a in my
> /usr/local/lib. It's not installed by the install command.

On Mac OS X the shared library functionality is obtained through 
frameworks. It may detect this by default, but I'm not sure about 
that. In any case read the install documentation, the correct options 
are mentioned there, or you could just use the pre-built binary 
install from python.org

> I get an error that TK/TCL was not found. Is this the reason, i
> thought i can simply ignore this error message.

Is not the reason, will go away once tcl/tk is installed (there is a 
nice binary installer in the mac os x downloads section at apple.com

Maarten


From Pierre_Rouleau at impathnetworks.com  Fri Apr 22 12:12:07 2005
From: Pierre_Rouleau at impathnetworks.com (Pierre Rouleau)
Date: Fri, 22 Apr 2005 12:12:07 -0400
Subject: Problem deriving a class from the built-in file  object
In-Reply-To: <d4b59q$js6$04$1@news.t-online.com>
References: <ay7ae.22073$Jg5.1129820@news20.bellglobal.com>
	<d4b59q$js6$04$1@news.t-online.com>
Message-ID: <pn9ae.9380$9G.715237@news20.bellglobal.com>

Peter Otten wrote:
> Pierre Rouleau wrote:
> 
> 
>>I'm trying to extend the functionality of the file object by creating a
>>class that derives from file.  MyFile class re-implements __init__(),
>>write(), writelines() and close() to augment the capabilities of file.
>>
>>All works fine, except for one thing:  'print >> myfile'  does not
>>execute Myfile.write(), it executes the file.write().   If I execute
>>myfile.write() explicitly, then Myfile.write() is called as expected.
> 
> 
> As a workaround, you can use delegation instead of inheritance:
> 
> 

Good idea, thanks!

>>Is it the expected behavior?
> 
> 
> I certainly didn't expect it either when I saw it for the first time.
> 
> Peter
> 

Is it something that will (or should) be changed in future version of 
Python?  I can't see any reason to keep the current behaviour.

Pierre


From megahrtz at gte.net  Tue Apr 12 12:36:00 2005
From: megahrtz at gte.net (Alex Nordhus)
Date: Tue, 12 Apr 2005 11:36:00 -0500
Subject: Please Hlp with msg:
 "The C++ part of the StaticText object has been deleted"
Message-ID: <000001c53f7d$b5d31a60$6400a8c0@grondor>



Alex Nordhus
Simple Solutions
Network/Internet Administrator
megahrtz at gte.net



From eurleif at ecritters.biz  Fri Apr  8 11:45:29 2005
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 08 Apr 2005 15:45:29 GMT
Subject: How to name Exceptions that aren't Errors
In-Reply-To: <mailman.1502.1112902903.1799.python-list@python.org>
References: <3blfl8F6gt80jU1@individual.net>
	<mailman.1502.1112902903.1799.python-list@python.org>
Message-ID: <tGx5e.441$5I5.30633@newshog.newsread.com>

Steve Holden wrote:
> I've even used an exception called Continue to overcome an irksome
> restriction in the language (you used not to be able to continue a
> loop from an except clause).

Out of curiosity, how could you use an exception to do that? I would 
think you would need to catch it and then use "continue", which wouldn't 
be possible because of the restriction you were trying to work around in 
the first place.


From pinard at iro.umontreal.ca  Thu Apr  7 12:03:42 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Thu, 7 Apr 2005 12:03:42 -0400
Subject: Lambda: the Ultimate Design Flaw
In-Reply-To: <d33ij3$9jj$1@panix2.panix.com>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<mailman.1222.1112417820.1799.python-list@python.org>
	<d2vhi8$k29$1@panix1.panix.com>
	<mailman.1429.1112794393.1799.python-list@python.org>
	<d33ij3$9jj$1@panix2.panix.com>
Message-ID: <20050407160342.GA16831@phenix.progiciels-bpi.ca>

[Aahz]

> I'll agree that Python currently has many examples of more than one
> way to do things (and even Python 3.0 won't remove every example
> [...]). But I won't agree that Only One Way has been abandoned as a
> design principle.

To summarize, instead of saying "Python has only one way to do it",
rather say "Python will eventually have only one way to do it", and with
such a wording, nobody will not be mislead.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From miki.tebeka at zoran.com  Thu Apr 21 07:07:19 2005
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: Thu, 21 Apr 2005 14:07:19 +0300
Subject: python LEX
In-Reply-To: <d47mli$d1v$1@bagan.srce.hr>
References: <d47mli$d1v$1@bagan.srce.hr>
Message-ID: <20050421110719.GJ2384@zoran.com>

Hello jozo,

> I have to work on python lexical definition in Lex. I spent lots of my
> time to find regular expresions written for Lex of Python language but
> nothing.
> Can somebody help me?
http://www.antlr.org/grammar/list (search for Python)

You can search in projects like Pyrex and Parrot for their parser
implementation.

HTH.
--
------------------------------------------------------------------------
Miki Tebeka <miki.tebeka at zoran.com>
http://tebeka.bizhat.com
The only difference between children and adults is the price of the toys
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From steve at holdenweb.com  Wed Apr 13 22:14:10 2005
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 13 Apr 2005 22:14:10 -0400
Subject: Compute pi to base 12 using Python?
In-Reply-To: <r3gr51di7jad7f129jcdgori0cc8nc03do@4ax.com>
References: <mailman.1821.1113383175.1799.python-list@python.org>	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>	<roy-D9732C.08282913042005@reader1.panix.com>	<425d3b01$1@nntp0.pdx.net>
	<d3jg22$hvn$1@panix2.panix.com>
	<r3gr51di7jad7f129jcdgori0cc8nc03do@4ax.com>
Message-ID: <d3kjem$pk6$3@sea.gmane.org>

Dan wrote:
> On 13 Apr 2005 12:06:26 -0400, roy at panix.com (Roy Smith) wrote:
> 
> 
>>Scott David Daniels  <Scott.Daniels at Acm.Org> wrote:
>>
>>>If you think those are fun, try base (1j - 1)
>>
>>Get real.  I can't imagine using anything so complex.
> 
> 
> Well said.  :-)
> 
Oh, no, now we're sunk

three-holes-in-the-ground-ly y'rs  - steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From WLigtenberg at gmail.com  Sat Apr 23 09:20:01 2005
From: WLigtenberg at gmail.com (Willem Ligtenberg)
Date: Sat, 23 Apr 2005 15:20:01 +0200
Subject: XML file parsing with SAX
Message-ID: <pan.2005.04.23.13.19.59.910355@gmail.com>

I decided to use SAX to parse my xml file.
But the parser crashes on:
  File "/usr/lib/python2.3/site-packages/_xmlplus/sax/handler.py", line 38, in fatalError
    raise exception
xml.sax._exceptions.SAXParseException: NCBI_Entrezgene.dtd:8:0: error in processing external entity reference

This is caused by:
<!DOCTYPE Entrezgene-Set PUBLIC "-//NCBI//NCBI Entrezgene/EN"
"NCBI_Entrezgene.dtd">

If I remove it, it parses normally.
I've created my parser like this:
import sys
from xml.sax import make_parser
from handler import EntrezGeneHandler

fopen = open("mouse2.xml", "r")
ch = EntrezGeneHandler()
saxparser = make_parser()
saxparser.setContentHandler(ch)
saxparser.parse(fopen)

And the handler is:
from xml.sax import ContentHandler

class EntrezGeneHandler(ContentHandler):
	"""
	A handler to deal with EntrezGene in XML
	"""
	
	def startElement(self, name, attrs):
		print "Start element:", name

So it doesn't do much yet. And still it crashes...
How can I tell the parser not to look at the DOCTYPE declaration.
On a website:
http://www.devarticles.com/c/a/XML/Parsing-XML-with-SAX-and-Python/1/
it states that the SAX parsers are not validating, so this error shouldn't
even occur?

Cheers,

Willem


From vze4rx4y at verizon.net  Sun Apr  3 07:24:50 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Sun, 03 Apr 2005 11:24:50 GMT
Subject: unittest vs py.test?
References: <roy-428D85.21040831032005@reader1.panix.com>
	<114pqf31isr8k4d@news.supernews.com>
	<roy-FBA61C.08212501042005@reader1.panix.com>
	<1112372685.034751.99410@o13g2000cwo.googlegroups.com>
	<L2k3e.23850$w63.1398227@news20.bellglobal.com>
	<1I2dnUmAu5ZPSdDfRVn-rA@powergate.ca> <%Fl3e.1804$7b.990@trndny01>
	<_4-dnaRR8dv8dNDfRVn-tg@powergate.ca> <WKt3e.1908$7b.429@trndny01>
	<6I-dnbpiIZJNJNPfRVn-hA@powergate.ca>
Message-ID: <6oQ3e.10378$db.6219@trndny07>

[Peter Hansen]
> (I'm not dissing py.test, and intend to check it
> out.

Not to be disrepectful, but objections raised by someone
who hasn't worked with both tools equate to hot air.


> I'm just objecting to claims that unittest
> somehow is "heavy", when those claiming that it
> is seem to think you have to use TestSuites and
> TestRunner objects directly... I think they've
> overlooked the relatively lightweight approach
> that has worked so well for me for four years...)

Claiming?  Overlooked?  You do know that I wrote the
example in unittest docs, the tutorial example, and hundreds
of the test cases in the standard library. It is not an
uninformed opinion that the exposed object model for
unittest is more complex.

As for "heaviness", it is similar to comparing alkaline AA
batteries to lithium AA batteries.  The first isn't especially heavy,
but it does weigh twice as much as the latter.  It only becomes a
big deal when you have to carry a dozen battery packs on a hiking
trip.  My guess is that until you've written a full test suite with
py.test, you won't get it.  There is a distinct weight difference between
the packages -- that was their whole point in writing a new testing tool
when we already had two.

When writing a large suite, you quick come to appreciate being able
to use assert statements with regular comparision operators, debugging
with normal print statements, and not writing self.assertEqual over and
over again.  The generative tests are especially nice.

Until you've exercised both packages, you haven't helped the OP
whose original request was:  "Is there anybody out there who has
used both packages and can give a comparative review?"


Raymond




From sarir.khamsi at raytheon.com  Fri Apr  8 14:29:17 2005
From: sarir.khamsi at raytheon.com (Sarir Khamsi)
Date: Fri, 08 Apr 2005 11:29:17 -0700
Subject: sending signals to child process
Message-ID: <u1x9ldsw2.fsf@raytheon.com>

I would like to start a child process (like w/ popen3(), or some such)
and then be able to interrupt it by sending it a control-c. How do I
do that in Python? Is there a better way to gracefully halt a child
process? Is there a more cross-platform way to start a child process
(popen() is only on UNIX/Win32)? Thanks.

Sarir


From dwyoon at purunSPAMinfo.co.kr  Mon Apr 11 05:24:31 2005
From: dwyoon at purunSPAMinfo.co.kr (Daewon YOON)
Date: Mon, 11 Apr 2005 18:24:31 +0900
Subject: unicode character '\N{ }'
Message-ID: <d3df9u$nml$1@news.kreonet.re.kr>

I learned from http://www.jorendorff.com/articles/unicode/python.html that
one can specify a unicode character by u'\N {name of the character}'.

Is there any method that I do the reverse of this process? For example,
when
I have a unicode character '?', uc.method() should return the character name
'POUND SIGN' in str format.

--
zooy


From gsakkis at rutgers.edu  Mon Apr 25 06:32:38 2005
From: gsakkis at rutgers.edu (George Sakkis)
Date: 25 Apr 2005 03:32:38 -0700
Subject: Injecting code into a function
Message-ID: <1114425158.092697.99030@o13g2000cwo.googlegroups.com>

Is there a general way of injecting code into a function, typically
before and/or after the existing code ? I know that for most purposes,
an OO solution, such as the template pattern, is a cleaner way to get
the same effect, but it's not always applicable (e.g. if you have no
control over the design and you are given a function to start with). In
particular, I want to get access to the function's locals() just before
it exits, i.e. something like:

def analyzeLocals(func):
    func_locals = {}
    def probeFunc():
        # insert func's code here
        sys._getframe(1).f_locals["func_locals"].update(locals())
    probeFunc()
    # func_locals now contains func's locals

So, how can I add func's code in probeFunc so that the injected code
(the update line here) is always called before the function exits ?
That is, don't just inject it lexically in the end of the function if
there are more than one exit points. I guess a solution will involve a
good deal bytecode hacking, on which i know very little; if there's a
link to a (relatively) simple HOWTO, it would be very useful.

Thanks,
George



From codecraig at gmail.com  Fri Apr 15 11:42:00 2005
From: codecraig at gmail.com (codecraig)
Date: 15 Apr 2005 08:42:00 -0700
Subject: Get OS name
In-Reply-To: <mailman.1976.1113578487.1799.python-list@python.org>
References: <1113572595.889597.206690@g14g2000cwa.googlegroups.com>
	<1113574033.787739.318840@o13g2000cwo.googlegroups.com>
	<mailman.1976.1113578487.1799.python-list@python.org>
Message-ID: <1113579720.273453.32480@g14g2000cwa.googlegroups.com>

my requirements for getting the OS info havent changed.  My first
message says "How can I get the OS Name, such as "Windows XP Pro"."
....that's what I wanted all along.

thanks for the information anyway, i believe platform is better than my
previous approach.

thanks



From gomoSINSPAM at datafull.com  Sun Apr 10 18:07:23 2005
From: gomoSINSPAM at datafull.com (=?iso-8859-1?q?Gonzalo_Sainz-Tr=E1paga_=28GomoX=29?=)
Date: Sun, 10 Apr 2005 19:07:23 -0300
Subject: Dictonary persistance weirdness
Message-ID: <pan.2005.04.10.22.07.17.604742@datafull.com>

Hi, I've posted this to mod_python at modpython.org and got no answers, so
i'm reposting it here, I really hope someone can help me out.

------

Hi,
I'm building my first application with mod_python. I am using Ian
Bicking's SQLObject, validators and HTMLfill among other tools.
I built a custom handler that parses the url and loads an external
module, passing it a request object and eventually, an ID integer that
is extracted from the URI.

Example:
http://site.com/race.py/4/signup will trigger "import race;
race.signup(4,req)" and that function will provide a form in order for
people to sign themselves up for race 4.

Form handling and data parsing (for POST or GET data) is done in
separate modules that are imported when needed, so race.py actually
imports formgen.py and formgen.py imports VarsWrapper (from wrappers.py)
in order to parse data for his form and tell whether he needs to print
an error message, or the input is valid.

The process works fine up to races.py: it gets the POSTed data fine, but
then if I try to pass the variables received to the form handler, the
handler will only receive them correctly on the first call to it after a
server restart. For later calls, the form handler sticks to the values
received on his first request.

Code snippets:

-- race.py -------------------------
def signup(id,req):
    from formgen import FormInscripcion

    v = VarsWrapper(req)
    c = v.get_vars()

    f = FormInscripcion(id)
    
    tpl.locals.contenido = f.handle(c)
    return tpl.get_html()


-- formgen.py -------------------------

class FormInscripcion:
(...)
    def handle(self,vars):
        # check for sent data
        if ('id_regata',str(self.id_regata)) in vars.items():
            return self._post(vars) # triggers a data handler
        else: 
            return self._form() # shows the clean form
(...)


-- wrappers.py -------------------------
class VarsWrapper:
    def __init__(self,req):
        self.fs = util.FieldStorage(req)

    def get_vars():
        d = {}
        for each in self.fs.list:
            self.d[x.name] = x.value
        return d


So again, the problem arises when calling FormInscripcion.handle() for
the 2nd time or more: it will stick to the data received on the 1st
request passed to it. If i print the variable dictionary (c in race.py,
vars in formgen.py) after the form, c will change with new POST data, as
vars will stay constant after the 1st request.
The weird thing is that i'm passing data from pyhandler.py to race.py in
the same way that i'm passing it from race.py to formgen.py, and it
refuses to work correctly in the latter.
I have already tried pretty much every single possible cause for this
oddity with no consistent results, so i'm pretty confident that there's
something i'm missing that's not inherent to my app's logic, but to my
app's login combined with some mod_python specific complication.
In short: i'm going nuts!
Sorry for all the writing, but I really hope somebody can help me.
Thanks in advance,

Gonzalo Sainz-Tr?paga (GomoX)


From tjreedy at udel.edu  Tue Apr 19 15:37:07 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 19 Apr 2005 15:37:07 -0400
Subject: Twisted for online games
References: <1113851977.195434.78980@l41g2000cwc.googlegroups.com><cdvoeca3m0a.fsf@kielo.uta.fi>
	<d43m2u$ggv$1@sea.gmane.org>
Message-ID: <d43md7$hgn$1@sea.gmane.org>


"Terry Reedy" <tjreedy at udel.edu> wrote in message 
news:d43m2u$ggv$1 at sea.gmane.org...
> There is also an active, focused pygame mailing list (also accessible via 
> gmane).  I believe some posters there have mentioned using twisted.

In fact there is a current thread 'Threads' on pygame, twisted, and 
threads.

tjr





From rkern at ucsd.edu  Thu Apr 21 17:45:27 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 21 Apr 2005 14:45:27 -0700
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <7xekd3dgbt.fsf@ruckus.brouhaha.com>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>	<_Lm9e.23143$Xm3.17864@trndny01>	<mailman.2173.1114002239.1799.python-list@python.org>	<1114003997.778676.144950@z14g2000cwz.googlegroups.com>	<mailman.2211.1114078086.1799.python-list@python.org>	<slrnd6f17h.ge8.apardon@rcpc42.vub.ac.be>	<1114109221.149346.64850@z14g2000cwz.googlegroups.com>
	<7xekd3dgbt.fsf@ruckus.brouhaha.com>
Message-ID: <d496l6$1gi$1@sea.gmane.org>

Paul Rubin wrote:
> "Dan Bishop" <danb_83 at yahoo.com> writes:
> 
>>Name a problem space that inherently requires arrays to be 1-based
>>rather than 0-based.
> 
> 
> "inherently" is too strong a word, since after all, we could do all
> our computing with Turing machines.
> 
> Some algorithms are specified in terms of 1-based arrays.  And most
> Fortran programs are written in terms of 1-based arrays.  So if you
> want to implement a 1-based specification in Python, or write Python
> code that interoperates with Fortran code, you either need 1-based
> arrays in Python or else you need messy conversions all over your
> Python code.

I write Python code that interoperates with Fortran code all the time 
(and write Fortran code that interoperates with Python code, too). Very, 
very rarely do I have to explicitly do any conversions. They only show 
up when a Fortran subroutine requires an index in its argument list.

In Fortran, I do Fortran. In Python, I do Python.

Yes, there is some effort required when translating some code or 
pseudo-code that uses 1-based indexing. Having done this a number of 
times, I haven't found it to be much of a burden.

> The book "Numerical Recipes in C" contains a lot of numerical
> subroutines written in C, loosely based on Fortran counterparts from
> the original Numerical Recipes book.  The C routines are full of messy
> conversions from 0-based to 1-based.  Ugh.

I contend that if they had decided to just write the C versions as C 
instead of C-wishing-it-were-Fortran, they would have made a much better 
library. Still sucky, but that's another story.

> Again, this (along with nested scopes and various other things) was
> all figured out by the Algol-60 designers almost 50 years ago.  In
> Algol-60 you could just say "integer x(3..20)" and get a 3-based array
> (I may have the syntax slightly wrong by now).  It was useful and took
> care of this problem.

There's nothing that stops you from writing a class that does this. I 
believe someone posted such a one to this thread.

I have yet to see a concrete proposal on how to make lists operate like 
this.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From dmbkiwi at yahoo.com  Tue Apr 26 06:17:01 2005
From: dmbkiwi at yahoo.com (Dumbkiwi)
Date: Tue, 26 Apr 2005 22:17:01 +1200
Subject: kdialog and unicode
References: <pan.2005.04.26.09.21.55.862042@yahoo.com>
	<d4l2al$iif$01$2@news.t-online.com>
Message-ID: <pan.2005.04.26.10.16.56.488032@yahoo.com>

On Tue, 26 Apr 2005 11:41:01 +0200, Peter Otten wrote:

> Dumbkiwi wrote:
> 
>> I'm trying to get python, unicode and kdialog to play nicely together.
>> This is a linux machine, and kdialog is a way to generate dialog boxes
>> in kde with which users can interact (for example input text), and you
>> can use the outputted text in your script.
>> 
>> Anyway, what I'm doing is reading from a utf-8 encoded text file using
>> the codecs module, and using the following:
>> 
>> data = codecs.open('file', 'r', 'utf-8')
> 
> data is now a unicode string.
> 
> 
>> I then manipulate the data to break it down into text snippets.
>> 
>> Then I run this command:
>> 
>>>>> test = os.popen('kdialog --inputbox %s' %(data))
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\u017a' in
>> position 272: ordinal not in range(128)
>> 
>> I would really like kdialog display the text as utf-8.  However, it
>> seems that python is trying to pass the utf-8 encoded data as ascii,
>> which obviously fails because it can't deal with the utf-8 encoded text.
>>  Is it possible to pass the text out to kdialog as utf-8, rather than
>> ascii?
> 
> Just encode the data in the target encoding before passing it to
> os.popen():
> 
> test = os.popen('kdialog --inputbox %s' % data.encode("utf-8"))
> 
> Peter

I had tried that, but then the text looks like crap.  The text I'm using
for this is Polish, and there are a lot of non-English characters in
there. Using this method results in some strange characters - basically it
looks like a file encoded in utf-8, but displayed using iso-8859-1.

Is this the best I can do?

Thanks for your help.

Matt


From mefjr75 at hotmail.com  Wed Apr 13 12:34:54 2005
From: mefjr75 at hotmail.com (M.E.Farmer)
Date: 13 Apr 2005 09:34:54 -0700
Subject: whitespace , comment stripper, and EOL converter
References: <2ab23d7a.0504120857.14ef094a@posting.google.com>
	<mailman.1784.1113330278.1799.python-list@python.org>
	<2ab23d7a.0504130738.622a3605@posting.google.com>
Message-ID: <1113410094.102181.315080@l41g2000cwc.googlegroups.com>

qwweeeit wrote:
> Thanks! If you answer to my posts one more time I could  consider you
as
> my tutor...
>
> It was strange to have found a bug...! In any case I will not go
deeper
> into the matter, because for me it's enough your explanatiom.
> I corrected the problem by hand removing the tokens spanning multiple
lines
> (there were only 8 cases...).
>
> Instead I haven't understood your hint about comments...
> I succeded  in realizing a python script which removes comments.
>
> Here it is (in all its cumbersome and criptic appearence!...):
>
> # removeCommentsTok.py
> import tokenize
> Input = "pippo1"
> Output = "pippo2"
> f = open(Input)
> fOut=open(Output,"w")
>
> nLastLine=0
> for i in tokenize.generate_tokens(f.readline):
> .   if i[0]==52 and nLastLine != (i[2])[0]:
> .   .   fOut.write((i[4].replace(i[1],'')).rstrip()+'\n')
> .   .   nLastLine=(i[2])[0]
> .   elif i[0]==4 and nLastLine != (i[2])[0]:
> .   .   fOut.write((i[4]))
> .   .   nLastLine=(i[2])[0]
> f.close()
> fOut.close()
>
> Some explanations for the guys like me...:
> - 52 and 4 are the arbitrary codes for comments and NEWLINE
respectively
> - the comment removing is obtained by clearing the comment (i[1]) in
the
>   input line (i[4])
> - I also right trimmed the line to get rid off the remaining blanks.
Tokenizer sends multiline strings and comments as a single token.

######################################################################
# python comment and whitespace stripper :)
######################################################################

import keyword, os, sys, traceback
import StringIO
import token, tokenize
__credits__ = 'just another tool that I needed'
__version__ = '.7'
__author__ = 'M.E.Farmer'
__date__ =  'Jan 15 2005, Oct 24 2004'

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

class Stripper:
    """python comment and whitespace stripper :)
    """
    def __init__(self, raw):
        self.raw = raw

    def format(self, out=sys.stdout, comments=0, spaces=1,
                untabify=1, eol='unix'):
        ''' strip comments, strip extra whitespace,
            convert EOL's from Python code.
        '''
        # Store line offsets in self.lines
        self.lines = [0, 0]
        pos = 0
        # Strips the first blank line if 1
        self.lasttoken = 1
        self.temp = StringIO.StringIO()
        self.spaces = spaces
        self.comments = comments

        if untabify:
           self.raw = self.raw.expandtabs()
        self.raw = self.raw.rstrip()+' '
        self.out = out

        self.raw = self.raw.replace('\r\n', '\n')
        self.raw = self.raw.replace('\r', '\n')
        self.lineend = '\n'

        # Gather lines
        while 1:
            pos = self.raw.find(self.lineend, pos) + 1
            if not pos: break
            self.lines.append(pos)

        self.lines.append(len(self.raw))
        # Wrap text in a filelike object
        self.pos = 0

        text = StringIO.StringIO(self.raw)

        # Parse the source.
        ## Tokenize calls the __call__
        ## function for each token till done.
        try:
            tokenize.tokenize(text.readline, self)
        except tokenize.TokenError, ex:
            traceback.print_exc()

        # Ok now we write it to a file
        # but we also need to clean the whitespace
        # between the lines and at the ends.
        self.temp.seek(0)

        # Mac CR
        if eol == 'mac':
           self.lineend = '\r'
        # Windows CR LF
        elif eol == 'win':
           self.lineend = '\r\n'
        # Unix LF
        else:
           self.lineend = '\n'

        for line in self.temp.readlines():
            if spaces == -1:
                self.out.write(line.rstrip()+self.lineend)
            else:
                if not line.isspace():
                    self.lasttoken=0
                    self.out.write(line.rstrip()+self.lineend)
                else:
                    self.lasttoken+=1
                    if self.lasttoken<=self.spaces and self.spaces:
                        self.out.write(self.lineend)


    def __call__(self, toktype, toktext,
            (srow,scol), (erow,ecol), line):
        ''' Token handler.
        '''
        # calculate new positions
        oldpos = self.pos
        newpos = self.lines[srow] + scol
        self.pos = newpos + len(toktext)

        #kill the comments
        if not self.comments:
            # Kill the comments ?
            if toktype == tokenize.COMMENT:
                return

        # handle newlines
        if toktype in [token.NEWLINE, tokenize.NL]:
            self.temp.write(self.lineend)
            return

        # send the original whitespace, if needed
        if newpos > oldpos:
            self.temp.write(self.raw[oldpos:newpos])

        # skip indenting tokens
        if toktype in [token.INDENT, token.DEDENT]:
            self.pos = newpos
            return

       # send text to the temp file
        self.temp.write(toktext)
        return
######################################################################

def Main():
    import sys
    if sys.argv[1]:
        filein = open(sys.argv[1]).read()
        Stripper(filein).format(out=sys.stdout, comments=1, untabify=1,
eol='win')

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

if __name__ == '__main__':
    Main()

M.E.Farmer



From ivoras at _-_fer.hr  Sun Apr 24 09:24:22 2005
From: ivoras at _-_fer.hr (Ivan Voras)
Date: Sun, 24 Apr 2005 15:24:22 +0200
Subject: Unicode problems, yet again
In-Reply-To: <1jvm619o04aa9qv36f6a91636pugb7b1ob@4ax.com>
References: <mailman.2362.1114309342.1799.python-list@python.org>
	<d4foo1$vnr$1@bagan.srce.hr>
	<1jvm619o04aa9qv36f6a91636pugb7b1ob@4ax.com>
Message-ID: <d4g6mn$8lq$1@bagan.srce.hr>

John Machin wrote:

> Just a thought: I noticed from the traceback that you are running this
> on a Windows box. Profound apologies in advance if this question is an
> insult to your intelligence, but you do know that Windows code page
> 1250 (Latin 2) -- which I guess is the code page that you would be
> using -- is *NOT* the same as iso-8859-2, don't you?

Yes, I know. The reason I'm doing it on Windows is that the app's 
supposed to be multiplatform, so I'm doing part of development on 
Windows, part on FreeBSD... The agreed-upon codepage is iso8859-2 for 
both. (about the "latin2" term - it really sucks that it's used 
incosistently - for example, PostgreSQL (and I think MySQL) use "latin2" 
when they mean iso8859-2).

> need to deal with Unicode, then set up the encoding explicitly on a
> per-file or per-socket basis. The default ASCII encoding is then there

I didn't know that!

... looks at the manual ... oh, it was introduced in 2.3. I wonder if it 
would work for sockets (though I don't plan to use it now - I've got 
explicit encodings/decodings set up).


From duncan.booth at invalid.invalid  Mon Apr  4 03:31:21 2005
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 4 Apr 2005 07:31:21 GMT
Subject: string goes away
References: <mailman.1156.1112322721.1799.python-list@python.org>
	<Xns962B5D9DAB99Eduncanrcpcouk@127.0.0.1>
	<87d5tcouct.fsf@pobox.com>
Message-ID: <Xns962E5392D62FCduncanrcpcouk@127.0.0.1>

John J. Lee wrote:

> Duncan Booth <duncan.booth at invalid.invalid> writes:
> [...]
>>    str.join(sep, list_of_str)
> [...]
> 
> Doesn't work with unicode, IIRC.
> 
> 
str.join won't work if sep is unicode, but generally you know what type the 
separator is and str.join will quite happily join a list of strings where 
one or more is unicode and return a unicode result.

If you know the separator is unicode then use unicode.join instead.


From notexpletivedeleteduk at notyahoo.co.uk  Wed Apr 13 17:43:32 2005
From: notexpletivedeleteduk at notyahoo.co.uk (Pseud O'Nym)
Date: Wed, 13 Apr 2005 22:43:32 +0100
Subject: Newbie Tkinter Question
Message-ID: <425d9284$0$572$ed2e19e4@ptn-nntp-reader04.plus.net>

Hi,

the following fragment doesn't cause any errors and results in buttons the
correct size for the images, but the buttons don't work, and the images
aren't displayed. If I add a text property, and remove the images, they work
fine, so the rest of my code's OK. I've searched this group and Python.org
to no avail.

class App:
  def __init__(self, master):
    frame = Frame(master)
    frame.pack(side=LEFT, fill=Y)
    image1 = PhotoImage(file='button_a.gif')
    self.button = Button(frame, image=image1)
    self.button.pack(side=TOP)

Can anyone enlighten me?




From Scott.Daniels at Acm.Org  Fri Apr  8 13:02:40 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Fri, 08 Apr 2005 10:02:40 -0700
Subject: Can dictionary values access their keys?
In-Reply-To: <d3682h$qom$1@vegh.ks.cc.utah.edu>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>
Message-ID: <4256b3d3$1@nntp0.pdx.net>

Matthew Thorley wrote:
> This may be a very rudimentary question, but here goes:
 From your questions, I believe you are not thinking of values as
being distinct from the names and data structures that refer to them.

What is the parent of 23 in the following expression?

     1 + 11 * 2

If you know that, what is the parent of 293 in the same expression?

> If I have a simple dictionary, where the value is a class or function,
> is there an interface through which it can discover what its key is?
> Similar to index() for list.

     def keyfor(dictionary, element):
         for key, value in dictionary.iteritems():
             if value == element:  # value is element if identity quest
                 return key
         raise ValueError, element

> On a similar note, if one object is part of another, 
This is the idea you have wrong.  In C, C++, Java, and Fortran you
might have objects part of other objects, but in Python objects refer
to each other.

How about this:

     class Holder(object): pass

     v = [1 + 11 * 2]
     w = [1, v, 3]
     d = {1: v}
     o = Holder()
     o.x = v

What is the parent of v?

Or even worse:

     v = [1]
     v[0] = v

What is the parent of v now?

--Scott David Daniels
Scott.Daniels at Acm.Org


From matthew_shomphe at countrywide.com  Mon Apr 18 12:54:49 2005
From: matthew_shomphe at countrywide.com (Matt)
Date: 18 Apr 2005 09:54:49 -0700
Subject: fpectl
In-Reply-To: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
References: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
Message-ID: <1113843289.303006.186530@l41g2000cwc.googlegroups.com>


S?bastien Boisg?rault wrote:
> Hi all,
>
> Can anybody tell me why I can't load the fpectl module in my Python
> interpreter:
>
> >>> import fpectl
> Traceback: ...
> ...
> ImportError: No module named fpectl
>
> My platform is Linux (Mandrake 10.x) + Python2.4, built from the
> (python.org) sources and configured with the --with-fpectl option.
>
> Any idea ? Is the Python Library Reference obsolete on this point or
> did I miss something ?
>
> I have understood from the previous posts on the subject that the
whole
> floating-point issue (or specifically IEEE 754 support) is quite
> complex
> and highly platform-dependent. Therefore I guess that I cannot take
for
> granted the expected behavior of fpectl functions. But at least I
> should
> be able to import it, shouldn't I ?
>
> Cheers,
>
> S.B.

I'd assume it's because you're on a non-Unix system.  The docs
(http://www.python.org/doc/2.3.5/lib/module-fpectl.html) say:
Availability: Unix

I'm assuming that means you can't use it on a Windows platform (or any
non-Unix environment)...



From peter at engcorp.com  Wed Apr 27 14:15:37 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 27 Apr 2005 14:15:37 -0400
Subject: List comprehension and FieldStorage
In-Reply-To: <1114624635.234561.96390@o13g2000cwo.googlegroups.com>
References: <1114552736.288675.248070@g14g2000cwa.googlegroups.com>
	<1114624635.234561.96390@o13g2000cwo.googlegroups.com>
Message-ID: <b8OdnahH79AuS_LfRVn-jQ@powergate.ca>

Derek Basch wrote:
> bump

If "bump" is supposed to be some kind of nudge to get people to reply, 
please have more patience.  You posted only sometime late yesterday, and 
many people take up to a few days to receive the posts from this 
newsgroup, and even those who don't shouldn't be expected to reply the 
same instant they read your question.  Also, it's quite possible you 
won't get any reply (though this is pretty rare) in which case "bump" is 
going to be seen as nothing more than rudeness, given that if an answer 
was forthcoming it would probably already have been posted.  In such a 
case, you're better off rereading your request and considering whether 
you phrased it adequately or can supply additional information to help 
potential responders.

(In this case, your question looks fairly clear, though it doesn't look 
like you've spent much time at the interactive prompt experimenting and 
trying to find an answer on your own.)

-Peter


From python-url at phaseit.net  Mon Apr  4 12:17:36 2005
From: python-url at phaseit.net (Simon Brunning)
Date: Mon, 04 Apr 2005 16:17:36 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr  4)
Message-ID: <mailman.1306.1112633692.1799.python-announce-list@python.org>

QOTW: "Paraphrasing Occam,  I would say 'don't multiply base classes
without necessity'. ;)" - Michele Simionato

"The world diversifies, the world congeals." - Raymond Hettinger (commenting
on the fact that py.test happily runs unittest test suites)

"I can think of no better reason for a programmer to regularly learn
languages: 'our tools warp our thinking.'  A programmer is a
professionally warped thinker." - Scott David Daniels


    Highlight of the week; Python 2.4.1 final is out:
        http://groups-beta.google.com/group/comp.lang.python.announce/msg/b82afbc729226433

    The effbot was once asked how to find an object's name:  "The same
    way as you get the name of that cat you found on your porch:  the
    cat (object) itself cannot tell you its name, and it doesn't really
    care -- so the only way to find out what it's called is to ask all
    your neighbours (namespaces) if it's their cat (object) ... and
    don't be surprised if you'll find that it's known by many names, or
    no name at all!" Duncan Booth shows us how to ask the neighbours:
        http://groups-beta.google.com/group/comp.lang.python/msg/237dc92f3629dd9a

    Ian Bicking and David Hansson talk marketing:
        http://blog.ianbicking.org/why-web-programming-matters-most.html
	http://www.loudthinking.com/arc/000432.html
    Incidentally, when will a hero(ine) emerge to do for GUI
    toolkits what the PyWebOff has started for Web frameworks?
     
    A couple of nice decorator examples this week:  Scott David Daniels
    suggests that a decorator might tidy up wxPython event handlers, and
    Oren Tirosh shows us how to hide globals from a function:
        http://groups-beta.google.com/group/comp.lang.python/msg/338134f3bd7c439c
        http://groups-beta.google.com/group/comp.lang.python/msg/d34e97cc2ae284d6
    
    Guido demonstrates multimethods, and Ian Bicking gives us an alternative
    implementation using generic functions:
        http://www.artima.com/weblogs/viewpost.jsp?thread=101605
        http://blog.ianbicking.org/more-on-multimethods.html
    
    Is Python supposed to be boring?
        http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/ccf712755b3af3f4/437f80709adcbd86?rnum=1#ba7ad3fb3f503426
        
    Evan Jones shows us How to Use UTF-8 with Python:
        http://evanjones.ca/python-utf8.html


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Brett Cannon continues the marvelous tradition established by 
    Andrew Kuchling and Michael Hudson of intelligently summarizing
    action on the python-dev mailing list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    The Python Business Forum "further[s] the interests of companies
    that base their business on ... Python."
	http://www.python-in-business.org

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topics/pythonurl/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.




From james at wrong.nu  Tue Apr 12 09:25:03 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Tue, 12 Apr 2005 13:25:03 +0000
Subject: Python license (2.3)
In-Reply-To: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <200504121425.08563.james@wrong.nu>

On Tuesday 12 April 2005 09:51, Antoon Pardon wrote:
> It seems I have to include the following in
> my code:
>
>   "Copyright (c) 2001, 2002 Python Software Foundation;
>    All Rights Reserved"
>
> Do I understand correctly?

You are of course allowed to *add* your own copyright statement:

"Copyright (c) 2001, 2002 Python Software Foundation;
All Rights Reserved
Copyright (c) 2005 Antoon Pardon;
All Rights Reserved"
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From corey.coughlin at comcast.net  Wed Apr 13 15:36:34 2005
From: corey.coughlin at comcast.net (corey.coughlin at comcast.net)
Date: 13 Apr 2005 12:36:34 -0700
Subject: build flow? SCons? AAP? process creation?
Message-ID: <1113420994.118316.245190@g14g2000cwa.googlegroups.com>

Hey guys, here's a little question.  I'm looking for something like a
build system, where I can set up a bunch of jobs with dependencies, and
have them run in parallel.  Ideally, I'd like a system where jobs can
be run in parallel, all the stdout and stderr for each job is kept in a
database of some kind, jobs can be anything that can be run at a
command line, and a failing job won't cause the whole run to fail.
I've been looking into some of the standard stuff (GNU make) and some
of the more pythonic stuff like SCons and AAP.  SCons seems to do
parallel execution, which is nice, but I can't figure out from the docs
if it's possible to keep stdout and stderr somewhere.  AAP seems to
have a nice interface, but it doesn't do parallel.

So if I do wind up having to write this thing myself, I've been
checking the docs on process creation, and have a couple questions if
anyone can fill me in.  It looks like the os.spawn* commands can start
nonblocking sub-processes, but there doesn't seem to be a way to get
stdout and stderr.  On the other hand, the popen commands make it easy
to trap stdout and stderr, but I guess I'd have to do the thread setup
and spawning myself.  Is there another alternative that I'm missing
here?  

Thanks!



From tom at cs.otago.ac.nz  Sun Apr  3 22:12:42 2005
From: tom at cs.otago.ac.nz (Tom Eastman)
Date: Mon, 04 Apr 2005 14:12:42 +1200
Subject: Silly question re: 'for i in sys.stdin'?
Message-ID: <d2q7ni$h3t$1@sea.gmane.org>

I'm not new to Python, but I didn't realise that sys.stdin could be called
as an iterator, very cool!

However, when I use the following idiom:

   for line in sys.stdin:
       doSomethingWith(line)

and then type stuff into the program interactively, nothing actually happens
until I hit CTRL-D.  I expected that 'doSomethingWith(line)' would execute
after every line I input into the program, just like what used to happen
with:

   while True:
      line = sys.stdin.readline()
      if line == '': break
      doSomethingWith(line)

What is the difference?

Thanks for your help!

      Tom





From roy at panix.com  Wed Apr 13 08:28:29 2005
From: roy at panix.com (Roy Smith)
Date: Wed, 13 Apr 2005 08:28:29 -0400
Subject: Compute pi to base 12 using Python?
References: <mailman.1821.1113383175.1799.python-list@python.org>
	<1113390479.738210.49530@z14g2000cwz.googlegroups.com>
Message-ID: <roy-D9732C.08282913042005@reader1.panix.com>

In article <1113390479.738210.49530 at z14g2000cwz.googlegroups.com>,
 "Dan Bishop" <danb_83 at yahoo.com> wrote:

> But there's no reason other than tradition why you should arrange them
> into groups of 10.

Well, it is traditional for people to have 10 fingers :-)

Other fun things to think about are negative bases.  For example, 3(10) = 
111(-2).  That's 1*(-2)^2  + 1*(-2)^1 + 1*(-2)^0 = 4 - 2 + 1.  I can't 
think of any use for negative bases, but they are a fun game to play with 
(if you're into that sort of stuff).

Non-integer bases are fun too.


From possibilitybox at gmail.com  Fri Apr 29 21:10:51 2005
From: possibilitybox at gmail.com (possibilitybox)
Date: 29 Apr 2005 18:10:51 -0700
Subject: large dictionary creation takes a LOT of time.
In-Reply-To: <7xy8b2nk34.fsf@ruckus.brouhaha.com>
References: <1114757468.367583.210840@z14g2000cwz.googlegroups.com>
	<7xy8b2nk34.fsf@ruckus.brouhaha.com>
Message-ID: <1114823451.023918.152330@o13g2000cwo.googlegroups.com>

oh, right, i did only one eighth to check and see if it was scaling
near linearly, as i couldn't even run profiling without python dying.

i have 400mb ram and 2ghz processor, on freebsd, so it shouldn't be
performance.  i'll try your suggestions and see how it works.



From pyguy2 at gmail.com  Wed Apr 20 10:06:02 2005
From: pyguy2 at gmail.com (pyguy2 at gmail.com)
Date: 20 Apr 2005 07:06:02 -0700
Subject: How to run Python in Windows w/o popping a DOS box?
In-Reply-To: <7x1x960x81.fsf@ruckus.brouhaha.com>
References: <7xekd66ra3.fsf@ruckus.brouhaha.com>
	<4265d7b4.27743873@news.oz.net>
	<7x1x960x81.fsf@ruckus.brouhaha.com>
Message-ID: <1114005961.973871.282100@l41g2000cwc.googlegroups.com>

Python.exe starts up a windows console which gives you things stdin,
stderr, and stdout  from the C runtime.

Be warned that you do not have those things with the consoleless(?)
pythonw.exe, stuff which MS intends for gui applications.

It reminds me of select() on windows only working halfway (just
w/sockets) because of the history of how all this got added to windows.
A lot of half-way stuff.

john



From nick at craig-wood.com  Wed Apr 20 13:30:02 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 20 Apr 2005 17:30:02 GMT
Subject: Faster os.walk()
References: <1114011606.600970.43300@l41g2000cwc.googlegroups.com>
Message-ID: <slrnd6d2if.o2g.nick@irishsea.home.craig-wood.com>

fuzzylollipop <jarrod.roberson at gmail.com> wrote:
>  I am trying to get the number of bytes used by files in a directory.
>  I am using a large directory ( lots of stuff checked out of multiple
>  large cvs repositories ) and there is lots of wasted time doing
>  multiple os.stat() on dirs and files from different methods.

I presume you are saying that the os.walk() has to stat() each file to
see whether it is a directory or not, and that you are stat()-ing each
file to count its bytes?

If you want to just get away with the one stat() you'll have to
re-implement os.walk yourself.

Another trick for speeding up lots of stats is to chdir() to the
directory you are processing, and then just use the leafnames in
stat().  The OS then doesn't have to spend ages parsing lots of paths.

However even if you implement both the above, I don't reckon you'll
see a lot of improvement given that decent OSes have a very good cache
for stat results, and that parsing file names is very quick too,
compared to python.

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


From antonyliu2002 at yahoo.com  Tue Apr 19 23:17:06 2005
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Tue, 19 Apr 2005 20:17:06 -0700 (PDT)
Subject: Importing some functions from a py file
In-Reply-To: 6667
Message-ID: <20050420031706.99829.qmail@web54504.mail.yahoo.com>

The choice is (b):

(b) you do have "def main()" as per my example, but
you have an unguarded "main()" at the top level

Below is exactly what I have:

def func1():
    do_sth_1()

def func2():
    do_sth_2()

def main():
    do sth_m()
#end of code1.py

So, you suggest that if I add to the end of code1.py
module the following,

if __name__ == "__main__":
    main()

I should be OK, right?





--- John Machin <sjmachin at lexicon.net> wrote:
> On Tue, 19 Apr 2005 19:13:13 -0700 (PDT), Anthony
> Liu
> <antonyliu2002 at yahoo.com> wrote:
> >I think I got confused by the python import
> facility.
> >Say, in code1.py I have func1, func2, func3 and
> main.
> >In code2.py, I *only* want to use func2 from
> code1.py.
> >So, I did
> >
> >from code1 import func2
> >
> >But every time, I run code2.py, the main() of
> code1.py
> >is run.
> >
> >I don't know why.  Any hint please?  Thanks.
> 
> *All* of code1.py is executed when you import all or
> parts of it.
> 
> code1.py should look something like this:
> ===
> import some, modules, maybe
> 
> def func1():
>     do_sth_1()
> 
> def func2():
>     do_sth_2()
> 
> def main():
>     do sth_m()
> 
> if __name__ == "__main__":
>     main()
> === 
> 
> The import, the defs, and the "if" and anything else
> you have at the
> top level are statements that are executed.
> 
> If you run code1.py as a script, the if test passes,
> and main() is
> invoked. Otherwise (you import all or bits of the
> code1 module), the
> if test fails, and main() is not invoked.
> 
> Possibilities: (a) In your real code1.py, you don't
> actually have "def
> main()", you have do_sth_m() at the top level, and
> it is being
> executed unconditionally (b) you do have "def
> main()" as per my
> example, but you have an unguarded "main()" at the
> top level (c)
> something that we can't guess -- you may have to
> post a more detailed 
> description (cut-down version of the actual code
> would be a good
> idea!).
> 
> HTH,
> John
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


		
__________________________________ 
Do you Yahoo!? 
Plan great trips with Yahoo! Travel: Now over 17,000 guides!
http://travel.yahoo.com/p-travelguide


From jfj at freemail.gr  Mon Apr 25 05:59:34 2005
From: jfj at freemail.gr (jfj)
Date: Mon, 25 Apr 2005 12:59:34 +0300
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <mailman.2437.1114424277.1799.python-list@python.org>
References: <86ll77pgqz.fsf@guru.mired.org>	<mailman.2430.1114408769.1799.python-list@python.org>	<426CB5DC.1050301@freemail.gr>
	<mailman.2437.1114424277.1799.python-list@python.org>
Message-ID: <426CBF86.4040407@freemail.gr>

Robert Kern wrote:

> jfj wrote:
>> 2) to convert a list/tuple/string to a list, which is
>> done extremely fast.
> 
> 
> Add "any iteratable". Genexps are iterables.
> 

The thing is that when you want to convert a tuple to a list
you know already the size of it and you can avoid using append()
and expanding the list gradually.  For iterables you can't avoid
appending items until StopIteration so using list() doesn't have
any advantage.  The OP was about genexps vs list comprehensions
but this is about list() vs. list comprehensions.

> Possibly. I find them too similar with little enough to choose between them, hence the OP's question. 

One solution is to forget about list().  If you want a list use []. 
Unless you want to convert a tuple...

I think a better question would be "What do *generator expressions* do
that list comprehensions don't?".  And always use list comprehensions
unless you want the extra bit.


jfj



From auch-ich-m at g-kein-spam.com  Tue Apr  5 12:16:51 2005
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Tue, 05 Apr 2005 18:16:51 +0200
Subject: regexp weirdness (bug?)
References: <1112715308.737856.234580@z14g2000cwz.googlegroups.com>
Message-ID: <2584344.b1EHUGjtUV@news.perlig.de>

* Sergey Schetinin wrote:

> Here's the session log:
> 
>>>> _re_pair="(?(plus).|-)"
>>>> _re1=("(?P<plus>\+)"+_re_pair)
>>>> _re2=("((?P<plus>\+))"+_re_pair)
>>>> _re3=("(?:(?P<plus>\+))"+_re_pair)
>>>> _re4="(%s)"%_re3
>>>> import re
>>>> print [re.match(_re, "+a") and 'match' for _re in [_re1, _re2,
> _re3, _re4]]
> ['match', None, 'match', None]
> 
> this is not the supposed behaivour. all theese patterns should match,
> right?

No, I suppose they shouldn't compile.
_re_pair should be (?P=plus).

nd



From steve at holdenweb.com  Tue Apr 12 21:22:00 2005
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 12 Apr 2005 21:22:00 -0400
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <d3hs17$gf$1@sea.gmane.org>

Xah Lee wrote:
[mountains of irrelevant drivel which normal people would boil down to 
"I don't understand the doicumentation]. Even then, I'd still be on the 
side of the documentation.

> The answer to the questions are resounding yeses, you fucking asses.
> 
> paypal me a hundred dollars and i'll rewrite the whole re doc in a few
> hours.
> 
I will personally pay you a hundred dollars if you can find enough time 
between now and this time next week - you should be able to find "a few 
hours" in 168 without unduly conveniencing yourself.

The condition for winning the prize is that at least five regular 
posters to c.l.py have to mail me and saythey think your version is better.

If no such document gets produced, we must assume you are too busy?

> Fuck you the standard IT morons. Excuse me for i didn't have time to
> write a more coherent and detailed analysis of the stupidities of the
> re doc.

I have learned not to expect coherent and detailed analysis, so I have 
managed to contain my disappointment.

non-standard-moronical-ly y'rs  - steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From franz.steinhaeusler at utanet.at  Fri Apr 29 04:16:38 2005
From: franz.steinhaeusler at utanet.at (Franz Steinhaeusler)
Date: Fri, 29 Apr 2005 10:16:38 +0200
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
	<1114612588.435456.296960@z14g2000cwz.googlegroups.com>
	<pd5171dmt0lfj8bu4qtji28dq6smeuhlq1@4ax.com>
	<1114706904.963329.244320@o13g2000cwo.googlegroups.com>
Message-ID: <i9r371hqn4d758b56k9os995e2i52rq7f7@4ax.com>

On 28 Apr 2005 09:48:25 -0700, "Matt" <matt.fryer at gmail.com> wrote:

>Sorry about that Frank. You have to create a project (New --> Project)
>and add your file to it then Run-->Run. This is a bug that slipped past
>because we do all of our development using projects and hadn't even
>tried the obvious: open file and run. That fix has made its way to the
>wx folks, but hasn't been released yet.

Hello Matt,

thanks for clarification ;)

-- 
Franz Steinh?usler
http://drpython.sourceforge.net/
http://mitglied.lycos.de/drpython/


From mwm at mired.org  Wed Apr 13 18:34:01 2005
From: mwm at mired.org (Mike Meyer)
Date: Wed, 13 Apr 2005 17:34:01 -0500
Subject: exporting imports to reduce exe size?
References: <c7nn519u84nj9a4p96srdp24vcq9p5v76h@4ax.com>
Message-ID: <86k6n6ux0m.fsf@guru.mired.org>

Ron_Adam <radam2_ at _tampabay.rr.com> writes:

> In looking at ways to reduce the size of exe's created with py2exe,
> I've noticed that it will include a whole library or module even if I
> only need one function or value from it.  
>
> What I would like to do is to import individual functions and then
> export 'write' them to a common resource file and import that with
> just the resources I need in them.

It's not clear you can use a common "resources" file. You need to copy
the namespaces represented by each module into separate namespaces in
the file you're going to import. Multiple files can do this, but there
may be another approach.

> Has anyone tried this?  
>
> I'm considering using pickle to do it, but was wondering if this is
> even a viable idea?  

Yeah, it's viable. LISP has been doing it for quite a while.

However, note that you have to figure out what objects in each module
are needed in each function you call from that module, and recursively
examine each of those objects. It's a non-trivial thing to do, and
will rely heavily on introspection of the objects in question.

     <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.


From lbolognini at gmail.com  Fri Apr 15 05:17:36 2005
From: lbolognini at gmail.com (Lorenzo Bolognini)
Date: Fri, 15 Apr 2005 10:17:36 +0100
Subject: Is Python appropriate for web applications?
In-Reply-To: <op.so85a1bgr3xrds@sony>
References: <op.so85a1bgr3xrds@sony>
Message-ID: <PEL7e.51555$Z14.40416@news.indigo.ie>

Unknown User wrote:

> I  have the choice.
> Thanks for your opinion,

If you have a look at CherryPy (www.cherrypy.org) you will not want to 
go back to PHP again! ;-)

Lorenzo




From SSchukat at dspace.de  Wed Apr 27 13:04:41 2005
From: SSchukat at dspace.de (Stefan Schukat)
Date: Wed, 27 Apr 2005 18:04:41 +0100
Subject: how to pass an array to a VB array via COM
Message-ID: <B4EFCCAD2646F6449166007B3EAA5EC31DA08E@exchange2003.dspace.de>



> -----Original Message-----
> From: python-list-bounces+sschukat=dspace.de at python.org
> [mailto:python-list-bounces+sschukat=dspace.de at python.org]On Behalf Of
> jelle
> Sent: Tuesday, April 26, 2005 12:31 PM
> To: python-list at python.org
> Subject: how to pass an array to a VB array via COM
> 
> 
> Hi,
> 
> I'm trying to script Rhino -the nurbs modeller, not the server soft-
> via COM.
> Which is good fun, except i cant seem to pass arrays to the program.
> I suppose its expecting VB arrays, and is not to keen when i send a
> tuple:
> 
> RS.AddCurve(((1,2,3),(4,5,6),(7,8,9)),3)
> ---
> Traceback (most recent call last):
>   File "<input> ", line 1, in ?
>   File "c:\Python23\lib\site-packages\jf\interface\RhinoScript.py",
> line 48,
> in AddCurve
>     return self._ApplyTypes_(77, 1, (12, 0), ((12, 0), (12, 16)),
> 'AddCurve', None,vaPoints, vaDegree)
>   File "c:\Python23\lib\site-packages\win32com\client\__init__.py",
> line
> 446, in _ApplyTypes_
>     return self._get_good_object_(
> com_error: (-2147352567, 'Exception occurred.', (6, 'RhinoScript_m',
> 'Type
> mismatch in parameter.  One-dimensional array required.', 'C:\\Program
> Files\\Rhinoceros 3.0\\RhinoScript_m.HLP', 393222, 0), None)
> ---
> 
> This is somewhat puzzling, since when i define points in the
> application, these are returned as a tuple of tuples:
> 
> 
> >>>s = RS.GetPoints()
> >>>print s
> ((-7.0, -30.0, 0.0), (15.0, -24.0, 0.0), (-7.0, 12.0, 0.0), (14.0,
> 29.0,
> 0.0), (28.0, 10.0, 0.0), (20.0, 1.0, 0.0))
> 
> I've been searching this list for a solution, but didnt find 
> anything i
> could use. Any ideas?
> 
> Cheers,
> 
> Jelle
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

The problem you see here is the automatic calculation of the dimension for 
SafeArrays in Pythoncom. The array shown above could be transported either as 
a 2-dim Array (3x3) or as a 1-dim array (1x3) with elements which are also 1-dim 
arrays. Since the automatic calculation always tries to find the highest dimensionality
the Rhino program will get a 2-Dim array which it does not support. 
In VB you can define the dimension of such a array in Python we must guess. 
I'm just working on a PySafeArray implementation for PythonCom which should 
give you also the opportunity to define the dimension via Python. Until then 
you have no luck. 

	Stefan


From reinhold-birkenfeld-nospam at wolke7.net  Thu Apr 21 06:04:06 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Thu, 21 Apr 2005 12:04:06 +0200
Subject: Why Python does *SLICING* the way it does??
In-Reply-To: <slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>
References: <1113976729.450677.261130@o13g2000cwo.googlegroups.com>
	<IOOdnYkJbJPB4PvfRVn-oA@powergate.ca>
	<d463fn$kd7$1@panix2.panix.com>
	<mailman.2204.1114033804.1799.python-list@python.org>
	<slrnd6em84.ge8.apardon@rcpc42.vub.ac.be>
Message-ID: <3cpc8oF6n6g9bU1@individual.net>

Antoon Pardon wrote:

> I sometimes think python should have been more explicite here,
> using a marker for the start-index and end-index, may '^' and
> '$'. So if you wanted the last element you had to write:
> 
>   lst[$]
> 
> And for the next to last element:
> 
>   lst[$ - 1]
> 
> 
> This would make accessing list elements counted from the rear
> almost just as easy as it is now but wouldn't interfere with
> the ask forgiveness programming style.

How would you pass this argument to __getitem__?
What would be allowed, only '$-x' or also '$+x' or what else?
What type would '$' be?

Reinhold


From andreis at stud.cs.uit.no  Fri Apr 15 07:05:27 2005
From: andreis at stud.cs.uit.no (=?ISO-8859-1?Q?Andr=E9_S=F8reng?=)
Date: Fri, 15 Apr 2005 13:05:27 +0200
Subject: RE Engine error with sub()
In-Reply-To: <425f85a2$1@news.uni-ulm.de>
References: <d3nhqk$dlo$1@domitilla.aioe.org> <425f85a2$1@news.uni-ulm.de>
Message-ID: <d3o75m$1rb7$1@news.uit.no>

The "Internal error in regular expression engine" occurs also
in Python 2.4.0 when creating a regular expression containing
more than 9999 or's ("|").

Dennis Benzinger wrote:
> Maurice LING schrieb:
> 
>> Hi,
>>
>> I have the following codes:
>>
>> from __future__ import nested_scopes
> 
>  > [...]
> 
> Are you still using Python 2.1?
> 
> In every later version you don't need the
> "from __future__ import nested_scopes" line.
> 
> So, if you are using Python 2.1 I strongly recommend
> upgrading to Python 2.4.1.
> 
>> [...]
>> It all works well for rule count up to 800+ but when my replacement 
>> rules swells up to 1800+, it gives me a runtime error that says 
>> "Internal error in regular expression engine"... traceable to "return 
>> self.regex.sub(self, text)" in substitute() method.
>> [...]
> 
> 
> I didn't read your code, but this sounds like you have a problem with 
> the regular expression engine being recursive in Python versions < 2.4.
> Try again using Python 2.4 or later (i.e. Python 2.4.1). The new regular 
> expression engine is not recursive anymore.
> 
> Bye,
> Dennis


From exarkun at divmod.com  Fri Apr 22 09:14:14 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Fri, 22 Apr 2005 13:14:14 GMT
Subject: SSL Server Socket Support in Python?
In-Reply-To: <d4ask9$2kjk$1@news.uit.no>
Message-ID: <20050422131414.10340.131187268.divmod.quotient.18268@ohm>

On Fri, 22 Apr 2005 14:59:59 +0200, Andr?? S??reng <andreis at stud.cs.uit.no> wrote:
>
>I'm trying to create a SSL-enabled server in Python, and in the doc for
>the socket module:
>
>ssl(sock[, keyfile, certfile])
>      Initiate a SSL connection over the socket sock. keyfile is the name of 
>a PEM formatted
>      file that contains your private key. certfile is a PEM formatted 
>certificate chain file.
>      On success, a new SSLObject is returned.
>
>So:
>
>listen_socket = socket.socket()
>listen_socket.bind((addr, port))
>listen_socket.listen(10)
>s, addr = listen_socket.accept()
>ssl_s = socket.ssl(s, "key.pem", "cert.pem")
>>socket.sslerror: (1, 'error:140770FC:SSL 
>>routines:SSL23_GET_SERVER_HELLO:unknown protocol')
>
>Am I missing something?

  Python's SSL support is client-side only.  For SSL servers, take a look at one of the third-party SSL libraries (M2Crypto, PyOpenSSL, TLSLite), or for an easier time, Twisted.

  Jp


From dan at dontspammecauseidontlikit.com  Thu Apr 14 03:03:57 2005
From: dan at dontspammecauseidontlikit.com (Dan)
Date: Thu, 14 Apr 2005 15:03:57 +0800
Subject: Inelegant
Message-ID: <2v3s51dg0f69mlduo7akt8i66s22qihfrn@4ax.com>


I've just begun playing with Python, and so far I like what I see.
It's a very elegant language.  But I've found something that's, well,
a bit ugly.  Maybe someone can point out to me where I'm wrong.

If you use triple quotes to define a string, then the newlines are
implicitly included.  This is a very nice feature.  But if you're
inside a function or statement, then you'll want the string to be
positioned along that indentation.  And the consequences of this is
that the string will include those indentations.

For example:

def SomeFunction()
   if SomeCondition:
      MyString = 
      """
      The quick brown fox
      """
      print MyString

The output will be:

      The quick brown fox

But what you really want is:

The quick brown fox

The way around it is to write the function thus:

def SomeFunction()
   if SomeCondition:
      MyString = 
"""
The quick brown fox
"""
      print MyString

But that's just ugly.  It seems to me that the string should be
interpreted with the edge along the indentation line, not from the
start of the line.  But that would probably create other problems.

Dan


From magoldfish at gmail.com  Fri Apr 15 10:50:04 2005
From: magoldfish at gmail.com (Marcus Goldfish)
Date: Fri, 15 Apr 2005 10:50:04 -0400
Subject: Using python from a browser
In-Reply-To: <MPG.1cc9988eccb9eaf7989689@news-server>
References: <mailman.1928.1113506375.1799.python-list@python.org>
	<MPG.1cc9988eccb9eaf7989689@news-server>
Message-ID: <5e183f3d050415075017e4737f@mail.gmail.com>

> > I read that IE had the capability to embedd Python scripts, but what
> > about the others ?
> 
>   While Python can be set up as a scripting language for IE, this is
> normally disabled as it could be a security hole. The open call is
> available from Python scripts so a web site could read or destroy your
> files.

Slightly off-topic, it is possible to use browser helper objects
(bhos) with Internet Explorer:

http://starship.python.net/crew/theller/moin.cgi/CtypesLinks

Marcus


From trentm at ActiveState.com  Tue Apr 26 12:00:44 2005
From: trentm at ActiveState.com (Trent Mick)
Date: Tue, 26 Apr 2005 09:00:44 -0700
Subject: create python process
In-Reply-To: <1114504590.890211.75430@f14g2000cwb.googlegroups.com>
References: <1114493653.057561.96260@o13g2000cwo.googlegroups.com>
	<86mzrmm0p0.fsf@guru.mired.org>
	<1114504590.890211.75430@f14g2000cwb.googlegroups.com>
Message-ID: <20050426160043.GB30122@ActiveState.com>

[ajikoe at gmail.com wrote]
> I use windows and os.fork is not working in windows.
> Can we create process inside python I mean I have function and I want
> to run it as a process not a thread ?
> 
> Should I run code from os. in order to run  a processes?

Check out any or all of:

   subprocess (new module in Python 2.4)
   os.system
   os.popen, os.popen2, os.popen3, os.popen4

Note that you can't just run a Python *function* in a separate process
directly. You'll have to have some way to call:
    python.exe your_script.py
such that your function gets called.

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From Joseph.Karalius at seminis.com  Thu Apr 14 13:58:17 2005
From: Joseph.Karalius at seminis.com (Karalius, Joseph)
Date: Thu, 14 Apr 2005 10:58:17 -0700
Subject: Python 2.3.5  make: *** [Parser/pgen] Error 1 Parser/grammar.o: I
	n function `translabel':  undefined reference to `__ctype_b'
Message-ID: <AC7FAA24FC9BB642ACCECD97253F20FD0A93FD37@oxnexch01.seminis.com>

Can anyone explain what is happening here?  I haven't found any useful info
on Google yet.
Thanks in advance.

mmagnet:/home/jkaralius/src/zopeplone/Python-2.3.5 # make
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Modules/python.o
Modules/python.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/acceler.o
Parser/acceler.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/grammar1.o
Parser/grammar1.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/listnode.o
Parser/listnode.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/node.o
Parser/node.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/parser.o
Parser/parser.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/parsetok.o
Parser/parsetok.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/bitset.o
Parser/bitset.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/metagrammar.o
Parser/metagrammar.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/firstsets.o
Parser/firstsets.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/grammar.o
Parser/grammar.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/pgen.o
Parser/pgen.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/myreadline.o
Parser/myreadline.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/tokenizer.o
Parser/tokenizer.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/abstract.o
Objects/abstract.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/boolobject.o
Objects/boolobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/bufferobject.o Objects/bufferobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/cellobject.o
Objects/cellobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/classobject.o Objects/classobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/cobject.o
Objects/cobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/complexobject.o Objects/complexobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/descrobject.o Objects/descrobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/enumobject.o
Objects/enumobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/fileobject.o
Objects/fileobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/floatobject.o Objects/floatobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/frameobject.o Objects/frameobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/funcobject.o
Objects/funcobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/intobject.o
Objects/intobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/iterobject.o
Objects/iterobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/listobject.o
Objects/listobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/longobject.o
Objects/longobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/dictobject.o
Objects/dictobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/methodobject.o Objects/methodobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/moduleobject.o Objects/moduleobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/object.o
Objects/object.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/obmalloc.o
Objects/obmalloc.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/rangeobject.o Objects/rangeobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/sliceobject.o Objects/sliceobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/stringobject.o Objects/stringobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/structseq.o
Objects/structseq.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/tupleobject.o Objects/tupleobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Objects/typeobject.o
Objects/typeobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/weakrefobject.o Objects/weakrefobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/unicodeobject.o Objects/unicodeobject.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Objects/unicodectype.o Objects/unicodectype.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Python/bltinmodule.o
Python/bltinmodule.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Python/exceptions.o
Python/exceptions.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Python/ceval.o
Python/ceval.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Python/mysnprintf.o
Python/mysnprintf.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Parser/tokenizer_pgen.o Parser/tokenizer_pgen.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o
Parser/printgrammar.o Parser/printgrammar.c
gcc -pthread -c -fno-strict-aliasing -DNDEBUG -g -O3 -Wall
-Wstrict-prototypes -I. -I./Include  -DPy_BUILD_CORE -o Parser/pgenmain.o
Parser/pgenmain.c
gcc -pthread -DNDEBUG -g -O3 -Wall -Wstrict-prototypes   Parser/acceler.o
Parser/grammar1.o Parser/listnode.o Parser/node.o Parser/parser.o
Parser/parsetok.o Parser/bitset.o Parser/metagrammar.o Parser/firstsets.o
Parser/grammar.o Parser/pgen.o Objects/obmalloc.o Python/mysnprintf.o
Parser/tokenizer_pgen.o Parser/printgrammar.o Parser/pgenmain.o -lpthread
-ldl  -lutil -o Parser/pgen
Parser/grammar.o: In function `translabel':
itimerspec/Parser/grammar.c:183: undefined reference to `__ctype_b'
Parser/tokenizer_pgen.o: In function `tok_get':
itimerspec/Parser/tokenizer.c:1150: undefined reference to `__ctype_b'
itimerspec/Parser/tokenizer.c:1262: undefined reference to `__ctype_b'
itimerspec/Parser/tokenizer.c:1280: undefined reference to `__ctype_b'
itimerspec/Parser/tokenizer.c:1287: undefined reference to `__ctype_b'
Parser/tokenizer_pgen.o:itimerspec/Parser/tokenizer.c:1272: more undefined
references to `__ctype_b' follow
collect2: ld returned 1 exit status
make: *** [Parser/pgen] Error 1
mmagnet:/home/jkaralius/src/Python-2.3.5 #

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Joseph Karalius
Research Associate - Bioinformatics
Molecular Markers and Applied Genomics
Seminis Vegetable Seeds, Inc
37437 State Highway 16
Woodland, CA 95695-9353
530-669-6131
joseph.karalius (a) seminis dot com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



From kasimov at i.com.ua  Wed Apr 20 11:47:37 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 18:47:37 +0300
Subject: goto statement
In-Reply-To: <70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>	<mailman.2164.1113998230.1799.python-list@python.org>	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
Message-ID: <d45to7$g02$1@news.tsystems.kiev.ua>


by the way, "goto" statement will be useful for writing more powerful obfuscators

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From Scott.Daniels at Acm.Org  Tue Apr 19 13:01:13 2005
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Tue, 19 Apr 2005 10:01:13 -0700
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Apr 18)
In-Reply-To: <mailman.2106.1113921228.1799.python-announce-list@python.org>
References: <mailman.2106.1113921228.1799.python-announce-list@python.org>
Message-ID: <42653959.8040705@Acm.Org>

Simon Brunning wrote:
> "Get real.  I can't imagine using anything so complex." -- Scott David
> Daniels, in response to a suggestion to try (1j-1) as a counting base

Oops -- once again I get credit for someone's response to my post. (I 
was the "try (1j-1)" poster).

--Scott David Daniels
Scott.Daniels at Acm.Org


From kasimov at i.com.ua  Wed Apr 20 07:58:35 2005
From: kasimov at i.com.ua (Maxim Kasimov)
Date: Wed, 20 Apr 2005 14:58:35 +0300
Subject: goto statement
In-Reply-To: <mailman.2164.1113998230.1799.python-list@python.org>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>	<mailman.2159.1113989175.1799.python-list@python.org>	<d45cun$ec3$1@news.tsystems.kiev.ua>	<mailman.2162.1113995666.1799.python-list@python.org>	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
Message-ID: <d45gap$elj$1@news.tsystems.kiev.ua>

Robert Kern wrote:
> Maxim Kasimov wrote:
> 
>> Simon Brunning wrote:
>>
>>> On 4/20/05, Maxim Kasimov <kasimov at i.com.ua> wrote:
>>>
>>>> it would be quite useful for debuging porposes
>>>
>>>
>>>
>>>
>>> How does goto help you to remove bugs?
>>>
>>> I can certainly see how it helps you put them in in the first place...
>>>
>>
>> if you need to comment a couple of code (and then uncomment ), what 
>> are you doing then?
> 
> 
> Use comments?
> 

WOW, just greate! ... but i'd like to relax at some more interesting way than to comment each of rows

-- 
Best regards,
Maxim Kasimov
mailto: kasimov at i.com.ua


From chernyshevsky at hotmail.com  Tue Apr 12 22:29:06 2005
From: chernyshevsky at hotmail.com (Chung Leong)
Date: Tue, 12 Apr 2005 22:29:06 -0400
Subject: Web Application Client Module
References: <1113340287.265724.137300@f14g2000cwb.googlegroups.com>
Message-ID: <9LGdnTRlLP76GcHfRVn-qA@comcast.com>


"Raffi" <thegrizzzly at yahoo.com> wrote in message
news:1113340287.265724.137300 at f14g2000cwb.googlegroups.com...
> Hi All,
>
> I hope I'm posting this question to the correct newsgroups. We have a
> web based database application that's accessed using IE. The
> application opens a popup window to run in. With all the popup blockers
> and compromised browsers out there, I'm looking into developing a web
> based custom client side application to access the application with.
> The application will be developed to only reach the web application
> site using the https protocol. It also needs to javascript enabled. It
> will be downloaded from the main web site and used to access the
> database application.
>
> Any suggestions/ideas on how to go about developing the client
> application? What tools tools are out there for such a project.

It's easy. Just create an application that hosts the MSHTML ActiveX control
(IE itself minus the interface). With tools like Delphi or Visual Basic,
it's literally a matter of dragging and dropping the control into the form.
Even in Visual C++ it's not that hard.

Forcing Javascript to be on is somewhat more tricky. There are a couple COM
interfaces that you to implement.

I suggest you google "MSHTML hosting" for more info. The newsgroup
microsoft.public.inetsdk.programming.mshtml_hosting is also an excellent
resource.




From ivanlan at pauahtun.org  Mon Apr 18 00:06:04 2005
From: ivanlan at pauahtun.org (Ivan Van Laningham)
Date: Sun, 17 Apr 2005 22:06:04 -0600
Subject: Slight discrepancy with filecmp.cmp
Message-ID: <4263322C.3DB6D001@pauahtun.org>

Hi All--
I noticed recently that a few of the jpgs from my digital cameras have
developed bitrot.  Not a real problem, because the cameras are CD
Mavicas, and I can simply copy the original from the cd.  Except for the
fact that I've got nearly 25,000 images to check.  So I wrote a set of
programs to both index the disk versions with the cd versions, and to
compare, using filecmp.cmp(), the cd and disk version.  Works fine. 
Turned up several dozen files that had been inadvertantly rotated or
saved with the wrong quality, various fat-fingered mistakes like that.

However, it didn't flag the files that I know have bitrot.  I seem to
remember that diff uses a checksum algorithm on binary files, not a
byte-by-byte comparison.  Am I wrong?  If I am, what then is the source
of the problem in my jpg images where it looks like a bit or two has
been shifted or added; suddenly, there's a line going through the
picture above which it's normal, and below it either the color has
changed (usually to pinkish) or the remaining raster lines are all
shifted either right or left?

Any ideas?

Metta,
Ivan
----------------------------------------------
Ivan Van Laningham
God N Locomotive Works
http://www.andi-holmes.com/
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours


From eldiener_no_spam_here at earthlink.net  Sat Apr  2 21:42:12 2005
From: eldiener_no_spam_here at earthlink.net (Edward Diener)
Date: Sun, 03 Apr 2005 02:42:12 GMT
Subject: Name of IDLE on Linux
References: <mailman.1242.1112466945.1799.python-list@python.org>
	<V7D3e.2366$44.1509@newsread1.news.atl.earthlink.net>
	<8764z4nbv5.fsf@thomas.local>
Message-ID: <8KI3e.2623$44.1361@newsread1.news.atl.earthlink.net>

Thomas Rast wrote:
> Edward Diener <eldiener_no_spam_here at earthlink.net> writes:
>
>> It is a pity the Python Linux binary installations do not
>> create folders on the desktop or in the Gnome menu system with links
>> to the Python to the documentation and a readme telling me what
>> executables were installed.
>
> Imagine they did, and the other 1392 packages (on my system) too :-)

I can understand that <g>. But I would rather have links somewhere than not
know what it was a particular package does and how to use it. As a relative
Linux newbie, I have found it disconcerting to have things installed on my
system when I first booted the system or when I install new packages or
upgrade existing ones, and not know what these packages are used for. One
can always delete links, and they are cheap, so I would rather have too much
to begin with than too little.

>
> Documentation usually resides in /usr/share/doc/<package>,
> /usr/share/doc/packages/<package> or similiar.  You're on an RPM-based
> system, so
>
> $ rpm -ql <package>
>
> lists all files belonging to that package.  You should have little
> trouble spotting the documentation files there.

Thanks. That does help.




From notmyprivateemail at gmail.com  Mon Apr  4 09:08:33 2005
From: notmyprivateemail at gmail.com (Alex Polite)
Date: Mon, 4 Apr 2005 15:08:33 +0200
Subject: boolean -> DNF
Message-ID: <ad97512905040406083068108c@mail.gmail.com>

I need to transform boolean expressions to Disjunctive Normal Form.

Right now I'm using  BoolStuff[1], a small C program to this end.

I'd like to skip BoolStuff and do it all in python but I have no idea
where to start. Anyone out there with a PhD in computer science that
can give me a starting point?

alex


[1] http://www3.sympatico.ca/sarrazip/dev/boolstuff.html


-- 
Alex Polite
http://flosspick.org


From tom at dtsam.com  Fri Apr 22 16:40:01 2005
From: tom at dtsam.com (Thomas Bartkus)
Date: Fri, 22 Apr 2005 15:40:01 -0500
Subject: gui developing
References: <mailman.2295.1114191326.1799.python-list@python.org><1114191709.671893.254560@o13g2000cwo.googlegroups.com>
	<mailman.2297.1114193668.1799.python-list@python.org>
Message-ID: <vv-dnWH7q64g_fTfRVn-ow@telcove.net>


"Jaime Wyant" <programmer.py at gmail.com> wrote in message
news:mailman.2297.1114193668.1799.python-list at python.org...
Python Card wraps around wxPython.

<snip>
Be warned though, that some people question the
"cross-platformability" of wxPython.  I've been doing GUI stuff
exclusively for windows, so I can't really speak to this.

I'm sure there are gotchas I haven't stumbled into yet
    BUT
wxPython "cross-platformability" Linux/Gnome<->Windows is amazing!

Thomas Bartkus




From jaehokim1 at yahoo.com  Fri Apr 29 11:00:01 2005
From: jaehokim1 at yahoo.com (Jaeho Kim)
Date: Fri, 29 Apr 2005 15:00:01 -0000
Subject: Need some help to understand Python program..
Message-ID: <d4ti5h+lsmp@eGroups.com>

Hi,,,

I am very interested about the following Python program, but I am
very beginner on Python.. I do not understand this algorithm,,

I would appreciated if you give me this algorithm to some other
popular programming language.


filename="Karp.py"




from __future__ import nested_scopes

import bisect

class _Num:
    def __init__(self, value, index):
        self.value = value
        self.i = index

    def __lt__(self, other):
        return self.value < other.value

# This implements the Karmarkar-Karp heuristic for partitioning a set
# in two, i.e. into two disjoint subsets s.t. their sums are
# approximately equal.  It produces only one result, in O(N*log N)
# time.  A remarkable property is that it loves large sets:  in
# general, the more numbers you feed it, the better it does.

class Partition:
    def __init__(self, nums):
        self.nums = nums
        sorted = [_Num(nums[i], i) for i in range(len(nums))]
        sorted.sort()
        self.sorted = sorted

    def run(self):
        sorted = self.sorted[:]
        N = len(sorted)
        connections = [[] for i in range(N)]

        while len(sorted) > 1:
            bigger  = sorted.pop()
            smaller = sorted.pop()

            # Force these into different sets, by "drawing a
            # line" connecting them.
            i, j = bigger.i, smaller.i
            connections[i].append(j)
            connections[j].append(i)

            diff = bigger.value - smaller.value
            assert diff >= 0
            bisect.insort(sorted, _Num(diff, i))

        # Now sorted contains only 1 element x, and x.value is
        # the difference between the subsets' sums.

        # Theorem:  The connections matrix represents a spanning tree
        # on the set of index nodes, and any tree can be 2-colored.
        # 2-color this one (with "colors" 0 and 1).

        index2color = [None] * N

        def color(i, c):
            if index2color[i] is not None:
                assert index2color[i] == c
                return
            index2color[i] = c
            for j in connections[i]:
                color(j, 1-c)

        color(0, 0)

        # Partition the indices by their colors.
        subsets = [[], []]
        for i in range(N):
            subsets[index2color[i]].append(i)

        return subsets

N = 50
import math
x = [math.sqrt(i) for i in range(1, N+1)]
p = Partition(x)
s, t = p.run()
sum1 = 0L
sum2 = 0L
for i in s:
    sum1 += x[i]
for i in t:
    sum2 += x[i]
print "Set 1 sum", repr(sum1)
print "Set 2 sum", repr(sum2)
print "difference", repr(abs(sum1 - sum2))


Thanks for you help...






From sizer at nospam.com  Tue Apr 12 17:38:05 2005
From: sizer at nospam.com (Sizer)
Date: 12 Apr 2005 16:38:05 -0500
Subject: Looking for a very specific type of embedded GUI kit
Message-ID: <Xns963695069E82Esizernospamcom@216.40.28.87>

We make embedded devices that are basically wimpy linux boxes with small 
custom display/touchscreen heads on them. They're not running X or any 
other windowing system. All development is done with C++ and PEG 
(Portable Embedded GUI) driving the display. PEG lets you install your 
own hardware driver to talk any custom hardware, which is what we've 
done.

Currently we have an upgrade/installer application that boots from CD, 
reads an XML manifest, does what it takes to reformat the drive, 
partition it, install the correct packages, etc. etc. All the while 
displaying on the little screen what it's doing so there's some obvious 
progress going on. 

Doing this kind of thing in C++ is very painful, so I've suggested that 
perhaps the installer could be done in Python - at which point we have 
the issue of which non-X graphics toolkit we can use. If this works out, 
we'd probably like to replace other C++ tools with Python as well.

So the question is: what non-X gui toolkit can we use that has Python 
bindings and will let us use a custom display driver at the lowest level?  
Qt/Embedded looks nice, but I don't see anything about Python binding 
(though as I write this I've found PyQt). I've also looked at nano-x and 
picogui from doing google searches on the newsgroup. Can wxPython run 
without X? I don't think so, but could be wrong. Should we just write our 
own python wrapper for PEG? I'm still researching, but figured I'd ask 
here in case anyone had any relevant experience and could point me 
somewhere.


From peter at engcorp.com  Wed Apr 27 00:57:19 2005
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 27 Apr 2005 00:57:19 -0400
Subject: schedule a monthly ftp event
In-Reply-To: <pan.2005.04.27.01.36.42.976974@jerf.org>
References: <1114553735.360210.290000@f14g2000cwb.googlegroups.com>
	<pan.2005.04.27.01.36.42.976974@jerf.org>
Message-ID: <Mvydnaqc3JAChvLfRVn-uw@powergate.ca>

Jeremy Bowers wrote:
> ... On UNIX, use some "cron" varient, Windows has
> some sort of Scheduler built in but I've never done anything with it but
> turn it off

Modern Windowsen also have the "AT" command line program which is 
sometimes a much more appropriate way to get at that capability than the 
"Scheduler" GUI approach.  Haven't had occasion to use either yet, myself...


From mothra at nowhereatall.com  Thu Apr 14 13:30:11 2005
From: mothra at nowhereatall.com (Mothra)
Date: Thu, 14 Apr 2005 10:30:11 -0700
Subject: Converting a perl module to a python module would it be worthit?
References: <425e7c41$1@usenet.ugs.com><425e8494$0$10741$626a14ce@news.free.fr>
	<mailman.1908.1113491570.1799.python-list@python.org>
Message-ID: <425ea78e$1@usenet.ugs.com>


"Ivan Van Laningham" <ivanlan at pauahtun.org> wrote in message
news:mailman.1908.1113491570.1799.python-list at python.org...
> Hi All--
>
> bruno modulix wrote:
> >
> > Mothra wrote:
> > > Hi All,
> > >
> > > I am the current author of the Astro-Sunrise perl module
> > > http://search.cpan.org/~rkhill/Astro-Sunrise-0.91/Sunrise.pm
> > > and was wondering if it would be worth while to convert it to python.
> >
> > Only you and your module's users may tell...
> >
>
> I'd use it.

I guess I spoke to soon
http://kortis.to/radix/python/code/Sun.py

This was from the same source I used to create ny module.

>
> > > First off, I have never programmed in python. I would like to use
> > > this project to learn python.
> >
> > Well, this might be an answer to your first question !-)
> >
>
> If you can get your mind off the @#)*&^@#!!&-ing Perl syntax, you'll be
> fine;-)
>
> > > Another question is, if I do this where can I put the results?
> > > As far as I know python has no "CPAN".
> > http://www.python.org/pypi/
> >
>
> They're working on the Python version of CPAN, but it's taking a long
> time.  I think they started in 1998 or so?  Haven't kept up, so I have
> no idea what's taking so long.  I'm sure someone more knowledgeable than
> me will come along and set us straight.
>
I checked out the above link (thanks!!)  I need to look deeper
at the docs for creating a "module"

Thanks all for the responses!!

Mothra




From tim.leeuwvander at nl.unisys.com  Mon Apr 18 13:44:15 2005
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 18 Apr 2005 10:44:15 -0700
Subject: Removing dictionary-keys not in a set?
In-Reply-To: <slrnd67r9l.fc3.klaus@main.szn.dk>
References: <1113824946.525441.285760@l41g2000cwc.googlegroups.com>
	<slrnd67r9l.fc3.klaus@main.szn.dk>
Message-ID: <1113846254.998059.278430@z14g2000cwz.googlegroups.com>

Hi Klaus,

I think I like the looks of your version the best, so far. Readable and
clear, to me.

cheers and thanks,

--Tim



From eric_brunel at despammed.com  Thu Apr 28 04:36:18 2005
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 28 Apr 2005 10:36:18 +0200
Subject: tkinter text width
References: <mailman.2550.1114560111.1799.python-list@python.org>
	<mailman.2593.1114624338.1799.python-list@python.org>
	<pan.2005.04.27.19.10.51.37432@jerf.org>
	<mailman.2598.1114631546.1799.python-list@python.org>
Message-ID: <opspxoust6rqur0o@eb.pragmadev>

On Wed, 27 Apr 2005 12:52:21 -0700, James Stroud <jstroud at mbi.ucla.edu> wrote:

[snip]
> How might I query the size of a fixed-width font in pixles? It appears that
> the width of the font in points does not correlate with its width in pixels
> based on some simple expriments I have done.

This is the case on all platforms, but far more sensible on Windows: Windows attempts to be "clever" and corrects the font size you give depending on your screen resolution so that a 12 point font is supposed to be actually 12/72 inches *on screen* (obviously ignoring the fact that this is almost never what you want, since all other dimensions are in screen points by default...). Other platforms than Windows are supposed to do this too, but (fortunately) it seems to fail and the computed factor is very close to 1 (I got something like 1.04 on Linux, whatever the screen resolution was).

To avoid this, you can try to use the winfo_* methods to get the screen resolution (I thought there was a more straightforward way, but the only way I see is to do someWidget.winfo_screenwidth() / someWidget.winfo_screenmmwidth(), with the usual adjustement to get inches instead of millimeters). You can then use this adjustement on all the dimensions you compute so that it will be consistent with the font sizes you get.

The other solution is to turn the adjustement off. You can do this at tk level with the command "tk scaling 1". Unfortunately, this command does not seem to be directly available at Tkinter level, so you'll have to do:
someWidget.tk.call('tk', 'scaling', 1)
After doing that, all your font sizes should be in screen points. But be aware that *all* your fonts will seem to shrink (the screen resolutions these days are usually closer to 92 dpi than to 72...). So you may have to do some adjustements on other parts of your application (the biggest problem I got was with menu items).

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17;8(%,5.Z65\\'*9--56l7+-'])"


From jjl at pobox.com  Wed Apr  6 14:23:21 2005
From: jjl at pobox.com (John J. Lee)
Date: 06 Apr 2005 19:23:21 +0100
Subject: A ClientForm Question
References: <1112351784.512279.198080@z14g2000cwz.googlegroups.com>
	<pan.2005.04.03.12.41.05.4355@f0x.it> <87d5ta6w7v.fsf@pobox.com>
	<1112773578.561333.166300@l41g2000cwc.googlegroups.com>
Message-ID: <8y3vlq7a.fsf@pobox.com>

"narke" <steven at lczmsoft.com> writes:

> John J. Lee wrote,
> 
> > See second bullet point under "Why does .click()ing on a button not
> work for me?".
> 
> Thanks for you advice. However, after read through the FAQs, I have not
> managed to find a solution for my problem.  I belive my button is
> coupled with some Java script which mess thing up and there is no a
> easy solution.  Am I right?

Yes.


John



From reinhold-birkenfeld-nospam at wolke7.net  Sat Apr  9 13:09:46 2005
From: reinhold-birkenfeld-nospam at wolke7.net (Reinhold Birkenfeld)
Date: Sat, 09 Apr 2005 19:09:46 +0200
Subject: workaround for generating gui tools
In-Reply-To: <1113061810.530359.172720@g14g2000cwa.googlegroups.com>
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be>
	<1113061810.530359.172720@g14g2000cwa.googlegroups.com>
Message-ID: <3bqgh6F6larilU1@individual.net>

Harlin Seritt wrote:
> Benedict,
> 
> Best to hand-code your code ;-) -- even GUI. This is kind of why I like
> Tkinter so much. Good luck.

Have to disagree strongly.

It's evil anyway (for more complex applications) to put GUI construction
in your code. GUI should be described appropriately in data files.

Glade does this very good, and with pygtk it's no problem to use the XML files.

Reinhold


From cookedm+news at physics.mcmaster.ca  Tue Apr 12 15:23:27 2005
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Tue, 12 Apr 2005 15:23:27 -0400
Subject: Threads and variable assignment
References: <vu9f3d.8fh.ln@lightning.itga.com.au>
Message-ID: <qnkwtr7yf2o.fsf@arbutus.physics.mcmaster.ca>

Gregory Bond <gnb at itga.com.au> writes:

> I've had a solid hunt through the (2.3) documentation but it seems
> silent on this issue.
>
> I have an problem that would naturally run as 2 threads:  One monitors
> a bunch of asyncrhonous external state and decides if things are
> "good" or "bad".  The second thread processes data, and the processing
> depends on the "good" or "bad" state at the time the data is processed.
>
> Sort of like this:
>
> Thread 1:
>
> global isgood
> while 1:
> 	wait_for_state_change()
> 	if new_state_is_good():
> 		isgood = 1
> 	else:
> 		isgood = 0
>
> Thread 2:
>
> s = socket(....)
> s.connect(...)
> f = s.makefile()
> while 1:
> 	l = f.readline()
> 	if isgood:
> 		print >> goodfile, l
> 	else:
> 		print >> badfile, l

You said that the processing depends on the good or bad state at the
time the data is processed: I don't know how finely-grained your state
changes will be in thread 1, but it doesn't seem that thread 2 would
notice at the right time. If the socket blocks reading a line, the
state could change i

> What guarantees (if any!) does Python make about the thread safety of
> this construct?   Is it possible for thread 2 to get an undefined
> variable if it somehow catches the microsecond when isgood is being
> updated by thread 1?

It won't be undefined, but it's possible that (in thread 1)
between the "if new_state_is_good()" and the setting of isgood that
thread 2 will execute, so if new_state_is_good() was false, then it
could still write the line to the goodfile.

It really depends on how often you have state changes, how often you
get (full) lines on your socket, and how much you care that the
correct line be logged to the right file.

If you needed this to be robust, I'd either:

- Try to rewrite wait_for_status_change()/new_state_is_good() to be
  asynchronous, particularly if wait_for_status_change() is blocking
  on some file or socket object. This way you could hook it into
  asynchat/asyncore or Twisted without any threads.

- Or, if you need to use threads, use a Queue.Queue object where
  timestamps w/ state changes are pushed on in thread 1, and popped
  off and analysed before logging in thread 2. (Or something; this
  just popped in my head.)

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From rbt at athop1.ath.vt.edu  Thu Apr 21 10:19:22 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Thu, 21 Apr 2005 10:19:22 -0400
Subject: recording data between [ and ]
In-Reply-To: <UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
References: <d488q5$apl$1@solaris.cc.vt.edu>
	<UbqdnXB1cNHtLvrfRVn-rw@powergate.ca>
Message-ID: <d48cpb$hij$1@solaris.cc.vt.edu>

Peter Hansen wrote:
> rbt wrote:
> 
>> Output from 'netstat -b' on a win2003 server will show what binary is 
>> responsible for the connection. For example, it may list something 
>> like this along with other connection specific data:
>>
>> [lsass.exe]
>> [System]
>> [firefox.exe]
>> [iexplorer.exe]
>>
>> How might I process the output so that anything within brackets is 
>> recorded to a log file of my own making? I know how to parse and 
>> record things to a file, I don't know how to look make '[' and ']' 
>> appear as special characters so that I can record what's between them.
> 
> 
> Does this help?
> 
>  >>> import re
>  >>>
>  >>> s = '''stuff   [lsass.exe]
> ... [System]  more stuff
> ... xxxxx [firefox.exe] ......
> ... '''
>  >>>
>  >>> re.findall(r'\[([^]]*)\]', s)
> ['lsass.exe', 'System', 'firefox.exe']
> 
> -Peter

Yes, it does... may take me a few minutes to get my head around it 
though. Why do re's have to be so arcane and complicated... especially 
in Python?

It's hard to preach 'ease of use' with stuff such as this in the 
language. Perhaps one day it can be rolled up into something that 
*really* is easy to understand:

import string

fp = file('filename')
data = fp.read()
fp.close()

string.between(data,[,])


From ckwiguno at gmail.com  Sun Apr 24 15:03:26 2005
From: ckwiguno at gmail.com (Clara)
Date: 24 Apr 2005 12:03:26 -0700
Subject: opening new window in one window using Tkinter -- Help please
In-Reply-To: <mailman.2417.1114369026.1799.python-list@python.org>
References: <1114365774.690048.280150@l41g2000cwc.googlegroups.com>
	<1114368587.303696.90130@l41g2000cwc.googlegroups.com>
	<mailman.2417.1114369026.1799.python-list@python.org>
Message-ID: <1114369406.618811.316110@f14g2000cwb.googlegroups.com>

since the file where i call the first window and the second window is
different,.If I put app.master.withdraw() there,...won't I get error
message that says; app is not defined as global or something like that?



From fredrik at pythonware.com  Mon Apr  4 10:52:00 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 4 Apr 2005 16:52:00 +0200
Subject: Change between Python 2.3 and 2.4 under WinXP
References: <l8mo411a1i3nu6dqo2t734mqorquqehm7v@4ax.com><mailman.1280.1112603141.1799.python-list@python.org>
	<g9a4e.3706$44.2884@newsread1.news.atl.earthlink.net>
Message-ID: <d2rk62$e90$1@sea.gmane.org>

Lucas Raab wrote:

> not to be biased toward your own products at all, or course :-)

I'm not aware of any other tool that solves that specific problem.

</F> 





From aaronwmail-usenet at yahoo.com  Fri Apr  1 08:57:32 2005
From: aaronwmail-usenet at yahoo.com (aaronwmail-usenet at yahoo.com)
Date: 1 Apr 2005 05:57:32 -0800
Subject: ANNOUNCE: xsdb release with N/A support and more
Message-ID: <1112363852.829542.165590@f14g2000cwb.googlegroups.com>

The new xsdbXML_cs_java_py_01 release adds a
"not applicable" attribute restriction and
completes the same/ifknown/otherwise implementations
as well as some bugfixes including a fix for
a performance bug in the java implementation.

The xsdb framework provides a flexible and well defined
infrastructure to allow tabular data to be published,
retrieved, and combined over the Internet.

There are three separate implementations: a Python
implementation, a C#/.NET implementation, and a
java implementation. For all implementations all
source code is distributed using SourceForge.

Read more and download at
    http://xsdb.sourceforge.net

Thanks,  -- Aaron Watters

===
KIDS MAKE NUTRITIOUS SNACKS
  -- a "real life headline"
  http://www.anvari.org/shortjoke/Newspaper_Headlines



From enleverlesO.OmcO at OmclaveauO.com  Mon Apr 11 15:55:35 2005
From: enleverlesO.OmcO at OmclaveauO.com (Do Re Mi chel La Si Do)
Date: Mon, 11 Apr 2005 21:55:35 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
Message-ID: <425ad806$0$3146$8fcfb975@news.wanadoo.fr>

Hi !

This DLL come also with MS-JVM engine, who is free.  Therefore...

-- 
Michel Claveau





From steve at holdenweb.com  Thu Apr 21 06:31:15 2005
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 21 Apr 2005 06:31:15 -0400
Subject: Dictionary question.
In-Reply-To: <8c7f10c60504210317a51586@mail.gmail.com>
References: <1114076862.063504.256970@g14g2000cwa.googlegroups.com>
	<8c7f10c60504210317a51586@mail.gmail.com>
Message-ID: <d47v57$ldk$1@sea.gmane.org>

Simon Brunning wrote:
> On 21 Apr 2005 02:47:42 -0700, hawkesed <olaamigoquepasa at hotmail.com> wrote:
> 
>>  I am semi new to Python. Here is my problem : I have a list of 100
>>random integers. I want to be able to construct a histogram out of the
>>data. So I want to know how many 70's, 71's, etc. I can't figure out
>>how to do this. A dictionary is supposedly can do key value pairs
>>right? I want to be able to see if say 75 is in the data structure, and
>>what its value is, then increment its value as I go through the list
>>finding items.
>>  I am sure there is a way to do this. Is a dictionary what I should be
>>using? Thanks for any help. Hope this makes sense, its getting very
>>late here.
> 
> 
> Sounds like homework, so I'll just say that yes, a dictionary would be
> ideal for what you are trying to do.
> 
And I will add that you have two different cases to cope with: the first 
time you come across a particular value you have to create a new element 
with a value of one. The second and subsequent times you have to add one 
to an existing element.

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From roy at panix.com  Thu Apr 21 11:35:43 2005
From: roy at panix.com (Roy Smith)
Date: 21 Apr 2005 11:35:43 -0400
Subject: goto statement
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<d48gbv$52l$1@swifty.westend.com>
	<116fhpmid1q0j2b@corp.supernews.com>
Message-ID: <d48h8f$i2d$1@panix2.panix.com>

Grant Edwards  <grante at visi.com> wrote:
>Sure, but what about the case where his program is on paper
>tape and all he has for an editor is an ice pick?

Can't you emulate that in emacs with M-X inclusive-or-overwrite-mode?


From nick at craig-wood.com  Mon Apr 18 11:30:04 2005
From: nick at craig-wood.com (Nick Craig-Wood)
Date: 18 Apr 2005 15:30:04 GMT
Subject: Nokia to speak at Python-UK next week
References: <mailman.1909.1113491601.1799.python-list@python.org>
Message-ID: <slrnd67hjt.lvd.nick@irishsea.home.craig-wood.com>

<andy at reportlab.com> <andy at reportlab.com> wrote:
>  I am please to announce that Tapio Tallgren of Nokia Research
>  Labs is coming to Python-UK to talk about Python on the Nokia Series
>  60 phones.  If you want to get hands-on, upgrade that handset now!

Cool!

Not entirely on topic, but does anyone know if there is a series 80
python?  Or if the series 60 python runs on a series 80 phone (eg
communicator 9300/9500)?

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


From abuse at solumslekt.org  Sat Apr 23 07:37:06 2005
From: abuse at solumslekt.org (Leif B. Kristensen)
Date: Sat, 23 Apr 2005 13:37:06 +0200
Subject: Python or PHP?
References: <1114254894.512656.297040@l41g2000cwc.googlegroups.com>
Message-ID: <Drqae.7818$SL4.174448@news4.e.nsc.no>

Lad skrev:

> Is anyone capable of providing Python advantages over PHP if there are
> any?

Much more compact and yet much more readable code, making it easier to
maintain and extend your programs.
-- 
Leif Biberg Kristensen
http://solumslekt.org/


From radam2_ at _tampabay.rr.com  Mon Apr 11 02:39:55 2005
From: radam2_ at _tampabay.rr.com (Ron_Adam)
Date: Mon, 11 Apr 2005 06:39:55 GMT
Subject: web authoring tools
References: <Xns9634E27D149BCvaneveryindiegamedes@207.69.189.191>
Message-ID: <844k515hnt5h470jf50dd5r9sumn4q59qu@4ax.com>

On Mon, 11 Apr 2005 05:14:47 GMT, "Brandon J. Van Every"
<mylastnameruntogether at mycompanyname.com> wrote:

>As is easily noticed, my website sucks.  Enough people keep ragging
>on me about it, that maybe I'll up and do something about it.  However,
>I currently have FrontPage 2000 and I hate it.  Ideally, I would like an
>open source website + html design tool implemented in Python, so
>that possibly someday I can fix whatever's broken about it.  That said,
>I would like a tool that actually saves me work as a web designer.  I
>don't feel that FrontPage 2000 does this.  I'm saying there's a certain
>level of maturity that has to exist in the app, it can't be some "alpha
>quality" thing.  If you know of such a beast in Python, please
>let me know.

I've always found a html aware text editor works best.  Programs like
front page tend to try to insert things when and where you don't want
them.  So you end up fighting the program and/or having to get their
bugs out of your web site.  I'm sure there are probably some good
visual what you see is what you get editors, but Just have't found any
I like.

I would use commercial software package if I was doing an internet
store with an inventory database, and shopping carts.  That's a
situation where you want your web sight to be in a standard proven
format. But you hand over a lot of design freedom also.

>Here are some examples of reasonable website designs for my purposes as
>a game developer or consultant: 
>
>http://www.igda.org/seattle/
>http://www.cyphondesign.com/
>http://www.alphageeksinc.com/
>http://www.gamasutra.com

These top three where done with text editors. If you view the source,
you will notice the formatting has good consistent indenting and there
isn't a lot of extra tags or other information needlessly inserted.

They make good use of CSS for formatting also.  If this is the type of
thing you want, save the pages and study how they did it.  Use your
own text and graphics of course.

The fourth one in your list uses something called SiteCatalyst, which
I'm not familiar with. The web site to it is listed in the source.
You'll notice it has empty spaces and inconsistent indenting due to it
being assembled from templates.

>I'm not sure if I want a blogging capability, or something more like
>Gamasutra.  That's a quality vs. quantity issue.  I don't know if I want
>a web forum.  I generally don't like web forums and I've tended to let
>Yahoo! Groups do the mailing list job.

Since you're unsure of what you want, you should probably follow the
rule, 'if in doubt, leave it out',  you can always expand or add
features later.

>I believe my webhost can take either Unix or Windows stuff.  My local
>machine where I do all development is Windows.  I'd be interested to
>know about Linux solutions too though.

Here's a good place to start, to find python web site software.

http://www.python.org/topics/web/


Hope this helped,

Cheers,
Ron



From nospam at nospam.com  Tue Apr  5 10:40:43 2005
From: nospam at nospam.com (3c273)
Date: Tue, 5 Apr 2005 07:40:43 -0700
Subject: Insert database rows from CSV file
References: <d2sb9901nlr@enews3.newsguy.com>
	<CuSdndFAEfVYIczfRVn-iw@comcast.com>
	<d2sgje01vc1@enews3.newsguy.com>
	<bp2451l8psd6qnid15jpmv0ooipqsl95b0@4ax.com>
Message-ID: <d2u81b020p5@enews4.newsguy.com>


"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message
news:bp2451l8psd6qnid15jpmv0ooipqsl95b0 at 4ax.com...
> On Mon, 4 Apr 2005 15:54:37 -0700, "3c273" <nospam at nospam.com> declaimed
> the following in comp.lang.python:
>
> > Thanks for the link, but this is the step I am trying to save (for
someone
> > else). Every time he goes to run a report, he must stop and import any
new
> > csv files. Since the files are generated by a Python script, I thought I
>
> That information wasn't supplied in the original message. Your
> original post implied that the data source /was/ the CSV file...
>
> Show us the code segment that is writing the CSV file, and we
> can probably show you the DB-API equivalent for "writing" a new record
> to the table.
>
> For short however:
>
> aCustomer = "Customer1"
> theWidget = "Widget1"
> aQuantity = 1000
>
> # I'm presuming the table only has the three columns, since you didn't
> list fields
> cursor.execute(""" INSERT INTO "Table1" Values (%s, %s, %s) """,
> (aCustomer, theWidget, aQuantity))

Ah.. Many thanks. This is what I was looking for.
Louis




From lothar at ultimathule.nul  Wed Apr  6 18:12:25 2005
From: lothar at ultimathule.nul (lothar)
Date: Wed, 6 Apr 2005 22:12:25 -0000
Subject: re module non-greedy matches broken
References: <mailman.1325.1112651826.1799.python-list@python.org>
	<1155e6kak0ufk60@corp.supernews.com>
	<7426741.asbeVpWDNU@news.perlig.de>
Message-ID: <1158nmnq02o0g0f@corp.supernews.com>

well done.
i had not noticed the lookahead operators.


"Andr?? Malo" <auch-ich-m at g-kein-spam.com> wrote in message
news:7426741.asbeVpWDNU at news.perlig.de...
> * lothar wrote:
>





From axel at straschil.com  Wed Apr  6 01:56:18 2005
From: axel at straschil.com (Axel Straschil)
Date: 06 Apr 2005 05:56:18 GMT
Subject: Python IDE like NetBeans/Delphi IDE
References: <mailman.1376.1112702768.1799.python-list@python.org>
	<q8pueyi8zn9d.sh0wtybdkgxg.dlg@40tude.net>
Message-ID: <slrnd56ug2.9rv.axel@m2.sine>

Hello!

> WingIDE (commercial, slower than PythonWin but has many features)

You can use and reactivate a trial licence for WingIDE for a realy long
term, give it a try, i bought a licence last week and realy love it!

Lg,
AXEL.
-- 
"Aber naja, ich bin eher der Forentyp." Wolfibolfi's outing in 
http://www.informatik-forum.at/showpost.php?p=206342&postcount=10


From swaroopch at gmail.com  Wed Apr  6 12:24:52 2005
From: swaroopch at gmail.com (Swaroop C H)
Date: Wed, 6 Apr 2005 21:54:52 +0530
Subject: Calling a Perl Module from Python
In-Reply-To: <20050406025357.85585.qmail@web20708.mail.yahoo.com>
References: <20050406025357.85585.qmail@web20708.mail.yahoo.com>
Message-ID: <351e8871050406092449d4585b@mail.gmail.com>

On Apr 6, 2005 8:23 AM, gf gf <unknownsoldier93 at yahoo.com> wrote:
> I've recently made the switch.  Wow, is Python great!
> One thing which I haven't been able to do is replace
> Perl's great lib collection (HTML::Parser, for
> instance, can do a lot that Soup just can't).

You've just discovered the only limitation of Python (in my view) - it
doesn't have a module repository to rival CPAN.

AFAIK, there isn't any reliable way to call Perl modules from Python.


-- 
Swaroop C H
Blog: http://www.swaroopch.info
Book: http://www.byteofpython.info


From james at wrong.nu  Thu Apr 14 17:52:22 2005
From: james at wrong.nu (R. C. James Harlow)
Date: Thu, 14 Apr 2005 22:52:22 +0100
Subject: Supercomputer and encryption and compression @ rate of 96%
In-Reply-To: <200504142221.41290.james@wrong.nu>
References: <1113470846.970773.4780@g14g2000cwa.googlegroups.com>
	<425EDE12.3030208@transnorm.ch> <200504142221.41290.james@wrong.nu>
Message-ID: <200504142252.29233.james@wrong.nu>

On Thursday 14 April 2005 22:21, R. C. James Harlow wrote:
> You have to do that before Fredrick's script works...

Damn - 'Fredrik's' - I accidentally decompressed his name.
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From deetsNOSPAM at web.de  Sat Apr  9 13:59:18 2005
From: deetsNOSPAM at web.de (Diez B. Roggisch)
Date: Sat, 09 Apr 2005 19:59:18 +0200
Subject: workaround for generating gui tools
References: <eER5e.59987$FX4.4153412@phobos.telenet-ops.be><1113061810.530359.172720@g14g2000cwa.googlegroups.com>
	<3bqgh6F6larilU1@individual.net>
	<mailman.1625.1113067362.1799.python-list@python.org>
Message-ID: <d3955k$kne$00$1@news.t-online.com>

> why use data files when you have an extremely powerful programming
> language in your toolbox?  the advantage of building UI's in Python is
> that you can quickly create "domain specific UI languages", and use them
> to generate the interfaces for you.  UI editors may be useful for trivial
> applications, but if you're doing complex stuff, you sure want domain-
> specific abstractions.  Python gives you that, XML files don't.

If you do some creative rearranging of widgets and play around with
different layouts and geometry managers, a good gui-designer becomes very
useful.
-- 
Regards,

Diez B. Roggisch


From godoy at ieee.org  Fri Apr 29 07:38:49 2005
From: godoy at ieee.org (Jorge Godoy)
Date: 29 Apr 2005 08:38:49 -0300
Subject: Python site-packages and import
References: <ced73313.0504290331.6a0f39e4@posting.google.com>
Message-ID: <87sm19yfqu.fsf@jupiter.g2ctech>

theoryboy at my-deja.com (Peter Saffrey) writes:

> pzs at bonnie:~$ ls /usr/lib/python2.3/site-packages/id3       
> ID3.py  ID3.pyc  ID3.pyo
> 
> >>> import id3.ID3
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: No module named id3.ID3
> >>> 

It is missing a file named "__init__.py" at
/usr/lib/python2.3/site-packages/id3 

Without it Python won't consider "import id3" as valid (and consequently won't
import submodules as well). 

Just 'touch' the file and try again.

-- 
Jorge Godoy      <godoy at ieee.org>


From tlesher at gmail.com  Mon Apr  4 15:28:26 2005
From: tlesher at gmail.com (Tim Lesher)
Date: 4 Apr 2005 12:28:26 -0700
Subject: Status of Chaco?
Message-ID: <1112642906.229193.14360@g14g2000cwa.googlegroups.com>

I recently had reason to look up Chaco again, but after searching the
SciPy and Enthought websites, I see it seems to have gone missing.

Looking over c.l.p, I can find only one quasi-recent message from Eric
about at, from almost a year ago:

> Chaco has moved to a new package.  We hope to have it released within
> the next few weeks.

Is Chaco dead?  Or just pining?

-- 
Tim Lesher
<tlesher at gmail.com>



From jerf at jerf.org  Wed Apr 27 17:42:57 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Wed, 27 Apr 2005 17:42:57 -0400
Subject: tkinter text width
References: <mailman.2550.1114560111.1799.python-list@python.org>
	<mailman.2593.1114624338.1799.python-list@python.org>
	<pan.2005.04.27.19.10.51.37432@jerf.org>
	<mailman.2598.1114631546.1799.python-list@python.org>
Message-ID: <pan.2005.04.27.21.42.56.117571@jerf.org>

On Wed, 27 Apr 2005 12:52:21 -0700, James Stroud wrote:

> Thank you to everybody helping me. I think I am almost there...
> 
> On Wednesday 27 April 2005 12:10 pm, so sayeth Jeremy Bowers:
>> 2. Use a fixed-width font and manually wrap. (It's pretty easy then, you
>> can ask the font for how wide any char is and do the math from there.)
> 
> How might I query the size of a fixed-width font in pixles? It appears that 
> the width of the font in points does not correlate with its width in pixels 
> based on some simple expriments I have done. Using cget("font") on the Text 
> gives back a string with the point size.

Ah, in that case you want the measure attribute of the font object.

http://www.pythonware.com/library/tkinter/introduction/x4671-methods.htm

> 
>> [snip some things to worry about]
>> Basically, I'm pretty sure you can't do this.
> 
> My setup is not very complicated, so I don't think I have to worry about 
> kerning, unicode, etc.. I am using a fixed width font (courier) only, and 
> only one size and am also quite comfortable with giving away several pixels 
> at the end of a line for "rounding errors" and will filter for a limited 
> alphabet consisting only of the numbers, the captial letters, and the space.
> 
> I think I can do this given these limitations.

Sounds like it.

What I did was set up unit test that threw random snippets at the text
widget, and compared how many lines my code thought the widget should
have, vs. what the widget claimed to have. This is how I discovered that
some unicode was wrapped incorrectly. You can get what the widget claims
to have by asking it for the geometric position of the last character with
the bbox method of the Text widget.

This is, however, probably not the answer you are looking for, because you
only get a bounding box if the text is currently visible on the screen.
This makes it fairly difficult to use to ask the widget *how far* off the
screen the text is. If it were that easy I would have said so earlier
:-) But you may find that useful too, as you cobble together a solution.



From rkoida at yahoo.com  Fri Apr 22 02:39:03 2005
From: rkoida at yahoo.com (rkoida at yahoo.com)
Date: 21 Apr 2005 23:39:03 -0700
Subject: Run Unix shell command $ parse command line arguments in python
Message-ID: <1114151943.109628.65500@f14g2000cwb.googlegroups.com>

  Hello evryone

     I am a newbie to python. I have a makefile which i can compile in
UNIX/LINUX, But i
I am planning to write a python script which actually does what my
MAKEFILE does. The make file is

#Makefile and some scripts to give output
#numbers
#Change till sign #END
var1:=564-574
a1 = 23
b1 = 678
kxm = ixm_7.gh
out = c$(var1)_s.gh
imageim
#END
#other files
file1 = sec$(b1).jk
file2 = sgf$(a1)
file3 = p$(b1).gh
prg3scriptfile = prg3_produce.xx
findoutdir = Dir:~/home/
x=67
#work
evrything: prg1 script2 prg3 script4
withoutprg1: script2 prg3 script4
prg1:
        s$(ca)$(d) .

script2: Makefile
       ./script2 -i '$(file2)' -o '$(file1)' -a $(x) -n

prg3:
        : > $(prg3scriptfile)
>>  $(prg3scriptfile)
        prg3 $(prg3scriptfile)
        rm $(prg3scriptfile)
script4:
        ./script4 $(kxm) $(file2)  $(out)  $(var1)

I want to write a python script to replace this Makefile.
I Have tried using getopt/optparse for parsing command line options
How to Run  Unix shell command from python.

My Task is

Myprg.py a1 b1 kxm out

Kindly suggest me some ideas/comments.

Thanks
koid wayne



From theller at python.net  Tue Apr 26 13:35:32 2005
From: theller at python.net (Thomas Heller)
Date: Tue, 26 Apr 2005 19:35:32 +0200
Subject: how to pass an array to a VB array via COM
References: <1114515084.138728.26180@g14g2000cwa.googlegroups.com>
Message-ID: <8y358mqj.fsf@python.net>

"jelle" <jelleferinga at gmail.com> writes:

> Hi,
>
> I'm trying to script Rhino -the nurbs modeller, not the server soft-
> via COM.
> Which is good fun, except i cant seem to pass arrays to the program.
> I suppose its expecting VB arrays, and is not to keen when i send a
> tuple:
>
> RS.AddCurve(((1,2,3),(4,5,6),(7,8,9)),3)

To me it looks like you should try this instead, although this is pure
speculation:

 RS.AddCurve(((1,2,3),(4,5,6),(7,8,9)))

Thomas


From prabapython at yahoo.co.in  Fri Apr  1 02:25:01 2005
From: prabapython at yahoo.co.in (praba kar)
Date: Fri, 1 Apr 2005 08:25:01 +0100 (BST)
Subject: Ternary Operator in Python
In-Reply-To: 6667
Message-ID: <20050401072501.73672.qmail@web8408.mail.in.yahoo.com>

Dear All,
    I am new to Python.  I want to know how to
work with ternary operator in Python.  I cannot
find any ternary operator in Python.  So Kindly
clear my doubt regarding this

With regards,
Prabahar


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Mail - Helps protect you from nasty viruses. 
http://promotions.yahoo.com/new_mail


From vze4rx4y at verizon.net  Mon Apr  4 21:04:52 2005
From: vze4rx4y at verizon.net (Raymond Hettinger)
Date: Tue, 05 Apr 2005 01:04:52 GMT
Subject: StopIteration in the if clause of a generator expression
References: <d2j6au$k1o$04$1@news.t-online.com> <sKe3e.1424$7b.577@trndny01>
	<424db34c.51543105@news.oz.net> <Vzl3e.267$7b.220@trndny02>
	<d2o7g8$lc5$01$1@news.t-online.com> <_2R3e.3341$7b.3033@trndny06>
	<uqednS7IkJQ69M3fRVn-qQ@comcast.com> <eOg4e.2512$7b.37@trndny04>
	<fqqdnVdRvpeXM8zfRVn-2g@comcast.com>
Message-ID: <Uul4e.2689$7b.1684@trndny04>

> > Use a genexp when you need a generator
> > and use a listcomp when you need a list.

[Steven Bethard]
> So do I read this right in preferring
>      [<x> for <y> in <z>]
> over
>      list(<x> for <y> in <z>)

Yes!


Raymond




From robbiefcarlton at hotmail.com  Fri Apr 15 19:41:52 2005
From: robbiefcarlton at hotmail.com (robcarlton)
Date: 15 Apr 2005 16:41:52 -0700
Subject: eval function not working how i want it dag namn
In-Reply-To: <d3p29c$4rn$1@gemini.csx.cam.ac.uk>
References: <1113567261.483667.198430@z14g2000cwz.googlegroups.com>
	<d3olf8$7s7$1@gemini.csx.cam.ac.uk>
	<d3on01$cq8$02$2@news.t-online.com>
	<d3p29c$4rn$1@gemini.csx.cam.ac.uk>
Message-ID: <1113608512.081043.168400@g14g2000cwa.googlegroups.com>

thanks. I'll use the getattr function now, and I think I understand
where I went wrong with eval. I was thinking in Lisp where the lexical
scope would mean that obj is defined



From theller at python.net  Fri Apr 15 10:27:17 2005
From: theller at python.net (Thomas Heller)
Date: Fri, 15 Apr 2005 16:27:17 +0200
Subject: sort of a beginner question about globals
References: <1113354531.380490.81190@z14g2000cwz.googlegroups.com>
	<3aOdnX8D67t5PcHfRVn-qQ@comcast.com>
	<1113403451.556360.116630@f14g2000cwb.googlegroups.com>
	<GpSdndekpZygqMDfRVn-hw@comcast.com>
	<1113405724.301516.232000@f14g2000cwb.googlegroups.com>
	<6v-dnV7CJ7WZocDfRVn-oA@comcast.com>
	<1113422470.180010.172970@z14g2000cwz.googlegroups.com>
	<YdCdnX1-Q9TpA8DfRVn-hw@comcast.com>
	<1113434483.437663.206030@f14g2000cwb.googlegroups.com>
	<DNmdnVZhutRKQMDfRVn-qg@comcast.com>
	<1113481607.615479.72920@g14g2000cwa.googlegroups.com>
	<Xns963892E01D954duncanrcpcouk@127.0.0.1>
	<1113573592.248241.38550@z14g2000cwz.googlegroups.com>
Message-ID: <7jj4p12y.fsf@python.net>

"fred.dixon" <fred.dixon at gmail.com> writes:

> :) unit test is something on my to-learn list. seems involved and i
> haven't seen any straight forward tutorials yet. as yet i still
> consider myself a hobbyist  at best.

I would recommend "Test Driven Development" by Kent Beck
(Addison-Wesley).

Thomas


From grante at visi.com  Wed Apr 27 13:17:07 2005
From: grante at visi.com (Grant Edwards)
Date: Wed, 27 Apr 2005 17:17:07 -0000
Subject: compile shebang into pyc file
References: <1114528783.254398.299600@z14g2000cwz.googlegroups.com>
	<fb66056705042707372695904d@mail.gmail.com>
	<mailman.2582.1114615536.1799.python-list@python.org>
	<1114616582.677507.252650@z14g2000cwz.googlegroups.com>
	<mailman.2591.1114620619.1799.python-list@python.org>
Message-ID: <116vi8j9atvl411@corp.supernews.com>

On 2005-04-27, Fredrik Lundh <fredrik at pythonware.com> wrote:

> so you're saying that the set of people that can deal with no
> more than one file at a time but knows how to install and
> configure Python (which in itself comes with a few thousand
> files) is larger than zero?

There are a lot of Linux users who already have python
installed but don't know it.  Python was always a required package for
a RedHat install.  It's not required on some distros, but it's
installed by default and you've got to go out of your way to
de-selected it when you install.

I've found that giving Linux users a single file "executable"
Python script works wonderfully, but it's really only an option
for fairly small applications -- and I don't care if they have
source code.

-- 
Grant Edwards                   grante             Yow!  Look!! Karl Malden!
                                  at               
                               visi.com            


From elbertlev at gmail.com  Tue Apr  5 15:53:41 2005
From: elbertlev at gmail.com (elbertlev at gmail.com)
Date: 5 Apr 2005 12:53:41 -0700
Subject: Best editor?
In-Reply-To: <1112729823.852393.107000@o13g2000cwo.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<1112729823.852393.107000@o13g2000cwo.googlegroups.com>
Message-ID: <1112730821.686753.16250@l41g2000cwc.googlegroups.com>

Windows: textpad
Linux: vim



From sunnan at handgranat.org  Sun Apr  3 18:34:24 2005
From: sunnan at handgranat.org (Sunnan)
Date: Sun, 03 Apr 2005 22:34:24 GMT
Subject: boring the reader to death (wasRe: Lambda: the Ultimate
	DesignFlaw
In-Reply-To: <424edf02@nntp0.pdx.net>
References: <pan.2005.04.01.07.18.30.814168@ccs.neu.edu>
	<pan.2005.04.01.15.50.51.219430@jerf.org>
	<iUe3e.21015$d5.156054@newsb.telia.net>
	<mailman.1192.1112376393.1799.python-list@python.org>
	<d2kqqt$ss7$1@panix2.panix.com>
	<Rdo3e.21051$d5.155911@newsb.telia.net>
	<mailman.1221.1112416371.1799.python-list@python.org>
	<Vrv3e.133894$dP1.471335@newsc.telia.net>
	<424e8d1d$1@nntp0.pdx.net> <1112456559.835048@yasure>
	<424edf02@nntp0.pdx.net>
Message-ID: <Qb_3e.134003$dP1.471291@newsc.telia.net>

Scott David Daniels wrote:
> No, poetry is to be read slowly and carefully, appreciating the nuance
> at every point.  You should be able to read "past" python, while poetry
> is at least as much about the form of the expression as it is about
> what is being expressed.

Right, I agree with these descriptions of python vs "the poetry 
languages". I'm not sure whether I'd consider python particularly terse, 
though, but I don't know enough about it yet. (I've read a couple of 
programs but never started a project of my own in it, mainly because I 
love poetry. I can see the appeal of a "prose language", though.)


From rlmorgan at washington.edu  Mon Apr  4 16:38:19 2005
From: rlmorgan at washington.edu (rlmorgan at washington.edu)
Date: Mon, 4 Apr 2005 13:38:19 -0700
Subject: Good day
Message-ID: <20050405063308.91AEF1E4006@bag.python.org>

The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.


From codecraig at gmail.com  Thu Apr 14 16:07:30 2005
From: codecraig at gmail.com (codecraig)
Date: 14 Apr 2005 13:07:30 -0700
Subject: SimpleXMLRPCServer - disable output
Message-ID: <1113509250.602995.25500@o13g2000cwo.googlegroups.com>

Hi,
  I thought I posted this, but its been about 10min and hasnt shown up
on the group.
  Basically I created a SimpleXMLRPCServer and when one of its methods
gets called and it returns a response to the client, the server prints
some info out to the console, such as,

localhost - - [14/Apr/2005 16:06:28] "POST /RPC2 HTTP/1.0" 200 -

Anyhow, is there a way I can surpress that so its not printed to the
console? I looked at SimpleXMLRPCServer.py ...it doesn't explicitly
print that, I think perhaps std is...but not sure.   Any ideas??

thanks.



From aisaac0 at verizon.net  Mon Apr  4 00:42:34 2005
From: aisaac0 at verizon.net (David Isaac)
Date: Mon, 04 Apr 2005 04:42:34 GMT
Subject: checkbook manager
Message-ID: <_A34e.2207$1r6.248@trnddc02>

I'd like to try personal financial management using Python.
I just found PyCheckbook, but it does not support check printing.
Is there a Python check printing application kicking around?

Thanks,
Alan Isaac




From andre.roberge at gmail.com  Sat Apr 23 15:21:33 2005
From: andre.roberge at gmail.com (=?ISO-8859-1?Q?Andr=E9_Roberge?=)
Date: Sat, 23 Apr 2005 16:21:33 -0300
Subject: python and Tile Studio
Message-ID: <d4e6ul$cou$1@sea.gmane.org>

Has anyone used Python with Tile Studio to create games?

http://tilestudio.sourceforge.net/

Andr?



From jerf at jerf.org  Tue Apr 26 15:13:20 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Tue, 26 Apr 2005 15:13:20 -0400
Subject: delete will assure file is deleted?
References: <1114510350.912358.21990@f14g2000cwb.googlegroups.com>
	<8664y9n8hy.fsf@guru.mired.org>
	<1114512016.930540.164920@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.04.26.19.13.19.951487@jerf.org>

On Tue, 26 Apr 2005 03:40:16 -0700, ajikoe at gmail.com wrote:

> Hello Mike,
> I have to know this topic otherwise my program has to check whether the
> file / files are already deleted and this is a little bit messy.

I would be fairly confident in asserting that assuming the file is there,
you have permissions, etc., basically that the call succeeds, that the
file will be gone.

os.remove, as the module name implies, tells the OS to do something. I
would consider an OS that returned from a "remove" call, but still let you
access that file, highly broken. 

You may be concerned that the OS may not write the fact that the file is
deleted to the disk right away. This is very, very possible; OSs have been
doing that for a while. If, for some reason, this is a major concern that
the system might suddenly lose power and the file may not be truly
deleted, you will need to either shut off this feature (it is called
"write-behind caching", and shutting it off, or indeed even having the
feature at all, is OS-dependent), or get a UPS so that the machine has
time to shut down gracefully.

HOWEVER... the only time this is a problem is if you are truly concerned
about the power spontaneously shutting off. The kernel of your operating
system, if indeed it does write-behind caching at all, will make it look
to all programs on the system (not just your own) that the file is
deleted; and thus, in every sense that matters barring spectacular
power failure, it is.

So I say, ever if you've heard of write-behind caching and you are perhaps
worried about it, you do not need to be; it is intended to be fully
transparent to you, and indeed, short of directly asking the OS whether
the feature is on, there should be no practical way of figuring out
whether it is on at all. All it means is significantly better performance
to you programs if they do things like delete a lot of files at once; you
don't need to worry that they might "still be there" even after the
command is done.

This reply somewhat longer than needed for the purposes of education :-)



From zghelp at mail.powerleader.com.cn  Tue Apr 26 04:57:03 2005
From: zghelp at mail.powerleader.com.cn (zghelp)
Date: Tue, 26 Apr 2005 16:57:03 +0800
Subject: =?iso-8859-1?q?c++=C8=E7=BA=CE=CF=F2python=B5=C4=BD=C5=B1=BE=B4?=
	=?iso-8859-1?q?=AB=B5=DD=D2=BB=B8=F6=C0=E0=D7=F7=CE=AA=B2=CE=CA=FD?=
	=?iso-8859-1?q?=A1=A3?=
Message-ID: <d4l0b3$2van$1@mail.cn99.com>

????????boost.python

????????????

using namespace boost::python;

struct World
{
 void set(std::string msg) { this->msg = msg; }
 std::string greet() { return msg; }
 std::string msg;
};

BOOST_PYTHON_MODULE(hello)
{
 class_<World>("World")
  .def("greet", &World::greet)
  .def("set", &World::set)
  ;
}

int _tmain(int argc, _TCHAR* argv[])
{
 Py_Initialize();

 if (!Py_IsInitialized())
  return -1;

 inithello();

 PyRun_SimpleString("import sys");
 PyRun_SimpleString("sys.path.append('./')");

 PyObject* pName,*pModule,*pDict,*pFunc,*pArgs;

 pName = PyString_FromString("pytest");
 pModule = PyImport_Import(pName);
 if (!pModule)
  return -1;

 pDict = PyModule_GetDict(pModule);
 if (!pDict)
  return -1;

 pFunc = PyDict_GetItemString(pDict,"add");
 if (!pFunc || !PyCallable_Check(pFunc))
  return -1;

 World w;
 w.set("hi from main!");

 pArgs = PyTuple_New(3);
 PyTuple_SetItem(pArgs,0,Py_BuildValue("i",3));
 PyTuple_SetItem(pArgs,1,Py_BuildValue("i",4));
 PyTuple_SetItem(pArgs,2,Py_BuildValue("O",&w));

 try
 {
  PyObject_CallObject(pFunc,pArgs);
 }
 catch(error_already_set)
 {
  // handle the exception in some way
 }

 Py_DECREF(pName);
 Py_DECREF(pArgs);
 Py_DECREF(pModule);

 Py_Finalize();
 getchar();

 return 0;
}

??????????

import hello
from hello import *
def add(a,b,t):
 print "a + b = " + str(a+b)
 w = hello.World()
 w.set("hi from script!")
 print w.greet()
 print t.greet()
 return

??????????print t.greet()????????

????????????????????????????????python????????




From farcepest at gmail.com  Tue Apr 12 16:54:12 2005
From: farcepest at gmail.com (Andy Dustman)
Date: 12 Apr 2005 13:54:12 -0700
Subject: database in python ?
References: <1113197530.990898.46130@z14g2000cwz.googlegroups.com>
	<1113216765.784331.156820@f14g2000cwb.googlegroups.com>
	<op.so2d8n2cqfv3if@localhost>
	<mailman.1684.1113228968.1799.python-list@python.org>
	<1113333625.215786.198580@l41g2000cwc.googlegroups.com>
Message-ID: <1113339252.851450.184620@z14g2000cwz.googlegroups.com>

Buck Nuggets wrote:

> 1.  mysql doesn't support transactions - one of its io layers
(innodb)
> does.  If you're hoping to get your application hosted you will find
> that most mysql installations don't support innodb.  And due to the
> bugs in mysql, when you attempt to create a transaction-safe table in
> mysql if innodb isn't available it will just silently create it in
> myisam, and your transactions will be silently ignored.

That's not a bug; it's an explicitly-stated design choice.

http://dev.mysql.com/doc/mysql/en/create-table.html

     If a storage engine is specified that is not available, MySQL
     uses MyISAM instead.

> 2.  mysql is still missing quite a few database basics - views are
the
> most amazing omission, but the list also includes triggers and stored
> procedures as well.  Although most of these features are included in
> the new beta, they aren't yet available in production.

Views, triggers, stored procedures are all available in 5.0.2 (beta).

> 3.  mysql has an enormous number of non-standard features such as
> comment formatting, how nulls work, concatenation operator, etc.
This
> means that you'll learn non-standard sql, and most likely write
> non-portable sql.

SET GLOBAL sql_mode='ansi'; and you won't have to worry about it.

> 4.  additionally, mysql has a peculiar set of bugs - in which the
> database will change your data and report no exception.  These bugs
> were probably a reflection of mysql's marketing message that the
> database should do nothing but persist data, and data quality was the
> responsibility of the application.  This self-serving message appears
> to have been dropped now that they are catching up with other
products,
> but there's a legacy of cruft that still remains.  Examples of these
> errors include:  silent truncation of strings to fit max varchar
> length, allows invalid dates, truncation of numeric data to fit max
> numeric values, etc.

MySQL gives warnings when data is truncated or misformatted.

http://dev.mysql.com/doc/mysql/en/mysql-info.html
http://dev.mysql.com/doc/mysql/en/mysql-warning-count.html
http://dev.mysql.com/doc/mysql/en/show-warnings.html

Since we're in comp.lang.python, MySQLdb-1.2 uses the warnings module
to alert you to this. MySQLdb-1.0 and earlier would raise a Warning
exception (or not, if you used a different cursor class).

Implicit default column values can disabled in 5.0.2 by running the
server in strict mode.

http://dev.mysql.com/doc/mysql/en/server-sql-mode.html

> 5.  cost: mysql isn't expensive, but it isn't free either.  Whether
or
> not you get to use it for free depends on how you interpret their
> licensing info and faq.  MySQL's recommendation if you're confused
(and
> many are) is to license the product or call one of their reps.

MySQL is licensed under the GPL. You can buy a commercial license if
you don't want the GPL's restrictions.

http://www.mysql.com/company/legal/licensing/

> Bottomline - mysql has a lot of marketshare, is improving, and I'm
sure
> that it'll eventually be a credible product.  But right now it's has
a
> wide range of inexcusable problems.

It's not a bug if you didn't RTFM.



From harold.fellermann at upf.edu  Fri Apr  1 11:28:46 2005
From: harold.fellermann at upf.edu (harold fellermann)
Date: Fri, 1 Apr 2005 18:28:46 +0200
Subject: class attributes and inner classes in C extensions
In-Reply-To: <26f807b9d58f39d1ae191249a187caf4@upf.edu>
References: <26f807b9d58f39d1ae191249a187caf4@upf.edu>
Message-ID: <0df56344e5fdb15f71c23a4e5b727bb5@upf.edu>

> I am working on a C extension module that implements a bunch of 
> classes. Everything
> works fine so far, but I cannot find any way to implement class 
> attributes or inner
> classes. Consider you have the following lines of Python :
>
> class Foo :
> 	class Bar :
> 		pass
>
>      spam = "foobar"
>
> How can this class be translated to a C extension? Is there anything 
> comparable to
> PyMethodDef that can be used for other attributes than functions?

O.k. I found it out now, and in order to improve the knwoledge base of 
the mailing
list, I will answer my question myself.

The PyTypeObject structure has a field tp_dict that holds the 
dictionary of the
class object. You can initialize it with a dictionary that holds class 
attributes.
If you provide a custom dictiomary, you must do so _before_ 
PyType_Ready() is called,
because PyType_Ready adds other entries to this dictionary.

This is my C extension of the above. It works great for me:

static PyTypeObject FooType = {
	/* ... snip ... */
	0,					// tp_dict
	/* ... snip ... */
};

static PyTypeObject FooBarType = {
	/* ... snip ... */
};

PyMODINIT_FUNC inithyper(void)
{
     /*
         the following lines add class attributes to the types tp_dict:
     */
     FooType.tp_dict = PyDict_New();
     PyDict_SetItemString(FooBarType,"Bar",(PyObject *)&FooBarType);
     
PyDict_SetItemString(FooBarType,"spam",PyString_FromString("foobar"));

     PyObject* m;
     if (PyType_Ready(&hFooType) < 0) return;
     if (PyType_Ready(&hFooBarType) < 0) return;

     m = Py_InitModule3("my_module", NULL, "some documentation");

     Py_INCREF(&FooType);
     PyModule_AddObject(m, "Foo", (PyObject *)&FooType);

     Py_INCREF(&hyper_FooBarType);
     PyModule_AddObject(m, "Bar", (PyObject *)&FooBarType);
}


Documentation for tp_dict can be found in the API:
http://docs.python.org/api/type-structs.html


- harold -

--
"2x2 = gr?n"
-- Heinz von Foerster



From peter at engcorp.com  Tue Apr 12 12:22:37 2005
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 12 Apr 2005 12:22:37 -0400
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <F4CdnYojx8MiN8bfRVn-2w@comcast.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
	<F4CdnYojx8MiN8bfRVn-2w@comcast.com>
Message-ID: <FKydnWjMkrRTaMbfRVn-3g@powergate.ca>

Joe Smith wrote:
> Xah Lee wrote:
>> of motherf***ing irrevalent drivel?
> 
> I am greatly amused.
> A troll impersonating Xah Lee has made xah look like a total moron.
> LOL

Sorry, Joe, but why do you think this wasn't Xah?
Every detail of the post is consistent with his
recent postings.

And a secondary, but purely rhetorical, question:
how could the post have made him look like a moron
when he already looked like one?


From jepler at unpythonic.net  Mon Apr 18 20:16:18 2005
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 18 Apr 2005 19:16:18 -0500
Subject: fpectl
In-Reply-To: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
References: <1113830188.480812.141380@f14g2000cwb.googlegroups.com>
Message-ID: <20050419001617.GB10263@unpythonic.net>

It looks like the automatic build of the 'fpectl' module was broken
somewhere along the line, perhaps when the transition from Modules/Setup
to setup.py took place.

Once I made the change below and rebuilt, I got the fpectl module.
Furthermore, it appeared to "do something" on my Linux/x86 system:

$ ./python -c '1e200 ** 6'
OverflowError: (34, 'Numerical result out of range')
$ ./python -c 'import fpectl; print dir(fpectl); fpectl.turnon_sigfpe(); 1e200 ** 6'
['__doc__', '__file__', '__name__', 'error', 'turnoff_sigfpe', 'turnon_sigfpe']
Fatal Python error: Unprotected floating point exception
Aborted

Jeff


Index: setup.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/setup.py,v
retrieving revision 1.217
diff -u -u -r1.217 setup.py
--- setup.py	15 Apr 2005 20:32:39 -0000	1.217
+++ setup.py	19 Apr 2005 00:13:15 -0000
@@ -400,6 +400,8 @@
         # select(2); not on ancient System V
         exts.append( Extension('select', ['selectmodule.c']) )
 
+        exts.append( Extension('fpectl', ['fpectlmodule.c']) )
+
         # The md5 module implements the RSA Data Security, Inc. MD5
         # Message-Digest Algorithm, described in RFC 1321.  The
         # necessary files md5c.c and md5.h are included here.
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From steve at holdenweb.com  Mon Apr 11 16:06:01 2005
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 11 Apr 2005 16:06:01 -0400
Subject: smtplib does not send to all recipients
In-Reply-To: <1113246181.843652.158520@o13g2000cwo.googlegroups.com>
References: <1113244721.415164.81290@f14g2000cwb.googlegroups.com>
	<1113246181.843652.158520@o13g2000cwo.googlegroups.com>
Message-ID: <d3el53$mkr$1@sea.gmane.org>

dccarson at gmail.com wrote:
> I changed debuglevel to 1 and looked at the response on the recipient
> names.  They are BOTH accepted, but still only my id (d123456) receives
> the e-mail.  The long id (d1234567890) never gets the e-mail.  Here is
> the excerpt of the exchange.
> 
> send: 'mail FROM:<d123456 at myDomainHere.com> size=160\r\n'
> reply: '250 2.1.0 <d123456 at myDomainHere.com>... Sender ok\r\n'
> reply: retcode (250); Msg: 2.1.0 <d132456 at myDomainHere.com>... Sender
> ok
> send: 'rcpt TO:<d123456>\r\n'
> reply: '250 2.1.5 <d123456>... Recipient ok\r\n'
> reply: retcode (250); Msg: 2.1.5 <d123456>... Recipient ok
> send: 'rcpt TO:<d1234567890>\r\n'
> reply: '250 2.1.5 <d1234567890>... Recipient ok\r\n'
> reply: retcode (250); Msg: 2.1.5 <d1234567890>... Recipient ok
> 

In which case the Python is working perfectly correctly and you need to 
take the matter up with whoever runs the SMTP server. Are you sure the 
address is actually valid?

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From jfine at pytex.org  Thu Apr 14 13:53:46 2005
From: jfine at pytex.org (Jonathan Fine)
Date: Thu, 14 Apr 2005 18:53:46 +0100
Subject: Simple Python + Tk text editor
References: <425D6641.5050906@pytex.org> <7xfyxuqxe3.fsf@ruckus.brouhaha.com>
	<425E0286.2020402@pytex.org> <opso7qetgdrqur0o@eb.pragmadev>
Message-ID: <425EAE2A.3050507@pytex.org>

Eric Brunel wrote:
<snip>

> Do you know the (apparently dead) project named e:doc? You can find it 
> here:
> http://members.nextra.at/hfbuch/edoc/
> It's a kind of word processor that can produce final documents to 
> various formats using backends, and one of the backends is for LaTeX.
> 
> It's written in Perl, but with Perl::Tk as a tool-kit, so it is quite 
> close to Tkinter. There may be some ideas to steal from it.


Thanks for this.  I've not seen it before

There are quite a few GUI semi-wysiwyg front ends to (La)TeX.

Interesting that there are so many, and that besides LyX few
seem to have succeeded.  Guess it's an important problem that
is also difficult.

My approach is a rather different - it is to exploit running
TeX as a daemon
   http://www.pytex.org/texd

This allows for Instant Preview.  My application is simply
a means of show-casing this capability.  And making it
useful in simple contexts.

So what I'm really wanting to do is provide a component for
projects such as e:doc.

Any, this might be a bit off-topic.

And thanks again for the link.

-- 
Jonathan
http://qatex.sourceforge.net





From martin.witte at gmail.com  Tue Apr  5 15:23:25 2005
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 5 Apr 2005 12:23:25 -0700
Subject: Best editor?
In-Reply-To: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
Message-ID: <1112729005.469196.175820@o13g2000cwo.googlegroups.com>

I use gedit under gnome, works perfect, it is very easy to use, it has
the colours - it also supports other languages.



From peufeu at free.fr  Sat Apr 16 06:50:30 2005
From: peufeu at free.fr (peufeu at free.fr)
Date: Sat, 16 Apr 2005 12:50:30 +0200
Subject: pre-PEP: Simple Thunks
References: <Pine.A41.4.61b.0504151613530.152682@dante76.u.washington.edu>
Message-ID: <op.spbm2gdqpda12i@localhost>


	I think your proposal is very interesting, I've been missing code blocks  
in Python more and more as time goes by.
	I'll answer to both the 'thunks" proposal and the "suite-based keywords"  
proposal here.

	I find the Ruby syntax rather dirty though, because it has a lot of  
implicit stuff, treats code blocks as different from normal arguments,  
allows passing only one code block, needs a proc keyword, has yield  
execute an implicit block... all this, coming from a Python "explicit is  
better than implicit" background (which makes a lot of sense) is simply  
ugly.
	I like your syntax but have a few comments.
	I'll give you an unordered list of ideas, up to you to do what you like  
with them.

	Keep in mind that most of the problems come from the "space is  
significant" thing, which is IMHO a very good idea, but prevents us from  
putting code in expressions, like :

	func( a,b, def callback( x ):
		print x
	)

	or does it ? maybe this syntax could be made to work ?

****************************************
	Comments on the thunks.

	First of all I view code blocks as essential to a language. They are very  
useful for a lot of common programming tasks (like defining callbacks in  
an elegant way) :

	button = create_button( "Save changes" ):
		do
			self.save()

	However it seems your thunks can't take parameters, which to me is a big  
drawback. In ruby a thunk can take parameters. Simple examples :

	field = edit_field( "initial value", onsubmit={ |value| if  
self.validate(value) then do something else alert( "the value is invalid"  
) } )
	[1,3,4].each { |x| puts x }

	This has the advantage that the interface to the thunk (ie. its  
parameters) are right there before your eyes instead of being buried in  
the thunk invocation code inside the edit_field.

	a more complex random example :

	fields['password1'] = edit_field( "Enter Password" )
	fields['password2'] = edit_field( "Enter it again", onsubmit = {|value,  
other_values| if value != other_values['password_1'] then alert('the two  
passwords must be the same !") }

	So I think it's essential that thunks take parameters and return a value  
(to use them effectively as callbacks).
	What shall distinguish them from a simple alteration to def(): which  
returns the function as a value, and an optional name ? really I don't  
know, but it could be the way they handle closures and share local  
variables with the defining scope. Or it could be that there is no need  
for two kinds of function/blocks and so we can reuse the keyword def() :

	If you wish to modify def(), you could do, without creating any keyword :

# standard form
f = def func( params ):
	code

# unnamed code block taking params
func = def (params):
	code

	Note that the two above are equivalent with regard to the variable  
"func", ie. func contains the defined function. Actually I find def  
funcname() to be bloat, as funcname = def() has the same functionality,  
but is a lot more universal.

# unnamed block taking no params
f = def:
	code

***************************************************
	Comments on the suite-based keywords.

	Did you notice that this was basically a generalized HEREDOC syntax ?

	I'd say that explicit is better than implicit, hence...

Your syntax is :

do f(a,b):
	a block

	passes block as the last parameter of f.
	I don't like it because it hides stuff.

I'd write :

f(a,b,@>,@>):
	"""a very
large multi-line
string"""
	def (x):
		print x

	Here the @> is a symbol (use whatever you like) to indicate "placeholder  
for something which is on the next line".
	Indentation indicates that the following lines are indeed argument for  
the function. The : at the end of the function call is there for coherence  
with the rest of the syntax.
	Notice that, this way, there is no need for a "do" keyword, as the code  
block created by an anonymous def() is no different that the other  
parameter, in this case a multiline string.

	This has many advantages.

	It will make big statements more readable :

	instead of :
	f( a,b, [some very big expression made up of nested class constructors  
like a form defintion ], c, d )

	write :
	f( a, b, @>, c, d ):
		[the very big expression goes here]

	So, independently of code blocks, this already improves the readability  
of big statements.
	You could also use named parameters (various proposals):

	f( a,b, c=@>, d=@> ):
		value of c
		value of d

	or :

	f( a,b, @*> ):
		value of c
		value of d

	f( a,b, @**> ):
		c: value of c
		d: value of d

	Notice how this mimics f( a,b, * ) and f(a,b, ** ) for multiple  
arguments, and multiple named arguments. Do you like it ? I do. Especially  
the named version where you cant' get lost in the param block because you  
see their names !

	Now if you say that def returns the defined function as a value, you  
don't need a do keyword.

So, for instance :

def withfile( fname, thunk, mode = "r" ):
	f = open( fname, mode )
	thunk(f)
	f.close()

then :

withfile( "afile.txt", @>, "w" ):
	def (f):
		f.write( something )

Now, you may say that the def on an extra line is ugly, then just write :

withfile( "afile.txt", @>, "w" ):	def (f):
	f.write( something )

If you really like do you can make it a synonym for def and then :

withfile( "afile.txt", @>, "w" ):	do (f):
	f.write( something )

	The two ":" seem a bit weird but I think they're OK.

> 'break' and 'return' should probably not be allowed in thunks.  One

	I do think return should be allowed in a thunk. After all it's a function  
block, so why ditch useful functionality ?
	yield should also be allowed, after all why can a thunk not be a  
generator ? This would be powerful.

def withfile( fname, thunk, mode = "r" ):
	f = open( fname, mode )
	r = thunk(f)
	f.close()
	return r

val = withfile( "afile.txt", @>, "w" ):
	def (f):
		f.write( something )
		return something

	Well, it seems I have no more ideas for now.
	What do you think about all this ?

> The thunk evaluates in the same frame as the function in which it was  
> defined. This frame is accessible:

	Hm ?
	You mean like a function closure, or that local variables defined inside  
the thunk will be visible to the caller ?
	This might change a lot of things and it becomes like a continuation, are  
you going to recode stackless ?



From edcjones at comcast.net  Sat Apr 23 13:00:48 2005
From: edcjones at comcast.net (Edward C. Jones)
Date: Sat, 23 Apr 2005 13:00:48 -0400
Subject: Does numarray search for blas and lapack during installation?
Message-ID: <doqdnR9EAZG14vffRVn-gg@comcast.com>

I have a PC with Debian sid installed. I install all my Python stuff in 
/usr/local. I just installed numarray 1.3.1. Blaslite and lapacklite 
were compiled. Did the installation process search for blas and lapack?


From magoldfish at gmail.com  Sat Apr 23 22:24:43 2005
From: magoldfish at gmail.com (Marcus Goldfish)
Date: Sat, 23 Apr 2005 22:24:43 -0400
Subject: help with binary file io, perhaps with generators?
Message-ID: <5e183f3d0504231924e989ea2@mail.gmail.com>

I need to write a "fast" file reader in python for binary files structured as:

? x[0] y[0] z[0] x[1] y[1] z[1]  ?

where c[k] is the k-th element from sequence c.  As mentioned, the
file is binary -- spaces above are just for visualization.  Each
element, c[k], is a 16-bit int.  I can assume I know the number of
sequences in the file a priori.  Files are stored and processed on a
WinXP machine (in case Endian-ness matters).

I'm looking for suggestions on how to tackle this problem, and how to
design my reader class.  Or if anyone has sample code: that would be
appreciated, too.  Some questions I have to start with:

   (i) should I use generators for iterating over the file?
   (ii) how can I handle the 16-bit word aspect of the binary data?
   (iii) ultimately, the data will need to be processed in chunks of
         M-values at a time... I assume this means I need some
         form of buffered io wrapper, but I'm not sure where to start
         with this.

Thanks!
Marcus

Ps -- this seems like a general stream processing problem? if anyone
can recommend good refs (web) on stream processing....

From cameron at NOSPAMogmios.ca  Tue Apr 19 22:28:03 2005
From: cameron at NOSPAMogmios.ca (cameron)
Date: Tue, 19 Apr 2005 20:28:03 -0600
Subject: Authentication
Message-ID: <4265be26@news.accesscomm.ca>

I am new to Python so please excuse my ignorance.

Are there a nice set of libraries/modules that abstract authentication 
in a platform independent manner? I am working on an application that 
would like to be able to hook into the native authentication mechanisms 
on Linux and OpenBSD. I would like to have a uniform interface and write 
once but I am not really holding my breath.

Thanks

-Cam


From steven.bethard at gmail.com  Tue Apr 12 10:49:24 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 12 Apr 2005 08:49:24 -0600
Subject: singleton objects with decorators
In-Reply-To: <d3g822$j0a$1@news2.rz.uni-karlsruhe.de>
References: <d3e4ui$7a9$1@news2.rz.uni-karlsruhe.de>
	<ec6dnbne_Lf_zcbfRVn-tA@comcast.com>
	<d3fskr$be8$1@news2.rz.uni-karlsruhe.de>
	<hPCdnbuFntzcHcbfRVn-hA@comcast.com>
	<d3g822$j0a$1@news2.rz.uni-karlsruhe.de>
Message-ID: <FMydnTuKhIpuQsbfRVn-uA@comcast.com>

Uwe Mayer wrote:
> Tuesday 12 April 2005 10:01 am Steven Bethard wrote:
> 
>>>I am using a class to manage configuration settings in an application.
>>>This object should only existe once so that when the user
>>>changes a setting through a configuration dialog the change imminent in
>>>all locations where access to config settings are needed.
> 
>>Ahh, I see.  I would typically just use a module in this situation,
>>where the configuration settings were just names global to the module.
>>Is there a benefit to using a singleton object over using just a module?
> 
> Basically I am using a module. The config file is stored in
> $HOME/.<app>/<app>.conf where the user can go and edit it. It is a working
> python program which globally declares variables.
> I cannot simply import this module as it does not lie in the path and I am
> not too fond of dynamically cluttering sys.path to my needs.

Hmmm...  Maybe you could use a memoized wrapper to imp.load_source? 
I've never used it, but it looks kinda like it might do what you want...

But I guess that probably doesn't really gain you too much over the 
Singleton solution...

STeVe


From issa.sidibe at epfl.ch  Mon Apr  4 06:11:23 2005
From: issa.sidibe at epfl.ch (Issa-Ahmed SIDIBE)
Date: 4 Apr 2005 03:11:23 -0700
Subject: Raise Error in a Module and Try/Except in a different Module
Message-ID: <7f285d16.0504040211.1e1b8783@posting.google.com>

I Have a function FUNC1 that is define in ModuleA. This function raise
an exception EXCP1 (raise EXCP1), with EXCP1 a global variable in
ModuleA.

In ModuleB, I have some classes that call FUNC1. I would like to catch
EXCP1 and make some processing. How can I do that.

I tried in Module B

import ModuleA
...
class():
   ...
   try: a = ModuleA.FUNC1
   except ModuleA.EXCP1: print 'catch'

But It does not work. What is wrong?


From escalation746 at yahoo.com  Mon Apr  4 11:25:05 2005
From: escalation746 at yahoo.com (robin)
Date: Mon, 04 Apr 2005 16:25:05 +0100
Subject: Python Cookbook, 2'nd. Edition is published
References: <1111973347.202875.256730@l41g2000cwc.googlegroups.com>
	<1112034526.376773.37370@f14g2000cwb.googlegroups.com>
	<IPadnWmB5ehv69XfRVn-sg@comcast.com>
	<mailman.981.1112049095.1799.python-list@python.org>
	<spnmh2-s9l.ln1@lairds.us>
Message-ID: <gpm2511dnpp924g38h4d61gtie9mffam5v@4ax.com>

Cameron Laird wrote:

>IT'S IN THERE.  The answer to all questions--well, to 
>surprisingly many questions--is in the Second Edition.
>Even questions about the Second Edition itself are
>answered therein.  So, the summary:  if in doubt, as-
>sume that the Second Edition has what you want.

It even has been known to answer questions about the Third Edition,
using the "from future" construct publishers have wanted for years.
:-)

This is a fantastic book and my single favourite Python paper
reference. It examines problems, even those which at first seem
trivial, with an unexpected rigour and invigorating sense of
adventure. Alex Martelli and the others should be congratulated.

-- robin


From fredrik at pythonware.com  Sun Apr 24 14:33:42 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 24 Apr 2005 20:33:42 +0200
Subject: when will the file be closed
References: <426BE303.3040305@mage.hu>
Message-ID: <d4goga$k4u$1@sea.gmane.org>

"Mage" <mage at mage.hu> wrote:

> The question is above: when will these file be closed?
>
> for s in file('/etc/passwd'):
>     print s
>
> file('/home/mage/test.txt','w').write('foo')

when the interpreter gets around to it.

if you want to make sure that a file is closed at a given point in
your program, you have to close it yourself.

for more on this, read the fine manual:

    http://docs.python.org/ref/objects.html

</F>





From k.robert at gmx.de  Tue Apr  5 10:12:04 2005
From: k.robert at gmx.de (Robert)
Date: 5 Apr 2005 07:12:04 -0700
Subject: "unknown protocol" error in httplib using HTTPS
Message-ID: <19804fd8.0504050612.3eca0751@posting.google.com>

did you solve this problem? It seems to be still present here with
py2.3.5.

Robert

--
From: Manish Jethani <manish.j at gmx.net>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6b)
Gecko/20031205 Thunderbird/0.4
X-Accept-Language: en-us, en
MIME-Version: 1.0
Newsgroups: comp.lang.python
Subject: "unknown protocol" error in httplib using HTTPS
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Lines: 48
Message-ID: <fohFb.3$R63.106 at news.oracle.com>
Date: Sun, 21 Dec 2003 18:44:53 +0530
NNTP-Posting-Host: 152.69.162.185
X-Trace: news.oracle.com 1072013963 152.69.162.185 (Sun, 21 Dec 2003
05:39:23 PST)
NNTP-Posting-Date: Sun, 21 Dec 2003 05:39:23 PST


I'm using Python 2.3.3 to do HTTPS using the httplib module. 
Here's the code:

   from httplib import HTTPSConnection
   con = HTTPSConnection('www-proxy', 80)
   con.set_debuglevel(1)
   con.request('GET',
     'https://nexus.passport.com:443/rdr/pprdr.asp')
   res = con.getresponse()
   print res.status, res.reason
   print res.read()

Here, "www-proxy" is the HTTPS proxy server that I have to go 
through (I can't connect directly). I'm trying to GET 
"https://nexus.passport.com:443/rdr/pprdr.asp" via the proxy, 
but I'm getting a "unknown protocol" error in return:

   File "test.py", line 9, in ?
     con.request('GET', 
'https://nexus.passport.com:443/rdr/pprdr.asp')
   File "c:\python23\lib\httplib.py", line 718, in request
     self._send_request(method, url, body, headers)
   File "c:\python23\lib\httplib.py", line 739, in _send_request
     self.endheaders()
   File "c:\python23\lib\httplib.py", line 712, in endheaders
     self._send_output()
   File "c:\python23\lib\httplib.py", line 597, in _send_output
     self.send(msg)
   File "c:\python23\lib\httplib.py", line 564, in send
     self.connect()
   File "c:\python23\lib\httplib.py", line 985, in connect 
ssl = socket.ssl(sock, self.key_file, self.cert_file)
   File "c:\python23\lib\socket.py", line 73, in ssl
     return _realssl(sock, keyfile, certfile) socket.sslerror: 
(1, 'error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown 
protocol')

What's the problem here? I just want to use SSL over my HTTPS 
proxy using httplib.

Any help.

Thanks!

Manish

-- 
http://mannu.livejournal.com/


From radam2 at tampabay.rr.com  Tue Apr  5 19:11:06 2005
From: radam2 at tampabay.rr.com (Ron_Adam)
Date: Tue, 05 Apr 2005 23:11:06 GMT
Subject: Decorator Base Class: Needs improvement.
References: <0v4351l5v1f3i9h3fssvcfklifkdlhjv7o@4ax.com>
	<43d351pq3qmlr8vlealdj818p8mt61p1ps@4ax.com>
	<mailman.1361.1112684224.1799.python-list@python.org>
	<umo551t2efp191kp4etmef5gc16241g4ej@4ax.com>
	<4252fec3@nntp0.pdx.net>
Message-ID: <n836515eaangii6035knt6uraitcbfvbkl@4ax.com>

On Tue, 05 Apr 2005 14:32:59 -0700, Scott David Daniels
<Scott.Daniels at Acm.Org> wrote:

>Ron_Adam wrote:
>> What I was referring to is the case:
>>     @decorator(x,y,z) 
>> As being a decorator expression with more than one argument.  
>But, we generally say this is a call to a function named decorator
>that returns a decorator.  If you called it:
>     @make_decorator(x,y)
>     def .....
>We'd be sure we were all on the same page.

Good point, I agree. :)

Or alternatively 
	@call_decorator(x,y)

Using either one would be good practice.

>How about this as an example:
>
>     def tweakdoc(name):
>         def decorator(function):
>	    function.__doc__ = 'Tweak(%s) %r' % (name, function.__doc__)
>	    return function
>         return decorator
>
>What is confusing us about what you write is that you are referring to
>tweakdoc as a decorator, when it is a function returning a decorator.

Bengt Richter is also pointing out there is an inconsistency in
Pythons documents in the use of decorator.  I've been trying to start
referring to the "@___" as the decorator-exression, but that still
doesn't quite describe what it does either.  Decorarator-caller might
be better. Then the decorator-function as the part that defines the
decorated-function.

Another alternative is to call the entire process what it is,
function-wrapping. Then the "@____" statement would be the
wrapper-caller, which calls the wrapper-function, which defines the
wrapped-function. That's much more descriptive to me.

If we do that then we could agree to use decorator as a general term
to describe a function as decorated. Meaning it is wrapped and get
away from the decorator/decoratoree discussions. But I think that the
terminology has been hashed out quite a bit before, so I don't expect
it to change.  I'll just have to try to be clearer in how I discuss
it.

>> and not: 
>>     @decorator(x)(y)
>
>This is only prevented by syntax (probably a good idea, otherwise
>we would see some very complicated expressions before function
>declarations).
>
>--Scott David Daniels
>Scott.Daniels at Acm.Org

And this isn't allowed either, although it represents more closely the
nesting that takes place when decorator-expressions are stacked.

@make_deco1
    @make_deco2
        @make_deco3
            def function1(n):
                n+=1
                return n


This is allowed, but its not pretty.

@make_deco1
@    make_deco2
@        make_deco3
def function1(n):
     n+=1
     return n


Cheers,
Ron




From g.brandl at gmx.net  Sun Apr  3 13:13:53 2005
From: g.brandl at gmx.net (Georg Brandl)
Date: Sun, 03 Apr 2005 19:13:53 +0200
Subject: "specialdict" module
Message-ID: <3bamhhF6j009lU1@individual.net>

Hello,

in follow-up to the recent "dictionary accumulator" thread, I wrote a
little module with several subclassed dicts.

Comments (e.g. makes it sense to use super), corrections, etc.? Is this
PEP material?

Docstrings, Documentation and test cases are to be provided later.

mfg
Georg

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

class defaultdict(dict):
    # _defaulttype: 0=no default, 1=defaultvalue, 2=defaultfactory
    __slots__ = ['_defaulttype', '_default']

    def __init__(self, *args, **kwargs):
        self._defaulttype = 0

        super(defaultdict, self).__init__(self, *args, **kwargs)

    def setdefaultvalue(self, value):
        self._defaulttype = 1
        self._default = value

    def setdefaultfactory(self, factory, *args, **kwargs):
        if not callable(factory):
            raise TypeError, 'default factory must be a callable'
        self._defaulttype = 2
        self._default = (factory, args, kwargs)

    def cleardefault(self):
        self._defaulttype = 0

    def __getitem__(self, key):
        try:
            return super(defaultdict, self).__getitem__(key)
        except KeyError:
            if self._defaulttype == 0:
                raise
            elif self._defaulttype == 1:
                return self.setdefault(key, self._default)
            else:
                return self.setdefault(key,
self._default[0](*self._default[1], **self._default[2]))

class keytransformdict(dict):
    __slots__ = ['_transformer']

    def __init__(self, *args, **kwargs):
        self._transformer = lambda x: x

        super(keytransformdict, self).__init__(self, *args, **kwargs)

    def settransformer(self, transformer):
        if not callable(transformer):
            raise TypeError, 'transformer must be a callable'
        self._transformer = transformer

    def __setitem__(self, key, value):
        super(keytransformdict, self).__setitem__(self,
self._transformer(key), value)

    def __getitem__(self, key):
        return super(keytransformdict, self).__getitem__(self,
self._transformer(key))

    def __delitem__(self, key):
        super(keytransformdict, self).__delitem__(self,
self._transformer(key))

class sorteddict(dict):
    def __iter__(self):
        for key in sorted(super(sorteddict, self).__iter__(self)):
            yield key

    def keys(self):
        return list(self.iterkeys())

    def items(self):
        return list(self.iteritems())

    def values(self):
        return list(self.itervalues())

    def iterkeys(self):
        return iter(self)

    def iteritems(self):
        return ((key, self[key]) for key in self)

    def itervalues(self):
        return (self[key] for key in self)

if __name__ == '__main__':
    x = sorteddict(a=1, b=3, c=2)

    print x.keys()
    print x.values()
    print x.items()


From bvande at po-box.mcgill.ca  Thu Apr 21 10:27:44 2005
From: bvande at po-box.mcgill.ca (Brian van den Broek)
Date: Thu, 21 Apr 2005 10:27:44 -0400
Subject: Private class?
In-Reply-To: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
References: <1114089182.676456.291810@o13g2000cwo.googlegroups.com>
Message-ID: <4267B860.8000500@po-box.mcgill.ca>

codecraig said unto the world upon 2005-04-21 09:13:
> Hi,
>   First, I come from a Java background.

<SNIP>

> ...so that is what I am thinking.  However, i guess my issue is how to
> make EventBus a singleton or prevent it from being instaniated and
> making it's methods statically accessible.
> 
> thanks.
> 

I don't come from a Java, or any other language, background, so I
cannot warrant that any of these will seem helpful to you. But there
are a lot of Singleton and Singleton-like patterns floating about.

Here's some:

<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66531>
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52558>
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/102187>
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286206>
<http://fraca7.free.fr/blog/index.php?2005/03/23/6-design-patterns-part-iii---singleton>

Best,

Brian vdB



From peter at engcorp.com  Sat Apr 16 09:15:59 2005
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 16 Apr 2005 09:15:59 -0400
Subject: ANN: Python 2.3.2 for PalmOS available
In-Reply-To: <slrnd623dv.3k0.klaus@main.szn.dk>
References: <1113608405.558884.235890@f14g2000cwb.googlegroups.com>
	<slrnd623dv.3k0.klaus@main.szn.dk>
Message-ID: <-NWdney3lduGjfzfRVn-hg@powergate.ca>

Klaus Alexander Seistrup wrote:
> lucio.torre at gmail.com wrote:
>>Some months ago i did a port of the Python2.3.2 interpreter to
>>PalmOS.
> 
> Wow, this is just what I've been waiting for.  Meanwhile I've tried
> to make do with Rexx for PalmOS, hehehe...

I've been making do (rather successfully so far) with
Plua 2 (basically Lua 5.0), which I think feels a
little closer to Python than does Rexx (but which
doesn't come, out of the box, with quite as much
power).

The main benefit is that it *does* support the Palm
OS stuff, mainly making a UI form, an event loop,
and interfacing with databases.

It would be wonderful if Python was equally well
supported (yes, I know, somebody has to do the work)
but I also suspect there's no hope of it running on
my old 2MB Palm V the way Plua currently does! :-)
Well, it would finally be a reason to upgrade though...

-Peter


From spam4bsimons at yahoo.ca  Sun Apr  3 19:44:41 2005
From: spam4bsimons at yahoo.ca (Brendan)
Date: 3 Apr 2005 16:44:41 -0700
Subject: Help me dig my way out of nested scoping
In-Reply-To: <mailman.1271.1112566684.1799.python-list@python.org>
References: <1112562768.181026.180140@l41g2000cwc.googlegroups.com>
	<mailman.1271.1112566684.1799.python-list@python.org>
Message-ID: <1112571881.900944.124470@z14g2000cwz.googlegroups.com>


>James Stroud  Apr 3, 3:18 pm:
>I think you might want to look at "python generators".

I've seen discussion of generators before, but haven't invested the
time to understand them yet.  This might be a good excuse.



From nemesis at nowhere.invalid  Mon Apr 11 15:48:07 2005
From: nemesis at nowhere.invalid (Nemesis)
Date: Mon, 11 Apr 2005 19:48:07 GMT
Subject: Python 2.4 killing commercial Windows Python development ?
References: <425a9869$0$38039$bed64819@news.gradwell.net>
Message-ID: <20050411194907.1769.17472.XPN@orion.homeinvalid>

Mentre io pensavo ad una intro simpatica "Michael Kearns" scriveva:

> I've been using python to write a simple 'launcher' for one of our Java 
> applications for quite a while now. I recently updated it to use python 
> 2.4, and all seemed well.
> Today, one of my colleagues noted that on her machine the launcher would 
> complain it was missing a DLL - msvcr71.dll

I have the same problem. But I have a doubt, does Python installer ship
this dll? 
What happens if I try to install Python2.4 on a system wich doesn't have
the dll?

-- 
The complete lack of evidence is the surest sign that the conspiracy is
working.
 
 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From lee at example.com  Sun Apr 17 16:53:58 2005
From: lee at example.com (Lee Harr)
Date: Sun, 17 Apr 2005 20:53:58 GMT
Subject: sscanf needed
References: <d3tvdd$itv$1@news2.rz.uni-karlsruhe.de>
	<d3u0d1$khc$1@news.hispeed.ch>
Message-ID: <G1A8e.1670$LX3.958@news02.roc.ny>

On 2005-04-17, Andrew E <andrew at nospam.com> wrote:
> Uwe Mayer wrote:
>> Hi,
>> 
>> I've got a ISO 8601 formatted date-time string which I need to read into a
>> datetime object.
>> Is there a shorter way than using regular expressions? Is there a sscanf
>> function as in C?
>
> in addition to the other comments...
>
> I like re, because it gives me the most control. See below.
>
>
> import re
> import datetime
>
> class Converter:
> 	
> 	def __init__( self ):
> 		self.isoPattern = re.compile( "(\d\d\d\d)-(\d\d)-(\d\d)[tT
> ](\d\d):(\d\d):(\d\d)" )
> 		
> 	def iso2date( self, isoDateString ):
> 		match = self.isoPattern.match( isoDateString )
> 		if not match: raise ValueError( "Not in ISO format: '%s'" %
> isoDateString )
> 		
> 		return datetime.datetime(
> 			int(match.group(1)),
> 			int(match.group(2)),
> 			int(match.group(3)),
> 			int(match.group(4)),
> 			int(match.group(5)),
> 			int(match.group(6))
> 			)
>
> c = Converter()
>
>
> def demo( iso ):
> 	try:
> 		date = c.iso2date( iso )
> 		print "Input '%s' -> datetime: %s" % ( iso, date )
> 	except ValueError, e:
> 		print str(e)
> 		
> demo( "2005-04-21T12:34:56" )
> demo( "2005-04-21 12:34:57" )
> demo( "2005-04-2 12:34:57" )
>
>


That's nice. We should get some code in to the module
so that it is simple to round-trip the default datetime
timestamps.


From steve at holdenweb.com  Fri Apr  8 01:42:18 2005
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 08 Apr 2005 01:42:18 -0400
Subject: curious problem with large numbers
In-Reply-To: <4255cd93$1@nntp0.pdx.net>
References: <723eb693050407124816431b6a@mail.gmail.com>	<mailman.1512.1112915956.1799.python-list@python.org>
	<4255cd93$1@nntp0.pdx.net>
Message-ID: <d355eq$na7$1@sea.gmane.org>

Scott David Daniels wrote:
> Terry Reedy wrote:
> 
>> On my Windows machine with 2.2.1, I get exactly what you expected:
>>
>>>>> 1e10000
>>
>> 1.#INF
>> ...
>> If you get wrong behavior on a later version, then a bug has been 
>> introduced somewhere, even perhaps in VC 7, used for 2.4.
> 
> 
> Nope, it is also there for 2.3.4 (May 25 2004, 21:17:02).  This is not
> necessarily a bug in the sense of a fixable bug; floating point has
> vagaries that are not necessarily easily controllable from the C source
> side.

While this may be true, it's pretty strange that Michael Spencer reports 
apparently correct results on Windows 2.3.3 and 2.4, and I confirm the 
Windows 2.4 result on my own system, while you report that 2.3.4 gives 
an error. Or isn't that what you are reporting?

A further Windows data point from Cygwin:

Python 2.4 (#1, Dec  4 2004, 20:10:33)
[GCC 3.3.3 (cygwin special)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
  >>> 1e10000
Inf
  >>>

regards
  Steve
-- 
Steve Holden        +1 703 861 4237  +1 800 494 3119
Holden Web LLC             http://www.holdenweb.com/
Python Web Programming  http://pydish.holdenweb.com/



From cam.ac.uk at mh391.invalid  Sat Apr 30 09:31:08 2005
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 30 Apr 2005 14:31:08 +0100
Subject: Best way to parse file into db-type layout?
In-Reply-To: <fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>
References: <cis2715rq97gb4taalf81ab33qmif2r4qr@4ax.com>
	<d4s01i$fbh$1@gemini.csx.cam.ac.uk>
	<7v1371pn9gvsh52m7nld6ddjm9b9k3elgf@4ax.com>
	<d4uc1r$nfs$1@gemini.csx.cam.ac.uk>
	<v2e571d3tjkg25n2k2vbbej3hfnku0a6kv@4ax.com>
	<d4ugm6$3r2$1@gemini.csx.cam.ac.uk>
	<a0j571d3qkd1csavlcdp9t4rhl6hv15sc5@4ax.com>
	<d4vn0s$i3b$1@gemini.csx.cam.ac.uk>
	<fnp6711cu6m6d7uitbdqsb9jh0bloql1ep@4ax.com>
Message-ID: <d501b0$9af$1@gemini.csx.cam.ac.uk>

John Machin wrote:

>>>>That's nice. Well I agree with you, if the OP is concerned about embedded
>>>>CRs, LFs and ^Zs in his data (and he is using Windows in the latter case),
>>>>then he *definitely* shouldn't use fileinput.
>>>
>>>And if the OP is naive enough not to be concerned, then it's OK, is
>>>it?
>>
>>It simply isn't a problem in some real-world problem domains. And if there
>>are control characters the OP didn't expect in the input, and csv loads it
>>without complaint, I would say that he is likely to have other problems once
>>he's processing it.
> 
> Presuming for the moment that the reason for csv not complaining is
> that the data meets the csv non-spec and that the csv module is
> checking that: then at least he's got his data in the structural
> format he's expecting; if he doesn't do any/enough validation on the
> data, we can't save him from that.

What if the input is UTF-16? Your solution won't work for that. And there
are certainly UTF-16 CSV files out in the wild.

I think at some point you have to decide that certain kinds of data
are not sensible input to your program, and that the extra hassle in
programming around them is not worth the benefit.

> There is also an "on principle" element to it as well -- with
> fileinput one has to use the awkish methods like filelineno() and
> nextfile(); strikes me as a tricksy and inverted way of doing things.

Yes, indeed. I never use those, and would probably do something akin to what
you are suggesting rather than doing so. I simply enjoy the no-hassle
simplicity of fileinput.input() rather than worrying about whether my data
will be piped in, or in file(s) specified on the command line.
-- 
Michael Hoffman


From smokerdude66 at myway.com  Thu Apr 28 13:22:25 2005
From: smokerdude66 at myway.com (MC05)
Date: Thu, 28 Apr 2005 10:22:25 -0700
Subject: Ron Grossi: God is not a man
References: <1114098221.580669.86300@g14g2000cwa.googlegroups.com>
	<1114127633.859113.292290@l41g2000cwc.googlegroups.com>
	<#2tJ0r3RFHA.3664@TK2MSFTNGP15.phx.gbl>
	<1114328806.147822.64660@z14g2000cwz.googlegroups.com>
	<1114329202.229148.82550@o13g2000cwo.googlegroups.com>
	<1114654290.690332.155200@f14g2000cwb.googlegroups.com>
	<ueXTQC8SFHA.3184@TK2MSFTNGP15.phx.gbl>
	<3dc8hjF6s5i2uU1@individual.net>
	<#jF1aVBTFHA.3176@TK2MSFTNGP09.phx.gbl>
Message-ID: <3dckh4F6pqjbiU1@individual.net>


"Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
news:%23jF1aVBTFHA.3176 at TK2MSFTNGP09.phx.gbl...
> MC05 wrote:
> > "Donald L McDaniel" <donmcdaniel2005 at yahoo.com> wrote in message
> > news:ueXTQC8SFHA.3184 at TK2MSFTNGP15.phx.gbl...
> >>
> >> 4) I doubt seriously whether God plays a guitar, since guitars are
> >> made by men, for men.  His Son could theoretically play a guitar.
Perhaps
> >> He does. Perhaps He doesn't.  Only the Father and His Holy
> >> Angels know.
> >
> > So then Lucifer was a wicked bass player whose sex and drugs and rock
> > n roll alientated the rest of the band and was fired?
>
> 1) Lucifer was an angel who rebelled against God, not a member of a human
> rock 'n roll band.
> 2) Since Lucifer is an angel, I doubt seriously whether he can play a bass
> guitar or other musical instrument. As I said in my last post, musical
> instruments are made by men for men, not angels.
> 3) Since Lucifer is an angel, he does not engage in sexual relations.
> (Christ tells us that angels don't engage in sexual relations by His Own
> Words.)
> 4) Drugs and rock 'n roll are created by men for men, not angels.  And the
> green plants of the Earth were created by a Gracious God for His beloved
> creations, the men of the Earth.
> 5) Lucifer was not a member of a rock 'n roll band.  He is a spirit, not a
> man.
> 6) While we are on the subject of rock 'n roll, any such band which
contains
> horns is pure crap anyway (or seriously living in the dark ages).  Horns
> don't belong in rock 'n roll bands.  Rock 'n roll has advanced light-years
> beyond Elvis.  It is the 21st Century, not the 20th.
>
As it is the 21st Century one would think your beliefs as outlined and
enumerated would be considered even MORE "dark age" than horns in rock n
roll.




From k04jg02 at kzoo.edu  Fri Apr  8 08:52:36 2005
From: k04jg02 at kzoo.edu (Joseph Garvin)
Date: Fri, 08 Apr 2005 12:52:36 +0000
Subject: Installing Python 2.4 on Linux
In-Reply-To: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
References: <BjD4e.4274$44.2770@newsread1.news.atl.earthlink.net>
Message-ID: <42567E94.70603@kzoo.edu>

Another solution is to just install 2.4 and then make an alias for
yum='/usr/bin/python2.3 yum' or whatever the path is :)

Edward Diener wrote:

> I can install Python 2.4 on the Fedora 3 Linux system, but after I do
> a number of Linux utilities and commands, like yum, stop working
> because they were dependent on the Python 2.3 installation. What
> happens is that Python 2.4 replaces the /usr/bin/python module with
> the Python 2.4 version. If I replace /usr/bin/python with the Python
> 2.3 version executable, which is still on my system, that all the
> aforesaid modules depend on, they start working again, but I can no
> longer execute modules, like IDLE, which was part of my Python 2.4
> distribution.
>
> What is the solution to this ? The operating system was installed with
> Python 2.3 and the development libraries but no tools, doc, or
> otherwise. I have installed Python 2.4 with all the RPMs and copied
> down the Python 2.4 documentation to my machine ( since
> python24-docs.rpm gives one very little ). I would naturally like to
> use Python 2.4 without killing all the commands that depend on Python
> 2.3. No doubt these commands have their modules in the site libraries
> for Python 2.3. Of course I would love to update these dependencies to
> use Python 2.4 but newer RPMs for these commands do not exist.
>
> I do not know whether this is a Python problem or a Fedora 3 problem
> but I thought I would ask here first and see if anybody else had the
> same problem. I imagine the problem might exist on other Linux systems.




From sector119 at gmail.com  Sun Apr 24 07:04:43 2005
From: sector119 at gmail.com (sector119)
Date: 24 Apr 2005 04:04:43 -0700
Subject: optparse: store callback return value
Message-ID: <1114340683.593168.148310@g14g2000cwa.googlegroups.com>

Hi

I use optparse with callback action, my callback function return some
value, but optparse does not store this value, options.callback_dest
always is None.

How can I store callback function return value or callback option value
like store action do?

I modify optparse.py Option::take_action def and add there:

value = self.callback(self, opt, value, parser, *args, **kwargs) or
value
setattr(values, dest, value)

as for STORE_ACTIONS. but I do not like to do it like this :/ Why
optparse does not do it, store return or option value, this way?



From fredrik at pythonware.com  Thu Apr 21 10:54:34 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 16:54:34 +0200
Subject: How can I verify that a passed argument is an interible
	collection?
References: <d_O9e.98440$cg1.30964@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <d48eit$a5u$1@sea.gmane.org>

Charles Krug wrote:

> I'm working on some methods that operate on (mathematical) vectors as
> in:
> 
> def Convolution(x, y)
> """Returns a list containing the convolution of vectors x and y"""
> 
> Is there any way to determine at runtime that x and y are iterible
> collections?
> 
> Do I *coughs* simply *coughs* trap the exception created by:
> 
>    for v in x:
> 
> when v is a scaler quantity?

why not leave trapping exceptions to whoever uses your function?

</F>



From m at m.com  Wed Apr 27 10:07:56 2005
From: m at m.com (monkey)
Date: Wed, 27 Apr 2005 22:07:56 +0800
Subject: Which IDE is recommended?
References: <426f90ac$1_2@rain.i-cable.com>
	<mailman.2573.1114609281.1799.python-list@python.org>
Message-ID: <426f9cbb$1_3@rain.i-cable.com>

> What about eric?

Good, it seem a very capable ide. But it require qt and for linux only?
(can't find the system requirement)

> I have been using PyDev for some time, but i think it is not always very
> handsome (e.g. writing a 5-line script in vim needs less time than
> eclipse startup ;-) otoh, for 5line scripts i am using vim anyway...

Yes, eclipse really eat my ram out....




From fredrik at pythonware.com  Thu Apr 21 14:30:56 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 21 Apr 2005 20:30:56 +0200
Subject: __del__ and reference count problem
References: <97O9e.70365$mL3.4834342@phobos.telenet-ops.be>
	<1114107504.036833.109360@z14g2000cwz.googlegroups.com>
Message-ID: <d48r8h$ov3$1@sea.gmane.org>

ajikoe at gmail.com wrote:

> Your problem can be simplified :
> 
> class A:
>  pop = 11
>  def __del__(self):
>    print A.pop
> 
> if __name__ == '__main__':
>  objA = A()
> 
> Exception exceptions.AttributeError: "'NoneType' object has no
> attribute 'pop'" in <bound method A.__del__ of <__main__.A instance at
> 0x01474A08>> ignored
> 
> I got the same error message, and I don't know why ? it looks like the
> class variable can't be accessed from __del__?

when Python shuts down, modules are sometimes cleaned out before objects
created from classes in those modules.  if you really need to access a global
object during finalization, you have to hold on to it yourself.

    def __del__(self, A=A):
        print A.pop

(the best solution is to avoid using finalizers, of course, but that's another story)

</F>



From MichaelMurdock at gmail.com  Mon Apr 11 19:39:15 2005
From: MichaelMurdock at gmail.com (Michael)
Date: 11 Apr 2005 16:39:15 -0700
Subject: I've broken PythonWin2.4 - Dialogs don't pop up!
In-Reply-To: <MPG.1cbefb05fd509d27989685@news-server>
References: <1112815685.437815.285680@f14g2000cwb.googlegroups.com>
	<MPG.1cbefb05fd509d27989685@news-server>
Message-ID: <1113262755.407761.92730@f14g2000cwb.googlegroups.com>

Rebooting does not help. I uninstalled and removed everything from
c:\python2.4 and then downloaded and installed the latest version.
Right after installing it, everything worked fine. But when I rebooted,
the problem came back. Sigh...

~Michael.



From kay.schluehr at gmx.net  Sat Apr 16 17:09:49 2005
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 16 Apr 2005 14:09:49 -0700
Subject: pre-PEP: Suite-Based Keywords
References: <Pine.A41.4.61b.0504151620430.36348@dante74.u.washington.edu>
	<42607b0f$1_2@newspeer2.tds.net>
	<mailman.1997.1113635188.1799.python-list@python.org>
	<F1e8e.57771$gJ1.1813045@weber.videotron.net>
Message-ID: <1113685789.186307.186960@o13g2000cwo.googlegroups.com>

Nicolas Fleury wrote:

> Shane Hathaway wrote:
> > I like this PEP a lot, but your concern is valid.  Maybe Brian
could
> > modify the PEP slightly to disambiguate.  How about using an
ellipsis in
> > the argument list to signify suite-based keywords?  Examples:
> >
> > f(...):
> >     x = 1
> >
> > class C(object):
> >    x = property(...):
> >       doc = "I'm the 'x' property."
> >       def fget(self):
> >          return self.__x
> >       def fset(self, value):
> >          self.__x = value
> >       def fdel(self):
> >          del self.__x
> >
> > d = dict(...):
> >     a = 1
> >     b = 2
> >
> > Using an ellipsis in a statement that would begin a different kind
of
> > block is illegal and generates a syntax error.  Note that this
usage
> > seems to fit well with the definition of "ellipsis".
> >
> > http://dictionary.reference.com/search?q=ellipsis
> >
> > Shane
>
> I like the ellipsis syntax a lot, it greatly helps the proposal IMHO.
>
> Regards,
> Nicolas

I think the usage of the block is still limited in Shawns answer. Kents
objection can be evaded but Reinhold Birkenfelds remains valid.

The statement

f(...):
  x = 1

is still not an expression like f(x=1) is. I think one has to mark
somehow the scope of the suite-based keywords.

In the examples below we can identifiy the expression belonging to f
without ambiguities and restrictions.

f(y=0,..)
   .. x = 1

if f(y=2,..) == 1:
   .. x = 5
      def g(a):
          a**2-1
   return 8

Note that the colon after f has vanished as expected for a call.

Ciao,
Kay



From greg.lindstrom at novasyshealth.com  Fri Apr  8 11:26:19 2005
From: greg.lindstrom at novasyshealth.com (tuba_ranger)
Date: 8 Apr 2005 08:26:19 -0700
Subject: Interpreter problem
References: <425684F8.5060507@novasyshealth.com>
	<mailman.1538.1112970334.1799.python-list@python.org>
Message-ID: <1112973979.536233.278780@l41g2000cwc.googlegroups.com>

Yes!  I moved the file (which I had created on a windows box using a
mounted drive), created a new one on the Linux box, typed in the
shabang in Linux, then copied the old file (sans shabang) to the new
file.  It runs like a champ.  My sysadmin suggests we run all of our
files through dos2unix before they are moved to production. We both
imagine that we would have the same problem with our Perl scripts as
well.

It's odd that deleting the line and reentering it on the Linux box did
not correct the problem.  Perhaps vim recognized the format as having
cr-lf and inserted it even though I was editing on Linux.

Anyhow, it would have been a long time before I got this one.  Thanks.



From dbasch at yahoo.com  Tue Apr 26 17:58:56 2005
From: dbasch at yahoo.com (Derek Basch)
Date: 26 Apr 2005 14:58:56 -0700
Subject: List comprehension and FieldStorage
Message-ID: <1114552736.288675.248070@g14g2000cwa.googlegroups.com>

Given this FieldStorage object:

FieldStorage(None, None, [MiniFieldStorage('Checkbox1', 'on'),
MiniFieldStorage('Checkbox2', 'on')])

I am trying to cgi.urlencode the FieldStorage object to POST to another
cgi script. The documentation for urlencode,
http://docs.python.org/lib/module-urllib.html , says that urlencode
takes a mapping object or a list of double tuples. I see that I could
use cgi.parse_qs and cgi.parse_qsl to create these object types. Should
I just use that or should I continue using FieldStorage? Also how would
I create an object of either type from a FieldStorage object? Here is
my attempt at creating the double tuple list (It sucks....I know):

print [(key, value) for key, value in form.keys() and form[key].value]

Thanks for the help,
Derek Basch



From chad at zetaweb.com  Wed Apr 27 10:32:33 2005
From: chad at zetaweb.com (Chad Whitacre)
Date: Wed, 27 Apr 2005 10:32:33 -0400
Subject: parse tree has symbols not in the grammar?
In-Reply-To: <d4ncag$ill$1@sea.gmane.org>
References: <d4n2c7$sj1$1@sea.gmane.org> <d4ncag$ill$1@sea.gmane.org>
Message-ID: <d4o7gn$ce4$1@sea.gmane.org>

Terry,

Thanks for the reply.

> Did you not find them in grammar.txt, which you referenced, or 
> Grammar/Grammar is the source, which you did not.

I didn't find them in grammar.txt. I didn't find Grammar/Grammar because 
I was looking in an installed Python rather than the source (my mistake; 
I've found it now). I assumed that the two would the same.


> Guido has said that the 
> grammar in the ref manual, meant for human consumption, is equivalent to 
> but not quite the same as the grammar used to generate the parser, which 
> has to meet LL1 constraints.

Ok, thanks for the info. While I found a comment re: the ref manual 
being for human consumption[1], I didn't take this to mean that its 
grammar was actually not the same as the implementation grammar, only 
that it was set forth in English (hence, my assumption above).

Would there be any value, I wonder, in posting Grammar/Grammar with the 
rest of the docs, e.g., at doc/ref/grammar-parser.txt?

Thanks again for the sanity check!



chad

----------

[1] http://python.org/doc/ref/introduction.html



From edvard+news at majakari.net  Fri Apr 22 01:43:36 2005
From: edvard+news at majakari.net (Edvard Majakari)
Date: Fri, 22 Apr 2005 08:43:36 +0300
Subject: Design advice for unit test asserters
References: <1114085180.425079.302580@z14g2000cwz.googlegroups.com>
Message-ID: <874qdzpdrr.fsf@titan.staselog.com>

"Gary" <gfyho at yahoo.com> writes:

[ py.test ad follows :) ]

>      def test_SomeTest(...):
>          ...
>          self.AssertAllFilesExist(fileList)
>
> or
>
>      def test_SomeTest(...):
>          ...
>          [ self.AssertFileExists(f) for f in fileList ]

I prefer the latter, because then you'd get error for the missing file -
otherwise you'd just know a file didn't exist (but not which, unless you
explicitly coded that in, no?)

with py.test you could just write:


     def file_exists(fname):
        assert os.path.isfile(fname)

     def test_file_exists():

        for f in fileList:
            yield file_exists, f

that way you'd generate a separate test for each file in fileList, and easily
see which file would fail the test. :)

no comment for the rest of your posts though - I'm still learning how to
create good unit tests myself (and I also see you're using standard unit test
modules - I'm already seduced by the no-API py.test library...)

-- 
# Edvard Majakari		Software Engineer
# PGP PUBLIC KEY available    	Soli Deo Gloria!

$_ = '456476617264204d616a616b6172692c20612043687269737469616e20'; print
join('',map{chr hex}(split/(\w{2})/)),uc substr(crypt(60281449,'es'),2,4),"\n";


From gabriel.birke at gmail.com  Sun Apr 17 15:50:58 2005
From: gabriel.birke at gmail.com (Gabriel Birke)
Date: 17 Apr 2005 12:50:58 -0700
Subject: Accessing multidimensional lists with an index list
Message-ID: <32903d4e.0504171150.73b7feb0@posting.google.com>

Given the multidimensional list l:
l = [ {'v1': 1, 'v2': 2},
	  [ {'v1':4, 'v2': 7},
	    {'v1': 9, 'v2': 86},
		[ {'v1': 77, 'v2': 88}]
	  ]
	 ]

I want to access specific items the indices of which are stored in
another list. For now, I created a function to do this:

def getNestedValue(l, indices):
	while len(indices) > 0:
		i = indices.pop(0)
		l = l[i] #In future versions, put error checking here
	return l

print getNestedValue(l, [1, 2, 0])
print getNestedValue(l, [1, 1])

Is there a more elegant or performant language construct to accomplish
my task?


From fredrik at pythonware.com  Mon Apr 11 11:40:16 2005
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 11 Apr 2005 17:40:16 +0200
Subject: zlib and zipfile module in Python2.4
References: <425a8caf$1_1@127.0.0.1>
Message-ID: <d3e5j8$t3e$1@sea.gmane.org>

Alan Toppen wrote:

> When running my Python script it gives a warning:
>
> /usr/local/lib/python2.4/zipfile.py:7: RuntimeWarning: Python C API
version
> mismatch for module zlib: This Python has C API version 1012, module zlib
> has version 1011.
>   import zlib # We may need its compression method

that's usually a non-critical warning.

> But it works. Python 2.2 and 2.3 handle zipfiles out of the box. Could a
> file have been omitted from Python 2.4 by accident?

from your Python 2.4 build, perhaps.

Python 2.4 itself definitely supports zlib/zipfile.  e.g.

    Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)]
    on win32
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import zlib
    >>> import zipfile

I suggest checking with whoever built Python for you.

</F>





From quantumcheesedog at gmail.com  Wed Apr  6 19:57:03 2005
From: quantumcheesedog at gmail.com (python newbie)
Date: Wed, 06 Apr 2005 23:57:03 GMT
Subject: Harvestman install not working
References: <JgR4e.2961$qD2.2299@newssvr14.news.prodigy.com>
	<1112811970.231676.122830@g14g2000cwa.googlegroups.com>
Message-ID: <jH_4e.19545$zl.4511@newssvr13.news.prodigy.com>

Thanks Anand, (both for writing Harvest,  and for the reply.)
By the way, I did try that, so that the command is:

c:\python23\python.exe install.py py2exe -O2 --packages=encodings

And this time the dist folder was created, but there were only these files
in there:

library.zip
python23.dll
unicodedata.pyd
w9xpopen.exe
zlib.pyd
_sre.pyd

I'll keep trying though.


"Anand" <abpillai at gmail.com> wrote in message
news:1112811970.231676.122830 at g14g2000cwa.googlegroups.com...
> Hi
>
>    Latest version of py2exe does not support the option
> --force-imports anymore I think. You can edit the .bat file to remove
> that option. It should work.
>
> -Anand
>





From radam2 at tampabay.rr.com  Thu Apr 21 14:52:49 2005
From: radam2 at tampabay.rr.com (Ron)
Date: Thu, 21 Apr 2005 18:52:49 GMT
Subject: goto statement
In-Reply-To: <116fhmd75m1a00a@corp.supernews.com>
References: <20050420092359.81900.qmail@web8409.mail.in.yahoo.com>
	<mailman.2159.1113989175.1799.python-list@python.org>
	<Xns963E3180496D3castleamber@130.133.1.4>
	<3cmtgvF6q13cvU1@individual.net>
	<dl7kj2-e6n.ln1@eskimo.tundraware.com> <d484fd$ch1$2@n6.co.ru>
	<116fbo3pma1lsdb@corp.supernews.com> <d48eov$ddn$2@n6.co.ru>
	<116fg649v5rsf14@corp.supernews.com> <d48g6q$f66$1@n6.co.ru>
	<116fhmd75m1a00a@corp.supernews.com>
Message-ID: <5ES9e.10174$5f.2092@tornado.tampabay.rr.com>

Grant Edwards wrote:
> On 2005-04-21, Sergei Organov <osv at javad.ru> wrote:
> 
> 
>>>>>>Well, I'm writing for embedded realtime systems in C/C++ and
>>>>>>have never encountered a single need to use goto.
>>>>>
>>>>>I have encountered situations in C programs where the best
>>>>>thing to use was a goto.  Those situations have always been
>>>>>handled beutifully by a "raise" in Python.
>>>>
>>>>setjmp/longjump?
>>>
>>>I've always found setjmp/longjmp much more confusing and hard
>>>to maintain than a simple goto.  It also requires library
>>>support that goto doesn't.
>>
>>Agreed. The 'goto error' idiom is in fact the only goto usage
>>I do agree with provided there is no support for exceptions,
>>but that's not applicable to Python anyway.
> 
> 
> Exactly.  I've been writing C code for 20+ years, and the only
> problems where I found goto to be a good solution are the ones
> where exceptions are even better solutions in Python.  I've
> never found myself wishing for a goto when writing Python code.

I can remember in the early apple2+ days of trying to untangle code 
written by others with liberal use of gotos and no clear program 
structure.  A non trivial task that often meant it was easier to start 
over than to modify someone elses program. Determining the context of a 
statement often required snaking through several dozen gotos with 'line 
number's to find out what a particular section of code actually did. 
Making changes to such code could be difficult and often had unintended 
consequences.

The if, elif, else, functions, and while statements are the replacements 
for goto's.  And they make the code much more readable and 
understandable than something like ...

         100 PRINT "HELLO"
         105 INPUT ">> ";S$	
	110 IF S$ = "GOODBYE" THEN GOTO 140
         115 IF S$ = "HOW ARE YOU" THEN GOTO 150
         130 GOTO 100
         140 PRINT "GOODBYE"
         145 GOTO 200
         150 PRINT "I'M FINE"
         160 GOTO 105
         200 REM CONTINUE

LOL, I HAD TO... Oops caps...  look up apple soft basic to remember what 
I couldn't do.  Part of the reason for the spaghetti code was that with 
line numbers it's easier to tack on something to the end than it is to 
change all the line numbers if you didn't allow for room.  I for one, 
don't miss goto's or line numbers!  ;-)

Apple Soft Quick Refrence -
	http://www.cosmicwolf.com/AppleII/applesoft_basic.htm

Cheers,
Ron


From martin at v.loewis.de  Mon Apr 11 17:56:59 2005
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 11 Apr 2005 23:56:59 +0200
Subject: Python 2.4 killing commercial Windows Python development ?
In-Reply-To: <425aa0fb$0$38041$bed64819@news.gradwell.net>
References: <425a9869$0$38039$bed64819@news.gradwell.net>
	<is2tmhzk.fsf@python.net>
	<425aa0fb$0$38041$bed64819@news.gradwell.net>
Message-ID: <425AF2AB.1030401@v.loewis.de>

Michael Kearns wrote:
> There are a few problems with this as I see it. In theory, the 'cost' of
> MSVC 7.1 shouldn't be a problem for a big organisation. However, I
> wouldn't expect to have to go and buy it purely because I'm developing
> (perhaps) a shareware application using python - this isn't my case, but
> I wasn't looking at it from just a big organisation perspective.

For developers that need msvcr71.dll on the target system which don't
have a license to distribute it, the solution is simple: they just need
to advise their users to install python-2.4.1.msi. This comes with
msvcr71.dll included.

Regards,
Martin


From jjreavis at gmail.com  Mon Apr 18 17:40:12 2005
From: jjreavis at gmail.com (Jeff  Reavis)
Date: 18 Apr 2005 14:40:12 -0700
Subject: Tiny fonts in wxPython app
In-Reply-To: <42641a4f_2@news.arcor-ip.de>
References: <42641a4f_2@news.arcor-ip.de>
Message-ID: <1113860411.942144.54520@g14g2000cwa.googlegroups.com>

Sven,
It may be the default gtk font settings. This can be changed in the
.gtkrc file.

-jjr



From brian at rk-speed-rugby.dk  Thu Apr 28 10:02:16 2005
From: brian at rk-speed-rugby.dk (Brian Elmegaard)
Date: 28 Apr 2005 16:02:16 +0200
Subject: pyqt and Eric 3
References: <MPG.1cda1800975d5139989680@news2.atlantic.net>
	<1114679217.996943.17730@f14g2000cwb.googlegroups.com>
Message-ID: <u4qdrgftj.fsf@rk-speed-rugby.dk>

lbolognini at gmail.com writes:

> http://kscraft.sourceforge.net/convert_xhtml.php?doc=pyqt-windows-install.xhtml

Which, afaics, unfortunately requires either that you have msvc or
that you compile python and every addon with mingw :-(

-- 
Brian (remove the sport for mail)
http://www.et.dtu.dk/staff/be/be.html


From jerf at jerf.org  Fri Apr  1 17:42:30 2005
From: jerf at jerf.org (Jeremy Bowers)
Date: Fri, 01 Apr 2005 17:42:30 -0500
Subject: that is it is not it (logic in Python)
References: <424d0be1$0$2882$626a14ce@news.free.fr>
	<mailman.1199.1112380840.1799.python-list@python.org>
	<424dc4b4$0$18707$636a15ce@news.free.fr>
Message-ID: <pan.2005.04.01.22.42.30.441348@jerf.org>

On Fri, 01 Apr 2005 22:01:25 +0000, F. Petitjean wrote:

> Le Fri, 1 Apr 2005 13:39:47 -0500, Terry Reedy a ?crit :
>> This is equivalent to '(that is it) and (it is not it)' which is clearly 
>> false.
>> 
>>> False   # What ?
>> 
>> Reread the ref manual on chained comparison operators.
>
> And see the date of the post :-)
> that is it  isn't it ?

Nope, nothing to do with it. Read the ref manual on chained comparision
operators.

http://www.python.org/doc/2.4/ref/comparisons.html#l2h-430

For proof, run the given code in the original post. It's not faked in the
slightest, and the manual holds the key to understanding.


From dcrespo at gmail.com  Mon Apr 11 16:57:40 2005
From: dcrespo at gmail.com (dcrespo)
Date: 11 Apr 2005 13:57:40 -0700
Subject: The convenient database engine for a "Distributed" System
Message-ID: <1113253060.465083.110780@f14g2000cwb.googlegroups.com>

Hi all...
Here is my infrastructure design of a "distributed" system:
- Many (30-50) hosts connected via VPN to a server.
- Each host manages a system that receives local data (stored in a
local database), and has to be sent to the server, so the rest of the
hosts can "see" this data.

What I want? I want to have a
portable/changeable/easy-installation/cross-platform local database.

The problem is that the database structure may change, so I have to
change the database structure of each host. As you can see, it requires
the database structure to be very portable and changeable.

I think there is 2 database paradigms to consider: The Access-like one,
and the MySQL-like one. With the Access-like paradigm, it only needs
the file .mdb on the local host, and its respectively set of dlls to
manipulate it. But, I remember that I need a cross platform database...
On the other hand, the MySQL-like paradigm, needs the database engine
to be installed for running. The cons of it, is that is more difficult
(I don't know yet if a can do it) to install it silently, I mean
without user intervention, whereas  a .mdb file being a member of the
system installation files is totally viable.

I heard about sqlite... Any comments?



From rbt at athop1.ath.vt.edu  Tue Apr 12 09:00:41 2005
From: rbt at athop1.ath.vt.edu (rbt)
Date: Tue, 12 Apr 2005 09:00:41 -0400
Subject: [perl-python] Python documentation moronicities (continued)
In-Reply-To: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
References: <1113301533.054410.203710@z14g2000cwz.googlegroups.com>
Message-ID: <d3ggpp$9fu$1@solaris.cc.vt.edu>

Xah Lee wrote:

> What does a programer who wants to use regex gets out from this piece
> of motherf**king irrevalent drivel?

Any resume that ever crosses my desk that includes 'Xah Lee' anywhere in 
the name will be automatically trashed.


From mothra at nowhereatall.com  Thu Apr 14 10:25:26 2005
From: mothra at nowhereatall.com (Mothra)
Date: Thu, 14 Apr 2005 07:25:26 -0700
Subject: Converting a perl module to a python module would it be worth it?
Message-ID: <425e7c41$1@usenet.ugs.com>

Hi All,

I am the current author of the Astro-Sunrise perl module
http://search.cpan.org/~rkhill/Astro-Sunrise-0.91/Sunrise.pm
and was wondering if it would be worth while to convert it to python.
First off, I have never programmed in python. I would like to use
this project to learn python. I was wondering if there was a
"How to program python for perl programmers" Kinda
like what is different between the two, pitfalls for perl programmers
and what not.
Another question is, if I do this where can I put the results?
As far as I know python has no "CPAN".

Thanks in advance.

Mothra




From ake.ljungbert3 at comhem.se  Wed Apr  6 14:28:47 2005
From: ake.ljungbert3 at comhem.se (ake)
Date: 6 Apr 2005 11:28:47 -0700
Subject: Compiling extensions
Message-ID: <875af5e2.0504061028.ef32a13@posting.google.com>

I would like to compile extensions usig distutils. is there a way to
set which compiler to use ?

I am using windows and VC++ 7.1 comp.

?ke


From QuotesViewer at gmail.com  Tue Apr 19 17:19:32 2005
From: QuotesViewer at gmail.com (QuotesViewer at gmail.com)
Date: 19 Apr 2005 14:19:32 -0700
Subject: Refactoring in Python.
References: <8764yiog3y.fsf@hector.domek>
Message-ID: <1113945572.931011.149970@z14g2000cwz.googlegroups.com>

Investigate the CVS histories of the few 1000s python projects
available at www.sourceforge.net

enjoy



From pinard at iro.umontreal.ca  Tue Apr  5 21:04:56 2005
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Tue, 5 Apr 2005 21:04:56 -0400
Subject: Best editor?
In-Reply-To: <d2v4b7$pb4$1@panix1.panix.com>
References: <1112725379.514651.66540@l41g2000cwc.googlegroups.com>
	<d2v4b7$pb4$1@panix1.panix.com>
Message-ID: <20050406010456.GA31984@alcyon.progiciels-bpi.ca>

[Aahz]

> Use vim.  80% of the power of emacs at 20% of the learning curve.

I used Emacs for a long while, and learned it a bit thoroughly.  I
also learned Vim mor recently, and still have many things to study.
See http://pinard.progiciels-bpi.ca/opinions/editors.html for some
(incomplete) thoughts on both, Emacs in particular.

If you do only light use of editors, both Emacs and Vim are rather easy,
despite tinily annoying for some details, each its own details :-). If
you deeply use them, they both require a lot of learning, eventually.
Emacs does a few things that are difficult in Vim, but we can usually
live without those few things, not overly missing them.  Both editors
are also extensible with Python, and Vim does Python a bit more nicely.
Overall, Vim is also cleaner than Emacs, and this pleases me.

This in between light and deep use that Aahz is most right: Vim offers
many niceties that undoubtedly require some learning, yet significantly
less than Emacs.  Emacs has a lot more knobs to adjust, which is not
always so advantageous for average users, and overkill for casual users.

Whatever Emacs or Vim, learn to extend it with Python.  There, you get a
great deal of added power and flexibility for almost free, assuming and
given that you already are a Python lover.

-- 
Fran?ois Pinard   http://pinard.progiciels-bpi.ca


From harlinseritt at yahoo.com  Sun Apr 10 07:28:13 2005
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 10 Apr 2005 04:28:13 -0700
Subject: Does Tk provide ComboBox ?
In-Reply-To: <pan.2005.04.10.08.56.40.458342@gmx.at>
References: <pan.2005.04.10.07.59.15.983406@optushome.com.au>
	<pan.2005.04.10.08.56.40.458342@gmx.at>
Message-ID: <1113132493.464302.251020@g14g2000cwa.googlegroups.com>

Hi Markus,

Pmw has a ComboBox but it's ugly IMO. Tix also has one -- but it's not
much different than the Pmw one. I created one and put it in a
Tkinter.py file. You can see mine here:
http://www.seritt.org/pub/tkinter/Tkinter-03132005.py -- I can honestly
say it's almost fully functional :-)

Seriously though, you can use the Listbox for almost anything you would
need a combobox for. In my mind, it's good for tight spaces (I'm sure
someone on this fine board will add something or disagree with me),
looks and little else.

Regards,

Harlin Seritt



From steven.bethard at gmail.com  Wed Apr 13 12:05:34 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 13 Apr 2005 10:05:34 -0600
Subject: preallocate list
In-Reply-To: <d3jes1$onj$1@scotsman.ed.ac.uk>
References: <d3j4ds$njr$1@scotsman.ed.ac.uk> <d3j5t4$nqg$1@scotsman.ed.ac.uk>
	<d3j569$5tr$1@solaris.cc.vt.edu> <op.so6ehvehpda12i@localhost>
	<d3jes1$onj$1@scotsman.ed.ac.uk>
Message-ID: <86ednUIA9pjR3sDfRVn-tA@comcast.com>

Jim wrote:
> What I really want is a Numeric array but I don't think Numeric supports 
> importing files.

Hmmm...  Maybe the scipy package?

I think scipy.io.read_array might help, but I've never used it.

STeVe


From rkern at ucsd.edu  Wed Apr 27 15:42:03 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Wed, 27 Apr 2005 12:42:03 -0700
Subject: odeint function in SciPy
In-Reply-To: <1114630203.755082.285020@l41g2000cwc.googlegroups.com>
References: <1114630203.755082.285020@l41g2000cwc.googlegroups.com>
Message-ID: <d4opk6$iqe$1@sea.gmane.org>

FLChamp wrote:
> I was wondering what numerical method the odeint function is based on.
> I have checked the documentation but couldnt find anything. I would be
> very grateful if someone could answer this question for me, I'm not
> looking for a heavy mathematical answer!

You could also check the source or ask on the appropriate mailing list.

But since if you do the latter, you'll still get me, odeint uses ODEPACK.

http://www.netlib.org/odepack/opkd-sum

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From exarkun at divmod.com  Tue Apr 26 13:33:04 2005
From: exarkun at divmod.com (Jp Calderone)
Date: Tue, 26 Apr 2005 17:33:04 GMT
Subject: compile shebang into pyc file
In-Reply-To: 0
Message-ID: <20050426173304.15422.1242013379.divmod.quotient.1790@ohm>

On 26 Apr 2005 08:19:43 -0700, Joerg Schuster <joerg.schuster at gmail.com> wrote:
>Hello,
>
>is there a way to compile a python file foo.py to foo.pyc (or foo.pyo)
>such that foo.pyc can be run with 'foo.pyc' (as opposed to 'python
>foo.pyc') on the command line?
>

  No.  However, on Linux, read up on /proc/sys/fs/binfmt_misc

  Jp


From steven.bethard at gmail.com  Thu Apr 28 14:43:19 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 28 Apr 2005 12:43:19 -0600
Subject: how can I sort a bunch of lists over multiple fields?
In-Reply-To: <1114710873.292998.128090@f14g2000cwb.googlegroups.com>
References: <1114623282.855415.132040@l41g2000cwc.googlegroups.com>
	<1114634355.348110.141690@o13g2000cwo.googlegroups.com>
	<EYednbmZKbHHZ_LfRVn-gA@comcast.com>
	<1114710873.292998.128090@f14g2000cwb.googlegroups.com>
Message-ID: <COWdnd08tvdZs-zfRVn-pg@comcast.com>

googleboy wrote:
> firstly,  I am trying hard to figure out how to create a new file with
> the list rather than print to standard out.  I haev done this:
> 
>     for book in books:
>         print book # just to be sure it works as I expect
>         sort1 = open(r'D:\path to\sort1.csv', 'w+')
>         print >> sort1, book
>         sort1.close()
> 
> and this creates the file as I expect, however it creates it populated
> with only the information of the final book in the sorted list.

You're reopening the file on each iteration of the loop.  I think you 
want to open it only once, before the loop, e.g.

sort1_file = open(r'D:\path to\sort1.csv', 'w+')
for book in books:
     sort1_file.write('%s\n' % book) # same as "print >> sort1, book"
sort1_file.close()

Note that the opening and closing of the file is outside the loop.

> Secondly,  I am wondering how I can get a search algorithm that will
> search by multiple fields here,  so that I can (as one example) sort
> the books out by author and then date,  to present a list of the book
> grouped by authors and having each group presented in a chronological
> order,   or by author and title, grouping all the books up into authors
> presenting each group alphabetically by title.  Or by publisher and
> date,  or by publisher and code....
> 
> I have tried things like
> 
> books.sort(key = operator.attrgetter("author"), key =
> operator.attrgetter("title") and
> books.sort(key = operator.attrgetter("author", "title")
> 
> but they both give errors.

The problem is that operator.attrgetter only accepts a single attribute. 
  Basically, attrgetter looks something like:

     def attrgetter(attr_name):
         def func(obj):
             return getattr(obj, attr_name)
         return func

So attrgetter can't really solve your problem.  However, you can create 
a similar function that should do the job.  Something like (untested):

     def get_key(*attr_names):
         def key(book):
             return [getattr(book, name) for name in attr_names)]
         return key

Then you should be able to do something like:

     books.sort(key=get_key("author", "title"))

The trick is that the inner function, 'key', looks up a sequence of 
attributes on the book object, instead of just a single attribute like 
attrgetter does.

HTH,

STeVe


From codecraig at gmail.com  Fri Apr 22 15:08:53 2005
From: codecraig at gmail.com (codecraig)
Date: 22 Apr 2005 12:08:53 -0700
Subject: Threading question
In-Reply-To: <42694464$1_1@newspeer2.tds.net>
References: <1114193688.336893.251430@l41g2000cwc.googlegroups.com>
	<42694464$1_1@newspeer2.tds.net>
Message-ID: <1114196933.272932.50640@f14g2000cwb.googlegroups.com>

Kent,
   thanks for the idea of doSomethingThreaded....that's really cool!

thanks



From rkern at ucsd.edu  Mon Apr 25 06:17:19 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 25 Apr 2005 03:17:19 -0700
Subject: What's do list comprehensions do that generator expressions 
 don't?
In-Reply-To: <426CB5DC.1050301@freemail.gr>
References: <86ll77pgqz.fsf@guru.mired.org>	<mailman.2430.1114408769.1799.python-list@python.org>
	<426CB5DC.1050301@freemail.gr>
Message-ID: <d4ifpu$m1k$1@sea.gmane.org>

jfj wrote:
> Robert Kern wrote:
> 
>> Mike Meyer wrote:
>>
>>> Ok, we've added list comprehensions to the language, and seen that
>>> they were good. We've added generator expressions to the language, and
>>> seen that they were good as well.
>>>
>>> I'm left a bit confused, though - when would I use a list comp instead
>>> of a generator expression if I'm going to require 2.4 anyway?
> 
> If you want a list right away you'd use a list comprehension.
>  X =[i for i in something() if somethingelse()]
>  random.shuffle(X)
>  print x[23]
> 
> On the other hand it's generator expressions which should be used
> only when the code can be written in as a pipe.  For example a filter
> of a -otherwise- very long list:
> 
>   make_fractal_with_seed (x for x in range(100000000) if fibonacci_prime 
> (x))
> 
>> Never. If you really need a list
>>
>> list(x*x for x in xrange(10))
>>
>> Sadly, we can't remove list comprehensions until 3.0.
>>
> 
> Why???
> Then we should also remove:
>  x=[] to x=list()
>  x=[1,2,3] to x=list(1,2,3)

Well, that last one doesn't work. Removing the empty list literal would 
be inconsistent.

> I think "list" is useful only:
> 1) to subclass it
> 2) to convert a list/tuple/string to a list, which is
> done extremely fast.

Add "any iteratable". Genexps are iterables.

> But for iterators I find the list comprehension syntax nicer.

Possibly. I find them too similar with little enough to choose between 
them, hence the OP's question.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From steven.bethard at gmail.com  Sun Apr  3 18:19:01 2005
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 03 Apr 2005 16:19:01 -0600
Subject: text analysis in python
In-Reply-To: <mailman.1255.1112523725.1799.python-list@python.org>
References: <mailman.1255.1112523725.1799.python-list@python.org>
Message-ID: <5-SdnVL3JbhL9s3fRVn-pA@comcast.com>

Maurice Ling wrote:
> In the Java world, there is GATE (general architecture for text 
> engineering) and it seems very impressive. Are there something like that 
> for Python?

I worked with GATE this last summer and really hated it.  Can't decide 
whether that was just my growing distaste for Java or actually the GATE 
API.  Anyway, if you're looking for something like GATE that (in my 
experience) runs significantly faster, you should look at Ellogon 
(www.ellogon.org).  It's written in C and TCL, with C++, Java, Perl, and 
Python bindings.  And I believe, if you have any software already 
written for GATE, Ellogon can run those modules directly.  I've 
personally never done so -- all my modules are written in Python (often 
simple wrappers for things like MXPOST, MXTerminator, Charniak's parser, 
etc.)  I find the Python interface simple and easy to use, and they've 
added a number of my suggestions to the API in the last release.

STeVe


From rkern at ucsd.edu  Thu Apr 14 05:42:02 2005
From: rkern at ucsd.edu (Robert Kern)
Date: Thu, 14 Apr 2005 02:42:02 -0700
Subject: Python license (2.3)
In-Reply-To: <slrnd5sckl.lf2.apardon@rcpc42.vub.ac.be>
References: <slrnd5n30i.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1751.1113310691.1799.python-list@python.org>	<slrnd5nifb.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1793.1113334936.1799.python-list@python.org>	<slrnd5pemu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1818.1113375260.1799.python-list@python.org>	<slrnd5pimu.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1823.1113383437.1799.python-list@python.org>	<slrnd5pqfh.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1860.1113432730.1799.python-list@python.org>	<slrnd5s7m1.lf2.apardon@rcpc42.vub.ac.be>	<mailman.1881.1113466572.1799.python-list@python.org>
	<slrnd5sckl.lf2.apardon@rcpc42.vub.ac.be>
Message-ID: <d3ldn2$uf6$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2005-04-14, Robert Kern schreef <rkern at ucsd.edu>:
> 
>>Antoon Pardon wrote:
>>
>>>Op 2005-04-13, Robert Kern schreef <rkern at ucsd.edu>:
>>>
>>>I would do that if I were just writing code I thought others could
>>>find usefull. I then would feel no problem "burdening" those users
>>>with the same kind of license I found in the product I took some
>>>code from. But I also think that readers of documentation should
>>>be free to use any code included in any way they see fit.
>>
>>If they have issues with distributing code derived from Python, why are 
>>they reading a Python tutorial?
> 
> 
> Try and look it from a students viewpoint. He is learing languages,
> algorithms and so on. Now he is ready to write his own program.
> Chances are high that he will rely on examples from the
> courses/documentation he read. It is just not practical for someone
> like that to figure out all the possible different licenses under
> which he can use the examples from the various documenation sources.

The PSF License is about as light as they come.

> Now if this documentation refers to code from yet another source
> with its own license, using it becomes an utter nightmare for
> the student, because now he has to figure out which piece of
> the code is original from the author of the documentation and
> which was copied from the other source.

Then write your own code and don't use anyone else's. You can't offer 
extra permissions for code that's not yours.

> Consideration like this, let me come to the conclusion that
> code included with documentation should come with no strings
> attached for the students to reuse.

No such thing, really. Copyright law requires almost as much as the PSF 
license. The MIT license is shorter, possibly more easily 
understandable, but practically amounts to more-or-less the same thing.

In short, don't worry about it. Don't sue people, keep the attributions 
intact, and probably no one will care.

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter



From __peter__ at web.de  Fri Apr 29 03:10:41 2005
From: __peter__ at web.de (Peter Otten)
Date: Fri, 29 Apr 2005 09:10:41 +0200
Subject: regex over files
References: <426D0659.7080307@chamonix.reportlab.co.uk>	<426D08BC.1040703@klix.ch>	<mailman.2469.1114444689.1799.python-list@python.org>	<d4kunp$9u6$1@blackmamba.itd.rl.ac.uk>	<426E021E.8000809@jessikat.fsnet.co.uk>	<17006.31984.182979.430076@montanaro.dyndns.org>	<426E893D.2070905@chamonix.reportlab.co.uk>	<mailman.2543.1114545234.1799.python-list@python.org>	<426EAA9D.2050904@jessikat.fsnet.co.uk>	<pan.2005.04.26.21.39.15.988504@jerf.org>	<426F5B62.3010801@chamonix.reportlab.co.uk>
	<17008.19697.939514.53469@montanaro.dyndns.org>
	<mailman.0.1114733851.14961.python-list@python.org>
Message-ID: <d4smkl$7be$04$1@news.t-online.com>

Robin Becker wrote:

> #sscan1.py thanks to Skip
> import sys, time, mmap, os, re
> fn = sys.argv[1]
> fh=os.open(fn,os.O_BINARY|os.O_RDONLY)
> s=mmap.mmap(fh,0,access=mmap.ACCESS_READ)
> l=n=0
> t0 = time.time()
> for mat in re.split("XXXXX", s):

re.split() returns a list, not a generator, and this list may consume a lot
of memory.

> n += 1
> l += len(mat)
> t1 = time.time()
> 
> print "fn=%s n=%d l=%d time=%.2f" % (fn, n, l, (t1-t0))

I wrote a generator replacement for re.split(), but as you might expect, the
performance is nowhere near re.split(). For your large data it might help
somewhat because of its smaller memory footprint.

def splititer(regex, data):
    # like re.split(), but never yields the separators.
    if not hasattr(regex, "finditer"):
        regex = re.compile(regex)
    start = 0
    for match in regex.finditer(data):
        end, new_start = match.span()
        yield data[start:end]
        start = new_start
    yield data[start:]

Peter


From aleksander.helgaker at gmail.com  Wed Apr 20 11:15:02 2005
From: aleksander.helgaker at gmail.com (aleksander.helgaker at gmail.com)
Date: 20 Apr 2005 08:15:02 -0700
Subject: random number between 0 and 20
Message-ID: <1114010102.027562.150840@z14g2000cwz.googlegroups.com>

How can I generate a random number between 0 - 20 and store the number
in nrrandom?



From ruach at chpc.utah.edu  Fri Apr  8 14:49:59 2005
From: ruach at chpc.utah.edu (Matthew Thorley)
Date: Fri, 08 Apr 2005 12:49:59 -0600
Subject: Can dictionary values access their keys?
In-Reply-To: <mailman.1556.1112985817.1799.python-list@python.org>
References: <d3682h$qom$1@vegh.ks.cc.utah.edu>	<mailman.1544.1112978919.1799.python-list@python.org>	<d36fp0$suk$1@vegh.ks.cc.utah.edu>	<mailman.1555.1112983423.1799.python-list@python.org>	<d36hv6$51$1@vegh.ks.cc.utah.edu>
	<mailman.1556.1112985817.1799.python-list@python.org>
Message-ID: <d36jop$kp$1@vegh.ks.cc.utah.edu>

Steve Holden wrote:

> Indeed, they will probably just need to pass "self" as an argument to
> the child object's creator (it will become an argument to the __init__()
> method). This will be pretty cheap, since the additional attribute will
> be bound to an already-existing value.
> 
>> On the other hand, the introspecitve stuff is cool! When you say "make
>> more work for yourself" are you talking about 400 lines of code or 50.
>> Further, is there much processing required to do the magic? When python
>> do introspective magic, is it memory intensive? by that I mean does it
>> have to make copies of the objects to do the look-ups?
>>
> Frankly I am not sure I see the advantage. You seem to be saying that
> rather than provide each child object with a reference to its parent you
> would rather provide it with a reference to the collection of parent
> objects and let it work out which one it wants. Where's the benefit?
All right then.

> Happy to help, but I can't take credit for the grant, since all I did as
> a PSF director was vote affirmatively on the recommendations of Martin
> von Lowis' extremely hard-working grants committee.

Thanks to the PSF for the grant!

-Matthew


From jeremy+plusnews at jeremysanders.net  Tue Apr 19 08:05:21 2005
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Tue, 19 Apr 2005 13:05:21 +0100
Subject: ANN: Veusz 0.5 - a scientific plotting package
References: <mailman.2027.1113746240.1799.python-announce-list@python.org>
	<mailman.2036.1113789043.1799.python-list@python.org>
	<1113810917.134164.113060@g14g2000cwa.googlegroups.com>
	<pan.2005.04.18.10.10.58.36795@jeremysanders.net>
	<1113856809.069302.17250@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2005.04.19.12.05.21.607204@jeremysanders.net>

On Mon, 18 Apr 2005 13:40:09 -0700, jdh2358 wrote:

> I'll start by saying that I for one won't criticize you for rolling you
> own plotting package rather than join forces with an existing project.
> I've been accused of the same, on more than one occasion :-)  But I'm also
> aware of the problem that this creates -- the tyranny of choice. python is
> so fun to code in that many developers are looking for a reason to find an
> existant package inadequate so they have an excuse to write their own
> replacement.  Hence we have a proliferation of web-app frameworks,
> plotting packages, array objects and so on.  There is a lot of duplicated
> effort in many arenas and it would be nice to collaborate more.

True. It's sad that it's just more fun to go off and write something
yourself, but it is fun :-)  I'm afraid I'm not very good with using other
people's codebases.

> I read over your scipy list of problems that you found in matplotlib --
> some were helpful and some, as you note, have been long fixed.  One
> critique you might flesh out for me is the notion that matplotlib's object
> model is baroque -- most of the developers feel the object model is fairly
> solid.  You weren't by chance, trying to use the procedural pylab (aka
> matlab) interface, were you, since pylab itself is just a wrapper of the
> OO matplotlib API?  One area in the object model that we plan to change is
> to make high level plot objects (scatter, error, histogram) etc, proper
> objects, ala gnuplot.  Right now they are methods that generate primitive
> objects (lines, rectangles, text, etc).

I thought I was using the object interface. It seemed strange to me that
methods of the axes were used to plot data, draw legends, and so on... It
seemed to make much more sense to have these as objects themselves. The
main problem is that there's no object you can alter to change their
appearance.

I quite like the object system I've developed, where the external
interface is completely based on building the object hierarchy and setting
properties of the objects (plus there is a "functional" interface, but
this is only used rarely for active operations, like fitting data).

I wanted an interface where I could twiddle a bit, and change the axis
from log to linear, or vertical to horizontal... I wasn't sure which
variables in the matplotlib source I could touch and get away with in
future releases :-)

> Another area you identify as a problem with matplotlib is the need to
> regenerate the entire graph when one property is changed.  This is true in
> one way and false in another.  matplotlib does have a proper object model
> -- eg, you can selectively change the facecolor of a marker w/o
> regenerating the graph scene.  But the *drawing* hierarchy (as opposed to
> the object hierarchy) needs some work .  Once you have changed a property,
> the entire graph is redrawn.  This is a known limitation and will change
> in the not-too-distant-future.  One advantage of working in mainstream in
> open source software is the network effect.  With 10 some-odd developers
> including institutions such as the U of C, STScI, JPL and NOAA, bugs and
> limitations of matplotlib tend to be fixed within minutes, days, weeks or
> months.

It looked to me that you could change some properties (like line style)
after creating the graph, but other things were hard to change (marker
style?). Therefore I deleted the graph and rebuilt it from scratch each
time. The way you modify a property is different from how you set it when
building a graph, and so it was difficult to create a transparent
interface.

> Your package looks very nice.  It specifically addresses two limitations
> in matplotlib that we would like to address -- a GUI interface for
> creating figures and a way to save the figure at any point as a high level
> description (rather than an image).  I do wish you had publicly voiced the
> problems you ran into along the way; I just searched the archives and saw
> only one post from you on the users list which I answered 28 minutes later
> with
> 
> http://sourceforge.net/mailarchive/message.php?msg_id=10124206
>
> after which I never heard from you again.  Such response times are fairly
> typical on the list, but if you don't report the bugs and follow up on the
> suggested fixes, we can't fix them.

Sorry - much of my work was done when I didn't have a very good internet
connection, and so it was hard for me to collaborate over bugs. I took the
easy option of expanding the small codebase I already have (which I knew
pretty well!), over debugging someone else's code.

> Anyway, nice work on veusz.  Are you committed to the GPL license?
> matplotlib uses a more permissive license (PSF compatible) mainly to
> encourage contributions from the commercial sector.  As you suggest, it is
> still possible for someone to take the work you've done on the GUI
> frontend and expose matplotlib as a backend based on your prior
> experiments.  The NASA Jet Propulsion Laboroatory and others are
> supporting the QT backend, and they might be willing to contribute some
> time to porting your GUI frontend to matplotlib, provided the license of
> veusz was compatible with the mpl license.

I quite like the idea of the GPL licence, as changes to the codebase
remain public. I'm a bit hampered by the GPL licence on PyQt to change my
code to another licence. I'm happy to re or dual-licence my code for other
projects if they believe there isn't a problem with linking PyQt against
their code. 

It may not be too hard to wrap around matplotlib with my current setup.
You'd just need to create objects to represent each plottable thing, and
would wrap to the matplotlib plotting methods of the Axes.

> There are two specific issues you raised in the scipy post you linked to
> that I'll take issue with:
> 
>   >> In my experience, the plotting code isn't that hard to do. The  
>   >> hardest part was making the axes look good.
> 
> In my experience, the hardest part of plotting code is supporting all the
> ways in which people want to use the code, and that includes embedding the
> plot in their GUI of choice, working across platforms, supporting script
> based, interactive shell work, application developers,  web app developers
> and so on.  There are quite a few plotting idioms that are mission
> critical to many developers, and supporting them all is a complex task. 
> I'm fond of pointing out the combinatorial problem -- take every GUI,
> cross two major versions in the wild, cross the big-three platforms, cross
> the standard ways in which people want to work with their plots and you
> have a lot of work to do.  veusz "solves" this problem by restricting
> choice, which is a respectable solution.  matplotlib takes the opposite
> tack and tries to support the user in the environment in which they want
> to work.

Yes - it's much harder to do the general thing like matplotlib does. Of
course you get the end benefit which is flexibility.

I do restrict people to PyQt of course. It was a route I chose to get a
quick result.

> The second point is
> 
>    >> I've done 90% of what's needed there. Basically, I'll be happy when
>    >> contouring and images are added.
> 
> I tend to disagree that contouring and images are only 10% --  good
> contouring, contour labeling, and image support strong enough to satisfy
> people for whom images are their lifeblood is hard, and almost impossible
> to do efficiently in pure python.  matplotlib isn't there yet, but the
> support for both is pretty strong and getting better, and matplotlib is
> increasingly being used by astronomers for image display.
>  But I see from your web page that you too are an astronomer, so I
> expect that you will handle these areas nicely; again, too bad we couldn't
> collaborate more. Another tough area to do right of course is nonlinear
> transformations (polar, log, mapping projections) with the associated
> problems of proper tick locating and labeling...

Maybe I glossed over the coordinate transformation thing! Yes - doing
proper sky coordinates and things like that is hard in general, in
particular getting the tick marks correct.

I had an interesting time getting it working for linear and log
coordinates, but that was well before I had heard of matplotlib! I think
my current code isn't bad for log and linear.

It's nice to do the transformation with numarray in a single line!

I took a long time to decide whether to continue with my own plotting
routines, or use matplotlib, and I found it a hard decision. I went my own
route as I had the freedom to redesign as I liked, was having fun with it,
I had written a fair chunk already, and I knew exactly how it worked. I'd
also got slightly annoyed by the bugs in previous versions of matplotlib
(which is a lot better in recent releases, I'm sure, and my code is not
free of bugs!).

Thanks for your reply

Jeremy



From tzot at sil-tec.gr  Wed Apr 20 12:06:15 2005
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Wed, 20 Apr 2005 19:06:15 +0300
Subject: goto statement
References: <mailman.2159.1113989175.1799.python-list@python.org>
	<d45cun$ec3$1@news.tsystems.kiev.ua>
	<mailman.2162.1113995666.1799.python-list@python.org>
	<42664190.6010507@i.com.ua>
	<mailman.2164.1113998230.1799.python-list@python.org>
	<d45gap$elj$1@news.tsystems.kiev.ua>
	<87vf6hlkix.fsf@wilson.rwth-aachen.de>
	<d45kna$f1o$1@news.tsystems.kiev.ua>
	<70sc615akd7mfdkmrjls956o1u5rglm74t@4ax.com>
	<mailman.2179.1114010665.1799.python-list@python.org>
Message-ID: <1fvc61tjv0jhq0fegrrq9fuv7v1jpqsvsl@4ax.com>

On Wed, 20 Apr 2005 16:24:19 +0100, rumours say that Simon Brunning
<simon.brunning at gmail.com> might have written:

>On 4/20/05, Christos TZOTZIOY Georgiou <tzot at sil-tec.gr> wrote:
>> If you need more help, I would gladly send you the output of `man vi'
>> from a non-GNU Unix.  I can also send you the output of `man vim' from a
>> GNU system.

[Simon]
>It'll probably be easier to convince Guido to introduce a 'goto'
>statement than it would be to learn vi.

I just happened to learn vi first before emacs, and this precedence set
my preference.  The only needed skill is to remember if you're in
'insert' or 'command' mode (or so I believe)...

>I'm really not sure if I'm joking or not.

Have you ever heard of anyone *joking* about their preferred or hated
text editor?-)
-- 
TZOTZIOY, I speak England very best.
"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...


From superprad at gmail.com  Sun Apr 24 12:44:49 2005
From: superprad at gmail.com (superprad at gmail.com)
Date: 24 Apr 2005 09:44:49 -0700
Subject: Bounding box on clusters in a 2D list
In-Reply-To: <426b0f51.369660724@news.oz.net>
References: <1114287475.805112.42550@o13g2000cwo.googlegroups.com>
	<426b0f51.369660724@news.oz.net>
Message-ID: <1114361089.412010.290250@g14g2000cwa.googlegroups.com>

Richter,yes what I am looking for is for cluster with rectangular
bounding boxes as you explained in the first figure.



From nikolai.kirsebom.NOJUNK at siemens.no  Mon Apr  4 09:55:15 2005
From: nikolai.kirsebom.NOJUNK at siemens.no (Nikolai Kirsebom)
Date: Mon, 04 Apr 2005 15:55:15 +0200
Subject: adodbapi return value
Message-ID: <ume251pif5d6jieb945ajo3ruohrt5e7p0@4ax.com>

I'm trying to use the adodbapi module, but run into the following
problem:

After initalization (connection, cursor) I have the following call to
a stored procedure (SQL Server, using SQLOLEDB.1 provider).

m = u'BrReg'
rs = u''
msg = u''
x = self.cur.callproc('__DocFetchBaseCategories', (0, 0, m, rs, msg))
print x
>>> [0, 0, u'BrReg', u'', u'']
print self.cur.returnValue
>>> None
print self.cur.rowcount
>>> -1

The procedure is enclosed below.  Strange thing is that if the
variable 'm' is set to an empty string, everything works ok, the
resultstate value (x[3]) becomes '_OK'.  However having the variable
'm' set to 'BrReg' as indicated, seems to result in the returned set
(x) not being updated.  When executing the Stored Procedure in Query
Analyzer, everything seems to be ok (BrReg is a valid value and
results in both '_OK' resultstate and a set of values (record set)).

When using the value m='', the returnValue when printed is 0.

---------------------------- FRAGMENT OF SQL CODE --------------------
create proc __DocFetchBaseCategories (
	@TraceLevel int, 
	@UserId int,
	@Module varchar(32),
	@Resultstate varchar(121) output,
	@Message varchar(255) output
) as
begin
	if @Module <> ''
	begin
		select 10000,
			C.Category,
			C.BaseCategory,
			C.CategoryDescription
		from _DerivedCategories D, _Categories C
		where D.Category like (@Module + '[_]%')
			and not D.BaseCategory like (@Module + '[_]%')
			and D.DerivedLevel = 1
			and D.Category = C.Category
	end
	else
	begin
		select 10000,
			Category,
			BaseCategory,
			CategoryDescription
		from _Categories
		where BaseCategory = ''
	end

	select @ResultState = '_OK',
		@Message = ''

NormalExit:

end

--------------------------------------------------------------------------------------------
The connection object reports 0 ADOerrors when I use the method
printADOerrors on the connection object.

Any help is appreciated.


Nikolai Kirsebom




From tjreedy at udel.edu  Mon Apr  4 19:56:40 2005
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 4 Apr 2005 19:56:40 -0400
Subject: sparse sets of integers?
References: <pan.2005.04.04.21.52.58.910482@dcs.nac.uci.edu>
Message-ID: <d2sk47$538$1@sea.gmane.org>


"Dan Stromberg" <strombrg at dcs.nac.uci.edu> wrote in message 
news:pan.2005.04.04.21.52.58.910482 at dcs.nac.uci.edu...
>
> Does anyone have a python implementation (or python C/C+ extension) that
> would allow me to perform set operations (union, intersection, 
> difference,
> number of elements, &c) over very large collections of integers?
>
> Some of the sets may have over 10**11 (probably less than 10**13
> though) integers in them, but there will tend to be runs of integers 
> being
> included or not included, so there might be 10**5 consecutive integers
> included, then 10**4 that are not included, and then another 10**6 that
> are.

I would call this chunky rather than sparse.  Or a set (ordered list) of 
integer ranges, which I am sure is how you implemented it before.  I did 
not find anything Googling 'Python integer range set' but would look harder 
before coding.

Terry J. Reedy





From programmer.py at gmail.com  Sat Apr 16 18:47:39 2005
From: programmer.py at gmail.com (Jaime Wyant)
Date: Sat, 16 Apr 2005 17:47:39 -0500
Subject: No subject
In-Reply-To: <20050416144244.7E18F1E4003@bag.python.org>
References: <20050416144244.7E18F1E4003@bag.python.org>
Message-ID: <d52c72d2050416154711cb719b@mail.gmail.com>

You need to look at the re module.
     
>>> import re
>>> dir(re)
>>> re.split('A|a', 'A big Fat CAt')
['', ' big F', 't C', 't']

Then google around for a regular expression tutorial...

jw


On 4/16/05, Michael.Coll-Barth at verizonwireless.com
<Michael.Coll-Barth at verizonwireless.com> wrote:
> All,
> 
> I have been going through the manuals and not having much luck with the
> following code.  This is basically an issue of giving 'split' multiple
> patterns to split a string.  If it had an ignore case switch, the problem
> would be solved.  Instead, I have to code the following, which works fine
> for a single byte string.  What can I do when I want to look for strings?
> 
> >>> test = 'A big Fat CAt'
> >>> A = test.split('A')
> >>> print A
> ['', ' big Fat C', 't']
> >>> a = []
> >>> for x in xrange(len(A)):
> ...     tmp = A[x].split('a')
> ...     for y in xrange(len(tmp)):
> ...         a.append(tmp[y])
> ...
> >>>
> >>> a
> ['', ' big F', 't C', 't']
> 
> It is odd about the help files, after I figure out how to do something, the
> help makes sense.  Before hand is another story...  Are there any others out
> there that share this misery?
> 
> thanks,
> Michael
> ___________________________________________________________________
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